X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a2ea208d82fdd67257d16e11b93ab17a8c48d452..fd003416d59cae9645d164b12495eb186efee848:/data/yacc.c?ds=sidebyside diff --git a/data/yacc.c b/data/yacc.c index 8fe8596f..88277a91 100644 --- a/data/yacc.c +++ b/data/yacc.c @@ -1,27 +1,55 @@ -*- C -*- - # Yacc compatible skeleton for Bison -# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, -# 2007 Free Software Foundation, Inc. +# Copyright (C) 1984, 1989-1990, 2000-2013 Free Software Foundation, +# Inc. + +m4_pushdef([b4_copyright_years], + [1984, 1989-1990, 2000-2013]) -# This program is free software; you can redistribute it and/or modify +# This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or +# the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. - +# # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. - +# # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301 USA - -# Handle BISON_USE_PUSH_FOR_PULL for the test suite. -b4_use_push_for_pull_if([m4_include(b4_pkgdatadir/[push.c])], [ +# along with this program. If not, see . + +# Check the value of %define api.push-pull. +b4_percent_define_default([[api.push-pull]], [[pull]]) +b4_percent_define_check_values([[[[api.push-pull]], + [[pull]], [[push]], [[both]]]]) +b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]]) +b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]]) +m4_case(b4_percent_define_get([[api.push-pull]]), + [pull], [m4_define([b4_push_flag], [[0]])], + [push], [m4_define([b4_pull_flag], [[0]])]) + +# Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing +# tests function as written, do not let BISON_USE_PUSH_FOR_PULL modify the +# behavior of Bison at all when push parsing is already requested. +b4_define_flag_if([use_push_for_pull]) +b4_use_push_for_pull_if([ + b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])], + [m4_define([b4_push_flag], [[1]])])]) + +# Check the value of %define parse.lac and friends, where LAC stands for +# lookahead correction. +b4_percent_define_default([[parse.lac]], [[none]]) +b4_percent_define_default([[parse.lac.es-capacity-initial]], [[20]]) +b4_percent_define_default([[parse.lac.memory-trace]], [[failures]]) +b4_percent_define_check_values([[[[parse.lac]], [[full]], [[none]]]], + [[[[parse.lac.memory-trace]], + [[failures]], [[full]]]]) +b4_define_flag_if([lac]) +m4_define([b4_lac_flag], + [m4_if(b4_percent_define_get([[parse.lac]]), + [none], [[0]], [[1]])]) m4_include(b4_pkgdatadir/[c.m4]) @@ -38,32 +66,38 @@ m4_define_default([b4_stack_depth_init], [200]) ## Pure/impure interfaces. ## ## ------------------------ ## - -# b4_yacc_pure_if(IF-TRUE, IF-FALSE) -# ---------------------------------- -# Expand IF-TRUE, if %pure-parser and %parse-param, IF-FALSE otherwise. -m4_define([b4_yacc_pure_if], -[b4_pure_if([m4_ifset([b4_parse_param], - [$1], [$2])], - [$2])]) - +b4_percent_define_default([[api.pure]], [[false]]) +b4_percent_define_check_values([[[[api.pure]], + [[false]], [[true]], [[]], [[full]]]]) + +m4_define([b4_pure_flag], [[0]]) +m4_case(b4_percent_define_get([[api.pure]]), + [false], [m4_define([b4_pure_flag], [[0]])], + [true], [m4_define([b4_pure_flag], [[1]])], + [], [m4_define([b4_pure_flag], [[1]])], + [full], [m4_define([b4_pure_flag], [[2]])]) + +m4_define([b4_pure_if], +[m4_case(b4_pure_flag, + [0], [$2], + [1], [$1], + [2], [$1])]) + [m4_fatal([invalid api.pure value: ]$1)])]) + +# b4_yyerror_arg_loc_if(ARG) +# -------------------------- +# Expand ARG iff yyerror is to be given a location as argument. +m4_define([b4_yyerror_arg_loc_if], +[b4_locations_if([m4_case(b4_pure_flag, + [1], [m4_ifset([b4_parse_param], [$1])], + [2], [$1])])]) # b4_yyerror_args # --------------- # Arguments passed to yyerror: user args plus yylloc. m4_define([b4_yyerror_args], -[b4_yacc_pure_if([b4_locations_if([&yylloc, ])])dnl -m4_ifset([b4_parse_param], [b4_c_args(b4_parse_param), ])]) - - -# b4_lex_param -# ------------ -# Accumulate in b4_lex_param all the yylex arguments. -# b4_lex_param arrives quoted twice, but we want to keep only one level. -m4_define([b4_lex_param], -m4_dquote(b4_pure_if([[[[YYSTYPE *]], [[&yylval]]][]dnl -b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl -m4_ifdef([b4_lex_param], b4_lex_param))) +[b4_yyerror_arg_loc_if([&yylloc, ])dnl +m4_ifset([b4_parse_param], [b4_args(b4_parse_param), ])]) @@ -86,7 +120,7 @@ m4_define([b4_int_type], m4_eval([0 <= $1]), [1], [unsigned int], - [int])]) + [int])]) ## ----------------- ## @@ -98,7 +132,7 @@ m4_define([b4_int_type], # -------------------- # Expansion of $$. m4_define([b4_lhs_value], -[(yyval[]m4_ifval([$1], [.$1]))]) +[b4_symbol_value(yyval, [$1])]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) @@ -106,7 +140,7 @@ m4_define([b4_lhs_value], # Expansion of $NUM, where the current rule has RULE-LENGTH # symbols on RHS. m4_define([b4_rhs_value], -[(yyvsp@{($2) - ($1)@}m4_ifval([$3], [.$3]))]) + [b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3])]) @@ -126,20 +160,165 @@ m4_define([b4_lhs_location], # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], -[(yylsp@{($2) - ($1)@})]) + [(yylsp@{b4_subtract([$2], [$1])@})]) + + +## -------------- ## +## Declarations. ## +## -------------- ## + +# b4_declare_scanner_communication_variables +# ------------------------------------------ +# Declare the variables that are global, or local to YYPARSE if +# pure-parser. +m4_define([b4_declare_scanner_communication_variables], [[ +/* The lookahead symbol. */ +int yychar; + +]b4_pure_if([[ +#if defined __GNUC__ && 407 <= __GNUC__ * 100 + __GNUC_MINOR__ +/* Suppress an incorrect diagnostic about yylval being uninitialized. */ +# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN \ + _Pragma ("GCC diagnostic push") \ + _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")\ + _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"") +# define YY_IGNORE_MAYBE_UNINITIALIZED_END \ + _Pragma ("GCC diagnostic pop") +#else +/* Default value used for initialization, for pacifying older GCCs + or non-GCC compilers. */ +static YYSTYPE yyval_default; +# define YY_INITIAL_VALUE(Value) = Value +#endif]b4_locations_if([[ +static YYLTYPE yyloc_default][]b4_yyloc_default[;]])])[ +#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN +# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN +# define YY_IGNORE_MAYBE_UNINITIALIZED_END +#endif +#ifndef YY_INITIAL_VALUE +# define YY_INITIAL_VALUE(Value) /* Nothing. */ +#endif + +/* The semantic value of the lookahead symbol. */ +YYSTYPE yylval YY_INITIAL_VALUE(yyval_default);]b4_locations_if([[ +/* Location data for the lookahead symbol. */ +YYLTYPE yylloc]b4_pure_if([ = yyloc_default], [b4_yyloc_default])[; +]])b4_pure_if([], [[ + +/* Number of syntax errors so far. */ +int yynerrs;]])]) -## --------------------------------------------------------- ## -## Defining symbol actions, e.g., printers and destructors. ## -## --------------------------------------------------------- ## +# b4_declare_parser_state_variables +# --------------------------------- +# Declare all the variables that are needed to maintain the parser state +# between calls to yypush_parse. +m4_define([b4_declare_parser_state_variables], [b4_pure_if([[ + /* Number of syntax errors so far. */ + int yynerrs; +]])[ + int yystate; + /* Number of tokens to shift before error messages enabled. */ + int yyerrstatus; + + /* The stacks and their tools: + `yyss': related to states. + `yyvs': related to semantic values.]b4_locations_if([[ + `yyls': related to locations.]])[ + + Refer to the stacks through separate pointers, to allow yyoverflow + to reallocate them elsewhere. */ + + /* The state stack. */ + yytype_int16 yyssa[YYINITDEPTH]; + yytype_int16 *yyss; + yytype_int16 *yyssp; + + /* The semantic value stack. */ + YYSTYPE yyvsa[YYINITDEPTH]; + YYSTYPE *yyvs; + YYSTYPE *yyvsp;]b4_locations_if([[ + + /* The location stack. */ + YYLTYPE yylsa[YYINITDEPTH]; + YYLTYPE *yyls; + YYLTYPE *yylsp; + + /* The locations where the error started and ended. */ + YYLTYPE yyerror_range[3];]])[ + + YYSIZE_T yystacksize;]b4_lac_if([[ + + yytype_int16 yyesa@{]b4_percent_define_get([[parse.lac.es-capacity-initial]])[@}; + yytype_int16 *yyes; + YYSIZE_T yyes_capacity;]])]) + + +# b4_declare_yyparse_push_ +# ------------------------ +# Declaration of yyparse (and dependencies) when using the push parser +# (including in pull mode). +m4_define([b4_declare_yyparse_push_], +[[#ifndef YYPUSH_MORE_DEFINED +# define YYPUSH_MORE_DEFINED +enum { YYPUSH_MORE = 4 }; +#endif + +typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; + +]b4_pull_if([b4_function_declare([b4_prefix[parse]], [[int]], b4_parse_param) +])b4_function_declare([b4_prefix[push_parse]], [[int]], + [[b4_prefix[pstate *ps]], [[ps]]]b4_pure_if([, + [[[int pushed_char]], [[pushed_char]]], + [[b4_api_PREFIX[STYPE const *pushed_val]], [[pushed_val]]]b4_locations_if([, + [[b4_api_PREFIX[LTYPE *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param])) +b4_pull_if([b4_function_declare([b4_prefix[pull_parse]], [[int]], + [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))]) +b4_function_declare([b4_prefix[pstate_new]], [b4_prefix[pstate *]], + [[[void]], []]) +b4_function_declare([b4_prefix[pstate_delete]], [[void]], + [[b4_prefix[pstate *ps]], [[ps]]])dnl +]) -# We do want M4 expansion after # for CPP macros. -m4_changecom() -m4_divert_push(0)dnl -@output(b4_parser_file_name@) -b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl ' - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[ +# b4_declare_yyparse_ +# ------------------- +# When not the push parser. +m4_define([b4_declare_yyparse_], +[b4_function_declare(b4_prefix[parse], [int], b4_parse_param)]) + + +# b4_declare_yyparse +# ------------------ +m4_define([b4_declare_yyparse], +[b4_push_if([b4_declare_yyparse_push_], + [b4_declare_yyparse_])[]dnl +]) + + +# b4_shared_declarations +# ---------------------- +# Declaration that might either go into the header (if --defines) +# or open coded in the parser body. +m4_define([b4_shared_declarations], +[b4_cpp_guard_open([b4_spec_defines_file])[ +]b4_declare_yydebug[ +]b4_percent_code_get([[requires]])[ +]b4_token_enums_defines[ +]b4_declare_yylstype[ +]b4_declare_yyparse[ +]b4_percent_code_get([[provides]])[ +]b4_cpp_guard_close([b4_spec_defines_file])[]dnl +]) + +## -------------- ## +## Output files. ## +## -------------- ## + +b4_output_begin([b4_parser_file_name]) +b4_copyright([Bison implementation for Yacc-like parsers in C])[ /* C LALR(1) parser skeleton written by Richard Stallman, by simplifying the original so-called "semantic" parser. */ @@ -153,72 +332,47 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl ' ]b4_identification b4_percent_code_get([[top]])[]dnl -m4_if(b4_prefix, [yy], [], -[/* Substitute the variable and function names. */ -#define yyparse b4_prefix[]parse -#define yylex b4_prefix[]lex -#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])])[ +m4_if(b4_api_prefix, [yy], [], +[[/* Substitute the type names. */ +#define YYSTYPE ]b4_api_PREFIX[STYPE]b4_locations_if([[ +#define YYLTYPE ]b4_api_PREFIX[LTYPE]])])[ +]m4_if(b4_prefix, [yy], [], +[[/* Substitute the variable and function names. */]b4_pull_if([[ +#define yyparse ]b4_prefix[parse]])b4_push_if([[ +#define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[ +#define yypull_parse ]b4_prefix[pull_parse]])[ +#define yypstate_new ]b4_prefix[pstate_new +#define yypstate_delete ]b4_prefix[pstate_delete +#define yypstate ]b4_prefix[pstate]])[ +#define yylex ]b4_prefix[lex +#define yyerror ]b4_prefix[error +#define yydebug ]b4_prefix[debug +#define yynerrs ]b4_prefix[nerrs +]]b4_pure_if([], [[ +#define yylval ]b4_prefix[lval +#define yychar ]b4_prefix[char]b4_locations_if([[ +#define yylloc ]b4_prefix[lloc]])]))[ /* Copy the first part of user declarations. */ ]b4_user_pre_prologue[ -/* Enabling traces. */ -#ifndef YYDEBUG -# define YYDEBUG ]b4_debug_flag[ -#endif +]b4_null_define[ /* Enabling verbose error messages. */ #ifdef YYERROR_VERBOSE # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else -# define YYERROR_VERBOSE ]b4_error_verbose_flag[ -#endif - -/* Enabling the token table. */ -#ifndef YYTOKEN_TABLE -# define YYTOKEN_TABLE ]b4_token_table[ +# define YYERROR_VERBOSE ]b4_error_verbose_if([1], [0])[ #endif -]b4_percent_code_get([[requires]])[]dnl - -b4_token_enums_defines(b4_tokens)[ - -#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED -]m4_ifdef([b4_stype], -[[typedef union ]b4_union_name[ -{ -]b4_user_stype[ -} YYSTYPE; -# define YYSTYPE_IS_TRIVIAL 1]], -[m4_if(b4_tag_seen_flag, 0, -[[typedef int YYSTYPE; -# define YYSTYPE_IS_TRIVIAL 1]])])[ -# define yystype YYSTYPE /* obsolescent; will be withdrawn */ -# define YYSTYPE_IS_DECLARED 1 -#endif +]m4_ifval(m4_quote(b4_spec_defines_file), +[[/* In a future release of Bison, this section will be replaced + by #include "@basename(]b4_spec_defines_file[@)". */ +]])dnl +b4_shared_declarations[ -]b4_locations_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 YYLTYPE /* obsolescent; will be withdrawn */ -# define YYLTYPE_IS_DECLARED 1 -# define YYLTYPE_IS_TRIVIAL 1 -#endif]) - -b4_percent_code_get([[provides]])[]dnl - -[/* Copy the second part of user declarations. */ +/* Copy the second part of user declarations. */ ]b4_user_post_prologue b4_percent_code_get[]dnl @@ -234,10 +388,8 @@ typedef unsigned char yytype_uint8; #ifdef YYTYPE_INT8 typedef YYTYPE_INT8 yytype_int8; -#elif ]b4_c_modern[ -typedef signed char yytype_int8; #else -typedef short int yytype_int8; +typedef signed char yytype_int8; #endif #ifdef YYTYPE_UINT16 @@ -257,7 +409,7 @@ typedef short int yytype_int16; # define YYSIZE_T __SIZE_TYPE__ # elif defined size_t # define YYSIZE_T size_t -# elif ! defined YYSIZE_T && ]b4_c_modern[ +# elif ! defined YYSIZE_T # include /* INFRINGES ON USER NAME SPACE */ # define YYSIZE_T size_t # else @@ -268,37 +420,28 @@ typedef short int yytype_int16; #define YYSIZE_MAXIMUM ((YYSIZE_T) -1) #ifndef YY_ -# if YYENABLE_NLS +# if defined YYENABLE_NLS && YYENABLE_NLS # if ENABLE_NLS # include /* INFRINGES ON USER NAME SPACE */ -# define YY_(msgid) dgettext ("bison-runtime", msgid) +# define YY_(Msgid) dgettext ("bison-runtime", Msgid) # endif # endif # ifndef YY_ -# define YY_(msgid) msgid +# define YY_(Msgid) Msgid # endif #endif /* Suppress unused-variable warnings by "using" E. */ -#if ! defined lint || defined __GNUC__ -# define YYUSE(e) ((void) (e)) +#ifdef __GNUC__ +# define YYUSE(E) ((void) (E)) #else -# define YYUSE(e) /* empty */ +# define YYUSE(E) /* empty */ #endif -/* Identity function, used to suppress warnings about constant conditions. */ -#ifndef lint -# define YYID(n) (n) -#else -]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[ -{ - return yyi; -} -#endif - -#if ! defined yyoverflow || YYERROR_VERBOSE +#if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[ -/* The parser invokes alloca or malloc; define the necessary symbols. */ +/* The parser invokes alloca or malloc; define the necessary symbols. */]dnl +b4_push_if([], [b4_lac_if([], [[ # ifdef YYSTACK_USE_ALLOCA # if YYSTACK_USE_ALLOCA @@ -313,19 +456,20 @@ typedef short int yytype_int16; # define alloca _alloca # else # define YYSTACK_ALLOC alloca -# if ! defined _ALLOCA_H && ! defined _STDLIB_H && ]b4_c_modern[ +# if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS # include /* INFRINGES ON USER NAME SPACE */ -# ifndef _STDLIB_H -# define _STDLIB_H 1 + /* Use EXIT_SUCCESS as a witness for stdlib.h. */ +# ifndef EXIT_SUCCESS +# define EXIT_SUCCESS 0 # endif # endif # endif # endif -# endif +# endif]])])[ # ifdef YYSTACK_ALLOC /* Pacify GCC's `empty if-body' warning. */ -# define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0)) +# define YYSTACK_FREE(Ptr) do { /* empty */; } while (0) # ifndef YYSTACK_ALLOC_MAXIMUM /* The OS might guarantee only one guard page at the bottom of the stack, and a page size can be as small as 4096 bytes. So we cannot safely @@ -339,43 +483,43 @@ typedef short int yytype_int16; # ifndef YYSTACK_ALLOC_MAXIMUM # define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM # endif -# if (defined __cplusplus && ! defined _STDLIB_H \ +# if (defined __cplusplus && ! defined EXIT_SUCCESS \ && ! ((defined YYMALLOC || defined malloc) \ - && (defined YYFREE || defined free))) + && (defined YYFREE || defined free))) # include /* INFRINGES ON USER NAME SPACE */ -# ifndef _STDLIB_H -# define _STDLIB_H 1 +# ifndef EXIT_SUCCESS +# define EXIT_SUCCESS 0 # endif # endif # ifndef YYMALLOC # define YYMALLOC malloc -# if ! defined malloc && ! defined _STDLIB_H && ]b4_c_modern[ +# if ! defined malloc && ! defined EXIT_SUCCESS void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */ # endif # endif # ifndef YYFREE # define YYFREE free -# if ! defined free && ! defined _STDLIB_H && ]b4_c_modern[ +# if ! defined free && ! defined EXIT_SUCCESS void free (void *); /* INFRINGES ON USER NAME SPACE */ # endif # endif -# endif -#endif /* ! defined yyoverflow || YYERROR_VERBOSE */ +# endif]b4_lac_if([[ +# define YYCOPY_NEEDED 1]])[ +#endif]b4_lac_if([], [[ /* ! defined yyoverflow || YYERROR_VERBOSE */]])[ #if (! defined yyoverflow \ && (! defined __cplusplus \ - || (]b4_locations_if([[defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL \ - && ]])[defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL))) + || (]b4_locations_if([[defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL \ + && ]])[defined ]b4_api_PREFIX[STYPE_IS_TRIVIAL && ]b4_api_PREFIX[STYPE_IS_TRIVIAL))) /* A type that is properly aligned for any stack member. */ union yyalloc { - yytype_int16 yyss; - YYSTYPE yyvs; - ]b4_locations_if([ YYLTYPE yyls; -])dnl -[}; + yytype_int16 yyss_alloc; + YYSTYPE yyvs_alloc;]b4_locations_if([ + YYLTYPE yyls_alloc;])[ +}; /* The size of the maximum gap between one aligned stack and the next. */ # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1) @@ -390,42 +534,46 @@ union yyalloc ((N) * (sizeof (yytype_int16) + sizeof (YYSTYPE)) \ + YYSTACK_GAP_MAXIMUM)])[ -/* Copy COUNT objects from FROM to TO. The source and destination do - not overlap. */ -# ifndef YYCOPY -# if defined __GNUC__ && 1 < __GNUC__ -# define YYCOPY(To, From, Count) \ - __builtin_memcpy (To, From, (Count) * sizeof (*(From))) -# else -# define YYCOPY(To, From, Count) \ - do \ - { \ - YYSIZE_T yyi; \ - for (yyi = 0; yyi < (Count); yyi++) \ - (To)[yyi] = (From)[yyi]; \ - } \ - while (YYID (0)) -# endif -# endif +# define YYCOPY_NEEDED 1 /* Relocate STACK from its old location to the new one. The local variables YYSIZE and YYSTACKSIZE give the old and new number of elements in the stack, and YYPTR gives the new location of the stack. Advance YYPTR to a properly aligned location for the next stack. */ -# define YYSTACK_RELOCATE(Stack) \ - do \ - { \ - YYSIZE_T yynewbytes; \ - YYCOPY (&yyptr->Stack, Stack, yysize); \ - Stack = &yyptr->Stack; \ - yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \ - yyptr += yynewbytes / sizeof (*yyptr); \ - } \ - while (YYID (0)) +# define YYSTACK_RELOCATE(Stack_alloc, Stack) \ + do \ + { \ + YYSIZE_T yynewbytes; \ + YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \ + Stack = &yyptr->Stack_alloc; \ + yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \ + yyptr += yynewbytes / sizeof (*yyptr); \ + } \ + while (0) #endif +#if defined YYCOPY_NEEDED && YYCOPY_NEEDED +/* Copy COUNT objects from SRC to DST. The source and destination do + not overlap. */ +# ifndef YYCOPY +# if defined __GNUC__ && 1 < __GNUC__ +# define YYCOPY(Dst, Src, Count) \ + __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src))) +# else +# define YYCOPY(Dst, Src, Count) \ + do \ + { \ + YYSIZE_T yyi; \ + for (yyi = 0; yyi < (Count); yyi++) \ + (Dst)[yyi] = (Src)[yyi]; \ + } \ + while (0) +# endif +# endif +#endif /* !YYCOPY_NEEDED */ + /* YYFINAL -- State number of the termination state. */ #define YYFINAL ]b4_final_state_number[ /* YYLAST -- Last index in YYTABLE. */ @@ -437,44 +585,30 @@ union yyalloc #define YYNNTS ]b4_nterms_number[ /* YYNRULES -- Number of rules. */ #define YYNRULES ]b4_rules_number[ -/* YYNRULES -- Number of states. */ +/* YYNSTATES -- Number of states. */ #define YYNSTATES ]b4_states_number[ -/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX. */ +/* YYTRANSLATE[YYX] -- Symbol number corresponding to YYX as returned + by yylex, with out-of-bounds checking. */ #define YYUNDEFTOK ]b4_undef_token_number[ #define YYMAXUTOK ]b4_user_token_number_max[ -#define YYTRANSLATE(YYX) \ +#define YYTRANSLATE(YYX) \ ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) -/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ +/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM + as returned by yylex, without out-of-bounds checking. */ static const ]b4_int_type_for([b4_translate])[ yytranslate[] = { ]b4_translate[ }; -#if YYDEBUG -/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in - YYRHS. */ -static const ]b4_int_type_for([b4_prhs])[ yyprhs[] = -{ - ]b4_prhs[ -}; - -/* YYRHS -- A `-1'-separated list of the rules' RHS. */ -static const ]b4_int_type_for([b4_rhs])[ yyrhs[] = -{ - ]b4_rhs[ -}; - -/* YYRLINE[YYN] -- source line where rule number YYN was defined. */ -static const ]b4_int_type_for([b4_rline])[ yyrline[] = -{ - ]b4_rline[ -}; +#if ]b4_api_PREFIX[DEBUG +]b4_integral_parser_table_define([rline], [b4_rline], + [[YYRLINE[YYN] -- Source line where rule number YYN was defined.]])[ #endif -#if YYDEBUG || YYERROR_VERBOSE || YYTOKEN_TABLE +#if ]b4_api_PREFIX[DEBUG || YYERROR_VERBOSE || ]b4_token_table_flag[ /* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. First, the terminals, then, starting at YYNTOKENS, nonterminals. */ static const char *const yytname[] = @@ -484,201 +618,102 @@ static const char *const yytname[] = #endif # ifdef YYPRINT -/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to - token YYLEX-NUM. */ +/* YYTOKNUM[NUM] -- (External) token number corresponding to the + (internal) symbol number NUM (which must be that of a token). */ static const ]b4_int_type_for([b4_toknum])[ yytoknum[] = { ]b4_toknum[ }; # endif -/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ -static const ]b4_int_type_for([b4_r1])[ yyr1[] = -{ - ]b4_r1[ -}; - -/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ -static const ]b4_int_type_for([b4_r2])[ yyr2[] = -{ - ]b4_r2[ -}; - -/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state - STATE-NUM 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[ -}; - -/* YYDEFGOTO[NTERM-NUM]. */ -static const ]b4_int_type_for([b4_defgoto])[ yydefgoto[] = -{ - ]b4_defgoto[ -}; - -/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing - STATE-NUM. */ #define YYPACT_NINF ]b4_pact_ninf[ -static const ]b4_int_type_for([b4_pact])[ yypact[] = -{ - ]b4_pact[ -}; -/* YYPGOTO[NTERM-NUM]. */ -static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = -{ - ]b4_pgoto[ -}; +#define yypact_value_is_default(Yystate) \ + ]b4_table_value_equals([[pact]], [[Yystate]], [b4_pact_ninf])[ -/* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If - positive, shift that token. If negative, reduce the rule which - number is the opposite. If zero, do what YYDEFACT says. - If YYTABLE_NINF, syntax error. */ #define YYTABLE_NINF ]b4_table_ninf[ -static const ]b4_int_type_for([b4_table])[ yytable[] = -{ - ]b4_table[ -}; -static const ]b4_int_type_for([b4_check])[ yycheck[] = -{ - ]b4_check[ -}; +#define yytable_value_is_error(Yytable_value) \ + ]b4_table_value_equals([[table]], [[Yytable_value]], [b4_table_ninf])[ -/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing - symbol of state STATE-NUM. */ -static const ]b4_int_type_for([b4_stos])[ yystos[] = -{ - ]b4_stos[ -}; - -#define yyerrok (yyerrstatus = 0) -#define yyclearin (yychar = YYEMPTY) -#define YYEMPTY (-2) -#define YYEOF 0 - -#define YYACCEPT goto yyacceptlab -#define YYABORT goto yyabortlab -#define YYERROR goto yyerrorlab +]b4_parser_tables_define[ +#define yyerrok (yyerrstatus = 0) +#define yyclearin (yychar = YYEMPTY) +#define YYEMPTY (-2) +#define YYEOF 0 -/* Like YYERROR except do call yyerror. This remains here temporarily - to ease the transition to the new meaning of YYERROR, for GCC. - Once GCC version 2 has supplanted version 1, this can go. */ +#define YYACCEPT goto yyacceptlab +#define YYABORT goto yyabortlab +#define YYERROR goto yyerrorlab -#define YYFAIL goto yyerrlab #define YYRECOVERING() (!!yyerrstatus) -#define YYBACKUP(Token, Value) \ -do \ - if (yychar == YYEMPTY && yylen == 1) \ - { \ - yychar = (Token); \ - yylval = (Value); \ - yytoken = YYTRANSLATE (yychar); \ - YYPOPSTACK (1); \ - goto yybackup; \ - } \ - else \ - { \ +#define YYBACKUP(Token, Value) \ +do \ + if (yychar == YYEMPTY) \ + { \ + yychar = (Token); \ + yylval = (Value); \ + YYPOPSTACK (yylen); \ + yystate = *yyssp; \]b4_lac_if([[ + YY_LAC_DISCARD ("YYBACKUP"); \]])[ + goto yybackup; \ + } \ + else \ + { \ yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \ - YYERROR; \ - } \ -while (YYID (0)) - - -#define YYTERROR 1 -#define YYERRCODE 256 - + YYERROR; \ + } \ +while (0) -/* 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). */ +/* Error token number */ +#define YYTERROR 1 +#define YYERRCODE 256 +]b4_locations_if([[ +]b4_yylloc_default_define[ #define YYRHSLOC(Rhs, K) ((Rhs)[K]) -#ifndef YYLLOC_DEFAULT -# define YYLLOC_DEFAULT(Current, Rhs, N) \ - do \ - if (YYID (N)) \ - { \ - (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ - (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ - (Current).last_line = YYRHSLOC (Rhs, N).last_line; \ - (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ - } \ - else \ - { \ - (Current).first_line = (Current).last_line = \ - YYRHSLOC (Rhs, 0).last_line; \ - (Current).first_column = (Current).last_column = \ - YYRHSLOC (Rhs, 0).last_column; \ - } \ - while (YYID (0)) -#endif - - -/* YY_LOCATION_PRINT -- Print the location on the stream. - This macro was not mandated originally: define only if we know - we won't break user code: when these are the locations we know. */ - -#ifndef YY_LOCATION_PRINT -# if YYLTYPE_IS_TRIVIAL -# define YY_LOCATION_PRINT(File, Loc) \ - fprintf (File, "%d.%d-%d.%d", \ - (Loc).first_line, (Loc).first_column, \ - (Loc).last_line, (Loc).last_column) -# else -# define YY_LOCATION_PRINT(File, Loc) ((void) 0) -# endif -#endif - - -/* YYLEX -- calling `yylex' with the right arguments. */ - -#ifdef YYLEX_PARAM -# define YYLEX yylex (]b4_pure_if([&yylval[]b4_locations_if([, &yylloc]), ])[YYLEX_PARAM) -#else -# define YYLEX ]b4_c_function_call([yylex], [int], b4_lex_param)[ -#endif +]])[ /* Enable debugging if requested. */ -#if YYDEBUG +#if ]b4_api_PREFIX[DEBUG # ifndef YYFPRINTF # include /* INFRINGES ON USER NAME SPACE */ # define YYFPRINTF fprintf # endif -# define YYDPRINTF(Args) \ -do { \ - if (yydebug) \ - YYFPRINTF Args; \ -} while (YYID (0)) - -# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ -do { \ - if (yydebug) \ - { \ - YYFPRINTF (stderr, "%s ", Title); \ - yy_symbol_print (stderr, \ - Type, Value]b4_locations_if([, Location])[]b4_user_args[); \ - YYFPRINTF (stderr, "\n"); \ - } \ -} while (YYID (0)) - -]b4_yy_symbol_print_generate([b4_c_function_def])[ +# define YYDPRINTF(Args) \ +do { \ + if (yydebug) \ + YYFPRINTF Args; \ +} while (0) + +]b4_yy_location_print_define[ + +# define YY_SYMBOL_PRINT(Title, Type, Value, Location) \ +do { \ + if (yydebug) \ + { \ + YYFPRINTF (stderr, "%s ", Title); \ + yy_symbol_print (stderr, \ + Type, Value]b4_locations_if([, Location])[]b4_user_args[); \ + YYFPRINTF (stderr, "\n"); \ + } \ +} while (0) + +]b4_yy_symbol_print_define[ /*------------------------------------------------------------------. | yy_stack_print -- Print the state stack from its BOTTOM up to its | | TOP (included). | `------------------------------------------------------------------*/ -]b4_c_function_def([yy_stack_print], [static void], - [[yytype_int16 *yybottom], [yybottom]], - [[yytype_int16 *yytop], [yytop]])[ +]b4_function_define([yy_stack_print], [static void], + [[yytype_int16 *yybottom], [yybottom]], + [[yytype_int16 *yytop], [yytop]])[ { YYFPRINTF (stderr, "Stack now"); for (; yybottom <= yytop; yybottom++) @@ -689,59 +724,61 @@ do { \ YYFPRINTF (stderr, "\n"); } -# define YY_STACK_PRINT(Bottom, Top) \ -do { \ - if (yydebug) \ - yy_stack_print ((Bottom), (Top)); \ -} while (YYID (0)) +# define YY_STACK_PRINT(Bottom, Top) \ +do { \ + if (yydebug) \ + yy_stack_print ((Bottom), (Top)); \ +} while (0) /*------------------------------------------------. | Report that the YYRULE is going to be reduced. | `------------------------------------------------*/ -]b4_c_function_def([yy_reduce_print], [static void], - [[YYSTYPE *yyvsp], [yyvsp]], +]b4_function_define([yy_reduce_print], [static void], + [[yytype_int16 *yyssp], [yyssp]], + [[YYSTYPE *yyvsp], [yyvsp]], b4_locations_if([[[YYLTYPE *yylsp], [yylsp]], - ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [, - ])b4_parse_param)[ + ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [, + b4_parse_param]))[ { + unsigned long int yylno = yyrline[yyrule]; int yynrhs = yyr2[yyrule]; int yyi; - unsigned long int yylno = yyrline[yyrule]; YYFPRINTF (stderr, "Reducing stack by rule %d (line %lu):\n", - yyrule - 1, yylno); + yyrule - 1, yylno); /* 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[); + yy_symbol_print (stderr, + yystos[yyssp[yyi + 1 - yynrhs]], + &]b4_rhs_value(yynrhs, yyi + 1)[ + ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl + b4_user_args[); YYFPRINTF (stderr, "\n"); } } -# define YY_REDUCE_PRINT(Rule) \ -do { \ - if (yydebug) \ - yy_reduce_print (yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \ -} while (YYID (0)) +# define YY_REDUCE_PRINT(Rule) \ +do { \ + if (yydebug) \ + yy_reduce_print (yyssp, yyvsp, ]b4_locations_if([yylsp, ])[Rule]b4_user_args[); \ +} while (0) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ int yydebug; -#else /* !YYDEBUG */ +#else /* !]b4_api_PREFIX[DEBUG */ # define YYDPRINTF(Args) # define YY_SYMBOL_PRINT(Title, Type, Value, Location) # define YY_STACK_PRINT(Bottom, Top) # define YY_REDUCE_PRINT(Rule) -#endif /* !YYDEBUG */ +#endif /* !]b4_api_PREFIX[DEBUG */ /* YYINITDEPTH -- initial size of the parser's stacks. */ -#ifndef YYINITDEPTH +#ifndef YYINITDEPTH # define YYINITDEPTH ]b4_stack_depth_init[ #endif @@ -754,9 +791,244 @@ int yydebug; #ifndef YYMAXDEPTH # define YYMAXDEPTH ]b4_stack_depth_max[ +#endif]b4_lac_if([[ + +/* Given a state stack such that *YYBOTTOM is its bottom, such that + *YYTOP is either its top or is YYTOP_EMPTY to indicate an empty + stack, and such that *YYCAPACITY is the maximum number of elements it + can hold without a reallocation, make sure there is enough room to + store YYADD more elements. If not, allocate a new stack using + YYSTACK_ALLOC, copy the existing elements, and adjust *YYBOTTOM, + *YYTOP, and *YYCAPACITY to reflect the new capacity and memory + location. If *YYBOTTOM != YYBOTTOM_NO_FREE, then free the old stack + using YYSTACK_FREE. Return 0 if successful or if no reallocation is + required. Return 1 if memory is exhausted. */ +static int +yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd, +#if ]b4_api_PREFIX[DEBUG + char const *yydebug_prefix, + char const *yydebug_suffix, +#endif + yytype_int16 **yybottom, + yytype_int16 *yybottom_no_free, + yytype_int16 **yytop, yytype_int16 *yytop_empty) +{ + YYSIZE_T yysize_old = + *yytop == yytop_empty ? 0 : *yytop - *yybottom + 1; + YYSIZE_T yysize_new = yysize_old + yyadd; + if (*yycapacity < yysize_new) + { + YYSIZE_T yyalloc = 2 * yysize_new; + yytype_int16 *yybottom_new; + /* Use YYMAXDEPTH for maximum stack size given that the stack + should never need to grow larger than the main state stack + needs to grow without LAC. */ + if (YYMAXDEPTH < yysize_new) + { + YYDPRINTF ((stderr, "%smax size exceeded%s", yydebug_prefix, + yydebug_suffix)); + return 1; + } + if (YYMAXDEPTH < yyalloc) + yyalloc = YYMAXDEPTH; + yybottom_new = + (yytype_int16*) YYSTACK_ALLOC (yyalloc * sizeof *yybottom_new); + if (!yybottom_new) + { + YYDPRINTF ((stderr, "%srealloc failed%s", yydebug_prefix, + yydebug_suffix)); + return 1; + } + if (*yytop != yytop_empty) + { + YYCOPY (yybottom_new, *yybottom, yysize_old); + *yytop = yybottom_new + (yysize_old - 1); + } + if (*yybottom != yybottom_no_free) + YYSTACK_FREE (*yybottom); + *yybottom = yybottom_new; + *yycapacity = yyalloc;]m4_if(b4_percent_define_get([[parse.lac.memory-trace]]), + [full], [[ + YYDPRINTF ((stderr, "%srealloc to %lu%s", yydebug_prefix, + (unsigned long int) yyalloc, yydebug_suffix));]])[ + } + return 0; +} + +/* Establish the initial context for the current lookahead if no initial + context is currently established. + + We define a context as a snapshot of the parser stacks. We define + the initial context for a lookahead as the context in which the + parser initially examines that lookahead in order to select a + syntactic action. Thus, if the lookahead eventually proves + syntactically unacceptable (possibly in a later context reached via a + series of reductions), the initial context can be used to determine + the exact set of tokens that would be syntactically acceptable in the + lookahead's place. Moreover, it is the context after which any + further semantic actions would be erroneous because they would be + determined by a syntactically unacceptable token. + + YY_LAC_ESTABLISH should be invoked when a reduction is about to be + performed in an inconsistent state (which, for the purposes of LAC, + includes consistent states that don't know they're consistent because + their default reductions have been disabled). Iff there is a + lookahead token, it should also be invoked before reporting a syntax + error. This latter case is for the sake of the debugging output. + + For parse.lac=full, the implementation of YY_LAC_ESTABLISH is as + follows. If no initial context is currently established for the + current lookahead, then check if that lookahead can eventually be + shifted if syntactic actions continue from the current context. + Report a syntax error if it cannot. */ +#define YY_LAC_ESTABLISH \ +do { \ + if (!yy_lac_established) \ + { \ + YYDPRINTF ((stderr, \ + "LAC: initial context established for %s\n", \ + yytname[yytoken])); \ + yy_lac_established = 1; \ + { \ + int yy_lac_status = \ + yy_lac (yyesa, &yyes, &yyes_capacity, yyssp, yytoken); \ + if (yy_lac_status == 2) \ + goto yyexhaustedlab; \ + if (yy_lac_status == 1) \ + goto yyerrlab; \ + } \ + } \ +} while (0) + +/* Discard any previous initial lookahead context because of Event, + which may be a lookahead change or an invalidation of the currently + established initial context for the current lookahead. + + The most common example of a lookahead change is a shift. An example + of both cases is syntax error recovery. That is, a syntax error + occurs when the lookahead is syntactically erroneous for the + currently established initial context, so error recovery manipulates + the parser stacks to try to find a new initial context in which the + current lookahead is syntactically acceptable. If it fails to find + such a context, it discards the lookahead. */ +#if ]b4_api_PREFIX[DEBUG +# define YY_LAC_DISCARD(Event) \ +do { \ + if (yy_lac_established) \ + { \ + if (yydebug) \ + YYFPRINTF (stderr, "LAC: initial context discarded due to " \ + Event "\n"); \ + yy_lac_established = 0; \ + } \ +} while (0) +#else +# define YY_LAC_DISCARD(Event) yy_lac_established = 0 +#endif + +/* Given the stack whose top is *YYSSP, return 0 iff YYTOKEN can + eventually (after perhaps some reductions) be shifted, return 1 if + not, or return 2 if memory is exhausted. As preconditions and + postconditions: *YYES_CAPACITY is the allocated size of the array to + which *YYES points, and either *YYES = YYESA or *YYES points to an + array allocated with YYSTACK_ALLOC. yy_lac may overwrite the + contents of either array, alter *YYES and *YYES_CAPACITY, and free + any old *YYES other than YYESA. */ +static int +yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes, + YYSIZE_T *yyes_capacity, yytype_int16 *yyssp, int yytoken) +{ + yytype_int16 *yyes_prev = yyssp; + yytype_int16 *yyesp = yyes_prev; + YYDPRINTF ((stderr, "LAC: checking lookahead %s:", yytname[yytoken])); + if (yytoken == YYUNDEFTOK) + { + YYDPRINTF ((stderr, " Always Err\n")); + return 1; + } + while (1) + { + int yyrule = yypact[*yyesp]; + if (yypact_value_is_default (yyrule) + || (yyrule += yytoken) < 0 || YYLAST < yyrule + || yycheck[yyrule] != yytoken) + { + yyrule = yydefact[*yyesp]; + if (yyrule == 0) + { + YYDPRINTF ((stderr, " Err\n")); + return 1; + } + } + else + { + yyrule = yytable[yyrule]; + if (yytable_value_is_error (yyrule)) + { + YYDPRINTF ((stderr, " Err\n")); + return 1; + } + if (0 < yyrule) + { + YYDPRINTF ((stderr, " S%d\n", yyrule)); + return 0; + } + yyrule = -yyrule; + } + { + YYSIZE_T yylen = yyr2[yyrule]; + YYDPRINTF ((stderr, " R%d", yyrule - 1)); + if (yyesp != yyes_prev) + { + YYSIZE_T yysize = yyesp - *yyes + 1; + if (yylen < yysize) + { + yyesp -= yylen; + yylen = 0; + } + else + { + yylen -= yysize; + yyesp = yyes_prev; + } + } + if (yylen) + yyesp = yyes_prev -= yylen; + } + { + int yystate; + { + int yylhs = yyr1[yyrule] - YYNTOKENS; + yystate = yypgoto[yylhs] + *yyesp; + if (yystate < 0 || YYLAST < yystate + || yycheck[yystate] != *yyesp) + yystate = yydefgoto[yylhs]; + else + yystate = yytable[yystate]; + } + if (yyesp == yyes_prev) + { + yyesp = *yyes; + *yyesp = yystate; + } + else + { + if (yy_lac_stack_realloc (yyes_capacity, 1, +#if ]b4_api_PREFIX[DEBUG + " (", ")", #endif + yyes, yyesa, &yyesp, yyes_prev)) + { + YYDPRINTF ((stderr, "\n")); + return 2; + } + *++yyesp = yystate; + } + YYDPRINTF ((stderr, " G%d", yystate)); + } + } +}]])[ - #if YYERROR_VERBOSE @@ -765,7 +1037,7 @@ int yydebug; # define yystrlen strlen # else /* Return the length of YYSTR. */ -]b4_c_function_def([yystrlen], [static YYSIZE_T], +]b4_function_define([yystrlen], [static YYSIZE_T], [[const char *yystr], [yystr]])[ { YYSIZE_T yylen; @@ -782,7 +1054,7 @@ int yydebug; # else /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in YYDEST. */ -]b4_c_function_def([yystpcpy], [static char *], +]b4_function_define([yystpcpy], [static char *], [[char *yydest], [yydest]], [[const char *yysrc], [yysrc]])[ { char *yyd = yydest; @@ -813,27 +1085,27 @@ yytnamerr (char *yyres, const char *yystr) char const *yyp = yystr; for (;;) - switch (*++yyp) - { - case '\'': - case ',': - goto do_not_strip_quotes; - - case '\\': - if (*++yyp != '\\') - goto do_not_strip_quotes; - /* Fall through. */ - default: - if (yyres) - yyres[yyn] = *yyp; - yyn++; - break; - - case '"': - if (yyres) - yyres[yyn] = '\0'; - return yyn; - } + switch (*++yyp) + { + case '\'': + case ',': + goto do_not_strip_quotes; + + case '\\': + if (*++yyp != '\\') + goto do_not_strip_quotes; + /* Fall through. */ + default: + if (yyres) + yyres[yyn] = *yyp; + yyn++; + break; + + case '"': + if (yyres) + yyres[yyn] = '\0'; + return yyn; + } do_not_strip_quotes: ; } @@ -844,170 +1116,304 @@ yytnamerr (char *yyres, const char *yystr) } # endif -/* Copy into YYRESULT an error message about the unexpected token - YYCHAR while in state YYSTATE. Return the number of bytes copied, - including the terminating null byte. If YYRESULT is null, do not - copy anything; just return the number of bytes that would be - copied. As a special case, return 0 if an ordinary "syntax error" - message will do. Return YYSIZE_MAXIMUM if overflow occurs during - size calculation. */ -static YYSIZE_T -yysyntax_error (char *yyresult, int yystate, int yychar) +/* Copy into *YYMSG, which is of size *YYMSG_ALLOC, an error message + about the unexpected token YYTOKEN for the state stack whose top is + YYSSP.]b4_lac_if([[ In order to see if a particular token T is a + valid looakhead, invoke yy_lac (YYESA, YYES, YYES_CAPACITY, YYSSP, T).]])[ + + Return 0 if *YYMSG was successfully written. Return 1 if *YYMSG is + not large enough to hold the message. In that case, also set + *YYMSG_ALLOC to the required number of bytes. Return 2 if the + required number of bytes is too large to store]b4_lac_if([[ or if + yy_lac returned 2]])[. */ +static int +yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg, + ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes, + YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken) { - int yyn = yypact[yystate]; + YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]); + YYSIZE_T yysize = yysize0; + 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.]b4_lac_if([[ + In the first two cases, it might appear that the current syntax + error should have been detected in the previous state when yy_lac + was invoked. However, at that time, there might have been a + different syntax error that discarded a different initial context + during error recovery, leaving behind the current lookahead.]], [[ + - Of course, the expected token list depends on states to have + correct lookahead information, and it depends on the parser not + to perform extra reductions after fetching a lookahead from the + scanner and before detecting a syntax error. Thus, state merging + (from LALR or IELR) and default reductions corrupt the expected + token list. However, the list is correct for canonical LR with + one exception: it will still contain any token that will not be + accepted due to an error action in a later state.]])[ + */ + if (yytoken != YYEMPTY) + { + int yyn = yypact[*yyssp];]b4_lac_if([[ + YYDPRINTF ((stderr, "Constructing syntax error message\n"));]])[ + yyarg[yycount++] = yytname[yytoken]; + if (!yypact_value_is_default (yyn)) + {]b4_lac_if([], [[ + /* Start YYX at -YYN if negative to avoid negative indexes in + YYCHECK. In other words, skip the first -YYN actions for + this state because they are default actions. */ + int yyxbegin = yyn < 0 ? -yyn : 0; + /* Stay within bounds of both yycheck and yytname. */ + int yychecklim = YYLAST - yyn + 1; + int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;]])[ + int yyx;]b4_lac_if([[ + + for (yyx = 0; yyx < YYNTOKENS; ++yyx) + if (yyx != YYTERROR && yyx != YYUNDEFTOK) + { + { + int yy_lac_status = yy_lac (yyesa, yyes, yyes_capacity, + yyssp, yyx); + if (yy_lac_status == 2) + return 2; + if (yy_lac_status == 1) + continue; + }]], [[ + + for (yyx = yyxbegin; yyx < yyxend; ++yyx) + if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR + && !yytable_value_is_error (yytable[yyx + yyn])) + {]])[ + if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) + { + yycount = 1; + yysize = yysize0; + break; + } + yyarg[yycount++] = yytname[yyx]; + { + YYSIZE_T yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]); + if (! (yysize <= yysize1 + && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) + return 2; + yysize = yysize1; + } + } + }]b4_lac_if([[ +# if ]b4_api_PREFIX[DEBUG + else if (yydebug) + YYFPRINTF (stderr, "No expected tokens.\n"); +# endif]])[ + } - if (! (YYPACT_NINF < yyn && yyn <= YYLAST)) - return 0; - else + switch (yycount) { - int yytype = YYTRANSLATE (yychar); - YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]); - YYSIZE_T yysize = yysize0; - YYSIZE_T yysize1; - int yysize_overflow = 0; - enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; - char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; - int yyx; - -# if 0 - /* This is so xgettext sees the translatable formats that are - constructed on the fly. */ - YY_("syntax error, unexpected %s"); - YY_("syntax error, unexpected %s, expecting %s"); - YY_("syntax error, unexpected %s, expecting %s or %s"); - YY_("syntax error, unexpected %s, expecting %s or %s or %s"); - YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"); -# endif - char *yyfmt; - char const *yyf; - static char const yyunexpected[] = "syntax error, unexpected %s"; - static char const yyexpecting[] = ", expecting %s"; - static char const yyor[] = " or %s"; - char yyformat[sizeof yyunexpected - + sizeof yyexpecting - 1 - + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2) - * (sizeof yyor - 1))]; - char const *yyprefix = yyexpecting; - - /* Start YYX at -YYN if negative to avoid negative indexes in - YYCHECK. */ - int yyxbegin = yyn < 0 ? -yyn : 0; - - /* Stay within bounds of both yycheck and yytname. */ - int yychecklim = YYLAST - yyn + 1; - int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yycount = 1; - - yyarg[0] = yytname[yytype]; - yyfmt = yystpcpy (yyformat, yyunexpected); - - for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) - { - if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) - { - yycount = 1; - yysize = yysize0; - yyformat[sizeof yyunexpected - 1] = '\0'; - break; - } - yyarg[yycount++] = yytname[yyx]; - yysize1 = yysize + yytnamerr (0, yytname[yyx]); - yysize_overflow |= (yysize1 < yysize); - yysize = yysize1; - yyfmt = yystpcpy (yyfmt, yyprefix); - yyprefix = yyor; - } - - yyf = YY_(yyformat); - yysize1 = yysize + yystrlen (yyf); - yysize_overflow |= (yysize1 < yysize); - yysize = yysize1; - - if (yysize_overflow) - return YYSIZE_MAXIMUM; - - if (yyresult) - { - /* Avoid sprintf, as that infringes on the user's name space. - Don't have undefined behavior even if the translation - produced a string with the wrong number of "%s"s. */ - char *yyp = yyresult; - int yyi = 0; - while ((*yyp = *yyf) != '\0') - { - if (*yyp == '%' && yyf[1] == 's' && yyi < yycount) - { - yyp += yytnamerr (yyp, yyarg[yyi++]); - yyf += 2; - } - else - { - yyp++; - yyf++; - } - } - } - return yysize; +# define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(0, YY_("syntax error")); + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +# undef YYCASE_ } + + { + YYSIZE_T yysize1 = yysize + yystrlen (yyformat); + if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) + return 2; + yysize = yysize1; + } + + if (*yymsg_alloc < yysize) + { + *yymsg_alloc = 2 * yysize; + if (! (yysize <= *yymsg_alloc + && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) + *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; + return 1; + } + + /* Avoid sprintf, as that infringes on the user's name space. + Don't have undefined behavior even if the translation + produced a string with the wrong number of "%s"s. */ + { + char *yyp = *yymsg; + int yyi = 0; + while ((*yyp = *yyformat) != '\0') + if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) + { + yyp += yytnamerr (yyp, yyarg[yyi++]); + yyformat += 2; + } + else + { + yyp++; + yyformat++; + } + } + return 0; } #endif /* YYERROR_VERBOSE */ - -]b4_yydestruct_generate([b4_c_function_def])[ - +]b4_yydestruct_define[ -/* Prevent warnings from -Wmissing-prototypes. */ +]b4_pure_if([], [ -#ifdef YYPARSE_PARAM -]b4_c_function_decl([yyparse], [int], - [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ -#else /* ! YYPARSE_PARAM */ -]b4_c_function_decl([yyparse], [int], b4_parse_param)[ -#endif /* ! YYPARSE_PARAM */ +b4_declare_scanner_communication_variables])[]b4_push_if([[ +struct yypstate + {]b4_declare_parser_state_variables[ + /* Used to determine if this is the first time this instance has + been used. */ + int yynew; + };]b4_pure_if([], [[ -]m4_divert_push([KILL])# ======================== M4 code. -# b4_declare_parser_variables -# --------------------------- -# Declare the variables that are global, or local to YYPARSE if -# pure-parser. -m4_define([b4_declare_parser_variables], -[/* The lookahead symbol. */ -int yychar; +static char yypstate_allocated = 0;]])b4_pull_if([ -/* The semantic value of the lookahead symbol. */ -YYSTYPE yylval; +b4_function_define([[yyparse]], [[int]], b4_parse_param)[ +{ + return yypull_parse (YY_NULL]m4_ifset([b4_parse_param], + [[, ]b4_args(b4_parse_param)])[); +} -/* Number of syntax errors so far. */ -int yynerrs;b4_locations_if([ -/* Location data for the lookahead symbol. */ -YYLTYPE yylloc;]) -]) -m4_divert_pop([KILL])dnl# ====================== End of M4 code. +]b4_function_define([[yypull_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))[ +{ + int yystatus; + yypstate *yyps_local;]b4_pure_if([[ + int yychar; + YYSTYPE yylval;]b4_locations_if([[ + static YYLTYPE yyloc_default][]b4_yyloc_default[; + YYLTYPE yylloc = yyloc_default;]])])[ + if (yyps) + yyps_local = yyps; + else + { + yyps_local = yypstate_new (); + if (!yyps_local) + {]b4_pure_if([[ + yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[ + if (!yypstate_allocated) + yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[ + return 2; + } + } + do { + yychar = ]b4_lex[; + yystatus = + yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_args(b4_parse_param)])[); + } while (yystatus == YYPUSH_MORE); + if (!yyps) + yypstate_delete (yyps_local); + return yystatus; +}]])[ + +/* Initialize the parser data structure. */ +]b4_function_define([[yypstate_new]], [[yypstate *]])[ +{ + yypstate *yyps;]b4_pure_if([], [[ + if (yypstate_allocated) + return YY_NULL;]])[ + yyps = (yypstate *) malloc (sizeof *yyps); + if (!yyps) + return YY_NULL; + yyps->yynew = 1;]b4_pure_if([], [[ + yypstate_allocated = 1;]])[ + return yyps; +} -b4_pure_if([], - [b4_declare_parser_variables]) +]b4_function_define([[yypstate_delete]], [[void]], + [[[yypstate *yyps]], [[yyps]]])[ +{ +#ifndef yyoverflow + /* If the stack was reallocated but the parse did not complete, then the + stack still needs to be freed. */ + if (!yyps->yynew && yyps->yyss != yyps->yyssa) + YYSTACK_FREE (yyps->yyss); +#endif]b4_lac_if([[ + if (!yyps->yynew && yyps->yyes != yyps->yyesa) + YYSTACK_FREE (yyps->yyes);]])[ + free (yyps);]b4_pure_if([], [[ + yypstate_allocated = 0;]])[ +} +]b4_pure_if([[ +#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[ +#define yystate yyps->yystate +#define yyerrstatus yyps->yyerrstatus +#define yyssa yyps->yyssa +#define yyss yyps->yyss +#define yyssp yyps->yyssp +#define yyvsa yyps->yyvsa +#define yyvs yyps->yyvs +#define yyvsp yyps->yyvsp]b4_locations_if([[ +#define yylsa yyps->yylsa +#define yyls yyps->yyls +#define yylsp yyps->yylsp +#define yyerror_range yyps->yyerror_range]])[ +#define yystacksize yyps->yystacksize]b4_lac_if([[ +#define yyesa yyps->yyesa +#define yyes yyps->yyes +#define yyes_capacity yyps->yyes_capacity]])[ + + +/*---------------. +| yypush_parse. | +`---------------*/ + +]b4_function_define([[yypush_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]b4_pure_if([, + [[[int yypushed_char]], [[yypushed_char]]], + [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, + [[[YYLTYPE *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param]))], [[ /*----------. | yyparse. | `----------*/ -#ifdef YYPARSE_PARAM -b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]]) -#else /* ! YYPARSE_PARAM */ -b4_c_function_def([yyparse], [int], b4_parse_param) -#endif -{[ - ]b4_pure_if([b4_declare_parser_variables])[ - int yystate; +]b4_function_define([yyparse], [int], b4_parse_param)])[ +{]b4_pure_if([b4_declare_scanner_communication_variables +])b4_push_if([b4_pure_if([], [[ + int yypushed_char = yychar; + YYSTYPE yypushed_val = yylval;]b4_locations_if([[ + YYLTYPE yypushed_loc = yylloc;]]) +])], + [b4_declare_parser_state_variables +])b4_lac_if([[ + int yy_lac_established = 0;]])[ int yyn; int yyresult; - /* Number of tokens to shift before error messages enabled. */ - int yyerrstatus; /* Lookahead token as an internal (translated) token number. */ int yytoken = 0; + /* The variables used to return semantic value and location from the + action routines. */ + YYSTYPE yyval;]b4_locations_if([[ + YYLTYPE yyloc;]])[ + #if YYERROR_VERBOSE /* Buffer for error messages, and its allocated size. */ char yymsgbuf[128]; @@ -1015,76 +1421,43 @@ b4_c_function_def([yyparse], [int], b4_parse_param) YYSIZE_T yymsg_alloc = sizeof yymsgbuf; #endif - /* Three stacks and their tools: - `yyss': related to states, - `yyvs': related to semantic values, - `yyls': related to locations. - - Refer to the stacks thru separate pointers, to allow yyoverflow - to reallocate them elsewhere. */ - - /* The state stack. */ - yytype_int16 yyssa[YYINITDEPTH]; - yytype_int16 *yyss = yyssa; - yytype_int16 *yyssp; - - /* The semantic value stack. */ - YYSTYPE yyvsa[YYINITDEPTH]; - YYSTYPE *yyvs = yyvsa; - YYSTYPE *yyvsp; - -]b4_locations_if( -[[ /* The location stack. */ - YYLTYPE yylsa[YYINITDEPTH]; - YYLTYPE *yyls = yylsa; - YYLTYPE *yylsp; - /* The locations where the error started and ended. */ - YYLTYPE yyerror_range[2];]])[ - #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[) - YYSIZE_T yystacksize = YYINITDEPTH; - - /* The variables used to return semantic value and location from the - action routines. */ - YYSTYPE yyval; -]b4_locations_if([ YYLTYPE yyloc;])[ - /* The number of symbols on the RHS of the reduced rule. Keep to zero when no symbol should be popped. */ - int yylen = 0; + int yylen = 0;]b4_push_if([[ + + if (!yyps->yynew) + { + yyn = yypact[yystate]; + goto yyread_pushed_token; + }]])[ + + yyssp = yyss = yyssa; + yyvsp = yyvs = yyvsa;]b4_locations_if([[ + yylsp = yyls = yylsa;]])[ + yystacksize = YYINITDEPTH;]b4_lac_if([[ + + yyes = yyesa; + yyes_capacity = sizeof yyesa / sizeof *yyes; + if (YYMAXDEPTH < yyes_capacity) + yyes_capacity = YYMAXDEPTH;]])[ YYDPRINTF ((stderr, "Starting parse\n")); yystate = 0; yyerrstatus = 0; yynerrs = 0; - yychar = YYEMPTY; /* Cause a token to be read. */ - - /* Initialize stack pointers. - Waste one element of value and location stack - so that they stay on the same level as the state stack. - The wasted elements are never initialized. */ - - yyssp = yyss; - yyvsp = yyvs; -]b4_locations_if([[ yylsp = yyls; -#if YYLTYPE_IS_TRIVIAL - /* Initialize the default location before parsing starts. */ - 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], [m4_define([b4_at_dollar_used])yylloc])dnl -m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl - /* User initialization code. */ - b4_user_initial_action -m4_popdef([b4_dollar_dollar])dnl -m4_popdef([b4_at_dollar])])dnl + yychar = YYEMPTY; /* Cause a token to be read. */ +]m4_ifdef([b4_initial_action], [ +b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [], + [b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])])dnl +/* User initialization code. */ +b4_user_initial_action +b4_dollar_popdef[]dnl m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval; -]])dnl -m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; +]])])dnl +b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yylloc])[; ]])dnl [ goto yysetstate; @@ -1106,25 +1479,26 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; #ifdef yyoverflow { - /* Give user a chance to reallocate the stack. Use copies of - these so that the &'s don't force the real ones into - memory. */ - YYSTYPE *yyvs1 = yyvs; - yytype_int16 *yyss1 = yyss; -]b4_locations_if([ YYLTYPE *yyls1 = yyls;])[ - - /* Each stack pointer address is followed by the size of the - data in use in that stack, in bytes. This used to be a - conditional around just the two extra args, but that might - be undefined if yyoverflow is a macro. */ - yyoverflow (YY_("memory exhausted"), - &yyss1, yysize * sizeof (*yyssp), - &yyvs1, yysize * sizeof (*yyvsp), -]b4_locations_if([ &yyls1, yysize * sizeof (*yylsp),])[ - &yystacksize); -]b4_locations_if([ yyls = yyls1;])[ - yyss = yyss1; - yyvs = yyvs1; + /* Give user a chance to reallocate the stack. Use copies of + these so that the &'s don't force the real ones into + memory. */ + YYSTYPE *yyvs1 = yyvs; + yytype_int16 *yyss1 = yyss;]b4_locations_if([ + YYLTYPE *yyls1 = yyls;])[ + + /* Each stack pointer address is followed by the size of the + data in use in that stack, in bytes. This used to be a + conditional around just the two extra args, but that might + be undefined if yyoverflow is a macro. */ + yyoverflow (YY_("memory exhausted"), + &yyss1, yysize * sizeof (*yyssp), + &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([ + &yyls1, yysize * sizeof (*yylsp),])[ + &yystacksize); +]b4_locations_if([ + yyls = yyls1;])[ + yyss = yyss1; + yyvs = yyvs1; } #else /* no yyoverflow */ # ifndef YYSTACK_RELOCATE @@ -1132,36 +1506,36 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; # else /* Extend the stack our own way. */ if (YYMAXDEPTH <= yystacksize) - goto yyexhaustedlab; + goto yyexhaustedlab; yystacksize *= 2; if (YYMAXDEPTH < yystacksize) - yystacksize = YYMAXDEPTH; + yystacksize = YYMAXDEPTH; { - yytype_int16 *yyss1 = yyss; - union yyalloc *yyptr = - (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); - if (! yyptr) - goto yyexhaustedlab; - YYSTACK_RELOCATE (yyss); - YYSTACK_RELOCATE (yyvs); -]b4_locations_if([ YYSTACK_RELOCATE (yyls);])[ + yytype_int16 *yyss1 = yyss; + union yyalloc *yyptr = + (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); + if (! yyptr) + goto yyexhaustedlab; + YYSTACK_RELOCATE (yyss_alloc, yyss); + YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([ + YYSTACK_RELOCATE (yyls_alloc, yyls);])[ # undef YYSTACK_RELOCATE - if (yyss1 != yyssa) - YYSTACK_FREE (yyss1); + if (yyss1 != yyssa) + YYSTACK_FREE (yyss1); } # endif #endif /* no yyoverflow */ yyssp = yyss + yysize - 1; - yyvsp = yyvs + yysize - 1; -]b4_locations_if([ yylsp = yyls + yysize - 1;])[ + yyvsp = yyvs + yysize - 1;]b4_locations_if([ + yylsp = yyls + yysize - 1;])[ YYDPRINTF ((stderr, "Stack size increased to %lu\n", - (unsigned long int) yystacksize)); + (unsigned long int) yystacksize)); if (yyss + yystacksize - 1 <= yyssp) - YYABORT; + YYABORT; } YYDPRINTF ((stderr, "Entering state %d\n", yystate)); @@ -1181,16 +1555,35 @@ yybackup: /* First try to decide what to do without reference to lookahead token. */ yyn = yypact[yystate]; - if (yyn == YYPACT_NINF) + if (yypact_value_is_default (yyn)) goto yydefault; /* Not known => get a lookahead token if don't already have one. */ /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ if (yychar == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; + {]b4_push_if([[ + if (!yyps->yynew) + {]b4_use_push_for_pull_if([], [[ + YYDPRINTF ((stderr, "Return for a new token:\n"));]])[ + yyresult = YYPUSH_MORE; + goto yypushreturn; + } + yyps->yynew = 0;]b4_pure_if([], [[ + /* Restoring the pushed token is only necessary for the first + yypush_parse invocation since subsequent invocations don't overwrite + it before jumping to yyread_pushed_token. */ + yychar = yypushed_char; + yylval = yypushed_val;]b4_locations_if([[ + yylloc = yypushed_loc;]])])[ +yyread_pushed_token:]])[ + YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[ + yychar = yypushed_char; + if (yypushed_val) + yylval = *yypushed_val;]b4_locations_if([[ + if (yypushed_loc) + yylloc = *yypushed_loc;]])])], [[ + yychar = ]b4_lex[;]])[ } if (yychar <= YYEOF) @@ -1207,13 +1600,18 @@ yybackup: /* If the proper action on seeing token YYTOKEN is to reduce or to detect an error, take that action. */ yyn += yytoken; - if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) - goto yydefault; + if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)]b4_lac_if([[ + { + YY_LAC_ESTABLISH; + goto yydefault; + }]], [[ + goto yydefault;]])[ yyn = yytable[yyn]; if (yyn <= 0) { - if (yyn == 0 || yyn == YYTABLE_NINF) - goto yyerrlab; + if (yytable_value_is_error (yyn)) + goto yyerrlab;]b4_lac_if([[ + YY_LAC_ESTABLISH;]])[ yyn = -yyn; goto yyreduce; } @@ -1227,10 +1625,13 @@ yybackup: YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); /* Discard the shifted token. */ - yychar = YYEMPTY; + yychar = YYEMPTY;]b4_lac_if([[ + YY_LAC_DISCARD ("shift");]])[ yystate = yyn; + YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN *++yyvsp = yylval; + YY_IGNORE_MAYBE_UNINITIALIZED_END ]b4_locations_if([ *++yylsp = yylloc;])[ goto yynewstate; @@ -1265,20 +1666,41 @@ yyreduce: ]b4_locations_if( [[ /* Default location. */ YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);]])[ - YY_REDUCE_PRINT (yyn); + YY_REDUCE_PRINT (yyn);]b4_lac_if([[ + { + int yychar_backup = yychar; + switch (yyn) + { + ]b4_user_actions[ + default: break; + } + if (yychar_backup != yychar) + YY_LAC_DISCARD ("yychar change"); + }]], [[ switch (yyn) { ]b4_user_actions[ default: break; - } + }]])[ + /* User semantic actions sometimes alter yychar, and that requires + that yytoken be updated with the new translation. We take the + approach of translating immediately before every use of yytoken. + One alternative is translating here after every semantic action, + but that translation would be missed if the semantic action invokes + YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or + if it invokes YYBACKUP. In the case of YYABORT or YYACCEPT, an + incorrect destructor might then be invoked immediately. In the + case of YYERROR or YYBACKUP, subsequent parser actions might lead + to an incorrect destructor call or verbose syntax error message + before the lookahead is translated. */ YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc); YYPOPSTACK (yylen); yylen = 0; YY_STACK_PRINT (yyss, yyssp); - *++yyvsp = yyval; -]b4_locations_if([ *++yylsp = yyloc;])[ + *++yyvsp = yyval;]b4_locations_if([ + *++yylsp = yyloc;])[ /* Now `shift' the result of the reduction. Determine what state that goes to, based on the state we popped back to and the rule @@ -1295,10 +1717,14 @@ yyreduce: goto yynewstate; -/*------------------------------------. -| yyerrlab -- here on detecting error | -`------------------------------------*/ +/*--------------------------------------. +| yyerrlab -- here on detecting error. | +`--------------------------------------*/ yyerrlab: + /* Make sure we have latest lookahead translation. See comments at + user semantic actions for why this is necessary. */ + yytoken = yychar == YYEMPTY ? YYEMPTY : YYTRANSLATE (yychar); + /* If not already recovering from an error, report this error. */ if (!yyerrstatus) { @@ -1306,59 +1732,61 @@ yyerrlab: #if ! YYERROR_VERBOSE yyerror (]b4_yyerror_args[YY_("syntax error")); #else +# define YYSYNTAX_ERROR yysyntax_error (&yymsg_alloc, &yymsg, \]b4_lac_if([[ + yyesa, &yyes, &yyes_capacity, \]])[ + yyssp, yytoken) { - YYSIZE_T yysize = yysyntax_error (0, yystate, yychar); - if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM) - { - YYSIZE_T yyalloc = 2 * yysize; - if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM)) - yyalloc = YYSTACK_ALLOC_MAXIMUM; - if (yymsg != yymsgbuf) - YYSTACK_FREE (yymsg); - yymsg = (char *) YYSTACK_ALLOC (yyalloc); - if (yymsg) - yymsg_alloc = yyalloc; - else - { - yymsg = yymsgbuf; - yymsg_alloc = sizeof yymsgbuf; - } - } - - if (0 < yysize && yysize <= yymsg_alloc) - { - (void) yysyntax_error (yymsg, yystate, yychar); - yyerror (]b4_yyerror_args[yymsg); - } - else - { - yyerror (]b4_yyerror_args[YY_("syntax error")); - if (yysize != 0) - goto yyexhaustedlab; - } + char const *yymsgp = YY_("syntax error"); + int yysyntax_error_status;]b4_lac_if([[ + if (yychar != YYEMPTY) + YY_LAC_ESTABLISH;]])[ + yysyntax_error_status = YYSYNTAX_ERROR; + if (yysyntax_error_status == 0) + yymsgp = yymsg; + else if (yysyntax_error_status == 1) + { + if (yymsg != yymsgbuf) + YYSTACK_FREE (yymsg); + yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc); + if (!yymsg) + { + yymsg = yymsgbuf; + yymsg_alloc = sizeof yymsgbuf; + yysyntax_error_status = 2; + } + else + { + yysyntax_error_status = YYSYNTAX_ERROR; + yymsgp = yymsg; + } + } + yyerror (]b4_yyerror_args[yymsgp); + if (yysyntax_error_status == 2) + goto yyexhaustedlab; } +# undef YYSYNTAX_ERROR #endif } -]b4_locations_if([[ yyerror_range[0] = yylloc;]])[ +]b4_locations_if([[ yyerror_range[1] = yylloc;]])[ if (yyerrstatus == 3) { /* If just tried and failed to reuse lookahead token after an - error, discard it. */ + error, discard it. */ if (yychar <= YYEOF) - { - /* Return failure if at end of input. */ - if (yychar == YYEOF) - YYABORT; - } + { + /* Return failure if at end of input. */ + if (yychar == YYEOF) + YYABORT; + } else - { - yydestruct ("Error: discarding", - yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); - yychar = YYEMPTY; - } + { + yydestruct ("Error: discarding", + yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); + yychar = YYEMPTY; + } } /* Else will try to reuse lookahead token after shifting the error @@ -1377,8 +1805,8 @@ yyerrorlab: if (/*CONSTCOND*/ 0) goto yyerrorlab; -]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen]; -]])[ /* Do not reclaim the symbols of the rule which action triggered +]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen]; +]])[ /* Do not reclaim the symbols of the rule whose action triggered this YYERROR. */ YYPOPSTACK (yylen); yylen = 0; @@ -1391,40 +1819,46 @@ yyerrorlab: | yyerrlab1 -- common code for both syntax error and YYERROR. | `-------------------------------------------------------------*/ yyerrlab1: - yyerrstatus = 3; /* Each real token shifted decrements this. */ + yyerrstatus = 3; /* Each real token shifted decrements this. */ for (;;) { yyn = yypact[yystate]; - if (yyn != YYPACT_NINF) - { - yyn += YYTERROR; - if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) - { - yyn = yytable[yyn]; - if (0 < yyn) - break; - } - } + if (!yypact_value_is_default (yyn)) + { + yyn += YYTERROR; + if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) + { + yyn = yytable[yyn]; + if (0 < yyn) + break; + } + } /* Pop the current state because it cannot handle the error token. */ if (yyssp == yyss) - YYABORT; + YYABORT; -]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[ +]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[ yydestruct ("Error: popping", - yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); + yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); YYPOPSTACK (1); yystate = *yyssp; YY_STACK_PRINT (yyss, yyssp); - } + }]b4_lac_if([[ + + /* If the stack popping above didn't lose the initial context for the + current lookahead token, the shift below will for sure. */ + YY_LAC_DISCARD ("error recovery");]])[ + YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN *++yyvsp = yylval; + YY_IGNORE_MAYBE_UNINITIALIZED_END ]b4_locations_if([[ - yyerror_range[1] = yylloc; + yyerror_range[2] = yylloc; /* Using YYLLOC is tempting, but would change the location of the lookahead. YYLOC is available though. */ - YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2); + YYLLOC_DEFAULT (yyloc, yyerror_range, 2); *++yylsp = yyloc;]])[ /* Shift the error token. */ @@ -1448,7 +1882,7 @@ yyabortlab: yyresult = 1; goto yyreturn; -#if !defined(yyoverflow) || YYERROR_VERBOSE +#if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[ /*-------------------------------------------------. | yyexhaustedlab -- memory exhaustion comes here. | `-------------------------------------------------*/ @@ -1460,78 +1894,45 @@ yyexhaustedlab: yyreturn: if (yychar != YYEMPTY) - yydestruct ("Cleanup: discarding lookahead", - yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); - /* Do not reclaim the symbols of the rule which action triggered + { + /* Make sure we have latest lookahead translation. See comments at + user semantic actions for why this is necessary. */ + yytoken = YYTRANSLATE (yychar); + yydestruct ("Cleanup: discarding lookahead", + yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); + } + /* Do not reclaim the symbols of the rule whose action triggered this YYABORT or YYACCEPT. */ YYPOPSTACK (yylen); YY_STACK_PRINT (yyss, yyssp); while (yyssp != yyss) { yydestruct ("Cleanup: popping", - yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); + yystos[*yyssp], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[); YYPOPSTACK (1); } #ifndef yyoverflow if (yyss != yyssa) YYSTACK_FREE (yyss); -#endif +#endif]b4_lac_if([[ + if (yyes != yyesa) + YYSTACK_FREE (yyes);]])b4_push_if([[ + yyps->yynew = 1; + +yypushreturn:]])[ #if YYERROR_VERBOSE if (yymsg != yymsgbuf) YYSTACK_FREE (yymsg); #endif - /* Make sure YYID is used. */ - return YYID (yyresult); -]} - + return yyresult; +} +]b4_epilogue[]dnl +b4_output_end() -b4_epilogue b4_defines_if( -[@output(b4_spec_defines_file@) -b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl ' - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006]) - -b4_percent_code_get([[requires]])[]dnl - -b4_token_enums_defines(b4_tokens) - -[#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED -]m4_ifdef([b4_stype], -[[typedef union ]b4_union_name[ -{ -]b4_user_stype[ -} YYSTYPE; -# define YYSTYPE_IS_TRIVIAL 1]], -[m4_if(b4_tag_seen_flag, 0, -[[typedef int YYSTYPE; -# define YYSTYPE_IS_TRIVIAL 1]])])[ -# define yystype YYSTYPE /* obsolescent; will be withdrawn */ -# define YYSTYPE_IS_DECLARED 1 -#endif - -]b4_pure_if([], -[extern YYSTYPE b4_prefix[]lval;]) - -b4_locations_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 YYLTYPE /* obsolescent; will be withdrawn */ -# define YYLTYPE_IS_DECLARED 1 -# define YYLTYPE_IS_TRIVIAL 1 -#endif - -]b4_pure_if([], - [extern YYLTYPE b4_prefix[]lloc;]) -)dnl b4_locations_if - -b4_percent_code_get([[provides]]) -])dnl b4_defines_if -m4_divert_pop(0) +[b4_output_begin([b4_spec_defines_file])[ +]b4_copyright([Bison interface for Yacc-like parsers in C])[ -])dnl b4_use_push_for_pull_if +]b4_shared_declarations[ +]b4_output_end() +])# b4_defines_if