3 * Copyright (c) 2004, 2005, 2006 Larry Wall and others
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
8 * Note that this file was originally generated as an output from
9 * GNU bison version 1.875, but now the code is statically maintained
10 * and edited; the bits that are dependent on perly.y are now
11 * #included from the files perly.tab and perly.act.
13 * Here is an important copyright statement from the original, generated
16 * As a special exception, when this file is copied by Bison into a
17 * Bison output file, you may use that output file without
18 * restriction. This special exception was added by the Free
19 * Software Foundation in version 1.24 of Bison.
21 * Note that this file is also #included in madly.c, to allow compilation
22 * of a second parser, Perl_madparse, that is identical to Perl_yyparse,
23 * but which includes extra code for dumping the parse tree.
24 * This is controlled by the PERL_IN_MADLY_C define.
29 /* allow stack size to grow effectively without limit */
30 #define YYMAXDEPTH 10000000
33 #define PERL_IN_PERLY_C
36 typedef unsigned char yytype_uint8;
37 typedef signed char yytype_int8;
38 typedef unsigned short int yytype_uint16;
39 typedef short int yytype_int16;
40 typedef signed char yysigned_char;
48 /* contains all the parser state tables; auto-generated from perly.y */
51 # define YYSIZE_T size_t
53 #define yyerrok (yyerrstatus = 0)
54 #define yyclearin (yychar = YYEMPTY)
58 #define YYACCEPT goto yyacceptlab
59 #define YYABORT goto yyabortlab
60 #define YYERROR goto yyerrlab1
63 /* Like YYERROR except do call yyerror. This remains here temporarily
64 to ease the transition to the new meaning of YYERROR, for GCC.
65 Once GCC version 2 has supplanted version 1, this can go. */
67 #define YYFAIL goto yyerrlab
69 #define YYRECOVERING() (!!yyerrstatus)
71 #define YYBACKUP(Token, Value) \
73 if (yychar == YYEMPTY && yylen == 1) { \
76 yytoken = YYTRANSLATE (yychar); \
81 yyerror ("syntax error: cannot back up"); \
89 /* Enable debugging if requested. */
92 # define yydebug (DEBUG_p_TEST)
94 # define YYFPRINTF PerlIO_printf
96 # define YYDPRINTF(Args) \
102 # define YYDSYMPRINTF(Title, Token, Value) \
105 YYFPRINTF (Perl_debug_log, "%s ", Title); \
106 yysymprint (aTHX_ Perl_debug_log, Token, Value); \
107 YYFPRINTF (Perl_debug_log, "\n"); \
111 /*--------------------------------.
112 | Print this symbol on YYOUTPUT. |
113 `--------------------------------*/
116 yysymprint(pTHX_ PerlIO * const yyoutput, int yytype, const YYSTYPE * const yyvaluep)
118 if (yytype < YYNTOKENS) {
119 YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
121 YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
123 YYFPRINTF (yyoutput, "0x%"UVxf, (UV)yyvaluep->ival);
127 YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
129 YYFPRINTF (yyoutput, ")");
134 * print the top 8 items on the parse stack. The args have the same
135 * meanings as the local vars in yyparse() of the same name */
138 yy_stack_print (pTHX_ const short *yyss, const short *yyssp, const YYSTYPE *yyvs, const char**yyns)
142 int count = (int)(yyssp - yyss);
145 start = count - 8 + 1;
149 PerlIO_printf(Perl_debug_log, "\nindex:");
150 for (i=0; i < count; i++)
151 PerlIO_printf(Perl_debug_log, " %8d", start+i);
152 PerlIO_printf(Perl_debug_log, "\nstate:");
153 for (i=0; i < count; i++)
154 PerlIO_printf(Perl_debug_log, " %8d", yyss[start+i]);
155 PerlIO_printf(Perl_debug_log, "\ntoken:");
156 for (i=0; i < count; i++)
157 PerlIO_printf(Perl_debug_log, " %8.8s", yyns[start+i]);
158 PerlIO_printf(Perl_debug_log, "\nvalue:");
159 for (i=0; i < count; i++) {
160 switch (yy_type_tab[yystos[yyss[start+i]]]) {
162 PerlIO_printf(Perl_debug_log, " %8.8s",
164 ? PL_op_name[yyvs[start+i].opval->op_type]
168 #ifndef PERL_IN_MADLY_C
169 case toketype_p_tkval:
170 PerlIO_printf(Perl_debug_log, " %8.8s",
171 yyvs[start+i].pval ? yyvs[start+i].pval : "(NULL)");
174 case toketype_i_tkval:
177 PerlIO_printf(Perl_debug_log, " %8"IVdf, yyvs[start+i].ival);
180 PerlIO_printf(Perl_debug_log, " %8"UVxf, (UV)yyvs[start+i].ival);
183 PerlIO_printf(Perl_debug_log, "\n\n");
186 # define YY_STACK_PRINT(yyss, yyssp, yyvs, yyns) \
188 if (yydebug && DEBUG_v_TEST) \
189 yy_stack_print (aTHX_ (yyss), (yyssp), (yyvs), (yyns)); \
193 /*------------------------------------------------.
194 | Report that the YYRULE is going to be reduced. |
195 `------------------------------------------------*/
198 yy_reduce_print (pTHX_ int yyrule)
201 const unsigned int yylineno = yyrline[yyrule];
202 YYFPRINTF (Perl_debug_log, "Reducing stack by rule %d (line %u), ",
203 yyrule - 1, yylineno);
204 /* Print the symbols being reduced, and their result. */
205 for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
206 YYFPRINTF (Perl_debug_log, "%s ", yytname [yyrhs[yyi]]);
207 YYFPRINTF (Perl_debug_log, "-> %s\n", yytname [yyr1[yyrule]]);
210 # define YY_REDUCE_PRINT(Rule) \
213 yy_reduce_print (aTHX_ Rule); \
216 #else /* !DEBUGGING */
217 # define YYDPRINTF(Args)
218 # define YYDSYMPRINTF(Title, Token, Value)
219 # define YY_STACK_PRINT(yyss, yyssp, yyvs, yyns)
220 # define YY_REDUCE_PRINT(Rule)
221 #endif /* !DEBUGGING */
224 /* YYINITDEPTH -- initial size of the parser's stacks. */
226 # define YYINITDEPTH 200
232 # if defined (__GLIBC__) && defined (_STRING_H)
233 # define yystrlen strlen
235 /* Return the length of YYSTR. */
237 yystrlen (const char *yystr)
239 register const char *yys = yystr;
241 while (*yys++ != '\0')
244 return yys - yystr - 1;
250 # if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
251 # define yystpcpy stpcpy
253 /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
256 yystpcpy (pTHX_ char *yydest, const char *yysrc)
258 register char *yyd = yydest;
259 register const char *yys = yysrc;
261 while ((*yyd++ = *yys++) != '\0')
269 #endif /* !YYERROR_VERBOSE */
276 #ifdef PERL_IN_MADLY_C
283 int yychar; /* The lookahead symbol. */
284 YYSTYPE yylval; /* The semantic value of the lookahead symbol. */
285 int yynerrs; /* Number of syntax errors so far. */
286 register int yystate;
290 /* Number of tokens to shift before error messages enabled. */
292 /* Lookahead token as an internal (translated) token number. */
295 /* two stacks and their tools:
296 yyss: related to states,
297 yyvs: related to semantic values,
299 Refer to the stacks thru separate pointers, to allow yyoverflow
300 to reallocate them elsewhere. */
302 /* The state stack. */
304 register short *yyssp;
306 /* The semantic value stack. */
308 register YYSTYPE *yyvsp;
310 /* for ease of re-allocation and automatic freeing, have two SVs whose
311 * SvPVX points to the stacks */
312 SV *yyss_sv, *yyvs_sv;
315 /* maintain also a stack of token/rule names for debugging with -Dpv */
316 const char **yyns, **yynsp;
318 # define YYPOPSTACK (yyvsp--, yyssp--, yynsp--)
320 # define YYPOPSTACK (yyvsp--, yyssp--)
324 YYSIZE_T yystacksize = YYINITDEPTH;
326 /* The variables used to return semantic value and location from the
331 /* When reducing, the number of symbols on the RHS of the reduced
335 #ifndef PERL_IN_MADLY_C
342 YYDPRINTF ((Perl_debug_log, "Starting parse\n"));
344 ENTER; /* force stack free before we return */
345 SAVEVPTR(PL_yycharp);
346 SAVEVPTR(PL_yylvalp);
347 PL_yycharp = &yychar; /* so PL_yyerror() can access it */
348 PL_yylvalp = &yylval; /* so various functions in toke.c can access it */
350 yyss_sv = newSV(YYINITDEPTH * sizeof(short));
351 yyvs_sv = newSV(YYINITDEPTH * sizeof(YYSTYPE));
354 yyss = (short *) SvPVX(yyss_sv);
355 yyvs = (YYSTYPE *) SvPVX(yyvs_sv);
356 /* note that elements zero of yyvs and yyns are not used */
360 yyns_sv = newSV(YYINITDEPTH * sizeof(char *));
362 /* XXX This seems strange to cast char * to char ** */
363 yyns = (const char **) SvPVX(yyns_sv);
370 yychar = YYEMPTY; /* Cause a token to be read. */
372 YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate));
376 /*------------------------------------------------------------.
377 | yynewstate -- Push a new state, which is found in yystate. |
378 `------------------------------------------------------------*/
380 /* In all cases, when you get here, the value and location stacks
381 have just been pushed. so pushing a state here evens the stacks.
388 if (yyss + yystacksize - 1 <= yyssp) {
389 /* Get the current used size of the three stacks, in elements. */
390 const YYSIZE_T yysize = yyssp - yyss + 1;
392 /* Extend the stack our own way. */
393 if (YYMAXDEPTH <= yystacksize)
396 if (YYMAXDEPTH < yystacksize)
397 yystacksize = YYMAXDEPTH;
399 SvGROW(yyss_sv, yystacksize * sizeof(short));
400 SvGROW(yyvs_sv, yystacksize * sizeof(YYSTYPE));
401 yyss = (short *) SvPVX(yyss_sv);
402 yyvs = (YYSTYPE *) SvPVX(yyvs_sv);
404 SvGROW(yyns_sv, yystacksize * sizeof(char *));
405 /* XXX This seems strange to cast char * to char ** */
406 yyns = (const char **) SvPVX(yyns_sv);
409 yynsp = yyns + yysize - 1;
414 yyssp = yyss + yysize - 1;
415 yyvsp = yyvs + yysize - 1;
418 YYDPRINTF ((Perl_debug_log, "Stack size increased to %lu\n",
419 (unsigned long int) yystacksize));
421 if (yyss + yystacksize - 1 <= yyssp)
432 /* Do appropriate processing given the current state. */
433 /* Read a lookahead token if we need one and don't already have one. */
436 /* First try to decide what to do without reference to lookahead token. */
438 yyn = yypact[yystate];
439 if (yyn == YYPACT_NINF)
442 /* Not known => get a lookahead token if don't already have one. */
444 /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */
445 if (yychar == YYEMPTY) {
446 YYDPRINTF ((Perl_debug_log, "Reading a token: "));
447 #ifdef PERL_IN_MADLY_C
448 yychar = PL_madskills ? madlex() : yylex();
454 if (yychar >= 0 && yychar < 255) {
455 yychar = NATIVE_TO_ASCII(yychar);
460 if (yychar <= YYEOF) {
461 yychar = yytoken = YYEOF;
462 YYDPRINTF ((Perl_debug_log, "Now at end of input.\n"));
465 yytoken = YYTRANSLATE (yychar);
466 YYDSYMPRINTF ("Next token is", yytoken, &yylval);
469 /* If the proper action on seeing token YYTOKEN is to reduce or to
470 detect an error, take that action. */
472 if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
476 if (yyn == 0 || yyn == YYTABLE_NINF)
485 /* Shift the lookahead token. */
486 YYDPRINTF ((Perl_debug_log, "Shifting token %s, ", yytname[yytoken]));
488 /* Discard the token being shifted unless it is eof. */
494 *++yynsp = (const char *)(yytname[yytoken]);
498 /* Count tokens shifted since error; after three, turn off error
504 YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate));
509 /*-----------------------------------------------------------.
510 | yydefault -- do the default action for the current state. |
511 `-----------------------------------------------------------*/
513 yyn = yydefact[yystate];
519 /*-----------------------------.
520 | yyreduce -- Do a reduction. |
521 `-----------------------------*/
523 /* yyn is the number of a rule to reduce with. */
526 /* If YYLEN is nonzero, implement the default value of the action:
529 Otherwise, the following line sets YYVAL to garbage.
530 This behavior is undocumented and Bison
531 users should not rely upon it. Assigning to YYVAL
532 unconditionally makes the parser a bit smaller, and it avoids a
533 GCC warning that YYVAL may be used uninitialized. */
534 yyval = yyvsp[1-yylen];
537 YY_REDUCE_PRINT (yyn);
541 #define dep() deprecate("\"do\" to call subroutines")
543 #ifdef PERL_IN_MADLY_C
544 # define IVAL(i) (i)->tk_lval.ival
545 # define PVAL(p) (p)->tk_lval.pval
546 # define TOKEN_GETMAD(a,b,c) token_getmad((a),(b),(c))
547 # define TOKEN_FREE(a) token_free(a)
548 # define OP_GETMAD(a,b,c) op_getmad((a),(b),(c))
549 # define IF_MAD(a,b) (a)
555 # define TOKEN_GETMAD(a,b,c)
556 # define TOKEN_FREE(a)
557 # define OP_GETMAD(a,b,c)
558 # define IF_MAD(a,b) (b)
563 /* contains all the rule actions; auto-generated from perly.y */
577 *++yynsp = (const char *)(yytname [yyr1[yyn]]);
580 /* Now shift the result of the reduction. Determine what state
581 that goes to, based on the state we popped back to and the rule
582 number reduced by. */
586 yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
587 if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
588 yystate = yytable[yystate];
590 yystate = yydefgoto[yyn - YYNTOKENS];
592 YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate));
595 /* tmp push yystate for stack print; this is normally pushed later in
599 YY_STACK_PRINT (yyss, yyssp, yyvs, yyns);
606 /*------------------------------------.
607 | yyerrlab -- here on detecting error |
608 `------------------------------------*/
610 /* If not already recovering from an error, report this error. */
614 yyn = yypact[yystate];
616 if (YYPACT_NINF < yyn && yyn < YYLAST) {
618 const int yytype = YYTRANSLATE (yychar);
623 /* Start YYX at -YYN if negative to avoid negative indexes in
625 for (yyx = yyn < 0 ? -yyn : 0;
626 yyx < (int) (sizeof (yytname) / sizeof (char *)); yyx++)
627 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
628 yysize += yystrlen (yytname[yyx]) + 15, yycount++;
629 yysize += yystrlen ("syntax error, unexpected ") + 1;
630 yysize += yystrlen (yytname[yytype]);
631 Newx(yymsg, yysize, char *);
633 const char *yyp = yystpcpy (yymsg, "syntax error, unexpected ");
634 yyp = yystpcpy (yyp, yytname[yytype]);
638 for (yyx = yyn < 0 ? -yyn : 0;
639 yyx < (int) (sizeof (yytname) / sizeof (char *));
642 if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) {
643 const char *yyq = ! yycount ?
644 ", expecting " : " or ";
645 yyp = yystpcpy (yyp, yyq);
646 yyp = yystpcpy (yyp, yytname[yyx]);
652 YYSTACK_FREE (yymsg);
655 yyerror ("syntax error; also virtual memory exhausted");
658 #endif /* YYERROR_VERBOSE */
659 yyerror ("syntax error");
663 if (yyerrstatus == 3) {
664 /* If just tried and failed to reuse lookahead token after an
665 error, discard it. */
667 /* Return failure if at end of input. */
668 if (yychar == YYEOF) {
669 /* Pop the error token. */
671 /* Pop the rest of the stack. */
672 while (yyss < yyssp) {
673 YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp);
674 if (yy_type_tab[yystos[*yyssp]] == toketype_opval) {
675 YYDPRINTF ((Perl_debug_log, "(freeing op)\n"));
676 op_free(yyvsp->opval);
683 YYDSYMPRINTF ("Error: discarding", yytoken, &yylval);
688 /* Else will try to reuse lookahead token after shifting the error
693 /*----------------------------------------------------.
694 | yyerrlab1 -- error raised explicitly by an action. |
695 `----------------------------------------------------*/
697 yyerrstatus = 3; /* Each real token shifted decrements this. */
700 yyn = yypact[yystate];
701 if (yyn != YYPACT_NINF) {
703 if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) {
710 /* Pop the current state because it cannot handle the error token. */
714 YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp);
715 if (yy_type_tab[yystos[*yyssp]] == toketype_opval) {
716 YYDPRINTF ((Perl_debug_log, "(freeing op)\n"));
717 op_free(yyvsp->opval);
725 YY_STACK_PRINT (yyss, yyssp, yyvs, yyns);
731 YYDPRINTF ((Perl_debug_log, "Shifting error token, "));
739 YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate));
744 /*-------------------------------------.
745 | yyacceptlab -- YYACCEPT comes here. |
746 `-------------------------------------*/
751 /*-----------------------------------.
752 | yyabortlab -- YYABORT comes here. |
753 `-----------------------------------*/
758 /*----------------------------------------------.
759 | yyoverflowlab -- parser overflow comes here. |
760 `----------------------------------------------*/
762 yyerror ("parser stack overflow");
768 LEAVE; /* force stack free before we return */
775 * c-indentation-style: bsd
777 * indent-tabs-mode: t
780 * ex: set ts=8 sts=4 sw=4 noet: