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Annotation of GNUtools/bison/bison.simple, revision 1.1

1.1     ! root        1: /* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
        !             2: #line 3 "bison.simple"
        !             3: 
        !             4: /* Skeleton output parser for bison,
        !             5:    Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman
        !             6: 
        !             7:    This program is free software; you can redistribute it and/or modify
        !             8:    it under the terms of the GNU General Public License as published by
        !             9:    the Free Software Foundation; either version 1, or (at your option)
        !            10:    any later version.
        !            11: 
        !            12:    This program is distributed in the hope that it will be useful,
        !            13:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            14:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            15:    GNU General Public License for more details.
        !            16: 
        !            17:    You should have received a copy of the GNU General Public License
        !            18:    along with this program; if not, write to the Free Software
        !            19:    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            20: 
        !            21: 
        !            22: #ifndef alloca
        !            23: #ifdef __GNUC__
        !            24: #define alloca __builtin_alloca
        !            25: #else /* not GNU C.  */
        !            26: #if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
        !            27: #include <alloca.h>
        !            28: #else /* not sparc */
        !            29: #if defined (MSDOS) && !defined (__TURBOC__)
        !            30: #include <malloc.h>
        !            31: #else /* not MSDOS, or __TURBOC__ */
        !            32: #if defined(_AIX)
        !            33: #include <malloc.h>
        !            34:  #pragma alloca
        !            35: #else /* not MSDOS, __TURBOC__, or _AIX */
        !            36: #ifdef __hpux
        !            37: #ifdef __cplusplus
        !            38: extern "C" {
        !            39: void *alloca (unsigned int);
        !            40: };
        !            41: #else /* not __cplusplus */
        !            42: void *alloca ();
        !            43: #endif /* not __cplusplus */
        !            44: #endif /* __hpux */
        !            45: #endif /* not _AIX */
        !            46: #endif /* not MSDOS, or __TURBOC__ */
        !            47: #endif /* not sparc.  */
        !            48: #endif /* not GNU C.  */
        !            49: #endif /* alloca not defined.  */
        !            50: 
        !            51: /* This is the parser code that is written into each bison parser
        !            52:   when the %semantic_parser declaration is not specified in the grammar.
        !            53:   It was written by Richard Stallman by simplifying the hairy parser
        !            54:   used when %semantic_parser is specified.  */
        !            55: 
        !            56: /* Note: there must be only one dollar sign in this file.
        !            57:    It is replaced by the list of actions, each action
        !            58:    as one case of the switch.  */
        !            59: 
        !            60: #define yyerrok                (yyerrstatus = 0)
        !            61: #define yyclearin      (yychar = YYEMPTY)
        !            62: #define YYEMPTY                -2
        !            63: #define YYEOF          0
        !            64: #define YYACCEPT       return(0)
        !            65: #define YYABORT        return(1)
        !            66: #define YYERROR                goto yyerrlab1
        !            67: /* Like YYERROR except do call yyerror.
        !            68:    This remains here temporarily to ease the
        !            69:    transition to the new meaning of YYERROR, for GCC.
        !            70:    Once GCC version 2 has supplanted version 1, this can go.  */
        !            71: #define YYFAIL         goto yyerrlab
        !            72: #define YYRECOVERING()  (!!yyerrstatus)
        !            73: #define YYBACKUP(token, value) \
        !            74: do                                                             \
        !            75:   if (yychar == YYEMPTY && yylen == 1)                         \
        !            76:     { yychar = (token), yylval = (value);                      \
        !            77:       yychar1 = YYTRANSLATE (yychar);                          \
        !            78:       YYPOPSTACK;                                              \
        !            79:       goto yybackup;                                           \
        !            80:     }                                                          \
        !            81:   else                                                         \
        !            82:     { yyerror ("syntax error: cannot back up"); YYERROR; }     \
        !            83: while (0)
        !            84: 
        !            85: #define YYTERROR       1
        !            86: #define YYERRCODE      256
        !            87: 
        !            88: #ifndef YYPURE
        !            89: #define YYLEX          yylex()
        !            90: #endif
        !            91: 
        !            92: #ifdef YYPURE
        !            93: #ifdef YYLSP_NEEDED
        !            94: #define YYLEX          yylex(&yylval, &yylloc)
        !            95: #else
        !            96: #define YYLEX          yylex(&yylval)
        !            97: #endif
        !            98: #endif
        !            99: 
        !           100: /* If nonreentrant, generate the variables here */
        !           101: 
        !           102: #ifndef YYPURE
        !           103: 
        !           104: int    yychar;                 /*  the lookahead symbol                */
        !           105: YYSTYPE        yylval;                 /*  the semantic value of the           */
        !           106:                                /*  lookahead symbol                    */
        !           107: 
        !           108: #ifdef YYLSP_NEEDED
        !           109: YYLTYPE yylloc;                        /*  location data for the lookahead     */
        !           110:                                /*  symbol                              */
        !           111: #endif
        !           112: 
        !           113: int yynerrs;                   /*  number of parse errors so far       */
        !           114: #endif  /* not YYPURE */
        !           115: 
        !           116: #if YYDEBUG != 0
        !           117: int yydebug;                   /*  nonzero means print parse trace     */
        !           118: /* Since this is uninitialized, it does not stop multiple parsers
        !           119:    from coexisting.  */
        !           120: #endif
        !           121: 
        !           122: /*  YYINITDEPTH indicates the initial size of the parser's stacks      */
        !           123: 
        !           124: #ifndef        YYINITDEPTH
        !           125: #define YYINITDEPTH 200
        !           126: #endif
        !           127: 
        !           128: /*  YYMAXDEPTH is the maximum size the stacks can grow to
        !           129:     (effective only if the built-in stack extension method is used).  */
        !           130: 
        !           131: #if YYMAXDEPTH == 0
        !           132: #undef YYMAXDEPTH
        !           133: #endif
        !           134: 
        !           135: #ifndef YYMAXDEPTH
        !           136: #define YYMAXDEPTH 10000
        !           137: #endif
        !           138: 
        !           139: /* Prevent warning if -Wstrict-prototypes.  */
        !           140: #ifdef __GNUC__
        !           141: int yyparse (void);
        !           142: #endif
        !           143: 
        !           144: #if __GNUC__ > 1               /* GNU C and GNU C++ define this.  */
        !           145: #define __yy_bcopy(FROM,TO,COUNT)      __builtin_memcpy(TO,FROM,COUNT)
        !           146: #else                          /* not GNU C or C++ */
        !           147: #ifndef __cplusplus
        !           148: 
        !           149: /* This is the most reliable way to avoid incompatibilities
        !           150:    in available built-in functions on various systems.  */
        !           151: static void
        !           152: __yy_bcopy (from, to, count)
        !           153:      char *from;
        !           154:      char *to;
        !           155:      int count;
        !           156: {
        !           157:   register char *f = from;
        !           158:   register char *t = to;
        !           159:   register int i = count;
        !           160: 
        !           161:   while (i-- > 0)
        !           162:     *t++ = *f++;
        !           163: }
        !           164: 
        !           165: #else /* __cplusplus */
        !           166: 
        !           167: /* This is the most reliable way to avoid incompatibilities
        !           168:    in available built-in functions on various systems.  */
        !           169: static void
        !           170: __yy_bcopy (char *from, char *to, int count)
        !           171: {
        !           172:   register char *f = from;
        !           173:   register char *t = to;
        !           174:   register int i = count;
        !           175: 
        !           176:   while (i-- > 0)
        !           177:     *t++ = *f++;
        !           178: }
        !           179: 
        !           180: #endif
        !           181: #endif
        !           182: 
        !           183: #line 184 "bison.simple"
        !           184: int
        !           185: yyparse()
        !           186: {
        !           187:   register int yystate;
        !           188:   register int yyn;
        !           189:   register short *yyssp;
        !           190:   register YYSTYPE *yyvsp;
        !           191:   int yyerrstatus;     /*  number of tokens to shift before error messages enabled */
        !           192:   int yychar1 = 0;             /*  lookahead token as an internal (translated) token number */
        !           193: 
        !           194:   short        yyssa[YYINITDEPTH];     /*  the state stack                     */
        !           195:   YYSTYPE yyvsa[YYINITDEPTH];  /*  the semantic value stack            */
        !           196: 
        !           197:   short *yyss = yyssa;         /*  refer to the stacks thru separate pointers */
        !           198:   YYSTYPE *yyvs = yyvsa;       /*  to allow yyoverflow to reallocate them elsewhere */
        !           199: 
        !           200: #ifdef YYLSP_NEEDED
        !           201:   YYLTYPE yylsa[YYINITDEPTH];  /*  the location stack                  */
        !           202:   YYLTYPE *yyls = yylsa;
        !           203:   YYLTYPE *yylsp;
        !           204: 
        !           205: #define YYPOPSTACK   (yyvsp--, yyssp--, yylsp--)
        !           206: #else
        !           207: #define YYPOPSTACK   (yyvsp--, yyssp--)
        !           208: #endif
        !           209: 
        !           210:   int yystacksize = YYINITDEPTH;
        !           211: 
        !           212: #ifdef YYPURE
        !           213:   int yychar;
        !           214:   YYSTYPE yylval;
        !           215:   int yynerrs;
        !           216: #ifdef YYLSP_NEEDED
        !           217:   YYLTYPE yylloc;
        !           218: #endif
        !           219: #endif
        !           220: 
        !           221:   YYSTYPE yyval;               /*  the variable used to return         */
        !           222:                                /*  semantic values from the action     */
        !           223:                                /*  routines                            */
        !           224: 
        !           225:   int yylen;
        !           226: 
        !           227: #if YYDEBUG != 0
        !           228:   if (yydebug)
        !           229:     fprintf(stderr, "Starting parse\n");
        !           230: #endif
        !           231: 
        !           232:   yystate = 0;
        !           233:   yyerrstatus = 0;
        !           234:   yynerrs = 0;
        !           235:   yychar = YYEMPTY;            /* Cause a token to be read.  */
        !           236: 
        !           237:   /* Initialize stack pointers.
        !           238:      Waste one element of value and location stack
        !           239:      so that they stay on the same level as the state stack.
        !           240:      The wasted elements are never initialized.  */
        !           241: 
        !           242:   yyssp = yyss - 1;
        !           243:   yyvsp = yyvs;
        !           244: #ifdef YYLSP_NEEDED
        !           245:   yylsp = yyls;
        !           246: #endif
        !           247: 
        !           248: /* Push a new state, which is found in  yystate  .  */
        !           249: /* In all cases, when you get here, the value and location stacks
        !           250:    have just been pushed. so pushing a state here evens the stacks.  */
        !           251: yynewstate:
        !           252: 
        !           253:   *++yyssp = yystate;
        !           254: 
        !           255:   if (yyssp >= yyss + yystacksize - 1)
        !           256:     {
        !           257:       /* Give user a chance to reallocate the stack */
        !           258:       /* Use copies of these so that the &'s don't force the real ones into memory. */
        !           259:       YYSTYPE *yyvs1 = yyvs;
        !           260:       short *yyss1 = yyss;
        !           261: #ifdef YYLSP_NEEDED
        !           262:       YYLTYPE *yyls1 = yyls;
        !           263: #endif
        !           264: 
        !           265:       /* Get the current used size of the three stacks, in elements.  */
        !           266:       int size = yyssp - yyss + 1;
        !           267: 
        !           268: #ifdef yyoverflow
        !           269:       /* Each stack pointer address is followed by the size of
        !           270:         the data in use in that stack, in bytes.  */
        !           271: #ifdef YYLSP_NEEDED
        !           272:       /* This used to be a conditional around just the two extra args,
        !           273:         but that might be undefined if yyoverflow is a macro.  */
        !           274:       yyoverflow("parser stack overflow",
        !           275:                 &yyss1, size * sizeof (*yyssp),
        !           276:                 &yyvs1, size * sizeof (*yyvsp),
        !           277:                 &yyls1, size * sizeof (*yylsp),
        !           278:                 &yystacksize);
        !           279: #else
        !           280:       yyoverflow("parser stack overflow",
        !           281:                 &yyss1, size * sizeof (*yyssp),
        !           282:                 &yyvs1, size * sizeof (*yyvsp),
        !           283:                 &yystacksize);
        !           284: #endif
        !           285: 
        !           286:       yyss = yyss1; yyvs = yyvs1;
        !           287: #ifdef YYLSP_NEEDED
        !           288:       yyls = yyls1;
        !           289: #endif
        !           290: #else /* no yyoverflow */
        !           291:       /* Extend the stack our own way.  */
        !           292:       if (yystacksize >= YYMAXDEPTH)
        !           293:        {
        !           294:          yyerror("parser stack overflow");
        !           295:          return 2;
        !           296:        }
        !           297:       yystacksize *= 2;
        !           298:       if (yystacksize > YYMAXDEPTH)
        !           299:        yystacksize = YYMAXDEPTH;
        !           300:       yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
        !           301:       __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
        !           302:       yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
        !           303:       __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
        !           304: #ifdef YYLSP_NEEDED
        !           305:       yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
        !           306:       __yy_bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
        !           307: #endif
        !           308: #endif /* no yyoverflow */
        !           309: 
        !           310:       yyssp = yyss + size - 1;
        !           311:       yyvsp = yyvs + size - 1;
        !           312: #ifdef YYLSP_NEEDED
        !           313:       yylsp = yyls + size - 1;
        !           314: #endif
        !           315: 
        !           316: #if YYDEBUG != 0
        !           317:       if (yydebug)
        !           318:        fprintf(stderr, "Stack size increased to %d\n", yystacksize);
        !           319: #endif
        !           320: 
        !           321:       if (yyssp >= yyss + yystacksize - 1)
        !           322:        YYABORT;
        !           323:     }
        !           324: 
        !           325: #if YYDEBUG != 0
        !           326:   if (yydebug)
        !           327:     fprintf(stderr, "Entering state %d\n", yystate);
        !           328: #endif
        !           329: 
        !           330:   goto yybackup;
        !           331:  yybackup:
        !           332: 
        !           333: /* Do appropriate processing given the current state.  */
        !           334: /* Read a lookahead token if we need one and don't already have one.  */
        !           335: /* yyresume: */
        !           336: 
        !           337:   /* First try to decide what to do without reference to lookahead token.  */
        !           338: 
        !           339:   yyn = yypact[yystate];
        !           340:   if (yyn == YYFLAG)
        !           341:     goto yydefault;
        !           342: 
        !           343:   /* Not known => get a lookahead token if don't already have one.  */
        !           344: 
        !           345:   /* yychar is either YYEMPTY or YYEOF
        !           346:      or a valid token in external form.  */
        !           347: 
        !           348:   if (yychar == YYEMPTY)
        !           349:     {
        !           350: #if YYDEBUG != 0
        !           351:       if (yydebug)
        !           352:        fprintf(stderr, "Reading a token: ");
        !           353: #endif
        !           354:       yychar = YYLEX;
        !           355:     }
        !           356: 
        !           357:   /* Convert token to internal form (in yychar1) for indexing tables with */
        !           358: 
        !           359:   if (yychar <= 0)             /* This means end of input. */
        !           360:     {
        !           361:       yychar1 = 0;
        !           362:       yychar = YYEOF;          /* Don't call YYLEX any more */
        !           363: 
        !           364: #if YYDEBUG != 0
        !           365:       if (yydebug)
        !           366:        fprintf(stderr, "Now at end of input.\n");
        !           367: #endif
        !           368:     }
        !           369:   else
        !           370:     {
        !           371:       yychar1 = YYTRANSLATE(yychar);
        !           372: 
        !           373: #if YYDEBUG != 0
        !           374:       if (yydebug)
        !           375:        {
        !           376:          fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
        !           377:          /* Give the individual parser a way to print the precise meaning
        !           378:             of a token, for further debugging info.  */
        !           379: #ifdef YYPRINT
        !           380:          YYPRINT (stderr, yychar, yylval);
        !           381: #endif
        !           382:          fprintf (stderr, ")\n");
        !           383:        }
        !           384: #endif
        !           385:     }
        !           386: 
        !           387:   yyn += yychar1;
        !           388:   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
        !           389:     goto yydefault;
        !           390: 
        !           391:   yyn = yytable[yyn];
        !           392: 
        !           393:   /* yyn is what to do for this token type in this state.
        !           394:      Negative => reduce, -yyn is rule number.
        !           395:      Positive => shift, yyn is new state.
        !           396:        New state is final state => don't bother to shift,
        !           397:        just return success.
        !           398:      0, or most negative number => error.  */
        !           399: 
        !           400:   if (yyn < 0)
        !           401:     {
        !           402:       if (yyn == YYFLAG)
        !           403:        goto yyerrlab;
        !           404:       yyn = -yyn;
        !           405:       goto yyreduce;
        !           406:     }
        !           407:   else if (yyn == 0)
        !           408:     goto yyerrlab;
        !           409: 
        !           410:   if (yyn == YYFINAL)
        !           411:     YYACCEPT;
        !           412: 
        !           413:   /* Shift the lookahead token.  */
        !           414: 
        !           415: #if YYDEBUG != 0
        !           416:   if (yydebug)
        !           417:     fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
        !           418: #endif
        !           419: 
        !           420:   /* Discard the token being shifted unless it is eof.  */
        !           421:   if (yychar != YYEOF)
        !           422:     yychar = YYEMPTY;
        !           423: 
        !           424:   *++yyvsp = yylval;
        !           425: #ifdef YYLSP_NEEDED
        !           426:   *++yylsp = yylloc;
        !           427: #endif
        !           428: 
        !           429:   /* count tokens shifted since error; after three, turn off error status.  */
        !           430:   if (yyerrstatus) yyerrstatus--;
        !           431: 
        !           432:   yystate = yyn;
        !           433:   goto yynewstate;
        !           434: 
        !           435: /* Do the default action for the current state.  */
        !           436: yydefault:
        !           437: 
        !           438:   yyn = yydefact[yystate];
        !           439:   if (yyn == 0)
        !           440:     goto yyerrlab;
        !           441: 
        !           442: /* Do a reduction.  yyn is the number of a rule to reduce with.  */
        !           443: yyreduce:
        !           444:   yylen = yyr2[yyn];
        !           445:   if (yylen > 0)
        !           446:     yyval = yyvsp[1-yylen]; /* implement default value of the action */
        !           447: 
        !           448: #if YYDEBUG != 0
        !           449:   if (yydebug)
        !           450:     {
        !           451:       int i;
        !           452: 
        !           453:       fprintf (stderr, "Reducing via rule %d (line %d), ",
        !           454:               yyn, yyrline[yyn]);
        !           455: 
        !           456:       /* Print the symbols being reduced, and their result.  */
        !           457:       for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
        !           458:        fprintf (stderr, "%s ", yytname[yyrhs[i]]);
        !           459:       fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
        !           460:     }
        !           461: #endif
        !           462: 
        !           463: $   /* the action file gets copied in in place of this dollarsign */
        !           464: #line 465 "bison.simple"
        !           465: 
        !           466:   yyvsp -= yylen;
        !           467:   yyssp -= yylen;
        !           468: #ifdef YYLSP_NEEDED
        !           469:   yylsp -= yylen;
        !           470: #endif
        !           471: 
        !           472: #if YYDEBUG != 0
        !           473:   if (yydebug)
        !           474:     {
        !           475:       short *ssp1 = yyss - 1;
        !           476:       fprintf (stderr, "state stack now");
        !           477:       while (ssp1 != yyssp)
        !           478:        fprintf (stderr, " %d", *++ssp1);
        !           479:       fprintf (stderr, "\n");
        !           480:     }
        !           481: #endif
        !           482: 
        !           483:   *++yyvsp = yyval;
        !           484: 
        !           485: #ifdef YYLSP_NEEDED
        !           486:   yylsp++;
        !           487:   if (yylen == 0)
        !           488:     {
        !           489:       yylsp->first_line = yylloc.first_line;
        !           490:       yylsp->first_column = yylloc.first_column;
        !           491:       yylsp->last_line = (yylsp-1)->last_line;
        !           492:       yylsp->last_column = (yylsp-1)->last_column;
        !           493:       yylsp->text = 0;
        !           494:     }
        !           495:   else
        !           496:     {
        !           497:       yylsp->last_line = (yylsp+yylen-1)->last_line;
        !           498:       yylsp->last_column = (yylsp+yylen-1)->last_column;
        !           499:     }
        !           500: #endif
        !           501: 
        !           502:   /* Now "shift" the result of the reduction.
        !           503:      Determine what state that goes to,
        !           504:      based on the state we popped back to
        !           505:      and the rule number reduced by.  */
        !           506: 
        !           507:   yyn = yyr1[yyn];
        !           508: 
        !           509:   yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
        !           510:   if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
        !           511:     yystate = yytable[yystate];
        !           512:   else
        !           513:     yystate = yydefgoto[yyn - YYNTBASE];
        !           514: 
        !           515:   goto yynewstate;
        !           516: 
        !           517: yyerrlab:   /* here on detecting error */
        !           518: 
        !           519:   if (! yyerrstatus)
        !           520:     /* If not already recovering from an error, report this error.  */
        !           521:     {
        !           522:       ++yynerrs;
        !           523: 
        !           524: #ifdef YYERROR_VERBOSE
        !           525:       yyn = yypact[yystate];
        !           526: 
        !           527:       if (yyn > YYFLAG && yyn < YYLAST)
        !           528:        {
        !           529:          int size = 0;
        !           530:          char *msg;
        !           531:          int x, count;
        !           532: 
        !           533:          count = 0;
        !           534:          /* Start X at -yyn if nec to avoid negative indexes in yycheck.  */
        !           535:          for (x = (yyn < 0 ? -yyn : 0);
        !           536:               x < (sizeof(yytname) / sizeof(char *)); x++)
        !           537:            if (yycheck[x + yyn] == x)
        !           538:              size += strlen(yytname[x]) + 15, count++;
        !           539:          msg = (char *) malloc(size + 15);
        !           540:          if (msg != 0)
        !           541:            {
        !           542:              strcpy(msg, "parse error");
        !           543: 
        !           544:              if (count < 5)
        !           545:                {
        !           546:                  count = 0;
        !           547:                  for (x = (yyn < 0 ? -yyn : 0);
        !           548:                       x < (sizeof(yytname) / sizeof(char *)); x++)
        !           549:                    if (yycheck[x + yyn] == x)
        !           550:                      {
        !           551:                        strcat(msg, count == 0 ? ", expecting `" : " or `");
        !           552:                        strcat(msg, yytname[x]);
        !           553:                        strcat(msg, "'");
        !           554:                        count++;
        !           555:                      }
        !           556:                }
        !           557:              yyerror(msg);
        !           558:              free(msg);
        !           559:            }
        !           560:          else
        !           561:            yyerror ("parse error; also virtual memory exceeded");
        !           562:        }
        !           563:       else
        !           564: #endif /* YYERROR_VERBOSE */
        !           565:        yyerror("parse error");
        !           566:     }
        !           567: 
        !           568:   goto yyerrlab1;
        !           569: yyerrlab1:   /* here on error raised explicitly by an action */
        !           570: 
        !           571:   if (yyerrstatus == 3)
        !           572:     {
        !           573:       /* if just tried and failed to reuse lookahead token after an error, discard it.  */
        !           574: 
        !           575:       /* return failure if at end of input */
        !           576:       if (yychar == YYEOF)
        !           577:        YYABORT;
        !           578: 
        !           579: #if YYDEBUG != 0
        !           580:       if (yydebug)
        !           581:        fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
        !           582: #endif
        !           583: 
        !           584:       yychar = YYEMPTY;
        !           585:     }
        !           586: 
        !           587:   /* Else will try to reuse lookahead token
        !           588:      after shifting the error token.  */
        !           589: 
        !           590:   yyerrstatus = 3;             /* Each real token shifted decrements this */
        !           591: 
        !           592:   goto yyerrhandle;
        !           593: 
        !           594: yyerrdefault:  /* current state does not do anything special for the error token. */
        !           595: 
        !           596: #if 0
        !           597:   /* This is wrong; only states that explicitly want error tokens
        !           598:      should shift them.  */
        !           599:   yyn = yydefact[yystate];  /* If its default is to accept any token, ok.  Otherwise pop it.*/
        !           600:   if (yyn) goto yydefault;
        !           601: #endif
        !           602: 
        !           603: yyerrpop:   /* pop the current state because it cannot handle the error token */
        !           604: 
        !           605:   if (yyssp == yyss) YYABORT;
        !           606:   yyvsp--;
        !           607:   yystate = *--yyssp;
        !           608: #ifdef YYLSP_NEEDED
        !           609:   yylsp--;
        !           610: #endif
        !           611: 
        !           612: #if YYDEBUG != 0
        !           613:   if (yydebug)
        !           614:     {
        !           615:       short *ssp1 = yyss - 1;
        !           616:       fprintf (stderr, "Error: state stack now");
        !           617:       while (ssp1 != yyssp)
        !           618:        fprintf (stderr, " %d", *++ssp1);
        !           619:       fprintf (stderr, "\n");
        !           620:     }
        !           621: #endif
        !           622: 
        !           623: yyerrhandle:
        !           624: 
        !           625:   yyn = yypact[yystate];
        !           626:   if (yyn == YYFLAG)
        !           627:     goto yyerrdefault;
        !           628: 
        !           629:   yyn += YYTERROR;
        !           630:   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
        !           631:     goto yyerrdefault;
        !           632: 
        !           633:   yyn = yytable[yyn];
        !           634:   if (yyn < 0)
        !           635:     {
        !           636:       if (yyn == YYFLAG)
        !           637:        goto yyerrpop;
        !           638:       yyn = -yyn;
        !           639:       goto yyreduce;
        !           640:     }
        !           641:   else if (yyn == 0)
        !           642:     goto yyerrpop;
        !           643: 
        !           644:   if (yyn == YYFINAL)
        !           645:     YYACCEPT;
        !           646: 
        !           647: #if YYDEBUG != 0
        !           648:   if (yydebug)
        !           649:     fprintf(stderr, "Shifting error token, ");
        !           650: #endif
        !           651: 
        !           652:   *++yyvsp = yylval;
        !           653: #ifdef YYLSP_NEEDED
        !           654:   *++yylsp = yylloc;
        !           655: #endif
        !           656: 
        !           657:   yystate = yyn;
        !           658:   goto yynewstate;
        !           659: }

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