X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b7691f15bdefaabbc246ea9b1855189a8d1cc318..95361618dee181507d53f47de2dd50c667b84007:/data/glr.c?ds=sidebyside diff --git a/data/glr.c b/data/glr.c index 44822a96..699d7304 100644 --- a/data/glr.c +++ b/data/glr.c @@ -1,22 +1,21 @@ -m4_divert(-1) -*- C -*- + -*- C -*- # GLR skeleton for Bison -# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# Copyright (C) 2002-2012 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 2 of the License, or +# 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, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301 USA +# along with this program. If not, see . m4_include(b4_pkgdatadir/[c.m4]) @@ -35,6 +34,13 @@ 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 # --------------- @@ -52,7 +58,7 @@ m4_define([b4_user_formals], # Yes, this is quite ugly... m4_define([b4_lex_param], m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl -b4_location_if([, [[YYLTYPE *], [&yylloc]]])])dnl +b4_locations_if([, [[YYLTYPE *], [&yylloc]]])])dnl m4_ifdef([b4_lex_param], [, ]b4_lex_param))) @@ -61,15 +67,15 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))) # Optional effective arguments passed to yyerror: user args plus yylloc, and # a trailing comma. m4_define([b4_yyerror_args], -[b4_pure_if([b4_location_if([yylocp, ])])dnl +[b4_pure_if([b4_locations_if([yylocp, ])])dnl m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) # b4_lyyerror_args # ---------------- -# Same as above, but on the look-ahead, hence &yylloc instead of yylocp. +# Same as above, but on the lookahead, hence &yylloc instead of yylocp. m4_define([b4_lyyerror_args], -[b4_pure_if([b4_location_if([&yylloc, ])])dnl +[b4_pure_if([b4_locations_if([&yylloc, ])])dnl m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) @@ -77,21 +83,35 @@ m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) # ------------ # Same as b4_yyerror_args, but with a leading comma. m4_define([b4_pure_args], -[b4_pure_if([b4_location_if([, yylocp])])[]b4_user_args]) +[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args]) # b4_lpure_args # ------------- -# Same as above, but on the look-ahead, hence &yylloc instead of yylocp. +# Same as above, but on the lookahead, hence &yylloc instead of yylocp. m4_define([b4_lpure_args], -[b4_pure_if([b4_location_if([, &yylloc])])[]b4_user_args]) +[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args]) + # b4_pure_formals # --------------- -# Arguments passed to yyerror: user formals plus yylocp. +# Arguments passed to yyerror: user formals plus yylocp with leading comma. m4_define([b4_pure_formals], -[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_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]) + ## ----------------- ## @@ -134,6 +154,23 @@ m4_define([b4_rhs_location], [(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)]) +## -------------- ## +## Declarations. ## +## -------------- ## + +# 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_declare_yydebug[ +]b4_percent_code_get([[requires]])[ +]b4_token_enums(b4_tokens)[ +]b4_declare_yylstype[ +]b4_c_ansi_function_decl(b4_prefix[parse], [int], b4_parse_param)[ +]b4_percent_code_get([[provides]])[]dnl +]) + ## -------------- ## ## Output files. ## @@ -141,85 +178,41 @@ m4_define([b4_rhs_location], # We do want M4 expansion after # for CPP macros. m4_changecom() -m4_divert(0)dnl -@output @output_parser_name@ -b4_copyright([Skeleton parser for GLR parsing with Bison], - [2002, 2003, 2004, 2005, 2006]) +m4_divert_push(0)dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison GLR parsers in C], + [2002-2012]) [ -/* This is the parser code for GLR (Generalized LR) parser. */ +/* C GLR parser skeleton written by Paul Hilfinger. */ ]b4_identification -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 -#define yylloc b4_prefix[]lloc]) - -dnl # b4_shared_declarations -dnl # ---------------------- -dnl # Declaration that might either go into the header (if --defines) -dnl # or open coded in the parser body. -m4_define([b4_shared_declarations], -[b4_token_enums(b4_tokens)[ +b4_percent_code_get([[top]])[ +]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]])])[ /* Copy the first part of user declarations. */ -]b4_pre_prologue[ - -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -]m4_ifdef([b4_stype], -[typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ]) -b4_stype -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@]) - YYSTYPE;], -[typedef int YYSTYPE;])[ -# define YYSTYPE_IS_DECLARED 1 -# define YYSTYPE_IS_TRIVIAL 1 -#endif +]b4_user_pre_prologue[ -#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED) -typedef struct YYLTYPE -{ -]b4_location_if([ - int first_line; - int first_column; - int last_line; - int last_column; -],[ - char yydummy; -])[ -} YYLTYPE; -# define YYLTYPE_IS_DECLARED 1 -# define YYLTYPE_IS_TRIVIAL 1 -#endif -]]) +]b4_null_define[ -m4_if(b4_defines_flag, 0, - [b4_shared_declarations], - [#include @output_header_name@])[ - -/* Enabling traces. */ -#ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ -#endif +]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[ -#endif - -/* Enabling the token table. */ -#ifndef YYTOKEN_TABLE -# define YYTOKEN_TABLE ]b4_token_table[ +# define YYERROR_VERBOSE ]b4_error_verbose_flag[ #endif /* Default (constant) value used for initialization for null @@ -230,18 +223,15 @@ m4_if(b4_defines_flag, 0, static YYSTYPE yyval_default; /* Copy the second part of user declarations. */ -]b4_post_prologue[ +]b4_user_post_prologue +b4_percent_code_get[]dnl -]/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@]) -[ -#include +[#include #include #include -#include #ifndef YY_ -# if YYENABLE_NLS +# if defined YYENABLE_NLS && YYENABLE_NLS # if ENABLE_NLS # include /* INFRINGES ON USER NAME SPACE */ # define YY_(msgid) dgettext ("bison-runtime", msgid) @@ -253,7 +243,7 @@ b4_syncline([@oline@], [@ofile@]) #endif /* Suppress unused-variable warnings by "using" E. */ -#ifndef lint +#if ! defined lint || defined __GNUC__ # define YYUSE(e) ((void) (e)) #else # define YYUSE(e) /* empty */ @@ -302,13 +292,13 @@ b4_syncline([@oline@], [@ofile@]) #ifndef __attribute__ /* This feature is available in gcc versions 2.5 and later. */ -# if (!defined (__GNUC__) || __GNUC__ < 2 \ - || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__) +# if (! defined __GNUC__ || __GNUC__ < 2 \ + || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)) # define __attribute__(Spec) /* empty */ # endif #endif -]b4_location_if([#define YYOPTIONAL_LOC(Name) Name],[ +]b4_locations_if([#define YYOPTIONAL_LOC(Name) Name],[ #ifdef __cplusplus # define YYOPTIONAL_LOC(Name) /* empty */ #else @@ -342,9 +332,8 @@ b4_syncline([@oline@], [@ofile@]) #define YYUNDEFTOK ]b4_undef_token_number[ #define YYMAXUTOK ]b4_user_token_number_max[ -#define YYTRANSLATE(YYX) \ - ((YYX <= 0) ? YYEOF : \ - (unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) +#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[] = @@ -373,7 +362,7 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] = }; #endif -#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE +#if YYDEBUG || 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[] = @@ -406,9 +395,9 @@ static const ]b4_int_type_for([b4_merger])[ yymerger[] = ]b4_merger[ }; -/* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE - doesn't specify something else to do. Zero means the default is an - error. */ +/* YYDEFACT[S] -- default reduction number in state S. Performed when + YYTABLE doesn't specify something else to do. Zero means the default + is an error. */ static const ]b4_int_type_for([b4_defact])[ yydefact[] = { ]b4_defact[ @@ -436,8 +425,7 @@ static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which - number is the opposite. If zero, do what YYDEFACT says. - If YYTABLE_NINF, syntax error. */ + number is the opposite. If YYTABLE_NINF, syntax error. */ #define YYTABLE_NINF ]b4_table_ninf[ static const ]b4_int_type_for([b4_table])[ yytable[] = { @@ -476,9 +464,6 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = }; -/* Prevent warning if -Wmissing-prototypes. */ -]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[ - /* Error token number */ #define YYTERROR 1 @@ -486,35 +471,35 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = If N is 0, then set CURRENT to the empty location which ends the previous symbol: RHS[0] (always defined). */ -]b4_location_if([[ +]b4_locations_if([[ #define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc) #ifndef YYLLOC_DEFAULT -# define YYLLOC_DEFAULT(Current, Rhs, N) \ - do \ - if (YYID (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; \ - } \ +# define YYLLOC_DEFAULT(Current, Rhs, N) \ + do \ + if (YYID (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 (YYID (0)) /* 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. */ -# define YY_LOCATION_PRINT(File, Loc) \ - fprintf (File, "%d.%d-%d.%d", \ - (Loc).first_line, (Loc).first_column, \ - (Loc).last_line, (Loc).last_column) +# define YY_LOCATION_PRINT(File, Loc) \ + fprintf (File, "%d.%d-%d.%d", \ + (Loc).first_line, (Loc).first_column, \ + (Loc).last_line, (Loc).last_column) #endif ]],[ #ifndef YYLLOC_DEFAULT @@ -545,9 +530,8 @@ m4_if(b4_prefix[], [yy], [], #define b4_prefix[]char yychar #define b4_prefix[]lval yylval #define b4_prefix[]lloc yylloc])], -[YYSTYPE yylval; - -YYLTYPE yylloc; +[YYSTYPE yylval;]b4_locations_if([[ +YYLTYPE yylloc;]])[ int yynerrs; int yychar;])[ @@ -557,33 +541,32 @@ static const int YYEMPTY = -2; typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG; -#define YYCHK(YYE) \ - do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \ +#define YYCHK(YYE) \ + do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \ while (YYID (0)) #if YYDEBUG -#if ! defined (YYFPRINTF) +# ifndef YYFPRINTF # define YYFPRINTF fprintf -#endif +# endif -# define YYDPRINTF(Args) \ -do { \ - if (yydebug) \ - YYFPRINTF Args; \ +# define YYDPRINTF(Args) \ +do { \ + if (yydebug) \ + YYFPRINTF Args; \ } while (YYID (0)) ]b4_yy_symbol_print_generate([b4_c_ansi_function_def])[ -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ -do { \ - if (yydebug) \ - { \ - YYFPRINTF (stderr, "%s ", Title); \ - yy_symbol_print (stderr, Type, \ - Value]b4_location_if([, Location])[]b4_user_args[); \ - YYFPRINTF (stderr, "\n"); \ - } \ +# 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 (YYID (0)) /* Nonzero means print parse trace. It is left uninitialized so that @@ -598,7 +581,7 @@ int yydebug; #endif /* !YYDEBUG */ /* YYINITDEPTH -- initial size of the parser's stacks. */ -#ifndef YYINITDEPTH +#ifndef YYINITDEPTH # define YYINITDEPTH ]b4_stack_depth_init[ #endif @@ -621,9 +604,9 @@ int yydebug; #define YYHEADROOM 2 #ifndef YYSTACKEXPANDABLE -# if (! defined (__cplusplus) \ - || (]b4_location_if([[defined (YYLTYPE_IS_TRIVIAL) && YYLTYPE_IS_TRIVIAL \ - && ]])[defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)) +# if (! defined __cplusplus \ + || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \ + && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)) # define YYSTACKEXPANDABLE 1 # else # define YYSTACKEXPANDABLE 0 @@ -631,16 +614,16 @@ int yydebug; #endif #if YYSTACKEXPANDABLE -# define YY_RESERVE_GLRSTACK(Yystack) \ - do { \ - if (Yystack->yyspaceLeft < YYHEADROOM) \ - yyexpandGLRStack (Yystack); \ +# define YY_RESERVE_GLRSTACK(Yystack) \ + do { \ + if (Yystack->yyspaceLeft < YYHEADROOM) \ + yyexpandGLRStack (Yystack); \ } while (YYID (0)) #else -# define YY_RESERVE_GLRSTACK(Yystack) \ - do { \ - if (Yystack->yyspaceLeft < YYHEADROOM) \ - yyMemoryExhausted (Yystack); \ +# define YY_RESERVE_GLRSTACK(Yystack) \ + do { \ + if (Yystack->yyspaceLeft < YYHEADROOM) \ + yyMemoryExhausted (Yystack); \ } while (YYID (0)) #endif @@ -648,7 +631,7 @@ int yydebug; #if YYERROR_VERBOSE # ifndef yystpcpy -# if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE) +# 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 @@ -684,27 +667,27 @@ yytnamerr (char *yyres, const char *yystr) 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; - } + 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: ; } @@ -754,9 +737,9 @@ struct yyGLRState { yySemanticOption* yyfirstVal; /** Semantic value for this state. */ YYSTYPE yysval; - } yysemantics; + } yysemantics;]b4_locations_if([[ /** Source location for this state. */ - YYLTYPE yyloc; + YYLTYPE yyloc;]])[ }; struct yyGLRStateSet { @@ -778,8 +761,8 @@ struct yySemanticOption { yyGLRState* yystate; /** The lookahead for this reduction. */ int yyrawchar; - YYSTYPE yyval; - YYLTYPE yyloc; + 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; @@ -794,16 +777,15 @@ union yyGLRStackItem { struct yyGLRStack { int yyerrState; -]b4_location_if([[ /* To compute the location of the error token. */ +]b4_locations_if([[ /* To compute the location of the error token. */ yyGLRStackItem yyerror_range[3];]])[ ]b4_pure_if( [ int yyerrcnt; int yyrawchar; - YYSTYPE yyval; - YYLTYPE yyloc; + YYSTYPE yyval;]b4_locations_if([[ + YYLTYPE yyloc;]])[ ])[ - yySymbol* yytokenp; YYJMP_BUF yyexception_buffer; yyGLRStackItem* yyitems; yyGLRStackItem* yynextFree; @@ -822,7 +804,7 @@ static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) { - if (yymsg != NULL) + if (yymsg != YY_NULL) yyerror (]b4_yyerror_args[yymsg); YYLONGJMP (yystackp->yyexception_buffer, 1); } @@ -854,15 +836,14 @@ static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__)); static void yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1) { - yyGLRState* s; int i; - s = yyvsp[yylow0].yystate.yypred; + yyGLRState *s = yyvsp[yylow0].yystate.yypred; for (i = yylow0-1; i >= yylow1; i -= 1) { YYASSERT (s->yyresolved); yyvsp[i].yystate.yyresolved = yytrue; - yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval; - yyvsp[i].yystate.yyloc = s->yyloc; + yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;]b4_locations_if([[ + yyvsp[i].yystate.yyloc = s->yyloc;]])[ s = yyvsp[i].yystate.yypred = s->yypred; } } @@ -890,13 +871,11 @@ yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal) * yyerr for YYERROR, yyabort for YYABORT. */ /*ARGSUSED*/ static YYRESULTTAG yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, - YYSTYPE* yyvalp, - YYLTYPE* YYOPTIONAL_LOC (yylocp), - yyGLRStack* yystackp - ]b4_user_formals[) + yyGLRStack* yystackp, + YYSTYPE* yyvalp]b4_locuser_formals[) { yybool yynormal __attribute__ ((__unused__)) = - (yystackp->yysplitPoint == NULL); + (yystackp->yysplitPoint == YY_NULL); int yylow; ]b4_parse_param_use[]dnl [# undef yyerrok @@ -908,29 +887,27 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, # undef YYERROR # define YYERROR return yyerrok, yyerr # undef YYRECOVERING -# define YYRECOVERING (yystackp->yyerrState != 0) +# define YYRECOVERING() (yystackp->yyerrState != 0) # undef yyclearin -# define yyclearin (yychar = *(yystackp->yytokenp) = YYEMPTY) +# define yyclearin (yychar = YYEMPTY) # undef YYFILL # define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal) # undef YYBACKUP -# define YYBACKUP(Token, Value) \ +# define YYBACKUP(Token, Value) \ return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")), \ - yyerrok, yyerr + yyerrok, yyerr yylow = 1; if (yyrhslen == 0) *yyvalp = yyval_default; else - *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval; - YYLLOC_DEFAULT (*yylocp, yyvsp - yyrhslen, yyrhslen); -]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = *yylocp; + *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_actions -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@])[ + ]b4_user_actions[ default: break; } @@ -958,7 +935,7 @@ yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1) } } - /* Bison grammar-table manipulation. */ + /* Bison grammar-table manipulation. */ ]b4_yydestruct_generate([b4_c_ansi_function_def])[ @@ -974,29 +951,32 @@ yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[) { if (yys->yyresolved) yydestruct (yymsg, yystos[yys->yylrState], - &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[); + &yys->yysemantics.yysval]b4_locuser_args([&yys->yyloc])[); else { #if YYDEBUG if (yydebug) - { - YYFPRINTF (stderr, "%s unresolved ", yymsg); - yy_symbol_print (stderr, yystos[yys->yylrState], - NULL]b4_location_if([, &yys->yyloc])[]b4_user_args[); - YYFPRINTF (stderr, "\n"); - } + { + if (yys->yysemantics.yyfirstVal) + YYFPRINTF (stderr, "%s unresolved ", yymsg); + else + YYFPRINTF (stderr, "%s incomplete ", yymsg); + yy_symbol_print (stderr, yystos[yys->yylrState], + YY_NULL]b4_locuser_args([&yys->yyloc])[); + YYFPRINTF (stderr, "\n"); + } #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[); - } + { + 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[); + } } } @@ -1007,17 +987,15 @@ yylhsNonterm (yyRuleNum yyrule) return yyr1[yyrule]; } -#define yyis_pact_ninf(yystate) \ - ]m4_if(m4_eval(b4_pact_ninf < b4_pact_min), [1], - [0], - [((yystate) == YYPACT_NINF)])[ +#define yypact_value_is_default(yystate) \ + ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[ /** True iff LR state STATE has only a default reduction (regardless * of token). */ static inline yybool yyisDefaultedState (yyStateNum yystate) { - return yyis_pact_ninf (yypact[yystate]); + return yypact_value_is_default (yypact[yystate]); } /** The default reduction for STATE, assuming it has one. */ @@ -1027,10 +1005,8 @@ yydefaultAction (yyStateNum yystate) return yydefact[yystate]; } -#define yyis_table_ninf(yytable_value) \ - ]m4_if(m4_eval(b4_table_ninf < b4_table_min), [1], - [YYID (0)], - [((yytable_value) == YYTABLE_NINF)])[ +#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 @@ -1042,15 +1018,16 @@ yydefaultAction (yyStateNum yystate) */ static inline void yygetLRActions (yyStateNum yystate, int yytoken, - int* yyaction, const short int** yyconflicts) + int* yyaction, const short int** yyconflicts) { int yyindex = yypact[yystate] + yytoken; - if (yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken) + if (yypact_value_is_default (yypact[yystate]) + || yyindex < 0 || YYLAST < yyindex || yycheck[yyindex] != yytoken) { *yyaction = -yydefact[yystate]; *yyconflicts = yyconfl; } - else if (! yyis_table_ninf (yytable[yyindex])) + else if (! yytable_value_is_error (yytable[yyindex])) { *yyaction = yytable[yyindex]; *yyconflicts = yyconfl + yyconflp[yyindex]; @@ -1085,7 +1062,7 @@ yyisErrorAction (int yyaction) return yyaction == 0; } - /* GLRStates */ + /* GLRStates */ /** Return a fresh GLRStackItem. Callers should call * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient @@ -1103,11 +1080,11 @@ yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState) /** Add a new semantic action that will execute the action for rule * RULENUM on the semantic values in RHS to the list of - * alternative actions for STATE. Assumes that RHS comes from + * alternative actions for STATE. Assumes that RHS comes from * stack #K of *STACKP. */ static void yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, - yyGLRState* rhs, yyRuleNum yyrule) + yyGLRState* rhs, yyRuleNum yyrule) { yySemanticOption* yynewOption = &yynewGLRStackItem (yystackp, yyfalse)->yyoption; @@ -1116,8 +1093,8 @@ yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, if (yystackp->yytops.yylookaheadNeeds[yyk]) { yynewOption->yyrawchar = yychar; - yynewOption->yyval = yylval; - yynewOption->yyloc = yylloc; + yynewOption->yyval = yylval;]b4_locations_if([ + yynewOption->yyloc = yylloc;])[ } else yynewOption->yyrawchar = YYEMPTY; @@ -1127,7 +1104,7 @@ yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, YY_RESERVE_GLRSTACK (yystackp); } - /* GLRStacks */ + /* GLRStacks */ /** Initialize SET to a singleton set containing an empty stack. */ static yybool @@ -1138,7 +1115,7 @@ yyinitStateSet (yyGLRStateSet* yyset) yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]); if (! yyset->yystates) return yyfalse; - yyset->yystates[0] = NULL; + yyset->yystates[0] = YY_NULL; yyset->yylookaheadNeeds = (yybool*) YYMALLOC (16 * sizeof yyset->yylookaheadNeeds[0]); if (! yyset->yylookaheadNeeds) @@ -1168,8 +1145,8 @@ yyinitGLRStack (yyGLRStack* yystackp, size_t yysize) if (!yystackp->yyitems) return yyfalse; yystackp->yynextFree = yystackp->yyitems; - yystackp->yysplitPoint = NULL; - yystackp->yylastDeleted = NULL; + yystackp->yysplitPoint = YY_NULL; + yystackp->yylastDeleted = YY_NULL; return yyinitStateSet (&yystackp->yytops); } @@ -1188,10 +1165,10 @@ yyexpandGLRStack (yyGLRStack* yystackp) { yyGLRStackItem* yynewItems; yyGLRStackItem* yyp0, *yyp1; - size_t yysize, yynewSize; + size_t yynewSize; size_t yyn; - yysize = yystackp->yynextFree - yystackp->yyitems; - if (YYMAXDEPTH <= yysize) + size_t yysize = yystackp->yynextFree - yystackp->yyitems; + if (YYMAXDEPTH - YYHEADROOM < yysize) yyMemoryExhausted (yystackp); yynewSize = 2*yysize; if (YYMAXDEPTH < yynewSize) @@ -1205,35 +1182,35 @@ yyexpandGLRStack (yyGLRStack* yystackp) { *yyp1 = *yyp0; if (*(yybool *) yyp0) - { - yyGLRState* yys0 = &yyp0->yystate; - yyGLRState* yys1 = &yyp1->yystate; - if (yys0->yypred != NULL) - yys1->yypred = - YYRELOC (yyp0, yyp1, yys0->yypred, yystate); - if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL) - yys1->yysemantics.yyfirstVal = - YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption); - } + { + yyGLRState* yys0 = &yyp0->yystate; + yyGLRState* yys1 = &yyp1->yystate; + if (yys0->yypred != YY_NULL) + yys1->yypred = + YYRELOC (yyp0, yyp1, yys0->yypred, yystate); + if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULL) + yys1->yysemantics.yyfirstVal = + YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption); + } else - { - yySemanticOption* yyv0 = &yyp0->yyoption; - yySemanticOption* yyv1 = &yyp1->yyoption; - if (yyv0->yystate != NULL) - yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate); - if (yyv0->yynext != NULL) - yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); - } + { + yySemanticOption* yyv0 = &yyp0->yyoption; + yySemanticOption* yyv1 = &yyp1->yyoption; + if (yyv0->yystate != YY_NULL) + yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate); + if (yyv0->yynext != YY_NULL) + yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); + } } - if (yystackp->yysplitPoint != NULL) + if (yystackp->yysplitPoint != YY_NULL) yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems, - yystackp->yysplitPoint, yystate); + yystackp->yysplitPoint, yystate); for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1) - if (yystackp->yytops.yystates[yyn] != NULL) + if (yystackp->yytops.yystates[yyn] != YY_NULL) yystackp->yytops.yystates[yyn] = - YYRELOC (yystackp->yyitems, yynewItems, - yystackp->yytops.yystates[yyn], yystate); + YYRELOC (yystackp->yyitems, yynewItems, + yystackp->yytops.yystates[yyn], yystate); YYFREE (yystackp->yyitems); yystackp->yyitems = yynewItems; yystackp->yynextFree = yynewItems + yysize; @@ -1254,7 +1231,7 @@ yyfreeGLRStack (yyGLRStack* yystackp) static inline void yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys) { - if (yystackp->yysplitPoint != NULL && yystackp->yysplitPoint > yys) + if (yystackp->yysplitPoint != YY_NULL && yystackp->yysplitPoint > yys) yystackp->yysplitPoint = yys; } @@ -1262,9 +1239,9 @@ yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys) static inline void yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk) { - if (yystackp->yytops.yystates[yyk] != NULL) + if (yystackp->yytops.yystates[yyk] != YY_NULL) yystackp->yylastDeleted = yystackp->yytops.yystates[yyk]; - yystackp->yytops.yystates[yyk] = NULL; + yystackp->yytops.yystates[yyk] = YY_NULL; } /** Undelete the last stack that was marked as deleted. Can only be @@ -1273,12 +1250,12 @@ yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk) static void yyundeleteLastStack (yyGLRStack* yystackp) { - if (yystackp->yylastDeleted == NULL || yystackp->yytops.yysize != 0) + if (yystackp->yylastDeleted == YY_NULL || 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 = NULL; + yystackp->yylastDeleted = YY_NULL; } static inline void @@ -1288,31 +1265,31 @@ yyremoveDeletes (yyGLRStack* yystackp) yyi = yyj = 0; while (yyj < yystackp->yytops.yysize) { - if (yystackp->yytops.yystates[yyi] == NULL) - { - if (yyi == yyj) - { - YYDPRINTF ((stderr, "Removing dead stacks.\n")); - } - yystackp->yytops.yysize -= 1; - } + if (yystackp->yytops.yystates[yyi] == YY_NULL) + { + 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; - } + { + 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; } } @@ -1321,8 +1298,8 @@ yyremoveDeletes (yyGLRStack* yystackp) * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */ static inline void yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, - size_t yyposn, - YYSTYPE* yyvalp, YYLTYPE* yylocp) + size_t yyposn, + YYSTYPE* yyvalp]b4_locations_if([, YYLTYPE* yylocp])[) { yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; @@ -1330,8 +1307,8 @@ yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, yynewState->yyposn = yyposn; yynewState->yyresolved = yytrue; yynewState->yypred = yystackp->yytops.yystates[yyk]; - yynewState->yysemantics.yysval = *yyvalp; - yynewState->yyloc = *yylocp; + yynewState->yysemantics.yysval = *yyvalp;]b4_locations_if([ + yynewState->yyloc = *yylocp;])[ yystackp->yytops.yystates[yyk] = yynewState; YY_RESERVE_GLRSTACK (yystackp); @@ -1342,7 +1319,7 @@ yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, * semantic value of YYRHS under the action for YYRULE. */ static inline void yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, - size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule) + size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule) { yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; @@ -1350,7 +1327,7 @@ yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, yynewState->yyposn = yyposn; yynewState->yyresolved = yyfalse; yynewState->yypred = yystackp->yytops.yystates[yyk]; - yynewState->yysemantics.yyfirstVal = NULL; + yynewState->yysemantics.yyfirstVal = YY_NULL; yystackp->yytops.yystates[yyk] = yynewState; /* Invokes YY_RESERVE_GLRSTACK. */ @@ -1365,11 +1342,11 @@ yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, * for userAction. */ static inline YYRESULTTAG yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, - YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) + YYSTYPE* yyvalp]b4_locuser_formals[) { int yynrhs = yyrhsLength (yyrule); - if (yystackp->yysplitPoint == NULL) + if (yystackp->yysplitPoint == YY_NULL) { /* Standard special case: single stack. */ yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; @@ -1377,8 +1354,8 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, yystackp->yynextFree -= yynrhs; yystackp->yyspaceLeft += yynrhs; yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate; - return yyuserAction (yyrule, yynrhs, rhs, - yyvalp, yylocp, yystackp]b4_user_args[); + return yyuserAction (yyrule, yynrhs, rhs, yystackp, + yyvalp]b4_locuser_args[); } else { @@ -1390,29 +1367,29 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, yyGLRState* yys; yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred - = yystackp->yytops.yystates[yyk];]b4_location_if([[ + = yystackp->yytops.yystates[yyk];]b4_locations_if([[ if (yynrhs == 0) - /* Set default location. */ - yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[ + /* Set default location. */ + yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[ for (yyi = 0; yyi < yynrhs; yyi += 1) - { - yys = yys->yypred; - YYASSERT (yys); - } + { + yys = yys->yypred; + YYASSERT (yys); + } yyupdateSplit (yystackp, yys); yystackp->yytops.yystates[yyk] = yys; return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, - yyvalp, yylocp, yystackp]b4_user_args[); + yystackp, yyvalp]b4_locuser_args[); } } #if !YYDEBUG # define YY_REDUCE_PRINT(Args) #else -# define YY_REDUCE_PRINT(Args) \ -do { \ - if (yydebug) \ - yy_reduce_print Args; \ +# define YY_REDUCE_PRINT(Args) \ +do { \ + if (yydebug) \ + yy_reduce_print Args; \ } while (YYID (0)) /*----------------------------------------------------------. @@ -1421,29 +1398,29 @@ do { \ /*ARGSUSED*/ static inline void yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, - YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) + YYSTYPE* yyvalp]b4_locuser_formals[) { int yynrhs = yyrhsLength (yyrule); yybool yynormal __attribute__ ((__unused__)) = - (yystackp->yysplitPoint == NULL); + (yystackp->yysplitPoint == YY_NULL); yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; int yylow = 1; int yyi; - YYUSE (yyvalp); - YYUSE (yylocp); + YYUSE (yyvalp);]b4_locations_if([ + YYUSE (yylocp);])[ ]b4_parse_param_use[]dnl [ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n", - (unsigned long int) yyk, yyrule - 1, - (unsigned long int) yyrline[yyrule]); + (unsigned long int) yyk, yyrule - 1, + (unsigned long int) yyrline[yyrule]); /* The symbols being reduced. */ for (yyi = 0; yyi < yynrhs; yyi++) { - fprintf (stderr, " $%d = ", yyi + 1); + YYFPRINTF (stderr, " $%d = ", yyi + 1); yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], - &]b4_rhs_value(yynrhs, yyi + 1)[ - ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl - b4_user_args[); - fprintf (stderr, "\n"); + &]b4_rhs_value(yynrhs, yyi + 1)[ + ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl + b4_user_args[); + YYFPRINTF (stderr, "\n"); } } #endif @@ -1461,23 +1438,22 @@ yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, */ static inline YYRESULTTAG yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, - yybool yyforceEval]b4_user_formals[) + yybool yyforceEval]b4_user_formals[) { size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn; - if (yyforceEval || yystackp->yysplitPoint == NULL) + if (yyforceEval || yystackp->yysplitPoint == YY_NULL) { - YYSTYPE yysval; - YYLTYPE yyloc; + YYSTYPE yysval;]b4_locations_if([ + YYLTYPE yyloc;])[ - YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[)); - YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval, - &yyloc]b4_user_args[)); + YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[)); + YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[)); YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc); yyglrShift (yystackp, yyk, - yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState, - yylhsNonterm (yyrule)), - yyposn, &yysval, &yyloc); + yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState, + yylhsNonterm (yyrule)), + yyposn, &yysval]b4_locations_if([, &yyloc])[); } else { @@ -1487,35 +1463,35 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, yyStateNum yynewLRState; for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule); - 0 < yyn; yyn -= 1) - { - yys = yys->yypred; - YYASSERT (yys); - } + 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)); + "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] != NULL) - { - yyGLRState* yyp, *yysplit = yystackp->yysplitPoint; - 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; - } - } + if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULL) + { + 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); } @@ -1525,7 +1501,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, static size_t yysplitStack (yyGLRStack* yystackp, size_t yyk) { - if (yystackp->yysplitPoint == NULL) + if (yystackp->yysplitPoint == YY_NULL) { YYASSERT (yyk == 0); yystackp->yysplitPoint = yystackp->yytops.yystates[yyk]; @@ -1535,27 +1511,27 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk) yyGLRState** yynewStates; yybool* yynewLookaheadNeeds; - yynewStates = NULL; - + yynewStates = YY_NULL; + if (yystackp->yytops.yycapacity - > (YYSIZEMAX / (2 * sizeof yynewStates[0]))) - yyMemoryExhausted (yystackp); + > (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 == NULL) - yyMemoryExhausted (yystackp); + (yyGLRState**) YYREALLOC (yystackp->yytops.yystates, + (yystackp->yytops.yycapacity + * sizeof yynewStates[0])); + if (yynewStates == YY_NULL) + yyMemoryExhausted (yystackp); yystackp->yytops.yystates = yynewStates; yynewLookaheadNeeds = - (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds, - (yystackp->yytops.yycapacity - * sizeof yynewLookaheadNeeds[0])); - if (yynewLookaheadNeeds == NULL) - yyMemoryExhausted (yystackp); + (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds, + (yystackp->yytops.yycapacity + * sizeof yynewLookaheadNeeds[0])); + if (yynewLookaheadNeeds == YY_NULL) + yyMemoryExhausted (yystackp); yystackp->yytops.yylookaheadNeeds = yynewLookaheadNeeds; } yystackp->yytops.yystates[yystackp->yytops.yysize] @@ -1577,11 +1553,11 @@ yyidenticalOptions (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->yyposn != yys1->yyposn) - return yyfalse; + yyn = yyrhsLength (yyy0->yyrule); + yyn > 0; + yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) + if (yys0->yyposn != yys1->yyposn) + return yyfalse; return yytrue; } else @@ -1601,43 +1577,41 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) { if (yys0 == yys1) - break; + break; else if (yys0->yyresolved) - { - yys1->yyresolved = yytrue; - yys1->yysemantics.yysval = yys0->yysemantics.yysval; - } + { + yys1->yyresolved = yytrue; + yys1->yysemantics.yysval = yys0->yysemantics.yysval; + } else if (yys1->yyresolved) - { - yys0->yyresolved = yytrue; - yys0->yysemantics.yysval = yys1->yysemantics.yysval; - } + { + yys0->yyresolved = yytrue; + yys0->yysemantics.yysval = yys1->yysemantics.yysval; + } else - { - yySemanticOption** yyz0p; - yySemanticOption* yyz1; - yyz0p = &yys0->yysemantics.yyfirstVal; - yyz1 = yys1->yysemantics.yyfirstVal; - while (YYID (yytrue)) - { - if (yyz1 == *yyz0p || yyz1 == NULL) - break; - else if (*yyz0p == NULL) - { - *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; - } + { + yySemanticOption** yyz0p = &yys0->yysemantics.yyfirstVal; + yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal; + while (YYID (yytrue)) + { + if (yyz1 == *yyz0p || yyz1 == YY_NULL) + break; + else if (*yyz0p == YY_NULL) + { + *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; + } } } @@ -1653,9 +1627,9 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1) if (p0 == p1) { if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1]) - return 0; + return 0; else - return 1; + return 1; } if (p0 == 0 || p1 == 0) return 0; @@ -1667,64 +1641,67 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1) } static YYRESULTTAG yyresolveValue (yyGLRState* yys, - yyGLRStack* yystackp, YYSTYPE* yyvalp, - YYLTYPE* yylocp]b4_user_formals[); + yyGLRStack* yystackp]b4_user_formals[); + +/** Resolve the previous N states starting at and including state S. 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[) + yyGLRStack* yystackp]b4_user_formals[) { if (0 < yyn) { YYASSERT (yys->yypred); YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[)); if (! yys->yyresolved) - { - YYSTYPE yysval; - YYRESULTTAG yyflag = yyresolveValue (yys, yystackp, &yysval, - &yys->yyloc]b4_user_args[); - if (yyflag != yyok) - { - yys->yysemantics.yyfirstVal = NULL; - return yyflag; - } - yys->yysemantics.yysval = yysval; - yys->yyresolved = yytrue; - } + YYCHK (yyresolveValue (yys, yystackp]b4_user_args[)); } return yyok; } +/** Resolve the states for the RHS of OPT, perform its user action, and return + * the semantic value and location. 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, YYLTYPE* yylocp]b4_user_formals[) + YYSTYPE* yyvalp]b4_locuser_formals[) { yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; - int yynrhs; - int yychar_current; - YYSTYPE yylval_current; - YYLTYPE yylloc_current; - YYRESULTTAG yyresult; - - yynrhs = yyrhsLength (yyopt->yyrule); - YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[)); - yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[ + 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;]])[ - yychar_current = yychar; - yylval_current = yylval; - yylloc_current = yylloc; - yychar = yyopt->yyrawchar; - yylval = yyopt->yyval; - yylloc = yyopt->yyloc; - yyresult = yyuserAction (yyopt->yyrule, yynrhs, - yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, - yyvalp, yylocp, yystackp]b4_user_args[); - yychar = yychar_current; - yylval = yylval_current; - yylloc = yylloc_current; - return yyresult; + { + 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 YYDEBUG @@ -1734,12 +1711,12 @@ yyreportTree (yySemanticOption* yyx, int yyindent) int yynrhs = yyrhsLength (yyx->yyrule); int yyi; yyGLRState* yys; - yyGLRState* yystates[YYMAXRHS]; + 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 == NULL) + if (yys == YY_NULL) { yyleftmost_state.yyposn = 0; yystates[0] = &yyleftmost_state; @@ -1749,38 +1726,35 @@ yyreportTree (yySemanticOption* yyx, int yyindent) if (yyx->yystate->yyposn < yys->yyposn + 1) YYFPRINTF (stderr, "%*s%s -> \n", - yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule); + yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), + yyx->yyrule - 1); else YYFPRINTF (stderr, "%*s%s -> \n", - yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule, (unsigned long int) (yys->yyposn + 1), - (unsigned long int) yyx->yystate->yyposn); + 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 (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); - else - YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", - yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), - (unsigned long int) (yystates[yyi - 1]->yyposn + 1), - (unsigned long int) yystates[yyi]->yyposn); - } + { + if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn) + YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", + yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); + else + YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", + yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), + (unsigned long int) (yystates[yyi - 1]->yyposn + 1), + (unsigned long int) yystates[yyi]->yyposn); + } else - yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2); + yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2); } } #endif -static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystackp]b4_pure_formals[) - __attribute__ ((__noreturn__)); -/*ARGSUSED*/ static void -yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystackp]b4_pure_formals[) +/*ARGSUSED*/ static YYRESULTTAG +yyreportAmbiguity (yySemanticOption* yyx0, + yySemanticOption* yyx1]b4_pure_formals[) { YYUSE (yyx0); YYUSE (yyx1); @@ -1793,101 +1767,171 @@ yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, yyreportTree (yyx1, 2); YYFPRINTF (stderr, "\n"); #endif - yyFail (yystackp][]b4_pure_args[, YY_("syntax is ambiguous")); -} + yyerror (]b4_yyerror_args[YY_("syntax is ambiguous")); + return yyabort; +}]b4_locations_if([[ + +/** Starting at and including state S1, resolve the location for each of the + * previous N1 states that is unresolved. 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_NULL); + 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 S, perform the indicated - * actions, and return the result. */ + * actions, and set the semantic value of S. If result != yyok, the chain of + * semantic options in S has been cleared instead or it has been left + * unmodified except that redundant options may have been removed. Regardless + * of whether result = yyok, S has been left with consistent data so that + * yydestroyGLRState can be invoked if necessary. */ static YYRESULTTAG -yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp, YYSTYPE* yyvalp, - YYLTYPE* yylocp]b4_user_formals[) +yyresolveValue (yyGLRState* yys, yyGLRStack* yystackp]b4_user_formals[) { yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal; - yySemanticOption* yybest; + yySemanticOption* yybest = yyoptionList; yySemanticOption** yypp; - yybool yymerge; + yybool yymerge = yyfalse; + YYSTYPE yysval; + YYRESULTTAG yyflag;]b4_locations_if([ + YYLTYPE *yylocp = &yys->yyloc;])[ - yybest = yyoptionList; - yymerge = yyfalse; - for (yypp = &yyoptionList->yynext; *yypp != NULL; ) + for (yypp = &yyoptionList->yynext; *yypp != YY_NULL; ) { yySemanticOption* yyp = *yypp; if (yyidenticalOptions (yybest, yyp)) - { - yymergeOptionSets (yybest, yyp); - *yypp = yyp->yynext; - } + { + yymergeOptionSets (yybest, yyp); + *yypp = yyp->yynext; + } else - { - switch (yypreference (yybest, yyp)) - { - case 0: - yyreportAmbiguity (yybest, yyp, yystackp]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; - } + { + 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]; - YYCHK (yyresolveAction (yybest, yystackp, yyvalp, yylocp]b4_user_args[)); - for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext) - { - if (yyprec == yydprec[yyp->yyrule]) - { - YYSTYPE yyval1; - YYLTYPE yydummy; - YYRESULTTAG yyflag = yyresolveAction (yyp, yystackp, &yyval1, - &yydummy]b4_user_args[); - if (yyflag != yyok) - { - yydestruct ("Cleanup: discarding merged value", - yystos[yys->yylrState], - yyvalp]b4_location_if([, yylocp])[]b4_user_args[); - return yyflag; - } - yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1); - } - } - return yyok; + yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[); + if (yyflag == yyok) + for (yyp = yybest->yynext; yyp != YY_NULL; 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 - return yyresolveAction (yybest, yystackp, yyvalp, yylocp]b4_user_args[); + yys->yysemantics.yyfirstVal = YY_NULL; + return yyflag; } static YYRESULTTAG yyresolveStack (yyGLRStack* yystackp]b4_user_formals[) { - if (yystackp->yysplitPoint != NULL) + if (yystackp->yysplitPoint != YY_NULL) { yyGLRState* yys; int yyn; for (yyn = 0, yys = yystackp->yytops.yystates[0]; - yys != yystackp->yysplitPoint; - yys = yys->yypred, yyn += 1) - continue; + yys != yystackp->yysplitPoint; + yys = yys->yypred, yyn += 1) + continue; YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp - ]b4_user_args[)); + ]b4_user_args[)); } return yyok; } @@ -1897,10 +1941,10 @@ yycompressStack (yyGLRStack* yystackp) { yyGLRState* yyp, *yyq, *yyr; - if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == NULL) + if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_NULL) return; - for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL; + for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = YY_NULL; yyp != yystackp->yysplitPoint; yyr = yyp, yyp = yyq, yyq = yyp->yypred) yyp->yypred = yyr; @@ -1908,10 +1952,10 @@ yycompressStack (yyGLRStack* yystackp) yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems; yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1; yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems; - yystackp->yysplitPoint = NULL; - yystackp->yylastDeleted = NULL; + yystackp->yysplitPoint = YY_NULL; + yystackp->yylastDeleted = YY_NULL; - while (yyr != NULL) + while (yyr != YY_NULL) { yystackp->yynextFree->yystate = *yyr; yyr = yyr->yypred; @@ -1924,71 +1968,81 @@ yycompressStack (yyGLRStack* yystackp) static YYRESULTTAG yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, - size_t yyposn]b4_pure_formals[) + size_t yyposn]b4_pure_formals[) { int yyaction; const short int* yyconflicts; yyRuleNum yyrule; - yySymbol* const yytokenp = yystackp->yytokenp; - while (yystackp->yytops.yystates[yyk] != NULL) + while (yystackp->yytops.yystates[yyk] != YY_NULL) { yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState; YYDPRINTF ((stderr, "Stack %lu Entering state %d\n", - (unsigned long int) yyk, yystate)); + (unsigned long int) yyk, yystate)); YYASSERT (yystate != YYFINAL); if (yyisDefaultedState (yystate)) - { - yyrule = yydefaultAction (yystate); - if (yyrule == 0) - { - YYDPRINTF ((stderr, "Stack %lu dies.\n", - (unsigned long int) yyk)); - yymarkStackDeleted (yystackp, yyk); - return yyok; - } - YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[)); - } + { + yyrule = yydefaultAction (yystate); + if (yyrule == 0) + { + YYDPRINTF ((stderr, "Stack %lu dies.\n", + (unsigned long int) yyk)); + yymarkStackDeleted (yystackp, yyk); + return yyok; + } + YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[)); + } else - { - yystackp->yytops.yylookaheadNeeds[yyk] = yytrue; - if (*yytokenp == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - *yytokenp = YYTRANSLATE (yychar); - YY_SYMBOL_PRINT ("Next token is", *yytokenp, &yylval, &yylloc); - } - yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts); - - while (*yyconflicts != 0) - { - size_t yynewStack = yysplitStack (yystackp, yyk); - YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n", - (unsigned long int) yynewStack, - (unsigned long int) yyk)); - YYCHK (yyglrReduce (yystackp, yynewStack, - *yyconflicts, yyfalse]b4_user_args[)); - YYCHK (yyprocessOneStack (yystackp, yynewStack, - yyposn]b4_pure_args[)); - 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 - YYCHK (yyglrReduce (yystackp, yyk, -yyaction, - yyfalse]b4_user_args[)); - } + { + yySymbol yytoken; + yystackp->yytops.yylookaheadNeeds[yyk] = yytrue; + if (yychar == YYEMPTY) + { + YYDPRINTF ((stderr, "Reading a token: ")); + yychar = YYLEX; + } + + 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) + { + size_t yynewStack = yysplitStack (yystackp, yyk); + YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n", + (unsigned long int) yynewStack, + (unsigned long int) yyk)); + YYCHK (yyglrReduce (yystackp, yynewStack, + *yyconflicts, yyfalse]b4_user_args[)); + YYCHK (yyprocessOneStack (yystackp, yynewStack, + yyposn]b4_pure_args[)); + 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 + YYCHK (yyglrReduce (yystackp, yyk, -yyaction, + yyfalse]b4_user_args[)); + } } return yyok; } @@ -1996,111 +2050,138 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, /*ARGSUSED*/ static void yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { - if (yystackp->yyerrState == 0) + 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_NULL, yytokenName (yytoken)); + size_t yysize = yysize0; + size_t yysize1; + yybool yysize_overflow = yyfalse; + char* yymsg = YY_NULL; + enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + /* Internationalized format string. */ + const char *yyformat = YY_NULL; + /* 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) { -#if YYERROR_VERBOSE - yySymbol* const yytokenp = yystackp->yytokenp; - int yyn; - yyn = yypact[yystackp->yytops.yystates[0]->yylrState]; - if (YYPACT_NINF < yyn && yyn < YYLAST) - { - size_t yysize0 = yytnamerr (NULL, yytokenName (*yytokenp)); - size_t yysize = yysize0; - size_t yysize1; - yybool yysize_overflow = yyfalse; - char* yymsg = NULL; - enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; - char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; - int yyx; - char *yyfmt; - char const *yyf; - static char const yyunexpected[] = "syntax error, unexpected %s"; - static char const yyexpecting[] = ", expecting %s"; - static char const yyor[] = " or %s"; - char yyformat[sizeof yyunexpected - + sizeof yyexpecting - 1 - + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2) - * (sizeof yyor - 1))]; - char const *yyprefix = yyexpecting; - - /* Start YYX at -YYN if negative to avoid negative indexes in - YYCHECK. */ - int yyxbegin = yyn < 0 ? -yyn : 0; - - /* Stay within bounds of both yycheck and yytname. */ - int yychecklim = YYLAST - yyn; - int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yycount = 1; - - yyarg[0] = yytokenName (*yytokenp); - yyfmt = yystpcpy (yyformat, yyunexpected); - - for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) - { - if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) - { - yycount = 1; - yysize = yysize0; - yyformat[sizeof yyunexpected - 1] = '\0'; - break; - } - yyarg[yycount++] = yytokenName (yyx); - yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx)); - yysize_overflow |= yysize1 < yysize; - yysize = yysize1; - yyfmt = yystpcpy (yyfmt, yyprefix); - yyprefix = yyor; - } - - yyf = YY_(yyformat); - yysize1 = yysize + strlen (yyf); - yysize_overflow |= yysize1 < yysize; - yysize = yysize1; - - if (!yysize_overflow) - yymsg = (char *) YYMALLOC (yysize); - - if (yymsg) - { - char *yyp = yymsg; - int yyi = 0; - while ((*yyp = *yyf)) - { - if (*yyp == '%' && yyf[1] == 's' && yyi < yycount) - { - yyp += yytnamerr (yyp, yyarg[yyi++]); - yyf += 2; - } - else - { - yyp++; - yyf++; - } - } - yyerror (]b4_lyyerror_args[yymsg); - YYFREE (yymsg); - } - else - { - yyerror (]b4_lyyerror_args[YY_("syntax error")); - yyMemoryExhausted (yystackp); - } - } - else -#endif /* YYERROR_VERBOSE */ - yyerror (]b4_lyyerror_args[YY_("syntax error")); - yynerrs += 1; + 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); + yysize1 = yysize + yytnamerr (YY_NULL, yytokenName (yyx)); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; + } + } + } + + 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_ } + + yysize1 = yysize + strlen (yyformat); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; + + 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 look-ahead. */ + of the lookahead. */ /*ARGSUSED*/ static void yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { - yySymbol* const yytokenp = yystackp->yytokenp; size_t yyk; int yyj; @@ -2109,43 +2190,53 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) reductions. Skip tokens until we can proceed. */ while (YYID (yytrue)) { - if (*yytokenp == YYEOF) - yyFail (yystackp][]b4_lpure_args[, NULL); - if (*yytokenp != YYEMPTY) - {]b4_location_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);]])[ - yydestruct ("Error: discarding", - *yytokenp, &yylval]b4_location_if([, &yylloc])[]b4_user_args[); - } - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - *yytokenp = YYTRANSLATE (yychar); - YY_SYMBOL_PRINT ("Next token is", *yytokenp, &yylval, &yylloc); - yyj = yypact[yystackp->yytops.yystates[0]->yylrState]; - if (yyis_pact_ninf (yyj)) - return; - yyj += *yytokenp; - if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp) - { - if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0) - return; - } - else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj])) - return; + yySymbol yytoken; + if (yychar == YYEOF) + yyFail (yystackp][]b4_lpure_args[, YY_NULL); + 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 = YYLEX; + 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] != NULL) + if (yystackp->yytops.yystates[yyk] != YY_NULL) break; if (yyk >= yystackp->yytops.yysize) - yyFail (yystackp][]b4_lpure_args[, NULL); + yyFail (yystackp][]b4_lpure_args[, YY_NULL); for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1) yymarkStackDeleted (yystackp, yyk); yyremoveDeletes (yystackp); @@ -2153,52 +2244,54 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) /* Now pop stack until we find a state that shifts the error token. */ yystackp->yyerrState = 3; - while (yystackp->yytops.yystates[0] != NULL) + while (yystackp->yytops.yystates[0] != YY_NULL) { yyGLRState *yys = yystackp->yytops.yystates[0]; yyj = yypact[yys->yylrState]; - if (! yyis_pact_ninf (yyj)) - { - yyj += YYTERROR; - if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR - && yyisShiftAction (yytable[yyj])) - { - /* Shift the error token having adjusted its location. */ - YYLTYPE yyerrloc;]b4_location_if([[ - 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, &yyerrloc); - yys = yystackp->yytops.yystates[0]; - break; - } - } -]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[ - yydestroyGLRState ("Error: popping", yys]b4_user_args[); + 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_NULL) + yydestroyGLRState ("Error: popping", yys]b4_user_args[); yystackp->yytops.yystates[0] = yys->yypred; yystackp->yynextFree -= 1; yystackp->yyspaceLeft += 1; } - if (yystackp->yytops.yystates[0] == NULL) - yyFail (yystackp][]b4_lpure_args[, NULL); + if (yystackp->yytops.yystates[0] == YY_NULL) + yyFail (yystackp][]b4_lpure_args[, YY_NULL); } -#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; \ - } \ +#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 (YYID (0)) @@ -2209,7 +2302,6 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) ]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[ { int yyresult; - yySymbol yytoken; yyGLRStack yystack; yyGLRStack* const yystackp = &yystack; size_t yyposn; @@ -2217,23 +2309,20 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) YYDPRINTF ((stderr, "Starting parse\n")); yychar = YYEMPTY; - yytoken = YYEMPTY; yylval = yyval_default; -]b4_location_if([ -#if YYLTYPE_IS_TRIVIAL - yylloc.first_line = yylloc.last_line = 1; - yylloc.first_column = yylloc.last_column = 0; +]b4_locations_if([ +#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL + yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[; + yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[; #endif ]) m4_ifdef([b4_initial_action], [ m4_pushdef([b4_at_dollar], [yylloc])dnl m4_pushdef([b4_dollar_dollar], [yylval])dnl /* User initialization code. */ - b4_initial_action + b4_user_initial_action m4_popdef([b4_dollar_dollar])dnl -m4_popdef([b4_at_dollar])dnl -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@])])dnl +m4_popdef([b4_at_dollar])])dnl [ if (! yyinitGLRStack (yystackp, YYINITDEPTH)) goto yyexhaustedlab; @@ -2244,150 +2333,154 @@ b4_syncline([@oline@], [@ofile@])])dnl case 2: goto yyexhaustedlab; default: goto yybuglab; } - yystack.yytokenp = &yytoken; - yyglrShift (&yystack, 0, 0, 0, &yylval, &yylloc); + yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[); yyposn = 0; while (YYID (yytrue)) { /* For efficiency, we have two loops, the first of which is - specialized to deterministic operation (single stack, no - potential ambiguity). */ + specialized to deterministic operation (single stack, no + potential ambiguity). */ /* Standard mode */ while (YYID (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_location_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 - { - if (yytoken == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - 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); - if (yytoken != YYEOF) - { - yychar = YYEMPTY; - yytoken = YYEMPTY; - } - yyposn += 1; - yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc); - if (0 < yystack.yyerrState) - yystack.yyerrState -= 1; - } - else if (yyisErrorAction (yyaction)) - { -]b4_location_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[)); - } - } + { + 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 = YYLEX; + } + + 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 (YYID (yytrue)) - { - yySymbol yytoken_to_shift; - size_t yys; - size_t yyn = yystack.yytops.yysize; - - for (yys = 0; yys < yyn; 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 prevents double destructor calls - on yylval in the event of memory exhaustion. */ - - for (yys = 0; yys < yyn; yys += 1) - YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[)); - yyremoveDeletes (&yystack); - yyn = yystack.yytops.yysize; - - /* 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, yytoken is set to YYEMPTY - before the loop to make sure the user destructor for yylval isn't - called twice. */ - yytoken_to_shift = yytoken; - yychar = YYEMPTY; - yytoken = YYEMPTY; - yyposn += 1; - for (yys = 0; yys < yyn; 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, &yylloc); - YYDPRINTF ((stderr, "Stack %lu now in state #%d\n", - (unsigned long int) yys, - yystack.yytops.yystates[yys]->yylrState)); - } - 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_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ - yyreportSyntaxError (&yystack]b4_user_args[); - goto yyuser_error; - } - else if (yystack.yytops.yysize == 1) - { - YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); - YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); - yycompressStack (&yystack); - break; - } - } + { + 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[); @@ -2412,9 +2505,9 @@ b4_syncline([@oline@], [@ofile@])])dnl goto yyreturn; yyreturn: - if (yytoken != YYEOF && yytoken != YYEMPTY) + if (yychar != YYEMPTY) yydestruct ("Cleanup: discarding lookahead", - yytoken, &yylval]b4_location_if([, &yylloc])[]b4_user_args[); + 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 @@ -2423,32 +2516,34 @@ b4_syncline([@oline@], [@ofile@])])dnl { 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_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]] -)[ yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); - yystates[yyk] = yys->yypred; - yystack.yynextFree -= 1; - yystack.yyspaceLeft += 1; - } - break; - } - } + { + 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_NULL) + yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); + yystates[yyk] = yys->yypred; + yystack.yynextFree -= 1; + yystack.yyspaceLeft += 1; + } + break; + } + } yyfreeGLRStack (&yystack); } - return yyresult; + /* Make sure YYID is used. */ + return YYID (yyresult); } /* DEBUGGING ONLY */ -#ifdef YYDEBUG +#if YYDEBUG static void yypstack (yyGLRStack* yystackp, size_t yyk) __attribute__ ((__unused__)); static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__)); @@ -2459,19 +2554,20 @@ yy_yypstack (yyGLRState* yys) if (yys->yypred) { yy_yypstack (yys->yypred); - fprintf (stderr, " -> "); + YYFPRINTF (stderr, " -> "); } - fprintf (stderr, "%d@@%lu", yys->yylrState, (unsigned long int) yys->yyposn); + YYFPRINTF (stderr, "%d@@%lu", yys->yylrState, + (unsigned long int) yys->yyposn); } static void yypstates (yyGLRState* yyst) { - if (yyst == NULL) - fprintf (stderr, ""); + if (yyst == YY_NULL) + YYFPRINTF (stderr, ""); else yy_yypstack (yyst); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "\n"); } static void @@ -2480,8 +2576,8 @@ yypstack (yyGLRStack* yystackp, size_t yyk) yypstates (yystackp->yytops.yystates[yyk]); } -#define YYINDEX(YYX) \ - ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems) +#define YYINDEX(YYX) \ + ((YYX) == YY_NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems) static void @@ -2491,49 +2587,49 @@ yypdumpstack (yyGLRStack* yystackp) size_t yyi; for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1) { - fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystackp->yyitems)); + YYFPRINTF (stderr, "%3lu. ", + (unsigned long int) (yyp - yystackp->yyitems)); if (*(yybool *) yyp) - { - fprintf (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) - fprintf (stderr, ", firstVal: %ld", - (long int) YYINDEX (yyp->yystate.yysemantics.yyfirstVal)); - } + { + 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 - { - fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld", - yyp->yyoption.yyrule, - (long int) YYINDEX (yyp->yyoption.yystate), - (long int) YYINDEX (yyp->yyoption.yynext)); - } - fprintf (stderr, "\n"); + { + 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"); } - fprintf (stderr, "Tops:"); + YYFPRINTF (stderr, "Tops:"); for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1) - fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi, - (long int) YYINDEX (yystackp->yytops.yystates[yyi])); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "%lu: %ld; ", (unsigned long int) yyi, + (long int) YYINDEX (yystackp->yytops.yystates[yyi])); + YYFPRINTF (stderr, "\n"); } #endif ] b4_epilogue -m4_if(b4_defines_flag, 0, [], -[@output @output_header_name@ -b4_copyright([Skeleton parser for GLR parsing with Bison], - [2002, 2003, 2004, 2005, 2006])[ - -/* C GLR parser skeleton written by Paul Hilfinger. */ -] - -b4_shared_declarations - -extern YYSTYPE b4_prefix[]lval; - -b4_location_if([b4_pure_if([], -[extern YYLTYPE b4_prefix[]lloc;]) -]) -]) +dnl +dnl glr.cc produces its own header. +dnl +m4_if(b4_skeleton, ["glr.c"], +[b4_defines_if( +[@output(b4_spec_defines_file@)@ +b4_copyright([Skeleton interface for Bison GLR parsers in C], + [2002-2012])[ + +]b4_cpp_guard_open([b4_spec_defines_file])[ +]b4_shared_declarations[ +]b4_cpp_guard_close([b4_spec_defines_file])[ +]])]) +m4_divert_pop(0)