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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 */
af365420
GS		 26#ifdef USE_ITHREADS
27# define OP_REFCNT_LOCK NOOP
28# define OP_REFCNT_UNLOCK NOOP
29# define OpREFCNT_set(o,n) ((o)->op_targ = (n))
30# define OpREFCNT_dec(o) (--(o)->op_targ)
31#else
32# define OP_REFCNT_LOCK NOOP
33# define OP_REFCNT_UNLOCK NOOP
34# define OpREFCNT_set(o,n) NOOP
35# define OpREFCNT_dec(o) 0
36#endif
7934575e 37
b7dc083c
NIS		 38#ifdef PL_OP_SLAB_ALLOC
39#define SLAB_SIZE 8192
40static char *PL_OpPtr = NULL;
41static int PL_OpSpace = 0;
42#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
43 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
44 else \
45 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
46 } while (0)
47
864dbfa3 48STATIC void *
cea2e8a9 49S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 50{
51 Newz(m,PL_OpPtr,SLAB_SIZE,char);
52 PL_OpSpace = SLAB_SIZE - sz;
53 return PL_OpPtr += PL_OpSpace;
54}
76e3520e 55
b7dc083c
NIS		 56#else
57#define NewOp(m, var, c, type) Newz(m, var, c, type)
58#endif
e50aee73 59/*
5dc0d613 60 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 61 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 62 */
11343788 63#define CHECKOP(type,o) \
3280af22 64 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 65 ? ( op_free((OP*)o), \
cea2e8a9 66 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 67 Nullop ) \
fc0dc3b3 68 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 69
c53d7c7d
HS		 70#define PAD_MAX 999999999
71
76e3520e 72STATIC char*
cea2e8a9 73S_gv_ename(pTHX_ GV *gv)
4633a7c4 74{
2d8e6c8d 75 STRLEN n_a;
4633a7c4 76 SV* tmpsv = sv_newmortal();
46fc3d4c 77 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 78 return SvPV(tmpsv,n_a);
4633a7c4
LW		 79}
80
76e3520e 81STATIC OP *
cea2e8a9 82S_no_fh_allowed(pTHX_ OP *o)
79072805 83{
cea2e8a9 84 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 85 PL_op_desc[o->op_type]));
11343788 86 return o;
79072805
LW		 87}
88
76e3520e 89STATIC OP *
cea2e8a9 90S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 91{
cea2e8a9 92 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 93 return o;
79072805
LW		 94}
95
76e3520e 96STATIC OP *
cea2e8a9 97S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 98{
cea2e8a9 99 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 100 return o;
79072805
LW		 101}
102
76e3520e 103STATIC void
cea2e8a9 104S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 105{
cea2e8a9 106 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 107 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 108}
109
7a52d87a 110STATIC void
cea2e8a9 111S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 112{
5a844595
GS		 113 qerror(Perl_mess(aTHX_
114 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 115 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 116}
117
79072805
LW		 118/* "register" allocation */
119
120PADOFFSET
864dbfa3 121Perl_pad_allocmy(pTHX_ char *name)
93a17b20 122{
11343788 123 dTHR;
a0d0e21e
LW		 124 PADOFFSET off;
125 SV *sv;
126
834a4ddd 127 if (!(
77ca0c92 128 PL_in_my == KEY_our ||
834a4ddd
LW		 129 isALPHA(name[1]) ||
130 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
77ca0c92 131 name[1] == '_' && (int)strlen(name) > 2 ))
834a4ddd 132 {
c4d0567e 133 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 134 /* 1999-02-27 mjd@plover.com */
135 char *p;
136 p = strchr(name, '\0');
137 /* The next block assumes the buffer is at least 205 chars
138 long. At present, it's always at least 256 chars. */
139 if (p-name > 200) {
140 strcpy(name+200, "...");
141 p = name+199;
142 }
143 else {
144 p[1] = '\0';
145 }
146 /* Move everything else down one character */
147 for (; p-name > 2; p--)
148 *p = *(p-1);
46fc3d4c 149 name[2] = toCTRL(name[1]);
150 name[1] = '^';
151 }
cea2e8a9 152 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 153 }
599cee73 154 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 155 SV **svp = AvARRAY(PL_comppad_name);
156 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 157 if ((sv = svp[off])
3280af22 158 && sv != &PL_sv_undef
c53d7c7d 159 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 160 && strEQ(name, SvPVX(sv)))
161 {
cea2e8a9 162 Perl_warner(aTHX_ WARN_UNSAFE,
77ca0c92
LW		 163 "\"%s\" variable %s masks earlier declaration in same %s",
164 (PL_in_my == KEY_our ? "our" : "my"),
165 name,
166 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 167 break;
168 }
169 }
170 }
a0d0e21e
LW		 171 off = pad_alloc(OP_PADSV, SVs_PADMY);
172 sv = NEWSV(1102,0);
93a17b20
LW		 173 sv_upgrade(sv, SVt_PVNV);
174 sv_setpv(sv, name);
3280af22 175 if (PL_in_my_stash) {
c750a3ec 176 if (*name != '$')
cea2e8a9 177 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 178 name));
c750a3ec
MB		 179 SvOBJECT_on(sv);
180 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 181 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
182 PL_sv_objcount++;
c750a3ec 183 }
77ca0c92
LW		 184 if (PL_in_my == KEY_our)
185 SvFLAGS(sv) |= SVpad_OUR;
3280af22 186 av_store(PL_comppad_name, off, sv);
65202027 187 SvNVX(sv) = (NV)PAD_MAX;
8990e307 188 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 189 if (!PL_min_intro_pending)
190 PL_min_intro_pending = off;
191 PL_max_intro_pending = off;
93a17b20 192 if (*name == '@')
3280af22 193 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 194 else if (*name == '%')
3280af22
NIS		 195 av_store(PL_comppad, off, (SV*)newHV());
196 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 197 return off;
198}
199
2680586e
GS		 200#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
201
76e3520e 202STATIC PADOFFSET
cea2e8a9 203S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 204 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 205{
11343788 206 dTHR;
748a9306 207 CV *cv;
93a17b20
LW		 208 I32 off;
209 SV *sv;
93a17b20 210 register I32 i;
c09156bb 211 register PERL_CONTEXT *cx;
93a17b20 212
748a9306 213 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 214 AV *curlist = CvPADLIST(cv);
215 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 216 AV *curname;
4fdae800 217
3280af22 218 if (!svp || *svp == &PL_sv_undef)
4633a7c4 219 continue;
748a9306
LW		 220 curname = (AV*)*svp;
221 svp = AvARRAY(curname);
93965878 222 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 223 if ((sv = svp[off]) &&
3280af22 224 sv != &PL_sv_undef &&
748a9306 225 seq <= SvIVX(sv) &&
13826f2c 226 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 227 strEQ(SvPVX(sv), name))
228 {
5f05dabc 229 I32 depth;
230 AV *oldpad;
231 SV *oldsv;
232
233 depth = CvDEPTH(cv);
234 if (!depth) {
9607fc9c 235 if (newoff) {
236 if (SvFAKE(sv))
237 continue;
4fdae800 238 return 0; /* don't clone from inactive stack frame */
9607fc9c 239 }
5f05dabc 240 depth = 1;
241 }
242 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
243 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 244 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 245 SV *namesv = NEWSV(1103,0);
748a9306 246 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 247 sv_upgrade(namesv, SVt_PVNV);
248 sv_setpv(namesv, name);
3280af22 249 av_store(PL_comppad_name, newoff, namesv);
65202027 250 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
c53d7c7d 251 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 252 SvFAKE_on(namesv); /* A ref, not a real var */
77ca0c92
LW		 253 if (SvFLAGS(sv) & SVpad_OUR)/* An "our" variable */
254 SvFLAGS(namesv) |= SVpad_OUR;
87671ffc 255 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 256 SvOBJECT_on(namesv);
257 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 258 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 259 PL_sv_objcount++;
260 }
3280af22 261 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 262 /* "It's closures all the way down." */
3280af22 263 CvCLONE_on(PL_compcv);
54310121 264 if (cv == startcv) {
3280af22 265 if (CvANON(PL_compcv))
54310121 266 oldsv = Nullsv; /* no need to keep ref */
267 }
268 else {
28757baa 269 CV *bcv;
270 for (bcv = startcv;
271 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 272 bcv = CvOUTSIDE(bcv))
273 {
28757baa 274 if (CvANON(bcv))
275 CvCLONE_on(bcv);
276 else {
6b35e009
GS		 277 if (ckWARN(WARN_CLOSURE)
278 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
279 {
cea2e8a9 280 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 281 "Variable \"%s\" may be unavailable",
28757baa 282 name);
6b35e009 283 }
28757baa 284 break;
285 }
286 }
287 }
288 }
3280af22 289 else if (!CvUNIQUE(PL_compcv)) {
599cee73 290 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 291 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 292 "Variable \"%s\" will not stay shared", name);
5f05dabc 293 }
748a9306 294 }
3280af22 295 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 296 return newoff;
297 }
93a17b20
LW		 298 }
299 }
300
2680586e
GS		 301 if (flags & FINDLEX_NOSEARCH)
302 return 0;
303
93a17b20
LW		 304 /* Nothing in current lexical context--try eval's context, if any.
305 * This is necessary to let the perldb get at lexically scoped variables.
306 * XXX This will also probably interact badly with eval tree caching.
307 */
308
748a9306 309 for (i = cx_ix; i >= 0; i--) {
93a17b20 310 cx = &cxstack[i];
6b35e009 311 switch (CxTYPE(cx)) {
93a17b20 312 default:
748a9306
LW		 313 if (i == 0 && saweval) {
314 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 315 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 316 }
93a17b20
LW		 317 break;
318 case CXt_EVAL:
44a8e56a 319 switch (cx->blk_eval.old_op_type) {
320 case OP_ENTEREVAL:
6b35e009
GS		 321 if (CxREALEVAL(cx))
322 saweval = i;
44a8e56a 323 break;
324 case OP_REQUIRE:
325 /* require must have its own scope */
326 return 0;
327 }
93a17b20 328 break;
7766f137 329 case CXt_FORMAT:
93a17b20
LW		 330 case CXt_SUB:
331 if (!saweval)
332 return 0;
333 cv = cx->blk_sub.cv;
3280af22 334 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 335 saweval = i; /* so we know where we were called from */
93a17b20 336 continue;
93a17b20 337 }
748a9306 338 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 339 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 340 }
341 }
342
748a9306
LW		 343 return 0;
344}
a0d0e21e 345
748a9306 346PADOFFSET
864dbfa3 347Perl_pad_findmy(pTHX_ char *name)
748a9306 348{
11343788 349 dTHR;
748a9306 350 I32 off;
54310121 351 I32 pendoff = 0;
748a9306 352 SV *sv;
3280af22
NIS		 353 SV **svp = AvARRAY(PL_comppad_name);
354 U32 seq = PL_cop_seqmax;
6b35e009 355 PERL_CONTEXT *cx;
33b8ce05 356 CV *outside;
748a9306 357
11343788
MB		 358#ifdef USE_THREADS
359 /*
360 * Special case to get lexical (and hence per-thread) @_.
361 * XXX I need to find out how to tell at parse-time whether use
362 * of @_ should refer to a lexical (from a sub) or defgv (global
363 * scope and maybe weird sub-ish things like formats). See
364 * startsub in perly.y. It's possible that @_ could be lexical
365 * (at least from subs) even in non-threaded perl.
366 */
367 if (strEQ(name, "@_"))
368 return 0; /* success. (NOT_IN_PAD indicates failure) */
369#endif /* USE_THREADS */
370
748a9306 371 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 372 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 373 if ((sv = svp[off]) &&
3280af22 374 sv != &PL_sv_undef &&
54310121 375 (!SvIVX(sv) ||
376 (seq <= SvIVX(sv) &&
377 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 378 strEQ(SvPVX(sv), name))
379 {
77ca0c92 380 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 381 return (PADOFFSET)off;
382 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 383 }
384 }
748a9306 385
33b8ce05
GS		 386 outside = CvOUTSIDE(PL_compcv);
387
388 /* Check if if we're compiling an eval'', and adjust seq to be the
389 * eval's seq number. This depends on eval'' having a non-null
390 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 391 * identified by CvEVAL being true and CvGV being null. */
392 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 393 cx = &cxstack[cxstack_ix];
394 if (CxREALEVAL(cx))
395 seq = cx->blk_oldcop->cop_seq;
396 }
397
748a9306 398 /* See if it's in a nested scope */
2680586e 399 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 400 if (off) {
401 /* If there is a pending local definition, this new alias must die */
402 if (pendoff)
3280af22 403 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 404 return off; /* pad_findlex returns 0 for failure...*/
54310121 405 }
11343788 406 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 407}
408
409void
864dbfa3 410Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 411{
0453d815 412 dTHR;
93a17b20 413 I32 off;
3280af22 414 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 415 SV *sv;
3280af22
NIS		 416 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
417 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 418 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
419 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 420 }
421 }
422 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 423 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 424 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 425 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 426 }
427}
428
429PADOFFSET
864dbfa3 430Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 431{
11343788 432 dTHR;
79072805
LW		 433 SV *sv;
434 I32 retval;
435
3280af22 436 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 437 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 438 if (PL_pad_reset_pending)
a0d0e21e 439 pad_reset();
ed6116ce 440 if (tmptype & SVs_PADMY) {
79072805 441 do {
3280af22 442 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 443 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 444 retval = AvFILLp(PL_comppad);
79072805
LW		 445 }
446 else {
3280af22
NIS		 447 SV **names = AvARRAY(PL_comppad_name);
448 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 449 for (;;) {
450 /*
451 * "foreach" index vars temporarily become aliases to non-"my"
452 * values. Thus we must skip, not just pad values that are
453 * marked as current pad values, but also those with names.
454 */
3280af22
NIS		 455 if (++PL_padix <= names_fill &&
456 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 457 continue;
3280af22 458 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 459 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 460 break;
461 }
3280af22 462 retval = PL_padix;
79072805 463 }
8990e307 464 SvFLAGS(sv) |= tmptype;
3280af22 465 PL_curpad = AvARRAY(PL_comppad);
11343788 466#ifdef USE_THREADS
b900a521
JH		 467 DEBUG_X(PerlIO_printf(Perl_debug_log,
468 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
469 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 470 (long) retval, PL_op_name[optype]));
11343788 471#else
b900a521
JH		 472 DEBUG_X(PerlIO_printf(Perl_debug_log,
473 "Pad 0x%"UVxf" alloc %ld for %s\n",
474 PTR2UV(PL_curpad),
22c35a8c 475 (long) retval, PL_op_name[optype]));
11343788 476#endif /* USE_THREADS */
79072805
LW		 477 return (PADOFFSET)retval;
478}
479
480SV *
864dbfa3 481Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 482{
11343788
MB		 483 dTHR;
484#ifdef USE_THREADS
b900a521 485 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 486 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
487 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 488#else
79072805 489 if (!po)
cea2e8a9 490 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 491 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
492 PTR2UV(PL_curpad), (IV)po));
11343788 493#endif /* USE_THREADS */
3280af22 494 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 495}
496
497void
864dbfa3 498Perl_pad_free(pTHX_ PADOFFSET po)
79072805 499{
11343788 500 dTHR;
3280af22 501 if (!PL_curpad)
a0d0e21e 502 return;
3280af22 503 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 504 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 505 if (!po)
cea2e8a9 506 Perl_croak(aTHX_ "panic: pad_free po");
11343788 507#ifdef USE_THREADS
b900a521 508 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 509 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 510 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 511#else
97835f67
JH		 512 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
513 PTR2UV(PL_curpad), (IV)po));
11343788 514#endif /* USE_THREADS */
3280af22
NIS		 515 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
516 SvPADTMP_off(PL_curpad[po]);
517 if ((I32)po < PL_padix)
518 PL_padix = po - 1;
79072805
LW		 519}
520
521void
864dbfa3 522Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 523{
11343788 524 dTHR;
3280af22 525 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 526 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 527 if (!po)
cea2e8a9 528 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 529#ifdef USE_THREADS
b900a521 530 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 531 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
532 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 533#else
97835f67
JH		 534 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
535 PTR2UV(PL_curpad), (IV)po));
11343788 536#endif /* USE_THREADS */
3280af22
NIS		 537 SvPADTMP_off(PL_curpad[po]);
538 PL_curpad[po] = NEWSV(1107,0);
539 SvPADTMP_on(PL_curpad[po]);
540 if ((I32)po < PL_padix)
541 PL_padix = po - 1;
79072805
LW		 542}
543
d9bb4600
GS		 544/* XXX pad_reset() is currently disabled because it results in serious bugs.
545 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
546 * on the stack by OPs that use them, there are several ways to get an alias
547 * to a shared TARG. Such an alias will change randomly and unpredictably.
548 * We avoid doing this until we can think of a Better Way.
549 * GSAR 97-10-29 */
79072805 550void
864dbfa3 551Perl_pad_reset(pTHX)
79072805 552{
d9bb4600 553#ifdef USE_BROKEN_PAD_RESET
11343788 554 dTHR;
79072805
LW		 555 register I32 po;
556
6b88bc9c 557 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 558 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 559#ifdef USE_THREADS
b900a521
JH		 560 DEBUG_X(PerlIO_printf(Perl_debug_log,
561 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
562 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 563#else
b900a521
JH		 564 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
565 PTR2UV(PL_curpad)));
11343788 566#endif /* USE_THREADS */
6b88bc9c
GS		 567 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
568 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
569 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
570 SvPADTMP_off(PL_curpad[po]);
748a9306 571 }
6b88bc9c 572 PL_padix = PL_padix_floor;
79072805 573 }
d9bb4600 574#endif
3280af22 575 PL_pad_reset_pending = FALSE;
79072805
LW		 576}
577
a863c7d1 578#ifdef USE_THREADS
54b9620d 579/* find_threadsv is not reentrant */
a863c7d1 580PADOFFSET
864dbfa3 581Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 582{
583 dTHR;
584 char *p;
585 PADOFFSET key;
554b3eca 586 SV **svp;
54b9620d 587 /* We currently only handle names of a single character */
533c011a 588 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 589 if (!p)
590 return NOT_IN_PAD;
533c011a 591 key = p - PL_threadsv_names;
2d8e6c8d 592 MUTEX_LOCK(&thr->mutex);
54b9620d 593 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 594 if (svp)
595 MUTEX_UNLOCK(&thr->mutex);
596 else {
554b3eca 597 SV *sv = NEWSV(0, 0);
54b9620d 598 av_store(thr->threadsv, key, sv);
940cb80d 599 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 600 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 601 /*
602 * Some magic variables used to be automagically initialised
603 * in gv_fetchpv. Those which are now per-thread magicals get
604 * initialised here instead.
605 */
606 switch (*name) {
54b9620d
MB		 607 case '_':
608 break;
554b3eca
MB		 609 case ';':
610 sv_setpv(sv, "\034");
54b9620d 611 sv_magic(sv, 0, 0, name, 1);
554b3eca 612 break;
c277df42
IZ		 613 case '&':
614 case '`':
615 case '\'':
533c011a 616 PL_sawampersand = TRUE;
a3f914c5
GS		 617 /* FALL THROUGH */
618 case '1':
619 case '2':
620 case '3':
621 case '4':
622 case '5':
623 case '6':
624 case '7':
625 case '8':
626 case '9':
c277df42 627 SvREADONLY_on(sv);
d8b5173a 628 /* FALL THROUGH */
067391ea
GS		 629
630 /* XXX %! tied to Errno.pm needs to be added here.
631 * See gv_fetchpv(). */
632 /* case '!': */
633
54b9620d
MB		 634 default:
635 sv_magic(sv, 0, 0, name, 1);
554b3eca 636 }
bf49b057 637 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 638 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 639 sv, (*name < 32) ? "^" : "",
640 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 641 }
642 return key;
643}
644#endif /* USE_THREADS */
645
79072805
LW		 646/* Destructor */
647
648void
864dbfa3 649Perl_op_free(pTHX_ OP *o)
79072805 650{
85e6fe83 651 register OP *kid, *nextkid;
acb36ea4 652 OPCODE type;
79072805 653
5dc0d613 654 if (!o || o->op_seq == (U16)-1)
79072805
LW		 655 return;
656
7934575e
GS		 657 if (o->op_private & OPpREFCOUNTED) {
658 switch (o->op_type) {
659 case OP_LEAVESUB:
660 case OP_LEAVESUBLV:
661 case OP_LEAVEEVAL:
662 case OP_LEAVE:
663 case OP_SCOPE:
664 case OP_LEAVEWRITE:
665 OP_REFCNT_LOCK;
666 if (OpREFCNT_dec(o)) {
667 OP_REFCNT_UNLOCK;
668 return;
669 }
670 OP_REFCNT_UNLOCK;
671 break;
672 default:
673 break;
674 }
675 }
676
11343788
MB		 677 if (o->op_flags & OPf_KIDS) {
678 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 679 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 680 op_free(kid);
85e6fe83 681 }
79072805 682 }
acb36ea4
GS		 683 type = o->op_type;
684 if (type == OP_NULL)
685 type = o->op_targ;
686
687 /* COP* is not cleared by op_clear() so that we may track line
688 * numbers etc even after null() */
689 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
690 cop_free((COP*)o);
691
692 op_clear(o);
693
694#ifdef PL_OP_SLAB_ALLOC
695 if ((char *) o == PL_OpPtr)
696 {
697 }
698#else
699 Safefree(o);
700#endif
701}
79072805 702
acb36ea4
GS		 703STATIC void
704S_op_clear(pTHX_ OP *o)
705{
11343788 706 switch (o->op_type) {
acb36ea4
GS		 707 case OP_NULL: /* Was holding old type, if any. */
708 case OP_ENTEREVAL: /* Was holding hints. */
709#ifdef USE_THREADS
710 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
711#endif
712 o->op_targ = 0;
a0d0e21e 713 break;
554b3eca 714#ifdef USE_THREADS
8dd3ba40
SM		 715 case OP_ENTERITER:
716 if (!(o->op_flags & OPf_SPECIAL))
717 break;
718 /* FALL THROUGH */
554b3eca 719#endif /* USE_THREADS */
a6006777 720 default:
ac4c12e7 721 if (!(o->op_flags & OPf_REF)
0b94c7bb 722 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 723 break;
724 /* FALL THROUGH */
463ee0b2 725 case OP_GVSV:
79072805 726 case OP_GV:
a6006777 727 case OP_AELEMFAST:
350de78d 728#ifdef USE_ITHREADS
971a9dd3
GS		 729 if (cPADOPo->op_padix > 0) {
730 if (PL_curpad) {
638eceb6 731 GV *gv = cGVOPo_gv;
971a9dd3
GS		 732 pad_swipe(cPADOPo->op_padix);
733 /* No GvIN_PAD_off(gv) here, because other references may still
734 * exist on the pad */
735 SvREFCNT_dec(gv);
736 }
737 cPADOPo->op_padix = 0;
738 }
350de78d 739#else
971a9dd3 740 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 741 cSVOPo->op_sv = Nullsv;
350de78d 742#endif
79072805
LW		 743 break;
744 case OP_CONST:
11343788 745 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 746 cSVOPo->op_sv = Nullsv;
79072805 747 break;
748a9306
LW		 748 case OP_GOTO:
749 case OP_NEXT:
750 case OP_LAST:
751 case OP_REDO:
11343788 752 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 753 break;
754 /* FALL THROUGH */
a0d0e21e 755 case OP_TRANS:
acb36ea4 756 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 757 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 758 cSVOPo->op_sv = Nullsv;
759 }
760 else {
a0ed51b3 761 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 762 cPVOPo->op_pv = Nullch;
763 }
a0d0e21e
LW		 764 break;
765 case OP_SUBST:
11343788 766 op_free(cPMOPo->op_pmreplroot);
971a9dd3 767 goto clear_pmop;
748a9306 768 case OP_PUSHRE:
971a9dd3
GS		 769#ifdef USE_ITHREADS
770 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
771 if (PL_curpad) {
772 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
773 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
774 /* No GvIN_PAD_off(gv) here, because other references may still
775 * exist on the pad */
776 SvREFCNT_dec(gv);
777 }
778 }
779#else
780 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
781#endif
782 /* FALL THROUGH */
a0d0e21e 783 case OP_MATCH:
8782bef2 784 case OP_QR:
971a9dd3
GS		 785clear_pmop:
786 cPMOPo->op_pmreplroot = Nullop;
c277df42 787 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 788 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 789 break;
79072805
LW		 790 }
791
743e66e6 792 if (o->op_targ > 0) {
11343788 793 pad_free(o->op_targ);
743e66e6
GS		 794 o->op_targ = 0;
795 }
79072805
LW		 796}
797
76e3520e 798STATIC void
3eb57f73
HS		 799S_cop_free(pTHX_ COP* cop)
800{
801 Safefree(cop->cop_label);
57843af0
GS		 802#ifdef USE_ITHREADS
803 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 804 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 805#else
11faa288 806 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 807 SvREFCNT_dec(CopFILEGV(cop));
57843af0 808#endif
0453d815 809 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 810 SvREFCNT_dec(cop->cop_warnings);
811}
812
813STATIC void
cea2e8a9 814S_null(pTHX_ OP *o)
8990e307 815{
acb36ea4
GS		 816 if (o->op_type == OP_NULL)
817 return;
818 op_clear(o);
11343788
MB		 819 o->op_targ = o->op_type;
820 o->op_type = OP_NULL;
22c35a8c 821 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 822}
823
79072805
LW		 824/* Contextualizers */
825
463ee0b2 826#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 827
828OP *
864dbfa3 829Perl_linklist(pTHX_ OP *o)
79072805
LW		 830{
831 register OP *kid;
832
11343788
MB		 833 if (o->op_next)
834 return o->op_next;
79072805
LW		 835
836 /* establish postfix order */
11343788
MB		 837 if (cUNOPo->op_first) {
838 o->op_next = LINKLIST(cUNOPo->op_first);
839 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 840 if (kid->op_sibling)
841 kid->op_next = LINKLIST(kid->op_sibling);
842 else
11343788 843 kid->op_next = o;
79072805
LW		 844 }
845 }
846 else
11343788 847 o->op_next = o;
79072805 848
11343788 849 return o->op_next;
79072805
LW		 850}
851
852OP *
864dbfa3 853Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 854{
855 OP *kid;
11343788
MB		 856 if (o && o->op_flags & OPf_KIDS) {
857 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 858 scalar(kid);
859 }
11343788 860 return o;
79072805
LW		 861}
862
76e3520e 863STATIC OP *
cea2e8a9 864S_scalarboolean(pTHX_ OP *o)
8990e307 865{
d008e5eb 866 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 867 dTHR;
d008e5eb 868 if (ckWARN(WARN_SYNTAX)) {
57843af0 869 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 870
d008e5eb 871 if (PL_copline != NOLINE)
57843af0 872 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 873 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 874 CopLINE_set(PL_curcop, oldline);
d008e5eb 875 }
a0d0e21e 876 }
11343788 877 return scalar(o);
8990e307
LW		 878}
879
880OP *
864dbfa3 881Perl_scalar(pTHX_ OP *o)
79072805
LW		 882{
883 OP *kid;
884
a0d0e21e 885 /* assumes no premature commitment */
3280af22 886 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 887 || o->op_type == OP_RETURN)
7e363e51 888 {
11343788 889 return o;
7e363e51 890 }
79072805 891
5dc0d613 892 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 893
11343788 894 switch (o->op_type) {
79072805 895 case OP_REPEAT:
11343788
MB		 896 if (o->op_private & OPpREPEAT_DOLIST)
897 null(((LISTOP*)cBINOPo->op_first)->op_first);
898 scalar(cBINOPo->op_first);
8990e307 899 break;
79072805
LW		 900 case OP_OR:
901 case OP_AND:
902 case OP_COND_EXPR:
11343788 903 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 904 scalar(kid);
79072805 905 break;
a0d0e21e 906 case OP_SPLIT:
11343788 907 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 908 if (!kPMOP->op_pmreplroot)
909 deprecate("implicit split to @_");
910 }
911 /* FALL THROUGH */
79072805 912 case OP_MATCH:
8782bef2 913 case OP_QR:
79072805
LW		 914 case OP_SUBST:
915 case OP_NULL:
8990e307 916 default:
11343788
MB		 917 if (o->op_flags & OPf_KIDS) {
918 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 919 scalar(kid);
920 }
79072805
LW		 921 break;
922 case OP_LEAVE:
923 case OP_LEAVETRY:
5dc0d613 924 kid = cLISTOPo->op_first;
54310121 925 scalar(kid);
926 while (kid = kid->op_sibling) {
927 if (kid->op_sibling)
928 scalarvoid(kid);
929 else
930 scalar(kid);
931 }
3280af22 932 WITH_THR(PL_curcop = &PL_compiling);
54310121 933 break;
748a9306 934 case OP_SCOPE:
79072805 935 case OP_LINESEQ:
8990e307 936 case OP_LIST:
11343788 937 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 938 if (kid->op_sibling)
939 scalarvoid(kid);
940 else
941 scalar(kid);
942 }
3280af22 943 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 944 break;
945 }
11343788 946 return o;
79072805
LW		 947}
948
949OP *
864dbfa3 950Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 951{
952 OP *kid;
8990e307
LW		 953 char* useless = 0;
954 SV* sv;
2ebea0a1
GS		 955 U8 want;
956
acb36ea4
GS		 957 if (o->op_type == OP_NEXTSTATE
958 || o->op_type == OP_SETSTATE
959 || o->op_type == OP_DBSTATE
960 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
961 || o->op_targ == OP_SETSTATE
962 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 963 {
964 dTHR;
965 PL_curcop = (COP*)o; /* for warning below */
966 }
79072805 967
54310121 968 /* assumes no premature commitment */
2ebea0a1
GS		 969 want = o->op_flags & OPf_WANT;
970 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 971 || o->op_type == OP_RETURN)
7e363e51 972 {
11343788 973 return o;
7e363e51 974 }
79072805 975
b162f9ea 976 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 977 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
978 {
b162f9ea 979 return scalar(o); /* As if inside SASSIGN */
7e363e51 980 }
b162f9ea 981
5dc0d613 982 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 983
11343788 984 switch (o->op_type) {
79072805 985 default:
22c35a8c 986 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 987 break;
36477c24 988 /* FALL THROUGH */
989 case OP_REPEAT:
11343788 990 if (o->op_flags & OPf_STACKED)
8990e307 991 break;
5d82c453
GA		 992 goto func_ops;
993 case OP_SUBSTR:
994 if (o->op_private == 4)
995 break;
8990e307
LW		 996 /* FALL THROUGH */
997 case OP_GVSV:
998 case OP_WANTARRAY:
999 case OP_GV:
1000 case OP_PADSV:
1001 case OP_PADAV:
1002 case OP_PADHV:
1003 case OP_PADANY:
1004 case OP_AV2ARYLEN:
8990e307 1005 case OP_REF:
a0d0e21e
LW		 1006 case OP_REFGEN:
1007 case OP_SREFGEN:
8990e307
LW		 1008 case OP_DEFINED:
1009 case OP_HEX:
1010 case OP_OCT:
1011 case OP_LENGTH:
8990e307
LW		 1012 case OP_VEC:
1013 case OP_INDEX:
1014 case OP_RINDEX:
1015 case OP_SPRINTF:
1016 case OP_AELEM:
1017 case OP_AELEMFAST:
1018 case OP_ASLICE:
8990e307
LW		 1019 case OP_HELEM:
1020 case OP_HSLICE:
1021 case OP_UNPACK:
1022 case OP_PACK:
8990e307
LW		 1023 case OP_JOIN:
1024 case OP_LSLICE:
1025 case OP_ANONLIST:
1026 case OP_ANONHASH:
1027 case OP_SORT:
1028 case OP_REVERSE:
1029 case OP_RANGE:
1030 case OP_FLIP:
1031 case OP_FLOP:
1032 case OP_CALLER:
1033 case OP_FILENO:
1034 case OP_EOF:
1035 case OP_TELL:
1036 case OP_GETSOCKNAME:
1037 case OP_GETPEERNAME:
1038 case OP_READLINK:
1039 case OP_TELLDIR:
1040 case OP_GETPPID:
1041 case OP_GETPGRP:
1042 case OP_GETPRIORITY:
1043 case OP_TIME:
1044 case OP_TMS:
1045 case OP_LOCALTIME:
1046 case OP_GMTIME:
1047 case OP_GHBYNAME:
1048 case OP_GHBYADDR:
1049 case OP_GHOSTENT:
1050 case OP_GNBYNAME:
1051 case OP_GNBYADDR:
1052 case OP_GNETENT:
1053 case OP_GPBYNAME:
1054 case OP_GPBYNUMBER:
1055 case OP_GPROTOENT:
1056 case OP_GSBYNAME:
1057 case OP_GSBYPORT:
1058 case OP_GSERVENT:
1059 case OP_GPWNAM:
1060 case OP_GPWUID:
1061 case OP_GGRNAM:
1062 case OP_GGRGID:
1063 case OP_GETLOGIN:
5d82c453 1064 func_ops:
11343788 1065 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 1066 useless = PL_op_desc[o->op_type];
8990e307
LW		 1067 break;
1068
1069 case OP_RV2GV:
1070 case OP_RV2SV:
1071 case OP_RV2AV:
1072 case OP_RV2HV:
11343788
MB		 1073 if (!(o->op_private & OPpLVAL_INTRO) &&
1074 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1075 useless = "a variable";
1076 break;
79072805
LW		 1077
1078 case OP_CONST:
7766f137 1079 sv = cSVOPo_sv;
7a52d87a
GS		 1080 if (cSVOPo->op_private & OPpCONST_STRICT)
1081 no_bareword_allowed(o);
1082 else {
d008e5eb
GS		 1083 dTHR;
1084 if (ckWARN(WARN_VOID)) {
1085 useless = "a constant";
1086 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1087 useless = 0;
1088 else if (SvPOK(sv)) {
1089 if (strnEQ(SvPVX(sv), "di", 2) ||
1090 strnEQ(SvPVX(sv), "ds", 2) ||
1091 strnEQ(SvPVX(sv), "ig", 2))
1092 useless = 0;
1093 }
8990e307
LW		 1094 }
1095 }
acb36ea4 1096 null(o); /* don't execute or even remember it */
79072805
LW		 1097 break;
1098
1099 case OP_POSTINC:
11343788 1100 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1101 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1102 break;
1103
1104 case OP_POSTDEC:
11343788 1105 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1106 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1107 break;
1108
79072805
LW		 1109 case OP_OR:
1110 case OP_AND:
1111 case OP_COND_EXPR:
11343788 1112 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1113 scalarvoid(kid);
1114 break;
5aabfad6 1115
a0d0e21e 1116 case OP_NULL:
11343788 1117 if (o->op_flags & OPf_STACKED)
a0d0e21e 1118 break;
5aabfad6 1119 /* FALL THROUGH */
2ebea0a1
GS		 1120 case OP_NEXTSTATE:
1121 case OP_DBSTATE:
79072805
LW		 1122 case OP_ENTERTRY:
1123 case OP_ENTER:
1124 case OP_SCALAR:
11343788 1125 if (!(o->op_flags & OPf_KIDS))
79072805 1126 break;
54310121 1127 /* FALL THROUGH */
463ee0b2 1128 case OP_SCOPE:
79072805
LW		 1129 case OP_LEAVE:
1130 case OP_LEAVETRY:
a0d0e21e 1131 case OP_LEAVELOOP:
79072805 1132 case OP_LINESEQ:
79072805 1133 case OP_LIST:
11343788 1134 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1135 scalarvoid(kid);
1136 break;
c90c0ff4 1137 case OP_ENTEREVAL:
5196be3e 1138 scalarkids(o);
c90c0ff4 1139 break;
5aabfad6 1140 case OP_REQUIRE:
c90c0ff4 1141 /* all requires must return a boolean value */
5196be3e
MB		 1142 o->op_flags &= ~OPf_WANT;
1143 return scalar(o);
a0d0e21e 1144 case OP_SPLIT:
11343788 1145 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1146 if (!kPMOP->op_pmreplroot)
1147 deprecate("implicit split to @_");
1148 }
1149 break;
79072805 1150 }
d008e5eb
GS		 1151 if (useless) {
1152 dTHR;
1153 if (ckWARN(WARN_VOID))
cea2e8a9 1154 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1155 }
11343788 1156 return o;
79072805
LW		 1157}
1158
1159OP *
864dbfa3 1160Perl_listkids(pTHX_ OP *o)
79072805
LW		 1161{
1162 OP *kid;
11343788
MB		 1163 if (o && o->op_flags & OPf_KIDS) {
1164 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1165 list(kid);
1166 }
11343788 1167 return o;
79072805
LW		 1168}
1169
1170OP *
864dbfa3 1171Perl_list(pTHX_ OP *o)
79072805
LW		 1172{
1173 OP *kid;
1174
a0d0e21e 1175 /* assumes no premature commitment */
3280af22 1176 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1177 || o->op_type == OP_RETURN)
7e363e51 1178 {
11343788 1179 return o;
7e363e51 1180 }
79072805 1181
b162f9ea 1182 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1183 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1184 {
b162f9ea 1185 return o; /* As if inside SASSIGN */
7e363e51 1186 }
b162f9ea 1187
5dc0d613 1188 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1189
11343788 1190 switch (o->op_type) {
79072805
LW		 1191 case OP_FLOP:
1192 case OP_REPEAT:
11343788 1193 list(cBINOPo->op_first);
79072805
LW		 1194 break;
1195 case OP_OR:
1196 case OP_AND:
1197 case OP_COND_EXPR:
11343788 1198 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1199 list(kid);
1200 break;
1201 default:
1202 case OP_MATCH:
8782bef2 1203 case OP_QR:
79072805
LW		 1204 case OP_SUBST:
1205 case OP_NULL:
11343788 1206 if (!(o->op_flags & OPf_KIDS))
79072805 1207 break;
11343788
MB		 1208 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1209 list(cBINOPo->op_first);
1210 return gen_constant_list(o);
79072805
LW		 1211 }
1212 case OP_LIST:
11343788 1213 listkids(o);
79072805
LW		 1214 break;
1215 case OP_LEAVE:
1216 case OP_LEAVETRY:
5dc0d613 1217 kid = cLISTOPo->op_first;
54310121 1218 list(kid);
1219 while (kid = kid->op_sibling) {
1220 if (kid->op_sibling)
1221 scalarvoid(kid);
1222 else
1223 list(kid);
1224 }
3280af22 1225 WITH_THR(PL_curcop = &PL_compiling);
54310121 1226 break;
748a9306 1227 case OP_SCOPE:
79072805 1228 case OP_LINESEQ:
11343788 1229 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1230 if (kid->op_sibling)
1231 scalarvoid(kid);
1232 else
1233 list(kid);
1234 }
3280af22 1235 WITH_THR(PL_curcop = &PL_compiling);
79072805 1236 break;
c90c0ff4 1237 case OP_REQUIRE:
1238 /* all requires must return a boolean value */
5196be3e
MB		 1239 o->op_flags &= ~OPf_WANT;
1240 return scalar(o);
79072805 1241 }
11343788 1242 return o;
79072805
LW		 1243}
1244
1245OP *
864dbfa3 1246Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1247{
1248 OP *kid;
1249
11343788
MB		 1250 if (o) {
1251 if (o->op_type == OP_LINESEQ ||
1252 o->op_type == OP_SCOPE ||
1253 o->op_type == OP_LEAVE ||
1254 o->op_type == OP_LEAVETRY)
463ee0b2 1255 {
0f15f207 1256 dTHR;
11343788 1257 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1258 if (kid->op_sibling) {
463ee0b2 1259 scalarvoid(kid);
ed6116ce 1260 }
463ee0b2 1261 }
3280af22 1262 PL_curcop = &PL_compiling;
79072805 1263 }
11343788 1264 o->op_flags &= ~OPf_PARENS;
3280af22 1265 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1266 o->op_flags |= OPf_PARENS;
79072805 1267 }
8990e307 1268 else
11343788
MB		 1269 o = newOP(OP_STUB, 0);
1270 return o;
79072805
LW		 1271}
1272
76e3520e 1273STATIC OP *
cea2e8a9 1274S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1275{
1276 OP *kid;
11343788
MB		 1277 if (o && o->op_flags & OPf_KIDS) {
1278 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1279 mod(kid, type);
79072805 1280 }
11343788 1281 return o;
79072805
LW		 1282}
1283
79072805 1284OP *
864dbfa3 1285Perl_mod(pTHX_ OP *o, I32 type)
79072805 1286{
11343788 1287 dTHR;
79072805
LW		 1288 OP *kid;
1289 SV *sv;
2d8e6c8d 1290 STRLEN n_a;
79072805 1291
3280af22 1292 if (!o || PL_error_count)
11343788 1293 return o;
79072805 1294
b162f9ea 1295 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1296 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1297 {
b162f9ea 1298 return o;
7e363e51 1299 }
b162f9ea 1300
11343788 1301 switch (o->op_type) {
68dc0745 1302 case OP_UNDEF:
3280af22 1303 PL_modcount++;
5dc0d613 1304 return o;
a0d0e21e 1305 case OP_CONST:
11343788 1306 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1307 goto nomod;
3280af22 1308 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1309 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1310 PL_eval_start = 0;
a0d0e21e
LW		 1311 }
1312 else if (!type) {
3280af22
NIS		 1313 SAVEI32(PL_compiling.cop_arybase);
1314 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1315 }
1316 else if (type == OP_REFGEN)
1317 goto nomod;
1318 else
cea2e8a9 1319 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1320 break;
5f05dabc 1321 case OP_STUB:
5196be3e 1322 if (o->op_flags & OPf_PARENS)
5f05dabc 1323 break;
1324 goto nomod;
a0d0e21e
LW		 1325 case OP_ENTERSUB:
1326 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1327 !(o->op_flags & OPf_STACKED)) {
1328 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1329 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1330 assert(cUNOPo->op_first->op_type == OP_NULL);
1331 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1332 break;
1333 }
cd06dffe
GS		 1334 else { /* lvalue subroutine call */
1335 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1336 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1337 /* Backward compatibility mode: */
1338 o->op_private |= OPpENTERSUB_INARGS;
1339 break;
1340 }
1341 else { /* Compile-time error message: */
1342 OP *kid = cUNOPo->op_first;
1343 CV *cv;
1344 OP *okid;
1345
1346 if (kid->op_type == OP_PUSHMARK)
1347 goto skip_kids;
1348 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1349 Perl_croak(aTHX_
1350 "panic: unexpected lvalue entersub "
1351 "args: type/targ %ld:%ld",
1352 (long)kid->op_type,kid->op_targ);
1353 kid = kLISTOP->op_first;
1354 skip_kids:
1355 while (kid->op_sibling)
1356 kid = kid->op_sibling;
1357 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1358 /* Indirect call */
1359 if (kid->op_type == OP_METHOD_NAMED
1360 || kid->op_type == OP_METHOD)
1361 {
349fd7b7 1362 OP *newop;
cd06dffe
GS		 1363
1364 if (kid->op_sibling || kid->op_next != kid) {
1365 yyerror("panic: unexpected optree near method call");
1366 break;
1367 }
1368
349fd7b7
GS		 1369 NewOp(1101, newop, 1, OP);
1370 newop->op_type = OP_RV2CV;
1371 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
1372 newop->op_next = newop;
1373 kid->op_sibling = newop;
1374 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1375 break;
1376 }
1377
1378 if (kid->op_type != OP_RV2CV)
1379 Perl_croak(aTHX_
1380 "panic: unexpected lvalue entersub "
1381 "entry via type/targ %ld:%ld",
1382 (long)kid->op_type,kid->op_targ);
1383 kid->op_private |= OPpLVAL_INTRO;
1384 break; /* Postpone until runtime */
1385 }
1386
1387 okid = kid;
1388 kid = kUNOP->op_first;
1389 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1390 kid = kUNOP->op_first;
1391 if (kid->op_type == OP_NULL)
1392 Perl_croak(aTHX_
1393 "Unexpected constant lvalue entersub "
1394 "entry via type/targ %ld:%ld",
1395 (long)kid->op_type,kid->op_targ);
1396 if (kid->op_type != OP_GV) {
1397 /* Restore RV2CV to check lvalueness */
1398 restore_2cv:
1399 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1400 okid->op_next = kid->op_next;
1401 kid->op_next = okid;
1402 }
1403 else
1404 okid->op_next = Nullop;
1405 okid->op_type = OP_RV2CV;
1406 okid->op_targ = 0;
1407 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1408 okid->op_private |= OPpLVAL_INTRO;
1409 break;
1410 }
1411
638eceb6 1412 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1413 if (!cv)
1414 goto restore_2cv;
1415 if (CvLVALUE(cv))
1416 break;
1417 }
1418 }
79072805
LW		 1419 /* FALL THROUGH */
1420 default:
a0d0e21e
LW		 1421 nomod:
1422 /* grep, foreach, subcalls, refgen */
1423 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1424 break;
cea2e8a9 1425 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1426 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1427 ? "do block"
1428 : (o->op_type == OP_ENTERSUB
1429 ? "non-lvalue subroutine call"
1430 : PL_op_desc[o->op_type])),
22c35a8c 1431 type ? PL_op_desc[type] : "local"));
11343788 1432 return o;
79072805 1433
a0d0e21e
LW		 1434 case OP_PREINC:
1435 case OP_PREDEC:
1436 case OP_POW:
1437 case OP_MULTIPLY:
1438 case OP_DIVIDE:
1439 case OP_MODULO:
1440 case OP_REPEAT:
1441 case OP_ADD:
1442 case OP_SUBTRACT:
1443 case OP_CONCAT:
1444 case OP_LEFT_SHIFT:
1445 case OP_RIGHT_SHIFT:
1446 case OP_BIT_AND:
1447 case OP_BIT_XOR:
1448 case OP_BIT_OR:
1449 case OP_I_MULTIPLY:
1450 case OP_I_DIVIDE:
1451 case OP_I_MODULO:
1452 case OP_I_ADD:
1453 case OP_I_SUBTRACT:
11343788 1454 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1455 goto nomod;
3280af22 1456 PL_modcount++;
a0d0e21e
LW		 1457 break;
1458
79072805 1459 case OP_COND_EXPR:
11343788 1460 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1461 mod(kid, type);
79072805
LW		 1462 break;
1463
1464 case OP_RV2AV:
1465 case OP_RV2HV:
93af7a87 1466 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1467 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1468 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1469 PL_modcount = 10000;
11343788 1470 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1471 }
1472 /* FALL THROUGH */
79072805 1473 case OP_RV2GV:
5dc0d613 1474 if (scalar_mod_type(o, type))
3fe9a6f1 1475 goto nomod;
11343788 1476 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1477 /* FALL THROUGH */
1478 case OP_AASSIGN:
1479 case OP_ASLICE:
1480 case OP_HSLICE:
93a17b20
LW		 1481 case OP_NEXTSTATE:
1482 case OP_DBSTATE:
a0d0e21e
LW		 1483 case OP_REFGEN:
1484 case OP_CHOMP:
3280af22 1485 PL_modcount = 10000;
79072805 1486 break;
463ee0b2 1487 case OP_RV2SV:
11343788 1488 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1489 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1490 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1491 /* FALL THROUGH */
79072805 1492 case OP_GV:
463ee0b2 1493 case OP_AV2ARYLEN:
3280af22 1494 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1495 case OP_SASSIGN:
bf4b1e52
GS		 1496 case OP_ANDASSIGN:
1497 case OP_ORASSIGN:
8990e307 1498 case OP_AELEMFAST:
3280af22 1499 PL_modcount++;
8990e307
LW		 1500 break;
1501
748a9306
LW		 1502 case OP_PADAV:
1503 case OP_PADHV:
3280af22 1504 PL_modcount = 10000;
5196be3e
MB		 1505 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1506 return o; /* Treat \(@foo) like ordinary list. */
1507 if (scalar_mod_type(o, type))
3fe9a6f1 1508 goto nomod;
748a9306
LW		 1509 /* FALL THROUGH */
1510 case OP_PADSV:
3280af22 1511 PL_modcount++;
748a9306 1512 if (!type)
cea2e8a9 1513 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1514 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1515 break;
1516
554b3eca 1517#ifdef USE_THREADS
2faa37cc 1518 case OP_THREADSV:
533c011a 1519 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1520 break;
1521#endif /* USE_THREADS */
1522
748a9306
LW		 1523 case OP_PUSHMARK:
1524 break;
a0d0e21e 1525
69969c6f
SB		 1526 case OP_KEYS:
1527 if (type != OP_SASSIGN)
1528 goto nomod;
5d82c453
GA		 1529 goto lvalue_func;
1530 case OP_SUBSTR:
1531 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1532 goto nomod;
5f05dabc 1533 /* FALL THROUGH */
a0d0e21e 1534 case OP_POS:
463ee0b2 1535 case OP_VEC:
5d82c453 1536 lvalue_func:
11343788
MB		 1537 pad_free(o->op_targ);
1538 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1539 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1540 if (o->op_flags & OPf_KIDS)
1541 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1542 break;
a0d0e21e 1543
463ee0b2
LW		 1544 case OP_AELEM:
1545 case OP_HELEM:
11343788 1546 ref(cBINOPo->op_first, o->op_type);
68dc0745 1547 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1548 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1549 o->op_private |= OPpLVAL_DEFER;
3280af22 1550 PL_modcount++;
463ee0b2
LW		 1551 break;
1552
1553 case OP_SCOPE:
1554 case OP_LEAVE:
1555 case OP_ENTER:
11343788
MB		 1556 if (o->op_flags & OPf_KIDS)
1557 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1558 break;
1559
1560 case OP_NULL:
638bc118
GS		 1561 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1562 goto nomod;
1563 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1564 break;
11343788
MB		 1565 if (o->op_targ != OP_LIST) {
1566 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1567 break;
1568 }
1569 /* FALL THROUGH */
463ee0b2 1570 case OP_LIST:
11343788 1571 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1572 mod(kid, type);
1573 break;
1574 }
11343788 1575 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1576
1577 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1578 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1579 else if (!type) {
11343788
MB		 1580 o->op_private |= OPpLVAL_INTRO;
1581 o->op_flags &= ~OPf_SPECIAL;
3280af22 1582 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1583 }
a0d0e21e 1584 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1585 o->op_flags |= OPf_REF;
1586 return o;
463ee0b2
LW		 1587}
1588
864dbfa3 1589STATIC bool
cea2e8a9 1590S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1591{
1592 switch (type) {
1593 case OP_SASSIGN:
5196be3e 1594 if (o->op_type == OP_RV2GV)
3fe9a6f1 1595 return FALSE;
1596 /* FALL THROUGH */
1597 case OP_PREINC:
1598 case OP_PREDEC:
1599 case OP_POSTINC:
1600 case OP_POSTDEC:
1601 case OP_I_PREINC:
1602 case OP_I_PREDEC:
1603 case OP_I_POSTINC:
1604 case OP_I_POSTDEC:
1605 case OP_POW:
1606 case OP_MULTIPLY:
1607 case OP_DIVIDE:
1608 case OP_MODULO:
1609 case OP_REPEAT:
1610 case OP_ADD:
1611 case OP_SUBTRACT:
1612 case OP_I_MULTIPLY:
1613 case OP_I_DIVIDE:
1614 case OP_I_MODULO:
1615 case OP_I_ADD:
1616 case OP_I_SUBTRACT:
1617 case OP_LEFT_SHIFT:
1618 case OP_RIGHT_SHIFT:
1619 case OP_BIT_AND:
1620 case OP_BIT_XOR:
1621 case OP_BIT_OR:
1622 case OP_CONCAT:
1623 case OP_SUBST:
1624 case OP_TRANS:
49e9fbe6
GS		 1625 case OP_READ:
1626 case OP_SYSREAD:
1627 case OP_RECV:
bf4b1e52
GS		 1628 case OP_ANDASSIGN:
1629 case OP_ORASSIGN:
3fe9a6f1 1630 return TRUE;
1631 default:
1632 return FALSE;
1633 }
1634}
1635
35cd451c 1636STATIC bool
cea2e8a9 1637S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1638{
1639 switch (o->op_type) {
1640 case OP_PIPE_OP:
1641 case OP_SOCKPAIR:
1642 if (argnum == 2)
1643 return TRUE;
1644 /* FALL THROUGH */
1645 case OP_SYSOPEN:
1646 case OP_OPEN:
ded8aa31 1647 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1648 case OP_SOCKET:
1649 case OP_OPEN_DIR:
1650 case OP_ACCEPT:
1651 if (argnum == 1)
1652 return TRUE;
1653 /* FALL THROUGH */
1654 default:
1655 return FALSE;
1656 }
1657}
1658
463ee0b2 1659OP *
864dbfa3 1660Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1661{
1662 OP *kid;
11343788
MB		 1663 if (o && o->op_flags & OPf_KIDS) {
1664 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1665 ref(kid, type);
1666 }
11343788 1667 return o;
463ee0b2
LW		 1668}
1669
1670OP *
864dbfa3 1671Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1672{
1673 OP *kid;
463ee0b2 1674
3280af22 1675 if (!o || PL_error_count)
11343788 1676 return o;
463ee0b2 1677
11343788 1678 switch (o->op_type) {
a0d0e21e 1679 case OP_ENTERSUB:
e55aaa0e 1680 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1681 !(o->op_flags & OPf_STACKED)) {
1682 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1683 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1684 assert(cUNOPo->op_first->op_type == OP_NULL);
1685 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1686 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1687 }
1688 break;
aeea060c 1689
463ee0b2 1690 case OP_COND_EXPR:
11343788 1691 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1692 ref(kid, type);
1693 break;
8990e307 1694 case OP_RV2SV:
35cd451c
GS		 1695 if (type == OP_DEFINED)
1696 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1697 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1698 /* FALL THROUGH */
1699 case OP_PADSV:
5f05dabc 1700 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1701 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1702 : type == OP_RV2HV ? OPpDEREF_HV
1703 : OPpDEREF_SV);
11343788 1704 o->op_flags |= OPf_MOD;
a0d0e21e 1705 }
8990e307
LW		 1706 break;
1707
2faa37cc 1708 case OP_THREADSV:
a863c7d1
MB		 1709 o->op_flags |= OPf_MOD; /* XXX ??? */
1710 break;
1711
463ee0b2
LW		 1712 case OP_RV2AV:
1713 case OP_RV2HV:
aeea060c 1714 o->op_flags |= OPf_REF;
8990e307 1715 /* FALL THROUGH */
463ee0b2 1716 case OP_RV2GV:
35cd451c
GS		 1717 if (type == OP_DEFINED)
1718 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1719 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1720 break;
8990e307 1721
463ee0b2
LW		 1722 case OP_PADAV:
1723 case OP_PADHV:
aeea060c 1724 o->op_flags |= OPf_REF;
79072805 1725 break;
aeea060c 1726
8990e307 1727 case OP_SCALAR:
79072805 1728 case OP_NULL:
11343788 1729 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1730 break;
11343788 1731 ref(cBINOPo->op_first, type);
79072805
LW		 1732 break;
1733 case OP_AELEM:
1734 case OP_HELEM:
11343788 1735 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1736 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1737 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1738 : type == OP_RV2HV ? OPpDEREF_HV
1739 : OPpDEREF_SV);
11343788 1740 o->op_flags |= OPf_MOD;
8990e307 1741 }
79072805
LW		 1742 break;
1743
463ee0b2 1744 case OP_SCOPE:
79072805
LW		 1745 case OP_LEAVE:
1746 case OP_ENTER:
8990e307 1747 case OP_LIST:
11343788 1748 if (!(o->op_flags & OPf_KIDS))
79072805 1749 break;
11343788 1750 ref(cLISTOPo->op_last, type);
79072805 1751 break;
a0d0e21e
LW		 1752 default:
1753 break;
79072805 1754 }
11343788 1755 return scalar(o);
8990e307 1756
79072805
LW		 1757}
1758
09bef843
SB		 1759STATIC OP *
1760S_dup_attrlist(pTHX_ OP *o)
1761{
1762 OP *rop = Nullop;
1763
1764 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1765 * where the first kid is OP_PUSHMARK and the remaining ones
1766 * are OP_CONST. We need to push the OP_CONST values.
1767 */
1768 if (o->op_type == OP_CONST)
1769 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1770 else {
1771 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1772 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1773 if (o->op_type == OP_CONST)
1774 rop = append_elem(OP_LIST, rop,
1775 newSVOP(OP_CONST, o->op_flags,
1776 SvREFCNT_inc(cSVOPo->op_sv)));
1777 }
1778 }
1779 return rop;
1780}
1781
1782STATIC void
1783S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1784{
1785 OP *modname; /* for 'use' */
1786 SV *stashsv;
1787
1788 /* fake up C<use attributes $pkg,$rv,@attrs> */
1789 ENTER; /* need to protect against side-effects of 'use' */
1790 SAVEINT(PL_expect);
1791 if (stash && HvNAME(stash))
1792 stashsv = newSVpv(HvNAME(stash), 0);
1793 else
1794 stashsv = &PL_sv_no;
1795#define ATTRSMODULE "attributes"
1796 modname = newSVOP(OP_CONST, 0,
1797 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1798 modname->op_private |= OPpCONST_BARE;
1799 /* that flag is required to make 'use' work right */
1800 utilize(1, start_subparse(FALSE, 0),
1801 Nullop, /* version */
1802 modname,
1803 prepend_elem(OP_LIST,
1804 newSVOP(OP_CONST, 0, stashsv),
1805 prepend_elem(OP_LIST,
1806 newSVOP(OP_CONST, 0, newRV(target)),
1807 dup_attrlist(attrs))));
1808 LEAVE;
1809}
1810
1811STATIC OP *
1812S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1813{
1814 OP *kid;
93a17b20
LW		 1815 I32 type;
1816
3280af22 1817 if (!o || PL_error_count)
11343788 1818 return o;
93a17b20 1819
11343788 1820 type = o->op_type;
93a17b20 1821 if (type == OP_LIST) {
11343788 1822 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1823 my_kid(kid, attrs);
dab48698 1824 } else if (type == OP_UNDEF) {
7766148a 1825 return o;
77ca0c92
LW		 1826 } else if (type == OP_RV2SV || /* "our" declaration */
1827 type == OP_RV2AV ||
1828 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
1829 return o;
dab48698 1830 } else if (type != OP_PADSV &&
93a17b20
LW		 1831 type != OP_PADAV &&
1832 type != OP_PADHV &&
1833 type != OP_PUSHMARK)
1834 {
cea2e8a9 1835 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1836 return o;
93a17b20 1837 }
09bef843
SB		 1838 else if (attrs && type != OP_PUSHMARK) {
1839 HV *stash;
1840 SV *padsv;
1841 SV **namesvp;
1842
1843 /* check for C<my Dog $spot> when deciding package */
1844 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1845 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1846 stash = SvSTASH(*namesvp);
1847 else
1848 stash = PL_curstash;
1849 padsv = PAD_SV(o->op_targ);
1850 apply_attrs(stash, padsv, attrs);
1851 }
11343788
MB		 1852 o->op_flags |= OPf_MOD;
1853 o->op_private |= OPpLVAL_INTRO;
1854 return o;
93a17b20
LW		 1855}
1856
1857OP *
09bef843
SB		 1858Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1859{
1860 if (o->op_flags & OPf_PARENS)
1861 list(o);
1862 PL_in_my = FALSE;
1863 PL_in_my_stash = Nullhv;
1864 if (attrs)
1865 SAVEFREEOP(attrs);
1866 return my_kid(o, attrs);
1867}
1868
1869OP *
1870Perl_my(pTHX_ OP *o)
1871{
1872 return my_kid(o, Nullop);
1873}
1874
1875OP *
864dbfa3 1876Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1877{
1878 if (o)
1879 o->op_flags |= OPf_PARENS;
1880 return o;
1881}
1882
1883OP *
864dbfa3 1884Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1885{
d008e5eb 1886 dTHR;
11343788 1887 OP *o;
79072805 1888
599cee73
PM		 1889 if (ckWARN(WARN_UNSAFE) &&
1890 (left->op_type == OP_RV2AV ||
1891 left->op_type == OP_RV2HV ||
1892 left->op_type == OP_PADAV ||
1893 left->op_type == OP_PADHV)) {
22c35a8c 1894 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1895 right->op_type == OP_TRANS)
1896 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1897 const char *sample = ((left->op_type == OP_RV2AV ||
1898 left->op_type == OP_PADAV)
1899 ? "@array" : "%hash");
cea2e8a9 1900 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1901 "Applying %s to %s will act on scalar(%s)",
1902 desc, sample, sample);
2ae324a7 1903 }
1904
79072805
LW		 1905 if (right->op_type == OP_MATCH ||
1906 right->op_type == OP_SUBST ||
1907 right->op_type == OP_TRANS) {
1908 right->op_flags |= OPf_STACKED;
1909 if (right->op_type != OP_MATCH)
463ee0b2 1910 left = mod(left, right->op_type);
79072805 1911 if (right->op_type == OP_TRANS)
11343788 1912 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1913 else
11343788 1914 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1915 if (type == OP_NOT)
11343788
MB		 1916 return newUNOP(OP_NOT, 0, scalar(o));
1917 return o;
79072805
LW		 1918 }
1919 else
1920 return bind_match(type, left,
1921 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1922}
1923
1924OP *
864dbfa3 1925Perl_invert(pTHX_ OP *o)
79072805 1926{
11343788
MB		 1927 if (!o)
1928 return o;
79072805 1929 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1930 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1931}
1932
1933OP *
864dbfa3 1934Perl_scope(pTHX_ OP *o)
79072805
LW		 1935{
1936 if (o) {
3280af22 1937 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1938 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1939 o->op_type = OP_LEAVE;
22c35a8c 1940 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1941 }
1942 else {
1943 if (o->op_type == OP_LINESEQ) {
1944 OP *kid;
1945 o->op_type = OP_SCOPE;
22c35a8c 1946 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1947 kid = ((LISTOP*)o)->op_first;
1948 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1949 null(kid);
463ee0b2
LW		 1950 }
1951 else
748a9306 1952 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1953 }
79072805
LW		 1954 }
1955 return o;
1956}
1957
b3ac6de7 1958void
864dbfa3 1959Perl_save_hints(pTHX)
b3ac6de7 1960{
3280af22
NIS		 1961 SAVEI32(PL_hints);
1962 SAVESPTR(GvHV(PL_hintgv));
1963 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1964 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1965}
1966
a0d0e21e 1967int
864dbfa3 1968Perl_block_start(pTHX_ int full)
79072805 1969{
11343788 1970 dTHR;
3280af22 1971 int retval = PL_savestack_ix;
b3ac6de7 1972
3280af22 1973 SAVEI32(PL_comppad_name_floor);
55497cff 1974 if (full) {
3280af22
NIS		 1975 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1976 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1977 else
3280af22
NIS		 1978 PL_comppad_name_floor = 0;
1979 }
1980 SAVEI32(PL_min_intro_pending);
1981 SAVEI32(PL_max_intro_pending);
1982 PL_min_intro_pending = 0;
1983 SAVEI32(PL_comppad_name_fill);
1984 SAVEI32(PL_padix_floor);
1985 PL_padix_floor = PL_padix;
1986 PL_pad_reset_pending = FALSE;
b3ac6de7 1987 SAVEHINTS();
3280af22 1988 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 1989 SAVESPTR(PL_compiling.cop_warnings);
0453d815 1990 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 1991 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1992 SAVEFREESV(PL_compiling.cop_warnings) ;
1993 }
1994
1995
a0d0e21e
LW		 1996 return retval;
1997}
1998
1999OP*
864dbfa3 2000Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2001{
11343788 2002 dTHR;
3280af22 2003 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2004 OP* retval = scalarseq(seq);
a0d0e21e 2005 LEAVE_SCOPE(floor);
3280af22 2006 PL_pad_reset_pending = FALSE;
e24b16f9 2007 PL_compiling.op_private = PL_hints;
a0d0e21e 2008 if (needblockscope)
3280af22
NIS		 2009 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2010 pad_leavemy(PL_comppad_name_fill);
2011 PL_cop_seqmax++;
a0d0e21e
LW		 2012 return retval;
2013}
2014
76e3520e 2015STATIC OP *
cea2e8a9 2016S_newDEFSVOP(pTHX)
54b9620d
MB		 2017{
2018#ifdef USE_THREADS
2019 OP *o = newOP(OP_THREADSV, 0);
2020 o->op_targ = find_threadsv("_");
2021 return o;
2022#else
3280af22 2023 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2024#endif /* USE_THREADS */
2025}
2026
a0d0e21e 2027void
864dbfa3 2028Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2029{
11343788 2030 dTHR;
3280af22 2031 if (PL_in_eval) {
b295d113
TH		 2032 if (PL_eval_root)
2033 return;
faef0170
HS		 2034 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2035 ((PL_in_eval & EVAL_KEEPERR)
2036 ? OPf_SPECIAL : 0), o);
3280af22 2037 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2038 PL_eval_root->op_private |= OPpREFCOUNTED;
2039 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2040 PL_eval_root->op_next = 0;
2041 peep(PL_eval_start);
a0d0e21e
LW		 2042 }
2043 else {
5dc0d613 2044 if (!o)
a0d0e21e 2045 return;
3280af22
NIS		 2046 PL_main_root = scope(sawparens(scalarvoid(o)));
2047 PL_curcop = &PL_compiling;
2048 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2049 PL_main_root->op_private |= OPpREFCOUNTED;
2050 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2051 PL_main_root->op_next = 0;
2052 peep(PL_main_start);
2053 PL_compcv = 0;
3841441e 2054
4fdae800 2055 /* Register with debugger */
84902520 2056 if (PERLDB_INTER) {
864dbfa3 2057 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2058 if (cv) {
2059 dSP;
924508f0 2060 PUSHMARK(SP);
cc49e20b 2061 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2062 PUTBACK;
864dbfa3 2063 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2064 }
2065 }
79072805 2066 }
79072805
LW		 2067}
2068
2069OP *
864dbfa3 2070Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2071{
2072 if (o->op_flags & OPf_PARENS)
2073 list(o);
8990e307 2074 else {
d008e5eb 2075 dTHR;
599cee73 2076 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2077 char *s;
834a4ddd 2078 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2079 if (*s == ';' || *s == '=')
cea2e8a9 2080 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 2081 lex ? "my" : "local");
8990e307
LW		 2082 }
2083 }
3280af22
NIS		 2084 PL_in_my = FALSE;
2085 PL_in_my_stash = Nullhv;
93a17b20
LW		 2086 if (lex)
2087 return my(o);
2088 else
463ee0b2 2089 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 2090}
2091
2092OP *
864dbfa3 2093Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2094{
2095 if (o->op_type == OP_LIST) {
554b3eca
MB		 2096 OP *o2;
2097#ifdef USE_THREADS
2faa37cc 2098 o2 = newOP(OP_THREADSV, 0);
54b9620d 2099 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2100#else
2101 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2102#endif /* USE_THREADS */
2103 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2104 }
2105 return o;
2106}
2107
2108OP *
864dbfa3 2109Perl_fold_constants(pTHX_ register OP *o)
79072805 2110{
11343788 2111 dTHR;
79072805
LW		 2112 register OP *curop;
2113 I32 type = o->op_type;
748a9306 2114 SV *sv;
79072805 2115
22c35a8c 2116 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2117 scalar(o);
b162f9ea 2118 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2119 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2120
eac055e9
GS		 2121 /* integerize op, unless it happens to be C<-foo>.
2122 * XXX should pp_i_negate() do magic string negation instead? */
2123 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2124 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2125 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2126 {
22c35a8c 2127 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2128 }
85e6fe83 2129
22c35a8c 2130 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2131 goto nope;
2132
de939608 2133 switch (type) {
7a52d87a
GS		 2134 case OP_NEGATE:
2135 /* XXX might want a ck_negate() for this */
2136 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2137 break;
de939608
CS		 2138 case OP_SPRINTF:
2139 case OP_UCFIRST:
2140 case OP_LCFIRST:
2141 case OP_UC:
2142 case OP_LC:
69dcf70c
MB		 2143 case OP_SLT:
2144 case OP_SGT:
2145 case OP_SLE:
2146 case OP_SGE:
2147 case OP_SCMP:
2148
de939608
CS		 2149 if (o->op_private & OPpLOCALE)
2150 goto nope;
2151 }
2152
3280af22 2153 if (PL_error_count)
a0d0e21e
LW		 2154 goto nope; /* Don't try to run w/ errors */
2155
79072805 2156 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2157 if ((curop->op_type != OP_CONST ||
2158 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2159 curop->op_type != OP_LIST &&
2160 curop->op_type != OP_SCALAR &&
2161 curop->op_type != OP_NULL &&
2162 curop->op_type != OP_PUSHMARK)
2163 {
79072805
LW		 2164 goto nope;
2165 }
2166 }
2167
2168 curop = LINKLIST(o);
2169 o->op_next = 0;
533c011a 2170 PL_op = curop;
cea2e8a9 2171 CALLRUNOPS(aTHX);
3280af22 2172 sv = *(PL_stack_sp--);
748a9306 2173 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2174 pad_swipe(o->op_targ);
748a9306
LW		 2175 else if (SvTEMP(sv)) { /* grab mortal temp? */
2176 (void)SvREFCNT_inc(sv);
2177 SvTEMP_off(sv);
85e6fe83 2178 }
79072805
LW		 2179 op_free(o);
2180 if (type == OP_RV2GV)
b1cb66bf 2181 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2182 else {
ee580363
GS		 2183 /* try to smush double to int, but don't smush -2.0 to -2 */
2184 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2185 type != OP_NEGATE)
2186 {
748a9306 2187 IV iv = SvIV(sv);
65202027 2188 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2189 SvREFCNT_dec(sv);
2190 sv = newSViv(iv);
2191 }
b1cb66bf 2192 else
2193 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2194 }
2195 return newSVOP(OP_CONST, 0, sv);
2196 }
aeea060c 2197
79072805 2198 nope:
22c35a8c 2199 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2200 return o;
79072805 2201
3280af22 2202 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2203 if (type == OP_MODULO
2204 || type == OP_DIVIDE
2205 || !(o->op_flags & OPf_KIDS))
2206 {
85e6fe83 2207 return o;
4bb9f687 2208 }
85e6fe83
LW		 2209
2210 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2211 if (curop->op_type == OP_CONST) {
b1cb66bf 2212 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2213 continue;
2214 return o;
2215 }
22c35a8c 2216 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2217 continue;
2218 return o;
2219 }
22c35a8c 2220 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2221 }
2222
79072805
LW		 2223 return o;
2224}
2225
2226OP *
864dbfa3 2227Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2228{
11343788 2229 dTHR;
79072805 2230 register OP *curop;
3280af22 2231 I32 oldtmps_floor = PL_tmps_floor;
79072805 2232
a0d0e21e 2233 list(o);
3280af22 2234 if (PL_error_count)
a0d0e21e
LW		 2235 return o; /* Don't attempt to run with errors */
2236
533c011a 2237 PL_op = curop = LINKLIST(o);
a0d0e21e 2238 o->op_next = 0;
cea2e8a9
GS		 2239 pp_pushmark();
2240 CALLRUNOPS(aTHX);
533c011a 2241 PL_op = curop;
cea2e8a9 2242 pp_anonlist();
3280af22 2243 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2244
2245 o->op_type = OP_RV2AV;
22c35a8c 2246 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2247 curop = ((UNOP*)o)->op_first;
3280af22 2248 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2249 op_free(curop);
79072805
LW		 2250 linklist(o);
2251 return list(o);
2252}
2253
2254OP *
864dbfa3 2255Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2256{
2257 OP *kid;
a0d0e21e 2258 OP *last = 0;
79072805 2259
11343788
MB		 2260 if (!o || o->op_type != OP_LIST)
2261 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2262 else
5dc0d613 2263 o->op_flags &= ~OPf_WANT;
79072805 2264
22c35a8c 2265 if (!(PL_opargs[type] & OA_MARK))
11343788 2266 null(cLISTOPo->op_first);
8990e307 2267
11343788 2268 o->op_type = type;
22c35a8c 2269 o->op_ppaddr = PL_ppaddr[type];
11343788 2270 o->op_flags |= flags;
79072805 2271
11343788
MB		 2272 o = CHECKOP(type, o);
2273 if (o->op_type != type)
2274 return o;
79072805 2275
11343788 2276 if (cLISTOPo->op_children < 7) {
79072805 2277 /* XXX do we really need to do this if we're done appending?? */
11343788 2278 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2279 last = kid;
11343788 2280 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2281 }
2282
11343788 2283 return fold_constants(o);
79072805
LW		 2284}
2285
2286/* List constructors */
2287
2288OP *
864dbfa3 2289Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2290{
2291 if (!first)
2292 return last;
8990e307
LW		 2293
2294 if (!last)
79072805 2295 return first;
8990e307 2296
a0d0e21e
LW		 2297 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2298 return newLISTOP(type, 0, first, last);
79072805 2299
a0d0e21e
LW		 2300 if (first->op_flags & OPf_KIDS)
2301 ((LISTOP*)first)->op_last->op_sibling = last;
2302 else {
2303 first->op_flags |= OPf_KIDS;
2304 ((LISTOP*)first)->op_first = last;
2305 }
2306 ((LISTOP*)first)->op_last = last;
2307 ((LISTOP*)first)->op_children++;
2308 return first;
79072805
LW		 2309}
2310
2311OP *
864dbfa3 2312Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2313{
2314 if (!first)
2315 return (OP*)last;
8990e307
LW		 2316
2317 if (!last)
79072805 2318 return (OP*)first;
8990e307
LW		 2319
2320 if (first->op_type != type)
79072805 2321 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2322
2323 if (last->op_type != type)
79072805
LW		 2324 return append_elem(type, (OP*)first, (OP*)last);
2325
2326 first->op_last->op_sibling = last->op_first;
2327 first->op_last = last->op_last;
2328 first->op_children += last->op_children;
2329 if (first->op_children)
acb74605 2330 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2331
2332#ifdef PL_OP_SLAB_ALLOC
2333#else
2334 Safefree(last);
2335#endif
79072805
LW		 2336 return (OP*)first;
2337}
2338
2339OP *
864dbfa3 2340Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2341{
2342 if (!first)
2343 return last;
8990e307
LW		 2344
2345 if (!last)
79072805 2346 return first;
8990e307
LW		 2347
2348 if (last->op_type == type) {
2349 if (type == OP_LIST) { /* already a PUSHMARK there */
2350 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2351 ((LISTOP*)last)->op_first->op_sibling = first;
2352 }
2353 else {
2354 if (!(last->op_flags & OPf_KIDS)) {
2355 ((LISTOP*)last)->op_last = first;
2356 last->op_flags |= OPf_KIDS;
2357 }
2358 first->op_sibling = ((LISTOP*)last)->op_first;
2359 ((LISTOP*)last)->op_first = first;
79072805 2360 }
79072805
LW		 2361 ((LISTOP*)last)->op_children++;
2362 return last;
2363 }
2364
2365 return newLISTOP(type, 0, first, last);
2366}
2367
2368/* Constructors */
2369
2370OP *
864dbfa3 2371Perl_newNULLLIST(pTHX)
79072805 2372{
8990e307
LW		 2373 return newOP(OP_STUB, 0);
2374}
2375
2376OP *
864dbfa3 2377Perl_force_list(pTHX_ OP *o)
8990e307 2378{
11343788
MB		 2379 if (!o || o->op_type != OP_LIST)
2380 o = newLISTOP(OP_LIST, 0, o, Nullop);
2381 null(o);
2382 return o;
79072805
LW		 2383}
2384
2385OP *
864dbfa3 2386Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2387{
2388 LISTOP *listop;
2389
b7dc083c 2390 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2391
2392 listop->op_type = type;
22c35a8c 2393 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2394 listop->op_children = (first != 0) + (last != 0);
2395 listop->op_flags = flags;
79072805
LW		 2396
2397 if (!last && first)
2398 last = first;
2399 else if (!first && last)
2400 first = last;
8990e307
LW		 2401 else if (first)
2402 first->op_sibling = last;
79072805
LW		 2403 listop->op_first = first;
2404 listop->op_last = last;
8990e307
LW		 2405 if (type == OP_LIST) {
2406 OP* pushop;
2407 pushop = newOP(OP_PUSHMARK, 0);
2408 pushop->op_sibling = first;
2409 listop->op_first = pushop;
2410 listop->op_flags |= OPf_KIDS;
2411 if (!last)
2412 listop->op_last = pushop;
2413 }
2414 else if (listop->op_children)
2415 listop->op_flags |= OPf_KIDS;
79072805
LW		 2416
2417 return (OP*)listop;
2418}
2419
2420OP *
864dbfa3 2421Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2422{
11343788 2423 OP *o;
b7dc083c 2424 NewOp(1101, o, 1, OP);
11343788 2425 o->op_type = type;
22c35a8c 2426 o->op_ppaddr = PL_ppaddr[type];
11343788 2427 o->op_flags = flags;
79072805 2428
11343788
MB		 2429 o->op_next = o;
2430 o->op_private = 0 + (flags >> 8);
22c35a8c 2431 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2432 scalar(o);
22c35a8c 2433 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2434 o->op_targ = pad_alloc(type, SVs_PADTMP);
2435 return CHECKOP(type, o);
79072805
LW		 2436}
2437
2438OP *
864dbfa3 2439Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2440{
2441 UNOP *unop;
2442
93a17b20 2443 if (!first)
aeea060c 2444 first = newOP(OP_STUB, 0);
22c35a8c 2445 if (PL_opargs[type] & OA_MARK)
8990e307 2446 first = force_list(first);
93a17b20 2447
b7dc083c 2448 NewOp(1101, unop, 1, UNOP);
79072805 2449 unop->op_type = type;
22c35a8c 2450 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2451 unop->op_first = first;
2452 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2453 unop->op_private = 1 | (flags >> 8);
e50aee73 2454 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2455 if (unop->op_next)
2456 return (OP*)unop;
2457
a0d0e21e 2458 return fold_constants((OP *) unop);
79072805
LW		 2459}
2460
2461OP *
864dbfa3 2462Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2463{
2464 BINOP *binop;
b7dc083c 2465 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2466
2467 if (!first)
2468 first = newOP(OP_NULL, 0);
2469
2470 binop->op_type = type;
22c35a8c 2471 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2472 binop->op_first = first;
2473 binop->op_flags = flags | OPf_KIDS;
2474 if (!last) {
2475 last = first;
c07a80fd 2476 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2477 }
2478 else {
c07a80fd 2479 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2480 first->op_sibling = last;
2481 }
2482
e50aee73 2483 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2484 if (binop->op_next || binop->op_type != type)
79072805
LW		 2485 return (OP*)binop;
2486
7284ab6f 2487 binop->op_last = binop->op_first->op_sibling;
79072805 2488
a0d0e21e 2489 return fold_constants((OP *)binop);
79072805
LW		 2490}
2491
a0ed51b3
LW		 2492static int
2493utf8compare(const void *a, const void *b)
2494{
2495 int i;
2496 for (i = 0; i < 10; i++) {
2497 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2498 return -1;
2499 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2500 return 1;
2501 }
2502 return 0;
2503}
2504
79072805 2505OP *
864dbfa3 2506Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2507{
79072805
LW		 2508 SV *tstr = ((SVOP*)expr)->op_sv;
2509 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2510 STRLEN tlen;
2511 STRLEN rlen;
ec49126f 2512 register U8 *t = (U8*)SvPV(tstr, tlen);
2513 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2514 register I32 i;
2515 register I32 j;
a0ed51b3 2516 I32 del;
79072805 2517 I32 complement;
5d06d08e 2518 I32 squash;
79072805
LW		 2519 register short *tbl;
2520
11343788 2521 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2522 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2523 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2524
a0ed51b3 2525 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2526 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2527 SV* transv = 0;
2528 U8* tend = t + tlen;
2529 U8* rend = r + rlen;
2530 I32 ulen;
2531 U32 tfirst = 1;
2532 U32 tlast = 0;
2533 I32 tdiff;
2534 U32 rfirst = 1;
2535 U32 rlast = 0;
2536 I32 rdiff;
2537 I32 diff;
2538 I32 none = 0;
2539 U32 max = 0;
2540 I32 bits;
2541 I32 grows = 0;
2542 I32 havefinal = 0;
2543 U32 final;
2544 HV *hv;
2545 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2546 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2547
2548 if (complement) {
2549 U8 tmpbuf[10];
2550 U8** cp;
2551 UV nextmin = 0;
2552 New(1109, cp, tlen, U8*);
2553 i = 0;
79cb57f6 2554 transv = newSVpvn("",0);
a0ed51b3
LW		 2555 while (t < tend) {
2556 cp[i++] = t;
2557 t += UTF8SKIP(t);
2558 if (*t == 0xff) {
2559 t++;
2560 t += UTF8SKIP(t);
2561 }
2562 }
2563 qsort(cp, i, sizeof(U8*), utf8compare);
2564 for (j = 0; j < i; j++) {
2565 U8 *s = cp[j];
2566 UV val = utf8_to_uv(s, &ulen);
2567 s += ulen;
2568 diff = val - nextmin;
2569 if (diff > 0) {
2570 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2571 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2572 if (diff > 1) {
2573 t = uv_to_utf8(tmpbuf, val - 1);
2574 sv_catpvn(transv, "\377", 1);
dfe13c55 2575 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2576 }
2577 }
2578 if (*s == 0xff)
2579 val = utf8_to_uv(s+1, &ulen);
2580 if (val >= nextmin)
2581 nextmin = val + 1;
2582 }
2583 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2584 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2585 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2586 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2587 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2588 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2589 tlen = SvCUR(transv);
2590 tend = t + tlen;
2591 }
2592 else if (!rlen && !del) {
2593 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2594 }
2595 if (!squash) {
2596 if (to_utf && from_utf) { /* only counting characters */
2597 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2598 o->op_private |= OPpTRANS_IDENTICAL;
2599 }
2600 else { /* straight latin-1 translation */
2601 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2602 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2603 o->op_private |= OPpTRANS_IDENTICAL;
2604 }
a0ed51b3
LW		 2605 }
2606
2607 while (t < tend || tfirst <= tlast) {
2608 /* see if we need more "t" chars */
2609 if (tfirst > tlast) {
2610 tfirst = (I32)utf8_to_uv(t, &ulen);
2611 t += ulen;
2612 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2613 tlast = (I32)utf8_to_uv(++t, &ulen);
2614 t += ulen;
2615 }
2616 else
2617 tlast = tfirst;
2618 }
2619
2620 /* now see if we need more "r" chars */
2621 if (rfirst > rlast) {
2622 if (r < rend) {
2623 rfirst = (I32)utf8_to_uv(r, &ulen);
2624 r += ulen;
2625 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2626 rlast = (I32)utf8_to_uv(++r, &ulen);
2627 r += ulen;
2628 }
2629 else
2630 rlast = rfirst;
2631 }
2632 else {
2633 if (!havefinal++)
2634 final = rlast;
2635 rfirst = rlast = 0xffffffff;
2636 }
2637 }
2638
2639 /* now see which range will peter our first, if either. */
2640 tdiff = tlast - tfirst;
2641 rdiff = rlast - rfirst;
2642
2643 if (tdiff <= rdiff)
2644 diff = tdiff;
2645 else
2646 diff = rdiff;
2647
2648 if (rfirst == 0xffffffff) {
2649 diff = tdiff; /* oops, pretend rdiff is infinite */
2650 if (diff > 0)
cea2e8a9 2651 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
a0ed51b3 2652 else
cea2e8a9 2653 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\tXXXX\n", tfirst);
a0ed51b3
LW		 2654 }
2655 else {
2656 if (diff > 0)
cea2e8a9 2657 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
a0ed51b3 2658 else
cea2e8a9 2659 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\t%04x\n", tfirst, rfirst);
a0ed51b3
LW		 2660
2661 if (rfirst + diff > max)
2662 max = rfirst + diff;
2663 rfirst += diff + 1;
2664 if (!grows) {
2665 if (rfirst <= 0x80)
2666 ;
2667 else if (rfirst <= 0x800)
2668 grows |= (tfirst < 0x80);
2669 else if (rfirst <= 0x10000)
2670 grows |= (tfirst < 0x800);
2671 else if (rfirst <= 0x200000)
2672 grows |= (tfirst < 0x10000);
2673 else if (rfirst <= 0x4000000)
2674 grows |= (tfirst < 0x200000);
2675 else if (rfirst <= 0x80000000)
2676 grows |= (tfirst < 0x4000000);
2677 }
2678 }
2679 tfirst += diff + 1;
2680 }
2681
2682 none = ++max;
2683 if (del)
2684 del = ++max;
2685
2686 if (max > 0xffff)
2687 bits = 32;
2688 else if (max > 0xff)
2689 bits = 16;
2690 else
2691 bits = 8;
2692
2693 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2694 SvREFCNT_dec(listsv);
2695 if (transv)
2696 SvREFCNT_dec(transv);
2697
2698 if (!del && havefinal)
2699 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2700
2701 if (grows && to_utf)
2702 o->op_private |= OPpTRANS_GROWS;
2703
2704 op_free(expr);
2705 op_free(repl);
2706 return o;
2707 }
2708
2709 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2710 if (complement) {
2711 Zero(tbl, 256, short);
2712 for (i = 0; i < tlen; i++)
ec49126f 2713 tbl[t[i]] = -1;
79072805
LW		 2714 for (i = 0, j = 0; i < 256; i++) {
2715 if (!tbl[i]) {
2716 if (j >= rlen) {
a0ed51b3 2717 if (del)
79072805
LW		 2718 tbl[i] = -2;
2719 else if (rlen)
ec49126f 2720 tbl[i] = r[j-1];
79072805
LW		 2721 else
2722 tbl[i] = i;
2723 }
2724 else
ec49126f 2725 tbl[i] = r[j++];
79072805
LW		 2726 }
2727 }
2728 }
2729 else {
a0ed51b3 2730 if (!rlen && !del) {
79072805 2731 r = t; rlen = tlen;
5d06d08e 2732 if (!squash)
4757a243 2733 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2734 }
2735 for (i = 0; i < 256; i++)
2736 tbl[i] = -1;
2737 for (i = 0, j = 0; i < tlen; i++,j++) {
2738 if (j >= rlen) {
a0ed51b3 2739 if (del) {
ec49126f 2740 if (tbl[t[i]] == -1)
2741 tbl[t[i]] = -2;
79072805
LW		 2742 continue;
2743 }
2744 --j;
2745 }
ec49126f 2746 if (tbl[t[i]] == -1)
2747 tbl[t[i]] = r[j];
79072805
LW		 2748 }
2749 }
2750 op_free(expr);
2751 op_free(repl);
2752
11343788 2753 return o;
79072805
LW		 2754}
2755
2756OP *
864dbfa3 2757Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2758{
11343788 2759 dTHR;
79072805
LW		 2760 PMOP *pmop;
2761
b7dc083c 2762 NewOp(1101, pmop, 1, PMOP);
79072805 2763 pmop->op_type = type;
22c35a8c 2764 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2765 pmop->op_flags = flags;
c07a80fd 2766 pmop->op_private = 0 | (flags >> 8);
79072805 2767
3280af22 2768 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2769 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2770 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2771 pmop->op_pmpermflags |= PMf_LOCALE;
2772 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2773
79072805 2774 /* link into pm list */
3280af22
NIS		 2775 if (type != OP_TRANS && PL_curstash) {
2776 pmop->op_pmnext = HvPMROOT(PL_curstash);
2777 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2778 }
2779
2780 return (OP*)pmop;
2781}
2782
2783OP *
864dbfa3 2784Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2785{
5c0ca799 2786 dTHR;
79072805
LW		 2787 PMOP *pm;
2788 LOGOP *rcop;
ce862d02 2789 I32 repl_has_vars = 0;
79072805 2790
11343788
MB		 2791 if (o->op_type == OP_TRANS)
2792 return pmtrans(o, expr, repl);
79072805 2793
3280af22 2794 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2795 pm = (PMOP*)o;
79072805
LW		 2796
2797 if (expr->op_type == OP_CONST) {
463ee0b2 2798 STRLEN plen;
79072805 2799 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2800 char *p = SvPV(pat, plen);
11343788 2801 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2802 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2803 p = SvPV(pat, plen);
79072805
LW		 2804 pm->op_pmflags |= PMf_SKIPWHITE;
2805 }
cea2e8a9 2806 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2807 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2808 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2809 op_free(expr);
2810 }
2811 else {
3280af22
NIS		 2812 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2813 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2814 ? OP_REGCRESET
2815 : OP_REGCMAYBE),0,expr);
463ee0b2 2816
b7dc083c 2817 NewOp(1101, rcop, 1, LOGOP);
79072805 2818 rcop->op_type = OP_REGCOMP;
22c35a8c 2819 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2820 rcop->op_first = scalar(expr);
3280af22 2821 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2822 ? (OPf_SPECIAL | OPf_KIDS)
2823 : OPf_KIDS);
79072805 2824 rcop->op_private = 1;
11343788 2825 rcop->op_other = o;
79072805
LW		 2826
2827 /* establish postfix order */
3280af22 2828 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2829 LINKLIST(expr);
2830 rcop->op_next = expr;
2831 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2832 }
2833 else {
2834 rcop->op_next = LINKLIST(expr);
2835 expr->op_next = (OP*)rcop;
2836 }
79072805 2837
11343788 2838 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2839 }
2840
2841 if (repl) {
748a9306 2842 OP *curop;
0244c3a4 2843 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2844 curop = 0;
57843af0
GS		 2845 if (CopLINE(PL_curcop) < PL_multi_end)
2846 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2847 }
554b3eca 2848#ifdef USE_THREADS
2faa37cc 2849 else if (repl->op_type == OP_THREADSV
554b3eca 2850 && strchr("&`'123456789+",
533c011a 2851 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2852 {
2853 curop = 0;
2854 }
2855#endif /* USE_THREADS */
748a9306
LW		 2856 else if (repl->op_type == OP_CONST)
2857 curop = repl;
79072805 2858 else {
79072805
LW		 2859 OP *lastop = 0;
2860 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2861 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2862#ifdef USE_THREADS
ce862d02
IZ		 2863 if (curop->op_type == OP_THREADSV) {
2864 repl_has_vars = 1;
be949f6f 2865 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2866 break;
554b3eca
MB		 2867 }
2868#else
79072805 2869 if (curop->op_type == OP_GV) {
638eceb6 2870 GV *gv = cGVOPx_gv(curop);
ce862d02 2871 repl_has_vars = 1;
93a17b20 2872 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2873 break;
2874 }
554b3eca 2875#endif /* USE_THREADS */
79072805
LW		 2876 else if (curop->op_type == OP_RV2CV)
2877 break;
2878 else if (curop->op_type == OP_RV2SV ||
2879 curop->op_type == OP_RV2AV ||
2880 curop->op_type == OP_RV2HV ||
2881 curop->op_type == OP_RV2GV) {
2882 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2883 break;
2884 }
748a9306
LW		 2885 else if (curop->op_type == OP_PADSV ||
2886 curop->op_type == OP_PADAV ||
2887 curop->op_type == OP_PADHV ||
554b3eca 2888 curop->op_type == OP_PADANY) {
ce862d02 2889 repl_has_vars = 1;
748a9306 2890 }
1167e5da
SM		 2891 else if (curop->op_type == OP_PUSHRE)
2892 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2893 else
2894 break;
2895 }
2896 lastop = curop;
2897 }
748a9306 2898 }
ce862d02
IZ		 2899 if (curop == repl
2900 && !(repl_has_vars
2901 && (!pm->op_pmregexp
2902 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2903 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2904 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2905 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2906 }
2907 else {
ce862d02
IZ		 2908 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2909 pm->op_pmflags |= PMf_MAYBE_CONST;
2910 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2911 }
b7dc083c 2912 NewOp(1101, rcop, 1, LOGOP);
748a9306 2913 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2914 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2915 rcop->op_first = scalar(repl);
2916 rcop->op_flags |= OPf_KIDS;
2917 rcop->op_private = 1;
11343788 2918 rcop->op_other = o;
748a9306
LW		 2919
2920 /* establish postfix order */
2921 rcop->op_next = LINKLIST(repl);
2922 repl->op_next = (OP*)rcop;
2923
2924 pm->op_pmreplroot = scalar((OP*)rcop);
2925 pm->op_pmreplstart = LINKLIST(rcop);
2926 rcop->op_next = 0;
79072805
LW		 2927 }
2928 }
2929
2930 return (OP*)pm;
2931}
2932
2933OP *
864dbfa3 2934Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2935{
2936 SVOP *svop;
b7dc083c 2937 NewOp(1101, svop, 1, SVOP);
79072805 2938 svop->op_type = type;
22c35a8c 2939 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2940 svop->op_sv = sv;
2941 svop->op_next = (OP*)svop;
2942 svop->op_flags = flags;
22c35a8c 2943 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2944 scalar((OP*)svop);
22c35a8c 2945 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2946 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2947 return CHECKOP(type, svop);
79072805
LW		 2948}
2949
2950OP *
350de78d
GS		 2951Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
2952{
2953 PADOP *padop;
2954 NewOp(1101, padop, 1, PADOP);
2955 padop->op_type = type;
2956 padop->op_ppaddr = PL_ppaddr[type];
2957 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 2958 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 2959 PL_curpad[padop->op_padix] = sv;
7766f137 2960 SvPADTMP_on(sv);
350de78d
GS		 2961 padop->op_next = (OP*)padop;
2962 padop->op_flags = flags;
2963 if (PL_opargs[type] & OA_RETSCALAR)
2964 scalar((OP*)padop);
2965 if (PL_opargs[type] & OA_TARGET)
2966 padop->op_targ = pad_alloc(type, SVs_PADTMP);
2967 return CHECKOP(type, padop);
2968}
2969
2970OP *
864dbfa3 2971Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 2972{
11343788 2973 dTHR;
350de78d 2974#ifdef USE_ITHREADS
743e66e6 2975 GvIN_PAD_on(gv);
350de78d
GS		 2976 return newPADOP(type, flags, SvREFCNT_inc(gv));
2977#else
7934575e 2978 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 2979#endif
79072805
LW		 2980}
2981
2982OP *
864dbfa3 2983Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 2984{
2985 PVOP *pvop;
b7dc083c 2986 NewOp(1101, pvop, 1, PVOP);
79072805 2987 pvop->op_type = type;
22c35a8c 2988 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2989 pvop->op_pv = pv;
2990 pvop->op_next = (OP*)pvop;
2991 pvop->op_flags = flags;
22c35a8c 2992 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2993 scalar((OP*)pvop);
22c35a8c 2994 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2995 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2996 return CHECKOP(type, pvop);
79072805
LW		 2997}
2998
79072805 2999void
864dbfa3 3000Perl_package(pTHX_ OP *o)
79072805 3001{
11343788 3002 dTHR;
93a17b20 3003 SV *sv;
79072805 3004
3280af22
NIS		 3005 save_hptr(&PL_curstash);
3006 save_item(PL_curstname);
11343788 3007 if (o) {
463ee0b2
LW		 3008 STRLEN len;
3009 char *name;
11343788 3010 sv = cSVOPo->op_sv;
463ee0b2 3011 name = SvPV(sv, len);
3280af22
NIS		 3012 PL_curstash = gv_stashpvn(name,len,TRUE);
3013 sv_setpvn(PL_curstname, name, len);
11343788 3014 op_free(o);
93a17b20
LW		 3015 }
3016 else {
3280af22
NIS		 3017 sv_setpv(PL_curstname,"<none>");
3018 PL_curstash = Nullhv;
93a17b20 3019 }
7ad382f4 3020 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3021 PL_copline = NOLINE;
3022 PL_expect = XSTATE;
79072805
LW		 3023}
3024
85e6fe83 3025void
864dbfa3 3026Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3027{
a0d0e21e
LW		 3028 OP *pack;
3029 OP *meth;
3030 OP *rqop;
3031 OP *imop;
b1cb66bf 3032 OP *veop;
78ca652e 3033 GV *gv;
85e6fe83 3034
a0d0e21e 3035 if (id->op_type != OP_CONST)
cea2e8a9 3036 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3037
b1cb66bf 3038 veop = Nullop;
3039
3040 if(version != Nullop) {
3041 SV *vesv = ((SVOP*)version)->op_sv;
3042
3043 if (arg == Nullop && !SvNIOK(vesv)) {
3044 arg = version;
3045 }
3046 else {
3047 OP *pack;
b1cb66bf 3048
3049 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 3050 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3051
3052 /* Make copy of id so we don't free it twice */
3053 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3054
3055 /* Fake up a method call to VERSION */
b1cb66bf 3056 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3057 append_elem(OP_LIST,
3058 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 3059 newSVOP(OP_METHOD_NAMED, 0,
3060 newSVpvn("VERSION", 7))));
b1cb66bf 3061 }
3062 }
aeea060c 3063
a0d0e21e 3064 /* Fake up an import/unimport */
4633a7c4
LW		 3065 if (arg && arg->op_type == OP_STUB)
3066 imop = arg; /* no import on explicit () */
b1cb66bf 3067 else if(SvNIOK(((SVOP*)id)->op_sv)) {
3068 imop = Nullop; /* use 5.0; */
3069 }
4633a7c4
LW		 3070 else {
3071 /* Make copy of id so we don't free it twice */
3072 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 3073 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 3074 append_elem(OP_LIST,
3075 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 3076 newSVOP(OP_METHOD_NAMED, 0,
3077 aver ? newSVpvn("import", 6)
3078 : newSVpvn("unimport", 8))));
4633a7c4
LW		 3079 }
3080
78ca652e
GS		 3081 /* Fake up a require, handle override, if any */
3082 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3083 if (!(gv && GvIMPORTED_CV(gv)))
3084 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3085
3086 if (gv && GvIMPORTED_CV(gv)) {
3087 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3088 append_elem(OP_LIST, id,
3089 scalar(newUNOP(OP_RV2CV, 0,
3090 newGVOP(OP_GV, 0,
3091 gv))))));
3092 }
3093 else {
3094 rqop = newUNOP(OP_REQUIRE, 0, id);
3095 }
a0d0e21e
LW		 3096
3097 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3098 newATTRSUB(floor,
79cb57f6 3099 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3100 Nullop,
09bef843 3101 Nullop,
a0d0e21e 3102 append_elem(OP_LINESEQ,
b1cb66bf 3103 append_elem(OP_LINESEQ,
3104 newSTATEOP(0, Nullch, rqop),
3105 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3106 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3107
c305c6a0 3108 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3109 PL_copline = NOLINE;
3110 PL_expect = XSTATE;
85e6fe83
LW		 3111}
3112
79072805 3113OP *
864dbfa3 3114Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3115{
3116 OP *doop;
3117 GV *gv;
3118
3119 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3120 if (!(gv && GvIMPORTED_CV(gv)))
3121 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3122
3123 if (gv && GvIMPORTED_CV(gv)) {
3124 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3125 append_elem(OP_LIST, term,
3126 scalar(newUNOP(OP_RV2CV, 0,
3127 newGVOP(OP_GV, 0,
3128 gv))))));
3129 }
3130 else {
3131 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3132 }
3133 return doop;
3134}
3135
3136OP *
864dbfa3 3137Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3138{
3139 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3140 list(force_list(subscript)),
3141 list(force_list(listval)) );
79072805
LW		 3142}
3143
76e3520e 3144STATIC I32
cea2e8a9 3145S_list_assignment(pTHX_ register OP *o)
79072805 3146{
11343788 3147 if (!o)
79072805
LW		 3148 return TRUE;
3149
11343788
MB		 3150 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3151 o = cUNOPo->op_first;
79072805 3152
11343788 3153 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3154 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3155 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3156
3157 if (t && f)
3158 return TRUE;
3159 if (t || f)
3160 yyerror("Assignment to both a list and a scalar");
3161 return FALSE;
3162 }
3163
11343788
MB		 3164 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3165 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3166 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3167 return TRUE;
3168
11343788 3169 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3170 return TRUE;
3171
11343788 3172 if (o->op_type == OP_RV2SV)
79072805
LW		 3173 return FALSE;
3174
3175 return FALSE;
3176}
3177
3178OP *
864dbfa3 3179Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3180{
11343788 3181 OP *o;
79072805 3182
a0d0e21e
LW		 3183 if (optype) {
3184 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3185 return newLOGOP(optype, 0,
3186 mod(scalar(left), optype),
3187 newUNOP(OP_SASSIGN, 0, scalar(right)));
3188 }
3189 else {
3190 return newBINOP(optype, OPf_STACKED,
3191 mod(scalar(left), optype), scalar(right));
3192 }
3193 }
3194
79072805 3195 if (list_assignment(left)) {
6ee623d5 3196 dTHR;
3280af22
NIS		 3197 PL_modcount = 0;
3198 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3199 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3200 if (PL_eval_start)
3201 PL_eval_start = 0;
748a9306 3202 else {
a0d0e21e
LW		 3203 op_free(left);
3204 op_free(right);
3205 return Nullop;
3206 }
11343788 3207 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3208 list(force_list(right)),
3209 list(force_list(left)) );
11343788 3210 o->op_private = 0 | (flags >> 8);
a0d0e21e 3211 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3212 OP *curop;
11343788 3213 OP *lastop = o;
3280af22 3214 PL_generation++;
11343788 3215 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3216 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3217 if (curop->op_type == OP_GV) {
638eceb6 3218 GV *gv = cGVOPx_gv(curop);
3280af22 3219 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3220 break;
3280af22 3221 SvCUR(gv) = PL_generation;
79072805 3222 }
748a9306
LW		 3223 else if (curop->op_type == OP_PADSV ||
3224 curop->op_type == OP_PADAV ||
3225 curop->op_type == OP_PADHV ||
3226 curop->op_type == OP_PADANY) {
3280af22 3227 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3228 SV *sv = svp[curop->op_targ];
3280af22 3229 if (SvCUR(sv) == PL_generation)
748a9306 3230 break;
3280af22 3231 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3232 }
79072805
LW		 3233 else if (curop->op_type == OP_RV2CV)
3234 break;
3235 else if (curop->op_type == OP_RV2SV ||
3236 curop->op_type == OP_RV2AV ||
3237 curop->op_type == OP_RV2HV ||
3238 curop->op_type == OP_RV2GV) {
3239 if (lastop->op_type != OP_GV) /* funny deref? */
3240 break;
3241 }
1167e5da
SM		 3242 else if (curop->op_type == OP_PUSHRE) {
3243 if (((PMOP*)curop)->op_pmreplroot) {
3244 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3245 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3246 break;
3280af22 3247 SvCUR(gv) = PL_generation;
1167e5da
SM		 3248 }
3249 }
79072805
LW		 3250 else
3251 break;
3252 }
3253 lastop = curop;
3254 }
11343788
MB		 3255 if (curop != o)
3256 o->op_private = OPpASSIGN_COMMON;
79072805 3257 }
c07a80fd 3258 if (right && right->op_type == OP_SPLIT) {
3259 OP* tmpop;
3260 if ((tmpop = ((LISTOP*)right)->op_first) &&
3261 tmpop->op_type == OP_PUSHRE)
3262 {
3263 PMOP *pm = (PMOP*)tmpop;
3264 if (left->op_type == OP_RV2AV &&
3265 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3266 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3267 {
3268 tmpop = ((UNOP*)left)->op_first;
3269 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3270#ifdef USE_ITHREADS
3271 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3272 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3273#else
3274 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3275 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3276#endif
c07a80fd 3277 pm->op_pmflags |= PMf_ONCE;
11343788 3278 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3279 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3280 tmpop->op_sibling = Nullop; /* don't free split */
3281 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3282 op_free(o); /* blow off assign */
54310121 3283 right->op_flags &= ~OPf_WANT;
a5f75d66 3284 /* "I don't know and I don't care." */
c07a80fd 3285 return right;
3286 }
3287 }
3288 else {
3280af22 3289 if (PL_modcount < 10000 &&
c07a80fd 3290 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3291 {
3292 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3293 if (SvIVX(sv) == 0)
3280af22 3294 sv_setiv(sv, PL_modcount+1);
c07a80fd 3295 }
3296 }
3297 }
3298 }
11343788 3299 return o;
79072805
LW		 3300 }
3301 if (!right)
3302 right = newOP(OP_UNDEF, 0);
3303 if (right->op_type == OP_READLINE) {
3304 right->op_flags |= OPf_STACKED;
463ee0b2 3305 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3306 }
a0d0e21e 3307 else {
3280af22 3308 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3309 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3310 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3311 if (PL_eval_start)
3312 PL_eval_start = 0;
748a9306 3313 else {
11343788 3314 op_free(o);
a0d0e21e
LW		 3315 return Nullop;
3316 }
3317 }
11343788 3318 return o;
79072805
LW		 3319}
3320
3321OP *
864dbfa3 3322Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3323{
11343788 3324 dTHR;
bbce6d69 3325 U32 seq = intro_my();
79072805
LW		 3326 register COP *cop;
3327
b7dc083c 3328 NewOp(1101, cop, 1, COP);
57843af0 3329 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3330 cop->op_type = OP_DBSTATE;
22c35a8c 3331 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3332 }
3333 else {
3334 cop->op_type = OP_NEXTSTATE;
22c35a8c 3335 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3336 }
79072805 3337 cop->op_flags = flags;
a0ed51b3 3338 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3339#ifdef NATIVE_HINTS
3340 cop->op_private |= NATIVE_HINTS;
3341#endif
e24b16f9 3342 PL_compiling.op_private = cop->op_private;
79072805
LW		 3343 cop->op_next = (OP*)cop;
3344
463ee0b2
LW		 3345 if (label) {
3346 cop->cop_label = label;
3280af22 3347 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3348 }
bbce6d69 3349 cop->cop_seq = seq;
3280af22 3350 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3351 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3352 cop->cop_warnings = PL_curcop->cop_warnings ;
3353 else
3354 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3355
79072805 3356
3280af22 3357 if (PL_copline == NOLINE)
57843af0 3358 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3359 else {
57843af0 3360 CopLINE_set(cop, PL_copline);
3280af22 3361 PL_copline = NOLINE;
79072805 3362 }
57843af0
GS		 3363#ifdef USE_ITHREADS
3364 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3365#else
cc49e20b 3366 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3367#endif
11faa288 3368 CopSTASH_set(cop, PL_curstash);
79072805 3369
3280af22 3370 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3371 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3372 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3373 (void)SvIOK_on(*svp);
57b2e452 3374 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3375 }
3376 }
3377
11343788 3378 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3379}
3380
bbce6d69 3381/* "Introduce" my variables to visible status. */
3382U32
864dbfa3 3383Perl_intro_my(pTHX)
bbce6d69 3384{
3385 SV **svp;
3386 SV *sv;
3387 I32 i;
3388
3280af22
NIS		 3389 if (! PL_min_intro_pending)
3390 return PL_cop_seqmax;
bbce6d69 3391
3280af22
NIS		 3392 svp = AvARRAY(PL_comppad_name);
3393 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3394 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3395 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3396 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3397 }
3398 }
3280af22
NIS		 3399 PL_min_intro_pending = 0;
3400 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3401 return PL_cop_seqmax++;
bbce6d69 3402}
3403
79072805 3404OP *
864dbfa3 3405Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3406{
883ffac3
CS		 3407 return new_logop(type, flags, &first, &other);
3408}
3409
3bd495df 3410STATIC OP *
cea2e8a9 3411S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3412{
11343788 3413 dTHR;
79072805 3414 LOGOP *logop;
11343788 3415 OP *o;
883ffac3
CS		 3416 OP *first = *firstp;
3417 OP *other = *otherp;
79072805 3418
a0d0e21e
LW		 3419 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3420 return newBINOP(type, flags, scalar(first), scalar(other));
3421
8990e307 3422 scalarboolean(first);
79072805
LW		 3423 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3424 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3425 if (type == OP_AND || type == OP_OR) {
3426 if (type == OP_AND)
3427 type = OP_OR;
3428 else
3429 type = OP_AND;
11343788 3430 o = first;
883ffac3 3431 first = *firstp = cUNOPo->op_first;
11343788
MB		 3432 if (o->op_next)
3433 first->op_next = o->op_next;
3434 cUNOPo->op_first = Nullop;
3435 op_free(o);
79072805
LW		 3436 }
3437 }
3438 if (first->op_type == OP_CONST) {
599cee73 3439 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3440 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3441 PL_op_desc[type]);
79072805
LW		 3442 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3443 op_free(first);
883ffac3 3444 *firstp = Nullop;
79072805
LW		 3445 return other;
3446 }
3447 else {
3448 op_free(other);
883ffac3 3449 *otherp = Nullop;
79072805
LW		 3450 return first;
3451 }
3452 }
3453 else if (first->op_type == OP_WANTARRAY) {
3454 if (type == OP_AND)
3455 list(other);
3456 else
3457 scalar(other);
3458 }
599cee73 3459 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3460 OP *k1 = ((UNOP*)first)->op_first;
3461 OP *k2 = k1->op_sibling;
3462 OPCODE warnop = 0;
3463 switch (first->op_type)
3464 {
3465 case OP_NULL:
3466 if (k2 && k2->op_type == OP_READLINE
3467 && (k2->op_flags & OPf_STACKED)
55d729e4 3468 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3469 {
a6006777 3470 warnop = k2->op_type;
72b16652 3471 }
a6006777 3472 break;
3473
3474 case OP_SASSIGN:
68dc0745 3475 if (k1->op_type == OP_READDIR
3476 || k1->op_type == OP_GLOB
72b16652 3477 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3478 || k1->op_type == OP_EACH)
72b16652
GS		 3479 {
3480 warnop = ((k1->op_type == OP_NULL)
3481 ? k1->op_targ : k1->op_type);
3482 }
a6006777 3483 break;
3484 }
8ebc5c01 3485 if (warnop) {
57843af0
GS		 3486 line_t oldline = CopLINE(PL_curcop);
3487 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 3488 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3489 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3490 PL_op_desc[warnop],
68dc0745 3491 ((warnop == OP_READLINE || warnop == OP_GLOB)
3492 ? " construct" : "() operator"));
57843af0 3493 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3494 }
a6006777 3495 }
79072805
LW		 3496
3497 if (!other)
3498 return first;
3499
a0d0e21e
LW		 3500 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3501 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3502
b7dc083c 3503 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3504
3505 logop->op_type = type;
22c35a8c 3506 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3507 logop->op_first = first;
3508 logop->op_flags = flags | OPf_KIDS;
3509 logop->op_other = LINKLIST(other);
c07a80fd 3510 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3511
3512 /* establish postfix order */
3513 logop->op_next = LINKLIST(first);
3514 first->op_next = (OP*)logop;
3515 first->op_sibling = other;
3516
11343788
MB		 3517 o = newUNOP(OP_NULL, 0, (OP*)logop);
3518 other->op_next = o;
79072805 3519
11343788 3520 return o;
79072805
LW		 3521}
3522
3523OP *
864dbfa3 3524Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3525{
11343788 3526 dTHR;
1a67a97c
SM		 3527 LOGOP *logop;
3528 OP *start;
11343788 3529 OP *o;
79072805 3530
b1cb66bf 3531 if (!falseop)
3532 return newLOGOP(OP_AND, 0, first, trueop);
3533 if (!trueop)
3534 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3535
8990e307 3536 scalarboolean(first);
79072805
LW		 3537 if (first->op_type == OP_CONST) {
3538 if (SvTRUE(((SVOP*)first)->op_sv)) {
3539 op_free(first);
b1cb66bf 3540 op_free(falseop);
3541 return trueop;
79072805
LW		 3542 }
3543 else {
3544 op_free(first);
b1cb66bf 3545 op_free(trueop);
3546 return falseop;
79072805
LW		 3547 }
3548 }
3549 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3550 list(trueop);
3551 scalar(falseop);
79072805 3552 }
1a67a97c
SM		 3553 NewOp(1101, logop, 1, LOGOP);
3554 logop->op_type = OP_COND_EXPR;
3555 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3556 logop->op_first = first;
3557 logop->op_flags = flags | OPf_KIDS;
3558 logop->op_private = 1 | (flags >> 8);
3559 logop->op_other = LINKLIST(trueop);
3560 logop->op_next = LINKLIST(falseop);
79072805 3561
79072805
LW		 3562
3563 /* establish postfix order */
1a67a97c
SM		 3564 start = LINKLIST(first);
3565 first->op_next = (OP*)logop;
79072805 3566
b1cb66bf 3567 first->op_sibling = trueop;
3568 trueop->op_sibling = falseop;
1a67a97c 3569 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3570
1a67a97c 3571 trueop->op_next = falseop->op_next = o;
79072805 3572
1a67a97c 3573 o->op_next = start;
11343788 3574 return o;
79072805
LW		 3575}
3576
3577OP *
864dbfa3 3578Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3579{
b35b2403 3580 dTHR;
1a67a97c 3581 LOGOP *range;
79072805
LW		 3582 OP *flip;
3583 OP *flop;
1a67a97c 3584 OP *leftstart;
11343788 3585 OP *o;
79072805 3586
1a67a97c 3587 NewOp(1101, range, 1, LOGOP);
79072805 3588
1a67a97c
SM		 3589 range->op_type = OP_RANGE;
3590 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3591 range->op_first = left;
3592 range->op_flags = OPf_KIDS;
3593 leftstart = LINKLIST(left);
3594 range->op_other = LINKLIST(right);
3595 range->op_private = 1 | (flags >> 8);
79072805
LW		 3596
3597 left->op_sibling = right;
3598
1a67a97c
SM		 3599 range->op_next = (OP*)range;
3600 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3601 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3602 o = newUNOP(OP_NULL, 0, flop);
79072805 3603 linklist(flop);
1a67a97c 3604 range->op_next = leftstart;
79072805
LW		 3605
3606 left->op_next = flip;
3607 right->op_next = flop;
3608
1a67a97c
SM		 3609 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3610 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3611 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3612 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3613
3614 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3615 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3616
11343788 3617 flip->op_next = o;
79072805 3618 if (!flip->op_private || !flop->op_private)
11343788 3619 linklist(o); /* blow off optimizer unless constant */
79072805 3620
11343788 3621 return o;
79072805
LW		 3622}
3623
3624OP *
864dbfa3 3625Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3626{
11343788 3627 dTHR;
463ee0b2 3628 OP* listop;
11343788 3629 OP* o;
463ee0b2 3630 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3631 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3632
463ee0b2
LW		 3633 if (expr) {
3634 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3635 return block; /* do {} while 0 does once */
fb73857a 3636 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3637 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3638 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3639 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3640 } else if (expr->op_flags & OPf_KIDS) {
3641 OP *k1 = ((UNOP*)expr)->op_first;
3642 OP *k2 = (k1) ? k1->op_sibling : NULL;
3643 switch (expr->op_type) {
3644 case OP_NULL:
3645 if (k2 && k2->op_type == OP_READLINE
3646 && (k2->op_flags & OPf_STACKED)
3647 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3648 expr = newUNOP(OP_DEFINED, 0, expr);
3649 break;
3650
3651 case OP_SASSIGN:
3652 if (k1->op_type == OP_READDIR
3653 || k1->op_type == OP_GLOB
72b16652 3654 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3655 || k1->op_type == OP_EACH)
3656 expr = newUNOP(OP_DEFINED, 0, expr);
3657 break;
3658 }
774d564b 3659 }
463ee0b2 3660 }
93a17b20 3661
8990e307 3662 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3663 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3664
883ffac3
CS		 3665 if (listop)
3666 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3667
11343788
MB		 3668 if (once && o != listop)
3669 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3670
11343788
MB		 3671 if (o == listop)
3672 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3673
11343788
MB		 3674 o->op_flags |= flags;
3675 o = scope(o);
3676 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3677 return o;
79072805
LW		 3678}
3679
3680OP *
864dbfa3 3681Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3682{
11343788 3683 dTHR;
79072805
LW		 3684 OP *redo;
3685 OP *next = 0;
3686 OP *listop;
11343788 3687 OP *o;
79072805
LW		 3688 OP *condop;
3689
fb73857a 3690 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3691 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3692 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3693 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3694 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3695 OP *k1 = ((UNOP*)expr)->op_first;
3696 OP *k2 = (k1) ? k1->op_sibling : NULL;
3697 switch (expr->op_type) {
3698 case OP_NULL:
3699 if (k2 && k2->op_type == OP_READLINE
3700 && (k2->op_flags & OPf_STACKED)
3701 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3702 expr = newUNOP(OP_DEFINED, 0, expr);
3703 break;
3704
3705 case OP_SASSIGN:
3706 if (k1->op_type == OP_READDIR
3707 || k1->op_type == OP_GLOB
72b16652 3708 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3709 || k1->op_type == OP_EACH)
3710 expr = newUNOP(OP_DEFINED, 0, expr);
3711 break;
3712 }
748a9306 3713 }
79072805
LW		 3714
3715 if (!block)
3716 block = newOP(OP_NULL, 0);
3717
3718 if (cont)
3719 next = LINKLIST(cont);
fb73857a 3720 if (expr) {
79072805 3721 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3722 if ((line_t)whileline != NOLINE) {
3280af22 3723 PL_copline = whileline;
fb73857a 3724 cont = append_elem(OP_LINESEQ, cont,
3725 newSTATEOP(0, Nullch, Nullop));
3726 }
3727 }
79072805 3728
463ee0b2 3729 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3730 redo = LINKLIST(listop);
3731
3732 if (expr) {
3280af22 3733 PL_copline = whileline;
883ffac3
CS		 3734 scalar(listop);
3735 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3736 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3737 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3738 op_free((OP*)loop);
883ffac3 3739 return Nullop; /* listop already freed by new_logop */
463ee0b2 3740 }
883ffac3
CS		 3741 if (listop)
3742 ((LISTOP*)listop)->op_last->op_next = condop =
3743 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3744 if (!next)
3745 next = condop;
3746 }
3747 else
11343788 3748 o = listop;
79072805
LW		 3749
3750 if (!loop) {
b7dc083c 3751 NewOp(1101,loop,1,LOOP);
79072805 3752 loop->op_type = OP_ENTERLOOP;
22c35a8c 3753 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3754 loop->op_private = 0;
3755 loop->op_next = (OP*)loop;
3756 }
3757
11343788 3758 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3759
3760 loop->op_redoop = redo;
11343788 3761 loop->op_lastop = o;
79072805
LW		 3762
3763 if (next)
3764 loop->op_nextop = next;
3765 else
11343788 3766 loop->op_nextop = o;
79072805 3767
11343788
MB		 3768 o->op_flags |= flags;
3769 o->op_private |= (flags >> 8);
3770 return o;
79072805
LW		 3771}
3772
3773OP *
864dbfa3 3774Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3775{
3776 LOOP *loop;
b7dc083c 3777 LOOP *tmp;
fb73857a 3778 OP *wop;
85e6fe83 3779 int padoff = 0;
4633a7c4 3780 I32 iterflags = 0;
79072805 3781
79072805 3782 if (sv) {
85e6fe83 3783 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3784 sv->op_type = OP_RV2GV;
22c35a8c 3785 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3786 }
85e6fe83
LW		 3787 else if (sv->op_type == OP_PADSV) { /* private variable */
3788 padoff = sv->op_targ;
743e66e6 3789 sv->op_targ = 0;
85e6fe83
LW		 3790 op_free(sv);
3791 sv = Nullop;
3792 }
54b9620d
MB		 3793 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3794 padoff = sv->op_targ;
743e66e6 3795 sv->op_targ = 0;
54b9620d
MB		 3796 iterflags |= OPf_SPECIAL;
3797 op_free(sv);
3798 sv = Nullop;
3799 }
79072805 3800 else
cea2e8a9 3801 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3802 }
3803 else {
54b9620d
MB		 3804#ifdef USE_THREADS
3805 padoff = find_threadsv("_");
3806 iterflags |= OPf_SPECIAL;
3807#else
3280af22 3808 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3809#endif
79072805 3810 }
5f05dabc 3811 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3812 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3813 iterflags |= OPf_STACKED;
3814 }
89ea2908
GA		 3815 else if (expr->op_type == OP_NULL &&
3816 (expr->op_flags & OPf_KIDS) &&
3817 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3818 {
3819 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3820 * set the STACKED flag to indicate that these values are to be
3821 * treated as min/max values by 'pp_iterinit'.
3822 */
3823 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3824 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3825 OP* left = range->op_first;
3826 OP* right = left->op_sibling;
5152d7c7 3827 LISTOP* listop;
89ea2908
GA		 3828
3829 range->op_flags &= ~OPf_KIDS;
3830 range->op_first = Nullop;
3831
5152d7c7 3832 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3833 listop->op_first->op_next = range->op_next;
3834 left->op_next = range->op_other;
5152d7c7
GS		 3835 right->op_next = (OP*)listop;
3836 listop->op_next = listop->op_first;
89ea2908
GA		 3837
3838 op_free(expr);
5152d7c7 3839 expr = (OP*)(listop);
89ea2908
GA		 3840 null(expr);
3841 iterflags |= OPf_STACKED;
3842 }
3843 else {
3844 expr = mod(force_list(expr), OP_GREPSTART);
3845 }
3846
3847
4633a7c4 3848 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3849 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3850 assert(!loop->op_next);
b7dc083c
NIS		 3851#ifdef PL_OP_SLAB_ALLOC
3852 NewOp(1234,tmp,1,LOOP);
3853 Copy(loop,tmp,1,LOOP);
3854 loop = tmp;
3855#else
85e6fe83 3856 Renew(loop, 1, LOOP);
b7dc083c 3857#endif
85e6fe83 3858 loop->op_targ = padoff;
fb73857a 3859 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3860 PL_copline = forline;
fb73857a 3861 return newSTATEOP(0, label, wop);
79072805
LW		 3862}
3863
8990e307 3864OP*
864dbfa3 3865Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3866{
11343788
MB		 3867 dTHR;
3868 OP *o;
2d8e6c8d
GS		 3869 STRLEN n_a;
3870
8990e307 3871 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3872 /* "last()" means "last" */
3873 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3874 o = newOP(type, OPf_SPECIAL);
3875 else {
3876 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3877 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3878 : ""));
3879 }
8990e307
LW		 3880 op_free(label);
3881 }
3882 else {
a0d0e21e
LW		 3883 if (label->op_type == OP_ENTERSUB)
3884 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3885 o = newUNOP(type, OPf_STACKED, label);
8990e307 3886 }
3280af22 3887 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3888 return o;
8990e307
LW		 3889}
3890
79072805 3891void
864dbfa3 3892Perl_cv_undef(pTHX_ CV *cv)
79072805 3893{
11343788
MB		 3894 dTHR;
3895#ifdef USE_THREADS
e858de61
MB		 3896 if (CvMUTEXP(cv)) {
3897 MUTEX_DESTROY(CvMUTEXP(cv));
3898 Safefree(CvMUTEXP(cv));
3899 CvMUTEXP(cv) = 0;
3900 }
11343788
MB		 3901#endif /* USE_THREADS */
3902
a0d0e21e 3903 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3904#ifdef USE_THREADS
3905 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3906 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3907#else
a0d0e21e 3908 if (CvDEPTH(cv))
cea2e8a9 3909 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3910#endif /* USE_THREADS */
8990e307 3911 ENTER;
a0d0e21e 3912
7766f137 3913 SAVEVPTR(PL_curpad);
3280af22 3914 PL_curpad = 0;
a0d0e21e 3915
a5f75d66 3916 if (!CvCLONED(cv))
748a9306 3917 op_free(CvROOT(cv));
79072805 3918 CvROOT(cv) = Nullop;
8990e307 3919 LEAVE;
79072805 3920 }
1d5db326 3921 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3922 CvFLAGS(cv) = 0;
8e07c86e
AD		 3923 SvREFCNT_dec(CvGV(cv));
3924 CvGV(cv) = Nullgv;
3925 SvREFCNT_dec(CvOUTSIDE(cv));
3926 CvOUTSIDE(cv) = Nullcv;
3927 if (CvPADLIST(cv)) {
8ebc5c01 3928 /* may be during global destruction */
3929 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3930 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3931 while (i >= 0) {
3932 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3933 SV* sv = svp ? *svp : Nullsv;
3934 if (!sv)
3935 continue;
3280af22
NIS		 3936 if (sv == (SV*)PL_comppad_name)
3937 PL_comppad_name = Nullav;
3938 else if (sv == (SV*)PL_comppad) {
3939 PL_comppad = Nullav;
3940 PL_curpad = Null(SV**);
46fc3d4c 3941 }
3942 SvREFCNT_dec(sv);
8ebc5c01 3943 }
3944 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3945 }
8e07c86e
AD		 3946 CvPADLIST(cv) = Nullav;
3947 }
79072805
LW		 3948}
3949
76e3520e 3950STATIC void
743e66e6 3951S_cv_dump(pTHX_ CV *cv)
5f05dabc 3952{
62fde642 3953#ifdef DEBUGGING
5f05dabc 3954 CV *outside = CvOUTSIDE(cv);
3955 AV* padlist = CvPADLIST(cv);
4fdae800 3956 AV* pad_name;
3957 AV* pad;
3958 SV** pname;
3959 SV** ppad;
5f05dabc 3960 I32 ix;
3961
b900a521
JH		 3962 PerlIO_printf(Perl_debug_log,
3963 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
3964 PTR2UV(cv),
ab50184a 3965 (CvANON(cv) ? "ANON"
6b88bc9c 3966 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3967 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3968 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 3969 PTR2UV(outside),
ab50184a
CS		 3970 (!outside ? "null"
3971 : CvANON(outside) ? "ANON"
6b88bc9c 3972 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3973 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3974 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3975
4fdae800 3976 if (!padlist)
3977 return;
3978
3979 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3980 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3981 pname = AvARRAY(pad_name);
3982 ppad = AvARRAY(pad);
3983
93965878 3984 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3985 if (SvPOK(pname[ix]))
b900a521
JH		 3986 PerlIO_printf(Perl_debug_log,
3987 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
3988 ix, PTR2UV(ppad[ix]),
4fdae800 3989 SvFAKE(pname[ix]) ? "FAKE " : "",
3990 SvPVX(pname[ix]),
b900a521
JH		 3991 (IV)I_32(SvNVX(pname[ix])),
3992 SvIVX(pname[ix]));
5f05dabc 3993 }
743e66e6 3994#endif /* DEBUGGING */
62fde642 3995}
5f05dabc 3996
76e3520e 3997STATIC CV *
cea2e8a9 3998S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 3999{
11343788 4000 dTHR;
748a9306
LW		 4001 AV* av;
4002 I32 ix;
4003 AV* protopadlist = CvPADLIST(proto);
4004 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4005 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4006 SV** pname = AvARRAY(protopad_name);
4007 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4008 I32 fname = AvFILLp(protopad_name);
4009 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4010 AV* comppadlist;
4011 CV* cv;
4012
07055b4c
CS		 4013 assert(!CvUNIQUE(proto));
4014
748a9306 4015 ENTER;
7766f137 4016 SAVEVPTR(PL_curpad);
3280af22
NIS		 4017 SAVESPTR(PL_comppad);
4018 SAVESPTR(PL_comppad_name);
4019 SAVESPTR(PL_compcv);
748a9306 4020
3280af22 4021 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4022 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 4023 CvCLONED_on(cv);
5f05dabc 4024 if (CvANON(proto))
4025 CvANON_on(cv);
748a9306 4026
11343788 4027#ifdef USE_THREADS
12ca11f6 4028 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4029 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4030 CvOWNER(cv) = 0;
4031#endif /* USE_THREADS */
57843af0 4032 CvFILE(cv) = CvFILE(proto);
44a8e56a 4033 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4034 CvSTASH(cv) = CvSTASH(proto);
4035 CvROOT(cv) = CvROOT(proto);
4036 CvSTART(cv) = CvSTART(proto);
5f05dabc 4037 if (outside)
4038 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4039
68dc0745 4040 if (SvPOK(proto))
4041 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4042
3280af22 4043 PL_comppad_name = newAV();
46fc3d4c 4044 for (ix = fname; ix >= 0; ix--)
3280af22 4045 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4046
3280af22 4047 PL_comppad = newAV();
748a9306
LW		 4048
4049 comppadlist = newAV();
4050 AvREAL_off(comppadlist);
3280af22
NIS		 4051 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4052 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4053 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4054 av_fill(PL_comppad, AvFILLp(protopad));
4055 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4056
4057 av = newAV(); /* will be @_ */
4058 av_extend(av, 0);
3280af22 4059 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4060 AvFLAGS(av) = AVf_REIFY;
4061
9607fc9c 4062 for (ix = fpad; ix > 0; ix--) {
4063 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4064 if (namesv && namesv != &PL_sv_undef) {
aa689395 4065 char *name = SvPVX(namesv); /* XXX */
4066 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4067 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4068 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4069 if (!off)
3280af22 4070 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4071 else if (off != ix)
cea2e8a9 4072 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4073 }
4074 else { /* our own lexical */
aa689395 4075 SV* sv;
5f05dabc 4076 if (*name == '&') {
4077 /* anon code -- we'll come back for it */
4078 sv = SvREFCNT_inc(ppad[ix]);
4079 }
4080 else if (*name == '@')
4081 sv = (SV*)newAV();
748a9306 4082 else if (*name == '%')
5f05dabc 4083 sv = (SV*)newHV();
748a9306 4084 else
5f05dabc 4085 sv = NEWSV(0,0);
4086 if (!SvPADBUSY(sv))
4087 SvPADMY_on(sv);
3280af22 4088 PL_curpad[ix] = sv;
748a9306
LW		 4089 }
4090 }
7766f137 4091 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4092 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4093 }
748a9306 4094 else {
aa689395 4095 SV* sv = NEWSV(0,0);
748a9306 4096 SvPADTMP_on(sv);
3280af22 4097 PL_curpad[ix] = sv;
748a9306
LW		 4098 }
4099 }
4100
5f05dabc 4101 /* Now that vars are all in place, clone nested closures. */
4102
9607fc9c 4103 for (ix = fpad; ix > 0; ix--) {
4104 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4105 if (namesv
3280af22 4106 && namesv != &PL_sv_undef
aa689395 4107 && !(SvFLAGS(namesv) & SVf_FAKE)
4108 && *SvPVX(namesv) == '&'
5f05dabc 4109 && CvCLONE(ppad[ix]))
4110 {
4111 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4112 SvREFCNT_dec(ppad[ix]);
4113 CvCLONE_on(kid);
4114 SvPADMY_on(kid);
3280af22 4115 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4116 }
4117 }
4118
5f05dabc 4119#ifdef DEBUG_CLOSURES
ab50184a
CS		 4120 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4121 cv_dump(outside);
4122 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4123 cv_dump(proto);
ab50184a 4124 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4125 cv_dump(cv);
4126#endif
4127
748a9306
LW		 4128 LEAVE;
4129 return cv;
4130}
4131
4132CV *
864dbfa3 4133Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4134{
b099ddc0
GS		 4135 CV *cv;
4136 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
4137 cv = cv_clone2(proto, CvOUTSIDE(proto));
4138 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
4139 return cv;
5f05dabc 4140}
4141
3fe9a6f1 4142void
864dbfa3 4143Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4144{
0453d815
PM		 4145 dTHR;
4146
f248d071 4147 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 4148 SV* msg = sv_newmortal();
3fe9a6f1 4149 SV* name = Nullsv;
4150
4151 if (gv)
46fc3d4c 4152 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4153 sv_setpv(msg, "Prototype mismatch:");
4154 if (name)
cea2e8a9 4155 Perl_sv_catpvf(aTHX_ msg, " sub %_", name);
3fe9a6f1 4156 if (SvPOK(cv))
cea2e8a9 4157 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4158 sv_catpv(msg, " vs ");
4159 if (p)
cea2e8a9 4160 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4161 else
4162 sv_catpv(msg, "none");
0453d815 4163 Perl_warner(aTHX_ WARN_UNSAFE, "%_", msg);
3fe9a6f1 4164 }
4165}
4166
760ac839 4167SV *
864dbfa3 4168Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4169{
54310121 4170 if (!cv || !SvPOK(cv) || SvCUR(cv))
4171 return Nullsv;
fe5e78ed
GS		 4172 return op_const_sv(CvSTART(cv), cv);
4173}
760ac839 4174
fe5e78ed 4175SV *
864dbfa3 4176Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4177{
4178 SV *sv = Nullsv;
4179
4180 if(!o)
4181 return Nullsv;
4182
4183 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
4184 o = cLISTOPo->op_first->op_sibling;
4185
4186 for (; o; o = o->op_next) {
54310121 4187 OPCODE type = o->op_type;
fe5e78ed 4188
acb36ea4 4189 if (sv && o->op_next == o)
fe5e78ed 4190 return sv;
54310121 4191 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4192 continue;
4193 if (type == OP_LEAVESUB || type == OP_RETURN)
4194 break;
4195 if (sv)
4196 return Nullsv;
7766f137 4197 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4198 sv = cSVOPo->op_sv;
7766f137 4199 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4200 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4201 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4202 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4203 return Nullsv;
760ac839 4204 }
54310121 4205 else
4206 return Nullsv;
760ac839 4207 }
5aabfad6 4208 if (sv)
4209 SvREADONLY_on(sv);
760ac839
LW		 4210 return sv;
4211}
4212
09bef843
SB		 4213void
4214Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4215{
4216 if (o)
4217 SAVEFREEOP(o);
4218 if (proto)
4219 SAVEFREEOP(proto);
4220 if (attrs)
4221 SAVEFREEOP(attrs);
4222 if (block)
4223 SAVEFREEOP(block);
4224 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4225}
4226
748a9306 4227CV *
864dbfa3 4228Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4229{
09bef843
SB		 4230 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4231}
4232
4233CV *
4234Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4235{
11343788 4236 dTHR;
2d8e6c8d
GS		 4237 STRLEN n_a;
4238 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4 4239 GV *gv = gv_fetchpv(name ? name : "__ANON__",
09bef843
SB		 4240 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4241 SVt_PVCV);
2d8e6c8d 4242 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4243 register CV *cv=0;
a0d0e21e 4244 I32 ix;
79072805 4245
11343788 4246 if (o)
5dc0d613 4247 SAVEFREEOP(o);
3fe9a6f1 4248 if (proto)
4249 SAVEFREEOP(proto);
09bef843
SB		 4250 if (attrs)
4251 SAVEFREEOP(attrs);
3fe9a6f1 4252
09bef843 4253 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4254 maximum a prototype before. */
4255 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4256 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4257 && ckWARN_d(WARN_UNSAFE))
4258 {
0453d815 4259 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4260 }
55d729e4
GS		 4261 cv_ckproto((CV*)gv, NULL, ps);
4262 }
4263 if (ps)
4264 sv_setpv((SV*)gv, ps);
4265 else
4266 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4267 SvREFCNT_dec(PL_compcv);
4268 cv = PL_compcv = NULL;
4269 PL_sub_generation++;
55d729e4
GS		 4270 goto noblock;
4271 }
4272
68dc0745 4273 if (!name || GvCVGEN(gv))
4274 cv = Nullcv;
4275 else if (cv = GvCV(gv)) {
3fe9a6f1 4276 cv_ckproto(cv, gv, ps);
68dc0745 4277 /* already defined (or promised)? */
4278 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4279 SV* const_sv;
fe5e78ed 4280 bool const_changed = TRUE;
09bef843 4281 if (!block && !attrs) {
aa689395 4282 /* just a "sub foo;" when &foo is already defined */
3280af22 4283 SAVEFREESV(PL_compcv);
aa689395 4284 goto done;
4285 }
7bac28a0 4286 /* ahem, death to those who redefine active sort subs */
3280af22 4287 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4288 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4289 if (!block)
4290 goto withattrs;
fe5e78ed
GS		 4291 if(const_sv = cv_const_sv(cv))
4292 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4293 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4294 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4295 && HvNAME(GvSTASH(CvGV(cv)))
4296 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
4297 "autouse"))) {
57843af0
GS		 4298 line_t oldline = CopLINE(PL_curcop);
4299 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4300 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4301 const_sv ? "Constant subroutine %s redefined"
09bef843 4302 : "Subroutine %s redefined", name);
57843af0 4303 CopLINE_set(PL_curcop, oldline);
79072805 4304 }
8990e307 4305 SvREFCNT_dec(cv);
68dc0745 4306 cv = Nullcv;
79072805
LW		 4307 }
4308 }
09bef843
SB		 4309 withattrs:
4310 if (attrs) {
4311 HV *stash;
4312 SV *rcv;
4313
4314 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4315 * before we clobber PL_compcv.
4316 */
4317 if (cv && !block) {
4318 rcv = (SV*)cv;
4319 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4320 stash = GvSTASH(CvGV(cv));
4321 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4322 stash = CvSTASH(cv);
4323 else
4324 stash = PL_curstash;
4325 }
4326 else {
4327 /* possibly about to re-define existing subr -- ignore old cv */
4328 rcv = (SV*)PL_compcv;
4329 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4330 stash = GvSTASH(gv);
4331 else
4332 stash = PL_curstash;
4333 }
4334 apply_attrs(stash, rcv, attrs);
4335 }
a0d0e21e 4336 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4337 if (!block) {
4338 /* got here with just attrs -- work done, so bug out */
4339 SAVEFREESV(PL_compcv);
4340 goto done;
4341 }
4633a7c4 4342 cv_undef(cv);
3280af22
NIS		 4343 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4344 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4345 CvOUTSIDE(PL_compcv) = 0;
4346 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4347 CvPADLIST(PL_compcv) = 0;
4348 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4349 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4350 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4351 }
4352 else {
3280af22 4353 cv = PL_compcv;
44a8e56a 4354 if (name) {
4355 GvCV(gv) = cv;
4356 GvCVGEN(gv) = 0;
3280af22 4357 PL_sub_generation++;
44a8e56a 4358 }
a0d0e21e 4359 }
44a8e56a 4360 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4361 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4362 CvSTASH(cv) = PL_curstash;
11343788
MB		 4363#ifdef USE_THREADS
4364 CvOWNER(cv) = 0;
1cfa4ec7 4365 if (!CvMUTEXP(cv)) {
f6aaf501 4366 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4367 MUTEX_INIT(CvMUTEXP(cv));
4368 }
11343788 4369#endif /* USE_THREADS */
8990e307 4370
3fe9a6f1 4371 if (ps)
4372 sv_setpv((SV*)cv, ps);
4633a7c4 4373
3280af22 4374 if (PL_error_count) {
c07a80fd 4375 op_free(block);
4376 block = Nullop;
68dc0745 4377 if (name) {
4378 char *s = strrchr(name, ':');
4379 s = s ? s+1 : name;
6d4c2119
CS		 4380 if (strEQ(s, "BEGIN")) {
4381 char *not_safe =
4382 "BEGIN not safe after errors--compilation aborted";
faef0170 4383 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4384 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4385 else {
4386 /* force display of errors found but not reported */
38a03e6e 4387 sv_catpv(ERRSV, not_safe);
cea2e8a9 4388 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4389 }
4390 }
68dc0745 4391 }
c07a80fd 4392 }
a0d0e21e 4393 if (!block) {
55d729e4 4394 noblock:
3280af22 4395 PL_copline = NOLINE;
a0d0e21e
LW		 4396 LEAVE_SCOPE(floor);
4397 return cv;
4398 }
4399
3280af22
NIS		 4400 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4401 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4402
7766f137
GS		 4403 if (CvLVALUE(cv)) {
4404 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4405 }
4406 else {
4407 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4408 }
4409 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4410 OpREFCNT_set(CvROOT(cv), 1);
4411 CvSTART(cv) = LINKLIST(CvROOT(cv));
4412 CvROOT(cv)->op_next = 0;
4413 peep(CvSTART(cv));
4414
4415 /* now that optimizer has done its work, adjust pad values */
54310121 4416 if (CvCLONE(cv)) {
3280af22
NIS		 4417 SV **namep = AvARRAY(PL_comppad_name);
4418 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4419 SV *namesv;
4420
7766f137 4421 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4422 continue;
4423 /*
4424 * The only things that a clonable function needs in its
4425 * pad are references to outer lexicals and anonymous subs.
4426 * The rest are created anew during cloning.
4427 */
4428 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4429 namesv != &PL_sv_undef &&
54310121 4430 (SvFAKE(namesv) ||
4431 *SvPVX(namesv) == '&')))
4432 {
3280af22
NIS		 4433 SvREFCNT_dec(PL_curpad[ix]);
4434 PL_curpad[ix] = Nullsv;
54310121 4435 }
4436 }
a0d0e21e 4437 }
54310121 4438 else {
4439 AV *av = newAV(); /* Will be @_ */
4440 av_extend(av, 0);
3280af22 4441 av_store(PL_comppad, 0, (SV*)av);
54310121 4442 AvFLAGS(av) = AVf_REIFY;
79072805 4443
3280af22 4444 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4445 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4446 continue;
3280af22
NIS		 4447 if (!SvPADMY(PL_curpad[ix]))
4448 SvPADTMP_on(PL_curpad[ix]);
54310121 4449 }
4450 }
79072805 4451
44a8e56a 4452 if (name) {
4453 char *s;
4454
3280af22 4455 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4456 SV *sv = NEWSV(0,0);
44a8e56a 4457 SV *tmpstr = sv_newmortal();
549bb64a 4458 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4459 CV *cv;
4460 HV *hv;
4461
ed094faf
GS		 4462 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4463 CopFILE(PL_curcop),
cc49e20b 4464 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4465 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4466 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4467 hv = GvHVn(db_postponed);
9607fc9c 4468 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4469 && (cv = GvCV(db_postponed))) {
44a8e56a 4470 dSP;
924508f0 4471 PUSHMARK(SP);
44a8e56a 4472 XPUSHs(tmpstr);
4473 PUTBACK;
864dbfa3 4474 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4475 }
4476 }
79072805 4477
44a8e56a 4478 if ((s = strrchr(name,':')))
28757baa 4479 s++;
4480 else
4481 s = name;
ed094faf
GS		 4482
4483 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4484 goto done;
4485
68dc0745 4486 if (strEQ(s, "BEGIN")) {
3280af22 4487 I32 oldscope = PL_scopestack_ix;
28757baa 4488 ENTER;
57843af0
GS		 4489 SAVECOPFILE(&PL_compiling);
4490 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4491 save_svref(&PL_rs);
4492 sv_setsv(PL_rs, PL_nrs);
28757baa 4493
3280af22
NIS		 4494 if (!PL_beginav)
4495 PL_beginav = newAV();
28757baa 4496 DEBUG_x( dump_sub(gv) );
ed094faf 4497 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4498 GvCV(gv) = 0;
3280af22 4499 call_list(oldscope, PL_beginav);
a6006777 4500
3280af22 4501 PL_curcop = &PL_compiling;
a0ed51b3 4502 PL_compiling.op_private = PL_hints;
28757baa 4503 LEAVE;
4504 }
3280af22
NIS		 4505 else if (strEQ(s, "END") && !PL_error_count) {
4506 if (!PL_endav)
4507 PL_endav = newAV();
ed094faf 4508 DEBUG_x( dump_sub(gv) );
3280af22 4509 av_unshift(PL_endav, 1);
ed094faf 4510 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4511 GvCV(gv) = 0;
4512 }
4f25aa18
GS		 4513 else if (strEQ(s, "STOP") && !PL_error_count) {
4514 if (!PL_stopav)
4515 PL_stopav = newAV();
ed094faf 4516 DEBUG_x( dump_sub(gv) );
4f25aa18 4517 av_unshift(PL_stopav, 1);
ed094faf 4518 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4519 GvCV(gv) = 0;
4520 }
3280af22
NIS		 4521 else if (strEQ(s, "INIT") && !PL_error_count) {
4522 if (!PL_initav)
4523 PL_initav = newAV();
ed094faf 4524 DEBUG_x( dump_sub(gv) );
3280af22 4525 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4526 GvCV(gv) = 0;
ae77835f 4527 }
79072805 4528 }
a6006777 4529
aa689395 4530 done:
3280af22 4531 PL_copline = NOLINE;
8990e307 4532 LEAVE_SCOPE(floor);
a0d0e21e 4533 return cv;
79072805
LW		 4534}
4535
b099ddc0 4536/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4537void
864dbfa3 4538Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4539{
4540 dTHR;
5476c433 4541
11faa288
GS		 4542 ENTER;
4543 SAVECOPLINE(PL_curcop);
4544 SAVEHINTS();
4545
4546 CopLINE_set(PL_curcop, PL_copline);
3280af22 4547 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4548
4549 if (stash) {
4550 SAVESPTR(PL_curstash);
4551 SAVECOPSTASH(PL_curcop);
4552 PL_curstash = stash;
4553#ifdef USE_ITHREADS
4554 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4555#else
4556 CopSTASH(PL_curcop) = stash;
4557#endif
4558 }
5476c433 4559
09bef843 4560 newATTRSUB(
be24f278 4561 start_subparse(FALSE, 0),
5476c433 4562 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4563 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4564 Nullop,
5476c433
JD		 4565 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4566 );
4567
11faa288 4568 LEAVE;
5476c433
JD		 4569}
4570
57d3b86d 4571CV *
864dbfa3 4572Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4573{
11343788 4574 dTHR;
44a8e56a 4575 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4576 register CV *cv;
44a8e56a 4577
4578 if (cv = (name ? GvCV(gv) : Nullcv)) {
4579 if (GvCVGEN(gv)) {
4580 /* just a cached method */
4581 SvREFCNT_dec(cv);
4582 cv = 0;
4583 }
4584 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4585 /* already defined (or promised) */
599cee73 4586 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4587 && HvNAME(GvSTASH(CvGV(cv)))
4588 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4589 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4590 if (PL_copline != NOLINE)
57843af0 4591 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4592 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4593 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4594 }
4595 SvREFCNT_dec(cv);
4596 cv = 0;
79072805 4597 }
79072805 4598 }
44a8e56a 4599
4600 if (cv) /* must reuse cv if autoloaded */
4601 cv_undef(cv);
a0d0e21e
LW		 4602 else {
4603 cv = (CV*)NEWSV(1105,0);
4604 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4605 if (name) {
4606 GvCV(gv) = cv;
4607 GvCVGEN(gv) = 0;
3280af22 4608 PL_sub_generation++;
44a8e56a 4609 }
a0d0e21e 4610 }
5196be3e 4611 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4612#ifdef USE_THREADS
12ca11f6 4613 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4614 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4615 CvOWNER(cv) = 0;
4616#endif /* USE_THREADS */
b195d487 4617 (void)gv_fetchfile(filename);
57843af0
GS		 4618 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4619 an external constant string */
a0d0e21e 4620 CvXSUB(cv) = subaddr;
44a8e56a 4621
28757baa 4622 if (name) {
4623 char *s = strrchr(name,':');
4624 if (s)
4625 s++;
4626 else
4627 s = name;
ed094faf
GS		 4628
4629 if (*s != 'B' && *s != 'E' && *s != 'S' && *s != 'I')
4630 goto done;
4631
28757baa 4632 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4633 if (!PL_beginav)
4634 PL_beginav = newAV();
ed094faf 4635 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4636 GvCV(gv) = 0;
28757baa 4637 }
4638 else if (strEQ(s, "END")) {
3280af22
NIS		 4639 if (!PL_endav)
4640 PL_endav = newAV();
4641 av_unshift(PL_endav, 1);
ed094faf 4642 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4643 GvCV(gv) = 0;
28757baa 4644 }
4f25aa18
GS		 4645 else if (strEQ(s, "STOP")) {
4646 if (!PL_stopav)
4647 PL_stopav = newAV();
4648 av_unshift(PL_stopav, 1);
ed094faf 4649 av_store(PL_stopav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4650 GvCV(gv) = 0;
4651 }
7d07dbc2 4652 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4653 if (!PL_initav)
4654 PL_initav = newAV();
ed094faf 4655 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4656 GvCV(gv) = 0;
ae77835f 4657 }
28757baa 4658 }
8990e307 4659 else
a5f75d66 4660 CvANON_on(cv);
44a8e56a 4661
ed094faf 4662done:
a0d0e21e 4663 return cv;
79072805
LW		 4664}
4665
4666void
864dbfa3 4667Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4668{
11343788 4669 dTHR;
79072805
LW		 4670 register CV *cv;
4671 char *name;
4672 GV *gv;
a0d0e21e 4673 I32 ix;
2d8e6c8d 4674 STRLEN n_a;
79072805 4675
11343788 4676 if (o)
2d8e6c8d 4677 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4678 else
4679 name = "STDOUT";
85e6fe83 4680 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4681 GvMULTI_on(gv);
79072805 4682 if (cv = GvFORM(gv)) {
599cee73 4683 if (ckWARN(WARN_REDEFINE)) {
57843af0 4684 line_t oldline = CopLINE(PL_curcop);
79072805 4685
57843af0 4686 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4687 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4688 CopLINE_set(PL_curcop, oldline);
79072805 4689 }
8990e307 4690 SvREFCNT_dec(cv);
79072805 4691 }
3280af22 4692 cv = PL_compcv;
79072805 4693 GvFORM(gv) = cv;
44a8e56a 4694 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4695 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4696
3280af22
NIS		 4697 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4698 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4699 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4700 }
4701
79072805 4702 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4703 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4704 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4705 CvSTART(cv) = LINKLIST(CvROOT(cv));
4706 CvROOT(cv)->op_next = 0;
4707 peep(CvSTART(cv));
11343788 4708 op_free(o);
3280af22 4709 PL_copline = NOLINE;
8990e307 4710 LEAVE_SCOPE(floor);
79072805
LW		 4711}
4712
4713OP *
864dbfa3 4714Perl_newANONLIST(pTHX_ OP *o)
79072805 4715{
93a17b20 4716 return newUNOP(OP_REFGEN, 0,
11343788 4717 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4718}
4719
4720OP *
864dbfa3 4721Perl_newANONHASH(pTHX_ OP *o)
79072805 4722{
93a17b20 4723 return newUNOP(OP_REFGEN, 0,
11343788 4724 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4725}
4726
4727OP *
864dbfa3 4728Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4729{
09bef843
SB		 4730 return newANONATTRSUB(floor, proto, Nullop, block);
4731}
4732
4733OP *
4734Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4735{
a0d0e21e 4736 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4737 newSVOP(OP_ANONCODE, 0,
4738 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4739}
4740
4741OP *
864dbfa3 4742Perl_oopsAV(pTHX_ OP *o)
79072805 4743{
ed6116ce
LW		 4744 switch (o->op_type) {
4745 case OP_PADSV:
4746 o->op_type = OP_PADAV;
22c35a8c 4747 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4748 return ref(o, OP_RV2AV);
ed6116ce
LW		 4749
4750 case OP_RV2SV:
79072805 4751 o->op_type = OP_RV2AV;
22c35a8c 4752 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4753 ref(o, OP_RV2AV);
ed6116ce
LW		 4754 break;
4755
4756 default:
0453d815
PM		 4757 if (ckWARN_d(WARN_INTERNAL))
4758 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4759 break;
4760 }
79072805
LW		 4761 return o;
4762}
4763
4764OP *
864dbfa3 4765Perl_oopsHV(pTHX_ OP *o)
79072805 4766{
0453d815 4767 dTHR;
0453d815 4768
ed6116ce
LW		 4769 switch (o->op_type) {
4770 case OP_PADSV:
4771 case OP_PADAV:
4772 o->op_type = OP_PADHV;
22c35a8c 4773 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4774 return ref(o, OP_RV2HV);
ed6116ce
LW		 4775
4776 case OP_RV2SV:
4777 case OP_RV2AV:
79072805 4778 o->op_type = OP_RV2HV;
22c35a8c 4779 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4780 ref(o, OP_RV2HV);
ed6116ce
LW		 4781 break;
4782
4783 default:
0453d815
PM		 4784 if (ckWARN_d(WARN_INTERNAL))
4785 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4786 break;
4787 }
79072805
LW		 4788 return o;
4789}
4790
4791OP *
864dbfa3 4792Perl_newAVREF(pTHX_ OP *o)
79072805 4793{
ed6116ce
LW		 4794 if (o->op_type == OP_PADANY) {
4795 o->op_type = OP_PADAV;
22c35a8c 4796 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4797 return o;
ed6116ce 4798 }
79072805
LW		 4799 return newUNOP(OP_RV2AV, 0, scalar(o));
4800}
4801
4802OP *
864dbfa3 4803Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4804{
82092f1d 4805 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4806 return newUNOP(OP_NULL, 0, o);
748a9306 4807 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4808}
4809
4810OP *
864dbfa3 4811Perl_newHVREF(pTHX_ OP *o)
79072805 4812{
ed6116ce
LW		 4813 if (o->op_type == OP_PADANY) {
4814 o->op_type = OP_PADHV;
22c35a8c 4815 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4816 return o;
ed6116ce 4817 }
79072805
LW		 4818 return newUNOP(OP_RV2HV, 0, scalar(o));
4819}
4820
4821OP *
864dbfa3 4822Perl_oopsCV(pTHX_ OP *o)
79072805 4823{
cea2e8a9 4824 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4825 /* STUB */
4826 return o;
4827}
4828
4829OP *
864dbfa3 4830Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4831{
c07a80fd 4832 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4833}
4834
4835OP *
864dbfa3 4836Perl_newSVREF(pTHX_ OP *o)
79072805 4837{
ed6116ce
LW		 4838 if (o->op_type == OP_PADANY) {
4839 o->op_type = OP_PADSV;
22c35a8c 4840 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4841 return o;
ed6116ce 4842 }
224a4551
MB		 4843 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4844 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4845 return o;
224a4551 4846 }
79072805
LW		 4847 return newUNOP(OP_RV2SV, 0, scalar(o));
4848}
4849
4850/* Check routines. */
4851
4852OP *
cea2e8a9 4853Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4854{
178c6305
CS		 4855 PADOFFSET ix;
4856 SV* name;
4857
4858 name = NEWSV(1106,0);
4859 sv_upgrade(name, SVt_PVNV);
4860 sv_setpvn(name, "&", 1);
4861 SvIVX(name) = -1;
4862 SvNVX(name) = 1;
5dc0d613 4863 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4864 av_store(PL_comppad_name, ix, name);
4865 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4866 SvPADMY_on(cSVOPo->op_sv);
4867 cSVOPo->op_sv = Nullsv;
4868 cSVOPo->op_targ = ix;
4869 return o;
5f05dabc 4870}
4871
4872OP *
cea2e8a9 4873Perl_ck_bitop(pTHX_ OP *o)
55497cff 4874{
3280af22 4875 o->op_private = PL_hints;
5dc0d613 4876 return o;
55497cff 4877}
4878
4879OP *
cea2e8a9 4880Perl_ck_concat(pTHX_ OP *o)
79072805 4881{
11343788
MB		 4882 if (cUNOPo->op_first->op_type == OP_CONCAT)
4883 o->op_flags |= OPf_STACKED;
4884 return o;
79072805
LW		 4885}
4886
4887OP *
cea2e8a9 4888Perl_ck_spair(pTHX_ OP *o)
79072805 4889{
11343788 4890 if (o->op_flags & OPf_KIDS) {
79072805 4891 OP* newop;
a0d0e21e 4892 OP* kid;
5dc0d613
MB		 4893 OPCODE type = o->op_type;
4894 o = modkids(ck_fun(o), type);
11343788 4895 kid = cUNOPo->op_first;
a0d0e21e
LW		 4896 newop = kUNOP->op_first->op_sibling;
4897 if (newop &&
4898 (newop->op_sibling ||
22c35a8c 4899 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4900 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4901 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4902
11343788 4903 return o;
a0d0e21e
LW		 4904 }
4905 op_free(kUNOP->op_first);
4906 kUNOP->op_first = newop;
4907 }
22c35a8c 4908 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4909 return ck_fun(o);
a0d0e21e
LW		 4910}
4911
4912OP *
cea2e8a9 4913Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4914{
11343788 4915 o = ck_fun(o);
5dc0d613 4916 o->op_private = 0;
11343788
MB		 4917 if (o->op_flags & OPf_KIDS) {
4918 OP *kid = cUNOPo->op_first;
5f05dabc 4919 if (kid->op_type == OP_HSLICE)
5dc0d613 4920 o->op_private |= OPpSLICE;
5f05dabc 4921 else if (kid->op_type != OP_HELEM)
cea2e8a9 4922 Perl_croak(aTHX_ "%s argument is not a HASH element or slice",
22c35a8c 4923 PL_op_desc[o->op_type]);
a0d0e21e 4924 null(kid);
79072805 4925 }
11343788 4926 return o;
79072805
LW		 4927}
4928
4929OP *
cea2e8a9 4930Perl_ck_eof(pTHX_ OP *o)
79072805 4931{
11343788 4932 I32 type = o->op_type;
79072805 4933
11343788
MB		 4934 if (o->op_flags & OPf_KIDS) {
4935 if (cLISTOPo->op_first->op_type == OP_STUB) {
4936 op_free(o);
4937 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4938 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4939 }
11343788 4940 return ck_fun(o);
79072805 4941 }
11343788 4942 return o;
79072805
LW		 4943}
4944
4945OP *
cea2e8a9 4946Perl_ck_eval(pTHX_ OP *o)
79072805 4947{
3280af22 4948 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4949 if (o->op_flags & OPf_KIDS) {
4950 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4951
93a17b20 4952 if (!kid) {
11343788
MB		 4953 o->op_flags &= ~OPf_KIDS;
4954 null(o);
79072805
LW		 4955 }
4956 else if (kid->op_type == OP_LINESEQ) {
4957 LOGOP *enter;
4958
11343788
MB		 4959 kid->op_next = o->op_next;
4960 cUNOPo->op_first = 0;
4961 op_free(o);
79072805 4962
b7dc083c 4963 NewOp(1101, enter, 1, LOGOP);
79072805 4964 enter->op_type = OP_ENTERTRY;
22c35a8c 4965 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4966 enter->op_private = 0;
4967
4968 /* establish postfix order */
4969 enter->op_next = (OP*)enter;
4970
11343788
MB		 4971 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4972 o->op_type = OP_LEAVETRY;
22c35a8c 4973 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4974 enter->op_other = o;
4975 return o;
79072805 4976 }
c7cc6f1c 4977 else
473986ff 4978 scalar((OP*)kid);
79072805
LW		 4979 }
4980 else {
11343788 4981 op_free(o);
54b9620d 4982 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4983 }
3280af22 4984 o->op_targ = (PADOFFSET)PL_hints;
11343788 4985 return o;
79072805
LW		 4986}
4987
4988OP *
cea2e8a9 4989Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 4990{
4991 OP *kid;
11343788
MB		 4992 if (o->op_flags & OPf_STACKED) {
4993 o = ck_fun(o);
4994 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4995 if (kid->op_type == OP_RV2GV)
4996 null(kid);
79072805 4997 }
463ee0b2 4998 else
11343788
MB		 4999 o = listkids(o);
5000 return o;
79072805
LW		 5001}
5002
5003OP *
cea2e8a9 5004Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5005{
5196be3e
MB		 5006 o = ck_fun(o);
5007 if (o->op_flags & OPf_KIDS) {
5008 OP *kid = cUNOPo->op_first;
5f05dabc 5009 if (kid->op_type != OP_HELEM)
cea2e8a9 5010 Perl_croak(aTHX_ "%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 5011 null(kid);
5012 }
5196be3e 5013 return o;
5f05dabc 5014}
5015
22c35a8c 5016#if 0
5f05dabc 5017OP *
cea2e8a9 5018Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5019{
5020 o = fold_constants(o);
5021 if (o->op_type == OP_CONST)
5022 o->op_type = OP_GV;
5023 return o;
5024}
22c35a8c 5025#endif
79072805
LW		 5026
5027OP *
cea2e8a9 5028Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5029{
11343788
MB		 5030 dTHR;
5031 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5032
3280af22 5033 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5034 if (kid->op_type == OP_CONST) {
44a8e56a 5035 char *name;
5036 int iscv;
5037 GV *gv;
779c5bc9 5038 SV *kidsv = kid->op_sv;
2d8e6c8d 5039 STRLEN n_a;
44a8e56a 5040
779c5bc9
GS		 5041 /* Is it a constant from cv_const_sv()? */
5042 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5043 SV *rsv = SvRV(kidsv);
5044 int svtype = SvTYPE(rsv);
5045 char *badtype = Nullch;
5046
5047 switch (o->op_type) {
5048 case OP_RV2SV:
5049 if (svtype > SVt_PVMG)
5050 badtype = "a SCALAR";
5051 break;
5052 case OP_RV2AV:
5053 if (svtype != SVt_PVAV)
5054 badtype = "an ARRAY";
5055 break;
5056 case OP_RV2HV:
5057 if (svtype != SVt_PVHV) {
5058 if (svtype == SVt_PVAV) { /* pseudohash? */
5059 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5060 if (ksv && SvROK(*ksv)
5061 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5062 {
5063 break;
5064 }
5065 }
5066 badtype = "a HASH";
5067 }
5068 break;
5069 case OP_RV2CV:
5070 if (svtype != SVt_PVCV)
5071 badtype = "a CODE";
5072 break;
5073 }
5074 if (badtype)
cea2e8a9 5075 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5076 return o;
5077 }
2d8e6c8d 5078 name = SvPV(kidsv, n_a);
3280af22 5079 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5080 char *badthing = Nullch;
5dc0d613 5081 switch (o->op_type) {
44a8e56a 5082 case OP_RV2SV:
5083 badthing = "a SCALAR";
5084 break;
5085 case OP_RV2AV:
5086 badthing = "an ARRAY";
5087 break;
5088 case OP_RV2HV:
5089 badthing = "a HASH";
5090 break;
5091 }
5092 if (badthing)
cea2e8a9 5093 Perl_croak(aTHX_
44a8e56a 5094 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5095 name, badthing);
5096 }
93233ece
CS		 5097 /*
5098 * This is a little tricky. We only want to add the symbol if we
5099 * didn't add it in the lexer. Otherwise we get duplicate strict
5100 * warnings. But if we didn't add it in the lexer, we must at
5101 * least pretend like we wanted to add it even if it existed before,
5102 * or we get possible typo warnings. OPpCONST_ENTERED says
5103 * whether the lexer already added THIS instance of this symbol.
5104 */
5196be3e 5105 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5106 do {
44a8e56a 5107 gv = gv_fetchpv(name,
748a9306 5108 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5109 iscv
5110 ? SVt_PVCV
11343788 5111 : o->op_type == OP_RV2SV
a0d0e21e 5112 ? SVt_PV
11343788 5113 : o->op_type == OP_RV2AV
a0d0e21e 5114 ? SVt_PVAV
11343788 5115 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5116 ? SVt_PVHV
5117 : SVt_PVGV);
93233ece
CS		 5118 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5119 if (gv) {
5120 kid->op_type = OP_GV;
5121 SvREFCNT_dec(kid->op_sv);
350de78d 5122#ifdef USE_ITHREADS
638eceb6 5123 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5124 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5125 GvIN_PAD_on(gv);
350de78d
GS		 5126 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5127#else
93233ece 5128 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5129#endif
76cd736e 5130 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5131 }
79072805 5132 }
11343788 5133 return o;
79072805
LW		 5134}
5135
5136OP *
cea2e8a9 5137Perl_ck_ftst(pTHX_ OP *o)
79072805 5138{
11343788
MB		 5139 dTHR;
5140 I32 type = o->op_type;
79072805 5141
d0dca557
JD		 5142 if (o->op_flags & OPf_REF) {
5143 /* nothing */
5144 }
5145 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5146 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5147
5148 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5149 STRLEN n_a;
a0d0e21e 5150 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5151 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5152 op_free(o);
d0dca557 5153 o = newop;
79072805
LW		 5154 }
5155 }
5156 else {
11343788 5157 op_free(o);
79072805 5158 if (type == OP_FTTTY)
d0dca557 5159 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5160 SVt_PVIO));
79072805 5161 else
d0dca557 5162 o = newUNOP(type, 0, newDEFSVOP());
79072805 5163 }
d0dca557
JD		 5164#ifdef USE_LOCALE
5165 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5166 o->op_private = 0;
5167 if (PL_hints & HINT_LOCALE)
5168 o->op_private |= OPpLOCALE;
5169 }
5170#endif
11343788 5171 return o;
79072805
LW		 5172}
5173
5174OP *
cea2e8a9 5175Perl_ck_fun(pTHX_ OP *o)
79072805 5176{
11343788 5177 dTHR;
79072805
LW		 5178 register OP *kid;
5179 OP **tokid;
5180 OP *sibl;
5181 I32 numargs = 0;
11343788 5182 int type = o->op_type;
22c35a8c 5183 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5184
11343788 5185 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5186 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5187 oa &= ~OA_OPTIONAL;
5188 else
11343788 5189 return no_fh_allowed(o);
79072805
LW		 5190 }
5191
11343788 5192 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5193 STRLEN n_a;
11343788
MB		 5194 tokid = &cLISTOPo->op_first;
5195 kid = cLISTOPo->op_first;
8990e307
LW		 5196 if (kid->op_type == OP_PUSHMARK ||
5197 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
5198 {
79072805
LW		 5199 tokid = &kid->op_sibling;
5200 kid = kid->op_sibling;
5201 }
22c35a8c 5202 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5203 *tokid = kid = newDEFSVOP();
79072805
LW		 5204
5205 while (oa && kid) {
5206 numargs++;
5207 sibl = kid->op_sibling;
5208 switch (oa & 7) {
5209 case OA_SCALAR:
62c18ce2
GS		 5210 /* list seen where single (scalar) arg expected? */
5211 if (numargs == 1 && !(oa >> 4)
5212 && kid->op_type == OP_LIST && type != OP_SCALAR)
5213 {
5214 return too_many_arguments(o,PL_op_desc[type]);
5215 }
79072805
LW		 5216 scalar(kid);
5217 break;
5218 case OA_LIST:
5219 if (oa < 16) {
5220 kid = 0;
5221 continue;
5222 }
5223 else
5224 list(kid);
5225 break;
5226 case OA_AVREF:
5227 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5228 (kid->op_private & OPpCONST_BARE))
5229 {
2d8e6c8d 5230 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5231 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5232 gv_fetchpv(name, TRUE, SVt_PVAV) ));
b9c39e73 5233 if (ckWARN(WARN_SYNTAX))
cf2093f6 5234 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5235 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5236 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5237 op_free(kid);
5238 kid = newop;
5239 kid->op_sibling = sibl;
5240 *tokid = kid;
5241 }
8990e307 5242 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5243 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5244 mod(kid, type);
79072805
LW		 5245 break;
5246 case OA_HVREF:
5247 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5248 (kid->op_private & OPpCONST_BARE))
5249 {
2d8e6c8d 5250 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5251 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5252 gv_fetchpv(name, TRUE, SVt_PVHV) ));
b9c39e73 5253 if (ckWARN(WARN_SYNTAX))
cf2093f6 5254 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5255 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5256 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5257 op_free(kid);
5258 kid = newop;
5259 kid->op_sibling = sibl;
5260 *tokid = kid;
5261 }
8990e307 5262 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5263 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5264 mod(kid, type);
79072805
LW		 5265 break;
5266 case OA_CVREF:
5267 {
a0d0e21e 5268 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5269 kid->op_sibling = 0;
5270 linklist(kid);
5271 newop->op_next = newop;
5272 kid = newop;
5273 kid->op_sibling = sibl;
5274 *tokid = kid;
5275 }
5276 break;
5277 case OA_FILEREF:
c340be78 5278 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5279 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5280 (kid->op_private & OPpCONST_BARE))
5281 {
79072805 5282 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5283 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5284 SVt_PVIO) );
79072805
LW		 5285 op_free(kid);
5286 kid = newop;
5287 }
1ea32a52
GS		 5288 else if (kid->op_type == OP_READLINE) {
5289 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5290 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5291 }
79072805 5292 else {
35cd451c 5293 I32 flags = OPf_SPECIAL;
a6c40364 5294 I32 priv = 0;
2c8ac474
GS		 5295 PADOFFSET targ = 0;
5296
35cd451c 5297 /* is this op a FH constructor? */
853846ea 5298 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5299 char *name = Nullch;
5300 STRLEN len;
5301
5302 flags = 0;
5303 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5304 * need to "prove" flag does not mean something
5305 * else already - NI-S 1999/05/07
2c8ac474
GS		 5306 */
5307 priv = OPpDEREF;
5308 if (kid->op_type == OP_PADSV) {
5309 SV **namep = av_fetch(PL_comppad_name,
5310 kid->op_targ, 4);
5311 if (namep && *namep)
5312 name = SvPV(*namep, len);
5313 }
5314 else if (kid->op_type == OP_RV2SV
5315 && kUNOP->op_first->op_type == OP_GV)
5316 {
5317 GV *gv = cGVOPx_gv(kUNOP->op_first);
5318 name = GvNAME(gv);
5319 len = GvNAMELEN(gv);
5320 }
5321 if (name) {
5322 SV *namesv;
5323 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5324 namesv = PL_curpad[targ];
5325 SvUPGRADE(namesv, SVt_PV);
5326 if (*name != '$')
5327 sv_setpvn(namesv, "$", 1);
5328 sv_catpvn(namesv, name, len);
5329 }
853846ea 5330 }
79072805 5331 kid->op_sibling = 0;
35cd451c 5332 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5333 kid->op_targ = targ;
5334 kid->op_private |= priv;
79072805
LW		 5335 }
5336 kid->op_sibling = sibl;
5337 *tokid = kid;
5338 }
5339 scalar(kid);
5340 break;
5341 case OA_SCALARREF:
a0d0e21e 5342 mod(scalar(kid), type);
79072805
LW		 5343 break;
5344 }
5345 oa >>= 4;
5346 tokid = &kid->op_sibling;
5347 kid = kid->op_sibling;
5348 }
11343788 5349 o->op_private |= numargs;
79072805 5350 if (kid)
22c35a8c 5351 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5352 listkids(o);
79072805 5353 }
22c35a8c 5354 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5355 op_free(o);
54b9620d 5356 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5357 }
5358
79072805
LW		 5359 if (oa) {
5360 while (oa & OA_OPTIONAL)
5361 oa >>= 4;
5362 if (oa && oa != OA_LIST)
22c35a8c 5363 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5364 }
11343788 5365 return o;
79072805
LW		 5366}
5367
5368OP *
cea2e8a9 5369Perl_ck_glob(pTHX_ OP *o)
79072805 5370{
fb73857a 5371 GV *gv;
5372
1f2bfc8a 5373 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5374 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5375
5376 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5377 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5378
52bb0670 5379#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5380 /* XXX this can be tightened up and made more failsafe. */
5381 if (!gv) {
5382 OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
5383 modname->op_private |= OPpCONST_BARE;
5384 ENTER;
5385 utilize(1, start_subparse(FALSE, 0), Nullop, modname,
220398a0 5386 newSVOP(OP_CONST, 0, newSVpvn(":globally", 9)));
72b16652
GS		 5387 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5388 LEAVE;
5389 }
52bb0670 5390#endif /* PERL_EXTERNAL_GLOB */
72b16652 5391
b1cb66bf 5392 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5393 append_elem(OP_GLOB, o,
80252599 5394 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5395 o->op_type = OP_LIST;
22c35a8c 5396 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5397 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5398 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5399 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5400 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5401 scalar(newUNOP(OP_RV2CV, 0,
5402 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5403 o = newUNOP(OP_NULL, 0, ck_subr(o));
5404 o->op_targ = OP_GLOB; /* hint at what it used to be */
5405 return o;
b1cb66bf 5406 }
5407 gv = newGVgen("main");
a0d0e21e 5408 gv_IOadd(gv);
11343788
MB		 5409 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5410 scalarkids(o);
5411 return ck_fun(o);
79072805
LW		 5412}
5413
5414OP *
cea2e8a9 5415Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5416{
5417 LOGOP *gwop;
5418 OP *kid;
11343788 5419 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5420
22c35a8c 5421 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5422 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5423
11343788 5424 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5425 OP* k;
11343788
MB		 5426 o = ck_sort(o);
5427 kid = cLISTOPo->op_first->op_sibling;
5428 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5429 kid = k;
5430 }
5431 kid->op_next = (OP*)gwop;
11343788 5432 o->op_flags &= ~OPf_STACKED;
93a17b20 5433 }
11343788 5434 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5435 if (type == OP_MAPWHILE)
5436 list(kid);
5437 else
5438 scalar(kid);
11343788 5439 o = ck_fun(o);
3280af22 5440 if (PL_error_count)
11343788 5441 return o;
aeea060c 5442 kid = cLISTOPo->op_first->op_sibling;
79072805 5443 if (kid->op_type != OP_NULL)
cea2e8a9 5444 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5445 kid = kUNOP->op_first;
5446
a0d0e21e 5447 gwop->op_type = type;
22c35a8c 5448 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5449 gwop->op_first = listkids(o);
79072805
LW		 5450 gwop->op_flags |= OPf_KIDS;
5451 gwop->op_private = 1;
5452 gwop->op_other = LINKLIST(kid);
a0d0e21e 5453 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5454 kid->op_next = (OP*)gwop;
5455
11343788 5456 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5457 if (!kid || !kid->op_sibling)
22c35a8c 5458 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5459 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5460 mod(kid, OP_GREPSTART);
5461
79072805
LW		 5462 return (OP*)gwop;
5463}
5464
5465OP *
cea2e8a9 5466Perl_ck_index(pTHX_ OP *o)
79072805 5467{
11343788
MB		 5468 if (o->op_flags & OPf_KIDS) {
5469 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5470 if (kid)
5471 kid = kid->op_sibling; /* get past "big" */
79072805 5472 if (kid && kid->op_type == OP_CONST)
2779dcf1 5473 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5474 }
11343788 5475 return ck_fun(o);
79072805
LW		 5476}
5477
5478OP *
cea2e8a9 5479Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5480{
5481 /* XXX length optimization goes here */
11343788 5482 return ck_fun(o);
79072805
LW		 5483}
5484
5485OP *
cea2e8a9 5486Perl_ck_lfun(pTHX_ OP *o)
79072805 5487{
5dc0d613
MB		 5488 OPCODE type = o->op_type;
5489 return modkids(ck_fun(o), type);
79072805
LW		 5490}
5491
5492OP *
cea2e8a9 5493Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5494{
20ce7b12 5495 dTHR;
d0334bed
GS		 5496 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5497 switch (cUNOPo->op_first->op_type) {
5498 case OP_RV2AV:
7e291ef1 5499 break; /* Globals via GV can be undef */
d0334bed
GS		 5500 case OP_PADAV:
5501 case OP_AASSIGN: /* Is this a good idea? */
5502 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5503 "defined(@array) is deprecated");
d0334bed
GS		 5504 Perl_warner(aTHX_ WARN_DEPRECATED,
5505 "(Maybe you should just omit the defined()?)\n");
69794302 5506 break;
d0334bed 5507 case OP_RV2HV:
7e291ef1 5508 break; /* Globals via GV can be undef */
d0334bed
GS		 5509 case OP_PADHV:
5510 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5511 "defined(%hash) is deprecated");
d0334bed
GS		 5512 Perl_warner(aTHX_ WARN_DEPRECATED,
5513 "(Maybe you should just omit the defined()?)\n");
5514 break;
5515 default:
5516 /* no warning */
5517 break;
5518 }
69794302
MJD		 5519 }
5520 return ck_rfun(o);
5521}
5522
5523OP *
cea2e8a9 5524Perl_ck_rfun(pTHX_ OP *o)
8990e307 5525{
5dc0d613
MB		 5526 OPCODE type = o->op_type;
5527 return refkids(ck_fun(o), type);
8990e307
LW		 5528}
5529
5530OP *
cea2e8a9 5531Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5532{
5533 register OP *kid;
aeea060c 5534
11343788 5535 kid = cLISTOPo->op_first;
79072805 5536 if (!kid) {
11343788
MB		 5537 o = force_list(o);
5538 kid = cLISTOPo->op_first;
79072805
LW		 5539 }
5540 if (kid->op_type == OP_PUSHMARK)
5541 kid = kid->op_sibling;
11343788 5542 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5543 kid = kid->op_sibling;
5544 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5545 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5546 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5547 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5548 cLISTOPo->op_first->op_sibling = kid;
5549 cLISTOPo->op_last = kid;
79072805
LW		 5550 kid = kid->op_sibling;
5551 }
5552 }
5553
5554 if (!kid)
54b9620d 5555 append_elem(o->op_type, o, newDEFSVOP());
79072805 5556
5dc0d613 5557 o = listkids(o);
bbce6d69 5558
5dc0d613 5559 o->op_private = 0;
36477c24 5560#ifdef USE_LOCALE
3280af22 5561 if (PL_hints & HINT_LOCALE)
5dc0d613 5562 o->op_private |= OPpLOCALE;
bbce6d69 5563#endif
5564
5dc0d613 5565 return o;
bbce6d69 5566}
5567
5568OP *
cea2e8a9 5569Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5570{
5dc0d613 5571 o = ck_fun(o);
bbce6d69 5572
5dc0d613 5573 o->op_private = 0;
36477c24 5574#ifdef USE_LOCALE
3280af22 5575 if (PL_hints & HINT_LOCALE)
5dc0d613 5576 o->op_private |= OPpLOCALE;
bbce6d69 5577#endif
5578
5dc0d613 5579 return o;
bbce6d69 5580}
5581
5582OP *
b162f9ea
IZ		 5583Perl_ck_sassign(pTHX_ OP *o)
5584{
5585 OP *kid = cLISTOPo->op_first;
5586 /* has a disposable target? */
5587 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5588 && !(kid->op_flags & OPf_STACKED))
5589 {
5590 OP *kkid = kid->op_sibling;
5591
5592 /* Can just relocate the target. */
2c2d71f5
JH		 5593 if (kkid && kkid->op_type == OP_PADSV
5594 && !(kkid->op_private & OPpLVAL_INTRO))
5595 {
b162f9ea 5596 /* Concat has problems if target is equal to right arg. */
3dbf192b
IZ		 5597 if (kid->op_type == OP_CONCAT) {
5598 if (kLISTOP->op_first->op_sibling->op_type == OP_PADSV
5599 && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
5600 return o;
b162f9ea 5601 }
3dbf192b
IZ		 5602 else if (kid->op_type == OP_JOIN) {
5603 /* do_join has problems if the arguments coincide with target.
c212fd85
IZ		 5604 In fact the second argument *can* safely coincide,
5605 but ignore=pessimize this rare occasion. */
5606 OP *arg = kLISTOP->op_first->op_sibling; /* Skip PUSHMARK */
5607
5608 while (arg) {
5609 if (arg->op_type == OP_PADSV
5610 && arg->op_targ == kkid->op_targ)
5611 return o;
5612 arg = arg->op_sibling;
5613 }
5614 }
3dbf192b
IZ		 5615 else if (kid->op_type == OP_QUOTEMETA) {
5616 /* quotemeta has problems if the argument coincides with target. */
5617 if (kLISTOP->op_first->op_type == OP_PADSV
5618 && kLISTOP->op_first->op_targ == kkid->op_targ)
5619 return o;
5620 }
b162f9ea 5621 kid->op_targ = kkid->op_targ;
743e66e6 5622 kkid->op_targ = 0;
b162f9ea
IZ		 5623 /* Now we do not need PADSV and SASSIGN. */
5624 kid->op_sibling = o->op_sibling; /* NULL */
5625 cLISTOPo->op_first = NULL;
5626 op_free(o);
5627 op_free(kkid);
5628 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5629 return kid;
5630 }
5631 }
5632 return o;
5633}
5634
5635OP *
cea2e8a9 5636Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5637{
5dc0d613 5638 o->op_private = 0;
36477c24 5639#ifdef USE_LOCALE
3280af22 5640 if (PL_hints & HINT_LOCALE)
5dc0d613 5641 o->op_private |= OPpLOCALE;
bbce6d69 5642#endif
36477c24 5643
5dc0d613 5644 return o;
79072805
LW		 5645}
5646
5647OP *
cea2e8a9 5648Perl_ck_match(pTHX_ OP *o)
79072805 5649{
5dc0d613 5650 o->op_private |= OPpRUNTIME;
11343788 5651 return o;
79072805
LW		 5652}
5653
5654OP *
f5d5a27c
CS		 5655Perl_ck_method(pTHX_ OP *o)
5656{
5657 OP *kid = cUNOPo->op_first;
5658 if (kid->op_type == OP_CONST) {
5659 SV* sv = kSVOP->op_sv;
5660 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5661 OP *cmop;
5662 sv_upgrade(sv, SVt_PVIV);
5663 SvIOK_on(sv);
5664 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5665 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5666 kSVOP->op_sv = Nullsv;
5667 op_free(o);
5668 return cmop;
5669 }
5670 }
5671 return o;
5672}
5673
5674OP *
cea2e8a9 5675Perl_ck_null(pTHX_ OP *o)
79072805 5676{
11343788 5677 return o;
79072805
LW		 5678}
5679
5680OP *
cea2e8a9 5681Perl_ck_repeat(pTHX_ OP *o)
79072805 5682{
11343788
MB		 5683 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5684 o->op_private |= OPpREPEAT_DOLIST;
5685 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5686 }
5687 else
11343788
MB		 5688 scalar(o);
5689 return o;
79072805
LW		 5690}
5691
5692OP *
cea2e8a9 5693Perl_ck_require(pTHX_ OP *o)
8990e307 5694{
11343788
MB		 5695 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5696 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5697
5698 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5699 char *s;
a0d0e21e
LW		 5700 for (s = SvPVX(kid->op_sv); *s; s++) {
5701 if (*s == ':' && s[1] == ':') {
5702 *s = '/';
1aef975c 5703 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5704 --SvCUR(kid->op_sv);
5705 }
8990e307 5706 }
a0d0e21e 5707 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5708 }
5709 }
11343788 5710 return ck_fun(o);
8990e307
LW		 5711}
5712
22c35a8c 5713#if 0
8990e307 5714OP *
cea2e8a9 5715Perl_ck_retarget(pTHX_ OP *o)
79072805 5716{
cea2e8a9 5717 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5718 /* STUB */
11343788 5719 return o;
79072805 5720}
22c35a8c 5721#endif
79072805
LW		 5722
5723OP *
cea2e8a9 5724Perl_ck_select(pTHX_ OP *o)
79072805 5725{
c07a80fd 5726 OP* kid;
11343788
MB		 5727 if (o->op_flags & OPf_KIDS) {
5728 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5729 if (kid && kid->op_sibling) {
11343788 5730 o->op_type = OP_SSELECT;
22c35a8c 5731 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5732 o = ck_fun(o);
5733 return fold_constants(o);
79072805
LW		 5734 }
5735 }
11343788
MB		 5736 o = ck_fun(o);
5737 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5738 if (kid && kid->op_type == OP_RV2GV)
5739 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5740 return o;
79072805
LW		 5741}
5742
5743OP *
cea2e8a9 5744Perl_ck_shift(pTHX_ OP *o)
79072805 5745{
11343788 5746 I32 type = o->op_type;
79072805 5747
11343788 5748 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5749 OP *argop;
5750
11343788 5751 op_free(o);
6d4ff0d2 5752#ifdef USE_THREADS
533c011a 5753 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5754 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5755 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5756 }
5757 else {
5758 argop = newUNOP(OP_RV2AV, 0,
5759 scalar(newGVOP(OP_GV, 0,
5760 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5761 }
5762#else
5763 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5764 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5765 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5766#endif /* USE_THREADS */
5767 return newUNOP(type, 0, scalar(argop));
79072805 5768 }
11343788 5769 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5770}
5771
5772OP *
cea2e8a9 5773Perl_ck_sort(pTHX_ OP *o)
79072805 5774{
5dc0d613 5775 o->op_private = 0;
36477c24 5776#ifdef USE_LOCALE
3280af22 5777 if (PL_hints & HINT_LOCALE)
5dc0d613 5778 o->op_private |= OPpLOCALE;
bbce6d69 5779#endif
5780
9ea6e965 5781 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5782 simplify_sort(o);
9c007264 5783 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5784 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5785 OP *k;
82092f1d 5786 kid = kUNOP->op_first; /* get past null */
79072805 5787
463ee0b2 5788 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5789 linklist(kid);
463ee0b2
LW		 5790 if (kid->op_type == OP_SCOPE) {
5791 k = kid->op_next;
5792 kid->op_next = 0;
79072805 5793 }
463ee0b2 5794 else if (kid->op_type == OP_LEAVE) {
11343788 5795 if (o->op_type == OP_SORT) {
748a9306
LW		 5796 null(kid); /* wipe out leave */
5797 kid->op_next = kid;
463ee0b2 5798
748a9306
LW		 5799 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5800 if (k->op_next == kid)
5801 k->op_next = 0;
5802 }
463ee0b2 5803 }
748a9306
LW		 5804 else
5805 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5806 k = kLISTOP->op_first;
463ee0b2 5807 }
a0d0e21e
LW		 5808 peep(k);
5809
11343788 5810 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5811 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5812 kid->op_next = kid;
5813 else
5814 kid->op_next = k;
11343788 5815 o->op_flags |= OPf_SPECIAL;
79072805 5816 }
c6e96bcb
GS		 5817 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5818 null(cLISTOPo->op_first->op_sibling);
79072805 5819 }
bbce6d69 5820
11343788 5821 return o;
79072805 5822}
bda4119b
GS		 5823
5824STATIC void
cea2e8a9 5825S_simplify_sort(pTHX_ OP *o)
9c007264 5826{
51a19bc0 5827 dTHR;
9c007264
JH		 5828 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5829 OP *k;
5830 int reversed;
350de78d 5831 GV *gv;
9c007264
JH		 5832 if (!(o->op_flags & OPf_STACKED))
5833 return;
9ea6e965
GS		 5834 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5835 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5836 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5837 if (kid->op_type != OP_SCOPE)
5838 return;
5839 kid = kLISTOP->op_last; /* get past scope */
5840 switch(kid->op_type) {
5841 case OP_NCMP:
5842 case OP_I_NCMP:
5843 case OP_SCMP:
5844 break;
5845 default:
5846 return;
5847 }
5848 k = kid; /* remember this node*/
5849 if (kBINOP->op_first->op_type != OP_RV2SV)
5850 return;
5851 kid = kBINOP->op_first; /* get past cmp */
5852 if (kUNOP->op_first->op_type != OP_GV)
5853 return;
5854 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5855 gv = kGVOP_gv;
350de78d 5856 if (GvSTASH(gv) != PL_curstash)
9c007264 5857 return;
350de78d 5858 if (strEQ(GvNAME(gv), "a"))
9c007264 5859 reversed = 0;
350de78d 5860 else if(strEQ(GvNAME(gv), "b"))
9c007264
JH		 5861 reversed = 1;
5862 else
5863 return;
5864 kid = k; /* back to cmp */
5865 if (kBINOP->op_last->op_type != OP_RV2SV)
5866 return;
5867 kid = kBINOP->op_last; /* down to 2nd arg */
5868 if (kUNOP->op_first->op_type != OP_GV)
5869 return;
5870 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 5871 gv = kGVOP_gv;
350de78d 5872 if (GvSTASH(gv) != PL_curstash
9c007264 5873 || ( reversed
350de78d
GS		 5874 ? strNE(GvNAME(gv), "a")
5875 : strNE(GvNAME(gv), "b")))
9c007264
JH		 5876 return;
5877 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5878 if (reversed)
5879 o->op_private |= OPpSORT_REVERSE;
5880 if (k->op_type == OP_NCMP)
5881 o->op_private |= OPpSORT_NUMERIC;
5882 if (k->op_type == OP_I_NCMP)
5883 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5884 kid = cLISTOPo->op_first->op_sibling;
5885 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5886 op_free(kid); /* then delete it */
5887 cLISTOPo->op_children--;
9c007264 5888}
79072805
LW		 5889
5890OP *
cea2e8a9 5891Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5892{
5893 register OP *kid;
aeea060c 5894
11343788
MB		 5895 if (o->op_flags & OPf_STACKED)
5896 return no_fh_allowed(o);
79072805 5897
11343788 5898 kid = cLISTOPo->op_first;
8990e307 5899 if (kid->op_type != OP_NULL)
cea2e8a9 5900 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5901 kid = kid->op_sibling;
11343788
MB		 5902 op_free(cLISTOPo->op_first);
5903 cLISTOPo->op_first = kid;
85e6fe83 5904 if (!kid) {
79cb57f6 5905 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5906 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5907 }
79072805
LW		 5908
5909 if (kid->op_type != OP_MATCH) {
5910 OP *sibl = kid->op_sibling;
463ee0b2 5911 kid->op_sibling = 0;
79072805 5912 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5913 if (cLISTOPo->op_first == cLISTOPo->op_last)
5914 cLISTOPo->op_last = kid;
5915 cLISTOPo->op_first = kid;
79072805
LW		 5916 kid->op_sibling = sibl;
5917 }
5918
5919 kid->op_type = OP_PUSHRE;
22c35a8c 5920 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5921 scalar(kid);
5922
5923 if (!kid->op_sibling)
54b9620d 5924 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5925
5926 kid = kid->op_sibling;
5927 scalar(kid);
5928
5929 if (!kid->op_sibling)
11343788 5930 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5931
5932 kid = kid->op_sibling;
5933 scalar(kid);
5934
5935 if (kid->op_sibling)
22c35a8c 5936 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5937
11343788 5938 return o;
79072805
LW		 5939}
5940
5941OP *
eb6e2d6f
GS		 5942Perl_ck_join(pTHX_ OP *o)
5943{
5944 if (ckWARN(WARN_SYNTAX)) {
5945 OP *kid = cLISTOPo->op_first->op_sibling;
5946 if (kid && kid->op_type == OP_MATCH) {
5947 char *pmstr = "STRING";
5948 if (kPMOP->op_pmregexp)
5949 pmstr = kPMOP->op_pmregexp->precomp;
5950 Perl_warner(aTHX_ WARN_SYNTAX,
5951 "/%s/ should probably be written as \"%s\"",
5952 pmstr, pmstr);
5953 }
5954 }
5955 return ck_fun(o);
5956}
5957
5958OP *
cea2e8a9 5959Perl_ck_subr(pTHX_ OP *o)
79072805 5960{
11343788
MB		 5961 dTHR;
5962 OP *prev = ((cUNOPo->op_first->op_sibling)
5963 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5964 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5965 OP *cvop;
5966 char *proto = 0;
5967 CV *cv = 0;
46fc3d4c 5968 GV *namegv = 0;
4633a7c4
LW		 5969 int optional = 0;
5970 I32 arg = 0;
2d8e6c8d 5971 STRLEN n_a;
4633a7c4 5972
d3011074 5973 o->op_private |= OPpENTERSUB_HASTARG;
11343788 5974 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5975 if (cvop->op_type == OP_RV2CV) {
5976 SVOP* tmpop;
11343788 5977 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5978 null(cvop); /* disable rv2cv */
5979 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 5980 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 5981 GV *gv = cGVOPx_gv(tmpop);
350de78d 5982 cv = GvCVu(gv);
76cd736e
GS		 5983 if (!cv)
5984 tmpop->op_private |= OPpEARLY_CV;
5985 else if (SvPOK(cv)) {
350de78d 5986 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 5987 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5988 }
4633a7c4
LW		 5989 }
5990 }
f5d5a27c 5991 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 5992 if (o2->op_type == OP_CONST)
5993 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 5994 else if (o2->op_type == OP_LIST) {
5995 OP *o = ((UNOP*)o2)->op_first->op_sibling;
5996 if (o && o->op_type == OP_CONST)
5997 o->op_private &= ~OPpCONST_STRICT;
5998 }
7a52d87a 5999 }
3280af22
NIS		 6000 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6001 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6002 o->op_private |= OPpENTERSUB_DB;
6003 while (o2 != cvop) {
4633a7c4
LW		 6004 if (proto) {
6005 switch (*proto) {
6006 case '\0':
5dc0d613 6007 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6008 case ';':
6009 optional = 1;
6010 proto++;
6011 continue;
6012 case '$':
6013 proto++;
6014 arg++;
11343788 6015 scalar(o2);
4633a7c4
LW		 6016 break;
6017 case '%':
6018 case '@':
11343788 6019 list(o2);
4633a7c4
LW		 6020 arg++;
6021 break;
6022 case '&':
6023 proto++;
6024 arg++;
11343788 6025 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6026 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6027 break;
6028 case '*':
2ba6ecf4 6029 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6030 proto++;
6031 arg++;
11343788 6032 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6033 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6034 else if (o2->op_type == OP_CONST)
6035 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6036 else if (o2->op_type == OP_ENTERSUB) {
6037 /* accidental subroutine, revert to bareword */
6038 OP *gvop = ((UNOP*)o2)->op_first;
6039 if (gvop && gvop->op_type == OP_NULL) {
6040 gvop = ((UNOP*)gvop)->op_first;
6041 if (gvop) {
6042 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6043 ;
6044 if (gvop &&
6045 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6046 (gvop = ((UNOP*)gvop)->op_first) &&
6047 gvop->op_type == OP_GV)
6048 {
638eceb6 6049 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6050 OP *sibling = o2->op_sibling;
2692f720 6051 SV *n = newSVpvn("",0);
9675f7ac 6052 op_free(o2);
2692f720
GS		 6053 gv_fullname3(n, gv, "");
6054 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6055 sv_chop(n, SvPVX(n)+6);
6056 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6057 prev->op_sibling = o2;
6058 o2->op_sibling = sibling;
6059 }
6060 }
6061 }
6062 }
2ba6ecf4
GS		 6063 scalar(o2);
6064 break;
4633a7c4
LW		 6065 case '\\':
6066 proto++;
6067 arg++;
6068 switch (*proto++) {
6069 case '*':
11343788 6070 if (o2->op_type != OP_RV2GV)
5dc0d613 6071 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6072 goto wrapref;
6073 case '&':
11343788 6074 if (o2->op_type != OP_RV2CV)
5dc0d613 6075 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6076 goto wrapref;
6077 case '$':
386acf99
GS		 6078 if (o2->op_type != OP_RV2SV
6079 && o2->op_type != OP_PADSV
1c01eb51
GS		 6080 && o2->op_type != OP_HELEM
6081 && o2->op_type != OP_AELEM
386acf99
GS		 6082 && o2->op_type != OP_THREADSV)
6083 {
5dc0d613 6084 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6085 }
4633a7c4
LW		 6086 goto wrapref;
6087 case '@':
11343788 6088 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6089 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6090 goto wrapref;
6091 case '%':
11343788 6092 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6093 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6094 wrapref:
6095 {
11343788 6096 OP* kid = o2;
6fa846a0 6097 OP* sib = kid->op_sibling;
4633a7c4 6098 kid->op_sibling = 0;
6fa846a0
GS		 6099 o2 = newUNOP(OP_REFGEN, 0, kid);
6100 o2->op_sibling = sib;
e858de61 6101 prev->op_sibling = o2;
4633a7c4
LW		 6102 }
6103 break;
6104 default: goto oops;
6105 }
6106 break;
b1cb66bf 6107 case ' ':
6108 proto++;
6109 continue;
4633a7c4
LW		 6110 default:
6111 oops:
cea2e8a9 6112 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6113 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6114 }
6115 }
6116 else
11343788
MB		 6117 list(o2);
6118 mod(o2, OP_ENTERSUB);
6119 prev = o2;
6120 o2 = o2->op_sibling;
4633a7c4 6121 }
fb73857a 6122 if (proto && !optional &&
6123 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6124 return too_few_arguments(o, gv_ename(namegv));
11343788 6125 return o;
79072805
LW		 6126}
6127
6128OP *
cea2e8a9 6129Perl_ck_svconst(pTHX_ OP *o)
8990e307 6130{
11343788
MB		 6131 SvREADONLY_on(cSVOPo->op_sv);
6132 return o;
8990e307
LW		 6133}
6134
6135OP *
cea2e8a9 6136Perl_ck_trunc(pTHX_ OP *o)
79072805 6137{
11343788
MB		 6138 if (o->op_flags & OPf_KIDS) {
6139 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6140
a0d0e21e
LW		 6141 if (kid->op_type == OP_NULL)
6142 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6143 if (kid && kid->op_type == OP_CONST &&
6144 (kid->op_private & OPpCONST_BARE))
6145 {
11343788 6146 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6147 kid->op_private &= ~OPpCONST_STRICT;
6148 }
79072805 6149 }
11343788 6150 return ck_fun(o);
79072805
LW		 6151}
6152
463ee0b2
LW		 6153/* A peephole optimizer. We visit the ops in the order they're to execute. */
6154
79072805 6155void
864dbfa3 6156Perl_peep(pTHX_ register OP *o)
79072805 6157{
11343788 6158 dTHR;
79072805 6159 register OP* oldop = 0;
2d8e6c8d 6160 STRLEN n_a;
cd06dffe 6161 OP *last_composite = Nullop;
2d8e6c8d 6162
a0d0e21e 6163 if (!o || o->op_seq)
79072805 6164 return;
a0d0e21e 6165 ENTER;
462e5cf6 6166 SAVEOP();
7766f137 6167 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6168 for (; o; o = o->op_next) {
6169 if (o->op_seq)
6170 break;
3280af22
NIS		 6171 if (!PL_op_seqmax)
6172 PL_op_seqmax++;
533c011a 6173 PL_op = o;
a0d0e21e 6174 switch (o->op_type) {
acb36ea4 6175 case OP_SETSTATE:
a0d0e21e
LW		 6176 case OP_NEXTSTATE:
6177 case OP_DBSTATE:
3280af22
NIS		 6178 PL_curcop = ((COP*)o); /* for warnings */
6179 o->op_seq = PL_op_seqmax++;
cd06dffe 6180 last_composite = Nullop;
a0d0e21e
LW		 6181 break;
6182
a0d0e21e 6183 case OP_CONST:
7a52d87a
GS		 6184 if (cSVOPo->op_private & OPpCONST_STRICT)
6185 no_bareword_allowed(o);
7766f137
GS		 6186#ifdef USE_ITHREADS
6187 /* Relocate sv to the pad for thread safety.
6188 * Despite being a "constant", the SV is written to,
6189 * for reference counts, sv_upgrade() etc. */
6190 if (cSVOP->op_sv) {
6191 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6192 SvREFCNT_dec(PL_curpad[ix]);
6193 SvPADTMP_on(cSVOPo->op_sv);
6194 PL_curpad[ix] = cSVOPo->op_sv;
6195 cSVOPo->op_sv = Nullsv;
6196 o->op_targ = ix;
6197 }
6198#endif
7a52d87a 6199 /* FALL THROUGH */
a0d0e21e
LW		 6200 case OP_UC:
6201 case OP_UCFIRST:
6202 case OP_LC:
6203 case OP_LCFIRST:
ed7ab888
GS		 6204 if ( o->op_next && o->op_next->op_type == OP_STRINGIFY
6205 && !(o->op_next->op_private & OPpTARGET_MY) )
6206 null(o->op_next);
6207 o->op_seq = PL_op_seqmax++;
6208 break;
6209 case OP_CONCAT:
6210 case OP_JOIN:
a0d0e21e 6211 case OP_QUOTEMETA:
b162f9ea
IZ		 6212 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6213 if (o->op_next->op_private & OPpTARGET_MY) {
ed7ab888 6214 if ((o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea
IZ		 6215 || (o->op_type == OP_CONCAT
6216 /* Concat has problems if target is equal to right arg. */
6217 && (((LISTOP*)o)->op_first->op_sibling->op_type
6218 == OP_PADSV)
6219 && (((LISTOP*)o)->op_first->op_sibling->op_targ
743e66e6
GS		 6220 == o->op_next->op_targ)))
6221 {
b162f9ea 6222 goto ignore_optimization;
cd06dffe
GS		 6223 }
6224 else {
b162f9ea 6225 o->op_targ = o->op_next->op_targ;
743e66e6 6226 o->op_next->op_targ = 0;
2c2d71f5 6227 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6228 }
6229 }
a0d0e21e 6230 null(o->op_next);
b162f9ea
IZ		 6231 }
6232 ignore_optimization:
3280af22 6233 o->op_seq = PL_op_seqmax++;
a0d0e21e 6234 break;
8990e307 6235 case OP_STUB:
54310121 6236 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6237 o->op_seq = PL_op_seqmax++;
54310121 6238 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6239 }
748a9306 6240 goto nothin;
79072805 6241 case OP_NULL:
acb36ea4
GS		 6242 if (o->op_targ == OP_NEXTSTATE
6243 || o->op_targ == OP_DBSTATE
6244 || o->op_targ == OP_SETSTATE)
6245 {
3280af22 6246 PL_curcop = ((COP*)o);
acb36ea4 6247 }
748a9306 6248 goto nothin;
79072805 6249 case OP_SCALAR:
93a17b20 6250 case OP_LINESEQ:
463ee0b2 6251 case OP_SCOPE:
748a9306 6252 nothin:
a0d0e21e
LW		 6253 if (oldop && o->op_next) {
6254 oldop->op_next = o->op_next;
79072805
LW		 6255 continue;
6256 }
3280af22 6257 o->op_seq = PL_op_seqmax++;
79072805
LW		 6258 break;
6259
6260 case OP_GV:
a0d0e21e 6261 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 6262 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 6263 null(o->op_next);
6264 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
6265 o->op_next = o->op_next->op_next;
6266 o->op_type = OP_GVSV;
22c35a8c 6267 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6268 }
6269 }
a0d0e21e
LW		 6270 else if (o->op_next->op_type == OP_RV2AV) {
6271 OP* pop = o->op_next->op_next;
6272 IV i;
8990e307 6273 if (pop->op_type == OP_CONST &&
533c011a 6274 (PL_op = pop->op_next) &&
8990e307 6275 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6276 !(pop->op_next->op_private &
68dc0745 6277 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6278 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6279 <= 255 &&
8990e307
LW		 6280 i >= 0)
6281 {
350de78d 6282 GV *gv;
a0d0e21e 6283 null(o->op_next);
8990e307
LW		 6284 null(pop->op_next);
6285 null(pop);
a0d0e21e
LW		 6286 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6287 o->op_next = pop->op_next->op_next;
6288 o->op_type = OP_AELEMFAST;
22c35a8c 6289 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6290 o->op_private = (U8)i;
638eceb6 6291 gv = cGVOPo_gv;
350de78d 6292 GvAVn(gv);
8990e307 6293 }
79072805 6294 }
76cd736e 6295 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
638eceb6 6296 GV *gv = cGVOPo_gv;
76cd736e
GS		 6297 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6298 /* XXX could check prototype here instead of just carping */
6299 SV *sv = sv_newmortal();
6300 gv_efullname3(sv, gv, Nullch);
6301 Perl_warner(aTHX_ WARN_UNSAFE,
6302 "%s() called too early to check prototype",
6303 SvPV_nolen(sv));
6304 }
6305 }
6306
3280af22 6307 o->op_seq = PL_op_seqmax++;
79072805
LW		 6308 break;
6309
a0d0e21e 6310 case OP_MAPWHILE:
79072805
LW		 6311 case OP_GREPWHILE:
6312 case OP_AND:
6313 case OP_OR:
2c2d71f5
JH		 6314 case OP_ANDASSIGN:
6315 case OP_ORASSIGN:
1a67a97c
SM		 6316 case OP_COND_EXPR:
6317 case OP_RANGE:
3280af22 6318 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6319 while (cLOGOP->op_other->op_type == OP_NULL)
6320 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6321 peep(cLOGOP->op_other);
6322 break;
6323
79072805 6324 case OP_ENTERLOOP:
3280af22 6325 o->op_seq = PL_op_seqmax++;
79072805
LW		 6326 peep(cLOOP->op_redoop);
6327 peep(cLOOP->op_nextop);
6328 peep(cLOOP->op_lastop);
6329 break;
6330
8782bef2 6331 case OP_QR:
79072805
LW		 6332 case OP_MATCH:
6333 case OP_SUBST:
3280af22 6334 o->op_seq = PL_op_seqmax++;
a0d0e21e 6335 peep(cPMOP->op_pmreplstart);
79072805
LW		 6336 break;
6337
a0d0e21e 6338 case OP_EXEC:
3280af22 6339 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6340 if (ckWARN(WARN_SYNTAX) && o->op_next
6341 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6342 if (o->op_next->op_sibling &&
20408e3c
GS		 6343 o->op_next->op_sibling->op_type != OP_EXIT &&
6344 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6345 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6346 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6347
57843af0 6348 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
cea2e8a9
GS		 6349 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
6350 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
57843af0 6351 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6352 }
6353 }
6354 break;
aeea060c 6355
c750a3ec
MB		 6356 case OP_HELEM: {
6357 UNOP *rop;
6358 SV *lexname;
6359 GV **fields;
6360 SV **svp, **indsvp;
6361 I32 ind;
6362 char *key;
6363 STRLEN keylen;
aeea060c 6364
377b21bb 6365 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6366 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6367 break;
6368 rop = (UNOP*)((BINOP*)o)->op_first;
6369 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6370 break;
3280af22 6371 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6372 if (!SvOBJECT(lexname))
6373 break;
5196be3e 6374 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6375 if (!fields || !GvHV(*fields))
6376 break;
638eceb6 6377 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6378 key = SvPV(*svp, keylen);
6379 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6380 if (!indsvp) {
88e9b055 6381 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6382 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6383 }
6384 ind = SvIV(*indsvp);
6385 if (ind < 1)
cea2e8a9 6386 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6387 rop->op_type = OP_RV2AV;
22c35a8c 6388 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6389 o->op_type = OP_AELEM;
22c35a8c 6390 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6391 SvREFCNT_dec(*svp);
6392 *svp = newSViv(ind);
6393 break;
6394 }
6395
cd06dffe
GS		 6396 case OP_RV2AV:
6397 case OP_RV2HV:
6398 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6399 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6400 {
cd06dffe 6401 last_composite = o;
e1f15930 6402 }
cd06dffe
GS		 6403 o->op_seq = PL_op_seqmax++;
6404 break;
6405
6406 case OP_RETURN:
970c4905 6407 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6408 o->op_seq = PL_op_seqmax++;
6409 break;
6410 }
6411 /* FALL THROUGH */
6412
6413 case OP_LEAVESUBLV:
6414 if (last_composite) {
6415 OP *r = last_composite;
6416
6417 while (r->op_sibling)
6418 r = r->op_sibling;
6419 if (r->op_next == o
6420 || (r->op_next->op_type == OP_LIST
6421 && r->op_next->op_next == o))
6422 {
6423 if (last_composite->op_type == OP_RV2AV)
6424 yyerror("Lvalue subs returning arrays not implemented yet");
6425 else
6426 yyerror("Lvalue subs returning hashes not implemented yet");
6427 ;
6428 }
6429 }
6430 /* FALL THROUGH */
6431
79072805 6432 default:
3280af22 6433 o->op_seq = PL_op_seqmax++;
79072805
LW		 6434 break;
6435 }
a0d0e21e 6436 oldop = o;
79072805 6437 }
a0d0e21e 6438 LEAVE;
79072805 6439}
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