Commit | Line | Data |
---|---|---|
0de566d7 DM |
1 | /* perly.c |
2 | * | |
54ca4ee7 | 3 | * Copyright (c) 2004, 2005, 2006 Larry Wall and others |
0de566d7 DM |
4 | * |
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. | |
7 | * | |
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 #included | |
11 | * from the files perly.tab and perly.act. | |
12 | * | |
13 | * Here is an important copyright statement from the original, generated | |
14 | * file: | |
15 | * | |
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. | |
20 | */ | |
21 | ||
22 | ||
23 | /* allow stack size to grow effectively without limit */ | |
24 | #define YYMAXDEPTH 10000000 | |
25 | ||
79072805 | 26 | #include "EXTERN.h" |
864dbfa3 | 27 | #define PERL_IN_PERLY_C |
79072805 | 28 | #include "perl.h" |
09bef843 | 29 | |
0de566d7 DM |
30 | typedef signed char yysigned_char; |
31 | ||
32 | #ifdef DEBUGGING | |
33 | # define YYDEBUG 1 | |
93a17b20 | 34 | #else |
0de566d7 | 35 | # define YYDEBUG 0 |
93a17b20 | 36 | #endif |
09bef843 | 37 | |
0de566d7 DM |
38 | /* contains all the parser state tables; auto-generated from perly.y */ |
39 | #include "perly.tab" | |
40 | ||
41 | # define YYSIZE_T size_t | |
42 | ||
43 | #define yyerrok (yyerrstatus = 0) | |
44 | #define yyclearin (yychar = YYEMPTY) | |
45 | #define YYEMPTY (-2) | |
46 | #define YYEOF 0 | |
47 | ||
48 | #define YYACCEPT goto yyacceptlab | |
49 | #define YYABORT goto yyabortlab | |
50 | #define YYERROR goto yyerrlab1 | |
51 | ||
52 | ||
53 | /* Like YYERROR except do call yyerror. This remains here temporarily | |
54 | to ease the transition to the new meaning of YYERROR, for GCC. | |
55 | Once GCC version 2 has supplanted version 1, this can go. */ | |
56 | ||
57 | #define YYFAIL goto yyerrlab | |
58 | ||
59 | #define YYRECOVERING() (!!yyerrstatus) | |
60 | ||
61 | #define YYBACKUP(Token, Value) \ | |
62 | do \ | |
63 | if (yychar == YYEMPTY && yylen == 1) { \ | |
64 | yychar = (Token); \ | |
65 | yylval = (Value); \ | |
66 | yytoken = YYTRANSLATE (yychar); \ | |
67 | YYPOPSTACK; \ | |
68 | goto yybackup; \ | |
69 | } \ | |
70 | else { \ | |
71 | yyerror ("syntax error: cannot back up"); \ | |
72 | YYERROR; \ | |
73 | } \ | |
74 | while (0) | |
75 | ||
76 | #define YYTERROR 1 | |
77 | #define YYERRCODE 256 | |
78 | ||
0de566d7 | 79 | /* Enable debugging if requested. */ |
9388183f | 80 | #ifdef DEBUGGING |
0de566d7 DM |
81 | |
82 | # define yydebug (DEBUG_p_TEST) | |
83 | ||
84 | # define YYFPRINTF PerlIO_printf | |
85 | ||
86 | # define YYDPRINTF(Args) \ | |
87 | do { \ | |
88 | if (yydebug) \ | |
89 | YYFPRINTF Args; \ | |
90 | } while (0) | |
91 | ||
9388183f | 92 | # define YYDSYMPRINTF(Title, Token, Value) \ |
0de566d7 DM |
93 | do { \ |
94 | if (yydebug) { \ | |
95 | YYFPRINTF (Perl_debug_log, "%s ", Title); \ | |
ac9a0352 | 96 | yysymprint (Perl_debug_log, Token, Value); \ |
0de566d7 DM |
97 | YYFPRINTF (Perl_debug_log, "\n"); \ |
98 | } \ | |
99 | } while (0) | |
100 | ||
101 | /*--------------------------------. | |
102 | | Print this symbol on YYOUTPUT. | | |
103 | `--------------------------------*/ | |
104 | ||
105 | static void | |
ac9a0352 | 106 | yysymprint(PerlIO * const yyoutput, int yytype, const YYSTYPE * const yyvaluep) |
0de566d7 | 107 | { |
0de566d7 DM |
108 | if (yytype < YYNTOKENS) { |
109 | YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); | |
110 | # ifdef YYPRINT | |
111 | YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); | |
9388183f | 112 | # else |
e4584336 | 113 | YYFPRINTF (yyoutput, "0x%"UVxf, (UV)yyvaluep->ival); |
0de566d7 DM |
114 | # endif |
115 | } | |
116 | else | |
117 | YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); | |
118 | ||
0de566d7 DM |
119 | YYFPRINTF (yyoutput, ")"); |
120 | } | |
121 | ||
122 | ||
9388183f CB |
123 | /* yy_stack_print() |
124 | * print the top 8 items on the parse stack. The args have the same | |
125 | * meanings as the local vars in yyparse() of the same name */ | |
0de566d7 DM |
126 | |
127 | static void | |
df35152e | 128 | yy_stack_print (pTHX_ const short *yyss, const short *yyssp, const YYSTYPE *yyvs, const char**yyns) |
0de566d7 | 129 | { |
9388183f CB |
130 | int i; |
131 | int start = 1; | |
132 | int count = (int)(yyssp - yyss); | |
133 | ||
134 | if (count > 8) { | |
135 | start = count - 8 + 1; | |
136 | count = 8; | |
137 | } | |
138 | ||
139 | PerlIO_printf(Perl_debug_log, "\nindex:"); | |
140 | for (i=0; i < count; i++) | |
141 | PerlIO_printf(Perl_debug_log, " %8d", start+i); | |
142 | PerlIO_printf(Perl_debug_log, "\nstate:"); | |
21612876 DM |
143 | for (i=0; i < count; i++) |
144 | PerlIO_printf(Perl_debug_log, " %8d", yyss[start+i]); | |
9388183f | 145 | PerlIO_printf(Perl_debug_log, "\ntoken:"); |
21612876 DM |
146 | for (i=0; i < count; i++) |
147 | PerlIO_printf(Perl_debug_log, " %8.8s", yyns[start+i]); | |
9388183f | 148 | PerlIO_printf(Perl_debug_log, "\nvalue:"); |
21612876 DM |
149 | for (i=0; i < count; i++) { |
150 | if (yy_is_opval[yystos[yyss[start+i]]]) { | |
151 | PerlIO_printf(Perl_debug_log, " %8.8s", | |
152 | yyvs[start+i].opval | |
153 | ? PL_op_name[yyvs[start+i].opval->op_type] | |
154 | : "NULL" | |
155 | ); | |
156 | } | |
157 | else | |
158 | PerlIO_printf(Perl_debug_log, " %8"UVxf, (UV)yyvs[start+i].ival); | |
159 | } | |
9388183f | 160 | PerlIO_printf(Perl_debug_log, "\n\n"); |
0de566d7 DM |
161 | } |
162 | ||
9388183f | 163 | # define YY_STACK_PRINT(yyss, yyssp, yyvs, yyns) \ |
0de566d7 | 164 | do { \ |
9388183f CB |
165 | if (yydebug && DEBUG_v_TEST) \ |
166 | yy_stack_print (aTHX_ (yyss), (yyssp), (yyvs), (yyns)); \ | |
0de566d7 DM |
167 | } while (0) |
168 | ||
09bef843 | 169 | |
0de566d7 DM |
170 | /*------------------------------------------------. |
171 | | Report that the YYRULE is going to be reduced. | | |
172 | `------------------------------------------------*/ | |
173 | ||
174 | static void | |
175 | yy_reduce_print (pTHX_ int yyrule) | |
176 | { | |
177 | int yyi; | |
df35152e | 178 | const unsigned int yylineno = yyrline[yyrule]; |
0de566d7 DM |
179 | YYFPRINTF (Perl_debug_log, "Reducing stack by rule %d (line %u), ", |
180 | yyrule - 1, yylineno); | |
181 | /* Print the symbols being reduced, and their result. */ | |
182 | for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++) | |
183 | YYFPRINTF (Perl_debug_log, "%s ", yytname [yyrhs[yyi]]); | |
184 | YYFPRINTF (Perl_debug_log, "-> %s\n", yytname [yyr1[yyrule]]); | |
185 | } | |
186 | ||
187 | # define YY_REDUCE_PRINT(Rule) \ | |
188 | do { \ | |
189 | if (yydebug) \ | |
190 | yy_reduce_print (aTHX_ Rule); \ | |
191 | } while (0) | |
192 | ||
193 | #else /* !DEBUGGING */ | |
194 | # define YYDPRINTF(Args) | |
9388183f CB |
195 | # define YYDSYMPRINTF(Title, Token, Value) |
196 | # define YY_STACK_PRINT(yyss, yyssp, yyvs, yyns) | |
0de566d7 DM |
197 | # define YY_REDUCE_PRINT(Rule) |
198 | #endif /* !DEBUGGING */ | |
199 | ||
200 | ||
201 | /* YYINITDEPTH -- initial size of the parser's stacks. */ | |
202 | #ifndef YYINITDEPTH | |
203 | # define YYINITDEPTH 200 | |
09bef843 | 204 | #endif |
09bef843 | 205 | |
0de566d7 DM |
206 | |
207 | #if YYERROR_VERBOSE | |
208 | # ifndef yystrlen | |
209 | # if defined (__GLIBC__) && defined (_STRING_H) | |
210 | # define yystrlen strlen | |
211 | # else | |
212 | /* Return the length of YYSTR. */ | |
213 | static YYSIZE_T | |
214 | yystrlen (const char *yystr) | |
215 | { | |
216 | register const char *yys = yystr; | |
217 | ||
218 | while (*yys++ != '\0') | |
219 | continue; | |
220 | ||
221 | return yys - yystr - 1; | |
222 | } | |
223 | # endif | |
224 | # endif | |
225 | ||
226 | # ifndef yystpcpy | |
227 | # if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE) | |
228 | # define yystpcpy stpcpy | |
229 | # else | |
230 | /* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in | |
231 | YYDEST. */ | |
232 | static char * | |
233 | yystpcpy (pTHX_ char *yydest, const char *yysrc) | |
234 | { | |
235 | register char *yyd = yydest; | |
236 | register const char *yys = yysrc; | |
237 | ||
238 | while ((*yyd++ = *yys++) != '\0') | |
239 | continue; | |
240 | ||
241 | return yyd - 1; | |
242 | } | |
243 | # endif | |
244 | # endif | |
245 | ||
246 | #endif /* !YYERROR_VERBOSE */ | |
247 | ||
eb7d7d25 DM |
248 | |
249 | /* a snapshot of the current stack position variables for use by | |
250 | * S_clear_yystack */ | |
251 | ||
252 | typedef struct { | |
253 | short *yyss; | |
254 | short *yyssp; | |
255 | YYSTYPE *yyvsp; | |
256 | int yylen; | |
257 | } yystack_positions; | |
258 | ||
259 | /* called during cleanup (via SAVEDESTRUCTOR_X) to free any items on the | |
260 | * parse stack, thus avoiding leaks if we die */ | |
261 | ||
262 | static void | |
263 | S_clear_yystack(pTHX_ const void *p) | |
264 | { | |
265 | yystack_positions *y = (yystack_positions*) p; | |
266 | ||
267 | if (!y->yyss) | |
268 | return; | |
269 | YYDPRINTF ((Perl_debug_log, "clearing the parse stack\n")); | |
270 | y->yyvsp -= y->yylen; /* ignore the tokens that have just been reduced */ | |
271 | y->yyssp -= y->yylen; | |
272 | while (y->yyssp > y->yyss) { | |
273 | if (yy_is_opval[yystos[*y->yyssp]]) | |
274 | op_free(y->yyvsp->opval); | |
275 | y->yyvsp--; | |
276 | y->yyssp--; | |
277 | } | |
278 | } | |
279 | ||
0de566d7 DM |
280 | /*----------. |
281 | | yyparse. | | |
282 | `----------*/ | |
283 | ||
79072805 | 284 | int |
0de566d7 | 285 | Perl_yyparse (pTHX) |
79072805 | 286 | { |
97aff369 | 287 | dVAR; |
0de566d7 DM |
288 | int yychar; /* The lookahead symbol. */ |
289 | YYSTYPE yylval; /* The semantic value of the lookahead symbol. */ | |
290 | int yynerrs; /* Number of syntax errors so far. */ | |
291 | register int yystate; | |
292 | register int yyn; | |
293 | int yyresult; | |
294 | ||
295 | /* Number of tokens to shift before error messages enabled. */ | |
296 | int yyerrstatus; | |
297 | /* Lookahead token as an internal (translated) token number. */ | |
298 | int yytoken = 0; | |
299 | ||
300 | /* two stacks and their tools: | |
a0288114 AL |
301 | yyss: related to states, |
302 | yyvs: related to semantic values, | |
0de566d7 DM |
303 | |
304 | Refer to the stacks thru separate pointers, to allow yyoverflow | |
305 | to reallocate them elsewhere. */ | |
306 | ||
307 | /* The state stack. */ | |
308 | short *yyss; | |
93a17b20 | 309 | register short *yyssp; |
0de566d7 DM |
310 | |
311 | /* The semantic value stack. */ | |
312 | YYSTYPE *yyvs; | |
93a17b20 | 313 | register YYSTYPE *yyvsp; |
a0d0e21e | 314 | |
0de566d7 DM |
315 | /* for ease of re-allocation and automatic freeing, have two SVs whose |
316 | * SvPVX points to the stacks */ | |
317 | SV *yyss_sv, *yyvs_sv; | |
eb7d7d25 DM |
318 | SV *ss_save_sv; |
319 | yystack_positions *ss_save; | |
0de566d7 | 320 | |
9388183f CB |
321 | #ifdef DEBUGGING |
322 | /* maintain also a stack of token/rule names for debugging with -Dpv */ | |
e1ec3a88 | 323 | const char **yyns, **yynsp; |
9388183f CB |
324 | SV *yyns_sv; |
325 | # define YYPOPSTACK (yyvsp--, yyssp--, yynsp--) | |
326 | #else | |
327 | # define YYPOPSTACK (yyvsp--, yyssp--) | |
328 | #endif | |
329 | ||
0de566d7 DM |
330 | |
331 | YYSIZE_T yystacksize = YYINITDEPTH; | |
332 | ||
333 | /* The variables used to return semantic value and location from the | |
334 | action routines. */ | |
335 | YYSTYPE yyval; | |
336 | ||
337 | ||
338 | /* When reducing, the number of symbols on the RHS of the reduced | |
339 | rule. */ | |
340 | int yylen; | |
341 | ||
81d86705 | 342 | #ifdef PERL_MAD |
00e74f14 NC |
343 | if (PL_madskills) |
344 | return madparse(); | |
81d86705 NC |
345 | #endif |
346 | ||
0de566d7 DM |
347 | YYDPRINTF ((Perl_debug_log, "Starting parse\n")); |
348 | ||
0de566d7 | 349 | ENTER; /* force stack free before we return */ |
12fbd33b DM |
350 | SAVEVPTR(PL_yycharp); |
351 | SAVEVPTR(PL_yylvalp); | |
352 | PL_yycharp = &yychar; /* so PL_yyerror() can access it */ | |
353 | PL_yylvalp = &yylval; /* so various functions in toke.c can access it */ | |
354 | ||
561b68a9 SH |
355 | yyss_sv = newSV(YYINITDEPTH * sizeof(short)); |
356 | yyvs_sv = newSV(YYINITDEPTH * sizeof(YYSTYPE)); | |
eb7d7d25 | 357 | ss_save_sv = newSV(sizeof(yystack_positions)); |
0de566d7 DM |
358 | SAVEFREESV(yyss_sv); |
359 | SAVEFREESV(yyvs_sv); | |
eb7d7d25 | 360 | SAVEFREESV(ss_save_sv); |
0de566d7 DM |
361 | yyss = (short *) SvPVX(yyss_sv); |
362 | yyvs = (YYSTYPE *) SvPVX(yyvs_sv); | |
eb7d7d25 DM |
363 | ss_save = (yystack_positions *) SvPVX(ss_save_sv); |
364 | ||
365 | ss_save->yyss = NULL; /* disarm stack cleanup */ | |
366 | /* cleanup the parse stack on premature exit */ | |
367 | SAVEDESTRUCTOR_X(S_clear_yystack, (void*) ss_save); | |
368 | ||
9388183f CB |
369 | /* note that elements zero of yyvs and yyns are not used */ |
370 | yyssp = yyss; | |
371 | yyvsp = yyvs; | |
372 | #ifdef DEBUGGING | |
561b68a9 | 373 | yyns_sv = newSV(YYINITDEPTH * sizeof(char *)); |
9388183f | 374 | SAVEFREESV(yyns_sv); |
a28509cc | 375 | /* XXX This seems strange to cast char * to char ** */ |
94a11853 | 376 | yyns = (const char **) SvPVX(yyns_sv); |
9388183f CB |
377 | yynsp = yyns; |
378 | #endif | |
79072805 | 379 | |
0de566d7 DM |
380 | yystate = 0; |
381 | yyerrstatus = 0; | |
93a17b20 | 382 | yynerrs = 0; |
0de566d7 DM |
383 | yychar = YYEMPTY; /* Cause a token to be read. */ |
384 | ||
9388183f | 385 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
0de566d7 DM |
386 | |
387 | goto yysetstate; | |
388 | ||
389 | /*------------------------------------------------------------. | |
390 | | yynewstate -- Push a new state, which is found in yystate. | | |
391 | `------------------------------------------------------------*/ | |
392 | yynewstate: | |
393 | /* In all cases, when you get here, the value and location stacks | |
394 | have just been pushed. so pushing a state here evens the stacks. | |
395 | */ | |
396 | yyssp++; | |
397 | ||
398 | yysetstate: | |
399 | *yyssp = yystate; | |
400 | ||
401 | if (yyss + yystacksize - 1 <= yyssp) { | |
402 | /* Get the current used size of the three stacks, in elements. */ | |
df35152e | 403 | const YYSIZE_T yysize = yyssp - yyss + 1; |
0de566d7 DM |
404 | |
405 | /* Extend the stack our own way. */ | |
406 | if (YYMAXDEPTH <= yystacksize) | |
407 | goto yyoverflowlab; | |
408 | yystacksize *= 2; | |
409 | if (YYMAXDEPTH < yystacksize) | |
410 | yystacksize = YYMAXDEPTH; | |
411 | ||
412 | SvGROW(yyss_sv, yystacksize * sizeof(short)); | |
413 | SvGROW(yyvs_sv, yystacksize * sizeof(YYSTYPE)); | |
414 | yyss = (short *) SvPVX(yyss_sv); | |
415 | yyvs = (YYSTYPE *) SvPVX(yyvs_sv); | |
9388183f CB |
416 | #ifdef DEBUGGING |
417 | SvGROW(yyns_sv, yystacksize * sizeof(char *)); | |
a28509cc | 418 | /* XXX This seems strange to cast char * to char ** */ |
94a11853 | 419 | yyns = (const char **) SvPVX(yyns_sv); |
9388183f CB |
420 | if (! yyns) |
421 | goto yyoverflowlab; | |
422 | yynsp = yyns + yysize - 1; | |
423 | #endif | |
0de566d7 DM |
424 | if (!yyss || ! yyvs) |
425 | goto yyoverflowlab; | |
426 | ||
427 | yyssp = yyss + yysize - 1; | |
428 | yyvsp = yyvs + yysize - 1; | |
429 | ||
430 | ||
431 | YYDPRINTF ((Perl_debug_log, "Stack size increased to %lu\n", | |
432 | (unsigned long int) yystacksize)); | |
433 | ||
434 | if (yyss + yystacksize - 1 <= yyssp) | |
435 | YYABORT; | |
93a17b20 | 436 | } |
0de566d7 | 437 | |
0de566d7 DM |
438 | goto yybackup; |
439 | ||
440 | /*-----------. | |
441 | | yybackup. | | |
442 | `-----------*/ | |
443 | yybackup: | |
444 | ||
445 | /* Do appropriate processing given the current state. */ | |
446 | /* Read a lookahead token if we need one and don't already have one. */ | |
447 | /* yyresume: */ | |
448 | ||
449 | /* First try to decide what to do without reference to lookahead token. */ | |
450 | ||
451 | yyn = yypact[yystate]; | |
452 | if (yyn == YYPACT_NINF) | |
453 | goto yydefault; | |
454 | ||
455 | /* Not known => get a lookahead token if don't already have one. */ | |
456 | ||
457 | /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ | |
458 | if (yychar == YYEMPTY) { | |
459 | YYDPRINTF ((Perl_debug_log, "Reading a token: ")); | |
81d86705 | 460 | #ifdef PERL_MAD |
00e74f14 | 461 | yychar = PL_madskills ? madlex() : yylex(); |
81d86705 | 462 | #else |
12fbd33b | 463 | yychar = yylex(); |
81d86705 | 464 | #endif |
12fbd33b DM |
465 | # ifdef EBCDIC |
466 | if (yychar >= 0 && yychar < 255) { | |
467 | yychar = NATIVE_TO_ASCII(yychar); | |
468 | } | |
469 | # endif | |
0de566d7 DM |
470 | } |
471 | ||
472 | if (yychar <= YYEOF) { | |
473 | yychar = yytoken = YYEOF; | |
474 | YYDPRINTF ((Perl_debug_log, "Now at end of input.\n")); | |
93a17b20 | 475 | } |
0de566d7 DM |
476 | else { |
477 | yytoken = YYTRANSLATE (yychar); | |
9388183f | 478 | YYDSYMPRINTF ("Next token is", yytoken, &yylval); |
93a17b20 | 479 | } |
771df094 | 480 | |
0de566d7 DM |
481 | /* If the proper action on seeing token YYTOKEN is to reduce or to |
482 | detect an error, take that action. */ | |
483 | yyn += yytoken; | |
484 | if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) | |
485 | goto yydefault; | |
486 | yyn = yytable[yyn]; | |
487 | if (yyn <= 0) { | |
488 | if (yyn == 0 || yyn == YYTABLE_NINF) | |
489 | goto yyerrlab; | |
490 | yyn = -yyn; | |
491 | goto yyreduce; | |
492 | } | |
7b57b0ea | 493 | |
0de566d7 DM |
494 | if (yyn == YYFINAL) |
495 | YYACCEPT; | |
771df094 | 496 | |
0de566d7 DM |
497 | /* Shift the lookahead token. */ |
498 | YYDPRINTF ((Perl_debug_log, "Shifting token %s, ", yytname[yytoken])); | |
499 | ||
500 | /* Discard the token being shifted unless it is eof. */ | |
501 | if (yychar != YYEOF) | |
502 | yychar = YYEMPTY; | |
503 | ||
504 | *++yyvsp = yylval; | |
9388183f | 505 | #ifdef DEBUGGING |
e1ec3a88 | 506 | *++yynsp = (const char *)(yytname[yytoken]); |
9388183f | 507 | #endif |
0de566d7 DM |
508 | |
509 | ||
510 | /* Count tokens shifted since error; after three, turn off error | |
511 | status. */ | |
512 | if (yyerrstatus) | |
513 | yyerrstatus--; | |
514 | ||
515 | yystate = yyn; | |
9388183f CB |
516 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
517 | ||
0de566d7 DM |
518 | goto yynewstate; |
519 | ||
520 | ||
521 | /*-----------------------------------------------------------. | |
522 | | yydefault -- do the default action for the current state. | | |
523 | `-----------------------------------------------------------*/ | |
524 | yydefault: | |
525 | yyn = yydefact[yystate]; | |
526 | if (yyn == 0) | |
527 | goto yyerrlab; | |
528 | goto yyreduce; | |
529 | ||
530 | ||
531 | /*-----------------------------. | |
532 | | yyreduce -- Do a reduction. | | |
533 | `-----------------------------*/ | |
534 | yyreduce: | |
535 | /* yyn is the number of a rule to reduce with. */ | |
536 | yylen = yyr2[yyn]; | |
537 | ||
538 | /* If YYLEN is nonzero, implement the default value of the action: | |
a0288114 | 539 | "$$ = $1". |
0de566d7 DM |
540 | |
541 | Otherwise, the following line sets YYVAL to garbage. | |
542 | This behavior is undocumented and Bison | |
543 | users should not rely upon it. Assigning to YYVAL | |
544 | unconditionally makes the parser a bit smaller, and it avoids a | |
545 | GCC warning that YYVAL may be used uninitialized. */ | |
546 | yyval = yyvsp[1-yylen]; | |
547 | ||
548 | ||
549 | YY_REDUCE_PRINT (yyn); | |
eb7d7d25 DM |
550 | |
551 | /* running external code may trigger a die (eg 'use nosuchmodule'): | |
552 | * record the current stack state so that an unwind will | |
553 | * free all the pesky OPs lounging around on the parse stack */ | |
554 | ss_save->yyss = yyss; | |
555 | ss_save->yyssp = yyssp; | |
556 | ss_save->yyvsp = yyvsp; | |
557 | ss_save->yylen = yylen; | |
558 | ||
0de566d7 DM |
559 | switch (yyn) { |
560 | ||
561 | /* contains all the rule actions; auto-generated from perly.y */ | |
562 | ||
563 | #define dep() deprecate("\"do\" to call subroutines") | |
564 | #include "perly.act" | |
7b57b0ea | 565 | |
93a17b20 | 566 | } |
0de566d7 DM |
567 | |
568 | yyvsp -= yylen; | |
569 | yyssp -= yylen; | |
9388183f CB |
570 | #ifdef DEBUGGING |
571 | yynsp -= yylen; | |
572 | #endif | |
0de566d7 | 573 | |
0de566d7 DM |
574 | |
575 | *++yyvsp = yyval; | |
9388183f | 576 | #ifdef DEBUGGING |
e1ec3a88 | 577 | *++yynsp = (const char *)(yytname [yyr1[yyn]]); |
9388183f | 578 | #endif |
0de566d7 | 579 | |
a0288114 | 580 | /* Now shift the result of the reduction. Determine what state |
0de566d7 DM |
581 | that goes to, based on the state we popped back to and the rule |
582 | number reduced by. */ | |
583 | ||
584 | yyn = yyr1[yyn]; | |
585 | ||
586 | yystate = yypgoto[yyn - YYNTOKENS] + *yyssp; | |
587 | if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp) | |
588 | yystate = yytable[yystate]; | |
93a17b20 | 589 | else |
0de566d7 DM |
590 | yystate = yydefgoto[yyn - YYNTOKENS]; |
591 | ||
9388183f CB |
592 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
593 | ||
594 | #ifdef DEBUGGING | |
595 | /* tmp push yystate for stack print; this is normally pushed later in | |
596 | * yynewstate */ | |
597 | yyssp++; | |
598 | *yyssp = yystate; | |
599 | YY_STACK_PRINT (yyss, yyssp, yyvs, yyns); | |
600 | yyssp--; | |
601 | #endif | |
602 | ||
0de566d7 DM |
603 | goto yynewstate; |
604 | ||
605 | ||
606 | /*------------------------------------. | |
607 | | yyerrlab -- here on detecting error | | |
608 | `------------------------------------*/ | |
609 | yyerrlab: | |
610 | /* If not already recovering from an error, report this error. */ | |
611 | if (!yyerrstatus) { | |
612 | ++yynerrs; | |
613 | #if YYERROR_VERBOSE | |
614 | yyn = yypact[yystate]; | |
615 | ||
616 | if (YYPACT_NINF < yyn && yyn < YYLAST) { | |
617 | YYSIZE_T yysize = 0; | |
df35152e | 618 | const int yytype = YYTRANSLATE (yychar); |
0de566d7 DM |
619 | char *yymsg; |
620 | int yyx, yycount; | |
621 | ||
622 | yycount = 0; | |
623 | /* Start YYX at -YYN if negative to avoid negative indexes in | |
624 | YYCHECK. */ | |
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]); | |
4b711db3 | 631 | Newx(yymsg, yysize, char *); |
0de566d7 | 632 | if (yymsg != 0) { |
df35152e | 633 | const char *yyp = yystpcpy (yymsg, "syntax error, unexpected "); |
0de566d7 DM |
634 | yyp = yystpcpy (yyp, yytname[yytype]); |
635 | ||
636 | if (yycount < 5) { | |
637 | yycount = 0; | |
638 | for (yyx = yyn < 0 ? -yyn : 0; | |
639 | yyx < (int) (sizeof (yytname) / sizeof (char *)); | |
640 | yyx++) | |
641 | { | |
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]); | |
647 | yycount++; | |
648 | } | |
649 | } | |
ecb2f335 | 650 | } |
0de566d7 DM |
651 | yyerror (yymsg); |
652 | YYSTACK_FREE (yymsg); | |
653 | } | |
654 | else | |
655 | yyerror ("syntax error; also virtual memory exhausted"); | |
656 | } | |
657 | else | |
658 | #endif /* YYERROR_VERBOSE */ | |
659 | yyerror ("syntax error"); | |
93a17b20 | 660 | } |
0de566d7 DM |
661 | |
662 | ||
663 | if (yyerrstatus == 3) { | |
664 | /* If just tried and failed to reuse lookahead token after an | |
665 | error, discard it. */ | |
666 | ||
667 | /* Return failure if at end of input. */ | |
668 | if (yychar == YYEOF) { | |
669 | /* Pop the error token. */ | |
670 | YYPOPSTACK; | |
671 | /* Pop the rest of the stack. */ | |
672 | while (yyss < yyssp) { | |
9388183f | 673 | YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp); |
0539ab63 DM |
674 | if (yy_is_opval[yystos[*yyssp]]) { |
675 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
676 | op_free(yyvsp->opval); | |
677 | } | |
0de566d7 DM |
678 | YYPOPSTACK; |
679 | } | |
680 | YYABORT; | |
681 | } | |
682 | ||
9388183f | 683 | YYDSYMPRINTF ("Error: discarding", yytoken, &yylval); |
0de566d7 DM |
684 | yychar = YYEMPTY; |
685 | ||
93a17b20 | 686 | } |
0de566d7 DM |
687 | |
688 | /* Else will try to reuse lookahead token after shifting the error | |
689 | token. */ | |
690 | goto yyerrlab1; | |
691 | ||
692 | ||
693 | /*----------------------------------------------------. | |
694 | | yyerrlab1 -- error raised explicitly by an action. | | |
695 | `----------------------------------------------------*/ | |
696 | yyerrlab1: | |
697 | yyerrstatus = 3; /* Each real token shifted decrements this. */ | |
698 | ||
699 | for (;;) { | |
700 | yyn = yypact[yystate]; | |
701 | if (yyn != YYPACT_NINF) { | |
702 | yyn += YYTERROR; | |
703 | if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) { | |
704 | yyn = yytable[yyn]; | |
705 | if (0 < yyn) | |
706 | break; | |
707 | } | |
708 | } | |
709 | ||
710 | /* Pop the current state because it cannot handle the error token. */ | |
711 | if (yyssp == yyss) | |
712 | YYABORT; | |
713 | ||
9388183f | 714 | YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp); |
0539ab63 DM |
715 | if (yy_is_opval[yystos[*yyssp]]) { |
716 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
717 | op_free(yyvsp->opval); | |
718 | } | |
0de566d7 | 719 | yyvsp--; |
9388183f CB |
720 | #ifdef DEBUGGING |
721 | yynsp--; | |
722 | #endif | |
0de566d7 DM |
723 | yystate = *--yyssp; |
724 | ||
9388183f | 725 | YY_STACK_PRINT (yyss, yyssp, yyvs, yyns); |
93a17b20 | 726 | } |
0de566d7 DM |
727 | |
728 | if (yyn == YYFINAL) | |
729 | YYACCEPT; | |
730 | ||
731 | YYDPRINTF ((Perl_debug_log, "Shifting error token, ")); | |
732 | ||
733 | *++yyvsp = yylval; | |
9388183f CB |
734 | #ifdef DEBUGGING |
735 | *++yynsp ="<err>"; | |
736 | #endif | |
0de566d7 DM |
737 | |
738 | yystate = yyn; | |
9388183f CB |
739 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
740 | ||
0de566d7 DM |
741 | goto yynewstate; |
742 | ||
743 | ||
744 | /*-------------------------------------. | |
745 | | yyacceptlab -- YYACCEPT comes here. | | |
746 | `-------------------------------------*/ | |
747 | yyacceptlab: | |
748 | yyresult = 0; | |
749 | goto yyreturn; | |
750 | ||
751 | /*-----------------------------------. | |
752 | | yyabortlab -- YYABORT comes here. | | |
753 | `-----------------------------------*/ | |
754 | yyabortlab: | |
755 | yyresult = 1; | |
756 | goto yyreturn; | |
757 | ||
758 | /*----------------------------------------------. | |
759 | | yyoverflowlab -- parser overflow comes here. | | |
760 | `----------------------------------------------*/ | |
761 | yyoverflowlab: | |
762 | yyerror ("parser stack overflow"); | |
763 | yyresult = 2; | |
764 | /* Fall through. */ | |
765 | ||
766 | yyreturn: | |
767 | ||
eb7d7d25 DM |
768 | ss_save->yyss = NULL; /* disarm parse stack cleanup */ |
769 | LEAVE; /* force stack free before we return */ | |
e1f15930 | 770 | |
0de566d7 | 771 | return yyresult; |
e1f15930 | 772 | } |
66610fdd RGS |
773 | |
774 | /* | |
775 | * Local variables: | |
776 | * c-indentation-style: bsd | |
777 | * c-basic-offset: 4 | |
778 | * indent-tabs-mode: t | |
779 | * End: | |
780 | * | |
37442d52 RGS |
781 | * ex: set ts=8 sts=4 sw=4 noet: |
782 | */ |