X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1d2d7eddf73d4244900ea00fe1949c56db07a2f7..95361618dee181507d53f47de2dd50c667b84007:/data/glr.c diff --git a/data/glr.c b/data/glr.c index d04edbd0..699d7304 100644 --- a/data/glr.c +++ b/data/glr.c @@ -1,24 +1,25 @@ -m4_divert(-1) -*- C -*- + -*- C -*- # GLR skeleton for Bison -# Copyright (C) 2002, 2003 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., 59 Temple Place, Suite 330, Boston, MA -# 02111-1307 USA +# along with this program. If not, see . +m4_include(b4_pkgdatadir/[c.m4]) + ## ---------------- ## ## Default values. ## ## ---------------- ## @@ -33,65 +34,84 @@ m4_define_default([b4_stack_depth_init], [200]) ## Pure/impure interfaces. ## ## ------------------------ ## +b4_define_flag_if([pure]) +# If glr.cc is including this file and thus has already set b4_pure_flag, +# do not change the value of b4_pure_flag, and do not record a use of api.pure. +m4_ifndef([b4_pure_flag], +[b4_percent_define_default([[api.pure]], [[false]]) + m4_define([b4_pure_flag], + [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])])]) + +# b4_user_formals +# --------------- +# The possible parse-params formal arguments preceded by a comma. +# +# This is not shared with yacc.c in c.m4 because GLR relies on ISO C +# formal argument declarations. +m4_define([b4_user_formals], +[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_param)])]) + # b4_lex_param # ------------ # 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_user_formals -# --------------- -m4_define([b4_user_formals], -[m4_ifset([b4_parse_param], [, b4_c_ansi_formals(b4_parse_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 lookahead, 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_if([b4_locations_if([, yylocp])])[]b4_user_args]) + + +# b4_lpure_args +# ------------- +# Same as above, but on the lookahead, hence &yylloc instead of yylocp. +m4_define([b4_lpure_args], +[b4_pure_if([b4_locations_if([, &yylloc])])[]b4_user_args]) + # b4_pure_formals # --------------- -# Arguments passed to yyerror: user formals plus yyllocp. +# Arguments passed to yyerror: user formals plus yylocp with leading comma. m4_define([b4_pure_formals], -[b4_pure_if([b4_location_if([, YYLTYPE *yylocp])])[]b4_user_formals]) +[b4_pure_if([b4_locations_if([, YYLTYPE *yylocp])])[]b4_user_formals]) -# b4_lpure_args -# ------------- -# Same as above, but on the lookahead, hence yyllocp instead of yylocp. -m4_define([b4_lpure_args], -[b4_pure_if([b4_location_if([, yyllocp])])[]b4_user_args]) +# b4_locuser_formals(LOC = yylocp) +# -------------------------------- +m4_define([b4_locuser_formals], +[b4_locations_if([, YYLTYPE *m4_default([$1], [yylocp])])[]b4_user_formals]) -# b4_lpure_formals -# ---------------- -# Same as above, but on the lookahead, hence yyllocp instead of yylocp. -m4_define([b4_lpure_formals], -[b4_pure_if([b4_location_if([YYLTYPE *yyllocp])])[]b4_user_formals]) +# b4_locuser_args(LOC = yylocp) +# ----------------------------- +m4_define([b4_locuser_args], +[b4_locations_if([, m4_default([$1], [yylocp])])[]b4_user_args]) + ## ----------------- ## @@ -103,7 +123,7 @@ m4_define([b4_lpure_formals], # -------------------- # Expansion of $$. m4_define([b4_lhs_value], -[(*yyvalp)[]m4_ifval([$1], [.$1])]) +[((*yyvalp)[]m4_ifval([$1], [.$1]))]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) @@ -111,7 +131,7 @@ m4_define([b4_lhs_value], # Expansion of $NUM, where the current rule has RULE-LENGTH # symbols on RHS. m4_define([b4_rhs_value], -[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]))]) @@ -131,90 +151,126 @@ m4_define([b4_lhs_location], # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], -[yyvsp@{YYFILL (m4_eval([$2 - $1]))@}.yystate.yyloc]) +[(((yyGLRStackItem const *)yyvsp)@{YYFILL (($2) - ($1))@}.yystate.yyloc)]) + + +## -------------- ## +## Declarations. ## +## -------------- ## + +# b4_shared_declarations +# ---------------------- +# Declaration that might either go into the header (if --defines) +# or open coded in the parser body. +m4_define([b4_shared_declarations], +[b4_declare_yydebug[ +]b4_percent_code_get([[requires]])[ +]b4_token_enums(b4_tokens)[ +]b4_declare_yylstype[ +]b4_c_ansi_function_decl(b4_prefix[parse], [int], b4_parse_param)[ +]b4_percent_code_get([[provides]])[]dnl +]) + + +## -------------- ## +## Output files. ## +## -------------- ## # 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]) +m4_divert_push(0)dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison GLR parsers in C], + [2002-2012]) [ -/* This is the parser code for GLR (Generalized LR) parser. */ - -#include -#include -#include -#include -#include +/* C GLR parser skeleton written by Paul Hilfinger. */ ]b4_identification -m4_if(b4_prefix[], [yy], [], -[/* If NAME_PREFIX is specified substitute the variables and functions - names. */ -#define yyparse b4_prefix[]parse -#define yylex b4_prefix[]lex -#define yyerror b4_prefix[]error -#define yylval b4_prefix[]lval -#define yychar b4_prefix[]char -#define yydebug b4_prefix[]debug -#define yynerrs b4_prefix[]nerrs -b4_location_if([#define yylloc b4_prefix[]lloc])]) - -b4_token_defines(b4_tokens) + +b4_percent_code_get([[top]])[ +]m4_if(b4_prefix, [yy], [], +[[/* Substitute the variable and function names. */ +#define yyparse ]b4_prefix[parse +#define yylex ]b4_prefix[lex +#define yyerror ]b4_prefix[error +#define yylval ]b4_prefix[lval +#define yychar ]b4_prefix[char +#define yydebug ]b4_prefix[debug +#define yynerrs ]b4_prefix[nerrs]b4_locations_if([[ +#define yylloc ]b4_prefix[lloc]])])[ /* Copy the first part of user declarations. */ -b4_pre_prologue[ +]b4_user_pre_prologue[ -/* Enabling traces. */ -#ifndef YYDEBUG -# define YYDEBUG ]b4_debug[ -#endif +]b4_null_define[ + +]b4_defines_if([[#include "@basename(]b4_spec_defines_file[@)"]], + [b4_shared_declarations])[ /* Enabling verbose error messages. */ #ifdef YYERROR_VERBOSE # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else -# define YYERROR_VERBOSE ]b4_error_verbose[ +# define YYERROR_VERBOSE ]b4_error_verbose_flag[ #endif -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -]m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_filename]) -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 +/* Default (constant) value used for initialization for null + right-hand sides. Unlike the standard yacc.c template, + here we set the default value of $$ to a zeroed-out value. + Since the default value is undefined, this behavior is + technically correct. */ +static YYSTYPE yyval_default; + +/* Copy the second part of user declarations. */ +]b4_user_post_prologue +b4_percent_code_get[]dnl + +[#include +#include +#include + +#ifndef YY_ +# if defined YYENABLE_NLS && YYENABLE_NLS +# if ENABLE_NLS +# include /* INFRINGES ON USER NAME SPACE */ +# define YY_(msgid) dgettext ("bison-runtime", msgid) +# endif +# endif +# ifndef YY_ +# define YY_(msgid) msgid +# endif +#endif + +/* Suppress unused-variable warnings by "using" E. */ +#if ! defined lint || defined __GNUC__ +# define YYUSE(e) ((void) (e)) +#else +# define YYUSE(e) /* empty */ #endif -#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED) -typedef struct YYLTYPE +/* 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]])[ { - int first_line; - int first_column; - int last_line; - int last_column; -} YYLTYPE; -# define YYLTYPE_IS_DECLARED 1 -# define YYLTYPE_IS_TRIVIAL 1 + return i; +} #endif -/* Default (constant) values used for initialization for null - right-hand sides. Unlike the standard yacc.c template, - here we set the default values of $$ and $@@ to zeroed-out - values. Since the default value of these quantities is undefined, - this behavior is technically correct. */ -static YYSTYPE yyval_default; -static YYLTYPE yyloc_default; +#ifndef YYFREE +# define YYFREE free +#endif +#ifndef YYMALLOC +# define YYMALLOC malloc +#endif +#ifndef YYREALLOC +# define YYREALLOC realloc +#endif -/* Copy the second part of user declarations. */ -]b4_post_prologue[ +#define YYSIZEMAX ((size_t) -1) -]/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@]) -[ #ifdef __cplusplus typedef bool yybool; #else @@ -223,45 +279,61 @@ b4_syncline([@oline@], [@ofile@]) #define yytrue 1 #define yyfalse 0 +#ifndef YYSETJMP +# include +# define YYJMP_BUF jmp_buf +# define YYSETJMP(env) setjmp (env) +# define YYLONGJMP(env, val) longjmp (env, val) +#endif + /*-----------------. | GCC extensions. | `-----------------*/ #ifndef __attribute__ /* This feature is available in gcc versions 2.5 and later. */ -# if !defined (__GNUC__) || __GNUC__ < 2 || \ -(__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__ +# if (! defined __GNUC__ || __GNUC__ < 2 \ + || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)) # define __attribute__(Spec) /* empty */ # endif #endif -#ifndef ATTRIBUTE_UNUSED -# define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) +]b4_locations_if([#define YYOPTIONAL_LOC(Name) Name],[ +#ifdef __cplusplus +# define YYOPTIONAL_LOC(Name) /* empty */ +#else +# define YYOPTIONAL_LOC(Name) Name __attribute__ ((__unused__)) +#endif])[ + +#ifndef YYASSERT +# 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. */ +#define YYMAXLEFT ]b4_max_left_semantic_context[ /* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */ #define YYUNDEFTOK ]b4_undef_token_number[ #define YYMAXUTOK ]b4_user_token_number_max[ -#define YYTRANSLATE(YYX) \ - ((YYX <= 0) ? YYEOF : \ - (unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) +#define YYTRANSLATE(YYX) \ + ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ static const ]b4_int_type_for([b4_translate])[ yytranslate[] = @@ -277,7 +349,7 @@ 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[ @@ -290,9 +362,9 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] = }; #endif -#if (YYDEBUG) || YYERROR_VERBOSE -/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. - First, the terminals, then, starting at YYNTOKENS, nonterminals. */ +#if YYDEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[ +/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. + First, the terminals, then, starting at YYNTOKENS, nonterminals. */ static const char *const yytname[] = { ]b4_tname[ @@ -311,27 +383,27 @@ 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[ @@ -353,8 +425,7 @@ static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which - number is the opposite. If zero, do what YYDEFACT says. - If YYTABLE_NINF, syntax error. */ + number is the opposite. If YYTABLE_NINF, syntax error. */ #define YYTABLE_NINF ]b4_table_ninf[ static const ]b4_int_type_for([b4_table])[ yytable[] = { @@ -373,9 +444,9 @@ static const ]b4_int_type_for([b4_conflict_list_heads])[ yyconflp[] = /* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by 0, pointed into by YYCONFLP. */ ]dnl Do not use b4_int_type_for here, since there are places where -dnl pointers onto yyconfl are taken, which type is "short *". +dnl pointers onto yyconfl are taken, which type is "short int *". dnl We probably ought to introduce a type for confl. -[static const short yyconfl[] = +[static const short int yyconfl[] = { ]b4_conflicting_rules[ }; @@ -393,37 +464,74 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = }; -/* Prevent warning if -Wmissing-prototypes. */ -]b4_c_ansi_function_decl([yyparse], [int], b4_parse_param)[ - /* Error token number */ #define YYTERROR 1 -/* YYLLOC_DEFAULT -- Compute the default location (before the actions - are run). */ - -#define YYRHSLOC(yyRhs,YYK) (yyRhs[YYK].yystate.yyloc) +/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. + If N is 0, then set CURRENT to the empty location which ends + the previous symbol: RHS[0] (always defined). */ +]b4_locations_if([[ +#define YYRHSLOC(Rhs, K) ((Rhs)[K].yystate.yyloc) #ifndef YYLLOC_DEFAULT -# define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN) \ - yyCurrent.first_line = YYRHSLOC(yyRhs,1).first_line; \ - yyCurrent.first_column = YYRHSLOC(yyRhs,1).first_column; \ - yyCurrent.last_line = YYRHSLOC(yyRhs,YYN).last_line; \ - yyCurrent.last_column = YYRHSLOC(yyRhs,YYN).last_column; +# define YYLLOC_DEFAULT(Current, Rhs, N) \ + do \ + if (YYID (N)) \ + { \ + (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ + (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ + (Current).last_line = YYRHSLOC (Rhs, N).last_line; \ + (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ + } \ + else \ + { \ + (Current).first_line = (Current).last_line = \ + YYRHSLOC (Rhs, 0).last_line; \ + (Current).first_column = (Current).last_column = \ + YYRHSLOC (Rhs, 0).last_column; \ + } \ + while (YYID (0)) + +/* YY_LOCATION_PRINT -- Print the location on the stream. + This macro was not mandated originally: define only if we know + we won't break user code: when these are the locations we know. */ + +# define YY_LOCATION_PRINT(File, Loc) \ + fprintf (File, "%d.%d-%d.%d", \ + (Loc).first_line, (Loc).first_column, \ + (Loc).last_line, (Loc).last_column) +#endif +]],[ +#ifndef YYLLOC_DEFAULT +# define YYLLOC_DEFAULT(Current, Rhs, N) ((void) 0) +#endif +])[ + +#ifndef YY_LOCATION_PRINT +# define YY_LOCATION_PRINT(File, Loc) ((void) 0) #endif + /* YYLEX -- calling `yylex' with the right arguments. */ #define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[ ]b4_pure_if( [ #undef yynerrs -#define yynerrs (yystack->yyerrcnt) +#define yynerrs (yystackp->yyerrcnt) #undef yychar -#define yychar (yystack->yyrawchar)], -[YYSTYPE yylval; - -YYLTYPE yylloc; +#define yychar (yystackp->yyrawchar) +#undef yylval +#define yylval (yystackp->yyval) +#undef yylloc +#define yylloc (yystackp->yyloc) +m4_if(b4_prefix[], [yy], [], +[#define b4_prefix[]nerrs yynerrs +#define b4_prefix[]char yychar +#define b4_prefix[]lval yylval +#define b4_prefix[]lloc yylloc])], +[YYSTYPE yylval;]b4_locations_if([[ +YYLTYPE yylloc;]])[ int yynerrs; int yychar;])[ @@ -433,40 +541,33 @@ 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 (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)) -# define YYDPRINTF(Args) \ -do { \ - if (yydebug) \ - YYFPRINTF Args; \ -} while (0) - -]b4_yysymprint_generate([b4_c_ansi_function_def])[ - -# define YYDSYMPRINT(Args) \ -do { \ - if (yydebug) \ - yysymprint Args; \ -} while (0) - -# define YYDSYMPRINTF(Title, Token, Value, Location) \ -do { \ - if (yydebug) \ - { \ - YYFPRINTF (stderr, "%s ", Title); \ - yysymprint (stderr, \ - Token, Value]b4_location_if([, Location])[); \ - YYFPRINTF (stderr, "\n"); \ - } \ -} while (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_locuser_args([Location])[); \ + YYFPRINTF (stderr, "\n"); \ + } \ +} while (YYID (0)) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ @@ -474,15 +575,13 @@ int yydebug; #else /* !YYDEBUG */ - /* Avoid empty `if' bodies. */ # define YYDPRINTF(Args) -# define YYDSYMPRINT(Args) -# define YYDSYMPRINTF(Title, Token, Value, Location) +# define YY_SYMBOL_PRINT(Title, Type, Value, Location) #endif /* !YYDEBUG */ /* YYINITDEPTH -- initial size of the parser's stacks. */ -#ifndef YYINITDEPTH +#ifndef YYINITDEPTH # define YYINITDEPTH ]b4_stack_depth_init[ #endif @@ -493,29 +592,114 @@ int yydebug; SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem) evaluated with infinite-precision integer arithmetic. */ -#if YYMAXDEPTH == 0 -# undef YYMAXDEPTH -#endif - #ifndef YYMAXDEPTH # define YYMAXDEPTH ]b4_stack_depth_max[ #endif /* Minimum number of free items on the stack allowed after an allocation. This is to allow allocation and initialization - to be completed by functions that call expandGLRStack before the + 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 -#if (! defined (YYSTACKEXPANDABLE) \ - && (! defined (__cplusplus) \ - || (]b4_location_if([YYLTYPE_IS_TRIVIAL && ])[YYSTYPE_IS_TRIVIAL))) -#define YYSTACKEXPANDABLE 1 +#ifndef YYSTACKEXPANDABLE +# 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 +# endif +#endif + +#if YYSTACKEXPANDABLE +# define YY_RESERVE_GLRSTACK(Yystack) \ + do { \ + if (Yystack->yyspaceLeft < YYHEADROOM) \ + yyexpandGLRStack (Yystack); \ + } while (YYID (0)) #else -#define YYSTACKEXPANDABLE 0 +# define YY_RESERVE_GLRSTACK(Yystack) \ + do { \ + if (Yystack->yyspaceLeft < YYHEADROOM) \ + yyMemoryExhausted (Yystack); \ + } while (YYID (0)) #endif + +#if YYERROR_VERBOSE + +# ifndef yystpcpy +# if defined __GLIBC__ && defined _STRING_H && defined _GNU_SOURCE +# define yystpcpy stpcpy +# else +/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in + YYDEST. */ +static char * +yystpcpy (char *yydest, const char *yysrc) +{ + char *yyd = yydest; + const char *yys = yysrc; + + while ((*yyd++ = *yys++) != '\0') + continue; + + return yyd - 1; +} +# endif +# endif + +# ifndef yytnamerr +/* Copy to YYRES the contents of YYSTR after stripping away unnecessary + quotes and backslashes, so that it's suitable for yyerror. The + heuristic is that double-quoting is unnecessary unless the string + contains an apostrophe, a comma, or backslash (other than + backslash-backslash). YYSTR is taken from yytname. If YYRES is + null, do not copy; instead, return the length of what the result + would have been. */ +static size_t +yytnamerr (char *yyres, const char *yystr) +{ + if (*yystr == '"') + { + size_t yyn = 0; + char const *yyp = yystr; + + for (;;) + switch (*++yyp) + { + case '\'': + case ',': + goto do_not_strip_quotes; + + case '\\': + if (*++yyp != '\\') + goto do_not_strip_quotes; + /* Fall through. */ + default: + if (yyres) + yyres[yyn] = *yyp; + yyn++; + break; + + case '"': + if (yyres) + yyres[yyn] = '\0'; + return yyn; + } + do_not_strip_quotes: ; + } + + if (! yyres) + return strlen (yystr); + + return yystpcpy (yyres, yystr) - yyres; +} +# endif + +#endif /* !YYERROR_VERBOSE */ + /** State numbers, as in LALR(1) machine */ typedef int yyStateNum; @@ -523,169 +707,211 @@ typedef int yyStateNum; typedef int yyRuleNum; /** Grammar symbol */ -typedef short yySymbol; +typedef short int yySymbol; /** Item references, as in LALR(1) machine */ -typedef short yyItemNum; +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. */ yybool yyisState; + /** Type tag for yysemantics. If true, yysval applies, otherwise + * yyfirstVal applies. */ yybool yyresolved; + /** Number of corresponding LALR(1) machine state. */ yyStateNum yylrState; + /** Preceding state in this stack */ yyGLRState* yypred; + /** Source position of the first token produced by my symbol */ size_t yyposn; union { + /** First in a chain of alternative reductions producing the + * non-terminal corresponding to this state, threaded through + * yynext. */ yySemanticOption* yyfirstVal; + /** Semantic value for this state. */ YYSTYPE yysval; - } yysemantics; - YYLTYPE yyloc; + } yysemantics;]b4_locations_if([[ + /** Source location for this state. */ + YYLTYPE yyloc;]])[ }; struct yyGLRStateSet { yyGLRState** yystates; + /** During nondeterministic operation, yylookaheadNeeds tracks which + * stacks have actually needed the current lookahead. During deterministic + * operation, yylookaheadNeeds[0] is not maintained since it would merely + * duplicate yychar != YYEMPTY. */ + yybool* yylookaheadNeeds; size_t yysize, yycapacity; }; struct yySemanticOption { + /** Type tag: always false. */ yybool yyisState; + /** Rule number for this reduction */ yyRuleNum yyrule; + /** The last RHS state in the list of states to be reduced. */ yyGLRState* yystate; + /** The lookahead for this reduction. */ + int yyrawchar; + YYSTYPE yyval;]b4_locations_if([[ + YYLTYPE yyloc;]])[ + /** Next sibling in chain of options. To facilitate merging, + * options are chained in decreasing order by address. */ yySemanticOption* yynext; }; +/** Type of the items in the GLR stack. The yyisState field + * indicates which item of the union is valid. */ union yyGLRStackItem { yyGLRState yystate; yySemanticOption yyoption; }; struct yyGLRStack { - int yyerrflag; int yyerrState; +]b4_locations_if([[ /* To compute the location of the error token. */ + yyGLRStackItem yyerror_range[3];]])[ ]b4_pure_if( [ int yyerrcnt; int yyrawchar; + YYSTYPE yyval;]b4_locations_if([[ + YYLTYPE yyloc;]])[ ])[ - yySymbol* yytokenp; - jmp_buf yyexception_buffer; + YYJMP_BUF yyexception_buffer; yyGLRStackItem* yyitems; yyGLRStackItem* yynextFree; - int yyspaceLeft; + size_t yyspaceLeft; yyGLRState* yysplitPoint; yyGLRState* yylastDeleted; yyGLRStateSet yytops; }; -static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize); -static void yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[); -static void yyfreeGLRStack (yyGLRStack* yystack); +#if YYSTACKEXPANDABLE +static void yyexpandGLRStack (yyGLRStack* yystackp); +#endif +static void yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) + __attribute__ ((__noreturn__)); static void -yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yyformat, ...) +yyFail (yyGLRStack* yystackp]b4_pure_formals[, const char* yymsg) { - yystack->yyerrflag = 1; - if (yyformat != NULL) - { - char yymsg[256]; - va_list yyap; - va_start (yyap, yyformat); - vsprintf (yymsg, yyformat, yyap); - yyerror (]b4_yyerror_args[yymsg); - } - longjmp (yystack->yyexception_buffer, 1); + if (yymsg != YY_NULL) + yyerror (]b4_yyerror_args[yymsg); + YYLONGJMP (yystackp->yyexception_buffer, 1); +} + +static void yyMemoryExhausted (yyGLRStack* yystackp) + __attribute__ ((__noreturn__)); +static void +yyMemoryExhausted (yyGLRStack* yystackp) +{ + YYLONGJMP (yystackp->yyexception_buffer, 2); } #if YYDEBUG || YYERROR_VERBOSE -/** A printable representation of TOKEN. Valid until next call to - * tokenName. */ +/** A printable representation of TOKEN. */ static inline const char* yytokenName (yySymbol yytoken) { + if (yytoken == YYEMPTY) + return ""; + return yytname[yytoken]; } #endif /** Fill in YYVSP[YYLOW1 .. YYLOW0-1] from the chain of states starting * at YYVSP[YYLOW0].yystate.yypred. Leaves YYVSP[YYLOW1].yystate.yypred - * containing the pointer to the next state in the chain. Assumes - * YYLOW1 < YYLOW0. For convenience, returns YYLOW1. */ -static int -yyfill (yyGLRStackItem* yyvsp, int yylow0, int yylow1) + * 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) { - yyGLRState* s; int i; - s = yyvsp[yylow0].yystate.yypred; + yyGLRState *s = yyvsp[yylow0].yystate.yypred; for (i = yylow0-1; i >= yylow1; i -= 1) { - if (! s->yyresolved) - abort (); + YYASSERT (s->yyresolved); yyvsp[i].yystate.yyresolved = yytrue; - yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval; - yyvsp[i].yystate.yyloc = s->yyloc; + yyvsp[i].yystate.yysemantics.yysval = s->yysemantics.yysval;]b4_locations_if([[ + yyvsp[i].yystate.yyloc = s->yyloc;]])[ s = yyvsp[i].yystate.yypred = s->yypred; } +} + +/* Do nothing if YYNORMAL or if *YYLOW <= YYLOW1. Otherwise, fill in + * YYVSP[YYLOW1 .. *YYLOW-1] as in yyfillin and set *YYLOW = YYLOW1. + * For convenience, always return YYLOW1. */ +static inline int yyfill (yyGLRStackItem *, int *, int, yybool) + __attribute__ ((__unused__)); +static inline int +yyfill (yyGLRStackItem *yyvsp, int *yylow, int yylow1, yybool yynormal) +{ + if (!yynormal && yylow1 < *yylow) + { + yyfillin (yyvsp, *yylow, yylow1); + *yylow = yylow1; + } return yylow1; } /** Perform user action for rule number YYN, with RHS length YYRHSLEN, * and top stack item YYVSP. YYLVALP points to place to put semantic * value ($$), and yylocp points to place for location information - * (@@$). Returns yyok for normal return, yyaccept for YYACCEPT, - * yyerr for YYERROR, yyabort for YYABORT. */ -static YYRESULTTAG + * (@@$). 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* yylocp, yyGLRStack* yystack - ]b4_user_formals[) + yyGLRStack* yystackp, + YYSTYPE* yyvalp]b4_locuser_formals[) { - int yynormal = (yystack->yysplitPoint == NULL); + yybool yynormal __attribute__ ((__unused__)) = + (yystackp->yysplitPoint == YY_NULL); int yylow; - - if (yyrhslen == 0) - { - *yyvalp = yyval_default; - *yylocp = yyloc_default; - } - else - { - *yyvalp = yyvsp[1-yyrhslen].yystate.yysemantics.yysval; - *yylocp = yyvsp[1-yyrhslen].yystate.yyloc; - } -# 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 # define YYABORT return yyabort # undef YYERROR -# define YYERROR return yyerr +# 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) \ - ((yynormal || yylow <= (N)) ? (N) : (yylow = yyfill (yyvsp, yylow, N))) +# define YYFILL(N) yyfill (yyvsp, &yylow, N, yynormal) # undef YYBACKUP -# define YYBACKUP(Token, Value) \ - do { \ - yyerror (]b4_yyerror_args["syntax error: cannot back up"); \ - YYERROR; \ - } while (0) +# define YYBACKUP(Token, Value) \ + return yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")), \ + yyerrok, yyerr -] - yylow = 1; - switch (yyn) - { - b4_actions - } + yylow = 1; + if (yyrhslen == 0) + *yyvalp = yyval_default; + else + *yyvalp = yyvsp[YYFILL (1-yyrhslen)].yystate.yysemantics.yysval;]b4_locations_if([[ + YYLLOC_DEFAULT ((*yylocp), (yyvsp - yyrhslen), yyrhslen); + yystackp->yyerror_range[1].yystate.yyloc = *yylocp; +]])[ + switch (yyn) + { + ]b4_user_actions[ + default: break; + } - return yyok; + return yyok; # undef yyerrok # undef YYABORT # undef YYACCEPT @@ -693,68 +919,94 @@ yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, # undef YYBACKUP # undef yyclearin # undef YYRECOVERING -/* Line __line__ of glr.c. */ -b4_syncline([@oline@], [@ofile@]) } -static YYSTYPE +/*ARGSUSED*/ static void yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1) { - YYSTYPE yyval = *yy0; - /* `Use' the arguments. */ - (void) yy0; - (void) yy1; + YYUSE (yy0); + YYUSE (yy1); switch (yyn) { - b4_mergers + ]b4_mergers[ + default: break; } - return yyval; } -[ - /* Bison grammar-table manipulation. */ + + /* Bison grammar-table manipulation. */ ]b4_yydestruct_generate([b4_c_ansi_function_def])[ -/** Number of symbols composing the right hand side of rule #RULE. */ +/** Number of symbols composing the right hand side of rule #RULE. */ static inline int yyrhsLength (yyRuleNum yyrule) { return yyr2[yyrule]; } -/** Left-hand-side symbol for rule #RULE. */ +static void +yydestroyGLRState (char const *yymsg, yyGLRState *yys]b4_user_formals[) +{ + if (yys->yyresolved) + yydestruct (yymsg, yystos[yys->yylrState], + &yys->yysemantics.yysval]b4_locuser_args([&yys->yyloc])[); + else + { +#if YYDEBUG + if (yydebug) + { + if (yys->yysemantics.yyfirstVal) + YYFPRINTF (stderr, "%s unresolved ", yymsg); + else + YYFPRINTF (stderr, "%s incomplete ", yymsg); + yy_symbol_print (stderr, yystos[yys->yylrState], + YY_NULL]b4_locuser_args([&yys->yyloc])[); + YYFPRINTF (stderr, "\n"); + } +#endif + + if (yys->yysemantics.yyfirstVal) + { + yySemanticOption *yyoption = yys->yysemantics.yyfirstVal; + yyGLRState *yyrh; + int yyn; + for (yyrh = yyoption->yystate, yyn = yyrhsLength (yyoption->yyrule); + yyn > 0; + yyrh = yyrh->yypred, yyn -= 1) + yydestroyGLRState (yymsg, yyrh]b4_user_args[); + } + } +} + +/** 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 @@ -766,15 +1018,16 @@ yydefaultAction (yyStateNum yystate) */ static inline void yygetLRActions (yyStateNum yystate, int yytoken, - int* yyaction, const short** 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]; @@ -809,327 +1062,366 @@ yyisErrorAction (int yyaction) return yyaction == 0; } - /* GLRStates */ + /* GLRStates */ + +/** Return a fresh GLRStackItem. Callers should call + * YY_RESERVE_GLRSTACK afterwards to make sure there is sufficient + * headroom. */ + +static inline yyGLRStackItem* +yynewGLRStackItem (yyGLRStack* yystackp, yybool yyisState) +{ + yyGLRStackItem* yynewItem = yystackp->yynextFree; + yystackp->yyspaceLeft -= 1; + yystackp->yynextFree += 1; + yynewItem->yystate.yyisState = yyisState; + return yynewItem; +} +/** Add a new semantic action that will execute the action for rule + * 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, - yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[) -{ - yySemanticOption* yynewItem; - yynewItem = &yystack->yynextFree->yyoption; - yystack->yyspaceLeft -= 1; - yystack->yynextFree += 1; - yynewItem->yyisState = yyfalse; - yynewItem->yystate = rhs; - yynewItem->yyrule = yyrule; - yynewItem->yynext = yystate->yysemantics.yyfirstVal; - yystate->yysemantics.yyfirstVal = yynewItem; - if (yystack->yyspaceLeft < YYHEADROOM) - yyexpandGLRStack (yystack]b4_pure_args[); +yyaddDeferredAction (yyGLRStack* yystackp, size_t yyk, yyGLRState* yystate, + yyGLRState* rhs, yyRuleNum yyrule) +{ + yySemanticOption* yynewOption = + &yynewGLRStackItem (yystackp, yyfalse)->yyoption; + yynewOption->yystate = rhs; + yynewOption->yyrule = yyrule; + if (yystackp->yytops.yylookaheadNeeds[yyk]) + { + yynewOption->yyrawchar = yychar; + yynewOption->yyval = yylval;]b4_locations_if([ + yynewOption->yyloc = yylloc;])[ + } + else + yynewOption->yyrawchar = YYEMPTY; + yynewOption->yynext = yystate->yysemantics.yyfirstVal; + yystate->yysemantics.yyfirstVal = yynewOption; + + YY_RESERVE_GLRSTACK (yystackp); } - /* GLRStacks */ + /* GLRStacks */ -/** Initialize SET to a singleton set containing an empty stack. */ -static void +/** Initialize SET to a singleton set containing an empty stack. */ +static yybool yyinitStateSet (yyGLRStateSet* yyset) { yyset->yysize = 1; yyset->yycapacity = 16; - yyset->yystates = (yyGLRState**) malloc (16 * sizeof (yyset->yystates[0])); - yyset->yystates[0] = NULL; + yyset->yystates = (yyGLRState**) YYMALLOC (16 * sizeof yyset->yystates[0]); + if (! yyset->yystates) + return yyfalse; + yyset->yystates[0] = YY_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) { - free (yyset->yystates); + YYFREE (yyset->yystates); + YYFREE (yyset->yylookaheadNeeds); } /** Initialize STACK to a single empty stack, with total maximum - * capacity for all stacks of SIZE. */ -static void -yyinitGLRStack (yyGLRStack* yystack, size_t yysize) + * capacity for all stacks of SIZE. */ +static yybool +yyinitGLRStack (yyGLRStack* yystackp, size_t yysize) { - yystack->yyerrflag = 0; - yystack->yyerrState = 0; + yystackp->yyerrState = 0; yynerrs = 0; - yystack->yyspaceLeft = yysize; - yystack->yynextFree = yystack->yyitems = - (yyGLRStackItem*) malloc (yysize * sizeof (yystack->yynextFree[0])); - yystack->yysplitPoint = NULL; - yystack->yylastDeleted = NULL; - yyinitStateSet (&yystack->yytops); + yystackp->yyspaceLeft = yysize; + yystackp->yyitems = + (yyGLRStackItem*) YYMALLOC (yysize * sizeof yystackp->yynextFree[0]); + if (!yystackp->yyitems) + return yyfalse; + yystackp->yynextFree = yystackp->yyitems; + yystackp->yysplitPoint = YY_NULL; + yystackp->yylastDeleted = YY_NULL; + return yyinitStateSet (&yystackp->yytops); } -#define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \ + +#if YYSTACKEXPANDABLE +# define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \ &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE /** If STACK is expandable, extend it. WARNING: Pointers into the stack from outside should be considered invalid after this call. We always expand when there are 1 or fewer items left AFTER an allocation, so that we can avoid having external pointers exist - across an allocation. */ + across an allocation. */ static void -yyexpandGLRStack (yyGLRStack* yystack]b4_pure_formals[) +yyexpandGLRStack (yyGLRStack* yystackp) { -#if YYSTACKEXPANDABLE - yyGLRStack yynewStack; + yyGLRStackItem* yynewItems; yyGLRStackItem* yyp0, *yyp1; - size_t yysize, yynewSize; + size_t yynewSize; size_t yyn; - yysize = yystack->yynextFree - yystack->yyitems; - if (YYMAXDEPTH <= yysize) - yyFail (yystack][]b4_pure_args[, "parser stack overflow"); + size_t yysize = yystackp->yynextFree - yystackp->yyitems; + if (YYMAXDEPTH - YYHEADROOM < yysize) + yyMemoryExhausted (yystackp); yynewSize = 2*yysize; if (YYMAXDEPTH < yynewSize) yynewSize = YYMAXDEPTH; - yyinitGLRStack (&yynewStack, yynewSize); - for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize; + yynewItems = (yyGLRStackItem*) YYMALLOC (yynewSize * sizeof yynewItems[0]); + if (! yynewItems) + yyMemoryExhausted (yystackp); + for (yyp0 = yystackp->yyitems, yyp1 = yynewItems, yyn = yysize; 0 < yyn; yyn -= 1, yyp0 += 1, yyp1 += 1) { *yyp1 = *yyp0; if (*(yybool *) yyp0) - { - yyGLRState* yys0 = &yyp0->yystate; - yyGLRState* yys1 = &yyp1->yystate; - if (yys0->yypred != NULL) - yys1->yypred = - YYRELOC (yyp0, yyp1, yys0->yypred, yystate); - if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL) - yys1->yysemantics.yyfirstVal = - YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption); - } + { + yyGLRState* yys0 = &yyp0->yystate; + yyGLRState* yys1 = &yyp1->yystate; + if (yys0->yypred != YY_NULL) + yys1->yypred = + YYRELOC (yyp0, yyp1, yys0->yypred, yystate); + if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != YY_NULL) + yys1->yysemantics.yyfirstVal = + YYRELOC (yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption); + } else - { - yySemanticOption* yyv0 = &yyp0->yyoption; - yySemanticOption* yyv1 = &yyp1->yyoption; - if (yyv0->yystate != NULL) - yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate); - if (yyv0->yynext != NULL) - yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); - } + { + yySemanticOption* yyv0 = &yyp0->yyoption; + yySemanticOption* yyv1 = &yyp1->yyoption; + if (yyv0->yystate != YY_NULL) + yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate); + if (yyv0->yynext != YY_NULL) + yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); + } } - if (yystack->yysplitPoint != NULL) - yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems, - 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, yynewStack.yyitems, - yystack->yytops.yystates[yyn], yystate); - free (yystack->yyitems); - yystack->yyitems = yynewStack.yyitems; - yystack->yynextFree = yynewStack.yynextFree + yysize; - yystack->yyspaceLeft = yynewStack.yyspaceLeft - yysize; - -#else - - yyFail (yystack][]b4_pure_args[, "parser stack overflow"); -#endif + if (yystackp->yysplitPoint != YY_NULL) + yystackp->yysplitPoint = YYRELOC (yystackp->yyitems, yynewItems, + yystackp->yysplitPoint, yystate); + + for (yyn = 0; yyn < yystackp->yytops.yysize; yyn += 1) + if (yystackp->yytops.yystates[yyn] != YY_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) { - free (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 != YY_NULL && yystackp->yysplitPoint > yys) + yystackp->yysplitPoint = yys; } -/** Invalidate stack #K in STACK. */ +/** Invalidate stack #K in STACK. */ static inline void -yymarkStackDeleted (yyGLRStack* yystack, int 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] != YY_NULL) + yystackp->yylastDeleted = yystackp->yytops.yystates[yyk]; + yystackp->yytops.yystates[yyk] = YY_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 == YY_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 = YY_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 (yyi == yyj) - { - YYDPRINTF ((stderr, "Removing dead stacks.\n")); - } - yystack->yytops.yysize -= 1; - } + if (yystackp->yytops.yystates[yyi] == YY_NULL) + { + if (yyi == yyj) + { + YYDPRINTF ((stderr, "Removing dead stacks.\n")); + } + yystackp->yytops.yysize -= 1; + } else - { - yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi]; - if (yyj != yyi) - { - YYDPRINTF ((stderr, "Rename stack %d -> %d.\n", yyi, yyj)); - } - yyj += 1; - } + { + yystackp->yytops.yystates[yyj] = yystackp->yytops.yystates[yyi]; + /* In the current implementation, it's unnecessary to copy + yystackp->yytops.yylookaheadNeeds[yyi] since, after + yyremoveDeletes returns, the parser immediately either enters + deterministic operation or shifts a token. However, it doesn't + hurt, and the code might evolve to need it. */ + yystackp->yytops.yylookaheadNeeds[yyj] = + yystackp->yytops.yylookaheadNeeds[yyi]; + if (yyj != yyi) + { + YYDPRINTF ((stderr, "Rename stack %lu -> %lu.\n", + (unsigned long int) yyi, (unsigned long int) yyj)); + } + yyj += 1; + } yyi += 1; } } /** 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, int yyk, yyStateNum yylrState, size_t yyposn, - YYSTYPE yysval, YYLTYPE* yylocp]b4_user_formals[) -{ - yyGLRStackItem* yynewItem; - - yynewItem = yystack->yynextFree; - yystack->yynextFree += 1; - yystack->yyspaceLeft -= 1; - yynewItem->yystate.yyisState = yytrue; - yynewItem->yystate.yylrState = yylrState; - yynewItem->yystate.yyposn = yyposn; - yynewItem->yystate.yyresolved = yytrue; - yynewItem->yystate.yypred = yystack->yytops.yystates[yyk]; - yystack->yytops.yystates[yyk] = &yynewItem->yystate; - yynewItem->yystate.yysemantics.yysval = yysval; - yynewItem->yystate.yyloc = *yylocp; - if (yystack->yyspaceLeft < YYHEADROOM) - yyexpandGLRStack (yystack]b4_pure_args[); +yyglrShift (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, + size_t yyposn, + YYSTYPE* yyvalp]b4_locations_if([, YYLTYPE* yylocp])[) +{ + yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; + + yynewState->yylrState = yylrState; + yynewState->yyposn = yyposn; + yynewState->yyresolved = yytrue; + yynewState->yypred = yystackp->yytops.yystates[yyk]; + yynewState->yysemantics.yysval = *yyvalp;]b4_locations_if([ + yynewState->yyloc = *yylocp;])[ + yystackp->yytops.yystates[yyk] = yynewState; + + YY_RESERVE_GLRSTACK (yystackp); } /** Shift stack #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, int yyk, yyStateNum yylrState, - size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule]b4_pure_formals[) -{ - yyGLRStackItem* yynewItem; - - yynewItem = yystack->yynextFree; - yynewItem->yystate.yyisState = yytrue; - yynewItem->yystate.yylrState = yylrState; - yynewItem->yystate.yyposn = yyposn; - yynewItem->yystate.yyresolved = yyfalse; - yynewItem->yystate.yypred = yystack->yytops.yystates[yyk]; - yynewItem->yystate.yysemantics.yyfirstVal = NULL; - yystack->yytops.yystates[yyk] = &yynewItem->yystate; - yystack->yynextFree += 1; - yystack->yyspaceLeft -= 1; - yyaddDeferredAction (yystack, &yynewItem->yystate, rhs, yyrule]b4_pure_args[); +yyglrShiftDefer (yyGLRStack* yystackp, size_t yyk, yyStateNum yylrState, + size_t yyposn, yyGLRState* rhs, yyRuleNum yyrule) +{ + yyGLRState* yynewState = &yynewGLRStackItem (yystackp, yytrue)->yystate; + + yynewState->yylrState = yylrState; + yynewState->yyposn = yyposn; + yynewState->yyresolved = yyfalse; + yynewState->yypred = yystackp->yytops.yystates[yyk]; + yynewState->yysemantics.yyfirstVal = YY_NULL; + yystackp->yytops.yystates[yyk] = yynewState; + + /* 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, int yyk, yyRuleNum yyrule, - YYSTYPE* yyvalp, YYLTYPE* yylocp]b4_user_formals[) +yydoAction (yyGLRStack* yystackp, size_t yyk, yyRuleNum yyrule, + YYSTYPE* yyvalp]b4_locuser_formals[) { int yynrhs = yyrhsLength (yyrule); - if (yystack->yysplitPoint == NULL) + if (yystackp->yysplitPoint == YY_NULL) { - /* Standard special case: single stack. */ - yyGLRStackItem* rhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk]; - if (yyk != 0) - abort (); - yystack->yynextFree -= yynrhs; - yystack->yyspaceLeft += yynrhs; - yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate; - if (yynrhs == 0) - { - *yyvalp = yyval_default; - *yylocp = yyloc_default; - } - else - { - *yyvalp = rhs[1-yynrhs].yystate.yysemantics.yysval; - *yylocp = rhs[1-yynrhs].yystate.yyloc; - } - return yyuserAction (yyrule, yynrhs, rhs, - yyvalp, yylocp, yystack]b4_user_args[); + /* Standard special case: single stack. */ + yyGLRStackItem* rhs = (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, yystackp, + yyvalp]b4_locuser_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. */ int yyi; yyGLRState* yys; - yyGLRStackItem yyrhsVals[YYMAXRHS+1]; - yys = yyrhsVals[YYMAXRHS].yystate.yypred = yystack->yytops.yystates[yyk]; - for (yyi = 0; yyi < yynrhs; yyi += 1) - { - yys = yys->yypred; - if (yys == NULL) - abort (); - } - yyupdateSplit (yystack, yys); - yystack->yytops.yystates[yyk] = yys; + yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; + yys = yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred + = yystackp->yytops.yystates[yyk];]b4_locations_if([[ if (yynrhs == 0) - { - *yyvalp = yyval_default; - *yylocp = yyloc_default; - } - else - { - *yyvalp = yyrhsVals[1].yystate.yysemantics.yysval; - *yylocp = yyrhsVals[1].yystate.yyloc; - } - return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS - 1, - yyvalp, yylocp, yystack]b4_user_args[); + /* Set default location. */ + yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yys->yyloc;]])[ + for (yyi = 0; yyi < yynrhs; yyi += 1) + { + yys = yys->yypred; + YYASSERT (yys); + } + yyupdateSplit (yystackp, yys); + yystackp->yytops.yystates[yyk] = yys; + return yyuserAction (yyrule, yynrhs, yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, + yystackp, yyvalp]b4_locuser_args[); } } #if !YYDEBUG -# define YY_REDUCE_PRINT(K, Rule) +# define YY_REDUCE_PRINT(Args) #else -# define YY_REDUCE_PRINT(K, Rule) \ -do { \ - if (yydebug) \ - yy_reduce_print (K, Rule); \ -} while (0) +# define YY_REDUCE_PRINT(Args) \ +do { \ + if (yydebug) \ + 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]b4_locuser_formals[) { + int yynrhs = yyrhsLength (yyrule); + yybool yynormal __attribute__ ((__unused__)) = + (yystackp->yysplitPoint == YY_NULL); + yyGLRStackItem* yyvsp = (yyGLRStackItem*) yystackp->yytops.yystates[yyk]; + int yylow = 1; int yyi; - unsigned int yylno = yyrline[yyrule]; - YYFPRINTF (stderr, "Reducing stack %d by rule %d (line %u), ", - yyk, yyrule - 1, yylno); - /* 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])); + YYUSE (yyvalp);]b4_locations_if([ + YYUSE (yylocp);])[ +]b4_parse_param_use[]dnl +[ YYFPRINTF (stderr, "Reducing stack %lu by rule %d (line %lu):\n", + (unsigned long int) yyk, yyrule - 1, + (unsigned long int) yyrline[yyrule]); + /* 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 @@ -1141,97 +1433,118 @@ 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_pure_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 == YY_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, - yylhsNonterm (yyrule)), - yyposn, yysval, &yyloc]b4_user_args[); + YYSTYPE yysval;]b4_locations_if([ + YYLTYPE yyloc;])[ + + YY_REDUCE_PRINT ((yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[)); + YYCHK (yydoAction (yystackp, yyk, yyrule, &yysval]b4_locuser_args([&yyloc])[)); + YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyrule], &yysval, &yyloc); + yyglrShift (yystackp, yyk, + yyLRgotoState (yystackp->yytops.yystates[yyk]->yylrState, + yylhsNonterm (yyrule)), + yyposn, &yysval]b4_locations_if([, &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); - 0 < yyn; yyn -= 1) - { - yys = yys->yypred; - if (yys == NULL) - abort (); - } - yyupdateSplit (yystack, yys); + for (yys = yystackp->yytops.yystates[yyk], yyn = yyrhsLength (yyrule); + 0 < yyn; yyn -= 1) + { + yys = yys->yypred; + YYASSERT (yys); + } + yyupdateSplit (yystackp, yys); yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule)); YYDPRINTF ((stderr, - "Reduced stack %d by rule #%d; action deferred. " - "Now in state %d.\n", - yyk, yyrule-1, yynewLRState)); - for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) - if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL) - { - yyGLRState* yyp, *yysplit = yystack->yysplitPoint; - yyp = yystack->yytops.yystates[yyi]; - while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn) - { - if (yyp->yylrState == yynewLRState && yyp->yypred == yys) - { - yyaddDeferredAction (yystack, yyp, yys0, yyrule]b4_pure_args[); - yymarkStackDeleted (yystack, yyk); - YYDPRINTF ((stderr, "Merging stack %d into stack %d.\n", - yyk, yyi)); - return yyok; - } - yyp = yyp->yypred; - } - } - yystack->yytops.yystates[yyk] = yys; - yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule]b4_pure_args[); + "Reduced stack %lu by rule #%d; action deferred. Now in state %d.\n", + (unsigned long int) yyk, yyrule - 1, yynewLRState)); + for (yyi = 0; yyi < yystackp->yytops.yysize; yyi += 1) + if (yyi != yyk && yystackp->yytops.yystates[yyi] != YY_NULL) + { + yyGLRState *yysplit = yystackp->yysplitPoint; + yyGLRState *yyp = yystackp->yytops.yystates[yyi]; + while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn) + { + if (yyp->yylrState == yynewLRState && yyp->yypred == yys) + { + yyaddDeferredAction (yystackp, yyk, yyp, yys0, yyrule); + yymarkStackDeleted (yystackp, yyk); + YYDPRINTF ((stderr, "Merging stack %lu into stack %lu.\n", + (unsigned long int) yyk, + (unsigned long int) yyi)); + return yyok; + } + yyp = yyp->yypred; + } + } + yystackp->yytops.yystates[yyk] = yys; + yyglrShiftDefer (yystackp, yyk, yynewLRState, yyposn, yys0, yyrule); } return yyok; } -static int -yysplitStack (yyGLRStack* yystack, int yyk) +static size_t +yysplitStack (yyGLRStack* yystackp, size_t yyk) { - if (yystack->yysplitPoint == NULL) + if (yystackp->yysplitPoint == YY_NULL) { - if (yyk != 0) - abort (); - yystack->yysplitPoint = yystack->yytops.yystates[yyk]; + YYASSERT (yyk == 0); + yystackp->yysplitPoint = yystackp->yytops.yystates[yyk]; } - if (yystack->yytops.yysize >= yystack->yytops.yycapacity) + if (yystackp->yytops.yysize >= yystackp->yytops.yycapacity) { - yystack->yytops.yycapacity *= 2; - yystack->yytops.yystates = - (yyGLRState**) realloc (yystack->yytops.yystates, - yystack->yytops.yycapacity - * sizeof (yyGLRState*)); + yyGLRState** yynewStates; + yybool* yynewLookaheadNeeds; + + yynewStates = YY_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 == YY_NULL) + yyMemoryExhausted (yystackp); + yystackp->yytops.yystates = yynewStates; + + yynewLookaheadNeeds = + (yybool*) YYREALLOC (yystackp->yytops.yylookaheadNeeds, + (yystackp->yytops.yycapacity + * sizeof yynewLookaheadNeeds[0])); + if (yynewLookaheadNeeds == YY_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) { @@ -1240,20 +1553,19 @@ yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1) yyGLRState *yys0, *yys1; int yyn; for (yys0 = yyy0->yystate, yys1 = yyy1->yystate, - yyn = yyrhsLength (yyy0->yyrule); - yyn > 0; - yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) - if (yys0->yyposn != yys1->yyposn) - return yyfalse; + yyn = yyrhsLength (yyy0->yyrule); + yyn > 0; + yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) + if (yys0->yyposn != yys1->yyposn) + return yyfalse; return yytrue; } else return yyfalse; } -/** Assuming identicalOptions (Y0,Y1), (destructively) merge the - * alternative semantic values for the RHS-symbols of Y1 into the - * corresponding semantic value sets of the symbols of Y0. */ +/** Assuming identicalOptions (Y0,Y1), destructively merge the + * alternative semantic values for the RHS-symbols of Y1 and Y0. */ static void yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) { @@ -1263,21 +1575,49 @@ yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) yyn = yyrhsLength (yyy0->yyrule); yyn > 0; yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) - if (yys0 == yys1) - break; - else if (! yys0->yyresolved && ! yys1->yyresolved) - { - yySemanticOption* yyz; - for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL; - yyz = yyz->yynext) - continue; - yyz->yynext = yys1->yysemantics.yyfirstVal; - } + { + if (yys0 == yys1) + break; + else if (yys0->yyresolved) + { + yys1->yyresolved = yytrue; + yys1->yysemantics.yysval = yys0->yysemantics.yysval; + } + else if (yys1->yyresolved) + { + yys0->yyresolved = yytrue; + yys0->yysemantics.yysval = yys1->yysemantics.yysval; + } + else + { + yySemanticOption** yyz0p = &yys0->yysemantics.yyfirstVal; + yySemanticOption* yyz1 = yys1->yysemantics.yyfirstVal; + while (YYID (yytrue)) + { + if (yyz1 == *yyz0p || yyz1 == YY_NULL) + break; + else if (*yyz0p == YY_NULL) + { + *yyz0p = yyz1; + break; + } + else if (*yyz0p < yyz1) + { + yySemanticOption* yyz = *yyz0p; + *yyz0p = yyz1; + yyz1 = yyz1->yynext; + (*yyz0p)->yynext = yyz; + } + yyz0p = &(*yyz0p)->yynext; + } + yys1->yysemantics.yyfirstVal = yys0->yysemantics.yyfirstVal; + } + } } /** 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) { @@ -1287,9 +1627,9 @@ yypreference (yySemanticOption* y0, yySemanticOption* y1) if (p0 == p1) { if (yymerger[r0] == 0 || yymerger[r0] != yymerger[r1]) - return 0; + return 0; else - return 1; + return 1; } if (p0 == 0 || p1 == 0) return 0; @@ -1300,46 +1640,68 @@ 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) { - if (yys->yypred == NULL) - abort (); - yyflag = yyresolveStates (yys->yypred, yyn-1, yystack]b4_user_args[); - if (yyflag != yyok) - return yyflag; + YYASSERT (yys->yypred); + 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[) -{ - yyGLRStackItem yyrhsVals[YYMAXRHS+1]; - int yynrhs; +yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystackp, + YYSTYPE* yyvalp]b4_locuser_formals[) +{ + yyGLRStackItem yyrhsVals[YYMAXRHS + YYMAXLEFT + 1]; + int yynrhs = yyrhsLength (yyopt->yyrule); + YYRESULTTAG yyflag = + yyresolveStates (yyopt->yystate, yynrhs, yystackp]b4_user_args[); + if (yyflag != yyok) + { + yyGLRState *yys; + for (yys = yyopt->yystate; yynrhs > 0; yys = yys->yypred, yynrhs -= 1) + yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); + return yyflag; + } - yynrhs = yyrhsLength (yyopt->yyrule); - YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack]b4_user_args[)); - yyrhsVals[YYMAXRHS].yystate.yypred = yyopt->yystate; - return yyuserAction (yyopt->yyrule, yynrhs, yyrhsVals + YYMAXRHS - 1, - yyvalp, yylocp, yystack]b4_user_args[); + yyrhsVals[YYMAXRHS + YYMAXLEFT].yystate.yypred = yyopt->yystate;]b4_locations_if([[ + if (yynrhs == 0) + /* Set default location. */ + yyrhsVals[YYMAXRHS + YYMAXLEFT - 1].yystate.yyloc = yyopt->yystate->yyloc;]])[ + { + int yychar_current = yychar; + YYSTYPE yylval_current = yylval;]b4_locations_if([ + YYLTYPE yylloc_current = yylloc;])[ + yychar = yyopt->yyrawchar; + yylval = yyopt->yyval;]b4_locations_if([ + yylloc = yyopt->yyloc;])[ + yyflag = yyuserAction (yyopt->yyrule, yynrhs, + yyrhsVals + YYMAXRHS + YYMAXLEFT - 1, + yystackp, yyvalp]b4_locuser_args[); + yychar = yychar_current; + yylval = yylval_current;]b4_locations_if([ + yylloc = yylloc_current;])[ + } + return yyflag; } #if YYDEBUG @@ -1349,12 +1711,12 @@ yyreportTree (yySemanticOption* yyx, int yyindent) int yynrhs = yyrhsLength (yyx->yyrule); int yyi; yyGLRState* yys; - yyGLRState* yystates[YYMAXRHS]; + yyGLRState* yystates[1 + YYMAXRHS]; yyGLRState yyleftmost_state; for (yyi = yynrhs, yys = yyx->yystate; 0 < yyi; yyi -= 1, yys = yys->yypred) yystates[yyi] = yys; - if (yys == NULL) + if (yys == YY_NULL) { yyleftmost_state.yyposn = 0; yystates[0] = &yyleftmost_state; @@ -1364,37 +1726,38 @@ yyreportTree (yySemanticOption* yyx, int yyindent) if (yyx->yystate->yyposn < yys->yyposn + 1) YYFPRINTF (stderr, "%*s%s -> \n", - yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule); + yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), + yyx->yyrule - 1); else - YYFPRINTF (stderr, "%*s%s -> \n", - yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), - yyx->yyrule, yys->yyposn+1, yyx->yystate->yyposn); + YYFPRINTF (stderr, "%*s%s -> \n", + yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), + yyx->yyrule - 1, (unsigned long int) (yys->yyposn + 1), + (unsigned long int) yyx->yystate->yyposn); for (yyi = 1; yyi <= yynrhs; yyi += 1) { if (yystates[yyi]->yyresolved) - { - if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn) - YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", - yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); - else - YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", - yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), - yystates[yyi-1]->yyposn+1, yystates[yyi]->yyposn); - } + { + if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn) + YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", + yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); + else + YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", + yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), + (unsigned long int) (yystates[yyi - 1]->yyposn + 1), + (unsigned long int) yystates[yyi]->yyposn); + } else - yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2); + yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2); } } #endif -static void -yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, - yyGLRStack* yystack]b4_pure_formals[) +/*ARGSUSED*/ static YYRESULTTAG +yyreportAmbiguity (yySemanticOption* yyx0, + yySemanticOption* yyx1]b4_pure_formals[) { - /* `Unused' warnings. */ - (void) yyx0; - (void) yyx1; + YYUSE (yyx0); + YYUSE (yyx1); #if YYDEBUG YYFPRINTF (stderr, "Ambiguity detected.\n"); @@ -1404,377 +1767,532 @@ yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, yyreportTree (yyx1, 2); YYFPRINTF (stderr, "\n"); #endif - yyFail (yystack][]b4_pure_args[, "ambiguity detected"); -} + 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) + { + yyGLRStackItem yyrhsloc[1 + YYMAXRHS]; + int yynrhs; + yySemanticOption *yyoption = yys1->yysemantics.yyfirstVal; + YYASSERT (yyoption != YY_NULL); + yynrhs = yyrhsLength (yyoption->yyrule); + if (yynrhs > 0) + { + yyGLRState *yys; + int yyn; + yyresolveLocations (yyoption->yystate, yynrhs, + yystackp]b4_user_args[); + for (yys = yyoption->yystate, yyn = yynrhs; + yyn > 0; + yys = yys->yypred, yyn -= 1) + yyrhsloc[yyn].yystate.yyloc = yys->yyloc; + } + else + { + /* Both yyresolveAction and yyresolveLocations traverse the GSS + in reverse rightmost order. It is only necessary to invoke + yyresolveLocations on a subforest for which yyresolveAction + would have been invoked next had an ambiguity not been + detected. Thus the location of the previous state (but not + necessarily the previous state itself) is guaranteed to be + resolved already. */ + yyGLRState *yyprevious = yyoption->yystate; + yyrhsloc[0].yystate.yyloc = yyprevious->yyloc; + } + { + int yychar_current = yychar; + YYSTYPE yylval_current = yylval; + YYLTYPE yylloc_current = yylloc; + yychar = yyoption->yyrawchar; + yylval = yyoption->yyval; + yylloc = yyoption->yyloc; + YYLLOC_DEFAULT ((yys1->yyloc), yyrhsloc, yynrhs); + yychar = yychar_current; + yylval = yylval_current; + yylloc = yylloc_current; + } + } + } +}]])[ + +/** Resolve the ambiguity represented in state S, perform the indicated + * actions, and 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* yybest; - yySemanticOption* yyp; - int yymerge; + yySemanticOption* yyoptionList = yys->yysemantics.yyfirstVal; + yySemanticOption* yybest = yyoptionList; + yySemanticOption** yypp; + yybool yymerge = yyfalse; + YYSTYPE yysval; + YYRESULTTAG yyflag;]b4_locations_if([ + YYLTYPE *yylocp = &yys->yyloc;])[ - yybest = yyoptionList; - yymerge = 0; - for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext) + for (yypp = &yyoptionList->yynext; *yypp != YY_NULL; ) { + yySemanticOption* yyp = *yypp; + if (yyidenticalOptions (yybest, yyp)) - yymergeOptionSets (yybest, yyp); + { + yymergeOptionSets (yybest, yyp); + *yypp = yyp->yynext; + } else - switch (yypreference (yybest, yyp)) - { - case 0: - yyreportAmbiguity (yybest, yyp, yystack]b4_pure_args[); - break; - case 1: - yymerge = 1; - break; - case 2: - break; - case 3: - yybest = yyp; - yymerge = 0; - break; - } + { + switch (yypreference (yybest, yyp)) + { + case 0:]b4_locations_if([[ + yyresolveLocations (yys, 1, yystackp]b4_user_args[);]])[ + return yyreportAmbiguity (yybest, yyp]b4_pure_args[); + break; + case 1: + yymerge = yytrue; + break; + case 2: + break; + case 3: + yybest = yyp; + yymerge = yyfalse; + break; + default: + /* This cannot happen so it is not worth a YYASSERT (yyfalse), + but some compilers complain if the default case is + omitted. */ + break; + } + yypp = &yyp->yynext; + } } if (yymerge) { + yySemanticOption* yyp; int yyprec = yydprec[yybest->yyrule]; - YYCHK (yyresolveAction (yybest, 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[)); - *yyvalp = yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1); - } - } - return yyok; + yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args[); + if (yyflag == yyok) + for (yyp = yybest->yynext; yyp != YY_NULL; yyp = yyp->yynext) + { + if (yyprec == yydprec[yyp->yyrule]) + { + YYSTYPE yysval_other;]b4_locations_if([ + YYLTYPE yydummy;])[ + yyflag = yyresolveAction (yyp, yystackp, &yysval_other]b4_locuser_args([&yydummy])[); + if (yyflag != yyok) + { + yydestruct ("Cleanup: discarding incompletely merged value for", + yystos[yys->yylrState], + &yysval]b4_locuser_args[); + break; + } + yyuserMerge (yymerger[yyp->yyrule], &yysval, &yysval_other); + } + } + } + else + yyflag = yyresolveAction (yybest, yystackp, &yysval]b4_locuser_args([yylocp])[); + + if (yyflag == yyok) + { + yys->yyresolved = yytrue; + yys->yysemantics.yysval = yysval; } else - return yyresolveAction (yybest, yystack, yyvalp, yylocp]b4_user_args[); + yys->yysemantics.yyfirstVal = YY_NULL; + return yyflag; } static YYRESULTTAG -yyresolveStack (yyGLRStack* yystack]b4_user_formals[) +yyresolveStack (yyGLRStack* yystackp]b4_user_formals[) { - if (yystack->yysplitPoint != NULL) + if (yystackp->yysplitPoint != YY_NULL) { yyGLRState* yys; int yyn; - for (yyn = 0, yys = yystack->yytops.yystates[0]; - yys != yystack->yysplitPoint; - yys = yys->yypred, yyn += 1) - continue; - YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack - ]b4_user_args[)); + for (yyn = 0, yys = yystackp->yytops.yystates[0]; + yys != yystackp->yysplitPoint; + yys = yys->yypred, yyn += 1) + continue; + YYCHK (yyresolveStates (yystackp->yytops.yystates[0], yyn, yystackp + ]b4_user_args[)); } return yyok; } static void -yycompressStack (yyGLRStack* yystack) +yycompressStack (yyGLRStack* yystackp) { yyGLRState* yyp, *yyq, *yyr; - if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL) + if (yystackp->yytops.yysize != 1 || yystackp->yysplitPoint == YY_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 = YY_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 = YY_NULL; + yystackp->yylastDeleted = YY_NULL; - while (yyr != NULL) + while (yyr != YY_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, int yyk, - size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp - ]b4_user_formals[) +yyprocessOneStack (yyGLRStack* yystackp, size_t yyk, + size_t yyposn]b4_pure_formals[) { int yyaction; - const short* yyconflicts; + const short int* yyconflicts; yyRuleNum yyrule; - yySymbol* const yytokenp = yystack->yytokenp; - while (yystack->yytops.yystates[yyk] != NULL) + while (yystackp->yytops.yystates[yyk] != YY_NULL) { - yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState; - YYDPRINTF ((stderr, "Stack %d Entering state %d\n", yyk, yystate)); + yyStateNum yystate = yystackp->yytops.yystates[yyk]->yylrState; + YYDPRINTF ((stderr, "Stack %lu Entering state %d\n", + (unsigned long int) yyk, yystate)); + + YYASSERT (yystate != YYFINAL); - if (yystate == YYFINAL) - abort (); if (yyisDefaultedState (yystate)) - { - yyrule = yydefaultAction (yystate); - if (yyrule == 0) - { - YYDPRINTF ((stderr, "Stack %d dies.\n", yyk)); - yymarkStackDeleted (yystack, yyk); - return yyok; - } - YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse]b4_lpure_args[)); - } + { + yyrule = yydefaultAction (yystate); + if (yyrule == 0) + { + YYDPRINTF ((stderr, "Stack %lu dies.\n", + (unsigned long int) yyk)); + yymarkStackDeleted (yystackp, yyk); + return yyok; + } + YYCHK (yyglrReduce (yystackp, yyk, yyrule, yyfalse]b4_user_args[)); + } else - { - if (*yytokenp == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - *yytokenp = YYTRANSLATE (yychar); - YYDSYMPRINTF ("Next token is", *yytokenp, yylvalp, yyllocp); - } - yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts); - - while (*yyconflicts != 0) - { - int yynewStack = yysplitStack (yystack, yyk); - YYDPRINTF ((stderr, "Splitting off stack %d from %d.\n", - yynewStack, yyk)); - YYCHK (yyglrReduce (yystack, yynewStack, - *yyconflicts, yyfalse]b4_lpure_args[)); - YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn, - yylvalp, yyllocp]b4_user_args[)); - yyconflicts += 1; - } - - if (yyisShiftAction (yyaction)) - { - YYDPRINTF ((stderr, "Shifting token %s on stack %d, ", - yytokenName (*yytokenp), yyk)); - yyglrShift (yystack, yyk, yyaction, yyposn+1, - *yylvalp, yyllocp]b4_user_args[); - YYDPRINTF ((stderr, "which is now in state #%d\n", - yystack->yytops.yystates[yyk]->yylrState)); - break; - } - else if (yyisErrorAction (yyaction)) - { - YYDPRINTF ((stderr, "Stack %d dies.\n", yyk)); - yymarkStackDeleted (yystack, yyk); - break; - } - else - YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse]b4_lpure_args[)); - } + { + yySymbol yytoken; + yystackp->yytops.yylookaheadNeeds[yyk] = yytrue; + if (yychar == YYEMPTY) + { + YYDPRINTF ((stderr, "Reading a token: ")); + yychar = YYLEX; + } + + if (yychar <= YYEOF) + { + yychar = yytoken = YYEOF; + YYDPRINTF ((stderr, "Now at end of input.\n")); + } + else + { + yytoken = YYTRANSLATE (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); + } + + yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts); + + while (*yyconflicts != 0) + { + size_t yynewStack = yysplitStack (yystackp, yyk); + YYDPRINTF ((stderr, "Splitting off stack %lu from %lu.\n", + (unsigned long int) yynewStack, + (unsigned long int) yyk)); + YYCHK (yyglrReduce (yystackp, yynewStack, + *yyconflicts, yyfalse]b4_user_args[)); + YYCHK (yyprocessOneStack (yystackp, yynewStack, + yyposn]b4_pure_args[)); + yyconflicts += 1; + } + + if (yyisShiftAction (yyaction)) + break; + else if (yyisErrorAction (yyaction)) + { + YYDPRINTF ((stderr, "Stack %lu dies.\n", + (unsigned long int) yyk)); + yymarkStackDeleted (yystackp, yyk); + break; + } + else + YYCHK (yyglrReduce (yystackp, yyk, -yyaction, + yyfalse]b4_user_args[)); + } } return yyok; } -static void -yyreportSyntaxError (yyGLRStack* yystack, - YYSTYPE* yylvalp, YYLTYPE* yyllocp]b4_user_formals[) +/*ARGSUSED*/ static void +yyreportSyntaxError (yyGLRStack* yystackp]b4_user_formals[) { - /* `Unused' warnings. */ - (void) yylvalp; - (void) 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 (YY_NULL, yytokenName (yytoken)); + size_t yysize = yysize0; + size_t yysize1; + yybool yysize_overflow = yyfalse; + char* yymsg = YY_NULL; + enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + /* Internationalized format string. */ + const char *yyformat = YY_NULL; + /* Arguments of yyformat. */ + char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; + /* Number of reported tokens (one for the "unexpected", one per + "expected"). */ + int yycount = 0; + + /* There are many possibilities here to consider: + - If this state is a consistent state with a default action, then + the only way this function was invoked is if the default action + is an error action. In that case, don't check for expected + tokens because there are none. + - The only way there can be no lookahead present (in yychar) is if + this state is a consistent state with a default action. Thus, + detecting the absence of a lookahead is sufficient to determine + that there is no unexpected or expected token to report. In that + case, just report a simple "syntax error". + - Don't assume there isn't a lookahead just because this state is a + consistent state with a default action. There might have been a + previous inconsistent state, consistent state with a non-default + action, or user semantic action that manipulated yychar. + - Of course, the expected token list depends on states to have + correct lookahead information, and it depends on the parser not + to perform extra reductions after fetching a lookahead from the + scanner and before detecting a syntax error. Thus, state merging + (from LALR or IELR) and default reductions corrupt the expected + token list. However, the list is correct for canonical LR with + one exception: it will still contain any token that will not be + accepted due to an error action in a later state. + */ + if (yytoken != YYEMPTY) + { + int yyn = yypact[yystackp->yytops.yystates[0]->yylrState]; + yyarg[yycount++] = yytokenName (yytoken); + if (!yypact_value_is_default (yyn)) + { + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. In other words, skip the first -YYN actions for this + state because they are default actions. */ + int yyxbegin = yyn < 0 ? -yyn : 0; + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = YYLAST - yyn + 1; + int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; + int yyx; + for (yyx = yyxbegin; yyx < yyxend; ++yyx) + if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR + && !yytable_value_is_error (yytable[yyx + yyn])) + { + if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) + { + yycount = 1; + yysize = yysize0; + break; + } + yyarg[yycount++] = yytokenName (yyx); + yysize1 = yysize + yytnamerr (YY_NULL, yytokenName (yyx)); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; + } + } + } - 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 yysize = 0; - const char* yyprefix; - char* yymsg; - int yyx; - - /* 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 = 0; - - yyprefix = ", expecting "; - for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) - { - yysize += strlen (yyprefix) + strlen (yytokenName (yyx)); - yycount += 1; - if (yycount == 5) - { - yysize = 0; - break; - } - yyprefix = " or "; - } - yysize += (sizeof ("syntax error, unexpected ") - + strlen (yytokenName (*yytokenp))); - yymsg = (char*) malloc (yysize); - if (yymsg != 0) - { - char* yyp = yymsg; - sprintf (yyp, "syntax error, unexpected %s", - yytokenName (*yytokenp)); - yyp += strlen (yyp); - if (yycount < 5) - { - yyprefix = ", expecting "; - for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) - { - sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx)); - yyp += strlen (yyp); - yyprefix = " or "; - } - } - yyerror (]b4_lyyerror_args[yymsg); - free (yymsg); - } - else - yyerror (]b4_lyyerror_args["syntax error; also virtual memory exhausted"); - } - else -#endif /* YYERROR_VERBOSE */ - yyerror (]b4_lyyerror_args["syntax error"); - yynerrs += 1; +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(0, YY_("syntax error")); + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +#undef YYCASE_ + } + + yysize1 = yysize + strlen (yyformat); + yysize_overflow |= yysize1 < yysize; + yysize = yysize1; + + if (!yysize_overflow) + yymsg = (char *) YYMALLOC (yysize); + + if (yymsg) + { + char *yyp = yymsg; + int yyi = 0; + while ((*yyp = *yyformat)) + { + if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) + { + yyp += yytnamerr (yyp, yyarg[yyi++]); + yyformat += 2; + } + else + { + yyp++; + yyformat++; + } + } + yyerror (]b4_lyyerror_args[yymsg); + YYFREE (yymsg); } + else + { + yyerror (]b4_lyyerror_args[YY_("syntax error")); + yyMemoryExhausted (yystackp); + } +#endif /* YYERROR_VERBOSE */ + yynerrs += 1; } -/* Recover from a syntax error on YYSTACK, assuming that YYTOKENP, - YYLVALP, and YYLLOCP point to the syntactic category, semantic - value, and location of the lookahead. */ -static void -yyrecoverSyntaxError (yyGLRStack* yystack, - YYSTYPE* yylvalp, YYLTYPE* 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 == 0) - yystack->yyerrState = 3; - else 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) - { - /* Now pop stack until we find a state that shifts the - error token. */ - while (yystack->yytops.yystates[0] != NULL) - { - yyGLRState *yys = yystack->yytops.yystates[0]; - YYDSYMPRINTF ("Error: popping", - yystos[yys->yylrState], - &yys->yysemantics.yysval, &yys->yyloc); - yydestruct (yystos[yys->yylrState], - &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[); - yystack->yytops.yystates[0] = yys->yypred; - yystack->yynextFree -= 1; - yystack->yyspaceLeft += 1; - } - yyFail (yystack][]b4_lpure_args[, NULL); - } - if (*yytokenp != YYEMPTY) - { - YYDSYMPRINTF ("Error: discarding", *yytokenp, yylvalp, yyllocp); - yydestruct (*yytokenp, yylvalp]b4_location_if([, yyllocp])[); - } - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - *yytokenp = YYTRANSLATE (yychar); - YYDSYMPRINTF ("Next token is", *yytokenp, yylvalp, yyllocp); - yyj = yypact[yystack->yytops.yystates[0]->yylrState]; - if (yyis_pact_ninf (yyj)) - /* Something's not right; we shouldn't be here. */ - yyFail (yystack][]b4_lpure_args[, NULL); - yyj += *yytokenp; - if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != *yytokenp) - { - if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0) - return; - } - else if (yytable[yyj] != 0 && ! yyis_table_ninf (yytable[yyj])) - return; + yySymbol yytoken; + if (yychar == YYEOF) + yyFail (yystackp][]b4_lpure_args[, YY_NULL); + if (yychar != YYEMPTY) + {]b4_locations_if([[ + /* We throw away the lookahead, but the error range + of the shifted error token must take it into account. */ + yyGLRState *yys = yystackp->yytops.yystates[0]; + yyGLRStackItem yyerror_range[3]; + yyerror_range[1].yystate.yyloc = yys->yyloc; + yyerror_range[2].yystate.yyloc = yylloc; + YYLLOC_DEFAULT ((yys->yyloc), yyerror_range, 2);]])[ + yytoken = YYTRANSLATE (yychar); + yydestruct ("Error: discarding", + yytoken, &yylval]b4_locuser_args([&yylloc])[); + } + YYDPRINTF ((stderr, "Reading a token: ")); + yychar = YYLEX; + if (yychar <= YYEOF) + { + yychar = yytoken = YYEOF; + YYDPRINTF ((stderr, "Now at end of input.\n")); + } + else + { + yytoken = YYTRANSLATE (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); + } + yyj = yypact[yystackp->yytops.yystates[0]->yylrState]; + if (yypact_value_is_default (yyj)) + return; + yyj += yytoken; + if (yyj < 0 || YYLAST < yyj || yycheck[yyj] != yytoken) + { + if (yydefact[yystackp->yytops.yystates[0]->yylrState] != 0) + return; + } + else if (! yytable_value_is_error (yytable[yyj])) + return; } /* Reduce to one stack. */ - for (yyk = 0; yyk < 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] != YY_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. */ - while (yystack->yytops.yystates[0] != NULL) + if (yyk >= yystackp->yytops.yysize) + yyFail (yystackp][]b4_lpure_args[, YY_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] != YY_NULL) { - yyGLRState *yys = yystack->yytops.yystates[0]; + yyGLRState *yys = yystackp->yytops.yystates[0]; yyj = yypact[yys->yylrState]; - if (! yyis_pact_ninf (yyj)) - { - yyj += YYTERROR; - if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR - && yyisShiftAction (yytable[yyj])) - { - YYDPRINTF ((stderr, "Shifting error token, ")); - yyglrShift (yystack, 0, yytable[yyj], - yys->yyposn, *yylvalp, yyllocp]b4_user_args[); - break; - } - } - YYDSYMPRINTF ("Error: popping", - yystos[yys->yylrState], - &yys->yysemantics.yysval, &yys->yyloc); - yydestruct (yystos[yys->yylrState], - &yys->yysemantics.yysval]b4_location_if([, &yys->yyloc])[); - yystack->yytops.yystates[0] = yys->yypred; - yystack->yynextFree -= 1; - yystack->yyspaceLeft += 1; + if (! yypact_value_is_default (yyj)) + { + yyj += YYTERROR; + if (0 <= yyj && yyj <= YYLAST && yycheck[yyj] == YYTERROR + && yyisShiftAction (yytable[yyj])) + { + /* Shift the error token. */]b4_locations_if([[ + /* First adjust its location.*/ + YYLTYPE yyerrloc; + yystackp->yyerror_range[2].yystate.yyloc = yylloc; + YYLLOC_DEFAULT (yyerrloc, (yystackp->yyerror_range), 2);]])[ + YY_SYMBOL_PRINT ("Shifting", yystos[yytable[yyj]], + &yylval, &yyerrloc); + yyglrShift (yystackp, 0, yytable[yyj], + yys->yyposn, &yylval]b4_locations_if([, &yyerrloc])[); + yys = yystackp->yytops.yystates[0]; + break; + } + }]b4_locations_if([[ + yystackp->yyerror_range[1].yystate.yyloc = yys->yyloc;]])[ + if (yys->yypred != YY_NULL) + yydestroyGLRState ("Error: popping", yys]b4_user_args[); + yystackp->yytops.yystates[0] = yys->yypred; + yystackp->yynextFree -= 1; + yystackp->yyspaceLeft += 1; } - if (yystack->yytops.yystates[0] == NULL) - yyFail (yystack][]b4_lpure_args[, NULL); + if (yystackp->yytops.yystates[0] == YY_NULL) + yyFail (yystackp][]b4_lpure_args[, YY_NULL); } -#define YYCHK1(YYE) \ - do { \ - switch (YYE) { \ - default: \ - break; \ - case yyabort: \ - yystack.yyerrflag = 1; \ - goto yyDone; \ - case yyaccept: \ - yystack.yyerrflag = 0; \ - goto yyDone; \ - case yyerr: \ - goto yyuser_error; \ - } \ - } while (0) +#define YYCHK1(YYE) \ + do { \ + switch (YYE) { \ + case yyok: \ + break; \ + case yyabort: \ + goto yyabortlab; \ + case yyaccept: \ + goto yyacceptlab; \ + case yyerr: \ + goto yyuser_error; \ + default: \ + goto yybuglab; \ + } \ + } while (YYID (0)) /*----------. @@ -1783,135 +2301,252 @@ yyrecoverSyntaxError (yyGLRStack* yystack, ]b4_c_ansi_function_def([yyparse], [int], b4_parse_param)[ { - yySymbol yytoken; + int yyresult; 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; - - yyinitGLRStack (&yystack, YYINITDEPTH); - yystack.yytokenp = &yytoken; YYDPRINTF ((stderr, "Starting parse\n")); - if (setjmp (yystack.yyexception_buffer) != 0) - goto yyDone; - - yyglrShift (&yystack, 0, 0, 0, yyval_default, &yyloc_default]b4_user_args[); - yytoken = YYEMPTY; + yychar = YYEMPTY; + yylval = yyval_default; +]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_user_initial_action +m4_popdef([b4_dollar_dollar])dnl +m4_popdef([b4_at_dollar])])dnl +[ + if (! yyinitGLRStack (yystackp, YYINITDEPTH)) + goto yyexhaustedlab; + switch (YYSETJMP (yystack.yyexception_buffer)) + { + case 0: break; + case 1: goto yyabortlab; + case 2: goto yyexhaustedlab; + default: goto yybuglab; + } + yyglrShift (&yystack, 0, 0, 0, &yylval]b4_locations_if([, &yylloc])[); yyposn = 0; - while (yytrue) + while (YYID (yytrue)) { /* For efficiency, we have two loops, the first of which is - specialized to deterministic operation (single stack, no - potential ambiguity). */ + specialized to deterministic operation (single stack, no + potential ambiguity). */ /* Standard mode */ - while (yytrue) - { - yyRuleNum yyrule; - int yyaction; - const short* yyconflicts; + while (YYID (yytrue)) + { + yyRuleNum yyrule; + int yyaction; + const short int* yyconflicts; - yyStateNum yystate = yystack.yytops.yystates[0]->yylrState; + yyStateNum yystate = yystack.yytops.yystates[0]->yylrState; YYDPRINTF ((stderr, "Entering state %d\n", yystate)); - if (yystate == YYFINAL) - goto yyDone; - if (yyisDefaultedState (yystate)) - { - yyrule = yydefaultAction (yystate); - if (yyrule == 0) - { - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); - goto yyuser_error; - } - YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_lpure_args[)); - } - else - { - if (yytoken == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; - yytoken = YYTRANSLATE (yychar); - YYDSYMPRINTF ("Next token is", yytoken, yylvalp, yyllocp); - } - yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts); - if (*yyconflicts != 0) - break; - if (yyisShiftAction (yyaction)) - { - YYDPRINTF ((stderr, "Shifting token %s, ", - yytokenName (yytoken))); - if (yytoken != YYEOF) - yytoken = YYEMPTY; - yyposn += 1; - yyglrShift (&yystack, 0, yyaction, yyposn, - yylval, yyllocp]b4_user_args[); - if (0 < yystack.yyerrState) - yystack.yyerrState -= 1; - } - else if (yyisErrorAction (yyaction)) - { - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); - goto yyuser_error; - } - else - YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_lpure_args[)); - } - } - - while (yytrue) - { - int yys; - int yyn = yystack.yytops.yysize; - for (yys = 0; yys < yyn; yys += 1) - YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn, - yylvalp, yyllocp]b4_user_args[)); - yytoken = YYEMPTY; - yyposn += 1; - yyremoveDeletes (&yystack); - if (yystack.yytops.yysize == 0) - { - yyundeleteLastStack (&yystack); - if (yystack.yytops.yysize == 0) - yyFail (&yystack][]b4_lpure_args[, "syntax error"); - YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); - YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); - yyreportSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); - goto yyuser_error; - } - else if (yystack.yytops.yysize == 1) - { - YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); - YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); - yycompressStack (&yystack); - break; - } - } + if (yystate == YYFINAL) + goto yyacceptlab; + if (yyisDefaultedState (yystate)) + { + yyrule = yydefaultAction (yystate); + if (yyrule == 0) + { +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ + yyreportSyntaxError (&yystack]b4_user_args[); + goto yyuser_error; + } + YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue]b4_user_args[)); + } + else + { + yySymbol yytoken; + if (yychar == YYEMPTY) + { + YYDPRINTF ((stderr, "Reading a token: ")); + yychar = YYLEX; + } + + if (yychar <= YYEOF) + { + yychar = yytoken = YYEOF; + YYDPRINTF ((stderr, "Now at end of input.\n")); + } + else + { + yytoken = YYTRANSLATE (yychar); + YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc); + } + + yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts); + if (*yyconflicts != 0) + break; + if (yyisShiftAction (yyaction)) + { + YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); + yychar = YYEMPTY; + yyposn += 1; + yyglrShift (&yystack, 0, yyaction, yyposn, &yylval]b4_locations_if([, &yylloc])[); + if (0 < yystack.yyerrState) + yystack.yyerrState -= 1; + } + else if (yyisErrorAction (yyaction)) + { +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ + yyreportSyntaxError (&yystack]b4_user_args[); + goto yyuser_error; + } + else + YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue]b4_user_args[)); + } + } + + while (YYID (yytrue)) + { + yySymbol yytoken_to_shift; + size_t yys; + + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) + yystackp->yytops.yylookaheadNeeds[yys] = yychar != YYEMPTY; + + /* yyprocessOneStack returns one of three things: + + - An error flag. If the caller is yyprocessOneStack, it + immediately returns as well. When the caller is finally + yyparse, it jumps to an error label via YYCHK1. + + - yyok, but yyprocessOneStack has invoked yymarkStackDeleted + (&yystack, yys), which sets the top state of yys to NULL. Thus, + yyparse's following invocation of yyremoveDeletes will remove + the stack. + + - yyok, when ready to shift a token. + + Except in the first case, yyparse will invoke yyremoveDeletes and + then shift the next token onto all remaining stacks. This + synchronization of the shift (that is, after all preceding + reductions on all stacks) helps prevent double destructor calls + on yylval in the event of memory exhaustion. */ + + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) + YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn]b4_lpure_args[)); + yyremoveDeletes (&yystack); + if (yystack.yytops.yysize == 0) + { + yyundeleteLastStack (&yystack); + if (yystack.yytops.yysize == 0) + yyFail (&yystack][]b4_lpure_args[, YY_("syntax error")); + YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); + YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yylloc;]])[ + yyreportSyntaxError (&yystack]b4_user_args[); + goto yyuser_error; + } + + /* If any yyglrShift call fails, it will fail after shifting. Thus, + a copy of yylval will already be on stack 0 in the event of a + failure in the following loop. Thus, yychar is set to YYEMPTY + before the loop to make sure the user destructor for yylval isn't + called twice. */ + yytoken_to_shift = YYTRANSLATE (yychar); + yychar = YYEMPTY; + yyposn += 1; + for (yys = 0; yys < yystack.yytops.yysize; yys += 1) + { + int yyaction; + const short int* yyconflicts; + yyStateNum yystate = yystack.yytops.yystates[yys]->yylrState; + yygetLRActions (yystate, yytoken_to_shift, &yyaction, + &yyconflicts); + /* Note that yyconflicts were handled by yyprocessOneStack. */ + YYDPRINTF ((stderr, "On stack %lu, ", (unsigned long int) yys)); + YY_SYMBOL_PRINT ("shifting", yytoken_to_shift, &yylval, &yylloc); + yyglrShift (&yystack, yys, yyaction, yyposn, + &yylval]b4_locations_if([, &yylloc])[); + YYDPRINTF ((stderr, "Stack %lu now in state #%d\n", + (unsigned long int) yys, + yystack.yytops.yystates[yys]->yylrState)); + } + + if (yystack.yytops.yysize == 1) + { + YYCHK1 (yyresolveStack (&yystack]b4_user_args[)); + YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); + yycompressStack (&yystack); + break; + } + } continue; yyuser_error: - yyrecoverSyntaxError (&yystack, yylvalp, yyllocp]b4_user_args[); + yyrecoverSyntaxError (&yystack]b4_user_args[); yyposn = yystack.yytops.yystates[0]->yyposn; } - yyDone: - ; - yyfreeGLRStack (&yystack); - return yystack.yyerrflag; + yyacceptlab: + yyresult = 0; + goto yyreturn; + + yybuglab: + YYASSERT (yyfalse); + goto yyabortlab; + + yyabortlab: + yyresult = 1; + goto yyreturn; + + yyexhaustedlab: + yyerror (]b4_lyyerror_args[YY_("memory exhausted")); + yyresult = 2; + goto yyreturn; + + yyreturn: + if (yychar != YYEMPTY) + yydestruct ("Cleanup: discarding lookahead", + YYTRANSLATE (yychar), &yylval]b4_locuser_args([&yylloc])[); + + /* If the stack is well-formed, pop the stack until it is empty, + destroying its entries as we go. But free the stack regardless + of whether it is well-formed. */ + if (yystack.yyitems) + { + yyGLRState** yystates = yystack.yytops.yystates; + if (yystates) + { + size_t yysize = yystack.yytops.yysize; + size_t yyk; + for (yyk = 0; yyk < yysize; yyk += 1) + if (yystates[yyk]) + { + while (yystates[yyk]) + { + yyGLRState *yys = yystates[yyk]; +]b4_locations_if([[ yystack.yyerror_range[1].yystate.yyloc = yys->yyloc;]] +)[ if (yys->yypred != YY_NULL) + yydestroyGLRState ("Cleanup: popping", yys]b4_user_args[); + yystates[yyk] = yys->yypred; + yystack.yynextFree -= 1; + yystack.yyspaceLeft += 1; + } + break; + } + } + yyfreeGLRStack (&yystack); + } + + /* Make sure YYID is used. */ + return YYID (yyresult); } /* DEBUGGING ONLY */ -static void yypstack (yyGLRStack* yystack, int yyk) ATTRIBUTE_UNUSED; -static void yypdumpstack (yyGLRStack* yystack) ATTRIBUTE_UNUSED; +#if YYDEBUG +static void yypstack (yyGLRStack* yystackp, size_t yyk) + __attribute__ ((__unused__)); +static void yypdumpstack (yyGLRStack* yystackp) __attribute__ ((__unused__)); static void yy_yypstack (yyGLRState* yys) @@ -1919,101 +2554,82 @@ yy_yypstack (yyGLRState* yys) if (yys->yypred) { yy_yypstack (yys->yypred); - fprintf (stderr, " -> "); + YYFPRINTF (stderr, " -> "); } - fprintf (stderr, "%d@@%lu", yys->yylrState, (unsigned long) yys->yyposn); + YYFPRINTF (stderr, "%d@@%lu", yys->yylrState, + (unsigned long int) yys->yyposn); } static void yypstates (yyGLRState* yyst) { - if (yyst == NULL) - fprintf (stderr, ""); + if (yyst == YY_NULL) + YYFPRINTF (stderr, ""); else yy_yypstack (yyst); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "\n"); } static void -yypstack (yyGLRStack* yystack, int 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) +#define YYINDEX(YYX) \ + ((YYX) == YY_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) (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) yyp->yystate.yyposn, - (long) YYINDEX (yyp->yystate.yypred)); - if (! yyp->yystate.yyresolved) - fprintf (stderr, ", firstVal: %ld", - (long) YYINDEX (yyp->yystate.yysemantics.yyfirstVal)); - } + { + YYFPRINTF (stderr, "Res: %d, LR State: %d, posn: %lu, pred: %ld", + yyp->yystate.yyresolved, yyp->yystate.yylrState, + (unsigned long int) yyp->yystate.yyposn, + (long int) YYINDEX (yyp->yystate.yypred)); + if (! yyp->yystate.yyresolved) + YYFPRINTF (stderr, ", firstVal: %ld", + (long int) YYINDEX (yyp->yystate + .yysemantics.yyfirstVal)); + } else - { - fprintf (stderr, "Option. rule: %d, state: %ld, next: %ld", - yyp->yyoption.yyrule, - (long) YYINDEX (yyp->yyoption.yystate), - (long) YYINDEX (yyp->yyoption.yynext)); - } - fprintf (stderr, "\n"); + { + YYFPRINTF (stderr, "Option. rule: %d, state: %ld, next: %ld", + yyp->yyoption.yyrule - 1, + (long int) YYINDEX (yyp->yyoption.yystate), + (long int) YYINDEX (yyp->yyoption.yynext)); + } + YYFPRINTF (stderr, "\n"); } - fprintf (stderr, "Tops:"); - for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) - fprintf (stderr, "%lu: %ld; ", (unsigned long) yyi, - (long) 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]) - -b4_token_defines(b4_tokens) - -#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED) -m4_ifdef([b4_stype], -[b4_syncline([b4_stype_line], [b4_filename]) -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_pure_if([], -[extern YYSTYPE b4_prefix[]lval;]) - -b4_location_if( -[#if ! defined (YYLTYPE) && ! defined (YYLTYPE_IS_DECLARED) -typedef struct YYLTYPE -{ - int first_line; - int first_column; - int last_line; - int last_column; -} YYLTYPE; -# define YYLTYPE_IS_DECLARED 1 -# define YYLTYPE_IS_TRIVIAL 1 -#endif - -m4_if(b4_pure, [0], -[extern YYLTYPE b4_prefix[]lloc;]) -]) -]) +dnl +dnl glr.cc produces its own header. +dnl +m4_if(b4_skeleton, ["glr.c"], +[b4_defines_if( +[@output(b4_spec_defines_file@)@ +b4_copyright([Skeleton interface for Bison GLR parsers in C], + [2002-2012])[ + +]b4_cpp_guard_open([b4_spec_defines_file])[ +]b4_shared_declarations[ +]b4_cpp_guard_close([b4_spec_defines_file])[ +]])]) +m4_divert_pop(0)