X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1221b78adb3f243e9afb8096f95218e2b03a4854..1c72905811fa75e0715eb5ec1066dfcae520d070:/data/glr.c?ds=sidebyside diff --git a/data/glr.c b/data/glr.c index 20f5043f..dcbc7d88 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. +# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software +# Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# 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, don't +# change the value of b4_pure_flag, and don't 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 +83,21 @@ 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. 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]) ## ----------------- ## @@ -103,7 +109,15 @@ m4_define([b4_pure_formals], # -------------------- # Expansion of $$. m4_define([b4_lhs_value], -[((*yyvalp)[]m4_ifval([$1], [.$1]))]) +[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]) @@ -111,7 +125,7 @@ m4_define([b4_lhs_value], # Expansion of $NUM, where the current rule has RULE-LENGTH # symbols on RHS. m4_define([b4_rhs_value], -[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))]) +[b4_symbol_value([b4_rhs_data([$1], [$2]).yysemantics.yysval], [$3])]) @@ -131,7 +145,7 @@ m4_define([b4_lhs_location], # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], -[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)]) +[(b4_rhs_data([$1], [$2]).yyloc)]) @@ -141,16 +155,17 @@ 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, 2003, 2004, 2005, 2006, 2007, 2008]) [ -/* 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], [], +b4_percent_code_get([[top]])[]dnl +m4_if(b4_prefix, [yy], [], [/* Substitute the variable and function names. */ #define yyparse b4_prefix[]parse #define yylex b4_prefix[]lex @@ -159,34 +174,36 @@ m4_if(b4_prefix[], [yy], [], #define yychar b4_prefix[]char #define yydebug b4_prefix[]debug #define yynerrs b4_prefix[]nerrs -#define yylloc b4_prefix[]lloc]) +#define yylloc b4_prefix[]lloc])[ + +/* Copy the first part of user declarations. */ +]b4_user_pre_prologue 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([[requires]])[]dnl -/* Copy the first part of user declarations. */ -]b4_pre_prologue[ +b4_token_enums(b4_tokens) -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) +[#ifndef YYSTYPE ]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 +[[typedef union ]b4_union_name[ +{ +]b4_user_stype[ +} YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]], +[m4_if(b4_tag_seen_flag, 0, +[[typedef int YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]])])[ #endif -#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED) +#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED typedef struct YYLTYPE { -]b4_location_if([ +]b4_locations_if([ int first_line; int first_column; int last_line; @@ -198,15 +215,16 @@ typedef struct YYLTYPE # define YYLTYPE_IS_DECLARED 1 # define YYLTYPE_IS_TRIVIAL 1 #endif -]]) -m4_if(b4_defines_flag, 0, - [b4_shared_declarations], - [#include @output_header_name@])[ +]b4_percent_code_get([[provides]])[]dnl +]) + +b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]], + [b4_shared_declarations])[ /* Enabling traces. */ #ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ +# define YYDEBUG ]b4_parse_trace_if([1], [0])[ #endif /* Enabling verbose error messages. */ @@ -214,7 +232,7 @@ m4_if(b4_defines_flag, 0, # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else -# define YYERROR_VERBOSE ]b4_error_verbose[ +# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[ #endif /* Enabling the token table. */ @@ -230,15 +248,12 @@ 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 @@ -253,7 +268,7 @@ 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 +317,13 @@ b4_syncline([@oline@], [@ofile@]) #ifndef __attribute__ /* This feature is available in gcc versions 2.5 and later. */ -# if (!defined (__GNUC__) || __GNUC__ < 2 \ +# if (! defined __GNUC__ || __GNUC__ < 2 \ || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__) # 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 @@ -343,8 +358,7 @@ b4_syncline([@oline@], [@ofile@]) #define YYMAXUTOK ]b4_user_token_number_max[ #define YYTRANSLATE(YYX) \ - ((YYX <= 0) ? YYEOF : \ - (unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) + ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ static const ]b4_int_type_for([b4_translate])[ yytranslate[] = @@ -353,19 +367,6 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] = }; #if YYDEBUG -/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in - YYRHS. */ -static const ]b4_int_type_for([b4_prhs])[ yyprhs[] = -{ - ]b4_prhs[ -}; - -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ -static const ]b4_int_type_for([b4_rhs])[ yyrhs[] = -{ - ]b4_rhs[ -}; - /* YYRLINE[YYN] -- source line where rule number YYN was defined. */ static const ]b4_int_type_for([b4_rline])[ yyrline[] = { @@ -382,17 +383,10 @@ static const char *const yytname[] = }; #endif -/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ -static const ]b4_int_type_for([b4_r1])[ yyr1[] = -{ - ]b4_r1[ -}; +#define YYPACT_NINF ]b4_pact_ninf[ +#define YYTABLE_NINF ]b4_table_ninf[ -/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ -static const ]b4_int_type_for([b4_r2])[ yyr2[] = -{ - ]b4_r2[ -}; +]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[] = @@ -406,44 +400,6 @@ 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. */ -static const ]b4_int_type_for([b4_defact])[ yydefact[] = -{ - ]b4_defact[ -}; - -/* YYPDEFGOTO[NTERM-NUM]. */ -static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] = -{ - ]b4_defgoto[ -}; - -/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing - STATE-NUM. */ -#define YYPACT_NINF ]b4_pact_ninf[ -static const ]b4_int_type_for([b4_pact])[ yypact[] = -{ - ]b4_pact[ -}; - -/* YYPGOTO[NTERM-NUM]. */ -static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = -{ - ]b4_pgoto[ -}; - -/* 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. */ -#define YYTABLE_NINF ]b4_table_ninf[ -static const ]b4_int_type_for([b4_table])[ yytable[] = -{ - ]b4_table[ -}; - /* 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 @@ -462,19 +418,6 @@ dnl We probably ought to introduce a type for confl. { ]b4_conflicting_rules[ }; - -static const ]b4_int_type_for([b4_check])[ yycheck[] = -{ - ]b4_check[ -}; - -/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing - symbol of state STATE-NUM. */ -static const ]b4_int_type_for([b4_stos])[ yystos[] = -{ - ]b4_stos[ -}; - /* Prevent warning if -Wmissing-prototypes. */ ]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[ @@ -486,7 +429,7 @@ 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) \ @@ -557,34 +500,37 @@ static const int YYEMPTY = -2; typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG; -#define YYCHK(YYE) \ - do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \ - while (YYID (0)) +#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; \ -} while (YYID (0)) + 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"); \ - } \ -} while (YYID (0)) +# 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 (YYID (0)) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ @@ -621,9 +567,9 @@ 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 @@ -648,7 +594,7 @@ 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 @@ -761,6 +707,11 @@ struct yyGLRState { 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; }; @@ -771,6 +722,10 @@ struct yySemanticOption { 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; + YYLTYPE yyloc; /** Next sibling in chain of options. To facilitate merging, * options are chained in decreasing order by address. */ yySemanticOption* yynext; @@ -785,7 +740,7 @@ 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( [ @@ -794,7 +749,6 @@ struct yyGLRStack { YYSTYPE yyval; YYLTYPE yyloc; ])[ - yySymbol* yytokenp; YYJMP_BUF yyexception_buffer; yyGLRStackItem* yyitems; yyGLRStackItem* yynextFree; @@ -899,9 +853,9 @@ 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 @@ -914,14 +868,12 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, *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; + YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen); +]b4_locations_if([[ 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; } @@ -965,15 +917,18 @@ 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_locations_if([, &yys->yyloc])[]b4_user_args[); else { #if YYDEBUG if (yydebug) { - YYFPRINTF (stderr, "%s unresolved ", yymsg); + if (yys->yysemantics.yyfirstVal) + YYFPRINTF (stderr, "%s unresolved ", yymsg); + else + YYFPRINTF (stderr, "%s incomplete ", yymsg); yy_symbol_print (stderr, yystos[yys->yylrState], - &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[); + NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[); YYFPRINTF (stderr, "\n"); } #endif @@ -1092,14 +1047,26 @@ yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState) return yynewItem; } +/** 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 + * stack #K of *STACKP. */ static void -yyaddDeferredAction (yyGLRStack* yystackp, yyGLRState* yystate, - yyGLRState* rhs, yyRuleNum yyrule) +yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, + yyGLRState* yyrhs, yyRuleNum yyrule) { yySemanticOption* yynewOption = &yynewGLRStackItem (yystackp, yyfalse)->yyoption; - yynewOption->yystate = rhs; + yynewOption->yystate = yyrhs; yynewOption->yyrule = yyrule; + if (yystackp->yytops.yylookaheadNeeds[yyk]) + { + yynewOption->yyrawchar = yychar; + yynewOption->yyval = yylval; + yynewOption->yyloc = yylloc; + } + else + yynewOption->yyrawchar = YYEMPTY; yynewOption->yynext = yystate->yysemantics.yyfirstVal; yystate->yysemantics.yyfirstVal = yynewOption; @@ -1118,12 +1085,20 @@ yyinitStateSet (yyGLRStateSet* yyset) if (! yyset->yystates) return yyfalse; yyset->yystates[0] = NULL; + 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 STACK to a single empty stack, with total maximum @@ -1162,7 +1137,7 @@ yyexpandGLRStack (yyGLRStack* yystackp) size_t yysize, yynewSize; size_t yyn; yysize = yystackp->yynextFree - yystackp->yyitems; - if (YYMAXDEPTH <= yysize) + if (YYMAXDEPTH - YYHEADROOM < yysize) yyMemoryExhausted (yystackp); yynewSize = 2*yysize; if (YYMAXDEPTH < yynewSize) @@ -1270,6 +1245,13 @@ yyremoveDeletes (yyGLRStack* yystackp) 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", @@ -1306,7 +1288,7 @@ 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* yyrhs, yyRuleNum yyrule) { yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; @@ -1318,7 +1300,7 @@ yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, yystackp->yytops.yystates[yyk] = yynewState; /* Invokes YY_RESERVE_GLRSTACK. */ - yyaddDeferredAction (yystackp, yynewState, rhs, yyrule); + yyaddDeferredAction (yystackp, yyk, yynewState, yyrhs, yyrule); } /** Pop the symbols consumed by reduction #RULE from the top of stack @@ -1336,12 +1318,12 @@ yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, if (yystackp->yysplitPoint == NULL) { /* Standard special case: single stack. */ - yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; + yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; YYASSERT (yyk == 0); yystackp->yynextFree -= yynrhs; yystackp->yyspaceLeft += yynrhs; yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate; - return yyuserAction (yyrule, yynrhs, rhs, + return yyuserAction (yyrule, yynrhs, yyrhs, yyvalp, yylocp, yystackp]b4_user_args[); } else @@ -1354,7 +1336,7 @@ 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;]])[ @@ -1384,8 +1366,7 @@ do { \ `----------------------------------------------------------*/ /*ARGSUSED*/ static inline void -yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, - YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) +yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule]b4_user_formals[) { int yynrhs = yyrhsLength (yyrule); yybool yynormal __attribute__ ((__unused__)) = @@ -1393,8 +1374,6 @@ yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; int yylow = 1; int yyi; - YYUSE (yyvalp); - YYUSE (yylocp); ]b4_parse_param_use[]dnl [ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n", (unsigned long int) yyk, yyrule - 1, @@ -1402,12 +1381,13 @@ yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, /* The symbols being reduced. */ for (yyi = 0; yyi < yynrhs; yyi++) { - fprintf (stderr, " $%d = ", yyi + 1); - yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], + YYFPRINTF (stderr, " $%d = ", yyi + 1); + yy_symbol_print (stderr, + ]yystos@{b4_rhs_data(yynrhs, yyi + 1).yylrState@}[, &]b4_rhs_value(yynrhs, yyi + 1)[ - ]b4_location_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl + ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl b4_user_args[); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "\n"); } } #endif @@ -1434,7 +1414,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, YYSTYPE yysval; YYLTYPE yyloc; - YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[)); + YY_REDUCE_PRINT ((yystackp, yyk, yyrule]b4_user_args[)); YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[)); YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc); @@ -1470,7 +1450,7 @@ yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, { if (yyp->yylrState == yynewLRState && yyp->yypred == yys) { - yyaddDeferredAction (yystackp, yyp, yys0, yyrule); + yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule); yymarkStackDeleted (yystackp, yyk); YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n", (unsigned long int) yyk, @@ -1497,17 +1477,35 @@ yysplitStack (yyGLRStack* yystackp, size_t yyk) if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity) { yyGLRState** yynewStates; - if (! ((yystackp->yytops.yycapacity - <= (YYSIZEMAX / (2 * sizeof yynewStates[0]))) - && (yynewStates = - (yyGLRState**) YYREALLOC (yystackp->yytops.yystates, - ((yystackp->yytops.yycapacity *= 2) - * sizeof yynewStates[0]))))) + yybool* yynewLookaheadNeeds; + + yynewStates = NULL; + + 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 == NULL) yyMemoryExhausted (yystackp); yystackp->yytops.yystates = yynewStates; + + yynewLookaheadNeeds = + (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds, + (yystackp->yytops.yycapacity + * sizeof yynewLookaheadNeeds[0])); + if (yynewLookaheadNeeds == NULL) + 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; } @@ -1612,50 +1610,71 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1) return 0; } -static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList, - yyGLRStack* yystackp, YYSTYPE* yyvalp, - YYLTYPE* yylocp]b4_user_formals[); +static YYRESULTTAG yyresolveValue (yyGLRState* yys, + 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[) { - YYRESULTTAG yyflag; if (0 < yyn) { YYASSERT (yys->yypred); - yyflag = yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[); - if (yyflag != yyok) - return yyflag; + YYCHK (yyresolveStates (yys->yypred, yyn-1, yystackp]b4_user_args[)); if (! yys->yyresolved) - { - yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystackp, - &yys->yysemantics.yysval, &yys->yyloc - ]b4_user_args[); - if (yyflag != yyok) - return yyflag; - 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[) { yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; int yynrhs; + int yychar_current; + YYSTYPE yylval_current; + YYLTYPE yylloc_current; + YYRESULTTAG yyflag; yynrhs = yyrhsLength (yyopt->yyrule); - YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[)); - yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_location_if([[ + 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;]])[ - return yyuserAction (yyopt->yyrule, yynrhs, - yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, - yyvalp, yylocp, yystackp]b4_user_args[); + yychar_current = yychar; + yylval_current = yylval; + yylloc_current = yylloc; + yychar = yyopt->yyrawchar; + yylval = yyopt->yyval; + yylloc = yyopt->yyloc; + yyflag = yyuserAction (yyopt->yyrule, yynrhs, + yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, + yyvalp, yylocp, yystackp]b4_user_args[); + yychar = yychar_current; + yylval = yylval_current; + yylloc = yylloc_current; + return yyflag; } #if YYDEBUG @@ -1665,7 +1684,7 @@ 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) @@ -1681,11 +1700,11 @@ yyreportTree (yySemanticOption* yyx, int yyindent) if (yyx->yystate->yyposn < yys->yyposn + 1) YYFPRINTF (stderr, "%*s%s -> \n", yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule); + yyx->yyrule - 1); else YYFPRINTF (stderr, "%*s%s -> \n", yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule, (unsigned long int) (yys->yyposn + 1), + yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1), (unsigned long int) yyx->yystate->yyposn); for (yyi = 1; yyi <= yynrhs; yyi += 1) { @@ -1693,11 +1712,11 @@ yyreportTree (yySemanticOption* yyx, int yyindent) { if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn) YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", - yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); + yytokenName (yystos[yystates[yyi-1]->yylrState])); else YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", - yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), - (unsigned long int) (yystates[yyi - 1]->yyposn + 1), + yytokenName (yystos[yystates[yyi-1]->yylrState]), + (unsigned long int) (yystates[yyi-1]->yyposn + 1), (unsigned long int) yystates[yyi]->yyposn); } else @@ -1706,12 +1725,9 @@ yyreportTree (yySemanticOption* yyx, int yyindent) } #endif -static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystackp]b4_pure_formals[) - __attribute__ ((__noreturn__)); -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); @@ -1724,19 +1740,85 @@ 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; } +/** 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) + { + yySemanticOption *yyoption; + yyGLRStackItem yyrhsloc[1 + YYMAXRHS]; + int yynrhs; + int yychar_current; + YYSTYPE yylval_current; + YYLTYPE yylloc_current; + yyoption = yys1->yysemantics.yyfirstVal; + YYASSERT (yyoption != 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; + } + yychar_current = yychar; + yylval_current = yylval; + 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 by OPTIONLIST, perform the indicated - * actions, and return the result. */ +/** Resolve the ambiguity represented in state S, perform the indicated + * 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 (yySemanticOption* yyoptionList, 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** yypp; yybool yymerge; + YYSTYPE yysval; + YYRESULTTAG yyflag; + YYLTYPE *yylocp = &yys->yyloc; yybest = yyoptionList; yymerge = yyfalse; @@ -1754,7 +1836,8 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystackp, switch (yypreference (yybest, yyp)) { case 0: - yyreportAmbiguity (yybest, yyp, yystackp]b4_pure_args[); + yyresolveLocations (yys, 1, yystackp]b4_user_args[); + return yyreportAmbiguity (yybest, yyp]b4_pure_args[); break; case 1: yymerge = yytrue; @@ -1779,22 +1862,39 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystackp, { 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; - YYCHK (yyresolveAction (yyp, yystackp, &yyval1, - &yydummy]b4_user_args[)); - yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1); - } - } - return yyok; + yyflag = yyresolveAction (yybest, yystackp, &yysval, + yylocp]b4_user_args[); + if (yyflag == yyok) + for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext) + { + if (yyprec == yydprec[yyp->yyrule]) + { + YYSTYPE yysval_other; + YYLTYPE yydummy; + yyflag = yyresolveAction (yyp, yystackp, &yysval_other, + &yydummy]b4_user_args[); + if (yyflag != yyok) + { + yydestruct ("Cleanup: discarding incompletely merged value for", + yystos[yys->yylrState], + &yysval]b4_locations_if([, yylocp])[]b4_user_args[); + break; + } + yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other); + } + } + } + else + yyflag = yyresolveAction (yybest, yystackp, &yysval, yylocp]b4_user_args[); + + if (yyflag == yyok) + { + yys->yyresolved = yytrue; + yys->yysemantics.yysval = yysval; } else - return yyresolveAction (yybest, yystackp, yyvalp, yylocp]b4_user_args[); + yys->yysemantics.yyfirstVal = NULL; + return yyflag; } static YYRESULTTAG @@ -1852,7 +1952,6 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, int yyaction; const short int* yyconflicts; yyRuleNum yyrule; - yySymbol* const yytokenp = yystackp->yytokenp; while (yystackp->yytops.yystates[yyk] != NULL) { @@ -1876,14 +1975,26 @@ yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, } else { - if (*yytokenp == YYEMPTY) + yySymbol yytoken; + yystackp->yytops.yylookaheadNeeds[yyk] = yytrue; + if (yychar == 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); + + 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) { @@ -1921,41 +2032,36 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) if (yystackp->yyerrState == 0) { #if YYERROR_VERBOSE - yySymbol* const yytokenp = yystackp->yytokenp; int yyn; yyn = yypact[yystackp->yytops.yystates[0]->yylrState]; - if (YYPACT_NINF < yyn && yyn < YYLAST) + if (YYPACT_NINF < yyn && yyn <= YYLAST) { - size_t yysize0 = yytnamerr (NULL, yytokenName (*yytokenp)); + yySymbol yytoken = YYTRANSLATE (yychar); + size_t yysize0 = yytnamerr (NULL, yytokenName (yytoken)); size_t yysize = yysize0; size_t yysize1; yybool yysize_overflow = yyfalse; char* yymsg = NULL; enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + /* Internationalized format string. */ + const char *yyformat = 0; + /* Arguments of yyformat. */ 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 yychecklim = YYLAST - yyn + 1; int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yycount = 1; - yyarg[0] = yytokenName (*yytokenp); - yyfmt = yystpcpy (yyformat, yyunexpected); + /* Number of reported tokens (one for the "unexpected", one per + "expected"). */ + int yycount = 0; + int yyx; + + yyarg[yycount++] = yytokenName (yytoken); for (yyx = yyxbegin; yyx < yyxend; ++yyx) if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) @@ -1964,19 +2070,29 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { 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); + switch (yycount) + { +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + 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; @@ -1987,17 +2103,17 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { char *yyp = yymsg; int yyi = 0; - while ((*yyp = *yyf)) + while ((*yyp = *yyformat)) { - if (*yyp == '%' && yyf[1] == 's' && yyi < yycount) + if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) { yyp += yytnamerr (yyp, yyarg[yyi++]); - yyf += 2; + yyformat += 2; } else { yyp++; - yyf++; + yyformat++; } } yyerror (]b4_lyyerror_args[yymsg); @@ -2018,11 +2134,10 @@ yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) /* 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; @@ -2031,29 +2146,39 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) reductions. Skip tokens until we can proceed. */ while (YYID (yytrue)) { - if (*yytokenp == YYEOF) + yySymbol yytoken; + if (yychar == YYEOF) yyFail (yystackp][]b4_lpure_args[, NULL); - if (*yytokenp != YYEMPTY) - {]b4_location_if([[ + 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);]])[ + YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[ + yytoken = YYTRANSLATE (yychar); yydestruct ("Error: discarding", - *yytokenp, &yylval]b4_location_if([, &yylloc])[]b4_user_args[); + yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); } YYDPRINTF ((stderr, "Reading a token: ")); yychar = YYLEX; - *yytokenp = YYTRANSLATE (yychar); - YY_SYMBOL_PRINT ("Next token is", *yytokenp, &yylval, &yylloc); + 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 (yyis_pact_ninf (yyj)) return; - yyj += *yytokenp; - if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp) + yyj += yytoken; + if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken) { if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0) return; @@ -2086,9 +2211,9 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) && yyisShiftAction (yytable[yyj])) { /* Shift the error token having adjusted its location. */ - YYLTYPE yyerrloc;]b4_location_if([[ + YYLTYPE yyerrloc;]b4_locations_if([[ yystackp->yyerror_range[2].yystate.yyloc = yylloc; - YYLLOC_DEFAULT (yyerrloc, yystackp->yyerror_range, 2);]])[ + YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[ YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]], &yylval, &yyerrloc); yyglrShift (yystackp, 0, yytable[yyj], @@ -2097,8 +2222,9 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) break; } } -]b4_location_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[ - yydestroyGLRState ("Error: popping", yys]b4_user_args[); +]b4_locations_if([[ yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[ + if (yys->yypred != NULL) + yydestroyGLRState ("Error: popping", yys]b4_user_args[); yystackp->yytops.yystates[0] = yys->yypred; yystackp->yynextFree -= 1; yystackp->yyspaceLeft += 1; @@ -2131,30 +2257,27 @@ 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; YYDPRINTF ((stderr, "Starting parse\n")); - yytoken = YYEMPTY; + yychar = YYEMPTY; yylval = yyval_default; -]b4_location_if([ +]b4_locations_if([ #if YYLTYPE_IS_TRIVIAL - yylloc.first_line = yylloc.last_line = 1; - yylloc.first_column = yylloc.last_column = 0; + 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; @@ -2165,7 +2288,6 @@ b4_syncline([@oline@], [@ofile@])])dnl case 2: goto yyexhaustedlab; default: goto yybuglab; } - yystack.yytokenp = &yytoken; yyglrShift (&yystack, 0, 0, 0, &yylval, &yylloc); yyposn = 0; @@ -2190,7 +2312,7 @@ b4_syncline([@oline@], [@ofile@])])dnl yyrule = yydefaultAction (yystate); if (yyrule == 0) { -]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ yyreportSyntaxError (&yystack]b4_user_args[); goto yyuser_error; } @@ -2198,21 +2320,31 @@ b4_syncline([@oline@], [@ofile@])])dnl } else { - if (yytoken == YYEMPTY) + 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); - if (yytoken != YYEOF) - yytoken = YYEMPTY; + yychar = YYEMPTY; yyposn += 1; yyglrShift (&yystack, 0, yyaction, yyposn, &yylval, &yylloc); if (0 < yystack.yyerrState) @@ -2220,7 +2352,7 @@ b4_syncline([@oline@], [@ofile@])])dnl } else if (yyisErrorAction (yyaction)) { -]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ yyreportSyntaxError (&yystack]b4_user_args[); goto yyuser_error; } @@ -2233,7 +2365,9 @@ b4_syncline([@oline@], [@ofile@])])dnl { yySymbol yytoken_to_shift; size_t yys; - size_t yyn = yystack.yytops.yysize; + + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) + yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY; /* yyprocessOneStack returns one of three things: @@ -2251,23 +2385,33 @@ b4_syncline([@oline@], [@ofile@])])dnl 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 + reductions on all stacks) helps prevent double destructor calls on yylval in the event of memory exhaustion. */ - for (yys = 0; yys < yyn; yys += 1) + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[)); yyremoveDeletes (&yystack); - yyn = yystack.yytops.yysize; + 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, yytoken is set to YYEMPTY + 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 = yytoken; - yytoken = YYEMPTY; + yytoken_to_shift = YYTRANSLATE (yychar); + yychar = YYEMPTY; yyposn += 1; - for (yys = 0; yys < yyn; yys += 1) + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) { int yyaction; const short int* yyconflicts; @@ -2283,18 +2427,8 @@ b4_syncline([@oline@], [@ofile@])])dnl (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) + + if (yystack.yytops.yysize == 1) { YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); @@ -2326,9 +2460,10 @@ 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_locations_if([, &yylloc])[]b4_user_args[); /* If the stack is well-formed, pop the stack until it is empty, destroying its entries as we go. But free the stack regardless @@ -2346,8 +2481,9 @@ b4_syncline([@oline@], [@ofile@])])dnl 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[); +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]] +)[ if (yys->yypred != NULL) + yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); yystates[yyk] = yys->yypred; yystack.yynextFree -= 1; yystack.yyspaceLeft += 1; @@ -2358,11 +2494,12 @@ b4_syncline([@oline@], [@ofile@])])dnl 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__)); @@ -2373,19 +2510,20 @@ 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, ""); + YYFPRINTF (stderr, ""); else yy_yypstack (yyst); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "\n"); } static void @@ -2405,49 +2543,52 @@ 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)); + 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) - fprintf (stderr, ", firstVal: %ld", - (long int) YYINDEX (yyp->yystate.yysemantics.yyfirstVal)); + 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)); + 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)); } - fprintf (stderr, "\n"); + 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_epilogue[]dnl +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, 2003, 2004, 2005, 2006, 2007, 2008]) b4_shared_declarations -extern YYSTYPE b4_prefix[]lval; +b4_pure_if([], +[[extern YYSTYPE ]b4_prefix[lval;]]) -b4_location_if([b4_pure_if([], -[extern YYLTYPE b4_prefix[]lloc;]) -]) +b4_locations_if([b4_pure_if([], +[extern YYLTYPE ]b4_prefix[lloc;]) ]) +])])[]dnl +m4_divert_pop(0)