Commit | Line | Data |
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0de566d7 DM |
1 | /* perly.c |
2 | * | |
2eee27d7 SS |
3 | * Copyright (c) 2004, 2005, 2006, 2007, 2008, |
4 | * 2009, 2010, 2011 by Larry Wall and others | |
0de566d7 DM |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
9 | * Note that this file was originally generated as an output from | |
10 | * GNU bison version 1.875, but now the code is statically maintained | |
f05e27e5 DM |
11 | * and edited; the bits that are dependent on perly.y are now |
12 | * #included from the files perly.tab and perly.act. | |
0de566d7 DM |
13 | * |
14 | * Here is an important copyright statement from the original, generated | |
15 | * file: | |
16 | * | |
17 | * As a special exception, when this file is copied by Bison into a | |
18 | * Bison output file, you may use that output file without | |
19 | * restriction. This special exception was added by the Free | |
20 | * Software Foundation in version 1.24 of Bison. | |
bc463c31 | 21 | * |
0de566d7 DM |
22 | */ |
23 | ||
79072805 | 24 | #include "EXTERN.h" |
864dbfa3 | 25 | #define PERL_IN_PERLY_C |
79072805 | 26 | #include "perl.h" |
30d9c59b | 27 | #include "feature.h" |
d3d9da4a | 28 | #include "keywords.h" |
09bef843 | 29 | |
3797f23d DM |
30 | typedef unsigned char yytype_uint8; |
31 | typedef signed char yytype_int8; | |
32 | typedef unsigned short int yytype_uint16; | |
33 | typedef short int yytype_int16; | |
0de566d7 DM |
34 | typedef signed char yysigned_char; |
35 | ||
28ac2b49 Z |
36 | /* YYINITDEPTH -- initial size of the parser's stacks. */ |
37 | #define YYINITDEPTH 200 | |
38 | ||
599f1ac6 FC |
39 | #ifdef YYDEBUG |
40 | # undef YYDEBUG | |
41 | #endif | |
42 | #ifdef DEBUGGING | |
43 | # define YYDEBUG 1 | |
44 | #else | |
45 | # define YYDEBUG 0 | |
46 | #endif | |
47 | ||
b3045d9c FC |
48 | #ifndef YY_NULL |
49 | # define YY_NULL 0 | |
93a17b20 | 50 | #endif |
09bef843 | 51 | |
f39ff1f3 DM |
52 | #ifndef YY_NULLPTR |
53 | # define YY_NULLPTR NULL | |
54 | #endif | |
55 | ||
f05e27e5 DM |
56 | /* contains all the parser state tables; auto-generated from perly.y */ |
57 | #include "perly.tab" | |
0de566d7 DM |
58 | |
59 | # define YYSIZE_T size_t | |
60 | ||
0de566d7 | 61 | #define YYEOF 0 |
07a06489 | 62 | #define YYTERROR 1 |
0de566d7 DM |
63 | |
64 | #define YYACCEPT goto yyacceptlab | |
65 | #define YYABORT goto yyabortlab | |
66 | #define YYERROR goto yyerrlab1 | |
67 | ||
0de566d7 | 68 | /* Enable debugging if requested. */ |
9388183f | 69 | #ifdef DEBUGGING |
0de566d7 DM |
70 | |
71 | # define yydebug (DEBUG_p_TEST) | |
72 | ||
73 | # define YYFPRINTF PerlIO_printf | |
74 | ||
75 | # define YYDPRINTF(Args) \ | |
76 | do { \ | |
77 | if (yydebug) \ | |
78 | YYFPRINTF Args; \ | |
79 | } while (0) | |
80 | ||
9388183f | 81 | # define YYDSYMPRINTF(Title, Token, Value) \ |
0de566d7 DM |
82 | do { \ |
83 | if (yydebug) { \ | |
84 | YYFPRINTF (Perl_debug_log, "%s ", Title); \ | |
356f4fed | 85 | yysymprint (aTHX_ Perl_debug_log, Token, Value); \ |
0de566d7 DM |
86 | YYFPRINTF (Perl_debug_log, "\n"); \ |
87 | } \ | |
88 | } while (0) | |
89 | ||
90 | /*--------------------------------. | |
91 | | Print this symbol on YYOUTPUT. | | |
92 | `--------------------------------*/ | |
93 | ||
94 | static void | |
356f4fed | 95 | yysymprint(pTHX_ PerlIO * const yyoutput, int yytype, const YYSTYPE * const yyvaluep) |
0de566d7 | 96 | { |
dc3bf405 | 97 | PERL_UNUSED_CONTEXT; |
0de566d7 DM |
98 | if (yytype < YYNTOKENS) { |
99 | YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); | |
100 | # ifdef YYPRINT | |
101 | YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); | |
9388183f | 102 | # else |
147e3846 | 103 | YYFPRINTF (yyoutput, "0x%" UVxf, (UV)yyvaluep->ival); |
0de566d7 DM |
104 | # endif |
105 | } | |
106 | else | |
107 | YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); | |
108 | ||
0de566d7 DM |
109 | YYFPRINTF (yyoutput, ")"); |
110 | } | |
111 | ||
112 | ||
9388183f | 113 | /* yy_stack_print() |
1654d593 DM |
114 | * print the top 8 items on the parse stack. |
115 | */ | |
0de566d7 DM |
116 | |
117 | static void | |
1654d593 | 118 | yy_stack_print (pTHX_ const yy_parser *parser) |
0de566d7 | 119 | { |
1654d593 | 120 | const yy_stack_frame *ps, *min; |
9388183f | 121 | |
2d29f438 | 122 | min = parser->ps - 8 + 1; |
22735491 DM |
123 | if (min <= parser->stack) |
124 | min = parser->stack + 1; | |
9388183f CB |
125 | |
126 | PerlIO_printf(Perl_debug_log, "\nindex:"); | |
1654d593 | 127 | for (ps = min; ps <= parser->ps; ps++) |
00c0e1ee | 128 | PerlIO_printf(Perl_debug_log, " %8d", (int)(ps - parser->stack)); |
1654d593 | 129 | |
9388183f | 130 | PerlIO_printf(Perl_debug_log, "\nstate:"); |
1654d593 DM |
131 | for (ps = min; ps <= parser->ps; ps++) |
132 | PerlIO_printf(Perl_debug_log, " %8d", ps->state); | |
133 | ||
9388183f | 134 | PerlIO_printf(Perl_debug_log, "\ntoken:"); |
1654d593 DM |
135 | for (ps = min; ps <= parser->ps; ps++) |
136 | PerlIO_printf(Perl_debug_log, " %8.8s", ps->name); | |
137 | ||
9388183f | 138 | PerlIO_printf(Perl_debug_log, "\nvalue:"); |
1654d593 DM |
139 | for (ps = min; ps <= parser->ps; ps++) { |
140 | switch (yy_type_tab[yystos[ps->state]]) { | |
d5c6462e | 141 | case toketype_opval: |
21612876 | 142 | PerlIO_printf(Perl_debug_log, " %8.8s", |
1654d593 DM |
143 | ps->val.opval |
144 | ? PL_op_name[ps->val.opval->op_type] | |
670f3923 | 145 | : "(Nullop)" |
21612876 | 146 | ); |
d5c6462e | 147 | break; |
d5c6462e | 148 | case toketype_ival: |
147e3846 | 149 | PerlIO_printf(Perl_debug_log, " %8" IVdf, (IV)ps->val.ival); |
d5c6462e DM |
150 | break; |
151 | default: | |
147e3846 | 152 | PerlIO_printf(Perl_debug_log, " %8" UVxf, (UV)ps->val.ival); |
d5c6462e | 153 | } |
21612876 | 154 | } |
9388183f | 155 | PerlIO_printf(Perl_debug_log, "\n\n"); |
0de566d7 DM |
156 | } |
157 | ||
1654d593 DM |
158 | # define YY_STACK_PRINT(parser) \ |
159 | do { \ | |
160 | if (yydebug && DEBUG_v_TEST) \ | |
161 | yy_stack_print (aTHX_ parser); \ | |
0de566d7 DM |
162 | } while (0) |
163 | ||
09bef843 | 164 | |
0de566d7 DM |
165 | /*------------------------------------------------. |
166 | | Report that the YYRULE is going to be reduced. | | |
167 | `------------------------------------------------*/ | |
168 | ||
169 | static void | |
170 | yy_reduce_print (pTHX_ int yyrule) | |
171 | { | |
172 | int yyi; | |
df35152e | 173 | const unsigned int yylineno = yyrline[yyrule]; |
0de566d7 DM |
174 | YYFPRINTF (Perl_debug_log, "Reducing stack by rule %d (line %u), ", |
175 | yyrule - 1, yylineno); | |
176 | /* Print the symbols being reduced, and their result. */ | |
f39ff1f3 DM |
177 | #if PERL_BISON_VERSION >= 30000 /* 3.0+ */ |
178 | for (yyi = 0; yyi < yyr2[yyrule]; yyi++) | |
179 | YYFPRINTF (Perl_debug_log, "%s ", | |
180 | yytname [yystos[(PL_parser->ps)[yyi + 1 - yyr2[yyrule]].state]]); | |
181 | #else | |
0de566d7 DM |
182 | for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++) |
183 | YYFPRINTF (Perl_debug_log, "%s ", yytname [yyrhs[yyi]]); | |
f39ff1f3 | 184 | #endif |
0de566d7 DM |
185 | YYFPRINTF (Perl_debug_log, "-> %s\n", yytname [yyr1[yyrule]]); |
186 | } | |
187 | ||
188 | # define YY_REDUCE_PRINT(Rule) \ | |
189 | do { \ | |
190 | if (yydebug) \ | |
191 | yy_reduce_print (aTHX_ Rule); \ | |
192 | } while (0) | |
193 | ||
194 | #else /* !DEBUGGING */ | |
195 | # define YYDPRINTF(Args) | |
9388183f | 196 | # define YYDSYMPRINTF(Title, Token, Value) |
1654d593 | 197 | # define YY_STACK_PRINT(parser) |
0de566d7 DM |
198 | # define YY_REDUCE_PRINT(Rule) |
199 | #endif /* !DEBUGGING */ | |
200 | ||
718a7425 DM |
201 | /* called during cleanup (via SAVEDESTRUCTOR_X) to free any items on the |
202 | * parse stack, thus avoiding leaks if we die */ | |
203 | ||
204 | static void | |
22735491 | 205 | S_clear_yystack(pTHX_ const yy_parser *parser) |
718a7425 | 206 | { |
1654d593 | 207 | yy_stack_frame *ps = parser->ps; |
0934c9d9 | 208 | int i = 0; |
718a7425 | 209 | |
28ac2b49 | 210 | if (!parser->stack) |
718a7425 | 211 | return; |
1654d593 | 212 | |
718a7425 | 213 | YYDPRINTF ((Perl_debug_log, "clearing the parse stack\n")); |
670f3923 | 214 | |
8c63ea58 GG |
215 | for (i=0; i< parser->yylen; i++) { |
216 | SvREFCNT_dec(ps[-i].compcv); | |
217 | } | |
0aded6e1 | 218 | ps -= parser->yylen; |
670f3923 DM |
219 | |
220 | /* now free whole the stack, including the just-reduced ops */ | |
221 | ||
22735491 | 222 | while (ps > parser->stack) { |
503de470 | 223 | LEAVE_SCOPE(ps->savestack_ix); |
1654d593 DM |
224 | if (yy_type_tab[yystos[ps->state]] == toketype_opval |
225 | && ps->val.opval) | |
670f3923 | 226 | { |
a293d0fd | 227 | if (ps->compcv && (ps->compcv != PL_compcv)) { |
8c63ea58 GG |
228 | PL_compcv = ps->compcv; |
229 | PAD_SET_CUR_NOSAVE(CvPADLIST(PL_compcv), 1); | |
325e1816 | 230 | PL_comppad_name = PadlistNAMES(CvPADLIST(PL_compcv)); |
718a7425 DM |
231 | } |
232 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
571a568a | 233 | op_free(ps->val.opval); |
718a7425 | 234 | } |
8c63ea58 | 235 | SvREFCNT_dec(ps->compcv); |
1654d593 | 236 | ps--; |
718a7425 | 237 | } |
28ac2b49 Z |
238 | |
239 | Safefree(parser->stack); | |
718a7425 DM |
240 | } |
241 | ||
718a7425 | 242 | |
0de566d7 DM |
243 | /*----------. |
244 | | yyparse. | | |
245 | `----------*/ | |
246 | ||
79072805 | 247 | int |
28ac2b49 | 248 | Perl_yyparse (pTHX_ int gramtype) |
79072805 | 249 | { |
d3d9da4a | 250 | dVAR; |
eb578fdb KW |
251 | int yystate; |
252 | int yyn; | |
0de566d7 DM |
253 | int yyresult; |
254 | ||
0de566d7 | 255 | /* Lookahead token as an internal (translated) token number. */ |
714c8e96 | 256 | int yytoken = 0; |
0de566d7 | 257 | |
eb578fdb KW |
258 | yy_parser *parser; /* the parser object */ |
259 | yy_stack_frame *ps; /* current parser stack frame */ | |
a0d0e21e | 260 | |
1654d593 DM |
261 | #define YYPOPSTACK parser->ps = --ps |
262 | #define YYPUSHSTACK parser->ps = ++ps | |
0de566d7 | 263 | |
acdf0a21 | 264 | /* The variable used to return semantic value and location from the |
5912531f | 265 | action routines: ie $$. */ |
0de566d7 DM |
266 | YYSTYPE yyval; |
267 | ||
0de566d7 DM |
268 | YYDPRINTF ((Perl_debug_log, "Starting parse\n")); |
269 | ||
acdf0a21 | 270 | parser = PL_parser; |
1654d593 | 271 | |
28ac2b49 Z |
272 | ENTER; /* force parser state cleanup/restoration before we return */ |
273 | SAVEPPTR(parser->yylval.pval); | |
274 | SAVEINT(parser->yychar); | |
275 | SAVEINT(parser->yyerrstatus); | |
28ac2b49 Z |
276 | SAVEINT(parser->yylen); |
277 | SAVEVPTR(parser->stack); | |
df13534a | 278 | SAVEVPTR(parser->stack_max1); |
28ac2b49 Z |
279 | SAVEVPTR(parser->ps); |
280 | ||
281 | /* initialise state for this parse */ | |
282 | parser->yychar = gramtype; | |
0f8490d1 DM |
283 | yytoken = YYTRANSLATE(NATIVE_TO_UNI(parser->yychar)); |
284 | ||
28ac2b49 | 285 | parser->yyerrstatus = 0; |
28ac2b49 Z |
286 | parser->yylen = 0; |
287 | Newx(parser->stack, YYINITDEPTH, yy_stack_frame); | |
df13534a | 288 | parser->stack_max1 = parser->stack + YYINITDEPTH - 1; |
28ac2b49 Z |
289 | ps = parser->ps = parser->stack; |
290 | ps->state = 0; | |
e3abe207 | 291 | SAVEDESTRUCTOR_X(S_clear_yystack, parser); |
0de566d7 | 292 | |
fbe80aaa DM |
293 | while (1) { |
294 | /* main loop: shift some tokens, then reduce when possible */ | |
5019c3ae | 295 | |
ddbfb8f6 DM |
296 | while (1) { |
297 | /* shift a token, or quit when it's possible to reduce */ | |
5019c3ae | 298 | |
ddbfb8f6 | 299 | yystate = ps->state; |
5019c3ae | 300 | |
ddbfb8f6 | 301 | YYDPRINTF ((Perl_debug_log, "Entering state %d\n", yystate)); |
3c217e57 | 302 | |
ddbfb8f6 | 303 | parser->yylen = 0; |
3c217e57 | 304 | |
df13534a DM |
305 | /* Grow the stack? We always leave 1 spare slot, in case of a |
306 | * '' -> 'foo' reduction. | |
307 | * Note that stack_max1 points to the (top-1)th allocated stack | |
308 | * element to make this check faster */ | |
309 | ||
310 | if (ps >= parser->stack_max1) { | |
311 | Size_t pos = ps - parser->stack; | |
312 | Size_t newsize = 2 * (parser->stack_max1 + 2 - parser->stack); | |
313 | /* this will croak on insufficient memory */ | |
314 | Renew(parser->stack, newsize, yy_stack_frame); | |
315 | ps = parser->ps = parser->stack + pos; | |
316 | parser->stack_max1 = parser->stack + newsize - 1; | |
317 | ||
318 | YYDPRINTF((Perl_debug_log, | |
319 | "parser stack size increased to %lu frames\n", | |
320 | (unsigned long int)newsize)); | |
321 | } | |
322 | ||
0f8490d1 DM |
323 | /* Do appropriate processing given the current state. Read a |
324 | * lookahead token if we need one and don't already have one. | |
325 | * */ | |
3c217e57 | 326 | |
0f8490d1 DM |
327 | /* First try to decide what to do without reference to |
328 | * lookahead token. */ | |
3c217e57 | 329 | |
ddbfb8f6 DM |
330 | yyn = yypact[yystate]; |
331 | if (yyn == YYPACT_NINF) | |
332 | goto yydefault; | |
3c217e57 | 333 | |
0f8490d1 DM |
334 | /* Not known => get a lookahead token if don't already have |
335 | * one. YYCHAR is either YYEMPTY or YYEOF or a valid | |
336 | * lookahead symbol. */ | |
3c217e57 | 337 | |
ddbfb8f6 DM |
338 | if (parser->yychar == YYEMPTY) { |
339 | YYDPRINTF ((Perl_debug_log, "Reading a token:\n")); | |
340 | parser->yychar = yylex(); | |
0f8490d1 | 341 | assert(parser->yychar >= 0); |
6d17784b | 342 | if (parser->yychar == YYEOF) { |
0f8490d1 | 343 | YYDPRINTF ((Perl_debug_log, "Now at end of input.\n")); |
6d17784b | 344 | } |
0f8490d1 DM |
345 | /* perly.tab is shipped based on an ASCII system, so need |
346 | * to index it with characters translated to ASCII. | |
347 | * Although it's not designed for this purpose, we can use | |
348 | * NATIVE_TO_UNI here. It returns its argument on ASCII | |
349 | * platforms, and on EBCDIC translates native to ascii in | |
46235561 KW |
350 | * the 0-255 range, leaving every other possible input |
351 | * unchanged. This jibes with yylex() returning some bare | |
352 | * characters in that range, but all tokens it returns are | |
353 | * either 0, or above 255. There could be a problem if NULs | |
354 | * weren't 0, or were ever returned as raw chars by yylex() */ | |
0f8490d1 | 355 | yytoken = YYTRANSLATE(NATIVE_TO_UNI(parser->yychar)); |
ddbfb8f6 | 356 | } |
3c217e57 | 357 | |
0f8490d1 DM |
358 | /* make sure no-ones changed yychar since the last call to yylex */ |
359 | assert(yytoken == YYTRANSLATE(NATIVE_TO_UNI(parser->yychar))); | |
360 | YYDSYMPRINTF("lookahead token is", yytoken, &parser->yylval); | |
361 | ||
3c217e57 | 362 | |
ddbfb8f6 DM |
363 | /* If the proper action on seeing token YYTOKEN is to reduce or to |
364 | * detect an error, take that action. | |
365 | * Casting yyn to unsigned allows a >=0 test to be included as | |
366 | * part of the <=YYLAST test for speed */ | |
367 | yyn += yytoken; | |
368 | if ((unsigned int)yyn > YYLAST || yycheck[yyn] != yytoken) { | |
369 | yydefault: | |
370 | /* do the default action for the current state. */ | |
371 | yyn = yydefact[yystate]; | |
372 | if (yyn == 0) | |
373 | goto yyerrlab; | |
374 | break; /* time to reduce */ | |
375 | } | |
3c217e57 | 376 | |
ddbfb8f6 DM |
377 | yyn = yytable[yyn]; |
378 | if (yyn <= 0) { | |
379 | if (yyn == 0 || yyn == YYTABLE_NINF) | |
380 | goto yyerrlab; | |
381 | yyn = -yyn; | |
382 | break; /* time to reduce */ | |
383 | } | |
3c217e57 | 384 | |
ddbfb8f6 DM |
385 | if (yyn == YYFINAL) |
386 | YYACCEPT; | |
3c217e57 | 387 | |
ddbfb8f6 DM |
388 | /* Shift the lookahead token. */ |
389 | YYDPRINTF ((Perl_debug_log, "Shifting token %s, ", yytname[yytoken])); | |
3c217e57 | 390 | |
ddbfb8f6 DM |
391 | /* Discard the token being shifted unless it is eof. */ |
392 | if (parser->yychar != YYEOF) | |
393 | parser->yychar = YYEMPTY; | |
3c217e57 | 394 | |
ddbfb8f6 DM |
395 | YYPUSHSTACK; |
396 | ps->state = yyn; | |
397 | ps->val = parser->yylval; | |
398 | ps->compcv = (CV*)SvREFCNT_inc(PL_compcv); | |
399 | ps->savestack_ix = PL_savestack_ix; | |
9388183f | 400 | #ifdef DEBUGGING |
ddbfb8f6 | 401 | ps->name = (const char *)(yytname[yytoken]); |
9388183f | 402 | #endif |
0de566d7 | 403 | |
ddbfb8f6 DM |
404 | /* Count tokens shifted since error; after three, turn off error |
405 | status. */ | |
406 | if (parser->yyerrstatus) | |
407 | parser->yyerrstatus--; | |
0de566d7 | 408 | |
ddbfb8f6 | 409 | } |
0de566d7 | 410 | |
ddbfb8f6 | 411 | /* Do a reduction */ |
0de566d7 | 412 | |
ddbfb8f6 DM |
413 | /* yyn is the number of a rule to reduce with. */ |
414 | parser->yylen = yyr2[yyn]; | |
0de566d7 | 415 | |
ddbfb8f6 DM |
416 | /* If YYLEN is nonzero, implement the default value of the action: |
417 | "$$ = $1". | |
0de566d7 | 418 | |
ddbfb8f6 DM |
419 | Otherwise, the following line sets YYVAL to garbage. |
420 | This behavior is undocumented and Bison | |
421 | users should not rely upon it. Assigning to YYVAL | |
422 | unconditionally makes the parser a bit smaller, and it avoids a | |
423 | GCC warning that YYVAL may be used uninitialized. */ | |
424 | yyval = ps[1-parser->yylen].val; | |
0de566d7 | 425 | |
ddbfb8f6 DM |
426 | YY_STACK_PRINT(parser); |
427 | YY_REDUCE_PRINT (yyn); | |
718a7425 | 428 | |
ddbfb8f6 | 429 | switch (yyn) { |
0de566d7 | 430 | |
ddbfb8f6 | 431 | /* contains all the rule actions; auto-generated from perly.y */ |
f05e27e5 DM |
432 | #include "perly.act" |
433 | ||
ddbfb8f6 | 434 | } |
0de566d7 | 435 | |
ddbfb8f6 DM |
436 | { |
437 | int i; | |
438 | for (i=0; i< parser->yylen; i++) { | |
439 | SvREFCNT_dec(ps[-i].compcv); | |
440 | } | |
441 | } | |
670f3923 | 442 | |
ddbfb8f6 | 443 | parser->ps = ps -= (parser->yylen-1); |
0de566d7 | 444 | |
ddbfb8f6 DM |
445 | /* Now shift the result of the reduction. Determine what state |
446 | that goes to, based on the state we popped back to and the rule | |
447 | number reduced by. */ | |
05a03161 | 448 | |
ddbfb8f6 DM |
449 | ps->val = yyval; |
450 | ps->compcv = (CV*)SvREFCNT_inc(PL_compcv); | |
451 | ps->savestack_ix = PL_savestack_ix; | |
9388183f | 452 | #ifdef DEBUGGING |
ddbfb8f6 | 453 | ps->name = (const char *)(yytname [yyr1[yyn]]); |
9388183f | 454 | #endif |
0de566d7 | 455 | |
ddbfb8f6 | 456 | yyn = yyr1[yyn]; |
05a03161 | 457 | |
ddbfb8f6 DM |
458 | yystate = yypgoto[yyn - YYNTOKENS] + ps[-1].state; |
459 | if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == ps[-1].state) | |
460 | yystate = yytable[yystate]; | |
461 | else | |
462 | yystate = yydefgoto[yyn - YYNTOKENS]; | |
463 | ps->state = yystate; | |
0de566d7 | 464 | |
ddbfb8f6 | 465 | continue; |
0de566d7 | 466 | |
0de566d7 | 467 | |
ddbfb8f6 DM |
468 | /*------------------------------------. |
469 | | yyerrlab -- here on detecting error | | |
470 | `------------------------------------*/ | |
471 | yyerrlab: | |
472 | /* If not already recovering from an error, report this error. */ | |
473 | if (!parser->yyerrstatus) { | |
474 | yyerror ("syntax error"); | |
475 | } | |
0de566d7 | 476 | |
0de566d7 | 477 | |
ddbfb8f6 DM |
478 | if (parser->yyerrstatus == 3) { |
479 | /* If just tried and failed to reuse lookahead token after an | |
480 | error, discard it. */ | |
481 | ||
482 | /* Return failure if at end of input. */ | |
483 | if (parser->yychar == YYEOF) { | |
484 | /* Pop the error token. */ | |
485 | SvREFCNT_dec(ps->compcv); | |
486 | YYPOPSTACK; | |
487 | /* Pop the rest of the stack. */ | |
488 | while (ps > parser->stack) { | |
489 | YYDSYMPRINTF ("Error: popping", yystos[ps->state], &ps->val); | |
490 | LEAVE_SCOPE(ps->savestack_ix); | |
491 | if (yy_type_tab[yystos[ps->state]] == toketype_opval | |
492 | && ps->val.opval) | |
493 | { | |
494 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
495 | if (ps->compcv != PL_compcv) { | |
496 | PL_compcv = ps->compcv; | |
497 | PAD_SET_CUR_NOSAVE(CvPADLIST(PL_compcv), 1); | |
498 | } | |
499 | op_free(ps->val.opval); | |
500 | } | |
501 | SvREFCNT_dec(ps->compcv); | |
502 | YYPOPSTACK; | |
503 | } | |
504 | YYABORT; | |
505 | } | |
0de566d7 | 506 | |
ddbfb8f6 DM |
507 | YYDSYMPRINTF ("Error: discarding", yytoken, &parser->yylval); |
508 | parser->yychar = YYEMPTY; | |
0de566d7 | 509 | |
ddbfb8f6 | 510 | } |
0de566d7 | 511 | |
ddbfb8f6 DM |
512 | /* Else will try to reuse lookahead token after shifting the error |
513 | token. */ | |
514 | goto yyerrlab1; | |
515 | ||
516 | ||
517 | /*----------------------------------------------------. | |
518 | | yyerrlab1 -- error raised explicitly by an action. | | |
519 | `----------------------------------------------------*/ | |
520 | yyerrlab1: | |
521 | parser->yyerrstatus = 3; /* Each real token shifted decrements this. */ | |
522 | ||
523 | for (;;) { | |
524 | yyn = yypact[yystate]; | |
525 | if (yyn != YYPACT_NINF) { | |
526 | yyn += YYTERROR; | |
527 | if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) { | |
528 | yyn = yytable[yyn]; | |
529 | if (0 < yyn) | |
530 | break; | |
531 | } | |
532 | } | |
0de566d7 | 533 | |
ddbfb8f6 DM |
534 | /* Pop the current state because it cannot handle the error token. */ |
535 | if (ps == parser->stack) | |
536 | YYABORT; | |
537 | ||
538 | YYDSYMPRINTF ("Error: popping", yystos[ps->state], &ps->val); | |
539 | LEAVE_SCOPE(ps->savestack_ix); | |
540 | if (yy_type_tab[yystos[ps->state]] == toketype_opval && ps->val.opval) { | |
541 | YYDPRINTF ((Perl_debug_log, "(freeing op)\n")); | |
542 | if (ps->compcv != PL_compcv) { | |
543 | PL_compcv = ps->compcv; | |
544 | PAD_SET_CUR_NOSAVE(CvPADLIST(PL_compcv), 1); | |
545 | } | |
546 | op_free(ps->val.opval); | |
547 | } | |
548 | SvREFCNT_dec(ps->compcv); | |
549 | YYPOPSTACK; | |
550 | yystate = ps->state; | |
0de566d7 | 551 | |
ddbfb8f6 DM |
552 | YY_STACK_PRINT(parser); |
553 | } | |
0de566d7 | 554 | |
ddbfb8f6 DM |
555 | if (yyn == YYFINAL) |
556 | YYACCEPT; | |
0de566d7 | 557 | |
ddbfb8f6 | 558 | YYDPRINTF ((Perl_debug_log, "Shifting error token, ")); |
0de566d7 | 559 | |
ddbfb8f6 DM |
560 | YYPUSHSTACK; |
561 | ps->state = yyn; | |
562 | ps->val = parser->yylval; | |
563 | ps->compcv = (CV*)SvREFCNT_inc(PL_compcv); | |
564 | ps->savestack_ix = PL_savestack_ix; | |
9388183f | 565 | #ifdef DEBUGGING |
ddbfb8f6 | 566 | ps->name ="<err>"; |
9388183f | 567 | #endif |
0de566d7 | 568 | |
fbe80aaa | 569 | } /* main loop */ |
0de566d7 DM |
570 | |
571 | ||
572 | /*-------------------------------------. | |
573 | | yyacceptlab -- YYACCEPT comes here. | | |
574 | `-------------------------------------*/ | |
575 | yyacceptlab: | |
576 | yyresult = 0; | |
8c63ea58 GG |
577 | for (ps=parser->ps; ps > parser->stack; ps--) { |
578 | SvREFCNT_dec(ps->compcv); | |
579 | } | |
22735491 | 580 | parser->ps = parser->stack; /* disable cleanup */ |
0de566d7 DM |
581 | goto yyreturn; |
582 | ||
583 | /*-----------------------------------. | |
584 | | yyabortlab -- YYABORT comes here. | | |
585 | `-----------------------------------*/ | |
586 | yyabortlab: | |
587 | yyresult = 1; | |
588 | goto yyreturn; | |
589 | ||
0de566d7 | 590 | yyreturn: |
e3abe207 | 591 | LEAVE; /* force parser stack cleanup before we return */ |
0de566d7 | 592 | return yyresult; |
e1f15930 | 593 | } |
66610fdd RGS |
594 | |
595 | /* | |
14d04a33 | 596 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 597 | */ |