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Windows build tweaks due to change#4623
[perl5.git] / op.c
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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 */
26#define OP_REFCNT_LOCK NOOP
27#define OP_REFCNT_UNLOCK NOOP
28#define OpREFCNT_set(o,n) NOOP
971a9dd3 29#define OpREFCNT_dec(o) ((o)->op_targ--)
7934575e 30
b7dc083c
NIS		 31#ifdef PL_OP_SLAB_ALLOC
32#define SLAB_SIZE 8192
33static char *PL_OpPtr = NULL;
34static int PL_OpSpace = 0;
35#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
36 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
37 else \
38 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
39 } while (0)
40
864dbfa3 41STATIC void *
cea2e8a9 42S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 43{
44 Newz(m,PL_OpPtr,SLAB_SIZE,char);
45 PL_OpSpace = SLAB_SIZE - sz;
46 return PL_OpPtr += PL_OpSpace;
47}
76e3520e 48
b7dc083c
NIS		 49#else
50#define NewOp(m, var, c, type) Newz(m, var, c, type)
51#endif
e50aee73 52/*
5dc0d613 53 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 54 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 55 */
11343788 56#define CHECKOP(type,o) \
3280af22 57 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 58 ? ( op_free((OP*)o), \
cea2e8a9 59 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 60 Nullop ) \
fc0dc3b3 61 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 62
c53d7c7d
HS		 63#define PAD_MAX 999999999
64
76e3520e 65STATIC char*
cea2e8a9 66S_gv_ename(pTHX_ GV *gv)
4633a7c4 67{
2d8e6c8d 68 STRLEN n_a;
4633a7c4 69 SV* tmpsv = sv_newmortal();
46fc3d4c 70 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 71 return SvPV(tmpsv,n_a);
4633a7c4
LW		 72}
73
76e3520e 74STATIC OP *
cea2e8a9 75S_no_fh_allowed(pTHX_ OP *o)
79072805 76{
cea2e8a9 77 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 78 PL_op_desc[o->op_type]));
11343788 79 return o;
79072805
LW		 80}
81
76e3520e 82STATIC OP *
cea2e8a9 83S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 84{
cea2e8a9 85 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 86 return o;
79072805
LW		 87}
88
76e3520e 89STATIC OP *
cea2e8a9 90S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 91{
cea2e8a9 92 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 93 return o;
79072805
LW		 94}
95
76e3520e 96STATIC void
cea2e8a9 97S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 98{
cea2e8a9 99 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 100 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 101}
102
7a52d87a 103STATIC void
cea2e8a9 104S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 105{
5a844595
GS		 106 qerror(Perl_mess(aTHX_
107 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 108 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 109}
110
79072805
LW		 111/* "register" allocation */
112
113PADOFFSET
864dbfa3 114Perl_pad_allocmy(pTHX_ char *name)
93a17b20 115{
11343788 116 dTHR;
a0d0e21e
LW		 117 PADOFFSET off;
118 SV *sv;
119
834a4ddd 120 if (!(
77ca0c92 121 PL_in_my == KEY_our ||
834a4ddd
LW		 122 isALPHA(name[1]) ||
123 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
77ca0c92 124 name[1] == '_' && (int)strlen(name) > 2 ))
834a4ddd 125 {
c4d0567e 126 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 127 /* 1999-02-27 mjd@plover.com */
128 char *p;
129 p = strchr(name, '\0');
130 /* The next block assumes the buffer is at least 205 chars
131 long. At present, it's always at least 256 chars. */
132 if (p-name > 200) {
133 strcpy(name+200, "...");
134 p = name+199;
135 }
136 else {
137 p[1] = '\0';
138 }
139 /* Move everything else down one character */
140 for (; p-name > 2; p--)
141 *p = *(p-1);
46fc3d4c 142 name[2] = toCTRL(name[1]);
143 name[1] = '^';
144 }
cea2e8a9 145 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 146 }
599cee73 147 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 148 SV **svp = AvARRAY(PL_comppad_name);
149 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 150 if ((sv = svp[off])
3280af22 151 && sv != &PL_sv_undef
c53d7c7d 152 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 153 && strEQ(name, SvPVX(sv)))
154 {
cea2e8a9 155 Perl_warner(aTHX_ WARN_UNSAFE,
77ca0c92
LW		 156 "\"%s\" variable %s masks earlier declaration in same %s",
157 (PL_in_my == KEY_our ? "our" : "my"),
158 name,
159 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 160 break;
161 }
162 }
163 }
a0d0e21e
LW		 164 off = pad_alloc(OP_PADSV, SVs_PADMY);
165 sv = NEWSV(1102,0);
93a17b20
LW		 166 sv_upgrade(sv, SVt_PVNV);
167 sv_setpv(sv, name);
3280af22 168 if (PL_in_my_stash) {
c750a3ec 169 if (*name != '$')
cea2e8a9 170 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 171 name));
c750a3ec
MB		 172 SvOBJECT_on(sv);
173 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 174 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
175 PL_sv_objcount++;
c750a3ec 176 }
77ca0c92
LW		 177 if (PL_in_my == KEY_our)
178 SvFLAGS(sv) |= SVpad_OUR;
3280af22 179 av_store(PL_comppad_name, off, sv);
65202027 180 SvNVX(sv) = (NV)PAD_MAX;
8990e307 181 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 182 if (!PL_min_intro_pending)
183 PL_min_intro_pending = off;
184 PL_max_intro_pending = off;
93a17b20 185 if (*name == '@')
3280af22 186 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 187 else if (*name == '%')
3280af22
NIS		 188 av_store(PL_comppad, off, (SV*)newHV());
189 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 190 return off;
191}
192
2680586e
GS		 193#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
194
76e3520e 195STATIC PADOFFSET
cea2e8a9 196S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 197 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 198{
11343788 199 dTHR;
748a9306 200 CV *cv;
93a17b20
LW		 201 I32 off;
202 SV *sv;
93a17b20 203 register I32 i;
c09156bb 204 register PERL_CONTEXT *cx;
93a17b20 205
748a9306 206 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 207 AV *curlist = CvPADLIST(cv);
208 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 209 AV *curname;
4fdae800 210
3280af22 211 if (!svp || *svp == &PL_sv_undef)
4633a7c4 212 continue;
748a9306
LW		 213 curname = (AV*)*svp;
214 svp = AvARRAY(curname);
93965878 215 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 216 if ((sv = svp[off]) &&
3280af22 217 sv != &PL_sv_undef &&
748a9306 218 seq <= SvIVX(sv) &&
13826f2c 219 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 220 strEQ(SvPVX(sv), name))
221 {
5f05dabc 222 I32 depth;
223 AV *oldpad;
224 SV *oldsv;
225
226 depth = CvDEPTH(cv);
227 if (!depth) {
9607fc9c 228 if (newoff) {
229 if (SvFAKE(sv))
230 continue;
4fdae800 231 return 0; /* don't clone from inactive stack frame */
9607fc9c 232 }
5f05dabc 233 depth = 1;
234 }
235 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
236 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 237 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 238 SV *namesv = NEWSV(1103,0);
748a9306 239 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 240 sv_upgrade(namesv, SVt_PVNV);
241 sv_setpv(namesv, name);
3280af22 242 av_store(PL_comppad_name, newoff, namesv);
65202027 243 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
c53d7c7d 244 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 245 SvFAKE_on(namesv); /* A ref, not a real var */
77ca0c92
LW		 246 if (SvFLAGS(sv) & SVpad_OUR)/* An "our" variable */
247 SvFLAGS(namesv) |= SVpad_OUR;
87671ffc 248 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 249 SvOBJECT_on(namesv);
250 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 251 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 252 PL_sv_objcount++;
253 }
3280af22 254 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 255 /* "It's closures all the way down." */
3280af22 256 CvCLONE_on(PL_compcv);
54310121 257 if (cv == startcv) {
3280af22 258 if (CvANON(PL_compcv))
54310121 259 oldsv = Nullsv; /* no need to keep ref */
260 }
261 else {
28757baa 262 CV *bcv;
263 for (bcv = startcv;
264 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 265 bcv = CvOUTSIDE(bcv))
266 {
28757baa 267 if (CvANON(bcv))
268 CvCLONE_on(bcv);
269 else {
6b35e009
GS		 270 if (ckWARN(WARN_CLOSURE)
271 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
272 {
cea2e8a9 273 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 274 "Variable \"%s\" may be unavailable",
28757baa 275 name);
6b35e009 276 }
28757baa 277 break;
278 }
279 }
280 }
281 }
3280af22 282 else if (!CvUNIQUE(PL_compcv)) {
599cee73 283 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 284 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 285 "Variable \"%s\" will not stay shared", name);
5f05dabc 286 }
748a9306 287 }
3280af22 288 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 289 return newoff;
290 }
93a17b20
LW		 291 }
292 }
293
2680586e
GS		 294 if (flags & FINDLEX_NOSEARCH)
295 return 0;
296
93a17b20
LW		 297 /* Nothing in current lexical context--try eval's context, if any.
298 * This is necessary to let the perldb get at lexically scoped variables.
299 * XXX This will also probably interact badly with eval tree caching.
300 */
301
748a9306 302 for (i = cx_ix; i >= 0; i--) {
93a17b20 303 cx = &cxstack[i];
6b35e009 304 switch (CxTYPE(cx)) {
93a17b20 305 default:
748a9306
LW		 306 if (i == 0 && saweval) {
307 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 308 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 309 }
93a17b20
LW		 310 break;
311 case CXt_EVAL:
44a8e56a 312 switch (cx->blk_eval.old_op_type) {
313 case OP_ENTEREVAL:
6b35e009
GS		 314 if (CxREALEVAL(cx))
315 saweval = i;
44a8e56a 316 break;
317 case OP_REQUIRE:
318 /* require must have its own scope */
319 return 0;
320 }
93a17b20 321 break;
7766f137 322 case CXt_FORMAT:
93a17b20
LW		 323 case CXt_SUB:
324 if (!saweval)
325 return 0;
326 cv = cx->blk_sub.cv;
3280af22 327 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 328 saweval = i; /* so we know where we were called from */
93a17b20 329 continue;
93a17b20 330 }
748a9306 331 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 332 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 333 }
334 }
335
748a9306
LW		 336 return 0;
337}
a0d0e21e 338
748a9306 339PADOFFSET
864dbfa3 340Perl_pad_findmy(pTHX_ char *name)
748a9306 341{
11343788 342 dTHR;
748a9306 343 I32 off;
54310121 344 I32 pendoff = 0;
748a9306 345 SV *sv;
3280af22
NIS		 346 SV **svp = AvARRAY(PL_comppad_name);
347 U32 seq = PL_cop_seqmax;
6b35e009 348 PERL_CONTEXT *cx;
33b8ce05 349 CV *outside;
748a9306 350
11343788
MB		 351#ifdef USE_THREADS
352 /*
353 * Special case to get lexical (and hence per-thread) @_.
354 * XXX I need to find out how to tell at parse-time whether use
355 * of @_ should refer to a lexical (from a sub) or defgv (global
356 * scope and maybe weird sub-ish things like formats). See
357 * startsub in perly.y. It's possible that @_ could be lexical
358 * (at least from subs) even in non-threaded perl.
359 */
360 if (strEQ(name, "@_"))
361 return 0; /* success. (NOT_IN_PAD indicates failure) */
362#endif /* USE_THREADS */
363
748a9306 364 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 365 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 366 if ((sv = svp[off]) &&
3280af22 367 sv != &PL_sv_undef &&
54310121 368 (!SvIVX(sv) ||
369 (seq <= SvIVX(sv) &&
370 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 371 strEQ(SvPVX(sv), name))
372 {
77ca0c92 373 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 374 return (PADOFFSET)off;
375 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 376 }
377 }
748a9306 378
33b8ce05
GS		 379 outside = CvOUTSIDE(PL_compcv);
380
381 /* Check if if we're compiling an eval'', and adjust seq to be the
382 * eval's seq number. This depends on eval'' having a non-null
383 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 384 * identified by CvEVAL being true and CvGV being null. */
385 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 386 cx = &cxstack[cxstack_ix];
387 if (CxREALEVAL(cx))
388 seq = cx->blk_oldcop->cop_seq;
389 }
390
748a9306 391 /* See if it's in a nested scope */
2680586e 392 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 393 if (off) {
394 /* If there is a pending local definition, this new alias must die */
395 if (pendoff)
3280af22 396 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 397 return off; /* pad_findlex returns 0 for failure...*/
54310121 398 }
11343788 399 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 400}
401
402void
864dbfa3 403Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 404{
0453d815 405 dTHR;
93a17b20 406 I32 off;
3280af22 407 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 408 SV *sv;
3280af22
NIS		 409 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
410 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 411 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
412 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 413 }
414 }
415 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 416 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 417 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 418 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 419 }
420}
421
422PADOFFSET
864dbfa3 423Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 424{
11343788 425 dTHR;
79072805
LW		 426 SV *sv;
427 I32 retval;
428
3280af22 429 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 430 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 431 if (PL_pad_reset_pending)
a0d0e21e 432 pad_reset();
ed6116ce 433 if (tmptype & SVs_PADMY) {
79072805 434 do {
3280af22 435 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 436 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 437 retval = AvFILLp(PL_comppad);
79072805
LW		 438 }
439 else {
3280af22
NIS		 440 SV **names = AvARRAY(PL_comppad_name);
441 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 442 for (;;) {
443 /*
444 * "foreach" index vars temporarily become aliases to non-"my"
445 * values. Thus we must skip, not just pad values that are
446 * marked as current pad values, but also those with names.
447 */
3280af22
NIS		 448 if (++PL_padix <= names_fill &&
449 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 450 continue;
3280af22 451 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 452 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 453 break;
454 }
3280af22 455 retval = PL_padix;
79072805 456 }
8990e307 457 SvFLAGS(sv) |= tmptype;
3280af22 458 PL_curpad = AvARRAY(PL_comppad);
11343788 459#ifdef USE_THREADS
b900a521
JH		 460 DEBUG_X(PerlIO_printf(Perl_debug_log,
461 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
462 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 463 (long) retval, PL_op_name[optype]));
11343788 464#else
b900a521
JH		 465 DEBUG_X(PerlIO_printf(Perl_debug_log,
466 "Pad 0x%"UVxf" alloc %ld for %s\n",
467 PTR2UV(PL_curpad),
22c35a8c 468 (long) retval, PL_op_name[optype]));
11343788 469#endif /* USE_THREADS */
79072805
LW		 470 return (PADOFFSET)retval;
471}
472
473SV *
864dbfa3 474Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 475{
11343788
MB		 476 dTHR;
477#ifdef USE_THREADS
b900a521 478 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 479 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
480 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 481#else
79072805 482 if (!po)
cea2e8a9 483 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 484 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
485 PTR2UV(PL_curpad), (IV)po));
11343788 486#endif /* USE_THREADS */
3280af22 487 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 488}
489
490void
864dbfa3 491Perl_pad_free(pTHX_ PADOFFSET po)
79072805 492{
11343788 493 dTHR;
3280af22 494 if (!PL_curpad)
a0d0e21e 495 return;
3280af22 496 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 497 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 498 if (!po)
cea2e8a9 499 Perl_croak(aTHX_ "panic: pad_free po");
11343788 500#ifdef USE_THREADS
b900a521 501 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 502 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 503 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 504#else
97835f67
JH		 505 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
506 PTR2UV(PL_curpad), (IV)po));
11343788 507#endif /* USE_THREADS */
3280af22
NIS		 508 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
509 SvPADTMP_off(PL_curpad[po]);
510 if ((I32)po < PL_padix)
511 PL_padix = po - 1;
79072805
LW		 512}
513
514void
864dbfa3 515Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 516{
11343788 517 dTHR;
3280af22 518 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 519 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 520 if (!po)
cea2e8a9 521 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 522#ifdef USE_THREADS
b900a521 523 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 524 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
525 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 526#else
97835f67
JH		 527 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
528 PTR2UV(PL_curpad), (IV)po));
11343788 529#endif /* USE_THREADS */
3280af22
NIS		 530 SvPADTMP_off(PL_curpad[po]);
531 PL_curpad[po] = NEWSV(1107,0);
532 SvPADTMP_on(PL_curpad[po]);
533 if ((I32)po < PL_padix)
534 PL_padix = po - 1;
79072805
LW		 535}
536
d9bb4600
GS		 537/* XXX pad_reset() is currently disabled because it results in serious bugs.
538 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
539 * on the stack by OPs that use them, there are several ways to get an alias
540 * to a shared TARG. Such an alias will change randomly and unpredictably.
541 * We avoid doing this until we can think of a Better Way.
542 * GSAR 97-10-29 */
79072805 543void
864dbfa3 544Perl_pad_reset(pTHX)
79072805 545{
d9bb4600 546#ifdef USE_BROKEN_PAD_RESET
11343788 547 dTHR;
79072805
LW		 548 register I32 po;
549
6b88bc9c 550 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 551 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 552#ifdef USE_THREADS
b900a521
JH		 553 DEBUG_X(PerlIO_printf(Perl_debug_log,
554 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
555 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 556#else
b900a521
JH		 557 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
558 PTR2UV(PL_curpad)));
11343788 559#endif /* USE_THREADS */
6b88bc9c
GS		 560 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
561 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
562 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
563 SvPADTMP_off(PL_curpad[po]);
748a9306 564 }
6b88bc9c 565 PL_padix = PL_padix_floor;
79072805 566 }
d9bb4600 567#endif
3280af22 568 PL_pad_reset_pending = FALSE;
79072805
LW		 569}
570
a863c7d1 571#ifdef USE_THREADS
54b9620d 572/* find_threadsv is not reentrant */
a863c7d1 573PADOFFSET
864dbfa3 574Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 575{
576 dTHR;
577 char *p;
578 PADOFFSET key;
554b3eca 579 SV **svp;
54b9620d 580 /* We currently only handle names of a single character */
533c011a 581 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 582 if (!p)
583 return NOT_IN_PAD;
533c011a 584 key = p - PL_threadsv_names;
2d8e6c8d 585 MUTEX_LOCK(&thr->mutex);
54b9620d 586 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 587 if (svp)
588 MUTEX_UNLOCK(&thr->mutex);
589 else {
554b3eca 590 SV *sv = NEWSV(0, 0);
54b9620d 591 av_store(thr->threadsv, key, sv);
940cb80d 592 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 593 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 594 /*
595 * Some magic variables used to be automagically initialised
596 * in gv_fetchpv. Those which are now per-thread magicals get
597 * initialised here instead.
598 */
599 switch (*name) {
54b9620d
MB		 600 case '_':
601 break;
554b3eca
MB		 602 case ';':
603 sv_setpv(sv, "\034");
54b9620d 604 sv_magic(sv, 0, 0, name, 1);
554b3eca 605 break;
c277df42
IZ		 606 case '&':
607 case '`':
608 case '\'':
533c011a 609 PL_sawampersand = TRUE;
a3f914c5
GS		 610 /* FALL THROUGH */
611 case '1':
612 case '2':
613 case '3':
614 case '4':
615 case '5':
616 case '6':
617 case '7':
618 case '8':
619 case '9':
c277df42 620 SvREADONLY_on(sv);
d8b5173a 621 /* FALL THROUGH */
067391ea
GS		 622
623 /* XXX %! tied to Errno.pm needs to be added here.
624 * See gv_fetchpv(). */
625 /* case '!': */
626
54b9620d
MB		 627 default:
628 sv_magic(sv, 0, 0, name, 1);
554b3eca 629 }
bf49b057 630 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 631 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 632 sv, (*name < 32) ? "^" : "",
633 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 634 }
635 return key;
636}
637#endif /* USE_THREADS */
638
79072805
LW		 639/* Destructor */
640
641void
864dbfa3 642Perl_op_free(pTHX_ OP *o)
79072805 643{
85e6fe83 644 register OP *kid, *nextkid;
acb36ea4 645 OPCODE type;
79072805 646
5dc0d613 647 if (!o || o->op_seq == (U16)-1)
79072805
LW		 648 return;
649
7934575e
GS		 650 if (o->op_private & OPpREFCOUNTED) {
651 switch (o->op_type) {
652 case OP_LEAVESUB:
653 case OP_LEAVESUBLV:
654 case OP_LEAVEEVAL:
655 case OP_LEAVE:
656 case OP_SCOPE:
657 case OP_LEAVEWRITE:
658 OP_REFCNT_LOCK;
659 if (OpREFCNT_dec(o)) {
660 OP_REFCNT_UNLOCK;
661 return;
662 }
971a9dd3 663 o->op_targ = 0; /* XXXXXX */
7934575e
GS		 664 OP_REFCNT_UNLOCK;
665 break;
666 default:
667 break;
668 }
669 }
670
11343788
MB		 671 if (o->op_flags & OPf_KIDS) {
672 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 673 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 674 op_free(kid);
85e6fe83 675 }
79072805 676 }
acb36ea4
GS		 677 type = o->op_type;
678 if (type == OP_NULL)
679 type = o->op_targ;
680
681 /* COP* is not cleared by op_clear() so that we may track line
682 * numbers etc even after null() */
683 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
684 cop_free((COP*)o);
685
686 op_clear(o);
687
688#ifdef PL_OP_SLAB_ALLOC
689 if ((char *) o == PL_OpPtr)
690 {
691 }
692#else
693 Safefree(o);
694#endif
695}
79072805 696
acb36ea4
GS		 697STATIC void
698S_op_clear(pTHX_ OP *o)
699{
11343788 700 switch (o->op_type) {
acb36ea4
GS		 701 case OP_NULL: /* Was holding old type, if any. */
702 case OP_ENTEREVAL: /* Was holding hints. */
703#ifdef USE_THREADS
704 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
705#endif
706 o->op_targ = 0;
a0d0e21e 707 break;
554b3eca 708#ifdef USE_THREADS
8dd3ba40
SM		 709 case OP_ENTERITER:
710 if (!(o->op_flags & OPf_SPECIAL))
711 break;
712 /* FALL THROUGH */
554b3eca 713#endif /* USE_THREADS */
a6006777 714 default:
ac4c12e7 715 if (!(o->op_flags & OPf_REF)
0b94c7bb 716 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 717 break;
718 /* FALL THROUGH */
463ee0b2 719 case OP_GVSV:
79072805 720 case OP_GV:
a6006777 721 case OP_AELEMFAST:
350de78d 722#ifdef USE_ITHREADS
971a9dd3
GS		 723 if (cPADOPo->op_padix > 0) {
724 if (PL_curpad) {
638eceb6 725 GV *gv = cGVOPo_gv;
971a9dd3
GS		 726 pad_swipe(cPADOPo->op_padix);
727 /* No GvIN_PAD_off(gv) here, because other references may still
728 * exist on the pad */
729 SvREFCNT_dec(gv);
730 }
731 cPADOPo->op_padix = 0;
732 }
350de78d 733#else
971a9dd3 734 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 735 cSVOPo->op_sv = Nullsv;
350de78d 736#endif
79072805
LW		 737 break;
738 case OP_CONST:
11343788 739 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 740 cSVOPo->op_sv = Nullsv;
79072805 741 break;
748a9306
LW		 742 case OP_GOTO:
743 case OP_NEXT:
744 case OP_LAST:
745 case OP_REDO:
11343788 746 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 747 break;
748 /* FALL THROUGH */
a0d0e21e 749 case OP_TRANS:
acb36ea4 750 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 751 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 752 cSVOPo->op_sv = Nullsv;
753 }
754 else {
a0ed51b3 755 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 756 cPVOPo->op_pv = Nullch;
757 }
a0d0e21e
LW		 758 break;
759 case OP_SUBST:
11343788 760 op_free(cPMOPo->op_pmreplroot);
971a9dd3 761 goto clear_pmop;
748a9306 762 case OP_PUSHRE:
971a9dd3
GS		 763#ifdef USE_ITHREADS
764 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
765 if (PL_curpad) {
766 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
767 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
768 /* No GvIN_PAD_off(gv) here, because other references may still
769 * exist on the pad */
770 SvREFCNT_dec(gv);
771 }
772 }
773#else
774 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
775#endif
776 /* FALL THROUGH */
a0d0e21e 777 case OP_MATCH:
8782bef2 778 case OP_QR:
971a9dd3
GS		 779clear_pmop:
780 cPMOPo->op_pmreplroot = Nullop;
c277df42 781 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 782 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 783 break;
79072805
LW		 784 }
785
743e66e6 786 if (o->op_targ > 0) {
11343788 787 pad_free(o->op_targ);
743e66e6
GS		 788 o->op_targ = 0;
789 }
79072805
LW		 790}
791
76e3520e 792STATIC void
3eb57f73
HS		 793S_cop_free(pTHX_ COP* cop)
794{
795 Safefree(cop->cop_label);
57843af0
GS		 796#ifdef USE_ITHREADS
797 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 798 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 799#else
11faa288 800 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 801 SvREFCNT_dec(CopFILEGV(cop));
57843af0 802#endif
0453d815 803 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 804 SvREFCNT_dec(cop->cop_warnings);
805}
806
807STATIC void
cea2e8a9 808S_null(pTHX_ OP *o)
8990e307 809{
acb36ea4
GS		 810 if (o->op_type == OP_NULL)
811 return;
812 op_clear(o);
11343788
MB		 813 o->op_targ = o->op_type;
814 o->op_type = OP_NULL;
22c35a8c 815 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 816}
817
79072805
LW		 818/* Contextualizers */
819
463ee0b2 820#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 821
822OP *
864dbfa3 823Perl_linklist(pTHX_ OP *o)
79072805
LW		 824{
825 register OP *kid;
826
11343788
MB		 827 if (o->op_next)
828 return o->op_next;
79072805
LW		 829
830 /* establish postfix order */
11343788
MB		 831 if (cUNOPo->op_first) {
832 o->op_next = LINKLIST(cUNOPo->op_first);
833 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 834 if (kid->op_sibling)
835 kid->op_next = LINKLIST(kid->op_sibling);
836 else
11343788 837 kid->op_next = o;
79072805
LW		 838 }
839 }
840 else
11343788 841 o->op_next = o;
79072805 842
11343788 843 return o->op_next;
79072805
LW		 844}
845
846OP *
864dbfa3 847Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 848{
849 OP *kid;
11343788
MB		 850 if (o && o->op_flags & OPf_KIDS) {
851 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 852 scalar(kid);
853 }
11343788 854 return o;
79072805
LW		 855}
856
76e3520e 857STATIC OP *
cea2e8a9 858S_scalarboolean(pTHX_ OP *o)
8990e307 859{
d008e5eb 860 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 861 dTHR;
d008e5eb 862 if (ckWARN(WARN_SYNTAX)) {
57843af0 863 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 864
d008e5eb 865 if (PL_copline != NOLINE)
57843af0 866 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 867 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 868 CopLINE_set(PL_curcop, oldline);
d008e5eb 869 }
a0d0e21e 870 }
11343788 871 return scalar(o);
8990e307
LW		 872}
873
874OP *
864dbfa3 875Perl_scalar(pTHX_ OP *o)
79072805
LW		 876{
877 OP *kid;
878
a0d0e21e 879 /* assumes no premature commitment */
3280af22 880 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 881 || o->op_type == OP_RETURN)
7e363e51 882 {
11343788 883 return o;
7e363e51 884 }
79072805 885
5dc0d613 886 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 887
11343788 888 switch (o->op_type) {
79072805 889 case OP_REPEAT:
11343788
MB		 890 if (o->op_private & OPpREPEAT_DOLIST)
891 null(((LISTOP*)cBINOPo->op_first)->op_first);
892 scalar(cBINOPo->op_first);
8990e307 893 break;
79072805
LW		 894 case OP_OR:
895 case OP_AND:
896 case OP_COND_EXPR:
11343788 897 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 898 scalar(kid);
79072805 899 break;
a0d0e21e 900 case OP_SPLIT:
11343788 901 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 902 if (!kPMOP->op_pmreplroot)
903 deprecate("implicit split to @_");
904 }
905 /* FALL THROUGH */
79072805 906 case OP_MATCH:
8782bef2 907 case OP_QR:
79072805
LW		 908 case OP_SUBST:
909 case OP_NULL:
8990e307 910 default:
11343788
MB		 911 if (o->op_flags & OPf_KIDS) {
912 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 913 scalar(kid);
914 }
79072805
LW		 915 break;
916 case OP_LEAVE:
917 case OP_LEAVETRY:
5dc0d613 918 kid = cLISTOPo->op_first;
54310121 919 scalar(kid);
920 while (kid = kid->op_sibling) {
921 if (kid->op_sibling)
922 scalarvoid(kid);
923 else
924 scalar(kid);
925 }
3280af22 926 WITH_THR(PL_curcop = &PL_compiling);
54310121 927 break;
748a9306 928 case OP_SCOPE:
79072805 929 case OP_LINESEQ:
8990e307 930 case OP_LIST:
11343788 931 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 932 if (kid->op_sibling)
933 scalarvoid(kid);
934 else
935 scalar(kid);
936 }
3280af22 937 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 938 break;
939 }
11343788 940 return o;
79072805
LW		 941}
942
943OP *
864dbfa3 944Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 945{
946 OP *kid;
8990e307
LW		 947 char* useless = 0;
948 SV* sv;
2ebea0a1
GS		 949 U8 want;
950
acb36ea4
GS		 951 if (o->op_type == OP_NEXTSTATE
952 || o->op_type == OP_SETSTATE
953 || o->op_type == OP_DBSTATE
954 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
955 || o->op_targ == OP_SETSTATE
956 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 957 {
958 dTHR;
959 PL_curcop = (COP*)o; /* for warning below */
960 }
79072805 961
54310121 962 /* assumes no premature commitment */
2ebea0a1
GS		 963 want = o->op_flags & OPf_WANT;
964 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 965 || o->op_type == OP_RETURN)
7e363e51 966 {
11343788 967 return o;
7e363e51 968 }
79072805 969
b162f9ea 970 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 971 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
972 {
b162f9ea 973 return scalar(o); /* As if inside SASSIGN */
7e363e51 974 }
b162f9ea 975
5dc0d613 976 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 977
11343788 978 switch (o->op_type) {
79072805 979 default:
22c35a8c 980 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 981 break;
36477c24 982 /* FALL THROUGH */
983 case OP_REPEAT:
11343788 984 if (o->op_flags & OPf_STACKED)
8990e307 985 break;
5d82c453
GA		 986 goto func_ops;
987 case OP_SUBSTR:
988 if (o->op_private == 4)
989 break;
8990e307
LW		 990 /* FALL THROUGH */
991 case OP_GVSV:
992 case OP_WANTARRAY:
993 case OP_GV:
994 case OP_PADSV:
995 case OP_PADAV:
996 case OP_PADHV:
997 case OP_PADANY:
998 case OP_AV2ARYLEN:
8990e307 999 case OP_REF:
a0d0e21e
LW		 1000 case OP_REFGEN:
1001 case OP_SREFGEN:
8990e307
LW		 1002 case OP_DEFINED:
1003 case OP_HEX:
1004 case OP_OCT:
1005 case OP_LENGTH:
8990e307
LW		 1006 case OP_VEC:
1007 case OP_INDEX:
1008 case OP_RINDEX:
1009 case OP_SPRINTF:
1010 case OP_AELEM:
1011 case OP_AELEMFAST:
1012 case OP_ASLICE:
8990e307
LW		 1013 case OP_HELEM:
1014 case OP_HSLICE:
1015 case OP_UNPACK:
1016 case OP_PACK:
8990e307
LW		 1017 case OP_JOIN:
1018 case OP_LSLICE:
1019 case OP_ANONLIST:
1020 case OP_ANONHASH:
1021 case OP_SORT:
1022 case OP_REVERSE:
1023 case OP_RANGE:
1024 case OP_FLIP:
1025 case OP_FLOP:
1026 case OP_CALLER:
1027 case OP_FILENO:
1028 case OP_EOF:
1029 case OP_TELL:
1030 case OP_GETSOCKNAME:
1031 case OP_GETPEERNAME:
1032 case OP_READLINK:
1033 case OP_TELLDIR:
1034 case OP_GETPPID:
1035 case OP_GETPGRP:
1036 case OP_GETPRIORITY:
1037 case OP_TIME:
1038 case OP_TMS:
1039 case OP_LOCALTIME:
1040 case OP_GMTIME:
1041 case OP_GHBYNAME:
1042 case OP_GHBYADDR:
1043 case OP_GHOSTENT:
1044 case OP_GNBYNAME:
1045 case OP_GNBYADDR:
1046 case OP_GNETENT:
1047 case OP_GPBYNAME:
1048 case OP_GPBYNUMBER:
1049 case OP_GPROTOENT:
1050 case OP_GSBYNAME:
1051 case OP_GSBYPORT:
1052 case OP_GSERVENT:
1053 case OP_GPWNAM:
1054 case OP_GPWUID:
1055 case OP_GGRNAM:
1056 case OP_GGRGID:
1057 case OP_GETLOGIN:
5d82c453 1058 func_ops:
11343788 1059 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 1060 useless = PL_op_desc[o->op_type];
8990e307
LW		 1061 break;
1062
1063 case OP_RV2GV:
1064 case OP_RV2SV:
1065 case OP_RV2AV:
1066 case OP_RV2HV:
11343788
MB		 1067 if (!(o->op_private & OPpLVAL_INTRO) &&
1068 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1069 useless = "a variable";
1070 break;
79072805
LW		 1071
1072 case OP_CONST:
7766f137 1073 sv = cSVOPo_sv;
7a52d87a
GS		 1074 if (cSVOPo->op_private & OPpCONST_STRICT)
1075 no_bareword_allowed(o);
1076 else {
d008e5eb
GS		 1077 dTHR;
1078 if (ckWARN(WARN_VOID)) {
1079 useless = "a constant";
1080 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1081 useless = 0;
1082 else if (SvPOK(sv)) {
1083 if (strnEQ(SvPVX(sv), "di", 2) ||
1084 strnEQ(SvPVX(sv), "ds", 2) ||
1085 strnEQ(SvPVX(sv), "ig", 2))
1086 useless = 0;
1087 }
8990e307
LW		 1088 }
1089 }
acb36ea4 1090 null(o); /* don't execute or even remember it */
79072805
LW		 1091 break;
1092
1093 case OP_POSTINC:
11343788 1094 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1095 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1096 break;
1097
1098 case OP_POSTDEC:
11343788 1099 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1100 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1101 break;
1102
79072805
LW		 1103 case OP_OR:
1104 case OP_AND:
1105 case OP_COND_EXPR:
11343788 1106 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1107 scalarvoid(kid);
1108 break;
5aabfad6 1109
a0d0e21e 1110 case OP_NULL:
11343788 1111 if (o->op_flags & OPf_STACKED)
a0d0e21e 1112 break;
5aabfad6 1113 /* FALL THROUGH */
2ebea0a1
GS		 1114 case OP_NEXTSTATE:
1115 case OP_DBSTATE:
79072805
LW		 1116 case OP_ENTERTRY:
1117 case OP_ENTER:
1118 case OP_SCALAR:
11343788 1119 if (!(o->op_flags & OPf_KIDS))
79072805 1120 break;
54310121 1121 /* FALL THROUGH */
463ee0b2 1122 case OP_SCOPE:
79072805
LW		 1123 case OP_LEAVE:
1124 case OP_LEAVETRY:
a0d0e21e 1125 case OP_LEAVELOOP:
79072805 1126 case OP_LINESEQ:
79072805 1127 case OP_LIST:
11343788 1128 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1129 scalarvoid(kid);
1130 break;
c90c0ff4 1131 case OP_ENTEREVAL:
5196be3e 1132 scalarkids(o);
c90c0ff4 1133 break;
5aabfad6 1134 case OP_REQUIRE:
c90c0ff4 1135 /* all requires must return a boolean value */
5196be3e
MB		 1136 o->op_flags &= ~OPf_WANT;
1137 return scalar(o);
a0d0e21e 1138 case OP_SPLIT:
11343788 1139 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1140 if (!kPMOP->op_pmreplroot)
1141 deprecate("implicit split to @_");
1142 }
1143 break;
79072805 1144 }
d008e5eb
GS		 1145 if (useless) {
1146 dTHR;
1147 if (ckWARN(WARN_VOID))
cea2e8a9 1148 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1149 }
11343788 1150 return o;
79072805
LW		 1151}
1152
1153OP *
864dbfa3 1154Perl_listkids(pTHX_ OP *o)
79072805
LW		 1155{
1156 OP *kid;
11343788
MB		 1157 if (o && o->op_flags & OPf_KIDS) {
1158 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1159 list(kid);
1160 }
11343788 1161 return o;
79072805
LW		 1162}
1163
1164OP *
864dbfa3 1165Perl_list(pTHX_ OP *o)
79072805
LW		 1166{
1167 OP *kid;
1168
a0d0e21e 1169 /* assumes no premature commitment */
3280af22 1170 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1171 || o->op_type == OP_RETURN)
7e363e51 1172 {
11343788 1173 return o;
7e363e51 1174 }
79072805 1175
b162f9ea 1176 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1177 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1178 {
b162f9ea 1179 return o; /* As if inside SASSIGN */
7e363e51 1180 }
b162f9ea 1181
5dc0d613 1182 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1183
11343788 1184 switch (o->op_type) {
79072805
LW		 1185 case OP_FLOP:
1186 case OP_REPEAT:
11343788 1187 list(cBINOPo->op_first);
79072805
LW		 1188 break;
1189 case OP_OR:
1190 case OP_AND:
1191 case OP_COND_EXPR:
11343788 1192 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1193 list(kid);
1194 break;
1195 default:
1196 case OP_MATCH:
8782bef2 1197 case OP_QR:
79072805
LW		 1198 case OP_SUBST:
1199 case OP_NULL:
11343788 1200 if (!(o->op_flags & OPf_KIDS))
79072805 1201 break;
11343788
MB		 1202 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1203 list(cBINOPo->op_first);
1204 return gen_constant_list(o);
79072805
LW		 1205 }
1206 case OP_LIST:
11343788 1207 listkids(o);
79072805
LW		 1208 break;
1209 case OP_LEAVE:
1210 case OP_LEAVETRY:
5dc0d613 1211 kid = cLISTOPo->op_first;
54310121 1212 list(kid);
1213 while (kid = kid->op_sibling) {
1214 if (kid->op_sibling)
1215 scalarvoid(kid);
1216 else
1217 list(kid);
1218 }
3280af22 1219 WITH_THR(PL_curcop = &PL_compiling);
54310121 1220 break;
748a9306 1221 case OP_SCOPE:
79072805 1222 case OP_LINESEQ:
11343788 1223 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1224 if (kid->op_sibling)
1225 scalarvoid(kid);
1226 else
1227 list(kid);
1228 }
3280af22 1229 WITH_THR(PL_curcop = &PL_compiling);
79072805 1230 break;
c90c0ff4 1231 case OP_REQUIRE:
1232 /* all requires must return a boolean value */
5196be3e
MB		 1233 o->op_flags &= ~OPf_WANT;
1234 return scalar(o);
79072805 1235 }
11343788 1236 return o;
79072805
LW		 1237}
1238
1239OP *
864dbfa3 1240Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1241{
1242 OP *kid;
1243
11343788
MB		 1244 if (o) {
1245 if (o->op_type == OP_LINESEQ ||
1246 o->op_type == OP_SCOPE ||
1247 o->op_type == OP_LEAVE ||
1248 o->op_type == OP_LEAVETRY)
463ee0b2 1249 {
0f15f207 1250 dTHR;
11343788 1251 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1252 if (kid->op_sibling) {
463ee0b2 1253 scalarvoid(kid);
ed6116ce 1254 }
463ee0b2 1255 }
3280af22 1256 PL_curcop = &PL_compiling;
79072805 1257 }
11343788 1258 o->op_flags &= ~OPf_PARENS;
3280af22 1259 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1260 o->op_flags |= OPf_PARENS;
79072805 1261 }
8990e307 1262 else
11343788
MB		 1263 o = newOP(OP_STUB, 0);
1264 return o;
79072805
LW		 1265}
1266
76e3520e 1267STATIC OP *
cea2e8a9 1268S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1269{
1270 OP *kid;
11343788
MB		 1271 if (o && o->op_flags & OPf_KIDS) {
1272 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1273 mod(kid, type);
79072805 1274 }
11343788 1275 return o;
79072805
LW		 1276}
1277
79072805 1278OP *
864dbfa3 1279Perl_mod(pTHX_ OP *o, I32 type)
79072805 1280{
11343788 1281 dTHR;
79072805
LW		 1282 OP *kid;
1283 SV *sv;
2d8e6c8d 1284 STRLEN n_a;
79072805 1285
3280af22 1286 if (!o || PL_error_count)
11343788 1287 return o;
79072805 1288
b162f9ea 1289 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1290 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1291 {
b162f9ea 1292 return o;
7e363e51 1293 }
b162f9ea 1294
11343788 1295 switch (o->op_type) {
68dc0745 1296 case OP_UNDEF:
3280af22 1297 PL_modcount++;
5dc0d613 1298 return o;
a0d0e21e 1299 case OP_CONST:
11343788 1300 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1301 goto nomod;
3280af22 1302 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1303 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1304 PL_eval_start = 0;
a0d0e21e
LW		 1305 }
1306 else if (!type) {
3280af22
NIS		 1307 SAVEI32(PL_compiling.cop_arybase);
1308 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1309 }
1310 else if (type == OP_REFGEN)
1311 goto nomod;
1312 else
cea2e8a9 1313 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1314 break;
5f05dabc 1315 case OP_STUB:
5196be3e 1316 if (o->op_flags & OPf_PARENS)
5f05dabc 1317 break;
1318 goto nomod;
a0d0e21e
LW		 1319 case OP_ENTERSUB:
1320 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1321 !(o->op_flags & OPf_STACKED)) {
1322 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1323 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1324 assert(cUNOPo->op_first->op_type == OP_NULL);
1325 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1326 break;
1327 }
cd06dffe
GS		 1328 else { /* lvalue subroutine call */
1329 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1330 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1331 /* Backward compatibility mode: */
1332 o->op_private |= OPpENTERSUB_INARGS;
1333 break;
1334 }
1335 else { /* Compile-time error message: */
1336 OP *kid = cUNOPo->op_first;
1337 CV *cv;
1338 OP *okid;
1339
1340 if (kid->op_type == OP_PUSHMARK)
1341 goto skip_kids;
1342 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1343 Perl_croak(aTHX_
1344 "panic: unexpected lvalue entersub "
1345 "args: type/targ %ld:%ld",
1346 (long)kid->op_type,kid->op_targ);
1347 kid = kLISTOP->op_first;
1348 skip_kids:
1349 while (kid->op_sibling)
1350 kid = kid->op_sibling;
1351 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1352 /* Indirect call */
1353 if (kid->op_type == OP_METHOD_NAMED
1354 || kid->op_type == OP_METHOD)
1355 {
349fd7b7 1356 OP *newop;
cd06dffe
GS		 1357
1358 if (kid->op_sibling || kid->op_next != kid) {
1359 yyerror("panic: unexpected optree near method call");
1360 break;
1361 }
1362
349fd7b7
GS		 1363 NewOp(1101, newop, 1, OP);
1364 newop->op_type = OP_RV2CV;
1365 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
1366 newop->op_next = newop;
1367 kid->op_sibling = newop;
1368 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1369 break;
1370 }
1371
1372 if (kid->op_type != OP_RV2CV)
1373 Perl_croak(aTHX_
1374 "panic: unexpected lvalue entersub "
1375 "entry via type/targ %ld:%ld",
1376 (long)kid->op_type,kid->op_targ);
1377 kid->op_private |= OPpLVAL_INTRO;
1378 break; /* Postpone until runtime */
1379 }
1380
1381 okid = kid;
1382 kid = kUNOP->op_first;
1383 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1384 kid = kUNOP->op_first;
1385 if (kid->op_type == OP_NULL)
1386 Perl_croak(aTHX_
1387 "Unexpected constant lvalue entersub "
1388 "entry via type/targ %ld:%ld",
1389 (long)kid->op_type,kid->op_targ);
1390 if (kid->op_type != OP_GV) {
1391 /* Restore RV2CV to check lvalueness */
1392 restore_2cv:
1393 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1394 okid->op_next = kid->op_next;
1395 kid->op_next = okid;
1396 }
1397 else
1398 okid->op_next = Nullop;
1399 okid->op_type = OP_RV2CV;
1400 okid->op_targ = 0;
1401 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1402 okid->op_private |= OPpLVAL_INTRO;
1403 break;
1404 }
1405
638eceb6 1406 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1407 if (!cv)
1408 goto restore_2cv;
1409 if (CvLVALUE(cv))
1410 break;
1411 }
1412 }
79072805
LW		 1413 /* FALL THROUGH */
1414 default:
a0d0e21e
LW		 1415 nomod:
1416 /* grep, foreach, subcalls, refgen */
1417 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1418 break;
cea2e8a9 1419 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1420 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1421 ? "do block"
1422 : (o->op_type == OP_ENTERSUB
1423 ? "non-lvalue subroutine call"
1424 : PL_op_desc[o->op_type])),
22c35a8c 1425 type ? PL_op_desc[type] : "local"));
11343788 1426 return o;
79072805 1427
a0d0e21e
LW		 1428 case OP_PREINC:
1429 case OP_PREDEC:
1430 case OP_POW:
1431 case OP_MULTIPLY:
1432 case OP_DIVIDE:
1433 case OP_MODULO:
1434 case OP_REPEAT:
1435 case OP_ADD:
1436 case OP_SUBTRACT:
1437 case OP_CONCAT:
1438 case OP_LEFT_SHIFT:
1439 case OP_RIGHT_SHIFT:
1440 case OP_BIT_AND:
1441 case OP_BIT_XOR:
1442 case OP_BIT_OR:
1443 case OP_I_MULTIPLY:
1444 case OP_I_DIVIDE:
1445 case OP_I_MODULO:
1446 case OP_I_ADD:
1447 case OP_I_SUBTRACT:
11343788 1448 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1449 goto nomod;
3280af22 1450 PL_modcount++;
a0d0e21e
LW		 1451 break;
1452
79072805 1453 case OP_COND_EXPR:
11343788 1454 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1455 mod(kid, type);
79072805
LW		 1456 break;
1457
1458 case OP_RV2AV:
1459 case OP_RV2HV:
93af7a87 1460 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1461 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1462 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1463 PL_modcount = 10000;
11343788 1464 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1465 }
1466 /* FALL THROUGH */
79072805 1467 case OP_RV2GV:
5dc0d613 1468 if (scalar_mod_type(o, type))
3fe9a6f1 1469 goto nomod;
11343788 1470 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1471 /* FALL THROUGH */
1472 case OP_AASSIGN:
1473 case OP_ASLICE:
1474 case OP_HSLICE:
93a17b20
LW		 1475 case OP_NEXTSTATE:
1476 case OP_DBSTATE:
a0d0e21e
LW		 1477 case OP_REFGEN:
1478 case OP_CHOMP:
3280af22 1479 PL_modcount = 10000;
79072805 1480 break;
463ee0b2 1481 case OP_RV2SV:
11343788 1482 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1483 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1484 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1485 /* FALL THROUGH */
79072805 1486 case OP_GV:
463ee0b2 1487 case OP_AV2ARYLEN:
3280af22 1488 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1489 case OP_SASSIGN:
bf4b1e52
GS		 1490 case OP_ANDASSIGN:
1491 case OP_ORASSIGN:
8990e307 1492 case OP_AELEMFAST:
3280af22 1493 PL_modcount++;
8990e307
LW		 1494 break;
1495
748a9306
LW		 1496 case OP_PADAV:
1497 case OP_PADHV:
3280af22 1498 PL_modcount = 10000;
5196be3e
MB		 1499 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1500 return o; /* Treat \(@foo) like ordinary list. */
1501 if (scalar_mod_type(o, type))
3fe9a6f1 1502 goto nomod;
748a9306
LW		 1503 /* FALL THROUGH */
1504 case OP_PADSV:
3280af22 1505 PL_modcount++;
748a9306 1506 if (!type)
cea2e8a9 1507 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1508 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1509 break;
1510
554b3eca 1511#ifdef USE_THREADS
2faa37cc 1512 case OP_THREADSV:
533c011a 1513 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1514 break;
1515#endif /* USE_THREADS */
1516
748a9306
LW		 1517 case OP_PUSHMARK:
1518 break;
a0d0e21e 1519
69969c6f
SB		 1520 case OP_KEYS:
1521 if (type != OP_SASSIGN)
1522 goto nomod;
5d82c453
GA		 1523 goto lvalue_func;
1524 case OP_SUBSTR:
1525 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1526 goto nomod;
5f05dabc 1527 /* FALL THROUGH */
a0d0e21e 1528 case OP_POS:
463ee0b2 1529 case OP_VEC:
5d82c453 1530 lvalue_func:
11343788
MB		 1531 pad_free(o->op_targ);
1532 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1533 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1534 if (o->op_flags & OPf_KIDS)
1535 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1536 break;
a0d0e21e 1537
463ee0b2
LW		 1538 case OP_AELEM:
1539 case OP_HELEM:
11343788 1540 ref(cBINOPo->op_first, o->op_type);
68dc0745 1541 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1542 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1543 o->op_private |= OPpLVAL_DEFER;
3280af22 1544 PL_modcount++;
463ee0b2
LW		 1545 break;
1546
1547 case OP_SCOPE:
1548 case OP_LEAVE:
1549 case OP_ENTER:
11343788
MB		 1550 if (o->op_flags & OPf_KIDS)
1551 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1552 break;
1553
1554 case OP_NULL:
638bc118
GS		 1555 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1556 goto nomod;
1557 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1558 break;
11343788
MB		 1559 if (o->op_targ != OP_LIST) {
1560 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1561 break;
1562 }
1563 /* FALL THROUGH */
463ee0b2 1564 case OP_LIST:
11343788 1565 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1566 mod(kid, type);
1567 break;
1568 }
11343788 1569 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1570
1571 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1572 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1573 else if (!type) {
11343788
MB		 1574 o->op_private |= OPpLVAL_INTRO;
1575 o->op_flags &= ~OPf_SPECIAL;
3280af22 1576 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1577 }
a0d0e21e 1578 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1579 o->op_flags |= OPf_REF;
1580 return o;
463ee0b2
LW		 1581}
1582
864dbfa3 1583STATIC bool
cea2e8a9 1584S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1585{
1586 switch (type) {
1587 case OP_SASSIGN:
5196be3e 1588 if (o->op_type == OP_RV2GV)
3fe9a6f1 1589 return FALSE;
1590 /* FALL THROUGH */
1591 case OP_PREINC:
1592 case OP_PREDEC:
1593 case OP_POSTINC:
1594 case OP_POSTDEC:
1595 case OP_I_PREINC:
1596 case OP_I_PREDEC:
1597 case OP_I_POSTINC:
1598 case OP_I_POSTDEC:
1599 case OP_POW:
1600 case OP_MULTIPLY:
1601 case OP_DIVIDE:
1602 case OP_MODULO:
1603 case OP_REPEAT:
1604 case OP_ADD:
1605 case OP_SUBTRACT:
1606 case OP_I_MULTIPLY:
1607 case OP_I_DIVIDE:
1608 case OP_I_MODULO:
1609 case OP_I_ADD:
1610 case OP_I_SUBTRACT:
1611 case OP_LEFT_SHIFT:
1612 case OP_RIGHT_SHIFT:
1613 case OP_BIT_AND:
1614 case OP_BIT_XOR:
1615 case OP_BIT_OR:
1616 case OP_CONCAT:
1617 case OP_SUBST:
1618 case OP_TRANS:
49e9fbe6
GS		 1619 case OP_READ:
1620 case OP_SYSREAD:
1621 case OP_RECV:
bf4b1e52
GS		 1622 case OP_ANDASSIGN:
1623 case OP_ORASSIGN:
3fe9a6f1 1624 return TRUE;
1625 default:
1626 return FALSE;
1627 }
1628}
1629
35cd451c 1630STATIC bool
cea2e8a9 1631S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1632{
1633 switch (o->op_type) {
1634 case OP_PIPE_OP:
1635 case OP_SOCKPAIR:
1636 if (argnum == 2)
1637 return TRUE;
1638 /* FALL THROUGH */
1639 case OP_SYSOPEN:
1640 case OP_OPEN:
ded8aa31 1641 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1642 case OP_SOCKET:
1643 case OP_OPEN_DIR:
1644 case OP_ACCEPT:
1645 if (argnum == 1)
1646 return TRUE;
1647 /* FALL THROUGH */
1648 default:
1649 return FALSE;
1650 }
1651}
1652
463ee0b2 1653OP *
864dbfa3 1654Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1655{
1656 OP *kid;
11343788
MB		 1657 if (o && o->op_flags & OPf_KIDS) {
1658 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1659 ref(kid, type);
1660 }
11343788 1661 return o;
463ee0b2
LW		 1662}
1663
1664OP *
864dbfa3 1665Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1666{
1667 OP *kid;
463ee0b2 1668
3280af22 1669 if (!o || PL_error_count)
11343788 1670 return o;
463ee0b2 1671
11343788 1672 switch (o->op_type) {
a0d0e21e 1673 case OP_ENTERSUB:
e55aaa0e 1674 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1675 !(o->op_flags & OPf_STACKED)) {
1676 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1677 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1678 assert(cUNOPo->op_first->op_type == OP_NULL);
1679 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1680 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1681 }
1682 break;
aeea060c 1683
463ee0b2 1684 case OP_COND_EXPR:
11343788 1685 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1686 ref(kid, type);
1687 break;
8990e307 1688 case OP_RV2SV:
35cd451c
GS		 1689 if (type == OP_DEFINED)
1690 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1691 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1692 /* FALL THROUGH */
1693 case OP_PADSV:
5f05dabc 1694 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1695 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1696 : type == OP_RV2HV ? OPpDEREF_HV
1697 : OPpDEREF_SV);
11343788 1698 o->op_flags |= OPf_MOD;
a0d0e21e 1699 }
8990e307
LW		 1700 break;
1701
2faa37cc 1702 case OP_THREADSV:
a863c7d1
MB		 1703 o->op_flags |= OPf_MOD; /* XXX ??? */
1704 break;
1705
463ee0b2
LW		 1706 case OP_RV2AV:
1707 case OP_RV2HV:
aeea060c 1708 o->op_flags |= OPf_REF;
8990e307 1709 /* FALL THROUGH */
463ee0b2 1710 case OP_RV2GV:
35cd451c
GS		 1711 if (type == OP_DEFINED)
1712 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1713 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1714 break;
8990e307 1715
463ee0b2
LW		 1716 case OP_PADAV:
1717 case OP_PADHV:
aeea060c 1718 o->op_flags |= OPf_REF;
79072805 1719 break;
aeea060c 1720
8990e307 1721 case OP_SCALAR:
79072805 1722 case OP_NULL:
11343788 1723 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1724 break;
11343788 1725 ref(cBINOPo->op_first, type);
79072805
LW		 1726 break;
1727 case OP_AELEM:
1728 case OP_HELEM:
11343788 1729 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1730 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1731 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1732 : type == OP_RV2HV ? OPpDEREF_HV
1733 : OPpDEREF_SV);
11343788 1734 o->op_flags |= OPf_MOD;
8990e307 1735 }
79072805
LW		 1736 break;
1737
463ee0b2 1738 case OP_SCOPE:
79072805
LW		 1739 case OP_LEAVE:
1740 case OP_ENTER:
8990e307 1741 case OP_LIST:
11343788 1742 if (!(o->op_flags & OPf_KIDS))
79072805 1743 break;
11343788 1744 ref(cLISTOPo->op_last, type);
79072805 1745 break;
a0d0e21e
LW		 1746 default:
1747 break;
79072805 1748 }
11343788 1749 return scalar(o);
8990e307 1750
79072805
LW		 1751}
1752
09bef843
SB		 1753STATIC OP *
1754S_dup_attrlist(pTHX_ OP *o)
1755{
1756 OP *rop = Nullop;
1757
1758 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1759 * where the first kid is OP_PUSHMARK and the remaining ones
1760 * are OP_CONST. We need to push the OP_CONST values.
1761 */
1762 if (o->op_type == OP_CONST)
1763 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1764 else {
1765 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1766 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1767 if (o->op_type == OP_CONST)
1768 rop = append_elem(OP_LIST, rop,
1769 newSVOP(OP_CONST, o->op_flags,
1770 SvREFCNT_inc(cSVOPo->op_sv)));
1771 }
1772 }
1773 return rop;
1774}
1775
1776STATIC void
1777S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1778{
1779 OP *modname; /* for 'use' */
1780 SV *stashsv;
1781
1782 /* fake up C<use attributes $pkg,$rv,@attrs> */
1783 ENTER; /* need to protect against side-effects of 'use' */
1784 SAVEINT(PL_expect);
1785 if (stash && HvNAME(stash))
1786 stashsv = newSVpv(HvNAME(stash), 0);
1787 else
1788 stashsv = &PL_sv_no;
1789#define ATTRSMODULE "attributes"
1790 modname = newSVOP(OP_CONST, 0,
1791 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1792 modname->op_private |= OPpCONST_BARE;
1793 /* that flag is required to make 'use' work right */
1794 utilize(1, start_subparse(FALSE, 0),
1795 Nullop, /* version */
1796 modname,
1797 prepend_elem(OP_LIST,
1798 newSVOP(OP_CONST, 0, stashsv),
1799 prepend_elem(OP_LIST,
1800 newSVOP(OP_CONST, 0, newRV(target)),
1801 dup_attrlist(attrs))));
1802 LEAVE;
1803}
1804
1805STATIC OP *
1806S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1807{
1808 OP *kid;
93a17b20
LW		 1809 I32 type;
1810
3280af22 1811 if (!o || PL_error_count)
11343788 1812 return o;
93a17b20 1813
11343788 1814 type = o->op_type;
93a17b20 1815 if (type == OP_LIST) {
11343788 1816 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1817 my_kid(kid, attrs);
dab48698 1818 } else if (type == OP_UNDEF) {
7766148a 1819 return o;
77ca0c92
LW		 1820 } else if (type == OP_RV2SV || /* "our" declaration */
1821 type == OP_RV2AV ||
1822 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
1823 return o;
dab48698 1824 } else if (type != OP_PADSV &&
93a17b20
LW		 1825 type != OP_PADAV &&
1826 type != OP_PADHV &&
1827 type != OP_PUSHMARK)
1828 {
cea2e8a9 1829 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1830 return o;
93a17b20 1831 }
09bef843
SB		 1832 else if (attrs && type != OP_PUSHMARK) {
1833 HV *stash;
1834 SV *padsv;
1835 SV **namesvp;
1836
1837 /* check for C<my Dog $spot> when deciding package */
1838 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1839 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1840 stash = SvSTASH(*namesvp);
1841 else
1842 stash = PL_curstash;
1843 padsv = PAD_SV(o->op_targ);
1844 apply_attrs(stash, padsv, attrs);
1845 }
11343788
MB		 1846 o->op_flags |= OPf_MOD;
1847 o->op_private |= OPpLVAL_INTRO;
1848 return o;
93a17b20
LW		 1849}
1850
1851OP *
09bef843
SB		 1852Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1853{
1854 if (o->op_flags & OPf_PARENS)
1855 list(o);
1856 PL_in_my = FALSE;
1857 PL_in_my_stash = Nullhv;
1858 if (attrs)
1859 SAVEFREEOP(attrs);
1860 return my_kid(o, attrs);
1861}
1862
1863OP *
1864Perl_my(pTHX_ OP *o)
1865{
1866 return my_kid(o, Nullop);
1867}
1868
1869OP *
864dbfa3 1870Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1871{
1872 if (o)
1873 o->op_flags |= OPf_PARENS;
1874 return o;
1875}
1876
1877OP *
864dbfa3 1878Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1879{
d008e5eb 1880 dTHR;
11343788 1881 OP *o;
79072805 1882
599cee73
PM		 1883 if (ckWARN(WARN_UNSAFE) &&
1884 (left->op_type == OP_RV2AV ||
1885 left->op_type == OP_RV2HV ||
1886 left->op_type == OP_PADAV ||
1887 left->op_type == OP_PADHV)) {
22c35a8c 1888 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1889 right->op_type == OP_TRANS)
1890 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1891 const char *sample = ((left->op_type == OP_RV2AV ||
1892 left->op_type == OP_PADAV)
1893 ? "@array" : "%hash");
cea2e8a9 1894 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1895 "Applying %s to %s will act on scalar(%s)",
1896 desc, sample, sample);
2ae324a7 1897 }
1898
79072805
LW		 1899 if (right->op_type == OP_MATCH ||
1900 right->op_type == OP_SUBST ||
1901 right->op_type == OP_TRANS) {
1902 right->op_flags |= OPf_STACKED;
1903 if (right->op_type != OP_MATCH)
463ee0b2 1904 left = mod(left, right->op_type);
79072805 1905 if (right->op_type == OP_TRANS)
11343788 1906 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1907 else
11343788 1908 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1909 if (type == OP_NOT)
11343788
MB		 1910 return newUNOP(OP_NOT, 0, scalar(o));
1911 return o;
79072805
LW		 1912 }
1913 else
1914 return bind_match(type, left,
1915 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1916}
1917
1918OP *
864dbfa3 1919Perl_invert(pTHX_ OP *o)
79072805 1920{
11343788
MB		 1921 if (!o)
1922 return o;
79072805 1923 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1924 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1925}
1926
1927OP *
864dbfa3 1928Perl_scope(pTHX_ OP *o)
79072805
LW		 1929{
1930 if (o) {
3280af22 1931 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1932 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1933 o->op_type = OP_LEAVE;
22c35a8c 1934 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1935 }
1936 else {
1937 if (o->op_type == OP_LINESEQ) {
1938 OP *kid;
1939 o->op_type = OP_SCOPE;
22c35a8c 1940 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1941 kid = ((LISTOP*)o)->op_first;
1942 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1943 null(kid);
463ee0b2
LW		 1944 }
1945 else
748a9306 1946 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1947 }
79072805
LW		 1948 }
1949 return o;
1950}
1951
b3ac6de7 1952void
864dbfa3 1953Perl_save_hints(pTHX)
b3ac6de7 1954{
3280af22
NIS		 1955 SAVEI32(PL_hints);
1956 SAVESPTR(GvHV(PL_hintgv));
1957 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1958 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1959}
1960
a0d0e21e 1961int
864dbfa3 1962Perl_block_start(pTHX_ int full)
79072805 1963{
11343788 1964 dTHR;
3280af22 1965 int retval = PL_savestack_ix;
b3ac6de7 1966
3280af22 1967 SAVEI32(PL_comppad_name_floor);
55497cff 1968 if (full) {
3280af22
NIS		 1969 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1970 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1971 else
3280af22
NIS		 1972 PL_comppad_name_floor = 0;
1973 }
1974 SAVEI32(PL_min_intro_pending);
1975 SAVEI32(PL_max_intro_pending);
1976 PL_min_intro_pending = 0;
1977 SAVEI32(PL_comppad_name_fill);
1978 SAVEI32(PL_padix_floor);
1979 PL_padix_floor = PL_padix;
1980 PL_pad_reset_pending = FALSE;
b3ac6de7 1981 SAVEHINTS();
3280af22 1982 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 1983 SAVESPTR(PL_compiling.cop_warnings);
0453d815 1984 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 1985 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1986 SAVEFREESV(PL_compiling.cop_warnings) ;
1987 }
1988
1989
a0d0e21e
LW		 1990 return retval;
1991}
1992
1993OP*
864dbfa3 1994Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 1995{
11343788 1996 dTHR;
3280af22 1997 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1998 OP* retval = scalarseq(seq);
a0d0e21e 1999 LEAVE_SCOPE(floor);
3280af22 2000 PL_pad_reset_pending = FALSE;
e24b16f9 2001 PL_compiling.op_private = PL_hints;
a0d0e21e 2002 if (needblockscope)
3280af22
NIS		 2003 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2004 pad_leavemy(PL_comppad_name_fill);
2005 PL_cop_seqmax++;
a0d0e21e
LW		 2006 return retval;
2007}
2008
76e3520e 2009STATIC OP *
cea2e8a9 2010S_newDEFSVOP(pTHX)
54b9620d
MB		 2011{
2012#ifdef USE_THREADS
2013 OP *o = newOP(OP_THREADSV, 0);
2014 o->op_targ = find_threadsv("_");
2015 return o;
2016#else
3280af22 2017 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2018#endif /* USE_THREADS */
2019}
2020
a0d0e21e 2021void
864dbfa3 2022Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2023{
11343788 2024 dTHR;
3280af22 2025 if (PL_in_eval) {
b295d113
TH		 2026 if (PL_eval_root)
2027 return;
faef0170
HS		 2028 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2029 ((PL_in_eval & EVAL_KEEPERR)
2030 ? OPf_SPECIAL : 0), o);
3280af22 2031 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2032 PL_eval_root->op_private |= OPpREFCOUNTED;
2033 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2034 PL_eval_root->op_next = 0;
2035 peep(PL_eval_start);
a0d0e21e
LW		 2036 }
2037 else {
5dc0d613 2038 if (!o)
a0d0e21e 2039 return;
3280af22
NIS		 2040 PL_main_root = scope(sawparens(scalarvoid(o)));
2041 PL_curcop = &PL_compiling;
2042 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2043 PL_main_root->op_private |= OPpREFCOUNTED;
2044 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2045 PL_main_root->op_next = 0;
2046 peep(PL_main_start);
2047 PL_compcv = 0;
3841441e 2048
4fdae800 2049 /* Register with debugger */
84902520 2050 if (PERLDB_INTER) {
864dbfa3 2051 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2052 if (cv) {
2053 dSP;
924508f0 2054 PUSHMARK(SP);
cc49e20b 2055 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2056 PUTBACK;
864dbfa3 2057 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2058 }
2059 }
79072805 2060 }
79072805
LW		 2061}
2062
2063OP *
864dbfa3 2064Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2065{
2066 if (o->op_flags & OPf_PARENS)
2067 list(o);
8990e307 2068 else {
d008e5eb 2069 dTHR;
599cee73 2070 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2071 char *s;
834a4ddd 2072 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2073 if (*s == ';' || *s == '=')
cea2e8a9 2074 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 2075 lex ? "my" : "local");
8990e307
LW		 2076 }
2077 }
3280af22
NIS		 2078 PL_in_my = FALSE;
2079 PL_in_my_stash = Nullhv;
93a17b20
LW		 2080 if (lex)
2081 return my(o);
2082 else
463ee0b2 2083 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 2084}
2085
2086OP *
864dbfa3 2087Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2088{
2089 if (o->op_type == OP_LIST) {
554b3eca
MB		 2090 OP *o2;
2091#ifdef USE_THREADS
2faa37cc 2092 o2 = newOP(OP_THREADSV, 0);
54b9620d 2093 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2094#else
2095 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2096#endif /* USE_THREADS */
2097 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2098 }
2099 return o;
2100}
2101
2102OP *
864dbfa3 2103Perl_fold_constants(pTHX_ register OP *o)
79072805 2104{
11343788 2105 dTHR;
79072805
LW		 2106 register OP *curop;
2107 I32 type = o->op_type;
748a9306 2108 SV *sv;
79072805 2109
22c35a8c 2110 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2111 scalar(o);
b162f9ea 2112 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2113 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2114
eac055e9
GS		 2115 /* integerize op, unless it happens to be C<-foo>.
2116 * XXX should pp_i_negate() do magic string negation instead? */
2117 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2118 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2119 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2120 {
22c35a8c 2121 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2122 }
85e6fe83 2123
22c35a8c 2124 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2125 goto nope;
2126
de939608 2127 switch (type) {
7a52d87a
GS		 2128 case OP_NEGATE:
2129 /* XXX might want a ck_negate() for this */
2130 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2131 break;
de939608
CS		 2132 case OP_SPRINTF:
2133 case OP_UCFIRST:
2134 case OP_LCFIRST:
2135 case OP_UC:
2136 case OP_LC:
69dcf70c
MB		 2137 case OP_SLT:
2138 case OP_SGT:
2139 case OP_SLE:
2140 case OP_SGE:
2141 case OP_SCMP:
2142
de939608
CS		 2143 if (o->op_private & OPpLOCALE)
2144 goto nope;
2145 }
2146
3280af22 2147 if (PL_error_count)
a0d0e21e
LW		 2148 goto nope; /* Don't try to run w/ errors */
2149
79072805 2150 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2151 if ((curop->op_type != OP_CONST ||
2152 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2153 curop->op_type != OP_LIST &&
2154 curop->op_type != OP_SCALAR &&
2155 curop->op_type != OP_NULL &&
2156 curop->op_type != OP_PUSHMARK)
2157 {
79072805
LW		 2158 goto nope;
2159 }
2160 }
2161
2162 curop = LINKLIST(o);
2163 o->op_next = 0;
533c011a 2164 PL_op = curop;
cea2e8a9 2165 CALLRUNOPS(aTHX);
3280af22 2166 sv = *(PL_stack_sp--);
748a9306 2167 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2168 pad_swipe(o->op_targ);
748a9306
LW		 2169 else if (SvTEMP(sv)) { /* grab mortal temp? */
2170 (void)SvREFCNT_inc(sv);
2171 SvTEMP_off(sv);
85e6fe83 2172 }
79072805
LW		 2173 op_free(o);
2174 if (type == OP_RV2GV)
b1cb66bf 2175 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2176 else {
ee580363
GS		 2177 /* try to smush double to int, but don't smush -2.0 to -2 */
2178 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2179 type != OP_NEGATE)
2180 {
748a9306 2181 IV iv = SvIV(sv);
65202027 2182 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2183 SvREFCNT_dec(sv);
2184 sv = newSViv(iv);
2185 }
b1cb66bf 2186 else
2187 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2188 }
2189 return newSVOP(OP_CONST, 0, sv);
2190 }
aeea060c 2191
79072805 2192 nope:
22c35a8c 2193 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2194 return o;
79072805 2195
3280af22 2196 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2197 if (type == OP_MODULO
2198 || type == OP_DIVIDE
2199 || !(o->op_flags & OPf_KIDS))
2200 {
85e6fe83 2201 return o;
4bb9f687 2202 }
85e6fe83
LW		 2203
2204 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2205 if (curop->op_type == OP_CONST) {
b1cb66bf 2206 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2207 continue;
2208 return o;
2209 }
22c35a8c 2210 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2211 continue;
2212 return o;
2213 }
22c35a8c 2214 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2215 }
2216
79072805
LW		 2217 return o;
2218}
2219
2220OP *
864dbfa3 2221Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2222{
11343788 2223 dTHR;
79072805 2224 register OP *curop;
3280af22 2225 I32 oldtmps_floor = PL_tmps_floor;
79072805 2226
a0d0e21e 2227 list(o);
3280af22 2228 if (PL_error_count)
a0d0e21e
LW		 2229 return o; /* Don't attempt to run with errors */
2230
533c011a 2231 PL_op = curop = LINKLIST(o);
a0d0e21e 2232 o->op_next = 0;
cea2e8a9
GS		 2233 pp_pushmark();
2234 CALLRUNOPS(aTHX);
533c011a 2235 PL_op = curop;
cea2e8a9 2236 pp_anonlist();
3280af22 2237 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2238
2239 o->op_type = OP_RV2AV;
22c35a8c 2240 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2241 curop = ((UNOP*)o)->op_first;
3280af22 2242 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2243 op_free(curop);
79072805
LW		 2244 linklist(o);
2245 return list(o);
2246}
2247
2248OP *
864dbfa3 2249Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2250{
2251 OP *kid;
a0d0e21e 2252 OP *last = 0;
79072805 2253
11343788
MB		 2254 if (!o || o->op_type != OP_LIST)
2255 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2256 else
5dc0d613 2257 o->op_flags &= ~OPf_WANT;
79072805 2258
22c35a8c 2259 if (!(PL_opargs[type] & OA_MARK))
11343788 2260 null(cLISTOPo->op_first);
8990e307 2261
11343788 2262 o->op_type = type;
22c35a8c 2263 o->op_ppaddr = PL_ppaddr[type];
11343788 2264 o->op_flags |= flags;
79072805 2265
11343788
MB		 2266 o = CHECKOP(type, o);
2267 if (o->op_type != type)
2268 return o;
79072805 2269
11343788 2270 if (cLISTOPo->op_children < 7) {
79072805 2271 /* XXX do we really need to do this if we're done appending?? */
11343788 2272 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2273 last = kid;
11343788 2274 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2275 }
2276
11343788 2277 return fold_constants(o);
79072805
LW		 2278}
2279
2280/* List constructors */
2281
2282OP *
864dbfa3 2283Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2284{
2285 if (!first)
2286 return last;
8990e307
LW		 2287
2288 if (!last)
79072805 2289 return first;
8990e307 2290
a0d0e21e
LW		 2291 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2292 return newLISTOP(type, 0, first, last);
79072805 2293
a0d0e21e
LW		 2294 if (first->op_flags & OPf_KIDS)
2295 ((LISTOP*)first)->op_last->op_sibling = last;
2296 else {
2297 first->op_flags |= OPf_KIDS;
2298 ((LISTOP*)first)->op_first = last;
2299 }
2300 ((LISTOP*)first)->op_last = last;
2301 ((LISTOP*)first)->op_children++;
2302 return first;
79072805
LW		 2303}
2304
2305OP *
864dbfa3 2306Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2307{
2308 if (!first)
2309 return (OP*)last;
8990e307
LW		 2310
2311 if (!last)
79072805 2312 return (OP*)first;
8990e307
LW		 2313
2314 if (first->op_type != type)
79072805 2315 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2316
2317 if (last->op_type != type)
79072805
LW		 2318 return append_elem(type, (OP*)first, (OP*)last);
2319
2320 first->op_last->op_sibling = last->op_first;
2321 first->op_last = last->op_last;
2322 first->op_children += last->op_children;
2323 if (first->op_children)
acb74605 2324 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2325
2326#ifdef PL_OP_SLAB_ALLOC
2327#else
2328 Safefree(last);
2329#endif
79072805
LW		 2330 return (OP*)first;
2331}
2332
2333OP *
864dbfa3 2334Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2335{
2336 if (!first)
2337 return last;
8990e307
LW		 2338
2339 if (!last)
79072805 2340 return first;
8990e307
LW		 2341
2342 if (last->op_type == type) {
2343 if (type == OP_LIST) { /* already a PUSHMARK there */
2344 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2345 ((LISTOP*)last)->op_first->op_sibling = first;
2346 }
2347 else {
2348 if (!(last->op_flags & OPf_KIDS)) {
2349 ((LISTOP*)last)->op_last = first;
2350 last->op_flags |= OPf_KIDS;
2351 }
2352 first->op_sibling = ((LISTOP*)last)->op_first;
2353 ((LISTOP*)last)->op_first = first;
79072805 2354 }
79072805
LW		 2355 ((LISTOP*)last)->op_children++;
2356 return last;
2357 }
2358
2359 return newLISTOP(type, 0, first, last);
2360}
2361
2362/* Constructors */
2363
2364OP *
864dbfa3 2365Perl_newNULLLIST(pTHX)
79072805 2366{
8990e307
LW		 2367 return newOP(OP_STUB, 0);
2368}
2369
2370OP *
864dbfa3 2371Perl_force_list(pTHX_ OP *o)
8990e307 2372{
11343788
MB		 2373 if (!o || o->op_type != OP_LIST)
2374 o = newLISTOP(OP_LIST, 0, o, Nullop);
2375 null(o);
2376 return o;
79072805
LW		 2377}
2378
2379OP *
864dbfa3 2380Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2381{
2382 LISTOP *listop;
2383
b7dc083c 2384 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2385
2386 listop->op_type = type;
22c35a8c 2387 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2388 listop->op_children = (first != 0) + (last != 0);
2389 listop->op_flags = flags;
79072805
LW		 2390
2391 if (!last && first)
2392 last = first;
2393 else if (!first && last)
2394 first = last;
8990e307
LW		 2395 else if (first)
2396 first->op_sibling = last;
79072805
LW		 2397 listop->op_first = first;
2398 listop->op_last = last;
8990e307
LW		 2399 if (type == OP_LIST) {
2400 OP* pushop;
2401 pushop = newOP(OP_PUSHMARK, 0);
2402 pushop->op_sibling = first;
2403 listop->op_first = pushop;
2404 listop->op_flags |= OPf_KIDS;
2405 if (!last)
2406 listop->op_last = pushop;
2407 }
2408 else if (listop->op_children)
2409 listop->op_flags |= OPf_KIDS;
79072805
LW		 2410
2411 return (OP*)listop;
2412}
2413
2414OP *
864dbfa3 2415Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2416{
11343788 2417 OP *o;
b7dc083c 2418 NewOp(1101, o, 1, OP);
11343788 2419 o->op_type = type;
22c35a8c 2420 o->op_ppaddr = PL_ppaddr[type];
11343788 2421 o->op_flags = flags;
79072805 2422
11343788
MB		 2423 o->op_next = o;
2424 o->op_private = 0 + (flags >> 8);
22c35a8c 2425 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2426 scalar(o);
22c35a8c 2427 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2428 o->op_targ = pad_alloc(type, SVs_PADTMP);
2429 return CHECKOP(type, o);
79072805
LW		 2430}
2431
2432OP *
864dbfa3 2433Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2434{
2435 UNOP *unop;
2436
93a17b20 2437 if (!first)
aeea060c 2438 first = newOP(OP_STUB, 0);
22c35a8c 2439 if (PL_opargs[type] & OA_MARK)
8990e307 2440 first = force_list(first);
93a17b20 2441
b7dc083c 2442 NewOp(1101, unop, 1, UNOP);
79072805 2443 unop->op_type = type;
22c35a8c 2444 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2445 unop->op_first = first;
2446 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2447 unop->op_private = 1 | (flags >> 8);
e50aee73 2448 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2449 if (unop->op_next)
2450 return (OP*)unop;
2451
a0d0e21e 2452 return fold_constants((OP *) unop);
79072805
LW		 2453}
2454
2455OP *
864dbfa3 2456Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2457{
2458 BINOP *binop;
b7dc083c 2459 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2460
2461 if (!first)
2462 first = newOP(OP_NULL, 0);
2463
2464 binop->op_type = type;
22c35a8c 2465 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2466 binop->op_first = first;
2467 binop->op_flags = flags | OPf_KIDS;
2468 if (!last) {
2469 last = first;
c07a80fd 2470 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2471 }
2472 else {
c07a80fd 2473 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2474 first->op_sibling = last;
2475 }
2476
e50aee73 2477 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2478 if (binop->op_next || binop->op_type != type)
79072805
LW		 2479 return (OP*)binop;
2480
7284ab6f 2481 binop->op_last = binop->op_first->op_sibling;
79072805 2482
a0d0e21e 2483 return fold_constants((OP *)binop);
79072805
LW		 2484}
2485
a0ed51b3
LW		 2486static int
2487utf8compare(const void *a, const void *b)
2488{
2489 int i;
2490 for (i = 0; i < 10; i++) {
2491 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2492 return -1;
2493 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2494 return 1;
2495 }
2496 return 0;
2497}
2498
79072805 2499OP *
864dbfa3 2500Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2501{
79072805
LW		 2502 SV *tstr = ((SVOP*)expr)->op_sv;
2503 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2504 STRLEN tlen;
2505 STRLEN rlen;
ec49126f 2506 register U8 *t = (U8*)SvPV(tstr, tlen);
2507 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2508 register I32 i;
2509 register I32 j;
a0ed51b3 2510 I32 del;
79072805 2511 I32 complement;
5d06d08e 2512 I32 squash;
79072805
LW		 2513 register short *tbl;
2514
11343788 2515 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2516 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2517 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2518
a0ed51b3 2519 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2520 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2521 SV* transv = 0;
2522 U8* tend = t + tlen;
2523 U8* rend = r + rlen;
2524 I32 ulen;
2525 U32 tfirst = 1;
2526 U32 tlast = 0;
2527 I32 tdiff;
2528 U32 rfirst = 1;
2529 U32 rlast = 0;
2530 I32 rdiff;
2531 I32 diff;
2532 I32 none = 0;
2533 U32 max = 0;
2534 I32 bits;
2535 I32 grows = 0;
2536 I32 havefinal = 0;
2537 U32 final;
2538 HV *hv;
2539 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2540 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2541
2542 if (complement) {
2543 U8 tmpbuf[10];
2544 U8** cp;
2545 UV nextmin = 0;
2546 New(1109, cp, tlen, U8*);
2547 i = 0;
79cb57f6 2548 transv = newSVpvn("",0);
a0ed51b3
LW		 2549 while (t < tend) {
2550 cp[i++] = t;
2551 t += UTF8SKIP(t);
2552 if (*t == 0xff) {
2553 t++;
2554 t += UTF8SKIP(t);
2555 }
2556 }
2557 qsort(cp, i, sizeof(U8*), utf8compare);
2558 for (j = 0; j < i; j++) {
2559 U8 *s = cp[j];
2560 UV val = utf8_to_uv(s, &ulen);
2561 s += ulen;
2562 diff = val - nextmin;
2563 if (diff > 0) {
2564 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2565 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2566 if (diff > 1) {
2567 t = uv_to_utf8(tmpbuf, val - 1);
2568 sv_catpvn(transv, "\377", 1);
dfe13c55 2569 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2570 }
2571 }
2572 if (*s == 0xff)
2573 val = utf8_to_uv(s+1, &ulen);
2574 if (val >= nextmin)
2575 nextmin = val + 1;
2576 }
2577 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2578 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2579 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2580 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2581 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2582 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2583 tlen = SvCUR(transv);
2584 tend = t + tlen;
2585 }
2586 else if (!rlen && !del) {
2587 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2588 }
2589 if (!squash) {
2590 if (to_utf && from_utf) { /* only counting characters */
2591 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2592 o->op_private |= OPpTRANS_IDENTICAL;
2593 }
2594 else { /* straight latin-1 translation */
2595 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2596 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2597 o->op_private |= OPpTRANS_IDENTICAL;
2598 }
a0ed51b3
LW		 2599 }
2600
2601 while (t < tend || tfirst <= tlast) {
2602 /* see if we need more "t" chars */
2603 if (tfirst > tlast) {
2604 tfirst = (I32)utf8_to_uv(t, &ulen);
2605 t += ulen;
2606 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2607 tlast = (I32)utf8_to_uv(++t, &ulen);
2608 t += ulen;
2609 }
2610 else
2611 tlast = tfirst;
2612 }
2613
2614 /* now see if we need more "r" chars */
2615 if (rfirst > rlast) {
2616 if (r < rend) {
2617 rfirst = (I32)utf8_to_uv(r, &ulen);
2618 r += ulen;
2619 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2620 rlast = (I32)utf8_to_uv(++r, &ulen);
2621 r += ulen;
2622 }
2623 else
2624 rlast = rfirst;
2625 }
2626 else {
2627 if (!havefinal++)
2628 final = rlast;
2629 rfirst = rlast = 0xffffffff;
2630 }
2631 }
2632
2633 /* now see which range will peter our first, if either. */
2634 tdiff = tlast - tfirst;
2635 rdiff = rlast - rfirst;
2636
2637 if (tdiff <= rdiff)
2638 diff = tdiff;
2639 else
2640 diff = rdiff;
2641
2642 if (rfirst == 0xffffffff) {
2643 diff = tdiff; /* oops, pretend rdiff is infinite */
2644 if (diff > 0)
cea2e8a9 2645 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
a0ed51b3 2646 else
cea2e8a9 2647 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\tXXXX\n", tfirst);
a0ed51b3
LW		 2648 }
2649 else {
2650 if (diff > 0)
cea2e8a9 2651 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
a0ed51b3 2652 else
cea2e8a9 2653 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\t%04x\n", tfirst, rfirst);
a0ed51b3
LW		 2654
2655 if (rfirst + diff > max)
2656 max = rfirst + diff;
2657 rfirst += diff + 1;
2658 if (!grows) {
2659 if (rfirst <= 0x80)
2660 ;
2661 else if (rfirst <= 0x800)
2662 grows |= (tfirst < 0x80);
2663 else if (rfirst <= 0x10000)
2664 grows |= (tfirst < 0x800);
2665 else if (rfirst <= 0x200000)
2666 grows |= (tfirst < 0x10000);
2667 else if (rfirst <= 0x4000000)
2668 grows |= (tfirst < 0x200000);
2669 else if (rfirst <= 0x80000000)
2670 grows |= (tfirst < 0x4000000);
2671 }
2672 }
2673 tfirst += diff + 1;
2674 }
2675
2676 none = ++max;
2677 if (del)
2678 del = ++max;
2679
2680 if (max > 0xffff)
2681 bits = 32;
2682 else if (max > 0xff)
2683 bits = 16;
2684 else
2685 bits = 8;
2686
2687 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2688 SvREFCNT_dec(listsv);
2689 if (transv)
2690 SvREFCNT_dec(transv);
2691
2692 if (!del && havefinal)
2693 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2694
2695 if (grows && to_utf)
2696 o->op_private |= OPpTRANS_GROWS;
2697
2698 op_free(expr);
2699 op_free(repl);
2700 return o;
2701 }
2702
2703 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2704 if (complement) {
2705 Zero(tbl, 256, short);
2706 for (i = 0; i < tlen; i++)
ec49126f 2707 tbl[t[i]] = -1;
79072805
LW		 2708 for (i = 0, j = 0; i < 256; i++) {
2709 if (!tbl[i]) {
2710 if (j >= rlen) {
a0ed51b3 2711 if (del)
79072805
LW		 2712 tbl[i] = -2;
2713 else if (rlen)
ec49126f 2714 tbl[i] = r[j-1];
79072805
LW		 2715 else
2716 tbl[i] = i;
2717 }
2718 else
ec49126f 2719 tbl[i] = r[j++];
79072805
LW		 2720 }
2721 }
2722 }
2723 else {
a0ed51b3 2724 if (!rlen && !del) {
79072805 2725 r = t; rlen = tlen;
5d06d08e 2726 if (!squash)
4757a243 2727 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2728 }
2729 for (i = 0; i < 256; i++)
2730 tbl[i] = -1;
2731 for (i = 0, j = 0; i < tlen; i++,j++) {
2732 if (j >= rlen) {
a0ed51b3 2733 if (del) {
ec49126f 2734 if (tbl[t[i]] == -1)
2735 tbl[t[i]] = -2;
79072805
LW		 2736 continue;
2737 }
2738 --j;
2739 }
ec49126f 2740 if (tbl[t[i]] == -1)
2741 tbl[t[i]] = r[j];
79072805
LW		 2742 }
2743 }
2744 op_free(expr);
2745 op_free(repl);
2746
11343788 2747 return o;
79072805
LW		 2748}
2749
2750OP *
864dbfa3 2751Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2752{
11343788 2753 dTHR;
79072805
LW		 2754 PMOP *pmop;
2755
b7dc083c 2756 NewOp(1101, pmop, 1, PMOP);
79072805 2757 pmop->op_type = type;
22c35a8c 2758 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2759 pmop->op_flags = flags;
c07a80fd 2760 pmop->op_private = 0 | (flags >> 8);
79072805 2761
3280af22 2762 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2763 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2764 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2765 pmop->op_pmpermflags |= PMf_LOCALE;
2766 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2767
79072805 2768 /* link into pm list */
3280af22
NIS		 2769 if (type != OP_TRANS && PL_curstash) {
2770 pmop->op_pmnext = HvPMROOT(PL_curstash);
2771 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2772 }
2773
2774 return (OP*)pmop;
2775}
2776
2777OP *
864dbfa3 2778Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2779{
5c0ca799 2780 dTHR;
79072805
LW		 2781 PMOP *pm;
2782 LOGOP *rcop;
ce862d02 2783 I32 repl_has_vars = 0;
79072805 2784
11343788
MB		 2785 if (o->op_type == OP_TRANS)
2786 return pmtrans(o, expr, repl);
79072805 2787
3280af22 2788 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2789 pm = (PMOP*)o;
79072805
LW		 2790
2791 if (expr->op_type == OP_CONST) {
463ee0b2 2792 STRLEN plen;
79072805 2793 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2794 char *p = SvPV(pat, plen);
11343788 2795 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2796 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2797 p = SvPV(pat, plen);
79072805
LW		 2798 pm->op_pmflags |= PMf_SKIPWHITE;
2799 }
cea2e8a9 2800 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2801 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2802 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2803 op_free(expr);
2804 }
2805 else {
3280af22
NIS		 2806 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2807 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2808 ? OP_REGCRESET
2809 : OP_REGCMAYBE),0,expr);
463ee0b2 2810
b7dc083c 2811 NewOp(1101, rcop, 1, LOGOP);
79072805 2812 rcop->op_type = OP_REGCOMP;
22c35a8c 2813 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2814 rcop->op_first = scalar(expr);
3280af22 2815 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2816 ? (OPf_SPECIAL | OPf_KIDS)
2817 : OPf_KIDS);
79072805 2818 rcop->op_private = 1;
11343788 2819 rcop->op_other = o;
79072805
LW		 2820
2821 /* establish postfix order */
3280af22 2822 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2823 LINKLIST(expr);
2824 rcop->op_next = expr;
2825 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2826 }
2827 else {
2828 rcop->op_next = LINKLIST(expr);
2829 expr->op_next = (OP*)rcop;
2830 }
79072805 2831
11343788 2832 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2833 }
2834
2835 if (repl) {
748a9306 2836 OP *curop;
0244c3a4 2837 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2838 curop = 0;
57843af0
GS		 2839 if (CopLINE(PL_curcop) < PL_multi_end)
2840 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2841 }
554b3eca 2842#ifdef USE_THREADS
2faa37cc 2843 else if (repl->op_type == OP_THREADSV
554b3eca 2844 && strchr("&`'123456789+",
533c011a 2845 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2846 {
2847 curop = 0;
2848 }
2849#endif /* USE_THREADS */
748a9306
LW		 2850 else if (repl->op_type == OP_CONST)
2851 curop = repl;
79072805 2852 else {
79072805
LW		 2853 OP *lastop = 0;
2854 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2855 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2856#ifdef USE_THREADS
ce862d02
IZ		 2857 if (curop->op_type == OP_THREADSV) {
2858 repl_has_vars = 1;
be949f6f 2859 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2860 break;
554b3eca
MB		 2861 }
2862#else
79072805 2863 if (curop->op_type == OP_GV) {
638eceb6 2864 GV *gv = cGVOPx_gv(curop);
ce862d02 2865 repl_has_vars = 1;
93a17b20 2866 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2867 break;
2868 }
554b3eca 2869#endif /* USE_THREADS */
79072805
LW		 2870 else if (curop->op_type == OP_RV2CV)
2871 break;
2872 else if (curop->op_type == OP_RV2SV ||
2873 curop->op_type == OP_RV2AV ||
2874 curop->op_type == OP_RV2HV ||
2875 curop->op_type == OP_RV2GV) {
2876 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2877 break;
2878 }
748a9306
LW		 2879 else if (curop->op_type == OP_PADSV ||
2880 curop->op_type == OP_PADAV ||
2881 curop->op_type == OP_PADHV ||
554b3eca 2882 curop->op_type == OP_PADANY) {
ce862d02 2883 repl_has_vars = 1;
748a9306 2884 }
1167e5da
SM		 2885 else if (curop->op_type == OP_PUSHRE)
2886 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2887 else
2888 break;
2889 }
2890 lastop = curop;
2891 }
748a9306 2892 }
ce862d02
IZ		 2893 if (curop == repl
2894 && !(repl_has_vars
2895 && (!pm->op_pmregexp
2896 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2897 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2898 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2899 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2900 }
2901 else {
ce862d02
IZ		 2902 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2903 pm->op_pmflags |= PMf_MAYBE_CONST;
2904 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2905 }
b7dc083c 2906 NewOp(1101, rcop, 1, LOGOP);
748a9306 2907 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2908 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2909 rcop->op_first = scalar(repl);
2910 rcop->op_flags |= OPf_KIDS;
2911 rcop->op_private = 1;
11343788 2912 rcop->op_other = o;
748a9306
LW		 2913
2914 /* establish postfix order */
2915 rcop->op_next = LINKLIST(repl);
2916 repl->op_next = (OP*)rcop;
2917
2918 pm->op_pmreplroot = scalar((OP*)rcop);
2919 pm->op_pmreplstart = LINKLIST(rcop);
2920 rcop->op_next = 0;
79072805
LW		 2921 }
2922 }
2923
2924 return (OP*)pm;
2925}
2926
2927OP *
864dbfa3 2928Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2929{
2930 SVOP *svop;
b7dc083c 2931 NewOp(1101, svop, 1, SVOP);
79072805 2932 svop->op_type = type;
22c35a8c 2933 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2934 svop->op_sv = sv;
2935 svop->op_next = (OP*)svop;
2936 svop->op_flags = flags;
22c35a8c 2937 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2938 scalar((OP*)svop);
22c35a8c 2939 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2940 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2941 return CHECKOP(type, svop);
79072805
LW		 2942}
2943
2944OP *
350de78d
GS		 2945Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
2946{
2947 PADOP *padop;
2948 NewOp(1101, padop, 1, PADOP);
2949 padop->op_type = type;
2950 padop->op_ppaddr = PL_ppaddr[type];
2951 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 2952 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 2953 PL_curpad[padop->op_padix] = sv;
7766f137 2954 SvPADTMP_on(sv);
350de78d
GS		 2955 padop->op_next = (OP*)padop;
2956 padop->op_flags = flags;
2957 if (PL_opargs[type] & OA_RETSCALAR)
2958 scalar((OP*)padop);
2959 if (PL_opargs[type] & OA_TARGET)
2960 padop->op_targ = pad_alloc(type, SVs_PADTMP);
2961 return CHECKOP(type, padop);
2962}
2963
2964OP *
864dbfa3 2965Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 2966{
11343788 2967 dTHR;
350de78d 2968#ifdef USE_ITHREADS
743e66e6 2969 GvIN_PAD_on(gv);
350de78d
GS		 2970 return newPADOP(type, flags, SvREFCNT_inc(gv));
2971#else
7934575e 2972 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 2973#endif
79072805
LW		 2974}
2975
2976OP *
864dbfa3 2977Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 2978{
2979 PVOP *pvop;
b7dc083c 2980 NewOp(1101, pvop, 1, PVOP);
79072805 2981 pvop->op_type = type;
22c35a8c 2982 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2983 pvop->op_pv = pv;
2984 pvop->op_next = (OP*)pvop;
2985 pvop->op_flags = flags;
22c35a8c 2986 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2987 scalar((OP*)pvop);
22c35a8c 2988 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2989 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2990 return CHECKOP(type, pvop);
79072805
LW		 2991}
2992
79072805 2993void
864dbfa3 2994Perl_package(pTHX_ OP *o)
79072805 2995{
11343788 2996 dTHR;
93a17b20 2997 SV *sv;
79072805 2998
3280af22
NIS		 2999 save_hptr(&PL_curstash);
3000 save_item(PL_curstname);
11343788 3001 if (o) {
463ee0b2
LW		 3002 STRLEN len;
3003 char *name;
11343788 3004 sv = cSVOPo->op_sv;
463ee0b2 3005 name = SvPV(sv, len);
3280af22
NIS		 3006 PL_curstash = gv_stashpvn(name,len,TRUE);
3007 sv_setpvn(PL_curstname, name, len);
11343788 3008 op_free(o);
93a17b20
LW		 3009 }
3010 else {
3280af22
NIS		 3011 sv_setpv(PL_curstname,"<none>");
3012 PL_curstash = Nullhv;
93a17b20 3013 }
7ad382f4 3014 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3015 PL_copline = NOLINE;
3016 PL_expect = XSTATE;
79072805
LW		 3017}
3018
85e6fe83 3019void
864dbfa3 3020Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3021{
a0d0e21e
LW		 3022 OP *pack;
3023 OP *meth;
3024 OP *rqop;
3025 OP *imop;
b1cb66bf 3026 OP *veop;
78ca652e 3027 GV *gv;
85e6fe83 3028
a0d0e21e 3029 if (id->op_type != OP_CONST)
cea2e8a9 3030 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3031
b1cb66bf 3032 veop = Nullop;
3033
3034 if(version != Nullop) {
3035 SV *vesv = ((SVOP*)version)->op_sv;
3036
3037 if (arg == Nullop && !SvNIOK(vesv)) {
3038 arg = version;
3039 }
3040 else {
3041 OP *pack;
b1cb66bf 3042
3043 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 3044 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3045
3046 /* Make copy of id so we don't free it twice */
3047 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3048
3049 /* Fake up a method call to VERSION */
b1cb66bf 3050 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3051 append_elem(OP_LIST,
3052 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 3053 newSVOP(OP_METHOD_NAMED, 0,
3054 newSVpvn("VERSION", 7))));
b1cb66bf 3055 }
3056 }
aeea060c 3057
a0d0e21e 3058 /* Fake up an import/unimport */
4633a7c4
LW		 3059 if (arg && arg->op_type == OP_STUB)
3060 imop = arg; /* no import on explicit () */
b1cb66bf 3061 else if(SvNIOK(((SVOP*)id)->op_sv)) {
3062 imop = Nullop; /* use 5.0; */
3063 }
4633a7c4
LW		 3064 else {
3065 /* Make copy of id so we don't free it twice */
3066 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 3067 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 3068 append_elem(OP_LIST,
3069 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 3070 newSVOP(OP_METHOD_NAMED, 0,
3071 aver ? newSVpvn("import", 6)
3072 : newSVpvn("unimport", 8))));
4633a7c4
LW		 3073 }
3074
78ca652e
GS		 3075 /* Fake up a require, handle override, if any */
3076 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3077 if (!(gv && GvIMPORTED_CV(gv)))
3078 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3079
3080 if (gv && GvIMPORTED_CV(gv)) {
3081 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3082 append_elem(OP_LIST, id,
3083 scalar(newUNOP(OP_RV2CV, 0,
3084 newGVOP(OP_GV, 0,
3085 gv))))));
3086 }
3087 else {
3088 rqop = newUNOP(OP_REQUIRE, 0, id);
3089 }
a0d0e21e
LW		 3090
3091 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3092 newATTRSUB(floor,
79cb57f6 3093 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3094 Nullop,
09bef843 3095 Nullop,
a0d0e21e 3096 append_elem(OP_LINESEQ,
b1cb66bf 3097 append_elem(OP_LINESEQ,
3098 newSTATEOP(0, Nullch, rqop),
3099 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3100 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3101
c305c6a0 3102 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3103 PL_copline = NOLINE;
3104 PL_expect = XSTATE;
85e6fe83
LW		 3105}
3106
79072805 3107OP *
864dbfa3 3108Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3109{
3110 OP *doop;
3111 GV *gv;
3112
3113 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3114 if (!(gv && GvIMPORTED_CV(gv)))
3115 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3116
3117 if (gv && GvIMPORTED_CV(gv)) {
3118 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3119 append_elem(OP_LIST, term,
3120 scalar(newUNOP(OP_RV2CV, 0,
3121 newGVOP(OP_GV, 0,
3122 gv))))));
3123 }
3124 else {
3125 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3126 }
3127 return doop;
3128}
3129
3130OP *
864dbfa3 3131Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3132{
3133 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3134 list(force_list(subscript)),
3135 list(force_list(listval)) );
79072805
LW		 3136}
3137
76e3520e 3138STATIC I32
cea2e8a9 3139S_list_assignment(pTHX_ register OP *o)
79072805 3140{
11343788 3141 if (!o)
79072805
LW		 3142 return TRUE;
3143
11343788
MB		 3144 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3145 o = cUNOPo->op_first;
79072805 3146
11343788 3147 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3148 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3149 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3150
3151 if (t && f)
3152 return TRUE;
3153 if (t || f)
3154 yyerror("Assignment to both a list and a scalar");
3155 return FALSE;
3156 }
3157
11343788
MB		 3158 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3159 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3160 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3161 return TRUE;
3162
11343788 3163 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3164 return TRUE;
3165
11343788 3166 if (o->op_type == OP_RV2SV)
79072805
LW		 3167 return FALSE;
3168
3169 return FALSE;
3170}
3171
3172OP *
864dbfa3 3173Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3174{
11343788 3175 OP *o;
79072805 3176
a0d0e21e
LW		 3177 if (optype) {
3178 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3179 return newLOGOP(optype, 0,
3180 mod(scalar(left), optype),
3181 newUNOP(OP_SASSIGN, 0, scalar(right)));
3182 }
3183 else {
3184 return newBINOP(optype, OPf_STACKED,
3185 mod(scalar(left), optype), scalar(right));
3186 }
3187 }
3188
79072805 3189 if (list_assignment(left)) {
6ee623d5 3190 dTHR;
3280af22
NIS		 3191 PL_modcount = 0;
3192 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3193 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3194 if (PL_eval_start)
3195 PL_eval_start = 0;
748a9306 3196 else {
a0d0e21e
LW		 3197 op_free(left);
3198 op_free(right);
3199 return Nullop;
3200 }
11343788 3201 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3202 list(force_list(right)),
3203 list(force_list(left)) );
11343788 3204 o->op_private = 0 | (flags >> 8);
a0d0e21e 3205 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3206 OP *curop;
11343788 3207 OP *lastop = o;
3280af22 3208 PL_generation++;
11343788 3209 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3210 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3211 if (curop->op_type == OP_GV) {
638eceb6 3212 GV *gv = cGVOPx_gv(curop);
3280af22 3213 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3214 break;
3280af22 3215 SvCUR(gv) = PL_generation;
79072805 3216 }
748a9306
LW		 3217 else if (curop->op_type == OP_PADSV ||
3218 curop->op_type == OP_PADAV ||
3219 curop->op_type == OP_PADHV ||
3220 curop->op_type == OP_PADANY) {
3280af22 3221 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3222 SV *sv = svp[curop->op_targ];
3280af22 3223 if (SvCUR(sv) == PL_generation)
748a9306 3224 break;
3280af22 3225 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3226 }
79072805
LW		 3227 else if (curop->op_type == OP_RV2CV)
3228 break;
3229 else if (curop->op_type == OP_RV2SV ||
3230 curop->op_type == OP_RV2AV ||
3231 curop->op_type == OP_RV2HV ||
3232 curop->op_type == OP_RV2GV) {
3233 if (lastop->op_type != OP_GV) /* funny deref? */
3234 break;
3235 }
1167e5da
SM		 3236 else if (curop->op_type == OP_PUSHRE) {
3237 if (((PMOP*)curop)->op_pmreplroot) {
3238 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3239 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3240 break;
3280af22 3241 SvCUR(gv) = PL_generation;
1167e5da
SM		 3242 }
3243 }
79072805
LW		 3244 else
3245 break;
3246 }
3247 lastop = curop;
3248 }
11343788
MB		 3249 if (curop != o)
3250 o->op_private = OPpASSIGN_COMMON;
79072805 3251 }
c07a80fd 3252 if (right && right->op_type == OP_SPLIT) {
3253 OP* tmpop;
3254 if ((tmpop = ((LISTOP*)right)->op_first) &&
3255 tmpop->op_type == OP_PUSHRE)
3256 {
3257 PMOP *pm = (PMOP*)tmpop;
3258 if (left->op_type == OP_RV2AV &&
3259 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3260 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3261 {
3262 tmpop = ((UNOP*)left)->op_first;
3263 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3264#ifdef USE_ITHREADS
3265 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3266 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3267#else
3268 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3269 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3270#endif
c07a80fd 3271 pm->op_pmflags |= PMf_ONCE;
11343788 3272 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3273 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3274 tmpop->op_sibling = Nullop; /* don't free split */
3275 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3276 op_free(o); /* blow off assign */
54310121 3277 right->op_flags &= ~OPf_WANT;
a5f75d66 3278 /* "I don't know and I don't care." */
c07a80fd 3279 return right;
3280 }
3281 }
3282 else {
3280af22 3283 if (PL_modcount < 10000 &&
c07a80fd 3284 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3285 {
3286 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3287 if (SvIVX(sv) == 0)
3280af22 3288 sv_setiv(sv, PL_modcount+1);
c07a80fd 3289 }
3290 }
3291 }
3292 }
11343788 3293 return o;
79072805
LW		 3294 }
3295 if (!right)
3296 right = newOP(OP_UNDEF, 0);
3297 if (right->op_type == OP_READLINE) {
3298 right->op_flags |= OPf_STACKED;
463ee0b2 3299 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3300 }
a0d0e21e 3301 else {
3280af22 3302 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3303 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3304 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3305 if (PL_eval_start)
3306 PL_eval_start = 0;
748a9306 3307 else {
11343788 3308 op_free(o);
a0d0e21e
LW		 3309 return Nullop;
3310 }
3311 }
11343788 3312 return o;
79072805
LW		 3313}
3314
3315OP *
864dbfa3 3316Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3317{
11343788 3318 dTHR;
bbce6d69 3319 U32 seq = intro_my();
79072805
LW		 3320 register COP *cop;
3321
b7dc083c 3322 NewOp(1101, cop, 1, COP);
57843af0 3323 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3324 cop->op_type = OP_DBSTATE;
22c35a8c 3325 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3326 }
3327 else {
3328 cop->op_type = OP_NEXTSTATE;
22c35a8c 3329 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3330 }
79072805 3331 cop->op_flags = flags;
a0ed51b3 3332 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3333#ifdef NATIVE_HINTS
3334 cop->op_private |= NATIVE_HINTS;
3335#endif
e24b16f9 3336 PL_compiling.op_private = cop->op_private;
79072805
LW		 3337 cop->op_next = (OP*)cop;
3338
463ee0b2
LW		 3339 if (label) {
3340 cop->cop_label = label;
3280af22 3341 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3342 }
bbce6d69 3343 cop->cop_seq = seq;
3280af22 3344 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3345 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3346 cop->cop_warnings = PL_curcop->cop_warnings ;
3347 else
3348 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3349
79072805 3350
3280af22 3351 if (PL_copline == NOLINE)
57843af0 3352 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3353 else {
57843af0 3354 CopLINE_set(cop, PL_copline);
3280af22 3355 PL_copline = NOLINE;
79072805 3356 }
57843af0
GS		 3357#ifdef USE_ITHREADS
3358 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3359#else
cc49e20b 3360 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3361#endif
11faa288 3362 CopSTASH_set(cop, PL_curstash);
79072805 3363
3280af22 3364 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3365 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3366 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3367 (void)SvIOK_on(*svp);
57b2e452 3368 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3369 }
3370 }
3371
11343788 3372 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3373}
3374
bbce6d69 3375/* "Introduce" my variables to visible status. */
3376U32
864dbfa3 3377Perl_intro_my(pTHX)
bbce6d69 3378{
3379 SV **svp;
3380 SV *sv;
3381 I32 i;
3382
3280af22
NIS		 3383 if (! PL_min_intro_pending)
3384 return PL_cop_seqmax;
bbce6d69 3385
3280af22
NIS		 3386 svp = AvARRAY(PL_comppad_name);
3387 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3388 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3389 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3390 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3391 }
3392 }
3280af22
NIS		 3393 PL_min_intro_pending = 0;
3394 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3395 return PL_cop_seqmax++;
bbce6d69 3396}
3397
79072805 3398OP *
864dbfa3 3399Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3400{
883ffac3
CS		 3401 return new_logop(type, flags, &first, &other);
3402}
3403
3bd495df 3404STATIC OP *
cea2e8a9 3405S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3406{
11343788 3407 dTHR;
79072805 3408 LOGOP *logop;
11343788 3409 OP *o;
883ffac3
CS		 3410 OP *first = *firstp;
3411 OP *other = *otherp;
79072805 3412
a0d0e21e
LW		 3413 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3414 return newBINOP(type, flags, scalar(first), scalar(other));
3415
8990e307 3416 scalarboolean(first);
79072805
LW		 3417 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3418 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3419 if (type == OP_AND || type == OP_OR) {
3420 if (type == OP_AND)
3421 type = OP_OR;
3422 else
3423 type = OP_AND;
11343788 3424 o = first;
883ffac3 3425 first = *firstp = cUNOPo->op_first;
11343788
MB		 3426 if (o->op_next)
3427 first->op_next = o->op_next;
3428 cUNOPo->op_first = Nullop;
3429 op_free(o);
79072805
LW		 3430 }
3431 }
3432 if (first->op_type == OP_CONST) {
599cee73 3433 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3434 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3435 PL_op_desc[type]);
79072805
LW		 3436 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3437 op_free(first);
883ffac3 3438 *firstp = Nullop;
79072805
LW		 3439 return other;
3440 }
3441 else {
3442 op_free(other);
883ffac3 3443 *otherp = Nullop;
79072805
LW		 3444 return first;
3445 }
3446 }
3447 else if (first->op_type == OP_WANTARRAY) {
3448 if (type == OP_AND)
3449 list(other);
3450 else
3451 scalar(other);
3452 }
599cee73 3453 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3454 OP *k1 = ((UNOP*)first)->op_first;
3455 OP *k2 = k1->op_sibling;
3456 OPCODE warnop = 0;
3457 switch (first->op_type)
3458 {
3459 case OP_NULL:
3460 if (k2 && k2->op_type == OP_READLINE
3461 && (k2->op_flags & OPf_STACKED)
55d729e4 3462 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3463 {
a6006777 3464 warnop = k2->op_type;
72b16652 3465 }
a6006777 3466 break;
3467
3468 case OP_SASSIGN:
68dc0745 3469 if (k1->op_type == OP_READDIR
3470 || k1->op_type == OP_GLOB
72b16652 3471 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3472 || k1->op_type == OP_EACH)
72b16652
GS		 3473 {
3474 warnop = ((k1->op_type == OP_NULL)
3475 ? k1->op_targ : k1->op_type);
3476 }
a6006777 3477 break;
3478 }
8ebc5c01 3479 if (warnop) {
57843af0
GS		 3480 line_t oldline = CopLINE(PL_curcop);
3481 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 3482 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3483 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3484 PL_op_desc[warnop],
68dc0745 3485 ((warnop == OP_READLINE || warnop == OP_GLOB)
3486 ? " construct" : "() operator"));
57843af0 3487 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3488 }
a6006777 3489 }
79072805
LW		 3490
3491 if (!other)
3492 return first;
3493
a0d0e21e
LW		 3494 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3495 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3496
b7dc083c 3497 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3498
3499 logop->op_type = type;
22c35a8c 3500 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3501 logop->op_first = first;
3502 logop->op_flags = flags | OPf_KIDS;
3503 logop->op_other = LINKLIST(other);
c07a80fd 3504 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3505
3506 /* establish postfix order */
3507 logop->op_next = LINKLIST(first);
3508 first->op_next = (OP*)logop;
3509 first->op_sibling = other;
3510
11343788
MB		 3511 o = newUNOP(OP_NULL, 0, (OP*)logop);
3512 other->op_next = o;
79072805 3513
11343788 3514 return o;
79072805
LW		 3515}
3516
3517OP *
864dbfa3 3518Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3519{
11343788 3520 dTHR;
1a67a97c
SM		 3521 LOGOP *logop;
3522 OP *start;
11343788 3523 OP *o;
79072805 3524
b1cb66bf 3525 if (!falseop)
3526 return newLOGOP(OP_AND, 0, first, trueop);
3527 if (!trueop)
3528 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3529
8990e307 3530 scalarboolean(first);
79072805
LW		 3531 if (first->op_type == OP_CONST) {
3532 if (SvTRUE(((SVOP*)first)->op_sv)) {
3533 op_free(first);
b1cb66bf 3534 op_free(falseop);
3535 return trueop;
79072805
LW		 3536 }
3537 else {
3538 op_free(first);
b1cb66bf 3539 op_free(trueop);
3540 return falseop;
79072805
LW		 3541 }
3542 }
3543 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3544 list(trueop);
3545 scalar(falseop);
79072805 3546 }
1a67a97c
SM		 3547 NewOp(1101, logop, 1, LOGOP);
3548 logop->op_type = OP_COND_EXPR;
3549 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3550 logop->op_first = first;
3551 logop->op_flags = flags | OPf_KIDS;
3552 logop->op_private = 1 | (flags >> 8);
3553 logop->op_other = LINKLIST(trueop);
3554 logop->op_next = LINKLIST(falseop);
79072805 3555
79072805
LW		 3556
3557 /* establish postfix order */
1a67a97c
SM		 3558 start = LINKLIST(first);
3559 first->op_next = (OP*)logop;
79072805 3560
b1cb66bf 3561 first->op_sibling = trueop;
3562 trueop->op_sibling = falseop;
1a67a97c 3563 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3564
1a67a97c 3565 trueop->op_next = falseop->op_next = o;
79072805 3566
1a67a97c 3567 o->op_next = start;
11343788 3568 return o;
79072805
LW		 3569}
3570
3571OP *
864dbfa3 3572Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3573{
b35b2403 3574 dTHR;
1a67a97c 3575 LOGOP *range;
79072805
LW		 3576 OP *flip;
3577 OP *flop;
1a67a97c 3578 OP *leftstart;
11343788 3579 OP *o;
79072805 3580
1a67a97c 3581 NewOp(1101, range, 1, LOGOP);
79072805 3582
1a67a97c
SM		 3583 range->op_type = OP_RANGE;
3584 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3585 range->op_first = left;
3586 range->op_flags = OPf_KIDS;
3587 leftstart = LINKLIST(left);
3588 range->op_other = LINKLIST(right);
3589 range->op_private = 1 | (flags >> 8);
79072805
LW		 3590
3591 left->op_sibling = right;
3592
1a67a97c
SM		 3593 range->op_next = (OP*)range;
3594 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3595 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3596 o = newUNOP(OP_NULL, 0, flop);
79072805 3597 linklist(flop);
1a67a97c 3598 range->op_next = leftstart;
79072805
LW		 3599
3600 left->op_next = flip;
3601 right->op_next = flop;
3602
1a67a97c
SM		 3603 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3604 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3605 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3606 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3607
3608 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3609 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3610
11343788 3611 flip->op_next = o;
79072805 3612 if (!flip->op_private || !flop->op_private)
11343788 3613 linklist(o); /* blow off optimizer unless constant */
79072805 3614
11343788 3615 return o;
79072805
LW		 3616}
3617
3618OP *
864dbfa3 3619Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3620{
11343788 3621 dTHR;
463ee0b2 3622 OP* listop;
11343788 3623 OP* o;
463ee0b2 3624 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3625 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3626
463ee0b2
LW		 3627 if (expr) {
3628 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3629 return block; /* do {} while 0 does once */
fb73857a 3630 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3631 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3632 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3633 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3634 } else if (expr->op_flags & OPf_KIDS) {
3635 OP *k1 = ((UNOP*)expr)->op_first;
3636 OP *k2 = (k1) ? k1->op_sibling : NULL;
3637 switch (expr->op_type) {
3638 case OP_NULL:
3639 if (k2 && k2->op_type == OP_READLINE
3640 && (k2->op_flags & OPf_STACKED)
3641 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3642 expr = newUNOP(OP_DEFINED, 0, expr);
3643 break;
3644
3645 case OP_SASSIGN:
3646 if (k1->op_type == OP_READDIR
3647 || k1->op_type == OP_GLOB
72b16652 3648 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3649 || k1->op_type == OP_EACH)
3650 expr = newUNOP(OP_DEFINED, 0, expr);
3651 break;
3652 }
774d564b 3653 }
463ee0b2 3654 }
93a17b20 3655
8990e307 3656 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3657 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3658
883ffac3
CS		 3659 if (listop)
3660 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3661
11343788
MB		 3662 if (once && o != listop)
3663 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3664
11343788
MB		 3665 if (o == listop)
3666 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3667
11343788
MB		 3668 o->op_flags |= flags;
3669 o = scope(o);
3670 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3671 return o;
79072805
LW		 3672}
3673
3674OP *
864dbfa3 3675Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3676{
11343788 3677 dTHR;
79072805
LW		 3678 OP *redo;
3679 OP *next = 0;
3680 OP *listop;
11343788 3681 OP *o;
79072805
LW		 3682 OP *condop;
3683
fb73857a 3684 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3685 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3686 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3687 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3688 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3689 OP *k1 = ((UNOP*)expr)->op_first;
3690 OP *k2 = (k1) ? k1->op_sibling : NULL;
3691 switch (expr->op_type) {
3692 case OP_NULL:
3693 if (k2 && k2->op_type == OP_READLINE
3694 && (k2->op_flags & OPf_STACKED)
3695 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3696 expr = newUNOP(OP_DEFINED, 0, expr);
3697 break;
3698
3699 case OP_SASSIGN:
3700 if (k1->op_type == OP_READDIR
3701 || k1->op_type == OP_GLOB
72b16652 3702 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3703 || k1->op_type == OP_EACH)
3704 expr = newUNOP(OP_DEFINED, 0, expr);
3705 break;
3706 }
748a9306 3707 }
79072805
LW		 3708
3709 if (!block)
3710 block = newOP(OP_NULL, 0);
3711
3712 if (cont)
3713 next = LINKLIST(cont);
fb73857a 3714 if (expr) {
79072805 3715 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3716 if ((line_t)whileline != NOLINE) {
3280af22 3717 PL_copline = whileline;
fb73857a 3718 cont = append_elem(OP_LINESEQ, cont,
3719 newSTATEOP(0, Nullch, Nullop));
3720 }
3721 }
79072805 3722
463ee0b2 3723 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3724 redo = LINKLIST(listop);
3725
3726 if (expr) {
3280af22 3727 PL_copline = whileline;
883ffac3
CS		 3728 scalar(listop);
3729 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3730 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3731 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3732 op_free((OP*)loop);
883ffac3 3733 return Nullop; /* listop already freed by new_logop */
463ee0b2 3734 }
883ffac3
CS		 3735 if (listop)
3736 ((LISTOP*)listop)->op_last->op_next = condop =
3737 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3738 if (!next)
3739 next = condop;
3740 }
3741 else
11343788 3742 o = listop;
79072805
LW		 3743
3744 if (!loop) {
b7dc083c 3745 NewOp(1101,loop,1,LOOP);
79072805 3746 loop->op_type = OP_ENTERLOOP;
22c35a8c 3747 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3748 loop->op_private = 0;
3749 loop->op_next = (OP*)loop;
3750 }
3751
11343788 3752 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3753
3754 loop->op_redoop = redo;
11343788 3755 loop->op_lastop = o;
79072805
LW		 3756
3757 if (next)
3758 loop->op_nextop = next;
3759 else
11343788 3760 loop->op_nextop = o;
79072805 3761
11343788
MB		 3762 o->op_flags |= flags;
3763 o->op_private |= (flags >> 8);
3764 return o;
79072805
LW		 3765}
3766
3767OP *
864dbfa3 3768Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3769{
3770 LOOP *loop;
b7dc083c 3771 LOOP *tmp;
fb73857a 3772 OP *wop;
85e6fe83 3773 int padoff = 0;
4633a7c4 3774 I32 iterflags = 0;
79072805 3775
79072805 3776 if (sv) {
85e6fe83 3777 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3778 sv->op_type = OP_RV2GV;
22c35a8c 3779 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3780 }
85e6fe83
LW		 3781 else if (sv->op_type == OP_PADSV) { /* private variable */
3782 padoff = sv->op_targ;
743e66e6 3783 sv->op_targ = 0;
85e6fe83
LW		 3784 op_free(sv);
3785 sv = Nullop;
3786 }
54b9620d
MB		 3787 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3788 padoff = sv->op_targ;
743e66e6 3789 sv->op_targ = 0;
54b9620d
MB		 3790 iterflags |= OPf_SPECIAL;
3791 op_free(sv);
3792 sv = Nullop;
3793 }
79072805 3794 else
cea2e8a9 3795 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3796 }
3797 else {
54b9620d
MB		 3798#ifdef USE_THREADS
3799 padoff = find_threadsv("_");
3800 iterflags |= OPf_SPECIAL;
3801#else
3280af22 3802 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3803#endif
79072805 3804 }
5f05dabc 3805 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3806 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3807 iterflags |= OPf_STACKED;
3808 }
89ea2908
GA		 3809 else if (expr->op_type == OP_NULL &&
3810 (expr->op_flags & OPf_KIDS) &&
3811 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3812 {
3813 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3814 * set the STACKED flag to indicate that these values are to be
3815 * treated as min/max values by 'pp_iterinit'.
3816 */
3817 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3818 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3819 OP* left = range->op_first;
3820 OP* right = left->op_sibling;
5152d7c7 3821 LISTOP* listop;
89ea2908
GA		 3822
3823 range->op_flags &= ~OPf_KIDS;
3824 range->op_first = Nullop;
3825
5152d7c7 3826 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3827 listop->op_first->op_next = range->op_next;
3828 left->op_next = range->op_other;
5152d7c7
GS		 3829 right->op_next = (OP*)listop;
3830 listop->op_next = listop->op_first;
89ea2908
GA		 3831
3832 op_free(expr);
5152d7c7 3833 expr = (OP*)(listop);
89ea2908
GA		 3834 null(expr);
3835 iterflags |= OPf_STACKED;
3836 }
3837 else {
3838 expr = mod(force_list(expr), OP_GREPSTART);
3839 }
3840
3841
4633a7c4 3842 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3843 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3844 assert(!loop->op_next);
b7dc083c
NIS		 3845#ifdef PL_OP_SLAB_ALLOC
3846 NewOp(1234,tmp,1,LOOP);
3847 Copy(loop,tmp,1,LOOP);
3848 loop = tmp;
3849#else
85e6fe83 3850 Renew(loop, 1, LOOP);
b7dc083c 3851#endif
85e6fe83 3852 loop->op_targ = padoff;
fb73857a 3853 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3854 PL_copline = forline;
fb73857a 3855 return newSTATEOP(0, label, wop);
79072805
LW		 3856}
3857
8990e307 3858OP*
864dbfa3 3859Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3860{
11343788
MB		 3861 dTHR;
3862 OP *o;
2d8e6c8d
GS		 3863 STRLEN n_a;
3864
8990e307 3865 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3866 /* "last()" means "last" */
3867 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3868 o = newOP(type, OPf_SPECIAL);
3869 else {
3870 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3871 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3872 : ""));
3873 }
8990e307
LW		 3874 op_free(label);
3875 }
3876 else {
a0d0e21e
LW		 3877 if (label->op_type == OP_ENTERSUB)
3878 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3879 o = newUNOP(type, OPf_STACKED, label);
8990e307 3880 }
3280af22 3881 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3882 return o;
8990e307
LW		 3883}
3884
79072805 3885void
864dbfa3 3886Perl_cv_undef(pTHX_ CV *cv)
79072805 3887{
11343788
MB		 3888 dTHR;
3889#ifdef USE_THREADS
e858de61
MB		 3890 if (CvMUTEXP(cv)) {
3891 MUTEX_DESTROY(CvMUTEXP(cv));
3892 Safefree(CvMUTEXP(cv));
3893 CvMUTEXP(cv) = 0;
3894 }
11343788
MB		 3895#endif /* USE_THREADS */
3896
a0d0e21e 3897 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3898#ifdef USE_THREADS
3899 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3900 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3901#else
a0d0e21e 3902 if (CvDEPTH(cv))
cea2e8a9 3903 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3904#endif /* USE_THREADS */
8990e307 3905 ENTER;
a0d0e21e 3906
7766f137 3907 SAVEVPTR(PL_curpad);
3280af22 3908 PL_curpad = 0;
a0d0e21e 3909
a5f75d66 3910 if (!CvCLONED(cv))
748a9306 3911 op_free(CvROOT(cv));
79072805 3912 CvROOT(cv) = Nullop;
8990e307 3913 LEAVE;
79072805 3914 }
1d5db326 3915 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3916 CvFLAGS(cv) = 0;
8e07c86e
AD		 3917 SvREFCNT_dec(CvGV(cv));
3918 CvGV(cv) = Nullgv;
3919 SvREFCNT_dec(CvOUTSIDE(cv));
3920 CvOUTSIDE(cv) = Nullcv;
3921 if (CvPADLIST(cv)) {
8ebc5c01 3922 /* may be during global destruction */
3923 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3924 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3925 while (i >= 0) {
3926 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3927 SV* sv = svp ? *svp : Nullsv;
3928 if (!sv)
3929 continue;
3280af22
NIS		 3930 if (sv == (SV*)PL_comppad_name)
3931 PL_comppad_name = Nullav;
3932 else if (sv == (SV*)PL_comppad) {
3933 PL_comppad = Nullav;
3934 PL_curpad = Null(SV**);
46fc3d4c 3935 }
3936 SvREFCNT_dec(sv);
8ebc5c01 3937 }
3938 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3939 }
8e07c86e
AD		 3940 CvPADLIST(cv) = Nullav;
3941 }
79072805
LW		 3942}
3943
76e3520e 3944STATIC void
743e66e6 3945S_cv_dump(pTHX_ CV *cv)
5f05dabc 3946{
62fde642 3947#ifdef DEBUGGING
5f05dabc 3948 CV *outside = CvOUTSIDE(cv);
3949 AV* padlist = CvPADLIST(cv);
4fdae800 3950 AV* pad_name;
3951 AV* pad;
3952 SV** pname;
3953 SV** ppad;
5f05dabc 3954 I32 ix;
3955
b900a521
JH		 3956 PerlIO_printf(Perl_debug_log,
3957 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
3958 PTR2UV(cv),
ab50184a 3959 (CvANON(cv) ? "ANON"
6b88bc9c 3960 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3961 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3962 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 3963 PTR2UV(outside),
ab50184a
CS		 3964 (!outside ? "null"
3965 : CvANON(outside) ? "ANON"
6b88bc9c 3966 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3967 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3968 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3969
4fdae800 3970 if (!padlist)
3971 return;
3972
3973 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3974 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3975 pname = AvARRAY(pad_name);
3976 ppad = AvARRAY(pad);
3977
93965878 3978 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3979 if (SvPOK(pname[ix]))
b900a521
JH		 3980 PerlIO_printf(Perl_debug_log,
3981 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
3982 ix, PTR2UV(ppad[ix]),
4fdae800 3983 SvFAKE(pname[ix]) ? "FAKE " : "",
3984 SvPVX(pname[ix]),
b900a521
JH		 3985 (IV)I_32(SvNVX(pname[ix])),
3986 SvIVX(pname[ix]));
5f05dabc 3987 }
743e66e6 3988#endif /* DEBUGGING */
62fde642 3989}
5f05dabc 3990
76e3520e 3991STATIC CV *
cea2e8a9 3992S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 3993{
11343788 3994 dTHR;
748a9306
LW		 3995 AV* av;
3996 I32 ix;
3997 AV* protopadlist = CvPADLIST(proto);
3998 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3999 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4000 SV** pname = AvARRAY(protopad_name);
4001 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4002 I32 fname = AvFILLp(protopad_name);
4003 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4004 AV* comppadlist;
4005 CV* cv;
4006
07055b4c
CS		 4007 assert(!CvUNIQUE(proto));
4008
748a9306 4009 ENTER;
7766f137 4010 SAVEVPTR(PL_curpad);
3280af22
NIS		 4011 SAVESPTR(PL_comppad);
4012 SAVESPTR(PL_comppad_name);
4013 SAVESPTR(PL_compcv);
748a9306 4014
3280af22 4015 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4016 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 4017 CvCLONED_on(cv);
5f05dabc 4018 if (CvANON(proto))
4019 CvANON_on(cv);
748a9306 4020
11343788 4021#ifdef USE_THREADS
12ca11f6 4022 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4023 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4024 CvOWNER(cv) = 0;
4025#endif /* USE_THREADS */
57843af0 4026 CvFILE(cv) = CvFILE(proto);
44a8e56a 4027 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4028 CvSTASH(cv) = CvSTASH(proto);
4029 CvROOT(cv) = CvROOT(proto);
4030 CvSTART(cv) = CvSTART(proto);
5f05dabc 4031 if (outside)
4032 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4033
68dc0745 4034 if (SvPOK(proto))
4035 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4036
3280af22 4037 PL_comppad_name = newAV();
46fc3d4c 4038 for (ix = fname; ix >= 0; ix--)
3280af22 4039 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4040
3280af22 4041 PL_comppad = newAV();
748a9306
LW		 4042
4043 comppadlist = newAV();
4044 AvREAL_off(comppadlist);
3280af22
NIS		 4045 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4046 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4047 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4048 av_fill(PL_comppad, AvFILLp(protopad));
4049 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4050
4051 av = newAV(); /* will be @_ */
4052 av_extend(av, 0);
3280af22 4053 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4054 AvFLAGS(av) = AVf_REIFY;
4055
9607fc9c 4056 for (ix = fpad; ix > 0; ix--) {
4057 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4058 if (namesv && namesv != &PL_sv_undef) {
aa689395 4059 char *name = SvPVX(namesv); /* XXX */
4060 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4061 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4062 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4063 if (!off)
3280af22 4064 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4065 else if (off != ix)
cea2e8a9 4066 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4067 }
4068 else { /* our own lexical */
aa689395 4069 SV* sv;
5f05dabc 4070 if (*name == '&') {
4071 /* anon code -- we'll come back for it */
4072 sv = SvREFCNT_inc(ppad[ix]);
4073 }
4074 else if (*name == '@')
4075 sv = (SV*)newAV();
748a9306 4076 else if (*name == '%')
5f05dabc 4077 sv = (SV*)newHV();
748a9306 4078 else
5f05dabc 4079 sv = NEWSV(0,0);
4080 if (!SvPADBUSY(sv))
4081 SvPADMY_on(sv);
3280af22 4082 PL_curpad[ix] = sv;
748a9306
LW		 4083 }
4084 }
7766f137 4085 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4086 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4087 }
748a9306 4088 else {
aa689395 4089 SV* sv = NEWSV(0,0);
748a9306 4090 SvPADTMP_on(sv);
3280af22 4091 PL_curpad[ix] = sv;
748a9306
LW		 4092 }
4093 }
4094
5f05dabc 4095 /* Now that vars are all in place, clone nested closures. */
4096
9607fc9c 4097 for (ix = fpad; ix > 0; ix--) {
4098 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4099 if (namesv
3280af22 4100 && namesv != &PL_sv_undef
aa689395 4101 && !(SvFLAGS(namesv) & SVf_FAKE)
4102 && *SvPVX(namesv) == '&'
5f05dabc 4103 && CvCLONE(ppad[ix]))
4104 {
4105 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4106 SvREFCNT_dec(ppad[ix]);
4107 CvCLONE_on(kid);
4108 SvPADMY_on(kid);
3280af22 4109 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4110 }
4111 }
4112
5f05dabc 4113#ifdef DEBUG_CLOSURES
ab50184a
CS		 4114 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4115 cv_dump(outside);
4116 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4117 cv_dump(proto);
ab50184a 4118 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4119 cv_dump(cv);
4120#endif
4121
748a9306
LW		 4122 LEAVE;
4123 return cv;
4124}
4125
4126CV *
864dbfa3 4127Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4128{
b099ddc0
GS		 4129 CV *cv;
4130 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
4131 cv = cv_clone2(proto, CvOUTSIDE(proto));
4132 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
4133 return cv;
5f05dabc 4134}
4135
3fe9a6f1 4136void
864dbfa3 4137Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4138{
0453d815
PM		 4139 dTHR;
4140
f248d071 4141 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 4142 SV* msg = sv_newmortal();
3fe9a6f1 4143 SV* name = Nullsv;
4144
4145 if (gv)
46fc3d4c 4146 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4147 sv_setpv(msg, "Prototype mismatch:");
4148 if (name)
cea2e8a9 4149 Perl_sv_catpvf(aTHX_ msg, " sub %_", name);
3fe9a6f1 4150 if (SvPOK(cv))
cea2e8a9 4151 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4152 sv_catpv(msg, " vs ");
4153 if (p)
cea2e8a9 4154 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4155 else
4156 sv_catpv(msg, "none");
0453d815 4157 Perl_warner(aTHX_ WARN_UNSAFE, "%_", msg);
3fe9a6f1 4158 }
4159}
4160
760ac839 4161SV *
864dbfa3 4162Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4163{
54310121 4164 if (!cv || !SvPOK(cv) || SvCUR(cv))
4165 return Nullsv;
fe5e78ed
GS		 4166 return op_const_sv(CvSTART(cv), cv);
4167}
760ac839 4168
fe5e78ed 4169SV *
864dbfa3 4170Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4171{
4172 SV *sv = Nullsv;
4173
4174 if(!o)
4175 return Nullsv;
4176
4177 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
4178 o = cLISTOPo->op_first->op_sibling;
4179
4180 for (; o; o = o->op_next) {
54310121 4181 OPCODE type = o->op_type;
fe5e78ed 4182
acb36ea4 4183 if (sv && o->op_next == o)
fe5e78ed 4184 return sv;
54310121 4185 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4186 continue;
4187 if (type == OP_LEAVESUB || type == OP_RETURN)
4188 break;
4189 if (sv)
4190 return Nullsv;
7766f137 4191 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4192 sv = cSVOPo->op_sv;
7766f137 4193 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4194 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4195 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4196 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4197 return Nullsv;
760ac839 4198 }
54310121 4199 else
4200 return Nullsv;
760ac839 4201 }
5aabfad6 4202 if (sv)
4203 SvREADONLY_on(sv);
760ac839
LW		 4204 return sv;
4205}
4206
09bef843
SB		 4207void
4208Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4209{
4210 if (o)
4211 SAVEFREEOP(o);
4212 if (proto)
4213 SAVEFREEOP(proto);
4214 if (attrs)
4215 SAVEFREEOP(attrs);
4216 if (block)
4217 SAVEFREEOP(block);
4218 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4219}
4220
748a9306 4221CV *
864dbfa3 4222Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4223{
09bef843
SB		 4224 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4225}
4226
4227CV *
4228Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4229{
11343788 4230 dTHR;
2d8e6c8d
GS		 4231 STRLEN n_a;
4232 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4 4233 GV *gv = gv_fetchpv(name ? name : "__ANON__",
09bef843
SB		 4234 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4235 SVt_PVCV);
2d8e6c8d 4236 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4237 register CV *cv=0;
a0d0e21e 4238 I32 ix;
79072805 4239
11343788 4240 if (o)
5dc0d613 4241 SAVEFREEOP(o);
3fe9a6f1 4242 if (proto)
4243 SAVEFREEOP(proto);
09bef843
SB		 4244 if (attrs)
4245 SAVEFREEOP(attrs);
3fe9a6f1 4246
09bef843 4247 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4248 maximum a prototype before. */
4249 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4250 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4251 && ckWARN_d(WARN_UNSAFE))
4252 {
0453d815 4253 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4254 }
55d729e4
GS		 4255 cv_ckproto((CV*)gv, NULL, ps);
4256 }
4257 if (ps)
4258 sv_setpv((SV*)gv, ps);
4259 else
4260 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4261 SvREFCNT_dec(PL_compcv);
4262 cv = PL_compcv = NULL;
4263 PL_sub_generation++;
55d729e4
GS		 4264 goto noblock;
4265 }
4266
68dc0745 4267 if (!name || GvCVGEN(gv))
4268 cv = Nullcv;
4269 else if (cv = GvCV(gv)) {
3fe9a6f1 4270 cv_ckproto(cv, gv, ps);
68dc0745 4271 /* already defined (or promised)? */
4272 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4273 SV* const_sv;
fe5e78ed 4274 bool const_changed = TRUE;
09bef843 4275 if (!block && !attrs) {
aa689395 4276 /* just a "sub foo;" when &foo is already defined */
3280af22 4277 SAVEFREESV(PL_compcv);
aa689395 4278 goto done;
4279 }
7bac28a0 4280 /* ahem, death to those who redefine active sort subs */
3280af22 4281 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4282 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4283 if (!block)
4284 goto withattrs;
fe5e78ed
GS		 4285 if(const_sv = cv_const_sv(cv))
4286 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4287 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4288 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4289 && HvNAME(GvSTASH(CvGV(cv)))
4290 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
4291 "autouse"))) {
57843af0
GS		 4292 line_t oldline = CopLINE(PL_curcop);
4293 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4294 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4295 const_sv ? "Constant subroutine %s redefined"
09bef843 4296 : "Subroutine %s redefined", name);
57843af0 4297 CopLINE_set(PL_curcop, oldline);
79072805 4298 }
8990e307 4299 SvREFCNT_dec(cv);
68dc0745 4300 cv = Nullcv;
79072805
LW		 4301 }
4302 }
09bef843
SB		 4303 withattrs:
4304 if (attrs) {
4305 HV *stash;
4306 SV *rcv;
4307
4308 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4309 * before we clobber PL_compcv.
4310 */
4311 if (cv && !block) {
4312 rcv = (SV*)cv;
4313 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4314 stash = GvSTASH(CvGV(cv));
4315 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4316 stash = CvSTASH(cv);
4317 else
4318 stash = PL_curstash;
4319 }
4320 else {
4321 /* possibly about to re-define existing subr -- ignore old cv */
4322 rcv = (SV*)PL_compcv;
4323 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4324 stash = GvSTASH(gv);
4325 else
4326 stash = PL_curstash;
4327 }
4328 apply_attrs(stash, rcv, attrs);
4329 }
a0d0e21e 4330 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4331 if (!block) {
4332 /* got here with just attrs -- work done, so bug out */
4333 SAVEFREESV(PL_compcv);
4334 goto done;
4335 }
4633a7c4 4336 cv_undef(cv);
3280af22
NIS		 4337 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4338 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4339 CvOUTSIDE(PL_compcv) = 0;
4340 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4341 CvPADLIST(PL_compcv) = 0;
4342 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4343 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4344 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4345 }
4346 else {
3280af22 4347 cv = PL_compcv;
44a8e56a 4348 if (name) {
4349 GvCV(gv) = cv;
4350 GvCVGEN(gv) = 0;
3280af22 4351 PL_sub_generation++;
44a8e56a 4352 }
a0d0e21e 4353 }
44a8e56a 4354 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4355 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4356 CvSTASH(cv) = PL_curstash;
11343788
MB		 4357#ifdef USE_THREADS
4358 CvOWNER(cv) = 0;
1cfa4ec7 4359 if (!CvMUTEXP(cv)) {
f6aaf501 4360 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4361 MUTEX_INIT(CvMUTEXP(cv));
4362 }
11343788 4363#endif /* USE_THREADS */
8990e307 4364
3fe9a6f1 4365 if (ps)
4366 sv_setpv((SV*)cv, ps);
4633a7c4 4367
3280af22 4368 if (PL_error_count) {
c07a80fd 4369 op_free(block);
4370 block = Nullop;
68dc0745 4371 if (name) {
4372 char *s = strrchr(name, ':');
4373 s = s ? s+1 : name;
6d4c2119
CS		 4374 if (strEQ(s, "BEGIN")) {
4375 char *not_safe =
4376 "BEGIN not safe after errors--compilation aborted";
faef0170 4377 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4378 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4379 else {
4380 /* force display of errors found but not reported */
38a03e6e 4381 sv_catpv(ERRSV, not_safe);
cea2e8a9 4382 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4383 }
4384 }
68dc0745 4385 }
c07a80fd 4386 }
a0d0e21e 4387 if (!block) {
55d729e4 4388 noblock:
3280af22 4389 PL_copline = NOLINE;
a0d0e21e
LW		 4390 LEAVE_SCOPE(floor);
4391 return cv;
4392 }
4393
3280af22
NIS		 4394 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4395 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4396
7766f137
GS		 4397 if (CvLVALUE(cv)) {
4398 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4399 }
4400 else {
4401 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4402 }
4403 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4404 OpREFCNT_set(CvROOT(cv), 1);
4405 CvSTART(cv) = LINKLIST(CvROOT(cv));
4406 CvROOT(cv)->op_next = 0;
4407 peep(CvSTART(cv));
4408
4409 /* now that optimizer has done its work, adjust pad values */
54310121 4410 if (CvCLONE(cv)) {
3280af22
NIS		 4411 SV **namep = AvARRAY(PL_comppad_name);
4412 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4413 SV *namesv;
4414
7766f137 4415 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4416 continue;
4417 /*
4418 * The only things that a clonable function needs in its
4419 * pad are references to outer lexicals and anonymous subs.
4420 * The rest are created anew during cloning.
4421 */
4422 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4423 namesv != &PL_sv_undef &&
54310121 4424 (SvFAKE(namesv) ||
4425 *SvPVX(namesv) == '&')))
4426 {
3280af22
NIS		 4427 SvREFCNT_dec(PL_curpad[ix]);
4428 PL_curpad[ix] = Nullsv;
54310121 4429 }
4430 }
a0d0e21e 4431 }
54310121 4432 else {
4433 AV *av = newAV(); /* Will be @_ */
4434 av_extend(av, 0);
3280af22 4435 av_store(PL_comppad, 0, (SV*)av);
54310121 4436 AvFLAGS(av) = AVf_REIFY;
79072805 4437
3280af22 4438 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4439 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4440 continue;
3280af22
NIS		 4441 if (!SvPADMY(PL_curpad[ix]))
4442 SvPADTMP_on(PL_curpad[ix]);
54310121 4443 }
4444 }
79072805 4445
44a8e56a 4446 if (name) {
4447 char *s;
4448
3280af22 4449 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4450 SV *sv = NEWSV(0,0);
44a8e56a 4451 SV *tmpstr = sv_newmortal();
549bb64a 4452 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4453 CV *cv;
4454 HV *hv;
4455
ed094faf
GS		 4456 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4457 CopFILE(PL_curcop),
cc49e20b 4458 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4459 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4460 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4461 hv = GvHVn(db_postponed);
9607fc9c 4462 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4463 && (cv = GvCV(db_postponed))) {
44a8e56a 4464 dSP;
924508f0 4465 PUSHMARK(SP);
44a8e56a 4466 XPUSHs(tmpstr);
4467 PUTBACK;
864dbfa3 4468 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4469 }
4470 }
79072805 4471
44a8e56a 4472 if ((s = strrchr(name,':')))
28757baa 4473 s++;
4474 else
4475 s = name;
ed094faf
GS		 4476
4477 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4478 goto done;
4479
68dc0745 4480 if (strEQ(s, "BEGIN")) {
3280af22 4481 I32 oldscope = PL_scopestack_ix;
28757baa 4482 ENTER;
57843af0
GS		 4483 SAVECOPFILE(&PL_compiling);
4484 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4485 save_svref(&PL_rs);
4486 sv_setsv(PL_rs, PL_nrs);
28757baa 4487
3280af22
NIS		 4488 if (!PL_beginav)
4489 PL_beginav = newAV();
28757baa 4490 DEBUG_x( dump_sub(gv) );
ed094faf 4491 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4492 GvCV(gv) = 0;
3280af22 4493 call_list(oldscope, PL_beginav);
a6006777 4494
3280af22 4495 PL_curcop = &PL_compiling;
a0ed51b3 4496 PL_compiling.op_private = PL_hints;
28757baa 4497 LEAVE;
4498 }
3280af22
NIS		 4499 else if (strEQ(s, "END") && !PL_error_count) {
4500 if (!PL_endav)
4501 PL_endav = newAV();
ed094faf 4502 DEBUG_x( dump_sub(gv) );
3280af22 4503 av_unshift(PL_endav, 1);
ed094faf 4504 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4505 GvCV(gv) = 0;
4506 }
4f25aa18
GS		 4507 else if (strEQ(s, "STOP") && !PL_error_count) {
4508 if (!PL_stopav)
4509 PL_stopav = newAV();
ed094faf 4510 DEBUG_x( dump_sub(gv) );
4f25aa18 4511 av_unshift(PL_stopav, 1);
ed094faf 4512 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4513 GvCV(gv) = 0;
4514 }
3280af22
NIS		 4515 else if (strEQ(s, "INIT") && !PL_error_count) {
4516 if (!PL_initav)
4517 PL_initav = newAV();
ed094faf 4518 DEBUG_x( dump_sub(gv) );
3280af22 4519 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4520 GvCV(gv) = 0;
ae77835f 4521 }
79072805 4522 }
a6006777 4523
aa689395 4524 done:
3280af22 4525 PL_copline = NOLINE;
8990e307 4526 LEAVE_SCOPE(floor);
a0d0e21e 4527 return cv;
79072805
LW		 4528}
4529
b099ddc0 4530/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4531void
864dbfa3 4532Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4533{
4534 dTHR;
5476c433 4535
11faa288
GS		 4536 ENTER;
4537 SAVECOPLINE(PL_curcop);
4538 SAVEHINTS();
4539
4540 CopLINE_set(PL_curcop, PL_copline);
3280af22 4541 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4542
4543 if (stash) {
4544 SAVESPTR(PL_curstash);
4545 SAVECOPSTASH(PL_curcop);
4546 PL_curstash = stash;
4547#ifdef USE_ITHREADS
4548 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4549#else
4550 CopSTASH(PL_curcop) = stash;
4551#endif
4552 }
5476c433 4553
09bef843 4554 newATTRSUB(
be24f278 4555 start_subparse(FALSE, 0),
5476c433 4556 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4557 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4558 Nullop,
5476c433
JD		 4559 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4560 );
4561
11faa288 4562 LEAVE;
5476c433
JD		 4563}
4564
57d3b86d 4565CV *
864dbfa3 4566Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4567{
11343788 4568 dTHR;
44a8e56a 4569 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4570 register CV *cv;
44a8e56a 4571
4572 if (cv = (name ? GvCV(gv) : Nullcv)) {
4573 if (GvCVGEN(gv)) {
4574 /* just a cached method */
4575 SvREFCNT_dec(cv);
4576 cv = 0;
4577 }
4578 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4579 /* already defined (or promised) */
599cee73 4580 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4581 && HvNAME(GvSTASH(CvGV(cv)))
4582 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4583 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4584 if (PL_copline != NOLINE)
57843af0 4585 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4586 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4587 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4588 }
4589 SvREFCNT_dec(cv);
4590 cv = 0;
79072805 4591 }
79072805 4592 }
44a8e56a 4593
4594 if (cv) /* must reuse cv if autoloaded */
4595 cv_undef(cv);
a0d0e21e
LW		 4596 else {
4597 cv = (CV*)NEWSV(1105,0);
4598 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4599 if (name) {
4600 GvCV(gv) = cv;
4601 GvCVGEN(gv) = 0;
3280af22 4602 PL_sub_generation++;
44a8e56a 4603 }
a0d0e21e 4604 }
5196be3e 4605 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4606#ifdef USE_THREADS
12ca11f6 4607 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4608 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4609 CvOWNER(cv) = 0;
4610#endif /* USE_THREADS */
b195d487 4611 (void)gv_fetchfile(filename);
57843af0
GS		 4612 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4613 an external constant string */
a0d0e21e 4614 CvXSUB(cv) = subaddr;
44a8e56a 4615
28757baa 4616 if (name) {
4617 char *s = strrchr(name,':');
4618 if (s)
4619 s++;
4620 else
4621 s = name;
ed094faf
GS		 4622
4623 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4624 goto done;
4625
28757baa 4626 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4627 if (!PL_beginav)
4628 PL_beginav = newAV();
ed094faf 4629 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4630 GvCV(gv) = 0;
28757baa 4631 }
4632 else if (strEQ(s, "END")) {
3280af22
NIS		 4633 if (!PL_endav)
4634 PL_endav = newAV();
4635 av_unshift(PL_endav, 1);
ed094faf 4636 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4637 GvCV(gv) = 0;
28757baa 4638 }
4f25aa18
GS		 4639 else if (strEQ(s, "STOP")) {
4640 if (!PL_stopav)
4641 PL_stopav = newAV();
4642 av_unshift(PL_stopav, 1);
ed094faf 4643 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4644 GvCV(gv) = 0;
4645 }
7d07dbc2 4646 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4647 if (!PL_initav)
4648 PL_initav = newAV();
ed094faf 4649 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4650 GvCV(gv) = 0;
ae77835f 4651 }
28757baa 4652 }
8990e307 4653 else
a5f75d66 4654 CvANON_on(cv);
44a8e56a 4655
ed094faf 4656done:
a0d0e21e 4657 return cv;
79072805
LW		 4658}
4659
4660void
864dbfa3 4661Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4662{
11343788 4663 dTHR;
79072805
LW		 4664 register CV *cv;
4665 char *name;
4666 GV *gv;
a0d0e21e 4667 I32 ix;
2d8e6c8d 4668 STRLEN n_a;
79072805 4669
11343788 4670 if (o)
2d8e6c8d 4671 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4672 else
4673 name = "STDOUT";
85e6fe83 4674 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4675 GvMULTI_on(gv);
79072805 4676 if (cv = GvFORM(gv)) {
599cee73 4677 if (ckWARN(WARN_REDEFINE)) {
57843af0 4678 line_t oldline = CopLINE(PL_curcop);
79072805 4679
57843af0 4680 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4681 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4682 CopLINE_set(PL_curcop, oldline);
79072805 4683 }
8990e307 4684 SvREFCNT_dec(cv);
79072805 4685 }
3280af22 4686 cv = PL_compcv;
79072805 4687 GvFORM(gv) = cv;
44a8e56a 4688 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4689 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4690
3280af22
NIS		 4691 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4692 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4693 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4694 }
4695
79072805 4696 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4697 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4698 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4699 CvSTART(cv) = LINKLIST(CvROOT(cv));
4700 CvROOT(cv)->op_next = 0;
4701 peep(CvSTART(cv));
11343788 4702 op_free(o);
3280af22 4703 PL_copline = NOLINE;
8990e307 4704 LEAVE_SCOPE(floor);
79072805
LW		 4705}
4706
4707OP *
864dbfa3 4708Perl_newANONLIST(pTHX_ OP *o)
79072805 4709{
93a17b20 4710 return newUNOP(OP_REFGEN, 0,
11343788 4711 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4712}
4713
4714OP *
864dbfa3 4715Perl_newANONHASH(pTHX_ OP *o)
79072805 4716{
93a17b20 4717 return newUNOP(OP_REFGEN, 0,
11343788 4718 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4719}
4720
4721OP *
864dbfa3 4722Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4723{
09bef843
SB		 4724 return newANONATTRSUB(floor, proto, Nullop, block);
4725}
4726
4727OP *
4728Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4729{
a0d0e21e 4730 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4731 newSVOP(OP_ANONCODE, 0,
4732 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4733}
4734
4735OP *
864dbfa3 4736Perl_oopsAV(pTHX_ OP *o)
79072805 4737{
ed6116ce
LW		 4738 switch (o->op_type) {
4739 case OP_PADSV:
4740 o->op_type = OP_PADAV;
22c35a8c 4741 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4742 return ref(o, OP_RV2AV);
ed6116ce
LW		 4743
4744 case OP_RV2SV:
79072805 4745 o->op_type = OP_RV2AV;
22c35a8c 4746 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4747 ref(o, OP_RV2AV);
ed6116ce
LW		 4748 break;
4749
4750 default:
0453d815
PM		 4751 if (ckWARN_d(WARN_INTERNAL))
4752 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4753 break;
4754 }
79072805
LW		 4755 return o;
4756}
4757
4758OP *
864dbfa3 4759Perl_oopsHV(pTHX_ OP *o)
79072805 4760{
0453d815 4761 dTHR;
0453d815 4762
ed6116ce
LW		 4763 switch (o->op_type) {
4764 case OP_PADSV:
4765 case OP_PADAV:
4766 o->op_type = OP_PADHV;
22c35a8c 4767 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4768 return ref(o, OP_RV2HV);
ed6116ce
LW		 4769
4770 case OP_RV2SV:
4771 case OP_RV2AV:
79072805 4772 o->op_type = OP_RV2HV;
22c35a8c 4773 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4774 ref(o, OP_RV2HV);
ed6116ce
LW		 4775 break;
4776
4777 default:
0453d815
PM		 4778 if (ckWARN_d(WARN_INTERNAL))
4779 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4780 break;
4781 }
79072805
LW		 4782 return o;
4783}
4784
4785OP *
864dbfa3 4786Perl_newAVREF(pTHX_ OP *o)
79072805 4787{
ed6116ce
LW		 4788 if (o->op_type == OP_PADANY) {
4789 o->op_type = OP_PADAV;
22c35a8c 4790 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4791 return o;
ed6116ce 4792 }
79072805
LW		 4793 return newUNOP(OP_RV2AV, 0, scalar(o));
4794}
4795
4796OP *
864dbfa3 4797Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4798{
82092f1d 4799 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4800 return newUNOP(OP_NULL, 0, o);
748a9306 4801 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4802}
4803
4804OP *
864dbfa3 4805Perl_newHVREF(pTHX_ OP *o)
79072805 4806{
ed6116ce
LW		 4807 if (o->op_type == OP_PADANY) {
4808 o->op_type = OP_PADHV;
22c35a8c 4809 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4810 return o;
ed6116ce 4811 }
79072805
LW		 4812 return newUNOP(OP_RV2HV, 0, scalar(o));
4813}
4814
4815OP *
864dbfa3 4816Perl_oopsCV(pTHX_ OP *o)
79072805 4817{
cea2e8a9 4818 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4819 /* STUB */
4820 return o;
4821}
4822
4823OP *
864dbfa3 4824Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4825{
c07a80fd 4826 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4827}
4828
4829OP *
864dbfa3 4830Perl_newSVREF(pTHX_ OP *o)
79072805 4831{
ed6116ce
LW		 4832 if (o->op_type == OP_PADANY) {
4833 o->op_type = OP_PADSV;
22c35a8c 4834 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4835 return o;
ed6116ce 4836 }
224a4551
MB		 4837 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4838 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4839 return o;
224a4551 4840 }
79072805
LW		 4841 return newUNOP(OP_RV2SV, 0, scalar(o));
4842}
4843
4844/* Check routines. */
4845
4846OP *
cea2e8a9 4847Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4848{
178c6305
CS		 4849 PADOFFSET ix;
4850 SV* name;
4851
4852 name = NEWSV(1106,0);
4853 sv_upgrade(name, SVt_PVNV);
4854 sv_setpvn(name, "&", 1);
4855 SvIVX(name) = -1;
4856 SvNVX(name) = 1;
5dc0d613 4857 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4858 av_store(PL_comppad_name, ix, name);
4859 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4860 SvPADMY_on(cSVOPo->op_sv);
4861 cSVOPo->op_sv = Nullsv;
4862 cSVOPo->op_targ = ix;
4863 return o;
5f05dabc 4864}
4865
4866OP *
cea2e8a9 4867Perl_ck_bitop(pTHX_ OP *o)
55497cff 4868{
3280af22 4869 o->op_private = PL_hints;
5dc0d613 4870 return o;
55497cff 4871}
4872
4873OP *
cea2e8a9 4874Perl_ck_concat(pTHX_ OP *o)
79072805 4875{
11343788
MB		 4876 if (cUNOPo->op_first->op_type == OP_CONCAT)
4877 o->op_flags |= OPf_STACKED;
4878 return o;
79072805
LW		 4879}
4880
4881OP *
cea2e8a9 4882Perl_ck_spair(pTHX_ OP *o)
79072805 4883{
11343788 4884 if (o->op_flags & OPf_KIDS) {
79072805 4885 OP* newop;
a0d0e21e 4886 OP* kid;
5dc0d613
MB		 4887 OPCODE type = o->op_type;
4888 o = modkids(ck_fun(o), type);
11343788 4889 kid = cUNOPo->op_first;
a0d0e21e
LW		 4890 newop = kUNOP->op_first->op_sibling;
4891 if (newop &&
4892 (newop->op_sibling ||
22c35a8c 4893 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4894 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4895 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4896
11343788 4897 return o;
a0d0e21e
LW		 4898 }
4899 op_free(kUNOP->op_first);
4900 kUNOP->op_first = newop;
4901 }
22c35a8c 4902 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4903 return ck_fun(o);
a0d0e21e
LW		 4904}
4905
4906OP *
cea2e8a9 4907Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4908{
11343788 4909 o = ck_fun(o);
5dc0d613 4910 o->op_private = 0;
11343788
MB		 4911 if (o->op_flags & OPf_KIDS) {
4912 OP *kid = cUNOPo->op_first;
5f05dabc 4913 if (kid->op_type == OP_HSLICE)
5dc0d613 4914 o->op_private |= OPpSLICE;
5f05dabc 4915 else if (kid->op_type != OP_HELEM)
cea2e8a9 4916 Perl_croak(aTHX_ "%s argument is not a HASH element or slice",
22c35a8c 4917 PL_op_desc[o->op_type]);
a0d0e21e 4918 null(kid);
79072805 4919 }
11343788 4920 return o;
79072805
LW		 4921}
4922
4923OP *
cea2e8a9 4924Perl_ck_eof(pTHX_ OP *o)
79072805 4925{
11343788 4926 I32 type = o->op_type;
79072805 4927
11343788
MB		 4928 if (o->op_flags & OPf_KIDS) {
4929 if (cLISTOPo->op_first->op_type == OP_STUB) {
4930 op_free(o);
4931 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4932 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4933 }
11343788 4934 return ck_fun(o);
79072805 4935 }
11343788 4936 return o;
79072805
LW		 4937}
4938
4939OP *
cea2e8a9 4940Perl_ck_eval(pTHX_ OP *o)
79072805 4941{
3280af22 4942 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4943 if (o->op_flags & OPf_KIDS) {
4944 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4945
93a17b20 4946 if (!kid) {
11343788
MB		 4947 o->op_flags &= ~OPf_KIDS;
4948 null(o);
79072805
LW		 4949 }
4950 else if (kid->op_type == OP_LINESEQ) {
4951 LOGOP *enter;
4952
11343788
MB		 4953 kid->op_next = o->op_next;
4954 cUNOPo->op_first = 0;
4955 op_free(o);
79072805 4956
b7dc083c 4957 NewOp(1101, enter, 1, LOGOP);
79072805 4958 enter->op_type = OP_ENTERTRY;
22c35a8c 4959 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4960 enter->op_private = 0;
4961
4962 /* establish postfix order */
4963 enter->op_next = (OP*)enter;
4964
11343788
MB		 4965 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4966 o->op_type = OP_LEAVETRY;
22c35a8c 4967 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4968 enter->op_other = o;
4969 return o;
79072805 4970 }
c7cc6f1c 4971 else
473986ff 4972 scalar((OP*)kid);
79072805
LW		 4973 }
4974 else {
11343788 4975 op_free(o);
54b9620d 4976 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4977 }
3280af22 4978 o->op_targ = (PADOFFSET)PL_hints;
11343788 4979 return o;
79072805
LW		 4980}
4981
4982OP *
cea2e8a9 4983Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 4984{
4985 OP *kid;
11343788
MB		 4986 if (o->op_flags & OPf_STACKED) {
4987 o = ck_fun(o);
4988 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4989 if (kid->op_type == OP_RV2GV)
4990 null(kid);
79072805 4991 }
463ee0b2 4992 else
11343788
MB		 4993 o = listkids(o);
4994 return o;
79072805
LW		 4995}
4996
4997OP *
cea2e8a9 4998Perl_ck_exists(pTHX_ OP *o)
5f05dabc 4999{
5196be3e
MB		 5000 o = ck_fun(o);
5001 if (o->op_flags & OPf_KIDS) {
5002 OP *kid = cUNOPo->op_first;
5f05dabc 5003 if (kid->op_type != OP_HELEM)
cea2e8a9 5004 Perl_croak(aTHX_ "%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 5005 null(kid);
5006 }
5196be3e 5007 return o;
5f05dabc 5008}
5009
22c35a8c 5010#if 0
5f05dabc 5011OP *
cea2e8a9 5012Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5013{
5014 o = fold_constants(o);
5015 if (o->op_type == OP_CONST)
5016 o->op_type = OP_GV;
5017 return o;
5018}
22c35a8c 5019#endif
79072805
LW		 5020
5021OP *
cea2e8a9 5022Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5023{
11343788
MB		 5024 dTHR;
5025 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5026
3280af22 5027 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5028 if (kid->op_type == OP_CONST) {
44a8e56a 5029 char *name;
5030 int iscv;
5031 GV *gv;
779c5bc9 5032 SV *kidsv = kid->op_sv;
2d8e6c8d 5033 STRLEN n_a;
44a8e56a 5034
779c5bc9
GS		 5035 /* Is it a constant from cv_const_sv()? */
5036 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5037 SV *rsv = SvRV(kidsv);
5038 int svtype = SvTYPE(rsv);
5039 char *badtype = Nullch;
5040
5041 switch (o->op_type) {
5042 case OP_RV2SV:
5043 if (svtype > SVt_PVMG)
5044 badtype = "a SCALAR";
5045 break;
5046 case OP_RV2AV:
5047 if (svtype != SVt_PVAV)
5048 badtype = "an ARRAY";
5049 break;
5050 case OP_RV2HV:
5051 if (svtype != SVt_PVHV) {
5052 if (svtype == SVt_PVAV) { /* pseudohash? */
5053 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5054 if (ksv && SvROK(*ksv)
5055 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5056 {
5057 break;
5058 }
5059 }
5060 badtype = "a HASH";
5061 }
5062 break;
5063 case OP_RV2CV:
5064 if (svtype != SVt_PVCV)
5065 badtype = "a CODE";
5066 break;
5067 }
5068 if (badtype)
cea2e8a9 5069 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5070 return o;
5071 }
2d8e6c8d 5072 name = SvPV(kidsv, n_a);
3280af22 5073 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5074 char *badthing = Nullch;
5dc0d613 5075 switch (o->op_type) {
44a8e56a 5076 case OP_RV2SV:
5077 badthing = "a SCALAR";
5078 break;
5079 case OP_RV2AV:
5080 badthing = "an ARRAY";
5081 break;
5082 case OP_RV2HV:
5083 badthing = "a HASH";
5084 break;
5085 }
5086 if (badthing)
cea2e8a9 5087 Perl_croak(aTHX_
44a8e56a 5088 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5089 name, badthing);
5090 }
93233ece
CS		 5091 /*
5092 * This is a little tricky. We only want to add the symbol if we
5093 * didn't add it in the lexer. Otherwise we get duplicate strict
5094 * warnings. But if we didn't add it in the lexer, we must at
5095 * least pretend like we wanted to add it even if it existed before,
5096 * or we get possible typo warnings. OPpCONST_ENTERED says
5097 * whether the lexer already added THIS instance of this symbol.
5098 */
5196be3e 5099 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5100 do {
44a8e56a 5101 gv = gv_fetchpv(name,
748a9306 5102 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5103 iscv
5104 ? SVt_PVCV
11343788 5105 : o->op_type == OP_RV2SV
a0d0e21e 5106 ? SVt_PV
11343788 5107 : o->op_type == OP_RV2AV
a0d0e21e 5108 ? SVt_PVAV
11343788 5109 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5110 ? SVt_PVHV
5111 : SVt_PVGV);
93233ece
CS		 5112 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5113 if (gv) {
5114 kid->op_type = OP_GV;
5115 SvREFCNT_dec(kid->op_sv);
350de78d 5116#ifdef USE_ITHREADS
638eceb6 5117 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5118 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5119 GvIN_PAD_on(gv);
350de78d
GS		 5120 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5121#else
93233ece 5122 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5123#endif
76cd736e 5124 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5125 }
79072805 5126 }
11343788 5127 return o;
79072805
LW		 5128}
5129
5130OP *
cea2e8a9 5131Perl_ck_ftst(pTHX_ OP *o)
79072805 5132{
11343788
MB		 5133 dTHR;
5134 I32 type = o->op_type;
79072805 5135
d0dca557
JD		 5136 if (o->op_flags & OPf_REF) {
5137 /* nothing */
5138 }
5139 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5140 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5141
5142 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5143 STRLEN n_a;
a0d0e21e 5144 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5145 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5146 op_free(o);
d0dca557 5147 o = newop;
79072805
LW		 5148 }
5149 }
5150 else {
11343788 5151 op_free(o);
79072805 5152 if (type == OP_FTTTY)
d0dca557 5153 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5154 SVt_PVIO));
79072805 5155 else
d0dca557 5156 o = newUNOP(type, 0, newDEFSVOP());
79072805 5157 }
d0dca557
JD		 5158#ifdef USE_LOCALE
5159 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5160 o->op_private = 0;
5161 if (PL_hints & HINT_LOCALE)
5162 o->op_private |= OPpLOCALE;
5163 }
5164#endif
11343788 5165 return o;
79072805
LW		 5166}
5167
5168OP *
cea2e8a9 5169Perl_ck_fun(pTHX_ OP *o)
79072805 5170{
11343788 5171 dTHR;
79072805
LW		 5172 register OP *kid;
5173 OP **tokid;
5174 OP *sibl;
5175 I32 numargs = 0;
11343788 5176 int type = o->op_type;
22c35a8c 5177 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5178
11343788 5179 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5180 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5181 oa &= ~OA_OPTIONAL;
5182 else
11343788 5183 return no_fh_allowed(o);
79072805
LW		 5184 }
5185
11343788 5186 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5187 STRLEN n_a;
11343788
MB		 5188 tokid = &cLISTOPo->op_first;
5189 kid = cLISTOPo->op_first;
8990e307
LW		 5190 if (kid->op_type == OP_PUSHMARK ||
5191 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
5192 {
79072805
LW		 5193 tokid = &kid->op_sibling;
5194 kid = kid->op_sibling;
5195 }
22c35a8c 5196 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5197 *tokid = kid = newDEFSVOP();
79072805
LW		 5198
5199 while (oa && kid) {
5200 numargs++;
5201 sibl = kid->op_sibling;
5202 switch (oa & 7) {
5203 case OA_SCALAR:
62c18ce2
GS		 5204 /* list seen where single (scalar) arg expected? */
5205 if (numargs == 1 && !(oa >> 4)
5206 && kid->op_type == OP_LIST && type != OP_SCALAR)
5207 {
5208 return too_many_arguments(o,PL_op_desc[type]);
5209 }
79072805
LW		 5210 scalar(kid);
5211 break;
5212 case OA_LIST:
5213 if (oa < 16) {
5214 kid = 0;
5215 continue;
5216 }
5217 else
5218 list(kid);
5219 break;
5220 case OA_AVREF:
5221 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5222 (kid->op_private & OPpCONST_BARE))
5223 {
2d8e6c8d 5224 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5225 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5226 gv_fetchpv(name, TRUE, SVt_PVAV) ));
b9c39e73 5227 if (ckWARN(WARN_SYNTAX))
cf2093f6 5228 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5229 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5230 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5231 op_free(kid);
5232 kid = newop;
5233 kid->op_sibling = sibl;
5234 *tokid = kid;
5235 }
8990e307 5236 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5237 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5238 mod(kid, type);
79072805
LW		 5239 break;
5240 case OA_HVREF:
5241 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5242 (kid->op_private & OPpCONST_BARE))
5243 {
2d8e6c8d 5244 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5245 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5246 gv_fetchpv(name, TRUE, SVt_PVHV) ));
b9c39e73 5247 if (ckWARN(WARN_SYNTAX))
cf2093f6 5248 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5249 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5250 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5251 op_free(kid);
5252 kid = newop;
5253 kid->op_sibling = sibl;
5254 *tokid = kid;
5255 }
8990e307 5256 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5257 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5258 mod(kid, type);
79072805
LW		 5259 break;
5260 case OA_CVREF:
5261 {
a0d0e21e 5262 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5263 kid->op_sibling = 0;
5264 linklist(kid);
5265 newop->op_next = newop;
5266 kid = newop;
5267 kid->op_sibling = sibl;
5268 *tokid = kid;
5269 }
5270 break;
5271 case OA_FILEREF:
c340be78 5272 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5273 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5274 (kid->op_private & OPpCONST_BARE))
5275 {
79072805 5276 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5277 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5278 SVt_PVIO) );
79072805
LW		 5279 op_free(kid);
5280 kid = newop;
5281 }
1ea32a52
GS		 5282 else if (kid->op_type == OP_READLINE) {
5283 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5284 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5285 }
79072805 5286 else {
35cd451c 5287 I32 flags = OPf_SPECIAL;
a6c40364 5288 I32 priv = 0;
35cd451c 5289 /* is this op a FH constructor? */
853846ea 5290 if (is_handle_constructor(o,numargs)) {
1d8d4d2a 5291 flags = 0;
853846ea
NIS		 5292 /* Set a flag to tell rv2gv to vivify
5293 * need to "prove" flag does not mean something
5294 * else already - NI-S 1999/05/07
5295 */
a6c40364 5296 priv = OPpDEREF;
1d8d4d2a
NIS		 5297#if 0
5298 /* Helps with open($array[$n],...)
5299 but is too simplistic - need to do selectively
5300 */
5301 mod(kid,type);
5302#endif
853846ea 5303 }
79072805 5304 kid->op_sibling = 0;
35cd451c 5305 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
a6c40364
GS		 5306 if (priv) {
5307 kid->op_private |= priv;
1d8d4d2a 5308 }
79072805
LW		 5309 }
5310 kid->op_sibling = sibl;
5311 *tokid = kid;
5312 }
5313 scalar(kid);
5314 break;
5315 case OA_SCALARREF:
a0d0e21e 5316 mod(scalar(kid), type);
79072805
LW		 5317 break;
5318 }
5319 oa >>= 4;
5320 tokid = &kid->op_sibling;
5321 kid = kid->op_sibling;
5322 }
11343788 5323 o->op_private |= numargs;
79072805 5324 if (kid)
22c35a8c 5325 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5326 listkids(o);
79072805 5327 }
22c35a8c 5328 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5329 op_free(o);
54b9620d 5330 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5331 }
5332
79072805
LW		 5333 if (oa) {
5334 while (oa & OA_OPTIONAL)
5335 oa >>= 4;
5336 if (oa && oa != OA_LIST)
22c35a8c 5337 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5338 }
11343788 5339 return o;
79072805
LW		 5340}
5341
5342OP *
cea2e8a9 5343Perl_ck_glob(pTHX_ OP *o)
79072805 5344{
fb73857a 5345 GV *gv;
5346
1f2bfc8a 5347 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5348 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5349
5350 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5351 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5352
a7089531 5353#if defined(PERL_INTERNAL_GLOB) && !defined(MINIPERL_BUILD)
72b16652
GS		 5354 /* XXX this can be tightened up and made more failsafe. */
5355 if (!gv) {
5356 OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
5357 modname->op_private |= OPpCONST_BARE;
5358 ENTER;
5359 utilize(1, start_subparse(FALSE, 0), Nullop, modname,
220398a0 5360 newSVOP(OP_CONST, 0, newSVpvn(":globally", 9)));
72b16652
GS		 5361 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5362 LEAVE;
5363 }
a7089531 5364#endif /* PERL_INTERNAL_GLOB && !MINIPERL_BUILD */
72b16652 5365
b1cb66bf 5366 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5367 append_elem(OP_GLOB, o,
80252599 5368 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5369 o->op_type = OP_LIST;
22c35a8c 5370 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5371 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5372 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5373 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5374 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5375 scalar(newUNOP(OP_RV2CV, 0,
5376 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5377 o = newUNOP(OP_NULL, 0, ck_subr(o));
5378 o->op_targ = OP_GLOB; /* hint at what it used to be */
5379 return o;
b1cb66bf 5380 }
5381 gv = newGVgen("main");
a0d0e21e 5382 gv_IOadd(gv);
11343788
MB		 5383 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5384 scalarkids(o);
5385 return ck_fun(o);
79072805
LW		 5386}
5387
5388OP *
cea2e8a9 5389Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5390{
5391 LOGOP *gwop;
5392 OP *kid;
11343788 5393 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5394
22c35a8c 5395 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5396 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5397
11343788 5398 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5399 OP* k;
11343788
MB		 5400 o = ck_sort(o);
5401 kid = cLISTOPo->op_first->op_sibling;
5402 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5403 kid = k;
5404 }
5405 kid->op_next = (OP*)gwop;
11343788 5406 o->op_flags &= ~OPf_STACKED;
93a17b20 5407 }
11343788 5408 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5409 if (type == OP_MAPWHILE)
5410 list(kid);
5411 else
5412 scalar(kid);
11343788 5413 o = ck_fun(o);
3280af22 5414 if (PL_error_count)
11343788 5415 return o;
aeea060c 5416 kid = cLISTOPo->op_first->op_sibling;
79072805 5417 if (kid->op_type != OP_NULL)
cea2e8a9 5418 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5419 kid = kUNOP->op_first;
5420
a0d0e21e 5421 gwop->op_type = type;
22c35a8c 5422 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5423 gwop->op_first = listkids(o);
79072805
LW		 5424 gwop->op_flags |= OPf_KIDS;
5425 gwop->op_private = 1;
5426 gwop->op_other = LINKLIST(kid);
a0d0e21e 5427 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5428 kid->op_next = (OP*)gwop;
5429
11343788 5430 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5431 if (!kid || !kid->op_sibling)
22c35a8c 5432 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5433 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5434 mod(kid, OP_GREPSTART);
5435
79072805
LW		 5436 return (OP*)gwop;
5437}
5438
5439OP *
cea2e8a9 5440Perl_ck_index(pTHX_ OP *o)
79072805 5441{
11343788
MB		 5442 if (o->op_flags & OPf_KIDS) {
5443 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5444 if (kid)
5445 kid = kid->op_sibling; /* get past "big" */
79072805 5446 if (kid && kid->op_type == OP_CONST)
2779dcf1 5447 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5448 }
11343788 5449 return ck_fun(o);
79072805
LW		 5450}
5451
5452OP *
cea2e8a9 5453Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5454{
5455 /* XXX length optimization goes here */
11343788 5456 return ck_fun(o);
79072805
LW		 5457}
5458
5459OP *
cea2e8a9 5460Perl_ck_lfun(pTHX_ OP *o)
79072805 5461{
5dc0d613
MB		 5462 OPCODE type = o->op_type;
5463 return modkids(ck_fun(o), type);
79072805
LW		 5464}
5465
5466OP *
cea2e8a9 5467Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5468{
20ce7b12 5469 dTHR;
d0334bed
GS		 5470 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5471 switch (cUNOPo->op_first->op_type) {
5472 case OP_RV2AV:
7e291ef1 5473 break; /* Globals via GV can be undef */
d0334bed
GS		 5474 case OP_PADAV:
5475 case OP_AASSIGN: /* Is this a good idea? */
5476 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5477 "defined(@array) is deprecated");
d0334bed
GS		 5478 Perl_warner(aTHX_ WARN_DEPRECATED,
5479 "(Maybe you should just omit the defined()?)\n");
69794302 5480 break;
d0334bed 5481 case OP_RV2HV:
7e291ef1 5482 break; /* Globals via GV can be undef */
d0334bed
GS		 5483 case OP_PADHV:
5484 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5485 "defined(%hash) is deprecated");
d0334bed
GS		 5486 Perl_warner(aTHX_ WARN_DEPRECATED,
5487 "(Maybe you should just omit the defined()?)\n");
5488 break;
5489 default:
5490 /* no warning */
5491 break;
5492 }
69794302
MJD		 5493 }
5494 return ck_rfun(o);
5495}
5496
5497OP *
cea2e8a9 5498Perl_ck_rfun(pTHX_ OP *o)
8990e307 5499{
5dc0d613
MB		 5500 OPCODE type = o->op_type;
5501 return refkids(ck_fun(o), type);
8990e307
LW		 5502}
5503
5504OP *
cea2e8a9 5505Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5506{
5507 register OP *kid;
aeea060c 5508
11343788 5509 kid = cLISTOPo->op_first;
79072805 5510 if (!kid) {
11343788
MB		 5511 o = force_list(o);
5512 kid = cLISTOPo->op_first;
79072805
LW		 5513 }
5514 if (kid->op_type == OP_PUSHMARK)
5515 kid = kid->op_sibling;
11343788 5516 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5517 kid = kid->op_sibling;
5518 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5519 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5520 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5521 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5522 cLISTOPo->op_first->op_sibling = kid;
5523 cLISTOPo->op_last = kid;
79072805
LW		 5524 kid = kid->op_sibling;
5525 }
5526 }
5527
5528 if (!kid)
54b9620d 5529 append_elem(o->op_type, o, newDEFSVOP());
79072805 5530
5dc0d613 5531 o = listkids(o);
bbce6d69 5532
5dc0d613 5533 o->op_private = 0;
36477c24 5534#ifdef USE_LOCALE
3280af22 5535 if (PL_hints & HINT_LOCALE)
5dc0d613 5536 o->op_private |= OPpLOCALE;
bbce6d69 5537#endif
5538
5dc0d613 5539 return o;
bbce6d69 5540}
5541
5542OP *
cea2e8a9 5543Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5544{
5dc0d613 5545 o = ck_fun(o);
bbce6d69 5546
5dc0d613 5547 o->op_private = 0;
36477c24 5548#ifdef USE_LOCALE
3280af22 5549 if (PL_hints & HINT_LOCALE)
5dc0d613 5550 o->op_private |= OPpLOCALE;
bbce6d69 5551#endif
5552
5dc0d613 5553 return o;
bbce6d69 5554}
5555
5556OP *
b162f9ea
IZ		 5557Perl_ck_sassign(pTHX_ OP *o)
5558{
5559 OP *kid = cLISTOPo->op_first;
5560 /* has a disposable target? */
5561 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5562 && !(kid->op_flags & OPf_STACKED))
5563 {
5564 OP *kkid = kid->op_sibling;
5565
5566 /* Can just relocate the target. */
2c2d71f5
JH		 5567 if (kkid && kkid->op_type == OP_PADSV
5568 && !(kkid->op_private & OPpLVAL_INTRO))
5569 {
b162f9ea 5570 /* Concat has problems if target is equal to right arg. */
3dbf192b
IZ		 5571 if (kid->op_type == OP_CONCAT) {
5572 if (kLISTOP->op_first->op_sibling->op_type == OP_PADSV
5573 && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
5574 return o;
b162f9ea 5575 }
3dbf192b
IZ		 5576 else if (kid->op_type == OP_JOIN) {
5577 /* do_join has problems if the arguments coincide with target.
c212fd85
IZ		 5578 In fact the second argument *can* safely coincide,
5579 but ignore=pessimize this rare occasion. */
5580 OP *arg = kLISTOP->op_first->op_sibling; /* Skip PUSHMARK */
5581
5582 while (arg) {
5583 if (arg->op_type == OP_PADSV
5584 && arg->op_targ == kkid->op_targ)
5585 return o;
5586 arg = arg->op_sibling;
5587 }
5588 }
3dbf192b
IZ		 5589 else if (kid->op_type == OP_QUOTEMETA) {
5590 /* quotemeta has problems if the argument coincides with target. */
5591 if (kLISTOP->op_first->op_type == OP_PADSV
5592 && kLISTOP->op_first->op_targ == kkid->op_targ)
5593 return o;
5594 }
b162f9ea 5595 kid->op_targ = kkid->op_targ;
743e66e6 5596 kkid->op_targ = 0;
b162f9ea
IZ		 5597 /* Now we do not need PADSV and SASSIGN. */
5598 kid->op_sibling = o->op_sibling; /* NULL */
5599 cLISTOPo->op_first = NULL;
5600 op_free(o);
5601 op_free(kkid);
5602 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5603 return kid;
5604 }
5605 }
5606 return o;
5607}
5608
5609OP *
cea2e8a9 5610Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5611{
5dc0d613 5612 o->op_private = 0;
36477c24 5613#ifdef USE_LOCALE
3280af22 5614 if (PL_hints & HINT_LOCALE)
5dc0d613 5615 o->op_private |= OPpLOCALE;
bbce6d69 5616#endif
36477c24 5617
5dc0d613 5618 return o;
79072805
LW		 5619}
5620
5621OP *
cea2e8a9 5622Perl_ck_match(pTHX_ OP *o)
79072805 5623{
5dc0d613 5624 o->op_private |= OPpRUNTIME;
11343788 5625 return o;
79072805
LW		 5626}
5627
5628OP *
f5d5a27c
CS		 5629Perl_ck_method(pTHX_ OP *o)
5630{
5631 OP *kid = cUNOPo->op_first;
5632 if (kid->op_type == OP_CONST) {
5633 SV* sv = kSVOP->op_sv;
5634 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5635 OP *cmop;
5636 sv_upgrade(sv, SVt_PVIV);
5637 SvIOK_on(sv);
5638 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5639 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5640 kSVOP->op_sv = Nullsv;
5641 op_free(o);
5642 return cmop;
5643 }
5644 }
5645 return o;
5646}
5647
5648OP *
cea2e8a9 5649Perl_ck_null(pTHX_ OP *o)
79072805 5650{
11343788 5651 return o;
79072805
LW		 5652}
5653
5654OP *
cea2e8a9 5655Perl_ck_repeat(pTHX_ OP *o)
79072805 5656{
11343788
MB		 5657 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5658 o->op_private |= OPpREPEAT_DOLIST;
5659 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5660 }
5661 else
11343788
MB		 5662 scalar(o);
5663 return o;
79072805
LW		 5664}
5665
5666OP *
cea2e8a9 5667Perl_ck_require(pTHX_ OP *o)
8990e307 5668{
11343788
MB		 5669 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5670 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5671
5672 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5673 char *s;
a0d0e21e
LW		 5674 for (s = SvPVX(kid->op_sv); *s; s++) {
5675 if (*s == ':' && s[1] == ':') {
5676 *s = '/';
1aef975c 5677 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5678 --SvCUR(kid->op_sv);
5679 }
8990e307 5680 }
a0d0e21e 5681 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5682 }
5683 }
11343788 5684 return ck_fun(o);
8990e307
LW		 5685}
5686
22c35a8c 5687#if 0
8990e307 5688OP *
cea2e8a9 5689Perl_ck_retarget(pTHX_ OP *o)
79072805 5690{
cea2e8a9 5691 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5692 /* STUB */
11343788 5693 return o;
79072805 5694}
22c35a8c 5695#endif
79072805
LW		 5696
5697OP *
cea2e8a9 5698Perl_ck_select(pTHX_ OP *o)
79072805 5699{
c07a80fd 5700 OP* kid;
11343788
MB		 5701 if (o->op_flags & OPf_KIDS) {
5702 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5703 if (kid && kid->op_sibling) {
11343788 5704 o->op_type = OP_SSELECT;
22c35a8c 5705 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5706 o = ck_fun(o);
5707 return fold_constants(o);
79072805
LW		 5708 }
5709 }
11343788
MB		 5710 o = ck_fun(o);
5711 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5712 if (kid && kid->op_type == OP_RV2GV)
5713 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5714 return o;
79072805
LW		 5715}
5716
5717OP *
cea2e8a9 5718Perl_ck_shift(pTHX_ OP *o)
79072805 5719{
11343788 5720 I32 type = o->op_type;
79072805 5721
11343788 5722 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5723 OP *argop;
5724
11343788 5725 op_free(o);
6d4ff0d2 5726#ifdef USE_THREADS
533c011a 5727 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5728 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5729 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5730 }
5731 else {
5732 argop = newUNOP(OP_RV2AV, 0,
5733 scalar(newGVOP(OP_GV, 0,
5734 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5735 }
5736#else
5737 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5738 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5739 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5740#endif /* USE_THREADS */
5741 return newUNOP(type, 0, scalar(argop));
79072805 5742 }
11343788 5743 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5744}
5745
5746OP *
cea2e8a9 5747Perl_ck_sort(pTHX_ OP *o)
79072805 5748{
5dc0d613 5749 o->op_private = 0;
36477c24 5750#ifdef USE_LOCALE
3280af22 5751 if (PL_hints & HINT_LOCALE)
5dc0d613 5752 o->op_private |= OPpLOCALE;
bbce6d69 5753#endif
5754
9ea6e965 5755 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5756 simplify_sort(o);
9c007264 5757 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5758 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5759 OP *k;
82092f1d 5760 kid = kUNOP->op_first; /* get past null */
79072805 5761
463ee0b2 5762 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5763 linklist(kid);
463ee0b2
LW		 5764 if (kid->op_type == OP_SCOPE) {
5765 k = kid->op_next;
5766 kid->op_next = 0;
79072805 5767 }
463ee0b2 5768 else if (kid->op_type == OP_LEAVE) {
11343788 5769 if (o->op_type == OP_SORT) {
748a9306
LW		 5770 null(kid); /* wipe out leave */
5771 kid->op_next = kid;
463ee0b2 5772
748a9306
LW		 5773 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5774 if (k->op_next == kid)
5775 k->op_next = 0;
5776 }
463ee0b2 5777 }
748a9306
LW		 5778 else
5779 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5780 k = kLISTOP->op_first;
463ee0b2 5781 }
a0d0e21e
LW		 5782 peep(k);
5783
11343788 5784 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5785 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5786 kid->op_next = kid;
5787 else
5788 kid->op_next = k;
11343788 5789 o->op_flags |= OPf_SPECIAL;
79072805 5790 }
c6e96bcb
GS		 5791 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5792 null(cLISTOPo->op_first->op_sibling);
79072805 5793 }
bbce6d69 5794
11343788 5795 return o;
79072805 5796}
bda4119b
GS		 5797
5798STATIC void
cea2e8a9 5799S_simplify_sort(pTHX_ OP *o)
9c007264 5800{
51a19bc0 5801 dTHR;
9c007264
JH		 5802 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5803 OP *k;
5804 int reversed;
350de78d 5805 GV *gv;
9c007264
JH		 5806 if (!(o->op_flags & OPf_STACKED))
5807 return;
9ea6e965
GS		 5808 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5809 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5810 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5811 if (kid->op_type != OP_SCOPE)
5812 return;
5813 kid = kLISTOP->op_last; /* get past scope */
5814 switch(kid->op_type) {
5815 case OP_NCMP:
5816 case OP_I_NCMP:
5817 case OP_SCMP:
5818 break;
5819 default:
5820 return;
5821 }
5822 k = kid; /* remember this node*/
5823 if (kBINOP->op_first->op_type != OP_RV2SV)
5824 return;
5825 kid = kBINOP->op_first; /* get past cmp */
5826 if (kUNOP->op_first->op_type != OP_GV)
5827 return;
5828 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5829 gv = kGVOP_gv;
350de78d 5830 if (GvSTASH(gv) != PL_curstash)
9c007264 5831 return;
350de78d 5832 if (strEQ(GvNAME(gv), "a"))
9c007264 5833 reversed = 0;
350de78d 5834 else if(strEQ(GvNAME(gv), "b"))
9c007264
JH		 5835 reversed = 1;
5836 else
5837 return;
5838 kid = k; /* back to cmp */
5839 if (kBINOP->op_last->op_type != OP_RV2SV)
5840 return;
5841 kid = kBINOP->op_last; /* down to 2nd arg */
5842 if (kUNOP->op_first->op_type != OP_GV)
5843 return;
5844 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5845 gv = kGVOP_gv;
350de78d 5846 if (GvSTASH(gv) != PL_curstash
9c007264 5847 || ( reversed
350de78d
GS		 5848 ? strNE(GvNAME(gv), "a")
5849 : strNE(GvNAME(gv), "b")))
9c007264
JH		 5850 return;
5851 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5852 if (reversed)
5853 o->op_private |= OPpSORT_REVERSE;
5854 if (k->op_type == OP_NCMP)
5855 o->op_private |= OPpSORT_NUMERIC;
5856 if (k->op_type == OP_I_NCMP)
5857 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5858 kid = cLISTOPo->op_first->op_sibling;
5859 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5860 op_free(kid); /* then delete it */
5861 cLISTOPo->op_children--;
9c007264 5862}
79072805
LW		 5863
5864OP *
cea2e8a9 5865Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5866{
5867 register OP *kid;
aeea060c 5868
11343788
MB		 5869 if (o->op_flags & OPf_STACKED)
5870 return no_fh_allowed(o);
79072805 5871
11343788 5872 kid = cLISTOPo->op_first;
8990e307 5873 if (kid->op_type != OP_NULL)
cea2e8a9 5874 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5875 kid = kid->op_sibling;
11343788
MB		 5876 op_free(cLISTOPo->op_first);
5877 cLISTOPo->op_first = kid;
85e6fe83 5878 if (!kid) {
79cb57f6 5879 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5880 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5881 }
79072805
LW		 5882
5883 if (kid->op_type != OP_MATCH) {
5884 OP *sibl = kid->op_sibling;
463ee0b2 5885 kid->op_sibling = 0;
79072805 5886 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5887 if (cLISTOPo->op_first == cLISTOPo->op_last)
5888 cLISTOPo->op_last = kid;
5889 cLISTOPo->op_first = kid;
79072805
LW		 5890 kid->op_sibling = sibl;
5891 }
5892
5893 kid->op_type = OP_PUSHRE;
22c35a8c 5894 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5895 scalar(kid);
5896
5897 if (!kid->op_sibling)
54b9620d 5898 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5899
5900 kid = kid->op_sibling;
5901 scalar(kid);
5902
5903 if (!kid->op_sibling)
11343788 5904 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5905
5906 kid = kid->op_sibling;
5907 scalar(kid);
5908
5909 if (kid->op_sibling)
22c35a8c 5910 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5911
11343788 5912 return o;
79072805
LW		 5913}
5914
5915OP *
eb6e2d6f
GS		 5916Perl_ck_join(pTHX_ OP *o)
5917{
5918 if (ckWARN(WARN_SYNTAX)) {
5919 OP *kid = cLISTOPo->op_first->op_sibling;
5920 if (kid && kid->op_type == OP_MATCH) {
5921 char *pmstr = "STRING";
5922 if (kPMOP->op_pmregexp)
5923 pmstr = kPMOP->op_pmregexp->precomp;
5924 Perl_warner(aTHX_ WARN_SYNTAX,
5925 "/%s/ should probably be written as \"%s\"",
5926 pmstr, pmstr);
5927 }
5928 }
5929 return ck_fun(o);
5930}
5931
5932OP *
cea2e8a9 5933Perl_ck_subr(pTHX_ OP *o)
79072805 5934{
11343788
MB		 5935 dTHR;
5936 OP *prev = ((cUNOPo->op_first->op_sibling)
5937 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5938 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5939 OP *cvop;
5940 char *proto = 0;
5941 CV *cv = 0;
46fc3d4c 5942 GV *namegv = 0;
4633a7c4
LW		 5943 int optional = 0;
5944 I32 arg = 0;
2d8e6c8d 5945 STRLEN n_a;
4633a7c4 5946
d3011074 5947 o->op_private |= OPpENTERSUB_HASTARG;
11343788 5948 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5949 if (cvop->op_type == OP_RV2CV) {
5950 SVOP* tmpop;
11343788 5951 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5952 null(cvop); /* disable rv2cv */
5953 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 5954 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 5955 GV *gv = cGVOPx_gv(tmpop);
350de78d 5956 cv = GvCVu(gv);
76cd736e
GS		 5957 if (!cv)
5958 tmpop->op_private |= OPpEARLY_CV;
5959 else if (SvPOK(cv)) {
350de78d 5960 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 5961 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5962 }
4633a7c4
LW		 5963 }
5964 }
f5d5a27c 5965 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 5966 if (o2->op_type == OP_CONST)
5967 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 5968 else if (o2->op_type == OP_LIST) {
5969 OP *o = ((UNOP*)o2)->op_first->op_sibling;
5970 if (o && o->op_type == OP_CONST)
5971 o->op_private &= ~OPpCONST_STRICT;
5972 }
7a52d87a 5973 }
3280af22
NIS		 5974 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5975 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5976 o->op_private |= OPpENTERSUB_DB;
5977 while (o2 != cvop) {
4633a7c4
LW		 5978 if (proto) {
5979 switch (*proto) {
5980 case '\0':
5dc0d613 5981 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5982 case ';':
5983 optional = 1;
5984 proto++;
5985 continue;
5986 case '$':
5987 proto++;
5988 arg++;
11343788 5989 scalar(o2);
4633a7c4
LW		 5990 break;
5991 case '%':
5992 case '@':
11343788 5993 list(o2);
4633a7c4
LW		 5994 arg++;
5995 break;
5996 case '&':
5997 proto++;
5998 arg++;
11343788 5999 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6000 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6001 break;
6002 case '*':
2ba6ecf4 6003 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6004 proto++;
6005 arg++;
11343788 6006 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6007 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6008 else if (o2->op_type == OP_CONST)
6009 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6010 else if (o2->op_type == OP_ENTERSUB) {
6011 /* accidental subroutine, revert to bareword */
6012 OP *gvop = ((UNOP*)o2)->op_first;
6013 if (gvop && gvop->op_type == OP_NULL) {
6014 gvop = ((UNOP*)gvop)->op_first;
6015 if (gvop) {
6016 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6017 ;
6018 if (gvop &&
6019 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6020 (gvop = ((UNOP*)gvop)->op_first) &&
6021 gvop->op_type == OP_GV)
6022 {
638eceb6 6023 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6024 OP *sibling = o2->op_sibling;
2692f720 6025 SV *n = newSVpvn("",0);
9675f7ac 6026 op_free(o2);
2692f720
GS		 6027 gv_fullname3(n, gv, "");
6028 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6029 sv_chop(n, SvPVX(n)+6);
6030 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6031 prev->op_sibling = o2;
6032 o2->op_sibling = sibling;
6033 }
6034 }
6035 }
6036 }
2ba6ecf4
GS		 6037 scalar(o2);
6038 break;
4633a7c4
LW		 6039 case '\\':
6040 proto++;
6041 arg++;
6042 switch (*proto++) {
6043 case '*':
11343788 6044 if (o2->op_type != OP_RV2GV)
5dc0d613 6045 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6046 goto wrapref;
6047 case '&':
11343788 6048 if (o2->op_type != OP_RV2CV)
5dc0d613 6049 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6050 goto wrapref;
6051 case '$':
386acf99
GS		 6052 if (o2->op_type != OP_RV2SV
6053 && o2->op_type != OP_PADSV
1c01eb51
GS		 6054 && o2->op_type != OP_HELEM
6055 && o2->op_type != OP_AELEM
386acf99
GS		 6056 && o2->op_type != OP_THREADSV)
6057 {
5dc0d613 6058 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6059 }
4633a7c4
LW		 6060 goto wrapref;
6061 case '@':
11343788 6062 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6063 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6064 goto wrapref;
6065 case '%':
11343788 6066 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6067 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6068 wrapref:
6069 {
11343788 6070 OP* kid = o2;
6fa846a0 6071 OP* sib = kid->op_sibling;
4633a7c4 6072 kid->op_sibling = 0;
6fa846a0
GS		 6073 o2 = newUNOP(OP_REFGEN, 0, kid);
6074 o2->op_sibling = sib;
e858de61 6075 prev->op_sibling = o2;
4633a7c4
LW		 6076 }
6077 break;
6078 default: goto oops;
6079 }
6080 break;
b1cb66bf 6081 case ' ':
6082 proto++;
6083 continue;
4633a7c4
LW		 6084 default:
6085 oops:
cea2e8a9 6086 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6087 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6088 }
6089 }
6090 else
11343788
MB		 6091 list(o2);
6092 mod(o2, OP_ENTERSUB);
6093 prev = o2;
6094 o2 = o2->op_sibling;
4633a7c4 6095 }
fb73857a 6096 if (proto && !optional &&
6097 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6098 return too_few_arguments(o, gv_ename(namegv));
11343788 6099 return o;
79072805
LW		 6100}
6101
6102OP *
cea2e8a9 6103Perl_ck_svconst(pTHX_ OP *o)
8990e307 6104{
11343788
MB		 6105 SvREADONLY_on(cSVOPo->op_sv);
6106 return o;
8990e307
LW		 6107}
6108
6109OP *
cea2e8a9 6110Perl_ck_trunc(pTHX_ OP *o)
79072805 6111{
11343788
MB		 6112 if (o->op_flags & OPf_KIDS) {
6113 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6114
a0d0e21e
LW		 6115 if (kid->op_type == OP_NULL)
6116 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6117 if (kid && kid->op_type == OP_CONST &&
6118 (kid->op_private & OPpCONST_BARE))
6119 {
11343788 6120 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6121 kid->op_private &= ~OPpCONST_STRICT;
6122 }
79072805 6123 }
11343788 6124 return ck_fun(o);
79072805
LW		 6125}
6126
463ee0b2
LW		 6127/* A peephole optimizer. We visit the ops in the order they're to execute. */
6128
79072805 6129void
864dbfa3 6130Perl_peep(pTHX_ register OP *o)
79072805 6131{
11343788 6132 dTHR;
79072805 6133 register OP* oldop = 0;
2d8e6c8d 6134 STRLEN n_a;
cd06dffe 6135 OP *last_composite = Nullop;
2d8e6c8d 6136
a0d0e21e 6137 if (!o || o->op_seq)
79072805 6138 return;
a0d0e21e 6139 ENTER;
462e5cf6 6140 SAVEOP();
7766f137 6141 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6142 for (; o; o = o->op_next) {
6143 if (o->op_seq)
6144 break;
3280af22
NIS		 6145 if (!PL_op_seqmax)
6146 PL_op_seqmax++;
533c011a 6147 PL_op = o;
a0d0e21e 6148 switch (o->op_type) {
acb36ea4 6149 case OP_SETSTATE:
a0d0e21e
LW		 6150 case OP_NEXTSTATE:
6151 case OP_DBSTATE:
3280af22
NIS		 6152 PL_curcop = ((COP*)o); /* for warnings */
6153 o->op_seq = PL_op_seqmax++;
cd06dffe 6154 last_composite = Nullop;
a0d0e21e
LW		 6155 break;
6156
a0d0e21e 6157 case OP_CONST:
7a52d87a
GS		 6158 if (cSVOPo->op_private & OPpCONST_STRICT)
6159 no_bareword_allowed(o);
7766f137
GS		 6160#ifdef USE_ITHREADS
6161 /* Relocate sv to the pad for thread safety.
6162 * Despite being a "constant", the SV is written to,
6163 * for reference counts, sv_upgrade() etc. */
6164 if (cSVOP->op_sv) {
6165 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6166 SvREFCNT_dec(PL_curpad[ix]);
6167 SvPADTMP_on(cSVOPo->op_sv);
6168 PL_curpad[ix] = cSVOPo->op_sv;
6169 cSVOPo->op_sv = Nullsv;
6170 o->op_targ = ix;
6171 }
6172#endif
7a52d87a 6173 /* FALL THROUGH */
a0d0e21e
LW		 6174 case OP_UC:
6175 case OP_UCFIRST:
6176 case OP_LC:
6177 case OP_LCFIRST:
ed7ab888
GS		 6178 if ( o->op_next && o->op_next->op_type == OP_STRINGIFY
6179 && !(o->op_next->op_private & OPpTARGET_MY) )
6180 null(o->op_next);
6181 o->op_seq = PL_op_seqmax++;
6182 break;
6183 case OP_CONCAT:
6184 case OP_JOIN:
a0d0e21e 6185 case OP_QUOTEMETA:
b162f9ea
IZ		 6186 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6187 if (o->op_next->op_private & OPpTARGET_MY) {
ed7ab888 6188 if ((o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea
IZ		 6189 || (o->op_type == OP_CONCAT
6190 /* Concat has problems if target is equal to right arg. */
6191 && (((LISTOP*)o)->op_first->op_sibling->op_type
6192 == OP_PADSV)
6193 && (((LISTOP*)o)->op_first->op_sibling->op_targ
743e66e6
GS		 6194 == o->op_next->op_targ)))
6195 {
b162f9ea 6196 goto ignore_optimization;
cd06dffe
GS		 6197 }
6198 else {
b162f9ea 6199 o->op_targ = o->op_next->op_targ;
743e66e6 6200 o->op_next->op_targ = 0;
2c2d71f5 6201 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6202 }
6203 }
a0d0e21e 6204 null(o->op_next);
b162f9ea
IZ		 6205 }
6206 ignore_optimization:
3280af22 6207 o->op_seq = PL_op_seqmax++;
a0d0e21e 6208 break;
8990e307 6209 case OP_STUB:
54310121 6210 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6211 o->op_seq = PL_op_seqmax++;
54310121 6212 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6213 }
748a9306 6214 goto nothin;
79072805 6215 case OP_NULL:
acb36ea4
GS		 6216 if (o->op_targ == OP_NEXTSTATE
6217 || o->op_targ == OP_DBSTATE
6218 || o->op_targ == OP_SETSTATE)
6219 {
3280af22 6220 PL_curcop = ((COP*)o);
acb36ea4 6221 }
748a9306 6222 goto nothin;
79072805 6223 case OP_SCALAR:
93a17b20 6224 case OP_LINESEQ:
463ee0b2 6225 case OP_SCOPE:
748a9306 6226 nothin:
a0d0e21e
LW		 6227 if (oldop && o->op_next) {
6228 oldop->op_next = o->op_next;
79072805
LW		 6229 continue;
6230 }
3280af22 6231 o->op_seq = PL_op_seqmax++;
79072805
LW		 6232 break;
6233
6234 case OP_GV:
a0d0e21e 6235 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 6236 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 6237 null(o->op_next);
6238 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
6239 o->op_next = o->op_next->op_next;
6240 o->op_type = OP_GVSV;
22c35a8c 6241 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6242 }
6243 }
a0d0e21e
LW		 6244 else if (o->op_next->op_type == OP_RV2AV) {
6245 OP* pop = o->op_next->op_next;
6246 IV i;
8990e307 6247 if (pop->op_type == OP_CONST &&
533c011a 6248 (PL_op = pop->op_next) &&
8990e307 6249 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6250 !(pop->op_next->op_private &
68dc0745 6251 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6252 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6253 <= 255 &&
8990e307
LW		 6254 i >= 0)
6255 {
350de78d 6256 GV *gv;
a0d0e21e 6257 null(o->op_next);
8990e307
LW		 6258 null(pop->op_next);
6259 null(pop);
a0d0e21e
LW		 6260 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6261 o->op_next = pop->op_next->op_next;
6262 o->op_type = OP_AELEMFAST;
22c35a8c 6263 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6264 o->op_private = (U8)i;
638eceb6 6265 gv = cGVOPo_gv;
350de78d 6266 GvAVn(gv);
8990e307 6267 }
79072805 6268 }
76cd736e 6269 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
638eceb6 6270 GV *gv = cGVOPo_gv;
76cd736e
GS		 6271 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6272 /* XXX could check prototype here instead of just carping */
6273 SV *sv = sv_newmortal();
6274 gv_efullname3(sv, gv, Nullch);
6275 Perl_warner(aTHX_ WARN_UNSAFE,
6276 "%s() called too early to check prototype",
6277 SvPV_nolen(sv));
6278 }
6279 }
6280
3280af22 6281 o->op_seq = PL_op_seqmax++;
79072805
LW		 6282 break;
6283
a0d0e21e 6284 case OP_MAPWHILE:
79072805
LW		 6285 case OP_GREPWHILE:
6286 case OP_AND:
6287 case OP_OR:
2c2d71f5
JH		 6288 case OP_ANDASSIGN:
6289 case OP_ORASSIGN:
1a67a97c
SM		 6290 case OP_COND_EXPR:
6291 case OP_RANGE:
3280af22 6292 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6293 while (cLOGOP->op_other->op_type == OP_NULL)
6294 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6295 peep(cLOGOP->op_other);
6296 break;
6297
79072805 6298 case OP_ENTERLOOP:
3280af22 6299 o->op_seq = PL_op_seqmax++;
79072805
LW		 6300 peep(cLOOP->op_redoop);
6301 peep(cLOOP->op_nextop);
6302 peep(cLOOP->op_lastop);
6303 break;
6304
8782bef2 6305 case OP_QR:
79072805
LW		 6306 case OP_MATCH:
6307 case OP_SUBST:
3280af22 6308 o->op_seq = PL_op_seqmax++;
a0d0e21e 6309 peep(cPMOP->op_pmreplstart);
79072805
LW		 6310 break;
6311
a0d0e21e 6312 case OP_EXEC:
3280af22 6313 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6314 if (ckWARN(WARN_SYNTAX) && o->op_next
6315 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6316 if (o->op_next->op_sibling &&
20408e3c
GS		 6317 o->op_next->op_sibling->op_type != OP_EXIT &&
6318 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6319 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6320 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6321
57843af0 6322 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
cea2e8a9
GS		 6323 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
6324 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
57843af0 6325 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6326 }
6327 }
6328 break;
aeea060c 6329
c750a3ec
MB		 6330 case OP_HELEM: {
6331 UNOP *rop;
6332 SV *lexname;
6333 GV **fields;
6334 SV **svp, **indsvp;
6335 I32 ind;
6336 char *key;
6337 STRLEN keylen;
aeea060c 6338
377b21bb 6339 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6340 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6341 break;
6342 rop = (UNOP*)((BINOP*)o)->op_first;
6343 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6344 break;
3280af22 6345 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6346 if (!SvOBJECT(lexname))
6347 break;
5196be3e 6348 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6349 if (!fields || !GvHV(*fields))
6350 break;
638eceb6 6351 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6352 key = SvPV(*svp, keylen);
6353 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6354 if (!indsvp) {
88e9b055 6355 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6356 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6357 }
6358 ind = SvIV(*indsvp);
6359 if (ind < 1)
cea2e8a9 6360 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6361 rop->op_type = OP_RV2AV;
22c35a8c 6362 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6363 o->op_type = OP_AELEM;
22c35a8c 6364 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6365 SvREFCNT_dec(*svp);
6366 *svp = newSViv(ind);
6367 break;
6368 }
6369
cd06dffe
GS		 6370 case OP_RV2AV:
6371 case OP_RV2HV:
6372 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6373 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6374 {
cd06dffe 6375 last_composite = o;
e1f15930 6376 }
cd06dffe
GS		 6377 o->op_seq = PL_op_seqmax++;
6378 break;
6379
6380 case OP_RETURN:
970c4905 6381 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6382 o->op_seq = PL_op_seqmax++;
6383 break;
6384 }
6385 /* FALL THROUGH */
6386
6387 case OP_LEAVESUBLV:
6388 if (last_composite) {
6389 OP *r = last_composite;
6390
6391 while (r->op_sibling)
6392 r = r->op_sibling;
6393 if (r->op_next == o
6394 || (r->op_next->op_type == OP_LIST
6395 && r->op_next->op_next == o))
6396 {
6397 if (last_composite->op_type == OP_RV2AV)
6398 yyerror("Lvalue subs returning arrays not implemented yet");
6399 else
6400 yyerror("Lvalue subs returning hashes not implemented yet");
6401 ;
6402 }
6403 }
6404 /* FALL THROUGH */
6405
79072805 6406 default:
3280af22 6407 o->op_seq = PL_op_seqmax++;
79072805
LW		 6408 break;
6409 }
a0d0e21e 6410 oldop = o;
79072805 6411 }
a0d0e21e 6412 LEAVE;
79072805 6413}
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