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another optimized-OP_SASSIGN bug: ops that were not OA_TARGLEX
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e 24
b7dc083c
NIS		 25#ifdef PL_OP_SLAB_ALLOC
26#define SLAB_SIZE 8192
27static char *PL_OpPtr = NULL;
28static int PL_OpSpace = 0;
29#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
30 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
31 else \
32 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
33 } while (0)
34
864dbfa3 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 37{
38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
b7dc083c
NIS		 43#else
44#define NewOp(m, var, c, type) Newz(m, var, c, type)
45#endif
e50aee73 46/*
5dc0d613 47 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 48 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 49 */
11343788 50#define CHECKOP(type,o) \
3280af22 51 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 52 ? ( op_free((OP*)o), \
cea2e8a9 53 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 54 Nullop ) \
fc0dc3b3 55 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 56
c53d7c7d
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
33633739
GS		 153 "\"%s\" variable %s masks earlier declaration in same %s",
154 (PL_in_my == KEY_our ? "our" : "my"),
155 name,
156 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
157 --off;
158 break;
159 }
160 }
161 if (PL_in_my == KEY_our) {
1127039a 162 while (off <= top) {
33633739
GS		 163 if ((sv = svp[off])
164 && sv != &PL_sv_undef
165 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
166 && strEQ(name, SvPVX(sv)))
f472eb5c 167 {
e476b1b5 168 Perl_warner(aTHX_ WARN_MISC,
33633739 169 "\"our\" variable %s redeclared", name);
e476b1b5 170 Perl_warner(aTHX_ WARN_MISC,
33633739
GS		 171 "(Did you mean \"local\" instead of \"our\"?)\n");
172 break;
f472eb5c 173 }
33633739 174 --off;
b1cb66bf 175 }
176 }
177 }
a0d0e21e
LW		 178 off = pad_alloc(OP_PADSV, SVs_PADMY);
179 sv = NEWSV(1102,0);
93a17b20
LW		 180 sv_upgrade(sv, SVt_PVNV);
181 sv_setpv(sv, name);
3280af22 182 if (PL_in_my_stash) {
c750a3ec 183 if (*name != '$')
eb64745e
GS		 184 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
185 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 186 SvOBJECT_on(sv);
187 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 188 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
189 PL_sv_objcount++;
c750a3ec 190 }
f472eb5c
GS		 191 if (PL_in_my == KEY_our) {
192 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 193 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 194 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 195 }
3280af22 196 av_store(PL_comppad_name, off, sv);
65202027 197 SvNVX(sv) = (NV)PAD_MAX;
8990e307 198 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 199 if (!PL_min_intro_pending)
200 PL_min_intro_pending = off;
201 PL_max_intro_pending = off;
93a17b20 202 if (*name == '@')
3280af22 203 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 204 else if (*name == '%')
3280af22
NIS		 205 av_store(PL_comppad, off, (SV*)newHV());
206 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 207 return off;
208}
209
94f23f41
GS		 210STATIC PADOFFSET
211S_pad_addlex(pTHX_ SV *proto_namesv)
212{
213 SV *namesv = NEWSV(1103,0);
214 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
215 sv_upgrade(namesv, SVt_PVNV);
216 sv_setpv(namesv, SvPVX(proto_namesv));
217 av_store(PL_comppad_name, newoff, namesv);
218 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
219 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
220 SvFAKE_on(namesv); /* A ref, not a real var */
221 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
222 SvFLAGS(namesv) |= SVpad_OUR;
223 (void)SvUPGRADE(namesv, SVt_PVGV);
224 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
225 }
226 if (SvOBJECT(proto_namesv)) { /* A typed var */
227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
230 PL_sv_objcount++;
231 }
232 return newoff;
233}
234
2680586e
GS		 235#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
236
76e3520e 237STATIC PADOFFSET
cea2e8a9 238S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 239 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 240{
11343788 241 dTHR;
748a9306 242 CV *cv;
93a17b20
LW		 243 I32 off;
244 SV *sv;
93a17b20 245 register I32 i;
c09156bb 246 register PERL_CONTEXT *cx;
93a17b20 247
748a9306 248 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 249 AV *curlist = CvPADLIST(cv);
250 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 251 AV *curname;
4fdae800 252
3280af22 253 if (!svp || *svp == &PL_sv_undef)
4633a7c4 254 continue;
748a9306
LW		 255 curname = (AV*)*svp;
256 svp = AvARRAY(curname);
93965878 257 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 258 if ((sv = svp[off]) &&
3280af22 259 sv != &PL_sv_undef &&
748a9306 260 seq <= SvIVX(sv) &&
13826f2c 261 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 262 strEQ(SvPVX(sv), name))
263 {
5f05dabc 264 I32 depth;
265 AV *oldpad;
266 SV *oldsv;
267
268 depth = CvDEPTH(cv);
269 if (!depth) {
9607fc9c 270 if (newoff) {
271 if (SvFAKE(sv))
272 continue;
4fdae800 273 return 0; /* don't clone from inactive stack frame */
9607fc9c 274 }
5f05dabc 275 depth = 1;
276 }
94f23f41 277 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 278 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 279 if (!newoff) { /* Not a mere clone operation. */
94f23f41 280 newoff = pad_addlex(sv);
3280af22 281 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 282 /* "It's closures all the way down." */
3280af22 283 CvCLONE_on(PL_compcv);
54310121 284 if (cv == startcv) {
3280af22 285 if (CvANON(PL_compcv))
54310121 286 oldsv = Nullsv; /* no need to keep ref */
287 }
288 else {
28757baa 289 CV *bcv;
290 for (bcv = startcv;
291 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 292 bcv = CvOUTSIDE(bcv))
293 {
94f23f41
GS		 294 if (CvANON(bcv)) {
295 /* install the missing pad entry in intervening
296 * nested subs and mark them cloneable.
297 * XXX fix pad_foo() to not use globals */
298 AV *ocomppad_name = PL_comppad_name;
299 AV *ocomppad = PL_comppad;
300 SV **ocurpad = PL_curpad;
301 AV *padlist = CvPADLIST(bcv);
302 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
303 PL_comppad = (AV*)AvARRAY(padlist)[1];
304 PL_curpad = AvARRAY(PL_comppad);
305 pad_addlex(sv);
306 PL_comppad_name = ocomppad_name;
307 PL_comppad = ocomppad;
308 PL_curpad = ocurpad;
28757baa 309 CvCLONE_on(bcv);
94f23f41 310 }
28757baa 311 else {
6b35e009
GS		 312 if (ckWARN(WARN_CLOSURE)
313 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
314 {
cea2e8a9 315 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 316 "Variable \"%s\" may be unavailable",
28757baa 317 name);
6b35e009 318 }
28757baa 319 break;
320 }
321 }
322 }
323 }
3280af22 324 else if (!CvUNIQUE(PL_compcv)) {
599cee73 325 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 326 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 327 "Variable \"%s\" will not stay shared", name);
5f05dabc 328 }
748a9306 329 }
3280af22 330 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 331 return newoff;
332 }
93a17b20
LW		 333 }
334 }
335
2680586e
GS		 336 if (flags & FINDLEX_NOSEARCH)
337 return 0;
338
93a17b20
LW		 339 /* Nothing in current lexical context--try eval's context, if any.
340 * This is necessary to let the perldb get at lexically scoped variables.
341 * XXX This will also probably interact badly with eval tree caching.
342 */
343
748a9306 344 for (i = cx_ix; i >= 0; i--) {
93a17b20 345 cx = &cxstack[i];
6b35e009 346 switch (CxTYPE(cx)) {
93a17b20 347 default:
748a9306
LW		 348 if (i == 0 && saweval) {
349 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 350 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 351 }
93a17b20
LW		 352 break;
353 case CXt_EVAL:
44a8e56a 354 switch (cx->blk_eval.old_op_type) {
355 case OP_ENTEREVAL:
6b35e009
GS		 356 if (CxREALEVAL(cx))
357 saweval = i;
44a8e56a 358 break;
faa7e5bb 359 case OP_DOFILE:
44a8e56a 360 case OP_REQUIRE:
faa7e5bb 361 /* require/do must have their own scope */
44a8e56a 362 return 0;
363 }
93a17b20 364 break;
7766f137 365 case CXt_FORMAT:
93a17b20
LW		 366 case CXt_SUB:
367 if (!saweval)
368 return 0;
369 cv = cx->blk_sub.cv;
3280af22 370 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 371 saweval = i; /* so we know where we were called from */
93a17b20 372 continue;
93a17b20 373 }
748a9306 374 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 375 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 376 }
377 }
378
748a9306
LW		 379 return 0;
380}
a0d0e21e 381
748a9306 382PADOFFSET
864dbfa3 383Perl_pad_findmy(pTHX_ char *name)
748a9306 384{
11343788 385 dTHR;
748a9306 386 I32 off;
54310121 387 I32 pendoff = 0;
748a9306 388 SV *sv;
3280af22
NIS		 389 SV **svp = AvARRAY(PL_comppad_name);
390 U32 seq = PL_cop_seqmax;
6b35e009 391 PERL_CONTEXT *cx;
33b8ce05 392 CV *outside;
748a9306 393
11343788
MB		 394#ifdef USE_THREADS
395 /*
396 * Special case to get lexical (and hence per-thread) @_.
397 * XXX I need to find out how to tell at parse-time whether use
398 * of @_ should refer to a lexical (from a sub) or defgv (global
399 * scope and maybe weird sub-ish things like formats). See
400 * startsub in perly.y. It's possible that @_ could be lexical
401 * (at least from subs) even in non-threaded perl.
402 */
403 if (strEQ(name, "@_"))
404 return 0; /* success. (NOT_IN_PAD indicates failure) */
405#endif /* USE_THREADS */
406
748a9306 407 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 408 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 409 if ((sv = svp[off]) &&
3280af22 410 sv != &PL_sv_undef &&
54310121 411 (!SvIVX(sv) ||
412 (seq <= SvIVX(sv) &&
413 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 414 strEQ(SvPVX(sv), name))
415 {
77ca0c92 416 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 417 return (PADOFFSET)off;
418 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 419 }
420 }
748a9306 421
33b8ce05
GS		 422 outside = CvOUTSIDE(PL_compcv);
423
424 /* Check if if we're compiling an eval'', and adjust seq to be the
425 * eval's seq number. This depends on eval'' having a non-null
426 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 427 * identified by CvEVAL being true and CvGV being null. */
428 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 429 cx = &cxstack[cxstack_ix];
430 if (CxREALEVAL(cx))
431 seq = cx->blk_oldcop->cop_seq;
432 }
433
748a9306 434 /* See if it's in a nested scope */
2680586e 435 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 436 if (off) {
437 /* If there is a pending local definition, this new alias must die */
438 if (pendoff)
3280af22 439 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 440 return off; /* pad_findlex returns 0 for failure...*/
54310121 441 }
11343788 442 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 443}
444
445void
864dbfa3 446Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 447{
0453d815 448 dTHR;
93a17b20 449 I32 off;
3280af22 450 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 451 SV *sv;
3280af22
NIS		 452 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
453 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 454 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
455 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 456 }
457 }
458 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 459 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 460 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 461 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 462 }
463}
464
465PADOFFSET
864dbfa3 466Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 467{
11343788 468 dTHR;
79072805
LW		 469 SV *sv;
470 I32 retval;
471
3280af22 472 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 473 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 474 if (PL_pad_reset_pending)
a0d0e21e 475 pad_reset();
ed6116ce 476 if (tmptype & SVs_PADMY) {
79072805 477 do {
3280af22 478 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 479 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 480 retval = AvFILLp(PL_comppad);
79072805
LW		 481 }
482 else {
3280af22
NIS		 483 SV **names = AvARRAY(PL_comppad_name);
484 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 485 for (;;) {
486 /*
487 * "foreach" index vars temporarily become aliases to non-"my"
488 * values. Thus we must skip, not just pad values that are
489 * marked as current pad values, but also those with names.
490 */
3280af22
NIS		 491 if (++PL_padix <= names_fill &&
492 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 493 continue;
3280af22 494 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 495 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 496 break;
497 }
3280af22 498 retval = PL_padix;
79072805 499 }
8990e307 500 SvFLAGS(sv) |= tmptype;
3280af22 501 PL_curpad = AvARRAY(PL_comppad);
11343788 502#ifdef USE_THREADS
b900a521
JH		 503 DEBUG_X(PerlIO_printf(Perl_debug_log,
504 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
505 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 506 (long) retval, PL_op_name[optype]));
11343788 507#else
b900a521
JH		 508 DEBUG_X(PerlIO_printf(Perl_debug_log,
509 "Pad 0x%"UVxf" alloc %ld for %s\n",
510 PTR2UV(PL_curpad),
22c35a8c 511 (long) retval, PL_op_name[optype]));
11343788 512#endif /* USE_THREADS */
79072805
LW		 513 return (PADOFFSET)retval;
514}
515
516SV *
864dbfa3 517Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 518{
11343788
MB		 519 dTHR;
520#ifdef USE_THREADS
b900a521 521 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 522 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
523 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 524#else
79072805 525 if (!po)
cea2e8a9 526 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 527 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
528 PTR2UV(PL_curpad), (IV)po));
11343788 529#endif /* USE_THREADS */
3280af22 530 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 531}
532
533void
864dbfa3 534Perl_pad_free(pTHX_ PADOFFSET po)
79072805 535{
11343788 536 dTHR;
3280af22 537 if (!PL_curpad)
a0d0e21e 538 return;
3280af22 539 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 540 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 541 if (!po)
cea2e8a9 542 Perl_croak(aTHX_ "panic: pad_free po");
11343788 543#ifdef USE_THREADS
b900a521 544 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 545 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 546 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 547#else
97835f67
JH		 548 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
549 PTR2UV(PL_curpad), (IV)po));
11343788 550#endif /* USE_THREADS */
2aa1bedc 551 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 552 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 553#ifdef USE_ITHREADS
554 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
555#endif
556 }
3280af22
NIS		 557 if ((I32)po < PL_padix)
558 PL_padix = po - 1;
79072805
LW		 559}
560
561void
864dbfa3 562Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 563{
11343788 564 dTHR;
3280af22 565 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 566 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 567 if (!po)
cea2e8a9 568 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 569#ifdef USE_THREADS
b900a521 570 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 571 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
572 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 573#else
97835f67
JH		 574 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
575 PTR2UV(PL_curpad), (IV)po));
11343788 576#endif /* USE_THREADS */
3280af22
NIS		 577 SvPADTMP_off(PL_curpad[po]);
578 PL_curpad[po] = NEWSV(1107,0);
579 SvPADTMP_on(PL_curpad[po]);
580 if ((I32)po < PL_padix)
581 PL_padix = po - 1;
79072805
LW		 582}
583
d9bb4600
GS		 584/* XXX pad_reset() is currently disabled because it results in serious bugs.
585 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
586 * on the stack by OPs that use them, there are several ways to get an alias
587 * to a shared TARG. Such an alias will change randomly and unpredictably.
588 * We avoid doing this until we can think of a Better Way.
589 * GSAR 97-10-29 */
79072805 590void
864dbfa3 591Perl_pad_reset(pTHX)
79072805 592{
d9bb4600 593#ifdef USE_BROKEN_PAD_RESET
11343788 594 dTHR;
79072805
LW		 595 register I32 po;
596
6b88bc9c 597 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 598 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 599#ifdef USE_THREADS
b900a521
JH		 600 DEBUG_X(PerlIO_printf(Perl_debug_log,
601 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
602 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 603#else
b900a521
JH		 604 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
605 PTR2UV(PL_curpad)));
11343788 606#endif /* USE_THREADS */
6b88bc9c
GS		 607 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
608 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
609 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
610 SvPADTMP_off(PL_curpad[po]);
748a9306 611 }
6b88bc9c 612 PL_padix = PL_padix_floor;
79072805 613 }
d9bb4600 614#endif
3280af22 615 PL_pad_reset_pending = FALSE;
79072805
LW		 616}
617
a863c7d1 618#ifdef USE_THREADS
54b9620d 619/* find_threadsv is not reentrant */
a863c7d1 620PADOFFSET
864dbfa3 621Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 622{
623 dTHR;
624 char *p;
625 PADOFFSET key;
554b3eca 626 SV **svp;
54b9620d 627 /* We currently only handle names of a single character */
533c011a 628 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 629 if (!p)
630 return NOT_IN_PAD;
533c011a 631 key = p - PL_threadsv_names;
2d8e6c8d 632 MUTEX_LOCK(&thr->mutex);
54b9620d 633 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 634 if (svp)
635 MUTEX_UNLOCK(&thr->mutex);
636 else {
554b3eca 637 SV *sv = NEWSV(0, 0);
54b9620d 638 av_store(thr->threadsv, key, sv);
940cb80d 639 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 640 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 641 /*
642 * Some magic variables used to be automagically initialised
643 * in gv_fetchpv. Those which are now per-thread magicals get
644 * initialised here instead.
645 */
646 switch (*name) {
54b9620d
MB		 647 case '_':
648 break;
554b3eca
MB		 649 case ';':
650 sv_setpv(sv, "\034");
54b9620d 651 sv_magic(sv, 0, 0, name, 1);
554b3eca 652 break;
c277df42
IZ		 653 case '&':
654 case '`':
655 case '\'':
533c011a 656 PL_sawampersand = TRUE;
a3f914c5
GS		 657 /* FALL THROUGH */
658 case '1':
659 case '2':
660 case '3':
661 case '4':
662 case '5':
663 case '6':
664 case '7':
665 case '8':
666 case '9':
c277df42 667 SvREADONLY_on(sv);
d8b5173a 668 /* FALL THROUGH */
067391ea
GS		 669
670 /* XXX %! tied to Errno.pm needs to be added here.
671 * See gv_fetchpv(). */
672 /* case '!': */
673
54b9620d
MB		 674 default:
675 sv_magic(sv, 0, 0, name, 1);
554b3eca 676 }
bf49b057 677 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 678 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 679 sv, (*name < 32) ? "^" : "",
680 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 681 }
682 return key;
683}
684#endif /* USE_THREADS */
685
79072805
LW		 686/* Destructor */
687
688void
864dbfa3 689Perl_op_free(pTHX_ OP *o)
79072805 690{
85e6fe83 691 register OP *kid, *nextkid;
acb36ea4 692 OPCODE type;
79072805 693
5dc0d613 694 if (!o || o->op_seq == (U16)-1)
79072805
LW		 695 return;
696
7934575e
GS		 697 if (o->op_private & OPpREFCOUNTED) {
698 switch (o->op_type) {
699 case OP_LEAVESUB:
700 case OP_LEAVESUBLV:
701 case OP_LEAVEEVAL:
702 case OP_LEAVE:
703 case OP_SCOPE:
704 case OP_LEAVEWRITE:
705 OP_REFCNT_LOCK;
706 if (OpREFCNT_dec(o)) {
707 OP_REFCNT_UNLOCK;
708 return;
709 }
710 OP_REFCNT_UNLOCK;
711 break;
712 default:
713 break;
714 }
715 }
716
11343788
MB		 717 if (o->op_flags & OPf_KIDS) {
718 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 719 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 720 op_free(kid);
85e6fe83 721 }
79072805 722 }
acb36ea4
GS		 723 type = o->op_type;
724 if (type == OP_NULL)
725 type = o->op_targ;
726
727 /* COP* is not cleared by op_clear() so that we may track line
728 * numbers etc even after null() */
729 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
730 cop_free((COP*)o);
731
732 op_clear(o);
733
734#ifdef PL_OP_SLAB_ALLOC
735 if ((char *) o == PL_OpPtr)
736 {
737 }
738#else
739 Safefree(o);
740#endif
741}
79072805 742
acb36ea4
GS		 743STATIC void
744S_op_clear(pTHX_ OP *o)
745{
11343788 746 switch (o->op_type) {
acb36ea4
GS		 747 case OP_NULL: /* Was holding old type, if any. */
748 case OP_ENTEREVAL: /* Was holding hints. */
749#ifdef USE_THREADS
750 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
751#endif
752 o->op_targ = 0;
a0d0e21e 753 break;
554b3eca 754#ifdef USE_THREADS
8dd3ba40
SM		 755 case OP_ENTERITER:
756 if (!(o->op_flags & OPf_SPECIAL))
757 break;
758 /* FALL THROUGH */
554b3eca 759#endif /* USE_THREADS */
a6006777 760 default:
ac4c12e7 761 if (!(o->op_flags & OPf_REF)
0b94c7bb 762 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 763 break;
764 /* FALL THROUGH */
463ee0b2 765 case OP_GVSV:
79072805 766 case OP_GV:
a6006777 767 case OP_AELEMFAST:
350de78d 768#ifdef USE_ITHREADS
971a9dd3
GS		 769 if (cPADOPo->op_padix > 0) {
770 if (PL_curpad) {
638eceb6 771 GV *gv = cGVOPo_gv;
971a9dd3
GS		 772 pad_swipe(cPADOPo->op_padix);
773 /* No GvIN_PAD_off(gv) here, because other references may still
774 * exist on the pad */
775 SvREFCNT_dec(gv);
776 }
777 cPADOPo->op_padix = 0;
778 }
350de78d 779#else
971a9dd3 780 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 781 cSVOPo->op_sv = Nullsv;
350de78d 782#endif
79072805
LW		 783 break;
784 case OP_CONST:
11343788 785 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 786 cSVOPo->op_sv = Nullsv;
79072805 787 break;
748a9306
LW		 788 case OP_GOTO:
789 case OP_NEXT:
790 case OP_LAST:
791 case OP_REDO:
11343788 792 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 793 break;
794 /* FALL THROUGH */
a0d0e21e 795 case OP_TRANS:
acb36ea4 796 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 797 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 798 cSVOPo->op_sv = Nullsv;
799 }
800 else {
a0ed51b3 801 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 802 cPVOPo->op_pv = Nullch;
803 }
a0d0e21e
LW		 804 break;
805 case OP_SUBST:
11343788 806 op_free(cPMOPo->op_pmreplroot);
971a9dd3 807 goto clear_pmop;
748a9306 808 case OP_PUSHRE:
971a9dd3
GS		 809#ifdef USE_ITHREADS
810 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
811 if (PL_curpad) {
812 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
813 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
814 /* No GvIN_PAD_off(gv) here, because other references may still
815 * exist on the pad */
816 SvREFCNT_dec(gv);
817 }
818 }
819#else
820 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
821#endif
822 /* FALL THROUGH */
a0d0e21e 823 case OP_MATCH:
8782bef2 824 case OP_QR:
971a9dd3
GS		 825clear_pmop:
826 cPMOPo->op_pmreplroot = Nullop;
c277df42 827 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 828 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 829 break;
79072805
LW		 830 }
831
743e66e6 832 if (o->op_targ > 0) {
11343788 833 pad_free(o->op_targ);
743e66e6
GS		 834 o->op_targ = 0;
835 }
79072805
LW		 836}
837
76e3520e 838STATIC void
3eb57f73
HS		 839S_cop_free(pTHX_ COP* cop)
840{
841 Safefree(cop->cop_label);
57843af0
GS		 842#ifdef USE_ITHREADS
843 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 844 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 845#else
11faa288 846 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 847 SvREFCNT_dec(CopFILEGV(cop));
57843af0 848#endif
0453d815 849 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 850 SvREFCNT_dec(cop->cop_warnings);
851}
852
853STATIC void
cea2e8a9 854S_null(pTHX_ OP *o)
8990e307 855{
acb36ea4
GS		 856 if (o->op_type == OP_NULL)
857 return;
858 op_clear(o);
11343788
MB		 859 o->op_targ = o->op_type;
860 o->op_type = OP_NULL;
22c35a8c 861 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 862}
863
79072805
LW		 864/* Contextualizers */
865
463ee0b2 866#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 867
868OP *
864dbfa3 869Perl_linklist(pTHX_ OP *o)
79072805
LW		 870{
871 register OP *kid;
872
11343788
MB		 873 if (o->op_next)
874 return o->op_next;
79072805
LW		 875
876 /* establish postfix order */
11343788
MB		 877 if (cUNOPo->op_first) {
878 o->op_next = LINKLIST(cUNOPo->op_first);
879 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 880 if (kid->op_sibling)
881 kid->op_next = LINKLIST(kid->op_sibling);
882 else
11343788 883 kid->op_next = o;
79072805
LW		 884 }
885 }
886 else
11343788 887 o->op_next = o;
79072805 888
11343788 889 return o->op_next;
79072805
LW		 890}
891
892OP *
864dbfa3 893Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 894{
895 OP *kid;
11343788
MB		 896 if (o && o->op_flags & OPf_KIDS) {
897 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 898 scalar(kid);
899 }
11343788 900 return o;
79072805
LW		 901}
902
76e3520e 903STATIC OP *
cea2e8a9 904S_scalarboolean(pTHX_ OP *o)
8990e307 905{
d008e5eb 906 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 907 dTHR;
d008e5eb 908 if (ckWARN(WARN_SYNTAX)) {
57843af0 909 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 910
d008e5eb 911 if (PL_copline != NOLINE)
57843af0 912 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 913 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 914 CopLINE_set(PL_curcop, oldline);
d008e5eb 915 }
a0d0e21e 916 }
11343788 917 return scalar(o);
8990e307
LW		 918}
919
920OP *
864dbfa3 921Perl_scalar(pTHX_ OP *o)
79072805
LW		 922{
923 OP *kid;
924
a0d0e21e 925 /* assumes no premature commitment */
3280af22 926 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 927 || o->op_type == OP_RETURN)
7e363e51 928 {
11343788 929 return o;
7e363e51 930 }
79072805 931
5dc0d613 932 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 933
11343788 934 switch (o->op_type) {
79072805 935 case OP_REPEAT:
11343788
MB		 936 if (o->op_private & OPpREPEAT_DOLIST)
937 null(((LISTOP*)cBINOPo->op_first)->op_first);
938 scalar(cBINOPo->op_first);
8990e307 939 break;
79072805
LW		 940 case OP_OR:
941 case OP_AND:
942 case OP_COND_EXPR:
11343788 943 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 944 scalar(kid);
79072805 945 break;
a0d0e21e 946 case OP_SPLIT:
11343788 947 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 948 if (!kPMOP->op_pmreplroot)
949 deprecate("implicit split to @_");
950 }
951 /* FALL THROUGH */
79072805 952 case OP_MATCH:
8782bef2 953 case OP_QR:
79072805
LW		 954 case OP_SUBST:
955 case OP_NULL:
8990e307 956 default:
11343788
MB		 957 if (o->op_flags & OPf_KIDS) {
958 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 959 scalar(kid);
960 }
79072805
LW		 961 break;
962 case OP_LEAVE:
963 case OP_LEAVETRY:
5dc0d613 964 kid = cLISTOPo->op_first;
54310121 965 scalar(kid);
155aba94 966 while ((kid = kid->op_sibling)) {
54310121 967 if (kid->op_sibling)
968 scalarvoid(kid);
969 else
970 scalar(kid);
971 }
3280af22 972 WITH_THR(PL_curcop = &PL_compiling);
54310121 973 break;
748a9306 974 case OP_SCOPE:
79072805 975 case OP_LINESEQ:
8990e307 976 case OP_LIST:
11343788 977 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 978 if (kid->op_sibling)
979 scalarvoid(kid);
980 else
981 scalar(kid);
982 }
3280af22 983 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 984 break;
985 }
11343788 986 return o;
79072805
LW		 987}
988
989OP *
864dbfa3 990Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 991{
992 OP *kid;
8990e307
LW		 993 char* useless = 0;
994 SV* sv;
2ebea0a1
GS		 995 U8 want;
996
acb36ea4
GS		 997 if (o->op_type == OP_NEXTSTATE
998 || o->op_type == OP_SETSTATE
999 || o->op_type == OP_DBSTATE
1000 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1001 || o->op_targ == OP_SETSTATE
1002 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1003 {
1004 dTHR;
1005 PL_curcop = (COP*)o; /* for warning below */
1006 }
79072805 1007
54310121 1008 /* assumes no premature commitment */
2ebea0a1
GS		 1009 want = o->op_flags & OPf_WANT;
1010 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1011 || o->op_type == OP_RETURN)
7e363e51 1012 {
11343788 1013 return o;
7e363e51 1014 }
79072805 1015
b162f9ea 1016 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1017 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1018 {
b162f9ea 1019 return scalar(o); /* As if inside SASSIGN */
7e363e51 1020 }
b162f9ea 1021
5dc0d613 1022 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1023
11343788 1024 switch (o->op_type) {
79072805 1025 default:
22c35a8c 1026 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1027 break;
36477c24 1028 /* FALL THROUGH */
1029 case OP_REPEAT:
11343788 1030 if (o->op_flags & OPf_STACKED)
8990e307 1031 break;
5d82c453
GA		 1032 goto func_ops;
1033 case OP_SUBSTR:
1034 if (o->op_private == 4)
1035 break;
8990e307
LW		 1036 /* FALL THROUGH */
1037 case OP_GVSV:
1038 case OP_WANTARRAY:
1039 case OP_GV:
1040 case OP_PADSV:
1041 case OP_PADAV:
1042 case OP_PADHV:
1043 case OP_PADANY:
1044 case OP_AV2ARYLEN:
8990e307 1045 case OP_REF:
a0d0e21e
LW		 1046 case OP_REFGEN:
1047 case OP_SREFGEN:
8990e307
LW		 1048 case OP_DEFINED:
1049 case OP_HEX:
1050 case OP_OCT:
1051 case OP_LENGTH:
8990e307
LW		 1052 case OP_VEC:
1053 case OP_INDEX:
1054 case OP_RINDEX:
1055 case OP_SPRINTF:
1056 case OP_AELEM:
1057 case OP_AELEMFAST:
1058 case OP_ASLICE:
8990e307
LW		 1059 case OP_HELEM:
1060 case OP_HSLICE:
1061 case OP_UNPACK:
1062 case OP_PACK:
8990e307
LW		 1063 case OP_JOIN:
1064 case OP_LSLICE:
1065 case OP_ANONLIST:
1066 case OP_ANONHASH:
1067 case OP_SORT:
1068 case OP_REVERSE:
1069 case OP_RANGE:
1070 case OP_FLIP:
1071 case OP_FLOP:
1072 case OP_CALLER:
1073 case OP_FILENO:
1074 case OP_EOF:
1075 case OP_TELL:
1076 case OP_GETSOCKNAME:
1077 case OP_GETPEERNAME:
1078 case OP_READLINK:
1079 case OP_TELLDIR:
1080 case OP_GETPPID:
1081 case OP_GETPGRP:
1082 case OP_GETPRIORITY:
1083 case OP_TIME:
1084 case OP_TMS:
1085 case OP_LOCALTIME:
1086 case OP_GMTIME:
1087 case OP_GHBYNAME:
1088 case OP_GHBYADDR:
1089 case OP_GHOSTENT:
1090 case OP_GNBYNAME:
1091 case OP_GNBYADDR:
1092 case OP_GNETENT:
1093 case OP_GPBYNAME:
1094 case OP_GPBYNUMBER:
1095 case OP_GPROTOENT:
1096 case OP_GSBYNAME:
1097 case OP_GSBYPORT:
1098 case OP_GSERVENT:
1099 case OP_GPWNAM:
1100 case OP_GPWUID:
1101 case OP_GGRNAM:
1102 case OP_GGRGID:
1103 case OP_GETLOGIN:
5d82c453 1104 func_ops:
64aac5a9 1105 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1106 useless = PL_op_desc[o->op_type];
8990e307
LW		 1107 break;
1108
1109 case OP_RV2GV:
1110 case OP_RV2SV:
1111 case OP_RV2AV:
1112 case OP_RV2HV:
192587c2 1113 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1114 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1115 useless = "a variable";
1116 break;
79072805
LW		 1117
1118 case OP_CONST:
7766f137 1119 sv = cSVOPo_sv;
7a52d87a
GS		 1120 if (cSVOPo->op_private & OPpCONST_STRICT)
1121 no_bareword_allowed(o);
1122 else {
d008e5eb
GS		 1123 dTHR;
1124 if (ckWARN(WARN_VOID)) {
1125 useless = "a constant";
1126 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1127 useless = 0;
1128 else if (SvPOK(sv)) {
1129 if (strnEQ(SvPVX(sv), "di", 2) ||
1130 strnEQ(SvPVX(sv), "ds", 2) ||
1131 strnEQ(SvPVX(sv), "ig", 2))
1132 useless = 0;
1133 }
8990e307
LW		 1134 }
1135 }
acb36ea4 1136 null(o); /* don't execute or even remember it */
79072805
LW		 1137 break;
1138
1139 case OP_POSTINC:
11343788 1140 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1141 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1142 break;
1143
1144 case OP_POSTDEC:
11343788 1145 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1146 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1147 break;
1148
79072805
LW		 1149 case OP_OR:
1150 case OP_AND:
1151 case OP_COND_EXPR:
11343788 1152 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1153 scalarvoid(kid);
1154 break;
5aabfad6 1155
a0d0e21e 1156 case OP_NULL:
11343788 1157 if (o->op_flags & OPf_STACKED)
a0d0e21e 1158 break;
5aabfad6 1159 /* FALL THROUGH */
2ebea0a1
GS		 1160 case OP_NEXTSTATE:
1161 case OP_DBSTATE:
79072805
LW		 1162 case OP_ENTERTRY:
1163 case OP_ENTER:
1164 case OP_SCALAR:
11343788 1165 if (!(o->op_flags & OPf_KIDS))
79072805 1166 break;
54310121 1167 /* FALL THROUGH */
463ee0b2 1168 case OP_SCOPE:
79072805
LW		 1169 case OP_LEAVE:
1170 case OP_LEAVETRY:
a0d0e21e 1171 case OP_LEAVELOOP:
79072805 1172 case OP_LINESEQ:
79072805 1173 case OP_LIST:
11343788 1174 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1175 scalarvoid(kid);
1176 break;
c90c0ff4 1177 case OP_ENTEREVAL:
5196be3e 1178 scalarkids(o);
c90c0ff4 1179 break;
5aabfad6 1180 case OP_REQUIRE:
c90c0ff4 1181 /* all requires must return a boolean value */
5196be3e
MB		 1182 o->op_flags &= ~OPf_WANT;
1183 return scalar(o);
a0d0e21e 1184 case OP_SPLIT:
11343788 1185 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1186 if (!kPMOP->op_pmreplroot)
1187 deprecate("implicit split to @_");
1188 }
1189 break;
79072805 1190 }
d008e5eb
GS		 1191 if (useless) {
1192 dTHR;
1193 if (ckWARN(WARN_VOID))
cea2e8a9 1194 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1195 }
11343788 1196 return o;
79072805
LW		 1197}
1198
1199OP *
864dbfa3 1200Perl_listkids(pTHX_ OP *o)
79072805
LW		 1201{
1202 OP *kid;
11343788
MB		 1203 if (o && o->op_flags & OPf_KIDS) {
1204 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1205 list(kid);
1206 }
11343788 1207 return o;
79072805
LW		 1208}
1209
1210OP *
864dbfa3 1211Perl_list(pTHX_ OP *o)
79072805
LW		 1212{
1213 OP *kid;
1214
a0d0e21e 1215 /* assumes no premature commitment */
3280af22 1216 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1217 || o->op_type == OP_RETURN)
7e363e51 1218 {
11343788 1219 return o;
7e363e51 1220 }
79072805 1221
b162f9ea 1222 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1223 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1224 {
b162f9ea 1225 return o; /* As if inside SASSIGN */
7e363e51 1226 }
b162f9ea 1227
5dc0d613 1228 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1229
11343788 1230 switch (o->op_type) {
79072805
LW		 1231 case OP_FLOP:
1232 case OP_REPEAT:
11343788 1233 list(cBINOPo->op_first);
79072805
LW		 1234 break;
1235 case OP_OR:
1236 case OP_AND:
1237 case OP_COND_EXPR:
11343788 1238 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1239 list(kid);
1240 break;
1241 default:
1242 case OP_MATCH:
8782bef2 1243 case OP_QR:
79072805
LW		 1244 case OP_SUBST:
1245 case OP_NULL:
11343788 1246 if (!(o->op_flags & OPf_KIDS))
79072805 1247 break;
11343788
MB		 1248 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1249 list(cBINOPo->op_first);
1250 return gen_constant_list(o);
79072805
LW		 1251 }
1252 case OP_LIST:
11343788 1253 listkids(o);
79072805
LW		 1254 break;
1255 case OP_LEAVE:
1256 case OP_LEAVETRY:
5dc0d613 1257 kid = cLISTOPo->op_first;
54310121 1258 list(kid);
155aba94 1259 while ((kid = kid->op_sibling)) {
54310121 1260 if (kid->op_sibling)
1261 scalarvoid(kid);
1262 else
1263 list(kid);
1264 }
3280af22 1265 WITH_THR(PL_curcop = &PL_compiling);
54310121 1266 break;
748a9306 1267 case OP_SCOPE:
79072805 1268 case OP_LINESEQ:
11343788 1269 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1270 if (kid->op_sibling)
1271 scalarvoid(kid);
1272 else
1273 list(kid);
1274 }
3280af22 1275 WITH_THR(PL_curcop = &PL_compiling);
79072805 1276 break;
c90c0ff4 1277 case OP_REQUIRE:
1278 /* all requires must return a boolean value */
5196be3e
MB		 1279 o->op_flags &= ~OPf_WANT;
1280 return scalar(o);
79072805 1281 }
11343788 1282 return o;
79072805
LW		 1283}
1284
1285OP *
864dbfa3 1286Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1287{
1288 OP *kid;
1289
11343788
MB		 1290 if (o) {
1291 if (o->op_type == OP_LINESEQ ||
1292 o->op_type == OP_SCOPE ||
1293 o->op_type == OP_LEAVE ||
1294 o->op_type == OP_LEAVETRY)
463ee0b2 1295 {
0f15f207 1296 dTHR;
11343788 1297 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1298 if (kid->op_sibling) {
463ee0b2 1299 scalarvoid(kid);
ed6116ce 1300 }
463ee0b2 1301 }
3280af22 1302 PL_curcop = &PL_compiling;
79072805 1303 }
11343788 1304 o->op_flags &= ~OPf_PARENS;
3280af22 1305 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1306 o->op_flags |= OPf_PARENS;
79072805 1307 }
8990e307 1308 else
11343788
MB		 1309 o = newOP(OP_STUB, 0);
1310 return o;
79072805
LW		 1311}
1312
76e3520e 1313STATIC OP *
cea2e8a9 1314S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1315{
1316 OP *kid;
11343788
MB		 1317 if (o && o->op_flags & OPf_KIDS) {
1318 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1319 mod(kid, type);
79072805 1320 }
11343788 1321 return o;
79072805
LW		 1322}
1323
79072805 1324OP *
864dbfa3 1325Perl_mod(pTHX_ OP *o, I32 type)
79072805 1326{
11343788 1327 dTHR;
79072805 1328 OP *kid;
2d8e6c8d 1329 STRLEN n_a;
79072805 1330
3280af22 1331 if (!o || PL_error_count)
11343788 1332 return o;
79072805 1333
b162f9ea 1334 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1335 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1336 {
b162f9ea 1337 return o;
7e363e51 1338 }
b162f9ea 1339
11343788 1340 switch (o->op_type) {
68dc0745 1341 case OP_UNDEF:
3280af22 1342 PL_modcount++;
5dc0d613 1343 return o;
a0d0e21e 1344 case OP_CONST:
11343788 1345 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1346 goto nomod;
3280af22 1347 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1348 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1349 PL_eval_start = 0;
a0d0e21e
LW		 1350 }
1351 else if (!type) {
3280af22
NIS		 1352 SAVEI32(PL_compiling.cop_arybase);
1353 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1354 }
1355 else if (type == OP_REFGEN)
1356 goto nomod;
1357 else
cea2e8a9 1358 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1359 break;
5f05dabc 1360 case OP_STUB:
5196be3e 1361 if (o->op_flags & OPf_PARENS)
5f05dabc 1362 break;
1363 goto nomod;
a0d0e21e
LW		 1364 case OP_ENTERSUB:
1365 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1366 !(o->op_flags & OPf_STACKED)) {
1367 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1368 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1369 assert(cUNOPo->op_first->op_type == OP_NULL);
1370 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1371 break;
1372 }
cd06dffe
GS		 1373 else { /* lvalue subroutine call */
1374 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1375 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1376 /* Backward compatibility mode: */
1377 o->op_private |= OPpENTERSUB_INARGS;
1378 break;
1379 }
1380 else { /* Compile-time error message: */
1381 OP *kid = cUNOPo->op_first;
1382 CV *cv;
1383 OP *okid;
1384
1385 if (kid->op_type == OP_PUSHMARK)
1386 goto skip_kids;
1387 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1388 Perl_croak(aTHX_
1389 "panic: unexpected lvalue entersub "
1390 "args: type/targ %ld:%ld",
1391 (long)kid->op_type,kid->op_targ);
1392 kid = kLISTOP->op_first;
1393 skip_kids:
1394 while (kid->op_sibling)
1395 kid = kid->op_sibling;
1396 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1397 /* Indirect call */
1398 if (kid->op_type == OP_METHOD_NAMED
1399 || kid->op_type == OP_METHOD)
1400 {
87d7fd28 1401 UNOP *newop;
cd06dffe
GS		 1402
1403 if (kid->op_sibling || kid->op_next != kid) {
1404 yyerror("panic: unexpected optree near method call");
1405 break;
1406 }
1407
87d7fd28 1408 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1409 newop->op_type = OP_RV2CV;
1410 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1411 newop->op_first = Nullop;
1412 newop->op_next = (OP*)newop;
1413 kid->op_sibling = (OP*)newop;
349fd7b7 1414 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1415 break;
1416 }
1417
1418 if (kid->op_type != OP_RV2CV)
1419 Perl_croak(aTHX_
1420 "panic: unexpected lvalue entersub "
1421 "entry via type/targ %ld:%ld",
1422 (long)kid->op_type,kid->op_targ);
1423 kid->op_private |= OPpLVAL_INTRO;
1424 break; /* Postpone until runtime */
1425 }
1426
1427 okid = kid;
1428 kid = kUNOP->op_first;
1429 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1430 kid = kUNOP->op_first;
1431 if (kid->op_type == OP_NULL)
1432 Perl_croak(aTHX_
1433 "Unexpected constant lvalue entersub "
1434 "entry via type/targ %ld:%ld",
1435 (long)kid->op_type,kid->op_targ);
1436 if (kid->op_type != OP_GV) {
1437 /* Restore RV2CV to check lvalueness */
1438 restore_2cv:
1439 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1440 okid->op_next = kid->op_next;
1441 kid->op_next = okid;
1442 }
1443 else
1444 okid->op_next = Nullop;
1445 okid->op_type = OP_RV2CV;
1446 okid->op_targ = 0;
1447 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1448 okid->op_private |= OPpLVAL_INTRO;
1449 break;
1450 }
1451
638eceb6 1452 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1453 if (!cv)
1454 goto restore_2cv;
1455 if (CvLVALUE(cv))
1456 break;
1457 }
1458 }
79072805
LW		 1459 /* FALL THROUGH */
1460 default:
a0d0e21e
LW		 1461 nomod:
1462 /* grep, foreach, subcalls, refgen */
1463 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1464 break;
cea2e8a9 1465 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1466 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1467 ? "do block"
1468 : (o->op_type == OP_ENTERSUB
1469 ? "non-lvalue subroutine call"
1470 : PL_op_desc[o->op_type])),
22c35a8c 1471 type ? PL_op_desc[type] : "local"));
11343788 1472 return o;
79072805 1473
a0d0e21e
LW		 1474 case OP_PREINC:
1475 case OP_PREDEC:
1476 case OP_POW:
1477 case OP_MULTIPLY:
1478 case OP_DIVIDE:
1479 case OP_MODULO:
1480 case OP_REPEAT:
1481 case OP_ADD:
1482 case OP_SUBTRACT:
1483 case OP_CONCAT:
1484 case OP_LEFT_SHIFT:
1485 case OP_RIGHT_SHIFT:
1486 case OP_BIT_AND:
1487 case OP_BIT_XOR:
1488 case OP_BIT_OR:
1489 case OP_I_MULTIPLY:
1490 case OP_I_DIVIDE:
1491 case OP_I_MODULO:
1492 case OP_I_ADD:
1493 case OP_I_SUBTRACT:
11343788 1494 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1495 goto nomod;
3280af22 1496 PL_modcount++;
a0d0e21e
LW		 1497 break;
1498
79072805 1499 case OP_COND_EXPR:
11343788 1500 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1501 mod(kid, type);
79072805
LW		 1502 break;
1503
1504 case OP_RV2AV:
1505 case OP_RV2HV:
93af7a87 1506 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1507 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1508 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1509 PL_modcount = 10000;
11343788 1510 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1511 }
1512 /* FALL THROUGH */
79072805 1513 case OP_RV2GV:
5dc0d613 1514 if (scalar_mod_type(o, type))
3fe9a6f1 1515 goto nomod;
11343788 1516 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1517 /* FALL THROUGH */
1518 case OP_AASSIGN:
1519 case OP_ASLICE:
1520 case OP_HSLICE:
93a17b20
LW		 1521 case OP_NEXTSTATE:
1522 case OP_DBSTATE:
a0d0e21e
LW		 1523 case OP_REFGEN:
1524 case OP_CHOMP:
3280af22 1525 PL_modcount = 10000;
79072805 1526 break;
463ee0b2 1527 case OP_RV2SV:
11343788 1528 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1529 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1530 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1531 /* FALL THROUGH */
79072805 1532 case OP_GV:
463ee0b2 1533 case OP_AV2ARYLEN:
3280af22 1534 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1535 case OP_SASSIGN:
bf4b1e52
GS		 1536 case OP_ANDASSIGN:
1537 case OP_ORASSIGN:
8990e307 1538 case OP_AELEMFAST:
3280af22 1539 PL_modcount++;
8990e307
LW		 1540 break;
1541
748a9306
LW		 1542 case OP_PADAV:
1543 case OP_PADHV:
3280af22 1544 PL_modcount = 10000;
5196be3e
MB		 1545 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1546 return o; /* Treat \(@foo) like ordinary list. */
1547 if (scalar_mod_type(o, type))
3fe9a6f1 1548 goto nomod;
748a9306
LW		 1549 /* FALL THROUGH */
1550 case OP_PADSV:
3280af22 1551 PL_modcount++;
748a9306 1552 if (!type)
cea2e8a9 1553 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1554 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1555 break;
1556
554b3eca 1557#ifdef USE_THREADS
2faa37cc 1558 case OP_THREADSV:
533c011a 1559 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1560 break;
1561#endif /* USE_THREADS */
1562
748a9306
LW		 1563 case OP_PUSHMARK:
1564 break;
a0d0e21e 1565
69969c6f
SB		 1566 case OP_KEYS:
1567 if (type != OP_SASSIGN)
1568 goto nomod;
5d82c453
GA		 1569 goto lvalue_func;
1570 case OP_SUBSTR:
1571 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1572 goto nomod;
5f05dabc 1573 /* FALL THROUGH */
a0d0e21e 1574 case OP_POS:
463ee0b2 1575 case OP_VEC:
5d82c453 1576 lvalue_func:
11343788
MB		 1577 pad_free(o->op_targ);
1578 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1579 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1580 if (o->op_flags & OPf_KIDS)
1581 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1582 break;
a0d0e21e 1583
463ee0b2
LW		 1584 case OP_AELEM:
1585 case OP_HELEM:
11343788 1586 ref(cBINOPo->op_first, o->op_type);
68dc0745 1587 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1588 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1589 o->op_private |= OPpLVAL_DEFER;
3280af22 1590 PL_modcount++;
463ee0b2
LW		 1591 break;
1592
1593 case OP_SCOPE:
1594 case OP_LEAVE:
1595 case OP_ENTER:
11343788
MB		 1596 if (o->op_flags & OPf_KIDS)
1597 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1598 break;
1599
1600 case OP_NULL:
638bc118
GS		 1601 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1602 goto nomod;
1603 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1604 break;
11343788
MB		 1605 if (o->op_targ != OP_LIST) {
1606 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1607 break;
1608 }
1609 /* FALL THROUGH */
463ee0b2 1610 case OP_LIST:
11343788 1611 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1612 mod(kid, type);
1613 break;
1614 }
11343788 1615 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1616
1617 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1618 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1619 else if (!type) {
11343788
MB		 1620 o->op_private |= OPpLVAL_INTRO;
1621 o->op_flags &= ~OPf_SPECIAL;
3280af22 1622 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1623 }
a0d0e21e 1624 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1625 o->op_flags |= OPf_REF;
1626 return o;
463ee0b2
LW		 1627}
1628
864dbfa3 1629STATIC bool
cea2e8a9 1630S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1631{
1632 switch (type) {
1633 case OP_SASSIGN:
5196be3e 1634 if (o->op_type == OP_RV2GV)
3fe9a6f1 1635 return FALSE;
1636 /* FALL THROUGH */
1637 case OP_PREINC:
1638 case OP_PREDEC:
1639 case OP_POSTINC:
1640 case OP_POSTDEC:
1641 case OP_I_PREINC:
1642 case OP_I_PREDEC:
1643 case OP_I_POSTINC:
1644 case OP_I_POSTDEC:
1645 case OP_POW:
1646 case OP_MULTIPLY:
1647 case OP_DIVIDE:
1648 case OP_MODULO:
1649 case OP_REPEAT:
1650 case OP_ADD:
1651 case OP_SUBTRACT:
1652 case OP_I_MULTIPLY:
1653 case OP_I_DIVIDE:
1654 case OP_I_MODULO:
1655 case OP_I_ADD:
1656 case OP_I_SUBTRACT:
1657 case OP_LEFT_SHIFT:
1658 case OP_RIGHT_SHIFT:
1659 case OP_BIT_AND:
1660 case OP_BIT_XOR:
1661 case OP_BIT_OR:
1662 case OP_CONCAT:
1663 case OP_SUBST:
1664 case OP_TRANS:
49e9fbe6
GS		 1665 case OP_READ:
1666 case OP_SYSREAD:
1667 case OP_RECV:
bf4b1e52
GS		 1668 case OP_ANDASSIGN:
1669 case OP_ORASSIGN:
3fe9a6f1 1670 return TRUE;
1671 default:
1672 return FALSE;
1673 }
1674}
1675
35cd451c 1676STATIC bool
cea2e8a9 1677S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1678{
1679 switch (o->op_type) {
1680 case OP_PIPE_OP:
1681 case OP_SOCKPAIR:
1682 if (argnum == 2)
1683 return TRUE;
1684 /* FALL THROUGH */
1685 case OP_SYSOPEN:
1686 case OP_OPEN:
ded8aa31 1687 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1688 case OP_SOCKET:
1689 case OP_OPEN_DIR:
1690 case OP_ACCEPT:
1691 if (argnum == 1)
1692 return TRUE;
1693 /* FALL THROUGH */
1694 default:
1695 return FALSE;
1696 }
1697}
1698
463ee0b2 1699OP *
864dbfa3 1700Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1701{
1702 OP *kid;
11343788
MB		 1703 if (o && o->op_flags & OPf_KIDS) {
1704 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1705 ref(kid, type);
1706 }
11343788 1707 return o;
463ee0b2
LW		 1708}
1709
1710OP *
864dbfa3 1711Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1712{
1713 OP *kid;
463ee0b2 1714
3280af22 1715 if (!o || PL_error_count)
11343788 1716 return o;
463ee0b2 1717
11343788 1718 switch (o->op_type) {
a0d0e21e 1719 case OP_ENTERSUB:
afebc493 1720 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1721 !(o->op_flags & OPf_STACKED)) {
1722 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1723 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1724 assert(cUNOPo->op_first->op_type == OP_NULL);
1725 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1726 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1727 }
1728 break;
aeea060c 1729
463ee0b2 1730 case OP_COND_EXPR:
11343788 1731 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1732 ref(kid, type);
1733 break;
8990e307 1734 case OP_RV2SV:
35cd451c
GS		 1735 if (type == OP_DEFINED)
1736 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1737 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1738 /* FALL THROUGH */
1739 case OP_PADSV:
5f05dabc 1740 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1741 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1742 : type == OP_RV2HV ? OPpDEREF_HV
1743 : OPpDEREF_SV);
11343788 1744 o->op_flags |= OPf_MOD;
a0d0e21e 1745 }
8990e307
LW		 1746 break;
1747
2faa37cc 1748 case OP_THREADSV:
a863c7d1
MB		 1749 o->op_flags |= OPf_MOD; /* XXX ??? */
1750 break;
1751
463ee0b2
LW		 1752 case OP_RV2AV:
1753 case OP_RV2HV:
aeea060c 1754 o->op_flags |= OPf_REF;
8990e307 1755 /* FALL THROUGH */
463ee0b2 1756 case OP_RV2GV:
35cd451c
GS		 1757 if (type == OP_DEFINED)
1758 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1759 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1760 break;
8990e307 1761
463ee0b2
LW		 1762 case OP_PADAV:
1763 case OP_PADHV:
aeea060c 1764 o->op_flags |= OPf_REF;
79072805 1765 break;
aeea060c 1766
8990e307 1767 case OP_SCALAR:
79072805 1768 case OP_NULL:
11343788 1769 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1770 break;
11343788 1771 ref(cBINOPo->op_first, type);
79072805
LW		 1772 break;
1773 case OP_AELEM:
1774 case OP_HELEM:
11343788 1775 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1776 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1777 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1778 : type == OP_RV2HV ? OPpDEREF_HV
1779 : OPpDEREF_SV);
11343788 1780 o->op_flags |= OPf_MOD;
8990e307 1781 }
79072805
LW		 1782 break;
1783
463ee0b2 1784 case OP_SCOPE:
79072805
LW		 1785 case OP_LEAVE:
1786 case OP_ENTER:
8990e307 1787 case OP_LIST:
11343788 1788 if (!(o->op_flags & OPf_KIDS))
79072805 1789 break;
11343788 1790 ref(cLISTOPo->op_last, type);
79072805 1791 break;
a0d0e21e
LW		 1792 default:
1793 break;
79072805 1794 }
11343788 1795 return scalar(o);
8990e307 1796
79072805
LW		 1797}
1798
09bef843
SB		 1799STATIC OP *
1800S_dup_attrlist(pTHX_ OP *o)
1801{
1802 OP *rop = Nullop;
1803
1804 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1805 * where the first kid is OP_PUSHMARK and the remaining ones
1806 * are OP_CONST. We need to push the OP_CONST values.
1807 */
1808 if (o->op_type == OP_CONST)
1809 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1810 else {
1811 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1812 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1813 if (o->op_type == OP_CONST)
1814 rop = append_elem(OP_LIST, rop,
1815 newSVOP(OP_CONST, o->op_flags,
1816 SvREFCNT_inc(cSVOPo->op_sv)));
1817 }
1818 }
1819 return rop;
1820}
1821
1822STATIC void
1823S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1824{
09bef843
SB		 1825 SV *stashsv;
1826
1827 /* fake up C<use attributes $pkg,$rv,@attrs> */
1828 ENTER; /* need to protect against side-effects of 'use' */
1829 SAVEINT(PL_expect);
1830 if (stash && HvNAME(stash))
1831 stashsv = newSVpv(HvNAME(stash), 0);
1832 else
1833 stashsv = &PL_sv_no;
e4783991 1834
09bef843 1835#define ATTRSMODULE "attributes"
e4783991
GS		 1836
1837 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1838 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1839 Nullsv,
1840 prepend_elem(OP_LIST,
1841 newSVOP(OP_CONST, 0, stashsv),
1842 prepend_elem(OP_LIST,
1843 newSVOP(OP_CONST, 0,
1844 newRV(target)),
1845 dup_attrlist(attrs))));
09bef843
SB		 1846 LEAVE;
1847}
1848
1849STATIC OP *
1850S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1851{
1852 OP *kid;
93a17b20
LW		 1853 I32 type;
1854
3280af22 1855 if (!o || PL_error_count)
11343788 1856 return o;
93a17b20 1857
11343788 1858 type = o->op_type;
93a17b20 1859 if (type == OP_LIST) {
11343788 1860 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1861 my_kid(kid, attrs);
dab48698 1862 } else if (type == OP_UNDEF) {
7766148a 1863 return o;
77ca0c92
LW		 1864 } else if (type == OP_RV2SV || /* "our" declaration */
1865 type == OP_RV2AV ||
1866 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1867 o->op_private |= OPpOUR_INTRO;
77ca0c92 1868 return o;
dab48698 1869 } else if (type != OP_PADSV &&
93a17b20
LW		 1870 type != OP_PADAV &&
1871 type != OP_PADHV &&
1872 type != OP_PUSHMARK)
1873 {
eb64745e
GS		 1874 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1875 PL_op_desc[o->op_type],
1876 PL_in_my == KEY_our ? "our" : "my"));
11343788 1877 return o;
93a17b20 1878 }
09bef843
SB		 1879 else if (attrs && type != OP_PUSHMARK) {
1880 HV *stash;
1881 SV *padsv;
1882 SV **namesvp;
1883
eb64745e
GS		 1884 PL_in_my = FALSE;
1885 PL_in_my_stash = Nullhv;
1886
09bef843
SB		 1887 /* check for C<my Dog $spot> when deciding package */
1888 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1889 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1890 stash = SvSTASH(*namesvp);
1891 else
1892 stash = PL_curstash;
1893 padsv = PAD_SV(o->op_targ);
1894 apply_attrs(stash, padsv, attrs);
1895 }
11343788
MB		 1896 o->op_flags |= OPf_MOD;
1897 o->op_private |= OPpLVAL_INTRO;
1898 return o;
93a17b20
LW		 1899}
1900
1901OP *
09bef843
SB		 1902Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1903{
1904 if (o->op_flags & OPf_PARENS)
1905 list(o);
09bef843
SB		 1906 if (attrs)
1907 SAVEFREEOP(attrs);
eb64745e
GS		 1908 o = my_kid(o, attrs);
1909 PL_in_my = FALSE;
1910 PL_in_my_stash = Nullhv;
1911 return o;
09bef843
SB		 1912}
1913
1914OP *
1915Perl_my(pTHX_ OP *o)
1916{
1917 return my_kid(o, Nullop);
1918}
1919
1920OP *
864dbfa3 1921Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1922{
1923 if (o)
1924 o->op_flags |= OPf_PARENS;
1925 return o;
1926}
1927
1928OP *
864dbfa3 1929Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1930{
d008e5eb 1931 dTHR;
11343788 1932 OP *o;
79072805 1933
e476b1b5 1934 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1935 (left->op_type == OP_RV2AV ||
1936 left->op_type == OP_RV2HV ||
1937 left->op_type == OP_PADAV ||
1938 left->op_type == OP_PADHV)) {
22c35a8c 1939 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1940 right->op_type == OP_TRANS)
1941 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1942 const char *sample = ((left->op_type == OP_RV2AV ||
1943 left->op_type == OP_PADAV)
1944 ? "@array" : "%hash");
e476b1b5 1945 Perl_warner(aTHX_ WARN_MISC,
599cee73
PM		 1946 "Applying %s to %s will act on scalar(%s)",
1947 desc, sample, sample);
2ae324a7 1948 }
1949
79072805
LW		 1950 if (right->op_type == OP_MATCH ||
1951 right->op_type == OP_SUBST ||
1952 right->op_type == OP_TRANS) {
1953 right->op_flags |= OPf_STACKED;
1954 if (right->op_type != OP_MATCH)
463ee0b2 1955 left = mod(left, right->op_type);
79072805 1956 if (right->op_type == OP_TRANS)
11343788 1957 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1958 else
11343788 1959 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1960 if (type == OP_NOT)
11343788
MB		 1961 return newUNOP(OP_NOT, 0, scalar(o));
1962 return o;
79072805
LW		 1963 }
1964 else
1965 return bind_match(type, left,
1966 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1967}
1968
1969OP *
864dbfa3 1970Perl_invert(pTHX_ OP *o)
79072805 1971{
11343788
MB		 1972 if (!o)
1973 return o;
79072805 1974 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1975 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1976}
1977
1978OP *
864dbfa3 1979Perl_scope(pTHX_ OP *o)
79072805
LW		 1980{
1981 if (o) {
3280af22 1982 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1983 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1984 o->op_type = OP_LEAVE;
22c35a8c 1985 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1986 }
1987 else {
1988 if (o->op_type == OP_LINESEQ) {
1989 OP *kid;
1990 o->op_type = OP_SCOPE;
22c35a8c 1991 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1992 kid = ((LISTOP*)o)->op_first;
1993 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1994 null(kid);
463ee0b2
LW		 1995 }
1996 else
748a9306 1997 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1998 }
79072805
LW		 1999 }
2000 return o;
2001}
2002
b3ac6de7 2003void
864dbfa3 2004Perl_save_hints(pTHX)
b3ac6de7 2005{
3280af22
NIS		 2006 SAVEI32(PL_hints);
2007 SAVESPTR(GvHV(PL_hintgv));
2008 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2009 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2010}
2011
a0d0e21e 2012int
864dbfa3 2013Perl_block_start(pTHX_ int full)
79072805 2014{
11343788 2015 dTHR;
3280af22 2016 int retval = PL_savestack_ix;
b3ac6de7 2017
3280af22 2018 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2019 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2020 if (full)
2021 PL_comppad_name_fill = PL_comppad_name_floor;
2022 if (PL_comppad_name_floor < 0)
2023 PL_comppad_name_floor = 0;
3280af22
NIS		 2024 SAVEI32(PL_min_intro_pending);
2025 SAVEI32(PL_max_intro_pending);
2026 PL_min_intro_pending = 0;
2027 SAVEI32(PL_comppad_name_fill);
2028 SAVEI32(PL_padix_floor);
2029 PL_padix_floor = PL_padix;
2030 PL_pad_reset_pending = FALSE;
b3ac6de7 2031 SAVEHINTS();
3280af22 2032 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2033 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2034 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2035 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2036 SAVEFREESV(PL_compiling.cop_warnings) ;
2037 }
a0d0e21e
LW		 2038 return retval;
2039}
2040
2041OP*
864dbfa3 2042Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2043{
11343788 2044 dTHR;
3280af22 2045 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2046 OP* retval = scalarseq(seq);
a0d0e21e 2047 LEAVE_SCOPE(floor);
3280af22 2048 PL_pad_reset_pending = FALSE;
e24b16f9 2049 PL_compiling.op_private = PL_hints;
a0d0e21e 2050 if (needblockscope)
3280af22
NIS		 2051 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2052 pad_leavemy(PL_comppad_name_fill);
2053 PL_cop_seqmax++;
a0d0e21e
LW		 2054 return retval;
2055}
2056
76e3520e 2057STATIC OP *
cea2e8a9 2058S_newDEFSVOP(pTHX)
54b9620d
MB		 2059{
2060#ifdef USE_THREADS
2061 OP *o = newOP(OP_THREADSV, 0);
2062 o->op_targ = find_threadsv("_");
2063 return o;
2064#else
3280af22 2065 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2066#endif /* USE_THREADS */
2067}
2068
a0d0e21e 2069void
864dbfa3 2070Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2071{
11343788 2072 dTHR;
3280af22 2073 if (PL_in_eval) {
b295d113
TH		 2074 if (PL_eval_root)
2075 return;
faef0170
HS		 2076 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2077 ((PL_in_eval & EVAL_KEEPERR)
2078 ? OPf_SPECIAL : 0), o);
3280af22 2079 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2080 PL_eval_root->op_private |= OPpREFCOUNTED;
2081 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2082 PL_eval_root->op_next = 0;
2083 peep(PL_eval_start);
a0d0e21e
LW		 2084 }
2085 else {
5dc0d613 2086 if (!o)
a0d0e21e 2087 return;
3280af22
NIS		 2088 PL_main_root = scope(sawparens(scalarvoid(o)));
2089 PL_curcop = &PL_compiling;
2090 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2091 PL_main_root->op_private |= OPpREFCOUNTED;
2092 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2093 PL_main_root->op_next = 0;
2094 peep(PL_main_start);
2095 PL_compcv = 0;
3841441e 2096
4fdae800 2097 /* Register with debugger */
84902520 2098 if (PERLDB_INTER) {
864dbfa3 2099 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2100 if (cv) {
2101 dSP;
924508f0 2102 PUSHMARK(SP);
cc49e20b 2103 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2104 PUTBACK;
864dbfa3 2105 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2106 }
2107 }
79072805 2108 }
79072805
LW		 2109}
2110
2111OP *
864dbfa3 2112Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2113{
2114 if (o->op_flags & OPf_PARENS)
2115 list(o);
8990e307 2116 else {
d008e5eb 2117 dTHR;
599cee73 2118 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2119 char *s;
834a4ddd 2120 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2121 if (*s == ';' || *s == '=')
eb64745e
GS		 2122 Perl_warner(aTHX_ WARN_PARENTHESIS,
2123 "Parentheses missing around \"%s\" list",
2124 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2125 }
2126 }
93a17b20 2127 if (lex)
eb64745e 2128 o = my(o);
93a17b20 2129 else
eb64745e
GS		 2130 o = mod(o, OP_NULL); /* a bit kludgey */
2131 PL_in_my = FALSE;
2132 PL_in_my_stash = Nullhv;
2133 return o;
79072805
LW		 2134}
2135
2136OP *
864dbfa3 2137Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2138{
2139 if (o->op_type == OP_LIST) {
554b3eca
MB		 2140 OP *o2;
2141#ifdef USE_THREADS
2faa37cc 2142 o2 = newOP(OP_THREADSV, 0);
54b9620d 2143 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2144#else
2145 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2146#endif /* USE_THREADS */
2147 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2148 }
2149 return o;
2150}
2151
2152OP *
864dbfa3 2153Perl_fold_constants(pTHX_ register OP *o)
79072805 2154{
11343788 2155 dTHR;
79072805
LW		 2156 register OP *curop;
2157 I32 type = o->op_type;
748a9306 2158 SV *sv;
79072805 2159
22c35a8c 2160 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2161 scalar(o);
b162f9ea 2162 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2163 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2164
eac055e9
GS		 2165 /* integerize op, unless it happens to be C<-foo>.
2166 * XXX should pp_i_negate() do magic string negation instead? */
2167 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2168 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2169 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2170 {
22c35a8c 2171 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2172 }
85e6fe83 2173
22c35a8c 2174 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2175 goto nope;
2176
de939608 2177 switch (type) {
7a52d87a
GS		 2178 case OP_NEGATE:
2179 /* XXX might want a ck_negate() for this */
2180 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2181 break;
de939608
CS		 2182 case OP_SPRINTF:
2183 case OP_UCFIRST:
2184 case OP_LCFIRST:
2185 case OP_UC:
2186 case OP_LC:
69dcf70c
MB		 2187 case OP_SLT:
2188 case OP_SGT:
2189 case OP_SLE:
2190 case OP_SGE:
2191 case OP_SCMP:
2192
de939608
CS		 2193 if (o->op_private & OPpLOCALE)
2194 goto nope;
2195 }
2196
3280af22 2197 if (PL_error_count)
a0d0e21e
LW		 2198 goto nope; /* Don't try to run w/ errors */
2199
79072805 2200 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2201 if ((curop->op_type != OP_CONST ||
2202 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2203 curop->op_type != OP_LIST &&
2204 curop->op_type != OP_SCALAR &&
2205 curop->op_type != OP_NULL &&
2206 curop->op_type != OP_PUSHMARK)
2207 {
79072805
LW		 2208 goto nope;
2209 }
2210 }
2211
2212 curop = LINKLIST(o);
2213 o->op_next = 0;
533c011a 2214 PL_op = curop;
cea2e8a9 2215 CALLRUNOPS(aTHX);
3280af22 2216 sv = *(PL_stack_sp--);
748a9306 2217 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2218 pad_swipe(o->op_targ);
748a9306
LW		 2219 else if (SvTEMP(sv)) { /* grab mortal temp? */
2220 (void)SvREFCNT_inc(sv);
2221 SvTEMP_off(sv);
85e6fe83 2222 }
79072805
LW		 2223 op_free(o);
2224 if (type == OP_RV2GV)
b1cb66bf 2225 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2226 else {
ee580363
GS		 2227 /* try to smush double to int, but don't smush -2.0 to -2 */
2228 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2229 type != OP_NEGATE)
2230 {
748a9306 2231 IV iv = SvIV(sv);
65202027 2232 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2233 SvREFCNT_dec(sv);
2234 sv = newSViv(iv);
2235 }
b1cb66bf 2236 else
2237 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2238 }
2239 return newSVOP(OP_CONST, 0, sv);
2240 }
aeea060c 2241
79072805 2242 nope:
22c35a8c 2243 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2244 return o;
79072805 2245
3280af22 2246 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2247 if (type == OP_MODULO
2248 || type == OP_DIVIDE
2249 || !(o->op_flags & OPf_KIDS))
2250 {
85e6fe83 2251 return o;
4bb9f687 2252 }
85e6fe83
LW		 2253
2254 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2255 if (curop->op_type == OP_CONST) {
b1cb66bf 2256 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2257 continue;
2258 return o;
2259 }
22c35a8c 2260 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2261 continue;
2262 return o;
2263 }
22c35a8c 2264 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2265 }
2266
79072805
LW		 2267 return o;
2268}
2269
2270OP *
864dbfa3 2271Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2272{
11343788 2273 dTHR;
79072805 2274 register OP *curop;
3280af22 2275 I32 oldtmps_floor = PL_tmps_floor;
79072805 2276
a0d0e21e 2277 list(o);
3280af22 2278 if (PL_error_count)
a0d0e21e
LW		 2279 return o; /* Don't attempt to run with errors */
2280
533c011a 2281 PL_op = curop = LINKLIST(o);
a0d0e21e 2282 o->op_next = 0;
7d4045d4 2283 peep(curop);
cea2e8a9
GS		 2284 pp_pushmark();
2285 CALLRUNOPS(aTHX);
533c011a 2286 PL_op = curop;
cea2e8a9 2287 pp_anonlist();
3280af22 2288 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2289
2290 o->op_type = OP_RV2AV;
22c35a8c 2291 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2292 curop = ((UNOP*)o)->op_first;
3280af22 2293 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2294 op_free(curop);
79072805
LW		 2295 linklist(o);
2296 return list(o);
2297}
2298
2299OP *
864dbfa3 2300Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2301{
2302 OP *kid;
a0d0e21e 2303 OP *last = 0;
79072805 2304
11343788
MB		 2305 if (!o || o->op_type != OP_LIST)
2306 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2307 else
5dc0d613 2308 o->op_flags &= ~OPf_WANT;
79072805 2309
22c35a8c 2310 if (!(PL_opargs[type] & OA_MARK))
11343788 2311 null(cLISTOPo->op_first);
8990e307 2312
11343788 2313 o->op_type = type;
22c35a8c 2314 o->op_ppaddr = PL_ppaddr[type];
11343788 2315 o->op_flags |= flags;
79072805 2316
11343788
MB		 2317 o = CHECKOP(type, o);
2318 if (o->op_type != type)
2319 return o;
79072805 2320
11343788 2321 if (cLISTOPo->op_children < 7) {
79072805 2322 /* XXX do we really need to do this if we're done appending?? */
11343788 2323 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2324 last = kid;
11343788 2325 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2326 }
2327
11343788 2328 return fold_constants(o);
79072805
LW		 2329}
2330
2331/* List constructors */
2332
2333OP *
864dbfa3 2334Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2335{
2336 if (!first)
2337 return last;
8990e307
LW		 2338
2339 if (!last)
79072805 2340 return first;
8990e307 2341
155aba94
GS		 2342 if (first->op_type != type
2343 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2344 {
2345 return newLISTOP(type, 0, first, last);
2346 }
79072805 2347
a0d0e21e
LW		 2348 if (first->op_flags & OPf_KIDS)
2349 ((LISTOP*)first)->op_last->op_sibling = last;
2350 else {
2351 first->op_flags |= OPf_KIDS;
2352 ((LISTOP*)first)->op_first = last;
2353 }
2354 ((LISTOP*)first)->op_last = last;
2355 ((LISTOP*)first)->op_children++;
2356 return first;
79072805
LW		 2357}
2358
2359OP *
864dbfa3 2360Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2361{
2362 if (!first)
2363 return (OP*)last;
8990e307
LW		 2364
2365 if (!last)
79072805 2366 return (OP*)first;
8990e307
LW		 2367
2368 if (first->op_type != type)
79072805 2369 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2370
2371 if (last->op_type != type)
79072805
LW		 2372 return append_elem(type, (OP*)first, (OP*)last);
2373
2374 first->op_last->op_sibling = last->op_first;
2375 first->op_last = last->op_last;
2376 first->op_children += last->op_children;
2377 if (first->op_children)
acb74605 2378 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2379
2380#ifdef PL_OP_SLAB_ALLOC
2381#else
2382 Safefree(last);
2383#endif
79072805
LW		 2384 return (OP*)first;
2385}
2386
2387OP *
864dbfa3 2388Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2389{
2390 if (!first)
2391 return last;
8990e307
LW		 2392
2393 if (!last)
79072805 2394 return first;
8990e307
LW		 2395
2396 if (last->op_type == type) {
2397 if (type == OP_LIST) { /* already a PUSHMARK there */
2398 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2399 ((LISTOP*)last)->op_first->op_sibling = first;
2400 }
2401 else {
2402 if (!(last->op_flags & OPf_KIDS)) {
2403 ((LISTOP*)last)->op_last = first;
2404 last->op_flags |= OPf_KIDS;
2405 }
2406 first->op_sibling = ((LISTOP*)last)->op_first;
2407 ((LISTOP*)last)->op_first = first;
79072805 2408 }
79072805
LW		 2409 ((LISTOP*)last)->op_children++;
2410 return last;
2411 }
2412
2413 return newLISTOP(type, 0, first, last);
2414}
2415
2416/* Constructors */
2417
2418OP *
864dbfa3 2419Perl_newNULLLIST(pTHX)
79072805 2420{
8990e307
LW		 2421 return newOP(OP_STUB, 0);
2422}
2423
2424OP *
864dbfa3 2425Perl_force_list(pTHX_ OP *o)
8990e307 2426{
11343788
MB		 2427 if (!o || o->op_type != OP_LIST)
2428 o = newLISTOP(OP_LIST, 0, o, Nullop);
2429 null(o);
2430 return o;
79072805
LW		 2431}
2432
2433OP *
864dbfa3 2434Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2435{
2436 LISTOP *listop;
2437
b7dc083c 2438 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2439
2440 listop->op_type = type;
22c35a8c 2441 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2442 listop->op_children = (first != 0) + (last != 0);
2443 listop->op_flags = flags;
79072805
LW		 2444
2445 if (!last && first)
2446 last = first;
2447 else if (!first && last)
2448 first = last;
8990e307
LW		 2449 else if (first)
2450 first->op_sibling = last;
79072805
LW		 2451 listop->op_first = first;
2452 listop->op_last = last;
8990e307
LW		 2453 if (type == OP_LIST) {
2454 OP* pushop;
2455 pushop = newOP(OP_PUSHMARK, 0);
2456 pushop->op_sibling = first;
2457 listop->op_first = pushop;
2458 listop->op_flags |= OPf_KIDS;
2459 if (!last)
2460 listop->op_last = pushop;
2461 }
2462 else if (listop->op_children)
2463 listop->op_flags |= OPf_KIDS;
79072805
LW		 2464
2465 return (OP*)listop;
2466}
2467
2468OP *
864dbfa3 2469Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2470{
11343788 2471 OP *o;
b7dc083c 2472 NewOp(1101, o, 1, OP);
11343788 2473 o->op_type = type;
22c35a8c 2474 o->op_ppaddr = PL_ppaddr[type];
11343788 2475 o->op_flags = flags;
79072805 2476
11343788
MB		 2477 o->op_next = o;
2478 o->op_private = 0 + (flags >> 8);
22c35a8c 2479 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2480 scalar(o);
22c35a8c 2481 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2482 o->op_targ = pad_alloc(type, SVs_PADTMP);
2483 return CHECKOP(type, o);
79072805
LW		 2484}
2485
2486OP *
864dbfa3 2487Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2488{
2489 UNOP *unop;
2490
93a17b20 2491 if (!first)
aeea060c 2492 first = newOP(OP_STUB, 0);
22c35a8c 2493 if (PL_opargs[type] & OA_MARK)
8990e307 2494 first = force_list(first);
93a17b20 2495
b7dc083c 2496 NewOp(1101, unop, 1, UNOP);
79072805 2497 unop->op_type = type;
22c35a8c 2498 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2499 unop->op_first = first;
2500 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2501 unop->op_private = 1 | (flags >> 8);
e50aee73 2502 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2503 if (unop->op_next)
2504 return (OP*)unop;
2505
a0d0e21e 2506 return fold_constants((OP *) unop);
79072805
LW		 2507}
2508
2509OP *
864dbfa3 2510Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2511{
2512 BINOP *binop;
b7dc083c 2513 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2514
2515 if (!first)
2516 first = newOP(OP_NULL, 0);
2517
2518 binop->op_type = type;
22c35a8c 2519 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2520 binop->op_first = first;
2521 binop->op_flags = flags | OPf_KIDS;
2522 if (!last) {
2523 last = first;
c07a80fd 2524 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2525 }
2526 else {
c07a80fd 2527 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2528 first->op_sibling = last;
2529 }
2530
e50aee73 2531 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2532 if (binop->op_next || binop->op_type != type)
79072805
LW		 2533 return (OP*)binop;
2534
7284ab6f 2535 binop->op_last = binop->op_first->op_sibling;
79072805 2536
a0d0e21e 2537 return fold_constants((OP *)binop);
79072805
LW		 2538}
2539
a0ed51b3
LW		 2540static int
2541utf8compare(const void *a, const void *b)
2542{
2543 int i;
2544 for (i = 0; i < 10; i++) {
2545 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2546 return -1;
2547 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2548 return 1;
2549 }
2550 return 0;
2551}
2552
79072805 2553OP *
864dbfa3 2554Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2555{
79072805
LW		 2556 SV *tstr = ((SVOP*)expr)->op_sv;
2557 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2558 STRLEN tlen;
2559 STRLEN rlen;
ec49126f 2560 register U8 *t = (U8*)SvPV(tstr, tlen);
2561 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2562 register I32 i;
2563 register I32 j;
a0ed51b3 2564 I32 del;
79072805 2565 I32 complement;
5d06d08e 2566 I32 squash;
79072805
LW		 2567 register short *tbl;
2568
11343788 2569 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2570 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2571 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2572
a0ed51b3 2573 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2574 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2575 SV* transv = 0;
2576 U8* tend = t + tlen;
2577 U8* rend = r + rlen;
2578 I32 ulen;
2579 U32 tfirst = 1;
2580 U32 tlast = 0;
2581 I32 tdiff;
2582 U32 rfirst = 1;
2583 U32 rlast = 0;
2584 I32 rdiff;
2585 I32 diff;
2586 I32 none = 0;
2587 U32 max = 0;
2588 I32 bits;
2589 I32 grows = 0;
2590 I32 havefinal = 0;
2591 U32 final;
a0ed51b3
LW		 2592 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2593 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2594
2595 if (complement) {
806e7201 2596 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3
LW		 2597 U8** cp;
2598 UV nextmin = 0;
2599 New(1109, cp, tlen, U8*);
2600 i = 0;
79cb57f6 2601 transv = newSVpvn("",0);
a0ed51b3
LW		 2602 while (t < tend) {
2603 cp[i++] = t;
2604 t += UTF8SKIP(t);
2605 if (*t == 0xff) {
2606 t++;
2607 t += UTF8SKIP(t);
2608 }
2609 }
2610 qsort(cp, i, sizeof(U8*), utf8compare);
2611 for (j = 0; j < i; j++) {
2612 U8 *s = cp[j];
2613 UV val = utf8_to_uv(s, &ulen);
2614 s += ulen;
2615 diff = val - nextmin;
2616 if (diff > 0) {
2617 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2618 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2619 if (diff > 1) {
2620 t = uv_to_utf8(tmpbuf, val - 1);
2621 sv_catpvn(transv, "\377", 1);
dfe13c55 2622 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2623 }
2624 }
2625 if (*s == 0xff)
2626 val = utf8_to_uv(s+1, &ulen);
2627 if (val >= nextmin)
2628 nextmin = val + 1;
2629 }
2630 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2631 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2632 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2633 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2634 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2635 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2636 tlen = SvCUR(transv);
2637 tend = t + tlen;
2638 }
2639 else if (!rlen && !del) {
2640 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2641 }
2642 if (!squash) {
2643 if (to_utf && from_utf) { /* only counting characters */
2644 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2645 o->op_private |= OPpTRANS_IDENTICAL;
2646 }
2647 else { /* straight latin-1 translation */
2648 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2649 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2650 o->op_private |= OPpTRANS_IDENTICAL;
2651 }
a0ed51b3
LW		 2652 }
2653
2654 while (t < tend || tfirst <= tlast) {
2655 /* see if we need more "t" chars */
2656 if (tfirst > tlast) {
2657 tfirst = (I32)utf8_to_uv(t, &ulen);
2658 t += ulen;
2659 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2660 tlast = (I32)utf8_to_uv(++t, &ulen);
2661 t += ulen;
2662 }
2663 else
2664 tlast = tfirst;
2665 }
2666
2667 /* now see if we need more "r" chars */
2668 if (rfirst > rlast) {
2669 if (r < rend) {
2670 rfirst = (I32)utf8_to_uv(r, &ulen);
2671 r += ulen;
2672 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2673 rlast = (I32)utf8_to_uv(++r, &ulen);
2674 r += ulen;
2675 }
2676 else
2677 rlast = rfirst;
2678 }
2679 else {
2680 if (!havefinal++)
2681 final = rlast;
2682 rfirst = rlast = 0xffffffff;
2683 }
2684 }
2685
2686 /* now see which range will peter our first, if either. */
2687 tdiff = tlast - tfirst;
2688 rdiff = rlast - rfirst;
2689
2690 if (tdiff <= rdiff)
2691 diff = tdiff;
2692 else
2693 diff = rdiff;
2694
2695 if (rfirst == 0xffffffff) {
2696 diff = tdiff; /* oops, pretend rdiff is infinite */
2697 if (diff > 0)
894356b3
GS		 2698 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2699 (long)tfirst, (long)tlast);
a0ed51b3 2700 else
894356b3 2701 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2702 }
2703 else {
2704 if (diff > 0)
894356b3
GS		 2705 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2706 (long)tfirst, (long)(tfirst + diff),
2707 (long)rfirst);
a0ed51b3 2708 else
894356b3
GS		 2709 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2710 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2711
2712 if (rfirst + diff > max)
2713 max = rfirst + diff;
2714 rfirst += diff + 1;
2715 if (!grows) {
2716 if (rfirst <= 0x80)
2717 ;
2718 else if (rfirst <= 0x800)
2719 grows |= (tfirst < 0x80);
2720 else if (rfirst <= 0x10000)
2721 grows |= (tfirst < 0x800);
2722 else if (rfirst <= 0x200000)
2723 grows |= (tfirst < 0x10000);
2724 else if (rfirst <= 0x4000000)
2725 grows |= (tfirst < 0x200000);
2726 else if (rfirst <= 0x80000000)
2727 grows |= (tfirst < 0x4000000);
2728 }
2729 }
2730 tfirst += diff + 1;
2731 }
2732
2733 none = ++max;
2734 if (del)
2735 del = ++max;
2736
2737 if (max > 0xffff)
2738 bits = 32;
2739 else if (max > 0xff)
2740 bits = 16;
2741 else
2742 bits = 8;
2743
2744 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2745 SvREFCNT_dec(listsv);
2746 if (transv)
2747 SvREFCNT_dec(transv);
2748
2749 if (!del && havefinal)
2750 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2751
2752 if (grows && to_utf)
2753 o->op_private |= OPpTRANS_GROWS;
2754
2755 op_free(expr);
2756 op_free(repl);
2757 return o;
2758 }
2759
2760 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2761 if (complement) {
2762 Zero(tbl, 256, short);
2763 for (i = 0; i < tlen; i++)
ec49126f 2764 tbl[t[i]] = -1;
79072805
LW		 2765 for (i = 0, j = 0; i < 256; i++) {
2766 if (!tbl[i]) {
2767 if (j >= rlen) {
a0ed51b3 2768 if (del)
79072805
LW		 2769 tbl[i] = -2;
2770 else if (rlen)
ec49126f 2771 tbl[i] = r[j-1];
79072805
LW		 2772 else
2773 tbl[i] = i;
2774 }
2775 else
ec49126f 2776 tbl[i] = r[j++];
79072805
LW		 2777 }
2778 }
2779 }
2780 else {
a0ed51b3 2781 if (!rlen && !del) {
79072805 2782 r = t; rlen = tlen;
5d06d08e 2783 if (!squash)
4757a243 2784 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2785 }
2786 for (i = 0; i < 256; i++)
2787 tbl[i] = -1;
2788 for (i = 0, j = 0; i < tlen; i++,j++) {
2789 if (j >= rlen) {
a0ed51b3 2790 if (del) {
ec49126f 2791 if (tbl[t[i]] == -1)
2792 tbl[t[i]] = -2;
79072805
LW		 2793 continue;
2794 }
2795 --j;
2796 }
ec49126f 2797 if (tbl[t[i]] == -1)
2798 tbl[t[i]] = r[j];
79072805
LW		 2799 }
2800 }
2801 op_free(expr);
2802 op_free(repl);
2803
11343788 2804 return o;
79072805
LW		 2805}
2806
2807OP *
864dbfa3 2808Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2809{
11343788 2810 dTHR;
79072805
LW		 2811 PMOP *pmop;
2812
b7dc083c 2813 NewOp(1101, pmop, 1, PMOP);
79072805 2814 pmop->op_type = type;
22c35a8c 2815 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2816 pmop->op_flags = flags;
c07a80fd 2817 pmop->op_private = 0 | (flags >> 8);
79072805 2818
3280af22 2819 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2820 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2821 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2822 pmop->op_pmpermflags |= PMf_LOCALE;
2823 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2824
79072805 2825 /* link into pm list */
3280af22
NIS		 2826 if (type != OP_TRANS && PL_curstash) {
2827 pmop->op_pmnext = HvPMROOT(PL_curstash);
2828 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2829 }
2830
2831 return (OP*)pmop;
2832}
2833
2834OP *
864dbfa3 2835Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2836{
5c0ca799 2837 dTHR;
79072805
LW		 2838 PMOP *pm;
2839 LOGOP *rcop;
ce862d02 2840 I32 repl_has_vars = 0;
79072805 2841
11343788
MB		 2842 if (o->op_type == OP_TRANS)
2843 return pmtrans(o, expr, repl);
79072805 2844
3280af22 2845 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2846 pm = (PMOP*)o;
79072805
LW		 2847
2848 if (expr->op_type == OP_CONST) {
463ee0b2 2849 STRLEN plen;
79072805 2850 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2851 char *p = SvPV(pat, plen);
11343788 2852 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2853 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2854 p = SvPV(pat, plen);
79072805
LW		 2855 pm->op_pmflags |= PMf_SKIPWHITE;
2856 }
393fec97 2857 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2858 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2859 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2860 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2861 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2862 op_free(expr);
2863 }
2864 else {
393fec97
GS		 2865 if (PL_hints & HINT_UTF8)
2866 pm->op_pmdynflags |= PMdf_UTF8;
3280af22
NIS		 2867 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2868 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2869 ? OP_REGCRESET
2870 : OP_REGCMAYBE),0,expr);
463ee0b2 2871
b7dc083c 2872 NewOp(1101, rcop, 1, LOGOP);
79072805 2873 rcop->op_type = OP_REGCOMP;
22c35a8c 2874 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2875 rcop->op_first = scalar(expr);
3280af22 2876 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2877 ? (OPf_SPECIAL | OPf_KIDS)
2878 : OPf_KIDS);
79072805 2879 rcop->op_private = 1;
11343788 2880 rcop->op_other = o;
79072805
LW		 2881
2882 /* establish postfix order */
3280af22 2883 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2884 LINKLIST(expr);
2885 rcop->op_next = expr;
2886 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2887 }
2888 else {
2889 rcop->op_next = LINKLIST(expr);
2890 expr->op_next = (OP*)rcop;
2891 }
79072805 2892
11343788 2893 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2894 }
2895
2896 if (repl) {
748a9306 2897 OP *curop;
0244c3a4 2898 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2899 curop = 0;
57843af0
GS		 2900 if (CopLINE(PL_curcop) < PL_multi_end)
2901 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2902 }
554b3eca 2903#ifdef USE_THREADS
2faa37cc 2904 else if (repl->op_type == OP_THREADSV
554b3eca 2905 && strchr("&`'123456789+",
533c011a 2906 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2907 {
2908 curop = 0;
2909 }
2910#endif /* USE_THREADS */
748a9306
LW		 2911 else if (repl->op_type == OP_CONST)
2912 curop = repl;
79072805 2913 else {
79072805
LW		 2914 OP *lastop = 0;
2915 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2916 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2917#ifdef USE_THREADS
ce862d02
IZ		 2918 if (curop->op_type == OP_THREADSV) {
2919 repl_has_vars = 1;
be949f6f 2920 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2921 break;
554b3eca
MB		 2922 }
2923#else
79072805 2924 if (curop->op_type == OP_GV) {
638eceb6 2925 GV *gv = cGVOPx_gv(curop);
ce862d02 2926 repl_has_vars = 1;
93a17b20 2927 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2928 break;
2929 }
554b3eca 2930#endif /* USE_THREADS */
79072805
LW		 2931 else if (curop->op_type == OP_RV2CV)
2932 break;
2933 else if (curop->op_type == OP_RV2SV ||
2934 curop->op_type == OP_RV2AV ||
2935 curop->op_type == OP_RV2HV ||
2936 curop->op_type == OP_RV2GV) {
2937 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2938 break;
2939 }
748a9306
LW		 2940 else if (curop->op_type == OP_PADSV ||
2941 curop->op_type == OP_PADAV ||
2942 curop->op_type == OP_PADHV ||
554b3eca 2943 curop->op_type == OP_PADANY) {
ce862d02 2944 repl_has_vars = 1;
748a9306 2945 }
1167e5da
SM		 2946 else if (curop->op_type == OP_PUSHRE)
2947 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2948 else
2949 break;
2950 }
2951 lastop = curop;
2952 }
748a9306 2953 }
ce862d02
IZ		 2954 if (curop == repl
2955 && !(repl_has_vars
2956 && (!pm->op_pmregexp
2957 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2958 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2959 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2960 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2961 }
2962 else {
ce862d02
IZ		 2963 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2964 pm->op_pmflags |= PMf_MAYBE_CONST;
2965 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2966 }
b7dc083c 2967 NewOp(1101, rcop, 1, LOGOP);
748a9306 2968 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2969 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2970 rcop->op_first = scalar(repl);
2971 rcop->op_flags |= OPf_KIDS;
2972 rcop->op_private = 1;
11343788 2973 rcop->op_other = o;
748a9306
LW		 2974
2975 /* establish postfix order */
2976 rcop->op_next = LINKLIST(repl);
2977 repl->op_next = (OP*)rcop;
2978
2979 pm->op_pmreplroot = scalar((OP*)rcop);
2980 pm->op_pmreplstart = LINKLIST(rcop);
2981 rcop->op_next = 0;
79072805
LW		 2982 }
2983 }
2984
2985 return (OP*)pm;
2986}
2987
2988OP *
864dbfa3 2989Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2990{
2991 SVOP *svop;
b7dc083c 2992 NewOp(1101, svop, 1, SVOP);
79072805 2993 svop->op_type = type;
22c35a8c 2994 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2995 svop->op_sv = sv;
2996 svop->op_next = (OP*)svop;
2997 svop->op_flags = flags;
22c35a8c 2998 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2999 scalar((OP*)svop);
22c35a8c 3000 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3001 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3002 return CHECKOP(type, svop);
79072805
LW		 3003}
3004
3005OP *
350de78d
GS		 3006Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3007{
3008 PADOP *padop;
3009 NewOp(1101, padop, 1, PADOP);
3010 padop->op_type = type;
3011 padop->op_ppaddr = PL_ppaddr[type];
3012 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3013 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3014 PL_curpad[padop->op_padix] = sv;
7766f137 3015 SvPADTMP_on(sv);
350de78d
GS		 3016 padop->op_next = (OP*)padop;
3017 padop->op_flags = flags;
3018 if (PL_opargs[type] & OA_RETSCALAR)
3019 scalar((OP*)padop);
3020 if (PL_opargs[type] & OA_TARGET)
3021 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3022 return CHECKOP(type, padop);
3023}
3024
3025OP *
864dbfa3 3026Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3027{
11343788 3028 dTHR;
350de78d 3029#ifdef USE_ITHREADS
743e66e6 3030 GvIN_PAD_on(gv);
350de78d
GS		 3031 return newPADOP(type, flags, SvREFCNT_inc(gv));
3032#else
7934575e 3033 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3034#endif
79072805
LW		 3035}
3036
3037OP *
864dbfa3 3038Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3039{
3040 PVOP *pvop;
b7dc083c 3041 NewOp(1101, pvop, 1, PVOP);
79072805 3042 pvop->op_type = type;
22c35a8c 3043 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3044 pvop->op_pv = pv;
3045 pvop->op_next = (OP*)pvop;
3046 pvop->op_flags = flags;
22c35a8c 3047 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3048 scalar((OP*)pvop);
22c35a8c 3049 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3050 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3051 return CHECKOP(type, pvop);
79072805
LW		 3052}
3053
79072805 3054void
864dbfa3 3055Perl_package(pTHX_ OP *o)
79072805 3056{
11343788 3057 dTHR;
93a17b20 3058 SV *sv;
79072805 3059
3280af22
NIS		 3060 save_hptr(&PL_curstash);
3061 save_item(PL_curstname);
11343788 3062 if (o) {
463ee0b2
LW		 3063 STRLEN len;
3064 char *name;
11343788 3065 sv = cSVOPo->op_sv;
463ee0b2 3066 name = SvPV(sv, len);
3280af22
NIS		 3067 PL_curstash = gv_stashpvn(name,len,TRUE);
3068 sv_setpvn(PL_curstname, name, len);
11343788 3069 op_free(o);
93a17b20
LW		 3070 }
3071 else {
3280af22
NIS		 3072 sv_setpv(PL_curstname,"<none>");
3073 PL_curstash = Nullhv;
93a17b20 3074 }
7ad382f4 3075 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3076 PL_copline = NOLINE;
3077 PL_expect = XSTATE;
79072805
LW		 3078}
3079
85e6fe83 3080void
864dbfa3 3081Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3082{
a0d0e21e 3083 OP *pack;
a0d0e21e
LW		 3084 OP *rqop;
3085 OP *imop;
b1cb66bf 3086 OP *veop;
78ca652e 3087 GV *gv;
85e6fe83 3088
a0d0e21e 3089 if (id->op_type != OP_CONST)
cea2e8a9 3090 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3091
b1cb66bf 3092 veop = Nullop;
3093
0f79a09d 3094 if (version != Nullop) {
b1cb66bf 3095 SV *vesv = ((SVOP*)version)->op_sv;
3096
44dcb63b 3097 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3098 arg = version;
3099 }
3100 else {
3101 OP *pack;
0f79a09d 3102 SV *meth;
b1cb66bf 3103
44dcb63b 3104 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3105 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3106
3107 /* Make copy of id so we don't free it twice */
3108 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3109
3110 /* Fake up a method call to VERSION */
0f79a09d
GS		 3111 meth = newSVpvn("VERSION",7);
3112 sv_upgrade(meth, SVt_PVIV);
155aba94 3113 (void)SvIOK_on(meth);
0f79a09d 3114 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3115 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3116 append_elem(OP_LIST,
0f79a09d
GS		 3117 prepend_elem(OP_LIST, pack, list(version)),
3118 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3119 }
3120 }
aeea060c 3121
a0d0e21e 3122 /* Fake up an import/unimport */
4633a7c4
LW		 3123 if (arg && arg->op_type == OP_STUB)
3124 imop = arg; /* no import on explicit () */
44dcb63b 3125 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3126 imop = Nullop; /* use 5.0; */
3127 }
4633a7c4 3128 else {
0f79a09d
GS		 3129 SV *meth;
3130
4633a7c4
LW		 3131 /* Make copy of id so we don't free it twice */
3132 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3133
3134 /* Fake up a method call to import/unimport */
3135 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3136 sv_upgrade(meth, SVt_PVIV);
155aba94 3137 (void)SvIOK_on(meth);
0f79a09d 3138 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3139 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3140 append_elem(OP_LIST,
3141 prepend_elem(OP_LIST, pack, list(arg)),
3142 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3143 }
3144
78ca652e
GS		 3145 /* Fake up a require, handle override, if any */
3146 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3147 if (!(gv && GvIMPORTED_CV(gv)))
3148 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3149
3150 if (gv && GvIMPORTED_CV(gv)) {
3151 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3152 append_elem(OP_LIST, id,
3153 scalar(newUNOP(OP_RV2CV, 0,
3154 newGVOP(OP_GV, 0,
3155 gv))))));
3156 }
3157 else {
3158 rqop = newUNOP(OP_REQUIRE, 0, id);
3159 }
a0d0e21e
LW		 3160
3161 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3162 newATTRSUB(floor,
79cb57f6 3163 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3164 Nullop,
09bef843 3165 Nullop,
a0d0e21e 3166 append_elem(OP_LINESEQ,
b1cb66bf 3167 append_elem(OP_LINESEQ,
3168 newSTATEOP(0, Nullch, rqop),
3169 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3170 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3171
c305c6a0 3172 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3173 PL_copline = NOLINE;
3174 PL_expect = XSTATE;
85e6fe83
LW		 3175}
3176
e4783991
GS		 3177void
3178Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3179{
3180 va_list args;
3181 va_start(args, ver);
3182 vload_module(flags, name, ver, &args);
3183 va_end(args);
3184}
3185
3186#ifdef PERL_IMPLICIT_CONTEXT
3187void
3188Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3189{
3190 dTHX;
3191 va_list args;
3192 va_start(args, ver);
3193 vload_module(flags, name, ver, &args);
3194 va_end(args);
3195}
3196#endif
3197
3198void
3199Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3200{
3201 OP *modname, *veop, *imop;
3202
3203 modname = newSVOP(OP_CONST, 0, name);
3204 modname->op_private |= OPpCONST_BARE;
3205 if (ver) {
3206 veop = newSVOP(OP_CONST, 0, ver);
3207 }
3208 else
3209 veop = Nullop;
3210 if (flags & PERL_LOADMOD_NOIMPORT) {
3211 imop = sawparens(newNULLLIST());
3212 }
3213 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3214 imop = va_arg(*args, OP*);
3215 }
3216 else {
3217 SV *sv;
3218 imop = Nullop;
3219 sv = va_arg(*args, SV*);
3220 while (sv) {
3221 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3222 sv = va_arg(*args, SV*);
3223 }
3224 }
3225 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3226 veop, modname, imop);
3227}
3228
79072805 3229OP *
864dbfa3 3230Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3231{
3232 OP *doop;
3233 GV *gv;
3234
3235 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3236 if (!(gv && GvIMPORTED_CV(gv)))
3237 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3238
3239 if (gv && GvIMPORTED_CV(gv)) {
3240 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3241 append_elem(OP_LIST, term,
3242 scalar(newUNOP(OP_RV2CV, 0,
3243 newGVOP(OP_GV, 0,
3244 gv))))));
3245 }
3246 else {
3247 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3248 }
3249 return doop;
3250}
3251
3252OP *
864dbfa3 3253Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3254{
3255 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3256 list(force_list(subscript)),
3257 list(force_list(listval)) );
79072805
LW		 3258}
3259
76e3520e 3260STATIC I32
cea2e8a9 3261S_list_assignment(pTHX_ register OP *o)
79072805 3262{
11343788 3263 if (!o)
79072805
LW		 3264 return TRUE;
3265
11343788
MB		 3266 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3267 o = cUNOPo->op_first;
79072805 3268
11343788 3269 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3270 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3271 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3272
3273 if (t && f)
3274 return TRUE;
3275 if (t || f)
3276 yyerror("Assignment to both a list and a scalar");
3277 return FALSE;
3278 }
3279
11343788
MB		 3280 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3281 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3282 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3283 return TRUE;
3284
11343788 3285 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3286 return TRUE;
3287
11343788 3288 if (o->op_type == OP_RV2SV)
79072805
LW		 3289 return FALSE;
3290
3291 return FALSE;
3292}
3293
3294OP *
864dbfa3 3295Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3296{
11343788 3297 OP *o;
79072805 3298
a0d0e21e
LW		 3299 if (optype) {
3300 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3301 return newLOGOP(optype, 0,
3302 mod(scalar(left), optype),
3303 newUNOP(OP_SASSIGN, 0, scalar(right)));
3304 }
3305 else {
3306 return newBINOP(optype, OPf_STACKED,
3307 mod(scalar(left), optype), scalar(right));
3308 }
3309 }
3310
79072805 3311 if (list_assignment(left)) {
6ee623d5 3312 dTHR;
10c8fecd
GS		 3313 OP *curop;
3314
3280af22
NIS		 3315 PL_modcount = 0;
3316 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3317 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3318 if (PL_eval_start)
3319 PL_eval_start = 0;
748a9306 3320 else {
a0d0e21e
LW		 3321 op_free(left);
3322 op_free(right);
3323 return Nullop;
3324 }
10c8fecd
GS		 3325 curop = list(force_list(left));
3326 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3327 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3328 for (curop = ((LISTOP*)curop)->op_first;
3329 curop; curop = curop->op_sibling)
3330 {
3331 if (curop->op_type == OP_RV2HV &&
3332 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3333 o->op_private |= OPpASSIGN_HASH;
3334 break;
3335 }
3336 }
a0d0e21e 3337 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3338 OP *lastop = o;
3280af22 3339 PL_generation++;
11343788 3340 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3341 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3342 if (curop->op_type == OP_GV) {
638eceb6 3343 GV *gv = cGVOPx_gv(curop);
3280af22 3344 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3345 break;
3280af22 3346 SvCUR(gv) = PL_generation;
79072805 3347 }
748a9306
LW		 3348 else if (curop->op_type == OP_PADSV ||
3349 curop->op_type == OP_PADAV ||
3350 curop->op_type == OP_PADHV ||
3351 curop->op_type == OP_PADANY) {
3280af22 3352 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3353 SV *sv = svp[curop->op_targ];
3280af22 3354 if (SvCUR(sv) == PL_generation)
748a9306 3355 break;
3280af22 3356 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3357 }
79072805
LW		 3358 else if (curop->op_type == OP_RV2CV)
3359 break;
3360 else if (curop->op_type == OP_RV2SV ||
3361 curop->op_type == OP_RV2AV ||
3362 curop->op_type == OP_RV2HV ||
3363 curop->op_type == OP_RV2GV) {
3364 if (lastop->op_type != OP_GV) /* funny deref? */
3365 break;
3366 }
1167e5da
SM		 3367 else if (curop->op_type == OP_PUSHRE) {
3368 if (((PMOP*)curop)->op_pmreplroot) {
3369 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3370 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3371 break;
3280af22 3372 SvCUR(gv) = PL_generation;
1167e5da
SM		 3373 }
3374 }
79072805
LW		 3375 else
3376 break;
3377 }
3378 lastop = curop;
3379 }
11343788 3380 if (curop != o)
10c8fecd 3381 o->op_private |= OPpASSIGN_COMMON;
79072805 3382 }
c07a80fd 3383 if (right && right->op_type == OP_SPLIT) {
3384 OP* tmpop;
3385 if ((tmpop = ((LISTOP*)right)->op_first) &&
3386 tmpop->op_type == OP_PUSHRE)
3387 {
3388 PMOP *pm = (PMOP*)tmpop;
3389 if (left->op_type == OP_RV2AV &&
3390 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3391 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3392 {
3393 tmpop = ((UNOP*)left)->op_first;
3394 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3395#ifdef USE_ITHREADS
3396 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3397 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3398#else
3399 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3400 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3401#endif
c07a80fd 3402 pm->op_pmflags |= PMf_ONCE;
11343788 3403 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3404 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3405 tmpop->op_sibling = Nullop; /* don't free split */
3406 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3407 op_free(o); /* blow off assign */
54310121 3408 right->op_flags &= ~OPf_WANT;
a5f75d66 3409 /* "I don't know and I don't care." */
c07a80fd 3410 return right;
3411 }
3412 }
3413 else {
3280af22 3414 if (PL_modcount < 10000 &&
c07a80fd 3415 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3416 {
3417 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3418 if (SvIVX(sv) == 0)
3280af22 3419 sv_setiv(sv, PL_modcount+1);
c07a80fd 3420 }
3421 }
3422 }
3423 }
11343788 3424 return o;
79072805
LW		 3425 }
3426 if (!right)
3427 right = newOP(OP_UNDEF, 0);
3428 if (right->op_type == OP_READLINE) {
3429 right->op_flags |= OPf_STACKED;
463ee0b2 3430 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3431 }
a0d0e21e 3432 else {
3280af22 3433 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3434 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3435 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3436 if (PL_eval_start)
3437 PL_eval_start = 0;
748a9306 3438 else {
11343788 3439 op_free(o);
a0d0e21e
LW		 3440 return Nullop;
3441 }
3442 }
11343788 3443 return o;
79072805
LW		 3444}
3445
3446OP *
864dbfa3 3447Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3448{
11343788 3449 dTHR;
bbce6d69 3450 U32 seq = intro_my();
79072805
LW		 3451 register COP *cop;
3452
b7dc083c 3453 NewOp(1101, cop, 1, COP);
57843af0 3454 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3455 cop->op_type = OP_DBSTATE;
22c35a8c 3456 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3457 }
3458 else {
3459 cop->op_type = OP_NEXTSTATE;
22c35a8c 3460 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3461 }
79072805 3462 cop->op_flags = flags;
393fec97 3463 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3464#ifdef NATIVE_HINTS
3465 cop->op_private |= NATIVE_HINTS;
3466#endif
e24b16f9 3467 PL_compiling.op_private = cop->op_private;
79072805
LW		 3468 cop->op_next = (OP*)cop;
3469
463ee0b2
LW		 3470 if (label) {
3471 cop->cop_label = label;
3280af22 3472 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3473 }
bbce6d69 3474 cop->cop_seq = seq;
3280af22 3475 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3476 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3477 cop->cop_warnings = PL_curcop->cop_warnings ;
3478 else
3479 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3480
79072805 3481
3280af22 3482 if (PL_copline == NOLINE)
57843af0 3483 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3484 else {
57843af0 3485 CopLINE_set(cop, PL_copline);
3280af22 3486 PL_copline = NOLINE;
79072805 3487 }
57843af0
GS		 3488#ifdef USE_ITHREADS
3489 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3490#else
cc49e20b 3491 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3492#endif
11faa288 3493 CopSTASH_set(cop, PL_curstash);
79072805 3494
3280af22 3495 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3496 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3497 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3498 (void)SvIOK_on(*svp);
57b2e452 3499 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3500 }
3501 }
3502
11343788 3503 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3504}
3505
bbce6d69 3506/* "Introduce" my variables to visible status. */
3507U32
864dbfa3 3508Perl_intro_my(pTHX)
bbce6d69 3509{
3510 SV **svp;
3511 SV *sv;
3512 I32 i;
3513
3280af22
NIS		 3514 if (! PL_min_intro_pending)
3515 return PL_cop_seqmax;
bbce6d69 3516
3280af22
NIS		 3517 svp = AvARRAY(PL_comppad_name);
3518 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3519 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3520 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3521 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3522 }
3523 }
3280af22
NIS		 3524 PL_min_intro_pending = 0;
3525 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3526 return PL_cop_seqmax++;
bbce6d69 3527}
3528
79072805 3529OP *
864dbfa3 3530Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3531{
883ffac3
CS		 3532 return new_logop(type, flags, &first, &other);
3533}
3534
3bd495df 3535STATIC OP *
cea2e8a9 3536S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3537{
11343788 3538 dTHR;
79072805 3539 LOGOP *logop;
11343788 3540 OP *o;
883ffac3
CS		 3541 OP *first = *firstp;
3542 OP *other = *otherp;
79072805 3543
a0d0e21e
LW		 3544 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3545 return newBINOP(type, flags, scalar(first), scalar(other));
3546
8990e307 3547 scalarboolean(first);
79072805
LW		 3548 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3549 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3550 if (type == OP_AND || type == OP_OR) {
3551 if (type == OP_AND)
3552 type = OP_OR;
3553 else
3554 type = OP_AND;
11343788 3555 o = first;
883ffac3 3556 first = *firstp = cUNOPo->op_first;
11343788
MB		 3557 if (o->op_next)
3558 first->op_next = o->op_next;
3559 cUNOPo->op_first = Nullop;
3560 op_free(o);
79072805
LW		 3561 }
3562 }
3563 if (first->op_type == OP_CONST) {
4673fc70 3564 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
e476b1b5 3565 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3566 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3567 op_free(first);
883ffac3 3568 *firstp = Nullop;
79072805
LW		 3569 return other;
3570 }
3571 else {
3572 op_free(other);
883ffac3 3573 *otherp = Nullop;
79072805
LW		 3574 return first;
3575 }
3576 }
3577 else if (first->op_type == OP_WANTARRAY) {
3578 if (type == OP_AND)
3579 list(other);
3580 else
3581 scalar(other);
3582 }
e476b1b5 3583 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3584 OP *k1 = ((UNOP*)first)->op_first;
3585 OP *k2 = k1->op_sibling;
3586 OPCODE warnop = 0;
3587 switch (first->op_type)
3588 {
3589 case OP_NULL:
3590 if (k2 && k2->op_type == OP_READLINE
3591 && (k2->op_flags & OPf_STACKED)
55d729e4 3592 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3593 {
a6006777 3594 warnop = k2->op_type;
72b16652 3595 }
a6006777 3596 break;
3597
3598 case OP_SASSIGN:
68dc0745 3599 if (k1->op_type == OP_READDIR
3600 || k1->op_type == OP_GLOB
72b16652 3601 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3602 || k1->op_type == OP_EACH)
72b16652
GS		 3603 {
3604 warnop = ((k1->op_type == OP_NULL)
3605 ? k1->op_targ : k1->op_type);
3606 }
a6006777 3607 break;
3608 }
8ebc5c01 3609 if (warnop) {
57843af0
GS		 3610 line_t oldline = CopLINE(PL_curcop);
3611 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3612 Perl_warner(aTHX_ WARN_MISC,
599cee73 3613 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3614 PL_op_desc[warnop],
68dc0745 3615 ((warnop == OP_READLINE || warnop == OP_GLOB)
3616 ? " construct" : "() operator"));
57843af0 3617 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3618 }
a6006777 3619 }
79072805
LW		 3620
3621 if (!other)
3622 return first;
3623
a0d0e21e
LW		 3624 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3625 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3626
b7dc083c 3627 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3628
3629 logop->op_type = type;
22c35a8c 3630 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3631 logop->op_first = first;
3632 logop->op_flags = flags | OPf_KIDS;
3633 logop->op_other = LINKLIST(other);
c07a80fd 3634 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3635
3636 /* establish postfix order */
3637 logop->op_next = LINKLIST(first);
3638 first->op_next = (OP*)logop;
3639 first->op_sibling = other;
3640
11343788
MB		 3641 o = newUNOP(OP_NULL, 0, (OP*)logop);
3642 other->op_next = o;
79072805 3643
11343788 3644 return o;
79072805
LW		 3645}
3646
3647OP *
864dbfa3 3648Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3649{
11343788 3650 dTHR;
1a67a97c
SM		 3651 LOGOP *logop;
3652 OP *start;
11343788 3653 OP *o;
79072805 3654
b1cb66bf 3655 if (!falseop)
3656 return newLOGOP(OP_AND, 0, first, trueop);
3657 if (!trueop)
3658 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3659
8990e307 3660 scalarboolean(first);
79072805
LW		 3661 if (first->op_type == OP_CONST) {
3662 if (SvTRUE(((SVOP*)first)->op_sv)) {
3663 op_free(first);
b1cb66bf 3664 op_free(falseop);
3665 return trueop;
79072805
LW		 3666 }
3667 else {
3668 op_free(first);
b1cb66bf 3669 op_free(trueop);
3670 return falseop;
79072805
LW		 3671 }
3672 }
3673 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3674 list(trueop);
3675 scalar(falseop);
79072805 3676 }
1a67a97c
SM		 3677 NewOp(1101, logop, 1, LOGOP);
3678 logop->op_type = OP_COND_EXPR;
3679 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3680 logop->op_first = first;
3681 logop->op_flags = flags | OPf_KIDS;
3682 logop->op_private = 1 | (flags >> 8);
3683 logop->op_other = LINKLIST(trueop);
3684 logop->op_next = LINKLIST(falseop);
79072805 3685
79072805
LW		 3686
3687 /* establish postfix order */
1a67a97c
SM		 3688 start = LINKLIST(first);
3689 first->op_next = (OP*)logop;
79072805 3690
b1cb66bf 3691 first->op_sibling = trueop;
3692 trueop->op_sibling = falseop;
1a67a97c 3693 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3694
1a67a97c 3695 trueop->op_next = falseop->op_next = o;
79072805 3696
1a67a97c 3697 o->op_next = start;
11343788 3698 return o;
79072805
LW		 3699}
3700
3701OP *
864dbfa3 3702Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3703{
b35b2403 3704 dTHR;
1a67a97c 3705 LOGOP *range;
79072805
LW		 3706 OP *flip;
3707 OP *flop;
1a67a97c 3708 OP *leftstart;
11343788 3709 OP *o;
79072805 3710
1a67a97c 3711 NewOp(1101, range, 1, LOGOP);
79072805 3712
1a67a97c
SM		 3713 range->op_type = OP_RANGE;
3714 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3715 range->op_first = left;
3716 range->op_flags = OPf_KIDS;
3717 leftstart = LINKLIST(left);
3718 range->op_other = LINKLIST(right);
3719 range->op_private = 1 | (flags >> 8);
79072805
LW		 3720
3721 left->op_sibling = right;
3722
1a67a97c
SM		 3723 range->op_next = (OP*)range;
3724 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3725 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3726 o = newUNOP(OP_NULL, 0, flop);
79072805 3727 linklist(flop);
1a67a97c 3728 range->op_next = leftstart;
79072805
LW		 3729
3730 left->op_next = flip;
3731 right->op_next = flop;
3732
1a67a97c
SM		 3733 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3734 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3735 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3736 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3737
3738 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3739 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3740
11343788 3741 flip->op_next = o;
79072805 3742 if (!flip->op_private || !flop->op_private)
11343788 3743 linklist(o); /* blow off optimizer unless constant */
79072805 3744
11343788 3745 return o;
79072805
LW		 3746}
3747
3748OP *
864dbfa3 3749Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3750{
11343788 3751 dTHR;
463ee0b2 3752 OP* listop;
11343788 3753 OP* o;
463ee0b2 3754 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3755 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3756
463ee0b2
LW		 3757 if (expr) {
3758 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3759 return block; /* do {} while 0 does once */
fb73857a 3760 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3761 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3762 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3763 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3764 } else if (expr->op_flags & OPf_KIDS) {
3765 OP *k1 = ((UNOP*)expr)->op_first;
3766 OP *k2 = (k1) ? k1->op_sibling : NULL;
3767 switch (expr->op_type) {
3768 case OP_NULL:
3769 if (k2 && k2->op_type == OP_READLINE
3770 && (k2->op_flags & OPf_STACKED)
3771 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3772 expr = newUNOP(OP_DEFINED, 0, expr);
3773 break;
3774
3775 case OP_SASSIGN:
3776 if (k1->op_type == OP_READDIR
3777 || k1->op_type == OP_GLOB
72b16652 3778 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3779 || k1->op_type == OP_EACH)
3780 expr = newUNOP(OP_DEFINED, 0, expr);
3781 break;
3782 }
774d564b 3783 }
463ee0b2 3784 }
93a17b20 3785
8990e307 3786 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3787 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3788
883ffac3
CS		 3789 if (listop)
3790 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3791
11343788
MB		 3792 if (once && o != listop)
3793 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3794
11343788
MB		 3795 if (o == listop)
3796 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3797
11343788
MB		 3798 o->op_flags |= flags;
3799 o = scope(o);
3800 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3801 return o;
79072805
LW		 3802}
3803
3804OP *
864dbfa3 3805Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3806{
11343788 3807 dTHR;
79072805
LW		 3808 OP *redo;
3809 OP *next = 0;
3810 OP *listop;
11343788 3811 OP *o;
79072805 3812 OP *condop;
1ba6ee2b 3813 U8 loopflags = 0;
79072805 3814
fb73857a 3815 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3816 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3817 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3818 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3819 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3820 OP *k1 = ((UNOP*)expr)->op_first;
3821 OP *k2 = (k1) ? k1->op_sibling : NULL;
3822 switch (expr->op_type) {
3823 case OP_NULL:
3824 if (k2 && k2->op_type == OP_READLINE
3825 && (k2->op_flags & OPf_STACKED)
3826 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3827 expr = newUNOP(OP_DEFINED, 0, expr);
3828 break;
3829
3830 case OP_SASSIGN:
3831 if (k1->op_type == OP_READDIR
3832 || k1->op_type == OP_GLOB
72b16652 3833 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3834 || k1->op_type == OP_EACH)
3835 expr = newUNOP(OP_DEFINED, 0, expr);
3836 break;
3837 }
748a9306 3838 }
79072805
LW		 3839
3840 if (!block)
3841 block = newOP(OP_NULL, 0);
87246558
GS		 3842 else if (cont) {
3843 block = scope(block);
3844 }
79072805 3845
1ba6ee2b 3846 if (cont) {
79072805 3847 next = LINKLIST(cont);
1ba6ee2b
GS		 3848 loopflags |= OPpLOOP_CONTINUE;
3849 }
fb73857a 3850 if (expr) {
79072805 3851 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3852 if ((line_t)whileline != NOLINE) {
3280af22 3853 PL_copline = whileline;
fb73857a 3854 cont = append_elem(OP_LINESEQ, cont,
3855 newSTATEOP(0, Nullch, Nullop));
3856 }
3857 }
79072805 3858
463ee0b2 3859 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3860 redo = LINKLIST(listop);
3861
3862 if (expr) {
3280af22 3863 PL_copline = whileline;
883ffac3
CS		 3864 scalar(listop);
3865 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3866 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3867 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3868 op_free((OP*)loop);
883ffac3 3869 return Nullop; /* listop already freed by new_logop */
463ee0b2 3870 }
883ffac3
CS		 3871 if (listop)
3872 ((LISTOP*)listop)->op_last->op_next = condop =
3873 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3874 if (!next)
3875 next = condop;
3876 }
3877 else
11343788 3878 o = listop;
79072805
LW		 3879
3880 if (!loop) {
b7dc083c 3881 NewOp(1101,loop,1,LOOP);
79072805 3882 loop->op_type = OP_ENTERLOOP;
22c35a8c 3883 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3884 loop->op_private = 0;
3885 loop->op_next = (OP*)loop;
3886 }
3887
11343788 3888 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3889
3890 loop->op_redoop = redo;
11343788 3891 loop->op_lastop = o;
1ba6ee2b 3892 o->op_private |= loopflags;
79072805
LW		 3893
3894 if (next)
3895 loop->op_nextop = next;
3896 else
11343788 3897 loop->op_nextop = o;
79072805 3898
11343788
MB		 3899 o->op_flags |= flags;
3900 o->op_private |= (flags >> 8);
3901 return o;
79072805
LW		 3902}
3903
3904OP *
864dbfa3 3905Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3906{
3907 LOOP *loop;
fb73857a 3908 OP *wop;
85e6fe83 3909 int padoff = 0;
4633a7c4 3910 I32 iterflags = 0;
79072805 3911
79072805 3912 if (sv) {
85e6fe83 3913 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3914 sv->op_type = OP_RV2GV;
22c35a8c 3915 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3916 }
85e6fe83
LW		 3917 else if (sv->op_type == OP_PADSV) { /* private variable */
3918 padoff = sv->op_targ;
743e66e6 3919 sv->op_targ = 0;
85e6fe83
LW		 3920 op_free(sv);
3921 sv = Nullop;
3922 }
54b9620d
MB		 3923 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3924 padoff = sv->op_targ;
743e66e6 3925 sv->op_targ = 0;
54b9620d
MB		 3926 iterflags |= OPf_SPECIAL;
3927 op_free(sv);
3928 sv = Nullop;
3929 }
79072805 3930 else
cea2e8a9 3931 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3932 }
3933 else {
54b9620d
MB		 3934#ifdef USE_THREADS
3935 padoff = find_threadsv("_");
3936 iterflags |= OPf_SPECIAL;
3937#else
3280af22 3938 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3939#endif
79072805 3940 }
5f05dabc 3941 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3942 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3943 iterflags |= OPf_STACKED;
3944 }
89ea2908
GA		 3945 else if (expr->op_type == OP_NULL &&
3946 (expr->op_flags & OPf_KIDS) &&
3947 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3948 {
3949 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3950 * set the STACKED flag to indicate that these values are to be
3951 * treated as min/max values by 'pp_iterinit'.
3952 */
3953 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3954 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3955 OP* left = range->op_first;
3956 OP* right = left->op_sibling;
5152d7c7 3957 LISTOP* listop;
89ea2908
GA		 3958
3959 range->op_flags &= ~OPf_KIDS;
3960 range->op_first = Nullop;
3961
5152d7c7 3962 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3963 listop->op_first->op_next = range->op_next;
3964 left->op_next = range->op_other;
5152d7c7
GS		 3965 right->op_next = (OP*)listop;
3966 listop->op_next = listop->op_first;
89ea2908
GA		 3967
3968 op_free(expr);
5152d7c7 3969 expr = (OP*)(listop);
89ea2908
GA		 3970 null(expr);
3971 iterflags |= OPf_STACKED;
3972 }
3973 else {
3974 expr = mod(force_list(expr), OP_GREPSTART);
3975 }
3976
3977
4633a7c4 3978 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3979 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3980 assert(!loop->op_next);
b7dc083c 3981#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 3982 {
3983 LOOP *tmp;
3984 NewOp(1234,tmp,1,LOOP);
3985 Copy(loop,tmp,1,LOOP);
3986 loop = tmp;
3987 }
b7dc083c 3988#else
85e6fe83 3989 Renew(loop, 1, LOOP);
b7dc083c 3990#endif
85e6fe83 3991 loop->op_targ = padoff;
fb73857a 3992 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3993 PL_copline = forline;
fb73857a 3994 return newSTATEOP(0, label, wop);
79072805
LW		 3995}
3996
8990e307 3997OP*
864dbfa3 3998Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3999{
11343788
MB		 4000 dTHR;
4001 OP *o;
2d8e6c8d
GS		 4002 STRLEN n_a;
4003
8990e307 4004 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4005 /* "last()" means "last" */
4006 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4007 o = newOP(type, OPf_SPECIAL);
4008 else {
4009 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4010 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4011 : ""));
4012 }
8990e307
LW		 4013 op_free(label);
4014 }
4015 else {
a0d0e21e
LW		 4016 if (label->op_type == OP_ENTERSUB)
4017 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4018 o = newUNOP(type, OPf_STACKED, label);
8990e307 4019 }
3280af22 4020 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4021 return o;
8990e307
LW		 4022}
4023
79072805 4024void
864dbfa3 4025Perl_cv_undef(pTHX_ CV *cv)
79072805 4026{
11343788
MB		 4027 dTHR;
4028#ifdef USE_THREADS
e858de61
MB		 4029 if (CvMUTEXP(cv)) {
4030 MUTEX_DESTROY(CvMUTEXP(cv));
4031 Safefree(CvMUTEXP(cv));
4032 CvMUTEXP(cv) = 0;
4033 }
11343788
MB		 4034#endif /* USE_THREADS */
4035
a0d0e21e 4036 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4037#ifdef USE_THREADS
4038 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4039 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4040#else
a0d0e21e 4041 if (CvDEPTH(cv))
cea2e8a9 4042 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4043#endif /* USE_THREADS */
8990e307 4044 ENTER;
a0d0e21e 4045
7766f137 4046 SAVEVPTR(PL_curpad);
3280af22 4047 PL_curpad = 0;
a0d0e21e 4048
a5f75d66 4049 if (!CvCLONED(cv))
748a9306 4050 op_free(CvROOT(cv));
79072805 4051 CvROOT(cv) = Nullop;
8990e307 4052 LEAVE;
79072805 4053 }
1d5db326 4054 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4055 CvFLAGS(cv) = 0;
8e07c86e
AD		 4056 SvREFCNT_dec(CvGV(cv));
4057 CvGV(cv) = Nullgv;
4058 SvREFCNT_dec(CvOUTSIDE(cv));
4059 CvOUTSIDE(cv) = Nullcv;
4060 if (CvPADLIST(cv)) {
8ebc5c01 4061 /* may be during global destruction */
4062 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4063 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4064 while (i >= 0) {
4065 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4066 SV* sv = svp ? *svp : Nullsv;
4067 if (!sv)
4068 continue;
3280af22
NIS		 4069 if (sv == (SV*)PL_comppad_name)
4070 PL_comppad_name = Nullav;
4071 else if (sv == (SV*)PL_comppad) {
4072 PL_comppad = Nullav;
4073 PL_curpad = Null(SV**);
46fc3d4c 4074 }
4075 SvREFCNT_dec(sv);
8ebc5c01 4076 }
4077 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4078 }
8e07c86e
AD		 4079 CvPADLIST(cv) = Nullav;
4080 }
79072805
LW		 4081}
4082
76e3520e 4083STATIC void
743e66e6 4084S_cv_dump(pTHX_ CV *cv)
5f05dabc 4085{
62fde642 4086#ifdef DEBUGGING
5f05dabc 4087 CV *outside = CvOUTSIDE(cv);
4088 AV* padlist = CvPADLIST(cv);
4fdae800 4089 AV* pad_name;
4090 AV* pad;
4091 SV** pname;
4092 SV** ppad;
5f05dabc 4093 I32 ix;
4094
b900a521
JH		 4095 PerlIO_printf(Perl_debug_log,
4096 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4097 PTR2UV(cv),
ab50184a 4098 (CvANON(cv) ? "ANON"
6b88bc9c 4099 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4100 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4101 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4102 PTR2UV(outside),
ab50184a
CS		 4103 (!outside ? "null"
4104 : CvANON(outside) ? "ANON"
6b88bc9c 4105 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4106 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4107 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4108
4fdae800 4109 if (!padlist)
4110 return;
4111
4112 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4113 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4114 pname = AvARRAY(pad_name);
4115 ppad = AvARRAY(pad);
4116
93965878 4117 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4118 if (SvPOK(pname[ix]))
b900a521
JH		 4119 PerlIO_printf(Perl_debug_log,
4120 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4121 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4122 SvFAKE(pname[ix]) ? "FAKE " : "",
4123 SvPVX(pname[ix]),
b900a521
JH		 4124 (IV)I_32(SvNVX(pname[ix])),
4125 SvIVX(pname[ix]));
5f05dabc 4126 }
743e66e6 4127#endif /* DEBUGGING */
62fde642 4128}
5f05dabc 4129
76e3520e 4130STATIC CV *
cea2e8a9 4131S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4132{
11343788 4133 dTHR;
748a9306
LW		 4134 AV* av;
4135 I32 ix;
4136 AV* protopadlist = CvPADLIST(proto);
4137 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4138 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4139 SV** pname = AvARRAY(protopad_name);
4140 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4141 I32 fname = AvFILLp(protopad_name);
4142 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4143 AV* comppadlist;
4144 CV* cv;
4145
07055b4c
CS		 4146 assert(!CvUNIQUE(proto));
4147
748a9306 4148 ENTER;
354992b1 4149 SAVECOMPPAD();
3280af22
NIS		 4150 SAVESPTR(PL_comppad_name);
4151 SAVESPTR(PL_compcv);
748a9306 4152
3280af22 4153 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4154 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 4155 CvCLONED_on(cv);
5f05dabc 4156 if (CvANON(proto))
4157 CvANON_on(cv);
748a9306 4158
11343788 4159#ifdef USE_THREADS
12ca11f6 4160 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4161 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4162 CvOWNER(cv) = 0;
4163#endif /* USE_THREADS */
57843af0 4164 CvFILE(cv) = CvFILE(proto);
44a8e56a 4165 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4166 CvSTASH(cv) = CvSTASH(proto);
4167 CvROOT(cv) = CvROOT(proto);
4168 CvSTART(cv) = CvSTART(proto);
5f05dabc 4169 if (outside)
4170 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4171
68dc0745 4172 if (SvPOK(proto))
4173 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4174
3280af22 4175 PL_comppad_name = newAV();
46fc3d4c 4176 for (ix = fname; ix >= 0; ix--)
3280af22 4177 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4178
3280af22 4179 PL_comppad = newAV();
748a9306
LW		 4180
4181 comppadlist = newAV();
4182 AvREAL_off(comppadlist);
3280af22
NIS		 4183 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4184 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4185 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4186 av_fill(PL_comppad, AvFILLp(protopad));
4187 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4188
4189 av = newAV(); /* will be @_ */
4190 av_extend(av, 0);
3280af22 4191 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4192 AvFLAGS(av) = AVf_REIFY;
4193
9607fc9c 4194 for (ix = fpad; ix > 0; ix--) {
4195 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4196 if (namesv && namesv != &PL_sv_undef) {
aa689395 4197 char *name = SvPVX(namesv); /* XXX */
4198 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4199 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4200 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4201 if (!off)
3280af22 4202 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4203 else if (off != ix)
cea2e8a9 4204 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4205 }
4206 else { /* our own lexical */
aa689395 4207 SV* sv;
5f05dabc 4208 if (*name == '&') {
4209 /* anon code -- we'll come back for it */
4210 sv = SvREFCNT_inc(ppad[ix]);
4211 }
4212 else if (*name == '@')
4213 sv = (SV*)newAV();
748a9306 4214 else if (*name == '%')
5f05dabc 4215 sv = (SV*)newHV();
748a9306 4216 else
5f05dabc 4217 sv = NEWSV(0,0);
4218 if (!SvPADBUSY(sv))
4219 SvPADMY_on(sv);
3280af22 4220 PL_curpad[ix] = sv;
748a9306
LW		 4221 }
4222 }
7766f137 4223 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4224 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4225 }
748a9306 4226 else {
aa689395 4227 SV* sv = NEWSV(0,0);
748a9306 4228 SvPADTMP_on(sv);
3280af22 4229 PL_curpad[ix] = sv;
748a9306
LW		 4230 }
4231 }
4232
5f05dabc 4233 /* Now that vars are all in place, clone nested closures. */
4234
9607fc9c 4235 for (ix = fpad; ix > 0; ix--) {
4236 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4237 if (namesv
3280af22 4238 && namesv != &PL_sv_undef
aa689395 4239 && !(SvFLAGS(namesv) & SVf_FAKE)
4240 && *SvPVX(namesv) == '&'
5f05dabc 4241 && CvCLONE(ppad[ix]))
4242 {
4243 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4244 SvREFCNT_dec(ppad[ix]);
4245 CvCLONE_on(kid);
4246 SvPADMY_on(kid);
3280af22 4247 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4248 }
4249 }
4250
5f05dabc 4251#ifdef DEBUG_CLOSURES
ab50184a
CS		 4252 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4253 cv_dump(outside);
4254 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4255 cv_dump(proto);
ab50184a 4256 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4257 cv_dump(cv);
4258#endif
4259
748a9306
LW		 4260 LEAVE;
4261 return cv;
4262}
4263
4264CV *
864dbfa3 4265Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4266{
b099ddc0 4267 CV *cv;
1feb2720 4268 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4269 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4270 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4271 return cv;
5f05dabc 4272}
4273
3fe9a6f1 4274void
864dbfa3 4275Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4276{
0453d815
PM		 4277 dTHR;
4278
e476b1b5 4279 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4280 SV* msg = sv_newmortal();
3fe9a6f1 4281 SV* name = Nullsv;
4282
4283 if (gv)
46fc3d4c 4284 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4285 sv_setpv(msg, "Prototype mismatch:");
4286 if (name)
894356b3 4287 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4288 if (SvPOK(cv))
cea2e8a9 4289 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4290 sv_catpv(msg, " vs ");
4291 if (p)
cea2e8a9 4292 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4293 else
4294 sv_catpv(msg, "none");
e476b1b5 4295 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4296 }
4297}
4298
760ac839 4299SV *
864dbfa3 4300Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4301{
54310121 4302 if (!cv || !SvPOK(cv) || SvCUR(cv))
4303 return Nullsv;
fe5e78ed
GS		 4304 return op_const_sv(CvSTART(cv), cv);
4305}
760ac839 4306
fe5e78ed 4307SV *
864dbfa3 4308Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4309{
4310 SV *sv = Nullsv;
4311
0f79a09d 4312 if (!o)
fe5e78ed
GS		 4313 return Nullsv;
4314
0f79a09d 4315 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4316 o = cLISTOPo->op_first->op_sibling;
4317
4318 for (; o; o = o->op_next) {
54310121 4319 OPCODE type = o->op_type;
fe5e78ed 4320
acb36ea4 4321 if (sv && o->op_next == o)
fe5e78ed 4322 return sv;
54310121 4323 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4324 continue;
4325 if (type == OP_LEAVESUB || type == OP_RETURN)
4326 break;
4327 if (sv)
4328 return Nullsv;
7766f137 4329 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4330 sv = cSVOPo->op_sv;
7766f137 4331 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4332 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4333 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4334 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4335 return Nullsv;
760ac839 4336 }
54310121 4337 else
4338 return Nullsv;
760ac839 4339 }
5aabfad6 4340 if (sv)
4341 SvREADONLY_on(sv);
760ac839
LW		 4342 return sv;
4343}
4344
09bef843
SB		 4345void
4346Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4347{
4348 if (o)
4349 SAVEFREEOP(o);
4350 if (proto)
4351 SAVEFREEOP(proto);
4352 if (attrs)
4353 SAVEFREEOP(attrs);
4354 if (block)
4355 SAVEFREEOP(block);
4356 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4357}
4358
748a9306 4359CV *
864dbfa3 4360Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4361{
09bef843
SB		 4362 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4363}
4364
4365CV *
4366Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4367{
11343788 4368 dTHR;
2d8e6c8d 4369 STRLEN n_a;
83ee9e09
GS		 4370 char *name;
4371 char *aname;
4372 GV *gv;
2d8e6c8d 4373 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4374 register CV *cv=0;
a0d0e21e 4375 I32 ix;
79072805 4376
83ee9e09
GS		 4377 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4378 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4379 SV *sv = sv_newmortal();
4380 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4381 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4382 aname = SvPVX(sv);
4383 }
4384 else
4385 aname = Nullch;
4386 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4387 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4388 SVt_PVCV);
4389
11343788 4390 if (o)
5dc0d613 4391 SAVEFREEOP(o);
3fe9a6f1 4392 if (proto)
4393 SAVEFREEOP(proto);
09bef843
SB		 4394 if (attrs)
4395 SAVEFREEOP(attrs);
3fe9a6f1 4396
09bef843 4397 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4398 maximum a prototype before. */
4399 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4400 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4401 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4402 {
e476b1b5 4403 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4404 }
55d729e4
GS		 4405 cv_ckproto((CV*)gv, NULL, ps);
4406 }
4407 if (ps)
4408 sv_setpv((SV*)gv, ps);
4409 else
4410 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4411 SvREFCNT_dec(PL_compcv);
4412 cv = PL_compcv = NULL;
4413 PL_sub_generation++;
55d729e4
GS		 4414 goto noblock;
4415 }
4416
68dc0745 4417 if (!name || GvCVGEN(gv))
4418 cv = Nullcv;
155aba94 4419 else if ((cv = GvCV(gv))) {
3fe9a6f1 4420 cv_ckproto(cv, gv, ps);
68dc0745 4421 /* already defined (or promised)? */
4422 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4423 SV* const_sv;
fe5e78ed 4424 bool const_changed = TRUE;
09bef843 4425 if (!block && !attrs) {
aa689395 4426 /* just a "sub foo;" when &foo is already defined */
3280af22 4427 SAVEFREESV(PL_compcv);
aa689395 4428 goto done;
4429 }
7bac28a0 4430 /* ahem, death to those who redefine active sort subs */
3280af22 4431 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4432 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4433 if (!block)
4434 goto withattrs;
155aba94 4435 if ((const_sv = cv_const_sv(cv)))
fe5e78ed 4436 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
e476b1b5 4437 if ((const_sv || const_changed) && ckWARN(WARN_REDEFINE))
83ee9e09 4438 {
57843af0
GS		 4439 line_t oldline = CopLINE(PL_curcop);
4440 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4441 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4442 const_sv ? "Constant subroutine %s redefined"
09bef843 4443 : "Subroutine %s redefined", name);
57843af0 4444 CopLINE_set(PL_curcop, oldline);
79072805 4445 }
8990e307 4446 SvREFCNT_dec(cv);
68dc0745 4447 cv = Nullcv;
79072805
LW		 4448 }
4449 }
09bef843
SB		 4450 withattrs:
4451 if (attrs) {
4452 HV *stash;
4453 SV *rcv;
4454
4455 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4456 * before we clobber PL_compcv.
4457 */
4458 if (cv && !block) {
4459 rcv = (SV*)cv;
4460 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4461 stash = GvSTASH(CvGV(cv));
4462 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4463 stash = CvSTASH(cv);
4464 else
4465 stash = PL_curstash;
4466 }
4467 else {
4468 /* possibly about to re-define existing subr -- ignore old cv */
4469 rcv = (SV*)PL_compcv;
4470 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4471 stash = GvSTASH(gv);
4472 else
4473 stash = PL_curstash;
4474 }
4475 apply_attrs(stash, rcv, attrs);
4476 }
a0d0e21e 4477 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4478 if (!block) {
4479 /* got here with just attrs -- work done, so bug out */
4480 SAVEFREESV(PL_compcv);
4481 goto done;
4482 }
4633a7c4 4483 cv_undef(cv);
3280af22
NIS		 4484 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4485 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4486 CvOUTSIDE(PL_compcv) = 0;
4487 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4488 CvPADLIST(PL_compcv) = 0;
4489 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4490 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4491 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4492 }
4493 else {
3280af22 4494 cv = PL_compcv;
44a8e56a 4495 if (name) {
4496 GvCV(gv) = cv;
4497 GvCVGEN(gv) = 0;
3280af22 4498 PL_sub_generation++;
44a8e56a 4499 }
a0d0e21e 4500 }
44a8e56a 4501 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4502 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4503 CvSTASH(cv) = PL_curstash;
11343788
MB		 4504#ifdef USE_THREADS
4505 CvOWNER(cv) = 0;
1cfa4ec7 4506 if (!CvMUTEXP(cv)) {
f6aaf501 4507 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4508 MUTEX_INIT(CvMUTEXP(cv));
4509 }
11343788 4510#endif /* USE_THREADS */
8990e307 4511
3fe9a6f1 4512 if (ps)
4513 sv_setpv((SV*)cv, ps);
4633a7c4 4514
3280af22 4515 if (PL_error_count) {
c07a80fd 4516 op_free(block);
4517 block = Nullop;
68dc0745 4518 if (name) {
4519 char *s = strrchr(name, ':');
4520 s = s ? s+1 : name;
6d4c2119
CS		 4521 if (strEQ(s, "BEGIN")) {
4522 char *not_safe =
4523 "BEGIN not safe after errors--compilation aborted";
faef0170 4524 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4525 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4526 else {
4527 /* force display of errors found but not reported */
38a03e6e 4528 sv_catpv(ERRSV, not_safe);
cea2e8a9 4529 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4530 }
4531 }
68dc0745 4532 }
c07a80fd 4533 }
a0d0e21e 4534 if (!block) {
55d729e4 4535 noblock:
3280af22 4536 PL_copline = NOLINE;
a0d0e21e
LW		 4537 LEAVE_SCOPE(floor);
4538 return cv;
4539 }
4540
3280af22
NIS		 4541 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4542 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4543
7766f137
GS		 4544 if (CvLVALUE(cv)) {
4545 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4546 }
4547 else {
4548 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4549 }
4550 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4551 OpREFCNT_set(CvROOT(cv), 1);
4552 CvSTART(cv) = LINKLIST(CvROOT(cv));
4553 CvROOT(cv)->op_next = 0;
4554 peep(CvSTART(cv));
4555
4556 /* now that optimizer has done its work, adjust pad values */
54310121 4557 if (CvCLONE(cv)) {
3280af22
NIS		 4558 SV **namep = AvARRAY(PL_comppad_name);
4559 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4560 SV *namesv;
4561
7766f137 4562 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4563 continue;
4564 /*
4565 * The only things that a clonable function needs in its
4566 * pad are references to outer lexicals and anonymous subs.
4567 * The rest are created anew during cloning.
4568 */
4569 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4570 namesv != &PL_sv_undef &&
54310121 4571 (SvFAKE(namesv) ||
4572 *SvPVX(namesv) == '&')))
4573 {
3280af22
NIS		 4574 SvREFCNT_dec(PL_curpad[ix]);
4575 PL_curpad[ix] = Nullsv;
54310121 4576 }
4577 }
a0d0e21e 4578 }
54310121 4579 else {
4580 AV *av = newAV(); /* Will be @_ */
4581 av_extend(av, 0);
3280af22 4582 av_store(PL_comppad, 0, (SV*)av);
54310121 4583 AvFLAGS(av) = AVf_REIFY;
79072805 4584
3280af22 4585 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4586 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4587 continue;
3280af22
NIS		 4588 if (!SvPADMY(PL_curpad[ix]))
4589 SvPADTMP_on(PL_curpad[ix]);
54310121 4590 }
4591 }
79072805 4592
83ee9e09 4593 if (name || aname) {
44a8e56a 4594 char *s;
83ee9e09 4595 char *tname = (name ? name : aname);
44a8e56a 4596
3280af22 4597 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4598 SV *sv = NEWSV(0,0);
44a8e56a 4599 SV *tmpstr = sv_newmortal();
549bb64a 4600 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4601 CV *pcv;
44a8e56a 4602 HV *hv;
4603
ed094faf
GS		 4604 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4605 CopFILE(PL_curcop),
cc49e20b 4606 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4607 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4608 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4609 hv = GvHVn(db_postponed);
9607fc9c 4610 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4611 && (pcv = GvCV(db_postponed)))
4612 {
44a8e56a 4613 dSP;
924508f0 4614 PUSHMARK(SP);
44a8e56a 4615 XPUSHs(tmpstr);
4616 PUTBACK;
83ee9e09 4617 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4618 }
4619 }
79072805 4620
83ee9e09 4621 if ((s = strrchr(tname,':')))
28757baa 4622 s++;
4623 else
83ee9e09 4624 s = tname;
ed094faf 4625
7d30b5c4 4626 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4627 goto done;
4628
68dc0745 4629 if (strEQ(s, "BEGIN")) {
3280af22 4630 I32 oldscope = PL_scopestack_ix;
28757baa 4631 ENTER;
57843af0
GS		 4632 SAVECOPFILE(&PL_compiling);
4633 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4634 save_svref(&PL_rs);
4635 sv_setsv(PL_rs, PL_nrs);
28757baa 4636
3280af22
NIS		 4637 if (!PL_beginav)
4638 PL_beginav = newAV();
28757baa 4639 DEBUG_x( dump_sub(gv) );
ed094faf 4640 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4641 GvCV(gv) = 0;
3280af22 4642 call_list(oldscope, PL_beginav);
a6006777 4643
3280af22 4644 PL_curcop = &PL_compiling;
a0ed51b3 4645 PL_compiling.op_private = PL_hints;
28757baa 4646 LEAVE;
4647 }
3280af22
NIS		 4648 else if (strEQ(s, "END") && !PL_error_count) {
4649 if (!PL_endav)
4650 PL_endav = newAV();
ed094faf 4651 DEBUG_x( dump_sub(gv) );
3280af22 4652 av_unshift(PL_endav, 1);
ed094faf 4653 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4654 GvCV(gv) = 0;
4655 }
7d30b5c4
GS		 4656 else if (strEQ(s, "CHECK") && !PL_error_count) {
4657 if (!PL_checkav)
4658 PL_checkav = newAV();
ed094faf 4659 DEBUG_x( dump_sub(gv) );
7d30b5c4
GS		 4660 av_unshift(PL_checkav, 1);
4661 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4662 GvCV(gv) = 0;
4663 }
3280af22
NIS		 4664 else if (strEQ(s, "INIT") && !PL_error_count) {
4665 if (!PL_initav)
4666 PL_initav = newAV();
ed094faf 4667 DEBUG_x( dump_sub(gv) );
3280af22 4668 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4669 GvCV(gv) = 0;
ae77835f 4670 }
79072805 4671 }
a6006777 4672
aa689395 4673 done:
3280af22 4674 PL_copline = NOLINE;
8990e307 4675 LEAVE_SCOPE(floor);
a0d0e21e 4676 return cv;
79072805
LW		 4677}
4678
b099ddc0 4679/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4680/*
4681=for apidoc newCONSTSUB
4682
4683Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4684eligible for inlining at compile-time.
4685
4686=cut
4687*/
4688
5476c433 4689void
864dbfa3 4690Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4691{
4692 dTHR;
5476c433 4693
11faa288
GS		 4694 ENTER;
4695 SAVECOPLINE(PL_curcop);
4696 SAVEHINTS();
4697
4698 CopLINE_set(PL_curcop, PL_copline);
3280af22 4699 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4700
4701 if (stash) {
4702 SAVESPTR(PL_curstash);
4703 SAVECOPSTASH(PL_curcop);
4704 PL_curstash = stash;
4705#ifdef USE_ITHREADS
4706 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4707#else
4708 CopSTASH(PL_curcop) = stash;
4709#endif
4710 }
5476c433 4711
09bef843 4712 newATTRSUB(
be24f278 4713 start_subparse(FALSE, 0),
5476c433 4714 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4715 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4716 Nullop,
5476c433
JD		 4717 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4718 );
4719
11faa288 4720 LEAVE;
5476c433
JD		 4721}
4722
954c1994
GS		 4723/*
4724=for apidoc U||newXS
4725
4726Used by C<xsubpp> to hook up XSUBs as Perl subs.
4727
4728=cut
4729*/
4730
57d3b86d 4731CV *
864dbfa3 4732Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4733{
11343788 4734 dTHR;
44a8e56a 4735 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4736 register CV *cv;
44a8e56a 4737
155aba94 4738 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4739 if (GvCVGEN(gv)) {
4740 /* just a cached method */
4741 SvREFCNT_dec(cv);
4742 cv = 0;
4743 }
4744 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4745 /* already defined (or promised) */
599cee73 4746 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4747 && HvNAME(GvSTASH(CvGV(cv)))
4748 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4749 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4750 if (PL_copline != NOLINE)
57843af0 4751 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4752 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4753 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4754 }
4755 SvREFCNT_dec(cv);
4756 cv = 0;
79072805 4757 }
79072805 4758 }
44a8e56a 4759
4760 if (cv) /* must reuse cv if autoloaded */
4761 cv_undef(cv);
a0d0e21e
LW		 4762 else {
4763 cv = (CV*)NEWSV(1105,0);
4764 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4765 if (name) {
4766 GvCV(gv) = cv;
4767 GvCVGEN(gv) = 0;
3280af22 4768 PL_sub_generation++;
44a8e56a 4769 }
a0d0e21e 4770 }
5196be3e 4771 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4772#ifdef USE_THREADS
12ca11f6 4773 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4774 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4775 CvOWNER(cv) = 0;
4776#endif /* USE_THREADS */
b195d487 4777 (void)gv_fetchfile(filename);
57843af0
GS		 4778 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4779 an external constant string */
a0d0e21e 4780 CvXSUB(cv) = subaddr;
44a8e56a 4781
28757baa 4782 if (name) {
4783 char *s = strrchr(name,':');
4784 if (s)
4785 s++;
4786 else
4787 s = name;
ed094faf 4788
7d30b5c4 4789 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4790 goto done;
4791
28757baa 4792 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4793 if (!PL_beginav)
4794 PL_beginav = newAV();
ed094faf 4795 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4796 GvCV(gv) = 0;
28757baa 4797 }
4798 else if (strEQ(s, "END")) {
3280af22
NIS		 4799 if (!PL_endav)
4800 PL_endav = newAV();
4801 av_unshift(PL_endav, 1);
ed094faf 4802 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4803 GvCV(gv) = 0;
28757baa 4804 }
7d30b5c4
GS		 4805 else if (strEQ(s, "CHECK")) {
4806 if (!PL_checkav)
4807 PL_checkav = newAV();
4808 av_unshift(PL_checkav, 1);
4809 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4810 GvCV(gv) = 0;
4811 }
7d07dbc2 4812 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4813 if (!PL_initav)
4814 PL_initav = newAV();
ed094faf 4815 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4816 GvCV(gv) = 0;
ae77835f 4817 }
28757baa 4818 }
8990e307 4819 else
a5f75d66 4820 CvANON_on(cv);
44a8e56a 4821
ed094faf 4822done:
a0d0e21e 4823 return cv;
79072805
LW		 4824}
4825
4826void
864dbfa3 4827Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4828{
11343788 4829 dTHR;
79072805
LW		 4830 register CV *cv;
4831 char *name;
4832 GV *gv;
a0d0e21e 4833 I32 ix;
2d8e6c8d 4834 STRLEN n_a;
79072805 4835
11343788 4836 if (o)
2d8e6c8d 4837 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4838 else
4839 name = "STDOUT";
85e6fe83 4840 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4841 GvMULTI_on(gv);
155aba94 4842 if ((cv = GvFORM(gv))) {
599cee73 4843 if (ckWARN(WARN_REDEFINE)) {
57843af0 4844 line_t oldline = CopLINE(PL_curcop);
79072805 4845
57843af0 4846 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4847 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4848 CopLINE_set(PL_curcop, oldline);
79072805 4849 }
8990e307 4850 SvREFCNT_dec(cv);
79072805 4851 }
3280af22 4852 cv = PL_compcv;
79072805 4853 GvFORM(gv) = cv;
44a8e56a 4854 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4855 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4856
3280af22
NIS		 4857 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4858 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4859 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4860 }
4861
79072805 4862 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4863 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4864 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4865 CvSTART(cv) = LINKLIST(CvROOT(cv));
4866 CvROOT(cv)->op_next = 0;
4867 peep(CvSTART(cv));
11343788 4868 op_free(o);
3280af22 4869 PL_copline = NOLINE;
8990e307 4870 LEAVE_SCOPE(floor);
79072805
LW		 4871}
4872
4873OP *
864dbfa3 4874Perl_newANONLIST(pTHX_ OP *o)
79072805 4875{
93a17b20 4876 return newUNOP(OP_REFGEN, 0,
11343788 4877 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4878}
4879
4880OP *
864dbfa3 4881Perl_newANONHASH(pTHX_ OP *o)
79072805 4882{
93a17b20 4883 return newUNOP(OP_REFGEN, 0,
11343788 4884 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4885}
4886
4887OP *
864dbfa3 4888Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4889{
09bef843
SB		 4890 return newANONATTRSUB(floor, proto, Nullop, block);
4891}
4892
4893OP *
4894Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4895{
a0d0e21e 4896 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4897 newSVOP(OP_ANONCODE, 0,
4898 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4899}
4900
4901OP *
864dbfa3 4902Perl_oopsAV(pTHX_ OP *o)
79072805 4903{
ed6116ce
LW		 4904 switch (o->op_type) {
4905 case OP_PADSV:
4906 o->op_type = OP_PADAV;
22c35a8c 4907 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4908 return ref(o, OP_RV2AV);
ed6116ce
LW		 4909
4910 case OP_RV2SV:
79072805 4911 o->op_type = OP_RV2AV;
22c35a8c 4912 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4913 ref(o, OP_RV2AV);
ed6116ce
LW		 4914 break;
4915
4916 default:
0453d815
PM		 4917 if (ckWARN_d(WARN_INTERNAL))
4918 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4919 break;
4920 }
79072805
LW		 4921 return o;
4922}
4923
4924OP *
864dbfa3 4925Perl_oopsHV(pTHX_ OP *o)
79072805 4926{
0453d815 4927 dTHR;
0453d815 4928
ed6116ce
LW		 4929 switch (o->op_type) {
4930 case OP_PADSV:
4931 case OP_PADAV:
4932 o->op_type = OP_PADHV;
22c35a8c 4933 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4934 return ref(o, OP_RV2HV);
ed6116ce
LW		 4935
4936 case OP_RV2SV:
4937 case OP_RV2AV:
79072805 4938 o->op_type = OP_RV2HV;
22c35a8c 4939 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4940 ref(o, OP_RV2HV);
ed6116ce
LW		 4941 break;
4942
4943 default:
0453d815
PM		 4944 if (ckWARN_d(WARN_INTERNAL))
4945 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4946 break;
4947 }
79072805
LW		 4948 return o;
4949}
4950
4951OP *
864dbfa3 4952Perl_newAVREF(pTHX_ OP *o)
79072805 4953{
ed6116ce
LW		 4954 if (o->op_type == OP_PADANY) {
4955 o->op_type = OP_PADAV;
22c35a8c 4956 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4957 return o;
ed6116ce 4958 }
79072805
LW		 4959 return newUNOP(OP_RV2AV, 0, scalar(o));
4960}
4961
4962OP *
864dbfa3 4963Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4964{
82092f1d 4965 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4966 return newUNOP(OP_NULL, 0, o);
748a9306 4967 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4968}
4969
4970OP *
864dbfa3 4971Perl_newHVREF(pTHX_ OP *o)
79072805 4972{
ed6116ce
LW		 4973 if (o->op_type == OP_PADANY) {
4974 o->op_type = OP_PADHV;
22c35a8c 4975 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4976 return o;
ed6116ce 4977 }
79072805
LW		 4978 return newUNOP(OP_RV2HV, 0, scalar(o));
4979}
4980
4981OP *
864dbfa3 4982Perl_oopsCV(pTHX_ OP *o)
79072805 4983{
cea2e8a9 4984 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4985 /* STUB */
4986 return o;
4987}
4988
4989OP *
864dbfa3 4990Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4991{
c07a80fd 4992 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4993}
4994
4995OP *
864dbfa3 4996Perl_newSVREF(pTHX_ OP *o)
79072805 4997{
ed6116ce
LW		 4998 if (o->op_type == OP_PADANY) {
4999 o->op_type = OP_PADSV;
22c35a8c 5000 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5001 return o;
ed6116ce 5002 }
224a4551
MB		 5003 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5004 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5005 return o;
224a4551 5006 }
79072805
LW		 5007 return newUNOP(OP_RV2SV, 0, scalar(o));
5008}
5009
5010/* Check routines. */
5011
5012OP *
cea2e8a9 5013Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5014{
178c6305
CS		 5015 PADOFFSET ix;
5016 SV* name;
5017
5018 name = NEWSV(1106,0);
5019 sv_upgrade(name, SVt_PVNV);
5020 sv_setpvn(name, "&", 1);
5021 SvIVX(name) = -1;
5022 SvNVX(name) = 1;
5dc0d613 5023 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5024 av_store(PL_comppad_name, ix, name);
5025 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5026 SvPADMY_on(cSVOPo->op_sv);
5027 cSVOPo->op_sv = Nullsv;
5028 cSVOPo->op_targ = ix;
5029 return o;
5f05dabc 5030}
5031
5032OP *
cea2e8a9 5033Perl_ck_bitop(pTHX_ OP *o)
55497cff 5034{
3280af22 5035 o->op_private = PL_hints;
5dc0d613 5036 return o;
55497cff 5037}
5038
5039OP *
cea2e8a9 5040Perl_ck_concat(pTHX_ OP *o)
79072805 5041{
11343788
MB		 5042 if (cUNOPo->op_first->op_type == OP_CONCAT)
5043 o->op_flags |= OPf_STACKED;
5044 return o;
79072805
LW		 5045}
5046
5047OP *
cea2e8a9 5048Perl_ck_spair(pTHX_ OP *o)
79072805 5049{
11343788 5050 if (o->op_flags & OPf_KIDS) {
79072805 5051 OP* newop;
a0d0e21e 5052 OP* kid;
5dc0d613
MB		 5053 OPCODE type = o->op_type;
5054 o = modkids(ck_fun(o), type);
11343788 5055 kid = cUNOPo->op_first;
a0d0e21e
LW		 5056 newop = kUNOP->op_first->op_sibling;
5057 if (newop &&
5058 (newop->op_sibling ||
22c35a8c 5059 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5060 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5061 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5062
11343788 5063 return o;
a0d0e21e
LW		 5064 }
5065 op_free(kUNOP->op_first);
5066 kUNOP->op_first = newop;
5067 }
22c35a8c 5068 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5069 return ck_fun(o);
a0d0e21e
LW		 5070}
5071
5072OP *
cea2e8a9 5073Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5074{
11343788 5075 o = ck_fun(o);
5dc0d613 5076 o->op_private = 0;
11343788
MB		 5077 if (o->op_flags & OPf_KIDS) {
5078 OP *kid = cUNOPo->op_first;
01020589
GS		 5079 switch (kid->op_type) {
5080 case OP_ASLICE:
5081 o->op_flags |= OPf_SPECIAL;
5082 /* FALL THROUGH */
5083 case OP_HSLICE:
5dc0d613 5084 o->op_private |= OPpSLICE;
01020589
GS		 5085 break;
5086 case OP_AELEM:
5087 o->op_flags |= OPf_SPECIAL;
5088 /* FALL THROUGH */
5089 case OP_HELEM:
5090 break;
5091 default:
5092 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5093 PL_op_desc[o->op_type]);
01020589 5094 }
a0d0e21e 5095 null(kid);
79072805 5096 }
11343788 5097 return o;
79072805
LW		 5098}
5099
5100OP *
cea2e8a9 5101Perl_ck_eof(pTHX_ OP *o)
79072805 5102{
11343788 5103 I32 type = o->op_type;
79072805 5104
11343788
MB		 5105 if (o->op_flags & OPf_KIDS) {
5106 if (cLISTOPo->op_first->op_type == OP_STUB) {
5107 op_free(o);
5108 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5109 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5110 }
11343788 5111 return ck_fun(o);
79072805 5112 }
11343788 5113 return o;
79072805
LW		 5114}
5115
5116OP *
cea2e8a9 5117Perl_ck_eval(pTHX_ OP *o)
79072805 5118{
3280af22 5119 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5120 if (o->op_flags & OPf_KIDS) {
5121 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5122
93a17b20 5123 if (!kid) {
11343788
MB		 5124 o->op_flags &= ~OPf_KIDS;
5125 null(o);
79072805
LW		 5126 }
5127 else if (kid->op_type == OP_LINESEQ) {
5128 LOGOP *enter;
5129
11343788
MB		 5130 kid->op_next = o->op_next;
5131 cUNOPo->op_first = 0;
5132 op_free(o);
79072805 5133
b7dc083c 5134 NewOp(1101, enter, 1, LOGOP);
79072805 5135 enter->op_type = OP_ENTERTRY;
22c35a8c 5136 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5137 enter->op_private = 0;
5138
5139 /* establish postfix order */
5140 enter->op_next = (OP*)enter;
5141
11343788
MB		 5142 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5143 o->op_type = OP_LEAVETRY;
22c35a8c 5144 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5145 enter->op_other = o;
5146 return o;
79072805 5147 }
c7cc6f1c 5148 else
473986ff 5149 scalar((OP*)kid);
79072805
LW		 5150 }
5151 else {
11343788 5152 op_free(o);
54b9620d 5153 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5154 }
3280af22 5155 o->op_targ = (PADOFFSET)PL_hints;
11343788 5156 return o;
79072805
LW		 5157}
5158
5159OP *
cea2e8a9 5160Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5161{
5162 OP *kid;
11343788
MB		 5163 if (o->op_flags & OPf_STACKED) {
5164 o = ck_fun(o);
5165 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5166 if (kid->op_type == OP_RV2GV)
5167 null(kid);
79072805 5168 }
463ee0b2 5169 else
11343788
MB		 5170 o = listkids(o);
5171 return o;
79072805
LW		 5172}
5173
5174OP *
cea2e8a9 5175Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5176{
5196be3e
MB		 5177 o = ck_fun(o);
5178 if (o->op_flags & OPf_KIDS) {
5179 OP *kid = cUNOPo->op_first;
afebc493
GS		 5180 if (kid->op_type == OP_ENTERSUB) {
5181 (void) ref(kid, o->op_type);
5182 if (kid->op_type != OP_RV2CV && !PL_error_count)
5183 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5184 PL_op_desc[o->op_type]);
5185 o->op_private |= OPpEXISTS_SUB;
5186 }
5187 else if (kid->op_type == OP_AELEM)
01020589
GS		 5188 o->op_flags |= OPf_SPECIAL;
5189 else if (kid->op_type != OP_HELEM)
5190 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5191 PL_op_desc[o->op_type]);
5f05dabc 5192 null(kid);
5193 }
5196be3e 5194 return o;
5f05dabc 5195}
5196
22c35a8c 5197#if 0
5f05dabc 5198OP *
cea2e8a9 5199Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5200{
5201 o = fold_constants(o);
5202 if (o->op_type == OP_CONST)
5203 o->op_type = OP_GV;
5204 return o;
5205}
22c35a8c 5206#endif
79072805
LW		 5207
5208OP *
cea2e8a9 5209Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5210{
11343788
MB		 5211 dTHR;
5212 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5213
3280af22 5214 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5215 if (kid->op_type == OP_CONST) {
44a8e56a 5216 char *name;
5217 int iscv;
5218 GV *gv;
779c5bc9 5219 SV *kidsv = kid->op_sv;
2d8e6c8d 5220 STRLEN n_a;
44a8e56a 5221
779c5bc9
GS		 5222 /* Is it a constant from cv_const_sv()? */
5223 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5224 SV *rsv = SvRV(kidsv);
5225 int svtype = SvTYPE(rsv);
5226 char *badtype = Nullch;
5227
5228 switch (o->op_type) {
5229 case OP_RV2SV:
5230 if (svtype > SVt_PVMG)
5231 badtype = "a SCALAR";
5232 break;
5233 case OP_RV2AV:
5234 if (svtype != SVt_PVAV)
5235 badtype = "an ARRAY";
5236 break;
5237 case OP_RV2HV:
5238 if (svtype != SVt_PVHV) {
5239 if (svtype == SVt_PVAV) { /* pseudohash? */
5240 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5241 if (ksv && SvROK(*ksv)
5242 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5243 {
5244 break;
5245 }
5246 }
5247 badtype = "a HASH";
5248 }
5249 break;
5250 case OP_RV2CV:
5251 if (svtype != SVt_PVCV)
5252 badtype = "a CODE";
5253 break;
5254 }
5255 if (badtype)
cea2e8a9 5256 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5257 return o;
5258 }
2d8e6c8d 5259 name = SvPV(kidsv, n_a);
3280af22 5260 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5261 char *badthing = Nullch;
5dc0d613 5262 switch (o->op_type) {
44a8e56a 5263 case OP_RV2SV:
5264 badthing = "a SCALAR";
5265 break;
5266 case OP_RV2AV:
5267 badthing = "an ARRAY";
5268 break;
5269 case OP_RV2HV:
5270 badthing = "a HASH";
5271 break;
5272 }
5273 if (badthing)
cea2e8a9 5274 Perl_croak(aTHX_
44a8e56a 5275 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5276 name, badthing);
5277 }
93233ece
CS		 5278 /*
5279 * This is a little tricky. We only want to add the symbol if we
5280 * didn't add it in the lexer. Otherwise we get duplicate strict
5281 * warnings. But if we didn't add it in the lexer, we must at
5282 * least pretend like we wanted to add it even if it existed before,
5283 * or we get possible typo warnings. OPpCONST_ENTERED says
5284 * whether the lexer already added THIS instance of this symbol.
5285 */
5196be3e 5286 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5287 do {
44a8e56a 5288 gv = gv_fetchpv(name,
748a9306 5289 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5290 iscv
5291 ? SVt_PVCV
11343788 5292 : o->op_type == OP_RV2SV
a0d0e21e 5293 ? SVt_PV
11343788 5294 : o->op_type == OP_RV2AV
a0d0e21e 5295 ? SVt_PVAV
11343788 5296 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5297 ? SVt_PVHV
5298 : SVt_PVGV);
93233ece
CS		 5299 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5300 if (gv) {
5301 kid->op_type = OP_GV;
5302 SvREFCNT_dec(kid->op_sv);
350de78d 5303#ifdef USE_ITHREADS
638eceb6 5304 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5305 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5306 GvIN_PAD_on(gv);
350de78d
GS		 5307 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5308#else
93233ece 5309 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5310#endif
76cd736e 5311 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5312 }
79072805 5313 }
11343788 5314 return o;
79072805
LW		 5315}
5316
5317OP *
cea2e8a9 5318Perl_ck_ftst(pTHX_ OP *o)
79072805 5319{
11343788
MB		 5320 dTHR;
5321 I32 type = o->op_type;
79072805 5322
d0dca557
JD		 5323 if (o->op_flags & OPf_REF) {
5324 /* nothing */
5325 }
5326 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5327 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5328
5329 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5330 STRLEN n_a;
a0d0e21e 5331 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5332 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5333 op_free(o);
d0dca557 5334 o = newop;
79072805
LW		 5335 }
5336 }
5337 else {
11343788 5338 op_free(o);
79072805 5339 if (type == OP_FTTTY)
d0dca557 5340 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5341 SVt_PVIO));
79072805 5342 else
d0dca557 5343 o = newUNOP(type, 0, newDEFSVOP());
79072805 5344 }
d0dca557
JD		 5345#ifdef USE_LOCALE
5346 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5347 o->op_private = 0;
5348 if (PL_hints & HINT_LOCALE)
5349 o->op_private |= OPpLOCALE;
5350 }
5351#endif
11343788 5352 return o;
79072805
LW		 5353}
5354
5355OP *
cea2e8a9 5356Perl_ck_fun(pTHX_ OP *o)
79072805 5357{
11343788 5358 dTHR;
79072805
LW		 5359 register OP *kid;
5360 OP **tokid;
5361 OP *sibl;
5362 I32 numargs = 0;
11343788 5363 int type = o->op_type;
22c35a8c 5364 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5365
11343788 5366 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5367 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5368 oa &= ~OA_OPTIONAL;
5369 else
11343788 5370 return no_fh_allowed(o);
79072805
LW		 5371 }
5372
11343788 5373 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5374 STRLEN n_a;
11343788
MB		 5375 tokid = &cLISTOPo->op_first;
5376 kid = cLISTOPo->op_first;
8990e307 5377 if (kid->op_type == OP_PUSHMARK ||
155aba94 5378 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5379 {
79072805
LW		 5380 tokid = &kid->op_sibling;
5381 kid = kid->op_sibling;
5382 }
22c35a8c 5383 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5384 *tokid = kid = newDEFSVOP();
79072805
LW		 5385
5386 while (oa && kid) {
5387 numargs++;
5388 sibl = kid->op_sibling;
5389 switch (oa & 7) {
5390 case OA_SCALAR:
62c18ce2
GS		 5391 /* list seen where single (scalar) arg expected? */
5392 if (numargs == 1 && !(oa >> 4)
5393 && kid->op_type == OP_LIST && type != OP_SCALAR)
5394 {
5395 return too_many_arguments(o,PL_op_desc[type]);
5396 }
79072805
LW		 5397 scalar(kid);
5398 break;
5399 case OA_LIST:
5400 if (oa < 16) {
5401 kid = 0;
5402 continue;
5403 }
5404 else
5405 list(kid);
5406 break;
5407 case OA_AVREF:
5408 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5409 (kid->op_private & OPpCONST_BARE))
5410 {
2d8e6c8d 5411 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5412 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5413 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5414 if (ckWARN(WARN_DEPRECATED))
5415 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5416 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5417 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5418 op_free(kid);
5419 kid = newop;
5420 kid->op_sibling = sibl;
5421 *tokid = kid;
5422 }
8990e307 5423 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5424 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5425 mod(kid, type);
79072805
LW		 5426 break;
5427 case OA_HVREF:
5428 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5429 (kid->op_private & OPpCONST_BARE))
5430 {
2d8e6c8d 5431 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5432 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5433 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5434 if (ckWARN(WARN_DEPRECATED))
5435 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5436 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5437 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5438 op_free(kid);
5439 kid = newop;
5440 kid->op_sibling = sibl;
5441 *tokid = kid;
5442 }
8990e307 5443 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5444 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5445 mod(kid, type);
79072805
LW		 5446 break;
5447 case OA_CVREF:
5448 {
a0d0e21e 5449 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5450 kid->op_sibling = 0;
5451 linklist(kid);
5452 newop->op_next = newop;
5453 kid = newop;
5454 kid->op_sibling = sibl;
5455 *tokid = kid;
5456 }
5457 break;
5458 case OA_FILEREF:
c340be78 5459 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5460 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5461 (kid->op_private & OPpCONST_BARE))
5462 {
79072805 5463 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5464 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5465 SVt_PVIO) );
79072805
LW		 5466 op_free(kid);
5467 kid = newop;
5468 }
1ea32a52
GS		 5469 else if (kid->op_type == OP_READLINE) {
5470 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5471 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5472 }
79072805 5473 else {
35cd451c 5474 I32 flags = OPf_SPECIAL;
a6c40364 5475 I32 priv = 0;
2c8ac474
GS		 5476 PADOFFSET targ = 0;
5477
35cd451c 5478 /* is this op a FH constructor? */
853846ea 5479 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5480 char *name = Nullch;
5481 STRLEN len;
5482
5483 flags = 0;
5484 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5485 * need to "prove" flag does not mean something
5486 * else already - NI-S 1999/05/07
2c8ac474
GS		 5487 */
5488 priv = OPpDEREF;
5489 if (kid->op_type == OP_PADSV) {
5490 SV **namep = av_fetch(PL_comppad_name,
5491 kid->op_targ, 4);
5492 if (namep && *namep)
5493 name = SvPV(*namep, len);
5494 }
5495 else if (kid->op_type == OP_RV2SV
5496 && kUNOP->op_first->op_type == OP_GV)
5497 {
5498 GV *gv = cGVOPx_gv(kUNOP->op_first);
5499 name = GvNAME(gv);
5500 len = GvNAMELEN(gv);
5501 }
5502 if (name) {
5503 SV *namesv;
5504 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5505 namesv = PL_curpad[targ];
155aba94 5506 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5507 if (*name != '$')
5508 sv_setpvn(namesv, "$", 1);
5509 sv_catpvn(namesv, name, len);
5510 }
853846ea 5511 }
79072805 5512 kid->op_sibling = 0;
35cd451c 5513 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5514 kid->op_targ = targ;
5515 kid->op_private |= priv;
79072805
LW		 5516 }
5517 kid->op_sibling = sibl;
5518 *tokid = kid;
5519 }
5520 scalar(kid);
5521 break;
5522 case OA_SCALARREF:
a0d0e21e 5523 mod(scalar(kid), type);
79072805
LW		 5524 break;
5525 }
5526 oa >>= 4;
5527 tokid = &kid->op_sibling;
5528 kid = kid->op_sibling;
5529 }
11343788 5530 o->op_private |= numargs;
79072805 5531 if (kid)
22c35a8c 5532 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5533 listkids(o);
79072805 5534 }
22c35a8c 5535 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5536 op_free(o);
54b9620d 5537 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5538 }
5539
79072805
LW		 5540 if (oa) {
5541 while (oa & OA_OPTIONAL)
5542 oa >>= 4;
5543 if (oa && oa != OA_LIST)
22c35a8c 5544 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5545 }
11343788 5546 return o;
79072805
LW		 5547}
5548
5549OP *
cea2e8a9 5550Perl_ck_glob(pTHX_ OP *o)
79072805 5551{
fb73857a 5552 GV *gv;
5553
649da076 5554 o = ck_fun(o);
1f2bfc8a 5555 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5556 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5557
5558 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5559 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5560
52bb0670 5561#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5562 /* XXX this can be tightened up and made more failsafe. */
5563 if (!gv) {
72b16652 5564 ENTER;
e4783991
GS		 5565 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5566 /* null-terminated import list */
5567 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5568 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5569 LEAVE;
5570 }
52bb0670 5571#endif /* PERL_EXTERNAL_GLOB */
72b16652 5572
b1cb66bf 5573 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5574 append_elem(OP_GLOB, o,
80252599 5575 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5576 o->op_type = OP_LIST;
22c35a8c 5577 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5578 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5579 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5580 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5581 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5582 scalar(newUNOP(OP_RV2CV, 0,
5583 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5584 o = newUNOP(OP_NULL, 0, ck_subr(o));
5585 o->op_targ = OP_GLOB; /* hint at what it used to be */
5586 return o;
b1cb66bf 5587 }
5588 gv = newGVgen("main");
a0d0e21e 5589 gv_IOadd(gv);
11343788
MB		 5590 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5591 scalarkids(o);
649da076 5592 return o;
79072805
LW		 5593}
5594
5595OP *
cea2e8a9 5596Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5597{
5598 LOGOP *gwop;
5599 OP *kid;
11343788 5600 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5601
22c35a8c 5602 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5603 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5604
11343788 5605 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5606 OP* k;
11343788
MB		 5607 o = ck_sort(o);
5608 kid = cLISTOPo->op_first->op_sibling;
5609 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5610 kid = k;
5611 }
5612 kid->op_next = (OP*)gwop;
11343788 5613 o->op_flags &= ~OPf_STACKED;
93a17b20 5614 }
11343788 5615 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5616 if (type == OP_MAPWHILE)
5617 list(kid);
5618 else
5619 scalar(kid);
11343788 5620 o = ck_fun(o);
3280af22 5621 if (PL_error_count)
11343788 5622 return o;
aeea060c 5623 kid = cLISTOPo->op_first->op_sibling;
79072805 5624 if (kid->op_type != OP_NULL)
cea2e8a9 5625 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5626 kid = kUNOP->op_first;
5627
a0d0e21e 5628 gwop->op_type = type;
22c35a8c 5629 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5630 gwop->op_first = listkids(o);
79072805
LW		 5631 gwop->op_flags |= OPf_KIDS;
5632 gwop->op_private = 1;
5633 gwop->op_other = LINKLIST(kid);
a0d0e21e 5634 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5635 kid->op_next = (OP*)gwop;
5636
11343788 5637 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5638 if (!kid || !kid->op_sibling)
22c35a8c 5639 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5640 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5641 mod(kid, OP_GREPSTART);
5642
79072805
LW		 5643 return (OP*)gwop;
5644}
5645
5646OP *
cea2e8a9 5647Perl_ck_index(pTHX_ OP *o)
79072805 5648{
11343788
MB		 5649 if (o->op_flags & OPf_KIDS) {
5650 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5651 if (kid)
5652 kid = kid->op_sibling; /* get past "big" */
79072805 5653 if (kid && kid->op_type == OP_CONST)
2779dcf1 5654 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5655 }
11343788 5656 return ck_fun(o);
79072805
LW		 5657}
5658
5659OP *
cea2e8a9 5660Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5661{
5662 /* XXX length optimization goes here */
11343788 5663 return ck_fun(o);
79072805
LW		 5664}
5665
5666OP *
cea2e8a9 5667Perl_ck_lfun(pTHX_ OP *o)
79072805 5668{
5dc0d613
MB		 5669 OPCODE type = o->op_type;
5670 return modkids(ck_fun(o), type);
79072805
LW		 5671}
5672
5673OP *
cea2e8a9 5674Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5675{
20ce7b12 5676 dTHR;
d0334bed
GS		 5677 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5678 switch (cUNOPo->op_first->op_type) {
5679 case OP_RV2AV:
7e291ef1 5680 break; /* Globals via GV can be undef */
d0334bed
GS		 5681 case OP_PADAV:
5682 case OP_AASSIGN: /* Is this a good idea? */
5683 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5684 "defined(@array) is deprecated");
d0334bed
GS		 5685 Perl_warner(aTHX_ WARN_DEPRECATED,
5686 "(Maybe you should just omit the defined()?)\n");
69794302 5687 break;
d0334bed 5688 case OP_RV2HV:
7e291ef1 5689 break; /* Globals via GV can be undef */
d0334bed
GS		 5690 case OP_PADHV:
5691 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5692 "defined(%%hash) is deprecated");
d0334bed
GS		 5693 Perl_warner(aTHX_ WARN_DEPRECATED,
5694 "(Maybe you should just omit the defined()?)\n");
5695 break;
5696 default:
5697 /* no warning */
5698 break;
5699 }
69794302
MJD		 5700 }
5701 return ck_rfun(o);
5702}
5703
5704OP *
cea2e8a9 5705Perl_ck_rfun(pTHX_ OP *o)
8990e307 5706{
5dc0d613
MB		 5707 OPCODE type = o->op_type;
5708 return refkids(ck_fun(o), type);
8990e307
LW		 5709}
5710
5711OP *
cea2e8a9 5712Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5713{
5714 register OP *kid;
aeea060c 5715
11343788 5716 kid = cLISTOPo->op_first;
79072805 5717 if (!kid) {
11343788
MB		 5718 o = force_list(o);
5719 kid = cLISTOPo->op_first;
79072805
LW		 5720 }
5721 if (kid->op_type == OP_PUSHMARK)
5722 kid = kid->op_sibling;
11343788 5723 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5724 kid = kid->op_sibling;
5725 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5726 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5727 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5728 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5729 cLISTOPo->op_first->op_sibling = kid;
5730 cLISTOPo->op_last = kid;
79072805
LW		 5731 kid = kid->op_sibling;
5732 }
5733 }
5734
5735 if (!kid)
54b9620d 5736 append_elem(o->op_type, o, newDEFSVOP());
79072805 5737
5dc0d613 5738 o = listkids(o);
bbce6d69 5739
5dc0d613 5740 o->op_private = 0;
36477c24 5741#ifdef USE_LOCALE
3280af22 5742 if (PL_hints & HINT_LOCALE)
5dc0d613 5743 o->op_private |= OPpLOCALE;
bbce6d69 5744#endif
5745
5dc0d613 5746 return o;
bbce6d69 5747}
5748
5749OP *
cea2e8a9 5750Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5751{
5dc0d613 5752 o = ck_fun(o);
bbce6d69 5753
5dc0d613 5754 o->op_private = 0;
36477c24 5755#ifdef USE_LOCALE
3280af22 5756 if (PL_hints & HINT_LOCALE)
5dc0d613 5757 o->op_private |= OPpLOCALE;
bbce6d69 5758#endif
5759
5dc0d613 5760 return o;
bbce6d69 5761}
5762
5763OP *
b162f9ea
IZ		 5764Perl_ck_sassign(pTHX_ OP *o)
5765{
5766 OP *kid = cLISTOPo->op_first;
5767 /* has a disposable target? */
5768 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5769 && !(kid->op_flags & OPf_STACKED)
5770 /* Cannot steal the second time! */
5771 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5772 {
5773 OP *kkid = kid->op_sibling;
5774
5775 /* Can just relocate the target. */
2c2d71f5
JH		 5776 if (kkid && kkid->op_type == OP_PADSV
5777 && !(kkid->op_private & OPpLVAL_INTRO))
5778 {
b162f9ea 5779 kid->op_targ = kkid->op_targ;
743e66e6 5780 kkid->op_targ = 0;
b162f9ea
IZ		 5781 /* Now we do not need PADSV and SASSIGN. */
5782 kid->op_sibling = o->op_sibling; /* NULL */
5783 cLISTOPo->op_first = NULL;
5784 op_free(o);
5785 op_free(kkid);
5786 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5787 return kid;
5788 }
5789 }
5790 return o;
5791}
5792
5793OP *
cea2e8a9 5794Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5795{
5dc0d613 5796 o->op_private = 0;
36477c24 5797#ifdef USE_LOCALE
3280af22 5798 if (PL_hints & HINT_LOCALE)
5dc0d613 5799 o->op_private |= OPpLOCALE;
bbce6d69 5800#endif
36477c24 5801
5dc0d613 5802 return o;
79072805
LW		 5803}
5804
5805OP *
cea2e8a9 5806Perl_ck_match(pTHX_ OP *o)
79072805 5807{
5dc0d613 5808 o->op_private |= OPpRUNTIME;
11343788 5809 return o;
79072805
LW		 5810}
5811
5812OP *
f5d5a27c
CS		 5813Perl_ck_method(pTHX_ OP *o)
5814{
5815 OP *kid = cUNOPo->op_first;
5816 if (kid->op_type == OP_CONST) {
5817 SV* sv = kSVOP->op_sv;
5818 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5819 OP *cmop;
155aba94
GS		 5820 (void)SvUPGRADE(sv, SVt_PVIV);
5821 (void)SvIOK_on(sv);
f5d5a27c
CS		 5822 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5823 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5824 kSVOP->op_sv = Nullsv;
5825 op_free(o);
5826 return cmop;
5827 }
5828 }
5829 return o;
5830}
5831
5832OP *
cea2e8a9 5833Perl_ck_null(pTHX_ OP *o)
79072805 5834{
11343788 5835 return o;
79072805
LW		 5836}
5837
5838OP *
16fe6d59
GS		 5839Perl_ck_open(pTHX_ OP *o)
5840{
5841 HV *table = GvHV(PL_hintgv);
5842 if (table) {
5843 SV **svp;
5844 I32 mode;
5845 svp = hv_fetch(table, "open_IN", 7, FALSE);
5846 if (svp && *svp) {
5847 mode = mode_from_discipline(*svp);
5848 if (mode & O_BINARY)
5849 o->op_private |= OPpOPEN_IN_RAW;
5850 else if (mode & O_TEXT)
5851 o->op_private |= OPpOPEN_IN_CRLF;
5852 }
5853
5854 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5855 if (svp && *svp) {
5856 mode = mode_from_discipline(*svp);
5857 if (mode & O_BINARY)
5858 o->op_private |= OPpOPEN_OUT_RAW;
5859 else if (mode & O_TEXT)
5860 o->op_private |= OPpOPEN_OUT_CRLF;
5861 }
5862 }
5863 if (o->op_type == OP_BACKTICK)
5864 return o;
5865 return ck_fun(o);
5866}
5867
5868OP *
cea2e8a9 5869Perl_ck_repeat(pTHX_ OP *o)
79072805 5870{
11343788
MB		 5871 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5872 o->op_private |= OPpREPEAT_DOLIST;
5873 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5874 }
5875 else
11343788
MB		 5876 scalar(o);
5877 return o;
79072805
LW		 5878}
5879
5880OP *
cea2e8a9 5881Perl_ck_require(pTHX_ OP *o)
8990e307 5882{
11343788
MB		 5883 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5884 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5885
5886 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5887 char *s;
a0d0e21e
LW		 5888 for (s = SvPVX(kid->op_sv); *s; s++) {
5889 if (*s == ':' && s[1] == ':') {
5890 *s = '/';
1aef975c 5891 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5892 --SvCUR(kid->op_sv);
5893 }
8990e307 5894 }
ce3b816e
GS		 5895 if (SvREADONLY(kid->op_sv)) {
5896 SvREADONLY_off(kid->op_sv);
5897 sv_catpvn(kid->op_sv, ".pm", 3);
5898 SvREADONLY_on(kid->op_sv);
5899 }
5900 else
5901 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5902 }
5903 }
11343788 5904 return ck_fun(o);
8990e307
LW		 5905}
5906
22c35a8c 5907#if 0
8990e307 5908OP *
cea2e8a9 5909Perl_ck_retarget(pTHX_ OP *o)
79072805 5910{
cea2e8a9 5911 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5912 /* STUB */
11343788 5913 return o;
79072805 5914}
22c35a8c 5915#endif
79072805
LW		 5916
5917OP *
cea2e8a9 5918Perl_ck_select(pTHX_ OP *o)
79072805 5919{
c07a80fd 5920 OP* kid;
11343788
MB		 5921 if (o->op_flags & OPf_KIDS) {
5922 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5923 if (kid && kid->op_sibling) {
11343788 5924 o->op_type = OP_SSELECT;
22c35a8c 5925 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5926 o = ck_fun(o);
5927 return fold_constants(o);
79072805
LW		 5928 }
5929 }
11343788
MB		 5930 o = ck_fun(o);
5931 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5932 if (kid && kid->op_type == OP_RV2GV)
5933 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5934 return o;
79072805
LW		 5935}
5936
5937OP *
cea2e8a9 5938Perl_ck_shift(pTHX_ OP *o)
79072805 5939{
11343788 5940 I32 type = o->op_type;
79072805 5941
11343788 5942 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5943 OP *argop;
5944
11343788 5945 op_free(o);
6d4ff0d2 5946#ifdef USE_THREADS
533c011a 5947 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5948 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5949 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5950 }
5951 else {
5952 argop = newUNOP(OP_RV2AV, 0,
5953 scalar(newGVOP(OP_GV, 0,
5954 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5955 }
5956#else
5957 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5958 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5959 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5960#endif /* USE_THREADS */
5961 return newUNOP(type, 0, scalar(argop));
79072805 5962 }
11343788 5963 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5964}
5965
5966OP *
cea2e8a9 5967Perl_ck_sort(pTHX_ OP *o)
79072805 5968{
5dc0d613 5969 o->op_private = 0;
36477c24 5970#ifdef USE_LOCALE
3280af22 5971 if (PL_hints & HINT_LOCALE)
5dc0d613 5972 o->op_private |= OPpLOCALE;
bbce6d69 5973#endif
5974
9ea6e965 5975 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5976 simplify_sort(o);
9c007264 5977 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5978 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5979 OP *k;
82092f1d 5980 kid = kUNOP->op_first; /* get past null */
79072805 5981
463ee0b2 5982 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5983 linklist(kid);
463ee0b2
LW		 5984 if (kid->op_type == OP_SCOPE) {
5985 k = kid->op_next;
5986 kid->op_next = 0;
79072805 5987 }
463ee0b2 5988 else if (kid->op_type == OP_LEAVE) {
11343788 5989 if (o->op_type == OP_SORT) {
748a9306
LW		 5990 null(kid); /* wipe out leave */
5991 kid->op_next = kid;
463ee0b2 5992
748a9306
LW		 5993 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5994 if (k->op_next == kid)
5995 k->op_next = 0;
5996 }
463ee0b2 5997 }
748a9306
LW		 5998 else
5999 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6000 k = kLISTOP->op_first;
463ee0b2 6001 }
a0d0e21e
LW		 6002 peep(k);
6003
11343788 6004 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 6005 if (o->op_type == OP_SORT)
a0d0e21e
LW		 6006 kid->op_next = kid;
6007 else
6008 kid->op_next = k;
11343788 6009 o->op_flags |= OPf_SPECIAL;
79072805 6010 }
c6e96bcb
GS		 6011 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
6012 null(cLISTOPo->op_first->op_sibling);
79072805 6013 }
bbce6d69 6014
11343788 6015 return o;
79072805 6016}
bda4119b
GS		 6017
6018STATIC void
cea2e8a9 6019S_simplify_sort(pTHX_ OP *o)
9c007264 6020{
51a19bc0 6021 dTHR;
9c007264
JH		 6022 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6023 OP *k;
6024 int reversed;
350de78d 6025 GV *gv;
9c007264
JH		 6026 if (!(o->op_flags & OPf_STACKED))
6027 return;
9ea6e965
GS		 6028 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6029 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6030 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6031 if (kid->op_type != OP_SCOPE)
6032 return;
6033 kid = kLISTOP->op_last; /* get past scope */
6034 switch(kid->op_type) {
6035 case OP_NCMP:
6036 case OP_I_NCMP:
6037 case OP_SCMP:
6038 break;
6039 default:
6040 return;
6041 }
6042 k = kid; /* remember this node*/
6043 if (kBINOP->op_first->op_type != OP_RV2SV)
6044 return;
6045 kid = kBINOP->op_first; /* get past cmp */
6046 if (kUNOP->op_first->op_type != OP_GV)
6047 return;
6048 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6049 gv = kGVOP_gv;
350de78d 6050 if (GvSTASH(gv) != PL_curstash)
9c007264 6051 return;
350de78d 6052 if (strEQ(GvNAME(gv), "a"))
9c007264 6053 reversed = 0;
0f79a09d 6054 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6055 reversed = 1;
6056 else
6057 return;
6058 kid = k; /* back to cmp */
6059 if (kBINOP->op_last->op_type != OP_RV2SV)
6060 return;
6061 kid = kBINOP->op_last; /* down to 2nd arg */
6062 if (kUNOP->op_first->op_type != OP_GV)
6063 return;
6064 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6065 gv = kGVOP_gv;
350de78d 6066 if (GvSTASH(gv) != PL_curstash
9c007264 6067 || ( reversed
350de78d
GS		 6068 ? strNE(GvNAME(gv), "a")
6069 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6070 return;
6071 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6072 if (reversed)
6073 o->op_private |= OPpSORT_REVERSE;
6074 if (k->op_type == OP_NCMP)
6075 o->op_private |= OPpSORT_NUMERIC;
6076 if (k->op_type == OP_I_NCMP)
6077 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6078 kid = cLISTOPo->op_first->op_sibling;
6079 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6080 op_free(kid); /* then delete it */
6081 cLISTOPo->op_children--;
9c007264 6082}
79072805
LW		 6083
6084OP *
cea2e8a9 6085Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6086{
6087 register OP *kid;
aeea060c 6088
11343788
MB		 6089 if (o->op_flags & OPf_STACKED)
6090 return no_fh_allowed(o);
79072805 6091
11343788 6092 kid = cLISTOPo->op_first;
8990e307 6093 if (kid->op_type != OP_NULL)
cea2e8a9 6094 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6095 kid = kid->op_sibling;
11343788
MB		 6096 op_free(cLISTOPo->op_first);
6097 cLISTOPo->op_first = kid;
85e6fe83 6098 if (!kid) {
79cb57f6 6099 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6100 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6101 }
79072805
LW		 6102
6103 if (kid->op_type != OP_MATCH) {
6104 OP *sibl = kid->op_sibling;
463ee0b2 6105 kid->op_sibling = 0;
79072805 6106 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6107 if (cLISTOPo->op_first == cLISTOPo->op_last)
6108 cLISTOPo->op_last = kid;
6109 cLISTOPo->op_first = kid;
79072805
LW		 6110 kid->op_sibling = sibl;
6111 }
6112
6113 kid->op_type = OP_PUSHRE;
22c35a8c 6114 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6115 scalar(kid);
6116
6117 if (!kid->op_sibling)
54b9620d 6118 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6119
6120 kid = kid->op_sibling;
6121 scalar(kid);
6122
6123 if (!kid->op_sibling)
11343788 6124 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6125
6126 kid = kid->op_sibling;
6127 scalar(kid);
6128
6129 if (kid->op_sibling)
22c35a8c 6130 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6131
11343788 6132 return o;
79072805
LW		 6133}
6134
6135OP *
eb6e2d6f
GS		 6136Perl_ck_join(pTHX_ OP *o)
6137{
6138 if (ckWARN(WARN_SYNTAX)) {
6139 OP *kid = cLISTOPo->op_first->op_sibling;
6140 if (kid && kid->op_type == OP_MATCH) {
6141 char *pmstr = "STRING";
6142 if (kPMOP->op_pmregexp)
6143 pmstr = kPMOP->op_pmregexp->precomp;
6144 Perl_warner(aTHX_ WARN_SYNTAX,
6145 "/%s/ should probably be written as \"%s\"",
6146 pmstr, pmstr);
6147 }
6148 }
6149 return ck_fun(o);
6150}
6151
6152OP *
cea2e8a9 6153Perl_ck_subr(pTHX_ OP *o)
79072805 6154{
11343788
MB		 6155 dTHR;
6156 OP *prev = ((cUNOPo->op_first->op_sibling)
6157 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6158 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6159 OP *cvop;
6160 char *proto = 0;
6161 CV *cv = 0;
46fc3d4c 6162 GV *namegv = 0;
4633a7c4
LW		 6163 int optional = 0;
6164 I32 arg = 0;
2d8e6c8d 6165 STRLEN n_a;
4633a7c4 6166
d3011074 6167 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6168 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6169 if (cvop->op_type == OP_RV2CV) {
6170 SVOP* tmpop;
11343788 6171 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6172 null(cvop); /* disable rv2cv */
6173 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6174 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6175 GV *gv = cGVOPx_gv(tmpop);
350de78d 6176 cv = GvCVu(gv);
76cd736e
GS		 6177 if (!cv)
6178 tmpop->op_private |= OPpEARLY_CV;
6179 else if (SvPOK(cv)) {
350de78d 6180 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6181 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6182 }
4633a7c4
LW		 6183 }
6184 }
f5d5a27c 6185 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6186 if (o2->op_type == OP_CONST)
6187 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6188 else if (o2->op_type == OP_LIST) {
6189 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6190 if (o && o->op_type == OP_CONST)
6191 o->op_private &= ~OPpCONST_STRICT;
6192 }
7a52d87a 6193 }
3280af22
NIS		 6194 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6195 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6196 o->op_private |= OPpENTERSUB_DB;
6197 while (o2 != cvop) {
4633a7c4
LW		 6198 if (proto) {
6199 switch (*proto) {
6200 case '\0':
5dc0d613 6201 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6202 case ';':
6203 optional = 1;
6204 proto++;
6205 continue;
6206 case '$':
6207 proto++;
6208 arg++;
11343788 6209 scalar(o2);
4633a7c4
LW		 6210 break;
6211 case '%':
6212 case '@':
11343788 6213 list(o2);
4633a7c4
LW		 6214 arg++;
6215 break;
6216 case '&':
6217 proto++;
6218 arg++;
11343788 6219 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6220 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6221 break;
6222 case '*':
2ba6ecf4 6223 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6224 proto++;
6225 arg++;
11343788 6226 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6227 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6228 else if (o2->op_type == OP_CONST)
6229 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6230 else if (o2->op_type == OP_ENTERSUB) {
6231 /* accidental subroutine, revert to bareword */
6232 OP *gvop = ((UNOP*)o2)->op_first;
6233 if (gvop && gvop->op_type == OP_NULL) {
6234 gvop = ((UNOP*)gvop)->op_first;
6235 if (gvop) {
6236 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6237 ;
6238 if (gvop &&
6239 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6240 (gvop = ((UNOP*)gvop)->op_first) &&
6241 gvop->op_type == OP_GV)
6242 {
638eceb6 6243 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6244 OP *sibling = o2->op_sibling;
2692f720 6245 SV *n = newSVpvn("",0);
9675f7ac 6246 op_free(o2);
2692f720
GS		 6247 gv_fullname3(n, gv, "");
6248 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6249 sv_chop(n, SvPVX(n)+6);
6250 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6251 prev->op_sibling = o2;
6252 o2->op_sibling = sibling;
6253 }
6254 }
6255 }
6256 }
2ba6ecf4
GS		 6257 scalar(o2);
6258 break;
4633a7c4
LW		 6259 case '\\':
6260 proto++;
6261 arg++;
6262 switch (*proto++) {
6263 case '*':
11343788 6264 if (o2->op_type != OP_RV2GV)
5dc0d613 6265 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6266 goto wrapref;
6267 case '&':
11343788 6268 if (o2->op_type != OP_RV2CV)
5dc0d613 6269 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6270 goto wrapref;
6271 case '$':
386acf99
GS		 6272 if (o2->op_type != OP_RV2SV
6273 && o2->op_type != OP_PADSV
1c01eb51
GS		 6274 && o2->op_type != OP_HELEM
6275 && o2->op_type != OP_AELEM
386acf99
GS		 6276 && o2->op_type != OP_THREADSV)
6277 {
5dc0d613 6278 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6279 }
4633a7c4
LW		 6280 goto wrapref;
6281 case '@':
11343788 6282 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6283 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6284 goto wrapref;
6285 case '%':
11343788 6286 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6287 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6288 wrapref:
6289 {
11343788 6290 OP* kid = o2;
6fa846a0 6291 OP* sib = kid->op_sibling;
4633a7c4 6292 kid->op_sibling = 0;
6fa846a0
GS		 6293 o2 = newUNOP(OP_REFGEN, 0, kid);
6294 o2->op_sibling = sib;
e858de61 6295 prev->op_sibling = o2;
4633a7c4
LW		 6296 }
6297 break;
6298 default: goto oops;
6299 }
6300 break;
b1cb66bf 6301 case ' ':
6302 proto++;
6303 continue;
4633a7c4
LW		 6304 default:
6305 oops:
cea2e8a9 6306 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6307 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6308 }
6309 }
6310 else
11343788
MB		 6311 list(o2);
6312 mod(o2, OP_ENTERSUB);
6313 prev = o2;
6314 o2 = o2->op_sibling;
4633a7c4 6315 }
fb73857a 6316 if (proto && !optional &&
6317 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6318 return too_few_arguments(o, gv_ename(namegv));
11343788 6319 return o;
79072805
LW		 6320}
6321
6322OP *
cea2e8a9 6323Perl_ck_svconst(pTHX_ OP *o)
8990e307 6324{
11343788
MB		 6325 SvREADONLY_on(cSVOPo->op_sv);
6326 return o;
8990e307
LW		 6327}
6328
6329OP *
cea2e8a9 6330Perl_ck_trunc(pTHX_ OP *o)
79072805 6331{
11343788
MB		 6332 if (o->op_flags & OPf_KIDS) {
6333 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6334
a0d0e21e
LW		 6335 if (kid->op_type == OP_NULL)
6336 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6337 if (kid && kid->op_type == OP_CONST &&
6338 (kid->op_private & OPpCONST_BARE))
6339 {
11343788 6340 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6341 kid->op_private &= ~OPpCONST_STRICT;
6342 }
79072805 6343 }
11343788 6344 return ck_fun(o);
79072805
LW		 6345}
6346
463ee0b2
LW		 6347/* A peephole optimizer. We visit the ops in the order they're to execute. */
6348
79072805 6349void
864dbfa3 6350Perl_peep(pTHX_ register OP *o)
79072805 6351{
11343788 6352 dTHR;
79072805 6353 register OP* oldop = 0;
2d8e6c8d 6354 STRLEN n_a;
cd06dffe 6355 OP *last_composite = Nullop;
2d8e6c8d 6356
a0d0e21e 6357 if (!o || o->op_seq)
79072805 6358 return;
a0d0e21e 6359 ENTER;
462e5cf6 6360 SAVEOP();
7766f137 6361 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6362 for (; o; o = o->op_next) {
6363 if (o->op_seq)
6364 break;
3280af22
NIS		 6365 if (!PL_op_seqmax)
6366 PL_op_seqmax++;
533c011a 6367 PL_op = o;
a0d0e21e 6368 switch (o->op_type) {
acb36ea4 6369 case OP_SETSTATE:
a0d0e21e
LW		 6370 case OP_NEXTSTATE:
6371 case OP_DBSTATE:
3280af22
NIS		 6372 PL_curcop = ((COP*)o); /* for warnings */
6373 o->op_seq = PL_op_seqmax++;
cd06dffe 6374 last_composite = Nullop;
a0d0e21e
LW		 6375 break;
6376
a0d0e21e 6377 case OP_CONST:
7a52d87a
GS		 6378 if (cSVOPo->op_private & OPpCONST_STRICT)
6379 no_bareword_allowed(o);
7766f137
GS		 6380#ifdef USE_ITHREADS
6381 /* Relocate sv to the pad for thread safety.
6382 * Despite being a "constant", the SV is written to,
6383 * for reference counts, sv_upgrade() etc. */
6384 if (cSVOP->op_sv) {
6385 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6386 SvREFCNT_dec(PL_curpad[ix]);
6387 SvPADTMP_on(cSVOPo->op_sv);
6388 PL_curpad[ix] = cSVOPo->op_sv;
6389 cSVOPo->op_sv = Nullsv;
6390 o->op_targ = ix;
6391 }
6392#endif
07447971
GS		 6393 o->op_seq = PL_op_seqmax++;
6394 break;
6395
ed7ab888 6396 case OP_CONCAT:
b162f9ea
IZ		 6397 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6398 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6399 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6400 goto ignore_optimization;
cd06dffe 6401 else {
07447971 6402 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6403 o->op_targ = o->op_next->op_targ;
743e66e6 6404 o->op_next->op_targ = 0;
2c2d71f5 6405 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6406 }
6407 }
a0d0e21e 6408 null(o->op_next);
b162f9ea
IZ		 6409 }
6410 ignore_optimization:
3280af22 6411 o->op_seq = PL_op_seqmax++;
a0d0e21e 6412 break;
8990e307 6413 case OP_STUB:
54310121 6414 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6415 o->op_seq = PL_op_seqmax++;
54310121 6416 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6417 }
748a9306 6418 goto nothin;
79072805 6419 case OP_NULL:
acb36ea4
GS		 6420 if (o->op_targ == OP_NEXTSTATE
6421 || o->op_targ == OP_DBSTATE
6422 || o->op_targ == OP_SETSTATE)
6423 {
3280af22 6424 PL_curcop = ((COP*)o);
acb36ea4 6425 }
748a9306 6426 goto nothin;
79072805 6427 case OP_SCALAR:
93a17b20 6428 case OP_LINESEQ:
463ee0b2 6429 case OP_SCOPE:
748a9306 6430 nothin:
a0d0e21e
LW		 6431 if (oldop && o->op_next) {
6432 oldop->op_next = o->op_next;
79072805
LW		 6433 continue;
6434 }
3280af22 6435 o->op_seq = PL_op_seqmax++;
79072805
LW		 6436 break;
6437
6438 case OP_GV:
a0d0e21e 6439 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6440 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6441 null(o->op_next);
64aac5a9
GS		 6442 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6443 | OPpOUR_INTRO);
a0d0e21e
LW		 6444 o->op_next = o->op_next->op_next;
6445 o->op_type = OP_GVSV;
22c35a8c 6446 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6447 }
6448 }
a0d0e21e
LW		 6449 else if (o->op_next->op_type == OP_RV2AV) {
6450 OP* pop = o->op_next->op_next;
6451 IV i;
8990e307 6452 if (pop->op_type == OP_CONST &&
533c011a 6453 (PL_op = pop->op_next) &&
8990e307 6454 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6455 !(pop->op_next->op_private &
68dc0745 6456 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6457 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6458 <= 255 &&
8990e307
LW		 6459 i >= 0)
6460 {
350de78d 6461 GV *gv;
a0d0e21e 6462 null(o->op_next);
8990e307
LW		 6463 null(pop->op_next);
6464 null(pop);
a0d0e21e
LW		 6465 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6466 o->op_next = pop->op_next->op_next;
6467 o->op_type = OP_AELEMFAST;
22c35a8c 6468 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6469 o->op_private = (U8)i;
638eceb6 6470 gv = cGVOPo_gv;
350de78d 6471 GvAVn(gv);
8990e307 6472 }
79072805 6473 }
e476b1b5 6474 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6475 GV *gv = cGVOPo_gv;
76cd736e
GS		 6476 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6477 /* XXX could check prototype here instead of just carping */
6478 SV *sv = sv_newmortal();
6479 gv_efullname3(sv, gv, Nullch);
e476b1b5 6480 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6481 "%s() called too early to check prototype",
6482 SvPV_nolen(sv));
6483 }
6484 }
6485
3280af22 6486 o->op_seq = PL_op_seqmax++;
79072805
LW		 6487 break;
6488
a0d0e21e 6489 case OP_MAPWHILE:
79072805
LW		 6490 case OP_GREPWHILE:
6491 case OP_AND:
6492 case OP_OR:
2c2d71f5
JH		 6493 case OP_ANDASSIGN:
6494 case OP_ORASSIGN:
1a67a97c
SM		 6495 case OP_COND_EXPR:
6496 case OP_RANGE:
3280af22 6497 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6498 while (cLOGOP->op_other->op_type == OP_NULL)
6499 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6500 peep(cLOGOP->op_other);
6501 break;
6502
79072805 6503 case OP_ENTERLOOP:
3280af22 6504 o->op_seq = PL_op_seqmax++;
79072805
LW		 6505 peep(cLOOP->op_redoop);
6506 peep(cLOOP->op_nextop);
6507 peep(cLOOP->op_lastop);
6508 break;
6509
8782bef2 6510 case OP_QR:
79072805
LW		 6511 case OP_MATCH:
6512 case OP_SUBST:
3280af22 6513 o->op_seq = PL_op_seqmax++;
a0d0e21e 6514 peep(cPMOP->op_pmreplstart);
79072805
LW		 6515 break;
6516
a0d0e21e 6517 case OP_EXEC:
3280af22 6518 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6519 if (ckWARN(WARN_SYNTAX) && o->op_next
6520 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6521 if (o->op_next->op_sibling &&
20408e3c
GS		 6522 o->op_next->op_sibling->op_type != OP_EXIT &&
6523 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6524 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6525 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6526
57843af0 6527 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6528 Perl_warner(aTHX_ WARN_EXEC,
6529 "Statement unlikely to be reached");
6530 Perl_warner(aTHX_ WARN_EXEC,
6531 "(Maybe you meant system() when you said exec()?)\n");
57843af0 6532 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6533 }
6534 }
6535 break;
aeea060c 6536
c750a3ec
MB		 6537 case OP_HELEM: {
6538 UNOP *rop;
6539 SV *lexname;
6540 GV **fields;
9615e741 6541 SV **svp, **indsvp, *sv;
c750a3ec
MB		 6542 I32 ind;
6543 char *key;
6544 STRLEN keylen;
aeea060c 6545
9615e741 6546 o->op_seq = PL_op_seqmax++;
377b21bb 6547 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6548 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6549 break;
6550 rop = (UNOP*)((BINOP*)o)->op_first;
6551 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6552 break;
3280af22 6553 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6554 if (!SvOBJECT(lexname))
6555 break;
5196be3e 6556 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6557 if (!fields || !GvHV(*fields))
6558 break;
638eceb6 6559 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6560 key = SvPV(*svp, keylen);
6561 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6562 if (!indsvp) {
88e9b055 6563 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6564 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6565 }
6566 ind = SvIV(*indsvp);
6567 if (ind < 1)
cea2e8a9 6568 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6569 rop->op_type = OP_RV2AV;
22c35a8c 6570 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6571 o->op_type = OP_AELEM;
22c35a8c 6572 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6573 sv = newSViv(ind);
6574 if (SvREADONLY(*svp))
6575 SvREADONLY_on(sv);
6576 SvFLAGS(sv) |= (SvFLAGS(*svp)
6577 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6578 SvREFCNT_dec(*svp);
9615e741 6579 *svp = sv;
c750a3ec
MB		 6580 break;
6581 }
345599ca
GS		 6582
6583 case OP_HSLICE: {
6584 UNOP *rop;
6585 SV *lexname;
6586 GV **fields;
9615e741 6587 SV **svp, **indsvp, *sv;
345599ca
GS		 6588 I32 ind;
6589 char *key;
6590 STRLEN keylen;
6591 SVOP *first_key_op, *key_op;
9615e741
GS		 6592
6593 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6594 if ((o->op_private & (OPpLVAL_INTRO))
6595 /* I bet there's always a pushmark... */
6596 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6597 /* hmmm, no optimization if list contains only one key. */
6598 break;
6599 rop = (UNOP*)((LISTOP*)o)->op_last;
6600 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6601 break;
6602 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6603 if (!SvOBJECT(lexname))
6604 break;
6605 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6606 if (!fields || !GvHV(*fields))
6607 break;
6608 /* Again guessing that the pushmark can be jumped over.... */
6609 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6610 ->op_first->op_sibling;
6611 /* Check that the key list contains only constants. */
6612 for (key_op = first_key_op; key_op;
6613 key_op = (SVOP*)key_op->op_sibling)
6614 if (key_op->op_type != OP_CONST)
6615 break;
6616 if (key_op)
6617 break;
6618 rop->op_type = OP_RV2AV;
6619 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6620 o->op_type = OP_ASLICE;
6621 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6622 for (key_op = first_key_op; key_op;
6623 key_op = (SVOP*)key_op->op_sibling) {
6624 svp = cSVOPx_svp(key_op);
6625 key = SvPV(*svp, keylen);
6626 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6627 if (!indsvp) {
9615e741
GS		 6628 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6629 "in variable %s of type %s",
345599ca
GS		 6630 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6631 }
6632 ind = SvIV(*indsvp);
6633 if (ind < 1)
6634 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6635 sv = newSViv(ind);
6636 if (SvREADONLY(*svp))
6637 SvREADONLY_on(sv);
6638 SvFLAGS(sv) |= (SvFLAGS(*svp)
6639 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6640 SvREFCNT_dec(*svp);
9615e741 6641 *svp = sv;
345599ca
GS		 6642 }
6643 break;
6644 }
c750a3ec 6645
cd06dffe
GS		 6646 case OP_RV2AV:
6647 case OP_RV2HV:
6648 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6649 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6650 {
cd06dffe 6651 last_composite = o;
e1f15930 6652 }
cd06dffe
GS		 6653 o->op_seq = PL_op_seqmax++;
6654 break;
6655
6656 case OP_RETURN:
970c4905 6657 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6658 o->op_seq = PL_op_seqmax++;
6659 break;
6660 }
6661 /* FALL THROUGH */
6662
6663 case OP_LEAVESUBLV:
6664 if (last_composite) {
6665 OP *r = last_composite;
6666
6667 while (r->op_sibling)
6668 r = r->op_sibling;
6669 if (r->op_next == o
6670 || (r->op_next->op_type == OP_LIST
6671 && r->op_next->op_next == o))
6672 {
6673 if (last_composite->op_type == OP_RV2AV)
6674 yyerror("Lvalue subs returning arrays not implemented yet");
6675 else
6676 yyerror("Lvalue subs returning hashes not implemented yet");
6677 ;
6678 }
6679 }
6680 /* FALL THROUGH */
6681
79072805 6682 default:
3280af22 6683 o->op_seq = PL_op_seqmax++;
79072805
LW		 6684 break;
6685 }
a0d0e21e 6686 oldop = o;
79072805 6687 }
a0d0e21e 6688 LEAVE;
79072805 6689}
Unnamed repository; edit this file 'description' to name the repository.