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a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW		 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 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
e50aee73 21/*
5dc0d613 22 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 23 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 24 */
11343788 25#define CHECKOP(type,o) \
28757baa 26 ((op_mask && op_mask[type]) \
5dc0d613 27 ? ( op_free((OP*)o), \
28757baa 28 croak("%s trapped by operation mask", op_desc[type]), \
29 Nullop ) \
11343788 30 : (*check[type])((OP*)o))
e50aee73 31
11343788 32static I32 list_assignment _((OP *o));
3bc5dc61 33static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 34static OP *modkids _((OP *o, I32 type));
35static OP *no_fh_allowed _((OP *o));
5dc0d613 36static bool scalar_mod_type _((OP *o, I32 type));
11343788
MB		 37static OP *scalarboolean _((OP *o));
38static OP *too_few_arguments _((OP *o, char* name));
39static OP *too_many_arguments _((OP *o, char* name));
40static void null _((OP* o));
bbce6d69 41static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
748a9306 42 CV* startcv, I32 cx_ix));
54b9620d 43static OP *newDEFSVOP _((void));
79072805 44
4633a7c4 45static char*
8ac85365 46gv_ename(GV *gv)
4633a7c4
LW		 47{
48 SV* tmpsv = sv_newmortal();
46fc3d4c 49 gv_efullname3(tmpsv, gv, Nullch);
4633a7c4
LW		 50 return SvPV(tmpsv,na);
51}
52
8990e307 53static OP *
8ac85365 54no_fh_allowed(OP *o)
79072805 55{
46fc3d4c 56 yyerror(form("Missing comma after first argument to %s function",
5196be3e 57 op_desc[o->op_type]));
11343788 58 return o;
79072805
LW		 59}
60
8990e307 61static OP *
8ac85365 62too_few_arguments(OP *o, char *name)
79072805 63{
46fc3d4c 64 yyerror(form("Not enough arguments for %s", name));
11343788 65 return o;
79072805
LW		 66}
67
8990e307 68static OP *
8ac85365 69too_many_arguments(OP *o, char *name)
79072805 70{
46fc3d4c 71 yyerror(form("Too many arguments for %s", name));
11343788 72 return o;
79072805
LW		 73}
74
3bc5dc61 75static void
8ac85365 76bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 77{
46fc3d4c 78 yyerror(form("Type of arg %d to %s must be %s (not %s)",
79 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 80}
81
a0d0e21e 82void
8ac85365 83assertref(OP *o)
a0d0e21e 84{
11343788 85 int type = o->op_type;
a0d0e21e 86 if (type != OP_AELEM && type != OP_HELEM) {
46fc3d4c 87 yyerror(form("Can't use subscript on %s", op_desc[type]));
8ebc5c01 88 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV)
748a9306 89 warn("(Did you mean $ or @ instead of %c?)\n",
8ebc5c01 90 type == OP_ENTERSUB ? '&' : '%');
a0d0e21e
LW		 91 }
92}
93
79072805
LW		 94/* "register" allocation */
95
96PADOFFSET
8ac85365 97pad_allocmy(char *name)
93a17b20 98{
11343788 99 dTHR;
a0d0e21e
LW		 100 PADOFFSET off;
101 SV *sv;
102
103 if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) {
46fc3d4c 104 if (!isPRINT(name[1])) {
105 name[3] = '\0';
106 name[2] = toCTRL(name[1]);
107 name[1] = '^';
108 }
a0d0e21e
LW		 109 croak("Can't use global %s in \"my\"",name);
110 }
93965878 111 if (dowarn && AvFILLp(comppad_name) >= 0) {
b1cb66bf 112 SV **svp = AvARRAY(comppad_name);
93965878 113 for (off = AvFILLp(comppad_name); off > comppad_name_floor; off--) {
b1cb66bf 114 if ((sv = svp[off])
115 && sv != &sv_undef
116 && SvIVX(sv) == 999999999 /* var is in open scope */
117 && strEQ(name, SvPVX(sv)))
118 {
119 warn("\"my\" variable %s masks earlier declaration in same scope", name);
120 break;
121 }
122 }
123 }
a0d0e21e
LW		 124 off = pad_alloc(OP_PADSV, SVs_PADMY);
125 sv = NEWSV(1102,0);
93a17b20
LW		 126 sv_upgrade(sv, SVt_PVNV);
127 sv_setpv(sv, name);
c750a3ec
MB		 128 if (in_my_stash) {
129 if (*name != '$')
130 croak("Can't declare class for non-scalar %s in \"my\"",name);
131 SvOBJECT_on(sv);
132 (void)SvUPGRADE(sv, SVt_PVMG);
133 SvSTASH(sv) = (HV*)SvREFCNT_inc(in_my_stash);
134 sv_objcount++;
135 }
8990e307 136 av_store(comppad_name, off, sv);
748a9306 137 SvNVX(sv) = (double)999999999;
8990e307
LW		 138 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
139 if (!min_intro_pending)
140 min_intro_pending = off;
141 max_intro_pending = off;
93a17b20 142 if (*name == '@')
463ee0b2 143 av_store(comppad, off, (SV*)newAV());
93a17b20 144 else if (*name == '%')
463ee0b2 145 av_store(comppad, off, (SV*)newHV());
ed6116ce 146 SvPADMY_on(curpad[off]);
93a17b20
LW		 147 return off;
148}
149
748a9306 150static PADOFFSET
e9a444f0 151#ifndef CAN_PROTOTYPE
748a9306 152pad_findlex(name, newoff, seq, startcv, cx_ix)
93a17b20 153char *name;
748a9306 154PADOFFSET newoff;
bbce6d69 155U32 seq;
748a9306
LW		 156CV* startcv;
157I32 cx_ix;
e9a444f0 158#else
bbce6d69 159pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix)
e9a444f0 160#endif
93a17b20 161{
11343788 162 dTHR;
748a9306 163 CV *cv;
93a17b20
LW		 164 I32 off;
165 SV *sv;
93a17b20 166 register I32 i;
c09156bb 167 register PERL_CONTEXT *cx;
a0d0e21e 168 int saweval;
93a17b20 169
748a9306 170 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 171 AV *curlist = CvPADLIST(cv);
172 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 173 AV *curname;
4fdae800 174
748a9306 175 if (!svp || *svp == &sv_undef)
4633a7c4 176 continue;
748a9306
LW		 177 curname = (AV*)*svp;
178 svp = AvARRAY(curname);
93965878 179 for (off = AvFILLp(curname); off > 0; off--) {
748a9306
LW		 180 if ((sv = svp[off]) &&
181 sv != &sv_undef &&
182 seq <= SvIVX(sv) &&
13826f2c 183 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 184 strEQ(SvPVX(sv), name))
185 {
5f05dabc 186 I32 depth;
187 AV *oldpad;
188 SV *oldsv;
189
190 depth = CvDEPTH(cv);
191 if (!depth) {
9607fc9c 192 if (newoff) {
193 if (SvFAKE(sv))
194 continue;
4fdae800 195 return 0; /* don't clone from inactive stack frame */
9607fc9c 196 }
5f05dabc 197 depth = 1;
198 }
199 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
200 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 201 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 202 SV *namesv = NEWSV(1103,0);
748a9306 203 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 204 sv_upgrade(namesv, SVt_PVNV);
205 sv_setpv(namesv, name);
206 av_store(comppad_name, newoff, namesv);
207 SvNVX(namesv) = (double)curcop->cop_seq;
208 SvIVX(namesv) = 999999999; /* A ref, intro immediately */
209 SvFAKE_on(namesv); /* A ref, not a real var */
774d564b 210 if (CvANON(compcv) || SvTYPE(compcv) == SVt_PVFM) {
28757baa 211 /* "It's closures all the way down." */
212 CvCLONE_on(compcv);
54310121 213 if (cv == startcv) {
214 if (CvANON(compcv))
215 oldsv = Nullsv; /* no need to keep ref */
216 }
217 else {
28757baa 218 CV *bcv;
219 for (bcv = startcv;
220 bcv && bcv != cv && !CvCLONE(bcv);
221 bcv = CvOUTSIDE(bcv)) {
222 if (CvANON(bcv))
223 CvCLONE_on(bcv);
224 else {
774d564b 225 if (dowarn && !CvUNIQUE(cv))
44a8e56a 226 warn(
227 "Variable \"%s\" may be unavailable",
28757baa 228 name);
229 break;
230 }
231 }
232 }
233 }
44a8e56a 234 else if (!CvUNIQUE(compcv)) {
9607fc9c 235 if (dowarn && !SvFAKE(sv) && !CvUNIQUE(cv))
44a8e56a 236 warn("Variable \"%s\" will not stay shared", name);
5f05dabc 237 }
748a9306 238 }
199100c8 239 av_store(comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 240 return newoff;
241 }
93a17b20
LW		 242 }
243 }
244
245 /* Nothing in current lexical context--try eval's context, if any.
246 * This is necessary to let the perldb get at lexically scoped variables.
247 * XXX This will also probably interact badly with eval tree caching.
248 */
249
a0d0e21e 250 saweval = 0;
748a9306 251 for (i = cx_ix; i >= 0; i--) {
93a17b20
LW		 252 cx = &cxstack[i];
253 switch (cx->cx_type) {
254 default:
748a9306
LW		 255 if (i == 0 && saweval) {
256 seq = cxstack[saweval].blk_oldcop->cop_seq;
257 return pad_findlex(name, newoff, seq, main_cv, 0);
258 }
93a17b20
LW		 259 break;
260 case CXt_EVAL:
44a8e56a 261 switch (cx->blk_eval.old_op_type) {
262 case OP_ENTEREVAL:
263 saweval = i;
264 break;
265 case OP_REQUIRE:
266 /* require must have its own scope */
267 return 0;
268 }
93a17b20
LW		 269 break;
270 case CXt_SUB:
271 if (!saweval)
272 return 0;
273 cv = cx->blk_sub.cv;
748a9306
LW		 274 if (debstash && CvSTASH(cv) == debstash) { /* ignore DB'* scope */
275 saweval = i; /* so we know where we were called from */
93a17b20 276 continue;
93a17b20 277 }
748a9306
LW		 278 seq = cxstack[saweval].blk_oldcop->cop_seq;
279 return pad_findlex(name, newoff, seq, cv, i-1);
93a17b20
LW		 280 }
281 }
282
748a9306
LW		 283 return 0;
284}
a0d0e21e 285
748a9306 286PADOFFSET
8ac85365 287pad_findmy(char *name)
748a9306 288{
11343788 289 dTHR;
748a9306 290 I32 off;
54310121 291 I32 pendoff = 0;
748a9306
LW		 292 SV *sv;
293 SV **svp = AvARRAY(comppad_name);
bbce6d69 294 U32 seq = cop_seqmax;
748a9306 295
11343788
MB		 296#ifdef USE_THREADS
297 /*
298 * Special case to get lexical (and hence per-thread) @_.
299 * XXX I need to find out how to tell at parse-time whether use
300 * of @_ should refer to a lexical (from a sub) or defgv (global
301 * scope and maybe weird sub-ish things like formats). See
302 * startsub in perly.y. It's possible that @_ could be lexical
303 * (at least from subs) even in non-threaded perl.
304 */
305 if (strEQ(name, "@_"))
306 return 0; /* success. (NOT_IN_PAD indicates failure) */
307#endif /* USE_THREADS */
308
748a9306 309 /* The one we're looking for is probably just before comppad_name_fill. */
93965878 310 for (off = AvFILLp(comppad_name); off > 0; off--) {
a0d0e21e
LW		 311 if ((sv = svp[off]) &&
312 sv != &sv_undef &&
54310121 313 (!SvIVX(sv) ||
314 (seq <= SvIVX(sv) &&
315 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 316 strEQ(SvPVX(sv), name))
317 {
54310121 318 if (SvIVX(sv))
319 return (PADOFFSET)off;
320 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 321 }
322 }
748a9306
LW		 323
324 /* See if it's in a nested scope */
325 off = pad_findlex(name, 0, seq, CvOUTSIDE(compcv), cxstack_ix);
54310121 326 if (off) {
327 /* If there is a pending local definition, this new alias must die */
328 if (pendoff)
329 SvIVX(AvARRAY(comppad_name)[off]) = seq;
11343788 330 return off; /* pad_findlex returns 0 for failure...*/
54310121 331 }
11343788 332 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 333}
334
335void
8ac85365 336pad_leavemy(I32 fill)
93a17b20
LW		 337{
338 I32 off;
8990e307 339 SV **svp = AvARRAY(comppad_name);
93a17b20 340 SV *sv;
8990e307
LW		 341 if (min_intro_pending && fill < min_intro_pending) {
342 for (off = max_intro_pending; off >= min_intro_pending; off--) {
a0d0e21e 343 if ((sv = svp[off]) && sv != &sv_undef)
8990e307
LW		 344 warn("%s never introduced", SvPVX(sv));
345 }
346 }
347 /* "Deintroduce" my variables that are leaving with this scope. */
93965878 348 for (off = AvFILLp(comppad_name); off > fill; off--) {
748a9306 349 if ((sv = svp[off]) && sv != &sv_undef && SvIVX(sv) == 999999999)
463ee0b2 350 SvIVX(sv) = cop_seqmax;
93a17b20
LW		 351 }
352}
353
354PADOFFSET
8ac85365 355pad_alloc(I32 optype, U32 tmptype)
79072805 356{
11343788 357 dTHR;
79072805
LW		 358 SV *sv;
359 I32 retval;
360
361 if (AvARRAY(comppad) != curpad)
463ee0b2 362 croak("panic: pad_alloc");
a0d0e21e
LW		 363 if (pad_reset_pending)
364 pad_reset();
ed6116ce 365 if (tmptype & SVs_PADMY) {
79072805 366 do {
93965878 367 sv = *av_fetch(comppad, AvFILLp(comppad) + 1, TRUE);
ed6116ce 368 } while (SvPADBUSY(sv)); /* need a fresh one */
93965878 369 retval = AvFILLp(comppad);
79072805
LW		 370 }
371 else {
bbce6d69 372 SV **names = AvARRAY(comppad_name);
93965878 373 SSize_t names_fill = AvFILLp(comppad_name);
bbce6d69 374 for (;;) {
375 /*
376 * "foreach" index vars temporarily become aliases to non-"my"
377 * values. Thus we must skip, not just pad values that are
378 * marked as current pad values, but also those with names.
379 */
380 if (++padix <= names_fill &&
381 (sv = names[padix]) && sv != &sv_undef)
382 continue;
383 sv = *av_fetch(comppad, padix, TRUE);
384 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
385 break;
386 }
79072805
LW		 387 retval = padix;
388 }
8990e307 389 SvFLAGS(sv) |= tmptype;
79072805 390 curpad = AvARRAY(comppad);
11343788 391#ifdef USE_THREADS
5dc0d613
MB		 392 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
393 (unsigned long) thr, (unsigned long) curpad,
394 (long) retval, op_name[optype]));
11343788 395#else
d9bb4600
GS		 396 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
397 (unsigned long) curpad,
5dc0d613 398 (long) retval, op_name[optype]));
11343788 399#endif /* USE_THREADS */
79072805
LW		 400 return (PADOFFSET)retval;
401}
402
403SV *
a0d0e21e 404#ifndef CAN_PROTOTYPE
79072805
LW		 405pad_sv(po)
406PADOFFSET po;
8990e307
LW		 407#else
408pad_sv(PADOFFSET po)
a0d0e21e 409#endif /* CAN_PROTOTYPE */
79072805 410{
11343788
MB		 411 dTHR;
412#ifdef USE_THREADS
5dc0d613
MB		 413 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
414 (unsigned long) thr, (unsigned long) curpad, po));
11343788 415#else
79072805 416 if (!po)
463ee0b2 417 croak("panic: pad_sv po");
d9bb4600
GS		 418 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
419 (unsigned long) curpad, po));
11343788 420#endif /* USE_THREADS */
79072805
LW		 421 return curpad[po]; /* eventually we'll turn this into a macro */
422}
423
424void
a0d0e21e 425#ifndef CAN_PROTOTYPE
79072805
LW		 426pad_free(po)
427PADOFFSET po;
8990e307
LW		 428#else
429pad_free(PADOFFSET po)
a0d0e21e 430#endif /* CAN_PROTOTYPE */
79072805 431{
11343788 432 dTHR;
a0d0e21e
LW		 433 if (!curpad)
434 return;
79072805 435 if (AvARRAY(comppad) != curpad)
463ee0b2 436 croak("panic: pad_free curpad");
79072805 437 if (!po)
463ee0b2 438 croak("panic: pad_free po");
11343788 439#ifdef USE_THREADS
5dc0d613
MB		 440 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
441 (unsigned long) thr, (unsigned long) curpad, po));
11343788 442#else
d9bb4600
GS		 443 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
444 (unsigned long) curpad, po));
11343788 445#endif /* USE_THREADS */
a0d0e21e 446 if (curpad[po] && curpad[po] != &sv_undef)
ed6116ce 447 SvPADTMP_off(curpad[po]);
a0d0e21e 448 if ((I32)po < padix)
79072805
LW		 449 padix = po - 1;
450}
451
452void
a0d0e21e 453#ifndef CAN_PROTOTYPE
79072805
LW		 454pad_swipe(po)
455PADOFFSET po;
8990e307
LW		 456#else
457pad_swipe(PADOFFSET po)
a0d0e21e 458#endif /* CAN_PROTOTYPE */
79072805 459{
11343788 460 dTHR;
79072805 461 if (AvARRAY(comppad) != curpad)
463ee0b2 462 croak("panic: pad_swipe curpad");
79072805 463 if (!po)
463ee0b2 464 croak("panic: pad_swipe po");
11343788 465#ifdef USE_THREADS
5dc0d613
MB		 466 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
467 (unsigned long) thr, (unsigned long) curpad, po));
11343788 468#else
d9bb4600
GS		 469 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
470 (unsigned long) curpad, po));
11343788 471#endif /* USE_THREADS */
ed6116ce 472 SvPADTMP_off(curpad[po]);
a0d0e21e
LW		 473 curpad[po] = NEWSV(1107,0);
474 SvPADTMP_on(curpad[po]);
475 if ((I32)po < padix)
79072805
LW		 476 padix = po - 1;
477}
478
d9bb4600
GS		 479/* XXX pad_reset() is currently disabled because it results in serious bugs.
480 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
481 * on the stack by OPs that use them, there are several ways to get an alias
482 * to a shared TARG. Such an alias will change randomly and unpredictably.
483 * We avoid doing this until we can think of a Better Way.
484 * GSAR 97-10-29 */
79072805 485void
8ac85365 486pad_reset(void)
79072805 487{
d9bb4600 488#ifdef USE_BROKEN_PAD_RESET
11343788 489 dTHR;
79072805
LW		 490 register I32 po;
491
492 if (AvARRAY(comppad) != curpad)
463ee0b2 493 croak("panic: pad_reset curpad");
11343788 494#ifdef USE_THREADS
5dc0d613
MB		 495 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
496 (unsigned long) thr, (unsigned long) curpad));
11343788 497#else
d9bb4600
GS		 498 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
499 (unsigned long) curpad));
11343788 500#endif /* USE_THREADS */
748a9306
LW		 501 if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */
502 for (po = AvMAX(comppad); po > padix_floor; po--) {
ff0cee69 503 if (curpad[po] && !SvIMMORTAL(curpad[po]))
748a9306
LW		 504 SvPADTMP_off(curpad[po]);
505 }
506 padix = padix_floor;
79072805 507 }
d9bb4600 508#endif
a0d0e21e 509 pad_reset_pending = FALSE;
79072805
LW		 510}
511
a863c7d1 512#ifdef USE_THREADS
54b9620d 513/* find_threadsv is not reentrant */
a863c7d1 514PADOFFSET
54b9620d 515find_threadsv(char *name)
a863c7d1
MB		 516{
517 dTHR;
518 char *p;
519 PADOFFSET key;
554b3eca 520 SV **svp;
54b9620d
MB		 521 /* We currently only handle names of a single character */
522 p = strchr(threadsv_names, *name);
a863c7d1
MB		 523 if (!p)
524 return NOT_IN_PAD;
54b9620d
MB		 525 key = p - threadsv_names;
526 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 527 if (!svp) {
528 SV *sv = NEWSV(0, 0);
54b9620d 529 av_store(thr->threadsv, key, sv);
940cb80d 530 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 531 /*
532 * Some magic variables used to be automagically initialised
533 * in gv_fetchpv. Those which are now per-thread magicals get
534 * initialised here instead.
535 */
536 switch (*name) {
54b9620d
MB		 537 case '_':
538 break;
554b3eca
MB		 539 case ';':
540 sv_setpv(sv, "\034");
54b9620d 541 sv_magic(sv, 0, 0, name, 1);
554b3eca 542 break;
c277df42
IZ		 543 case '&':
544 case '`':
545 case '\'':
546 sawampersand = TRUE;
547 SvREADONLY_on(sv);
d8b5173a 548 /* FALL THROUGH */
54b9620d
MB		 549 default:
550 sv_magic(sv, 0, 0, name, 1);
554b3eca 551 }
a863c7d1 552 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
54b9620d 553 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 554 sv, (*name < 32) ? "^" : "",
555 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 556 }
557 return key;
558}
559#endif /* USE_THREADS */
560
79072805
LW		 561/* Destructor */
562
563void
8ac85365 564op_free(OP *o)
79072805 565{
85e6fe83 566 register OP *kid, *nextkid;
79072805 567
5dc0d613 568 if (!o || o->op_seq == (U16)-1)
79072805
LW		 569 return;
570
11343788
MB		 571 if (o->op_flags & OPf_KIDS) {
572 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 573 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 574 op_free(kid);
85e6fe83 575 }
79072805
LW		 576 }
577
11343788 578 switch (o->op_type) {
8990e307 579 case OP_NULL:
11343788 580 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 581 break;
a0d0e21e 582 case OP_ENTEREVAL:
11343788 583 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 584 break;
554b3eca 585#ifdef USE_THREADS
2faa37cc 586 case OP_THREADSV:
54b9620d 587 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 588 break;
589#endif /* USE_THREADS */
a6006777 590 default:
5196be3e 591 if (!(o->op_flags & OPf_REF) || (check[o->op_type] != ck_ftst))
a6006777 592 break;
593 /* FALL THROUGH */
463ee0b2 594 case OP_GVSV:
79072805 595 case OP_GV:
a6006777 596 case OP_AELEMFAST:
11343788 597 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 598 break;
599 case OP_NEXTSTATE:
600 case OP_DBSTATE:
5196be3e 601 Safefree(cCOPo->cop_label);
11343788 602 SvREFCNT_dec(cCOPo->cop_filegv);
79072805
LW		 603 break;
604 case OP_CONST:
11343788 605 SvREFCNT_dec(cSVOPo->op_sv);
79072805 606 break;
748a9306
LW		 607 case OP_GOTO:
608 case OP_NEXT:
609 case OP_LAST:
610 case OP_REDO:
11343788 611 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 612 break;
613 /* FALL THROUGH */
a0d0e21e 614 case OP_TRANS:
11343788 615 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 616 break;
617 case OP_SUBST:
11343788 618 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 619 /* FALL THROUGH */
748a9306 620 case OP_PUSHRE:
a0d0e21e 621 case OP_MATCH:
c277df42 622 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 623 break;
79072805
LW		 624 }
625
11343788
MB		 626 if (o->op_targ > 0)
627 pad_free(o->op_targ);
8990e307 628
11343788 629 Safefree(o);
79072805
LW		 630}
631
8990e307 632static void
8ac85365 633null(OP *o)
8990e307 634{
54b9620d 635 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 636 pad_free(o->op_targ);
637 o->op_targ = o->op_type;
638 o->op_type = OP_NULL;
639 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 640}
641
79072805
LW		 642/* Contextualizers */
643
463ee0b2 644#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 645
646OP *
8ac85365 647linklist(OP *o)
79072805
LW		 648{
649 register OP *kid;
650
11343788
MB		 651 if (o->op_next)
652 return o->op_next;
79072805
LW		 653
654 /* establish postfix order */
11343788
MB		 655 if (cUNOPo->op_first) {
656 o->op_next = LINKLIST(cUNOPo->op_first);
657 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 658 if (kid->op_sibling)
659 kid->op_next = LINKLIST(kid->op_sibling);
660 else
11343788 661 kid->op_next = o;
79072805
LW		 662 }
663 }
664 else
11343788 665 o->op_next = o;
79072805 666
11343788 667 return o->op_next;
79072805
LW		 668}
669
670OP *
8ac85365 671scalarkids(OP *o)
79072805
LW		 672{
673 OP *kid;
11343788
MB		 674 if (o && o->op_flags & OPf_KIDS) {
675 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 676 scalar(kid);
677 }
11343788 678 return o;
79072805
LW		 679}
680
a0d0e21e 681static OP *
8ac85365 682scalarboolean(OP *o)
8990e307
LW		 683{
684 if (dowarn &&
11343788 685 o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 686 dTHR;
a0d0e21e
LW		 687 line_t oldline = curcop->cop_line;
688
689 if (copline != NOLINE)
690 curcop->cop_line = copline;
691 warn("Found = in conditional, should be ==");
692 curcop->cop_line = oldline;
693 }
11343788 694 return scalar(o);
8990e307
LW		 695}
696
697OP *
8ac85365 698scalar(OP *o)
79072805
LW		 699{
700 OP *kid;
701
a0d0e21e 702 /* assumes no premature commitment */
5dc0d613
MB		 703 if (!o || (o->op_flags & OPf_WANT) || error_count
704 || o->op_type == OP_RETURN)
11343788 705 return o;
79072805 706
5dc0d613 707 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 708
11343788 709 switch (o->op_type) {
79072805 710 case OP_REPEAT:
11343788
MB		 711 if (o->op_private & OPpREPEAT_DOLIST)
712 null(((LISTOP*)cBINOPo->op_first)->op_first);
713 scalar(cBINOPo->op_first);
8990e307 714 break;
79072805
LW		 715 case OP_OR:
716 case OP_AND:
717 case OP_COND_EXPR:
11343788 718 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 719 scalar(kid);
79072805 720 break;
a0d0e21e 721 case OP_SPLIT:
11343788 722 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 723 if (!kPMOP->op_pmreplroot)
724 deprecate("implicit split to @_");
725 }
726 /* FALL THROUGH */
79072805
LW		 727 case OP_MATCH:
728 case OP_SUBST:
729 case OP_NULL:
8990e307 730 default:
11343788
MB		 731 if (o->op_flags & OPf_KIDS) {
732 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 733 scalar(kid);
734 }
79072805
LW		 735 break;
736 case OP_LEAVE:
737 case OP_LEAVETRY:
5dc0d613 738 kid = cLISTOPo->op_first;
54310121 739 scalar(kid);
740 while (kid = kid->op_sibling) {
741 if (kid->op_sibling)
742 scalarvoid(kid);
743 else
744 scalar(kid);
745 }
0f15f207 746 WITH_THR(curcop = &compiling);
54310121 747 break;
748a9306 748 case OP_SCOPE:
79072805 749 case OP_LINESEQ:
8990e307 750 case OP_LIST:
11343788 751 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 752 if (kid->op_sibling)
753 scalarvoid(kid);
754 else
755 scalar(kid);
756 }
0f15f207 757 WITH_THR(curcop = &compiling);
79072805
LW		 758 break;
759 }
11343788 760 return o;
79072805
LW		 761}
762
763OP *
8ac85365 764scalarvoid(OP *o)
79072805
LW		 765{
766 OP *kid;
8990e307
LW		 767 char* useless = 0;
768 SV* sv;
79072805 769
54310121 770 /* assumes no premature commitment */
5dc0d613
MB		 771 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count
772 || o->op_type == OP_RETURN)
11343788 773 return o;
79072805 774
5dc0d613 775 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 776
11343788 777 switch (o->op_type) {
79072805 778 default:
11343788 779 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 780 break;
36477c24 781 /* FALL THROUGH */
782 case OP_REPEAT:
11343788 783 if (o->op_flags & OPf_STACKED)
8990e307
LW		 784 break;
785 /* FALL THROUGH */
786 case OP_GVSV:
787 case OP_WANTARRAY:
788 case OP_GV:
789 case OP_PADSV:
790 case OP_PADAV:
791 case OP_PADHV:
792 case OP_PADANY:
793 case OP_AV2ARYLEN:
8990e307 794 case OP_REF:
a0d0e21e
LW		 795 case OP_REFGEN:
796 case OP_SREFGEN:
8990e307
LW		 797 case OP_DEFINED:
798 case OP_HEX:
799 case OP_OCT:
800 case OP_LENGTH:
801 case OP_SUBSTR:
802 case OP_VEC:
803 case OP_INDEX:
804 case OP_RINDEX:
805 case OP_SPRINTF:
806 case OP_AELEM:
807 case OP_AELEMFAST:
808 case OP_ASLICE:
8990e307
LW		 809 case OP_HELEM:
810 case OP_HSLICE:
811 case OP_UNPACK:
812 case OP_PACK:
8990e307
LW		 813 case OP_JOIN:
814 case OP_LSLICE:
815 case OP_ANONLIST:
816 case OP_ANONHASH:
817 case OP_SORT:
818 case OP_REVERSE:
819 case OP_RANGE:
820 case OP_FLIP:
821 case OP_FLOP:
822 case OP_CALLER:
823 case OP_FILENO:
824 case OP_EOF:
825 case OP_TELL:
826 case OP_GETSOCKNAME:
827 case OP_GETPEERNAME:
828 case OP_READLINK:
829 case OP_TELLDIR:
830 case OP_GETPPID:
831 case OP_GETPGRP:
832 case OP_GETPRIORITY:
833 case OP_TIME:
834 case OP_TMS:
835 case OP_LOCALTIME:
836 case OP_GMTIME:
837 case OP_GHBYNAME:
838 case OP_GHBYADDR:
839 case OP_GHOSTENT:
840 case OP_GNBYNAME:
841 case OP_GNBYADDR:
842 case OP_GNETENT:
843 case OP_GPBYNAME:
844 case OP_GPBYNUMBER:
845 case OP_GPROTOENT:
846 case OP_GSBYNAME:
847 case OP_GSBYPORT:
848 case OP_GSERVENT:
849 case OP_GPWNAM:
850 case OP_GPWUID:
851 case OP_GGRNAM:
852 case OP_GGRGID:
853 case OP_GETLOGIN:
11343788
MB		 854 if (!(o->op_private & OPpLVAL_INTRO))
855 useless = op_desc[o->op_type];
8990e307
LW		 856 break;
857
858 case OP_RV2GV:
859 case OP_RV2SV:
860 case OP_RV2AV:
861 case OP_RV2HV:
11343788
MB		 862 if (!(o->op_private & OPpLVAL_INTRO) &&
863 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 864 useless = "a variable";
865 break;
79072805 866
93a17b20 867 case OP_NEXTSTATE:
8990e307 868 case OP_DBSTATE:
0f15f207 869 WITH_THR(curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 870 break;
871
79072805 872 case OP_CONST:
11343788 873 sv = cSVOPo->op_sv;
8990e307
LW		 874 if (dowarn) {
875 useless = "a constant";
876 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
877 useless = 0;
878 else if (SvPOK(sv)) {
879 if (strnEQ(SvPVX(sv), "di", 2) ||
a0d0e21e 880 strnEQ(SvPVX(sv), "ds", 2) ||
8990e307
LW		 881 strnEQ(SvPVX(sv), "ig", 2))
882 useless = 0;
883 }
884 }
11343788 885 null(o); /* don't execute a constant */
8990e307 886 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 887 break;
888
889 case OP_POSTINC:
11343788
MB		 890 o->op_type = OP_PREINC; /* pre-increment is faster */
891 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 892 break;
893
894 case OP_POSTDEC:
11343788
MB		 895 o->op_type = OP_PREDEC; /* pre-decrement is faster */
896 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 897 break;
898
79072805
LW		 899 case OP_OR:
900 case OP_AND:
901 case OP_COND_EXPR:
11343788 902 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 903 scalarvoid(kid);
904 break;
5aabfad6 905
a0d0e21e 906 case OP_NULL:
11343788 907 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
0f15f207 908 WITH_THR(curcop = ((COP*)o)); /* for warning below */
11343788 909 if (o->op_flags & OPf_STACKED)
a0d0e21e 910 break;
5aabfad6 911 /* FALL THROUGH */
79072805
LW		 912 case OP_ENTERTRY:
913 case OP_ENTER:
914 case OP_SCALAR:
11343788 915 if (!(o->op_flags & OPf_KIDS))
79072805 916 break;
54310121 917 /* FALL THROUGH */
463ee0b2 918 case OP_SCOPE:
79072805
LW		 919 case OP_LEAVE:
920 case OP_LEAVETRY:
a0d0e21e 921 case OP_LEAVELOOP:
79072805 922 case OP_LINESEQ:
79072805 923 case OP_LIST:
11343788 924 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 925 scalarvoid(kid);
926 break;
c90c0ff4 927 case OP_ENTEREVAL:
5196be3e 928 scalarkids(o);
c90c0ff4 929 break;
5aabfad6 930 case OP_REQUIRE:
c90c0ff4 931 /* all requires must return a boolean value */
5196be3e
MB		 932 o->op_flags &= ~OPf_WANT;
933 return scalar(o);
a0d0e21e 934 case OP_SPLIT:
11343788 935 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 936 if (!kPMOP->op_pmreplroot)
937 deprecate("implicit split to @_");
938 }
939 break;
79072805 940 }
8990e307
LW		 941 if (useless && dowarn)
942 warn("Useless use of %s in void context", useless);
11343788 943 return o;
79072805
LW		 944}
945
946OP *
8ac85365 947listkids(OP *o)
79072805
LW		 948{
949 OP *kid;
11343788
MB		 950 if (o && o->op_flags & OPf_KIDS) {
951 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 952 list(kid);
953 }
11343788 954 return o;
79072805
LW		 955}
956
957OP *
8ac85365 958list(OP *o)
79072805
LW		 959{
960 OP *kid;
961
a0d0e21e 962 /* assumes no premature commitment */
5dc0d613
MB		 963 if (!o || (o->op_flags & OPf_WANT) || error_count
964 || o->op_type == OP_RETURN)
11343788 965 return o;
79072805 966
5dc0d613 967 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 968
11343788 969 switch (o->op_type) {
79072805
LW		 970 case OP_FLOP:
971 case OP_REPEAT:
11343788 972 list(cBINOPo->op_first);
79072805
LW		 973 break;
974 case OP_OR:
975 case OP_AND:
976 case OP_COND_EXPR:
11343788 977 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 978 list(kid);
979 break;
980 default:
981 case OP_MATCH:
982 case OP_SUBST:
983 case OP_NULL:
11343788 984 if (!(o->op_flags & OPf_KIDS))
79072805 985 break;
11343788
MB		 986 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
987 list(cBINOPo->op_first);
988 return gen_constant_list(o);
79072805
LW		 989 }
990 case OP_LIST:
11343788 991 listkids(o);
79072805
LW		 992 break;
993 case OP_LEAVE:
994 case OP_LEAVETRY:
5dc0d613 995 kid = cLISTOPo->op_first;
54310121 996 list(kid);
997 while (kid = kid->op_sibling) {
998 if (kid->op_sibling)
999 scalarvoid(kid);
1000 else
1001 list(kid);
1002 }
0f15f207 1003 WITH_THR(curcop = &compiling);
54310121 1004 break;
748a9306 1005 case OP_SCOPE:
79072805 1006 case OP_LINESEQ:
11343788 1007 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1008 if (kid->op_sibling)
1009 scalarvoid(kid);
1010 else
1011 list(kid);
1012 }
0f15f207 1013 WITH_THR(curcop = &compiling);
79072805 1014 break;
c90c0ff4 1015 case OP_REQUIRE:
1016 /* all requires must return a boolean value */
5196be3e
MB		 1017 o->op_flags &= ~OPf_WANT;
1018 return scalar(o);
79072805 1019 }
11343788 1020 return o;
79072805
LW		 1021}
1022
1023OP *
8ac85365 1024scalarseq(OP *o)
79072805
LW		 1025{
1026 OP *kid;
1027
11343788
MB		 1028 if (o) {
1029 if (o->op_type == OP_LINESEQ ||
1030 o->op_type == OP_SCOPE ||
1031 o->op_type == OP_LEAVE ||
1032 o->op_type == OP_LEAVETRY)
463ee0b2 1033 {
0f15f207 1034 dTHR;
11343788 1035 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1036 if (kid->op_sibling) {
463ee0b2 1037 scalarvoid(kid);
ed6116ce 1038 }
463ee0b2
LW		 1039 }
1040 curcop = &compiling;
79072805 1041 }
11343788 1042 o->op_flags &= ~OPf_PARENS;
85e6fe83 1043 if (hints & HINT_BLOCK_SCOPE)
11343788 1044 o->op_flags |= OPf_PARENS;
79072805 1045 }
8990e307 1046 else
11343788
MB		 1047 o = newOP(OP_STUB, 0);
1048 return o;
79072805
LW		 1049}
1050
a0d0e21e 1051static OP *
8ac85365 1052modkids(OP *o, I32 type)
79072805
LW		 1053{
1054 OP *kid;
11343788
MB		 1055 if (o && o->op_flags & OPf_KIDS) {
1056 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1057 mod(kid, type);
79072805 1058 }
11343788 1059 return o;
79072805
LW		 1060}
1061
463ee0b2 1062static I32 modcount;
79072805
LW		 1063
1064OP *
8ac85365 1065mod(OP *o, I32 type)
79072805 1066{
11343788 1067 dTHR;
79072805
LW		 1068 OP *kid;
1069 SV *sv;
1070
11343788
MB		 1071 if (!o || error_count)
1072 return o;
79072805 1073
11343788 1074 switch (o->op_type) {
68dc0745 1075 case OP_UNDEF:
3e3baf6d 1076 modcount++;
5dc0d613 1077 return o;
a0d0e21e 1078 case OP_CONST:
11343788 1079 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1080 goto nomod;
1081 if (eval_start && eval_start->op_type == OP_CONST) {
1082 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1083 eval_start = 0;
1084 }
1085 else if (!type) {
1086 SAVEI32(compiling.cop_arybase);
748a9306 1087 compiling.cop_arybase = 0;
a0d0e21e
LW		 1088 }
1089 else if (type == OP_REFGEN)
1090 goto nomod;
1091 else
1092 croak("That use of $[ is unsupported");
1093 break;
5f05dabc 1094 case OP_STUB:
5196be3e 1095 if (o->op_flags & OPf_PARENS)
5f05dabc 1096 break;
1097 goto nomod;
a0d0e21e
LW		 1098 case OP_ENTERSUB:
1099 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1100 !(o->op_flags & OPf_STACKED)) {
1101 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1102 o->op_ppaddr = ppaddr[OP_RV2CV];
1103 assert(cUNOPo->op_first->op_type == OP_NULL);
1104 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1105 break;
1106 }
1107 /* FALL THROUGH */
1108 default:
a0d0e21e
LW		 1109 nomod:
1110 /* grep, foreach, subcalls, refgen */
1111 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1112 break;
46fc3d4c 1113 yyerror(form("Can't modify %s in %s",
5dc0d613 1114 op_desc[o->op_type],
46fc3d4c 1115 type ? op_desc[type] : "local"));
11343788 1116 return o;
79072805 1117
a0d0e21e
LW		 1118 case OP_PREINC:
1119 case OP_PREDEC:
1120 case OP_POW:
1121 case OP_MULTIPLY:
1122 case OP_DIVIDE:
1123 case OP_MODULO:
1124 case OP_REPEAT:
1125 case OP_ADD:
1126 case OP_SUBTRACT:
1127 case OP_CONCAT:
1128 case OP_LEFT_SHIFT:
1129 case OP_RIGHT_SHIFT:
1130 case OP_BIT_AND:
1131 case OP_BIT_XOR:
1132 case OP_BIT_OR:
1133 case OP_I_MULTIPLY:
1134 case OP_I_DIVIDE:
1135 case OP_I_MODULO:
1136 case OP_I_ADD:
1137 case OP_I_SUBTRACT:
11343788 1138 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1139 goto nomod;
1140 modcount++;
1141 break;
1142
79072805 1143 case OP_COND_EXPR:
11343788 1144 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1145 mod(kid, type);
79072805
LW		 1146 break;
1147
1148 case OP_RV2AV:
1149 case OP_RV2HV:
93af7a87 1150 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1151 croak("Can't localize through a reference");
11343788 1152 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1153 modcount = 10000;
11343788 1154 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1155 }
1156 /* FALL THROUGH */
79072805 1157 case OP_RV2GV:
5dc0d613 1158 if (scalar_mod_type(o, type))
3fe9a6f1 1159 goto nomod;
11343788 1160 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1161 /* FALL THROUGH */
1162 case OP_AASSIGN:
1163 case OP_ASLICE:
1164 case OP_HSLICE:
93a17b20
LW		 1165 case OP_NEXTSTATE:
1166 case OP_DBSTATE:
a0d0e21e
LW		 1167 case OP_REFGEN:
1168 case OP_CHOMP:
463ee0b2 1169 modcount = 10000;
79072805 1170 break;
463ee0b2 1171 case OP_RV2SV:
11343788 1172 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1173 croak("Can't localize through a reference");
aeea060c 1174 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1175 /* FALL THROUGH */
79072805 1176 case OP_GV:
463ee0b2 1177 case OP_AV2ARYLEN:
85aff577 1178 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1179 case OP_SASSIGN:
8990e307
LW		 1180 case OP_AELEMFAST:
1181 modcount++;
1182 break;
1183
748a9306
LW		 1184 case OP_PADAV:
1185 case OP_PADHV:
1186 modcount = 10000;
5196be3e
MB		 1187 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1188 return o; /* Treat \(@foo) like ordinary list. */
1189 if (scalar_mod_type(o, type))
3fe9a6f1 1190 goto nomod;
748a9306
LW		 1191 /* FALL THROUGH */
1192 case OP_PADSV:
1193 modcount++;
1194 if (!type)
1195 croak("Can't localize lexical variable %s",
11343788 1196 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1197 break;
1198
554b3eca 1199#ifdef USE_THREADS
2faa37cc 1200 case OP_THREADSV:
554b3eca 1201 modcount++; /* XXX ??? */
554b3eca
MB		 1202 break;
1203#endif /* USE_THREADS */
1204
748a9306
LW		 1205 case OP_PUSHMARK:
1206 break;
a0d0e21e 1207
69969c6f
SB		 1208 case OP_KEYS:
1209 if (type != OP_SASSIGN)
1210 goto nomod;
5f05dabc 1211 /* FALL THROUGH */
a0d0e21e 1212 case OP_POS:
463ee0b2 1213 case OP_VEC:
a0d0e21e 1214 case OP_SUBSTR:
11343788
MB		 1215 pad_free(o->op_targ);
1216 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1217 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1218 if (o->op_flags & OPf_KIDS)
1219 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1220 break;
a0d0e21e 1221
463ee0b2
LW		 1222 case OP_AELEM:
1223 case OP_HELEM:
11343788 1224 ref(cBINOPo->op_first, o->op_type);
68dc0745 1225 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1226 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1227 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1228 modcount++;
463ee0b2
LW		 1229 break;
1230
1231 case OP_SCOPE:
1232 case OP_LEAVE:
1233 case OP_ENTER:
11343788
MB		 1234 if (o->op_flags & OPf_KIDS)
1235 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1236 break;
1237
1238 case OP_NULL:
11343788 1239 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1240 break;
11343788
MB		 1241 if (o->op_targ != OP_LIST) {
1242 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1243 break;
1244 }
1245 /* FALL THROUGH */
463ee0b2 1246 case OP_LIST:
11343788 1247 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1248 mod(kid, type);
1249 break;
1250 }
11343788 1251 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1252
1253 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1254 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1255 else if (!type) {
11343788
MB		 1256 o->op_private |= OPpLVAL_INTRO;
1257 o->op_flags &= ~OPf_SPECIAL;
463ee0b2 1258 }
a0d0e21e 1259 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1260 o->op_flags |= OPf_REF;
1261 return o;
463ee0b2
LW		 1262}
1263
3fe9a6f1 1264static bool
8ac85365 1265scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1266{
1267 switch (type) {
1268 case OP_SASSIGN:
5196be3e 1269 if (o->op_type == OP_RV2GV)
3fe9a6f1 1270 return FALSE;
1271 /* FALL THROUGH */
1272 case OP_PREINC:
1273 case OP_PREDEC:
1274 case OP_POSTINC:
1275 case OP_POSTDEC:
1276 case OP_I_PREINC:
1277 case OP_I_PREDEC:
1278 case OP_I_POSTINC:
1279 case OP_I_POSTDEC:
1280 case OP_POW:
1281 case OP_MULTIPLY:
1282 case OP_DIVIDE:
1283 case OP_MODULO:
1284 case OP_REPEAT:
1285 case OP_ADD:
1286 case OP_SUBTRACT:
1287 case OP_I_MULTIPLY:
1288 case OP_I_DIVIDE:
1289 case OP_I_MODULO:
1290 case OP_I_ADD:
1291 case OP_I_SUBTRACT:
1292 case OP_LEFT_SHIFT:
1293 case OP_RIGHT_SHIFT:
1294 case OP_BIT_AND:
1295 case OP_BIT_XOR:
1296 case OP_BIT_OR:
1297 case OP_CONCAT:
1298 case OP_SUBST:
1299 case OP_TRANS:
1300 case OP_ANDASSIGN: /* may work later */
1301 case OP_ORASSIGN: /* may work later */
1302 return TRUE;
1303 default:
1304 return FALSE;
1305 }
1306}
1307
463ee0b2 1308OP *
8ac85365 1309refkids(OP *o, I32 type)
463ee0b2
LW		 1310{
1311 OP *kid;
11343788
MB		 1312 if (o && o->op_flags & OPf_KIDS) {
1313 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1314 ref(kid, type);
1315 }
11343788 1316 return o;
463ee0b2
LW		 1317}
1318
1319OP *
8ac85365 1320ref(OP *o, I32 type)
463ee0b2
LW		 1321{
1322 OP *kid;
463ee0b2 1323
11343788
MB		 1324 if (!o || error_count)
1325 return o;
463ee0b2 1326
11343788 1327 switch (o->op_type) {
a0d0e21e 1328 case OP_ENTERSUB:
e55aaa0e 1329 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1330 !(o->op_flags & OPf_STACKED)) {
1331 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1332 o->op_ppaddr = ppaddr[OP_RV2CV];
1333 assert(cUNOPo->op_first->op_type == OP_NULL);
1334 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1335 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1336 }
1337 break;
aeea060c 1338
463ee0b2 1339 case OP_COND_EXPR:
11343788 1340 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1341 ref(kid, type);
1342 break;
8990e307 1343 case OP_RV2SV:
11343788 1344 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1345 /* FALL THROUGH */
1346 case OP_PADSV:
5f05dabc 1347 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1348 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1349 : type == OP_RV2HV ? OPpDEREF_HV
1350 : OPpDEREF_SV);
11343788 1351 o->op_flags |= OPf_MOD;
a0d0e21e 1352 }
8990e307
LW		 1353 break;
1354
2faa37cc 1355 case OP_THREADSV:
a863c7d1
MB		 1356 o->op_flags |= OPf_MOD; /* XXX ??? */
1357 break;
1358
463ee0b2
LW		 1359 case OP_RV2AV:
1360 case OP_RV2HV:
aeea060c 1361 o->op_flags |= OPf_REF;
8990e307 1362 /* FALL THROUGH */
463ee0b2 1363 case OP_RV2GV:
11343788 1364 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1365 break;
8990e307 1366
463ee0b2
LW		 1367 case OP_PADAV:
1368 case OP_PADHV:
aeea060c 1369 o->op_flags |= OPf_REF;
79072805 1370 break;
aeea060c 1371
8990e307 1372 case OP_SCALAR:
79072805 1373 case OP_NULL:
11343788 1374 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1375 break;
11343788 1376 ref(cBINOPo->op_first, type);
79072805
LW		 1377 break;
1378 case OP_AELEM:
1379 case OP_HELEM:
11343788 1380 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1381 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1382 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1383 : type == OP_RV2HV ? OPpDEREF_HV
1384 : OPpDEREF_SV);
11343788 1385 o->op_flags |= OPf_MOD;
8990e307 1386 }
79072805
LW		 1387 break;
1388
463ee0b2 1389 case OP_SCOPE:
79072805
LW		 1390 case OP_LEAVE:
1391 case OP_ENTER:
8990e307 1392 case OP_LIST:
11343788 1393 if (!(o->op_flags & OPf_KIDS))
79072805 1394 break;
11343788 1395 ref(cLISTOPo->op_last, type);
79072805 1396 break;
a0d0e21e
LW		 1397 default:
1398 break;
79072805 1399 }
11343788 1400 return scalar(o);
8990e307 1401
79072805
LW		 1402}
1403
1404OP *
8ac85365 1405my(OP *o)
93a17b20
LW		 1406{
1407 OP *kid;
93a17b20
LW		 1408 I32 type;
1409
11343788
MB		 1410 if (!o || error_count)
1411 return o;
93a17b20 1412
11343788 1413 type = o->op_type;
93a17b20 1414 if (type == OP_LIST) {
11343788 1415 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20
LW		 1416 my(kid);
1417 }
1418 else if (type != OP_PADSV &&
1419 type != OP_PADAV &&
1420 type != OP_PADHV &&
1421 type != OP_PUSHMARK)
1422 {
5dc0d613 1423 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1424 return o;
93a17b20 1425 }
11343788
MB		 1426 o->op_flags |= OPf_MOD;
1427 o->op_private |= OPpLVAL_INTRO;
1428 return o;
93a17b20
LW		 1429}
1430
1431OP *
8ac85365 1432sawparens(OP *o)
79072805
LW		 1433{
1434 if (o)
1435 o->op_flags |= OPf_PARENS;
1436 return o;
1437}
1438
1439OP *
8ac85365 1440bind_match(I32 type, OP *left, OP *right)
79072805 1441{
11343788 1442 OP *o;
79072805 1443
2ae324a7 1444 if (dowarn &&
1445 (left->op_type == OP_RV2AV ||
1446 left->op_type == OP_RV2HV ||
1447 left->op_type == OP_PADAV ||
1448 left->op_type == OP_PADHV)) {
1449 char *desc = op_desc[(right->op_type == OP_SUBST ||
1450 right->op_type == OP_TRANS)
1451 ? right->op_type : OP_MATCH];
1452 char *sample = ((left->op_type == OP_RV2AV ||
1453 left->op_type == OP_PADAV)
1454 ? "@array" : "%hash");
1455 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1456 }
1457
79072805
LW		 1458 if (right->op_type == OP_MATCH ||
1459 right->op_type == OP_SUBST ||
1460 right->op_type == OP_TRANS) {
1461 right->op_flags |= OPf_STACKED;
1462 if (right->op_type != OP_MATCH)
463ee0b2 1463 left = mod(left, right->op_type);
79072805 1464 if (right->op_type == OP_TRANS)
11343788 1465 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1466 else
11343788 1467 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1468 if (type == OP_NOT)
11343788
MB		 1469 return newUNOP(OP_NOT, 0, scalar(o));
1470 return o;
79072805
LW		 1471 }
1472 else
1473 return bind_match(type, left,
1474 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1475}
1476
1477OP *
8ac85365 1478invert(OP *o)
79072805 1479{
11343788
MB		 1480 if (!o)
1481 return o;
79072805 1482 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1483 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1484}
1485
1486OP *
8ac85365 1487scope(OP *o)
79072805
LW		 1488{
1489 if (o) {
84902520 1490 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1491 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1492 o->op_type = OP_LEAVE;
1493 o->op_ppaddr = ppaddr[OP_LEAVE];
1494 }
1495 else {
1496 if (o->op_type == OP_LINESEQ) {
1497 OP *kid;
1498 o->op_type = OP_SCOPE;
1499 o->op_ppaddr = ppaddr[OP_SCOPE];
1500 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1501 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1502 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1503 null(kid);
748a9306 1504 }
463ee0b2
LW		 1505 }
1506 else
748a9306 1507 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1508 }
79072805
LW		 1509 }
1510 return o;
1511}
1512
a0d0e21e 1513int
8ac85365 1514block_start(int full)
79072805 1515{
11343788 1516 dTHR;
a0d0e21e 1517 int retval = savestack_ix;
55497cff 1518 SAVEI32(comppad_name_floor);
1519 if (full) {
93965878 1520 if ((comppad_name_fill = AvFILLp(comppad_name)) > 0)
55497cff 1521 comppad_name_floor = comppad_name_fill;
1522 else
1523 comppad_name_floor = 0;
1524 }
1525 SAVEI32(min_intro_pending);
1526 SAVEI32(max_intro_pending);
a0d0e21e 1527 min_intro_pending = 0;
55497cff 1528 SAVEI32(comppad_name_fill);
1529 SAVEI32(padix_floor);
a0d0e21e
LW		 1530 padix_floor = padix;
1531 pad_reset_pending = FALSE;
55497cff 1532 SAVEI32(hints);
a0d0e21e
LW		 1533 hints &= ~HINT_BLOCK_SCOPE;
1534 return retval;
1535}
1536
1537OP*
8ac85365 1538block_end(I32 floor, OP *seq)
a0d0e21e 1539{
11343788 1540 dTHR;
a0d0e21e
LW		 1541 int needblockscope = hints & HINT_BLOCK_SCOPE;
1542 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1543 LEAVE_SCOPE(floor);
1544 pad_reset_pending = FALSE;
1545 if (needblockscope)
1546 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1547 pad_leavemy(comppad_name_fill);
bbce6d69 1548 cop_seqmax++;
a0d0e21e
LW		 1549 return retval;
1550}
1551
54b9620d
MB		 1552static OP *
1553newDEFSVOP(void)
1554{
1555#ifdef USE_THREADS
1556 OP *o = newOP(OP_THREADSV, 0);
1557 o->op_targ = find_threadsv("_");
1558 return o;
1559#else
1560 return newSVREF(newGVOP(OP_GV, 0, defgv));
1561#endif /* USE_THREADS */
1562}
1563
a0d0e21e 1564void
8ac85365 1565newPROG(OP *o)
a0d0e21e 1566{
11343788 1567 dTHR;
a0d0e21e 1568 if (in_eval) {
5dc0d613 1569 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1570 eval_start = linklist(eval_root);
1571 eval_root->op_next = 0;
1572 peep(eval_start);
1573 }
1574 else {
5dc0d613 1575 if (!o)
a0d0e21e 1576 return;
11343788 1577 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1578 curcop = &compiling;
1579 main_start = LINKLIST(main_root);
1580 main_root->op_next = 0;
1581 peep(main_start);
748a9306 1582 compcv = 0;
3841441e 1583
4fdae800 1584 /* Register with debugger */
84902520 1585 if (PERLDB_INTER) {
3841441e 1586 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1587 if (cv) {
1588 dSP;
1589 PUSHMARK(sp);
1590 XPUSHs((SV*)compiling.cop_filegv);
1591 PUTBACK;
1592 perl_call_sv((SV*)cv, G_DISCARD);
1593 }
1594 }
79072805 1595 }
79072805
LW		 1596}
1597
1598OP *
8ac85365 1599localize(OP *o, I32 lex)
79072805
LW		 1600{
1601 if (o->op_flags & OPf_PARENS)
1602 list(o);
8990e307 1603 else {
8990e307
LW		 1604 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1605 char *s;
1606 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1607 if (*s == ';' || *s == '=')
8990e307
LW		 1608 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1609 }
1610 }
93a17b20 1611 in_my = FALSE;
c750a3ec 1612 in_my_stash = Nullhv;
93a17b20
LW		 1613 if (lex)
1614 return my(o);
1615 else
463ee0b2 1616 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1617}
1618
1619OP *
8ac85365 1620jmaybe(OP *o)
79072805
LW		 1621{
1622 if (o->op_type == OP_LIST) {
554b3eca
MB		 1623 OP *o2;
1624#ifdef USE_THREADS
2faa37cc 1625 o2 = newOP(OP_THREADSV, 0);
54b9620d 1626 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1627#else
1628 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1629#endif /* USE_THREADS */
1630 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1631 }
1632 return o;
1633}
1634
1635OP *
8ac85365 1636fold_constants(register OP *o)
79072805 1637{
11343788 1638 dTHR;
79072805
LW		 1639 register OP *curop;
1640 I32 type = o->op_type;
748a9306 1641 SV *sv;
79072805
LW		 1642
1643 if (opargs[type] & OA_RETSCALAR)
1644 scalar(o);
1645 if (opargs[type] & OA_TARGET)
ed6116ce 1646 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1647
85e6fe83 1648 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1649 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1650
79072805
LW		 1651 if (!(opargs[type] & OA_FOLDCONST))
1652 goto nope;
1653
de939608
CS		 1654 switch (type) {
1655 case OP_SPRINTF:
1656 case OP_UCFIRST:
1657 case OP_LCFIRST:
1658 case OP_UC:
1659 case OP_LC:
69dcf70c
MB		 1660 case OP_SLT:
1661 case OP_SGT:
1662 case OP_SLE:
1663 case OP_SGE:
1664 case OP_SCMP:
1665
de939608
CS		 1666 if (o->op_private & OPpLOCALE)
1667 goto nope;
1668 }
1669
a0d0e21e
LW		 1670 if (error_count)
1671 goto nope; /* Don't try to run w/ errors */
1672
79072805 1673 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1674 if (curop->op_type != OP_CONST &&
1675 curop->op_type != OP_LIST &&
1676 curop->op_type != OP_SCALAR &&
a0d0e21e 1677 curop->op_type != OP_NULL &&
93a17b20 1678 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1679 goto nope;
1680 }
1681 }
1682
1683 curop = LINKLIST(o);
1684 o->op_next = 0;
1685 op = curop;
8da795c6 1686 runops();
748a9306
LW		 1687 sv = *(stack_sp--);
1688 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1689 pad_swipe(o->op_targ);
748a9306
LW		 1690 else if (SvTEMP(sv)) { /* grab mortal temp? */
1691 (void)SvREFCNT_inc(sv);
1692 SvTEMP_off(sv);
85e6fe83 1693 }
79072805
LW		 1694 op_free(o);
1695 if (type == OP_RV2GV)
b1cb66bf 1696 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306
LW		 1697 else {
1698 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK) {
1699 IV iv = SvIV(sv);
1700 if ((double)iv == SvNV(sv)) { /* can we smush double to int */
1701 SvREFCNT_dec(sv);
1702 sv = newSViv(iv);
1703 }
b1cb66bf 1704 else
1705 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1706 }
1707 return newSVOP(OP_CONST, 0, sv);
1708 }
aeea060c 1709
79072805
LW		 1710 nope:
1711 if (!(opargs[type] & OA_OTHERINT))
1712 return o;
79072805 1713
85e6fe83 1714 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1715 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1716 return o;
1717
1718 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1719 if (curop->op_type == OP_CONST) {
b1cb66bf 1720 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1721 continue;
1722 return o;
1723 }
1724 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1725 continue;
1726 return o;
1727 }
a0d0e21e 1728 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1729 }
1730
79072805
LW		 1731 return o;
1732}
1733
1734OP *
8ac85365 1735gen_constant_list(register OP *o)
79072805 1736{
11343788 1737 dTHR;
79072805 1738 register OP *curop;
79072805 1739 I32 oldtmps_floor = tmps_floor;
79072805 1740
a0d0e21e
LW		 1741 list(o);
1742 if (error_count)
1743 return o; /* Don't attempt to run with errors */
1744
1745 op = curop = LINKLIST(o);
1746 o->op_next = 0;
11343788 1747 pp_pushmark(ARGS);
8da795c6 1748 runops();
a0d0e21e 1749 op = curop;
11343788 1750 pp_anonlist(ARGS);
79072805 1751 tmps_floor = oldtmps_floor;
79072805
LW		 1752
1753 o->op_type = OP_RV2AV;
1754 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1755 curop = ((UNOP*)o)->op_first;
a0d0e21e 1756 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1757 op_free(curop);
79072805
LW		 1758 linklist(o);
1759 return list(o);
1760}
1761
1762OP *
8ac85365 1763convert(I32 type, I32 flags, OP *o)
79072805
LW		 1764{
1765 OP *kid;
a0d0e21e 1766 OP *last = 0;
79072805 1767
11343788
MB		 1768 if (!o || o->op_type != OP_LIST)
1769 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1770 else
5dc0d613 1771 o->op_flags &= ~OPf_WANT;
79072805 1772
8990e307 1773 if (!(opargs[type] & OA_MARK))
11343788 1774 null(cLISTOPo->op_first);
8990e307 1775
11343788
MB		 1776 o->op_type = type;
1777 o->op_ppaddr = ppaddr[type];
1778 o->op_flags |= flags;
79072805 1779
11343788
MB		 1780 o = CHECKOP(type, o);
1781 if (o->op_type != type)
1782 return o;
79072805 1783
11343788 1784 if (cLISTOPo->op_children < 7) {
79072805 1785 /* XXX do we really need to do this if we're done appending?? */
11343788 1786 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1787 last = kid;
11343788 1788 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1789 }
1790
11343788 1791 return fold_constants(o);
79072805
LW		 1792}
1793
1794/* List constructors */
1795
1796OP *
8ac85365 1797append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1798{
1799 if (!first)
1800 return last;
8990e307
LW		 1801
1802 if (!last)
79072805 1803 return first;
8990e307 1804
a0d0e21e
LW		 1805 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1806 return newLISTOP(type, 0, first, last);
79072805 1807
a0d0e21e
LW		 1808 if (first->op_flags & OPf_KIDS)
1809 ((LISTOP*)first)->op_last->op_sibling = last;
1810 else {
1811 first->op_flags |= OPf_KIDS;
1812 ((LISTOP*)first)->op_first = last;
1813 }
1814 ((LISTOP*)first)->op_last = last;
1815 ((LISTOP*)first)->op_children++;
1816 return first;
79072805
LW		 1817}
1818
1819OP *
8ac85365 1820append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1821{
1822 if (!first)
1823 return (OP*)last;
8990e307
LW		 1824
1825 if (!last)
79072805 1826 return (OP*)first;
8990e307
LW		 1827
1828 if (first->op_type != type)
79072805 1829 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1830
1831 if (last->op_type != type)
79072805
LW		 1832 return append_elem(type, (OP*)first, (OP*)last);
1833
1834 first->op_last->op_sibling = last->op_first;
1835 first->op_last = last->op_last;
1836 first->op_children += last->op_children;
1837 if (first->op_children)
1838 last->op_flags |= OPf_KIDS;
1839
1840 Safefree(last);
1841 return (OP*)first;
1842}
1843
1844OP *
8ac85365 1845prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1846{
1847 if (!first)
1848 return last;
8990e307
LW		 1849
1850 if (!last)
79072805 1851 return first;
8990e307
LW		 1852
1853 if (last->op_type == type) {
1854 if (type == OP_LIST) { /* already a PUSHMARK there */
1855 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1856 ((LISTOP*)last)->op_first->op_sibling = first;
1857 }
1858 else {
1859 if (!(last->op_flags & OPf_KIDS)) {
1860 ((LISTOP*)last)->op_last = first;
1861 last->op_flags |= OPf_KIDS;
1862 }
1863 first->op_sibling = ((LISTOP*)last)->op_first;
1864 ((LISTOP*)last)->op_first = first;
79072805 1865 }
79072805
LW		 1866 ((LISTOP*)last)->op_children++;
1867 return last;
1868 }
1869
1870 return newLISTOP(type, 0, first, last);
1871}
1872
1873/* Constructors */
1874
1875OP *
8ac85365 1876newNULLLIST(void)
79072805 1877{
8990e307
LW		 1878 return newOP(OP_STUB, 0);
1879}
1880
1881OP *
8ac85365 1882force_list(OP *o)
8990e307 1883{
11343788
MB		 1884 if (!o || o->op_type != OP_LIST)
1885 o = newLISTOP(OP_LIST, 0, o, Nullop);
1886 null(o);
1887 return o;
79072805
LW		 1888}
1889
1890OP *
8ac85365 1891newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1892{
1893 LISTOP *listop;
1894
1895 Newz(1101, listop, 1, LISTOP);
1896
1897 listop->op_type = type;
1898 listop->op_ppaddr = ppaddr[type];
1899 listop->op_children = (first != 0) + (last != 0);
1900 listop->op_flags = flags;
79072805
LW		 1901
1902 if (!last && first)
1903 last = first;
1904 else if (!first && last)
1905 first = last;
8990e307
LW		 1906 else if (first)
1907 first->op_sibling = last;
79072805
LW		 1908 listop->op_first = first;
1909 listop->op_last = last;
8990e307
LW		 1910 if (type == OP_LIST) {
1911 OP* pushop;
1912 pushop = newOP(OP_PUSHMARK, 0);
1913 pushop->op_sibling = first;
1914 listop->op_first = pushop;
1915 listop->op_flags |= OPf_KIDS;
1916 if (!last)
1917 listop->op_last = pushop;
1918 }
1919 else if (listop->op_children)
1920 listop->op_flags |= OPf_KIDS;
79072805
LW		 1921
1922 return (OP*)listop;
1923}
1924
1925OP *
8ac85365 1926newOP(I32 type, I32 flags)
79072805 1927{
11343788
MB		 1928 OP *o;
1929 Newz(1101, o, 1, OP);
1930 o->op_type = type;
1931 o->op_ppaddr = ppaddr[type];
1932 o->op_flags = flags;
79072805 1933
11343788
MB		 1934 o->op_next = o;
1935 o->op_private = 0 + (flags >> 8);
79072805 1936 if (opargs[type] & OA_RETSCALAR)
11343788 1937 scalar(o);
79072805 1938 if (opargs[type] & OA_TARGET)
11343788
MB		 1939 o->op_targ = pad_alloc(type, SVs_PADTMP);
1940 return CHECKOP(type, o);
79072805
LW		 1941}
1942
1943OP *
8ac85365 1944newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1945{
1946 UNOP *unop;
1947
93a17b20 1948 if (!first)
aeea060c 1949 first = newOP(OP_STUB, 0);
8990e307
LW		 1950 if (opargs[type] & OA_MARK)
1951 first = force_list(first);
93a17b20 1952
79072805
LW		 1953 Newz(1101, unop, 1, UNOP);
1954 unop->op_type = type;
1955 unop->op_ppaddr = ppaddr[type];
1956 unop->op_first = first;
1957 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1958 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1959#if 1
1960 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1961 first->op_type = OP_PUSHRE;
1962 first->op_ppaddr = ppaddr[OP_PUSHRE];
1963 }
1964#endif
e50aee73 1965 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1966 if (unop->op_next)
1967 return (OP*)unop;
1968
a0d0e21e 1969 return fold_constants((OP *) unop);
79072805
LW		 1970}
1971
1972OP *
8ac85365 1973newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1974{
1975 BINOP *binop;
1976 Newz(1101, binop, 1, BINOP);
1977
1978 if (!first)
1979 first = newOP(OP_NULL, 0);
1980
1981 binop->op_type = type;
1982 binop->op_ppaddr = ppaddr[type];
1983 binop->op_first = first;
1984 binop->op_flags = flags | OPf_KIDS;
1985 if (!last) {
1986 last = first;
c07a80fd 1987 binop->op_private = 1 | (flags >> 8);
79072805
LW		 1988 }
1989 else {
c07a80fd 1990 binop->op_private = 2 | (flags >> 8);
79072805
LW		 1991 first->op_sibling = last;
1992 }
1993
e50aee73 1994 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 1995 if (binop->op_next)
1996 return (OP*)binop;
1997
1998 binop->op_last = last = binop->op_first->op_sibling;
1999
a0d0e21e 2000 return fold_constants((OP *)binop);
79072805
LW		 2001}
2002
2003OP *
8ac85365 2004pmtrans(OP *o, OP *expr, OP *repl)
79072805 2005{
79072805
LW		 2006 SV *tstr = ((SVOP*)expr)->op_sv;
2007 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2008 STRLEN tlen;
2009 STRLEN rlen;
ec49126f 2010 register U8 *t = (U8*)SvPV(tstr, tlen);
2011 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2012 register I32 i;
2013 register I32 j;
8ac85365 2014 I32 Delete;
79072805 2015 I32 complement;
5d06d08e 2016 I32 squash;
79072805
LW		 2017 register short *tbl;
2018
11343788
MB		 2019 tbl = (short*)cPVOPo->op_pv;
2020 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 2021 Delete = o->op_private & OPpTRANS_DELETE;
5d06d08e 2022 squash = o->op_private & OPpTRANS_SQUASH;
79072805
LW		 2023
2024 if (complement) {
2025 Zero(tbl, 256, short);
2026 for (i = 0; i < tlen; i++)
ec49126f 2027 tbl[t[i]] = -1;
79072805
LW		 2028 for (i = 0, j = 0; i < 256; i++) {
2029 if (!tbl[i]) {
2030 if (j >= rlen) {
8ac85365 2031 if (Delete)
79072805
LW		 2032 tbl[i] = -2;
2033 else if (rlen)
ec49126f 2034 tbl[i] = r[j-1];
79072805
LW		 2035 else
2036 tbl[i] = i;
2037 }
2038 else
ec49126f 2039 tbl[i] = r[j++];
79072805
LW		 2040 }
2041 }
2042 }
2043 else {
8ac85365 2044 if (!rlen && !Delete) {
79072805 2045 r = t; rlen = tlen;
5d06d08e
MB		 2046 if (!squash)
2047 o->op_private |= OPpTRANS_COUNTONLY;
79072805
LW		 2048 }
2049 for (i = 0; i < 256; i++)
2050 tbl[i] = -1;
2051 for (i = 0, j = 0; i < tlen; i++,j++) {
2052 if (j >= rlen) {
8ac85365 2053 if (Delete) {
ec49126f 2054 if (tbl[t[i]] == -1)
2055 tbl[t[i]] = -2;
79072805
LW		 2056 continue;
2057 }
2058 --j;
2059 }
ec49126f 2060 if (tbl[t[i]] == -1)
2061 tbl[t[i]] = r[j];
79072805
LW		 2062 }
2063 }
2064 op_free(expr);
2065 op_free(repl);
2066
11343788 2067 return o;
79072805
LW		 2068}
2069
2070OP *
8ac85365 2071newPMOP(I32 type, I32 flags)
79072805 2072{
11343788 2073 dTHR;
79072805
LW		 2074 PMOP *pmop;
2075
2076 Newz(1101, pmop, 1, PMOP);
2077 pmop->op_type = type;
2078 pmop->op_ppaddr = ppaddr[type];
2079 pmop->op_flags = flags;
c07a80fd 2080 pmop->op_private = 0 | (flags >> 8);
79072805 2081
36477c24 2082 if (hints & HINT_LOCALE)
2083 pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE);
2084
79072805 2085 /* link into pm list */
a0d0e21e 2086 if (type != OP_TRANS && curstash) {
79072805
LW		 2087 pmop->op_pmnext = HvPMROOT(curstash);
2088 HvPMROOT(curstash) = pmop;
2089 }
2090
2091 return (OP*)pmop;
2092}
2093
2094OP *
8ac85365 2095pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2096{
2097 PMOP *pm;
2098 LOGOP *rcop;
2099
11343788
MB		 2100 if (o->op_type == OP_TRANS)
2101 return pmtrans(o, expr, repl);
79072805 2102
3e3baf6d 2103 hints |= HINT_BLOCK_SCOPE;
11343788 2104 pm = (PMOP*)o;
79072805
LW		 2105
2106 if (expr->op_type == OP_CONST) {
463ee0b2 2107 STRLEN plen;
79072805 2108 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2109 char *p = SvPV(pat, plen);
11343788 2110 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2111 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2112 p = SvPV(pat, plen);
79072805
LW		 2113 pm->op_pmflags |= PMf_SKIPWHITE;
2114 }
e50aee73 2115 pm->op_pmregexp = pregcomp(p, p + plen, pm);
aeea060c 2116 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2117 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2118 op_free(expr);
2119 }
2120 else {
463ee0b2
LW		 2121 if (pm->op_pmflags & PMf_KEEP)
2122 expr = newUNOP(OP_REGCMAYBE,0,expr);
2123
79072805
LW		 2124 Newz(1101, rcop, 1, LOGOP);
2125 rcop->op_type = OP_REGCOMP;
2126 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2127 rcop->op_first = scalar(expr);
2128 rcop->op_flags |= OPf_KIDS;
2129 rcop->op_private = 1;
11343788 2130 rcop->op_other = o;
79072805
LW		 2131
2132 /* establish postfix order */
463ee0b2
LW		 2133 if (pm->op_pmflags & PMf_KEEP) {
2134 LINKLIST(expr);
2135 rcop->op_next = expr;
2136 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2137 }
2138 else {
2139 rcop->op_next = LINKLIST(expr);
2140 expr->op_next = (OP*)rcop;
2141 }
79072805 2142
11343788 2143 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2144 }
2145
2146 if (repl) {
748a9306
LW		 2147 OP *curop;
2148 if (pm->op_pmflags & PMf_EVAL)
2149 curop = 0;
554b3eca 2150#ifdef USE_THREADS
2faa37cc 2151 else if (repl->op_type == OP_THREADSV
554b3eca 2152 && strchr("&`'123456789+",
54b9620d 2153 threadsv_names[repl->op_targ]))
554b3eca
MB		 2154 {
2155 curop = 0;
2156 }
2157#endif /* USE_THREADS */
748a9306
LW		 2158 else if (repl->op_type == OP_CONST)
2159 curop = repl;
79072805 2160 else {
79072805
LW		 2161 OP *lastop = 0;
2162 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2163 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2164#ifdef USE_THREADS
2faa37cc 2165 if (curop->op_type == OP_THREADSV
554b3eca
MB		 2166 && strchr("&`'123456789+", curop->op_private)) {
2167 break;
2168 }
2169#else
79072805
LW		 2170 if (curop->op_type == OP_GV) {
2171 GV *gv = ((GVOP*)curop)->op_gv;
93a17b20 2172 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2173 break;
2174 }
554b3eca 2175#endif /* USE_THREADS */
79072805
LW		 2176 else if (curop->op_type == OP_RV2CV)
2177 break;
2178 else if (curop->op_type == OP_RV2SV ||
2179 curop->op_type == OP_RV2AV ||
2180 curop->op_type == OP_RV2HV ||
2181 curop->op_type == OP_RV2GV) {
2182 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2183 break;
2184 }
748a9306
LW		 2185 else if (curop->op_type == OP_PADSV ||
2186 curop->op_type == OP_PADAV ||
2187 curop->op_type == OP_PADHV ||
554b3eca 2188 curop->op_type == OP_PADANY) {
748a9306
LW		 2189 /* is okay */
2190 }
79072805
LW		 2191 else
2192 break;
2193 }
2194 lastop = curop;
2195 }
748a9306
LW		 2196 }
2197 if (curop == repl) {
2198 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2199 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2200 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2201 }
2202 else {
2203 Newz(1101, rcop, 1, LOGOP);
2204 rcop->op_type = OP_SUBSTCONT;
2205 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2206 rcop->op_first = scalar(repl);
2207 rcop->op_flags |= OPf_KIDS;
2208 rcop->op_private = 1;
11343788 2209 rcop->op_other = o;
748a9306
LW		 2210
2211 /* establish postfix order */
2212 rcop->op_next = LINKLIST(repl);
2213 repl->op_next = (OP*)rcop;
2214
2215 pm->op_pmreplroot = scalar((OP*)rcop);
2216 pm->op_pmreplstart = LINKLIST(rcop);
2217 rcop->op_next = 0;
79072805
LW		 2218 }
2219 }
2220
2221 return (OP*)pm;
2222}
2223
2224OP *
8ac85365 2225newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2226{
2227 SVOP *svop;
2228 Newz(1101, svop, 1, SVOP);
2229 svop->op_type = type;
2230 svop->op_ppaddr = ppaddr[type];
2231 svop->op_sv = sv;
2232 svop->op_next = (OP*)svop;
2233 svop->op_flags = flags;
2234 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2235 scalar((OP*)svop);
79072805 2236 if (opargs[type] & OA_TARGET)
ed6116ce 2237 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2238 return CHECKOP(type, svop);
79072805
LW		 2239}
2240
2241OP *
8ac85365 2242newGVOP(I32 type, I32 flags, GV *gv)
79072805 2243{
11343788 2244 dTHR;
79072805
LW		 2245 GVOP *gvop;
2246 Newz(1101, gvop, 1, GVOP);
2247 gvop->op_type = type;
2248 gvop->op_ppaddr = ppaddr[type];
8990e307 2249 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2250 gvop->op_next = (OP*)gvop;
2251 gvop->op_flags = flags;
2252 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2253 scalar((OP*)gvop);
79072805 2254 if (opargs[type] & OA_TARGET)
ed6116ce 2255 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2256 return CHECKOP(type, gvop);
79072805
LW		 2257}
2258
2259OP *
8ac85365 2260newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2261{
2262 PVOP *pvop;
2263 Newz(1101, pvop, 1, PVOP);
2264 pvop->op_type = type;
2265 pvop->op_ppaddr = ppaddr[type];
2266 pvop->op_pv = pv;
2267 pvop->op_next = (OP*)pvop;
2268 pvop->op_flags = flags;
2269 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2270 scalar((OP*)pvop);
79072805 2271 if (opargs[type] & OA_TARGET)
ed6116ce 2272 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2273 return CHECKOP(type, pvop);
79072805
LW		 2274}
2275
79072805 2276void
8ac85365 2277package(OP *o)
79072805 2278{
11343788 2279 dTHR;
93a17b20 2280 SV *sv;
79072805
LW		 2281
2282 save_hptr(&curstash);
2283 save_item(curstname);
11343788 2284 if (o) {
463ee0b2
LW		 2285 STRLEN len;
2286 char *name;
11343788 2287 sv = cSVOPo->op_sv;
463ee0b2 2288 name = SvPV(sv, len);
b1cb66bf 2289 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2290 sv_setpvn(curstname, name, len);
11343788 2291 op_free(o);
93a17b20
LW		 2292 }
2293 else {
2294 sv_setpv(curstname,"<none>");
2295 curstash = Nullhv;
2296 }
79072805 2297 copline = NOLINE;
8990e307 2298 expect = XSTATE;
79072805
LW		 2299}
2300
85e6fe83 2301void
8ac85365 2302utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2303{
a0d0e21e
LW		 2304 OP *pack;
2305 OP *meth;
2306 OP *rqop;
2307 OP *imop;
b1cb66bf 2308 OP *veop;
85e6fe83 2309
a0d0e21e
LW		 2310 if (id->op_type != OP_CONST)
2311 croak("Module name must be constant");
85e6fe83 2312
b1cb66bf 2313 veop = Nullop;
2314
2315 if(version != Nullop) {
2316 SV *vesv = ((SVOP*)version)->op_sv;
2317
2318 if (arg == Nullop && !SvNIOK(vesv)) {
2319 arg = version;
2320 }
2321 else {
2322 OP *pack;
2323 OP *meth;
2324
2325 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2326 croak("Version number must be constant number");
2327
2328 /* Make copy of id so we don't free it twice */
2329 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2330
2331 /* Fake up a method call to VERSION */
2332 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2333 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2334 append_elem(OP_LIST,
2335 prepend_elem(OP_LIST, pack, list(version)),
2336 newUNOP(OP_METHOD, 0, meth)));
2337 }
2338 }
aeea060c 2339
a0d0e21e 2340 /* Fake up an import/unimport */
4633a7c4
LW		 2341 if (arg && arg->op_type == OP_STUB)
2342 imop = arg; /* no import on explicit () */
b1cb66bf 2343 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2344 imop = Nullop; /* use 5.0; */
2345 }
4633a7c4
LW		 2346 else {
2347 /* Make copy of id so we don't free it twice */
2348 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2349 meth = newSVOP(OP_CONST, 0,
2350 aver
2351 ? newSVpv("import", 6)
2352 : newSVpv("unimport", 8)
2353 );
2354 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2355 append_elem(OP_LIST,
2356 prepend_elem(OP_LIST, pack, list(arg)),
2357 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2358 }
2359
2360 /* Fake up a require */
2361 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2362
2363 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2364 newSUB(floor,
a0d0e21e 2365 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2366 Nullop,
a0d0e21e 2367 append_elem(OP_LINESEQ,
b1cb66bf 2368 append_elem(OP_LINESEQ,
2369 newSTATEOP(0, Nullch, rqop),
2370 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2371 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2372
85e6fe83
LW		 2373 copline = NOLINE;
2374 expect = XSTATE;
2375}
2376
79072805 2377OP *
8ac85365 2378newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2379{
2380 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2381 list(force_list(subscript)),
2382 list(force_list(listval)) );
79072805
LW		 2383}
2384
2385static I32
8ac85365 2386list_assignment(register OP *o)
79072805 2387{
11343788 2388 if (!o)
79072805
LW		 2389 return TRUE;
2390
11343788
MB		 2391 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2392 o = cUNOPo->op_first;
79072805 2393
11343788
MB		 2394 if (o->op_type == OP_COND_EXPR) {
2395 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2396 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2397
2398 if (t && f)
2399 return TRUE;
2400 if (t || f)
2401 yyerror("Assignment to both a list and a scalar");
2402 return FALSE;
2403 }
2404
11343788
MB		 2405 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2406 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2407 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2408 return TRUE;
2409
11343788 2410 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2411 return TRUE;
2412
11343788 2413 if (o->op_type == OP_RV2SV)
79072805
LW		 2414 return FALSE;
2415
2416 return FALSE;
2417}
2418
2419OP *
8ac85365 2420newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2421{
11343788 2422 OP *o;
79072805 2423
a0d0e21e
LW		 2424 if (optype) {
2425 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2426 return newLOGOP(optype, 0,
2427 mod(scalar(left), optype),
2428 newUNOP(OP_SASSIGN, 0, scalar(right)));
2429 }
2430 else {
2431 return newBINOP(optype, OPf_STACKED,
2432 mod(scalar(left), optype), scalar(right));
2433 }
2434 }
2435
79072805 2436 if (list_assignment(left)) {
463ee0b2 2437 modcount = 0;
748a9306 2438 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2439 left = mod(left, OP_AASSIGN);
748a9306
LW		 2440 if (eval_start)
2441 eval_start = 0;
2442 else {
a0d0e21e
LW		 2443 op_free(left);
2444 op_free(right);
2445 return Nullop;
2446 }
11343788 2447 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2448 list(force_list(right)),
2449 list(force_list(left)) );
11343788 2450 o->op_private = 0 | (flags >> 8);
a0d0e21e 2451 if (!(left->op_private & OPpLVAL_INTRO)) {
748a9306 2452 static int generation = 100;
79072805 2453 OP *curop;
11343788 2454 OP *lastop = o;
79072805 2455 generation++;
11343788 2456 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2457 if (opargs[curop->op_type] & OA_DANGEROUS) {
2458 if (curop->op_type == OP_GV) {
2459 GV *gv = ((GVOP*)curop)->op_gv;
2460 if (gv == defgv || SvCUR(gv) == generation)
2461 break;
2462 SvCUR(gv) = generation;
2463 }
748a9306
LW		 2464 else if (curop->op_type == OP_PADSV ||
2465 curop->op_type == OP_PADAV ||
2466 curop->op_type == OP_PADHV ||
2467 curop->op_type == OP_PADANY) {
2468 SV **svp = AvARRAY(comppad_name);
8e07c86e 2469 SV *sv = svp[curop->op_targ];
748a9306
LW		 2470 if (SvCUR(sv) == generation)
2471 break;
2472 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2473 }
79072805
LW		 2474 else if (curop->op_type == OP_RV2CV)
2475 break;
2476 else if (curop->op_type == OP_RV2SV ||
2477 curop->op_type == OP_RV2AV ||
2478 curop->op_type == OP_RV2HV ||
2479 curop->op_type == OP_RV2GV) {
2480 if (lastop->op_type != OP_GV) /* funny deref? */
2481 break;
2482 }
2483 else
2484 break;
2485 }
2486 lastop = curop;
2487 }
11343788
MB		 2488 if (curop != o)
2489 o->op_private = OPpASSIGN_COMMON;
79072805 2490 }
c07a80fd 2491 if (right && right->op_type == OP_SPLIT) {
2492 OP* tmpop;
2493 if ((tmpop = ((LISTOP*)right)->op_first) &&
2494 tmpop->op_type == OP_PUSHRE)
2495 {
2496 PMOP *pm = (PMOP*)tmpop;
2497 if (left->op_type == OP_RV2AV &&
2498 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2499 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2500 {
2501 tmpop = ((UNOP*)left)->op_first;
2502 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2503 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2504 pm->op_pmflags |= PMf_ONCE;
11343788 2505 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2506 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2507 tmpop->op_sibling = Nullop; /* don't free split */
2508 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2509 op_free(o); /* blow off assign */
54310121 2510 right->op_flags &= ~OPf_WANT;
a5f75d66 2511 /* "I don't know and I don't care." */
c07a80fd 2512 return right;
2513 }
2514 }
2515 else {
2516 if (modcount < 10000 &&
2517 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2518 {
2519 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2520 if (SvIVX(sv) == 0)
2521 sv_setiv(sv, modcount+1);
2522 }
2523 }
2524 }
2525 }
11343788 2526 return o;
79072805
LW		 2527 }
2528 if (!right)
2529 right = newOP(OP_UNDEF, 0);
2530 if (right->op_type == OP_READLINE) {
2531 right->op_flags |= OPf_STACKED;
463ee0b2 2532 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2533 }
a0d0e21e 2534 else {
748a9306 2535 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2536 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2537 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2538 if (eval_start)
2539 eval_start = 0;
2540 else {
11343788 2541 op_free(o);
a0d0e21e
LW		 2542 return Nullop;
2543 }
2544 }
11343788 2545 return o;
79072805
LW		 2546}
2547
2548OP *
8ac85365 2549newSTATEOP(I32 flags, char *label, OP *o)
79072805 2550{
11343788 2551 dTHR;
bbce6d69 2552 U32 seq = intro_my();
79072805
LW		 2553 register COP *cop;
2554
2555 Newz(1101, cop, 1, COP);
84902520 2556 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2557 cop->op_type = OP_DBSTATE;
2558 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2559 }
2560 else {
2561 cop->op_type = OP_NEXTSTATE;
2562 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2563 }
79072805 2564 cop->op_flags = flags;
c07a80fd 2565 cop->op_private = 0 | (flags >> 8);
ff0cee69 2566#ifdef NATIVE_HINTS
2567 cop->op_private |= NATIVE_HINTS;
2568#endif
79072805
LW		 2569 cop->op_next = (OP*)cop;
2570
463ee0b2
LW		 2571 if (label) {
2572 cop->cop_label = label;
85e6fe83 2573 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2574 }
bbce6d69 2575 cop->cop_seq = seq;
a0d0e21e 2576 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2577
2578 if (copline == NOLINE)
2579 cop->cop_line = curcop->cop_line;
2580 else {
2581 cop->cop_line = copline;
2582 copline = NOLINE;
2583 }
44a8e56a 2584 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2585 cop->cop_stash = curstash;
2586
84902520 2587 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2588 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2589 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2590 (void)SvIOK_on(*svp);
a5f75d66 2591 SvIVX(*svp) = 1;
93a17b20
LW		 2592 SvSTASH(*svp) = (HV*)cop;
2593 }
2594 }
2595
11343788 2596 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2597}
2598
bbce6d69 2599/* "Introduce" my variables to visible status. */
2600U32
8ac85365 2601intro_my(void)
bbce6d69 2602{
2603 SV **svp;
2604 SV *sv;
2605 I32 i;
2606
2607 if (! min_intro_pending)
2608 return cop_seqmax;
2609
2610 svp = AvARRAY(comppad_name);
2611 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2612 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2613 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2614 SvNVX(sv) = (double)cop_seqmax;
2615 }
2616 }
2617 min_intro_pending = 0;
2618 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2619 return cop_seqmax++;
2620}
2621
79072805 2622OP *
8ac85365 2623newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2624{
11343788 2625 dTHR;
79072805 2626 LOGOP *logop;
11343788 2627 OP *o;
79072805 2628
a0d0e21e
LW		 2629 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2630 return newBINOP(type, flags, scalar(first), scalar(other));
2631
8990e307 2632 scalarboolean(first);
79072805
LW		 2633 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2634 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2635 if (type == OP_AND || type == OP_OR) {
2636 if (type == OP_AND)
2637 type = OP_OR;
2638 else
2639 type = OP_AND;
11343788
MB		 2640 o = first;
2641 first = cUNOPo->op_first;
2642 if (o->op_next)
2643 first->op_next = o->op_next;
2644 cUNOPo->op_first = Nullop;
2645 op_free(o);
79072805
LW		 2646 }
2647 }
2648 if (first->op_type == OP_CONST) {
93a17b20 2649 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2650 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2651 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2652 op_free(first);
2653 return other;
2654 }
2655 else {
2656 op_free(other);
2657 return first;
2658 }
2659 }
2660 else if (first->op_type == OP_WANTARRAY) {
2661 if (type == OP_AND)
2662 list(other);
2663 else
2664 scalar(other);
2665 }
a6006777 2666 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2667 OP *k1 = ((UNOP*)first)->op_first;
2668 OP *k2 = k1->op_sibling;
2669 OPCODE warnop = 0;
2670 switch (first->op_type)
2671 {
2672 case OP_NULL:
2673 if (k2 && k2->op_type == OP_READLINE
2674 && (k2->op_flags & OPf_STACKED)
2675 && (k1->op_type == OP_RV2SV || k1->op_type == OP_PADSV))
2676 warnop = k2->op_type;
2677 break;
2678
2679 case OP_SASSIGN:
68dc0745 2680 if (k1->op_type == OP_READDIR
2681 || k1->op_type == OP_GLOB
2682 || k1->op_type == OP_EACH)
a6006777 2683 warnop = k1->op_type;
2684 break;
2685 }
8ebc5c01 2686 if (warnop) {
2687 line_t oldline = curcop->cop_line;
2688 curcop->cop_line = copline;
68dc0745 2689 warn("Value of %s%s can be \"0\"; test with defined()",
2690 op_desc[warnop],
2691 ((warnop == OP_READLINE || warnop == OP_GLOB)
2692 ? " construct" : "() operator"));
2693 curcop->cop_line = oldline;
8ebc5c01 2694 }
a6006777 2695 }
79072805
LW		 2696
2697 if (!other)
2698 return first;
2699
a0d0e21e
LW		 2700 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2701 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2702
79072805
LW		 2703 Newz(1101, logop, 1, LOGOP);
2704
2705 logop->op_type = type;
2706 logop->op_ppaddr = ppaddr[type];
2707 logop->op_first = first;
2708 logop->op_flags = flags | OPf_KIDS;
2709 logop->op_other = LINKLIST(other);
c07a80fd 2710 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2711
2712 /* establish postfix order */
2713 logop->op_next = LINKLIST(first);
2714 first->op_next = (OP*)logop;
2715 first->op_sibling = other;
2716
11343788
MB		 2717 o = newUNOP(OP_NULL, 0, (OP*)logop);
2718 other->op_next = o;
79072805 2719
11343788 2720 return o;
79072805
LW		 2721}
2722
2723OP *
8ac85365 2724newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2725{
11343788 2726 dTHR;
79072805 2727 CONDOP *condop;
11343788 2728 OP *o;
79072805 2729
b1cb66bf 2730 if (!falseop)
2731 return newLOGOP(OP_AND, 0, first, trueop);
2732 if (!trueop)
2733 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2734
8990e307 2735 scalarboolean(first);
79072805
LW		 2736 if (first->op_type == OP_CONST) {
2737 if (SvTRUE(((SVOP*)first)->op_sv)) {
2738 op_free(first);
b1cb66bf 2739 op_free(falseop);
2740 return trueop;
79072805
LW		 2741 }
2742 else {
2743 op_free(first);
b1cb66bf 2744 op_free(trueop);
2745 return falseop;
79072805
LW		 2746 }
2747 }
2748 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2749 list(trueop);
2750 scalar(falseop);
79072805
LW		 2751 }
2752 Newz(1101, condop, 1, CONDOP);
2753
2754 condop->op_type = OP_COND_EXPR;
2755 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2756 condop->op_first = first;
2757 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2758 condop->op_true = LINKLIST(trueop);
2759 condop->op_false = LINKLIST(falseop);
c07a80fd 2760 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2761
2762 /* establish postfix order */
2763 condop->op_next = LINKLIST(first);
2764 first->op_next = (OP*)condop;
2765
b1cb66bf 2766 first->op_sibling = trueop;
2767 trueop->op_sibling = falseop;
11343788 2768 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2769
5dc0d613
MB		 2770 trueop->op_next = o;
2771 falseop->op_next = o;
79072805 2772
11343788 2773 return o;
79072805
LW		 2774}
2775
2776OP *
8ac85365 2777newRANGE(I32 flags, OP *left, OP *right)
79072805 2778{
b35b2403 2779 dTHR;
79072805
LW		 2780 CONDOP *condop;
2781 OP *flip;
2782 OP *flop;
11343788 2783 OP *o;
79072805
LW		 2784
2785 Newz(1101, condop, 1, CONDOP);
2786
2787 condop->op_type = OP_RANGE;
2788 condop->op_ppaddr = ppaddr[OP_RANGE];
2789 condop->op_first = left;
2790 condop->op_flags = OPf_KIDS;
2791 condop->op_true = LINKLIST(left);
2792 condop->op_false = LINKLIST(right);
c07a80fd 2793 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2794
2795 left->op_sibling = right;
2796
2797 condop->op_next = (OP*)condop;
2798 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2799 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2800 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2801 linklist(flop);
2802
2803 left->op_next = flip;
2804 right->op_next = flop;
2805
ed6116ce 2806 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2807 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2808 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2809 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2810
2811 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2812 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2813
11343788 2814 flip->op_next = o;
79072805 2815 if (!flip->op_private || !flop->op_private)
11343788 2816 linklist(o); /* blow off optimizer unless constant */
79072805 2817
11343788 2818 return o;
79072805
LW		 2819}
2820
2821OP *
8ac85365 2822newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2823{
11343788 2824 dTHR;
463ee0b2 2825 OP* listop;
11343788 2826 OP* o;
463ee0b2 2827 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2828 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2829
463ee0b2
LW		 2830 if (expr) {
2831 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2832 return block; /* do {} while 0 does once */
fb73857a 2833 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2834 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2835 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2836 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
774d564b 2837 }
463ee0b2 2838 }
93a17b20 2839
8990e307 2840 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
11343788 2841 o = newLOGOP(OP_AND, 0, expr, listop);
463ee0b2 2842
11343788 2843 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2844
11343788
MB		 2845 if (once && o != listop)
2846 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2847
11343788
MB		 2848 if (o == listop)
2849 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2850
11343788
MB		 2851 o->op_flags |= flags;
2852 o = scope(o);
2853 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2854 return o;
79072805
LW		 2855}
2856
2857OP *
8ac85365 2858newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2859{
11343788 2860 dTHR;
79072805
LW		 2861 OP *redo;
2862 OP *next = 0;
2863 OP *listop;
11343788 2864 OP *o;
79072805
LW		 2865 OP *condop;
2866
fb73857a 2867 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2868 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2869 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2870 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
748a9306 2871 }
79072805
LW		 2872
2873 if (!block)
2874 block = newOP(OP_NULL, 0);
2875
2876 if (cont)
2877 next = LINKLIST(cont);
fb73857a 2878 if (expr) {
79072805 2879 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2880 if ((line_t)whileline != NOLINE) {
2881 copline = whileline;
2882 cont = append_elem(OP_LINESEQ, cont,
2883 newSTATEOP(0, Nullch, Nullop));
2884 }
2885 }
79072805 2886
463ee0b2 2887 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2888 redo = LINKLIST(listop);
2889
2890 if (expr) {
11343788
MB		 2891 o = newLOGOP(OP_AND, 0, expr, scalar(listop));
2892 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2893 op_free(expr); /* oops, it's a while (0) */
463ee0b2
LW		 2894 op_free((OP*)loop);
2895 return Nullop; /* (listop already freed by newLOGOP) */
2896 }
aeea060c 2897 ((LISTOP*)listop)->op_last->op_next = condop =
11343788 2898 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2899 if (!next)
2900 next = condop;
2901 }
2902 else
11343788 2903 o = listop;
79072805
LW		 2904
2905 if (!loop) {
2906 Newz(1101,loop,1,LOOP);
2907 loop->op_type = OP_ENTERLOOP;
2908 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2909 loop->op_private = 0;
2910 loop->op_next = (OP*)loop;
2911 }
2912
11343788 2913 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 2914
2915 loop->op_redoop = redo;
11343788 2916 loop->op_lastop = o;
79072805
LW		 2917
2918 if (next)
2919 loop->op_nextop = next;
2920 else
11343788 2921 loop->op_nextop = o;
79072805 2922
11343788
MB		 2923 o->op_flags |= flags;
2924 o->op_private |= (flags >> 8);
2925 return o;
79072805
LW		 2926}
2927
2928OP *
a0d0e21e 2929#ifndef CAN_PROTOTYPE
79072805
LW		 2930newFOROP(flags,label,forline,sv,expr,block,cont)
2931I32 flags;
2932char *label;
2933line_t forline;
2934OP* sv;
2935OP* expr;
2936OP*block;
2937OP*cont;
8990e307
LW		 2938#else
2939newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
a0d0e21e 2940#endif /* CAN_PROTOTYPE */
79072805
LW		 2941{
2942 LOOP *loop;
fb73857a 2943 OP *wop;
85e6fe83 2944 int padoff = 0;
4633a7c4 2945 I32 iterflags = 0;
79072805 2946
79072805 2947 if (sv) {
85e6fe83 2948 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 2949 sv->op_type = OP_RV2GV;
2950 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 2951 }
85e6fe83
LW		 2952 else if (sv->op_type == OP_PADSV) { /* private variable */
2953 padoff = sv->op_targ;
2954 op_free(sv);
2955 sv = Nullop;
2956 }
54b9620d
MB		 2957 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
2958 padoff = sv->op_targ;
2959 iterflags |= OPf_SPECIAL;
2960 op_free(sv);
2961 sv = Nullop;
2962 }
79072805 2963 else
c07a80fd 2964 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 2965 }
2966 else {
54b9620d
MB		 2967#ifdef USE_THREADS
2968 padoff = find_threadsv("_");
2969 iterflags |= OPf_SPECIAL;
2970#else
79072805 2971 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 2972#endif
79072805 2973 }
5f05dabc 2974 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
4633a7c4
LW		 2975 expr = scalar(ref(expr, OP_ITER));
2976 iterflags |= OPf_STACKED;
2977 }
2978 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
a0d0e21e
LW		 2979 append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART),
2980 scalar(sv))));
85e6fe83
LW		 2981 assert(!loop->op_next);
2982 Renew(loop, 1, LOOP);
2983 loop->op_targ = padoff;
fb73857a 2984 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
2985 copline = forline;
2986 return newSTATEOP(0, label, wop);
79072805
LW		 2987}
2988
8990e307 2989OP*
8ac85365 2990newLOOPEX(I32 type, OP *label)
8990e307 2991{
11343788
MB		 2992 dTHR;
2993 OP *o;
8990e307 2994 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 2995 /* "last()" means "last" */
2996 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
2997 o = newOP(type, OPf_SPECIAL);
2998 else {
2999 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3000 ? SvPVx(((SVOP*)label)->op_sv, na)
3001 : ""));
3002 }
8990e307
LW		 3003 op_free(label);
3004 }
3005 else {
a0d0e21e
LW		 3006 if (label->op_type == OP_ENTERSUB)
3007 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3008 o = newUNOP(type, OPf_STACKED, label);
8990e307 3009 }
85e6fe83 3010 hints |= HINT_BLOCK_SCOPE;
11343788 3011 return o;
8990e307
LW		 3012}
3013
79072805 3014void
8ac85365 3015cv_undef(CV *cv)
79072805 3016{
11343788
MB		 3017 dTHR;
3018#ifdef USE_THREADS
e858de61
MB		 3019 if (CvMUTEXP(cv)) {
3020 MUTEX_DESTROY(CvMUTEXP(cv));
3021 Safefree(CvMUTEXP(cv));
3022 CvMUTEXP(cv) = 0;
3023 }
11343788
MB		 3024#endif /* USE_THREADS */
3025
a0d0e21e 3026 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3027#ifdef USE_THREADS
3028 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3029 croak("Can't undef active subroutine");
3030#else
a0d0e21e
LW		 3031 if (CvDEPTH(cv))
3032 croak("Can't undef active subroutine");
11343788 3033#endif /* USE_THREADS */
8990e307 3034 ENTER;
a0d0e21e
LW		 3035
3036 SAVESPTR(curpad);
3037 curpad = 0;
3038
a5f75d66 3039 if (!CvCLONED(cv))
748a9306 3040 op_free(CvROOT(cv));
79072805 3041 CvROOT(cv) = Nullop;
8990e307 3042 LEAVE;
79072805 3043 }
1d5db326 3044 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3045 CvFLAGS(cv) = 0;
8e07c86e
AD		 3046 SvREFCNT_dec(CvGV(cv));
3047 CvGV(cv) = Nullgv;
3048 SvREFCNT_dec(CvOUTSIDE(cv));
3049 CvOUTSIDE(cv) = Nullcv;
3050 if (CvPADLIST(cv)) {
8ebc5c01 3051 /* may be during global destruction */
3052 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3053 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3054 while (i >= 0) {
3055 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3056 SV* sv = svp ? *svp : Nullsv;
3057 if (!sv)
3058 continue;
3059 if (sv == (SV*)comppad_name)
3060 comppad_name = Nullav;
3061 else if (sv == (SV*)comppad) {
3062 comppad = Nullav;
3063 curpad = Null(SV**);
3064 }
3065 SvREFCNT_dec(sv);
8ebc5c01 3066 }
3067 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3068 }
8e07c86e
AD		 3069 CvPADLIST(cv) = Nullav;
3070 }
79072805
LW		 3071}
3072
5f05dabc 3073#ifdef DEBUG_CLOSURES
3074static void
3075cv_dump(cv)
3076CV* cv;
3077{
3078 CV *outside = CvOUTSIDE(cv);
3079 AV* padlist = CvPADLIST(cv);
4fdae800 3080 AV* pad_name;
3081 AV* pad;
3082 SV** pname;
3083 SV** ppad;
5f05dabc 3084 I32 ix;
3085
fb73857a 3086 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3087 cv,
3088 (CvANON(cv) ? "ANON"
3089 : (cv == main_cv) ? "MAIN"
07055b4c 3090 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3091 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3092 outside,
3093 (!outside ? "null"
3094 : CvANON(outside) ? "ANON"
3095 : (outside == main_cv) ? "MAIN"
07055b4c 3096 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3097 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3098
4fdae800 3099 if (!padlist)
3100 return;
3101
3102 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3103 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3104 pname = AvARRAY(pad_name);
3105 ppad = AvARRAY(pad);
3106
93965878 3107 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3108 if (SvPOK(pname[ix]))
fb73857a 3109 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3110 ix, ppad[ix],
3111 SvFAKE(pname[ix]) ? "FAKE " : "",
3112 SvPVX(pname[ix]),
ab50184a
CS		 3113 (long)I_32(SvNVX(pname[ix])),
3114 (long)SvIVX(pname[ix]));
5f05dabc 3115 }
3116}
3117#endif /* DEBUG_CLOSURES */
3118
3119static CV *
8ac85365 3120cv_clone2(CV *proto, CV *outside)
748a9306 3121{
11343788 3122 dTHR;
748a9306
LW		 3123 AV* av;
3124 I32 ix;
3125 AV* protopadlist = CvPADLIST(proto);
3126 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3127 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3128 SV** pname = AvARRAY(protopad_name);
3129 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3130 I32 fname = AvFILLp(protopad_name);
3131 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3132 AV* comppadlist;
3133 CV* cv;
3134
07055b4c
CS		 3135 assert(!CvUNIQUE(proto));
3136
748a9306
LW		 3137 ENTER;
3138 SAVESPTR(curpad);
3139 SAVESPTR(comppad);
46fc3d4c 3140 SAVESPTR(comppad_name);
748a9306
LW		 3141 SAVESPTR(compcv);
3142
3143 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3144 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3145 CvCLONED_on(cv);
5f05dabc 3146 if (CvANON(proto))
3147 CvANON_on(cv);
748a9306 3148
11343788 3149#ifdef USE_THREADS
12ca11f6 3150 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3151 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3152 CvOWNER(cv) = 0;
3153#endif /* USE_THREADS */
748a9306 3154 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3155 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3156 CvSTASH(cv) = CvSTASH(proto);
3157 CvROOT(cv) = CvROOT(proto);
3158 CvSTART(cv) = CvSTART(proto);
5f05dabc 3159 if (outside)
3160 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3161
68dc0745 3162 if (SvPOK(proto))
3163 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3164
46fc3d4c 3165 comppad_name = newAV();
3166 for (ix = fname; ix >= 0; ix--)
3167 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3168
3169 comppad = newAV();
3170
3171 comppadlist = newAV();
3172 AvREAL_off(comppadlist);
46fc3d4c 3173 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3174 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3175 CvPADLIST(cv) = comppadlist;
93965878 3176 av_fill(comppad, AvFILLp(protopad));
748a9306
LW		 3177 curpad = AvARRAY(comppad);
3178
3179 av = newAV(); /* will be @_ */
3180 av_extend(av, 0);
3181 av_store(comppad, 0, (SV*)av);
3182 AvFLAGS(av) = AVf_REIFY;
3183
9607fc9c 3184 for (ix = fpad; ix > 0; ix--) {
3185 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3186 if (namesv && namesv != &sv_undef) {
3187 char *name = SvPVX(namesv); /* XXX */
3188 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3189 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3190 CvOUTSIDE(cv), cxstack_ix);
3191 if (!off)
3192 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3193 else if (off != ix)
748a9306
LW		 3194 croak("panic: cv_clone: %s", name);
3195 }
3196 else { /* our own lexical */
aa689395 3197 SV* sv;
5f05dabc 3198 if (*name == '&') {
3199 /* anon code -- we'll come back for it */
3200 sv = SvREFCNT_inc(ppad[ix]);
3201 }
3202 else if (*name == '@')
3203 sv = (SV*)newAV();
748a9306 3204 else if (*name == '%')
5f05dabc 3205 sv = (SV*)newHV();
748a9306 3206 else
5f05dabc 3207 sv = NEWSV(0,0);
3208 if (!SvPADBUSY(sv))
3209 SvPADMY_on(sv);
3210 curpad[ix] = sv;
748a9306
LW		 3211 }
3212 }
3213 else {
aa689395 3214 SV* sv = NEWSV(0,0);
748a9306 3215 SvPADTMP_on(sv);
5f05dabc 3216 curpad[ix] = sv;
748a9306
LW		 3217 }
3218 }
3219
5f05dabc 3220 /* Now that vars are all in place, clone nested closures. */
3221
9607fc9c 3222 for (ix = fpad; ix > 0; ix--) {
3223 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3224 if (namesv
3225 && namesv != &sv_undef
3226 && !(SvFLAGS(namesv) & SVf_FAKE)
3227 && *SvPVX(namesv) == '&'
5f05dabc 3228 && CvCLONE(ppad[ix]))
3229 {
3230 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3231 SvREFCNT_dec(ppad[ix]);
3232 CvCLONE_on(kid);
3233 SvPADMY_on(kid);
3234 curpad[ix] = (SV*)kid;
748a9306
LW		 3235 }
3236 }
3237
5f05dabc 3238#ifdef DEBUG_CLOSURES
ab50184a
CS		 3239 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3240 cv_dump(outside);
3241 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3242 cv_dump(proto);
ab50184a 3243 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3244 cv_dump(cv);
3245#endif
3246
748a9306
LW		 3247 LEAVE;
3248 return cv;
3249}
3250
3251CV *
8ac85365 3252cv_clone(CV *proto)
5f05dabc 3253{
3254 return cv_clone2(proto, CvOUTSIDE(proto));
3255}
3256
3fe9a6f1 3257void
8ac85365 3258cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3259{
3260 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3261 SV* msg = sv_newmortal();
3fe9a6f1 3262 SV* name = Nullsv;
3263
3264 if (gv)
46fc3d4c 3265 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3266 sv_setpv(msg, "Prototype mismatch:");
3267 if (name)
fc36a67e 3268 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3269 if (SvPOK(cv))
46fc3d4c 3270 sv_catpvf(msg, " (%s)", SvPVX(cv));
3271 sv_catpv(msg, " vs ");
3272 if (p)
3273 sv_catpvf(msg, "(%s)", p);
3274 else
3275 sv_catpv(msg, "none");
fc36a67e 3276 warn("%_", msg);
3fe9a6f1 3277 }
3278}
3279
760ac839 3280SV *
8ac85365 3281cv_const_sv(CV *cv)
760ac839
LW		 3282{
3283 OP *o;
54310121 3284 SV *sv;
aeea060c 3285
54310121 3286 if (!cv || !SvPOK(cv) || SvCUR(cv))
3287 return Nullsv;
760ac839 3288
54310121 3289 sv = Nullsv;
3290 for (o = CvSTART(cv); o; o = o->op_next) {
3291 OPCODE type = o->op_type;
3292
3293 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3294 continue;
3295 if (type == OP_LEAVESUB || type == OP_RETURN)
3296 break;
3297 if (sv)
3298 return Nullsv;
3299 if (type == OP_CONST)
5dc0d613 3300 sv = cSVOPo->op_sv;
54310121 3301 else if (type == OP_PADSV) {
e858de61
MB		 3302 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3303 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3304 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3305 return Nullsv;
760ac839 3306 }
54310121 3307 else
3308 return Nullsv;
760ac839 3309 }
5aabfad6 3310 if (sv)
3311 SvREADONLY_on(sv);
760ac839
LW		 3312 return sv;
3313}
3314
748a9306 3315CV *
8ac85365 3316newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3317{
11343788 3318 dTHR;
5dc0d613 3319 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
44a8e56a 3320 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
3fe9a6f1 3321 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
79072805 3322 register CV *cv;
a0d0e21e 3323 I32 ix;
79072805 3324
11343788 3325 if (o)
5dc0d613 3326 SAVEFREEOP(o);
3fe9a6f1 3327 if (proto)
3328 SAVEFREEOP(proto);
3329
68dc0745 3330 if (!name || GvCVGEN(gv))
3331 cv = Nullcv;
3332 else if (cv = GvCV(gv)) {
3fe9a6f1 3333 cv_ckproto(cv, gv, ps);
68dc0745 3334 /* already defined (or promised)? */
3335 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3336 SV* const_sv;
aa689395 3337 if (!block) {
3338 /* just a "sub foo;" when &foo is already defined */
3339 SAVEFREESV(compcv);
3340 goto done;
3341 }
7bac28a0 3342 /* ahem, death to those who redefine active sort subs */
3343 if (curstack == sortstack && sortcop == CvSTART(cv))
3344 croak("Can't redefine active sort subroutine %s", name);
68dc0745 3345 const_sv = cv_const_sv(cv);
44a8e56a 3346 if (const_sv || dowarn) {
79072805 3347 line_t oldline = curcop->cop_line;
79072805 3348 curcop->cop_line = copline;
760ac839 3349 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3350 : "Subroutine %s redefined", name);
79072805
LW		 3351 curcop->cop_line = oldline;
3352 }
8990e307 3353 SvREFCNT_dec(cv);
68dc0745 3354 cv = Nullcv;
79072805
LW		 3355 }
3356 }
a0d0e21e 3357 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3358 cv_undef(cv);
44a8e56a 3359 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3360 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3361 CvOUTSIDE(compcv) = 0;
748a9306 3362 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3363 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3364 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3365 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3366 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3367 }
3368 else {
748a9306 3369 cv = compcv;
44a8e56a 3370 if (name) {
3371 GvCV(gv) = cv;
3372 GvCVGEN(gv) = 0;
3373 sub_generation++;
3374 }
a0d0e21e 3375 }
44a8e56a 3376 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3377 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3378 CvSTASH(cv) = curstash;
11343788
MB		 3379#ifdef USE_THREADS
3380 CvOWNER(cv) = 0;
12ca11f6 3381 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3382 MUTEX_INIT(CvMUTEXP(cv));
11343788 3383#endif /* USE_THREADS */
8990e307 3384
3fe9a6f1 3385 if (ps)
3386 sv_setpv((SV*)cv, ps);
4633a7c4 3387
c07a80fd 3388 if (error_count) {
3389 op_free(block);
3390 block = Nullop;
68dc0745 3391 if (name) {
3392 char *s = strrchr(name, ':');
3393 s = s ? s+1 : name;
6d4c2119
CS		 3394 if (strEQ(s, "BEGIN")) {
3395 char *not_safe =
3396 "BEGIN not safe after errors--compilation aborted";
3397 if (in_eval & 4)
3398 croak(not_safe);
3399 else {
3400 /* force display of errors found but not reported */
38a03e6e
MB		 3401 sv_catpv(ERRSV, not_safe);
3402 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3403 }
3404 }
68dc0745 3405 }
c07a80fd 3406 }
a0d0e21e 3407 if (!block) {
a0d0e21e
LW		 3408 copline = NOLINE;
3409 LEAVE_SCOPE(floor);
3410 return cv;
3411 }
3412
93965878
NIS		 3413 if (AvFILLp(comppad_name) < AvFILLp(comppad))
3414 av_store(comppad_name, AvFILLp(comppad), Nullsv);
a0d0e21e 3415
54310121 3416 if (CvCLONE(cv)) {
3417 SV **namep = AvARRAY(comppad_name);
93965878 3418 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3419 SV *namesv;
3420
3421 if (SvIMMORTAL(curpad[ix]))
3422 continue;
3423 /*
3424 * The only things that a clonable function needs in its
3425 * pad are references to outer lexicals and anonymous subs.
3426 * The rest are created anew during cloning.
3427 */
3428 if (!((namesv = namep[ix]) != Nullsv &&
3429 namesv != &sv_undef &&
3430 (SvFAKE(namesv) ||
3431 *SvPVX(namesv) == '&')))
3432 {
3433 SvREFCNT_dec(curpad[ix]);
3434 curpad[ix] = Nullsv;
3435 }
3436 }
a0d0e21e 3437 }
54310121 3438 else {
3439 AV *av = newAV(); /* Will be @_ */
3440 av_extend(av, 0);
3441 av_store(comppad, 0, (SV*)av);
3442 AvFLAGS(av) = AVf_REIFY;
79072805 3443
93965878 3444 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3445 if (SvIMMORTAL(curpad[ix]))
3446 continue;
3447 if (!SvPADMY(curpad[ix]))
3448 SvPADTMP_on(curpad[ix]);
3449 }
3450 }
79072805 3451
a0d0e21e 3452 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3453 CvSTART(cv) = LINKLIST(CvROOT(cv));
3454 CvROOT(cv)->op_next = 0;
3455 peep(CvSTART(cv));
93a17b20 3456
44a8e56a 3457 if (name) {
3458 char *s;
3459
84902520 3460 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3461 SV *sv = NEWSV(0,0);
44a8e56a 3462 SV *tmpstr = sv_newmortal();
549bb64a 3463 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3464 CV *cv;
3465 HV *hv;
3466
51790459
MB		 3467 sv_setpvf(sv, "%_:%ld-%ld",
3468 GvSV(curcop->cop_filegv),
3469 (long)subline, (long)curcop->cop_line);
44a8e56a 3470 gv_efullname3(tmpstr, gv, Nullch);
3471 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3472 hv = GvHVn(db_postponed);
9607fc9c 3473 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3474 && (cv = GvCV(db_postponed))) {
44a8e56a 3475 dSP;
3476 PUSHMARK(sp);
3477 XPUSHs(tmpstr);
3478 PUTBACK;
3479 perl_call_sv((SV*)cv, G_DISCARD);
3480 }
3481 }
79072805 3482
44a8e56a 3483 if ((s = strrchr(name,':')))
28757baa 3484 s++;
3485 else
3486 s = name;
68dc0745 3487 if (strEQ(s, "BEGIN")) {
2ae324a7 3488 I32 oldscope = scopestack_ix;
28757baa 3489 ENTER;
3490 SAVESPTR(compiling.cop_filegv);
3491 SAVEI16(compiling.cop_line);
3492 SAVEI32(perldb);
3493 save_svref(&rs);
3494 sv_setsv(rs, nrs);
3495
3496 if (!beginav)
3497 beginav = newAV();
3498 DEBUG_x( dump_sub(gv) );
3499 av_push(beginav, (SV *)cv);
3500 GvCV(gv) = 0;
68dc0745 3501 call_list(oldscope, beginav);
a6006777 3502
28757baa 3503 curcop = &compiling;
3504 LEAVE;
3505 }
3506 else if (strEQ(s, "END") && !error_count) {
3507 if (!endav)
3508 endav = newAV();
3509 av_unshift(endav, 1);
3510 av_store(endav, 0, (SV *)cv);
3511 GvCV(gv) = 0;
3512 }
7d07dbc2
MB		 3513 else if (strEQ(s, "INIT") && !error_count) {
3514 if (!initav)
3515 initav = newAV();
3516 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3517 }
79072805 3518 }
a6006777 3519
aa689395 3520 done:
79072805 3521 copline = NOLINE;
8990e307 3522 LEAVE_SCOPE(floor);
a0d0e21e 3523 return cv;
79072805
LW		 3524}
3525
57d3b86d 3526CV *
aeea060c 3527newXS(char *name, void (*subaddr) (CV *), char *filename)
a0d0e21e 3528{
11343788 3529 dTHR;
44a8e56a 3530 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3531 register CV *cv;
44a8e56a 3532
3533 if (cv = (name ? GvCV(gv) : Nullcv)) {
3534 if (GvCVGEN(gv)) {
3535 /* just a cached method */
3536 SvREFCNT_dec(cv);
3537 cv = 0;
3538 }
3539 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3540 /* already defined (or promised) */
a0d0e21e
LW		 3541 if (dowarn) {
3542 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3543 curcop->cop_line = copline;
3544 warn("Subroutine %s redefined",name);
3545 curcop->cop_line = oldline;
3546 }
3547 SvREFCNT_dec(cv);
3548 cv = 0;
79072805 3549 }
79072805 3550 }
44a8e56a 3551
3552 if (cv) /* must reuse cv if autoloaded */
3553 cv_undef(cv);
a0d0e21e
LW		 3554 else {
3555 cv = (CV*)NEWSV(1105,0);
3556 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3557 if (name) {
3558 GvCV(gv) = cv;
3559 GvCVGEN(gv) = 0;
3560 sub_generation++;
3561 }
a0d0e21e 3562 }
5196be3e 3563 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3564#ifdef USE_THREADS
12ca11f6 3565 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3566 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3567 CvOWNER(cv) = 0;
3568#endif /* USE_THREADS */
79072805 3569 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3570 CvXSUB(cv) = subaddr;
44a8e56a 3571
28757baa 3572 if (name) {
3573 char *s = strrchr(name,':');
3574 if (s)
3575 s++;
3576 else
3577 s = name;
3578 if (strEQ(s, "BEGIN")) {
3579 if (!beginav)
3580 beginav = newAV();
44a8e56a 3581 av_push(beginav, (SV *)cv);
3582 GvCV(gv) = 0;
28757baa 3583 }
3584 else if (strEQ(s, "END")) {
3585 if (!endav)
3586 endav = newAV();
3587 av_unshift(endav, 1);
44a8e56a 3588 av_store(endav, 0, (SV *)cv);
3589 GvCV(gv) = 0;
28757baa 3590 }
7d07dbc2
MB		 3591 else if (strEQ(s, "INIT")) {
3592 if (!initav)
3593 initav = newAV();
3594 av_push(initav, (SV *)cv);
ae77835f 3595 }
28757baa 3596 }
8990e307 3597 else
a5f75d66 3598 CvANON_on(cv);
44a8e56a 3599
a0d0e21e 3600 return cv;
79072805
LW		 3601}
3602
3603void
8ac85365 3604newFORM(I32 floor, OP *o, OP *block)
79072805 3605{
11343788 3606 dTHR;
79072805
LW		 3607 register CV *cv;
3608 char *name;
3609 GV *gv;
a0d0e21e 3610 I32 ix;
79072805 3611
11343788
MB		 3612 if (o)
3613 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3614 else
3615 name = "STDOUT";
85e6fe83 3616 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3617 GvMULTI_on(gv);
79072805
LW		 3618 if (cv = GvFORM(gv)) {
3619 if (dowarn) {
3620 line_t oldline = curcop->cop_line;
3621
3622 curcop->cop_line = copline;
3623 warn("Format %s redefined",name);
3624 curcop->cop_line = oldline;
3625 }
8990e307 3626 SvREFCNT_dec(cv);
79072805 3627 }
748a9306 3628 cv = compcv;
79072805 3629 GvFORM(gv) = cv;
44a8e56a 3630 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3631 CvFILEGV(cv) = curcop->cop_filegv;
3632
93965878 3633 for (ix = AvFILLp(comppad); ix > 0; ix--) {
44a8e56a 3634 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3635 SvPADTMP_on(curpad[ix]);
3636 }
3637
79072805
LW		 3638 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3639 CvSTART(cv) = LINKLIST(CvROOT(cv));
3640 CvROOT(cv)->op_next = 0;
3641 peep(CvSTART(cv));
11343788 3642 op_free(o);
79072805 3643 copline = NOLINE;
8990e307 3644 LEAVE_SCOPE(floor);
79072805
LW		 3645}
3646
3647OP *
8ac85365 3648newANONLIST(OP *o)
79072805 3649{
93a17b20 3650 return newUNOP(OP_REFGEN, 0,
11343788 3651 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3652}
3653
3654OP *
8ac85365 3655newANONHASH(OP *o)
79072805 3656{
93a17b20 3657 return newUNOP(OP_REFGEN, 0,
11343788 3658 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3659}
3660
3661OP *
8ac85365 3662newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3663{
3664 return newUNOP(OP_REFGEN, 0,
4633a7c4 3665 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3666}
3667
3668OP *
8ac85365 3669oopsAV(OP *o)
79072805 3670{
ed6116ce
LW		 3671 switch (o->op_type) {
3672 case OP_PADSV:
3673 o->op_type = OP_PADAV;
3674 o->op_ppaddr = ppaddr[OP_PADAV];
3675 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3676
3677 case OP_RV2SV:
79072805
LW		 3678 o->op_type = OP_RV2AV;
3679 o->op_ppaddr = ppaddr[OP_RV2AV];
3680 ref(o, OP_RV2AV);
ed6116ce
LW		 3681 break;
3682
3683 default:
79072805 3684 warn("oops: oopsAV");
ed6116ce
LW		 3685 break;
3686 }
79072805
LW		 3687 return o;
3688}
3689
3690OP *
8ac85365 3691oopsHV(OP *o)
79072805 3692{
ed6116ce
LW		 3693 switch (o->op_type) {
3694 case OP_PADSV:
3695 case OP_PADAV:
3696 o->op_type = OP_PADHV;
3697 o->op_ppaddr = ppaddr[OP_PADHV];
3698 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3699
3700 case OP_RV2SV:
3701 case OP_RV2AV:
79072805
LW		 3702 o->op_type = OP_RV2HV;
3703 o->op_ppaddr = ppaddr[OP_RV2HV];
3704 ref(o, OP_RV2HV);
ed6116ce
LW		 3705 break;
3706
3707 default:
79072805 3708 warn("oops: oopsHV");
ed6116ce
LW		 3709 break;
3710 }
79072805
LW		 3711 return o;
3712}
3713
3714OP *
8ac85365 3715newAVREF(OP *o)
79072805 3716{
ed6116ce
LW		 3717 if (o->op_type == OP_PADANY) {
3718 o->op_type = OP_PADAV;
3719 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3720 return o;
ed6116ce 3721 }
79072805
LW		 3722 return newUNOP(OP_RV2AV, 0, scalar(o));
3723}
3724
3725OP *
8ac85365 3726newGVREF(I32 type, OP *o)
79072805 3727{
a0d0e21e
LW		 3728 if (type == OP_MAPSTART)
3729 return newUNOP(OP_NULL, 0, o);
748a9306 3730 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3731}
3732
3733OP *
8ac85365 3734newHVREF(OP *o)
79072805 3735{
ed6116ce
LW		 3736 if (o->op_type == OP_PADANY) {
3737 o->op_type = OP_PADHV;
3738 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3739 return o;
ed6116ce 3740 }
79072805
LW		 3741 return newUNOP(OP_RV2HV, 0, scalar(o));
3742}
3743
3744OP *
8ac85365 3745oopsCV(OP *o)
79072805 3746{
463ee0b2 3747 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3748 /* STUB */
3749 return o;
3750}
3751
3752OP *
8ac85365 3753newCVREF(I32 flags, OP *o)
79072805 3754{
c07a80fd 3755 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3756}
3757
3758OP *
8ac85365 3759newSVREF(OP *o)
79072805 3760{
ed6116ce
LW		 3761 if (o->op_type == OP_PADANY) {
3762 o->op_type = OP_PADSV;
3763 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3764 return o;
ed6116ce 3765 }
224a4551
MB		 3766 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
3767 o->op_flags |= OPpDONE_SVREF;
a863c7d1 3768 return o;
224a4551 3769 }
79072805
LW		 3770 return newUNOP(OP_RV2SV, 0, scalar(o));
3771}
3772
3773/* Check routines. */
3774
3775OP *
8ac85365 3776ck_anoncode(OP *o)
5f05dabc 3777{
178c6305
CS		 3778 PADOFFSET ix;
3779 SV* name;
3780
3781 name = NEWSV(1106,0);
3782 sv_upgrade(name, SVt_PVNV);
3783 sv_setpvn(name, "&", 1);
3784 SvIVX(name) = -1;
3785 SvNVX(name) = 1;
5dc0d613 3786 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3787 av_store(comppad_name, ix, name);
5dc0d613
MB		 3788 av_store(comppad, ix, cSVOPo->op_sv);
3789 SvPADMY_on(cSVOPo->op_sv);
3790 cSVOPo->op_sv = Nullsv;
3791 cSVOPo->op_targ = ix;
3792 return o;
5f05dabc 3793}
3794
3795OP *
8ac85365 3796ck_bitop(OP *o)
55497cff 3797{
5dc0d613
MB		 3798 o->op_private = hints;
3799 return o;
55497cff 3800}
3801
3802OP *
8ac85365 3803ck_concat(OP *o)
79072805 3804{
11343788
MB		 3805 if (cUNOPo->op_first->op_type == OP_CONCAT)
3806 o->op_flags |= OPf_STACKED;
3807 return o;
79072805
LW		 3808}
3809
3810OP *
8ac85365 3811ck_spair(OP *o)
79072805 3812{
11343788 3813 if (o->op_flags & OPf_KIDS) {
79072805 3814 OP* newop;
a0d0e21e 3815 OP* kid;
5dc0d613
MB		 3816 OPCODE type = o->op_type;
3817 o = modkids(ck_fun(o), type);
11343788 3818 kid = cUNOPo->op_first;
a0d0e21e
LW		 3819 newop = kUNOP->op_first->op_sibling;
3820 if (newop &&
3821 (newop->op_sibling ||
3822 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3823 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3824 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3825
11343788 3826 return o;
a0d0e21e
LW		 3827 }
3828 op_free(kUNOP->op_first);
3829 kUNOP->op_first = newop;
3830 }
11343788
MB		 3831 o->op_ppaddr = ppaddr[++o->op_type];
3832 return ck_fun(o);
a0d0e21e
LW		 3833}
3834
3835OP *
8ac85365 3836ck_delete(OP *o)
a0d0e21e 3837{
11343788 3838 o = ck_fun(o);
5dc0d613 3839 o->op_private = 0;
11343788
MB		 3840 if (o->op_flags & OPf_KIDS) {
3841 OP *kid = cUNOPo->op_first;
5f05dabc 3842 if (kid->op_type == OP_HSLICE)
5dc0d613 3843 o->op_private |= OPpSLICE;
5f05dabc 3844 else if (kid->op_type != OP_HELEM)
3845 croak("%s argument is not a HASH element or slice",
5dc0d613 3846 op_desc[o->op_type]);
a0d0e21e 3847 null(kid);
79072805 3848 }
11343788 3849 return o;
79072805
LW		 3850}
3851
3852OP *
8ac85365 3853ck_eof(OP *o)
79072805 3854{
11343788 3855 I32 type = o->op_type;
79072805 3856
11343788
MB		 3857 if (o->op_flags & OPf_KIDS) {
3858 if (cLISTOPo->op_first->op_type == OP_STUB) {
3859 op_free(o);
3860 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 3861 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 3862 }
11343788 3863 return ck_fun(o);
79072805 3864 }
11343788 3865 return o;
79072805
LW		 3866}
3867
3868OP *
8ac85365 3869ck_eval(OP *o)
79072805 3870{
85e6fe83 3871 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 3872 if (o->op_flags & OPf_KIDS) {
3873 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 3874
93a17b20 3875 if (!kid) {
11343788
MB		 3876 o->op_flags &= ~OPf_KIDS;
3877 null(o);
79072805
LW		 3878 }
3879 else if (kid->op_type == OP_LINESEQ) {
3880 LOGOP *enter;
3881
11343788
MB		 3882 kid->op_next = o->op_next;
3883 cUNOPo->op_first = 0;
3884 op_free(o);
79072805
LW		 3885
3886 Newz(1101, enter, 1, LOGOP);
3887 enter->op_type = OP_ENTERTRY;
3888 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
3889 enter->op_private = 0;
3890
3891 /* establish postfix order */
3892 enter->op_next = (OP*)enter;
3893
11343788
MB		 3894 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
3895 o->op_type = OP_LEAVETRY;
3896 o->op_ppaddr = ppaddr[OP_LEAVETRY];
3897 enter->op_other = o;
3898 return o;
79072805 3899 }
c7cc6f1c 3900 else
473986ff 3901 scalar((OP*)kid);
79072805
LW		 3902 }
3903 else {
11343788 3904 op_free(o);
54b9620d 3905 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 3906 }
11343788
MB		 3907 o->op_targ = (PADOFFSET)hints;
3908 return o;
79072805
LW		 3909}
3910
3911OP *
8ac85365 3912ck_exec(OP *o)
79072805
LW		 3913{
3914 OP *kid;
11343788
MB		 3915 if (o->op_flags & OPf_STACKED) {
3916 o = ck_fun(o);
3917 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 3918 if (kid->op_type == OP_RV2GV)
3919 null(kid);
79072805 3920 }
463ee0b2 3921 else
11343788
MB		 3922 o = listkids(o);
3923 return o;
79072805
LW		 3924}
3925
3926OP *
8ac85365 3927ck_exists(OP *o)
5f05dabc 3928{
5196be3e
MB		 3929 o = ck_fun(o);
3930 if (o->op_flags & OPf_KIDS) {
3931 OP *kid = cUNOPo->op_first;
5f05dabc 3932 if (kid->op_type != OP_HELEM)
5196be3e 3933 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 3934 null(kid);
3935 }
5196be3e 3936 return o;
5f05dabc 3937}
3938
3939OP *
8ac85365 3940ck_gvconst(register OP *o)
79072805
LW		 3941{
3942 o = fold_constants(o);
3943 if (o->op_type == OP_CONST)
3944 o->op_type = OP_GV;
3945 return o;
3946}
3947
3948OP *
8ac85365 3949ck_rvconst(register OP *o)
79072805 3950{
11343788
MB		 3951 dTHR;
3952 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 3953
11343788 3954 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 3955 if (kid->op_type == OP_CONST) {
44a8e56a 3956 char *name;
3957 int iscv;
3958 GV *gv;
3959
3960 name = SvPV(kid->op_sv, na);
3961 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
3962 char *badthing = Nullch;
5dc0d613 3963 switch (o->op_type) {
44a8e56a 3964 case OP_RV2SV:
3965 badthing = "a SCALAR";
3966 break;
3967 case OP_RV2AV:
3968 badthing = "an ARRAY";
3969 break;
3970 case OP_RV2HV:
3971 badthing = "a HASH";
3972 break;
3973 }
3974 if (badthing)
3975 croak(
3976 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
3977 name, badthing);
3978 }
79072805 3979 kid->op_type = OP_GV;
5196be3e 3980 iscv = (o->op_type == OP_RV2CV) * 2;
a0d0e21e 3981 for (gv = 0; !gv; iscv++) {
748a9306
LW		 3982 /*
3983 * This is a little tricky. We only want to add the symbol if we
3984 * didn't add it in the lexer. Otherwise we get duplicate strict
3985 * warnings. But if we didn't add it in the lexer, we must at
3986 * least pretend like we wanted to add it even if it existed before,
3987 * or we get possible typo warnings. OPpCONST_ENTERED says
3988 * whether the lexer already added THIS instance of this symbol.
3989 */
44a8e56a 3990 gv = gv_fetchpv(name,
748a9306 3991 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 3992 iscv
3993 ? SVt_PVCV
11343788 3994 : o->op_type == OP_RV2SV
a0d0e21e 3995 ? SVt_PV
11343788 3996 : o->op_type == OP_RV2AV
a0d0e21e 3997 ? SVt_PVAV
11343788 3998 : o->op_type == OP_RV2HV
a0d0e21e
LW		 3999 ? SVt_PVHV
4000 : SVt_PVGV);
4001 }
adbc6bb1 4002 SvREFCNT_dec(kid->op_sv);
a0d0e21e 4003 kid->op_sv = SvREFCNT_inc(gv);
79072805 4004 }
11343788 4005 return o;
79072805
LW		 4006}
4007
4008OP *
8ac85365 4009ck_ftst(OP *o)
79072805 4010{
11343788
MB		 4011 dTHR;
4012 I32 type = o->op_type;
79072805 4013
11343788
MB		 4014 if (o->op_flags & OPf_REF)
4015 return o;
79072805 4016
11343788
MB		 4017 if (o->op_flags & OPf_KIDS) {
4018 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4019
4020 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4021 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 4022 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 4023 op_free(o);
79072805
LW		 4024 return newop;
4025 }
4026 }
4027 else {
11343788 4028 op_free(o);
79072805 4029 if (type == OP_FTTTY)
fb73857a 4030 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4031 SVt_PVIO));
79072805 4032 else
54b9620d 4033 return newUNOP(type, 0, newDEFSVOP());
79072805 4034 }
11343788 4035 return o;
79072805
LW		 4036}
4037
4038OP *
8ac85365 4039ck_fun(OP *o)
79072805 4040{
11343788 4041 dTHR;
79072805
LW		 4042 register OP *kid;
4043 OP **tokid;
4044 OP *sibl;
4045 I32 numargs = 0;
11343788 4046 int type = o->op_type;
a0d0e21e 4047 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4048
11343788 4049 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4050 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4051 oa &= ~OA_OPTIONAL;
4052 else
11343788 4053 return no_fh_allowed(o);
79072805
LW		 4054 }
4055
11343788
MB		 4056 if (o->op_flags & OPf_KIDS) {
4057 tokid = &cLISTOPo->op_first;
4058 kid = cLISTOPo->op_first;
8990e307
LW		 4059 if (kid->op_type == OP_PUSHMARK ||
4060 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4061 {
79072805
LW		 4062 tokid = &kid->op_sibling;
4063 kid = kid->op_sibling;
4064 }
a0d0e21e 4065 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4066 *tokid = kid = newDEFSVOP();
79072805
LW		 4067
4068 while (oa && kid) {
4069 numargs++;
4070 sibl = kid->op_sibling;
4071 switch (oa & 7) {
4072 case OA_SCALAR:
4073 scalar(kid);
4074 break;
4075 case OA_LIST:
4076 if (oa < 16) {
4077 kid = 0;
4078 continue;
4079 }
4080 else
4081 list(kid);
4082 break;
4083 case OA_AVREF:
4084 if (kid->op_type == OP_CONST &&
4085 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4086 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4087 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4088 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4089 if (dowarn)
ff0cee69 4090 warn("Array @%s missing the @ in argument %ld of %s()",
4091 name, (long)numargs, op_desc[type]);
79072805
LW		 4092 op_free(kid);
4093 kid = newop;
4094 kid->op_sibling = sibl;
4095 *tokid = kid;
4096 }
8990e307 4097 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4098 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4099 mod(kid, type);
79072805
LW		 4100 break;
4101 case OA_HVREF:
4102 if (kid->op_type == OP_CONST &&
4103 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4104 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4105 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4106 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4107 if (dowarn)
ff0cee69 4108 warn("Hash %%%s missing the %% in argument %ld of %s()",
4109 name, (long)numargs, op_desc[type]);
79072805
LW		 4110 op_free(kid);
4111 kid = newop;
4112 kid->op_sibling = sibl;
4113 *tokid = kid;
4114 }
8990e307 4115 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4116 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4117 mod(kid, type);
79072805
LW		 4118 break;
4119 case OA_CVREF:
4120 {
a0d0e21e 4121 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4122 kid->op_sibling = 0;
4123 linklist(kid);
4124 newop->op_next = newop;
4125 kid = newop;
4126 kid->op_sibling = sibl;
4127 *tokid = kid;
4128 }
4129 break;
4130 case OA_FILEREF:
4131 if (kid->op_type != OP_GV) {
4132 if (kid->op_type == OP_CONST &&
4133 (kid->op_private & OPpCONST_BARE)) {
4134 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4135 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4136 SVt_PVIO) );
79072805
LW		 4137 op_free(kid);
4138 kid = newop;
4139 }
4140 else {
4141 kid->op_sibling = 0;
4142 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4143 }
4144 kid->op_sibling = sibl;
4145 *tokid = kid;
4146 }
4147 scalar(kid);
4148 break;
4149 case OA_SCALARREF:
a0d0e21e 4150 mod(scalar(kid), type);
79072805
LW		 4151 break;
4152 }
4153 oa >>= 4;
4154 tokid = &kid->op_sibling;
4155 kid = kid->op_sibling;
4156 }
11343788 4157 o->op_private |= numargs;
79072805 4158 if (kid)
11343788
MB		 4159 return too_many_arguments(o,op_desc[o->op_type]);
4160 listkids(o);
79072805 4161 }
a0d0e21e 4162 else if (opargs[type] & OA_DEFGV) {
11343788 4163 op_free(o);
54b9620d 4164 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4165 }
4166
79072805
LW		 4167 if (oa) {
4168 while (oa & OA_OPTIONAL)
4169 oa >>= 4;
4170 if (oa && oa != OA_LIST)
11343788 4171 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4172 }
11343788 4173 return o;
79072805
LW		 4174}
4175
4176OP *
8ac85365 4177ck_glob(OP *o)
79072805 4178{
fb73857a 4179 GV *gv;
4180
1f2bfc8a 4181 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4182 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4183
4184 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4185 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4186
4187 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4188 static int glob_index;
4189
5196be3e 4190 append_elem(OP_GLOB, o,
46fc3d4c 4191 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4192 o->op_type = OP_LIST;
4193 o->op_ppaddr = ppaddr[OP_LIST];
4194 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4195 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4196 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4197 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4198 scalar(newUNOP(OP_RV2CV, 0,
4199 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4200 o = newUNOP(OP_NULL, 0, ck_subr(o));
4201 o->op_targ = OP_GLOB; /* hint at what it used to be */
4202 return o;
b1cb66bf 4203 }
4204 gv = newGVgen("main");
a0d0e21e 4205 gv_IOadd(gv);
11343788
MB		 4206 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4207 scalarkids(o);
4208 return ck_fun(o);
79072805
LW		 4209}
4210
4211OP *
8ac85365 4212ck_grep(OP *o)
79072805
LW		 4213{
4214 LOGOP *gwop;
4215 OP *kid;
11343788 4216 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4217
11343788 4218 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4219 Newz(1101, gwop, 1, LOGOP);
aeea060c 4220
11343788 4221 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4222 OP* k;
11343788
MB		 4223 o = ck_sort(o);
4224 kid = cLISTOPo->op_first->op_sibling;
4225 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4226 kid = k;
4227 }
4228 kid->op_next = (OP*)gwop;
11343788 4229 o->op_flags &= ~OPf_STACKED;
93a17b20 4230 }
11343788 4231 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4232 if (type == OP_MAPWHILE)
4233 list(kid);
4234 else
4235 scalar(kid);
11343788 4236 o = ck_fun(o);
79072805 4237 if (error_count)
11343788 4238 return o;
aeea060c 4239 kid = cLISTOPo->op_first->op_sibling;
79072805 4240 if (kid->op_type != OP_NULL)
463ee0b2 4241 croak("panic: ck_grep");
79072805
LW		 4242 kid = kUNOP->op_first;
4243
a0d0e21e
LW		 4244 gwop->op_type = type;
4245 gwop->op_ppaddr = ppaddr[type];
11343788 4246 gwop->op_first = listkids(o);
79072805
LW		 4247 gwop->op_flags |= OPf_KIDS;
4248 gwop->op_private = 1;
4249 gwop->op_other = LINKLIST(kid);
a0d0e21e 4250 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4251 kid->op_next = (OP*)gwop;
4252
11343788 4253 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4254 if (!kid || !kid->op_sibling)
11343788 4255 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4256 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4257 mod(kid, OP_GREPSTART);
4258
79072805
LW		 4259 return (OP*)gwop;
4260}
4261
4262OP *
8ac85365 4263ck_index(OP *o)
79072805 4264{
11343788
MB		 4265 if (o->op_flags & OPf_KIDS) {
4266 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4267 if (kid && kid->op_type == OP_CONST)
bbce6d69 4268 fbm_compile(((SVOP*)kid)->op_sv);
79072805 4269 }
11343788 4270 return ck_fun(o);
79072805
LW		 4271}
4272
4273OP *
8ac85365 4274ck_lengthconst(OP *o)
79072805
LW		 4275{
4276 /* XXX length optimization goes here */
11343788 4277 return ck_fun(o);
79072805
LW		 4278}
4279
4280OP *
8ac85365 4281ck_lfun(OP *o)
79072805 4282{
5dc0d613
MB		 4283 OPCODE type = o->op_type;
4284 return modkids(ck_fun(o), type);
79072805
LW		 4285}
4286
4287OP *
8ac85365 4288ck_rfun(OP *o)
8990e307 4289{
5dc0d613
MB		 4290 OPCODE type = o->op_type;
4291 return refkids(ck_fun(o), type);
8990e307
LW		 4292}
4293
4294OP *
8ac85365 4295ck_listiob(OP *o)
79072805
LW		 4296{
4297 register OP *kid;
aeea060c 4298
11343788 4299 kid = cLISTOPo->op_first;
79072805 4300 if (!kid) {
11343788
MB		 4301 o = force_list(o);
4302 kid = cLISTOPo->op_first;
79072805
LW		 4303 }
4304 if (kid->op_type == OP_PUSHMARK)
4305 kid = kid->op_sibling;
11343788 4306 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4307 kid = kid->op_sibling;
4308 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4309 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4310 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4311 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4312 cLISTOPo->op_first->op_sibling = kid;
4313 cLISTOPo->op_last = kid;
79072805
LW		 4314 kid = kid->op_sibling;
4315 }
4316 }
4317
4318 if (!kid)
54b9620d 4319 append_elem(o->op_type, o, newDEFSVOP());
79072805 4320
5dc0d613 4321 o = listkids(o);
bbce6d69 4322
5dc0d613 4323 o->op_private = 0;
36477c24 4324#ifdef USE_LOCALE
bbce6d69 4325 if (hints & HINT_LOCALE)
5dc0d613 4326 o->op_private |= OPpLOCALE;
bbce6d69 4327#endif
4328
5dc0d613 4329 return o;
bbce6d69 4330}
4331
4332OP *
8ac85365 4333ck_fun_locale(OP *o)
bbce6d69 4334{
5dc0d613 4335 o = ck_fun(o);
bbce6d69 4336
5dc0d613 4337 o->op_private = 0;
36477c24 4338#ifdef USE_LOCALE
bbce6d69 4339 if (hints & HINT_LOCALE)
5dc0d613 4340 o->op_private |= OPpLOCALE;
bbce6d69 4341#endif
4342
5dc0d613 4343 return o;
bbce6d69 4344}
4345
4346OP *
8ac85365 4347ck_scmp(OP *o)
bbce6d69 4348{
5dc0d613 4349 o->op_private = 0;
36477c24 4350#ifdef USE_LOCALE
bbce6d69 4351 if (hints & HINT_LOCALE)
5dc0d613 4352 o->op_private |= OPpLOCALE;
bbce6d69 4353#endif
36477c24 4354
5dc0d613 4355 return o;
79072805
LW		 4356}
4357
4358OP *
8ac85365 4359ck_match(OP *o)
79072805 4360{
5dc0d613 4361 o->op_private |= OPpRUNTIME;
11343788 4362 return o;
79072805
LW		 4363}
4364
4365OP *
8ac85365 4366ck_null(OP *o)
79072805 4367{
11343788 4368 return o;
79072805
LW		 4369}
4370
4371OP *
8ac85365 4372ck_repeat(OP *o)
79072805 4373{
11343788
MB		 4374 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4375 o->op_private |= OPpREPEAT_DOLIST;
4376 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4377 }
4378 else
11343788
MB		 4379 scalar(o);
4380 return o;
79072805
LW		 4381}
4382
4383OP *
8ac85365 4384ck_require(OP *o)
8990e307 4385{
11343788
MB		 4386 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4387 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4388
4389 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4390 char *s;
a0d0e21e
LW		 4391 for (s = SvPVX(kid->op_sv); *s; s++) {
4392 if (*s == ':' && s[1] == ':') {
4393 *s = '/';
1aef975c 4394 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4395 --SvCUR(kid->op_sv);
4396 }
8990e307 4397 }
a0d0e21e 4398 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4399 }
4400 }
11343788 4401 return ck_fun(o);
8990e307
LW		 4402}
4403
4404OP *
8ac85365 4405ck_retarget(OP *o)
79072805 4406{
463ee0b2 4407 croak("NOT IMPL LINE %d",__LINE__);
79072805 4408 /* STUB */
11343788 4409 return o;
79072805
LW		 4410}
4411
4412OP *
8ac85365 4413ck_select(OP *o)
79072805 4414{
c07a80fd 4415 OP* kid;
11343788
MB		 4416 if (o->op_flags & OPf_KIDS) {
4417 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4418 if (kid && kid->op_sibling) {
11343788
MB		 4419 o->op_type = OP_SSELECT;
4420 o->op_ppaddr = ppaddr[OP_SSELECT];
4421 o = ck_fun(o);
4422 return fold_constants(o);
79072805
LW		 4423 }
4424 }
11343788
MB		 4425 o = ck_fun(o);
4426 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4427 if (kid && kid->op_type == OP_RV2GV)
4428 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4429 return o;
79072805
LW		 4430}
4431
4432OP *
8ac85365 4433ck_shift(OP *o)
79072805 4434{
11343788 4435 I32 type = o->op_type;
79072805 4436
11343788 4437 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4438 OP *argop;
4439
11343788 4440 op_free(o);
6d4ff0d2 4441#ifdef USE_THREADS
977336f5 4442 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4443 argop = newOP(OP_PADAV, OPf_REF);
4444 argop->op_targ = 0; /* curpad[0] is @_ */
4445 }
4446 else {
4447 argop = newUNOP(OP_RV2AV, 0,
4448 scalar(newGVOP(OP_GV, 0,
4449 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4450 }
4451#else
4452 argop = newUNOP(OP_RV2AV, 0,
977336f5 4453 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4454 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4455#endif /* USE_THREADS */
4456 return newUNOP(type, 0, scalar(argop));
79072805 4457 }
11343788 4458 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4459}
4460
4461OP *
8ac85365 4462ck_sort(OP *o)
79072805 4463{
5dc0d613 4464 o->op_private = 0;
36477c24 4465#ifdef USE_LOCALE
bbce6d69 4466 if (hints & HINT_LOCALE)
5dc0d613 4467 o->op_private |= OPpLOCALE;
bbce6d69 4468#endif
4469
11343788
MB		 4470 if (o->op_flags & OPf_STACKED) {
4471 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4472 OP *k;
4473 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4474
463ee0b2 4475 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4476 linklist(kid);
463ee0b2
LW		 4477 if (kid->op_type == OP_SCOPE) {
4478 k = kid->op_next;
4479 kid->op_next = 0;
79072805 4480 }
463ee0b2 4481 else if (kid->op_type == OP_LEAVE) {
11343788 4482 if (o->op_type == OP_SORT) {
748a9306
LW		 4483 null(kid); /* wipe out leave */
4484 kid->op_next = kid;
463ee0b2 4485
748a9306
LW		 4486 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4487 if (k->op_next == kid)
4488 k->op_next = 0;
4489 }
463ee0b2 4490 }
748a9306
LW		 4491 else
4492 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4493 k = kLISTOP->op_first;
463ee0b2 4494 }
a0d0e21e
LW		 4495 peep(k);
4496
11343788 4497 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4498 null(kid); /* wipe out rv2gv */
11343788 4499 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4500 kid->op_next = kid;
4501 else
4502 kid->op_next = k;
11343788 4503 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4504 }
4505 }
bbce6d69 4506
11343788 4507 return o;
79072805
LW		 4508}
4509
4510OP *
8ac85365 4511ck_split(OP *o)
79072805
LW		 4512{
4513 register OP *kid;
aeea060c 4514
11343788
MB		 4515 if (o->op_flags & OPf_STACKED)
4516 return no_fh_allowed(o);
79072805 4517
11343788 4518 kid = cLISTOPo->op_first;
8990e307 4519 if (kid->op_type != OP_NULL)
463ee0b2 4520 croak("panic: ck_split");
8990e307 4521 kid = kid->op_sibling;
11343788
MB		 4522 op_free(cLISTOPo->op_first);
4523 cLISTOPo->op_first = kid;
85e6fe83 4524 if (!kid) {
11343788
MB		 4525 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4526 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4527 }
79072805
LW		 4528
4529 if (kid->op_type != OP_MATCH) {
4530 OP *sibl = kid->op_sibling;
463ee0b2 4531 kid->op_sibling = 0;
79072805 4532 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4533 if (cLISTOPo->op_first == cLISTOPo->op_last)
4534 cLISTOPo->op_last = kid;
4535 cLISTOPo->op_first = kid;
79072805
LW		 4536 kid->op_sibling = sibl;
4537 }
4538
4539 kid->op_type = OP_PUSHRE;
4540 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4541 scalar(kid);
4542
4543 if (!kid->op_sibling)
54b9620d 4544 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4545
4546 kid = kid->op_sibling;
4547 scalar(kid);
4548
4549 if (!kid->op_sibling)
11343788 4550 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4551
4552 kid = kid->op_sibling;
4553 scalar(kid);
4554
4555 if (kid->op_sibling)
11343788 4556 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4557
11343788 4558 return o;
79072805
LW		 4559}
4560
4561OP *
8ac85365 4562ck_subr(OP *o)
79072805 4563{
11343788
MB		 4564 dTHR;
4565 OP *prev = ((cUNOPo->op_first->op_sibling)
4566 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4567 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4568 OP *cvop;
4569 char *proto = 0;
4570 CV *cv = 0;
46fc3d4c 4571 GV *namegv = 0;
4633a7c4
LW		 4572 int optional = 0;
4573 I32 arg = 0;
4574
11343788 4575 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4576 if (cvop->op_type == OP_RV2CV) {
4577 SVOP* tmpop;
11343788 4578 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4579 null(cvop); /* disable rv2cv */
4580 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4581 if (tmpop->op_type == OP_GV) {
8ebc5c01 4582 cv = GvCVu(tmpop->op_sv);
5dc0d613 4583 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4584 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4585 proto = SvPV((SV*)cv, na);
4586 }
4633a7c4
LW		 4587 }
4588 }
11343788 4589 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4590 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4591 o->op_private |= OPpENTERSUB_DB;
4592 while (o2 != cvop) {
4633a7c4
LW		 4593 if (proto) {
4594 switch (*proto) {
4595 case '\0':
5dc0d613 4596 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4597 case ';':
4598 optional = 1;
4599 proto++;
4600 continue;
4601 case '$':
4602 proto++;
4603 arg++;
11343788 4604 scalar(o2);
4633a7c4
LW		 4605 break;
4606 case '%':
4607 case '@':
11343788 4608 list(o2);
4633a7c4
LW		 4609 arg++;
4610 break;
4611 case '&':
4612 proto++;
4613 arg++;
11343788 4614 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4615 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4616 break;
4617 case '*':
4618 proto++;
4619 arg++;
11343788 4620 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4621 goto wrapref;
4622 {
11343788 4623 OP* kid = o2;
69dcf70c 4624 OP* sib = kid->op_sibling;
4633a7c4 4625 kid->op_sibling = 0;
69dcf70c
MB		 4626 o2 = newUNOP(OP_RV2GV, 0, kid);
4627 o2->op_sibling = sib;
6fa846a0 4628 prev->op_sibling = o2;
4633a7c4
LW		 4629 }
4630 goto wrapref;
4631 case '\\':
4632 proto++;
4633 arg++;
4634 switch (*proto++) {
4635 case '*':
11343788 4636 if (o2->op_type != OP_RV2GV)
5dc0d613 4637 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4638 goto wrapref;
4639 case '&':
11343788 4640 if (o2->op_type != OP_RV2CV)
5dc0d613 4641 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4642 goto wrapref;
4643 case '$':
11343788 4644 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4645 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4646 goto wrapref;
4647 case '@':
11343788 4648 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4649 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4650 goto wrapref;
4651 case '%':
11343788 4652 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4653 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4654 wrapref:
4655 {
11343788 4656 OP* kid = o2;
6fa846a0 4657 OP* sib = kid->op_sibling;
4633a7c4 4658 kid->op_sibling = 0;
6fa846a0
GS		 4659 o2 = newUNOP(OP_REFGEN, 0, kid);
4660 o2->op_sibling = sib;
e858de61 4661 prev->op_sibling = o2;
4633a7c4
LW		 4662 }
4663 break;
4664 default: goto oops;
4665 }
4666 break;
b1cb66bf 4667 case ' ':
4668 proto++;
4669 continue;
4633a7c4
LW		 4670 default:
4671 oops:
4672 croak("Malformed prototype for %s: %s",
46fc3d4c 4673 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4674 }
4675 }
4676 else
11343788
MB		 4677 list(o2);
4678 mod(o2, OP_ENTERSUB);
4679 prev = o2;
4680 o2 = o2->op_sibling;
4633a7c4 4681 }
fb73857a 4682 if (proto && !optional &&
4683 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4684 return too_few_arguments(o, gv_ename(namegv));
11343788 4685 return o;
79072805
LW		 4686}
4687
4688OP *
8ac85365 4689ck_svconst(OP *o)
8990e307 4690{
11343788
MB		 4691 SvREADONLY_on(cSVOPo->op_sv);
4692 return o;
8990e307
LW		 4693}
4694
4695OP *
8ac85365 4696ck_trunc(OP *o)
79072805 4697{
11343788
MB		 4698 if (o->op_flags & OPf_KIDS) {
4699 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4700
a0d0e21e
LW		 4701 if (kid->op_type == OP_NULL)
4702 kid = (SVOP*)kid->op_sibling;
4703 if (kid &&
4704 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4705 o->op_flags |= OPf_SPECIAL;
79072805 4706 }
11343788 4707 return ck_fun(o);
79072805
LW		 4708}
4709
463ee0b2
LW		 4710/* A peephole optimizer. We visit the ops in the order they're to execute. */
4711
79072805 4712void
8ac85365 4713peep(register OP *o)
79072805 4714{
11343788 4715 dTHR;
79072805 4716 register OP* oldop = 0;
a0d0e21e 4717 if (!o || o->op_seq)
79072805 4718 return;
a0d0e21e 4719 ENTER;
462e5cf6 4720 SAVEOP();
a0d0e21e
LW		 4721 SAVESPTR(curcop);
4722 for (; o; o = o->op_next) {
4723 if (o->op_seq)
4724 break;
c07a80fd 4725 if (!op_seqmax)
4726 op_seqmax++;
a0d0e21e
LW		 4727 op = o;
4728 switch (o->op_type) {
4729 case OP_NEXTSTATE:
4730 case OP_DBSTATE:
4731 curcop = ((COP*)o); /* for warnings */
c07a80fd 4732 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4733 break;
4734
4735 case OP_CONCAT:
4736 case OP_CONST:
4737 case OP_JOIN:
4738 case OP_UC:
4739 case OP_UCFIRST:
4740 case OP_LC:
4741 case OP_LCFIRST:
4742 case OP_QUOTEMETA:
3c4f770c 4743 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4744 null(o->op_next);
c07a80fd 4745 o->op_seq = op_seqmax++;
a0d0e21e 4746 break;
8990e307 4747 case OP_STUB:
54310121 4748 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4749 o->op_seq = op_seqmax++;
54310121 4750 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4751 }
748a9306 4752 goto nothin;
79072805 4753 case OP_NULL:
748a9306
LW		 4754 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
4755 curcop = ((COP*)op);
4756 goto nothin;
79072805 4757 case OP_SCALAR:
93a17b20 4758 case OP_LINESEQ:
463ee0b2 4759 case OP_SCOPE:
748a9306 4760 nothin:
a0d0e21e
LW		 4761 if (oldop && o->op_next) {
4762 oldop->op_next = o->op_next;
79072805
LW		 4763 continue;
4764 }
c07a80fd 4765 o->op_seq = op_seqmax++;
79072805
LW		 4766 break;
4767
4768 case OP_GV:
a0d0e21e 4769 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4770 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4771 null(o->op_next);
4772 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4773 o->op_next = o->op_next->op_next;
4774 o->op_type = OP_GVSV;
4775 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4776 }
4777 }
a0d0e21e
LW		 4778 else if (o->op_next->op_type == OP_RV2AV) {
4779 OP* pop = o->op_next->op_next;
4780 IV i;
8990e307 4781 if (pop->op_type == OP_CONST &&
e858de61 4782 (op = pop->op_next) &&
8990e307 4783 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4784 !(pop->op_next->op_private &
68dc0745 4785 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4786 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4787 <= 255 &&
8990e307
LW		 4788 i >= 0)
4789 {
748a9306 4790 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4791 null(o->op_next);
8990e307
LW		 4792 null(pop->op_next);
4793 null(pop);
a0d0e21e
LW		 4794 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4795 o->op_next = pop->op_next->op_next;
4796 o->op_type = OP_AELEMFAST;
4797 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4798 o->op_private = (U8)i;
a6006777 4799 GvAVn(((GVOP*)o)->op_gv);
8990e307 4800 }
79072805 4801 }
c07a80fd 4802 o->op_seq = op_seqmax++;
79072805
LW		 4803 break;
4804
af41f3ca
MB		 4805 case OP_PADAV:
4806 if (o->op_next->op_type == OP_RV2AV
4807 && (o->op_next->op_flags && OPf_REF))
4808 {
4809 null(o->op_next);
4810 o->op_next = o->op_next->op_next;
4811 }
4812 break;
aeea060c 4813
af41f3ca
MB		 4814 case OP_PADHV:
4815 if (o->op_next->op_type == OP_RV2HV
4816 && (o->op_next->op_flags && OPf_REF))
4817 {
4818 null(o->op_next);
4819 o->op_next = o->op_next->op_next;
4820 }
4821 break;
4822
a0d0e21e 4823 case OP_MAPWHILE:
79072805
LW		 4824 case OP_GREPWHILE:
4825 case OP_AND:
4826 case OP_OR:
c07a80fd 4827 o->op_seq = op_seqmax++;
79072805
LW		 4828 peep(cLOGOP->op_other);
4829 break;
4830
4831 case OP_COND_EXPR:
c07a80fd 4832 o->op_seq = op_seqmax++;
79072805
LW		 4833 peep(cCONDOP->op_true);
4834 peep(cCONDOP->op_false);
4835 break;
4836
4837 case OP_ENTERLOOP:
c07a80fd 4838 o->op_seq = op_seqmax++;
79072805
LW		 4839 peep(cLOOP->op_redoop);
4840 peep(cLOOP->op_nextop);
4841 peep(cLOOP->op_lastop);
4842 break;
4843
4844 case OP_MATCH:
4845 case OP_SUBST:
c07a80fd 4846 o->op_seq = op_seqmax++;
a0d0e21e 4847 peep(cPMOP->op_pmreplstart);
79072805
LW		 4848 break;
4849
a0d0e21e 4850 case OP_EXEC:
c07a80fd 4851 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4852 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
4853 if (o->op_next->op_sibling &&
4854 o->op_next->op_sibling->op_type != OP_DIE) {
4855 line_t oldline = curcop->cop_line;
4856
4857 curcop->cop_line = ((COP*)o->op_next)->cop_line;
4858 warn("Statement unlikely to be reached");
4859 warn("(Maybe you meant system() when you said exec()?)\n");
4860 curcop->cop_line = oldline;
4861 }
4862 }
4863 break;
aeea060c 4864
c750a3ec
MB		 4865 case OP_HELEM: {
4866 UNOP *rop;
4867 SV *lexname;
4868 GV **fields;
4869 SV **svp, **indsvp;
4870 I32 ind;
4871 char *key;
4872 STRLEN keylen;
aeea060c 4873
c750a3ec
MB		 4874 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
4875 || ((BINOP*)o)->op_last->op_type != OP_CONST)
4876 break;
4877 rop = (UNOP*)((BINOP*)o)->op_first;
4878 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
4879 break;
4880 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
4881 if (!SvOBJECT(lexname))
4882 break;
5196be3e 4883 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 4884 if (!fields || !GvHV(*fields))
4885 break;
4886 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
4887 key = SvPV(*svp, keylen);
4888 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
4889 if (!indsvp) {
4890 croak("No such field \"%s\" in variable %s of type %s",
4891 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
4892 }
4893 ind = SvIV(*indsvp);
4894 if (ind < 1)
4895 croak("Bad index while coercing array into hash");
4896 rop->op_type = OP_RV2AV;
4897 rop->op_ppaddr = ppaddr[OP_RV2AV];
4898 o->op_type = OP_AELEM;
4899 o->op_ppaddr = ppaddr[OP_AELEM];
4900 SvREFCNT_dec(*svp);
4901 *svp = newSViv(ind);
4902 break;
4903 }
4904
79072805 4905 default:
c07a80fd 4906 o->op_seq = op_seqmax++;
79072805
LW		 4907 break;
4908 }
a0d0e21e 4909 oldop = o;
79072805 4910 }
a0d0e21e 4911 LEAVE;
79072805 4912}
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