X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/93d0103dd443300312c57577040c135b79b85b26..c50befe6152b25faa8d872d3ac97812e1ae85f43:/data/yacc.c diff --git a/data/yacc.c b/data/yacc.c index be97f7fe..4274673d 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, 2000-2010 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 @@ -217,8 +217,7 @@ 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])[ + [1984, 1989-1990, 2000-2010])[ /* C LALR(1) parser skeleton written by Richard Stallman, by simplifying the original so-called "semantic" parser. */ @@ -373,7 +372,7 @@ 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) @@ -677,9 +676,18 @@ 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) @@ -689,7 +697,6 @@ do \ { \ yychar = (Token); \ yylval = (Value); \ - yytoken = YYTRANSLATE (yychar); \ YYPOPSTACK (1); \ goto yybackup; \ } \ @@ -728,7 +735,7 @@ while (YYID (0)) YYRHSLOC (Rhs, 0).last_column; \ } \ while (YYID (0)) -#endif +#endif]b4_locations_if([[ /* YY_LOCATION_PRINT -- Print the location on the stream. @@ -736,7 +743,7 @@ 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 YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL # define YY_LOCATION_PRINT(File, Loc) \ fprintf (File, "%d.%d-%d.%d", \ (Loc).first_line, (Loc).first_column, \ @@ -744,7 +751,14 @@ 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. */ @@ -955,50 +969,32 @@ 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 while in state YYSTATE. + + Return 0 if *YYMSG was successfully written. Return 1 if an ordinary + "syntax error" message will suffice instead. Return 2 if *YYMSG is + not large enough to hold the message. In the last case, also set + *YYMSG_ALLOC to either (a) the required number of bytes or (b) zero + if the required number of bytes is too large to store. */ +static int +yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg, + int yystate, int yytoken) { int yyn = yypact[yystate]; if (! (YYPACT_NINF < yyn && yyn <= YYLAST)) - return 0; + return 1; else { - int yytype = YYTRANSLATE (yychar); - YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]); + YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]); YYSIZE_T yysize = yysize0; YYSIZE_T yysize1; - int yysize_overflow = 0; enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + /* Internationalized format string. */ + const char *yyformat = 0; + /* Arguments of yyformat. */ 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 @@ -1008,10 +1004,12 @@ yysyntax_error (char *yyresult, int yystate, int yychar) /* Stay within bounds of both yycheck and yytname. */ int yychecklim = YYLAST - yyn + 1; int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yycount = 1; + /* Number of reported tokens (one for the "unexpected", one per + "expected"). */ + int yycount = 0; + int yyx; - yyarg[0] = yytname[yytype]; - yyfmt = yystpcpy (yyformat, yyunexpected); + yyarg[yycount++] = yytname[yytoken]; for (yyx = yyxbegin; yyx < yyxend; ++yyx) if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR @@ -1021,47 +1019,71 @@ yysyntax_error (char *yyresult, int yystate, int yychar) { yycount = 1; yysize = yysize0; - yyformat[sizeof yyunexpected - 1] = '\0'; break; } yyarg[yycount++] = yytname[yyx]; yysize1 = yysize + yytnamerr (0, yytname[yyx]); - yysize_overflow |= (yysize1 < yysize); + if (! (yysize <= yysize1 + && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) + { + /* Overflow. */ + *yymsg_alloc = 0; + return 2; + } yysize = yysize1; - yyfmt = yystpcpy (yyfmt, yyprefix); - yyprefix = yyor; } - yyf = YY_(yyformat); - yysize1 = yysize + yystrlen (yyf); - yysize_overflow |= (yysize1 < yysize); + switch (yycount) + { +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +#undef YYCASE_ + } + + yysize1 = yysize + yystrlen (yyformat); + if (! (yysize <= yysize1 && yysize1 <= YYSTACK_ALLOC_MAXIMUM)) + { + /* Overflow. */ + *yymsg_alloc = 0; + return 2; + } yysize = yysize1; - if (yysize_overflow) - return YYSIZE_MAXIMUM; + if (*yymsg_alloc < yysize) + { + *yymsg_alloc = 2 * yysize; + if (! (yysize <= *yymsg_alloc + && *yymsg_alloc <= YYSTACK_ALLOC_MAXIMUM)) + *yymsg_alloc = YYSTACK_ALLOC_MAXIMUM; + return 2; + } - 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; + /* 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 */ @@ -1250,7 +1272,7 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ yyvsp = yyvs;]b4_locations_if([[ yylsp = yyls; -#if YYLTYPE_IS_TRIVIAL +#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL /* Initialize the default location before parsing starts. */ yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[; yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[; @@ -1471,6 +1493,17 @@ yyreduce: ]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 +1532,10 @@ 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 = YYTRANSLATE (yychar); + /* If not already recovering from an error, report this error. */ if (!yyerrstatus) { @@ -1506,37 +1543,28 @@ yyerrlab: #if ! YYERROR_VERBOSE yyerror (]b4_yyerror_args[YY_("syntax error")); #else - { - 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; - } - } + while (1) + { + int yysyntax_error_status = + yysyntax_error (&yymsg_alloc, &yymsg, yystate, yytoken); + if (yysyntax_error_status == 2 && 0 < yymsg_alloc) + { + if (yymsg != yymsgbuf) + YYSTACK_FREE (yymsg); + yymsg = (char *) YYSTACK_ALLOC (yymsg_alloc); + if (yymsg) + continue; + yymsg = yymsgbuf; + yymsg_alloc = sizeof yymsgbuf; + } + if (yysyntax_error_status == 0) + yyerror (]b4_yyerror_args[yymsg); + else + yyerror (]b4_yyerror_args[YY_("syntax error")); + if (yysyntax_error_status == 2) + goto yyexhaustedlab; + break; + } #endif } @@ -1660,8 +1688,13 @@ 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); @@ -1692,8 +1725,7 @@ yypushreturn:]])[ 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]) + [1984, 1989-1990, 2000-2010]) b4_percent_code_get([[requires]])[]dnl