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[perl5.git] / op.c
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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 }
fb73857a 111 if (dowarn && AvFILL(comppad_name) >= 0) {
b1cb66bf 112 SV **svp = AvARRAY(comppad_name);
113 for (off = AvFILL(comppad_name); off > comppad_name_floor; off--) {
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);
179 for (off = AvFILL(curname); off > 0; off--) {
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. */
4633a7c4 310 for (off = AvFILL(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. */
348 for (off = AvFILL(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
LW		 366 do {
367 sv = *av_fetch(comppad, AvFILL(comppad) + 1, TRUE);
ed6116ce 368 } while (SvPADBUSY(sv)); /* need a fresh one */
79072805
LW		 369 retval = AvFILL(comppad);
370 }
371 else {
bbce6d69 372 SV **names = AvARRAY(comppad_name);
373 SSize_t names_fill = AvFILL(comppad_name);
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
5dc0d613
MB		 396 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad alloc %ld for %s\n",
397 (long) retval, op_name[optype]));
11343788 398#endif /* USE_THREADS */
79072805
LW		 399 return (PADOFFSET)retval;
400}
401
402SV *
a0d0e21e 403#ifndef CAN_PROTOTYPE
79072805
LW		 404pad_sv(po)
405PADOFFSET po;
8990e307
LW		 406#else
407pad_sv(PADOFFSET po)
a0d0e21e 408#endif /* CAN_PROTOTYPE */
79072805 409{
11343788
MB		 410 dTHR;
411#ifdef USE_THREADS
5dc0d613
MB		 412 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
413 (unsigned long) thr, (unsigned long) curpad, po));
11343788 414#else
79072805 415 if (!po)
463ee0b2 416 croak("panic: pad_sv po");
5dc0d613 417 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad sv %d\n", po));
11343788 418#endif /* USE_THREADS */
79072805
LW		 419 return curpad[po]; /* eventually we'll turn this into a macro */
420}
421
422void
a0d0e21e 423#ifndef CAN_PROTOTYPE
79072805
LW		 424pad_free(po)
425PADOFFSET po;
8990e307
LW		 426#else
427pad_free(PADOFFSET po)
a0d0e21e 428#endif /* CAN_PROTOTYPE */
79072805 429{
11343788 430 dTHR;
a0d0e21e
LW		 431 if (!curpad)
432 return;
79072805 433 if (AvARRAY(comppad) != curpad)
463ee0b2 434 croak("panic: pad_free curpad");
79072805 435 if (!po)
463ee0b2 436 croak("panic: pad_free po");
11343788 437#ifdef USE_THREADS
5dc0d613
MB		 438 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
439 (unsigned long) thr, (unsigned long) curpad, po));
11343788 440#else
5dc0d613 441 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad free %d\n", po));
11343788 442#endif /* USE_THREADS */
a0d0e21e 443 if (curpad[po] && curpad[po] != &sv_undef)
ed6116ce 444 SvPADTMP_off(curpad[po]);
a0d0e21e 445 if ((I32)po < padix)
79072805
LW		 446 padix = po - 1;
447}
448
449void
a0d0e21e 450#ifndef CAN_PROTOTYPE
79072805
LW		 451pad_swipe(po)
452PADOFFSET po;
8990e307
LW		 453#else
454pad_swipe(PADOFFSET po)
a0d0e21e 455#endif /* CAN_PROTOTYPE */
79072805 456{
11343788 457 dTHR;
79072805 458 if (AvARRAY(comppad) != curpad)
463ee0b2 459 croak("panic: pad_swipe curpad");
79072805 460 if (!po)
463ee0b2 461 croak("panic: pad_swipe po");
11343788 462#ifdef USE_THREADS
5dc0d613
MB		 463 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
464 (unsigned long) thr, (unsigned long) curpad, po));
11343788 465#else
5dc0d613 466 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad swipe %d\n", po));
11343788 467#endif /* USE_THREADS */
ed6116ce 468 SvPADTMP_off(curpad[po]);
a0d0e21e
LW		 469 curpad[po] = NEWSV(1107,0);
470 SvPADTMP_on(curpad[po]);
471 if ((I32)po < padix)
79072805
LW		 472 padix = po - 1;
473}
474
475void
8ac85365 476pad_reset(void)
79072805 477{
11343788 478 dTHR;
79072805
LW		 479 register I32 po;
480
481 if (AvARRAY(comppad) != curpad)
463ee0b2 482 croak("panic: pad_reset curpad");
11343788 483#ifdef USE_THREADS
5dc0d613
MB		 484 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
485 (unsigned long) thr, (unsigned long) curpad));
11343788 486#else
760ac839 487 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad reset\n"));
11343788 488#endif /* USE_THREADS */
748a9306
LW		 489 if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */
490 for (po = AvMAX(comppad); po > padix_floor; po--) {
ff0cee69 491 if (curpad[po] && !SvIMMORTAL(curpad[po]))
748a9306
LW		 492 SvPADTMP_off(curpad[po]);
493 }
494 padix = padix_floor;
79072805 495 }
a0d0e21e 496 pad_reset_pending = FALSE;
79072805
LW		 497}
498
a863c7d1 499#ifdef USE_THREADS
54b9620d 500/* find_threadsv is not reentrant */
a863c7d1 501PADOFFSET
54b9620d 502find_threadsv(char *name)
a863c7d1
MB		 503{
504 dTHR;
505 char *p;
506 PADOFFSET key;
554b3eca 507 SV **svp;
54b9620d
MB		 508 /* We currently only handle names of a single character */
509 p = strchr(threadsv_names, *name);
a863c7d1
MB		 510 if (!p)
511 return NOT_IN_PAD;
54b9620d
MB		 512 key = p - threadsv_names;
513 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 514 if (!svp) {
515 SV *sv = NEWSV(0, 0);
54b9620d 516 av_store(thr->threadsv, key, sv);
554b3eca
MB		 517 /*
518 * Some magic variables used to be automagically initialised
519 * in gv_fetchpv. Those which are now per-thread magicals get
520 * initialised here instead.
521 */
522 switch (*name) {
54b9620d
MB		 523 case '_':
524 break;
554b3eca
MB		 525 case ';':
526 sv_setpv(sv, "\034");
54b9620d 527 sv_magic(sv, 0, 0, name, 1);
554b3eca 528 break;
c277df42
IZ		 529 case '&':
530 case '`':
531 case '\'':
532 sawampersand = TRUE;
533 SvREADONLY_on(sv);
54b9620d 534 sv_magic(sv, 0, 0, name, 1);
c277df42 535 break;
54b9620d
MB		 536 default:
537 sv_magic(sv, 0, 0, name, 1);
554b3eca 538 }
a863c7d1 539 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
54b9620d 540 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 541 sv, (*name < 32) ? "^" : "",
542 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 543 }
544 return key;
545}
546#endif /* USE_THREADS */
547
79072805
LW		 548/* Destructor */
549
550void
8ac85365 551op_free(OP *o)
79072805 552{
85e6fe83 553 register OP *kid, *nextkid;
79072805 554
5dc0d613 555 if (!o || o->op_seq == (U16)-1)
79072805
LW		 556 return;
557
11343788
MB		 558 if (o->op_flags & OPf_KIDS) {
559 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 560 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 561 op_free(kid);
85e6fe83 562 }
79072805
LW		 563 }
564
11343788 565 switch (o->op_type) {
8990e307 566 case OP_NULL:
11343788 567 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 568 break;
a0d0e21e 569 case OP_ENTEREVAL:
11343788 570 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 571 break;
554b3eca 572#ifdef USE_THREADS
2faa37cc 573 case OP_THREADSV:
54b9620d 574 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 575 break;
576#endif /* USE_THREADS */
a6006777 577 default:
5196be3e 578 if (!(o->op_flags & OPf_REF) || (check[o->op_type] != ck_ftst))
a6006777 579 break;
580 /* FALL THROUGH */
463ee0b2 581 case OP_GVSV:
79072805 582 case OP_GV:
a6006777 583 case OP_AELEMFAST:
11343788 584 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 585 break;
586 case OP_NEXTSTATE:
587 case OP_DBSTATE:
5196be3e 588 Safefree(cCOPo->cop_label);
11343788 589 SvREFCNT_dec(cCOPo->cop_filegv);
79072805
LW		 590 break;
591 case OP_CONST:
11343788 592 SvREFCNT_dec(cSVOPo->op_sv);
79072805 593 break;
748a9306
LW		 594 case OP_GOTO:
595 case OP_NEXT:
596 case OP_LAST:
597 case OP_REDO:
11343788 598 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 599 break;
600 /* FALL THROUGH */
a0d0e21e 601 case OP_TRANS:
11343788 602 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 603 break;
604 case OP_SUBST:
11343788 605 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 606 /* FALL THROUGH */
748a9306 607 case OP_PUSHRE:
a0d0e21e 608 case OP_MATCH:
c277df42 609 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 610 break;
79072805
LW		 611 }
612
11343788
MB		 613 if (o->op_targ > 0)
614 pad_free(o->op_targ);
8990e307 615
11343788 616 Safefree(o);
79072805
LW		 617}
618
8990e307 619static void
8ac85365 620null(OP *o)
8990e307 621{
54b9620d 622 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 623 pad_free(o->op_targ);
624 o->op_targ = o->op_type;
625 o->op_type = OP_NULL;
626 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 627}
628
79072805
LW		 629/* Contextualizers */
630
463ee0b2 631#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 632
633OP *
8ac85365 634linklist(OP *o)
79072805
LW		 635{
636 register OP *kid;
637
11343788
MB		 638 if (o->op_next)
639 return o->op_next;
79072805
LW		 640
641 /* establish postfix order */
11343788
MB		 642 if (cUNOPo->op_first) {
643 o->op_next = LINKLIST(cUNOPo->op_first);
644 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 645 if (kid->op_sibling)
646 kid->op_next = LINKLIST(kid->op_sibling);
647 else
11343788 648 kid->op_next = o;
79072805
LW		 649 }
650 }
651 else
11343788 652 o->op_next = o;
79072805 653
11343788 654 return o->op_next;
79072805
LW		 655}
656
657OP *
8ac85365 658scalarkids(OP *o)
79072805
LW		 659{
660 OP *kid;
11343788
MB		 661 if (o && o->op_flags & OPf_KIDS) {
662 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 663 scalar(kid);
664 }
11343788 665 return o;
79072805
LW		 666}
667
a0d0e21e 668static OP *
8ac85365 669scalarboolean(OP *o)
8990e307
LW		 670{
671 if (dowarn &&
11343788 672 o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 673 dTHR;
a0d0e21e
LW		 674 line_t oldline = curcop->cop_line;
675
676 if (copline != NOLINE)
677 curcop->cop_line = copline;
678 warn("Found = in conditional, should be ==");
679 curcop->cop_line = oldline;
680 }
11343788 681 return scalar(o);
8990e307
LW		 682}
683
684OP *
8ac85365 685scalar(OP *o)
79072805
LW		 686{
687 OP *kid;
688
a0d0e21e 689 /* assumes no premature commitment */
5dc0d613
MB		 690 if (!o || (o->op_flags & OPf_WANT) || error_count
691 || o->op_type == OP_RETURN)
11343788 692 return o;
79072805 693
5dc0d613 694 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 695
11343788 696 switch (o->op_type) {
79072805 697 case OP_REPEAT:
11343788
MB		 698 if (o->op_private & OPpREPEAT_DOLIST)
699 null(((LISTOP*)cBINOPo->op_first)->op_first);
700 scalar(cBINOPo->op_first);
8990e307 701 break;
79072805
LW		 702 case OP_OR:
703 case OP_AND:
704 case OP_COND_EXPR:
11343788 705 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 706 scalar(kid);
79072805 707 break;
a0d0e21e 708 case OP_SPLIT:
11343788 709 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 710 if (!kPMOP->op_pmreplroot)
711 deprecate("implicit split to @_");
712 }
713 /* FALL THROUGH */
79072805
LW		 714 case OP_MATCH:
715 case OP_SUBST:
716 case OP_NULL:
8990e307 717 default:
11343788
MB		 718 if (o->op_flags & OPf_KIDS) {
719 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 720 scalar(kid);
721 }
79072805
LW		 722 break;
723 case OP_LEAVE:
724 case OP_LEAVETRY:
5dc0d613 725 kid = cLISTOPo->op_first;
54310121 726 scalar(kid);
727 while (kid = kid->op_sibling) {
728 if (kid->op_sibling)
729 scalarvoid(kid);
730 else
731 scalar(kid);
732 }
0f15f207 733 WITH_THR(curcop = &compiling);
54310121 734 break;
748a9306 735 case OP_SCOPE:
79072805 736 case OP_LINESEQ:
8990e307 737 case OP_LIST:
11343788 738 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 739 if (kid->op_sibling)
740 scalarvoid(kid);
741 else
742 scalar(kid);
743 }
0f15f207 744 WITH_THR(curcop = &compiling);
79072805
LW		 745 break;
746 }
11343788 747 return o;
79072805
LW		 748}
749
750OP *
8ac85365 751scalarvoid(OP *o)
79072805
LW		 752{
753 OP *kid;
8990e307
LW		 754 char* useless = 0;
755 SV* sv;
79072805 756
54310121 757 /* assumes no premature commitment */
5dc0d613
MB		 758 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count
759 || o->op_type == OP_RETURN)
11343788 760 return o;
79072805 761
5dc0d613 762 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 763
11343788 764 switch (o->op_type) {
79072805 765 default:
11343788 766 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 767 break;
36477c24 768 /* FALL THROUGH */
769 case OP_REPEAT:
11343788 770 if (o->op_flags & OPf_STACKED)
8990e307
LW		 771 break;
772 /* FALL THROUGH */
773 case OP_GVSV:
774 case OP_WANTARRAY:
775 case OP_GV:
776 case OP_PADSV:
777 case OP_PADAV:
778 case OP_PADHV:
779 case OP_PADANY:
780 case OP_AV2ARYLEN:
8990e307 781 case OP_REF:
a0d0e21e
LW		 782 case OP_REFGEN:
783 case OP_SREFGEN:
8990e307
LW		 784 case OP_DEFINED:
785 case OP_HEX:
786 case OP_OCT:
787 case OP_LENGTH:
788 case OP_SUBSTR:
789 case OP_VEC:
790 case OP_INDEX:
791 case OP_RINDEX:
792 case OP_SPRINTF:
793 case OP_AELEM:
794 case OP_AELEMFAST:
795 case OP_ASLICE:
8990e307
LW		 796 case OP_HELEM:
797 case OP_HSLICE:
798 case OP_UNPACK:
799 case OP_PACK:
8990e307
LW		 800 case OP_JOIN:
801 case OP_LSLICE:
802 case OP_ANONLIST:
803 case OP_ANONHASH:
804 case OP_SORT:
805 case OP_REVERSE:
806 case OP_RANGE:
807 case OP_FLIP:
808 case OP_FLOP:
809 case OP_CALLER:
810 case OP_FILENO:
811 case OP_EOF:
812 case OP_TELL:
813 case OP_GETSOCKNAME:
814 case OP_GETPEERNAME:
815 case OP_READLINK:
816 case OP_TELLDIR:
817 case OP_GETPPID:
818 case OP_GETPGRP:
819 case OP_GETPRIORITY:
820 case OP_TIME:
821 case OP_TMS:
822 case OP_LOCALTIME:
823 case OP_GMTIME:
824 case OP_GHBYNAME:
825 case OP_GHBYADDR:
826 case OP_GHOSTENT:
827 case OP_GNBYNAME:
828 case OP_GNBYADDR:
829 case OP_GNETENT:
830 case OP_GPBYNAME:
831 case OP_GPBYNUMBER:
832 case OP_GPROTOENT:
833 case OP_GSBYNAME:
834 case OP_GSBYPORT:
835 case OP_GSERVENT:
836 case OP_GPWNAM:
837 case OP_GPWUID:
838 case OP_GGRNAM:
839 case OP_GGRGID:
840 case OP_GETLOGIN:
11343788
MB		 841 if (!(o->op_private & OPpLVAL_INTRO))
842 useless = op_desc[o->op_type];
8990e307
LW		 843 break;
844
845 case OP_RV2GV:
846 case OP_RV2SV:
847 case OP_RV2AV:
848 case OP_RV2HV:
11343788
MB		 849 if (!(o->op_private & OPpLVAL_INTRO) &&
850 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 851 useless = "a variable";
852 break;
79072805 853
93a17b20 854 case OP_NEXTSTATE:
8990e307 855 case OP_DBSTATE:
0f15f207 856 WITH_THR(curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 857 break;
858
79072805 859 case OP_CONST:
11343788 860 sv = cSVOPo->op_sv;
8990e307
LW		 861 if (dowarn) {
862 useless = "a constant";
863 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
864 useless = 0;
865 else if (SvPOK(sv)) {
866 if (strnEQ(SvPVX(sv), "di", 2) ||
a0d0e21e 867 strnEQ(SvPVX(sv), "ds", 2) ||
8990e307
LW		 868 strnEQ(SvPVX(sv), "ig", 2))
869 useless = 0;
870 }
871 }
11343788 872 null(o); /* don't execute a constant */
8990e307 873 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 874 break;
875
876 case OP_POSTINC:
11343788
MB		 877 o->op_type = OP_PREINC; /* pre-increment is faster */
878 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 879 break;
880
881 case OP_POSTDEC:
11343788
MB		 882 o->op_type = OP_PREDEC; /* pre-decrement is faster */
883 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 884 break;
885
79072805
LW		 886 case OP_OR:
887 case OP_AND:
888 case OP_COND_EXPR:
11343788 889 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 890 scalarvoid(kid);
891 break;
5aabfad6 892
a0d0e21e 893 case OP_NULL:
11343788 894 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
0f15f207 895 WITH_THR(curcop = ((COP*)o)); /* for warning below */
11343788 896 if (o->op_flags & OPf_STACKED)
a0d0e21e 897 break;
5aabfad6 898 /* FALL THROUGH */
79072805
LW		 899 case OP_ENTERTRY:
900 case OP_ENTER:
901 case OP_SCALAR:
11343788 902 if (!(o->op_flags & OPf_KIDS))
79072805 903 break;
54310121 904 /* FALL THROUGH */
463ee0b2 905 case OP_SCOPE:
79072805
LW		 906 case OP_LEAVE:
907 case OP_LEAVETRY:
a0d0e21e 908 case OP_LEAVELOOP:
79072805 909 case OP_LINESEQ:
79072805 910 case OP_LIST:
11343788 911 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 912 scalarvoid(kid);
913 break;
c90c0ff4 914 case OP_ENTEREVAL:
5196be3e 915 scalarkids(o);
c90c0ff4 916 break;
5aabfad6 917 case OP_REQUIRE:
c90c0ff4 918 /* all requires must return a boolean value */
5196be3e
MB		 919 o->op_flags &= ~OPf_WANT;
920 return scalar(o);
a0d0e21e 921 case OP_SPLIT:
11343788 922 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 923 if (!kPMOP->op_pmreplroot)
924 deprecate("implicit split to @_");
925 }
926 break;
79072805 927 }
8990e307
LW		 928 if (useless && dowarn)
929 warn("Useless use of %s in void context", useless);
11343788 930 return o;
79072805
LW		 931}
932
933OP *
8ac85365 934listkids(OP *o)
79072805
LW		 935{
936 OP *kid;
11343788
MB		 937 if (o && o->op_flags & OPf_KIDS) {
938 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 939 list(kid);
940 }
11343788 941 return o;
79072805
LW		 942}
943
944OP *
8ac85365 945list(OP *o)
79072805
LW		 946{
947 OP *kid;
948
a0d0e21e 949 /* assumes no premature commitment */
5dc0d613
MB		 950 if (!o || (o->op_flags & OPf_WANT) || error_count
951 || o->op_type == OP_RETURN)
11343788 952 return o;
79072805 953
5dc0d613 954 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 955
11343788 956 switch (o->op_type) {
79072805
LW		 957 case OP_FLOP:
958 case OP_REPEAT:
11343788 959 list(cBINOPo->op_first);
79072805
LW		 960 break;
961 case OP_OR:
962 case OP_AND:
963 case OP_COND_EXPR:
11343788 964 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 965 list(kid);
966 break;
967 default:
968 case OP_MATCH:
969 case OP_SUBST:
970 case OP_NULL:
11343788 971 if (!(o->op_flags & OPf_KIDS))
79072805 972 break;
11343788
MB		 973 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
974 list(cBINOPo->op_first);
975 return gen_constant_list(o);
79072805
LW		 976 }
977 case OP_LIST:
11343788 978 listkids(o);
79072805
LW		 979 break;
980 case OP_LEAVE:
981 case OP_LEAVETRY:
5dc0d613 982 kid = cLISTOPo->op_first;
54310121 983 list(kid);
984 while (kid = kid->op_sibling) {
985 if (kid->op_sibling)
986 scalarvoid(kid);
987 else
988 list(kid);
989 }
0f15f207 990 WITH_THR(curcop = &compiling);
54310121 991 break;
748a9306 992 case OP_SCOPE:
79072805 993 case OP_LINESEQ:
11343788 994 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 995 if (kid->op_sibling)
996 scalarvoid(kid);
997 else
998 list(kid);
999 }
0f15f207 1000 WITH_THR(curcop = &compiling);
79072805 1001 break;
c90c0ff4 1002 case OP_REQUIRE:
1003 /* all requires must return a boolean value */
5196be3e
MB		 1004 o->op_flags &= ~OPf_WANT;
1005 return scalar(o);
79072805 1006 }
11343788 1007 return o;
79072805
LW		 1008}
1009
1010OP *
8ac85365 1011scalarseq(OP *o)
79072805
LW		 1012{
1013 OP *kid;
1014
11343788
MB		 1015 if (o) {
1016 if (o->op_type == OP_LINESEQ ||
1017 o->op_type == OP_SCOPE ||
1018 o->op_type == OP_LEAVE ||
1019 o->op_type == OP_LEAVETRY)
463ee0b2 1020 {
0f15f207 1021 dTHR;
11343788 1022 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1023 if (kid->op_sibling) {
463ee0b2 1024 scalarvoid(kid);
ed6116ce 1025 }
463ee0b2
LW		 1026 }
1027 curcop = &compiling;
79072805 1028 }
11343788 1029 o->op_flags &= ~OPf_PARENS;
85e6fe83 1030 if (hints & HINT_BLOCK_SCOPE)
11343788 1031 o->op_flags |= OPf_PARENS;
79072805 1032 }
8990e307 1033 else
11343788
MB		 1034 o = newOP(OP_STUB, 0);
1035 return o;
79072805
LW		 1036}
1037
a0d0e21e 1038static OP *
8ac85365 1039modkids(OP *o, I32 type)
79072805
LW		 1040{
1041 OP *kid;
11343788
MB		 1042 if (o && o->op_flags & OPf_KIDS) {
1043 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1044 mod(kid, type);
79072805 1045 }
11343788 1046 return o;
79072805
LW		 1047}
1048
463ee0b2 1049static I32 modcount;
79072805
LW		 1050
1051OP *
8ac85365 1052mod(OP *o, I32 type)
79072805 1053{
11343788 1054 dTHR;
79072805
LW		 1055 OP *kid;
1056 SV *sv;
1057
11343788
MB		 1058 if (!o || error_count)
1059 return o;
79072805 1060
11343788 1061 switch (o->op_type) {
68dc0745 1062 case OP_UNDEF:
3e3baf6d 1063 modcount++;
5dc0d613 1064 return o;
a0d0e21e 1065 case OP_CONST:
11343788 1066 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1067 goto nomod;
1068 if (eval_start && eval_start->op_type == OP_CONST) {
1069 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1070 eval_start = 0;
1071 }
1072 else if (!type) {
1073 SAVEI32(compiling.cop_arybase);
748a9306 1074 compiling.cop_arybase = 0;
a0d0e21e
LW		 1075 }
1076 else if (type == OP_REFGEN)
1077 goto nomod;
1078 else
1079 croak("That use of $[ is unsupported");
1080 break;
5f05dabc 1081 case OP_STUB:
5196be3e 1082 if (o->op_flags & OPf_PARENS)
5f05dabc 1083 break;
1084 goto nomod;
a0d0e21e
LW		 1085 case OP_ENTERSUB:
1086 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1087 !(o->op_flags & OPf_STACKED)) {
1088 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1089 o->op_ppaddr = ppaddr[OP_RV2CV];
1090 assert(cUNOPo->op_first->op_type == OP_NULL);
1091 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1092 break;
1093 }
1094 /* FALL THROUGH */
1095 default:
a0d0e21e
LW		 1096 nomod:
1097 /* grep, foreach, subcalls, refgen */
1098 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1099 break;
46fc3d4c 1100 yyerror(form("Can't modify %s in %s",
5dc0d613 1101 op_desc[o->op_type],
46fc3d4c 1102 type ? op_desc[type] : "local"));
11343788 1103 return o;
79072805 1104
a0d0e21e
LW		 1105 case OP_PREINC:
1106 case OP_PREDEC:
1107 case OP_POW:
1108 case OP_MULTIPLY:
1109 case OP_DIVIDE:
1110 case OP_MODULO:
1111 case OP_REPEAT:
1112 case OP_ADD:
1113 case OP_SUBTRACT:
1114 case OP_CONCAT:
1115 case OP_LEFT_SHIFT:
1116 case OP_RIGHT_SHIFT:
1117 case OP_BIT_AND:
1118 case OP_BIT_XOR:
1119 case OP_BIT_OR:
1120 case OP_I_MULTIPLY:
1121 case OP_I_DIVIDE:
1122 case OP_I_MODULO:
1123 case OP_I_ADD:
1124 case OP_I_SUBTRACT:
11343788 1125 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1126 goto nomod;
1127 modcount++;
1128 break;
1129
79072805 1130 case OP_COND_EXPR:
11343788 1131 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1132 mod(kid, type);
79072805
LW		 1133 break;
1134
1135 case OP_RV2AV:
1136 case OP_RV2HV:
93af7a87 1137 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1138 croak("Can't localize through a reference");
11343788 1139 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1140 modcount = 10000;
11343788 1141 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1142 }
1143 /* FALL THROUGH */
79072805 1144 case OP_RV2GV:
5dc0d613 1145 if (scalar_mod_type(o, type))
3fe9a6f1 1146 goto nomod;
11343788 1147 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1148 /* FALL THROUGH */
1149 case OP_AASSIGN:
1150 case OP_ASLICE:
1151 case OP_HSLICE:
93a17b20
LW		 1152 case OP_NEXTSTATE:
1153 case OP_DBSTATE:
a0d0e21e
LW		 1154 case OP_REFGEN:
1155 case OP_CHOMP:
463ee0b2 1156 modcount = 10000;
79072805 1157 break;
463ee0b2 1158 case OP_RV2SV:
11343788 1159 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1160 croak("Can't localize through a reference");
aeea060c 1161 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1162 /* FALL THROUGH */
79072805 1163 case OP_GV:
463ee0b2
LW		 1164 case OP_AV2ARYLEN:
1165 case OP_SASSIGN:
8990e307
LW		 1166 case OP_AELEMFAST:
1167 modcount++;
1168 break;
1169
748a9306
LW		 1170 case OP_PADAV:
1171 case OP_PADHV:
1172 modcount = 10000;
5196be3e
MB		 1173 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1174 return o; /* Treat \(@foo) like ordinary list. */
1175 if (scalar_mod_type(o, type))
3fe9a6f1 1176 goto nomod;
748a9306
LW		 1177 /* FALL THROUGH */
1178 case OP_PADSV:
1179 modcount++;
1180 if (!type)
1181 croak("Can't localize lexical variable %s",
11343788 1182 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1183 break;
1184
554b3eca 1185#ifdef USE_THREADS
2faa37cc 1186 case OP_THREADSV:
554b3eca 1187 modcount++; /* XXX ??? */
554b3eca
MB		 1188 break;
1189#endif /* USE_THREADS */
1190
748a9306
LW		 1191 case OP_PUSHMARK:
1192 break;
a0d0e21e 1193
69969c6f
SB		 1194 case OP_KEYS:
1195 if (type != OP_SASSIGN)
1196 goto nomod;
5f05dabc 1197 /* FALL THROUGH */
a0d0e21e 1198 case OP_POS:
463ee0b2 1199 case OP_VEC:
a0d0e21e 1200 case OP_SUBSTR:
11343788
MB		 1201 pad_free(o->op_targ);
1202 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1203 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1204 if (o->op_flags & OPf_KIDS)
1205 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1206 break;
a0d0e21e 1207
463ee0b2
LW		 1208 case OP_AELEM:
1209 case OP_HELEM:
11343788 1210 ref(cBINOPo->op_first, o->op_type);
68dc0745 1211 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1212 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1213 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1214 modcount++;
463ee0b2
LW		 1215 break;
1216
1217 case OP_SCOPE:
1218 case OP_LEAVE:
1219 case OP_ENTER:
11343788
MB		 1220 if (o->op_flags & OPf_KIDS)
1221 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1222 break;
1223
1224 case OP_NULL:
11343788 1225 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1226 break;
11343788
MB		 1227 if (o->op_targ != OP_LIST) {
1228 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1229 break;
1230 }
1231 /* FALL THROUGH */
463ee0b2 1232 case OP_LIST:
11343788 1233 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1234 mod(kid, type);
1235 break;
1236 }
11343788 1237 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1238
1239 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1240 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1241 else if (!type) {
11343788
MB		 1242 o->op_private |= OPpLVAL_INTRO;
1243 o->op_flags &= ~OPf_SPECIAL;
463ee0b2 1244 }
a0d0e21e 1245 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1246 o->op_flags |= OPf_REF;
1247 return o;
463ee0b2
LW		 1248}
1249
3fe9a6f1 1250static bool
8ac85365 1251scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1252{
1253 switch (type) {
1254 case OP_SASSIGN:
5196be3e 1255 if (o->op_type == OP_RV2GV)
3fe9a6f1 1256 return FALSE;
1257 /* FALL THROUGH */
1258 case OP_PREINC:
1259 case OP_PREDEC:
1260 case OP_POSTINC:
1261 case OP_POSTDEC:
1262 case OP_I_PREINC:
1263 case OP_I_PREDEC:
1264 case OP_I_POSTINC:
1265 case OP_I_POSTDEC:
1266 case OP_POW:
1267 case OP_MULTIPLY:
1268 case OP_DIVIDE:
1269 case OP_MODULO:
1270 case OP_REPEAT:
1271 case OP_ADD:
1272 case OP_SUBTRACT:
1273 case OP_I_MULTIPLY:
1274 case OP_I_DIVIDE:
1275 case OP_I_MODULO:
1276 case OP_I_ADD:
1277 case OP_I_SUBTRACT:
1278 case OP_LEFT_SHIFT:
1279 case OP_RIGHT_SHIFT:
1280 case OP_BIT_AND:
1281 case OP_BIT_XOR:
1282 case OP_BIT_OR:
1283 case OP_CONCAT:
1284 case OP_SUBST:
1285 case OP_TRANS:
1286 case OP_ANDASSIGN: /* may work later */
1287 case OP_ORASSIGN: /* may work later */
1288 return TRUE;
1289 default:
1290 return FALSE;
1291 }
1292}
1293
463ee0b2 1294OP *
8ac85365 1295refkids(OP *o, I32 type)
463ee0b2
LW		 1296{
1297 OP *kid;
11343788
MB		 1298 if (o && o->op_flags & OPf_KIDS) {
1299 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1300 ref(kid, type);
1301 }
11343788 1302 return o;
463ee0b2
LW		 1303}
1304
1305OP *
8ac85365 1306ref(OP *o, I32 type)
463ee0b2
LW		 1307{
1308 OP *kid;
463ee0b2 1309
11343788
MB		 1310 if (!o || error_count)
1311 return o;
463ee0b2 1312
11343788 1313 switch (o->op_type) {
a0d0e21e 1314 case OP_ENTERSUB:
e55aaa0e 1315 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1316 !(o->op_flags & OPf_STACKED)) {
1317 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1318 o->op_ppaddr = ppaddr[OP_RV2CV];
1319 assert(cUNOPo->op_first->op_type == OP_NULL);
1320 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1321 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1322 }
1323 break;
aeea060c 1324
463ee0b2 1325 case OP_COND_EXPR:
11343788 1326 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1327 ref(kid, type);
1328 break;
8990e307 1329 case OP_RV2SV:
11343788 1330 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1331 /* FALL THROUGH */
1332 case OP_PADSV:
5f05dabc 1333 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1334 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1335 : type == OP_RV2HV ? OPpDEREF_HV
1336 : OPpDEREF_SV);
11343788 1337 o->op_flags |= OPf_MOD;
a0d0e21e 1338 }
8990e307
LW		 1339 break;
1340
2faa37cc 1341 case OP_THREADSV:
a863c7d1
MB		 1342 o->op_flags |= OPf_MOD; /* XXX ??? */
1343 break;
1344
463ee0b2
LW		 1345 case OP_RV2AV:
1346 case OP_RV2HV:
aeea060c 1347 o->op_flags |= OPf_REF;
8990e307 1348 /* FALL THROUGH */
463ee0b2 1349 case OP_RV2GV:
11343788 1350 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1351 break;
8990e307 1352
463ee0b2
LW		 1353 case OP_PADAV:
1354 case OP_PADHV:
aeea060c 1355 o->op_flags |= OPf_REF;
79072805 1356 break;
aeea060c 1357
8990e307 1358 case OP_SCALAR:
79072805 1359 case OP_NULL:
11343788 1360 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1361 break;
11343788 1362 ref(cBINOPo->op_first, type);
79072805
LW		 1363 break;
1364 case OP_AELEM:
1365 case OP_HELEM:
11343788 1366 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1367 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1368 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1369 : type == OP_RV2HV ? OPpDEREF_HV
1370 : OPpDEREF_SV);
11343788 1371 o->op_flags |= OPf_MOD;
8990e307 1372 }
79072805
LW		 1373 break;
1374
463ee0b2 1375 case OP_SCOPE:
79072805
LW		 1376 case OP_LEAVE:
1377 case OP_ENTER:
8990e307 1378 case OP_LIST:
11343788 1379 if (!(o->op_flags & OPf_KIDS))
79072805 1380 break;
11343788 1381 ref(cLISTOPo->op_last, type);
79072805 1382 break;
a0d0e21e
LW		 1383 default:
1384 break;
79072805 1385 }
11343788 1386 return scalar(o);
8990e307 1387
79072805
LW		 1388}
1389
1390OP *
8ac85365 1391my(OP *o)
93a17b20
LW		 1392{
1393 OP *kid;
93a17b20
LW		 1394 I32 type;
1395
11343788
MB		 1396 if (!o || error_count)
1397 return o;
93a17b20 1398
11343788 1399 type = o->op_type;
93a17b20 1400 if (type == OP_LIST) {
11343788 1401 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20
LW		 1402 my(kid);
1403 }
1404 else if (type != OP_PADSV &&
1405 type != OP_PADAV &&
1406 type != OP_PADHV &&
1407 type != OP_PUSHMARK)
1408 {
5dc0d613 1409 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1410 return o;
93a17b20 1411 }
11343788
MB		 1412 o->op_flags |= OPf_MOD;
1413 o->op_private |= OPpLVAL_INTRO;
1414 return o;
93a17b20
LW		 1415}
1416
1417OP *
8ac85365 1418sawparens(OP *o)
79072805
LW		 1419{
1420 if (o)
1421 o->op_flags |= OPf_PARENS;
1422 return o;
1423}
1424
1425OP *
8ac85365 1426bind_match(I32 type, OP *left, OP *right)
79072805 1427{
11343788 1428 OP *o;
79072805 1429
2ae324a7 1430 if (dowarn &&
1431 (left->op_type == OP_RV2AV ||
1432 left->op_type == OP_RV2HV ||
1433 left->op_type == OP_PADAV ||
1434 left->op_type == OP_PADHV)) {
1435 char *desc = op_desc[(right->op_type == OP_SUBST ||
1436 right->op_type == OP_TRANS)
1437 ? right->op_type : OP_MATCH];
1438 char *sample = ((left->op_type == OP_RV2AV ||
1439 left->op_type == OP_PADAV)
1440 ? "@array" : "%hash");
1441 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1442 }
1443
79072805
LW		 1444 if (right->op_type == OP_MATCH ||
1445 right->op_type == OP_SUBST ||
1446 right->op_type == OP_TRANS) {
1447 right->op_flags |= OPf_STACKED;
1448 if (right->op_type != OP_MATCH)
463ee0b2 1449 left = mod(left, right->op_type);
79072805 1450 if (right->op_type == OP_TRANS)
11343788 1451 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1452 else
11343788 1453 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1454 if (type == OP_NOT)
11343788
MB		 1455 return newUNOP(OP_NOT, 0, scalar(o));
1456 return o;
79072805
LW		 1457 }
1458 else
1459 return bind_match(type, left,
1460 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1461}
1462
1463OP *
8ac85365 1464invert(OP *o)
79072805 1465{
11343788
MB		 1466 if (!o)
1467 return o;
79072805 1468 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1469 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1470}
1471
1472OP *
8ac85365 1473scope(OP *o)
79072805
LW		 1474{
1475 if (o) {
84902520 1476 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1477 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1478 o->op_type = OP_LEAVE;
1479 o->op_ppaddr = ppaddr[OP_LEAVE];
1480 }
1481 else {
1482 if (o->op_type == OP_LINESEQ) {
1483 OP *kid;
1484 o->op_type = OP_SCOPE;
1485 o->op_ppaddr = ppaddr[OP_SCOPE];
1486 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1487 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1488 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1489 null(kid);
748a9306 1490 }
463ee0b2
LW		 1491 }
1492 else
748a9306 1493 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1494 }
79072805
LW		 1495 }
1496 return o;
1497}
1498
a0d0e21e 1499int
8ac85365 1500block_start(int full)
79072805 1501{
11343788 1502 dTHR;
a0d0e21e 1503 int retval = savestack_ix;
55497cff 1504 SAVEI32(comppad_name_floor);
1505 if (full) {
1506 if ((comppad_name_fill = AvFILL(comppad_name)) > 0)
1507 comppad_name_floor = comppad_name_fill;
1508 else
1509 comppad_name_floor = 0;
1510 }
1511 SAVEI32(min_intro_pending);
1512 SAVEI32(max_intro_pending);
a0d0e21e 1513 min_intro_pending = 0;
55497cff 1514 SAVEI32(comppad_name_fill);
1515 SAVEI32(padix_floor);
a0d0e21e
LW		 1516 padix_floor = padix;
1517 pad_reset_pending = FALSE;
55497cff 1518 SAVEI32(hints);
a0d0e21e
LW		 1519 hints &= ~HINT_BLOCK_SCOPE;
1520 return retval;
1521}
1522
1523OP*
8ac85365 1524block_end(I32 floor, OP *seq)
a0d0e21e 1525{
11343788 1526 dTHR;
a0d0e21e
LW		 1527 int needblockscope = hints & HINT_BLOCK_SCOPE;
1528 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1529 LEAVE_SCOPE(floor);
1530 pad_reset_pending = FALSE;
1531 if (needblockscope)
1532 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1533 pad_leavemy(comppad_name_fill);
bbce6d69 1534 cop_seqmax++;
a0d0e21e
LW		 1535 return retval;
1536}
1537
54b9620d
MB		 1538static OP *
1539newDEFSVOP(void)
1540{
1541#ifdef USE_THREADS
1542 OP *o = newOP(OP_THREADSV, 0);
1543 o->op_targ = find_threadsv("_");
1544 return o;
1545#else
1546 return newSVREF(newGVOP(OP_GV, 0, defgv));
1547#endif /* USE_THREADS */
1548}
1549
a0d0e21e 1550void
8ac85365 1551newPROG(OP *o)
a0d0e21e 1552{
11343788 1553 dTHR;
a0d0e21e 1554 if (in_eval) {
5dc0d613 1555 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1556 eval_start = linklist(eval_root);
1557 eval_root->op_next = 0;
1558 peep(eval_start);
1559 }
1560 else {
5dc0d613 1561 if (!o)
a0d0e21e 1562 return;
11343788 1563 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1564 curcop = &compiling;
1565 main_start = LINKLIST(main_root);
1566 main_root->op_next = 0;
1567 peep(main_start);
748a9306 1568 compcv = 0;
3841441e 1569
4fdae800 1570 /* Register with debugger */
84902520 1571 if (PERLDB_INTER) {
3841441e 1572 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1573 if (cv) {
1574 dSP;
1575 PUSHMARK(sp);
1576 XPUSHs((SV*)compiling.cop_filegv);
1577 PUTBACK;
1578 perl_call_sv((SV*)cv, G_DISCARD);
1579 }
1580 }
79072805 1581 }
79072805
LW		 1582}
1583
1584OP *
8ac85365 1585localize(OP *o, I32 lex)
79072805
LW		 1586{
1587 if (o->op_flags & OPf_PARENS)
1588 list(o);
8990e307 1589 else {
79072805 1590 scalar(o);
8990e307
LW		 1591 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1592 char *s;
1593 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1594 if (*s == ';' || *s == '=')
8990e307
LW		 1595 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1596 }
1597 }
93a17b20 1598 in_my = FALSE;
c750a3ec 1599 in_my_stash = Nullhv;
93a17b20
LW		 1600 if (lex)
1601 return my(o);
1602 else
463ee0b2 1603 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1604}
1605
1606OP *
8ac85365 1607jmaybe(OP *o)
79072805
LW		 1608{
1609 if (o->op_type == OP_LIST) {
554b3eca
MB		 1610 OP *o2;
1611#ifdef USE_THREADS
2faa37cc 1612 o2 = newOP(OP_THREADSV, 0);
54b9620d 1613 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1614#else
1615 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1616#endif /* USE_THREADS */
1617 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1618 }
1619 return o;
1620}
1621
1622OP *
8ac85365 1623fold_constants(register OP *o)
79072805 1624{
11343788 1625 dTHR;
79072805
LW		 1626 register OP *curop;
1627 I32 type = o->op_type;
748a9306 1628 SV *sv;
79072805
LW		 1629
1630 if (opargs[type] & OA_RETSCALAR)
1631 scalar(o);
1632 if (opargs[type] & OA_TARGET)
ed6116ce 1633 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1634
85e6fe83 1635 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1636 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1637
79072805
LW		 1638 if (!(opargs[type] & OA_FOLDCONST))
1639 goto nope;
1640
de939608
CS		 1641 switch (type) {
1642 case OP_SPRINTF:
1643 case OP_UCFIRST:
1644 case OP_LCFIRST:
1645 case OP_UC:
1646 case OP_LC:
1647 if (o->op_private & OPpLOCALE)
1648 goto nope;
1649 }
1650
a0d0e21e
LW		 1651 if (error_count)
1652 goto nope; /* Don't try to run w/ errors */
1653
79072805 1654 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1655 if (curop->op_type != OP_CONST &&
1656 curop->op_type != OP_LIST &&
1657 curop->op_type != OP_SCALAR &&
a0d0e21e 1658 curop->op_type != OP_NULL &&
93a17b20 1659 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1660 goto nope;
1661 }
1662 }
1663
1664 curop = LINKLIST(o);
1665 o->op_next = 0;
1666 op = curop;
8da795c6 1667 runops();
748a9306
LW		 1668 sv = *(stack_sp--);
1669 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1670 pad_swipe(o->op_targ);
748a9306
LW		 1671 else if (SvTEMP(sv)) { /* grab mortal temp? */
1672 (void)SvREFCNT_inc(sv);
1673 SvTEMP_off(sv);
85e6fe83 1674 }
79072805
LW		 1675 op_free(o);
1676 if (type == OP_RV2GV)
b1cb66bf 1677 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306
LW		 1678 else {
1679 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK) {
1680 IV iv = SvIV(sv);
1681 if ((double)iv == SvNV(sv)) { /* can we smush double to int */
1682 SvREFCNT_dec(sv);
1683 sv = newSViv(iv);
1684 }
b1cb66bf 1685 else
1686 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1687 }
1688 return newSVOP(OP_CONST, 0, sv);
1689 }
aeea060c 1690
79072805
LW		 1691 nope:
1692 if (!(opargs[type] & OA_OTHERINT))
1693 return o;
79072805 1694
85e6fe83 1695 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1696 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1697 return o;
1698
1699 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1700 if (curop->op_type == OP_CONST) {
b1cb66bf 1701 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1702 continue;
1703 return o;
1704 }
1705 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1706 continue;
1707 return o;
1708 }
a0d0e21e 1709 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1710 }
1711
79072805
LW		 1712 return o;
1713}
1714
1715OP *
8ac85365 1716gen_constant_list(register OP *o)
79072805 1717{
11343788 1718 dTHR;
79072805 1719 register OP *curop;
79072805 1720 I32 oldtmps_floor = tmps_floor;
79072805 1721
a0d0e21e
LW		 1722 list(o);
1723 if (error_count)
1724 return o; /* Don't attempt to run with errors */
1725
1726 op = curop = LINKLIST(o);
1727 o->op_next = 0;
11343788 1728 pp_pushmark(ARGS);
8da795c6 1729 runops();
a0d0e21e 1730 op = curop;
11343788 1731 pp_anonlist(ARGS);
79072805 1732 tmps_floor = oldtmps_floor;
79072805
LW		 1733
1734 o->op_type = OP_RV2AV;
1735 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1736 curop = ((UNOP*)o)->op_first;
a0d0e21e 1737 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1738 op_free(curop);
79072805
LW		 1739 linklist(o);
1740 return list(o);
1741}
1742
1743OP *
8ac85365 1744convert(I32 type, I32 flags, OP *o)
79072805
LW		 1745{
1746 OP *kid;
a0d0e21e 1747 OP *last = 0;
79072805 1748
11343788
MB		 1749 if (!o || o->op_type != OP_LIST)
1750 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1751 else
5dc0d613 1752 o->op_flags &= ~OPf_WANT;
79072805 1753
8990e307 1754 if (!(opargs[type] & OA_MARK))
11343788 1755 null(cLISTOPo->op_first);
8990e307 1756
11343788
MB		 1757 o->op_type = type;
1758 o->op_ppaddr = ppaddr[type];
1759 o->op_flags |= flags;
79072805 1760
11343788
MB		 1761 o = CHECKOP(type, o);
1762 if (o->op_type != type)
1763 return o;
79072805 1764
11343788 1765 if (cLISTOPo->op_children < 7) {
79072805 1766 /* XXX do we really need to do this if we're done appending?? */
11343788 1767 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1768 last = kid;
11343788 1769 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1770 }
1771
11343788 1772 return fold_constants(o);
79072805
LW		 1773}
1774
1775/* List constructors */
1776
1777OP *
8ac85365 1778append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1779{
1780 if (!first)
1781 return last;
8990e307
LW		 1782
1783 if (!last)
79072805 1784 return first;
8990e307 1785
a0d0e21e
LW		 1786 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1787 return newLISTOP(type, 0, first, last);
79072805 1788
a0d0e21e
LW		 1789 if (first->op_flags & OPf_KIDS)
1790 ((LISTOP*)first)->op_last->op_sibling = last;
1791 else {
1792 first->op_flags |= OPf_KIDS;
1793 ((LISTOP*)first)->op_first = last;
1794 }
1795 ((LISTOP*)first)->op_last = last;
1796 ((LISTOP*)first)->op_children++;
1797 return first;
79072805
LW		 1798}
1799
1800OP *
8ac85365 1801append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1802{
1803 if (!first)
1804 return (OP*)last;
8990e307
LW		 1805
1806 if (!last)
79072805 1807 return (OP*)first;
8990e307
LW		 1808
1809 if (first->op_type != type)
79072805 1810 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1811
1812 if (last->op_type != type)
79072805
LW		 1813 return append_elem(type, (OP*)first, (OP*)last);
1814
1815 first->op_last->op_sibling = last->op_first;
1816 first->op_last = last->op_last;
1817 first->op_children += last->op_children;
1818 if (first->op_children)
1819 last->op_flags |= OPf_KIDS;
1820
1821 Safefree(last);
1822 return (OP*)first;
1823}
1824
1825OP *
8ac85365 1826prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1827{
1828 if (!first)
1829 return last;
8990e307
LW		 1830
1831 if (!last)
79072805 1832 return first;
8990e307
LW		 1833
1834 if (last->op_type == type) {
1835 if (type == OP_LIST) { /* already a PUSHMARK there */
1836 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1837 ((LISTOP*)last)->op_first->op_sibling = first;
1838 }
1839 else {
1840 if (!(last->op_flags & OPf_KIDS)) {
1841 ((LISTOP*)last)->op_last = first;
1842 last->op_flags |= OPf_KIDS;
1843 }
1844 first->op_sibling = ((LISTOP*)last)->op_first;
1845 ((LISTOP*)last)->op_first = first;
79072805 1846 }
79072805
LW		 1847 ((LISTOP*)last)->op_children++;
1848 return last;
1849 }
1850
1851 return newLISTOP(type, 0, first, last);
1852}
1853
1854/* Constructors */
1855
1856OP *
8ac85365 1857newNULLLIST(void)
79072805 1858{
8990e307
LW		 1859 return newOP(OP_STUB, 0);
1860}
1861
1862OP *
8ac85365 1863force_list(OP *o)
8990e307 1864{
11343788
MB		 1865 if (!o || o->op_type != OP_LIST)
1866 o = newLISTOP(OP_LIST, 0, o, Nullop);
1867 null(o);
1868 return o;
79072805
LW		 1869}
1870
1871OP *
8ac85365 1872newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1873{
1874 LISTOP *listop;
1875
1876 Newz(1101, listop, 1, LISTOP);
1877
1878 listop->op_type = type;
1879 listop->op_ppaddr = ppaddr[type];
1880 listop->op_children = (first != 0) + (last != 0);
1881 listop->op_flags = flags;
79072805
LW		 1882
1883 if (!last && first)
1884 last = first;
1885 else if (!first && last)
1886 first = last;
8990e307
LW		 1887 else if (first)
1888 first->op_sibling = last;
79072805
LW		 1889 listop->op_first = first;
1890 listop->op_last = last;
8990e307
LW		 1891 if (type == OP_LIST) {
1892 OP* pushop;
1893 pushop = newOP(OP_PUSHMARK, 0);
1894 pushop->op_sibling = first;
1895 listop->op_first = pushop;
1896 listop->op_flags |= OPf_KIDS;
1897 if (!last)
1898 listop->op_last = pushop;
1899 }
1900 else if (listop->op_children)
1901 listop->op_flags |= OPf_KIDS;
79072805
LW		 1902
1903 return (OP*)listop;
1904}
1905
1906OP *
8ac85365 1907newOP(I32 type, I32 flags)
79072805 1908{
11343788
MB		 1909 OP *o;
1910 Newz(1101, o, 1, OP);
1911 o->op_type = type;
1912 o->op_ppaddr = ppaddr[type];
1913 o->op_flags = flags;
79072805 1914
11343788
MB		 1915 o->op_next = o;
1916 o->op_private = 0 + (flags >> 8);
79072805 1917 if (opargs[type] & OA_RETSCALAR)
11343788 1918 scalar(o);
79072805 1919 if (opargs[type] & OA_TARGET)
11343788
MB		 1920 o->op_targ = pad_alloc(type, SVs_PADTMP);
1921 return CHECKOP(type, o);
79072805
LW		 1922}
1923
1924OP *
8ac85365 1925newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1926{
1927 UNOP *unop;
1928
93a17b20 1929 if (!first)
aeea060c 1930 first = newOP(OP_STUB, 0);
8990e307
LW		 1931 if (opargs[type] & OA_MARK)
1932 first = force_list(first);
93a17b20 1933
79072805
LW		 1934 Newz(1101, unop, 1, UNOP);
1935 unop->op_type = type;
1936 unop->op_ppaddr = ppaddr[type];
1937 unop->op_first = first;
1938 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1939 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1940#if 1
1941 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1942 first->op_type = OP_PUSHRE;
1943 first->op_ppaddr = ppaddr[OP_PUSHRE];
1944 }
1945#endif
e50aee73 1946 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1947 if (unop->op_next)
1948 return (OP*)unop;
1949
a0d0e21e 1950 return fold_constants((OP *) unop);
79072805
LW		 1951}
1952
1953OP *
8ac85365 1954newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1955{
1956 BINOP *binop;
1957 Newz(1101, binop, 1, BINOP);
1958
1959 if (!first)
1960 first = newOP(OP_NULL, 0);
1961
1962 binop->op_type = type;
1963 binop->op_ppaddr = ppaddr[type];
1964 binop->op_first = first;
1965 binop->op_flags = flags | OPf_KIDS;
1966 if (!last) {
1967 last = first;
c07a80fd 1968 binop->op_private = 1 | (flags >> 8);
79072805
LW		 1969 }
1970 else {
c07a80fd 1971 binop->op_private = 2 | (flags >> 8);
79072805
LW		 1972 first->op_sibling = last;
1973 }
1974
e50aee73 1975 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 1976 if (binop->op_next)
1977 return (OP*)binop;
1978
1979 binop->op_last = last = binop->op_first->op_sibling;
1980
a0d0e21e 1981 return fold_constants((OP *)binop);
79072805
LW		 1982}
1983
1984OP *
8ac85365 1985pmtrans(OP *o, OP *expr, OP *repl)
79072805 1986{
79072805
LW		 1987 SV *tstr = ((SVOP*)expr)->op_sv;
1988 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 1989 STRLEN tlen;
1990 STRLEN rlen;
ec49126f 1991 register U8 *t = (U8*)SvPV(tstr, tlen);
1992 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 1993 register I32 i;
1994 register I32 j;
8ac85365 1995 I32 Delete;
79072805
LW		 1996 I32 complement;
1997 register short *tbl;
1998
11343788
MB		 1999 tbl = (short*)cPVOPo->op_pv;
2000 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 2001 Delete = o->op_private & OPpTRANS_DELETE;
11343788 2002 /* squash = o->op_private & OPpTRANS_SQUASH; */
79072805
LW		 2003
2004 if (complement) {
2005 Zero(tbl, 256, short);
2006 for (i = 0; i < tlen; i++)
ec49126f 2007 tbl[t[i]] = -1;
79072805
LW		 2008 for (i = 0, j = 0; i < 256; i++) {
2009 if (!tbl[i]) {
2010 if (j >= rlen) {
8ac85365 2011 if (Delete)
79072805
LW		 2012 tbl[i] = -2;
2013 else if (rlen)
ec49126f 2014 tbl[i] = r[j-1];
79072805
LW		 2015 else
2016 tbl[i] = i;
2017 }
2018 else
ec49126f 2019 tbl[i] = r[j++];
79072805
LW		 2020 }
2021 }
2022 }
2023 else {
8ac85365 2024 if (!rlen && !Delete) {
79072805
LW		 2025 r = t; rlen = tlen;
2026 }
2027 for (i = 0; i < 256; i++)
2028 tbl[i] = -1;
2029 for (i = 0, j = 0; i < tlen; i++,j++) {
2030 if (j >= rlen) {
8ac85365 2031 if (Delete) {
ec49126f 2032 if (tbl[t[i]] == -1)
2033 tbl[t[i]] = -2;
79072805
LW		 2034 continue;
2035 }
2036 --j;
2037 }
ec49126f 2038 if (tbl[t[i]] == -1)
2039 tbl[t[i]] = r[j];
79072805
LW		 2040 }
2041 }
2042 op_free(expr);
2043 op_free(repl);
2044
11343788 2045 return o;
79072805
LW		 2046}
2047
2048OP *
8ac85365 2049newPMOP(I32 type, I32 flags)
79072805 2050{
11343788 2051 dTHR;
79072805
LW		 2052 PMOP *pmop;
2053
2054 Newz(1101, pmop, 1, PMOP);
2055 pmop->op_type = type;
2056 pmop->op_ppaddr = ppaddr[type];
2057 pmop->op_flags = flags;
c07a80fd 2058 pmop->op_private = 0 | (flags >> 8);
79072805 2059
36477c24 2060 if (hints & HINT_LOCALE)
2061 pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE);
2062
79072805 2063 /* link into pm list */
a0d0e21e 2064 if (type != OP_TRANS && curstash) {
79072805
LW		 2065 pmop->op_pmnext = HvPMROOT(curstash);
2066 HvPMROOT(curstash) = pmop;
2067 }
2068
2069 return (OP*)pmop;
2070}
2071
2072OP *
8ac85365 2073pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2074{
2075 PMOP *pm;
2076 LOGOP *rcop;
2077
11343788
MB		 2078 if (o->op_type == OP_TRANS)
2079 return pmtrans(o, expr, repl);
79072805 2080
3e3baf6d 2081 hints |= HINT_BLOCK_SCOPE;
11343788 2082 pm = (PMOP*)o;
79072805
LW		 2083
2084 if (expr->op_type == OP_CONST) {
463ee0b2 2085 STRLEN plen;
79072805 2086 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2087 char *p = SvPV(pat, plen);
11343788 2088 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2089 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2090 p = SvPV(pat, plen);
79072805
LW		 2091 pm->op_pmflags |= PMf_SKIPWHITE;
2092 }
e50aee73 2093 pm->op_pmregexp = pregcomp(p, p + plen, pm);
aeea060c 2094 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2095 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2096 op_free(expr);
2097 }
2098 else {
463ee0b2
LW		 2099 if (pm->op_pmflags & PMf_KEEP)
2100 expr = newUNOP(OP_REGCMAYBE,0,expr);
2101
79072805
LW		 2102 Newz(1101, rcop, 1, LOGOP);
2103 rcop->op_type = OP_REGCOMP;
2104 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2105 rcop->op_first = scalar(expr);
2106 rcop->op_flags |= OPf_KIDS;
2107 rcop->op_private = 1;
11343788 2108 rcop->op_other = o;
79072805
LW		 2109
2110 /* establish postfix order */
463ee0b2
LW		 2111 if (pm->op_pmflags & PMf_KEEP) {
2112 LINKLIST(expr);
2113 rcop->op_next = expr;
2114 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2115 }
2116 else {
2117 rcop->op_next = LINKLIST(expr);
2118 expr->op_next = (OP*)rcop;
2119 }
79072805 2120
11343788 2121 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2122 }
2123
2124 if (repl) {
748a9306
LW		 2125 OP *curop;
2126 if (pm->op_pmflags & PMf_EVAL)
2127 curop = 0;
554b3eca 2128#ifdef USE_THREADS
2faa37cc 2129 else if (repl->op_type == OP_THREADSV
554b3eca 2130 && strchr("&`'123456789+",
54b9620d 2131 threadsv_names[repl->op_targ]))
554b3eca
MB		 2132 {
2133 curop = 0;
2134 }
2135#endif /* USE_THREADS */
748a9306
LW		 2136 else if (repl->op_type == OP_CONST)
2137 curop = repl;
79072805 2138 else {
79072805
LW		 2139 OP *lastop = 0;
2140 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2141 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2142#ifdef USE_THREADS
2faa37cc 2143 if (curop->op_type == OP_THREADSV
554b3eca
MB		 2144 && strchr("&`'123456789+", curop->op_private)) {
2145 break;
2146 }
2147#else
79072805
LW		 2148 if (curop->op_type == OP_GV) {
2149 GV *gv = ((GVOP*)curop)->op_gv;
93a17b20 2150 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2151 break;
2152 }
554b3eca 2153#endif /* USE_THREADS */
79072805
LW		 2154 else if (curop->op_type == OP_RV2CV)
2155 break;
2156 else if (curop->op_type == OP_RV2SV ||
2157 curop->op_type == OP_RV2AV ||
2158 curop->op_type == OP_RV2HV ||
2159 curop->op_type == OP_RV2GV) {
2160 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2161 break;
2162 }
748a9306
LW		 2163 else if (curop->op_type == OP_PADSV ||
2164 curop->op_type == OP_PADAV ||
2165 curop->op_type == OP_PADHV ||
554b3eca 2166 curop->op_type == OP_PADANY) {
748a9306
LW		 2167 /* is okay */
2168 }
79072805
LW		 2169 else
2170 break;
2171 }
2172 lastop = curop;
2173 }
748a9306
LW		 2174 }
2175 if (curop == repl) {
2176 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2177 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2178 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2179 }
2180 else {
2181 Newz(1101, rcop, 1, LOGOP);
2182 rcop->op_type = OP_SUBSTCONT;
2183 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2184 rcop->op_first = scalar(repl);
2185 rcop->op_flags |= OPf_KIDS;
2186 rcop->op_private = 1;
11343788 2187 rcop->op_other = o;
748a9306
LW		 2188
2189 /* establish postfix order */
2190 rcop->op_next = LINKLIST(repl);
2191 repl->op_next = (OP*)rcop;
2192
2193 pm->op_pmreplroot = scalar((OP*)rcop);
2194 pm->op_pmreplstart = LINKLIST(rcop);
2195 rcop->op_next = 0;
79072805
LW		 2196 }
2197 }
2198
2199 return (OP*)pm;
2200}
2201
2202OP *
8ac85365 2203newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2204{
2205 SVOP *svop;
2206 Newz(1101, svop, 1, SVOP);
2207 svop->op_type = type;
2208 svop->op_ppaddr = ppaddr[type];
2209 svop->op_sv = sv;
2210 svop->op_next = (OP*)svop;
2211 svop->op_flags = flags;
2212 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2213 scalar((OP*)svop);
79072805 2214 if (opargs[type] & OA_TARGET)
ed6116ce 2215 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2216 return CHECKOP(type, svop);
79072805
LW		 2217}
2218
2219OP *
8ac85365 2220newGVOP(I32 type, I32 flags, GV *gv)
79072805 2221{
11343788 2222 dTHR;
79072805
LW		 2223 GVOP *gvop;
2224 Newz(1101, gvop, 1, GVOP);
2225 gvop->op_type = type;
2226 gvop->op_ppaddr = ppaddr[type];
8990e307 2227 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2228 gvop->op_next = (OP*)gvop;
2229 gvop->op_flags = flags;
2230 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2231 scalar((OP*)gvop);
79072805 2232 if (opargs[type] & OA_TARGET)
ed6116ce 2233 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2234 return CHECKOP(type, gvop);
79072805
LW		 2235}
2236
2237OP *
8ac85365 2238newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2239{
2240 PVOP *pvop;
2241 Newz(1101, pvop, 1, PVOP);
2242 pvop->op_type = type;
2243 pvop->op_ppaddr = ppaddr[type];
2244 pvop->op_pv = pv;
2245 pvop->op_next = (OP*)pvop;
2246 pvop->op_flags = flags;
2247 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2248 scalar((OP*)pvop);
79072805 2249 if (opargs[type] & OA_TARGET)
ed6116ce 2250 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2251 return CHECKOP(type, pvop);
79072805
LW		 2252}
2253
79072805 2254void
8ac85365 2255package(OP *o)
79072805 2256{
11343788 2257 dTHR;
93a17b20 2258 SV *sv;
79072805
LW		 2259
2260 save_hptr(&curstash);
2261 save_item(curstname);
11343788 2262 if (o) {
463ee0b2
LW		 2263 STRLEN len;
2264 char *name;
11343788 2265 sv = cSVOPo->op_sv;
463ee0b2 2266 name = SvPV(sv, len);
b1cb66bf 2267 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2268 sv_setpvn(curstname, name, len);
11343788 2269 op_free(o);
93a17b20
LW		 2270 }
2271 else {
2272 sv_setpv(curstname,"<none>");
2273 curstash = Nullhv;
2274 }
79072805 2275 copline = NOLINE;
8990e307 2276 expect = XSTATE;
79072805
LW		 2277}
2278
85e6fe83 2279void
8ac85365 2280utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2281{
a0d0e21e
LW		 2282 OP *pack;
2283 OP *meth;
2284 OP *rqop;
2285 OP *imop;
b1cb66bf 2286 OP *veop;
85e6fe83 2287
a0d0e21e
LW		 2288 if (id->op_type != OP_CONST)
2289 croak("Module name must be constant");
85e6fe83 2290
b1cb66bf 2291 veop = Nullop;
2292
2293 if(version != Nullop) {
2294 SV *vesv = ((SVOP*)version)->op_sv;
2295
2296 if (arg == Nullop && !SvNIOK(vesv)) {
2297 arg = version;
2298 }
2299 else {
2300 OP *pack;
2301 OP *meth;
2302
2303 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2304 croak("Version number must be constant number");
2305
2306 /* Make copy of id so we don't free it twice */
2307 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2308
2309 /* Fake up a method call to VERSION */
2310 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2311 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2312 append_elem(OP_LIST,
2313 prepend_elem(OP_LIST, pack, list(version)),
2314 newUNOP(OP_METHOD, 0, meth)));
2315 }
2316 }
aeea060c 2317
a0d0e21e 2318 /* Fake up an import/unimport */
4633a7c4
LW		 2319 if (arg && arg->op_type == OP_STUB)
2320 imop = arg; /* no import on explicit () */
b1cb66bf 2321 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2322 imop = Nullop; /* use 5.0; */
2323 }
4633a7c4
LW		 2324 else {
2325 /* Make copy of id so we don't free it twice */
2326 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2327 meth = newSVOP(OP_CONST, 0,
2328 aver
2329 ? newSVpv("import", 6)
2330 : newSVpv("unimport", 8)
2331 );
2332 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2333 append_elem(OP_LIST,
2334 prepend_elem(OP_LIST, pack, list(arg)),
2335 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2336 }
2337
2338 /* Fake up a require */
2339 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2340
2341 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2342 newSUB(floor,
a0d0e21e 2343 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2344 Nullop,
a0d0e21e 2345 append_elem(OP_LINESEQ,
b1cb66bf 2346 append_elem(OP_LINESEQ,
2347 newSTATEOP(0, Nullch, rqop),
2348 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2349 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2350
85e6fe83
LW		 2351 copline = NOLINE;
2352 expect = XSTATE;
2353}
2354
79072805 2355OP *
8ac85365 2356newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2357{
2358 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2359 list(force_list(subscript)),
2360 list(force_list(listval)) );
79072805
LW		 2361}
2362
2363static I32
8ac85365 2364list_assignment(register OP *o)
79072805 2365{
11343788 2366 if (!o)
79072805
LW		 2367 return TRUE;
2368
11343788
MB		 2369 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2370 o = cUNOPo->op_first;
79072805 2371
11343788
MB		 2372 if (o->op_type == OP_COND_EXPR) {
2373 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2374 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2375
2376 if (t && f)
2377 return TRUE;
2378 if (t || f)
2379 yyerror("Assignment to both a list and a scalar");
2380 return FALSE;
2381 }
2382
11343788
MB		 2383 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2384 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2385 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2386 return TRUE;
2387
11343788 2388 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2389 return TRUE;
2390
11343788 2391 if (o->op_type == OP_RV2SV)
79072805
LW		 2392 return FALSE;
2393
2394 return FALSE;
2395}
2396
2397OP *
8ac85365 2398newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2399{
11343788 2400 OP *o;
79072805 2401
a0d0e21e
LW		 2402 if (optype) {
2403 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2404 return newLOGOP(optype, 0,
2405 mod(scalar(left), optype),
2406 newUNOP(OP_SASSIGN, 0, scalar(right)));
2407 }
2408 else {
2409 return newBINOP(optype, OPf_STACKED,
2410 mod(scalar(left), optype), scalar(right));
2411 }
2412 }
2413
79072805 2414 if (list_assignment(left)) {
463ee0b2 2415 modcount = 0;
748a9306 2416 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2417 left = mod(left, OP_AASSIGN);
748a9306
LW		 2418 if (eval_start)
2419 eval_start = 0;
2420 else {
a0d0e21e
LW		 2421 op_free(left);
2422 op_free(right);
2423 return Nullop;
2424 }
11343788 2425 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2426 list(force_list(right)),
2427 list(force_list(left)) );
11343788 2428 o->op_private = 0 | (flags >> 8);
a0d0e21e 2429 if (!(left->op_private & OPpLVAL_INTRO)) {
748a9306 2430 static int generation = 100;
79072805 2431 OP *curop;
11343788 2432 OP *lastop = o;
79072805 2433 generation++;
11343788 2434 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2435 if (opargs[curop->op_type] & OA_DANGEROUS) {
2436 if (curop->op_type == OP_GV) {
2437 GV *gv = ((GVOP*)curop)->op_gv;
2438 if (gv == defgv || SvCUR(gv) == generation)
2439 break;
2440 SvCUR(gv) = generation;
2441 }
748a9306
LW		 2442 else if (curop->op_type == OP_PADSV ||
2443 curop->op_type == OP_PADAV ||
2444 curop->op_type == OP_PADHV ||
2445 curop->op_type == OP_PADANY) {
2446 SV **svp = AvARRAY(comppad_name);
8e07c86e 2447 SV *sv = svp[curop->op_targ];
748a9306
LW		 2448 if (SvCUR(sv) == generation)
2449 break;
2450 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2451 }
79072805
LW		 2452 else if (curop->op_type == OP_RV2CV)
2453 break;
2454 else if (curop->op_type == OP_RV2SV ||
2455 curop->op_type == OP_RV2AV ||
2456 curop->op_type == OP_RV2HV ||
2457 curop->op_type == OP_RV2GV) {
2458 if (lastop->op_type != OP_GV) /* funny deref? */
2459 break;
2460 }
2461 else
2462 break;
2463 }
2464 lastop = curop;
2465 }
11343788
MB		 2466 if (curop != o)
2467 o->op_private = OPpASSIGN_COMMON;
79072805 2468 }
c07a80fd 2469 if (right && right->op_type == OP_SPLIT) {
2470 OP* tmpop;
2471 if ((tmpop = ((LISTOP*)right)->op_first) &&
2472 tmpop->op_type == OP_PUSHRE)
2473 {
2474 PMOP *pm = (PMOP*)tmpop;
2475 if (left->op_type == OP_RV2AV &&
2476 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2477 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2478 {
2479 tmpop = ((UNOP*)left)->op_first;
2480 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2481 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2482 pm->op_pmflags |= PMf_ONCE;
11343788 2483 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2484 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2485 tmpop->op_sibling = Nullop; /* don't free split */
2486 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2487 op_free(o); /* blow off assign */
54310121 2488 right->op_flags &= ~OPf_WANT;
a5f75d66 2489 /* "I don't know and I don't care." */
c07a80fd 2490 return right;
2491 }
2492 }
2493 else {
2494 if (modcount < 10000 &&
2495 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2496 {
2497 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2498 if (SvIVX(sv) == 0)
2499 sv_setiv(sv, modcount+1);
2500 }
2501 }
2502 }
2503 }
11343788 2504 return o;
79072805
LW		 2505 }
2506 if (!right)
2507 right = newOP(OP_UNDEF, 0);
2508 if (right->op_type == OP_READLINE) {
2509 right->op_flags |= OPf_STACKED;
463ee0b2 2510 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2511 }
a0d0e21e 2512 else {
748a9306 2513 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2514 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2515 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2516 if (eval_start)
2517 eval_start = 0;
2518 else {
11343788 2519 op_free(o);
a0d0e21e
LW		 2520 return Nullop;
2521 }
2522 }
11343788 2523 return o;
79072805
LW		 2524}
2525
2526OP *
8ac85365 2527newSTATEOP(I32 flags, char *label, OP *o)
79072805 2528{
11343788 2529 dTHR;
bbce6d69 2530 U32 seq = intro_my();
79072805
LW		 2531 register COP *cop;
2532
2533 Newz(1101, cop, 1, COP);
84902520 2534 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2535 cop->op_type = OP_DBSTATE;
2536 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2537 }
2538 else {
2539 cop->op_type = OP_NEXTSTATE;
2540 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2541 }
79072805 2542 cop->op_flags = flags;
c07a80fd 2543 cop->op_private = 0 | (flags >> 8);
ff0cee69 2544#ifdef NATIVE_HINTS
2545 cop->op_private |= NATIVE_HINTS;
2546#endif
79072805
LW		 2547 cop->op_next = (OP*)cop;
2548
463ee0b2
LW		 2549 if (label) {
2550 cop->cop_label = label;
85e6fe83 2551 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2552 }
bbce6d69 2553 cop->cop_seq = seq;
a0d0e21e 2554 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2555
2556 if (copline == NOLINE)
2557 cop->cop_line = curcop->cop_line;
2558 else {
2559 cop->cop_line = copline;
2560 copline = NOLINE;
2561 }
44a8e56a 2562 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2563 cop->cop_stash = curstash;
2564
84902520 2565 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2566 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2567 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2568 (void)SvIOK_on(*svp);
a5f75d66 2569 SvIVX(*svp) = 1;
93a17b20
LW		 2570 SvSTASH(*svp) = (HV*)cop;
2571 }
2572 }
2573
11343788 2574 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2575}
2576
bbce6d69 2577/* "Introduce" my variables to visible status. */
2578U32
8ac85365 2579intro_my(void)
bbce6d69 2580{
2581 SV **svp;
2582 SV *sv;
2583 I32 i;
2584
2585 if (! min_intro_pending)
2586 return cop_seqmax;
2587
2588 svp = AvARRAY(comppad_name);
2589 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2590 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2591 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2592 SvNVX(sv) = (double)cop_seqmax;
2593 }
2594 }
2595 min_intro_pending = 0;
2596 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2597 return cop_seqmax++;
2598}
2599
79072805 2600OP *
8ac85365 2601newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2602{
11343788 2603 dTHR;
79072805 2604 LOGOP *logop;
11343788 2605 OP *o;
79072805 2606
a0d0e21e
LW		 2607 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2608 return newBINOP(type, flags, scalar(first), scalar(other));
2609
8990e307 2610 scalarboolean(first);
79072805
LW		 2611 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2612 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2613 if (type == OP_AND || type == OP_OR) {
2614 if (type == OP_AND)
2615 type = OP_OR;
2616 else
2617 type = OP_AND;
11343788
MB		 2618 o = first;
2619 first = cUNOPo->op_first;
2620 if (o->op_next)
2621 first->op_next = o->op_next;
2622 cUNOPo->op_first = Nullop;
2623 op_free(o);
79072805
LW		 2624 }
2625 }
2626 if (first->op_type == OP_CONST) {
93a17b20 2627 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2628 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2629 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2630 op_free(first);
2631 return other;
2632 }
2633 else {
2634 op_free(other);
2635 return first;
2636 }
2637 }
2638 else if (first->op_type == OP_WANTARRAY) {
2639 if (type == OP_AND)
2640 list(other);
2641 else
2642 scalar(other);
2643 }
a6006777 2644 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2645 OP *k1 = ((UNOP*)first)->op_first;
2646 OP *k2 = k1->op_sibling;
2647 OPCODE warnop = 0;
2648 switch (first->op_type)
2649 {
2650 case OP_NULL:
2651 if (k2 && k2->op_type == OP_READLINE
2652 && (k2->op_flags & OPf_STACKED)
2653 && (k1->op_type == OP_RV2SV || k1->op_type == OP_PADSV))
2654 warnop = k2->op_type;
2655 break;
2656
2657 case OP_SASSIGN:
68dc0745 2658 if (k1->op_type == OP_READDIR
2659 || k1->op_type == OP_GLOB
2660 || k1->op_type == OP_EACH)
a6006777 2661 warnop = k1->op_type;
2662 break;
2663 }
8ebc5c01 2664 if (warnop) {
2665 line_t oldline = curcop->cop_line;
2666 curcop->cop_line = copline;
68dc0745 2667 warn("Value of %s%s can be \"0\"; test with defined()",
2668 op_desc[warnop],
2669 ((warnop == OP_READLINE || warnop == OP_GLOB)
2670 ? " construct" : "() operator"));
2671 curcop->cop_line = oldline;
8ebc5c01 2672 }
a6006777 2673 }
79072805
LW		 2674
2675 if (!other)
2676 return first;
2677
a0d0e21e
LW		 2678 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2679 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2680
79072805
LW		 2681 Newz(1101, logop, 1, LOGOP);
2682
2683 logop->op_type = type;
2684 logop->op_ppaddr = ppaddr[type];
2685 logop->op_first = first;
2686 logop->op_flags = flags | OPf_KIDS;
2687 logop->op_other = LINKLIST(other);
c07a80fd 2688 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2689
2690 /* establish postfix order */
2691 logop->op_next = LINKLIST(first);
2692 first->op_next = (OP*)logop;
2693 first->op_sibling = other;
2694
11343788
MB		 2695 o = newUNOP(OP_NULL, 0, (OP*)logop);
2696 other->op_next = o;
79072805 2697
11343788 2698 return o;
79072805
LW		 2699}
2700
2701OP *
8ac85365 2702newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2703{
11343788 2704 dTHR;
79072805 2705 CONDOP *condop;
11343788 2706 OP *o;
79072805 2707
b1cb66bf 2708 if (!falseop)
2709 return newLOGOP(OP_AND, 0, first, trueop);
2710 if (!trueop)
2711 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2712
8990e307 2713 scalarboolean(first);
79072805
LW		 2714 if (first->op_type == OP_CONST) {
2715 if (SvTRUE(((SVOP*)first)->op_sv)) {
2716 op_free(first);
b1cb66bf 2717 op_free(falseop);
2718 return trueop;
79072805
LW		 2719 }
2720 else {
2721 op_free(first);
b1cb66bf 2722 op_free(trueop);
2723 return falseop;
79072805
LW		 2724 }
2725 }
2726 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2727 list(trueop);
2728 scalar(falseop);
79072805
LW		 2729 }
2730 Newz(1101, condop, 1, CONDOP);
2731
2732 condop->op_type = OP_COND_EXPR;
2733 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2734 condop->op_first = first;
2735 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2736 condop->op_true = LINKLIST(trueop);
2737 condop->op_false = LINKLIST(falseop);
c07a80fd 2738 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2739
2740 /* establish postfix order */
2741 condop->op_next = LINKLIST(first);
2742 first->op_next = (OP*)condop;
2743
b1cb66bf 2744 first->op_sibling = trueop;
2745 trueop->op_sibling = falseop;
11343788 2746 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2747
5dc0d613
MB		 2748 trueop->op_next = o;
2749 falseop->op_next = o;
79072805 2750
11343788 2751 return o;
79072805
LW		 2752}
2753
2754OP *
8ac85365 2755newRANGE(I32 flags, OP *left, OP *right)
79072805 2756{
b35b2403 2757 dTHR;
79072805
LW		 2758 CONDOP *condop;
2759 OP *flip;
2760 OP *flop;
11343788 2761 OP *o;
79072805
LW		 2762
2763 Newz(1101, condop, 1, CONDOP);
2764
2765 condop->op_type = OP_RANGE;
2766 condop->op_ppaddr = ppaddr[OP_RANGE];
2767 condop->op_first = left;
2768 condop->op_flags = OPf_KIDS;
2769 condop->op_true = LINKLIST(left);
2770 condop->op_false = LINKLIST(right);
c07a80fd 2771 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2772
2773 left->op_sibling = right;
2774
2775 condop->op_next = (OP*)condop;
2776 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2777 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2778 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2779 linklist(flop);
2780
2781 left->op_next = flip;
2782 right->op_next = flop;
2783
ed6116ce 2784 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2785 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2786 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2787 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2788
2789 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2790 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2791
11343788 2792 flip->op_next = o;
79072805 2793 if (!flip->op_private || !flop->op_private)
11343788 2794 linklist(o); /* blow off optimizer unless constant */
79072805 2795
11343788 2796 return o;
79072805
LW		 2797}
2798
2799OP *
8ac85365 2800newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2801{
11343788 2802 dTHR;
463ee0b2 2803 OP* listop;
11343788 2804 OP* o;
463ee0b2 2805 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2806 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2807
463ee0b2
LW		 2808 if (expr) {
2809 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2810 return block; /* do {} while 0 does once */
fb73857a 2811 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2812 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2813 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2814 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
774d564b 2815 }
463ee0b2 2816 }
93a17b20 2817
8990e307 2818 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
11343788 2819 o = newLOGOP(OP_AND, 0, expr, listop);
463ee0b2 2820
11343788 2821 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2822
11343788
MB		 2823 if (once && o != listop)
2824 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2825
11343788
MB		 2826 if (o == listop)
2827 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2828
11343788
MB		 2829 o->op_flags |= flags;
2830 o = scope(o);
2831 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2832 return o;
79072805
LW		 2833}
2834
2835OP *
8ac85365 2836newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2837{
11343788 2838 dTHR;
79072805
LW		 2839 OP *redo;
2840 OP *next = 0;
2841 OP *listop;
11343788 2842 OP *o;
79072805
LW		 2843 OP *condop;
2844
fb73857a 2845 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2846 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2847 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2848 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
748a9306 2849 }
79072805
LW		 2850
2851 if (!block)
2852 block = newOP(OP_NULL, 0);
2853
2854 if (cont)
2855 next = LINKLIST(cont);
fb73857a 2856 if (expr) {
79072805 2857 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2858 if ((line_t)whileline != NOLINE) {
2859 copline = whileline;
2860 cont = append_elem(OP_LINESEQ, cont,
2861 newSTATEOP(0, Nullch, Nullop));
2862 }
2863 }
79072805 2864
463ee0b2 2865 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2866 redo = LINKLIST(listop);
2867
2868 if (expr) {
11343788
MB		 2869 o = newLOGOP(OP_AND, 0, expr, scalar(listop));
2870 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2871 op_free(expr); /* oops, it's a while (0) */
463ee0b2
LW		 2872 op_free((OP*)loop);
2873 return Nullop; /* (listop already freed by newLOGOP) */
2874 }
aeea060c 2875 ((LISTOP*)listop)->op_last->op_next = condop =
11343788 2876 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2877 if (!next)
2878 next = condop;
2879 }
2880 else
11343788 2881 o = listop;
79072805
LW		 2882
2883 if (!loop) {
2884 Newz(1101,loop,1,LOOP);
2885 loop->op_type = OP_ENTERLOOP;
2886 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2887 loop->op_private = 0;
2888 loop->op_next = (OP*)loop;
2889 }
2890
11343788 2891 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 2892
2893 loop->op_redoop = redo;
11343788 2894 loop->op_lastop = o;
79072805
LW		 2895
2896 if (next)
2897 loop->op_nextop = next;
2898 else
11343788 2899 loop->op_nextop = o;
79072805 2900
11343788
MB		 2901 o->op_flags |= flags;
2902 o->op_private |= (flags >> 8);
2903 return o;
79072805
LW		 2904}
2905
2906OP *
a0d0e21e 2907#ifndef CAN_PROTOTYPE
79072805
LW		 2908newFOROP(flags,label,forline,sv,expr,block,cont)
2909I32 flags;
2910char *label;
2911line_t forline;
2912OP* sv;
2913OP* expr;
2914OP*block;
2915OP*cont;
8990e307
LW		 2916#else
2917newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
a0d0e21e 2918#endif /* CAN_PROTOTYPE */
79072805
LW		 2919{
2920 LOOP *loop;
fb73857a 2921 OP *wop;
85e6fe83 2922 int padoff = 0;
4633a7c4 2923 I32 iterflags = 0;
79072805 2924
79072805 2925 if (sv) {
85e6fe83 2926 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 2927 sv->op_type = OP_RV2GV;
2928 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 2929 }
85e6fe83
LW		 2930 else if (sv->op_type == OP_PADSV) { /* private variable */
2931 padoff = sv->op_targ;
2932 op_free(sv);
2933 sv = Nullop;
2934 }
54b9620d
MB		 2935 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
2936 padoff = sv->op_targ;
2937 iterflags |= OPf_SPECIAL;
2938 op_free(sv);
2939 sv = Nullop;
2940 }
79072805 2941 else
c07a80fd 2942 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 2943 }
2944 else {
54b9620d
MB		 2945#ifdef USE_THREADS
2946 padoff = find_threadsv("_");
2947 iterflags |= OPf_SPECIAL;
2948#else
79072805 2949 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 2950#endif
79072805 2951 }
5f05dabc 2952 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
4633a7c4
LW		 2953 expr = scalar(ref(expr, OP_ITER));
2954 iterflags |= OPf_STACKED;
2955 }
2956 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
a0d0e21e
LW		 2957 append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART),
2958 scalar(sv))));
85e6fe83
LW		 2959 assert(!loop->op_next);
2960 Renew(loop, 1, LOOP);
2961 loop->op_targ = padoff;
fb73857a 2962 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
2963 copline = forline;
2964 return newSTATEOP(0, label, wop);
79072805
LW		 2965}
2966
8990e307 2967OP*
8ac85365 2968newLOOPEX(I32 type, OP *label)
8990e307 2969{
11343788
MB		 2970 dTHR;
2971 OP *o;
8990e307 2972 if (type != OP_GOTO || label->op_type == OP_CONST) {
11343788 2973 o = newPVOP(type, 0, savepv(
a0d0e21e
LW		 2974 label->op_type == OP_CONST
2975 ? SvPVx(((SVOP*)label)->op_sv, na)
2976 : "" ));
8990e307
LW		 2977 op_free(label);
2978 }
2979 else {
a0d0e21e
LW		 2980 if (label->op_type == OP_ENTERSUB)
2981 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 2982 o = newUNOP(type, OPf_STACKED, label);
8990e307 2983 }
85e6fe83 2984 hints |= HINT_BLOCK_SCOPE;
11343788 2985 return o;
8990e307
LW		 2986}
2987
79072805 2988void
8ac85365 2989cv_undef(CV *cv)
79072805 2990{
11343788
MB		 2991 dTHR;
2992#ifdef USE_THREADS
e858de61
MB		 2993 if (CvMUTEXP(cv)) {
2994 MUTEX_DESTROY(CvMUTEXP(cv));
2995 Safefree(CvMUTEXP(cv));
2996 CvMUTEXP(cv) = 0;
2997 }
11343788
MB		 2998#endif /* USE_THREADS */
2999
a0d0e21e 3000 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3001#ifdef USE_THREADS
3002 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3003 croak("Can't undef active subroutine");
3004#else
a0d0e21e
LW		 3005 if (CvDEPTH(cv))
3006 croak("Can't undef active subroutine");
11343788 3007#endif /* USE_THREADS */
8990e307 3008 ENTER;
a0d0e21e
LW		 3009
3010 SAVESPTR(curpad);
3011 curpad = 0;
3012
a5f75d66 3013 if (!CvCLONED(cv))
748a9306 3014 op_free(CvROOT(cv));
79072805 3015 CvROOT(cv) = Nullop;
8990e307 3016 LEAVE;
79072805 3017 }
1d5db326 3018 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3019 CvFLAGS(cv) = 0;
8e07c86e
AD		 3020 SvREFCNT_dec(CvGV(cv));
3021 CvGV(cv) = Nullgv;
3022 SvREFCNT_dec(CvOUTSIDE(cv));
3023 CvOUTSIDE(cv) = Nullcv;
3024 if (CvPADLIST(cv)) {
8ebc5c01 3025 /* may be during global destruction */
3026 if (SvREFCNT(CvPADLIST(cv))) {
3027 I32 i = AvFILL(CvPADLIST(cv));
3028 while (i >= 0) {
3029 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3030 SV* sv = svp ? *svp : Nullsv;
3031 if (!sv)
3032 continue;
3033 if (sv == (SV*)comppad_name)
3034 comppad_name = Nullav;
3035 else if (sv == (SV*)comppad) {
3036 comppad = Nullav;
3037 curpad = Null(SV**);
3038 }
3039 SvREFCNT_dec(sv);
8ebc5c01 3040 }
3041 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3042 }
8e07c86e
AD		 3043 CvPADLIST(cv) = Nullav;
3044 }
79072805
LW		 3045}
3046
5f05dabc 3047#ifdef DEBUG_CLOSURES
3048static void
3049cv_dump(cv)
3050CV* cv;
3051{
3052 CV *outside = CvOUTSIDE(cv);
3053 AV* padlist = CvPADLIST(cv);
4fdae800 3054 AV* pad_name;
3055 AV* pad;
3056 SV** pname;
3057 SV** ppad;
5f05dabc 3058 I32 ix;
3059
fb73857a 3060 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3061 cv,
3062 (CvANON(cv) ? "ANON"
3063 : (cv == main_cv) ? "MAIN"
07055b4c 3064 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3065 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3066 outside,
3067 (!outside ? "null"
3068 : CvANON(outside) ? "ANON"
3069 : (outside == main_cv) ? "MAIN"
07055b4c 3070 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3071 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3072
4fdae800 3073 if (!padlist)
3074 return;
3075
3076 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3077 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3078 pname = AvARRAY(pad_name);
3079 ppad = AvARRAY(pad);
3080
9607fc9c 3081 for (ix = 1; ix <= AvFILL(pad_name); ix++) {
5f05dabc 3082 if (SvPOK(pname[ix]))
fb73857a 3083 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3084 ix, ppad[ix],
3085 SvFAKE(pname[ix]) ? "FAKE " : "",
3086 SvPVX(pname[ix]),
ab50184a
CS		 3087 (long)I_32(SvNVX(pname[ix])),
3088 (long)SvIVX(pname[ix]));
5f05dabc 3089 }
3090}
3091#endif /* DEBUG_CLOSURES */
3092
3093static CV *
8ac85365 3094cv_clone2(CV *proto, CV *outside)
748a9306 3095{
11343788 3096 dTHR;
748a9306
LW		 3097 AV* av;
3098 I32 ix;
3099 AV* protopadlist = CvPADLIST(proto);
3100 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3101 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3102 SV** pname = AvARRAY(protopad_name);
3103 SV** ppad = AvARRAY(protopad);
9607fc9c 3104 I32 fname = AvFILL(protopad_name);
3105 I32 fpad = AvFILL(protopad);
748a9306
LW		 3106 AV* comppadlist;
3107 CV* cv;
3108
07055b4c
CS		 3109 assert(!CvUNIQUE(proto));
3110
748a9306
LW		 3111 ENTER;
3112 SAVESPTR(curpad);
3113 SAVESPTR(comppad);
46fc3d4c 3114 SAVESPTR(comppad_name);
748a9306
LW		 3115 SAVESPTR(compcv);
3116
3117 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3118 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3119 CvCLONED_on(cv);
5f05dabc 3120 if (CvANON(proto))
3121 CvANON_on(cv);
748a9306 3122
11343788 3123#ifdef USE_THREADS
12ca11f6 3124 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3125 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3126 CvOWNER(cv) = 0;
3127#endif /* USE_THREADS */
748a9306 3128 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3129 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3130 CvSTASH(cv) = CvSTASH(proto);
3131 CvROOT(cv) = CvROOT(proto);
3132 CvSTART(cv) = CvSTART(proto);
5f05dabc 3133 if (outside)
3134 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3135
68dc0745 3136 if (SvPOK(proto))
3137 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3138
46fc3d4c 3139 comppad_name = newAV();
3140 for (ix = fname; ix >= 0; ix--)
3141 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3142
3143 comppad = newAV();
3144
3145 comppadlist = newAV();
3146 AvREAL_off(comppadlist);
46fc3d4c 3147 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3148 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3149 CvPADLIST(cv) = comppadlist;
5f05dabc 3150 av_fill(comppad, AvFILL(protopad));
748a9306
LW		 3151 curpad = AvARRAY(comppad);
3152
3153 av = newAV(); /* will be @_ */
3154 av_extend(av, 0);
3155 av_store(comppad, 0, (SV*)av);
3156 AvFLAGS(av) = AVf_REIFY;
3157
9607fc9c 3158 for (ix = fpad; ix > 0; ix--) {
3159 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3160 if (namesv && namesv != &sv_undef) {
3161 char *name = SvPVX(namesv); /* XXX */
3162 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3163 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3164 CvOUTSIDE(cv), cxstack_ix);
3165 if (!off)
3166 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3167 else if (off != ix)
748a9306
LW		 3168 croak("panic: cv_clone: %s", name);
3169 }
3170 else { /* our own lexical */
aa689395 3171 SV* sv;
5f05dabc 3172 if (*name == '&') {
3173 /* anon code -- we'll come back for it */
3174 sv = SvREFCNT_inc(ppad[ix]);
3175 }
3176 else if (*name == '@')
3177 sv = (SV*)newAV();
748a9306 3178 else if (*name == '%')
5f05dabc 3179 sv = (SV*)newHV();
748a9306 3180 else
5f05dabc 3181 sv = NEWSV(0,0);
3182 if (!SvPADBUSY(sv))
3183 SvPADMY_on(sv);
3184 curpad[ix] = sv;
748a9306
LW		 3185 }
3186 }
3187 else {
aa689395 3188 SV* sv = NEWSV(0,0);
748a9306 3189 SvPADTMP_on(sv);
5f05dabc 3190 curpad[ix] = sv;
748a9306
LW		 3191 }
3192 }
3193
5f05dabc 3194 /* Now that vars are all in place, clone nested closures. */
3195
9607fc9c 3196 for (ix = fpad; ix > 0; ix--) {
3197 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3198 if (namesv
3199 && namesv != &sv_undef
3200 && !(SvFLAGS(namesv) & SVf_FAKE)
3201 && *SvPVX(namesv) == '&'
5f05dabc 3202 && CvCLONE(ppad[ix]))
3203 {
3204 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3205 SvREFCNT_dec(ppad[ix]);
3206 CvCLONE_on(kid);
3207 SvPADMY_on(kid);
3208 curpad[ix] = (SV*)kid;
748a9306
LW		 3209 }
3210 }
3211
5f05dabc 3212#ifdef DEBUG_CLOSURES
ab50184a
CS		 3213 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3214 cv_dump(outside);
3215 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3216 cv_dump(proto);
ab50184a 3217 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3218 cv_dump(cv);
3219#endif
3220
748a9306
LW		 3221 LEAVE;
3222 return cv;
3223}
3224
3225CV *
8ac85365 3226cv_clone(CV *proto)
5f05dabc 3227{
3228 return cv_clone2(proto, CvOUTSIDE(proto));
3229}
3230
3fe9a6f1 3231void
8ac85365 3232cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3233{
3234 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3235 SV* msg = sv_newmortal();
3fe9a6f1 3236 SV* name = Nullsv;
3237
3238 if (gv)
46fc3d4c 3239 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3240 sv_setpv(msg, "Prototype mismatch:");
3241 if (name)
fc36a67e 3242 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3243 if (SvPOK(cv))
46fc3d4c 3244 sv_catpvf(msg, " (%s)", SvPVX(cv));
3245 sv_catpv(msg, " vs ");
3246 if (p)
3247 sv_catpvf(msg, "(%s)", p);
3248 else
3249 sv_catpv(msg, "none");
fc36a67e 3250 warn("%_", msg);
3fe9a6f1 3251 }
3252}
3253
760ac839 3254SV *
8ac85365 3255cv_const_sv(CV *cv)
760ac839
LW		 3256{
3257 OP *o;
54310121 3258 SV *sv;
aeea060c 3259
54310121 3260 if (!cv || !SvPOK(cv) || SvCUR(cv))
3261 return Nullsv;
760ac839 3262
54310121 3263 sv = Nullsv;
3264 for (o = CvSTART(cv); o; o = o->op_next) {
3265 OPCODE type = o->op_type;
3266
3267 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3268 continue;
3269 if (type == OP_LEAVESUB || type == OP_RETURN)
3270 break;
3271 if (sv)
3272 return Nullsv;
3273 if (type == OP_CONST)
5dc0d613 3274 sv = cSVOPo->op_sv;
54310121 3275 else if (type == OP_PADSV) {
e858de61
MB		 3276 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3277 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3278 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3279 return Nullsv;
760ac839 3280 }
54310121 3281 else
3282 return Nullsv;
760ac839 3283 }
5aabfad6 3284 if (sv)
3285 SvREADONLY_on(sv);
760ac839
LW		 3286 return sv;
3287}
3288
748a9306 3289CV *
8ac85365 3290newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3291{
11343788 3292 dTHR;
5dc0d613 3293 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
44a8e56a 3294 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
3fe9a6f1 3295 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
79072805 3296 register CV *cv;
a0d0e21e 3297 I32 ix;
79072805 3298
11343788 3299 if (o)
5dc0d613 3300 SAVEFREEOP(o);
3fe9a6f1 3301 if (proto)
3302 SAVEFREEOP(proto);
3303
68dc0745 3304 if (!name || GvCVGEN(gv))
3305 cv = Nullcv;
3306 else if (cv = GvCV(gv)) {
3fe9a6f1 3307 cv_ckproto(cv, gv, ps);
68dc0745 3308 /* already defined (or promised)? */
3309 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3310 SV* const_sv;
aa689395 3311 if (!block) {
3312 /* just a "sub foo;" when &foo is already defined */
3313 SAVEFREESV(compcv);
3314 goto done;
3315 }
7bac28a0 3316 /* ahem, death to those who redefine active sort subs */
3317 if (curstack == sortstack && sortcop == CvSTART(cv))
3318 croak("Can't redefine active sort subroutine %s", name);
68dc0745 3319 const_sv = cv_const_sv(cv);
44a8e56a 3320 if (const_sv || dowarn) {
79072805 3321 line_t oldline = curcop->cop_line;
79072805 3322 curcop->cop_line = copline;
760ac839 3323 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3324 : "Subroutine %s redefined", name);
79072805
LW		 3325 curcop->cop_line = oldline;
3326 }
8990e307 3327 SvREFCNT_dec(cv);
68dc0745 3328 cv = Nullcv;
79072805
LW		 3329 }
3330 }
a0d0e21e 3331 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3332 cv_undef(cv);
44a8e56a 3333 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3334 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3335 CvOUTSIDE(compcv) = 0;
748a9306 3336 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3337 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3338 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3339 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3340 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3341 }
3342 else {
748a9306 3343 cv = compcv;
44a8e56a 3344 if (name) {
3345 GvCV(gv) = cv;
3346 GvCVGEN(gv) = 0;
3347 sub_generation++;
3348 }
a0d0e21e 3349 }
44a8e56a 3350 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3351 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3352 CvSTASH(cv) = curstash;
11343788
MB		 3353#ifdef USE_THREADS
3354 CvOWNER(cv) = 0;
12ca11f6 3355 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3356 MUTEX_INIT(CvMUTEXP(cv));
11343788 3357#endif /* USE_THREADS */
8990e307 3358
3fe9a6f1 3359 if (ps)
3360 sv_setpv((SV*)cv, ps);
4633a7c4 3361
c07a80fd 3362 if (error_count) {
3363 op_free(block);
3364 block = Nullop;
68dc0745 3365 if (name) {
3366 char *s = strrchr(name, ':');
3367 s = s ? s+1 : name;
6d4c2119
CS		 3368 if (strEQ(s, "BEGIN")) {
3369 char *not_safe =
3370 "BEGIN not safe after errors--compilation aborted";
3371 if (in_eval & 4)
3372 croak(not_safe);
3373 else {
3374 /* force display of errors found but not reported */
38a03e6e
MB		 3375 sv_catpv(ERRSV, not_safe);
3376 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3377 }
3378 }
68dc0745 3379 }
c07a80fd 3380 }
a0d0e21e 3381 if (!block) {
a0d0e21e
LW		 3382 copline = NOLINE;
3383 LEAVE_SCOPE(floor);
3384 return cv;
3385 }
3386
54310121 3387 if (AvFILL(comppad_name) < AvFILL(comppad))
3388 av_store(comppad_name, AvFILL(comppad), Nullsv);
a0d0e21e 3389
54310121 3390 if (CvCLONE(cv)) {
3391 SV **namep = AvARRAY(comppad_name);
3392 for (ix = AvFILL(comppad); ix > 0; ix--) {
3393 SV *namesv;
3394
3395 if (SvIMMORTAL(curpad[ix]))
3396 continue;
3397 /*
3398 * The only things that a clonable function needs in its
3399 * pad are references to outer lexicals and anonymous subs.
3400 * The rest are created anew during cloning.
3401 */
3402 if (!((namesv = namep[ix]) != Nullsv &&
3403 namesv != &sv_undef &&
3404 (SvFAKE(namesv) ||
3405 *SvPVX(namesv) == '&')))
3406 {
3407 SvREFCNT_dec(curpad[ix]);
3408 curpad[ix] = Nullsv;
3409 }
3410 }
a0d0e21e 3411 }
54310121 3412 else {
3413 AV *av = newAV(); /* Will be @_ */
3414 av_extend(av, 0);
3415 av_store(comppad, 0, (SV*)av);
3416 AvFLAGS(av) = AVf_REIFY;
79072805 3417
54310121 3418 for (ix = AvFILL(comppad); ix > 0; ix--) {
3419 if (SvIMMORTAL(curpad[ix]))
3420 continue;
3421 if (!SvPADMY(curpad[ix]))
3422 SvPADTMP_on(curpad[ix]);
3423 }
3424 }
79072805 3425
a0d0e21e 3426 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3427 CvSTART(cv) = LINKLIST(CvROOT(cv));
3428 CvROOT(cv)->op_next = 0;
3429 peep(CvSTART(cv));
93a17b20 3430
44a8e56a 3431 if (name) {
3432 char *s;
3433
84902520 3434 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3435 SV *sv = NEWSV(0,0);
44a8e56a 3436 SV *tmpstr = sv_newmortal();
3437 static GV *db_postponed;
3438 CV *cv;
3439 HV *hv;
3440
977336f5
GS		 3441 sv_setpvf(sv, "%_:%ld-%ld",
3442 GvSV(curcop->cop_filegv),
3443 (long)subline, (long)curcop->cop_line);
44a8e56a 3444 gv_efullname3(tmpstr, gv, Nullch);
3445 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
3446 if (!db_postponed) {
6bbcb22c 3447 db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3448 }
3449 hv = GvHVn(db_postponed);
9607fc9c 3450 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3451 && (cv = GvCV(db_postponed))) {
44a8e56a 3452 dSP;
3453 PUSHMARK(sp);
3454 XPUSHs(tmpstr);
3455 PUTBACK;
3456 perl_call_sv((SV*)cv, G_DISCARD);
3457 }
3458 }
79072805 3459
44a8e56a 3460 if ((s = strrchr(name,':')))
28757baa 3461 s++;
3462 else
3463 s = name;
68dc0745 3464 if (strEQ(s, "BEGIN")) {
2ae324a7 3465 I32 oldscope = scopestack_ix;
28757baa 3466 ENTER;
3467 SAVESPTR(compiling.cop_filegv);
3468 SAVEI16(compiling.cop_line);
3469 SAVEI32(perldb);
3470 save_svref(&rs);
3471 sv_setsv(rs, nrs);
3472
3473 if (!beginav)
3474 beginav = newAV();
3475 DEBUG_x( dump_sub(gv) );
3476 av_push(beginav, (SV *)cv);
3477 GvCV(gv) = 0;
68dc0745 3478 call_list(oldscope, beginav);
a6006777 3479
28757baa 3480 curcop = &compiling;
3481 LEAVE;
3482 }
3483 else if (strEQ(s, "END") && !error_count) {
3484 if (!endav)
3485 endav = newAV();
3486 av_unshift(endav, 1);
3487 av_store(endav, 0, (SV *)cv);
3488 GvCV(gv) = 0;
3489 }
7d07dbc2
MB		 3490 else if (strEQ(s, "INIT") && !error_count) {
3491 if (!initav)
3492 initav = newAV();
3493 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3494 }
79072805 3495 }
a6006777 3496
aa689395 3497 done:
79072805 3498 copline = NOLINE;
8990e307 3499 LEAVE_SCOPE(floor);
a0d0e21e 3500 return cv;
79072805
LW		 3501}
3502
57d3b86d 3503CV *
aeea060c 3504newXS(char *name, void (*subaddr) (CV *), char *filename)
a0d0e21e 3505{
11343788 3506 dTHR;
44a8e56a 3507 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3508 register CV *cv;
44a8e56a 3509
3510 if (cv = (name ? GvCV(gv) : Nullcv)) {
3511 if (GvCVGEN(gv)) {
3512 /* just a cached method */
3513 SvREFCNT_dec(cv);
3514 cv = 0;
3515 }
3516 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3517 /* already defined (or promised) */
a0d0e21e
LW		 3518 if (dowarn) {
3519 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3520 curcop->cop_line = copline;
3521 warn("Subroutine %s redefined",name);
3522 curcop->cop_line = oldline;
3523 }
3524 SvREFCNT_dec(cv);
3525 cv = 0;
79072805 3526 }
79072805 3527 }
44a8e56a 3528
3529 if (cv) /* must reuse cv if autoloaded */
3530 cv_undef(cv);
a0d0e21e
LW		 3531 else {
3532 cv = (CV*)NEWSV(1105,0);
3533 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3534 if (name) {
3535 GvCV(gv) = cv;
3536 GvCVGEN(gv) = 0;
3537 sub_generation++;
3538 }
a0d0e21e 3539 }
5196be3e 3540 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3541#ifdef USE_THREADS
12ca11f6 3542 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3543 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3544 CvOWNER(cv) = 0;
3545#endif /* USE_THREADS */
79072805 3546 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3547 CvXSUB(cv) = subaddr;
44a8e56a 3548
28757baa 3549 if (name) {
3550 char *s = strrchr(name,':');
3551 if (s)
3552 s++;
3553 else
3554 s = name;
3555 if (strEQ(s, "BEGIN")) {
3556 if (!beginav)
3557 beginav = newAV();
44a8e56a 3558 av_push(beginav, (SV *)cv);
3559 GvCV(gv) = 0;
28757baa 3560 }
3561 else if (strEQ(s, "END")) {
3562 if (!endav)
3563 endav = newAV();
3564 av_unshift(endav, 1);
44a8e56a 3565 av_store(endav, 0, (SV *)cv);
3566 GvCV(gv) = 0;
28757baa 3567 }
7d07dbc2
MB		 3568 else if (strEQ(s, "INIT")) {
3569 if (!initav)
3570 initav = newAV();
3571 av_push(initav, (SV *)cv);
ae77835f 3572 }
28757baa 3573 }
8990e307 3574 else
a5f75d66 3575 CvANON_on(cv);
44a8e56a 3576
a0d0e21e 3577 return cv;
79072805
LW		 3578}
3579
3580void
8ac85365 3581newFORM(I32 floor, OP *o, OP *block)
79072805 3582{
11343788 3583 dTHR;
79072805
LW		 3584 register CV *cv;
3585 char *name;
3586 GV *gv;
a0d0e21e 3587 I32 ix;
79072805 3588
11343788
MB		 3589 if (o)
3590 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3591 else
3592 name = "STDOUT";
85e6fe83 3593 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3594 GvMULTI_on(gv);
79072805
LW		 3595 if (cv = GvFORM(gv)) {
3596 if (dowarn) {
3597 line_t oldline = curcop->cop_line;
3598
3599 curcop->cop_line = copline;
3600 warn("Format %s redefined",name);
3601 curcop->cop_line = oldline;
3602 }
8990e307 3603 SvREFCNT_dec(cv);
79072805 3604 }
748a9306 3605 cv = compcv;
79072805 3606 GvFORM(gv) = cv;
44a8e56a 3607 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3608 CvFILEGV(cv) = curcop->cop_filegv;
3609
a0d0e21e 3610 for (ix = AvFILL(comppad); ix > 0; ix--) {
44a8e56a 3611 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3612 SvPADTMP_on(curpad[ix]);
3613 }
3614
79072805
LW		 3615 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3616 CvSTART(cv) = LINKLIST(CvROOT(cv));
3617 CvROOT(cv)->op_next = 0;
3618 peep(CvSTART(cv));
11343788 3619 op_free(o);
79072805 3620 copline = NOLINE;
8990e307 3621 LEAVE_SCOPE(floor);
79072805
LW		 3622}
3623
3624OP *
8ac85365 3625newANONLIST(OP *o)
79072805 3626{
93a17b20 3627 return newUNOP(OP_REFGEN, 0,
11343788 3628 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3629}
3630
3631OP *
8ac85365 3632newANONHASH(OP *o)
79072805 3633{
93a17b20 3634 return newUNOP(OP_REFGEN, 0,
11343788 3635 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3636}
3637
3638OP *
8ac85365 3639newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3640{
3641 return newUNOP(OP_REFGEN, 0,
4633a7c4 3642 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3643}
3644
3645OP *
8ac85365 3646oopsAV(OP *o)
79072805 3647{
ed6116ce
LW		 3648 switch (o->op_type) {
3649 case OP_PADSV:
3650 o->op_type = OP_PADAV;
3651 o->op_ppaddr = ppaddr[OP_PADAV];
3652 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3653
3654 case OP_RV2SV:
79072805
LW		 3655 o->op_type = OP_RV2AV;
3656 o->op_ppaddr = ppaddr[OP_RV2AV];
3657 ref(o, OP_RV2AV);
ed6116ce
LW		 3658 break;
3659
3660 default:
79072805 3661 warn("oops: oopsAV");
ed6116ce
LW		 3662 break;
3663 }
79072805
LW		 3664 return o;
3665}
3666
3667OP *
8ac85365 3668oopsHV(OP *o)
79072805 3669{
ed6116ce
LW		 3670 switch (o->op_type) {
3671 case OP_PADSV:
3672 case OP_PADAV:
3673 o->op_type = OP_PADHV;
3674 o->op_ppaddr = ppaddr[OP_PADHV];
3675 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3676
3677 case OP_RV2SV:
3678 case OP_RV2AV:
79072805
LW		 3679 o->op_type = OP_RV2HV;
3680 o->op_ppaddr = ppaddr[OP_RV2HV];
3681 ref(o, OP_RV2HV);
ed6116ce
LW		 3682 break;
3683
3684 default:
79072805 3685 warn("oops: oopsHV");
ed6116ce
LW		 3686 break;
3687 }
79072805
LW		 3688 return o;
3689}
3690
3691OP *
8ac85365 3692newAVREF(OP *o)
79072805 3693{
ed6116ce
LW		 3694 if (o->op_type == OP_PADANY) {
3695 o->op_type = OP_PADAV;
3696 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3697 return o;
ed6116ce 3698 }
79072805
LW		 3699 return newUNOP(OP_RV2AV, 0, scalar(o));
3700}
3701
3702OP *
8ac85365 3703newGVREF(I32 type, OP *o)
79072805 3704{
a0d0e21e
LW		 3705 if (type == OP_MAPSTART)
3706 return newUNOP(OP_NULL, 0, o);
748a9306 3707 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3708}
3709
3710OP *
8ac85365 3711newHVREF(OP *o)
79072805 3712{
ed6116ce
LW		 3713 if (o->op_type == OP_PADANY) {
3714 o->op_type = OP_PADHV;
3715 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3716 return o;
ed6116ce 3717 }
79072805
LW		 3718 return newUNOP(OP_RV2HV, 0, scalar(o));
3719}
3720
3721OP *
8ac85365 3722oopsCV(OP *o)
79072805 3723{
463ee0b2 3724 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3725 /* STUB */
3726 return o;
3727}
3728
3729OP *
8ac85365 3730newCVREF(I32 flags, OP *o)
79072805 3731{
c07a80fd 3732 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3733}
3734
3735OP *
8ac85365 3736newSVREF(OP *o)
79072805 3737{
ed6116ce
LW		 3738 if (o->op_type == OP_PADANY) {
3739 o->op_type = OP_PADSV;
3740 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3741 return o;
ed6116ce 3742 }
2faa37cc 3743 else if (o->op_type == OP_THREADSV)
a863c7d1 3744 return o;
79072805
LW		 3745 return newUNOP(OP_RV2SV, 0, scalar(o));
3746}
3747
3748/* Check routines. */
3749
3750OP *
8ac85365 3751ck_anoncode(OP *o)
5f05dabc 3752{
178c6305
CS		 3753 PADOFFSET ix;
3754 SV* name;
3755
3756 name = NEWSV(1106,0);
3757 sv_upgrade(name, SVt_PVNV);
3758 sv_setpvn(name, "&", 1);
3759 SvIVX(name) = -1;
3760 SvNVX(name) = 1;
5dc0d613 3761 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3762 av_store(comppad_name, ix, name);
5dc0d613
MB		 3763 av_store(comppad, ix, cSVOPo->op_sv);
3764 SvPADMY_on(cSVOPo->op_sv);
3765 cSVOPo->op_sv = Nullsv;
3766 cSVOPo->op_targ = ix;
3767 return o;
5f05dabc 3768}
3769
3770OP *
8ac85365 3771ck_bitop(OP *o)
55497cff 3772{
5dc0d613
MB		 3773 o->op_private = hints;
3774 return o;
55497cff 3775}
3776
3777OP *
8ac85365 3778ck_concat(OP *o)
79072805 3779{
11343788
MB		 3780 if (cUNOPo->op_first->op_type == OP_CONCAT)
3781 o->op_flags |= OPf_STACKED;
3782 return o;
79072805
LW		 3783}
3784
3785OP *
8ac85365 3786ck_spair(OP *o)
79072805 3787{
11343788 3788 if (o->op_flags & OPf_KIDS) {
79072805 3789 OP* newop;
a0d0e21e 3790 OP* kid;
5dc0d613
MB		 3791 OPCODE type = o->op_type;
3792 o = modkids(ck_fun(o), type);
11343788 3793 kid = cUNOPo->op_first;
a0d0e21e
LW		 3794 newop = kUNOP->op_first->op_sibling;
3795 if (newop &&
3796 (newop->op_sibling ||
3797 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3798 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3799 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3800
11343788 3801 return o;
a0d0e21e
LW		 3802 }
3803 op_free(kUNOP->op_first);
3804 kUNOP->op_first = newop;
3805 }
11343788
MB		 3806 o->op_ppaddr = ppaddr[++o->op_type];
3807 return ck_fun(o);
a0d0e21e
LW		 3808}
3809
3810OP *
8ac85365 3811ck_delete(OP *o)
a0d0e21e 3812{
11343788 3813 o = ck_fun(o);
5dc0d613 3814 o->op_private = 0;
11343788
MB		 3815 if (o->op_flags & OPf_KIDS) {
3816 OP *kid = cUNOPo->op_first;
5f05dabc 3817 if (kid->op_type == OP_HSLICE)
5dc0d613 3818 o->op_private |= OPpSLICE;
5f05dabc 3819 else if (kid->op_type != OP_HELEM)
3820 croak("%s argument is not a HASH element or slice",
5dc0d613 3821 op_desc[o->op_type]);
a0d0e21e 3822 null(kid);
79072805 3823 }
11343788 3824 return o;
79072805
LW		 3825}
3826
3827OP *
8ac85365 3828ck_eof(OP *o)
79072805 3829{
11343788 3830 I32 type = o->op_type;
79072805 3831
11343788
MB		 3832 if (o->op_flags & OPf_KIDS) {
3833 if (cLISTOPo->op_first->op_type == OP_STUB) {
3834 op_free(o);
3835 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 3836 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 3837 }
11343788 3838 return ck_fun(o);
79072805 3839 }
11343788 3840 return o;
79072805
LW		 3841}
3842
3843OP *
8ac85365 3844ck_eval(OP *o)
79072805 3845{
85e6fe83 3846 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 3847 if (o->op_flags & OPf_KIDS) {
3848 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 3849
93a17b20 3850 if (!kid) {
11343788
MB		 3851 o->op_flags &= ~OPf_KIDS;
3852 null(o);
79072805
LW		 3853 }
3854 else if (kid->op_type == OP_LINESEQ) {
3855 LOGOP *enter;
3856
11343788
MB		 3857 kid->op_next = o->op_next;
3858 cUNOPo->op_first = 0;
3859 op_free(o);
79072805
LW		 3860
3861 Newz(1101, enter, 1, LOGOP);
3862 enter->op_type = OP_ENTERTRY;
3863 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
3864 enter->op_private = 0;
3865
3866 /* establish postfix order */
3867 enter->op_next = (OP*)enter;
3868
11343788
MB		 3869 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
3870 o->op_type = OP_LEAVETRY;
3871 o->op_ppaddr = ppaddr[OP_LEAVETRY];
3872 enter->op_other = o;
3873 return o;
79072805
LW		 3874 }
3875 }
3876 else {
11343788 3877 op_free(o);
54b9620d 3878 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 3879 }
11343788
MB		 3880 o->op_targ = (PADOFFSET)hints;
3881 return o;
79072805
LW		 3882}
3883
3884OP *
8ac85365 3885ck_exec(OP *o)
79072805
LW		 3886{
3887 OP *kid;
11343788
MB		 3888 if (o->op_flags & OPf_STACKED) {
3889 o = ck_fun(o);
3890 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 3891 if (kid->op_type == OP_RV2GV)
3892 null(kid);
79072805 3893 }
463ee0b2 3894 else
11343788
MB		 3895 o = listkids(o);
3896 return o;
79072805
LW		 3897}
3898
3899OP *
8ac85365 3900ck_exists(OP *o)
5f05dabc 3901{
5196be3e
MB		 3902 o = ck_fun(o);
3903 if (o->op_flags & OPf_KIDS) {
3904 OP *kid = cUNOPo->op_first;
5f05dabc 3905 if (kid->op_type != OP_HELEM)
5196be3e 3906 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 3907 null(kid);
3908 }
5196be3e 3909 return o;
5f05dabc 3910}
3911
3912OP *
8ac85365 3913ck_gvconst(register OP *o)
79072805
LW		 3914{
3915 o = fold_constants(o);
3916 if (o->op_type == OP_CONST)
3917 o->op_type = OP_GV;
3918 return o;
3919}
3920
3921OP *
8ac85365 3922ck_rvconst(register OP *o)
79072805 3923{
11343788
MB		 3924 dTHR;
3925 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 3926
11343788 3927 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 3928 if (kid->op_type == OP_CONST) {
44a8e56a 3929 char *name;
3930 int iscv;
3931 GV *gv;
3932
3933 name = SvPV(kid->op_sv, na);
3934 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
3935 char *badthing = Nullch;
5dc0d613 3936 switch (o->op_type) {
44a8e56a 3937 case OP_RV2SV:
3938 badthing = "a SCALAR";
3939 break;
3940 case OP_RV2AV:
3941 badthing = "an ARRAY";
3942 break;
3943 case OP_RV2HV:
3944 badthing = "a HASH";
3945 break;
3946 }
3947 if (badthing)
3948 croak(
3949 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
3950 name, badthing);
3951 }
79072805 3952 kid->op_type = OP_GV;
5196be3e 3953 iscv = (o->op_type == OP_RV2CV) * 2;
a0d0e21e 3954 for (gv = 0; !gv; iscv++) {
748a9306
LW		 3955 /*
3956 * This is a little tricky. We only want to add the symbol if we
3957 * didn't add it in the lexer. Otherwise we get duplicate strict
3958 * warnings. But if we didn't add it in the lexer, we must at
3959 * least pretend like we wanted to add it even if it existed before,
3960 * or we get possible typo warnings. OPpCONST_ENTERED says
3961 * whether the lexer already added THIS instance of this symbol.
3962 */
44a8e56a 3963 gv = gv_fetchpv(name,
748a9306 3964 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 3965 iscv
3966 ? SVt_PVCV
11343788 3967 : o->op_type == OP_RV2SV
a0d0e21e 3968 ? SVt_PV
11343788 3969 : o->op_type == OP_RV2AV
a0d0e21e 3970 ? SVt_PVAV
11343788 3971 : o->op_type == OP_RV2HV
a0d0e21e
LW		 3972 ? SVt_PVHV
3973 : SVt_PVGV);
3974 }
adbc6bb1 3975 SvREFCNT_dec(kid->op_sv);
a0d0e21e 3976 kid->op_sv = SvREFCNT_inc(gv);
79072805 3977 }
11343788 3978 return o;
79072805
LW		 3979}
3980
3981OP *
8ac85365 3982ck_ftst(OP *o)
79072805 3983{
11343788
MB		 3984 dTHR;
3985 I32 type = o->op_type;
79072805 3986
11343788
MB		 3987 if (o->op_flags & OPf_REF)
3988 return o;
79072805 3989
11343788
MB		 3990 if (o->op_flags & OPf_KIDS) {
3991 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 3992
3993 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 3994 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 3995 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 3996 op_free(o);
79072805
LW		 3997 return newop;
3998 }
3999 }
4000 else {
11343788 4001 op_free(o);
79072805 4002 if (type == OP_FTTTY)
fb73857a 4003 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4004 SVt_PVIO));
79072805 4005 else
54b9620d 4006 return newUNOP(type, 0, newDEFSVOP());
79072805 4007 }
11343788 4008 return o;
79072805
LW		 4009}
4010
4011OP *
8ac85365 4012ck_fun(OP *o)
79072805 4013{
11343788 4014 dTHR;
79072805
LW		 4015 register OP *kid;
4016 OP **tokid;
4017 OP *sibl;
4018 I32 numargs = 0;
11343788 4019 int type = o->op_type;
a0d0e21e 4020 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4021
11343788 4022 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4023 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4024 oa &= ~OA_OPTIONAL;
4025 else
11343788 4026 return no_fh_allowed(o);
79072805
LW		 4027 }
4028
11343788
MB		 4029 if (o->op_flags & OPf_KIDS) {
4030 tokid = &cLISTOPo->op_first;
4031 kid = cLISTOPo->op_first;
8990e307
LW		 4032 if (kid->op_type == OP_PUSHMARK ||
4033 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4034 {
79072805
LW		 4035 tokid = &kid->op_sibling;
4036 kid = kid->op_sibling;
4037 }
a0d0e21e 4038 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4039 *tokid = kid = newDEFSVOP();
79072805
LW		 4040
4041 while (oa && kid) {
4042 numargs++;
4043 sibl = kid->op_sibling;
4044 switch (oa & 7) {
4045 case OA_SCALAR:
4046 scalar(kid);
4047 break;
4048 case OA_LIST:
4049 if (oa < 16) {
4050 kid = 0;
4051 continue;
4052 }
4053 else
4054 list(kid);
4055 break;
4056 case OA_AVREF:
4057 if (kid->op_type == OP_CONST &&
4058 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4059 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4060 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4061 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4062 if (dowarn)
ff0cee69 4063 warn("Array @%s missing the @ in argument %ld of %s()",
4064 name, (long)numargs, op_desc[type]);
79072805
LW		 4065 op_free(kid);
4066 kid = newop;
4067 kid->op_sibling = sibl;
4068 *tokid = kid;
4069 }
8990e307 4070 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4071 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4072 mod(kid, type);
79072805
LW		 4073 break;
4074 case OA_HVREF:
4075 if (kid->op_type == OP_CONST &&
4076 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4077 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4078 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4079 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4080 if (dowarn)
ff0cee69 4081 warn("Hash %%%s missing the %% in argument %ld of %s()",
4082 name, (long)numargs, op_desc[type]);
79072805
LW		 4083 op_free(kid);
4084 kid = newop;
4085 kid->op_sibling = sibl;
4086 *tokid = kid;
4087 }
8990e307 4088 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4089 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4090 mod(kid, type);
79072805
LW		 4091 break;
4092 case OA_CVREF:
4093 {
a0d0e21e 4094 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4095 kid->op_sibling = 0;
4096 linklist(kid);
4097 newop->op_next = newop;
4098 kid = newop;
4099 kid->op_sibling = sibl;
4100 *tokid = kid;
4101 }
4102 break;
4103 case OA_FILEREF:
4104 if (kid->op_type != OP_GV) {
4105 if (kid->op_type == OP_CONST &&
4106 (kid->op_private & OPpCONST_BARE)) {
4107 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4108 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4109 SVt_PVIO) );
79072805
LW		 4110 op_free(kid);
4111 kid = newop;
4112 }
4113 else {
4114 kid->op_sibling = 0;
4115 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4116 }
4117 kid->op_sibling = sibl;
4118 *tokid = kid;
4119 }
4120 scalar(kid);
4121 break;
4122 case OA_SCALARREF:
a0d0e21e 4123 mod(scalar(kid), type);
79072805
LW		 4124 break;
4125 }
4126 oa >>= 4;
4127 tokid = &kid->op_sibling;
4128 kid = kid->op_sibling;
4129 }
11343788 4130 o->op_private |= numargs;
79072805 4131 if (kid)
11343788
MB		 4132 return too_many_arguments(o,op_desc[o->op_type]);
4133 listkids(o);
79072805 4134 }
a0d0e21e 4135 else if (opargs[type] & OA_DEFGV) {
11343788 4136 op_free(o);
54b9620d 4137 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4138 }
4139
79072805
LW		 4140 if (oa) {
4141 while (oa & OA_OPTIONAL)
4142 oa >>= 4;
4143 if (oa && oa != OA_LIST)
11343788 4144 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4145 }
11343788 4146 return o;
79072805
LW		 4147}
4148
4149OP *
8ac85365 4150ck_glob(OP *o)
79072805 4151{
fb73857a 4152 GV *gv;
4153
1f2bfc8a 4154 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4155 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4156
4157 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4158 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4159
4160 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4161 static int glob_index;
4162
5196be3e 4163 append_elem(OP_GLOB, o,
46fc3d4c 4164 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4165 o->op_type = OP_LIST;
4166 o->op_ppaddr = ppaddr[OP_LIST];
4167 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4168 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4169 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4170 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4171 scalar(newUNOP(OP_RV2CV, 0,
4172 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4173 o = newUNOP(OP_NULL, 0, ck_subr(o));
4174 o->op_targ = OP_GLOB; /* hint at what it used to be */
4175 return o;
b1cb66bf 4176 }
4177 gv = newGVgen("main");
a0d0e21e 4178 gv_IOadd(gv);
11343788
MB		 4179 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4180 scalarkids(o);
4181 return ck_fun(o);
79072805
LW		 4182}
4183
4184OP *
8ac85365 4185ck_grep(OP *o)
79072805
LW		 4186{
4187 LOGOP *gwop;
4188 OP *kid;
11343788 4189 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4190
11343788 4191 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4192 Newz(1101, gwop, 1, LOGOP);
aeea060c 4193
11343788 4194 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4195 OP* k;
11343788
MB		 4196 o = ck_sort(o);
4197 kid = cLISTOPo->op_first->op_sibling;
4198 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4199 kid = k;
4200 }
4201 kid->op_next = (OP*)gwop;
11343788 4202 o->op_flags &= ~OPf_STACKED;
93a17b20 4203 }
11343788 4204 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4205 if (type == OP_MAPWHILE)
4206 list(kid);
4207 else
4208 scalar(kid);
11343788 4209 o = ck_fun(o);
79072805 4210 if (error_count)
11343788 4211 return o;
aeea060c 4212 kid = cLISTOPo->op_first->op_sibling;
79072805 4213 if (kid->op_type != OP_NULL)
463ee0b2 4214 croak("panic: ck_grep");
79072805
LW		 4215 kid = kUNOP->op_first;
4216
a0d0e21e
LW		 4217 gwop->op_type = type;
4218 gwop->op_ppaddr = ppaddr[type];
11343788 4219 gwop->op_first = listkids(o);
79072805
LW		 4220 gwop->op_flags |= OPf_KIDS;
4221 gwop->op_private = 1;
4222 gwop->op_other = LINKLIST(kid);
a0d0e21e 4223 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4224 kid->op_next = (OP*)gwop;
4225
11343788 4226 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4227 if (!kid || !kid->op_sibling)
11343788 4228 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4229 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4230 mod(kid, OP_GREPSTART);
4231
79072805
LW		 4232 return (OP*)gwop;
4233}
4234
4235OP *
8ac85365 4236ck_index(OP *o)
79072805 4237{
11343788
MB		 4238 if (o->op_flags & OPf_KIDS) {
4239 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4240 if (kid && kid->op_type == OP_CONST)
bbce6d69 4241 fbm_compile(((SVOP*)kid)->op_sv);
79072805 4242 }
11343788 4243 return ck_fun(o);
79072805
LW		 4244}
4245
4246OP *
8ac85365 4247ck_lengthconst(OP *o)
79072805
LW		 4248{
4249 /* XXX length optimization goes here */
11343788 4250 return ck_fun(o);
79072805
LW		 4251}
4252
4253OP *
8ac85365 4254ck_lfun(OP *o)
79072805 4255{
5dc0d613
MB		 4256 OPCODE type = o->op_type;
4257 return modkids(ck_fun(o), type);
79072805
LW		 4258}
4259
4260OP *
8ac85365 4261ck_rfun(OP *o)
8990e307 4262{
5dc0d613
MB		 4263 OPCODE type = o->op_type;
4264 return refkids(ck_fun(o), type);
8990e307
LW		 4265}
4266
4267OP *
8ac85365 4268ck_listiob(OP *o)
79072805
LW		 4269{
4270 register OP *kid;
aeea060c 4271
11343788 4272 kid = cLISTOPo->op_first;
79072805 4273 if (!kid) {
11343788
MB		 4274 o = force_list(o);
4275 kid = cLISTOPo->op_first;
79072805
LW		 4276 }
4277 if (kid->op_type == OP_PUSHMARK)
4278 kid = kid->op_sibling;
11343788 4279 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4280 kid = kid->op_sibling;
4281 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4282 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4283 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4284 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4285 cLISTOPo->op_first->op_sibling = kid;
4286 cLISTOPo->op_last = kid;
79072805
LW		 4287 kid = kid->op_sibling;
4288 }
4289 }
4290
4291 if (!kid)
54b9620d 4292 append_elem(o->op_type, o, newDEFSVOP());
79072805 4293
5dc0d613 4294 o = listkids(o);
bbce6d69 4295
5dc0d613 4296 o->op_private = 0;
36477c24 4297#ifdef USE_LOCALE
bbce6d69 4298 if (hints & HINT_LOCALE)
5dc0d613 4299 o->op_private |= OPpLOCALE;
bbce6d69 4300#endif
4301
5dc0d613 4302 return o;
bbce6d69 4303}
4304
4305OP *
8ac85365 4306ck_fun_locale(OP *o)
bbce6d69 4307{
5dc0d613 4308 o = ck_fun(o);
bbce6d69 4309
5dc0d613 4310 o->op_private = 0;
36477c24 4311#ifdef USE_LOCALE
bbce6d69 4312 if (hints & HINT_LOCALE)
5dc0d613 4313 o->op_private |= OPpLOCALE;
bbce6d69 4314#endif
4315
5dc0d613 4316 return o;
bbce6d69 4317}
4318
4319OP *
8ac85365 4320ck_scmp(OP *o)
bbce6d69 4321{
5dc0d613 4322 o->op_private = 0;
36477c24 4323#ifdef USE_LOCALE
bbce6d69 4324 if (hints & HINT_LOCALE)
5dc0d613 4325 o->op_private |= OPpLOCALE;
bbce6d69 4326#endif
36477c24 4327
5dc0d613 4328 return o;
79072805
LW		 4329}
4330
4331OP *
8ac85365 4332ck_match(OP *o)
79072805 4333{
5dc0d613 4334 o->op_private |= OPpRUNTIME;
11343788 4335 return o;
79072805
LW		 4336}
4337
4338OP *
8ac85365 4339ck_null(OP *o)
79072805 4340{
11343788 4341 return o;
79072805
LW		 4342}
4343
4344OP *
8ac85365 4345ck_repeat(OP *o)
79072805 4346{
11343788
MB		 4347 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4348 o->op_private |= OPpREPEAT_DOLIST;
4349 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4350 }
4351 else
11343788
MB		 4352 scalar(o);
4353 return o;
79072805
LW		 4354}
4355
4356OP *
8ac85365 4357ck_require(OP *o)
8990e307 4358{
11343788
MB		 4359 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4360 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4361
4362 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4363 char *s;
a0d0e21e
LW		 4364 for (s = SvPVX(kid->op_sv); *s; s++) {
4365 if (*s == ':' && s[1] == ':') {
4366 *s = '/';
1aef975c 4367 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4368 --SvCUR(kid->op_sv);
4369 }
8990e307 4370 }
a0d0e21e 4371 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4372 }
4373 }
11343788 4374 return ck_fun(o);
8990e307
LW		 4375}
4376
4377OP *
8ac85365 4378ck_retarget(OP *o)
79072805 4379{
463ee0b2 4380 croak("NOT IMPL LINE %d",__LINE__);
79072805 4381 /* STUB */
11343788 4382 return o;
79072805
LW		 4383}
4384
4385OP *
8ac85365 4386ck_select(OP *o)
79072805 4387{
c07a80fd 4388 OP* kid;
11343788
MB		 4389 if (o->op_flags & OPf_KIDS) {
4390 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4391 if (kid && kid->op_sibling) {
11343788
MB		 4392 o->op_type = OP_SSELECT;
4393 o->op_ppaddr = ppaddr[OP_SSELECT];
4394 o = ck_fun(o);
4395 return fold_constants(o);
79072805
LW		 4396 }
4397 }
11343788
MB		 4398 o = ck_fun(o);
4399 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4400 if (kid && kid->op_type == OP_RV2GV)
4401 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4402 return o;
79072805
LW		 4403}
4404
4405OP *
8ac85365 4406ck_shift(OP *o)
79072805 4407{
11343788 4408 I32 type = o->op_type;
79072805 4409
11343788 4410 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4411 OP *argop;
4412
11343788 4413 op_free(o);
6d4ff0d2 4414#ifdef USE_THREADS
977336f5 4415 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4416 argop = newOP(OP_PADAV, OPf_REF);
4417 argop->op_targ = 0; /* curpad[0] is @_ */
4418 }
4419 else {
4420 argop = newUNOP(OP_RV2AV, 0,
4421 scalar(newGVOP(OP_GV, 0,
4422 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4423 }
4424#else
4425 argop = newUNOP(OP_RV2AV, 0,
977336f5 4426 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4427 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4428#endif /* USE_THREADS */
4429 return newUNOP(type, 0, scalar(argop));
79072805 4430 }
11343788 4431 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4432}
4433
4434OP *
8ac85365 4435ck_sort(OP *o)
79072805 4436{
5dc0d613 4437 o->op_private = 0;
36477c24 4438#ifdef USE_LOCALE
bbce6d69 4439 if (hints & HINT_LOCALE)
5dc0d613 4440 o->op_private |= OPpLOCALE;
bbce6d69 4441#endif
4442
11343788
MB		 4443 if (o->op_flags & OPf_STACKED) {
4444 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4445 OP *k;
4446 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4447
463ee0b2 4448 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4449 linklist(kid);
463ee0b2
LW		 4450 if (kid->op_type == OP_SCOPE) {
4451 k = kid->op_next;
4452 kid->op_next = 0;
79072805 4453 }
463ee0b2 4454 else if (kid->op_type == OP_LEAVE) {
11343788 4455 if (o->op_type == OP_SORT) {
748a9306
LW		 4456 null(kid); /* wipe out leave */
4457 kid->op_next = kid;
463ee0b2 4458
748a9306
LW		 4459 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4460 if (k->op_next == kid)
4461 k->op_next = 0;
4462 }
463ee0b2 4463 }
748a9306
LW		 4464 else
4465 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4466 k = kLISTOP->op_first;
463ee0b2 4467 }
a0d0e21e
LW		 4468 peep(k);
4469
11343788 4470 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4471 null(kid); /* wipe out rv2gv */
11343788 4472 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4473 kid->op_next = kid;
4474 else
4475 kid->op_next = k;
11343788 4476 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4477 }
4478 }
bbce6d69 4479
11343788 4480 return o;
79072805
LW		 4481}
4482
4483OP *
8ac85365 4484ck_split(OP *o)
79072805
LW		 4485{
4486 register OP *kid;
aeea060c 4487
11343788
MB		 4488 if (o->op_flags & OPf_STACKED)
4489 return no_fh_allowed(o);
79072805 4490
11343788 4491 kid = cLISTOPo->op_first;
8990e307 4492 if (kid->op_type != OP_NULL)
463ee0b2 4493 croak("panic: ck_split");
8990e307 4494 kid = kid->op_sibling;
11343788
MB		 4495 op_free(cLISTOPo->op_first);
4496 cLISTOPo->op_first = kid;
85e6fe83 4497 if (!kid) {
11343788
MB		 4498 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4499 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4500 }
79072805
LW		 4501
4502 if (kid->op_type != OP_MATCH) {
4503 OP *sibl = kid->op_sibling;
463ee0b2 4504 kid->op_sibling = 0;
79072805 4505 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4506 if (cLISTOPo->op_first == cLISTOPo->op_last)
4507 cLISTOPo->op_last = kid;
4508 cLISTOPo->op_first = kid;
79072805
LW		 4509 kid->op_sibling = sibl;
4510 }
4511
4512 kid->op_type = OP_PUSHRE;
4513 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4514 scalar(kid);
4515
4516 if (!kid->op_sibling)
54b9620d 4517 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4518
4519 kid = kid->op_sibling;
4520 scalar(kid);
4521
4522 if (!kid->op_sibling)
11343788 4523 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4524
4525 kid = kid->op_sibling;
4526 scalar(kid);
4527
4528 if (kid->op_sibling)
11343788 4529 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4530
11343788 4531 return o;
79072805
LW		 4532}
4533
4534OP *
8ac85365 4535ck_subr(OP *o)
79072805 4536{
11343788
MB		 4537 dTHR;
4538 OP *prev = ((cUNOPo->op_first->op_sibling)
4539 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4540 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4541 OP *cvop;
4542 char *proto = 0;
4543 CV *cv = 0;
46fc3d4c 4544 GV *namegv = 0;
4633a7c4
LW		 4545 int optional = 0;
4546 I32 arg = 0;
4547
11343788 4548 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4549 if (cvop->op_type == OP_RV2CV) {
4550 SVOP* tmpop;
11343788 4551 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4552 null(cvop); /* disable rv2cv */
4553 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4554 if (tmpop->op_type == OP_GV) {
8ebc5c01 4555 cv = GvCVu(tmpop->op_sv);
5dc0d613 4556 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4557 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4558 proto = SvPV((SV*)cv, na);
4559 }
4633a7c4
LW		 4560 }
4561 }
11343788 4562 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4563 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4564 o->op_private |= OPpENTERSUB_DB;
4565 while (o2 != cvop) {
4633a7c4
LW		 4566 if (proto) {
4567 switch (*proto) {
4568 case '\0':
5dc0d613 4569 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4570 case ';':
4571 optional = 1;
4572 proto++;
4573 continue;
4574 case '$':
4575 proto++;
4576 arg++;
11343788 4577 scalar(o2);
4633a7c4
LW		 4578 break;
4579 case '%':
4580 case '@':
11343788 4581 list(o2);
4633a7c4
LW		 4582 arg++;
4583 break;
4584 case '&':
4585 proto++;
4586 arg++;
11343788 4587 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4588 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4589 break;
4590 case '*':
4591 proto++;
4592 arg++;
11343788 4593 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4594 goto wrapref;
4595 {
11343788
MB		 4596 OP* kid = o2;
4597 o2 = newUNOP(OP_RV2GV, 0, kid);
4598 o2->op_sibling = kid->op_sibling;
4633a7c4
LW		 4599 kid->op_sibling = 0;
4600 prev->op_sibling = o;
4601 }
4602 goto wrapref;
4603 case '\\':
4604 proto++;
4605 arg++;
4606 switch (*proto++) {
4607 case '*':
11343788 4608 if (o2->op_type != OP_RV2GV)
5dc0d613 4609 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4610 goto wrapref;
4611 case '&':
11343788 4612 if (o2->op_type != OP_RV2CV)
5dc0d613 4613 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4614 goto wrapref;
4615 case '$':
11343788 4616 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4617 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4618 goto wrapref;
4619 case '@':
11343788 4620 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4621 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4622 goto wrapref;
4623 case '%':
11343788 4624 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4625 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4626 wrapref:
4627 {
11343788
MB		 4628 OP* kid = o2;
4629 o2 = newUNOP(OP_REFGEN, 0, kid);
4630 o2->op_sibling = kid->op_sibling;
4633a7c4 4631 kid->op_sibling = 0;
e858de61 4632 prev->op_sibling = o2;
4633a7c4
LW		 4633 }
4634 break;
4635 default: goto oops;
4636 }
4637 break;
b1cb66bf 4638 case ' ':
4639 proto++;
4640 continue;
4633a7c4
LW		 4641 default:
4642 oops:
4643 croak("Malformed prototype for %s: %s",
46fc3d4c 4644 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4645 }
4646 }
4647 else
11343788
MB		 4648 list(o2);
4649 mod(o2, OP_ENTERSUB);
4650 prev = o2;
4651 o2 = o2->op_sibling;
4633a7c4 4652 }
fb73857a 4653 if (proto && !optional &&
4654 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4655 return too_few_arguments(o, gv_ename(namegv));
11343788 4656 return o;
79072805
LW		 4657}
4658
4659OP *
8ac85365 4660ck_svconst(OP *o)
8990e307 4661{
11343788
MB		 4662 SvREADONLY_on(cSVOPo->op_sv);
4663 return o;
8990e307
LW		 4664}
4665
4666OP *
8ac85365 4667ck_trunc(OP *o)
79072805 4668{
11343788
MB		 4669 if (o->op_flags & OPf_KIDS) {
4670 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4671
a0d0e21e
LW		 4672 if (kid->op_type == OP_NULL)
4673 kid = (SVOP*)kid->op_sibling;
4674 if (kid &&
4675 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4676 o->op_flags |= OPf_SPECIAL;
79072805 4677 }
11343788 4678 return ck_fun(o);
79072805
LW		 4679}
4680
463ee0b2
LW		 4681/* A peephole optimizer. We visit the ops in the order they're to execute. */
4682
79072805 4683void
8ac85365 4684peep(register OP *o)
79072805 4685{
11343788 4686 dTHR;
79072805 4687 register OP* oldop = 0;
a0d0e21e 4688 if (!o || o->op_seq)
79072805 4689 return;
a0d0e21e 4690 ENTER;
462e5cf6 4691 SAVEOP();
a0d0e21e
LW		 4692 SAVESPTR(curcop);
4693 for (; o; o = o->op_next) {
4694 if (o->op_seq)
4695 break;
c07a80fd 4696 if (!op_seqmax)
4697 op_seqmax++;
a0d0e21e
LW		 4698 op = o;
4699 switch (o->op_type) {
4700 case OP_NEXTSTATE:
4701 case OP_DBSTATE:
4702 curcop = ((COP*)o); /* for warnings */
c07a80fd 4703 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4704 break;
4705
4706 case OP_CONCAT:
4707 case OP_CONST:
4708 case OP_JOIN:
4709 case OP_UC:
4710 case OP_UCFIRST:
4711 case OP_LC:
4712 case OP_LCFIRST:
4713 case OP_QUOTEMETA:
3c4f770c 4714 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4715 null(o->op_next);
c07a80fd 4716 o->op_seq = op_seqmax++;
a0d0e21e 4717 break;
8990e307 4718 case OP_STUB:
54310121 4719 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4720 o->op_seq = op_seqmax++;
54310121 4721 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4722 }
748a9306 4723 goto nothin;
79072805 4724 case OP_NULL:
748a9306
LW		 4725 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
4726 curcop = ((COP*)op);
4727 goto nothin;
79072805 4728 case OP_SCALAR:
93a17b20 4729 case OP_LINESEQ:
463ee0b2 4730 case OP_SCOPE:
748a9306 4731 nothin:
a0d0e21e
LW		 4732 if (oldop && o->op_next) {
4733 oldop->op_next = o->op_next;
79072805
LW		 4734 continue;
4735 }
c07a80fd 4736 o->op_seq = op_seqmax++;
79072805
LW		 4737 break;
4738
4739 case OP_GV:
a0d0e21e 4740 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4741 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4742 null(o->op_next);
4743 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4744 o->op_next = o->op_next->op_next;
4745 o->op_type = OP_GVSV;
4746 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4747 }
4748 }
a0d0e21e
LW		 4749 else if (o->op_next->op_type == OP_RV2AV) {
4750 OP* pop = o->op_next->op_next;
4751 IV i;
8990e307 4752 if (pop->op_type == OP_CONST &&
e858de61 4753 (op = pop->op_next) &&
8990e307 4754 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4755 !(pop->op_next->op_private &
68dc0745 4756 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4757 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4758 <= 255 &&
8990e307
LW		 4759 i >= 0)
4760 {
748a9306 4761 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4762 null(o->op_next);
8990e307
LW		 4763 null(pop->op_next);
4764 null(pop);
a0d0e21e
LW		 4765 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4766 o->op_next = pop->op_next->op_next;
4767 o->op_type = OP_AELEMFAST;
4768 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4769 o->op_private = (U8)i;
a6006777 4770 GvAVn(((GVOP*)o)->op_gv);
8990e307 4771 }
79072805 4772 }
c07a80fd 4773 o->op_seq = op_seqmax++;
79072805
LW		 4774 break;
4775
af41f3ca
MB		 4776 case OP_PADAV:
4777 if (o->op_next->op_type == OP_RV2AV
4778 && (o->op_next->op_flags && OPf_REF))
4779 {
4780 null(o->op_next);
4781 o->op_next = o->op_next->op_next;
4782 }
4783 break;
aeea060c 4784
af41f3ca
MB		 4785 case OP_PADHV:
4786 if (o->op_next->op_type == OP_RV2HV
4787 && (o->op_next->op_flags && OPf_REF))
4788 {
4789 null(o->op_next);
4790 o->op_next = o->op_next->op_next;
4791 }
4792 break;
4793
a0d0e21e 4794 case OP_MAPWHILE:
79072805
LW		 4795 case OP_GREPWHILE:
4796 case OP_AND:
4797 case OP_OR:
c07a80fd 4798 o->op_seq = op_seqmax++;
79072805
LW		 4799 peep(cLOGOP->op_other);
4800 break;
4801
4802 case OP_COND_EXPR:
c07a80fd 4803 o->op_seq = op_seqmax++;
79072805
LW		 4804 peep(cCONDOP->op_true);
4805 peep(cCONDOP->op_false);
4806 break;
4807
4808 case OP_ENTERLOOP:
c07a80fd 4809 o->op_seq = op_seqmax++;
79072805
LW		 4810 peep(cLOOP->op_redoop);
4811 peep(cLOOP->op_nextop);
4812 peep(cLOOP->op_lastop);
4813 break;
4814
4815 case OP_MATCH:
4816 case OP_SUBST:
c07a80fd 4817 o->op_seq = op_seqmax++;
a0d0e21e 4818 peep(cPMOP->op_pmreplstart);
79072805
LW		 4819 break;
4820
a0d0e21e 4821 case OP_EXEC:
c07a80fd 4822 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4823 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
4824 if (o->op_next->op_sibling &&
4825 o->op_next->op_sibling->op_type != OP_DIE) {
4826 line_t oldline = curcop->cop_line;
4827
4828 curcop->cop_line = ((COP*)o->op_next)->cop_line;
4829 warn("Statement unlikely to be reached");
4830 warn("(Maybe you meant system() when you said exec()?)\n");
4831 curcop->cop_line = oldline;
4832 }
4833 }
4834 break;
aeea060c 4835
c750a3ec
MB		 4836 case OP_HELEM: {
4837 UNOP *rop;
4838 SV *lexname;
4839 GV **fields;
4840 SV **svp, **indsvp;
4841 I32 ind;
4842 char *key;
4843 STRLEN keylen;
aeea060c 4844
c750a3ec
MB		 4845 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
4846 || ((BINOP*)o)->op_last->op_type != OP_CONST)
4847 break;
4848 rop = (UNOP*)((BINOP*)o)->op_first;
4849 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
4850 break;
4851 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
4852 if (!SvOBJECT(lexname))
4853 break;
5196be3e 4854 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 4855 if (!fields || !GvHV(*fields))
4856 break;
4857 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
4858 key = SvPV(*svp, keylen);
4859 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
4860 if (!indsvp) {
4861 croak("No such field \"%s\" in variable %s of type %s",
4862 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
4863 }
4864 ind = SvIV(*indsvp);
4865 if (ind < 1)
4866 croak("Bad index while coercing array into hash");
4867 rop->op_type = OP_RV2AV;
4868 rop->op_ppaddr = ppaddr[OP_RV2AV];
4869 o->op_type = OP_AELEM;
4870 o->op_ppaddr = ppaddr[OP_AELEM];
4871 SvREFCNT_dec(*svp);
4872 *svp = newSViv(ind);
4873 break;
4874 }
4875
79072805 4876 default:
c07a80fd 4877 o->op_seq = op_seqmax++;
79072805
LW		 4878 break;
4879 }
a0d0e21e 4880 oldop = o;
79072805 4881 }
a0d0e21e 4882 LEAVE;
79072805 4883}
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