X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b07b484a4134c16d1f4ad5159d72df63ec60c346..71da9eeacc05af817ae0eb2d905d74e774aa842d:/src/bison.simple diff --git a/src/bison.simple b/src/bison.simple index 76f87692..a0c6b8a9 100644 --- a/src/bison.simple +++ b/src/bison.simple @@ -1,5 +1,5 @@ /* -*-C-*- Note some compilers choke on comments on `#line' lines. */ -#line 3 "bison.simple" +#line /* This file comes from bison-@bison_version@. */ /* Skeleton output parser for bison, @@ -25,10 +25,10 @@ This special exception was added by the Free Software Foundation in version 1.24 of Bison. */ -/* This is the parser code that is written into each bison parser - when the %semantic_parser declaration is not specified in the grammar. - It was written by Richard Stallman by simplifying the hairy parser - used when %semantic_parser is specified. */ +/* This is the parser code that is written into each bison parser when + the %semantic_parser declaration is not specified in the grammar. + It was written by Richard Stallman by simplifying the hairy parser + used when %semantic_parser is specified. */ #ifndef YYSTACK_USE_ALLOCA # ifdef alloca @@ -91,67 +91,80 @@ #define YYACCEPT goto yyacceptlab #define YYABORT goto yyabortlab #define YYERROR goto yyerrlab1 -/* Like YYERROR except do call yyerror. - This remains here temporarily to ease the - transition to the new meaning of YYERROR, for GCC. +/* Like YYERROR except do call yyerror. This remains here temporarily + to ease the transition to the new meaning of YYERROR, for GCC. Once GCC version 2 has supplanted version 1, this can go. */ #define YYFAIL goto yyerrlab #define YYRECOVERING() (!!yyerrstatus) -#define YYBACKUP(token, value) \ +#define YYBACKUP(Token, Value) \ do \ if (yychar == YYEMPTY && yylen == 1) \ - { yychar = (token), yylval = (value); \ + { \ + yychar = (Token); \ + yylval = (Value); \ yychar1 = YYTRANSLATE (yychar); \ YYPOPSTACK; \ goto yybackup; \ } \ else \ - { yyerror ("syntax error: cannot back up"); YYERROR; } \ + { \ + yyerror ("syntax error: cannot back up"); \ + YYERROR; \ + } \ while (0) #define YYTERROR 1 #define YYERRCODE 256 #ifndef YYPURE -# define YYLEX yylex() +# define YYLEX yylex () #endif #ifdef YYPURE # ifdef YYLSP_NEEDED # ifdef YYLEX_PARAM -# define YYLEX yylex(&yylval, &yylloc, YYLEX_PARAM) +# define YYLEX yylex (&yylval, &yylloc, YYLEX_PARAM) # else -# define YYLEX yylex(&yylval, &yylloc) +# define YYLEX yylex (&yylval, &yylloc) # endif -# else /* not YYLSP_NEEDED */ +# else /* !YYLSP_NEEDED */ # ifdef YYLEX_PARAM -# define YYLEX yylex(&yylval, YYLEX_PARAM) +# define YYLEX yylex (&yylval, YYLEX_PARAM) # else -# define YYLEX yylex(&yylval) +# define YYLEX yylex (&yylval) # endif -# endif /* not YYLSP_NEEDED */ +# endif /* !YYLSP_NEEDED */ #endif -/* If nonreentrant, generate the variables here */ +/* If nonreentrant, generate the variables here. */ #ifndef YYPURE +/* The lookahead symbol. */ +int yychar; -int yychar; /* the lookahead symbol */ -YYSTYPE yylval; /* the semantic value of the */ - /* lookahead symbol */ +/* The semantic value of the lookahead symbol. */ +YYSTYPE yylval; # ifdef YYLSP_NEEDED -YYLTYPE yylloc; /* location data for the lookahead */ - /* symbol */ +/* Location data for the lookahead symbol. */ +YYLTYPE yylloc; # endif -int yynerrs; /* number of parse errors so far */ -#endif /* not YYPURE */ +/* Number of parse errors so far. */ +int yynerrs; +#endif /* !YYPURE */ + -#if YYDEBUG != 0 +#if YYDEBUG int yydebug; /* nonzero means print parse trace */ -/* Since this is uninitialized, it does not stop multiple parsers - from coexisting. */ + + /* [The following comment makes no sense to me. Could someone + clarify it? --akim] Since this is uninitialized, it does not + stop multiple parsers from coexisting. */ +#else + /* To avoid crippling this file with `#if YYDEBUG', define `yydebug' + as `0', so that the `if (yydebug)' be removed as dead code. */ +# define yydebug 0 #endif /* YYINITDEPTH indicates the initial size of the parser's stacks */ @@ -177,7 +190,7 @@ int yydebug; /* nonzero means print parse trace */ of type size_t, but it can handle unsigned int. */ #if __GNUC__ > 1 /* GNU C and GNU C++ define this. */ -# define __yy_memcpy(TO,FROM,COUNT) __builtin_memcpy(TO,FROM,COUNT) +# define __yy_memcpy(To,From,Count) __builtin_memcpy (To,From,Count) #else /* not GNU C or C++ */ # ifndef __cplusplus @@ -215,7 +228,7 @@ __yy_memcpy (char *to, char *from, unsigned int count) # endif #endif -#line 217 "bison.simple" +#line /* The user can define YYPARSE_PARAM as the name of an argument to be passed into yyparse. The argument should have type void *. @@ -227,14 +240,14 @@ __yy_memcpy (char *to, char *from, unsigned int count) # ifdef __cplusplus # define YYPARSE_PARAM_ARG void *YYPARSE_PARAM # define YYPARSE_PARAM_DECL -# else /* not __cplusplus */ +# else /* !__cplusplus */ # define YYPARSE_PARAM_ARG YYPARSE_PARAM # define YYPARSE_PARAM_DECL void *YYPARSE_PARAM; -# endif /* not __cplusplus */ -#else /* not YYPARSE_PARAM */ +# endif /* !__cplusplus */ +#else /* !YYPARSE_PARAM */ # define YYPARSE_PARAM_ARG # define YYPARSE_PARAM_DECL -#endif /* not YYPARSE_PARAM */ +#endif /* !YYPARSE_PARAM */ /* Prevent warning if -Wstrict-prototypes. */ #ifdef __GNUC__ @@ -246,34 +259,42 @@ int yyparse (void); #endif int -yyparse(YYPARSE_PARAM_ARG) +yyparse (YYPARSE_PARAM_ARG) YYPARSE_PARAM_DECL { register int yystate; register int yyn; - register short *yyssp; - register YYSTYPE *yyvsp; /* Number of tokens to shift before error messages enabled. */ int yyerrstatus; /* Lookahead token as an internal (translated) token number. */ int yychar1 = 0; + /* Three stacks and their tools: + `yyss': related to states, + `yysv': related to semantic values, + `yyls': related to locations. + + Refer to the stacks thru separate pointers, to allow yyoverflow + to reallocate them elsewhere. */ + /* The state stack. */ short yyssa[YYINITDEPTH]; + short *yyss = yyssa; + register short *yyssp; + /* The semantic value stack. */ YYSTYPE yyvsa[YYINITDEPTH]; - - /* Refer to the stacks thru separate pointers. */ - short *yyss = yyssa; - /* To allow yyoverflow to reallocate them elsewhere. */ YYSTYPE *yyvs = yyvsa; + register YYSTYPE *yyvsp; #ifdef YYLSP_NEEDED /* The location stack. */ YYLTYPE yylsa[YYINITDEPTH]; YYLTYPE *yyls = yylsa; YYLTYPE *yylsp; +#endif +#ifdef YYLSP_NEEDED # define YYPOPSTACK (yyvsp--, yyssp--, yylsp--) #else # define YYPOPSTACK (yyvsp--, yyssp--) @@ -291,16 +312,20 @@ yyparse(YYPARSE_PARAM_ARG) # endif #endif - YYSTYPE yyval; /* the variable used to return */ - /* semantic values from the action */ - /* routines */ + /* The variables used to return semantic value and location from the + action routines. */ + YYSTYPE yyval; +# ifdef YYLSP_NEEDED + YYLTYPE yyloc; +# endif + + /* When reducing, the number of symbols on the RHS of the reduced + rule. */ int yylen; -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Starting parse\n"); -#endif + fprintf (stderr, "Starting parse\n"); yystate = 0; yyerrstatus = 0; @@ -318,17 +343,21 @@ yyparse(YYPARSE_PARAM_ARG) yylsp = yyls; #endif -/* Push a new state, which is found in yystate . */ -/* In all cases, when you get here, the value and location stacks - have just been pushed. so pushing a state here evens the stacks. */ -yynewstate: +/*------------------------------------------------------------. +| yynewstate -- Push a new state, which is found in yystate. | +`------------------------------------------------------------*/ +yynewstate: + /* In all cases, when you get here, the value and location stacks + have just been pushed. so pushing a state here evens the stacks. + */ *++yyssp = yystate; if (yyssp >= yyss + yystacksize - 1) { - /* Give user a chance to reallocate the stack */ - /* Use copies of these so that the &'s don't force the real ones into memory. */ + /* Give user a chance to reallocate the stack. Use copies of + these so that the &'s don't force the real ones into memory. + */ YYSTYPE *yyvs1 = yyvs; short *yyss1 = yyss; #ifdef YYLSP_NEEDED @@ -344,16 +373,16 @@ yynewstate: # ifdef YYLSP_NEEDED /* This used to be a conditional around just the two extra args, but that might be undefined if yyoverflow is a macro. */ - yyoverflow("parser stack overflow", - &yyss1, size * sizeof (*yyssp), - &yyvs1, size * sizeof (*yyvsp), - &yyls1, size * sizeof (*yylsp), - &yystacksize); + yyoverflow ("parser stack overflow", + &yyss1, size * sizeof (*yyssp), + &yyvs1, size * sizeof (*yyvsp), + &yyls1, size * sizeof (*yylsp), + &yystacksize); # else - yyoverflow("parser stack overflow", - &yyss1, size * sizeof (*yyssp), - &yyvs1, size * sizeof (*yyvsp), - &yystacksize); + yyoverflow ("parser stack overflow", + &yyss1, size * sizeof (*yyssp), + &yyvs1, size * sizeof (*yyvsp), + &yystacksize); # endif yyss = yyss1; yyvs = yyvs1; @@ -364,7 +393,7 @@ yynewstate: /* Extend the stack our own way. */ if (yystacksize >= YYMAXDEPTH) { - yyerror("parser stack overflow"); + yyerror ("parser stack overflow"); if (yyfree_stacks) { free (yyss); @@ -400,22 +429,23 @@ yynewstate: yylsp = yyls + size - 1; #endif -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Stack size increased to %d\n", yystacksize); -#endif + fprintf (stderr, "Stack size increased to %d\n", yystacksize); if (yyssp >= yyss + yystacksize - 1) YYABORT; } -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Entering state %d\n", yystate); -#endif + fprintf (stderr, "Entering state %d\n", yystate); goto yybackup; - yybackup: + + +/*-----------. +| yybackup. | +`-----------*/ +yybackup: /* Do appropriate processing given the current state. */ /* Read a lookahead token if we need one and don't already have one. */ @@ -434,10 +464,8 @@ yynewstate: if (yychar == YYEMPTY) { -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Reading a token: "); -#endif + fprintf (stderr, "Reading a token: "); yychar = YYLEX; } @@ -448,21 +476,21 @@ yynewstate: yychar1 = 0; yychar = YYEOF; /* Don't call YYLEX any more */ -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Now at end of input.\n"); -#endif + fprintf (stderr, "Now at end of input.\n"); } else { - yychar1 = YYTRANSLATE(yychar); + yychar1 = YYTRANSLATE (yychar); -#if YYDEBUG != 0 +#if YYDEBUG + /* We have to keep this `#if YYDEBUG', since we use variables + which are defined only if `YYDEBUG' is set. */ if (yydebug) { fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]); - /* Give the individual parser a way to print the precise meaning - of a token, for further debugging info. */ + /* Give the individual parser a way to print the precise + meaning of a token, for further debugging info. */ # ifdef YYPRINT YYPRINT (stderr, yychar, yylval); # endif @@ -498,10 +526,9 @@ yynewstate: YYACCEPT; /* Shift the lookahead token. */ - -#if YYDEBUG != 0 +#if YYDEBUG if (yydebug) - fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]); + fprintf (stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]); #endif /* Discard the token being shifted unless it is eof. */ @@ -513,26 +540,56 @@ yynewstate: *++yylsp = yylloc; #endif - /* count tokens shifted since error; after three, turn off error status. */ - if (yyerrstatus) yyerrstatus--; + /* Count tokens shifted since error; after three, turn off error + status. */ + if (yyerrstatus) + yyerrstatus--; yystate = yyn; goto yynewstate; -/* Do the default action for the current state. */ -yydefault: +/*-----------------------------------------------------------. +| yydefault -- do the default action for the current state. | +`-----------------------------------------------------------*/ +yydefault: yyn = yydefact[yystate]; if (yyn == 0) goto yyerrlab; + goto yyreduce; -/* Do a reduction. yyn is the number of a rule to reduce with. */ + +/*-----------------------------. +| yyreduce -- Do a reduction. | +`-----------------------------*/ yyreduce: + /* yyn is the number of a rule to reduce with. */ yylen = yyr2[yyn]; + /* Implement default value of the action: + `{dollar}{dollar} = {dollar}1'. */ + if (yylen > 0) + yyval = yyvsp[1-yylen]; +#ifdef YYLSP_NEEDED + /* Implement default location. If the rhs is empty, extend YYLOC to + YYLLOC, which corresponds to the current token, otherwise + implement `@{dollar} = Starts at @1, ends at @YYLEN'. */ if (yylen > 0) - yyval = yyvsp[1-yylen]; /* implement default value of the action */ + { + yyloc = yylsp[1-yylen]; + yyloc.last_line = yylsp[0].last_line; + yyloc.last_column = yylsp[0].last_column; + } + else + { + yyloc.last_line = yylsp[0].last_line; + yyloc.last_column = yylsp[0].last_column; + yyloc.text = 0; + } +#endif -#if YYDEBUG != 0 +#if YYDEBUG + /* We have to keep this `#if YYDEBUG', since we use variables which + are defined only if `YYDEBUG' is set. */ if (yydebug) { int i; @@ -546,9 +603,8 @@ yyreduce: fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]); } #endif - -$ /* the action file gets copied in in place of this dollarsign */ -#line 543 "bison.simple" +$ /* The action file replaces this line marked with this dollarsign. */ +#line yyvsp -= yylen; yyssp -= yylen; @@ -556,7 +612,6 @@ $ /* the action file gets copied in in place of this dollarsign */ yylsp -= yylen; #endif -#if YYDEBUG != 0 if (yydebug) { short *ssp1 = yyss - 1; @@ -565,31 +620,15 @@ $ /* the action file gets copied in in place of this dollarsign */ fprintf (stderr, " %d", *++ssp1); fprintf (stderr, "\n"); } -#endif *++yyvsp = yyval; - #ifdef YYLSP_NEEDED - yylsp++; - if (yylen == 0) - { - yylsp->first_line = yylloc.first_line; - yylsp->first_column = yylloc.first_column; - yylsp->last_line = (yylsp-1)->last_line; - yylsp->last_column = (yylsp-1)->last_column; - yylsp->text = 0; - } - else - { - yylsp->last_line = (yylsp+yylen-1)->last_line; - yylsp->last_column = (yylsp+yylen-1)->last_column; - } + *++yylsp = yyloc; #endif - /* Now "shift" the result of the reduction. - Determine what state that goes to, - based on the state we popped back to - and the rule number reduced by. */ + /* Now `shift' the result of the reduction. Determine what state + that goes to, based on the state we popped back to and the rule + number reduced by. */ yyn = yyr1[yyn]; @@ -601,10 +640,13 @@ $ /* the action file gets copied in in place of this dollarsign */ goto yynewstate; -yyerrlab: /* here on detecting error */ - if (! yyerrstatus) - /* If not already recovering from an error, report this error. */ +/*------------------------------------. +| yyerrlab -- here on detecting error | +`------------------------------------*/ +yyerrlab: + /* If not already recovering from an error, report this error. */ + if (!yyerrstatus) { ++yynerrs; @@ -620,83 +662,101 @@ yyerrlab: /* here on detecting error */ count = 0; /* Start X at -yyn if nec to avoid negative indexes in yycheck. */ for (x = (yyn < 0 ? -yyn : 0); - x < (sizeof(yytname) / sizeof(char *)); x++) + x < (sizeof (yytname) / sizeof (char *)); x++) if (yycheck[x + yyn] == x) - size += strlen(yytname[x]) + 15, count++; - msg = (char *) malloc(size + 15); + size += strlen (yytname[x]) + 15, count++; + size += strlen ("parse error, unexpected `") + 1; + size += strlen (yytname[YYTRANSLATE (yychar)]); + msg = (char *) malloc (size); if (msg != 0) { - strcpy(msg, "parse error"); + strcpy (msg, "parse error, unexpected `"); + strcat (msg, yytname[YYTRANSLATE (yychar)]); + strcat (msg, "'"); if (count < 5) { count = 0; for (x = (yyn < 0 ? -yyn : 0); - x < (sizeof(yytname) / sizeof(char *)); x++) + x < (sizeof (yytname) / sizeof (char *)); x++) if (yycheck[x + yyn] == x) { - strcat(msg, count == 0 ? ", expecting `" : " or `"); - strcat(msg, yytname[x]); - strcat(msg, "'"); + strcat (msg, count == 0 ? ", expecting `" : " or `"); + strcat (msg, yytname[x]); + strcat (msg, "'"); count++; } } - yyerror(msg); - free(msg); + yyerror (msg); + free (msg); } else yyerror ("parse error; also virtual memory exceeded"); } else #endif /* YYERROR_VERBOSE */ - yyerror("parse error"); + yyerror ("parse error"); } - goto yyerrlab1; -yyerrlab1: /* here on error raised explicitly by an action */ + +/*--------------------------------------------------. +| yyerrlab1 -- error raised explicitly by an action | +`--------------------------------------------------*/ +yyerrlab1: if (yyerrstatus == 3) { - /* if just tried and failed to reuse lookahead token after an error, discard it. */ + /* If just tried and failed to reuse lookahead token after an + error, discard it. */ /* return failure if at end of input */ if (yychar == YYEOF) YYABORT; - -#if YYDEBUG != 0 +#if YYDEBUG if (yydebug) - fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]); + fprintf (stderr, "Discarding token %d (%s).\n", + yychar, yytname[yychar1]); #endif - yychar = YYEMPTY; } - /* Else will try to reuse lookahead token - after shifting the error token. */ + /* Else will try to reuse lookahead token after shifting the error + token. */ yyerrstatus = 3; /* Each real token shifted decrements this */ goto yyerrhandle; -yyerrdefault: /* current state does not do anything special for the error token. */ +/*-------------------------------------------------------------------. +| yyerrdefault -- current state does not do anything special for the | +| error token. | +`-------------------------------------------------------------------*/ +yyerrdefault: #if 0 /* This is wrong; only states that explicitly want error tokens should shift them. */ - yyn = yydefact[yystate]; /* If its default is to accept any token, ok. Otherwise pop it.*/ - if (yyn) goto yydefault; + + /* If its default is to accept any token, ok. Otherwise pop it. */ + yyn = yydefact[yystate]; + if (yyn) + goto yydefault; #endif -yyerrpop: /* pop the current state because it cannot handle the error token */ - if (yyssp == yyss) YYABORT; +/*---------------------------------------------------------------. +| yyerrpop -- pop the current state because it cannot handle the | +| error token | +`---------------------------------------------------------------*/ +yyerrpop: + if (yyssp == yyss) + YYABORT; yyvsp--; yystate = *--yyssp; #ifdef YYLSP_NEEDED yylsp--; #endif -#if YYDEBUG != 0 if (yydebug) { short *ssp1 = yyss - 1; @@ -705,10 +765,12 @@ yyerrpop: /* pop the current state because it cannot handle the error token */ fprintf (stderr, " %d", *++ssp1); fprintf (stderr, "\n"); } -#endif -yyerrhandle: +/*--------------. +| yyerrhandle. | +`--------------*/ +yyerrhandle: yyn = yypact[yystate]; if (yyn == YYFLAG) goto yyerrdefault; @@ -731,10 +793,8 @@ yyerrhandle: if (yyn == YYFINAL) YYACCEPT; -#if YYDEBUG != 0 if (yydebug) - fprintf(stderr, "Shifting error token, "); -#endif + fprintf (stderr, "Shifting error token, "); *++yyvsp = yylval; #ifdef YYLSP_NEEDED @@ -744,8 +804,11 @@ yyerrhandle: yystate = yyn; goto yynewstate; - yyacceptlab: - /* YYACCEPT comes here. */ + +/*-------------------------------------. +| yyacceptlab -- YYACCEPT comes here. | +`-------------------------------------*/ +yyacceptlab: if (yyfree_stacks) { free (yyss); @@ -756,8 +819,11 @@ yyerrhandle: } return 0; - yyabortlab: - /* YYABORT comes here. */ + +/*-----------------------------------. +| yyabortlab -- YYABORT comes here. | +`-----------------------------------*/ +yyabortlab: if (yyfree_stacks) { free (yyss);