X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/93d0103dd443300312c57577040c135b79b85b26..dcd5344dcde3ddc4761867134e6f8cc7b945ce1c:/data/yacc.c?ds=sidebyside diff --git a/data/yacc.c b/data/yacc.c index be97f7fe..01756884 100644 --- a/data/yacc.c +++ b/data/yacc.c @@ -2,8 +2,8 @@ # Yacc compatible skeleton for Bison -# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, -# 2007, 2008, 2009 Free Software Foundation, Inc. +# Copyright (C) 1984, 1989-1990, 2000-2012 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 @@ -29,13 +29,26 @@ m4_case(b4_percent_define_get([[api.push-pull]]), [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, don't let BISON_USE_PUSH_FOR_PULL modify Bison's -# behavior at all when push parsing is already requested. +# 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]) ## ---------------- ## @@ -145,9 +158,9 @@ m4_define([b4_rhs_location], [(yylsp@{($2) - ($1)@})]) -## ------------------ ## -## Parser variables. ## -## ------------------ ## +## -------------- ## +## Declarations. ## +## -------------- ## # b4_declare_scanner_communication_variables # ------------------------------------------ @@ -184,7 +197,7 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[ `yyvs': related to semantic values.]b4_locations_if([[ `yyls': related to locations.]])[ - Refer to the stacks thru separate pointers, to allow yyoverflow + Refer to the stacks through separate pointers, to allow yyoverflow to reallocate them elsewhere. */ /* The state stack. */ @@ -203,22 +216,89 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[ YYLTYPE *yylsp; /* The locations where the error started and ended. */ - YYLTYPE yyerror_range[2];]])[ + 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;]])]) - YYSIZE_T yystacksize;]]) +# 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 -## --------------------------------------------------------- ## -## Defining symbol actions, e.g., printers and destructors. ## -## --------------------------------------------------------- ## +typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; + +]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param) +])b4_c_function_decl([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 const *pushed_loc]], [[pushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param])) +b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]], + [[b4_prefix[pstate *ps]], [[ps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))]) +b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]], + [[[void]], []]) +b4_c_function_decl([b4_prefix[pstate_delete]], [[void]], + [[b4_prefix[pstate *ps]], [[ps]]])dnl +]) + +# b4_declare_yyparse_ +# ------------------- +# When not the push parser. +m4_define([b4_declare_yyparse_], +[[#ifdef YYPARSE_PARAM +]b4_c_function_decl(b4_prefix[parse], [int], + [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ +#else /* ! YYPARSE_PARAM */ +]b4_c_function_decl(b4_prefix[parse], [int], b4_parse_param)[ +#endif /* ! YYPARSE_PARAM */]dnl +]) + + +# 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_tokens)[ +]b4_declare_yylstype[ +]b4_declare_yyparse[ +]b4_percent_code_get([[provides]])[ +]b4_cpp_guard_close([b4_spec_defines_file])[]dnl +]) + +## -------------- ## +## Output files. ## +## -------------- ## # 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], - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, - 2006, 2007, 2008, 2009])[ +b4_copyright([Bison implementation for Yacc-like parsers in C], + [1984, 1989-1990, 2000-2012])[ /* C LALR(1) parser skeleton written by Richard Stallman, by simplifying the original so-called "semantic" parser. */ @@ -232,7 +312,11 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C], ]b4_identification b4_percent_code_get([[top]])[]dnl -m4_if(b4_prefix, [yy], [], +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([[ @@ -245,16 +329,13 @@ m4_if(b4_prefix, [yy], [], #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]])])[ +#define yynerrs ]b4_prefix[nerrs]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 @@ -264,66 +345,11 @@ m4_if(b4_prefix, [yy], [], # define YYERROR_VERBOSE ]b4_error_verbose_flag[ #endif -/* Enabling the token table. */ -#ifndef YYTOKEN_TABLE -# define YYTOKEN_TABLE ]b4_token_table[ -#endif - -]b4_percent_code_get([[requires]])[]dnl +/* In a future release of Bison, this section will be replaced + by #include "@basename(]b4_spec_defines_file[@)". */ +]b4_shared_declarations[ -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_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_push_if([[ - -#ifndef YYPUSH_DECLS -# define YYPUSH_DECLS -struct yypstate; -typedef struct yypstate yypstate; -enum { YYPUSH_MORE = 4 }; - -]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param) -])b4_c_function_decl([[yypush_parse]], [[int]], - [[[yypstate *yyps]], [[yyps]]]b4_pure_if([, - [[[int yypushed_char]], [[yypushed_char]]], - [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, - [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, - b4_parse_param])) -b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]], - [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, - b4_parse_param]))]) -b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []]) -b4_c_function_decl([[yypstate_delete]], [[void]], - [[[yypstate *yyps]], [[yyps]]])[ -#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 @@ -373,7 +399,7 @@ 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) @@ -401,10 +427,10 @@ typedef short int yytype_int16; } #endif -#if ! defined yyoverflow || YYERROR_VERBOSE +#if ]b4_lac_if([[1]], [[! defined yyoverflow || YYERROR_VERBOSE]])[ -]b4_push_if([], -[[/* 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 @@ -419,18 +445,18 @@ 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 && ]b4_c_modern[ # 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]])])[ -]])dnl -[# ifdef YYSTACK_ALLOC +# ifdef YYSTACK_ALLOC /* Pacify GCC's `empty if-body' warning. */ # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0)) # ifndef YYSTACK_ALLOC_MAXIMUM @@ -446,34 +472,35 @@ 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))) # 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 && ]b4_c_modern[ 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 && ]b4_c_modern[ 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 @@ -496,23 +523,7 @@ 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 @@ -532,6 +543,26 @@ union yyalloc #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 (YYID (0)) +# endif +# endif +#endif /* !YYCOPY_NEEDED */ + /* YYFINAL -- State number of the termination state. */ #define YYFINAL ]b4_final_state_number[ /* YYLAST -- Last index in YYTABLE. */ @@ -559,7 +590,7 @@ static const ]b4_int_type_for([b4_translate])[ yytranslate[] = ]b4_translate[ }; -#if YYDEBUG +#if ]b4_api_PREFIX[DEBUG /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in YYRHS. */ static const ]b4_int_type_for([b4_prhs])[ yyprhs[] = @@ -580,7 +611,7 @@ static const ]b4_int_type_for([b4_rline])[ yyrline[] = }; #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[] = @@ -677,24 +708,34 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] = /* 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. */ + Once GCC version 2 has supplanted version 1, this can go. However, + YYFAIL appears to be in use. Nevertheless, it is formally deprecated + in Bison 2.4.2's NEWS entry, where a plan to phase it out is + discussed. */ #define YYFAIL goto yyerrlab +#if defined YYFAIL + /* This is here to suppress warnings from the GCC cpp's + -Wunused-macros. Normally we don't worry about that warning, but + some users do, and we want to make it easy for users to remove + YYFAIL uses, which will produce warnings from Bison 2.5. */ +#endif #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; \ } \ @@ -704,31 +745,9 @@ while (YYID (0)) #define YYTERROR 1 #define YYERRCODE 256 - -/* 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_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 +]b4_locations_if([[ /* YY_LOCATION_PRINT -- Print the location on the stream. @@ -736,7 +755,7 @@ while (YYID (0)) we won't break user code: when these are the locations we know. */ #ifndef YY_LOCATION_PRINT -# if YYLTYPE_IS_TRIVIAL +# if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL # define YY_LOCATION_PRINT(File, Loc) \ fprintf (File, "%d.%d-%d.%d", \ (Loc).first_line, (Loc).first_column, \ @@ -744,7 +763,14 @@ while (YYID (0)) # else # define YY_LOCATION_PRINT(File, Loc) ((void) 0) # endif -#endif +#endif]], [[ + + +/* This macro is provided for backward compatibility. */ + +#ifndef YY_LOCATION_PRINT +# define YY_LOCATION_PRINT(File, Loc) ((void) 0) +#endif]])[ /* YYLEX -- calling `yylex' with the right arguments. */ @@ -756,7 +782,7 @@ while (YYID (0)) #endif /* Enable debugging if requested. */ -#if YYDEBUG +#if ]b4_api_PREFIX[DEBUG # ifndef YYFPRINTF # include /* INFRINGES ON USER NAME SPACE */ @@ -843,12 +869,12 @@ do { \ /* 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. */ @@ -865,9 +891,244 @@ 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 (YYID (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 (YYID (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 @@ -955,132 +1216,174 @@ 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]; - - if (! (YYPACT_NINF < yyn && yyn <= YYLAST)) - return 0; - else + YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]); + YYSIZE_T yysize = yysize0; + YYSIZE_T yysize1; + 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: + - Assume YYFAIL is not used. It's too flawed to consider. See + + for details. YYERROR is fine as it does not invoke this + function. + - 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 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. 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 yycount = 1; - - yyarg[0] = yytname[yytype]; - yyfmt = yystpcpy (yyformat, yyunexpected); - - 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; - 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; - } + 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]; + 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]])[ + } - yyf = YY_(yyformat); - yysize1 = yysize + yystrlen (yyf); - yysize_overflow |= (yysize1 < yysize); - yysize = yysize1; + switch (yycount) + { +# define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(0, YY_("syntax error")); + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +# undef YYCASE_ + } - if (yysize_overflow) - return YYSIZE_MAXIMUM; + yysize1 = yysize + yystrlen (yyformat); + if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) + return 2; + yysize = yysize1; - 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; + 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_push_if([], [[ +]b4_yydestruct_generate([b4_c_function_def])[ - -/* Prevent warnings from -Wmissing-prototypes. */ -#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_pure_if([], [ +]b4_pure_if([], [ 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 @@ -1092,7 +1395,7 @@ static char yypstate_allocated = 0;]])b4_pull_if([ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ { - return yypull_parse (0]m4_ifset([b4_parse_param], + return yypull_parse (YY_NULL]m4_ifset([b4_parse_param], [[, ]b4_c_args(b4_parse_param)])[); } @@ -1105,7 +1408,9 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ int yychar; YYSTYPE yylval;]b4_locations_if([[ YYLTYPE yylloc;]])])[ - if (yyps == 0) + if (yyps) + yyps_local = yyps; + else { yyps_local = yypstate_new (); if (!yyps_local) @@ -1116,14 +1421,12 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ return 2; } } - else - yyps_local = yyps; do { yychar = YYLEX; yystatus = yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[); } while (yystatus == YYPUSH_MORE); - if (yyps == 0) + if (!yyps) yypstate_delete (yyps_local); return yystatus; }]])[ @@ -1133,10 +1436,10 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ { yypstate *yyps;]b4_pure_if([], [[ if (yypstate_allocated) - return 0;]])[ + return YY_NULL;]])[ yyps = (yypstate *) malloc (sizeof *yyps); if (!yyps) - return 0; + return YY_NULL; yyps->yynew = 1;]b4_pure_if([], [[ yypstate_allocated = 1;]])[ return yyps; @@ -1150,7 +1453,9 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ stack still needs to be freed. */ if (!yyps->yynew && yyps->yyss != yyps->yyssa) YYSTACK_FREE (yyps->yyss); -#endif +#endif]b4_lac_if([[ + if (!yyps->yynew && yyps->yyes != yyps->yyesa) + YYSTACK_FREE (yyps->yyes);]])[ free (yyps);]b4_pure_if([], [[ yypstate_allocated = 0;]])[ } @@ -1168,7 +1473,10 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ #define yyls yyps->yyls #define yylsp yyps->yylsp #define yyerror_range yyps->yyerror_range]])[ -#define yystacksize yyps->yystacksize +#define yystacksize yyps->yystacksize]b4_lac_if([[ +#define yyesa yyps->yyesa +#define yyes yyps->yyes +#define yyes_capacity yyps->yyes_capacity]])[ /*---------------. @@ -1200,7 +1508,8 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ YYLTYPE yypushed_loc = yylloc;]]) ])], [b4_declare_parser_state_variables -])[ +])b4_lac_if([[ + int yy_lac_established = 0;]])[ int yyn; int yyresult; /* Lookahead token as an internal (translated) token number. */ @@ -1233,7 +1542,12 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ yyss = yyssa; yyvs = yyvsa;]b4_locations_if([[ yyls = yylsa;]])[ - yystacksize = YYINITDEPTH; + 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")); @@ -1250,23 +1564,22 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ yyvsp = yyvs;]b4_locations_if([[ yylsp = yyls; -#if YYLTYPE_IS_TRIVIAL +#if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_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 +b4_dollar_pushdef([m4_define([b4_dollar_dollar_used])yylval], [], + [m4_define([b4_at_dollar_used])yylloc])dnl /* User initialization code. */ b4_user_initial_action -m4_popdef([b4_dollar_dollar])dnl -m4_popdef([b4_at_dollar])])dnl +b4_dollar_popdef[]dnl m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval; ]])dnl m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; -]])[ - goto yysetstate; +]])])dnl +[ goto yysetstate; /*------------------------------------------------------------. | yynewstate -- Push a new state, which is found in yystate. | @@ -1407,13 +1720,18 @@ yyread_pushed_token:]])[ /* 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 (yytable_value_is_error (yyn)) - goto yyerrlab; + goto yyerrlab;]b4_lac_if([[ + YY_LAC_ESTABLISH;]])[ yyn = -yyn; goto yyreduce; } @@ -1427,7 +1745,8 @@ yyread_pushed_token:]])[ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); /* Discard the shifted token. */ - yychar = YYEMPTY; + yychar = YYEMPTY;]b4_lac_if([[ + YY_LAC_DISCARD ("shift");]])[ yystate = yyn; *++yyvsp = yylval; @@ -1465,12 +1784,33 @@ 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); @@ -1499,6 +1839,10 @@ yyreduce: | 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) { @@ -1506,41 +1850,43 @@ 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) { @@ -1577,7 +1923,7 @@ yyerrorlab: if (/*CONSTCOND*/ 0) goto yyerrorlab; -]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen]; +]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen]; ]])[ /* Do not reclaim the symbols of the rule which action triggered this YYERROR. */ YYPOPSTACK (yylen); @@ -1611,20 +1957,24 @@ yyerrlab1: if (yyssp == yyss) 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[); 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");]])[ *++yyvsp = yylval; ]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. */ @@ -1648,7 +1998,7 @@ yyabortlab: yyresult = 1; goto yyreturn; -#if !defined(yyoverflow) || YYERROR_VERBOSE +#if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[ /*-------------------------------------------------. | yyexhaustedlab -- memory exhaustion comes here. | `-------------------------------------------------*/ @@ -1660,8 +2010,13 @@ yyexhaustedlab: yyreturn: if (yychar != YYEMPTY) - yydestruct ("Cleanup: discarding lookahead", - yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); + { + /* 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 which action triggered this YYABORT or YYACCEPT. */ YYPOPSTACK (yylen); @@ -1675,7 +2030,9 @@ yyreturn: #ifndef yyoverflow if (yyss != yyssa) YYSTACK_FREE (yyss); -#endif]b4_push_if([[ +#endif]b4_lac_if([[ + if (yyes != yyesa) + YYSTACK_FREE (yyes);]])b4_push_if([[ yyps->yynew = 1; yypushreturn:]])[ @@ -1688,71 +2045,12 @@ yypushreturn:]])[ } -]b4_epilogue +]b4_epilogue[]dnl b4_defines_if( [@output(b4_spec_defines_file@)@ -b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C], - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, - 2006, 2007, 2008, 2009]) - -b4_percent_code_get([[requires]])[]dnl - -b4_token_enums_defines(b4_tokens) +b4_copyright([Bison interface for Yacc-like parsers in C], + [1984, 1989-1990, 2000-2012])[ -[#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_push_if([[ -#ifndef YYPUSH_DECLS -# define YYPUSH_DECLS -struct ]b4_prefix[pstate; -typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; -enum { YYPUSH_MORE = 4 }; -]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param) -])b4_c_function_decl([b4_prefix[push_parse]], [[int]], - [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([, - [[[int yypushed_char]], [[yypushed_char]]], - [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, - [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, - b4_parse_param])) -b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]], - [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, - b4_parse_param]))]) -b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]], - [[[void]], []]) -b4_c_function_decl([b4_prefix[pstate_delete]], [[void]], - [[b4_prefix[pstate *yyps]], [[yyps]]])[ -#endif -]]) -b4_percent_code_get([[provides]])[]dnl -])dnl b4_defines_if +]b4_shared_declarations[ +]])dnl b4_defines_if m4_divert_pop(0)