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Comment upgrading: the quad situation isn't quite as
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
4eb8286e 3 * Copyright (c) 1991-1999, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805
LW		 20#include "perl.h"
21
b7dc083c
NIS		 22/* #define PL_OP_SLAB_ALLOC */
23
24#ifdef PL_OP_SLAB_ALLOC
25#define SLAB_SIZE 8192
26static char *PL_OpPtr = NULL;
27static int PL_OpSpace = 0;
28#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
29 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
30 else \
31 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
32 } while (0)
33
864dbfa3 34STATIC void *
cea2e8a9 35S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 36{
37 Newz(m,PL_OpPtr,SLAB_SIZE,char);
38 PL_OpSpace = SLAB_SIZE - sz;
39 return PL_OpPtr += PL_OpSpace;
40}
76e3520e 41
b7dc083c
NIS		 42#else
43#define NewOp(m, var, c, type) Newz(m, var, c, type)
44#endif
e50aee73 45/*
5dc0d613 46 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 47 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 48 */
11343788 49#define CHECKOP(type,o) \
3280af22 50 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 51 ? ( op_free((OP*)o), \
cea2e8a9 52 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 53 Nullop ) \
fc0dc3b3 54 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 55
c53d7c7d
HS		 56#define PAD_MAX 999999999
57
76e3520e 58STATIC char*
cea2e8a9 59S_gv_ename(pTHX_ GV *gv)
4633a7c4 60{
2d8e6c8d 61 STRLEN n_a;
4633a7c4 62 SV* tmpsv = sv_newmortal();
46fc3d4c 63 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 64 return SvPV(tmpsv,n_a);
4633a7c4
LW		 65}
66
76e3520e 67STATIC OP *
cea2e8a9 68S_no_fh_allowed(pTHX_ OP *o)
79072805 69{
cea2e8a9 70 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 71 PL_op_desc[o->op_type]));
11343788 72 return o;
79072805
LW		 73}
74
76e3520e 75STATIC OP *
cea2e8a9 76S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 77{
cea2e8a9 78 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 79 return o;
79072805
LW		 80}
81
76e3520e 82STATIC OP *
cea2e8a9 83S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 84{
cea2e8a9 85 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 86 return o;
79072805
LW		 87}
88
76e3520e 89STATIC void
cea2e8a9 90S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 91{
cea2e8a9 92 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 93 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 94}
95
7a52d87a 96STATIC void
cea2e8a9 97S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 98{
cea2e8a9 99 Perl_warn(aTHX_ "Bareword \"%s\" not allowed while \"strict subs\" in use",
7a52d87a
GS		 100 SvPV_nolen(cSVOPo->op_sv));
101 ++PL_error_count;
102}
103
79072805
LW		 104/* "register" allocation */
105
106PADOFFSET
864dbfa3 107Perl_pad_allocmy(pTHX_ char *name)
93a17b20 108{
11343788 109 dTHR;
a0d0e21e
LW		 110 PADOFFSET off;
111 SV *sv;
112
834a4ddd
LW		 113 if (!(
114 isALPHA(name[1]) ||
115 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
116 name[1] == '_' && (int)strlen(name) > 2))
117 {
c4d0567e 118 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 119 /* 1999-02-27 mjd@plover.com */
120 char *p;
121 p = strchr(name, '\0');
122 /* The next block assumes the buffer is at least 205 chars
123 long. At present, it's always at least 256 chars. */
124 if (p-name > 200) {
125 strcpy(name+200, "...");
126 p = name+199;
127 }
128 else {
129 p[1] = '\0';
130 }
131 /* Move everything else down one character */
132 for (; p-name > 2; p--)
133 *p = *(p-1);
46fc3d4c 134 name[2] = toCTRL(name[1]);
135 name[1] = '^';
136 }
cea2e8a9 137 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 138 }
599cee73 139 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 140 SV **svp = AvARRAY(PL_comppad_name);
141 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 142 if ((sv = svp[off])
3280af22 143 && sv != &PL_sv_undef
c53d7c7d 144 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 145 && strEQ(name, SvPVX(sv)))
146 {
cea2e8a9 147 Perl_warner(aTHX_ WARN_UNSAFE,
9fbbe825 148 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 149 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 150 break;
151 }
152 }
153 }
a0d0e21e
LW		 154 off = pad_alloc(OP_PADSV, SVs_PADMY);
155 sv = NEWSV(1102,0);
93a17b20
LW		 156 sv_upgrade(sv, SVt_PVNV);
157 sv_setpv(sv, name);
3280af22 158 if (PL_in_my_stash) {
c750a3ec 159 if (*name != '$')
cea2e8a9 160 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 161 name));
c750a3ec
MB		 162 SvOBJECT_on(sv);
163 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 164 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
165 PL_sv_objcount++;
c750a3ec 166 }
3280af22 167 av_store(PL_comppad_name, off, sv);
65202027 168 SvNVX(sv) = (NV)PAD_MAX;
8990e307 169 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 170 if (!PL_min_intro_pending)
171 PL_min_intro_pending = off;
172 PL_max_intro_pending = off;
93a17b20 173 if (*name == '@')
3280af22 174 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 175 else if (*name == '%')
3280af22
NIS		 176 av_store(PL_comppad, off, (SV*)newHV());
177 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 178 return off;
179}
180
2680586e
GS		 181#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
182
76e3520e 183STATIC PADOFFSET
cea2e8a9 184S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 185 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 186{
11343788 187 dTHR;
748a9306 188 CV *cv;
93a17b20
LW		 189 I32 off;
190 SV *sv;
93a17b20 191 register I32 i;
c09156bb 192 register PERL_CONTEXT *cx;
93a17b20 193
748a9306 194 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 195 AV *curlist = CvPADLIST(cv);
196 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 197 AV *curname;
4fdae800 198
3280af22 199 if (!svp || *svp == &PL_sv_undef)
4633a7c4 200 continue;
748a9306
LW		 201 curname = (AV*)*svp;
202 svp = AvARRAY(curname);
93965878 203 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 204 if ((sv = svp[off]) &&
3280af22 205 sv != &PL_sv_undef &&
748a9306 206 seq <= SvIVX(sv) &&
13826f2c 207 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 208 strEQ(SvPVX(sv), name))
209 {
5f05dabc 210 I32 depth;
211 AV *oldpad;
212 SV *oldsv;
213
214 depth = CvDEPTH(cv);
215 if (!depth) {
9607fc9c 216 if (newoff) {
217 if (SvFAKE(sv))
218 continue;
4fdae800 219 return 0; /* don't clone from inactive stack frame */
9607fc9c 220 }
5f05dabc 221 depth = 1;
222 }
223 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
224 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 225 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 226 SV *namesv = NEWSV(1103,0);
748a9306 227 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 228 sv_upgrade(namesv, SVt_PVNV);
229 sv_setpv(namesv, name);
3280af22 230 av_store(PL_comppad_name, newoff, namesv);
65202027 231 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
c53d7c7d 232 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 233 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 234 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 235 SvOBJECT_on(namesv);
236 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 237 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 238 PL_sv_objcount++;
239 }
3280af22 240 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 241 /* "It's closures all the way down." */
3280af22 242 CvCLONE_on(PL_compcv);
54310121 243 if (cv == startcv) {
3280af22 244 if (CvANON(PL_compcv))
54310121 245 oldsv = Nullsv; /* no need to keep ref */
246 }
247 else {
28757baa 248 CV *bcv;
249 for (bcv = startcv;
250 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 251 bcv = CvOUTSIDE(bcv))
252 {
28757baa 253 if (CvANON(bcv))
254 CvCLONE_on(bcv);
255 else {
6b35e009
GS		 256 if (ckWARN(WARN_CLOSURE)
257 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
258 {
cea2e8a9 259 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 260 "Variable \"%s\" may be unavailable",
28757baa 261 name);
6b35e009 262 }
28757baa 263 break;
264 }
265 }
266 }
267 }
3280af22 268 else if (!CvUNIQUE(PL_compcv)) {
599cee73 269 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 270 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 271 "Variable \"%s\" will not stay shared", name);
5f05dabc 272 }
748a9306 273 }
3280af22 274 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 275 return newoff;
276 }
93a17b20
LW		 277 }
278 }
279
2680586e
GS		 280 if (flags & FINDLEX_NOSEARCH)
281 return 0;
282
93a17b20
LW		 283 /* Nothing in current lexical context--try eval's context, if any.
284 * This is necessary to let the perldb get at lexically scoped variables.
285 * XXX This will also probably interact badly with eval tree caching.
286 */
287
748a9306 288 for (i = cx_ix; i >= 0; i--) {
93a17b20 289 cx = &cxstack[i];
6b35e009 290 switch (CxTYPE(cx)) {
93a17b20 291 default:
748a9306
LW		 292 if (i == 0 && saweval) {
293 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 294 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 295 }
93a17b20
LW		 296 break;
297 case CXt_EVAL:
44a8e56a 298 switch (cx->blk_eval.old_op_type) {
299 case OP_ENTEREVAL:
6b35e009
GS		 300 if (CxREALEVAL(cx))
301 saweval = i;
44a8e56a 302 break;
303 case OP_REQUIRE:
304 /* require must have its own scope */
305 return 0;
306 }
93a17b20
LW		 307 break;
308 case CXt_SUB:
309 if (!saweval)
310 return 0;
311 cv = cx->blk_sub.cv;
3280af22 312 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 313 saweval = i; /* so we know where we were called from */
93a17b20 314 continue;
93a17b20 315 }
748a9306 316 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 317 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 318 }
319 }
320
748a9306
LW		 321 return 0;
322}
a0d0e21e 323
748a9306 324PADOFFSET
864dbfa3 325Perl_pad_findmy(pTHX_ char *name)
748a9306 326{
11343788 327 dTHR;
748a9306 328 I32 off;
54310121 329 I32 pendoff = 0;
748a9306 330 SV *sv;
3280af22
NIS		 331 SV **svp = AvARRAY(PL_comppad_name);
332 U32 seq = PL_cop_seqmax;
6b35e009 333 PERL_CONTEXT *cx;
33b8ce05 334 CV *outside;
748a9306 335
11343788
MB		 336#ifdef USE_THREADS
337 /*
338 * Special case to get lexical (and hence per-thread) @_.
339 * XXX I need to find out how to tell at parse-time whether use
340 * of @_ should refer to a lexical (from a sub) or defgv (global
341 * scope and maybe weird sub-ish things like formats). See
342 * startsub in perly.y. It's possible that @_ could be lexical
343 * (at least from subs) even in non-threaded perl.
344 */
345 if (strEQ(name, "@_"))
346 return 0; /* success. (NOT_IN_PAD indicates failure) */
347#endif /* USE_THREADS */
348
748a9306 349 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 350 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 351 if ((sv = svp[off]) &&
3280af22 352 sv != &PL_sv_undef &&
54310121 353 (!SvIVX(sv) ||
354 (seq <= SvIVX(sv) &&
355 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 356 strEQ(SvPVX(sv), name))
357 {
54310121 358 if (SvIVX(sv))
359 return (PADOFFSET)off;
360 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 361 }
362 }
748a9306 363
33b8ce05
GS		 364 outside = CvOUTSIDE(PL_compcv);
365
366 /* Check if if we're compiling an eval'', and adjust seq to be the
367 * eval's seq number. This depends on eval'' having a non-null
368 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 369 * identified by CvEVAL being true and CvGV being null. */
370 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 371 cx = &cxstack[cxstack_ix];
372 if (CxREALEVAL(cx))
373 seq = cx->blk_oldcop->cop_seq;
374 }
375
748a9306 376 /* See if it's in a nested scope */
2680586e 377 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 378 if (off) {
379 /* If there is a pending local definition, this new alias must die */
380 if (pendoff)
3280af22 381 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 382 return off; /* pad_findlex returns 0 for failure...*/
54310121 383 }
11343788 384 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 385}
386
387void
864dbfa3 388Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 389{
0453d815 390 dTHR;
93a17b20 391 I32 off;
3280af22 392 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 393 SV *sv;
3280af22
NIS		 394 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
395 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 396 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
397 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 398 }
399 }
400 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 401 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 402 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 403 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 404 }
405}
406
407PADOFFSET
864dbfa3 408Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 409{
11343788 410 dTHR;
79072805
LW		 411 SV *sv;
412 I32 retval;
413
3280af22 414 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 415 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 416 if (PL_pad_reset_pending)
a0d0e21e 417 pad_reset();
ed6116ce 418 if (tmptype & SVs_PADMY) {
79072805 419 do {
3280af22 420 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 421 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 422 retval = AvFILLp(PL_comppad);
79072805
LW		 423 }
424 else {
3280af22
NIS		 425 SV **names = AvARRAY(PL_comppad_name);
426 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 427 for (;;) {
428 /*
429 * "foreach" index vars temporarily become aliases to non-"my"
430 * values. Thus we must skip, not just pad values that are
431 * marked as current pad values, but also those with names.
432 */
3280af22
NIS		 433 if (++PL_padix <= names_fill &&
434 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 435 continue;
3280af22 436 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 437 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
438 break;
439 }
3280af22 440 retval = PL_padix;
79072805 441 }
8990e307 442 SvFLAGS(sv) |= tmptype;
3280af22 443 PL_curpad = AvARRAY(PL_comppad);
11343788 444#ifdef USE_THREADS
5dc0d613 445 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 446 (unsigned long) thr, (unsigned long) PL_curpad,
22c35a8c 447 (long) retval, PL_op_name[optype]));
11343788 448#else
d9bb4600 449 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 450 (unsigned long) PL_curpad,
22c35a8c 451 (long) retval, PL_op_name[optype]));
11343788 452#endif /* USE_THREADS */
79072805
LW		 453 return (PADOFFSET)retval;
454}
455
456SV *
864dbfa3 457Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 458{
11343788
MB		 459 dTHR;
460#ifdef USE_THREADS
5dc0d613 461 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 462 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 463#else
79072805 464 if (!po)
cea2e8a9 465 Perl_croak(aTHX_ "panic: pad_sv po");
d9bb4600 466 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 467 (unsigned long) PL_curpad, po));
11343788 468#endif /* USE_THREADS */
3280af22 469 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 470}
471
472void
864dbfa3 473Perl_pad_free(pTHX_ PADOFFSET po)
79072805 474{
11343788 475 dTHR;
3280af22 476 if (!PL_curpad)
a0d0e21e 477 return;
3280af22 478 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 479 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 480 if (!po)
cea2e8a9 481 Perl_croak(aTHX_ "panic: pad_free po");
11343788 482#ifdef USE_THREADS
5dc0d613 483 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 484 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 485#else
d9bb4600 486 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 487 (unsigned long) PL_curpad, po));
11343788 488#endif /* USE_THREADS */
3280af22
NIS		 489 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
490 SvPADTMP_off(PL_curpad[po]);
491 if ((I32)po < PL_padix)
492 PL_padix = po - 1;
79072805
LW		 493}
494
495void
864dbfa3 496Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 497{
11343788 498 dTHR;
3280af22 499 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 500 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 501 if (!po)
cea2e8a9 502 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 503#ifdef USE_THREADS
5dc0d613 504 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 505 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 506#else
d9bb4600 507 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 508 (unsigned long) PL_curpad, po));
11343788 509#endif /* USE_THREADS */
3280af22
NIS		 510 SvPADTMP_off(PL_curpad[po]);
511 PL_curpad[po] = NEWSV(1107,0);
512 SvPADTMP_on(PL_curpad[po]);
513 if ((I32)po < PL_padix)
514 PL_padix = po - 1;
79072805
LW		 515}
516
d9bb4600
GS		 517/* XXX pad_reset() is currently disabled because it results in serious bugs.
518 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
519 * on the stack by OPs that use them, there are several ways to get an alias
520 * to a shared TARG. Such an alias will change randomly and unpredictably.
521 * We avoid doing this until we can think of a Better Way.
522 * GSAR 97-10-29 */
79072805 523void
864dbfa3 524Perl_pad_reset(pTHX)
79072805 525{
d9bb4600 526#ifdef USE_BROKEN_PAD_RESET
11343788 527 dTHR;
79072805
LW		 528 register I32 po;
529
6b88bc9c 530 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 531 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 532#ifdef USE_THREADS
5dc0d613 533 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 534 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 535#else
d9bb4600 536 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 537 (unsigned long) PL_curpad));
11343788 538#endif /* USE_THREADS */
6b88bc9c
GS		 539 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
540 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
541 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
542 SvPADTMP_off(PL_curpad[po]);
748a9306 543 }
6b88bc9c 544 PL_padix = PL_padix_floor;
79072805 545 }
d9bb4600 546#endif
3280af22 547 PL_pad_reset_pending = FALSE;
79072805
LW		 548}
549
a863c7d1 550#ifdef USE_THREADS
54b9620d 551/* find_threadsv is not reentrant */
a863c7d1 552PADOFFSET
864dbfa3 553Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 554{
555 dTHR;
556 char *p;
557 PADOFFSET key;
554b3eca 558 SV **svp;
54b9620d 559 /* We currently only handle names of a single character */
533c011a 560 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 561 if (!p)
562 return NOT_IN_PAD;
533c011a 563 key = p - PL_threadsv_names;
2d8e6c8d 564 MUTEX_LOCK(&thr->mutex);
54b9620d 565 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 566 if (svp)
567 MUTEX_UNLOCK(&thr->mutex);
568 else {
554b3eca 569 SV *sv = NEWSV(0, 0);
54b9620d 570 av_store(thr->threadsv, key, sv);
940cb80d 571 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 572 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 573 /*
574 * Some magic variables used to be automagically initialised
575 * in gv_fetchpv. Those which are now per-thread magicals get
576 * initialised here instead.
577 */
578 switch (*name) {
54b9620d
MB		 579 case '_':
580 break;
554b3eca
MB		 581 case ';':
582 sv_setpv(sv, "\034");
54b9620d 583 sv_magic(sv, 0, 0, name, 1);
554b3eca 584 break;
c277df42
IZ		 585 case '&':
586 case '`':
587 case '\'':
533c011a 588 PL_sawampersand = TRUE;
a3f914c5
GS		 589 /* FALL THROUGH */
590 case '1':
591 case '2':
592 case '3':
593 case '4':
594 case '5':
595 case '6':
596 case '7':
597 case '8':
598 case '9':
c277df42 599 SvREADONLY_on(sv);
d8b5173a 600 /* FALL THROUGH */
067391ea
GS		 601
602 /* XXX %! tied to Errno.pm needs to be added here.
603 * See gv_fetchpv(). */
604 /* case '!': */
605
54b9620d
MB		 606 default:
607 sv_magic(sv, 0, 0, name, 1);
554b3eca 608 }
8b73bbec 609 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 610 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 611 sv, (*name < 32) ? "^" : "",
612 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 613 }
614 return key;
615}
616#endif /* USE_THREADS */
617
79072805
LW		 618/* Destructor */
619
620void
864dbfa3 621Perl_op_free(pTHX_ OP *o)
79072805 622{
85e6fe83 623 register OP *kid, *nextkid;
acb36ea4 624 OPCODE type;
79072805 625
5dc0d613 626 if (!o || o->op_seq == (U16)-1)
79072805
LW		 627 return;
628
11343788
MB		 629 if (o->op_flags & OPf_KIDS) {
630 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 631 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 632 op_free(kid);
85e6fe83 633 }
79072805 634 }
acb36ea4
GS		 635 type = o->op_type;
636 if (type == OP_NULL)
637 type = o->op_targ;
638
639 /* COP* is not cleared by op_clear() so that we may track line
640 * numbers etc even after null() */
641 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
642 cop_free((COP*)o);
643
644 op_clear(o);
645
646#ifdef PL_OP_SLAB_ALLOC
647 if ((char *) o == PL_OpPtr)
648 {
649 }
650#else
651 Safefree(o);
652#endif
653}
79072805 654
acb36ea4
GS		 655STATIC void
656S_op_clear(pTHX_ OP *o)
657{
11343788 658 switch (o->op_type) {
acb36ea4
GS		 659 case OP_NULL: /* Was holding old type, if any. */
660 case OP_ENTEREVAL: /* Was holding hints. */
661#ifdef USE_THREADS
662 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
663#endif
664 o->op_targ = 0;
a0d0e21e 665 break;
554b3eca 666#ifdef USE_THREADS
8dd3ba40
SM		 667 case OP_ENTERITER:
668 if (!(o->op_flags & OPf_SPECIAL))
669 break;
670 /* FALL THROUGH */
554b3eca 671#endif /* USE_THREADS */
a6006777 672 default:
ac4c12e7 673 if (!(o->op_flags & OPf_REF)
0b94c7bb 674 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 675 break;
676 /* FALL THROUGH */
463ee0b2 677 case OP_GVSV:
79072805 678 case OP_GV:
a6006777 679 case OP_AELEMFAST:
11343788 680 SvREFCNT_dec(cGVOPo->op_gv);
acb36ea4 681 cGVOPo->op_gv = Nullgv;
79072805
LW		 682 break;
683 case OP_CONST:
11343788 684 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 685 cSVOPo->op_sv = Nullsv;
79072805 686 break;
748a9306
LW		 687 case OP_GOTO:
688 case OP_NEXT:
689 case OP_LAST:
690 case OP_REDO:
11343788 691 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 692 break;
693 /* FALL THROUGH */
a0d0e21e 694 case OP_TRANS:
acb36ea4 695 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 696 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 697 cSVOPo->op_sv = Nullsv;
698 }
699 else {
a0ed51b3 700 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 701 cPVOPo->op_pv = Nullch;
702 }
a0d0e21e
LW		 703 break;
704 case OP_SUBST:
11343788 705 op_free(cPMOPo->op_pmreplroot);
acb36ea4 706 cPMOPo->op_pmreplroot = Nullop;
a0d0e21e 707 /* FALL THROUGH */
748a9306 708 case OP_PUSHRE:
a0d0e21e 709 case OP_MATCH:
8782bef2 710 case OP_QR:
c277df42 711 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 712 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 713 break;
79072805
LW		 714 }
715
11343788
MB		 716 if (o->op_targ > 0)
717 pad_free(o->op_targ);
79072805
LW		 718}
719
76e3520e 720STATIC void
3eb57f73
HS		 721S_cop_free(pTHX_ COP* cop)
722{
723 Safefree(cop->cop_label);
724 SvREFCNT_dec(cop->cop_filegv);
0453d815 725 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 726 SvREFCNT_dec(cop->cop_warnings);
727}
728
729STATIC void
cea2e8a9 730S_null(pTHX_ OP *o)
8990e307 731{
acb36ea4
GS		 732 if (o->op_type == OP_NULL)
733 return;
734 op_clear(o);
11343788
MB		 735 o->op_targ = o->op_type;
736 o->op_type = OP_NULL;
22c35a8c 737 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 738}
739
79072805
LW		 740/* Contextualizers */
741
463ee0b2 742#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 743
744OP *
864dbfa3 745Perl_linklist(pTHX_ OP *o)
79072805
LW		 746{
747 register OP *kid;
748
11343788
MB		 749 if (o->op_next)
750 return o->op_next;
79072805
LW		 751
752 /* establish postfix order */
11343788
MB		 753 if (cUNOPo->op_first) {
754 o->op_next = LINKLIST(cUNOPo->op_first);
755 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 756 if (kid->op_sibling)
757 kid->op_next = LINKLIST(kid->op_sibling);
758 else
11343788 759 kid->op_next = o;
79072805
LW		 760 }
761 }
762 else
11343788 763 o->op_next = o;
79072805 764
11343788 765 return o->op_next;
79072805
LW		 766}
767
768OP *
864dbfa3 769Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 770{
771 OP *kid;
11343788
MB		 772 if (o && o->op_flags & OPf_KIDS) {
773 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 774 scalar(kid);
775 }
11343788 776 return o;
79072805
LW		 777}
778
76e3520e 779STATIC OP *
cea2e8a9 780S_scalarboolean(pTHX_ OP *o)
8990e307 781{
d008e5eb 782 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 783 dTHR;
d008e5eb
GS		 784 if (ckWARN(WARN_SYNTAX)) {
785 line_t oldline = PL_curcop->cop_line;
a0d0e21e 786
d008e5eb
GS		 787 if (PL_copline != NOLINE)
788 PL_curcop->cop_line = PL_copline;
cea2e8a9 789 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
d008e5eb
GS		 790 PL_curcop->cop_line = oldline;
791 }
a0d0e21e 792 }
11343788 793 return scalar(o);
8990e307
LW		 794}
795
796OP *
864dbfa3 797Perl_scalar(pTHX_ OP *o)
79072805
LW		 798{
799 OP *kid;
800
a0d0e21e 801 /* assumes no premature commitment */
3280af22 802 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 803 || o->op_type == OP_RETURN)
11343788 804 return o;
79072805 805
b162f9ea
IZ		 806 if ((o->op_private & OPpTARGET_MY)
807 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
808 return scalar(o); /* As if inside SASSIGN */
809
5dc0d613 810 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 811
11343788 812 switch (o->op_type) {
79072805 813 case OP_REPEAT:
11343788
MB		 814 if (o->op_private & OPpREPEAT_DOLIST)
815 null(((LISTOP*)cBINOPo->op_first)->op_first);
816 scalar(cBINOPo->op_first);
8990e307 817 break;
79072805
LW		 818 case OP_OR:
819 case OP_AND:
820 case OP_COND_EXPR:
11343788 821 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 822 scalar(kid);
79072805 823 break;
a0d0e21e 824 case OP_SPLIT:
11343788 825 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 826 if (!kPMOP->op_pmreplroot)
827 deprecate("implicit split to @_");
828 }
829 /* FALL THROUGH */
79072805 830 case OP_MATCH:
8782bef2 831 case OP_QR:
79072805
LW		 832 case OP_SUBST:
833 case OP_NULL:
8990e307 834 default:
11343788
MB		 835 if (o->op_flags & OPf_KIDS) {
836 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 837 scalar(kid);
838 }
79072805
LW		 839 break;
840 case OP_LEAVE:
841 case OP_LEAVETRY:
5dc0d613 842 kid = cLISTOPo->op_first;
54310121 843 scalar(kid);
844 while (kid = kid->op_sibling) {
845 if (kid->op_sibling)
846 scalarvoid(kid);
847 else
848 scalar(kid);
849 }
3280af22 850 WITH_THR(PL_curcop = &PL_compiling);
54310121 851 break;
748a9306 852 case OP_SCOPE:
79072805 853 case OP_LINESEQ:
8990e307 854 case OP_LIST:
11343788 855 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 856 if (kid->op_sibling)
857 scalarvoid(kid);
858 else
859 scalar(kid);
860 }
3280af22 861 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 862 break;
863 }
11343788 864 return o;
79072805
LW		 865}
866
867OP *
864dbfa3 868Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 869{
870 OP *kid;
8990e307
LW		 871 char* useless = 0;
872 SV* sv;
2ebea0a1
GS		 873 U8 want;
874
acb36ea4
GS		 875 if (o->op_type == OP_NEXTSTATE
876 || o->op_type == OP_SETSTATE
877 || o->op_type == OP_DBSTATE
878 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
879 || o->op_targ == OP_SETSTATE
880 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 881 {
882 dTHR;
883 PL_curcop = (COP*)o; /* for warning below */
884 }
79072805 885
54310121 886 /* assumes no premature commitment */
2ebea0a1
GS		 887 want = o->op_flags & OPf_WANT;
888 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 889 || o->op_type == OP_RETURN)
11343788 890 return o;
79072805 891
b162f9ea
IZ		 892 if ((o->op_private & OPpTARGET_MY)
893 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
894 return scalar(o); /* As if inside SASSIGN */
895
5dc0d613 896 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 897
11343788 898 switch (o->op_type) {
79072805 899 default:
22c35a8c 900 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 901 break;
36477c24 902 /* FALL THROUGH */
903 case OP_REPEAT:
11343788 904 if (o->op_flags & OPf_STACKED)
8990e307 905 break;
5d82c453
GA		 906 goto func_ops;
907 case OP_SUBSTR:
908 if (o->op_private == 4)
909 break;
8990e307
LW		 910 /* FALL THROUGH */
911 case OP_GVSV:
912 case OP_WANTARRAY:
913 case OP_GV:
914 case OP_PADSV:
915 case OP_PADAV:
916 case OP_PADHV:
917 case OP_PADANY:
918 case OP_AV2ARYLEN:
8990e307 919 case OP_REF:
a0d0e21e
LW		 920 case OP_REFGEN:
921 case OP_SREFGEN:
8990e307
LW		 922 case OP_DEFINED:
923 case OP_HEX:
924 case OP_OCT:
925 case OP_LENGTH:
8990e307
LW		 926 case OP_VEC:
927 case OP_INDEX:
928 case OP_RINDEX:
929 case OP_SPRINTF:
930 case OP_AELEM:
931 case OP_AELEMFAST:
932 case OP_ASLICE:
8990e307
LW		 933 case OP_HELEM:
934 case OP_HSLICE:
935 case OP_UNPACK:
936 case OP_PACK:
8990e307
LW		 937 case OP_JOIN:
938 case OP_LSLICE:
939 case OP_ANONLIST:
940 case OP_ANONHASH:
941 case OP_SORT:
942 case OP_REVERSE:
943 case OP_RANGE:
944 case OP_FLIP:
945 case OP_FLOP:
946 case OP_CALLER:
947 case OP_FILENO:
948 case OP_EOF:
949 case OP_TELL:
950 case OP_GETSOCKNAME:
951 case OP_GETPEERNAME:
952 case OP_READLINK:
953 case OP_TELLDIR:
954 case OP_GETPPID:
955 case OP_GETPGRP:
956 case OP_GETPRIORITY:
957 case OP_TIME:
958 case OP_TMS:
959 case OP_LOCALTIME:
960 case OP_GMTIME:
961 case OP_GHBYNAME:
962 case OP_GHBYADDR:
963 case OP_GHOSTENT:
964 case OP_GNBYNAME:
965 case OP_GNBYADDR:
966 case OP_GNETENT:
967 case OP_GPBYNAME:
968 case OP_GPBYNUMBER:
969 case OP_GPROTOENT:
970 case OP_GSBYNAME:
971 case OP_GSBYPORT:
972 case OP_GSERVENT:
973 case OP_GPWNAM:
974 case OP_GPWUID:
975 case OP_GGRNAM:
976 case OP_GGRGID:
977 case OP_GETLOGIN:
5d82c453 978 func_ops:
11343788 979 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 980 useless = PL_op_desc[o->op_type];
8990e307
LW		 981 break;
982
983 case OP_RV2GV:
984 case OP_RV2SV:
985 case OP_RV2AV:
986 case OP_RV2HV:
11343788
MB		 987 if (!(o->op_private & OPpLVAL_INTRO) &&
988 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 989 useless = "a variable";
990 break;
79072805
LW		 991
992 case OP_CONST:
11343788 993 sv = cSVOPo->op_sv;
7a52d87a
GS		 994 if (cSVOPo->op_private & OPpCONST_STRICT)
995 no_bareword_allowed(o);
996 else {
d008e5eb
GS		 997 dTHR;
998 if (ckWARN(WARN_VOID)) {
999 useless = "a constant";
1000 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1001 useless = 0;
1002 else if (SvPOK(sv)) {
1003 if (strnEQ(SvPVX(sv), "di", 2) ||
1004 strnEQ(SvPVX(sv), "ds", 2) ||
1005 strnEQ(SvPVX(sv), "ig", 2))
1006 useless = 0;
1007 }
8990e307
LW		 1008 }
1009 }
acb36ea4 1010 null(o); /* don't execute or even remember it */
79072805
LW		 1011 break;
1012
1013 case OP_POSTINC:
11343788 1014 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1015 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1016 break;
1017
1018 case OP_POSTDEC:
11343788 1019 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1020 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1021 break;
1022
79072805
LW		 1023 case OP_OR:
1024 case OP_AND:
1025 case OP_COND_EXPR:
11343788 1026 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1027 scalarvoid(kid);
1028 break;
5aabfad6 1029
a0d0e21e 1030 case OP_NULL:
11343788 1031 if (o->op_flags & OPf_STACKED)
a0d0e21e 1032 break;
5aabfad6 1033 /* FALL THROUGH */
2ebea0a1
GS		 1034 case OP_NEXTSTATE:
1035 case OP_DBSTATE:
79072805
LW		 1036 case OP_ENTERTRY:
1037 case OP_ENTER:
1038 case OP_SCALAR:
11343788 1039 if (!(o->op_flags & OPf_KIDS))
79072805 1040 break;
54310121 1041 /* FALL THROUGH */
463ee0b2 1042 case OP_SCOPE:
79072805
LW		 1043 case OP_LEAVE:
1044 case OP_LEAVETRY:
a0d0e21e 1045 case OP_LEAVELOOP:
79072805 1046 case OP_LINESEQ:
79072805 1047 case OP_LIST:
11343788 1048 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1049 scalarvoid(kid);
1050 break;
c90c0ff4 1051 case OP_ENTEREVAL:
5196be3e 1052 scalarkids(o);
c90c0ff4 1053 break;
5aabfad6 1054 case OP_REQUIRE:
c90c0ff4 1055 /* all requires must return a boolean value */
5196be3e
MB		 1056 o->op_flags &= ~OPf_WANT;
1057 return scalar(o);
a0d0e21e 1058 case OP_SPLIT:
11343788 1059 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1060 if (!kPMOP->op_pmreplroot)
1061 deprecate("implicit split to @_");
1062 }
1063 break;
79072805 1064 }
d008e5eb
GS		 1065 if (useless) {
1066 dTHR;
1067 if (ckWARN(WARN_VOID))
cea2e8a9 1068 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1069 }
11343788 1070 return o;
79072805
LW		 1071}
1072
1073OP *
864dbfa3 1074Perl_listkids(pTHX_ OP *o)
79072805
LW		 1075{
1076 OP *kid;
11343788
MB		 1077 if (o && o->op_flags & OPf_KIDS) {
1078 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1079 list(kid);
1080 }
11343788 1081 return o;
79072805
LW		 1082}
1083
1084OP *
864dbfa3 1085Perl_list(pTHX_ OP *o)
79072805
LW		 1086{
1087 OP *kid;
1088
a0d0e21e 1089 /* assumes no premature commitment */
3280af22 1090 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1091 || o->op_type == OP_RETURN)
11343788 1092 return o;
79072805 1093
b162f9ea
IZ		 1094 if ((o->op_private & OPpTARGET_MY)
1095 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1096 return o; /* As if inside SASSIGN */
1097
5dc0d613 1098 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1099
11343788 1100 switch (o->op_type) {
79072805
LW		 1101 case OP_FLOP:
1102 case OP_REPEAT:
11343788 1103 list(cBINOPo->op_first);
79072805
LW		 1104 break;
1105 case OP_OR:
1106 case OP_AND:
1107 case OP_COND_EXPR:
11343788 1108 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1109 list(kid);
1110 break;
1111 default:
1112 case OP_MATCH:
8782bef2 1113 case OP_QR:
79072805
LW		 1114 case OP_SUBST:
1115 case OP_NULL:
11343788 1116 if (!(o->op_flags & OPf_KIDS))
79072805 1117 break;
11343788
MB		 1118 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1119 list(cBINOPo->op_first);
1120 return gen_constant_list(o);
79072805
LW		 1121 }
1122 case OP_LIST:
11343788 1123 listkids(o);
79072805
LW		 1124 break;
1125 case OP_LEAVE:
1126 case OP_LEAVETRY:
5dc0d613 1127 kid = cLISTOPo->op_first;
54310121 1128 list(kid);
1129 while (kid = kid->op_sibling) {
1130 if (kid->op_sibling)
1131 scalarvoid(kid);
1132 else
1133 list(kid);
1134 }
3280af22 1135 WITH_THR(PL_curcop = &PL_compiling);
54310121 1136 break;
748a9306 1137 case OP_SCOPE:
79072805 1138 case OP_LINESEQ:
11343788 1139 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1140 if (kid->op_sibling)
1141 scalarvoid(kid);
1142 else
1143 list(kid);
1144 }
3280af22 1145 WITH_THR(PL_curcop = &PL_compiling);
79072805 1146 break;
c90c0ff4 1147 case OP_REQUIRE:
1148 /* all requires must return a boolean value */
5196be3e
MB		 1149 o->op_flags &= ~OPf_WANT;
1150 return scalar(o);
79072805 1151 }
11343788 1152 return o;
79072805
LW		 1153}
1154
1155OP *
864dbfa3 1156Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1157{
1158 OP *kid;
1159
11343788
MB		 1160 if (o) {
1161 if (o->op_type == OP_LINESEQ ||
1162 o->op_type == OP_SCOPE ||
1163 o->op_type == OP_LEAVE ||
1164 o->op_type == OP_LEAVETRY)
463ee0b2 1165 {
0f15f207 1166 dTHR;
11343788 1167 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1168 if (kid->op_sibling) {
463ee0b2 1169 scalarvoid(kid);
ed6116ce 1170 }
463ee0b2 1171 }
3280af22 1172 PL_curcop = &PL_compiling;
79072805 1173 }
11343788 1174 o->op_flags &= ~OPf_PARENS;
3280af22 1175 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1176 o->op_flags |= OPf_PARENS;
79072805 1177 }
8990e307 1178 else
11343788
MB		 1179 o = newOP(OP_STUB, 0);
1180 return o;
79072805
LW		 1181}
1182
76e3520e 1183STATIC OP *
cea2e8a9 1184S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1185{
1186 OP *kid;
11343788
MB		 1187 if (o && o->op_flags & OPf_KIDS) {
1188 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1189 mod(kid, type);
79072805 1190 }
11343788 1191 return o;
79072805
LW		 1192}
1193
79072805 1194OP *
864dbfa3 1195Perl_mod(pTHX_ OP *o, I32 type)
79072805 1196{
11343788 1197 dTHR;
79072805
LW		 1198 OP *kid;
1199 SV *sv;
2d8e6c8d 1200 STRLEN n_a;
79072805 1201
3280af22 1202 if (!o || PL_error_count)
11343788 1203 return o;
79072805 1204
b162f9ea
IZ		 1205 if ((o->op_private & OPpTARGET_MY)
1206 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1207 return o;
1208
11343788 1209 switch (o->op_type) {
68dc0745 1210 case OP_UNDEF:
3280af22 1211 PL_modcount++;
5dc0d613 1212 return o;
a0d0e21e 1213 case OP_CONST:
11343788 1214 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1215 goto nomod;
3280af22
NIS		 1216 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1217 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1218 PL_eval_start = 0;
a0d0e21e
LW		 1219 }
1220 else if (!type) {
3280af22
NIS		 1221 SAVEI32(PL_compiling.cop_arybase);
1222 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1223 }
1224 else if (type == OP_REFGEN)
1225 goto nomod;
1226 else
cea2e8a9 1227 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1228 break;
5f05dabc 1229 case OP_STUB:
5196be3e 1230 if (o->op_flags & OPf_PARENS)
5f05dabc 1231 break;
1232 goto nomod;
a0d0e21e
LW		 1233 case OP_ENTERSUB:
1234 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1235 !(o->op_flags & OPf_STACKED)) {
1236 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1237 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1238 assert(cUNOPo->op_first->op_type == OP_NULL);
1239 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1240 break;
1241 }
1242 /* FALL THROUGH */
1243 default:
a0d0e21e
LW		 1244 nomod:
1245 /* grep, foreach, subcalls, refgen */
1246 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1247 break;
cea2e8a9 1248 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1249 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
22c35a8c
GS		 1250 ? "do block" : PL_op_desc[o->op_type]),
1251 type ? PL_op_desc[type] : "local"));
11343788 1252 return o;
79072805 1253
a0d0e21e
LW		 1254 case OP_PREINC:
1255 case OP_PREDEC:
1256 case OP_POW:
1257 case OP_MULTIPLY:
1258 case OP_DIVIDE:
1259 case OP_MODULO:
1260 case OP_REPEAT:
1261 case OP_ADD:
1262 case OP_SUBTRACT:
1263 case OP_CONCAT:
1264 case OP_LEFT_SHIFT:
1265 case OP_RIGHT_SHIFT:
1266 case OP_BIT_AND:
1267 case OP_BIT_XOR:
1268 case OP_BIT_OR:
1269 case OP_I_MULTIPLY:
1270 case OP_I_DIVIDE:
1271 case OP_I_MODULO:
1272 case OP_I_ADD:
1273 case OP_I_SUBTRACT:
11343788 1274 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1275 goto nomod;
3280af22 1276 PL_modcount++;
a0d0e21e
LW		 1277 break;
1278
79072805 1279 case OP_COND_EXPR:
11343788 1280 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1281 mod(kid, type);
79072805
LW		 1282 break;
1283
1284 case OP_RV2AV:
1285 case OP_RV2HV:
93af7a87 1286 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1287 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1288 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1289 PL_modcount = 10000;
11343788 1290 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1291 }
1292 /* FALL THROUGH */
79072805 1293 case OP_RV2GV:
5dc0d613 1294 if (scalar_mod_type(o, type))
3fe9a6f1 1295 goto nomod;
11343788 1296 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1297 /* FALL THROUGH */
1298 case OP_AASSIGN:
1299 case OP_ASLICE:
1300 case OP_HSLICE:
93a17b20
LW		 1301 case OP_NEXTSTATE:
1302 case OP_DBSTATE:
a0d0e21e
LW		 1303 case OP_REFGEN:
1304 case OP_CHOMP:
3280af22 1305 PL_modcount = 10000;
79072805 1306 break;
463ee0b2 1307 case OP_RV2SV:
11343788 1308 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1309 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1310 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1311 /* FALL THROUGH */
79072805 1312 case OP_GV:
463ee0b2 1313 case OP_AV2ARYLEN:
3280af22 1314 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1315 case OP_SASSIGN:
bf4b1e52
GS		 1316 case OP_ANDASSIGN:
1317 case OP_ORASSIGN:
8990e307 1318 case OP_AELEMFAST:
3280af22 1319 PL_modcount++;
8990e307
LW		 1320 break;
1321
748a9306
LW		 1322 case OP_PADAV:
1323 case OP_PADHV:
3280af22 1324 PL_modcount = 10000;
5196be3e
MB		 1325 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1326 return o; /* Treat \(@foo) like ordinary list. */
1327 if (scalar_mod_type(o, type))
3fe9a6f1 1328 goto nomod;
748a9306
LW		 1329 /* FALL THROUGH */
1330 case OP_PADSV:
3280af22 1331 PL_modcount++;
748a9306 1332 if (!type)
cea2e8a9 1333 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1334 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1335 break;
1336
554b3eca 1337#ifdef USE_THREADS
2faa37cc 1338 case OP_THREADSV:
533c011a 1339 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1340 break;
1341#endif /* USE_THREADS */
1342
748a9306
LW		 1343 case OP_PUSHMARK:
1344 break;
a0d0e21e 1345
69969c6f
SB		 1346 case OP_KEYS:
1347 if (type != OP_SASSIGN)
1348 goto nomod;
5d82c453
GA		 1349 goto lvalue_func;
1350 case OP_SUBSTR:
1351 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1352 goto nomod;
5f05dabc 1353 /* FALL THROUGH */
a0d0e21e 1354 case OP_POS:
463ee0b2 1355 case OP_VEC:
5d82c453 1356 lvalue_func:
11343788
MB		 1357 pad_free(o->op_targ);
1358 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1359 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1360 if (o->op_flags & OPf_KIDS)
1361 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1362 break;
a0d0e21e 1363
463ee0b2
LW		 1364 case OP_AELEM:
1365 case OP_HELEM:
11343788 1366 ref(cBINOPo->op_first, o->op_type);
68dc0745 1367 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1368 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1369 o->op_private |= OPpLVAL_DEFER;
3280af22 1370 PL_modcount++;
463ee0b2
LW		 1371 break;
1372
1373 case OP_SCOPE:
1374 case OP_LEAVE:
1375 case OP_ENTER:
11343788
MB		 1376 if (o->op_flags & OPf_KIDS)
1377 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1378 break;
1379
1380 case OP_NULL:
638bc118
GS		 1381 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1382 goto nomod;
1383 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1384 break;
11343788
MB		 1385 if (o->op_targ != OP_LIST) {
1386 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1387 break;
1388 }
1389 /* FALL THROUGH */
463ee0b2 1390 case OP_LIST:
11343788 1391 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1392 mod(kid, type);
1393 break;
1394 }
11343788 1395 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1396
1397 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1398 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1399 else if (!type) {
11343788
MB		 1400 o->op_private |= OPpLVAL_INTRO;
1401 o->op_flags &= ~OPf_SPECIAL;
3280af22 1402 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1403 }
a0d0e21e 1404 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1405 o->op_flags |= OPf_REF;
1406 return o;
463ee0b2
LW		 1407}
1408
864dbfa3 1409STATIC bool
cea2e8a9 1410S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1411{
1412 switch (type) {
1413 case OP_SASSIGN:
5196be3e 1414 if (o->op_type == OP_RV2GV)
3fe9a6f1 1415 return FALSE;
1416 /* FALL THROUGH */
1417 case OP_PREINC:
1418 case OP_PREDEC:
1419 case OP_POSTINC:
1420 case OP_POSTDEC:
1421 case OP_I_PREINC:
1422 case OP_I_PREDEC:
1423 case OP_I_POSTINC:
1424 case OP_I_POSTDEC:
1425 case OP_POW:
1426 case OP_MULTIPLY:
1427 case OP_DIVIDE:
1428 case OP_MODULO:
1429 case OP_REPEAT:
1430 case OP_ADD:
1431 case OP_SUBTRACT:
1432 case OP_I_MULTIPLY:
1433 case OP_I_DIVIDE:
1434 case OP_I_MODULO:
1435 case OP_I_ADD:
1436 case OP_I_SUBTRACT:
1437 case OP_LEFT_SHIFT:
1438 case OP_RIGHT_SHIFT:
1439 case OP_BIT_AND:
1440 case OP_BIT_XOR:
1441 case OP_BIT_OR:
1442 case OP_CONCAT:
1443 case OP_SUBST:
1444 case OP_TRANS:
49e9fbe6
GS		 1445 case OP_READ:
1446 case OP_SYSREAD:
1447 case OP_RECV:
bf4b1e52
GS		 1448 case OP_ANDASSIGN:
1449 case OP_ORASSIGN:
3fe9a6f1 1450 return TRUE;
1451 default:
1452 return FALSE;
1453 }
1454}
1455
35cd451c 1456STATIC bool
cea2e8a9 1457S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1458{
1459 switch (o->op_type) {
1460 case OP_PIPE_OP:
1461 case OP_SOCKPAIR:
1462 if (argnum == 2)
1463 return TRUE;
1464 /* FALL THROUGH */
1465 case OP_SYSOPEN:
1466 case OP_OPEN:
ded8aa31 1467 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1468 case OP_SOCKET:
1469 case OP_OPEN_DIR:
1470 case OP_ACCEPT:
1471 if (argnum == 1)
1472 return TRUE;
1473 /* FALL THROUGH */
1474 default:
1475 return FALSE;
1476 }
1477}
1478
463ee0b2 1479OP *
864dbfa3 1480Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1481{
1482 OP *kid;
11343788
MB		 1483 if (o && o->op_flags & OPf_KIDS) {
1484 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1485 ref(kid, type);
1486 }
11343788 1487 return o;
463ee0b2
LW		 1488}
1489
1490OP *
864dbfa3 1491Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1492{
1493 OP *kid;
463ee0b2 1494
3280af22 1495 if (!o || PL_error_count)
11343788 1496 return o;
463ee0b2 1497
11343788 1498 switch (o->op_type) {
a0d0e21e 1499 case OP_ENTERSUB:
e55aaa0e 1500 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1501 !(o->op_flags & OPf_STACKED)) {
1502 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1503 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1504 assert(cUNOPo->op_first->op_type == OP_NULL);
1505 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1506 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1507 }
1508 break;
aeea060c 1509
463ee0b2 1510 case OP_COND_EXPR:
11343788 1511 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1512 ref(kid, type);
1513 break;
8990e307 1514 case OP_RV2SV:
35cd451c
GS		 1515 if (type == OP_DEFINED)
1516 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1517 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1518 /* FALL THROUGH */
1519 case OP_PADSV:
5f05dabc 1520 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1521 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1522 : type == OP_RV2HV ? OPpDEREF_HV
1523 : OPpDEREF_SV);
11343788 1524 o->op_flags |= OPf_MOD;
a0d0e21e 1525 }
8990e307
LW		 1526 break;
1527
2faa37cc 1528 case OP_THREADSV:
a863c7d1
MB		 1529 o->op_flags |= OPf_MOD; /* XXX ??? */
1530 break;
1531
463ee0b2
LW		 1532 case OP_RV2AV:
1533 case OP_RV2HV:
aeea060c 1534 o->op_flags |= OPf_REF;
8990e307 1535 /* FALL THROUGH */
463ee0b2 1536 case OP_RV2GV:
35cd451c
GS		 1537 if (type == OP_DEFINED)
1538 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1539 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1540 break;
8990e307 1541
463ee0b2
LW		 1542 case OP_PADAV:
1543 case OP_PADHV:
aeea060c 1544 o->op_flags |= OPf_REF;
79072805 1545 break;
aeea060c 1546
8990e307 1547 case OP_SCALAR:
79072805 1548 case OP_NULL:
11343788 1549 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1550 break;
11343788 1551 ref(cBINOPo->op_first, type);
79072805
LW		 1552 break;
1553 case OP_AELEM:
1554 case OP_HELEM:
11343788 1555 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1556 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1557 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1558 : type == OP_RV2HV ? OPpDEREF_HV
1559 : OPpDEREF_SV);
11343788 1560 o->op_flags |= OPf_MOD;
8990e307 1561 }
79072805
LW		 1562 break;
1563
463ee0b2 1564 case OP_SCOPE:
79072805
LW		 1565 case OP_LEAVE:
1566 case OP_ENTER:
8990e307 1567 case OP_LIST:
11343788 1568 if (!(o->op_flags & OPf_KIDS))
79072805 1569 break;
11343788 1570 ref(cLISTOPo->op_last, type);
79072805 1571 break;
a0d0e21e
LW		 1572 default:
1573 break;
79072805 1574 }
11343788 1575 return scalar(o);
8990e307 1576
79072805
LW		 1577}
1578
09bef843
SB		 1579STATIC OP *
1580S_dup_attrlist(pTHX_ OP *o)
1581{
1582 OP *rop = Nullop;
1583
1584 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1585 * where the first kid is OP_PUSHMARK and the remaining ones
1586 * are OP_CONST. We need to push the OP_CONST values.
1587 */
1588 if (o->op_type == OP_CONST)
1589 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1590 else {
1591 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1592 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1593 if (o->op_type == OP_CONST)
1594 rop = append_elem(OP_LIST, rop,
1595 newSVOP(OP_CONST, o->op_flags,
1596 SvREFCNT_inc(cSVOPo->op_sv)));
1597 }
1598 }
1599 return rop;
1600}
1601
1602STATIC void
1603S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1604{
1605 OP *modname; /* for 'use' */
1606 SV *stashsv;
1607
1608 /* fake up C<use attributes $pkg,$rv,@attrs> */
1609 ENTER; /* need to protect against side-effects of 'use' */
1610 SAVEINT(PL_expect);
1611 if (stash && HvNAME(stash))
1612 stashsv = newSVpv(HvNAME(stash), 0);
1613 else
1614 stashsv = &PL_sv_no;
1615#define ATTRSMODULE "attributes"
1616 modname = newSVOP(OP_CONST, 0,
1617 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1618 modname->op_private |= OPpCONST_BARE;
1619 /* that flag is required to make 'use' work right */
1620 utilize(1, start_subparse(FALSE, 0),
1621 Nullop, /* version */
1622 modname,
1623 prepend_elem(OP_LIST,
1624 newSVOP(OP_CONST, 0, stashsv),
1625 prepend_elem(OP_LIST,
1626 newSVOP(OP_CONST, 0, newRV(target)),
1627 dup_attrlist(attrs))));
1628 LEAVE;
1629}
1630
1631STATIC OP *
1632S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1633{
1634 OP *kid;
93a17b20
LW		 1635 I32 type;
1636
3280af22 1637 if (!o || PL_error_count)
11343788 1638 return o;
93a17b20 1639
11343788 1640 type = o->op_type;
93a17b20 1641 if (type == OP_LIST) {
11343788 1642 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1643 my_kid(kid, attrs);
dab48698 1644 } else if (type == OP_UNDEF) {
7766148a 1645 return o;
dab48698 1646 } else if (type != OP_PADSV &&
93a17b20
LW		 1647 type != OP_PADAV &&
1648 type != OP_PADHV &&
1649 type != OP_PUSHMARK)
1650 {
cea2e8a9 1651 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1652 return o;
93a17b20 1653 }
09bef843
SB		 1654 else if (attrs && type != OP_PUSHMARK) {
1655 HV *stash;
1656 SV *padsv;
1657 SV **namesvp;
1658
1659 /* check for C<my Dog $spot> when deciding package */
1660 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1661 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1662 stash = SvSTASH(*namesvp);
1663 else
1664 stash = PL_curstash;
1665 padsv = PAD_SV(o->op_targ);
1666 apply_attrs(stash, padsv, attrs);
1667 }
11343788
MB		 1668 o->op_flags |= OPf_MOD;
1669 o->op_private |= OPpLVAL_INTRO;
1670 return o;
93a17b20
LW		 1671}
1672
1673OP *
09bef843
SB		 1674Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1675{
1676 if (o->op_flags & OPf_PARENS)
1677 list(o);
1678 PL_in_my = FALSE;
1679 PL_in_my_stash = Nullhv;
1680 if (attrs)
1681 SAVEFREEOP(attrs);
1682 return my_kid(o, attrs);
1683}
1684
1685OP *
1686Perl_my(pTHX_ OP *o)
1687{
1688 return my_kid(o, Nullop);
1689}
1690
1691OP *
864dbfa3 1692Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1693{
1694 if (o)
1695 o->op_flags |= OPf_PARENS;
1696 return o;
1697}
1698
1699OP *
864dbfa3 1700Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1701{
d008e5eb 1702 dTHR;
11343788 1703 OP *o;
79072805 1704
599cee73
PM		 1705 if (ckWARN(WARN_UNSAFE) &&
1706 (left->op_type == OP_RV2AV ||
1707 left->op_type == OP_RV2HV ||
1708 left->op_type == OP_PADAV ||
1709 left->op_type == OP_PADHV)) {
22c35a8c 1710 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1711 right->op_type == OP_TRANS)
1712 ? right->op_type : OP_MATCH];
1713 char *sample = ((left->op_type == OP_RV2AV ||
1714 left->op_type == OP_PADAV)
1715 ? "@array" : "%hash");
cea2e8a9 1716 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1717 "Applying %s to %s will act on scalar(%s)",
1718 desc, sample, sample);
2ae324a7 1719 }
1720
79072805
LW		 1721 if (right->op_type == OP_MATCH ||
1722 right->op_type == OP_SUBST ||
1723 right->op_type == OP_TRANS) {
1724 right->op_flags |= OPf_STACKED;
1725 if (right->op_type != OP_MATCH)
463ee0b2 1726 left = mod(left, right->op_type);
79072805 1727 if (right->op_type == OP_TRANS)
11343788 1728 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1729 else
11343788 1730 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1731 if (type == OP_NOT)
11343788
MB		 1732 return newUNOP(OP_NOT, 0, scalar(o));
1733 return o;
79072805
LW		 1734 }
1735 else
1736 return bind_match(type, left,
1737 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1738}
1739
1740OP *
864dbfa3 1741Perl_invert(pTHX_ OP *o)
79072805 1742{
11343788
MB		 1743 if (!o)
1744 return o;
79072805 1745 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1746 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1747}
1748
1749OP *
864dbfa3 1750Perl_scope(pTHX_ OP *o)
79072805
LW		 1751{
1752 if (o) {
3280af22 1753 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1754 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1755 o->op_type = OP_LEAVE;
22c35a8c 1756 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1757 }
1758 else {
1759 if (o->op_type == OP_LINESEQ) {
1760 OP *kid;
1761 o->op_type = OP_SCOPE;
22c35a8c 1762 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
463ee0b2 1763 kid = ((LISTOP*)o)->op_first;
748a9306 1764 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
7399586d
HS		 1765 kid->op_type = OP_SETSTATE;
1766 kid->op_ppaddr = PL_ppaddr[OP_SETSTATE];
748a9306 1767 }
463ee0b2
LW		 1768 }
1769 else
748a9306 1770 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1771 }
79072805
LW		 1772 }
1773 return o;
1774}
1775
b3ac6de7 1776void
864dbfa3 1777Perl_save_hints(pTHX)
b3ac6de7 1778{
3280af22
NIS		 1779 SAVEI32(PL_hints);
1780 SAVESPTR(GvHV(PL_hintgv));
1781 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1782 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1783}
1784
a0d0e21e 1785int
864dbfa3 1786Perl_block_start(pTHX_ int full)
79072805 1787{
11343788 1788 dTHR;
3280af22 1789 int retval = PL_savestack_ix;
b3ac6de7 1790
3280af22 1791 SAVEI32(PL_comppad_name_floor);
55497cff 1792 if (full) {
3280af22
NIS		 1793 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1794 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1795 else
3280af22
NIS		 1796 PL_comppad_name_floor = 0;
1797 }
1798 SAVEI32(PL_min_intro_pending);
1799 SAVEI32(PL_max_intro_pending);
1800 PL_min_intro_pending = 0;
1801 SAVEI32(PL_comppad_name_fill);
1802 SAVEI32(PL_padix_floor);
1803 PL_padix_floor = PL_padix;
1804 PL_pad_reset_pending = FALSE;
b3ac6de7 1805 SAVEHINTS();
3280af22 1806 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1807 SAVEPPTR(PL_compiling.cop_warnings);
0453d815 1808 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 1809 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1810 SAVEFREESV(PL_compiling.cop_warnings) ;
1811 }
1812
1813
a0d0e21e
LW		 1814 return retval;
1815}
1816
1817OP*
864dbfa3 1818Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 1819{
11343788 1820 dTHR;
3280af22 1821 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1822 OP* retval = scalarseq(seq);
a0d0e21e 1823 LEAVE_SCOPE(floor);
3280af22 1824 PL_pad_reset_pending = FALSE;
e24b16f9 1825 PL_compiling.op_private = PL_hints;
a0d0e21e 1826 if (needblockscope)
3280af22
NIS		 1827 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1828 pad_leavemy(PL_comppad_name_fill);
1829 PL_cop_seqmax++;
a0d0e21e
LW		 1830 return retval;
1831}
1832
76e3520e 1833STATIC OP *
cea2e8a9 1834S_newDEFSVOP(pTHX)
54b9620d
MB		 1835{
1836#ifdef USE_THREADS
1837 OP *o = newOP(OP_THREADSV, 0);
1838 o->op_targ = find_threadsv("_");
1839 return o;
1840#else
3280af22 1841 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1842#endif /* USE_THREADS */
1843}
1844
a0d0e21e 1845void
864dbfa3 1846Perl_newPROG(pTHX_ OP *o)
a0d0e21e 1847{
11343788 1848 dTHR;
3280af22 1849 if (PL_in_eval) {
b295d113
TH		 1850 if (PL_eval_root)
1851 return;
faef0170
HS		 1852 PL_eval_root = newUNOP(OP_LEAVEEVAL,
1853 ((PL_in_eval & EVAL_KEEPERR)
1854 ? OPf_SPECIAL : 0), o);
3280af22
NIS		 1855 PL_eval_start = linklist(PL_eval_root);
1856 PL_eval_root->op_next = 0;
1857 peep(PL_eval_start);
a0d0e21e
LW		 1858 }
1859 else {
5dc0d613 1860 if (!o)
a0d0e21e 1861 return;
3280af22
NIS		 1862 PL_main_root = scope(sawparens(scalarvoid(o)));
1863 PL_curcop = &PL_compiling;
1864 PL_main_start = LINKLIST(PL_main_root);
1865 PL_main_root->op_next = 0;
1866 peep(PL_main_start);
1867 PL_compcv = 0;
3841441e 1868
4fdae800 1869 /* Register with debugger */
84902520 1870 if (PERLDB_INTER) {
864dbfa3 1871 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 1872 if (cv) {
1873 dSP;
924508f0 1874 PUSHMARK(SP);
3280af22 1875 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e 1876 PUTBACK;
864dbfa3 1877 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 1878 }
1879 }
79072805 1880 }
79072805
LW		 1881}
1882
1883OP *
864dbfa3 1884Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 1885{
1886 if (o->op_flags & OPf_PARENS)
1887 list(o);
8990e307 1888 else {
d008e5eb 1889 dTHR;
599cee73 1890 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1891 char *s;
834a4ddd 1892 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1893 if (*s == ';' || *s == '=')
cea2e8a9 1894 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 1895 lex ? "my" : "local");
8990e307
LW		 1896 }
1897 }
3280af22
NIS		 1898 PL_in_my = FALSE;
1899 PL_in_my_stash = Nullhv;
93a17b20
LW		 1900 if (lex)
1901 return my(o);
1902 else
463ee0b2 1903 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1904}
1905
1906OP *
864dbfa3 1907Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 1908{
1909 if (o->op_type == OP_LIST) {
554b3eca
MB		 1910 OP *o2;
1911#ifdef USE_THREADS
2faa37cc 1912 o2 = newOP(OP_THREADSV, 0);
54b9620d 1913 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1914#else
1915 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1916#endif /* USE_THREADS */
1917 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1918 }
1919 return o;
1920}
1921
1922OP *
864dbfa3 1923Perl_fold_constants(pTHX_ register OP *o)
79072805 1924{
11343788 1925 dTHR;
79072805
LW		 1926 register OP *curop;
1927 I32 type = o->op_type;
748a9306 1928 SV *sv;
79072805 1929
22c35a8c 1930 if (PL_opargs[type] & OA_RETSCALAR)
79072805 1931 scalar(o);
b162f9ea 1932 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 1933 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1934
eac055e9
GS		 1935 /* integerize op, unless it happens to be C<-foo>.
1936 * XXX should pp_i_negate() do magic string negation instead? */
1937 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
1938 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
1939 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
1940 {
22c35a8c 1941 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 1942 }
85e6fe83 1943
22c35a8c 1944 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 1945 goto nope;
1946
de939608 1947 switch (type) {
7a52d87a
GS		 1948 case OP_NEGATE:
1949 /* XXX might want a ck_negate() for this */
1950 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
1951 break;
de939608
CS		 1952 case OP_SPRINTF:
1953 case OP_UCFIRST:
1954 case OP_LCFIRST:
1955 case OP_UC:
1956 case OP_LC:
69dcf70c
MB		 1957 case OP_SLT:
1958 case OP_SGT:
1959 case OP_SLE:
1960 case OP_SGE:
1961 case OP_SCMP:
1962
de939608
CS		 1963 if (o->op_private & OPpLOCALE)
1964 goto nope;
1965 }
1966
3280af22 1967 if (PL_error_count)
a0d0e21e
LW		 1968 goto nope; /* Don't try to run w/ errors */
1969
79072805 1970 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 1971 if ((curop->op_type != OP_CONST ||
1972 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 1973 curop->op_type != OP_LIST &&
1974 curop->op_type != OP_SCALAR &&
1975 curop->op_type != OP_NULL &&
1976 curop->op_type != OP_PUSHMARK)
1977 {
79072805
LW		 1978 goto nope;
1979 }
1980 }
1981
1982 curop = LINKLIST(o);
1983 o->op_next = 0;
533c011a 1984 PL_op = curop;
cea2e8a9 1985 CALLRUNOPS(aTHX);
3280af22 1986 sv = *(PL_stack_sp--);
748a9306 1987 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1988 pad_swipe(o->op_targ);
748a9306
LW		 1989 else if (SvTEMP(sv)) { /* grab mortal temp? */
1990 (void)SvREFCNT_inc(sv);
1991 SvTEMP_off(sv);
85e6fe83 1992 }
79072805
LW		 1993 op_free(o);
1994 if (type == OP_RV2GV)
b1cb66bf 1995 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1996 else {
ee580363
GS		 1997 /* try to smush double to int, but don't smush -2.0 to -2 */
1998 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1999 type != OP_NEGATE)
2000 {
748a9306 2001 IV iv = SvIV(sv);
65202027 2002 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2003 SvREFCNT_dec(sv);
2004 sv = newSViv(iv);
2005 }
b1cb66bf 2006 else
2007 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2008 }
2009 return newSVOP(OP_CONST, 0, sv);
2010 }
aeea060c 2011
79072805 2012 nope:
22c35a8c 2013 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2014 return o;
79072805 2015
3280af22 2016 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 2017 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 2018 return o;
2019
2020 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2021 if (curop->op_type == OP_CONST) {
b1cb66bf 2022 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2023 continue;
2024 return o;
2025 }
22c35a8c 2026 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2027 continue;
2028 return o;
2029 }
22c35a8c 2030 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2031 }
2032
79072805
LW		 2033 return o;
2034}
2035
2036OP *
864dbfa3 2037Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2038{
11343788 2039 dTHR;
79072805 2040 register OP *curop;
3280af22 2041 I32 oldtmps_floor = PL_tmps_floor;
79072805 2042
a0d0e21e 2043 list(o);
3280af22 2044 if (PL_error_count)
a0d0e21e
LW		 2045 return o; /* Don't attempt to run with errors */
2046
533c011a 2047 PL_op = curop = LINKLIST(o);
a0d0e21e 2048 o->op_next = 0;
cea2e8a9
GS		 2049 pp_pushmark();
2050 CALLRUNOPS(aTHX);
533c011a 2051 PL_op = curop;
cea2e8a9 2052 pp_anonlist();
3280af22 2053 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2054
2055 o->op_type = OP_RV2AV;
22c35a8c 2056 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2057 curop = ((UNOP*)o)->op_first;
3280af22 2058 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2059 op_free(curop);
79072805
LW		 2060 linklist(o);
2061 return list(o);
2062}
2063
2064OP *
864dbfa3 2065Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2066{
2067 OP *kid;
a0d0e21e 2068 OP *last = 0;
79072805 2069
11343788
MB		 2070 if (!o || o->op_type != OP_LIST)
2071 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2072 else
5dc0d613 2073 o->op_flags &= ~OPf_WANT;
79072805 2074
22c35a8c 2075 if (!(PL_opargs[type] & OA_MARK))
11343788 2076 null(cLISTOPo->op_first);
8990e307 2077
11343788 2078 o->op_type = type;
22c35a8c 2079 o->op_ppaddr = PL_ppaddr[type];
11343788 2080 o->op_flags |= flags;
79072805 2081
11343788
MB		 2082 o = CHECKOP(type, o);
2083 if (o->op_type != type)
2084 return o;
79072805 2085
11343788 2086 if (cLISTOPo->op_children < 7) {
79072805 2087 /* XXX do we really need to do this if we're done appending?? */
11343788 2088 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2089 last = kid;
11343788 2090 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2091 }
2092
11343788 2093 return fold_constants(o);
79072805
LW		 2094}
2095
2096/* List constructors */
2097
2098OP *
864dbfa3 2099Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2100{
2101 if (!first)
2102 return last;
8990e307
LW		 2103
2104 if (!last)
79072805 2105 return first;
8990e307 2106
a0d0e21e
LW		 2107 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2108 return newLISTOP(type, 0, first, last);
79072805 2109
a0d0e21e
LW		 2110 if (first->op_flags & OPf_KIDS)
2111 ((LISTOP*)first)->op_last->op_sibling = last;
2112 else {
2113 first->op_flags |= OPf_KIDS;
2114 ((LISTOP*)first)->op_first = last;
2115 }
2116 ((LISTOP*)first)->op_last = last;
2117 ((LISTOP*)first)->op_children++;
2118 return first;
79072805
LW		 2119}
2120
2121OP *
864dbfa3 2122Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2123{
2124 if (!first)
2125 return (OP*)last;
8990e307
LW		 2126
2127 if (!last)
79072805 2128 return (OP*)first;
8990e307
LW		 2129
2130 if (first->op_type != type)
79072805 2131 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2132
2133 if (last->op_type != type)
79072805
LW		 2134 return append_elem(type, (OP*)first, (OP*)last);
2135
2136 first->op_last->op_sibling = last->op_first;
2137 first->op_last = last->op_last;
2138 first->op_children += last->op_children;
2139 if (first->op_children)
acb74605 2140 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2141
2142#ifdef PL_OP_SLAB_ALLOC
2143#else
2144 Safefree(last);
2145#endif
79072805
LW		 2146 return (OP*)first;
2147}
2148
2149OP *
864dbfa3 2150Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2151{
2152 if (!first)
2153 return last;
8990e307
LW		 2154
2155 if (!last)
79072805 2156 return first;
8990e307
LW		 2157
2158 if (last->op_type == type) {
2159 if (type == OP_LIST) { /* already a PUSHMARK there */
2160 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2161 ((LISTOP*)last)->op_first->op_sibling = first;
2162 }
2163 else {
2164 if (!(last->op_flags & OPf_KIDS)) {
2165 ((LISTOP*)last)->op_last = first;
2166 last->op_flags |= OPf_KIDS;
2167 }
2168 first->op_sibling = ((LISTOP*)last)->op_first;
2169 ((LISTOP*)last)->op_first = first;
79072805 2170 }
79072805
LW		 2171 ((LISTOP*)last)->op_children++;
2172 return last;
2173 }
2174
2175 return newLISTOP(type, 0, first, last);
2176}
2177
2178/* Constructors */
2179
2180OP *
864dbfa3 2181Perl_newNULLLIST(pTHX)
79072805 2182{
8990e307
LW		 2183 return newOP(OP_STUB, 0);
2184}
2185
2186OP *
864dbfa3 2187Perl_force_list(pTHX_ OP *o)
8990e307 2188{
11343788
MB		 2189 if (!o || o->op_type != OP_LIST)
2190 o = newLISTOP(OP_LIST, 0, o, Nullop);
2191 null(o);
2192 return o;
79072805
LW		 2193}
2194
2195OP *
864dbfa3 2196Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2197{
2198 LISTOP *listop;
2199
b7dc083c 2200 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2201
2202 listop->op_type = type;
22c35a8c 2203 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2204 listop->op_children = (first != 0) + (last != 0);
2205 listop->op_flags = flags;
79072805
LW		 2206
2207 if (!last && first)
2208 last = first;
2209 else if (!first && last)
2210 first = last;
8990e307
LW		 2211 else if (first)
2212 first->op_sibling = last;
79072805
LW		 2213 listop->op_first = first;
2214 listop->op_last = last;
8990e307
LW		 2215 if (type == OP_LIST) {
2216 OP* pushop;
2217 pushop = newOP(OP_PUSHMARK, 0);
2218 pushop->op_sibling = first;
2219 listop->op_first = pushop;
2220 listop->op_flags |= OPf_KIDS;
2221 if (!last)
2222 listop->op_last = pushop;
2223 }
2224 else if (listop->op_children)
2225 listop->op_flags |= OPf_KIDS;
79072805
LW		 2226
2227 return (OP*)listop;
2228}
2229
2230OP *
864dbfa3 2231Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2232{
11343788 2233 OP *o;
b7dc083c 2234 NewOp(1101, o, 1, OP);
11343788 2235 o->op_type = type;
22c35a8c 2236 o->op_ppaddr = PL_ppaddr[type];
11343788 2237 o->op_flags = flags;
79072805 2238
11343788
MB		 2239 o->op_next = o;
2240 o->op_private = 0 + (flags >> 8);
22c35a8c 2241 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2242 scalar(o);
22c35a8c 2243 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2244 o->op_targ = pad_alloc(type, SVs_PADTMP);
2245 return CHECKOP(type, o);
79072805
LW		 2246}
2247
2248OP *
864dbfa3 2249Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2250{
2251 UNOP *unop;
2252
93a17b20 2253 if (!first)
aeea060c 2254 first = newOP(OP_STUB, 0);
22c35a8c 2255 if (PL_opargs[type] & OA_MARK)
8990e307 2256 first = force_list(first);
93a17b20 2257
b7dc083c 2258 NewOp(1101, unop, 1, UNOP);
79072805 2259 unop->op_type = type;
22c35a8c 2260 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2261 unop->op_first = first;
2262 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2263 unop->op_private = 1 | (flags >> 8);
e50aee73 2264 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2265 if (unop->op_next)
2266 return (OP*)unop;
2267
a0d0e21e 2268 return fold_constants((OP *) unop);
79072805
LW		 2269}
2270
2271OP *
864dbfa3 2272Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2273{
2274 BINOP *binop;
b7dc083c 2275 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2276
2277 if (!first)
2278 first = newOP(OP_NULL, 0);
2279
2280 binop->op_type = type;
22c35a8c 2281 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2282 binop->op_first = first;
2283 binop->op_flags = flags | OPf_KIDS;
2284 if (!last) {
2285 last = first;
c07a80fd 2286 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2287 }
2288 else {
c07a80fd 2289 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2290 first->op_sibling = last;
2291 }
2292
e50aee73 2293 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2294 if (binop->op_next || binop->op_type != type)
79072805
LW		 2295 return (OP*)binop;
2296
7284ab6f 2297 binop->op_last = binop->op_first->op_sibling;
79072805 2298
a0d0e21e 2299 return fold_constants((OP *)binop);
79072805
LW		 2300}
2301
a0ed51b3
LW		 2302static int
2303utf8compare(const void *a, const void *b)
2304{
2305 int i;
2306 for (i = 0; i < 10; i++) {
2307 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2308 return -1;
2309 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2310 return 1;
2311 }
2312 return 0;
2313}
2314
79072805 2315OP *
864dbfa3 2316Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2317{
79072805
LW		 2318 SV *tstr = ((SVOP*)expr)->op_sv;
2319 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2320 STRLEN tlen;
2321 STRLEN rlen;
ec49126f 2322 register U8 *t = (U8*)SvPV(tstr, tlen);
2323 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2324 register I32 i;
2325 register I32 j;
a0ed51b3 2326 I32 del;
79072805 2327 I32 complement;
5d06d08e 2328 I32 squash;
79072805
LW		 2329 register short *tbl;
2330
11343788 2331 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2332 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2333 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2334
a0ed51b3 2335 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2336 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2337 SV* transv = 0;
2338 U8* tend = t + tlen;
2339 U8* rend = r + rlen;
2340 I32 ulen;
2341 U32 tfirst = 1;
2342 U32 tlast = 0;
2343 I32 tdiff;
2344 U32 rfirst = 1;
2345 U32 rlast = 0;
2346 I32 rdiff;
2347 I32 diff;
2348 I32 none = 0;
2349 U32 max = 0;
2350 I32 bits;
2351 I32 grows = 0;
2352 I32 havefinal = 0;
2353 U32 final;
2354 HV *hv;
2355 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2356 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2357
2358 if (complement) {
2359 U8 tmpbuf[10];
2360 U8** cp;
2361 UV nextmin = 0;
2362 New(1109, cp, tlen, U8*);
2363 i = 0;
79cb57f6 2364 transv = newSVpvn("",0);
a0ed51b3
LW		 2365 while (t < tend) {
2366 cp[i++] = t;
2367 t += UTF8SKIP(t);
2368 if (*t == 0xff) {
2369 t++;
2370 t += UTF8SKIP(t);
2371 }
2372 }
2373 qsort(cp, i, sizeof(U8*), utf8compare);
2374 for (j = 0; j < i; j++) {
2375 U8 *s = cp[j];
2376 UV val = utf8_to_uv(s, &ulen);
2377 s += ulen;
2378 diff = val - nextmin;
2379 if (diff > 0) {
2380 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2381 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2382 if (diff > 1) {
2383 t = uv_to_utf8(tmpbuf, val - 1);
2384 sv_catpvn(transv, "\377", 1);
dfe13c55 2385 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2386 }
2387 }
2388 if (*s == 0xff)
2389 val = utf8_to_uv(s+1, &ulen);
2390 if (val >= nextmin)
2391 nextmin = val + 1;
2392 }
2393 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2394 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2395 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2396 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2397 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2398 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2399 tlen = SvCUR(transv);
2400 tend = t + tlen;
2401 }
2402 else if (!rlen && !del) {
2403 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2404 }
2405 if (!squash) {
2406 if (to_utf && from_utf) { /* only counting characters */
2407 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2408 o->op_private |= OPpTRANS_IDENTICAL;
2409 }
2410 else { /* straight latin-1 translation */
2411 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2412 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2413 o->op_private |= OPpTRANS_IDENTICAL;
2414 }
a0ed51b3
LW		 2415 }
2416
2417 while (t < tend || tfirst <= tlast) {
2418 /* see if we need more "t" chars */
2419 if (tfirst > tlast) {
2420 tfirst = (I32)utf8_to_uv(t, &ulen);
2421 t += ulen;
2422 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2423 tlast = (I32)utf8_to_uv(++t, &ulen);
2424 t += ulen;
2425 }
2426 else
2427 tlast = tfirst;
2428 }
2429
2430 /* now see if we need more "r" chars */
2431 if (rfirst > rlast) {
2432 if (r < rend) {
2433 rfirst = (I32)utf8_to_uv(r, &ulen);
2434 r += ulen;
2435 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2436 rlast = (I32)utf8_to_uv(++r, &ulen);
2437 r += ulen;
2438 }
2439 else
2440 rlast = rfirst;
2441 }
2442 else {
2443 if (!havefinal++)
2444 final = rlast;
2445 rfirst = rlast = 0xffffffff;
2446 }
2447 }
2448
2449 /* now see which range will peter our first, if either. */
2450 tdiff = tlast - tfirst;
2451 rdiff = rlast - rfirst;
2452
2453 if (tdiff <= rdiff)
2454 diff = tdiff;
2455 else
2456 diff = rdiff;
2457
2458 if (rfirst == 0xffffffff) {
2459 diff = tdiff; /* oops, pretend rdiff is infinite */
2460 if (diff > 0)
cea2e8a9 2461 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
a0ed51b3 2462 else
cea2e8a9 2463 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\tXXXX\n", tfirst);
a0ed51b3
LW		 2464 }
2465 else {
2466 if (diff > 0)
cea2e8a9 2467 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
a0ed51b3 2468 else
cea2e8a9 2469 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\t%04x\n", tfirst, rfirst);
a0ed51b3
LW		 2470
2471 if (rfirst + diff > max)
2472 max = rfirst + diff;
2473 rfirst += diff + 1;
2474 if (!grows) {
2475 if (rfirst <= 0x80)
2476 ;
2477 else if (rfirst <= 0x800)
2478 grows |= (tfirst < 0x80);
2479 else if (rfirst <= 0x10000)
2480 grows |= (tfirst < 0x800);
2481 else if (rfirst <= 0x200000)
2482 grows |= (tfirst < 0x10000);
2483 else if (rfirst <= 0x4000000)
2484 grows |= (tfirst < 0x200000);
2485 else if (rfirst <= 0x80000000)
2486 grows |= (tfirst < 0x4000000);
2487 }
2488 }
2489 tfirst += diff + 1;
2490 }
2491
2492 none = ++max;
2493 if (del)
2494 del = ++max;
2495
2496 if (max > 0xffff)
2497 bits = 32;
2498 else if (max > 0xff)
2499 bits = 16;
2500 else
2501 bits = 8;
2502
2503 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2504 SvREFCNT_dec(listsv);
2505 if (transv)
2506 SvREFCNT_dec(transv);
2507
2508 if (!del && havefinal)
2509 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2510
2511 if (grows && to_utf)
2512 o->op_private |= OPpTRANS_GROWS;
2513
2514 op_free(expr);
2515 op_free(repl);
2516 return o;
2517 }
2518
2519 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2520 if (complement) {
2521 Zero(tbl, 256, short);
2522 for (i = 0; i < tlen; i++)
ec49126f 2523 tbl[t[i]] = -1;
79072805
LW		 2524 for (i = 0, j = 0; i < 256; i++) {
2525 if (!tbl[i]) {
2526 if (j >= rlen) {
a0ed51b3 2527 if (del)
79072805
LW		 2528 tbl[i] = -2;
2529 else if (rlen)
ec49126f 2530 tbl[i] = r[j-1];
79072805
LW		 2531 else
2532 tbl[i] = i;
2533 }
2534 else
ec49126f 2535 tbl[i] = r[j++];
79072805
LW		 2536 }
2537 }
2538 }
2539 else {
a0ed51b3 2540 if (!rlen && !del) {
79072805 2541 r = t; rlen = tlen;
5d06d08e 2542 if (!squash)
4757a243 2543 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2544 }
2545 for (i = 0; i < 256; i++)
2546 tbl[i] = -1;
2547 for (i = 0, j = 0; i < tlen; i++,j++) {
2548 if (j >= rlen) {
a0ed51b3 2549 if (del) {
ec49126f 2550 if (tbl[t[i]] == -1)
2551 tbl[t[i]] = -2;
79072805
LW		 2552 continue;
2553 }
2554 --j;
2555 }
ec49126f 2556 if (tbl[t[i]] == -1)
2557 tbl[t[i]] = r[j];
79072805
LW		 2558 }
2559 }
2560 op_free(expr);
2561 op_free(repl);
2562
11343788 2563 return o;
79072805
LW		 2564}
2565
2566OP *
864dbfa3 2567Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2568{
11343788 2569 dTHR;
79072805
LW		 2570 PMOP *pmop;
2571
b7dc083c 2572 NewOp(1101, pmop, 1, PMOP);
79072805 2573 pmop->op_type = type;
22c35a8c 2574 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2575 pmop->op_flags = flags;
c07a80fd 2576 pmop->op_private = 0 | (flags >> 8);
79072805 2577
3280af22 2578 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2579 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2580 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2581 pmop->op_pmpermflags |= PMf_LOCALE;
2582 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2583
79072805 2584 /* link into pm list */
3280af22
NIS		 2585 if (type != OP_TRANS && PL_curstash) {
2586 pmop->op_pmnext = HvPMROOT(PL_curstash);
2587 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2588 }
2589
2590 return (OP*)pmop;
2591}
2592
2593OP *
864dbfa3 2594Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2595{
5c0ca799 2596 dTHR;
79072805
LW		 2597 PMOP *pm;
2598 LOGOP *rcop;
ce862d02 2599 I32 repl_has_vars = 0;
79072805 2600
11343788
MB		 2601 if (o->op_type == OP_TRANS)
2602 return pmtrans(o, expr, repl);
79072805 2603
3280af22 2604 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2605 pm = (PMOP*)o;
79072805
LW		 2606
2607 if (expr->op_type == OP_CONST) {
463ee0b2 2608 STRLEN plen;
79072805 2609 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2610 char *p = SvPV(pat, plen);
11343788 2611 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2612 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2613 p = SvPV(pat, plen);
79072805
LW		 2614 pm->op_pmflags |= PMf_SKIPWHITE;
2615 }
cea2e8a9 2616 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2617 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2618 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2619 op_free(expr);
2620 }
2621 else {
3280af22
NIS		 2622 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2623 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2624 ? OP_REGCRESET
2625 : OP_REGCMAYBE),0,expr);
463ee0b2 2626
b7dc083c 2627 NewOp(1101, rcop, 1, LOGOP);
79072805 2628 rcop->op_type = OP_REGCOMP;
22c35a8c 2629 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2630 rcop->op_first = scalar(expr);
3280af22 2631 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2632 ? (OPf_SPECIAL | OPf_KIDS)
2633 : OPf_KIDS);
79072805 2634 rcop->op_private = 1;
11343788 2635 rcop->op_other = o;
79072805
LW		 2636
2637 /* establish postfix order */
3280af22 2638 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2639 LINKLIST(expr);
2640 rcop->op_next = expr;
2641 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2642 }
2643 else {
2644 rcop->op_next = LINKLIST(expr);
2645 expr->op_next = (OP*)rcop;
2646 }
79072805 2647
11343788 2648 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2649 }
2650
2651 if (repl) {
748a9306 2652 OP *curop;
0244c3a4 2653 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2654 curop = 0;
0244c3a4
GS		 2655 if (PL_curcop->cop_line < PL_multi_end)
2656 PL_curcop->cop_line = PL_multi_end;
2657 }
554b3eca 2658#ifdef USE_THREADS
2faa37cc 2659 else if (repl->op_type == OP_THREADSV
554b3eca 2660 && strchr("&`'123456789+",
533c011a 2661 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2662 {
2663 curop = 0;
2664 }
2665#endif /* USE_THREADS */
748a9306
LW		 2666 else if (repl->op_type == OP_CONST)
2667 curop = repl;
79072805 2668 else {
79072805
LW		 2669 OP *lastop = 0;
2670 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2671 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2672#ifdef USE_THREADS
ce862d02
IZ		 2673 if (curop->op_type == OP_THREADSV) {
2674 repl_has_vars = 1;
be949f6f 2675 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2676 break;
554b3eca
MB		 2677 }
2678#else
79072805
LW		 2679 if (curop->op_type == OP_GV) {
2680 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2681 repl_has_vars = 1;
93a17b20 2682 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2683 break;
2684 }
554b3eca 2685#endif /* USE_THREADS */
79072805
LW		 2686 else if (curop->op_type == OP_RV2CV)
2687 break;
2688 else if (curop->op_type == OP_RV2SV ||
2689 curop->op_type == OP_RV2AV ||
2690 curop->op_type == OP_RV2HV ||
2691 curop->op_type == OP_RV2GV) {
2692 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2693 break;
2694 }
748a9306
LW		 2695 else if (curop->op_type == OP_PADSV ||
2696 curop->op_type == OP_PADAV ||
2697 curop->op_type == OP_PADHV ||
554b3eca 2698 curop->op_type == OP_PADANY) {
ce862d02 2699 repl_has_vars = 1;
748a9306 2700 }
1167e5da
SM		 2701 else if (curop->op_type == OP_PUSHRE)
2702 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2703 else
2704 break;
2705 }
2706 lastop = curop;
2707 }
748a9306 2708 }
ce862d02
IZ		 2709 if (curop == repl
2710 && !(repl_has_vars
2711 && (!pm->op_pmregexp
2712 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2713 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2714 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2715 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2716 }
2717 else {
ce862d02
IZ		 2718 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2719 pm->op_pmflags |= PMf_MAYBE_CONST;
2720 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2721 }
b7dc083c 2722 NewOp(1101, rcop, 1, LOGOP);
748a9306 2723 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2724 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2725 rcop->op_first = scalar(repl);
2726 rcop->op_flags |= OPf_KIDS;
2727 rcop->op_private = 1;
11343788 2728 rcop->op_other = o;
748a9306
LW		 2729
2730 /* establish postfix order */
2731 rcop->op_next = LINKLIST(repl);
2732 repl->op_next = (OP*)rcop;
2733
2734 pm->op_pmreplroot = scalar((OP*)rcop);
2735 pm->op_pmreplstart = LINKLIST(rcop);
2736 rcop->op_next = 0;
79072805
LW		 2737 }
2738 }
2739
2740 return (OP*)pm;
2741}
2742
2743OP *
864dbfa3 2744Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2745{
2746 SVOP *svop;
b7dc083c 2747 NewOp(1101, svop, 1, SVOP);
79072805 2748 svop->op_type = type;
22c35a8c 2749 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2750 svop->op_sv = sv;
2751 svop->op_next = (OP*)svop;
2752 svop->op_flags = flags;
22c35a8c 2753 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2754 scalar((OP*)svop);
22c35a8c 2755 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2756 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2757 return CHECKOP(type, svop);
79072805
LW		 2758}
2759
2760OP *
864dbfa3 2761Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 2762{
11343788 2763 dTHR;
79072805 2764 GVOP *gvop;
b7dc083c 2765 NewOp(1101, gvop, 1, GVOP);
79072805 2766 gvop->op_type = type;
22c35a8c 2767 gvop->op_ppaddr = PL_ppaddr[type];
8990e307 2768 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2769 gvop->op_next = (OP*)gvop;
2770 gvop->op_flags = flags;
22c35a8c 2771 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2772 scalar((OP*)gvop);
22c35a8c 2773 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2774 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2775 return CHECKOP(type, gvop);
79072805
LW		 2776}
2777
2778OP *
864dbfa3 2779Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 2780{
2781 PVOP *pvop;
b7dc083c 2782 NewOp(1101, pvop, 1, PVOP);
79072805 2783 pvop->op_type = type;
22c35a8c 2784 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2785 pvop->op_pv = pv;
2786 pvop->op_next = (OP*)pvop;
2787 pvop->op_flags = flags;
22c35a8c 2788 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2789 scalar((OP*)pvop);
22c35a8c 2790 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2791 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2792 return CHECKOP(type, pvop);
79072805
LW		 2793}
2794
79072805 2795void
864dbfa3 2796Perl_package(pTHX_ OP *o)
79072805 2797{
11343788 2798 dTHR;
93a17b20 2799 SV *sv;
79072805 2800
3280af22
NIS		 2801 save_hptr(&PL_curstash);
2802 save_item(PL_curstname);
11343788 2803 if (o) {
463ee0b2
LW		 2804 STRLEN len;
2805 char *name;
11343788 2806 sv = cSVOPo->op_sv;
463ee0b2 2807 name = SvPV(sv, len);
3280af22
NIS		 2808 PL_curstash = gv_stashpvn(name,len,TRUE);
2809 sv_setpvn(PL_curstname, name, len);
11343788 2810 op_free(o);
93a17b20
LW		 2811 }
2812 else {
3280af22
NIS		 2813 sv_setpv(PL_curstname,"<none>");
2814 PL_curstash = Nullhv;
93a17b20 2815 }
7ad382f4 2816 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2817 PL_copline = NOLINE;
2818 PL_expect = XSTATE;
79072805
LW		 2819}
2820
85e6fe83 2821void
864dbfa3 2822Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2823{
a0d0e21e
LW		 2824 OP *pack;
2825 OP *meth;
2826 OP *rqop;
2827 OP *imop;
b1cb66bf 2828 OP *veop;
78ca652e 2829 GV *gv;
85e6fe83 2830
a0d0e21e 2831 if (id->op_type != OP_CONST)
cea2e8a9 2832 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 2833
b1cb66bf 2834 veop = Nullop;
2835
2836 if(version != Nullop) {
2837 SV *vesv = ((SVOP*)version)->op_sv;
2838
2839 if (arg == Nullop && !SvNIOK(vesv)) {
2840 arg = version;
2841 }
2842 else {
2843 OP *pack;
b1cb66bf 2844
2845 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 2846 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 2847
2848 /* Make copy of id so we don't free it twice */
2849 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2850
2851 /* Fake up a method call to VERSION */
b1cb66bf 2852 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2853 append_elem(OP_LIST,
2854 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 2855 newSVOP(OP_METHOD_NAMED, 0,
2856 newSVpvn("VERSION", 7))));
b1cb66bf 2857 }
2858 }
aeea060c 2859
a0d0e21e 2860 /* Fake up an import/unimport */
4633a7c4
LW		 2861 if (arg && arg->op_type == OP_STUB)
2862 imop = arg; /* no import on explicit () */
b1cb66bf 2863 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2864 imop = Nullop; /* use 5.0; */
2865 }
4633a7c4
LW		 2866 else {
2867 /* Make copy of id so we don't free it twice */
2868 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 2869 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2870 append_elem(OP_LIST,
2871 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 2872 newSVOP(OP_METHOD_NAMED, 0,
2873 aver ? newSVpvn("import", 6)
2874 : newSVpvn("unimport", 8))));
4633a7c4
LW		 2875 }
2876
78ca652e
GS		 2877 /* Fake up a require, handle override, if any */
2878 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2879 if (!(gv && GvIMPORTED_CV(gv)))
2880 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2881
2882 if (gv && GvIMPORTED_CV(gv)) {
2883 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2884 append_elem(OP_LIST, id,
2885 scalar(newUNOP(OP_RV2CV, 0,
2886 newGVOP(OP_GV, 0,
2887 gv))))));
2888 }
2889 else {
2890 rqop = newUNOP(OP_REQUIRE, 0, id);
2891 }
a0d0e21e
LW		 2892
2893 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 2894 newATTRSUB(floor,
79cb57f6 2895 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 2896 Nullop,
09bef843 2897 Nullop,
a0d0e21e 2898 append_elem(OP_LINESEQ,
b1cb66bf 2899 append_elem(OP_LINESEQ,
2900 newSTATEOP(0, Nullch, rqop),
2901 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2902 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2903
3280af22
NIS		 2904 PL_copline = NOLINE;
2905 PL_expect = XSTATE;
85e6fe83
LW		 2906}
2907
79072805 2908OP *
864dbfa3 2909Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 2910{
2911 OP *doop;
2912 GV *gv;
2913
2914 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2915 if (!(gv && GvIMPORTED_CV(gv)))
2916 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2917
2918 if (gv && GvIMPORTED_CV(gv)) {
2919 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2920 append_elem(OP_LIST, term,
2921 scalar(newUNOP(OP_RV2CV, 0,
2922 newGVOP(OP_GV, 0,
2923 gv))))));
2924 }
2925 else {
2926 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2927 }
2928 return doop;
2929}
2930
2931OP *
864dbfa3 2932Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 2933{
2934 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2935 list(force_list(subscript)),
2936 list(force_list(listval)) );
79072805
LW		 2937}
2938
76e3520e 2939STATIC I32
cea2e8a9 2940S_list_assignment(pTHX_ register OP *o)
79072805 2941{
11343788 2942 if (!o)
79072805
LW		 2943 return TRUE;
2944
11343788
MB		 2945 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2946 o = cUNOPo->op_first;
79072805 2947
11343788 2948 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 2949 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
2950 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2951
2952 if (t && f)
2953 return TRUE;
2954 if (t || f)
2955 yyerror("Assignment to both a list and a scalar");
2956 return FALSE;
2957 }
2958
11343788
MB		 2959 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2960 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2961 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2962 return TRUE;
2963
11343788 2964 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2965 return TRUE;
2966
11343788 2967 if (o->op_type == OP_RV2SV)
79072805
LW		 2968 return FALSE;
2969
2970 return FALSE;
2971}
2972
2973OP *
864dbfa3 2974Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 2975{
11343788 2976 OP *o;
79072805 2977
a0d0e21e
LW		 2978 if (optype) {
2979 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2980 return newLOGOP(optype, 0,
2981 mod(scalar(left), optype),
2982 newUNOP(OP_SASSIGN, 0, scalar(right)));
2983 }
2984 else {
2985 return newBINOP(optype, OPf_STACKED,
2986 mod(scalar(left), optype), scalar(right));
2987 }
2988 }
2989
79072805 2990 if (list_assignment(left)) {
6ee623d5 2991 dTHR;
3280af22
NIS		 2992 PL_modcount = 0;
2993 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2994 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2995 if (PL_eval_start)
2996 PL_eval_start = 0;
748a9306 2997 else {
a0d0e21e
LW		 2998 op_free(left);
2999 op_free(right);
3000 return Nullop;
3001 }
11343788 3002 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3003 list(force_list(right)),
3004 list(force_list(left)) );
11343788 3005 o->op_private = 0 | (flags >> 8);
a0d0e21e 3006 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3007 OP *curop;
11343788 3008 OP *lastop = o;
3280af22 3009 PL_generation++;
11343788 3010 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3011 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805
LW		 3012 if (curop->op_type == OP_GV) {
3013 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 3014 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3015 break;
3280af22 3016 SvCUR(gv) = PL_generation;
79072805 3017 }
748a9306
LW		 3018 else if (curop->op_type == OP_PADSV ||
3019 curop->op_type == OP_PADAV ||
3020 curop->op_type == OP_PADHV ||
3021 curop->op_type == OP_PADANY) {
3280af22 3022 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3023 SV *sv = svp[curop->op_targ];
3280af22 3024 if (SvCUR(sv) == PL_generation)
748a9306 3025 break;
3280af22 3026 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3027 }
79072805
LW		 3028 else if (curop->op_type == OP_RV2CV)
3029 break;
3030 else if (curop->op_type == OP_RV2SV ||
3031 curop->op_type == OP_RV2AV ||
3032 curop->op_type == OP_RV2HV ||
3033 curop->op_type == OP_RV2GV) {
3034 if (lastop->op_type != OP_GV) /* funny deref? */
3035 break;
3036 }
1167e5da
SM		 3037 else if (curop->op_type == OP_PUSHRE) {
3038 if (((PMOP*)curop)->op_pmreplroot) {
3039 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3040 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3041 break;
3280af22 3042 SvCUR(gv) = PL_generation;
1167e5da
SM		 3043 }
3044 }
79072805
LW		 3045 else
3046 break;
3047 }
3048 lastop = curop;
3049 }
11343788
MB		 3050 if (curop != o)
3051 o->op_private = OPpASSIGN_COMMON;
79072805 3052 }
c07a80fd 3053 if (right && right->op_type == OP_SPLIT) {
3054 OP* tmpop;
3055 if ((tmpop = ((LISTOP*)right)->op_first) &&
3056 tmpop->op_type == OP_PUSHRE)
3057 {
3058 PMOP *pm = (PMOP*)tmpop;
3059 if (left->op_type == OP_RV2AV &&
3060 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3061 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3062 {
3063 tmpop = ((UNOP*)left)->op_first;
3064 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
3065 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
3066 pm->op_pmflags |= PMf_ONCE;
11343788 3067 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3068 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3069 tmpop->op_sibling = Nullop; /* don't free split */
3070 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3071 op_free(o); /* blow off assign */
54310121 3072 right->op_flags &= ~OPf_WANT;
a5f75d66 3073 /* "I don't know and I don't care." */
c07a80fd 3074 return right;
3075 }
3076 }
3077 else {
3280af22 3078 if (PL_modcount < 10000 &&
c07a80fd 3079 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3080 {
3081 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3082 if (SvIVX(sv) == 0)
3280af22 3083 sv_setiv(sv, PL_modcount+1);
c07a80fd 3084 }
3085 }
3086 }
3087 }
11343788 3088 return o;
79072805
LW		 3089 }
3090 if (!right)
3091 right = newOP(OP_UNDEF, 0);
3092 if (right->op_type == OP_READLINE) {
3093 right->op_flags |= OPf_STACKED;
463ee0b2 3094 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3095 }
a0d0e21e 3096 else {
3280af22 3097 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3098 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3099 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3100 if (PL_eval_start)
3101 PL_eval_start = 0;
748a9306 3102 else {
11343788 3103 op_free(o);
a0d0e21e
LW		 3104 return Nullop;
3105 }
3106 }
11343788 3107 return o;
79072805
LW		 3108}
3109
3110OP *
864dbfa3 3111Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3112{
11343788 3113 dTHR;
bbce6d69 3114 U32 seq = intro_my();
79072805
LW		 3115 register COP *cop;
3116
b7dc083c 3117 NewOp(1101, cop, 1, COP);
3280af22 3118 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 3119 cop->op_type = OP_DBSTATE;
22c35a8c 3120 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3121 }
3122 else {
3123 cop->op_type = OP_NEXTSTATE;
22c35a8c 3124 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3125 }
79072805 3126 cop->op_flags = flags;
a0ed51b3 3127 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3128#ifdef NATIVE_HINTS
3129 cop->op_private |= NATIVE_HINTS;
3130#endif
e24b16f9 3131 PL_compiling.op_private = cop->op_private;
79072805
LW		 3132 cop->op_next = (OP*)cop;
3133
463ee0b2
LW		 3134 if (label) {
3135 cop->cop_label = label;
3280af22 3136 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3137 }
bbce6d69 3138 cop->cop_seq = seq;
3280af22 3139 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3140 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3141 cop->cop_warnings = PL_curcop->cop_warnings ;
3142 else
3143 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3144
79072805 3145
3280af22
NIS		 3146 if (PL_copline == NOLINE)
3147 cop->cop_line = PL_curcop->cop_line;
79072805 3148 else {
3280af22
NIS		 3149 cop->cop_line = PL_copline;
3150 PL_copline = NOLINE;
79072805 3151 }
3280af22
NIS		 3152 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
3153 cop->cop_stash = PL_curstash;
79072805 3154
3280af22
NIS		 3155 if (PERLDB_LINE && PL_curstash != PL_debstash) {
3156 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
3157 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3158 (void)SvIOK_on(*svp);
a5f75d66 3159 SvIVX(*svp) = 1;
93a17b20
LW		 3160 SvSTASH(*svp) = (HV*)cop;
3161 }
3162 }
3163
11343788 3164 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3165}
3166
bbce6d69 3167/* "Introduce" my variables to visible status. */
3168U32
864dbfa3 3169Perl_intro_my(pTHX)
bbce6d69 3170{
3171 SV **svp;
3172 SV *sv;
3173 I32 i;
3174
3280af22
NIS		 3175 if (! PL_min_intro_pending)
3176 return PL_cop_seqmax;
bbce6d69 3177
3280af22
NIS		 3178 svp = AvARRAY(PL_comppad_name);
3179 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3180 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3181 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3182 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3183 }
3184 }
3280af22
NIS		 3185 PL_min_intro_pending = 0;
3186 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3187 return PL_cop_seqmax++;
bbce6d69 3188}
3189
79072805 3190OP *
864dbfa3 3191Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3192{
883ffac3
CS		 3193 return new_logop(type, flags, &first, &other);
3194}
3195
3bd495df 3196STATIC OP *
cea2e8a9 3197S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3198{
11343788 3199 dTHR;
79072805 3200 LOGOP *logop;
11343788 3201 OP *o;
883ffac3
CS		 3202 OP *first = *firstp;
3203 OP *other = *otherp;
79072805 3204
a0d0e21e
LW		 3205 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3206 return newBINOP(type, flags, scalar(first), scalar(other));
3207
8990e307 3208 scalarboolean(first);
79072805
LW		 3209 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3210 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3211 if (type == OP_AND || type == OP_OR) {
3212 if (type == OP_AND)
3213 type = OP_OR;
3214 else
3215 type = OP_AND;
11343788 3216 o = first;
883ffac3 3217 first = *firstp = cUNOPo->op_first;
11343788
MB		 3218 if (o->op_next)
3219 first->op_next = o->op_next;
3220 cUNOPo->op_first = Nullop;
3221 op_free(o);
79072805
LW		 3222 }
3223 }
3224 if (first->op_type == OP_CONST) {
599cee73 3225 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3226 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3227 PL_op_desc[type]);
79072805
LW		 3228 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3229 op_free(first);
883ffac3 3230 *firstp = Nullop;
79072805
LW		 3231 return other;
3232 }
3233 else {
3234 op_free(other);
883ffac3 3235 *otherp = Nullop;
79072805
LW		 3236 return first;
3237 }
3238 }
3239 else if (first->op_type == OP_WANTARRAY) {
3240 if (type == OP_AND)
3241 list(other);
3242 else
3243 scalar(other);
3244 }
599cee73 3245 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3246 OP *k1 = ((UNOP*)first)->op_first;
3247 OP *k2 = k1->op_sibling;
3248 OPCODE warnop = 0;
3249 switch (first->op_type)
3250 {
3251 case OP_NULL:
3252 if (k2 && k2->op_type == OP_READLINE
3253 && (k2->op_flags & OPf_STACKED)
55d729e4 3254 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3255 warnop = k2->op_type;
3256 break;
3257
3258 case OP_SASSIGN:
68dc0745 3259 if (k1->op_type == OP_READDIR
3260 || k1->op_type == OP_GLOB
3261 || k1->op_type == OP_EACH)
a6006777 3262 warnop = k1->op_type;
3263 break;
3264 }
8ebc5c01 3265 if (warnop) {
3280af22
NIS		 3266 line_t oldline = PL_curcop->cop_line;
3267 PL_curcop->cop_line = PL_copline;
cea2e8a9 3268 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3269 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3270 PL_op_desc[warnop],
68dc0745 3271 ((warnop == OP_READLINE || warnop == OP_GLOB)
3272 ? " construct" : "() operator"));
3280af22 3273 PL_curcop->cop_line = oldline;
8ebc5c01 3274 }
a6006777 3275 }
79072805
LW		 3276
3277 if (!other)
3278 return first;
3279
a0d0e21e
LW		 3280 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3281 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3282
b7dc083c 3283 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3284
3285 logop->op_type = type;
22c35a8c 3286 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3287 logop->op_first = first;
3288 logop->op_flags = flags | OPf_KIDS;
3289 logop->op_other = LINKLIST(other);
c07a80fd 3290 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3291
3292 /* establish postfix order */
3293 logop->op_next = LINKLIST(first);
3294 first->op_next = (OP*)logop;
3295 first->op_sibling = other;
3296
11343788
MB		 3297 o = newUNOP(OP_NULL, 0, (OP*)logop);
3298 other->op_next = o;
79072805 3299
11343788 3300 return o;
79072805
LW		 3301}
3302
3303OP *
864dbfa3 3304Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3305{
11343788 3306 dTHR;
1a67a97c
SM		 3307 LOGOP *logop;
3308 OP *start;
11343788 3309 OP *o;
79072805 3310
b1cb66bf 3311 if (!falseop)
3312 return newLOGOP(OP_AND, 0, first, trueop);
3313 if (!trueop)
3314 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3315
8990e307 3316 scalarboolean(first);
79072805
LW		 3317 if (first->op_type == OP_CONST) {
3318 if (SvTRUE(((SVOP*)first)->op_sv)) {
3319 op_free(first);
b1cb66bf 3320 op_free(falseop);
3321 return trueop;
79072805
LW		 3322 }
3323 else {
3324 op_free(first);
b1cb66bf 3325 op_free(trueop);
3326 return falseop;
79072805
LW		 3327 }
3328 }
3329 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3330 list(trueop);
3331 scalar(falseop);
79072805 3332 }
1a67a97c
SM		 3333 NewOp(1101, logop, 1, LOGOP);
3334 logop->op_type = OP_COND_EXPR;
3335 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3336 logop->op_first = first;
3337 logop->op_flags = flags | OPf_KIDS;
3338 logop->op_private = 1 | (flags >> 8);
3339 logop->op_other = LINKLIST(trueop);
3340 logop->op_next = LINKLIST(falseop);
79072805 3341
79072805
LW		 3342
3343 /* establish postfix order */
1a67a97c
SM		 3344 start = LINKLIST(first);
3345 first->op_next = (OP*)logop;
79072805 3346
b1cb66bf 3347 first->op_sibling = trueop;
3348 trueop->op_sibling = falseop;
1a67a97c 3349 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3350
1a67a97c 3351 trueop->op_next = falseop->op_next = o;
79072805 3352
1a67a97c 3353 o->op_next = start;
11343788 3354 return o;
79072805
LW		 3355}
3356
3357OP *
864dbfa3 3358Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3359{
b35b2403 3360 dTHR;
1a67a97c 3361 LOGOP *range;
79072805
LW		 3362 OP *flip;
3363 OP *flop;
1a67a97c 3364 OP *leftstart;
11343788 3365 OP *o;
79072805 3366
1a67a97c 3367 NewOp(1101, range, 1, LOGOP);
79072805 3368
1a67a97c
SM		 3369 range->op_type = OP_RANGE;
3370 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3371 range->op_first = left;
3372 range->op_flags = OPf_KIDS;
3373 leftstart = LINKLIST(left);
3374 range->op_other = LINKLIST(right);
3375 range->op_private = 1 | (flags >> 8);
79072805
LW		 3376
3377 left->op_sibling = right;
3378
1a67a97c
SM		 3379 range->op_next = (OP*)range;
3380 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3381 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3382 o = newUNOP(OP_NULL, 0, flop);
79072805 3383 linklist(flop);
1a67a97c 3384 range->op_next = leftstart;
79072805
LW		 3385
3386 left->op_next = flip;
3387 right->op_next = flop;
3388
1a67a97c
SM		 3389 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3390 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3391 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3392 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3393
3394 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3395 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3396
11343788 3397 flip->op_next = o;
79072805 3398 if (!flip->op_private || !flop->op_private)
11343788 3399 linklist(o); /* blow off optimizer unless constant */
79072805 3400
11343788 3401 return o;
79072805
LW		 3402}
3403
3404OP *
864dbfa3 3405Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3406{
11343788 3407 dTHR;
463ee0b2 3408 OP* listop;
11343788 3409 OP* o;
463ee0b2 3410 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3411 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3412
463ee0b2
LW		 3413 if (expr) {
3414 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3415 return block; /* do {} while 0 does once */
fb73857a 3416 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3417 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3418 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3419 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3420 } else if (expr->op_flags & OPf_KIDS) {
3421 OP *k1 = ((UNOP*)expr)->op_first;
3422 OP *k2 = (k1) ? k1->op_sibling : NULL;
3423 switch (expr->op_type) {
3424 case OP_NULL:
3425 if (k2 && k2->op_type == OP_READLINE
3426 && (k2->op_flags & OPf_STACKED)
3427 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3428 expr = newUNOP(OP_DEFINED, 0, expr);
3429 break;
3430
3431 case OP_SASSIGN:
3432 if (k1->op_type == OP_READDIR
3433 || k1->op_type == OP_GLOB
3434 || k1->op_type == OP_EACH)
3435 expr = newUNOP(OP_DEFINED, 0, expr);
3436 break;
3437 }
774d564b 3438 }
463ee0b2 3439 }
93a17b20 3440
8990e307 3441 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3442 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3443
883ffac3
CS		 3444 if (listop)
3445 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3446
11343788
MB		 3447 if (once && o != listop)
3448 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3449
11343788
MB		 3450 if (o == listop)
3451 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3452
11343788
MB		 3453 o->op_flags |= flags;
3454 o = scope(o);
3455 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3456 return o;
79072805
LW		 3457}
3458
3459OP *
864dbfa3 3460Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3461{
11343788 3462 dTHR;
79072805
LW		 3463 OP *redo;
3464 OP *next = 0;
3465 OP *listop;
11343788 3466 OP *o;
79072805
LW		 3467 OP *condop;
3468
fb73857a 3469 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3470 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3471 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3472 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3473 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3474 OP *k1 = ((UNOP*)expr)->op_first;
3475 OP *k2 = (k1) ? k1->op_sibling : NULL;
3476 switch (expr->op_type) {
3477 case OP_NULL:
3478 if (k2 && k2->op_type == OP_READLINE
3479 && (k2->op_flags & OPf_STACKED)
3480 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3481 expr = newUNOP(OP_DEFINED, 0, expr);
3482 break;
3483
3484 case OP_SASSIGN:
3485 if (k1->op_type == OP_READDIR
3486 || k1->op_type == OP_GLOB
3487 || k1->op_type == OP_EACH)
3488 expr = newUNOP(OP_DEFINED, 0, expr);
3489 break;
3490 }
748a9306 3491 }
79072805
LW		 3492
3493 if (!block)
3494 block = newOP(OP_NULL, 0);
3495
3496 if (cont)
3497 next = LINKLIST(cont);
fb73857a 3498 if (expr) {
79072805 3499 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3500 if ((line_t)whileline != NOLINE) {
3280af22 3501 PL_copline = whileline;
fb73857a 3502 cont = append_elem(OP_LINESEQ, cont,
3503 newSTATEOP(0, Nullch, Nullop));
3504 }
3505 }
79072805 3506
463ee0b2 3507 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3508 redo = LINKLIST(listop);
3509
3510 if (expr) {
3280af22 3511 PL_copline = whileline;
883ffac3
CS		 3512 scalar(listop);
3513 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3514 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3515 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3516 op_free((OP*)loop);
883ffac3 3517 return Nullop; /* listop already freed by new_logop */
463ee0b2 3518 }
883ffac3
CS		 3519 if (listop)
3520 ((LISTOP*)listop)->op_last->op_next = condop =
3521 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3522 if (!next)
3523 next = condop;
3524 }
3525 else
11343788 3526 o = listop;
79072805
LW		 3527
3528 if (!loop) {
b7dc083c 3529 NewOp(1101,loop,1,LOOP);
79072805 3530 loop->op_type = OP_ENTERLOOP;
22c35a8c 3531 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3532 loop->op_private = 0;
3533 loop->op_next = (OP*)loop;
3534 }
3535
11343788 3536 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3537
3538 loop->op_redoop = redo;
11343788 3539 loop->op_lastop = o;
79072805
LW		 3540
3541 if (next)
3542 loop->op_nextop = next;
3543 else
11343788 3544 loop->op_nextop = o;
79072805 3545
11343788
MB		 3546 o->op_flags |= flags;
3547 o->op_private |= (flags >> 8);
3548 return o;
79072805
LW		 3549}
3550
3551OP *
864dbfa3 3552Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3553{
3554 LOOP *loop;
b7dc083c 3555 LOOP *tmp;
fb73857a 3556 OP *wop;
85e6fe83 3557 int padoff = 0;
4633a7c4 3558 I32 iterflags = 0;
79072805 3559
79072805 3560 if (sv) {
85e6fe83 3561 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3562 sv->op_type = OP_RV2GV;
22c35a8c 3563 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3564 }
85e6fe83
LW		 3565 else if (sv->op_type == OP_PADSV) { /* private variable */
3566 padoff = sv->op_targ;
3567 op_free(sv);
3568 sv = Nullop;
3569 }
54b9620d
MB		 3570 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3571 padoff = sv->op_targ;
3572 iterflags |= OPf_SPECIAL;
3573 op_free(sv);
3574 sv = Nullop;
3575 }
79072805 3576 else
cea2e8a9 3577 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3578 }
3579 else {
54b9620d
MB		 3580#ifdef USE_THREADS
3581 padoff = find_threadsv("_");
3582 iterflags |= OPf_SPECIAL;
3583#else
3280af22 3584 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3585#endif
79072805 3586 }
5f05dabc 3587 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3588 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3589 iterflags |= OPf_STACKED;
3590 }
89ea2908
GA		 3591 else if (expr->op_type == OP_NULL &&
3592 (expr->op_flags & OPf_KIDS) &&
3593 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3594 {
3595 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3596 * set the STACKED flag to indicate that these values are to be
3597 * treated as min/max values by 'pp_iterinit'.
3598 */
3599 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3600 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3601 OP* left = range->op_first;
3602 OP* right = left->op_sibling;
5152d7c7 3603 LISTOP* listop;
89ea2908
GA		 3604
3605 range->op_flags &= ~OPf_KIDS;
3606 range->op_first = Nullop;
3607
5152d7c7 3608 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3609 listop->op_first->op_next = range->op_next;
3610 left->op_next = range->op_other;
5152d7c7
GS		 3611 right->op_next = (OP*)listop;
3612 listop->op_next = listop->op_first;
89ea2908
GA		 3613
3614 op_free(expr);
5152d7c7 3615 expr = (OP*)(listop);
89ea2908
GA		 3616 null(expr);
3617 iterflags |= OPf_STACKED;
3618 }
3619 else {
3620 expr = mod(force_list(expr), OP_GREPSTART);
3621 }
3622
3623
4633a7c4 3624 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3625 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3626 assert(!loop->op_next);
b7dc083c
NIS		 3627#ifdef PL_OP_SLAB_ALLOC
3628 NewOp(1234,tmp,1,LOOP);
3629 Copy(loop,tmp,1,LOOP);
3630 loop = tmp;
3631#else
85e6fe83 3632 Renew(loop, 1, LOOP);
b7dc083c 3633#endif
85e6fe83 3634 loop->op_targ = padoff;
fb73857a 3635 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3636 PL_copline = forline;
fb73857a 3637 return newSTATEOP(0, label, wop);
79072805
LW		 3638}
3639
8990e307 3640OP*
864dbfa3 3641Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3642{
11343788
MB		 3643 dTHR;
3644 OP *o;
2d8e6c8d
GS		 3645 STRLEN n_a;
3646
8990e307 3647 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3648 /* "last()" means "last" */
3649 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3650 o = newOP(type, OPf_SPECIAL);
3651 else {
3652 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3653 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3654 : ""));
3655 }
8990e307
LW		 3656 op_free(label);
3657 }
3658 else {
a0d0e21e
LW		 3659 if (label->op_type == OP_ENTERSUB)
3660 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3661 o = newUNOP(type, OPf_STACKED, label);
8990e307 3662 }
3280af22 3663 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3664 return o;
8990e307
LW		 3665}
3666
79072805 3667void
864dbfa3 3668Perl_cv_undef(pTHX_ CV *cv)
79072805 3669{
11343788
MB		 3670 dTHR;
3671#ifdef USE_THREADS
e858de61
MB		 3672 if (CvMUTEXP(cv)) {
3673 MUTEX_DESTROY(CvMUTEXP(cv));
3674 Safefree(CvMUTEXP(cv));
3675 CvMUTEXP(cv) = 0;
3676 }
11343788
MB		 3677#endif /* USE_THREADS */
3678
a0d0e21e 3679 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3680#ifdef USE_THREADS
3681 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3682 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3683#else
a0d0e21e 3684 if (CvDEPTH(cv))
cea2e8a9 3685 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3686#endif /* USE_THREADS */
8990e307 3687 ENTER;
a0d0e21e 3688
3280af22
NIS		 3689 SAVESPTR(PL_curpad);
3690 PL_curpad = 0;
a0d0e21e 3691
a5f75d66 3692 if (!CvCLONED(cv))
748a9306 3693 op_free(CvROOT(cv));
79072805 3694 CvROOT(cv) = Nullop;
8990e307 3695 LEAVE;
79072805 3696 }
1d5db326 3697 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3698 CvFLAGS(cv) = 0;
8e07c86e
AD		 3699 SvREFCNT_dec(CvGV(cv));
3700 CvGV(cv) = Nullgv;
3701 SvREFCNT_dec(CvOUTSIDE(cv));
3702 CvOUTSIDE(cv) = Nullcv;
3703 if (CvPADLIST(cv)) {
8ebc5c01 3704 /* may be during global destruction */
3705 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3706 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3707 while (i >= 0) {
3708 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3709 SV* sv = svp ? *svp : Nullsv;
3710 if (!sv)
3711 continue;
3280af22
NIS		 3712 if (sv == (SV*)PL_comppad_name)
3713 PL_comppad_name = Nullav;
3714 else if (sv == (SV*)PL_comppad) {
3715 PL_comppad = Nullav;
3716 PL_curpad = Null(SV**);
46fc3d4c 3717 }
3718 SvREFCNT_dec(sv);
8ebc5c01 3719 }
3720 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3721 }
8e07c86e
AD		 3722 CvPADLIST(cv) = Nullav;
3723 }
79072805
LW		 3724}
3725
5f05dabc 3726#ifdef DEBUG_CLOSURES
76e3520e 3727STATIC void
ba106d47 3728cv_dump(CV *cv)
5f05dabc 3729{
3730 CV *outside = CvOUTSIDE(cv);
3731 AV* padlist = CvPADLIST(cv);
4fdae800 3732 AV* pad_name;
3733 AV* pad;
3734 SV** pname;
3735 SV** ppad;
5f05dabc 3736 I32 ix;
3737
fb73857a 3738 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3739 cv,
3740 (CvANON(cv) ? "ANON"
6b88bc9c 3741 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3742 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3743 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3744 outside,
3745 (!outside ? "null"
3746 : CvANON(outside) ? "ANON"
6b88bc9c 3747 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3748 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3749 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3750
4fdae800 3751 if (!padlist)
3752 return;
3753
3754 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3755 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3756 pname = AvARRAY(pad_name);
3757 ppad = AvARRAY(pad);
3758
93965878 3759 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3760 if (SvPOK(pname[ix]))
fb73857a 3761 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3762 ix, ppad[ix],
3763 SvFAKE(pname[ix]) ? "FAKE " : "",
3764 SvPVX(pname[ix]),
ab50184a
CS		 3765 (long)I_32(SvNVX(pname[ix])),
3766 (long)SvIVX(pname[ix]));
5f05dabc 3767 }
3768}
3769#endif /* DEBUG_CLOSURES */
3770
76e3520e 3771STATIC CV *
cea2e8a9 3772S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 3773{
11343788 3774 dTHR;
748a9306
LW		 3775 AV* av;
3776 I32 ix;
3777 AV* protopadlist = CvPADLIST(proto);
3778 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3779 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3780 SV** pname = AvARRAY(protopad_name);
3781 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3782 I32 fname = AvFILLp(protopad_name);
3783 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3784 AV* comppadlist;
3785 CV* cv;
3786
07055b4c
CS		 3787 assert(!CvUNIQUE(proto));
3788
748a9306 3789 ENTER;
3280af22
NIS		 3790 SAVESPTR(PL_curpad);
3791 SAVESPTR(PL_comppad);
3792 SAVESPTR(PL_comppad_name);
3793 SAVESPTR(PL_compcv);
748a9306 3794
3280af22 3795 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3796 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3797 CvCLONED_on(cv);
5f05dabc 3798 if (CvANON(proto))
3799 CvANON_on(cv);
748a9306 3800
11343788 3801#ifdef USE_THREADS
12ca11f6 3802 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3803 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3804 CvOWNER(cv) = 0;
3805#endif /* USE_THREADS */
748a9306 3806 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3807 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3808 CvSTASH(cv) = CvSTASH(proto);
3809 CvROOT(cv) = CvROOT(proto);
3810 CvSTART(cv) = CvSTART(proto);
5f05dabc 3811 if (outside)
3812 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3813
68dc0745 3814 if (SvPOK(proto))
3815 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3816
3280af22 3817 PL_comppad_name = newAV();
46fc3d4c 3818 for (ix = fname; ix >= 0; ix--)
3280af22 3819 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3820
3280af22 3821 PL_comppad = newAV();
748a9306
LW		 3822
3823 comppadlist = newAV();
3824 AvREAL_off(comppadlist);
3280af22
NIS		 3825 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3826 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3827 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3828 av_fill(PL_comppad, AvFILLp(protopad));
3829 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3830
3831 av = newAV(); /* will be @_ */
3832 av_extend(av, 0);
3280af22 3833 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3834 AvFLAGS(av) = AVf_REIFY;
3835
9607fc9c 3836 for (ix = fpad; ix > 0; ix--) {
3837 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3838 if (namesv && namesv != &PL_sv_undef) {
aa689395 3839 char *name = SvPVX(namesv); /* XXX */
3840 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3841 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 3842 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 3843 if (!off)
3280af22 3844 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3845 else if (off != ix)
cea2e8a9 3846 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 3847 }
3848 else { /* our own lexical */
aa689395 3849 SV* sv;
5f05dabc 3850 if (*name == '&') {
3851 /* anon code -- we'll come back for it */
3852 sv = SvREFCNT_inc(ppad[ix]);
3853 }
3854 else if (*name == '@')
3855 sv = (SV*)newAV();
748a9306 3856 else if (*name == '%')
5f05dabc 3857 sv = (SV*)newHV();
748a9306 3858 else
5f05dabc 3859 sv = NEWSV(0,0);
3860 if (!SvPADBUSY(sv))
3861 SvPADMY_on(sv);
3280af22 3862 PL_curpad[ix] = sv;
748a9306
LW		 3863 }
3864 }
3865 else {
aa689395 3866 SV* sv = NEWSV(0,0);
748a9306 3867 SvPADTMP_on(sv);
3280af22 3868 PL_curpad[ix] = sv;
748a9306
LW		 3869 }
3870 }
3871
5f05dabc 3872 /* Now that vars are all in place, clone nested closures. */
3873
9607fc9c 3874 for (ix = fpad; ix > 0; ix--) {
3875 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3876 if (namesv
3280af22 3877 && namesv != &PL_sv_undef
aa689395 3878 && !(SvFLAGS(namesv) & SVf_FAKE)
3879 && *SvPVX(namesv) == '&'
5f05dabc 3880 && CvCLONE(ppad[ix]))
3881 {
3882 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3883 SvREFCNT_dec(ppad[ix]);
3884 CvCLONE_on(kid);
3885 SvPADMY_on(kid);
3280af22 3886 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3887 }
3888 }
3889
5f05dabc 3890#ifdef DEBUG_CLOSURES
ab50184a
CS		 3891 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3892 cv_dump(outside);
3893 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3894 cv_dump(proto);
ab50184a 3895 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3896 cv_dump(cv);
3897#endif
3898
748a9306
LW		 3899 LEAVE;
3900 return cv;
3901}
3902
3903CV *
864dbfa3 3904Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 3905{
b099ddc0
GS		 3906 CV *cv;
3907 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
3908 cv = cv_clone2(proto, CvOUTSIDE(proto));
3909 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
3910 return cv;
5f05dabc 3911}
3912
3fe9a6f1 3913void
864dbfa3 3914Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 3915{
0453d815
PM		 3916 dTHR;
3917
f248d071 3918 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 3919 SV* msg = sv_newmortal();
3fe9a6f1 3920 SV* name = Nullsv;
3921
3922 if (gv)
46fc3d4c 3923 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3924 sv_setpv(msg, "Prototype mismatch:");
3925 if (name)
cea2e8a9 3926 Perl_sv_catpvf(aTHX_ msg, " sub %_", name);
3fe9a6f1 3927 if (SvPOK(cv))
cea2e8a9 3928 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 3929 sv_catpv(msg, " vs ");
3930 if (p)
cea2e8a9 3931 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 3932 else
3933 sv_catpv(msg, "none");
0453d815 3934 Perl_warner(aTHX_ WARN_UNSAFE, "%_", msg);
3fe9a6f1 3935 }
3936}
3937
760ac839 3938SV *
864dbfa3 3939Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 3940{
54310121 3941 if (!cv || !SvPOK(cv) || SvCUR(cv))
3942 return Nullsv;
fe5e78ed
GS		 3943 return op_const_sv(CvSTART(cv), cv);
3944}
760ac839 3945
fe5e78ed 3946SV *
864dbfa3 3947Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 3948{
3949 SV *sv = Nullsv;
3950
3951 if(!o)
3952 return Nullsv;
3953
3954 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3955 o = cLISTOPo->op_first->op_sibling;
3956
3957 for (; o; o = o->op_next) {
54310121 3958 OPCODE type = o->op_type;
fe5e78ed 3959
acb36ea4 3960 if (sv && o->op_next == o)
fe5e78ed 3961 return sv;
54310121 3962 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3963 continue;
3964 if (type == OP_LEAVESUB || type == OP_RETURN)
3965 break;
3966 if (sv)
3967 return Nullsv;
3968 if (type == OP_CONST)
5dc0d613 3969 sv = cSVOPo->op_sv;
fe5e78ed 3970 else if (type == OP_PADSV && cv) {
e858de61
MB		 3971 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3972 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3973 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3974 return Nullsv;
760ac839 3975 }
54310121 3976 else
3977 return Nullsv;
760ac839 3978 }
5aabfad6 3979 if (sv)
3980 SvREADONLY_on(sv);
760ac839
LW		 3981 return sv;
3982}
3983
09bef843
SB		 3984void
3985Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
3986{
3987 if (o)
3988 SAVEFREEOP(o);
3989 if (proto)
3990 SAVEFREEOP(proto);
3991 if (attrs)
3992 SAVEFREEOP(attrs);
3993 if (block)
3994 SAVEFREEOP(block);
3995 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
3996}
3997
748a9306 3998CV *
864dbfa3 3999Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4000{
09bef843
SB		 4001 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4002}
4003
4004CV *
4005Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4006{
11343788 4007 dTHR;
2d8e6c8d
GS		 4008 STRLEN n_a;
4009 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4 4010 GV *gv = gv_fetchpv(name ? name : "__ANON__",
09bef843
SB		 4011 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4012 SVt_PVCV);
2d8e6c8d 4013 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4014 register CV *cv=0;
a0d0e21e 4015 I32 ix;
79072805 4016
11343788 4017 if (o)
5dc0d613 4018 SAVEFREEOP(o);
3fe9a6f1 4019 if (proto)
4020 SAVEFREEOP(proto);
09bef843
SB		 4021 if (attrs)
4022 SAVEFREEOP(attrs);
3fe9a6f1 4023
09bef843 4024 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4025 maximum a prototype before. */
4026 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4027 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4028 && ckWARN_d(WARN_UNSAFE))
4029 {
0453d815 4030 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4031 }
55d729e4
GS		 4032 cv_ckproto((CV*)gv, NULL, ps);
4033 }
4034 if (ps)
4035 sv_setpv((SV*)gv, ps);
4036 else
4037 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4038 SvREFCNT_dec(PL_compcv);
4039 cv = PL_compcv = NULL;
4040 PL_sub_generation++;
55d729e4
GS		 4041 goto noblock;
4042 }
4043
68dc0745 4044 if (!name || GvCVGEN(gv))
4045 cv = Nullcv;
4046 else if (cv = GvCV(gv)) {
3fe9a6f1 4047 cv_ckproto(cv, gv, ps);
68dc0745 4048 /* already defined (or promised)? */
4049 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4050 SV* const_sv;
fe5e78ed 4051 bool const_changed = TRUE;
09bef843 4052 if (!block && !attrs) {
aa689395 4053 /* just a "sub foo;" when &foo is already defined */
3280af22 4054 SAVEFREESV(PL_compcv);
aa689395 4055 goto done;
4056 }
7bac28a0 4057 /* ahem, death to those who redefine active sort subs */
3280af22 4058 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4059 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4060 if (!block)
4061 goto withattrs;
fe5e78ed
GS		 4062 if(const_sv = cv_const_sv(cv))
4063 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4064 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4065 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4066 && HvNAME(GvSTASH(CvGV(cv)))
4067 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
4068 "autouse"))) {
3280af22
NIS		 4069 line_t oldline = PL_curcop->cop_line;
4070 PL_curcop->cop_line = PL_copline;
cea2e8a9 4071 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4072 const_sv ? "Constant subroutine %s redefined"
09bef843 4073 : "Subroutine %s redefined", name);
3280af22 4074 PL_curcop->cop_line = oldline;
79072805 4075 }
8990e307 4076 SvREFCNT_dec(cv);
68dc0745 4077 cv = Nullcv;
79072805
LW		 4078 }
4079 }
09bef843
SB		 4080 withattrs:
4081 if (attrs) {
4082 HV *stash;
4083 SV *rcv;
4084
4085 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4086 * before we clobber PL_compcv.
4087 */
4088 if (cv && !block) {
4089 rcv = (SV*)cv;
4090 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4091 stash = GvSTASH(CvGV(cv));
4092 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4093 stash = CvSTASH(cv);
4094 else
4095 stash = PL_curstash;
4096 }
4097 else {
4098 /* possibly about to re-define existing subr -- ignore old cv */
4099 rcv = (SV*)PL_compcv;
4100 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4101 stash = GvSTASH(gv);
4102 else
4103 stash = PL_curstash;
4104 }
4105 apply_attrs(stash, rcv, attrs);
4106 }
a0d0e21e 4107 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4108 if (!block) {
4109 /* got here with just attrs -- work done, so bug out */
4110 SAVEFREESV(PL_compcv);
4111 goto done;
4112 }
4633a7c4 4113 cv_undef(cv);
3280af22
NIS		 4114 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4115 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4116 CvOUTSIDE(PL_compcv) = 0;
4117 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4118 CvPADLIST(PL_compcv) = 0;
4119 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4120 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4121 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4122 }
4123 else {
3280af22 4124 cv = PL_compcv;
44a8e56a 4125 if (name) {
4126 GvCV(gv) = cv;
4127 GvCVGEN(gv) = 0;
3280af22 4128 PL_sub_generation++;
44a8e56a 4129 }
a0d0e21e 4130 }
44a8e56a 4131 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 4132 CvFILEGV(cv) = PL_curcop->cop_filegv;
4133 CvSTASH(cv) = PL_curstash;
11343788
MB		 4134#ifdef USE_THREADS
4135 CvOWNER(cv) = 0;
1cfa4ec7 4136 if (!CvMUTEXP(cv)) {
f6aaf501 4137 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4138 MUTEX_INIT(CvMUTEXP(cv));
4139 }
11343788 4140#endif /* USE_THREADS */
8990e307 4141
3fe9a6f1 4142 if (ps)
4143 sv_setpv((SV*)cv, ps);
4633a7c4 4144
3280af22 4145 if (PL_error_count) {
c07a80fd 4146 op_free(block);
4147 block = Nullop;
68dc0745 4148 if (name) {
4149 char *s = strrchr(name, ':');
4150 s = s ? s+1 : name;
6d4c2119
CS		 4151 if (strEQ(s, "BEGIN")) {
4152 char *not_safe =
4153 "BEGIN not safe after errors--compilation aborted";
faef0170 4154 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4155 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4156 else {
4157 /* force display of errors found but not reported */
38a03e6e 4158 sv_catpv(ERRSV, not_safe);
cea2e8a9 4159 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4160 }
4161 }
68dc0745 4162 }
c07a80fd 4163 }
a0d0e21e 4164 if (!block) {
55d729e4 4165 noblock:
3280af22 4166 PL_copline = NOLINE;
a0d0e21e
LW		 4167 LEAVE_SCOPE(floor);
4168 return cv;
4169 }
4170
3280af22
NIS		 4171 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4172 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4173
54310121 4174 if (CvCLONE(cv)) {
3280af22
NIS		 4175 SV **namep = AvARRAY(PL_comppad_name);
4176 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4177 SV *namesv;
4178
3280af22 4179 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4180 continue;
4181 /*
4182 * The only things that a clonable function needs in its
4183 * pad are references to outer lexicals and anonymous subs.
4184 * The rest are created anew during cloning.
4185 */
4186 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4187 namesv != &PL_sv_undef &&
54310121 4188 (SvFAKE(namesv) ||
4189 *SvPVX(namesv) == '&')))
4190 {
3280af22
NIS		 4191 SvREFCNT_dec(PL_curpad[ix]);
4192 PL_curpad[ix] = Nullsv;
54310121 4193 }
4194 }
a0d0e21e 4195 }
54310121 4196 else {
4197 AV *av = newAV(); /* Will be @_ */
4198 av_extend(av, 0);
3280af22 4199 av_store(PL_comppad, 0, (SV*)av);
54310121 4200 AvFLAGS(av) = AVf_REIFY;
79072805 4201
3280af22
NIS		 4202 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4203 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4204 continue;
3280af22
NIS		 4205 if (!SvPADMY(PL_curpad[ix]))
4206 SvPADTMP_on(PL_curpad[ix]);
54310121 4207 }
4208 }
79072805 4209
a0d0e21e 4210 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 4211 CvSTART(cv) = LINKLIST(CvROOT(cv));
4212 CvROOT(cv)->op_next = 0;
4213 peep(CvSTART(cv));
93a17b20 4214
44a8e56a 4215 if (name) {
4216 char *s;
4217
3280af22 4218 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4219 SV *sv = NEWSV(0,0);
44a8e56a 4220 SV *tmpstr = sv_newmortal();
549bb64a 4221 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4222 CV *cv;
4223 HV *hv;
4224
cea2e8a9 4225 Perl_sv_setpvf(aTHX_ sv, "%_:%ld-%ld",
3280af22
NIS		 4226 GvSV(PL_curcop->cop_filegv),
4227 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 4228 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4229 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4230 hv = GvHVn(db_postponed);
9607fc9c 4231 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4232 && (cv = GvCV(db_postponed))) {
44a8e56a 4233 dSP;
924508f0 4234 PUSHMARK(SP);
44a8e56a 4235 XPUSHs(tmpstr);
4236 PUTBACK;
864dbfa3 4237 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4238 }
4239 }
79072805 4240
44a8e56a 4241 if ((s = strrchr(name,':')))
28757baa 4242 s++;
4243 else
4244 s = name;
68dc0745 4245 if (strEQ(s, "BEGIN")) {
3280af22 4246 I32 oldscope = PL_scopestack_ix;
28757baa 4247 ENTER;
3280af22
NIS		 4248 SAVESPTR(PL_compiling.cop_filegv);
4249 SAVEI16(PL_compiling.cop_line);
4250 save_svref(&PL_rs);
4251 sv_setsv(PL_rs, PL_nrs);
28757baa 4252
3280af22
NIS		 4253 if (!PL_beginav)
4254 PL_beginav = newAV();
28757baa 4255 DEBUG_x( dump_sub(gv) );
3280af22 4256 av_push(PL_beginav, (SV *)cv);
28757baa 4257 GvCV(gv) = 0;
3280af22 4258 call_list(oldscope, PL_beginav);
a6006777 4259
3280af22 4260 PL_curcop = &PL_compiling;
a0ed51b3 4261 PL_compiling.op_private = PL_hints;
28757baa 4262 LEAVE;
4263 }
3280af22
NIS		 4264 else if (strEQ(s, "END") && !PL_error_count) {
4265 if (!PL_endav)
4266 PL_endav = newAV();
4267 av_unshift(PL_endav, 1);
4268 av_store(PL_endav, 0, (SV *)cv);
28757baa 4269 GvCV(gv) = 0;
4270 }
3280af22
NIS		 4271 else if (strEQ(s, "INIT") && !PL_error_count) {
4272 if (!PL_initav)
4273 PL_initav = newAV();
4274 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4275 GvCV(gv) = 0;
ae77835f 4276 }
79072805 4277 }
a6006777 4278
aa689395 4279 done:
3280af22 4280 PL_copline = NOLINE;
8990e307 4281 LEAVE_SCOPE(floor);
a0d0e21e 4282 return cv;
79072805
LW		 4283}
4284
b099ddc0 4285/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4286void
864dbfa3 4287Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4288{
4289 dTHR;
3280af22
NIS		 4290 U32 oldhints = PL_hints;
4291 HV *old_cop_stash = PL_curcop->cop_stash;
4292 HV *old_curstash = PL_curstash;
4293 line_t oldline = PL_curcop->cop_line;
4294 PL_curcop->cop_line = PL_copline;
5476c433 4295
3280af22 4296 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4297 if(stash)
3280af22 4298 PL_curstash = PL_curcop->cop_stash = stash;
5476c433 4299
09bef843 4300 newATTRSUB(
be24f278 4301 start_subparse(FALSE, 0),
5476c433 4302 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4303 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4304 Nullop,
5476c433
JD		 4305 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4306 );
4307
3280af22
NIS		 4308 PL_hints = oldhints;
4309 PL_curcop->cop_stash = old_cop_stash;
4310 PL_curstash = old_curstash;
4311 PL_curcop->cop_line = oldline;
5476c433
JD		 4312}
4313
57d3b86d 4314CV *
864dbfa3 4315Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4316{
11343788 4317 dTHR;
44a8e56a 4318 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4319 register CV *cv;
44a8e56a 4320
4321 if (cv = (name ? GvCV(gv) : Nullcv)) {
4322 if (GvCVGEN(gv)) {
4323 /* just a cached method */
4324 SvREFCNT_dec(cv);
4325 cv = 0;
4326 }
4327 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4328 /* already defined (or promised) */
599cee73 4329 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4330 && HvNAME(GvSTASH(CvGV(cv)))
4331 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4332 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4333 if (PL_copline != NOLINE)
4334 PL_curcop->cop_line = PL_copline;
cea2e8a9 4335 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4336 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4337 }
4338 SvREFCNT_dec(cv);
4339 cv = 0;
79072805 4340 }
79072805 4341 }
44a8e56a 4342
4343 if (cv) /* must reuse cv if autoloaded */
4344 cv_undef(cv);
a0d0e21e
LW		 4345 else {
4346 cv = (CV*)NEWSV(1105,0);
4347 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4348 if (name) {
4349 GvCV(gv) = cv;
4350 GvCVGEN(gv) = 0;
3280af22 4351 PL_sub_generation++;
44a8e56a 4352 }
a0d0e21e 4353 }
5196be3e 4354 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4355#ifdef USE_THREADS
12ca11f6 4356 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4357 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4358 CvOWNER(cv) = 0;
4359#endif /* USE_THREADS */
79072805 4360 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4361 CvXSUB(cv) = subaddr;
44a8e56a 4362
28757baa 4363 if (name) {
4364 char *s = strrchr(name,':');
4365 if (s)
4366 s++;
4367 else
4368 s = name;
4369 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4370 if (!PL_beginav)
4371 PL_beginav = newAV();
4372 av_push(PL_beginav, (SV *)cv);
44a8e56a 4373 GvCV(gv) = 0;
28757baa 4374 }
4375 else if (strEQ(s, "END")) {
3280af22
NIS		 4376 if (!PL_endav)
4377 PL_endav = newAV();
4378 av_unshift(PL_endav, 1);
4379 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4380 GvCV(gv) = 0;
28757baa 4381 }
7d07dbc2 4382 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4383 if (!PL_initav)
4384 PL_initav = newAV();
4385 av_push(PL_initav, (SV *)cv);
f8f842e4 4386 GvCV(gv) = 0;
ae77835f 4387 }
28757baa 4388 }
8990e307 4389 else
a5f75d66 4390 CvANON_on(cv);
44a8e56a 4391
a0d0e21e 4392 return cv;
79072805
LW		 4393}
4394
4395void
864dbfa3 4396Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4397{
11343788 4398 dTHR;
79072805
LW		 4399 register CV *cv;
4400 char *name;
4401 GV *gv;
a0d0e21e 4402 I32 ix;
2d8e6c8d 4403 STRLEN n_a;
79072805 4404
11343788 4405 if (o)
2d8e6c8d 4406 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4407 else
4408 name = "STDOUT";
85e6fe83 4409 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4410 GvMULTI_on(gv);
79072805 4411 if (cv = GvFORM(gv)) {
599cee73 4412 if (ckWARN(WARN_REDEFINE)) {
3280af22 4413 line_t oldline = PL_curcop->cop_line;
79072805 4414
3280af22 4415 PL_curcop->cop_line = PL_copline;
cea2e8a9 4416 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
3280af22 4417 PL_curcop->cop_line = oldline;
79072805 4418 }
8990e307 4419 SvREFCNT_dec(cv);
79072805 4420 }
3280af22 4421 cv = PL_compcv;
79072805 4422 GvFORM(gv) = cv;
44a8e56a 4423 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4424 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4425
3280af22
NIS		 4426 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4427 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4428 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4429 }
4430
79072805
LW		 4431 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4432 CvSTART(cv) = LINKLIST(CvROOT(cv));
4433 CvROOT(cv)->op_next = 0;
4434 peep(CvSTART(cv));
11343788 4435 op_free(o);
3280af22 4436 PL_copline = NOLINE;
8990e307 4437 LEAVE_SCOPE(floor);
79072805
LW		 4438}
4439
4440OP *
864dbfa3 4441Perl_newANONLIST(pTHX_ OP *o)
79072805 4442{
93a17b20 4443 return newUNOP(OP_REFGEN, 0,
11343788 4444 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4445}
4446
4447OP *
864dbfa3 4448Perl_newANONHASH(pTHX_ OP *o)
79072805 4449{
93a17b20 4450 return newUNOP(OP_REFGEN, 0,
11343788 4451 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4452}
4453
4454OP *
864dbfa3 4455Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4456{
09bef843
SB		 4457 return newANONATTRSUB(floor, proto, Nullop, block);
4458}
4459
4460OP *
4461Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4462{
a0d0e21e 4463 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4464 newSVOP(OP_ANONCODE, 0,
4465 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4466}
4467
4468OP *
864dbfa3 4469Perl_oopsAV(pTHX_ OP *o)
79072805 4470{
ed6116ce
LW		 4471 switch (o->op_type) {
4472 case OP_PADSV:
4473 o->op_type = OP_PADAV;
22c35a8c 4474 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4475 return ref(o, OP_RV2AV);
ed6116ce
LW		 4476
4477 case OP_RV2SV:
79072805 4478 o->op_type = OP_RV2AV;
22c35a8c 4479 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4480 ref(o, OP_RV2AV);
ed6116ce
LW		 4481 break;
4482
4483 default:
0453d815
PM		 4484 if (ckWARN_d(WARN_INTERNAL))
4485 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4486 break;
4487 }
79072805
LW		 4488 return o;
4489}
4490
4491OP *
864dbfa3 4492Perl_oopsHV(pTHX_ OP *o)
79072805 4493{
0453d815 4494 dTHR;
0453d815 4495
ed6116ce
LW		 4496 switch (o->op_type) {
4497 case OP_PADSV:
4498 case OP_PADAV:
4499 o->op_type = OP_PADHV;
22c35a8c 4500 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4501 return ref(o, OP_RV2HV);
ed6116ce
LW		 4502
4503 case OP_RV2SV:
4504 case OP_RV2AV:
79072805 4505 o->op_type = OP_RV2HV;
22c35a8c 4506 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4507 ref(o, OP_RV2HV);
ed6116ce
LW		 4508 break;
4509
4510 default:
0453d815
PM		 4511 if (ckWARN_d(WARN_INTERNAL))
4512 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4513 break;
4514 }
79072805
LW		 4515 return o;
4516}
4517
4518OP *
864dbfa3 4519Perl_newAVREF(pTHX_ OP *o)
79072805 4520{
ed6116ce
LW		 4521 if (o->op_type == OP_PADANY) {
4522 o->op_type = OP_PADAV;
22c35a8c 4523 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4524 return o;
ed6116ce 4525 }
79072805
LW		 4526 return newUNOP(OP_RV2AV, 0, scalar(o));
4527}
4528
4529OP *
864dbfa3 4530Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4531{
82092f1d 4532 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4533 return newUNOP(OP_NULL, 0, o);
748a9306 4534 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4535}
4536
4537OP *
864dbfa3 4538Perl_newHVREF(pTHX_ OP *o)
79072805 4539{
ed6116ce
LW		 4540 if (o->op_type == OP_PADANY) {
4541 o->op_type = OP_PADHV;
22c35a8c 4542 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4543 return o;
ed6116ce 4544 }
79072805
LW		 4545 return newUNOP(OP_RV2HV, 0, scalar(o));
4546}
4547
4548OP *
864dbfa3 4549Perl_oopsCV(pTHX_ OP *o)
79072805 4550{
cea2e8a9 4551 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4552 /* STUB */
4553 return o;
4554}
4555
4556OP *
864dbfa3 4557Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4558{
c07a80fd 4559 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4560}
4561
4562OP *
864dbfa3 4563Perl_newSVREF(pTHX_ OP *o)
79072805 4564{
ed6116ce
LW		 4565 if (o->op_type == OP_PADANY) {
4566 o->op_type = OP_PADSV;
22c35a8c 4567 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4568 return o;
ed6116ce 4569 }
224a4551
MB		 4570 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4571 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4572 return o;
224a4551 4573 }
79072805
LW		 4574 return newUNOP(OP_RV2SV, 0, scalar(o));
4575}
4576
4577/* Check routines. */
4578
4579OP *
cea2e8a9 4580Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4581{
178c6305
CS		 4582 PADOFFSET ix;
4583 SV* name;
4584
4585 name = NEWSV(1106,0);
4586 sv_upgrade(name, SVt_PVNV);
4587 sv_setpvn(name, "&", 1);
4588 SvIVX(name) = -1;
4589 SvNVX(name) = 1;
5dc0d613 4590 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4591 av_store(PL_comppad_name, ix, name);
4592 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4593 SvPADMY_on(cSVOPo->op_sv);
4594 cSVOPo->op_sv = Nullsv;
4595 cSVOPo->op_targ = ix;
4596 return o;
5f05dabc 4597}
4598
4599OP *
cea2e8a9 4600Perl_ck_bitop(pTHX_ OP *o)
55497cff 4601{
3280af22 4602 o->op_private = PL_hints;
5dc0d613 4603 return o;
55497cff 4604}
4605
4606OP *
cea2e8a9 4607Perl_ck_concat(pTHX_ OP *o)
79072805 4608{
11343788
MB		 4609 if (cUNOPo->op_first->op_type == OP_CONCAT)
4610 o->op_flags |= OPf_STACKED;
4611 return o;
79072805
LW		 4612}
4613
4614OP *
cea2e8a9 4615Perl_ck_spair(pTHX_ OP *o)
79072805 4616{
11343788 4617 if (o->op_flags & OPf_KIDS) {
79072805 4618 OP* newop;
a0d0e21e 4619 OP* kid;
5dc0d613
MB		 4620 OPCODE type = o->op_type;
4621 o = modkids(ck_fun(o), type);
11343788 4622 kid = cUNOPo->op_first;
a0d0e21e
LW		 4623 newop = kUNOP->op_first->op_sibling;
4624 if (newop &&
4625 (newop->op_sibling ||
22c35a8c 4626 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4627 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4628 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4629
11343788 4630 return o;
a0d0e21e
LW		 4631 }
4632 op_free(kUNOP->op_first);
4633 kUNOP->op_first = newop;
4634 }
22c35a8c 4635 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4636 return ck_fun(o);
a0d0e21e
LW		 4637}
4638
4639OP *
cea2e8a9 4640Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4641{
11343788 4642 o = ck_fun(o);
5dc0d613 4643 o->op_private = 0;
11343788
MB		 4644 if (o->op_flags & OPf_KIDS) {
4645 OP *kid = cUNOPo->op_first;
5f05dabc 4646 if (kid->op_type == OP_HSLICE)
5dc0d613 4647 o->op_private |= OPpSLICE;
5f05dabc 4648 else if (kid->op_type != OP_HELEM)
cea2e8a9 4649 Perl_croak(aTHX_ "%s argument is not a HASH element or slice",
22c35a8c 4650 PL_op_desc[o->op_type]);
a0d0e21e 4651 null(kid);
79072805 4652 }
11343788 4653 return o;
79072805
LW		 4654}
4655
4656OP *
cea2e8a9 4657Perl_ck_eof(pTHX_ OP *o)
79072805 4658{
11343788 4659 I32 type = o->op_type;
79072805 4660
11343788
MB		 4661 if (o->op_flags & OPf_KIDS) {
4662 if (cLISTOPo->op_first->op_type == OP_STUB) {
4663 op_free(o);
4664 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4665 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4666 }
11343788 4667 return ck_fun(o);
79072805 4668 }
11343788 4669 return o;
79072805
LW		 4670}
4671
4672OP *
cea2e8a9 4673Perl_ck_eval(pTHX_ OP *o)
79072805 4674{
3280af22 4675 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4676 if (o->op_flags & OPf_KIDS) {
4677 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4678
93a17b20 4679 if (!kid) {
11343788
MB		 4680 o->op_flags &= ~OPf_KIDS;
4681 null(o);
79072805
LW		 4682 }
4683 else if (kid->op_type == OP_LINESEQ) {
4684 LOGOP *enter;
4685
11343788
MB		 4686 kid->op_next = o->op_next;
4687 cUNOPo->op_first = 0;
4688 op_free(o);
79072805 4689
b7dc083c 4690 NewOp(1101, enter, 1, LOGOP);
79072805 4691 enter->op_type = OP_ENTERTRY;
22c35a8c 4692 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4693 enter->op_private = 0;
4694
4695 /* establish postfix order */
4696 enter->op_next = (OP*)enter;
4697
11343788
MB		 4698 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4699 o->op_type = OP_LEAVETRY;
22c35a8c 4700 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4701 enter->op_other = o;
4702 return o;
79072805 4703 }
c7cc6f1c 4704 else
473986ff 4705 scalar((OP*)kid);
79072805
LW		 4706 }
4707 else {
11343788 4708 op_free(o);
54b9620d 4709 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4710 }
3280af22 4711 o->op_targ = (PADOFFSET)PL_hints;
11343788 4712 return o;
79072805
LW		 4713}
4714
4715OP *
cea2e8a9 4716Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 4717{
4718 OP *kid;
11343788
MB		 4719 if (o->op_flags & OPf_STACKED) {
4720 o = ck_fun(o);
4721 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4722 if (kid->op_type == OP_RV2GV)
4723 null(kid);
79072805 4724 }
463ee0b2 4725 else
11343788
MB		 4726 o = listkids(o);
4727 return o;
79072805
LW		 4728}
4729
4730OP *
cea2e8a9 4731Perl_ck_exists(pTHX_ OP *o)
5f05dabc 4732{
5196be3e
MB		 4733 o = ck_fun(o);
4734 if (o->op_flags & OPf_KIDS) {
4735 OP *kid = cUNOPo->op_first;
5f05dabc 4736 if (kid->op_type != OP_HELEM)
cea2e8a9 4737 Perl_croak(aTHX_ "%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4738 null(kid);
4739 }
5196be3e 4740 return o;
5f05dabc 4741}
4742
22c35a8c 4743#if 0
5f05dabc 4744OP *
cea2e8a9 4745Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 4746{
4747 o = fold_constants(o);
4748 if (o->op_type == OP_CONST)
4749 o->op_type = OP_GV;
4750 return o;
4751}
22c35a8c 4752#endif
79072805
LW		 4753
4754OP *
cea2e8a9 4755Perl_ck_rvconst(pTHX_ register OP *o)
79072805 4756{
11343788
MB		 4757 dTHR;
4758 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4759
3280af22 4760 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4761 if (kid->op_type == OP_CONST) {
44a8e56a 4762 char *name;
4763 int iscv;
4764 GV *gv;
779c5bc9 4765 SV *kidsv = kid->op_sv;
2d8e6c8d 4766 STRLEN n_a;
44a8e56a 4767
779c5bc9
GS		 4768 /* Is it a constant from cv_const_sv()? */
4769 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4770 SV *rsv = SvRV(kidsv);
4771 int svtype = SvTYPE(rsv);
4772 char *badtype = Nullch;
4773
4774 switch (o->op_type) {
4775 case OP_RV2SV:
4776 if (svtype > SVt_PVMG)
4777 badtype = "a SCALAR";
4778 break;
4779 case OP_RV2AV:
4780 if (svtype != SVt_PVAV)
4781 badtype = "an ARRAY";
4782 break;
4783 case OP_RV2HV:
4784 if (svtype != SVt_PVHV) {
4785 if (svtype == SVt_PVAV) { /* pseudohash? */
4786 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4787 if (ksv && SvROK(*ksv)
4788 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4789 {
4790 break;
4791 }
4792 }
4793 badtype = "a HASH";
4794 }
4795 break;
4796 case OP_RV2CV:
4797 if (svtype != SVt_PVCV)
4798 badtype = "a CODE";
4799 break;
4800 }
4801 if (badtype)
cea2e8a9 4802 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 4803 return o;
4804 }
2d8e6c8d 4805 name = SvPV(kidsv, n_a);
3280af22 4806 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4807 char *badthing = Nullch;
5dc0d613 4808 switch (o->op_type) {
44a8e56a 4809 case OP_RV2SV:
4810 badthing = "a SCALAR";
4811 break;
4812 case OP_RV2AV:
4813 badthing = "an ARRAY";
4814 break;
4815 case OP_RV2HV:
4816 badthing = "a HASH";
4817 break;
4818 }
4819 if (badthing)
cea2e8a9 4820 Perl_croak(aTHX_
44a8e56a 4821 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4822 name, badthing);
4823 }
93233ece
CS		 4824 /*
4825 * This is a little tricky. We only want to add the symbol if we
4826 * didn't add it in the lexer. Otherwise we get duplicate strict
4827 * warnings. But if we didn't add it in the lexer, we must at
4828 * least pretend like we wanted to add it even if it existed before,
4829 * or we get possible typo warnings. OPpCONST_ENTERED says
4830 * whether the lexer already added THIS instance of this symbol.
4831 */
5196be3e 4832 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4833 do {
44a8e56a 4834 gv = gv_fetchpv(name,
748a9306 4835 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4836 iscv
4837 ? SVt_PVCV
11343788 4838 : o->op_type == OP_RV2SV
a0d0e21e 4839 ? SVt_PV
11343788 4840 : o->op_type == OP_RV2AV
a0d0e21e 4841 ? SVt_PVAV
11343788 4842 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4843 ? SVt_PVHV
4844 : SVt_PVGV);
93233ece
CS		 4845 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4846 if (gv) {
4847 kid->op_type = OP_GV;
4848 SvREFCNT_dec(kid->op_sv);
4849 kid->op_sv = SvREFCNT_inc(gv);
76cd736e 4850 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 4851 }
79072805 4852 }
11343788 4853 return o;
79072805
LW		 4854}
4855
4856OP *
cea2e8a9 4857Perl_ck_ftst(pTHX_ OP *o)
79072805 4858{
11343788
MB		 4859 dTHR;
4860 I32 type = o->op_type;
79072805 4861
11343788
MB		 4862 if (o->op_flags & OPf_REF)
4863 return o;
79072805 4864
108ed793 4865 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4866 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4867
4868 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 4869 STRLEN n_a;
a0d0e21e 4870 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 4871 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 4872 op_free(o);
79072805
LW		 4873 return newop;
4874 }
4875 }
4876 else {
11343788 4877 op_free(o);
79072805 4878 if (type == OP_FTTTY)
fb73857a 4879 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4880 SVt_PVIO));
79072805 4881 else
54b9620d 4882 return newUNOP(type, 0, newDEFSVOP());
79072805 4883 }
11343788 4884 return o;
79072805
LW		 4885}
4886
4887OP *
cea2e8a9 4888Perl_ck_fun(pTHX_ OP *o)
79072805 4889{
11343788 4890 dTHR;
79072805
LW		 4891 register OP *kid;
4892 OP **tokid;
4893 OP *sibl;
4894 I32 numargs = 0;
11343788 4895 int type = o->op_type;
22c35a8c 4896 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 4897
11343788 4898 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4899 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4900 oa &= ~OA_OPTIONAL;
4901 else
11343788 4902 return no_fh_allowed(o);
79072805
LW		 4903 }
4904
11343788 4905 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 4906 STRLEN n_a;
11343788
MB		 4907 tokid = &cLISTOPo->op_first;
4908 kid = cLISTOPo->op_first;
8990e307
LW		 4909 if (kid->op_type == OP_PUSHMARK ||
4910 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4911 {
79072805
LW		 4912 tokid = &kid->op_sibling;
4913 kid = kid->op_sibling;
4914 }
22c35a8c 4915 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 4916 *tokid = kid = newDEFSVOP();
79072805
LW		 4917
4918 while (oa && kid) {
4919 numargs++;
4920 sibl = kid->op_sibling;
4921 switch (oa & 7) {
4922 case OA_SCALAR:
62c18ce2
GS		 4923 /* list seen where single (scalar) arg expected? */
4924 if (numargs == 1 && !(oa >> 4)
4925 && kid->op_type == OP_LIST && type != OP_SCALAR)
4926 {
4927 return too_many_arguments(o,PL_op_desc[type]);
4928 }
79072805
LW		 4929 scalar(kid);
4930 break;
4931 case OA_LIST:
4932 if (oa < 16) {
4933 kid = 0;
4934 continue;
4935 }
4936 else
4937 list(kid);
4938 break;
4939 case OA_AVREF:
4940 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 4941 (kid->op_private & OPpCONST_BARE))
4942 {
2d8e6c8d 4943 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4944 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4945 gv_fetchpv(name, TRUE, SVt_PVAV) ));
cf2093f6 4946#ifdef IV_IS_QUAD
b9c39e73 4947 if (ckWARN(WARN_SYNTAX))
cf2093f6
JH		 4948 Perl_warner(aTHX_ WARN_SYNTAX,
4949 "Array @%s missing the @ in argument %" PERL_PRId64 " of %s()",
4950 name, (IV)numargs, PL_op_desc[type]);
4951#else
b9c39e73 4952 if (ckWARN(WARN_SYNTAX))
cea2e8a9 4953 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 4954 "Array @%s missing the @ in argument %ld of %s()",
22c35a8c 4955 name, (long)numargs, PL_op_desc[type]);
cf2093f6 4956#endif
79072805
LW		 4957 op_free(kid);
4958 kid = newop;
4959 kid->op_sibling = sibl;
4960 *tokid = kid;
4961 }
8990e307 4962 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 4963 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 4964 mod(kid, type);
79072805
LW		 4965 break;
4966 case OA_HVREF:
4967 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 4968 (kid->op_private & OPpCONST_BARE))
4969 {
2d8e6c8d 4970 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4971 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4972 gv_fetchpv(name, TRUE, SVt_PVHV) ));
cf2093f6 4973#ifdef IV_IS_QUAD
b9c39e73 4974 if (ckWARN(WARN_SYNTAX))
cf2093f6
JH		 4975 Perl_warner(aTHX_ WARN_SYNTAX,
4976 "Hash %%%s missing the %% in argument %" PERL_PRId64 " of %s()",
4977 name, (IV)numargs, PL_op_desc[type]);
4978#else
b9c39e73 4979 if (ckWARN(WARN_SYNTAX))
cea2e8a9 4980 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 4981 "Hash %%%s missing the %% in argument %ld of %s()",
22c35a8c 4982 name, (long)numargs, PL_op_desc[type]);
cf2093f6 4983#endif
79072805
LW		 4984 op_free(kid);
4985 kid = newop;
4986 kid->op_sibling = sibl;
4987 *tokid = kid;
4988 }
8990e307 4989 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 4990 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 4991 mod(kid, type);
79072805
LW		 4992 break;
4993 case OA_CVREF:
4994 {
a0d0e21e 4995 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4996 kid->op_sibling = 0;
4997 linklist(kid);
4998 newop->op_next = newop;
4999 kid = newop;
5000 kid->op_sibling = sibl;
5001 *tokid = kid;
5002 }
5003 break;
5004 case OA_FILEREF:
c340be78 5005 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5006 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5007 (kid->op_private & OPpCONST_BARE))
5008 {
79072805 5009 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5010 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5011 SVt_PVIO) );
79072805
LW		 5012 op_free(kid);
5013 kid = newop;
5014 }
1ea32a52
GS		 5015 else if (kid->op_type == OP_READLINE) {
5016 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5017 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5018 }
79072805 5019 else {
35cd451c 5020 I32 flags = OPf_SPECIAL;
a6c40364 5021 I32 priv = 0;
35cd451c 5022 /* is this op a FH constructor? */
853846ea 5023 if (is_handle_constructor(o,numargs)) {
1d8d4d2a 5024 flags = 0;
853846ea
NIS		 5025 /* Set a flag to tell rv2gv to vivify
5026 * need to "prove" flag does not mean something
5027 * else already - NI-S 1999/05/07
5028 */
a6c40364 5029 priv = OPpDEREF;
1d8d4d2a
NIS		 5030#if 0
5031 /* Helps with open($array[$n],...)
5032 but is too simplistic - need to do selectively
5033 */
5034 mod(kid,type);
5035#endif
853846ea 5036 }
79072805 5037 kid->op_sibling = 0;
35cd451c 5038 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
a6c40364
GS		 5039 if (priv) {
5040 kid->op_private |= priv;
1d8d4d2a 5041 }
79072805
LW		 5042 }
5043 kid->op_sibling = sibl;
5044 *tokid = kid;
5045 }
5046 scalar(kid);
5047 break;
5048 case OA_SCALARREF:
a0d0e21e 5049 mod(scalar(kid), type);
79072805
LW		 5050 break;
5051 }
5052 oa >>= 4;
5053 tokid = &kid->op_sibling;
5054 kid = kid->op_sibling;
5055 }
11343788 5056 o->op_private |= numargs;
79072805 5057 if (kid)
22c35a8c 5058 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5059 listkids(o);
79072805 5060 }
22c35a8c 5061 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5062 op_free(o);
54b9620d 5063 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5064 }
5065
79072805
LW		 5066 if (oa) {
5067 while (oa & OA_OPTIONAL)
5068 oa >>= 4;
5069 if (oa && oa != OA_LIST)
22c35a8c 5070 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5071 }
11343788 5072 return o;
79072805
LW		 5073}
5074
5075OP *
cea2e8a9 5076Perl_ck_glob(pTHX_ OP *o)
79072805 5077{
fb73857a 5078 GV *gv;
5079
1f2bfc8a 5080 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5081 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5082
5083 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5084 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5085
5086 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5087 append_elem(OP_GLOB, o,
80252599 5088 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5089 o->op_type = OP_LIST;
22c35a8c 5090 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5091 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5092 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5093 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5094 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5095 scalar(newUNOP(OP_RV2CV, 0,
5096 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5097 o = newUNOP(OP_NULL, 0, ck_subr(o));
5098 o->op_targ = OP_GLOB; /* hint at what it used to be */
5099 return o;
b1cb66bf 5100 }
5101 gv = newGVgen("main");
a0d0e21e 5102 gv_IOadd(gv);
11343788
MB		 5103 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5104 scalarkids(o);
5105 return ck_fun(o);
79072805
LW		 5106}
5107
5108OP *
cea2e8a9 5109Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5110{
5111 LOGOP *gwop;
5112 OP *kid;
11343788 5113 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5114
22c35a8c 5115 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5116 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5117
11343788 5118 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5119 OP* k;
11343788
MB		 5120 o = ck_sort(o);
5121 kid = cLISTOPo->op_first->op_sibling;
5122 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5123 kid = k;
5124 }
5125 kid->op_next = (OP*)gwop;
11343788 5126 o->op_flags &= ~OPf_STACKED;
93a17b20 5127 }
11343788 5128 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5129 if (type == OP_MAPWHILE)
5130 list(kid);
5131 else
5132 scalar(kid);
11343788 5133 o = ck_fun(o);
3280af22 5134 if (PL_error_count)
11343788 5135 return o;
aeea060c 5136 kid = cLISTOPo->op_first->op_sibling;
79072805 5137 if (kid->op_type != OP_NULL)
cea2e8a9 5138 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5139 kid = kUNOP->op_first;
5140
a0d0e21e 5141 gwop->op_type = type;
22c35a8c 5142 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5143 gwop->op_first = listkids(o);
79072805
LW		 5144 gwop->op_flags |= OPf_KIDS;
5145 gwop->op_private = 1;
5146 gwop->op_other = LINKLIST(kid);
a0d0e21e 5147 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5148 kid->op_next = (OP*)gwop;
5149
11343788 5150 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5151 if (!kid || !kid->op_sibling)
22c35a8c 5152 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5153 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5154 mod(kid, OP_GREPSTART);
5155
79072805
LW		 5156 return (OP*)gwop;
5157}
5158
5159OP *
cea2e8a9 5160Perl_ck_index(pTHX_ OP *o)
79072805 5161{
11343788
MB		 5162 if (o->op_flags & OPf_KIDS) {
5163 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5164 if (kid)
5165 kid = kid->op_sibling; /* get past "big" */
79072805 5166 if (kid && kid->op_type == OP_CONST)
2779dcf1 5167 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5168 }
11343788 5169 return ck_fun(o);
79072805
LW		 5170}
5171
5172OP *
cea2e8a9 5173Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5174{
5175 /* XXX length optimization goes here */
11343788 5176 return ck_fun(o);
79072805
LW		 5177}
5178
5179OP *
cea2e8a9 5180Perl_ck_lfun(pTHX_ OP *o)
79072805 5181{
5dc0d613
MB		 5182 OPCODE type = o->op_type;
5183 return modkids(ck_fun(o), type);
79072805
LW		 5184}
5185
5186OP *
cea2e8a9 5187Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5188{
20ce7b12 5189 dTHR;
d0334bed
GS		 5190 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5191 switch (cUNOPo->op_first->op_type) {
5192 case OP_RV2AV:
7e291ef1 5193 break; /* Globals via GV can be undef */
d0334bed
GS		 5194 case OP_PADAV:
5195 case OP_AASSIGN: /* Is this a good idea? */
5196 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5197 "defined(@array) is deprecated");
d0334bed
GS		 5198 Perl_warner(aTHX_ WARN_DEPRECATED,
5199 "(Maybe you should just omit the defined()?)\n");
69794302 5200 break;
d0334bed 5201 case OP_RV2HV:
7e291ef1 5202 break; /* Globals via GV can be undef */
d0334bed
GS		 5203 case OP_PADHV:
5204 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5205 "defined(%hash) is deprecated");
d0334bed
GS		 5206 Perl_warner(aTHX_ WARN_DEPRECATED,
5207 "(Maybe you should just omit the defined()?)\n");
5208 break;
5209 default:
5210 /* no warning */
5211 break;
5212 }
69794302
MJD		 5213 }
5214 return ck_rfun(o);
5215}
5216
5217OP *
cea2e8a9 5218Perl_ck_rfun(pTHX_ OP *o)
8990e307 5219{
5dc0d613
MB		 5220 OPCODE type = o->op_type;
5221 return refkids(ck_fun(o), type);
8990e307
LW		 5222}
5223
5224OP *
cea2e8a9 5225Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5226{
5227 register OP *kid;
aeea060c 5228
11343788 5229 kid = cLISTOPo->op_first;
79072805 5230 if (!kid) {
11343788
MB		 5231 o = force_list(o);
5232 kid = cLISTOPo->op_first;
79072805
LW		 5233 }
5234 if (kid->op_type == OP_PUSHMARK)
5235 kid = kid->op_sibling;
11343788 5236 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5237 kid = kid->op_sibling;
5238 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5239 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5240 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5241 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5242 cLISTOPo->op_first->op_sibling = kid;
5243 cLISTOPo->op_last = kid;
79072805
LW		 5244 kid = kid->op_sibling;
5245 }
5246 }
5247
5248 if (!kid)
54b9620d 5249 append_elem(o->op_type, o, newDEFSVOP());
79072805 5250
5dc0d613 5251 o = listkids(o);
bbce6d69 5252
5dc0d613 5253 o->op_private = 0;
36477c24 5254#ifdef USE_LOCALE
3280af22 5255 if (PL_hints & HINT_LOCALE)
5dc0d613 5256 o->op_private |= OPpLOCALE;
bbce6d69 5257#endif
5258
5dc0d613 5259 return o;
bbce6d69 5260}
5261
5262OP *
cea2e8a9 5263Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5264{
5dc0d613 5265 o = ck_fun(o);
bbce6d69 5266
5dc0d613 5267 o->op_private = 0;
36477c24 5268#ifdef USE_LOCALE
3280af22 5269 if (PL_hints & HINT_LOCALE)
5dc0d613 5270 o->op_private |= OPpLOCALE;
bbce6d69 5271#endif
5272
5dc0d613 5273 return o;
bbce6d69 5274}
5275
5276OP *
b162f9ea
IZ		 5277Perl_ck_sassign(pTHX_ OP *o)
5278{
5279 OP *kid = cLISTOPo->op_first;
5280 /* has a disposable target? */
5281 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5282 && !(kid->op_flags & OPf_STACKED))
5283 {
5284 OP *kkid = kid->op_sibling;
5285
5286 /* Can just relocate the target. */
2c2d71f5
JH		 5287 if (kkid && kkid->op_type == OP_PADSV
5288 && !(kkid->op_private & OPpLVAL_INTRO))
5289 {
b162f9ea
IZ		 5290 /* Concat has problems if target is equal to right arg. */
5291 if (kid->op_type == OP_CONCAT
5292 && kLISTOP->op_first->op_sibling->op_type == OP_PADSV
5293 && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
5294 {
5295 return o;
5296 }
c212fd85
IZ		 5297 if (kid->op_type == OP_JOIN) {
5298 /* do_join has problems the arguments coincide with target.
5299 In fact the second argument *can* safely coincide,
5300 but ignore=pessimize this rare occasion. */
5301 OP *arg = kLISTOP->op_first->op_sibling; /* Skip PUSHMARK */
5302
5303 while (arg) {
5304 if (arg->op_type == OP_PADSV
5305 && arg->op_targ == kkid->op_targ)
5306 return o;
5307 arg = arg->op_sibling;
5308 }
5309 }
b162f9ea
IZ		 5310 kid->op_targ = kkid->op_targ;
5311 /* Now we do not need PADSV and SASSIGN. */
5312 kid->op_sibling = o->op_sibling; /* NULL */
5313 cLISTOPo->op_first = NULL;
5314 op_free(o);
5315 op_free(kkid);
5316 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5317 return kid;
5318 }
5319 }
5320 return o;
5321}
5322
5323OP *
cea2e8a9 5324Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5325{
5dc0d613 5326 o->op_private = 0;
36477c24 5327#ifdef USE_LOCALE
3280af22 5328 if (PL_hints & HINT_LOCALE)
5dc0d613 5329 o->op_private |= OPpLOCALE;
bbce6d69 5330#endif
36477c24 5331
5dc0d613 5332 return o;
79072805
LW		 5333}
5334
5335OP *
cea2e8a9 5336Perl_ck_match(pTHX_ OP *o)
79072805 5337{
5dc0d613 5338 o->op_private |= OPpRUNTIME;
11343788 5339 return o;
79072805
LW		 5340}
5341
5342OP *
f5d5a27c
CS		 5343Perl_ck_method(pTHX_ OP *o)
5344{
5345 OP *kid = cUNOPo->op_first;
5346 if (kid->op_type == OP_CONST) {
5347 SV* sv = kSVOP->op_sv;
5348 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5349 OP *cmop;
5350 sv_upgrade(sv, SVt_PVIV);
5351 SvIOK_on(sv);
5352 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5353 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5354 kSVOP->op_sv = Nullsv;
5355 op_free(o);
5356 return cmop;
5357 }
5358 }
5359 return o;
5360}
5361
5362OP *
cea2e8a9 5363Perl_ck_null(pTHX_ OP *o)
79072805 5364{
11343788 5365 return o;
79072805
LW		 5366}
5367
5368OP *
cea2e8a9 5369Perl_ck_repeat(pTHX_ OP *o)
79072805 5370{
11343788
MB		 5371 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5372 o->op_private |= OPpREPEAT_DOLIST;
5373 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5374 }
5375 else
11343788
MB		 5376 scalar(o);
5377 return o;
79072805
LW		 5378}
5379
5380OP *
cea2e8a9 5381Perl_ck_require(pTHX_ OP *o)
8990e307 5382{
11343788
MB		 5383 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5384 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5385
5386 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5387 char *s;
a0d0e21e
LW		 5388 for (s = SvPVX(kid->op_sv); *s; s++) {
5389 if (*s == ':' && s[1] == ':') {
5390 *s = '/';
1aef975c 5391 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5392 --SvCUR(kid->op_sv);
5393 }
8990e307 5394 }
a0d0e21e 5395 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5396 }
5397 }
11343788 5398 return ck_fun(o);
8990e307
LW		 5399}
5400
22c35a8c 5401#if 0
8990e307 5402OP *
cea2e8a9 5403Perl_ck_retarget(pTHX_ OP *o)
79072805 5404{
cea2e8a9 5405 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5406 /* STUB */
11343788 5407 return o;
79072805 5408}
22c35a8c 5409#endif
79072805
LW		 5410
5411OP *
cea2e8a9 5412Perl_ck_select(pTHX_ OP *o)
79072805 5413{
c07a80fd 5414 OP* kid;
11343788
MB		 5415 if (o->op_flags & OPf_KIDS) {
5416 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5417 if (kid && kid->op_sibling) {
11343788 5418 o->op_type = OP_SSELECT;
22c35a8c 5419 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5420 o = ck_fun(o);
5421 return fold_constants(o);
79072805
LW		 5422 }
5423 }
11343788
MB		 5424 o = ck_fun(o);
5425 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5426 if (kid && kid->op_type == OP_RV2GV)
5427 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5428 return o;
79072805
LW		 5429}
5430
5431OP *
cea2e8a9 5432Perl_ck_shift(pTHX_ OP *o)
79072805 5433{
11343788 5434 I32 type = o->op_type;
79072805 5435
11343788 5436 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5437 OP *argop;
5438
11343788 5439 op_free(o);
6d4ff0d2 5440#ifdef USE_THREADS
533c011a 5441 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5442 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5443 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5444 }
5445 else {
5446 argop = newUNOP(OP_RV2AV, 0,
5447 scalar(newGVOP(OP_GV, 0,
5448 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5449 }
5450#else
5451 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5452 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5453 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5454#endif /* USE_THREADS */
5455 return newUNOP(type, 0, scalar(argop));
79072805 5456 }
11343788 5457 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5458}
5459
5460OP *
cea2e8a9 5461Perl_ck_sort(pTHX_ OP *o)
79072805 5462{
5dc0d613 5463 o->op_private = 0;
36477c24 5464#ifdef USE_LOCALE
3280af22 5465 if (PL_hints & HINT_LOCALE)
5dc0d613 5466 o->op_private |= OPpLOCALE;
bbce6d69 5467#endif
5468
9ea6e965 5469 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5470 simplify_sort(o);
9c007264 5471 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5472 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5473 OP *k;
82092f1d 5474 kid = kUNOP->op_first; /* get past null */
79072805 5475
463ee0b2 5476 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5477 linklist(kid);
463ee0b2
LW		 5478 if (kid->op_type == OP_SCOPE) {
5479 k = kid->op_next;
5480 kid->op_next = 0;
79072805 5481 }
463ee0b2 5482 else if (kid->op_type == OP_LEAVE) {
11343788 5483 if (o->op_type == OP_SORT) {
748a9306
LW		 5484 null(kid); /* wipe out leave */
5485 kid->op_next = kid;
463ee0b2 5486
748a9306
LW		 5487 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5488 if (k->op_next == kid)
5489 k->op_next = 0;
5490 }
463ee0b2 5491 }
748a9306
LW		 5492 else
5493 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5494 k = kLISTOP->op_first;
463ee0b2 5495 }
a0d0e21e
LW		 5496 peep(k);
5497
11343788 5498 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5499 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5500 kid->op_next = kid;
5501 else
5502 kid->op_next = k;
11343788 5503 o->op_flags |= OPf_SPECIAL;
79072805 5504 }
c6e96bcb
GS		 5505 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5506 null(cLISTOPo->op_first->op_sibling);
79072805 5507 }
bbce6d69 5508
11343788 5509 return o;
79072805 5510}
bda4119b
GS		 5511
5512STATIC void
cea2e8a9 5513S_simplify_sort(pTHX_ OP *o)
9c007264 5514{
51a19bc0 5515 dTHR;
9c007264
JH		 5516 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5517 OP *k;
5518 int reversed;
5519 if (!(o->op_flags & OPf_STACKED))
5520 return;
9ea6e965
GS		 5521 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5522 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5523 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5524 if (kid->op_type != OP_SCOPE)
5525 return;
5526 kid = kLISTOP->op_last; /* get past scope */
5527 switch(kid->op_type) {
5528 case OP_NCMP:
5529 case OP_I_NCMP:
5530 case OP_SCMP:
5531 break;
5532 default:
5533 return;
5534 }
5535 k = kid; /* remember this node*/
5536 if (kBINOP->op_first->op_type != OP_RV2SV)
5537 return;
5538 kid = kBINOP->op_first; /* get past cmp */
5539 if (kUNOP->op_first->op_type != OP_GV)
5540 return;
5541 kid = kUNOP->op_first; /* get past rv2sv */
5542 if (GvSTASH(kGVOP->op_gv) != PL_curstash)
5543 return;
5544 if (strEQ(GvNAME(kGVOP->op_gv), "a"))
5545 reversed = 0;
5546 else if(strEQ(GvNAME(kGVOP->op_gv), "b"))
5547 reversed = 1;
5548 else
5549 return;
5550 kid = k; /* back to cmp */
5551 if (kBINOP->op_last->op_type != OP_RV2SV)
5552 return;
5553 kid = kBINOP->op_last; /* down to 2nd arg */
5554 if (kUNOP->op_first->op_type != OP_GV)
5555 return;
5556 kid = kUNOP->op_first; /* get past rv2sv */
5557 if (GvSTASH(kGVOP->op_gv) != PL_curstash
5558 || ( reversed
5559 ? strNE(GvNAME(kGVOP->op_gv), "a")
5560 : strNE(GvNAME(kGVOP->op_gv), "b")))
5561 return;
5562 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5563 if (reversed)
5564 o->op_private |= OPpSORT_REVERSE;
5565 if (k->op_type == OP_NCMP)
5566 o->op_private |= OPpSORT_NUMERIC;
5567 if (k->op_type == OP_I_NCMP)
5568 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5569 kid = cLISTOPo->op_first->op_sibling;
5570 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5571 op_free(kid); /* then delete it */
5572 cLISTOPo->op_children--;
9c007264 5573}
79072805
LW		 5574
5575OP *
cea2e8a9 5576Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5577{
5578 register OP *kid;
aeea060c 5579
11343788
MB		 5580 if (o->op_flags & OPf_STACKED)
5581 return no_fh_allowed(o);
79072805 5582
11343788 5583 kid = cLISTOPo->op_first;
8990e307 5584 if (kid->op_type != OP_NULL)
cea2e8a9 5585 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5586 kid = kid->op_sibling;
11343788
MB		 5587 op_free(cLISTOPo->op_first);
5588 cLISTOPo->op_first = kid;
85e6fe83 5589 if (!kid) {
79cb57f6 5590 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5591 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5592 }
79072805
LW		 5593
5594 if (kid->op_type != OP_MATCH) {
5595 OP *sibl = kid->op_sibling;
463ee0b2 5596 kid->op_sibling = 0;
79072805 5597 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5598 if (cLISTOPo->op_first == cLISTOPo->op_last)
5599 cLISTOPo->op_last = kid;
5600 cLISTOPo->op_first = kid;
79072805
LW		 5601 kid->op_sibling = sibl;
5602 }
5603
5604 kid->op_type = OP_PUSHRE;
22c35a8c 5605 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5606 scalar(kid);
5607
5608 if (!kid->op_sibling)
54b9620d 5609 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5610
5611 kid = kid->op_sibling;
5612 scalar(kid);
5613
5614 if (!kid->op_sibling)
11343788 5615 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5616
5617 kid = kid->op_sibling;
5618 scalar(kid);
5619
5620 if (kid->op_sibling)
22c35a8c 5621 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5622
11343788 5623 return o;
79072805
LW		 5624}
5625
5626OP *
cea2e8a9 5627Perl_ck_subr(pTHX_ OP *o)
79072805 5628{
11343788
MB		 5629 dTHR;
5630 OP *prev = ((cUNOPo->op_first->op_sibling)
5631 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5632 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5633 OP *cvop;
5634 char *proto = 0;
5635 CV *cv = 0;
46fc3d4c 5636 GV *namegv = 0;
4633a7c4
LW		 5637 int optional = 0;
5638 I32 arg = 0;
2d8e6c8d 5639 STRLEN n_a;
4633a7c4 5640
d3011074 5641 o->op_private |= OPpENTERSUB_HASTARG;
11343788 5642 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5643 if (cvop->op_type == OP_RV2CV) {
5644 SVOP* tmpop;
11343788 5645 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5646 null(cvop); /* disable rv2cv */
5647 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 5648 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
8ebc5c01 5649 cv = GvCVu(tmpop->op_sv);
76cd736e
GS		 5650 if (!cv)
5651 tmpop->op_private |= OPpEARLY_CV;
5652 else if (SvPOK(cv)) {
46fc3d4c 5653 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
2d8e6c8d 5654 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5655 }
4633a7c4
LW		 5656 }
5657 }
f5d5a27c 5658 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 5659 if (o2->op_type == OP_CONST)
5660 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 5661 else if (o2->op_type == OP_LIST) {
5662 OP *o = ((UNOP*)o2)->op_first->op_sibling;
5663 if (o && o->op_type == OP_CONST)
5664 o->op_private &= ~OPpCONST_STRICT;
5665 }
7a52d87a 5666 }
3280af22
NIS		 5667 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5668 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5669 o->op_private |= OPpENTERSUB_DB;
5670 while (o2 != cvop) {
4633a7c4
LW		 5671 if (proto) {
5672 switch (*proto) {
5673 case '\0':
5dc0d613 5674 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5675 case ';':
5676 optional = 1;
5677 proto++;
5678 continue;
5679 case '$':
5680 proto++;
5681 arg++;
11343788 5682 scalar(o2);
4633a7c4
LW		 5683 break;
5684 case '%':
5685 case '@':
11343788 5686 list(o2);
4633a7c4
LW		 5687 arg++;
5688 break;
5689 case '&':
5690 proto++;
5691 arg++;
11343788 5692 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5693 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5694 break;
5695 case '*':
2ba6ecf4 5696 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 5697 proto++;
5698 arg++;
11343788 5699 if (o2->op_type == OP_RV2GV)
2ba6ecf4 5700 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 5701 else if (o2->op_type == OP_CONST)
5702 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 5703 else if (o2->op_type == OP_ENTERSUB) {
5704 /* accidental subroutine, revert to bareword */
5705 OP *gvop = ((UNOP*)o2)->op_first;
5706 if (gvop && gvop->op_type == OP_NULL) {
5707 gvop = ((UNOP*)gvop)->op_first;
5708 if (gvop) {
5709 for (; gvop->op_sibling; gvop = gvop->op_sibling)
5710 ;
5711 if (gvop &&
5712 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
5713 (gvop = ((UNOP*)gvop)->op_first) &&
5714 gvop->op_type == OP_GV)
5715 {
5716 GV *gv = (GV*)((SVOP*)gvop)->op_sv;
5717 OP *sibling = o2->op_sibling;
2692f720 5718 SV *n = newSVpvn("",0);
9675f7ac 5719 op_free(o2);
2692f720
GS		 5720 gv_fullname3(n, gv, "");
5721 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
5722 sv_chop(n, SvPVX(n)+6);
5723 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 5724 prev->op_sibling = o2;
5725 o2->op_sibling = sibling;
5726 }
5727 }
5728 }
5729 }
2ba6ecf4
GS		 5730 scalar(o2);
5731 break;
4633a7c4
LW		 5732 case '\\':
5733 proto++;
5734 arg++;
5735 switch (*proto++) {
5736 case '*':
11343788 5737 if (o2->op_type != OP_RV2GV)
5dc0d613 5738 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5739 goto wrapref;
5740 case '&':
11343788 5741 if (o2->op_type != OP_RV2CV)
5dc0d613 5742 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5743 goto wrapref;
5744 case '$':
386acf99
GS		 5745 if (o2->op_type != OP_RV2SV
5746 && o2->op_type != OP_PADSV
1c01eb51
GS		 5747 && o2->op_type != OP_HELEM
5748 && o2->op_type != OP_AELEM
386acf99
GS		 5749 && o2->op_type != OP_THREADSV)
5750 {
5dc0d613 5751 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5752 }
4633a7c4
LW		 5753 goto wrapref;
5754 case '@':
11343788 5755 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5756 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5757 goto wrapref;
5758 case '%':
11343788 5759 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5760 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5761 wrapref:
5762 {
11343788 5763 OP* kid = o2;
6fa846a0 5764 OP* sib = kid->op_sibling;
4633a7c4 5765 kid->op_sibling = 0;
6fa846a0
GS		 5766 o2 = newUNOP(OP_REFGEN, 0, kid);
5767 o2->op_sibling = sib;
e858de61 5768 prev->op_sibling = o2;
4633a7c4
LW		 5769 }
5770 break;
5771 default: goto oops;
5772 }
5773 break;
b1cb66bf 5774 case ' ':
5775 proto++;
5776 continue;
4633a7c4
LW		 5777 default:
5778 oops:
cea2e8a9 5779 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 5780 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 5781 }
5782 }
5783 else
11343788
MB		 5784 list(o2);
5785 mod(o2, OP_ENTERSUB);
5786 prev = o2;
5787 o2 = o2->op_sibling;
4633a7c4 5788 }
fb73857a 5789 if (proto && !optional &&
5790 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5791 return too_few_arguments(o, gv_ename(namegv));
11343788 5792 return o;
79072805
LW		 5793}
5794
5795OP *
cea2e8a9 5796Perl_ck_svconst(pTHX_ OP *o)
8990e307 5797{
11343788
MB		 5798 SvREADONLY_on(cSVOPo->op_sv);
5799 return o;
8990e307
LW		 5800}
5801
5802OP *
cea2e8a9 5803Perl_ck_trunc(pTHX_ OP *o)
79072805 5804{
11343788
MB		 5805 if (o->op_flags & OPf_KIDS) {
5806 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5807
a0d0e21e
LW		 5808 if (kid->op_type == OP_NULL)
5809 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 5810 if (kid && kid->op_type == OP_CONST &&
5811 (kid->op_private & OPpCONST_BARE))
5812 {
11343788 5813 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 5814 kid->op_private &= ~OPpCONST_STRICT;
5815 }
79072805 5816 }
11343788 5817 return ck_fun(o);
79072805
LW		 5818}
5819
463ee0b2
LW		 5820/* A peephole optimizer. We visit the ops in the order they're to execute. */
5821
79072805 5822void
864dbfa3 5823Perl_peep(pTHX_ register OP *o)
79072805 5824{
11343788 5825 dTHR;
79072805 5826 register OP* oldop = 0;
2d8e6c8d
GS		 5827 STRLEN n_a;
5828
a0d0e21e 5829 if (!o || o->op_seq)
79072805 5830 return;
a0d0e21e 5831 ENTER;
462e5cf6 5832 SAVEOP();
3280af22 5833 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5834 for (; o; o = o->op_next) {
5835 if (o->op_seq)
5836 break;
3280af22
NIS		 5837 if (!PL_op_seqmax)
5838 PL_op_seqmax++;
533c011a 5839 PL_op = o;
a0d0e21e 5840 switch (o->op_type) {
acb36ea4 5841 case OP_SETSTATE:
a0d0e21e
LW		 5842 case OP_NEXTSTATE:
5843 case OP_DBSTATE:
3280af22
NIS		 5844 PL_curcop = ((COP*)o); /* for warnings */
5845 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5846 break;
5847
a0d0e21e 5848 case OP_CONST:
7a52d87a
GS		 5849 if (cSVOPo->op_private & OPpCONST_STRICT)
5850 no_bareword_allowed(o);
5851 /* FALL THROUGH */
a0d0e21e
LW		 5852 case OP_UC:
5853 case OP_UCFIRST:
5854 case OP_LC:
5855 case OP_LCFIRST:
ed7ab888
GS		 5856 if ( o->op_next && o->op_next->op_type == OP_STRINGIFY
5857 && !(o->op_next->op_private & OPpTARGET_MY) )
5858 null(o->op_next);
5859 o->op_seq = PL_op_seqmax++;
5860 break;
5861 case OP_CONCAT:
5862 case OP_JOIN:
a0d0e21e 5863 case OP_QUOTEMETA:
b162f9ea
IZ		 5864 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
5865 if (o->op_next->op_private & OPpTARGET_MY) {
ed7ab888 5866 if ((o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea
IZ		 5867 || (o->op_type == OP_CONCAT
5868 /* Concat has problems if target is equal to right arg. */
5869 && (((LISTOP*)o)->op_first->op_sibling->op_type
5870 == OP_PADSV)
5871 && (((LISTOP*)o)->op_first->op_sibling->op_targ
5872 == o->op_next->op_targ))) {
5873 goto ignore_optimization;
5874 } else {
5875 o->op_targ = o->op_next->op_targ;
2c2d71f5 5876 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 5877 }
5878 }
a0d0e21e 5879 null(o->op_next);
b162f9ea
IZ		 5880 }
5881 ignore_optimization:
3280af22 5882 o->op_seq = PL_op_seqmax++;
a0d0e21e 5883 break;
8990e307 5884 case OP_STUB:
54310121 5885 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5886 o->op_seq = PL_op_seqmax++;
54310121 5887 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5888 }
748a9306 5889 goto nothin;
79072805 5890 case OP_NULL:
acb36ea4
GS		 5891 if (o->op_targ == OP_NEXTSTATE
5892 || o->op_targ == OP_DBSTATE
5893 || o->op_targ == OP_SETSTATE)
5894 {
3280af22 5895 PL_curcop = ((COP*)o);
acb36ea4 5896 }
748a9306 5897 goto nothin;
79072805 5898 case OP_SCALAR:
93a17b20 5899 case OP_LINESEQ:
463ee0b2 5900 case OP_SCOPE:
748a9306 5901 nothin:
a0d0e21e
LW		 5902 if (oldop && o->op_next) {
5903 oldop->op_next = o->op_next;
79072805
LW		 5904 continue;
5905 }
3280af22 5906 o->op_seq = PL_op_seqmax++;
79072805
LW		 5907 break;
5908
5909 case OP_GV:
a0d0e21e 5910 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5911 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5912 null(o->op_next);
5913 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5914 o->op_next = o->op_next->op_next;
5915 o->op_type = OP_GVSV;
22c35a8c 5916 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 5917 }
5918 }
a0d0e21e
LW		 5919 else if (o->op_next->op_type == OP_RV2AV) {
5920 OP* pop = o->op_next->op_next;
5921 IV i;
8990e307 5922 if (pop->op_type == OP_CONST &&
533c011a 5923 (PL_op = pop->op_next) &&
8990e307 5924 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5925 !(pop->op_next->op_private &
68dc0745 5926 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5927 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5928 <= 255 &&
8990e307
LW		 5929 i >= 0)
5930 {
a0d0e21e 5931 null(o->op_next);
8990e307
LW		 5932 null(pop->op_next);
5933 null(pop);
a0d0e21e
LW		 5934 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5935 o->op_next = pop->op_next->op_next;
5936 o->op_type = OP_AELEMFAST;
22c35a8c 5937 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 5938 o->op_private = (U8)i;
a6006777 5939 GvAVn(((GVOP*)o)->op_gv);
8990e307 5940 }
79072805 5941 }
76cd736e
GS		 5942 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
5943 GV *gv = cGVOPo->op_gv;
5944 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
5945 /* XXX could check prototype here instead of just carping */
5946 SV *sv = sv_newmortal();
5947 gv_efullname3(sv, gv, Nullch);
5948 Perl_warner(aTHX_ WARN_UNSAFE,
5949 "%s() called too early to check prototype",
5950 SvPV_nolen(sv));
5951 }
5952 }
5953
3280af22 5954 o->op_seq = PL_op_seqmax++;
79072805
LW		 5955 break;
5956
a0d0e21e 5957 case OP_MAPWHILE:
79072805
LW		 5958 case OP_GREPWHILE:
5959 case OP_AND:
5960 case OP_OR:
2c2d71f5
JH		 5961 case OP_ANDASSIGN:
5962 case OP_ORASSIGN:
1a67a97c
SM		 5963 case OP_COND_EXPR:
5964 case OP_RANGE:
3280af22 5965 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5966 while (cLOGOP->op_other->op_type == OP_NULL)
5967 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5968 peep(cLOGOP->op_other);
5969 break;
5970
79072805 5971 case OP_ENTERLOOP:
3280af22 5972 o->op_seq = PL_op_seqmax++;
79072805
LW		 5973 peep(cLOOP->op_redoop);
5974 peep(cLOOP->op_nextop);
5975 peep(cLOOP->op_lastop);
5976 break;
5977
8782bef2 5978 case OP_QR:
79072805
LW		 5979 case OP_MATCH:
5980 case OP_SUBST:
3280af22 5981 o->op_seq = PL_op_seqmax++;
a0d0e21e 5982 peep(cPMOP->op_pmreplstart);
79072805
LW		 5983 break;
5984
a0d0e21e 5985 case OP_EXEC:
3280af22 5986 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5987 if (ckWARN(WARN_SYNTAX) && o->op_next
5988 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5989 if (o->op_next->op_sibling &&
20408e3c
GS		 5990 o->op_next->op_sibling->op_type != OP_EXIT &&
5991 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5992 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5993 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5994
3280af22 5995 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
cea2e8a9
GS		 5996 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
5997 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5998 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5999 }
6000 }
6001 break;
aeea060c 6002
c750a3ec
MB		 6003 case OP_HELEM: {
6004 UNOP *rop;
6005 SV *lexname;
6006 GV **fields;
6007 SV **svp, **indsvp;
6008 I32 ind;
6009 char *key;
6010 STRLEN keylen;
aeea060c 6011
377b21bb 6012 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6013 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6014 break;
6015 rop = (UNOP*)((BINOP*)o)->op_first;
6016 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6017 break;
3280af22 6018 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6019 if (!SvOBJECT(lexname))
6020 break;
5196be3e 6021 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6022 if (!fields || !GvHV(*fields))
6023 break;
6024 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
6025 key = SvPV(*svp, keylen);
6026 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6027 if (!indsvp) {
cea2e8a9 6028 Perl_croak(aTHX_ "No such field \"%s\" in variable %s of type %s",
2d8e6c8d 6029 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6030 }
6031 ind = SvIV(*indsvp);
6032 if (ind < 1)
cea2e8a9 6033 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6034 rop->op_type = OP_RV2AV;
22c35a8c 6035 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6036 o->op_type = OP_AELEM;
22c35a8c 6037 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6038 SvREFCNT_dec(*svp);
6039 *svp = newSViv(ind);
6040 break;
6041 }
6042
79072805 6043 default:
3280af22 6044 o->op_seq = PL_op_seqmax++;
79072805
LW		 6045 break;
6046 }
a0d0e21e 6047 oldop = o;
79072805 6048 }
a0d0e21e 6049 LEAVE;
79072805 6050}
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