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0de566d7 DM |
1 | /* perly.c |
2 | * | |
bc641c27 | 3 | * Copyright (c) 2004, 2005, 2006, 2007, by 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 | |
f05e27e5 DM |
10 | * and edited; the bits that are dependent on perly.y are now |
11 | * #included from the files perly.tab and perly.act. | |
0de566d7 DM |
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. | |
bc463c31 DM |
20 | * |
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, | |
f05e27e5 DM |
23 | * but which includes extra code for dumping the parse tree. |
24 | * This is controlled by the PERL_IN_MADLY_C define. | |
0de566d7 DM |
25 | */ |
26 | ||
79072805 | 27 | #include "EXTERN.h" |
864dbfa3 | 28 | #define PERL_IN_PERLY_C |
79072805 | 29 | #include "perl.h" |
09bef843 | 30 | |
3797f23d DM |
31 | typedef unsigned char yytype_uint8; |
32 | typedef signed char yytype_int8; | |
33 | typedef unsigned short int yytype_uint16; | |
34 | typedef short int yytype_int16; | |
0de566d7 DM |
35 | typedef signed char yysigned_char; |
36 | ||
37 | #ifdef DEBUGGING | |
38 | # define YYDEBUG 1 | |
93a17b20 | 39 | #else |
0de566d7 | 40 | # define YYDEBUG 0 |
93a17b20 | 41 | #endif |
09bef843 | 42 | |
f05e27e5 DM |
43 | /* contains all the parser state tables; auto-generated from perly.y */ |
44 | #include "perly.tab" | |
0de566d7 DM |
45 | |
46 | # define YYSIZE_T size_t | |
47 | ||
0de566d7 | 48 | #define YYEOF 0 |
07a06489 | 49 | #define YYTERROR 1 |
0de566d7 DM |
50 | |
51 | #define YYACCEPT goto yyacceptlab | |
52 | #define YYABORT goto yyabortlab | |
53 | #define YYERROR goto yyerrlab1 | |
54 | ||
0de566d7 | 55 | /* Enable debugging if requested. */ |
9388183f | 56 | #ifdef DEBUGGING |
0de566d7 DM |
57 | |
58 | # define yydebug (DEBUG_p_TEST) | |
59 | ||
60 | # define YYFPRINTF PerlIO_printf | |
61 | ||
62 | # define YYDPRINTF(Args) \ | |
63 | do { \ | |
64 | if (yydebug) \ | |
65 | YYFPRINTF Args; \ | |
66 | } while (0) | |
67 | ||
9388183f | 68 | # define YYDSYMPRINTF(Title, Token, Value) \ |
0de566d7 DM |
69 | do { \ |
70 | if (yydebug) { \ | |
71 | YYFPRINTF (Perl_debug_log, "%s ", Title); \ | |
356f4fed | 72 | yysymprint (aTHX_ Perl_debug_log, Token, Value); \ |
0de566d7 DM |
73 | YYFPRINTF (Perl_debug_log, "\n"); \ |
74 | } \ | |
75 | } while (0) | |
76 | ||
77 | /*--------------------------------. | |
78 | | Print this symbol on YYOUTPUT. | | |
79 | `--------------------------------*/ | |
80 | ||
81 | static void | |
356f4fed | 82 | yysymprint(pTHX_ PerlIO * const yyoutput, int yytype, const YYSTYPE * const yyvaluep) |
0de566d7 | 83 | { |
0de566d7 DM |
84 | if (yytype < YYNTOKENS) { |
85 | YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); | |
86 | # ifdef YYPRINT | |
87 | YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); | |
9388183f | 88 | # else |
e4584336 | 89 | YYFPRINTF (yyoutput, "0x%"UVxf, (UV)yyvaluep->ival); |
0de566d7 DM |
90 | # endif |
91 | } | |
92 | else | |
93 | YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); | |
94 | ||
0de566d7 DM |
95 | YYFPRINTF (yyoutput, ")"); |
96 | } | |
97 | ||
98 | ||
9388183f | 99 | /* yy_stack_print() |
1654d593 DM |
100 | * print the top 8 items on the parse stack. |
101 | */ | |
0de566d7 DM |
102 | |
103 | static void | |
1654d593 | 104 | yy_stack_print (pTHX_ const yy_parser *parser) |
0de566d7 | 105 | { |
1654d593 | 106 | const yy_stack_frame *ps, *min; |
9388183f | 107 | |
2d29f438 | 108 | min = parser->ps - 8 + 1; |
22735491 DM |
109 | if (min <= parser->stack) |
110 | min = parser->stack + 1; | |
9388183f CB |
111 | |
112 | PerlIO_printf(Perl_debug_log, "\nindex:"); | |
1654d593 | 113 | for (ps = min; ps <= parser->ps; ps++) |
00c0e1ee | 114 | PerlIO_printf(Perl_debug_log, " %8d", (int)(ps - parser->stack)); |
1654d593 | 115 | |
9388183f | 116 | PerlIO_printf(Perl_debug_log, "\nstate:"); |
1654d593 DM |
117 | for (ps = min; ps <= parser->ps; ps++) |
118 | PerlIO_printf(Perl_debug_log, " %8d", ps->state); | |
119 | ||
9388183f | 120 | PerlIO_printf(Perl_debug_log, "\ntoken:"); |
1654d593 DM |
121 | for (ps = min; ps <= parser->ps; ps++) |
122 | PerlIO_printf(Perl_debug_log, " %8.8s", ps->name); | |
123 | ||
9388183f | 124 | PerlIO_printf(Perl_debug_log, "\nvalue:"); |
1654d593 DM |
125 | for (ps = min; ps <= parser->ps; ps++) { |
126 | switch (yy_type_tab[yystos[ps->state]]) { | |
d5c6462e | 127 | case toketype_opval: |
21612876 | 128 | PerlIO_printf(Perl_debug_log, " %8.8s", |
1654d593 DM |
129 | ps->val.opval |
130 | ? PL_op_name[ps->val.opval->op_type] | |
670f3923 | 131 | : "(Nullop)" |
21612876 | 132 | ); |
d5c6462e DM |
133 | break; |
134 | #ifndef PERL_IN_MADLY_C | |
135 | case toketype_p_tkval: | |
136 | PerlIO_printf(Perl_debug_log, " %8.8s", | |
1654d593 | 137 | ps->val.pval ? ps->val.pval : "(NULL)"); |
d5c6462e DM |
138 | break; |
139 | ||
140 | case toketype_i_tkval: | |
141 | #endif | |
142 | case toketype_ival: | |
1654d593 | 143 | PerlIO_printf(Perl_debug_log, " %8"IVdf, (IV)ps->val.ival); |
d5c6462e DM |
144 | break; |
145 | default: | |
1654d593 | 146 | PerlIO_printf(Perl_debug_log, " %8"UVxf, (UV)ps->val.ival); |
d5c6462e | 147 | } |
21612876 | 148 | } |
9388183f | 149 | PerlIO_printf(Perl_debug_log, "\n\n"); |
0de566d7 DM |
150 | } |
151 | ||
1654d593 DM |
152 | # define YY_STACK_PRINT(parser) \ |
153 | do { \ | |
154 | if (yydebug && DEBUG_v_TEST) \ | |
155 | yy_stack_print (aTHX_ parser); \ | |
0de566d7 DM |
156 | } while (0) |
157 | ||
09bef843 | 158 | |
0de566d7 DM |
159 | /*------------------------------------------------. |
160 | | Report that the YYRULE is going to be reduced. | | |
161 | `------------------------------------------------*/ | |
162 | ||
163 | static void | |
164 | yy_reduce_print (pTHX_ int yyrule) | |
165 | { | |
166 | int yyi; | |
df35152e | 167 | const unsigned int yylineno = yyrline[yyrule]; |
0de566d7 DM |
168 | YYFPRINTF (Perl_debug_log, "Reducing stack by rule %d (line %u), ", |
169 | yyrule - 1, yylineno); | |
170 | /* Print the symbols being reduced, and their result. */ | |
171 | for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++) | |
172 | YYFPRINTF (Perl_debug_log, "%s ", yytname [yyrhs[yyi]]); | |
173 | YYFPRINTF (Perl_debug_log, "-> %s\n", yytname [yyr1[yyrule]]); | |
174 | } | |
175 | ||
176 | # define YY_REDUCE_PRINT(Rule) \ | |
177 | do { \ | |
178 | if (yydebug) \ | |
179 | yy_reduce_print (aTHX_ Rule); \ | |
180 | } while (0) | |
181 | ||
182 | #else /* !DEBUGGING */ | |
183 | # define YYDPRINTF(Args) | |
9388183f | 184 | # define YYDSYMPRINTF(Title, Token, Value) |
1654d593 | 185 | # define YY_STACK_PRINT(parser) |
0de566d7 DM |
186 | # define YY_REDUCE_PRINT(Rule) |
187 | #endif /* !DEBUGGING */ | |
188 | ||
718a7425 DM |
189 | /* called during cleanup (via SAVEDESTRUCTOR_X) to free any items on the |
190 | * parse stack, thus avoiding leaks if we die */ | |
191 | ||
192 | static void | |
22735491 | 193 | S_clear_yystack(pTHX_ const yy_parser *parser) |
718a7425 | 194 | { |
1654d593 | 195 | yy_stack_frame *ps = parser->ps; |
670f3923 | 196 | int i; |
718a7425 | 197 | |
199e78b7 | 198 | if (!parser->stack || ps == parser->stack) |
718a7425 | 199 | return; |
1654d593 | 200 | |
718a7425 | 201 | YYDPRINTF ((Perl_debug_log, "clearing the parse stack\n")); |
670f3923 | 202 | |
7e5d8ed2 DM |
203 | /* Freeing ops on the stack, and the op_latefree / op_latefreed / |
204 | * op_attached flags: | |
670f3923 DM |
205 | * |
206 | * When we pop tokens off the stack during error recovery, or when | |
207 | * we pop all the tokens off the stack after a die during a shift or | |
7e5d8ed2 DM |
208 | * reduce (i.e. Perl_croak somewhere in yylex() or in one of the |
209 | * newFOO() functions), then it's possible that some of these tokens are | |
670f3923 DM |
210 | * of type opval, pointing to an OP. All these ops are orphans; each is |
211 | * its own miniature subtree that has not yet been attached to a | |
7e5d8ed2 DM |
212 | * larger tree. In this case, we should clearly free the op (making |
213 | * sure, for each op we free that we have PL_comppad pointing to the | |
670f3923 DM |
214 | * right place for freeing any SVs attached to the op in threaded |
215 | * builds. | |
216 | * | |
7e5d8ed2 | 217 | * However, there is a particular problem if we die in newFOO() called |
670f3923 DM |
218 | * by a reducing action; e.g. |
219 | * | |
220 | * foo : bar baz boz | |
221 | * { $$ = newFOO($1,$2,$3) } | |
222 | * | |
223 | * where | |
7e5d8ed2 | 224 | * OP *newFOO { ....; if (...) croak; .... } |
670f3923 DM |
225 | * |
226 | * In this case, when we come to clean bar baz and boz off the stack, | |
227 | * we don't know whether newFOO() has already: | |
228 | * * freed them | |
7e5d8ed2 | 229 | * * left them as is |
670f3923 | 230 | * * attached them to part of a larger tree |
7e5d8ed2 DM |
231 | * * attached them to PL_compcv |
232 | * * attached them to PL_compcv then freed it (as in BEGIN {die } ) | |
670f3923 DM |
233 | * |
234 | * To get round this problem, we set the flag op_latefree on every op | |
235 | * that gets pushed onto the parser stack. If op_free() sees this | |
236 | * flag, it clears the op and frees any children,, but *doesn't* free | |
237 | * the op itself; instead it sets the op_latefreed flag. This means | |
238 | * that we can safely call op_free() multiple times on each stack op. | |
239 | * So, when clearing the stack, we first, for each op that was being | |
240 | * reduced, call op_free with op_latefree=1. This ensures that all ops | |
241 | * hanging off these op are freed, but the reducing ops themselces are | |
242 | * just undefed. Then we set op_latefreed=0 on *all* ops on the stack | |
7e5d8ed2 DM |
243 | * and free them. A little thought should convince you that this |
244 | * two-part approach to the reducing ops should handle the first three | |
245 | * cases above safely. | |
246 | * | |
247 | * In the case of attaching to PL_compcv (currently just newATTRSUB | |
248 | * does this), then we set the op_attached flag on the op that has | |
249 | * been so attached, then avoid doing the final op_free during | |
250 | * cleanup, on the assumption that it will happen (or has already | |
251 | * happened) when PL_compcv is freed. | |
252 | * | |
253 | * Note this is fairly fragile mechanism. A more robust approach | |
254 | * would be to use two of these flag bits as 2-bit reference count | |
255 | * field for each op, indicating whether it is pointed to from: | |
256 | * * a parent op | |
257 | * * the parser stack | |
258 | * * a CV | |
259 | * but this would involve reworking all code (core and external) that | |
260 | * manipulate op trees. | |
0aded6e1 DM |
261 | * |
262 | * XXX DAPM 17/1/07 I've decided its too fragile for now, and so have | |
263 | * disabled it */ | |
264 | ||
265 | #define DISABLE_STACK_FREE | |
670f3923 | 266 | |
0aded6e1 DM |
267 | |
268 | #ifdef DISABLE_STACK_FREE | |
269 | ps -= parser->yylen; | |
270 | PERL_UNUSED_VAR(i); | |
271 | #else | |
7e5d8ed2 | 272 | /* clear any reducing ops (1st pass) */ |
670f3923 | 273 | |
5912531f | 274 | for (i=0; i< parser->yylen; i++) { |
1654d593 DM |
275 | if (yy_type_tab[yystos[ps[-i].state]] == toketype_opval |
276 | && ps[-i].val.opval) { | |
7e5d8ed2 DM |
277 | if ( ! (ps[-i].val.opval->op_attached |
278 | && !ps[-i].val.opval->op_latefreed)) | |
279 | { | |
280 | if (ps[-i].comppad != PL_comppad) { | |
281 | PAD_RESTORE_LOCAL(ps[-i].comppad); | |
282 | } | |
283 | op_free(ps[-i].val.opval); | |
670f3923 | 284 | } |
670f3923 DM |
285 | } |
286 | } | |
0aded6e1 | 287 | #endif |
670f3923 DM |
288 | |
289 | /* now free whole the stack, including the just-reduced ops */ | |
290 | ||
22735491 | 291 | while (ps > parser->stack) { |
1654d593 DM |
292 | if (yy_type_tab[yystos[ps->state]] == toketype_opval |
293 | && ps->val.opval) | |
670f3923 | 294 | { |
1654d593 DM |
295 | if (ps->comppad != PL_comppad) { |
296 | PAD_RESTORE_LOCAL(ps->comppad); | |
718a7425 DM |
297 | } |
298 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
0aded6e1 | 299 | #ifndef DISABLE_STACK_FREE |
1654d593 | 300 | ps->val.opval->op_latefree = 0; |
7e5d8ed2 | 301 | if (!(ps->val.opval->op_attached && !ps->val.opval->op_latefreed)) |
0aded6e1 | 302 | #endif |
7e5d8ed2 | 303 | op_free(ps->val.opval); |
718a7425 | 304 | } |
1654d593 | 305 | ps--; |
718a7425 DM |
306 | } |
307 | } | |
308 | ||
22735491 DM |
309 | /* delete a parser object */ |
310 | ||
93c535ac | 311 | #ifndef PERL_IN_MADLY_C |
acdf0a21 DM |
312 | void |
313 | Perl_parser_free(pTHX_ const yy_parser *parser) | |
22735491 DM |
314 | { |
315 | S_clear_yystack(aTHX_ parser); | |
316 | Safefree(parser->stack); | |
7d84b8ac DM |
317 | Safefree(parser->lex_brackstack); |
318 | Safefree(parser->lex_casestack); | |
22735491 | 319 | PL_parser = parser->old_parser; |
7d84b8ac | 320 | Safefree(parser); |
22735491 | 321 | } |
93c535ac | 322 | #endif |
718a7425 | 323 | |
0de566d7 DM |
324 | /*----------. |
325 | | yyparse. | | |
326 | `----------*/ | |
327 | ||
79072805 | 328 | int |
bc463c31 DM |
329 | #ifdef PERL_IN_MADLY_C |
330 | Perl_madparse (pTHX) | |
331 | #else | |
0de566d7 | 332 | Perl_yyparse (pTHX) |
bc463c31 | 333 | #endif |
79072805 | 334 | { |
97aff369 | 335 | dVAR; |
0de566d7 DM |
336 | register int yystate; |
337 | register int yyn; | |
338 | int yyresult; | |
339 | ||
0de566d7 | 340 | /* Lookahead token as an internal (translated) token number. */ |
714c8e96 | 341 | int yytoken = 0; |
0de566d7 | 342 | |
5912531f | 343 | register yy_parser *parser; /* the parser object */ |
1654d593 | 344 | register yy_stack_frame *ps; /* current parser stack frame */ |
a0d0e21e | 345 | |
1654d593 DM |
346 | #define YYPOPSTACK parser->ps = --ps |
347 | #define YYPUSHSTACK parser->ps = ++ps | |
0de566d7 | 348 | |
acdf0a21 | 349 | /* The variable used to return semantic value and location from the |
5912531f | 350 | action routines: ie $$. */ |
0de566d7 DM |
351 | YYSTYPE yyval; |
352 | ||
bc463c31 DM |
353 | #ifndef PERL_IN_MADLY_C |
354 | # ifdef PERL_MAD | |
00e74f14 NC |
355 | if (PL_madskills) |
356 | return madparse(); | |
bc463c31 | 357 | # endif |
81d86705 NC |
358 | #endif |
359 | ||
0de566d7 DM |
360 | YYDPRINTF ((Perl_debug_log, "Starting parse\n")); |
361 | ||
acdf0a21 DM |
362 | parser = PL_parser; |
363 | ps = parser->ps; | |
1654d593 | 364 | |
22735491 | 365 | ENTER; /* force parser free before we return */ |
7c197c94 | 366 | SAVEPARSER(parser); |
0de566d7 | 367 | |
0de566d7 DM |
368 | /*------------------------------------------------------------. |
369 | | yynewstate -- Push a new state, which is found in yystate. | | |
370 | `------------------------------------------------------------*/ | |
371 | yynewstate: | |
0de566d7 | 372 | |
1654d593 | 373 | yystate = ps->state; |
05a03161 | 374 | |
670f3923 | 375 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
0de566d7 | 376 | |
0aded6e1 | 377 | #ifndef DISABLE_STACK_FREE |
1654d593 DM |
378 | if (yy_type_tab[yystos[yystate]] == toketype_opval && ps->val.opval) { |
379 | ps->val.opval->op_latefree = 1; | |
380 | ps->val.opval->op_latefreed = 0; | |
670f3923 | 381 | } |
0aded6e1 | 382 | #endif |
670f3923 | 383 | |
5912531f | 384 | parser->yylen = 0; |
0de566d7 | 385 | |
1654d593 | 386 | { |
22735491 | 387 | size_t size = ps - parser->stack + 1; |
0de566d7 | 388 | |
1654d593 DM |
389 | /* grow the stack? We always leave 1 spare slot, |
390 | * in case of a '' -> 'foo' reduction */ | |
0de566d7 | 391 | |
85c508c3 | 392 | if (size >= (size_t)parser->stack_size - 1) { |
1654d593 DM |
393 | /* this will croak on insufficient memory */ |
394 | parser->stack_size *= 2; | |
22735491 DM |
395 | Renew(parser->stack, parser->stack_size, yy_stack_frame); |
396 | ps = parser->ps = parser->stack + size -1; | |
670f3923 | 397 | |
1654d593 DM |
398 | YYDPRINTF((Perl_debug_log, |
399 | "parser stack size increased to %lu frames\n", | |
400 | (unsigned long int)parser->stack_size)); | |
401 | } | |
93a17b20 | 402 | } |
0de566d7 | 403 | |
0de566d7 DM |
404 | /* Do appropriate processing given the current state. */ |
405 | /* Read a lookahead token if we need one and don't already have one. */ | |
0de566d7 DM |
406 | |
407 | /* First try to decide what to do without reference to lookahead token. */ | |
408 | ||
409 | yyn = yypact[yystate]; | |
410 | if (yyn == YYPACT_NINF) | |
411 | goto yydefault; | |
412 | ||
413 | /* Not known => get a lookahead token if don't already have one. */ | |
414 | ||
415 | /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ | |
5912531f | 416 | if (parser->yychar == YYEMPTY) { |
0de566d7 | 417 | YYDPRINTF ((Perl_debug_log, "Reading a token: ")); |
f05e27e5 | 418 | #ifdef PERL_IN_MADLY_C |
5912531f | 419 | parser->yychar = PL_madskills ? madlex() : yylex(); |
f05e27e5 | 420 | #else |
5912531f | 421 | parser->yychar = yylex(); |
81d86705 | 422 | #endif |
bc463c31 | 423 | |
12fbd33b | 424 | # ifdef EBCDIC |
5912531f DM |
425 | if (parser->yychar >= 0 && parser->yychar < 255) { |
426 | parser->yychar = NATIVE_TO_ASCII(parser->yychar); | |
12fbd33b DM |
427 | } |
428 | # endif | |
0de566d7 DM |
429 | } |
430 | ||
5912531f DM |
431 | if (parser->yychar <= YYEOF) { |
432 | parser->yychar = yytoken = YYEOF; | |
0de566d7 | 433 | YYDPRINTF ((Perl_debug_log, "Now at end of input.\n")); |
93a17b20 | 434 | } |
0de566d7 | 435 | else { |
5912531f DM |
436 | yytoken = YYTRANSLATE (parser->yychar); |
437 | YYDSYMPRINTF ("Next token is", yytoken, &parser->yylval); | |
93a17b20 | 438 | } |
771df094 | 439 | |
0de566d7 DM |
440 | /* If the proper action on seeing token YYTOKEN is to reduce or to |
441 | detect an error, take that action. */ | |
442 | yyn += yytoken; | |
443 | if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken) | |
444 | goto yydefault; | |
445 | yyn = yytable[yyn]; | |
446 | if (yyn <= 0) { | |
447 | if (yyn == 0 || yyn == YYTABLE_NINF) | |
448 | goto yyerrlab; | |
449 | yyn = -yyn; | |
450 | goto yyreduce; | |
451 | } | |
7b57b0ea | 452 | |
0de566d7 DM |
453 | if (yyn == YYFINAL) |
454 | YYACCEPT; | |
771df094 | 455 | |
0de566d7 DM |
456 | /* Shift the lookahead token. */ |
457 | YYDPRINTF ((Perl_debug_log, "Shifting token %s, ", yytname[yytoken])); | |
458 | ||
459 | /* Discard the token being shifted unless it is eof. */ | |
5912531f DM |
460 | if (parser->yychar != YYEOF) |
461 | parser->yychar = YYEMPTY; | |
0de566d7 | 462 | |
1654d593 DM |
463 | YYPUSHSTACK; |
464 | ps->state = yyn; | |
5912531f | 465 | ps->val = parser->yylval; |
1654d593 | 466 | ps->comppad = PL_comppad; |
9388183f | 467 | #ifdef DEBUGGING |
1654d593 | 468 | ps->name = (const char *)(yytname[yytoken]); |
9388183f | 469 | #endif |
0de566d7 | 470 | |
0de566d7 DM |
471 | /* Count tokens shifted since error; after three, turn off error |
472 | status. */ | |
5912531f DM |
473 | if (parser->yyerrstatus) |
474 | parser->yyerrstatus--; | |
0de566d7 | 475 | |
0de566d7 DM |
476 | goto yynewstate; |
477 | ||
478 | ||
479 | /*-----------------------------------------------------------. | |
480 | | yydefault -- do the default action for the current state. | | |
481 | `-----------------------------------------------------------*/ | |
482 | yydefault: | |
483 | yyn = yydefact[yystate]; | |
484 | if (yyn == 0) | |
485 | goto yyerrlab; | |
486 | goto yyreduce; | |
487 | ||
488 | ||
489 | /*-----------------------------. | |
490 | | yyreduce -- Do a reduction. | | |
491 | `-----------------------------*/ | |
492 | yyreduce: | |
493 | /* yyn is the number of a rule to reduce with. */ | |
5912531f | 494 | parser->yylen = yyr2[yyn]; |
0de566d7 DM |
495 | |
496 | /* If YYLEN is nonzero, implement the default value of the action: | |
a0288114 | 497 | "$$ = $1". |
0de566d7 DM |
498 | |
499 | Otherwise, the following line sets YYVAL to garbage. | |
500 | This behavior is undocumented and Bison | |
501 | users should not rely upon it. Assigning to YYVAL | |
502 | unconditionally makes the parser a bit smaller, and it avoids a | |
503 | GCC warning that YYVAL may be used uninitialized. */ | |
5912531f | 504 | yyval = ps[1-parser->yylen].val; |
0de566d7 | 505 | |
1654d593 | 506 | YY_STACK_PRINT(parser); |
0de566d7 | 507 | YY_REDUCE_PRINT (yyn); |
718a7425 | 508 | |
0de566d7 DM |
509 | switch (yyn) { |
510 | ||
0de566d7 DM |
511 | |
512 | #define dep() deprecate("\"do\" to call subroutines") | |
f05e27e5 | 513 | |
bc463c31 | 514 | #ifdef PERL_IN_MADLY_C |
f05e27e5 DM |
515 | # define IVAL(i) (i)->tk_lval.ival |
516 | # define PVAL(p) (p)->tk_lval.pval | |
517 | # define TOKEN_GETMAD(a,b,c) token_getmad((a),(b),(c)) | |
518 | # define TOKEN_FREE(a) token_free(a) | |
519 | # define OP_GETMAD(a,b,c) op_getmad((a),(b),(c)) | |
520 | # define IF_MAD(a,b) (a) | |
521 | # define DO_MAD(a) a | |
522 | # define MAD | |
bc463c31 | 523 | #else |
f05e27e5 DM |
524 | # define IVAL(i) (i) |
525 | # define PVAL(p) (p) | |
526 | # define TOKEN_GETMAD(a,b,c) | |
527 | # define TOKEN_FREE(a) | |
528 | # define OP_GETMAD(a,b,c) | |
529 | # define IF_MAD(a,b) (b) | |
530 | # define DO_MAD(a) | |
531 | # undef MAD | |
bc463c31 | 532 | #endif |
7b57b0ea | 533 | |
f05e27e5 DM |
534 | /* contains all the rule actions; auto-generated from perly.y */ |
535 | #include "perly.act" | |
536 | ||
93a17b20 | 537 | } |
0de566d7 | 538 | |
0aded6e1 | 539 | #ifndef DISABLE_STACK_FREE |
670f3923 DM |
540 | /* any just-reduced ops with the op_latefreed flag cleared need to be |
541 | * freed; the rest need the flag resetting */ | |
542 | { | |
543 | int i; | |
5912531f | 544 | for (i=0; i< parser->yylen; i++) { |
1654d593 DM |
545 | if (yy_type_tab[yystos[ps[-i].state]] == toketype_opval |
546 | && ps[-i].val.opval) | |
670f3923 | 547 | { |
1654d593 DM |
548 | ps[-i].val.opval->op_latefree = 0; |
549 | if (ps[-i].val.opval->op_latefreed) | |
550 | op_free(ps[-i].val.opval); | |
670f3923 DM |
551 | } |
552 | } | |
553 | } | |
0aded6e1 | 554 | #endif |
670f3923 | 555 | |
5912531f | 556 | parser->ps = ps -= (parser->yylen-1); |
0de566d7 | 557 | |
05a03161 DM |
558 | /* Now shift the result of the reduction. Determine what state |
559 | that goes to, based on the state we popped back to and the rule | |
560 | number reduced by. */ | |
561 | ||
1654d593 DM |
562 | ps->val = yyval; |
563 | ps->comppad = PL_comppad; | |
9388183f | 564 | #ifdef DEBUGGING |
1654d593 | 565 | ps->name = (const char *)(yytname [yyr1[yyn]]); |
9388183f | 566 | #endif |
0de566d7 DM |
567 | |
568 | yyn = yyr1[yyn]; | |
569 | ||
1654d593 DM |
570 | yystate = yypgoto[yyn - YYNTOKENS] + ps[-1].state; |
571 | if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == ps[-1].state) | |
0de566d7 | 572 | yystate = yytable[yystate]; |
93a17b20 | 573 | else |
0de566d7 | 574 | yystate = yydefgoto[yyn - YYNTOKENS]; |
1654d593 | 575 | ps->state = yystate; |
05a03161 | 576 | |
0de566d7 DM |
577 | goto yynewstate; |
578 | ||
579 | ||
580 | /*------------------------------------. | |
581 | | yyerrlab -- here on detecting error | | |
582 | `------------------------------------*/ | |
583 | yyerrlab: | |
584 | /* If not already recovering from an error, report this error. */ | |
5912531f | 585 | if (!parser->yyerrstatus) { |
07a06489 | 586 | yyerror ("syntax error"); |
93a17b20 | 587 | } |
0de566d7 DM |
588 | |
589 | ||
5912531f | 590 | if (parser->yyerrstatus == 3) { |
0de566d7 DM |
591 | /* If just tried and failed to reuse lookahead token after an |
592 | error, discard it. */ | |
593 | ||
594 | /* Return failure if at end of input. */ | |
5912531f | 595 | if (parser->yychar == YYEOF) { |
0de566d7 DM |
596 | /* Pop the error token. */ |
597 | YYPOPSTACK; | |
598 | /* Pop the rest of the stack. */ | |
22735491 | 599 | while (ps > parser->stack) { |
1654d593 DM |
600 | YYDSYMPRINTF ("Error: popping", yystos[ps->state], &ps->val); |
601 | if (yy_type_tab[yystos[ps->state]] == toketype_opval | |
602 | && ps->val.opval) | |
670f3923 | 603 | { |
0539ab63 | 604 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); |
1654d593 DM |
605 | if (ps->comppad != PL_comppad) { |
606 | PAD_RESTORE_LOCAL(ps->comppad); | |
718a7425 | 607 | } |
1654d593 DM |
608 | ps->val.opval->op_latefree = 0; |
609 | op_free(ps->val.opval); | |
0539ab63 | 610 | } |
0de566d7 DM |
611 | YYPOPSTACK; |
612 | } | |
613 | YYABORT; | |
614 | } | |
615 | ||
5912531f DM |
616 | YYDSYMPRINTF ("Error: discarding", yytoken, &parser->yylval); |
617 | parser->yychar = YYEMPTY; | |
0de566d7 | 618 | |
93a17b20 | 619 | } |
0de566d7 DM |
620 | |
621 | /* Else will try to reuse lookahead token after shifting the error | |
622 | token. */ | |
623 | goto yyerrlab1; | |
624 | ||
625 | ||
626 | /*----------------------------------------------------. | |
627 | | yyerrlab1 -- error raised explicitly by an action. | | |
628 | `----------------------------------------------------*/ | |
629 | yyerrlab1: | |
5912531f | 630 | parser->yyerrstatus = 3; /* Each real token shifted decrements this. */ |
0de566d7 DM |
631 | |
632 | for (;;) { | |
633 | yyn = yypact[yystate]; | |
634 | if (yyn != YYPACT_NINF) { | |
635 | yyn += YYTERROR; | |
636 | if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) { | |
637 | yyn = yytable[yyn]; | |
638 | if (0 < yyn) | |
639 | break; | |
640 | } | |
641 | } | |
642 | ||
643 | /* Pop the current state because it cannot handle the error token. */ | |
22735491 | 644 | if (ps == parser->stack) |
0de566d7 DM |
645 | YYABORT; |
646 | ||
1654d593 DM |
647 | YYDSYMPRINTF ("Error: popping", yystos[ps->state], &ps->val); |
648 | if (yy_type_tab[yystos[ps->state]] == toketype_opval && ps->val.opval) { | |
0539ab63 | 649 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); |
1654d593 DM |
650 | if (ps->comppad != PL_comppad) { |
651 | PAD_RESTORE_LOCAL(ps->comppad); | |
718a7425 | 652 | } |
1654d593 DM |
653 | ps->val.opval->op_latefree = 0; |
654 | op_free(ps->val.opval); | |
0539ab63 | 655 | } |
1654d593 DM |
656 | YYPOPSTACK; |
657 | yystate = ps->state; | |
0de566d7 | 658 | |
1654d593 | 659 | YY_STACK_PRINT(parser); |
93a17b20 | 660 | } |
0de566d7 DM |
661 | |
662 | if (yyn == YYFINAL) | |
663 | YYACCEPT; | |
664 | ||
665 | YYDPRINTF ((Perl_debug_log, "Shifting error token, ")); | |
666 | ||
1654d593 DM |
667 | YYPUSHSTACK; |
668 | ps->state = yyn; | |
5912531f | 669 | ps->val = parser->yylval; |
1654d593 | 670 | ps->comppad = PL_comppad; |
9388183f | 671 | #ifdef DEBUGGING |
1654d593 | 672 | ps->name ="<err>"; |
9388183f | 673 | #endif |
0de566d7 | 674 | |
0de566d7 DM |
675 | goto yynewstate; |
676 | ||
677 | ||
678 | /*-------------------------------------. | |
679 | | yyacceptlab -- YYACCEPT comes here. | | |
680 | `-------------------------------------*/ | |
681 | yyacceptlab: | |
682 | yyresult = 0; | |
22735491 | 683 | parser->ps = parser->stack; /* disable cleanup */ |
0de566d7 DM |
684 | goto yyreturn; |
685 | ||
686 | /*-----------------------------------. | |
687 | | yyabortlab -- YYABORT comes here. | | |
688 | `-----------------------------------*/ | |
689 | yyabortlab: | |
690 | yyresult = 1; | |
691 | goto yyreturn; | |
692 | ||
0de566d7 | 693 | yyreturn: |
22735491 | 694 | LEAVE; /* force parser free before we return */ |
0de566d7 | 695 | return yyresult; |
e1f15930 | 696 | } |
66610fdd RGS |
697 | |
698 | /* | |
699 | * Local variables: | |
700 | * c-indentation-style: bsd | |
701 | * c-basic-offset: 4 | |
702 | * indent-tabs-mode: t | |
703 | * End: | |
704 | * | |
37442d52 RGS |
705 | * ex: set ts=8 sts=4 sw=4 noet: |
706 | */ |