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a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, 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"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e
GS		 24
25/* XXXXXX testing */
af365420
GS		 26#ifdef USE_ITHREADS
27# define OP_REFCNT_LOCK NOOP
28# define OP_REFCNT_UNLOCK NOOP
29# define OpREFCNT_set(o,n) ((o)->op_targ = (n))
30# define OpREFCNT_dec(o) (--(o)->op_targ)
31#else
32# define OP_REFCNT_LOCK NOOP
33# define OP_REFCNT_UNLOCK NOOP
34# define OpREFCNT_set(o,n) NOOP
35# define OpREFCNT_dec(o) 0
36#endif
7934575e 37
b7dc083c
NIS		 38#ifdef PL_OP_SLAB_ALLOC
39#define SLAB_SIZE 8192
40static char *PL_OpPtr = NULL;
41static int PL_OpSpace = 0;
42#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
43 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
44 else \
45 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
46 } while (0)
47
864dbfa3 48STATIC void *
cea2e8a9 49S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 50{
51 Newz(m,PL_OpPtr,SLAB_SIZE,char);
52 PL_OpSpace = SLAB_SIZE - sz;
53 return PL_OpPtr += PL_OpSpace;
54}
76e3520e 55
b7dc083c
NIS		 56#else
57#define NewOp(m, var, c, type) Newz(m, var, c, type)
58#endif
e50aee73 59/*
5dc0d613 60 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 61 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 62 */
11343788 63#define CHECKOP(type,o) \
3280af22 64 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 65 ? ( op_free((OP*)o), \
cea2e8a9 66 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 67 Nullop ) \
fc0dc3b3 68 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 69
c53d7c7d
HS		 70#define PAD_MAX 999999999
71
76e3520e 72STATIC char*
cea2e8a9 73S_gv_ename(pTHX_ GV *gv)
4633a7c4 74{
2d8e6c8d 75 STRLEN n_a;
4633a7c4 76 SV* tmpsv = sv_newmortal();
46fc3d4c 77 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 78 return SvPV(tmpsv,n_a);
4633a7c4
LW		 79}
80
76e3520e 81STATIC OP *
cea2e8a9 82S_no_fh_allowed(pTHX_ OP *o)
79072805 83{
cea2e8a9 84 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 85 PL_op_desc[o->op_type]));
11343788 86 return o;
79072805
LW		 87}
88
76e3520e 89STATIC OP *
cea2e8a9 90S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 91{
cea2e8a9 92 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 93 return o;
79072805
LW		 94}
95
76e3520e 96STATIC OP *
cea2e8a9 97S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 98{
cea2e8a9 99 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 100 return o;
79072805
LW		 101}
102
76e3520e 103STATIC void
cea2e8a9 104S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 105{
cea2e8a9 106 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 107 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 108}
109
7a52d87a 110STATIC void
cea2e8a9 111S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 112{
5a844595
GS		 113 qerror(Perl_mess(aTHX_
114 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 115 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 116}
117
79072805
LW		 118/* "register" allocation */
119
120PADOFFSET
864dbfa3 121Perl_pad_allocmy(pTHX_ char *name)
93a17b20 122{
11343788 123 dTHR;
a0d0e21e
LW		 124 PADOFFSET off;
125 SV *sv;
126
834a4ddd 127 if (!(
77ca0c92 128 PL_in_my == KEY_our ||
834a4ddd
LW		 129 isALPHA(name[1]) ||
130 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
77ca0c92 131 name[1] == '_' && (int)strlen(name) > 2 ))
834a4ddd 132 {
c4d0567e 133 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 134 /* 1999-02-27 mjd@plover.com */
135 char *p;
136 p = strchr(name, '\0');
137 /* The next block assumes the buffer is at least 205 chars
138 long. At present, it's always at least 256 chars. */
139 if (p-name > 200) {
140 strcpy(name+200, "...");
141 p = name+199;
142 }
143 else {
144 p[1] = '\0';
145 }
146 /* Move everything else down one character */
147 for (; p-name > 2; p--)
148 *p = *(p-1);
46fc3d4c 149 name[2] = toCTRL(name[1]);
150 name[1] = '^';
151 }
cea2e8a9 152 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 153 }
599cee73 154 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 155 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 156 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
157 PADOFFSET top = AvFILLp(PL_comppad_name);
158 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 159 if ((sv = svp[off])
3280af22 160 && sv != &PL_sv_undef
c53d7c7d 161 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 162 && (PL_in_my != KEY_our
163 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 164 && strEQ(name, SvPVX(sv)))
165 {
33633739
GS		 166 Perl_warner(aTHX_ WARN_UNSAFE,
167 "\"%s\" variable %s masks earlier declaration in same %s",
168 (PL_in_my == KEY_our ? "our" : "my"),
169 name,
170 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
171 --off;
172 break;
173 }
174 }
175 if (PL_in_my == KEY_our) {
176 while (off >= 0 && off <= top) {
177 if ((sv = svp[off])
178 && sv != &PL_sv_undef
179 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
180 && strEQ(name, SvPVX(sv)))
f472eb5c
GS		 181 {
182 Perl_warner(aTHX_ WARN_UNSAFE,
33633739
GS		 183 "\"our\" variable %s redeclared", name);
184 Perl_warner(aTHX_ WARN_UNSAFE,
185 "(Did you mean \"local\" instead of \"our\"?)\n");
186 break;
f472eb5c 187 }
33633739 188 --off;
b1cb66bf 189 }
190 }
191 }
a0d0e21e
LW		 192 off = pad_alloc(OP_PADSV, SVs_PADMY);
193 sv = NEWSV(1102,0);
93a17b20
LW		 194 sv_upgrade(sv, SVt_PVNV);
195 sv_setpv(sv, name);
3280af22 196 if (PL_in_my_stash) {
c750a3ec 197 if (*name != '$')
eb64745e
GS		 198 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
199 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 200 SvOBJECT_on(sv);
201 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 202 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
203 PL_sv_objcount++;
c750a3ec 204 }
f472eb5c
GS		 205 if (PL_in_my == KEY_our) {
206 (void)SvUPGRADE(sv, SVt_PVGV);
207 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? PL_curstash : PL_defstash);
77ca0c92 208 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 209 }
3280af22 210 av_store(PL_comppad_name, off, sv);
65202027 211 SvNVX(sv) = (NV)PAD_MAX;
8990e307 212 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 213 if (!PL_min_intro_pending)
214 PL_min_intro_pending = off;
215 PL_max_intro_pending = off;
93a17b20 216 if (*name == '@')
3280af22 217 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 218 else if (*name == '%')
3280af22
NIS		 219 av_store(PL_comppad, off, (SV*)newHV());
220 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 221 return off;
222}
223
94f23f41
GS		 224STATIC PADOFFSET
225S_pad_addlex(pTHX_ SV *proto_namesv)
226{
227 SV *namesv = NEWSV(1103,0);
228 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
229 sv_upgrade(namesv, SVt_PVNV);
230 sv_setpv(namesv, SvPVX(proto_namesv));
231 av_store(PL_comppad_name, newoff, namesv);
232 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
233 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
234 SvFAKE_on(namesv); /* A ref, not a real var */
235 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
236 SvFLAGS(namesv) |= SVpad_OUR;
237 (void)SvUPGRADE(namesv, SVt_PVGV);
238 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
239 }
240 if (SvOBJECT(proto_namesv)) { /* A typed var */
241 SvOBJECT_on(namesv);
242 (void)SvUPGRADE(namesv, SVt_PVMG);
243 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
244 PL_sv_objcount++;
245 }
246 return newoff;
247}
248
2680586e
GS		 249#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
250
76e3520e 251STATIC PADOFFSET
cea2e8a9 252S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 253 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 254{
11343788 255 dTHR;
748a9306 256 CV *cv;
93a17b20
LW		 257 I32 off;
258 SV *sv;
93a17b20 259 register I32 i;
c09156bb 260 register PERL_CONTEXT *cx;
93a17b20 261
748a9306 262 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 263 AV *curlist = CvPADLIST(cv);
264 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 265 AV *curname;
4fdae800 266
3280af22 267 if (!svp || *svp == &PL_sv_undef)
4633a7c4 268 continue;
748a9306
LW		 269 curname = (AV*)*svp;
270 svp = AvARRAY(curname);
93965878 271 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 272 if ((sv = svp[off]) &&
3280af22 273 sv != &PL_sv_undef &&
748a9306 274 seq <= SvIVX(sv) &&
13826f2c 275 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 276 strEQ(SvPVX(sv), name))
277 {
5f05dabc 278 I32 depth;
279 AV *oldpad;
280 SV *oldsv;
281
282 depth = CvDEPTH(cv);
283 if (!depth) {
9607fc9c 284 if (newoff) {
285 if (SvFAKE(sv))
286 continue;
4fdae800 287 return 0; /* don't clone from inactive stack frame */
9607fc9c 288 }
5f05dabc 289 depth = 1;
290 }
94f23f41 291 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 292 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 293 if (!newoff) { /* Not a mere clone operation. */
94f23f41 294 newoff = pad_addlex(sv);
3280af22 295 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 296 /* "It's closures all the way down." */
3280af22 297 CvCLONE_on(PL_compcv);
54310121 298 if (cv == startcv) {
3280af22 299 if (CvANON(PL_compcv))
54310121 300 oldsv = Nullsv; /* no need to keep ref */
301 }
302 else {
28757baa 303 CV *bcv;
304 for (bcv = startcv;
305 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 306 bcv = CvOUTSIDE(bcv))
307 {
94f23f41
GS		 308 if (CvANON(bcv)) {
309 /* install the missing pad entry in intervening
310 * nested subs and mark them cloneable.
311 * XXX fix pad_foo() to not use globals */
312 AV *ocomppad_name = PL_comppad_name;
313 AV *ocomppad = PL_comppad;
314 SV **ocurpad = PL_curpad;
315 AV *padlist = CvPADLIST(bcv);
316 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
317 PL_comppad = (AV*)AvARRAY(padlist)[1];
318 PL_curpad = AvARRAY(PL_comppad);
319 pad_addlex(sv);
320 PL_comppad_name = ocomppad_name;
321 PL_comppad = ocomppad;
322 PL_curpad = ocurpad;
28757baa 323 CvCLONE_on(bcv);
94f23f41 324 }
28757baa 325 else {
6b35e009
GS		 326 if (ckWARN(WARN_CLOSURE)
327 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
328 {
cea2e8a9 329 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 330 "Variable \"%s\" may be unavailable",
28757baa 331 name);
6b35e009 332 }
28757baa 333 break;
334 }
335 }
336 }
337 }
3280af22 338 else if (!CvUNIQUE(PL_compcv)) {
599cee73 339 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 340 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 341 "Variable \"%s\" will not stay shared", name);
5f05dabc 342 }
748a9306 343 }
3280af22 344 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 345 return newoff;
346 }
93a17b20
LW		 347 }
348 }
349
2680586e
GS		 350 if (flags & FINDLEX_NOSEARCH)
351 return 0;
352
93a17b20
LW		 353 /* Nothing in current lexical context--try eval's context, if any.
354 * This is necessary to let the perldb get at lexically scoped variables.
355 * XXX This will also probably interact badly with eval tree caching.
356 */
357
748a9306 358 for (i = cx_ix; i >= 0; i--) {
93a17b20 359 cx = &cxstack[i];
6b35e009 360 switch (CxTYPE(cx)) {
93a17b20 361 default:
748a9306
LW		 362 if (i == 0 && saweval) {
363 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 364 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 365 }
93a17b20
LW		 366 break;
367 case CXt_EVAL:
44a8e56a 368 switch (cx->blk_eval.old_op_type) {
369 case OP_ENTEREVAL:
6b35e009
GS		 370 if (CxREALEVAL(cx))
371 saweval = i;
44a8e56a 372 break;
373 case OP_REQUIRE:
374 /* require must have its own scope */
375 return 0;
376 }
93a17b20 377 break;
7766f137 378 case CXt_FORMAT:
93a17b20
LW		 379 case CXt_SUB:
380 if (!saweval)
381 return 0;
382 cv = cx->blk_sub.cv;
3280af22 383 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 384 saweval = i; /* so we know where we were called from */
93a17b20 385 continue;
93a17b20 386 }
748a9306 387 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 388 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 389 }
390 }
391
748a9306
LW		 392 return 0;
393}
a0d0e21e 394
748a9306 395PADOFFSET
864dbfa3 396Perl_pad_findmy(pTHX_ char *name)
748a9306 397{
11343788 398 dTHR;
748a9306 399 I32 off;
54310121 400 I32 pendoff = 0;
748a9306 401 SV *sv;
3280af22
NIS		 402 SV **svp = AvARRAY(PL_comppad_name);
403 U32 seq = PL_cop_seqmax;
6b35e009 404 PERL_CONTEXT *cx;
33b8ce05 405 CV *outside;
748a9306 406
11343788
MB		 407#ifdef USE_THREADS
408 /*
409 * Special case to get lexical (and hence per-thread) @_.
410 * XXX I need to find out how to tell at parse-time whether use
411 * of @_ should refer to a lexical (from a sub) or defgv (global
412 * scope and maybe weird sub-ish things like formats). See
413 * startsub in perly.y. It's possible that @_ could be lexical
414 * (at least from subs) even in non-threaded perl.
415 */
416 if (strEQ(name, "@_"))
417 return 0; /* success. (NOT_IN_PAD indicates failure) */
418#endif /* USE_THREADS */
419
748a9306 420 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 421 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 422 if ((sv = svp[off]) &&
3280af22 423 sv != &PL_sv_undef &&
54310121 424 (!SvIVX(sv) ||
425 (seq <= SvIVX(sv) &&
426 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 427 strEQ(SvPVX(sv), name))
428 {
77ca0c92 429 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 430 return (PADOFFSET)off;
431 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 432 }
433 }
748a9306 434
33b8ce05
GS		 435 outside = CvOUTSIDE(PL_compcv);
436
437 /* Check if if we're compiling an eval'', and adjust seq to be the
438 * eval's seq number. This depends on eval'' having a non-null
439 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 440 * identified by CvEVAL being true and CvGV being null. */
441 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 442 cx = &cxstack[cxstack_ix];
443 if (CxREALEVAL(cx))
444 seq = cx->blk_oldcop->cop_seq;
445 }
446
748a9306 447 /* See if it's in a nested scope */
2680586e 448 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 449 if (off) {
450 /* If there is a pending local definition, this new alias must die */
451 if (pendoff)
3280af22 452 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 453 return off; /* pad_findlex returns 0 for failure...*/
54310121 454 }
11343788 455 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 456}
457
458void
864dbfa3 459Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 460{
0453d815 461 dTHR;
93a17b20 462 I32 off;
3280af22 463 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 464 SV *sv;
3280af22
NIS		 465 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
466 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 467 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
468 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 469 }
470 }
471 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 472 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 473 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 474 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 475 }
476}
477
478PADOFFSET
864dbfa3 479Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 480{
11343788 481 dTHR;
79072805
LW		 482 SV *sv;
483 I32 retval;
484
3280af22 485 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 486 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 487 if (PL_pad_reset_pending)
a0d0e21e 488 pad_reset();
ed6116ce 489 if (tmptype & SVs_PADMY) {
79072805 490 do {
3280af22 491 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 492 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 493 retval = AvFILLp(PL_comppad);
79072805
LW		 494 }
495 else {
3280af22
NIS		 496 SV **names = AvARRAY(PL_comppad_name);
497 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 498 for (;;) {
499 /*
500 * "foreach" index vars temporarily become aliases to non-"my"
501 * values. Thus we must skip, not just pad values that are
502 * marked as current pad values, but also those with names.
503 */
3280af22
NIS		 504 if (++PL_padix <= names_fill &&
505 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 506 continue;
3280af22 507 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 508 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 509 break;
510 }
3280af22 511 retval = PL_padix;
79072805 512 }
8990e307 513 SvFLAGS(sv) |= tmptype;
3280af22 514 PL_curpad = AvARRAY(PL_comppad);
11343788 515#ifdef USE_THREADS
b900a521
JH		 516 DEBUG_X(PerlIO_printf(Perl_debug_log,
517 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
518 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 519 (long) retval, PL_op_name[optype]));
11343788 520#else
b900a521
JH		 521 DEBUG_X(PerlIO_printf(Perl_debug_log,
522 "Pad 0x%"UVxf" alloc %ld for %s\n",
523 PTR2UV(PL_curpad),
22c35a8c 524 (long) retval, PL_op_name[optype]));
11343788 525#endif /* USE_THREADS */
79072805
LW		 526 return (PADOFFSET)retval;
527}
528
529SV *
864dbfa3 530Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 531{
11343788
MB		 532 dTHR;
533#ifdef USE_THREADS
b900a521 534 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 535 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
536 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 537#else
79072805 538 if (!po)
cea2e8a9 539 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 540 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
541 PTR2UV(PL_curpad), (IV)po));
11343788 542#endif /* USE_THREADS */
3280af22 543 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 544}
545
546void
864dbfa3 547Perl_pad_free(pTHX_ PADOFFSET po)
79072805 548{
11343788 549 dTHR;
3280af22 550 if (!PL_curpad)
a0d0e21e 551 return;
3280af22 552 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 553 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 554 if (!po)
cea2e8a9 555 Perl_croak(aTHX_ "panic: pad_free po");
11343788 556#ifdef USE_THREADS
b900a521 557 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 558 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 559 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 560#else
97835f67
JH		 561 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
562 PTR2UV(PL_curpad), (IV)po));
11343788 563#endif /* USE_THREADS */
2aa1bedc 564 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 565 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 566#ifdef USE_ITHREADS
567 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
568#endif
569 }
3280af22
NIS		 570 if ((I32)po < PL_padix)
571 PL_padix = po - 1;
79072805
LW		 572}
573
574void
864dbfa3 575Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 576{
11343788 577 dTHR;
3280af22 578 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 579 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 580 if (!po)
cea2e8a9 581 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 582#ifdef USE_THREADS
b900a521 583 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 584 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
585 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 586#else
97835f67
JH		 587 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
588 PTR2UV(PL_curpad), (IV)po));
11343788 589#endif /* USE_THREADS */
3280af22
NIS		 590 SvPADTMP_off(PL_curpad[po]);
591 PL_curpad[po] = NEWSV(1107,0);
592 SvPADTMP_on(PL_curpad[po]);
593 if ((I32)po < PL_padix)
594 PL_padix = po - 1;
79072805
LW		 595}
596
d9bb4600
GS		 597/* XXX pad_reset() is currently disabled because it results in serious bugs.
598 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
599 * on the stack by OPs that use them, there are several ways to get an alias
600 * to a shared TARG. Such an alias will change randomly and unpredictably.
601 * We avoid doing this until we can think of a Better Way.
602 * GSAR 97-10-29 */
79072805 603void
864dbfa3 604Perl_pad_reset(pTHX)
79072805 605{
d9bb4600 606#ifdef USE_BROKEN_PAD_RESET
11343788 607 dTHR;
79072805
LW		 608 register I32 po;
609
6b88bc9c 610 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 611 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 612#ifdef USE_THREADS
b900a521
JH		 613 DEBUG_X(PerlIO_printf(Perl_debug_log,
614 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
615 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 616#else
b900a521
JH		 617 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
618 PTR2UV(PL_curpad)));
11343788 619#endif /* USE_THREADS */
6b88bc9c
GS		 620 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
621 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
622 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
623 SvPADTMP_off(PL_curpad[po]);
748a9306 624 }
6b88bc9c 625 PL_padix = PL_padix_floor;
79072805 626 }
d9bb4600 627#endif
3280af22 628 PL_pad_reset_pending = FALSE;
79072805
LW		 629}
630
a863c7d1 631#ifdef USE_THREADS
54b9620d 632/* find_threadsv is not reentrant */
a863c7d1 633PADOFFSET
864dbfa3 634Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 635{
636 dTHR;
637 char *p;
638 PADOFFSET key;
554b3eca 639 SV **svp;
54b9620d 640 /* We currently only handle names of a single character */
533c011a 641 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 642 if (!p)
643 return NOT_IN_PAD;
533c011a 644 key = p - PL_threadsv_names;
2d8e6c8d 645 MUTEX_LOCK(&thr->mutex);
54b9620d 646 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 647 if (svp)
648 MUTEX_UNLOCK(&thr->mutex);
649 else {
554b3eca 650 SV *sv = NEWSV(0, 0);
54b9620d 651 av_store(thr->threadsv, key, sv);
940cb80d 652 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 653 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 654 /*
655 * Some magic variables used to be automagically initialised
656 * in gv_fetchpv. Those which are now per-thread magicals get
657 * initialised here instead.
658 */
659 switch (*name) {
54b9620d
MB		 660 case '_':
661 break;
554b3eca
MB		 662 case ';':
663 sv_setpv(sv, "\034");
54b9620d 664 sv_magic(sv, 0, 0, name, 1);
554b3eca 665 break;
c277df42
IZ		 666 case '&':
667 case '`':
668 case '\'':
533c011a 669 PL_sawampersand = TRUE;
a3f914c5
GS		 670 /* FALL THROUGH */
671 case '1':
672 case '2':
673 case '3':
674 case '4':
675 case '5':
676 case '6':
677 case '7':
678 case '8':
679 case '9':
c277df42 680 SvREADONLY_on(sv);
d8b5173a 681 /* FALL THROUGH */
067391ea
GS		 682
683 /* XXX %! tied to Errno.pm needs to be added here.
684 * See gv_fetchpv(). */
685 /* case '!': */
686
54b9620d
MB		 687 default:
688 sv_magic(sv, 0, 0, name, 1);
554b3eca 689 }
bf49b057 690 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 691 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 692 sv, (*name < 32) ? "^" : "",
693 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 694 }
695 return key;
696}
697#endif /* USE_THREADS */
698
79072805
LW		 699/* Destructor */
700
701void
864dbfa3 702Perl_op_free(pTHX_ OP *o)
79072805 703{
85e6fe83 704 register OP *kid, *nextkid;
acb36ea4 705 OPCODE type;
79072805 706
5dc0d613 707 if (!o || o->op_seq == (U16)-1)
79072805
LW		 708 return;
709
7934575e
GS		 710 if (o->op_private & OPpREFCOUNTED) {
711 switch (o->op_type) {
712 case OP_LEAVESUB:
713 case OP_LEAVESUBLV:
714 case OP_LEAVEEVAL:
715 case OP_LEAVE:
716 case OP_SCOPE:
717 case OP_LEAVEWRITE:
718 OP_REFCNT_LOCK;
719 if (OpREFCNT_dec(o)) {
720 OP_REFCNT_UNLOCK;
721 return;
722 }
723 OP_REFCNT_UNLOCK;
724 break;
725 default:
726 break;
727 }
728 }
729
11343788
MB		 730 if (o->op_flags & OPf_KIDS) {
731 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 732 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 733 op_free(kid);
85e6fe83 734 }
79072805 735 }
acb36ea4
GS		 736 type = o->op_type;
737 if (type == OP_NULL)
738 type = o->op_targ;
739
740 /* COP* is not cleared by op_clear() so that we may track line
741 * numbers etc even after null() */
742 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
743 cop_free((COP*)o);
744
745 op_clear(o);
746
747#ifdef PL_OP_SLAB_ALLOC
748 if ((char *) o == PL_OpPtr)
749 {
750 }
751#else
752 Safefree(o);
753#endif
754}
79072805 755
acb36ea4
GS		 756STATIC void
757S_op_clear(pTHX_ OP *o)
758{
11343788 759 switch (o->op_type) {
acb36ea4
GS		 760 case OP_NULL: /* Was holding old type, if any. */
761 case OP_ENTEREVAL: /* Was holding hints. */
762#ifdef USE_THREADS
763 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
764#endif
765 o->op_targ = 0;
a0d0e21e 766 break;
554b3eca 767#ifdef USE_THREADS
8dd3ba40
SM		 768 case OP_ENTERITER:
769 if (!(o->op_flags & OPf_SPECIAL))
770 break;
771 /* FALL THROUGH */
554b3eca 772#endif /* USE_THREADS */
a6006777 773 default:
ac4c12e7 774 if (!(o->op_flags & OPf_REF)
0b94c7bb 775 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 776 break;
777 /* FALL THROUGH */
463ee0b2 778 case OP_GVSV:
79072805 779 case OP_GV:
a6006777 780 case OP_AELEMFAST:
350de78d 781#ifdef USE_ITHREADS
971a9dd3
GS		 782 if (cPADOPo->op_padix > 0) {
783 if (PL_curpad) {
638eceb6 784 GV *gv = cGVOPo_gv;
971a9dd3
GS		 785 pad_swipe(cPADOPo->op_padix);
786 /* No GvIN_PAD_off(gv) here, because other references may still
787 * exist on the pad */
788 SvREFCNT_dec(gv);
789 }
790 cPADOPo->op_padix = 0;
791 }
350de78d 792#else
971a9dd3 793 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 794 cSVOPo->op_sv = Nullsv;
350de78d 795#endif
79072805
LW		 796 break;
797 case OP_CONST:
11343788 798 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 799 cSVOPo->op_sv = Nullsv;
79072805 800 break;
748a9306
LW		 801 case OP_GOTO:
802 case OP_NEXT:
803 case OP_LAST:
804 case OP_REDO:
11343788 805 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 806 break;
807 /* FALL THROUGH */
a0d0e21e 808 case OP_TRANS:
acb36ea4 809 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 810 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 811 cSVOPo->op_sv = Nullsv;
812 }
813 else {
a0ed51b3 814 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 815 cPVOPo->op_pv = Nullch;
816 }
a0d0e21e
LW		 817 break;
818 case OP_SUBST:
11343788 819 op_free(cPMOPo->op_pmreplroot);
971a9dd3 820 goto clear_pmop;
748a9306 821 case OP_PUSHRE:
971a9dd3
GS		 822#ifdef USE_ITHREADS
823 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
824 if (PL_curpad) {
825 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
826 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
827 /* No GvIN_PAD_off(gv) here, because other references may still
828 * exist on the pad */
829 SvREFCNT_dec(gv);
830 }
831 }
832#else
833 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
834#endif
835 /* FALL THROUGH */
a0d0e21e 836 case OP_MATCH:
8782bef2 837 case OP_QR:
971a9dd3
GS		 838clear_pmop:
839 cPMOPo->op_pmreplroot = Nullop;
c277df42 840 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 841 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 842 break;
79072805
LW		 843 }
844
743e66e6 845 if (o->op_targ > 0) {
11343788 846 pad_free(o->op_targ);
743e66e6
GS		 847 o->op_targ = 0;
848 }
79072805
LW		 849}
850
76e3520e 851STATIC void
3eb57f73
HS		 852S_cop_free(pTHX_ COP* cop)
853{
854 Safefree(cop->cop_label);
57843af0
GS		 855#ifdef USE_ITHREADS
856 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 857 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 858#else
11faa288 859 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 860 SvREFCNT_dec(CopFILEGV(cop));
57843af0 861#endif
0453d815 862 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 863 SvREFCNT_dec(cop->cop_warnings);
864}
865
866STATIC void
cea2e8a9 867S_null(pTHX_ OP *o)
8990e307 868{
acb36ea4
GS		 869 if (o->op_type == OP_NULL)
870 return;
871 op_clear(o);
11343788
MB		 872 o->op_targ = o->op_type;
873 o->op_type = OP_NULL;
22c35a8c 874 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 875}
876
79072805
LW		 877/* Contextualizers */
878
463ee0b2 879#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 880
881OP *
864dbfa3 882Perl_linklist(pTHX_ OP *o)
79072805
LW		 883{
884 register OP *kid;
885
11343788
MB		 886 if (o->op_next)
887 return o->op_next;
79072805
LW		 888
889 /* establish postfix order */
11343788
MB		 890 if (cUNOPo->op_first) {
891 o->op_next = LINKLIST(cUNOPo->op_first);
892 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 893 if (kid->op_sibling)
894 kid->op_next = LINKLIST(kid->op_sibling);
895 else
11343788 896 kid->op_next = o;
79072805
LW		 897 }
898 }
899 else
11343788 900 o->op_next = o;
79072805 901
11343788 902 return o->op_next;
79072805
LW		 903}
904
905OP *
864dbfa3 906Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 907{
908 OP *kid;
11343788
MB		 909 if (o && o->op_flags & OPf_KIDS) {
910 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 911 scalar(kid);
912 }
11343788 913 return o;
79072805
LW		 914}
915
76e3520e 916STATIC OP *
cea2e8a9 917S_scalarboolean(pTHX_ OP *o)
8990e307 918{
d008e5eb 919 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 920 dTHR;
d008e5eb 921 if (ckWARN(WARN_SYNTAX)) {
57843af0 922 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 923
d008e5eb 924 if (PL_copline != NOLINE)
57843af0 925 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 926 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 927 CopLINE_set(PL_curcop, oldline);
d008e5eb 928 }
a0d0e21e 929 }
11343788 930 return scalar(o);
8990e307
LW		 931}
932
933OP *
864dbfa3 934Perl_scalar(pTHX_ OP *o)
79072805
LW		 935{
936 OP *kid;
937
a0d0e21e 938 /* assumes no premature commitment */
3280af22 939 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 940 || o->op_type == OP_RETURN)
7e363e51 941 {
11343788 942 return o;
7e363e51 943 }
79072805 944
5dc0d613 945 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 946
11343788 947 switch (o->op_type) {
79072805 948 case OP_REPEAT:
11343788
MB		 949 if (o->op_private & OPpREPEAT_DOLIST)
950 null(((LISTOP*)cBINOPo->op_first)->op_first);
951 scalar(cBINOPo->op_first);
8990e307 952 break;
79072805
LW		 953 case OP_OR:
954 case OP_AND:
955 case OP_COND_EXPR:
11343788 956 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 957 scalar(kid);
79072805 958 break;
a0d0e21e 959 case OP_SPLIT:
11343788 960 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 961 if (!kPMOP->op_pmreplroot)
962 deprecate("implicit split to @_");
963 }
964 /* FALL THROUGH */
79072805 965 case OP_MATCH:
8782bef2 966 case OP_QR:
79072805
LW		 967 case OP_SUBST:
968 case OP_NULL:
8990e307 969 default:
11343788
MB		 970 if (o->op_flags & OPf_KIDS) {
971 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 972 scalar(kid);
973 }
79072805
LW		 974 break;
975 case OP_LEAVE:
976 case OP_LEAVETRY:
5dc0d613 977 kid = cLISTOPo->op_first;
54310121 978 scalar(kid);
979 while (kid = kid->op_sibling) {
980 if (kid->op_sibling)
981 scalarvoid(kid);
982 else
983 scalar(kid);
984 }
3280af22 985 WITH_THR(PL_curcop = &PL_compiling);
54310121 986 break;
748a9306 987 case OP_SCOPE:
79072805 988 case OP_LINESEQ:
8990e307 989 case OP_LIST:
11343788 990 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 991 if (kid->op_sibling)
992 scalarvoid(kid);
993 else
994 scalar(kid);
995 }
3280af22 996 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 997 break;
998 }
11343788 999 return o;
79072805
LW		 1000}
1001
1002OP *
864dbfa3 1003Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 1004{
1005 OP *kid;
8990e307
LW		 1006 char* useless = 0;
1007 SV* sv;
2ebea0a1
GS		 1008 U8 want;
1009
acb36ea4
GS		 1010 if (o->op_type == OP_NEXTSTATE
1011 || o->op_type == OP_SETSTATE
1012 || o->op_type == OP_DBSTATE
1013 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1014 || o->op_targ == OP_SETSTATE
1015 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1016 {
1017 dTHR;
1018 PL_curcop = (COP*)o; /* for warning below */
1019 }
79072805 1020
54310121 1021 /* assumes no premature commitment */
2ebea0a1
GS		 1022 want = o->op_flags & OPf_WANT;
1023 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1024 || o->op_type == OP_RETURN)
7e363e51 1025 {
11343788 1026 return o;
7e363e51 1027 }
79072805 1028
b162f9ea 1029 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1030 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1031 {
b162f9ea 1032 return scalar(o); /* As if inside SASSIGN */
7e363e51 1033 }
b162f9ea 1034
5dc0d613 1035 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1036
11343788 1037 switch (o->op_type) {
79072805 1038 default:
22c35a8c 1039 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1040 break;
36477c24 1041 /* FALL THROUGH */
1042 case OP_REPEAT:
11343788 1043 if (o->op_flags & OPf_STACKED)
8990e307 1044 break;
5d82c453
GA		 1045 goto func_ops;
1046 case OP_SUBSTR:
1047 if (o->op_private == 4)
1048 break;
8990e307
LW		 1049 /* FALL THROUGH */
1050 case OP_GVSV:
1051 case OP_WANTARRAY:
1052 case OP_GV:
1053 case OP_PADSV:
1054 case OP_PADAV:
1055 case OP_PADHV:
1056 case OP_PADANY:
1057 case OP_AV2ARYLEN:
8990e307 1058 case OP_REF:
a0d0e21e
LW		 1059 case OP_REFGEN:
1060 case OP_SREFGEN:
8990e307
LW		 1061 case OP_DEFINED:
1062 case OP_HEX:
1063 case OP_OCT:
1064 case OP_LENGTH:
8990e307
LW		 1065 case OP_VEC:
1066 case OP_INDEX:
1067 case OP_RINDEX:
1068 case OP_SPRINTF:
1069 case OP_AELEM:
1070 case OP_AELEMFAST:
1071 case OP_ASLICE:
8990e307
LW		 1072 case OP_HELEM:
1073 case OP_HSLICE:
1074 case OP_UNPACK:
1075 case OP_PACK:
8990e307
LW		 1076 case OP_JOIN:
1077 case OP_LSLICE:
1078 case OP_ANONLIST:
1079 case OP_ANONHASH:
1080 case OP_SORT:
1081 case OP_REVERSE:
1082 case OP_RANGE:
1083 case OP_FLIP:
1084 case OP_FLOP:
1085 case OP_CALLER:
1086 case OP_FILENO:
1087 case OP_EOF:
1088 case OP_TELL:
1089 case OP_GETSOCKNAME:
1090 case OP_GETPEERNAME:
1091 case OP_READLINK:
1092 case OP_TELLDIR:
1093 case OP_GETPPID:
1094 case OP_GETPGRP:
1095 case OP_GETPRIORITY:
1096 case OP_TIME:
1097 case OP_TMS:
1098 case OP_LOCALTIME:
1099 case OP_GMTIME:
1100 case OP_GHBYNAME:
1101 case OP_GHBYADDR:
1102 case OP_GHOSTENT:
1103 case OP_GNBYNAME:
1104 case OP_GNBYADDR:
1105 case OP_GNETENT:
1106 case OP_GPBYNAME:
1107 case OP_GPBYNUMBER:
1108 case OP_GPROTOENT:
1109 case OP_GSBYNAME:
1110 case OP_GSBYPORT:
1111 case OP_GSERVENT:
1112 case OP_GPWNAM:
1113 case OP_GPWUID:
1114 case OP_GGRNAM:
1115 case OP_GGRGID:
1116 case OP_GETLOGIN:
5d82c453 1117 func_ops:
64aac5a9 1118 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1119 useless = PL_op_desc[o->op_type];
8990e307
LW		 1120 break;
1121
1122 case OP_RV2GV:
1123 case OP_RV2SV:
1124 case OP_RV2AV:
1125 case OP_RV2HV:
192587c2 1126 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1127 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1128 useless = "a variable";
1129 break;
79072805
LW		 1130
1131 case OP_CONST:
7766f137 1132 sv = cSVOPo_sv;
7a52d87a
GS		 1133 if (cSVOPo->op_private & OPpCONST_STRICT)
1134 no_bareword_allowed(o);
1135 else {
d008e5eb
GS		 1136 dTHR;
1137 if (ckWARN(WARN_VOID)) {
1138 useless = "a constant";
1139 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1140 useless = 0;
1141 else if (SvPOK(sv)) {
1142 if (strnEQ(SvPVX(sv), "di", 2) ||
1143 strnEQ(SvPVX(sv), "ds", 2) ||
1144 strnEQ(SvPVX(sv), "ig", 2))
1145 useless = 0;
1146 }
8990e307
LW		 1147 }
1148 }
acb36ea4 1149 null(o); /* don't execute or even remember it */
79072805
LW		 1150 break;
1151
1152 case OP_POSTINC:
11343788 1153 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1154 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1155 break;
1156
1157 case OP_POSTDEC:
11343788 1158 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1159 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1160 break;
1161
79072805
LW		 1162 case OP_OR:
1163 case OP_AND:
1164 case OP_COND_EXPR:
11343788 1165 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1166 scalarvoid(kid);
1167 break;
5aabfad6 1168
a0d0e21e 1169 case OP_NULL:
11343788 1170 if (o->op_flags & OPf_STACKED)
a0d0e21e 1171 break;
5aabfad6 1172 /* FALL THROUGH */
2ebea0a1
GS		 1173 case OP_NEXTSTATE:
1174 case OP_DBSTATE:
79072805
LW		 1175 case OP_ENTERTRY:
1176 case OP_ENTER:
1177 case OP_SCALAR:
11343788 1178 if (!(o->op_flags & OPf_KIDS))
79072805 1179 break;
54310121 1180 /* FALL THROUGH */
463ee0b2 1181 case OP_SCOPE:
79072805
LW		 1182 case OP_LEAVE:
1183 case OP_LEAVETRY:
a0d0e21e 1184 case OP_LEAVELOOP:
79072805 1185 case OP_LINESEQ:
79072805 1186 case OP_LIST:
11343788 1187 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1188 scalarvoid(kid);
1189 break;
c90c0ff4 1190 case OP_ENTEREVAL:
5196be3e 1191 scalarkids(o);
c90c0ff4 1192 break;
5aabfad6 1193 case OP_REQUIRE:
c90c0ff4 1194 /* all requires must return a boolean value */
5196be3e
MB		 1195 o->op_flags &= ~OPf_WANT;
1196 return scalar(o);
a0d0e21e 1197 case OP_SPLIT:
11343788 1198 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1199 if (!kPMOP->op_pmreplroot)
1200 deprecate("implicit split to @_");
1201 }
1202 break;
79072805 1203 }
d008e5eb
GS		 1204 if (useless) {
1205 dTHR;
1206 if (ckWARN(WARN_VOID))
cea2e8a9 1207 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1208 }
11343788 1209 return o;
79072805
LW		 1210}
1211
1212OP *
864dbfa3 1213Perl_listkids(pTHX_ OP *o)
79072805
LW		 1214{
1215 OP *kid;
11343788
MB		 1216 if (o && o->op_flags & OPf_KIDS) {
1217 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1218 list(kid);
1219 }
11343788 1220 return o;
79072805
LW		 1221}
1222
1223OP *
864dbfa3 1224Perl_list(pTHX_ OP *o)
79072805
LW		 1225{
1226 OP *kid;
1227
a0d0e21e 1228 /* assumes no premature commitment */
3280af22 1229 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1230 || o->op_type == OP_RETURN)
7e363e51 1231 {
11343788 1232 return o;
7e363e51 1233 }
79072805 1234
b162f9ea 1235 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1236 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1237 {
b162f9ea 1238 return o; /* As if inside SASSIGN */
7e363e51 1239 }
b162f9ea 1240
5dc0d613 1241 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1242
11343788 1243 switch (o->op_type) {
79072805
LW		 1244 case OP_FLOP:
1245 case OP_REPEAT:
11343788 1246 list(cBINOPo->op_first);
79072805
LW		 1247 break;
1248 case OP_OR:
1249 case OP_AND:
1250 case OP_COND_EXPR:
11343788 1251 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1252 list(kid);
1253 break;
1254 default:
1255 case OP_MATCH:
8782bef2 1256 case OP_QR:
79072805
LW		 1257 case OP_SUBST:
1258 case OP_NULL:
11343788 1259 if (!(o->op_flags & OPf_KIDS))
79072805 1260 break;
11343788
MB		 1261 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1262 list(cBINOPo->op_first);
1263 return gen_constant_list(o);
79072805
LW		 1264 }
1265 case OP_LIST:
11343788 1266 listkids(o);
79072805
LW		 1267 break;
1268 case OP_LEAVE:
1269 case OP_LEAVETRY:
5dc0d613 1270 kid = cLISTOPo->op_first;
54310121 1271 list(kid);
1272 while (kid = kid->op_sibling) {
1273 if (kid->op_sibling)
1274 scalarvoid(kid);
1275 else
1276 list(kid);
1277 }
3280af22 1278 WITH_THR(PL_curcop = &PL_compiling);
54310121 1279 break;
748a9306 1280 case OP_SCOPE:
79072805 1281 case OP_LINESEQ:
11343788 1282 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1283 if (kid->op_sibling)
1284 scalarvoid(kid);
1285 else
1286 list(kid);
1287 }
3280af22 1288 WITH_THR(PL_curcop = &PL_compiling);
79072805 1289 break;
c90c0ff4 1290 case OP_REQUIRE:
1291 /* all requires must return a boolean value */
5196be3e
MB		 1292 o->op_flags &= ~OPf_WANT;
1293 return scalar(o);
79072805 1294 }
11343788 1295 return o;
79072805
LW		 1296}
1297
1298OP *
864dbfa3 1299Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1300{
1301 OP *kid;
1302
11343788
MB		 1303 if (o) {
1304 if (o->op_type == OP_LINESEQ ||
1305 o->op_type == OP_SCOPE ||
1306 o->op_type == OP_LEAVE ||
1307 o->op_type == OP_LEAVETRY)
463ee0b2 1308 {
0f15f207 1309 dTHR;
11343788 1310 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1311 if (kid->op_sibling) {
463ee0b2 1312 scalarvoid(kid);
ed6116ce 1313 }
463ee0b2 1314 }
3280af22 1315 PL_curcop = &PL_compiling;
79072805 1316 }
11343788 1317 o->op_flags &= ~OPf_PARENS;
3280af22 1318 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1319 o->op_flags |= OPf_PARENS;
79072805 1320 }
8990e307 1321 else
11343788
MB		 1322 o = newOP(OP_STUB, 0);
1323 return o;
79072805
LW		 1324}
1325
76e3520e 1326STATIC OP *
cea2e8a9 1327S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1328{
1329 OP *kid;
11343788
MB		 1330 if (o && o->op_flags & OPf_KIDS) {
1331 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1332 mod(kid, type);
79072805 1333 }
11343788 1334 return o;
79072805
LW		 1335}
1336
79072805 1337OP *
864dbfa3 1338Perl_mod(pTHX_ OP *o, I32 type)
79072805 1339{
11343788 1340 dTHR;
79072805
LW		 1341 OP *kid;
1342 SV *sv;
2d8e6c8d 1343 STRLEN n_a;
79072805 1344
3280af22 1345 if (!o || PL_error_count)
11343788 1346 return o;
79072805 1347
b162f9ea 1348 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1349 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1350 {
b162f9ea 1351 return o;
7e363e51 1352 }
b162f9ea 1353
11343788 1354 switch (o->op_type) {
68dc0745 1355 case OP_UNDEF:
3280af22 1356 PL_modcount++;
5dc0d613 1357 return o;
a0d0e21e 1358 case OP_CONST:
11343788 1359 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1360 goto nomod;
3280af22 1361 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1362 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1363 PL_eval_start = 0;
a0d0e21e
LW		 1364 }
1365 else if (!type) {
3280af22
NIS		 1366 SAVEI32(PL_compiling.cop_arybase);
1367 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1368 }
1369 else if (type == OP_REFGEN)
1370 goto nomod;
1371 else
cea2e8a9 1372 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1373 break;
5f05dabc 1374 case OP_STUB:
5196be3e 1375 if (o->op_flags & OPf_PARENS)
5f05dabc 1376 break;
1377 goto nomod;
a0d0e21e
LW		 1378 case OP_ENTERSUB:
1379 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1380 !(o->op_flags & OPf_STACKED)) {
1381 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1382 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1383 assert(cUNOPo->op_first->op_type == OP_NULL);
1384 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1385 break;
1386 }
cd06dffe
GS		 1387 else { /* lvalue subroutine call */
1388 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1389 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1390 /* Backward compatibility mode: */
1391 o->op_private |= OPpENTERSUB_INARGS;
1392 break;
1393 }
1394 else { /* Compile-time error message: */
1395 OP *kid = cUNOPo->op_first;
1396 CV *cv;
1397 OP *okid;
1398
1399 if (kid->op_type == OP_PUSHMARK)
1400 goto skip_kids;
1401 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1402 Perl_croak(aTHX_
1403 "panic: unexpected lvalue entersub "
1404 "args: type/targ %ld:%ld",
1405 (long)kid->op_type,kid->op_targ);
1406 kid = kLISTOP->op_first;
1407 skip_kids:
1408 while (kid->op_sibling)
1409 kid = kid->op_sibling;
1410 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1411 /* Indirect call */
1412 if (kid->op_type == OP_METHOD_NAMED
1413 || kid->op_type == OP_METHOD)
1414 {
349fd7b7 1415 OP *newop;
cd06dffe
GS		 1416
1417 if (kid->op_sibling || kid->op_next != kid) {
1418 yyerror("panic: unexpected optree near method call");
1419 break;
1420 }
1421
349fd7b7
GS		 1422 NewOp(1101, newop, 1, OP);
1423 newop->op_type = OP_RV2CV;
1424 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
1425 newop->op_next = newop;
1426 kid->op_sibling = newop;
1427 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1428 break;
1429 }
1430
1431 if (kid->op_type != OP_RV2CV)
1432 Perl_croak(aTHX_
1433 "panic: unexpected lvalue entersub "
1434 "entry via type/targ %ld:%ld",
1435 (long)kid->op_type,kid->op_targ);
1436 kid->op_private |= OPpLVAL_INTRO;
1437 break; /* Postpone until runtime */
1438 }
1439
1440 okid = kid;
1441 kid = kUNOP->op_first;
1442 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1443 kid = kUNOP->op_first;
1444 if (kid->op_type == OP_NULL)
1445 Perl_croak(aTHX_
1446 "Unexpected constant lvalue entersub "
1447 "entry via type/targ %ld:%ld",
1448 (long)kid->op_type,kid->op_targ);
1449 if (kid->op_type != OP_GV) {
1450 /* Restore RV2CV to check lvalueness */
1451 restore_2cv:
1452 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1453 okid->op_next = kid->op_next;
1454 kid->op_next = okid;
1455 }
1456 else
1457 okid->op_next = Nullop;
1458 okid->op_type = OP_RV2CV;
1459 okid->op_targ = 0;
1460 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1461 okid->op_private |= OPpLVAL_INTRO;
1462 break;
1463 }
1464
638eceb6 1465 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1466 if (!cv)
1467 goto restore_2cv;
1468 if (CvLVALUE(cv))
1469 break;
1470 }
1471 }
79072805
LW		 1472 /* FALL THROUGH */
1473 default:
a0d0e21e
LW		 1474 nomod:
1475 /* grep, foreach, subcalls, refgen */
1476 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1477 break;
cea2e8a9 1478 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1479 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1480 ? "do block"
1481 : (o->op_type == OP_ENTERSUB
1482 ? "non-lvalue subroutine call"
1483 : PL_op_desc[o->op_type])),
22c35a8c 1484 type ? PL_op_desc[type] : "local"));
11343788 1485 return o;
79072805 1486
a0d0e21e
LW		 1487 case OP_PREINC:
1488 case OP_PREDEC:
1489 case OP_POW:
1490 case OP_MULTIPLY:
1491 case OP_DIVIDE:
1492 case OP_MODULO:
1493 case OP_REPEAT:
1494 case OP_ADD:
1495 case OP_SUBTRACT:
1496 case OP_CONCAT:
1497 case OP_LEFT_SHIFT:
1498 case OP_RIGHT_SHIFT:
1499 case OP_BIT_AND:
1500 case OP_BIT_XOR:
1501 case OP_BIT_OR:
1502 case OP_I_MULTIPLY:
1503 case OP_I_DIVIDE:
1504 case OP_I_MODULO:
1505 case OP_I_ADD:
1506 case OP_I_SUBTRACT:
11343788 1507 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1508 goto nomod;
3280af22 1509 PL_modcount++;
a0d0e21e
LW		 1510 break;
1511
79072805 1512 case OP_COND_EXPR:
11343788 1513 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1514 mod(kid, type);
79072805
LW		 1515 break;
1516
1517 case OP_RV2AV:
1518 case OP_RV2HV:
93af7a87 1519 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1520 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1521 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1522 PL_modcount = 10000;
11343788 1523 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1524 }
1525 /* FALL THROUGH */
79072805 1526 case OP_RV2GV:
5dc0d613 1527 if (scalar_mod_type(o, type))
3fe9a6f1 1528 goto nomod;
11343788 1529 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1530 /* FALL THROUGH */
1531 case OP_AASSIGN:
1532 case OP_ASLICE:
1533 case OP_HSLICE:
93a17b20
LW		 1534 case OP_NEXTSTATE:
1535 case OP_DBSTATE:
a0d0e21e
LW		 1536 case OP_REFGEN:
1537 case OP_CHOMP:
3280af22 1538 PL_modcount = 10000;
79072805 1539 break;
463ee0b2 1540 case OP_RV2SV:
11343788 1541 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1542 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1543 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1544 /* FALL THROUGH */
79072805 1545 case OP_GV:
463ee0b2 1546 case OP_AV2ARYLEN:
3280af22 1547 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1548 case OP_SASSIGN:
bf4b1e52
GS		 1549 case OP_ANDASSIGN:
1550 case OP_ORASSIGN:
8990e307 1551 case OP_AELEMFAST:
3280af22 1552 PL_modcount++;
8990e307
LW		 1553 break;
1554
748a9306
LW		 1555 case OP_PADAV:
1556 case OP_PADHV:
3280af22 1557 PL_modcount = 10000;
5196be3e
MB		 1558 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1559 return o; /* Treat \(@foo) like ordinary list. */
1560 if (scalar_mod_type(o, type))
3fe9a6f1 1561 goto nomod;
748a9306
LW		 1562 /* FALL THROUGH */
1563 case OP_PADSV:
3280af22 1564 PL_modcount++;
748a9306 1565 if (!type)
cea2e8a9 1566 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1567 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1568 break;
1569
554b3eca 1570#ifdef USE_THREADS
2faa37cc 1571 case OP_THREADSV:
533c011a 1572 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1573 break;
1574#endif /* USE_THREADS */
1575
748a9306
LW		 1576 case OP_PUSHMARK:
1577 break;
a0d0e21e 1578
69969c6f
SB		 1579 case OP_KEYS:
1580 if (type != OP_SASSIGN)
1581 goto nomod;
5d82c453
GA		 1582 goto lvalue_func;
1583 case OP_SUBSTR:
1584 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1585 goto nomod;
5f05dabc 1586 /* FALL THROUGH */
a0d0e21e 1587 case OP_POS:
463ee0b2 1588 case OP_VEC:
5d82c453 1589 lvalue_func:
11343788
MB		 1590 pad_free(o->op_targ);
1591 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1592 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1593 if (o->op_flags & OPf_KIDS)
1594 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1595 break;
a0d0e21e 1596
463ee0b2
LW		 1597 case OP_AELEM:
1598 case OP_HELEM:
11343788 1599 ref(cBINOPo->op_first, o->op_type);
68dc0745 1600 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1601 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1602 o->op_private |= OPpLVAL_DEFER;
3280af22 1603 PL_modcount++;
463ee0b2
LW		 1604 break;
1605
1606 case OP_SCOPE:
1607 case OP_LEAVE:
1608 case OP_ENTER:
11343788
MB		 1609 if (o->op_flags & OPf_KIDS)
1610 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1611 break;
1612
1613 case OP_NULL:
638bc118
GS		 1614 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1615 goto nomod;
1616 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1617 break;
11343788
MB		 1618 if (o->op_targ != OP_LIST) {
1619 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1620 break;
1621 }
1622 /* FALL THROUGH */
463ee0b2 1623 case OP_LIST:
11343788 1624 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1625 mod(kid, type);
1626 break;
1627 }
11343788 1628 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1629
1630 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1631 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1632 else if (!type) {
11343788
MB		 1633 o->op_private |= OPpLVAL_INTRO;
1634 o->op_flags &= ~OPf_SPECIAL;
3280af22 1635 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1636 }
a0d0e21e 1637 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1638 o->op_flags |= OPf_REF;
1639 return o;
463ee0b2
LW		 1640}
1641
864dbfa3 1642STATIC bool
cea2e8a9 1643S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1644{
1645 switch (type) {
1646 case OP_SASSIGN:
5196be3e 1647 if (o->op_type == OP_RV2GV)
3fe9a6f1 1648 return FALSE;
1649 /* FALL THROUGH */
1650 case OP_PREINC:
1651 case OP_PREDEC:
1652 case OP_POSTINC:
1653 case OP_POSTDEC:
1654 case OP_I_PREINC:
1655 case OP_I_PREDEC:
1656 case OP_I_POSTINC:
1657 case OP_I_POSTDEC:
1658 case OP_POW:
1659 case OP_MULTIPLY:
1660 case OP_DIVIDE:
1661 case OP_MODULO:
1662 case OP_REPEAT:
1663 case OP_ADD:
1664 case OP_SUBTRACT:
1665 case OP_I_MULTIPLY:
1666 case OP_I_DIVIDE:
1667 case OP_I_MODULO:
1668 case OP_I_ADD:
1669 case OP_I_SUBTRACT:
1670 case OP_LEFT_SHIFT:
1671 case OP_RIGHT_SHIFT:
1672 case OP_BIT_AND:
1673 case OP_BIT_XOR:
1674 case OP_BIT_OR:
1675 case OP_CONCAT:
1676 case OP_SUBST:
1677 case OP_TRANS:
49e9fbe6
GS		 1678 case OP_READ:
1679 case OP_SYSREAD:
1680 case OP_RECV:
bf4b1e52
GS		 1681 case OP_ANDASSIGN:
1682 case OP_ORASSIGN:
3fe9a6f1 1683 return TRUE;
1684 default:
1685 return FALSE;
1686 }
1687}
1688
35cd451c 1689STATIC bool
cea2e8a9 1690S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1691{
1692 switch (o->op_type) {
1693 case OP_PIPE_OP:
1694 case OP_SOCKPAIR:
1695 if (argnum == 2)
1696 return TRUE;
1697 /* FALL THROUGH */
1698 case OP_SYSOPEN:
1699 case OP_OPEN:
ded8aa31 1700 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1701 case OP_SOCKET:
1702 case OP_OPEN_DIR:
1703 case OP_ACCEPT:
1704 if (argnum == 1)
1705 return TRUE;
1706 /* FALL THROUGH */
1707 default:
1708 return FALSE;
1709 }
1710}
1711
463ee0b2 1712OP *
864dbfa3 1713Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1714{
1715 OP *kid;
11343788
MB		 1716 if (o && o->op_flags & OPf_KIDS) {
1717 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1718 ref(kid, type);
1719 }
11343788 1720 return o;
463ee0b2
LW		 1721}
1722
1723OP *
864dbfa3 1724Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1725{
1726 OP *kid;
463ee0b2 1727
3280af22 1728 if (!o || PL_error_count)
11343788 1729 return o;
463ee0b2 1730
11343788 1731 switch (o->op_type) {
a0d0e21e 1732 case OP_ENTERSUB:
afebc493 1733 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1734 !(o->op_flags & OPf_STACKED)) {
1735 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1736 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1737 assert(cUNOPo->op_first->op_type == OP_NULL);
1738 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1739 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1740 }
1741 break;
aeea060c 1742
463ee0b2 1743 case OP_COND_EXPR:
11343788 1744 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1745 ref(kid, type);
1746 break;
8990e307 1747 case OP_RV2SV:
35cd451c
GS		 1748 if (type == OP_DEFINED)
1749 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1750 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1751 /* FALL THROUGH */
1752 case OP_PADSV:
5f05dabc 1753 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1754 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1755 : type == OP_RV2HV ? OPpDEREF_HV
1756 : OPpDEREF_SV);
11343788 1757 o->op_flags |= OPf_MOD;
a0d0e21e 1758 }
8990e307
LW		 1759 break;
1760
2faa37cc 1761 case OP_THREADSV:
a863c7d1
MB		 1762 o->op_flags |= OPf_MOD; /* XXX ??? */
1763 break;
1764
463ee0b2
LW		 1765 case OP_RV2AV:
1766 case OP_RV2HV:
aeea060c 1767 o->op_flags |= OPf_REF;
8990e307 1768 /* FALL THROUGH */
463ee0b2 1769 case OP_RV2GV:
35cd451c
GS		 1770 if (type == OP_DEFINED)
1771 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1772 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1773 break;
8990e307 1774
463ee0b2
LW		 1775 case OP_PADAV:
1776 case OP_PADHV:
aeea060c 1777 o->op_flags |= OPf_REF;
79072805 1778 break;
aeea060c 1779
8990e307 1780 case OP_SCALAR:
79072805 1781 case OP_NULL:
11343788 1782 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1783 break;
11343788 1784 ref(cBINOPo->op_first, type);
79072805
LW		 1785 break;
1786 case OP_AELEM:
1787 case OP_HELEM:
11343788 1788 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1789 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1790 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1791 : type == OP_RV2HV ? OPpDEREF_HV
1792 : OPpDEREF_SV);
11343788 1793 o->op_flags |= OPf_MOD;
8990e307 1794 }
79072805
LW		 1795 break;
1796
463ee0b2 1797 case OP_SCOPE:
79072805
LW		 1798 case OP_LEAVE:
1799 case OP_ENTER:
8990e307 1800 case OP_LIST:
11343788 1801 if (!(o->op_flags & OPf_KIDS))
79072805 1802 break;
11343788 1803 ref(cLISTOPo->op_last, type);
79072805 1804 break;
a0d0e21e
LW		 1805 default:
1806 break;
79072805 1807 }
11343788 1808 return scalar(o);
8990e307 1809
79072805
LW		 1810}
1811
09bef843
SB		 1812STATIC OP *
1813S_dup_attrlist(pTHX_ OP *o)
1814{
1815 OP *rop = Nullop;
1816
1817 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1818 * where the first kid is OP_PUSHMARK and the remaining ones
1819 * are OP_CONST. We need to push the OP_CONST values.
1820 */
1821 if (o->op_type == OP_CONST)
1822 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1823 else {
1824 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1825 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1826 if (o->op_type == OP_CONST)
1827 rop = append_elem(OP_LIST, rop,
1828 newSVOP(OP_CONST, o->op_flags,
1829 SvREFCNT_inc(cSVOPo->op_sv)));
1830 }
1831 }
1832 return rop;
1833}
1834
1835STATIC void
1836S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1837{
1838 OP *modname; /* for 'use' */
1839 SV *stashsv;
1840
1841 /* fake up C<use attributes $pkg,$rv,@attrs> */
1842 ENTER; /* need to protect against side-effects of 'use' */
1843 SAVEINT(PL_expect);
1844 if (stash && HvNAME(stash))
1845 stashsv = newSVpv(HvNAME(stash), 0);
1846 else
1847 stashsv = &PL_sv_no;
1848#define ATTRSMODULE "attributes"
1849 modname = newSVOP(OP_CONST, 0,
1850 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1851 modname->op_private |= OPpCONST_BARE;
1852 /* that flag is required to make 'use' work right */
1853 utilize(1, start_subparse(FALSE, 0),
1854 Nullop, /* version */
1855 modname,
1856 prepend_elem(OP_LIST,
1857 newSVOP(OP_CONST, 0, stashsv),
1858 prepend_elem(OP_LIST,
1859 newSVOP(OP_CONST, 0, newRV(target)),
1860 dup_attrlist(attrs))));
1861 LEAVE;
1862}
1863
1864STATIC OP *
1865S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1866{
1867 OP *kid;
93a17b20
LW		 1868 I32 type;
1869
3280af22 1870 if (!o || PL_error_count)
11343788 1871 return o;
93a17b20 1872
11343788 1873 type = o->op_type;
93a17b20 1874 if (type == OP_LIST) {
11343788 1875 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1876 my_kid(kid, attrs);
dab48698 1877 } else if (type == OP_UNDEF) {
7766148a 1878 return o;
77ca0c92
LW		 1879 } else if (type == OP_RV2SV || /* "our" declaration */
1880 type == OP_RV2AV ||
1881 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1882 o->op_private |= OPpOUR_INTRO;
77ca0c92 1883 return o;
dab48698 1884 } else if (type != OP_PADSV &&
93a17b20
LW		 1885 type != OP_PADAV &&
1886 type != OP_PADHV &&
1887 type != OP_PUSHMARK)
1888 {
eb64745e
GS		 1889 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1890 PL_op_desc[o->op_type],
1891 PL_in_my == KEY_our ? "our" : "my"));
11343788 1892 return o;
93a17b20 1893 }
09bef843
SB		 1894 else if (attrs && type != OP_PUSHMARK) {
1895 HV *stash;
1896 SV *padsv;
1897 SV **namesvp;
1898
eb64745e
GS		 1899 PL_in_my = FALSE;
1900 PL_in_my_stash = Nullhv;
1901
09bef843
SB		 1902 /* check for C<my Dog $spot> when deciding package */
1903 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1904 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1905 stash = SvSTASH(*namesvp);
1906 else
1907 stash = PL_curstash;
1908 padsv = PAD_SV(o->op_targ);
1909 apply_attrs(stash, padsv, attrs);
1910 }
11343788
MB		 1911 o->op_flags |= OPf_MOD;
1912 o->op_private |= OPpLVAL_INTRO;
1913 return o;
93a17b20
LW		 1914}
1915
1916OP *
09bef843
SB		 1917Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1918{
1919 if (o->op_flags & OPf_PARENS)
1920 list(o);
09bef843
SB		 1921 if (attrs)
1922 SAVEFREEOP(attrs);
eb64745e
GS		 1923 o = my_kid(o, attrs);
1924 PL_in_my = FALSE;
1925 PL_in_my_stash = Nullhv;
1926 return o;
09bef843
SB		 1927}
1928
1929OP *
1930Perl_my(pTHX_ OP *o)
1931{
1932 return my_kid(o, Nullop);
1933}
1934
1935OP *
864dbfa3 1936Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1937{
1938 if (o)
1939 o->op_flags |= OPf_PARENS;
1940 return o;
1941}
1942
1943OP *
864dbfa3 1944Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1945{
d008e5eb 1946 dTHR;
11343788 1947 OP *o;
79072805 1948
599cee73
PM		 1949 if (ckWARN(WARN_UNSAFE) &&
1950 (left->op_type == OP_RV2AV ||
1951 left->op_type == OP_RV2HV ||
1952 left->op_type == OP_PADAV ||
1953 left->op_type == OP_PADHV)) {
22c35a8c 1954 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1955 right->op_type == OP_TRANS)
1956 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1957 const char *sample = ((left->op_type == OP_RV2AV ||
1958 left->op_type == OP_PADAV)
1959 ? "@array" : "%hash");
cea2e8a9 1960 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1961 "Applying %s to %s will act on scalar(%s)",
1962 desc, sample, sample);
2ae324a7 1963 }
1964
79072805
LW		 1965 if (right->op_type == OP_MATCH ||
1966 right->op_type == OP_SUBST ||
1967 right->op_type == OP_TRANS) {
1968 right->op_flags |= OPf_STACKED;
1969 if (right->op_type != OP_MATCH)
463ee0b2 1970 left = mod(left, right->op_type);
79072805 1971 if (right->op_type == OP_TRANS)
11343788 1972 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1973 else
11343788 1974 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1975 if (type == OP_NOT)
11343788
MB		 1976 return newUNOP(OP_NOT, 0, scalar(o));
1977 return o;
79072805
LW		 1978 }
1979 else
1980 return bind_match(type, left,
1981 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1982}
1983
1984OP *
864dbfa3 1985Perl_invert(pTHX_ OP *o)
79072805 1986{
11343788
MB		 1987 if (!o)
1988 return o;
79072805 1989 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1990 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1991}
1992
1993OP *
864dbfa3 1994Perl_scope(pTHX_ OP *o)
79072805
LW		 1995{
1996 if (o) {
3280af22 1997 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1998 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1999 o->op_type = OP_LEAVE;
22c35a8c 2000 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2001 }
2002 else {
2003 if (o->op_type == OP_LINESEQ) {
2004 OP *kid;
2005 o->op_type = OP_SCOPE;
22c35a8c 2006 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2007 kid = ((LISTOP*)o)->op_first;
2008 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
2009 null(kid);
463ee0b2
LW		 2010 }
2011 else
748a9306 2012 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2013 }
79072805
LW		 2014 }
2015 return o;
2016}
2017
b3ac6de7 2018void
864dbfa3 2019Perl_save_hints(pTHX)
b3ac6de7 2020{
3280af22
NIS		 2021 SAVEI32(PL_hints);
2022 SAVESPTR(GvHV(PL_hintgv));
2023 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2024 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2025}
2026
a0d0e21e 2027int
864dbfa3 2028Perl_block_start(pTHX_ int full)
79072805 2029{
11343788 2030 dTHR;
3280af22 2031 int retval = PL_savestack_ix;
b3ac6de7 2032
3280af22 2033 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2034 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2035 if (full)
2036 PL_comppad_name_fill = PL_comppad_name_floor;
2037 if (PL_comppad_name_floor < 0)
2038 PL_comppad_name_floor = 0;
3280af22
NIS		 2039 SAVEI32(PL_min_intro_pending);
2040 SAVEI32(PL_max_intro_pending);
2041 PL_min_intro_pending = 0;
2042 SAVEI32(PL_comppad_name_fill);
2043 SAVEI32(PL_padix_floor);
2044 PL_padix_floor = PL_padix;
2045 PL_pad_reset_pending = FALSE;
b3ac6de7 2046 SAVEHINTS();
3280af22 2047 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2048 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2049 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2050 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2051 SAVEFREESV(PL_compiling.cop_warnings) ;
2052 }
a0d0e21e
LW		 2053 return retval;
2054}
2055
2056OP*
864dbfa3 2057Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2058{
11343788 2059 dTHR;
3280af22 2060 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2061 OP* retval = scalarseq(seq);
a0d0e21e 2062 LEAVE_SCOPE(floor);
3280af22 2063 PL_pad_reset_pending = FALSE;
e24b16f9 2064 PL_compiling.op_private = PL_hints;
a0d0e21e 2065 if (needblockscope)
3280af22
NIS		 2066 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2067 pad_leavemy(PL_comppad_name_fill);
2068 PL_cop_seqmax++;
a0d0e21e
LW		 2069 return retval;
2070}
2071
76e3520e 2072STATIC OP *
cea2e8a9 2073S_newDEFSVOP(pTHX)
54b9620d
MB		 2074{
2075#ifdef USE_THREADS
2076 OP *o = newOP(OP_THREADSV, 0);
2077 o->op_targ = find_threadsv("_");
2078 return o;
2079#else
3280af22 2080 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2081#endif /* USE_THREADS */
2082}
2083
a0d0e21e 2084void
864dbfa3 2085Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2086{
11343788 2087 dTHR;
3280af22 2088 if (PL_in_eval) {
b295d113
TH		 2089 if (PL_eval_root)
2090 return;
faef0170
HS		 2091 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2092 ((PL_in_eval & EVAL_KEEPERR)
2093 ? OPf_SPECIAL : 0), o);
3280af22 2094 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2095 PL_eval_root->op_private |= OPpREFCOUNTED;
2096 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2097 PL_eval_root->op_next = 0;
2098 peep(PL_eval_start);
a0d0e21e
LW		 2099 }
2100 else {
5dc0d613 2101 if (!o)
a0d0e21e 2102 return;
3280af22
NIS		 2103 PL_main_root = scope(sawparens(scalarvoid(o)));
2104 PL_curcop = &PL_compiling;
2105 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2106 PL_main_root->op_private |= OPpREFCOUNTED;
2107 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2108 PL_main_root->op_next = 0;
2109 peep(PL_main_start);
2110 PL_compcv = 0;
3841441e 2111
4fdae800 2112 /* Register with debugger */
84902520 2113 if (PERLDB_INTER) {
864dbfa3 2114 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2115 if (cv) {
2116 dSP;
924508f0 2117 PUSHMARK(SP);
cc49e20b 2118 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2119 PUTBACK;
864dbfa3 2120 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2121 }
2122 }
79072805 2123 }
79072805
LW		 2124}
2125
2126OP *
864dbfa3 2127Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2128{
2129 if (o->op_flags & OPf_PARENS)
2130 list(o);
8990e307 2131 else {
d008e5eb 2132 dTHR;
599cee73 2133 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2134 char *s;
834a4ddd 2135 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2136 if (*s == ';' || *s == '=')
eb64745e
GS		 2137 Perl_warner(aTHX_ WARN_PARENTHESIS,
2138 "Parentheses missing around \"%s\" list",
2139 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2140 }
2141 }
93a17b20 2142 if (lex)
eb64745e 2143 o = my(o);
93a17b20 2144 else
eb64745e
GS		 2145 o = mod(o, OP_NULL); /* a bit kludgey */
2146 PL_in_my = FALSE;
2147 PL_in_my_stash = Nullhv;
2148 return o;
79072805
LW		 2149}
2150
2151OP *
864dbfa3 2152Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2153{
2154 if (o->op_type == OP_LIST) {
554b3eca
MB		 2155 OP *o2;
2156#ifdef USE_THREADS
2faa37cc 2157 o2 = newOP(OP_THREADSV, 0);
54b9620d 2158 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2159#else
2160 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2161#endif /* USE_THREADS */
2162 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2163 }
2164 return o;
2165}
2166
2167OP *
864dbfa3 2168Perl_fold_constants(pTHX_ register OP *o)
79072805 2169{
11343788 2170 dTHR;
79072805
LW		 2171 register OP *curop;
2172 I32 type = o->op_type;
748a9306 2173 SV *sv;
79072805 2174
22c35a8c 2175 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2176 scalar(o);
b162f9ea 2177 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2178 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2179
eac055e9
GS		 2180 /* integerize op, unless it happens to be C<-foo>.
2181 * XXX should pp_i_negate() do magic string negation instead? */
2182 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2183 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2184 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2185 {
22c35a8c 2186 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2187 }
85e6fe83 2188
22c35a8c 2189 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2190 goto nope;
2191
de939608 2192 switch (type) {
7a52d87a
GS		 2193 case OP_NEGATE:
2194 /* XXX might want a ck_negate() for this */
2195 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2196 break;
de939608
CS		 2197 case OP_SPRINTF:
2198 case OP_UCFIRST:
2199 case OP_LCFIRST:
2200 case OP_UC:
2201 case OP_LC:
69dcf70c
MB		 2202 case OP_SLT:
2203 case OP_SGT:
2204 case OP_SLE:
2205 case OP_SGE:
2206 case OP_SCMP:
2207
de939608
CS		 2208 if (o->op_private & OPpLOCALE)
2209 goto nope;
2210 }
2211
3280af22 2212 if (PL_error_count)
a0d0e21e
LW		 2213 goto nope; /* Don't try to run w/ errors */
2214
79072805 2215 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2216 if ((curop->op_type != OP_CONST ||
2217 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2218 curop->op_type != OP_LIST &&
2219 curop->op_type != OP_SCALAR &&
2220 curop->op_type != OP_NULL &&
2221 curop->op_type != OP_PUSHMARK)
2222 {
79072805
LW		 2223 goto nope;
2224 }
2225 }
2226
2227 curop = LINKLIST(o);
2228 o->op_next = 0;
533c011a 2229 PL_op = curop;
cea2e8a9 2230 CALLRUNOPS(aTHX);
3280af22 2231 sv = *(PL_stack_sp--);
748a9306 2232 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2233 pad_swipe(o->op_targ);
748a9306
LW		 2234 else if (SvTEMP(sv)) { /* grab mortal temp? */
2235 (void)SvREFCNT_inc(sv);
2236 SvTEMP_off(sv);
85e6fe83 2237 }
79072805
LW		 2238 op_free(o);
2239 if (type == OP_RV2GV)
b1cb66bf 2240 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2241 else {
ee580363
GS		 2242 /* try to smush double to int, but don't smush -2.0 to -2 */
2243 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2244 type != OP_NEGATE)
2245 {
748a9306 2246 IV iv = SvIV(sv);
65202027 2247 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2248 SvREFCNT_dec(sv);
2249 sv = newSViv(iv);
2250 }
b1cb66bf 2251 else
2252 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2253 }
2254 return newSVOP(OP_CONST, 0, sv);
2255 }
aeea060c 2256
79072805 2257 nope:
22c35a8c 2258 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2259 return o;
79072805 2260
3280af22 2261 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2262 if (type == OP_MODULO
2263 || type == OP_DIVIDE
2264 || !(o->op_flags & OPf_KIDS))
2265 {
85e6fe83 2266 return o;
4bb9f687 2267 }
85e6fe83
LW		 2268
2269 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2270 if (curop->op_type == OP_CONST) {
b1cb66bf 2271 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2272 continue;
2273 return o;
2274 }
22c35a8c 2275 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2276 continue;
2277 return o;
2278 }
22c35a8c 2279 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2280 }
2281
79072805
LW		 2282 return o;
2283}
2284
2285OP *
864dbfa3 2286Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2287{
11343788 2288 dTHR;
79072805 2289 register OP *curop;
3280af22 2290 I32 oldtmps_floor = PL_tmps_floor;
79072805 2291
a0d0e21e 2292 list(o);
3280af22 2293 if (PL_error_count)
a0d0e21e
LW		 2294 return o; /* Don't attempt to run with errors */
2295
533c011a 2296 PL_op = curop = LINKLIST(o);
a0d0e21e 2297 o->op_next = 0;
7d4045d4 2298 peep(curop);
cea2e8a9
GS		 2299 pp_pushmark();
2300 CALLRUNOPS(aTHX);
533c011a 2301 PL_op = curop;
cea2e8a9 2302 pp_anonlist();
3280af22 2303 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2304
2305 o->op_type = OP_RV2AV;
22c35a8c 2306 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2307 curop = ((UNOP*)o)->op_first;
3280af22 2308 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2309 op_free(curop);
79072805
LW		 2310 linklist(o);
2311 return list(o);
2312}
2313
2314OP *
864dbfa3 2315Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2316{
2317 OP *kid;
a0d0e21e 2318 OP *last = 0;
79072805 2319
11343788
MB		 2320 if (!o || o->op_type != OP_LIST)
2321 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2322 else
5dc0d613 2323 o->op_flags &= ~OPf_WANT;
79072805 2324
22c35a8c 2325 if (!(PL_opargs[type] & OA_MARK))
11343788 2326 null(cLISTOPo->op_first);
8990e307 2327
11343788 2328 o->op_type = type;
22c35a8c 2329 o->op_ppaddr = PL_ppaddr[type];
11343788 2330 o->op_flags |= flags;
79072805 2331
11343788
MB		 2332 o = CHECKOP(type, o);
2333 if (o->op_type != type)
2334 return o;
79072805 2335
11343788 2336 if (cLISTOPo->op_children < 7) {
79072805 2337 /* XXX do we really need to do this if we're done appending?? */
11343788 2338 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2339 last = kid;
11343788 2340 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2341 }
2342
11343788 2343 return fold_constants(o);
79072805
LW		 2344}
2345
2346/* List constructors */
2347
2348OP *
864dbfa3 2349Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2350{
2351 if (!first)
2352 return last;
8990e307
LW		 2353
2354 if (!last)
79072805 2355 return first;
8990e307 2356
a0d0e21e
LW		 2357 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2358 return newLISTOP(type, 0, first, last);
79072805 2359
a0d0e21e
LW		 2360 if (first->op_flags & OPf_KIDS)
2361 ((LISTOP*)first)->op_last->op_sibling = last;
2362 else {
2363 first->op_flags |= OPf_KIDS;
2364 ((LISTOP*)first)->op_first = last;
2365 }
2366 ((LISTOP*)first)->op_last = last;
2367 ((LISTOP*)first)->op_children++;
2368 return first;
79072805
LW		 2369}
2370
2371OP *
864dbfa3 2372Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2373{
2374 if (!first)
2375 return (OP*)last;
8990e307
LW		 2376
2377 if (!last)
79072805 2378 return (OP*)first;
8990e307
LW		 2379
2380 if (first->op_type != type)
79072805 2381 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2382
2383 if (last->op_type != type)
79072805
LW		 2384 return append_elem(type, (OP*)first, (OP*)last);
2385
2386 first->op_last->op_sibling = last->op_first;
2387 first->op_last = last->op_last;
2388 first->op_children += last->op_children;
2389 if (first->op_children)
acb74605 2390 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2391
2392#ifdef PL_OP_SLAB_ALLOC
2393#else
2394 Safefree(last);
2395#endif
79072805
LW		 2396 return (OP*)first;
2397}
2398
2399OP *
864dbfa3 2400Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2401{
2402 if (!first)
2403 return last;
8990e307
LW		 2404
2405 if (!last)
79072805 2406 return first;
8990e307
LW		 2407
2408 if (last->op_type == type) {
2409 if (type == OP_LIST) { /* already a PUSHMARK there */
2410 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2411 ((LISTOP*)last)->op_first->op_sibling = first;
2412 }
2413 else {
2414 if (!(last->op_flags & OPf_KIDS)) {
2415 ((LISTOP*)last)->op_last = first;
2416 last->op_flags |= OPf_KIDS;
2417 }
2418 first->op_sibling = ((LISTOP*)last)->op_first;
2419 ((LISTOP*)last)->op_first = first;
79072805 2420 }
79072805
LW		 2421 ((LISTOP*)last)->op_children++;
2422 return last;
2423 }
2424
2425 return newLISTOP(type, 0, first, last);
2426}
2427
2428/* Constructors */
2429
2430OP *
864dbfa3 2431Perl_newNULLLIST(pTHX)
79072805 2432{
8990e307
LW		 2433 return newOP(OP_STUB, 0);
2434}
2435
2436OP *
864dbfa3 2437Perl_force_list(pTHX_ OP *o)
8990e307 2438{
11343788
MB		 2439 if (!o || o->op_type != OP_LIST)
2440 o = newLISTOP(OP_LIST, 0, o, Nullop);
2441 null(o);
2442 return o;
79072805
LW		 2443}
2444
2445OP *
864dbfa3 2446Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2447{
2448 LISTOP *listop;
2449
b7dc083c 2450 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2451
2452 listop->op_type = type;
22c35a8c 2453 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2454 listop->op_children = (first != 0) + (last != 0);
2455 listop->op_flags = flags;
79072805
LW		 2456
2457 if (!last && first)
2458 last = first;
2459 else if (!first && last)
2460 first = last;
8990e307
LW		 2461 else if (first)
2462 first->op_sibling = last;
79072805
LW		 2463 listop->op_first = first;
2464 listop->op_last = last;
8990e307
LW		 2465 if (type == OP_LIST) {
2466 OP* pushop;
2467 pushop = newOP(OP_PUSHMARK, 0);
2468 pushop->op_sibling = first;
2469 listop->op_first = pushop;
2470 listop->op_flags |= OPf_KIDS;
2471 if (!last)
2472 listop->op_last = pushop;
2473 }
2474 else if (listop->op_children)
2475 listop->op_flags |= OPf_KIDS;
79072805
LW		 2476
2477 return (OP*)listop;
2478}
2479
2480OP *
864dbfa3 2481Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2482{
11343788 2483 OP *o;
b7dc083c 2484 NewOp(1101, o, 1, OP);
11343788 2485 o->op_type = type;
22c35a8c 2486 o->op_ppaddr = PL_ppaddr[type];
11343788 2487 o->op_flags = flags;
79072805 2488
11343788
MB		 2489 o->op_next = o;
2490 o->op_private = 0 + (flags >> 8);
22c35a8c 2491 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2492 scalar(o);
22c35a8c 2493 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2494 o->op_targ = pad_alloc(type, SVs_PADTMP);
2495 return CHECKOP(type, o);
79072805
LW		 2496}
2497
2498OP *
864dbfa3 2499Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2500{
2501 UNOP *unop;
2502
93a17b20 2503 if (!first)
aeea060c 2504 first = newOP(OP_STUB, 0);
22c35a8c 2505 if (PL_opargs[type] & OA_MARK)
8990e307 2506 first = force_list(first);
93a17b20 2507
b7dc083c 2508 NewOp(1101, unop, 1, UNOP);
79072805 2509 unop->op_type = type;
22c35a8c 2510 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2511 unop->op_first = first;
2512 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2513 unop->op_private = 1 | (flags >> 8);
e50aee73 2514 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2515 if (unop->op_next)
2516 return (OP*)unop;
2517
a0d0e21e 2518 return fold_constants((OP *) unop);
79072805
LW		 2519}
2520
2521OP *
864dbfa3 2522Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2523{
2524 BINOP *binop;
b7dc083c 2525 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2526
2527 if (!first)
2528 first = newOP(OP_NULL, 0);
2529
2530 binop->op_type = type;
22c35a8c 2531 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2532 binop->op_first = first;
2533 binop->op_flags = flags | OPf_KIDS;
2534 if (!last) {
2535 last = first;
c07a80fd 2536 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2537 }
2538 else {
c07a80fd 2539 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2540 first->op_sibling = last;
2541 }
2542
e50aee73 2543 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2544 if (binop->op_next || binop->op_type != type)
79072805
LW		 2545 return (OP*)binop;
2546
7284ab6f 2547 binop->op_last = binop->op_first->op_sibling;
79072805 2548
a0d0e21e 2549 return fold_constants((OP *)binop);
79072805
LW		 2550}
2551
a0ed51b3
LW		 2552static int
2553utf8compare(const void *a, const void *b)
2554{
2555 int i;
2556 for (i = 0; i < 10; i++) {
2557 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2558 return -1;
2559 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2560 return 1;
2561 }
2562 return 0;
2563}
2564
79072805 2565OP *
864dbfa3 2566Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2567{
79072805
LW		 2568 SV *tstr = ((SVOP*)expr)->op_sv;
2569 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2570 STRLEN tlen;
2571 STRLEN rlen;
ec49126f 2572 register U8 *t = (U8*)SvPV(tstr, tlen);
2573 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2574 register I32 i;
2575 register I32 j;
a0ed51b3 2576 I32 del;
79072805 2577 I32 complement;
5d06d08e 2578 I32 squash;
79072805
LW		 2579 register short *tbl;
2580
11343788 2581 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2582 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2583 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2584
a0ed51b3 2585 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2586 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2587 SV* transv = 0;
2588 U8* tend = t + tlen;
2589 U8* rend = r + rlen;
2590 I32 ulen;
2591 U32 tfirst = 1;
2592 U32 tlast = 0;
2593 I32 tdiff;
2594 U32 rfirst = 1;
2595 U32 rlast = 0;
2596 I32 rdiff;
2597 I32 diff;
2598 I32 none = 0;
2599 U32 max = 0;
2600 I32 bits;
2601 I32 grows = 0;
2602 I32 havefinal = 0;
2603 U32 final;
2604 HV *hv;
2605 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2606 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2607
2608 if (complement) {
2609 U8 tmpbuf[10];
2610 U8** cp;
2611 UV nextmin = 0;
2612 New(1109, cp, tlen, U8*);
2613 i = 0;
79cb57f6 2614 transv = newSVpvn("",0);
a0ed51b3
LW		 2615 while (t < tend) {
2616 cp[i++] = t;
2617 t += UTF8SKIP(t);
2618 if (*t == 0xff) {
2619 t++;
2620 t += UTF8SKIP(t);
2621 }
2622 }
2623 qsort(cp, i, sizeof(U8*), utf8compare);
2624 for (j = 0; j < i; j++) {
2625 U8 *s = cp[j];
2626 UV val = utf8_to_uv(s, &ulen);
2627 s += ulen;
2628 diff = val - nextmin;
2629 if (diff > 0) {
2630 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2631 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2632 if (diff > 1) {
2633 t = uv_to_utf8(tmpbuf, val - 1);
2634 sv_catpvn(transv, "\377", 1);
dfe13c55 2635 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2636 }
2637 }
2638 if (*s == 0xff)
2639 val = utf8_to_uv(s+1, &ulen);
2640 if (val >= nextmin)
2641 nextmin = val + 1;
2642 }
2643 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2644 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2645 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2646 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2647 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2648 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2649 tlen = SvCUR(transv);
2650 tend = t + tlen;
2651 }
2652 else if (!rlen && !del) {
2653 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2654 }
2655 if (!squash) {
2656 if (to_utf && from_utf) { /* only counting characters */
2657 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2658 o->op_private |= OPpTRANS_IDENTICAL;
2659 }
2660 else { /* straight latin-1 translation */
2661 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2662 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2663 o->op_private |= OPpTRANS_IDENTICAL;
2664 }
a0ed51b3
LW		 2665 }
2666
2667 while (t < tend || tfirst <= tlast) {
2668 /* see if we need more "t" chars */
2669 if (tfirst > tlast) {
2670 tfirst = (I32)utf8_to_uv(t, &ulen);
2671 t += ulen;
2672 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2673 tlast = (I32)utf8_to_uv(++t, &ulen);
2674 t += ulen;
2675 }
2676 else
2677 tlast = tfirst;
2678 }
2679
2680 /* now see if we need more "r" chars */
2681 if (rfirst > rlast) {
2682 if (r < rend) {
2683 rfirst = (I32)utf8_to_uv(r, &ulen);
2684 r += ulen;
2685 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2686 rlast = (I32)utf8_to_uv(++r, &ulen);
2687 r += ulen;
2688 }
2689 else
2690 rlast = rfirst;
2691 }
2692 else {
2693 if (!havefinal++)
2694 final = rlast;
2695 rfirst = rlast = 0xffffffff;
2696 }
2697 }
2698
2699 /* now see which range will peter our first, if either. */
2700 tdiff = tlast - tfirst;
2701 rdiff = rlast - rfirst;
2702
2703 if (tdiff <= rdiff)
2704 diff = tdiff;
2705 else
2706 diff = rdiff;
2707
2708 if (rfirst == 0xffffffff) {
2709 diff = tdiff; /* oops, pretend rdiff is infinite */
2710 if (diff > 0)
894356b3
GS		 2711 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2712 (long)tfirst, (long)tlast);
a0ed51b3 2713 else
894356b3 2714 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2715 }
2716 else {
2717 if (diff > 0)
894356b3
GS		 2718 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2719 (long)tfirst, (long)(tfirst + diff),
2720 (long)rfirst);
a0ed51b3 2721 else
894356b3
GS		 2722 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2723 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2724
2725 if (rfirst + diff > max)
2726 max = rfirst + diff;
2727 rfirst += diff + 1;
2728 if (!grows) {
2729 if (rfirst <= 0x80)
2730 ;
2731 else if (rfirst <= 0x800)
2732 grows |= (tfirst < 0x80);
2733 else if (rfirst <= 0x10000)
2734 grows |= (tfirst < 0x800);
2735 else if (rfirst <= 0x200000)
2736 grows |= (tfirst < 0x10000);
2737 else if (rfirst <= 0x4000000)
2738 grows |= (tfirst < 0x200000);
2739 else if (rfirst <= 0x80000000)
2740 grows |= (tfirst < 0x4000000);
2741 }
2742 }
2743 tfirst += diff + 1;
2744 }
2745
2746 none = ++max;
2747 if (del)
2748 del = ++max;
2749
2750 if (max > 0xffff)
2751 bits = 32;
2752 else if (max > 0xff)
2753 bits = 16;
2754 else
2755 bits = 8;
2756
2757 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2758 SvREFCNT_dec(listsv);
2759 if (transv)
2760 SvREFCNT_dec(transv);
2761
2762 if (!del && havefinal)
2763 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2764
2765 if (grows && to_utf)
2766 o->op_private |= OPpTRANS_GROWS;
2767
2768 op_free(expr);
2769 op_free(repl);
2770 return o;
2771 }
2772
2773 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2774 if (complement) {
2775 Zero(tbl, 256, short);
2776 for (i = 0; i < tlen; i++)
ec49126f 2777 tbl[t[i]] = -1;
79072805
LW		 2778 for (i = 0, j = 0; i < 256; i++) {
2779 if (!tbl[i]) {
2780 if (j >= rlen) {
a0ed51b3 2781 if (del)
79072805
LW		 2782 tbl[i] = -2;
2783 else if (rlen)
ec49126f 2784 tbl[i] = r[j-1];
79072805
LW		 2785 else
2786 tbl[i] = i;
2787 }
2788 else
ec49126f 2789 tbl[i] = r[j++];
79072805
LW		 2790 }
2791 }
2792 }
2793 else {
a0ed51b3 2794 if (!rlen && !del) {
79072805 2795 r = t; rlen = tlen;
5d06d08e 2796 if (!squash)
4757a243 2797 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2798 }
2799 for (i = 0; i < 256; i++)
2800 tbl[i] = -1;
2801 for (i = 0, j = 0; i < tlen; i++,j++) {
2802 if (j >= rlen) {
a0ed51b3 2803 if (del) {
ec49126f 2804 if (tbl[t[i]] == -1)
2805 tbl[t[i]] = -2;
79072805
LW		 2806 continue;
2807 }
2808 --j;
2809 }
ec49126f 2810 if (tbl[t[i]] == -1)
2811 tbl[t[i]] = r[j];
79072805
LW		 2812 }
2813 }
2814 op_free(expr);
2815 op_free(repl);
2816
11343788 2817 return o;
79072805
LW		 2818}
2819
2820OP *
864dbfa3 2821Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2822{
11343788 2823 dTHR;
79072805
LW		 2824 PMOP *pmop;
2825
b7dc083c 2826 NewOp(1101, pmop, 1, PMOP);
79072805 2827 pmop->op_type = type;
22c35a8c 2828 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2829 pmop->op_flags = flags;
c07a80fd 2830 pmop->op_private = 0 | (flags >> 8);
79072805 2831
3280af22 2832 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2833 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2834 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2835 pmop->op_pmpermflags |= PMf_LOCALE;
2836 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2837
79072805 2838 /* link into pm list */
3280af22
NIS		 2839 if (type != OP_TRANS && PL_curstash) {
2840 pmop->op_pmnext = HvPMROOT(PL_curstash);
2841 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2842 }
2843
2844 return (OP*)pmop;
2845}
2846
2847OP *
864dbfa3 2848Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2849{
5c0ca799 2850 dTHR;
79072805
LW		 2851 PMOP *pm;
2852 LOGOP *rcop;
ce862d02 2853 I32 repl_has_vars = 0;
79072805 2854
11343788
MB		 2855 if (o->op_type == OP_TRANS)
2856 return pmtrans(o, expr, repl);
79072805 2857
3280af22 2858 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2859 pm = (PMOP*)o;
79072805
LW		 2860
2861 if (expr->op_type == OP_CONST) {
463ee0b2 2862 STRLEN plen;
79072805 2863 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2864 char *p = SvPV(pat, plen);
11343788 2865 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2866 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2867 p = SvPV(pat, plen);
79072805
LW		 2868 pm->op_pmflags |= PMf_SKIPWHITE;
2869 }
393fec97 2870 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2871 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2872 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2873 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2874 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2875 op_free(expr);
2876 }
2877 else {
393fec97
GS		 2878 if (PL_hints & HINT_UTF8)
2879 pm->op_pmdynflags |= PMdf_UTF8;
3280af22
NIS		 2880 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2881 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2882 ? OP_REGCRESET
2883 : OP_REGCMAYBE),0,expr);
463ee0b2 2884
b7dc083c 2885 NewOp(1101, rcop, 1, LOGOP);
79072805 2886 rcop->op_type = OP_REGCOMP;
22c35a8c 2887 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2888 rcop->op_first = scalar(expr);
3280af22 2889 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2890 ? (OPf_SPECIAL | OPf_KIDS)
2891 : OPf_KIDS);
79072805 2892 rcop->op_private = 1;
11343788 2893 rcop->op_other = o;
79072805
LW		 2894
2895 /* establish postfix order */
3280af22 2896 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2897 LINKLIST(expr);
2898 rcop->op_next = expr;
2899 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2900 }
2901 else {
2902 rcop->op_next = LINKLIST(expr);
2903 expr->op_next = (OP*)rcop;
2904 }
79072805 2905
11343788 2906 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2907 }
2908
2909 if (repl) {
748a9306 2910 OP *curop;
0244c3a4 2911 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2912 curop = 0;
57843af0
GS		 2913 if (CopLINE(PL_curcop) < PL_multi_end)
2914 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2915 }
554b3eca 2916#ifdef USE_THREADS
2faa37cc 2917 else if (repl->op_type == OP_THREADSV
554b3eca 2918 && strchr("&`'123456789+",
533c011a 2919 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2920 {
2921 curop = 0;
2922 }
2923#endif /* USE_THREADS */
748a9306
LW		 2924 else if (repl->op_type == OP_CONST)
2925 curop = repl;
79072805 2926 else {
79072805
LW		 2927 OP *lastop = 0;
2928 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2929 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2930#ifdef USE_THREADS
ce862d02
IZ		 2931 if (curop->op_type == OP_THREADSV) {
2932 repl_has_vars = 1;
be949f6f 2933 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2934 break;
554b3eca
MB		 2935 }
2936#else
79072805 2937 if (curop->op_type == OP_GV) {
638eceb6 2938 GV *gv = cGVOPx_gv(curop);
ce862d02 2939 repl_has_vars = 1;
93a17b20 2940 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2941 break;
2942 }
554b3eca 2943#endif /* USE_THREADS */
79072805
LW		 2944 else if (curop->op_type == OP_RV2CV)
2945 break;
2946 else if (curop->op_type == OP_RV2SV ||
2947 curop->op_type == OP_RV2AV ||
2948 curop->op_type == OP_RV2HV ||
2949 curop->op_type == OP_RV2GV) {
2950 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2951 break;
2952 }
748a9306
LW		 2953 else if (curop->op_type == OP_PADSV ||
2954 curop->op_type == OP_PADAV ||
2955 curop->op_type == OP_PADHV ||
554b3eca 2956 curop->op_type == OP_PADANY) {
ce862d02 2957 repl_has_vars = 1;
748a9306 2958 }
1167e5da
SM		 2959 else if (curop->op_type == OP_PUSHRE)
2960 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2961 else
2962 break;
2963 }
2964 lastop = curop;
2965 }
748a9306 2966 }
ce862d02
IZ		 2967 if (curop == repl
2968 && !(repl_has_vars
2969 && (!pm->op_pmregexp
2970 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2971 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2972 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2973 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2974 }
2975 else {
ce862d02
IZ		 2976 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2977 pm->op_pmflags |= PMf_MAYBE_CONST;
2978 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2979 }
b7dc083c 2980 NewOp(1101, rcop, 1, LOGOP);
748a9306 2981 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2982 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2983 rcop->op_first = scalar(repl);
2984 rcop->op_flags |= OPf_KIDS;
2985 rcop->op_private = 1;
11343788 2986 rcop->op_other = o;
748a9306
LW		 2987
2988 /* establish postfix order */
2989 rcop->op_next = LINKLIST(repl);
2990 repl->op_next = (OP*)rcop;
2991
2992 pm->op_pmreplroot = scalar((OP*)rcop);
2993 pm->op_pmreplstart = LINKLIST(rcop);
2994 rcop->op_next = 0;
79072805
LW		 2995 }
2996 }
2997
2998 return (OP*)pm;
2999}
3000
3001OP *
864dbfa3 3002Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3003{
3004 SVOP *svop;
b7dc083c 3005 NewOp(1101, svop, 1, SVOP);
79072805 3006 svop->op_type = type;
22c35a8c 3007 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3008 svop->op_sv = sv;
3009 svop->op_next = (OP*)svop;
3010 svop->op_flags = flags;
22c35a8c 3011 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3012 scalar((OP*)svop);
22c35a8c 3013 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3014 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3015 return CHECKOP(type, svop);
79072805
LW		 3016}
3017
3018OP *
350de78d
GS		 3019Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3020{
3021 PADOP *padop;
3022 NewOp(1101, padop, 1, PADOP);
3023 padop->op_type = type;
3024 padop->op_ppaddr = PL_ppaddr[type];
3025 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3026 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3027 PL_curpad[padop->op_padix] = sv;
7766f137 3028 SvPADTMP_on(sv);
350de78d
GS		 3029 padop->op_next = (OP*)padop;
3030 padop->op_flags = flags;
3031 if (PL_opargs[type] & OA_RETSCALAR)
3032 scalar((OP*)padop);
3033 if (PL_opargs[type] & OA_TARGET)
3034 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3035 return CHECKOP(type, padop);
3036}
3037
3038OP *
864dbfa3 3039Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3040{
11343788 3041 dTHR;
350de78d 3042#ifdef USE_ITHREADS
743e66e6 3043 GvIN_PAD_on(gv);
350de78d
GS		 3044 return newPADOP(type, flags, SvREFCNT_inc(gv));
3045#else
7934575e 3046 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3047#endif
79072805
LW		 3048}
3049
3050OP *
864dbfa3 3051Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3052{
3053 PVOP *pvop;
b7dc083c 3054 NewOp(1101, pvop, 1, PVOP);
79072805 3055 pvop->op_type = type;
22c35a8c 3056 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3057 pvop->op_pv = pv;
3058 pvop->op_next = (OP*)pvop;
3059 pvop->op_flags = flags;
22c35a8c 3060 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3061 scalar((OP*)pvop);
22c35a8c 3062 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3063 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3064 return CHECKOP(type, pvop);
79072805
LW		 3065}
3066
79072805 3067void
864dbfa3 3068Perl_package(pTHX_ OP *o)
79072805 3069{
11343788 3070 dTHR;
93a17b20 3071 SV *sv;
79072805 3072
3280af22
NIS		 3073 save_hptr(&PL_curstash);
3074 save_item(PL_curstname);
11343788 3075 if (o) {
463ee0b2
LW		 3076 STRLEN len;
3077 char *name;
11343788 3078 sv = cSVOPo->op_sv;
463ee0b2 3079 name = SvPV(sv, len);
3280af22
NIS		 3080 PL_curstash = gv_stashpvn(name,len,TRUE);
3081 sv_setpvn(PL_curstname, name, len);
11343788 3082 op_free(o);
93a17b20
LW		 3083 }
3084 else {
3280af22
NIS		 3085 sv_setpv(PL_curstname,"<none>");
3086 PL_curstash = Nullhv;
93a17b20 3087 }
7ad382f4 3088 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3089 PL_copline = NOLINE;
3090 PL_expect = XSTATE;
79072805
LW		 3091}
3092
85e6fe83 3093void
864dbfa3 3094Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3095{
a0d0e21e
LW		 3096 OP *pack;
3097 OP *meth;
3098 OP *rqop;
3099 OP *imop;
b1cb66bf 3100 OP *veop;
78ca652e 3101 GV *gv;
85e6fe83 3102
a0d0e21e 3103 if (id->op_type != OP_CONST)
cea2e8a9 3104 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3105
b1cb66bf 3106 veop = Nullop;
3107
0f79a09d 3108 if (version != Nullop) {
b1cb66bf 3109 SV *vesv = ((SVOP*)version)->op_sv;
3110
3111 if (arg == Nullop && !SvNIOK(vesv)) {
3112 arg = version;
3113 }
3114 else {
3115 OP *pack;
0f79a09d 3116 SV *meth;
b1cb66bf 3117
3118 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 3119 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3120
3121 /* Make copy of id so we don't free it twice */
3122 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3123
3124 /* Fake up a method call to VERSION */
0f79a09d
GS		 3125 meth = newSVpvn("VERSION",7);
3126 sv_upgrade(meth, SVt_PVIV);
3127 SvIOK_on(meth);
3128 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3129 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3130 append_elem(OP_LIST,
0f79a09d
GS		 3131 prepend_elem(OP_LIST, pack, list(version)),
3132 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3133 }
3134 }
aeea060c 3135
a0d0e21e 3136 /* Fake up an import/unimport */
4633a7c4
LW		 3137 if (arg && arg->op_type == OP_STUB)
3138 imop = arg; /* no import on explicit () */
0f79a09d 3139 else if (SvNIOK(((SVOP*)id)->op_sv)) {
b1cb66bf 3140 imop = Nullop; /* use 5.0; */
3141 }
4633a7c4 3142 else {
0f79a09d
GS		 3143 SV *meth;
3144
4633a7c4
LW		 3145 /* Make copy of id so we don't free it twice */
3146 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3147
3148 /* Fake up a method call to import/unimport */
3149 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3150 sv_upgrade(meth, SVt_PVIV);
3151 SvIOK_on(meth);
3152 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3153 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3154 append_elem(OP_LIST,
3155 prepend_elem(OP_LIST, pack, list(arg)),
3156 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3157 }
3158
78ca652e
GS		 3159 /* Fake up a require, handle override, if any */
3160 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3161 if (!(gv && GvIMPORTED_CV(gv)))
3162 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3163
3164 if (gv && GvIMPORTED_CV(gv)) {
3165 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3166 append_elem(OP_LIST, id,
3167 scalar(newUNOP(OP_RV2CV, 0,
3168 newGVOP(OP_GV, 0,
3169 gv))))));
3170 }
3171 else {
3172 rqop = newUNOP(OP_REQUIRE, 0, id);
3173 }
a0d0e21e
LW		 3174
3175 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3176 newATTRSUB(floor,
79cb57f6 3177 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3178 Nullop,
09bef843 3179 Nullop,
a0d0e21e 3180 append_elem(OP_LINESEQ,
b1cb66bf 3181 append_elem(OP_LINESEQ,
3182 newSTATEOP(0, Nullch, rqop),
3183 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3184 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3185
c305c6a0 3186 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3187 PL_copline = NOLINE;
3188 PL_expect = XSTATE;
85e6fe83
LW		 3189}
3190
79072805 3191OP *
864dbfa3 3192Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3193{
3194 OP *doop;
3195 GV *gv;
3196
3197 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3198 if (!(gv && GvIMPORTED_CV(gv)))
3199 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3200
3201 if (gv && GvIMPORTED_CV(gv)) {
3202 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3203 append_elem(OP_LIST, term,
3204 scalar(newUNOP(OP_RV2CV, 0,
3205 newGVOP(OP_GV, 0,
3206 gv))))));
3207 }
3208 else {
3209 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3210 }
3211 return doop;
3212}
3213
3214OP *
864dbfa3 3215Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3216{
3217 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3218 list(force_list(subscript)),
3219 list(force_list(listval)) );
79072805
LW		 3220}
3221
76e3520e 3222STATIC I32
cea2e8a9 3223S_list_assignment(pTHX_ register OP *o)
79072805 3224{
11343788 3225 if (!o)
79072805
LW		 3226 return TRUE;
3227
11343788
MB		 3228 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3229 o = cUNOPo->op_first;
79072805 3230
11343788 3231 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3232 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3233 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3234
3235 if (t && f)
3236 return TRUE;
3237 if (t || f)
3238 yyerror("Assignment to both a list and a scalar");
3239 return FALSE;
3240 }
3241
11343788
MB		 3242 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3243 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3244 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3245 return TRUE;
3246
11343788 3247 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3248 return TRUE;
3249
11343788 3250 if (o->op_type == OP_RV2SV)
79072805
LW		 3251 return FALSE;
3252
3253 return FALSE;
3254}
3255
3256OP *
864dbfa3 3257Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3258{
11343788 3259 OP *o;
79072805 3260
a0d0e21e
LW		 3261 if (optype) {
3262 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3263 return newLOGOP(optype, 0,
3264 mod(scalar(left), optype),
3265 newUNOP(OP_SASSIGN, 0, scalar(right)));
3266 }
3267 else {
3268 return newBINOP(optype, OPf_STACKED,
3269 mod(scalar(left), optype), scalar(right));
3270 }
3271 }
3272
79072805 3273 if (list_assignment(left)) {
6ee623d5 3274 dTHR;
3280af22
NIS		 3275 PL_modcount = 0;
3276 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3277 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3278 if (PL_eval_start)
3279 PL_eval_start = 0;
748a9306 3280 else {
a0d0e21e
LW		 3281 op_free(left);
3282 op_free(right);
3283 return Nullop;
3284 }
11343788 3285 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3286 list(force_list(right)),
3287 list(force_list(left)) );
11343788 3288 o->op_private = 0 | (flags >> 8);
a0d0e21e 3289 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3290 OP *curop;
11343788 3291 OP *lastop = o;
3280af22 3292 PL_generation++;
11343788 3293 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3294 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3295 if (curop->op_type == OP_GV) {
638eceb6 3296 GV *gv = cGVOPx_gv(curop);
3280af22 3297 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3298 break;
3280af22 3299 SvCUR(gv) = PL_generation;
79072805 3300 }
748a9306
LW		 3301 else if (curop->op_type == OP_PADSV ||
3302 curop->op_type == OP_PADAV ||
3303 curop->op_type == OP_PADHV ||
3304 curop->op_type == OP_PADANY) {
3280af22 3305 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3306 SV *sv = svp[curop->op_targ];
3280af22 3307 if (SvCUR(sv) == PL_generation)
748a9306 3308 break;
3280af22 3309 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3310 }
79072805
LW		 3311 else if (curop->op_type == OP_RV2CV)
3312 break;
3313 else if (curop->op_type == OP_RV2SV ||
3314 curop->op_type == OP_RV2AV ||
3315 curop->op_type == OP_RV2HV ||
3316 curop->op_type == OP_RV2GV) {
3317 if (lastop->op_type != OP_GV) /* funny deref? */
3318 break;
3319 }
1167e5da
SM		 3320 else if (curop->op_type == OP_PUSHRE) {
3321 if (((PMOP*)curop)->op_pmreplroot) {
3322 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3323 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3324 break;
3280af22 3325 SvCUR(gv) = PL_generation;
1167e5da
SM		 3326 }
3327 }
79072805
LW		 3328 else
3329 break;
3330 }
3331 lastop = curop;
3332 }
11343788
MB		 3333 if (curop != o)
3334 o->op_private = OPpASSIGN_COMMON;
79072805 3335 }
c07a80fd 3336 if (right && right->op_type == OP_SPLIT) {
3337 OP* tmpop;
3338 if ((tmpop = ((LISTOP*)right)->op_first) &&
3339 tmpop->op_type == OP_PUSHRE)
3340 {
3341 PMOP *pm = (PMOP*)tmpop;
3342 if (left->op_type == OP_RV2AV &&
3343 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3344 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3345 {
3346 tmpop = ((UNOP*)left)->op_first;
3347 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3348#ifdef USE_ITHREADS
3349 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3350 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3351#else
3352 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3353 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3354#endif
c07a80fd 3355 pm->op_pmflags |= PMf_ONCE;
11343788 3356 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3357 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3358 tmpop->op_sibling = Nullop; /* don't free split */
3359 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3360 op_free(o); /* blow off assign */
54310121 3361 right->op_flags &= ~OPf_WANT;
a5f75d66 3362 /* "I don't know and I don't care." */
c07a80fd 3363 return right;
3364 }
3365 }
3366 else {
3280af22 3367 if (PL_modcount < 10000 &&
c07a80fd 3368 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3369 {
3370 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3371 if (SvIVX(sv) == 0)
3280af22 3372 sv_setiv(sv, PL_modcount+1);
c07a80fd 3373 }
3374 }
3375 }
3376 }
11343788 3377 return o;
79072805
LW		 3378 }
3379 if (!right)
3380 right = newOP(OP_UNDEF, 0);
3381 if (right->op_type == OP_READLINE) {
3382 right->op_flags |= OPf_STACKED;
463ee0b2 3383 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3384 }
a0d0e21e 3385 else {
3280af22 3386 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3387 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3388 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3389 if (PL_eval_start)
3390 PL_eval_start = 0;
748a9306 3391 else {
11343788 3392 op_free(o);
a0d0e21e
LW		 3393 return Nullop;
3394 }
3395 }
11343788 3396 return o;
79072805
LW		 3397}
3398
3399OP *
864dbfa3 3400Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3401{
11343788 3402 dTHR;
bbce6d69 3403 U32 seq = intro_my();
79072805
LW		 3404 register COP *cop;
3405
b7dc083c 3406 NewOp(1101, cop, 1, COP);
57843af0 3407 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3408 cop->op_type = OP_DBSTATE;
22c35a8c 3409 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3410 }
3411 else {
3412 cop->op_type = OP_NEXTSTATE;
22c35a8c 3413 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3414 }
79072805 3415 cop->op_flags = flags;
393fec97 3416 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3417#ifdef NATIVE_HINTS
3418 cop->op_private |= NATIVE_HINTS;
3419#endif
e24b16f9 3420 PL_compiling.op_private = cop->op_private;
79072805
LW		 3421 cop->op_next = (OP*)cop;
3422
463ee0b2
LW		 3423 if (label) {
3424 cop->cop_label = label;
3280af22 3425 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3426 }
bbce6d69 3427 cop->cop_seq = seq;
3280af22 3428 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3429 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3430 cop->cop_warnings = PL_curcop->cop_warnings ;
3431 else
3432 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3433
79072805 3434
3280af22 3435 if (PL_copline == NOLINE)
57843af0 3436 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3437 else {
57843af0 3438 CopLINE_set(cop, PL_copline);
3280af22 3439 PL_copline = NOLINE;
79072805 3440 }
57843af0
GS		 3441#ifdef USE_ITHREADS
3442 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3443#else
cc49e20b 3444 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3445#endif
11faa288 3446 CopSTASH_set(cop, PL_curstash);
79072805 3447
3280af22 3448 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3449 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3450 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3451 (void)SvIOK_on(*svp);
57b2e452 3452 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3453 }
3454 }
3455
11343788 3456 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3457}
3458
bbce6d69 3459/* "Introduce" my variables to visible status. */
3460U32
864dbfa3 3461Perl_intro_my(pTHX)
bbce6d69 3462{
3463 SV **svp;
3464 SV *sv;
3465 I32 i;
3466
3280af22
NIS		 3467 if (! PL_min_intro_pending)
3468 return PL_cop_seqmax;
bbce6d69 3469
3280af22
NIS		 3470 svp = AvARRAY(PL_comppad_name);
3471 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3472 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3473 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3474 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3475 }
3476 }
3280af22
NIS		 3477 PL_min_intro_pending = 0;
3478 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3479 return PL_cop_seqmax++;
bbce6d69 3480}
3481
79072805 3482OP *
864dbfa3 3483Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3484{
883ffac3
CS		 3485 return new_logop(type, flags, &first, &other);
3486}
3487
3bd495df 3488STATIC OP *
cea2e8a9 3489S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3490{
11343788 3491 dTHR;
79072805 3492 LOGOP *logop;
11343788 3493 OP *o;
883ffac3
CS		 3494 OP *first = *firstp;
3495 OP *other = *otherp;
79072805 3496
a0d0e21e
LW		 3497 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3498 return newBINOP(type, flags, scalar(first), scalar(other));
3499
8990e307 3500 scalarboolean(first);
79072805
LW		 3501 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3502 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3503 if (type == OP_AND || type == OP_OR) {
3504 if (type == OP_AND)
3505 type = OP_OR;
3506 else
3507 type = OP_AND;
11343788 3508 o = first;
883ffac3 3509 first = *firstp = cUNOPo->op_first;
11343788
MB		 3510 if (o->op_next)
3511 first->op_next = o->op_next;
3512 cUNOPo->op_first = Nullop;
3513 op_free(o);
79072805
LW		 3514 }
3515 }
3516 if (first->op_type == OP_CONST) {
599cee73 3517 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3518 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3519 PL_op_desc[type]);
79072805
LW		 3520 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3521 op_free(first);
883ffac3 3522 *firstp = Nullop;
79072805
LW		 3523 return other;
3524 }
3525 else {
3526 op_free(other);
883ffac3 3527 *otherp = Nullop;
79072805
LW		 3528 return first;
3529 }
3530 }
3531 else if (first->op_type == OP_WANTARRAY) {
3532 if (type == OP_AND)
3533 list(other);
3534 else
3535 scalar(other);
3536 }
599cee73 3537 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3538 OP *k1 = ((UNOP*)first)->op_first;
3539 OP *k2 = k1->op_sibling;
3540 OPCODE warnop = 0;
3541 switch (first->op_type)
3542 {
3543 case OP_NULL:
3544 if (k2 && k2->op_type == OP_READLINE
3545 && (k2->op_flags & OPf_STACKED)
55d729e4 3546 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3547 {
a6006777 3548 warnop = k2->op_type;
72b16652 3549 }
a6006777 3550 break;
3551
3552 case OP_SASSIGN:
68dc0745 3553 if (k1->op_type == OP_READDIR
3554 || k1->op_type == OP_GLOB
72b16652 3555 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3556 || k1->op_type == OP_EACH)
72b16652
GS		 3557 {
3558 warnop = ((k1->op_type == OP_NULL)
3559 ? k1->op_targ : k1->op_type);
3560 }
a6006777 3561 break;
3562 }
8ebc5c01 3563 if (warnop) {
57843af0
GS		 3564 line_t oldline = CopLINE(PL_curcop);
3565 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 3566 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3567 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3568 PL_op_desc[warnop],
68dc0745 3569 ((warnop == OP_READLINE || warnop == OP_GLOB)
3570 ? " construct" : "() operator"));
57843af0 3571 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3572 }
a6006777 3573 }
79072805
LW		 3574
3575 if (!other)
3576 return first;
3577
a0d0e21e
LW		 3578 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3579 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3580
b7dc083c 3581 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3582
3583 logop->op_type = type;
22c35a8c 3584 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3585 logop->op_first = first;
3586 logop->op_flags = flags | OPf_KIDS;
3587 logop->op_other = LINKLIST(other);
c07a80fd 3588 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3589
3590 /* establish postfix order */
3591 logop->op_next = LINKLIST(first);
3592 first->op_next = (OP*)logop;
3593 first->op_sibling = other;
3594
11343788
MB		 3595 o = newUNOP(OP_NULL, 0, (OP*)logop);
3596 other->op_next = o;
79072805 3597
11343788 3598 return o;
79072805
LW		 3599}
3600
3601OP *
864dbfa3 3602Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3603{
11343788 3604 dTHR;
1a67a97c
SM		 3605 LOGOP *logop;
3606 OP *start;
11343788 3607 OP *o;
79072805 3608
b1cb66bf 3609 if (!falseop)
3610 return newLOGOP(OP_AND, 0, first, trueop);
3611 if (!trueop)
3612 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3613
8990e307 3614 scalarboolean(first);
79072805
LW		 3615 if (first->op_type == OP_CONST) {
3616 if (SvTRUE(((SVOP*)first)->op_sv)) {
3617 op_free(first);
b1cb66bf 3618 op_free(falseop);
3619 return trueop;
79072805
LW		 3620 }
3621 else {
3622 op_free(first);
b1cb66bf 3623 op_free(trueop);
3624 return falseop;
79072805
LW		 3625 }
3626 }
3627 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3628 list(trueop);
3629 scalar(falseop);
79072805 3630 }
1a67a97c
SM		 3631 NewOp(1101, logop, 1, LOGOP);
3632 logop->op_type = OP_COND_EXPR;
3633 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3634 logop->op_first = first;
3635 logop->op_flags = flags | OPf_KIDS;
3636 logop->op_private = 1 | (flags >> 8);
3637 logop->op_other = LINKLIST(trueop);
3638 logop->op_next = LINKLIST(falseop);
79072805 3639
79072805
LW		 3640
3641 /* establish postfix order */
1a67a97c
SM		 3642 start = LINKLIST(first);
3643 first->op_next = (OP*)logop;
79072805 3644
b1cb66bf 3645 first->op_sibling = trueop;
3646 trueop->op_sibling = falseop;
1a67a97c 3647 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3648
1a67a97c 3649 trueop->op_next = falseop->op_next = o;
79072805 3650
1a67a97c 3651 o->op_next = start;
11343788 3652 return o;
79072805
LW		 3653}
3654
3655OP *
864dbfa3 3656Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3657{
b35b2403 3658 dTHR;
1a67a97c 3659 LOGOP *range;
79072805
LW		 3660 OP *flip;
3661 OP *flop;
1a67a97c 3662 OP *leftstart;
11343788 3663 OP *o;
79072805 3664
1a67a97c 3665 NewOp(1101, range, 1, LOGOP);
79072805 3666
1a67a97c
SM		 3667 range->op_type = OP_RANGE;
3668 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3669 range->op_first = left;
3670 range->op_flags = OPf_KIDS;
3671 leftstart = LINKLIST(left);
3672 range->op_other = LINKLIST(right);
3673 range->op_private = 1 | (flags >> 8);
79072805
LW		 3674
3675 left->op_sibling = right;
3676
1a67a97c
SM		 3677 range->op_next = (OP*)range;
3678 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3679 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3680 o = newUNOP(OP_NULL, 0, flop);
79072805 3681 linklist(flop);
1a67a97c 3682 range->op_next = leftstart;
79072805
LW		 3683
3684 left->op_next = flip;
3685 right->op_next = flop;
3686
1a67a97c
SM		 3687 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3688 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3689 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3690 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3691
3692 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3693 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3694
11343788 3695 flip->op_next = o;
79072805 3696 if (!flip->op_private || !flop->op_private)
11343788 3697 linklist(o); /* blow off optimizer unless constant */
79072805 3698
11343788 3699 return o;
79072805
LW		 3700}
3701
3702OP *
864dbfa3 3703Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3704{
11343788 3705 dTHR;
463ee0b2 3706 OP* listop;
11343788 3707 OP* o;
463ee0b2 3708 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3709 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3710
463ee0b2
LW		 3711 if (expr) {
3712 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3713 return block; /* do {} while 0 does once */
fb73857a 3714 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3715 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3716 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3717 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3718 } else if (expr->op_flags & OPf_KIDS) {
3719 OP *k1 = ((UNOP*)expr)->op_first;
3720 OP *k2 = (k1) ? k1->op_sibling : NULL;
3721 switch (expr->op_type) {
3722 case OP_NULL:
3723 if (k2 && k2->op_type == OP_READLINE
3724 && (k2->op_flags & OPf_STACKED)
3725 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3726 expr = newUNOP(OP_DEFINED, 0, expr);
3727 break;
3728
3729 case OP_SASSIGN:
3730 if (k1->op_type == OP_READDIR
3731 || k1->op_type == OP_GLOB
72b16652 3732 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3733 || k1->op_type == OP_EACH)
3734 expr = newUNOP(OP_DEFINED, 0, expr);
3735 break;
3736 }
774d564b 3737 }
463ee0b2 3738 }
93a17b20 3739
8990e307 3740 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3741 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3742
883ffac3
CS		 3743 if (listop)
3744 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3745
11343788
MB		 3746 if (once && o != listop)
3747 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3748
11343788
MB		 3749 if (o == listop)
3750 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3751
11343788
MB		 3752 o->op_flags |= flags;
3753 o = scope(o);
3754 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3755 return o;
79072805
LW		 3756}
3757
3758OP *
864dbfa3 3759Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3760{
11343788 3761 dTHR;
79072805
LW		 3762 OP *redo;
3763 OP *next = 0;
3764 OP *listop;
11343788 3765 OP *o;
79072805
LW		 3766 OP *condop;
3767
fb73857a 3768 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3769 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3770 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3771 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3772 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3773 OP *k1 = ((UNOP*)expr)->op_first;
3774 OP *k2 = (k1) ? k1->op_sibling : NULL;
3775 switch (expr->op_type) {
3776 case OP_NULL:
3777 if (k2 && k2->op_type == OP_READLINE
3778 && (k2->op_flags & OPf_STACKED)
3779 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3780 expr = newUNOP(OP_DEFINED, 0, expr);
3781 break;
3782
3783 case OP_SASSIGN:
3784 if (k1->op_type == OP_READDIR
3785 || k1->op_type == OP_GLOB
72b16652 3786 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3787 || k1->op_type == OP_EACH)
3788 expr = newUNOP(OP_DEFINED, 0, expr);
3789 break;
3790 }
748a9306 3791 }
79072805
LW		 3792
3793 if (!block)
3794 block = newOP(OP_NULL, 0);
87246558
GS		 3795 else if (cont) {
3796 block = scope(block);
3797 }
79072805
LW		 3798
3799 if (cont)
3800 next = LINKLIST(cont);
fb73857a 3801 if (expr) {
79072805 3802 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3803 if ((line_t)whileline != NOLINE) {
3280af22 3804 PL_copline = whileline;
fb73857a 3805 cont = append_elem(OP_LINESEQ, cont,
3806 newSTATEOP(0, Nullch, Nullop));
3807 }
3808 }
79072805 3809
463ee0b2 3810 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3811 redo = LINKLIST(listop);
3812
3813 if (expr) {
3280af22 3814 PL_copline = whileline;
883ffac3
CS		 3815 scalar(listop);
3816 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3817 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3818 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3819 op_free((OP*)loop);
883ffac3 3820 return Nullop; /* listop already freed by new_logop */
463ee0b2 3821 }
883ffac3
CS		 3822 if (listop)
3823 ((LISTOP*)listop)->op_last->op_next = condop =
3824 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3825 if (!next)
3826 next = condop;
3827 }
3828 else
11343788 3829 o = listop;
79072805
LW		 3830
3831 if (!loop) {
b7dc083c 3832 NewOp(1101,loop,1,LOOP);
79072805 3833 loop->op_type = OP_ENTERLOOP;
22c35a8c 3834 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3835 loop->op_private = 0;
3836 loop->op_next = (OP*)loop;
3837 }
3838
11343788 3839 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3840
3841 loop->op_redoop = redo;
11343788 3842 loop->op_lastop = o;
79072805
LW		 3843
3844 if (next)
3845 loop->op_nextop = next;
3846 else
11343788 3847 loop->op_nextop = o;
79072805 3848
11343788
MB		 3849 o->op_flags |= flags;
3850 o->op_private |= (flags >> 8);
3851 return o;
79072805
LW		 3852}
3853
3854OP *
864dbfa3 3855Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3856{
3857 LOOP *loop;
b7dc083c 3858 LOOP *tmp;
fb73857a 3859 OP *wop;
85e6fe83 3860 int padoff = 0;
4633a7c4 3861 I32 iterflags = 0;
79072805 3862
79072805 3863 if (sv) {
85e6fe83 3864 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3865 sv->op_type = OP_RV2GV;
22c35a8c 3866 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3867 }
85e6fe83
LW		 3868 else if (sv->op_type == OP_PADSV) { /* private variable */
3869 padoff = sv->op_targ;
743e66e6 3870 sv->op_targ = 0;
85e6fe83
LW		 3871 op_free(sv);
3872 sv = Nullop;
3873 }
54b9620d
MB		 3874 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3875 padoff = sv->op_targ;
743e66e6 3876 sv->op_targ = 0;
54b9620d
MB		 3877 iterflags |= OPf_SPECIAL;
3878 op_free(sv);
3879 sv = Nullop;
3880 }
79072805 3881 else
cea2e8a9 3882 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3883 }
3884 else {
54b9620d
MB		 3885#ifdef USE_THREADS
3886 padoff = find_threadsv("_");
3887 iterflags |= OPf_SPECIAL;
3888#else
3280af22 3889 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3890#endif
79072805 3891 }
5f05dabc 3892 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3893 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3894 iterflags |= OPf_STACKED;
3895 }
89ea2908
GA		 3896 else if (expr->op_type == OP_NULL &&
3897 (expr->op_flags & OPf_KIDS) &&
3898 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3899 {
3900 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3901 * set the STACKED flag to indicate that these values are to be
3902 * treated as min/max values by 'pp_iterinit'.
3903 */
3904 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3905 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3906 OP* left = range->op_first;
3907 OP* right = left->op_sibling;
5152d7c7 3908 LISTOP* listop;
89ea2908
GA		 3909
3910 range->op_flags &= ~OPf_KIDS;
3911 range->op_first = Nullop;
3912
5152d7c7 3913 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3914 listop->op_first->op_next = range->op_next;
3915 left->op_next = range->op_other;
5152d7c7
GS		 3916 right->op_next = (OP*)listop;
3917 listop->op_next = listop->op_first;
89ea2908
GA		 3918
3919 op_free(expr);
5152d7c7 3920 expr = (OP*)(listop);
89ea2908
GA		 3921 null(expr);
3922 iterflags |= OPf_STACKED;
3923 }
3924 else {
3925 expr = mod(force_list(expr), OP_GREPSTART);
3926 }
3927
3928
4633a7c4 3929 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3930 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3931 assert(!loop->op_next);
b7dc083c
NIS		 3932#ifdef PL_OP_SLAB_ALLOC
3933 NewOp(1234,tmp,1,LOOP);
3934 Copy(loop,tmp,1,LOOP);
3935 loop = tmp;
3936#else
85e6fe83 3937 Renew(loop, 1, LOOP);
b7dc083c 3938#endif
85e6fe83 3939 loop->op_targ = padoff;
fb73857a 3940 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3941 PL_copline = forline;
fb73857a 3942 return newSTATEOP(0, label, wop);
79072805
LW		 3943}
3944
8990e307 3945OP*
864dbfa3 3946Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3947{
11343788
MB		 3948 dTHR;
3949 OP *o;
2d8e6c8d
GS		 3950 STRLEN n_a;
3951
8990e307 3952 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3953 /* "last()" means "last" */
3954 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3955 o = newOP(type, OPf_SPECIAL);
3956 else {
3957 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3958 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3959 : ""));
3960 }
8990e307
LW		 3961 op_free(label);
3962 }
3963 else {
a0d0e21e
LW		 3964 if (label->op_type == OP_ENTERSUB)
3965 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3966 o = newUNOP(type, OPf_STACKED, label);
8990e307 3967 }
3280af22 3968 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3969 return o;
8990e307
LW		 3970}
3971
79072805 3972void
864dbfa3 3973Perl_cv_undef(pTHX_ CV *cv)
79072805 3974{
11343788
MB		 3975 dTHR;
3976#ifdef USE_THREADS
e858de61
MB		 3977 if (CvMUTEXP(cv)) {
3978 MUTEX_DESTROY(CvMUTEXP(cv));
3979 Safefree(CvMUTEXP(cv));
3980 CvMUTEXP(cv) = 0;
3981 }
11343788
MB		 3982#endif /* USE_THREADS */
3983
a0d0e21e 3984 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3985#ifdef USE_THREADS
3986 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3987 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3988#else
a0d0e21e 3989 if (CvDEPTH(cv))
cea2e8a9 3990 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3991#endif /* USE_THREADS */
8990e307 3992 ENTER;
a0d0e21e 3993
7766f137 3994 SAVEVPTR(PL_curpad);
3280af22 3995 PL_curpad = 0;
a0d0e21e 3996
a5f75d66 3997 if (!CvCLONED(cv))
748a9306 3998 op_free(CvROOT(cv));
79072805 3999 CvROOT(cv) = Nullop;
8990e307 4000 LEAVE;
79072805 4001 }
1d5db326 4002 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4003 CvFLAGS(cv) = 0;
8e07c86e
AD		 4004 SvREFCNT_dec(CvGV(cv));
4005 CvGV(cv) = Nullgv;
4006 SvREFCNT_dec(CvOUTSIDE(cv));
4007 CvOUTSIDE(cv) = Nullcv;
4008 if (CvPADLIST(cv)) {
8ebc5c01 4009 /* may be during global destruction */
4010 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4011 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4012 while (i >= 0) {
4013 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4014 SV* sv = svp ? *svp : Nullsv;
4015 if (!sv)
4016 continue;
3280af22
NIS		 4017 if (sv == (SV*)PL_comppad_name)
4018 PL_comppad_name = Nullav;
4019 else if (sv == (SV*)PL_comppad) {
4020 PL_comppad = Nullav;
4021 PL_curpad = Null(SV**);
46fc3d4c 4022 }
4023 SvREFCNT_dec(sv);
8ebc5c01 4024 }
4025 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4026 }
8e07c86e
AD		 4027 CvPADLIST(cv) = Nullav;
4028 }
79072805
LW		 4029}
4030
76e3520e 4031STATIC void
743e66e6 4032S_cv_dump(pTHX_ CV *cv)
5f05dabc 4033{
62fde642 4034#ifdef DEBUGGING
5f05dabc 4035 CV *outside = CvOUTSIDE(cv);
4036 AV* padlist = CvPADLIST(cv);
4fdae800 4037 AV* pad_name;
4038 AV* pad;
4039 SV** pname;
4040 SV** ppad;
5f05dabc 4041 I32 ix;
4042
b900a521
JH		 4043 PerlIO_printf(Perl_debug_log,
4044 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4045 PTR2UV(cv),
ab50184a 4046 (CvANON(cv) ? "ANON"
6b88bc9c 4047 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4048 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4049 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4050 PTR2UV(outside),
ab50184a
CS		 4051 (!outside ? "null"
4052 : CvANON(outside) ? "ANON"
6b88bc9c 4053 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4054 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4055 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4056
4fdae800 4057 if (!padlist)
4058 return;
4059
4060 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4061 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4062 pname = AvARRAY(pad_name);
4063 ppad = AvARRAY(pad);
4064
93965878 4065 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4066 if (SvPOK(pname[ix]))
b900a521
JH		 4067 PerlIO_printf(Perl_debug_log,
4068 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4069 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4070 SvFAKE(pname[ix]) ? "FAKE " : "",
4071 SvPVX(pname[ix]),
b900a521
JH		 4072 (IV)I_32(SvNVX(pname[ix])),
4073 SvIVX(pname[ix]));
5f05dabc 4074 }
743e66e6 4075#endif /* DEBUGGING */
62fde642 4076}
5f05dabc 4077
76e3520e 4078STATIC CV *
cea2e8a9 4079S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4080{
11343788 4081 dTHR;
748a9306
LW		 4082 AV* av;
4083 I32 ix;
4084 AV* protopadlist = CvPADLIST(proto);
4085 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4086 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4087 SV** pname = AvARRAY(protopad_name);
4088 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4089 I32 fname = AvFILLp(protopad_name);
4090 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4091 AV* comppadlist;
4092 CV* cv;
4093
07055b4c
CS		 4094 assert(!CvUNIQUE(proto));
4095
748a9306 4096 ENTER;
354992b1 4097 SAVECOMPPAD();
3280af22
NIS		 4098 SAVESPTR(PL_comppad_name);
4099 SAVESPTR(PL_compcv);
748a9306 4100
3280af22 4101 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4102 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 4103 CvCLONED_on(cv);
5f05dabc 4104 if (CvANON(proto))
4105 CvANON_on(cv);
748a9306 4106
11343788 4107#ifdef USE_THREADS
12ca11f6 4108 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4109 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4110 CvOWNER(cv) = 0;
4111#endif /* USE_THREADS */
57843af0 4112 CvFILE(cv) = CvFILE(proto);
44a8e56a 4113 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4114 CvSTASH(cv) = CvSTASH(proto);
4115 CvROOT(cv) = CvROOT(proto);
4116 CvSTART(cv) = CvSTART(proto);
5f05dabc 4117 if (outside)
4118 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4119
68dc0745 4120 if (SvPOK(proto))
4121 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4122
3280af22 4123 PL_comppad_name = newAV();
46fc3d4c 4124 for (ix = fname; ix >= 0; ix--)
3280af22 4125 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4126
3280af22 4127 PL_comppad = newAV();
748a9306
LW		 4128
4129 comppadlist = newAV();
4130 AvREAL_off(comppadlist);
3280af22
NIS		 4131 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4132 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4133 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4134 av_fill(PL_comppad, AvFILLp(protopad));
4135 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4136
4137 av = newAV(); /* will be @_ */
4138 av_extend(av, 0);
3280af22 4139 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4140 AvFLAGS(av) = AVf_REIFY;
4141
9607fc9c 4142 for (ix = fpad; ix > 0; ix--) {
4143 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4144 if (namesv && namesv != &PL_sv_undef) {
aa689395 4145 char *name = SvPVX(namesv); /* XXX */
4146 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4147 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4148 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4149 if (!off)
3280af22 4150 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4151 else if (off != ix)
cea2e8a9 4152 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4153 }
4154 else { /* our own lexical */
aa689395 4155 SV* sv;
5f05dabc 4156 if (*name == '&') {
4157 /* anon code -- we'll come back for it */
4158 sv = SvREFCNT_inc(ppad[ix]);
4159 }
4160 else if (*name == '@')
4161 sv = (SV*)newAV();
748a9306 4162 else if (*name == '%')
5f05dabc 4163 sv = (SV*)newHV();
748a9306 4164 else
5f05dabc 4165 sv = NEWSV(0,0);
4166 if (!SvPADBUSY(sv))
4167 SvPADMY_on(sv);
3280af22 4168 PL_curpad[ix] = sv;
748a9306
LW		 4169 }
4170 }
7766f137 4171 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4172 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4173 }
748a9306 4174 else {
aa689395 4175 SV* sv = NEWSV(0,0);
748a9306 4176 SvPADTMP_on(sv);
3280af22 4177 PL_curpad[ix] = sv;
748a9306
LW		 4178 }
4179 }
4180
5f05dabc 4181 /* Now that vars are all in place, clone nested closures. */
4182
9607fc9c 4183 for (ix = fpad; ix > 0; ix--) {
4184 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4185 if (namesv
3280af22 4186 && namesv != &PL_sv_undef
aa689395 4187 && !(SvFLAGS(namesv) & SVf_FAKE)
4188 && *SvPVX(namesv) == '&'
5f05dabc 4189 && CvCLONE(ppad[ix]))
4190 {
4191 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4192 SvREFCNT_dec(ppad[ix]);
4193 CvCLONE_on(kid);
4194 SvPADMY_on(kid);
3280af22 4195 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4196 }
4197 }
4198
5f05dabc 4199#ifdef DEBUG_CLOSURES
ab50184a
CS		 4200 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4201 cv_dump(outside);
4202 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4203 cv_dump(proto);
ab50184a 4204 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4205 cv_dump(cv);
4206#endif
4207
748a9306
LW		 4208 LEAVE;
4209 return cv;
4210}
4211
4212CV *
864dbfa3 4213Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4214{
b099ddc0 4215 CV *cv;
1feb2720 4216 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4217 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4218 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4219 return cv;
5f05dabc 4220}
4221
3fe9a6f1 4222void
864dbfa3 4223Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4224{
0453d815
PM		 4225 dTHR;
4226
f248d071 4227 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 4228 SV* msg = sv_newmortal();
3fe9a6f1 4229 SV* name = Nullsv;
4230
4231 if (gv)
46fc3d4c 4232 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4233 sv_setpv(msg, "Prototype mismatch:");
4234 if (name)
894356b3 4235 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4236 if (SvPOK(cv))
cea2e8a9 4237 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4238 sv_catpv(msg, " vs ");
4239 if (p)
cea2e8a9 4240 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4241 else
4242 sv_catpv(msg, "none");
894356b3 4243 Perl_warner(aTHX_ WARN_UNSAFE, "%"SVf, msg);
3fe9a6f1 4244 }
4245}
4246
760ac839 4247SV *
864dbfa3 4248Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4249{
54310121 4250 if (!cv || !SvPOK(cv) || SvCUR(cv))
4251 return Nullsv;
fe5e78ed
GS		 4252 return op_const_sv(CvSTART(cv), cv);
4253}
760ac839 4254
fe5e78ed 4255SV *
864dbfa3 4256Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4257{
4258 SV *sv = Nullsv;
4259
0f79a09d 4260 if (!o)
fe5e78ed
GS		 4261 return Nullsv;
4262
0f79a09d 4263 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4264 o = cLISTOPo->op_first->op_sibling;
4265
4266 for (; o; o = o->op_next) {
54310121 4267 OPCODE type = o->op_type;
fe5e78ed 4268
acb36ea4 4269 if (sv && o->op_next == o)
fe5e78ed 4270 return sv;
54310121 4271 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4272 continue;
4273 if (type == OP_LEAVESUB || type == OP_RETURN)
4274 break;
4275 if (sv)
4276 return Nullsv;
7766f137 4277 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4278 sv = cSVOPo->op_sv;
7766f137 4279 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4280 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4281 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4282 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4283 return Nullsv;
760ac839 4284 }
54310121 4285 else
4286 return Nullsv;
760ac839 4287 }
5aabfad6 4288 if (sv)
4289 SvREADONLY_on(sv);
760ac839
LW		 4290 return sv;
4291}
4292
09bef843
SB		 4293void
4294Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4295{
4296 if (o)
4297 SAVEFREEOP(o);
4298 if (proto)
4299 SAVEFREEOP(proto);
4300 if (attrs)
4301 SAVEFREEOP(attrs);
4302 if (block)
4303 SAVEFREEOP(block);
4304 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4305}
4306
748a9306 4307CV *
864dbfa3 4308Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4309{
09bef843
SB		 4310 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4311}
4312
4313CV *
4314Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4315{
11343788 4316 dTHR;
2d8e6c8d 4317 STRLEN n_a;
83ee9e09
GS		 4318 char *name;
4319 char *aname;
4320 GV *gv;
2d8e6c8d 4321 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4322 register CV *cv=0;
a0d0e21e 4323 I32 ix;
79072805 4324
83ee9e09
GS		 4325 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4326 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4327 SV *sv = sv_newmortal();
4328 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4329 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4330 aname = SvPVX(sv);
4331 }
4332 else
4333 aname = Nullch;
4334 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4335 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4336 SVt_PVCV);
4337
11343788 4338 if (o)
5dc0d613 4339 SAVEFREEOP(o);
3fe9a6f1 4340 if (proto)
4341 SAVEFREEOP(proto);
09bef843
SB		 4342 if (attrs)
4343 SAVEFREEOP(attrs);
3fe9a6f1 4344
09bef843 4345 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4346 maximum a prototype before. */
4347 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4348 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4349 && ckWARN_d(WARN_UNSAFE))
4350 {
0453d815 4351 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4352 }
55d729e4
GS		 4353 cv_ckproto((CV*)gv, NULL, ps);
4354 }
4355 if (ps)
4356 sv_setpv((SV*)gv, ps);
4357 else
4358 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4359 SvREFCNT_dec(PL_compcv);
4360 cv = PL_compcv = NULL;
4361 PL_sub_generation++;
55d729e4
GS		 4362 goto noblock;
4363 }
4364
68dc0745 4365 if (!name || GvCVGEN(gv))
4366 cv = Nullcv;
4367 else if (cv = GvCV(gv)) {
3fe9a6f1 4368 cv_ckproto(cv, gv, ps);
68dc0745 4369 /* already defined (or promised)? */
4370 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4371 SV* const_sv;
fe5e78ed 4372 bool const_changed = TRUE;
09bef843 4373 if (!block && !attrs) {
aa689395 4374 /* just a "sub foo;" when &foo is already defined */
3280af22 4375 SAVEFREESV(PL_compcv);
aa689395 4376 goto done;
4377 }
7bac28a0 4378 /* ahem, death to those who redefine active sort subs */
3280af22 4379 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4380 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4381 if (!block)
4382 goto withattrs;
0f79a09d 4383 if (const_sv = cv_const_sv(cv))
fe5e78ed 4384 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4385 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4386 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4387 && HvNAME(GvSTASH(CvGV(cv)))
4388 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
83ee9e09
GS		 4389 "autouse")))
4390 {
57843af0
GS		 4391 line_t oldline = CopLINE(PL_curcop);
4392 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4393 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4394 const_sv ? "Constant subroutine %s redefined"
09bef843 4395 : "Subroutine %s redefined", name);
57843af0 4396 CopLINE_set(PL_curcop, oldline);
79072805 4397 }
8990e307 4398 SvREFCNT_dec(cv);
68dc0745 4399 cv = Nullcv;
79072805
LW		 4400 }
4401 }
09bef843
SB		 4402 withattrs:
4403 if (attrs) {
4404 HV *stash;
4405 SV *rcv;
4406
4407 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4408 * before we clobber PL_compcv.
4409 */
4410 if (cv && !block) {
4411 rcv = (SV*)cv;
4412 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4413 stash = GvSTASH(CvGV(cv));
4414 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4415 stash = CvSTASH(cv);
4416 else
4417 stash = PL_curstash;
4418 }
4419 else {
4420 /* possibly about to re-define existing subr -- ignore old cv */
4421 rcv = (SV*)PL_compcv;
4422 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4423 stash = GvSTASH(gv);
4424 else
4425 stash = PL_curstash;
4426 }
4427 apply_attrs(stash, rcv, attrs);
4428 }
a0d0e21e 4429 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4430 if (!block) {
4431 /* got here with just attrs -- work done, so bug out */
4432 SAVEFREESV(PL_compcv);
4433 goto done;
4434 }
4633a7c4 4435 cv_undef(cv);
3280af22
NIS		 4436 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4437 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4438 CvOUTSIDE(PL_compcv) = 0;
4439 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4440 CvPADLIST(PL_compcv) = 0;
4441 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4442 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4443 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4444 }
4445 else {
3280af22 4446 cv = PL_compcv;
44a8e56a 4447 if (name) {
4448 GvCV(gv) = cv;
4449 GvCVGEN(gv) = 0;
3280af22 4450 PL_sub_generation++;
44a8e56a 4451 }
a0d0e21e 4452 }
44a8e56a 4453 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4454 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4455 CvSTASH(cv) = PL_curstash;
11343788
MB		 4456#ifdef USE_THREADS
4457 CvOWNER(cv) = 0;
1cfa4ec7 4458 if (!CvMUTEXP(cv)) {
f6aaf501 4459 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4460 MUTEX_INIT(CvMUTEXP(cv));
4461 }
11343788 4462#endif /* USE_THREADS */
8990e307 4463
3fe9a6f1 4464 if (ps)
4465 sv_setpv((SV*)cv, ps);
4633a7c4 4466
3280af22 4467 if (PL_error_count) {
c07a80fd 4468 op_free(block);
4469 block = Nullop;
68dc0745 4470 if (name) {
4471 char *s = strrchr(name, ':');
4472 s = s ? s+1 : name;
6d4c2119
CS		 4473 if (strEQ(s, "BEGIN")) {
4474 char *not_safe =
4475 "BEGIN not safe after errors--compilation aborted";
faef0170 4476 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4477 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4478 else {
4479 /* force display of errors found but not reported */
38a03e6e 4480 sv_catpv(ERRSV, not_safe);
cea2e8a9 4481 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4482 }
4483 }
68dc0745 4484 }
c07a80fd 4485 }
a0d0e21e 4486 if (!block) {
55d729e4 4487 noblock:
3280af22 4488 PL_copline = NOLINE;
a0d0e21e
LW		 4489 LEAVE_SCOPE(floor);
4490 return cv;
4491 }
4492
3280af22
NIS		 4493 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4494 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4495
7766f137
GS		 4496 if (CvLVALUE(cv)) {
4497 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4498 }
4499 else {
4500 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4501 }
4502 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4503 OpREFCNT_set(CvROOT(cv), 1);
4504 CvSTART(cv) = LINKLIST(CvROOT(cv));
4505 CvROOT(cv)->op_next = 0;
4506 peep(CvSTART(cv));
4507
4508 /* now that optimizer has done its work, adjust pad values */
54310121 4509 if (CvCLONE(cv)) {
3280af22
NIS		 4510 SV **namep = AvARRAY(PL_comppad_name);
4511 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4512 SV *namesv;
4513
7766f137 4514 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4515 continue;
4516 /*
4517 * The only things that a clonable function needs in its
4518 * pad are references to outer lexicals and anonymous subs.
4519 * The rest are created anew during cloning.
4520 */
4521 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4522 namesv != &PL_sv_undef &&
54310121 4523 (SvFAKE(namesv) ||
4524 *SvPVX(namesv) == '&')))
4525 {
3280af22
NIS		 4526 SvREFCNT_dec(PL_curpad[ix]);
4527 PL_curpad[ix] = Nullsv;
54310121 4528 }
4529 }
a0d0e21e 4530 }
54310121 4531 else {
4532 AV *av = newAV(); /* Will be @_ */
4533 av_extend(av, 0);
3280af22 4534 av_store(PL_comppad, 0, (SV*)av);
54310121 4535 AvFLAGS(av) = AVf_REIFY;
79072805 4536
3280af22 4537 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4538 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4539 continue;
3280af22
NIS		 4540 if (!SvPADMY(PL_curpad[ix]))
4541 SvPADTMP_on(PL_curpad[ix]);
54310121 4542 }
4543 }
79072805 4544
83ee9e09 4545 if (name || aname) {
44a8e56a 4546 char *s;
83ee9e09 4547 char *tname = (name ? name : aname);
44a8e56a 4548
3280af22 4549 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4550 SV *sv = NEWSV(0,0);
44a8e56a 4551 SV *tmpstr = sv_newmortal();
549bb64a 4552 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4553 CV *pcv;
44a8e56a 4554 HV *hv;
83ee9e09 4555 char *t;
44a8e56a 4556
ed094faf
GS		 4557 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4558 CopFILE(PL_curcop),
cc49e20b 4559 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4560 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4561 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4562 hv = GvHVn(db_postponed);
9607fc9c 4563 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4564 && (pcv = GvCV(db_postponed)))
4565 {
44a8e56a 4566 dSP;
924508f0 4567 PUSHMARK(SP);
44a8e56a 4568 XPUSHs(tmpstr);
4569 PUTBACK;
83ee9e09 4570 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4571 }
4572 }
79072805 4573
83ee9e09 4574 if ((s = strrchr(tname,':')))
28757baa 4575 s++;
4576 else
83ee9e09 4577 s = tname;
ed094faf 4578
7d30b5c4 4579 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4580 goto done;
4581
68dc0745 4582 if (strEQ(s, "BEGIN")) {
3280af22 4583 I32 oldscope = PL_scopestack_ix;
28757baa 4584 ENTER;
57843af0
GS		 4585 SAVECOPFILE(&PL_compiling);
4586 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4587 save_svref(&PL_rs);
4588 sv_setsv(PL_rs, PL_nrs);
28757baa 4589
3280af22
NIS		 4590 if (!PL_beginav)
4591 PL_beginav = newAV();
28757baa 4592 DEBUG_x( dump_sub(gv) );
ed094faf 4593 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4594 GvCV(gv) = 0;
3280af22 4595 call_list(oldscope, PL_beginav);
a6006777 4596
3280af22 4597 PL_curcop = &PL_compiling;
a0ed51b3 4598 PL_compiling.op_private = PL_hints;
28757baa 4599 LEAVE;
4600 }
3280af22
NIS		 4601 else if (strEQ(s, "END") && !PL_error_count) {
4602 if (!PL_endav)
4603 PL_endav = newAV();
ed094faf 4604 DEBUG_x( dump_sub(gv) );
3280af22 4605 av_unshift(PL_endav, 1);
ed094faf 4606 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4607 GvCV(gv) = 0;
4608 }
7d30b5c4
GS		 4609 else if (strEQ(s, "CHECK") && !PL_error_count) {
4610 if (!PL_checkav)
4611 PL_checkav = newAV();
ed094faf 4612 DEBUG_x( dump_sub(gv) );
7d30b5c4
GS		 4613 av_unshift(PL_checkav, 1);
4614 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4615 GvCV(gv) = 0;
4616 }
3280af22
NIS		 4617 else if (strEQ(s, "INIT") && !PL_error_count) {
4618 if (!PL_initav)
4619 PL_initav = newAV();
ed094faf 4620 DEBUG_x( dump_sub(gv) );
3280af22 4621 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4622 GvCV(gv) = 0;
ae77835f 4623 }
79072805 4624 }
a6006777 4625
aa689395 4626 done:
3280af22 4627 PL_copline = NOLINE;
8990e307 4628 LEAVE_SCOPE(floor);
a0d0e21e 4629 return cv;
79072805
LW		 4630}
4631
b099ddc0 4632/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4633/*
4634=for apidoc newCONSTSUB
4635
4636Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4637eligible for inlining at compile-time.
4638
4639=cut
4640*/
4641
5476c433 4642void
864dbfa3 4643Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4644{
4645 dTHR;
5476c433 4646
11faa288
GS		 4647 ENTER;
4648 SAVECOPLINE(PL_curcop);
4649 SAVEHINTS();
4650
4651 CopLINE_set(PL_curcop, PL_copline);
3280af22 4652 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4653
4654 if (stash) {
4655 SAVESPTR(PL_curstash);
4656 SAVECOPSTASH(PL_curcop);
4657 PL_curstash = stash;
4658#ifdef USE_ITHREADS
4659 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4660#else
4661 CopSTASH(PL_curcop) = stash;
4662#endif
4663 }
5476c433 4664
09bef843 4665 newATTRSUB(
be24f278 4666 start_subparse(FALSE, 0),
5476c433 4667 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4668 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4669 Nullop,
5476c433
JD		 4670 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4671 );
4672
11faa288 4673 LEAVE;
5476c433
JD		 4674}
4675
954c1994
GS		 4676/*
4677=for apidoc U||newXS
4678
4679Used by C<xsubpp> to hook up XSUBs as Perl subs.
4680
4681=cut
4682*/
4683
57d3b86d 4684CV *
864dbfa3 4685Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4686{
11343788 4687 dTHR;
44a8e56a 4688 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4689 register CV *cv;
44a8e56a 4690
4691 if (cv = (name ? GvCV(gv) : Nullcv)) {
4692 if (GvCVGEN(gv)) {
4693 /* just a cached method */
4694 SvREFCNT_dec(cv);
4695 cv = 0;
4696 }
4697 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4698 /* already defined (or promised) */
599cee73 4699 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4700 && HvNAME(GvSTASH(CvGV(cv)))
4701 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4702 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4703 if (PL_copline != NOLINE)
57843af0 4704 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4705 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4706 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4707 }
4708 SvREFCNT_dec(cv);
4709 cv = 0;
79072805 4710 }
79072805 4711 }
44a8e56a 4712
4713 if (cv) /* must reuse cv if autoloaded */
4714 cv_undef(cv);
a0d0e21e
LW		 4715 else {
4716 cv = (CV*)NEWSV(1105,0);
4717 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4718 if (name) {
4719 GvCV(gv) = cv;
4720 GvCVGEN(gv) = 0;
3280af22 4721 PL_sub_generation++;
44a8e56a 4722 }
a0d0e21e 4723 }
5196be3e 4724 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4725#ifdef USE_THREADS
12ca11f6 4726 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4727 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4728 CvOWNER(cv) = 0;
4729#endif /* USE_THREADS */
b195d487 4730 (void)gv_fetchfile(filename);
57843af0
GS		 4731 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4732 an external constant string */
a0d0e21e 4733 CvXSUB(cv) = subaddr;
44a8e56a 4734
28757baa 4735 if (name) {
4736 char *s = strrchr(name,':');
4737 if (s)
4738 s++;
4739 else
4740 s = name;
ed094faf 4741
7d30b5c4 4742 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4743 goto done;
4744
28757baa 4745 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4746 if (!PL_beginav)
4747 PL_beginav = newAV();
ed094faf 4748 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4749 GvCV(gv) = 0;
28757baa 4750 }
4751 else if (strEQ(s, "END")) {
3280af22
NIS		 4752 if (!PL_endav)
4753 PL_endav = newAV();
4754 av_unshift(PL_endav, 1);
ed094faf 4755 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4756 GvCV(gv) = 0;
28757baa 4757 }
7d30b5c4
GS		 4758 else if (strEQ(s, "CHECK")) {
4759 if (!PL_checkav)
4760 PL_checkav = newAV();
4761 av_unshift(PL_checkav, 1);
4762 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4763 GvCV(gv) = 0;
4764 }
7d07dbc2 4765 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4766 if (!PL_initav)
4767 PL_initav = newAV();
ed094faf 4768 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4769 GvCV(gv) = 0;
ae77835f 4770 }
28757baa 4771 }
8990e307 4772 else
a5f75d66 4773 CvANON_on(cv);
44a8e56a 4774
ed094faf 4775done:
a0d0e21e 4776 return cv;
79072805
LW		 4777}
4778
4779void
864dbfa3 4780Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4781{
11343788 4782 dTHR;
79072805
LW		 4783 register CV *cv;
4784 char *name;
4785 GV *gv;
a0d0e21e 4786 I32 ix;
2d8e6c8d 4787 STRLEN n_a;
79072805 4788
11343788 4789 if (o)
2d8e6c8d 4790 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4791 else
4792 name = "STDOUT";
85e6fe83 4793 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4794 GvMULTI_on(gv);
79072805 4795 if (cv = GvFORM(gv)) {
599cee73 4796 if (ckWARN(WARN_REDEFINE)) {
57843af0 4797 line_t oldline = CopLINE(PL_curcop);
79072805 4798
57843af0 4799 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4800 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4801 CopLINE_set(PL_curcop, oldline);
79072805 4802 }
8990e307 4803 SvREFCNT_dec(cv);
79072805 4804 }
3280af22 4805 cv = PL_compcv;
79072805 4806 GvFORM(gv) = cv;
44a8e56a 4807 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4808 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4809
3280af22
NIS		 4810 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4811 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4812 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4813 }
4814
79072805 4815 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4816 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4817 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4818 CvSTART(cv) = LINKLIST(CvROOT(cv));
4819 CvROOT(cv)->op_next = 0;
4820 peep(CvSTART(cv));
11343788 4821 op_free(o);
3280af22 4822 PL_copline = NOLINE;
8990e307 4823 LEAVE_SCOPE(floor);
79072805
LW		 4824}
4825
4826OP *
864dbfa3 4827Perl_newANONLIST(pTHX_ OP *o)
79072805 4828{
93a17b20 4829 return newUNOP(OP_REFGEN, 0,
11343788 4830 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4831}
4832
4833OP *
864dbfa3 4834Perl_newANONHASH(pTHX_ OP *o)
79072805 4835{
93a17b20 4836 return newUNOP(OP_REFGEN, 0,
11343788 4837 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4838}
4839
4840OP *
864dbfa3 4841Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4842{
09bef843
SB		 4843 return newANONATTRSUB(floor, proto, Nullop, block);
4844}
4845
4846OP *
4847Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4848{
a0d0e21e 4849 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4850 newSVOP(OP_ANONCODE, 0,
4851 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4852}
4853
4854OP *
864dbfa3 4855Perl_oopsAV(pTHX_ OP *o)
79072805 4856{
ed6116ce
LW		 4857 switch (o->op_type) {
4858 case OP_PADSV:
4859 o->op_type = OP_PADAV;
22c35a8c 4860 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4861 return ref(o, OP_RV2AV);
ed6116ce
LW		 4862
4863 case OP_RV2SV:
79072805 4864 o->op_type = OP_RV2AV;
22c35a8c 4865 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4866 ref(o, OP_RV2AV);
ed6116ce
LW		 4867 break;
4868
4869 default:
0453d815
PM		 4870 if (ckWARN_d(WARN_INTERNAL))
4871 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4872 break;
4873 }
79072805
LW		 4874 return o;
4875}
4876
4877OP *
864dbfa3 4878Perl_oopsHV(pTHX_ OP *o)
79072805 4879{
0453d815 4880 dTHR;
0453d815 4881
ed6116ce
LW		 4882 switch (o->op_type) {
4883 case OP_PADSV:
4884 case OP_PADAV:
4885 o->op_type = OP_PADHV;
22c35a8c 4886 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4887 return ref(o, OP_RV2HV);
ed6116ce
LW		 4888
4889 case OP_RV2SV:
4890 case OP_RV2AV:
79072805 4891 o->op_type = OP_RV2HV;
22c35a8c 4892 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4893 ref(o, OP_RV2HV);
ed6116ce
LW		 4894 break;
4895
4896 default:
0453d815
PM		 4897 if (ckWARN_d(WARN_INTERNAL))
4898 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4899 break;
4900 }
79072805
LW		 4901 return o;
4902}
4903
4904OP *
864dbfa3 4905Perl_newAVREF(pTHX_ OP *o)
79072805 4906{
ed6116ce
LW		 4907 if (o->op_type == OP_PADANY) {
4908 o->op_type = OP_PADAV;
22c35a8c 4909 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4910 return o;
ed6116ce 4911 }
79072805
LW		 4912 return newUNOP(OP_RV2AV, 0, scalar(o));
4913}
4914
4915OP *
864dbfa3 4916Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4917{
82092f1d 4918 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4919 return newUNOP(OP_NULL, 0, o);
748a9306 4920 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4921}
4922
4923OP *
864dbfa3 4924Perl_newHVREF(pTHX_ OP *o)
79072805 4925{
ed6116ce
LW		 4926 if (o->op_type == OP_PADANY) {
4927 o->op_type = OP_PADHV;
22c35a8c 4928 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4929 return o;
ed6116ce 4930 }
79072805
LW		 4931 return newUNOP(OP_RV2HV, 0, scalar(o));
4932}
4933
4934OP *
864dbfa3 4935Perl_oopsCV(pTHX_ OP *o)
79072805 4936{
cea2e8a9 4937 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4938 /* STUB */
4939 return o;
4940}
4941
4942OP *
864dbfa3 4943Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4944{
c07a80fd 4945 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4946}
4947
4948OP *
864dbfa3 4949Perl_newSVREF(pTHX_ OP *o)
79072805 4950{
ed6116ce
LW		 4951 if (o->op_type == OP_PADANY) {
4952 o->op_type = OP_PADSV;
22c35a8c 4953 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4954 return o;
ed6116ce 4955 }
224a4551
MB		 4956 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4957 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4958 return o;
224a4551 4959 }
79072805
LW		 4960 return newUNOP(OP_RV2SV, 0, scalar(o));
4961}
4962
4963/* Check routines. */
4964
4965OP *
cea2e8a9 4966Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4967{
178c6305
CS		 4968 PADOFFSET ix;
4969 SV* name;
4970
4971 name = NEWSV(1106,0);
4972 sv_upgrade(name, SVt_PVNV);
4973 sv_setpvn(name, "&", 1);
4974 SvIVX(name) = -1;
4975 SvNVX(name) = 1;
5dc0d613 4976 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4977 av_store(PL_comppad_name, ix, name);
4978 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4979 SvPADMY_on(cSVOPo->op_sv);
4980 cSVOPo->op_sv = Nullsv;
4981 cSVOPo->op_targ = ix;
4982 return o;
5f05dabc 4983}
4984
4985OP *
cea2e8a9 4986Perl_ck_bitop(pTHX_ OP *o)
55497cff 4987{
3280af22 4988 o->op_private = PL_hints;
5dc0d613 4989 return o;
55497cff 4990}
4991
4992OP *
cea2e8a9 4993Perl_ck_concat(pTHX_ OP *o)
79072805 4994{
11343788
MB		 4995 if (cUNOPo->op_first->op_type == OP_CONCAT)
4996 o->op_flags |= OPf_STACKED;
4997 return o;
79072805
LW		 4998}
4999
5000OP *
cea2e8a9 5001Perl_ck_spair(pTHX_ OP *o)
79072805 5002{
11343788 5003 if (o->op_flags & OPf_KIDS) {
79072805 5004 OP* newop;
a0d0e21e 5005 OP* kid;
5dc0d613
MB		 5006 OPCODE type = o->op_type;
5007 o = modkids(ck_fun(o), type);
11343788 5008 kid = cUNOPo->op_first;
a0d0e21e
LW		 5009 newop = kUNOP->op_first->op_sibling;
5010 if (newop &&
5011 (newop->op_sibling ||
22c35a8c 5012 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5013 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5014 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5015
11343788 5016 return o;
a0d0e21e
LW		 5017 }
5018 op_free(kUNOP->op_first);
5019 kUNOP->op_first = newop;
5020 }
22c35a8c 5021 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5022 return ck_fun(o);
a0d0e21e
LW		 5023}
5024
5025OP *
cea2e8a9 5026Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5027{
11343788 5028 o = ck_fun(o);
5dc0d613 5029 o->op_private = 0;
11343788
MB		 5030 if (o->op_flags & OPf_KIDS) {
5031 OP *kid = cUNOPo->op_first;
01020589
GS		 5032 switch (kid->op_type) {
5033 case OP_ASLICE:
5034 o->op_flags |= OPf_SPECIAL;
5035 /* FALL THROUGH */
5036 case OP_HSLICE:
5dc0d613 5037 o->op_private |= OPpSLICE;
01020589
GS		 5038 break;
5039 case OP_AELEM:
5040 o->op_flags |= OPf_SPECIAL;
5041 /* FALL THROUGH */
5042 case OP_HELEM:
5043 break;
5044 default:
5045 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5046 PL_op_desc[o->op_type]);
01020589 5047 }
a0d0e21e 5048 null(kid);
79072805 5049 }
11343788 5050 return o;
79072805
LW		 5051}
5052
5053OP *
cea2e8a9 5054Perl_ck_eof(pTHX_ OP *o)
79072805 5055{
11343788 5056 I32 type = o->op_type;
79072805 5057
11343788
MB		 5058 if (o->op_flags & OPf_KIDS) {
5059 if (cLISTOPo->op_first->op_type == OP_STUB) {
5060 op_free(o);
5061 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5062 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5063 }
11343788 5064 return ck_fun(o);
79072805 5065 }
11343788 5066 return o;
79072805
LW		 5067}
5068
5069OP *
cea2e8a9 5070Perl_ck_eval(pTHX_ OP *o)
79072805 5071{
3280af22 5072 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5073 if (o->op_flags & OPf_KIDS) {
5074 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5075
93a17b20 5076 if (!kid) {
11343788
MB		 5077 o->op_flags &= ~OPf_KIDS;
5078 null(o);
79072805
LW		 5079 }
5080 else if (kid->op_type == OP_LINESEQ) {
5081 LOGOP *enter;
5082
11343788
MB		 5083 kid->op_next = o->op_next;
5084 cUNOPo->op_first = 0;
5085 op_free(o);
79072805 5086
b7dc083c 5087 NewOp(1101, enter, 1, LOGOP);
79072805 5088 enter->op_type = OP_ENTERTRY;
22c35a8c 5089 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5090 enter->op_private = 0;
5091
5092 /* establish postfix order */
5093 enter->op_next = (OP*)enter;
5094
11343788
MB		 5095 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5096 o->op_type = OP_LEAVETRY;
22c35a8c 5097 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5098 enter->op_other = o;
5099 return o;
79072805 5100 }
c7cc6f1c 5101 else
473986ff 5102 scalar((OP*)kid);
79072805
LW		 5103 }
5104 else {
11343788 5105 op_free(o);
54b9620d 5106 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5107 }
3280af22 5108 o->op_targ = (PADOFFSET)PL_hints;
11343788 5109 return o;
79072805
LW		 5110}
5111
5112OP *
cea2e8a9 5113Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5114{
5115 OP *kid;
11343788
MB		 5116 if (o->op_flags & OPf_STACKED) {
5117 o = ck_fun(o);
5118 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5119 if (kid->op_type == OP_RV2GV)
5120 null(kid);
79072805 5121 }
463ee0b2 5122 else
11343788
MB		 5123 o = listkids(o);
5124 return o;
79072805
LW		 5125}
5126
5127OP *
cea2e8a9 5128Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5129{
5196be3e
MB		 5130 o = ck_fun(o);
5131 if (o->op_flags & OPf_KIDS) {
5132 OP *kid = cUNOPo->op_first;
afebc493
GS		 5133 if (kid->op_type == OP_ENTERSUB) {
5134 (void) ref(kid, o->op_type);
5135 if (kid->op_type != OP_RV2CV && !PL_error_count)
5136 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5137 PL_op_desc[o->op_type]);
5138 o->op_private |= OPpEXISTS_SUB;
5139 }
5140 else if (kid->op_type == OP_AELEM)
01020589
GS		 5141 o->op_flags |= OPf_SPECIAL;
5142 else if (kid->op_type != OP_HELEM)
5143 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5144 PL_op_desc[o->op_type]);
5f05dabc 5145 null(kid);
5146 }
5196be3e 5147 return o;
5f05dabc 5148}
5149
22c35a8c 5150#if 0
5f05dabc 5151OP *
cea2e8a9 5152Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5153{
5154 o = fold_constants(o);
5155 if (o->op_type == OP_CONST)
5156 o->op_type = OP_GV;
5157 return o;
5158}
22c35a8c 5159#endif
79072805
LW		 5160
5161OP *
cea2e8a9 5162Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5163{
11343788
MB		 5164 dTHR;
5165 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5166
3280af22 5167 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5168 if (kid->op_type == OP_CONST) {
44a8e56a 5169 char *name;
5170 int iscv;
5171 GV *gv;
779c5bc9 5172 SV *kidsv = kid->op_sv;
2d8e6c8d 5173 STRLEN n_a;
44a8e56a 5174
779c5bc9
GS		 5175 /* Is it a constant from cv_const_sv()? */
5176 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5177 SV *rsv = SvRV(kidsv);
5178 int svtype = SvTYPE(rsv);
5179 char *badtype = Nullch;
5180
5181 switch (o->op_type) {
5182 case OP_RV2SV:
5183 if (svtype > SVt_PVMG)
5184 badtype = "a SCALAR";
5185 break;
5186 case OP_RV2AV:
5187 if (svtype != SVt_PVAV)
5188 badtype = "an ARRAY";
5189 break;
5190 case OP_RV2HV:
5191 if (svtype != SVt_PVHV) {
5192 if (svtype == SVt_PVAV) { /* pseudohash? */
5193 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5194 if (ksv && SvROK(*ksv)
5195 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5196 {
5197 break;
5198 }
5199 }
5200 badtype = "a HASH";
5201 }
5202 break;
5203 case OP_RV2CV:
5204 if (svtype != SVt_PVCV)
5205 badtype = "a CODE";
5206 break;
5207 }
5208 if (badtype)
cea2e8a9 5209 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5210 return o;
5211 }
2d8e6c8d 5212 name = SvPV(kidsv, n_a);
3280af22 5213 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5214 char *badthing = Nullch;
5dc0d613 5215 switch (o->op_type) {
44a8e56a 5216 case OP_RV2SV:
5217 badthing = "a SCALAR";
5218 break;
5219 case OP_RV2AV:
5220 badthing = "an ARRAY";
5221 break;
5222 case OP_RV2HV:
5223 badthing = "a HASH";
5224 break;
5225 }
5226 if (badthing)
cea2e8a9 5227 Perl_croak(aTHX_
44a8e56a 5228 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5229 name, badthing);
5230 }
93233ece
CS		 5231 /*
5232 * This is a little tricky. We only want to add the symbol if we
5233 * didn't add it in the lexer. Otherwise we get duplicate strict
5234 * warnings. But if we didn't add it in the lexer, we must at
5235 * least pretend like we wanted to add it even if it existed before,
5236 * or we get possible typo warnings. OPpCONST_ENTERED says
5237 * whether the lexer already added THIS instance of this symbol.
5238 */
5196be3e 5239 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5240 do {
44a8e56a 5241 gv = gv_fetchpv(name,
748a9306 5242 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5243 iscv
5244 ? SVt_PVCV
11343788 5245 : o->op_type == OP_RV2SV
a0d0e21e 5246 ? SVt_PV
11343788 5247 : o->op_type == OP_RV2AV
a0d0e21e 5248 ? SVt_PVAV
11343788 5249 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5250 ? SVt_PVHV
5251 : SVt_PVGV);
93233ece
CS		 5252 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5253 if (gv) {
5254 kid->op_type = OP_GV;
5255 SvREFCNT_dec(kid->op_sv);
350de78d 5256#ifdef USE_ITHREADS
638eceb6 5257 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5258 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5259 GvIN_PAD_on(gv);
350de78d
GS		 5260 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5261#else
93233ece 5262 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5263#endif
76cd736e 5264 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5265 }
79072805 5266 }
11343788 5267 return o;
79072805
LW		 5268}
5269
5270OP *
cea2e8a9 5271Perl_ck_ftst(pTHX_ OP *o)
79072805 5272{
11343788
MB		 5273 dTHR;
5274 I32 type = o->op_type;
79072805 5275
d0dca557
JD		 5276 if (o->op_flags & OPf_REF) {
5277 /* nothing */
5278 }
5279 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5280 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5281
5282 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5283 STRLEN n_a;
a0d0e21e 5284 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5285 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5286 op_free(o);
d0dca557 5287 o = newop;
79072805
LW		 5288 }
5289 }
5290 else {
11343788 5291 op_free(o);
79072805 5292 if (type == OP_FTTTY)
d0dca557 5293 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5294 SVt_PVIO));
79072805 5295 else
d0dca557 5296 o = newUNOP(type, 0, newDEFSVOP());
79072805 5297 }
d0dca557
JD		 5298#ifdef USE_LOCALE
5299 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5300 o->op_private = 0;
5301 if (PL_hints & HINT_LOCALE)
5302 o->op_private |= OPpLOCALE;
5303 }
5304#endif
11343788 5305 return o;
79072805
LW		 5306}
5307
5308OP *
cea2e8a9 5309Perl_ck_fun(pTHX_ OP *o)
79072805 5310{
11343788 5311 dTHR;
79072805
LW		 5312 register OP *kid;
5313 OP **tokid;
5314 OP *sibl;
5315 I32 numargs = 0;
11343788 5316 int type = o->op_type;
22c35a8c 5317 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5318
11343788 5319 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5320 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5321 oa &= ~OA_OPTIONAL;
5322 else
11343788 5323 return no_fh_allowed(o);
79072805
LW		 5324 }
5325
11343788 5326 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5327 STRLEN n_a;
11343788
MB		 5328 tokid = &cLISTOPo->op_first;
5329 kid = cLISTOPo->op_first;
8990e307
LW		 5330 if (kid->op_type == OP_PUSHMARK ||
5331 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
5332 {
79072805
LW		 5333 tokid = &kid->op_sibling;
5334 kid = kid->op_sibling;
5335 }
22c35a8c 5336 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5337 *tokid = kid = newDEFSVOP();
79072805
LW		 5338
5339 while (oa && kid) {
5340 numargs++;
5341 sibl = kid->op_sibling;
5342 switch (oa & 7) {
5343 case OA_SCALAR:
62c18ce2
GS		 5344 /* list seen where single (scalar) arg expected? */
5345 if (numargs == 1 && !(oa >> 4)
5346 && kid->op_type == OP_LIST && type != OP_SCALAR)
5347 {
5348 return too_many_arguments(o,PL_op_desc[type]);
5349 }
79072805
LW		 5350 scalar(kid);
5351 break;
5352 case OA_LIST:
5353 if (oa < 16) {
5354 kid = 0;
5355 continue;
5356 }
5357 else
5358 list(kid);
5359 break;
5360 case OA_AVREF:
5361 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5362 (kid->op_private & OPpCONST_BARE))
5363 {
2d8e6c8d 5364 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5365 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5366 gv_fetchpv(name, TRUE, SVt_PVAV) ));
b9c39e73 5367 if (ckWARN(WARN_SYNTAX))
cf2093f6 5368 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5369 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5370 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5371 op_free(kid);
5372 kid = newop;
5373 kid->op_sibling = sibl;
5374 *tokid = kid;
5375 }
8990e307 5376 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5377 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5378 mod(kid, type);
79072805
LW		 5379 break;
5380 case OA_HVREF:
5381 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5382 (kid->op_private & OPpCONST_BARE))
5383 {
2d8e6c8d 5384 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5385 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5386 gv_fetchpv(name, TRUE, SVt_PVHV) ));
b9c39e73 5387 if (ckWARN(WARN_SYNTAX))
cf2093f6 5388 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5389 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5390 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5391 op_free(kid);
5392 kid = newop;
5393 kid->op_sibling = sibl;
5394 *tokid = kid;
5395 }
8990e307 5396 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5397 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5398 mod(kid, type);
79072805
LW		 5399 break;
5400 case OA_CVREF:
5401 {
a0d0e21e 5402 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5403 kid->op_sibling = 0;
5404 linklist(kid);
5405 newop->op_next = newop;
5406 kid = newop;
5407 kid->op_sibling = sibl;
5408 *tokid = kid;
5409 }
5410 break;
5411 case OA_FILEREF:
c340be78 5412 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5413 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5414 (kid->op_private & OPpCONST_BARE))
5415 {
79072805 5416 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5417 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5418 SVt_PVIO) );
79072805
LW		 5419 op_free(kid);
5420 kid = newop;
5421 }
1ea32a52
GS		 5422 else if (kid->op_type == OP_READLINE) {
5423 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5424 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5425 }
79072805 5426 else {
35cd451c 5427 I32 flags = OPf_SPECIAL;
a6c40364 5428 I32 priv = 0;
2c8ac474
GS		 5429 PADOFFSET targ = 0;
5430
35cd451c 5431 /* is this op a FH constructor? */
853846ea 5432 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5433 char *name = Nullch;
5434 STRLEN len;
5435
5436 flags = 0;
5437 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5438 * need to "prove" flag does not mean something
5439 * else already - NI-S 1999/05/07
2c8ac474
GS		 5440 */
5441 priv = OPpDEREF;
5442 if (kid->op_type == OP_PADSV) {
5443 SV **namep = av_fetch(PL_comppad_name,
5444 kid->op_targ, 4);
5445 if (namep && *namep)
5446 name = SvPV(*namep, len);
5447 }
5448 else if (kid->op_type == OP_RV2SV
5449 && kUNOP->op_first->op_type == OP_GV)
5450 {
5451 GV *gv = cGVOPx_gv(kUNOP->op_first);
5452 name = GvNAME(gv);
5453 len = GvNAMELEN(gv);
5454 }
5455 if (name) {
5456 SV *namesv;
5457 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5458 namesv = PL_curpad[targ];
5459 SvUPGRADE(namesv, SVt_PV);
5460 if (*name != '$')
5461 sv_setpvn(namesv, "$", 1);
5462 sv_catpvn(namesv, name, len);
5463 }
853846ea 5464 }
79072805 5465 kid->op_sibling = 0;
35cd451c 5466 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5467 kid->op_targ = targ;
5468 kid->op_private |= priv;
79072805
LW		 5469 }
5470 kid->op_sibling = sibl;
5471 *tokid = kid;
5472 }
5473 scalar(kid);
5474 break;
5475 case OA_SCALARREF:
a0d0e21e 5476 mod(scalar(kid), type);
79072805
LW		 5477 break;
5478 }
5479 oa >>= 4;
5480 tokid = &kid->op_sibling;
5481 kid = kid->op_sibling;
5482 }
11343788 5483 o->op_private |= numargs;
79072805 5484 if (kid)
22c35a8c 5485 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5486 listkids(o);
79072805 5487 }
22c35a8c 5488 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5489 op_free(o);
54b9620d 5490 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5491 }
5492
79072805
LW		 5493 if (oa) {
5494 while (oa & OA_OPTIONAL)
5495 oa >>= 4;
5496 if (oa && oa != OA_LIST)
22c35a8c 5497 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5498 }
11343788 5499 return o;
79072805
LW		 5500}
5501
5502OP *
cea2e8a9 5503Perl_ck_glob(pTHX_ OP *o)
79072805 5504{
fb73857a 5505 GV *gv;
5506
1f2bfc8a 5507 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5508 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5509
5510 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5511 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5512
52bb0670 5513#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5514 /* XXX this can be tightened up and made more failsafe. */
5515 if (!gv) {
5516 OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
5517 modname->op_private |= OPpCONST_BARE;
5518 ENTER;
5519 utilize(1, start_subparse(FALSE, 0), Nullop, modname,
220398a0 5520 newSVOP(OP_CONST, 0, newSVpvn(":globally", 9)));
72b16652
GS		 5521 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5522 LEAVE;
5523 }
52bb0670 5524#endif /* PERL_EXTERNAL_GLOB */
72b16652 5525
b1cb66bf 5526 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5527 append_elem(OP_GLOB, o,
80252599 5528 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5529 o->op_type = OP_LIST;
22c35a8c 5530 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5531 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5532 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5533 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5534 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5535 scalar(newUNOP(OP_RV2CV, 0,
5536 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5537 o = newUNOP(OP_NULL, 0, ck_subr(o));
5538 o->op_targ = OP_GLOB; /* hint at what it used to be */
5539 return o;
b1cb66bf 5540 }
5541 gv = newGVgen("main");
a0d0e21e 5542 gv_IOadd(gv);
11343788
MB		 5543 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5544 scalarkids(o);
5545 return ck_fun(o);
79072805
LW		 5546}
5547
5548OP *
cea2e8a9 5549Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5550{
5551 LOGOP *gwop;
5552 OP *kid;
11343788 5553 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5554
22c35a8c 5555 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5556 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5557
11343788 5558 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5559 OP* k;
11343788
MB		 5560 o = ck_sort(o);
5561 kid = cLISTOPo->op_first->op_sibling;
5562 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5563 kid = k;
5564 }
5565 kid->op_next = (OP*)gwop;
11343788 5566 o->op_flags &= ~OPf_STACKED;
93a17b20 5567 }
11343788 5568 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5569 if (type == OP_MAPWHILE)
5570 list(kid);
5571 else
5572 scalar(kid);
11343788 5573 o = ck_fun(o);
3280af22 5574 if (PL_error_count)
11343788 5575 return o;
aeea060c 5576 kid = cLISTOPo->op_first->op_sibling;
79072805 5577 if (kid->op_type != OP_NULL)
cea2e8a9 5578 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5579 kid = kUNOP->op_first;
5580
a0d0e21e 5581 gwop->op_type = type;
22c35a8c 5582 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5583 gwop->op_first = listkids(o);
79072805
LW		 5584 gwop->op_flags |= OPf_KIDS;
5585 gwop->op_private = 1;
5586 gwop->op_other = LINKLIST(kid);
a0d0e21e 5587 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5588 kid->op_next = (OP*)gwop;
5589
11343788 5590 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5591 if (!kid || !kid->op_sibling)
22c35a8c 5592 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5593 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5594 mod(kid, OP_GREPSTART);
5595
79072805
LW		 5596 return (OP*)gwop;
5597}
5598
5599OP *
cea2e8a9 5600Perl_ck_index(pTHX_ OP *o)
79072805 5601{
11343788
MB		 5602 if (o->op_flags & OPf_KIDS) {
5603 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5604 if (kid)
5605 kid = kid->op_sibling; /* get past "big" */
79072805 5606 if (kid && kid->op_type == OP_CONST)
2779dcf1 5607 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5608 }
11343788 5609 return ck_fun(o);
79072805
LW		 5610}
5611
5612OP *
cea2e8a9 5613Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5614{
5615 /* XXX length optimization goes here */
11343788 5616 return ck_fun(o);
79072805
LW		 5617}
5618
5619OP *
cea2e8a9 5620Perl_ck_lfun(pTHX_ OP *o)
79072805 5621{
5dc0d613
MB		 5622 OPCODE type = o->op_type;
5623 return modkids(ck_fun(o), type);
79072805
LW		 5624}
5625
5626OP *
cea2e8a9 5627Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5628{
20ce7b12 5629 dTHR;
d0334bed
GS		 5630 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5631 switch (cUNOPo->op_first->op_type) {
5632 case OP_RV2AV:
7e291ef1 5633 break; /* Globals via GV can be undef */
d0334bed
GS		 5634 case OP_PADAV:
5635 case OP_AASSIGN: /* Is this a good idea? */
5636 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5637 "defined(@array) is deprecated");
d0334bed
GS		 5638 Perl_warner(aTHX_ WARN_DEPRECATED,
5639 "(Maybe you should just omit the defined()?)\n");
69794302 5640 break;
d0334bed 5641 case OP_RV2HV:
7e291ef1 5642 break; /* Globals via GV can be undef */
d0334bed
GS		 5643 case OP_PADHV:
5644 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5645 "defined(%%hash) is deprecated");
d0334bed
GS		 5646 Perl_warner(aTHX_ WARN_DEPRECATED,
5647 "(Maybe you should just omit the defined()?)\n");
5648 break;
5649 default:
5650 /* no warning */
5651 break;
5652 }
69794302
MJD		 5653 }
5654 return ck_rfun(o);
5655}
5656
5657OP *
cea2e8a9 5658Perl_ck_rfun(pTHX_ OP *o)
8990e307 5659{
5dc0d613
MB		 5660 OPCODE type = o->op_type;
5661 return refkids(ck_fun(o), type);
8990e307
LW		 5662}
5663
5664OP *
cea2e8a9 5665Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5666{
5667 register OP *kid;
aeea060c 5668
11343788 5669 kid = cLISTOPo->op_first;
79072805 5670 if (!kid) {
11343788
MB		 5671 o = force_list(o);
5672 kid = cLISTOPo->op_first;
79072805
LW		 5673 }
5674 if (kid->op_type == OP_PUSHMARK)
5675 kid = kid->op_sibling;
11343788 5676 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5677 kid = kid->op_sibling;
5678 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5679 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5680 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5681 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5682 cLISTOPo->op_first->op_sibling = kid;
5683 cLISTOPo->op_last = kid;
79072805
LW		 5684 kid = kid->op_sibling;
5685 }
5686 }
5687
5688 if (!kid)
54b9620d 5689 append_elem(o->op_type, o, newDEFSVOP());
79072805 5690
5dc0d613 5691 o = listkids(o);
bbce6d69 5692
5dc0d613 5693 o->op_private = 0;
36477c24 5694#ifdef USE_LOCALE
3280af22 5695 if (PL_hints & HINT_LOCALE)
5dc0d613 5696 o->op_private |= OPpLOCALE;
bbce6d69 5697#endif
5698
5dc0d613 5699 return o;
bbce6d69 5700}
5701
5702OP *
cea2e8a9 5703Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5704{
5dc0d613 5705 o = ck_fun(o);
bbce6d69 5706
5dc0d613 5707 o->op_private = 0;
36477c24 5708#ifdef USE_LOCALE
3280af22 5709 if (PL_hints & HINT_LOCALE)
5dc0d613 5710 o->op_private |= OPpLOCALE;
bbce6d69 5711#endif
5712
5dc0d613 5713 return o;
bbce6d69 5714}
5715
5716OP *
b162f9ea
IZ		 5717Perl_ck_sassign(pTHX_ OP *o)
5718{
5719 OP *kid = cLISTOPo->op_first;
5720 /* has a disposable target? */
5721 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5722 && !(kid->op_flags & OPf_STACKED))
5723 {
5724 OP *kkid = kid->op_sibling;
5725
5726 /* Can just relocate the target. */
2c2d71f5
JH		 5727 if (kkid && kkid->op_type == OP_PADSV
5728 && !(kkid->op_private & OPpLVAL_INTRO))
5729 {
b162f9ea 5730 kid->op_targ = kkid->op_targ;
743e66e6 5731 kkid->op_targ = 0;
b162f9ea
IZ		 5732 /* Now we do not need PADSV and SASSIGN. */
5733 kid->op_sibling = o->op_sibling; /* NULL */
5734 cLISTOPo->op_first = NULL;
5735 op_free(o);
5736 op_free(kkid);
5737 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5738 return kid;
5739 }
5740 }
5741 return o;
5742}
5743
5744OP *
cea2e8a9 5745Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5746{
5dc0d613 5747 o->op_private = 0;
36477c24 5748#ifdef USE_LOCALE
3280af22 5749 if (PL_hints & HINT_LOCALE)
5dc0d613 5750 o->op_private |= OPpLOCALE;
bbce6d69 5751#endif
36477c24 5752
5dc0d613 5753 return o;
79072805
LW		 5754}
5755
5756OP *
cea2e8a9 5757Perl_ck_match(pTHX_ OP *o)
79072805 5758{
5dc0d613 5759 o->op_private |= OPpRUNTIME;
11343788 5760 return o;
79072805
LW		 5761}
5762
5763OP *
f5d5a27c
CS		 5764Perl_ck_method(pTHX_ OP *o)
5765{
5766 OP *kid = cUNOPo->op_first;
5767 if (kid->op_type == OP_CONST) {
5768 SV* sv = kSVOP->op_sv;
5769 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5770 OP *cmop;
5771 sv_upgrade(sv, SVt_PVIV);
5772 SvIOK_on(sv);
5773 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5774 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5775 kSVOP->op_sv = Nullsv;
5776 op_free(o);
5777 return cmop;
5778 }
5779 }
5780 return o;
5781}
5782
5783OP *
cea2e8a9 5784Perl_ck_null(pTHX_ OP *o)
79072805 5785{
11343788 5786 return o;
79072805
LW		 5787}
5788
5789OP *
cea2e8a9 5790Perl_ck_repeat(pTHX_ OP *o)
79072805 5791{
11343788
MB		 5792 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5793 o->op_private |= OPpREPEAT_DOLIST;
5794 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5795 }
5796 else
11343788
MB		 5797 scalar(o);
5798 return o;
79072805
LW		 5799}
5800
5801OP *
cea2e8a9 5802Perl_ck_require(pTHX_ OP *o)
8990e307 5803{
11343788
MB		 5804 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5805 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5806
5807 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5808 char *s;
a0d0e21e
LW		 5809 for (s = SvPVX(kid->op_sv); *s; s++) {
5810 if (*s == ':' && s[1] == ':') {
5811 *s = '/';
1aef975c 5812 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5813 --SvCUR(kid->op_sv);
5814 }
8990e307 5815 }
a0d0e21e 5816 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5817 }
5818 }
11343788 5819 return ck_fun(o);
8990e307
LW		 5820}
5821
22c35a8c 5822#if 0
8990e307 5823OP *
cea2e8a9 5824Perl_ck_retarget(pTHX_ OP *o)
79072805 5825{
cea2e8a9 5826 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5827 /* STUB */
11343788 5828 return o;
79072805 5829}
22c35a8c 5830#endif
79072805
LW		 5831
5832OP *
cea2e8a9 5833Perl_ck_select(pTHX_ OP *o)
79072805 5834{
c07a80fd 5835 OP* kid;
11343788
MB		 5836 if (o->op_flags & OPf_KIDS) {
5837 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5838 if (kid && kid->op_sibling) {
11343788 5839 o->op_type = OP_SSELECT;
22c35a8c 5840 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5841 o = ck_fun(o);
5842 return fold_constants(o);
79072805
LW		 5843 }
5844 }
11343788
MB		 5845 o = ck_fun(o);
5846 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5847 if (kid && kid->op_type == OP_RV2GV)
5848 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5849 return o;
79072805
LW		 5850}
5851
5852OP *
cea2e8a9 5853Perl_ck_shift(pTHX_ OP *o)
79072805 5854{
11343788 5855 I32 type = o->op_type;
79072805 5856
11343788 5857 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5858 OP *argop;
5859
11343788 5860 op_free(o);
6d4ff0d2 5861#ifdef USE_THREADS
533c011a 5862 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5863 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5864 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5865 }
5866 else {
5867 argop = newUNOP(OP_RV2AV, 0,
5868 scalar(newGVOP(OP_GV, 0,
5869 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5870 }
5871#else
5872 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5873 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5874 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5875#endif /* USE_THREADS */
5876 return newUNOP(type, 0, scalar(argop));
79072805 5877 }
11343788 5878 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5879}
5880
5881OP *
cea2e8a9 5882Perl_ck_sort(pTHX_ OP *o)
79072805 5883{
5dc0d613 5884 o->op_private = 0;
36477c24 5885#ifdef USE_LOCALE
3280af22 5886 if (PL_hints & HINT_LOCALE)
5dc0d613 5887 o->op_private |= OPpLOCALE;
bbce6d69 5888#endif
5889
9ea6e965 5890 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5891 simplify_sort(o);
9c007264 5892 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5893 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5894 OP *k;
82092f1d 5895 kid = kUNOP->op_first; /* get past null */
79072805 5896
463ee0b2 5897 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5898 linklist(kid);
463ee0b2
LW		 5899 if (kid->op_type == OP_SCOPE) {
5900 k = kid->op_next;
5901 kid->op_next = 0;
79072805 5902 }
463ee0b2 5903 else if (kid->op_type == OP_LEAVE) {
11343788 5904 if (o->op_type == OP_SORT) {
748a9306
LW		 5905 null(kid); /* wipe out leave */
5906 kid->op_next = kid;
463ee0b2 5907
748a9306
LW		 5908 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5909 if (k->op_next == kid)
5910 k->op_next = 0;
5911 }
463ee0b2 5912 }
748a9306
LW		 5913 else
5914 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5915 k = kLISTOP->op_first;
463ee0b2 5916 }
a0d0e21e
LW		 5917 peep(k);
5918
11343788 5919 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5920 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5921 kid->op_next = kid;
5922 else
5923 kid->op_next = k;
11343788 5924 o->op_flags |= OPf_SPECIAL;
79072805 5925 }
c6e96bcb
GS		 5926 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5927 null(cLISTOPo->op_first->op_sibling);
79072805 5928 }
bbce6d69 5929
11343788 5930 return o;
79072805 5931}
bda4119b
GS		 5932
5933STATIC void
cea2e8a9 5934S_simplify_sort(pTHX_ OP *o)
9c007264 5935{
51a19bc0 5936 dTHR;
9c007264
JH		 5937 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5938 OP *k;
5939 int reversed;
350de78d 5940 GV *gv;
9c007264
JH		 5941 if (!(o->op_flags & OPf_STACKED))
5942 return;
9ea6e965
GS		 5943 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5944 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5945 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5946 if (kid->op_type != OP_SCOPE)
5947 return;
5948 kid = kLISTOP->op_last; /* get past scope */
5949 switch(kid->op_type) {
5950 case OP_NCMP:
5951 case OP_I_NCMP:
5952 case OP_SCMP:
5953 break;
5954 default:
5955 return;
5956 }
5957 k = kid; /* remember this node*/
5958 if (kBINOP->op_first->op_type != OP_RV2SV)
5959 return;
5960 kid = kBINOP->op_first; /* get past cmp */
5961 if (kUNOP->op_first->op_type != OP_GV)
5962 return;
5963 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5964 gv = kGVOP_gv;
350de78d 5965 if (GvSTASH(gv) != PL_curstash)
9c007264 5966 return;
350de78d 5967 if (strEQ(GvNAME(gv), "a"))
9c007264 5968 reversed = 0;
0f79a09d 5969 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 5970 reversed = 1;
5971 else
5972 return;
5973 kid = k; /* back to cmp */
5974 if (kBINOP->op_last->op_type != OP_RV2SV)
5975 return;
5976 kid = kBINOP->op_last; /* down to 2nd arg */
5977 if (kUNOP->op_first->op_type != OP_GV)
5978 return;
5979 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5980 gv = kGVOP_gv;
350de78d 5981 if (GvSTASH(gv) != PL_curstash
9c007264 5982 || ( reversed
350de78d
GS		 5983 ? strNE(GvNAME(gv), "a")
5984 : strNE(GvNAME(gv), "b")))
9c007264
JH		 5985 return;
5986 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5987 if (reversed)
5988 o->op_private |= OPpSORT_REVERSE;
5989 if (k->op_type == OP_NCMP)
5990 o->op_private |= OPpSORT_NUMERIC;
5991 if (k->op_type == OP_I_NCMP)
5992 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5993 kid = cLISTOPo->op_first->op_sibling;
5994 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5995 op_free(kid); /* then delete it */
5996 cLISTOPo->op_children--;
9c007264 5997}
79072805
LW		 5998
5999OP *
cea2e8a9 6000Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6001{
6002 register OP *kid;
aeea060c 6003
11343788
MB		 6004 if (o->op_flags & OPf_STACKED)
6005 return no_fh_allowed(o);
79072805 6006
11343788 6007 kid = cLISTOPo->op_first;
8990e307 6008 if (kid->op_type != OP_NULL)
cea2e8a9 6009 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6010 kid = kid->op_sibling;
11343788
MB		 6011 op_free(cLISTOPo->op_first);
6012 cLISTOPo->op_first = kid;
85e6fe83 6013 if (!kid) {
79cb57f6 6014 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6015 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6016 }
79072805
LW		 6017
6018 if (kid->op_type != OP_MATCH) {
6019 OP *sibl = kid->op_sibling;
463ee0b2 6020 kid->op_sibling = 0;
79072805 6021 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6022 if (cLISTOPo->op_first == cLISTOPo->op_last)
6023 cLISTOPo->op_last = kid;
6024 cLISTOPo->op_first = kid;
79072805
LW		 6025 kid->op_sibling = sibl;
6026 }
6027
6028 kid->op_type = OP_PUSHRE;
22c35a8c 6029 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6030 scalar(kid);
6031
6032 if (!kid->op_sibling)
54b9620d 6033 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6034
6035 kid = kid->op_sibling;
6036 scalar(kid);
6037
6038 if (!kid->op_sibling)
11343788 6039 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6040
6041 kid = kid->op_sibling;
6042 scalar(kid);
6043
6044 if (kid->op_sibling)
22c35a8c 6045 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6046
11343788 6047 return o;
79072805
LW		 6048}
6049
6050OP *
eb6e2d6f
GS		 6051Perl_ck_join(pTHX_ OP *o)
6052{
6053 if (ckWARN(WARN_SYNTAX)) {
6054 OP *kid = cLISTOPo->op_first->op_sibling;
6055 if (kid && kid->op_type == OP_MATCH) {
6056 char *pmstr = "STRING";
6057 if (kPMOP->op_pmregexp)
6058 pmstr = kPMOP->op_pmregexp->precomp;
6059 Perl_warner(aTHX_ WARN_SYNTAX,
6060 "/%s/ should probably be written as \"%s\"",
6061 pmstr, pmstr);
6062 }
6063 }
6064 return ck_fun(o);
6065}
6066
6067OP *
cea2e8a9 6068Perl_ck_subr(pTHX_ OP *o)
79072805 6069{
11343788
MB		 6070 dTHR;
6071 OP *prev = ((cUNOPo->op_first->op_sibling)
6072 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6073 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6074 OP *cvop;
6075 char *proto = 0;
6076 CV *cv = 0;
46fc3d4c 6077 GV *namegv = 0;
4633a7c4
LW		 6078 int optional = 0;
6079 I32 arg = 0;
2d8e6c8d 6080 STRLEN n_a;
4633a7c4 6081
d3011074 6082 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6083 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6084 if (cvop->op_type == OP_RV2CV) {
6085 SVOP* tmpop;
11343788 6086 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6087 null(cvop); /* disable rv2cv */
6088 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6089 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6090 GV *gv = cGVOPx_gv(tmpop);
350de78d 6091 cv = GvCVu(gv);
76cd736e
GS		 6092 if (!cv)
6093 tmpop->op_private |= OPpEARLY_CV;
6094 else if (SvPOK(cv)) {
350de78d 6095 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6096 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6097 }
4633a7c4
LW		 6098 }
6099 }
f5d5a27c 6100 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6101 if (o2->op_type == OP_CONST)
6102 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6103 else if (o2->op_type == OP_LIST) {
6104 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6105 if (o && o->op_type == OP_CONST)
6106 o->op_private &= ~OPpCONST_STRICT;
6107 }
7a52d87a 6108 }
3280af22
NIS		 6109 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6110 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6111 o->op_private |= OPpENTERSUB_DB;
6112 while (o2 != cvop) {
4633a7c4
LW		 6113 if (proto) {
6114 switch (*proto) {
6115 case '\0':
5dc0d613 6116 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6117 case ';':
6118 optional = 1;
6119 proto++;
6120 continue;
6121 case '$':
6122 proto++;
6123 arg++;
11343788 6124 scalar(o2);
4633a7c4
LW		 6125 break;
6126 case '%':
6127 case '@':
11343788 6128 list(o2);
4633a7c4
LW		 6129 arg++;
6130 break;
6131 case '&':
6132 proto++;
6133 arg++;
11343788 6134 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6135 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6136 break;
6137 case '*':
2ba6ecf4 6138 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6139 proto++;
6140 arg++;
11343788 6141 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6142 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6143 else if (o2->op_type == OP_CONST)
6144 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6145 else if (o2->op_type == OP_ENTERSUB) {
6146 /* accidental subroutine, revert to bareword */
6147 OP *gvop = ((UNOP*)o2)->op_first;
6148 if (gvop && gvop->op_type == OP_NULL) {
6149 gvop = ((UNOP*)gvop)->op_first;
6150 if (gvop) {
6151 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6152 ;
6153 if (gvop &&
6154 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6155 (gvop = ((UNOP*)gvop)->op_first) &&
6156 gvop->op_type == OP_GV)
6157 {
638eceb6 6158 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6159 OP *sibling = o2->op_sibling;
2692f720 6160 SV *n = newSVpvn("",0);
9675f7ac 6161 op_free(o2);
2692f720
GS		 6162 gv_fullname3(n, gv, "");
6163 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6164 sv_chop(n, SvPVX(n)+6);
6165 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6166 prev->op_sibling = o2;
6167 o2->op_sibling = sibling;
6168 }
6169 }
6170 }
6171 }
2ba6ecf4
GS		 6172 scalar(o2);
6173 break;
4633a7c4
LW		 6174 case '\\':
6175 proto++;
6176 arg++;
6177 switch (*proto++) {
6178 case '*':
11343788 6179 if (o2->op_type != OP_RV2GV)
5dc0d613 6180 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6181 goto wrapref;
6182 case '&':
11343788 6183 if (o2->op_type != OP_RV2CV)
5dc0d613 6184 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6185 goto wrapref;
6186 case '$':
386acf99
GS		 6187 if (o2->op_type != OP_RV2SV
6188 && o2->op_type != OP_PADSV
1c01eb51
GS		 6189 && o2->op_type != OP_HELEM
6190 && o2->op_type != OP_AELEM
386acf99
GS		 6191 && o2->op_type != OP_THREADSV)
6192 {
5dc0d613 6193 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6194 }
4633a7c4
LW		 6195 goto wrapref;
6196 case '@':
11343788 6197 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6198 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6199 goto wrapref;
6200 case '%':
11343788 6201 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6202 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6203 wrapref:
6204 {
11343788 6205 OP* kid = o2;
6fa846a0 6206 OP* sib = kid->op_sibling;
4633a7c4 6207 kid->op_sibling = 0;
6fa846a0
GS		 6208 o2 = newUNOP(OP_REFGEN, 0, kid);
6209 o2->op_sibling = sib;
e858de61 6210 prev->op_sibling = o2;
4633a7c4
LW		 6211 }
6212 break;
6213 default: goto oops;
6214 }
6215 break;
b1cb66bf 6216 case ' ':
6217 proto++;
6218 continue;
4633a7c4
LW		 6219 default:
6220 oops:
cea2e8a9 6221 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6222 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6223 }
6224 }
6225 else
11343788
MB		 6226 list(o2);
6227 mod(o2, OP_ENTERSUB);
6228 prev = o2;
6229 o2 = o2->op_sibling;
4633a7c4 6230 }
fb73857a 6231 if (proto && !optional &&
6232 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6233 return too_few_arguments(o, gv_ename(namegv));
11343788 6234 return o;
79072805
LW		 6235}
6236
6237OP *
cea2e8a9 6238Perl_ck_svconst(pTHX_ OP *o)
8990e307 6239{
11343788
MB		 6240 SvREADONLY_on(cSVOPo->op_sv);
6241 return o;
8990e307
LW		 6242}
6243
6244OP *
cea2e8a9 6245Perl_ck_trunc(pTHX_ OP *o)
79072805 6246{
11343788
MB		 6247 if (o->op_flags & OPf_KIDS) {
6248 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6249
a0d0e21e
LW		 6250 if (kid->op_type == OP_NULL)
6251 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6252 if (kid && kid->op_type == OP_CONST &&
6253 (kid->op_private & OPpCONST_BARE))
6254 {
11343788 6255 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6256 kid->op_private &= ~OPpCONST_STRICT;
6257 }
79072805 6258 }
11343788 6259 return ck_fun(o);
79072805
LW		 6260}
6261
463ee0b2
LW		 6262/* A peephole optimizer. We visit the ops in the order they're to execute. */
6263
79072805 6264void
864dbfa3 6265Perl_peep(pTHX_ register OP *o)
79072805 6266{
11343788 6267 dTHR;
79072805 6268 register OP* oldop = 0;
2d8e6c8d 6269 STRLEN n_a;
cd06dffe 6270 OP *last_composite = Nullop;
2d8e6c8d 6271
a0d0e21e 6272 if (!o || o->op_seq)
79072805 6273 return;
a0d0e21e 6274 ENTER;
462e5cf6 6275 SAVEOP();
7766f137 6276 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6277 for (; o; o = o->op_next) {
6278 if (o->op_seq)
6279 break;
3280af22
NIS		 6280 if (!PL_op_seqmax)
6281 PL_op_seqmax++;
533c011a 6282 PL_op = o;
a0d0e21e 6283 switch (o->op_type) {
acb36ea4 6284 case OP_SETSTATE:
a0d0e21e
LW		 6285 case OP_NEXTSTATE:
6286 case OP_DBSTATE:
3280af22
NIS		 6287 PL_curcop = ((COP*)o); /* for warnings */
6288 o->op_seq = PL_op_seqmax++;
cd06dffe 6289 last_composite = Nullop;
a0d0e21e
LW		 6290 break;
6291
a0d0e21e 6292 case OP_CONST:
7a52d87a
GS		 6293 if (cSVOPo->op_private & OPpCONST_STRICT)
6294 no_bareword_allowed(o);
7766f137
GS		 6295#ifdef USE_ITHREADS
6296 /* Relocate sv to the pad for thread safety.
6297 * Despite being a "constant", the SV is written to,
6298 * for reference counts, sv_upgrade() etc. */
6299 if (cSVOP->op_sv) {
6300 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6301 SvREFCNT_dec(PL_curpad[ix]);
6302 SvPADTMP_on(cSVOPo->op_sv);
6303 PL_curpad[ix] = cSVOPo->op_sv;
6304 cSVOPo->op_sv = Nullsv;
6305 o->op_targ = ix;
6306 }
6307#endif
7a52d87a 6308 /* FALL THROUGH */
a0d0e21e
LW		 6309 case OP_UC:
6310 case OP_UCFIRST:
6311 case OP_LC:
6312 case OP_LCFIRST:
ed7ab888
GS		 6313 case OP_CONCAT:
6314 case OP_JOIN:
a0d0e21e 6315 case OP_QUOTEMETA:
b162f9ea
IZ		 6316 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6317 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6318 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6319 goto ignore_optimization;
cd06dffe 6320 else {
b162f9ea 6321 o->op_targ = o->op_next->op_targ;
743e66e6 6322 o->op_next->op_targ = 0;
2c2d71f5 6323 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6324 }
6325 }
a0d0e21e 6326 null(o->op_next);
b162f9ea
IZ		 6327 }
6328 ignore_optimization:
3280af22 6329 o->op_seq = PL_op_seqmax++;
a0d0e21e 6330 break;
8990e307 6331 case OP_STUB:
54310121 6332 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6333 o->op_seq = PL_op_seqmax++;
54310121 6334 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6335 }
748a9306 6336 goto nothin;
79072805 6337 case OP_NULL:
acb36ea4
GS		 6338 if (o->op_targ == OP_NEXTSTATE
6339 || o->op_targ == OP_DBSTATE
6340 || o->op_targ == OP_SETSTATE)
6341 {
3280af22 6342 PL_curcop = ((COP*)o);
acb36ea4 6343 }
748a9306 6344 goto nothin;
79072805 6345 case OP_SCALAR:
93a17b20 6346 case OP_LINESEQ:
463ee0b2 6347 case OP_SCOPE:
748a9306 6348 nothin:
a0d0e21e
LW		 6349 if (oldop && o->op_next) {
6350 oldop->op_next = o->op_next;
79072805
LW		 6351 continue;
6352 }
3280af22 6353 o->op_seq = PL_op_seqmax++;
79072805
LW		 6354 break;
6355
6356 case OP_GV:
a0d0e21e 6357 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6358 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6359 null(o->op_next);
64aac5a9
GS		 6360 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6361 | OPpOUR_INTRO);
a0d0e21e
LW		 6362 o->op_next = o->op_next->op_next;
6363 o->op_type = OP_GVSV;
22c35a8c 6364 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6365 }
6366 }
a0d0e21e
LW		 6367 else if (o->op_next->op_type == OP_RV2AV) {
6368 OP* pop = o->op_next->op_next;
6369 IV i;
8990e307 6370 if (pop->op_type == OP_CONST &&
533c011a 6371 (PL_op = pop->op_next) &&
8990e307 6372 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6373 !(pop->op_next->op_private &
68dc0745 6374 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6375 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6376 <= 255 &&
8990e307
LW		 6377 i >= 0)
6378 {
350de78d 6379 GV *gv;
a0d0e21e 6380 null(o->op_next);
8990e307
LW		 6381 null(pop->op_next);
6382 null(pop);
a0d0e21e
LW		 6383 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6384 o->op_next = pop->op_next->op_next;
6385 o->op_type = OP_AELEMFAST;
22c35a8c 6386 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6387 o->op_private = (U8)i;
638eceb6 6388 gv = cGVOPo_gv;
350de78d 6389 GvAVn(gv);
8990e307 6390 }
79072805 6391 }
76cd736e 6392 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
638eceb6 6393 GV *gv = cGVOPo_gv;
76cd736e
GS		 6394 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6395 /* XXX could check prototype here instead of just carping */
6396 SV *sv = sv_newmortal();
6397 gv_efullname3(sv, gv, Nullch);
6398 Perl_warner(aTHX_ WARN_UNSAFE,
6399 "%s() called too early to check prototype",
6400 SvPV_nolen(sv));
6401 }
6402 }
6403
3280af22 6404 o->op_seq = PL_op_seqmax++;
79072805
LW		 6405 break;
6406
a0d0e21e 6407 case OP_MAPWHILE:
79072805
LW		 6408 case OP_GREPWHILE:
6409 case OP_AND:
6410 case OP_OR:
2c2d71f5
JH		 6411 case OP_ANDASSIGN:
6412 case OP_ORASSIGN:
1a67a97c
SM		 6413 case OP_COND_EXPR:
6414 case OP_RANGE:
3280af22 6415 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6416 while (cLOGOP->op_other->op_type == OP_NULL)
6417 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6418 peep(cLOGOP->op_other);
6419 break;
6420
79072805 6421 case OP_ENTERLOOP:
3280af22 6422 o->op_seq = PL_op_seqmax++;
79072805
LW		 6423 peep(cLOOP->op_redoop);
6424 peep(cLOOP->op_nextop);
6425 peep(cLOOP->op_lastop);
6426 break;
6427
8782bef2 6428 case OP_QR:
79072805
LW		 6429 case OP_MATCH:
6430 case OP_SUBST:
3280af22 6431 o->op_seq = PL_op_seqmax++;
a0d0e21e 6432 peep(cPMOP->op_pmreplstart);
79072805
LW		 6433 break;
6434
a0d0e21e 6435 case OP_EXEC:
3280af22 6436 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6437 if (ckWARN(WARN_SYNTAX) && o->op_next
6438 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6439 if (o->op_next->op_sibling &&
20408e3c
GS		 6440 o->op_next->op_sibling->op_type != OP_EXIT &&
6441 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6442 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6443 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6444
57843af0 6445 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6446 Perl_warner(aTHX_ WARN_EXEC,
6447 "Statement unlikely to be reached");
6448 Perl_warner(aTHX_ WARN_EXEC,
6449 "(Maybe you meant system() when you said exec()?)\n");
57843af0 6450 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6451 }
6452 }
6453 break;
aeea060c 6454
c750a3ec
MB		 6455 case OP_HELEM: {
6456 UNOP *rop;
6457 SV *lexname;
6458 GV **fields;
6459 SV **svp, **indsvp;
6460 I32 ind;
6461 char *key;
6462 STRLEN keylen;
aeea060c 6463
377b21bb 6464 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6465 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6466 break;
6467 rop = (UNOP*)((BINOP*)o)->op_first;
6468 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6469 break;
3280af22 6470 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6471 if (!SvOBJECT(lexname))
6472 break;
5196be3e 6473 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6474 if (!fields || !GvHV(*fields))
6475 break;
638eceb6 6476 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6477 key = SvPV(*svp, keylen);
6478 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6479 if (!indsvp) {
88e9b055 6480 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6481 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6482 }
6483 ind = SvIV(*indsvp);
6484 if (ind < 1)
cea2e8a9 6485 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6486 rop->op_type = OP_RV2AV;
22c35a8c 6487 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6488 o->op_type = OP_AELEM;
22c35a8c 6489 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6490 SvREFCNT_dec(*svp);
6491 *svp = newSViv(ind);
6492 break;
6493 }
6494
cd06dffe
GS		 6495 case OP_RV2AV:
6496 case OP_RV2HV:
6497 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6498 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6499 {
cd06dffe 6500 last_composite = o;
e1f15930 6501 }
cd06dffe
GS		 6502 o->op_seq = PL_op_seqmax++;
6503 break;
6504
6505 case OP_RETURN:
970c4905 6506 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6507 o->op_seq = PL_op_seqmax++;
6508 break;
6509 }
6510 /* FALL THROUGH */
6511
6512 case OP_LEAVESUBLV:
6513 if (last_composite) {
6514 OP *r = last_composite;
6515
6516 while (r->op_sibling)
6517 r = r->op_sibling;
6518 if (r->op_next == o
6519 || (r->op_next->op_type == OP_LIST
6520 && r->op_next->op_next == o))
6521 {
6522 if (last_composite->op_type == OP_RV2AV)
6523 yyerror("Lvalue subs returning arrays not implemented yet");
6524 else
6525 yyerror("Lvalue subs returning hashes not implemented yet");
6526 ;
6527 }
6528 }
6529 /* FALL THROUGH */
6530
79072805 6531 default:
3280af22 6532 o->op_seq = PL_op_seqmax++;
79072805
LW		 6533 break;
6534 }
a0d0e21e 6535 oldop = o;
79072805 6536 }
a0d0e21e 6537 LEAVE;
79072805 6538}
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