m4_divert(-1) -*- YYC -*- # b4_sint_type(MAX) # ----------------- # Return the smallest signed int type able to handle the number MAX. m4_define([b4_sint_type], [m4_if(m4_eval([$1 <= 127]), [1], [signed char], m4_eval([$1 <= 32767]), [1], [signed short], [signed int])]) # b4_uint_type(MAX) # ----------------- # Return the smallest unsigned int type able to handle the number MAX. m4_define([b4_uint_type], [m4_if(m4_eval([$1 <= 255]), [1], [unsigned char], m4_eval([$1 <= 65535]), [1], [unsigned short], [unsigned int])]) # b4_lhs_value([TYPE]) # -------------------- # Expansion of $$. m4_define([b4_lhs_value], [(*yyvalp)[]m4_ifval([$1], [.$1])]) # b4_rhs_value(RULE-LENGTH, NUM, [TYPE]) # -------------------------------------- # Expansion of $NUM, where the current rule has RULE-LENGTH # symbols on RHS. m4_define([b4_rhs_value], [yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yysemantics.yysval[]m4_ifval([$3], [.$3])]) ## ----------- ## ## Locations. ## ## ----------- ## # b4_location_if(IF-TRUE, IF-FALSE) # --------------------------------- # Expand IF-TRUE, if locations are used, IF-FALSE otherwise. m4_define([b4_location_if], [m4_if(b4_locations_flag, [1], [$1], [$2])]) # b4_lhs_location() # ----------------- # Expansion of @$. m4_define([b4_lhs_location], [(*yylocp)]) # b4_rhs_location(RULE-LENGTH, NUM) # --------------------------------- # Expansion of @NUM, where the current rule has RULE-LENGTH symbols # on RHS. m4_define([b4_rhs_location], [yyvsp@<:@m4_eval([$2 - $1])@:>@.yystate.yyloc]) ## -------------- ## ## %pure-parser. ## ## -------------- ## # b4_pure_if(IF-TRUE, IF-FALSE) # ----------------------------- # Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise. m4_define([b4_pure_if], [m4_if(b4_pure, [1], [$1], [$2])]) ## ------------------- ## ## Output file names. ## ## ------------------- ## m4_define_default([b4_input_suffix], [.y]) m4_define_default([b4_output_parser_suffix], [m4_translit(b4_input_suffix, [yY], [cC])]) m4_define_default([b4_output_parser_name], [b4_output_prefix[]b4_output_infix[]b4_output_parser_suffix[]]) m4_define_default([b4_output_header_suffix], [m4_translit(b4_input_suffix, [yY], [hH])]) m4_define_default([b4_output_header_name], [b4_output_prefix[]b4_output_infix[]b4_output_header_suffix[]]) m4_define_default([b4_header_guard], [m4_bpatsubst(m4_toupper([BISON_]b4_output_header_name), [[^ABCDEFGHIJKLMNOPQRSTUVWXYZ]], [_])]) ## ------------------------- ## ## Assigning token numbers. ## ## ------------------------- ## # b4_token_define(TOKEN-NAME, TOKEN-NUMBER) # ----------------------------------------- # Output the definition of this token as #define. m4_define([b4_token_define], [#define $1 $2 ]) # b4_token_enum(TOKEN-NAME, TOKEN-NUMBER) # --------------------------------------- # Output the definition of this token as an enum. m4_define([b4_token_enum], [$1 = $2]) # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------- # Output the definition of the tokens (if there are) as enums and #define. m4_define([b4_token_defines], [m4_if([$@], [[]], [], [/* Tokens. */ #ifndef YYTOKENTYPE # if defined (__STDC__) || defined (__cplusplus) /* Put the tokens into the symbol table, so that GDB and other debuggers know about them. */ enum yytokentype { m4_map_sep([ b4_token_enum], [, ], [$@]) }; # endif /* POSIX requires `int' for tokens in interfaces. */ # define YYTOKENTYPE int #endif /* !YYTOKENTYPE */ m4_map([b4_token_define], [$@]) ]) ]) m4_divert(0)dnl #output "b4_output_parser_name" [/* Skeleton parser for GLR parsing with Bison, Copyright (C) 2002 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* As a special exception, when this file is copied by Bison into a Bison output file, you may use that output file without restriction. This special exception was added by the Free Software Foundation in version 1.24 of Bison. */ /* This is the parser code for GLR (Generalized LR) parser. */ /* FIXME: minimize these */ #include #include #include #include #include /* Identify Bison output. */ #define YYBISON 1 /* Pure parsers. */ #define YYPURE ]b4_pure[ /* Using locations. */ #define YYLSP_NEEDED ]b4_locations_flag[ ]m4_if(b4_prefix[], [yy], [], [/* If NAME_PREFIX is specified substitute the variables and functions names. */ #define yyparse b4_prefix[]parse #define yylex b4_prefix[]lex #define yyerror b4_prefix[]error #define yylval b4_prefix[]lval #define yychar b4_prefix[]char #define yydebug b4_prefix[]debug #define yynerrs b4_prefix[]nerrs b4_location_if([#define yylloc b4_prefix[]lloc])]) /* Copy the first part of user declarations. */ b4_pre_prologue b4_token_defines(b4_tokens)[ /* Enabling traces. */ #ifndef YYDEBUG # define YYDEBUG ]b4_debug[ #endif /* Enabling verbose error messages. */ #ifdef YYERROR_VERBOSE # undef YYERROR_VERBOSE # define YYERROR_VERBOSE 1 #else # define YYERROR_VERBOSE ]b4_error_verbose[ #endif #ifndef YYSTYPE ]m4_ifdef([b4_stype], [#line b4_stype_line "b4_filename" typedef union b4_stype yystype; /* Line __line__ of __file__. */ #line __oline__ "__ofile__"], [typedef int yystype;])[ # define YYSTYPE yystype # define YYSTYPE_IS_TRIVIAL 1 #endif #ifndef YYLTYPE typedef struct yyltype { ]b4_location_if([ int yyfirst_line; int yyfirst_column; int yylast_line; int yylast_column;])[ } yyltype; # define YYLTYPE ]b4_ltype[ # define YYLTYPE_IS_TRIVIAL 1 #endif /* Default (constant) values used for initialization for null right-hand sides. Unlike the standard bison.simple template, here we set the default values of the $$ and $@ to zeroed-out values. Since the default value of these quantities is undefined, this behavior is technically correct. */ static YYSTYPE yyval_default; static YYLTYPE yyloc_default; /* Copy the second part of user declarations. */ ]b4_post_prologue[ ]/* Line __line__ of __file__. */ #line __oline__ "__ofile__" [ #if ! defined (__cplusplus) typedef char bool; # define yytrue 1 # define yyfalse 0 #endif #if ! defined (yy__GNUC__) # define inline #endif /* YYFINAL -- State number of the termination state. */ #define YYFINAL ]b4_final[ #define YYFLAG ]b4_flag[ #define YYLAST ]b4_last[ /* YYNTOKENS -- Number of terminals. */ #define YYNTOKENS ]b4_ntokens[ /* YYNNTS -- Number of nonterminals. */ #define YYNNTS ]b4_nnts[ /* YYNRULES -- Number of rules. */ #define YYNRULES ]b4_nrules[ /* YYNRULES -- Number of states. */ #define YYNSTATES ]b4_nstates[ /* YYMAXRHS -- Maximum number of symbols on right-hand side of rule. */ #define YYMAXRHS ]b4_r2_max[ /* YYTRANSLATE(X) -- Bison symbol number corresponding to X. */ #define YYUNDEFTOK ]b4_undef_token_number[ #define YYMAXUTOK ]b4_user_token_number_max[ #define YYTRANSLATE(YYX) \ ((unsigned)(YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK) /* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX. */ static const ]b4_uint_type(b4_translate_max)[ yytranslate[] = { ]b4_translate[ }; #if YYDEBUG /* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in YYRHS. */ static const ]b4_uint_type(b4_prhs_max)[ yyprhs[] = { ]b4_prhs[ }; /* YYRHS -- A `-1'-separated list of the rules' RHS. */ static const ]b4_sint_type(b4_rhs_max)[ yyrhs[] = { ]b4_rhs[ }; /* YYRLINE[YYN] -- source line where rule number YYN was defined. */ static const ]b4_uint_type(b4_rline_max)[ yyrline[] = { ]b4_rline[ }; #endif #if (YYDEBUG) || YYERROR_VERBOSE /* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM. First, the terminals, then, starting at YYNTOKENS, nonterminals. */ static const char *const yytname[] = { ]b4_tname[ }; #define yytname_size (sizeof (yytname) / sizeof (yytname[0])) #endif /* YYR1[YYN] -- Symbol number of symbol that rule YYN derives. */ static const ]b4_uint_type(b4_r1_max)[ yyr1[] = { ]b4_r1[ }; /* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN. */ static const ]b4_uint_type(b4_r2_max)[ yyr2[] = { ]b4_r2[ }; /* YYDPREC[RULE-NUM] -- Dynamic precedence of rule #RULE-NUM (0 if none). */ static const short yydprec[] = { ]b4_dprec[ }; /* YYMERGER[RULE-NUM] -- Index of merging function for rule #RULE-NUM. */ static const short yymerger[] = { ]b4_merger[ }; /* YYDEFACT[S] -- default rule to reduce with in state S when YYTABLE doesn't specify something else to do. Zero means the default is an error. */ static const short yydefact[] = { ]b4_defact[ }; /* YYPGOTO[NTERM-NUM]. */ static const short yydefgoto[] = { ]b4_defgoto[ }; /* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing STATE-NUM. */ static const short yypact[] = { ]b4_pact[ }; /* YYPGOTO[NTERM-NUM]. */ static const short yypgoto[] = { ]b4_pgoto[ }; /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which number is the opposite. If zero, do what YYDEFACT says. */ static const short yytable[] = { ]b4_table[ }; /* YYCONFLP[YYPACT[STATE-NUM]] -- pointer into yyconfl of start of list of conflicting reductions corresponding to action entry for state STATE-NUM in yytable. 0 means no conflicts. The list in yyconfl is terminated by a rule number of 0. */ static const short yyconflp[] = { ]b4_conflict_list_heads[ }; /* YYCONFL[I] -- lists of conflicting rule numbers, each terminated by 0, pointed into by YYCONFLP. */ static const short yyconfl[] = { ]b4_conflicting_rules[ }; static const short yycheck[] = { ]b4_check[ }; /* The user can define YYPARSE_PARAM as the name of an argument to be passed into yyparse. The argument should have type void *. It should actually point to an object. Grammar actions can access the variable by casting it to the proper pointer type. */ #ifdef YYPARSE_PARAM # define YYPARSE_PARAM_ARG void *YYPARSE_PARAM #else /* !YYPARSE_PARAM */ # define YYPARSE_PARAM_ARG void #endif /* !YYPARSE_PARAM */ /* Prevent warning if -Wstrict-prototypes. */ #ifdef __GNUC__ # ifdef YYPARSE_PARAM int yyparse (void *); # else int yyparse (void); # endif #endif /* Error token number */ #define YYTERROR 1 /* YYLLOC_DEFAULT -- Compute the default location (before the actions are run). */ #define YYRHSLOC(yyRhs,YYK) (yyRhs[YYK].yystate.yyloc) #ifndef YYLLOC_DEFAULT # define YYLLOC_DEFAULT(yyCurrent, yyRhs, YYN) \ yyCurrent.yyfirst_line = YYRHSLOC(yyRhs,1).yyfirst_line; \ yyCurrent.yyfirst_column = YYRHSLOC(yyRhs,1).yyfirst_column; \ yyCurrent.yylast_line = YYRHSLOC(yyRhs,YYN).yylast_line; \ yyCurrent.yylast_column = YYRHSLOC(yyRhs,YYN).yylast_column; #endif /* YYLEX -- calling `yylex' with the right arguments. */ ]b4_pure_if( [ #ifdef YYLEX_PARAM # define YYLEX yylex (yylvalp, b4_location_if([yyllocp, ])YYLEX_PARAM) #else # define YYLEX yylex (yylvalp[]b4_location_if([, yyllocp])) #endif], [#define YYLEX yylex ()]) b4_pure_if( [ #undef yynerrs #define yynerrs (yystack->yyerrcnt) #undef yychar #define yychar (yystack->yyrawchar)], [YYSTYPE yylval; YYLTYPE yylloc; int yynerrs; int yychar;])[ static const int YYEOF = 0; static const int YYEMPTY = -2; typedef enum { yyok, yyaccept, yyabort, yyerr } YYRESULTTAG; #define YYCHK(YYE) \ do { YYRESULTTAG yyflag = YYE; if (yyflag != yyok) return yyflag; } \ while (0) #if YYDEBUG #if ! defined (YYFPRINTF) # define YYFPRINTF fprintf #endif # define YYDPRINTF(Args) \ do { \ if (yydebug) \ YYFPRINTF Args; \ } while (0) /* Nonzero means print parse trace. It is left uninitialized so that multiple parsers can coexist. */ int yydebug; #else /* !YYDEBUG */ # define YYDPRINTF(Args) #endif /* !YYDEBUG */ /* YYINITDEPTH -- initial size of the parser's stacks. */ #ifndef YYINITDEPTH # define YYINITDEPTH ]b4_initdepth[ #endif /* YYMAXDEPTH -- maximum size the stacks can grow to (effective only if the built-in stack extension method is used). Do not make this value too large; the results are undefined if SIZE_MAX < YYMAXDEPTH * sizeof (GLRStackItem) evaluated with infinite-precision integer arithmetic. */ #if YYMAXDEPTH == 0 # undef YYMAXDEPTH #endif #ifndef YYMAXDEPTH # define YYMAXDEPTH ]b4_maxdepth[ #endif /* Minimum number of free items on the stack allowed after an allocation. This is to allow allocation and initialization to be completed by functions that call expandGLRStack before the stack is expanded, thus insuring that all necessary pointers get properly redirected to new data. */ #define YYHEADROOM 2 #if ! defined (YYSTACKEXPANDABLE) \ && (! defined (__cplusplus) || (YYLTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)) #define YYSTACKEXPANDABLE 1 #else #define YYSTACKEXPANDABLE 0 #endif /** State numbers, as in LALR(1) machine */ typedef int yyStateNum; /** Rule numbers, as in LALR(1) machine */ typedef int yyRuleNum; /** Grammar symbol */ typedef short yySymbol; /** Item references, as in LALR(1) machine */ typedef short yyItemNum; typedef struct yyGLRState yyGLRState; typedef struct yySemanticOption yySemanticOption; typedef union yyGLRStackItem yyGLRStackItem; typedef struct yyGLRStack yyGLRStack; typedef struct yyGLRStateSet yyGLRStateSet; struct yyGLRState { bool yyisState; bool yyresolved; yyStateNum yylrState; yyGLRState* yypred; size_t yyposn; union { yySemanticOption* yyfirstVal; YYSTYPE yysval; } yysemantics; YYLTYPE yyloc; }; struct yyGLRStateSet { yyGLRState** yystates; size_t yysize, yycapacity; }; struct yySemanticOption { bool yyisState; yyRuleNum yyrule; yyGLRState* yystate; yySemanticOption* yynext; }; union yyGLRStackItem { yyGLRState yystate; yySemanticOption yyoption; }; struct yyGLRStack { int yyerrflag; int yyerrState; ]b4_pure_if( [ int yyerrcnt; int yyrawchar; ])[ yySymbol* yytokenp; jmp_buf yyexception_buffer; yyGLRStackItem* yyitems; yyGLRStackItem* yynextFree; int yyspaceLeft; yyGLRState* yysplitPoint; yyGLRState* yylastDeleted; yyGLRStateSet yytops; }; static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize); static void yyexpandGLRStack (yyGLRStack* yystack); static void yyfreeGLRStack (yyGLRStack* yystack); static void yyFail (yyGLRStack* yystack, const char* yyformat, ...) { if (yyformat != NULL) { char yymsg[256]; va_list yyap; va_start (yyap, yyformat); yystack->yyerrflag = 1; vsprintf (yymsg, yyformat, yyap); yyerror (yymsg); } longjmp (yystack->yyexception_buffer, 1); } #if YYDEBUG || YYERROR_VERBOSE /** A printable representation of TOKEN. Valid until next call to * tokenName. */ static inline const char* yytokenName (yySymbol yytoken) { return yytname[yytoken]; } #endif /** Perform user action for rule number YYN, with RHS length YYRHSLEN, * and top stack item YYVSP. YYLVALP points to place to put semantic * value ($$), and yylocp points to place for location information * (@$). Returns yyok for normal return, yyaccept for YYACCEPT, * yyerr for YYERROR, yyabort for YYABORT. */ static YYRESULTTAG yyuserAction (yyRuleNum yyn, int yyrhslen, yyGLRStackItem* yyvsp, YYSTYPE* yyvalp, YYLTYPE* yylocp, yyGLRStack* yystack) { if (yyrhslen == 0) { *yyvalp = yyval_default; *yylocp = yyloc_default; } else { *yyvalp = yyvsp[1-yyrhslen].yystate.yysemantics.yysval; *yylocp = yyvsp[1-yyrhslen].yystate.yyloc; } # undef yyval # define yyval (*yyvalp) # undef yyerrok # define yyerrok (yystack->yyerrState = 0) # undef YYACCEPT # define YYACCEPT return yyaccept # undef YYABORT # define YYABORT return yyabort # undef YYERROR # define YYERROR return yyerr # undef YYRECOVERING # define YYRECOVERING (yystack->yyerrState != 0) # undef yyclearin # define yyclearin (yychar = *(yystack->yytokenp) = YYEMPTY) # undef YYBACKUP # define YYBACKUP(Token, Value) \ do { \ yyerror ("syntax error: cannot back up"); \ YYERROR; \ } while (0) ] switch (yyn) { b4_actions } return yyok; # undef yyval # undef yyerrok # undef YYABORT # undef YYACCEPT # undef YYERROR # undef YYBACKUP # undef yyclearin # undef YYRECOVERING /* Line __line__ of __file__. */ #line __oline__ "__ofile__" } static YYSTYPE yyuserMerge (int yyn, YYSTYPE* yy0, YYSTYPE* yy1) { YYSTYPE yyval = *yy0; switch (yyn) { b4_mergers } return yyval; } [ /* Bison grammar-table manipulation */ /** Number of symbols composing the right hand side of rule #RULE. */ static inline int yyrhsLength (yyRuleNum yyrule) { return yyr2[yyrule]; } /** Left-hand-side symbol for rule #RULE. */ static inline yySymbol yylhsNonterm (yyRuleNum yyrule) { return yyr1[yyrule]; } /** True iff LR state STATE has only a default reduction (regardless * of token). */ static inline bool yyisDefaultedState (yyStateNum yystate) { return yypact[yystate] == YYFLAG; } /** The default reduction for STATE, assuming it has one. */ static inline yyRuleNum yydefaultAction (yyStateNum yystate) { return yydefact[yystate]; } /** Set *ACTION to the action to take in STATE on seeing TOKEN. * Result R means * R < 0: Reduce on rule -R. * R = 0: Error. * R > 0: Shift to state R. * Set *CONFLICTS to a pointer into yyconfl to 0-terminated list of * conflicting reductions. */ static inline void yygetLRActions (yyStateNum yystate, int yytoken, int* yyaction, const short** yyconflicts) { int yyindex = yypact[yystate] + yytoken; if (yyindex < 0 || yyindex > YYLAST || yycheck[yyindex] != yytoken) { *yyaction = -yydefact[yystate]; *yyconflicts = yyconfl; } else { *yyaction = yytable[yyindex]; *yyconflicts = yyconfl + yyconflp[yyindex]; } } static inline yyStateNum yyLRgotoState (yyStateNum yystate, yySymbol yylhs) { int yyr; yyr = yypgoto[yylhs - YYNTOKENS] + yystate; if (yyr >= 0 && yyr <= YYLAST && yycheck[yyr] == yystate) return yytable[yyr]; else return yydefgoto[yylhs - YYNTOKENS]; } static inline bool yyisShiftAction (int yyaction) { return yyaction > 0; } static inline bool yyisErrorAction (int yyaction) { return yyaction == 0 || yyaction == YYFLAG; } /* GLRStates */ /** True iff the semantic value of the edge leading to STATE is * resolved. */ static inline bool yyhasResolvedValue (yyGLRState* yystate) { return yystate->yyresolved; } void yyaddDeferredAction (yyGLRStack* yystack, yyGLRState* yystate, yyGLRState* yyrhs, yyRuleNum yyrule) { yySemanticOption* yynewItem; yynewItem = &yystack->yynextFree->yyoption; yystack->yyspaceLeft -= 1; yystack->yynextFree += 1; yynewItem->yyisState = yyfalse; yynewItem->yystate = yyrhs; yynewItem->yyrule = yyrule; yynewItem->yynext = yystate->yysemantics.yyfirstVal; yystate->yysemantics.yyfirstVal = yynewItem; if (yystack->yyspaceLeft < YYHEADROOM) yyexpandGLRStack (yystack); } /* GLRStacks */ /** Initialize SET to a singleton set containing an empty stack. */ static void yyinitStateSet (yyGLRStateSet* yyset) { yyset->yysize = 1; yyset->yycapacity = 16; yyset->yystates = (yyGLRState**) malloc (16 * sizeof (yyset->yystates[0])); yyset->yystates[0] = NULL; } static void yyfreeStateSet (yyGLRStateSet* yyset) { free (yyset->yystates); } /** Initialize STACK to a single empty stack, with total maximum * capacity for all stacks of SIZE. */ static void yyinitGLRStack (yyGLRStack* yystack, size_t yysize) { yystack->yyerrflag = 0; yystack->yyerrState = 0; yynerrs = 0; yystack->yyspaceLeft = yysize; yystack->yynextFree = yystack->yyitems = (yyGLRStackItem*) malloc (yysize * sizeof (yystack->yynextFree[0])); yystack->yysplitPoint = NULL; yystack->yylastDeleted = NULL; yyinitStateSet (&yystack->yytops); } #define YYRELOC(YYFROMITEMS,YYTOITEMS,YYX,YYTYPE) \ &((YYTOITEMS) - ((YYFROMITEMS) - (yyGLRStackItem*) (YYX)))->YYTYPE /** If STACK is expandable, extend it. WARNING: Pointers into the stack from outside should be considered invalid after this call. We always expand when there are 1 or fewer items left AFTER an allocation, so that we can avoid having external pointers exist across an allocation. */ static void yyexpandGLRStack (yyGLRStack* yystack) { #if YYSTACKEXPANDABLE yyGLRStack yynewStack; yyGLRStackItem* yyp0, *yyp1; size_t yysize, yynewSize; size_t yyn; yysize = yystack->yynextFree - yystack->yyitems; if (yysize >= YYMAXDEPTH) yyFail (yystack, "parsing stack overflow (%d items)", yysize); yynewSize = 2*yysize; if (yynewSize > YYMAXDEPTH) yynewSize = YYMAXDEPTH; yyinitGLRStack (&yynewStack, yynewSize); for (yyp0 = yystack->yyitems, yyp1 = yynewStack.yyitems, yyn = yysize; yyn > 0; yyn -= 1, yyp0 += 1, yyp1 += 1) { *yyp1 = *yyp0; if (*(bool*) yyp0) { yyGLRState* yys0 = &yyp0->yystate; yyGLRState* yys1 = &yyp1->yystate; if (yys0->yypred != NULL) yys1->yypred = YYRELOC (yyp0, yyp1, yys0->yypred, yystate); if (! yys0->yyresolved && yys0->yysemantics.yyfirstVal != NULL) yys1->yysemantics.yyfirstVal = YYRELOC(yyp0, yyp1, yys0->yysemantics.yyfirstVal, yyoption); } else { yySemanticOption* yyv0 = &yyp0->yyoption; yySemanticOption* yyv1 = &yyp1->yyoption; if (yyv0->yystate != NULL) yyv1->yystate = YYRELOC (yyp0, yyp1, yyv0->yystate, yystate); if (yyv0->yynext != NULL) yyv1->yynext = YYRELOC (yyp0, yyp1, yyv0->yynext, yyoption); } } if (yystack->yysplitPoint != NULL) yystack->yysplitPoint = YYRELOC (yystack->yyitems, yynewStack.yyitems, yystack->yysplitPoint, yystate); for (yyn = 0; yyn < yystack->yytops.yysize; yyn += 1) if (yystack->yytops.yystates[yyn] != NULL) yystack->yytops.yystates[yyn] = YYRELOC (yystack->yyitems, yynewStack.yyitems, yystack->yytops.yystates[yyn], yystate); free (yystack->yyitems); yystack->yyitems = yynewStack.yyitems; yystack->yynextFree = yynewStack.yynextFree + yysize; yystack->yyspaceLeft = yynewStack.yyspaceLeft - yysize; #else yyFail (yystack, "parsing stack overflow (%d items)", yysize); #endif } static void yyfreeGLRStack (yyGLRStack* yystack) { free (yystack->yyitems); yyfreeStateSet (&yystack->yytops); } /** Assuming that S is a GLRState somewhere on STACK, update the * splitpoint of STACK, if needed, so that it is at least as deep as * S. */ static inline void yyupdateSplit (yyGLRStack* yystack, yyGLRState* yys) { if (yystack->yysplitPoint != NULL && yystack->yysplitPoint > yys) yystack->yysplitPoint = yys; } /** Invalidate stack #K in STACK. */ static inline void yymarkStackDeleted (yyGLRStack* yystack, int yyk) { if (yystack->yytops.yystates[yyk] != NULL) yystack->yylastDeleted = yystack->yytops.yystates[yyk]; yystack->yytops.yystates[yyk] = NULL; } /** Undelete the last stack that was marked as deleted. Can only be done once after a deletion, and only when all other stacks have been deleted. */ static void yyundeleteLastStack (yyGLRStack* yystack) { if (yystack->yylastDeleted == NULL || yystack->yytops.yysize != 0) return; yystack->yytops.yystates[0] = yystack->yylastDeleted; yystack->yytops.yysize = 1; YYDPRINTF ((stderr, "Restoring last deleted stack as stack #0.\n")); yystack->yylastDeleted = NULL; } static inline void yyremoveDeletes (yyGLRStack* yystack) { int yyi, yyj; yyi = yyj = 0; while (yyj < yystack->yytops.yysize) { if (yystack->yytops.yystates[yyi] == NULL) { if (YYDEBUG && yyi == yyj) YYDPRINTF ((stderr, "Removing dead stacks.\n")); yystack->yytops.yysize -= 1; } else { yystack->yytops.yystates[yyj] = yystack->yytops.yystates[yyi]; if (yyj != yyi) YYDPRINTF ((stderr, "Rename stack %d -> %d.\n", yyi, yyj)); yyj += 1; } yyi += 1; } } /** Shift to a new state on stack #K of STACK, corresponding to LR state * LRSTATE, at input position POSN, with (resolved) semantic value SVAL. */ static inline void yyglrShift (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn, YYSTYPE yysval, YYLTYPE* yylocp) { yyGLRStackItem* yynewItem; yynewItem = yystack->yynextFree; yystack->yynextFree += 1; yystack->yyspaceLeft -= 1; yynewItem->yystate.yyisState = yytrue; yynewItem->yystate.yylrState = yylrState; yynewItem->yystate.yyposn = yyposn; yynewItem->yystate.yyresolved = yytrue; yynewItem->yystate.yypred = yystack->yytops.yystates[yyk]; yystack->yytops.yystates[yyk] = &yynewItem->yystate; yynewItem->yystate.yysemantics.yysval = yysval; yynewItem->yystate.yyloc = *yylocp; if (yystack->yyspaceLeft < YYHEADROOM) yyexpandGLRStack (yystack); } /** Shift to a new state on stack #K of STACK, to a new state * corresponding to LR state LRSTATE, at input position POSN, with * the (unresolved) semantic value of RHS under the action for RULE. */ static inline void yyglrShiftDefer (yyGLRStack* yystack, int yyk, yyStateNum yylrState, size_t yyposn, yyGLRState* yyrhs, yyRuleNum yyrule) { yyGLRStackItem* yynewItem; yynewItem = yystack->yynextFree; yynewItem->yystate.yyisState = yytrue; yynewItem->yystate.yylrState = yylrState; yynewItem->yystate.yyposn = yyposn; yynewItem->yystate.yyresolved = yyfalse; yynewItem->yystate.yypred = yystack->yytops.yystates[yyk]; yynewItem->yystate.yysemantics.yyfirstVal = NULL; yystack->yytops.yystates[yyk] = &yynewItem->yystate; yystack->yynextFree += 1; yystack->yyspaceLeft -= 1; yyaddDeferredAction (yystack, &yynewItem->yystate, yyrhs, yyrule); } /** Pop the symbols consumed by reduction #RULE from the top of stack * #K of STACK, and perform the appropriate semantic action on their * semantic values. Assumes that all ambiguities in semantic values * have been previously resolved. Set *VALP to the resulting value, * and *LOCP to the computed location (if any). Return value is as * for userAction. */ static inline int yydoAction (yyGLRStack* yystack, int yyk, yyRuleNum yyrule, YYSTYPE* yyvalp, YYLTYPE* yylocp) { int yynrhs = yyrhsLength (yyrule); if (yystack->yysplitPoint == NULL) { /* Standard special case: single stack. */ yyGLRStackItem* yyrhs = (yyGLRStackItem*) yystack->yytops.yystates[yyk]; assert (yyk == 0); yystack->yynextFree -= yynrhs; yystack->yyspaceLeft += yynrhs; yystack->yytops.yystates[0] = & yystack->yynextFree[-1].yystate; if (yynrhs == 0) { *yyvalp = yyval_default; *yylocp = yyloc_default; } else { *yyvalp = yyrhs[1-yynrhs].yystate.yysemantics.yysval; *yylocp = yyrhs[1-yynrhs].yystate.yyloc; } return yyuserAction (yyrule, yynrhs, yyrhs, yyvalp, yylocp, yystack); } else { int yyi; yyGLRState* yys; yyGLRStackItem yyrhsVals[YYMAXRHS]; for (yyi = yynrhs-1, yys = yystack->yytops.yystates[yyk]; yyi >= 0; yyi -= 1, yys = yys->yypred) { assert (yys->yypred != NULL); yyrhsVals[yyi].yystate.yyresolved = yytrue; yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval; yyrhsVals[yyi].yystate.yyloc = yys->yyloc; } yyupdateSplit (yystack, yys); yystack->yytops.yystates[yyk] = yys; if (yynrhs == 0) { *yyvalp = yyval_default; *yylocp = yyloc_default; } else { *yyvalp = yyrhsVals[0].yystate.yysemantics.yysval; *yylocp = yyrhsVals[0].yystate.yyloc; } return yyuserAction (yyrule, yynrhs, yyrhsVals + (yynrhs-1), yyvalp, yylocp, yystack); } } /** Pop items off stack #K of STACK according to grammar rule RULE, * and push back on the resulting nonterminal symbol. Perform the * semantic action associated with RULE and store its value with the * newly pushed state, if FORCEEVAL or if STACK is currently * unambiguous. Otherwise, store the deferred semantic action with * the new state. If the new state would have an identical input * position, LR state, and predecessor to an existing state on the stack, * it is identified with that existing state, eliminating stack #K from * the STACK. In this case, the (necessarily deferred) semantic value is * added to the options for the existing state's semantic value. */ static inline YYRESULTTAG yyglrReduce (yyGLRStack* yystack, int yyk, yyRuleNum yyrule, bool yyforceEval) { int yyposn = yystack->yytops.yystates[yyk]->yyposn; if (yyforceEval || yystack->yysplitPoint == NULL) { YYSTYPE yysval; YYLTYPE yyloc; YYCHK (yydoAction (yystack, yyk, yyrule, &yysval, &yyloc)); yyglrShift (yystack, yyk, yyLRgotoState (yystack->yytops.yystates[yyk]->yylrState, yylhsNonterm (yyrule)), yyposn, yysval, &yyloc); YYDPRINTF ((stderr, "Reduced stack %d by rule #%d. Now in state %d.\n", yyk, yyrule-1, yystack->yytops.yystates[yyk]->yylrState)); } else { int yyi, yyn; yyGLRState* yys, *yys0 = yystack->yytops.yystates[yyk]; yyStateNum yynewLRState; for (yys = yystack->yytops.yystates[yyk], yyn = yyrhsLength (yyrule); yyn > 0; yyn -= 1) { yys = yys->yypred; assert (yys != NULL); } yyupdateSplit (yystack, yys); yynewLRState = yyLRgotoState (yys->yylrState, yylhsNonterm (yyrule)); YYDPRINTF ((stderr, "Reduced stack %d by rule #%d; action deferred. " "Now in state %d.\n", yyk, yyrule-1, yynewLRState)); for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) if (yyi != yyk && yystack->yytops.yystates[yyi] != NULL) { yyGLRState* yyp, *yysplit = yystack->yysplitPoint; yyp = yystack->yytops.yystates[yyi]; while (yyp != yys && yyp != yysplit && yyp->yyposn >= yyposn) { if (yyp->yylrState == yynewLRState && yyp->yypred == yys) { yyaddDeferredAction (yystack, yyp, yys0, yyrule); yymarkStackDeleted (yystack, yyk); YYDPRINTF ((stderr, "Merging stack %d into stack %d.\n", yyk, yyi)); return 0; } yyp = yyp->yypred; } } yystack->yytops.yystates[yyk] = yys; yyglrShiftDefer (yystack, yyk, yynewLRState, yyposn, yys0, yyrule); } return 0; } static int yysplitStack (yyGLRStack* yystack, int yyk) { if (yystack->yysplitPoint == NULL) { assert (yyk == 0); yystack->yysplitPoint = yystack->yytops.yystates[yyk]; } if (yystack->yytops.yysize >= yystack->yytops.yycapacity) { yystack->yytops.yycapacity *= 2; yystack->yytops.yystates = (yyGLRState**) realloc (yystack->yytops.yystates, yystack->yytops.yycapacity * sizeof (yyGLRState*)); } yystack->yytops.yystates[yystack->yytops.yysize] = yystack->yytops.yystates[yyk]; yystack->yytops.yysize += 1; return yystack->yytops.yysize-1; } /** True iff Y0 and Y1 represent identical options at the top level. * That is, they represent the same rule applied to RHS symbols * that produce the same terminal symbols. */ static bool yyidenticalOptions (yySemanticOption* yyy0, yySemanticOption* yyy1) { if (yyy0->yyrule == yyy1->yyrule) { yyGLRState *yys0, *yys1; int yyn; for (yys0 = yyy0->yystate, yys1 = yyy1->yystate, yyn = yyrhsLength (yyy0->yyrule); yyn > 0; yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) if (yys0->yyposn != yys1->yyposn) return yyfalse; return yytrue; } else return yyfalse; } /** Assuming identicalOptions (Y0,Y1), (destructively) merge the * alternative semantic values for the RHS-symbols of Y1 into the * corresponding semantic value sets of the symbols of Y0. */ static void yymergeOptionSets (yySemanticOption* yyy0, yySemanticOption* yyy1) { yyGLRState *yys0, *yys1; int yyn; for (yys0 = yyy0->yystate, yys1 = yyy1->yystate, yyn = yyrhsLength (yyy0->yyrule); yyn > 0; yys0 = yys0->yypred, yys1 = yys1->yypred, yyn -= 1) if (yys0 == yys1) break; else if (! yys0->yyresolved && ! yys1->yyresolved) { yySemanticOption* yyz; for (yyz = yys0->yysemantics.yyfirstVal; yyz->yynext != NULL; yyz = yyz->yynext) ; yyz->yynext = yys1->yysemantics.yyfirstVal; } } /** Y0 and Y1 represent two possible actions to take in a given * parsing state; return 0 if no combination is possible, * 1 if user-mergeable, 2 if Y0 is preferred, 3 if Y1 is preferred. */ static int yypreference (yySemanticOption* yyy0, yySemanticOption* yyy1) { yyRuleNum yyr0 = yyy0->yyrule, yyr1 = yyy1->yyrule; int yyp0 = yydprec[yyr0], yyp1 = yydprec[yyr1]; if (yyp0 == yyp1) { if (yymerger[yyr0] == 0 || yymerger[yyr0] != yymerger[yyr1]) return 0; else return 1; } if (yyp0 == 0 || yyp1 == 0) return 0; if (yyp0 < yyp1) return 3; if (yyp0 > yyp1) return 2; return 0; } static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack, YYSTYPE* yyvalp, YYLTYPE* yylocp); static YYRESULTTAG yyresolveStates (yyGLRState* yys, int yyn, yyGLRStack* yystack) { YYRESULTTAG yyflag; if (yyn > 0) { assert (yys->yypred != NULL); yyflag = yyresolveStates (yys->yypred, yyn-1, yystack); if (yyflag != yyok) return yyflag; if (! yys->yyresolved) { yyflag = yyresolveValue (yys->yysemantics.yyfirstVal, yystack, &yys->yysemantics.yysval, &yys->yyloc); if (yyflag != yyok) return yyflag; yys->yyresolved = yytrue; } } return yyok; } static YYRESULTTAG yyresolveAction (yySemanticOption* yyopt, yyGLRStack* yystack, YYSTYPE* yyvalp, YYLTYPE* yylocp) { yyGLRStackItem yyrhsVals[YYMAXRHS]; int yynrhs, yyi; yyGLRState* yys; yynrhs = yyrhsLength (yyopt->yyrule); YYCHK (yyresolveStates (yyopt->yystate, yynrhs, yystack)); for (yyi = yynrhs-1, yys = yyopt->yystate; yyi >= 0; yyi -= 1, yys = yys->yypred) { assert (yys->yypred != NULL); yyrhsVals[yyi].yystate.yyresolved = yytrue; yyrhsVals[yyi].yystate.yysemantics.yysval = yys->yysemantics.yysval; yyrhsVals[yyi].yystate.yyloc = yys->yyloc; } return yyuserAction (yyopt->yyrule, yynrhs, yyrhsVals + (yynrhs-1), yyvalp, yylocp, yystack); } #if YYDEBUG static yyGLRState YYLEFTMOST_STATE = { 0, NULL, -1, 0, { NULL } }; static void yyreportTree (yySemanticOption* yyx, int yyindent) { int yynrhs = yyrhsLength (yyx->yyrule); int yyi; yyGLRState* yys; yyGLRState* yystates[YYMAXRHS]; for (yyi = yynrhs, yys = yyx->yystate; yyi > 0; yyi -= 1, yys = yys->yypred) yystates[yyi] = yys; if (yys == NULL) yystates[0] = &YYLEFTMOST_STATE; else yystates[0] = yys; if (yys->yyposn+1 > yyx->yystate->yyposn) YYFPRINTF (stderr, "%*s%s -> \n", yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), yyx->yyrule); else YYFPRINTF (stderr, "%*s%s -> \n", yyindent, "", yytokenName (yylhsNonterm (yyx->yyrule)), yyx->yyrule, yys->yyposn+1, yyx->yystate->yyposn); for (yyi = 1; yyi <= yynrhs; yyi += 1) { if (yystates[yyi]->yyresolved) { if (yystates[yyi-1]->yyposn+1 > yystates[yyi]->yyposn) YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1])); else YYFPRINTF (stderr, "%*s%s \n", yyindent+2, "", yytokenName (yyrhs[yyprhs[yyx->yyrule]+yyi-1]), yystates[yyi-1]->yyposn+1, yystates[yyi]->yyposn); } else yyreportTree (yystates[yyi]->yysemantics.yyfirstVal, yyindent+2); } } #endif static void yyreportAmbiguity (yySemanticOption* yyx0, yySemanticOption* yyx1, yyGLRStack* yystack) { #if YYDEBUG YYFPRINTF (stderr, "Ambiguity detected.\n"); YYFPRINTF (stderr, "Option 1,\n"); yyreportTree (yyx0, 2); YYFPRINTF (stderr, "\nOption 2,\n"); yyreportTree (yyx1, 2); YYFPRINTF (stderr, "\n"); #endif yyFail (yystack, "ambiguity detected"); } /** Resolve the ambiguity represented by OPTIONLIST, perform the indicated * actions, and return the result. */ static YYRESULTTAG yyresolveValue (yySemanticOption* yyoptionList, yyGLRStack* yystack, YYSTYPE* yyvalp, YYLTYPE* yylocp) { yySemanticOption* yybest; yySemanticOption* yyp; int yymerge; yybest = yyoptionList; yymerge = 0; for (yyp = yyoptionList->yynext; yyp != NULL; yyp = yyp->yynext) { if (yyidenticalOptions (yybest, yyp)) yymergeOptionSets (yybest, yyp); else switch (yypreference (yybest, yyp)) { case 0: yyreportAmbiguity (yybest, yyp, yystack); break; case 1: yymerge = 1; break; case 2: break; case 3: yybest = yyp; yymerge = 0; break; } } if (yymerge) { int yyprec = yydprec[yybest->yyrule]; YYCHK (yyresolveAction (yybest, yystack, yyvalp, yylocp)); for (yyp = yybest->yynext; yyp != NULL; yyp = yyp->yynext) { if (yyprec == yydprec[yyp->yyrule]) { YYSTYPE yyval1; YYLTYPE yydummy; YYCHK (yyresolveAction (yyp, yystack, &yyval1, &yydummy)); *yyvalp = yyuserMerge (yymerger[yyp->yyrule], yyvalp, &yyval1); } } return yyok; } else return yyresolveAction (yybest, yystack, yyvalp, yylocp); } static YYRESULTTAG yyresolveStack (yyGLRStack* yystack) { if (yystack->yysplitPoint != NULL) { yyGLRState* yys; int yyn; for (yyn = 0, yys = yystack->yytops.yystates[0]; yys != yystack->yysplitPoint; yys = yys->yypred, yyn += 1) ; YYCHK (yyresolveStates (yystack->yytops.yystates[0], yyn, yystack)); } return yyok; } static void yycompressStack (yyGLRStack* yystack) { yyGLRState* yyp, *yyq, *yyr; if (yystack->yytops.yysize != 1 || yystack->yysplitPoint == NULL) return; for (yyp = yystack->yytops.yystates[0], yyq = yyp->yypred, yyr = NULL; yyp != yystack->yysplitPoint; yyr = yyp, yyp = yyq, yyq = yyp->yypred) yyp->yypred = yyr; yystack->yyspaceLeft += yystack->yynextFree - yystack->yyitems; yystack->yynextFree = ((yyGLRStackItem*) yystack->yysplitPoint) + 1; yystack->yyspaceLeft -= yystack->yynextFree - yystack->yyitems; yystack->yysplitPoint = NULL; yystack->yylastDeleted = NULL; while (yyr != NULL) { yystack->yynextFree->yystate = *yyr; yyr = yyr->yypred; yystack->yynextFree->yystate.yypred = & yystack->yynextFree[-1].yystate; yystack->yytops.yystates[0] = &yystack->yynextFree->yystate; yystack->yynextFree += 1; yystack->yyspaceLeft -= 1; } } static YYRESULTTAG yyprocessOneStack (yyGLRStack* yystack, int yyk, size_t yyposn, YYSTYPE* yylvalp, YYLTYPE* yyllocp) { int yyaction; const short* yyconflicts; yyRuleNum yyrule; yySymbol* const yytokenp = yystack->yytokenp; while (yystack->yytops.yystates[yyk] != NULL) { yyStateNum yystate = yystack->yytops.yystates[yyk]->yylrState; assert (yystate != YYFINAL); if (yyisDefaultedState (yystate)) { yyrule = yydefaultAction (yystate); if (yyrule == 0) { YYDPRINTF ((stderr, "Stack %d dies.\n", yyk)); yymarkStackDeleted (yystack, yyk); return yyok; } YYCHK (yyglrReduce (yystack, yyk, yyrule, yyfalse)); } else { if (*yytokenp == YYEMPTY) { yychar = YYLEX; *yytokenp = YYTRANSLATE(yychar); YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp))); } yygetLRActions (yystate, *yytokenp, &yyaction, &yyconflicts); while (*yyconflicts != 0) { int yynewStack = yysplitStack (yystack, yyk); YYDPRINTF ((stderr, "Splitting off stack %d from %d.\n", yynewStack, yyk)); YYCHK (yyglrReduce (yystack, yynewStack, *yyconflicts, yyfalse)); YYCHK (yyprocessOneStack (yystack, yynewStack, yyposn, yylvalp, yyllocp)); yyconflicts += 1; } if (yyisShiftAction (yyaction)) { YYDPRINTF ((stderr, "Shifted token %s on stack %d, ", yytokenName (*yytokenp), yyk)); yyglrShift (yystack, yyk, yyaction, yyposn+1, *yylvalp, yyllocp); YYDPRINTF ((stderr, "which is now in state #%d\n", yystack->yytops.yystates[yyk]->yylrState)); break; } else if (yyisErrorAction (yyaction)) { YYDPRINTF ((stderr, "Stack %d dies.\n", yyk)); yymarkStackDeleted (yystack, yyk); break; } else YYCHK (yyglrReduce (yystack, yyk, -yyaction, yyfalse)); } } return yyok; } static void yyreportParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp) { yySymbol* const yytokenp = yystack->yytokenp; if (yystack->yyerrState == 0) { #if YYERROR_VERBOSE int yyn, yyx, yycount, yysize; char* yyprefix; char* yyp; char* yymsg; yyn = yypact[yystack->yytops.yystates[0]->yylrState]; if (yyn > YYFLAG && yyn < YYLAST) { yycount = 0; /* Start YYX at -YYN if negative to avoid negative indexes in YYCHECK. */ yysize = sizeof ("parse error, unexpected ") + strlen (yytokenName (*yytokenp)); yyprefix = ", expecting "; for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size && yycount <= 5; yyx += 1) if (yycheck[yyx + yyn] == yyx) yysize += strlen (yytokenName (yyx)) + strlen (yyprefix), yycount += 1, yyprefix = " or "; yymsg = yyp = (char*) malloc (yysize); yyp += sprintf (yyp, "parse error, unexpected %s", yytokenName (*yytokenp)); if (yycount < 5) { yyprefix = ", expecting "; for (yyx = yyn < 0 ? -yyn : 0; yyx < yytname_size; yyx += 1) if (yycheck[yyx + yyn] == yyx) { yyp += sprintf (yyp, "%s%s", yyprefix, yytokenName (yyx)); yyprefix = " or "; } } yyerror (yymsg); free (yymsg); } else #endif yyerror ("parse error"); yynerrs += 1; } } /* Recover from a syntax error on STACK, assuming that TOKENP, YYLVALP, and YYLLOCP point to the syntactic category, semantic value, and location of the lookahead. NOTE: This uses the panic-mode recovery algorithm described in the Bison documentation, which differs from what is in bison.simple. Specifically, this routine performs no reductions before shifting the error token. */ static void yyrecoverParseError (yyGLRStack* yystack, YYSTYPE* yylvalp, YYLTYPE* yyllocp) { yySymbol* const yytokenp = yystack->yytokenp; int yyk, yyj; if (yystack->yyerrState == 0) yystack->yyerrState = 3; else if (yystack->yyerrState == 3) { /* We just shifted the error token and (perhaps) took some reductions. Skip tokens until we can proceed. */ do { if (*yytokenp == YYEOF) yyFail (yystack, NULL); if (*yytokenp != YYEMPTY) YYDPRINTF ((stderr, "Discarding token %s\n", yytokenName (*yytokenp))); yychar = YYLEX; *yytokenp = YYTRANSLATE (yychar); YYDPRINTF ((stderr, "Read token %s\n", yytokenName (*yytokenp))); yyj = yypact[yystack->yytops.yystates[0]->yylrState]; if (yyj == YYFLAG) /* Something's not right; we shouldn't be here */ yyFail (yystack, NULL); yyj += *yytokenp; if (yyj < 0 || yyj > YYLAST || yycheck[yyj] != *yytokenp) { if (yydefact[yystack->yytops.yystates[0]->yylrState] != 0) return; } else if (yytable[yyj] != 0 && yytable[yyj] != YYFLAG) return; } while (yytrue); } /* Reduce to one stack */ for (yyk = 0; yyk < yystack->yytops.yysize; yyk += 1) if (yystack->yytops.yystates[yyk] != NULL) break; if (yyk >= yystack->yytops.yysize) yyFail (yystack, NULL); for (yyk += 1; yyk < yystack->yytops.yysize; yyk += 1) yymarkStackDeleted (yystack, yyk); yyremoveDeletes (yystack); yycompressStack (yystack); /* Now pop stack until we find a state that shifts the error token. */ while (yystack->yytops.yystates[0] != NULL) { yyj = yypact[yystack->yytops.yystates[0]->yylrState] + YYTERROR; if (yyj != YYFLAG + YYTERROR && yyj >= 0 && yyj <= YYLAST && yycheck[yyj] == YYTERROR && yyisShiftAction (yytable[yyj])) { yyglrShift (yystack, 0, yytable[yyj], yystack->yytops.yystates[0]->yyposn, *yylvalp, yyllocp); break; } yystack->yytops.yystates[0] = yystack->yytops.yystates[0]->yypred; yystack->yynextFree -= 1; yystack->yyspaceLeft += 1; } if (yystack->yytops.yystates[0] == NULL) yyFail (yystack, NULL); } #define YYCHK1(YYE) \ do { \ switch (YYE) { \ default: \ break; \ case yyabort: \ yystack.yyerrflag = 1; \ goto yyDone; \ case yyaccept: \ yystack.yyerrflag = 0; \ goto yyDone; \ case yyerr: \ goto yyuser_error; \ } \ } while (0) int yyparse (YYPARSE_PARAM_ARG) { yySymbol yytoken; yyGLRStack yystack; size_t yyposn; ]b4_pure_if( [ YYSTYPE yylval; YYLTYPE yylloc; #undef yychar #define yychar (yystack.yyrawchar) ])[ YYSTYPE* const yylvalp = &yylval; YYLTYPE* const yyllocp = &yylloc; yyinitGLRStack (&yystack, YYINITDEPTH); yystack.yytokenp = &yytoken; if (setjmp (yystack.yyexception_buffer) != 0) goto yyDone; yyglrShift (&yystack, 0, 0, 0, yyval_default, &yyloc_default); yytoken = YYEMPTY; yyposn = 0; while (yytrue) { /* For efficiency, we have two loops, of which the first of which * is specialized to deterministic operation (single stack, no * potential ambiguity). */ /* Standard mode */ while (yytrue) { yyRuleNum yyrule; int yyaction; const short* yyconflicts; yyStateNum yystate = yystack.yytops.yystates[0]->yylrState; if (yystate == YYFINAL) goto yyDone; if (yyisDefaultedState (yystate)) { yyrule = yydefaultAction (yystate); if (yyrule == 0) { yyreportParseError (&yystack, yylvalp, yyllocp); goto yyuser_error; } YYCHK1 (yyglrReduce (&yystack, 0, yyrule, yytrue)); } else { if (yytoken == YYEMPTY) { yychar = YYLEX; yytoken = YYTRANSLATE (yychar); YYDPRINTF ((stderr, "Read token %s\n", yytokenName (yytoken))); } yygetLRActions (yystate, yytoken, &yyaction, &yyconflicts); if (*yyconflicts != 0) break; if (yyisShiftAction (yyaction)) { YYDPRINTF ((stderr, "Shifted token %s. ", yytokenName (yytoken))); if (yytoken != YYEOF) yytoken = YYEMPTY; yyposn += 1; yyglrShift (&yystack, 0, yyaction, yyposn, yylval, yyllocp); if (yystack.yyerrState > 0) yystack.yyerrState -= 1; YYDPRINTF ((stderr, "Now in state #%d\n", yystack.yytops.yystates[0]->yylrState)); } else if (yyisErrorAction (yyaction)) { yyreportParseError (&yystack, yylvalp, yyllocp); goto yyuser_error; } else YYCHK1 (yyglrReduce (&yystack, 0, -yyaction, yytrue)); } } while (yytrue) { int yys; int yyn = yystack.yytops.yysize; for (yys = 0; yys < yyn; yys += 1) YYCHK1 (yyprocessOneStack (&yystack, yys, yyposn, yylvalp, yyllocp)); yytoken = YYEMPTY; yyposn += 1; yyremoveDeletes (&yystack); if (yystack.yytops.yysize == 0) { yyundeleteLastStack (&yystack); if (yystack.yytops.yysize == 0) yyFail (&yystack, "parse error"); YYCHK1 (yyresolveStack (&yystack)); YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); yyreportParseError (&yystack, yylvalp, yyllocp); goto yyuser_error; } else if (yystack.yytops.yysize == 1) { YYCHK1 (yyresolveStack (&yystack)); YYDPRINTF ((stderr, "Returning to deterministic operation.\n")); yycompressStack (&yystack); break; } } continue; yyuser_error: yyrecoverParseError (&yystack, yylvalp, yyllocp); yyposn = yystack.yytops.yystates[0]->yyposn; } yyDone: ; yyfreeGLRStack (&yystack); return yystack.yyerrflag; } /* DEBUGGING ONLY */ void yypstates (yyGLRState* yyst) { void yy_yypstack (yyGLRState* yys) { if (yys->yypred == NULL) fprintf (stderr, "%d@%d", yys->yylrState, yys->yyposn); else { yy_yypstack (yys->yypred); fprintf (stderr, " -> %d@%d", yys->yylrState, yys->yyposn); } } if (yyst == NULL) fprintf (stderr, ""); else yy_yypstack (yyst); fprintf (stderr, "\n"); } void yypstack (yyGLRStack* yystack, int yyk) { yypstates (yystack->yytops.yystates[yyk]); } #define YYINDEX(YYX) \ ((YYX) == NULL ? -1 : (yyGLRStackItem*) (YYX) - yystack->yyitems) void yypdumpstack (yyGLRStack* yystack) { yyGLRStackItem* yyp; int yyi; for (yyp = yystack->yyitems; yyp < yystack->yynextFree; yyp += 1) { fprintf (stderr, "%3d. ", yyp - yystack->yyitems); if (*(bool*) yyp) { fprintf (stderr, "Res: %d, LR State: %d, posn: %d, pred: %d", yyp->yystate.yyresolved, yyp->yystate.yylrState, yyp->yystate.yyposn, YYINDEX(yyp->yystate.yypred)); if (! yyp->yystate.yyresolved) fprintf (stderr, ", firstVal: %d", YYINDEX (yyp->yystate.yysemantics.yyfirstVal)); } else { fprintf (stderr, "Option. rule: %d, state: %d, next: %d", yyp->yyoption.yyrule, YYINDEX (yyp->yyoption.yystate), YYINDEX (yyp->yyoption.yynext)); } fprintf (stderr, "\n"); } fprintf (stderr, "Tops:"); for (yyi = 0; yyi < yystack->yytops.yysize; yyi += 1) fprintf (stderr, "%d: %d; ", yyi, YYINDEX (yystack->yytops.yystates[yyi])); fprintf (stderr, "\n"); } ] b4_epilogue m4_if(b4_defines_flag, 0, [], [#output "b4_output_header_name" #ifndef b4_header_guard # define b4_header_guard b4_token_defines(b4_tokens) #ifndef YYSTYPE m4_ifdef([b4_stype], [#line b4_stype_line "b4_filename" typedef union b4_stype yystype; /* Line __line__ of __file__. */ #line __oline__ "__ofile__"], [typedef int yystype;]) # define YYSTYPE yystype #endif b4_pure_if([], [extern YYSTYPE b4_prefix[]lval;]) b4_location_if( [#ifndef YYLTYPE typedef struct yyltype { int yyfirst_line; int yyfirst_column; int yylast_line; int yylast_column; } yyltype; # define YYLTYPE yyltype #endif m4_if(b4_pure, [0], [extern YYLTYPE b4_prefix[]lloc;]) ]) #endif /* not b4_header_guard */ ])