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fix line continuations in argument lists (from Helmut Jarausch)
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
4eb8286e 3 * Copyright (c) 1991-1999, 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
NIS		 155 SV **svp = AvARRAY(PL_comppad_name);
156 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 157 if ((sv = svp[off])
3280af22 158 && sv != &PL_sv_undef
c53d7c7d 159 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 160 && strEQ(name, SvPVX(sv)))
161 {
f472eb5c
GS		 162 if (PL_in_my != KEY_our
163 || GvSTASH(sv) == (PL_curstash ? PL_curstash : PL_defstash))
164 {
165 Perl_warner(aTHX_ WARN_UNSAFE,
77ca0c92
LW		 166 "\"%s\" variable %s masks earlier declaration in same %s",
167 (PL_in_my == KEY_our ? "our" : "my"),
168 name,
169 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
f472eb5c 170 }
b1cb66bf 171 break;
172 }
173 }
174 }
a0d0e21e
LW		 175 off = pad_alloc(OP_PADSV, SVs_PADMY);
176 sv = NEWSV(1102,0);
93a17b20
LW		 177 sv_upgrade(sv, SVt_PVNV);
178 sv_setpv(sv, name);
3280af22 179 if (PL_in_my_stash) {
c750a3ec 180 if (*name != '$')
cea2e8a9 181 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 182 name));
c750a3ec
MB		 183 SvOBJECT_on(sv);
184 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 185 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
186 PL_sv_objcount++;
c750a3ec 187 }
f472eb5c
GS		 188 if (PL_in_my == KEY_our) {
189 (void)SvUPGRADE(sv, SVt_PVGV);
190 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? PL_curstash : PL_defstash);
77ca0c92 191 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 192 }
3280af22 193 av_store(PL_comppad_name, off, sv);
65202027 194 SvNVX(sv) = (NV)PAD_MAX;
8990e307 195 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 196 if (!PL_min_intro_pending)
197 PL_min_intro_pending = off;
198 PL_max_intro_pending = off;
93a17b20 199 if (*name == '@')
3280af22 200 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 201 else if (*name == '%')
3280af22
NIS		 202 av_store(PL_comppad, off, (SV*)newHV());
203 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 204 return off;
205}
206
94f23f41
GS		 207STATIC PADOFFSET
208S_pad_addlex(pTHX_ SV *proto_namesv)
209{
210 SV *namesv = NEWSV(1103,0);
211 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
212 sv_upgrade(namesv, SVt_PVNV);
213 sv_setpv(namesv, SvPVX(proto_namesv));
214 av_store(PL_comppad_name, newoff, namesv);
215 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
216 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
217 SvFAKE_on(namesv); /* A ref, not a real var */
218 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
219 SvFLAGS(namesv) |= SVpad_OUR;
220 (void)SvUPGRADE(namesv, SVt_PVGV);
221 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
222 }
223 if (SvOBJECT(proto_namesv)) { /* A typed var */
224 SvOBJECT_on(namesv);
225 (void)SvUPGRADE(namesv, SVt_PVMG);
226 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
227 PL_sv_objcount++;
228 }
229 return newoff;
230}
231
2680586e
GS		 232#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
233
76e3520e 234STATIC PADOFFSET
cea2e8a9 235S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 236 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 237{
11343788 238 dTHR;
748a9306 239 CV *cv;
93a17b20
LW		 240 I32 off;
241 SV *sv;
93a17b20 242 register I32 i;
c09156bb 243 register PERL_CONTEXT *cx;
93a17b20 244
748a9306 245 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 246 AV *curlist = CvPADLIST(cv);
247 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 248 AV *curname;
4fdae800 249
3280af22 250 if (!svp || *svp == &PL_sv_undef)
4633a7c4 251 continue;
748a9306
LW		 252 curname = (AV*)*svp;
253 svp = AvARRAY(curname);
93965878 254 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 255 if ((sv = svp[off]) &&
3280af22 256 sv != &PL_sv_undef &&
748a9306 257 seq <= SvIVX(sv) &&
13826f2c 258 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 259 strEQ(SvPVX(sv), name))
260 {
5f05dabc 261 I32 depth;
262 AV *oldpad;
263 SV *oldsv;
264
265 depth = CvDEPTH(cv);
266 if (!depth) {
9607fc9c 267 if (newoff) {
268 if (SvFAKE(sv))
269 continue;
4fdae800 270 return 0; /* don't clone from inactive stack frame */
9607fc9c 271 }
5f05dabc 272 depth = 1;
273 }
94f23f41 274 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 275 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 276 if (!newoff) { /* Not a mere clone operation. */
94f23f41 277 newoff = pad_addlex(sv);
3280af22 278 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 279 /* "It's closures all the way down." */
3280af22 280 CvCLONE_on(PL_compcv);
54310121 281 if (cv == startcv) {
3280af22 282 if (CvANON(PL_compcv))
54310121 283 oldsv = Nullsv; /* no need to keep ref */
284 }
285 else {
28757baa 286 CV *bcv;
287 for (bcv = startcv;
288 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 289 bcv = CvOUTSIDE(bcv))
290 {
94f23f41
GS		 291 if (CvANON(bcv)) {
292 /* install the missing pad entry in intervening
293 * nested subs and mark them cloneable.
294 * XXX fix pad_foo() to not use globals */
295 AV *ocomppad_name = PL_comppad_name;
296 AV *ocomppad = PL_comppad;
297 SV **ocurpad = PL_curpad;
298 AV *padlist = CvPADLIST(bcv);
299 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
300 PL_comppad = (AV*)AvARRAY(padlist)[1];
301 PL_curpad = AvARRAY(PL_comppad);
302 pad_addlex(sv);
303 PL_comppad_name = ocomppad_name;
304 PL_comppad = ocomppad;
305 PL_curpad = ocurpad;
28757baa 306 CvCLONE_on(bcv);
94f23f41 307 }
28757baa 308 else {
6b35e009
GS		 309 if (ckWARN(WARN_CLOSURE)
310 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
311 {
cea2e8a9 312 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 313 "Variable \"%s\" may be unavailable",
28757baa 314 name);
6b35e009 315 }
28757baa 316 break;
317 }
318 }
319 }
320 }
3280af22 321 else if (!CvUNIQUE(PL_compcv)) {
599cee73 322 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 323 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 324 "Variable \"%s\" will not stay shared", name);
5f05dabc 325 }
748a9306 326 }
3280af22 327 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 328 return newoff;
329 }
93a17b20
LW		 330 }
331 }
332
2680586e
GS		 333 if (flags & FINDLEX_NOSEARCH)
334 return 0;
335
93a17b20
LW		 336 /* Nothing in current lexical context--try eval's context, if any.
337 * This is necessary to let the perldb get at lexically scoped variables.
338 * XXX This will also probably interact badly with eval tree caching.
339 */
340
748a9306 341 for (i = cx_ix; i >= 0; i--) {
93a17b20 342 cx = &cxstack[i];
6b35e009 343 switch (CxTYPE(cx)) {
93a17b20 344 default:
748a9306
LW		 345 if (i == 0 && saweval) {
346 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 347 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 348 }
93a17b20
LW		 349 break;
350 case CXt_EVAL:
44a8e56a 351 switch (cx->blk_eval.old_op_type) {
352 case OP_ENTEREVAL:
6b35e009
GS		 353 if (CxREALEVAL(cx))
354 saweval = i;
44a8e56a 355 break;
356 case OP_REQUIRE:
357 /* require must have its own scope */
358 return 0;
359 }
93a17b20 360 break;
7766f137 361 case CXt_FORMAT:
93a17b20
LW		 362 case CXt_SUB:
363 if (!saweval)
364 return 0;
365 cv = cx->blk_sub.cv;
3280af22 366 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 367 saweval = i; /* so we know where we were called from */
93a17b20 368 continue;
93a17b20 369 }
748a9306 370 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 371 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 372 }
373 }
374
748a9306
LW		 375 return 0;
376}
a0d0e21e 377
748a9306 378PADOFFSET
864dbfa3 379Perl_pad_findmy(pTHX_ char *name)
748a9306 380{
11343788 381 dTHR;
748a9306 382 I32 off;
54310121 383 I32 pendoff = 0;
748a9306 384 SV *sv;
3280af22
NIS		 385 SV **svp = AvARRAY(PL_comppad_name);
386 U32 seq = PL_cop_seqmax;
6b35e009 387 PERL_CONTEXT *cx;
33b8ce05 388 CV *outside;
748a9306 389
11343788
MB		 390#ifdef USE_THREADS
391 /*
392 * Special case to get lexical (and hence per-thread) @_.
393 * XXX I need to find out how to tell at parse-time whether use
394 * of @_ should refer to a lexical (from a sub) or defgv (global
395 * scope and maybe weird sub-ish things like formats). See
396 * startsub in perly.y. It's possible that @_ could be lexical
397 * (at least from subs) even in non-threaded perl.
398 */
399 if (strEQ(name, "@_"))
400 return 0; /* success. (NOT_IN_PAD indicates failure) */
401#endif /* USE_THREADS */
402
748a9306 403 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 404 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 405 if ((sv = svp[off]) &&
3280af22 406 sv != &PL_sv_undef &&
54310121 407 (!SvIVX(sv) ||
408 (seq <= SvIVX(sv) &&
409 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 410 strEQ(SvPVX(sv), name))
411 {
77ca0c92 412 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 413 return (PADOFFSET)off;
414 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 415 }
416 }
748a9306 417
33b8ce05
GS		 418 outside = CvOUTSIDE(PL_compcv);
419
420 /* Check if if we're compiling an eval'', and adjust seq to be the
421 * eval's seq number. This depends on eval'' having a non-null
422 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 423 * identified by CvEVAL being true and CvGV being null. */
424 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 425 cx = &cxstack[cxstack_ix];
426 if (CxREALEVAL(cx))
427 seq = cx->blk_oldcop->cop_seq;
428 }
429
748a9306 430 /* See if it's in a nested scope */
2680586e 431 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 432 if (off) {
433 /* If there is a pending local definition, this new alias must die */
434 if (pendoff)
3280af22 435 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 436 return off; /* pad_findlex returns 0 for failure...*/
54310121 437 }
11343788 438 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 439}
440
441void
864dbfa3 442Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 443{
0453d815 444 dTHR;
93a17b20 445 I32 off;
3280af22 446 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 447 SV *sv;
3280af22
NIS		 448 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
449 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 450 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
451 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 452 }
453 }
454 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 455 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 456 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 457 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 458 }
459}
460
461PADOFFSET
864dbfa3 462Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 463{
11343788 464 dTHR;
79072805
LW		 465 SV *sv;
466 I32 retval;
467
3280af22 468 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 469 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 470 if (PL_pad_reset_pending)
a0d0e21e 471 pad_reset();
ed6116ce 472 if (tmptype & SVs_PADMY) {
79072805 473 do {
3280af22 474 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 475 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 476 retval = AvFILLp(PL_comppad);
79072805
LW		 477 }
478 else {
3280af22
NIS		 479 SV **names = AvARRAY(PL_comppad_name);
480 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 481 for (;;) {
482 /*
483 * "foreach" index vars temporarily become aliases to non-"my"
484 * values. Thus we must skip, not just pad values that are
485 * marked as current pad values, but also those with names.
486 */
3280af22
NIS		 487 if (++PL_padix <= names_fill &&
488 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 489 continue;
3280af22 490 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 491 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 492 break;
493 }
3280af22 494 retval = PL_padix;
79072805 495 }
8990e307 496 SvFLAGS(sv) |= tmptype;
3280af22 497 PL_curpad = AvARRAY(PL_comppad);
11343788 498#ifdef USE_THREADS
b900a521
JH		 499 DEBUG_X(PerlIO_printf(Perl_debug_log,
500 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
501 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 502 (long) retval, PL_op_name[optype]));
11343788 503#else
b900a521
JH		 504 DEBUG_X(PerlIO_printf(Perl_debug_log,
505 "Pad 0x%"UVxf" alloc %ld for %s\n",
506 PTR2UV(PL_curpad),
22c35a8c 507 (long) retval, PL_op_name[optype]));
11343788 508#endif /* USE_THREADS */
79072805
LW		 509 return (PADOFFSET)retval;
510}
511
512SV *
864dbfa3 513Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 514{
11343788
MB		 515 dTHR;
516#ifdef USE_THREADS
b900a521 517 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 518 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
519 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 520#else
79072805 521 if (!po)
cea2e8a9 522 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 523 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
524 PTR2UV(PL_curpad), (IV)po));
11343788 525#endif /* USE_THREADS */
3280af22 526 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 527}
528
529void
864dbfa3 530Perl_pad_free(pTHX_ PADOFFSET po)
79072805 531{
11343788 532 dTHR;
3280af22 533 if (!PL_curpad)
a0d0e21e 534 return;
3280af22 535 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 536 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 537 if (!po)
cea2e8a9 538 Perl_croak(aTHX_ "panic: pad_free po");
11343788 539#ifdef USE_THREADS
b900a521 540 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 541 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 542 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 543#else
97835f67
JH		 544 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
545 PTR2UV(PL_curpad), (IV)po));
11343788 546#endif /* USE_THREADS */
2aa1bedc 547 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 548 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 549#ifdef USE_ITHREADS
550 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
551#endif
552 }
3280af22
NIS		 553 if ((I32)po < PL_padix)
554 PL_padix = po - 1;
79072805
LW		 555}
556
557void
864dbfa3 558Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 559{
11343788 560 dTHR;
3280af22 561 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 562 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 563 if (!po)
cea2e8a9 564 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 565#ifdef USE_THREADS
b900a521 566 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 567 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
568 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 569#else
97835f67
JH		 570 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
571 PTR2UV(PL_curpad), (IV)po));
11343788 572#endif /* USE_THREADS */
3280af22
NIS		 573 SvPADTMP_off(PL_curpad[po]);
574 PL_curpad[po] = NEWSV(1107,0);
575 SvPADTMP_on(PL_curpad[po]);
576 if ((I32)po < PL_padix)
577 PL_padix = po - 1;
79072805
LW		 578}
579
d9bb4600
GS		 580/* XXX pad_reset() is currently disabled because it results in serious bugs.
581 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
582 * on the stack by OPs that use them, there are several ways to get an alias
583 * to a shared TARG. Such an alias will change randomly and unpredictably.
584 * We avoid doing this until we can think of a Better Way.
585 * GSAR 97-10-29 */
79072805 586void
864dbfa3 587Perl_pad_reset(pTHX)
79072805 588{
d9bb4600 589#ifdef USE_BROKEN_PAD_RESET
11343788 590 dTHR;
79072805
LW		 591 register I32 po;
592
6b88bc9c 593 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 594 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 595#ifdef USE_THREADS
b900a521
JH		 596 DEBUG_X(PerlIO_printf(Perl_debug_log,
597 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
598 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 599#else
b900a521
JH		 600 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
601 PTR2UV(PL_curpad)));
11343788 602#endif /* USE_THREADS */
6b88bc9c
GS		 603 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
604 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
605 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
606 SvPADTMP_off(PL_curpad[po]);
748a9306 607 }
6b88bc9c 608 PL_padix = PL_padix_floor;
79072805 609 }
d9bb4600 610#endif
3280af22 611 PL_pad_reset_pending = FALSE;
79072805
LW		 612}
613
a863c7d1 614#ifdef USE_THREADS
54b9620d 615/* find_threadsv is not reentrant */
a863c7d1 616PADOFFSET
864dbfa3 617Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 618{
619 dTHR;
620 char *p;
621 PADOFFSET key;
554b3eca 622 SV **svp;
54b9620d 623 /* We currently only handle names of a single character */
533c011a 624 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 625 if (!p)
626 return NOT_IN_PAD;
533c011a 627 key = p - PL_threadsv_names;
2d8e6c8d 628 MUTEX_LOCK(&thr->mutex);
54b9620d 629 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 630 if (svp)
631 MUTEX_UNLOCK(&thr->mutex);
632 else {
554b3eca 633 SV *sv = NEWSV(0, 0);
54b9620d 634 av_store(thr->threadsv, key, sv);
940cb80d 635 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 636 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 637 /*
638 * Some magic variables used to be automagically initialised
639 * in gv_fetchpv. Those which are now per-thread magicals get
640 * initialised here instead.
641 */
642 switch (*name) {
54b9620d
MB		 643 case '_':
644 break;
554b3eca
MB		 645 case ';':
646 sv_setpv(sv, "\034");
54b9620d 647 sv_magic(sv, 0, 0, name, 1);
554b3eca 648 break;
c277df42
IZ		 649 case '&':
650 case '`':
651 case '\'':
533c011a 652 PL_sawampersand = TRUE;
a3f914c5
GS		 653 /* FALL THROUGH */
654 case '1':
655 case '2':
656 case '3':
657 case '4':
658 case '5':
659 case '6':
660 case '7':
661 case '8':
662 case '9':
c277df42 663 SvREADONLY_on(sv);
d8b5173a 664 /* FALL THROUGH */
067391ea
GS		 665
666 /* XXX %! tied to Errno.pm needs to be added here.
667 * See gv_fetchpv(). */
668 /* case '!': */
669
54b9620d
MB		 670 default:
671 sv_magic(sv, 0, 0, name, 1);
554b3eca 672 }
bf49b057 673 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 674 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 675 sv, (*name < 32) ? "^" : "",
676 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 677 }
678 return key;
679}
680#endif /* USE_THREADS */
681
79072805
LW		 682/* Destructor */
683
684void
864dbfa3 685Perl_op_free(pTHX_ OP *o)
79072805 686{
85e6fe83 687 register OP *kid, *nextkid;
acb36ea4 688 OPCODE type;
79072805 689
5dc0d613 690 if (!o || o->op_seq == (U16)-1)
79072805
LW		 691 return;
692
7934575e
GS		 693 if (o->op_private & OPpREFCOUNTED) {
694 switch (o->op_type) {
695 case OP_LEAVESUB:
696 case OP_LEAVESUBLV:
697 case OP_LEAVEEVAL:
698 case OP_LEAVE:
699 case OP_SCOPE:
700 case OP_LEAVEWRITE:
701 OP_REFCNT_LOCK;
702 if (OpREFCNT_dec(o)) {
703 OP_REFCNT_UNLOCK;
704 return;
705 }
706 OP_REFCNT_UNLOCK;
707 break;
708 default:
709 break;
710 }
711 }
712
11343788
MB		 713 if (o->op_flags & OPf_KIDS) {
714 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 715 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 716 op_free(kid);
85e6fe83 717 }
79072805 718 }
acb36ea4
GS		 719 type = o->op_type;
720 if (type == OP_NULL)
721 type = o->op_targ;
722
723 /* COP* is not cleared by op_clear() so that we may track line
724 * numbers etc even after null() */
725 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
726 cop_free((COP*)o);
727
728 op_clear(o);
729
730#ifdef PL_OP_SLAB_ALLOC
731 if ((char *) o == PL_OpPtr)
732 {
733 }
734#else
735 Safefree(o);
736#endif
737}
79072805 738
acb36ea4
GS		 739STATIC void
740S_op_clear(pTHX_ OP *o)
741{
11343788 742 switch (o->op_type) {
acb36ea4
GS		 743 case OP_NULL: /* Was holding old type, if any. */
744 case OP_ENTEREVAL: /* Was holding hints. */
745#ifdef USE_THREADS
746 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
747#endif
748 o->op_targ = 0;
a0d0e21e 749 break;
554b3eca 750#ifdef USE_THREADS
8dd3ba40
SM		 751 case OP_ENTERITER:
752 if (!(o->op_flags & OPf_SPECIAL))
753 break;
754 /* FALL THROUGH */
554b3eca 755#endif /* USE_THREADS */
a6006777 756 default:
ac4c12e7 757 if (!(o->op_flags & OPf_REF)
0b94c7bb 758 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 759 break;
760 /* FALL THROUGH */
463ee0b2 761 case OP_GVSV:
79072805 762 case OP_GV:
a6006777 763 case OP_AELEMFAST:
350de78d 764#ifdef USE_ITHREADS
971a9dd3
GS		 765 if (cPADOPo->op_padix > 0) {
766 if (PL_curpad) {
638eceb6 767 GV *gv = cGVOPo_gv;
971a9dd3
GS		 768 pad_swipe(cPADOPo->op_padix);
769 /* No GvIN_PAD_off(gv) here, because other references may still
770 * exist on the pad */
771 SvREFCNT_dec(gv);
772 }
773 cPADOPo->op_padix = 0;
774 }
350de78d 775#else
971a9dd3 776 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 777 cSVOPo->op_sv = Nullsv;
350de78d 778#endif
79072805
LW		 779 break;
780 case OP_CONST:
11343788 781 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 782 cSVOPo->op_sv = Nullsv;
79072805 783 break;
748a9306
LW		 784 case OP_GOTO:
785 case OP_NEXT:
786 case OP_LAST:
787 case OP_REDO:
11343788 788 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 789 break;
790 /* FALL THROUGH */
a0d0e21e 791 case OP_TRANS:
acb36ea4 792 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 793 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 794 cSVOPo->op_sv = Nullsv;
795 }
796 else {
a0ed51b3 797 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 798 cPVOPo->op_pv = Nullch;
799 }
a0d0e21e
LW		 800 break;
801 case OP_SUBST:
11343788 802 op_free(cPMOPo->op_pmreplroot);
971a9dd3 803 goto clear_pmop;
748a9306 804 case OP_PUSHRE:
971a9dd3
GS		 805#ifdef USE_ITHREADS
806 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
807 if (PL_curpad) {
808 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
809 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
810 /* No GvIN_PAD_off(gv) here, because other references may still
811 * exist on the pad */
812 SvREFCNT_dec(gv);
813 }
814 }
815#else
816 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
817#endif
818 /* FALL THROUGH */
a0d0e21e 819 case OP_MATCH:
8782bef2 820 case OP_QR:
971a9dd3
GS		 821clear_pmop:
822 cPMOPo->op_pmreplroot = Nullop;
c277df42 823 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 824 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 825 break;
79072805
LW		 826 }
827
743e66e6 828 if (o->op_targ > 0) {
11343788 829 pad_free(o->op_targ);
743e66e6
GS		 830 o->op_targ = 0;
831 }
79072805
LW		 832}
833
76e3520e 834STATIC void
3eb57f73
HS		 835S_cop_free(pTHX_ COP* cop)
836{
837 Safefree(cop->cop_label);
57843af0
GS		 838#ifdef USE_ITHREADS
839 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 840 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 841#else
11faa288 842 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 843 SvREFCNT_dec(CopFILEGV(cop));
57843af0 844#endif
0453d815 845 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 846 SvREFCNT_dec(cop->cop_warnings);
847}
848
849STATIC void
cea2e8a9 850S_null(pTHX_ OP *o)
8990e307 851{
acb36ea4
GS		 852 if (o->op_type == OP_NULL)
853 return;
854 op_clear(o);
11343788
MB		 855 o->op_targ = o->op_type;
856 o->op_type = OP_NULL;
22c35a8c 857 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 858}
859
79072805
LW		 860/* Contextualizers */
861
463ee0b2 862#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 863
864OP *
864dbfa3 865Perl_linklist(pTHX_ OP *o)
79072805
LW		 866{
867 register OP *kid;
868
11343788
MB		 869 if (o->op_next)
870 return o->op_next;
79072805
LW		 871
872 /* establish postfix order */
11343788
MB		 873 if (cUNOPo->op_first) {
874 o->op_next = LINKLIST(cUNOPo->op_first);
875 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 876 if (kid->op_sibling)
877 kid->op_next = LINKLIST(kid->op_sibling);
878 else
11343788 879 kid->op_next = o;
79072805
LW		 880 }
881 }
882 else
11343788 883 o->op_next = o;
79072805 884
11343788 885 return o->op_next;
79072805
LW		 886}
887
888OP *
864dbfa3 889Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 890{
891 OP *kid;
11343788
MB		 892 if (o && o->op_flags & OPf_KIDS) {
893 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 894 scalar(kid);
895 }
11343788 896 return o;
79072805
LW		 897}
898
76e3520e 899STATIC OP *
cea2e8a9 900S_scalarboolean(pTHX_ OP *o)
8990e307 901{
d008e5eb 902 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 903 dTHR;
d008e5eb 904 if (ckWARN(WARN_SYNTAX)) {
57843af0 905 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 906
d008e5eb 907 if (PL_copline != NOLINE)
57843af0 908 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 909 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 910 CopLINE_set(PL_curcop, oldline);
d008e5eb 911 }
a0d0e21e 912 }
11343788 913 return scalar(o);
8990e307
LW		 914}
915
916OP *
864dbfa3 917Perl_scalar(pTHX_ OP *o)
79072805
LW		 918{
919 OP *kid;
920
a0d0e21e 921 /* assumes no premature commitment */
3280af22 922 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 923 || o->op_type == OP_RETURN)
7e363e51 924 {
11343788 925 return o;
7e363e51 926 }
79072805 927
5dc0d613 928 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 929
11343788 930 switch (o->op_type) {
79072805 931 case OP_REPEAT:
11343788
MB		 932 if (o->op_private & OPpREPEAT_DOLIST)
933 null(((LISTOP*)cBINOPo->op_first)->op_first);
934 scalar(cBINOPo->op_first);
8990e307 935 break;
79072805
LW		 936 case OP_OR:
937 case OP_AND:
938 case OP_COND_EXPR:
11343788 939 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 940 scalar(kid);
79072805 941 break;
a0d0e21e 942 case OP_SPLIT:
11343788 943 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 944 if (!kPMOP->op_pmreplroot)
945 deprecate("implicit split to @_");
946 }
947 /* FALL THROUGH */
79072805 948 case OP_MATCH:
8782bef2 949 case OP_QR:
79072805
LW		 950 case OP_SUBST:
951 case OP_NULL:
8990e307 952 default:
11343788
MB		 953 if (o->op_flags & OPf_KIDS) {
954 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 955 scalar(kid);
956 }
79072805
LW		 957 break;
958 case OP_LEAVE:
959 case OP_LEAVETRY:
5dc0d613 960 kid = cLISTOPo->op_first;
54310121 961 scalar(kid);
962 while (kid = kid->op_sibling) {
963 if (kid->op_sibling)
964 scalarvoid(kid);
965 else
966 scalar(kid);
967 }
3280af22 968 WITH_THR(PL_curcop = &PL_compiling);
54310121 969 break;
748a9306 970 case OP_SCOPE:
79072805 971 case OP_LINESEQ:
8990e307 972 case OP_LIST:
11343788 973 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 974 if (kid->op_sibling)
975 scalarvoid(kid);
976 else
977 scalar(kid);
978 }
3280af22 979 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 980 break;
981 }
11343788 982 return o;
79072805
LW		 983}
984
985OP *
864dbfa3 986Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 987{
988 OP *kid;
8990e307
LW		 989 char* useless = 0;
990 SV* sv;
2ebea0a1
GS		 991 U8 want;
992
acb36ea4
GS		 993 if (o->op_type == OP_NEXTSTATE
994 || o->op_type == OP_SETSTATE
995 || o->op_type == OP_DBSTATE
996 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
997 || o->op_targ == OP_SETSTATE
998 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 999 {
1000 dTHR;
1001 PL_curcop = (COP*)o; /* for warning below */
1002 }
79072805 1003
54310121 1004 /* assumes no premature commitment */
2ebea0a1
GS		 1005 want = o->op_flags & OPf_WANT;
1006 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1007 || o->op_type == OP_RETURN)
7e363e51 1008 {
11343788 1009 return o;
7e363e51 1010 }
79072805 1011
b162f9ea 1012 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1013 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1014 {
b162f9ea 1015 return scalar(o); /* As if inside SASSIGN */
7e363e51 1016 }
b162f9ea 1017
5dc0d613 1018 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1019
11343788 1020 switch (o->op_type) {
79072805 1021 default:
22c35a8c 1022 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1023 break;
36477c24 1024 /* FALL THROUGH */
1025 case OP_REPEAT:
11343788 1026 if (o->op_flags & OPf_STACKED)
8990e307 1027 break;
5d82c453
GA		 1028 goto func_ops;
1029 case OP_SUBSTR:
1030 if (o->op_private == 4)
1031 break;
8990e307
LW		 1032 /* FALL THROUGH */
1033 case OP_GVSV:
1034 case OP_WANTARRAY:
1035 case OP_GV:
1036 case OP_PADSV:
1037 case OP_PADAV:
1038 case OP_PADHV:
1039 case OP_PADANY:
1040 case OP_AV2ARYLEN:
8990e307 1041 case OP_REF:
a0d0e21e
LW		 1042 case OP_REFGEN:
1043 case OP_SREFGEN:
8990e307
LW		 1044 case OP_DEFINED:
1045 case OP_HEX:
1046 case OP_OCT:
1047 case OP_LENGTH:
8990e307
LW		 1048 case OP_VEC:
1049 case OP_INDEX:
1050 case OP_RINDEX:
1051 case OP_SPRINTF:
1052 case OP_AELEM:
1053 case OP_AELEMFAST:
1054 case OP_ASLICE:
8990e307
LW		 1055 case OP_HELEM:
1056 case OP_HSLICE:
1057 case OP_UNPACK:
1058 case OP_PACK:
8990e307
LW		 1059 case OP_JOIN:
1060 case OP_LSLICE:
1061 case OP_ANONLIST:
1062 case OP_ANONHASH:
1063 case OP_SORT:
1064 case OP_REVERSE:
1065 case OP_RANGE:
1066 case OP_FLIP:
1067 case OP_FLOP:
1068 case OP_CALLER:
1069 case OP_FILENO:
1070 case OP_EOF:
1071 case OP_TELL:
1072 case OP_GETSOCKNAME:
1073 case OP_GETPEERNAME:
1074 case OP_READLINK:
1075 case OP_TELLDIR:
1076 case OP_GETPPID:
1077 case OP_GETPGRP:
1078 case OP_GETPRIORITY:
1079 case OP_TIME:
1080 case OP_TMS:
1081 case OP_LOCALTIME:
1082 case OP_GMTIME:
1083 case OP_GHBYNAME:
1084 case OP_GHBYADDR:
1085 case OP_GHOSTENT:
1086 case OP_GNBYNAME:
1087 case OP_GNBYADDR:
1088 case OP_GNETENT:
1089 case OP_GPBYNAME:
1090 case OP_GPBYNUMBER:
1091 case OP_GPROTOENT:
1092 case OP_GSBYNAME:
1093 case OP_GSBYPORT:
1094 case OP_GSERVENT:
1095 case OP_GPWNAM:
1096 case OP_GPWUID:
1097 case OP_GGRNAM:
1098 case OP_GGRGID:
1099 case OP_GETLOGIN:
5d82c453 1100 func_ops:
11343788 1101 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 1102 useless = PL_op_desc[o->op_type];
8990e307
LW		 1103 break;
1104
1105 case OP_RV2GV:
1106 case OP_RV2SV:
1107 case OP_RV2AV:
1108 case OP_RV2HV:
192587c2 1109 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1110 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1111 useless = "a variable";
1112 break;
79072805
LW		 1113
1114 case OP_CONST:
7766f137 1115 sv = cSVOPo_sv;
7a52d87a
GS		 1116 if (cSVOPo->op_private & OPpCONST_STRICT)
1117 no_bareword_allowed(o);
1118 else {
d008e5eb
GS		 1119 dTHR;
1120 if (ckWARN(WARN_VOID)) {
1121 useless = "a constant";
1122 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1123 useless = 0;
1124 else if (SvPOK(sv)) {
1125 if (strnEQ(SvPVX(sv), "di", 2) ||
1126 strnEQ(SvPVX(sv), "ds", 2) ||
1127 strnEQ(SvPVX(sv), "ig", 2))
1128 useless = 0;
1129 }
8990e307
LW		 1130 }
1131 }
acb36ea4 1132 null(o); /* don't execute or even remember it */
79072805
LW		 1133 break;
1134
1135 case OP_POSTINC:
11343788 1136 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1137 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1138 break;
1139
1140 case OP_POSTDEC:
11343788 1141 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1142 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1143 break;
1144
79072805
LW		 1145 case OP_OR:
1146 case OP_AND:
1147 case OP_COND_EXPR:
11343788 1148 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1149 scalarvoid(kid);
1150 break;
5aabfad6 1151
a0d0e21e 1152 case OP_NULL:
11343788 1153 if (o->op_flags & OPf_STACKED)
a0d0e21e 1154 break;
5aabfad6 1155 /* FALL THROUGH */
2ebea0a1
GS		 1156 case OP_NEXTSTATE:
1157 case OP_DBSTATE:
79072805
LW		 1158 case OP_ENTERTRY:
1159 case OP_ENTER:
1160 case OP_SCALAR:
11343788 1161 if (!(o->op_flags & OPf_KIDS))
79072805 1162 break;
54310121 1163 /* FALL THROUGH */
463ee0b2 1164 case OP_SCOPE:
79072805
LW		 1165 case OP_LEAVE:
1166 case OP_LEAVETRY:
a0d0e21e 1167 case OP_LEAVELOOP:
79072805 1168 case OP_LINESEQ:
79072805 1169 case OP_LIST:
11343788 1170 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1171 scalarvoid(kid);
1172 break;
c90c0ff4 1173 case OP_ENTEREVAL:
5196be3e 1174 scalarkids(o);
c90c0ff4 1175 break;
5aabfad6 1176 case OP_REQUIRE:
c90c0ff4 1177 /* all requires must return a boolean value */
5196be3e
MB		 1178 o->op_flags &= ~OPf_WANT;
1179 return scalar(o);
a0d0e21e 1180 case OP_SPLIT:
11343788 1181 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1182 if (!kPMOP->op_pmreplroot)
1183 deprecate("implicit split to @_");
1184 }
1185 break;
79072805 1186 }
d008e5eb
GS		 1187 if (useless) {
1188 dTHR;
1189 if (ckWARN(WARN_VOID))
cea2e8a9 1190 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1191 }
11343788 1192 return o;
79072805
LW		 1193}
1194
1195OP *
864dbfa3 1196Perl_listkids(pTHX_ OP *o)
79072805
LW		 1197{
1198 OP *kid;
11343788
MB		 1199 if (o && o->op_flags & OPf_KIDS) {
1200 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1201 list(kid);
1202 }
11343788 1203 return o;
79072805
LW		 1204}
1205
1206OP *
864dbfa3 1207Perl_list(pTHX_ OP *o)
79072805
LW		 1208{
1209 OP *kid;
1210
a0d0e21e 1211 /* assumes no premature commitment */
3280af22 1212 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1213 || o->op_type == OP_RETURN)
7e363e51 1214 {
11343788 1215 return o;
7e363e51 1216 }
79072805 1217
b162f9ea 1218 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1219 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1220 {
b162f9ea 1221 return o; /* As if inside SASSIGN */
7e363e51 1222 }
b162f9ea 1223
5dc0d613 1224 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1225
11343788 1226 switch (o->op_type) {
79072805
LW		 1227 case OP_FLOP:
1228 case OP_REPEAT:
11343788 1229 list(cBINOPo->op_first);
79072805
LW		 1230 break;
1231 case OP_OR:
1232 case OP_AND:
1233 case OP_COND_EXPR:
11343788 1234 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1235 list(kid);
1236 break;
1237 default:
1238 case OP_MATCH:
8782bef2 1239 case OP_QR:
79072805
LW		 1240 case OP_SUBST:
1241 case OP_NULL:
11343788 1242 if (!(o->op_flags & OPf_KIDS))
79072805 1243 break;
11343788
MB		 1244 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1245 list(cBINOPo->op_first);
1246 return gen_constant_list(o);
79072805
LW		 1247 }
1248 case OP_LIST:
11343788 1249 listkids(o);
79072805
LW		 1250 break;
1251 case OP_LEAVE:
1252 case OP_LEAVETRY:
5dc0d613 1253 kid = cLISTOPo->op_first;
54310121 1254 list(kid);
1255 while (kid = kid->op_sibling) {
1256 if (kid->op_sibling)
1257 scalarvoid(kid);
1258 else
1259 list(kid);
1260 }
3280af22 1261 WITH_THR(PL_curcop = &PL_compiling);
54310121 1262 break;
748a9306 1263 case OP_SCOPE:
79072805 1264 case OP_LINESEQ:
11343788 1265 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1266 if (kid->op_sibling)
1267 scalarvoid(kid);
1268 else
1269 list(kid);
1270 }
3280af22 1271 WITH_THR(PL_curcop = &PL_compiling);
79072805 1272 break;
c90c0ff4 1273 case OP_REQUIRE:
1274 /* all requires must return a boolean value */
5196be3e
MB		 1275 o->op_flags &= ~OPf_WANT;
1276 return scalar(o);
79072805 1277 }
11343788 1278 return o;
79072805
LW		 1279}
1280
1281OP *
864dbfa3 1282Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1283{
1284 OP *kid;
1285
11343788
MB		 1286 if (o) {
1287 if (o->op_type == OP_LINESEQ ||
1288 o->op_type == OP_SCOPE ||
1289 o->op_type == OP_LEAVE ||
1290 o->op_type == OP_LEAVETRY)
463ee0b2 1291 {
0f15f207 1292 dTHR;
11343788 1293 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1294 if (kid->op_sibling) {
463ee0b2 1295 scalarvoid(kid);
ed6116ce 1296 }
463ee0b2 1297 }
3280af22 1298 PL_curcop = &PL_compiling;
79072805 1299 }
11343788 1300 o->op_flags &= ~OPf_PARENS;
3280af22 1301 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1302 o->op_flags |= OPf_PARENS;
79072805 1303 }
8990e307 1304 else
11343788
MB		 1305 o = newOP(OP_STUB, 0);
1306 return o;
79072805
LW		 1307}
1308
76e3520e 1309STATIC OP *
cea2e8a9 1310S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1311{
1312 OP *kid;
11343788
MB		 1313 if (o && o->op_flags & OPf_KIDS) {
1314 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1315 mod(kid, type);
79072805 1316 }
11343788 1317 return o;
79072805
LW		 1318}
1319
79072805 1320OP *
864dbfa3 1321Perl_mod(pTHX_ OP *o, I32 type)
79072805 1322{
11343788 1323 dTHR;
79072805
LW		 1324 OP *kid;
1325 SV *sv;
2d8e6c8d 1326 STRLEN n_a;
79072805 1327
3280af22 1328 if (!o || PL_error_count)
11343788 1329 return o;
79072805 1330
b162f9ea 1331 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1332 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1333 {
b162f9ea 1334 return o;
7e363e51 1335 }
b162f9ea 1336
11343788 1337 switch (o->op_type) {
68dc0745 1338 case OP_UNDEF:
3280af22 1339 PL_modcount++;
5dc0d613 1340 return o;
a0d0e21e 1341 case OP_CONST:
11343788 1342 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1343 goto nomod;
3280af22 1344 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1345 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1346 PL_eval_start = 0;
a0d0e21e
LW		 1347 }
1348 else if (!type) {
3280af22
NIS		 1349 SAVEI32(PL_compiling.cop_arybase);
1350 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1351 }
1352 else if (type == OP_REFGEN)
1353 goto nomod;
1354 else
cea2e8a9 1355 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1356 break;
5f05dabc 1357 case OP_STUB:
5196be3e 1358 if (o->op_flags & OPf_PARENS)
5f05dabc 1359 break;
1360 goto nomod;
a0d0e21e
LW		 1361 case OP_ENTERSUB:
1362 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1363 !(o->op_flags & OPf_STACKED)) {
1364 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1365 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1366 assert(cUNOPo->op_first->op_type == OP_NULL);
1367 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1368 break;
1369 }
cd06dffe
GS		 1370 else { /* lvalue subroutine call */
1371 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1372 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1373 /* Backward compatibility mode: */
1374 o->op_private |= OPpENTERSUB_INARGS;
1375 break;
1376 }
1377 else { /* Compile-time error message: */
1378 OP *kid = cUNOPo->op_first;
1379 CV *cv;
1380 OP *okid;
1381
1382 if (kid->op_type == OP_PUSHMARK)
1383 goto skip_kids;
1384 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1385 Perl_croak(aTHX_
1386 "panic: unexpected lvalue entersub "
1387 "args: type/targ %ld:%ld",
1388 (long)kid->op_type,kid->op_targ);
1389 kid = kLISTOP->op_first;
1390 skip_kids:
1391 while (kid->op_sibling)
1392 kid = kid->op_sibling;
1393 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1394 /* Indirect call */
1395 if (kid->op_type == OP_METHOD_NAMED
1396 || kid->op_type == OP_METHOD)
1397 {
349fd7b7 1398 OP *newop;
cd06dffe
GS		 1399
1400 if (kid->op_sibling || kid->op_next != kid) {
1401 yyerror("panic: unexpected optree near method call");
1402 break;
1403 }
1404
349fd7b7
GS		 1405 NewOp(1101, newop, 1, OP);
1406 newop->op_type = OP_RV2CV;
1407 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
1408 newop->op_next = newop;
1409 kid->op_sibling = newop;
1410 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1411 break;
1412 }
1413
1414 if (kid->op_type != OP_RV2CV)
1415 Perl_croak(aTHX_
1416 "panic: unexpected lvalue entersub "
1417 "entry via type/targ %ld:%ld",
1418 (long)kid->op_type,kid->op_targ);
1419 kid->op_private |= OPpLVAL_INTRO;
1420 break; /* Postpone until runtime */
1421 }
1422
1423 okid = kid;
1424 kid = kUNOP->op_first;
1425 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1426 kid = kUNOP->op_first;
1427 if (kid->op_type == OP_NULL)
1428 Perl_croak(aTHX_
1429 "Unexpected constant lvalue entersub "
1430 "entry via type/targ %ld:%ld",
1431 (long)kid->op_type,kid->op_targ);
1432 if (kid->op_type != OP_GV) {
1433 /* Restore RV2CV to check lvalueness */
1434 restore_2cv:
1435 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1436 okid->op_next = kid->op_next;
1437 kid->op_next = okid;
1438 }
1439 else
1440 okid->op_next = Nullop;
1441 okid->op_type = OP_RV2CV;
1442 okid->op_targ = 0;
1443 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1444 okid->op_private |= OPpLVAL_INTRO;
1445 break;
1446 }
1447
638eceb6 1448 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1449 if (!cv)
1450 goto restore_2cv;
1451 if (CvLVALUE(cv))
1452 break;
1453 }
1454 }
79072805
LW		 1455 /* FALL THROUGH */
1456 default:
a0d0e21e
LW		 1457 nomod:
1458 /* grep, foreach, subcalls, refgen */
1459 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1460 break;
cea2e8a9 1461 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1462 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1463 ? "do block"
1464 : (o->op_type == OP_ENTERSUB
1465 ? "non-lvalue subroutine call"
1466 : PL_op_desc[o->op_type])),
22c35a8c 1467 type ? PL_op_desc[type] : "local"));
11343788 1468 return o;
79072805 1469
a0d0e21e
LW		 1470 case OP_PREINC:
1471 case OP_PREDEC:
1472 case OP_POW:
1473 case OP_MULTIPLY:
1474 case OP_DIVIDE:
1475 case OP_MODULO:
1476 case OP_REPEAT:
1477 case OP_ADD:
1478 case OP_SUBTRACT:
1479 case OP_CONCAT:
1480 case OP_LEFT_SHIFT:
1481 case OP_RIGHT_SHIFT:
1482 case OP_BIT_AND:
1483 case OP_BIT_XOR:
1484 case OP_BIT_OR:
1485 case OP_I_MULTIPLY:
1486 case OP_I_DIVIDE:
1487 case OP_I_MODULO:
1488 case OP_I_ADD:
1489 case OP_I_SUBTRACT:
11343788 1490 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1491 goto nomod;
3280af22 1492 PL_modcount++;
a0d0e21e
LW		 1493 break;
1494
79072805 1495 case OP_COND_EXPR:
11343788 1496 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1497 mod(kid, type);
79072805
LW		 1498 break;
1499
1500 case OP_RV2AV:
1501 case OP_RV2HV:
93af7a87 1502 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1503 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1504 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1505 PL_modcount = 10000;
11343788 1506 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1507 }
1508 /* FALL THROUGH */
79072805 1509 case OP_RV2GV:
5dc0d613 1510 if (scalar_mod_type(o, type))
3fe9a6f1 1511 goto nomod;
11343788 1512 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1513 /* FALL THROUGH */
1514 case OP_AASSIGN:
1515 case OP_ASLICE:
1516 case OP_HSLICE:
93a17b20
LW		 1517 case OP_NEXTSTATE:
1518 case OP_DBSTATE:
a0d0e21e
LW		 1519 case OP_REFGEN:
1520 case OP_CHOMP:
3280af22 1521 PL_modcount = 10000;
79072805 1522 break;
463ee0b2 1523 case OP_RV2SV:
11343788 1524 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1525 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1526 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1527 /* FALL THROUGH */
79072805 1528 case OP_GV:
463ee0b2 1529 case OP_AV2ARYLEN:
3280af22 1530 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1531 case OP_SASSIGN:
bf4b1e52
GS		 1532 case OP_ANDASSIGN:
1533 case OP_ORASSIGN:
8990e307 1534 case OP_AELEMFAST:
3280af22 1535 PL_modcount++;
8990e307
LW		 1536 break;
1537
748a9306
LW		 1538 case OP_PADAV:
1539 case OP_PADHV:
3280af22 1540 PL_modcount = 10000;
5196be3e
MB		 1541 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1542 return o; /* Treat \(@foo) like ordinary list. */
1543 if (scalar_mod_type(o, type))
3fe9a6f1 1544 goto nomod;
748a9306
LW		 1545 /* FALL THROUGH */
1546 case OP_PADSV:
3280af22 1547 PL_modcount++;
748a9306 1548 if (!type)
cea2e8a9 1549 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1550 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1551 break;
1552
554b3eca 1553#ifdef USE_THREADS
2faa37cc 1554 case OP_THREADSV:
533c011a 1555 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1556 break;
1557#endif /* USE_THREADS */
1558
748a9306
LW		 1559 case OP_PUSHMARK:
1560 break;
a0d0e21e 1561
69969c6f
SB		 1562 case OP_KEYS:
1563 if (type != OP_SASSIGN)
1564 goto nomod;
5d82c453
GA		 1565 goto lvalue_func;
1566 case OP_SUBSTR:
1567 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1568 goto nomod;
5f05dabc 1569 /* FALL THROUGH */
a0d0e21e 1570 case OP_POS:
463ee0b2 1571 case OP_VEC:
5d82c453 1572 lvalue_func:
11343788
MB		 1573 pad_free(o->op_targ);
1574 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1575 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1576 if (o->op_flags & OPf_KIDS)
1577 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1578 break;
a0d0e21e 1579
463ee0b2
LW		 1580 case OP_AELEM:
1581 case OP_HELEM:
11343788 1582 ref(cBINOPo->op_first, o->op_type);
68dc0745 1583 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1584 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1585 o->op_private |= OPpLVAL_DEFER;
3280af22 1586 PL_modcount++;
463ee0b2
LW		 1587 break;
1588
1589 case OP_SCOPE:
1590 case OP_LEAVE:
1591 case OP_ENTER:
11343788
MB		 1592 if (o->op_flags & OPf_KIDS)
1593 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1594 break;
1595
1596 case OP_NULL:
638bc118
GS		 1597 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1598 goto nomod;
1599 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1600 break;
11343788
MB		 1601 if (o->op_targ != OP_LIST) {
1602 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1603 break;
1604 }
1605 /* FALL THROUGH */
463ee0b2 1606 case OP_LIST:
11343788 1607 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1608 mod(kid, type);
1609 break;
1610 }
11343788 1611 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1612
1613 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1614 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1615 else if (!type) {
11343788
MB		 1616 o->op_private |= OPpLVAL_INTRO;
1617 o->op_flags &= ~OPf_SPECIAL;
3280af22 1618 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1619 }
a0d0e21e 1620 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1621 o->op_flags |= OPf_REF;
1622 return o;
463ee0b2
LW		 1623}
1624
864dbfa3 1625STATIC bool
cea2e8a9 1626S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1627{
1628 switch (type) {
1629 case OP_SASSIGN:
5196be3e 1630 if (o->op_type == OP_RV2GV)
3fe9a6f1 1631 return FALSE;
1632 /* FALL THROUGH */
1633 case OP_PREINC:
1634 case OP_PREDEC:
1635 case OP_POSTINC:
1636 case OP_POSTDEC:
1637 case OP_I_PREINC:
1638 case OP_I_PREDEC:
1639 case OP_I_POSTINC:
1640 case OP_I_POSTDEC:
1641 case OP_POW:
1642 case OP_MULTIPLY:
1643 case OP_DIVIDE:
1644 case OP_MODULO:
1645 case OP_REPEAT:
1646 case OP_ADD:
1647 case OP_SUBTRACT:
1648 case OP_I_MULTIPLY:
1649 case OP_I_DIVIDE:
1650 case OP_I_MODULO:
1651 case OP_I_ADD:
1652 case OP_I_SUBTRACT:
1653 case OP_LEFT_SHIFT:
1654 case OP_RIGHT_SHIFT:
1655 case OP_BIT_AND:
1656 case OP_BIT_XOR:
1657 case OP_BIT_OR:
1658 case OP_CONCAT:
1659 case OP_SUBST:
1660 case OP_TRANS:
49e9fbe6
GS		 1661 case OP_READ:
1662 case OP_SYSREAD:
1663 case OP_RECV:
bf4b1e52
GS		 1664 case OP_ANDASSIGN:
1665 case OP_ORASSIGN:
3fe9a6f1 1666 return TRUE;
1667 default:
1668 return FALSE;
1669 }
1670}
1671
35cd451c 1672STATIC bool
cea2e8a9 1673S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1674{
1675 switch (o->op_type) {
1676 case OP_PIPE_OP:
1677 case OP_SOCKPAIR:
1678 if (argnum == 2)
1679 return TRUE;
1680 /* FALL THROUGH */
1681 case OP_SYSOPEN:
1682 case OP_OPEN:
ded8aa31 1683 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1684 case OP_SOCKET:
1685 case OP_OPEN_DIR:
1686 case OP_ACCEPT:
1687 if (argnum == 1)
1688 return TRUE;
1689 /* FALL THROUGH */
1690 default:
1691 return FALSE;
1692 }
1693}
1694
463ee0b2 1695OP *
864dbfa3 1696Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1697{
1698 OP *kid;
11343788
MB		 1699 if (o && o->op_flags & OPf_KIDS) {
1700 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1701 ref(kid, type);
1702 }
11343788 1703 return o;
463ee0b2
LW		 1704}
1705
1706OP *
864dbfa3 1707Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1708{
1709 OP *kid;
463ee0b2 1710
3280af22 1711 if (!o || PL_error_count)
11343788 1712 return o;
463ee0b2 1713
11343788 1714 switch (o->op_type) {
a0d0e21e 1715 case OP_ENTERSUB:
afebc493 1716 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1717 !(o->op_flags & OPf_STACKED)) {
1718 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1719 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1720 assert(cUNOPo->op_first->op_type == OP_NULL);
1721 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1722 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1723 }
1724 break;
aeea060c 1725
463ee0b2 1726 case OP_COND_EXPR:
11343788 1727 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1728 ref(kid, type);
1729 break;
8990e307 1730 case OP_RV2SV:
35cd451c
GS		 1731 if (type == OP_DEFINED)
1732 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1733 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1734 /* FALL THROUGH */
1735 case OP_PADSV:
5f05dabc 1736 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1737 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1738 : type == OP_RV2HV ? OPpDEREF_HV
1739 : OPpDEREF_SV);
11343788 1740 o->op_flags |= OPf_MOD;
a0d0e21e 1741 }
8990e307
LW		 1742 break;
1743
2faa37cc 1744 case OP_THREADSV:
a863c7d1
MB		 1745 o->op_flags |= OPf_MOD; /* XXX ??? */
1746 break;
1747
463ee0b2
LW		 1748 case OP_RV2AV:
1749 case OP_RV2HV:
aeea060c 1750 o->op_flags |= OPf_REF;
8990e307 1751 /* FALL THROUGH */
463ee0b2 1752 case OP_RV2GV:
35cd451c
GS		 1753 if (type == OP_DEFINED)
1754 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1755 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1756 break;
8990e307 1757
463ee0b2
LW		 1758 case OP_PADAV:
1759 case OP_PADHV:
aeea060c 1760 o->op_flags |= OPf_REF;
79072805 1761 break;
aeea060c 1762
8990e307 1763 case OP_SCALAR:
79072805 1764 case OP_NULL:
11343788 1765 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1766 break;
11343788 1767 ref(cBINOPo->op_first, type);
79072805
LW		 1768 break;
1769 case OP_AELEM:
1770 case OP_HELEM:
11343788 1771 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1772 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1773 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1774 : type == OP_RV2HV ? OPpDEREF_HV
1775 : OPpDEREF_SV);
11343788 1776 o->op_flags |= OPf_MOD;
8990e307 1777 }
79072805
LW		 1778 break;
1779
463ee0b2 1780 case OP_SCOPE:
79072805
LW		 1781 case OP_LEAVE:
1782 case OP_ENTER:
8990e307 1783 case OP_LIST:
11343788 1784 if (!(o->op_flags & OPf_KIDS))
79072805 1785 break;
11343788 1786 ref(cLISTOPo->op_last, type);
79072805 1787 break;
a0d0e21e
LW		 1788 default:
1789 break;
79072805 1790 }
11343788 1791 return scalar(o);
8990e307 1792
79072805
LW		 1793}
1794
09bef843
SB		 1795STATIC OP *
1796S_dup_attrlist(pTHX_ OP *o)
1797{
1798 OP *rop = Nullop;
1799
1800 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1801 * where the first kid is OP_PUSHMARK and the remaining ones
1802 * are OP_CONST. We need to push the OP_CONST values.
1803 */
1804 if (o->op_type == OP_CONST)
1805 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1806 else {
1807 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1808 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1809 if (o->op_type == OP_CONST)
1810 rop = append_elem(OP_LIST, rop,
1811 newSVOP(OP_CONST, o->op_flags,
1812 SvREFCNT_inc(cSVOPo->op_sv)));
1813 }
1814 }
1815 return rop;
1816}
1817
1818STATIC void
1819S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1820{
1821 OP *modname; /* for 'use' */
1822 SV *stashsv;
1823
1824 /* fake up C<use attributes $pkg,$rv,@attrs> */
1825 ENTER; /* need to protect against side-effects of 'use' */
1826 SAVEINT(PL_expect);
1827 if (stash && HvNAME(stash))
1828 stashsv = newSVpv(HvNAME(stash), 0);
1829 else
1830 stashsv = &PL_sv_no;
1831#define ATTRSMODULE "attributes"
1832 modname = newSVOP(OP_CONST, 0,
1833 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1834 modname->op_private |= OPpCONST_BARE;
1835 /* that flag is required to make 'use' work right */
1836 utilize(1, start_subparse(FALSE, 0),
1837 Nullop, /* version */
1838 modname,
1839 prepend_elem(OP_LIST,
1840 newSVOP(OP_CONST, 0, stashsv),
1841 prepend_elem(OP_LIST,
1842 newSVOP(OP_CONST, 0, newRV(target)),
1843 dup_attrlist(attrs))));
1844 LEAVE;
1845}
1846
1847STATIC OP *
1848S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1849{
1850 OP *kid;
93a17b20
LW		 1851 I32 type;
1852
3280af22 1853 if (!o || PL_error_count)
11343788 1854 return o;
93a17b20 1855
11343788 1856 type = o->op_type;
93a17b20 1857 if (type == OP_LIST) {
11343788 1858 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1859 my_kid(kid, attrs);
dab48698 1860 } else if (type == OP_UNDEF) {
7766148a 1861 return o;
77ca0c92
LW		 1862 } else if (type == OP_RV2SV || /* "our" declaration */
1863 type == OP_RV2AV ||
1864 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1865 o->op_private |= OPpOUR_INTRO;
77ca0c92 1866 return o;
dab48698 1867 } else if (type != OP_PADSV &&
93a17b20
LW		 1868 type != OP_PADAV &&
1869 type != OP_PADHV &&
1870 type != OP_PUSHMARK)
1871 {
cea2e8a9 1872 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1873 return o;
93a17b20 1874 }
09bef843
SB		 1875 else if (attrs && type != OP_PUSHMARK) {
1876 HV *stash;
1877 SV *padsv;
1878 SV **namesvp;
1879
1880 /* check for C<my Dog $spot> when deciding package */
1881 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1882 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1883 stash = SvSTASH(*namesvp);
1884 else
1885 stash = PL_curstash;
1886 padsv = PAD_SV(o->op_targ);
1887 apply_attrs(stash, padsv, attrs);
1888 }
11343788
MB		 1889 o->op_flags |= OPf_MOD;
1890 o->op_private |= OPpLVAL_INTRO;
1891 return o;
93a17b20
LW		 1892}
1893
1894OP *
09bef843
SB		 1895Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1896{
1897 if (o->op_flags & OPf_PARENS)
1898 list(o);
1899 PL_in_my = FALSE;
1900 PL_in_my_stash = Nullhv;
1901 if (attrs)
1902 SAVEFREEOP(attrs);
1903 return my_kid(o, attrs);
1904}
1905
1906OP *
1907Perl_my(pTHX_ OP *o)
1908{
1909 return my_kid(o, Nullop);
1910}
1911
1912OP *
864dbfa3 1913Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1914{
1915 if (o)
1916 o->op_flags |= OPf_PARENS;
1917 return o;
1918}
1919
1920OP *
864dbfa3 1921Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1922{
d008e5eb 1923 dTHR;
11343788 1924 OP *o;
79072805 1925
599cee73
PM		 1926 if (ckWARN(WARN_UNSAFE) &&
1927 (left->op_type == OP_RV2AV ||
1928 left->op_type == OP_RV2HV ||
1929 left->op_type == OP_PADAV ||
1930 left->op_type == OP_PADHV)) {
22c35a8c 1931 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1932 right->op_type == OP_TRANS)
1933 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1934 const char *sample = ((left->op_type == OP_RV2AV ||
1935 left->op_type == OP_PADAV)
1936 ? "@array" : "%hash");
cea2e8a9 1937 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1938 "Applying %s to %s will act on scalar(%s)",
1939 desc, sample, sample);
2ae324a7 1940 }
1941
79072805
LW		 1942 if (right->op_type == OP_MATCH ||
1943 right->op_type == OP_SUBST ||
1944 right->op_type == OP_TRANS) {
1945 right->op_flags |= OPf_STACKED;
1946 if (right->op_type != OP_MATCH)
463ee0b2 1947 left = mod(left, right->op_type);
79072805 1948 if (right->op_type == OP_TRANS)
11343788 1949 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1950 else
11343788 1951 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1952 if (type == OP_NOT)
11343788
MB		 1953 return newUNOP(OP_NOT, 0, scalar(o));
1954 return o;
79072805
LW		 1955 }
1956 else
1957 return bind_match(type, left,
1958 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1959}
1960
1961OP *
864dbfa3 1962Perl_invert(pTHX_ OP *o)
79072805 1963{
11343788
MB		 1964 if (!o)
1965 return o;
79072805 1966 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1967 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1968}
1969
1970OP *
864dbfa3 1971Perl_scope(pTHX_ OP *o)
79072805
LW		 1972{
1973 if (o) {
3280af22 1974 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1975 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1976 o->op_type = OP_LEAVE;
22c35a8c 1977 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1978 }
1979 else {
1980 if (o->op_type == OP_LINESEQ) {
1981 OP *kid;
1982 o->op_type = OP_SCOPE;
22c35a8c 1983 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1984 kid = ((LISTOP*)o)->op_first;
1985 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1986 null(kid);
463ee0b2
LW		 1987 }
1988 else
748a9306 1989 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1990 }
79072805
LW		 1991 }
1992 return o;
1993}
1994
b3ac6de7 1995void
864dbfa3 1996Perl_save_hints(pTHX)
b3ac6de7 1997{
3280af22
NIS		 1998 SAVEI32(PL_hints);
1999 SAVESPTR(GvHV(PL_hintgv));
2000 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2001 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2002}
2003
a0d0e21e 2004int
864dbfa3 2005Perl_block_start(pTHX_ int full)
79072805 2006{
11343788 2007 dTHR;
3280af22 2008 int retval = PL_savestack_ix;
b3ac6de7 2009
3280af22 2010 SAVEI32(PL_comppad_name_floor);
55497cff 2011 if (full) {
3280af22
NIS		 2012 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
2013 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 2014 else
3280af22
NIS		 2015 PL_comppad_name_floor = 0;
2016 }
2017 SAVEI32(PL_min_intro_pending);
2018 SAVEI32(PL_max_intro_pending);
2019 PL_min_intro_pending = 0;
2020 SAVEI32(PL_comppad_name_fill);
2021 SAVEI32(PL_padix_floor);
2022 PL_padix_floor = PL_padix;
2023 PL_pad_reset_pending = FALSE;
b3ac6de7 2024 SAVEHINTS();
3280af22 2025 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2026 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2027 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2028 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2029 SAVEFREESV(PL_compiling.cop_warnings) ;
2030 }
2031
2032
a0d0e21e
LW		 2033 return retval;
2034}
2035
2036OP*
864dbfa3 2037Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2038{
11343788 2039 dTHR;
3280af22 2040 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2041 OP* retval = scalarseq(seq);
a0d0e21e 2042 LEAVE_SCOPE(floor);
3280af22 2043 PL_pad_reset_pending = FALSE;
e24b16f9 2044 PL_compiling.op_private = PL_hints;
a0d0e21e 2045 if (needblockscope)
3280af22
NIS		 2046 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2047 pad_leavemy(PL_comppad_name_fill);
2048 PL_cop_seqmax++;
a0d0e21e
LW		 2049 return retval;
2050}
2051
76e3520e 2052STATIC OP *
cea2e8a9 2053S_newDEFSVOP(pTHX)
54b9620d
MB		 2054{
2055#ifdef USE_THREADS
2056 OP *o = newOP(OP_THREADSV, 0);
2057 o->op_targ = find_threadsv("_");
2058 return o;
2059#else
3280af22 2060 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2061#endif /* USE_THREADS */
2062}
2063
a0d0e21e 2064void
864dbfa3 2065Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2066{
11343788 2067 dTHR;
3280af22 2068 if (PL_in_eval) {
b295d113
TH		 2069 if (PL_eval_root)
2070 return;
faef0170
HS		 2071 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2072 ((PL_in_eval & EVAL_KEEPERR)
2073 ? OPf_SPECIAL : 0), o);
3280af22 2074 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2075 PL_eval_root->op_private |= OPpREFCOUNTED;
2076 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2077 PL_eval_root->op_next = 0;
2078 peep(PL_eval_start);
a0d0e21e
LW		 2079 }
2080 else {
5dc0d613 2081 if (!o)
a0d0e21e 2082 return;
3280af22
NIS		 2083 PL_main_root = scope(sawparens(scalarvoid(o)));
2084 PL_curcop = &PL_compiling;
2085 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2086 PL_main_root->op_private |= OPpREFCOUNTED;
2087 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2088 PL_main_root->op_next = 0;
2089 peep(PL_main_start);
2090 PL_compcv = 0;
3841441e 2091
4fdae800 2092 /* Register with debugger */
84902520 2093 if (PERLDB_INTER) {
864dbfa3 2094 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2095 if (cv) {
2096 dSP;
924508f0 2097 PUSHMARK(SP);
cc49e20b 2098 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2099 PUTBACK;
864dbfa3 2100 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2101 }
2102 }
79072805 2103 }
79072805
LW		 2104}
2105
2106OP *
864dbfa3 2107Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2108{
2109 if (o->op_flags & OPf_PARENS)
2110 list(o);
8990e307 2111 else {
d008e5eb 2112 dTHR;
599cee73 2113 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2114 char *s;
834a4ddd 2115 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2116 if (*s == ';' || *s == '=')
cea2e8a9 2117 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 2118 lex ? "my" : "local");
8990e307
LW		 2119 }
2120 }
3280af22
NIS		 2121 PL_in_my = FALSE;
2122 PL_in_my_stash = Nullhv;
93a17b20
LW		 2123 if (lex)
2124 return my(o);
2125 else
463ee0b2 2126 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 2127}
2128
2129OP *
864dbfa3 2130Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2131{
2132 if (o->op_type == OP_LIST) {
554b3eca
MB		 2133 OP *o2;
2134#ifdef USE_THREADS
2faa37cc 2135 o2 = newOP(OP_THREADSV, 0);
54b9620d 2136 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2137#else
2138 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2139#endif /* USE_THREADS */
2140 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2141 }
2142 return o;
2143}
2144
2145OP *
864dbfa3 2146Perl_fold_constants(pTHX_ register OP *o)
79072805 2147{
11343788 2148 dTHR;
79072805
LW		 2149 register OP *curop;
2150 I32 type = o->op_type;
748a9306 2151 SV *sv;
79072805 2152
22c35a8c 2153 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2154 scalar(o);
b162f9ea 2155 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2156 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2157
eac055e9
GS		 2158 /* integerize op, unless it happens to be C<-foo>.
2159 * XXX should pp_i_negate() do magic string negation instead? */
2160 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2161 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2162 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2163 {
22c35a8c 2164 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2165 }
85e6fe83 2166
22c35a8c 2167 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2168 goto nope;
2169
de939608 2170 switch (type) {
7a52d87a
GS		 2171 case OP_NEGATE:
2172 /* XXX might want a ck_negate() for this */
2173 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2174 break;
de939608
CS		 2175 case OP_SPRINTF:
2176 case OP_UCFIRST:
2177 case OP_LCFIRST:
2178 case OP_UC:
2179 case OP_LC:
69dcf70c
MB		 2180 case OP_SLT:
2181 case OP_SGT:
2182 case OP_SLE:
2183 case OP_SGE:
2184 case OP_SCMP:
2185
de939608
CS		 2186 if (o->op_private & OPpLOCALE)
2187 goto nope;
2188 }
2189
3280af22 2190 if (PL_error_count)
a0d0e21e
LW		 2191 goto nope; /* Don't try to run w/ errors */
2192
79072805 2193 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2194 if ((curop->op_type != OP_CONST ||
2195 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2196 curop->op_type != OP_LIST &&
2197 curop->op_type != OP_SCALAR &&
2198 curop->op_type != OP_NULL &&
2199 curop->op_type != OP_PUSHMARK)
2200 {
79072805
LW		 2201 goto nope;
2202 }
2203 }
2204
2205 curop = LINKLIST(o);
2206 o->op_next = 0;
533c011a 2207 PL_op = curop;
cea2e8a9 2208 CALLRUNOPS(aTHX);
3280af22 2209 sv = *(PL_stack_sp--);
748a9306 2210 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2211 pad_swipe(o->op_targ);
748a9306
LW		 2212 else if (SvTEMP(sv)) { /* grab mortal temp? */
2213 (void)SvREFCNT_inc(sv);
2214 SvTEMP_off(sv);
85e6fe83 2215 }
79072805
LW		 2216 op_free(o);
2217 if (type == OP_RV2GV)
b1cb66bf 2218 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2219 else {
ee580363
GS		 2220 /* try to smush double to int, but don't smush -2.0 to -2 */
2221 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2222 type != OP_NEGATE)
2223 {
748a9306 2224 IV iv = SvIV(sv);
65202027 2225 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2226 SvREFCNT_dec(sv);
2227 sv = newSViv(iv);
2228 }
b1cb66bf 2229 else
2230 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2231 }
2232 return newSVOP(OP_CONST, 0, sv);
2233 }
aeea060c 2234
79072805 2235 nope:
22c35a8c 2236 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2237 return o;
79072805 2238
3280af22 2239 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2240 if (type == OP_MODULO
2241 || type == OP_DIVIDE
2242 || !(o->op_flags & OPf_KIDS))
2243 {
85e6fe83 2244 return o;
4bb9f687 2245 }
85e6fe83
LW		 2246
2247 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2248 if (curop->op_type == OP_CONST) {
b1cb66bf 2249 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2250 continue;
2251 return o;
2252 }
22c35a8c 2253 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2254 continue;
2255 return o;
2256 }
22c35a8c 2257 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2258 }
2259
79072805
LW		 2260 return o;
2261}
2262
2263OP *
864dbfa3 2264Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2265{
11343788 2266 dTHR;
79072805 2267 register OP *curop;
3280af22 2268 I32 oldtmps_floor = PL_tmps_floor;
79072805 2269
a0d0e21e 2270 list(o);
3280af22 2271 if (PL_error_count)
a0d0e21e
LW		 2272 return o; /* Don't attempt to run with errors */
2273
533c011a 2274 PL_op = curop = LINKLIST(o);
a0d0e21e 2275 o->op_next = 0;
7d4045d4 2276 peep(curop);
cea2e8a9
GS		 2277 pp_pushmark();
2278 CALLRUNOPS(aTHX);
533c011a 2279 PL_op = curop;
cea2e8a9 2280 pp_anonlist();
3280af22 2281 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2282
2283 o->op_type = OP_RV2AV;
22c35a8c 2284 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2285 curop = ((UNOP*)o)->op_first;
3280af22 2286 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2287 op_free(curop);
79072805
LW		 2288 linklist(o);
2289 return list(o);
2290}
2291
2292OP *
864dbfa3 2293Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2294{
2295 OP *kid;
a0d0e21e 2296 OP *last = 0;
79072805 2297
11343788
MB		 2298 if (!o || o->op_type != OP_LIST)
2299 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2300 else
5dc0d613 2301 o->op_flags &= ~OPf_WANT;
79072805 2302
22c35a8c 2303 if (!(PL_opargs[type] & OA_MARK))
11343788 2304 null(cLISTOPo->op_first);
8990e307 2305
11343788 2306 o->op_type = type;
22c35a8c 2307 o->op_ppaddr = PL_ppaddr[type];
11343788 2308 o->op_flags |= flags;
79072805 2309
11343788
MB		 2310 o = CHECKOP(type, o);
2311 if (o->op_type != type)
2312 return o;
79072805 2313
11343788 2314 if (cLISTOPo->op_children < 7) {
79072805 2315 /* XXX do we really need to do this if we're done appending?? */
11343788 2316 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2317 last = kid;
11343788 2318 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2319 }
2320
11343788 2321 return fold_constants(o);
79072805
LW		 2322}
2323
2324/* List constructors */
2325
2326OP *
864dbfa3 2327Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2328{
2329 if (!first)
2330 return last;
8990e307
LW		 2331
2332 if (!last)
79072805 2333 return first;
8990e307 2334
a0d0e21e
LW		 2335 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2336 return newLISTOP(type, 0, first, last);
79072805 2337
a0d0e21e
LW		 2338 if (first->op_flags & OPf_KIDS)
2339 ((LISTOP*)first)->op_last->op_sibling = last;
2340 else {
2341 first->op_flags |= OPf_KIDS;
2342 ((LISTOP*)first)->op_first = last;
2343 }
2344 ((LISTOP*)first)->op_last = last;
2345 ((LISTOP*)first)->op_children++;
2346 return first;
79072805
LW		 2347}
2348
2349OP *
864dbfa3 2350Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2351{
2352 if (!first)
2353 return (OP*)last;
8990e307
LW		 2354
2355 if (!last)
79072805 2356 return (OP*)first;
8990e307
LW		 2357
2358 if (first->op_type != type)
79072805 2359 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2360
2361 if (last->op_type != type)
79072805
LW		 2362 return append_elem(type, (OP*)first, (OP*)last);
2363
2364 first->op_last->op_sibling = last->op_first;
2365 first->op_last = last->op_last;
2366 first->op_children += last->op_children;
2367 if (first->op_children)
acb74605 2368 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2369
2370#ifdef PL_OP_SLAB_ALLOC
2371#else
2372 Safefree(last);
2373#endif
79072805
LW		 2374 return (OP*)first;
2375}
2376
2377OP *
864dbfa3 2378Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2379{
2380 if (!first)
2381 return last;
8990e307
LW		 2382
2383 if (!last)
79072805 2384 return first;
8990e307
LW		 2385
2386 if (last->op_type == type) {
2387 if (type == OP_LIST) { /* already a PUSHMARK there */
2388 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2389 ((LISTOP*)last)->op_first->op_sibling = first;
2390 }
2391 else {
2392 if (!(last->op_flags & OPf_KIDS)) {
2393 ((LISTOP*)last)->op_last = first;
2394 last->op_flags |= OPf_KIDS;
2395 }
2396 first->op_sibling = ((LISTOP*)last)->op_first;
2397 ((LISTOP*)last)->op_first = first;
79072805 2398 }
79072805
LW		 2399 ((LISTOP*)last)->op_children++;
2400 return last;
2401 }
2402
2403 return newLISTOP(type, 0, first, last);
2404}
2405
2406/* Constructors */
2407
2408OP *
864dbfa3 2409Perl_newNULLLIST(pTHX)
79072805 2410{
8990e307
LW		 2411 return newOP(OP_STUB, 0);
2412}
2413
2414OP *
864dbfa3 2415Perl_force_list(pTHX_ OP *o)
8990e307 2416{
11343788
MB		 2417 if (!o || o->op_type != OP_LIST)
2418 o = newLISTOP(OP_LIST, 0, o, Nullop);
2419 null(o);
2420 return o;
79072805
LW		 2421}
2422
2423OP *
864dbfa3 2424Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2425{
2426 LISTOP *listop;
2427
b7dc083c 2428 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2429
2430 listop->op_type = type;
22c35a8c 2431 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2432 listop->op_children = (first != 0) + (last != 0);
2433 listop->op_flags = flags;
79072805
LW		 2434
2435 if (!last && first)
2436 last = first;
2437 else if (!first && last)
2438 first = last;
8990e307
LW		 2439 else if (first)
2440 first->op_sibling = last;
79072805
LW		 2441 listop->op_first = first;
2442 listop->op_last = last;
8990e307
LW		 2443 if (type == OP_LIST) {
2444 OP* pushop;
2445 pushop = newOP(OP_PUSHMARK, 0);
2446 pushop->op_sibling = first;
2447 listop->op_first = pushop;
2448 listop->op_flags |= OPf_KIDS;
2449 if (!last)
2450 listop->op_last = pushop;
2451 }
2452 else if (listop->op_children)
2453 listop->op_flags |= OPf_KIDS;
79072805
LW		 2454
2455 return (OP*)listop;
2456}
2457
2458OP *
864dbfa3 2459Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2460{
11343788 2461 OP *o;
b7dc083c 2462 NewOp(1101, o, 1, OP);
11343788 2463 o->op_type = type;
22c35a8c 2464 o->op_ppaddr = PL_ppaddr[type];
11343788 2465 o->op_flags = flags;
79072805 2466
11343788
MB		 2467 o->op_next = o;
2468 o->op_private = 0 + (flags >> 8);
22c35a8c 2469 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2470 scalar(o);
22c35a8c 2471 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2472 o->op_targ = pad_alloc(type, SVs_PADTMP);
2473 return CHECKOP(type, o);
79072805
LW		 2474}
2475
2476OP *
864dbfa3 2477Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2478{
2479 UNOP *unop;
2480
93a17b20 2481 if (!first)
aeea060c 2482 first = newOP(OP_STUB, 0);
22c35a8c 2483 if (PL_opargs[type] & OA_MARK)
8990e307 2484 first = force_list(first);
93a17b20 2485
b7dc083c 2486 NewOp(1101, unop, 1, UNOP);
79072805 2487 unop->op_type = type;
22c35a8c 2488 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2489 unop->op_first = first;
2490 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2491 unop->op_private = 1 | (flags >> 8);
e50aee73 2492 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2493 if (unop->op_next)
2494 return (OP*)unop;
2495
a0d0e21e 2496 return fold_constants((OP *) unop);
79072805
LW		 2497}
2498
2499OP *
864dbfa3 2500Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2501{
2502 BINOP *binop;
b7dc083c 2503 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2504
2505 if (!first)
2506 first = newOP(OP_NULL, 0);
2507
2508 binop->op_type = type;
22c35a8c 2509 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2510 binop->op_first = first;
2511 binop->op_flags = flags | OPf_KIDS;
2512 if (!last) {
2513 last = first;
c07a80fd 2514 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2515 }
2516 else {
c07a80fd 2517 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2518 first->op_sibling = last;
2519 }
2520
e50aee73 2521 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2522 if (binop->op_next || binop->op_type != type)
79072805
LW		 2523 return (OP*)binop;
2524
7284ab6f 2525 binop->op_last = binop->op_first->op_sibling;
79072805 2526
a0d0e21e 2527 return fold_constants((OP *)binop);
79072805
LW		 2528}
2529
a0ed51b3
LW		 2530static int
2531utf8compare(const void *a, const void *b)
2532{
2533 int i;
2534 for (i = 0; i < 10; i++) {
2535 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2536 return -1;
2537 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2538 return 1;
2539 }
2540 return 0;
2541}
2542
79072805 2543OP *
864dbfa3 2544Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2545{
79072805
LW		 2546 SV *tstr = ((SVOP*)expr)->op_sv;
2547 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2548 STRLEN tlen;
2549 STRLEN rlen;
ec49126f 2550 register U8 *t = (U8*)SvPV(tstr, tlen);
2551 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2552 register I32 i;
2553 register I32 j;
a0ed51b3 2554 I32 del;
79072805 2555 I32 complement;
5d06d08e 2556 I32 squash;
79072805
LW		 2557 register short *tbl;
2558
11343788 2559 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2560 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2561 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2562
a0ed51b3 2563 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2564 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2565 SV* transv = 0;
2566 U8* tend = t + tlen;
2567 U8* rend = r + rlen;
2568 I32 ulen;
2569 U32 tfirst = 1;
2570 U32 tlast = 0;
2571 I32 tdiff;
2572 U32 rfirst = 1;
2573 U32 rlast = 0;
2574 I32 rdiff;
2575 I32 diff;
2576 I32 none = 0;
2577 U32 max = 0;
2578 I32 bits;
2579 I32 grows = 0;
2580 I32 havefinal = 0;
2581 U32 final;
2582 HV *hv;
2583 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2584 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2585
2586 if (complement) {
2587 U8 tmpbuf[10];
2588 U8** cp;
2589 UV nextmin = 0;
2590 New(1109, cp, tlen, U8*);
2591 i = 0;
79cb57f6 2592 transv = newSVpvn("",0);
a0ed51b3
LW		 2593 while (t < tend) {
2594 cp[i++] = t;
2595 t += UTF8SKIP(t);
2596 if (*t == 0xff) {
2597 t++;
2598 t += UTF8SKIP(t);
2599 }
2600 }
2601 qsort(cp, i, sizeof(U8*), utf8compare);
2602 for (j = 0; j < i; j++) {
2603 U8 *s = cp[j];
2604 UV val = utf8_to_uv(s, &ulen);
2605 s += ulen;
2606 diff = val - nextmin;
2607 if (diff > 0) {
2608 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2609 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2610 if (diff > 1) {
2611 t = uv_to_utf8(tmpbuf, val - 1);
2612 sv_catpvn(transv, "\377", 1);
dfe13c55 2613 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2614 }
2615 }
2616 if (*s == 0xff)
2617 val = utf8_to_uv(s+1, &ulen);
2618 if (val >= nextmin)
2619 nextmin = val + 1;
2620 }
2621 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2622 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2623 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2624 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2625 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2626 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2627 tlen = SvCUR(transv);
2628 tend = t + tlen;
2629 }
2630 else if (!rlen && !del) {
2631 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2632 }
2633 if (!squash) {
2634 if (to_utf && from_utf) { /* only counting characters */
2635 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2636 o->op_private |= OPpTRANS_IDENTICAL;
2637 }
2638 else { /* straight latin-1 translation */
2639 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2640 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2641 o->op_private |= OPpTRANS_IDENTICAL;
2642 }
a0ed51b3
LW		 2643 }
2644
2645 while (t < tend || tfirst <= tlast) {
2646 /* see if we need more "t" chars */
2647 if (tfirst > tlast) {
2648 tfirst = (I32)utf8_to_uv(t, &ulen);
2649 t += ulen;
2650 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2651 tlast = (I32)utf8_to_uv(++t, &ulen);
2652 t += ulen;
2653 }
2654 else
2655 tlast = tfirst;
2656 }
2657
2658 /* now see if we need more "r" chars */
2659 if (rfirst > rlast) {
2660 if (r < rend) {
2661 rfirst = (I32)utf8_to_uv(r, &ulen);
2662 r += ulen;
2663 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2664 rlast = (I32)utf8_to_uv(++r, &ulen);
2665 r += ulen;
2666 }
2667 else
2668 rlast = rfirst;
2669 }
2670 else {
2671 if (!havefinal++)
2672 final = rlast;
2673 rfirst = rlast = 0xffffffff;
2674 }
2675 }
2676
2677 /* now see which range will peter our first, if either. */
2678 tdiff = tlast - tfirst;
2679 rdiff = rlast - rfirst;
2680
2681 if (tdiff <= rdiff)
2682 diff = tdiff;
2683 else
2684 diff = rdiff;
2685
2686 if (rfirst == 0xffffffff) {
2687 diff = tdiff; /* oops, pretend rdiff is infinite */
2688 if (diff > 0)
894356b3
GS		 2689 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2690 (long)tfirst, (long)tlast);
a0ed51b3 2691 else
894356b3 2692 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2693 }
2694 else {
2695 if (diff > 0)
894356b3
GS		 2696 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2697 (long)tfirst, (long)(tfirst + diff),
2698 (long)rfirst);
a0ed51b3 2699 else
894356b3
GS		 2700 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2701 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2702
2703 if (rfirst + diff > max)
2704 max = rfirst + diff;
2705 rfirst += diff + 1;
2706 if (!grows) {
2707 if (rfirst <= 0x80)
2708 ;
2709 else if (rfirst <= 0x800)
2710 grows |= (tfirst < 0x80);
2711 else if (rfirst <= 0x10000)
2712 grows |= (tfirst < 0x800);
2713 else if (rfirst <= 0x200000)
2714 grows |= (tfirst < 0x10000);
2715 else if (rfirst <= 0x4000000)
2716 grows |= (tfirst < 0x200000);
2717 else if (rfirst <= 0x80000000)
2718 grows |= (tfirst < 0x4000000);
2719 }
2720 }
2721 tfirst += diff + 1;
2722 }
2723
2724 none = ++max;
2725 if (del)
2726 del = ++max;
2727
2728 if (max > 0xffff)
2729 bits = 32;
2730 else if (max > 0xff)
2731 bits = 16;
2732 else
2733 bits = 8;
2734
2735 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2736 SvREFCNT_dec(listsv);
2737 if (transv)
2738 SvREFCNT_dec(transv);
2739
2740 if (!del && havefinal)
2741 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2742
2743 if (grows && to_utf)
2744 o->op_private |= OPpTRANS_GROWS;
2745
2746 op_free(expr);
2747 op_free(repl);
2748 return o;
2749 }
2750
2751 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2752 if (complement) {
2753 Zero(tbl, 256, short);
2754 for (i = 0; i < tlen; i++)
ec49126f 2755 tbl[t[i]] = -1;
79072805
LW		 2756 for (i = 0, j = 0; i < 256; i++) {
2757 if (!tbl[i]) {
2758 if (j >= rlen) {
a0ed51b3 2759 if (del)
79072805
LW		 2760 tbl[i] = -2;
2761 else if (rlen)
ec49126f 2762 tbl[i] = r[j-1];
79072805
LW		 2763 else
2764 tbl[i] = i;
2765 }
2766 else
ec49126f 2767 tbl[i] = r[j++];
79072805
LW		 2768 }
2769 }
2770 }
2771 else {
a0ed51b3 2772 if (!rlen && !del) {
79072805 2773 r = t; rlen = tlen;
5d06d08e 2774 if (!squash)
4757a243 2775 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2776 }
2777 for (i = 0; i < 256; i++)
2778 tbl[i] = -1;
2779 for (i = 0, j = 0; i < tlen; i++,j++) {
2780 if (j >= rlen) {
a0ed51b3 2781 if (del) {
ec49126f 2782 if (tbl[t[i]] == -1)
2783 tbl[t[i]] = -2;
79072805
LW		 2784 continue;
2785 }
2786 --j;
2787 }
ec49126f 2788 if (tbl[t[i]] == -1)
2789 tbl[t[i]] = r[j];
79072805
LW		 2790 }
2791 }
2792 op_free(expr);
2793 op_free(repl);
2794
11343788 2795 return o;
79072805
LW		 2796}
2797
2798OP *
864dbfa3 2799Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2800{
11343788 2801 dTHR;
79072805
LW		 2802 PMOP *pmop;
2803
b7dc083c 2804 NewOp(1101, pmop, 1, PMOP);
79072805 2805 pmop->op_type = type;
22c35a8c 2806 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2807 pmop->op_flags = flags;
c07a80fd 2808 pmop->op_private = 0 | (flags >> 8);
79072805 2809
3280af22 2810 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2811 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2812 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2813 pmop->op_pmpermflags |= PMf_LOCALE;
2814 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2815
79072805 2816 /* link into pm list */
3280af22
NIS		 2817 if (type != OP_TRANS && PL_curstash) {
2818 pmop->op_pmnext = HvPMROOT(PL_curstash);
2819 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2820 }
2821
2822 return (OP*)pmop;
2823}
2824
2825OP *
864dbfa3 2826Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2827{
5c0ca799 2828 dTHR;
79072805
LW		 2829 PMOP *pm;
2830 LOGOP *rcop;
ce862d02 2831 I32 repl_has_vars = 0;
79072805 2832
11343788
MB		 2833 if (o->op_type == OP_TRANS)
2834 return pmtrans(o, expr, repl);
79072805 2835
3280af22 2836 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2837 pm = (PMOP*)o;
79072805
LW		 2838
2839 if (expr->op_type == OP_CONST) {
463ee0b2 2840 STRLEN plen;
79072805 2841 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2842 char *p = SvPV(pat, plen);
11343788 2843 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2844 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2845 p = SvPV(pat, plen);
79072805
LW		 2846 pm->op_pmflags |= PMf_SKIPWHITE;
2847 }
cea2e8a9 2848 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2849 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2850 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2851 op_free(expr);
2852 }
2853 else {
3280af22
NIS		 2854 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2855 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2856 ? OP_REGCRESET
2857 : OP_REGCMAYBE),0,expr);
463ee0b2 2858
b7dc083c 2859 NewOp(1101, rcop, 1, LOGOP);
79072805 2860 rcop->op_type = OP_REGCOMP;
22c35a8c 2861 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2862 rcop->op_first = scalar(expr);
3280af22 2863 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2864 ? (OPf_SPECIAL | OPf_KIDS)
2865 : OPf_KIDS);
79072805 2866 rcop->op_private = 1;
11343788 2867 rcop->op_other = o;
79072805
LW		 2868
2869 /* establish postfix order */
3280af22 2870 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2871 LINKLIST(expr);
2872 rcop->op_next = expr;
2873 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2874 }
2875 else {
2876 rcop->op_next = LINKLIST(expr);
2877 expr->op_next = (OP*)rcop;
2878 }
79072805 2879
11343788 2880 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2881 }
2882
2883 if (repl) {
748a9306 2884 OP *curop;
0244c3a4 2885 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2886 curop = 0;
57843af0
GS		 2887 if (CopLINE(PL_curcop) < PL_multi_end)
2888 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2889 }
554b3eca 2890#ifdef USE_THREADS
2faa37cc 2891 else if (repl->op_type == OP_THREADSV
554b3eca 2892 && strchr("&`'123456789+",
533c011a 2893 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2894 {
2895 curop = 0;
2896 }
2897#endif /* USE_THREADS */
748a9306
LW		 2898 else if (repl->op_type == OP_CONST)
2899 curop = repl;
79072805 2900 else {
79072805
LW		 2901 OP *lastop = 0;
2902 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2903 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2904#ifdef USE_THREADS
ce862d02
IZ		 2905 if (curop->op_type == OP_THREADSV) {
2906 repl_has_vars = 1;
be949f6f 2907 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2908 break;
554b3eca
MB		 2909 }
2910#else
79072805 2911 if (curop->op_type == OP_GV) {
638eceb6 2912 GV *gv = cGVOPx_gv(curop);
ce862d02 2913 repl_has_vars = 1;
93a17b20 2914 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2915 break;
2916 }
554b3eca 2917#endif /* USE_THREADS */
79072805
LW		 2918 else if (curop->op_type == OP_RV2CV)
2919 break;
2920 else if (curop->op_type == OP_RV2SV ||
2921 curop->op_type == OP_RV2AV ||
2922 curop->op_type == OP_RV2HV ||
2923 curop->op_type == OP_RV2GV) {
2924 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2925 break;
2926 }
748a9306
LW		 2927 else if (curop->op_type == OP_PADSV ||
2928 curop->op_type == OP_PADAV ||
2929 curop->op_type == OP_PADHV ||
554b3eca 2930 curop->op_type == OP_PADANY) {
ce862d02 2931 repl_has_vars = 1;
748a9306 2932 }
1167e5da
SM		 2933 else if (curop->op_type == OP_PUSHRE)
2934 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2935 else
2936 break;
2937 }
2938 lastop = curop;
2939 }
748a9306 2940 }
ce862d02
IZ		 2941 if (curop == repl
2942 && !(repl_has_vars
2943 && (!pm->op_pmregexp
2944 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2945 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2946 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2947 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2948 }
2949 else {
ce862d02
IZ		 2950 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2951 pm->op_pmflags |= PMf_MAYBE_CONST;
2952 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2953 }
b7dc083c 2954 NewOp(1101, rcop, 1, LOGOP);
748a9306 2955 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2956 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2957 rcop->op_first = scalar(repl);
2958 rcop->op_flags |= OPf_KIDS;
2959 rcop->op_private = 1;
11343788 2960 rcop->op_other = o;
748a9306
LW		 2961
2962 /* establish postfix order */
2963 rcop->op_next = LINKLIST(repl);
2964 repl->op_next = (OP*)rcop;
2965
2966 pm->op_pmreplroot = scalar((OP*)rcop);
2967 pm->op_pmreplstart = LINKLIST(rcop);
2968 rcop->op_next = 0;
79072805
LW		 2969 }
2970 }
2971
2972 return (OP*)pm;
2973}
2974
2975OP *
864dbfa3 2976Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2977{
2978 SVOP *svop;
b7dc083c 2979 NewOp(1101, svop, 1, SVOP);
79072805 2980 svop->op_type = type;
22c35a8c 2981 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2982 svop->op_sv = sv;
2983 svop->op_next = (OP*)svop;
2984 svop->op_flags = flags;
22c35a8c 2985 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2986 scalar((OP*)svop);
22c35a8c 2987 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2988 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2989 return CHECKOP(type, svop);
79072805
LW		 2990}
2991
2992OP *
350de78d
GS		 2993Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
2994{
2995 PADOP *padop;
2996 NewOp(1101, padop, 1, PADOP);
2997 padop->op_type = type;
2998 padop->op_ppaddr = PL_ppaddr[type];
2999 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3000 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3001 PL_curpad[padop->op_padix] = sv;
7766f137 3002 SvPADTMP_on(sv);
350de78d
GS		 3003 padop->op_next = (OP*)padop;
3004 padop->op_flags = flags;
3005 if (PL_opargs[type] & OA_RETSCALAR)
3006 scalar((OP*)padop);
3007 if (PL_opargs[type] & OA_TARGET)
3008 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3009 return CHECKOP(type, padop);
3010}
3011
3012OP *
864dbfa3 3013Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3014{
11343788 3015 dTHR;
350de78d 3016#ifdef USE_ITHREADS
743e66e6 3017 GvIN_PAD_on(gv);
350de78d
GS		 3018 return newPADOP(type, flags, SvREFCNT_inc(gv));
3019#else
7934575e 3020 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3021#endif
79072805
LW		 3022}
3023
3024OP *
864dbfa3 3025Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3026{
3027 PVOP *pvop;
b7dc083c 3028 NewOp(1101, pvop, 1, PVOP);
79072805 3029 pvop->op_type = type;
22c35a8c 3030 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3031 pvop->op_pv = pv;
3032 pvop->op_next = (OP*)pvop;
3033 pvop->op_flags = flags;
22c35a8c 3034 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3035 scalar((OP*)pvop);
22c35a8c 3036 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3037 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3038 return CHECKOP(type, pvop);
79072805
LW		 3039}
3040
79072805 3041void
864dbfa3 3042Perl_package(pTHX_ OP *o)
79072805 3043{
11343788 3044 dTHR;
93a17b20 3045 SV *sv;
79072805 3046
3280af22
NIS		 3047 save_hptr(&PL_curstash);
3048 save_item(PL_curstname);
11343788 3049 if (o) {
463ee0b2
LW		 3050 STRLEN len;
3051 char *name;
11343788 3052 sv = cSVOPo->op_sv;
463ee0b2 3053 name = SvPV(sv, len);
3280af22
NIS		 3054 PL_curstash = gv_stashpvn(name,len,TRUE);
3055 sv_setpvn(PL_curstname, name, len);
11343788 3056 op_free(o);
93a17b20
LW		 3057 }
3058 else {
3280af22
NIS		 3059 sv_setpv(PL_curstname,"<none>");
3060 PL_curstash = Nullhv;
93a17b20 3061 }
7ad382f4 3062 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3063 PL_copline = NOLINE;
3064 PL_expect = XSTATE;
79072805
LW		 3065}
3066
85e6fe83 3067void
864dbfa3 3068Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3069{
a0d0e21e
LW		 3070 OP *pack;
3071 OP *meth;
3072 OP *rqop;
3073 OP *imop;
b1cb66bf 3074 OP *veop;
78ca652e 3075 GV *gv;
85e6fe83 3076
a0d0e21e 3077 if (id->op_type != OP_CONST)
cea2e8a9 3078 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3079
b1cb66bf 3080 veop = Nullop;
3081
3082 if(version != Nullop) {
3083 SV *vesv = ((SVOP*)version)->op_sv;
3084
3085 if (arg == Nullop && !SvNIOK(vesv)) {
3086 arg = version;
3087 }
3088 else {
3089 OP *pack;
b1cb66bf 3090
3091 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 3092 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3093
3094 /* Make copy of id so we don't free it twice */
3095 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3096
3097 /* Fake up a method call to VERSION */
b1cb66bf 3098 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3099 append_elem(OP_LIST,
3100 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 3101 newSVOP(OP_METHOD_NAMED, 0,
3102 newSVpvn("VERSION", 7))));
b1cb66bf 3103 }
3104 }
aeea060c 3105
a0d0e21e 3106 /* Fake up an import/unimport */
4633a7c4
LW		 3107 if (arg && arg->op_type == OP_STUB)
3108 imop = arg; /* no import on explicit () */
b1cb66bf 3109 else if(SvNIOK(((SVOP*)id)->op_sv)) {
3110 imop = Nullop; /* use 5.0; */
3111 }
4633a7c4
LW		 3112 else {
3113 /* Make copy of id so we don't free it twice */
3114 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 3115 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 3116 append_elem(OP_LIST,
3117 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 3118 newSVOP(OP_METHOD_NAMED, 0,
3119 aver ? newSVpvn("import", 6)
3120 : newSVpvn("unimport", 8))));
4633a7c4
LW		 3121 }
3122
78ca652e
GS		 3123 /* Fake up a require, handle override, if any */
3124 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3125 if (!(gv && GvIMPORTED_CV(gv)))
3126 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3127
3128 if (gv && GvIMPORTED_CV(gv)) {
3129 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3130 append_elem(OP_LIST, id,
3131 scalar(newUNOP(OP_RV2CV, 0,
3132 newGVOP(OP_GV, 0,
3133 gv))))));
3134 }
3135 else {
3136 rqop = newUNOP(OP_REQUIRE, 0, id);
3137 }
a0d0e21e
LW		 3138
3139 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3140 newATTRSUB(floor,
79cb57f6 3141 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3142 Nullop,
09bef843 3143 Nullop,
a0d0e21e 3144 append_elem(OP_LINESEQ,
b1cb66bf 3145 append_elem(OP_LINESEQ,
3146 newSTATEOP(0, Nullch, rqop),
3147 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3148 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3149
c305c6a0 3150 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3151 PL_copline = NOLINE;
3152 PL_expect = XSTATE;
85e6fe83
LW		 3153}
3154
79072805 3155OP *
864dbfa3 3156Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3157{
3158 OP *doop;
3159 GV *gv;
3160
3161 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3162 if (!(gv && GvIMPORTED_CV(gv)))
3163 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3164
3165 if (gv && GvIMPORTED_CV(gv)) {
3166 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3167 append_elem(OP_LIST, term,
3168 scalar(newUNOP(OP_RV2CV, 0,
3169 newGVOP(OP_GV, 0,
3170 gv))))));
3171 }
3172 else {
3173 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3174 }
3175 return doop;
3176}
3177
3178OP *
864dbfa3 3179Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3180{
3181 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3182 list(force_list(subscript)),
3183 list(force_list(listval)) );
79072805
LW		 3184}
3185
76e3520e 3186STATIC I32
cea2e8a9 3187S_list_assignment(pTHX_ register OP *o)
79072805 3188{
11343788 3189 if (!o)
79072805
LW		 3190 return TRUE;
3191
11343788
MB		 3192 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3193 o = cUNOPo->op_first;
79072805 3194
11343788 3195 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3196 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3197 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3198
3199 if (t && f)
3200 return TRUE;
3201 if (t || f)
3202 yyerror("Assignment to both a list and a scalar");
3203 return FALSE;
3204 }
3205
11343788
MB		 3206 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3207 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3208 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3209 return TRUE;
3210
11343788 3211 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3212 return TRUE;
3213
11343788 3214 if (o->op_type == OP_RV2SV)
79072805
LW		 3215 return FALSE;
3216
3217 return FALSE;
3218}
3219
3220OP *
864dbfa3 3221Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3222{
11343788 3223 OP *o;
79072805 3224
a0d0e21e
LW		 3225 if (optype) {
3226 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3227 return newLOGOP(optype, 0,
3228 mod(scalar(left), optype),
3229 newUNOP(OP_SASSIGN, 0, scalar(right)));
3230 }
3231 else {
3232 return newBINOP(optype, OPf_STACKED,
3233 mod(scalar(left), optype), scalar(right));
3234 }
3235 }
3236
79072805 3237 if (list_assignment(left)) {
6ee623d5 3238 dTHR;
3280af22
NIS		 3239 PL_modcount = 0;
3240 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3241 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3242 if (PL_eval_start)
3243 PL_eval_start = 0;
748a9306 3244 else {
a0d0e21e
LW		 3245 op_free(left);
3246 op_free(right);
3247 return Nullop;
3248 }
11343788 3249 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3250 list(force_list(right)),
3251 list(force_list(left)) );
11343788 3252 o->op_private = 0 | (flags >> 8);
a0d0e21e 3253 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3254 OP *curop;
11343788 3255 OP *lastop = o;
3280af22 3256 PL_generation++;
11343788 3257 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3258 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3259 if (curop->op_type == OP_GV) {
638eceb6 3260 GV *gv = cGVOPx_gv(curop);
3280af22 3261 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3262 break;
3280af22 3263 SvCUR(gv) = PL_generation;
79072805 3264 }
748a9306
LW		 3265 else if (curop->op_type == OP_PADSV ||
3266 curop->op_type == OP_PADAV ||
3267 curop->op_type == OP_PADHV ||
3268 curop->op_type == OP_PADANY) {
3280af22 3269 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3270 SV *sv = svp[curop->op_targ];
3280af22 3271 if (SvCUR(sv) == PL_generation)
748a9306 3272 break;
3280af22 3273 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3274 }
79072805
LW		 3275 else if (curop->op_type == OP_RV2CV)
3276 break;
3277 else if (curop->op_type == OP_RV2SV ||
3278 curop->op_type == OP_RV2AV ||
3279 curop->op_type == OP_RV2HV ||
3280 curop->op_type == OP_RV2GV) {
3281 if (lastop->op_type != OP_GV) /* funny deref? */
3282 break;
3283 }
1167e5da
SM		 3284 else if (curop->op_type == OP_PUSHRE) {
3285 if (((PMOP*)curop)->op_pmreplroot) {
3286 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3287 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3288 break;
3280af22 3289 SvCUR(gv) = PL_generation;
1167e5da
SM		 3290 }
3291 }
79072805
LW		 3292 else
3293 break;
3294 }
3295 lastop = curop;
3296 }
11343788
MB		 3297 if (curop != o)
3298 o->op_private = OPpASSIGN_COMMON;
79072805 3299 }
c07a80fd 3300 if (right && right->op_type == OP_SPLIT) {
3301 OP* tmpop;
3302 if ((tmpop = ((LISTOP*)right)->op_first) &&
3303 tmpop->op_type == OP_PUSHRE)
3304 {
3305 PMOP *pm = (PMOP*)tmpop;
3306 if (left->op_type == OP_RV2AV &&
3307 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3308 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3309 {
3310 tmpop = ((UNOP*)left)->op_first;
3311 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3312#ifdef USE_ITHREADS
3313 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3314 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3315#else
3316 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3317 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3318#endif
c07a80fd 3319 pm->op_pmflags |= PMf_ONCE;
11343788 3320 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3321 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3322 tmpop->op_sibling = Nullop; /* don't free split */
3323 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3324 op_free(o); /* blow off assign */
54310121 3325 right->op_flags &= ~OPf_WANT;
a5f75d66 3326 /* "I don't know and I don't care." */
c07a80fd 3327 return right;
3328 }
3329 }
3330 else {
3280af22 3331 if (PL_modcount < 10000 &&
c07a80fd 3332 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3333 {
3334 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3335 if (SvIVX(sv) == 0)
3280af22 3336 sv_setiv(sv, PL_modcount+1);
c07a80fd 3337 }
3338 }
3339 }
3340 }
11343788 3341 return o;
79072805
LW		 3342 }
3343 if (!right)
3344 right = newOP(OP_UNDEF, 0);
3345 if (right->op_type == OP_READLINE) {
3346 right->op_flags |= OPf_STACKED;
463ee0b2 3347 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3348 }
a0d0e21e 3349 else {
3280af22 3350 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3351 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3352 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3353 if (PL_eval_start)
3354 PL_eval_start = 0;
748a9306 3355 else {
11343788 3356 op_free(o);
a0d0e21e
LW		 3357 return Nullop;
3358 }
3359 }
11343788 3360 return o;
79072805
LW		 3361}
3362
3363OP *
864dbfa3 3364Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3365{
11343788 3366 dTHR;
bbce6d69 3367 U32 seq = intro_my();
79072805
LW		 3368 register COP *cop;
3369
b7dc083c 3370 NewOp(1101, cop, 1, COP);
57843af0 3371 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3372 cop->op_type = OP_DBSTATE;
22c35a8c 3373 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3374 }
3375 else {
3376 cop->op_type = OP_NEXTSTATE;
22c35a8c 3377 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3378 }
79072805 3379 cop->op_flags = flags;
a0ed51b3 3380 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3381#ifdef NATIVE_HINTS
3382 cop->op_private |= NATIVE_HINTS;
3383#endif
e24b16f9 3384 PL_compiling.op_private = cop->op_private;
79072805
LW		 3385 cop->op_next = (OP*)cop;
3386
463ee0b2
LW		 3387 if (label) {
3388 cop->cop_label = label;
3280af22 3389 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3390 }
bbce6d69 3391 cop->cop_seq = seq;
3280af22 3392 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3393 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3394 cop->cop_warnings = PL_curcop->cop_warnings ;
3395 else
3396 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3397
79072805 3398
3280af22 3399 if (PL_copline == NOLINE)
57843af0 3400 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3401 else {
57843af0 3402 CopLINE_set(cop, PL_copline);
3280af22 3403 PL_copline = NOLINE;
79072805 3404 }
57843af0
GS		 3405#ifdef USE_ITHREADS
3406 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3407#else
cc49e20b 3408 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3409#endif
11faa288 3410 CopSTASH_set(cop, PL_curstash);
79072805 3411
3280af22 3412 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3413 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3414 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3415 (void)SvIOK_on(*svp);
57b2e452 3416 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3417 }
3418 }
3419
11343788 3420 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3421}
3422
bbce6d69 3423/* "Introduce" my variables to visible status. */
3424U32
864dbfa3 3425Perl_intro_my(pTHX)
bbce6d69 3426{
3427 SV **svp;
3428 SV *sv;
3429 I32 i;
3430
3280af22
NIS		 3431 if (! PL_min_intro_pending)
3432 return PL_cop_seqmax;
bbce6d69 3433
3280af22
NIS		 3434 svp = AvARRAY(PL_comppad_name);
3435 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3436 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3437 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3438 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3439 }
3440 }
3280af22
NIS		 3441 PL_min_intro_pending = 0;
3442 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3443 return PL_cop_seqmax++;
bbce6d69 3444}
3445
79072805 3446OP *
864dbfa3 3447Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3448{
883ffac3
CS		 3449 return new_logop(type, flags, &first, &other);
3450}
3451
3bd495df 3452STATIC OP *
cea2e8a9 3453S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3454{
11343788 3455 dTHR;
79072805 3456 LOGOP *logop;
11343788 3457 OP *o;
883ffac3
CS		 3458 OP *first = *firstp;
3459 OP *other = *otherp;
79072805 3460
a0d0e21e
LW		 3461 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3462 return newBINOP(type, flags, scalar(first), scalar(other));
3463
8990e307 3464 scalarboolean(first);
79072805
LW		 3465 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3466 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3467 if (type == OP_AND || type == OP_OR) {
3468 if (type == OP_AND)
3469 type = OP_OR;
3470 else
3471 type = OP_AND;
11343788 3472 o = first;
883ffac3 3473 first = *firstp = cUNOPo->op_first;
11343788
MB		 3474 if (o->op_next)
3475 first->op_next = o->op_next;
3476 cUNOPo->op_first = Nullop;
3477 op_free(o);
79072805
LW		 3478 }
3479 }
3480 if (first->op_type == OP_CONST) {
599cee73 3481 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3482 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3483 PL_op_desc[type]);
79072805
LW		 3484 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3485 op_free(first);
883ffac3 3486 *firstp = Nullop;
79072805
LW		 3487 return other;
3488 }
3489 else {
3490 op_free(other);
883ffac3 3491 *otherp = Nullop;
79072805
LW		 3492 return first;
3493 }
3494 }
3495 else if (first->op_type == OP_WANTARRAY) {
3496 if (type == OP_AND)
3497 list(other);
3498 else
3499 scalar(other);
3500 }
599cee73 3501 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3502 OP *k1 = ((UNOP*)first)->op_first;
3503 OP *k2 = k1->op_sibling;
3504 OPCODE warnop = 0;
3505 switch (first->op_type)
3506 {
3507 case OP_NULL:
3508 if (k2 && k2->op_type == OP_READLINE
3509 && (k2->op_flags & OPf_STACKED)
55d729e4 3510 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3511 {
a6006777 3512 warnop = k2->op_type;
72b16652 3513 }
a6006777 3514 break;
3515
3516 case OP_SASSIGN:
68dc0745 3517 if (k1->op_type == OP_READDIR
3518 || k1->op_type == OP_GLOB
72b16652 3519 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3520 || k1->op_type == OP_EACH)
72b16652
GS		 3521 {
3522 warnop = ((k1->op_type == OP_NULL)
3523 ? k1->op_targ : k1->op_type);
3524 }
a6006777 3525 break;
3526 }
8ebc5c01 3527 if (warnop) {
57843af0
GS		 3528 line_t oldline = CopLINE(PL_curcop);
3529 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 3530 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3531 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3532 PL_op_desc[warnop],
68dc0745 3533 ((warnop == OP_READLINE || warnop == OP_GLOB)
3534 ? " construct" : "() operator"));
57843af0 3535 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3536 }
a6006777 3537 }
79072805
LW		 3538
3539 if (!other)
3540 return first;
3541
a0d0e21e
LW		 3542 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3543 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3544
b7dc083c 3545 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3546
3547 logop->op_type = type;
22c35a8c 3548 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3549 logop->op_first = first;
3550 logop->op_flags = flags | OPf_KIDS;
3551 logop->op_other = LINKLIST(other);
c07a80fd 3552 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3553
3554 /* establish postfix order */
3555 logop->op_next = LINKLIST(first);
3556 first->op_next = (OP*)logop;
3557 first->op_sibling = other;
3558
11343788
MB		 3559 o = newUNOP(OP_NULL, 0, (OP*)logop);
3560 other->op_next = o;
79072805 3561
11343788 3562 return o;
79072805
LW		 3563}
3564
3565OP *
864dbfa3 3566Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3567{
11343788 3568 dTHR;
1a67a97c
SM		 3569 LOGOP *logop;
3570 OP *start;
11343788 3571 OP *o;
79072805 3572
b1cb66bf 3573 if (!falseop)
3574 return newLOGOP(OP_AND, 0, first, trueop);
3575 if (!trueop)
3576 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3577
8990e307 3578 scalarboolean(first);
79072805
LW		 3579 if (first->op_type == OP_CONST) {
3580 if (SvTRUE(((SVOP*)first)->op_sv)) {
3581 op_free(first);
b1cb66bf 3582 op_free(falseop);
3583 return trueop;
79072805
LW		 3584 }
3585 else {
3586 op_free(first);
b1cb66bf 3587 op_free(trueop);
3588 return falseop;
79072805
LW		 3589 }
3590 }
3591 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3592 list(trueop);
3593 scalar(falseop);
79072805 3594 }
1a67a97c
SM		 3595 NewOp(1101, logop, 1, LOGOP);
3596 logop->op_type = OP_COND_EXPR;
3597 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3598 logop->op_first = first;
3599 logop->op_flags = flags | OPf_KIDS;
3600 logop->op_private = 1 | (flags >> 8);
3601 logop->op_other = LINKLIST(trueop);
3602 logop->op_next = LINKLIST(falseop);
79072805 3603
79072805
LW		 3604
3605 /* establish postfix order */
1a67a97c
SM		 3606 start = LINKLIST(first);
3607 first->op_next = (OP*)logop;
79072805 3608
b1cb66bf 3609 first->op_sibling = trueop;
3610 trueop->op_sibling = falseop;
1a67a97c 3611 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3612
1a67a97c 3613 trueop->op_next = falseop->op_next = o;
79072805 3614
1a67a97c 3615 o->op_next = start;
11343788 3616 return o;
79072805
LW		 3617}
3618
3619OP *
864dbfa3 3620Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3621{
b35b2403 3622 dTHR;
1a67a97c 3623 LOGOP *range;
79072805
LW		 3624 OP *flip;
3625 OP *flop;
1a67a97c 3626 OP *leftstart;
11343788 3627 OP *o;
79072805 3628
1a67a97c 3629 NewOp(1101, range, 1, LOGOP);
79072805 3630
1a67a97c
SM		 3631 range->op_type = OP_RANGE;
3632 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3633 range->op_first = left;
3634 range->op_flags = OPf_KIDS;
3635 leftstart = LINKLIST(left);
3636 range->op_other = LINKLIST(right);
3637 range->op_private = 1 | (flags >> 8);
79072805
LW		 3638
3639 left->op_sibling = right;
3640
1a67a97c
SM		 3641 range->op_next = (OP*)range;
3642 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3643 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3644 o = newUNOP(OP_NULL, 0, flop);
79072805 3645 linklist(flop);
1a67a97c 3646 range->op_next = leftstart;
79072805
LW		 3647
3648 left->op_next = flip;
3649 right->op_next = flop;
3650
1a67a97c
SM		 3651 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3652 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3653 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3654 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3655
3656 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3657 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3658
11343788 3659 flip->op_next = o;
79072805 3660 if (!flip->op_private || !flop->op_private)
11343788 3661 linklist(o); /* blow off optimizer unless constant */
79072805 3662
11343788 3663 return o;
79072805
LW		 3664}
3665
3666OP *
864dbfa3 3667Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3668{
11343788 3669 dTHR;
463ee0b2 3670 OP* listop;
11343788 3671 OP* o;
463ee0b2 3672 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3673 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3674
463ee0b2
LW		 3675 if (expr) {
3676 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3677 return block; /* do {} while 0 does once */
fb73857a 3678 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3679 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3680 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3681 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3682 } else if (expr->op_flags & OPf_KIDS) {
3683 OP *k1 = ((UNOP*)expr)->op_first;
3684 OP *k2 = (k1) ? k1->op_sibling : NULL;
3685 switch (expr->op_type) {
3686 case OP_NULL:
3687 if (k2 && k2->op_type == OP_READLINE
3688 && (k2->op_flags & OPf_STACKED)
3689 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3690 expr = newUNOP(OP_DEFINED, 0, expr);
3691 break;
3692
3693 case OP_SASSIGN:
3694 if (k1->op_type == OP_READDIR
3695 || k1->op_type == OP_GLOB
72b16652 3696 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3697 || k1->op_type == OP_EACH)
3698 expr = newUNOP(OP_DEFINED, 0, expr);
3699 break;
3700 }
774d564b 3701 }
463ee0b2 3702 }
93a17b20 3703
8990e307 3704 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3705 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3706
883ffac3
CS		 3707 if (listop)
3708 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3709
11343788
MB		 3710 if (once && o != listop)
3711 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3712
11343788
MB		 3713 if (o == listop)
3714 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3715
11343788
MB		 3716 o->op_flags |= flags;
3717 o = scope(o);
3718 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3719 return o;
79072805
LW		 3720}
3721
3722OP *
864dbfa3 3723Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3724{
11343788 3725 dTHR;
79072805
LW		 3726 OP *redo;
3727 OP *next = 0;
3728 OP *listop;
11343788 3729 OP *o;
79072805
LW		 3730 OP *condop;
3731
fb73857a 3732 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3733 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3734 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3735 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3736 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3737 OP *k1 = ((UNOP*)expr)->op_first;
3738 OP *k2 = (k1) ? k1->op_sibling : NULL;
3739 switch (expr->op_type) {
3740 case OP_NULL:
3741 if (k2 && k2->op_type == OP_READLINE
3742 && (k2->op_flags & OPf_STACKED)
3743 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3744 expr = newUNOP(OP_DEFINED, 0, expr);
3745 break;
3746
3747 case OP_SASSIGN:
3748 if (k1->op_type == OP_READDIR
3749 || k1->op_type == OP_GLOB
72b16652 3750 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3751 || k1->op_type == OP_EACH)
3752 expr = newUNOP(OP_DEFINED, 0, expr);
3753 break;
3754 }
748a9306 3755 }
79072805
LW		 3756
3757 if (!block)
3758 block = newOP(OP_NULL, 0);
3759
3760 if (cont)
3761 next = LINKLIST(cont);
fb73857a 3762 if (expr) {
79072805 3763 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3764 if ((line_t)whileline != NOLINE) {
3280af22 3765 PL_copline = whileline;
fb73857a 3766 cont = append_elem(OP_LINESEQ, cont,
3767 newSTATEOP(0, Nullch, Nullop));
3768 }
3769 }
79072805 3770
463ee0b2 3771 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3772 redo = LINKLIST(listop);
3773
3774 if (expr) {
3280af22 3775 PL_copline = whileline;
883ffac3
CS		 3776 scalar(listop);
3777 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3778 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3779 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3780 op_free((OP*)loop);
883ffac3 3781 return Nullop; /* listop already freed by new_logop */
463ee0b2 3782 }
883ffac3
CS		 3783 if (listop)
3784 ((LISTOP*)listop)->op_last->op_next = condop =
3785 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3786 if (!next)
3787 next = condop;
3788 }
3789 else
11343788 3790 o = listop;
79072805
LW		 3791
3792 if (!loop) {
b7dc083c 3793 NewOp(1101,loop,1,LOOP);
79072805 3794 loop->op_type = OP_ENTERLOOP;
22c35a8c 3795 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3796 loop->op_private = 0;
3797 loop->op_next = (OP*)loop;
3798 }
3799
11343788 3800 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3801
3802 loop->op_redoop = redo;
11343788 3803 loop->op_lastop = o;
79072805
LW		 3804
3805 if (next)
3806 loop->op_nextop = next;
3807 else
11343788 3808 loop->op_nextop = o;
79072805 3809
11343788
MB		 3810 o->op_flags |= flags;
3811 o->op_private |= (flags >> 8);
3812 return o;
79072805
LW		 3813}
3814
3815OP *
864dbfa3 3816Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3817{
3818 LOOP *loop;
b7dc083c 3819 LOOP *tmp;
fb73857a 3820 OP *wop;
85e6fe83 3821 int padoff = 0;
4633a7c4 3822 I32 iterflags = 0;
79072805 3823
79072805 3824 if (sv) {
85e6fe83 3825 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3826 sv->op_type = OP_RV2GV;
22c35a8c 3827 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3828 }
85e6fe83
LW		 3829 else if (sv->op_type == OP_PADSV) { /* private variable */
3830 padoff = sv->op_targ;
743e66e6 3831 sv->op_targ = 0;
85e6fe83
LW		 3832 op_free(sv);
3833 sv = Nullop;
3834 }
54b9620d
MB		 3835 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3836 padoff = sv->op_targ;
743e66e6 3837 sv->op_targ = 0;
54b9620d
MB		 3838 iterflags |= OPf_SPECIAL;
3839 op_free(sv);
3840 sv = Nullop;
3841 }
79072805 3842 else
cea2e8a9 3843 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3844 }
3845 else {
54b9620d
MB		 3846#ifdef USE_THREADS
3847 padoff = find_threadsv("_");
3848 iterflags |= OPf_SPECIAL;
3849#else
3280af22 3850 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3851#endif
79072805 3852 }
5f05dabc 3853 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3854 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3855 iterflags |= OPf_STACKED;
3856 }
89ea2908
GA		 3857 else if (expr->op_type == OP_NULL &&
3858 (expr->op_flags & OPf_KIDS) &&
3859 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3860 {
3861 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3862 * set the STACKED flag to indicate that these values are to be
3863 * treated as min/max values by 'pp_iterinit'.
3864 */
3865 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3866 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3867 OP* left = range->op_first;
3868 OP* right = left->op_sibling;
5152d7c7 3869 LISTOP* listop;
89ea2908
GA		 3870
3871 range->op_flags &= ~OPf_KIDS;
3872 range->op_first = Nullop;
3873
5152d7c7 3874 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3875 listop->op_first->op_next = range->op_next;
3876 left->op_next = range->op_other;
5152d7c7
GS		 3877 right->op_next = (OP*)listop;
3878 listop->op_next = listop->op_first;
89ea2908
GA		 3879
3880 op_free(expr);
5152d7c7 3881 expr = (OP*)(listop);
89ea2908
GA		 3882 null(expr);
3883 iterflags |= OPf_STACKED;
3884 }
3885 else {
3886 expr = mod(force_list(expr), OP_GREPSTART);
3887 }
3888
3889
4633a7c4 3890 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3891 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3892 assert(!loop->op_next);
b7dc083c
NIS		 3893#ifdef PL_OP_SLAB_ALLOC
3894 NewOp(1234,tmp,1,LOOP);
3895 Copy(loop,tmp,1,LOOP);
3896 loop = tmp;
3897#else
85e6fe83 3898 Renew(loop, 1, LOOP);
b7dc083c 3899#endif
85e6fe83 3900 loop->op_targ = padoff;
fb73857a 3901 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3902 PL_copline = forline;
fb73857a 3903 return newSTATEOP(0, label, wop);
79072805
LW		 3904}
3905
8990e307 3906OP*
864dbfa3 3907Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3908{
11343788
MB		 3909 dTHR;
3910 OP *o;
2d8e6c8d
GS		 3911 STRLEN n_a;
3912
8990e307 3913 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3914 /* "last()" means "last" */
3915 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3916 o = newOP(type, OPf_SPECIAL);
3917 else {
3918 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3919 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3920 : ""));
3921 }
8990e307
LW		 3922 op_free(label);
3923 }
3924 else {
a0d0e21e
LW		 3925 if (label->op_type == OP_ENTERSUB)
3926 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3927 o = newUNOP(type, OPf_STACKED, label);
8990e307 3928 }
3280af22 3929 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3930 return o;
8990e307
LW		 3931}
3932
79072805 3933void
864dbfa3 3934Perl_cv_undef(pTHX_ CV *cv)
79072805 3935{
11343788
MB		 3936 dTHR;
3937#ifdef USE_THREADS
e858de61
MB		 3938 if (CvMUTEXP(cv)) {
3939 MUTEX_DESTROY(CvMUTEXP(cv));
3940 Safefree(CvMUTEXP(cv));
3941 CvMUTEXP(cv) = 0;
3942 }
11343788
MB		 3943#endif /* USE_THREADS */
3944
a0d0e21e 3945 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3946#ifdef USE_THREADS
3947 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3948 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3949#else
a0d0e21e 3950 if (CvDEPTH(cv))
cea2e8a9 3951 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3952#endif /* USE_THREADS */
8990e307 3953 ENTER;
a0d0e21e 3954
7766f137 3955 SAVEVPTR(PL_curpad);
3280af22 3956 PL_curpad = 0;
a0d0e21e 3957
a5f75d66 3958 if (!CvCLONED(cv))
748a9306 3959 op_free(CvROOT(cv));
79072805 3960 CvROOT(cv) = Nullop;
8990e307 3961 LEAVE;
79072805 3962 }
1d5db326 3963 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3964 CvFLAGS(cv) = 0;
8e07c86e
AD		 3965 SvREFCNT_dec(CvGV(cv));
3966 CvGV(cv) = Nullgv;
3967 SvREFCNT_dec(CvOUTSIDE(cv));
3968 CvOUTSIDE(cv) = Nullcv;
3969 if (CvPADLIST(cv)) {
8ebc5c01 3970 /* may be during global destruction */
3971 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3972 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3973 while (i >= 0) {
3974 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3975 SV* sv = svp ? *svp : Nullsv;
3976 if (!sv)
3977 continue;
3280af22
NIS		 3978 if (sv == (SV*)PL_comppad_name)
3979 PL_comppad_name = Nullav;
3980 else if (sv == (SV*)PL_comppad) {
3981 PL_comppad = Nullav;
3982 PL_curpad = Null(SV**);
46fc3d4c 3983 }
3984 SvREFCNT_dec(sv);
8ebc5c01 3985 }
3986 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3987 }
8e07c86e
AD		 3988 CvPADLIST(cv) = Nullav;
3989 }
79072805
LW		 3990}
3991
76e3520e 3992STATIC void
743e66e6 3993S_cv_dump(pTHX_ CV *cv)
5f05dabc 3994{
62fde642 3995#ifdef DEBUGGING
5f05dabc 3996 CV *outside = CvOUTSIDE(cv);
3997 AV* padlist = CvPADLIST(cv);
4fdae800 3998 AV* pad_name;
3999 AV* pad;
4000 SV** pname;
4001 SV** ppad;
5f05dabc 4002 I32 ix;
4003
b900a521
JH		 4004 PerlIO_printf(Perl_debug_log,
4005 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4006 PTR2UV(cv),
ab50184a 4007 (CvANON(cv) ? "ANON"
6b88bc9c 4008 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4009 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4010 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4011 PTR2UV(outside),
ab50184a
CS		 4012 (!outside ? "null"
4013 : CvANON(outside) ? "ANON"
6b88bc9c 4014 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4015 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4016 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4017
4fdae800 4018 if (!padlist)
4019 return;
4020
4021 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4022 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4023 pname = AvARRAY(pad_name);
4024 ppad = AvARRAY(pad);
4025
93965878 4026 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4027 if (SvPOK(pname[ix]))
b900a521
JH		 4028 PerlIO_printf(Perl_debug_log,
4029 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4030 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4031 SvFAKE(pname[ix]) ? "FAKE " : "",
4032 SvPVX(pname[ix]),
b900a521
JH		 4033 (IV)I_32(SvNVX(pname[ix])),
4034 SvIVX(pname[ix]));
5f05dabc 4035 }
743e66e6 4036#endif /* DEBUGGING */
62fde642 4037}
5f05dabc 4038
76e3520e 4039STATIC CV *
cea2e8a9 4040S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4041{
11343788 4042 dTHR;
748a9306
LW		 4043 AV* av;
4044 I32 ix;
4045 AV* protopadlist = CvPADLIST(proto);
4046 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4047 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4048 SV** pname = AvARRAY(protopad_name);
4049 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4050 I32 fname = AvFILLp(protopad_name);
4051 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4052 AV* comppadlist;
4053 CV* cv;
4054
07055b4c
CS		 4055 assert(!CvUNIQUE(proto));
4056
748a9306 4057 ENTER;
7766f137 4058 SAVEVPTR(PL_curpad);
3280af22
NIS		 4059 SAVESPTR(PL_comppad);
4060 SAVESPTR(PL_comppad_name);
4061 SAVESPTR(PL_compcv);
748a9306 4062
3280af22 4063 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4064 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 4065 CvCLONED_on(cv);
5f05dabc 4066 if (CvANON(proto))
4067 CvANON_on(cv);
748a9306 4068
11343788 4069#ifdef USE_THREADS
12ca11f6 4070 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4071 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4072 CvOWNER(cv) = 0;
4073#endif /* USE_THREADS */
57843af0 4074 CvFILE(cv) = CvFILE(proto);
44a8e56a 4075 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4076 CvSTASH(cv) = CvSTASH(proto);
4077 CvROOT(cv) = CvROOT(proto);
4078 CvSTART(cv) = CvSTART(proto);
5f05dabc 4079 if (outside)
4080 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4081
68dc0745 4082 if (SvPOK(proto))
4083 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4084
3280af22 4085 PL_comppad_name = newAV();
46fc3d4c 4086 for (ix = fname; ix >= 0; ix--)
3280af22 4087 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4088
3280af22 4089 PL_comppad = newAV();
748a9306
LW		 4090
4091 comppadlist = newAV();
4092 AvREAL_off(comppadlist);
3280af22
NIS		 4093 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4094 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4095 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4096 av_fill(PL_comppad, AvFILLp(protopad));
4097 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4098
4099 av = newAV(); /* will be @_ */
4100 av_extend(av, 0);
3280af22 4101 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4102 AvFLAGS(av) = AVf_REIFY;
4103
9607fc9c 4104 for (ix = fpad; ix > 0; ix--) {
4105 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4106 if (namesv && namesv != &PL_sv_undef) {
aa689395 4107 char *name = SvPVX(namesv); /* XXX */
4108 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4109 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4110 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4111 if (!off)
3280af22 4112 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4113 else if (off != ix)
cea2e8a9 4114 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4115 }
4116 else { /* our own lexical */
aa689395 4117 SV* sv;
5f05dabc 4118 if (*name == '&') {
4119 /* anon code -- we'll come back for it */
4120 sv = SvREFCNT_inc(ppad[ix]);
4121 }
4122 else if (*name == '@')
4123 sv = (SV*)newAV();
748a9306 4124 else if (*name == '%')
5f05dabc 4125 sv = (SV*)newHV();
748a9306 4126 else
5f05dabc 4127 sv = NEWSV(0,0);
4128 if (!SvPADBUSY(sv))
4129 SvPADMY_on(sv);
3280af22 4130 PL_curpad[ix] = sv;
748a9306
LW		 4131 }
4132 }
7766f137 4133 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4134 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4135 }
748a9306 4136 else {
aa689395 4137 SV* sv = NEWSV(0,0);
748a9306 4138 SvPADTMP_on(sv);
3280af22 4139 PL_curpad[ix] = sv;
748a9306
LW		 4140 }
4141 }
4142
5f05dabc 4143 /* Now that vars are all in place, clone nested closures. */
4144
9607fc9c 4145 for (ix = fpad; ix > 0; ix--) {
4146 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4147 if (namesv
3280af22 4148 && namesv != &PL_sv_undef
aa689395 4149 && !(SvFLAGS(namesv) & SVf_FAKE)
4150 && *SvPVX(namesv) == '&'
5f05dabc 4151 && CvCLONE(ppad[ix]))
4152 {
4153 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4154 SvREFCNT_dec(ppad[ix]);
4155 CvCLONE_on(kid);
4156 SvPADMY_on(kid);
3280af22 4157 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4158 }
4159 }
4160
5f05dabc 4161#ifdef DEBUG_CLOSURES
ab50184a
CS		 4162 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4163 cv_dump(outside);
4164 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4165 cv_dump(proto);
ab50184a 4166 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4167 cv_dump(cv);
4168#endif
4169
748a9306
LW		 4170 LEAVE;
4171 return cv;
4172}
4173
4174CV *
864dbfa3 4175Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4176{
b099ddc0 4177 CV *cv;
1feb2720 4178 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4179 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4180 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4181 return cv;
5f05dabc 4182}
4183
3fe9a6f1 4184void
864dbfa3 4185Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4186{
0453d815
PM		 4187 dTHR;
4188
f248d071 4189 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 4190 SV* msg = sv_newmortal();
3fe9a6f1 4191 SV* name = Nullsv;
4192
4193 if (gv)
46fc3d4c 4194 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4195 sv_setpv(msg, "Prototype mismatch:");
4196 if (name)
894356b3 4197 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4198 if (SvPOK(cv))
cea2e8a9 4199 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4200 sv_catpv(msg, " vs ");
4201 if (p)
cea2e8a9 4202 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4203 else
4204 sv_catpv(msg, "none");
894356b3 4205 Perl_warner(aTHX_ WARN_UNSAFE, "%"SVf, msg);
3fe9a6f1 4206 }
4207}
4208
760ac839 4209SV *
864dbfa3 4210Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4211{
54310121 4212 if (!cv || !SvPOK(cv) || SvCUR(cv))
4213 return Nullsv;
fe5e78ed
GS		 4214 return op_const_sv(CvSTART(cv), cv);
4215}
760ac839 4216
fe5e78ed 4217SV *
864dbfa3 4218Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4219{
4220 SV *sv = Nullsv;
4221
4222 if(!o)
4223 return Nullsv;
4224
4225 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
4226 o = cLISTOPo->op_first->op_sibling;
4227
4228 for (; o; o = o->op_next) {
54310121 4229 OPCODE type = o->op_type;
fe5e78ed 4230
acb36ea4 4231 if (sv && o->op_next == o)
fe5e78ed 4232 return sv;
54310121 4233 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4234 continue;
4235 if (type == OP_LEAVESUB || type == OP_RETURN)
4236 break;
4237 if (sv)
4238 return Nullsv;
7766f137 4239 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4240 sv = cSVOPo->op_sv;
7766f137 4241 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4242 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4243 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4244 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4245 return Nullsv;
760ac839 4246 }
54310121 4247 else
4248 return Nullsv;
760ac839 4249 }
5aabfad6 4250 if (sv)
4251 SvREADONLY_on(sv);
760ac839
LW		 4252 return sv;
4253}
4254
09bef843
SB		 4255void
4256Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4257{
4258 if (o)
4259 SAVEFREEOP(o);
4260 if (proto)
4261 SAVEFREEOP(proto);
4262 if (attrs)
4263 SAVEFREEOP(attrs);
4264 if (block)
4265 SAVEFREEOP(block);
4266 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4267}
4268
748a9306 4269CV *
864dbfa3 4270Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4271{
09bef843
SB		 4272 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4273}
4274
4275CV *
4276Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4277{
11343788 4278 dTHR;
2d8e6c8d
GS		 4279 STRLEN n_a;
4280 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4 4281 GV *gv = gv_fetchpv(name ? name : "__ANON__",
09bef843
SB		 4282 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4283 SVt_PVCV);
2d8e6c8d 4284 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4285 register CV *cv=0;
a0d0e21e 4286 I32 ix;
79072805 4287
11343788 4288 if (o)
5dc0d613 4289 SAVEFREEOP(o);
3fe9a6f1 4290 if (proto)
4291 SAVEFREEOP(proto);
09bef843
SB		 4292 if (attrs)
4293 SAVEFREEOP(attrs);
3fe9a6f1 4294
09bef843 4295 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4296 maximum a prototype before. */
4297 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4298 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4299 && ckWARN_d(WARN_UNSAFE))
4300 {
0453d815 4301 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4302 }
55d729e4
GS		 4303 cv_ckproto((CV*)gv, NULL, ps);
4304 }
4305 if (ps)
4306 sv_setpv((SV*)gv, ps);
4307 else
4308 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4309 SvREFCNT_dec(PL_compcv);
4310 cv = PL_compcv = NULL;
4311 PL_sub_generation++;
55d729e4
GS		 4312 goto noblock;
4313 }
4314
68dc0745 4315 if (!name || GvCVGEN(gv))
4316 cv = Nullcv;
4317 else if (cv = GvCV(gv)) {
3fe9a6f1 4318 cv_ckproto(cv, gv, ps);
68dc0745 4319 /* already defined (or promised)? */
4320 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4321 SV* const_sv;
fe5e78ed 4322 bool const_changed = TRUE;
09bef843 4323 if (!block && !attrs) {
aa689395 4324 /* just a "sub foo;" when &foo is already defined */
3280af22 4325 SAVEFREESV(PL_compcv);
aa689395 4326 goto done;
4327 }
7bac28a0 4328 /* ahem, death to those who redefine active sort subs */
3280af22 4329 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4330 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4331 if (!block)
4332 goto withattrs;
fe5e78ed
GS		 4333 if(const_sv = cv_const_sv(cv))
4334 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4335 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4336 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4337 && HvNAME(GvSTASH(CvGV(cv)))
4338 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
4339 "autouse"))) {
57843af0
GS		 4340 line_t oldline = CopLINE(PL_curcop);
4341 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4342 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4343 const_sv ? "Constant subroutine %s redefined"
09bef843 4344 : "Subroutine %s redefined", name);
57843af0 4345 CopLINE_set(PL_curcop, oldline);
79072805 4346 }
8990e307 4347 SvREFCNT_dec(cv);
68dc0745 4348 cv = Nullcv;
79072805
LW		 4349 }
4350 }
09bef843
SB		 4351 withattrs:
4352 if (attrs) {
4353 HV *stash;
4354 SV *rcv;
4355
4356 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4357 * before we clobber PL_compcv.
4358 */
4359 if (cv && !block) {
4360 rcv = (SV*)cv;
4361 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4362 stash = GvSTASH(CvGV(cv));
4363 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4364 stash = CvSTASH(cv);
4365 else
4366 stash = PL_curstash;
4367 }
4368 else {
4369 /* possibly about to re-define existing subr -- ignore old cv */
4370 rcv = (SV*)PL_compcv;
4371 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4372 stash = GvSTASH(gv);
4373 else
4374 stash = PL_curstash;
4375 }
4376 apply_attrs(stash, rcv, attrs);
4377 }
a0d0e21e 4378 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4379 if (!block) {
4380 /* got here with just attrs -- work done, so bug out */
4381 SAVEFREESV(PL_compcv);
4382 goto done;
4383 }
4633a7c4 4384 cv_undef(cv);
3280af22
NIS		 4385 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4386 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4387 CvOUTSIDE(PL_compcv) = 0;
4388 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4389 CvPADLIST(PL_compcv) = 0;
4390 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4391 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4392 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4393 }
4394 else {
3280af22 4395 cv = PL_compcv;
44a8e56a 4396 if (name) {
4397 GvCV(gv) = cv;
4398 GvCVGEN(gv) = 0;
3280af22 4399 PL_sub_generation++;
44a8e56a 4400 }
a0d0e21e 4401 }
44a8e56a 4402 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4403 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4404 CvSTASH(cv) = PL_curstash;
11343788
MB		 4405#ifdef USE_THREADS
4406 CvOWNER(cv) = 0;
1cfa4ec7 4407 if (!CvMUTEXP(cv)) {
f6aaf501 4408 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4409 MUTEX_INIT(CvMUTEXP(cv));
4410 }
11343788 4411#endif /* USE_THREADS */
8990e307 4412
3fe9a6f1 4413 if (ps)
4414 sv_setpv((SV*)cv, ps);
4633a7c4 4415
3280af22 4416 if (PL_error_count) {
c07a80fd 4417 op_free(block);
4418 block = Nullop;
68dc0745 4419 if (name) {
4420 char *s = strrchr(name, ':');
4421 s = s ? s+1 : name;
6d4c2119
CS		 4422 if (strEQ(s, "BEGIN")) {
4423 char *not_safe =
4424 "BEGIN not safe after errors--compilation aborted";
faef0170 4425 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4426 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4427 else {
4428 /* force display of errors found but not reported */
38a03e6e 4429 sv_catpv(ERRSV, not_safe);
cea2e8a9 4430 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4431 }
4432 }
68dc0745 4433 }
c07a80fd 4434 }
a0d0e21e 4435 if (!block) {
55d729e4 4436 noblock:
3280af22 4437 PL_copline = NOLINE;
a0d0e21e
LW		 4438 LEAVE_SCOPE(floor);
4439 return cv;
4440 }
4441
3280af22
NIS		 4442 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4443 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4444
7766f137
GS		 4445 if (CvLVALUE(cv)) {
4446 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4447 }
4448 else {
4449 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4450 }
4451 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4452 OpREFCNT_set(CvROOT(cv), 1);
4453 CvSTART(cv) = LINKLIST(CvROOT(cv));
4454 CvROOT(cv)->op_next = 0;
4455 peep(CvSTART(cv));
4456
4457 /* now that optimizer has done its work, adjust pad values */
54310121 4458 if (CvCLONE(cv)) {
3280af22
NIS		 4459 SV **namep = AvARRAY(PL_comppad_name);
4460 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4461 SV *namesv;
4462
7766f137 4463 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4464 continue;
4465 /*
4466 * The only things that a clonable function needs in its
4467 * pad are references to outer lexicals and anonymous subs.
4468 * The rest are created anew during cloning.
4469 */
4470 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4471 namesv != &PL_sv_undef &&
54310121 4472 (SvFAKE(namesv) ||
4473 *SvPVX(namesv) == '&')))
4474 {
3280af22
NIS		 4475 SvREFCNT_dec(PL_curpad[ix]);
4476 PL_curpad[ix] = Nullsv;
54310121 4477 }
4478 }
a0d0e21e 4479 }
54310121 4480 else {
4481 AV *av = newAV(); /* Will be @_ */
4482 av_extend(av, 0);
3280af22 4483 av_store(PL_comppad, 0, (SV*)av);
54310121 4484 AvFLAGS(av) = AVf_REIFY;
79072805 4485
3280af22 4486 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4487 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4488 continue;
3280af22
NIS		 4489 if (!SvPADMY(PL_curpad[ix]))
4490 SvPADTMP_on(PL_curpad[ix]);
54310121 4491 }
4492 }
79072805 4493
44a8e56a 4494 if (name) {
4495 char *s;
4496
3280af22 4497 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4498 SV *sv = NEWSV(0,0);
44a8e56a 4499 SV *tmpstr = sv_newmortal();
549bb64a 4500 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4501 CV *cv;
4502 HV *hv;
4503
ed094faf
GS		 4504 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4505 CopFILE(PL_curcop),
cc49e20b 4506 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4507 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4508 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4509 hv = GvHVn(db_postponed);
9607fc9c 4510 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4511 && (cv = GvCV(db_postponed))) {
44a8e56a 4512 dSP;
924508f0 4513 PUSHMARK(SP);
44a8e56a 4514 XPUSHs(tmpstr);
4515 PUTBACK;
864dbfa3 4516 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4517 }
4518 }
79072805 4519
44a8e56a 4520 if ((s = strrchr(name,':')))
28757baa 4521 s++;
4522 else
4523 s = name;
ed094faf
GS		 4524
4525 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4526 goto done;
4527
68dc0745 4528 if (strEQ(s, "BEGIN")) {
3280af22 4529 I32 oldscope = PL_scopestack_ix;
28757baa 4530 ENTER;
57843af0
GS		 4531 SAVECOPFILE(&PL_compiling);
4532 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4533 save_svref(&PL_rs);
4534 sv_setsv(PL_rs, PL_nrs);
28757baa 4535
3280af22
NIS		 4536 if (!PL_beginav)
4537 PL_beginav = newAV();
28757baa 4538 DEBUG_x( dump_sub(gv) );
ed094faf 4539 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4540 GvCV(gv) = 0;
3280af22 4541 call_list(oldscope, PL_beginav);
a6006777 4542
3280af22 4543 PL_curcop = &PL_compiling;
a0ed51b3 4544 PL_compiling.op_private = PL_hints;
28757baa 4545 LEAVE;
4546 }
3280af22
NIS		 4547 else if (strEQ(s, "END") && !PL_error_count) {
4548 if (!PL_endav)
4549 PL_endav = newAV();
ed094faf 4550 DEBUG_x( dump_sub(gv) );
3280af22 4551 av_unshift(PL_endav, 1);
ed094faf 4552 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4553 GvCV(gv) = 0;
4554 }
4f25aa18
GS		 4555 else if (strEQ(s, "STOP") && !PL_error_count) {
4556 if (!PL_stopav)
4557 PL_stopav = newAV();
ed094faf 4558 DEBUG_x( dump_sub(gv) );
4f25aa18 4559 av_unshift(PL_stopav, 1);
ed094faf 4560 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4561 GvCV(gv) = 0;
4562 }
3280af22
NIS		 4563 else if (strEQ(s, "INIT") && !PL_error_count) {
4564 if (!PL_initav)
4565 PL_initav = newAV();
ed094faf 4566 DEBUG_x( dump_sub(gv) );
3280af22 4567 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4568 GvCV(gv) = 0;
ae77835f 4569 }
79072805 4570 }
a6006777 4571
aa689395 4572 done:
3280af22 4573 PL_copline = NOLINE;
8990e307 4574 LEAVE_SCOPE(floor);
a0d0e21e 4575 return cv;
79072805
LW		 4576}
4577
b099ddc0 4578/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4579void
864dbfa3 4580Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4581{
4582 dTHR;
5476c433 4583
11faa288
GS		 4584 ENTER;
4585 SAVECOPLINE(PL_curcop);
4586 SAVEHINTS();
4587
4588 CopLINE_set(PL_curcop, PL_copline);
3280af22 4589 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4590
4591 if (stash) {
4592 SAVESPTR(PL_curstash);
4593 SAVECOPSTASH(PL_curcop);
4594 PL_curstash = stash;
4595#ifdef USE_ITHREADS
4596 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4597#else
4598 CopSTASH(PL_curcop) = stash;
4599#endif
4600 }
5476c433 4601
09bef843 4602 newATTRSUB(
be24f278 4603 start_subparse(FALSE, 0),
5476c433 4604 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4605 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4606 Nullop,
5476c433
JD		 4607 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4608 );
4609
11faa288 4610 LEAVE;
5476c433
JD		 4611}
4612
57d3b86d 4613CV *
864dbfa3 4614Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4615{
11343788 4616 dTHR;
44a8e56a 4617 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4618 register CV *cv;
44a8e56a 4619
4620 if (cv = (name ? GvCV(gv) : Nullcv)) {
4621 if (GvCVGEN(gv)) {
4622 /* just a cached method */
4623 SvREFCNT_dec(cv);
4624 cv = 0;
4625 }
4626 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4627 /* already defined (or promised) */
599cee73 4628 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4629 && HvNAME(GvSTASH(CvGV(cv)))
4630 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4631 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4632 if (PL_copline != NOLINE)
57843af0 4633 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4634 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4635 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4636 }
4637 SvREFCNT_dec(cv);
4638 cv = 0;
79072805 4639 }
79072805 4640 }
44a8e56a 4641
4642 if (cv) /* must reuse cv if autoloaded */
4643 cv_undef(cv);
a0d0e21e
LW		 4644 else {
4645 cv = (CV*)NEWSV(1105,0);
4646 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4647 if (name) {
4648 GvCV(gv) = cv;
4649 GvCVGEN(gv) = 0;
3280af22 4650 PL_sub_generation++;
44a8e56a 4651 }
a0d0e21e 4652 }
5196be3e 4653 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4654#ifdef USE_THREADS
12ca11f6 4655 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4656 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4657 CvOWNER(cv) = 0;
4658#endif /* USE_THREADS */
b195d487 4659 (void)gv_fetchfile(filename);
57843af0
GS		 4660 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4661 an external constant string */
a0d0e21e 4662 CvXSUB(cv) = subaddr;
44a8e56a 4663
28757baa 4664 if (name) {
4665 char *s = strrchr(name,':');
4666 if (s)
4667 s++;
4668 else
4669 s = name;
ed094faf
GS		 4670
4671 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4672 goto done;
4673
28757baa 4674 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4675 if (!PL_beginav)
4676 PL_beginav = newAV();
ed094faf 4677 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4678 GvCV(gv) = 0;
28757baa 4679 }
4680 else if (strEQ(s, "END")) {
3280af22
NIS		 4681 if (!PL_endav)
4682 PL_endav = newAV();
4683 av_unshift(PL_endav, 1);
ed094faf 4684 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4685 GvCV(gv) = 0;
28757baa 4686 }
4f25aa18
GS		 4687 else if (strEQ(s, "STOP")) {
4688 if (!PL_stopav)
4689 PL_stopav = newAV();
4690 av_unshift(PL_stopav, 1);
ed094faf 4691 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4692 GvCV(gv) = 0;
4693 }
7d07dbc2 4694 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4695 if (!PL_initav)
4696 PL_initav = newAV();
ed094faf 4697 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4698 GvCV(gv) = 0;
ae77835f 4699 }
28757baa 4700 }
8990e307 4701 else
a5f75d66 4702 CvANON_on(cv);
44a8e56a 4703
ed094faf 4704done:
a0d0e21e 4705 return cv;
79072805
LW		 4706}
4707
4708void
864dbfa3 4709Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4710{
11343788 4711 dTHR;
79072805
LW		 4712 register CV *cv;
4713 char *name;
4714 GV *gv;
a0d0e21e 4715 I32 ix;
2d8e6c8d 4716 STRLEN n_a;
79072805 4717
11343788 4718 if (o)
2d8e6c8d 4719 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4720 else
4721 name = "STDOUT";
85e6fe83 4722 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4723 GvMULTI_on(gv);
79072805 4724 if (cv = GvFORM(gv)) {
599cee73 4725 if (ckWARN(WARN_REDEFINE)) {
57843af0 4726 line_t oldline = CopLINE(PL_curcop);
79072805 4727
57843af0 4728 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4729 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4730 CopLINE_set(PL_curcop, oldline);
79072805 4731 }
8990e307 4732 SvREFCNT_dec(cv);
79072805 4733 }
3280af22 4734 cv = PL_compcv;
79072805 4735 GvFORM(gv) = cv;
44a8e56a 4736 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4737 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4738
3280af22
NIS		 4739 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4740 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4741 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4742 }
4743
79072805 4744 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4745 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4746 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4747 CvSTART(cv) = LINKLIST(CvROOT(cv));
4748 CvROOT(cv)->op_next = 0;
4749 peep(CvSTART(cv));
11343788 4750 op_free(o);
3280af22 4751 PL_copline = NOLINE;
8990e307 4752 LEAVE_SCOPE(floor);
79072805
LW		 4753}
4754
4755OP *
864dbfa3 4756Perl_newANONLIST(pTHX_ OP *o)
79072805 4757{
93a17b20 4758 return newUNOP(OP_REFGEN, 0,
11343788 4759 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4760}
4761
4762OP *
864dbfa3 4763Perl_newANONHASH(pTHX_ OP *o)
79072805 4764{
93a17b20 4765 return newUNOP(OP_REFGEN, 0,
11343788 4766 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4767}
4768
4769OP *
864dbfa3 4770Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4771{
09bef843
SB		 4772 return newANONATTRSUB(floor, proto, Nullop, block);
4773}
4774
4775OP *
4776Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4777{
a0d0e21e 4778 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4779 newSVOP(OP_ANONCODE, 0,
4780 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4781}
4782
4783OP *
864dbfa3 4784Perl_oopsAV(pTHX_ OP *o)
79072805 4785{
ed6116ce
LW		 4786 switch (o->op_type) {
4787 case OP_PADSV:
4788 o->op_type = OP_PADAV;
22c35a8c 4789 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4790 return ref(o, OP_RV2AV);
ed6116ce
LW		 4791
4792 case OP_RV2SV:
79072805 4793 o->op_type = OP_RV2AV;
22c35a8c 4794 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4795 ref(o, OP_RV2AV);
ed6116ce
LW		 4796 break;
4797
4798 default:
0453d815
PM		 4799 if (ckWARN_d(WARN_INTERNAL))
4800 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4801 break;
4802 }
79072805
LW		 4803 return o;
4804}
4805
4806OP *
864dbfa3 4807Perl_oopsHV(pTHX_ OP *o)
79072805 4808{
0453d815 4809 dTHR;
0453d815 4810
ed6116ce
LW		 4811 switch (o->op_type) {
4812 case OP_PADSV:
4813 case OP_PADAV:
4814 o->op_type = OP_PADHV;
22c35a8c 4815 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4816 return ref(o, OP_RV2HV);
ed6116ce
LW		 4817
4818 case OP_RV2SV:
4819 case OP_RV2AV:
79072805 4820 o->op_type = OP_RV2HV;
22c35a8c 4821 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4822 ref(o, OP_RV2HV);
ed6116ce
LW		 4823 break;
4824
4825 default:
0453d815
PM		 4826 if (ckWARN_d(WARN_INTERNAL))
4827 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4828 break;
4829 }
79072805
LW		 4830 return o;
4831}
4832
4833OP *
864dbfa3 4834Perl_newAVREF(pTHX_ OP *o)
79072805 4835{
ed6116ce
LW		 4836 if (o->op_type == OP_PADANY) {
4837 o->op_type = OP_PADAV;
22c35a8c 4838 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4839 return o;
ed6116ce 4840 }
79072805
LW		 4841 return newUNOP(OP_RV2AV, 0, scalar(o));
4842}
4843
4844OP *
864dbfa3 4845Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4846{
82092f1d 4847 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4848 return newUNOP(OP_NULL, 0, o);
748a9306 4849 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4850}
4851
4852OP *
864dbfa3 4853Perl_newHVREF(pTHX_ OP *o)
79072805 4854{
ed6116ce
LW		 4855 if (o->op_type == OP_PADANY) {
4856 o->op_type = OP_PADHV;
22c35a8c 4857 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4858 return o;
ed6116ce 4859 }
79072805
LW		 4860 return newUNOP(OP_RV2HV, 0, scalar(o));
4861}
4862
4863OP *
864dbfa3 4864Perl_oopsCV(pTHX_ OP *o)
79072805 4865{
cea2e8a9 4866 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4867 /* STUB */
4868 return o;
4869}
4870
4871OP *
864dbfa3 4872Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4873{
c07a80fd 4874 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4875}
4876
4877OP *
864dbfa3 4878Perl_newSVREF(pTHX_ OP *o)
79072805 4879{
ed6116ce
LW		 4880 if (o->op_type == OP_PADANY) {
4881 o->op_type = OP_PADSV;
22c35a8c 4882 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4883 return o;
ed6116ce 4884 }
224a4551
MB		 4885 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4886 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4887 return o;
224a4551 4888 }
79072805
LW		 4889 return newUNOP(OP_RV2SV, 0, scalar(o));
4890}
4891
4892/* Check routines. */
4893
4894OP *
cea2e8a9 4895Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4896{
178c6305
CS		 4897 PADOFFSET ix;
4898 SV* name;
4899
4900 name = NEWSV(1106,0);
4901 sv_upgrade(name, SVt_PVNV);
4902 sv_setpvn(name, "&", 1);
4903 SvIVX(name) = -1;
4904 SvNVX(name) = 1;
5dc0d613 4905 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4906 av_store(PL_comppad_name, ix, name);
4907 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4908 SvPADMY_on(cSVOPo->op_sv);
4909 cSVOPo->op_sv = Nullsv;
4910 cSVOPo->op_targ = ix;
4911 return o;
5f05dabc 4912}
4913
4914OP *
cea2e8a9 4915Perl_ck_bitop(pTHX_ OP *o)
55497cff 4916{
3280af22 4917 o->op_private = PL_hints;
5dc0d613 4918 return o;
55497cff 4919}
4920
4921OP *
cea2e8a9 4922Perl_ck_concat(pTHX_ OP *o)
79072805 4923{
11343788
MB		 4924 if (cUNOPo->op_first->op_type == OP_CONCAT)
4925 o->op_flags |= OPf_STACKED;
4926 return o;
79072805
LW		 4927}
4928
4929OP *
cea2e8a9 4930Perl_ck_spair(pTHX_ OP *o)
79072805 4931{
11343788 4932 if (o->op_flags & OPf_KIDS) {
79072805 4933 OP* newop;
a0d0e21e 4934 OP* kid;
5dc0d613
MB		 4935 OPCODE type = o->op_type;
4936 o = modkids(ck_fun(o), type);
11343788 4937 kid = cUNOPo->op_first;
a0d0e21e
LW		 4938 newop = kUNOP->op_first->op_sibling;
4939 if (newop &&
4940 (newop->op_sibling ||
22c35a8c 4941 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4942 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4943 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4944
11343788 4945 return o;
a0d0e21e
LW		 4946 }
4947 op_free(kUNOP->op_first);
4948 kUNOP->op_first = newop;
4949 }
22c35a8c 4950 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4951 return ck_fun(o);
a0d0e21e
LW		 4952}
4953
4954OP *
cea2e8a9 4955Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4956{
11343788 4957 o = ck_fun(o);
5dc0d613 4958 o->op_private = 0;
11343788
MB		 4959 if (o->op_flags & OPf_KIDS) {
4960 OP *kid = cUNOPo->op_first;
01020589
GS		 4961 switch (kid->op_type) {
4962 case OP_ASLICE:
4963 o->op_flags |= OPf_SPECIAL;
4964 /* FALL THROUGH */
4965 case OP_HSLICE:
5dc0d613 4966 o->op_private |= OPpSLICE;
01020589
GS		 4967 break;
4968 case OP_AELEM:
4969 o->op_flags |= OPf_SPECIAL;
4970 /* FALL THROUGH */
4971 case OP_HELEM:
4972 break;
4973 default:
4974 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 4975 PL_op_desc[o->op_type]);
01020589 4976 }
a0d0e21e 4977 null(kid);
79072805 4978 }
11343788 4979 return o;
79072805
LW		 4980}
4981
4982OP *
cea2e8a9 4983Perl_ck_eof(pTHX_ OP *o)
79072805 4984{
11343788 4985 I32 type = o->op_type;
79072805 4986
11343788
MB		 4987 if (o->op_flags & OPf_KIDS) {
4988 if (cLISTOPo->op_first->op_type == OP_STUB) {
4989 op_free(o);
4990 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4991 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4992 }
11343788 4993 return ck_fun(o);
79072805 4994 }
11343788 4995 return o;
79072805
LW		 4996}
4997
4998OP *
cea2e8a9 4999Perl_ck_eval(pTHX_ OP *o)
79072805 5000{
3280af22 5001 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5002 if (o->op_flags & OPf_KIDS) {
5003 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5004
93a17b20 5005 if (!kid) {
11343788
MB		 5006 o->op_flags &= ~OPf_KIDS;
5007 null(o);
79072805
LW		 5008 }
5009 else if (kid->op_type == OP_LINESEQ) {
5010 LOGOP *enter;
5011
11343788
MB		 5012 kid->op_next = o->op_next;
5013 cUNOPo->op_first = 0;
5014 op_free(o);
79072805 5015
b7dc083c 5016 NewOp(1101, enter, 1, LOGOP);
79072805 5017 enter->op_type = OP_ENTERTRY;
22c35a8c 5018 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5019 enter->op_private = 0;
5020
5021 /* establish postfix order */
5022 enter->op_next = (OP*)enter;
5023
11343788
MB		 5024 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5025 o->op_type = OP_LEAVETRY;
22c35a8c 5026 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5027 enter->op_other = o;
5028 return o;
79072805 5029 }
c7cc6f1c 5030 else
473986ff 5031 scalar((OP*)kid);
79072805
LW		 5032 }
5033 else {
11343788 5034 op_free(o);
54b9620d 5035 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5036 }
3280af22 5037 o->op_targ = (PADOFFSET)PL_hints;
11343788 5038 return o;
79072805
LW		 5039}
5040
5041OP *
cea2e8a9 5042Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5043{
5044 OP *kid;
11343788
MB		 5045 if (o->op_flags & OPf_STACKED) {
5046 o = ck_fun(o);
5047 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5048 if (kid->op_type == OP_RV2GV)
5049 null(kid);
79072805 5050 }
463ee0b2 5051 else
11343788
MB		 5052 o = listkids(o);
5053 return o;
79072805
LW		 5054}
5055
5056OP *
cea2e8a9 5057Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5058{
5196be3e
MB		 5059 o = ck_fun(o);
5060 if (o->op_flags & OPf_KIDS) {
5061 OP *kid = cUNOPo->op_first;
afebc493
GS		 5062 if (kid->op_type == OP_ENTERSUB) {
5063 (void) ref(kid, o->op_type);
5064 if (kid->op_type != OP_RV2CV && !PL_error_count)
5065 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5066 PL_op_desc[o->op_type]);
5067 o->op_private |= OPpEXISTS_SUB;
5068 }
5069 else if (kid->op_type == OP_AELEM)
01020589
GS		 5070 o->op_flags |= OPf_SPECIAL;
5071 else if (kid->op_type != OP_HELEM)
5072 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5073 PL_op_desc[o->op_type]);
5f05dabc 5074 null(kid);
5075 }
5196be3e 5076 return o;
5f05dabc 5077}
5078
22c35a8c 5079#if 0
5f05dabc 5080OP *
cea2e8a9 5081Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5082{
5083 o = fold_constants(o);
5084 if (o->op_type == OP_CONST)
5085 o->op_type = OP_GV;
5086 return o;
5087}
22c35a8c 5088#endif
79072805
LW		 5089
5090OP *
cea2e8a9 5091Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5092{
11343788
MB		 5093 dTHR;
5094 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5095
3280af22 5096 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5097 if (kid->op_type == OP_CONST) {
44a8e56a 5098 char *name;
5099 int iscv;
5100 GV *gv;
779c5bc9 5101 SV *kidsv = kid->op_sv;
2d8e6c8d 5102 STRLEN n_a;
44a8e56a 5103
779c5bc9
GS		 5104 /* Is it a constant from cv_const_sv()? */
5105 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5106 SV *rsv = SvRV(kidsv);
5107 int svtype = SvTYPE(rsv);
5108 char *badtype = Nullch;
5109
5110 switch (o->op_type) {
5111 case OP_RV2SV:
5112 if (svtype > SVt_PVMG)
5113 badtype = "a SCALAR";
5114 break;
5115 case OP_RV2AV:
5116 if (svtype != SVt_PVAV)
5117 badtype = "an ARRAY";
5118 break;
5119 case OP_RV2HV:
5120 if (svtype != SVt_PVHV) {
5121 if (svtype == SVt_PVAV) { /* pseudohash? */
5122 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5123 if (ksv && SvROK(*ksv)
5124 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5125 {
5126 break;
5127 }
5128 }
5129 badtype = "a HASH";
5130 }
5131 break;
5132 case OP_RV2CV:
5133 if (svtype != SVt_PVCV)
5134 badtype = "a CODE";
5135 break;
5136 }
5137 if (badtype)
cea2e8a9 5138 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5139 return o;
5140 }
2d8e6c8d 5141 name = SvPV(kidsv, n_a);
3280af22 5142 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5143 char *badthing = Nullch;
5dc0d613 5144 switch (o->op_type) {
44a8e56a 5145 case OP_RV2SV:
5146 badthing = "a SCALAR";
5147 break;
5148 case OP_RV2AV:
5149 badthing = "an ARRAY";
5150 break;
5151 case OP_RV2HV:
5152 badthing = "a HASH";
5153 break;
5154 }
5155 if (badthing)
cea2e8a9 5156 Perl_croak(aTHX_
44a8e56a 5157 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5158 name, badthing);
5159 }
93233ece
CS		 5160 /*
5161 * This is a little tricky. We only want to add the symbol if we
5162 * didn't add it in the lexer. Otherwise we get duplicate strict
5163 * warnings. But if we didn't add it in the lexer, we must at
5164 * least pretend like we wanted to add it even if it existed before,
5165 * or we get possible typo warnings. OPpCONST_ENTERED says
5166 * whether the lexer already added THIS instance of this symbol.
5167 */
5196be3e 5168 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5169 do {
44a8e56a 5170 gv = gv_fetchpv(name,
748a9306 5171 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5172 iscv
5173 ? SVt_PVCV
11343788 5174 : o->op_type == OP_RV2SV
a0d0e21e 5175 ? SVt_PV
11343788 5176 : o->op_type == OP_RV2AV
a0d0e21e 5177 ? SVt_PVAV
11343788 5178 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5179 ? SVt_PVHV
5180 : SVt_PVGV);
93233ece
CS		 5181 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5182 if (gv) {
5183 kid->op_type = OP_GV;
5184 SvREFCNT_dec(kid->op_sv);
350de78d 5185#ifdef USE_ITHREADS
638eceb6 5186 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5187 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5188 GvIN_PAD_on(gv);
350de78d
GS		 5189 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5190#else
93233ece 5191 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5192#endif
76cd736e 5193 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5194 }
79072805 5195 }
11343788 5196 return o;
79072805
LW		 5197}
5198
5199OP *
cea2e8a9 5200Perl_ck_ftst(pTHX_ OP *o)
79072805 5201{
11343788
MB		 5202 dTHR;
5203 I32 type = o->op_type;
79072805 5204
d0dca557
JD		 5205 if (o->op_flags & OPf_REF) {
5206 /* nothing */
5207 }
5208 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5209 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5210
5211 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5212 STRLEN n_a;
a0d0e21e 5213 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5214 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5215 op_free(o);
d0dca557 5216 o = newop;
79072805
LW		 5217 }
5218 }
5219 else {
11343788 5220 op_free(o);
79072805 5221 if (type == OP_FTTTY)
d0dca557 5222 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5223 SVt_PVIO));
79072805 5224 else
d0dca557 5225 o = newUNOP(type, 0, newDEFSVOP());
79072805 5226 }
d0dca557
JD		 5227#ifdef USE_LOCALE
5228 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5229 o->op_private = 0;
5230 if (PL_hints & HINT_LOCALE)
5231 o->op_private |= OPpLOCALE;
5232 }
5233#endif
11343788 5234 return o;
79072805
LW		 5235}
5236
5237OP *
cea2e8a9 5238Perl_ck_fun(pTHX_ OP *o)
79072805 5239{
11343788 5240 dTHR;
79072805
LW		 5241 register OP *kid;
5242 OP **tokid;
5243 OP *sibl;
5244 I32 numargs = 0;
11343788 5245 int type = o->op_type;
22c35a8c 5246 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5247
11343788 5248 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5249 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5250 oa &= ~OA_OPTIONAL;
5251 else
11343788 5252 return no_fh_allowed(o);
79072805
LW		 5253 }
5254
11343788 5255 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5256 STRLEN n_a;
11343788
MB		 5257 tokid = &cLISTOPo->op_first;
5258 kid = cLISTOPo->op_first;
8990e307
LW		 5259 if (kid->op_type == OP_PUSHMARK ||
5260 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
5261 {
79072805
LW		 5262 tokid = &kid->op_sibling;
5263 kid = kid->op_sibling;
5264 }
22c35a8c 5265 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5266 *tokid = kid = newDEFSVOP();
79072805
LW		 5267
5268 while (oa && kid) {
5269 numargs++;
5270 sibl = kid->op_sibling;
5271 switch (oa & 7) {
5272 case OA_SCALAR:
62c18ce2
GS		 5273 /* list seen where single (scalar) arg expected? */
5274 if (numargs == 1 && !(oa >> 4)
5275 && kid->op_type == OP_LIST && type != OP_SCALAR)
5276 {
5277 return too_many_arguments(o,PL_op_desc[type]);
5278 }
79072805
LW		 5279 scalar(kid);
5280 break;
5281 case OA_LIST:
5282 if (oa < 16) {
5283 kid = 0;
5284 continue;
5285 }
5286 else
5287 list(kid);
5288 break;
5289 case OA_AVREF:
5290 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5291 (kid->op_private & OPpCONST_BARE))
5292 {
2d8e6c8d 5293 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5294 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5295 gv_fetchpv(name, TRUE, SVt_PVAV) ));
b9c39e73 5296 if (ckWARN(WARN_SYNTAX))
cf2093f6 5297 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5298 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5299 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5300 op_free(kid);
5301 kid = newop;
5302 kid->op_sibling = sibl;
5303 *tokid = kid;
5304 }
8990e307 5305 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5306 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5307 mod(kid, type);
79072805
LW		 5308 break;
5309 case OA_HVREF:
5310 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5311 (kid->op_private & OPpCONST_BARE))
5312 {
2d8e6c8d 5313 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5314 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5315 gv_fetchpv(name, TRUE, SVt_PVHV) ));
b9c39e73 5316 if (ckWARN(WARN_SYNTAX))
cf2093f6 5317 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5318 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5319 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5320 op_free(kid);
5321 kid = newop;
5322 kid->op_sibling = sibl;
5323 *tokid = kid;
5324 }
8990e307 5325 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5326 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5327 mod(kid, type);
79072805
LW		 5328 break;
5329 case OA_CVREF:
5330 {
a0d0e21e 5331 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5332 kid->op_sibling = 0;
5333 linklist(kid);
5334 newop->op_next = newop;
5335 kid = newop;
5336 kid->op_sibling = sibl;
5337 *tokid = kid;
5338 }
5339 break;
5340 case OA_FILEREF:
c340be78 5341 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5342 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5343 (kid->op_private & OPpCONST_BARE))
5344 {
79072805 5345 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5346 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5347 SVt_PVIO) );
79072805
LW		 5348 op_free(kid);
5349 kid = newop;
5350 }
1ea32a52
GS		 5351 else if (kid->op_type == OP_READLINE) {
5352 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5353 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5354 }
79072805 5355 else {
35cd451c 5356 I32 flags = OPf_SPECIAL;
a6c40364 5357 I32 priv = 0;
2c8ac474
GS		 5358 PADOFFSET targ = 0;
5359
35cd451c 5360 /* is this op a FH constructor? */
853846ea 5361 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5362 char *name = Nullch;
5363 STRLEN len;
5364
5365 flags = 0;
5366 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5367 * need to "prove" flag does not mean something
5368 * else already - NI-S 1999/05/07
2c8ac474
GS		 5369 */
5370 priv = OPpDEREF;
5371 if (kid->op_type == OP_PADSV) {
5372 SV **namep = av_fetch(PL_comppad_name,
5373 kid->op_targ, 4);
5374 if (namep && *namep)
5375 name = SvPV(*namep, len);
5376 }
5377 else if (kid->op_type == OP_RV2SV
5378 && kUNOP->op_first->op_type == OP_GV)
5379 {
5380 GV *gv = cGVOPx_gv(kUNOP->op_first);
5381 name = GvNAME(gv);
5382 len = GvNAMELEN(gv);
5383 }
5384 if (name) {
5385 SV *namesv;
5386 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5387 namesv = PL_curpad[targ];
5388 SvUPGRADE(namesv, SVt_PV);
5389 if (*name != '$')
5390 sv_setpvn(namesv, "$", 1);
5391 sv_catpvn(namesv, name, len);
5392 }
853846ea 5393 }
79072805 5394 kid->op_sibling = 0;
35cd451c 5395 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5396 kid->op_targ = targ;
5397 kid->op_private |= priv;
79072805
LW		 5398 }
5399 kid->op_sibling = sibl;
5400 *tokid = kid;
5401 }
5402 scalar(kid);
5403 break;
5404 case OA_SCALARREF:
a0d0e21e 5405 mod(scalar(kid), type);
79072805
LW		 5406 break;
5407 }
5408 oa >>= 4;
5409 tokid = &kid->op_sibling;
5410 kid = kid->op_sibling;
5411 }
11343788 5412 o->op_private |= numargs;
79072805 5413 if (kid)
22c35a8c 5414 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5415 listkids(o);
79072805 5416 }
22c35a8c 5417 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5418 op_free(o);
54b9620d 5419 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5420 }
5421
79072805
LW		 5422 if (oa) {
5423 while (oa & OA_OPTIONAL)
5424 oa >>= 4;
5425 if (oa && oa != OA_LIST)
22c35a8c 5426 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5427 }
11343788 5428 return o;
79072805
LW		 5429}
5430
5431OP *
cea2e8a9 5432Perl_ck_glob(pTHX_ OP *o)
79072805 5433{
fb73857a 5434 GV *gv;
5435
1f2bfc8a 5436 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5437 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5438
5439 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5440 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5441
52bb0670 5442#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5443 /* XXX this can be tightened up and made more failsafe. */
5444 if (!gv) {
5445 OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
5446 modname->op_private |= OPpCONST_BARE;
5447 ENTER;
5448 utilize(1, start_subparse(FALSE, 0), Nullop, modname,
220398a0 5449 newSVOP(OP_CONST, 0, newSVpvn(":globally", 9)));
72b16652
GS		 5450 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5451 LEAVE;
5452 }
52bb0670 5453#endif /* PERL_EXTERNAL_GLOB */
72b16652 5454
b1cb66bf 5455 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5456 append_elem(OP_GLOB, o,
80252599 5457 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5458 o->op_type = OP_LIST;
22c35a8c 5459 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5460 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5461 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5462 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5463 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5464 scalar(newUNOP(OP_RV2CV, 0,
5465 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5466 o = newUNOP(OP_NULL, 0, ck_subr(o));
5467 o->op_targ = OP_GLOB; /* hint at what it used to be */
5468 return o;
b1cb66bf 5469 }
5470 gv = newGVgen("main");
a0d0e21e 5471 gv_IOadd(gv);
11343788
MB		 5472 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5473 scalarkids(o);
5474 return ck_fun(o);
79072805
LW		 5475}
5476
5477OP *
cea2e8a9 5478Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5479{
5480 LOGOP *gwop;
5481 OP *kid;
11343788 5482 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5483
22c35a8c 5484 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5485 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5486
11343788 5487 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5488 OP* k;
11343788
MB		 5489 o = ck_sort(o);
5490 kid = cLISTOPo->op_first->op_sibling;
5491 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5492 kid = k;
5493 }
5494 kid->op_next = (OP*)gwop;
11343788 5495 o->op_flags &= ~OPf_STACKED;
93a17b20 5496 }
11343788 5497 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5498 if (type == OP_MAPWHILE)
5499 list(kid);
5500 else
5501 scalar(kid);
11343788 5502 o = ck_fun(o);
3280af22 5503 if (PL_error_count)
11343788 5504 return o;
aeea060c 5505 kid = cLISTOPo->op_first->op_sibling;
79072805 5506 if (kid->op_type != OP_NULL)
cea2e8a9 5507 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5508 kid = kUNOP->op_first;
5509
a0d0e21e 5510 gwop->op_type = type;
22c35a8c 5511 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5512 gwop->op_first = listkids(o);
79072805
LW		 5513 gwop->op_flags |= OPf_KIDS;
5514 gwop->op_private = 1;
5515 gwop->op_other = LINKLIST(kid);
a0d0e21e 5516 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5517 kid->op_next = (OP*)gwop;
5518
11343788 5519 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5520 if (!kid || !kid->op_sibling)
22c35a8c 5521 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5522 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5523 mod(kid, OP_GREPSTART);
5524
79072805
LW		 5525 return (OP*)gwop;
5526}
5527
5528OP *
cea2e8a9 5529Perl_ck_index(pTHX_ OP *o)
79072805 5530{
11343788
MB		 5531 if (o->op_flags & OPf_KIDS) {
5532 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5533 if (kid)
5534 kid = kid->op_sibling; /* get past "big" */
79072805 5535 if (kid && kid->op_type == OP_CONST)
2779dcf1 5536 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5537 }
11343788 5538 return ck_fun(o);
79072805
LW		 5539}
5540
5541OP *
cea2e8a9 5542Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5543{
5544 /* XXX length optimization goes here */
11343788 5545 return ck_fun(o);
79072805
LW		 5546}
5547
5548OP *
cea2e8a9 5549Perl_ck_lfun(pTHX_ OP *o)
79072805 5550{
5dc0d613
MB		 5551 OPCODE type = o->op_type;
5552 return modkids(ck_fun(o), type);
79072805
LW		 5553}
5554
5555OP *
cea2e8a9 5556Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5557{
20ce7b12 5558 dTHR;
d0334bed
GS		 5559 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5560 switch (cUNOPo->op_first->op_type) {
5561 case OP_RV2AV:
7e291ef1 5562 break; /* Globals via GV can be undef */
d0334bed
GS		 5563 case OP_PADAV:
5564 case OP_AASSIGN: /* Is this a good idea? */
5565 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5566 "defined(@array) is deprecated");
d0334bed
GS		 5567 Perl_warner(aTHX_ WARN_DEPRECATED,
5568 "(Maybe you should just omit the defined()?)\n");
69794302 5569 break;
d0334bed 5570 case OP_RV2HV:
7e291ef1 5571 break; /* Globals via GV can be undef */
d0334bed
GS		 5572 case OP_PADHV:
5573 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5574 "defined(%%hash) is deprecated");
d0334bed
GS		 5575 Perl_warner(aTHX_ WARN_DEPRECATED,
5576 "(Maybe you should just omit the defined()?)\n");
5577 break;
5578 default:
5579 /* no warning */
5580 break;
5581 }
69794302
MJD		 5582 }
5583 return ck_rfun(o);
5584}
5585
5586OP *
cea2e8a9 5587Perl_ck_rfun(pTHX_ OP *o)
8990e307 5588{
5dc0d613
MB		 5589 OPCODE type = o->op_type;
5590 return refkids(ck_fun(o), type);
8990e307
LW		 5591}
5592
5593OP *
cea2e8a9 5594Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5595{
5596 register OP *kid;
aeea060c 5597
11343788 5598 kid = cLISTOPo->op_first;
79072805 5599 if (!kid) {
11343788
MB		 5600 o = force_list(o);
5601 kid = cLISTOPo->op_first;
79072805
LW		 5602 }
5603 if (kid->op_type == OP_PUSHMARK)
5604 kid = kid->op_sibling;
11343788 5605 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5606 kid = kid->op_sibling;
5607 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5608 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5609 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5610 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5611 cLISTOPo->op_first->op_sibling = kid;
5612 cLISTOPo->op_last = kid;
79072805
LW		 5613 kid = kid->op_sibling;
5614 }
5615 }
5616
5617 if (!kid)
54b9620d 5618 append_elem(o->op_type, o, newDEFSVOP());
79072805 5619
5dc0d613 5620 o = listkids(o);
bbce6d69 5621
5dc0d613 5622 o->op_private = 0;
36477c24 5623#ifdef USE_LOCALE
3280af22 5624 if (PL_hints & HINT_LOCALE)
5dc0d613 5625 o->op_private |= OPpLOCALE;
bbce6d69 5626#endif
5627
5dc0d613 5628 return o;
bbce6d69 5629}
5630
5631OP *
cea2e8a9 5632Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5633{
5dc0d613 5634 o = ck_fun(o);
bbce6d69 5635
5dc0d613 5636 o->op_private = 0;
36477c24 5637#ifdef USE_LOCALE
3280af22 5638 if (PL_hints & HINT_LOCALE)
5dc0d613 5639 o->op_private |= OPpLOCALE;
bbce6d69 5640#endif
5641
5dc0d613 5642 return o;
bbce6d69 5643}
5644
5645OP *
b162f9ea
IZ		 5646Perl_ck_sassign(pTHX_ OP *o)
5647{
5648 OP *kid = cLISTOPo->op_first;
5649 /* has a disposable target? */
5650 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5651 && !(kid->op_flags & OPf_STACKED))
5652 {
5653 OP *kkid = kid->op_sibling;
5654
5655 /* Can just relocate the target. */
2c2d71f5
JH		 5656 if (kkid && kkid->op_type == OP_PADSV
5657 && !(kkid->op_private & OPpLVAL_INTRO))
5658 {
b162f9ea 5659 kid->op_targ = kkid->op_targ;
743e66e6 5660 kkid->op_targ = 0;
b162f9ea
IZ		 5661 /* Now we do not need PADSV and SASSIGN. */
5662 kid->op_sibling = o->op_sibling; /* NULL */
5663 cLISTOPo->op_first = NULL;
5664 op_free(o);
5665 op_free(kkid);
5666 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5667 return kid;
5668 }
5669 }
5670 return o;
5671}
5672
5673OP *
cea2e8a9 5674Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5675{
5dc0d613 5676 o->op_private = 0;
36477c24 5677#ifdef USE_LOCALE
3280af22 5678 if (PL_hints & HINT_LOCALE)
5dc0d613 5679 o->op_private |= OPpLOCALE;
bbce6d69 5680#endif
36477c24 5681
5dc0d613 5682 return o;
79072805
LW		 5683}
5684
5685OP *
cea2e8a9 5686Perl_ck_match(pTHX_ OP *o)
79072805 5687{
5dc0d613 5688 o->op_private |= OPpRUNTIME;
11343788 5689 return o;
79072805
LW		 5690}
5691
5692OP *
f5d5a27c
CS		 5693Perl_ck_method(pTHX_ OP *o)
5694{
5695 OP *kid = cUNOPo->op_first;
5696 if (kid->op_type == OP_CONST) {
5697 SV* sv = kSVOP->op_sv;
5698 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5699 OP *cmop;
5700 sv_upgrade(sv, SVt_PVIV);
5701 SvIOK_on(sv);
5702 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5703 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5704 kSVOP->op_sv = Nullsv;
5705 op_free(o);
5706 return cmop;
5707 }
5708 }
5709 return o;
5710}
5711
5712OP *
cea2e8a9 5713Perl_ck_null(pTHX_ OP *o)
79072805 5714{
11343788 5715 return o;
79072805
LW		 5716}
5717
5718OP *
cea2e8a9 5719Perl_ck_repeat(pTHX_ OP *o)
79072805 5720{
11343788
MB		 5721 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5722 o->op_private |= OPpREPEAT_DOLIST;
5723 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5724 }
5725 else
11343788
MB		 5726 scalar(o);
5727 return o;
79072805
LW		 5728}
5729
5730OP *
cea2e8a9 5731Perl_ck_require(pTHX_ OP *o)
8990e307 5732{
11343788
MB		 5733 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5734 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5735
5736 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5737 char *s;
a0d0e21e
LW		 5738 for (s = SvPVX(kid->op_sv); *s; s++) {
5739 if (*s == ':' && s[1] == ':') {
5740 *s = '/';
1aef975c 5741 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5742 --SvCUR(kid->op_sv);
5743 }
8990e307 5744 }
a0d0e21e 5745 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5746 }
5747 }
11343788 5748 return ck_fun(o);
8990e307
LW		 5749}
5750
22c35a8c 5751#if 0
8990e307 5752OP *
cea2e8a9 5753Perl_ck_retarget(pTHX_ OP *o)
79072805 5754{
cea2e8a9 5755 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5756 /* STUB */
11343788 5757 return o;
79072805 5758}
22c35a8c 5759#endif
79072805
LW		 5760
5761OP *
cea2e8a9 5762Perl_ck_select(pTHX_ OP *o)
79072805 5763{
c07a80fd 5764 OP* kid;
11343788
MB		 5765 if (o->op_flags & OPf_KIDS) {
5766 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5767 if (kid && kid->op_sibling) {
11343788 5768 o->op_type = OP_SSELECT;
22c35a8c 5769 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5770 o = ck_fun(o);
5771 return fold_constants(o);
79072805
LW		 5772 }
5773 }
11343788
MB		 5774 o = ck_fun(o);
5775 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5776 if (kid && kid->op_type == OP_RV2GV)
5777 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5778 return o;
79072805
LW		 5779}
5780
5781OP *
cea2e8a9 5782Perl_ck_shift(pTHX_ OP *o)
79072805 5783{
11343788 5784 I32 type = o->op_type;
79072805 5785
11343788 5786 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5787 OP *argop;
5788
11343788 5789 op_free(o);
6d4ff0d2 5790#ifdef USE_THREADS
533c011a 5791 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5792 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5793 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5794 }
5795 else {
5796 argop = newUNOP(OP_RV2AV, 0,
5797 scalar(newGVOP(OP_GV, 0,
5798 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5799 }
5800#else
5801 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5802 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5803 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5804#endif /* USE_THREADS */
5805 return newUNOP(type, 0, scalar(argop));
79072805 5806 }
11343788 5807 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5808}
5809
5810OP *
cea2e8a9 5811Perl_ck_sort(pTHX_ OP *o)
79072805 5812{
5dc0d613 5813 o->op_private = 0;
36477c24 5814#ifdef USE_LOCALE
3280af22 5815 if (PL_hints & HINT_LOCALE)
5dc0d613 5816 o->op_private |= OPpLOCALE;
bbce6d69 5817#endif
5818
9ea6e965 5819 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5820 simplify_sort(o);
9c007264 5821 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5822 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5823 OP *k;
82092f1d 5824 kid = kUNOP->op_first; /* get past null */
79072805 5825
463ee0b2 5826 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5827 linklist(kid);
463ee0b2
LW		 5828 if (kid->op_type == OP_SCOPE) {
5829 k = kid->op_next;
5830 kid->op_next = 0;
79072805 5831 }
463ee0b2 5832 else if (kid->op_type == OP_LEAVE) {
11343788 5833 if (o->op_type == OP_SORT) {
748a9306
LW		 5834 null(kid); /* wipe out leave */
5835 kid->op_next = kid;
463ee0b2 5836
748a9306
LW		 5837 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5838 if (k->op_next == kid)
5839 k->op_next = 0;
5840 }
463ee0b2 5841 }
748a9306
LW		 5842 else
5843 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5844 k = kLISTOP->op_first;
463ee0b2 5845 }
a0d0e21e
LW		 5846 peep(k);
5847
11343788 5848 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5849 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5850 kid->op_next = kid;
5851 else
5852 kid->op_next = k;
11343788 5853 o->op_flags |= OPf_SPECIAL;
79072805 5854 }
c6e96bcb
GS		 5855 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5856 null(cLISTOPo->op_first->op_sibling);
79072805 5857 }
bbce6d69 5858
11343788 5859 return o;
79072805 5860}
bda4119b
GS		 5861
5862STATIC void
cea2e8a9 5863S_simplify_sort(pTHX_ OP *o)
9c007264 5864{
51a19bc0 5865 dTHR;
9c007264
JH		 5866 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5867 OP *k;
5868 int reversed;
350de78d 5869 GV *gv;
9c007264
JH		 5870 if (!(o->op_flags & OPf_STACKED))
5871 return;
9ea6e965
GS		 5872 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5873 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5874 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5875 if (kid->op_type != OP_SCOPE)
5876 return;
5877 kid = kLISTOP->op_last; /* get past scope */
5878 switch(kid->op_type) {
5879 case OP_NCMP:
5880 case OP_I_NCMP:
5881 case OP_SCMP:
5882 break;
5883 default:
5884 return;
5885 }
5886 k = kid; /* remember this node*/
5887 if (kBINOP->op_first->op_type != OP_RV2SV)
5888 return;
5889 kid = kBINOP->op_first; /* get past cmp */
5890 if (kUNOP->op_first->op_type != OP_GV)
5891 return;
5892 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5893 gv = kGVOP_gv;
350de78d 5894 if (GvSTASH(gv) != PL_curstash)
9c007264 5895 return;
350de78d 5896 if (strEQ(GvNAME(gv), "a"))
9c007264 5897 reversed = 0;
350de78d 5898 else if(strEQ(GvNAME(gv), "b"))
9c007264
JH		 5899 reversed = 1;
5900 else
5901 return;
5902 kid = k; /* back to cmp */
5903 if (kBINOP->op_last->op_type != OP_RV2SV)
5904 return;
5905 kid = kBINOP->op_last; /* down to 2nd arg */
5906 if (kUNOP->op_first->op_type != OP_GV)
5907 return;
5908 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5909 gv = kGVOP_gv;
350de78d 5910 if (GvSTASH(gv) != PL_curstash
9c007264 5911 || ( reversed
350de78d
GS		 5912 ? strNE(GvNAME(gv), "a")
5913 : strNE(GvNAME(gv), "b")))
9c007264
JH		 5914 return;
5915 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5916 if (reversed)
5917 o->op_private |= OPpSORT_REVERSE;
5918 if (k->op_type == OP_NCMP)
5919 o->op_private |= OPpSORT_NUMERIC;
5920 if (k->op_type == OP_I_NCMP)
5921 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5922 kid = cLISTOPo->op_first->op_sibling;
5923 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5924 op_free(kid); /* then delete it */
5925 cLISTOPo->op_children--;
9c007264 5926}
79072805
LW		 5927
5928OP *
cea2e8a9 5929Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5930{
5931 register OP *kid;
aeea060c 5932
11343788
MB		 5933 if (o->op_flags & OPf_STACKED)
5934 return no_fh_allowed(o);
79072805 5935
11343788 5936 kid = cLISTOPo->op_first;
8990e307 5937 if (kid->op_type != OP_NULL)
cea2e8a9 5938 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5939 kid = kid->op_sibling;
11343788
MB		 5940 op_free(cLISTOPo->op_first);
5941 cLISTOPo->op_first = kid;
85e6fe83 5942 if (!kid) {
79cb57f6 5943 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5944 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5945 }
79072805
LW		 5946
5947 if (kid->op_type != OP_MATCH) {
5948 OP *sibl = kid->op_sibling;
463ee0b2 5949 kid->op_sibling = 0;
79072805 5950 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5951 if (cLISTOPo->op_first == cLISTOPo->op_last)
5952 cLISTOPo->op_last = kid;
5953 cLISTOPo->op_first = kid;
79072805
LW		 5954 kid->op_sibling = sibl;
5955 }
5956
5957 kid->op_type = OP_PUSHRE;
22c35a8c 5958 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5959 scalar(kid);
5960
5961 if (!kid->op_sibling)
54b9620d 5962 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5963
5964 kid = kid->op_sibling;
5965 scalar(kid);
5966
5967 if (!kid->op_sibling)
11343788 5968 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5969
5970 kid = kid->op_sibling;
5971 scalar(kid);
5972
5973 if (kid->op_sibling)
22c35a8c 5974 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5975
11343788 5976 return o;
79072805
LW		 5977}
5978
5979OP *
eb6e2d6f
GS		 5980Perl_ck_join(pTHX_ OP *o)
5981{
5982 if (ckWARN(WARN_SYNTAX)) {
5983 OP *kid = cLISTOPo->op_first->op_sibling;
5984 if (kid && kid->op_type == OP_MATCH) {
5985 char *pmstr = "STRING";
5986 if (kPMOP->op_pmregexp)
5987 pmstr = kPMOP->op_pmregexp->precomp;
5988 Perl_warner(aTHX_ WARN_SYNTAX,
5989 "/%s/ should probably be written as \"%s\"",
5990 pmstr, pmstr);
5991 }
5992 }
5993 return ck_fun(o);
5994}
5995
5996OP *
cea2e8a9 5997Perl_ck_subr(pTHX_ OP *o)
79072805 5998{
11343788
MB		 5999 dTHR;
6000 OP *prev = ((cUNOPo->op_first->op_sibling)
6001 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6002 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6003 OP *cvop;
6004 char *proto = 0;
6005 CV *cv = 0;
46fc3d4c 6006 GV *namegv = 0;
4633a7c4
LW		 6007 int optional = 0;
6008 I32 arg = 0;
2d8e6c8d 6009 STRLEN n_a;
4633a7c4 6010
d3011074 6011 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6012 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6013 if (cvop->op_type == OP_RV2CV) {
6014 SVOP* tmpop;
11343788 6015 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6016 null(cvop); /* disable rv2cv */
6017 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6018 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6019 GV *gv = cGVOPx_gv(tmpop);
350de78d 6020 cv = GvCVu(gv);
76cd736e
GS		 6021 if (!cv)
6022 tmpop->op_private |= OPpEARLY_CV;
6023 else if (SvPOK(cv)) {
350de78d 6024 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6025 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6026 }
4633a7c4
LW		 6027 }
6028 }
f5d5a27c 6029 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6030 if (o2->op_type == OP_CONST)
6031 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6032 else if (o2->op_type == OP_LIST) {
6033 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6034 if (o && o->op_type == OP_CONST)
6035 o->op_private &= ~OPpCONST_STRICT;
6036 }
7a52d87a 6037 }
3280af22
NIS		 6038 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6039 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6040 o->op_private |= OPpENTERSUB_DB;
6041 while (o2 != cvop) {
4633a7c4
LW		 6042 if (proto) {
6043 switch (*proto) {
6044 case '\0':
5dc0d613 6045 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6046 case ';':
6047 optional = 1;
6048 proto++;
6049 continue;
6050 case '$':
6051 proto++;
6052 arg++;
11343788 6053 scalar(o2);
4633a7c4
LW		 6054 break;
6055 case '%':
6056 case '@':
11343788 6057 list(o2);
4633a7c4
LW		 6058 arg++;
6059 break;
6060 case '&':
6061 proto++;
6062 arg++;
11343788 6063 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6064 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6065 break;
6066 case '*':
2ba6ecf4 6067 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6068 proto++;
6069 arg++;
11343788 6070 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6071 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6072 else if (o2->op_type == OP_CONST)
6073 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6074 else if (o2->op_type == OP_ENTERSUB) {
6075 /* accidental subroutine, revert to bareword */
6076 OP *gvop = ((UNOP*)o2)->op_first;
6077 if (gvop && gvop->op_type == OP_NULL) {
6078 gvop = ((UNOP*)gvop)->op_first;
6079 if (gvop) {
6080 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6081 ;
6082 if (gvop &&
6083 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6084 (gvop = ((UNOP*)gvop)->op_first) &&
6085 gvop->op_type == OP_GV)
6086 {
638eceb6 6087 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6088 OP *sibling = o2->op_sibling;
2692f720 6089 SV *n = newSVpvn("",0);
9675f7ac 6090 op_free(o2);
2692f720
GS		 6091 gv_fullname3(n, gv, "");
6092 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6093 sv_chop(n, SvPVX(n)+6);
6094 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6095 prev->op_sibling = o2;
6096 o2->op_sibling = sibling;
6097 }
6098 }
6099 }
6100 }
2ba6ecf4
GS		 6101 scalar(o2);
6102 break;
4633a7c4
LW		 6103 case '\\':
6104 proto++;
6105 arg++;
6106 switch (*proto++) {
6107 case '*':
11343788 6108 if (o2->op_type != OP_RV2GV)
5dc0d613 6109 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6110 goto wrapref;
6111 case '&':
11343788 6112 if (o2->op_type != OP_RV2CV)
5dc0d613 6113 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6114 goto wrapref;
6115 case '$':
386acf99
GS		 6116 if (o2->op_type != OP_RV2SV
6117 && o2->op_type != OP_PADSV
1c01eb51
GS		 6118 && o2->op_type != OP_HELEM
6119 && o2->op_type != OP_AELEM
386acf99
GS		 6120 && o2->op_type != OP_THREADSV)
6121 {
5dc0d613 6122 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6123 }
4633a7c4
LW		 6124 goto wrapref;
6125 case '@':
11343788 6126 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6127 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6128 goto wrapref;
6129 case '%':
11343788 6130 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6131 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6132 wrapref:
6133 {
11343788 6134 OP* kid = o2;
6fa846a0 6135 OP* sib = kid->op_sibling;
4633a7c4 6136 kid->op_sibling = 0;
6fa846a0
GS		 6137 o2 = newUNOP(OP_REFGEN, 0, kid);
6138 o2->op_sibling = sib;
e858de61 6139 prev->op_sibling = o2;
4633a7c4
LW		 6140 }
6141 break;
6142 default: goto oops;
6143 }
6144 break;
b1cb66bf 6145 case ' ':
6146 proto++;
6147 continue;
4633a7c4
LW		 6148 default:
6149 oops:
cea2e8a9 6150 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6151 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6152 }
6153 }
6154 else
11343788
MB		 6155 list(o2);
6156 mod(o2, OP_ENTERSUB);
6157 prev = o2;
6158 o2 = o2->op_sibling;
4633a7c4 6159 }
fb73857a 6160 if (proto && !optional &&
6161 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6162 return too_few_arguments(o, gv_ename(namegv));
11343788 6163 return o;
79072805
LW		 6164}
6165
6166OP *
cea2e8a9 6167Perl_ck_svconst(pTHX_ OP *o)
8990e307 6168{
11343788
MB		 6169 SvREADONLY_on(cSVOPo->op_sv);
6170 return o;
8990e307
LW		 6171}
6172
6173OP *
cea2e8a9 6174Perl_ck_trunc(pTHX_ OP *o)
79072805 6175{
11343788
MB		 6176 if (o->op_flags & OPf_KIDS) {
6177 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6178
a0d0e21e
LW		 6179 if (kid->op_type == OP_NULL)
6180 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6181 if (kid && kid->op_type == OP_CONST &&
6182 (kid->op_private & OPpCONST_BARE))
6183 {
11343788 6184 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6185 kid->op_private &= ~OPpCONST_STRICT;
6186 }
79072805 6187 }
11343788 6188 return ck_fun(o);
79072805
LW		 6189}
6190
463ee0b2
LW		 6191/* A peephole optimizer. We visit the ops in the order they're to execute. */
6192
79072805 6193void
864dbfa3 6194Perl_peep(pTHX_ register OP *o)
79072805 6195{
11343788 6196 dTHR;
79072805 6197 register OP* oldop = 0;
2d8e6c8d 6198 STRLEN n_a;
cd06dffe 6199 OP *last_composite = Nullop;
2d8e6c8d 6200
a0d0e21e 6201 if (!o || o->op_seq)
79072805 6202 return;
a0d0e21e 6203 ENTER;
462e5cf6 6204 SAVEOP();
7766f137 6205 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6206 for (; o; o = o->op_next) {
6207 if (o->op_seq)
6208 break;
3280af22
NIS		 6209 if (!PL_op_seqmax)
6210 PL_op_seqmax++;
533c011a 6211 PL_op = o;
a0d0e21e 6212 switch (o->op_type) {
acb36ea4 6213 case OP_SETSTATE:
a0d0e21e
LW		 6214 case OP_NEXTSTATE:
6215 case OP_DBSTATE:
3280af22
NIS		 6216 PL_curcop = ((COP*)o); /* for warnings */
6217 o->op_seq = PL_op_seqmax++;
cd06dffe 6218 last_composite = Nullop;
a0d0e21e
LW		 6219 break;
6220
a0d0e21e 6221 case OP_CONST:
7a52d87a
GS		 6222 if (cSVOPo->op_private & OPpCONST_STRICT)
6223 no_bareword_allowed(o);
7766f137
GS		 6224#ifdef USE_ITHREADS
6225 /* Relocate sv to the pad for thread safety.
6226 * Despite being a "constant", the SV is written to,
6227 * for reference counts, sv_upgrade() etc. */
6228 if (cSVOP->op_sv) {
6229 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6230 SvREFCNT_dec(PL_curpad[ix]);
6231 SvPADTMP_on(cSVOPo->op_sv);
6232 PL_curpad[ix] = cSVOPo->op_sv;
6233 cSVOPo->op_sv = Nullsv;
6234 o->op_targ = ix;
6235 }
6236#endif
7a52d87a 6237 /* FALL THROUGH */
a0d0e21e
LW		 6238 case OP_UC:
6239 case OP_UCFIRST:
6240 case OP_LC:
6241 case OP_LCFIRST:
ed7ab888
GS		 6242 case OP_CONCAT:
6243 case OP_JOIN:
a0d0e21e 6244 case OP_QUOTEMETA:
b162f9ea
IZ		 6245 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6246 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6247 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6248 goto ignore_optimization;
cd06dffe 6249 else {
b162f9ea 6250 o->op_targ = o->op_next->op_targ;
743e66e6 6251 o->op_next->op_targ = 0;
2c2d71f5 6252 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6253 }
6254 }
a0d0e21e 6255 null(o->op_next);
b162f9ea
IZ		 6256 }
6257 ignore_optimization:
3280af22 6258 o->op_seq = PL_op_seqmax++;
a0d0e21e 6259 break;
8990e307 6260 case OP_STUB:
54310121 6261 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6262 o->op_seq = PL_op_seqmax++;
54310121 6263 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6264 }
748a9306 6265 goto nothin;
79072805 6266 case OP_NULL:
acb36ea4
GS		 6267 if (o->op_targ == OP_NEXTSTATE
6268 || o->op_targ == OP_DBSTATE
6269 || o->op_targ == OP_SETSTATE)
6270 {
3280af22 6271 PL_curcop = ((COP*)o);
acb36ea4 6272 }
748a9306 6273 goto nothin;
79072805 6274 case OP_SCALAR:
93a17b20 6275 case OP_LINESEQ:
463ee0b2 6276 case OP_SCOPE:
748a9306 6277 nothin:
a0d0e21e
LW		 6278 if (oldop && o->op_next) {
6279 oldop->op_next = o->op_next;
79072805
LW		 6280 continue;
6281 }
3280af22 6282 o->op_seq = PL_op_seqmax++;
79072805
LW		 6283 break;
6284
6285 case OP_GV:
a0d0e21e 6286 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 6287 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 6288 null(o->op_next);
6289 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
6290 o->op_next = o->op_next->op_next;
6291 o->op_type = OP_GVSV;
22c35a8c 6292 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6293 }
6294 }
a0d0e21e
LW		 6295 else if (o->op_next->op_type == OP_RV2AV) {
6296 OP* pop = o->op_next->op_next;
6297 IV i;
8990e307 6298 if (pop->op_type == OP_CONST &&
533c011a 6299 (PL_op = pop->op_next) &&
8990e307 6300 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6301 !(pop->op_next->op_private &
68dc0745 6302 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6303 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6304 <= 255 &&
8990e307
LW		 6305 i >= 0)
6306 {
350de78d 6307 GV *gv;
a0d0e21e 6308 null(o->op_next);
8990e307
LW		 6309 null(pop->op_next);
6310 null(pop);
a0d0e21e
LW		 6311 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6312 o->op_next = pop->op_next->op_next;
6313 o->op_type = OP_AELEMFAST;
22c35a8c 6314 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6315 o->op_private = (U8)i;
638eceb6 6316 gv = cGVOPo_gv;
350de78d 6317 GvAVn(gv);
8990e307 6318 }
79072805 6319 }
76cd736e 6320 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
638eceb6 6321 GV *gv = cGVOPo_gv;
76cd736e
GS		 6322 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6323 /* XXX could check prototype here instead of just carping */
6324 SV *sv = sv_newmortal();
6325 gv_efullname3(sv, gv, Nullch);
6326 Perl_warner(aTHX_ WARN_UNSAFE,
6327 "%s() called too early to check prototype",
6328 SvPV_nolen(sv));
6329 }
6330 }
6331
3280af22 6332 o->op_seq = PL_op_seqmax++;
79072805
LW		 6333 break;
6334
a0d0e21e 6335 case OP_MAPWHILE:
79072805
LW		 6336 case OP_GREPWHILE:
6337 case OP_AND:
6338 case OP_OR:
2c2d71f5
JH		 6339 case OP_ANDASSIGN:
6340 case OP_ORASSIGN:
1a67a97c
SM		 6341 case OP_COND_EXPR:
6342 case OP_RANGE:
3280af22 6343 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6344 while (cLOGOP->op_other->op_type == OP_NULL)
6345 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6346 peep(cLOGOP->op_other);
6347 break;
6348
79072805 6349 case OP_ENTERLOOP:
3280af22 6350 o->op_seq = PL_op_seqmax++;
79072805
LW		 6351 peep(cLOOP->op_redoop);
6352 peep(cLOOP->op_nextop);
6353 peep(cLOOP->op_lastop);
6354 break;
6355
8782bef2 6356 case OP_QR:
79072805
LW		 6357 case OP_MATCH:
6358 case OP_SUBST:
3280af22 6359 o->op_seq = PL_op_seqmax++;
a0d0e21e 6360 peep(cPMOP->op_pmreplstart);
79072805
LW		 6361 break;
6362
a0d0e21e 6363 case OP_EXEC:
3280af22 6364 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6365 if (ckWARN(WARN_SYNTAX) && o->op_next
6366 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6367 if (o->op_next->op_sibling &&
20408e3c
GS		 6368 o->op_next->op_sibling->op_type != OP_EXIT &&
6369 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6370 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6371 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6372
57843af0 6373 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
cea2e8a9
GS		 6374 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
6375 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
57843af0 6376 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6377 }
6378 }
6379 break;
aeea060c 6380
c750a3ec
MB		 6381 case OP_HELEM: {
6382 UNOP *rop;
6383 SV *lexname;
6384 GV **fields;
6385 SV **svp, **indsvp;
6386 I32 ind;
6387 char *key;
6388 STRLEN keylen;
aeea060c 6389
377b21bb 6390 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6391 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6392 break;
6393 rop = (UNOP*)((BINOP*)o)->op_first;
6394 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6395 break;
3280af22 6396 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6397 if (!SvOBJECT(lexname))
6398 break;
5196be3e 6399 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6400 if (!fields || !GvHV(*fields))
6401 break;
638eceb6 6402 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6403 key = SvPV(*svp, keylen);
6404 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6405 if (!indsvp) {
88e9b055 6406 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6407 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6408 }
6409 ind = SvIV(*indsvp);
6410 if (ind < 1)
cea2e8a9 6411 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6412 rop->op_type = OP_RV2AV;
22c35a8c 6413 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6414 o->op_type = OP_AELEM;
22c35a8c 6415 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6416 SvREFCNT_dec(*svp);
6417 *svp = newSViv(ind);
6418 break;
6419 }
6420
cd06dffe
GS		 6421 case OP_RV2AV:
6422 case OP_RV2HV:
6423 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6424 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6425 {
cd06dffe 6426 last_composite = o;
e1f15930 6427 }
cd06dffe
GS		 6428 o->op_seq = PL_op_seqmax++;
6429 break;
6430
6431 case OP_RETURN:
970c4905 6432 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6433 o->op_seq = PL_op_seqmax++;
6434 break;
6435 }
6436 /* FALL THROUGH */
6437
6438 case OP_LEAVESUBLV:
6439 if (last_composite) {
6440 OP *r = last_composite;
6441
6442 while (r->op_sibling)
6443 r = r->op_sibling;
6444 if (r->op_next == o
6445 || (r->op_next->op_type == OP_LIST
6446 && r->op_next->op_next == o))
6447 {
6448 if (last_composite->op_type == OP_RV2AV)
6449 yyerror("Lvalue subs returning arrays not implemented yet");
6450 else
6451 yyerror("Lvalue subs returning hashes not implemented yet");
6452 ;
6453 }
6454 }
6455 /* FALL THROUGH */
6456
79072805 6457 default:
3280af22 6458 o->op_seq = PL_op_seqmax++;
79072805
LW		 6459 break;
6460 }
a0d0e21e 6461 oldop = o;
79072805 6462 }
a0d0e21e 6463 LEAVE;
79072805 6464}
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