X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/02998094314217bb4d5c4d946bfd934963eb3793..9874f80b2e813a8ad8e5562dbbaa30ecafd5e7d8:/data/glr.c?ds=sidebyside diff --git a/data/glr.c b/data/glr.c index 11f11292..17eff387 100644 --- a/data/glr.c +++ b/data/glr.c @@ -1,23 +1,24 @@ -m4_divert(-1) -*- C -*- + -*- C -*- # GLR skeleton for Bison -# Copyright (C) 2002, 2003, 2004, 2005 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]) ## ---------------- ## ## Default values. ## @@ -33,11 +34,20 @@ 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 # --------------- -# This is specific to GLR because it relies on ISO C formal argument -# declarations. +# The possible parse-params formal arguments preceded by a comma. +# +# This is not shared with yacc.c in c.m4 because GLR relies on ISO C +# formal argument declarations. m4_define([b4_user_formals], [m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])]) @@ -47,53 +57,47 @@ m4_define([b4_user_formals], # Accumule in b4_lex_param all the yylex arguments. # Yes, this is quite ugly... m4_define([b4_lex_param], -m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[yylvalp]]][]dnl -b4_location_if([, [[YYLTYPE *], [yyllocp]]])])dnl +m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl +b4_locations_if([, [[YYLTYPE *], [&yylloc]]])])dnl m4_ifdef([b4_lex_param], [, ]b4_lex_param))) # b4_yyerror_args # --------------- -# Arguments passed to yyerror: user args plus yylloc. +# 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 yyllocp 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([yyllocp, ])])dnl +[b4_pure_if([b4_locations_if([&yylloc, ])])dnl m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) # b4_pure_args # ------------ -# Arguments needed by yyerror: user args plus yylloc. +# 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_formals -# --------------- -# Arguments passed to yyerror: user formals plus yyllocp. -m4_define([b4_pure_formals], -[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals]) +[b4_pure_if([b4_locations_if([, yylocp])])[]b4_user_args]) # b4_lpure_args # ------------- -# Same as above, but on the look-ahead, hence yyllocp 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([, yyllocp])])[]b4_user_args]) +[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args]) -# b4_lpure_formals -# ---------------- -# Same as above, but on the look-ahead, hence yyllocp instead of yylocp. -m4_define([b4_lpure_formals], -[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals]) +# b4_pure_formals +# --------------- +# Arguments passed to yyerror: user formals plus yylocp. +m4_define([b4_pure_formals], +[b4_pure_if([b4_locations_if([, YYLTYPE *yylocp])])[]b4_user_formals]) ## ----------------- ## @@ -113,7 +117,7 @@ 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 (m4_eval([$2 - $1]))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))]) +[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3]))]) @@ -133,19 +137,27 @@ 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 (m4_eval([$2 - $1]))@}.yystate.yyloc)]) +[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)]) + + + +## -------------- ## +## Output files. ## +## -------------- ## # 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]) +m4_divert_push(0)dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison GLR parsers in C], + [2002-2011]) [ -/* 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 @@ -154,46 +166,36 @@ 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]) - -b4_token_enums(b4_tokens) +#define yylloc b4_prefix[]lloc])[ /* Copy the first part of user declarations. */ -b4_pre_prologue[ +]b4_user_pre_prologue -/* Enabling traces. */ -#ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ -#endif - -/* Enabling verbose error messages. */ -#ifdef YYERROR_VERBOSE -# undef YYERROR_VERBOSE -# define YYERROR_VERBOSE 1 -#else -# define YYERROR_VERBOSE ]b4_error_verbose[ -#endif +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_percent_code_get([[requires]])[]dnl -/* Enabling the token table. */ -#ifndef YYTOKEN_TABLE -# define YYTOKEN_TABLE ]b4_token_table[ -#endif +b4_token_enums(b4_tokens) -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) +[#ifndef YYSTYPE ]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_file_name]) -typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE; -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@])], -[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; @@ -206,26 +208,47 @@ typedef struct YYLTYPE # define YYLTYPE_IS_TRIVIAL 1 #endif +]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_flag[ +#endif + +/* Enabling verbose error messages. */ +#ifdef YYERROR_VERBOSE +# undef YYERROR_VERBOSE +# define YYERROR_VERBOSE 1 +#else +# define YYERROR_VERBOSE ]b4_error_verbose_flag[ +#endif + +/* Enabling the token table. */ +#ifndef YYTOKEN_TABLE +# define YYTOKEN_TABLE ]b4_token_table[ +#endif + /* Default (constant) value used for initialization for null right-hand sides. Unlike the standard yacc.c template, here we set the default value of $$ to a zeroed-out value. Since the default value is undefined, this behavior is - technically correct. */ + technically correct. */ 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) @@ -237,7 +260,21 @@ b4_syncline([@oline@], [@ofile@]) #endif /* Suppress unused-variable warnings by "using" E. */ -#define YYUSE(e) do {;} while (/*CONSTCOND*/ yyfalse && (e)) +#if ! defined lint || defined __GNUC__ +# define YYUSE(e) ((void) (e)) +#else +# define YYUSE(e) /* empty */ +#endif + +/* Identity function, used to suppress warnings about constant conditions. */ +#ifndef lint +# define YYID(n) (n) +#else +]b4_c_function_def([YYID], [static int], [[int i], [i]])[ +{ + return i; +} +#endif #ifndef YYFREE # define YYFREE free @@ -272,13 +309,14 @@ 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) \ + || (defined __STRICT_ANSI__ && __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 @@ -289,23 +327,23 @@ b4_syncline([@oline@], [@ofile@]) # define YYASSERT(condition) ((void) ((condition) || (abort (), 0))) #endif -/* YYFINAL -- State number of the termination state. */ +/* YYFINAL -- State number of the termination state. */ #define YYFINAL ]b4_final_state_number[ /* YYLAST -- Last index in YYTABLE. */ #define YYLAST ]b4_last[ -/* YYNTOKENS -- Number of terminals. */ +/* YYNTOKENS -- Number of terminals. */ #define YYNTOKENS ]b4_tokens_number[ -/* YYNNTS -- Number of nonterminals. */ +/* YYNNTS -- Number of nonterminals. */ #define YYNNTS ]b4_nterms_number[ -/* YYNRULES -- Number of rules. */ +/* YYNRULES -- Number of rules. */ #define YYNRULES ]b4_rules_number[ -/* YYNRULES -- Number of states. */ +/* YYNRULES -- Number of states. */ #define YYNSTATES ]b4_states_number[ -/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */ +/* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */ #define YYMAXRHS ]b4_r2_max[ /* YYMAXLEFT -- Maximum number of symbols to the left of a handle - accessed by $0, $-1, etc., in any rule. */ + accessed by $0, $-1, etc., in any rule. */ #define YYMAXLEFT ]b4_max_left_semantic_context[ /* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */ @@ -313,8 +351,7 @@ 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[] = @@ -330,7 +367,7 @@ static const ]b4_int_type_for([b4_prhs])[ yyprhs[] = ]b4_prhs[ }; -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ +/* YYRHS -- A `-1'-separated list of the rules' RHS. */ static const ]b4_int_type_for([b4_rhs])[ yyrhs[] = { ]b4_rhs[ @@ -345,7 +382,7 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] = #if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at YYNTOKENS, nonterminals. */ + First, the terminals, then, starting at YYNTOKENS, nonterminals. */ static const char *const yytname[] = { ]b4_tname[ @@ -364,27 +401,27 @@ static const ]b4_int_type_for([b4_r2])[ yyr2[] = ]b4_r2[ }; -/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */ +/* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */ static const ]b4_int_type_for([b4_dprec])[ yydprec[] = { ]b4_dprec[ }; -/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */ +/* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */ 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[ }; -/* YYPDEFGOTO[NTERM-NUM]. */ +/* YYPDEFGOTO[NTERM-NUM]. */ static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] = { ]b4_defgoto[ @@ -406,8 +443,7 @@ 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[] = { @@ -456,12 +492,12 @@ 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 (N) \ + if (YYID (N)) \ { \ (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ @@ -475,7 +511,7 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = (Current).first_column = (Current).last_column = \ YYRHSLOC (Rhs, 0).last_column; \ } \ - while (/*CONSTCOND*/ 0) + while (YYID (0)) /* YY_LOCATION_PRINT -- Print the location on the stream. This macro was not mandated originally: define only if we know @@ -483,8 +519,8 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = # define YY_LOCATION_PRINT(File, Loc) \ fprintf (File, "%d.%d-%d.%d", \ - (Loc).first_line, (Loc).first_column, \ - (Loc).last_line, (Loc).last_column) + (Loc).first_line, (Loc).first_column, \ + (Loc).last_line, (Loc).last_column) #endif ]],[ #ifndef YYLLOC_DEFAULT @@ -503,9 +539,18 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = ]b4_pure_if( [ #undef yynerrs -#define yynerrs (yystack->yyerrcnt) +#define yynerrs (yystackp->yyerrcnt) #undef yychar -#define yychar (yystack->yyrawchar)], +#define yychar (yystackp->yyrawchar) +#undef yylval +#define yylval (yystackp->yyval) +#undef yylloc +#define yylloc (yystackp->yyloc) +m4_if(b4_prefix[], [yy], [], +[#define b4_prefix[]nerrs yynerrs +#define b4_prefix[]char yychar +#define b4_prefix[]lval yylval +#define b4_prefix[]lloc yylloc])], [YYSTYPE yylval; YYLTYPE yylloc; @@ -520,32 +565,32 @@ typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG; #define YYCHK(YYE) \ do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \ - while (/*CONSTCOND*/ 0) + while (YYID (0)) #if YYDEBUG -#if ! defined (YYFPRINTF) +# ifndef YYFPRINTF # define YYFPRINTF fprintf -#endif +# endif # define YYDPRINTF(Args) \ do { \ if (yydebug) \ YYFPRINTF Args; \ -} while (/*CONSTCOND*/ 0) +} while (YYID (0)) -]b4_yysymprint_generate([b4_c_ansi_function_def])[ +]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); \ - yysymprint (stderr, \ - Type, Value]b4_location_if([, Location])[]b4_user_args[); \ + yy_symbol_print (stderr, Type, \ + Value]b4_locations_if([, Location])[]b4_user_args[); \ YYFPRINTF (stderr, "\n"); \ } \ -} while (/*CONSTCOND*/ 0) +} while (YYID (0)) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ @@ -578,13 +623,13 @@ int yydebug; allocation. This is to allow allocation and initialization to be completed by functions that call yyexpandGLRStack before the stack is expanded, thus insuring that all necessary pointers get - properly redirected to new data. */ + properly redirected to new data. */ #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 @@ -596,20 +641,20 @@ int yydebug; do { \ if (Yystack->yyspaceLeft < YYHEADROOM) \ yyexpandGLRStack (Yystack); \ - } while (/*CONSTCOND*/ 0) + } while (YYID (0)) #else # define YY_RESERVE_GLRSTACK(Yystack) \ do { \ if (Yystack->yyspaceLeft < YYHEADROOM) \ yyMemoryExhausted (Yystack); \ - } while (/*CONSTCOND*/ 0) + } while (YYID (0)) #endif #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 @@ -691,18 +736,18 @@ typedef short int yySymbol; typedef short int yyItemNum; typedef struct yyGLRState yyGLRState; +typedef struct yyGLRStateSet yyGLRStateSet; typedef struct yySemanticOption yySemanticOption; typedef union yyGLRStackItem yyGLRStackItem; typedef struct yyGLRStack yyGLRStack; -typedef struct yyGLRStateSet yyGLRStateSet; struct yyGLRState { - /** Type tag: always true. */ + /** Type tag: always true. */ yybool yyisState; - /** Type tag for yysemantics. If true, yysval applies, otherwise - * yyfirstVal applies. */ + /** Type tag for yysemantics. If true, yysval applies, otherwise + * yyfirstVal applies. */ yybool yyresolved; - /** Number of corresponding LALR(1) machine state. */ + /** Number of corresponding LALR(1) machine state. */ yyStateNum yylrState; /** Preceding state in this stack */ yyGLRState* yypred; @@ -711,34 +756,43 @@ struct yyGLRState { union { /** First in a chain of alternative reductions producing the * non-terminal corresponding to this state, threaded through - * yynext. */ + * yynext. */ yySemanticOption* yyfirstVal; - /** Semantic value for this state. */ + /** Semantic value for this state. */ YYSTYPE yysval; } yysemantics; - /** Source location for this state. */ + /** Source location for this state. */ YYLTYPE yyloc; }; struct yyGLRStateSet { yyGLRState** yystates; + /** During nondeterministic operation, yylookaheadNeeds tracks which + * stacks have actually needed the current lookahead. During deterministic + * operation, yylookaheadNeeds[0] is not maintained since it would merely + * duplicate yychar != YYEMPTY. */ + yybool* yylookaheadNeeds; size_t yysize, yycapacity; }; struct yySemanticOption { - /** Type tag: always false. */ + /** Type tag: always false. */ yybool yyisState; /** Rule number for this reduction */ yyRuleNum yyrule; - /** The last RHS state in the list of states to be reduced. */ + /** The last RHS state in the list of states to be reduced. */ yyGLRState* yystate; - /** Next sibling in chain of options. To facilitate merging, - * options are chained in decreasing order by address. */ + /** 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; }; -/** Type of the items in the GLR stack. The yyisState field - * indicates which item of the union is valid. */ +/** Type of the items in the GLR stack. The yyisState field + * indicates which item of the union is valid. */ union yyGLRStackItem { yyGLRState yystate; yySemanticOption yyoption; @@ -746,14 +800,15 @@ 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; ])[ - yySymbol* yytokenp; YYJMP_BUF yyexception_buffer; yyGLRStackItem* yyitems; yyGLRStackItem* yynextFree; @@ -763,24 +818,26 @@ struct yyGLRStack { yyGLRStateSet yytops; }; -static void yyexpandGLRStack (yyGLRStack* yystack); +#if YYSTACKEXPANDABLE +static void yyexpandGLRStack (yyGLRStack* yystackp); +#endif -static void yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yymsg) +static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) __attribute__ ((__noreturn__)); static void -yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yymsg) +yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) { if (yymsg != NULL) yyerror (]b4_yyerror_args[yymsg); - YYLONGJMP (yystack->yyexception_buffer, 1); + YYLONGJMP (yystackp->yyexception_buffer, 1); } -static void yyMemoryExhausted (yyGLRStack* yystack) +static void yyMemoryExhausted (yyGLRStack* yystackp) __attribute__ ((__noreturn__)); static void -yyMemoryExhausted (yyGLRStack* yystack) +yyMemoryExhausted (yyGLRStack* yystackp) { - YYLONGJMP (yystack->yyexception_buffer, 2); + YYLONGJMP (yystackp->yyexception_buffer, 2); } #if YYDEBUG || YYERROR_VERBOSE @@ -797,7 +854,7 @@ yytokenName (yySymbol yytoken) /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting * at YYVSP[YYLOW0].yystate.yypred. Leaves YYVSP[YYLOW1].yystate.yypred - * containing the pointer to the next state in the chain. */ + * containing the pointer to the next state in the chain. */ static void yyfillin (yyGLRStackItem *, int, int) __attribute__ ((__unused__)); static void yyfillin (yyGLRStackItem *yyvsp, int yylow0, int yylow1) @@ -834,21 +891,21 @@ yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal) /** Perform user action for rule number YYN, with RHS length YYRHSLEN, * and top stack item YYVSP. YYLVALP points to place to put semantic * value ($$), and yylocp points to place for location information - * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT, - * yyerr for YYERROR, yyabort for YYABORT. */ -static YYRESULTTAG + * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT, + * yyerr for YYERROR, yyabort for YYABORT. */ +/*ARGSUSED*/ static YYRESULTTAG yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, YYSTYPE* yyvalp, YYLTYPE* YYOPTIONAL_LOC (yylocp), - yyGLRStack* yystack - ]b4_user_formals[) + yyGLRStack* yystackp + ]b4_user_formals[) { yybool yynormal __attribute__ ((__unused__)) = - (yystack->yysplitPoint == NULL); + (yystackp->yysplitPoint == NULL); int yylow; - -# undef yyerrok -# define yyerrok (yystack->yyerrState = 0) +]b4_parse_param_use[]dnl +[# undef yyerrok +# define yyerrok (yystackp->yyerrState = 0) # undef YYACCEPT # define YYACCEPT return yyaccept # undef YYABORT @@ -856,9 +913,9 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, # undef YYERROR # define YYERROR return yyerrok, yyerr # undef YYRECOVERING -# define YYRECOVERING (yystack->yyerrState != 0) +# define YYRECOVERING() (yystackp->yyerrState != 0) # undef yyclearin -# define yyclearin (yychar = *(yystack->yytokenp) = YYEMPTY) +# define yyclearin (yychar = YYEMPTY) # undef YYFILL # define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal) # undef YYBACKUP @@ -871,12 +928,12 @@ 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([[ yystack->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 + ]b4_user_actions[ default: break; } @@ -888,12 +945,10 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, # undef YYBACKUP # undef yyclearin # undef YYRECOVERING -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@]) } -static void +/*ARGSUSED*/ static void yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1) { YYUSE (yy0); @@ -901,11 +956,11 @@ yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1) switch (yyn) { - b4_mergers + ]b4_mergers[ default: break; } } -[ + /* Bison grammar-table manipulation. */ ]b4_yydestruct_generate([b4_c_ansi_function_def])[ @@ -922,63 +977,62 @@ 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); - yysymprint (stderr, yystos[yys->yylrState], - &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[]b4_user_args[); + if (yys->yysemantics.yyfirstVal) + YYFPRINTF (stderr, "%s unresolved ", yymsg); + else + YYFPRINTF (stderr, "%s incomplete ", yymsg); + yy_symbol_print (stderr, yystos[yys->yylrState], + NULL]b4_locations_if([, &yys->yyloc])[]b4_user_args[); 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[); + } } } -/** Left-hand-side symbol for rule #RULE. */ +/** Left-hand-side symbol for rule #RULE. */ static inline yySymbol 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). */ + * 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. */ +/** The default reduction for STATE, assuming it has one. */ static inline yyRuleNum yydefaultAction (yyStateNum yystate) { return yydefact[yystate]; } -#define yyis_table_ninf(yytable_value) \ - ]m4_if(m4_eval(b4_table_ninf < b4_table_min), 1, - 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 @@ -990,15 +1044,16 @@ 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]; @@ -1040,32 +1095,44 @@ yyisErrorAction (int yyaction) * headroom. */ static inline yyGLRStackItem* -yynewGLRStackItem (yyGLRStack* yystack, yybool yyisState) +yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState) { - yyGLRStackItem* yynewItem = yystack->yynextFree; - yystack->yyspaceLeft -= 1; - yystack->yynextFree += 1; + yyGLRStackItem* yynewItem = yystackp->yynextFree; + yystackp->yyspaceLeft -= 1; + yystackp->yynextFree += 1; yynewItem->yystate.yyisState = yyisState; return yynewItem; } +/** Add a new semantic action that will execute the action for rule + * 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* yystack, yyGLRState* yystate, +yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, yyGLRState* rhs, yyRuleNum yyrule) { yySemanticOption* yynewOption = - &yynewGLRStackItem (yystack, yyfalse)->yyoption; + &yynewGLRStackItem (yystackp, yyfalse)->yyoption; yynewOption->yystate = rhs; 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; - YY_RESERVE_GLRSTACK (yystack); + YY_RESERVE_GLRSTACK (yystackp); } /* GLRStacks */ -/** Initialize SET to a singleton set containing an empty stack. */ +/** Initialize SET to a singleton set containing an empty stack. */ static yybool yyinitStateSet (yyGLRStateSet* yyset) { @@ -1075,30 +1142,38 @@ 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 - * capacity for all stacks of SIZE. */ + * capacity for all stacks of SIZE. */ static yybool -yyinitGLRStack (yyGLRStack* yystack, size_t yysize) +yyinitGLRStack (yyGLRStack* yystackp, size_t yysize) { - yystack->yyerrState = 0; + yystackp->yyerrState = 0; yynerrs = 0; - yystack->yyspaceLeft = yysize; - yystack->yyitems = - (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystack->yynextFree[0]); - if (!yystack->yyitems) + yystackp->yyspaceLeft = yysize; + yystackp->yyitems = + (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]); + if (!yystackp->yyitems) return yyfalse; - yystack->yynextFree = yystack->yyitems; - yystack->yysplitPoint = NULL; - yystack->yylastDeleted = NULL; - return yyinitStateSet (&yystack->yytops); + yystackp->yynextFree = yystackp->yyitems; + yystackp->yysplitPoint = NULL; + yystackp->yylastDeleted = NULL; + return yyinitStateSet (&yystackp->yytops); } @@ -1110,24 +1185,24 @@ yyinitGLRStack (yyGLRStack* yystack, size_t yysize) stack from outside should be considered invalid after this call. We always expand when there are 1 or fewer items left AFTER an allocation, so that we can avoid having external pointers exist - across an allocation. */ + across an allocation. */ static void -yyexpandGLRStack (yyGLRStack* yystack) +yyexpandGLRStack (yyGLRStack* yystackp) { yyGLRStackItem* yynewItems; yyGLRStackItem* yyp0, *yyp1; size_t yysize, yynewSize; size_t yyn; - yysize = yystack->yynextFree - yystack->yyitems; - if (YYMAXDEPTH <= yysize) - yyMemoryExhausted (yystack); + yysize = yystackp->yynextFree - yystackp->yyitems; + if (YYMAXDEPTH - YYHEADROOM < yysize) + yyMemoryExhausted (yystackp); yynewSize = 2*yysize; if (YYMAXDEPTH < yynewSize) yynewSize = YYMAXDEPTH; yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]); if (! yynewItems) - yyMemoryExhausted (yystack); - for (yyp0 = yystack->yyitems, yyp1 = yynewItems, yyn = yysize; + yyMemoryExhausted (yystackp); + for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize; 0 < yyn; yyn -= 1, yyp0 += 1, yyp1 += 1) { @@ -1153,80 +1228,87 @@ yyexpandGLRStack (yyGLRStack* yystack) yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); } } - if (yystack->yysplitPoint != NULL) - yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewItems, - yystack->yysplitPoint, yystate); - - for (yyn = 0; yyn < yystack->yytops.yysize; yyn += 1) - if (yystack->yytops.yystates[yyn] != NULL) - yystack->yytops.yystates[yyn] = - YYRELOC (yystack->yyitems, yynewItems, - yystack->yytops.yystates[yyn], yystate); - YYFREE (yystack->yyitems); - yystack->yyitems = yynewItems; - yystack->yynextFree = yynewItems + yysize; - yystack->yyspaceLeft = yynewSize - yysize; + if (yystackp->yysplitPoint != NULL) + yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems, + yystackp->yysplitPoint, yystate); + + for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1) + if (yystackp->yytops.yystates[yyn] != NULL) + yystackp->yytops.yystates[yyn] = + YYRELOC (yystackp->yyitems, yynewItems, + yystackp->yytops.yystates[yyn], yystate); + YYFREE (yystackp->yyitems); + yystackp->yyitems = yynewItems; + yystackp->yynextFree = yynewItems + yysize; + yystackp->yyspaceLeft = yynewSize - yysize; } #endif static void -yyfreeGLRStack (yyGLRStack* yystack) +yyfreeGLRStack (yyGLRStack* yystackp) { - YYFREE (yystack->yyitems); - yyfreeStateSet (&yystack->yytops); + YYFREE (yystackp->yyitems); + yyfreeStateSet (&yystackp->yytops); } /** Assuming that S is a GLRState somewhere on STACK, update the * splitpoint of STACK, if needed, so that it is at least as deep as - * S. */ + * S. */ static inline void -yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys) +yyupdateSplit (yyGLRStack* yystackp, yyGLRState* yys) { - if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys) - yystack->yysplitPoint = yys; + if (yystackp->yysplitPoint != NULL && yystackp->yysplitPoint > yys) + yystackp->yysplitPoint = yys; } -/** Invalidate stack #K in STACK. */ +/** Invalidate stack #K in STACK. */ static inline void -yymarkStackDeleted (yyGLRStack* yystack, size_t yyk) +yymarkStackDeleted (yyGLRStack* yystackp, size_t yyk) { - if (yystack->yytops.yystates[yyk] != NULL) - yystack->yylastDeleted = yystack->yytops.yystates[yyk]; - yystack->yytops.yystates[yyk] = NULL; + if (yystackp->yytops.yystates[yyk] != NULL) + yystackp->yylastDeleted = yystackp->yytops.yystates[yyk]; + yystackp->yytops.yystates[yyk] = NULL; } /** Undelete the last stack that was marked as deleted. Can only be done once after a deletion, and only when all other stacks have - been deleted. */ + been deleted. */ static void -yyundeleteLastStack (yyGLRStack* yystack) +yyundeleteLastStack (yyGLRStack* yystackp) { - if (yystack->yylastDeleted == NULL || yystack->yytops.yysize != 0) + if (yystackp->yylastDeleted == NULL || yystackp->yytops.yysize != 0) return; - yystack->yytops.yystates[0] = yystack->yylastDeleted; - yystack->yytops.yysize = 1; + yystackp->yytops.yystates[0] = yystackp->yylastDeleted; + yystackp->yytops.yysize = 1; YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n")); - yystack->yylastDeleted = NULL; + yystackp->yylastDeleted = NULL; } static inline void -yyremoveDeletes (yyGLRStack* yystack) +yyremoveDeletes (yyGLRStack* yystackp) { size_t yyi, yyj; yyi = yyj = 0; - while (yyj < yystack->yytops.yysize) + while (yyj < yystackp->yytops.yysize) { - if (yystack->yytops.yystates[yyi] == NULL) + if (yystackp->yytops.yystates[yyi] == NULL) { if (yyi == yyj) { YYDPRINTF ((stderr, "Removing dead stacks.\n")); } - yystack->yytops.yysize -= 1; + yystackp->yytops.yysize -= 1; } else { - yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi]; + 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", @@ -1239,118 +1321,133 @@ yyremoveDeletes (yyGLRStack* yystack) } /** Shift to a new state on stack #K of STACK, corresponding to LR state - * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */ + * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */ static inline void -yyglrShift (yyGLRStack* yystack, size_t yyk, yyStateNum yylrState, +yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, size_t yyposn, - YYSTYPE yysval, YYLTYPE* yylocp) + YYSTYPE* yyvalp, YYLTYPE* yylocp) { - yyGLRState* yynewState = &yynewGLRStackItem (yystack, yytrue)->yystate; + yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; yynewState->yylrState = yylrState; yynewState->yyposn = yyposn; yynewState->yyresolved = yytrue; - yynewState->yypred = yystack->yytops.yystates[yyk]; - yynewState->yysemantics.yysval = yysval; + yynewState->yypred = yystackp->yytops.yystates[yyk]; + yynewState->yysemantics.yysval = *yyvalp; yynewState->yyloc = *yylocp; - yystack->yytops.yystates[yyk] = yynewState; + yystackp->yytops.yystates[yyk] = yynewState; - YY_RESERVE_GLRSTACK (yystack); + YY_RESERVE_GLRSTACK (yystackp); } /** Shift stack #K of YYSTACK, to a new state corresponding to LR * state YYLRSTATE, at input position YYPOSN, with the (unresolved) - * semantic value of YYRHS under the action for YYRULE. */ + * semantic value of YYRHS under the action for YYRULE. */ static inline void -yyglrShiftDefer (yyGLRStack* yystack, size_t yyk, yyStateNum yylrState, +yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule) { - yyGLRState* yynewState = &yynewGLRStackItem (yystack, yytrue)->yystate; + yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; yynewState->yylrState = yylrState; yynewState->yyposn = yyposn; yynewState->yyresolved = yyfalse; - yynewState->yypred = yystack->yytops.yystates[yyk]; + yynewState->yypred = yystackp->yytops.yystates[yyk]; yynewState->yysemantics.yyfirstVal = NULL; - yystack->yytops.yystates[yyk] = yynewState; + yystackp->yytops.yystates[yyk] = yynewState; - /* Invokes YY_RESERVE_GLRSTACK. */ - yyaddDeferredAction (yystack, yynewState, rhs, yyrule); + /* Invokes YY_RESERVE_GLRSTACK. */ + yyaddDeferredAction (yystackp, yyk, yynewState, rhs, yyrule); } /** Pop the symbols consumed by reduction #RULE from the top of stack * #K of STACK, and perform the appropriate semantic action on their * semantic values. Assumes that all ambiguities in semantic values - * have been previously resolved. Set *VALP to the resulting value, + * have been previously resolved. Set *VALP to the resulting value, * and *LOCP to the computed location (if any). Return value is as - * for userAction. */ + * for userAction. */ static inline YYRESULTTAG -yydoAction (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule, +yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) { int yynrhs = yyrhsLength (yyrule); - if (yystack->yysplitPoint == NULL) + if (yystackp->yysplitPoint == NULL) { - /* Standard special case: single stack. */ - yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk]; + /* Standard special case: single stack. */ + yyGLRStackItem* rhs = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; YYASSERT (yyk == 0); - yystack->yynextFree -= yynrhs; - yystack->yyspaceLeft += yynrhs; - yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate; + yystackp->yynextFree -= yynrhs; + yystackp->yyspaceLeft += yynrhs; + yystackp->yytops.yystates[0] = & yystackp->yynextFree[-1].yystate; return yyuserAction (yyrule, yynrhs, rhs, - yyvalp, yylocp, yystack]b4_user_args[); + yyvalp, yylocp, yystackp]b4_user_args[); } else { /* At present, doAction is never called in nondeterministic * mode, so this branch is never taken. It is here in * anticipation of a future feature that will allow immediate - * evaluation of selected actions in nondeterministic mode. */ + * evaluation of selected actions in nondeterministic mode. */ int yyi; yyGLRState* yys; yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred - = yystack->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); } - yyupdateSplit (yystack, yys); - yystack->yytops.yystates[yyk] = yys; + yyupdateSplit (yystackp, yys); + yystackp->yytops.yystates[yyk] = yys; return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, - yyvalp, yylocp, yystack]b4_user_args[); + yyvalp, yylocp, yystackp]b4_user_args[); } } #if !YYDEBUG -# define YY_REDUCE_PRINT(K, Rule) +# define YY_REDUCE_PRINT(Args) #else -# define YY_REDUCE_PRINT(K, Rule) \ +# define YY_REDUCE_PRINT(Args) \ do { \ if (yydebug) \ - yy_reduce_print (K, Rule); \ -} while (/*CONSTCOND*/ 0) + yy_reduce_print Args; \ +} while (YYID (0)) /*----------------------------------------------------------. | Report that the RULE is going to be reduced on stack #K. | `----------------------------------------------------------*/ -static inline void -yy_reduce_print (size_t yyk, yyRuleNum yyrule) +/*ARGSUSED*/ static inline void +yy_reduce_print (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, + YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) { + int yynrhs = yyrhsLength (yyrule); + yybool yynormal __attribute__ ((__unused__)) = + (yystackp->yysplitPoint == NULL); + yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; + int yylow = 1; int yyi; - YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu), ", + 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, (unsigned long int) yyrline[yyrule]); - /* Print the symbols being reduced, and their result. */ - for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++) - YYFPRINTF (stderr, "%s ", yytokenName (yyrhs[yyi])); - YYFPRINTF (stderr, "-> %s\n", yytokenName (yyr1[yyrule])); + /* The symbols being reduced. */ + for (yyi = 0; yyi < yynrhs; yyi++) + { + YYFPRINTF (stderr, " $%d = ", yyi + 1); + yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], + &]b4_rhs_value(yynrhs, yyi + 1)[ + ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl + b4_user_args[); + YYFPRINTF (stderr, "\n"); + } } #endif @@ -1362,56 +1459,58 @@ yy_reduce_print (size_t yyk, yyRuleNum yyrule) * the new state. If the new state would have an identical input * position, LR state, and predecessor to an existing state on the stack, * it is identified with that existing state, eliminating stack #K from - * the STACK. In this case, the (necessarily deferred) semantic value is + * the STACK. In this case, the (necessarily deferred) semantic value is * added to the options for the existing state's semantic value. */ static inline YYRESULTTAG -yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule, - yybool yyforceEval]b4_user_formals[) +yyglrReduce (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, + yybool yyforceEval]b4_user_formals[) { - size_t yyposn = yystack->yytops.yystates[yyk]->yyposn; + size_t yyposn = yystackp->yytops.yystates[yyk]->yyposn; - if (yyforceEval || yystack->yysplitPoint == NULL) + if (yyforceEval || yystackp->yysplitPoint == NULL) { YYSTYPE yysval; YYLTYPE yyloc; - YY_REDUCE_PRINT (yyk, yyrule); - YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc]b4_user_args[)); - yyglrShift (yystack, yyk, - yyLRgotoState (yystack->yytops.yystates[yyk]->yylrState, + YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval, &yyloc]b4_user_args[)); + YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval, + &yyloc]b4_user_args[)); + YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc); + yyglrShift (yystackp, yyk, + yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState, yylhsNonterm (yyrule)), - yyposn, yysval, &yyloc); + yyposn, &yysval, &yyloc); } else { size_t yyi; int yyn; - yyGLRState* yys, *yys0 = yystack->yytops.yystates[yyk]; + yyGLRState* yys, *yys0 = yystackp->yytops.yystates[yyk]; yyStateNum yynewLRState; - for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule); + for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule); 0 < yyn; yyn -= 1) { yys = yys->yypred; YYASSERT (yys); } - yyupdateSplit (yystack, 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", + "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n", (unsigned long int) yyk, yyrule - 1, yynewLRState)); - for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) - if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL) + for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1) + if (yyi != yyk && yystackp->yytops.yystates[yyi] != NULL) { - yyGLRState* yyp, *yysplit = yystack->yysplitPoint; - yyp = yystack->yytops.yystates[yyi]; + 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 (yystack, yyp, yys0, yyrule); - yymarkStackDeleted (yystack, yyk); + 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)); @@ -1420,41 +1519,59 @@ yyglrReduce (yyGLRStack* yystack, size_t yyk, yyRuleNum yyrule, yyp = yyp->yypred; } } - yystack->yytops.yystates[yyk] = yys; - yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule); + yystackp->yytops.yystates[yyk] = yys; + yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule); } return yyok; } static size_t -yysplitStack (yyGLRStack* yystack, size_t yyk) +yysplitStack (yyGLRStack* yystackp, size_t yyk) { - if (yystack->yysplitPoint == NULL) + if (yystackp->yysplitPoint == NULL) { YYASSERT (yyk == 0); - yystack->yysplitPoint = yystack->yytops.yystates[yyk]; + yystackp->yysplitPoint = yystackp->yytops.yystates[yyk]; } - if (yystack->yytops.yysize >= yystack->yytops.yycapacity) + if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity) { yyGLRState** yynewStates; - if (! ((yystack->yytops.yycapacity - <= (YYSIZEMAX / (2 * sizeof yynewStates[0]))) - && (yynewStates = - (yyGLRState**) YYREALLOC (yystack->yytops.yystates, - ((yystack->yytops.yycapacity *= 2) - * sizeof yynewStates[0]))))) - yyMemoryExhausted (yystack); - yystack->yytops.yystates = yynewStates; + 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; } - yystack->yytops.yystates[yystack->yytops.yysize] - = yystack->yytops.yystates[yyk]; - yystack->yytops.yysize += 1; - return yystack->yytops.yysize-1; + yystackp->yytops.yystates[yystackp->yytops.yysize] + = yystackp->yytops.yystates[yyk]; + yystackp->yytops.yylookaheadNeeds[yystackp->yytops.yysize] + = yystackp->yytops.yylookaheadNeeds[yyk]; + yystackp->yytops.yysize += 1; + return yystackp->yytops.yysize-1; } /** True iff Y0 and Y1 represent identical options at the top level. * That is, they represent the same rule applied to RHS symbols - * that produce the same terminal symbols. */ + * that produce the same terminal symbols. */ static yybool yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1) { @@ -1475,7 +1592,7 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1) } /** Assuming identicalOptions (Y0,Y1), destructively merge the - * alternative semantic values for the RHS-symbols of Y1 and Y0. */ + * alternative semantic values for the RHS-symbols of Y1 and Y0. */ static void yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) { @@ -1504,7 +1621,7 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) yySemanticOption* yyz1; yyz0p = &yys0->yysemantics.yyfirstVal; yyz1 = yys1->yysemantics.yyfirstVal; - while (yytrue) + while (YYID (yytrue)) { if (yyz1 == *yyz0p || yyz1 == NULL) break; @@ -1529,7 +1646,7 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) /** Y0 and Y1 represent two possible actions to take in a given * parsing state; return 0 if no combination is possible, - * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */ + * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */ static int yypreference (yySemanticOption* y0, yySemanticOption* y1) { @@ -1552,49 +1669,71 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1) return 0; } -static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList, - yyGLRStack* yystack, 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* yystack]b4_user_formals[) +yyresolveStates (yyGLRState* yys, int yyn, + yyGLRStack* yystackp]b4_user_formals[) { - YYRESULTTAG yyflag; if (0 < yyn) { YYASSERT (yys->yypred); - yyflag = yyresolveStates (yys->yypred, yyn-1, yystack]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, yystack, - &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* yystack, - YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) +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, yystack]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. */ + /* Set default location. */ yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[ - return yyuserAction (yyopt->yyrule, yynrhs, - yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, - yyvalp, yylocp, yystack]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 @@ -1604,7 +1743,7 @@ 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) @@ -1620,11 +1759,11 @@ 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) { @@ -1645,12 +1784,9 @@ yyreportTree (yySemanticOption* yyx, int yyindent) } #endif -static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystack]b4_pure_formals[) - __attribute__ ((__noreturn__)); -static void -yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystack]b4_pure_formals[) +/*ARGSUSED*/ static YYRESULTTAG +yyreportAmbiguity (yySemanticOption* yyx0, + yySemanticOption* yyx1]b4_pure_formals[) { YYUSE (yyx0); YYUSE (yyx1); @@ -1663,19 +1799,85 @@ yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, yyreportTree (yyx1, 2); YYFPRINTF (stderr, "\n"); #endif - yyFail (yystack][]b4_pure_args[, YY_("syntax is ambiguous")); -} + yyerror (]b4_yyerror_args[YY_("syntax is ambiguous")); + return yyabort; +}]b4_locations_if([[ -/** Resolve the ambiguity represented by OPTIONLIST, perform the indicated - * actions, and return the result. */ +/** 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 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* yystack, - 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; @@ -1692,8 +1894,9 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack, { switch (yypreference (yybest, yyp)) { - case 0: - yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[); + case 0:]b4_locations_if([[ + yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[ + return yyreportAmbiguity (yybest, yyp]b4_pure_args[); break; case 1: yymerge = yytrue; @@ -1706,7 +1909,7 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack, break; default: /* This cannot happen so it is not worth a YYASSERT (yyfalse), - but some compilers complain if the default case is + but some compilers complain if the default case is omitted. */ break; } @@ -1718,84 +1921,100 @@ yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack, { yySemanticOption* yyp; int yyprec = yydprec[yybest->yyrule]; - YYCHK (yyresolveAction (yybest, yystack, 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, yystack, &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 - return yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[); + yyflag = yyresolveAction (yybest, yystackp, &yysval, yylocp]b4_user_args[); + + if (yyflag == yyok) + { + yys->yyresolved = yytrue; + yys->yysemantics.yysval = yysval; + } + else + yys->yysemantics.yyfirstVal = NULL; + return yyflag; } static YYRESULTTAG -yyresolveStack (yyGLRStack* yystack]b4_user_formals[) +yyresolveStack (yyGLRStack* yystackp]b4_user_formals[) { - if (yystack->yysplitPoint != NULL) + if (yystackp->yysplitPoint != NULL) { yyGLRState* yys; int yyn; - for (yyn = 0, yys = yystack->yytops.yystates[0]; - yys != yystack->yysplitPoint; + for (yyn = 0, yys = yystackp->yytops.yystates[0]; + yys != yystackp->yysplitPoint; yys = yys->yypred, yyn += 1) continue; - YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack + YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp ]b4_user_args[)); } return yyok; } static void -yycompressStack (yyGLRStack* yystack) +yycompressStack (yyGLRStack* yystackp) { yyGLRState* yyp, *yyq, *yyr; - if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL) + if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == NULL) return; - for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL; - yyp != yystack->yysplitPoint; + for (yyp = yystackp->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL; + yyp != yystackp->yysplitPoint; yyr = yyp, yyp = yyq, yyq = yyp->yypred) yyp->yypred = yyr; - yystack->yyspaceLeft += yystack->yynextFree - yystack->yyitems; - yystack->yynextFree = ((yyGLRStackItem*) yystack->yysplitPoint) + 1; - yystack->yyspaceLeft -= yystack->yynextFree - yystack->yyitems; - yystack->yysplitPoint = NULL; - yystack->yylastDeleted = NULL; + yystackp->yyspaceLeft += yystackp->yynextFree - yystackp->yyitems; + yystackp->yynextFree = ((yyGLRStackItem*) yystackp->yysplitPoint) + 1; + yystackp->yyspaceLeft -= yystackp->yynextFree - yystackp->yyitems; + yystackp->yysplitPoint = NULL; + yystackp->yylastDeleted = NULL; while (yyr != NULL) { - yystack->yynextFree->yystate = *yyr; + yystackp->yynextFree->yystate = *yyr; yyr = yyr->yypred; - yystack->yynextFree->yystate.yypred = & yystack->yynextFree[-1].yystate; - yystack->yytops.yystates[0] = &yystack->yynextFree->yystate; - yystack->yynextFree += 1; - yystack->yyspaceLeft -= 1; + yystackp->yynextFree->yystate.yypred = &yystackp->yynextFree[-1].yystate; + yystackp->yytops.yystates[0] = &yystackp->yynextFree->yystate; + yystackp->yynextFree += 1; + yystackp->yyspaceLeft -= 1; } } static YYRESULTTAG -yyprocessOneStack (yyGLRStack* yystack, size_t yyk, - size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp - ]b4_pure_formals[) +yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, + size_t yyposn]b4_pure_formals[) { int yyaction; const short int* yyconflicts; yyRuleNum yyrule; - yySymbol* const yytokenp = yystack->yytokenp; - while (yystack->yytops.yystates[yyk] != NULL) + while (yystackp->yytops.yystates[yyk] != NULL) { - yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState; + yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState; YYDPRINTF ((stderr, "Stack %lu Entering state %d\n", (unsigned long int) yyk, yystate)); @@ -1808,257 +2027,292 @@ yyprocessOneStack (yyGLRStack* yystack, size_t yyk, { YYDPRINTF ((stderr, "Stack %lu dies.\n", (unsigned long int) yyk)); - yymarkStackDeleted (yystack, yyk); + yymarkStackDeleted (yystackp, yyk); return yyok; } - YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse]b4_user_args[)); + YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[)); } 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, yylvalp, yyllocp); } - 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) { - size_t yynewStack = yysplitStack (yystack, yyk); + 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 (yystack, yynewStack, + YYCHK (yyglrReduce (yystackp, yynewStack, *yyconflicts, yyfalse]b4_user_args[)); - YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn, - yylvalp, yyllocp]b4_pure_args[)); + YYCHK (yyprocessOneStack (yystackp, yynewStack, + yyposn]b4_pure_args[)); yyconflicts += 1; } if (yyisShiftAction (yyaction)) - { - YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yyk)); - YY_SYMBOL_PRINT ("shifting", *yytokenp, yylvalp, yyllocp); - yyglrShift (yystack, yyk, yyaction, yyposn+1, - *yylvalp, yyllocp); - YYDPRINTF ((stderr, "Stack %lu now in state #%d\n", - (unsigned long int) yyk, - yystack->yytops.yystates[yyk]->yylrState)); - break; - } + break; else if (yyisErrorAction (yyaction)) { YYDPRINTF ((stderr, "Stack %lu dies.\n", (unsigned long int) yyk)); - yymarkStackDeleted (yystack, yyk); + yymarkStackDeleted (yystackp, yyk); break; } else - YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse]b4_user_args[)); + YYCHK (yyglrReduce (yystackp, yyk, -yyaction, + yyfalse]b4_user_args[)); } } return yyok; } -static void -yyreportSyntaxError (yyGLRStack* yystack, - YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[) +/*ARGSUSED*/ static void +yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { - YYUSE (yylvalp); - YYUSE (yyllocp); + 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 (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]; + /* Number of reported tokens (one for the "unexpected", one per + "expected"). */ + int yycount = 0; + + /* There are many possibilities here to consider: + - If this state is a consistent state with a default action, then + the only way this function was invoked is if the default action + is an error action. In that case, don't check for expected + tokens because there are none. + - The only way there can be no lookahead present (in yychar) is if + this state is a consistent state with a default action. Thus, + detecting the absence of a lookahead is sufficient to determine + that there is no unexpected or expected token to report. In that + case, just report a simple "syntax error". + - Don't assume there isn't a lookahead just because this state is a + consistent state with a default action. There might have been a + previous inconsistent state, consistent state with a non-default + action, or user semantic action that manipulated yychar. + - Of course, the expected token list depends on states to have + correct lookahead information, and it depends on the parser not + to perform extra reductions after fetching a lookahead from the + scanner and before detecting a syntax error. Thus, state merging + (from LALR or IELR) and default reductions corrupt the expected + token list. However, the list is correct for canonical LR with + one exception: it will still contain any token that will not be + accepted due to an error action in a later state. + */ + if (yytoken != YYEMPTY) + { + int yyn = yypact[yystackp->yytops.yystates[0]->yylrState]; + yyarg[yycount++] = yytokenName (yytoken); + if (!yypact_value_is_default (yyn)) + { + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. In other words, skip the first -YYN actions for this + state because they are default actions. */ + int yyxbegin = yyn < 0 ? -yyn : 0; + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = YYLAST - yyn + 1; + int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; + int yyx; + for (yyx = yyxbegin; yyx < yyxend; ++yyx) + if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR + && !yytable_value_is_error (yytable[yyx + yyn])) + { + if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) + { + yycount = 1; + yysize = yysize0; + break; + } + yyarg[yycount++] = yytokenName (yyx); + yysize1 = yysize + yytnamerr (NULL, yytokenName (yyx)); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; + } + } + } - if (yystack->yyerrState == 0) + switch (yycount) { -#if YYERROR_VERBOSE - yySymbol* const yytokenp = yystack->yytokenp; - int yyn; - yyn = yypact[yystack->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; - } +#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_ + } - yyf = YY_(yyformat); - yysize1 = yysize + strlen (yyf); - yysize_overflow |= yysize1 < yysize; - yysize = yysize1; + yysize1 = yysize + strlen (yyformat); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; - if (!yysize_overflow) - yymsg = (char *) YYMALLOC (yysize); + 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 (yystack); - } - } - else -#endif /* YYERROR_VERBOSE */ - yyerror (]b4_lyyerror_args[YY_("syntax error")); - yynerrs += 1; + 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 YYSTACK, assuming that YYTOKENP, - YYLVALP, and YYLLOCP point to the syntactic category, semantic - value, and location of the look-ahead. */ -static void -yyrecoverSyntaxError (yyGLRStack* yystack, - YYSTYPE* yylvalp, - YYLTYPE* YYOPTIONAL_LOC (yyllocp) - ]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 lookahead. */ +/*ARGSUSED*/ static void +yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { - yySymbol* const yytokenp = yystack->yytokenp; size_t yyk; int yyj; - if (yystack->yyerrState == 3) + if (yystackp->yyerrState == 3) /* We just shifted the error token and (perhaps) took some reductions. Skip tokens until we can proceed. */ - while (yytrue) + while (YYID (yytrue)) { - if (*yytokenp == YYEOF) - yyFail (yystack][]b4_lpure_args[, NULL); - if (*yytokenp != YYEMPTY) - {]b4_location_if([[ + yySymbol yytoken; + if (yychar == YYEOF) + yyFail (yystackp][]b4_lpure_args[, 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 = yystack->yytops.yystates[0]; + 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 = *yyllocp; - YYLLOC_DEFAULT (yys->yyloc, yyerror_range, 2);]])[ + yyerror_range[2].yystate.yyloc = yylloc; + YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[ + yytoken = YYTRANSLATE (yychar); yydestruct ("Error: discarding", - *yytokenp, yylvalp]b4_location_if([, yyllocp])[]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, yylvalp, yyllocp); - yyj = yypact[yystack->yytops.yystates[0]->yylrState]; - if (yyis_pact_ninf (yyj)) + 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 += *yytokenp; - if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp) + yyj += yytoken; + if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken) { - if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0) + if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0) return; } - else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj])) + else if (! yytable_value_is_error (yytable[yyj])) return; } /* Reduce to one stack. */ - for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1) - if (yystack->yytops.yystates[yyk] != NULL) + for (yyk = 0; yyk < yystackp->yytops.yysize; yyk += 1) + if (yystackp->yytops.yystates[yyk] != NULL) break; - if (yyk >= yystack->yytops.yysize) - yyFail (yystack][]b4_lpure_args[, NULL); - for (yyk += 1; yyk < yystack->yytops.yysize; yyk += 1) - yymarkStackDeleted (yystack, yyk); - yyremoveDeletes (yystack); - yycompressStack (yystack); - - /* Now pop stack until we find a state that shifts the error token. */ - yystack->yyerrState = 3; - while (yystack->yytops.yystates[0] != NULL) + if (yyk >= yystackp->yytops.yysize) + yyFail (yystackp][]b4_lpure_args[, NULL); + for (yyk += 1; yyk < yystackp->yytops.yysize; yyk += 1) + yymarkStackDeleted (yystackp, yyk); + yyremoveDeletes (yystackp); + yycompressStack (yystackp); + + /* Now pop stack until we find a state that shifts the error token. */ + yystackp->yyerrState = 3; + while (yystackp->yytops.yystates[0] != NULL) { - yyGLRState *yys = yystack->yytops.yystates[0]; + yyGLRState *yys = yystackp->yytops.yystates[0]; yyj = yypact[yys->yylrState]; - if (! yyis_pact_ninf (yyj)) + if (! yypact_value_is_default (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([[ - yystack->yyerror_range[2].yystate.yyloc = *yyllocp; - YYLLOC_DEFAULT (yyerrloc, yystack->yyerror_range, 2);]])[ + YYLTYPE yyerrloc;]b4_locations_if([[ + yystackp->yyerror_range[2].yystate.yyloc = yylloc; + YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[ YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]], - yylvalp, &yyerrloc); - yyglrShift (yystack, 0, yytable[yyj], - yys->yyposn, *yylvalp, &yyerrloc); - yys = yystack->yytops.yystates[0]; + &yylval, &yyerrloc); + yyglrShift (yystackp, 0, yytable[yyj], + yys->yyposn, &yylval, &yyerrloc); + yys = yystackp->yytops.yystates[0]; break; } } -]b4_location_if([[ yystack->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[ - yydestroyGLRState ("Error: popping", yys]b4_user_args[); - yystack->yytops.yystates[0] = yys->yypred; - yystack->yynextFree -= 1; - yystack->yyspaceLeft += 1; +]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; } - if (yystack->yytops.yystates[0] == NULL) - yyFail (yystack][]b4_lpure_args[, NULL); + if (yystackp->yytops.yystates[0] == NULL) + yyFail (yystackp][]b4_lpure_args[, NULL); } #define YYCHK1(YYE) \ @@ -2075,7 +2329,7 @@ yyrecoverSyntaxError (yyGLRStack* yystack, default: \ goto yybuglab; \ } \ - } while (/*CONSTCOND*/ 0) + } while (YYID (0)) /*----------. @@ -2085,41 +2339,29 @@ yyrecoverSyntaxError (yyGLRStack* yystack, ]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[ { int yyresult; - yySymbol yytoken; yyGLRStack yystack; + yyGLRStack* const yystackp = &yystack; size_t yyposn; -]b4_pure_if( -[ - YYSTYPE yylval; - YYLTYPE yylloc; - #undef yychar - #define yychar (yystack.yyrawchar) -])[ - - YYSTYPE* const yylvalp = &yylval; - YYLTYPE* const yyllocp = &yylloc; YYDPRINTF ((stderr, "Starting parse\n")); - yytoken = YYEMPTY; + yychar = 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 + /* User initialization code. */ + 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 (&yystack, YYINITDEPTH)) + if (! yyinitGLRStack (yystackp, YYINITDEPTH)) goto yyexhaustedlab; switch (YYSETJMP (yystack.yyexception_buffer)) { @@ -2128,24 +2370,23 @@ 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, &yylloc); yyposn = 0; - while (yytrue) + while (YYID (yytrue)) { /* For efficiency, we have two loops, the first of which is specialized to deterministic operation (single stack, no potential ambiguity). */ /* Standard mode */ - while (yytrue) + 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)); + YYDPRINTF ((stderr, "Entering state %d\n", yystate)); if (yystate == YYFINAL) goto yyacceptlab; if (yyisDefaultedState (yystate)) @@ -2153,38 +2394,48 @@ b4_syncline([@oline@], [@ofile@])])dnl yyrule = yydefaultAction (yystate); if (yyrule == 0) { -]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = *yyllocp;]])[ - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); +]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 { - 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, yylvalp, yyllocp); + 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, yylvalp, yyllocp); - if (yytoken != YYEOF) - yytoken = YYEMPTY; + YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); + yychar = YYEMPTY; yyposn += 1; - yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp); + 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 = *yyllocp;]])[ - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ + yyreportSyntaxError (&yystack]b4_user_args[); goto yyuser_error; } else @@ -2192,15 +2443,35 @@ b4_syncline([@oline@], [@ofile@])])dnl } } - while (yytrue) + while (YYID (yytrue)) { + yySymbol yytoken_to_shift; size_t yys; - size_t yyn = yystack.yytops.yysize; - for (yys = 0; yys < yyn; yys += 1) - YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn, - yylvalp, yyllocp]b4_lpure_args[)); - yytoken = YYEMPTY; - yyposn += 1; + + 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) { @@ -2209,11 +2480,37 @@ b4_syncline([@oline@], [@ofile@])])dnl 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 = *yyllocp;]])[ - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ + yyreportSyntaxError (&yystack]b4_user_args[); goto yyuser_error; } - else if (yystack.yytops.yysize == 1) + + /* 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, &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")); @@ -2223,7 +2520,7 @@ b4_syncline([@oline@], [@ofile@])])dnl } continue; yyuser_error: - yyrecoverSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); + yyrecoverSyntaxError (&yystack]b4_user_args[); yyposn = yystack.yytops.yystates[0]->yyposn; } @@ -2233,7 +2530,7 @@ b4_syncline([@oline@], [@ofile@])])dnl yybuglab: YYASSERT (yyfalse); - /* Fall through. */ + goto yyabortlab; yyabortlab: yyresult = 1; @@ -2242,12 +2539,13 @@ b4_syncline([@oline@], [@ofile@])])dnl yyexhaustedlab: yyerror (]b4_lyyerror_args[YY_("memory exhausted")); yyresult = 2; - /* Fall through. */ + goto yyreturn; yyreturn: - if (yytoken != YYEOF && yytoken != YYEMPTY) + if (yychar != YYEMPTY) yydestruct ("Cleanup: discarding lookahead", - yytoken, yylvalp]b4_location_if([, yyllocp])[]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 @@ -2256,26 +2554,37 @@ b4_syncline([@oline@], [@ofile@])])dnl { yyGLRState** yystates = yystack.yytops.yystates; if (yystates) - while (yystates[0]) - { - yyGLRState *yys = yystates[0]; -]b4_location_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]] -)[ yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); - yystates[0] = yys->yypred; - yystack.yynextFree -= 1; - yystack.yyspaceLeft += 1; - } + { + 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 != 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 -static void yypstack (yyGLRStack* yystack, size_t yyk) +#if YYDEBUG +static void yypstack (yyGLRStack* yystackp, size_t yyk) __attribute__ ((__unused__)); -static void yypdumpstack (yyGLRStack* yystack) __attribute__ ((__unused__)); +static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__)); static void yy_yypstack (yyGLRState* yys) @@ -2283,106 +2592,87 @@ 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 -yypstack (yyGLRStack* yystack, size_t yyk) +yypstack (yyGLRStack* yystackp, size_t yyk) { - yypstates (yystack->yytops.yystates[yyk]); + yypstates (yystackp->yytops.yystates[yyk]); } #define YYINDEX(YYX) \ - ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems) + ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystackp->yyitems) static void -yypdumpstack (yyGLRStack* yystack) +yypdumpstack (yyGLRStack* yystackp) { yyGLRStackItem* yyp; size_t yyi; - for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1) + for (yyp = yystackp->yyitems; yyp < yystackp->yynextFree; yyp += 1) { - fprintf (stderr, "%3lu. ", (unsigned long int) (yyp - yystack->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:"); - for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) - fprintf (stderr, "%lu: %ld; ", (unsigned long int) yyi, - (long int) YYINDEX (yystack->yytops.yystates[yyi])); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "Tops:"); + for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1) + YYFPRINTF (stderr, "%lu: %ld; ", (unsigned long int) yyi, + (long int) YYINDEX (yystackp->yytops.yystates[yyi])); + YYFPRINTF (stderr, "\n"); } #endif ] 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]) +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], + [2002-2011]) -b4_token_enums(b4_tokens) - -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_file_name]) -typedef union m4_bregexp(b4_stype, [^{], [YYSTYPE ])b4_stype YYSTYPE; -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@])], -[typedef int YYSTYPE;]) -# define YYSTYPE_IS_DECLARED 1 -# define YYSTYPE_IS_TRIVIAL 1 -#endif +b4_shared_declarations b4_pure_if([], -[extern YYSTYPE b4_prefix[]lval;]) +[[extern YYSTYPE ]b4_prefix[lval;]]) -#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_location_if([b4_pure_if([], -[extern YYLTYPE b4_prefix[]lloc;]) -]) +b4_locations_if([b4_pure_if([], +[extern YYLTYPE ]b4_prefix[lloc;]) ]) +])]) +m4_divert_pop(0)