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lalr1.javanu [ # Java skeleton for Bison -*- autoconf -*-
# Copyright (C) 2007-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_include(b4_pkgdatadir/[java.m4])
b4_defines_if([b4_fatal([%s: %%defines does not make sense in Java],
[b4_skeleton])])
# We do not depend on %debug in Java, but pacify warnings about
# non-used flags.
b4_parse_trace_if([0], [0])
m4_define([b4_symbol_no_destructor_assert],
[b4_symbol_if([$1], [has_destructor],
[b4_fatal([%s: %s: %%destructor does not make sense in Java],
[b4_skeleton],
[b4_symbol_action_location([$1], [destructor])])])])
b4_symbol_foreach([b4_symbol_no_destructor_assert])
# Setup some macros for api.push-pull.
b4_percent_define_default([[api.push-pull]], [[pull]])
b4_percent_define_check_values([[[[api.push-pull]],
[[pull]], [[push]], [[both]]]])
# Define m4 conditional macros that encode the value
# of the api.push-pull flag.
b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
m4_case(b4_percent_define_get([[api.push-pull]]),
[pull], [m4_define([b4_push_flag], [[0]])],
[push], [m4_define([b4_pull_flag], [[0]])])
# Define a macro to be true when api.push-pull has the value "both".
m4_define([b4_both_if],[b4_push_if([b4_pull_if([$1],[$2])],[$2])])
# Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
# tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the
# behavior of Bison at all when push parsing is already requested.
b4_define_flag_if([use_push_for_pull])
b4_use_push_for_pull_if([
b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
[m4_define([b4_push_flag], [[1]])])])
# Define a macro to encapsulate the parse state variables.
# This allows them to be defined either in parse() when doing
# pull parsing, or as class instance variable when doing push parsing.
m4_define([b4_define_state],[[
/* Lookahead and lookahead in internal form. */
int yychar = yyempty_;
int yytoken = 0;
/* State. */
int yyn = 0;
int yylen = 0;
int yystate = 0;
YYStack yystack = new YYStack ();
int label = YYNEWSTATE;
/* Error handling. */
int yynerrs_ = 0;
]b4_locations_if([/* The location where the error started. */
b4_location_type yyerrloc = null;
/* Location. */
b4_location_type yylloc = new b4_location_type (null, null);])[
/* Semantic value of the lookahead. */
]b4_yystype[ yylval = null;
]])
b4_output_begin([b4_parser_file_name])
b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
[2007-2015])
b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
])[/* First part of user declarations. */
]b4_user_pre_prologue
b4_user_post_prologue
b4_percent_code_get([[imports]])
[/**
* A Bison parser, automatically generated from ]m4_bpatsubst(b4_file_name, [^"\(.*\)"$], [\1])[.
*
* @@author LALR (1) parser skeleton written by Paolo Bonzini.
*/
]b4_percent_define_get3([annotations], [], [ ])dnl
b4_public_if([public ])dnl
b4_abstract_if([abstract ])dnl
b4_final_if([final ])dnl
b4_strictfp_if([strictfp ])dnl
[class ]b4_parser_class_name[]dnl
b4_percent_define_get3([extends], [ extends ])dnl
b4_percent_define_get3([implements], [ implements ])[
{
]b4_identification[
]b4_error_verbose_if([[
/**
* True if verbose error messages are enabled.
*/
private boolean yyErrorVerbose = true;
/**
* Return whether verbose error messages are enabled.
*/
public final boolean getErrorVerbose() { return yyErrorVerbose; }
/**
* Set the verbosity of error messages.
* @@param verbose True to request verbose error messages.
*/
public final void setErrorVerbose(boolean verbose)
{ yyErrorVerbose = verbose; }
]])
b4_locations_if([[
/**
* A class defining a pair of positions. Positions, defined by the
* ]b4_position_type[ class, denote a point in the input.
* Locations represent a part of the input through the beginning
* and ending positions.
*/
public class ]b4_location_type[ {
/**
* The first, inclusive, position in the range.
*/
public ]b4_position_type[ begin;
/**
* The first position beyond the range.
*/
public ]b4_position_type[ end;
/**
* Create a ]b4_location_type[ denoting an empty range located at
* a given point.
* @@param loc The position at which the range is anchored.
*/
public ]b4_location_type[ (]b4_position_type[ loc) {
this.begin = this.end = loc;
}
/**
* Create a ]b4_location_type[ from the endpoints of the range.
* @@param begin The first position included in the range.
* @@param end The first position beyond the range.
*/
public ]b4_location_type[ (]b4_position_type[ begin, ]b4_position_type[ end) {
this.begin = begin;
this.end = end;
}
/**
* Print a representation of the location. For this to be correct,
* ]b4_position_type[ should override the equals
* method.
*/
public String toString () {
if (begin.equals (end))
return begin.toString ();
else
return begin.toString () + "-" + end.toString ();
}
}
]])
b4_locations_if([[
private ]b4_location_type[ yylloc (YYStack rhs, int n)
{
if (n > 0)
return new ]b4_location_type[ (rhs.locationAt (n-1).begin, rhs.locationAt (0).end);
else
return new ]b4_location_type[ (rhs.locationAt (0).end);
}]])[
/**
* Communication interface between the scanner and the Bison-generated
* parser ]b4_parser_class_name[.
*/
public interface Lexer {
/** Token returned by the scanner to signal the end of its input. */
public static final int EOF = 0;
]b4_token_enums[
]b4_locations_if([[/**
* Method to retrieve the beginning position of the last scanned token.
* @@return the position at which the last scanned token starts.
*/
]b4_position_type[ getStartPos ();
/**
* Method to retrieve the ending position of the last scanned token.
* @@return the first position beyond the last scanned token.
*/
]b4_position_type[ getEndPos ();]])[
/**
* Method to retrieve the semantic value of the last scanned token.
* @@return the semantic value of the last scanned token.
*/
]b4_yystype[ getLVal ();
/**
* Entry point for the scanner. Returns the token identifier corresponding
* to the next token and prepares to return the semantic value
* ]b4_locations_if([and beginning/ending positions ])[of the token.
* @@return the token identifier corresponding to the next token.
*/
int yylex () ]b4_maybe_throws([b4_lex_throws])[;
/**
* Entry point for error reporting. Emits an error
* ]b4_locations_if([referring to the given location ])[in a user-defined way.
*
* ]b4_locations_if([[@@param loc The location of the element to which the
* error message is related]])[
* @@param msg The string for the error message.
*/
void yyerror (]b4_locations_if([b4_location_type[ loc, ]])[String msg);]
}
b4_lexer_if([[private class YYLexer implements Lexer {
]b4_percent_code_get([[lexer]])[
}
]])[/**
* The object doing lexical analysis for us.
*/
private Lexer yylexer;
]
b4_parse_param_vars
b4_lexer_if([[
/**
* Instantiates the Bison-generated parser.
*/
public ]b4_parser_class_name (b4_parse_param_decl([b4_lex_param_decl])[) ]b4_maybe_throws([b4_init_throws])[
{
]b4_percent_code_get([[init]])[
this.yylexer = new YYLexer(]b4_lex_param_call[);
]b4_parse_param_cons[
}
]])
/**
* Instantiates the Bison-generated parser.
* @@param yylexer The scanner that will supply tokens to the parser.
*/
b4_lexer_if([[protected]], [[public]]) b4_parser_class_name[ (]b4_parse_param_decl([[Lexer yylexer]])[) ]b4_maybe_throws([b4_init_throws])[
{
]b4_percent_code_get([[init]])[
this.yylexer = yylexer;
]b4_parse_param_cons[
}
private java.io.PrintStream yyDebugStream = System.err;
/**
* Return the PrintStream on which the debugging output is
* printed.
*/
public final java.io.PrintStream getDebugStream () { return yyDebugStream; }
/**
* Set the PrintStream on which the debug output is printed.
* @@param s The stream that is used for debugging output.
*/
public final void setDebugStream(java.io.PrintStream s) { yyDebugStream = s; }
private int yydebug = 0;
/**
* Answer the verbosity of the debugging output; 0 means that all kinds of
* output from the parser are suppressed.
*/
public final int getDebugLevel() { return yydebug; }
/**
* Set the verbosity of the debugging output; 0 means that all kinds of
* output from the parser are suppressed.
* @@param level The verbosity level for debugging output.
*/
public final void setDebugLevel(int level) { yydebug = level; }
/**
* Print an error message via the lexer.
*]b4_locations_if([[ Use a null location.]])[
* @@param msg The error message.
*/
public final void yyerror (String msg)
{
yylexer.yyerror (]b4_locations_if([[(]b4_location_type[)null, ]])[msg);
}
]b4_locations_if([[
/**
* Print an error message via the lexer.
* @@param loc The location associated with the message.
* @@param msg The error message.
*/
public final void yyerror (]b4_location_type[ loc, String msg)
{
yylexer.yyerror (loc, msg);
}
/**
* Print an error message via the lexer.
* @@param pos The position associated with the message.
* @@param msg The error message.
*/
public final void yyerror (]b4_position_type[ pos, String msg)
{
yylexer.yyerror (new ]b4_location_type[ (pos), msg);
}]])
[protected final void yycdebug (String s) {
if (yydebug > 0)
yyDebugStream.println (s);
}
private final class YYStack {
private int[] stateStack = new int[16];
]b4_locations_if([[private ]b4_location_type[[] locStack = new ]b4_location_type[[16];]])[
private ]b4_yystype[[] valueStack = new ]b4_yystype[[16];
public int size = 16;
public int height = -1;
public final void push (int state, ]b4_yystype[ value]dnl
b4_locations_if([, ]b4_location_type[ loc])[) {
height++;
if (size == height)
{
int[] newStateStack = new int[size * 2];
System.arraycopy (stateStack, 0, newStateStack, 0, height);
stateStack = newStateStack;
]b4_locations_if([[
]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
System.arraycopy (locStack, 0, newLocStack, 0, height);
locStack = newLocStack;]])
b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
System.arraycopy (valueStack, 0, newValueStack, 0, height);
valueStack = newValueStack;
size *= 2;
}
stateStack[height] = state;
]b4_locations_if([[locStack[height] = loc;]])[
valueStack[height] = value;
}
public final void pop () {
pop (1);
}
public final void pop (int num) {
// Avoid memory leaks... garbage collection is a white lie!
if (num > 0) {
java.util.Arrays.fill (valueStack, height - num + 1, height + 1, null);
]b4_locations_if([[java.util.Arrays.fill (locStack, height - num + 1, height + 1, null);]])[
}
height -= num;
}
public final int stateAt (int i) {
return stateStack[height - i];
}
]b4_locations_if([[public final ]b4_location_type[ locationAt (int i) {
return locStack[height - i];
}
]])[public final ]b4_yystype[ valueAt (int i) {
return valueStack[height - i];
}
// Print the state stack on the debug stream.
public void print (java.io.PrintStream out)
{
out.print ("Stack now");
for (int i = 0; i <= height; i++)
{
out.print (' ');
out.print (stateStack[i]);
}
out.println ();
}
}
/**
* Returned by a Bison action in order to stop the parsing process and
* return success (true).
*/
public static final int YYACCEPT = 0;
/**
* Returned by a Bison action in order to stop the parsing process and
* return failure (false).
*/
public static final int YYABORT = 1;
]b4_push_if([
/**
* Returned by a Bison action in order to request a new token.
*/
public static final int YYPUSH_MORE = 4;])[
/**
* Returned by a Bison action in order to start error recovery without
* printing an error message.
*/
public static final int YYERROR = 2;
/**
* Internal return codes that are not supported for user semantic
* actions.
*/
private static final int YYERRLAB = 3;
private static final int YYNEWSTATE = 4;
private static final int YYDEFAULT = 5;
private static final int YYREDUCE = 6;
private static final int YYERRLAB1 = 7;
private static final int YYRETURN = 8;
]b4_push_if([[ private static final int YYGETTOKEN = 9; /* Signify that a new token is expected when doing push-parsing. */]])[
private int yyerrstatus_ = 0;
]b4_push_if([dnl
b4_define_state])[
/**
* Return whether error recovery is being done. In this state, the parser
* reads token until it reaches a known state, and then restarts normal
* operation.
*/
public final boolean recovering ()
{
return yyerrstatus_ == 0;
}
/** Compute post-reduction state.
* @@param yystate the current state
* @@param yysym the nonterminal to push on the stack
*/
private int yy_lr_goto_state_ (int yystate, int yysym)
{
int yyr = yypgoto_[yysym - yyntokens_] + yystate;
if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
return yytable_[yyr];
else
return yydefgoto_[yysym - yyntokens_];
}
private int yyaction (int yyn, YYStack yystack, int yylen) ]b4_maybe_throws([b4_throws])[
{
]b4_yystype[ yyval;
]b4_locations_if([b4_location_type[ yyloc = yylloc (yystack, yylen);]])[
/* If YYLEN is nonzero, implement the default value of the action:
'$$ = $1'. Otherwise, use the top of the stack.
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
users should not rely upon it. */
if (yylen > 0)
yyval = yystack.valueAt (yylen - 1);
else
yyval = yystack.valueAt (0);
yy_reduce_print (yyn, yystack);
switch (yyn)
{
]b4_user_actions[
default: break;
}
yy_symbol_print ("-> $$ =", yyr1_[yyn], yyval]b4_locations_if([, yyloc])[);
yystack.pop (yylen);
yylen = 0;
/* Shift the result of the reduction. */
int yystate = yy_lr_goto_state_ (yystack.stateAt (0), yyr1_[yyn]);
yystack.push (yystate, yyval]b4_locations_if([, yyloc])[);
return YYNEWSTATE;
}
]b4_error_verbose_if([[
/* Return YYSTR after stripping away unnecessary quotes and
backslashes, so that it's suitable for yyerror. The heuristic is
that double-quoting is unnecessary unless the string contains an
apostrophe, a comma, or backslash (other than backslash-backslash).
YYSTR is taken from yytname. */
private final String yytnamerr_ (String yystr)
{
if (yystr.charAt (0) == '"')
{
StringBuffer yyr = new StringBuffer ();
strip_quotes: for (int i = 1; i < yystr.length (); i++)
switch (yystr.charAt (i))
{
case '\'':
case ',':
break strip_quotes;
case '\\':
if (yystr.charAt(++i) != '\\')
break strip_quotes;
/* Fall through. */
default:
yyr.append (yystr.charAt (i));
break;
case '"':
return yyr.toString ();
}
}
else if (yystr.equals ("$end"))
return "end of input";
return yystr;
}
]])[
/*--------------------------------.
| Print this symbol on YYOUTPUT. |
`--------------------------------*/
private void yy_symbol_print (String s, int yytype,
]b4_yystype[ yyvaluep]dnl
b4_locations_if([, Object yylocationp])[)
{
if (yydebug > 0)
yycdebug (s + (yytype < yyntokens_ ? " token " : " nterm ")
+ yytname_[yytype] + " ("]b4_locations_if([
+ yylocationp + ": "])[
+ (yyvaluep == null ? "(null)" : yyvaluep.toString ()) + ")");
}
]b4_push_if([],[[
/**
* Parse input from the scanner that was specified at object construction
* time. Return whether the end of the input was reached successfully.
*
* @@return true if the parsing succeeds. Note that this does not
* imply that there were no syntax errors.
*/
public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[]])[
]b4_push_if([
/**
* Push Parse input from external lexer
*
* @@param yylextoken current token
* @@param yylexval current lval
]b4_locations_if([ * @@param yylexloc current position])[
*
* @@return YYACCEPT, YYABORT, YYPUSH_MORE
*/
public int push_parse (int yylextoken, b4_yystype yylexval[]b4_locations_if([, b4_location_type yylexloc]))
b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])])[
{
]b4_locations_if([/* @@$. */
b4_location_type yyloc;])[
]b4_push_if([],[[
]b4_define_state[
yycdebug ("Starting parse\n");
yyerrstatus_ = 0;
/* Initialize the stack. */
yystack.push (yystate, yylval ]b4_locations_if([, yylloc])[);
]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([yylval], [], [yylloc])dnl
/* User initialization code. */
b4_user_initial_action
b4_dollar_popdef[]dnl
])[
]])[
]b4_push_if([[
if (!this.push_parse_initialized)
{
push_parse_initialize ();
]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([yylval], [], [yylloc])dnl
/* User initialization code. */
b4_user_initial_action
b4_dollar_popdef[]dnl
])[
yycdebug ("Starting parse\n");
yyerrstatus_ = 0;
} else
label = YYGETTOKEN;
boolean push_token_consumed = true;
]])[
for (;;)
switch (label)
{
/* New state. Unlike in the C/C++ skeletons, the state is already
pushed when we come here. */
case YYNEWSTATE:
yycdebug ("Entering state " + yystate + "\n");
if (yydebug > 0)
yystack.print (yyDebugStream);
/* Accept? */
if (yystate == yyfinal_)
]b4_push_if([{label = YYACCEPT; break;}],
[return true;])[
/* Take a decision. First try without lookahead. */
yyn = yypact_[yystate];
if (yy_pact_value_is_default_ (yyn))
{
label = YYDEFAULT;
break;
}
]b4_push_if([ /* Fall Through */
case YYGETTOKEN:])[
/* Read a lookahead token. */
if (yychar == yyempty_)
{
]b4_push_if([[
if (!push_token_consumed)
return YYPUSH_MORE;
yycdebug ("Reading a token: ");
yychar = yylextoken;
yylval = yylexval;]b4_locations_if([
yylloc = yylexloc;])[
push_token_consumed = false;]])[
]b4_push_if([],[[
yycdebug ("Reading a token: ");
yychar = yylexer.yylex ();
yylval = yylexer.getLVal ();]b4_locations_if([
yylloc = new b4_location_type (yylexer.getStartPos (),
yylexer.getEndPos ());])[
]])[
}
/* Convert token to internal form. */
if (yychar <= Lexer.EOF)
{
yychar = yytoken = Lexer.EOF;
yycdebug ("Now at end of input.\n");
}
else
{
yytoken = yytranslate_ (yychar);
yy_symbol_print ("Next token is", yytoken,
yylval]b4_locations_if([, yylloc])[);
}
/* If the proper action on seeing token YYTOKEN is to reduce or to
detect an error, take that action. */
yyn += yytoken;
if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
label = YYDEFAULT;
/* <= 0 means reduce or error. */
else if ((yyn = yytable_[yyn]) <= 0)
{
if (yy_table_value_is_error_ (yyn))
label = YYERRLAB;
else
{
yyn = -yyn;
label = YYREDUCE;
}
}
else
{
/* Shift the lookahead token. */
yy_symbol_print ("Shifting", yytoken,
yylval]b4_locations_if([, yylloc])[);
/* Discard the token being shifted. */
yychar = yyempty_;
/* Count tokens shifted since error; after three, turn off error
status. */
if (yyerrstatus_ > 0)
--yyerrstatus_;
yystate = yyn;
yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
label = YYNEWSTATE;
}
break;
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
case YYDEFAULT:
yyn = yydefact_[yystate];
if (yyn == 0)
label = YYERRLAB;
else
label = YYREDUCE;
break;
/*-----------------------------.
| yyreduce -- Do a reduction. |
`-----------------------------*/
case YYREDUCE:
yylen = yyr2_[yyn];
label = yyaction (yyn, yystack, yylen);
yystate = yystack.stateAt (0);
break;
/*------------------------------------.
| yyerrlab -- here on detecting error |
`------------------------------------*/
case YYERRLAB:
/* If not already recovering from an error, report this error. */
if (yyerrstatus_ == 0)
{
++yynerrs_;
if (yychar == yyempty_)
yytoken = yyempty_;
yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
}
]b4_locations_if([yyerrloc = yylloc;])[
if (yyerrstatus_ == 3)
{
/* If just tried and failed to reuse lookahead token after an
error, discard it. */
if (yychar <= Lexer.EOF)
{
/* Return failure if at end of input. */
if (yychar == Lexer.EOF)
]b4_push_if([{label = YYABORT; break;}],[return false;])[
}
else
yychar = yyempty_;
}
/* Else will try to reuse lookahead token after shifting the error
token. */
label = YYERRLAB1;
break;
/*-------------------------------------------------.
| errorlab -- error raised explicitly by YYERROR. |
`-------------------------------------------------*/
case YYERROR:
]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
/* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
yystack.pop (yylen);
yylen = 0;
yystate = yystack.stateAt (0);
label = YYERRLAB1;
break;
/*-------------------------------------------------------------.
| yyerrlab1 -- common code for both syntax error and YYERROR. |
`-------------------------------------------------------------*/
case YYERRLAB1:
yyerrstatus_ = 3; /* Each real token shifted decrements this. */
for (;;)
{
yyn = yypact_[yystate];
if (!yy_pact_value_is_default_ (yyn))
{
yyn += yyterror_;
if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
{
yyn = yytable_[yyn];
if (0 < yyn)
break;
}
}
/* Pop the current state because it cannot handle the
* error token. */
if (yystack.height == 0)
]b4_push_if([{label = YYABORT; break;}],[return false;])[
]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
yystack.pop ();
yystate = yystack.stateAt (0);
if (yydebug > 0)
yystack.print (yyDebugStream);
}
if (label == YYABORT)
/* Leave the switch. */
break;
]b4_locations_if([
/* Muck with the stack to setup for yylloc. */
yystack.push (0, null, yylloc);
yystack.push (0, null, yyerrloc);
yyloc = yylloc (yystack, 2);
yystack.pop (2);])[
/* Shift the error token. */
yy_symbol_print ("Shifting", yystos_[yyn],
yylval]b4_locations_if([, yyloc])[);
yystate = yyn;
yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
label = YYNEWSTATE;
break;
/* Accept. */
case YYACCEPT:
]b4_push_if([this.push_parse_initialized = false; return YYACCEPT;],
[return true;])[
/* Abort. */
case YYABORT:
]b4_push_if([this.push_parse_initialized = false; return YYABORT;],
[return false;])[
}
}
]b4_push_if([[
boolean push_parse_initialized = false;
/**
* (Re-)Initialize the state of the push parser.
*/
public void push_parse_initialize()
{
/* Lookahead and lookahead in internal form. */
this.yychar = yyempty_;
this.yytoken = 0;
/* State. */
this.yyn = 0;
this.yylen = 0;
this.yystate = 0;
this.yystack = new YYStack ();
this.label = YYNEWSTATE;
/* Error handling. */
this.yynerrs_ = 0;
]b4_locations_if([/* The location where the error started. */
this.yyerrloc = null;
this.yylloc = new b4_location_type (null, null);])[
/* Semantic value of the lookahead. */
this.yylval = null;
yystack.push (this.yystate, this.yylval]b4_locations_if([, this.yylloc])[);
this.push_parse_initialized = true;
}
]b4_locations_if([
/**
* Push parse given input from an external lexer.
*
* @@param yylextoken current token
* @@param yylexval current lval
* @@param yyylexpos current position
*
* @@return YYACCEPT, YYABORT, YYPUSH_MORE
*/
public int push_parse (int yylextoken, b4_yystype yylexval, b4_position_type yylexpos)
b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])
{
return push_parse (yylextoken, yylexval, new b4_location_type (yylexpos));
}
])[]])
b4_both_if([[
/**
* Parse input from the scanner that was specified at object construction
* time. Return whether the end of the input was reached successfully.
* This version of parse () is defined only when api.push-push=both.
*
* @@return true if the parsing succeeds. Note that this does not
* imply that there were no syntax errors.
*/
public boolean parse () ]b4_maybe_throws([b4_list2([b4_lex_throws], [b4_throws])])[
{
if (yylexer == null)
throw new NullPointerException("Null Lexer");
int status;
do {
int token = yylexer.yylex();
]b4_yystype[ lval = yylexer.getLVal();
]b4_locations_if([dnl
b4_location_type yyloc = new b4_location_type (yylexer.getStartPos (),
yylexer.getEndPos ());])[
]b4_locations_if([status = push_parse(token,lval,yyloc);],[
status = push_parse(token,lval);])[
} while (status == YYPUSH_MORE);
return (status == YYACCEPT);
}
]])[
// Generate an error message.
private String yysyntax_error (int yystate, int tok)
{]b4_error_verbose_if([[
if (yyErrorVerbose)
{
/* There are many possibilities here to consider:
- If this state is a consistent state with a default action,
then the only way this function was invoked is if the
default action is an error action. In that case, don't
check for expected tokens because there are none.
- The only way there can be no lookahead present (in tok) is
if this state is a consistent state with a default action.
Thus, detecting the absence of a lookahead is sufficient to
determine that there is no unexpected or expected token to
report. In that case, just report a simple "syntax error".
- Don't assume there isn't a lookahead just because this
state is a consistent state with a default action. There
might have been a previous inconsistent state, consistent
state with a non-default action, or user semantic action
that manipulated yychar. (However, yychar is currently out
of scope during semantic actions.)
- Of course, the expected token list depends on states to
have correct lookahead information, and it depends on the
parser not to perform extra reductions after fetching a
lookahead from the scanner and before detecting a syntax
error. Thus, state merging (from LALR or IELR) and default
reductions corrupt the expected token list. However, the
list is correct for canonical LR with one exception: it
will still contain any token that will not be accepted due
to an error action in a later state.
*/
if (tok != yyempty_)
{
/* FIXME: This method of building the message is not compatible
with internationalization. */
StringBuffer res =
new StringBuffer ("syntax error, unexpected ");
res.append (yytnamerr_ (yytname_[tok]));
int yyn = yypact_[yystate];
if (!yy_pact_value_is_default_ (yyn))
{
/* Start YYX at -YYN if negative to avoid negative
indexes in YYCHECK. In other words, skip the first
-YYN actions for this state because they are default
actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = yylast_ - yyn + 1;
int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
int count = 0;
for (int x = yyxbegin; x < yyxend; ++x)
if (yycheck_[x + yyn] == x && x != yyterror_
&& !yy_table_value_is_error_ (yytable_[x + yyn]))
++count;
if (count < 5)
{
count = 0;
for (int x = yyxbegin; x < yyxend; ++x)
if (yycheck_[x + yyn] == x && x != yyterror_
&& !yy_table_value_is_error_ (yytable_[x + yyn]))
{
res.append (count++ == 0 ? ", expecting " : " or ");
res.append (yytnamerr_ (yytname_[x]));
}
}
}
return res.toString ();
}
}
]])[
return "syntax error";
}
/**
* Whether the given yypact_ value indicates a defaulted state.
* @@param yyvalue the value to check
*/
private static boolean yy_pact_value_is_default_ (int yyvalue)
{
return yyvalue == yypact_ninf_;
}
/**
* Whether the given yytable_
* value indicates a syntax error.
* @@param yyvalue the value to check
*/
private static boolean yy_table_value_is_error_ (int yyvalue)
{
return yyvalue == yytable_ninf_;
}
private static final ]b4_int_type_for([b4_pact])[ yypact_ninf_ = ]b4_pact_ninf[;
private static final ]b4_int_type_for([b4_table])[ yytable_ninf_ = ]b4_table_ninf[;
]b4_parser_tables_define[
]b4_integral_parser_table_define([token_number], [b4_toknum],
[[YYTOKEN_NUMBER[YYLEX-NUM] -- Internal symbol number corresponding
to YYLEX-NUM.]])[
/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
First, the terminals, then, starting at \a yyntokens_, nonterminals. */
]b4_typed_parser_table_define([String], [tname], [b4_tname])[
]b4_integral_parser_table_define([rline], [b4_rline],
[[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
// Report on the debug stream that the rule yyrule is going to be reduced.
private void yy_reduce_print (int yyrule, YYStack yystack)
{
if (yydebug == 0)
return;
int yylno = yyrline_[yyrule];
int yynrhs = yyr2_[yyrule];
/* Print the symbols being reduced, and their result. */
yycdebug ("Reducing stack by rule " + (yyrule - 1)
+ " (line " + yylno + "), ");
/* The symbols being reduced. */
for (int yyi = 0; yyi < yynrhs; yyi++)
yy_symbol_print (" $" + (yyi + 1) + " =",
yystos_[yystack.stateAt(yynrhs - (yyi + 1))],
]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
b4_rhs_location(yynrhs, yyi + 1)])[);
}
/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */
]b4_integral_parser_table_define([translate_table], [b4_translate])[
private static final ]b4_int_type_for([b4_translate])[ yytranslate_ (int t)
{
if (t >= 0 && t <= yyuser_token_number_max_)
return yytranslate_table_[t];
else
return yyundef_token_;
}
private static final int yylast_ = ]b4_last[;
private static final int yynnts_ = ]b4_nterms_number[;
private static final int yyempty_ = -2;
private static final int yyfinal_ = ]b4_final_state_number[;
private static final int yyterror_ = 1;
private static final int yyerrcode_ = 256;
private static final int yyntokens_ = ]b4_tokens_number[;
private static final int yyuser_token_number_max_ = ]b4_user_token_number_max[;
private static final int yyundef_token_ = ]b4_undef_token_number[;
]/* User implementation code. */
b4_percent_code_get[]dnl
}
b4_epilogue[]dnl
b4_output_end()
PK lCiZ3s.
# Sanity checks, before defaults installed by c.m4.
b4_percent_define_ifdef([[api.value.union.name]],
[b4_complain_at(b4_percent_define_get_loc([[api.value.union.name]]),
[named %union is invalid in C++])])
m4_include(b4_pkgdatadir/[c.m4])
# b4_comment(TEXT, [PREFIX])
# --------------------------
# Put TEXT in comment. Prefix all the output lines with PREFIX.
m4_define([b4_comment],
[b4_comment_([$1], [$2// ], [$2// ])])
## -------- ##
## Checks. ##
## -------- ##
b4_percent_define_check_kind([api.namespace], [code], [deprecated])
b4_percent_define_check_kind([parser_class_name], [code], [deprecated])
## ---------------- ##
## Default values. ##
## ---------------- ##
b4_percent_define_default([[parser_class_name]], [[parser]])
# Don't do that so that we remember whether we're using a user
# request, or the default value.
#
# b4_percent_define_default([[api.location.type]], [[location]])
b4_percent_define_default([[filename_type]], [[std::string]])
# Make it a warning for those who used betas of Bison 3.0.
b4_percent_define_default([[api.namespace]], m4_defn([b4_prefix]))
b4_percent_define_default([[global_tokens_and_yystype]], [[false]])
b4_percent_define_default([[define_location_comparison]],
[m4_if(b4_percent_define_get([[filename_type]]),
[std::string], [[true]], [[false]])])
## ----------- ##
## Namespace. ##
## ----------- ##
m4_define([b4_namespace_ref], [b4_percent_define_get([[api.namespace]])])
# Don't permit an empty b4_namespace_ref. Any '::parser::foo' appended to it
# would compile as an absolute reference with 'parser' in the global namespace.
# b4_namespace_open would open an anonymous namespace and thus establish
# internal linkage. This would compile. However, it's cryptic, and internal
# linkage for the parser would be specified in all translation units that
# include the header, which is always generated. If we ever need to permit
# internal linkage somehow, surely we can find a cleaner approach.
m4_if(m4_bregexp(b4_namespace_ref, [^[ ]*$]), [-1], [],
[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference is empty]])])
# Instead of assuming the C++ compiler will do it, Bison should reject any
# invalid b4_namepsace_ref that would be converted to a valid
# b4_namespace_open. The problem is that Bison doesn't always output
# b4_namespace_ref to uncommented code but should reserve the ability to do so
# in future releases without risking breaking any existing user grammars.
# Specifically, don't allow empty names as b4_namespace_open would just convert
# those into anonymous namespaces, and that might tempt some users.
m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*::]), [-1], [],
[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference has consecutive "::"]])])
m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*$]), [-1], [],
[b4_complain_at(b4_percent_define_get_loc([[api.namespace]]),
[[namespace reference has a trailing "::"]])])
m4_define([b4_namespace_open],
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
[^\(.\)[ ]*::], [\1])),
[::], [ { namespace ])[ {]])])
m4_define([b4_namespace_close],
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
[^\(.\)[ ]*\(::\)?\([^][:]\|:[^:]\)*],
[\1])),
[::\([^][:]\|:[^:]\)*], [} ])[} // ]b4_namespace_ref])])
# b4_token_enums
# --------------
# Output the definition of the tokens as enums.
m4_define([b4_token_enums],
[[enum yytokentype
{
]m4_join([,
],
b4_symbol_map([b4_token_enum]))[
};]dnl
])
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
# b4_value_type_declare
# ---------------------
# Declare semantic_type.
m4_define([b4_value_type_declare],
[b4_value_type_setup[]dnl
[ /// Symbol semantic values.
]m4_bmatch(b4_percent_define_get_kind([[api.value.type]]),
[code],
[[ typedef ]b4_percent_define_get([[api.value.type]])[ semantic_type;]],
[m4_bmatch(b4_percent_define_get([[api.value.type]]),
[union\|union-directive],
[[ union semantic_type
{
]b4_user_union_members[
};]])])dnl
])
# b4_public_types_declare
# -----------------------
# Define the public types: token, semantic value, location, and so forth.
# Depending on %define token_lex, may be output in the header or source file.
m4_define([b4_public_types_declare],
[[#ifndef ]b4_api_PREFIX[STYPE
]b4_value_type_declare[
#else
typedef ]b4_api_PREFIX[STYPE semantic_type;
#endif]b4_locations_if([
/// Symbol locations.
typedef b4_percent_define_get([[api.location.type]],
[[location]]) location_type;])[
/// Syntax errors thrown from user actions.
struct syntax_error : std::runtime_error
{
syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m);]b4_locations_if([
location_type location;])[
};
/// Tokens.
struct token
{
]b4_token_enums[
};
/// (External) token type, as returned by yylex.
typedef token::yytokentype token_type;
/// Symbol type: an internal symbol number.
typedef int symbol_number_type;
/// The symbol type number to denote an empty symbol.
enum { empty_symbol = -2 };
/// Internal symbol number for tokens (subsumed by symbol_number_type).
typedef ]b4_int_type_for([b4_translate])[ token_number_type;
/// A complete symbol.
///
/// Expects its Base type to provide access to the symbol type
/// via type_get().
///
/// Provide access to semantic value]b4_locations_if([ and location])[.
template
struct basic_symbol : Base
{
/// Alias to Base.
typedef Base super_type;
/// Default constructor.
basic_symbol ();
/// Copy constructor.
basic_symbol (const basic_symbol& other);
]b4_variant_if([[
/// Constructor for valueless symbols, and symbols from each type.
]b4_type_foreach([b4_basic_symbol_constructor_declare])], [[
/// Constructor for valueless symbols.
basic_symbol (typename Base::kind_type t]b4_locations_if([,
const location_type& l])[);]])[
/// Constructor for symbols with semantic value.
basic_symbol (typename Base::kind_type t,
const semantic_type& v]b4_locations_if([,
const location_type& l])[);
/// Destroy the symbol.
~basic_symbol ();
/// Destroy contents, and record that is empty.
void clear ();
/// Whether empty.
bool empty () const;
/// Destructive move, \a s is emptied into this.
void move (basic_symbol& s);
/// The semantic value.
semantic_type value;]b4_locations_if([
/// The location.
location_type location;])[
private:
/// Assignment operator.
basic_symbol& operator= (const basic_symbol& other);
};
/// Type access provider for token (enum) based symbols.
struct by_type
{
/// Default constructor.
by_type ();
/// Copy constructor.
by_type (const by_type& other);
/// The symbol type as needed by the constructor.
typedef token_type kind_type;
/// Constructor from (external) token numbers.
by_type (kind_type t);
/// Record that this symbol is empty.
void clear ();
/// Steal the symbol type from \a that.
void move (by_type& that);
/// The (internal) type number (corresponding to \a type).
/// \a empty when empty.
symbol_number_type type_get () const;
/// The token.
token_type token () const;
/// The symbol type.
/// \a empty_symbol when empty.
/// An int, not token_number_type, to be able to store empty_symbol.
int type;
};
/// "External" symbols: returned by the scanner.
typedef basic_symbol symbol_type;
]b4_symbol_constructor_declare])
# b4_public_types_define
# ----------------------
# Provide the implementation needed by the public types.
m4_define([b4_public_types_define],
[[ inline
]b4_parser_class_name[::syntax_error::syntax_error (]b4_locations_if([const location_type& l, ])[const std::string& m)
: std::runtime_error (m)]b4_locations_if([
, location (l)])[
{}
// basic_symbol.
template
inline
]b4_parser_class_name[::basic_symbol::basic_symbol ()
: value ()
{}
template
inline
]b4_parser_class_name[::basic_symbol::basic_symbol (const basic_symbol& other)
: Base (other)
, value ()]b4_locations_if([
, location (other.location)])[
{
]b4_variant_if([b4_symbol_variant([other.type_get ()], [value], [copy],
[other.value])],
[value = other.value;])[
}
template
inline
]b4_parser_class_name[::basic_symbol::basic_symbol (]b4_join(
[typename Base::kind_type t],
[const semantic_type& v],
b4_locations_if([const location_type& l]))[)
: Base (t)
, value (]b4_variant_if([], [v])[)]b4_locations_if([
, location (l)])[
{]b4_variant_if([[
(void) v;
]b4_symbol_variant([this->type_get ()], [value], [copy], [v])])[}
]b4_variant_if([[
// Implementation of basic_symbol constructor for each type.
]b4_type_foreach([b4_basic_symbol_constructor_define])], [[
/// Constructor for valueless symbols.
template
inline
]b4_parser_class_name[::basic_symbol::basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_locations_if([const location_type& l]))[)
: Base (t)
, value ()]b4_locations_if([
, location (l)])[
{}]])[
template
inline
]b4_parser_class_name[::basic_symbol::~basic_symbol ()
{
clear ();
}
template
inline
void
]b4_parser_class_name[::basic_symbol::clear ()
{]b4_variant_if([[
// User destructor.
symbol_number_type yytype = this->type_get ();
basic_symbol& yysym = *this;
(void) yysym;
switch (yytype)
{
]b4_symbol_foreach([b4_symbol_destructor])dnl
[ default:
break;
}
// Type destructor.
]b4_symbol_variant([[yytype]], [[value]], [[template destroy]])])[
Base::clear ();
}
template
inline
bool
]b4_parser_class_name[::basic_symbol::empty () const
{
return Base::type_get () == empty_symbol;
}
template
inline
void
]b4_parser_class_name[::basic_symbol::move (basic_symbol& s)
{
super_type::move(s);
]b4_variant_if([b4_symbol_variant([this->type_get ()], [value], [move],
[s.value])],
[value = s.value;])[]b4_locations_if([
location = s.location;])[
}
// by_type.
inline
]b4_parser_class_name[::by_type::by_type ()
: type (empty_symbol)
{}
inline
]b4_parser_class_name[::by_type::by_type (const by_type& other)
: type (other.type)
{}
inline
]b4_parser_class_name[::by_type::by_type (token_type t)
: type (yytranslate_ (t))
{}
inline
void
]b4_parser_class_name[::by_type::clear ()
{
type = empty_symbol;
}
inline
void
]b4_parser_class_name[::by_type::move (by_type& that)
{
type = that.type;
that.clear ();
}
inline
int
]b4_parser_class_name[::by_type::type_get () const
{
return type;
}
]b4_token_ctor_if([[
inline
]b4_parser_class_name[::token_type
]b4_parser_class_name[::by_type::token () const
{
// YYTOKNUM[NUM] -- (External) token number corresponding to the
// (internal) symbol number NUM (which must be that of a token). */
static
const ]b4_int_type_for([b4_toknum])[
yytoken_number_[] =
{
]b4_toknum[
};
return static_cast (yytoken_number_[type]);
}
]])[]dnl
b4_symbol_constructor_define])
# b4_symbol_constructor_declare
# b4_symbol_constructor_define
# -----------------------------
# Declare/define symbol constructors for all the value types.
# Use at class-level. Redefined in variant.hh.
m4_define([b4_symbol_constructor_declare], [])
m4_define([b4_symbol_constructor_define], [])
# b4_yytranslate_define
# ---------------------
# Define yytranslate_. Sometimes used in the header file,
# sometimes in the cc file.
m4_define([b4_yytranslate_define],
[[ // Symbol number corresponding to token number t.
inline
]b4_parser_class_name[::token_number_type
]b4_parser_class_name[::yytranslate_ (]b4_token_ctor_if([token_type],
[int])[ t)
{
static
const token_number_type
translate_table[] =
{
]b4_translate[
};
const unsigned int user_token_number_max_ = ]b4_user_token_number_max[;
const token_number_type undef_token_ = ]b4_undef_token_number[;
if (static_cast(t) <= yyeof_)
return yyeof_;
else if (static_cast (t) <= user_token_number_max_)
return translate_table[t];
else
return undef_token_;
}
]])
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $$.
m4_define([b4_lhs_value],
[b4_symbol_value([yyval], [$1])])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[b4_symbol_value([yysemantic_stack_@{($1) - ($2)@}], [$3])])
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[(yyloc)])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[(yylocation_stack_@{($1) - ($2)@})])
# b4_parse_param_decl
# -------------------
# Extra formal arguments of the constructor.
# Change the parameter names from "foo" into "foo_yyarg", so that
# there is no collision bw the user chosen attribute name, and the
# argument name in the constructor.
m4_define([b4_parse_param_decl],
[m4_ifset([b4_parse_param],
[m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
m4_define([b4_parse_param_decl_1],
[$1_yyarg])
# b4_parse_param_cons
# -------------------
# Extra initialisations of the constructor.
m4_define([b4_parse_param_cons],
[m4_ifset([b4_parse_param],
[
b4_cc_constructor_calls(b4_parse_param)])])
m4_define([b4_cc_constructor_calls],
[m4_map_sep([b4_cc_constructor_call], [,
], [$@])])
m4_define([b4_cc_constructor_call],
[$2 ($2_yyarg)])
# b4_parse_param_vars
# -------------------
# Extra instance variables.
m4_define([b4_parse_param_vars],
[m4_ifset([b4_parse_param],
[
// User arguments.
b4_cc_var_decls(b4_parse_param)])])
m4_define([b4_cc_var_decls],
[m4_map_sep([b4_cc_var_decl], [
], [$@])])
m4_define([b4_cc_var_decl],
[ $1;])
## ---------##
## Values. ##
## ---------##
# b4_yylloc_default_define
# ------------------------
# Define YYLLOC_DEFAULT.
m4_define([b4_yylloc_default_define],
[[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
If N is 0, then set CURRENT to the empty location which ends
the previous symbol: RHS[0] (always defined). */
# ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
do \
if (N) \
{ \
(Current).begin = YYRHSLOC (Rhs, 1).begin; \
(Current).end = YYRHSLOC (Rhs, N).end; \
} \
else \
{ \
(Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end; \
} \
while (/*CONSTCOND*/ false)
# endif
]])
## -------- ##
## Checks. ##
## -------- ##
b4_token_ctor_if([b4_variant_if([],
[b4_fatal_at(b4_percent_define_get_loc(api.token.constructor),
[cannot use '%s' without '%s'],
[%define api.token.constructor],
[%define api.value.type variant]))])])
PK lCiZ^8 m4sugar/m4sugar.m4nu [ divert(-1)# -*- Autoconf -*-
# This file is part of Autoconf.
# Base M4 layer.
# Requires GNU M4.
#
# Copyright (C) 1999-2013 Free Software Foundation, Inc.
# This file is part of Autoconf. This program is free
# software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# Under Section 7 of GPL version 3, you are granted additional
# permissions described in the Autoconf Configure Script Exception,
# version 3.0, as published by the Free Software Foundation.
#
# You should have received a copy of the GNU General Public License
# and a copy of the Autoconf Configure Script Exception along with
# this program; see the files COPYINGv3 and COPYING.EXCEPTION
# respectively. If not, see .
# Written by Akim Demaille.
# Set the quotes, whatever the current quoting system.
changequote()
changequote([, ])
# Some old m4's don't support m4exit. But they provide
# equivalent functionality by core dumping because of the
# long macros we define.
ifdef([__gnu__], ,
[errprint(M4sugar requires GNU M4. Install it before installing M4sugar or
set the M4 environment variable to its absolute file name.)
m4exit(2)])
## ------------------------------- ##
## 1. Simulate --prefix-builtins. ##
## ------------------------------- ##
# m4_define
# m4_defn
# m4_undefine
define([m4_define], defn([define]))
define([m4_defn], defn([defn]))
define([m4_undefine], defn([undefine]))
m4_undefine([define])
m4_undefine([defn])
m4_undefine([undefine])
# m4_copy(SRC, DST)
# -----------------
# Define DST as the definition of SRC.
# What's the difference between:
# 1. m4_copy([from], [to])
# 2. m4_define([to], [from($@)])
# Well, obviously 1 is more expensive in space. Maybe 2 is more expensive
# in time, but because of the space cost of 1, it's not that obvious.
# Nevertheless, one huge difference is the handling of `$0'. If `from'
# uses `$0', then with 1, `to''s `$0' is `to', while it is `from' in 2.
# The user would certainly prefer to see `to'.
#
# This definition is in effect during m4sugar initialization, when
# there are no pushdef stacks; later on, we redefine it to something
# more powerful for all other clients to use.
m4_define([m4_copy],
[m4_define([$2], m4_defn([$1]))])
# m4_rename(SRC, DST)
# -------------------
# Rename the macro SRC to DST.
m4_define([m4_rename],
[m4_copy([$1], [$2])m4_undefine([$1])])
# m4_rename_m4(MACRO-NAME)
# ------------------------
# Rename MACRO-NAME to m4_MACRO-NAME.
m4_define([m4_rename_m4],
[m4_rename([$1], [m4_$1])])
# m4_copy_unm4(m4_MACRO-NAME)
# ---------------------------
# Copy m4_MACRO-NAME to MACRO-NAME.
m4_define([m4_copy_unm4],
[m4_copy([$1], m4_bpatsubst([$1], [^m4_\(.*\)], [[\1]]))])
# Some m4 internals have names colliding with tokens we might use.
# Rename them a` la `m4 --prefix-builtins'. Conditionals first, since
# some subsequent renames are conditional.
m4_rename_m4([ifdef])
m4_rename([ifelse], [m4_if])
m4_rename_m4([builtin])
m4_rename_m4([changecom])
m4_rename_m4([changequote])
m4_ifdef([changeword],dnl conditionally available in 1.4.x
[m4_undefine([changeword])])
m4_rename_m4([debugfile])
m4_rename_m4([debugmode])
m4_rename_m4([decr])
m4_rename_m4([divnum])
m4_rename_m4([dumpdef])
m4_rename_m4([errprint])
m4_rename_m4([esyscmd])
m4_rename_m4([eval])
m4_rename_m4([format])
m4_undefine([include])
m4_rename_m4([incr])
m4_rename_m4([index])
m4_rename_m4([indir])
m4_rename_m4([len])
m4_rename([m4exit], [m4_exit])
m4_undefine([m4wrap])
m4_ifdef([mkstemp],dnl added in M4 1.4.8
[m4_rename_m4([mkstemp])
m4_copy([m4_mkstemp], [m4_maketemp])
m4_undefine([maketemp])],
[m4_rename_m4([maketemp])
m4_copy([m4_maketemp], [m4_mkstemp])])
m4_rename([patsubst], [m4_bpatsubst])
m4_rename_m4([popdef])
m4_rename_m4([pushdef])
m4_rename([regexp], [m4_bregexp])
m4_rename_m4([shift])
m4_undefine([sinclude])
m4_rename_m4([substr])
m4_ifdef([symbols],dnl present only in alpha-quality 1.4o
[m4_rename_m4([symbols])])
m4_rename_m4([syscmd])
m4_rename_m4([sysval])
m4_rename_m4([traceoff])
m4_rename_m4([traceon])
m4_rename_m4([translit])
# _m4_defn(ARG)
# -------------
# _m4_defn is for internal use only - it bypasses the wrapper, so it
# must only be used on one argument at a time, and only on macros
# known to be defined. Make sure this still works if the user renames
# m4_defn but not _m4_defn.
m4_copy([m4_defn], [_m4_defn])
# _m4_divert_raw(NUM)
# -------------------
# _m4_divert_raw is for internal use only. Use this instead of
# m4_builtin([divert], NUM), so that tracing diversion flow is easier.
m4_rename([divert], [_m4_divert_raw])
# _m4_popdef(ARG...)
# ------------------
# _m4_popdef is for internal use only - it bypasses the wrapper, so it
# must only be used on macros known to be defined. Make sure this
# still works if the user renames m4_popdef but not _m4_popdef.
m4_copy([m4_popdef], [_m4_popdef])
# _m4_undefine(ARG...)
# --------------------
# _m4_undefine is for internal use only - it bypasses the wrapper, so
# it must only be used on macros known to be defined. Make sure this
# still works if the user renames m4_undefine but not _m4_undefine.
m4_copy([m4_undefine], [_m4_undefine])
# _m4_undivert(NUM...)
# --------------------
# _m4_undivert is for internal use only, and should always be given
# arguments. Use this instead of m4_builtin([undivert], NUM...), so
# that tracing diversion flow is easier.
m4_rename([undivert], [_m4_undivert])
## ------------------- ##
## 2. Error messages. ##
## ------------------- ##
# m4_location
# -----------
# Output the current file, colon, and the current line number.
m4_define([m4_location],
[__file__:__line__])
# m4_errprintn(MSG)
# -----------------
# Same as `errprint', but with the missing end of line.
m4_define([m4_errprintn],
[m4_errprint([$1
])])
# m4_warning(MSG)
# ---------------
# Warn the user.
m4_define([m4_warning],
[m4_errprintn(m4_location[: warning: $1])])
# m4_fatal(MSG, [EXIT-STATUS])
# ----------------------------
# Fatal the user. :)
m4_define([m4_fatal],
[m4_errprintn(m4_location[: error: $1]
m4_expansion_stack)m4_exit(m4_if([$2],, 1, [$2]))])
# m4_assert(EXPRESSION, [EXIT-STATUS = 1])
# ----------------------------------------
# This macro ensures that EXPRESSION evaluates to true, and exits if
# EXPRESSION evaluates to false.
m4_define([m4_assert],
[m4_if(m4_eval([$1]), 0,
[m4_fatal([assert failed: $1], [$2])])])
## ------------- ##
## 3. Warnings. ##
## ------------- ##
# _m4_warn(CATEGORY, MESSAGE, [STACK-TRACE])
# ------------------------------------------
# Report a MESSAGE to the user if the CATEGORY of warnings is enabled.
# This is for traces only.
# If present, STACK-TRACE is a \n-separated list of "LOCATION: MESSAGE",
# where the last line (and no other) ends with "the top level".
#
# Within m4, the macro is a no-op. This macro really matters
# when autom4te post-processes the trace output.
m4_define([_m4_warn], [])
# m4_warn(CATEGORY, MESSAGE)
# --------------------------
# Report a MESSAGE to the user if the CATEGORY of warnings is enabled.
m4_define([m4_warn],
[_m4_warn([$1], [$2],
m4_ifdef([_m4_expansion_stack], [m4_expansion_stack]))])
## ------------------- ##
## 4. File inclusion. ##
## ------------------- ##
# We also want to neutralize include (and sinclude for symmetry),
# but we want to extend them slightly: warn when a file is included
# several times. This is, in general, a dangerous operation, because
# too many people forget to quote the first argument of m4_define.
#
# For instance in the following case:
# m4_define(foo, [bar])
# then a second reading will turn into
# m4_define(bar, [bar])
# which is certainly not what was meant.
# m4_include_unique(FILE)
# -----------------------
# Declare that the FILE was loading; and warn if it has already
# been included.
m4_define([m4_include_unique],
[m4_ifdef([m4_include($1)],
[m4_warn([syntax], [file `$1' included several times])])dnl
m4_define([m4_include($1)])])
# m4_include(FILE)
# ----------------
# Like the builtin include, but warns against multiple inclusions.
m4_define([m4_include],
[m4_include_unique([$1])dnl
m4_builtin([include], [$1])])
# m4_sinclude(FILE)
# -----------------
# Like the builtin sinclude, but warns against multiple inclusions.
m4_define([m4_sinclude],
[m4_include_unique([$1])dnl
m4_builtin([sinclude], [$1])])
## ------------------------------------ ##
## 5. Additional branching constructs. ##
## ------------------------------------ ##
# Both `m4_ifval' and `m4_ifset' tests against the empty string. The
# difference is that `m4_ifset' is specialized on macros.
#
# In case of arguments of macros, eg. $1, it makes little difference.
# In the case of a macro `FOO', you don't want to check `m4_ifval(FOO,
# TRUE)', because if `FOO' expands with commas, there is a shifting of
# the arguments. So you want to run `m4_ifval([FOO])', but then you just
# compare the *string* `FOO' against `', which, of course fails.
#
# So you want the variation `m4_ifset' that expects a macro name as $1.
# If this macro is both defined and defined to a non empty value, then
# it runs TRUE, etc.
# m4_ifblank(COND, [IF-BLANK], [IF-TEXT])
# m4_ifnblank(COND, [IF-TEXT], [IF-BLANK])
# ----------------------------------------
# If COND is empty, or consists only of blanks (space, tab, newline),
# then expand IF-BLANK, otherwise expand IF-TEXT. This differs from
# m4_ifval only if COND has just whitespace, but it helps optimize in
# spite of users who mistakenly leave trailing space after what they
# thought was an empty argument:
# macro(
# []
# )
#
# Writing one macro in terms of the other causes extra overhead, so
# we inline both definitions.
m4_define([m4_ifblank],
[m4_if(m4_translit([[$1]], [ ][ ][
]), [], [$2], [$3])])
m4_define([m4_ifnblank],
[m4_if(m4_translit([[$1]], [ ][ ][
]), [], [$3], [$2])])
# m4_ifval(COND, [IF-TRUE], [IF-FALSE])
# -------------------------------------
# If COND is not the empty string, expand IF-TRUE, otherwise IF-FALSE.
# Comparable to m4_ifdef.
m4_define([m4_ifval],
[m4_if([$1], [], [$3], [$2])])
# m4_n(TEXT)
# ----------
# If TEXT is not empty, return TEXT and a new line, otherwise nothing.
m4_define([m4_n],
[m4_if([$1],
[], [],
[$1
])])
# m4_ifvaln(COND, [IF-TRUE], [IF-FALSE])
# --------------------------------------
# Same as `m4_ifval', but add an extra newline to IF-TRUE or IF-FALSE
# unless that argument is empty.
m4_define([m4_ifvaln],
[m4_if([$1],
[], [m4_n([$3])],
[m4_n([$2])])])
# m4_ifset(MACRO, [IF-TRUE], [IF-FALSE])
# --------------------------------------
# If MACRO has no definition, or of its definition is the empty string,
# expand IF-FALSE, otherwise IF-TRUE.
m4_define([m4_ifset],
[m4_ifdef([$1],
[m4_ifval(_m4_defn([$1]), [$2], [$3])],
[$3])])
# m4_ifndef(NAME, [IF-NOT-DEFINED], [IF-DEFINED])
# -----------------------------------------------
m4_define([m4_ifndef],
[m4_ifdef([$1], [$3], [$2])])
# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
# -----------------------------------------------------------
# m4 equivalent of
# switch (SWITCH)
# {
# case VAL1:
# IF-VAL1;
# break;
# case VAL2:
# IF-VAL2;
# break;
# ...
# default:
# DEFAULT;
# break;
# }.
# All the values are optional, and the macro is robust to active
# symbols properly quoted.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_case],
[m4_if([$#], 0, [],
[$#], 1, [],
[$#], 2, [$2],
[$1], [$2], [$3],
[$0([$1], m4_shift3($@))])])
# m4_bmatch(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
# -----------------------------------------------------
# m4 equivalent of
#
# if (SWITCH =~ RE1)
# VAL1;
# elif (SWITCH =~ RE2)
# VAL2;
# elif ...
# ...
# else
# DEFAULT
#
# All the values are optional, and the macro is robust to active symbols
# properly quoted.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_bmatch],
[m4_if([$#], 0, [m4_fatal([$0: too few arguments: $#])],
[$#], 1, [m4_fatal([$0: too few arguments: $#: $1])],
[$#], 2, [$2],
[m4_if(m4_bregexp([$1], [$2]), -1, [$0([$1], m4_shift3($@))],
[$3])])])
# m4_argn(N, ARGS...)
# -------------------
# Extract argument N (greater than 0) from ARGS. Example:
# m4_define([b], [B])
# m4_argn([2], [a], [b], [c]) => b
#
# Rather than using m4_car(m4_shiftn([$1], $@)), we exploit the fact that
# GNU m4 can directly reference any argument, through an indirect macro.
m4_define([m4_argn],
[m4_assert([0 < $1])]dnl
[m4_pushdef([_$0], [_m4_popdef([_$0])]m4_dquote([$]m4_incr([$1])))_$0($@)])
# m4_car(ARGS...)
# m4_cdr(ARGS...)
# ---------------
# Manipulate m4 lists. m4_car returns the first argument. m4_cdr
# bundles all but the first argument into a quoted list. These two
# macros are generally used with list arguments, with quoting removed
# to break the list into multiple m4 ARGS.
m4_define([m4_car], [[$1]])
m4_define([m4_cdr],
[m4_if([$#], 0, [m4_fatal([$0: cannot be called without arguments])],
[$#], 1, [],
[m4_dquote(m4_shift($@))])])
# _m4_cdr(ARGS...)
# ----------------
# Like m4_cdr, except include a leading comma unless only one argument
# remains. Why? Because comparing a large list against [] is more
# expensive in expansion time than comparing the number of arguments; so
# _m4_cdr can be used to reduce the number of arguments when it is time
# to end recursion.
m4_define([_m4_cdr],
[m4_if([$#], 1, [],
[, m4_dquote(m4_shift($@))])])
# m4_cond(TEST1, VAL1, IF-VAL1, TEST2, VAL2, IF-VAL2, ..., [DEFAULT])
# -------------------------------------------------------------------
# Similar to m4_if, except that each TEST is expanded when encountered.
# If the expansion of TESTn matches the string VALn, the result is IF-VALn.
# The result is DEFAULT if no tests passed. This macro allows
# short-circuiting of expensive tests, where it pays to arrange quick
# filter tests to run first.
#
# For an example, consider a previous implementation of _AS_QUOTE_IFELSE:
#
# m4_if(m4_index([$1], [\]), [-1], [$2],
# m4_eval(m4_index([$1], [\\]) >= 0), [1], [$2],
# m4_eval(m4_index([$1], [\$]) >= 0), [1], [$2],
# m4_eval(m4_index([$1], [\`]) >= 0), [1], [$3],
# m4_eval(m4_index([$1], [\"]) >= 0), [1], [$3],
# [$2])
#
# Here, m4_index is computed 5 times, and m4_eval 4, even if $1 contains
# no backslash. It is more efficient to do:
#
# m4_cond([m4_index([$1], [\])], [-1], [$2],
# [m4_eval(m4_index([$1], [\\]) >= 0)], [1], [$2],
# [m4_eval(m4_index([$1], [\$]) >= 0)], [1], [$2],
# [m4_eval(m4_index([$1], [\`]) >= 0)], [1], [$3],
# [m4_eval(m4_index([$1], [\"]) >= 0)], [1], [$3],
# [$2])
#
# In the common case of $1 with no backslash, only one m4_index expansion
# occurs, and m4_eval is avoided altogether.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_cond],
[m4_if([$#], [0], [m4_fatal([$0: cannot be called without arguments])],
[$#], [1], [$1],
m4_eval([$# % 3]), [2], [m4_fatal([$0: missing an argument])],
[_$0($@)])])
m4_define([_m4_cond],
[m4_if(($1), [($2)], [$3],
[$#], [3], [],
[$#], [4], [$4],
[$0(m4_shift3($@))])])
## ---------------------------------------- ##
## 6. Enhanced version of some primitives. ##
## ---------------------------------------- ##
# m4_bpatsubsts(STRING, RE1, SUBST1, RE2, SUBST2, ...)
# ----------------------------------------------------
# m4 equivalent of
#
# $_ = STRING;
# s/RE1/SUBST1/g;
# s/RE2/SUBST2/g;
# ...
#
# All the values are optional, and the macro is robust to active symbols
# properly quoted.
#
# I would have liked to name this macro `m4_bpatsubst', unfortunately,
# due to quotation problems, I need to double quote $1 below, therefore
# the anchors are broken :( I can't let users be trapped by that.
#
# Recall that m4_shift3 always results in an argument. Hence, we need
# to distinguish between a final deletion vs. ending recursion.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_bpatsubsts],
[m4_if([$#], 0, [m4_fatal([$0: too few arguments: $#])],
[$#], 1, [m4_fatal([$0: too few arguments: $#: $1])],
[$#], 2, [m4_unquote(m4_builtin([patsubst], [[$1]], [$2]))],
[$#], 3, [m4_unquote(m4_builtin([patsubst], [[$1]], [$2], [$3]))],
[_$0($@m4_if(m4_eval($# & 1), 0, [,]))])])
m4_define([_m4_bpatsubsts],
[m4_if([$#], 2, [$1],
[$0(m4_builtin([patsubst], [[$1]], [$2], [$3]),
m4_shift3($@))])])
# m4_copy(SRC, DST)
# -----------------
# Define the pushdef stack DST as a copy of the pushdef stack SRC;
# give an error if DST is already defined. This is particularly nice
# for copying self-modifying pushdef stacks, where the top definition
# includes one-shot initialization that is later popped to the normal
# definition. This version intentionally does nothing if SRC is
# undefined.
#
# Some macros simply can't be renamed with this method: namely, anything
# involved in the implementation of m4_stack_foreach_sep.
m4_define([m4_copy],
[m4_ifdef([$2], [m4_fatal([$0: won't overwrite defined macro: $2])],
[m4_stack_foreach_sep([$1], [m4_pushdef([$2],], [)])])]dnl
[m4_ifdef([m4_location($1)], [m4_define([m4_location($2)], m4_location)])])
# m4_copy_force(SRC, DST)
# m4_rename_force(SRC, DST)
# -------------------------
# Like m4_copy/m4_rename, except blindly overwrite any existing DST.
# Note that m4_copy_force tolerates undefined SRC, while m4_rename_force
# does not.
m4_define([m4_copy_force],
[m4_ifdef([$2], [_m4_undefine([$2])])m4_copy($@)])
m4_define([m4_rename_force],
[m4_ifdef([$2], [_m4_undefine([$2])])m4_rename($@)])
# m4_define_default(MACRO, VALUE)
# -------------------------------
# If MACRO is undefined, set it to VALUE.
m4_define([m4_define_default],
[m4_ifndef([$1], [m4_define($@)])])
# m4_default(EXP1, EXP2)
# m4_default_nblank(EXP1, EXP2)
# -----------------------------
# Returns EXP1 if not empty/blank, otherwise EXP2. Expand the result.
#
# m4_default is called on hot paths, so inline the contents of m4_ifval,
# for one less round of expansion.
m4_define([m4_default],
[m4_if([$1], [], [$2], [$1])])
m4_define([m4_default_nblank],
[m4_ifblank([$1], [$2], [$1])])
# m4_default_quoted(EXP1, EXP2)
# m4_default_nblank_quoted(EXP1, EXP2)
# ------------------------------------
# Returns EXP1 if non empty/blank, otherwise EXP2. Leave the result quoted.
#
# For comparison:
# m4_define([active], [ACTIVE])
# m4_default([active], [default]) => ACTIVE
# m4_default([], [active]) => ACTIVE
# -m4_default([ ], [active])- => - -
# -m4_default_nblank([ ], [active])- => -ACTIVE-
# m4_default_quoted([active], [default]) => active
# m4_default_quoted([], [active]) => active
# -m4_default_quoted([ ], [active])- => - -
# -m4_default_nblank_quoted([ ], [active])- => -active-
#
# m4_default macro is called on hot paths, so inline the contents of m4_ifval,
# for one less round of expansion.
m4_define([m4_default_quoted],
[m4_if([$1], [], [[$2]], [[$1]])])
m4_define([m4_default_nblank_quoted],
[m4_ifblank([$1], [[$2]], [[$1]])])
# m4_defn(NAME)
# -------------
# Like the original, except guarantee a warning when using something which is
# undefined (unlike M4 1.4.x). This replacement is not a full-featured
# replacement: if any of the defined macros contain unbalanced quoting, but
# when pasted together result in a well-quoted string, then only native m4
# support is able to get it correct. But that's where quadrigraphs come in
# handy, if you really need unbalanced quotes inside your macros.
#
# This macro is called frequently, so minimize the amount of additional
# expansions by skipping m4_ifndef. Better yet, if __m4_version__ exists,
# (added in M4 1.6), then let m4 do the job for us (see m4_init).
m4_define([m4_defn],
[m4_if([$#], [0], [[$0]],
[$#], [1], [m4_ifdef([$1], [_m4_defn([$1])],
[m4_fatal([$0: undefined macro: $1])])],
[m4_map_args([$0], $@)])])
# m4_dumpdef(NAME...)
# -------------------
# In m4 1.4.x, dumpdef writes to the current debugfile, rather than
# stderr. This in turn royally confuses autom4te; so we follow the
# lead of newer m4 and always dump to stderr. Unlike the original,
# this version requires an argument, since there is no convenient way
# in m4 1.4.x to grab the names of all defined macros. Newer m4
# always dumps to stderr, regardless of the current debugfile; it also
# provides m4symbols as a way to grab all current macro names. But
# dumpdefs is not frequently called, so we don't need to worry about
# conditionally using these newer features. Also, this version
# doesn't sort multiple arguments.
#
# If we detect m4 1.6 or newer, then provide an alternate definition,
# installed during m4_init, that allows builtins through.
# Unfortunately, there is no nice way in m4 1.4.x to dump builtins.
m4_define([m4_dumpdef],
[m4_if([$#], [0], [m4_fatal([$0: missing argument])],
[$#], [1], [m4_ifdef([$1], [m4_errprintn(
[$1: ]m4_dquote(_m4_defn([$1])))], [m4_fatal([$0: undefined macro: $1])])],
[m4_map_args([$0], $@)])])
m4_define([_m4_dumpdef],
[m4_if([$#], [0], [m4_fatal([$0: missing argument])],
[$#], [1], [m4_builtin([dumpdef], [$1])],
[m4_map_args_sep([m4_builtin([dumpdef],], [)], [], $@)])])
# m4_dumpdefs(NAME...)
# --------------------
# Similar to `m4_dumpdef(NAME)', but if NAME was m4_pushdef'ed, display its
# value stack (most recent displayed first). Also, this version silently
# ignores undefined macros, rather than erroring out.
#
# This macro cheats, because it relies on the current definition of NAME
# while the second argument of m4_stack_foreach_lifo is evaluated (which
# would be undefined according to the API).
m4_define([m4_dumpdefs],
[m4_if([$#], [0], [m4_fatal([$0: missing argument])],
[$#], [1], [m4_stack_foreach_lifo([$1], [m4_dumpdef([$1])m4_ignore])],
[m4_map_args([$0], $@)])])
# m4_esyscmd_s(COMMAND)
# ---------------------
# Like m4_esyscmd, except strip any trailing newlines, thus behaving
# more like shell command substitution.
m4_define([m4_esyscmd_s],
[m4_chomp_all(m4_esyscmd([$1]))])
# m4_popdef(NAME)
# ---------------
# Like the original, except guarantee a warning when using something which is
# undefined (unlike M4 1.4.x).
#
# This macro is called frequently, so minimize the amount of additional
# expansions by skipping m4_ifndef. Better yet, if __m4_version__ exists,
# (added in M4 1.6), then let m4 do the job for us (see m4_init).
m4_define([m4_popdef],
[m4_if([$#], [0], [[$0]],
[$#], [1], [m4_ifdef([$1], [_m4_popdef([$1])],
[m4_fatal([$0: undefined macro: $1])])],
[m4_map_args([$0], $@)])])
# m4_shiftn(N, ...)
# -----------------
# Returns ... shifted N times. Useful for recursive "varargs" constructs.
#
# Autoconf does not use this macro, because it is inherently slower than
# calling the common cases of m4_shift2 or m4_shift3 directly. But it
# might as well be fast for other clients, such as Libtool. One way to
# do this is to expand $@ only once in _m4_shiftn (otherwise, for long
# lists, the expansion of m4_if takes twice as much memory as what the
# list itself occupies, only to throw away the unused branch). The end
# result is strictly equivalent to
# m4_if([$1], 1, [m4_shift(,m4_shift(m4_shift($@)))],
# [_m4_shiftn(m4_decr([$1]), m4_shift(m4_shift($@)))])
# but with the final `m4_shift(m4_shift($@)))' shared between the two
# paths. The first leg uses a no-op m4_shift(,$@) to balance out the ().
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_shiftn],
[m4_assert(0 < $1 && $1 < $#)_$0($@)])
m4_define([_m4_shiftn],
[m4_if([$1], 1, [m4_shift(],
[$0(m4_decr([$1])]), m4_shift(m4_shift($@)))])
# m4_shift2(...)
# m4_shift3(...)
# --------------
# Returns ... shifted twice, and three times. Faster than m4_shiftn.
m4_define([m4_shift2], [m4_shift(m4_shift($@))])
m4_define([m4_shift3], [m4_shift(m4_shift(m4_shift($@)))])
# _m4_shift2(...)
# _m4_shift3(...)
# ---------------
# Like m4_shift2 or m4_shift3, except include a leading comma unless shifting
# consumes all arguments. Why? Because in recursion, it is nice to
# distinguish between 1 element left and 0 elements left, based on how many
# arguments this shift expands to.
m4_define([_m4_shift2],
[m4_if([$#], [2], [],
[, m4_shift(m4_shift($@))])])
m4_define([_m4_shift3],
[m4_if([$#], [3], [],
[, m4_shift(m4_shift(m4_shift($@)))])])
# m4_undefine(NAME)
# -----------------
# Like the original, except guarantee a warning when using something which is
# undefined (unlike M4 1.4.x).
#
# This macro is called frequently, so minimize the amount of additional
# expansions by skipping m4_ifndef. Better yet, if __m4_version__ exists,
# (added in M4 1.6), then let m4 do the job for us (see m4_init).
m4_define([m4_undefine],
[m4_if([$#], [0], [[$0]],
[$#], [1], [m4_ifdef([$1], [_m4_undefine([$1])],
[m4_fatal([$0: undefined macro: $1])])],
[m4_map_args([$0], $@)])])
# _m4_wrap(PRE, POST)
# -------------------
# Helper macro for m4_wrap and m4_wrap_lifo. Allows nested calls to
# m4_wrap within wrapped text. Use _m4_defn and _m4_popdef for speed.
m4_define([_m4_wrap],
[m4_ifdef([$0_text],
[m4_define([$0_text], [$1]_m4_defn([$0_text])[$2])],
[m4_builtin([m4wrap], [m4_unquote(
_m4_defn([$0_text])_m4_popdef([$0_text]))])m4_define([$0_text], [$1$2])])])
# m4_wrap(TEXT)
# -------------
# Append TEXT to the list of hooks to be executed at the end of input.
# Whereas the order of the original may be LIFO in the underlying m4,
# this version is always FIFO.
m4_define([m4_wrap],
[_m4_wrap([], [$1[]])])
# m4_wrap_lifo(TEXT)
# ------------------
# Prepend TEXT to the list of hooks to be executed at the end of input.
# Whereas the order of m4_wrap may be FIFO in the underlying m4, this
# version is always LIFO.
m4_define([m4_wrap_lifo],
[_m4_wrap([$1[]])])
## ------------------------- ##
## 7. Quoting manipulation. ##
## ------------------------- ##
# m4_apply(MACRO, LIST)
# ---------------------
# Invoke MACRO, with arguments provided from the quoted list of
# comma-separated quoted arguments. If LIST is empty, invoke MACRO
# without arguments. The expansion will not be concatenated with
# subsequent text.
m4_define([m4_apply],
[m4_if([$2], [], [$1], [$1($2)])[]])
# _m4_apply(MACRO, LIST)
# ----------------------
# Like m4_apply, except do nothing if LIST is empty.
m4_define([_m4_apply],
[m4_if([$2], [], [], [$1($2)[]])])
# m4_count(ARGS)
# --------------
# Return a count of how many ARGS are present.
m4_define([m4_count], [$#])
# m4_curry(MACRO, ARG...)
# -----------------------
# Perform argument currying. The expansion of this macro is another
# macro that takes exactly one argument, appends it to the end of the
# original ARG list, then invokes MACRO. For example:
# m4_curry([m4_curry], [m4_reverse], [1])([2])([3]) => 3, 2, 1
# Not quite as practical as m4_incr, but you could also do:
# m4_define([add], [m4_eval(([$1]) + ([$2]))])
# m4_define([add_one], [m4_curry([add], [1])])
# add_one()([2]) => 3
m4_define([m4_curry], [$1(m4_shift($@,)_$0])
m4_define([_m4_curry], [[$1])])
# m4_do(STRING, ...)
# ------------------
# This macro invokes all its arguments (in sequence, of course). It is
# useful for making your macros more structured and readable by dropping
# unnecessary dnl's and have the macros indented properly. No concatenation
# occurs after a STRING; use m4_unquote(m4_join(,STRING)) for that.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_do],
[m4_if([$#], 0, [],
[$#], 1, [$1[]],
[$1[]$0(m4_shift($@))])])
# m4_dquote(ARGS)
# ---------------
# Return ARGS as a quoted list of quoted arguments.
m4_define([m4_dquote], [[$@]])
# m4_dquote_elt(ARGS)
# -------------------
# Return ARGS as an unquoted list of double-quoted arguments.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_dquote_elt],
[m4_if([$#], [0], [],
[$#], [1], [[[$1]]],
[[[$1]],$0(m4_shift($@))])])
# m4_echo(ARGS)
# -------------
# Return the ARGS, with the same level of quoting. Whitespace after
# unquoted commas are consumed.
m4_define([m4_echo], [$@])
# m4_expand(ARG)
# _m4_expand(ARG)
# ---------------
# Return the expansion of ARG as a single string. Unlike
# m4_quote($1), this preserves whitespace following single-quoted
# commas that appear within ARG. It also deals with shell case
# statements.
#
# m4_define([active], [ACT, IVE])
# m4_define([active2], [[ACT, IVE]])
# m4_quote(active, active2)
# => ACT,IVE,ACT, IVE
# m4_expand([active, active2])
# => ACT, IVE, ACT, IVE
#
# Unfortunately, due to limitations in m4, ARG must expand to
# something with balanced quotes (use quadrigraphs to get around
# this), and should not contain the unlikely delimiters -=<{( or
# )}>=-. It is possible to have unbalanced quoted `(' or `)', as well
# as unbalanced unquoted `)'. m4_expand can handle unterminated
# comments or dnl on the final line, at the expense of speed; it also
# aids in detecting attempts to incorrectly change the current
# diversion inside ARG. Meanwhile, _m4_expand is faster but must be
# given a terminated expansion, and has no safety checks for
# mis-diverted text.
#
# Exploit that extra unquoted () will group unquoted commas and the
# following whitespace. m4_bpatsubst can't handle newlines inside $1,
# and m4_substr strips quoting. So we (ab)use m4_changequote, using
# temporary quotes to remove the delimiters that conveniently included
# the unquoted () that were added prior to the changequote.
#
# Thanks to shell case statements, too many people are prone to pass
# underquoted `)', so we try to detect that by passing a marker as a
# fourth argument; if the marker is not present, then we assume that
# we encountered an early `)', and re-expand the first argument, but
# this time with one more `(' in the second argument and in the
# open-quote delimiter. We must also ignore the slop from the
# previous try. The final macro is thus half line-noise, half art.
m4_define([m4_expand],
[m4_pushdef([m4_divert], _m4_defn([_m4_divert_unsafe]))]dnl
[m4_pushdef([m4_divert_push], _m4_defn([_m4_divert_unsafe]))]dnl
[m4_chomp(_$0([$1
]))_m4_popdef([m4_divert], [m4_divert_push])])
m4_define([_m4_expand], [$0_([$1], [(], -=<{($1)}>=-, [}>=-])])
m4_define([_m4_expand_],
[m4_if([$4], [}>=-],
[m4_changequote([-=<{$2], [)}>=-])$3m4_changequote([, ])],
[$0([$1], [($2], -=<{($2$1)}>=-, [}>=-])m4_ignore$2])])
# m4_ignore(ARGS)
# ---------------
# Expands to nothing. Useful for conditionally ignoring an arbitrary
# number of arguments (see _m4_list_cmp for an example).
m4_define([m4_ignore])
# m4_make_list(ARGS)
# ------------------
# Similar to m4_dquote, this creates a quoted list of quoted ARGS. This
# version is less efficient than m4_dquote, but separates each argument
# with a comma and newline, rather than just comma, for readability.
# When developing an m4sugar algorithm, you could temporarily use
# m4_pushdef([m4_dquote],m4_defn([m4_make_list]))
# around your code to make debugging easier.
m4_define([m4_make_list], [m4_join([,
], m4_dquote_elt($@))])
# m4_noquote(STRING)
# ------------------
# Return the result of ignoring all quotes in STRING and invoking the
# macros it contains. Among other things, this is useful for enabling
# macro invocations inside strings with [] blocks (for instance regexps
# and help-strings). On the other hand, since all quotes are disabled,
# any macro expanded during this time that relies on nested [] quoting
# will likely crash and burn. This macro is seldom useful; consider
# m4_unquote or m4_expand instead.
m4_define([m4_noquote],
[m4_changequote([-=<{(],[)}>=-])$1-=<{()}>=-m4_changequote([,])])
# m4_quote(ARGS)
# --------------
# Return ARGS as a single argument. Any whitespace after unquoted commas
# is stripped. There is always output, even when there were no arguments.
#
# It is important to realize the difference between `m4_quote(exp)' and
# `[exp]': in the first case you obtain the quoted *result* of the
# expansion of EXP, while in the latter you just obtain the string
# `exp'.
m4_define([m4_quote], [[$*]])
# _m4_quote(ARGS)
# ---------------
# Like m4_quote, except that when there are no arguments, there is no
# output. For conditional scenarios (such as passing _m4_quote as the
# macro name in m4_mapall), this feature can be used to distinguish between
# one argument of the empty string vs. no arguments. However, in the
# normal case with arguments present, this is less efficient than m4_quote.
m4_define([_m4_quote],
[m4_if([$#], [0], [], [[$*]])])
# m4_reverse(ARGS)
# ----------------
# Output ARGS in reverse order.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_reverse],
[m4_if([$#], [0], [], [$#], [1], [[$1]],
[$0(m4_shift($@)), [$1]])])
# m4_unquote(ARGS)
# ----------------
# Remove one layer of quotes from each ARG, performing one level of
# expansion. For one argument, m4_unquote([arg]) is more efficient than
# m4_do([arg]), but for multiple arguments, the difference is that
# m4_unquote separates arguments with commas while m4_do concatenates.
# Follow this macro with [] if concatenation with subsequent text is
# undesired.
m4_define([m4_unquote], [$*])
## -------------------------- ##
## 8. Implementing m4 loops. ##
## -------------------------- ##
# m4_for(VARIABLE, FIRST, LAST, [STEP = +/-1], EXPRESSION)
# --------------------------------------------------------
# Expand EXPRESSION defining VARIABLE to FROM, FROM + 1, ..., TO with
# increments of STEP. Both limits are included, and bounds are
# checked for consistency. The algorithm is robust to indirect
# VARIABLE names. Changing VARIABLE inside EXPRESSION will not impact
# the number of iterations.
#
# Uses _m4_defn for speed, and avoid dnl in the macro body. Factor
# the _m4_for call so that EXPRESSION is only parsed once.
m4_define([m4_for],
[m4_pushdef([$1], m4_eval([$2]))]dnl
[m4_cond([m4_eval(([$3]) > ([$2]))], 1,
[m4_pushdef([_m4_step], m4_eval(m4_default_quoted([$4],
1)))m4_assert(_m4_step > 0)_$0(_m4_defn([$1]),
m4_eval((([$3]) - ([$2])) / _m4_step * _m4_step + ([$2])), _m4_step,],
[m4_eval(([$3]) < ([$2]))], 1,
[m4_pushdef([_m4_step], m4_eval(m4_default_quoted([$4],
-1)))m4_assert(_m4_step < 0)_$0(_m4_defn([$1]),
m4_eval((([$2]) - ([$3])) / -(_m4_step) * _m4_step + ([$2])), _m4_step,],
[m4_pushdef([_m4_step])_$0(_m4_defn([$1]), _m4_defn([$1]), 0,])]dnl
[[m4_define([$1],], [)$5])m4_popdef([_m4_step], [$1])])
# _m4_for(COUNT, LAST, STEP, PRE, POST)
# -------------------------------------
# Core of the loop, no consistency checks, all arguments are plain
# numbers. Expand PRE[COUNT]POST, then alter COUNT by STEP and
# iterate if COUNT is not LAST.
m4_define([_m4_for],
[$4[$1]$5[]m4_if([$1], [$2], [],
[$0(m4_eval([$1 + $3]), [$2], [$3], [$4], [$5])])])
# Implementing `foreach' loops in m4 is much more tricky than it may
# seem. For example, the old M4 1.4.4 manual had an incorrect example,
# which looked like this (when translated to m4sugar):
#
# | # foreach(VAR, (LIST), STMT)
# | m4_define([foreach],
# | [m4_pushdef([$1])_foreach([$1], [$2], [$3])m4_popdef([$1])])
# | m4_define([_arg1], [$1])
# | m4_define([_foreach],
# | [m4_if([$2], [()], ,
# | [m4_define([$1], _arg1$2)$3[]_foreach([$1], (m4_shift$2), [$3])])])
#
# But then if you run
#
# | m4_define(a, 1)
# | m4_define(b, 2)
# | m4_define(c, 3)
# | foreach([f], [([a], [(b], [c)])], [echo f
# | ])
#
# it gives
#
# => echo 1
# => echo (2,3)
#
# which is not what is expected.
#
# Of course the problem is that many quotes are missing. So you add
# plenty of quotes at random places, until you reach the expected
# result. Alternatively, if you are a quoting wizard, you directly
# reach the following implementation (but if you really did, then
# apply to the maintenance of m4sugar!).
#
# | # foreach(VAR, (LIST), STMT)
# | m4_define([foreach], [m4_pushdef([$1])_foreach($@)m4_popdef([$1])])
# | m4_define([_arg1], [[$1]])
# | m4_define([_foreach],
# | [m4_if($2, [()], ,
# | [m4_define([$1], [_arg1$2])$3[]_foreach([$1], [(m4_shift$2)], [$3])])])
#
# which this time answers
#
# => echo a
# => echo (b
# => echo c)
#
# Bingo!
#
# Well, not quite.
#
# With a better look, you realize that the parens are more a pain than
# a help: since anyway you need to quote properly the list, you end up
# with always using an outermost pair of parens and an outermost pair
# of quotes. Rejecting the parens both eases the implementation, and
# simplifies the use:
#
# | # foreach(VAR, (LIST), STMT)
# | m4_define([foreach], [m4_pushdef([$1])_foreach($@)m4_popdef([$1])])
# | m4_define([_arg1], [$1])
# | m4_define([_foreach],
# | [m4_if($2, [], ,
# | [m4_define([$1], [_arg1($2)])$3[]_foreach([$1], [m4_shift($2)], [$3])])])
#
#
# Now, just replace the `$2' with `m4_quote($2)' in the outer `m4_if'
# to improve robustness, and you come up with a nice implementation
# that doesn't require extra parentheses in the user's LIST.
#
# But wait - now the algorithm is quadratic, because every recursion of
# the algorithm keeps the entire LIST and merely adds another m4_shift to
# the quoted text. If the user has a lot of elements in LIST, you can
# bring the system to its knees with the memory m4 then requires, or trip
# the m4 --nesting-limit recursion factor. The only way to avoid
# quadratic growth is ensure m4_shift is expanded prior to the recursion.
# Hence the design below.
#
# The M4 manual now includes a chapter devoted to this issue, with
# the lessons learned from m4sugar. And still, this design is only
# optimal for M4 1.6; see foreach.m4 for yet more comments on why
# M4 1.4.x uses yet another implementation.
# m4_foreach(VARIABLE, LIST, EXPRESSION)
# --------------------------------------
#
# Expand EXPRESSION assigning each value of the LIST to VARIABLE.
# LIST should have the form `item_1, item_2, ..., item_n', i.e. the
# whole list must *quoted*. Quote members too if you don't want them
# to be expanded.
#
# This macro is robust to active symbols:
# | m4_define(active, [ACT, IVE])
# | m4_foreach(Var, [active, active], [-Var-])
# => -ACT--IVE--ACT--IVE-
#
# | m4_foreach(Var, [[active], [active]], [-Var-])
# => -ACT, IVE--ACT, IVE-
#
# | m4_foreach(Var, [[[active]], [[active]]], [-Var-])
# => -active--active-
#
# This macro is called frequently, so avoid extra expansions such as
# m4_ifval and dnl. Also, since $2 might be quite large, try to use it
# as little as possible in _m4_foreach; each extra use requires that much
# more memory for expansion. So, rather than directly compare $2 against
# [] and use m4_car/m4_cdr for recursion, we instead unbox the list (which
# requires swapping the argument order in the helper), insert an ignored
# third argument, and use m4_shift3 to detect when recursion is complete,
# at which point this looks very much like m4_map_args.
m4_define([m4_foreach],
[m4_if([$2], [], [],
[m4_pushdef([$1])_$0([m4_define([$1],], [)$3], [],
$2)m4_popdef([$1])])])
# _m4_foreach(PRE, POST, IGNORED, ARG...)
# ---------------------------------------
# Form the common basis of the m4_foreach and m4_map macros. For each
# ARG, expand PRE[ARG]POST[]. The IGNORED argument makes recursion
# easier, and must be supplied rather than implicit.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([_m4_foreach],
[m4_if([$#], [3], [],
[$1[$4]$2[]$0([$1], [$2], m4_shift3($@))])])
# m4_foreach_w(VARIABLE, LIST, EXPRESSION)
# ----------------------------------------
# Like m4_foreach, but the list is whitespace separated. Depending on
# EXPRESSION, it may be more efficient to use m4_map_args_w.
#
# This macro is robust to active symbols:
# m4_foreach_w([Var], [ active
# b act\
# ive ], [-Var-])end
# => -active--b--active-end
#
# This used to use a slower implementation based on m4_foreach:
# m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])
m4_define([m4_foreach_w],
[m4_pushdef([$1])m4_map_args_w([$2],
[m4_define([$1],], [)$3])m4_popdef([$1])])
# m4_map(MACRO, LIST)
# m4_mapall(MACRO, LIST)
# ----------------------
# Invoke MACRO($1), MACRO($2) etc. where $1, $2... are the elements of
# LIST. $1, $2... must in turn be lists, appropriate for m4_apply.
# If LIST contains an empty sublist, m4_map skips the expansion of
# MACRO, while m4_mapall expands MACRO with no arguments.
#
# Since LIST may be quite large, we want to minimize how often it
# appears in the expansion. Rather than use m4_car/m4_cdr iteration,
# we unbox the list, and use _m4_foreach for iteration. For m4_map,
# an empty list behaves like an empty sublist and gets ignored; for
# m4_mapall, we must special-case the empty list.
m4_define([m4_map],
[_m4_foreach([_m4_apply([$1],], [)], [], $2)])
m4_define([m4_mapall],
[m4_if([$2], [], [],
[_m4_foreach([m4_apply([$1],], [)], [], $2)])])
# m4_map_sep(MACRO, [SEPARATOR], LIST)
# m4_mapall_sep(MACRO, [SEPARATOR], LIST)
# ---------------------------------------
# Invoke MACRO($1), SEPARATOR, MACRO($2), ..., MACRO($N) where $1,
# $2... $N are the elements of LIST, and are in turn lists appropriate
# for m4_apply. SEPARATOR is expanded, in order to allow the creation
# of a list of arguments by using a single-quoted comma as the
# separator. For each empty sublist, m4_map_sep skips the expansion
# of MACRO and SEPARATOR, while m4_mapall_sep expands MACRO with no
# arguments.
#
# For m4_mapall_sep, merely expand the first iteration without the
# separator, then include separator as part of subsequent recursion;
# but avoid extra expansion of LIST's side-effects via a helper macro.
# For m4_map_sep, things are trickier - we don't know if the first
# list element is an empty sublist, so we must define a self-modifying
# helper macro and use that as the separator instead.
m4_define([m4_map_sep],
[m4_pushdef([m4_Sep], [m4_define([m4_Sep], _m4_defn([m4_unquote]))])]dnl
[_m4_foreach([_m4_apply([m4_Sep([$2])[]$1],], [)], [], $3)m4_popdef([m4_Sep])])
m4_define([m4_mapall_sep],
[m4_if([$3], [], [], [_$0([$1], [$2], $3)])])
m4_define([_m4_mapall_sep],
[m4_apply([$1], [$3])_m4_foreach([m4_apply([$2[]$1],], [)], m4_shift2($@))])
# m4_map_args(EXPRESSION, ARG...)
# -------------------------------
# Expand EXPRESSION([ARG]) for each argument. More efficient than
# m4_foreach([var], [ARG...], [EXPRESSION(m4_defn([var]))])
# Shorthand for m4_map_args_sep([EXPRESSION(], [)], [], ARG...).
m4_define([m4_map_args],
[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
[$#], [1], [],
[$#], [2], [$1([$2])[]],
[_m4_foreach([$1(], [)], $@)])])
# m4_map_args_pair(EXPRESSION, [END-EXPR = EXPRESSION], ARG...)
# -------------------------------------------------------------
# Perform a pairwise grouping of consecutive ARGs, by expanding
# EXPRESSION([ARG1], [ARG2]). If there are an odd number of ARGs, the
# final argument is expanded with END-EXPR([ARGn]).
#
# For example:
# m4_define([show], [($*)m4_newline])dnl
# m4_map_args_pair([show], [], [a], [b], [c], [d], [e])dnl
# => (a,b)
# => (c,d)
# => (e)
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_map_args_pair],
[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
[$#], [1], [m4_fatal([$0: too few arguments: $#: $1])],
[$#], [2], [],
[$#], [3], [m4_default([$2], [$1])([$3])[]],
[$#], [4], [$1([$3], [$4])[]],
[$1([$3], [$4])[]$0([$1], [$2], m4_shift(m4_shift3($@)))])])
# m4_map_args_sep([PRE], [POST], [SEP], ARG...)
# ---------------------------------------------
# Expand PRE[ARG]POST for each argument, with SEP between arguments.
m4_define([m4_map_args_sep],
[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
[$#], [1], [],
[$#], [2], [],
[$#], [3], [],
[$#], [4], [$1[$4]$2[]],
[$1[$4]$2[]_m4_foreach([$3[]$1], [$2], m4_shift3($@))])])
# m4_map_args_w(STRING, [PRE], [POST], [SEP])
# -------------------------------------------
# Perform the expansion of PRE[word]POST[] for each word in STRING
# separated by whitespace. More efficient than:
# m4_foreach_w([var], [STRING], [PRE[]m4_defn([var])POST])
# Additionally, expand SEP between words.
#
# As long as we have to use m4_bpatsubst to split the string, we might
# as well make it also apply PRE and POST; this avoids iteration
# altogether. But we must be careful of any \ in PRE or POST.
# _m4_strip returns a quoted string, but that's okay, since it also
# supplies an empty leading and trailing argument due to our
# intentional whitespace around STRING. We use m4_substr to strip the
# empty elements and remove the extra layer of quoting.
m4_define([m4_map_args_w],
[_$0(_m4_split([ ]m4_flatten([$1])[ ], [[ ]+],
m4_if(m4_index([$2$3$4], [\]), [-1], [[$3[]$4[]$2]],
[m4_bpatsubst([[$3[]$4[]$2]], [\\], [\\\\])])),
m4_len([[]$3[]$4]), m4_len([$4[]$2[]]))])
m4_define([_m4_map_args_w],
[m4_substr([$1], [$2], m4_eval(m4_len([$1]) - [$2] - [$3]))])
# m4_stack_foreach(MACRO, FUNC)
# m4_stack_foreach_lifo(MACRO, FUNC)
# ----------------------------------
# Pass each stacked definition of MACRO to the one-argument macro FUNC.
# m4_stack_foreach proceeds in FIFO order, while m4_stack_foreach_lifo
# processes the topmost definitions first. In addition, FUNC should
# not push or pop definitions of MACRO, and should not expect anything about
# the active definition of MACRO (it will not be the topmost, and may not
# be the one passed to FUNC either).
#
# Some macros simply can't be examined with this method: namely,
# anything involved in the implementation of _m4_stack_reverse.
m4_define([m4_stack_foreach],
[_m4_stack_reverse([$1], [m4_tmp-$1])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1], [$2(_m4_defn([m4_tmp-$1]))])])
m4_define([m4_stack_foreach_lifo],
[_m4_stack_reverse([$1], [m4_tmp-$1], [$2(_m4_defn([m4_tmp-$1]))])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1])])
# m4_stack_foreach_sep(MACRO, [PRE], [POST], [SEP])
# m4_stack_foreach_sep_lifo(MACRO, [PRE], [POST], [SEP])
# ------------------------------------------------------
# Similar to m4_stack_foreach and m4_stack_foreach_lifo, in that every
# definition of a pushdef stack will be visited. But rather than
# passing the definition as a single argument to a macro, this variant
# expands the concatenation of PRE[]definition[]POST, and expands SEP
# between consecutive expansions. Note that m4_stack_foreach([a], [b])
# is equivalent to m4_stack_foreach_sep([a], [b(], [)]).
m4_define([m4_stack_foreach_sep],
[_m4_stack_reverse([$1], [m4_tmp-$1])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4[]])])
m4_define([m4_stack_foreach_sep_lifo],
[_m4_stack_reverse([$1], [m4_tmp-$1], [$2[]_m4_defn([m4_tmp-$1])$3], [$4[]])]dnl
[_m4_stack_reverse([m4_tmp-$1], [$1])])
# _m4_stack_reverse(OLD, NEW, [ACTION], [SEP])
# --------------------------------------------
# A recursive worker for pushdef stack manipulation. Destructively
# copy the OLD stack into the NEW, and expanding ACTION for each
# iteration. After the first iteration, SEP is promoted to the front
# of ACTION (note that SEP should include a trailing [] if it is to
# avoid interfering with ACTION). The current definition is examined
# after the NEW has been pushed but before OLD has been popped; this
# order is important, as ACTION is permitted to operate on either
# _m4_defn([OLD]) or _m4_defn([NEW]). Since the operation is
# destructive, this macro is generally used twice, with a temporary
# macro name holding the swapped copy.
m4_define([_m4_stack_reverse],
[m4_ifdef([$1], [m4_pushdef([$2],
_m4_defn([$1]))$3[]_m4_popdef([$1])$0([$1], [$2], [$4$3])])])
## --------------------------- ##
## 9. More diversion support. ##
## --------------------------- ##
# m4_cleardivert(DIVERSION-NAME...)
# ---------------------------------
# Discard any text in DIVERSION-NAME.
#
# This works even inside m4_expand.
m4_define([m4_cleardivert],
[m4_if([$#], [0], [m4_fatal([$0: missing argument])],
[_m4_divert_raw([-1])m4_undivert($@)_m4_divert_raw(
_m4_divert(_m4_defn([_m4_divert_diversion]), [-]))])])
# _m4_divert(DIVERSION-NAME or NUMBER, [NOWARN])
# ----------------------------------------------
# If DIVERSION-NAME is the name of a diversion, return its number,
# otherwise if it is a NUMBER return it. Issue a warning about
# the use of a number instead of a name, unless NOWARN is provided.
m4_define([_m4_divert],
[m4_ifdef([_m4_divert($1)],
[m4_indir([_m4_divert($1)])],
[m4_if([$2], [], [m4_warn([syntax],
[prefer named diversions])])$1])])
# KILL is only used to suppress output.
m4_define([_m4_divert(KILL)], -1)
# The empty diversion name is a synonym for 0.
m4_define([_m4_divert()], 0)
# m4_divert_stack
# ---------------
# Print the diversion stack, if it's nonempty. The caller is
# responsible for any leading or trailing newline.
m4_define([m4_divert_stack],
[m4_stack_foreach_sep_lifo([_m4_divert_stack], [], [], [
])])
# m4_divert_stack_push(MACRO-NAME, DIVERSION-NAME)
# ------------------------------------------------
# Form an entry of the diversion stack from caller MACRO-NAME and
# entering DIVERSION-NAME and push it.
m4_define([m4_divert_stack_push],
[m4_pushdef([_m4_divert_stack], m4_location[: $1: $2])])
# m4_divert(DIVERSION-NAME)
# -------------------------
# Change the diversion stream to DIVERSION-NAME.
m4_define([m4_divert],
[m4_popdef([_m4_divert_stack])]dnl
[m4_define([_m4_divert_diversion], [$1])]dnl
[m4_divert_stack_push([$0], [$1])]dnl
[_m4_divert_raw(_m4_divert([$1]))])
# m4_divert_push(DIVERSION-NAME, [NOWARN])
# ----------------------------------------
# Change the diversion stream to DIVERSION-NAME, while stacking old values.
# For internal use only: if NOWARN is not empty, DIVERSION-NAME can be a
# number instead of a name.
m4_define([m4_divert_push],
[m4_divert_stack_push([$0], [$1])]dnl
[m4_pushdef([_m4_divert_diversion], [$1])]dnl
[_m4_divert_raw(_m4_divert([$1], [$2]))])
# m4_divert_pop([DIVERSION-NAME])
# -------------------------------
# Change the diversion stream to its previous value, unstacking it.
# If specified, verify we left DIVERSION-NAME.
# When we pop the last value from the stack, we divert to -1.
m4_define([m4_divert_pop],
[m4_if([$1], [], [],
[$1], _m4_defn([_m4_divert_diversion]), [],
[m4_fatal([$0($1): diversion mismatch:
]m4_divert_stack)])]dnl
[_m4_popdef([_m4_divert_stack], [_m4_divert_diversion])]dnl
[m4_ifdef([_m4_divert_diversion], [],
[m4_fatal([too many m4_divert_pop])])]dnl
[_m4_divert_raw(_m4_divert(_m4_defn([_m4_divert_diversion]), [-]))])
# m4_divert_text(DIVERSION-NAME, CONTENT)
# ---------------------------------------
# Output CONTENT into DIVERSION-NAME (which may be a number actually).
# An end of line is appended for free to CONTENT.
m4_define([m4_divert_text],
[m4_divert_push([$1])$2
m4_divert_pop([$1])])
# m4_divert_once(DIVERSION-NAME, CONTENT)
# ---------------------------------------
# Output CONTENT into DIVERSION-NAME once, if not already there.
# An end of line is appended for free to CONTENT.
m4_define([m4_divert_once],
[m4_expand_once([m4_divert_text([$1], [$2])])])
# _m4_divert_unsafe(DIVERSION-NAME)
# ---------------------------------
# Issue a warning that the attempt to change the current diversion to
# DIVERSION-NAME is unsafe, because this macro is being expanded
# during argument collection of m4_expand.
m4_define([_m4_divert_unsafe],
[m4_fatal([$0: cannot change diversion to `$1' inside m4_expand])])
# m4_undivert(DIVERSION-NAME...)
# ------------------------------
# Undivert DIVERSION-NAME. Unlike the M4 version, this requires at
# least one DIVERSION-NAME; also, due to support for named diversions,
# this should not be used to undivert files.
m4_define([m4_undivert],
[m4_if([$#], [0], [m4_fatal([$0: missing argument])],
[$#], [1], [_m4_undivert(_m4_divert([$1]))],
[m4_map_args([$0], $@)])])
## --------------------------------------------- ##
## 10. Defining macros with bells and whistles. ##
## --------------------------------------------- ##
# `m4_defun' is basically `m4_define' but it equips the macro with the
# needed machinery for `m4_require'. A macro must be m4_defun'd if
# either it is m4_require'd, or it m4_require's.
#
# Two things deserve attention and are detailed below:
# 1. Implementation of m4_require
# 2. Keeping track of the expansion stack
#
# 1. Implementation of m4_require
# ===============================
#
# Of course m4_defun calls m4_provide, so that a macro which has
# been expanded is not expanded again when m4_require'd, but the
# difficult part is the proper expansion of macros when they are
# m4_require'd.
#
# The implementation is based on three ideas, (i) using diversions to
# prepare the expansion of the macro and its dependencies (by Franc,ois
# Pinard), (ii) expand the most recently m4_require'd macros _after_
# the previous macros (by Axel Thimm), and (iii) track instances of
# provide before require (by Eric Blake).
#
#
# The first idea: why use diversions?
# -----------------------------------
#
# When a macro requires another, the other macro is expanded in new
# diversion, GROW. When the outer macro is fully expanded, we first
# undivert the most nested diversions (GROW - 1...), and finally
# undivert GROW. To understand why we need several diversions,
# consider the following example:
#
# | m4_defun([TEST1], [Test...m4_require([TEST2])1])
# | m4_defun([TEST2], [Test...m4_require([TEST3])2])
# | m4_defun([TEST3], [Test...3])
#
# Because m4_require is not required to be first in the outer macros, we
# must keep the expansions of the various levels of m4_require separated.
# Right before executing the epilogue of TEST1, we have:
#
# GROW - 2: Test...3
# GROW - 1: Test...2
# GROW: Test...1
# BODY:
#
# Finally the epilogue of TEST1 undiverts GROW - 2, GROW - 1, and
# GROW into the regular flow, BODY.
#
# GROW - 2:
# GROW - 1:
# GROW:
# BODY: Test...3; Test...2; Test...1
#
# (The semicolons are here for clarification, but of course are not
# emitted.) This is what Autoconf 2.0 (I think) to 2.13 (I'm sure)
# implement.
#
#
# The second idea: first required first out
# -----------------------------------------
#
# The natural implementation of the idea above is buggy and produces
# very surprising results in some situations. Let's consider the
# following example to explain the bug:
#
# | m4_defun([TEST1], [m4_require([TEST2a])m4_require([TEST2b])])
# | m4_defun([TEST2a], [])
# | m4_defun([TEST2b], [m4_require([TEST3])])
# | m4_defun([TEST3], [m4_require([TEST2a])])
# |
# | AC_INIT
# | TEST1
#
# The dependencies between the macros are:
#
# 3 --- 2b
# / \ is m4_require'd by
# / \ left -------------------- right
# 2a ------------ 1
#
# If you strictly apply the rules given in the previous section you get:
#
# GROW - 2: TEST3
# GROW - 1: TEST2a; TEST2b
# GROW: TEST1
# BODY:
#
# (TEST2a, although required by TEST3 is not expanded in GROW - 3
# because is has already been expanded before in GROW - 1, so it has
# been AC_PROVIDE'd, so it is not expanded again) so when you undivert
# the stack of diversions, you get:
#
# GROW - 2:
# GROW - 1:
# GROW:
# BODY: TEST3; TEST2a; TEST2b; TEST1
#
# i.e., TEST2a is expanded after TEST3 although the latter required the
# former.
#
# Starting from 2.50, we use an implementation provided by Axel Thimm.
# The idea is simple: the order in which macros are emitted must be the
# same as the one in which macros are expanded. (The bug above can
# indeed be described as: a macro has been m4_provide'd before its
# dependent, but it is emitted after: the lack of correlation between
# emission and expansion order is guilty).
#
# How to do that? You keep the stack of diversions to elaborate the
# macros, but each time a macro is fully expanded, emit it immediately.
#
# In the example above, when TEST2a is expanded, but it's epilogue is
# not run yet, you have:
#
# GROW - 2:
# GROW - 1: TEST2a
# GROW: Elaboration of TEST1
# BODY:
#
# The epilogue of TEST2a emits it immediately:
#
# GROW - 2:
# GROW - 1:
# GROW: Elaboration of TEST1
# BODY: TEST2a
#
# TEST2b then requires TEST3, so right before the epilogue of TEST3, you
# have:
#
# GROW - 2: TEST3
# GROW - 1: Elaboration of TEST2b
# GROW: Elaboration of TEST1
# BODY: TEST2a
#
# The epilogue of TEST3 emits it:
#
# GROW - 2:
# GROW - 1: Elaboration of TEST2b
# GROW: Elaboration of TEST1
# BODY: TEST2a; TEST3
#
# TEST2b is now completely expanded, and emitted:
#
# GROW - 2:
# GROW - 1:
# GROW: Elaboration of TEST1
# BODY: TEST2a; TEST3; TEST2b
#
# and finally, TEST1 is finished and emitted:
#
# GROW - 2:
# GROW - 1:
# GROW:
# BODY: TEST2a; TEST3; TEST2b: TEST1
#
# The idea is simple, but the implementation is a bit involved. If
# you are like me, you will want to see the actual functioning of this
# implementation to be convinced. The next section gives the full
# details.
#
#
# The Axel Thimm implementation at work
# -------------------------------------
#
# We consider the macros above, and this configure.ac:
#
# AC_INIT
# TEST1
#
# You should keep the definitions of _m4_defun_pro, _m4_defun_epi, and
# m4_require at hand to follow the steps.
#
# This implementation tries not to assume that the current diversion is
# BODY, so as soon as a macro (m4_defun'd) is expanded, we first
# record the current diversion under the name _m4_divert_dump (denoted
# DUMP below for short). This introduces an important difference with
# the previous versions of Autoconf: you cannot use m4_require if you
# are not inside an m4_defun'd macro, and especially, you cannot
# m4_require directly from the top level.
#
# We have not tried to simulate the old behavior (better yet, we
# diagnose it), because it is too dangerous: a macro m4_require'd from
# the top level is expanded before the body of `configure', i.e., before
# any other test was run. I let you imagine the result of requiring
# AC_STDC_HEADERS for instance, before AC_PROG_CC was actually run....
#
# After AC_INIT was run, the current diversion is BODY.
# * AC_INIT was run
# DUMP: undefined
# diversion stack: BODY |-
#
# * TEST1 is expanded
# The prologue of TEST1 sets _m4_divert_dump, which is the diversion
# where the current elaboration will be dumped, to the current
# diversion. It also m4_divert_push to GROW, where the full
# expansion of TEST1 and its dependencies will be elaborated.
# DUMP: BODY
# BODY: empty
# diversions: GROW, BODY |-
#
# * TEST1 requires TEST2a
# _m4_require_call m4_divert_pushes another temporary diversion,
# GROW - 1, and expands TEST2a in there.
# DUMP: BODY
# BODY: empty
# GROW - 1: TEST2a
# diversions: GROW - 1, GROW, BODY |-
# Then the content of the temporary diversion is moved to DUMP and the
# temporary diversion is popped.
# DUMP: BODY
# BODY: TEST2a
# diversions: GROW, BODY |-
#
# * TEST1 requires TEST2b
# Again, _m4_require_call pushes GROW - 1 and heads to expand TEST2b.
# DUMP: BODY
# BODY: TEST2a
# diversions: GROW - 1, GROW, BODY |-
#
# * TEST2b requires TEST3
# _m4_require_call pushes GROW - 2 and expands TEST3 here.
# (TEST3 requires TEST2a, but TEST2a has already been m4_provide'd, so
# nothing happens.)
# DUMP: BODY
# BODY: TEST2a
# GROW - 2: TEST3
# diversions: GROW - 2, GROW - 1, GROW, BODY |-
# Then the diversion is appended to DUMP, and popped.
# DUMP: BODY
# BODY: TEST2a; TEST3
# diversions: GROW - 1, GROW, BODY |-
#
# * TEST1 requires TEST2b (contd.)
# The content of TEST2b is expanded...
# DUMP: BODY
# BODY: TEST2a; TEST3
# GROW - 1: TEST2b,
# diversions: GROW - 1, GROW, BODY |-
# ... and moved to DUMP.
# DUMP: BODY
# BODY: TEST2a; TEST3; TEST2b
# diversions: GROW, BODY |-
#
# * TEST1 is expanded: epilogue
# TEST1's own content is in GROW...
# DUMP: BODY
# BODY: TEST2a; TEST3; TEST2b
# GROW: TEST1
# diversions: BODY |-
# ... and it's epilogue moves it to DUMP and then undefines DUMP.
# DUMP: undefined
# BODY: TEST2a; TEST3; TEST2b; TEST1
# diversions: BODY |-
#
#
# The third idea: track macros provided before they were required
# ---------------------------------------------------------------
#
# Using just the first two ideas, Autoconf 2.50 through 2.63 still had
# a subtle bug for more than seven years. Let's consider the
# following example to explain the bug:
#
# | m4_defun([TEST1], [1])
# | m4_defun([TEST2], [2[]m4_require([TEST1])])
# | m4_defun([TEST3], [3 TEST1 m4_require([TEST2])])
# | TEST3
#
# After the prologue of TEST3, we are collecting text in GROW with the
# intent of dumping it in BODY during the epilogue. Next, we
# encounter the direct invocation of TEST1, which provides the macro
# in place in GROW. From there, we encounter a requirement for TEST2,
# which must be collected in a new diversion. While expanding TEST2,
# we encounter a requirement for TEST1, but since it has already been
# expanded, the Axel Thimm algorithm states that we can treat it as a
# no-op. But that would lead to an end result of `2 3 1', meaning
# that we have once again output a macro (TEST2) prior to its
# requirements (TEST1).
#
# The problem can only occur if a single defun'd macro first provides,
# then later indirectly requires, the same macro. Note that directly
# expanding then requiring a macro is okay: because the dependency was
# met, the require phase can be a no-op. For that matter, the outer
# macro can even require two helpers, where the first helper expands
# the macro, and the second helper indirectly requires the macro.
# Out-of-order expansion is only present if the inner macro is
# required by something that will be hoisted in front of where the
# direct expansion occurred. In other words, we must be careful not
# to warn on:
#
# | m4_defun([TEST4], [4])
# | m4_defun([TEST5], [5 TEST4 m4_require([TEST4])])
# | TEST5 => 5 4
#
# or even the more complex:
#
# | m4_defun([TEST6], [6])
# | m4_defun([TEST7], [7 TEST6])
# | m4_defun([TEST8], [8 m4_require([TEST6])])
# | m4_defun([TEST9], [9 m4_require([TEST8])])
# | m4_defun([TEST10], [10 m4_require([TEST7]) m4_require([TEST9])])
# | TEST10 => 7 6 8 9 10
#
# So, to detect whether a require was direct or indirect, m4_defun and
# m4_require track the name of the macro that caused a diversion to be
# created (using the stack _m4_diverting, coupled with an O(1) lookup
# _m4_diverting([NAME])), and m4_provide stores the name associated
# with the diversion at which a macro was provided. A require call is
# direct if it occurs within the same diversion where the macro was
# provided, or if the diversion associated with the providing context
# has been collected.
#
# The implementation of the warning involves tracking the set of
# macros which have been provided since the start of the outermost
# defun'd macro (the set is named _m4_provide). When starting an
# outermost macro, the set is emptied; when a macro is provided, it is
# added to the set; when require expands the body of a macro, it is
# removed from the set; and when a macro is indirectly required, the
# set is checked. If a macro is in the set, then it has been provided
# before it was required, and we satisfy dependencies by expanding the
# macro as if it had never been provided; in the example given above,
# this means we now output `1 2 3 1'. Meanwhile, a warning is issued
# to inform the user that her macros trigger the bug in older autoconf
# versions, and that her output file now contains redundant contents
# (and possibly new problems, if the repeated macro was not
# idempotent). Meanwhile, macros defined by m4_defun_once instead of
# m4_defun are idempotent, avoiding any warning or duplicate output.
#
#
# 2. Keeping track of the expansion stack
# =======================================
#
# When M4 expansion goes wrong it is often extremely hard to find the
# path amongst macros that drove to the failure. What is needed is
# the stack of macro `calls'. One could imagine that GNU M4 would
# maintain a stack of macro expansions, unfortunately it doesn't, so
# we do it by hand. This is of course extremely costly, but the help
# this stack provides is worth it. Nevertheless to limit the
# performance penalty this is implemented only for m4_defun'd macros,
# not for define'd macros.
#
# Each time we enter an m4_defun'd macros, we add a definition in
# _m4_expansion_stack, and when we exit the macro, we remove it (thanks
# to pushdef/popdef). m4_stack_foreach is used to print the expansion
# stack in the rare cases when it's needed.
#
# In addition, we want to detect circular m4_require dependencies.
# Each time we expand a macro FOO we define _m4_expanding(FOO); and
# m4_require(BAR) simply checks whether _m4_expanding(BAR) is defined.
# m4_expansion_stack
# ------------------
# Expands to the entire contents of the expansion stack. The caller
# must supply a trailing newline. This macro always prints a
# location; check whether _m4_expansion_stack is defined to filter out
# the case when no defun'd macro is in force.
m4_define([m4_expansion_stack],
[m4_stack_foreach_sep_lifo([_$0], [_$0_entry(], [)
])m4_location[: the top level]])
# _m4_expansion_stack_entry(MACRO)
# --------------------------------
# Format an entry for MACRO found on the expansion stack.
m4_define([_m4_expansion_stack_entry],
[_m4_defn([m4_location($1)])[: $1 is expanded from...]])
# m4_expansion_stack_push(MACRO)
# ------------------------------
# Form an entry of the expansion stack on entry to MACRO and push it.
m4_define([m4_expansion_stack_push],
[m4_pushdef([_m4_expansion_stack], [$1])])
# _m4_divert(GROW)
# ----------------
# This diversion is used by the m4_defun/m4_require machinery. It is
# important to keep room before GROW because for each nested
# AC_REQUIRE we use an additional diversion (i.e., two m4_require's
# will use GROW - 2. More than 3 levels has never seemed to be
# needed.)
#
# ...
# - GROW - 2
# m4_require'd code, 2 level deep
# - GROW - 1
# m4_require'd code, 1 level deep
# - GROW
# m4_defun'd macros are elaborated here.
m4_define([_m4_divert(GROW)], 10000)
# _m4_defun_pro(MACRO-NAME)
# -------------------------
# The prologue for Autoconf macros.
#
# This is called frequently, so minimize the number of macro invocations
# by avoiding dnl and m4_defn overhead.
m4_define([_m4_defun_pro],
[m4_ifdef([_m4_expansion_stack], [], [_m4_defun_pro_outer([$1])])]dnl
[m4_expansion_stack_push([$1])m4_pushdef([_m4_expanding($1)])])
m4_define([_m4_defun_pro_outer],
[m4_set_delete([_m4_provide])]dnl
[m4_pushdef([_m4_diverting([$1])])m4_pushdef([_m4_diverting], [$1])]dnl
[m4_pushdef([_m4_divert_dump], m4_divnum)m4_divert_push([GROW])])
# _m4_defun_epi(MACRO-NAME)
# -------------------------
# The Epilogue for Autoconf macros. MACRO-NAME only helps tracing
# the PRO/EPI pairs.
#
# This is called frequently, so minimize the number of macro invocations
# by avoiding dnl and m4_popdef overhead.
m4_define([_m4_defun_epi],
[_m4_popdef([_m4_expanding($1)], [_m4_expansion_stack])]dnl
[m4_ifdef([_m4_expansion_stack], [], [_m4_defun_epi_outer([$1])])]dnl
[m4_provide([$1])])
m4_define([_m4_defun_epi_outer],
[_m4_popdef([_m4_divert_dump], [_m4_diverting([$1])], [_m4_diverting])]dnl
[m4_divert_pop([GROW])m4_undivert([GROW])])
# _m4_divert_dump
# ---------------
# If blank, we are outside of any defun'd macro. Otherwise, expands
# to the diversion number (not name) where require'd macros should be
# moved once completed.
m4_define([_m4_divert_dump])
# m4_divert_require(DIVERSION, NAME-TO-CHECK, [BODY-TO-EXPAND])
# -------------------------------------------------------------
# Same as m4_require, but BODY-TO-EXPAND goes into the named DIVERSION;
# requirements still go in the current diversion though.
#
m4_define([m4_divert_require],
[m4_ifdef([_m4_expanding($2)],
[m4_fatal([$0: circular dependency of $2])])]dnl
[m4_if(_m4_divert_dump, [],
[m4_fatal([$0($2): cannot be used outside of an m4_defun'd macro])])]dnl
[m4_provide_if([$2], [],
[_m4_require_call([$2], [$3], _m4_divert([$1], [-]))])])
# m4_defun(NAME, EXPANSION, [MACRO = m4_define])
# ----------------------------------------------
# Define a macro NAME which automatically provides itself. Add
# machinery so the macro automatically switches expansion to the
# diversion stack if it is not already using it, prior to EXPANSION.
# In this case, once finished, it will bring back all the code
# accumulated in the diversion stack. This, combined with m4_require,
# achieves the topological ordering of macros. We don't use this
# macro to define some frequently called macros that are not involved
# in ordering constraints, to save m4 processing.
#
# MACRO is an undocumented argument; when set to m4_pushdef, and NAME
# is already defined, the new definition is added to the pushdef
# stack, rather than overwriting the current definition. It can thus
# be used to write self-modifying macros, which pop themselves to a
# previously m4_define'd definition so that subsequent use of the
# macro is faster.
m4_define([m4_defun],
[m4_define([m4_location($1)], m4_location)]dnl
[m4_default([$3], [m4_define])([$1],
[_m4_defun_pro(]m4_dquote($[0])[)$2[]_m4_defun_epi(]m4_dquote($[0])[)])])
# m4_defun_init(NAME, INIT, COMMON)
# ---------------------------------
# Like m4_defun, but split EXPANSION into two portions: INIT which is
# done only the first time NAME is invoked, and COMMON which is
# expanded every time.
#
# For now, the COMMON definition is always m4_define'd, giving an even
# lighter-weight definition. m4_defun allows self-providing, but once
# a macro is provided, m4_require no longer cares if it is m4_define'd
# or m4_defun'd. m4_defun also provides location tracking to identify
# dependency bugs, but once the INIT has been expanded, we know there
# are no dependency bugs. However, if a future use needs COMMON to be
# m4_defun'd, we can add a parameter, similar to the third parameter
# to m4_defun.
m4_define([m4_defun_init],
[m4_define([$1], [$3[]])m4_defun([$1],
[$2[]_m4_popdef(]m4_dquote($[0])[)m4_indir(]m4_dquote($[0])dnl
[m4_if(]m4_dquote($[#])[, [0], [], ]m4_dquote([,$]@)[))], [m4_pushdef])])
# m4_defun_once(NAME, EXPANSION)
# ------------------------------
# Like m4_defun, but guarantee that EXPANSION only happens once
# (thereafter, using NAME is a no-op).
#
# If _m4_divert_dump is empty, we are called at the top level;
# otherwise, we must ensure that we are required in front of the
# current defun'd macro. Use a helper macro so that EXPANSION need
# only occur once in the definition of NAME, since it might be large.
m4_define([m4_defun_once],
[m4_define([m4_location($1)], m4_location)]dnl
[m4_define([$1], [_m4_defun_once([$1], [$2], m4_if(_m4_divert_dump, [],
[[_m4_defun_pro([$1])m4_unquote(], [)_m4_defun_epi([$1])]],
m4_ifdef([_m4_diverting([$1])], [-]), [-], [[m4_unquote(], [)]],
[[_m4_require_call([$1],], [, _m4_divert_dump)]]))])])
m4_define([_m4_defun_once],
[m4_pushdef([$1])$3[$2[]m4_provide([$1])]$4])
# m4_pattern_forbid(ERE, [WHY])
# -----------------------------
# Declare that no token matching the forbidden extended regular
# expression ERE should be seen in the output unless...
m4_define([m4_pattern_forbid], [])
# m4_pattern_allow(ERE)
# ---------------------
# ... that token also matches the allowed extended regular expression ERE.
# Both used via traces.
m4_define([m4_pattern_allow], [])
## --------------------------------- ##
## 11. Dependencies between macros. ##
## --------------------------------- ##
# m4_before(THIS-MACRO-NAME, CALLED-MACRO-NAME)
# ---------------------------------------------
# Issue a warning if CALLED-MACRO-NAME was called before THIS-MACRO-NAME.
m4_define([m4_before],
[m4_provide_if([$2],
[m4_warn([syntax], [$2 was called before $1])])])
# m4_require(NAME-TO-CHECK, [BODY-TO-EXPAND = NAME-TO-CHECK])
# -----------------------------------------------------------
# If NAME-TO-CHECK has never been expanded (actually, if it is not
# m4_provide'd), expand BODY-TO-EXPAND *before* the current macro
# expansion; follow the expansion with a newline. Once expanded, emit
# it in _m4_divert_dump. Keep track of the m4_require chain in
# _m4_expansion_stack.
#
# The normal cases are:
#
# - NAME-TO-CHECK == BODY-TO-EXPAND
# Which you can use for regular macros with or without arguments, e.g.,
# m4_require([AC_PROG_CC], [AC_PROG_CC])
# m4_require([AC_CHECK_HEADERS(threads.h)], [AC_CHECK_HEADERS(threads.h)])
# which is just the same as
# m4_require([AC_PROG_CC])
# m4_require([AC_CHECK_HEADERS(threads.h)])
#
# - BODY-TO-EXPAND == m4_indir([NAME-TO-CHECK])
# In the case of macros with irregular names. For instance:
# m4_require([AC_LANG_COMPILER(C)], [indir([AC_LANG_COMPILER(C)])])
# which means `if the macro named `AC_LANG_COMPILER(C)' (the parens are
# part of the name, it is not an argument) has not been run, then
# call it.'
# Had you used
# m4_require([AC_LANG_COMPILER(C)], [AC_LANG_COMPILER(C)])
# then m4_require would have tried to expand `AC_LANG_COMPILER(C)', i.e.,
# call the macro `AC_LANG_COMPILER' with `C' as argument.
#
# You could argue that `AC_LANG_COMPILER', when it receives an argument
# such as `C' should dispatch the call to `AC_LANG_COMPILER(C)'. But this
# `extension' prevents `AC_LANG_COMPILER' from having actual arguments that
# it passes to `AC_LANG_COMPILER(C)'.
#
# This is called frequently, so minimize the number of macro invocations
# by avoiding dnl and other overhead on the common path.
m4_define([m4_require],
[m4_ifdef([_m4_expanding($1)],
[m4_fatal([$0: circular dependency of $1])])]dnl
[m4_if(_m4_divert_dump, [],
[m4_fatal([$0($1): cannot be used outside of an ]dnl
m4_if([$0], [m4_require], [[m4_defun]], [[AC_DEFUN]])['d macro])])]dnl
[m4_provide_if([$1], [m4_set_contains([_m4_provide], [$1],
[_m4_require_check([$1], _m4_defn([m4_provide($1)]), [$0])], [m4_ignore])],
[_m4_require_call])([$1], [$2], _m4_divert_dump)])
# _m4_require_call(NAME-TO-CHECK, [BODY-TO-EXPAND = NAME-TO-CHECK],
# DIVERSION-NUMBER)
# -----------------------------------------------------------------
# If m4_require decides to expand the body, it calls this macro. The
# expansion is placed in DIVERSION-NUMBER.
#
# This is called frequently, so minimize the number of macro invocations
# by avoiding dnl and other overhead on the common path.
# The use of a witness macro protecting the warning allows aclocal
# to silence any warnings when probing for what macros are required
# and must therefore be located, when using the Autoconf-without-aclocal-m4
# autom4te language. For more background, see:
# https://lists.gnu.org/archive/html/automake-patches/2012-11/msg00035.html
m4_define([_m4_require_call],
[m4_pushdef([_m4_divert_grow], m4_decr(_m4_divert_grow))]dnl
[m4_pushdef([_m4_diverting([$1])])m4_pushdef([_m4_diverting], [$1])]dnl
[m4_divert_push(_m4_divert_grow, [-])]dnl
[m4_if([$2], [], [$1], [$2])
m4_provide_if([$1], [m4_set_remove([_m4_provide], [$1])],
[m4_ifndef([m4_require_silent_probe],
[m4_warn([syntax], [$1 is m4_require'd but not m4_defun'd])])])]dnl
[_m4_divert_raw($3)_m4_undivert(_m4_divert_grow)]dnl
[m4_divert_pop(_m4_divert_grow)_m4_popdef([_m4_divert_grow],
[_m4_diverting([$1])], [_m4_diverting])])
# _m4_require_check(NAME-TO-CHECK, OWNER, CALLER)
# -----------------------------------------------
# NAME-TO-CHECK has been identified as previously expanded in the
# diversion owned by OWNER. If this is a problem, warn on behalf of
# CALLER and return _m4_require_call; otherwise return m4_ignore.
m4_define([_m4_require_check],
[m4_if(_m4_defn([_m4_diverting]), [$2], [m4_ignore],
m4_ifdef([_m4_diverting([$2])], [-]), [-], [m4_warn([syntax],
[$3: `$1' was expanded before it was required
http://www.gnu.org/software/autoconf/manual/autoconf.html#Expanded-Before-Required])_m4_require_call],
[m4_ignore])])
# _m4_divert_grow
# ---------------
# The counter for _m4_require_call.
m4_define([_m4_divert_grow], _m4_divert([GROW]))
# m4_expand_once(TEXT, [WITNESS = TEXT])
# --------------------------------------
# If TEXT has never been expanded, expand it *here*. Use WITNESS as
# as a memory that TEXT has already been expanded.
m4_define([m4_expand_once],
[m4_provide_if(m4_default_quoted([$2], [$1]),
[],
[m4_provide(m4_default_quoted([$2], [$1]))[]$1])])
# m4_provide(MACRO-NAME)
# ----------------------
m4_define([m4_provide],
[m4_ifdef([m4_provide($1)], [],
[m4_set_add([_m4_provide], [$1], [m4_define([m4_provide($1)],
m4_ifdef([_m4_diverting], [_m4_defn([_m4_diverting])]))])])])
# m4_provide_if(MACRO-NAME, IF-PROVIDED, IF-NOT-PROVIDED)
# -------------------------------------------------------
# If MACRO-NAME is provided do IF-PROVIDED, else IF-NOT-PROVIDED.
# The purpose of this macro is to provide the user with a means to
# check macros which are provided without letting her know how the
# information is coded.
m4_define([m4_provide_if],
[m4_ifdef([m4_provide($1)],
[$2], [$3])])
## --------------------- ##
## 12. Text processing. ##
## --------------------- ##
# m4_cr_letters
# m4_cr_LETTERS
# m4_cr_Letters
# -------------
m4_define([m4_cr_letters], [abcdefghijklmnopqrstuvwxyz])
m4_define([m4_cr_LETTERS], [ABCDEFGHIJKLMNOPQRSTUVWXYZ])
m4_define([m4_cr_Letters],
m4_defn([m4_cr_letters])dnl
m4_defn([m4_cr_LETTERS])dnl
)
# m4_cr_digits
# ------------
m4_define([m4_cr_digits], [0123456789])
# m4_cr_alnum
# -----------
m4_define([m4_cr_alnum],
m4_defn([m4_cr_Letters])dnl
m4_defn([m4_cr_digits])dnl
)
# m4_cr_symbols1
# m4_cr_symbols2
# --------------
m4_define([m4_cr_symbols1],
m4_defn([m4_cr_Letters])dnl
_)
m4_define([m4_cr_symbols2],
m4_defn([m4_cr_symbols1])dnl
m4_defn([m4_cr_digits])dnl
)
# m4_cr_all
# ---------
# The character range representing everything, with `-' as the last
# character, since it is special to m4_translit. Use with care, because
# it contains characters special to M4 (fortunately, both ASCII and EBCDIC
# have [] in order, so m4_defn([m4_cr_all]) remains a valid string). It
# also contains characters special to terminals, so it should never be
# displayed in an error message. Also, attempts to map [ and ] to other
# characters via m4_translit must deal with the fact that m4_translit does
# not add quotes to the output.
#
# In EBCDIC, $ is immediately followed by *, which leads to problems
# if m4_cr_all is inlined into a macro definition; so swap them.
#
# It is mainly useful in generating inverted character range maps, for use
# in places where m4_translit is faster than an equivalent m4_bpatsubst;
# the regex `[^a-z]' is equivalent to:
# m4_translit(m4_dquote(m4_defn([m4_cr_all])), [a-z])
m4_define([m4_cr_all],
m4_translit(m4_dquote(m4_format(m4_dquote(m4_for(
,1,255,,[[%c]]))m4_for([i],1,255,,[,i]))), [$*-], [*$])-)
# _m4_define_cr_not(CATEGORY)
# ---------------------------
# Define m4_cr_not_CATEGORY as the inverse of m4_cr_CATEGORY.
m4_define([_m4_define_cr_not],
[m4_define([m4_cr_not_$1],
m4_translit(m4_dquote(m4_defn([m4_cr_all])),
m4_defn([m4_cr_$1])))])
# m4_cr_not_letters
# m4_cr_not_LETTERS
# m4_cr_not_Letters
# m4_cr_not_digits
# m4_cr_not_alnum
# m4_cr_not_symbols1
# m4_cr_not_symbols2
# ------------------
# Inverse character sets
_m4_define_cr_not([letters])
_m4_define_cr_not([LETTERS])
_m4_define_cr_not([Letters])
_m4_define_cr_not([digits])
_m4_define_cr_not([alnum])
_m4_define_cr_not([symbols1])
_m4_define_cr_not([symbols2])
# m4_newline([STRING])
# --------------------
# Expands to a newline, possibly followed by STRING. Exists mostly for
# formatting reasons.
m4_define([m4_newline], [
$1])
# m4_re_escape(STRING)
# --------------------
# Escape RE active characters in STRING.
m4_define([m4_re_escape],
[m4_bpatsubst([$1],
[[][*+.?\^$]], [\\\&])])
# m4_re_string
# ------------
# Regexp for `[a-zA-Z_0-9]*'
# m4_dquote provides literal [] for the character class.
m4_define([m4_re_string],
m4_dquote(m4_defn([m4_cr_symbols2]))dnl
[*]dnl
)
# m4_re_word
# ----------
# Regexp for `[a-zA-Z_][a-zA-Z_0-9]*'
m4_define([m4_re_word],
m4_dquote(m4_defn([m4_cr_symbols1]))dnl
m4_defn([m4_re_string])dnl
)
# m4_tolower(STRING)
# m4_toupper(STRING)
# ------------------
# These macros convert STRING to lowercase or uppercase.
#
# Rather than expand the m4_defn each time, we inline them up front.
m4_define([m4_tolower],
[m4_translit([[$1]], ]m4_dquote(m4_defn([m4_cr_LETTERS]))[,
]m4_dquote(m4_defn([m4_cr_letters]))[)])
m4_define([m4_toupper],
[m4_translit([[$1]], ]m4_dquote(m4_defn([m4_cr_letters]))[,
]m4_dquote(m4_defn([m4_cr_LETTERS]))[)])
# m4_split(STRING, [REGEXP])
# --------------------------
# Split STRING into an m4 list of quoted elements. The elements are
# quoted with [ and ]. Beginning spaces and end spaces *are kept*.
# Use m4_strip to remove them.
#
# REGEXP specifies where to split. Default is [\t ]+.
#
# If STRING is empty, the result is an empty list.
#
# Pay attention to the m4_changequotes. When m4 reads the definition of
# m4_split, it still has quotes set to [ and ]. Luckily, these are matched
# in the macro body, so the definition is stored correctly. Use the same
# alternate quotes as m4_noquote; it must be unlikely to appear in $1.
#
# Also, notice that $1 is quoted twice, since we want the result to
# be quoted. Then you should understand that the argument of
# patsubst is -=<{(STRING)}>=- (i.e., with additional -=<{( and )}>=-).
#
# This macro is safe on active symbols, i.e.:
# m4_define(active, ACTIVE)
# m4_split([active active ])end
# => [active], [active], []end
#
# Optimize on regex of ` ' (space), since m4_foreach_w already guarantees
# that the list contains single space separators, and a common case is
# splitting a single-element list. This macro is called frequently,
# so avoid unnecessary dnl inside the definition.
m4_define([m4_split],
[m4_if([$1], [], [],
[$2], [ ], [m4_if(m4_index([$1], [ ]), [-1], [[[$1]]],
[_$0([$1], [$2], [, ])])],
[$2], [], [_$0([$1], [[ ]+], [, ])],
[_$0([$1], [$2], [, ])])])
m4_define([_m4_split],
[m4_changequote([-=<{(],[)}>=-])]dnl
[[m4_bpatsubst(-=<{(-=<{($1)}>=-)}>=-, -=<{($2)}>=-,
-=<{(]$3[)}>=-)]m4_changequote([, ])])
# m4_chomp(STRING)
# m4_chomp_all(STRING)
# --------------------
# Return STRING quoted, but without a trailing newline. m4_chomp
# removes at most one newline, while m4_chomp_all removes all
# consecutive trailing newlines. Embedded newlines are not touched,
# and a trailing backslash-newline leaves just a trailing backslash.
#
# m4_bregexp is slower than m4_index, and we don't always want to
# remove all newlines; hence the two variants. We massage characters
# to give a nicer pattern to match, particularly since m4_bregexp is
# line-oriented. Both versions must guarantee a match, to avoid bugs
# with precision -1 in m4_format in older m4.
m4_define([m4_chomp],
[m4_format([[%.*s]], m4_index(m4_translit([[$1]], [
/.], [/ ])[./.], [/.]), [$1])])
m4_define([m4_chomp_all],
[m4_format([[%.*s]], m4_bregexp(m4_translit([[$1]], [
/], [/ ]), [/*$]), [$1])])
# m4_flatten(STRING)
# ------------------
# If STRING contains end of lines, replace them with spaces. If there
# are backslashed end of lines, remove them. This macro is safe with
# active symbols.
# m4_define(active, ACTIVE)
# m4_flatten([active
# act\
# ive])end
# => active activeend
#
# In m4, m4_bpatsubst is expensive, so first check for a newline.
m4_define([m4_flatten],
[m4_if(m4_index([$1], [
]), [-1], [[$1]],
[m4_translit(m4_bpatsubst([[[$1]]], [\\
]), [
], [ ])])])
# m4_strip(STRING)
# ----------------
# Expands into STRING with tabs and spaces singled out into a single
# space, and removing leading and trailing spaces.
#
# This macro is robust to active symbols.
# m4_define(active, ACTIVE)
# m4_strip([ active active ])end
# => active activeend
#
# First, notice that we guarantee trailing space. Why? Because regular
# expressions are greedy, and `.* ?' would always group the space into the
# .* portion. The algorithm is simpler by avoiding `?' at the end. The
# algorithm correctly strips everything if STRING is just ` '.
#
# Then notice the second pattern: it is in charge of removing the
# leading/trailing spaces. Why not just `[^ ]'? Because they are
# applied to over-quoted strings, i.e. more or less [STRING], due
# to the limitations of m4_bpatsubsts. So the leading space in STRING
# is the *second* character; equally for the trailing space.
m4_define([m4_strip],
[m4_bpatsubsts([$1 ],
[[ ]+], [ ],
[^. ?\(.*\) .$], [[[\1]]])])
# m4_normalize(STRING)
# --------------------
# Apply m4_flatten and m4_strip to STRING.
#
# The argument is quoted, so that the macro is robust to active symbols:
#
# m4_define(active, ACTIVE)
# m4_normalize([ act\
# ive
# active ])end
# => active activeend
m4_define([m4_normalize],
[m4_strip(m4_flatten([$1]))])
# m4_join(SEP, ARG1, ARG2...)
# ---------------------------
# Produce ARG1SEPARG2...SEPARGn. Avoid back-to-back SEP when a given ARG
# is the empty string. No expansion is performed on SEP or ARGs.
#
# Since the number of arguments to join can be arbitrarily long, we
# want to avoid having more than one $@ in the macro definition;
# otherwise, the expansion would require twice the memory of the already
# long list. Hence, m4_join merely looks for the first non-empty element,
# and outputs just that element; while _m4_join looks for all non-empty
# elements, and outputs them following a separator. The final trick to
# note is that we decide between recursing with $0 or _$0 based on the
# nested m4_if ending with `_'.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_join],
[m4_if([$#], [1], [],
[$#], [2], [[$2]],
[m4_if([$2], [], [], [[$2]_])$0([$1], m4_shift2($@))])])
m4_define([_m4_join],
[m4_if([$#$2], [2], [],
[m4_if([$2], [], [], [[$1$2]])$0([$1], m4_shift2($@))])])
# m4_joinall(SEP, ARG1, ARG2...)
# ------------------------------
# Produce ARG1SEPARG2...SEPARGn. An empty ARG results in back-to-back SEP.
# No expansion is performed on SEP or ARGs.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_joinall], [[$2]_$0([$1], m4_shift($@))])
m4_define([_m4_joinall],
[m4_if([$#], [2], [], [[$1$3]$0([$1], m4_shift2($@))])])
# m4_combine([SEPARATOR], PREFIX-LIST, [INFIX], SUFFIX...)
# --------------------------------------------------------
# Produce the pairwise combination of every element in the quoted,
# comma-separated PREFIX-LIST with every element from the SUFFIX arguments.
# Each pair is joined with INFIX, and pairs are separated by SEPARATOR.
# No expansion occurs on SEPARATOR, INFIX, or elements of either list.
#
# For example:
# m4_combine([, ], [[a], [b], [c]], [-], [1], [2], [3])
# => a-1, a-2, a-3, b-1, b-2, b-3, c-1, c-2, c-3
#
# This definition is a bit hairy; the thing to realize is that we want
# to construct m4_map_args_sep([[prefix$3]], [], [[$1]], m4_shift3($@))
# as the inner loop, using each prefix generated by the outer loop,
# and without recalculating m4_shift3 every outer iteration.
m4_define([m4_combine],
[m4_if([$2], [], [], m4_eval([$# > 3]), [1],
[m4_map_args_sep([m4_map_args_sep(m4_dquote(], [)[[$3]], [], [[$1]],]]]dnl
[m4_dquote(m4_dquote(m4_shift3($@)))[[)], [[$1]], $2)])])
# m4_append(MACRO-NAME, STRING, [SEPARATOR])
# ------------------------------------------
# Redefine MACRO-NAME to hold its former content plus `SEPARATOR`'STRING'
# at the end. It is valid to use this macro with MACRO-NAME undefined,
# in which case no SEPARATOR is added. Be aware that the criterion is
# `not being defined', and not `not being empty'.
#
# Note that neither STRING nor SEPARATOR are expanded here; rather, when
# you expand MACRO-NAME, they will be expanded at that point in time.
#
# This macro is robust to active symbols. It can be used to grow
# strings.
#
# | m4_define(active, ACTIVE)dnl
# | m4_append([sentence], [This is an])dnl
# | m4_append([sentence], [ active ])dnl
# | m4_append([sentence], [symbol.])dnl
# | sentence
# | m4_undefine([active])dnl
# | sentence
# => This is an ACTIVE symbol.
# => This is an active symbol.
#
# It can be used to define hooks.
#
# | m4_define(active, ACTIVE)dnl
# | m4_append([hooks], [m4_define([act1], [act2])])dnl
# | m4_append([hooks], [m4_define([act2], [active])])dnl
# | m4_undefine([active])dnl
# | act1
# | hooks
# | act1
# => act1
# =>
# => active
#
# It can also be used to create lists, although this particular usage was
# broken prior to autoconf 2.62.
# | m4_append([list], [one], [, ])dnl
# | m4_append([list], [two], [, ])dnl
# | m4_append([list], [three], [, ])dnl
# | list
# | m4_dquote(list)
# => one, two, three
# => [one],[two],[three]
#
# Note that m4_append can benefit from amortized O(n) m4 behavior, if
# the underlying m4 implementation is smart enough to avoid copying existing
# contents when enlarging a macro's definition into any pre-allocated storage
# (m4 1.4.x unfortunately does not implement this optimization). We do
# not implement m4_prepend, since it is inherently O(n^2) (pre-allocated
# storage only occurs at the end of a macro, so the existing contents must
# always be moved).
#
# Use _m4_defn for speed.
m4_define([m4_append],
[m4_define([$1], m4_ifdef([$1], [_m4_defn([$1])[$3]])[$2])])
# m4_append_uniq(MACRO-NAME, STRING, [SEPARATOR], [IF-UNIQ], [IF-DUP])
# --------------------------------------------------------------------
# Like `m4_append', but append only if not yet present. Additionally,
# expand IF-UNIQ if STRING was appended, or IF-DUP if STRING was already
# present. Also, warn if SEPARATOR is not empty and occurs within STRING,
# as the algorithm no longer guarantees uniqueness.
#
# Note that while m4_append can be O(n) (depending on the quality of the
# underlying M4 implementation), m4_append_uniq is inherently O(n^2)
# because each append operation searches the entire string.
m4_define([m4_append_uniq],
[m4_ifval([$3], [m4_if(m4_index([$2], [$3]), [-1], [],
[m4_warn([syntax],
[$0: `$2' contains `$3'])])])_$0($@)])
m4_define([_m4_append_uniq],
[m4_ifdef([$1],
[m4_if(m4_index([$3]_m4_defn([$1])[$3], [$3$2$3]), [-1],
[m4_append([$1], [$2], [$3])$4], [$5])],
[m4_define([$1], [$2])$4])])
# m4_append_uniq_w(MACRO-NAME, STRINGS)
# -------------------------------------
# For each of the words in the whitespace separated list STRINGS, append
# only the unique strings to the definition of MACRO-NAME.
#
# Use _m4_defn for speed.
m4_define([m4_append_uniq_w],
[m4_map_args_w([$2], [_m4_append_uniq([$1],], [, [ ])])])
# m4_escape(STRING)
# -----------------
# Output quoted STRING, but with embedded #, $, [ and ] turned into
# quadrigraphs.
#
# It is faster to check if STRING is already good using m4_translit
# than to blindly perform four m4_bpatsubst.
#
# Because the translit is stripping quotes, it must also neutralize
# anything that might be in a macro name, as well as comments, commas,
# and parentheses. All the problem characters are unified so that a
# single m4_index can scan the result.
#
# Rather than expand m4_defn every time m4_escape is expanded, we
# inline its expansion up front.
m4_define([m4_escape],
[m4_if(m4_index(m4_translit([$1],
[[]#,()]]m4_dquote(m4_defn([m4_cr_symbols2]))[, [$$$]), [$]),
[-1], [m4_echo], [_$0])([$1])])
m4_define([_m4_escape],
[m4_changequote([-=<{(],[)}>=-])]dnl
[m4_bpatsubst(m4_bpatsubst(m4_bpatsubst(m4_bpatsubst(
-=<{(-=<{(-=<{(-=<{(-=<{($1)}>=-)}>=-)}>=-)}>=-)}>=-,
-=<{(#)}>=-, -=<{(@%:@)}>=-),
-=<{(\[)}>=-, -=<{(@<:@)}>=-),
-=<{(\])}>=-, -=<{(@:>@)}>=-),
-=<{(\$)}>=-, -=<{(@S|@)}>=-)m4_changequote([,])])
# m4_text_wrap(STRING, [PREFIX], [FIRST-PREFIX], [WIDTH])
# -------------------------------------------------------
# Expands into STRING wrapped to hold in WIDTH columns (default = 79).
# If PREFIX is given, each line is prefixed with it. If FIRST-PREFIX is
# specified, then the first line is prefixed with it. As a special case,
# if the length of FIRST-PREFIX is greater than that of PREFIX, then
# FIRST-PREFIX will be left alone on the first line.
#
# No expansion occurs on the contents STRING, PREFIX, or FIRST-PREFIX,
# although quadrigraphs are correctly recognized. More precisely,
# you may redefine m4_qlen to recognize whatever escape sequences that
# you will post-process.
#
# Typical outputs are:
#
# m4_text_wrap([Short string */], [ ], [/* ], 20)
# => /* Short string */
#
# m4_text_wrap([Much longer string */], [ ], [/* ], 20)
# => /* Much longer
# => string */
#
# m4_text_wrap([Short doc.], [ ], [ --short ], 30)
# => --short Short doc.
#
# m4_text_wrap([Short doc.], [ ], [ --too-wide ], 30)
# => --too-wide
# => Short doc.
#
# m4_text_wrap([Super long documentation.], [ ], [ --too-wide ], 30)
# => --too-wide
# => Super long
# => documentation.
#
# FIXME: there is no checking of a longer PREFIX than WIDTH, but do
# we really want to bother with people trying each single corner
# of a software?
#
# This macro does not leave a trailing space behind the last word of a line,
# which complicates it a bit. The algorithm is otherwise stupid and simple:
# all the words are preceded by m4_Separator which is defined to empty for
# the first word, and then ` ' (single space) for all the others.
#
# The algorithm uses a helper that uses $2 through $4 directly, rather than
# using local variables, to avoid m4_defn overhead, or expansion swallowing
# any $. It also bypasses m4_popdef overhead with _m4_popdef since no user
# macro expansion occurs in the meantime. Also, the definition is written
# with m4_do, to avoid time wasted on dnl during expansion (since this is
# already a time-consuming macro).
m4_define([m4_text_wrap],
[_$0(m4_escape([$1]), [$2], m4_default_quoted([$3], [$2]),
m4_default_quoted([$4], [79]))])
m4_define([_m4_text_wrap],
m4_do(dnl set up local variables, to avoid repeated calculations
[[m4_pushdef([m4_Indent], m4_qlen([$2]))]],
[[m4_pushdef([m4_Cursor], m4_qlen([$3]))]],
[[m4_pushdef([m4_Separator], [m4_define([m4_Separator], [ ])])]],
dnl expand the first prefix, then check its length vs. regular prefix
dnl same length: nothing special
dnl prefix1 longer: output on line by itself, and reset cursor
dnl prefix1 shorter: pad to length of prefix, and reset cursor
[[[$3]m4_cond([m4_Cursor], m4_Indent, [],
[m4_eval(m4_Cursor > m4_Indent)], [1], [
[$2]m4_define([m4_Cursor], m4_Indent)],
[m4_format([%*s], m4_max([0],
m4_eval(m4_Indent - m4_Cursor)), [])m4_define([m4_Cursor], m4_Indent)])]],
dnl now, for each word, compute the cursor after the word is output, then
dnl check if the cursor would exceed the wrap column
dnl if so, reset cursor, and insert newline and prefix
dnl if not, insert the separator (usually a space)
dnl either way, insert the word
[[m4_map_args_w([$1], [$0_word(], [, [$2], [$4])])]],
dnl finally, clean up the local variables
[[_m4_popdef([m4_Separator], [m4_Cursor], [m4_Indent])]]))
m4_define([_m4_text_wrap_word],
[m4_define([m4_Cursor], m4_eval(m4_Cursor + m4_qlen([$1]) + 1))]dnl
[m4_if(m4_eval(m4_Cursor > ([$3])),
[1], [m4_define([m4_Cursor], m4_eval(m4_Indent + m4_qlen([$1]) + 1))
[$2]],
[m4_Separator[]])[$1]])
# m4_text_box(MESSAGE, [FRAME-CHARACTER = `-'])
# ---------------------------------------------
# Turn MESSAGE into:
# ## ------- ##
# ## MESSAGE ##
# ## ------- ##
# using FRAME-CHARACTER in the border.
#
# Quadrigraphs are correctly recognized. More precisely, you may
# redefine m4_qlen to recognize whatever escape sequences that you
# will post-process.
m4_define([m4_text_box],
[m4_pushdef([m4_Border],
m4_translit(m4_format([[[%*s]]], m4_decr(m4_qlen(_m4_expand([$1
]))), []), [ ], m4_default_quoted([$2], [-])))]dnl
[[##] _m4_defn([m4_Border]) [##]
[##] $1 [##]
[##] _m4_defn([m4_Border]) [##]_m4_popdef([m4_Border])])
# m4_qlen(STRING)
# ---------------
# Expands to the length of STRING after autom4te converts all quadrigraphs.
#
# If you use some other means of post-processing m4 output rather than
# autom4te, then you may redefine this macro to recognize whatever
# escape sequences your post-processor will handle. For that matter,
# m4_define([m4_qlen], m4_defn([m4_len])) is sufficient if you don't
# do any post-processing.
#
# Avoid bpatsubsts for the common case of no quadrigraphs. Cache
# results, as configure scripts tend to ask about lengths of common
# strings like `/*' and `*/' rather frequently. Minimize the number
# of times that $1 occurs in m4_qlen, so there is less text to parse
# on a cache hit.
m4_define([m4_qlen],
[m4_ifdef([$0-$1], [_m4_defn([$0-]], [_$0(])[$1])])
m4_define([_m4_qlen],
[m4_define([m4_qlen-$1],
m4_if(m4_index([$1], [@]), [-1], [m4_len([$1])],
[m4_len(m4_bpatsubst([[$1]],
[@\(\(<:\|:>\|S|\|%:\|\{:\|:\}\)\(@\)\|&t@\)],
[\3]))]))_m4_defn([m4_qlen-$1])])
# m4_copyright_condense(TEXT)
# ---------------------------
# Condense the copyright notice in TEXT to only display the final
# year, wrapping the results to fit in 80 columns.
m4_define([m4_copyright_condense],
[m4_text_wrap(m4_bpatsubst(m4_flatten([[$1]]),
[(C)[- ,0-9]*\([1-9][0-9][0-9][0-9]\)], [(C) \1]))])
## ----------------------- ##
## 13. Number processing. ##
## ----------------------- ##
# m4_cmp(A, B)
# ------------
# Compare two integer expressions.
# A < B -> -1
# A = B -> 0
# A > B -> 1
m4_define([m4_cmp],
[m4_eval((([$1]) > ([$2])) - (([$1]) < ([$2])))])
# m4_list_cmp(A, B)
# -----------------
#
# Compare the two lists of integer expressions A and B. For instance:
# m4_list_cmp([1, 0], [1]) -> 0
# m4_list_cmp([1, 0], [1, 0]) -> 0
# m4_list_cmp([1, 2], [1, 0]) -> 1
# m4_list_cmp([1, 2, 3], [1, 2]) -> 1
# m4_list_cmp([1, 2, -3], [1, 2]) -> -1
# m4_list_cmp([1, 0], [1, 2]) -> -1
# m4_list_cmp([1], [1, 2]) -> -1
# m4_define([xa], [oops])dnl
# m4_list_cmp([[0xa]], [5+5]) -> 0
#
# Rather than face the overhead of m4_case, we use a helper function whose
# expansion includes the name of the macro to invoke on the tail, either
# m4_ignore or m4_unquote. This is particularly useful when comparing
# long lists, since less text is being expanded for deciding when to end
# recursion. The recursion is between a pair of macros that alternate
# which list is trimmed by one element; this is more efficient than
# calling m4_cdr on both lists from a single macro. Guarantee exactly
# one expansion of both lists' side effects.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_list_cmp],
[_$0_raw(m4_dquote($1), m4_dquote($2))])
m4_define([_m4_list_cmp_raw],
[m4_if([$1], [$2], [0], [_m4_list_cmp_1([$1], $2)])])
m4_define([_m4_list_cmp],
[m4_if([$1], [], [0m4_ignore], [$2], [0], [m4_unquote], [$2m4_ignore])])
m4_define([_m4_list_cmp_1],
[_m4_list_cmp_2([$2], [m4_shift2($@)], $1)])
m4_define([_m4_list_cmp_2],
[_m4_list_cmp([$1$3], m4_cmp([$3+0], [$1+0]))(
[_m4_list_cmp_1(m4_dquote(m4_shift3($@)), $2)])])
# m4_max(EXPR, ...)
# m4_min(EXPR, ...)
# -----------------
# Return the decimal value of the maximum (or minimum) in a series of
# integer expressions.
#
# M4 1.4.x doesn't provide ?:. Hence this huge m4_eval. Avoid m4_eval
# if both arguments are identical, but be aware of m4_max(0xa, 10) (hence
# the use of <=, not just <, in the second multiply).
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_max],
[m4_if([$#], [0], [m4_fatal([too few arguments to $0])],
[$#], [1], [m4_eval([$1])],
[$#$1], [2$2], [m4_eval([$1])],
[$#], [2], [_$0($@)],
[_m4_minmax([_$0], $@)])])
m4_define([_m4_max],
[m4_eval((([$1]) > ([$2])) * ([$1]) + (([$1]) <= ([$2])) * ([$2]))])
m4_define([m4_min],
[m4_if([$#], [0], [m4_fatal([too few arguments to $0])],
[$#], [1], [m4_eval([$1])],
[$#$1], [2$2], [m4_eval([$1])],
[$#], [2], [_$0($@)],
[_m4_minmax([_$0], $@)])])
m4_define([_m4_min],
[m4_eval((([$1]) < ([$2])) * ([$1]) + (([$1]) >= ([$2])) * ([$2]))])
# _m4_minmax(METHOD, ARG1, ARG2...)
# ---------------------------------
# Common recursion code for m4_max and m4_min. METHOD must be _m4_max
# or _m4_min, and there must be at least two arguments to combine.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([_m4_minmax],
[m4_if([$#], [3], [$1([$2], [$3])],
[$0([$1], $1([$2], [$3]), m4_shift3($@))])])
# m4_sign(A)
# ----------
# The sign of the integer expression A.
m4_define([m4_sign],
[m4_eval((([$1]) > 0) - (([$1]) < 0))])
## ------------------------ ##
## 14. Version processing. ##
## ------------------------ ##
# m4_version_unletter(VERSION)
# ----------------------------
# Normalize beta version numbers with letters to numeric expressions, which
# can then be handed to m4_eval for the purpose of comparison.
#
# Nl -> (N+1).-1.(l#)
#
# for example:
# [2.14a] -> [0,2,14+1,-1,[0r36:a]] -> 2.15.-1.10
# [2.14b] -> [0,2,15+1,-1,[0r36:b]] -> 2.15.-1.11
# [2.61aa.b] -> [0,2.61,1,-1,[0r36:aa],+1,-1,[0r36:b]] -> 2.62.-1.370.1.-1.11
# [08] -> [0,[0r10:0]8] -> 8
#
# This macro expects reasonable version numbers, but can handle double
# letters and does not expand any macros. Original version strings can
# use both `.' and `-' separators.
#
# Inline constant expansions, to avoid m4_defn overhead.
# _m4_version_unletter is the real workhorse used by m4_version_compare,
# but since [0r36:a] and commas are less readable than 10 and dots, we
# provide a wrapper for human use.
m4_define([m4_version_unletter],
[m4_substr(m4_map_args([.m4_eval], m4_unquote(_$0([$1]))), [3])])
m4_define([_m4_version_unletter],
[m4_bpatsubst(m4_bpatsubst(m4_translit([[[[0,$1]]]], [.-], [,,]),]dnl
m4_dquote(m4_dquote(m4_defn([m4_cr_Letters])))[[+],
[+1,-1,[0r36:\&]]), [,0], [,[0r10:0]])])
# m4_version_compare(VERSION-1, VERSION-2)
# ----------------------------------------
# Compare the two version numbers and expand into
# -1 if VERSION-1 < VERSION-2
# 0 if =
# 1 if >
#
# Since _m4_version_unletter does not output side effects, we can
# safely bypass the overhead of m4_version_cmp.
m4_define([m4_version_compare],
[_m4_list_cmp_raw(_m4_version_unletter([$1]), _m4_version_unletter([$2]))])
# m4_PACKAGE_NAME
# m4_PACKAGE_TARNAME
# m4_PACKAGE_VERSION
# m4_PACKAGE_STRING
# m4_PACKAGE_BUGREPORT
# --------------------
# If m4sugar/version.m4 is present, then define version strings. This
# file is optional, provided by Autoconf but absent in Bison.
m4_sinclude([m4sugar/version.m4])
# m4_version_prereq(VERSION, [IF-OK], [IF-NOT = FAIL])
# ----------------------------------------------------
# Check this Autoconf version against VERSION.
m4_define([m4_version_prereq],
m4_ifdef([m4_PACKAGE_VERSION],
[[m4_if(m4_version_compare(]m4_dquote(m4_defn([m4_PACKAGE_VERSION]))[, [$1]),
[-1],
[m4_default([$3],
[m4_fatal([Autoconf version $1 or higher is required],
[63])])],
[$2])]],
[[m4_fatal([m4sugar/version.m4 not found])]]))
## ------------------ ##
## 15. Set handling. ##
## ------------------ ##
# Autoconf likes to create arbitrarily large sets; for example, as of
# this writing, the configure.ac for coreutils tracks a set of more
# than 400 AC_SUBST. How do we track all of these set members,
# without introducing duplicates? We could use m4_append_uniq, with
# the set NAME residing in the contents of the macro NAME.
# Unfortunately, m4_append_uniq is quadratic for set creation, because
# it costs O(n) to search the string for each of O(n) insertions; not
# to mention that with m4 1.4.x, even using m4_append is slow, costing
# O(n) rather than O(1) per insertion. Other set operations, not used
# by Autoconf but still possible by manipulation of the definition
# tracked in macro NAME, include O(n) deletion of one element and O(n)
# computation of set size. Because the set is exposed to the user via
# the definition of a single macro, we cannot cache any data about the
# set without risking the cache being invalidated by the user
# redefining NAME.
#
# Can we do better? Yes, because m4 gives us an O(1) search function
# for free: ifdef. Additionally, even m4 1.4.x gives us an O(1)
# insert operation for free: pushdef. But to use these, we must
# represent the set via a group of macros; to keep the set consistent,
# we must hide the set so that the user can only manipulate it through
# accessor macros. The contents of the set are maintained through two
# access points; _m4_set([name]) is a pushdef stack of values in the
# set, useful for O(n) traversal of the set contents; while the
# existence of _m4_set([name],value) with no particular value is
# useful for O(1) querying of set membership. And since the user
# cannot externally manipulate the set, we are free to add additional
# caching macros for other performance improvements. Deletion can be
# O(1) per element rather than O(n), by reworking the definition of
# _m4_set([name],value) to be 0 or 1 based on current membership, and
# adding _m4_set_cleanup(name) to defer the O(n) cleanup of
# _m4_set([name]) until we have another reason to do an O(n)
# traversal. The existence of _m4_set_cleanup(name) can then be used
# elsewhere to determine if we must dereference _m4_set([name],value),
# or assume that definition implies set membership. Finally, size can
# be tracked in an O(1) fashion with _m4_set_size(name).
#
# The quoting in _m4_set([name],value) is chosen so that there is no
# ambiguity with a set whose name contains a comma, and so that we can
# supply the value via _m4_defn([_m4_set([name])]) without needing any
# quote manipulation.
# m4_set_add(SET, VALUE, [IF-UNIQ], [IF-DUP])
# -------------------------------------------
# Add VALUE as an element of SET. Expand IF-UNIQ on the first
# addition, and IF-DUP if it is already in the set. Addition of one
# element is O(1), such that overall set creation is O(n).
#
# We do not want to add a duplicate for a previously deleted but
# unpruned element, but it is just as easy to check existence directly
# as it is to query _m4_set_cleanup($1).
m4_define([m4_set_add],
[m4_ifdef([_m4_set([$1],$2)],
[m4_if(m4_indir([_m4_set([$1],$2)]), [0],
[m4_define([_m4_set([$1],$2)],
[1])_m4_set_size([$1], [m4_incr])$3], [$4])],
[m4_define([_m4_set([$1],$2)],
[1])m4_pushdef([_m4_set([$1])],
[$2])_m4_set_size([$1], [m4_incr])$3])])
# m4_set_add_all(SET, VALUE...)
# -----------------------------
# Add each VALUE into SET. This is O(n) in the number of VALUEs, and
# can be faster than calling m4_set_add for each VALUE.
#
# Implement two recursion helpers; the check variant is slower but
# handles the case where an element has previously been removed but
# not pruned. The recursion helpers ignore their second argument, so
# that we can use the faster m4_shift2 and 2 arguments, rather than
# _m4_shift2 and one argument, as the signal to end recursion.
#
# Please keep foreach.m4 in sync with any adjustments made here.
m4_define([m4_set_add_all],
[m4_define([_m4_set_size($1)], m4_eval(m4_set_size([$1])
+ m4_len(m4_ifdef([_m4_set_cleanup($1)], [_$0_check], [_$0])([$1], $@))))])
m4_define([_m4_set_add_all],
[m4_if([$#], [2], [],
[m4_ifdef([_m4_set([$1],$3)], [],
[m4_define([_m4_set([$1],$3)], [1])m4_pushdef([_m4_set([$1])],
[$3])-])$0([$1], m4_shift2($@))])])
m4_define([_m4_set_add_all_check],
[m4_if([$#], [2], [],
[m4_set_add([$1], [$3])$0([$1], m4_shift2($@))])])
# m4_set_contains(SET, VALUE, [IF-PRESENT], [IF-ABSENT])
# ------------------------------------------------------
# Expand IF-PRESENT if SET contains VALUE, otherwise expand IF-ABSENT.
# This is always O(1).
m4_define([m4_set_contains],
[m4_ifdef([_m4_set_cleanup($1)],
[m4_if(m4_ifdef([_m4_set([$1],$2)],
[m4_indir([_m4_set([$1],$2)])], [0]), [1], [$3], [$4])],
[m4_ifdef([_m4_set([$1],$2)], [$3], [$4])])])
# m4_set_contents(SET, [SEP])
# ---------------------------
# Expand to a single string containing all the elements in SET,
# separated by SEP, without modifying SET. No provision is made for
# disambiguating set elements that contain non-empty SEP as a
# sub-string, or for recognizing a set that contains only the empty
# string. Order of the output is not guaranteed. If any elements
# have been previously removed from the set, this action will prune
# the unused memory. This is O(n) in the size of the set before
# pruning.
#
# Use _m4_popdef for speed. The existence of _m4_set_cleanup($1)
# determines which version of _1 helper we use.
m4_define([m4_set_contents],
[m4_set_map_sep([$1], [], [], [[$2]])])
# _m4_set_contents_1(SET)
# _m4_set_contents_1c(SET)
# _m4_set_contents_2(SET, [PRE], [POST], [SEP])
# ---------------------------------------------
# Expand to a list of quoted elements currently in the set, each
# surrounded by PRE and POST, and moving SEP in front of PRE on
# recursion. To avoid nesting limit restrictions, the algorithm must
# be broken into two parts; _1 destructively copies the stack in
# reverse into _m4_set_($1), producing no output; then _2
# destructively copies _m4_set_($1) back into the stack in reverse.
# If no elements were deleted, then this visits the set in the order
# that elements were inserted. Behavior is undefined if PRE/POST/SEP
# tries to recursively list or modify SET in any way other than
# calling m4_set_remove on the current element. Use _1 if all entries
# in the stack are guaranteed to be in the set, and _1c to prune
# removed entries. Uses _m4_defn and _m4_popdef for speed.
m4_define([_m4_set_contents_1],
[_m4_stack_reverse([_m4_set([$1])], [_m4_set_($1)])])
m4_define([_m4_set_contents_1c],
[m4_ifdef([_m4_set([$1])],
[m4_set_contains([$1], _m4_defn([_m4_set([$1])]),
[m4_pushdef([_m4_set_($1)], _m4_defn([_m4_set([$1])]))],
[_m4_popdef([_m4_set([$1],]_m4_defn(
[_m4_set([$1])])[)])])_m4_popdef([_m4_set([$1])])$0([$1])],
[_m4_popdef([_m4_set_cleanup($1)])])])
m4_define([_m4_set_contents_2],
[_m4_stack_reverse([_m4_set_($1)], [_m4_set([$1])],
[$2[]_m4_defn([_m4_set_($1)])$3], [$4[]])])
# m4_set_delete(SET)
# ------------------
# Delete all elements in SET, and reclaim any memory occupied by the
# set. This is O(n) in the set size.
#
# Use _m4_defn and _m4_popdef for speed.
m4_define([m4_set_delete],
[m4_ifdef([_m4_set([$1])],
[_m4_popdef([_m4_set([$1],]_m4_defn([_m4_set([$1])])[)],
[_m4_set([$1])])$0([$1])],
[m4_ifdef([_m4_set_cleanup($1)],
[_m4_popdef([_m4_set_cleanup($1)])])m4_ifdef(
[_m4_set_size($1)],
[_m4_popdef([_m4_set_size($1)])])])])
# m4_set_difference(SET1, SET2)
# -----------------------------
# Produce a LIST of quoted elements that occur in SET1 but not SET2.
# Output a comma prior to any elements, to distinguish the empty
# string from no elements. This can be directly used as a series of
# arguments, such as for m4_join, or wrapped inside quotes for use in
# m4_foreach. Order of the output is not guaranteed.
#
# Short-circuit the idempotence relation.
m4_define([m4_set_difference],
[m4_if([$1], [$2], [], [m4_set_map_sep([$1], [_$0([$2],], [)])])])
m4_define([_m4_set_difference],
[m4_set_contains([$1], [$2], [], [,[$2]])])
# m4_set_dump(SET, [SEP])
# -----------------------
# Expand to a single string containing all the elements in SET,
# separated by SEP, then delete SET. In general, if you only need to
# list the contents once, this is faster than m4_set_contents. No
# provision is made for disambiguating set elements that contain
# non-empty SEP as a sub-string. Order of the output is not
# guaranteed. This is O(n) in the size of the set before pruning.
#
# Use _m4_popdef for speed. Use existence of _m4_set_cleanup($1) to
# decide if more expensive recursion is needed.
m4_define([m4_set_dump],
[m4_ifdef([_m4_set_size($1)],
[_m4_popdef([_m4_set_size($1)])])m4_ifdef([_m4_set_cleanup($1)],
[_$0_check], [_$0])([$1], [], [$2])])
# _m4_set_dump(SET, [SEP], [PREP])
# _m4_set_dump_check(SET, [SEP], [PREP])
# --------------------------------------
# Print SEP and the current element, then delete the element and
# recurse with empty SEP changed to PREP. The check variant checks
# whether the element has been previously removed. Use _m4_defn and
# _m4_popdef for speed.
m4_define([_m4_set_dump],
[m4_ifdef([_m4_set([$1])],
[[$2]_m4_defn([_m4_set([$1])])_m4_popdef([_m4_set([$1],]_m4_defn(
[_m4_set([$1])])[)], [_m4_set([$1])])$0([$1], [$2$3])])])
m4_define([_m4_set_dump_check],
[m4_ifdef([_m4_set([$1])],
[m4_set_contains([$1], _m4_defn([_m4_set([$1])]),
[[$2]_m4_defn([_m4_set([$1])])])_m4_popdef(
[_m4_set([$1],]_m4_defn([_m4_set([$1])])[)],
[_m4_set([$1])])$0([$1], [$2$3])],
[_m4_popdef([_m4_set_cleanup($1)])])])
# m4_set_empty(SET, [IF-EMPTY], [IF-ELEMENTS])
# --------------------------------------------
# Expand IF-EMPTY if SET has no elements, otherwise IF-ELEMENTS.
m4_define([m4_set_empty],
[m4_ifdef([_m4_set_size($1)],
[m4_if(m4_indir([_m4_set_size($1)]), [0], [$2], [$3])], [$2])])
# m4_set_foreach(SET, VAR, ACTION)
# --------------------------------
# For each element of SET, define VAR to the element and expand
# ACTION. ACTION should not recursively list SET's contents, add
# elements to SET, nor delete any element from SET except the one
# currently in VAR. The order that the elements are visited in is not
# guaranteed. This is faster than the corresponding m4_foreach([VAR],
# m4_indir([m4_dquote]m4_set_listc([SET])), [ACTION])
m4_define([m4_set_foreach],
[m4_pushdef([$2])m4_set_map_sep([$1], [m4_define([$2],], [)$3])])
# m4_set_intersection(SET1, SET2)
# -------------------------------
# Produce a LIST of quoted elements that occur in both SET1 or SET2.
# Output a comma prior to any elements, to distinguish the empty
# string from no elements. This can be directly used as a series of
# arguments, such as for m4_join, or wrapped inside quotes for use in
# m4_foreach. Order of the output is not guaranteed.
#
# Iterate over the smaller set, and short-circuit the idempotence
# relation.
m4_define([m4_set_intersection],
[m4_if([$1], [$2], [m4_set_listc([$1])],
m4_eval(m4_set_size([$2]) < m4_set_size([$1])), [1], [$0([$2], [$1])],
[m4_set_map_sep([$1], [_$0([$2],], [)])])])
m4_define([_m4_set_intersection],
[m4_set_contains([$1], [$2], [,[$2]])])
# m4_set_list(SET)
# m4_set_listc(SET)
# -----------------
# Produce a LIST of quoted elements of SET. This can be directly used
# as a series of arguments, such as for m4_join or m4_set_add_all, or
# wrapped inside quotes for use in m4_foreach or m4_map. With
# m4_set_list, there is no way to distinguish an empty set from a set
# containing only the empty string; with m4_set_listc, a leading comma
# is output if there are any elements.
m4_define([m4_set_list],
[m4_set_map_sep([$1], [], [], [,])])
m4_define([m4_set_listc],
[m4_set_map_sep([$1], [,])])
# m4_set_map(SET, ACTION)
# -----------------------
# For each element of SET, expand ACTION with a single argument of the
# current element. ACTION should not recursively list SET's contents,
# add elements to SET, nor delete any element from SET except the one
# passed as an argument. The order that the elements are visited in
# is not guaranteed. This is faster than either of the corresponding
# m4_map_args([ACTION]m4_set_listc([SET]))
# m4_set_foreach([SET], [VAR], [ACTION(m4_defn([VAR]))])
m4_define([m4_set_map],
[m4_set_map_sep([$1], [$2(], [)])])
# m4_set_map_sep(SET, [PRE], [POST], [SEP])
# -----------------------------------------
# For each element of SET, expand PRE[value]POST[], and expand SEP
# between elements.
m4_define([m4_set_map_sep],
[m4_ifdef([_m4_set_cleanup($1)], [_m4_set_contents_1c],
[_m4_set_contents_1])([$1])_m4_set_contents_2($@)])
# m4_set_remove(SET, VALUE, [IF-PRESENT], [IF-ABSENT])
# ----------------------------------------------------
# If VALUE is an element of SET, delete it and expand IF-PRESENT.
# Otherwise expand IF-ABSENT. Deleting a single value is O(1),
# although it leaves memory occupied until the next O(n) traversal of
# the set which will compact the set.
#
# Optimize if the element being removed is the most recently added,
# since defining _m4_set_cleanup($1) slows down so many other macros.
# In particular, this plays well with m4_set_foreach and m4_set_map.
m4_define([m4_set_remove],
[m4_set_contains([$1], [$2], [_m4_set_size([$1],
[m4_decr])m4_if(_m4_defn([_m4_set([$1])]), [$2],
[_m4_popdef([_m4_set([$1],$2)], [_m4_set([$1])])],
[m4_define([_m4_set_cleanup($1)])m4_define(
[_m4_set([$1],$2)], [0])])$3], [$4])])
# m4_set_size(SET)
# ----------------
# Expand to the number of elements currently in SET. This operation
# is O(1), and thus more efficient than m4_count(m4_set_list([SET])).
m4_define([m4_set_size],
[m4_ifdef([_m4_set_size($1)], [m4_indir([_m4_set_size($1)])], [0])])
# _m4_set_size(SET, ACTION)
# -------------------------
# ACTION must be either m4_incr or m4_decr, and the size of SET is
# changed accordingly. If the set is empty, ACTION must not be
# m4_decr.
m4_define([_m4_set_size],
[m4_define([_m4_set_size($1)],
m4_ifdef([_m4_set_size($1)], [$2(m4_indir([_m4_set_size($1)]))],
[1]))])
# m4_set_union(SET1, SET2)
# ------------------------
# Produce a LIST of double quoted elements that occur in either SET1
# or SET2, without duplicates. Output a comma prior to any elements,
# to distinguish the empty string from no elements. This can be
# directly used as a series of arguments, such as for m4_join, or
# wrapped inside quotes for use in m4_foreach. Order of the output is
# not guaranteed.
#
# We can rely on the fact that m4_set_listc prunes SET1, so we don't
# need to check _m4_set([$1],element) for 0. Short-circuit the
# idempotence relation.
m4_define([m4_set_union],
[m4_set_listc([$1])m4_if([$1], [$2], [],
[m4_set_map_sep([$2], [_$0([$1],], [)])])])
m4_define([_m4_set_union],
[m4_ifdef([_m4_set([$1],$2)], [], [,[$2]])])
## ------------------- ##
## 16. File handling. ##
## ------------------- ##
# It is a real pity that M4 comes with no macros to bind a diversion
# to a file. So we have to deal without, which makes us a lot more
# fragile than we should.
# m4_file_append(FILE-NAME, CONTENT)
# ----------------------------------
m4_define([m4_file_append],
[m4_syscmd([cat >>$1 <<_m4eof
$2
_m4eof
])
m4_if(m4_sysval, [0], [],
[m4_fatal([$0: cannot write: $1])])])
## ------------------------ ##
## 17. Setting M4sugar up. ##
## ------------------------ ##
# _m4_divert_diversion should be defined.
m4_divert_push([KILL])
# m4_init
# -------
# Initialize the m4sugar language.
m4_define([m4_init],
[# All the M4sugar macros start with `m4_', except `dnl' kept as is
# for sake of simplicity.
m4_pattern_forbid([^_?m4_])
m4_pattern_forbid([^dnl$])
# If __m4_version__ is defined, we assume that we are being run by M4
# 1.6 or newer, thus $@ recursion is linear, and debugmode(+do)
# is available for faster checks of dereferencing undefined macros
# and forcing dumpdef to print to stderr regardless of debugfile.
# But if it is missing, we assume we are being run by M4 1.4.x, that
# $@ recursion is quadratic, and that we need foreach-based
# replacement macros. Also, m4 prior to 1.4.8 loses track of location
# during m4wrap text; __line__ should never be 0.
#
# Use the raw builtin to avoid tripping up include tracing.
# Meanwhile, avoid m4_copy, since it temporarily undefines m4_defn.
m4_ifdef([__m4_version__],
[m4_debugmode([+do])
m4_define([m4_defn], _m4_defn([_m4_defn]))
m4_define([m4_dumpdef], _m4_defn([_m4_dumpdef]))
m4_define([m4_popdef], _m4_defn([_m4_popdef]))
m4_define([m4_undefine], _m4_defn([_m4_undefine]))],
[m4_builtin([include], [m4sugar/foreach.m4])
m4_wrap_lifo([m4_if(__line__, [0], [m4_pushdef([m4_location],
]]m4_dquote(m4_dquote(m4_dquote(__file__:__line__)))[[)])])])
# Rewrite the first entry of the diversion stack.
m4_divert([KILL])
# Check the divert push/pop perfect balance.
# Some users are prone to also use m4_wrap to register last-minute
# m4_divert_text; so after our diversion cleanups, we restore
# KILL as the bottom of the diversion stack.
m4_wrap([m4_popdef([_m4_divert_diversion])m4_ifdef(
[_m4_divert_diversion], [m4_fatal([$0: unbalanced m4_divert_push:
]m4_divert_stack)])_m4_popdef([_m4_divert_stack])m4_divert_push([KILL])])
])
PK lCiZl9 9 m4sugar/foreach.m4nu [ # -*- Autoconf -*-
# This file is part of Autoconf.
# foreach-based replacements for recursive functions.
# Speeds up GNU M4 1.4.x by avoiding quadratic $@ recursion, but penalizes
# GNU M4 1.6 by requiring more memory and macro expansions.
#
# Copyright (C) 2008-2013 Free Software Foundation, Inc.
# This file is part of Autoconf. This program is free
# software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# Under Section 7 of GPL version 3, you are granted additional
# permissions described in the Autoconf Configure Script Exception,
# version 3.0, as published by the Free Software Foundation.
#
# You should have received a copy of the GNU General Public License
# and a copy of the Autoconf Configure Script Exception along with
# this program; see the files COPYINGv3 and COPYING.EXCEPTION
# respectively. If not, see .
# Written by Eric Blake.
# In M4 1.4.x, every byte of $@ is rescanned. This means that an
# algorithm on n arguments that recurses with one less argument each
# iteration will scan n * (n + 1) / 2 arguments, for O(n^2) time. In
# M4 1.6, this was fixed so that $@ is only scanned once, then
# back-references are made to information stored about the scan.
# Thus, n iterations need only scan n arguments, for O(n) time.
# Additionally, in M4 1.4.x, recursive algorithms did not clean up
# memory very well, requiring O(n^2) memory rather than O(n) for n
# iterations.
#
# This file is designed to overcome the quadratic nature of $@
# recursion by writing a variant of m4_foreach that uses m4_for rather
# than $@ recursion to operate on the list. This involves more macro
# expansions, but avoids the need to rescan a quadratic number of
# arguments, making these replacements very attractive for M4 1.4.x.
# On the other hand, in any version of M4, expanding additional macros
# costs additional time; therefore, in M4 1.6, where $@ recursion uses
# fewer macros, these replacements actually pessimize performance.
# Additionally, the use of $10 to mean the tenth argument violates
# POSIX; although all versions of m4 1.4.x support this meaning, a
# future m4 version may switch to take it as the first argument
# concatenated with a literal 0, so the implementations in this file
# are not future-proof. Thus, this file is conditionally included as
# part of m4_init(), only when it is detected that M4 probably has
# quadratic behavior (ie. it lacks the macro __m4_version__).
#
# Please keep this file in sync with m4sugar.m4.
# _m4_foreach(PRE, POST, IGNORED, ARG...)
# ---------------------------------------
# Form the common basis of the m4_foreach and m4_map macros. For each
# ARG, expand PRE[ARG]POST[]. The IGNORED argument makes recursion
# easier, and must be supplied rather than implicit.
#
# This version minimizes the number of times that $@ is evaluated by
# using m4_for to generate a boilerplate into _m4_f then passing $@ to
# that temporary macro. Thus, the recursion is done in m4_for without
# reparsing any user input, and is not quadratic. For an idea of how
# this works, note that m4_foreach(i,[1,2],[i]) calls
# _m4_foreach([m4_define([i],],[)i],[],[1],[2])
# which defines _m4_f:
# $1[$4]$2[]$1[$5]$2[]_m4_popdef([_m4_f])
# then calls _m4_f([m4_define([i],],[)i],[],[1],[2]) for a net result:
# m4_define([i],[1])i[]m4_define([i],[2])i[]_m4_popdef([_m4_f]).
m4_define([_m4_foreach],
[m4_if([$#], [3], [],
[m4_pushdef([_m4_f], _m4_for([4], [$#], [1],
[$0_([1], [2],], [)])[_m4_popdef([_m4_f])])_m4_f($@)])])
m4_define([_m4_foreach_],
[[$$1[$$3]$$2[]]])
# m4_case(SWITCH, VAL1, IF-VAL1, VAL2, IF-VAL2, ..., DEFAULT)
# -----------------------------------------------------------
# Find the first VAL that SWITCH matches, and expand the corresponding
# IF-VAL. If there are no matches, expand DEFAULT.
#
# Use m4_for to create a temporary macro in terms of a boilerplate
# m4_if with final cleanup. If $# is even, we have DEFAULT; if it is
# odd, then rounding the last $# up in the temporary macro is
# harmless. For example, both m4_case(1,2,3,4,5) and
# m4_case(1,2,3,4,5,6) result in the intermediate _m4_case being
# m4_if([$1],[$2],[$3],[$1],[$4],[$5],_m4_popdef([_m4_case])[$6])
m4_define([m4_case],
[m4_if(m4_eval([$# <= 2]), [1], [$2],
[m4_pushdef([_$0], [m4_if(]_m4_for([2], m4_eval([($# - 1) / 2 * 2]), [2],
[_$0_(], [)])[_m4_popdef(
[_$0])]m4_dquote($m4_eval([($# + 1) & ~1]))[)])_$0($@)])])
m4_define([_m4_case_],
[$0_([1], [$1], m4_incr([$1]))])
m4_define([_m4_case__],
[[[$$1],[$$2],[$$3],]])
# m4_bmatch(SWITCH, RE1, VAL1, RE2, VAL2, ..., DEFAULT)
# -----------------------------------------------------
# m4 equivalent of
#
# if (SWITCH =~ RE1)
# VAL1;
# elif (SWITCH =~ RE2)
# VAL2;
# elif ...
# ...
# else
# DEFAULT
#
# We build the temporary macro _m4_b:
# m4_define([_m4_b], _m4_defn([_m4_bmatch]))_m4_b([$1], [$2], [$3])...
# _m4_b([$1], [$m-1], [$m])_m4_b([], [], [$m+1]_m4_popdef([_m4_b]))
# then invoke m4_unquote(_m4_b($@)), for concatenation with later text.
m4_define([m4_bmatch],
[m4_if([$#], 0, [m4_fatal([$0: too few arguments: $#])],
[$#], 1, [m4_fatal([$0: too few arguments: $#: $1])],
[$#], 2, [$2],
[m4_pushdef([_m4_b], [m4_define([_m4_b],
_m4_defn([_$0]))]_m4_for([3], m4_eval([($# + 1) / 2 * 2 - 1]),
[2], [_$0_(], [)])[_m4_b([], [],]m4_dquote([$]m4_eval(
[($# + 1) / 2 * 2]))[_m4_popdef([_m4_b]))])m4_unquote(_m4_b($@))])])
m4_define([_m4_bmatch],
[m4_if(m4_bregexp([$1], [$2]), [-1], [], [[$3]m4_define([$0])])])
m4_define([_m4_bmatch_],
[$0_([1], m4_decr([$1]), [$1])])
m4_define([_m4_bmatch__],
[[_m4_b([$$1], [$$2], [$$3])]])
# m4_cond(TEST1, VAL1, IF-VAL1, TEST2, VAL2, IF-VAL2, ..., [DEFAULT])
# -------------------------------------------------------------------
# Similar to m4_if, except that each TEST is expanded when encountered.
# If the expansion of TESTn matches the string VALn, the result is IF-VALn.
# The result is DEFAULT if no tests passed. This macro allows
# short-circuiting of expensive tests, where it pays to arrange quick
# filter tests to run first.
#
# m4_cond already guarantees either 3*n or 3*n + 1 arguments, 1 <= n.
# We only have to speed up _m4_cond, by building the temporary _m4_c:
# m4_define([_m4_c], _m4_defn([m4_unquote]))_m4_c([m4_if(($1), [($2)],
# [[$3]m4_define([_m4_c])])])_m4_c([m4_if(($4), [($5)],
# [[$6]m4_define([_m4_c])])])..._m4_c([m4_if(($m-2), [($m-1)],
# [[$m]m4_define([_m4_c])])])_m4_c([[$m+1]]_m4_popdef([_m4_c]))
# We invoke m4_unquote(_m4_c($@)), for concatenation with later text.
m4_define([_m4_cond],
[m4_pushdef([_m4_c], [m4_define([_m4_c],
_m4_defn([m4_unquote]))]_m4_for([2], m4_eval([$# / 3 * 3 - 1]), [3],
[$0_(], [)])[_m4_c(]m4_dquote(m4_dquote(
[$]m4_eval([$# / 3 * 3 + 1])))[_m4_popdef([_m4_c]))])m4_unquote(_m4_c($@))])
m4_define([_m4_cond_],
[$0_(m4_decr([$1]), [$1], m4_incr([$1]))])
m4_define([_m4_cond__],
[[_m4_c([m4_if(($$1), [($$2)], [[$$3]m4_define([_m4_c])])])]])
# m4_bpatsubsts(STRING, RE1, SUBST1, RE2, SUBST2, ...)
# ----------------------------------------------------
# m4 equivalent of
#
# $_ = STRING;
# s/RE1/SUBST1/g;
# s/RE2/SUBST2/g;
# ...
#
# m4_bpatsubsts already validated an odd number of arguments; we only
# need to speed up _m4_bpatsubsts. To avoid nesting, we build the
# temporary _m4_p:
# m4_define([_m4_p], [$1])m4_define([_m4_p],
# m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$2], [$3]))m4_define([_m4_p],
# m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$4], [$5]))m4_define([_m4_p],...
# m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$m-1], [$m]))m4_unquote(
# _m4_defn([_m4_p])_m4_popdef([_m4_p]))
m4_define([_m4_bpatsubsts],
[m4_pushdef([_m4_p], [m4_define([_m4_p],
]m4_dquote([$]1)[)]_m4_for([3], [$#], [2], [$0_(],
[)])[m4_unquote(_m4_defn([_m4_p])_m4_popdef([_m4_p]))])_m4_p($@)])
m4_define([_m4_bpatsubsts_],
[$0_(m4_decr([$1]), [$1])])
m4_define([_m4_bpatsubsts__],
[[m4_define([_m4_p],
m4_bpatsubst(m4_dquote(_m4_defn([_m4_p])), [$$1], [$$2]))]])
# m4_shiftn(N, ...)
# -----------------
# Returns ... shifted N times. Useful for recursive "varargs" constructs.
#
# m4_shiftn already validated arguments; we only need to speed up
# _m4_shiftn. If N is 3, then we build the temporary _m4_s, defined as
# ,[$5],[$6],...,[$m]_m4_popdef([_m4_s])
# before calling m4_shift(_m4_s($@)).
m4_define([_m4_shiftn],
[m4_if(m4_incr([$1]), [$#], [], [m4_pushdef([_m4_s],
_m4_for(m4_eval([$1 + 2]), [$#], [1],
[[,]m4_dquote($], [)])[_m4_popdef([_m4_s])])m4_shift(_m4_s($@))])])
# m4_do(STRING, ...)
# ------------------
# This macro invokes all its arguments (in sequence, of course). It is
# useful for making your macros more structured and readable by dropping
# unnecessary dnl's and have the macros indented properly.
#
# Here, we use the temporary macro _m4_do, defined as
# $1[]$2[]...[]$n[]_m4_popdef([_m4_do])
m4_define([m4_do],
[m4_if([$#], [0], [],
[m4_pushdef([_$0], _m4_for([1], [$#], [1],
[$], [[[]]])[_m4_popdef([_$0])])_$0($@)])])
# m4_dquote_elt(ARGS)
# -------------------
# Return ARGS as an unquoted list of double-quoted arguments.
#
# _m4_foreach to the rescue.
m4_define([m4_dquote_elt],
[m4_if([$#], [0], [], [[[$1]]_m4_foreach([,m4_dquote(], [)], $@)])])
# m4_reverse(ARGS)
# ----------------
# Output ARGS in reverse order.
#
# Invoke _m4_r($@) with the temporary _m4_r built as
# [$m], [$m-1], ..., [$2], [$1]_m4_popdef([_m4_r])
m4_define([m4_reverse],
[m4_if([$#], [0], [], [$#], [1], [[$1]],
[m4_pushdef([_m4_r], [[$$#]]_m4_for(m4_decr([$#]), [1], [-1],
[[, ]m4_dquote($], [)])[_m4_popdef([_m4_r])])_m4_r($@)])])
# m4_map_args_pair(EXPRESSION, [END-EXPR = EXPRESSION], ARG...)
# -------------------------------------------------------------
# Perform a pairwise grouping of consecutive ARGs, by expanding
# EXPRESSION([ARG1], [ARG2]). If there are an odd number of ARGs, the
# final argument is expanded with END-EXPR([ARGn]).
#
# Build the temporary macro _m4_map_args_pair, with the $2([$m+1])
# only output if $# is odd:
# $1([$3], [$4])[]$1([$5], [$6])[]...$1([$m-1],
# [$m])[]m4_default([$2], [$1])([$m+1])[]_m4_popdef([_m4_map_args_pair])
m4_define([m4_map_args_pair],
[m4_if([$#], [0], [m4_fatal([$0: too few arguments: $#])],
[$#], [1], [m4_fatal([$0: too few arguments: $#: $1])],
[$#], [2], [],
[$#], [3], [m4_default([$2], [$1])([$3])[]],
[m4_pushdef([_$0], _m4_for([3],
m4_eval([$# / 2 * 2 - 1]), [2], [_$0_(], [)])_$0_end(
[1], [2], [$#])[_m4_popdef([_$0])])_$0($@)])])
m4_define([_m4_map_args_pair_],
[$0_([1], [$1], m4_incr([$1]))])
m4_define([_m4_map_args_pair__],
[[$$1([$$2], [$$3])[]]])
m4_define([_m4_map_args_pair_end],
[m4_if(m4_eval([$3 & 1]), [1], [[m4_default([$$2], [$$1])([$$3])[]]])])
# m4_join(SEP, ARG1, ARG2...)
# ---------------------------
# Produce ARG1SEPARG2...SEPARGn. Avoid back-to-back SEP when a given ARG
# is the empty string. No expansion is performed on SEP or ARGs.
#
# Use a self-modifying separator, since we don't know how many
# arguments might be skipped before a separator is first printed, but
# be careful if the separator contains $. _m4_foreach to the rescue.
m4_define([m4_join],
[m4_pushdef([_m4_sep], [m4_define([_m4_sep], _m4_defn([m4_echo]))])]dnl
[_m4_foreach([_$0([$1],], [)], $@)_m4_popdef([_m4_sep])])
m4_define([_m4_join],
[m4_if([$2], [], [], [_m4_sep([$1])[$2]])])
# m4_joinall(SEP, ARG1, ARG2...)
# ------------------------------
# Produce ARG1SEPARG2...SEPARGn. An empty ARG results in back-to-back SEP.
# No expansion is performed on SEP or ARGs.
#
# A bit easier than m4_join. _m4_foreach to the rescue.
m4_define([m4_joinall],
[[$2]m4_if(m4_eval([$# <= 2]), [1], [],
[_m4_foreach([$1], [], m4_shift($@))])])
# m4_list_cmp(A, B)
# -----------------
# Compare the two lists of integer expressions A and B.
#
# m4_list_cmp takes care of any side effects; we only override
# _m4_list_cmp_raw, where we can safely expand lists multiple times.
# First, insert padding so that both lists are the same length; the
# trailing +0 is necessary to handle a missing list. Next, create a
# temporary macro to perform pairwise comparisons until an inequality
# is found. For example, m4_list_cmp([1], [1,2]) creates _m4_cmp as
# m4_if(m4_eval([($1) != ($3)]), [1], [m4_cmp([$1], [$3])],
# m4_eval([($2) != ($4)]), [1], [m4_cmp([$2], [$4])],
# [0]_m4_popdef([_m4_cmp]))
# then calls _m4_cmp([1+0], [0*2], [1], [2+0])
m4_define([_m4_list_cmp_raw],
[m4_if([$1], [$2], 0,
[_m4_list_cmp($1+0_m4_list_pad(m4_count($1), m4_count($2)),
$2+0_m4_list_pad(m4_count($2), m4_count($1)))])])
m4_define([_m4_list_pad],
[m4_if(m4_eval($1 < $2), [1],
[_m4_for(m4_incr([$1]), [$2], [1], [,0*])])])
m4_define([_m4_list_cmp],
[m4_pushdef([_m4_cmp], [m4_if(]_m4_for(
[1], m4_eval([$# >> 1]), [1], [$0_(], [,]m4_eval([$# >> 1])[)])[
[0]_m4_popdef([_m4_cmp]))])_m4_cmp($@)])
m4_define([_m4_list_cmp_],
[$0_([$1], m4_eval([$1 + $2]))])
m4_define([_m4_list_cmp__],
[[m4_eval([($$1) != ($$2)]), [1], [m4_cmp([$$1], [$$2])],
]])
# m4_max(EXPR, ...)
# m4_min(EXPR, ...)
# -----------------
# Return the decimal value of the maximum (or minimum) in a series of
# integer expressions.
#
# _m4_foreach to the rescue; we only need to replace _m4_minmax. Here,
# we need a temporary macro to track the best answer so far, so that
# the foreach expression is tractable.
m4_define([_m4_minmax],
[m4_pushdef([_m4_best], m4_eval([$2]))_m4_foreach(
[m4_define([_m4_best], $1(_m4_best,], [))], m4_shift($@))]dnl
[_m4_best[]_m4_popdef([_m4_best])])
# m4_set_add_all(SET, VALUE...)
# -----------------------------
# Add each VALUE into SET. This is O(n) in the number of VALUEs, and
# can be faster than calling m4_set_add for each VALUE.
#
# _m4_foreach to the rescue. If no deletions have occurred, then
# avoid the speed penalty of m4_set_add.
m4_define([m4_set_add_all],
[m4_if([$#], [0], [], [$#], [1], [],
[m4_define([_m4_set_size($1)], m4_eval(m4_set_size([$1])
+ m4_len(_m4_foreach(m4_ifdef([_m4_set_cleanup($1)],
[[m4_set_add]], [[_$0]])[([$1],], [)], $@))))])])
m4_define([_m4_set_add_all],
[m4_ifdef([_m4_set([$1],$2)], [],
[m4_define([_m4_set([$1],$2)],
[1])m4_pushdef([_m4_set([$1])], [$2])-])])
PK lCiZW java-skel.m4nu [ -*- Autoconf -*-
# Java skeleton dispatching for Bison.
# Copyright (C) 2007, 2009-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
b4_glr_if( [b4_complain([%%glr-parser not supported for Java])])
b4_nondeterministic_if([b4_complain([%%nondeterministic-parser not supported for Java])])
m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[lalr1.java]])
m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
m4_include(b4_used_skeleton)
PK lCiZY쩉 lalr1.ccnu [ # C++ skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_include(b4_pkgdatadir/[c++.m4])
# api.value.type=variant is valid.
m4_define([b4_value_type_setup_variant])
# b4_integral_parser_table_declare(TABLE-NAME, CONTENT, COMMENT)
# --------------------------------------------------------------
# Declare "parser::yy_" whose contents is CONTENT.
m4_define([b4_integral_parser_table_declare],
[m4_ifval([$3], [b4_comment([$3], [ ])
])dnl
static const b4_int_type_for([$2]) yy$1_[[]];dnl
])
# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
# -------------------------------------------------------------
# Define "parser::yy_" whose contents is CONTENT.
m4_define([b4_integral_parser_table_define],
[ const b4_int_type_for([$2])
b4_parser_class_name::yy$1_[[]] =
{
$2
};dnl
])
# b4_symbol_value_template(VAL, [TYPE])
# -------------------------------------
# Same as b4_symbol_value, but used in a template method. It makes
# a difference when using variants. Note that b4_value_type_setup_union
# overrides b4_symbol_value, so we must override it again.
m4_copy([b4_symbol_value], [b4_symbol_value_template])
m4_append([b4_value_type_setup_union],
[m4_copy_force([b4_symbol_value_union], [b4_symbol_value_template])])
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $$.
m4_define([b4_lhs_value],
[b4_symbol_value([yylhs.value], [$1])])
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[yylhs.location])
# b4_rhs_data(RULE-LENGTH, NUM)
# -----------------------------
# Return the data corresponding to the symbol #NUM, where the current
# rule has RULE-LENGTH symbols on RHS.
m4_define([b4_rhs_data],
[yystack_@{b4_subtract($@)@}])
# b4_rhs_state(RULE-LENGTH, NUM)
# ------------------------------
# The state corresponding to the symbol #NUM, where the current
# rule has RULE-LENGTH symbols on RHS.
m4_define([b4_rhs_state],
[b4_rhs_data([$1], [$2]).state])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[b4_symbol_value([b4_rhs_data([$1], [$2]).value], [$3])])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[b4_rhs_data([$1], [$2]).location])
# b4_symbol_action(SYMBOL-NUM, KIND)
# ----------------------------------
# Run the action KIND (destructor or printer) for SYMBOL-NUM.
# Same as in C, but using references instead of pointers.
m4_define([b4_symbol_action],
[b4_symbol_if([$1], [has_$2],
[m4_pushdef([b4_symbol_value], m4_defn([b4_symbol_value_template]))[]dnl
b4_dollar_pushdef([yysym.value],
b4_symbol_if([$1], [has_type],
[m4_dquote(b4_symbol([$1], [type]))]),
[yysym.location])dnl
b4_symbol_case_([$1])
b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
b4_symbol([$1], [$2])
b4_syncline([@oline@], [@ofile@])
break;
m4_popdef([b4_symbol_value])[]dnl
b4_dollar_popdef[]dnl
])])
# b4_lex
# ------
# Call yylex.
m4_define([b4_lex],
[b4_token_ctor_if(
[b4_function_call([yylex],
[symbol_type], m4_ifdef([b4_lex_param], b4_lex_param))],
[b4_function_call([yylex], [int],
[b4_api_PREFIX[STYPE*], [&yyla.value]][]dnl
b4_locations_if([, [[location*], [&yyla.location]]])dnl
m4_ifdef([b4_lex_param], [, ]b4_lex_param))])])
m4_pushdef([b4_copyright_years],
[2002-2015])
m4_define([b4_parser_class_name],
[b4_percent_define_get([[parser_class_name]])])
b4_bison_locations_if([# Backward compatibility.
m4_define([b4_location_constructors])
m4_include(b4_pkgdatadir/[location.cc])])
m4_include(b4_pkgdatadir/[stack.hh])
b4_variant_if([m4_include(b4_pkgdatadir/[variant.hh])])
# b4_shared_declarations
# ----------------------
# Declaration that might either go into the header (if --defines)
# or open coded in the parser body.
m4_define([b4_shared_declarations],
[b4_percent_code_get([[requires]])[
]b4_parse_assert_if([# include ])[
# include // std::abort
# include
# include
# include
# include ]b4_defines_if([[
# include "stack.hh"
]b4_bison_locations_if([[# include "location.hh"]])])[
]b4_variant_if([b4_variant_includes])[
]b4_attribute_define[
]b4_YYDEBUG_define[
]b4_namespace_open[
]b4_defines_if([],
[b4_stack_define
b4_bison_locations_if([b4_position_define
b4_location_define])])[
]b4_variant_if([b4_variant_define])[
/// A Bison parser.
class ]b4_parser_class_name[
{
public:
]b4_public_types_declare[
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[);
virtual ~]b4_parser_class_name[ ();
/// Parse.
/// \returns 0 iff parsing succeeded.
virtual int parse ();
#if ]b4_api_PREFIX[DEBUG
/// The current debugging stream.
std::ostream& debug_stream () const YY_ATTRIBUTE_PURE;
/// Set the current debugging stream.
void set_debug_stream (std::ostream &);
/// Type for debugging levels.
typedef int debug_level_type;
/// The current debugging level.
debug_level_type debug_level () const YY_ATTRIBUTE_PURE;
/// Set the current debugging level.
void set_debug_level (debug_level_type l);
#endif
/// Report a syntax error.]b4_locations_if([[
/// \param loc where the syntax error is found.]])[
/// \param msg a description of the syntax error.
virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);
/// Report a syntax error.
void error (const syntax_error& err);
private:
/// This class is not copyable.
]b4_parser_class_name[ (const ]b4_parser_class_name[&);
]b4_parser_class_name[& operator= (const ]b4_parser_class_name[&);
/// State numbers.
typedef int state_type;
/// Generate an error message.
/// \param yystate the state where the error occurred.
/// \param yyla the lookahead token.
virtual std::string yysyntax_error_ (state_type yystate,
const symbol_type& yyla) const;
/// Compute post-reduction state.
/// \param yystate the current state
/// \param yysym the nonterminal to push on the stack
state_type yy_lr_goto_state_ (state_type yystate, int yysym);
/// Whether the given \c yypact_ value indicates a defaulted state.
/// \param yyvalue the value to check
static bool yy_pact_value_is_default_ (int yyvalue);
/// Whether the given \c yytable_ value indicates a syntax error.
/// \param yyvalue the value to check
static bool yy_table_value_is_error_ (int yyvalue);
static const ]b4_int_type(b4_pact_ninf, b4_pact_ninf)[ yypact_ninf_;
static const ]b4_int_type(b4_table_ninf, b4_table_ninf)[ yytable_ninf_;
/// Convert a scanner token number \a t to a symbol number.
static token_number_type yytranslate_ (]b4_token_ctor_if([token_type], [int])[ t);
// Tables.
]b4_parser_tables_declare[]b4_error_verbose_if([
/// Convert the symbol name \a n to a form suitable for a diagnostic.
static std::string yytnamerr_ (const char *n);])[
]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[
/// For a symbol, its name in clear.
static const char* const yytname_[];
]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[
]b4_integral_parser_table_declare([rline], [b4_rline],
[[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
/// Report on the debug stream that the rule \a r is going to be reduced.
virtual void yy_reduce_print_ (int r);
/// Print the state stack on the debug stream.
virtual void yystack_print_ ();
// Debugging.
int yydebug_;
std::ostream* yycdebug_;
/// \brief Display a symbol type, value and location.
/// \param yyo The output stream.
/// \param yysym The symbol.
template
void yy_print_ (std::ostream& yyo, const basic_symbol& yysym) const;
#endif
/// \brief Reclaim the memory associated to a symbol.
/// \param yymsg Why this token is reclaimed.
/// If null, print nothing.
/// \param yysym The symbol.
template
void yy_destroy_ (const char* yymsg, basic_symbol& yysym) const;
private:
/// Type access provider for state based symbols.
struct by_state
{
/// Default constructor.
by_state ();
/// The symbol type as needed by the constructor.
typedef state_type kind_type;
/// Constructor.
by_state (kind_type s);
/// Copy constructor.
by_state (const by_state& other);
/// Record that this symbol is empty.
void clear ();
/// Steal the symbol type from \a that.
void move (by_state& that);
/// The (internal) type number (corresponding to \a state).
/// \a empty_symbol when empty.
symbol_number_type type_get () const;
/// The state number used to denote an empty symbol.
enum { empty_state = -1 };
/// The state.
/// \a empty when empty.
state_type state;
};
/// "Internal" symbol: element of the stack.
struct stack_symbol_type : basic_symbol
{
/// Superclass.
typedef basic_symbol super_type;
/// Construct an empty symbol.
stack_symbol_type ();
/// Steal the contents from \a sym to build this.
stack_symbol_type (state_type s, symbol_type& sym);
/// Assignment, needed by push_back.
stack_symbol_type& operator= (const stack_symbol_type& that);
};
/// Stack type.
typedef stack stack_type;
/// The stack.
stack_type yystack_;
/// Push a new state on the stack.
/// \param m a debug message to display
/// if null, no trace is output.
/// \param s the symbol
/// \warning the contents of \a s.value is stolen.
void yypush_ (const char* m, stack_symbol_type& s);
/// Push a new look ahead token on the state on the stack.
/// \param m a debug message to display
/// if null, no trace is output.
/// \param s the state
/// \param sym the symbol (for its value and location).
/// \warning the contents of \a s.value is stolen.
void yypush_ (const char* m, state_type s, symbol_type& sym);
/// Pop \a n symbols the three stacks.
void yypop_ (unsigned int n = 1);
/// Constants.
enum
{
yyeof_ = 0,
yylast_ = ]b4_last[, ///< Last index in yytable_.
yynnts_ = ]b4_nterms_number[, ///< Number of nonterminal symbols.
yyfinal_ = ]b4_final_state_number[, ///< Termination state number.
yyterror_ = 1,
yyerrcode_ = 256,
yyntokens_ = ]b4_tokens_number[ ///< Number of tokens.
};
]b4_parse_param_vars[
};
]b4_token_ctor_if([b4_yytranslate_define
b4_public_types_define])[
]b4_namespace_close[
]b4_percent_define_flag_if([[global_tokens_and_yystype]],
[b4_token_defines
#ifndef ]b4_api_PREFIX[STYPE
// Redirection for backward compatibility.
# define ]b4_api_PREFIX[STYPE b4_namespace_ref::b4_parser_class_name::semantic_type
#endif
])[
]b4_percent_code_get([[provides]])[
]])
b4_defines_if(
[b4_output_begin([b4_spec_defines_file])
b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++])
[
/**
** \file ]b4_spec_defines_file[
** Define the ]b4_namespace_ref[::parser class.
*/
// C++ LALR(1) parser skeleton written by Akim Demaille.
]b4_cpp_guard_open([b4_spec_defines_file])[
]b4_shared_declarations[
]b4_cpp_guard_close([b4_spec_defines_file])
b4_output_end()
])
b4_output_begin([b4_parser_file_name])
b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++])
b4_percent_code_get([[top]])[]dnl
m4_if(b4_prefix, [yy], [],
[
// Take the name prefix into account.
#define yylex b4_prefix[]lex])[
// First part of user declarations.
]b4_user_pre_prologue[
]b4_null_define[
]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
[b4_shared_declarations])[
// User implementation prologue.
]b4_user_post_prologue[
]b4_percent_code_get[
#ifndef YY_
# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include // FIXME: INFRINGES ON USER NAME SPACE.
# define YY_(msgid) dgettext ("bison-runtime", msgid)
# endif
# endif
# ifndef YY_
# define YY_(msgid) msgid
# endif
#endif
]b4_locations_if([dnl
[#define YYRHSLOC(Rhs, K) ((Rhs)[K].location)
]b4_yylloc_default_define])[
// Suppress unused-variable warnings by "using" E.
#define YYUSE(E) ((void) (E))
// Enable debugging if requested.
#if ]b4_api_PREFIX[DEBUG
// A pseudo ostream that takes yydebug_ into account.
# define YYCDEBUG if (yydebug_) (*yycdebug_)
# define YY_SYMBOL_PRINT(Title, Symbol) \
do { \
if (yydebug_) \
{ \
*yycdebug_ << Title << ' '; \
yy_print_ (*yycdebug_, Symbol); \
*yycdebug_ << std::endl; \
} \
} while (false)
# define YY_REDUCE_PRINT(Rule) \
do { \
if (yydebug_) \
yy_reduce_print_ (Rule); \
} while (false)
# define YY_STACK_PRINT() \
do { \
if (yydebug_) \
yystack_print_ (); \
} while (false)
#else // !]b4_api_PREFIX[DEBUG
# define YYCDEBUG if (false) std::cerr
# define YY_SYMBOL_PRINT(Title, Symbol) YYUSE(Symbol)
# define YY_REDUCE_PRINT(Rule) static_cast(0)
# define YY_STACK_PRINT() static_cast(0)
#endif // !]b4_api_PREFIX[DEBUG
#define yyerrok (yyerrstatus_ = 0)
#define yyclearin (yyla.clear ())
#define YYACCEPT goto yyacceptlab
#define YYABORT goto yyabortlab
#define YYERROR goto yyerrorlab
#define YYRECOVERING() (!!yyerrstatus_)
]b4_namespace_open[]b4_error_verbose_if([[
/* Return YYSTR after stripping away unnecessary quotes and
backslashes, so that it's suitable for yyerror. The heuristic is
that double-quoting is unnecessary unless the string contains an
apostrophe, a comma, or backslash (other than backslash-backslash).
YYSTR is taken from yytname. */
std::string
]b4_parser_class_name[::yytnamerr_ (const char *yystr)
{
if (*yystr == '"')
{
std::string yyr = "";
char const *yyp = yystr;
for (;;)
switch (*++yyp)
{
case '\'':
case ',':
goto do_not_strip_quotes;
case '\\':
if (*++yyp != '\\')
goto do_not_strip_quotes;
// Fall through.
default:
yyr += *yyp;
break;
case '"':
return yyr;
}
do_not_strip_quotes: ;
}
return yystr;
}
]])[
/// Build a parser object.
]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
:])[
#if ]b4_api_PREFIX[DEBUG
]m4_ifset([b4_parse_param], [ ], [ :])[yydebug_ (false),
yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
#endif]b4_parse_param_cons[
{}
]b4_parser_class_name::~b4_parser_class_name[ ()
{}
/*---------------.
| Symbol types. |
`---------------*/
]b4_token_ctor_if([], [b4_public_types_define])[
// by_state.
inline
]b4_parser_class_name[::by_state::by_state ()
: state (empty_state)
{}
inline
]b4_parser_class_name[::by_state::by_state (const by_state& other)
: state (other.state)
{}
inline
void
]b4_parser_class_name[::by_state::clear ()
{
state = empty_state;
}
inline
void
]b4_parser_class_name[::by_state::move (by_state& that)
{
state = that.state;
that.clear ();
}
inline
]b4_parser_class_name[::by_state::by_state (state_type s)
: state (s)
{}
inline
]b4_parser_class_name[::symbol_number_type
]b4_parser_class_name[::by_state::type_get () const
{
if (state == empty_state)
return empty_symbol;
else
return yystos_[state];
}
inline
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type ()
{}
inline
]b4_parser_class_name[::stack_symbol_type::stack_symbol_type (state_type s, symbol_type& that)
: super_type (s]b4_locations_if([, that.location])[)
{
]b4_variant_if([b4_symbol_variant([that.type_get ()],
[value], [move], [that.value])],
[[value = that.value;]])[
// that is emptied.
that.type = empty_symbol;
}
inline
]b4_parser_class_name[::stack_symbol_type&
]b4_parser_class_name[::stack_symbol_type::operator= (const stack_symbol_type& that)
{
state = that.state;
]b4_variant_if([b4_symbol_variant([that.type_get ()],
[value], [copy], [that.value])],
[[value = that.value;]])[]b4_locations_if([
location = that.location;])[
return *this;
}
template
inline
void
]b4_parser_class_name[::yy_destroy_ (const char* yymsg, basic_symbol& yysym) const
{
if (yymsg)
YY_SYMBOL_PRINT (yymsg, yysym);]b4_variant_if([], [
// User destructor.
b4_symbol_actions([destructor], [yysym.type_get ()])])[
}
#if ]b4_api_PREFIX[DEBUG
template
void
]b4_parser_class_name[::yy_print_ (std::ostream& yyo,
const basic_symbol& yysym) const
{
std::ostream& yyoutput = yyo;
YYUSE (yyoutput);
symbol_number_type yytype = yysym.type_get ();
// Avoid a (spurious) G++ 4.8 warning about "array subscript is
// below array bounds".
if (yysym.empty ())
std::abort ();
yyo << (yytype < yyntokens_ ? "token" : "nterm")
<< ' ' << yytname_[yytype] << " ("]b4_locations_if([
<< yysym.location << ": "])[;
]b4_symbol_actions([printer])[
yyo << ')';
}
#endif
inline
void
]b4_parser_class_name[::yypush_ (const char* m, state_type s, symbol_type& sym)
{
stack_symbol_type t (s, sym);
yypush_ (m, t);
}
inline
void
]b4_parser_class_name[::yypush_ (const char* m, stack_symbol_type& s)
{
if (m)
YY_SYMBOL_PRINT (m, s);
yystack_.push (s);
}
inline
void
]b4_parser_class_name[::yypop_ (unsigned int n)
{
yystack_.pop (n);
}
#if ]b4_api_PREFIX[DEBUG
std::ostream&
]b4_parser_class_name[::debug_stream () const
{
return *yycdebug_;
}
void
]b4_parser_class_name[::set_debug_stream (std::ostream& o)
{
yycdebug_ = &o;
}
]b4_parser_class_name[::debug_level_type
]b4_parser_class_name[::debug_level () const
{
return yydebug_;
}
void
]b4_parser_class_name[::set_debug_level (debug_level_type l)
{
yydebug_ = l;
}
#endif // ]b4_api_PREFIX[DEBUG
inline ]b4_parser_class_name[::state_type
]b4_parser_class_name[::yy_lr_goto_state_ (state_type yystate, int yysym)
{
int yyr = yypgoto_[yysym - yyntokens_] + yystate;
if (0 <= yyr && yyr <= yylast_ && yycheck_[yyr] == yystate)
return yytable_[yyr];
else
return yydefgoto_[yysym - yyntokens_];
}
inline bool
]b4_parser_class_name[::yy_pact_value_is_default_ (int yyvalue)
{
return yyvalue == yypact_ninf_;
}
inline bool
]b4_parser_class_name[::yy_table_value_is_error_ (int yyvalue)
{
return yyvalue == yytable_ninf_;
}
int
]b4_parser_class_name[::parse ()
{
// State.
int yyn;
/// Length of the RHS of the rule being reduced.
int yylen = 0;
// Error handling.
int yynerrs_ = 0;
int yyerrstatus_ = 0;
/// The lookahead symbol.
symbol_type yyla;]b4_locations_if([[
/// The locations where the error started and ended.
stack_symbol_type yyerror_range[3];]])[
/// The return value of parse ().
int yyresult;
// FIXME: This shoud be completely indented. It is not yet to
// avoid gratuitous conflicts when merging into the master branch.
try
{
YYCDEBUG << "Starting parse" << std::endl;
]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([yyla.value], [], [yyla.location])dnl
// User initialization code.
b4_user_initial_action
b4_dollar_popdef])[]dnl
[ /* Initialize the stack. The initial state will be set in
yynewstate, since the latter expects the semantical and the
location values to have been already stored, initialize these
stacks with a primary value. */
yystack_.clear ();
yypush_ (YY_NULLPTR, 0, yyla);
// A new symbol was pushed on the stack.
yynewstate:
YYCDEBUG << "Entering state " << yystack_[0].state << std::endl;
// Accept?
if (yystack_[0].state == yyfinal_)
goto yyacceptlab;
goto yybackup;
// Backup.
yybackup:
// Try to take a decision without lookahead.
yyn = yypact_[yystack_[0].state];
if (yy_pact_value_is_default_ (yyn))
goto yydefault;
// Read a lookahead token.
if (yyla.empty ())
{
YYCDEBUG << "Reading a token: ";
try
{]b4_token_ctor_if([[
symbol_type yylookahead (]b4_lex[);
yyla.move (yylookahead);]], [[
yyla.type = yytranslate_ (]b4_lex[);]])[
}
catch (const syntax_error& yyexc)
{
error (yyexc);
goto yyerrlab1;
}
}
YY_SYMBOL_PRINT ("Next token is", yyla);
/* If the proper action on seeing token YYLA.TYPE is to reduce or
to detect an error, take that action. */
yyn += yyla.type_get ();
if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yyla.type_get ())
goto yydefault;
// Reduce or error.
yyn = yytable_[yyn];
if (yyn <= 0)
{
if (yy_table_value_is_error_ (yyn))
goto yyerrlab;
yyn = -yyn;
goto yyreduce;
}
// Count tokens shifted since error; after three, turn off error status.
if (yyerrstatus_)
--yyerrstatus_;
// Shift the lookahead token.
yypush_ ("Shifting", yyn, yyla);
goto yynewstate;
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
yydefault:
yyn = yydefact_[yystack_[0].state];
if (yyn == 0)
goto yyerrlab;
goto yyreduce;
/*-----------------------------.
| yyreduce -- Do a reduction. |
`-----------------------------*/
yyreduce:
yylen = yyr2_[yyn];
{
stack_symbol_type yylhs;
yylhs.state = yy_lr_goto_state_(yystack_[yylen].state, yyr1_[yyn]);]b4_variant_if([
/* Variants are always initialized to an empty instance of the
correct type. The default '$$ = $1' action is NOT applied
when using variants. */
b4_symbol_variant([[yyr1_@{yyn@}]], [yylhs.value], [build])], [
/* If YYLEN is nonzero, implement the default value of the
action: '$$ = $1'. Otherwise, use the top of the stack.
Otherwise, the following line sets YYLHS.VALUE to garbage.
This behavior is undocumented and Bison users should not rely
upon it. */
if (yylen)
yylhs.value = yystack_@{yylen - 1@}.value;
else
yylhs.value = yystack_@{0@}.value;])[
]b4_locations_if([dnl
[
// Compute the default @@$.
{
slice slice (yystack_, yylen);
YYLLOC_DEFAULT (yylhs.location, slice, yylen);
}]])[
// Perform the reduction.
YY_REDUCE_PRINT (yyn);
try
{
switch (yyn)
{
]b4_user_actions[
default:
break;
}
}
catch (const syntax_error& yyexc)
{
error (yyexc);
YYERROR;
}
YY_SYMBOL_PRINT ("-> $$ =", yylhs);
yypop_ (yylen);
yylen = 0;
YY_STACK_PRINT ();
// Shift the result of the reduction.
yypush_ (YY_NULLPTR, yylhs);
}
goto yynewstate;
/*--------------------------------------.
| yyerrlab -- here on detecting error. |
`--------------------------------------*/
yyerrlab:
// If not already recovering from an error, report this error.
if (!yyerrstatus_)
{
++yynerrs_;
error (]b4_join(b4_locations_if([yyla.location]),
[[yysyntax_error_ (yystack_[0].state, yyla)]])[);
}
]b4_locations_if([[
yyerror_range[1].location = yyla.location;]])[
if (yyerrstatus_ == 3)
{
/* If just tried and failed to reuse lookahead token after an
error, discard it. */
// Return failure if at end of input.
if (yyla.type_get () == yyeof_)
YYABORT;
else if (!yyla.empty ())
{
yy_destroy_ ("Error: discarding", yyla);
yyla.clear ();
}
}
// Else will try to reuse lookahead token after shifting the error token.
goto yyerrlab1;
/*---------------------------------------------------.
| yyerrorlab -- error raised explicitly by YYERROR. |
`---------------------------------------------------*/
yyerrorlab:
/* Pacify compilers like GCC when the user code never invokes
YYERROR and the label yyerrorlab therefore never appears in user
code. */
if (false)
goto yyerrorlab;]b4_locations_if([[
yyerror_range[1].location = yystack_[yylen - 1].location;]])[
/* Do not reclaim the symbols of the rule whose action triggered
this YYERROR. */
yypop_ (yylen);
yylen = 0;
goto yyerrlab1;
/*-------------------------------------------------------------.
| yyerrlab1 -- common code for both syntax error and YYERROR. |
`-------------------------------------------------------------*/
yyerrlab1:
yyerrstatus_ = 3; // Each real token shifted decrements this.
{
stack_symbol_type error_token;
for (;;)
{
yyn = yypact_[yystack_[0].state];
if (!yy_pact_value_is_default_ (yyn))
{
yyn += yyterror_;
if (0 <= yyn && yyn <= yylast_ && yycheck_[yyn] == yyterror_)
{
yyn = yytable_[yyn];
if (0 < yyn)
break;
}
}
// Pop the current state because it cannot handle the error token.
if (yystack_.size () == 1)
YYABORT;
]b4_locations_if([[
yyerror_range[1].location = yystack_[0].location;]])[
yy_destroy_ ("Error: popping", yystack_[0]);
yypop_ ();
YY_STACK_PRINT ();
}
]b4_locations_if([[
yyerror_range[2].location = yyla.location;
YYLLOC_DEFAULT (error_token.location, yyerror_range, 2);]])[
// Shift the error token.
error_token.state = yyn;
yypush_ ("Shifting", error_token);
}
goto yynewstate;
// Accept.
yyacceptlab:
yyresult = 0;
goto yyreturn;
// Abort.
yyabortlab:
yyresult = 1;
goto yyreturn;
yyreturn:
if (!yyla.empty ())
yy_destroy_ ("Cleanup: discarding lookahead", yyla);
/* Do not reclaim the symbols of the rule whose action triggered
this YYABORT or YYACCEPT. */
yypop_ (yylen);
while (1 < yystack_.size ())
{
yy_destroy_ ("Cleanup: popping", yystack_[0]);
yypop_ ();
}
return yyresult;
}
catch (...)
{
YYCDEBUG << "Exception caught: cleaning lookahead and stack"
<< std::endl;
// Do not try to display the values of the reclaimed symbols,
// as their printer might throw an exception.
if (!yyla.empty ())
yy_destroy_ (YY_NULLPTR, yyla);
while (1 < yystack_.size ())
{
yy_destroy_ (YY_NULLPTR, yystack_[0]);
yypop_ ();
}
throw;
}
}
void
]b4_parser_class_name[::error (const syntax_error& yyexc)
{
error (]b4_join(b4_locations_if([yyexc.location]),
[[yyexc.what()]])[);
}
// Generate an error message.
std::string
]b4_parser_class_name[::yysyntax_error_ (]dnl
b4_error_verbose_if([state_type yystate, const symbol_type& yyla],
[state_type, const symbol_type&])[) const
{]b4_error_verbose_if([[
// Number of reported tokens (one for the "unexpected", one per
// "expected").
size_t yycount = 0;
// Its maximum.
enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
// Arguments of yyformat.
char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
/* There are many possibilities here to consider:
- If this state is a consistent state with a default action, then
the only way this function was invoked is if the default action
is an error action. In that case, don't check for expected
tokens because there are none.
- The only way there can be no lookahead present (in yyla) is
if this state is a consistent state with a default action.
Thus, detecting the absence of a lookahead is sufficient to
determine that there is no unexpected or expected token to
report. In that case, just report a simple "syntax error".
- Don't assume there isn't a lookahead just because this state is
a consistent state with a default action. There might have
been a previous inconsistent state, consistent state with a
non-default action, or user semantic action that manipulated
yyla. (However, yyla is currently not documented for users.)
- Of course, the expected token list depends on states to have
correct lookahead information, and it depends on the parser not
to perform extra reductions after fetching a lookahead from the
scanner and before detecting a syntax error. Thus, state
merging (from LALR or IELR) and default reductions corrupt the
expected token list. However, the list is correct for
canonical LR with one exception: it will still contain any
token that will not be accepted due to an error action in a
later state.
*/
if (!yyla.empty ())
{
int yytoken = yyla.type_get ();
yyarg[yycount++] = yytname_[yytoken];
int yyn = yypact_[yystate];
if (!yy_pact_value_is_default_ (yyn))
{
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. In other words, skip the first -YYN actions for
this state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
// Stay within bounds of both yycheck and yytname.
int yychecklim = yylast_ - yyn + 1;
int yyxend = yychecklim < yyntokens_ ? yychecklim : yyntokens_;
for (int yyx = yyxbegin; yyx < yyxend; ++yyx)
if (yycheck_[yyx + yyn] == yyx && yyx != yyterror_
&& !yy_table_value_is_error_ (yytable_[yyx + yyn]))
{
if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
yycount = 1;
break;
}
else
yyarg[yycount++] = yytname_[yyx];
}
}
}
char const* yyformat = YY_NULLPTR;
switch (yycount)
{
#define YYCASE_(N, S) \
case N: \
yyformat = S; \
break
YYCASE_(0, YY_("syntax error"));
YYCASE_(1, YY_("syntax error, unexpected %s"));
YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
#undef YYCASE_
}
std::string yyres;
// Argument number.
size_t yyi = 0;
for (char const* yyp = yyformat; *yyp; ++yyp)
if (yyp[0] == '%' && yyp[1] == 's' && yyi < yycount)
{
yyres += yytnamerr_ (yyarg[yyi++]);
++yyp;
}
else
yyres += *yyp;
return yyres;]], [[
return YY_("syntax error");]])[
}
const ]b4_int_type(b4_pact_ninf, b4_pact_ninf) b4_parser_class_name::yypact_ninf_ = b4_pact_ninf[;
const ]b4_int_type(b4_table_ninf, b4_table_ninf) b4_parser_class_name::yytable_ninf_ = b4_table_ninf[;
]b4_parser_tables_define[
]b4_token_table_if([], [[#if ]b4_api_PREFIX[DEBUG]])[
// YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
// First, the terminals, then, starting at \a yyntokens_, nonterminals.
const char*
const ]b4_parser_class_name[::yytname_[] =
{
]b4_tname[
};
]b4_token_table_if([[#if ]b4_api_PREFIX[DEBUG]])[
]b4_integral_parser_table_define([rline], [b4_rline])[
// Print the state stack on the debug stream.
void
]b4_parser_class_name[::yystack_print_ ()
{
*yycdebug_ << "Stack now";
for (stack_type::const_iterator
i = yystack_.begin (),
i_end = yystack_.end ();
i != i_end; ++i)
*yycdebug_ << ' ' << i->state;
*yycdebug_ << std::endl;
}
// Report on the debug stream that the rule \a yyrule is going to be reduced.
void
]b4_parser_class_name[::yy_reduce_print_ (int yyrule)
{
unsigned int yylno = yyrline_[yyrule];
int yynrhs = yyr2_[yyrule];
// Print the symbols being reduced, and their result.
*yycdebug_ << "Reducing stack by rule " << yyrule - 1
<< " (line " << yylno << "):" << std::endl;
// The symbols being reduced.
for (int yyi = 0; yyi < yynrhs; yyi++)
YY_SYMBOL_PRINT (" $" << yyi + 1 << " =",
]b4_rhs_data(yynrhs, yyi + 1)[);
}
#endif // ]b4_api_PREFIX[DEBUG
]b4_token_ctor_if([], [b4_yytranslate_define])[
]b4_namespace_close[
]b4_epilogue[]dnl
b4_output_end()
m4_popdef([b4_copyright_years])dnl
PK lCiZ~~ ~ c++-skel.m4nu [ -*- Autoconf -*-
# C++ skeleton dispatching for Bison.
# Copyright (C) 2006-2007, 2009-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
b4_glr_if( [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.cc]])])
b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.cc]])])
m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[lalr1.cc]])
m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
m4_include(b4_used_skeleton)
PK lCiZ_x x c-skel.m4nu [ -*- Autoconf -*-
# C skeleton dispatching for Bison.
# Copyright (C) 2006-2007, 2009-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
b4_glr_if( [m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])])
b4_nondeterministic_if([m4_define([b4_used_skeleton], [b4_pkgdatadir/[glr.c]])])
m4_define_default([b4_used_skeleton], [b4_pkgdatadir/[yacc.c]])
m4_define_default([b4_skeleton], ["b4_basename(b4_used_skeleton)"])
m4_include(b4_used_skeleton)
PK lCiZ Lb Lb c.m4nu [ -*- Autoconf -*-
# C M4 Macros for Bison.
# Copyright (C) 2002, 2004-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_include(b4_pkgdatadir/[c-like.m4])
# b4_tocpp(STRING)
# ----------------
# Convert STRING into a valid C macro name.
m4_define([b4_tocpp],
[m4_toupper(m4_bpatsubst(m4_quote($1), [[^a-zA-Z0-9]+], [_]))])
# b4_cpp_guard(FILE)
# ------------------
# A valid C macro name to use as a CPP header guard for FILE.
m4_define([b4_cpp_guard],
[[YY_]b4_tocpp(m4_defn([b4_prefix])/[$1])[_INCLUDED]])
# b4_cpp_guard_open(FILE)
# b4_cpp_guard_close(FILE)
# ------------------------
# If FILE does not expand to nothing, open/close CPP inclusion guards for FILE.
m4_define([b4_cpp_guard_open],
[m4_ifval(m4_quote($1),
[#ifndef b4_cpp_guard([$1])
# define b4_cpp_guard([$1])])])
m4_define([b4_cpp_guard_close],
[m4_ifval(m4_quote($1),
[#endif b4_comment([!b4_cpp_guard([$1])])])])
## ---------------- ##
## Identification. ##
## ---------------- ##
# b4_identification
# -----------------
# Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
# b4_pull_flag if they use the values of the %define variables api.pure or
# api.push-pull.
m4_define([b4_identification],
[[/* Identify Bison output. */
#define YYBISON 1
/* Bison version. */
#define YYBISON_VERSION "]b4_version["
/* Skeleton name. */
#define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
/* Pure parsers. */
#define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
/* Push parsers. */
#define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
/* Pull parsers. */
#define YYPULL ]b4_pull_flag])[
]])
## ---------------- ##
## Default values. ##
## ---------------- ##
# b4_api_prefix, b4_api_PREFIX
# ----------------------------
# Corresponds to %define api.prefix
b4_percent_define_default([[api.prefix]], [[yy]])
m4_define([b4_api_prefix],
[b4_percent_define_get([[api.prefix]])])
m4_define([b4_api_PREFIX],
[m4_toupper(b4_api_prefix)])
# b4_prefix
# ---------
# If the %name-prefix is not given, it is api.prefix.
m4_define_default([b4_prefix], [b4_api_prefix])
# If the %union is not named, its name is YYSTYPE.
b4_percent_define_default([[api.value.union.name]],
[b4_api_PREFIX[][STYPE]])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
# b4_lex_formals
# --------------
# All the yylex formal arguments.
# b4_lex_param arrives quoted twice, but we want to keep only one level.
m4_define([b4_lex_formals],
[b4_pure_if([[[[YYSTYPE *yylvalp]], [[&yylval]]][]dnl
b4_locations_if([, [[YYLTYPE *yyllocp], [&yylloc]]])])dnl
m4_ifdef([b4_lex_param], [, ]b4_lex_param)])
# b4_lex
# ------
# Call yylex.
m4_define([b4_lex],
[b4_function_call([yylex], [int], b4_lex_formals)])
# b4_user_args
# ------------
m4_define([b4_user_args],
[m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])])
# b4_parse_param
# --------------
# If defined, b4_parse_param arrives double quoted, but below we prefer
# it to be single quoted.
m4_define([b4_parse_param],
b4_parse_param)
# b4_parse_param_for(DECL, FORMAL, BODY)
# ---------------------------------------
# Iterate over the user parameters, binding the declaration to DECL,
# the formal name to FORMAL, and evaluating the BODY.
m4_define([b4_parse_param_for],
[m4_foreach([$1_$2], m4_defn([b4_parse_param]),
[m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
m4_pushdef([$2], m4_shift($1_$2))dnl
$3[]dnl
m4_popdef([$2])dnl
m4_popdef([$1])dnl
])])
# b4_parse_param_use([VAL], [LOC])
# --------------------------------
# 'YYUSE' VAL, LOC if locations are enabled, and all the parse-params.
m4_define([b4_parse_param_use],
[m4_ifvaln([$1], [ YYUSE ([$1]);])dnl
b4_locations_if([m4_ifvaln([$2], [ YYUSE ([$2]);])])dnl
b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
])dnl
])
## ------------ ##
## Data Types. ##
## ------------ ##
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# MIN to MAX (included).
m4_define([b4_int_type],
[m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
b4_ints_in($@, [-128], [127]), [1], [signed char],
b4_ints_in($@, [0], [65535]), [1], [unsigned short int],
b4_ints_in($@, [-32768], [32767]), [1], [short int],
m4_eval([0 <= $1]), [1], [unsigned int],
[int])])
# b4_int_type_for(NAME)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# 'NAME_min' to 'NAME_max' (included).
m4_define([b4_int_type_for],
[b4_int_type($1_min, $1_max)])
# b4_table_value_equals(TABLE, VALUE, LITERAL)
# --------------------------------------------
# Without inducing a comparison warning from the compiler, check if the
# literal value LITERAL equals VALUE from table TABLE, which must have
# TABLE_min and TABLE_max defined.
m4_define([b4_table_value_equals],
[m4_if(m4_eval($3 < m4_indir([b4_]$1[_min])
|| m4_indir([b4_]$1[_max]) < $3), [1],
[[0]],
[(!!(($2) == ($3)))])])
## ----------------- ##
## Compiler issues. ##
## ----------------- ##
# b4_attribute_define
# -------------------
# Provide portable compiler "attributes".
m4_define([b4_attribute_define],
[#ifndef YY_ATTRIBUTE
# if (defined __GNUC__ \
&& (2 < __GNUC__ || (__GNUC__ == 2 && 96 <= __GNUC_MINOR__))) \
|| defined __SUNPRO_C && 0x5110 <= __SUNPRO_C
# define YY_ATTRIBUTE(Spec) __attribute__(Spec)
# else
# define YY_ATTRIBUTE(Spec) /* empty */
# endif
#endif
#ifndef YY_ATTRIBUTE_PURE
# define YY_ATTRIBUTE_PURE YY_ATTRIBUTE ((__pure__))
#endif
#ifndef YY_ATTRIBUTE_UNUSED
# define YY_ATTRIBUTE_UNUSED YY_ATTRIBUTE ((__unused__))
#endif
#if !defined _Noreturn \
&& (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112)
# if defined _MSC_VER && 1200 <= _MSC_VER
# define _Noreturn __declspec (noreturn)
# else
# define _Noreturn YY_ATTRIBUTE ((__noreturn__))
# endif
#endif
/* Suppress unused-variable warnings by "using" E. */
#if ! defined lint || defined __GNUC__
# define YYUSE(E) ((void) (E))
#else
# define YYUSE(E) /* empty */
#endif
#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__
/* Suppress an incorrect diagnostic about yylval being uninitialized. */
# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \
_Pragma ("GCC diagnostic push") \
_Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\
_Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
# define YY_IGNORE_MAYBE_UNINITIALIZED_END \
_Pragma ("GCC diagnostic pop")
#else
# define YY_INITIAL_VALUE(Value) Value
#endif
#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
# define YY_IGNORE_MAYBE_UNINITIALIZED_END
#endif
#ifndef YY_INITIAL_VALUE
# define YY_INITIAL_VALUE(Value) /* Nothing. */
#endif
])
## ---------##
## Values. ##
## ---------##
# b4_null_define
# --------------
# Portability issues: define a YY_NULLPTR appropriate for the current
# language (C, C++98, or C++11).
m4_define([b4_null_define],
[# ifndef YY_NULLPTR
# if defined __cplusplus && 201103L <= __cplusplus
# define YY_NULLPTR nullptr
# else
# define YY_NULLPTR 0
# endif
# endif[]dnl
])
# b4_null
# -------
# Return a null pointer constant.
m4_define([b4_null], [YY_NULLPTR])
# b4_integral_parser_table_define(TABLE-NAME, CONTENT, COMMENT)
# -------------------------------------------------------------
# Define "yy" whose contents is CONTENT.
m4_define([b4_integral_parser_table_define],
[m4_ifvaln([$3], [b4_comment([$3], [ ])])dnl
static const b4_int_type_for([$2]) yy$1[[]] =
{
$2
};dnl
])
## ------------------------- ##
## Assigning token numbers. ##
## ------------------------- ##
# b4_token_define(TOKEN-NUM)
# --------------------------
# Output the definition of this token as #define.
m4_define([b4_token_define],
[b4_token_format([#define %s %s], [$1])])
# b4_token_defines
# ----------------
# Output the definition of the tokens.
m4_define([b4_token_defines],
[b4_any_token_visible_if([/* Tokens. */
m4_join([
], b4_symbol_map([b4_token_define]))
])])
# b4_token_enum(TOKEN-NUM)
# ------------------------
# Output the definition of this token as an enum.
m4_define([b4_token_enum],
[b4_token_format([%s = %s], [$1])])
# b4_token_enums
# --------------
# Output the definition of the tokens (if there are) as enums.
m4_define([b4_token_enums],
[b4_any_token_visible_if([[/* Token type. */
#ifndef ]b4_api_PREFIX[TOKENTYPE
# define ]b4_api_PREFIX[TOKENTYPE
enum ]b4_api_prefix[tokentype
{
]m4_join([,
],
b4_symbol_map([b4_token_enum]))[
};
#endif
]])])
# b4_token_enums_defines
# ----------------------
# Output the definition of the tokens (if there are any) as enums and,
# if POSIX Yacc is enabled, as #defines.
m4_define([b4_token_enums_defines],
[b4_token_enums[]b4_yacc_if([b4_token_defines])])
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
# b4_symbol_value(VAL, [TYPE])
# ----------------------------
# Given a semantic value VAL ($$, $1 etc.), extract its value of type
# TYPE if TYPE is given, otherwise just return VAL. The result can be
# used safetly, it is put in parens to avoid nasty precedence issues.
# TYPE is *not* put in braces, provide some if needed.
m4_define([b4_symbol_value],
[($1[]m4_ifval([$2], [.$2]))])
## ---------------------- ##
## Defining C functions. ##
## ---------------------- ##
# b4_function_define(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# -----------------------------------------------------------
# Declare the function NAME in C.
m4_define([b4_function_define],
[$2
$1 (b4_formals(m4_shift2($@)))[]dnl
])
# b4_formals([DECL1, NAME1], ...)
# -------------------------------
# The formal arguments of a C function definition.
m4_define([b4_formals],
[m4_if([$#], [0], [void],
[$#$1], [1], [void],
[m4_map_sep([b4_formal], [, ], [$@])])])
m4_define([b4_formal],
[$1])
## ----------------------- ##
## Declaring C functions. ##
## ----------------------- ##
# b4_function_declare(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# ------------------------------------------------------------
# Declare the function NAME.
m4_define([b4_function_declare],
[$2 $1 (b4_formals(m4_shift2($@)));[]dnl
])
## --------------------- ##
## Calling C functions. ##
## --------------------- ##
# b4_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# -----------------------------------------------------------
# Call the function NAME with arguments NAME1, NAME2 etc.
m4_define([b4_function_call],
[$1 (b4_args(m4_shift2($@)))[]dnl
])
# b4_args([DECL1, NAME1], ...)
# ----------------------------
# Output the arguments NAME1, NAME2...
m4_define([b4_args],
[m4_map_sep([b4_arg], [, ], [$@])])
m4_define([b4_arg],
[$2])
## ----------- ##
## Synclines. ##
## ----------- ##
# b4_sync_start(LINE, FILE)
# -------------------------
m4_define([b4_sync_start], [[#]line $1 $2])
## -------------- ##
## User actions. ##
## -------------- ##
# b4_case(LABEL, STATEMENTS)
# --------------------------
m4_define([b4_case],
[ case $1:
$2
b4_syncline([@oline@], [@ofile@])
break;])
# b4_predicate_case(LABEL, CONDITIONS)
# ------------------------------------
m4_define([b4_predicate_case],
[ case $1:
if (! ($2)) YYERROR;
b4_syncline([@oline@], [@ofile@])
break;])
# b4_yydestruct_define
# --------------------
# Define the "yydestruct" function.
m4_define_default([b4_yydestruct_define],
[[/*-----------------------------------------------.
| Release the memory associated to this symbol. |
`-----------------------------------------------*/
]b4_function_define([yydestruct],
[static void],
[[const char *yymsg], [yymsg]],
[[int yytype], [yytype]],
[[YYSTYPE *yyvaluep], [yyvaluep]][]dnl
b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
]b4_parse_param_use([yyvaluep], [yylocationp])dnl
[ if (!yymsg)
yymsg = "Deleting";
YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
]b4_symbol_actions([destructor])[
YY_IGNORE_MAYBE_UNINITIALIZED_END
}]dnl
])
# b4_yy_symbol_print_define
# -------------------------
# Define the "yy_symbol_print" function.
m4_define_default([b4_yy_symbol_print_define],
[[
/*----------------------------------------.
| Print this symbol's value on YYOUTPUT. |
`----------------------------------------*/
]b4_function_define([yy_symbol_value_print],
[static void],
[[FILE *yyoutput], [yyoutput]],
[[int yytype], [yytype]],
[[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
FILE *yyo = yyoutput;
]b4_parse_param_use([yyo], [yylocationp])dnl
[ if (!yyvaluep)
return;]
dnl glr.c does not feature yytoknum.
m4_if(b4_skeleton, ["yacc.c"],
[[# ifdef YYPRINT
if (yytype < YYNTOKENS)
YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
# endif
]])dnl
b4_symbol_actions([printer])[
}
/*--------------------------------.
| Print this symbol on YYOUTPUT. |
`--------------------------------*/
]b4_function_define([yy_symbol_print],
[static void],
[[FILE *yyoutput], [yyoutput]],
[[int yytype], [yytype]],
[[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
YYFPRINTF (yyoutput, "%s %s (",
yytype < YYNTOKENS ? "token" : "nterm", yytname[yytype]);
]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
YYFPRINTF (yyoutput, ": ");
])dnl
[ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
b4_locations_if([, yylocationp])[]b4_user_args[);
YYFPRINTF (yyoutput, ")");
}]dnl
])
## ---------------- ##
## api.value.type. ##
## ---------------- ##
# ---------------------- #
# api.value.type=union. #
# ---------------------- #
# b4_symbol_type_register(SYMBOL-NUM)
# -----------------------------------
# Symbol SYMBOL-NUM has a type (for variant) instead of a type-tag.
# Extend the definition of %union's body (b4_union_members) with a
# field of that type, and extend the symbol's "type" field to point to
# the field name, instead of the type name.
m4_define([b4_symbol_type_register],
[m4_define([b4_symbol($1, type_tag)],
[b4_symbol_if([$1], [has_id],
[b4_symbol([$1], [id])],
[yytype_[]b4_symbol([$1], [number])])])dnl
m4_append([b4_union_members],
m4_expand([
b4_symbol_tag_comment([$1])dnl
b4_symbol([$1], [type]) b4_symbol([$1], [type_tag]);]))
])
# b4_type_define_tag(SYMBOL1-NUM, ...)
# ------------------------------------
# For the batch of symbols SYMBOL1-NUM... (which all have the same
# type), enhance the %union definition for each of them, and set
# there "type" field to the field tag name, instead of the type name.
m4_define([b4_type_define_tag],
[b4_symbol_if([$1], [has_type],
[m4_map([b4_symbol_type_register], [$@])])
])
# b4_symbol_value_union(VAL, [TYPE])
# ----------------------------------
# Same of b4_symbol_value, but when api.value.type=union.
m4_define([b4_symbol_value_union],
[m4_ifval([$2],
[(*($2*)(&$1))],
[$1])])
])
# b4_value_type_setup_union
# -------------------------
# Setup support for api.value.type=union. Symbols are defined with a
# type instead of a union member name: build the corresponding union,
# and give the symbols their tag.
m4_define([b4_value_type_setup_union],
[m4_define([b4_union_members])
b4_type_foreach([b4_type_define_tag])
m4_copy_force([b4_symbol_value_union], [b4_symbol_value])
])
# -------------------------- #
# api.value.type = variant. #
# -------------------------- #
# b4_value_type_setup_variant
# ---------------------------
# Setup support for api.value.type=variant. By default, fail, specialized
# by other skeletons.
m4_define([b4_value_type_setup_variant],
[b4_complain_at(b4_percent_define_get_loc([[api.value.type]]),
[['%s' does not support '%s']],
[b4_skeleton],
[%define api.value.type variant])])
# _b4_value_type_setup_keyword
# ----------------------------
# api.value.type is defined with a keyword/string syntax. Check if
# that is properly defined, and prepare its use.
m4_define([_b4_value_type_setup_keyword],
[b4_percent_define_check_values([[[[api.value.type]],
[[none]],
[[union]],
[[union-directive]],
[[variant]],
[[yystype]]]])dnl
m4_case(b4_percent_define_get([[api.value.type]]),
[union], [b4_value_type_setup_union],
[variant], [b4_value_type_setup_variant])])
# b4_value_type_setup
# -------------------
# Check if api.value.type is properly defined, and possibly prepare
# its use.
b4_define_silent([b4_value_type_setup],
[# Define default value.
b4_percent_define_ifdef([[api.value.type]], [],
[# %union => api.value.type=union-directive
m4_ifdef([b4_union_members],
[m4_define([b4_percent_define_kind(api.value.type)], [keyword])
m4_define([b4_percent_define(api.value.type)], [union-directive])],
[# no tag seen => api.value.type={int}
m4_if(b4_tag_seen_flag, 0,
[m4_define([b4_percent_define_kind(api.value.type)], [code])
m4_define([b4_percent_define(api.value.type)], [int])],
[# otherwise api.value.type=yystype
m4_define([b4_percent_define_kind(api.value.type)], [keyword])
m4_define([b4_percent_define(api.value.type)], [yystype])])])])
# Set up.
m4_bmatch(b4_percent_define_get_kind([[api.value.type]]),
[keyword\|string], [_b4_value_type_setup_keyword])
])
## -------------- ##
## Declarations. ##
## -------------- ##
# b4_value_type_define
# --------------------
m4_define([b4_value_type_define],
[b4_value_type_setup[]dnl
/* Value type. */
m4_bmatch(b4_percent_define_get_kind([[api.value.type]]),
[code],
[[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
typedef ]b4_percent_define_get([[api.value.type]])[ ]b4_api_PREFIX[STYPE;
# define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1
# define ]b4_api_PREFIX[STYPE_IS_DECLARED 1
#endif
]],
[m4_bmatch(b4_percent_define_get([[api.value.type]]),
[union\|union-directive],
[[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED
]b4_percent_define_get_syncline([[api.value.union.name]])[
union ]b4_percent_define_get([[api.value.union.name]])[
{
]b4_user_union_members[
};
]b4_percent_define_get_syncline([[api.value.union.name]])[
typedef union ]b4_percent_define_get([[api.value.union.name]])[ ]b4_api_PREFIX[STYPE;
# define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1
# define ]b4_api_PREFIX[STYPE_IS_DECLARED 1
#endif
]])])])
# b4_location_type_define
# -----------------------
m4_define([b4_location_type_define],
[[/* Location type. */
#if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED
typedef struct ]b4_api_PREFIX[LTYPE ]b4_api_PREFIX[LTYPE;
struct ]b4_api_PREFIX[LTYPE
{
int first_line;
int first_column;
int last_line;
int last_column;
};
# define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1
# define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1
#endif
]])
# b4_declare_yylstype
# -------------------
# Declarations that might either go into the header (if --defines) or
# in the parser body. Declare YYSTYPE/YYLTYPE, and yylval/yylloc.
m4_define([b4_declare_yylstype],
[b4_value_type_define[]b4_locations_if([
b4_location_type_define])
b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval;
]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl
])
# b4_YYDEBUG_define
# -----------------
m4_define([b4_YYDEBUG_define],
[[/* Debug traces. */
]m4_if(b4_api_prefix, [yy],
[[#ifndef YYDEBUG
# define YYDEBUG ]b4_parse_trace_if([1], [0])[
#endif]],
[[#ifndef ]b4_api_PREFIX[DEBUG
# if defined YYDEBUG
#if YYDEBUG
# define ]b4_api_PREFIX[DEBUG 1
# else
# define ]b4_api_PREFIX[DEBUG 0
# endif
# else /* ! defined YYDEBUG */
# define ]b4_api_PREFIX[DEBUG ]b4_parse_trace_if([1], [0])[
# endif /* ! defined YYDEBUG */
#endif /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl
])
# b4_declare_yydebug
# ------------------
m4_define([b4_declare_yydebug],
[b4_YYDEBUG_define[
#if ]b4_api_PREFIX[DEBUG
extern int ]b4_prefix[debug;
#endif][]dnl
])
# b4_yylloc_default_define
# ------------------------
# Define YYLLOC_DEFAULT.
m4_define([b4_yylloc_default_define],
[[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
If N is 0, then set CURRENT to the empty location which ends
the previous symbol: RHS[0] (always defined). */
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
do \
if (N) \
{ \
(Current).first_line = YYRHSLOC (Rhs, 1).first_line; \
(Current).first_column = YYRHSLOC (Rhs, 1).first_column; \
(Current).last_line = YYRHSLOC (Rhs, N).last_line; \
(Current).last_column = YYRHSLOC (Rhs, N).last_column; \
} \
else \
{ \
(Current).first_line = (Current).last_line = \
YYRHSLOC (Rhs, 0).last_line; \
(Current).first_column = (Current).last_column = \
YYRHSLOC (Rhs, 0).last_column; \
} \
while (0)
#endif
]])
# b4_yy_location_print_define
# ---------------------------
# Define YY_LOCATION_PRINT.
m4_define([b4_yy_location_print_define],
[b4_locations_if([[
/* YY_LOCATION_PRINT -- Print the location on the stream.
This macro was not mandated originally: define only if we know
we won't break user code: when these are the locations we know. */
#ifndef YY_LOCATION_PRINT
# if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
/* Print *YYLOCP on YYO. Private, do not rely on its existence. */
YY_ATTRIBUTE_UNUSED
]b4_function_define([yy_location_print_],
[static unsigned],
[[FILE *yyo], [yyo]],
[[YYLTYPE const * const yylocp], [yylocp]])[
{
unsigned res = 0;
int end_col = 0 != yylocp->last_column ? yylocp->last_column - 1 : 0;
if (0 <= yylocp->first_line)
{
res += YYFPRINTF (yyo, "%d", yylocp->first_line);
if (0 <= yylocp->first_column)
res += YYFPRINTF (yyo, ".%d", yylocp->first_column);
}
if (0 <= yylocp->last_line)
{
if (yylocp->first_line < yylocp->last_line)
{
res += YYFPRINTF (yyo, "-%d", yylocp->last_line);
if (0 <= end_col)
res += YYFPRINTF (yyo, ".%d", end_col);
}
else if (0 <= end_col && yylocp->first_column < end_col)
res += YYFPRINTF (yyo, "-%d", end_col);
}
return res;
}
# define YY_LOCATION_PRINT(File, Loc) \
yy_location_print_ (File, &(Loc))
# else
# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
# endif
#endif]],
[[/* This macro is provided for backward compatibility. */
#ifndef YY_LOCATION_PRINT
# define YY_LOCATION_PRINT(File, Loc) ((void) 0)
#endif]])
])
# b4_yyloc_default
# ----------------
# Expand to a possible default value for yylloc.
m4_define([b4_yyloc_default],
[[
# if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL
= { ]m4_join([, ],
m4_defn([b4_location_initial_line]),
m4_defn([b4_location_initial_column]),
m4_defn([b4_location_initial_line]),
m4_defn([b4_location_initial_column]))[ }
# endif
]])
PK lCiZh READMEnu [ -*- outline -*-
This directory contains data needed by Bison.
* Skeletons
Bison skeletons: the general shapes of the different parser kinds,
that are specialized for specific grammars by the bison program.
Currently, the supported skeletons are:
- yacc.c
It used to be named bison.simple: it corresponds to C Yacc
compatible LALR(1) parsers.
- lalr1.cc
Produces a C++ parser class.
- lalr1.java
Produces a Java parser class.
- glr.c
A Generalized LR C parser based on Bison's LALR(1) tables.
- glr.cc
A Generalized LR C++ parser. Actually a C++ wrapper around glr.c.
These skeletons are the only ones supported by the Bison team.
Because the interface between skeletons and the bison program is not
finished, *we are not bound to it*. In particular, Bison is not
mature enough for us to consider that "foreign skeletons" are
supported.
* m4sugar
This directory contains M4sugar, sort of an extended library for M4,
which is used by Bison to instantiate the skeletons.
* xslt
This directory contains XSLT programs that transform Bison's XML output
into various formats.
- bison.xsl
A library of routines used by the other XSLT programs.
- xml2dot.xsl
Conversion into GraphViz's dot format.
- xml2text.xsl
Conversion into text.
- xml2xhtml.xsl
Conversion into XHTML.
-----
Copyright (C) 2002, 2008-2015 Free Software Foundation, Inc.
This file is part of GNU Bison.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
PK lCiZY & & java.m4nu [ -*- Autoconf -*-
# Java language support for Bison
# Copyright (C) 2007-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_include(b4_pkgdatadir/[c-like.m4])
# b4_list2(LIST1, LIST2)
# ----------------------
# Join two lists with a comma if necessary.
m4_define([b4_list2],
[$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
# b4_percent_define_get3(DEF, PRE, POST, NOT)
# -------------------------------------------
# Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
# otherwise NOT.
m4_define([b4_percent_define_get3],
[m4_ifval(m4_quote(b4_percent_define_get([$1])),
[$2[]b4_percent_define_get([$1])[]$3], [$4])])
# b4_flag_value(BOOLEAN-FLAG)
# ---------------------------
m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
# b4_public_if(TRUE, FALSE)
# -------------------------
b4_percent_define_default([[public]], [[false]])
m4_define([b4_public_if],
[b4_percent_define_flag_if([public], [$1], [$2])])
# b4_abstract_if(TRUE, FALSE)
# ---------------------------
b4_percent_define_default([[abstract]], [[false]])
m4_define([b4_abstract_if],
[b4_percent_define_flag_if([abstract], [$1], [$2])])
# b4_final_if(TRUE, FALSE)
# ---------------------------
b4_percent_define_default([[final]], [[false]])
m4_define([b4_final_if],
[b4_percent_define_flag_if([final], [$1], [$2])])
# b4_strictfp_if(TRUE, FALSE)
# ---------------------------
b4_percent_define_default([[strictfp]], [[false]])
m4_define([b4_strictfp_if],
[b4_percent_define_flag_if([strictfp], [$1], [$2])])
# b4_lexer_if(TRUE, FALSE)
# ------------------------
m4_define([b4_lexer_if],
[b4_percent_code_ifdef([[lexer]], [$1], [$2])])
# b4_identification
# -----------------
m4_define([b4_identification],
[ /** Version number for the Bison executable that generated this parser. */
public static final String bisonVersion = "b4_version";
/** Name of the skeleton that generated this parser. */
public static final String bisonSkeleton = b4_skeleton;
])
## ------------ ##
## Data types. ##
## ------------ ##
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# MIN to MAX (included).
m4_define([b4_int_type],
[m4_if(b4_ints_in($@, [-128], [127]), [1], [byte],
b4_ints_in($@, [-32768], [32767]), [1], [short],
[int])])
# b4_int_type_for(NAME)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# 'NAME_min' to 'NAME_max' (included).
m4_define([b4_int_type_for],
[b4_int_type($1_min, $1_max)])
# b4_null
# -------
m4_define([b4_null], [null])
# b4_typed_parser_table_define(TYPE, NAME, DATA, COMMENT)
# -------------------------------------------------------
m4_define([b4_typed_parser_table_define],
[m4_ifval([$4], [b4_comment([$4])
])dnl
[private static final ]$1[ yy$2_[] = yy$2_init();
private static final ]$1[[] yy$2_init()
{
return new ]$1[[]
{
]$3[
};
}]])
# b4_integral_parser_table_define(NAME, DATA, COMMENT)
#-----------------------------------------------------
m4_define([b4_integral_parser_table_define],
[b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])])
## ------------------------- ##
## Assigning token numbers. ##
## ------------------------- ##
# b4_token_enum(TOKEN-NUM)
# ------------------------
# Output the definition of this token as an enum.
m4_define([b4_token_enum],
[b4_token_format([ /** Token number, to be returned by the scanner. */
static final int %s = %s;
], [$1])])
# b4_token_enums
# --------------
# Output the definition of the tokens (if there are) as enums.
m4_define([b4_token_enums],
[b4_any_token_visible_if([/* Tokens. */
b4_symbol_foreach([b4_token_enum])])])
# b4-case(ID, CODE)
# -----------------
# We need to fool Java's stupid unreachable code detection.
m4_define([b4_case], [ case $1:
if (yyn == $1)
$2;
break;
])
# b4_predicate_case(LABEL, CONDITIONS)
# ------------------------------------
m4_define([b4_predicate_case], [ case $1:
if (! ($2)) YYERROR;
break;
])
## -------- ##
## Checks. ##
## -------- ##
b4_percent_define_check_kind([[api.value.type]], [code], [deprecated])
b4_percent_define_check_kind([[annotations]], [code], [deprecated])
b4_percent_define_check_kind([[extends]], [code], [deprecated])
b4_percent_define_check_kind([[implements]], [code], [deprecated])
b4_percent_define_check_kind([[init_throws]], [code], [deprecated])
b4_percent_define_check_kind([[lex_throws]], [code], [deprecated])
b4_percent_define_check_kind([[parser_class_name]], [code], [deprecated])
b4_percent_define_check_kind([[throws]], [code], [deprecated])
## ---------------- ##
## Default values. ##
## ---------------- ##
m4_define([b4_yystype], [b4_percent_define_get([[api.value.type]])])
b4_percent_define_default([[api.value.type]], [[Object]])
# %name-prefix
m4_define_default([b4_prefix], [[YY]])
b4_percent_define_default([[parser_class_name]], [b4_prefix[]Parser])
m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])])
b4_percent_define_default([[lex_throws]], [[java.io.IOException]])
m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])])
b4_percent_define_default([[throws]], [])
m4_define([b4_throws], [b4_percent_define_get([[throws]])])
b4_percent_define_default([[init_throws]], [])
m4_define([b4_init_throws], [b4_percent_define_get([[init_throws]])])
b4_percent_define_default([[api.location.type]], [Location])
m4_define([b4_location_type], [b4_percent_define_get([[api.location.type]])])
b4_percent_define_default([[api.position.type]], [Position])
m4_define([b4_position_type], [b4_percent_define_get([[api.position.type]])])
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $$.
m4_define([b4_lhs_value], [yyval])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
#
# In this simple implementation, %token and %type have class names
# between the angle brackets.
m4_define([b4_rhs_value],
[(m4_ifval($3, [($3)])[](yystack.valueAt ($1-($2))))])
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[(yyloc)])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[yystack.locationAt ($1-($2))])
# b4_lex_param
# b4_parse_param
# --------------
# If defined, b4_lex_param arrives double quoted, but below we prefer
# it to be single quoted. Same for b4_parse_param.
# TODO: should be in bison.m4
m4_define_default([b4_lex_param], [[]])
m4_define([b4_lex_param], b4_lex_param)
m4_define([b4_parse_param], b4_parse_param)
# b4_lex_param_decl
# -----------------
# Extra formal arguments of the constructor.
m4_define([b4_lex_param_decl],
[m4_ifset([b4_lex_param],
[b4_remove_comma([$1],
b4_param_decls(b4_lex_param))],
[$1])])
m4_define([b4_param_decls],
[m4_map([b4_param_decl], [$@])])
m4_define([b4_param_decl], [, $1])
m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
# b4_parse_param_decl
# -------------------
# Extra formal arguments of the constructor.
m4_define([b4_parse_param_decl],
[m4_ifset([b4_parse_param],
[b4_remove_comma([$1],
b4_param_decls(b4_parse_param))],
[$1])])
# b4_lex_param_call
# -----------------
# Delegating the lexer parameters to the lexer constructor.
m4_define([b4_lex_param_call],
[m4_ifset([b4_lex_param],
[b4_remove_comma([$1],
b4_param_calls(b4_lex_param))],
[$1])])
m4_define([b4_param_calls],
[m4_map([b4_param_call], [$@])])
m4_define([b4_param_call], [, $2])
# b4_parse_param_cons
# -------------------
# Extra initialisations of the constructor.
m4_define([b4_parse_param_cons],
[m4_ifset([b4_parse_param],
[b4_constructor_calls(b4_parse_param)])])
m4_define([b4_constructor_calls],
[m4_map([b4_constructor_call], [$@])])
m4_define([b4_constructor_call],
[this.$2 = $2;
])
# b4_parse_param_vars
# -------------------
# Extra instance variables.
m4_define([b4_parse_param_vars],
[m4_ifset([b4_parse_param],
[
/* User arguments. */
b4_var_decls(b4_parse_param)])])
m4_define([b4_var_decls],
[m4_map_sep([b4_var_decl], [
], [$@])])
m4_define([b4_var_decl],
[ protected final $1;])
# b4_maybe_throws(THROWS)
# -----------------------
# Expand to either an empty string or "throws THROWS".
m4_define([b4_maybe_throws],
[m4_ifval($1, [throws $1])])
PK lCiZ(Od" d" location.ccnu [ # C++ skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_pushdef([b4_copyright_years],
[2002-2015])
# b4_position_define
# ------------------
# Define class position.
m4_define([b4_position_define],
[[ /// Abstract a position.
class position
{
public:]m4_ifdef([b4_location_constructors], [[
/// Construct a position.
explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
: filename (f)
, line (l)
, column (c)
{
}
]])[
/// Initialization.
void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULLPTR,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
{
filename = fn;
line = l;
column = c;
}
/** \name Line and Column related manipulators
** \{ */
/// (line related) Advance to the COUNT next lines.
void lines (int count = 1)
{
if (count)
{
column = ]b4_location_initial_column[u;
line = add_ (line, count, ]b4_location_initial_line[);
}
}
/// (column related) Advance to the COUNT next columns.
void columns (int count = 1)
{
column = add_ (column, count, ]b4_location_initial_column[);
}
/** \} */
/// File name to which this position refers.
]b4_percent_define_get([[filename_type]])[* filename;
/// Current line number.
unsigned int line;
/// Current column number.
unsigned int column;
private:
/// Compute max(min, lhs+rhs) (provided min <= lhs).
static unsigned int add_ (unsigned int lhs, int rhs, unsigned int min)
{
return (0 < rhs || -static_cast(rhs) < lhs
? rhs + lhs
: min);
}
};
/// Add \a width columns, in place.
inline position&
operator+= (position& res, int width)
{
res.columns (width);
return res;
}
/// Add \a width columns.
inline position
operator+ (position res, int width)
{
return res += width;
}
/// Subtract \a width columns, in place.
inline position&
operator-= (position& res, int width)
{
return res += -width;
}
/// Subtract \a width columns.
inline position
operator- (position res, int width)
{
return res -= width;
}
]b4_percent_define_flag_if([[define_location_comparison]], [[
/// Compare two position objects.
inline bool
operator== (const position& pos1, const position& pos2)
{
return (pos1.line == pos2.line
&& pos1.column == pos2.column
&& (pos1.filename == pos2.filename
|| (pos1.filename && pos2.filename
&& *pos1.filename == *pos2.filename)));
}
/// Compare two position objects.
inline bool
operator!= (const position& pos1, const position& pos2)
{
return !(pos1 == pos2);
}
]])[
/** \brief Intercept output stream redirection.
** \param ostr the destination output stream
** \param pos a reference to the position to redirect
*/
template
inline std::basic_ostream&
operator<< (std::basic_ostream& ostr, const position& pos)
{
if (pos.filename)
ostr << *pos.filename << ':';
return ostr << pos.line << '.' << pos.column;
}
]])
# b4_location_define
# ------------------
m4_define([b4_location_define],
[[ /// Abstract a location.
class location
{
public:
]m4_ifdef([b4_location_constructors], [
/// Construct a location from \a b to \a e.
location (const position& b, const position& e)
: begin (b)
, end (e)
{
}
/// Construct a 0-width location in \a p.
explicit location (const position& p = position ())
: begin (p)
, end (p)
{
}
/// Construct a 0-width location in \a f, \a l, \a c.
explicit location (]b4_percent_define_get([[filename_type]])[* f,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
: begin (f, l, c)
, end (f, l, c)
{
}
])[
/// Initialization.
void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULLPTR,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
{
begin.initialize (f, l, c);
end = begin;
}
/** \name Line and Column related manipulators
** \{ */
public:
/// Reset initial location to final location.
void step ()
{
begin = end;
}
/// Extend the current location to the COUNT next columns.
void columns (int count = 1)
{
end += count;
}
/// Extend the current location to the COUNT next lines.
void lines (int count = 1)
{
end.lines (count);
}
/** \} */
public:
/// Beginning of the located region.
position begin;
/// End of the located region.
position end;
};
/// Join two locations, in place.
inline location& operator+= (location& res, const location& end)
{
res.end = end.end;
return res;
}
/// Join two locations.
inline location operator+ (location res, const location& end)
{
return res += end;
}
/// Add \a width columns to the end position, in place.
inline location& operator+= (location& res, int width)
{
res.columns (width);
return res;
}
/// Add \a width columns to the end position.
inline location operator+ (location res, int width)
{
return res += width;
}
/// Subtract \a width columns to the end position, in place.
inline location& operator-= (location& res, int width)
{
return res += -width;
}
/// Subtract \a width columns to the end position.
inline location operator- (location res, int width)
{
return res -= width;
}
]b4_percent_define_flag_if([[define_location_comparison]], [[
/// Compare two location objects.
inline bool
operator== (const location& loc1, const location& loc2)
{
return loc1.begin == loc2.begin && loc1.end == loc2.end;
}
/// Compare two location objects.
inline bool
operator!= (const location& loc1, const location& loc2)
{
return !(loc1 == loc2);
}
]])[
/** \brief Intercept output stream redirection.
** \param ostr the destination output stream
** \param loc a reference to the location to redirect
**
** Avoid duplicate information.
*/
template
inline std::basic_ostream&
operator<< (std::basic_ostream& ostr, const location& loc)
{
unsigned int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;
ostr << loc.begin;
if (loc.end.filename
&& (!loc.begin.filename
|| *loc.begin.filename != *loc.end.filename))
ostr << '-' << loc.end.filename << ':' << loc.end.line << '.' << end_col;
else if (loc.begin.line < loc.end.line)
ostr << '-' << loc.end.line << '.' << end_col;
else if (loc.begin.column < end_col)
ostr << '-' << end_col;
return ostr;
}
]])
b4_defines_if([
b4_output_begin([b4_dir_prefix[]position.hh])
b4_copyright([Positions for Bison parsers in C++])[
/**
** \file ]b4_dir_prefix[position.hh
** Define the ]b4_namespace_ref[::position class.
*/
]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[
# include // std::max
# include
# include
]b4_null_define[
]b4_namespace_open[
]b4_position_define[
]b4_namespace_close[
]b4_cpp_guard_close([b4_dir_prefix[]position.hh])
b4_output_end()
b4_output_begin([b4_dir_prefix[]location.hh])
b4_copyright([Locations for Bison parsers in C++])[
/**
** \file ]b4_dir_prefix[location.hh
** Define the ]b4_namespace_ref[::location class.
*/
]b4_cpp_guard_open([b4_dir_prefix[]location.hh])[
# include "position.hh"
]b4_namespace_open[
]b4_location_define[
]b4_namespace_close[
]b4_cpp_guard_close([b4_dir_prefix[]location.hh])
b4_output_end()
])
m4_popdef([b4_copyright_years])
PK lCiZڝg g yacc.cnu [ -*- C -*-
# Yacc compatible skeleton for Bison
# Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation,
# Inc.
m4_pushdef([b4_copyright_years],
[1984, 1989-1990, 2000-2015])
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
# Check the value of %define api.push-pull.
b4_percent_define_default([[api.push-pull]], [[pull]])
b4_percent_define_check_values([[[[api.push-pull]],
[[pull]], [[push]], [[both]]]])
b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]])
b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]])
m4_case(b4_percent_define_get([[api.push-pull]]),
[pull], [m4_define([b4_push_flag], [[0]])],
[push], [m4_define([b4_pull_flag], [[0]])])
# Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing
# tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the
# behavior of Bison at all when push parsing is already requested.
b4_define_flag_if([use_push_for_pull])
b4_use_push_for_pull_if([
b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])],
[m4_define([b4_push_flag], [[1]])])])
# Check the value of %define parse.lac and friends, where LAC stands for
# lookahead correction.
b4_percent_define_default([[parse.lac]], [[none]])
b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]])
b4_percent_define_default([[parse.lac.memory-trace]], [[failures]])
b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]],
[[[[parse.lac.memory-trace]],
[[failures]], [[full]]]])
b4_define_flag_if([lac])
m4_define([b4_lac_flag],
[m4_if(b4_percent_define_get([[parse.lac]]),
[none], [[0]], [[1]])])
m4_include(b4_pkgdatadir/[c.m4])
## ---------------- ##
## Default values. ##
## ---------------- ##
# Stack parameters.
m4_define_default([b4_stack_depth_max], [10000])
m4_define_default([b4_stack_depth_init], [200])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
b4_percent_define_default([[api.pure]], [[false]])
b4_percent_define_check_values([[[[api.pure]],
[[false]], [[true]], [[]], [[full]]]])
m4_define([b4_pure_flag], [[0]])
m4_case(b4_percent_define_get([[api.pure]]),
[false], [m4_define([b4_pure_flag], [[0]])],
[true], [m4_define([b4_pure_flag], [[1]])],
[], [m4_define([b4_pure_flag], [[1]])],
[full], [m4_define([b4_pure_flag], [[2]])])
m4_define([b4_pure_if],
[m4_case(b4_pure_flag,
[0], [$2],
[1], [$1],
[2], [$1])])
[m4_fatal([invalid api.pure value: ]$1)])])
# b4_yyerror_arg_loc_if(ARG)
# --------------------------
# Expand ARG iff yyerror is to be given a location as argument.
m4_define([b4_yyerror_arg_loc_if],
[b4_locations_if([m4_case(b4_pure_flag,
[1], [m4_ifset([b4_parse_param], [$1])],
[2], [$1])])])
# b4_yyerror_args
# ---------------
# Arguments passed to yyerror: user args plus yylloc.
m4_define([b4_yyerror_args],
[b4_yyerror_arg_loc_if([&yylloc, ])dnl
m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
## ------------ ##
## Data Types. ##
## ------------ ##
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# MIN to MAX (included). Overwrite the version from c.m4, which
# uses only C89 types, so that the user can override the shorter
# types, and so that pre-C89 compilers are handled correctly.
m4_define([b4_int_type],
[m4_if(b4_ints_in($@, [0], [255]), [1], [yytype_uint8],
b4_ints_in($@, [-128], [127]), [1], [yytype_int8],
b4_ints_in($@, [0], [65535]), [1], [yytype_uint16],
b4_ints_in($@, [-32768], [32767]), [1], [yytype_int16],
m4_eval([0 <= $1]), [1], [unsigned int],
[int])])
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $$.
m4_define([b4_lhs_value],
[b4_symbol_value(yyval, [$1])])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])])
## ----------- ##
## Locations. ##
## ----------- ##
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[(yyloc)])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[(yylsp@{b4_subtract([$2], [$1])@})])
## -------------- ##
## Declarations. ##
## -------------- ##
# b4_declare_scanner_communication_variables
# ------------------------------------------
# Declare the variables that are global, or local to YYPARSE if
# pure-parser.
m4_define([b4_declare_scanner_communication_variables], [[
/* The lookahead symbol. */
int yychar;
]b4_pure_if([[
/* The semantic value of the lookahead symbol. */
/* Default value used for initialization, for pacifying older GCCs
or non-GCC compilers. */
YY_INITIAL_VALUE (static YYSTYPE yyval_default;)
YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);]b4_locations_if([[
/* Location data for the lookahead symbol. */
static YYLTYPE yyloc_default]b4_yyloc_default[;
YYLTYPE yylloc = yyloc_default;]])],
[[/* The semantic value of the lookahead symbol. */
YYSTYPE yylval;]b4_locations_if([[
/* Location data for the lookahead symbol. */
YYLTYPE yylloc]b4_yyloc_default[;]])[
/* Number of syntax errors so far. */
int yynerrs;]])])
# b4_declare_parser_state_variables
# ---------------------------------
# Declare all the variables that are needed to maintain the parser state
# between calls to yypush_parse.
m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
/* Number of syntax errors so far. */
int yynerrs;
]])[
int yystate;
/* Number of tokens to shift before error messages enabled. */
int yyerrstatus;
/* The stacks and their tools:
'yyss': related to states.
'yyvs': related to semantic values.]b4_locations_if([[
'yyls': related to locations.]])[
Refer to the stacks through separate pointers, to allow yyoverflow
to reallocate them elsewhere. */
/* The state stack. */
yytype_int16 yyssa[YYINITDEPTH];
yytype_int16 *yyss;
yytype_int16 *yyssp;
/* The semantic value stack. */
YYSTYPE yyvsa[YYINITDEPTH];
YYSTYPE *yyvs;
YYSTYPE *yyvsp;]b4_locations_if([[
/* The location stack. */
YYLTYPE yylsa[YYINITDEPTH];
YYLTYPE *yyls;
YYLTYPE *yylsp;
/* The locations where the error started and ended. */
YYLTYPE yyerror_range[3];]])[
YYSIZE_T yystacksize;]b4_lac_if([[
yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@};
yytype_int16 *yyes;
YYSIZE_T yyes_capacity;]])])
# b4_declare_yyparse_push_
# ------------------------
# Declaration of yyparse (and dependencies) when using the push parser
# (including in pull mode).
m4_define([b4_declare_yyparse_push_],
[[#ifndef YYPUSH_MORE_DEFINED
# define YYPUSH_MORE_DEFINED
enum { YYPUSH_MORE = 4 };
#endif
typedef struct ]b4_prefix[pstate ]b4_prefix[pstate;
]b4_pull_if([b4_function_declare([b4_prefix[parse]], [[int]], b4_parse_param)
])b4_function_declare([b4_prefix[push_parse]], [[int]],
[[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([,
[[[int pushed_char]], [[pushed_char]]],
[[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([,
[[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [,
b4_parse_param]))
b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]],
[[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [,
b4_parse_param]))])
b4_function_declare([b4_prefix[pstate_new]], [b4_prefix[pstate *]],
[[[void]], []])
b4_function_declare([b4_prefix[pstate_delete]], [[void]],
[[b4_prefix[pstate *ps]], [[ps]]])dnl
])
# b4_declare_yyparse_
# -------------------
# When not the push parser.
m4_define([b4_declare_yyparse_],
[b4_function_declare(b4_prefix[parse], [int], b4_parse_param)])
# b4_declare_yyparse
# ------------------
m4_define([b4_declare_yyparse],
[b4_push_if([b4_declare_yyparse_push_],
[b4_declare_yyparse_])[]dnl
])
# b4_shared_declarations
# ----------------------
# Declaration that might either go into the header (if --defines)
# or open coded in the parser body.
m4_define([b4_shared_declarations],
[b4_cpp_guard_open([b4_spec_defines_file])[
]b4_declare_yydebug[
]b4_percent_code_get([[requires]])[
]b4_token_enums_defines[
]b4_declare_yylstype[
]b4_declare_yyparse[
]b4_percent_code_get([[provides]])[
]b4_cpp_guard_close([b4_spec_defines_file])[]dnl
])
## -------------- ##
## Output files. ##
## -------------- ##
b4_output_begin([b4_parser_file_name])
b4_copyright([Bison implementation for Yacc-like parsers in C])[
/* C LALR(1) parser skeleton written by Richard Stallman, by
simplifying the original so-called "semantic" parser. */
/* All symbols defined below should begin with yy or YY, to avoid
infringing on user name space. This should be done even for local
variables, as they might otherwise be expanded by user macros.
There are some unavoidable exceptions within include files to
define necessary library symbols; they are noted "INFRINGES ON
USER NAME SPACE" below. */
]b4_identification
b4_percent_code_get([[top]])[]dnl
m4_if(b4_api_prefix, [yy], [],
[[/* Substitute the type names. */
#define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
#define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
]m4_if(b4_prefix, [yy], [],
[[/* Substitute the variable and function names. */]b4_pull_if([[
#define yyparse ]b4_prefix[parse]])b4_push_if([[
#define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[
#define yypull_parse ]b4_prefix[pull_parse]])[
#define yypstate_new ]b4_prefix[pstate_new
#define yypstate_delete ]b4_prefix[pstate_delete
#define yypstate ]b4_prefix[pstate]])[
#define yylex ]b4_prefix[lex
#define yyerror ]b4_prefix[error
#define yydebug ]b4_prefix[debug
#define yynerrs ]b4_prefix[nerrs
]]b4_pure_if([], [[
#define yylval ]b4_prefix[lval
#define yychar ]b4_prefix[char]b4_locations_if([[
#define yylloc ]b4_prefix[lloc]])]))[
/* Copy the first part of user declarations. */
]b4_user_pre_prologue[
]b4_null_define[
/* Enabling verbose error messages. */
#ifdef YYERROR_VERBOSE
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
]m4_ifval(m4_quote(b4_spec_defines_file),
[[/* In a future release of Bison, this section will be replaced
by #include "@basename(]b4_spec_defines_file[@)". */
]])dnl
b4_shared_declarations[
/* Copy the second part of user declarations. */
]b4_user_post_prologue
b4_percent_code_get[]dnl
[#ifdef short
# undef short
#endif
#ifdef YYTYPE_UINT8
typedef YYTYPE_UINT8 yytype_uint8;
#else
typedef unsigned char yytype_uint8;
#endif
#ifdef YYTYPE_INT8
typedef YYTYPE_INT8 yytype_int8;
#else
typedef signed char yytype_int8;
#endif
#ifdef YYTYPE_UINT16
typedef YYTYPE_UINT16 yytype_uint16;
#else
typedef unsigned short int yytype_uint16;
#endif
#ifdef YYTYPE_INT16
typedef YYTYPE_INT16 yytype_int16;
#else
typedef short int yytype_int16;
#endif
#ifndef YYSIZE_T
# ifdef __SIZE_TYPE__
# define YYSIZE_T __SIZE_TYPE__
# elif defined size_t
# define YYSIZE_T size_t
# elif ! defined YYSIZE_T
# include /* INFRINGES ON USER NAME SPACE */
# define YYSIZE_T size_t
# else
# define YYSIZE_T unsigned int
# endif
#endif
#define YYSIZE_MAXIMUM ((YYSIZE_T) -1)
#ifndef YY_
# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include /* INFRINGES ON USER NAME SPACE */
# define YY_(Msgid) dgettext ("bison-runtime", Msgid)
# endif
# endif
# ifndef YY_
# define YY_(Msgid) Msgid
# endif
#endif
]b4_attribute_define[
#if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[
/* The parser invokes alloca or malloc; define the necessary symbols. */]dnl
b4_push_if([], [b4_lac_if([], [[
# ifdef YYSTACK_USE_ALLOCA
# if YYSTACK_USE_ALLOCA
# ifdef __GNUC__
# define YYSTACK_ALLOC __builtin_alloca
# elif defined __BUILTIN_VA_ARG_INCR
# include /* INFRINGES ON USER NAME SPACE */
# elif defined _AIX
# define YYSTACK_ALLOC __alloca
# elif defined _MSC_VER
# include /* INFRINGES ON USER NAME SPACE */
# define alloca _alloca
# else
# define YYSTACK_ALLOC alloca
# if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
# include /* INFRINGES ON USER NAME SPACE */
/* Use EXIT_SUCCESS as a witness for stdlib.h. */
# ifndef EXIT_SUCCESS
# define EXIT_SUCCESS 0
# endif
# endif
# endif
# endif
# endif]])])[
# ifdef YYSTACK_ALLOC
/* Pacify GCC's 'empty if-body' warning. */
# define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
# ifndef YYSTACK_ALLOC_MAXIMUM
/* The OS might guarantee only one guard page at the bottom of the stack,
and a page size can be as small as 4096 bytes. So we cannot safely
invoke alloca (N) if N exceeds 4096. Use a slightly smaller number
to allow for a few compiler-allocated temporary stack slots. */
# define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
# endif
# else
# define YYSTACK_ALLOC YYMALLOC
# define YYSTACK_FREE YYFREE
# ifndef YYSTACK_ALLOC_MAXIMUM
# define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
# endif
# if (defined __cplusplus && ! defined EXIT_SUCCESS \
&& ! ((defined YYMALLOC || defined malloc) \
&& (defined YYFREE || defined free)))
# include /* INFRINGES ON USER NAME SPACE */
# ifndef EXIT_SUCCESS
# define EXIT_SUCCESS 0
# endif
# endif
# ifndef YYMALLOC
# define YYMALLOC malloc
# if ! defined malloc && ! defined EXIT_SUCCESS
void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
# endif
# endif
# ifndef YYFREE
# define YYFREE free
# if ! defined free && ! defined EXIT_SUCCESS
void free (void *); /* INFRINGES ON USER NAME SPACE */
# endif
# endif
# endif]b4_lac_if([[
# define YYCOPY_NEEDED 1]])[
#endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[
#if (! defined yyoverflow \
&& (! defined __cplusplus \
|| (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \
&& ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL)))
/* A type that is properly aligned for any stack member. */
union yyalloc
{
yytype_int16 yyss_alloc;
YYSTYPE yyvs_alloc;]b4_locations_if([
YYLTYPE yyls_alloc;])[
};
/* The size of the maximum gap between one aligned stack and the next. */
# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
/* The size of an array large to enough to hold all stacks, each with
N elements. */
]b4_locations_if(
[# define YYSTACK_BYTES(N) \
((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE) + sizeof (YYLTYPE)) \
+ 2 * YYSTACK_GAP_MAXIMUM)],
[# define YYSTACK_BYTES(N) \
((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \
+ YYSTACK_GAP_MAXIMUM)])[
# define YYCOPY_NEEDED 1
/* Relocate STACK from its old location to the new one. The
local variables YYSIZE and YYSTACKSIZE give the old and new number of
elements in the stack, and YYPTR gives the new location of the
stack. Advance YYPTR to a properly aligned location for the next
stack. */
# define YYSTACK_RELOCATE(Stack_alloc, Stack) \
do \
{ \
YYSIZE_T yynewbytes; \
YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \
Stack = &yyptr->Stack_alloc; \
yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
yyptr += yynewbytes / sizeof (*yyptr); \
} \
while (0)
#endif
#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
/* Copy COUNT objects from SRC to DST. The source and destination do
not overlap. */
# ifndef YYCOPY
# if defined __GNUC__ && 1 < __GNUC__
# define YYCOPY(Dst, Src, Count) \
__builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
# else
# define YYCOPY(Dst, Src, Count) \
do \
{ \
YYSIZE_T yyi; \
for (yyi = 0; yyi < (Count); yyi++) \
(Dst)[yyi] = (Src)[yyi]; \
} \
while (0)
# endif
# endif
#endif /* !YYCOPY_NEEDED */
/* YYFINAL -- State number of the termination state. */
#define YYFINAL ]b4_final_state_number[
/* YYLAST -- Last index in YYTABLE. */
#define YYLAST ]b4_last[
/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS ]b4_tokens_number[
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS ]b4_nterms_number[
/* YYNRULES -- Number of rules. */
#define YYNRULES ]b4_rules_number[
/* YYNSTATES -- Number of states. */
#define YYNSTATES ]b4_states_number[
/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned
by yylex, with out-of-bounds checking. */
#define YYUNDEFTOK ]b4_undef_token_number[
#define YYMAXUTOK ]b4_user_token_number_max[
#define YYTRANSLATE(YYX) \
((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
as returned by yylex, without out-of-bounds checking. */
static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
{
]b4_translate[
};
#if ]b4_api_PREFIX[DEBUG
]b4_integral_parser_table_define([rline], [b4_rline],
[[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[
#endif
#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
First, the terminals, then, starting at YYNTOKENS, nonterminals. */
static const char *const yytname[] =
{
]b4_tname[
};
#endif
# ifdef YYPRINT
/* YYTOKNUM[NUM] -- (External) token number corresponding to the
(internal) symbol number NUM (which must be that of a token). */
static const ]b4_int_type_for([b4_toknum])[ yytoknum[] =
{
]b4_toknum[
};
# endif
#define YYPACT_NINF ]b4_pact_ninf[
#define yypact_value_is_default(Yystate) \
]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[
#define YYTABLE_NINF ]b4_table_ninf[
#define yytable_value_is_error(Yytable_value) \
]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[
]b4_parser_tables_define[
#define yyerrok (yyerrstatus = 0)
#define yyclearin (yychar = YYEMPTY)
#define YYEMPTY (-2)
#define YYEOF 0
#define YYACCEPT goto yyacceptlab
#define YYABORT goto yyabortlab
#define YYERROR goto yyerrorlab
#define YYRECOVERING() (!!yyerrstatus)
#define YYBACKUP(Token, Value) \
do \
if (yychar == YYEMPTY) \
{ \
yychar = (Token); \
yylval = (Value); \
YYPOPSTACK (yylen); \
yystate = *yyssp; \]b4_lac_if([[
YY_LAC_DISCARD ("YYBACKUP"); \]])[
goto yybackup; \
} \
else \
{ \
yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
YYERROR; \
} \
while (0)
/* Error token number */
#define YYTERROR 1
#define YYERRCODE 256
]b4_locations_if([[
]b4_yylloc_default_define[
#define YYRHSLOC(Rhs, K) ((Rhs)[K])
]])[
/* Enable debugging if requested. */
#if ]b4_api_PREFIX[DEBUG
# ifndef YYFPRINTF
# include /* INFRINGES ON USER NAME SPACE */
# define YYFPRINTF fprintf
# endif
# define YYDPRINTF(Args) \
do { \
if (yydebug) \
YYFPRINTF Args; \
} while (0)
]b4_yy_location_print_define[
# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
do { \
if (yydebug) \
{ \
YYFPRINTF (stderr, "%s ", Title); \
yy_symbol_print (stderr, \
Type, Value]b4_locations_if([, Location])[]b4_user_args[); \
YYFPRINTF (stderr, "\n"); \
} \
} while (0)
]b4_yy_symbol_print_define[
/*------------------------------------------------------------------.
| yy_stack_print -- Print the state stack from its BOTTOM up to its |
| TOP (included). |
`------------------------------------------------------------------*/
]b4_function_define([yy_stack_print], [static void],
[[yytype_int16 *yybottom], [yybottom]],
[[yytype_int16 *yytop], [yytop]])[
{
YYFPRINTF (stderr, "Stack now");
for (; yybottom <= yytop; yybottom++)
{
int yybot = *yybottom;
YYFPRINTF (stderr, " %d", yybot);
}
YYFPRINTF (stderr, "\n");
}
# define YY_STACK_PRINT(Bottom, Top) \
do { \
if (yydebug) \
yy_stack_print ((Bottom), (Top)); \
} while (0)
/*------------------------------------------------.
| Report that the YYRULE is going to be reduced. |
`------------------------------------------------*/
]b4_function_define([yy_reduce_print], [static void],
[[yytype_int16 *yyssp], [yyssp]],
[[YYSTYPE *yyvsp], [yyvsp]],
b4_locations_if([[[YYLTYPE *yylsp], [yylsp]],
])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [,
b4_parse_param]))[
{
unsigned long int yylno = yyrline[yyrule];
int yynrhs = yyr2[yyrule];
int yyi;
YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n",
yyrule - 1, yylno);
/* The symbols being reduced. */
for (yyi = 0; yyi < yynrhs; yyi++)
{
YYFPRINTF (stderr, " $%d = ", yyi + 1);
yy_symbol_print (stderr,
yystos[yyssp[yyi + 1 - yynrhs]],
&]b4_rhs_value(yynrhs, yyi + 1)[
]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
b4_user_args[);
YYFPRINTF (stderr, "\n");
}
}
# define YY_REDUCE_PRINT(Rule) \
do { \
if (yydebug) \
yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \
} while (0)
/* Nonzero means print parse trace. It is left uninitialized so that
multiple parsers can coexist. */
int yydebug;
#else /* !]b4_api_PREFIX[DEBUG */
# define YYDPRINTF(Args)
# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
# define YY_STACK_PRINT(Bottom, Top)
# define YY_REDUCE_PRINT(Rule)
#endif /* !]b4_api_PREFIX[DEBUG */
/* YYINITDEPTH -- initial size of the parser's stacks. */
#ifndef YYINITDEPTH
# define YYINITDEPTH ]b4_stack_depth_init[
#endif
/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
if the built-in stack extension method is used).
Do not make this value too large; the results are undefined if
YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
evaluated with infinite-precision integer arithmetic. */
#ifndef YYMAXDEPTH
# define YYMAXDEPTH ]b4_stack_depth_max[
#endif]b4_lac_if([[
/* Given a state stack such that *YYBOTTOM is its bottom, such that
*YYTOP is either its top or is YYTOP_EMPTY to indicate an empty
stack, and such that *YYCAPACITY is the maximum number of elements it
can hold without a reallocation, make sure there is enough room to
store YYADD more elements. If not, allocate a new stack using
YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM,
*YYTOP, and *YYCAPACITY to reflect the new capacity and memory
location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack
using YYSTACK_FREE. Return 0 if successful or if no reallocation is
required. Return 1 if memory is exhausted. */
static int
yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
#if ]b4_api_PREFIX[DEBUG
char const *yydebug_prefix,
char const *yydebug_suffix,
#endif
yytype_int16 **yybottom,
yytype_int16 *yybottom_no_free,
yytype_int16 **yytop, yytype_int16 *yytop_empty)
{
YYSIZE_T yysize_old =
*yytop == yytop_empty ? 0 : *yytop - *yybottom + 1;
YYSIZE_T yysize_new = yysize_old + yyadd;
if (*yycapacity < yysize_new)
{
YYSIZE_T yyalloc = 2 * yysize_new;
yytype_int16 *yybottom_new;
/* Use YYMAXDEPTH for maximum stack size given that the stack
should never need to grow larger than the main state stack
needs to grow without LAC. */
if (YYMAXDEPTH < yysize_new)
{
YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix,
yydebug_suffix));
return 1;
}
if (YYMAXDEPTH < yyalloc)
yyalloc = YYMAXDEPTH;
yybottom_new =
(yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new);
if (!yybottom_new)
{
YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix,
yydebug_suffix));
return 1;
}
if (*yytop != yytop_empty)
{
YYCOPY (yybottom_new, *yybottom, yysize_old);
*yytop = yybottom_new + (yysize_old - 1);
}
if (*yybottom != yybottom_no_free)
YYSTACK_FREE (*yybottom);
*yybottom = yybottom_new;
*yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]),
[full], [[
YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix,
(unsigned long int) yyalloc, yydebug_suffix));]])[
}
return 0;
}
/* Establish the initial context for the current lookahead if no initial
context is currently established.
We define a context as a snapshot of the parser stacks. We define
the initial context for a lookahead as the context in which the
parser initially examines that lookahead in order to select a
syntactic action. Thus, if the lookahead eventually proves
syntactically unacceptable (possibly in a later context reached via a
series of reductions), the initial context can be used to determine
the exact set of tokens that would be syntactically acceptable in the
lookahead's place. Moreover, it is the context after which any
further semantic actions would be erroneous because they would be
determined by a syntactically unacceptable token.
YY_LAC_ESTABLISH should be invoked when a reduction is about to be
performed in an inconsistent state (which, for the purposes of LAC,
includes consistent states that don't know they're consistent because
their default reductions have been disabled). Iff there is a
lookahead token, it should also be invoked before reporting a syntax
error. This latter case is for the sake of the debugging output.
For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as
follows. If no initial context is currently established for the
current lookahead, then check if that lookahead can eventually be
shifted if syntactic actions continue from the current context.
Report a syntax error if it cannot. */
#define YY_LAC_ESTABLISH \
do { \
if (!yy_lac_established) \
{ \
YYDPRINTF ((stderr, \
"LAC: initial context established for %s\n", \
yytname[yytoken])); \
yy_lac_established = 1; \
{ \
int yy_lac_status = \
yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \
if (yy_lac_status == 2) \
goto yyexhaustedlab; \
if (yy_lac_status == 1) \
goto yyerrlab; \
} \
} \
} while (0)
/* Discard any previous initial lookahead context because of Event,
which may be a lookahead change or an invalidation of the currently
established initial context for the current lookahead.
The most common example of a lookahead change is a shift. An example
of both cases is syntax error recovery. That is, a syntax error
occurs when the lookahead is syntactically erroneous for the
currently established initial context, so error recovery manipulates
the parser stacks to try to find a new initial context in which the
current lookahead is syntactically acceptable. If it fails to find
such a context, it discards the lookahead. */
#if ]b4_api_PREFIX[DEBUG
# define YY_LAC_DISCARD(Event) \
do { \
if (yy_lac_established) \
{ \
if (yydebug) \
YYFPRINTF (stderr, "LAC: initial context discarded due to " \
Event "\n"); \
yy_lac_established = 0; \
} \
} while (0)
#else
# define YY_LAC_DISCARD(Event) yy_lac_established = 0
#endif
/* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can
eventually (after perhaps some reductions) be shifted, return 1 if
not, or return 2 if memory is exhausted. As preconditions and
postconditions: *YYES_CAPACITY is the allocated size of the array to
which *YYES points, and either *YYES = YYESA or *YYES points to an
array allocated with YYSTACK_ALLOC. yy_lac may overwrite the
contents of either array, alter *YYES and *YYES_CAPACITY, and free
any old *YYES other than YYESA. */
static int
yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken)
{
yytype_int16 *yyes_prev = yyssp;
yytype_int16 *yyesp = yyes_prev;
YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken]));
if (yytoken == YYUNDEFTOK)
{
YYDPRINTF ((stderr, " Always Err\n"));
return 1;
}
while (1)
{
int yyrule = yypact[*yyesp];
if (yypact_value_is_default (yyrule)
|| (yyrule += yytoken) < 0 || YYLAST < yyrule
|| yycheck[yyrule] != yytoken)
{
yyrule = yydefact[*yyesp];
if (yyrule == 0)
{
YYDPRINTF ((stderr, " Err\n"));
return 1;
}
}
else
{
yyrule = yytable[yyrule];
if (yytable_value_is_error (yyrule))
{
YYDPRINTF ((stderr, " Err\n"));
return 1;
}
if (0 < yyrule)
{
YYDPRINTF ((stderr, " S%d\n", yyrule));
return 0;
}
yyrule = -yyrule;
}
{
YYSIZE_T yylen = yyr2[yyrule];
YYDPRINTF ((stderr, " R%d", yyrule - 1));
if (yyesp != yyes_prev)
{
YYSIZE_T yysize = yyesp - *yyes + 1;
if (yylen < yysize)
{
yyesp -= yylen;
yylen = 0;
}
else
{
yylen -= yysize;
yyesp = yyes_prev;
}
}
if (yylen)
yyesp = yyes_prev -= yylen;
}
{
int yystate;
{
int yylhs = yyr1[yyrule] - YYNTOKENS;
yystate = yypgoto[yylhs] + *yyesp;
if (yystate < 0 || YYLAST < yystate
|| yycheck[yystate] != *yyesp)
yystate = yydefgoto[yylhs];
else
yystate = yytable[yystate];
}
if (yyesp == yyes_prev)
{
yyesp = *yyes;
*yyesp = yystate;
}
else
{
if (yy_lac_stack_realloc (yyes_capacity, 1,
#if ]b4_api_PREFIX[DEBUG
" (", ")",
#endif
yyes, yyesa, &yyesp, yyes_prev))
{
YYDPRINTF ((stderr, "\n"));
return 2;
}
*++yyesp = yystate;
}
YYDPRINTF ((stderr, " G%d", yystate));
}
}
}]])[
#if YYERROR_VERBOSE
# ifndef yystrlen
# if defined __GLIBC__ && defined _STRING_H
# define yystrlen strlen
# else
/* Return the length of YYSTR. */
]b4_function_define([yystrlen], [static YYSIZE_T],
[[const char *yystr], [yystr]])[
{
YYSIZE_T yylen;
for (yylen = 0; yystr[yylen]; yylen++)
continue;
return yylen;
}
# endif
# endif
# ifndef yystpcpy
# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
# define yystpcpy stpcpy
# else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
YYDEST. */
]b4_function_define([yystpcpy], [static char *],
[[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[
{
char *yyd = yydest;
const char *yys = yysrc;
while ((*yyd++ = *yys++) != '\0')
continue;
return yyd - 1;
}
# endif
# endif
# ifndef yytnamerr
/* Copy to YYRES the contents of YYSTR after stripping away unnecessary
quotes and backslashes, so that it's suitable for yyerror. The
heuristic is that double-quoting is unnecessary unless the string
contains an apostrophe, a comma, or backslash (other than
backslash-backslash). YYSTR is taken from yytname. If YYRES is
null, do not copy; instead, return the length of what the result
would have been. */
static YYSIZE_T
yytnamerr (char *yyres, const char *yystr)
{
if (*yystr == '"')
{
YYSIZE_T yyn = 0;
char const *yyp = yystr;
for (;;)
switch (*++yyp)
{
case '\'':
case ',':
goto do_not_strip_quotes;
case '\\':
if (*++yyp != '\\')
goto do_not_strip_quotes;
/* Fall through. */
default:
if (yyres)
yyres[yyn] = *yyp;
yyn++;
break;
case '"':
if (yyres)
yyres[yyn] = '\0';
return yyn;
}
do_not_strip_quotes: ;
}
if (! yyres)
return yystrlen (yystr);
return yystpcpy (yyres, yystr) - yyres;
}
# endif
/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message
about the unexpected token YYTOKEN for the state stack whose top is
YYSSP.]b4_lac_if([[ In order to see if a particular token T is a
valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[
Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is
not large enough to hold the message. In that case, also set
*YYMSG_ALLOC to the required number of bytes. Return 2 if the
required number of bytes is too large to store]b4_lac_if([[ or if
yy_lac returned 2]])[. */
static int
yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
{
YYSIZE_T yysize0 = yytnamerr (YY_NULLPTR, yytname[yytoken]);
YYSIZE_T yysize = yysize0;
enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
/* Internationalized format string. */
const char *yyformat = YY_NULLPTR;
/* Arguments of yyformat. */
char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
/* Number of reported tokens (one for the "unexpected", one per
"expected"). */
int yycount = 0;
/* There are many possibilities here to consider:
- If this state is a consistent state with a default action, then
the only way this function was invoked is if the default action
is an error action. In that case, don't check for expected
tokens because there are none.
- The only way there can be no lookahead present (in yychar) is if
this state is a consistent state with a default action. Thus,
detecting the absence of a lookahead is sufficient to determine
that there is no unexpected or expected token to report. In that
case, just report a simple "syntax error".
- Don't assume there isn't a lookahead just because this state is a
consistent state with a default action. There might have been a
previous inconsistent state, consistent state with a non-default
action, or user semantic action that manipulated yychar.]b4_lac_if([[
In the first two cases, it might appear that the current syntax
error should have been detected in the previous state when yy_lac
was invoked. However, at that time, there might have been a
different syntax error that discarded a different initial context
during error recovery, leaving behind the current lookahead.]], [[
- Of course, the expected token list depends on states to have
correct lookahead information, and it depends on the parser not
to perform extra reductions after fetching a lookahead from the
scanner and before detecting a syntax error. Thus, state merging
(from LALR or IELR) and default reductions corrupt the expected
token list. However, the list is correct for canonical LR with
one exception: it will still contain any token that will not be
accepted due to an error action in a later state.]])[
*/
if (yytoken != YYEMPTY)
{
int yyn = yypact[*yyssp];]b4_lac_if([[
YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[
yyarg[yycount++] = yytname[yytoken];
if (!yypact_value_is_default (yyn))
{]b4_lac_if([], [[
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. In other words, skip the first -YYN actions for
this state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = YYLAST - yyn + 1;
int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[
int yyx;]b4_lac_if([[
for (yyx = 0; yyx < YYNTOKENS; ++yyx)
if (yyx != YYTERROR && yyx != YYUNDEFTOK)
{
{
int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity,
yyssp, yyx);
if (yy_lac_status == 2)
return 2;
if (yy_lac_status == 1)
continue;
}]], [[
for (yyx = yyxbegin; yyx < yyxend; ++yyx)
if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
&& !yytable_value_is_error (yytable[yyx + yyn]))
{]])[
if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
yycount = 1;
yysize = yysize0;
break;
}
yyarg[yycount++] = yytname[yyx];
{
YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULLPTR, yytname[yyx]);
if (! (yysize <= yysize1
&& yysize1 <= YYSTACK_ALLOC_MAXIMUM))
return 2;
yysize = yysize1;
}
}
}]b4_lac_if([[
# if ]b4_api_PREFIX[DEBUG
else if (yydebug)
YYFPRINTF (stderr, "No expected tokens.\n");
# endif]])[
}
switch (yycount)
{
# define YYCASE_(N, S) \
case N: \
yyformat = S; \
break
YYCASE_(0, YY_("syntax error"));
YYCASE_(1, YY_("syntax error, unexpected %s"));
YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
# undef YYCASE_
}
{
YYSIZE_T yysize1 = yysize + yystrlen (yyformat);
if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
return 2;
yysize = yysize1;
}
if (*yymsg_alloc < yysize)
{
*yymsg_alloc = 2 * yysize;
if (! (yysize <= *yymsg_alloc
&& *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM))
*yymsg_alloc = YYSTACK_ALLOC_MAXIMUM;
return 1;
}
/* Avoid sprintf, as that infringes on the user's name space.
Don't have undefined behavior even if the translation
produced a string with the wrong number of "%s"s. */
{
char *yyp = *yymsg;
int yyi = 0;
while ((*yyp = *yyformat) != '\0')
if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
{
yyp += yytnamerr (yyp, yyarg[yyi++]);
yyformat += 2;
}
else
{
yyp++;
yyformat++;
}
}
return 0;
}
#endif /* YYERROR_VERBOSE */
]b4_yydestruct_define[
]b4_pure_if([], [
b4_declare_scanner_communication_variables])[]b4_push_if([[
struct yypstate
{]b4_declare_parser_state_variables[
/* Used to determine if this is the first time this instance has
been used. */
int yynew;
};]b4_pure_if([], [[
static char yypstate_allocated = 0;]])b4_pull_if([
b4_function_define([[yyparse]], [[int]], b4_parse_param)[
{
return yypull_parse (YY_NULLPTR]m4_ifset([b4_parse_param],
[[, ]b4_args(b4_parse_param)])[);
}
]b4_function_define([[yypull_parse]], [[int]],
[[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [,
b4_parse_param]))[
{
int yystatus;
yypstate *yyps_local;]b4_pure_if([[
int yychar;
YYSTYPE yylval;]b4_locations_if([[
static YYLTYPE yyloc_default][]b4_yyloc_default[;
YYLTYPE yylloc = yyloc_default;]])])[
if (yyps)
yyps_local = yyps;
else
{
yyps_local = yypstate_new ();
if (!yyps_local)
{]b4_pure_if([[
yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[
if (!yypstate_allocated)
yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[
return 2;
}
}
do {
yychar = ]b4_lex[;
yystatus =
yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[);
} while (yystatus == YYPUSH_MORE);
if (!yyps)
yypstate_delete (yyps_local);
return yystatus;
}]])[
/* Initialize the parser data structure. */
]b4_function_define([[yypstate_new]], [[yypstate *]])[
{
yypstate *yyps;]b4_pure_if([], [[
if (yypstate_allocated)
return YY_NULLPTR;]])[
yyps = (yypstate *) malloc (sizeof *yyps);
if (!yyps)
return YY_NULLPTR;
yyps->yynew = 1;]b4_pure_if([], [[
yypstate_allocated = 1;]])[
return yyps;
}
]b4_function_define([[yypstate_delete]], [[void]],
[[[yypstate *yyps]], [[yyps]]])[
{
#ifndef yyoverflow
/* If the stack was reallocated but the parse did not complete, then the
stack still needs to be freed. */
if (!yyps->yynew && yyps->yyss != yyps->yyssa)
YYSTACK_FREE (yyps->yyss);
#endif]b4_lac_if([[
if (!yyps->yynew && yyps->yyes != yyps->yyesa)
YYSTACK_FREE (yyps->yyes);]])[
free (yyps);]b4_pure_if([], [[
yypstate_allocated = 0;]])[
}
]b4_pure_if([[
#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[
#define yystate yyps->yystate
#define yyerrstatus yyps->yyerrstatus
#define yyssa yyps->yyssa
#define yyss yyps->yyss
#define yyssp yyps->yyssp
#define yyvsa yyps->yyvsa
#define yyvs yyps->yyvs
#define yyvsp yyps->yyvsp]b4_locations_if([[
#define yylsa yyps->yylsa
#define yyls yyps->yyls
#define yylsp yyps->yylsp
#define yyerror_range yyps->yyerror_range]])[
#define yystacksize yyps->yystacksize]b4_lac_if([[
#define yyesa yyps->yyesa
#define yyes yyps->yyes
#define yyes_capacity yyps->yyes_capacity]])[
/*---------------.
| yypush_parse. |
`---------------*/
]b4_function_define([[yypush_parse]], [[int]],
[[[yypstate *yyps]], [[yyps]]]b4_pure_if([,
[[[int yypushed_char]], [[yypushed_char]]],
[[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([,
[[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [,
b4_parse_param]))], [[
/*----------.
| yyparse. |
`----------*/
]b4_function_define([yyparse], [int], b4_parse_param)])[
{]b4_pure_if([b4_declare_scanner_communication_variables
])b4_push_if([b4_pure_if([], [[
int yypushed_char = yychar;
YYSTYPE yypushed_val = yylval;]b4_locations_if([[
YYLTYPE yypushed_loc = yylloc;]])
])],
[b4_declare_parser_state_variables
])b4_lac_if([[
int yy_lac_established = 0;]])[
int yyn;
int yyresult;
/* Lookahead token as an internal (translated) token number. */
int yytoken = 0;
/* The variables used to return semantic value and location from the
action routines. */
YYSTYPE yyval;]b4_locations_if([[
YYLTYPE yyloc;]])[
#if YYERROR_VERBOSE
/* Buffer for error messages, and its allocated size. */
char yymsgbuf[128];
char *yymsg = yymsgbuf;
YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
#endif
#define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[)
/* The number of symbols on the RHS of the reduced rule.
Keep to zero when no symbol should be popped. */
int yylen = 0;]b4_push_if([[
if (!yyps->yynew)
{
yyn = yypact[yystate];
goto yyread_pushed_token;
}]])[
yyssp = yyss = yyssa;
yyvsp = yyvs = yyvsa;]b4_locations_if([[
yylsp = yyls = yylsa;]])[
yystacksize = YYINITDEPTH;]b4_lac_if([[
yyes = yyesa;
yyes_capacity = sizeof yyesa / sizeof *yyes;
if (YYMAXDEPTH < yyes_capacity)
yyes_capacity = YYMAXDEPTH;]])[
YYDPRINTF ((stderr, "Starting parse\n"));
yystate = 0;
yyerrstatus = 0;
yynerrs = 0;
yychar = YYEMPTY; /* Cause a token to be read. */
]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [],
[b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl
/* User initialization code. */
b4_user_initial_action
b4_dollar_popdef[]dnl
m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval;
]])])dnl
b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[;
]])dnl
[ goto yysetstate;
/*------------------------------------------------------------.
| yynewstate -- Push a new state, which is found in yystate. |
`------------------------------------------------------------*/
yynewstate:
/* In all cases, when you get here, the value and location stacks
have just been pushed. So pushing a state here evens the stacks. */
yyssp++;
yysetstate:
*yyssp = yystate;
if (yyss + yystacksize - 1 <= yyssp)
{
/* Get the current used size of the three stacks, in elements. */
YYSIZE_T yysize = yyssp - yyss + 1;
#ifdef yyoverflow
{
/* Give user a chance to reallocate the stack. Use copies of
these so that the &'s don't force the real ones into
memory. */
YYSTYPE *yyvs1 = yyvs;
yytype_int16 *yyss1 = yyss;]b4_locations_if([
YYLTYPE *yyls1 = yyls;])[
/* Each stack pointer address is followed by the size of the
data in use in that stack, in bytes. This used to be a
conditional around just the two extra args, but that might
be undefined if yyoverflow is a macro. */
yyoverflow (YY_("memory exhausted"),
&yyss1, yysize * sizeof (*yyssp),
&yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
&yyls1, yysize * sizeof (*yylsp),])[
&yystacksize);
]b4_locations_if([
yyls = yyls1;])[
yyss = yyss1;
yyvs = yyvs1;
}
#else /* no yyoverflow */
# ifndef YYSTACK_RELOCATE
goto yyexhaustedlab;
# else
/* Extend the stack our own way. */
if (YYMAXDEPTH <= yystacksize)
goto yyexhaustedlab;
yystacksize *= 2;
if (YYMAXDEPTH < yystacksize)
yystacksize = YYMAXDEPTH;
{
yytype_int16 *yyss1 = yyss;
union yyalloc *yyptr =
(union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
if (! yyptr)
goto yyexhaustedlab;
YYSTACK_RELOCATE (yyss_alloc, yyss);
YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([
YYSTACK_RELOCATE (yyls_alloc, yyls);])[
# undef YYSTACK_RELOCATE
if (yyss1 != yyssa)
YYSTACK_FREE (yyss1);
}
# endif
#endif /* no yyoverflow */
yyssp = yyss + yysize - 1;
yyvsp = yyvs + yysize - 1;]b4_locations_if([
yylsp = yyls + yysize - 1;])[
YYDPRINTF ((stderr, "Stack size increased to %lu\n",
(unsigned long int) yystacksize));
if (yyss + yystacksize - 1 <= yyssp)
YYABORT;
}
YYDPRINTF ((stderr, "Entering state %d\n", yystate));
if (yystate == YYFINAL)
YYACCEPT;
goto yybackup;
/*-----------.
| yybackup. |
`-----------*/
yybackup:
/* Do appropriate processing given the current state. Read a
lookahead token if we need one and don't already have one. */
/* First try to decide what to do without reference to lookahead token. */
yyn = yypact[yystate];
if (yypact_value_is_default (yyn))
goto yydefault;
/* Not known => get a lookahead token if don't already have one. */
/* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
if (yychar == YYEMPTY)
{]b4_push_if([[
if (!yyps->yynew)
{]b4_use_push_for_pull_if([], [[
YYDPRINTF ((stderr, "Return for a new token:\n"));]])[
yyresult = YYPUSH_MORE;
goto yypushreturn;
}
yyps->yynew = 0;]b4_pure_if([], [[
/* Restoring the pushed token is only necessary for the first
yypush_parse invocation since subsequent invocations don't overwrite
it before jumping to yyread_pushed_token. */
yychar = yypushed_char;
yylval = yypushed_val;]b4_locations_if([[
yylloc = yypushed_loc;]])])[
yyread_pushed_token:]])[
YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[
yychar = yypushed_char;
if (yypushed_val)
yylval = *yypushed_val;]b4_locations_if([[
if (yypushed_loc)
yylloc = *yypushed_loc;]])])], [[
yychar = ]b4_lex[;]])[
}
if (yychar <= YYEOF)
{
yychar = yytoken = YYEOF;
YYDPRINTF ((stderr, "Now at end of input.\n"));
}
else
{
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
/* If the proper action on seeing token YYTOKEN is to reduce or to
detect an error, take that action. */
yyn += yytoken;
if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[
{
YY_LAC_ESTABLISH;
goto yydefault;
}]], [[
goto yydefault;]])[
yyn = yytable[yyn];
if (yyn <= 0)
{
if (yytable_value_is_error (yyn))
goto yyerrlab;]b4_lac_if([[
YY_LAC_ESTABLISH;]])[
yyn = -yyn;
goto yyreduce;
}
/* Count tokens shifted since error; after three, turn off error
status. */
if (yyerrstatus)
yyerrstatus--;
/* Shift the lookahead token. */
YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
/* Discard the shifted token. */
yychar = YYEMPTY;]b4_lac_if([[
YY_LAC_DISCARD ("shift");]])[
yystate = yyn;
YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
*++yyvsp = yylval;
YY_IGNORE_MAYBE_UNINITIALIZED_END
]b4_locations_if([ *++yylsp = yylloc;])[
goto yynewstate;
/*-----------------------------------------------------------.
| yydefault -- do the default action for the current state. |
`-----------------------------------------------------------*/
yydefault:
yyn = yydefact[yystate];
if (yyn == 0)
goto yyerrlab;
goto yyreduce;
/*-----------------------------.
| yyreduce -- Do a reduction. |
`-----------------------------*/
yyreduce:
/* yyn is the number of a rule to reduce with. */
yylen = yyr2[yyn];
/* If YYLEN is nonzero, implement the default value of the action:
'$$ = $1'.
Otherwise, the following line sets YYVAL to garbage.
This behavior is undocumented and Bison
users should not rely upon it. Assigning to YYVAL
unconditionally makes the parser a bit smaller, and it avoids a
GCC warning that YYVAL may be used uninitialized. */
yyval = yyvsp[1-yylen];
]b4_locations_if(
[[ /* Default location. */
YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[
YY_REDUCE_PRINT (yyn);]b4_lac_if([[
{
int yychar_backup = yychar;
switch (yyn)
{
]b4_user_actions[
default: break;
}
if (yychar_backup != yychar)
YY_LAC_DISCARD ("yychar change");
}]], [[
switch (yyn)
{
]b4_user_actions[
default: break;
}]])[
/* User semantic actions sometimes alter yychar, and that requires
that yytoken be updated with the new translation. We take the
approach of translating immediately before every use of yytoken.
One alternative is translating here after every semantic action,
but that translation would be missed if the semantic action invokes
YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an
incorrect destructor might then be invoked immediately. In the
case of YYERROR or YYBACKUP, subsequent parser actions might lead
to an incorrect destructor call or verbose syntax error message
before the lookahead is translated. */
YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc);
YYPOPSTACK (yylen);
yylen = 0;
YY_STACK_PRINT (yyss, yyssp);
*++yyvsp = yyval;]b4_locations_if([
*++yylsp = yyloc;])[
/* Now 'shift' the result of the reduction. Determine what state
that goes to, based on the state we popped back to and the rule
number reduced by. */
yyn = yyr1[yyn];
yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
yystate = yytable[yystate];
else
yystate = yydefgoto[yyn - YYNTOKENS];
goto yynewstate;
/*--------------------------------------.
| yyerrlab -- here on detecting error. |
`--------------------------------------*/
yyerrlab:
/* Make sure we have latest lookahead translation. See comments at
user semantic actions for why this is necessary. */
yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
/* If not already recovering from an error, report this error. */
if (!yyerrstatus)
{
++yynerrs;
#if ! YYERROR_VERBOSE
yyerror (]b4_yyerror_args[YY_("syntax error"));
#else
# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[
yyesa, &yyes, &yyes_capacity, \]])[
yyssp, yytoken)
{
char const *yymsgp = YY_("syntax error");
int yysyntax_error_status;]b4_lac_if([[
if (yychar != YYEMPTY)
YY_LAC_ESTABLISH;]])[
yysyntax_error_status = YYSYNTAX_ERROR;
if (yysyntax_error_status == 0)
yymsgp = yymsg;
else if (yysyntax_error_status == 1)
{
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc);
if (!yymsg)
{
yymsg = yymsgbuf;
yymsg_alloc = sizeof yymsgbuf;
yysyntax_error_status = 2;
}
else
{
yysyntax_error_status = YYSYNTAX_ERROR;
yymsgp = yymsg;
}
}
yyerror (]b4_yyerror_args[yymsgp);
if (yysyntax_error_status == 2)
goto yyexhaustedlab;
}
# undef YYSYNTAX_ERROR
#endif
}
]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
if (yyerrstatus == 3)
{
/* If just tried and failed to reuse lookahead token after an
error, discard it. */
if (yychar <= YYEOF)
{
/* Return failure if at end of input. */
if (yychar == YYEOF)
YYABORT;
}
else
{
yydestruct ("Error: discarding",
yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
yychar = YYEMPTY;
}
}
/* Else will try to reuse lookahead token after shifting the error
token. */
goto yyerrlab1;
/*---------------------------------------------------.
| yyerrorlab -- error raised explicitly by YYERROR. |
`---------------------------------------------------*/
yyerrorlab:
/* Pacify compilers like GCC when the user code never invokes
YYERROR and the label yyerrorlab therefore never appears in user
code. */
if (/*CONSTCOND*/ 0)
goto yyerrorlab;
]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
]])[ /* Do not reclaim the symbols of the rule whose action triggered
this YYERROR. */
YYPOPSTACK (yylen);
yylen = 0;
YY_STACK_PRINT (yyss, yyssp);
yystate = *yyssp;
goto yyerrlab1;
/*-------------------------------------------------------------.
| yyerrlab1 -- common code for both syntax error and YYERROR. |
`-------------------------------------------------------------*/
yyerrlab1:
yyerrstatus = 3; /* Each real token shifted decrements this. */
for (;;)
{
yyn = yypact[yystate];
if (!yypact_value_is_default (yyn))
{
yyn += YYTERROR;
if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
{
yyn = yytable[yyn];
if (0 < yyn)
break;
}
}
/* Pop the current state because it cannot handle the error token. */
if (yyssp == yyss)
YYABORT;
]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
yydestruct ("Error: popping",
yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
YYPOPSTACK (1);
yystate = *yyssp;
YY_STACK_PRINT (yyss, yyssp);
}]b4_lac_if([[
/* If the stack popping above didn't lose the initial context for the
current lookahead token, the shift below will for sure. */
YY_LAC_DISCARD ("error recovery");]])[
YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
*++yyvsp = yylval;
YY_IGNORE_MAYBE_UNINITIALIZED_END
]b4_locations_if([[
yyerror_range[2] = yylloc;
/* Using YYLLOC is tempting, but would change the location of
the lookahead. YYLOC is available though. */
YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
*++yylsp = yyloc;]])[
/* Shift the error token. */
YY_SYMBOL_PRINT ("Shifting", yystos[yyn], yyvsp, yylsp);
yystate = yyn;
goto yynewstate;
/*-------------------------------------.
| yyacceptlab -- YYACCEPT comes here. |
`-------------------------------------*/
yyacceptlab:
yyresult = 0;
goto yyreturn;
/*-----------------------------------.
| yyabortlab -- YYABORT comes here. |
`-----------------------------------*/
yyabortlab:
yyresult = 1;
goto yyreturn;
#if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
/*-------------------------------------------------.
| yyexhaustedlab -- memory exhaustion comes here. |
`-------------------------------------------------*/
yyexhaustedlab:
yyerror (]b4_yyerror_args[YY_("memory exhausted"));
yyresult = 2;
/* Fall through. */
#endif
yyreturn:
if (yychar != YYEMPTY)
{
/* Make sure we have latest lookahead translation. See comments at
user semantic actions for why this is necessary. */
yytoken = YYTRANSLATE (yychar);
yydestruct ("Cleanup: discarding lookahead",
yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[);
}
/* Do not reclaim the symbols of the rule whose action triggered
this YYABORT or YYACCEPT. */
YYPOPSTACK (yylen);
YY_STACK_PRINT (yyss, yyssp);
while (yyssp != yyss)
{
yydestruct ("Cleanup: popping",
yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
YYPOPSTACK (1);
}
#ifndef yyoverflow
if (yyss != yyssa)
YYSTACK_FREE (yyss);
#endif]b4_lac_if([[
if (yyes != yyesa)
YYSTACK_FREE (yyes);]])b4_push_if([[
yyps->yynew = 1;
yypushreturn:]])[
#if YYERROR_VERBOSE
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
#endif
return yyresult;
}
]b4_epilogue[]dnl
b4_output_end()
b4_defines_if(
[b4_output_begin([b4_spec_defines_file])[
]b4_copyright([Bison interface for Yacc-like parsers in C])[
]b4_shared_declarations[
]b4_output_end()
])# b4_defines_if
PK lCiZT67
c-like.m4nu [ -*- Autoconf -*-
# Common code for C-like languages (C, C++, Java, etc.)
# Copyright (C) 2012-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
# b4_comment_(TEXT, OPEN, CONTINUE, END)
# --------------------------------------
# Put TEXT in comment. Avoid trailing spaces: don't indent empty lines.
# Avoid adding indentation to the first line, as the indentation comes
# from OPEN. That's why we don't patsubst([$1], [^\(.\)], [ \1]).
#
# Prefix all the output lines with PREFIX.
m4_define([b4_comment_],
[$2[]m4_bpatsubst(m4_expand([[$1]]), [
\(.\)], [
$3\1])$4])
# b4_comment(TEXT, [PREFIX])
# --------------------------
# Put TEXT in comment. Prefix all the output lines with PREFIX.
m4_define([b4_comment],
[b4_comment_([$1], [$2/* ], [$2 ], [ */])])
# b4_dollar_dollar_(VALUE, FIELD, DEFAULT-FIELD)
# ----------------------------------------------
# If FIELD (or DEFAULT-FIELD) is non-null, return "VALUE.FIELD",
# otherwise just VALUE. Be sure to pass "(VALUE)" is VALUE is a
# pointer.
m4_define([b4_dollar_dollar_],
[b4_symbol_value([$1],
m4_if([$2], [[]],
[[$3]], [[$2]]))])
# b4_dollar_pushdef(VALUE-POINTER, DEFAULT-FIELD, LOCATION)
# b4_dollar_popdef
# ---------------------------------------------------------
# Define b4_dollar_dollar for VALUE and DEFAULT-FIELD,
# and b4_at_dollar for LOCATION.
m4_define([b4_dollar_pushdef],
[m4_pushdef([b4_dollar_dollar],
[b4_dollar_dollar_([$1], m4_dquote($][1), [$2])])dnl
m4_pushdef([b4_at_dollar], [$3])dnl
])
m4_define([b4_dollar_popdef],
[m4_popdef([b4_at_dollar])dnl
m4_popdef([b4_dollar_dollar])dnl
])
PK lCiZѧ* * glr.ccnu [ # C++ GLR skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
# This skeleton produces a C++ class that encapsulates a C glr parser.
# This is in order to reduce the maintenance burden. The glr.c
# skeleton is clean and pure enough so that there are no real
# problems. The C++ interface is the same as that of lalr1.cc. In
# fact, glr.c can replace yacc.c without the user noticing any
# difference, and similarly for glr.cc replacing lalr1.cc.
#
# The passing of parse-params
#
# The additional arguments are stored as members of the parser
# object, yyparser. The C routines need to carry yyparser
# throughout the C parser; that's easy: make yyparser an
# additional parse-param. But because the C++ skeleton needs to
# know the "real" original parse-param, we save them
# (b4_parse_param_orig). Note that b4_parse_param is overquoted
# (and c.m4 strips one level of quotes). This is a PITA, and
# explains why there are so many levels of quotes.
#
# The locations
#
# We use location.cc just like lalr1.cc, but because glr.c stores
# the locations in a union, the position and location classes
# must not have a constructor. Therefore, contrary to lalr1.cc, we
# must not define "b4_location_constructors". As a consequence the
# user must initialize the first positions (in particular the
# filename member).
# We require a pure interface.
m4_define([b4_pure_flag], [1])
m4_include(b4_pkgdatadir/[c++.m4])
b4_bison_locations_if([m4_include(b4_pkgdatadir/[location.cc])])
m4_define([b4_parser_class_name],
[b4_percent_define_get([[parser_class_name]])])
# Save the parse parameters.
m4_define([b4_parse_param_orig], m4_defn([b4_parse_param]))
# b4_parse_param_wrap
# -------------------
# New ones.
m4_ifset([b4_parse_param],
[m4_define([b4_parse_param_wrap],
[[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]],]
m4_defn([b4_parse_param]))],
[m4_define([b4_parse_param_wrap],
[[b4_namespace_ref::b4_parser_class_name[& yyparser], [[yyparser]]]])
])
# b4_yy_symbol_print_define
# -------------------------
# Bypass the default implementation to generate the "yy_symbol_print"
# and "yy_symbol_value_print" functions.
m4_define([b4_yy_symbol_print_define],
[[
/*--------------------.
| Print this symbol. |
`--------------------*/
]b4_function_define([yy_symbol_print],
[static void],
[[FILE *], []],
[[int yytype], [yytype]],
[[const ]b4_namespace_ref::b4_parser_class_name[::semantic_type *yyvaluep],
[yyvaluep]][]dnl
b4_locations_if([,
[[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
[yylocationp]]]),
b4_parse_param)[
{
]b4_parse_param_use[]dnl
[ yyparser.yy_symbol_print_ (yytype, yyvaluep]b4_locations_if([, yylocationp])[);
}
]])[
# Hijack the initial action to initialize the locations.
]b4_bison_locations_if([m4_define([b4_initial_action],
[yylloc.initialize ();]m4_ifdef([b4_initial_action], [
m4_defn([b4_initial_action])]))])[
# Hijack the post prologue to insert early definition of YYLLOC_DEFAULT
# and declaration of yyerror.
]m4_append([b4_post_prologue],
[b4_syncline([@oline@], [@ofile@])[
]b4_yylloc_default_define[
#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
]b4_function_declare([yyerror],
[static void],b4_locations_if([
[[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
[yylocationp]],])
b4_parse_param,
[[const char* msg], [msg]])])
#undef yynerrs
#undef yychar
#undef yylval]b4_locations_if([
#undef yylloc])
m4_if(b4_prefix, [yy], [],
[[/* Substitute the variable and function names. */
#define yyparse ]b4_prefix[parse
#define yylex ]b4_prefix[lex
#define yyerror ]b4_prefix[error
#define yydebug ]b4_prefix[debug
]]b4_pure_if([], [[
#define yylval ]b4_prefix[lval
#define yychar ]b4_prefix[char
#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
#define yylloc ]b4_prefix[lloc]])]))
# Hijack the epilogue to define implementations (yyerror, parser member
# functions etc.).
m4_append([b4_epilogue],
[b4_syncline([@oline@], [@ofile@])[
/*------------------.
| Report an error. |
`------------------*/
]b4_function_define([yyerror],
[static void],b4_locations_if([
[[const ]b4_namespace_ref::b4_parser_class_name[::location_type *yylocationp],
[yylocationp]],])
b4_parse_param,
[[const char* msg], [msg]])[
{
]b4_parse_param_use[]dnl
[ yyparser.error (]b4_locations_if([[*yylocationp, ]])[msg);
}
]b4_namespace_open[
]dnl In this section, the parse params are the original parse_params.
m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
[ /// Build a parser object.
]b4_parser_class_name::b4_parser_class_name[ (]b4_parse_param_decl[)]m4_ifset([b4_parse_param], [
:])[
#if ]b4_api_PREFIX[DEBUG
]m4_ifset([b4_parse_param], [ ], [ :])[yycdebug_ (&std::cerr)]m4_ifset([b4_parse_param], [,])[
#endif]b4_parse_param_cons[
{
}
]b4_parser_class_name::~b4_parser_class_name[ ()
{
}
int
]b4_parser_class_name[::parse ()
{
return ::yyparse (*this]b4_user_args[);
}
#if ]b4_api_PREFIX[DEBUG
/*--------------------.
| Print this symbol. |
`--------------------*/
inline void
]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
const semantic_type* yyvaluep]b4_locations_if([[,
const location_type* yylocationp]])[)
{]b4_locations_if([[
YYUSE (yylocationp);]])[
YYUSE (yyvaluep);
std::ostream& yyoutput = debug_stream ();
std::ostream& yyo = yyoutput;
YYUSE (yyo);
]b4_symbol_actions([printer])[
}
void
]b4_parser_class_name[::yy_symbol_print_ (int yytype,
const semantic_type* yyvaluep]b4_locations_if([[,
const location_type* yylocationp]])[)
{
*yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
<< ' ' << yytname[yytype] << " ("]b4_locations_if([[
<< *yylocationp << ": "]])[;
yy_symbol_value_print_ (yytype, yyvaluep]b4_locations_if([[, yylocationp]])[);
*yycdebug_ << ')';
}
std::ostream&
]b4_parser_class_name[::debug_stream () const
{
return *yycdebug_;
}
void
]b4_parser_class_name[::set_debug_stream (std::ostream& o)
{
yycdebug_ = &o;
}
]b4_parser_class_name[::debug_level_type
]b4_parser_class_name[::debug_level () const
{
return yydebug;
}
void
]b4_parser_class_name[::set_debug_level (debug_level_type l)
{
// Actually, it is yydebug which is really used.
yydebug = l;
}
#endif
]m4_popdef([b4_parse_param])dnl
b4_namespace_close
])
# b4_shared_declarations
# ----------------------
# Declaration that might either go into the header (if --defines)
# or open coded in the parser body.
m4_define([b4_shared_declarations],
[m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl
b4_percent_code_get([[requires]])[
#include
#include
#include ]b4_defines_if([
b4_bison_locations_if([[#include "location.hh"]])])[
]b4_YYDEBUG_define[
]b4_namespace_open[
]b4_defines_if([],
[b4_bison_locations_if([b4_position_define
b4_location_define])])[
/// A Bison parser.
class ]b4_parser_class_name[
{
public:
]b4_public_types_declare[
/// Build a parser object.
]b4_parser_class_name[ (]b4_parse_param_decl[);
virtual ~]b4_parser_class_name[ ();
/// Parse.
/// \returns 0 iff parsing succeeded.
virtual int parse ();
/// The current debugging stream.
std::ostream& debug_stream () const;
/// Set the current debugging stream.
void set_debug_stream (std::ostream &);
/// Type for debugging levels.
typedef int debug_level_type;
/// The current debugging level.
debug_level_type debug_level () const;
/// Set the current debugging level.
void set_debug_level (debug_level_type l);
public:
/// Report a syntax error.]b4_locations_if([[
/// \param loc where the syntax error is found.]])[
/// \param msg a description of the syntax error.
virtual void error (]b4_locations_if([[const location_type& loc, ]])[const std::string& msg);
# if ]b4_api_PREFIX[DEBUG
public:
/// \brief Report a symbol value on the debug stream.
/// \param yytype The token type.
/// \param yyvaluep Its semantic value.]b4_locations_if([[
/// \param yylocationp Its location.]])[
virtual void yy_symbol_value_print_ (int yytype,
const semantic_type* yyvaluep]b4_locations_if([[,
const location_type* yylocationp]])[);
/// \brief Report a symbol on the debug stream.
/// \param yytype The token type.
/// \param yyvaluep Its semantic value.]b4_locations_if([[
/// \param yylocationp Its location.]])[
virtual void yy_symbol_print_ (int yytype,
const semantic_type* yyvaluep]b4_locations_if([[,
const location_type* yylocationp]])[);
private:
// Debugging.
std::ostream* yycdebug_;
#endif
]b4_parse_param_vars[
};
]dnl Redirections for glr.c.
b4_percent_define_flag_if([[global_tokens_and_yystype]],
[b4_token_defines])
[
#ifndef ]b4_api_PREFIX[STYPE
# define ]b4_api_PREFIX[STYPE ]b4_namespace_ref[::]b4_parser_class_name[::semantic_type
#endif
#ifndef ]b4_api_PREFIX[LTYPE
# define ]b4_api_PREFIX[LTYPE ]b4_namespace_ref[::]b4_parser_class_name[::location_type
#endif
]b4_namespace_close[
]b4_percent_code_get([[provides]])[
]m4_popdef([b4_parse_param])dnl
])
b4_defines_if(
[b4_output_begin([b4_spec_defines_file])
b4_copyright([Skeleton interface for Bison GLR parsers in C++],
[2002-2015])[
// C++ GLR parser skeleton written by Akim Demaille.
]b4_cpp_guard_open([b4_spec_defines_file])[
]b4_shared_declarations[
]b4_cpp_guard_close([b4_spec_defines_file])[
]b4_output_end()])
# Let glr.c (and b4_shared_declarations) believe that the user
# arguments include the parser itself.
m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_wrap]))
m4_include(b4_pkgdatadir/[glr.c])
m4_popdef([b4_parse_param])
PK lCiZ_& &
variant.hhnu [ # C++ skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
## --------- ##
## variant. ##
## --------- ##
# b4_symbol_variant(YYTYPE, YYVAL, ACTION, [ARGS])
# ------------------------------------------------
# Run some ACTION ("build", or "destroy") on YYVAL of symbol type
# YYTYPE.
m4_define([b4_symbol_variant],
[m4_pushdef([b4_dollar_dollar],
[$2.$3< $][3 > (m4_shift3($@))])dnl
switch ($1)
{
b4_type_foreach([b4_type_action_])[]dnl
default:
break;
}
m4_popdef([b4_dollar_dollar])dnl
])
# _b4_char_sizeof_counter
# -----------------------
# A counter used by _b4_char_sizeof_dummy to create fresh symbols.
m4_define([_b4_char_sizeof_counter],
[0])
# _b4_char_sizeof_dummy
# ---------------------
# At each call return a new C++ identifier.
m4_define([_b4_char_sizeof_dummy],
[m4_define([_b4_char_sizeof_counter], m4_incr(_b4_char_sizeof_counter))dnl
dummy[]_b4_char_sizeof_counter])
# b4_char_sizeof(SYMBOL-NUMS)
# ---------------------------
# To be mapped on the list of type names to produce:
#
# char dummy1[sizeof(type_name_1)];
# char dummy2[sizeof(type_name_2)];
#
# for defined type names.
m4_define([b4_char_sizeof],
[b4_symbol_if([$1], [has_type],
[
m4_map([ b4_symbol_tag_comment], [$@])dnl
char _b4_char_sizeof_dummy@{sizeof(b4_symbol([$1], [type]))@};
])])
# b4_variant_includes
# -------------------
# The needed includes for variants support.
m4_define([b4_variant_includes],
[b4_parse_assert_if([[#include ]])[
#ifndef YYASSERT
# include
# define YYASSERT assert
#endif
]])
# b4_variant_define
# -----------------
# Define "variant".
m4_define([b4_variant_define],
[[ /// A char[S] buffer to store and retrieve objects.
///
/// Sort of a variant, but does not keep track of the nature
/// of the stored data, since that knowledge is available
/// via the current state.
template
struct variant
{
/// Type of *this.
typedef variant self_type;
/// Empty construction.
variant ()]b4_parse_assert_if([
: yytypeid_ (YY_NULLPTR)])[
{}
/// Construct and fill.
template
variant (const T& t)]b4_parse_assert_if([
: yytypeid_ (&typeid (T))])[
{
YYASSERT (sizeof (T) <= S);
new (yyas_ ()) T (t);
}
/// Destruction, allowed only if empty.
~variant ()
{]b4_parse_assert_if([
YYASSERT (!yytypeid_);
])[}
/// Instantiate an empty \a T in here.
template
T&
build ()
{]b4_parse_assert_if([
YYASSERT (!yytypeid_);
YYASSERT (sizeof (T) <= S);
yytypeid_ = & typeid (T);])[
return *new (yyas_ ()) T;
}
/// Instantiate a \a T in here from \a t.
template
T&
build (const T& t)
{]b4_parse_assert_if([
YYASSERT (!yytypeid_);
YYASSERT (sizeof (T) <= S);
yytypeid_ = & typeid (T);])[
return *new (yyas_ ()) T (t);
}
/// Accessor to a built \a T.
template
T&
as ()
{]b4_parse_assert_if([
YYASSERT (*yytypeid_ == typeid (T));
YYASSERT (sizeof (T) <= S);])[
return *yyas_ ();
}
/// Const accessor to a built \a T (for %printer).
template
const T&
as () const
{]b4_parse_assert_if([
YYASSERT (*yytypeid_ == typeid (T));
YYASSERT (sizeof (T) <= S);])[
return *yyas_ ();
}
/// Swap the content with \a other, of same type.
///
/// Both variants must be built beforehand, because swapping the actual
/// data requires reading it (with as()), and this is not possible on
/// unconstructed variants: it would require some dynamic testing, which
/// should not be the variant's responsability.
/// Swapping between built and (possibly) non-built is done with
/// variant::move ().
template
void
swap (self_type& other)
{]b4_parse_assert_if([
YYASSERT (yytypeid_);
YYASSERT (*yytypeid_ == *other.yytypeid_);])[
std::swap (as (), other.as ());
}
/// Move the content of \a other to this.
///
/// Destroys \a other.
template
void
move (self_type& other)
{
build ();
swap (other);
other.destroy ();
}
/// Copy the content of \a other to this.
template
void
copy (const self_type& other)
{
build (other.as ());
}
/// Destroy the stored \a T.
template
void
destroy ()
{
as ().~T ();]b4_parse_assert_if([
yytypeid_ = YY_NULLPTR;])[
}
private:
/// Prohibit blind copies.
self_type& operator=(const self_type&);
variant (const self_type&);
/// Accessor to raw memory as \a T.
template
T*
yyas_ ()
{
void *yyp = yybuffer_.yyraw;
return static_cast (yyp);
}
/// Const accessor to raw memory as \a T.
template
const T*
yyas_ () const
{
const void *yyp = yybuffer_.yyraw;
return static_cast (yyp);
}
union
{
/// Strongest alignment constraints.
long double yyalign_me;
/// A buffer large enough to store any of the semantic values.
char yyraw[S];
} yybuffer_;]b4_parse_assert_if([
/// Whether the content is built: if defined, the name of the stored type.
const std::type_info *yytypeid_;])[
};
]])
## -------------------------- ##
## Adjustments for variants. ##
## -------------------------- ##
# b4_value_type_declare
# ---------------------
# Declare semantic_type.
m4_define([b4_value_type_declare],
[[ /// An auxiliary type to compute the largest semantic type.
union union_type
{]b4_type_foreach([b4_char_sizeof])[};
/// Symbol semantic values.
typedef variant semantic_type;][]dnl
])
# How the semantic value is extracted when using variants.
# b4_symbol_value(VAL, [TYPE])
# ----------------------------
m4_define([b4_symbol_value],
[m4_ifval([$2],
[$1.as< $2 > ()],
[$1])])
# b4_symbol_value_template(VAL, [TYPE])
# -------------------------------------
# Same as b4_symbol_value, but used in a template method.
m4_define([b4_symbol_value_template],
[m4_ifval([$2],
[$1.template as< $2 > ()],
[$1])])
## ------------- ##
## make_SYMBOL. ##
## ------------- ##
# b4_symbol_constructor_declare_(SYMBOL-NUMBER)
# ---------------------------------------------
# Declare the overloaded version of make_symbol for the (common) type of
# these SYMBOL-NUMBERS. Use at class-level.
m4_define([b4_symbol_constructor_declare_],
[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
[ static inline
symbol_type
make_[]b4_symbol_([$1], [id]) (dnl
b4_join(b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])));
])])])
# b4_symbol_constructor_declare
# -----------------------------
# Declare symbol constructors for all the value types.
# Use at class-level.
m4_define([b4_symbol_constructor_declare],
[ // Symbol constructors declarations.
b4_symbol_foreach([b4_symbol_constructor_declare_])])
# b4_symbol_constructor_define_(SYMBOL-NUMBER)
# --------------------------------------------
# Define symbol constructor for this SYMBOL-NUMBER.
m4_define([b4_symbol_constructor_define_],
[b4_symbol_if([$1], [is_token], [b4_symbol_if([$1], [has_id],
[ b4_parser_class_name::symbol_type
b4_parser_class_name::make_[]b4_symbol_([$1], [id]) (dnl
b4_join(b4_symbol_if([$1], [has_type],
[const b4_symbol([$1], [type])& v]),
b4_locations_if([const location_type& l])))
{
return symbol_type (b4_join([token::b4_symbol([$1], [id])],
b4_symbol_if([$1], [has_type], [v]),
b4_locations_if([l])));
}
])])])
# b4_basic_symbol_constructor_declare
# -----------------------------------
# Generate a constructor declaration for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_declare],
[[
basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], const b4_symbol([$1], [type])[ v]),
b4_locations_if([const location_type& l]))[);
]])
# b4_basic_symbol_constructor_define
# ----------------------------------
# Generate a constructor implementation for basic_symbol from given type.
m4_define([b4_basic_symbol_constructor_define],
[[
template
]b4_parser_class_name[::basic_symbol::basic_symbol (]b4_join(
[typename Base::kind_type t],
b4_symbol_if([$1], [has_type], const b4_symbol([$1], [type])[ v]),
b4_locations_if([const location_type& l]))[)
: Base (t)
, value (]b4_symbol_if([$1], [has_type], [v])[)]b4_locations_if([
, location (l)])[
{}
]])
# b4_symbol_constructor_define
# ----------------------------
# Define the overloaded versions of make_symbol for all the value types.
m4_define([b4_symbol_constructor_define],
[ // Implementation of make_symbol for each symbol type.
b4_symbol_foreach([b4_symbol_constructor_define_])])
PK lCiZGJ GJ glr.cnu [ -*- C -*-
# GLR skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
# If we are loaded by glr.cc, do not override c++.m4 definitions by
# those of c.m4.
m4_if(b4_skeleton, ["glr.c"],
[m4_include(b4_pkgdatadir/[c.m4])])
## ---------------- ##
## Default values. ##
## ---------------- ##
# Stack parameters.
m4_define_default([b4_stack_depth_max], [10000])
m4_define_default([b4_stack_depth_init], [200])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
b4_define_flag_if([pure])
# If glr.cc is including this file and thus has already set b4_pure_flag,
# do not change the value of b4_pure_flag, and do not record a use of api.pure.
m4_ifndef([b4_pure_flag],
[b4_percent_define_default([[api.pure]], [[false]])
m4_define([b4_pure_flag],
[b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])])
# b4_user_formals
# ---------------
# The possible parse-params formal arguments preceded by a comma.
#
# This is not shared with yacc.c in c.m4 because GLR relies on ISO C
# formal argument declarations.
m4_define([b4_user_formals],
[m4_ifset([b4_parse_param], [, b4_formals(b4_parse_param)])])
# b4_yyerror_args
# ---------------
# Optional effective arguments passed to yyerror: user args plus yylloc, and
# a trailing comma.
m4_define([b4_yyerror_args],
[b4_pure_if([b4_locations_if([yylocp, ])])dnl
m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
# b4_lyyerror_args
# ----------------
# Same as above, but on the lookahead, hence &yylloc instead of yylocp.
m4_define([b4_lyyerror_args],
[b4_pure_if([b4_locations_if([&yylloc, ])])dnl
m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])])
# b4_pure_args
# ------------
# Same as b4_yyerror_args, but with a leading comma.
m4_define([b4_pure_args],
[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args])
# b4_lpure_args
# -------------
# Same as above, but on the lookahead, hence &yylloc instead of yylocp.
m4_define([b4_lpure_args],
[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args])
# b4_pure_formals
# ---------------
# Arguments passed to yyerror: user formals plus yylocp with leading comma.
m4_define([b4_pure_formals],
[b4_pure_if([b4_locations_if([, YYLTYPE *yylocp])])[]b4_user_formals])
# b4_locuser_formals(LOC = yylocp)
# --------------------------------
m4_define([b4_locuser_formals],
[b4_locations_if([, YYLTYPE *m4_default([$1], [yylocp])])[]b4_user_formals])
# b4_locuser_args(LOC = yylocp)
# -----------------------------
m4_define([b4_locuser_args],
[b4_locations_if([, m4_default([$1], [yylocp])])[]b4_user_args])
## ----------------- ##
## Semantic Values. ##
## ----------------- ##
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $$.
m4_define([b4_lhs_value],
[b4_symbol_value([(*yyvalp)], [$1])])
# b4_rhs_data(RULE-LENGTH, NUM)
# -----------------------------
# Expand to the semantic stack place that contains value and location
# of symbol number NUM in a rule of length RULE-LENGTH.
m4_define([b4_rhs_data],
[((yyGLRStackItem const *)yyvsp)@{YYFILL (b4_subtract([$2], [$1]))@}.yystate])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])])
## ----------- ##
## Locations. ##
## ----------- ##
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[(*yylocp)])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[(b4_rhs_data([$1], [$2]).yyloc)])
## -------------- ##
## Declarations. ##
## -------------- ##
# b4_shared_declarations
# ----------------------
# Declaration that might either go into the header (if --defines)
# or open coded in the parser body. glr.cc has its own definition.
m4_if(b4_skeleton, ["glr.c"],
[m4_define([b4_shared_declarations],
[b4_declare_yydebug[
]b4_percent_code_get([[requires]])[
]b4_token_enums[
]b4_declare_yylstype[
]b4_function_declare(b4_prefix[parse], [int], b4_parse_param)[
]b4_percent_code_get([[provides]])[]dnl
])
])
## -------------- ##
## Output files. ##
## -------------- ##
# Unfortunately the order of generation between the header and the
# implementation file matters (for glr.c) because of the current
# implementation of api.value.type=union. In that case we still use a
# union for YYSTYPE, but we generate the contents of this union when
# setting up YYSTYPE. This is needed for other aspects, such as
# defining yy_symbol_value_print, since we need to now the name of the
# members of this union.
#
# To avoid this issue, just generate the header before the
# implementation file. But we should also make them more independant.
# ----------------- #
# The header file. #
# ----------------- #
# glr.cc produces its own header.
m4_if(b4_skeleton, ["glr.c"],
[b4_defines_if(
[b4_output_begin([b4_spec_defines_file])
b4_copyright([Skeleton interface for Bison GLR parsers in C],
[2002-2015])[
]b4_cpp_guard_open([b4_spec_defines_file])[
]b4_shared_declarations[
]b4_cpp_guard_close([b4_spec_defines_file])[
]b4_output_end()
])])
# ------------------------- #
# The implementation file. #
# ------------------------- #
b4_output_begin([b4_parser_file_name])
b4_copyright([Skeleton implementation for Bison GLR parsers in C],
[2002-2015])[
/* C GLR parser skeleton written by Paul Hilfinger. */
]b4_identification
b4_percent_code_get([[top]])[
]m4_if(b4_api_prefix, [yy], [],
[[/* Substitute the type names. */
#define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[
#define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[
]m4_if(b4_prefix, [yy], [],
[[/* Substitute the variable and function names. */
#define yyparse ]b4_prefix[parse
#define yylex ]b4_prefix[lex
#define yyerror ]b4_prefix[error
#define yydebug ]b4_prefix[debug
]]b4_pure_if([], [[
#define yylval ]b4_prefix[lval
#define yychar ]b4_prefix[char
#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
#define yylloc ]b4_prefix[lloc]])]))[
/* First part of user declarations. */
]b4_user_pre_prologue[
]b4_null_define[
]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]],
[b4_shared_declarations])[
/* Enabling verbose error messages. */
#ifdef YYERROR_VERBOSE
# undef YYERROR_VERBOSE
# define YYERROR_VERBOSE 1
#else
# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[
#endif
/* Default (constant) value used for initialization for null
right-hand sides. Unlike the standard yacc.c template, here we set
the default value of $$ to a zeroed-out value. Since the default
value is undefined, this behavior is technically correct. */
static YYSTYPE yyval_default;]b4_locations_if([[
static YYLTYPE yyloc_default][]b4_yyloc_default;])[
/* Copy the second part of user declarations. */
]b4_user_post_prologue
b4_percent_code_get[]dnl
[#include
#include
#include
#ifndef YY_
# if defined YYENABLE_NLS && YYENABLE_NLS
# if ENABLE_NLS
# include /* INFRINGES ON USER NAME SPACE */
# define YY_(Msgid) dgettext ("bison-runtime", Msgid)
# endif
# endif
# ifndef YY_
# define YY_(Msgid) Msgid
# endif
#endif
#ifndef YYFREE
# define YYFREE free
#endif
#ifndef YYMALLOC
# define YYMALLOC malloc
#endif
#ifndef YYREALLOC
# define YYREALLOC realloc
#endif
#define YYSIZEMAX ((size_t) -1)
#ifdef __cplusplus
typedef bool yybool;
#else
typedef unsigned char yybool;
#endif
#define yytrue 1
#define yyfalse 0
#ifndef YYSETJMP
# include
# define YYJMP_BUF jmp_buf
# define YYSETJMP(Env) setjmp (Env)
/* Pacify clang. */
# define YYLONGJMP(Env, Val) (longjmp (Env, Val), YYASSERT (0))
#endif
]b4_attribute_define[
#ifndef YYASSERT
# define YYASSERT(Condition) ((void) ((Condition) || (abort (), 0)))
#endif
/* YYFINAL -- State number of the termination state. */
#define YYFINAL ]b4_final_state_number[
/* YYLAST -- Last index in YYTABLE. */
#define YYLAST ]b4_last[
/* YYNTOKENS -- Number of terminals. */
#define YYNTOKENS ]b4_tokens_number[
/* YYNNTS -- Number of nonterminals. */
#define YYNNTS ]b4_nterms_number[
/* YYNRULES -- Number of rules. */
#define YYNRULES ]b4_rules_number[
/* YYNRULES -- Number of states. */
#define YYNSTATES ]b4_states_number[
/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */
#define YYMAXRHS ]b4_r2_max[
/* YYMAXLEFT -- Maximum number of symbols to the left of a handle
accessed by $0, $-1, etc., in any rule. */
#define YYMAXLEFT ]b4_max_left_semantic_context[
/* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */
#define YYUNDEFTOK ]b4_undef_token_number[
#define YYMAXUTOK ]b4_user_token_number_max[
#define YYTRANSLATE(YYX) \
((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */
static const ]b4_int_type_for([b4_translate])[ yytranslate[] =
{
]b4_translate[
};
#if ]b4_api_PREFIX[DEBUG
/* YYRLINE[YYN] -- source line where rule number YYN was defined. */
static const ]b4_int_type_for([b4_rline])[ yyrline[] =
{
]b4_rline[
};
#endif
#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[
/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
First, the terminals, then, starting at YYNTOKENS, nonterminals. */
static const char *const yytname[] =
{
]b4_tname[
};
#endif
#define YYPACT_NINF ]b4_pact_ninf[
#define YYTABLE_NINF ]b4_table_ninf[
]b4_parser_tables_define[
/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */
static const ]b4_int_type_for([b4_dprec])[ yydprec[] =
{
]b4_dprec[
};
/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */
static const ]b4_int_type_for([b4_merger])[ yymerger[] =
{
]b4_merger[
};
/* YYIMMEDIATE[RULE-NUM] -- True iff rule #RULE-NUM is not to be deferred, as
in the case of predicates. */
static const yybool yyimmediate[] =
{
]b4_immediate[
};
/* YYCONFLP[YYPACT[STATE-NUM]] -- Pointer into YYCONFL of start of
list of conflicting reductions corresponding to action entry for
state STATE-NUM in yytable. 0 means no conflicts. The list in
yyconfl is terminated by a rule number of 0. */
static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] =
{
]b4_conflict_list_heads[
};
/* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by
0, pointed into by YYCONFLP. */
]dnl Do not use b4_int_type_for here, since there are places where
dnl pointers onto yyconfl are taken, whose type is "short int *".
dnl We probably ought to introduce a type for confl.
[static const short int yyconfl[] =
{
]b4_conflicting_rules[
};
/* Error token number */
#define YYTERROR 1
]b4_locations_if([[
]b4_yylloc_default_define[
# define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc)
]])[
]b4_pure_if(
[
#undef yynerrs
#define yynerrs (yystackp->yyerrcnt)
#undef yychar
#define yychar (yystackp->yyrawchar)
#undef yylval
#define yylval (yystackp->yyval)
#undef yylloc
#define yylloc (yystackp->yyloc)
m4_if(b4_prefix[], [yy], [],
[#define b4_prefix[]nerrs yynerrs
#define b4_prefix[]char yychar
#define b4_prefix[]lval yylval
#define b4_prefix[]lloc yylloc])],
[YYSTYPE yylval;]b4_locations_if([[
YYLTYPE yylloc;]])[
int yynerrs;
int yychar;])[
static const int YYEOF = 0;
static const int YYEMPTY = -2;
typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG;
#define YYCHK(YYE) \
do { \
YYRESULTTAG yychk_flag = YYE; \
if (yychk_flag != yyok) \
return yychk_flag; \
} while (0)
#if ]b4_api_PREFIX[DEBUG
# ifndef YYFPRINTF
# define YYFPRINTF fprintf
# endif
]b4_yy_location_print_define[
# define YYDPRINTF(Args) \
do { \
if (yydebug) \
YYFPRINTF Args; \
} while (0)
]b4_yy_symbol_print_define[
# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \
do { \
if (yydebug) \
{ \
YYFPRINTF (stderr, "%s ", Title); \
yy_symbol_print (stderr, Type, Value]b4_locuser_args([Location])[); \
YYFPRINTF (stderr, "\n"); \
} \
} while (0)
/* Nonzero means print parse trace. It is left uninitialized so that
multiple parsers can coexist. */
int yydebug;
struct yyGLRStack;
static void yypstack (struct yyGLRStack* yystackp, size_t yyk)
YY_ATTRIBUTE_UNUSED;
static void yypdumpstack (struct yyGLRStack* yystackp)
YY_ATTRIBUTE_UNUSED;
#else /* !]b4_api_PREFIX[DEBUG */
# define YYDPRINTF(Args)
# define YY_SYMBOL_PRINT(Title, Type, Value, Location)
#endif /* !]b4_api_PREFIX[DEBUG */
/* YYINITDEPTH -- initial size of the parser's stacks. */
#ifndef YYINITDEPTH
# define YYINITDEPTH ]b4_stack_depth_init[
#endif
/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
if the built-in stack extension method is used).
Do not make this value too large; the results are undefined if
SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem)
evaluated with infinite-precision integer arithmetic. */
#ifndef YYMAXDEPTH
# define YYMAXDEPTH ]b4_stack_depth_max[
#endif
/* Minimum number of free items on the stack allowed after an
allocation. This is to allow allocation and initialization
to be completed by functions that call yyexpandGLRStack before the
stack is expanded, thus insuring that all necessary pointers get
properly redirected to new data. */
#define YYHEADROOM 2
#ifndef YYSTACKEXPANDABLE
# define YYSTACKEXPANDABLE 1
#endif
#if YYSTACKEXPANDABLE
# define YY_RESERVE_GLRSTACK(Yystack) \
do { \
if (Yystack->yyspaceLeft < YYHEADROOM) \
yyexpandGLRStack (Yystack); \
} while (0)
#else
# define YY_RESERVE_GLRSTACK(Yystack) \
do { \
if (Yystack->yyspaceLeft < YYHEADROOM) \
yyMemoryExhausted (Yystack); \
} while (0)
#endif
#if YYERROR_VERBOSE
# ifndef yystpcpy
# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE
# define yystpcpy stpcpy
# else
/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
YYDEST. */
static char *
yystpcpy (char *yydest, const char *yysrc)
{
char *yyd = yydest;
const char *yys = yysrc;
while ((*yyd++ = *yys++) != '\0')
continue;
return yyd - 1;
}
# endif
# endif
# ifndef yytnamerr
/* Copy to YYRES the contents of YYSTR after stripping away unnecessary
quotes and backslashes, so that it's suitable for yyerror. The
heuristic is that double-quoting is unnecessary unless the string
contains an apostrophe, a comma, or backslash (other than
backslash-backslash). YYSTR is taken from yytname. If YYRES is
null, do not copy; instead, return the length of what the result
would have been. */
static size_t
yytnamerr (char *yyres, const char *yystr)
{
if (*yystr == '"')
{
size_t yyn = 0;
char const *yyp = yystr;
for (;;)
switch (*++yyp)
{
case '\'':
case ',':
goto do_not_strip_quotes;
case '\\':
if (*++yyp != '\\')
goto do_not_strip_quotes;
/* Fall through. */
default:
if (yyres)
yyres[yyn] = *yyp;
yyn++;
break;
case '"':
if (yyres)
yyres[yyn] = '\0';
return yyn;
}
do_not_strip_quotes: ;
}
if (! yyres)
return strlen (yystr);
return yystpcpy (yyres, yystr) - yyres;
}
# endif
#endif /* !YYERROR_VERBOSE */
/** State numbers, as in LALR(1) machine */
typedef int yyStateNum;
/** Rule numbers, as in LALR(1) machine */
typedef int yyRuleNum;
/** Grammar symbol */
typedef int yySymbol;
/** Item references, as in LALR(1) machine */
typedef short int yyItemNum;
typedef struct yyGLRState yyGLRState;
typedef struct yyGLRStateSet yyGLRStateSet;
typedef struct yySemanticOption yySemanticOption;
typedef union yyGLRStackItem yyGLRStackItem;
typedef struct yyGLRStack yyGLRStack;
struct yyGLRState {
/** Type tag: always true. */
yybool yyisState;
/** Type tag for yysemantics. If true, yysval applies, otherwise
* yyfirstVal applies. */
yybool yyresolved;
/** Number of corresponding LALR(1) machine state. */
yyStateNum yylrState;
/** Preceding state in this stack */
yyGLRState* yypred;
/** Source position of the last token produced by my symbol */
size_t yyposn;
union {
/** First in a chain of alternative reductions producing the
* non-terminal corresponding to this state, threaded through
* yynext. */
yySemanticOption* yyfirstVal;
/** Semantic value for this state. */
YYSTYPE yysval;
} yysemantics;]b4_locations_if([[
/** Source location for this state. */
YYLTYPE yyloc;]])[
};
struct yyGLRStateSet {
yyGLRState** yystates;
/** During nondeterministic operation, yylookaheadNeeds tracks which
* stacks have actually needed the current lookahead. During deterministic
* operation, yylookaheadNeeds[0] is not maintained since it would merely
* duplicate yychar != YYEMPTY. */
yybool* yylookaheadNeeds;
size_t yysize, yycapacity;
};
struct yySemanticOption {
/** Type tag: always false. */
yybool yyisState;
/** Rule number for this reduction */
yyRuleNum yyrule;
/** The last RHS state in the list of states to be reduced. */
yyGLRState* yystate;
/** The lookahead for this reduction. */
int yyrawchar;
YYSTYPE yyval;]b4_locations_if([[
YYLTYPE yyloc;]])[
/** Next sibling in chain of options. To facilitate merging,
* options are chained in decreasing order by address. */
yySemanticOption* yynext;
};
/** Type of the items in the GLR stack. The yyisState field
* indicates which item of the union is valid. */
union yyGLRStackItem {
yyGLRState yystate;
yySemanticOption yyoption;
};
struct yyGLRStack {
int yyerrState;
]b4_locations_if([[ /* To compute the location of the error token. */
yyGLRStackItem yyerror_range[3];]])[
]b4_pure_if(
[
int yyerrcnt;
int yyrawchar;
YYSTYPE yyval;]b4_locations_if([[
YYLTYPE yyloc;]])[
])[
YYJMP_BUF yyexception_buffer;
yyGLRStackItem* yyitems;
yyGLRStackItem* yynextFree;
size_t yyspaceLeft;
yyGLRState* yysplitPoint;
yyGLRState* yylastDeleted;
yyGLRStateSet yytops;
};
#if YYSTACKEXPANDABLE
static void yyexpandGLRStack (yyGLRStack* yystackp);
#endif
static _Noreturn void
yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg)
{
if (yymsg != YY_NULLPTR)
yyerror (]b4_yyerror_args[yymsg);
YYLONGJMP (yystackp->yyexception_buffer, 1);
}
static _Noreturn void
yyMemoryExhausted (yyGLRStack* yystackp)
{
YYLONGJMP (yystackp->yyexception_buffer, 2);
}
#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE
/** A printable representation of TOKEN. */
static inline const char*
yytokenName (yySymbol yytoken)
{
if (yytoken == YYEMPTY)
return "";
return yytname[yytoken];
}
#endif
/** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting
* at YYVSP[YYLOW0].yystate.yypred. Leaves YYVSP[YYLOW1].yystate.yypred
* containing the pointer to the next state in the chain. */
static void yyfillin (yyGLRStackItem *, int, int) YY_ATTRIBUTE_UNUSED;
static void
yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1)
{
int i;
yyGLRState *s = yyvsp[yylow0].yystate.yypred;
for (i = yylow0-1; i >= yylow1; i -= 1)
{
#if ]b4_api_PREFIX[DEBUG
yyvsp[i].yystate.yylrState = s->yylrState;
#endif
yyvsp[i].yystate.yyresolved = s->yyresolved;
if (s->yyresolved)
yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;
else
/* The effect of using yysval or yyloc (in an immediate rule) is
* undefined. */
yyvsp[i].yystate.yysemantics.yyfirstVal = YY_NULLPTR;]b4_locations_if([[
yyvsp[i].yystate.yyloc = s->yyloc;]])[
s = yyvsp[i].yystate.yypred = s->yypred;
}
}
/* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1. Otherwise, fill in
* YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1.
* For convenience, always return YYLOW1. */
static inline int yyfill (yyGLRStackItem *, int *, int, yybool)
YY_ATTRIBUTE_UNUSED;
static inline int
yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal)
{
if (!yynormal && yylow1 < *yylow)
{
yyfillin (yyvsp, *yylow, yylow1);
*yylow = yylow1;
}
return yylow1;
}
/** Perform user action for rule number YYN, with RHS length YYRHSLEN,
* and top stack item YYVSP. YYLVALP points to place to put semantic
* value ($$), and yylocp points to place for location information
* (@@$). Returns yyok for normal return, yyaccept for YYACCEPT,
* yyerr for YYERROR, yyabort for YYABORT. */
static YYRESULTTAG
yyuserAction (yyRuleNum yyn, size_t yyrhslen, yyGLRStackItem* yyvsp,
yyGLRStack* yystackp,
YYSTYPE* yyvalp]b4_locuser_formals[)
{
yybool yynormal YY_ATTRIBUTE_UNUSED = (yystackp->yysplitPoint == YY_NULLPTR);
int yylow;
]b4_parse_param_use([yyvalp], [yylocp])dnl
[ YYUSE (yyrhslen);
# undef yyerrok
# define yyerrok (yystackp->yyerrState = 0)
# undef YYACCEPT
# define YYACCEPT return yyaccept
# undef YYABORT
# define YYABORT return yyabort
# undef YYERROR
# define YYERROR return yyerrok, yyerr
# undef YYRECOVERING
# define YYRECOVERING() (yystackp->yyerrState != 0)
# undef yyclearin
# define yyclearin (yychar = YYEMPTY)
# undef YYFILL
# define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal)
# undef YYBACKUP
# define YYBACKUP(Token, Value) \
return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")), \
yyerrok, yyerr
yylow = 1;
if (yyrhslen == 0)
*yyvalp = yyval_default;
else
*yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;]b4_locations_if([[
YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen);
yystackp->yyerror_range[1].yystate.yyloc = *yylocp;
]])[
switch (yyn)
{
]b4_user_actions[
default: break;
}
return yyok;
# undef yyerrok
# undef YYABORT
# undef YYACCEPT
# undef YYERROR
# undef YYBACKUP
# undef yyclearin
# undef YYRECOVERING
}
static void
yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1)
{
YYUSE (yy0);
YYUSE (yy1);
switch (yyn)
{
]b4_mergers[
default: break;
}
}
/* Bison grammar-table manipulation. */
]b4_yydestruct_define[
/** Number of symbols composing the right hand side of rule #RULE. */
static inline int
yyrhsLength (yyRuleNum yyrule)
{
return yyr2[yyrule];
}
static void
yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[)
{
if (yys->yyresolved)
yydestruct (yymsg, yystos[yys->yylrState],
&yys->yysemantics.yysval]b4_locuser_args([&yys->yyloc])[);
else
{
#if ]b4_api_PREFIX[DEBUG
if (yydebug)
{
if (yys->yysemantics.yyfirstVal)
YYFPRINTF (stderr, "%s unresolved", yymsg);
else
YYFPRINTF (stderr, "%s incomplete", yymsg);
YY_SYMBOL_PRINT ("", yystos[yys->yylrState], YY_NULLPTR, &yys->yyloc);
}
#endif
if (yys->yysemantics.yyfirstVal)
{
yySemanticOption *yyoption = yys->yysemantics.yyfirstVal;
yyGLRState *yyrh;
int yyn;
for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule);
yyn > 0;
yyrh = yyrh->yypred, yyn -= 1)
yydestroyGLRState (yymsg, yyrh]b4_user_args[);
}
}
}
/** Left-hand-side symbol for rule #YYRULE. */
static inline yySymbol
yylhsNonterm (yyRuleNum yyrule)
{
return yyr1[yyrule];
}
#define yypact_value_is_default(Yystate) \
]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[
/** True iff LR state YYSTATE has only a default reduction (regardless
* of token). */
static inline yybool
yyisDefaultedState (yyStateNum yystate)
{
return yypact_value_is_default (yypact[yystate]);
}
/** The default reduction for YYSTATE, assuming it has one. */
static inline yyRuleNum
yydefaultAction (yyStateNum yystate)
{
return yydefact[yystate];
}
#define yytable_value_is_error(Yytable_value) \
]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[
/** Set *YYACTION to the action to take in YYSTATE on seeing YYTOKEN.
* Result R means
* R < 0: Reduce on rule -R.
* R = 0: Error.
* R > 0: Shift to state R.
* Set *YYCONFLICTS to a pointer into yyconfl to a 0-terminated list
* of conflicting reductions.
*/
static inline void
yygetLRActions (yyStateNum yystate, int yytoken,
int* yyaction, const short int** yyconflicts)
{
int yyindex = yypact[yystate] + yytoken;
if (yypact_value_is_default (yypact[yystate])
|| yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken)
{
*yyaction = -yydefact[yystate];
*yyconflicts = yyconfl;
}
else if (! yytable_value_is_error (yytable[yyindex]))
{
*yyaction = yytable[yyindex];
*yyconflicts = yyconfl + yyconflp[yyindex];
}
else
{
*yyaction = 0;
*yyconflicts = yyconfl + yyconflp[yyindex];
}
}
/** Compute post-reduction state.
* \param yystate the current state
* \param yysym the nonterminal to push on the stack
*/
static inline yyStateNum
yyLRgotoState (yyStateNum yystate, yySymbol yysym)
{
int yyr = yypgoto[yysym - YYNTOKENS] + yystate;
if (0 <= yyr && yyr <= YYLAST && yycheck[yyr] == yystate)
return yytable[yyr];
else
return yydefgoto[yysym - YYNTOKENS];
}
static inline yybool
yyisShiftAction (int yyaction)
{
return 0 < yyaction;
}
static inline yybool
yyisErrorAction (int yyaction)
{
return yyaction == 0;
}
/* GLRStates */
/** Return a fresh GLRStackItem in YYSTACKP. The item is an LR state
* if YYISSTATE, and otherwise a semantic option. Callers should call
* YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient
* headroom. */
static inline yyGLRStackItem*
yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState)
{
yyGLRStackItem* yynewItem = yystackp->yynextFree;
yystackp->yyspaceLeft -= 1;
yystackp->yynextFree += 1;
yynewItem->yystate.yyisState = yyisState;
return yynewItem;
}
/** Add a new semantic action that will execute the action for rule
* YYRULE on the semantic values in YYRHS to the list of
* alternative actions for YYSTATE. Assumes that YYRHS comes from
* stack #YYK of *YYSTACKP. */
static void
yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate,
yyGLRState* yyrhs, yyRuleNum yyrule)
{
yySemanticOption* yynewOption =
&yynewGLRStackItem (yystackp, yyfalse)->yyoption;
YYASSERT (!yynewOption->yyisState);
yynewOption->yystate = yyrhs;
yynewOption->yyrule = yyrule;
if (yystackp->yytops.yylookaheadNeeds[yyk])
{
yynewOption->yyrawchar = yychar;
yynewOption->yyval = yylval;]b4_locations_if([
yynewOption->yyloc = yylloc;])[
}
else
yynewOption->yyrawchar = YYEMPTY;
yynewOption->yynext = yystate->yysemantics.yyfirstVal;
yystate->yysemantics.yyfirstVal = yynewOption;
YY_RESERVE_GLRSTACK (yystackp);
}
/* GLRStacks */
/** Initialize YYSET to a singleton set containing an empty stack. */
static yybool
yyinitStateSet (yyGLRStateSet* yyset)
{
yyset->yysize = 1;
yyset->yycapacity = 16;
yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]);
if (! yyset->yystates)
return yyfalse;
yyset->yystates[0] = YY_NULLPTR;
yyset->yylookaheadNeeds =
(yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]);
if (! yyset->yylookaheadNeeds)
{
YYFREE (yyset->yystates);
return yyfalse;
}
return yytrue;
}
static void yyfreeStateSet (yyGLRStateSet* yyset)
{
YYFREE (yyset->yystates);
YYFREE (yyset->yylookaheadNeeds);
}
/** Initialize *YYSTACKP to a single empty stack, with total maximum
* capacity for all stacks of YYSIZE. */
static yybool
yyinitGLRStack (yyGLRStack* yystackp, size_t yysize)
{
yystackp->yyerrState = 0;
yynerrs = 0;
yystackp->yyspaceLeft = yysize;
yystackp->yyitems =
(yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]);
if (!yystackp->yyitems)
return yyfalse;
yystackp->yynextFree = yystackp->yyitems;
yystackp->yysplitPoint = YY_NULLPTR;
yystackp->yylastDeleted = YY_NULLPTR;
return yyinitStateSet (&yystackp->yytops);
}
#if YYSTACKEXPANDABLE
# define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \
&((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE
/** If *YYSTACKP is expandable, extend it. WARNING: Pointers into the
stack from outside should be considered invalid after this call.
We always expand when there are 1 or fewer items left AFTER an
allocation, so that we can avoid having external pointers exist
across an allocation. */
static void
yyexpandGLRStack (yyGLRStack* yystackp)
{
yyGLRStackItem* yynewItems;
yyGLRStackItem* yyp0, *yyp1;
size_t yynewSize;
size_t yyn;
size_t yysize = yystackp->yynextFree - yystackp->yyitems;
if (YYMAXDEPTH - YYHEADROOM < yysize)
yyMemoryExhausted (yystackp);
yynewSize = 2*yysize;
if (YYMAXDEPTH < yynewSize)
yynewSize = YYMAXDEPTH;
yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]);
if (! yynewItems)
yyMemoryExhausted (yystackp);
for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize;
0 < yyn;
yyn -= 1, yyp0 += 1, yyp1 += 1)
{
*yyp1 = *yyp0;
if (*(yybool *) yyp0)
{
yyGLRState* yys0 = &yyp0->yystate;
yyGLRState* yys1 = &yyp1->yystate;
if (yys0->yypred != YY_NULLPTR)
yys1->yypred =
YYRELOC (yyp0, yyp1, yys0->yypred, yystate);
if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULLPTR)
yys1->yysemantics.yyfirstVal =
YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption);
}
else
{
yySemanticOption* yyv0 = &yyp0->yyoption;
yySemanticOption* yyv1 = &yyp1->yyoption;
if (yyv0->yystate != YY_NULLPTR)
yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate);
if (yyv0->yynext != YY_NULLPTR)
yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption);
}
}
if (yystackp->yysplitPoint != YY_NULLPTR)
yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems,
yystackp->yysplitPoint, yystate);
for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1)
if (yystackp->yytops.yystates[yyn] != YY_NULLPTR)
yystackp->yytops.yystates[yyn] =
YYRELOC (yystackp->yyitems, yynewItems,
yystackp->yytops.yystates[yyn], yystate);
YYFREE (yystackp->yyitems);
yystackp->yyitems = yynewItems;
yystackp->yynextFree = yynewItems + yysize;
yystackp->yyspaceLeft = yynewSize - yysize;
}
#endif
static void
yyfreeGLRStack (yyGLRStack* yystackp)
{
YYFREE (yystackp->yyitems);
yyfreeStateSet (&yystackp->yytops);
}
/** Assuming that YYS is a GLRState somewhere on *YYSTACKP, update the
* splitpoint of *YYSTACKP, if needed, so that it is at least as deep as
* YYS. */
static inline void
yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys)
{
if (yystackp->yysplitPoint != YY_NULLPTR && yystackp->yysplitPoint > yys)
yystackp->yysplitPoint = yys;
}
/** Invalidate stack #YYK in *YYSTACKP. */
static inline void
yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk)
{
if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
yystackp->yylastDeleted = yystackp->yytops.yystates[yyk];
yystackp->yytops.yystates[yyk] = YY_NULLPTR;
}
/** Undelete the last stack in *YYSTACKP that was marked as deleted. Can
only be done once after a deletion, and only when all other stacks have
been deleted. */
static void
yyundeleteLastStack (yyGLRStack* yystackp)
{
if (yystackp->yylastDeleted == YY_NULLPTR || yystackp->yytops.yysize != 0)
return;
yystackp->yytops.yystates[0] = yystackp->yylastDeleted;
yystackp->yytops.yysize = 1;
YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n"));
yystackp->yylastDeleted = YY_NULLPTR;
}
static inline void
yyremoveDeletes (yyGLRStack* yystackp)
{
size_t yyi, yyj;
yyi = yyj = 0;
while (yyj < yystackp->yytops.yysize)
{
if (yystackp->yytops.yystates[yyi] == YY_NULLPTR)
{
if (yyi == yyj)
{
YYDPRINTF ((stderr, "Removing dead stacks.\n"));
}
yystackp->yytops.yysize -= 1;
}
else
{
yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi];
/* In the current implementation, it's unnecessary to copy
yystackp->yytops.yylookaheadNeeds[yyi] since, after
yyremoveDeletes returns, the parser immediately either enters
deterministic operation or shifts a token. However, it doesn't
hurt, and the code might evolve to need it. */
yystackp->yytops.yylookaheadNeeds[yyj] =
yystackp->yytops.yylookaheadNeeds[yyi];
if (yyj != yyi)
{
YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n",
(unsigned long int) yyi, (unsigned long int) yyj));
}
yyj += 1;
}
yyi += 1;
}
}
/** Shift to a new state on stack #YYK of *YYSTACKP, corresponding to LR
* state YYLRSTATE, at input position YYPOSN, with (resolved) semantic
* value *YYVALP and source location *YYLOCP. */
static inline void
yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
size_t yyposn,
YYSTYPE* yyvalp]b4_locations_if([, YYLTYPE* yylocp])[)
{
yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
yynewState->yylrState = yylrState;
yynewState->yyposn = yyposn;
yynewState->yyresolved = yytrue;
yynewState->yypred = yystackp->yytops.yystates[yyk];
yynewState->yysemantics.yysval = *yyvalp;]b4_locations_if([
yynewState->yyloc = *yylocp;])[
yystackp->yytops.yystates[yyk] = yynewState;
YY_RESERVE_GLRSTACK (yystackp);
}
/** Shift stack #YYK of *YYSTACKP, to a new state corresponding to LR
* state YYLRSTATE, at input position YYPOSN, with the (unresolved)
* semantic value of YYRHS under the action for YYRULE. */
static inline void
yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState,
size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule)
{
yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate;
YYASSERT (yynewState->yyisState);
yynewState->yylrState = yylrState;
yynewState->yyposn = yyposn;
yynewState->yyresolved = yyfalse;
yynewState->yypred = yystackp->yytops.yystates[yyk];
yynewState->yysemantics.yyfirstVal = YY_NULLPTR;
yystackp->yytops.yystates[yyk] = yynewState;
/* Invokes YY_RESERVE_GLRSTACK. */
yyaddDeferredAction (yystackp, yyk, yynewState, yyrhs, yyrule);
}
#if !]b4_api_PREFIX[DEBUG
# define YY_REDUCE_PRINT(Args)
#else
# define YY_REDUCE_PRINT(Args) \
do { \
if (yydebug) \
yy_reduce_print Args; \
} while (0)
/*----------------------------------------------------------------------.
| Report that stack #YYK of *YYSTACKP is going to be reduced by YYRULE. |
`----------------------------------------------------------------------*/
static inline void
yy_reduce_print (int yynormal, yyGLRStackItem* yyvsp, size_t yyk,
yyRuleNum yyrule]b4_user_formals[)
{
int yynrhs = yyrhsLength (yyrule);]b4_locations_if([
int yylow = 1;])[
int yyi;
YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n",
(unsigned long int) yyk, yyrule - 1,
(unsigned long int) yyrline[yyrule]);
if (! yynormal)
yyfillin (yyvsp, 1, -yynrhs);
/* The symbols being reduced. */
for (yyi = 0; yyi < yynrhs; yyi++)
{
YYFPRINTF (stderr, " $%d = ", yyi + 1);
yy_symbol_print (stderr,
yystos[yyvsp[yyi - yynrhs + 1].yystate.yylrState],
&yyvsp[yyi - yynrhs + 1].yystate.yysemantics.yysval
]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl
b4_user_args[);
if (!yyvsp[yyi - yynrhs + 1].yystate.yyresolved)
YYFPRINTF (stderr, " (unresolved)");
YYFPRINTF (stderr, "\n");
}
}
#endif
/** Pop the symbols consumed by reduction #YYRULE from the top of stack
* #YYK of *YYSTACKP, and perform the appropriate semantic action on their
* semantic values. Assumes that all ambiguities in semantic values
* have been previously resolved. Set *YYVALP to the resulting value,
* and *YYLOCP to the computed location (if any). Return value is as
* for userAction. */
static inline YYRESULTTAG
yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
YYSTYPE* yyvalp]b4_locuser_formals[)
{
int yynrhs = yyrhsLength (yyrule);
if (yystackp->yysplitPoint == YY_NULLPTR)
{
/* Standard special case: single stack. */
yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk];
YYASSERT (yyk == 0);
yystackp->yynextFree -= yynrhs;
yystackp->yyspaceLeft += yynrhs;
yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate;
YY_REDUCE_PRINT ((1, yyrhs, yyk, yyrule]b4_user_args[));
return yyuserAction (yyrule, yynrhs, yyrhs, yystackp,
yyvalp]b4_locuser_args[);
}
else
{
int yyi;
yyGLRState* yys;
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred
= yystackp->yytops.yystates[yyk];]b4_locations_if([[
if (yynrhs == 0)
/* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[
for (yyi = 0; yyi < yynrhs; yyi += 1)
{
yys = yys->yypred;
YYASSERT (yys);
}
yyupdateSplit (yystackp, yys);
yystackp->yytops.yystates[yyk] = yys;
YY_REDUCE_PRINT ((0, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, yyk, yyrule]b4_user_args[));
return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
yystackp, yyvalp]b4_locuser_args[);
}
}
/** Pop items off stack #YYK of *YYSTACKP according to grammar rule YYRULE,
* and push back on the resulting nonterminal symbol. Perform the
* semantic action associated with YYRULE and store its value with the
* newly pushed state, if YYFORCEEVAL or if *YYSTACKP is currently
* unambiguous. Otherwise, store the deferred semantic action with
* the new state. If the new state would have an identical input
* position, LR state, and predecessor to an existing state on the stack,
* it is identified with that existing state, eliminating stack #YYK from
* *YYSTACKP. In this case, the semantic value is
* added to the options for the existing state's semantic value.
*/
static inline YYRESULTTAG
yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule,
yybool yyforceEval]b4_user_formals[)
{
size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn;
if (yyforceEval || yystackp->yysplitPoint == YY_NULLPTR)
{
YYSTYPE yysval;]b4_locations_if([[
YYLTYPE yyloc;]])[
YYRESULTTAG yyflag = yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[);
if (yyflag == yyerr && yystackp->yysplitPoint != YY_NULLPTR)
{
YYDPRINTF ((stderr, "Parse on stack %lu rejected by rule #%d.\n",
(unsigned long int) yyk, yyrule - 1));
}
if (yyflag != yyok)
return yyflag;
YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc);
yyglrShift (yystackp, yyk,
yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState,
yylhsNonterm (yyrule)),
yyposn, &yysval]b4_locations_if([, &yyloc])[);
}
else
{
size_t yyi;
int yyn;
yyGLRState* yys, *yys0 = yystackp->yytops.yystates[yyk];
yyStateNum yynewLRState;
for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule);
0 < yyn; yyn -= 1)
{
yys = yys->yypred;
YYASSERT (yys);
}
yyupdateSplit (yystackp, yys);
yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule));
YYDPRINTF ((stderr,
"Reduced stack %lu by rule #%d; action deferred. "
"Now in state %d.\n",
(unsigned long int) yyk, yyrule - 1, yynewLRState));
for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULLPTR)
{
yyGLRState *yysplit = yystackp->yysplitPoint;
yyGLRState *yyp = yystackp->yytops.yystates[yyi];
while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn)
{
if (yyp->yylrState == yynewLRState && yyp->yypred == yys)
{
yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule);
yymarkStackDeleted (yystackp, yyk);
YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n",
(unsigned long int) yyk,
(unsigned long int) yyi));
return yyok;
}
yyp = yyp->yypred;
}
}
yystackp->yytops.yystates[yyk] = yys;
yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule);
}
return yyok;
}
static size_t
yysplitStack (yyGLRStack* yystackp, size_t yyk)
{
if (yystackp->yysplitPoint == YY_NULLPTR)
{
YYASSERT (yyk == 0);
yystackp->yysplitPoint = yystackp->yytops.yystates[yyk];
}
if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity)
{
yyGLRState** yynewStates;
yybool* yynewLookaheadNeeds;
yynewStates = YY_NULLPTR;
if (yystackp->yytops.yycapacity
> (YYSIZEMAX / (2 * sizeof yynewStates[0])))
yyMemoryExhausted (yystackp);
yystackp->yytops.yycapacity *= 2;
yynewStates =
(yyGLRState**) YYREALLOC (yystackp->yytops.yystates,
(yystackp->yytops.yycapacity
* sizeof yynewStates[0]));
if (yynewStates == YY_NULLPTR)
yyMemoryExhausted (yystackp);
yystackp->yytops.yystates = yynewStates;
yynewLookaheadNeeds =
(yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds,
(yystackp->yytops.yycapacity
* sizeof yynewLookaheadNeeds[0]));
if (yynewLookaheadNeeds == YY_NULLPTR)
yyMemoryExhausted (yystackp);
yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds;
}
yystackp->yytops.yystates[yystackp->yytops.yysize]
= yystackp->yytops.yystates[yyk];
yystackp->yytops.yylookaheadNeeds[yystackp->yytops.yysize]
= yystackp->yytops.yylookaheadNeeds[yyk];
yystackp->yytops.yysize += 1;
return yystackp->yytops.yysize-1;
}
/** True iff YYY0 and YYY1 represent identical options at the top level.
* That is, they represent the same rule applied to RHS symbols
* that produce the same terminal symbols. */
static yybool
yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
if (yyy0->yyrule == yyy1->yyrule)
{
yyGLRState *yys0, *yys1;
int yyn;
for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
yyn = yyrhsLength (yyy0->yyrule);
yyn > 0;
yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
if (yys0->yyposn != yys1->yyposn)
return yyfalse;
return yytrue;
}
else
return yyfalse;
}
/** Assuming identicalOptions (YYY0,YYY1), destructively merge the
* alternative semantic values for the RHS-symbols of YYY1 and YYY0. */
static void
yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1)
{
yyGLRState *yys0, *yys1;
int yyn;
for (yys0 = yyy0->yystate, yys1 = yyy1->yystate,
yyn = yyrhsLength (yyy0->yyrule);
yyn > 0;
yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1)
{
if (yys0 == yys1)
break;
else if (yys0->yyresolved)
{
yys1->yyresolved = yytrue;
yys1->yysemantics.yysval = yys0->yysemantics.yysval;
}
else if (yys1->yyresolved)
{
yys0->yyresolved = yytrue;
yys0->yysemantics.yysval = yys1->yysemantics.yysval;
}
else
{
yySemanticOption** yyz0p = &yys0->yysemantics.yyfirstVal;
yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal;
while (yytrue)
{
if (yyz1 == *yyz0p || yyz1 == YY_NULLPTR)
break;
else if (*yyz0p == YY_NULLPTR)
{
*yyz0p = yyz1;
break;
}
else if (*yyz0p < yyz1)
{
yySemanticOption* yyz = *yyz0p;
*yyz0p = yyz1;
yyz1 = yyz1->yynext;
(*yyz0p)->yynext = yyz;
}
yyz0p = &(*yyz0p)->yynext;
}
yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal;
}
}
}
/** Y0 and Y1 represent two possible actions to take in a given
* parsing state; return 0 if no combination is possible,
* 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */
static int
yypreference (yySemanticOption* y0, yySemanticOption* y1)
{
yyRuleNum r0 = y0->yyrule, r1 = y1->yyrule;
int p0 = yydprec[r0], p1 = yydprec[r1];
if (p0 == p1)
{
if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1])
return 0;
else
return 1;
}
if (p0 == 0 || p1 == 0)
return 0;
if (p0 < p1)
return 3;
if (p1 < p0)
return 2;
return 0;
}
static YYRESULTTAG yyresolveValue (yyGLRState* yys,
yyGLRStack* yystackp]b4_user_formals[);
/** Resolve the previous YYN states starting at and including state YYS
* on *YYSTACKP. If result != yyok, some states may have been left
* unresolved possibly with empty semantic option chains. Regardless
* of whether result = yyok, each state has been left with consistent
* data so that yydestroyGLRState can be invoked if necessary. */
static YYRESULTTAG
yyresolveStates (yyGLRState* yys, int yyn,
yyGLRStack* yystackp]b4_user_formals[)
{
if (0 < yyn)
{
YYASSERT (yys->yypred);
YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[));
if (! yys->yyresolved)
YYCHK (yyresolveValue (yys, yystackp]b4_user_args[));
}
return yyok;
}
/** Resolve the states for the RHS of YYOPT on *YYSTACKP, perform its
* user action, and return the semantic value and location in *YYVALP
* and *YYLOCP. Regardless of whether result = yyok, all RHS states
* have been destroyed (assuming the user action destroys all RHS
* semantic values if invoked). */
static YYRESULTTAG
yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp,
YYSTYPE* yyvalp]b4_locuser_formals[)
{
yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1];
int yynrhs = yyrhsLength (yyopt->yyrule);
YYRESULTTAG yyflag =
yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[);
if (yyflag != yyok)
{
yyGLRState *yys;
for (yys = yyopt->yystate; yynrhs > 0; yys = yys->yypred, yynrhs -= 1)
yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
return yyflag;
}
yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_locations_if([[
if (yynrhs == 0)
/* Set default location. */
yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[
{
int yychar_current = yychar;
YYSTYPE yylval_current = yylval;]b4_locations_if([
YYLTYPE yylloc_current = yylloc;])[
yychar = yyopt->yyrawchar;
yylval = yyopt->yyval;]b4_locations_if([
yylloc = yyopt->yyloc;])[
yyflag = yyuserAction (yyopt->yyrule, yynrhs,
yyrhsVals + YYMAXRHS + YYMAXLEFT - 1,
yystackp, yyvalp]b4_locuser_args[);
yychar = yychar_current;
yylval = yylval_current;]b4_locations_if([
yylloc = yylloc_current;])[
}
return yyflag;
}
#if ]b4_api_PREFIX[DEBUG
static void
yyreportTree (yySemanticOption* yyx, int yyindent)
{
int yynrhs = yyrhsLength (yyx->yyrule);
int yyi;
yyGLRState* yys;
yyGLRState* yystates[1 + YYMAXRHS];
yyGLRState yyleftmost_state;
for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred)
yystates[yyi] = yys;
if (yys == YY_NULLPTR)
{
yyleftmost_state.yyposn = 0;
yystates[0] = &yyleftmost_state;
}
else
yystates[0] = yys;
if (yyx->yystate->yyposn < yys->yyposn + 1)
YYFPRINTF (stderr, "%*s%s -> \n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
yyx->yyrule - 1);
else
YYFPRINTF (stderr, "%*s%s -> \n",
yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)),
yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1),
(unsigned long int) yyx->yystate->yyposn);
for (yyi = 1; yyi <= yynrhs; yyi += 1)
{
if (yystates[yyi]->yyresolved)
{
if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn)
YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "",
yytokenName (yystos[yystates[yyi]->yylrState]));
else
YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "",
yytokenName (yystos[yystates[yyi]->yylrState]),
(unsigned long int) (yystates[yyi-1]->yyposn + 1),
(unsigned long int) yystates[yyi]->yyposn);
}
else
yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2);
}
}
#endif
static YYRESULTTAG
yyreportAmbiguity (yySemanticOption* yyx0,
yySemanticOption* yyx1]b4_pure_formals[)
{
YYUSE (yyx0);
YYUSE (yyx1);
#if ]b4_api_PREFIX[DEBUG
YYFPRINTF (stderr, "Ambiguity detected.\n");
YYFPRINTF (stderr, "Option 1,\n");
yyreportTree (yyx0, 2);
YYFPRINTF (stderr, "\nOption 2,\n");
yyreportTree (yyx1, 2);
YYFPRINTF (stderr, "\n");
#endif
yyerror (]b4_yyerror_args[YY_("syntax is ambiguous"));
return yyabort;
}]b4_locations_if([[
/** Resolve the locations for each of the YYN1 states in *YYSTACKP,
* ending at YYS1. Has no effect on previously resolved states.
* The first semantic option of a state is always chosen. */
static void
yyresolveLocations (yyGLRState* yys1, int yyn1,
yyGLRStack *yystackp]b4_user_formals[)
{
if (0 < yyn1)
{
yyresolveLocations (yys1->yypred, yyn1 - 1, yystackp]b4_user_args[);
if (!yys1->yyresolved)
{
yyGLRStackItem yyrhsloc[1 + YYMAXRHS];
int yynrhs;
yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal;
YYASSERT (yyoption != YY_NULLPTR);
yynrhs = yyrhsLength (yyoption->yyrule);
if (yynrhs > 0)
{
yyGLRState *yys;
int yyn;
yyresolveLocations (yyoption->yystate, yynrhs,
yystackp]b4_user_args[);
for (yys = yyoption->yystate, yyn = yynrhs;
yyn > 0;
yys = yys->yypred, yyn -= 1)
yyrhsloc[yyn].yystate.yyloc = yys->yyloc;
}
else
{
/* Both yyresolveAction and yyresolveLocations traverse the GSS
in reverse rightmost order. It is only necessary to invoke
yyresolveLocations on a subforest for which yyresolveAction
would have been invoked next had an ambiguity not been
detected. Thus the location of the previous state (but not
necessarily the previous state itself) is guaranteed to be
resolved already. */
yyGLRState *yyprevious = yyoption->yystate;
yyrhsloc[0].yystate.yyloc = yyprevious->yyloc;
}
{
int yychar_current = yychar;
YYSTYPE yylval_current = yylval;
YYLTYPE yylloc_current = yylloc;
yychar = yyoption->yyrawchar;
yylval = yyoption->yyval;
yylloc = yyoption->yyloc;
YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs);
yychar = yychar_current;
yylval = yylval_current;
yylloc = yylloc_current;
}
}
}
}]])[
/** Resolve the ambiguity represented in state YYS in *YYSTACKP,
* perform the indicated actions, and set the semantic value of YYS.
* If result != yyok, the chain of semantic options in YYS has been
* cleared instead or it has been left unmodified except that
* redundant options may have been removed. Regardless of whether
* result = yyok, YYS has been left with consistent data so that
* yydestroyGLRState can be invoked if necessary. */
static YYRESULTTAG
yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[)
{
yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal;
yySemanticOption* yybest = yyoptionList;
yySemanticOption** yypp;
yybool yymerge = yyfalse;
YYSTYPE yysval;
YYRESULTTAG yyflag;]b4_locations_if([
YYLTYPE *yylocp = &yys->yyloc;])[
for (yypp = &yyoptionList->yynext; *yypp != YY_NULLPTR; )
{
yySemanticOption* yyp = *yypp;
if (yyidenticalOptions (yybest, yyp))
{
yymergeOptionSets (yybest, yyp);
*yypp = yyp->yynext;
}
else
{
switch (yypreference (yybest, yyp))
{
case 0:]b4_locations_if([[
yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[
return yyreportAmbiguity (yybest, yyp]b4_pure_args[);
break;
case 1:
yymerge = yytrue;
break;
case 2:
break;
case 3:
yybest = yyp;
yymerge = yyfalse;
break;
default:
/* This cannot happen so it is not worth a YYASSERT (yyfalse),
but some compilers complain if the default case is
omitted. */
break;
}
yypp = &yyp->yynext;
}
}
if (yymerge)
{
yySemanticOption* yyp;
int yyprec = yydprec[yybest->yyrule];
yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[);
if (yyflag == yyok)
for (yyp = yybest->yynext; yyp != YY_NULLPTR; yyp = yyp->yynext)
{
if (yyprec == yydprec[yyp->yyrule])
{
YYSTYPE yysval_other;]b4_locations_if([
YYLTYPE yydummy;])[
yyflag = yyresolveAction (yyp, yystackp, &yysval_other]b4_locuser_args([&yydummy])[);
if (yyflag != yyok)
{
yydestruct ("Cleanup: discarding incompletely merged value for",
yystos[yys->yylrState],
&yysval]b4_locuser_args[);
break;
}
yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other);
}
}
}
else
yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args([yylocp])[);
if (yyflag == yyok)
{
yys->yyresolved = yytrue;
yys->yysemantics.yysval = yysval;
}
else
yys->yysemantics.yyfirstVal = YY_NULLPTR;
return yyflag;
}
static YYRESULTTAG
yyresolveStack (yyGLRStack* yystackp]b4_user_formals[)
{
if (yystackp->yysplitPoint != YY_NULLPTR)
{
yyGLRState* yys;
int yyn;
for (yyn = 0, yys = yystackp->yytops.yystates[0];
yys != yystackp->yysplitPoint;
yys = yys->yypred, yyn += 1)
continue;
YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp
]b4_user_args[));
}
return yyok;
}
static void
yycompressStack (yyGLRStack* yystackp)
{
yyGLRState* yyp, *yyq, *yyr;
if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULLPTR)
return;
for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULLPTR;
yyp != yystackp->yysplitPoint;
yyr = yyp, yyp = yyq, yyq = yyp->yypred)
yyp->yypred = yyr;
yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems;
yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1;
yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems;
yystackp->yysplitPoint = YY_NULLPTR;
yystackp->yylastDeleted = YY_NULLPTR;
while (yyr != YY_NULLPTR)
{
yystackp->yynextFree->yystate = *yyr;
yyr = yyr->yypred;
yystackp->yynextFree->yystate.yypred = &yystackp->yynextFree[-1].yystate;
yystackp->yytops.yystates[0] = &yystackp->yynextFree->yystate;
yystackp->yynextFree += 1;
yystackp->yyspaceLeft -= 1;
}
}
static YYRESULTTAG
yyprocessOneStack (yyGLRStack* yystackp, size_t yyk,
size_t yyposn]b4_pure_formals[)
{
while (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
{
yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState;
YYDPRINTF ((stderr, "Stack %lu Entering state %d\n",
(unsigned long int) yyk, yystate));
YYASSERT (yystate != YYFINAL);
if (yyisDefaultedState (yystate))
{
YYRESULTTAG yyflag;
yyRuleNum yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
YYDPRINTF ((stderr, "Stack %lu dies.\n",
(unsigned long int) yyk));
yymarkStackDeleted (yystackp, yyk);
return yyok;
}
yyflag = yyglrReduce (yystackp, yyk, yyrule, yyimmediate[yyrule]]b4_user_args[);
if (yyflag == yyerr)
{
YYDPRINTF ((stderr,
"Stack %lu dies "
"(predicate failure or explicit user error).\n",
(unsigned long int) yyk));
yymarkStackDeleted (yystackp, yyk);
return yyok;
}
if (yyflag != yyok)
return yyflag;
}
else
{
yySymbol yytoken;
int yyaction;
const short int* yyconflicts;
yystackp->yytops.yylookaheadNeeds[yyk] = yytrue;
if (yychar == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = ]b4_lex[;
}
if (yychar <= YYEOF)
{
yychar = yytoken = YYEOF;
YYDPRINTF ((stderr, "Now at end of input.\n"));
}
else
{
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
while (*yyconflicts != 0)
{
YYRESULTTAG yyflag;
size_t yynewStack = yysplitStack (yystackp, yyk);
YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n",
(unsigned long int) yynewStack,
(unsigned long int) yyk));
yyflag = yyglrReduce (yystackp, yynewStack,
*yyconflicts,
yyimmediate[*yyconflicts]]b4_user_args[);
if (yyflag == yyok)
YYCHK (yyprocessOneStack (yystackp, yynewStack,
yyposn]b4_pure_args[));
else if (yyflag == yyerr)
{
YYDPRINTF ((stderr, "Stack %lu dies.\n",
(unsigned long int) yynewStack));
yymarkStackDeleted (yystackp, yynewStack);
}
else
return yyflag;
yyconflicts += 1;
}
if (yyisShiftAction (yyaction))
break;
else if (yyisErrorAction (yyaction))
{
YYDPRINTF ((stderr, "Stack %lu dies.\n",
(unsigned long int) yyk));
yymarkStackDeleted (yystackp, yyk);
break;
}
else
{
YYRESULTTAG yyflag = yyglrReduce (yystackp, yyk, -yyaction,
yyimmediate[-yyaction]]b4_user_args[);
if (yyflag == yyerr)
{
YYDPRINTF ((stderr,
"Stack %lu dies "
"(predicate failure or explicit user error).\n",
(unsigned long int) yyk));
yymarkStackDeleted (yystackp, yyk);
break;
}
else if (yyflag != yyok)
return yyflag;
}
}
}
return yyok;
}
static void
yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
if (yystackp->yyerrState != 0)
return;
#if ! YYERROR_VERBOSE
yyerror (]b4_lyyerror_args[YY_("syntax error"));
#else
{
yySymbol yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar);
size_t yysize0 = yytnamerr (YY_NULLPTR, yytokenName (yytoken));
size_t yysize = yysize0;
yybool yysize_overflow = yyfalse;
char* yymsg = YY_NULLPTR;
enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
/* Internationalized format string. */
const char *yyformat = YY_NULLPTR;
/* Arguments of yyformat. */
char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
/* Number of reported tokens (one for the "unexpected", one per
"expected"). */
int yycount = 0;
/* There are many possibilities here to consider:
- If this state is a consistent state with a default action, then
the only way this function was invoked is if the default action
is an error action. In that case, don't check for expected
tokens because there are none.
- The only way there can be no lookahead present (in yychar) is if
this state is a consistent state with a default action. Thus,
detecting the absence of a lookahead is sufficient to determine
that there is no unexpected or expected token to report. In that
case, just report a simple "syntax error".
- Don't assume there isn't a lookahead just because this state is a
consistent state with a default action. There might have been a
previous inconsistent state, consistent state with a non-default
action, or user semantic action that manipulated yychar.
- Of course, the expected token list depends on states to have
correct lookahead information, and it depends on the parser not
to perform extra reductions after fetching a lookahead from the
scanner and before detecting a syntax error. Thus, state merging
(from LALR or IELR) and default reductions corrupt the expected
token list. However, the list is correct for canonical LR with
one exception: it will still contain any token that will not be
accepted due to an error action in a later state.
*/
if (yytoken != YYEMPTY)
{
int yyn = yypact[yystackp->yytops.yystates[0]->yylrState];
yyarg[yycount++] = yytokenName (yytoken);
if (!yypact_value_is_default (yyn))
{
/* Start YYX at -YYN if negative to avoid negative indexes in
YYCHECK. In other words, skip the first -YYN actions for this
state because they are default actions. */
int yyxbegin = yyn < 0 ? -yyn : 0;
/* Stay within bounds of both yycheck and yytname. */
int yychecklim = YYLAST - yyn + 1;
int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
int yyx;
for (yyx = yyxbegin; yyx < yyxend; ++yyx)
if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR
&& !yytable_value_is_error (yytable[yyx + yyn]))
{
if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM)
{
yycount = 1;
yysize = yysize0;
break;
}
yyarg[yycount++] = yytokenName (yyx);
{
size_t yysz = yysize + yytnamerr (YY_NULLPTR, yytokenName (yyx));
yysize_overflow |= yysz < yysize;
yysize = yysz;
}
}
}
}
switch (yycount)
{
#define YYCASE_(N, S) \
case N: \
yyformat = S; \
break
YYCASE_(0, YY_("syntax error"));
YYCASE_(1, YY_("syntax error, unexpected %s"));
YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s"));
YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s"));
YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s"));
YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"));
#undef YYCASE_
}
{
size_t yysz = yysize + strlen (yyformat);
yysize_overflow |= yysz < yysize;
yysize = yysz;
}
if (!yysize_overflow)
yymsg = (char *) YYMALLOC (yysize);
if (yymsg)
{
char *yyp = yymsg;
int yyi = 0;
while ((*yyp = *yyformat))
{
if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount)
{
yyp += yytnamerr (yyp, yyarg[yyi++]);
yyformat += 2;
}
else
{
yyp++;
yyformat++;
}
}
yyerror (]b4_lyyerror_args[yymsg);
YYFREE (yymsg);
}
else
{
yyerror (]b4_lyyerror_args[YY_("syntax error"));
yyMemoryExhausted (yystackp);
}
}
#endif /* YYERROR_VERBOSE */
yynerrs += 1;
}
/* Recover from a syntax error on *YYSTACKP, assuming that *YYSTACKP->YYTOKENP,
yylval, and yylloc are the syntactic category, semantic value, and location
of the lookahead. */
static void
yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
{
size_t yyk;
int yyj;
if (yystackp->yyerrState == 3)
/* We just shifted the error token and (perhaps) took some
reductions. Skip tokens until we can proceed. */
while (yytrue)
{
yySymbol yytoken;
if (yychar == YYEOF)
yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
if (yychar != YYEMPTY)
{]b4_locations_if([[
/* We throw away the lookahead, but the error range
of the shifted error token must take it into account. */
yyGLRState *yys = yystackp->yytops.yystates[0];
yyGLRStackItem yyerror_range[3];
yyerror_range[1].yystate.yyloc = yys->yyloc;
yyerror_range[2].yystate.yyloc = yylloc;
YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[
yytoken = YYTRANSLATE (yychar);
yydestruct ("Error: discarding",
yytoken, &yylval]b4_locuser_args([&yylloc])[);
}
YYDPRINTF ((stderr, "Reading a token: "));
yychar = ]b4_lex[;
if (yychar <= YYEOF)
{
yychar = yytoken = YYEOF;
YYDPRINTF ((stderr, "Now at end of input.\n"));
}
else
{
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
yyj = yypact[yystackp->yytops.yystates[0]->yylrState];
if (yypact_value_is_default (yyj))
return;
yyj += yytoken;
if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken)
{
if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0)
return;
}
else if (! yytable_value_is_error (yytable[yyj]))
return;
}
/* Reduce to one stack. */
for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1)
if (yystackp->yytops.yystates[yyk] != YY_NULLPTR)
break;
if (yyk >= yystackp->yytops.yysize)
yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1)
yymarkStackDeleted (yystackp, yyk);
yyremoveDeletes (yystackp);
yycompressStack (yystackp);
/* Now pop stack until we find a state that shifts the error token. */
yystackp->yyerrState = 3;
while (yystackp->yytops.yystates[0] != YY_NULLPTR)
{
yyGLRState *yys = yystackp->yytops.yystates[0];
yyj = yypact[yys->yylrState];
if (! yypact_value_is_default (yyj))
{
yyj += YYTERROR;
if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR
&& yyisShiftAction (yytable[yyj]))
{
/* Shift the error token. */]b4_locations_if([[
/* First adjust its location.*/
YYLTYPE yyerrloc;
yystackp->yyerror_range[2].yystate.yyloc = yylloc;
YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[
YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]],
&yylval, &yyerrloc);
yyglrShift (yystackp, 0, yytable[yyj],
yys->yyposn, &yylval]b4_locations_if([, &yyerrloc])[);
yys = yystackp->yytops.yystates[0];
break;
}
}]b4_locations_if([[
yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[
if (yys->yypred != YY_NULLPTR)
yydestroyGLRState ("Error: popping", yys]b4_user_args[);
yystackp->yytops.yystates[0] = yys->yypred;
yystackp->yynextFree -= 1;
yystackp->yyspaceLeft += 1;
}
if (yystackp->yytops.yystates[0] == YY_NULLPTR)
yyFail (yystackp][]b4_lpure_args[, YY_NULLPTR);
}
#define YYCHK1(YYE) \
do { \
switch (YYE) { \
case yyok: \
break; \
case yyabort: \
goto yyabortlab; \
case yyaccept: \
goto yyacceptlab; \
case yyerr: \
goto yyuser_error; \
default: \
goto yybuglab; \
} \
} while (0)
/*----------.
| yyparse. |
`----------*/
]b4_function_define([yyparse], [int], b4_parse_param)[
{
int yyresult;
yyGLRStack yystack;
yyGLRStack* const yystackp = &yystack;
size_t yyposn;
YYDPRINTF ((stderr, "Starting parse\n"));
yychar = YYEMPTY;
yylval = yyval_default;]b4_locations_if([
yylloc = yyloc_default;])[
]m4_ifdef([b4_initial_action], [
b4_dollar_pushdef([yylval], [], [yylloc])dnl
/* User initialization code. */
b4_user_initial_action
b4_dollar_popdef])[]dnl
[
if (! yyinitGLRStack (yystackp, YYINITDEPTH))
goto yyexhaustedlab;
switch (YYSETJMP (yystack.yyexception_buffer))
{
case 0: break;
case 1: goto yyabortlab;
case 2: goto yyexhaustedlab;
default: goto yybuglab;
}
yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[);
yyposn = 0;
while (yytrue)
{
/* For efficiency, we have two loops, the first of which is
specialized to deterministic operation (single stack, no
potential ambiguity). */
/* Standard mode */
while (yytrue)
{
yyRuleNum yyrule;
int yyaction;
const short int* yyconflicts;
yyStateNum yystate = yystack.yytops.yystates[0]->yylrState;
YYDPRINTF ((stderr, "Entering state %d\n", yystate));
if (yystate == YYFINAL)
goto yyacceptlab;
if (yyisDefaultedState (yystate))
{
yyrule = yydefaultAction (yystate);
if (yyrule == 0)
{
]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[));
}
else
{
yySymbol yytoken;
if (yychar == YYEMPTY)
{
YYDPRINTF ((stderr, "Reading a token: "));
yychar = ]b4_lex[;
}
if (yychar <= YYEOF)
{
yychar = yytoken = YYEOF;
YYDPRINTF ((stderr, "Now at end of input.\n"));
}
else
{
yytoken = YYTRANSLATE (yychar);
YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
}
yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts);
if (*yyconflicts != 0)
break;
if (yyisShiftAction (yyaction))
{
YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
yychar = YYEMPTY;
yyposn += 1;
yyglrShift (&yystack, 0, yyaction, yyposn, &yylval]b4_locations_if([, &yylloc])[);
if (0 < yystack.yyerrState)
yystack.yyerrState -= 1;
}
else if (yyisErrorAction (yyaction))
{
]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
else
YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[));
}
}
while (yytrue)
{
yySymbol yytoken_to_shift;
size_t yys;
for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY;
/* yyprocessOneStack returns one of three things:
- An error flag. If the caller is yyprocessOneStack, it
immediately returns as well. When the caller is finally
yyparse, it jumps to an error label via YYCHK1.
- yyok, but yyprocessOneStack has invoked yymarkStackDeleted
(&yystack, yys), which sets the top state of yys to NULL. Thus,
yyparse's following invocation of yyremoveDeletes will remove
the stack.
- yyok, when ready to shift a token.
Except in the first case, yyparse will invoke yyremoveDeletes and
then shift the next token onto all remaining stacks. This
synchronization of the shift (that is, after all preceding
reductions on all stacks) helps prevent double destructor calls
on yylval in the event of memory exhaustion. */
for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[));
yyremoveDeletes (&yystack);
if (yystack.yytops.yysize == 0)
{
yyundeleteLastStack (&yystack);
if (yystack.yytops.yysize == 0)
yyFail (&yystack][]b4_lpure_args[, YY_("syntax error"));
YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[
yyreportSyntaxError (&yystack]b4_user_args[);
goto yyuser_error;
}
/* If any yyglrShift call fails, it will fail after shifting. Thus,
a copy of yylval will already be on stack 0 in the event of a
failure in the following loop. Thus, yychar is set to YYEMPTY
before the loop to make sure the user destructor for yylval isn't
called twice. */
yytoken_to_shift = YYTRANSLATE (yychar);
yychar = YYEMPTY;
yyposn += 1;
for (yys = 0; yys < yystack.yytops.yysize; yys += 1)
{
int yyaction;
const short int* yyconflicts;
yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState;
yygetLRActions (yystate, yytoken_to_shift, &yyaction,
&yyconflicts);
/* Note that yyconflicts were handled by yyprocessOneStack. */
YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys));
YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc);
yyglrShift (&yystack, yys, yyaction, yyposn,
&yylval]b4_locations_if([, &yylloc])[);
YYDPRINTF ((stderr, "Stack %lu now in state #%d\n",
(unsigned long int) yys,
yystack.yytops.yystates[yys]->yylrState));
}
if (yystack.yytops.yysize == 1)
{
YYCHK1 (yyresolveStack (&yystack]b4_user_args[));
YYDPRINTF ((stderr, "Returning to deterministic operation.\n"));
yycompressStack (&yystack);
break;
}
}
continue;
yyuser_error:
yyrecoverSyntaxError (&yystack]b4_user_args[);
yyposn = yystack.yytops.yystates[0]->yyposn;
}
yyacceptlab:
yyresult = 0;
goto yyreturn;
yybuglab:
YYASSERT (yyfalse);
goto yyabortlab;
yyabortlab:
yyresult = 1;
goto yyreturn;
yyexhaustedlab:
yyerror (]b4_lyyerror_args[YY_("memory exhausted"));
yyresult = 2;
goto yyreturn;
yyreturn:
if (yychar != YYEMPTY)
yydestruct ("Cleanup: discarding lookahead",
YYTRANSLATE (yychar), &yylval]b4_locuser_args([&yylloc])[);
/* If the stack is well-formed, pop the stack until it is empty,
destroying its entries as we go. But free the stack regardless
of whether it is well-formed. */
if (yystack.yyitems)
{
yyGLRState** yystates = yystack.yytops.yystates;
if (yystates)
{
size_t yysize = yystack.yytops.yysize;
size_t yyk;
for (yyk = 0; yyk < yysize; yyk += 1)
if (yystates[yyk])
{
while (yystates[yyk])
{
yyGLRState *yys = yystates[yyk];
]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]]
)[ if (yys->yypred != YY_NULLPTR)
yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[);
yystates[yyk] = yys->yypred;
yystack.yynextFree -= 1;
yystack.yyspaceLeft += 1;
}
break;
}
}
yyfreeGLRStack (&yystack);
}
return yyresult;
}
/* DEBUGGING ONLY */
#if ]b4_api_PREFIX[DEBUG
static void
yy_yypstack (yyGLRState* yys)
{
if (yys->yypred)
{
yy_yypstack (yys->yypred);
YYFPRINTF (stderr, " -> ");
}
YYFPRINTF (stderr, "%d@@%lu", yys->yylrState,
(unsigned long int) yys->yyposn);
}
static void
yypstates (yyGLRState* yyst)
{
if (yyst == YY_NULLPTR)
YYFPRINTF (stderr, "");
else
yy_yypstack (yyst);
YYFPRINTF (stderr, "\n");
}
static void
yypstack (yyGLRStack* yystackp, size_t yyk)
{
yypstates (yystackp->yytops.yystates[yyk]);
}
#define YYINDEX(YYX) \
((YYX) == YY_NULLPTR ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems)
static void
yypdumpstack (yyGLRStack* yystackp)
{
yyGLRStackItem* yyp;
size_t yyi;
for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1)
{
YYFPRINTF (stderr, "%3lu. ",
(unsigned long int) (yyp - yystackp->yyitems));
if (*(yybool *) yyp)
{
YYASSERT (yyp->yystate.yyisState);
YYASSERT (yyp->yyoption.yyisState);
YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld",
yyp->yystate.yyresolved, yyp->yystate.yylrState,
(unsigned long int) yyp->yystate.yyposn,
(long int) YYINDEX (yyp->yystate.yypred));
if (! yyp->yystate.yyresolved)
YYFPRINTF (stderr, ", firstVal: %ld",
(long int) YYINDEX (yyp->yystate
.yysemantics.yyfirstVal));
}
else
{
YYASSERT (!yyp->yystate.yyisState);
YYASSERT (!yyp->yyoption.yyisState);
YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld",
yyp->yyoption.yyrule - 1,
(long int) YYINDEX (yyp->yyoption.yystate),
(long int) YYINDEX (yyp->yyoption.yynext));
}
YYFPRINTF (stderr, "\n");
}
YYFPRINTF (stderr, "Tops:");
for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1)
YYFPRINTF (stderr, "%lu: %ld; ", (unsigned long int) yyi,
(long int) YYINDEX (yystackp->yytops.yystates[yyi]));
YYFPRINTF (stderr, "\n");
}
#endif
#undef yylval
#undef yychar
#undef yynerrs]b4_locations_if([
#undef yylloc])
m4_if(b4_prefix, [yy], [],
[[/* Substitute the variable and function names. */
#define yyparse ]b4_prefix[parse
#define yylex ]b4_prefix[lex
#define yyerror ]b4_prefix[error
#define yylval ]b4_prefix[lval
#define yychar ]b4_prefix[char
#define yydebug ]b4_prefix[debug
#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[
#define yylloc ]b4_prefix[lloc]])])[
]b4_epilogue[]dnl
b4_output_end()
PK lCiZ
xslt/bison.xslnu [
s
r
,
0
PK lCiZ%"2 2 xslt/xml2dot.xslnu [
// Generated by GNU Bison
.
// Report bugs to <
>.
// Home page: <
>.
digraph "
"
{
node [fontname = courier, shape = box, colorscheme = paired6]
edge [fontname = courier]
}
0
label="[
,
]",
style=solid]
3
5
:
.
.
%empty
[
]
,
-> "
R
d
" [
"
R
d
" [label="
Acc", fillcolor=1
R
", fillcolor=
, shape=diamond, style=filled]
dotted
solid
dashed
[label="
State
\n
\l"]
->
[style=
label="
"
]
PK lCiZ~AX AX xslt/xml2xhtml.xslnu [
<xsl:value-of select="bison-xml-report/filename"/>
<xsl:text> - GNU Bison XML Automaton Report</xsl:text>
GNU Bison XML Automaton Report
input grammar:
Table of Contents
Reductions
Nonterminals useless in grammar
Terminals unused in grammar
Rules useless in grammar
Rules useless in parser due to conflicts
Grammar
Conflicts
conflicts:
Terminals, with rules where they appear
Nonterminals, with rules where they appear
on left:
on right:
Automaton
state
→
.
.
%empty
[
]
,
error
(
)
[
accept
(
)
]
Conflict between
and token
resolved as
an
(
).
0
PK lCiZ,oH oH xslt/xml2text.xslnu [
Nonterminals useless in grammar
Terminals unused in grammar
Rules useless in grammar
Rules useless in parser due to conflicts
Grammar
Terminals, with rules where they appear
Nonterminals, with rules where they appear
0
on@left:
,
on@right:
State
:
.
.
%empty
[
]
,
shift, and go to state
go to state
error
(
)
[
accept
reduce using rule
(
)
]
Conflict between rule
and token
resolved as
an
(
).
PK lCiZzZDV V bison.m4nu [ -*- Autoconf -*-
# Language-independent M4 Macros for Bison.
# Copyright (C) 2002, 2004-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
## ---------------- ##
## Identification. ##
## ---------------- ##
# b4_copyright(TITLE, [YEARS])
# ----------------------------
# If YEARS are not defined, use b4_copyright_years.
m4_define([b4_copyright],
[b4_comment([A Bison parser, made by GNU Bison b4_version.])
b4_comment([$1
]m4_dquote(m4_text_wrap([Copyright (C)
]m4_ifval([$2], [[$2]], [m4_defn([b4_copyright_years])])[
Free Software Foundation, Inc.]))[
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .])
b4_comment([As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
under terms of your choice, so long as that work isn't itself a
parser generator using the skeleton or a modified version thereof
as a parser skeleton. Alternatively, if you modify or redistribute
the parser skeleton itself, you may (at your option) remove this
special exception, which will cause the skeleton and the resulting
Bison output files to be licensed under the GNU General Public
License without this special exception.
This special exception was added by the Free Software Foundation in
version 2.2 of Bison.])])
## -------- ##
## Output. ##
## -------- ##
# b4_output_begin(FILE)
# ---------------------
# Enable output, i.e., send to diversion 0, expand after "#", and
# generate the tag to output into FILE. Must be followed by EOL.
m4_define([b4_output_begin],
[m4_changecom()
m4_divert_push(0)dnl
@output(m4_unquote([$1])@)@dnl
])
# b4_output_end()
# ---------------
# Output nothing, restore # as comment character (no expansions after #).
m4_define([b4_output_end],
[m4_divert_pop(0)
m4_changecom([#])
])
# b4_divert_kill(CODE)
# --------------------
# Expand CODE for its side effects, discard its output.
m4_define([b4_divert_kill],
[m4_divert_text([KILL], [$1])])
# b4_define_silent(MACRO, CODE)
# -----------------------------
# Same as m4_define, but throw away the expansion of CODE.
m4_define([b4_define_silent],
[m4_define([$1], [b4_divert_kill([$2])])])
## ---------------- ##
## Error handling. ##
## ---------------- ##
# The following error handling macros print error directives that should not
# become arguments of other macro invocations since they would likely then be
# mangled. Thus, they print to stdout directly.
# b4_cat(TEXT)
# ------------
# Write TEXT to stdout. Precede the final newline with an @ so that it's
# escaped. For example:
#
# b4_cat([[@complain(invalid input@)]])
m4_define([b4_cat],
[m4_syscmd([cat <<'_m4eof'
]m4_bpatsubst(m4_dquote($1), [_m4eof], [_m4@`eof])[@
_m4eof
])dnl
m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
# b4_error(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------------------------
# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
# b4_error([[complain]], [[input.y:2.3]], [[input.y:5.4]],
# [[invalid %s]], [[foo]])
m4_define([b4_error],
[b4_cat([[@complain][(]$1[@,]$2[@,]$3[@,]$4[]]dnl
[m4_if([$#], [4], [],
[m4_foreach([b4_arg],
m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
[[@,]b4_arg])])[@)]])])
# b4_warn(FORMAT, [ARG1], [ARG2], ...)
# ------------------------------------
# Write @warn(FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
# b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]])
#
# As a simple test suite, this:
#
# m4_divert(-1)
# m4_define([asdf], [ASDF])
# m4_define([fsa], [FSA])
# m4_define([fdsa], [FDSA])
# b4_warn_at([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
# b4_warn_at([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
# b4_warn_at()
# b4_warn_at(1)
# b4_warn_at(1, 2)
#
# Should produce this without newlines:
#
# @warn_at([asdf), asdf]@,@,@,[fsa), fsa]@,[fdsa), fdsa]@)
# @warn(asdf), asdf@,@,@,fsa), fsa@,fdsa), fdsa@)
# @warn(@)
# @warn(1@)
# @warn(1@,2@)
m4_define([b4_warn],
[b4_error([[warn]], [], [], $@)])
# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# ---------------------------------------------------
# Write @warn(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
# b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
m4_define([b4_warn_at],
[b4_error([[warn]], $@)])
# b4_complain(FORMAT, [ARG1], [ARG2], ...)
# ----------------------------------------
# Bounce to b4_complain_at.
#
# See b4_warn example.
m4_define([b4_complain],
[b4_error([[complain]], [], [], $@)])
# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------------------------
# Write @complain(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# See b4_warn_at example.
m4_define([b4_complain_at],
[b4_error([[complain]], $@)])
# b4_fatal(FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------
# Bounce to b4_fatal_at.
#
# See b4_warn example.
m4_define([b4_fatal],
[b4_error([[fatal]], [], [], $@)dnl
m4_exit(1)])
# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# ----------------------------------------------------
# Write @fatal(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
#
# See b4_warn_at example.
m4_define([b4_fatal_at],
[b4_error([[fatal]], $@)dnl
m4_exit(1)])
## ------------ ##
## Data Types. ##
## ------------ ##
# b4_ints_in(INT1, INT2, LOW, HIGH)
# ---------------------------------
# Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise.
m4_define([b4_ints_in],
[m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])])
# b4_subtract(LHS, RHS)
# ---------------------
# Evaluate LHS - RHS if they are integer literals, otherwise expand
# to (LHS) - (RHS).
m4_define([b4_subtract],
[m4_bmatch([$1$2], [^[0123456789]*$],
[m4_eval([$1 - $2])],
[($1) - ($2)])])
# b4_join(ARG1, ...)
# _b4_join(ARG1, ...)
# -------------------
# Join with comma, skipping empty arguments.
# b4_join calls itself recursively until it sees the first non-empty
# argument, then calls _b4_join which prepends each non-empty argument
# with a comma.
m4_define([b4_join],
[m4_if([$#$1],
[1], [],
[m4_ifval([$1],
[$1[]_$0(m4_shift($@))],
[$0(m4_shift($@))])])])
# _b4_join(ARGS1, ...)
# --------------------
m4_define([_b4_join],
[m4_if([$#$1],
[1], [],
[m4_ifval([$1], [, $1])[]$0(m4_shift($@))])])
# b4_integral_parser_tables_map(MACRO)
# -------------------------------------
# Map MACRO on all the integral tables. MACRO is expected to have
# the signature MACRO(TABLE-NAME, CONTENT, COMMENT).
m4_define([b4_integral_parser_tables_map],
[$1([pact], [b4_pact],
[[YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
STATE-NUM.]])
$1([defact], [b4_defact],
[[YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
Performed when YYTABLE does not specify something else to do. Zero
means the default is an error.]])
$1([pgoto], [b4_pgoto], [[YYPGOTO[NTERM-NUM].]])
$1([defgoto], [b4_defgoto], [[YYDEFGOTO[NTERM-NUM].]])
$1([table], [b4_table],
[[YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM. If
positive, shift that token. If negative, reduce the rule whose
number is the opposite. If YYTABLE_NINF, syntax error.]])
$1([check], [b4_check])
$1([stos], [b4_stos],
[[YYSTOS[STATE-NUM] -- The (internal number of the) accessing
symbol of state STATE-NUM.]])
$1([r1], [b4_r1],
[[YYR1[YYN] -- Symbol number of symbol that rule YYN derives.]])
$1([r2], [b4_r2],
[[YYR2[YYN] -- Number of symbols on the right hand side of rule YYN.]])
])
# b4_parser_tables_declare
# b4_parser_tables_define
# ------------------------
# Define/declare the (deterministic) parser tables.
m4_define([b4_parser_tables_declare],
[b4_integral_parser_tables_map([b4_integral_parser_table_declare])])
m4_define([b4_parser_tables_define],
[b4_integral_parser_tables_map([b4_integral_parser_table_define])])
## ------------------ ##
## Decoding options. ##
## ------------------ ##
# b4_flag_if(FLAG, IF-TRUE, IF-FALSE)
# -----------------------------------
# Run IF-TRUE if b4_FLAG_flag is 1, IF-FALSE if FLAG is 0, otherwise fail.
m4_define([b4_flag_if],
[m4_case(b4_$1_flag,
[0], [$3],
[1], [$2],
[m4_fatal([invalid $1 value: ]b4_$1_flag)])])
# b4_define_flag_if(FLAG)
# -----------------------
# Define "b4_FLAG_if(IF-TRUE, IF-FALSE)" that depends on the
# value of the Boolean FLAG.
m4_define([b4_define_flag_if],
[_b4_define_flag_if($[1], $[2], [$1])])
# _b4_define_flag_if($1, $2, FLAG)
# --------------------------------
# Work around the impossibility to define macros inside macros,
# because issuing '[$1]' is not possible in M4. GNU M4 should provide
# $$1 a la M5/TeX.
m4_define([_b4_define_flag_if],
[m4_if([$1$2], $[1]$[2], [],
[m4_fatal([$0: Invalid arguments: $@])])dnl
m4_define([b4_$3_if],
[b4_flag_if([$3], [$1], [$2])])])
# b4_FLAG_if(IF-TRUE, IF-FALSE)
# -----------------------------
# Expand IF-TRUE, if FLAG is true, IF-FALSE otherwise.
b4_define_flag_if([defines]) # Whether headers are requested.
b4_define_flag_if([glr]) # Whether a GLR parser is requested.
b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
b4_define_flag_if([token_table]) # Whether yytoken_table is demanded.
b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
## --------- ##
## Symbols. ##
## --------- ##
# In order to unify the handling of the various aspects of symbols
# (tag, type_name, whether terminal, etc.), bison.exe defines one
# macro per (token, field), where field can has_id, id, etc.: see
# src/output.c:prepare_symbols_definitions().
#
# The various FIELDS are:
#
# - has_id: 0 or 1.
# Whether the symbol has an id.
# - id: string
# If has_id, the id. Guaranteed to be usable as a C identifier.
# Prefixed by api.token.prefix if defined.
# - tag: string.
# A representat of the symbol. Can be 'foo', 'foo.id', '"foo"' etc.
# - user_number: integer
# The assigned (external) number as used by yylex.
# - is_token: 0 or 1
# Whether this is a terminal symbol.
# - number: integer
# The internalized number (used after yytranslate).
# - has_type: 0, 1
# Whether has a semantic value.
# - type_tag: string
# When api.value.type=union, the generated name for the union member.
# yytype_INT etc. for symbols that has_id, otherwise yytype_1 etc.
# - type
# If it has a semantic value, its type tag, or, if variant are used,
# its type.
# In the case of api.value.type=union, type is the real type (e.g. int).
# - has_printer: 0, 1
# - printer: string
# - printer_file: string
# - printer_line: integer
# If the symbol has a printer, everything about it.
# - has_destructor, destructor, destructor_file, destructor_line
# Likewise.
#
# The following macros provide access to these values.
# b4_symbol_(NUM, FIELD)
# ----------------------
# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
# undefined.
m4_define([b4_symbol_],
[m4_indir([b4_symbol($1, $2)])])
# b4_symbol(NUM, FIELD)
# ---------------------
# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
# undefined. If FIELD = id, prepend the token prefix.
m4_define([b4_symbol],
[m4_case([$2],
[id], [m4_do([b4_percent_define_get([api.token.prefix])],
[b4_symbol_([$1], [id])])],
[b4_symbol_($@)])])
# b4_symbol_if(NUM, FIELD, IF-TRUE, IF-FALSE)
# -------------------------------------------
# If FIELD about symbol #NUM is 1 expand IF-TRUE, if is 0, expand IF-FALSE.
# Otherwise an error.
m4_define([b4_symbol_if],
[m4_case(b4_symbol([$1], [$2]),
[1], [$3],
[0], [$4],
[m4_fatal([$0: field $2 of $1 is not a Boolean:] b4_symbol([$1], [$2]))])])
# b4_symbol_tag_comment(SYMBOL-NUM)
# ---------------------------------
# Issue a comment giving the tag of symbol NUM.
m4_define([b4_symbol_tag_comment],
[b4_comment([b4_symbol([$1], [tag])])
])
# b4_symbol_action_location(SYMBOL-NUM, KIND)
# -------------------------------------------
# Report the location of the KIND action as FILE:LINE.
m4_define([b4_symbol_action_location],
[b4_symbol([$1], [$2_file]):b4_syncline([b4_symbol([$1], [$2_line])])])
# b4_symbol_action(SYMBOL-NUM, KIND)
# ----------------------------------
# Run the action KIND (destructor or printer) for SYMBOL-NUM.
m4_define([b4_symbol_action],
[b4_symbol_if([$1], [has_$2],
[b4_dollar_pushdef([(*yyvaluep)],
b4_symbol_if([$1], [has_type],
[m4_dquote(b4_symbol([$1], [type]))]),
[(*yylocationp)])dnl
b4_symbol_case_([$1])[]dnl
b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
b4_symbol([$1], [$2])
b4_syncline([@oline@], [@ofile@])
break;
b4_dollar_popdef[]dnl
])])
# b4_symbol_destructor(SYMBOL-NUM)
# b4_symbol_printer(SYMBOL-NUM)
# --------------------------------
m4_define([b4_symbol_destructor], [b4_symbol_action([$1], [destructor])])
m4_define([b4_symbol_printer], [b4_symbol_action([$1], [printer])])
# b4_symbol_actions(KIND, [TYPE = yytype])
# ----------------------------------------
# Emit the symbol actions for KIND ("printer" or "destructor").
# Dispatch on TYPE.
m4_define([b4_symbol_actions],
[m4_pushdef([b4_actions_], m4_expand([b4_symbol_foreach([b4_symbol_$1])]))dnl
m4_ifval(m4_defn([b4_actions_]),
[switch (m4_default([$2], [yytype]))
{
m4_defn([b4_actions_])
default:
break;
}dnl
],
[YYUSE (m4_default([$2], [yytype]));])dnl
m4_popdef([b4_actions_])dnl
])
# b4_symbol_case_(SYMBOL-NUM)
# ---------------------------
# Issue a "case NUM" for SYMBOL-NUM.
m4_define([b4_symbol_case_],
[case b4_symbol([$1], [number]): b4_symbol_tag_comment([$1])])
])
# b4_symbol_foreach(MACRO)
# ------------------------
# Invoke MACRO(SYMBOL-NUM) for each SYMBOL-NUM.
m4_define([b4_symbol_foreach],
[m4_map([$1], m4_defn([b4_symbol_numbers]))])
# b4_symbol_map(MACRO)
# --------------------
# Return a list (possibly empty elements) of MACRO invoked for each
# SYMBOL-NUM.
m4_define([b4_symbol_map],
[m4_map_args_sep([$1(], [)], [,], b4_symbol_numbers)])
# b4_token_visible_if(NUM, IF-TRUE, IF-FALSE)
# -------------------------------------------
# Whether NUM denotes a token that has an exported definition (i.e.,
# shows in enum yytokentype).
m4_define([b4_token_visible_if],
[b4_symbol_if([$1], [is_token],
[b4_symbol_if([$1], [has_id], [$2], [$3])],
[$3])])
# b4_token_has_definition(NUM)
# ----------------------------
# 1 if NUM is visible, nothing otherwise.
m4_define([b4_token_has_definition],
[b4_token_visible_if([$1], [1])])
# b4_any_token_visible_if([IF-TRUE], [IF-FALSE])
# ----------------------------------------------
# Whether there is a token that needs to be defined.
m4_define([b4_any_token_visible_if],
[m4_ifval(b4_symbol_foreach([b4_token_has_definition]),
[$1], [$2])])
# b4_token_format(FORMAT, NUM)
# ----------------------------
m4_define([b4_token_format],
[b4_token_visible_if([$2],
[m4_quote(m4_format([$1],
[b4_symbol([$2], [id])],
[b4_symbol([$2], [user_number])]))])])
## ------- ##
## Types. ##
## ------- ##
# b4_type_action_(NUMS)
# ---------------------
# Run actions for the symbol NUMS that all have the same type-name.
# Skip NUMS that have no type-name.
#
# To specify the action to run, define b4_dollar_dollar(NUMBER,
# TAG, TYPE).
m4_define([b4_type_action_],
[b4_symbol_if([$1], [has_type],
[m4_map([ b4_symbol_case_], [$@])[]dnl
b4_dollar_dollar([b4_symbol([$1], [number])],
[b4_symbol([$1], [tag])],
[b4_symbol([$1], [type])]);
break;
])])
# b4_type_foreach(MACRO)
# ----------------------
# Invoke MACRO(SYMBOL-NUMS) for each set of SYMBOL-NUMS for each type set.
m4_define([b4_type_foreach],
[m4_map([$1], m4_defn([b4_type_names]))])
## ----------- ##
## Synclines. ##
## ----------- ##
# b4_basename(NAME)
# -----------------
# Similar to POSIX basename; the differences don't matter here.
# Beware that NAME is not evaluated.
m4_define([b4_basename],
[m4_bpatsubst([$1], [^.*/\([^/]+\)/*$], [\1])])
# b4_syncline(LINE, FILE)
# -----------------------
m4_define([b4_syncline],
[b4_flag_if([synclines],
[b4_sync_start([$1], [$2]) b4_sync_end([__line__],
[b4_basename(m4_quote(__file__))])[]dnl
])])
# b4_sync_start(LINE, FILE)
# -----------------------
# Syncline for the new place. Typically a directive for the compiler.
m4_define([b4_sync_start], [b4_comment([$2:$1])])
# b4_sync_end(LINE, FILE)
# -----------------------
# Syncline for the current place, which ends. Typically a comment
# left for the reader.
m4_define([b4_sync_end], [b4_comment([$2:$1])])
# b4_user_code(USER-CODE)
# -----------------------
# Emit code from the user, ending it with synclines.
m4_define([b4_user_code],
[$1
b4_syncline([@oline@], [@ofile@])])
# b4_define_user_code(MACRO)
# --------------------------
# From b4_MACRO, build b4_user_MACRO that includes the synclines.
m4_define([b4_define_user_code],
[m4_define([b4_user_$1],
[b4_user_code([b4_$1])])])
# b4_user_actions
# b4_user_initial_action
# b4_user_post_prologue
# b4_user_pre_prologue
# b4_user_union_members
# ----------------------
# Macros that issue user code, ending with synclines.
b4_define_user_code([actions])
b4_define_user_code([initial_action])
b4_define_user_code([post_prologue])
b4_define_user_code([pre_prologue])
b4_define_user_code([union_members])
# b4_check_user_names(WHAT, USER-LIST, BISON-NAMESPACE)
# -----------------------------------------------------
# Complain if any name of type WHAT is used by the user (as recorded in
# USER-LIST) but is not used by Bison (as recorded by macros in the
# namespace BISON-NAMESPACE).
#
# USER-LIST must expand to a list specifying all user occurrences of all names
# of type WHAT. Each item in the list must be a triplet specifying one
# occurrence: name, start boundary, and end boundary. Empty string names are
# fine. An empty list is fine.
#
# For example, to define b4_foo_user_names to be used for USER-LIST with three
# name occurrences and with correct quoting:
#
# m4_define([b4_foo_user_names],
# [[[[[[bar]], [[parser.y:1.7]], [[parser.y:1.16]]]],
# [[[[bar]], [[parser.y:5.7]], [[parser.y:5.16]]]],
# [[[[baz]], [[parser.y:8.7]], [[parser.y:8.16]]]]]])
#
# The macro BISON-NAMESPACE(bar) must be defined iff the name bar of type WHAT
# is used by Bison (in the front-end or in the skeleton). Empty string names
# are fine, but it would be ugly for Bison to actually use one.
#
# For example, to use b4_foo_bison_names for BISON-NAMESPACE and define that
# the names bar and baz are used by Bison:
#
# m4_define([b4_foo_bison_names(bar)])
# m4_define([b4_foo_bison_names(baz)])
#
# To invoke b4_check_user_names with TYPE foo, with USER-LIST
# b4_foo_user_names, with BISON-NAMESPACE b4_foo_bison_names, and with correct
# quoting:
#
# b4_check_user_names([[foo]], [b4_foo_user_names],
# [[b4_foo_bison_names]])
m4_define([b4_check_user_names],
[m4_foreach([b4_occurrence], $2,
[m4_pushdef([b4_occurrence], b4_occurrence)dnl
m4_pushdef([b4_user_name], m4_car(b4_occurrence))dnl
m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
m4_ifndef($3[(]m4_quote(b4_user_name)[)],
[b4_complain_at([b4_start], [b4_end],
[[%s '%s' is not used]],
[$1], [b4_user_name])])[]dnl
m4_popdef([b4_occurrence])dnl
m4_popdef([b4_user_name])dnl
m4_popdef([b4_start])dnl
m4_popdef([b4_end])dnl
])])
## --------------------- ##
## b4_percent_define_*. ##
## --------------------- ##
# b4_percent_define_use(VARIABLE)
# -------------------------------
# Declare that VARIABLE was used.
m4_define([b4_percent_define_use],
[m4_define([b4_percent_define_bison_variables(]$1[)])dnl
])
# b4_percent_define_get(VARIABLE, [DEFAULT])
# ------------------------------------------
# Mimic muscle_percent_define_get in ../src/muscle-tab.h. That is, if
# the %define variable VARIABLE is defined, emit its value. Contrary
# to its C counterpart, return DEFAULT otherwise. Also, record
# Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
# For example:
#
# b4_percent_define_get([[foo]])
m4_define([b4_percent_define_get],
[b4_percent_define_use([$1])dnl
b4_percent_define_ifdef_([$1],
[m4_indir([b4_percent_define(]$1[)])],
[$2])])
# b4_percent_define_get_loc(VARIABLE)
# -----------------------------------
# Mimic muscle_percent_define_get_loc in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is undefined, complain fatally since that's
# a Bison or skeleton error. Otherwise, return its definition location in a
# form approriate for the first two arguments of b4_warn_at, b4_complain_at, or
# b4_fatal_at. Don't record this as a Bison usage of VARIABLE as there's no
# reason to suspect that the user-supplied value has yet influenced the output.
#
# For example:
#
# b4_complain_at(b4_percent_define_get_loc([[foo]]), [[invalid foo]])
m4_define([b4_percent_define_get_loc],
[m4_ifdef([b4_percent_define_loc(]$1[)],
[m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
b4_loc[]dnl
m4_popdef([b4_loc])],
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_get_kind(VARIABLE)
# ------------------------------------
# Get the kind (code, keyword, string) of VARIABLE, i.e., how its
# value was defined (braces, not delimiters, quotes).
#
# If the %define variable VARIABLE is undefined, complain fatally
# since that's a Bison or skeleton error. Don't record this as a
# Bison usage of VARIABLE as there's no reason to suspect that the
# user-supplied value has yet influenced the output.
m4_define([b4_percent_define_get_kind],
[m4_ifdef([b4_percent_define_kind(]$1[)],
[m4_indir([b4_percent_define_kind(]$1[)])],
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_get_syncline(VARIABLE)
# ----------------------------------------
# Mimic muscle_percent_define_get_syncline in ../src/muscle-tab.h exactly.
# That is, if the %define variable VARIABLE is undefined, complain fatally
# since that's a Bison or skeleton error. Otherwise, return its definition
# location as a b4_syncline invocation. Don't record this as a Bison usage of
# VARIABLE as there's no reason to suspect that the user-supplied value has yet
# influenced the output.
#
# For example:
#
# b4_percent_define_get_syncline([[foo]])
m4_define([b4_percent_define_get_syncline],
[m4_ifdef([b4_percent_define_syncline(]$1[)],
[m4_indir([b4_percent_define_syncline(]$1[)])],
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_ifdef_(VARIABLE, IF-TRUE, [IF-FALSE])
# ------------------------------------------------------
# If the %define variable VARIABLE is defined, expand IF-TRUE, else expand
# IF-FALSE. Don't record usage of VARIABLE.
#
# For example:
#
# b4_percent_define_ifdef_([[foo]], [[it's defined]], [[it's undefined]])
m4_define([b4_percent_define_ifdef_],
[m4_ifdef([b4_percent_define(]$1[)],
[$2],
[$3])])
# b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
# ------------------------------------------------------
# Mimic muscle_percent_define_ifdef in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is defined, expand IF-TRUE, else expand
# IF-FALSE. Also, record Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
# For example:
#
# b4_percent_define_ifdef([[foo]], [[it's defined]], [[it's undefined]])
m4_define([b4_percent_define_ifdef],
[b4_percent_define_ifdef_([$1],
[b4_percent_define_use([$1])$2],
[$3])])
## --------- ##
## Options. ##
## --------- ##
# b4_percent_define_flag_if(VARIABLE, IF-TRUE, [IF-FALSE])
# --------------------------------------------------------
# Mimic muscle_percent_define_flag_if in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is defined to "" or "true", expand IF-TRUE.
# If it is defined to "false", expand IF-FALSE. Complain if it is undefined
# (a Bison or skeleton error since the default value should have been set
# already) or defined to any other value (possibly a user error). Also, record
# Bison's usage of VARIABLE by defining
# b4_percent_define_bison_variables(VARIABLE).
#
# For example:
#
# b4_percent_define_flag_if([[foo]], [[it's true]], [[it's false]])
m4_define([b4_percent_define_flag_if],
[b4_percent_define_ifdef([$1],
[m4_case(b4_percent_define_get([$1]),
[], [$2], [true], [$2], [false], [$3],
[m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
[[invalid value for %%define Boolean variable '%s']],
[$1])],
[[b4_percent_define_flag_if($1)]])])],
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
# b4_percent_define_default(VARIABLE, DEFAULT, [KIND = keyword])
# --------------------------------------------------------------
# Mimic muscle_percent_define_default in ../src/muscle-tab.h exactly. That is,
# if the %define variable VARIABLE is undefined, set its value to DEFAULT.
# Don't record this as a Bison usage of VARIABLE as there's no reason to
# suspect that the value has yet influenced the output.
#
# For example:
#
# b4_percent_define_default([[foo]], [[default value]])
m4_define([b4_percent_define_default],
[b4_percent_define_ifdef_([$1], [],
[m4_define([b4_percent_define(]$1[)], [$2])dnl
m4_define([b4_percent_define_kind(]$1[)],
[m4_default([$3], [keyword])])dnl
m4_define([b4_percent_define_loc(]$1[)],
[[[[:-1.-1]],
[[:-1.-1]]]])dnl
m4_define([b4_percent_define_syncline(]$1[)], [[]])])])
# b4_percent_define_if_define(NAME, [VARIABLE = NAME])
# ----------------------------------------------------
# Define b4_NAME_if that executes its $1 or $2 depending whether
# VARIABLE was %defined. The characters '.' and `-' in VARIABLE are mapped
# to '_'.
m4_define([b4_percent_define_if_define_],
[m4_define(m4_bpatsubst([b4_$1_if], [[-.]], [_]),
[b4_percent_define_flag_if(m4_default([$2], [$1]),
[$3], [$4])])])
m4_define([b4_percent_define_if_define],
[b4_percent_define_default([m4_default([$2], [$1])], [[false]])
b4_percent_define_if_define_([$1], [$2], $[1], $[2])])
# b4_percent_define_check_kind(VARIABLE, KIND, [DIAGNOSTIC = complain])
# ---------------------------------------------------------------------
m4_define([b4_percent_define_check_kind],
[b4_percent_define_ifdef_([$1],
[m4_if(b4_percent_define_get_kind([$1]), [$2], [],
[b4_error([m4_default([$3], [complain])],
b4_percent_define_get_loc([$1]),
[m4_case([$2],
[code], [[%%define variable '%s' requires '{...}' values]],
[keyword], [[%%define variable '%s' requires keyword values]],
[string], [[%%define variable '%s' requires '"..."' values]])],
[$1])])])dnl
])
# b4_percent_define_check_values(VALUES)
# --------------------------------------
# Mimic muscle_percent_define_check_values in ../src/muscle-tab.h exactly
# except that the VALUES structure is more appropriate for M4. That is, VALUES
# is a list of sublists of strings. For each sublist, the first string is the
# name of a %define variable, and all remaining strings in that sublist are the
# valid values for that variable. Complain if such a variable is undefined (a
# Bison error since the default value should have been set already) or defined
# to any other value (possibly a user error). Don't record this as a Bison
# usage of the variable as there's no reason to suspect that the value has yet
# influenced the output.
#
# For example:
#
# b4_percent_define_check_values([[[[foo]], [[foo-value1]], [[foo-value2]]]],
# [[[[bar]], [[bar-value1]]]])
m4_define([b4_percent_define_check_values],
[m4_foreach([b4_sublist], m4_quote($@),
[_b4_percent_define_check_values(b4_sublist)])])
m4_define([_b4_percent_define_check_values],
[b4_percent_define_ifdef_([$1],
[b4_percent_define_check_kind(]$1[, [keyword], [deprecated])dnl
m4_pushdef([b4_good_value], [0])dnl
m4_if($#, 1, [],
[m4_foreach([b4_value], m4_dquote(m4_shift($@)),
[m4_if(m4_indir([b4_percent_define(]$1[)]), b4_value,
[m4_define([b4_good_value], [1])])])])dnl
m4_if(b4_good_value, [0],
[b4_complain_at(b4_percent_define_get_loc([$1]),
[[invalid value for %%define variable '%s': '%s']],
[$1],
m4_dquote(m4_indir([b4_percent_define(]$1[)])))
m4_foreach([b4_value], m4_dquote(m4_shift($@)),
[b4_error([[note]], b4_percent_define_get_loc([$1]), []
[[accepted value: '%s']],
m4_dquote(b4_value))])])dnl
m4_popdef([b4_good_value])],
[b4_fatal([[$0: undefined %%define variable '%s']], [$1])])])
# b4_percent_code_get([QUALIFIER])
# --------------------------------
# If any %code blocks for QUALIFIER are defined, emit them beginning with a
# comment and ending with synclines and a newline. If QUALIFIER is not
# specified or empty, do this for the unqualified %code blocks. Also, record
# Bison's usage of QUALIFIER (if specified) by defining
# b4_percent_code_bison_qualifiers(QUALIFIER).
#
# For example, to emit any unqualified %code blocks followed by any %code
# blocks for the qualifier foo:
#
# b4_percent_code_get
# b4_percent_code_get([[foo]])
m4_define([b4_percent_code_get],
[m4_pushdef([b4_macro_name], [[b4_percent_code(]$1[)]])dnl
m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])dnl
m4_ifdef(b4_macro_name,
[b4_comment([m4_if([$#], [0], [[Unqualified %code]],
[["%code ]$1["]])[ blocks.]])
b4_user_code([m4_indir(b4_macro_name)])
])dnl
m4_popdef([b4_macro_name])])
# b4_percent_code_ifdef(QUALIFIER, IF-TRUE, [IF-FALSE])
# -----------------------------------------------------
# If any %code blocks for QUALIFIER (or unqualified %code blocks if
# QUALIFIER is empty) are defined, expand IF-TRUE, else expand IF-FALSE.
# Also, record Bison's usage of QUALIFIER (if specified) by defining
# b4_percent_code_bison_qualifiers(QUALIFIER).
m4_define([b4_percent_code_ifdef],
[m4_ifdef([b4_percent_code(]$1[)],
[m4_ifval([$1], [m4_define([b4_percent_code_bison_qualifiers(]$1[)])])$2],
[$3])])
## ------------------ ##
## Common variables. ##
## ------------------ ##
# b4_parse_assert_if([IF-ASSERTIONS-ARE-USED], [IF-NOT])
# b4_parse_trace_if([IF-DEBUG-TRACES-ARE-ENABLED], [IF-NOT])
# b4_token_ctor_if([IF-YYLEX-RETURNS-A-TOKEN], [IF-NOT])
# ----------------------------------------------
b4_percent_define_if_define([token_ctor], [api.token.constructor])
b4_percent_define_if_define([locations]) # Whether locations are tracked.
b4_percent_define_if_define([parse.assert])
b4_percent_define_if_define([parse.trace])
# b4_bison_locations_if([IF-TRUE])
# --------------------------------
# Expand IF-TRUE if using locations, and using the default location
# type.
m4_define([b4_bison_locations_if],
[b4_locations_if([b4_percent_define_ifdef([[api.location.type]], [], [$1])])])
# b4_error_verbose_if([IF-ERRORS-ARE-VERBOSE], [IF-NOT])
# ------------------------------------------------------
# Map %define parse.error "(simple|verbose)" to b4_error_verbose_if and
# b4_error_verbose_flag.
b4_percent_define_default([[parse.error]], [[simple]])
b4_percent_define_check_values([[[[parse.error]],
[[simple]], [[verbose]]]])
m4_define([b4_error_verbose_flag],
[m4_case(b4_percent_define_get([[parse.error]]),
[simple], [[0]],
[verbose], [[1]])])
b4_define_flag_if([error_verbose])
# yytoken_table is needed to support verbose errors.
b4_error_verbose_if([m4_define([b4_token_table_flag], [1])])
# b4_variant_if([IF-VARIANT-ARE-USED], [IF-NOT])
# ----------------------------------------------
b4_percent_define_if_define([variant])
m4_define([b4_variant_flag], [[0]])
b4_percent_define_ifdef([[api.value.type]],
[m4_case(b4_percent_define_get_kind([[api.value.type]]), [keyword],
[m4_case(b4_percent_define_get([[api.value.type]]), [variant],
[m4_define([b4_variant_flag], [[1]])])])])
b4_define_flag_if([variant])
## ----------------------------------------------------------- ##
## After processing the skeletons, check that all the user's ##
## %define variables and %code qualifiers were used by Bison. ##
## ----------------------------------------------------------- ##
m4_define([b4_check_user_names_wrap],
[m4_ifdef([b4_percent_]$1[_user_]$2[s],
[b4_check_user_names([[%]$1 $2],
[b4_percent_]$1[_user_]$2[s],
[[b4_percent_]$1[_bison_]$2[s]])])])
m4_wrap_lifo([
b4_check_user_names_wrap([[define]], [[variable]])
b4_check_user_names_wrap([[code]], [[qualifier]])
])
## ---------------- ##
## Default values. ##
## ---------------- ##
# m4_define_default([b4_lex_param], []) dnl breaks other skeletons
m4_define_default([b4_pre_prologue], [])
m4_define_default([b4_post_prologue], [])
m4_define_default([b4_epilogue], [])
m4_define_default([b4_parse_param], [])
# The initial column and line.
m4_define_default([b4_location_initial_column], [1])
m4_define_default([b4_location_initial_line], [1])
## --------------- ##
## Sanity checks. ##
## --------------- ##
# api.location.prefix={...} (Java and C++).
b4_percent_define_check_kind([api.location.type], [code], [deprecated])
# api.position.prefix={...} (Java).
b4_percent_define_check_kind([api.position.type], [code], [deprecated])
# api.prefix >< %name-prefix.
b4_percent_define_check_kind([api.prefix], [code], [deprecated])
b4_percent_define_ifdef([api.prefix],
[m4_ifdef([b4_prefix],
[b4_complain_at(b4_percent_define_get_loc([api.prefix]),
[['%s' and '%s' cannot be used together]],
[%name-prefix],
[%define api.prefix])])])
# api.token.prefix={...}
# Make it a warning for those who used betas of Bison 3.0.
b4_percent_define_check_kind([api.token.prefix], [code], [deprecated])
# api.value.type >< %union.
b4_percent_define_ifdef([api.value.type],
[m4_ifdef([b4_union_members],
[b4_complain_at(b4_percent_define_get_loc([api.value.type]),
[['%s' and '%s' cannot be used together]],
[%union],
[%define api.value.type])])])
# api.value.type=union >< %yacc.
b4_percent_define_ifdef([api.value.type],
[m4_if(b4_percent_define_get([api.value.type]), [union],
[b4_yacc_if(dnl
[b4_complain_at(b4_percent_define_get_loc([api.value.type]),
[['%s' and '%s' cannot be used together]],
[%yacc],
[%define api.value.type "union"])])])])
# api.value.union.name.
b4_percent_define_check_kind([api.value.union.name], [keyword])
PK lCiZǏ stack.hhnu [ # C++ skeleton for Bison
# Copyright (C) 2002-2015 Free Software Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
m4_pushdef([b4_copyright_years],
[2002-2015])
# b4_stack_define
# ---------------
m4_define([b4_stack_define],
[[ template >
class stack
{
public:
// Hide our reversed order.
typedef typename S::reverse_iterator iterator;
typedef typename S::const_reverse_iterator const_iterator;
stack ()
: seq_ ()
{
seq_.reserve (200);
}
stack (unsigned int n)
: seq_ (n)
{}
inline
T&
operator[] (unsigned int i)
{
return seq_[seq_.size () - 1 - i];
}
inline
const T&
operator[] (unsigned int i) const
{
return seq_[seq_.size () - 1 - i];
}
/// Steal the contents of \a t.
///
/// Close to move-semantics.
inline
void
push (T& t)
{
seq_.push_back (T());
operator[](0).move (t);
}
inline
void
pop (unsigned int n = 1)
{
for (; n; --n)
seq_.pop_back ();
}
void
clear ()
{
seq_.clear ();
}
inline
typename S::size_type
size () const
{
return seq_.size ();
}
inline
const_iterator
begin () const
{
return seq_.rbegin ();
}
inline
const_iterator
end () const
{
return seq_.rend ();
}
private:
stack (const stack&);
stack& operator= (const stack&);
/// The wrapped container.
S seq_;
};
/// Present a slice of the top of a stack.
template >
class slice
{
public:
slice (const S& stack, unsigned int range)
: stack_ (stack)
, range_ (range)
{}
inline
const T&
operator [] (unsigned int i) const
{
return stack_[range_ - i];
}
private:
const S& stack_;
unsigned int range_;
};
]])
b4_defines_if(
[b4_output_begin([b4_dir_prefix[]stack.hh])
b4_copyright([Stack handling for Bison parsers in C++])[
/**
** \file ]b4_dir_prefix[stack.hh
** Define the ]b4_namespace_ref[::stack class.
*/
]b4_cpp_guard_open([b4_dir_prefix[]stack.hh])[
# include
]b4_namespace_open[
]b4_stack_define[
]b4_namespace_close[
]b4_cpp_guard_close([b4_dir_prefix[]stack.hh])
b4_output_end()
])
m4_popdef([b4_copyright_years])
PK lCiZe
lalr1.javanu [ PK lCiZ3s