This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
https://perl5.git.perl.org / perl5.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Atari MiNT port by Guido Flohr <gufl0000@stud.uni-sb.de>
[perl5.git] / op.c
CommitLineData
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
76e3520e 21#ifdef PERL_OBJECT
22c35a8c 22#define CHECKCALL this->*PL_check
76e3520e 23#else
22c35a8c 24#define CHECKCALL *PL_check
76e3520e
GS		 25#endif
26
e50aee73 27/*
5dc0d613 28 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 29 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 30 */
11343788 31#define CHECKOP(type,o) \
3280af22 32 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 33 ? ( op_free((OP*)o), \
22c35a8c 34 croak("%s trapped by operation mask", PL_op_desc[type]), \
28757baa 35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
c53d7c7d
HS		 38#define PAD_MAX 999999999
39
76e3520e
GS		 40static bool scalar_mod_type _((OP *o, I32 type));
41#ifndef PERL_OBJECT
11343788 42static I32 list_assignment _((OP *o));
3bc5dc61 43static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 44static OP *modkids _((OP *o, I32 type));
45static OP *no_fh_allowed _((OP *o));
46static OP *scalarboolean _((OP *o));
47static OP *too_few_arguments _((OP *o, char* name));
48static OP *too_many_arguments _((OP *o, char* name));
49static void null _((OP* o));
bbce6d69 50static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
155fc61f 51 CV* startcv, I32 cx_ix, I32 saweval));
54b9620d 52static OP *newDEFSVOP _((void));
883ffac3 53static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 54#endif
79072805 55
76e3520e 56STATIC char*
8ac85365 57gv_ename(GV *gv)
4633a7c4 58{
2d8e6c8d 59 STRLEN n_a;
4633a7c4 60 SV* tmpsv = sv_newmortal();
46fc3d4c 61 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 62 return SvPV(tmpsv,n_a);
4633a7c4
LW		 63}
64
76e3520e 65STATIC OP *
8ac85365 66no_fh_allowed(OP *o)
79072805 67{
46fc3d4c 68 yyerror(form("Missing comma after first argument to %s function",
22c35a8c 69 PL_op_desc[o->op_type]));
11343788 70 return o;
79072805
LW		 71}
72
76e3520e 73STATIC OP *
8ac85365 74too_few_arguments(OP *o, char *name)
79072805 75{
46fc3d4c 76 yyerror(form("Not enough arguments for %s", name));
11343788 77 return o;
79072805
LW		 78}
79
76e3520e 80STATIC OP *
8ac85365 81too_many_arguments(OP *o, char *name)
79072805 82{
46fc3d4c 83 yyerror(form("Too many arguments for %s", name));
11343788 84 return o;
79072805
LW		 85}
86
76e3520e 87STATIC void
8ac85365 88bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 89{
46fc3d4c 90 yyerror(form("Type of arg %d to %s must be %s (not %s)",
22c35a8c 91 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 92}
93
a0d0e21e 94void
8ac85365 95assertref(OP *o)
a0d0e21e 96{
11343788 97 int type = o->op_type;
136254bc 98 if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
22c35a8c 99 yyerror(form("Can't use subscript on %s", PL_op_desc[type]));
bde90e66 100 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 101 dTHR;
bde90e66
HS		 102 SV *msg = sv_2mortal(
103 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
104 type == OP_ENTERSUB ? '&' : '%'));
3280af22 105 if (PL_in_eval & 2)
bde90e66 106 warn("%_", msg);
3280af22
NIS		 107 else if (PL_in_eval)
108 sv_catsv(GvSV(PL_errgv), msg);
bde90e66
HS		 109 else
110 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
111 }
a0d0e21e
LW		 112 }
113}
114
79072805
LW		 115/* "register" allocation */
116
117PADOFFSET
8ac85365 118pad_allocmy(char *name)
93a17b20 119{
11343788 120 dTHR;
a0d0e21e
LW		 121 PADOFFSET off;
122 SV *sv;
123
834a4ddd
LW		 124 if (!(
125 isALPHA(name[1]) ||
126 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
127 name[1] == '_' && (int)strlen(name) > 2))
128 {
46fc3d4c 129 if (!isPRINT(name[1])) {
130 name[3] = '\0';
131 name[2] = toCTRL(name[1]);
132 name[1] = '^';
133 }
a0d0e21e
LW		 134 croak("Can't use global %s in \"my\"",name);
135 }
599cee73 136 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 137 SV **svp = AvARRAY(PL_comppad_name);
138 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 139 if ((sv = svp[off])
3280af22 140 && sv != &PL_sv_undef
c53d7c7d 141 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 142 && strEQ(name, SvPVX(sv)))
143 {
599cee73 144 warner(WARN_UNSAFE,
9fbbe825 145 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 146 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 147 break;
148 }
149 }
150 }
a0d0e21e
LW		 151 off = pad_alloc(OP_PADSV, SVs_PADMY);
152 sv = NEWSV(1102,0);
93a17b20
LW		 153 sv_upgrade(sv, SVt_PVNV);
154 sv_setpv(sv, name);
3280af22 155 if (PL_in_my_stash) {
c750a3ec
MB		 156 if (*name != '$')
157 croak("Can't declare class for non-scalar %s in \"my\"",name);
158 SvOBJECT_on(sv);
159 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 160 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
161 PL_sv_objcount++;
c750a3ec 162 }
3280af22 163 av_store(PL_comppad_name, off, sv);
c53d7c7d 164 SvNVX(sv) = (double)PAD_MAX;
8990e307 165 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 166 if (!PL_min_intro_pending)
167 PL_min_intro_pending = off;
168 PL_max_intro_pending = off;
93a17b20 169 if (*name == '@')
3280af22 170 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 171 else if (*name == '%')
3280af22
NIS		 172 av_store(PL_comppad, off, (SV*)newHV());
173 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 174 return off;
175}
176
76e3520e 177STATIC PADOFFSET
155fc61f 178pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix, I32 saweval)
93a17b20 179{
11343788 180 dTHR;
748a9306 181 CV *cv;
93a17b20
LW		 182 I32 off;
183 SV *sv;
93a17b20 184 register I32 i;
c09156bb 185 register PERL_CONTEXT *cx;
93a17b20 186
748a9306 187 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 188 AV *curlist = CvPADLIST(cv);
189 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 190 AV *curname;
4fdae800 191
3280af22 192 if (!svp || *svp == &PL_sv_undef)
4633a7c4 193 continue;
748a9306
LW		 194 curname = (AV*)*svp;
195 svp = AvARRAY(curname);
93965878 196 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 197 if ((sv = svp[off]) &&
3280af22 198 sv != &PL_sv_undef &&
748a9306 199 seq <= SvIVX(sv) &&
13826f2c 200 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 201 strEQ(SvPVX(sv), name))
202 {
5f05dabc 203 I32 depth;
204 AV *oldpad;
205 SV *oldsv;
206
207 depth = CvDEPTH(cv);
208 if (!depth) {
9607fc9c 209 if (newoff) {
210 if (SvFAKE(sv))
211 continue;
4fdae800 212 return 0; /* don't clone from inactive stack frame */
9607fc9c 213 }
5f05dabc 214 depth = 1;
215 }
216 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
217 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 218 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 219 SV *namesv = NEWSV(1103,0);
748a9306 220 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 221 sv_upgrade(namesv, SVt_PVNV);
222 sv_setpv(namesv, name);
3280af22
NIS		 223 av_store(PL_comppad_name, newoff, namesv);
224 SvNVX(namesv) = (double)PL_curcop->cop_seq;
c53d7c7d 225 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 226 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 227 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 228 SvOBJECT_on(namesv);
229 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 230 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 231 PL_sv_objcount++;
232 }
3280af22 233 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 234 /* "It's closures all the way down." */
3280af22 235 CvCLONE_on(PL_compcv);
54310121 236 if (cv == startcv) {
3280af22 237 if (CvANON(PL_compcv))
54310121 238 oldsv = Nullsv; /* no need to keep ref */
239 }
240 else {
28757baa 241 CV *bcv;
242 for (bcv = startcv;
243 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 244 bcv = CvOUTSIDE(bcv))
245 {
28757baa 246 if (CvANON(bcv))
247 CvCLONE_on(bcv);
248 else {
6b35e009
GS		 249 if (ckWARN(WARN_CLOSURE)
250 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
251 {
599cee73 252 warner(WARN_CLOSURE,
44a8e56a 253 "Variable \"%s\" may be unavailable",
28757baa 254 name);
6b35e009 255 }
28757baa 256 break;
257 }
258 }
259 }
260 }
3280af22 261 else if (!CvUNIQUE(PL_compcv)) {
599cee73
PM		 262 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
263 warner(WARN_CLOSURE,
264 "Variable \"%s\" will not stay shared", name);
5f05dabc 265 }
748a9306 266 }
3280af22 267 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 268 return newoff;
269 }
93a17b20
LW		 270 }
271 }
272
273 /* Nothing in current lexical context--try eval's context, if any.
274 * This is necessary to let the perldb get at lexically scoped variables.
275 * XXX This will also probably interact badly with eval tree caching.
276 */
277
748a9306 278 for (i = cx_ix; i >= 0; i--) {
93a17b20 279 cx = &cxstack[i];
6b35e009 280 switch (CxTYPE(cx)) {
93a17b20 281 default:
748a9306
LW		 282 if (i == 0 && saweval) {
283 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 284 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval);
748a9306 285 }
93a17b20
LW		 286 break;
287 case CXt_EVAL:
44a8e56a 288 switch (cx->blk_eval.old_op_type) {
289 case OP_ENTEREVAL:
6b35e009
GS		 290 if (CxREALEVAL(cx))
291 saweval = i;
44a8e56a 292 break;
293 case OP_REQUIRE:
294 /* require must have its own scope */
295 return 0;
296 }
93a17b20
LW		 297 break;
298 case CXt_SUB:
299 if (!saweval)
300 return 0;
301 cv = cx->blk_sub.cv;
3280af22 302 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 303 saweval = i; /* so we know where we were called from */
93a17b20 304 continue;
93a17b20 305 }
748a9306 306 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 307 return pad_findlex(name, newoff, seq, cv, i-1, saweval);
93a17b20
LW		 308 }
309 }
310
748a9306
LW		 311 return 0;
312}
a0d0e21e 313
748a9306 314PADOFFSET
8ac85365 315pad_findmy(char *name)
748a9306 316{
11343788 317 dTHR;
748a9306 318 I32 off;
54310121 319 I32 pendoff = 0;
748a9306 320 SV *sv;
3280af22
NIS		 321 SV **svp = AvARRAY(PL_comppad_name);
322 U32 seq = PL_cop_seqmax;
6b35e009 323 PERL_CONTEXT *cx;
33b8ce05 324 CV *outside;
748a9306 325
11343788
MB		 326#ifdef USE_THREADS
327 /*
328 * Special case to get lexical (and hence per-thread) @_.
329 * XXX I need to find out how to tell at parse-time whether use
330 * of @_ should refer to a lexical (from a sub) or defgv (global
331 * scope and maybe weird sub-ish things like formats). See
332 * startsub in perly.y. It's possible that @_ could be lexical
333 * (at least from subs) even in non-threaded perl.
334 */
335 if (strEQ(name, "@_"))
336 return 0; /* success. (NOT_IN_PAD indicates failure) */
337#endif /* USE_THREADS */
338
748a9306 339 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 340 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 341 if ((sv = svp[off]) &&
3280af22 342 sv != &PL_sv_undef &&
54310121 343 (!SvIVX(sv) ||
344 (seq <= SvIVX(sv) &&
345 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 346 strEQ(SvPVX(sv), name))
347 {
54310121 348 if (SvIVX(sv))
349 return (PADOFFSET)off;
350 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 351 }
352 }
748a9306 353
33b8ce05
GS		 354 outside = CvOUTSIDE(PL_compcv);
355
356 /* Check if if we're compiling an eval'', and adjust seq to be the
357 * eval's seq number. This depends on eval'' having a non-null
358 * CvOUTSIDE() while it is being compiled. The eval'' itself is
359 * identified by CvUNIQUE being set and CvGV being null. */
360 if (outside && CvUNIQUE(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 361 cx = &cxstack[cxstack_ix];
362 if (CxREALEVAL(cx))
363 seq = cx->blk_oldcop->cop_seq;
364 }
365
748a9306 366 /* See if it's in a nested scope */
33b8ce05 367 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0);
54310121 368 if (off) {
369 /* If there is a pending local definition, this new alias must die */
370 if (pendoff)
3280af22 371 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 372 return off; /* pad_findlex returns 0 for failure...*/
54310121 373 }
11343788 374 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 375}
376
377void
8ac85365 378pad_leavemy(I32 fill)
93a17b20
LW		 379{
380 I32 off;
3280af22 381 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 382 SV *sv;
3280af22
NIS		 383 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
384 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
385 if ((sv = svp[off]) && sv != &PL_sv_undef)
8990e307
LW		 386 warn("%s never introduced", SvPVX(sv));
387 }
388 }
389 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 390 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 391 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 392 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 393 }
394}
395
396PADOFFSET
8ac85365 397pad_alloc(I32 optype, U32 tmptype)
79072805 398{
11343788 399 dTHR;
79072805
LW		 400 SV *sv;
401 I32 retval;
402
3280af22 403 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 404 croak("panic: pad_alloc");
3280af22 405 if (PL_pad_reset_pending)
a0d0e21e 406 pad_reset();
ed6116ce 407 if (tmptype & SVs_PADMY) {
79072805 408 do {
3280af22 409 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 410 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 411 retval = AvFILLp(PL_comppad);
79072805
LW		 412 }
413 else {
3280af22
NIS		 414 SV **names = AvARRAY(PL_comppad_name);
415 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 416 for (;;) {
417 /*
418 * "foreach" index vars temporarily become aliases to non-"my"
419 * values. Thus we must skip, not just pad values that are
420 * marked as current pad values, but also those with names.
421 */
3280af22
NIS		 422 if (++PL_padix <= names_fill &&
423 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 424 continue;
3280af22 425 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 426 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
427 break;
428 }
3280af22 429 retval = PL_padix;
79072805 430 }
8990e307 431 SvFLAGS(sv) |= tmptype;
3280af22 432 PL_curpad = AvARRAY(PL_comppad);
11343788 433#ifdef USE_THREADS
5dc0d613 434 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 435 (unsigned long) thr, (unsigned long) PL_curpad,
22c35a8c 436 (long) retval, PL_op_name[optype]));
11343788 437#else
d9bb4600 438 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 439 (unsigned long) PL_curpad,
22c35a8c 440 (long) retval, PL_op_name[optype]));
11343788 441#endif /* USE_THREADS */
79072805
LW		 442 return (PADOFFSET)retval;
443}
444
445SV *
8990e307 446pad_sv(PADOFFSET po)
79072805 447{
11343788
MB		 448 dTHR;
449#ifdef USE_THREADS
5dc0d613 450 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 451 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 452#else
79072805 453 if (!po)
463ee0b2 454 croak("panic: pad_sv po");
d9bb4600 455 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 456 (unsigned long) PL_curpad, po));
11343788 457#endif /* USE_THREADS */
3280af22 458 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 459}
460
461void
8990e307 462pad_free(PADOFFSET po)
79072805 463{
11343788 464 dTHR;
3280af22 465 if (!PL_curpad)
a0d0e21e 466 return;
3280af22 467 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 468 croak("panic: pad_free curpad");
79072805 469 if (!po)
463ee0b2 470 croak("panic: pad_free po");
11343788 471#ifdef USE_THREADS
5dc0d613 472 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 473 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 474#else
d9bb4600 475 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 476 (unsigned long) PL_curpad, po));
11343788 477#endif /* USE_THREADS */
3280af22
NIS		 478 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
479 SvPADTMP_off(PL_curpad[po]);
480 if ((I32)po < PL_padix)
481 PL_padix = po - 1;
79072805
LW		 482}
483
484void
8990e307 485pad_swipe(PADOFFSET po)
79072805 486{
11343788 487 dTHR;
3280af22 488 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 489 croak("panic: pad_swipe curpad");
79072805 490 if (!po)
463ee0b2 491 croak("panic: pad_swipe po");
11343788 492#ifdef USE_THREADS
5dc0d613 493 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 494 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 495#else
d9bb4600 496 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 497 (unsigned long) PL_curpad, po));
11343788 498#endif /* USE_THREADS */
3280af22
NIS		 499 SvPADTMP_off(PL_curpad[po]);
500 PL_curpad[po] = NEWSV(1107,0);
501 SvPADTMP_on(PL_curpad[po]);
502 if ((I32)po < PL_padix)
503 PL_padix = po - 1;
79072805
LW		 504}
505
d9bb4600
GS		 506/* XXX pad_reset() is currently disabled because it results in serious bugs.
507 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
508 * on the stack by OPs that use them, there are several ways to get an alias
509 * to a shared TARG. Such an alias will change randomly and unpredictably.
510 * We avoid doing this until we can think of a Better Way.
511 * GSAR 97-10-29 */
79072805 512void
8ac85365 513pad_reset(void)
79072805 514{
d9bb4600 515#ifdef USE_BROKEN_PAD_RESET
11343788 516 dTHR;
79072805
LW		 517 register I32 po;
518
6b88bc9c 519 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 520 croak("panic: pad_reset curpad");
11343788 521#ifdef USE_THREADS
5dc0d613 522 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 523 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 524#else
d9bb4600 525 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 526 (unsigned long) PL_curpad));
11343788 527#endif /* USE_THREADS */
6b88bc9c
GS		 528 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
529 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
530 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
531 SvPADTMP_off(PL_curpad[po]);
748a9306 532 }
6b88bc9c 533 PL_padix = PL_padix_floor;
79072805 534 }
d9bb4600 535#endif
3280af22 536 PL_pad_reset_pending = FALSE;
79072805
LW		 537}
538
a863c7d1 539#ifdef USE_THREADS
54b9620d 540/* find_threadsv is not reentrant */
a863c7d1 541PADOFFSET
54b9620d 542find_threadsv(char *name)
a863c7d1
MB		 543{
544 dTHR;
545 char *p;
546 PADOFFSET key;
554b3eca 547 SV **svp;
54b9620d 548 /* We currently only handle names of a single character */
533c011a 549 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 550 if (!p)
551 return NOT_IN_PAD;
533c011a 552 key = p - PL_threadsv_names;
2d8e6c8d 553 MUTEX_LOCK(&thr->mutex);
54b9620d 554 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 555 if (svp)
556 MUTEX_UNLOCK(&thr->mutex);
557 else {
554b3eca 558 SV *sv = NEWSV(0, 0);
54b9620d 559 av_store(thr->threadsv, key, sv);
940cb80d 560 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 561 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 562 /*
563 * Some magic variables used to be automagically initialised
564 * in gv_fetchpv. Those which are now per-thread magicals get
565 * initialised here instead.
566 */
567 switch (*name) {
54b9620d
MB		 568 case '_':
569 break;
554b3eca
MB		 570 case ';':
571 sv_setpv(sv, "\034");
54b9620d 572 sv_magic(sv, 0, 0, name, 1);
554b3eca 573 break;
c277df42
IZ		 574 case '&':
575 case '`':
576 case '\'':
533c011a 577 PL_sawampersand = TRUE;
a3f914c5
GS		 578 /* FALL THROUGH */
579 case '1':
580 case '2':
581 case '3':
582 case '4':
583 case '5':
584 case '6':
585 case '7':
586 case '8':
587 case '9':
c277df42 588 SvREADONLY_on(sv);
d8b5173a 589 /* FALL THROUGH */
067391ea
GS		 590
591 /* XXX %! tied to Errno.pm needs to be added here.
592 * See gv_fetchpv(). */
593 /* case '!': */
594
54b9620d
MB		 595 default:
596 sv_magic(sv, 0, 0, name, 1);
554b3eca 597 }
8b73bbec 598 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 599 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 600 sv, (*name < 32) ? "^" : "",
601 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 602 }
603 return key;
604}
605#endif /* USE_THREADS */
606
79072805
LW		 607/* Destructor */
608
609void
8ac85365 610op_free(OP *o)
79072805 611{
85e6fe83 612 register OP *kid, *nextkid;
79072805 613
5dc0d613 614 if (!o || o->op_seq == (U16)-1)
79072805
LW		 615 return;
616
11343788
MB		 617 if (o->op_flags & OPf_KIDS) {
618 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 619 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 620 op_free(kid);
85e6fe83 621 }
79072805
LW		 622 }
623
11343788 624 switch (o->op_type) {
8990e307 625 case OP_NULL:
11343788 626 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 627 break;
a0d0e21e 628 case OP_ENTEREVAL:
11343788 629 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 630 break;
554b3eca 631#ifdef USE_THREADS
8dd3ba40
SM		 632 case OP_ENTERITER:
633 if (!(o->op_flags & OPf_SPECIAL))
634 break;
635 /* FALL THROUGH */
2faa37cc 636 case OP_THREADSV:
54b9620d 637 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 638 break;
639#endif /* USE_THREADS */
a6006777 640 default:
ac4c12e7 641 if (!(o->op_flags & OPf_REF)
22c35a8c 642 || (PL_check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 643 break;
644 /* FALL THROUGH */
463ee0b2 645 case OP_GVSV:
79072805 646 case OP_GV:
a6006777 647 case OP_AELEMFAST:
11343788 648 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 649 break;
650 case OP_NEXTSTATE:
651 case OP_DBSTATE:
5196be3e 652 Safefree(cCOPo->cop_label);
11343788 653 SvREFCNT_dec(cCOPo->cop_filegv);
599cee73
PM		 654 if (cCOPo->cop_warnings != WARN_NONE && cCOPo->cop_warnings != WARN_ALL)
655 SvREFCNT_dec(cCOPo->cop_warnings);
79072805
LW		 656 break;
657 case OP_CONST:
11343788 658 SvREFCNT_dec(cSVOPo->op_sv);
79072805 659 break;
748a9306
LW		 660 case OP_GOTO:
661 case OP_NEXT:
662 case OP_LAST:
663 case OP_REDO:
11343788 664 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 665 break;
666 /* FALL THROUGH */
a0d0e21e 667 case OP_TRANS:
a0ed51b3
LW		 668 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
669 SvREFCNT_dec(cSVOPo->op_sv);
670 else
671 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 672 break;
673 case OP_SUBST:
11343788 674 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 675 /* FALL THROUGH */
748a9306 676 case OP_PUSHRE:
a0d0e21e 677 case OP_MATCH:
8782bef2 678 case OP_QR:
c277df42 679 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 680 break;
79072805
LW		 681 }
682
11343788
MB		 683 if (o->op_targ > 0)
684 pad_free(o->op_targ);
8990e307 685
11343788 686 Safefree(o);
79072805
LW		 687}
688
76e3520e 689STATIC void
8ac85365 690null(OP *o)
8990e307 691{
54b9620d 692 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 693 pad_free(o->op_targ);
694 o->op_targ = o->op_type;
695 o->op_type = OP_NULL;
22c35a8c 696 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 697}
698
79072805
LW		 699/* Contextualizers */
700
463ee0b2 701#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 702
703OP *
8ac85365 704linklist(OP *o)
79072805
LW		 705{
706 register OP *kid;
707
11343788
MB		 708 if (o->op_next)
709 return o->op_next;
79072805
LW		 710
711 /* establish postfix order */
11343788
MB		 712 if (cUNOPo->op_first) {
713 o->op_next = LINKLIST(cUNOPo->op_first);
714 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 715 if (kid->op_sibling)
716 kid->op_next = LINKLIST(kid->op_sibling);
717 else
11343788 718 kid->op_next = o;
79072805
LW		 719 }
720 }
721 else
11343788 722 o->op_next = o;
79072805 723
11343788 724 return o->op_next;
79072805
LW		 725}
726
727OP *
8ac85365 728scalarkids(OP *o)
79072805
LW		 729{
730 OP *kid;
11343788
MB		 731 if (o && o->op_flags & OPf_KIDS) {
732 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 733 scalar(kid);
734 }
11343788 735 return o;
79072805
LW		 736}
737
76e3520e 738STATIC OP *
8ac85365 739scalarboolean(OP *o)
8990e307 740{
d008e5eb 741 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 742 dTHR;
d008e5eb
GS		 743 if (ckWARN(WARN_SYNTAX)) {
744 line_t oldline = PL_curcop->cop_line;
a0d0e21e 745
d008e5eb
GS		 746 if (PL_copline != NOLINE)
747 PL_curcop->cop_line = PL_copline;
748 warner(WARN_SYNTAX, "Found = in conditional, should be ==");
749 PL_curcop->cop_line = oldline;
750 }
a0d0e21e 751 }
11343788 752 return scalar(o);
8990e307
LW		 753}
754
755OP *
8ac85365 756scalar(OP *o)
79072805
LW		 757{
758 OP *kid;
759
a0d0e21e 760 /* assumes no premature commitment */
3280af22 761 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 762 || o->op_type == OP_RETURN)
11343788 763 return o;
79072805 764
5dc0d613 765 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 766
11343788 767 switch (o->op_type) {
79072805 768 case OP_REPEAT:
11343788
MB		 769 if (o->op_private & OPpREPEAT_DOLIST)
770 null(((LISTOP*)cBINOPo->op_first)->op_first);
771 scalar(cBINOPo->op_first);
8990e307 772 break;
79072805
LW		 773 case OP_OR:
774 case OP_AND:
775 case OP_COND_EXPR:
11343788 776 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 777 scalar(kid);
79072805 778 break;
a0d0e21e 779 case OP_SPLIT:
11343788 780 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 781 if (!kPMOP->op_pmreplroot)
782 deprecate("implicit split to @_");
783 }
784 /* FALL THROUGH */
79072805 785 case OP_MATCH:
8782bef2 786 case OP_QR:
79072805
LW		 787 case OP_SUBST:
788 case OP_NULL:
8990e307 789 default:
11343788
MB		 790 if (o->op_flags & OPf_KIDS) {
791 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 792 scalar(kid);
793 }
79072805
LW		 794 break;
795 case OP_LEAVE:
796 case OP_LEAVETRY:
5dc0d613 797 kid = cLISTOPo->op_first;
54310121 798 scalar(kid);
799 while (kid = kid->op_sibling) {
800 if (kid->op_sibling)
801 scalarvoid(kid);
802 else
803 scalar(kid);
804 }
3280af22 805 WITH_THR(PL_curcop = &PL_compiling);
54310121 806 break;
748a9306 807 case OP_SCOPE:
79072805 808 case OP_LINESEQ:
8990e307 809 case OP_LIST:
11343788 810 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 811 if (kid->op_sibling)
812 scalarvoid(kid);
813 else
814 scalar(kid);
815 }
3280af22 816 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 817 break;
818 }
11343788 819 return o;
79072805
LW		 820}
821
822OP *
8ac85365 823scalarvoid(OP *o)
79072805
LW		 824{
825 OP *kid;
8990e307
LW		 826 char* useless = 0;
827 SV* sv;
79072805 828
54310121 829 /* assumes no premature commitment */
68c73484
JH		 830 U8 want = o->op_flags & OPf_WANT;
831 if (!o || (want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 832 || o->op_type == OP_RETURN)
11343788 833 return o;
79072805 834
5dc0d613 835 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 836
11343788 837 switch (o->op_type) {
79072805 838 default:
22c35a8c 839 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 840 break;
36477c24 841 /* FALL THROUGH */
842 case OP_REPEAT:
11343788 843 if (o->op_flags & OPf_STACKED)
8990e307 844 break;
5d82c453
GA		 845 goto func_ops;
846 case OP_SUBSTR:
847 if (o->op_private == 4)
848 break;
8990e307
LW		 849 /* FALL THROUGH */
850 case OP_GVSV:
851 case OP_WANTARRAY:
852 case OP_GV:
853 case OP_PADSV:
854 case OP_PADAV:
855 case OP_PADHV:
856 case OP_PADANY:
857 case OP_AV2ARYLEN:
8990e307 858 case OP_REF:
a0d0e21e
LW		 859 case OP_REFGEN:
860 case OP_SREFGEN:
8990e307
LW		 861 case OP_DEFINED:
862 case OP_HEX:
863 case OP_OCT:
864 case OP_LENGTH:
8990e307
LW		 865 case OP_VEC:
866 case OP_INDEX:
867 case OP_RINDEX:
868 case OP_SPRINTF:
869 case OP_AELEM:
870 case OP_AELEMFAST:
871 case OP_ASLICE:
8990e307
LW		 872 case OP_HELEM:
873 case OP_HSLICE:
874 case OP_UNPACK:
875 case OP_PACK:
8990e307
LW		 876 case OP_JOIN:
877 case OP_LSLICE:
878 case OP_ANONLIST:
879 case OP_ANONHASH:
880 case OP_SORT:
881 case OP_REVERSE:
882 case OP_RANGE:
883 case OP_FLIP:
884 case OP_FLOP:
885 case OP_CALLER:
886 case OP_FILENO:
887 case OP_EOF:
888 case OP_TELL:
889 case OP_GETSOCKNAME:
890 case OP_GETPEERNAME:
891 case OP_READLINK:
892 case OP_TELLDIR:
893 case OP_GETPPID:
894 case OP_GETPGRP:
895 case OP_GETPRIORITY:
896 case OP_TIME:
897 case OP_TMS:
898 case OP_LOCALTIME:
899 case OP_GMTIME:
900 case OP_GHBYNAME:
901 case OP_GHBYADDR:
902 case OP_GHOSTENT:
903 case OP_GNBYNAME:
904 case OP_GNBYADDR:
905 case OP_GNETENT:
906 case OP_GPBYNAME:
907 case OP_GPBYNUMBER:
908 case OP_GPROTOENT:
909 case OP_GSBYNAME:
910 case OP_GSBYPORT:
911 case OP_GSERVENT:
912 case OP_GPWNAM:
913 case OP_GPWUID:
914 case OP_GGRNAM:
915 case OP_GGRGID:
916 case OP_GETLOGIN:
5d82c453 917 func_ops:
11343788 918 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 919 useless = PL_op_desc[o->op_type];
8990e307
LW		 920 break;
921
922 case OP_RV2GV:
923 case OP_RV2SV:
924 case OP_RV2AV:
925 case OP_RV2HV:
11343788
MB		 926 if (!(o->op_private & OPpLVAL_INTRO) &&
927 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 928 useless = "a variable";
929 break;
79072805 930
93a17b20 931 case OP_NEXTSTATE:
8990e307 932 case OP_DBSTATE:
3280af22 933 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 934 break;
935
79072805 936 case OP_CONST:
11343788 937 sv = cSVOPo->op_sv;
d008e5eb
GS		 938 {
939 dTHR;
940 if (ckWARN(WARN_VOID)) {
941 useless = "a constant";
942 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
943 useless = 0;
944 else if (SvPOK(sv)) {
945 if (strnEQ(SvPVX(sv), "di", 2) ||
946 strnEQ(SvPVX(sv), "ds", 2) ||
947 strnEQ(SvPVX(sv), "ig", 2))
948 useless = 0;
949 }
8990e307
LW		 950 }
951 }
11343788 952 null(o); /* don't execute a constant */
8990e307 953 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 954 break;
955
956 case OP_POSTINC:
11343788 957 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 958 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 959 break;
960
961 case OP_POSTDEC:
11343788 962 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 963 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 964 break;
965
79072805
LW		 966 case OP_OR:
967 case OP_AND:
968 case OP_COND_EXPR:
11343788 969 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 970 scalarvoid(kid);
971 break;
5aabfad6 972
a0d0e21e 973 case OP_NULL:
11343788 974 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 975 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
11343788 976 if (o->op_flags & OPf_STACKED)
a0d0e21e 977 break;
5aabfad6 978 /* FALL THROUGH */
79072805
LW		 979 case OP_ENTERTRY:
980 case OP_ENTER:
981 case OP_SCALAR:
11343788 982 if (!(o->op_flags & OPf_KIDS))
79072805 983 break;
54310121 984 /* FALL THROUGH */
463ee0b2 985 case OP_SCOPE:
79072805
LW		 986 case OP_LEAVE:
987 case OP_LEAVETRY:
a0d0e21e 988 case OP_LEAVELOOP:
79072805 989 case OP_LINESEQ:
79072805 990 case OP_LIST:
11343788 991 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 992 scalarvoid(kid);
993 break;
c90c0ff4 994 case OP_ENTEREVAL:
5196be3e 995 scalarkids(o);
c90c0ff4 996 break;
5aabfad6 997 case OP_REQUIRE:
c90c0ff4 998 /* all requires must return a boolean value */
5196be3e
MB		 999 o->op_flags &= ~OPf_WANT;
1000 return scalar(o);
a0d0e21e 1001 case OP_SPLIT:
11343788 1002 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1003 if (!kPMOP->op_pmreplroot)
1004 deprecate("implicit split to @_");
1005 }
1006 break;
79072805 1007 }
d008e5eb
GS		 1008 if (useless) {
1009 dTHR;
1010 if (ckWARN(WARN_VOID))
1011 warner(WARN_VOID, "Useless use of %s in void context", useless);
1012 }
11343788 1013 return o;
79072805
LW		 1014}
1015
1016OP *
8ac85365 1017listkids(OP *o)
79072805
LW		 1018{
1019 OP *kid;
11343788
MB		 1020 if (o && o->op_flags & OPf_KIDS) {
1021 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1022 list(kid);
1023 }
11343788 1024 return o;
79072805
LW		 1025}
1026
1027OP *
8ac85365 1028list(OP *o)
79072805
LW		 1029{
1030 OP *kid;
1031
a0d0e21e 1032 /* assumes no premature commitment */
3280af22 1033 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1034 || o->op_type == OP_RETURN)
11343788 1035 return o;
79072805 1036
5dc0d613 1037 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1038
11343788 1039 switch (o->op_type) {
79072805
LW		 1040 case OP_FLOP:
1041 case OP_REPEAT:
11343788 1042 list(cBINOPo->op_first);
79072805
LW		 1043 break;
1044 case OP_OR:
1045 case OP_AND:
1046 case OP_COND_EXPR:
11343788 1047 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1048 list(kid);
1049 break;
1050 default:
1051 case OP_MATCH:
8782bef2 1052 case OP_QR:
79072805
LW		 1053 case OP_SUBST:
1054 case OP_NULL:
11343788 1055 if (!(o->op_flags & OPf_KIDS))
79072805 1056 break;
11343788
MB		 1057 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1058 list(cBINOPo->op_first);
1059 return gen_constant_list(o);
79072805
LW		 1060 }
1061 case OP_LIST:
11343788 1062 listkids(o);
79072805
LW		 1063 break;
1064 case OP_LEAVE:
1065 case OP_LEAVETRY:
5dc0d613 1066 kid = cLISTOPo->op_first;
54310121 1067 list(kid);
1068 while (kid = kid->op_sibling) {
1069 if (kid->op_sibling)
1070 scalarvoid(kid);
1071 else
1072 list(kid);
1073 }
3280af22 1074 WITH_THR(PL_curcop = &PL_compiling);
54310121 1075 break;
748a9306 1076 case OP_SCOPE:
79072805 1077 case OP_LINESEQ:
11343788 1078 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1079 if (kid->op_sibling)
1080 scalarvoid(kid);
1081 else
1082 list(kid);
1083 }
3280af22 1084 WITH_THR(PL_curcop = &PL_compiling);
79072805 1085 break;
c90c0ff4 1086 case OP_REQUIRE:
1087 /* all requires must return a boolean value */
5196be3e
MB		 1088 o->op_flags &= ~OPf_WANT;
1089 return scalar(o);
79072805 1090 }
11343788 1091 return o;
79072805
LW		 1092}
1093
1094OP *
8ac85365 1095scalarseq(OP *o)
79072805
LW		 1096{
1097 OP *kid;
1098
11343788
MB		 1099 if (o) {
1100 if (o->op_type == OP_LINESEQ ||
1101 o->op_type == OP_SCOPE ||
1102 o->op_type == OP_LEAVE ||
1103 o->op_type == OP_LEAVETRY)
463ee0b2 1104 {
0f15f207 1105 dTHR;
11343788 1106 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1107 if (kid->op_sibling) {
463ee0b2 1108 scalarvoid(kid);
ed6116ce 1109 }
463ee0b2 1110 }
3280af22 1111 PL_curcop = &PL_compiling;
79072805 1112 }
11343788 1113 o->op_flags &= ~OPf_PARENS;
3280af22 1114 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1115 o->op_flags |= OPf_PARENS;
79072805 1116 }
8990e307 1117 else
11343788
MB		 1118 o = newOP(OP_STUB, 0);
1119 return o;
79072805
LW		 1120}
1121
76e3520e 1122STATIC OP *
8ac85365 1123modkids(OP *o, I32 type)
79072805
LW		 1124{
1125 OP *kid;
11343788
MB		 1126 if (o && o->op_flags & OPf_KIDS) {
1127 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1128 mod(kid, type);
79072805 1129 }
11343788 1130 return o;
79072805
LW		 1131}
1132
79072805 1133OP *
8ac85365 1134mod(OP *o, I32 type)
79072805 1135{
11343788 1136 dTHR;
79072805
LW		 1137 OP *kid;
1138 SV *sv;
2d8e6c8d 1139 STRLEN n_a;
79072805 1140
3280af22 1141 if (!o || PL_error_count)
11343788 1142 return o;
79072805 1143
11343788 1144 switch (o->op_type) {
68dc0745 1145 case OP_UNDEF:
3280af22 1146 PL_modcount++;
5dc0d613 1147 return o;
a0d0e21e 1148 case OP_CONST:
11343788 1149 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1150 goto nomod;
3280af22
NIS		 1151 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1152 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1153 PL_eval_start = 0;
a0d0e21e
LW		 1154 }
1155 else if (!type) {
3280af22
NIS		 1156 SAVEI32(PL_compiling.cop_arybase);
1157 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1158 }
1159 else if (type == OP_REFGEN)
1160 goto nomod;
1161 else
1162 croak("That use of $[ is unsupported");
1163 break;
5f05dabc 1164 case OP_STUB:
5196be3e 1165 if (o->op_flags & OPf_PARENS)
5f05dabc 1166 break;
1167 goto nomod;
a0d0e21e
LW		 1168 case OP_ENTERSUB:
1169 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1170 !(o->op_flags & OPf_STACKED)) {
1171 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1172 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1173 assert(cUNOPo->op_first->op_type == OP_NULL);
1174 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1175 break;
1176 }
1177 /* FALL THROUGH */
1178 default:
a0d0e21e
LW		 1179 nomod:
1180 /* grep, foreach, subcalls, refgen */
1181 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1182 break;
46fc3d4c 1183 yyerror(form("Can't modify %s in %s",
638bc118 1184 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
22c35a8c
GS		 1185 ? "do block" : PL_op_desc[o->op_type]),
1186 type ? PL_op_desc[type] : "local"));
11343788 1187 return o;
79072805 1188
a0d0e21e
LW		 1189 case OP_PREINC:
1190 case OP_PREDEC:
1191 case OP_POW:
1192 case OP_MULTIPLY:
1193 case OP_DIVIDE:
1194 case OP_MODULO:
1195 case OP_REPEAT:
1196 case OP_ADD:
1197 case OP_SUBTRACT:
1198 case OP_CONCAT:
1199 case OP_LEFT_SHIFT:
1200 case OP_RIGHT_SHIFT:
1201 case OP_BIT_AND:
1202 case OP_BIT_XOR:
1203 case OP_BIT_OR:
1204 case OP_I_MULTIPLY:
1205 case OP_I_DIVIDE:
1206 case OP_I_MODULO:
1207 case OP_I_ADD:
1208 case OP_I_SUBTRACT:
11343788 1209 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1210 goto nomod;
3280af22 1211 PL_modcount++;
a0d0e21e
LW		 1212 break;
1213
79072805 1214 case OP_COND_EXPR:
11343788 1215 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1216 mod(kid, type);
79072805
LW		 1217 break;
1218
1219 case OP_RV2AV:
1220 case OP_RV2HV:
93af7a87 1221 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1222 croak("Can't localize through a reference");
11343788 1223 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1224 PL_modcount = 10000;
11343788 1225 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1226 }
1227 /* FALL THROUGH */
79072805 1228 case OP_RV2GV:
5dc0d613 1229 if (scalar_mod_type(o, type))
3fe9a6f1 1230 goto nomod;
11343788 1231 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1232 /* FALL THROUGH */
1233 case OP_AASSIGN:
1234 case OP_ASLICE:
1235 case OP_HSLICE:
93a17b20
LW		 1236 case OP_NEXTSTATE:
1237 case OP_DBSTATE:
a0d0e21e
LW		 1238 case OP_REFGEN:
1239 case OP_CHOMP:
3280af22 1240 PL_modcount = 10000;
79072805 1241 break;
463ee0b2 1242 case OP_RV2SV:
11343788 1243 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1244 croak("Can't localize through a reference");
aeea060c 1245 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1246 /* FALL THROUGH */
79072805 1247 case OP_GV:
463ee0b2 1248 case OP_AV2ARYLEN:
3280af22 1249 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1250 case OP_SASSIGN:
8990e307 1251 case OP_AELEMFAST:
3280af22 1252 PL_modcount++;
8990e307
LW		 1253 break;
1254
748a9306
LW		 1255 case OP_PADAV:
1256 case OP_PADHV:
3280af22 1257 PL_modcount = 10000;
5196be3e
MB		 1258 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1259 return o; /* Treat \(@foo) like ordinary list. */
1260 if (scalar_mod_type(o, type))
3fe9a6f1 1261 goto nomod;
748a9306
LW		 1262 /* FALL THROUGH */
1263 case OP_PADSV:
3280af22 1264 PL_modcount++;
748a9306
LW		 1265 if (!type)
1266 croak("Can't localize lexical variable %s",
2d8e6c8d 1267 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1268 break;
1269
554b3eca 1270#ifdef USE_THREADS
2faa37cc 1271 case OP_THREADSV:
533c011a 1272 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1273 break;
1274#endif /* USE_THREADS */
1275
748a9306
LW		 1276 case OP_PUSHMARK:
1277 break;
a0d0e21e 1278
69969c6f
SB		 1279 case OP_KEYS:
1280 if (type != OP_SASSIGN)
1281 goto nomod;
5d82c453
GA		 1282 goto lvalue_func;
1283 case OP_SUBSTR:
1284 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1285 goto nomod;
5f05dabc 1286 /* FALL THROUGH */
a0d0e21e 1287 case OP_POS:
463ee0b2 1288 case OP_VEC:
5d82c453 1289 lvalue_func:
11343788
MB		 1290 pad_free(o->op_targ);
1291 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1292 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1293 if (o->op_flags & OPf_KIDS)
1294 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1295 break;
a0d0e21e 1296
463ee0b2
LW		 1297 case OP_AELEM:
1298 case OP_HELEM:
11343788 1299 ref(cBINOPo->op_first, o->op_type);
68dc0745 1300 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1301 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1302 o->op_private |= OPpLVAL_DEFER;
3280af22 1303 PL_modcount++;
463ee0b2
LW		 1304 break;
1305
1306 case OP_SCOPE:
1307 case OP_LEAVE:
1308 case OP_ENTER:
11343788
MB		 1309 if (o->op_flags & OPf_KIDS)
1310 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1311 break;
1312
1313 case OP_NULL:
638bc118
GS		 1314 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1315 goto nomod;
1316 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1317 break;
11343788
MB		 1318 if (o->op_targ != OP_LIST) {
1319 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1320 break;
1321 }
1322 /* FALL THROUGH */
463ee0b2 1323 case OP_LIST:
11343788 1324 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1325 mod(kid, type);
1326 break;
1327 }
11343788 1328 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1329
1330 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1331 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1332 else if (!type) {
11343788
MB		 1333 o->op_private |= OPpLVAL_INTRO;
1334 o->op_flags &= ~OPf_SPECIAL;
3280af22 1335 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1336 }
a0d0e21e 1337 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1338 o->op_flags |= OPf_REF;
1339 return o;
463ee0b2
LW		 1340}
1341
3fe9a6f1 1342static bool
8ac85365 1343scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1344{
1345 switch (type) {
1346 case OP_SASSIGN:
5196be3e 1347 if (o->op_type == OP_RV2GV)
3fe9a6f1 1348 return FALSE;
1349 /* FALL THROUGH */
1350 case OP_PREINC:
1351 case OP_PREDEC:
1352 case OP_POSTINC:
1353 case OP_POSTDEC:
1354 case OP_I_PREINC:
1355 case OP_I_PREDEC:
1356 case OP_I_POSTINC:
1357 case OP_I_POSTDEC:
1358 case OP_POW:
1359 case OP_MULTIPLY:
1360 case OP_DIVIDE:
1361 case OP_MODULO:
1362 case OP_REPEAT:
1363 case OP_ADD:
1364 case OP_SUBTRACT:
1365 case OP_I_MULTIPLY:
1366 case OP_I_DIVIDE:
1367 case OP_I_MODULO:
1368 case OP_I_ADD:
1369 case OP_I_SUBTRACT:
1370 case OP_LEFT_SHIFT:
1371 case OP_RIGHT_SHIFT:
1372 case OP_BIT_AND:
1373 case OP_BIT_XOR:
1374 case OP_BIT_OR:
1375 case OP_CONCAT:
1376 case OP_SUBST:
1377 case OP_TRANS:
49e9fbe6
GS		 1378 case OP_READ:
1379 case OP_SYSREAD:
1380 case OP_RECV:
3fe9a6f1 1381 case OP_ANDASSIGN: /* may work later */
1382 case OP_ORASSIGN: /* may work later */
1383 return TRUE;
1384 default:
1385 return FALSE;
1386 }
1387}
1388
463ee0b2 1389OP *
8ac85365 1390refkids(OP *o, I32 type)
463ee0b2
LW		 1391{
1392 OP *kid;
11343788
MB		 1393 if (o && o->op_flags & OPf_KIDS) {
1394 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1395 ref(kid, type);
1396 }
11343788 1397 return o;
463ee0b2
LW		 1398}
1399
1400OP *
8ac85365 1401ref(OP *o, I32 type)
463ee0b2
LW		 1402{
1403 OP *kid;
463ee0b2 1404
3280af22 1405 if (!o || PL_error_count)
11343788 1406 return o;
463ee0b2 1407
11343788 1408 switch (o->op_type) {
a0d0e21e 1409 case OP_ENTERSUB:
e55aaa0e 1410 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1411 !(o->op_flags & OPf_STACKED)) {
1412 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1413 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1414 assert(cUNOPo->op_first->op_type == OP_NULL);
1415 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1416 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1417 }
1418 break;
aeea060c 1419
463ee0b2 1420 case OP_COND_EXPR:
11343788 1421 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1422 ref(kid, type);
1423 break;
8990e307 1424 case OP_RV2SV:
11343788 1425 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1426 /* FALL THROUGH */
1427 case OP_PADSV:
5f05dabc 1428 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1429 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1430 : type == OP_RV2HV ? OPpDEREF_HV
1431 : OPpDEREF_SV);
11343788 1432 o->op_flags |= OPf_MOD;
a0d0e21e 1433 }
8990e307
LW		 1434 break;
1435
2faa37cc 1436 case OP_THREADSV:
a863c7d1
MB		 1437 o->op_flags |= OPf_MOD; /* XXX ??? */
1438 break;
1439
463ee0b2
LW		 1440 case OP_RV2AV:
1441 case OP_RV2HV:
aeea060c 1442 o->op_flags |= OPf_REF;
8990e307 1443 /* FALL THROUGH */
463ee0b2 1444 case OP_RV2GV:
11343788 1445 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1446 break;
8990e307 1447
463ee0b2
LW		 1448 case OP_PADAV:
1449 case OP_PADHV:
aeea060c 1450 o->op_flags |= OPf_REF;
79072805 1451 break;
aeea060c 1452
8990e307 1453 case OP_SCALAR:
79072805 1454 case OP_NULL:
11343788 1455 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1456 break;
11343788 1457 ref(cBINOPo->op_first, type);
79072805
LW		 1458 break;
1459 case OP_AELEM:
1460 case OP_HELEM:
11343788 1461 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1462 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1463 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1464 : type == OP_RV2HV ? OPpDEREF_HV
1465 : OPpDEREF_SV);
11343788 1466 o->op_flags |= OPf_MOD;
8990e307 1467 }
79072805
LW		 1468 break;
1469
463ee0b2 1470 case OP_SCOPE:
79072805
LW		 1471 case OP_LEAVE:
1472 case OP_ENTER:
8990e307 1473 case OP_LIST:
11343788 1474 if (!(o->op_flags & OPf_KIDS))
79072805 1475 break;
11343788 1476 ref(cLISTOPo->op_last, type);
79072805 1477 break;
a0d0e21e
LW		 1478 default:
1479 break;
79072805 1480 }
11343788 1481 return scalar(o);
8990e307 1482
79072805
LW		 1483}
1484
1485OP *
8ac85365 1486my(OP *o)
93a17b20
LW		 1487{
1488 OP *kid;
93a17b20
LW		 1489 I32 type;
1490
3280af22 1491 if (!o || PL_error_count)
11343788 1492 return o;
93a17b20 1493
11343788 1494 type = o->op_type;
93a17b20 1495 if (type == OP_LIST) {
11343788 1496 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1497 my(kid);
dab48698 1498 } else if (type == OP_UNDEF) {
7766148a 1499 return o;
dab48698 1500 } else if (type != OP_PADSV &&
93a17b20
LW		 1501 type != OP_PADAV &&
1502 type != OP_PADHV &&
1503 type != OP_PUSHMARK)
1504 {
22c35a8c 1505 yyerror(form("Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1506 return o;
93a17b20 1507 }
11343788
MB		 1508 o->op_flags |= OPf_MOD;
1509 o->op_private |= OPpLVAL_INTRO;
1510 return o;
93a17b20
LW		 1511}
1512
1513OP *
8ac85365 1514sawparens(OP *o)
79072805
LW		 1515{
1516 if (o)
1517 o->op_flags |= OPf_PARENS;
1518 return o;
1519}
1520
1521OP *
8ac85365 1522bind_match(I32 type, OP *left, OP *right)
79072805 1523{
d008e5eb 1524 dTHR;
11343788 1525 OP *o;
79072805 1526
599cee73
PM		 1527 if (ckWARN(WARN_UNSAFE) &&
1528 (left->op_type == OP_RV2AV ||
1529 left->op_type == OP_RV2HV ||
1530 left->op_type == OP_PADAV ||
1531 left->op_type == OP_PADHV)) {
22c35a8c 1532 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1533 right->op_type == OP_TRANS)
1534 ? right->op_type : OP_MATCH];
1535 char *sample = ((left->op_type == OP_RV2AV ||
1536 left->op_type == OP_PADAV)
1537 ? "@array" : "%hash");
1538 warner(WARN_UNSAFE,
1539 "Applying %s to %s will act on scalar(%s)",
1540 desc, sample, sample);
2ae324a7 1541 }
1542
79072805
LW		 1543 if (right->op_type == OP_MATCH ||
1544 right->op_type == OP_SUBST ||
1545 right->op_type == OP_TRANS) {
1546 right->op_flags |= OPf_STACKED;
1547 if (right->op_type != OP_MATCH)
463ee0b2 1548 left = mod(left, right->op_type);
79072805 1549 if (right->op_type == OP_TRANS)
11343788 1550 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1551 else
11343788 1552 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1553 if (type == OP_NOT)
11343788
MB		 1554 return newUNOP(OP_NOT, 0, scalar(o));
1555 return o;
79072805
LW		 1556 }
1557 else
1558 return bind_match(type, left,
1559 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1560}
1561
1562OP *
8ac85365 1563invert(OP *o)
79072805 1564{
11343788
MB		 1565 if (!o)
1566 return o;
79072805 1567 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1568 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1569}
1570
1571OP *
8ac85365 1572scope(OP *o)
79072805
LW		 1573{
1574 if (o) {
3280af22 1575 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1576 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1577 o->op_type = OP_LEAVE;
22c35a8c 1578 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1579 }
1580 else {
1581 if (o->op_type == OP_LINESEQ) {
1582 OP *kid;
1583 o->op_type = OP_SCOPE;
22c35a8c 1584 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
463ee0b2 1585 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1586 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1587 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1588 null(kid);
748a9306 1589 }
463ee0b2
LW		 1590 }
1591 else
748a9306 1592 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1593 }
79072805
LW		 1594 }
1595 return o;
1596}
1597
b3ac6de7
IZ		 1598void
1599save_hints(void)
1600{
3280af22
NIS		 1601 SAVEI32(PL_hints);
1602 SAVESPTR(GvHV(PL_hintgv));
1603 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1604 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1605}
1606
a0d0e21e 1607int
8ac85365 1608block_start(int full)
79072805 1609{
11343788 1610 dTHR;
3280af22 1611 int retval = PL_savestack_ix;
b3ac6de7 1612
3280af22 1613 SAVEI32(PL_comppad_name_floor);
55497cff 1614 if (full) {
3280af22
NIS		 1615 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1616 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1617 else
3280af22
NIS		 1618 PL_comppad_name_floor = 0;
1619 }
1620 SAVEI32(PL_min_intro_pending);
1621 SAVEI32(PL_max_intro_pending);
1622 PL_min_intro_pending = 0;
1623 SAVEI32(PL_comppad_name_fill);
1624 SAVEI32(PL_padix_floor);
1625 PL_padix_floor = PL_padix;
1626 PL_pad_reset_pending = FALSE;
b3ac6de7 1627 SAVEHINTS();
3280af22 1628 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1629 SAVEPPTR(PL_compiling.cop_warnings);
599cee73
PM		 1630 if (PL_compiling.cop_warnings != WARN_ALL &&
1631 PL_compiling.cop_warnings != WARN_NONE) {
1632 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1633 SAVEFREESV(PL_compiling.cop_warnings) ;
1634 }
1635
1636
a0d0e21e
LW		 1637 return retval;
1638}
1639
1640OP*
8ac85365 1641block_end(I32 floor, OP *seq)
a0d0e21e 1642{
11343788 1643 dTHR;
3280af22 1644 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1645 OP* retval = scalarseq(seq);
a0d0e21e 1646 LEAVE_SCOPE(floor);
3280af22 1647 PL_pad_reset_pending = FALSE;
e24b16f9 1648 PL_compiling.op_private = PL_hints;
a0d0e21e 1649 if (needblockscope)
3280af22
NIS		 1650 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1651 pad_leavemy(PL_comppad_name_fill);
1652 PL_cop_seqmax++;
a0d0e21e
LW		 1653 return retval;
1654}
1655
76e3520e 1656STATIC OP *
54b9620d
MB		 1657newDEFSVOP(void)
1658{
1659#ifdef USE_THREADS
1660 OP *o = newOP(OP_THREADSV, 0);
1661 o->op_targ = find_threadsv("_");
1662 return o;
1663#else
3280af22 1664 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1665#endif /* USE_THREADS */
1666}
1667
a0d0e21e 1668void
8ac85365 1669newPROG(OP *o)
a0d0e21e 1670{
11343788 1671 dTHR;
3280af22
NIS		 1672 if (PL_in_eval) {
1673 PL_eval_root = newUNOP(OP_LEAVEEVAL, ((PL_in_eval & 4) ? OPf_SPECIAL : 0), o);
1674 PL_eval_start = linklist(PL_eval_root);
1675 PL_eval_root->op_next = 0;
1676 peep(PL_eval_start);
a0d0e21e
LW		 1677 }
1678 else {
5dc0d613 1679 if (!o)
a0d0e21e 1680 return;
3280af22
NIS		 1681 PL_main_root = scope(sawparens(scalarvoid(o)));
1682 PL_curcop = &PL_compiling;
1683 PL_main_start = LINKLIST(PL_main_root);
1684 PL_main_root->op_next = 0;
1685 peep(PL_main_start);
1686 PL_compcv = 0;
3841441e 1687
4fdae800 1688 /* Register with debugger */
84902520 1689 if (PERLDB_INTER) {
3841441e 1690 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1691 if (cv) {
1692 dSP;
924508f0 1693 PUSHMARK(SP);
3280af22 1694 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e
CS		 1695 PUTBACK;
1696 perl_call_sv((SV*)cv, G_DISCARD);
1697 }
1698 }
79072805 1699 }
79072805
LW		 1700}
1701
1702OP *
8ac85365 1703localize(OP *o, I32 lex)
79072805
LW		 1704{
1705 if (o->op_flags & OPf_PARENS)
1706 list(o);
8990e307 1707 else {
d008e5eb 1708 dTHR;
599cee73 1709 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1710 char *s;
834a4ddd 1711 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1712 if (*s == ';' || *s == '=')
752ebe84 1713 warner(WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 1714 lex ? "my" : "local");
8990e307
LW		 1715 }
1716 }
3280af22
NIS		 1717 PL_in_my = FALSE;
1718 PL_in_my_stash = Nullhv;
93a17b20
LW		 1719 if (lex)
1720 return my(o);
1721 else
463ee0b2 1722 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1723}
1724
1725OP *
8ac85365 1726jmaybe(OP *o)
79072805
LW		 1727{
1728 if (o->op_type == OP_LIST) {
554b3eca
MB		 1729 OP *o2;
1730#ifdef USE_THREADS
2faa37cc 1731 o2 = newOP(OP_THREADSV, 0);
54b9620d 1732 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1733#else
1734 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1735#endif /* USE_THREADS */
1736 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1737 }
1738 return o;
1739}
1740
1741OP *
8ac85365 1742fold_constants(register OP *o)
79072805 1743{
11343788 1744 dTHR;
79072805
LW		 1745 register OP *curop;
1746 I32 type = o->op_type;
748a9306 1747 SV *sv;
79072805 1748
22c35a8c 1749 if (PL_opargs[type] & OA_RETSCALAR)
79072805 1750 scalar(o);
22c35a8c 1751 if (PL_opargs[type] & OA_TARGET)
ed6116ce 1752 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1753
22c35a8c
GS		 1754 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER))
1755 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
85e6fe83 1756
22c35a8c 1757 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 1758 goto nope;
1759
de939608
CS		 1760 switch (type) {
1761 case OP_SPRINTF:
1762 case OP_UCFIRST:
1763 case OP_LCFIRST:
1764 case OP_UC:
1765 case OP_LC:
69dcf70c
MB		 1766 case OP_SLT:
1767 case OP_SGT:
1768 case OP_SLE:
1769 case OP_SGE:
1770 case OP_SCMP:
1771
de939608
CS		 1772 if (o->op_private & OPpLOCALE)
1773 goto nope;
1774 }
1775
3280af22 1776 if (PL_error_count)
a0d0e21e
LW		 1777 goto nope; /* Don't try to run w/ errors */
1778
79072805 1779 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1780 if (curop->op_type != OP_CONST &&
1781 curop->op_type != OP_LIST &&
1782 curop->op_type != OP_SCALAR &&
a0d0e21e 1783 curop->op_type != OP_NULL &&
93a17b20 1784 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1785 goto nope;
1786 }
1787 }
1788
1789 curop = LINKLIST(o);
1790 o->op_next = 0;
533c011a 1791 PL_op = curop;
76e3520e 1792 CALLRUNOPS();
3280af22 1793 sv = *(PL_stack_sp--);
748a9306 1794 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1795 pad_swipe(o->op_targ);
748a9306
LW		 1796 else if (SvTEMP(sv)) { /* grab mortal temp? */
1797 (void)SvREFCNT_inc(sv);
1798 SvTEMP_off(sv);
85e6fe83 1799 }
79072805
LW		 1800 op_free(o);
1801 if (type == OP_RV2GV)
b1cb66bf 1802 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1803 else {
ee580363
GS		 1804 /* try to smush double to int, but don't smush -2.0 to -2 */
1805 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1806 type != OP_NEGATE)
1807 {
748a9306 1808 IV iv = SvIV(sv);
ee580363 1809 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1810 SvREFCNT_dec(sv);
1811 sv = newSViv(iv);
1812 }
b1cb66bf 1813 else
1814 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1815 }
1816 return newSVOP(OP_CONST, 0, sv);
1817 }
aeea060c 1818
79072805 1819 nope:
22c35a8c 1820 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 1821 return o;
79072805 1822
3280af22 1823 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1824 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1825 return o;
1826
1827 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1828 if (curop->op_type == OP_CONST) {
b1cb66bf 1829 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1830 continue;
1831 return o;
1832 }
22c35a8c 1833 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1834 continue;
1835 return o;
1836 }
22c35a8c 1837 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 1838 }
1839
79072805
LW		 1840 return o;
1841}
1842
1843OP *
8ac85365 1844gen_constant_list(register OP *o)
79072805 1845{
11343788 1846 dTHR;
79072805 1847 register OP *curop;
3280af22 1848 I32 oldtmps_floor = PL_tmps_floor;
79072805 1849
a0d0e21e 1850 list(o);
3280af22 1851 if (PL_error_count)
a0d0e21e
LW		 1852 return o; /* Don't attempt to run with errors */
1853
533c011a 1854 PL_op = curop = LINKLIST(o);
a0d0e21e 1855 o->op_next = 0;
11343788 1856 pp_pushmark(ARGS);
76e3520e 1857 CALLRUNOPS();
533c011a 1858 PL_op = curop;
11343788 1859 pp_anonlist(ARGS);
3280af22 1860 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1861
1862 o->op_type = OP_RV2AV;
22c35a8c 1863 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 1864 curop = ((UNOP*)o)->op_first;
3280af22 1865 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1866 op_free(curop);
79072805
LW		 1867 linklist(o);
1868 return list(o);
1869}
1870
1871OP *
8ac85365 1872convert(I32 type, I32 flags, OP *o)
79072805
LW		 1873{
1874 OP *kid;
a0d0e21e 1875 OP *last = 0;
79072805 1876
11343788
MB		 1877 if (!o || o->op_type != OP_LIST)
1878 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1879 else
5dc0d613 1880 o->op_flags &= ~OPf_WANT;
79072805 1881
22c35a8c 1882 if (!(PL_opargs[type] & OA_MARK))
11343788 1883 null(cLISTOPo->op_first);
8990e307 1884
11343788 1885 o->op_type = type;
22c35a8c 1886 o->op_ppaddr = PL_ppaddr[type];
11343788 1887 o->op_flags |= flags;
79072805 1888
11343788
MB		 1889 o = CHECKOP(type, o);
1890 if (o->op_type != type)
1891 return o;
79072805 1892
11343788 1893 if (cLISTOPo->op_children < 7) {
79072805 1894 /* XXX do we really need to do this if we're done appending?? */
11343788 1895 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1896 last = kid;
11343788 1897 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1898 }
1899
11343788 1900 return fold_constants(o);
79072805
LW		 1901}
1902
1903/* List constructors */
1904
1905OP *
8ac85365 1906append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1907{
1908 if (!first)
1909 return last;
8990e307
LW		 1910
1911 if (!last)
79072805 1912 return first;
8990e307 1913
a0d0e21e
LW		 1914 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1915 return newLISTOP(type, 0, first, last);
79072805 1916
a0d0e21e
LW		 1917 if (first->op_flags & OPf_KIDS)
1918 ((LISTOP*)first)->op_last->op_sibling = last;
1919 else {
1920 first->op_flags |= OPf_KIDS;
1921 ((LISTOP*)first)->op_first = last;
1922 }
1923 ((LISTOP*)first)->op_last = last;
1924 ((LISTOP*)first)->op_children++;
1925 return first;
79072805
LW		 1926}
1927
1928OP *
8ac85365 1929append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1930{
1931 if (!first)
1932 return (OP*)last;
8990e307
LW		 1933
1934 if (!last)
79072805 1935 return (OP*)first;
8990e307
LW		 1936
1937 if (first->op_type != type)
79072805 1938 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1939
1940 if (last->op_type != type)
79072805
LW		 1941 return append_elem(type, (OP*)first, (OP*)last);
1942
1943 first->op_last->op_sibling = last->op_first;
1944 first->op_last = last->op_last;
1945 first->op_children += last->op_children;
1946 if (first->op_children)
acb74605 1947 first->op_flags |= OPf_KIDS;
79072805
LW		 1948
1949 Safefree(last);
1950 return (OP*)first;
1951}
1952
1953OP *
8ac85365 1954prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1955{
1956 if (!first)
1957 return last;
8990e307
LW		 1958
1959 if (!last)
79072805 1960 return first;
8990e307
LW		 1961
1962 if (last->op_type == type) {
1963 if (type == OP_LIST) { /* already a PUSHMARK there */
1964 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1965 ((LISTOP*)last)->op_first->op_sibling = first;
1966 }
1967 else {
1968 if (!(last->op_flags & OPf_KIDS)) {
1969 ((LISTOP*)last)->op_last = first;
1970 last->op_flags |= OPf_KIDS;
1971 }
1972 first->op_sibling = ((LISTOP*)last)->op_first;
1973 ((LISTOP*)last)->op_first = first;
79072805 1974 }
79072805
LW		 1975 ((LISTOP*)last)->op_children++;
1976 return last;
1977 }
1978
1979 return newLISTOP(type, 0, first, last);
1980}
1981
1982/* Constructors */
1983
1984OP *
8ac85365 1985newNULLLIST(void)
79072805 1986{
8990e307
LW		 1987 return newOP(OP_STUB, 0);
1988}
1989
1990OP *
8ac85365 1991force_list(OP *o)
8990e307 1992{
11343788
MB		 1993 if (!o || o->op_type != OP_LIST)
1994 o = newLISTOP(OP_LIST, 0, o, Nullop);
1995 null(o);
1996 return o;
79072805
LW		 1997}
1998
1999OP *
8ac85365 2000newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2001{
2002 LISTOP *listop;
2003
2004 Newz(1101, listop, 1, LISTOP);
2005
2006 listop->op_type = type;
22c35a8c 2007 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2008 listop->op_children = (first != 0) + (last != 0);
2009 listop->op_flags = flags;
79072805
LW		 2010
2011 if (!last && first)
2012 last = first;
2013 else if (!first && last)
2014 first = last;
8990e307
LW		 2015 else if (first)
2016 first->op_sibling = last;
79072805
LW		 2017 listop->op_first = first;
2018 listop->op_last = last;
8990e307
LW		 2019 if (type == OP_LIST) {
2020 OP* pushop;
2021 pushop = newOP(OP_PUSHMARK, 0);
2022 pushop->op_sibling = first;
2023 listop->op_first = pushop;
2024 listop->op_flags |= OPf_KIDS;
2025 if (!last)
2026 listop->op_last = pushop;
2027 }
2028 else if (listop->op_children)
2029 listop->op_flags |= OPf_KIDS;
79072805
LW		 2030
2031 return (OP*)listop;
2032}
2033
2034OP *
8ac85365 2035newOP(I32 type, I32 flags)
79072805 2036{
11343788
MB		 2037 OP *o;
2038 Newz(1101, o, 1, OP);
2039 o->op_type = type;
22c35a8c 2040 o->op_ppaddr = PL_ppaddr[type];
11343788 2041 o->op_flags = flags;
79072805 2042
11343788
MB		 2043 o->op_next = o;
2044 o->op_private = 0 + (flags >> 8);
22c35a8c 2045 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2046 scalar(o);
22c35a8c 2047 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2048 o->op_targ = pad_alloc(type, SVs_PADTMP);
2049 return CHECKOP(type, o);
79072805
LW		 2050}
2051
2052OP *
8ac85365 2053newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 2054{
2055 UNOP *unop;
2056
93a17b20 2057 if (!first)
aeea060c 2058 first = newOP(OP_STUB, 0);
22c35a8c 2059 if (PL_opargs[type] & OA_MARK)
8990e307 2060 first = force_list(first);
93a17b20 2061
79072805
LW		 2062 Newz(1101, unop, 1, UNOP);
2063 unop->op_type = type;
22c35a8c 2064 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2065 unop->op_first = first;
2066 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2067 unop->op_private = 1 | (flags >> 8);
e50aee73 2068 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2069 if (unop->op_next)
2070 return (OP*)unop;
2071
a0d0e21e 2072 return fold_constants((OP *) unop);
79072805
LW		 2073}
2074
2075OP *
8ac85365 2076newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2077{
2078 BINOP *binop;
2079 Newz(1101, binop, 1, BINOP);
2080
2081 if (!first)
2082 first = newOP(OP_NULL, 0);
2083
2084 binop->op_type = type;
22c35a8c 2085 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2086 binop->op_first = first;
2087 binop->op_flags = flags | OPf_KIDS;
2088 if (!last) {
2089 last = first;
c07a80fd 2090 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2091 }
2092 else {
c07a80fd 2093 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2094 first->op_sibling = last;
2095 }
2096
e50aee73 2097 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2098 if (binop->op_next)
2099 return (OP*)binop;
2100
7284ab6f 2101 binop->op_last = binop->op_first->op_sibling;
79072805 2102
a0d0e21e 2103 return fold_constants((OP *)binop);
79072805
LW		 2104}
2105
a0ed51b3
LW		 2106static int
2107utf8compare(const void *a, const void *b)
2108{
2109 int i;
2110 for (i = 0; i < 10; i++) {
2111 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2112 return -1;
2113 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2114 return 1;
2115 }
2116 return 0;
2117}
2118
79072805 2119OP *
8ac85365 2120pmtrans(OP *o, OP *expr, OP *repl)
79072805 2121{
79072805
LW		 2122 SV *tstr = ((SVOP*)expr)->op_sv;
2123 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2124 STRLEN tlen;
2125 STRLEN rlen;
ec49126f 2126 register U8 *t = (U8*)SvPV(tstr, tlen);
2127 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2128 register I32 i;
2129 register I32 j;
a0ed51b3 2130 I32 del;
79072805 2131 I32 complement;
5d06d08e 2132 I32 squash;
79072805
LW		 2133 register short *tbl;
2134
11343788 2135 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2136 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2137 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2138
a0ed51b3
LW		 2139 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
2140 SV* listsv = newSVpv("# comment\n",0);
2141 SV* transv = 0;
2142 U8* tend = t + tlen;
2143 U8* rend = r + rlen;
2144 I32 ulen;
2145 U32 tfirst = 1;
2146 U32 tlast = 0;
2147 I32 tdiff;
2148 U32 rfirst = 1;
2149 U32 rlast = 0;
2150 I32 rdiff;
2151 I32 diff;
2152 I32 none = 0;
2153 U32 max = 0;
2154 I32 bits;
2155 I32 grows = 0;
2156 I32 havefinal = 0;
2157 U32 final;
2158 HV *hv;
2159 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2160 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2161
2162 if (complement) {
2163 U8 tmpbuf[10];
2164 U8** cp;
2165 UV nextmin = 0;
2166 New(1109, cp, tlen, U8*);
2167 i = 0;
2168 transv = newSVpv("",0);
2169 while (t < tend) {
2170 cp[i++] = t;
2171 t += UTF8SKIP(t);
2172 if (*t == 0xff) {
2173 t++;
2174 t += UTF8SKIP(t);
2175 }
2176 }
2177 qsort(cp, i, sizeof(U8*), utf8compare);
2178 for (j = 0; j < i; j++) {
2179 U8 *s = cp[j];
2180 UV val = utf8_to_uv(s, &ulen);
2181 s += ulen;
2182 diff = val - nextmin;
2183 if (diff > 0) {
2184 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2185 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2186 if (diff > 1) {
2187 t = uv_to_utf8(tmpbuf, val - 1);
2188 sv_catpvn(transv, "\377", 1);
dfe13c55 2189 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2190 }
2191 }
2192 if (*s == 0xff)
2193 val = utf8_to_uv(s+1, &ulen);
2194 if (val >= nextmin)
2195 nextmin = val + 1;
2196 }
2197 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2198 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2199 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2200 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2201 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2202 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2203 tlen = SvCUR(transv);
2204 tend = t + tlen;
2205 }
2206 else if (!rlen && !del) {
2207 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2208 }
2209 if (!squash) {
2210 if (to_utf && from_utf) { /* only counting characters */
2211 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2212 o->op_private |= OPpTRANS_IDENTICAL;
2213 }
2214 else { /* straight latin-1 translation */
2215 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2216 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2217 o->op_private |= OPpTRANS_IDENTICAL;
2218 }
a0ed51b3
LW		 2219 }
2220
2221 while (t < tend || tfirst <= tlast) {
2222 /* see if we need more "t" chars */
2223 if (tfirst > tlast) {
2224 tfirst = (I32)utf8_to_uv(t, &ulen);
2225 t += ulen;
2226 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2227 tlast = (I32)utf8_to_uv(++t, &ulen);
2228 t += ulen;
2229 }
2230 else
2231 tlast = tfirst;
2232 }
2233
2234 /* now see if we need more "r" chars */
2235 if (rfirst > rlast) {
2236 if (r < rend) {
2237 rfirst = (I32)utf8_to_uv(r, &ulen);
2238 r += ulen;
2239 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2240 rlast = (I32)utf8_to_uv(++r, &ulen);
2241 r += ulen;
2242 }
2243 else
2244 rlast = rfirst;
2245 }
2246 else {
2247 if (!havefinal++)
2248 final = rlast;
2249 rfirst = rlast = 0xffffffff;
2250 }
2251 }
2252
2253 /* now see which range will peter our first, if either. */
2254 tdiff = tlast - tfirst;
2255 rdiff = rlast - rfirst;
2256
2257 if (tdiff <= rdiff)
2258 diff = tdiff;
2259 else
2260 diff = rdiff;
2261
2262 if (rfirst == 0xffffffff) {
2263 diff = tdiff; /* oops, pretend rdiff is infinite */
2264 if (diff > 0)
2265 sv_catpvf(listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
2266 else
2267 sv_catpvf(listsv, "%04x\t\tXXXX\n", tfirst);
2268 }
2269 else {
2270 if (diff > 0)
2271 sv_catpvf(listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
2272 else
2273 sv_catpvf(listsv, "%04x\t\t%04x\n", tfirst, rfirst);
2274
2275 if (rfirst + diff > max)
2276 max = rfirst + diff;
2277 rfirst += diff + 1;
2278 if (!grows) {
2279 if (rfirst <= 0x80)
2280 ;
2281 else if (rfirst <= 0x800)
2282 grows |= (tfirst < 0x80);
2283 else if (rfirst <= 0x10000)
2284 grows |= (tfirst < 0x800);
2285 else if (rfirst <= 0x200000)
2286 grows |= (tfirst < 0x10000);
2287 else if (rfirst <= 0x4000000)
2288 grows |= (tfirst < 0x200000);
2289 else if (rfirst <= 0x80000000)
2290 grows |= (tfirst < 0x4000000);
2291 }
2292 }
2293 tfirst += diff + 1;
2294 }
2295
2296 none = ++max;
2297 if (del)
2298 del = ++max;
2299
2300 if (max > 0xffff)
2301 bits = 32;
2302 else if (max > 0xff)
2303 bits = 16;
2304 else
2305 bits = 8;
2306
2307 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2308 SvREFCNT_dec(listsv);
2309 if (transv)
2310 SvREFCNT_dec(transv);
2311
2312 if (!del && havefinal)
2313 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2314
2315 if (grows && to_utf)
2316 o->op_private |= OPpTRANS_GROWS;
2317
2318 op_free(expr);
2319 op_free(repl);
2320 return o;
2321 }
2322
2323 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2324 if (complement) {
2325 Zero(tbl, 256, short);
2326 for (i = 0; i < tlen; i++)
ec49126f 2327 tbl[t[i]] = -1;
79072805
LW		 2328 for (i = 0, j = 0; i < 256; i++) {
2329 if (!tbl[i]) {
2330 if (j >= rlen) {
a0ed51b3 2331 if (del)
79072805
LW		 2332 tbl[i] = -2;
2333 else if (rlen)
ec49126f 2334 tbl[i] = r[j-1];
79072805
LW		 2335 else
2336 tbl[i] = i;
2337 }
2338 else
ec49126f 2339 tbl[i] = r[j++];
79072805
LW		 2340 }
2341 }
2342 }
2343 else {
a0ed51b3 2344 if (!rlen && !del) {
79072805 2345 r = t; rlen = tlen;
5d06d08e 2346 if (!squash)
4757a243 2347 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2348 }
2349 for (i = 0; i < 256; i++)
2350 tbl[i] = -1;
2351 for (i = 0, j = 0; i < tlen; i++,j++) {
2352 if (j >= rlen) {
a0ed51b3 2353 if (del) {
ec49126f 2354 if (tbl[t[i]] == -1)
2355 tbl[t[i]] = -2;
79072805
LW		 2356 continue;
2357 }
2358 --j;
2359 }
ec49126f 2360 if (tbl[t[i]] == -1)
2361 tbl[t[i]] = r[j];
79072805
LW		 2362 }
2363 }
2364 op_free(expr);
2365 op_free(repl);
2366
11343788 2367 return o;
79072805
LW		 2368}
2369
2370OP *
8ac85365 2371newPMOP(I32 type, I32 flags)
79072805 2372{
11343788 2373 dTHR;
79072805
LW		 2374 PMOP *pmop;
2375
2376 Newz(1101, pmop, 1, PMOP);
2377 pmop->op_type = type;
22c35a8c 2378 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2379 pmop->op_flags = flags;
c07a80fd 2380 pmop->op_private = 0 | (flags >> 8);
79072805 2381
3280af22 2382 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2383 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2384 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2385 pmop->op_pmpermflags |= PMf_LOCALE;
2386 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2387
79072805 2388 /* link into pm list */
3280af22
NIS		 2389 if (type != OP_TRANS && PL_curstash) {
2390 pmop->op_pmnext = HvPMROOT(PL_curstash);
2391 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2392 }
2393
2394 return (OP*)pmop;
2395}
2396
2397OP *
8ac85365 2398pmruntime(OP *o, OP *expr, OP *repl)
79072805 2399{
5c0ca799 2400 dTHR;
79072805
LW		 2401 PMOP *pm;
2402 LOGOP *rcop;
ce862d02 2403 I32 repl_has_vars = 0;
79072805 2404
11343788
MB		 2405 if (o->op_type == OP_TRANS)
2406 return pmtrans(o, expr, repl);
79072805 2407
3280af22 2408 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2409 pm = (PMOP*)o;
79072805
LW		 2410
2411 if (expr->op_type == OP_CONST) {
463ee0b2 2412 STRLEN plen;
79072805 2413 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2414 char *p = SvPV(pat, plen);
11343788 2415 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2416 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2417 p = SvPV(pat, plen);
79072805
LW		 2418 pm->op_pmflags |= PMf_SKIPWHITE;
2419 }
15e52e56 2420 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2421 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2422 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2423 op_free(expr);
2424 }
2425 else {
3280af22
NIS		 2426 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2427 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2428 ? OP_REGCRESET
2429 : OP_REGCMAYBE),0,expr);
463ee0b2 2430
79072805
LW		 2431 Newz(1101, rcop, 1, LOGOP);
2432 rcop->op_type = OP_REGCOMP;
22c35a8c 2433 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2434 rcop->op_first = scalar(expr);
3280af22 2435 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2436 ? (OPf_SPECIAL | OPf_KIDS)
2437 : OPf_KIDS);
79072805 2438 rcop->op_private = 1;
11343788 2439 rcop->op_other = o;
79072805
LW		 2440
2441 /* establish postfix order */
3280af22 2442 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2443 LINKLIST(expr);
2444 rcop->op_next = expr;
2445 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2446 }
2447 else {
2448 rcop->op_next = LINKLIST(expr);
2449 expr->op_next = (OP*)rcop;
2450 }
79072805 2451
11343788 2452 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2453 }
2454
2455 if (repl) {
748a9306
LW		 2456 OP *curop;
2457 if (pm->op_pmflags & PMf_EVAL)
2458 curop = 0;
554b3eca 2459#ifdef USE_THREADS
2faa37cc 2460 else if (repl->op_type == OP_THREADSV
554b3eca 2461 && strchr("&`'123456789+",
533c011a 2462 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2463 {
2464 curop = 0;
2465 }
2466#endif /* USE_THREADS */
748a9306
LW		 2467 else if (repl->op_type == OP_CONST)
2468 curop = repl;
79072805 2469 else {
79072805
LW		 2470 OP *lastop = 0;
2471 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2472 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2473#ifdef USE_THREADS
ce862d02
IZ		 2474 if (curop->op_type == OP_THREADSV) {
2475 repl_has_vars = 1;
be949f6f 2476 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2477 break;
554b3eca
MB		 2478 }
2479#else
79072805
LW		 2480 if (curop->op_type == OP_GV) {
2481 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2482 repl_has_vars = 1;
93a17b20 2483 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2484 break;
2485 }
554b3eca 2486#endif /* USE_THREADS */
79072805
LW		 2487 else if (curop->op_type == OP_RV2CV)
2488 break;
2489 else if (curop->op_type == OP_RV2SV ||
2490 curop->op_type == OP_RV2AV ||
2491 curop->op_type == OP_RV2HV ||
2492 curop->op_type == OP_RV2GV) {
2493 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2494 break;
2495 }
748a9306
LW		 2496 else if (curop->op_type == OP_PADSV ||
2497 curop->op_type == OP_PADAV ||
2498 curop->op_type == OP_PADHV ||
554b3eca 2499 curop->op_type == OP_PADANY) {
ce862d02 2500 repl_has_vars = 1;
748a9306 2501 }
1167e5da
SM		 2502 else if (curop->op_type == OP_PUSHRE)
2503 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2504 else
2505 break;
2506 }
2507 lastop = curop;
2508 }
748a9306 2509 }
ce862d02
IZ		 2510 if (curop == repl
2511 && !(repl_has_vars
2512 && (!pm->op_pmregexp
2513 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2514 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2515 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2516 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2517 }
2518 else {
ce862d02
IZ		 2519 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2520 pm->op_pmflags |= PMf_MAYBE_CONST;
2521 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2522 }
748a9306
LW		 2523 Newz(1101, rcop, 1, LOGOP);
2524 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2525 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2526 rcop->op_first = scalar(repl);
2527 rcop->op_flags |= OPf_KIDS;
2528 rcop->op_private = 1;
11343788 2529 rcop->op_other = o;
748a9306
LW		 2530
2531 /* establish postfix order */
2532 rcop->op_next = LINKLIST(repl);
2533 repl->op_next = (OP*)rcop;
2534
2535 pm->op_pmreplroot = scalar((OP*)rcop);
2536 pm->op_pmreplstart = LINKLIST(rcop);
2537 rcop->op_next = 0;
79072805
LW		 2538 }
2539 }
2540
2541 return (OP*)pm;
2542}
2543
2544OP *
8ac85365 2545newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2546{
2547 SVOP *svop;
2548 Newz(1101, svop, 1, SVOP);
2549 svop->op_type = type;
22c35a8c 2550 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2551 svop->op_sv = sv;
2552 svop->op_next = (OP*)svop;
2553 svop->op_flags = flags;
22c35a8c 2554 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2555 scalar((OP*)svop);
22c35a8c 2556 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2557 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2558 return CHECKOP(type, svop);
79072805
LW		 2559}
2560
2561OP *
8ac85365 2562newGVOP(I32 type, I32 flags, GV *gv)
79072805 2563{
11343788 2564 dTHR;
79072805
LW		 2565 GVOP *gvop;
2566 Newz(1101, gvop, 1, GVOP);
2567 gvop->op_type = type;
22c35a8c 2568 gvop->op_ppaddr = PL_ppaddr[type];
8990e307 2569 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2570 gvop->op_next = (OP*)gvop;
2571 gvop->op_flags = flags;
22c35a8c 2572 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2573 scalar((OP*)gvop);
22c35a8c 2574 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2575 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2576 return CHECKOP(type, gvop);
79072805
LW		 2577}
2578
2579OP *
8ac85365 2580newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2581{
2582 PVOP *pvop;
2583 Newz(1101, pvop, 1, PVOP);
2584 pvop->op_type = type;
22c35a8c 2585 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2586 pvop->op_pv = pv;
2587 pvop->op_next = (OP*)pvop;
2588 pvop->op_flags = flags;
22c35a8c 2589 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2590 scalar((OP*)pvop);
22c35a8c 2591 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2592 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2593 return CHECKOP(type, pvop);
79072805
LW		 2594}
2595
79072805 2596void
8ac85365 2597package(OP *o)
79072805 2598{
11343788 2599 dTHR;
93a17b20 2600 SV *sv;
79072805 2601
3280af22
NIS		 2602 save_hptr(&PL_curstash);
2603 save_item(PL_curstname);
11343788 2604 if (o) {
463ee0b2
LW		 2605 STRLEN len;
2606 char *name;
11343788 2607 sv = cSVOPo->op_sv;
463ee0b2 2608 name = SvPV(sv, len);
3280af22
NIS		 2609 PL_curstash = gv_stashpvn(name,len,TRUE);
2610 sv_setpvn(PL_curstname, name, len);
11343788 2611 op_free(o);
93a17b20
LW		 2612 }
2613 else {
3280af22
NIS		 2614 sv_setpv(PL_curstname,"<none>");
2615 PL_curstash = Nullhv;
93a17b20 2616 }
7ad382f4 2617 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2618 PL_copline = NOLINE;
2619 PL_expect = XSTATE;
79072805
LW		 2620}
2621
85e6fe83 2622void
8ac85365 2623utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2624{
a0d0e21e
LW		 2625 OP *pack;
2626 OP *meth;
2627 OP *rqop;
2628 OP *imop;
b1cb66bf 2629 OP *veop;
78ca652e 2630 GV *gv;
85e6fe83 2631
a0d0e21e
LW		 2632 if (id->op_type != OP_CONST)
2633 croak("Module name must be constant");
85e6fe83 2634
b1cb66bf 2635 veop = Nullop;
2636
2637 if(version != Nullop) {
2638 SV *vesv = ((SVOP*)version)->op_sv;
2639
2640 if (arg == Nullop && !SvNIOK(vesv)) {
2641 arg = version;
2642 }
2643 else {
2644 OP *pack;
2645 OP *meth;
2646
2647 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2648 croak("Version number must be constant number");
2649
2650 /* Make copy of id so we don't free it twice */
2651 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2652
2653 /* Fake up a method call to VERSION */
2654 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2655 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2656 append_elem(OP_LIST,
2657 prepend_elem(OP_LIST, pack, list(version)),
2658 newUNOP(OP_METHOD, 0, meth)));
2659 }
2660 }
aeea060c 2661
a0d0e21e 2662 /* Fake up an import/unimport */
4633a7c4
LW		 2663 if (arg && arg->op_type == OP_STUB)
2664 imop = arg; /* no import on explicit () */
b1cb66bf 2665 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2666 imop = Nullop; /* use 5.0; */
2667 }
4633a7c4
LW		 2668 else {
2669 /* Make copy of id so we don't free it twice */
2670 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2671 meth = newSVOP(OP_CONST, 0,
2672 aver
2673 ? newSVpv("import", 6)
2674 : newSVpv("unimport", 8)
2675 );
2676 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2677 append_elem(OP_LIST,
2678 prepend_elem(OP_LIST, pack, list(arg)),
2679 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2680 }
2681
78ca652e
GS		 2682 /* Fake up a require, handle override, if any */
2683 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2684 if (!(gv && GvIMPORTED_CV(gv)))
2685 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2686
2687 if (gv && GvIMPORTED_CV(gv)) {
2688 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2689 append_elem(OP_LIST, id,
2690 scalar(newUNOP(OP_RV2CV, 0,
2691 newGVOP(OP_GV, 0,
2692 gv))))));
2693 }
2694 else {
2695 rqop = newUNOP(OP_REQUIRE, 0, id);
2696 }
a0d0e21e
LW		 2697
2698 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2699 newSUB(floor,
a0d0e21e 2700 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2701 Nullop,
a0d0e21e 2702 append_elem(OP_LINESEQ,
b1cb66bf 2703 append_elem(OP_LINESEQ,
2704 newSTATEOP(0, Nullch, rqop),
2705 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2706 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2707
3280af22
NIS		 2708 PL_copline = NOLINE;
2709 PL_expect = XSTATE;
85e6fe83
LW		 2710}
2711
79072805 2712OP *
78ca652e
GS		 2713dofile(OP *term)
2714{
2715 OP *doop;
2716 GV *gv;
2717
2718 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2719 if (!(gv && GvIMPORTED_CV(gv)))
2720 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2721
2722 if (gv && GvIMPORTED_CV(gv)) {
2723 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2724 append_elem(OP_LIST, term,
2725 scalar(newUNOP(OP_RV2CV, 0,
2726 newGVOP(OP_GV, 0,
2727 gv))))));
2728 }
2729 else {
2730 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2731 }
2732 return doop;
2733}
2734
2735OP *
8ac85365 2736newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2737{
2738 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2739 list(force_list(subscript)),
2740 list(force_list(listval)) );
79072805
LW		 2741}
2742
76e3520e 2743STATIC I32
8ac85365 2744list_assignment(register OP *o)
79072805 2745{
11343788 2746 if (!o)
79072805
LW		 2747 return TRUE;
2748
11343788
MB		 2749 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2750 o = cUNOPo->op_first;
79072805 2751
11343788
MB		 2752 if (o->op_type == OP_COND_EXPR) {
2753 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2754 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2755
2756 if (t && f)
2757 return TRUE;
2758 if (t || f)
2759 yyerror("Assignment to both a list and a scalar");
2760 return FALSE;
2761 }
2762
11343788
MB		 2763 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2764 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2765 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2766 return TRUE;
2767
11343788 2768 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2769 return TRUE;
2770
11343788 2771 if (o->op_type == OP_RV2SV)
79072805
LW		 2772 return FALSE;
2773
2774 return FALSE;
2775}
2776
2777OP *
8ac85365 2778newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2779{
11343788 2780 OP *o;
79072805 2781
a0d0e21e
LW		 2782 if (optype) {
2783 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2784 return newLOGOP(optype, 0,
2785 mod(scalar(left), optype),
2786 newUNOP(OP_SASSIGN, 0, scalar(right)));
2787 }
2788 else {
2789 return newBINOP(optype, OPf_STACKED,
2790 mod(scalar(left), optype), scalar(right));
2791 }
2792 }
2793
79072805 2794 if (list_assignment(left)) {
6ee623d5 2795 dTHR;
3280af22
NIS		 2796 PL_modcount = 0;
2797 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2798 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2799 if (PL_eval_start)
2800 PL_eval_start = 0;
748a9306 2801 else {
a0d0e21e
LW		 2802 op_free(left);
2803 op_free(right);
2804 return Nullop;
2805 }
11343788 2806 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2807 list(force_list(right)),
2808 list(force_list(left)) );
11343788 2809 o->op_private = 0 | (flags >> 8);
a0d0e21e 2810 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2811 OP *curop;
11343788 2812 OP *lastop = o;
3280af22 2813 PL_generation++;
11343788 2814 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 2815 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805
LW		 2816 if (curop->op_type == OP_GV) {
2817 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2818 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2819 break;
3280af22 2820 SvCUR(gv) = PL_generation;
79072805 2821 }
748a9306
LW		 2822 else if (curop->op_type == OP_PADSV ||
2823 curop->op_type == OP_PADAV ||
2824 curop->op_type == OP_PADHV ||
2825 curop->op_type == OP_PADANY) {
3280af22 2826 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2827 SV *sv = svp[curop->op_targ];
3280af22 2828 if (SvCUR(sv) == PL_generation)
748a9306 2829 break;
3280af22 2830 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2831 }
79072805
LW		 2832 else if (curop->op_type == OP_RV2CV)
2833 break;
2834 else if (curop->op_type == OP_RV2SV ||
2835 curop->op_type == OP_RV2AV ||
2836 curop->op_type == OP_RV2HV ||
2837 curop->op_type == OP_RV2GV) {
2838 if (lastop->op_type != OP_GV) /* funny deref? */
2839 break;
2840 }
1167e5da
SM		 2841 else if (curop->op_type == OP_PUSHRE) {
2842 if (((PMOP*)curop)->op_pmreplroot) {
2843 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2844 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2845 break;
3280af22 2846 SvCUR(gv) = PL_generation;
1167e5da
SM		 2847 }
2848 }
79072805
LW		 2849 else
2850 break;
2851 }
2852 lastop = curop;
2853 }
11343788
MB		 2854 if (curop != o)
2855 o->op_private = OPpASSIGN_COMMON;
79072805 2856 }
c07a80fd 2857 if (right && right->op_type == OP_SPLIT) {
2858 OP* tmpop;
2859 if ((tmpop = ((LISTOP*)right)->op_first) &&
2860 tmpop->op_type == OP_PUSHRE)
2861 {
2862 PMOP *pm = (PMOP*)tmpop;
2863 if (left->op_type == OP_RV2AV &&
2864 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2865 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2866 {
2867 tmpop = ((UNOP*)left)->op_first;
2868 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2869 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2870 pm->op_pmflags |= PMf_ONCE;
11343788 2871 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2872 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2873 tmpop->op_sibling = Nullop; /* don't free split */
2874 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2875 op_free(o); /* blow off assign */
54310121 2876 right->op_flags &= ~OPf_WANT;
a5f75d66 2877 /* "I don't know and I don't care." */
c07a80fd 2878 return right;
2879 }
2880 }
2881 else {
3280af22 2882 if (PL_modcount < 10000 &&
c07a80fd 2883 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2884 {
2885 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2886 if (SvIVX(sv) == 0)
3280af22 2887 sv_setiv(sv, PL_modcount+1);
c07a80fd 2888 }
2889 }
2890 }
2891 }
11343788 2892 return o;
79072805
LW		 2893 }
2894 if (!right)
2895 right = newOP(OP_UNDEF, 0);
2896 if (right->op_type == OP_READLINE) {
2897 right->op_flags |= OPf_STACKED;
463ee0b2 2898 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2899 }
a0d0e21e 2900 else {
3280af22 2901 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2902 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2903 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 2904 if (PL_eval_start)
2905 PL_eval_start = 0;
748a9306 2906 else {
11343788 2907 op_free(o);
a0d0e21e
LW		 2908 return Nullop;
2909 }
2910 }
11343788 2911 return o;
79072805
LW		 2912}
2913
2914OP *
8ac85365 2915newSTATEOP(I32 flags, char *label, OP *o)
79072805 2916{
11343788 2917 dTHR;
bbce6d69 2918 U32 seq = intro_my();
79072805
LW		 2919 register COP *cop;
2920
2921 Newz(1101, cop, 1, COP);
3280af22 2922 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 2923 cop->op_type = OP_DBSTATE;
22c35a8c 2924 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 2925 }
2926 else {
2927 cop->op_type = OP_NEXTSTATE;
22c35a8c 2928 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 2929 }
79072805 2930 cop->op_flags = flags;
a0ed51b3 2931 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 2932#ifdef NATIVE_HINTS
2933 cop->op_private |= NATIVE_HINTS;
2934#endif
e24b16f9 2935 PL_compiling.op_private = cop->op_private;
79072805
LW		 2936 cop->op_next = (OP*)cop;
2937
463ee0b2
LW		 2938 if (label) {
2939 cop->cop_label = label;
3280af22 2940 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 2941 }
bbce6d69 2942 cop->cop_seq = seq;
3280af22 2943 cop->cop_arybase = PL_curcop->cop_arybase;
599cee73
PM		 2944 if (PL_curcop->cop_warnings == WARN_NONE
2945 || PL_curcop->cop_warnings == WARN_ALL)
2946 cop->cop_warnings = PL_curcop->cop_warnings ;
2947 else
2948 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
2949
79072805 2950
3280af22
NIS		 2951 if (PL_copline == NOLINE)
2952 cop->cop_line = PL_curcop->cop_line;
79072805 2953 else {
3280af22
NIS		 2954 cop->cop_line = PL_copline;
2955 PL_copline = NOLINE;
79072805 2956 }
3280af22
NIS		 2957 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
2958 cop->cop_stash = PL_curstash;
79072805 2959
3280af22
NIS		 2960 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2961 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2962 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 2963 (void)SvIOK_on(*svp);
a5f75d66 2964 SvIVX(*svp) = 1;
93a17b20
LW		 2965 SvSTASH(*svp) = (HV*)cop;
2966 }
2967 }
2968
11343788 2969 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2970}
2971
bbce6d69 2972/* "Introduce" my variables to visible status. */
2973U32
8ac85365 2974intro_my(void)
bbce6d69 2975{
2976 SV **svp;
2977 SV *sv;
2978 I32 i;
2979
3280af22
NIS		 2980 if (! PL_min_intro_pending)
2981 return PL_cop_seqmax;
bbce6d69 2982
3280af22
NIS		 2983 svp = AvARRAY(PL_comppad_name);
2984 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
2985 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 2986 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
3280af22 2987 SvNVX(sv) = (double)PL_cop_seqmax;
bbce6d69 2988 }
2989 }
3280af22
NIS		 2990 PL_min_intro_pending = 0;
2991 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
2992 return PL_cop_seqmax++;
bbce6d69 2993}
2994
79072805 2995OP *
8ac85365 2996newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2997{
883ffac3
CS		 2998 return new_logop(type, flags, &first, &other);
2999}
3000
3bd495df 3001STATIC OP *
883ffac3
CS		 3002new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
3003{
11343788 3004 dTHR;
79072805 3005 LOGOP *logop;
11343788 3006 OP *o;
883ffac3
CS		 3007 OP *first = *firstp;
3008 OP *other = *otherp;
79072805 3009
a0d0e21e
LW		 3010 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3011 return newBINOP(type, flags, scalar(first), scalar(other));
3012
8990e307 3013 scalarboolean(first);
79072805
LW		 3014 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3015 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3016 if (type == OP_AND || type == OP_OR) {
3017 if (type == OP_AND)
3018 type = OP_OR;
3019 else
3020 type = OP_AND;
11343788 3021 o = first;
883ffac3 3022 first = *firstp = cUNOPo->op_first;
11343788
MB		 3023 if (o->op_next)
3024 first->op_next = o->op_next;
3025 cUNOPo->op_first = Nullop;
3026 op_free(o);
79072805
LW		 3027 }
3028 }
3029 if (first->op_type == OP_CONST) {
599cee73
PM		 3030 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
3031 warner(WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3032 PL_op_desc[type]);
79072805
LW		 3033 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3034 op_free(first);
883ffac3 3035 *firstp = Nullop;
79072805
LW		 3036 return other;
3037 }
3038 else {
3039 op_free(other);
883ffac3 3040 *otherp = Nullop;
79072805
LW		 3041 return first;
3042 }
3043 }
3044 else if (first->op_type == OP_WANTARRAY) {
3045 if (type == OP_AND)
3046 list(other);
3047 else
3048 scalar(other);
3049 }
599cee73 3050 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3051 OP *k1 = ((UNOP*)first)->op_first;
3052 OP *k2 = k1->op_sibling;
3053 OPCODE warnop = 0;
3054 switch (first->op_type)
3055 {
3056 case OP_NULL:
3057 if (k2 && k2->op_type == OP_READLINE
3058 && (k2->op_flags & OPf_STACKED)
55d729e4 3059 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3060 warnop = k2->op_type;
3061 break;
3062
3063 case OP_SASSIGN:
68dc0745 3064 if (k1->op_type == OP_READDIR
3065 || k1->op_type == OP_GLOB
3066 || k1->op_type == OP_EACH)
a6006777 3067 warnop = k1->op_type;
3068 break;
3069 }
8ebc5c01 3070 if (warnop) {
3280af22
NIS		 3071 line_t oldline = PL_curcop->cop_line;
3072 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3073 warner(WARN_UNSAFE,
3074 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3075 PL_op_desc[warnop],
68dc0745 3076 ((warnop == OP_READLINE || warnop == OP_GLOB)
3077 ? " construct" : "() operator"));
3280af22 3078 PL_curcop->cop_line = oldline;
8ebc5c01 3079 }
a6006777 3080 }
79072805
LW		 3081
3082 if (!other)
3083 return first;
3084
a0d0e21e
LW		 3085 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3086 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3087
79072805
LW		 3088 Newz(1101, logop, 1, LOGOP);
3089
3090 logop->op_type = type;
22c35a8c 3091 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3092 logop->op_first = first;
3093 logop->op_flags = flags | OPf_KIDS;
3094 logop->op_other = LINKLIST(other);
c07a80fd 3095 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3096
3097 /* establish postfix order */
3098 logop->op_next = LINKLIST(first);
3099 first->op_next = (OP*)logop;
3100 first->op_sibling = other;
3101
11343788
MB		 3102 o = newUNOP(OP_NULL, 0, (OP*)logop);
3103 other->op_next = o;
79072805 3104
11343788 3105 return o;
79072805
LW		 3106}
3107
3108OP *
8ac85365 3109newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3110{
11343788 3111 dTHR;
79072805 3112 CONDOP *condop;
11343788 3113 OP *o;
79072805 3114
b1cb66bf 3115 if (!falseop)
3116 return newLOGOP(OP_AND, 0, first, trueop);
3117 if (!trueop)
3118 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3119
8990e307 3120 scalarboolean(first);
79072805
LW		 3121 if (first->op_type == OP_CONST) {
3122 if (SvTRUE(((SVOP*)first)->op_sv)) {
3123 op_free(first);
b1cb66bf 3124 op_free(falseop);
3125 return trueop;
79072805
LW		 3126 }
3127 else {
3128 op_free(first);
b1cb66bf 3129 op_free(trueop);
3130 return falseop;
79072805
LW		 3131 }
3132 }
3133 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3134 list(trueop);
3135 scalar(falseop);
79072805
LW		 3136 }
3137 Newz(1101, condop, 1, CONDOP);
3138
3139 condop->op_type = OP_COND_EXPR;
22c35a8c 3140 condop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
79072805
LW		 3141 condop->op_first = first;
3142 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 3143 condop->op_true = LINKLIST(trueop);
3144 condop->op_false = LINKLIST(falseop);
c07a80fd 3145 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3146
3147 /* establish postfix order */
3148 condop->op_next = LINKLIST(first);
3149 first->op_next = (OP*)condop;
3150
b1cb66bf 3151 first->op_sibling = trueop;
3152 trueop->op_sibling = falseop;
11343788 3153 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 3154
5dc0d613
MB		 3155 trueop->op_next = o;
3156 falseop->op_next = o;
79072805 3157
11343788 3158 return o;
79072805
LW		 3159}
3160
3161OP *
8ac85365 3162newRANGE(I32 flags, OP *left, OP *right)
79072805 3163{
b35b2403 3164 dTHR;
79072805
LW		 3165 CONDOP *condop;
3166 OP *flip;
3167 OP *flop;
11343788 3168 OP *o;
79072805
LW		 3169
3170 Newz(1101, condop, 1, CONDOP);
3171
3172 condop->op_type = OP_RANGE;
22c35a8c 3173 condop->op_ppaddr = PL_ppaddr[OP_RANGE];
79072805
LW		 3174 condop->op_first = left;
3175 condop->op_flags = OPf_KIDS;
3176 condop->op_true = LINKLIST(left);
3177 condop->op_false = LINKLIST(right);
c07a80fd 3178 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3179
3180 left->op_sibling = right;
3181
3182 condop->op_next = (OP*)condop;
3183 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
3184 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3185 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 3186 linklist(flop);
3187
3188 left->op_next = flip;
3189 right->op_next = flop;
3190
ed6116ce 3191 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 3192 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 3193 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3194 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3195
3196 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3197 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3198
11343788 3199 flip->op_next = o;
79072805 3200 if (!flip->op_private || !flop->op_private)
11343788 3201 linklist(o); /* blow off optimizer unless constant */
79072805 3202
11343788 3203 return o;
79072805
LW		 3204}
3205
3206OP *
8ac85365 3207newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3208{
11343788 3209 dTHR;
463ee0b2 3210 OP* listop;
11343788 3211 OP* o;
463ee0b2 3212 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3213 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3214
463ee0b2
LW		 3215 if (expr) {
3216 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3217 return block; /* do {} while 0 does once */
fb73857a 3218 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3219 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3220 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3221 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3222 } else if (expr->op_flags & OPf_KIDS) {
3223 OP *k1 = ((UNOP*)expr)->op_first;
3224 OP *k2 = (k1) ? k1->op_sibling : NULL;
3225 switch (expr->op_type) {
3226 case OP_NULL:
3227 if (k2 && k2->op_type == OP_READLINE
3228 && (k2->op_flags & OPf_STACKED)
3229 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3230 expr = newUNOP(OP_DEFINED, 0, expr);
3231 break;
3232
3233 case OP_SASSIGN:
3234 if (k1->op_type == OP_READDIR
3235 || k1->op_type == OP_GLOB
3236 || k1->op_type == OP_EACH)
3237 expr = newUNOP(OP_DEFINED, 0, expr);
3238 break;
3239 }
774d564b 3240 }
463ee0b2 3241 }
93a17b20 3242
8990e307 3243 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3244 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3245
883ffac3
CS		 3246 if (listop)
3247 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3248
11343788
MB		 3249 if (once && o != listop)
3250 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3251
11343788
MB		 3252 if (o == listop)
3253 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3254
11343788
MB		 3255 o->op_flags |= flags;
3256 o = scope(o);
3257 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3258 return o;
79072805
LW		 3259}
3260
3261OP *
8ac85365 3262newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3263{
11343788 3264 dTHR;
79072805
LW		 3265 OP *redo;
3266 OP *next = 0;
3267 OP *listop;
11343788 3268 OP *o;
79072805
LW		 3269 OP *condop;
3270
fb73857a 3271 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3272 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3273 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3274 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3275 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3276 OP *k1 = ((UNOP*)expr)->op_first;
3277 OP *k2 = (k1) ? k1->op_sibling : NULL;
3278 switch (expr->op_type) {
3279 case OP_NULL:
3280 if (k2 && k2->op_type == OP_READLINE
3281 && (k2->op_flags & OPf_STACKED)
3282 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3283 expr = newUNOP(OP_DEFINED, 0, expr);
3284 break;
3285
3286 case OP_SASSIGN:
3287 if (k1->op_type == OP_READDIR
3288 || k1->op_type == OP_GLOB
3289 || k1->op_type == OP_EACH)
3290 expr = newUNOP(OP_DEFINED, 0, expr);
3291 break;
3292 }
748a9306 3293 }
79072805
LW		 3294
3295 if (!block)
3296 block = newOP(OP_NULL, 0);
3297
3298 if (cont)
3299 next = LINKLIST(cont);
fb73857a 3300 if (expr) {
79072805 3301 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3302 if ((line_t)whileline != NOLINE) {
3280af22 3303 PL_copline = whileline;
fb73857a 3304 cont = append_elem(OP_LINESEQ, cont,
3305 newSTATEOP(0, Nullch, Nullop));
3306 }
3307 }
79072805 3308
463ee0b2 3309 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3310 redo = LINKLIST(listop);
3311
3312 if (expr) {
3280af22 3313 PL_copline = whileline;
883ffac3
CS		 3314 scalar(listop);
3315 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3316 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3317 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3318 op_free((OP*)loop);
883ffac3 3319 return Nullop; /* listop already freed by new_logop */
463ee0b2 3320 }
883ffac3
CS		 3321 if (listop)
3322 ((LISTOP*)listop)->op_last->op_next = condop =
3323 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3324 if (!next)
3325 next = condop;
3326 }
3327 else
11343788 3328 o = listop;
79072805
LW		 3329
3330 if (!loop) {
3331 Newz(1101,loop,1,LOOP);
3332 loop->op_type = OP_ENTERLOOP;
22c35a8c 3333 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3334 loop->op_private = 0;
3335 loop->op_next = (OP*)loop;
3336 }
3337
11343788 3338 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3339
3340 loop->op_redoop = redo;
11343788 3341 loop->op_lastop = o;
79072805
LW		 3342
3343 if (next)
3344 loop->op_nextop = next;
3345 else
11343788 3346 loop->op_nextop = o;
79072805 3347
11343788
MB		 3348 o->op_flags |= flags;
3349 o->op_private |= (flags >> 8);
3350 return o;
79072805
LW		 3351}
3352
3353OP *
8990e307 3354newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3355{
3356 LOOP *loop;
fb73857a 3357 OP *wop;
85e6fe83 3358 int padoff = 0;
4633a7c4 3359 I32 iterflags = 0;
79072805 3360
79072805 3361 if (sv) {
85e6fe83 3362 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3363 sv->op_type = OP_RV2GV;
22c35a8c 3364 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3365 }
85e6fe83
LW		 3366 else if (sv->op_type == OP_PADSV) { /* private variable */
3367 padoff = sv->op_targ;
3368 op_free(sv);
3369 sv = Nullop;
3370 }
54b9620d
MB		 3371 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3372 padoff = sv->op_targ;
3373 iterflags |= OPf_SPECIAL;
3374 op_free(sv);
3375 sv = Nullop;
3376 }
79072805 3377 else
22c35a8c 3378 croak("Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3379 }
3380 else {
54b9620d
MB		 3381#ifdef USE_THREADS
3382 padoff = find_threadsv("_");
3383 iterflags |= OPf_SPECIAL;
3384#else
3280af22 3385 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3386#endif
79072805 3387 }
5f05dabc 3388 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3389 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3390 iterflags |= OPf_STACKED;
3391 }
89ea2908
GA		 3392 else if (expr->op_type == OP_NULL &&
3393 (expr->op_flags & OPf_KIDS) &&
3394 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3395 {
3396 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3397 * set the STACKED flag to indicate that these values are to be
3398 * treated as min/max values by 'pp_iterinit'.
3399 */
3400 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3401 CONDOP* range = (CONDOP*) flip->op_first;
3402 OP* left = range->op_first;
3403 OP* right = left->op_sibling;
5152d7c7 3404 LISTOP* listop;
89ea2908
GA		 3405
3406 range->op_flags &= ~OPf_KIDS;
3407 range->op_first = Nullop;
3408
5152d7c7
GS		 3409 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3410 listop->op_first->op_next = range->op_true;
89ea2908 3411 left->op_next = range->op_false;
5152d7c7
GS		 3412 right->op_next = (OP*)listop;
3413 listop->op_next = listop->op_first;
89ea2908
GA		 3414
3415 op_free(expr);
5152d7c7 3416 expr = (OP*)(listop);
89ea2908
GA		 3417 null(expr);
3418 iterflags |= OPf_STACKED;
3419 }
3420 else {
3421 expr = mod(force_list(expr), OP_GREPSTART);
3422 }
3423
3424
4633a7c4 3425 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3426 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3427 assert(!loop->op_next);
3428 Renew(loop, 1, LOOP);
3429 loop->op_targ = padoff;
fb73857a 3430 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3431 PL_copline = forline;
fb73857a 3432 return newSTATEOP(0, label, wop);
79072805
LW		 3433}
3434
8990e307 3435OP*
8ac85365 3436newLOOPEX(I32 type, OP *label)
8990e307 3437{
11343788
MB		 3438 dTHR;
3439 OP *o;
2d8e6c8d
GS		 3440 STRLEN n_a;
3441
8990e307 3442 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3443 /* "last()" means "last" */
3444 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3445 o = newOP(type, OPf_SPECIAL);
3446 else {
3447 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3448 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3449 : ""));
3450 }
8990e307
LW		 3451 op_free(label);
3452 }
3453 else {
a0d0e21e
LW		 3454 if (label->op_type == OP_ENTERSUB)
3455 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3456 o = newUNOP(type, OPf_STACKED, label);
8990e307 3457 }
3280af22 3458 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3459 return o;
8990e307
LW		 3460}
3461
79072805 3462void
8ac85365 3463cv_undef(CV *cv)
79072805 3464{
11343788
MB		 3465 dTHR;
3466#ifdef USE_THREADS
e858de61
MB		 3467 if (CvMUTEXP(cv)) {
3468 MUTEX_DESTROY(CvMUTEXP(cv));
3469 Safefree(CvMUTEXP(cv));
3470 CvMUTEXP(cv) = 0;
3471 }
11343788
MB		 3472#endif /* USE_THREADS */
3473
a0d0e21e 3474 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3475#ifdef USE_THREADS
3476 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3477 croak("Can't undef active subroutine");
3478#else
a0d0e21e
LW		 3479 if (CvDEPTH(cv))
3480 croak("Can't undef active subroutine");
11343788 3481#endif /* USE_THREADS */
8990e307 3482 ENTER;
a0d0e21e 3483
3280af22
NIS		 3484 SAVESPTR(PL_curpad);
3485 PL_curpad = 0;
a0d0e21e 3486
a5f75d66 3487 if (!CvCLONED(cv))
748a9306 3488 op_free(CvROOT(cv));
79072805 3489 CvROOT(cv) = Nullop;
8990e307 3490 LEAVE;
79072805 3491 }
1d5db326 3492 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3493 CvFLAGS(cv) = 0;
8e07c86e
AD		 3494 SvREFCNT_dec(CvGV(cv));
3495 CvGV(cv) = Nullgv;
3496 SvREFCNT_dec(CvOUTSIDE(cv));
3497 CvOUTSIDE(cv) = Nullcv;
3498 if (CvPADLIST(cv)) {
8ebc5c01 3499 /* may be during global destruction */
3500 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3501 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3502 while (i >= 0) {
3503 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3504 SV* sv = svp ? *svp : Nullsv;
3505 if (!sv)
3506 continue;
3280af22
NIS		 3507 if (sv == (SV*)PL_comppad_name)
3508 PL_comppad_name = Nullav;
3509 else if (sv == (SV*)PL_comppad) {
3510 PL_comppad = Nullav;
3511 PL_curpad = Null(SV**);
46fc3d4c 3512 }
3513 SvREFCNT_dec(sv);
8ebc5c01 3514 }
3515 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3516 }
8e07c86e
AD		 3517 CvPADLIST(cv) = Nullav;
3518 }
79072805
LW		 3519}
3520
5f05dabc 3521#ifdef DEBUG_CLOSURES
76e3520e 3522STATIC void
5f05dabc 3523cv_dump(cv)
3524CV* cv;
3525{
3526 CV *outside = CvOUTSIDE(cv);
3527 AV* padlist = CvPADLIST(cv);
4fdae800 3528 AV* pad_name;
3529 AV* pad;
3530 SV** pname;
3531 SV** ppad;
5f05dabc 3532 I32 ix;
3533
fb73857a 3534 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3535 cv,
3536 (CvANON(cv) ? "ANON"
6b88bc9c 3537 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3538 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3539 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3540 outside,
3541 (!outside ? "null"
3542 : CvANON(outside) ? "ANON"
6b88bc9c 3543 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3544 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3545 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3546
4fdae800 3547 if (!padlist)
3548 return;
3549
3550 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3551 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3552 pname = AvARRAY(pad_name);
3553 ppad = AvARRAY(pad);
3554
93965878 3555 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3556 if (SvPOK(pname[ix]))
fb73857a 3557 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3558 ix, ppad[ix],
3559 SvFAKE(pname[ix]) ? "FAKE " : "",
3560 SvPVX(pname[ix]),
ab50184a
CS		 3561 (long)I_32(SvNVX(pname[ix])),
3562 (long)SvIVX(pname[ix]));
5f05dabc 3563 }
3564}
3565#endif /* DEBUG_CLOSURES */
3566
76e3520e 3567STATIC CV *
8ac85365 3568cv_clone2(CV *proto, CV *outside)
748a9306 3569{
11343788 3570 dTHR;
748a9306
LW		 3571 AV* av;
3572 I32 ix;
3573 AV* protopadlist = CvPADLIST(proto);
3574 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3575 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3576 SV** pname = AvARRAY(protopad_name);
3577 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3578 I32 fname = AvFILLp(protopad_name);
3579 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3580 AV* comppadlist;
3581 CV* cv;
3582
07055b4c
CS		 3583 assert(!CvUNIQUE(proto));
3584
748a9306 3585 ENTER;
3280af22
NIS		 3586 SAVESPTR(PL_curpad);
3587 SAVESPTR(PL_comppad);
3588 SAVESPTR(PL_comppad_name);
3589 SAVESPTR(PL_compcv);
748a9306 3590
3280af22 3591 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3592 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3593 CvCLONED_on(cv);
5f05dabc 3594 if (CvANON(proto))
3595 CvANON_on(cv);
748a9306 3596
11343788 3597#ifdef USE_THREADS
12ca11f6 3598 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3599 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3600 CvOWNER(cv) = 0;
3601#endif /* USE_THREADS */
748a9306 3602 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3603 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3604 CvSTASH(cv) = CvSTASH(proto);
3605 CvROOT(cv) = CvROOT(proto);
3606 CvSTART(cv) = CvSTART(proto);
5f05dabc 3607 if (outside)
3608 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3609
68dc0745 3610 if (SvPOK(proto))
3611 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3612
3280af22 3613 PL_comppad_name = newAV();
46fc3d4c 3614 for (ix = fname; ix >= 0; ix--)
3280af22 3615 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3616
3280af22 3617 PL_comppad = newAV();
748a9306
LW		 3618
3619 comppadlist = newAV();
3620 AvREAL_off(comppadlist);
3280af22
NIS		 3621 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3622 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3623 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3624 av_fill(PL_comppad, AvFILLp(protopad));
3625 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3626
3627 av = newAV(); /* will be @_ */
3628 av_extend(av, 0);
3280af22 3629 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3630 AvFLAGS(av) = AVf_REIFY;
3631
9607fc9c 3632 for (ix = fpad; ix > 0; ix--) {
3633 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3634 if (namesv && namesv != &PL_sv_undef) {
aa689395 3635 char *name = SvPVX(namesv); /* XXX */
3636 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3637 I32 off = pad_findlex(name, ix, SvIVX(namesv),
155fc61f 3638 CvOUTSIDE(cv), cxstack_ix, 0);
5f05dabc 3639 if (!off)
3280af22 3640 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3641 else if (off != ix)
748a9306
LW		 3642 croak("panic: cv_clone: %s", name);
3643 }
3644 else { /* our own lexical */
aa689395 3645 SV* sv;
5f05dabc 3646 if (*name == '&') {
3647 /* anon code -- we'll come back for it */
3648 sv = SvREFCNT_inc(ppad[ix]);
3649 }
3650 else if (*name == '@')
3651 sv = (SV*)newAV();
748a9306 3652 else if (*name == '%')
5f05dabc 3653 sv = (SV*)newHV();
748a9306 3654 else
5f05dabc 3655 sv = NEWSV(0,0);
3656 if (!SvPADBUSY(sv))
3657 SvPADMY_on(sv);
3280af22 3658 PL_curpad[ix] = sv;
748a9306
LW		 3659 }
3660 }
3661 else {
aa689395 3662 SV* sv = NEWSV(0,0);
748a9306 3663 SvPADTMP_on(sv);
3280af22 3664 PL_curpad[ix] = sv;
748a9306
LW		 3665 }
3666 }
3667
5f05dabc 3668 /* Now that vars are all in place, clone nested closures. */
3669
9607fc9c 3670 for (ix = fpad; ix > 0; ix--) {
3671 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3672 if (namesv
3280af22 3673 && namesv != &PL_sv_undef
aa689395 3674 && !(SvFLAGS(namesv) & SVf_FAKE)
3675 && *SvPVX(namesv) == '&'
5f05dabc 3676 && CvCLONE(ppad[ix]))
3677 {
3678 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3679 SvREFCNT_dec(ppad[ix]);
3680 CvCLONE_on(kid);
3681 SvPADMY_on(kid);
3280af22 3682 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3683 }
3684 }
3685
5f05dabc 3686#ifdef DEBUG_CLOSURES
ab50184a
CS		 3687 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3688 cv_dump(outside);
3689 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3690 cv_dump(proto);
ab50184a 3691 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3692 cv_dump(cv);
3693#endif
3694
748a9306
LW		 3695 LEAVE;
3696 return cv;
3697}
3698
3699CV *
8ac85365 3700cv_clone(CV *proto)
5f05dabc 3701{
b099ddc0
GS		 3702 CV *cv;
3703 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
3704 cv = cv_clone2(proto, CvOUTSIDE(proto));
3705 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
3706 return cv;
5f05dabc 3707}
3708
3fe9a6f1 3709void
8ac85365 3710cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3711{
3712 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3713 SV* msg = sv_newmortal();
3fe9a6f1 3714 SV* name = Nullsv;
3715
3716 if (gv)
46fc3d4c 3717 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3718 sv_setpv(msg, "Prototype mismatch:");
3719 if (name)
fc36a67e 3720 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3721 if (SvPOK(cv))
46fc3d4c 3722 sv_catpvf(msg, " (%s)", SvPVX(cv));
3723 sv_catpv(msg, " vs ");
3724 if (p)
3725 sv_catpvf(msg, "(%s)", p);
3726 else
3727 sv_catpv(msg, "none");
fc36a67e 3728 warn("%_", msg);
3fe9a6f1 3729 }
3730}
3731
760ac839 3732SV *
8ac85365 3733cv_const_sv(CV *cv)
760ac839 3734{
54310121 3735 if (!cv || !SvPOK(cv) || SvCUR(cv))
3736 return Nullsv;
fe5e78ed
GS		 3737 return op_const_sv(CvSTART(cv), cv);
3738}
760ac839 3739
fe5e78ed
GS		 3740SV *
3741op_const_sv(OP *o, CV *cv)
3742{
3743 SV *sv = Nullsv;
3744
3745 if(!o)
3746 return Nullsv;
3747
3748 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3749 o = cLISTOPo->op_first->op_sibling;
3750
3751 for (; o; o = o->op_next) {
54310121 3752 OPCODE type = o->op_type;
fe5e78ed
GS		 3753
3754 if(sv && o->op_next == o)
3755 return sv;
54310121 3756 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3757 continue;
3758 if (type == OP_LEAVESUB || type == OP_RETURN)
3759 break;
3760 if (sv)
3761 return Nullsv;
3762 if (type == OP_CONST)
5dc0d613 3763 sv = cSVOPo->op_sv;
fe5e78ed 3764 else if (type == OP_PADSV && cv) {
e858de61
MB		 3765 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3766 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3767 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3768 return Nullsv;
760ac839 3769 }
54310121 3770 else
3771 return Nullsv;
760ac839 3772 }
5aabfad6 3773 if (sv)
3774 SvREADONLY_on(sv);
760ac839
LW		 3775 return sv;
3776}
3777
748a9306 3778CV *
8ac85365 3779newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3780{
11343788 3781 dTHR;
2d8e6c8d
GS		 3782 STRLEN n_a;
3783 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4
GS		 3784 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3785 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
2d8e6c8d 3786 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 3787 register CV *cv=0;
a0d0e21e 3788 I32 ix;
79072805 3789
11343788 3790 if (o)
5dc0d613 3791 SAVEFREEOP(o);
3fe9a6f1 3792 if (proto)
3793 SAVEFREEOP(proto);
3794
55d729e4
GS		 3795 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3796 maximum a prototype before. */
3797 if (SvTYPE(gv) > SVt_NULL) {
3798 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1))
3799 warn("Runaway prototype");
3800 cv_ckproto((CV*)gv, NULL, ps);
3801 }
3802 if (ps)
3803 sv_setpv((SV*)gv, ps);
3804 else
3805 sv_setiv((SV*)gv, -1);
3280af22
NIS		 3806 SvREFCNT_dec(PL_compcv);
3807 cv = PL_compcv = NULL;
3808 PL_sub_generation++;
55d729e4
GS		 3809 goto noblock;
3810 }
3811
68dc0745 3812 if (!name || GvCVGEN(gv))
3813 cv = Nullcv;
3814 else if (cv = GvCV(gv)) {
3fe9a6f1 3815 cv_ckproto(cv, gv, ps);
68dc0745 3816 /* already defined (or promised)? */
3817 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3818 SV* const_sv;
fe5e78ed 3819 bool const_changed = TRUE;
aa689395 3820 if (!block) {
3821 /* just a "sub foo;" when &foo is already defined */
3280af22 3822 SAVEFREESV(PL_compcv);
aa689395 3823 goto done;
3824 }
7bac28a0 3825 /* ahem, death to those who redefine active sort subs */
3280af22 3826 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
7bac28a0 3827 croak("Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3828 if(const_sv = cv_const_sv(cv))
3829 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 3830 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
3831 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3832 && HvNAME(GvSTASH(CvGV(cv)))
3833 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3834 "autouse"))) {
3280af22
NIS		 3835 line_t oldline = PL_curcop->cop_line;
3836 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3837 warner(WARN_REDEFINE,
3838 const_sv ? "Constant subroutine %s redefined"
3839 : "Subroutine %s redefined", name);
3280af22 3840 PL_curcop->cop_line = oldline;
79072805 3841 }
8990e307 3842 SvREFCNT_dec(cv);
68dc0745 3843 cv = Nullcv;
79072805
LW		 3844 }
3845 }
a0d0e21e 3846 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3847 cv_undef(cv);
3280af22
NIS		 3848 CvFLAGS(cv) = CvFLAGS(PL_compcv);
3849 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
3850 CvOUTSIDE(PL_compcv) = 0;
3851 CvPADLIST(cv) = CvPADLIST(PL_compcv);
3852 CvPADLIST(PL_compcv) = 0;
3853 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
3854 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
3855 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 3856 }
3857 else {
3280af22 3858 cv = PL_compcv;
44a8e56a 3859 if (name) {
3860 GvCV(gv) = cv;
3861 GvCVGEN(gv) = 0;
3280af22 3862 PL_sub_generation++;
44a8e56a 3863 }
a0d0e21e 3864 }
44a8e56a 3865 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 3866 CvFILEGV(cv) = PL_curcop->cop_filegv;
3867 CvSTASH(cv) = PL_curstash;
11343788
MB		 3868#ifdef USE_THREADS
3869 CvOWNER(cv) = 0;
1cfa4ec7 3870 if (!CvMUTEXP(cv)) {
f6aaf501 3871 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 3872 MUTEX_INIT(CvMUTEXP(cv));
3873 }
11343788 3874#endif /* USE_THREADS */
8990e307 3875
3fe9a6f1 3876 if (ps)
3877 sv_setpv((SV*)cv, ps);
4633a7c4 3878
3280af22 3879 if (PL_error_count) {
c07a80fd 3880 op_free(block);
3881 block = Nullop;
68dc0745 3882 if (name) {
3883 char *s = strrchr(name, ':');
3884 s = s ? s+1 : name;
6d4c2119
CS		 3885 if (strEQ(s, "BEGIN")) {
3886 char *not_safe =
3887 "BEGIN not safe after errors--compilation aborted";
3280af22 3888 if (PL_in_eval & 4)
6d4c2119
CS		 3889 croak(not_safe);
3890 else {
3891 /* force display of errors found but not reported */
38a03e6e 3892 sv_catpv(ERRSV, not_safe);
2d8e6c8d 3893 croak("%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 3894 }
3895 }
68dc0745 3896 }
c07a80fd 3897 }
a0d0e21e 3898 if (!block) {
55d729e4 3899 noblock:
3280af22 3900 PL_copline = NOLINE;
a0d0e21e
LW		 3901 LEAVE_SCOPE(floor);
3902 return cv;
3903 }
3904
3280af22
NIS		 3905 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
3906 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 3907
54310121 3908 if (CvCLONE(cv)) {
3280af22
NIS		 3909 SV **namep = AvARRAY(PL_comppad_name);
3910 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 3911 SV *namesv;
3912
3280af22 3913 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3914 continue;
3915 /*
3916 * The only things that a clonable function needs in its
3917 * pad are references to outer lexicals and anonymous subs.
3918 * The rest are created anew during cloning.
3919 */
3920 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 3921 namesv != &PL_sv_undef &&
54310121 3922 (SvFAKE(namesv) ||
3923 *SvPVX(namesv) == '&')))
3924 {
3280af22
NIS		 3925 SvREFCNT_dec(PL_curpad[ix]);
3926 PL_curpad[ix] = Nullsv;
54310121 3927 }
3928 }
a0d0e21e 3929 }
54310121 3930 else {
3931 AV *av = newAV(); /* Will be @_ */
3932 av_extend(av, 0);
3280af22 3933 av_store(PL_comppad, 0, (SV*)av);
54310121 3934 AvFLAGS(av) = AVf_REIFY;
79072805 3935
3280af22
NIS		 3936 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
3937 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3938 continue;
3280af22
NIS		 3939 if (!SvPADMY(PL_curpad[ix]))
3940 SvPADTMP_on(PL_curpad[ix]);
54310121 3941 }
3942 }
79072805 3943
a0d0e21e 3944 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3945 CvSTART(cv) = LINKLIST(CvROOT(cv));
3946 CvROOT(cv)->op_next = 0;
3947 peep(CvSTART(cv));
93a17b20 3948
44a8e56a 3949 if (name) {
3950 char *s;
3951
3280af22 3952 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 3953 SV *sv = NEWSV(0,0);
44a8e56a 3954 SV *tmpstr = sv_newmortal();
549bb64a 3955 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3956 CV *cv;
3957 HV *hv;
3958
51790459 3959 sv_setpvf(sv, "%_:%ld-%ld",
3280af22
NIS		 3960 GvSV(PL_curcop->cop_filegv),
3961 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 3962 gv_efullname3(tmpstr, gv, Nullch);
3280af22 3963 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3964 hv = GvHVn(db_postponed);
9607fc9c 3965 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3966 && (cv = GvCV(db_postponed))) {
44a8e56a 3967 dSP;
924508f0 3968 PUSHMARK(SP);
44a8e56a 3969 XPUSHs(tmpstr);
3970 PUTBACK;
3971 perl_call_sv((SV*)cv, G_DISCARD);
3972 }
3973 }
79072805 3974
44a8e56a 3975 if ((s = strrchr(name,':')))
28757baa 3976 s++;
3977 else
3978 s = name;
68dc0745 3979 if (strEQ(s, "BEGIN")) {
3280af22 3980 I32 oldscope = PL_scopestack_ix;
28757baa 3981 ENTER;
3280af22
NIS		 3982 SAVESPTR(PL_compiling.cop_filegv);
3983 SAVEI16(PL_compiling.cop_line);
3984 save_svref(&PL_rs);
3985 sv_setsv(PL_rs, PL_nrs);
28757baa 3986
3280af22
NIS		 3987 if (!PL_beginav)
3988 PL_beginav = newAV();
28757baa 3989 DEBUG_x( dump_sub(gv) );
3280af22 3990 av_push(PL_beginav, (SV *)cv);
28757baa 3991 GvCV(gv) = 0;
3280af22 3992 call_list(oldscope, PL_beginav);
a6006777 3993
3280af22 3994 PL_curcop = &PL_compiling;
a0ed51b3 3995 PL_compiling.op_private = PL_hints;
28757baa 3996 LEAVE;
3997 }
3280af22
NIS		 3998 else if (strEQ(s, "END") && !PL_error_count) {
3999 if (!PL_endav)
4000 PL_endav = newAV();
4001 av_unshift(PL_endav, 1);
4002 av_store(PL_endav, 0, (SV *)cv);
28757baa 4003 GvCV(gv) = 0;
4004 }
3280af22
NIS		 4005 else if (strEQ(s, "INIT") && !PL_error_count) {
4006 if (!PL_initav)
4007 PL_initav = newAV();
4008 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4009 GvCV(gv) = 0;
ae77835f 4010 }
79072805 4011 }
a6006777 4012
aa689395 4013 done:
3280af22 4014 PL_copline = NOLINE;
8990e307 4015 LEAVE_SCOPE(floor);
a0d0e21e 4016 return cv;
79072805
LW		 4017}
4018
b099ddc0 4019/* XXX unsafe for threads if eval_owner isn't held */
5476c433
JD		 4020void
4021newCONSTSUB(HV *stash, char *name, SV *sv)
4022{
4023 dTHR;
3280af22
NIS		 4024 U32 oldhints = PL_hints;
4025 HV *old_cop_stash = PL_curcop->cop_stash;
4026 HV *old_curstash = PL_curstash;
4027 line_t oldline = PL_curcop->cop_line;
4028 PL_curcop->cop_line = PL_copline;
5476c433 4029
3280af22 4030 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4031 if(stash)
3280af22 4032 PL_curstash = PL_curcop->cop_stash = stash;
5476c433
JD		 4033
4034 newSUB(
be24f278 4035 start_subparse(FALSE, 0),
5476c433 4036 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4037 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
5476c433
JD		 4038 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4039 );
4040
3280af22
NIS		 4041 PL_hints = oldhints;
4042 PL_curcop->cop_stash = old_cop_stash;
4043 PL_curstash = old_curstash;
4044 PL_curcop->cop_line = oldline;
5476c433
JD		 4045}
4046
57d3b86d 4047CV *
e3b8966e 4048newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename)
a0d0e21e 4049{
11343788 4050 dTHR;
44a8e56a 4051 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4052 register CV *cv;
44a8e56a 4053
4054 if (cv = (name ? GvCV(gv) : Nullcv)) {
4055 if (GvCVGEN(gv)) {
4056 /* just a cached method */
4057 SvREFCNT_dec(cv);
4058 cv = 0;
4059 }
4060 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4061 /* already defined (or promised) */
599cee73 4062 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4063 && HvNAME(GvSTASH(CvGV(cv)))
4064 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4065 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4066 if (PL_copline != NOLINE)
4067 PL_curcop->cop_line = PL_copline;
599cee73 4068 warner(WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4069 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4070 }
4071 SvREFCNT_dec(cv);
4072 cv = 0;
79072805 4073 }
79072805 4074 }
44a8e56a 4075
4076 if (cv) /* must reuse cv if autoloaded */
4077 cv_undef(cv);
a0d0e21e
LW		 4078 else {
4079 cv = (CV*)NEWSV(1105,0);
4080 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4081 if (name) {
4082 GvCV(gv) = cv;
4083 GvCVGEN(gv) = 0;
3280af22 4084 PL_sub_generation++;
44a8e56a 4085 }
a0d0e21e 4086 }
5196be3e 4087 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4088#ifdef USE_THREADS
12ca11f6 4089 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4090 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4091 CvOWNER(cv) = 0;
4092#endif /* USE_THREADS */
79072805 4093 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4094 CvXSUB(cv) = subaddr;
44a8e56a 4095
28757baa 4096 if (name) {
4097 char *s = strrchr(name,':');
4098 if (s)
4099 s++;
4100 else
4101 s = name;
4102 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4103 if (!PL_beginav)
4104 PL_beginav = newAV();
4105 av_push(PL_beginav, (SV *)cv);
44a8e56a 4106 GvCV(gv) = 0;
28757baa 4107 }
4108 else if (strEQ(s, "END")) {
3280af22
NIS		 4109 if (!PL_endav)
4110 PL_endav = newAV();
4111 av_unshift(PL_endav, 1);
4112 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4113 GvCV(gv) = 0;
28757baa 4114 }
7d07dbc2 4115 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4116 if (!PL_initav)
4117 PL_initav = newAV();
4118 av_push(PL_initav, (SV *)cv);
f8f842e4 4119 GvCV(gv) = 0;
ae77835f 4120 }
28757baa 4121 }
8990e307 4122 else
a5f75d66 4123 CvANON_on(cv);
44a8e56a 4124
a0d0e21e 4125 return cv;
79072805
LW		 4126}
4127
4128void
8ac85365 4129newFORM(I32 floor, OP *o, OP *block)
79072805 4130{
11343788 4131 dTHR;
79072805
LW		 4132 register CV *cv;
4133 char *name;
4134 GV *gv;
a0d0e21e 4135 I32 ix;
2d8e6c8d 4136 STRLEN n_a;
79072805 4137
11343788 4138 if (o)
2d8e6c8d 4139 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4140 else
4141 name = "STDOUT";
85e6fe83 4142 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4143 GvMULTI_on(gv);
79072805 4144 if (cv = GvFORM(gv)) {
599cee73 4145 if (ckWARN(WARN_REDEFINE)) {
3280af22 4146 line_t oldline = PL_curcop->cop_line;
79072805 4147
3280af22 4148 PL_curcop->cop_line = PL_copline;
599cee73 4149 warner(WARN_REDEFINE, "Format %s redefined",name);
3280af22 4150 PL_curcop->cop_line = oldline;
79072805 4151 }
8990e307 4152 SvREFCNT_dec(cv);
79072805 4153 }
3280af22 4154 cv = PL_compcv;
79072805 4155 GvFORM(gv) = cv;
44a8e56a 4156 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4157 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4158
3280af22
NIS		 4159 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4160 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4161 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4162 }
4163
79072805
LW		 4164 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4165 CvSTART(cv) = LINKLIST(CvROOT(cv));
4166 CvROOT(cv)->op_next = 0;
4167 peep(CvSTART(cv));
11343788 4168 op_free(o);
3280af22 4169 PL_copline = NOLINE;
8990e307 4170 LEAVE_SCOPE(floor);
79072805
LW		 4171}
4172
4173OP *
8ac85365 4174newANONLIST(OP *o)
79072805 4175{
93a17b20 4176 return newUNOP(OP_REFGEN, 0,
11343788 4177 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4178}
4179
4180OP *
8ac85365 4181newANONHASH(OP *o)
79072805 4182{
93a17b20 4183 return newUNOP(OP_REFGEN, 0,
11343788 4184 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4185}
4186
4187OP *
8ac85365 4188newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 4189{
4190 return newUNOP(OP_REFGEN, 0,
4633a7c4 4191 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 4192}
4193
4194OP *
8ac85365 4195oopsAV(OP *o)
79072805 4196{
ed6116ce
LW		 4197 switch (o->op_type) {
4198 case OP_PADSV:
4199 o->op_type = OP_PADAV;
22c35a8c 4200 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4201 return ref(o, OP_RV2AV);
ed6116ce
LW		 4202
4203 case OP_RV2SV:
79072805 4204 o->op_type = OP_RV2AV;
22c35a8c 4205 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4206 ref(o, OP_RV2AV);
ed6116ce
LW		 4207 break;
4208
4209 default:
79072805 4210 warn("oops: oopsAV");
ed6116ce
LW		 4211 break;
4212 }
79072805
LW		 4213 return o;
4214}
4215
4216OP *
8ac85365 4217oopsHV(OP *o)
79072805 4218{
ed6116ce
LW		 4219 switch (o->op_type) {
4220 case OP_PADSV:
4221 case OP_PADAV:
4222 o->op_type = OP_PADHV;
22c35a8c 4223 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4224 return ref(o, OP_RV2HV);
ed6116ce
LW		 4225
4226 case OP_RV2SV:
4227 case OP_RV2AV:
79072805 4228 o->op_type = OP_RV2HV;
22c35a8c 4229 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4230 ref(o, OP_RV2HV);
ed6116ce
LW		 4231 break;
4232
4233 default:
79072805 4234 warn("oops: oopsHV");
ed6116ce
LW		 4235 break;
4236 }
79072805
LW		 4237 return o;
4238}
4239
4240OP *
8ac85365 4241newAVREF(OP *o)
79072805 4242{
ed6116ce
LW		 4243 if (o->op_type == OP_PADANY) {
4244 o->op_type = OP_PADAV;
22c35a8c 4245 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4246 return o;
ed6116ce 4247 }
79072805
LW		 4248 return newUNOP(OP_RV2AV, 0, scalar(o));
4249}
4250
4251OP *
8ac85365 4252newGVREF(I32 type, OP *o)
79072805 4253{
a0d0e21e
LW		 4254 if (type == OP_MAPSTART)
4255 return newUNOP(OP_NULL, 0, o);
748a9306 4256 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4257}
4258
4259OP *
8ac85365 4260newHVREF(OP *o)
79072805 4261{
ed6116ce
LW		 4262 if (o->op_type == OP_PADANY) {
4263 o->op_type = OP_PADHV;
22c35a8c 4264 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4265 return o;
ed6116ce 4266 }
79072805
LW		 4267 return newUNOP(OP_RV2HV, 0, scalar(o));
4268}
4269
4270OP *
8ac85365 4271oopsCV(OP *o)
79072805 4272{
463ee0b2 4273 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 4274 /* STUB */
4275 return o;
4276}
4277
4278OP *
8ac85365 4279newCVREF(I32 flags, OP *o)
79072805 4280{
c07a80fd 4281 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4282}
4283
4284OP *
8ac85365 4285newSVREF(OP *o)
79072805 4286{
ed6116ce
LW		 4287 if (o->op_type == OP_PADANY) {
4288 o->op_type = OP_PADSV;
22c35a8c 4289 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4290 return o;
ed6116ce 4291 }
224a4551
MB		 4292 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4293 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4294 return o;
224a4551 4295 }
79072805
LW		 4296 return newUNOP(OP_RV2SV, 0, scalar(o));
4297}
4298
4299/* Check routines. */
4300
4301OP *
8ac85365 4302ck_anoncode(OP *o)
5f05dabc 4303{
178c6305
CS		 4304 PADOFFSET ix;
4305 SV* name;
4306
4307 name = NEWSV(1106,0);
4308 sv_upgrade(name, SVt_PVNV);
4309 sv_setpvn(name, "&", 1);
4310 SvIVX(name) = -1;
4311 SvNVX(name) = 1;
5dc0d613 4312 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4313 av_store(PL_comppad_name, ix, name);
4314 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4315 SvPADMY_on(cSVOPo->op_sv);
4316 cSVOPo->op_sv = Nullsv;
4317 cSVOPo->op_targ = ix;
4318 return o;
5f05dabc 4319}
4320
4321OP *
8ac85365 4322ck_bitop(OP *o)
55497cff 4323{
3280af22 4324 o->op_private = PL_hints;
5dc0d613 4325 return o;
55497cff 4326}
4327
4328OP *
8ac85365 4329ck_concat(OP *o)
79072805 4330{
11343788
MB		 4331 if (cUNOPo->op_first->op_type == OP_CONCAT)
4332 o->op_flags |= OPf_STACKED;
4333 return o;
79072805
LW		 4334}
4335
4336OP *
8ac85365 4337ck_spair(OP *o)
79072805 4338{
11343788 4339 if (o->op_flags & OPf_KIDS) {
79072805 4340 OP* newop;
a0d0e21e 4341 OP* kid;
5dc0d613
MB		 4342 OPCODE type = o->op_type;
4343 o = modkids(ck_fun(o), type);
11343788 4344 kid = cUNOPo->op_first;
a0d0e21e
LW		 4345 newop = kUNOP->op_first->op_sibling;
4346 if (newop &&
4347 (newop->op_sibling ||
22c35a8c 4348 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4349 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4350 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4351
11343788 4352 return o;
a0d0e21e
LW		 4353 }
4354 op_free(kUNOP->op_first);
4355 kUNOP->op_first = newop;
4356 }
22c35a8c 4357 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4358 return ck_fun(o);
a0d0e21e
LW		 4359}
4360
4361OP *
8ac85365 4362ck_delete(OP *o)
a0d0e21e 4363{
11343788 4364 o = ck_fun(o);
5dc0d613 4365 o->op_private = 0;
11343788
MB		 4366 if (o->op_flags & OPf_KIDS) {
4367 OP *kid = cUNOPo->op_first;
5f05dabc 4368 if (kid->op_type == OP_HSLICE)
5dc0d613 4369 o->op_private |= OPpSLICE;
5f05dabc 4370 else if (kid->op_type != OP_HELEM)
4371 croak("%s argument is not a HASH element or slice",
22c35a8c 4372 PL_op_desc[o->op_type]);
a0d0e21e 4373 null(kid);
79072805 4374 }
11343788 4375 return o;
79072805
LW		 4376}
4377
4378OP *
8ac85365 4379ck_eof(OP *o)
79072805 4380{
11343788 4381 I32 type = o->op_type;
79072805 4382
11343788
MB		 4383 if (o->op_flags & OPf_KIDS) {
4384 if (cLISTOPo->op_first->op_type == OP_STUB) {
4385 op_free(o);
4386 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4387 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4388 }
11343788 4389 return ck_fun(o);
79072805 4390 }
11343788 4391 return o;
79072805
LW		 4392}
4393
4394OP *
8ac85365 4395ck_eval(OP *o)
79072805 4396{
3280af22 4397 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4398 if (o->op_flags & OPf_KIDS) {
4399 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4400
93a17b20 4401 if (!kid) {
11343788
MB		 4402 o->op_flags &= ~OPf_KIDS;
4403 null(o);
79072805
LW		 4404 }
4405 else if (kid->op_type == OP_LINESEQ) {
4406 LOGOP *enter;
4407
11343788
MB		 4408 kid->op_next = o->op_next;
4409 cUNOPo->op_first = 0;
4410 op_free(o);
79072805
LW		 4411
4412 Newz(1101, enter, 1, LOGOP);
4413 enter->op_type = OP_ENTERTRY;
22c35a8c 4414 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4415 enter->op_private = 0;
4416
4417 /* establish postfix order */
4418 enter->op_next = (OP*)enter;
4419
11343788
MB		 4420 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4421 o->op_type = OP_LEAVETRY;
22c35a8c 4422 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4423 enter->op_other = o;
4424 return o;
79072805 4425 }
c7cc6f1c 4426 else
473986ff 4427 scalar((OP*)kid);
79072805
LW		 4428 }
4429 else {
11343788 4430 op_free(o);
54b9620d 4431 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4432 }
3280af22 4433 o->op_targ = (PADOFFSET)PL_hints;
11343788 4434 return o;
79072805
LW		 4435}
4436
4437OP *
8ac85365 4438ck_exec(OP *o)
79072805
LW		 4439{
4440 OP *kid;
11343788
MB		 4441 if (o->op_flags & OPf_STACKED) {
4442 o = ck_fun(o);
4443 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4444 if (kid->op_type == OP_RV2GV)
4445 null(kid);
79072805 4446 }
463ee0b2 4447 else
11343788
MB		 4448 o = listkids(o);
4449 return o;
79072805
LW		 4450}
4451
4452OP *
8ac85365 4453ck_exists(OP *o)
5f05dabc 4454{
5196be3e
MB		 4455 o = ck_fun(o);
4456 if (o->op_flags & OPf_KIDS) {
4457 OP *kid = cUNOPo->op_first;
5f05dabc 4458 if (kid->op_type != OP_HELEM)
22c35a8c 4459 croak("%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4460 null(kid);
4461 }
5196be3e 4462 return o;
5f05dabc 4463}
4464
22c35a8c 4465#if 0
5f05dabc 4466OP *
8ac85365 4467ck_gvconst(register OP *o)
79072805
LW		 4468{
4469 o = fold_constants(o);
4470 if (o->op_type == OP_CONST)
4471 o->op_type = OP_GV;
4472 return o;
4473}
22c35a8c 4474#endif
79072805
LW		 4475
4476OP *
8ac85365 4477ck_rvconst(register OP *o)
79072805 4478{
11343788
MB		 4479 dTHR;
4480 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4481
3280af22 4482 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4483 if (kid->op_type == OP_CONST) {
44a8e56a 4484 char *name;
4485 int iscv;
4486 GV *gv;
779c5bc9 4487 SV *kidsv = kid->op_sv;
2d8e6c8d 4488 STRLEN n_a;
44a8e56a 4489
779c5bc9
GS		 4490 /* Is it a constant from cv_const_sv()? */
4491 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4492 SV *rsv = SvRV(kidsv);
4493 int svtype = SvTYPE(rsv);
4494 char *badtype = Nullch;
4495
4496 switch (o->op_type) {
4497 case OP_RV2SV:
4498 if (svtype > SVt_PVMG)
4499 badtype = "a SCALAR";
4500 break;
4501 case OP_RV2AV:
4502 if (svtype != SVt_PVAV)
4503 badtype = "an ARRAY";
4504 break;
4505 case OP_RV2HV:
4506 if (svtype != SVt_PVHV) {
4507 if (svtype == SVt_PVAV) { /* pseudohash? */
4508 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4509 if (ksv && SvROK(*ksv)
4510 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4511 {
4512 break;
4513 }
4514 }
4515 badtype = "a HASH";
4516 }
4517 break;
4518 case OP_RV2CV:
4519 if (svtype != SVt_PVCV)
4520 badtype = "a CODE";
4521 break;
4522 }
4523 if (badtype)
4524 croak("Constant is not %s reference", badtype);
4525 return o;
4526 }
2d8e6c8d 4527 name = SvPV(kidsv, n_a);
3280af22 4528 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4529 char *badthing = Nullch;
5dc0d613 4530 switch (o->op_type) {
44a8e56a 4531 case OP_RV2SV:
4532 badthing = "a SCALAR";
4533 break;
4534 case OP_RV2AV:
4535 badthing = "an ARRAY";
4536 break;
4537 case OP_RV2HV:
4538 badthing = "a HASH";
4539 break;
4540 }
4541 if (badthing)
4542 croak(
4543 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4544 name, badthing);
4545 }
93233ece
CS		 4546 /*
4547 * This is a little tricky. We only want to add the symbol if we
4548 * didn't add it in the lexer. Otherwise we get duplicate strict
4549 * warnings. But if we didn't add it in the lexer, we must at
4550 * least pretend like we wanted to add it even if it existed before,
4551 * or we get possible typo warnings. OPpCONST_ENTERED says
4552 * whether the lexer already added THIS instance of this symbol.
4553 */
5196be3e 4554 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4555 do {
44a8e56a 4556 gv = gv_fetchpv(name,
748a9306 4557 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4558 iscv
4559 ? SVt_PVCV
11343788 4560 : o->op_type == OP_RV2SV
a0d0e21e 4561 ? SVt_PV
11343788 4562 : o->op_type == OP_RV2AV
a0d0e21e 4563 ? SVt_PVAV
11343788 4564 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4565 ? SVt_PVHV
4566 : SVt_PVGV);
93233ece
CS		 4567 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4568 if (gv) {
4569 kid->op_type = OP_GV;
4570 SvREFCNT_dec(kid->op_sv);
4571 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4572 }
79072805 4573 }
11343788 4574 return o;
79072805
LW		 4575}
4576
4577OP *
8ac85365 4578ck_ftst(OP *o)
79072805 4579{
11343788
MB		 4580 dTHR;
4581 I32 type = o->op_type;
79072805 4582
11343788
MB		 4583 if (o->op_flags & OPf_REF)
4584 return o;
79072805 4585
108ed793 4586 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4587 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4588
4589 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 4590 STRLEN n_a;
a0d0e21e 4591 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 4592 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 4593 op_free(o);
79072805
LW		 4594 return newop;
4595 }
4596 }
4597 else {
11343788 4598 op_free(o);
79072805 4599 if (type == OP_FTTTY)
fb73857a 4600 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4601 SVt_PVIO));
79072805 4602 else
54b9620d 4603 return newUNOP(type, 0, newDEFSVOP());
79072805 4604 }
11343788 4605 return o;
79072805
LW		 4606}
4607
4608OP *
8ac85365 4609ck_fun(OP *o)
79072805 4610{
11343788 4611 dTHR;
79072805
LW		 4612 register OP *kid;
4613 OP **tokid;
4614 OP *sibl;
4615 I32 numargs = 0;
11343788 4616 int type = o->op_type;
22c35a8c 4617 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 4618
11343788 4619 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4620 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4621 oa &= ~OA_OPTIONAL;
4622 else
11343788 4623 return no_fh_allowed(o);
79072805
LW		 4624 }
4625
11343788 4626 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 4627 STRLEN n_a;
11343788
MB		 4628 tokid = &cLISTOPo->op_first;
4629 kid = cLISTOPo->op_first;
8990e307
LW		 4630 if (kid->op_type == OP_PUSHMARK ||
4631 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4632 {
79072805
LW		 4633 tokid = &kid->op_sibling;
4634 kid = kid->op_sibling;
4635 }
22c35a8c 4636 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 4637 *tokid = kid = newDEFSVOP();
79072805
LW		 4638
4639 while (oa && kid) {
4640 numargs++;
4641 sibl = kid->op_sibling;
4642 switch (oa & 7) {
4643 case OA_SCALAR:
4644 scalar(kid);
4645 break;
4646 case OA_LIST:
4647 if (oa < 16) {
4648 kid = 0;
4649 continue;
4650 }
4651 else
4652 list(kid);
4653 break;
4654 case OA_AVREF:
4655 if (kid->op_type == OP_CONST &&
4656 (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 4657 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4658 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4659 gv_fetchpv(name, TRUE, SVt_PVAV) ));
599cee73
PM		 4660 if (ckWARN(WARN_SYNTAX))
4661 warner(WARN_SYNTAX,
4662 "Array @%s missing the @ in argument %ld of %s()",
22c35a8c 4663 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4664 op_free(kid);
4665 kid = newop;
4666 kid->op_sibling = sibl;
4667 *tokid = kid;
4668 }
8990e307 4669 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
22c35a8c 4670 bad_type(numargs, "array", PL_op_desc[o->op_type], kid);
a0d0e21e 4671 mod(kid, type);
79072805
LW		 4672 break;
4673 case OA_HVREF:
4674 if (kid->op_type == OP_CONST &&
4675 (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 4676 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4677 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4678 gv_fetchpv(name, TRUE, SVt_PVHV) ));
599cee73
PM		 4679 if (ckWARN(WARN_SYNTAX))
4680 warner(WARN_SYNTAX,
4681 "Hash %%%s missing the %% in argument %ld of %s()",
22c35a8c 4682 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4683 op_free(kid);
4684 kid = newop;
4685 kid->op_sibling = sibl;
4686 *tokid = kid;
4687 }
8990e307 4688 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
22c35a8c 4689 bad_type(numargs, "hash", PL_op_desc[o->op_type], kid);
a0d0e21e 4690 mod(kid, type);
79072805
LW		 4691 break;
4692 case OA_CVREF:
4693 {
a0d0e21e 4694 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4695 kid->op_sibling = 0;
4696 linklist(kid);
4697 newop->op_next = newop;
4698 kid = newop;
4699 kid->op_sibling = sibl;
4700 *tokid = kid;
4701 }
4702 break;
4703 case OA_FILEREF:
c340be78 4704 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805
LW		 4705 if (kid->op_type == OP_CONST &&
4706 (kid->op_private & OPpCONST_BARE)) {
4707 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 4708 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 4709 SVt_PVIO) );
79072805
LW		 4710 op_free(kid);
4711 kid = newop;
4712 }
1ea32a52
GS		 4713 else if (kid->op_type == OP_READLINE) {
4714 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
4715 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
4716 }
79072805
LW		 4717 else {
4718 kid->op_sibling = 0;
4719 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4720 }
4721 kid->op_sibling = sibl;
4722 *tokid = kid;
4723 }
4724 scalar(kid);
4725 break;
4726 case OA_SCALARREF:
a0d0e21e 4727 mod(scalar(kid), type);
79072805
LW		 4728 break;
4729 }
4730 oa >>= 4;
4731 tokid = &kid->op_sibling;
4732 kid = kid->op_sibling;
4733 }
11343788 4734 o->op_private |= numargs;
79072805 4735 if (kid)
22c35a8c 4736 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 4737 listkids(o);
79072805 4738 }
22c35a8c 4739 else if (PL_opargs[type] & OA_DEFGV) {
11343788 4740 op_free(o);
54b9620d 4741 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4742 }
4743
79072805
LW		 4744 if (oa) {
4745 while (oa & OA_OPTIONAL)
4746 oa >>= 4;
4747 if (oa && oa != OA_LIST)
22c35a8c 4748 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 4749 }
11343788 4750 return o;
79072805
LW		 4751}
4752
4753OP *
8ac85365 4754ck_glob(OP *o)
79072805 4755{
fb73857a 4756 GV *gv;
4757
1f2bfc8a 4758 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4759 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4760
4761 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4762 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4763
4764 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4765 static int glob_index;
4766
5196be3e 4767 append_elem(OP_GLOB, o,
46fc3d4c 4768 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a 4769 o->op_type = OP_LIST;
22c35a8c 4770 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 4771 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 4772 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 4773 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4774 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4775 scalar(newUNOP(OP_RV2CV, 0,
4776 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4777 o = newUNOP(OP_NULL, 0, ck_subr(o));
4778 o->op_targ = OP_GLOB; /* hint at what it used to be */
4779 return o;
b1cb66bf 4780 }
4781 gv = newGVgen("main");
a0d0e21e 4782 gv_IOadd(gv);
11343788
MB		 4783 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4784 scalarkids(o);
4785 return ck_fun(o);
79072805
LW		 4786}
4787
4788OP *
8ac85365 4789ck_grep(OP *o)
79072805
LW		 4790{
4791 LOGOP *gwop;
4792 OP *kid;
11343788 4793 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4794
22c35a8c 4795 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
a0d0e21e 4796 Newz(1101, gwop, 1, LOGOP);
aeea060c 4797
11343788 4798 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4799 OP* k;
11343788
MB		 4800 o = ck_sort(o);
4801 kid = cLISTOPo->op_first->op_sibling;
4802 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4803 kid = k;
4804 }
4805 kid->op_next = (OP*)gwop;
11343788 4806 o->op_flags &= ~OPf_STACKED;
93a17b20 4807 }
11343788 4808 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4809 if (type == OP_MAPWHILE)
4810 list(kid);
4811 else
4812 scalar(kid);
11343788 4813 o = ck_fun(o);
3280af22 4814 if (PL_error_count)
11343788 4815 return o;
aeea060c 4816 kid = cLISTOPo->op_first->op_sibling;
79072805 4817 if (kid->op_type != OP_NULL)
463ee0b2 4818 croak("panic: ck_grep");
79072805
LW		 4819 kid = kUNOP->op_first;
4820
a0d0e21e 4821 gwop->op_type = type;
22c35a8c 4822 gwop->op_ppaddr = PL_ppaddr[type];
11343788 4823 gwop->op_first = listkids(o);
79072805
LW		 4824 gwop->op_flags |= OPf_KIDS;
4825 gwop->op_private = 1;
4826 gwop->op_other = LINKLIST(kid);
a0d0e21e 4827 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4828 kid->op_next = (OP*)gwop;
4829
11343788 4830 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4831 if (!kid || !kid->op_sibling)
22c35a8c 4832 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 4833 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4834 mod(kid, OP_GREPSTART);
4835
79072805
LW		 4836 return (OP*)gwop;
4837}
4838
4839OP *
8ac85365 4840ck_index(OP *o)
79072805 4841{
11343788
MB		 4842 if (o->op_flags & OPf_KIDS) {
4843 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 4844 if (kid)
4845 kid = kid->op_sibling; /* get past "big" */
79072805 4846 if (kid && kid->op_type == OP_CONST)
2779dcf1 4847 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4848 }
11343788 4849 return ck_fun(o);
79072805
LW		 4850}
4851
4852OP *
8ac85365 4853ck_lengthconst(OP *o)
79072805
LW		 4854{
4855 /* XXX length optimization goes here */
11343788 4856 return ck_fun(o);
79072805
LW		 4857}
4858
4859OP *
8ac85365 4860ck_lfun(OP *o)
79072805 4861{
5dc0d613
MB		 4862 OPCODE type = o->op_type;
4863 return modkids(ck_fun(o), type);
79072805
LW		 4864}
4865
4866OP *
8ac85365 4867ck_rfun(OP *o)
8990e307 4868{
5dc0d613
MB		 4869 OPCODE type = o->op_type;
4870 return refkids(ck_fun(o), type);
8990e307
LW		 4871}
4872
4873OP *
8ac85365 4874ck_listiob(OP *o)
79072805
LW		 4875{
4876 register OP *kid;
aeea060c 4877
11343788 4878 kid = cLISTOPo->op_first;
79072805 4879 if (!kid) {
11343788
MB		 4880 o = force_list(o);
4881 kid = cLISTOPo->op_first;
79072805
LW		 4882 }
4883 if (kid->op_type == OP_PUSHMARK)
4884 kid = kid->op_sibling;
11343788 4885 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4886 kid = kid->op_sibling;
4887 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4888 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4889 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4890 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4891 cLISTOPo->op_first->op_sibling = kid;
4892 cLISTOPo->op_last = kid;
79072805
LW		 4893 kid = kid->op_sibling;
4894 }
4895 }
4896
4897 if (!kid)
54b9620d 4898 append_elem(o->op_type, o, newDEFSVOP());
79072805 4899
5dc0d613 4900 o = listkids(o);
bbce6d69 4901
5dc0d613 4902 o->op_private = 0;
36477c24 4903#ifdef USE_LOCALE
3280af22 4904 if (PL_hints & HINT_LOCALE)
5dc0d613 4905 o->op_private |= OPpLOCALE;
bbce6d69 4906#endif
4907
5dc0d613 4908 return o;
bbce6d69 4909}
4910
4911OP *
8ac85365 4912ck_fun_locale(OP *o)
bbce6d69 4913{
5dc0d613 4914 o = ck_fun(o);
bbce6d69 4915
5dc0d613 4916 o->op_private = 0;
36477c24 4917#ifdef USE_LOCALE
3280af22 4918 if (PL_hints & HINT_LOCALE)
5dc0d613 4919 o->op_private |= OPpLOCALE;
bbce6d69 4920#endif
4921
5dc0d613 4922 return o;
bbce6d69 4923}
4924
4925OP *
8ac85365 4926ck_scmp(OP *o)
bbce6d69 4927{
5dc0d613 4928 o->op_private = 0;
36477c24 4929#ifdef USE_LOCALE
3280af22 4930 if (PL_hints & HINT_LOCALE)
5dc0d613 4931 o->op_private |= OPpLOCALE;
bbce6d69 4932#endif
36477c24 4933
5dc0d613 4934 return o;
79072805
LW		 4935}
4936
4937OP *
8ac85365 4938ck_match(OP *o)
79072805 4939{
5dc0d613 4940 o->op_private |= OPpRUNTIME;
11343788 4941 return o;
79072805
LW		 4942}
4943
4944OP *
8ac85365 4945ck_null(OP *o)
79072805 4946{
11343788 4947 return o;
79072805
LW		 4948}
4949
4950OP *
8ac85365 4951ck_repeat(OP *o)
79072805 4952{
11343788
MB		 4953 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4954 o->op_private |= OPpREPEAT_DOLIST;
4955 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4956 }
4957 else
11343788
MB		 4958 scalar(o);
4959 return o;
79072805
LW		 4960}
4961
4962OP *
8ac85365 4963ck_require(OP *o)
8990e307 4964{
11343788
MB		 4965 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4966 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4967
4968 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4969 char *s;
a0d0e21e
LW		 4970 for (s = SvPVX(kid->op_sv); *s; s++) {
4971 if (*s == ':' && s[1] == ':') {
4972 *s = '/';
1aef975c 4973 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4974 --SvCUR(kid->op_sv);
4975 }
8990e307 4976 }
a0d0e21e 4977 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4978 }
4979 }
11343788 4980 return ck_fun(o);
8990e307
LW		 4981}
4982
22c35a8c 4983#if 0
8990e307 4984OP *
8ac85365 4985ck_retarget(OP *o)
79072805 4986{
463ee0b2 4987 croak("NOT IMPL LINE %d",__LINE__);
79072805 4988 /* STUB */
11343788 4989 return o;
79072805 4990}
22c35a8c 4991#endif
79072805
LW		 4992
4993OP *
8ac85365 4994ck_select(OP *o)
79072805 4995{
c07a80fd 4996 OP* kid;
11343788
MB		 4997 if (o->op_flags & OPf_KIDS) {
4998 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4999 if (kid && kid->op_sibling) {
11343788 5000 o->op_type = OP_SSELECT;
22c35a8c 5001 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5002 o = ck_fun(o);
5003 return fold_constants(o);
79072805
LW		 5004 }
5005 }
11343788
MB		 5006 o = ck_fun(o);
5007 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5008 if (kid && kid->op_type == OP_RV2GV)
5009 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5010 return o;
79072805
LW		 5011}
5012
5013OP *
8ac85365 5014ck_shift(OP *o)
79072805 5015{
11343788 5016 I32 type = o->op_type;
79072805 5017
11343788 5018 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5019 OP *argop;
5020
11343788 5021 op_free(o);
6d4ff0d2 5022#ifdef USE_THREADS
533c011a 5023 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5024 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5025 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5026 }
5027 else {
5028 argop = newUNOP(OP_RV2AV, 0,
5029 scalar(newGVOP(OP_GV, 0,
5030 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5031 }
5032#else
5033 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5034 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5035 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5036#endif /* USE_THREADS */
5037 return newUNOP(type, 0, scalar(argop));
79072805 5038 }
11343788 5039 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5040}
5041
5042OP *
8ac85365 5043ck_sort(OP *o)
79072805 5044{
5dc0d613 5045 o->op_private = 0;
36477c24 5046#ifdef USE_LOCALE
3280af22 5047 if (PL_hints & HINT_LOCALE)
5dc0d613 5048 o->op_private |= OPpLOCALE;
bbce6d69 5049#endif
5050
11343788
MB		 5051 if (o->op_flags & OPf_STACKED) {
5052 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 5053 OP *k;
5054 kid = kUNOP->op_first; /* get past rv2gv */
79072805 5055
463ee0b2 5056 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5057 linklist(kid);
463ee0b2
LW		 5058 if (kid->op_type == OP_SCOPE) {
5059 k = kid->op_next;
5060 kid->op_next = 0;
79072805 5061 }
463ee0b2 5062 else if (kid->op_type == OP_LEAVE) {
11343788 5063 if (o->op_type == OP_SORT) {
748a9306
LW		 5064 null(kid); /* wipe out leave */
5065 kid->op_next = kid;
463ee0b2 5066
748a9306
LW		 5067 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5068 if (k->op_next == kid)
5069 k->op_next = 0;
5070 }
463ee0b2 5071 }
748a9306
LW		 5072 else
5073 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5074 k = kLISTOP->op_first;
463ee0b2 5075 }
a0d0e21e
LW		 5076 peep(k);
5077
11343788 5078 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 5079 null(kid); /* wipe out rv2gv */
11343788 5080 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5081 kid->op_next = kid;
5082 else
5083 kid->op_next = k;
11343788 5084 o->op_flags |= OPf_SPECIAL;
79072805 5085 }
c6e96bcb
GS		 5086 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5087 null(cLISTOPo->op_first->op_sibling);
79072805 5088 }
bbce6d69 5089
11343788 5090 return o;
79072805
LW		 5091}
5092
5093OP *
8ac85365 5094ck_split(OP *o)
79072805
LW		 5095{
5096 register OP *kid;
aeea060c 5097
11343788
MB		 5098 if (o->op_flags & OPf_STACKED)
5099 return no_fh_allowed(o);
79072805 5100
11343788 5101 kid = cLISTOPo->op_first;
8990e307 5102 if (kid->op_type != OP_NULL)
463ee0b2 5103 croak("panic: ck_split");
8990e307 5104 kid = kid->op_sibling;
11343788
MB		 5105 op_free(cLISTOPo->op_first);
5106 cLISTOPo->op_first = kid;
85e6fe83 5107 if (!kid) {
11343788
MB		 5108 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
5109 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5110 }
79072805
LW		 5111
5112 if (kid->op_type != OP_MATCH) {
5113 OP *sibl = kid->op_sibling;
463ee0b2 5114 kid->op_sibling = 0;
79072805 5115 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5116 if (cLISTOPo->op_first == cLISTOPo->op_last)
5117 cLISTOPo->op_last = kid;
5118 cLISTOPo->op_first = kid;
79072805
LW		 5119 kid->op_sibling = sibl;
5120 }
5121
5122 kid->op_type = OP_PUSHRE;
22c35a8c 5123 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5124 scalar(kid);
5125
5126 if (!kid->op_sibling)
54b9620d 5127 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5128
5129 kid = kid->op_sibling;
5130 scalar(kid);
5131
5132 if (!kid->op_sibling)
11343788 5133 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5134
5135 kid = kid->op_sibling;
5136 scalar(kid);
5137
5138 if (kid->op_sibling)
22c35a8c 5139 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5140
11343788 5141 return o;
79072805
LW		 5142}
5143
5144OP *
8ac85365 5145ck_subr(OP *o)
79072805 5146{
11343788
MB		 5147 dTHR;
5148 OP *prev = ((cUNOPo->op_first->op_sibling)
5149 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5150 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5151 OP *cvop;
5152 char *proto = 0;
5153 CV *cv = 0;
46fc3d4c 5154 GV *namegv = 0;
4633a7c4
LW		 5155 int optional = 0;
5156 I32 arg = 0;
2d8e6c8d 5157 STRLEN n_a;
4633a7c4 5158
11343788 5159 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5160 if (cvop->op_type == OP_RV2CV) {
5161 SVOP* tmpop;
11343788 5162 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5163 null(cvop); /* disable rv2cv */
5164 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
5165 if (tmpop->op_type == OP_GV) {
8ebc5c01 5166 cv = GvCVu(tmpop->op_sv);
5dc0d613 5167 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 5168 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
2d8e6c8d 5169 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5170 }
4633a7c4
LW		 5171 }
5172 }
3280af22
NIS		 5173 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5174 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5175 o->op_private |= OPpENTERSUB_DB;
5176 while (o2 != cvop) {
4633a7c4
LW		 5177 if (proto) {
5178 switch (*proto) {
5179 case '\0':
5dc0d613 5180 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5181 case ';':
5182 optional = 1;
5183 proto++;
5184 continue;
5185 case '$':
5186 proto++;
5187 arg++;
11343788 5188 scalar(o2);
4633a7c4
LW		 5189 break;
5190 case '%':
5191 case '@':
11343788 5192 list(o2);
4633a7c4
LW		 5193 arg++;
5194 break;
5195 case '&':
5196 proto++;
5197 arg++;
11343788 5198 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5199 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5200 break;
5201 case '*':
5202 proto++;
5203 arg++;
11343788 5204 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 5205 goto wrapref;
5206 {
11343788 5207 OP* kid = o2;
69dcf70c 5208 OP* sib = kid->op_sibling;
4633a7c4 5209 kid->op_sibling = 0;
69dcf70c
MB		 5210 o2 = newUNOP(OP_RV2GV, 0, kid);
5211 o2->op_sibling = sib;
6fa846a0 5212 prev->op_sibling = o2;
4633a7c4
LW		 5213 }
5214 goto wrapref;
5215 case '\\':
5216 proto++;
5217 arg++;
5218 switch (*proto++) {
5219 case '*':
11343788 5220 if (o2->op_type != OP_RV2GV)
5dc0d613 5221 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5222 goto wrapref;
5223 case '&':
11343788 5224 if (o2->op_type != OP_RV2CV)
5dc0d613 5225 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5226 goto wrapref;
5227 case '$':
386acf99
GS		 5228 if (o2->op_type != OP_RV2SV
5229 && o2->op_type != OP_PADSV
5230 && o2->op_type != OP_THREADSV)
5231 {
5dc0d613 5232 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5233 }
4633a7c4
LW		 5234 goto wrapref;
5235 case '@':
11343788 5236 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5237 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5238 goto wrapref;
5239 case '%':
11343788 5240 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5241 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5242 wrapref:
5243 {
11343788 5244 OP* kid = o2;
6fa846a0 5245 OP* sib = kid->op_sibling;
4633a7c4 5246 kid->op_sibling = 0;
6fa846a0
GS		 5247 o2 = newUNOP(OP_REFGEN, 0, kid);
5248 o2->op_sibling = sib;
e858de61 5249 prev->op_sibling = o2;
4633a7c4
LW		 5250 }
5251 break;
5252 default: goto oops;
5253 }
5254 break;
b1cb66bf 5255 case ' ':
5256 proto++;
5257 continue;
4633a7c4
LW		 5258 default:
5259 oops:
5260 croak("Malformed prototype for %s: %s",
2d8e6c8d 5261 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 5262 }
5263 }
5264 else
11343788
MB		 5265 list(o2);
5266 mod(o2, OP_ENTERSUB);
5267 prev = o2;
5268 o2 = o2->op_sibling;
4633a7c4 5269 }
fb73857a 5270 if (proto && !optional &&
5271 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5272 return too_few_arguments(o, gv_ename(namegv));
11343788 5273 return o;
79072805
LW		 5274}
5275
5276OP *
8ac85365 5277ck_svconst(OP *o)
8990e307 5278{
11343788
MB		 5279 SvREADONLY_on(cSVOPo->op_sv);
5280 return o;
8990e307
LW		 5281}
5282
5283OP *
8ac85365 5284ck_trunc(OP *o)
79072805 5285{
11343788
MB		 5286 if (o->op_flags & OPf_KIDS) {
5287 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5288
a0d0e21e
LW		 5289 if (kid->op_type == OP_NULL)
5290 kid = (SVOP*)kid->op_sibling;
5291 if (kid &&
5292 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 5293 o->op_flags |= OPf_SPECIAL;
79072805 5294 }
11343788 5295 return ck_fun(o);
79072805
LW		 5296}
5297
463ee0b2
LW		 5298/* A peephole optimizer. We visit the ops in the order they're to execute. */
5299
79072805 5300void
8ac85365 5301peep(register OP *o)
79072805 5302{
11343788 5303 dTHR;
79072805 5304 register OP* oldop = 0;
2d8e6c8d
GS		 5305 STRLEN n_a;
5306
a0d0e21e 5307 if (!o || o->op_seq)
79072805 5308 return;
a0d0e21e 5309 ENTER;
462e5cf6 5310 SAVEOP();
3280af22 5311 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5312 for (; o; o = o->op_next) {
5313 if (o->op_seq)
5314 break;
3280af22
NIS		 5315 if (!PL_op_seqmax)
5316 PL_op_seqmax++;
533c011a 5317 PL_op = o;
a0d0e21e
LW		 5318 switch (o->op_type) {
5319 case OP_NEXTSTATE:
5320 case OP_DBSTATE:
3280af22
NIS		 5321 PL_curcop = ((COP*)o); /* for warnings */
5322 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5323 break;
5324
5325 case OP_CONCAT:
5326 case OP_CONST:
5327 case OP_JOIN:
5328 case OP_UC:
5329 case OP_UCFIRST:
5330 case OP_LC:
5331 case OP_LCFIRST:
5332 case OP_QUOTEMETA:
3c4f770c 5333 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 5334 null(o->op_next);
3280af22 5335 o->op_seq = PL_op_seqmax++;
a0d0e21e 5336 break;
8990e307 5337 case OP_STUB:
54310121 5338 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5339 o->op_seq = PL_op_seqmax++;
54310121 5340 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5341 }
748a9306 5342 goto nothin;
79072805 5343 case OP_NULL:
748a9306 5344 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 5345 PL_curcop = ((COP*)o);
748a9306 5346 goto nothin;
79072805 5347 case OP_SCALAR:
93a17b20 5348 case OP_LINESEQ:
463ee0b2 5349 case OP_SCOPE:
748a9306 5350 nothin:
a0d0e21e
LW		 5351 if (oldop && o->op_next) {
5352 oldop->op_next = o->op_next;
79072805
LW		 5353 continue;
5354 }
3280af22 5355 o->op_seq = PL_op_seqmax++;
79072805
LW		 5356 break;
5357
5358 case OP_GV:
a0d0e21e 5359 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5360 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5361 null(o->op_next);
5362 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5363 o->op_next = o->op_next->op_next;
5364 o->op_type = OP_GVSV;
22c35a8c 5365 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 5366 }
5367 }
a0d0e21e
LW		 5368 else if (o->op_next->op_type == OP_RV2AV) {
5369 OP* pop = o->op_next->op_next;
5370 IV i;
8990e307 5371 if (pop->op_type == OP_CONST &&
533c011a 5372 (PL_op = pop->op_next) &&
8990e307 5373 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5374 !(pop->op_next->op_private &
68dc0745 5375 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5376 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5377 <= 255 &&
8990e307
LW		 5378 i >= 0)
5379 {
748a9306 5380 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 5381 null(o->op_next);
8990e307
LW		 5382 null(pop->op_next);
5383 null(pop);
a0d0e21e
LW		 5384 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5385 o->op_next = pop->op_next->op_next;
5386 o->op_type = OP_AELEMFAST;
22c35a8c 5387 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 5388 o->op_private = (U8)i;
a6006777 5389 GvAVn(((GVOP*)o)->op_gv);
8990e307 5390 }
79072805 5391 }
3280af22 5392 o->op_seq = PL_op_seqmax++;
79072805
LW		 5393 break;
5394
a0d0e21e 5395 case OP_MAPWHILE:
79072805
LW		 5396 case OP_GREPWHILE:
5397 case OP_AND:
5398 case OP_OR:
3280af22 5399 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5400 while (cLOGOP->op_other->op_type == OP_NULL)
5401 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5402 peep(cLOGOP->op_other);
5403 break;
5404
5405 case OP_COND_EXPR:
3280af22 5406 o->op_seq = PL_op_seqmax++;
79072805
LW		 5407 peep(cCONDOP->op_true);
5408 peep(cCONDOP->op_false);
5409 break;
5410
5411 case OP_ENTERLOOP:
3280af22 5412 o->op_seq = PL_op_seqmax++;
79072805
LW		 5413 peep(cLOOP->op_redoop);
5414 peep(cLOOP->op_nextop);
5415 peep(cLOOP->op_lastop);
5416 break;
5417
8782bef2 5418 case OP_QR:
79072805
LW		 5419 case OP_MATCH:
5420 case OP_SUBST:
3280af22 5421 o->op_seq = PL_op_seqmax++;
a0d0e21e 5422 peep(cPMOP->op_pmreplstart);
79072805
LW		 5423 break;
5424
a0d0e21e 5425 case OP_EXEC:
3280af22 5426 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5427 if (ckWARN(WARN_SYNTAX) && o->op_next
5428 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5429 if (o->op_next->op_sibling &&
20408e3c
GS		 5430 o->op_next->op_sibling->op_type != OP_EXIT &&
5431 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5432 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5433 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5434
3280af22 5435 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
599cee73
PM		 5436 warner(WARN_SYNTAX, "Statement unlikely to be reached");
5437 warner(WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5438 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5439 }
5440 }
5441 break;
aeea060c 5442
c750a3ec
MB		 5443 case OP_HELEM: {
5444 UNOP *rop;
5445 SV *lexname;
5446 GV **fields;
5447 SV **svp, **indsvp;
5448 I32 ind;
5449 char *key;
5450 STRLEN keylen;
aeea060c 5451
c750a3ec
MB		 5452 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
5453 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5454 break;
5455 rop = (UNOP*)((BINOP*)o)->op_first;
5456 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5457 break;
3280af22 5458 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 5459 if (!SvOBJECT(lexname))
5460 break;
5196be3e 5461 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5462 if (!fields || !GvHV(*fields))
5463 break;
5464 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5465 key = SvPV(*svp, keylen);
5466 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5467 if (!indsvp) {
5468 croak("No such field \"%s\" in variable %s of type %s",
2d8e6c8d 5469 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 5470 }
5471 ind = SvIV(*indsvp);
5472 if (ind < 1)
5473 croak("Bad index while coercing array into hash");
5474 rop->op_type = OP_RV2AV;
22c35a8c 5475 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 5476 o->op_type = OP_AELEM;
22c35a8c 5477 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 5478 SvREFCNT_dec(*svp);
5479 *svp = newSViv(ind);
5480 break;
5481 }
5482
79072805 5483 default:
3280af22 5484 o->op_seq = PL_op_seqmax++;
79072805
LW		 5485 break;
5486 }
a0d0e21e 5487 oldop = o;
79072805 5488 }
a0d0e21e 5489 LEAVE;
79072805 5490}
Unnamed repository; edit this file 'description' to name the repository.