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Netware README tweak.
[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
bc89e66f 3 * Copyright (c) 1991-2001, 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
1c846c1f 25#ifdef PL_OP_SLAB_ALLOC
b7dc083c
NIS		 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
1c846c1f 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
1c846c1f 37{
b7dc083c
NIS		 38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
1c846c1f 43#else
b7dc083c
NIS		 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 57#define PAD_MAX 999999999
e6438c1a 58#define RETURN_UNLIMITED_NUMBER (PERL_INT_MAX / 2)
c53d7c7d 59
76e3520e 60STATIC char*
cea2e8a9 61S_gv_ename(pTHX_ GV *gv)
4633a7c4 62{
2d8e6c8d 63 STRLEN n_a;
4633a7c4 64 SV* tmpsv = sv_newmortal();
46fc3d4c 65 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 66 return SvPV(tmpsv,n_a);
4633a7c4
LW		 67}
68
76e3520e 69STATIC OP *
cea2e8a9 70S_no_fh_allowed(pTHX_ OP *o)
79072805 71{
cea2e8a9 72 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 73 PL_op_desc[o->op_type]));
11343788 74 return o;
79072805
LW		 75}
76
76e3520e 77STATIC OP *
cea2e8a9 78S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 79{
cea2e8a9 80 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 81 return o;
79072805
LW		 82}
83
76e3520e 84STATIC OP *
cea2e8a9 85S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 86{
cea2e8a9 87 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 88 return o;
79072805
LW		 89}
90
76e3520e 91STATIC void
cea2e8a9 92S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 93{
cea2e8a9 94 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 95 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 96}
97
7a52d87a 98STATIC void
cea2e8a9 99S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 100{
5a844595
GS		 101 qerror(Perl_mess(aTHX_
102 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 103 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 104}
105
79072805
LW		 106/* "register" allocation */
107
108PADOFFSET
864dbfa3 109Perl_pad_allocmy(pTHX_ char *name)
93a17b20 110{
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
fd400ab9 116 (PL_hints & HINT_UTF8 && UTF8_IS_START(name[1])) ||
155aba94 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,
1c846c1f 153 "\"%s\" variable %s masks earlier declaration in same %s",
33633739
GS		 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) {
635bab04 162 do {
33633739
GS		 163 if ((sv = svp[off])
164 && sv != &PL_sv_undef
5ce0178e 165 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 166 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
167 && strEQ(name, SvPVX(sv)))
f472eb5c 168 {
e476b1b5 169 Perl_warner(aTHX_ WARN_MISC,
33633739 170 "\"our\" variable %s redeclared", name);
e476b1b5 171 Perl_warner(aTHX_ WARN_MISC,
cc507455 172 "\t(Did you mean \"local\" instead of \"our\"?)\n");
33633739 173 break;
f472eb5c 174 }
635bab04 175 } while ( off-- > 0 );
b1cb66bf 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"));
524189f1 186 SvFLAGS(sv) |= SVpad_TYPED;
c750a3ec 187 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22 188 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
c750a3ec 189 }
f472eb5c
GS		 190 if (PL_in_my == KEY_our) {
191 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 192 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 193 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 194 }
3280af22 195 av_store(PL_comppad_name, off, sv);
65202027 196 SvNVX(sv) = (NV)PAD_MAX;
8990e307 197 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 198 if (!PL_min_intro_pending)
199 PL_min_intro_pending = off;
200 PL_max_intro_pending = off;
93a17b20 201 if (*name == '@')
3280af22 202 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 203 else if (*name == '%')
3280af22
NIS		 204 av_store(PL_comppad, off, (SV*)newHV());
205 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 206 return off;
207}
208
94f23f41
GS		 209STATIC PADOFFSET
210S_pad_addlex(pTHX_ SV *proto_namesv)
211{
212 SV *namesv = NEWSV(1103,0);
213 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
214 sv_upgrade(namesv, SVt_PVNV);
215 sv_setpv(namesv, SvPVX(proto_namesv));
216 av_store(PL_comppad_name, newoff, namesv);
217 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
218 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
219 SvFAKE_on(namesv); /* A ref, not a real var */
220 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
221 SvFLAGS(namesv) |= SVpad_OUR;
222 (void)SvUPGRADE(namesv, SVt_PVGV);
223 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
224 }
524189f1
JH		 225 if (SvFLAGS(proto_namesv) & SVpad_TYPED) { /* A typed lexical */
226 SvFLAGS(namesv) |= SVpad_TYPED;
94f23f41
GS		 227 (void)SvUPGRADE(namesv, SVt_PVMG);
228 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
94f23f41
GS		 229 }
230 return newoff;
231}
232
2680586e
GS		 233#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
234
76e3520e 235STATIC PADOFFSET
cea2e8a9 236S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 237 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 238{
748a9306 239 CV *cv;
93a17b20
LW		 240 I32 off;
241 SV *sv;
93a17b20 242 register I32 i;
c09156bb 243 register PERL_CONTEXT *cx;
93a17b20 244
748a9306 245 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 246 AV *curlist = CvPADLIST(cv);
247 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 248 AV *curname;
4fdae800 249
3280af22 250 if (!svp || *svp == &PL_sv_undef)
4633a7c4 251 continue;
748a9306
LW		 252 curname = (AV*)*svp;
253 svp = AvARRAY(curname);
93965878 254 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 255 if ((sv = svp[off]) &&
3280af22 256 sv != &PL_sv_undef &&
748a9306 257 seq <= SvIVX(sv) &&
13826f2c 258 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 259 strEQ(SvPVX(sv), name))
260 {
5f05dabc 261 I32 depth;
262 AV *oldpad;
263 SV *oldsv;
264
265 depth = CvDEPTH(cv);
266 if (!depth) {
9607fc9c 267 if (newoff) {
268 if (SvFAKE(sv))
269 continue;
4fdae800 270 return 0; /* don't clone from inactive stack frame */
9607fc9c 271 }
5f05dabc 272 depth = 1;
273 }
94f23f41 274 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 275 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 276 if (!newoff) { /* Not a mere clone operation. */
94f23f41 277 newoff = pad_addlex(sv);
3280af22 278 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 279 /* "It's closures all the way down." */
3280af22 280 CvCLONE_on(PL_compcv);
54310121 281 if (cv == startcv) {
3280af22 282 if (CvANON(PL_compcv))
54310121 283 oldsv = Nullsv; /* no need to keep ref */
284 }
285 else {
28757baa 286 CV *bcv;
287 for (bcv = startcv;
288 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 289 bcv = CvOUTSIDE(bcv))
290 {
94f23f41
GS		 291 if (CvANON(bcv)) {
292 /* install the missing pad entry in intervening
293 * nested subs and mark them cloneable.
294 * XXX fix pad_foo() to not use globals */
295 AV *ocomppad_name = PL_comppad_name;
296 AV *ocomppad = PL_comppad;
297 SV **ocurpad = PL_curpad;
298 AV *padlist = CvPADLIST(bcv);
299 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
300 PL_comppad = (AV*)AvARRAY(padlist)[1];
301 PL_curpad = AvARRAY(PL_comppad);
302 pad_addlex(sv);
303 PL_comppad_name = ocomppad_name;
304 PL_comppad = ocomppad;
305 PL_curpad = ocurpad;
28757baa 306 CvCLONE_on(bcv);
94f23f41 307 }
28757baa 308 else {
6b35e009
GS		 309 if (ckWARN(WARN_CLOSURE)
310 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
311 {
cea2e8a9 312 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 313 "Variable \"%s\" may be unavailable",
28757baa 314 name);
6b35e009 315 }
28757baa 316 break;
317 }
318 }
319 }
320 }
3280af22 321 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 322 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
323 && !(SvFLAGS(sv) & SVpad_OUR))
324 {
cea2e8a9 325 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 326 "Variable \"%s\" will not stay shared", name);
741b6338 327 }
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 348 if (i == 0 && saweval) {
2680586e 349 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 350 }
93a17b20
LW		 351 break;
352 case CXt_EVAL:
44a8e56a 353 switch (cx->blk_eval.old_op_type) {
354 case OP_ENTEREVAL:
2090ab20
JH		 355 if (CxREALEVAL(cx)) {
356 PADOFFSET off;
6b35e009 357 saweval = i;
2090ab20
JH		 358 seq = cxstack[i].blk_oldcop->cop_seq;
359 startcv = cxstack[i].blk_eval.cv;
c975facc
JH		 360 if (startcv && CvOUTSIDE(startcv)) {
361 off = pad_findlex(name, newoff, seq, CvOUTSIDE(startcv),
362 i-1, saweval, 0);
363 if (off) /* continue looking if not found here */
364 return off;
365 }
2090ab20 366 }
44a8e56a 367 break;
faa7e5bb 368 case OP_DOFILE:
44a8e56a 369 case OP_REQUIRE:
faa7e5bb 370 /* require/do must have their own scope */
44a8e56a 371 return 0;
372 }
93a17b20 373 break;
7766f137 374 case CXt_FORMAT:
93a17b20
LW		 375 case CXt_SUB:
376 if (!saweval)
377 return 0;
378 cv = cx->blk_sub.cv;
3280af22 379 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 380 saweval = i; /* so we know where we were called from */
708c0d06 381 seq = cxstack[i].blk_oldcop->cop_seq;
93a17b20 382 continue;
93a17b20 383 }
2680586e 384 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 385 }
386 }
387
748a9306
LW		 388 return 0;
389}
a0d0e21e 390
748a9306 391PADOFFSET
864dbfa3 392Perl_pad_findmy(pTHX_ char *name)
748a9306
LW		 393{
394 I32 off;
54310121 395 I32 pendoff = 0;
748a9306 396 SV *sv;
3280af22
NIS		 397 SV **svp = AvARRAY(PL_comppad_name);
398 U32 seq = PL_cop_seqmax;
6b35e009 399 PERL_CONTEXT *cx;
33b8ce05 400 CV *outside;
748a9306 401
11343788
MB		 402#ifdef USE_THREADS
403 /*
404 * Special case to get lexical (and hence per-thread) @_.
405 * XXX I need to find out how to tell at parse-time whether use
406 * of @_ should refer to a lexical (from a sub) or defgv (global
407 * scope and maybe weird sub-ish things like formats). See
408 * startsub in perly.y. It's possible that @_ could be lexical
409 * (at least from subs) even in non-threaded perl.
410 */
411 if (strEQ(name, "@_"))
412 return 0; /* success. (NOT_IN_PAD indicates failure) */
413#endif /* USE_THREADS */
414
748a9306 415 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 416 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 417 if ((sv = svp[off]) &&
3280af22 418 sv != &PL_sv_undef &&
54310121 419 (!SvIVX(sv) ||
420 (seq <= SvIVX(sv) &&
421 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 422 strEQ(SvPVX(sv), name))
423 {
77ca0c92 424 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 425 return (PADOFFSET)off;
426 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 427 }
428 }
748a9306 429
33b8ce05
GS		 430 outside = CvOUTSIDE(PL_compcv);
431
432 /* Check if if we're compiling an eval'', and adjust seq to be the
433 * eval's seq number. This depends on eval'' having a non-null
434 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 435 * identified by CvEVAL being true and CvGV being null. */
436 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 437 cx = &cxstack[cxstack_ix];
438 if (CxREALEVAL(cx))
439 seq = cx->blk_oldcop->cop_seq;
440 }
441
748a9306 442 /* See if it's in a nested scope */
2680586e 443 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 444 if (off) {
445 /* If there is a pending local definition, this new alias must die */
446 if (pendoff)
3280af22 447 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 448 return off; /* pad_findlex returns 0 for failure...*/
54310121 449 }
11343788 450 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 451}
452
453void
864dbfa3 454Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20
LW		 455{
456 I32 off;
3280af22 457 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 458 SV *sv;
3280af22
NIS		 459 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
460 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 461 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
462 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 463 }
464 }
465 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 466 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 467 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 468 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 469 }
470}
471
472PADOFFSET
864dbfa3 473Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805
LW		 474{
475 SV *sv;
476 I32 retval;
477
3280af22 478 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 479 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 480 if (PL_pad_reset_pending)
a0d0e21e 481 pad_reset();
ed6116ce 482 if (tmptype & SVs_PADMY) {
79072805 483 do {
3280af22 484 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 485 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 486 retval = AvFILLp(PL_comppad);
79072805
LW		 487 }
488 else {
3280af22
NIS		 489 SV **names = AvARRAY(PL_comppad_name);
490 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 491 for (;;) {
492 /*
493 * "foreach" index vars temporarily become aliases to non-"my"
494 * values. Thus we must skip, not just pad values that are
495 * marked as current pad values, but also those with names.
496 */
3280af22
NIS		 497 if (++PL_padix <= names_fill &&
498 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 499 continue;
3280af22 500 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
3049cdab
SB		 501 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) &&
502 !IS_PADGV(sv) && !IS_PADCONST(sv))
bbce6d69 503 break;
504 }
3280af22 505 retval = PL_padix;
79072805 506 }
8990e307 507 SvFLAGS(sv) |= tmptype;
3280af22 508 PL_curpad = AvARRAY(PL_comppad);
11343788 509#ifdef USE_THREADS
b900a521
JH		 510 DEBUG_X(PerlIO_printf(Perl_debug_log,
511 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
512 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 513 (long) retval, PL_op_name[optype]));
11343788 514#else
b900a521
JH		 515 DEBUG_X(PerlIO_printf(Perl_debug_log,
516 "Pad 0x%"UVxf" alloc %ld for %s\n",
517 PTR2UV(PL_curpad),
22c35a8c 518 (long) retval, PL_op_name[optype]));
11343788 519#endif /* USE_THREADS */
79072805
LW		 520 return (PADOFFSET)retval;
521}
522
523SV *
864dbfa3 524Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 525{
11343788 526#ifdef USE_THREADS
b900a521 527 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 528 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
529 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 530#else
79072805 531 if (!po)
cea2e8a9 532 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 533 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
534 PTR2UV(PL_curpad), (IV)po));
11343788 535#endif /* USE_THREADS */
3280af22 536 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 537}
538
539void
864dbfa3 540Perl_pad_free(pTHX_ PADOFFSET po)
79072805 541{
3280af22 542 if (!PL_curpad)
a0d0e21e 543 return;
3280af22 544 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 545 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 546 if (!po)
cea2e8a9 547 Perl_croak(aTHX_ "panic: pad_free po");
11343788 548#ifdef USE_THREADS
b900a521 549 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 550 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 551 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 552#else
97835f67
JH		 553 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
554 PTR2UV(PL_curpad), (IV)po));
11343788 555#endif /* USE_THREADS */
2aa1bedc 556 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 557 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 558#ifdef USE_ITHREADS
559 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
560#endif
561 }
3280af22
NIS		 562 if ((I32)po < PL_padix)
563 PL_padix = po - 1;
79072805
LW		 564}
565
566void
864dbfa3 567Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 568{
3280af22 569 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 570 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 571 if (!po)
cea2e8a9 572 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 573#ifdef USE_THREADS
b900a521 574 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 575 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
576 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 577#else
97835f67
JH		 578 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
579 PTR2UV(PL_curpad), (IV)po));
11343788 580#endif /* USE_THREADS */
3280af22
NIS		 581 SvPADTMP_off(PL_curpad[po]);
582 PL_curpad[po] = NEWSV(1107,0);
583 SvPADTMP_on(PL_curpad[po]);
584 if ((I32)po < PL_padix)
585 PL_padix = po - 1;
79072805
LW		 586}
587
d9bb4600
GS		 588/* XXX pad_reset() is currently disabled because it results in serious bugs.
589 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
590 * on the stack by OPs that use them, there are several ways to get an alias
591 * to a shared TARG. Such an alias will change randomly and unpredictably.
592 * We avoid doing this until we can think of a Better Way.
593 * GSAR 97-10-29 */
79072805 594void
864dbfa3 595Perl_pad_reset(pTHX)
79072805 596{
d9bb4600 597#ifdef USE_BROKEN_PAD_RESET
79072805
LW		 598 register I32 po;
599
6b88bc9c 600 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 601 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 602#ifdef USE_THREADS
b900a521
JH		 603 DEBUG_X(PerlIO_printf(Perl_debug_log,
604 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
605 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 606#else
b900a521
JH		 607 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
608 PTR2UV(PL_curpad)));
11343788 609#endif /* USE_THREADS */
6b88bc9c
GS		 610 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
611 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
612 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
613 SvPADTMP_off(PL_curpad[po]);
748a9306 614 }
6b88bc9c 615 PL_padix = PL_padix_floor;
79072805 616 }
d9bb4600 617#endif
3280af22 618 PL_pad_reset_pending = FALSE;
79072805
LW		 619}
620
a863c7d1 621#ifdef USE_THREADS
54b9620d 622/* find_threadsv is not reentrant */
a863c7d1 623PADOFFSET
864dbfa3 624Perl_find_threadsv(pTHX_ const char *name)
a863c7d1 625{
a863c7d1
MB		 626 char *p;
627 PADOFFSET key;
554b3eca 628 SV **svp;
54b9620d 629 /* We currently only handle names of a single character */
533c011a 630 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 631 if (!p)
632 return NOT_IN_PAD;
533c011a 633 key = p - PL_threadsv_names;
2d8e6c8d 634 MUTEX_LOCK(&thr->mutex);
54b9620d 635 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 636 if (svp)
637 MUTEX_UNLOCK(&thr->mutex);
638 else {
554b3eca 639 SV *sv = NEWSV(0, 0);
54b9620d 640 av_store(thr->threadsv, key, sv);
940cb80d 641 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 642 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 643 /*
644 * Some magic variables used to be automagically initialised
645 * in gv_fetchpv. Those which are now per-thread magicals get
646 * initialised here instead.
647 */
648 switch (*name) {
54b9620d
MB		 649 case '_':
650 break;
554b3eca
MB		 651 case ';':
652 sv_setpv(sv, "\034");
14befaf4 653 sv_magic(sv, 0, PERL_MAGIC_sv, name, 1);
554b3eca 654 break;
c277df42
IZ		 655 case '&':
656 case '`':
657 case '\'':
533c011a 658 PL_sawampersand = TRUE;
a3f914c5
GS		 659 /* FALL THROUGH */
660 case '1':
661 case '2':
662 case '3':
663 case '4':
664 case '5':
665 case '6':
666 case '7':
667 case '8':
668 case '9':
c277df42 669 SvREADONLY_on(sv);
d8b5173a 670 /* FALL THROUGH */
067391ea
GS		 671
672 /* XXX %! tied to Errno.pm needs to be added here.
673 * See gv_fetchpv(). */
674 /* case '!': */
675
54b9620d 676 default:
14befaf4 677 sv_magic(sv, 0, PERL_MAGIC_sv, name, 1);
554b3eca 678 }
bf49b057 679 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 680 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 681 sv, (*name < 32) ? "^" : "",
682 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 683 }
684 return key;
685}
686#endif /* USE_THREADS */
687
79072805
LW		 688/* Destructor */
689
690void
864dbfa3 691Perl_op_free(pTHX_ OP *o)
79072805 692{
85e6fe83 693 register OP *kid, *nextkid;
acb36ea4 694 OPCODE type;
79072805 695
5dc0d613 696 if (!o || o->op_seq == (U16)-1)
79072805
LW		 697 return;
698
7934575e
GS		 699 if (o->op_private & OPpREFCOUNTED) {
700 switch (o->op_type) {
701 case OP_LEAVESUB:
702 case OP_LEAVESUBLV:
703 case OP_LEAVEEVAL:
704 case OP_LEAVE:
705 case OP_SCOPE:
706 case OP_LEAVEWRITE:
707 OP_REFCNT_LOCK;
708 if (OpREFCNT_dec(o)) {
709 OP_REFCNT_UNLOCK;
710 return;
711 }
712 OP_REFCNT_UNLOCK;
713 break;
714 default:
715 break;
716 }
717 }
718
11343788
MB		 719 if (o->op_flags & OPf_KIDS) {
720 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 721 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 722 op_free(kid);
85e6fe83 723 }
79072805 724 }
acb36ea4
GS		 725 type = o->op_type;
726 if (type == OP_NULL)
727 type = o->op_targ;
728
729 /* COP* is not cleared by op_clear() so that we may track line
730 * numbers etc even after null() */
731 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
732 cop_free((COP*)o);
733
734 op_clear(o);
735
736#ifdef PL_OP_SLAB_ALLOC
737 if ((char *) o == PL_OpPtr)
738 {
739 }
740#else
741 Safefree(o);
742#endif
743}
79072805 744
93c66552
DM		 745void
746Perl_op_clear(pTHX_ OP *o)
acb36ea4 747{
11343788 748 switch (o->op_type) {
acb36ea4
GS		 749 case OP_NULL: /* Was holding old type, if any. */
750 case OP_ENTEREVAL: /* Was holding hints. */
751#ifdef USE_THREADS
752 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
753#endif
754 o->op_targ = 0;
a0d0e21e 755 break;
554b3eca 756#ifdef USE_THREADS
8dd3ba40
SM		 757 case OP_ENTERITER:
758 if (!(o->op_flags & OPf_SPECIAL))
759 break;
760 /* FALL THROUGH */
554b3eca 761#endif /* USE_THREADS */
a6006777 762 default:
ac4c12e7 763 if (!(o->op_flags & OPf_REF)
0b94c7bb 764 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 765 break;
766 /* FALL THROUGH */
463ee0b2 767 case OP_GVSV:
79072805 768 case OP_GV:
a6006777 769 case OP_AELEMFAST:
350de78d 770#ifdef USE_ITHREADS
971a9dd3
GS		 771 if (cPADOPo->op_padix > 0) {
772 if (PL_curpad) {
638eceb6 773 GV *gv = cGVOPo_gv;
971a9dd3
GS		 774 pad_swipe(cPADOPo->op_padix);
775 /* No GvIN_PAD_off(gv) here, because other references may still
776 * exist on the pad */
777 SvREFCNT_dec(gv);
778 }
779 cPADOPo->op_padix = 0;
780 }
350de78d 781#else
971a9dd3 782 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 783 cSVOPo->op_sv = Nullsv;
350de78d 784#endif
79072805 785 break;
a1ae71d2 786 case OP_METHOD_NAMED:
79072805 787 case OP_CONST:
11343788 788 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 789 cSVOPo->op_sv = Nullsv;
79072805 790 break;
748a9306
LW		 791 case OP_GOTO:
792 case OP_NEXT:
793 case OP_LAST:
794 case OP_REDO:
11343788 795 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 796 break;
797 /* FALL THROUGH */
a0d0e21e 798 case OP_TRANS:
acb36ea4 799 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 800 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 801 cSVOPo->op_sv = Nullsv;
802 }
803 else {
a0ed51b3 804 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 805 cPVOPo->op_pv = Nullch;
806 }
a0d0e21e
LW		 807 break;
808 case OP_SUBST:
11343788 809 op_free(cPMOPo->op_pmreplroot);
971a9dd3 810 goto clear_pmop;
748a9306 811 case OP_PUSHRE:
971a9dd3
GS		 812#ifdef USE_ITHREADS
813 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
814 if (PL_curpad) {
815 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
816 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
817 /* No GvIN_PAD_off(gv) here, because other references may still
818 * exist on the pad */
819 SvREFCNT_dec(gv);
820 }
821 }
822#else
823 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
824#endif
825 /* FALL THROUGH */
a0d0e21e 826 case OP_MATCH:
8782bef2 827 case OP_QR:
971a9dd3 828clear_pmop:
cb55de95
JH		 829 {
830 HV *pmstash = PmopSTASH(cPMOPo);
831 if (pmstash && SvREFCNT(pmstash)) {
832 PMOP *pmop = HvPMROOT(pmstash);
833 PMOP *lastpmop = NULL;
834 while (pmop) {
835 if (cPMOPo == pmop) {
836 if (lastpmop)
837 lastpmop->op_pmnext = pmop->op_pmnext;
838 else
839 HvPMROOT(pmstash) = pmop->op_pmnext;
840 break;
841 }
842 lastpmop = pmop;
843 pmop = pmop->op_pmnext;
844 }
845#ifdef USE_ITHREADS
846 Safefree(PmopSTASHPV(cPMOPo));
847#else
848 /* NOTE: PMOP.op_pmstash is not refcounted */
849#endif
850 }
851 }
971a9dd3 852 cPMOPo->op_pmreplroot = Nullop;
aaa362c4
RS		 853 ReREFCNT_dec(PM_GETRE(cPMOPo));
854 PM_SETRE(cPMOPo, (REGEXP*)NULL);
a0d0e21e 855 break;
79072805
LW		 856 }
857
743e66e6 858 if (o->op_targ > 0) {
11343788 859 pad_free(o->op_targ);
743e66e6
GS		 860 o->op_targ = 0;
861 }
79072805
LW		 862}
863
76e3520e 864STATIC void
3eb57f73
HS		 865S_cop_free(pTHX_ COP* cop)
866{
867 Safefree(cop->cop_label);
57843af0 868#ifdef USE_ITHREADS
f4dd75d9
GS		 869 Safefree(CopFILE(cop)); /* XXX share in a pvtable? */
870 Safefree(CopSTASHPV(cop)); /* XXX share in a pvtable? */
57843af0 871#else
11faa288 872 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 873 SvREFCNT_dec(CopFILEGV(cop));
57843af0 874#endif
0453d815 875 if (! specialWARN(cop->cop_warnings))
3eb57f73 876 SvREFCNT_dec(cop->cop_warnings);
ac27b0f5
NIS		 877 if (! specialCopIO(cop->cop_io))
878 SvREFCNT_dec(cop->cop_io);
3eb57f73
HS		 879}
880
93c66552
DM		 881void
882Perl_op_null(pTHX_ OP *o)
8990e307 883{
acb36ea4
GS		 884 if (o->op_type == OP_NULL)
885 return;
886 op_clear(o);
11343788
MB		 887 o->op_targ = o->op_type;
888 o->op_type = OP_NULL;
22c35a8c 889 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 890}
891
79072805
LW		 892/* Contextualizers */
893
463ee0b2 894#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 895
896OP *
864dbfa3 897Perl_linklist(pTHX_ OP *o)
79072805
LW		 898{
899 register OP *kid;
900
11343788
MB		 901 if (o->op_next)
902 return o->op_next;
79072805
LW		 903
904 /* establish postfix order */
11343788
MB		 905 if (cUNOPo->op_first) {
906 o->op_next = LINKLIST(cUNOPo->op_first);
907 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 908 if (kid->op_sibling)
909 kid->op_next = LINKLIST(kid->op_sibling);
910 else
11343788 911 kid->op_next = o;
79072805
LW		 912 }
913 }
914 else
11343788 915 o->op_next = o;
79072805 916
11343788 917 return o->op_next;
79072805
LW		 918}
919
920OP *
864dbfa3 921Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 922{
923 OP *kid;
11343788
MB		 924 if (o && o->op_flags & OPf_KIDS) {
925 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 926 scalar(kid);
927 }
11343788 928 return o;
79072805
LW		 929}
930
76e3520e 931STATIC OP *
cea2e8a9 932S_scalarboolean(pTHX_ OP *o)
8990e307 933{
d008e5eb 934 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
d008e5eb 935 if (ckWARN(WARN_SYNTAX)) {
57843af0 936 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 937
d008e5eb 938 if (PL_copline != NOLINE)
57843af0 939 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 940 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 941 CopLINE_set(PL_curcop, oldline);
d008e5eb 942 }
a0d0e21e 943 }
11343788 944 return scalar(o);
8990e307
LW		 945}
946
947OP *
864dbfa3 948Perl_scalar(pTHX_ OP *o)
79072805
LW		 949{
950 OP *kid;
951
a0d0e21e 952 /* assumes no premature commitment */
3280af22 953 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 954 || o->op_type == OP_RETURN)
7e363e51 955 {
11343788 956 return o;
7e363e51 957 }
79072805 958
5dc0d613 959 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 960
11343788 961 switch (o->op_type) {
79072805 962 case OP_REPEAT:
11343788 963 scalar(cBINOPo->op_first);
8990e307 964 break;
79072805
LW		 965 case OP_OR:
966 case OP_AND:
967 case OP_COND_EXPR:
11343788 968 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 969 scalar(kid);
79072805 970 break;
a0d0e21e 971 case OP_SPLIT:
11343788 972 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 973 if (!kPMOP->op_pmreplroot)
974 deprecate("implicit split to @_");
975 }
976 /* FALL THROUGH */
79072805 977 case OP_MATCH:
8782bef2 978 case OP_QR:
79072805
LW		 979 case OP_SUBST:
980 case OP_NULL:
8990e307 981 default:
11343788
MB		 982 if (o->op_flags & OPf_KIDS) {
983 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 984 scalar(kid);
985 }
79072805
LW		 986 break;
987 case OP_LEAVE:
988 case OP_LEAVETRY:
5dc0d613 989 kid = cLISTOPo->op_first;
54310121 990 scalar(kid);
155aba94 991 while ((kid = kid->op_sibling)) {
54310121 992 if (kid->op_sibling)
993 scalarvoid(kid);
994 else
995 scalar(kid);
996 }
3280af22 997 WITH_THR(PL_curcop = &PL_compiling);
54310121 998 break;
748a9306 999 case OP_SCOPE:
79072805 1000 case OP_LINESEQ:
8990e307 1001 case OP_LIST:
11343788 1002 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1003 if (kid->op_sibling)
1004 scalarvoid(kid);
1005 else
1006 scalar(kid);
1007 }
3280af22 1008 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 1009 break;
1010 }
11343788 1011 return o;
79072805
LW		 1012}
1013
1014OP *
864dbfa3 1015Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 1016{
1017 OP *kid;
8990e307
LW		 1018 char* useless = 0;
1019 SV* sv;
2ebea0a1
GS		 1020 U8 want;
1021
acb36ea4
GS		 1022 if (o->op_type == OP_NEXTSTATE
1023 || o->op_type == OP_SETSTATE
1024 || o->op_type == OP_DBSTATE
1025 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1026 || o->op_targ == OP_SETSTATE
1027 || o->op_targ == OP_DBSTATE)))
2ebea0a1 1028 PL_curcop = (COP*)o; /* for warning below */
79072805 1029
54310121 1030 /* assumes no premature commitment */
2ebea0a1
GS		 1031 want = o->op_flags & OPf_WANT;
1032 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1033 || o->op_type == OP_RETURN)
7e363e51 1034 {
11343788 1035 return o;
7e363e51 1036 }
79072805 1037
b162f9ea 1038 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1039 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1040 {
b162f9ea 1041 return scalar(o); /* As if inside SASSIGN */
7e363e51 1042 }
1c846c1f 1043
5dc0d613 1044 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1045
11343788 1046 switch (o->op_type) {
79072805 1047 default:
22c35a8c 1048 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1049 break;
36477c24 1050 /* FALL THROUGH */
1051 case OP_REPEAT:
11343788 1052 if (o->op_flags & OPf_STACKED)
8990e307 1053 break;
5d82c453
GA		 1054 goto func_ops;
1055 case OP_SUBSTR:
1056 if (o->op_private == 4)
1057 break;
8990e307
LW		 1058 /* FALL THROUGH */
1059 case OP_GVSV:
1060 case OP_WANTARRAY:
1061 case OP_GV:
1062 case OP_PADSV:
1063 case OP_PADAV:
1064 case OP_PADHV:
1065 case OP_PADANY:
1066 case OP_AV2ARYLEN:
8990e307 1067 case OP_REF:
a0d0e21e
LW		 1068 case OP_REFGEN:
1069 case OP_SREFGEN:
8990e307
LW		 1070 case OP_DEFINED:
1071 case OP_HEX:
1072 case OP_OCT:
1073 case OP_LENGTH:
8990e307
LW		 1074 case OP_VEC:
1075 case OP_INDEX:
1076 case OP_RINDEX:
1077 case OP_SPRINTF:
1078 case OP_AELEM:
1079 case OP_AELEMFAST:
1080 case OP_ASLICE:
8990e307
LW		 1081 case OP_HELEM:
1082 case OP_HSLICE:
1083 case OP_UNPACK:
1084 case OP_PACK:
8990e307
LW		 1085 case OP_JOIN:
1086 case OP_LSLICE:
1087 case OP_ANONLIST:
1088 case OP_ANONHASH:
1089 case OP_SORT:
1090 case OP_REVERSE:
1091 case OP_RANGE:
1092 case OP_FLIP:
1093 case OP_FLOP:
1094 case OP_CALLER:
1095 case OP_FILENO:
1096 case OP_EOF:
1097 case OP_TELL:
1098 case OP_GETSOCKNAME:
1099 case OP_GETPEERNAME:
1100 case OP_READLINK:
1101 case OP_TELLDIR:
1102 case OP_GETPPID:
1103 case OP_GETPGRP:
1104 case OP_GETPRIORITY:
1105 case OP_TIME:
1106 case OP_TMS:
1107 case OP_LOCALTIME:
1108 case OP_GMTIME:
1109 case OP_GHBYNAME:
1110 case OP_GHBYADDR:
1111 case OP_GHOSTENT:
1112 case OP_GNBYNAME:
1113 case OP_GNBYADDR:
1114 case OP_GNETENT:
1115 case OP_GPBYNAME:
1116 case OP_GPBYNUMBER:
1117 case OP_GPROTOENT:
1118 case OP_GSBYNAME:
1119 case OP_GSBYPORT:
1120 case OP_GSERVENT:
1121 case OP_GPWNAM:
1122 case OP_GPWUID:
1123 case OP_GGRNAM:
1124 case OP_GGRGID:
1125 case OP_GETLOGIN:
5d82c453 1126 func_ops:
64aac5a9 1127 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1128 useless = PL_op_desc[o->op_type];
8990e307
LW		 1129 break;
1130
1131 case OP_RV2GV:
1132 case OP_RV2SV:
1133 case OP_RV2AV:
1134 case OP_RV2HV:
192587c2 1135 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1136 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1137 useless = "a variable";
1138 break;
79072805
LW		 1139
1140 case OP_CONST:
7766f137 1141 sv = cSVOPo_sv;
7a52d87a
GS		 1142 if (cSVOPo->op_private & OPpCONST_STRICT)
1143 no_bareword_allowed(o);
1144 else {
d008e5eb
GS		 1145 if (ckWARN(WARN_VOID)) {
1146 useless = "a constant";
960b4253
MG		 1147 /* the constants 0 and 1 are permitted as they are
1148 conventionally used as dummies in constructs like
1149 1 while some_condition_with_side_effects; */
d008e5eb
GS		 1150 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1151 useless = 0;
1152 else if (SvPOK(sv)) {
a52fe3ac
A		 1153 /* perl4's way of mixing documentation and code
1154 (before the invention of POD) was based on a
1155 trick to mix nroff and perl code. The trick was
1156 built upon these three nroff macros being used in
1157 void context. The pink camel has the details in
1158 the script wrapman near page 319. */
d008e5eb
GS		 1159 if (strnEQ(SvPVX(sv), "di", 2) ||
1160 strnEQ(SvPVX(sv), "ds", 2) ||
1161 strnEQ(SvPVX(sv), "ig", 2))
1162 useless = 0;
1163 }
8990e307
LW		 1164 }
1165 }
93c66552 1166 op_null(o); /* don't execute or even remember it */
79072805
LW		 1167 break;
1168
1169 case OP_POSTINC:
11343788 1170 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1171 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1172 break;
1173
1174 case OP_POSTDEC:
11343788 1175 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1176 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1177 break;
1178
79072805
LW		 1179 case OP_OR:
1180 case OP_AND:
1181 case OP_COND_EXPR:
11343788 1182 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1183 scalarvoid(kid);
1184 break;
5aabfad6 1185
a0d0e21e 1186 case OP_NULL:
11343788 1187 if (o->op_flags & OPf_STACKED)
a0d0e21e 1188 break;
5aabfad6 1189 /* FALL THROUGH */
2ebea0a1
GS		 1190 case OP_NEXTSTATE:
1191 case OP_DBSTATE:
79072805
LW		 1192 case OP_ENTERTRY:
1193 case OP_ENTER:
11343788 1194 if (!(o->op_flags & OPf_KIDS))
79072805 1195 break;
54310121 1196 /* FALL THROUGH */
463ee0b2 1197 case OP_SCOPE:
79072805
LW		 1198 case OP_LEAVE:
1199 case OP_LEAVETRY:
a0d0e21e 1200 case OP_LEAVELOOP:
79072805 1201 case OP_LINESEQ:
79072805 1202 case OP_LIST:
11343788 1203 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1204 scalarvoid(kid);
1205 break;
c90c0ff4 1206 case OP_ENTEREVAL:
5196be3e 1207 scalarkids(o);
c90c0ff4 1208 break;
5aabfad6 1209 case OP_REQUIRE:
c90c0ff4 1210 /* all requires must return a boolean value */
5196be3e 1211 o->op_flags &= ~OPf_WANT;
d6483035
GS		 1212 /* FALL THROUGH */
1213 case OP_SCALAR:
5196be3e 1214 return scalar(o);
a0d0e21e 1215 case OP_SPLIT:
11343788 1216 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1217 if (!kPMOP->op_pmreplroot)
1218 deprecate("implicit split to @_");
1219 }
1220 break;
79072805 1221 }
411caa50
JH		 1222 if (useless && ckWARN(WARN_VOID))
1223 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
11343788 1224 return o;
79072805
LW		 1225}
1226
1227OP *
864dbfa3 1228Perl_listkids(pTHX_ OP *o)
79072805
LW		 1229{
1230 OP *kid;
11343788
MB		 1231 if (o && o->op_flags & OPf_KIDS) {
1232 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1233 list(kid);
1234 }
11343788 1235 return o;
79072805
LW		 1236}
1237
1238OP *
864dbfa3 1239Perl_list(pTHX_ OP *o)
79072805
LW		 1240{
1241 OP *kid;
1242
a0d0e21e 1243 /* assumes no premature commitment */
3280af22 1244 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1245 || o->op_type == OP_RETURN)
7e363e51 1246 {
11343788 1247 return o;
7e363e51 1248 }
79072805 1249
b162f9ea 1250 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1251 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1252 {
b162f9ea 1253 return o; /* As if inside SASSIGN */
7e363e51 1254 }
1c846c1f 1255
5dc0d613 1256 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1257
11343788 1258 switch (o->op_type) {
79072805
LW		 1259 case OP_FLOP:
1260 case OP_REPEAT:
11343788 1261 list(cBINOPo->op_first);
79072805
LW		 1262 break;
1263 case OP_OR:
1264 case OP_AND:
1265 case OP_COND_EXPR:
11343788 1266 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1267 list(kid);
1268 break;
1269 default:
1270 case OP_MATCH:
8782bef2 1271 case OP_QR:
79072805
LW		 1272 case OP_SUBST:
1273 case OP_NULL:
11343788 1274 if (!(o->op_flags & OPf_KIDS))
79072805 1275 break;
11343788
MB		 1276 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1277 list(cBINOPo->op_first);
1278 return gen_constant_list(o);
79072805
LW		 1279 }
1280 case OP_LIST:
11343788 1281 listkids(o);
79072805
LW		 1282 break;
1283 case OP_LEAVE:
1284 case OP_LEAVETRY:
5dc0d613 1285 kid = cLISTOPo->op_first;
54310121 1286 list(kid);
155aba94 1287 while ((kid = kid->op_sibling)) {
54310121 1288 if (kid->op_sibling)
1289 scalarvoid(kid);
1290 else
1291 list(kid);
1292 }
3280af22 1293 WITH_THR(PL_curcop = &PL_compiling);
54310121 1294 break;
748a9306 1295 case OP_SCOPE:
79072805 1296 case OP_LINESEQ:
11343788 1297 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1298 if (kid->op_sibling)
1299 scalarvoid(kid);
1300 else
1301 list(kid);
1302 }
3280af22 1303 WITH_THR(PL_curcop = &PL_compiling);
79072805 1304 break;
c90c0ff4 1305 case OP_REQUIRE:
1306 /* all requires must return a boolean value */
5196be3e
MB		 1307 o->op_flags &= ~OPf_WANT;
1308 return scalar(o);
79072805 1309 }
11343788 1310 return o;
79072805
LW		 1311}
1312
1313OP *
864dbfa3 1314Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1315{
1316 OP *kid;
1317
11343788
MB		 1318 if (o) {
1319 if (o->op_type == OP_LINESEQ ||
1320 o->op_type == OP_SCOPE ||
1321 o->op_type == OP_LEAVE ||
1322 o->op_type == OP_LEAVETRY)
463ee0b2 1323 {
11343788 1324 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1325 if (kid->op_sibling) {
463ee0b2 1326 scalarvoid(kid);
ed6116ce 1327 }
463ee0b2 1328 }
3280af22 1329 PL_curcop = &PL_compiling;
79072805 1330 }
11343788 1331 o->op_flags &= ~OPf_PARENS;
3280af22 1332 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1333 o->op_flags |= OPf_PARENS;
79072805 1334 }
8990e307 1335 else
11343788
MB		 1336 o = newOP(OP_STUB, 0);
1337 return o;
79072805
LW		 1338}
1339
76e3520e 1340STATIC OP *
cea2e8a9 1341S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1342{
1343 OP *kid;
11343788
MB		 1344 if (o && o->op_flags & OPf_KIDS) {
1345 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1346 mod(kid, type);
79072805 1347 }
11343788 1348 return o;
79072805
LW		 1349}
1350
79072805 1351OP *
864dbfa3 1352Perl_mod(pTHX_ OP *o, I32 type)
79072805
LW		 1353{
1354 OP *kid;
2d8e6c8d 1355 STRLEN n_a;
79072805 1356
3280af22 1357 if (!o || PL_error_count)
11343788 1358 return o;
79072805 1359
b162f9ea 1360 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1361 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1362 {
b162f9ea 1363 return o;
7e363e51 1364 }
1c846c1f 1365
11343788 1366 switch (o->op_type) {
68dc0745 1367 case OP_UNDEF:
3280af22 1368 PL_modcount++;
5dc0d613 1369 return o;
a0d0e21e 1370 case OP_CONST:
11343788 1371 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1372 goto nomod;
3280af22 1373 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1374 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1375 PL_eval_start = 0;
a0d0e21e
LW		 1376 }
1377 else if (!type) {
3280af22
NIS		 1378 SAVEI32(PL_compiling.cop_arybase);
1379 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1380 }
1381 else if (type == OP_REFGEN)
1382 goto nomod;
1383 else
cea2e8a9 1384 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1385 break;
5f05dabc 1386 case OP_STUB:
5196be3e 1387 if (o->op_flags & OPf_PARENS)
5f05dabc 1388 break;
1389 goto nomod;
a0d0e21e
LW		 1390 case OP_ENTERSUB:
1391 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1392 !(o->op_flags & OPf_STACKED)) {
1393 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1394 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788 1395 assert(cUNOPo->op_first->op_type == OP_NULL);
93c66552 1396 op_null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1397 break;
1398 }
cd06dffe
GS		 1399 else { /* lvalue subroutine call */
1400 o->op_private |= OPpLVAL_INTRO;
e6438c1a 1401 PL_modcount = RETURN_UNLIMITED_NUMBER;
4978d6d9 1402 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1403 /* Backward compatibility mode: */
1404 o->op_private |= OPpENTERSUB_INARGS;
1405 break;
1406 }
1407 else { /* Compile-time error message: */
1408 OP *kid = cUNOPo->op_first;
1409 CV *cv;
1410 OP *okid;
1411
1412 if (kid->op_type == OP_PUSHMARK)
1413 goto skip_kids;
1414 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1415 Perl_croak(aTHX_
1416 "panic: unexpected lvalue entersub "
1417 "args: type/targ %ld:%ld",
1418 (long)kid->op_type,kid->op_targ);
1419 kid = kLISTOP->op_first;
1420 skip_kids:
1421 while (kid->op_sibling)
1422 kid = kid->op_sibling;
1423 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1424 /* Indirect call */
1425 if (kid->op_type == OP_METHOD_NAMED
1426 || kid->op_type == OP_METHOD)
1427 {
87d7fd28 1428 UNOP *newop;
cd06dffe
GS		 1429
1430 if (kid->op_sibling || kid->op_next != kid) {
1431 yyerror("panic: unexpected optree near method call");
1432 break;
1433 }
1434
87d7fd28 1435 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1436 newop->op_type = OP_RV2CV;
1437 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1438 newop->op_first = Nullop;
1439 newop->op_next = (OP*)newop;
1440 kid->op_sibling = (OP*)newop;
349fd7b7 1441 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1442 break;
1443 }
1c846c1f 1444
cd06dffe
GS		 1445 if (kid->op_type != OP_RV2CV)
1446 Perl_croak(aTHX_
1447 "panic: unexpected lvalue entersub "
1448 "entry via type/targ %ld:%ld",
1449 (long)kid->op_type,kid->op_targ);
1450 kid->op_private |= OPpLVAL_INTRO;
1451 break; /* Postpone until runtime */
1452 }
1453
1454 okid = kid;
1455 kid = kUNOP->op_first;
1456 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1457 kid = kUNOP->op_first;
1458 if (kid->op_type == OP_NULL)
1459 Perl_croak(aTHX_
1460 "Unexpected constant lvalue entersub "
1461 "entry via type/targ %ld:%ld",
1462 (long)kid->op_type,kid->op_targ);
1463 if (kid->op_type != OP_GV) {
1464 /* Restore RV2CV to check lvalueness */
1465 restore_2cv:
1466 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1467 okid->op_next = kid->op_next;
1468 kid->op_next = okid;
1469 }
1470 else
1471 okid->op_next = Nullop;
1472 okid->op_type = OP_RV2CV;
1473 okid->op_targ = 0;
1474 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1475 okid->op_private |= OPpLVAL_INTRO;
1476 break;
1477 }
1478
638eceb6 1479 cv = GvCV(kGVOP_gv);
1c846c1f 1480 if (!cv)
cd06dffe
GS		 1481 goto restore_2cv;
1482 if (CvLVALUE(cv))
1483 break;
1484 }
1485 }
79072805
LW		 1486 /* FALL THROUGH */
1487 default:
a0d0e21e
LW		 1488 nomod:
1489 /* grep, foreach, subcalls, refgen */
1490 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1491 break;
cea2e8a9 1492 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1493 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1494 ? "do block"
1495 : (o->op_type == OP_ENTERSUB
1496 ? "non-lvalue subroutine call"
1497 : PL_op_desc[o->op_type])),
22c35a8c 1498 type ? PL_op_desc[type] : "local"));
11343788 1499 return o;
79072805 1500
a0d0e21e
LW		 1501 case OP_PREINC:
1502 case OP_PREDEC:
1503 case OP_POW:
1504 case OP_MULTIPLY:
1505 case OP_DIVIDE:
1506 case OP_MODULO:
1507 case OP_REPEAT:
1508 case OP_ADD:
1509 case OP_SUBTRACT:
1510 case OP_CONCAT:
1511 case OP_LEFT_SHIFT:
1512 case OP_RIGHT_SHIFT:
1513 case OP_BIT_AND:
1514 case OP_BIT_XOR:
1515 case OP_BIT_OR:
1516 case OP_I_MULTIPLY:
1517 case OP_I_DIVIDE:
1518 case OP_I_MODULO:
1519 case OP_I_ADD:
1520 case OP_I_SUBTRACT:
11343788 1521 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1522 goto nomod;
3280af22 1523 PL_modcount++;
a0d0e21e
LW		 1524 break;
1525
79072805 1526 case OP_COND_EXPR:
11343788 1527 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1528 mod(kid, type);
79072805
LW		 1529 break;
1530
1531 case OP_RV2AV:
1532 case OP_RV2HV:
93af7a87 1533 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1534 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1535 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
e6438c1a 1536 PL_modcount = RETURN_UNLIMITED_NUMBER;
11343788 1537 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1538 }
1539 /* FALL THROUGH */
79072805 1540 case OP_RV2GV:
5dc0d613 1541 if (scalar_mod_type(o, type))
3fe9a6f1 1542 goto nomod;
11343788 1543 ref(cUNOPo->op_first, o->op_type);
79072805 1544 /* FALL THROUGH */
79072805
LW		 1545 case OP_ASLICE:
1546 case OP_HSLICE:
78f9721b
SM		 1547 if (type == OP_LEAVESUBLV)
1548 o->op_private |= OPpMAYBE_LVSUB;
1549 /* FALL THROUGH */
1550 case OP_AASSIGN:
93a17b20
LW		 1551 case OP_NEXTSTATE:
1552 case OP_DBSTATE:
a0d0e21e 1553 case OP_CHOMP:
e6438c1a 1554 PL_modcount = RETURN_UNLIMITED_NUMBER;
79072805 1555 break;
463ee0b2 1556 case OP_RV2SV:
11343788 1557 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1558 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1559 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1560 /* FALL THROUGH */
79072805 1561 case OP_GV:
463ee0b2 1562 case OP_AV2ARYLEN:
3280af22 1563 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1564 case OP_SASSIGN:
bf4b1e52
GS		 1565 case OP_ANDASSIGN:
1566 case OP_ORASSIGN:
8990e307 1567 case OP_AELEMFAST:
3280af22 1568 PL_modcount++;
8990e307
LW		 1569 break;
1570
748a9306
LW		 1571 case OP_PADAV:
1572 case OP_PADHV:
e6438c1a 1573 PL_modcount = RETURN_UNLIMITED_NUMBER;
5196be3e
MB		 1574 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1575 return o; /* Treat \(@foo) like ordinary list. */
1576 if (scalar_mod_type(o, type))
3fe9a6f1 1577 goto nomod;
78f9721b
SM		 1578 if (type == OP_LEAVESUBLV)
1579 o->op_private |= OPpMAYBE_LVSUB;
748a9306
LW		 1580 /* FALL THROUGH */
1581 case OP_PADSV:
3280af22 1582 PL_modcount++;
748a9306 1583 if (!type)
cea2e8a9 1584 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1585 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1586 break;
1587
554b3eca 1588#ifdef USE_THREADS
2faa37cc 1589 case OP_THREADSV:
533c011a 1590 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1591 break;
1592#endif /* USE_THREADS */
1593
748a9306
LW		 1594 case OP_PUSHMARK:
1595 break;
a0d0e21e 1596
69969c6f
SB		 1597 case OP_KEYS:
1598 if (type != OP_SASSIGN)
1599 goto nomod;
5d82c453
GA		 1600 goto lvalue_func;
1601 case OP_SUBSTR:
1602 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1603 goto nomod;
5f05dabc 1604 /* FALL THROUGH */
a0d0e21e 1605 case OP_POS:
463ee0b2 1606 case OP_VEC:
78f9721b
SM		 1607 if (type == OP_LEAVESUBLV)
1608 o->op_private |= OPpMAYBE_LVSUB;
5d82c453 1609 lvalue_func:
11343788
MB		 1610 pad_free(o->op_targ);
1611 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1612 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1613 if (o->op_flags & OPf_KIDS)
1614 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1615 break;
a0d0e21e 1616
463ee0b2
LW		 1617 case OP_AELEM:
1618 case OP_HELEM:
11343788 1619 ref(cBINOPo->op_first, o->op_type);
68dc0745 1620 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1621 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1622 o->op_private |= OPpLVAL_DEFER;
78f9721b
SM		 1623 if (type == OP_LEAVESUBLV)
1624 o->op_private |= OPpMAYBE_LVSUB;
3280af22 1625 PL_modcount++;
463ee0b2
LW		 1626 break;
1627
1628 case OP_SCOPE:
1629 case OP_LEAVE:
1630 case OP_ENTER:
78f9721b 1631 case OP_LINESEQ:
11343788
MB		 1632 if (o->op_flags & OPf_KIDS)
1633 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1634 break;
1635
1636 case OP_NULL:
638bc118
GS		 1637 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1638 goto nomod;
1639 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1640 break;
11343788
MB		 1641 if (o->op_targ != OP_LIST) {
1642 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1643 break;
1644 }
1645 /* FALL THROUGH */
463ee0b2 1646 case OP_LIST:
11343788 1647 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1648 mod(kid, type);
1649 break;
78f9721b
SM		 1650
1651 case OP_RETURN:
1652 if (type != OP_LEAVESUBLV)
1653 goto nomod;
1654 break; /* mod()ing was handled by ck_return() */
463ee0b2 1655 }
78f9721b
SM		 1656 if (type != OP_LEAVESUBLV)
1657 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1658
1659 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1660 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1661 else if (!type) {
11343788
MB		 1662 o->op_private |= OPpLVAL_INTRO;
1663 o->op_flags &= ~OPf_SPECIAL;
3280af22 1664 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1665 }
78f9721b
SM		 1666 else if (type != OP_GREPSTART && type != OP_ENTERSUB
1667 && type != OP_LEAVESUBLV)
11343788
MB		 1668 o->op_flags |= OPf_REF;
1669 return o;
463ee0b2
LW		 1670}
1671
864dbfa3 1672STATIC bool
cea2e8a9 1673S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1674{
1675 switch (type) {
1676 case OP_SASSIGN:
5196be3e 1677 if (o->op_type == OP_RV2GV)
3fe9a6f1 1678 return FALSE;
1679 /* FALL THROUGH */
1680 case OP_PREINC:
1681 case OP_PREDEC:
1682 case OP_POSTINC:
1683 case OP_POSTDEC:
1684 case OP_I_PREINC:
1685 case OP_I_PREDEC:
1686 case OP_I_POSTINC:
1687 case OP_I_POSTDEC:
1688 case OP_POW:
1689 case OP_MULTIPLY:
1690 case OP_DIVIDE:
1691 case OP_MODULO:
1692 case OP_REPEAT:
1693 case OP_ADD:
1694 case OP_SUBTRACT:
1695 case OP_I_MULTIPLY:
1696 case OP_I_DIVIDE:
1697 case OP_I_MODULO:
1698 case OP_I_ADD:
1699 case OP_I_SUBTRACT:
1700 case OP_LEFT_SHIFT:
1701 case OP_RIGHT_SHIFT:
1702 case OP_BIT_AND:
1703 case OP_BIT_XOR:
1704 case OP_BIT_OR:
1705 case OP_CONCAT:
1706 case OP_SUBST:
1707 case OP_TRANS:
49e9fbe6
GS		 1708 case OP_READ:
1709 case OP_SYSREAD:
1710 case OP_RECV:
bf4b1e52
GS		 1711 case OP_ANDASSIGN:
1712 case OP_ORASSIGN:
3fe9a6f1 1713 return TRUE;
1714 default:
1715 return FALSE;
1716 }
1717}
1718
35cd451c 1719STATIC bool
cea2e8a9 1720S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1721{
1722 switch (o->op_type) {
1723 case OP_PIPE_OP:
1724 case OP_SOCKPAIR:
1725 if (argnum == 2)
1726 return TRUE;
1727 /* FALL THROUGH */
1728 case OP_SYSOPEN:
1729 case OP_OPEN:
ded8aa31 1730 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1731 case OP_SOCKET:
1732 case OP_OPEN_DIR:
1733 case OP_ACCEPT:
1734 if (argnum == 1)
1735 return TRUE;
1736 /* FALL THROUGH */
1737 default:
1738 return FALSE;
1739 }
1740}
1741
463ee0b2 1742OP *
864dbfa3 1743Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1744{
1745 OP *kid;
11343788
MB		 1746 if (o && o->op_flags & OPf_KIDS) {
1747 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1748 ref(kid, type);
1749 }
11343788 1750 return o;
463ee0b2
LW		 1751}
1752
1753OP *
864dbfa3 1754Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1755{
1756 OP *kid;
463ee0b2 1757
3280af22 1758 if (!o || PL_error_count)
11343788 1759 return o;
463ee0b2 1760
11343788 1761 switch (o->op_type) {
a0d0e21e 1762 case OP_ENTERSUB:
afebc493 1763 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1764 !(o->op_flags & OPf_STACKED)) {
1765 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1766 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788 1767 assert(cUNOPo->op_first->op_type == OP_NULL);
93c66552 1768 op_null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
11343788 1769 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1770 }
1771 break;
aeea060c 1772
463ee0b2 1773 case OP_COND_EXPR:
11343788 1774 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1775 ref(kid, type);
1776 break;
8990e307 1777 case OP_RV2SV:
35cd451c
GS		 1778 if (type == OP_DEFINED)
1779 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1780 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1781 /* FALL THROUGH */
1782 case OP_PADSV:
5f05dabc 1783 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1784 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1785 : type == OP_RV2HV ? OPpDEREF_HV
1786 : OPpDEREF_SV);
11343788 1787 o->op_flags |= OPf_MOD;
a0d0e21e 1788 }
8990e307 1789 break;
1c846c1f 1790
2faa37cc 1791 case OP_THREADSV:
a863c7d1
MB		 1792 o->op_flags |= OPf_MOD; /* XXX ??? */
1793 break;
1794
463ee0b2
LW		 1795 case OP_RV2AV:
1796 case OP_RV2HV:
aeea060c 1797 o->op_flags |= OPf_REF;
8990e307 1798 /* FALL THROUGH */
463ee0b2 1799 case OP_RV2GV:
35cd451c
GS		 1800 if (type == OP_DEFINED)
1801 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1802 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1803 break;
8990e307 1804
463ee0b2
LW		 1805 case OP_PADAV:
1806 case OP_PADHV:
aeea060c 1807 o->op_flags |= OPf_REF;
79072805 1808 break;
aeea060c 1809
8990e307 1810 case OP_SCALAR:
79072805 1811 case OP_NULL:
11343788 1812 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1813 break;
11343788 1814 ref(cBINOPo->op_first, type);
79072805
LW		 1815 break;
1816 case OP_AELEM:
1817 case OP_HELEM:
11343788 1818 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1819 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1820 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1821 : type == OP_RV2HV ? OPpDEREF_HV
1822 : OPpDEREF_SV);
11343788 1823 o->op_flags |= OPf_MOD;
8990e307 1824 }
79072805
LW		 1825 break;
1826
463ee0b2 1827 case OP_SCOPE:
79072805
LW		 1828 case OP_LEAVE:
1829 case OP_ENTER:
8990e307 1830 case OP_LIST:
11343788 1831 if (!(o->op_flags & OPf_KIDS))
79072805 1832 break;
11343788 1833 ref(cLISTOPo->op_last, type);
79072805 1834 break;
a0d0e21e
LW		 1835 default:
1836 break;
79072805 1837 }
11343788 1838 return scalar(o);
8990e307 1839
79072805
LW		 1840}
1841
09bef843
SB		 1842STATIC OP *
1843S_dup_attrlist(pTHX_ OP *o)
1844{
1845 OP *rop = Nullop;
1846
1847 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1848 * where the first kid is OP_PUSHMARK and the remaining ones
1849 * are OP_CONST. We need to push the OP_CONST values.
1850 */
1851 if (o->op_type == OP_CONST)
1852 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1853 else {
1854 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1855 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1856 if (o->op_type == OP_CONST)
1857 rop = append_elem(OP_LIST, rop,
1858 newSVOP(OP_CONST, o->op_flags,
1859 SvREFCNT_inc(cSVOPo->op_sv)));
1860 }
1861 }
1862 return rop;
1863}
1864
1865STATIC void
1866S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1867{
09bef843
SB		 1868 SV *stashsv;
1869
1870 /* fake up C<use attributes $pkg,$rv,@attrs> */
1871 ENTER; /* need to protect against side-effects of 'use' */
1872 SAVEINT(PL_expect);
a9164de8 1873 if (stash)
09bef843
SB		 1874 stashsv = newSVpv(HvNAME(stash), 0);
1875 else
1876 stashsv = &PL_sv_no;
e4783991 1877
09bef843 1878#define ATTRSMODULE "attributes"
e4783991
GS		 1879
1880 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1881 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1882 Nullsv,
1883 prepend_elem(OP_LIST,
1884 newSVOP(OP_CONST, 0, stashsv),
1885 prepend_elem(OP_LIST,
1886 newSVOP(OP_CONST, 0,
1887 newRV(target)),
1888 dup_attrlist(attrs))));
09bef843
SB		 1889 LEAVE;
1890}
1891
be3174d2
GS		 1892void
1893Perl_apply_attrs_string(pTHX_ char *stashpv, CV *cv,
1894 char *attrstr, STRLEN len)
1895{
1896 OP *attrs = Nullop;
1897
1898 if (!len) {
1899 len = strlen(attrstr);
1900 }
1901
1902 while (len) {
1903 for (; isSPACE(*attrstr) && len; --len, ++attrstr) ;
1904 if (len) {
1905 char *sstr = attrstr;
1906 for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ;
1907 attrs = append_elem(OP_LIST, attrs,
1908 newSVOP(OP_CONST, 0,
1909 newSVpvn(sstr, attrstr-sstr)));
1910 }
1911 }
1912
1913 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1914 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1915 Nullsv, prepend_elem(OP_LIST,
1916 newSVOP(OP_CONST, 0, newSVpv(stashpv,0)),
1917 prepend_elem(OP_LIST,
1918 newSVOP(OP_CONST, 0,
1919 newRV((SV*)cv)),
1920 attrs)));
1921}
1922
09bef843
SB		 1923STATIC OP *
1924S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1925{
1926 OP *kid;
93a17b20
LW		 1927 I32 type;
1928
3280af22 1929 if (!o || PL_error_count)
11343788 1930 return o;
93a17b20 1931
11343788 1932 type = o->op_type;
93a17b20 1933 if (type == OP_LIST) {
11343788 1934 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1935 my_kid(kid, attrs);
dab48698 1936 } else if (type == OP_UNDEF) {
7766148a 1937 return o;
77ca0c92
LW		 1938 } else if (type == OP_RV2SV || /* "our" declaration */
1939 type == OP_RV2AV ||
1940 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
0256094b
DM		 1941 if (attrs) {
1942 GV *gv = cGVOPx_gv(cUNOPo->op_first);
1943 PL_in_my = FALSE;
1944 PL_in_my_stash = Nullhv;
1945 apply_attrs(GvSTASH(gv),
1946 (type == OP_RV2SV ? GvSV(gv) :
1947 type == OP_RV2AV ? (SV*)GvAV(gv) :
1948 type == OP_RV2HV ? (SV*)GvHV(gv) : (SV*)gv),
1949 attrs);
1950 }
192587c2 1951 o->op_private |= OPpOUR_INTRO;
77ca0c92 1952 return o;
dab48698 1953 } else if (type != OP_PADSV &&
93a17b20
LW		 1954 type != OP_PADAV &&
1955 type != OP_PADHV &&
1956 type != OP_PUSHMARK)
1957 {
eb64745e
GS		 1958 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1959 PL_op_desc[o->op_type],
1960 PL_in_my == KEY_our ? "our" : "my"));
11343788 1961 return o;
93a17b20 1962 }
09bef843
SB		 1963 else if (attrs && type != OP_PUSHMARK) {
1964 HV *stash;
1965 SV *padsv;
1966 SV **namesvp;
1967
eb64745e
GS		 1968 PL_in_my = FALSE;
1969 PL_in_my_stash = Nullhv;
1970
09bef843
SB		 1971 /* check for C<my Dog $spot> when deciding package */
1972 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
a9164de8 1973 if (namesvp && *namesvp && (SvFLAGS(*namesvp) & SVpad_TYPED))
09bef843
SB		 1974 stash = SvSTASH(*namesvp);
1975 else
1976 stash = PL_curstash;
1977 padsv = PAD_SV(o->op_targ);
1978 apply_attrs(stash, padsv, attrs);
1979 }
11343788
MB		 1980 o->op_flags |= OPf_MOD;
1981 o->op_private |= OPpLVAL_INTRO;
1982 return o;
93a17b20
LW		 1983}
1984
1985OP *
09bef843
SB		 1986Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1987{
1988 if (o->op_flags & OPf_PARENS)
1989 list(o);
09bef843
SB		 1990 if (attrs)
1991 SAVEFREEOP(attrs);
eb64745e
GS		 1992 o = my_kid(o, attrs);
1993 PL_in_my = FALSE;
1994 PL_in_my_stash = Nullhv;
1995 return o;
09bef843
SB		 1996}
1997
1998OP *
1999Perl_my(pTHX_ OP *o)
2000{
2001 return my_kid(o, Nullop);
2002}
2003
2004OP *
864dbfa3 2005Perl_sawparens(pTHX_ OP *o)
79072805
LW		 2006{
2007 if (o)
2008 o->op_flags |= OPf_PARENS;
2009 return o;
2010}
2011
2012OP *
864dbfa3 2013Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 2014{
11343788 2015 OP *o;
79072805 2016
e476b1b5 2017 if (ckWARN(WARN_MISC) &&
599cee73
PM		 2018 (left->op_type == OP_RV2AV ||
2019 left->op_type == OP_RV2HV ||
2020 left->op_type == OP_PADAV ||
2021 left->op_type == OP_PADHV)) {
22c35a8c 2022 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 2023 right->op_type == OP_TRANS)
2024 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 2025 const char *sample = ((left->op_type == OP_RV2AV ||
2026 left->op_type == OP_PADAV)
2027 ? "@array" : "%hash");
e476b1b5 2028 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 2029 "Applying %s to %s will act on scalar(%s)",
599cee73 2030 desc, sample, sample);
2ae324a7 2031 }
2032
de4bf5b3
MG		 2033 if (!(right->op_flags & OPf_STACKED) &&
2034 (right->op_type == OP_MATCH ||
79072805 2035 right->op_type == OP_SUBST ||
de4bf5b3 2036 right->op_type == OP_TRANS)) {
79072805 2037 right->op_flags |= OPf_STACKED;
d897a58d
MG		 2038 if (right->op_type != OP_MATCH &&
2039 ! (right->op_type == OP_TRANS &&
2040 right->op_private & OPpTRANS_IDENTICAL))
463ee0b2 2041 left = mod(left, right->op_type);
79072805 2042 if (right->op_type == OP_TRANS)
11343788 2043 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 2044 else
11343788 2045 o = prepend_elem(right->op_type, scalar(left), right);
79072805 2046 if (type == OP_NOT)
11343788
MB		 2047 return newUNOP(OP_NOT, 0, scalar(o));
2048 return o;
79072805
LW		 2049 }
2050 else
2051 return bind_match(type, left,
2052 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
2053}
2054
2055OP *
864dbfa3 2056Perl_invert(pTHX_ OP *o)
79072805 2057{
11343788
MB		 2058 if (!o)
2059 return o;
79072805 2060 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 2061 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 2062}
2063
2064OP *
864dbfa3 2065Perl_scope(pTHX_ OP *o)
79072805
LW		 2066{
2067 if (o) {
3280af22 2068 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 2069 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
2070 o->op_type = OP_LEAVE;
22c35a8c 2071 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2072 }
2073 else {
2074 if (o->op_type == OP_LINESEQ) {
2075 OP *kid;
2076 o->op_type = OP_SCOPE;
22c35a8c 2077 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2078 kid = ((LISTOP*)o)->op_first;
2079 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
93c66552 2080 op_null(kid);
463ee0b2
LW		 2081 }
2082 else
748a9306 2083 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2084 }
79072805
LW		 2085 }
2086 return o;
2087}
2088
b3ac6de7 2089void
864dbfa3 2090Perl_save_hints(pTHX)
b3ac6de7 2091{
3280af22
NIS		 2092 SAVEI32(PL_hints);
2093 SAVESPTR(GvHV(PL_hintgv));
2094 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2095 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2096}
2097
a0d0e21e 2098int
864dbfa3 2099Perl_block_start(pTHX_ int full)
79072805 2100{
3280af22 2101 int retval = PL_savestack_ix;
b3ac6de7 2102
3280af22 2103 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2104 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2105 if (full)
2106 PL_comppad_name_fill = PL_comppad_name_floor;
2107 if (PL_comppad_name_floor < 0)
2108 PL_comppad_name_floor = 0;
3280af22
NIS		 2109 SAVEI32(PL_min_intro_pending);
2110 SAVEI32(PL_max_intro_pending);
2111 PL_min_intro_pending = 0;
2112 SAVEI32(PL_comppad_name_fill);
2113 SAVEI32(PL_padix_floor);
2114 PL_padix_floor = PL_padix;
2115 PL_pad_reset_pending = FALSE;
b3ac6de7 2116 SAVEHINTS();
3280af22 2117 PL_hints &= ~HINT_BLOCK_SCOPE;
1c846c1f 2118 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2119 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2120 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2121 SAVEFREESV(PL_compiling.cop_warnings) ;
2122 }
ac27b0f5
NIS		 2123 SAVESPTR(PL_compiling.cop_io);
2124 if (! specialCopIO(PL_compiling.cop_io)) {
2125 PL_compiling.cop_io = newSVsv(PL_compiling.cop_io) ;
2126 SAVEFREESV(PL_compiling.cop_io) ;
2127 }
a0d0e21e
LW		 2128 return retval;
2129}
2130
2131OP*
864dbfa3 2132Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2133{
3280af22 2134 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2135 OP* retval = scalarseq(seq);
a0d0e21e 2136 LEAVE_SCOPE(floor);
3280af22 2137 PL_pad_reset_pending = FALSE;
e24b16f9 2138 PL_compiling.op_private = PL_hints;
a0d0e21e 2139 if (needblockscope)
3280af22
NIS		 2140 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2141 pad_leavemy(PL_comppad_name_fill);
2142 PL_cop_seqmax++;
a0d0e21e
LW		 2143 return retval;
2144}
2145
76e3520e 2146STATIC OP *
cea2e8a9 2147S_newDEFSVOP(pTHX)
54b9620d
MB		 2148{
2149#ifdef USE_THREADS
2150 OP *o = newOP(OP_THREADSV, 0);
2151 o->op_targ = find_threadsv("_");
2152 return o;
2153#else
3280af22 2154 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2155#endif /* USE_THREADS */
2156}
2157
a0d0e21e 2158void
864dbfa3 2159Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2160{
3280af22 2161 if (PL_in_eval) {
b295d113
TH		 2162 if (PL_eval_root)
2163 return;
faef0170
HS		 2164 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2165 ((PL_in_eval & EVAL_KEEPERR)
2166 ? OPf_SPECIAL : 0), o);
3280af22 2167 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2168 PL_eval_root->op_private |= OPpREFCOUNTED;
2169 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2170 PL_eval_root->op_next = 0;
2171 peep(PL_eval_start);
a0d0e21e
LW		 2172 }
2173 else {
5dc0d613 2174 if (!o)
a0d0e21e 2175 return;
3280af22
NIS		 2176 PL_main_root = scope(sawparens(scalarvoid(o)));
2177 PL_curcop = &PL_compiling;
2178 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2179 PL_main_root->op_private |= OPpREFCOUNTED;
2180 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2181 PL_main_root->op_next = 0;
2182 peep(PL_main_start);
2183 PL_compcv = 0;
3841441e 2184
4fdae800 2185 /* Register with debugger */
84902520 2186 if (PERLDB_INTER) {
864dbfa3 2187 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2188 if (cv) {
2189 dSP;
924508f0 2190 PUSHMARK(SP);
cc49e20b 2191 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2192 PUTBACK;
864dbfa3 2193 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2194 }
2195 }
79072805 2196 }
79072805
LW		 2197}
2198
2199OP *
864dbfa3 2200Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2201{
2202 if (o->op_flags & OPf_PARENS)
2203 list(o);
8990e307 2204 else {
599cee73 2205 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2206 char *s;
fd400ab9 2207 for (s = PL_bufptr; *s && (isALNUM(*s) || UTF8_IS_CONTINUED(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2208 if (*s == ';' || *s == '=')
eb64745e
GS		 2209 Perl_warner(aTHX_ WARN_PARENTHESIS,
2210 "Parentheses missing around \"%s\" list",
2211 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2212 }
2213 }
93a17b20 2214 if (lex)
eb64745e 2215 o = my(o);
93a17b20 2216 else
eb64745e
GS		 2217 o = mod(o, OP_NULL); /* a bit kludgey */
2218 PL_in_my = FALSE;
2219 PL_in_my_stash = Nullhv;
2220 return o;
79072805
LW		 2221}
2222
2223OP *
864dbfa3 2224Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2225{
2226 if (o->op_type == OP_LIST) {
554b3eca
MB		 2227 OP *o2;
2228#ifdef USE_THREADS
2faa37cc 2229 o2 = newOP(OP_THREADSV, 0);
54b9620d 2230 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2231#else
2232 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2233#endif /* USE_THREADS */
2234 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2235 }
2236 return o;
2237}
2238
2239OP *
864dbfa3 2240Perl_fold_constants(pTHX_ register OP *o)
79072805
LW		 2241{
2242 register OP *curop;
2243 I32 type = o->op_type;
748a9306 2244 SV *sv;
79072805 2245
22c35a8c 2246 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2247 scalar(o);
b162f9ea 2248 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2249 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2250
eac055e9
GS		 2251 /* integerize op, unless it happens to be C<-foo>.
2252 * XXX should pp_i_negate() do magic string negation instead? */
2253 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2254 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2255 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2256 {
22c35a8c 2257 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2258 }
85e6fe83 2259
22c35a8c 2260 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2261 goto nope;
2262
de939608 2263 switch (type) {
7a52d87a
GS		 2264 case OP_NEGATE:
2265 /* XXX might want a ck_negate() for this */
2266 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2267 break;
de939608
CS		 2268 case OP_SPRINTF:
2269 case OP_UCFIRST:
2270 case OP_LCFIRST:
2271 case OP_UC:
2272 case OP_LC:
69dcf70c
MB		 2273 case OP_SLT:
2274 case OP_SGT:
2275 case OP_SLE:
2276 case OP_SGE:
2277 case OP_SCMP:
2de3dbcc
JH		 2278 /* XXX what about the numeric ops? */
2279 if (PL_hints & HINT_LOCALE)
de939608
CS		 2280 goto nope;
2281 }
2282
3280af22 2283 if (PL_error_count)
a0d0e21e
LW		 2284 goto nope; /* Don't try to run w/ errors */
2285
79072805 2286 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2287 if ((curop->op_type != OP_CONST ||
2288 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2289 curop->op_type != OP_LIST &&
2290 curop->op_type != OP_SCALAR &&
2291 curop->op_type != OP_NULL &&
2292 curop->op_type != OP_PUSHMARK)
2293 {
79072805
LW		 2294 goto nope;
2295 }
2296 }
2297
2298 curop = LINKLIST(o);
2299 o->op_next = 0;
533c011a 2300 PL_op = curop;
cea2e8a9 2301 CALLRUNOPS(aTHX);
3280af22 2302 sv = *(PL_stack_sp--);
748a9306 2303 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2304 pad_swipe(o->op_targ);
748a9306
LW		 2305 else if (SvTEMP(sv)) { /* grab mortal temp? */
2306 (void)SvREFCNT_inc(sv);
2307 SvTEMP_off(sv);
85e6fe83 2308 }
79072805
LW		 2309 op_free(o);
2310 if (type == OP_RV2GV)
b1cb66bf 2311 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2312 else {
ee580363
GS		 2313 /* try to smush double to int, but don't smush -2.0 to -2 */
2314 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2315 type != OP_NEGATE)
2316 {
28e5dec8
JH		 2317#ifdef PERL_PRESERVE_IVUV
2318 /* Only bother to attempt to fold to IV if
2319 most operators will benefit */
2320 SvIV_please(sv);
2321#endif
748a9306
LW		 2322 }
2323 return newSVOP(OP_CONST, 0, sv);
2324 }
aeea060c 2325
79072805 2326 nope:
22c35a8c 2327 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2328 return o;
79072805 2329
3280af22 2330 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2331 if (type == OP_MODULO
2332 || type == OP_DIVIDE
2333 || !(o->op_flags & OPf_KIDS))
2334 {
85e6fe83 2335 return o;
4bb9f687 2336 }
85e6fe83
LW		 2337
2338 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2339 if (curop->op_type == OP_CONST) {
b1cb66bf 2340 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2341 continue;
2342 return o;
2343 }
22c35a8c 2344 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2345 continue;
2346 return o;
2347 }
22c35a8c 2348 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2349 }
2350
79072805
LW		 2351 return o;
2352}
2353
2354OP *
864dbfa3 2355Perl_gen_constant_list(pTHX_ register OP *o)
79072805
LW		 2356{
2357 register OP *curop;
3280af22 2358 I32 oldtmps_floor = PL_tmps_floor;
79072805 2359
a0d0e21e 2360 list(o);
3280af22 2361 if (PL_error_count)
a0d0e21e
LW		 2362 return o; /* Don't attempt to run with errors */
2363
533c011a 2364 PL_op = curop = LINKLIST(o);
a0d0e21e 2365 o->op_next = 0;
7d4045d4 2366 peep(curop);
cea2e8a9
GS		 2367 pp_pushmark();
2368 CALLRUNOPS(aTHX);
533c011a 2369 PL_op = curop;
cea2e8a9 2370 pp_anonlist();
3280af22 2371 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2372
2373 o->op_type = OP_RV2AV;
22c35a8c 2374 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2375 curop = ((UNOP*)o)->op_first;
3280af22 2376 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2377 op_free(curop);
79072805
LW		 2378 linklist(o);
2379 return list(o);
2380}
2381
2382OP *
864dbfa3 2383Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805 2384{
11343788
MB		 2385 if (!o || o->op_type != OP_LIST)
2386 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2387 else
5dc0d613 2388 o->op_flags &= ~OPf_WANT;
79072805 2389
22c35a8c 2390 if (!(PL_opargs[type] & OA_MARK))
93c66552 2391 op_null(cLISTOPo->op_first);
8990e307 2392
11343788 2393 o->op_type = type;
22c35a8c 2394 o->op_ppaddr = PL_ppaddr[type];
11343788 2395 o->op_flags |= flags;
79072805 2396
11343788
MB		 2397 o = CHECKOP(type, o);
2398 if (o->op_type != type)
2399 return o;
79072805 2400
11343788 2401 return fold_constants(o);
79072805
LW		 2402}
2403
2404/* List constructors */
2405
2406OP *
864dbfa3 2407Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2408{
2409 if (!first)
2410 return last;
8990e307
LW		 2411
2412 if (!last)
79072805 2413 return first;
8990e307 2414
155aba94
GS		 2415 if (first->op_type != type
2416 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2417 {
2418 return newLISTOP(type, 0, first, last);
2419 }
79072805 2420
a0d0e21e
LW		 2421 if (first->op_flags & OPf_KIDS)
2422 ((LISTOP*)first)->op_last->op_sibling = last;
2423 else {
2424 first->op_flags |= OPf_KIDS;
2425 ((LISTOP*)first)->op_first = last;
2426 }
2427 ((LISTOP*)first)->op_last = last;
a0d0e21e 2428 return first;
79072805
LW		 2429}
2430
2431OP *
864dbfa3 2432Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2433{
2434 if (!first)
2435 return (OP*)last;
8990e307
LW		 2436
2437 if (!last)
79072805 2438 return (OP*)first;
8990e307
LW		 2439
2440 if (first->op_type != type)
79072805 2441 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2442
2443 if (last->op_type != type)
79072805
LW		 2444 return append_elem(type, (OP*)first, (OP*)last);
2445
2446 first->op_last->op_sibling = last->op_first;
2447 first->op_last = last->op_last;
117dada2 2448 first->op_flags |= (last->op_flags & OPf_KIDS);
1c846c1f 2449
b7dc083c
NIS		 2450#ifdef PL_OP_SLAB_ALLOC
2451#else
1c846c1f 2452 Safefree(last);
b7dc083c 2453#endif
79072805
LW		 2454 return (OP*)first;
2455}
2456
2457OP *
864dbfa3 2458Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2459{
2460 if (!first)
2461 return last;
8990e307
LW		 2462
2463 if (!last)
79072805 2464 return first;
8990e307
LW		 2465
2466 if (last->op_type == type) {
2467 if (type == OP_LIST) { /* already a PUSHMARK there */
2468 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2469 ((LISTOP*)last)->op_first->op_sibling = first;
36a5d4ba
DC		 2470 if (!(first->op_flags & OPf_PARENS))
2471 last->op_flags &= ~OPf_PARENS;
8990e307
LW		 2472 }
2473 else {
2474 if (!(last->op_flags & OPf_KIDS)) {
2475 ((LISTOP*)last)->op_last = first;
2476 last->op_flags |= OPf_KIDS;
2477 }
2478 first->op_sibling = ((LISTOP*)last)->op_first;
2479 ((LISTOP*)last)->op_first = first;
79072805 2480 }
117dada2 2481 last->op_flags |= OPf_KIDS;
79072805
LW		 2482 return last;
2483 }
2484
2485 return newLISTOP(type, 0, first, last);
2486}
2487
2488/* Constructors */
2489
2490OP *
864dbfa3 2491Perl_newNULLLIST(pTHX)
79072805 2492{
8990e307
LW		 2493 return newOP(OP_STUB, 0);
2494}
2495
2496OP *
864dbfa3 2497Perl_force_list(pTHX_ OP *o)
8990e307 2498{
11343788
MB		 2499 if (!o || o->op_type != OP_LIST)
2500 o = newLISTOP(OP_LIST, 0, o, Nullop);
93c66552 2501 op_null(o);
11343788 2502 return o;
79072805
LW		 2503}
2504
2505OP *
864dbfa3 2506Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2507{
2508 LISTOP *listop;
2509
b7dc083c 2510 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2511
2512 listop->op_type = type;
22c35a8c 2513 listop->op_ppaddr = PL_ppaddr[type];
117dada2
SM		 2514 if (first || last)
2515 flags |= OPf_KIDS;
79072805 2516 listop->op_flags = flags;
79072805
LW		 2517
2518 if (!last && first)
2519 last = first;
2520 else if (!first && last)
2521 first = last;
8990e307
LW		 2522 else if (first)
2523 first->op_sibling = last;
79072805
LW		 2524 listop->op_first = first;
2525 listop->op_last = last;
8990e307
LW		 2526 if (type == OP_LIST) {
2527 OP* pushop;
2528 pushop = newOP(OP_PUSHMARK, 0);
2529 pushop->op_sibling = first;
2530 listop->op_first = pushop;
2531 listop->op_flags |= OPf_KIDS;
2532 if (!last)
2533 listop->op_last = pushop;
2534 }
79072805
LW		 2535
2536 return (OP*)listop;
2537}
2538
2539OP *
864dbfa3 2540Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2541{
11343788 2542 OP *o;
b7dc083c 2543 NewOp(1101, o, 1, OP);
11343788 2544 o->op_type = type;
22c35a8c 2545 o->op_ppaddr = PL_ppaddr[type];
11343788 2546 o->op_flags = flags;
79072805 2547
11343788
MB		 2548 o->op_next = o;
2549 o->op_private = 0 + (flags >> 8);
22c35a8c 2550 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2551 scalar(o);
22c35a8c 2552 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2553 o->op_targ = pad_alloc(type, SVs_PADTMP);
2554 return CHECKOP(type, o);
79072805
LW		 2555}
2556
2557OP *
864dbfa3 2558Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2559{
2560 UNOP *unop;
2561
93a17b20 2562 if (!first)
aeea060c 2563 first = newOP(OP_STUB, 0);
22c35a8c 2564 if (PL_opargs[type] & OA_MARK)
8990e307 2565 first = force_list(first);
93a17b20 2566
b7dc083c 2567 NewOp(1101, unop, 1, UNOP);
79072805 2568 unop->op_type = type;
22c35a8c 2569 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2570 unop->op_first = first;
2571 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2572 unop->op_private = 1 | (flags >> 8);
e50aee73 2573 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2574 if (unop->op_next)
2575 return (OP*)unop;
2576
a0d0e21e 2577 return fold_constants((OP *) unop);
79072805
LW		 2578}
2579
2580OP *
864dbfa3 2581Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2582{
2583 BINOP *binop;
b7dc083c 2584 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2585
2586 if (!first)
2587 first = newOP(OP_NULL, 0);
2588
2589 binop->op_type = type;
22c35a8c 2590 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2591 binop->op_first = first;
2592 binop->op_flags = flags | OPf_KIDS;
2593 if (!last) {
2594 last = first;
c07a80fd 2595 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2596 }
2597 else {
c07a80fd 2598 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2599 first->op_sibling = last;
2600 }
2601
e50aee73 2602 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2603 if (binop->op_next || binop->op_type != type)
79072805
LW		 2604 return (OP*)binop;
2605
7284ab6f 2606 binop->op_last = binop->op_first->op_sibling;
79072805 2607
a0d0e21e 2608 return fold_constants((OP *)binop);
79072805
LW		 2609}
2610
a0ed51b3 2611static int
2b9d42f0
NIS		 2612uvcompare(const void *a, const void *b)
2613{
2614 if (*((UV *)a) < (*(UV *)b))
2615 return -1;
2616 if (*((UV *)a) > (*(UV *)b))
2617 return 1;
2618 if (*((UV *)a+1) < (*(UV *)b+1))
2619 return -1;
2620 if (*((UV *)a+1) > (*(UV *)b+1))
2621 return 1;
a0ed51b3
LW		 2622 return 0;
2623}
2624
79072805 2625OP *
864dbfa3 2626Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2627{
79072805
LW		 2628 SV *tstr = ((SVOP*)expr)->op_sv;
2629 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2630 STRLEN tlen;
2631 STRLEN rlen;
9b877dbb
IH		 2632 U8 *t = (U8*)SvPV(tstr, tlen);
2633 U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2634 register I32 i;
2635 register I32 j;
a0ed51b3 2636 I32 del;
79072805 2637 I32 complement;
5d06d08e 2638 I32 squash;
9b877dbb 2639 I32 grows = 0;
79072805
LW		 2640 register short *tbl;
2641
800b4dc4 2642 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2643 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2644 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2645 squash = o->op_private & OPpTRANS_SQUASH;
1c846c1f 2646
036b4402
GS		 2647 if (SvUTF8(tstr))
2648 o->op_private |= OPpTRANS_FROM_UTF;
1c846c1f
NIS		 2649
2650 if (SvUTF8(rstr))
036b4402 2651 o->op_private |= OPpTRANS_TO_UTF;
79072805 2652
a0ed51b3 2653 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2654 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2655 SV* transv = 0;
2656 U8* tend = t + tlen;
2657 U8* rend = r + rlen;
ba210ebe 2658 STRLEN ulen;
a0ed51b3
LW		 2659 U32 tfirst = 1;
2660 U32 tlast = 0;
2661 I32 tdiff;
2662 U32 rfirst = 1;
2663 U32 rlast = 0;
2664 I32 rdiff;
2665 I32 diff;
2666 I32 none = 0;
2667 U32 max = 0;
2668 I32 bits;
a0ed51b3 2669 I32 havefinal = 0;
9c5ffd7c 2670 U32 final = 0;
a0ed51b3
LW		 2671 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2672 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
bf4a1e57
JH		 2673 U8* tsave = NULL;
2674 U8* rsave = NULL;
2675
2676 if (!from_utf) {
2677 STRLEN len = tlen;
2678 tsave = t = bytes_to_utf8(t, &len);
2679 tend = t + len;
2680 }
2681 if (!to_utf && rlen) {
2682 STRLEN len = rlen;
2683 rsave = r = bytes_to_utf8(r, &len);
2684 rend = r + len;
2685 }
a0ed51b3 2686
2b9d42f0
NIS		 2687/* There are several snags with this code on EBCDIC:
2688 1. 0xFF is a legal UTF-EBCDIC byte (there are no illegal bytes).
2689 2. scan_const() in toke.c has encoded chars in native encoding which makes
2690 ranges at least in EBCDIC 0..255 range the bottom odd.
2691*/
2692
a0ed51b3 2693 if (complement) {
ad391ad9 2694 U8 tmpbuf[UTF8_MAXLEN+1];
2b9d42f0 2695 UV *cp;
a0ed51b3 2696 UV nextmin = 0;
2b9d42f0 2697 New(1109, cp, 2*tlen, UV);
a0ed51b3 2698 i = 0;
79cb57f6 2699 transv = newSVpvn("",0);
a0ed51b3 2700 while (t < tend) {
2b9d42f0
NIS		 2701 cp[2*i] = utf8n_to_uvuni(t, tend-t, &ulen, 0);
2702 t += ulen;
2703 if (t < tend && NATIVE_TO_UTF(*t) == 0xff) {
a0ed51b3 2704 t++;
2b9d42f0
NIS		 2705 cp[2*i+1] = utf8n_to_uvuni(t, tend-t, &ulen, 0);
2706 t += ulen;
a0ed51b3 2707 }
2b9d42f0
NIS		 2708 else {
2709 cp[2*i+1] = cp[2*i];
2710 }
2711 i++;
a0ed51b3 2712 }
2b9d42f0 2713 qsort(cp, i, 2*sizeof(UV), uvcompare);
a0ed51b3 2714 for (j = 0; j < i; j++) {
2b9d42f0 2715 UV val = cp[2*j];
a0ed51b3
LW		 2716 diff = val - nextmin;
2717 if (diff > 0) {
9041c2e3 2718 t = uvuni_to_utf8(tmpbuf,nextmin);
dfe13c55 2719 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3 2720 if (diff > 1) {
2b9d42f0 2721 U8 range_mark = UTF_TO_NATIVE(0xff);
9041c2e3 2722 t = uvuni_to_utf8(tmpbuf, val - 1);
2b9d42f0 2723 sv_catpvn(transv, (char *)&range_mark, 1);
dfe13c55 2724 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2725 }
2726 }
2b9d42f0 2727 val = cp[2*j+1];
a0ed51b3
LW		 2728 if (val >= nextmin)
2729 nextmin = val + 1;
2730 }
9041c2e3 2731 t = uvuni_to_utf8(tmpbuf,nextmin);
dfe13c55 2732 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2b9d42f0
NIS		 2733 {
2734 U8 range_mark = UTF_TO_NATIVE(0xff);
2735 sv_catpvn(transv, (char *)&range_mark, 1);
2736 }
9041c2e3 2737 t = uvuni_to_utf8(tmpbuf, 0x7fffffff);
dfe13c55
GS		 2738 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2739 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2740 tlen = SvCUR(transv);
2741 tend = t + tlen;
455d824a 2742 Safefree(cp);
a0ed51b3
LW		 2743 }
2744 else if (!rlen && !del) {
2745 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2746 }
2747 if (!squash) {
05d340b8 2748 if ((!rlen && !del) || t == r ||
12ae5dfc 2749 (tlen == rlen && memEQ((char *)t, (char *)r, tlen)))
01ec43d0 2750 {
4757a243 2751 o->op_private |= OPpTRANS_IDENTICAL;
01ec43d0 2752 }
a0ed51b3
LW		 2753 }
2754
2755 while (t < tend || tfirst <= tlast) {
2756 /* see if we need more "t" chars */
2757 if (tfirst > tlast) {
9041c2e3 2758 tfirst = (I32)utf8n_to_uvuni(t, tend - t, &ulen, 0);
a0ed51b3 2759 t += ulen;
2b9d42f0 2760 if (t < tend && NATIVE_TO_UTF(*t) == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2761 t++;
9041c2e3 2762 tlast = (I32)utf8n_to_uvuni(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2763 t += ulen;
2764 }
2765 else
2766 tlast = tfirst;
2767 }
2768
2769 /* now see if we need more "r" chars */
2770 if (rfirst > rlast) {
2771 if (r < rend) {
9041c2e3 2772 rfirst = (I32)utf8n_to_uvuni(r, rend - r, &ulen, 0);
a0ed51b3 2773 r += ulen;
2b9d42f0 2774 if (r < rend && NATIVE_TO_UTF(*r) == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2775 r++;
9041c2e3 2776 rlast = (I32)utf8n_to_uvuni(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2777 r += ulen;
2778 }
2779 else
2780 rlast = rfirst;
2781 }
2782 else {
2783 if (!havefinal++)
2784 final = rlast;
2785 rfirst = rlast = 0xffffffff;
2786 }
2787 }
2788
2789 /* now see which range will peter our first, if either. */
2790 tdiff = tlast - tfirst;
2791 rdiff = rlast - rfirst;
2792
2793 if (tdiff <= rdiff)
2794 diff = tdiff;
2795 else
2796 diff = rdiff;
2797
2798 if (rfirst == 0xffffffff) {
2799 diff = tdiff; /* oops, pretend rdiff is infinite */
2800 if (diff > 0)
894356b3
GS		 2801 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2802 (long)tfirst, (long)tlast);
a0ed51b3 2803 else
894356b3 2804 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2805 }
2806 else {
2807 if (diff > 0)
894356b3
GS		 2808 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2809 (long)tfirst, (long)(tfirst + diff),
2810 (long)rfirst);
a0ed51b3 2811 else
894356b3
GS		 2812 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2813 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2814
2815 if (rfirst + diff > max)
2816 max = rfirst + diff;
9b877dbb 2817 if (!grows)
45005bfb
JH		 2818 grows = (tfirst < rfirst &&
2819 UNISKIP(tfirst) < UNISKIP(rfirst + diff));
2820 rfirst += diff + 1;
a0ed51b3
LW		 2821 }
2822 tfirst += diff + 1;
2823 }
2824
2825 none = ++max;
2826 if (del)
2827 del = ++max;
2828
2829 if (max > 0xffff)
2830 bits = 32;
2831 else if (max > 0xff)
2832 bits = 16;
2833 else
2834 bits = 8;
2835
455d824a 2836 Safefree(cPVOPo->op_pv);
a0ed51b3
LW		 2837 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2838 SvREFCNT_dec(listsv);
2839 if (transv)
2840 SvREFCNT_dec(transv);
2841
45005bfb 2842 if (!del && havefinal && rlen)
b448e4fe
JH		 2843 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2844 newSVuv((UV)final), 0);
a0ed51b3 2845
9b877dbb 2846 if (grows)
a0ed51b3
LW		 2847 o->op_private |= OPpTRANS_GROWS;
2848
9b877dbb
IH		 2849 if (tsave)
2850 Safefree(tsave);
2851 if (rsave)
2852 Safefree(rsave);
2853
a0ed51b3
LW		 2854 op_free(expr);
2855 op_free(repl);
2856 return o;
2857 }
2858
2859 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2860 if (complement) {
2861 Zero(tbl, 256, short);
2862 for (i = 0; i < tlen; i++)
ec49126f 2863 tbl[t[i]] = -1;
79072805
LW		 2864 for (i = 0, j = 0; i < 256; i++) {
2865 if (!tbl[i]) {
2866 if (j >= rlen) {
a0ed51b3 2867 if (del)
79072805
LW		 2868 tbl[i] = -2;
2869 else if (rlen)
ec49126f 2870 tbl[i] = r[j-1];
79072805
LW		 2871 else
2872 tbl[i] = i;
2873 }
9b877dbb
IH		 2874 else {
2875 if (i < 128 && r[j] >= 128)
2876 grows = 1;
ec49126f 2877 tbl[i] = r[j++];
9b877dbb 2878 }
79072805
LW		 2879 }
2880 }
05d340b8
JH		 2881 if (!del) {
2882 if (!rlen) {
2883 j = rlen;
2884 if (!squash)
2885 o->op_private |= OPpTRANS_IDENTICAL;
2886 }
2887 else if (j >= rlen)
2888 j = rlen - 1;
2889 else
2890 cPVOPo->op_pv = (char*)Renew(tbl, 0x101+rlen-j, short);
8973db79
JH		 2891 tbl[0x100] = rlen - j;
2892 for (i=0; i < rlen - j; i++)
2893 tbl[0x101+i] = r[j+i];
2894 }
79072805
LW		 2895 }
2896 else {
a0ed51b3 2897 if (!rlen && !del) {
79072805 2898 r = t; rlen = tlen;
5d06d08e 2899 if (!squash)
4757a243 2900 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2901 }
2902 for (i = 0; i < 256; i++)
2903 tbl[i] = -1;
2904 for (i = 0, j = 0; i < tlen; i++,j++) {
2905 if (j >= rlen) {
a0ed51b3 2906 if (del) {
ec49126f 2907 if (tbl[t[i]] == -1)
2908 tbl[t[i]] = -2;
79072805
LW		 2909 continue;
2910 }
2911 --j;
2912 }
9b877dbb
IH		 2913 if (tbl[t[i]] == -1) {
2914 if (t[i] < 128 && r[j] >= 128)
2915 grows = 1;
ec49126f 2916 tbl[t[i]] = r[j];
9b877dbb 2917 }
79072805
LW		 2918 }
2919 }
9b877dbb
IH		 2920 if (grows)
2921 o->op_private |= OPpTRANS_GROWS;
79072805
LW		 2922 op_free(expr);
2923 op_free(repl);
2924
11343788 2925 return o;
79072805
LW		 2926}
2927
2928OP *
864dbfa3 2929Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805
LW		 2930{
2931 PMOP *pmop;
2932
b7dc083c 2933 NewOp(1101, pmop, 1, PMOP);
79072805 2934 pmop->op_type = type;
22c35a8c 2935 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2936 pmop->op_flags = flags;
c07a80fd 2937 pmop->op_private = 0 | (flags >> 8);
79072805 2938
3280af22 2939 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2940 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2941 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2942 pmop->op_pmpermflags |= PMf_LOCALE;
2943 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2944
79072805 2945 /* link into pm list */
3280af22
NIS		 2946 if (type != OP_TRANS && PL_curstash) {
2947 pmop->op_pmnext = HvPMROOT(PL_curstash);
2948 HvPMROOT(PL_curstash) = pmop;
cb55de95 2949 PmopSTASH_set(pmop,PL_curstash);
79072805
LW		 2950 }
2951
2952 return (OP*)pmop;
2953}
2954
2955OP *
864dbfa3 2956Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805
LW		 2957{
2958 PMOP *pm;
2959 LOGOP *rcop;
ce862d02 2960 I32 repl_has_vars = 0;
79072805 2961
11343788
MB		 2962 if (o->op_type == OP_TRANS)
2963 return pmtrans(o, expr, repl);
79072805 2964
3280af22 2965 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2966 pm = (PMOP*)o;
79072805
LW		 2967
2968 if (expr->op_type == OP_CONST) {
463ee0b2 2969 STRLEN plen;
79072805 2970 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2971 char *p = SvPV(pat, plen);
11343788 2972 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2973 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2974 p = SvPV(pat, plen);
79072805
LW		 2975 pm->op_pmflags |= PMf_SKIPWHITE;
2976 }
1fd7b382 2977 if ((PL_hints & HINT_UTF8) || DO_UTF8(pat))
7e2040f0 2978 pm->op_pmdynflags |= PMdf_UTF8;
aaa362c4
RS		 2979 PM_SETRE(pm, CALLREGCOMP(aTHX_ p, p + plen, pm));
2980 if (strEQ("\\s+", PM_GETRE(pm)->precomp))
85e6fe83 2981 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2982 op_free(expr);
2983 }
2984 else {
393fec97
GS		 2985 if (PL_hints & HINT_UTF8)
2986 pm->op_pmdynflags |= PMdf_UTF8;
3280af22 2987 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
1c846c1f 2988 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2989 ? OP_REGCRESET
2990 : OP_REGCMAYBE),0,expr);
463ee0b2 2991
b7dc083c 2992 NewOp(1101, rcop, 1, LOGOP);
79072805 2993 rcop->op_type = OP_REGCOMP;
22c35a8c 2994 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2995 rcop->op_first = scalar(expr);
1c846c1f 2996 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2997 ? (OPf_SPECIAL | OPf_KIDS)
2998 : OPf_KIDS);
79072805 2999 rcop->op_private = 1;
11343788 3000 rcop->op_other = o;
79072805
LW		 3001
3002 /* establish postfix order */
3280af22 3003 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 3004 LINKLIST(expr);
3005 rcop->op_next = expr;
3006 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
3007 }
3008 else {
3009 rcop->op_next = LINKLIST(expr);
3010 expr->op_next = (OP*)rcop;
3011 }
79072805 3012
11343788 3013 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 3014 }
3015
3016 if (repl) {
748a9306 3017 OP *curop;
0244c3a4 3018 if (pm->op_pmflags & PMf_EVAL) {
748a9306 3019 curop = 0;
57843af0
GS		 3020 if (CopLINE(PL_curcop) < PL_multi_end)
3021 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 3022 }
554b3eca 3023#ifdef USE_THREADS
2faa37cc 3024 else if (repl->op_type == OP_THREADSV
554b3eca 3025 && strchr("&`'123456789+",
533c011a 3026 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 3027 {
3028 curop = 0;
3029 }
3030#endif /* USE_THREADS */
748a9306
LW		 3031 else if (repl->op_type == OP_CONST)
3032 curop = repl;
79072805 3033 else {
79072805
LW		 3034 OP *lastop = 0;
3035 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 3036 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 3037#ifdef USE_THREADS
ce862d02
IZ		 3038 if (curop->op_type == OP_THREADSV) {
3039 repl_has_vars = 1;
be949f6f 3040 if (strchr("&`'123456789+", curop->op_private))
ce862d02 3041 break;
554b3eca
MB		 3042 }
3043#else
79072805 3044 if (curop->op_type == OP_GV) {
638eceb6 3045 GV *gv = cGVOPx_gv(curop);
ce862d02 3046 repl_has_vars = 1;
93a17b20 3047 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 3048 break;
3049 }
554b3eca 3050#endif /* USE_THREADS */
79072805
LW		 3051 else if (curop->op_type == OP_RV2CV)
3052 break;
3053 else if (curop->op_type == OP_RV2SV ||
3054 curop->op_type == OP_RV2AV ||
3055 curop->op_type == OP_RV2HV ||
3056 curop->op_type == OP_RV2GV) {
3057 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
3058 break;
3059 }
748a9306
LW		 3060 else if (curop->op_type == OP_PADSV ||
3061 curop->op_type == OP_PADAV ||
3062 curop->op_type == OP_PADHV ||
554b3eca 3063 curop->op_type == OP_PADANY) {
ce862d02 3064 repl_has_vars = 1;
748a9306 3065 }
1167e5da
SM		 3066 else if (curop->op_type == OP_PUSHRE)
3067 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 3068 else
3069 break;
3070 }
3071 lastop = curop;
3072 }
748a9306 3073 }
ce862d02 3074 if (curop == repl
1c846c1f 3075 && !(repl_has_vars
aaa362c4
RS		 3076 && (!PM_GETRE(pm)
3077 || PM_GETRE(pm)->reganch & ROPT_EVAL_SEEN))) {
748a9306 3078 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 3079 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 3080 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 3081 }
3082 else {
aaa362c4 3083 if (curop == repl && !PM_GETRE(pm)) { /* Has variables. */
ce862d02
IZ		 3084 pm->op_pmflags |= PMf_MAYBE_CONST;
3085 pm->op_pmpermflags |= PMf_MAYBE_CONST;
3086 }
b7dc083c 3087 NewOp(1101, rcop, 1, LOGOP);
748a9306 3088 rcop->op_type = OP_SUBSTCONT;
22c35a8c 3089 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 3090 rcop->op_first = scalar(repl);
3091 rcop->op_flags |= OPf_KIDS;
3092 rcop->op_private = 1;
11343788 3093 rcop->op_other = o;
748a9306
LW		 3094
3095 /* establish postfix order */
3096 rcop->op_next = LINKLIST(repl);
3097 repl->op_next = (OP*)rcop;
3098
3099 pm->op_pmreplroot = scalar((OP*)rcop);
3100 pm->op_pmreplstart = LINKLIST(rcop);
3101 rcop->op_next = 0;
79072805
LW		 3102 }
3103 }
3104
3105 return (OP*)pm;
3106}
3107
3108OP *
864dbfa3 3109Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3110{
3111 SVOP *svop;
b7dc083c 3112 NewOp(1101, svop, 1, SVOP);
79072805 3113 svop->op_type = type;
22c35a8c 3114 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3115 svop->op_sv = sv;
3116 svop->op_next = (OP*)svop;
3117 svop->op_flags = flags;
22c35a8c 3118 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3119 scalar((OP*)svop);
22c35a8c 3120 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3121 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3122 return CHECKOP(type, svop);
79072805
LW		 3123}
3124
3125OP *
350de78d
GS		 3126Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3127{
3128 PADOP *padop;
3129 NewOp(1101, padop, 1, PADOP);
3130 padop->op_type = type;
3131 padop->op_ppaddr = PL_ppaddr[type];
3132 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3133 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3134 PL_curpad[padop->op_padix] = sv;
7766f137 3135 SvPADTMP_on(sv);
350de78d
GS		 3136 padop->op_next = (OP*)padop;
3137 padop->op_flags = flags;
3138 if (PL_opargs[type] & OA_RETSCALAR)
3139 scalar((OP*)padop);
3140 if (PL_opargs[type] & OA_TARGET)
3141 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3142 return CHECKOP(type, padop);
3143}
3144
3145OP *
864dbfa3 3146Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3147{
350de78d 3148#ifdef USE_ITHREADS
743e66e6 3149 GvIN_PAD_on(gv);
350de78d
GS		 3150 return newPADOP(type, flags, SvREFCNT_inc(gv));
3151#else
7934575e 3152 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3153#endif
79072805
LW		 3154}
3155
3156OP *
864dbfa3 3157Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3158{
3159 PVOP *pvop;
b7dc083c 3160 NewOp(1101, pvop, 1, PVOP);
79072805 3161 pvop->op_type = type;
22c35a8c 3162 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3163 pvop->op_pv = pv;
3164 pvop->op_next = (OP*)pvop;
3165 pvop->op_flags = flags;
22c35a8c 3166 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3167 scalar((OP*)pvop);
22c35a8c 3168 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3169 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3170 return CHECKOP(type, pvop);
79072805
LW		 3171}
3172
79072805 3173void
864dbfa3 3174Perl_package(pTHX_ OP *o)
79072805 3175{
93a17b20 3176 SV *sv;
79072805 3177
3280af22
NIS		 3178 save_hptr(&PL_curstash);
3179 save_item(PL_curstname);
11343788 3180 if (o) {
463ee0b2
LW		 3181 STRLEN len;
3182 char *name;
11343788 3183 sv = cSVOPo->op_sv;
463ee0b2 3184 name = SvPV(sv, len);
3280af22
NIS		 3185 PL_curstash = gv_stashpvn(name,len,TRUE);
3186 sv_setpvn(PL_curstname, name, len);
11343788 3187 op_free(o);
93a17b20
LW		 3188 }
3189 else {
3280af22
NIS		 3190 sv_setpv(PL_curstname,"<none>");
3191 PL_curstash = Nullhv;
93a17b20 3192 }
7ad382f4 3193 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3194 PL_copline = NOLINE;
3195 PL_expect = XSTATE;
79072805
LW		 3196}
3197
85e6fe83 3198void
864dbfa3 3199Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3200{
a0d0e21e 3201 OP *pack;
a0d0e21e 3202 OP *imop;
b1cb66bf 3203 OP *veop;
85e6fe83 3204
a0d0e21e 3205 if (id->op_type != OP_CONST)
cea2e8a9 3206 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3207
b1cb66bf 3208 veop = Nullop;
3209
0f79a09d 3210 if (version != Nullop) {
b1cb66bf 3211 SV *vesv = ((SVOP*)version)->op_sv;
3212
44dcb63b 3213 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3214 arg = version;
3215 }
3216 else {
3217 OP *pack;
0f79a09d 3218 SV *meth;
b1cb66bf 3219
44dcb63b 3220 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3221 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3222
3223 /* Make copy of id so we don't free it twice */
3224 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3225
3226 /* Fake up a method call to VERSION */
0f79a09d
GS		 3227 meth = newSVpvn("VERSION",7);
3228 sv_upgrade(meth, SVt_PVIV);
155aba94 3229 (void)SvIOK_on(meth);
0f79a09d 3230 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3231 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3232 append_elem(OP_LIST,
0f79a09d
GS		 3233 prepend_elem(OP_LIST, pack, list(version)),
3234 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3235 }
3236 }
aeea060c 3237
a0d0e21e 3238 /* Fake up an import/unimport */
4633a7c4
LW		 3239 if (arg && arg->op_type == OP_STUB)
3240 imop = arg; /* no import on explicit () */
44dcb63b 3241 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3242 imop = Nullop; /* use 5.0; */
3243 }
4633a7c4 3244 else {
0f79a09d
GS		 3245 SV *meth;
3246
4633a7c4
LW		 3247 /* Make copy of id so we don't free it twice */
3248 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3249
3250 /* Fake up a method call to import/unimport */
3251 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3252 sv_upgrade(meth, SVt_PVIV);
155aba94 3253 (void)SvIOK_on(meth);
0f79a09d 3254 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3255 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3256 append_elem(OP_LIST,
3257 prepend_elem(OP_LIST, pack, list(arg)),
3258 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3259 }
3260
a0d0e21e 3261 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3262 newATTRSUB(floor,
79cb57f6 3263 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3264 Nullop,
09bef843 3265 Nullop,
a0d0e21e 3266 append_elem(OP_LINESEQ,
b1cb66bf 3267 append_elem(OP_LINESEQ,
ec4ab249 3268 newSTATEOP(0, Nullch, newUNOP(OP_REQUIRE, 0, id)),
b1cb66bf 3269 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3270 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3271
c305c6a0 3272 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3273 PL_copline = NOLINE;
3274 PL_expect = XSTATE;
85e6fe83
LW		 3275}
3276
7d3fb230
BS		 3277/*
3278=for apidoc load_module
3279
3280Loads the module whose name is pointed to by the string part of name.
3281Note that the actual module name, not its filename, should be given.
3282Eg, "Foo::Bar" instead of "Foo/Bar.pm". flags can be any of
3283PERL_LOADMOD_DENY, PERL_LOADMOD_NOIMPORT, or PERL_LOADMOD_IMPORT_OPS
3284(or 0 for no flags). ver, if specified, provides version semantics
3285similar to C<use Foo::Bar VERSION>. The optional trailing SV*
3286arguments can be used to specify arguments to the module's import()
3287method, similar to C<use Foo::Bar VERSION LIST>.
3288
3289=cut */
3290
e4783991
GS		 3291void
3292Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3293{
3294 va_list args;
3295 va_start(args, ver);
3296 vload_module(flags, name, ver, &args);
3297 va_end(args);
3298}
3299
3300#ifdef PERL_IMPLICIT_CONTEXT
3301void
3302Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3303{
3304 dTHX;
3305 va_list args;
3306 va_start(args, ver);
3307 vload_module(flags, name, ver, &args);
3308 va_end(args);
3309}
3310#endif
3311
3312void
3313Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3314{
3315 OP *modname, *veop, *imop;
3316
3317 modname = newSVOP(OP_CONST, 0, name);
3318 modname->op_private |= OPpCONST_BARE;
3319 if (ver) {
3320 veop = newSVOP(OP_CONST, 0, ver);
3321 }
3322 else
3323 veop = Nullop;
3324 if (flags & PERL_LOADMOD_NOIMPORT) {
3325 imop = sawparens(newNULLLIST());
3326 }
3327 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3328 imop = va_arg(*args, OP*);
3329 }
3330 else {
3331 SV *sv;
3332 imop = Nullop;
3333 sv = va_arg(*args, SV*);
3334 while (sv) {
3335 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3336 sv = va_arg(*args, SV*);
3337 }
3338 }
81885997
GS		 3339 {
3340 line_t ocopline = PL_copline;
3341 int oexpect = PL_expect;
3342
3343 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3344 veop, modname, imop);
3345 PL_expect = oexpect;
3346 PL_copline = ocopline;
3347 }
e4783991
GS		 3348}
3349
79072805 3350OP *
864dbfa3 3351Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3352{
3353 OP *doop;
3354 GV *gv;
3355
3356 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3357 if (!(gv && GvIMPORTED_CV(gv)))
3358 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3359
3360 if (gv && GvIMPORTED_CV(gv)) {
3361 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3362 append_elem(OP_LIST, term,
3363 scalar(newUNOP(OP_RV2CV, 0,
3364 newGVOP(OP_GV, 0,
3365 gv))))));
3366 }
3367 else {
3368 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3369 }
3370 return doop;
3371}
3372
3373OP *
864dbfa3 3374Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3375{
3376 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3377 list(force_list(subscript)),
3378 list(force_list(listval)) );
79072805
LW		 3379}
3380
76e3520e 3381STATIC I32
cea2e8a9 3382S_list_assignment(pTHX_ register OP *o)
79072805 3383{
11343788 3384 if (!o)
79072805
LW		 3385 return TRUE;
3386
11343788
MB		 3387 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3388 o = cUNOPo->op_first;
79072805 3389
11343788 3390 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3391 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3392 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3393
3394 if (t && f)
3395 return TRUE;
3396 if (t || f)
3397 yyerror("Assignment to both a list and a scalar");
3398 return FALSE;
3399 }
3400
11343788
MB		 3401 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3402 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3403 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3404 return TRUE;
3405
11343788 3406 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3407 return TRUE;
3408
11343788 3409 if (o->op_type == OP_RV2SV)
79072805
LW		 3410 return FALSE;
3411
3412 return FALSE;
3413}
3414
3415OP *
864dbfa3 3416Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3417{
11343788 3418 OP *o;
79072805 3419
a0d0e21e
LW		 3420 if (optype) {
3421 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3422 return newLOGOP(optype, 0,
3423 mod(scalar(left), optype),
3424 newUNOP(OP_SASSIGN, 0, scalar(right)));
3425 }
3426 else {
3427 return newBINOP(optype, OPf_STACKED,
3428 mod(scalar(left), optype), scalar(right));
3429 }
3430 }
3431
79072805 3432 if (list_assignment(left)) {
10c8fecd
GS		 3433 OP *curop;
3434
3280af22
NIS		 3435 PL_modcount = 0;
3436 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3437 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3438 if (PL_eval_start)
3439 PL_eval_start = 0;
748a9306 3440 else {
a0d0e21e
LW		 3441 op_free(left);
3442 op_free(right);
3443 return Nullop;
3444 }
10c8fecd
GS		 3445 curop = list(force_list(left));
3446 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3447 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3448 for (curop = ((LISTOP*)curop)->op_first;
3449 curop; curop = curop->op_sibling)
3450 {
3451 if (curop->op_type == OP_RV2HV &&
3452 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3453 o->op_private |= OPpASSIGN_HASH;
3454 break;
3455 }
3456 }
a0d0e21e 3457 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3458 OP *lastop = o;
3280af22 3459 PL_generation++;
11343788 3460 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3461 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3462 if (curop->op_type == OP_GV) {
638eceb6 3463 GV *gv = cGVOPx_gv(curop);
3280af22 3464 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3465 break;
3280af22 3466 SvCUR(gv) = PL_generation;
79072805 3467 }
748a9306
LW		 3468 else if (curop->op_type == OP_PADSV ||
3469 curop->op_type == OP_PADAV ||
3470 curop->op_type == OP_PADHV ||
3471 curop->op_type == OP_PADANY) {
3280af22 3472 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3473 SV *sv = svp[curop->op_targ];
3280af22 3474 if (SvCUR(sv) == PL_generation)
748a9306 3475 break;
3280af22 3476 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3477 }
79072805
LW		 3478 else if (curop->op_type == OP_RV2CV)
3479 break;
3480 else if (curop->op_type == OP_RV2SV ||
3481 curop->op_type == OP_RV2AV ||
3482 curop->op_type == OP_RV2HV ||
3483 curop->op_type == OP_RV2GV) {
3484 if (lastop->op_type != OP_GV) /* funny deref? */
3485 break;
3486 }
1167e5da
SM		 3487 else if (curop->op_type == OP_PUSHRE) {
3488 if (((PMOP*)curop)->op_pmreplroot) {
b3f5893f
GS		 3489#ifdef USE_ITHREADS
3490 GV *gv = (GV*)PL_curpad[(PADOFFSET)((PMOP*)curop)->op_pmreplroot];
3491#else
1167e5da 3492 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
b3f5893f 3493#endif
3280af22 3494 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3495 break;
3280af22 3496 SvCUR(gv) = PL_generation;
1167e5da
SM		 3497 }
3498 }
79072805
LW		 3499 else
3500 break;
3501 }
3502 lastop = curop;
3503 }
11343788 3504 if (curop != o)
10c8fecd 3505 o->op_private |= OPpASSIGN_COMMON;
79072805 3506 }
c07a80fd 3507 if (right && right->op_type == OP_SPLIT) {
3508 OP* tmpop;
3509 if ((tmpop = ((LISTOP*)right)->op_first) &&
3510 tmpop->op_type == OP_PUSHRE)
3511 {
3512 PMOP *pm = (PMOP*)tmpop;
3513 if (left->op_type == OP_RV2AV &&
3514 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3515 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3516 {
3517 tmpop = ((UNOP*)left)->op_first;
3518 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3519#ifdef USE_ITHREADS
3520 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3521 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3522#else
3523 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3524 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3525#endif
c07a80fd 3526 pm->op_pmflags |= PMf_ONCE;
11343788 3527 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3528 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3529 tmpop->op_sibling = Nullop; /* don't free split */
3530 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3531 op_free(o); /* blow off assign */
54310121 3532 right->op_flags &= ~OPf_WANT;
a5f75d66 3533 /* "I don't know and I don't care." */
c07a80fd 3534 return right;
3535 }
3536 }
3537 else {
e6438c1a 3538 if (PL_modcount < RETURN_UNLIMITED_NUMBER &&
c07a80fd 3539 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3540 {
3541 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3542 if (SvIVX(sv) == 0)
3280af22 3543 sv_setiv(sv, PL_modcount+1);
c07a80fd 3544 }
3545 }
3546 }
3547 }
11343788 3548 return o;
79072805
LW		 3549 }
3550 if (!right)
3551 right = newOP(OP_UNDEF, 0);
3552 if (right->op_type == OP_READLINE) {
3553 right->op_flags |= OPf_STACKED;
463ee0b2 3554 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3555 }
a0d0e21e 3556 else {
3280af22 3557 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3558 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3559 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3560 if (PL_eval_start)
3561 PL_eval_start = 0;
748a9306 3562 else {
11343788 3563 op_free(o);
a0d0e21e
LW		 3564 return Nullop;
3565 }
3566 }
11343788 3567 return o;
79072805
LW		 3568}
3569
3570OP *
864dbfa3 3571Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3572{
bbce6d69 3573 U32 seq = intro_my();
79072805
LW		 3574 register COP *cop;
3575
b7dc083c 3576 NewOp(1101, cop, 1, COP);
57843af0 3577 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3578 cop->op_type = OP_DBSTATE;
22c35a8c 3579 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3580 }
3581 else {
3582 cop->op_type = OP_NEXTSTATE;
22c35a8c 3583 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3584 }
79072805 3585 cop->op_flags = flags;
9d43a755 3586 cop->op_private = (PL_hints & HINT_PRIVATE_MASK);
ff0cee69 3587#ifdef NATIVE_HINTS
3588 cop->op_private |= NATIVE_HINTS;
3589#endif
e24b16f9 3590 PL_compiling.op_private = cop->op_private;
79072805
LW		 3591 cop->op_next = (OP*)cop;
3592
463ee0b2
LW		 3593 if (label) {
3594 cop->cop_label = label;
3280af22 3595 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3596 }
bbce6d69 3597 cop->cop_seq = seq;
3280af22 3598 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3599 if (specialWARN(PL_curcop->cop_warnings))
599cee73 3600 cop->cop_warnings = PL_curcop->cop_warnings ;
1c846c1f 3601 else
599cee73 3602 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
ac27b0f5
NIS		 3603 if (specialCopIO(PL_curcop->cop_io))
3604 cop->cop_io = PL_curcop->cop_io;
3605 else
3606 cop->cop_io = newSVsv(PL_curcop->cop_io) ;
599cee73 3607
79072805 3608
3280af22 3609 if (PL_copline == NOLINE)
57843af0 3610 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3611 else {
57843af0 3612 CopLINE_set(cop, PL_copline);
3280af22 3613 PL_copline = NOLINE;
79072805 3614 }
57843af0 3615#ifdef USE_ITHREADS
f4dd75d9 3616 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */
57843af0 3617#else
f4dd75d9 3618 CopFILEGV_set(cop, CopFILEGV(PL_curcop));
57843af0 3619#endif
11faa288 3620 CopSTASH_set(cop, PL_curstash);
79072805 3621
3280af22 3622 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3623 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3624 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3625 (void)SvIOK_on(*svp);
57b2e452 3626 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3627 }
3628 }
3629
11343788 3630 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3631}
3632
bbce6d69 3633/* "Introduce" my variables to visible status. */
3634U32
864dbfa3 3635Perl_intro_my(pTHX)
bbce6d69 3636{
3637 SV **svp;
3638 SV *sv;
3639 I32 i;
3640
3280af22
NIS		 3641 if (! PL_min_intro_pending)
3642 return PL_cop_seqmax;
bbce6d69 3643
3280af22
NIS		 3644 svp = AvARRAY(PL_comppad_name);
3645 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3646 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3647 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3648 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3649 }
3650 }
3280af22
NIS		 3651 PL_min_intro_pending = 0;
3652 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3653 return PL_cop_seqmax++;
bbce6d69 3654}
3655
79072805 3656OP *
864dbfa3 3657Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3658{
883ffac3
CS		 3659 return new_logop(type, flags, &first, &other);
3660}
3661
3bd495df 3662STATIC OP *
cea2e8a9 3663S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3664{
79072805 3665 LOGOP *logop;
11343788 3666 OP *o;
883ffac3
CS		 3667 OP *first = *firstp;
3668 OP *other = *otherp;
79072805 3669
a0d0e21e
LW		 3670 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3671 return newBINOP(type, flags, scalar(first), scalar(other));
3672
8990e307 3673 scalarboolean(first);
79072805
LW		 3674 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3675 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3676 if (type == OP_AND || type == OP_OR) {
3677 if (type == OP_AND)
3678 type = OP_OR;
3679 else
3680 type = OP_AND;
11343788 3681 o = first;
883ffac3 3682 first = *firstp = cUNOPo->op_first;
11343788
MB		 3683 if (o->op_next)
3684 first->op_next = o->op_next;
3685 cUNOPo->op_first = Nullop;
3686 op_free(o);
79072805
LW		 3687 }
3688 }
3689 if (first->op_type == OP_CONST) {
4673fc70 3690 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
1c846c1f 3691 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3692 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3693 op_free(first);
883ffac3 3694 *firstp = Nullop;
79072805
LW		 3695 return other;
3696 }
3697 else {
3698 op_free(other);
883ffac3 3699 *otherp = Nullop;
79072805
LW		 3700 return first;
3701 }
3702 }
3703 else if (first->op_type == OP_WANTARRAY) {
3704 if (type == OP_AND)
3705 list(other);
3706 else
3707 scalar(other);
3708 }
e476b1b5 3709 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3710 OP *k1 = ((UNOP*)first)->op_first;
3711 OP *k2 = k1->op_sibling;
3712 OPCODE warnop = 0;
3713 switch (first->op_type)
3714 {
3715 case OP_NULL:
3716 if (k2 && k2->op_type == OP_READLINE
3717 && (k2->op_flags & OPf_STACKED)
1c846c1f 3718 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3719 {
a6006777 3720 warnop = k2->op_type;
72b16652 3721 }
a6006777 3722 break;
3723
3724 case OP_SASSIGN:
68dc0745 3725 if (k1->op_type == OP_READDIR
3726 || k1->op_type == OP_GLOB
72b16652 3727 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3728 || k1->op_type == OP_EACH)
72b16652
GS		 3729 {
3730 warnop = ((k1->op_type == OP_NULL)
3731 ? k1->op_targ : k1->op_type);
3732 }
a6006777 3733 break;
3734 }
8ebc5c01 3735 if (warnop) {
57843af0
GS		 3736 line_t oldline = CopLINE(PL_curcop);
3737 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3738 Perl_warner(aTHX_ WARN_MISC,
599cee73 3739 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3740 PL_op_desc[warnop],
68dc0745 3741 ((warnop == OP_READLINE || warnop == OP_GLOB)
3742 ? " construct" : "() operator"));
57843af0 3743 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3744 }
a6006777 3745 }
79072805
LW		 3746
3747 if (!other)
3748 return first;
3749
a0d0e21e
LW		 3750 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3751 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3752
b7dc083c 3753 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3754
3755 logop->op_type = type;
22c35a8c 3756 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3757 logop->op_first = first;
3758 logop->op_flags = flags | OPf_KIDS;
3759 logop->op_other = LINKLIST(other);
c07a80fd 3760 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3761
3762 /* establish postfix order */
3763 logop->op_next = LINKLIST(first);
3764 first->op_next = (OP*)logop;
3765 first->op_sibling = other;
3766
11343788
MB		 3767 o = newUNOP(OP_NULL, 0, (OP*)logop);
3768 other->op_next = o;
79072805 3769
11343788 3770 return o;
79072805
LW		 3771}
3772
3773OP *
864dbfa3 3774Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3775{
1a67a97c
SM		 3776 LOGOP *logop;
3777 OP *start;
11343788 3778 OP *o;
79072805 3779
b1cb66bf 3780 if (!falseop)
3781 return newLOGOP(OP_AND, 0, first, trueop);
3782 if (!trueop)
3783 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3784
8990e307 3785 scalarboolean(first);
79072805
LW		 3786 if (first->op_type == OP_CONST) {
3787 if (SvTRUE(((SVOP*)first)->op_sv)) {
3788 op_free(first);
b1cb66bf 3789 op_free(falseop);
3790 return trueop;
79072805
LW		 3791 }
3792 else {
3793 op_free(first);
b1cb66bf 3794 op_free(trueop);
3795 return falseop;
79072805
LW		 3796 }
3797 }
3798 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3799 list(trueop);
3800 scalar(falseop);
79072805 3801 }
1a67a97c
SM		 3802 NewOp(1101, logop, 1, LOGOP);
3803 logop->op_type = OP_COND_EXPR;
3804 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3805 logop->op_first = first;
3806 logop->op_flags = flags | OPf_KIDS;
3807 logop->op_private = 1 | (flags >> 8);
3808 logop->op_other = LINKLIST(trueop);
3809 logop->op_next = LINKLIST(falseop);
79072805 3810
79072805
LW		 3811
3812 /* establish postfix order */
1a67a97c
SM		 3813 start = LINKLIST(first);
3814 first->op_next = (OP*)logop;
79072805 3815
b1cb66bf 3816 first->op_sibling = trueop;
3817 trueop->op_sibling = falseop;
1a67a97c 3818 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3819
1a67a97c 3820 trueop->op_next = falseop->op_next = o;
79072805 3821
1a67a97c 3822 o->op_next = start;
11343788 3823 return o;
79072805
LW		 3824}
3825
3826OP *
864dbfa3 3827Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3828{
1a67a97c 3829 LOGOP *range;
79072805
LW		 3830 OP *flip;
3831 OP *flop;
1a67a97c 3832 OP *leftstart;
11343788 3833 OP *o;
79072805 3834
1a67a97c 3835 NewOp(1101, range, 1, LOGOP);
79072805 3836
1a67a97c
SM		 3837 range->op_type = OP_RANGE;
3838 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3839 range->op_first = left;
3840 range->op_flags = OPf_KIDS;
3841 leftstart = LINKLIST(left);
3842 range->op_other = LINKLIST(right);
3843 range->op_private = 1 | (flags >> 8);
79072805
LW		 3844
3845 left->op_sibling = right;
3846
1a67a97c
SM		 3847 range->op_next = (OP*)range;
3848 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3849 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3850 o = newUNOP(OP_NULL, 0, flop);
79072805 3851 linklist(flop);
1a67a97c 3852 range->op_next = leftstart;
79072805
LW		 3853
3854 left->op_next = flip;
3855 right->op_next = flop;
3856
1a67a97c
SM		 3857 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3858 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3859 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3860 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3861
3862 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3863 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3864
11343788 3865 flip->op_next = o;
79072805 3866 if (!flip->op_private || !flop->op_private)
11343788 3867 linklist(o); /* blow off optimizer unless constant */
79072805 3868
11343788 3869 return o;
79072805
LW		 3870}
3871
3872OP *
864dbfa3 3873Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3874{
463ee0b2 3875 OP* listop;
11343788 3876 OP* o;
463ee0b2 3877 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3878 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3879
463ee0b2
LW		 3880 if (expr) {
3881 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3882 return block; /* do {} while 0 does once */
fb73857a 3883 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3884 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3885 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3886 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3887 } else if (expr->op_flags & OPf_KIDS) {
3888 OP *k1 = ((UNOP*)expr)->op_first;
3889 OP *k2 = (k1) ? k1->op_sibling : NULL;
3890 switch (expr->op_type) {
1c846c1f 3891 case OP_NULL:
55d729e4
GS		 3892 if (k2 && k2->op_type == OP_READLINE
3893 && (k2->op_flags & OPf_STACKED)
1c846c1f 3894 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3895 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3896 break;
55d729e4
GS		 3897
3898 case OP_SASSIGN:
3899 if (k1->op_type == OP_READDIR
3900 || k1->op_type == OP_GLOB
72b16652 3901 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3902 || k1->op_type == OP_EACH)
3903 expr = newUNOP(OP_DEFINED, 0, expr);
3904 break;
3905 }
774d564b 3906 }
463ee0b2 3907 }
93a17b20 3908
8990e307 3909 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3910 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3911
883ffac3
CS		 3912 if (listop)
3913 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3914
11343788
MB		 3915 if (once && o != listop)
3916 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3917
11343788
MB		 3918 if (o == listop)
3919 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3920
11343788
MB		 3921 o->op_flags |= flags;
3922 o = scope(o);
3923 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3924 return o;
79072805
LW		 3925}
3926
3927OP *
864dbfa3 3928Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805
LW		 3929{
3930 OP *redo;
3931 OP *next = 0;
3932 OP *listop;
11343788 3933 OP *o;
79072805 3934 OP *condop;
1ba6ee2b 3935 U8 loopflags = 0;
79072805 3936
fb73857a 3937 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3938 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3939 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3940 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3941 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3942 OP *k1 = ((UNOP*)expr)->op_first;
3943 OP *k2 = (k1) ? k1->op_sibling : NULL;
3944 switch (expr->op_type) {
1c846c1f 3945 case OP_NULL:
55d729e4
GS		 3946 if (k2 && k2->op_type == OP_READLINE
3947 && (k2->op_flags & OPf_STACKED)
1c846c1f 3948 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3949 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3950 break;
55d729e4
GS		 3951
3952 case OP_SASSIGN:
3953 if (k1->op_type == OP_READDIR
3954 || k1->op_type == OP_GLOB
72b16652 3955 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3956 || k1->op_type == OP_EACH)
3957 expr = newUNOP(OP_DEFINED, 0, expr);
3958 break;
3959 }
748a9306 3960 }
79072805
LW		 3961
3962 if (!block)
3963 block = newOP(OP_NULL, 0);
87246558
GS		 3964 else if (cont) {
3965 block = scope(block);
3966 }
79072805 3967
1ba6ee2b 3968 if (cont) {
79072805 3969 next = LINKLIST(cont);
1ba6ee2b 3970 }
fb73857a 3971 if (expr) {
85538317
GS		 3972 OP *unstack = newOP(OP_UNSTACK, 0);
3973 if (!next)
3974 next = unstack;
3975 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3976 if ((line_t)whileline != NOLINE) {
3280af22 3977 PL_copline = whileline;
fb73857a 3978 cont = append_elem(OP_LINESEQ, cont,
3979 newSTATEOP(0, Nullch, Nullop));
3980 }
3981 }
79072805 3982
463ee0b2 3983 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3984 redo = LINKLIST(listop);
3985
3986 if (expr) {
3280af22 3987 PL_copline = whileline;
883ffac3
CS		 3988 scalar(listop);
3989 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3990 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3991 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3992 op_free((OP*)loop);
883ffac3 3993 return Nullop; /* listop already freed by new_logop */
463ee0b2 3994 }
883ffac3
CS		 3995 if (listop)
3996 ((LISTOP*)listop)->op_last->op_next = condop =
3997 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3998 }
3999 else
11343788 4000 o = listop;
79072805
LW		 4001
4002 if (!loop) {
b7dc083c 4003 NewOp(1101,loop,1,LOOP);
79072805 4004 loop->op_type = OP_ENTERLOOP;
22c35a8c 4005 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 4006 loop->op_private = 0;
4007 loop->op_next = (OP*)loop;
4008 }
4009
11343788 4010 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 4011
4012 loop->op_redoop = redo;
11343788 4013 loop->op_lastop = o;
1ba6ee2b 4014 o->op_private |= loopflags;
79072805
LW		 4015
4016 if (next)
4017 loop->op_nextop = next;
4018 else
11343788 4019 loop->op_nextop = o;
79072805 4020
11343788
MB		 4021 o->op_flags |= flags;
4022 o->op_private |= (flags >> 8);
4023 return o;
79072805
LW		 4024}
4025
4026OP *
864dbfa3 4027Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 4028{
4029 LOOP *loop;
fb73857a 4030 OP *wop;
85e6fe83 4031 int padoff = 0;
4633a7c4 4032 I32 iterflags = 0;
79072805 4033
79072805 4034 if (sv) {
85e6fe83 4035 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 4036 sv->op_type = OP_RV2GV;
22c35a8c 4037 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 4038 }
85e6fe83
LW		 4039 else if (sv->op_type == OP_PADSV) { /* private variable */
4040 padoff = sv->op_targ;
743e66e6 4041 sv->op_targ = 0;
85e6fe83
LW		 4042 op_free(sv);
4043 sv = Nullop;
4044 }
54b9620d
MB		 4045 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
4046 padoff = sv->op_targ;
743e66e6 4047 sv->op_targ = 0;
54b9620d
MB		 4048 iterflags |= OPf_SPECIAL;
4049 op_free(sv);
4050 sv = Nullop;
4051 }
79072805 4052 else
cea2e8a9 4053 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 4054 }
4055 else {
54b9620d
MB		 4056#ifdef USE_THREADS
4057 padoff = find_threadsv("_");
4058 iterflags |= OPf_SPECIAL;
4059#else
3280af22 4060 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 4061#endif
79072805 4062 }
5f05dabc 4063 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 4064 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 4065 iterflags |= OPf_STACKED;
4066 }
89ea2908
GA		 4067 else if (expr->op_type == OP_NULL &&
4068 (expr->op_flags & OPf_KIDS) &&
4069 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
4070 {
4071 /* Basically turn for($x..$y) into the same as for($x,$y), but we
4072 * set the STACKED flag to indicate that these values are to be
4073 * treated as min/max values by 'pp_iterinit'.
4074 */
4075 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 4076 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 4077 OP* left = range->op_first;
4078 OP* right = left->op_sibling;
5152d7c7 4079 LISTOP* listop;
89ea2908
GA		 4080
4081 range->op_flags &= ~OPf_KIDS;
4082 range->op_first = Nullop;
4083
5152d7c7 4084 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 4085 listop->op_first->op_next = range->op_next;
4086 left->op_next = range->op_other;
5152d7c7
GS		 4087 right->op_next = (OP*)listop;
4088 listop->op_next = listop->op_first;
89ea2908
GA		 4089
4090 op_free(expr);
5152d7c7 4091 expr = (OP*)(listop);
93c66552 4092 op_null(expr);
89ea2908
GA		 4093 iterflags |= OPf_STACKED;
4094 }
4095 else {
4096 expr = mod(force_list(expr), OP_GREPSTART);
4097 }
4098
4099
4633a7c4 4100 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 4101 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 4102 assert(!loop->op_next);
b7dc083c 4103#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 4104 {
4105 LOOP *tmp;
4106 NewOp(1234,tmp,1,LOOP);
4107 Copy(loop,tmp,1,LOOP);
4108 loop = tmp;
4109 }
b7dc083c 4110#else
85e6fe83 4111 Renew(loop, 1, LOOP);
1c846c1f 4112#endif
85e6fe83 4113 loop->op_targ = padoff;
fb73857a 4114 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4115 PL_copline = forline;
fb73857a 4116 return newSTATEOP(0, label, wop);
79072805
LW		 4117}
4118
8990e307 4119OP*
864dbfa3 4120Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4121{
11343788 4122 OP *o;
2d8e6c8d
GS		 4123 STRLEN n_a;
4124
8990e307 4125 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4126 /* "last()" means "last" */
4127 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4128 o = newOP(type, OPf_SPECIAL);
4129 else {
4130 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4131 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4132 : ""));
4133 }
8990e307
LW		 4134 op_free(label);
4135 }
4136 else {
a0d0e21e
LW		 4137 if (label->op_type == OP_ENTERSUB)
4138 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4139 o = newUNOP(type, OPf_STACKED, label);
8990e307 4140 }
3280af22 4141 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4142 return o;
8990e307
LW		 4143}
4144
79072805 4145void
864dbfa3 4146Perl_cv_undef(pTHX_ CV *cv)
79072805 4147{
11343788 4148#ifdef USE_THREADS
e858de61
MB		 4149 if (CvMUTEXP(cv)) {
4150 MUTEX_DESTROY(CvMUTEXP(cv));
4151 Safefree(CvMUTEXP(cv));
4152 CvMUTEXP(cv) = 0;
4153 }
11343788
MB		 4154#endif /* USE_THREADS */
4155
a0d0e21e 4156 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4157#ifdef USE_THREADS
4158 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4159 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4160#else
a0d0e21e 4161 if (CvDEPTH(cv))
cea2e8a9 4162 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4163#endif /* USE_THREADS */
8990e307 4164 ENTER;
a0d0e21e 4165
7766f137 4166 SAVEVPTR(PL_curpad);
3280af22 4167 PL_curpad = 0;
a0d0e21e 4168
282f25c9 4169 op_free(CvROOT(cv));
79072805 4170 CvROOT(cv) = Nullop;
8990e307 4171 LEAVE;
79072805 4172 }
1d5db326 4173 SvPOK_off((SV*)cv); /* forget prototype */
8e07c86e 4174 CvGV(cv) = Nullgv;
282f25c9
JH		 4175 /* Since closure prototypes have the same lifetime as the containing
4176 * CV, they don't hold a refcount on the outside CV. This avoids
4177 * the refcount loop between the outer CV (which keeps a refcount to
4178 * the closure prototype in the pad entry for pp_anoncode()) and the
c975facc
JH		 4179 * closure prototype, and the ensuing memory leak. This does not
4180 * apply to closures generated within eval"", since eval"" CVs are
4181 * ephemeral. --GSAR */
4182 if (!CvANON(cv) || CvCLONED(cv)
f58d1073
GS		 4183 || (CvOUTSIDE(cv) && SvTYPE(CvOUTSIDE(cv)) == SVt_PVCV
4184 && CvEVAL(CvOUTSIDE(cv)) && !CvGV(CvOUTSIDE(cv))))
c975facc 4185 {
282f25c9 4186 SvREFCNT_dec(CvOUTSIDE(cv));
c975facc 4187 }
8e07c86e 4188 CvOUTSIDE(cv) = Nullcv;
beab0874
JT		 4189 if (CvCONST(cv)) {
4190 SvREFCNT_dec((SV*)CvXSUBANY(cv).any_ptr);
4191 CvCONST_off(cv);
4192 }
8e07c86e 4193 if (CvPADLIST(cv)) {
8ebc5c01 4194 /* may be during global destruction */
4195 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4196 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4197 while (i >= 0) {
4198 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4199 SV* sv = svp ? *svp : Nullsv;
4200 if (!sv)
4201 continue;
3280af22
NIS		 4202 if (sv == (SV*)PL_comppad_name)
4203 PL_comppad_name = Nullav;
4204 else if (sv == (SV*)PL_comppad) {
4205 PL_comppad = Nullav;
4206 PL_curpad = Null(SV**);
46fc3d4c 4207 }
4208 SvREFCNT_dec(sv);
8ebc5c01 4209 }
4210 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4211 }
8e07c86e
AD		 4212 CvPADLIST(cv) = Nullav;
4213 }
50762d59
DM		 4214 if (CvXSUB(cv)) {
4215 CvXSUB(cv) = 0;
4216 }
a2c090b3 4217 CvFLAGS(cv) = 0;
79072805
LW		 4218}
4219
9cbac4c7 4220#ifdef DEBUG_CLOSURES
76e3520e 4221STATIC void
743e66e6 4222S_cv_dump(pTHX_ CV *cv)
5f05dabc 4223{
62fde642 4224#ifdef DEBUGGING
5f05dabc 4225 CV *outside = CvOUTSIDE(cv);
4226 AV* padlist = CvPADLIST(cv);
4fdae800 4227 AV* pad_name;
4228 AV* pad;
4229 SV** pname;
4230 SV** ppad;
5f05dabc 4231 I32 ix;
4232
b900a521
JH		 4233 PerlIO_printf(Perl_debug_log,
4234 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4235 PTR2UV(cv),
ab50184a 4236 (CvANON(cv) ? "ANON"
6b88bc9c 4237 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4238 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4239 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4240 PTR2UV(outside),
ab50184a
CS		 4241 (!outside ? "null"
4242 : CvANON(outside) ? "ANON"
6b88bc9c 4243 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4244 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4245 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4246
4fdae800 4247 if (!padlist)
4248 return;
4249
4250 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4251 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4252 pname = AvARRAY(pad_name);
4253 ppad = AvARRAY(pad);
4254
93965878 4255 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4256 if (SvPOK(pname[ix]))
b900a521
JH		 4257 PerlIO_printf(Perl_debug_log,
4258 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4259 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4260 SvFAKE(pname[ix]) ? "FAKE " : "",
4261 SvPVX(pname[ix]),
b900a521
JH		 4262 (IV)I_32(SvNVX(pname[ix])),
4263 SvIVX(pname[ix]));
5f05dabc 4264 }
743e66e6 4265#endif /* DEBUGGING */
62fde642 4266}
9cbac4c7 4267#endif /* DEBUG_CLOSURES */
5f05dabc 4268
76e3520e 4269STATIC CV *
cea2e8a9 4270S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306
LW		 4271{
4272 AV* av;
4273 I32 ix;
4274 AV* protopadlist = CvPADLIST(proto);
4275 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4276 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4277 SV** pname = AvARRAY(protopad_name);
4278 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4279 I32 fname = AvFILLp(protopad_name);
4280 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4281 AV* comppadlist;
4282 CV* cv;
4283
07055b4c
CS		 4284 assert(!CvUNIQUE(proto));
4285
748a9306 4286 ENTER;
354992b1 4287 SAVECOMPPAD();
3280af22
NIS		 4288 SAVESPTR(PL_comppad_name);
4289 SAVESPTR(PL_compcv);
748a9306 4290
3280af22 4291 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4292 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4293 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4294 CvCLONED_on(cv);
748a9306 4295
11343788 4296#ifdef USE_THREADS
12ca11f6 4297 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4298 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4299 CvOWNER(cv) = 0;
4300#endif /* USE_THREADS */
57843af0 4301 CvFILE(cv) = CvFILE(proto);
65c50114 4302 CvGV(cv) = CvGV(proto);
748a9306 4303 CvSTASH(cv) = CvSTASH(proto);
282f25c9 4304 CvROOT(cv) = OpREFCNT_inc(CvROOT(proto));
748a9306 4305 CvSTART(cv) = CvSTART(proto);
5f05dabc 4306 if (outside)
4307 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4308
68dc0745 4309 if (SvPOK(proto))
4310 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4311
3280af22 4312 PL_comppad_name = newAV();
46fc3d4c 4313 for (ix = fname; ix >= 0; ix--)
3280af22 4314 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4315
3280af22 4316 PL_comppad = newAV();
748a9306
LW		 4317
4318 comppadlist = newAV();
4319 AvREAL_off(comppadlist);
3280af22
NIS		 4320 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4321 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4322 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4323 av_fill(PL_comppad, AvFILLp(protopad));
4324 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4325
4326 av = newAV(); /* will be @_ */
4327 av_extend(av, 0);
3280af22 4328 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4329 AvFLAGS(av) = AVf_REIFY;
4330
9607fc9c 4331 for (ix = fpad; ix > 0; ix--) {
4332 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4333 if (namesv && namesv != &PL_sv_undef) {
aa689395 4334 char *name = SvPVX(namesv); /* XXX */
4335 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4336 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4337 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4338 if (!off)
3280af22 4339 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4340 else if (off != ix)
cea2e8a9 4341 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4342 }
4343 else { /* our own lexical */
aa689395 4344 SV* sv;
5f05dabc 4345 if (*name == '&') {
4346 /* anon code -- we'll come back for it */
4347 sv = SvREFCNT_inc(ppad[ix]);
4348 }
4349 else if (*name == '@')
4350 sv = (SV*)newAV();
748a9306 4351 else if (*name == '%')
5f05dabc 4352 sv = (SV*)newHV();
748a9306 4353 else
5f05dabc 4354 sv = NEWSV(0,0);
4355 if (!SvPADBUSY(sv))
4356 SvPADMY_on(sv);
3280af22 4357 PL_curpad[ix] = sv;
748a9306
LW		 4358 }
4359 }
7766f137 4360 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4361 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4362 }
748a9306 4363 else {
aa689395 4364 SV* sv = NEWSV(0,0);
748a9306 4365 SvPADTMP_on(sv);
3280af22 4366 PL_curpad[ix] = sv;
748a9306
LW		 4367 }
4368 }
4369
5f05dabc 4370 /* Now that vars are all in place, clone nested closures. */
4371
9607fc9c 4372 for (ix = fpad; ix > 0; ix--) {
4373 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4374 if (namesv
3280af22 4375 && namesv != &PL_sv_undef
aa689395 4376 && !(SvFLAGS(namesv) & SVf_FAKE)
4377 && *SvPVX(namesv) == '&'
5f05dabc 4378 && CvCLONE(ppad[ix]))
4379 {
4380 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4381 SvREFCNT_dec(ppad[ix]);
4382 CvCLONE_on(kid);
4383 SvPADMY_on(kid);
3280af22 4384 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4385 }
4386 }
4387
5f05dabc 4388#ifdef DEBUG_CLOSURES
ab50184a
CS		 4389 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4390 cv_dump(outside);
4391 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4392 cv_dump(proto);
ab50184a 4393 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4394 cv_dump(cv);
4395#endif
4396
748a9306 4397 LEAVE;
beab0874
JT		 4398
4399 if (CvCONST(cv)) {
4400 SV* const_sv = op_const_sv(CvSTART(cv), cv);
4401 assert(const_sv);
4402 /* constant sub () { $x } closing over $x - see lib/constant.pm */
4403 SvREFCNT_dec(cv);
4404 cv = newCONSTSUB(CvSTASH(proto), 0, const_sv);
4405 }
4406
748a9306
LW		 4407 return cv;
4408}
4409
4410CV *
864dbfa3 4411Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4412{
b099ddc0 4413 CV *cv;
1feb2720 4414 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4415 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4416 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4417 return cv;
5f05dabc 4418}
4419
3fe9a6f1 4420void
864dbfa3 4421Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4422{
e476b1b5 4423 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4424 SV* msg = sv_newmortal();
3fe9a6f1 4425 SV* name = Nullsv;
4426
4427 if (gv)
46fc3d4c 4428 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4429 sv_setpv(msg, "Prototype mismatch:");
4430 if (name)
894356b3 4431 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4432 if (SvPOK(cv))
cea2e8a9 4433 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4434 sv_catpv(msg, " vs ");
4435 if (p)
cea2e8a9 4436 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4437 else
4438 sv_catpv(msg, "none");
e476b1b5 4439 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4440 }
4441}
4442
beab0874
JT		 4443static void const_sv_xsub(pTHXo_ CV* cv);
4444
4445/*
4446=for apidoc cv_const_sv
4447
4448If C<cv> is a constant sub eligible for inlining. returns the constant
4449value returned by the sub. Otherwise, returns NULL.
4450
4451Constant subs can be created with C<newCONSTSUB> or as described in
4452L<perlsub/"Constant Functions">.
4453
4454=cut
4455*/
760ac839 4456SV *
864dbfa3 4457Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4458{
beab0874 4459 if (!cv || !CvCONST(cv))
54310121 4460 return Nullsv;
beab0874 4461 return (SV*)CvXSUBANY(cv).any_ptr;
fe5e78ed 4462}
760ac839 4463
fe5e78ed 4464SV *
864dbfa3 4465Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4466{
4467 SV *sv = Nullsv;
4468
0f79a09d 4469 if (!o)
fe5e78ed 4470 return Nullsv;
1c846c1f
NIS		 4471
4472 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4473 o = cLISTOPo->op_first->op_sibling;
4474
4475 for (; o; o = o->op_next) {
54310121 4476 OPCODE type = o->op_type;
fe5e78ed 4477
1c846c1f 4478 if (sv && o->op_next == o)
fe5e78ed 4479 return sv;
e576b457
JT		 4480 if (o->op_next != o) {
4481 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4482 continue;
4483 if (type == OP_DBSTATE)
4484 continue;
4485 }
54310121 4486 if (type == OP_LEAVESUB || type == OP_RETURN)
4487 break;
4488 if (sv)
4489 return Nullsv;
7766f137 4490 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4491 sv = cSVOPo->op_sv;
7766f137 4492 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4493 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4494 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
beab0874
JT		 4495 if (!sv)
4496 return Nullsv;
4497 if (CvCONST(cv)) {
4498 /* We get here only from cv_clone2() while creating a closure.
4499 Copy the const value here instead of in cv_clone2 so that
4500 SvREADONLY_on doesn't lead to problems when leaving
4501 scope.
4502 */
4503 sv = newSVsv(sv);
4504 }
4505 if (!SvREADONLY(sv) && SvREFCNT(sv) > 1)
54310121 4506 return Nullsv;
760ac839 4507 }
54310121 4508 else
4509 return Nullsv;
760ac839 4510 }
5aabfad6 4511 if (sv)
4512 SvREADONLY_on(sv);
760ac839
LW		 4513 return sv;
4514}
4515
09bef843
SB		 4516void
4517Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4518{
4519 if (o)
4520 SAVEFREEOP(o);
4521 if (proto)
4522 SAVEFREEOP(proto);
4523 if (attrs)
4524 SAVEFREEOP(attrs);
4525 if (block)
4526 SAVEFREEOP(block);
4527 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4528}
4529
748a9306 4530CV *
864dbfa3 4531Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4532{
09bef843
SB		 4533 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4534}
4535
4536CV *
4537Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4538{
2d8e6c8d 4539 STRLEN n_a;
83ee9e09
GS		 4540 char *name;
4541 char *aname;
4542 GV *gv;
2d8e6c8d 4543 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4544 register CV *cv=0;
a0d0e21e 4545 I32 ix;
beab0874 4546 SV *const_sv;
79072805 4547
83ee9e09
GS		 4548 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4549 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4550 SV *sv = sv_newmortal();
4551 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4552 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4553 aname = SvPVX(sv);
4554 }
4555 else
4556 aname = Nullch;
4557 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4558 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4559 SVt_PVCV);
4560
11343788 4561 if (o)
5dc0d613 4562 SAVEFREEOP(o);
3fe9a6f1 4563 if (proto)
4564 SAVEFREEOP(proto);
09bef843
SB		 4565 if (attrs)
4566 SAVEFREEOP(attrs);
3fe9a6f1 4567
09bef843 4568 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4569 maximum a prototype before. */
4570 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4571 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4572 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4573 {
e476b1b5 4574 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4575 }
55d729e4
GS		 4576 cv_ckproto((CV*)gv, NULL, ps);
4577 }
4578 if (ps)
4579 sv_setpv((SV*)gv, ps);
4580 else
4581 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4582 SvREFCNT_dec(PL_compcv);
4583 cv = PL_compcv = NULL;
4584 PL_sub_generation++;
beab0874 4585 goto done;
55d729e4
GS		 4586 }
4587
beab0874
JT		 4588 cv = (!name || GvCVGEN(gv)) ? Nullcv : GvCV(gv);
4589
5bd07a3d
DM		 4590#ifdef GV_SHARED_CHECK
4591 if (cv && GvSHARED(gv) && SvREADONLY(cv)) {
4592 Perl_croak(aTHX_ "Can't define subroutine %s (GV is shared)", name);
4593 }
4594#endif
4595
beab0874
JT		 4596 if (!block || !ps || *ps || attrs)
4597 const_sv = Nullsv;
4598 else
4599 const_sv = op_const_sv(block, Nullcv);
4600
4601 if (cv) {
60ed1d8c 4602 bool exists = CvROOT(cv) || CvXSUB(cv);
5bd07a3d
DM		 4603
4604#ifdef GV_SHARED_CHECK
4605 if (exists && GvSHARED(gv)) {
4606 Perl_croak(aTHX_ "Can't redefine shared subroutine %s", name);
4607 }
4608#endif
4609
60ed1d8c
GS		 4610 /* if the subroutine doesn't exist and wasn't pre-declared
4611 * with a prototype, assume it will be AUTOLOADed,
4612 * skipping the prototype check
4613 */
4614 if (exists || SvPOK(cv))
01ec43d0 4615 cv_ckproto(cv, gv, ps);
68dc0745 4616 /* already defined (or promised)? */
60ed1d8c 4617 if (exists || GvASSUMECV(gv)) {
09bef843 4618 if (!block && !attrs) {
aa689395 4619 /* just a "sub foo;" when &foo is already defined */
3280af22 4620 SAVEFREESV(PL_compcv);
aa689395 4621 goto done;
4622 }
7bac28a0 4623 /* ahem, death to those who redefine active sort subs */
3280af22 4624 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4625 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
beab0874
JT		 4626 if (block) {
4627 if (ckWARN(WARN_REDEFINE)
4628 || (CvCONST(cv)
4629 && (!const_sv || sv_cmp(cv_const_sv(cv), const_sv))))
4630 {
4631 line_t oldline = CopLINE(PL_curcop);
4632 CopLINE_set(PL_curcop, PL_copline);
4633 Perl_warner(aTHX_ WARN_REDEFINE,
4634 CvCONST(cv) ? "Constant subroutine %s redefined"
4635 : "Subroutine %s redefined", name);
4636 CopLINE_set(PL_curcop, oldline);
4637 }
4638 SvREFCNT_dec(cv);
4639 cv = Nullcv;
79072805 4640 }
79072805
LW		 4641 }
4642 }
beab0874
JT		 4643 if (const_sv) {
4644 SvREFCNT_inc(const_sv);
4645 if (cv) {
0768512c 4646 assert(!CvROOT(cv) && !CvCONST(cv));
beab0874
JT		 4647 sv_setpv((SV*)cv, ""); /* prototype is "" */
4648 CvXSUBANY(cv).any_ptr = const_sv;
4649 CvXSUB(cv) = const_sv_xsub;
4650 CvCONST_on(cv);
beab0874
JT		 4651 }
4652 else {
4653 GvCV(gv) = Nullcv;
4654 cv = newCONSTSUB(NULL, name, const_sv);
4655 }
4656 op_free(block);
4657 SvREFCNT_dec(PL_compcv);
4658 PL_compcv = NULL;
4659 PL_sub_generation++;
4660 goto done;
4661 }
09bef843
SB		 4662 if (attrs) {
4663 HV *stash;
4664 SV *rcv;
4665
4666 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4667 * before we clobber PL_compcv.
4668 */
4669 if (cv && !block) {
4670 rcv = (SV*)cv;
a9164de8 4671 if (CvGV(cv) && GvSTASH(CvGV(cv)))
09bef843 4672 stash = GvSTASH(CvGV(cv));
a9164de8 4673 else if (CvSTASH(cv))
09bef843
SB		 4674 stash = CvSTASH(cv);
4675 else
4676 stash = PL_curstash;
4677 }
4678 else {
4679 /* possibly about to re-define existing subr -- ignore old cv */
4680 rcv = (SV*)PL_compcv;
a9164de8 4681 if (name && GvSTASH(gv))
09bef843
SB		 4682 stash = GvSTASH(gv);
4683 else
4684 stash = PL_curstash;
4685 }
4686 apply_attrs(stash, rcv, attrs);
4687 }
a0d0e21e 4688 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4689 if (!block) {
4690 /* got here with just attrs -- work done, so bug out */
4691 SAVEFREESV(PL_compcv);
4692 goto done;
4693 }
4633a7c4 4694 cv_undef(cv);
3280af22
NIS		 4695 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4696 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4697 CvOUTSIDE(PL_compcv) = 0;
4698 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4699 CvPADLIST(PL_compcv) = 0;
282f25c9
JH		 4700 /* inner references to PL_compcv must be fixed up ... */
4701 {
4702 AV *padlist = CvPADLIST(cv);
4703 AV *comppad_name = (AV*)AvARRAY(padlist)[0];
4704 AV *comppad = (AV*)AvARRAY(padlist)[1];
4705 SV **namepad = AvARRAY(comppad_name);
4706 SV **curpad = AvARRAY(comppad);
4707 for (ix = AvFILLp(comppad_name); ix > 0; ix--) {
4708 SV *namesv = namepad[ix];
4709 if (namesv && namesv != &PL_sv_undef
4710 && *SvPVX(namesv) == '&')
4711 {
4712 CV *innercv = (CV*)curpad[ix];
4713 if (CvOUTSIDE(innercv) == PL_compcv) {
4714 CvOUTSIDE(innercv) = cv;
4715 if (!CvANON(innercv) || CvCLONED(innercv)) {
4716 (void)SvREFCNT_inc(cv);
4717 SvREFCNT_dec(PL_compcv);
4718 }
4719 }
4720 }
4721 }
4722 }
4723 /* ... before we throw it away */
3280af22 4724 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4725 }
4726 else {
3280af22 4727 cv = PL_compcv;
44a8e56a 4728 if (name) {
4729 GvCV(gv) = cv;
4730 GvCVGEN(gv) = 0;
3280af22 4731 PL_sub_generation++;
44a8e56a 4732 }
a0d0e21e 4733 }
65c50114 4734 CvGV(cv) = gv;
57843af0 4735 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4736 CvSTASH(cv) = PL_curstash;
11343788
MB		 4737#ifdef USE_THREADS
4738 CvOWNER(cv) = 0;
1cfa4ec7 4739 if (!CvMUTEXP(cv)) {
f6aaf501 4740 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4741 MUTEX_INIT(CvMUTEXP(cv));
4742 }
11343788 4743#endif /* USE_THREADS */
8990e307 4744
3fe9a6f1 4745 if (ps)
4746 sv_setpv((SV*)cv, ps);
4633a7c4 4747
3280af22 4748 if (PL_error_count) {
c07a80fd 4749 op_free(block);
4750 block = Nullop;
68dc0745 4751 if (name) {
4752 char *s = strrchr(name, ':');
4753 s = s ? s+1 : name;
6d4c2119
CS		 4754 if (strEQ(s, "BEGIN")) {
4755 char *not_safe =
4756 "BEGIN not safe after errors--compilation aborted";
faef0170 4757 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4758 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4759 else {
4760 /* force display of errors found but not reported */
38a03e6e 4761 sv_catpv(ERRSV, not_safe);
cea2e8a9 4762 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4763 }
4764 }
68dc0745 4765 }
c07a80fd 4766 }
beab0874
JT		 4767 if (!block)
4768 goto done;
a0d0e21e 4769
3280af22
NIS		 4770 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4771 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4772
7766f137 4773 if (CvLVALUE(cv)) {
78f9721b
SM		 4774 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0,
4775 mod(scalarseq(block), OP_LEAVESUBLV));
7766f137
GS		 4776 }
4777 else {
4778 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4779 }
4780 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4781 OpREFCNT_set(CvROOT(cv), 1);
4782 CvSTART(cv) = LINKLIST(CvROOT(cv));
4783 CvROOT(cv)->op_next = 0;
4784 peep(CvSTART(cv));
4785
4786 /* now that optimizer has done its work, adjust pad values */
54310121 4787 if (CvCLONE(cv)) {
3280af22
NIS		 4788 SV **namep = AvARRAY(PL_comppad_name);
4789 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4790 SV *namesv;
4791
7766f137 4792 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4793 continue;
4794 /*
4795 * The only things that a clonable function needs in its
4796 * pad are references to outer lexicals and anonymous subs.
4797 * The rest are created anew during cloning.
4798 */
4799 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4800 namesv != &PL_sv_undef &&
54310121 4801 (SvFAKE(namesv) ||
4802 *SvPVX(namesv) == '&')))
4803 {
3280af22
NIS		 4804 SvREFCNT_dec(PL_curpad[ix]);
4805 PL_curpad[ix] = Nullsv;
54310121 4806 }
4807 }
beab0874
JT		 4808 assert(!CvCONST(cv));
4809 if (ps && !*ps && op_const_sv(block, cv))
4810 CvCONST_on(cv);
a0d0e21e 4811 }
54310121 4812 else {
4813 AV *av = newAV(); /* Will be @_ */
4814 av_extend(av, 0);
3280af22 4815 av_store(PL_comppad, 0, (SV*)av);
54310121 4816 AvFLAGS(av) = AVf_REIFY;
79072805 4817
3280af22 4818 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4819 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4820 continue;
3280af22
NIS		 4821 if (!SvPADMY(PL_curpad[ix]))
4822 SvPADTMP_on(PL_curpad[ix]);
54310121 4823 }
4824 }
79072805 4825
c975facc
JH		 4826 /* If a potential closure prototype, don't keep a refcount on
4827 * outer CV, unless the latter happens to be a passing eval"".
282f25c9
JH		 4828 * This is okay as the lifetime of the prototype is tied to the
4829 * lifetime of the outer CV. Avoids memory leak due to reference
4830 * loop. --GSAR */
c975facc 4831 if (!name && CvOUTSIDE(cv)
f58d1073
GS		 4832 && !(SvTYPE(CvOUTSIDE(cv)) == SVt_PVCV
4833 && CvEVAL(CvOUTSIDE(cv)) && !CvGV(CvOUTSIDE(cv))))
c975facc 4834 {
282f25c9 4835 SvREFCNT_dec(CvOUTSIDE(cv));
c975facc 4836 }
282f25c9 4837
83ee9e09 4838 if (name || aname) {
44a8e56a 4839 char *s;
83ee9e09 4840 char *tname = (name ? name : aname);
44a8e56a 4841
3280af22 4842 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4843 SV *sv = NEWSV(0,0);
44a8e56a 4844 SV *tmpstr = sv_newmortal();
549bb64a 4845 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4846 CV *pcv;
44a8e56a 4847 HV *hv;
4848
ed094faf
GS		 4849 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4850 CopFILE(PL_curcop),
cc49e20b 4851 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4852 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4853 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4854 hv = GvHVn(db_postponed);
9607fc9c 4855 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4856 && (pcv = GvCV(db_postponed)))
4857 {
44a8e56a 4858 dSP;
924508f0 4859 PUSHMARK(SP);
44a8e56a 4860 XPUSHs(tmpstr);
4861 PUTBACK;
83ee9e09 4862 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4863 }
4864 }
79072805 4865
83ee9e09 4866 if ((s = strrchr(tname,':')))
28757baa 4867 s++;
4868 else
83ee9e09 4869 s = tname;
ed094faf 4870
7d30b5c4 4871 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4872 goto done;
4873
68dc0745 4874 if (strEQ(s, "BEGIN")) {
3280af22 4875 I32 oldscope = PL_scopestack_ix;
28757baa 4876 ENTER;
57843af0
GS		 4877 SAVECOPFILE(&PL_compiling);
4878 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4879 save_svref(&PL_rs);
4880 sv_setsv(PL_rs, PL_nrs);
28757baa 4881
3280af22
NIS		 4882 if (!PL_beginav)
4883 PL_beginav = newAV();
28757baa 4884 DEBUG_x( dump_sub(gv) );
ea2f84a3
GS		 4885 av_push(PL_beginav, (SV*)cv);
4886 GvCV(gv) = 0; /* cv has been hijacked */
3280af22 4887 call_list(oldscope, PL_beginav);
a6006777 4888
3280af22 4889 PL_curcop = &PL_compiling;
a0ed51b3 4890 PL_compiling.op_private = PL_hints;
28757baa 4891 LEAVE;
4892 }
3280af22
NIS		 4893 else if (strEQ(s, "END") && !PL_error_count) {
4894 if (!PL_endav)
4895 PL_endav = newAV();
ed094faf 4896 DEBUG_x( dump_sub(gv) );
3280af22 4897 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4898 av_store(PL_endav, 0, (SV*)cv);
4899 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4900 }
7d30b5c4
GS		 4901 else if (strEQ(s, "CHECK") && !PL_error_count) {
4902 if (!PL_checkav)
4903 PL_checkav = newAV();
ed094faf 4904 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4905 if (PL_main_start && ckWARN(WARN_VOID))
4906 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4907 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4908 av_store(PL_checkav, 0, (SV*)cv);
4909 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4910 }
3280af22
NIS		 4911 else if (strEQ(s, "INIT") && !PL_error_count) {
4912 if (!PL_initav)
4913 PL_initav = newAV();
ed094faf 4914 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4915 if (PL_main_start && ckWARN(WARN_VOID))
4916 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4917 av_push(PL_initav, (SV*)cv);
4918 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4919 }
79072805 4920 }
a6006777 4921
aa689395 4922 done:
3280af22 4923 PL_copline = NOLINE;
8990e307 4924 LEAVE_SCOPE(floor);
a0d0e21e 4925 return cv;
79072805
LW		 4926}
4927
b099ddc0 4928/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4929/*
4930=for apidoc newCONSTSUB
4931
4932Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4933eligible for inlining at compile-time.
4934
4935=cut
4936*/
4937
beab0874 4938CV *
864dbfa3 4939Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433 4940{
beab0874 4941 CV* cv;
5476c433 4942
11faa288 4943 ENTER;
11faa288 4944
f4dd75d9 4945 SAVECOPLINE(PL_curcop);
11faa288 4946 CopLINE_set(PL_curcop, PL_copline);
f4dd75d9
GS		 4947
4948 SAVEHINTS();
3280af22 4949 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4950
4951 if (stash) {
4952 SAVESPTR(PL_curstash);
4953 SAVECOPSTASH(PL_curcop);
4954 PL_curstash = stash;
4955#ifdef USE_ITHREADS
4956 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4957#else
4958 CopSTASH(PL_curcop) = stash;
4959#endif
4960 }
5476c433 4961
beab0874
JT		 4962 cv = newXS(name, const_sv_xsub, __FILE__);
4963 CvXSUBANY(cv).any_ptr = sv;
4964 CvCONST_on(cv);
4965 sv_setpv((SV*)cv, ""); /* prototype is "" */
5476c433 4966
11faa288 4967 LEAVE;
beab0874
JT		 4968
4969 return cv;
5476c433
JD		 4970}
4971
954c1994
GS		 4972/*
4973=for apidoc U||newXS
4974
4975Used by C<xsubpp> to hook up XSUBs as Perl subs.
4976
4977=cut
4978*/
4979
57d3b86d 4980CV *
864dbfa3 4981Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4982{
44a8e56a 4983 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4984 register CV *cv;
44a8e56a 4985
155aba94 4986 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4987 if (GvCVGEN(gv)) {
4988 /* just a cached method */
4989 SvREFCNT_dec(cv);
4990 cv = 0;
4991 }
4992 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4993 /* already defined (or promised) */
599cee73 4994 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4 4995 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4996 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4997 if (PL_copline != NOLINE)
57843af0 4998 CopLINE_set(PL_curcop, PL_copline);
beab0874
JT		 4999 Perl_warner(aTHX_ WARN_REDEFINE,
5000 CvCONST(cv) ? "Constant subroutine %s redefined"
5001 : "Subroutine %s redefined"
5002 ,name);
57843af0 5003 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 5004 }
5005 SvREFCNT_dec(cv);
5006 cv = 0;
79072805 5007 }
79072805 5008 }
44a8e56a 5009
5010 if (cv) /* must reuse cv if autoloaded */
5011 cv_undef(cv);
a0d0e21e
LW		 5012 else {
5013 cv = (CV*)NEWSV(1105,0);
5014 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 5015 if (name) {
5016 GvCV(gv) = cv;
5017 GvCVGEN(gv) = 0;
3280af22 5018 PL_sub_generation++;
44a8e56a 5019 }
a0d0e21e 5020 }
65c50114 5021 CvGV(cv) = gv;
11343788 5022#ifdef USE_THREADS
12ca11f6 5023 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 5024 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 5025 CvOWNER(cv) = 0;
5026#endif /* USE_THREADS */
b195d487 5027 (void)gv_fetchfile(filename);
57843af0
GS		 5028 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
5029 an external constant string */
a0d0e21e 5030 CvXSUB(cv) = subaddr;
44a8e56a 5031
28757baa 5032 if (name) {
5033 char *s = strrchr(name,':');
5034 if (s)
5035 s++;
5036 else
5037 s = name;
ed094faf 5038
7d30b5c4 5039 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 5040 goto done;
5041
28757baa 5042 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 5043 if (!PL_beginav)
5044 PL_beginav = newAV();
ea2f84a3
GS		 5045 av_push(PL_beginav, (SV*)cv);
5046 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 5047 }
5048 else if (strEQ(s, "END")) {
3280af22
NIS		 5049 if (!PL_endav)
5050 PL_endav = newAV();
5051 av_unshift(PL_endav, 1);
ea2f84a3
GS		 5052 av_store(PL_endav, 0, (SV*)cv);
5053 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 5054 }
7d30b5c4
GS		 5055 else if (strEQ(s, "CHECK")) {
5056 if (!PL_checkav)
5057 PL_checkav = newAV();
ddda08b7
GS		 5058 if (PL_main_start && ckWARN(WARN_VOID))
5059 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 5060 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 5061 av_store(PL_checkav, 0, (SV*)cv);
5062 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 5063 }
7d07dbc2 5064 else if (strEQ(s, "INIT")) {
3280af22
NIS		 5065 if (!PL_initav)
5066 PL_initav = newAV();
ddda08b7
GS		 5067 if (PL_main_start && ckWARN(WARN_VOID))
5068 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 5069 av_push(PL_initav, (SV*)cv);
5070 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 5071 }
28757baa 5072 }
8990e307 5073 else
a5f75d66 5074 CvANON_on(cv);
44a8e56a 5075
ed094faf 5076done:
a0d0e21e 5077 return cv;
79072805
LW		 5078}
5079
5080void
864dbfa3 5081Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805
LW		 5082{
5083 register CV *cv;
5084 char *name;
5085 GV *gv;
a0d0e21e 5086 I32 ix;
2d8e6c8d 5087 STRLEN n_a;
79072805 5088
11343788 5089 if (o)
2d8e6c8d 5090 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 5091 else
5092 name = "STDOUT";
85e6fe83 5093 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
5bd07a3d
DM		 5094#ifdef GV_SHARED_CHECK
5095 if (GvSHARED(gv)) {
5096 Perl_croak(aTHX_ "Bad symbol for form (GV is shared)");
5097 }
5098#endif
a5f75d66 5099 GvMULTI_on(gv);
155aba94 5100 if ((cv = GvFORM(gv))) {
599cee73 5101 if (ckWARN(WARN_REDEFINE)) {
57843af0 5102 line_t oldline = CopLINE(PL_curcop);
79072805 5103
57843af0 5104 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 5105 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 5106 CopLINE_set(PL_curcop, oldline);
79072805 5107 }
8990e307 5108 SvREFCNT_dec(cv);
79072805 5109 }
3280af22 5110 cv = PL_compcv;
79072805 5111 GvFORM(gv) = cv;
65c50114 5112 CvGV(cv) = gv;
57843af0 5113 CvFILE(cv) = CopFILE(PL_curcop);
79072805 5114
3280af22
NIS		 5115 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
5116 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
5117 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 5118 }
5119
79072805 5120 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 5121 CvROOT(cv)->op_private |= OPpREFCOUNTED;
5122 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 5123 CvSTART(cv) = LINKLIST(CvROOT(cv));
5124 CvROOT(cv)->op_next = 0;
5125 peep(CvSTART(cv));
11343788 5126 op_free(o);
3280af22 5127 PL_copline = NOLINE;
8990e307 5128 LEAVE_SCOPE(floor);
79072805
LW		 5129}
5130
5131OP *
864dbfa3 5132Perl_newANONLIST(pTHX_ OP *o)
79072805 5133{
93a17b20 5134 return newUNOP(OP_REFGEN, 0,
11343788 5135 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 5136}
5137
5138OP *
864dbfa3 5139Perl_newANONHASH(pTHX_ OP *o)
79072805 5140{
93a17b20 5141 return newUNOP(OP_REFGEN, 0,
11343788 5142 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 5143}
5144
5145OP *
864dbfa3 5146Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 5147{
09bef843
SB		 5148 return newANONATTRSUB(floor, proto, Nullop, block);
5149}
5150
5151OP *
5152Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
5153{
a0d0e21e 5154 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 5155 newSVOP(OP_ANONCODE, 0,
5156 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 5157}
5158
5159OP *
864dbfa3 5160Perl_oopsAV(pTHX_ OP *o)
79072805 5161{
ed6116ce
LW		 5162 switch (o->op_type) {
5163 case OP_PADSV:
5164 o->op_type = OP_PADAV;
22c35a8c 5165 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 5166 return ref(o, OP_RV2AV);
ed6116ce
LW		 5167
5168 case OP_RV2SV:
79072805 5169 o->op_type = OP_RV2AV;
22c35a8c 5170 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 5171 ref(o, OP_RV2AV);
ed6116ce
LW		 5172 break;
5173
5174 default:
0453d815
PM		 5175 if (ckWARN_d(WARN_INTERNAL))
5176 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 5177 break;
5178 }
79072805
LW		 5179 return o;
5180}
5181
5182OP *
864dbfa3 5183Perl_oopsHV(pTHX_ OP *o)
79072805 5184{
ed6116ce
LW		 5185 switch (o->op_type) {
5186 case OP_PADSV:
5187 case OP_PADAV:
5188 o->op_type = OP_PADHV;
22c35a8c 5189 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 5190 return ref(o, OP_RV2HV);
ed6116ce
LW		 5191
5192 case OP_RV2SV:
5193 case OP_RV2AV:
79072805 5194 o->op_type = OP_RV2HV;
22c35a8c 5195 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 5196 ref(o, OP_RV2HV);
ed6116ce
LW		 5197 break;
5198
5199 default:
0453d815
PM		 5200 if (ckWARN_d(WARN_INTERNAL))
5201 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 5202 break;
5203 }
79072805
LW		 5204 return o;
5205}
5206
5207OP *
864dbfa3 5208Perl_newAVREF(pTHX_ OP *o)
79072805 5209{
ed6116ce
LW		 5210 if (o->op_type == OP_PADANY) {
5211 o->op_type = OP_PADAV;
22c35a8c 5212 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 5213 return o;
ed6116ce 5214 }
a1063b2d
RH		 5215 else if ((o->op_type == OP_RV2AV || o->op_type == OP_PADAV)
5216 && ckWARN(WARN_DEPRECATED)) {
5217 Perl_warner(aTHX_ WARN_DEPRECATED,
5218 "Using an array as a reference is deprecated");
5219 }
79072805
LW		 5220 return newUNOP(OP_RV2AV, 0, scalar(o));
5221}
5222
5223OP *
864dbfa3 5224Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 5225{
82092f1d 5226 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 5227 return newUNOP(OP_NULL, 0, o);
748a9306 5228 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 5229}
5230
5231OP *
864dbfa3 5232Perl_newHVREF(pTHX_ OP *o)
79072805 5233{
ed6116ce
LW		 5234 if (o->op_type == OP_PADANY) {
5235 o->op_type = OP_PADHV;
22c35a8c 5236 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 5237 return o;
ed6116ce 5238 }
a1063b2d
RH		 5239 else if ((o->op_type == OP_RV2HV || o->op_type == OP_PADHV)
5240 && ckWARN(WARN_DEPRECATED)) {
5241 Perl_warner(aTHX_ WARN_DEPRECATED,
5242 "Using a hash as a reference is deprecated");
5243 }
79072805
LW		 5244 return newUNOP(OP_RV2HV, 0, scalar(o));
5245}
5246
5247OP *
864dbfa3 5248Perl_oopsCV(pTHX_ OP *o)
79072805 5249{
cea2e8a9 5250 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5251 /* STUB */
5252 return o;
5253}
5254
5255OP *
864dbfa3 5256Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5257{
c07a80fd 5258 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5259}
5260
5261OP *
864dbfa3 5262Perl_newSVREF(pTHX_ OP *o)
79072805 5263{
ed6116ce
LW		 5264 if (o->op_type == OP_PADANY) {
5265 o->op_type = OP_PADSV;
22c35a8c 5266 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5267 return o;
ed6116ce 5268 }
224a4551
MB		 5269 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5270 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5271 return o;
224a4551 5272 }
79072805
LW		 5273 return newUNOP(OP_RV2SV, 0, scalar(o));
5274}
5275
5276/* Check routines. */
5277
5278OP *
cea2e8a9 5279Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5280{
178c6305
CS		 5281 PADOFFSET ix;
5282 SV* name;
5283
5284 name = NEWSV(1106,0);
5285 sv_upgrade(name, SVt_PVNV);
5286 sv_setpvn(name, "&", 1);
5287 SvIVX(name) = -1;
5288 SvNVX(name) = 1;
5dc0d613 5289 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5290 av_store(PL_comppad_name, ix, name);
5291 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5292 SvPADMY_on(cSVOPo->op_sv);
5293 cSVOPo->op_sv = Nullsv;
5294 cSVOPo->op_targ = ix;
5295 return o;
5f05dabc 5296}
5297
5298OP *
cea2e8a9 5299Perl_ck_bitop(pTHX_ OP *o)
55497cff 5300{
3280af22 5301 o->op_private = PL_hints;
5dc0d613 5302 return o;
55497cff 5303}
5304
5305OP *
cea2e8a9 5306Perl_ck_concat(pTHX_ OP *o)
79072805 5307{
11343788
MB		 5308 if (cUNOPo->op_first->op_type == OP_CONCAT)
5309 o->op_flags |= OPf_STACKED;
5310 return o;
79072805
LW		 5311}
5312
5313OP *
cea2e8a9 5314Perl_ck_spair(pTHX_ OP *o)
79072805 5315{
11343788 5316 if (o->op_flags & OPf_KIDS) {
79072805 5317 OP* newop;
a0d0e21e 5318 OP* kid;
5dc0d613
MB		 5319 OPCODE type = o->op_type;
5320 o = modkids(ck_fun(o), type);
11343788 5321 kid = cUNOPo->op_first;
a0d0e21e
LW		 5322 newop = kUNOP->op_first->op_sibling;
5323 if (newop &&
5324 (newop->op_sibling ||
22c35a8c 5325 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5326 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5327 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5328
11343788 5329 return o;
a0d0e21e
LW		 5330 }
5331 op_free(kUNOP->op_first);
5332 kUNOP->op_first = newop;
5333 }
22c35a8c 5334 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5335 return ck_fun(o);
a0d0e21e
LW		 5336}
5337
5338OP *
cea2e8a9 5339Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5340{
11343788 5341 o = ck_fun(o);
5dc0d613 5342 o->op_private = 0;
11343788
MB		 5343 if (o->op_flags & OPf_KIDS) {
5344 OP *kid = cUNOPo->op_first;
01020589
GS		 5345 switch (kid->op_type) {
5346 case OP_ASLICE:
5347 o->op_flags |= OPf_SPECIAL;
5348 /* FALL THROUGH */
5349 case OP_HSLICE:
5dc0d613 5350 o->op_private |= OPpSLICE;
01020589
GS		 5351 break;
5352 case OP_AELEM:
5353 o->op_flags |= OPf_SPECIAL;
5354 /* FALL THROUGH */
5355 case OP_HELEM:
5356 break;
5357 default:
5358 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5359 PL_op_desc[o->op_type]);
01020589 5360 }
93c66552 5361 op_null(kid);
79072805 5362 }
11343788 5363 return o;
79072805
LW		 5364}
5365
5366OP *
cea2e8a9 5367Perl_ck_eof(pTHX_ OP *o)
79072805 5368{
11343788 5369 I32 type = o->op_type;
79072805 5370
11343788
MB		 5371 if (o->op_flags & OPf_KIDS) {
5372 if (cLISTOPo->op_first->op_type == OP_STUB) {
5373 op_free(o);
5374 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5375 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5376 }
11343788 5377 return ck_fun(o);
79072805 5378 }
11343788 5379 return o;
79072805
LW		 5380}
5381
5382OP *
cea2e8a9 5383Perl_ck_eval(pTHX_ OP *o)
79072805 5384{
3280af22 5385 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5386 if (o->op_flags & OPf_KIDS) {
5387 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5388
93a17b20 5389 if (!kid) {
11343788 5390 o->op_flags &= ~OPf_KIDS;
93c66552 5391 op_null(o);
79072805
LW		 5392 }
5393 else if (kid->op_type == OP_LINESEQ) {
5394 LOGOP *enter;
5395
11343788
MB		 5396 kid->op_next = o->op_next;
5397 cUNOPo->op_first = 0;
5398 op_free(o);
79072805 5399
b7dc083c 5400 NewOp(1101, enter, 1, LOGOP);
79072805 5401 enter->op_type = OP_ENTERTRY;
22c35a8c 5402 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5403 enter->op_private = 0;
5404
5405 /* establish postfix order */
5406 enter->op_next = (OP*)enter;
5407
11343788
MB		 5408 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5409 o->op_type = OP_LEAVETRY;
22c35a8c 5410 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5411 enter->op_other = o;
5412 return o;
79072805 5413 }
c7cc6f1c 5414 else
473986ff 5415 scalar((OP*)kid);
79072805
LW		 5416 }
5417 else {
11343788 5418 op_free(o);
54b9620d 5419 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5420 }
3280af22 5421 o->op_targ = (PADOFFSET)PL_hints;
11343788 5422 return o;
79072805
LW		 5423}
5424
5425OP *
d98f61e7
GS		 5426Perl_ck_exit(pTHX_ OP *o)
5427{
5428#ifdef VMS
5429 HV *table = GvHV(PL_hintgv);
5430 if (table) {
5431 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5432 if (svp && *svp && SvTRUE(*svp))
5433 o->op_private |= OPpEXIT_VMSISH;
5434 }
5435#endif
5436 return ck_fun(o);
5437}
5438
5439OP *
cea2e8a9 5440Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5441{
5442 OP *kid;
11343788
MB		 5443 if (o->op_flags & OPf_STACKED) {
5444 o = ck_fun(o);
5445 kid = cUNOPo->op_first->op_sibling;
8990e307 5446 if (kid->op_type == OP_RV2GV)
93c66552 5447 op_null(kid);
79072805 5448 }
463ee0b2 5449 else
11343788
MB		 5450 o = listkids(o);
5451 return o;
79072805
LW		 5452}
5453
5454OP *
cea2e8a9 5455Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5456{
5196be3e
MB		 5457 o = ck_fun(o);
5458 if (o->op_flags & OPf_KIDS) {
5459 OP *kid = cUNOPo->op_first;
afebc493
GS		 5460 if (kid->op_type == OP_ENTERSUB) {
5461 (void) ref(kid, o->op_type);
5462 if (kid->op_type != OP_RV2CV && !PL_error_count)
5463 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5464 PL_op_desc[o->op_type]);
5465 o->op_private |= OPpEXISTS_SUB;
5466 }
5467 else if (kid->op_type == OP_AELEM)
01020589
GS		 5468 o->op_flags |= OPf_SPECIAL;
5469 else if (kid->op_type != OP_HELEM)
5470 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5471 PL_op_desc[o->op_type]);
93c66552 5472 op_null(kid);
5f05dabc 5473 }
5196be3e 5474 return o;
5f05dabc 5475}
5476
22c35a8c 5477#if 0
5f05dabc 5478OP *
cea2e8a9 5479Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5480{
5481 o = fold_constants(o);
5482 if (o->op_type == OP_CONST)
5483 o->op_type = OP_GV;
5484 return o;
5485}
22c35a8c 5486#endif
79072805
LW		 5487
5488OP *
cea2e8a9 5489Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5490{
11343788 5491 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5492
3280af22 5493 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5494 if (kid->op_type == OP_CONST) {
44a8e56a 5495 char *name;
5496 int iscv;
5497 GV *gv;
779c5bc9 5498 SV *kidsv = kid->op_sv;
2d8e6c8d 5499 STRLEN n_a;
44a8e56a 5500
779c5bc9
GS		 5501 /* Is it a constant from cv_const_sv()? */
5502 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5503 SV *rsv = SvRV(kidsv);
5504 int svtype = SvTYPE(rsv);
5505 char *badtype = Nullch;
5506
5507 switch (o->op_type) {
5508 case OP_RV2SV:
5509 if (svtype > SVt_PVMG)
5510 badtype = "a SCALAR";
5511 break;
5512 case OP_RV2AV:
5513 if (svtype != SVt_PVAV)
5514 badtype = "an ARRAY";
5515 break;
5516 case OP_RV2HV:
5517 if (svtype != SVt_PVHV) {
5518 if (svtype == SVt_PVAV) { /* pseudohash? */
5519 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5520 if (ksv && SvROK(*ksv)
5521 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5522 {
5523 break;
5524 }
5525 }
5526 badtype = "a HASH";
5527 }
5528 break;
5529 case OP_RV2CV:
5530 if (svtype != SVt_PVCV)
5531 badtype = "a CODE";
5532 break;
5533 }
5534 if (badtype)
cea2e8a9 5535 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5536 return o;
5537 }
2d8e6c8d 5538 name = SvPV(kidsv, n_a);
3280af22 5539 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5540 char *badthing = Nullch;
5dc0d613 5541 switch (o->op_type) {
44a8e56a 5542 case OP_RV2SV:
5543 badthing = "a SCALAR";
5544 break;
5545 case OP_RV2AV:
5546 badthing = "an ARRAY";
5547 break;
5548 case OP_RV2HV:
5549 badthing = "a HASH";
5550 break;
5551 }
5552 if (badthing)
1c846c1f 5553 Perl_croak(aTHX_
44a8e56a 5554 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5555 name, badthing);
5556 }
93233ece
CS		 5557 /*
5558 * This is a little tricky. We only want to add the symbol if we
5559 * didn't add it in the lexer. Otherwise we get duplicate strict
5560 * warnings. But if we didn't add it in the lexer, we must at
5561 * least pretend like we wanted to add it even if it existed before,
5562 * or we get possible typo warnings. OPpCONST_ENTERED says
5563 * whether the lexer already added THIS instance of this symbol.
5564 */
5196be3e 5565 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5566 do {
44a8e56a 5567 gv = gv_fetchpv(name,
748a9306 5568 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5569 iscv
5570 ? SVt_PVCV
11343788 5571 : o->op_type == OP_RV2SV
a0d0e21e 5572 ? SVt_PV
11343788 5573 : o->op_type == OP_RV2AV
a0d0e21e 5574 ? SVt_PVAV
11343788 5575 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5576 ? SVt_PVHV
5577 : SVt_PVGV);
93233ece
CS		 5578 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5579 if (gv) {
5580 kid->op_type = OP_GV;
5581 SvREFCNT_dec(kid->op_sv);
350de78d 5582#ifdef USE_ITHREADS
638eceb6 5583 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5584 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
63caf608 5585 SvREFCNT_dec(PL_curpad[kPADOP->op_padix]);
743e66e6 5586 GvIN_PAD_on(gv);
350de78d
GS		 5587 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5588#else
93233ece 5589 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5590#endif
23f1ca44 5591 kid->op_private = 0;
76cd736e 5592 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5593 }
79072805 5594 }
11343788 5595 return o;
79072805
LW		 5596}
5597
5598OP *
cea2e8a9 5599Perl_ck_ftst(pTHX_ OP *o)
79072805 5600{
11343788 5601 I32 type = o->op_type;
79072805 5602
d0dca557
JD		 5603 if (o->op_flags & OPf_REF) {
5604 /* nothing */
5605 }
5606 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5607 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5608
5609 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5610 STRLEN n_a;
a0d0e21e 5611 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5612 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5613 op_free(o);
d0dca557 5614 o = newop;
79072805
LW		 5615 }
5616 }
5617 else {
11343788 5618 op_free(o);
79072805 5619 if (type == OP_FTTTY)
d0dca557 5620 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5621 SVt_PVIO));
79072805 5622 else
d0dca557 5623 o = newUNOP(type, 0, newDEFSVOP());
79072805 5624 }
11343788 5625 return o;
79072805
LW		 5626}
5627
5628OP *
cea2e8a9 5629Perl_ck_fun(pTHX_ OP *o)
79072805
LW		 5630{
5631 register OP *kid;
5632 OP **tokid;
5633 OP *sibl;
5634 I32 numargs = 0;
11343788 5635 int type = o->op_type;
22c35a8c 5636 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5637
11343788 5638 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5639 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5640 oa &= ~OA_OPTIONAL;
5641 else
11343788 5642 return no_fh_allowed(o);
79072805
LW		 5643 }
5644
11343788 5645 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5646 STRLEN n_a;
11343788
MB		 5647 tokid = &cLISTOPo->op_first;
5648 kid = cLISTOPo->op_first;
8990e307 5649 if (kid->op_type == OP_PUSHMARK ||
155aba94 5650 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5651 {
79072805
LW		 5652 tokid = &kid->op_sibling;
5653 kid = kid->op_sibling;
5654 }
22c35a8c 5655 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5656 *tokid = kid = newDEFSVOP();
79072805
LW		 5657
5658 while (oa && kid) {
5659 numargs++;
5660 sibl = kid->op_sibling;
5661 switch (oa & 7) {
5662 case OA_SCALAR:
62c18ce2
GS		 5663 /* list seen where single (scalar) arg expected? */
5664 if (numargs == 1 && !(oa >> 4)
5665 && kid->op_type == OP_LIST && type != OP_SCALAR)
5666 {
5667 return too_many_arguments(o,PL_op_desc[type]);
5668 }
79072805
LW		 5669 scalar(kid);
5670 break;
5671 case OA_LIST:
5672 if (oa < 16) {
5673 kid = 0;
5674 continue;
5675 }
5676 else
5677 list(kid);
5678 break;
5679 case OA_AVREF:
936edb8b 5680 if ((type == OP_PUSH || type == OP_UNSHIFT)
f87c3213
JH		 5681 && !kid->op_sibling && ckWARN(WARN_SYNTAX))
5682 Perl_warner(aTHX_ WARN_SYNTAX,
de4864e4 5683 "Useless use of %s with no values",
936edb8b
RH		 5684 PL_op_desc[type]);
5685
79072805 5686 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5687 (kid->op_private & OPpCONST_BARE))
5688 {
2d8e6c8d 5689 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5690 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5691 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5692 if (ckWARN(WARN_DEPRECATED))
5693 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5694 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5695 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5696 op_free(kid);
5697 kid = newop;
5698 kid->op_sibling = sibl;
5699 *tokid = kid;
5700 }
8990e307 5701 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5702 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5703 mod(kid, type);
79072805
LW		 5704 break;
5705 case OA_HVREF:
5706 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5707 (kid->op_private & OPpCONST_BARE))
5708 {
2d8e6c8d 5709 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5710 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5711 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5712 if (ckWARN(WARN_DEPRECATED))
5713 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5714 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5715 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5716 op_free(kid);
5717 kid = newop;
5718 kid->op_sibling = sibl;
5719 *tokid = kid;
5720 }
8990e307 5721 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5722 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5723 mod(kid, type);
79072805
LW		 5724 break;
5725 case OA_CVREF:
5726 {
a0d0e21e 5727 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5728 kid->op_sibling = 0;
5729 linklist(kid);
5730 newop->op_next = newop;
5731 kid = newop;
5732 kid->op_sibling = sibl;
5733 *tokid = kid;
5734 }
5735 break;
5736 case OA_FILEREF:
c340be78 5737 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5738 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5739 (kid->op_private & OPpCONST_BARE))
5740 {
79072805 5741 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5742 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5743 SVt_PVIO) );
79072805
LW		 5744 op_free(kid);
5745 kid = newop;
5746 }
1ea32a52
GS		 5747 else if (kid->op_type == OP_READLINE) {
5748 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5749 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5750 }
79072805 5751 else {
35cd451c 5752 I32 flags = OPf_SPECIAL;
a6c40364 5753 I32 priv = 0;
2c8ac474
GS		 5754 PADOFFSET targ = 0;
5755
35cd451c 5756 /* is this op a FH constructor? */
853846ea 5757 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5758 char *name = Nullch;
5759 STRLEN len;
5760
5761 flags = 0;
5762 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5763 * need to "prove" flag does not mean something
5764 * else already - NI-S 1999/05/07
2c8ac474
GS		 5765 */
5766 priv = OPpDEREF;
5767 if (kid->op_type == OP_PADSV) {
5768 SV **namep = av_fetch(PL_comppad_name,
5769 kid->op_targ, 4);
5770 if (namep && *namep)
5771 name = SvPV(*namep, len);
5772 }
5773 else if (kid->op_type == OP_RV2SV
5774 && kUNOP->op_first->op_type == OP_GV)
5775 {
5776 GV *gv = cGVOPx_gv(kUNOP->op_first);
5777 name = GvNAME(gv);
5778 len = GvNAMELEN(gv);
5779 }
afd1915d
GS		 5780 else if (kid->op_type == OP_AELEM
5781 || kid->op_type == OP_HELEM)
5782 {
5783 name = "__ANONIO__";
5784 len = 10;
5785 mod(kid,type);
5786 }
2c8ac474
GS		 5787 if (name) {
5788 SV *namesv;
5789 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5790 namesv = PL_curpad[targ];
155aba94 5791 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5792 if (*name != '$')
5793 sv_setpvn(namesv, "$", 1);
5794 sv_catpvn(namesv, name, len);
5795 }
853846ea 5796 }
79072805 5797 kid->op_sibling = 0;
35cd451c 5798 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5799 kid->op_targ = targ;
5800 kid->op_private |= priv;
79072805
LW		 5801 }
5802 kid->op_sibling = sibl;
5803 *tokid = kid;
5804 }
5805 scalar(kid);
5806 break;
5807 case OA_SCALARREF:
a0d0e21e 5808 mod(scalar(kid), type);
79072805
LW		 5809 break;
5810 }
5811 oa >>= 4;
5812 tokid = &kid->op_sibling;
5813 kid = kid->op_sibling;
5814 }
11343788 5815 o->op_private |= numargs;
79072805 5816 if (kid)
22c35a8c 5817 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5818 listkids(o);
79072805 5819 }
22c35a8c 5820 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5821 op_free(o);
54b9620d 5822 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5823 }
5824
79072805
LW		 5825 if (oa) {
5826 while (oa & OA_OPTIONAL)
5827 oa >>= 4;
5828 if (oa && oa != OA_LIST)
22c35a8c 5829 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5830 }
11343788 5831 return o;
79072805
LW		 5832}
5833
5834OP *
cea2e8a9 5835Perl_ck_glob(pTHX_ OP *o)
79072805 5836{
fb73857a 5837 GV *gv;
5838
649da076 5839 o = ck_fun(o);
1f2bfc8a 5840 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5841 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5842
5843 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5844 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5845
52bb0670 5846#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5847 /* XXX this can be tightened up and made more failsafe. */
5848 if (!gv) {
7d3fb230 5849 GV *glob_gv;
72b16652 5850 ENTER;
7d3fb230
BS		 5851 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpvn("File::Glob", 10), Nullsv,
5852 Nullsv, Nullsv);
72b16652 5853 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
7d3fb230
BS		 5854 glob_gv = gv_fetchpv("File::Glob::csh_glob", FALSE, SVt_PVCV);
5855 GvCV(gv) = GvCV(glob_gv);
445266f0 5856 SvREFCNT_inc((SV*)GvCV(gv));
7d3fb230 5857 GvIMPORTED_CV_on(gv);
72b16652
GS		 5858 LEAVE;
5859 }
52bb0670 5860#endif /* PERL_EXTERNAL_GLOB */
72b16652 5861
b1cb66bf 5862 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5863 append_elem(OP_GLOB, o,
80252599 5864 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5865 o->op_type = OP_LIST;
22c35a8c 5866 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5867 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5868 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5869 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5870 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5871 scalar(newUNOP(OP_RV2CV, 0,
5872 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5873 o = newUNOP(OP_NULL, 0, ck_subr(o));
5874 o->op_targ = OP_GLOB; /* hint at what it used to be */
5875 return o;
b1cb66bf 5876 }
5877 gv = newGVgen("main");
a0d0e21e 5878 gv_IOadd(gv);
11343788
MB		 5879 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5880 scalarkids(o);
649da076 5881 return o;
79072805
LW		 5882}
5883
5884OP *
cea2e8a9 5885Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5886{
5887 LOGOP *gwop;
5888 OP *kid;
11343788 5889 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5890
22c35a8c 5891 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5892 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5893
11343788 5894 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5895 OP* k;
11343788
MB		 5896 o = ck_sort(o);
5897 kid = cLISTOPo->op_first->op_sibling;
5898 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5899 kid = k;
5900 }
5901 kid->op_next = (OP*)gwop;
11343788 5902 o->op_flags &= ~OPf_STACKED;
93a17b20 5903 }
11343788 5904 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5905 if (type == OP_MAPWHILE)
5906 list(kid);
5907 else
5908 scalar(kid);
11343788 5909 o = ck_fun(o);
3280af22 5910 if (PL_error_count)
11343788 5911 return o;
aeea060c 5912 kid = cLISTOPo->op_first->op_sibling;
79072805 5913 if (kid->op_type != OP_NULL)
cea2e8a9 5914 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5915 kid = kUNOP->op_first;
5916
a0d0e21e 5917 gwop->op_type = type;
22c35a8c 5918 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5919 gwop->op_first = listkids(o);
79072805
LW		 5920 gwop->op_flags |= OPf_KIDS;
5921 gwop->op_private = 1;
5922 gwop->op_other = LINKLIST(kid);
a0d0e21e 5923 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5924 kid->op_next = (OP*)gwop;
5925
11343788 5926 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5927 if (!kid || !kid->op_sibling)
22c35a8c 5928 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5929 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5930 mod(kid, OP_GREPSTART);
5931
79072805
LW		 5932 return (OP*)gwop;
5933}
5934
5935OP *
cea2e8a9 5936Perl_ck_index(pTHX_ OP *o)
79072805 5937{
11343788
MB		 5938 if (o->op_flags & OPf_KIDS) {
5939 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5940 if (kid)
5941 kid = kid->op_sibling; /* get past "big" */
79072805 5942 if (kid && kid->op_type == OP_CONST)
2779dcf1 5943 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5944 }
11343788 5945 return ck_fun(o);
79072805
LW		 5946}
5947
5948OP *
cea2e8a9 5949Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5950{
5951 /* XXX length optimization goes here */
11343788 5952 return ck_fun(o);
79072805
LW		 5953}
5954
5955OP *
cea2e8a9 5956Perl_ck_lfun(pTHX_ OP *o)
79072805 5957{
5dc0d613
MB		 5958 OPCODE type = o->op_type;
5959 return modkids(ck_fun(o), type);
79072805
LW		 5960}
5961
5962OP *
cea2e8a9 5963Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5964{
d0334bed
GS		 5965 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5966 switch (cUNOPo->op_first->op_type) {
5967 case OP_RV2AV:
a8739d98
JH		 5968 /* This is needed for
5969 if (defined %stash::)
5970 to work. Do not break Tk.
5971 */
1c846c1f 5972 break; /* Globals via GV can be undef */
d0334bed
GS		 5973 case OP_PADAV:
5974 case OP_AASSIGN: /* Is this a good idea? */
5975 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5976 "defined(@array) is deprecated");
d0334bed 5977 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5978 "\t(Maybe you should just omit the defined()?)\n");
69794302 5979 break;
d0334bed 5980 case OP_RV2HV:
a8739d98
JH		 5981 /* This is needed for
5982 if (defined %stash::)
5983 to work. Do not break Tk.
5984 */
1c846c1f 5985 break; /* Globals via GV can be undef */
d0334bed
GS		 5986 case OP_PADHV:
5987 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5988 "defined(%%hash) is deprecated");
d0334bed 5989 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5990 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5991 break;
5992 default:
5993 /* no warning */
5994 break;
5995 }
69794302
MJD		 5996 }
5997 return ck_rfun(o);
5998}
5999
6000OP *
cea2e8a9 6001Perl_ck_rfun(pTHX_ OP *o)
8990e307 6002{
5dc0d613
MB		 6003 OPCODE type = o->op_type;
6004 return refkids(ck_fun(o), type);
8990e307
LW		 6005}
6006
6007OP *
cea2e8a9 6008Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 6009{
6010 register OP *kid;
aeea060c 6011
11343788 6012 kid = cLISTOPo->op_first;
79072805 6013 if (!kid) {
11343788
MB		 6014 o = force_list(o);
6015 kid = cLISTOPo->op_first;
79072805
LW		 6016 }
6017 if (kid->op_type == OP_PUSHMARK)
6018 kid = kid->op_sibling;
11343788 6019 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 6020 kid = kid->op_sibling;
6021 else if (kid && !kid->op_sibling) { /* print HANDLE; */
6022 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 6023 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 6024 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 6025 cLISTOPo->op_first->op_sibling = kid;
6026 cLISTOPo->op_last = kid;
79072805
LW		 6027 kid = kid->op_sibling;
6028 }
6029 }
6030
6031 if (!kid)
54b9620d 6032 append_elem(o->op_type, o, newDEFSVOP());
79072805 6033
2de3dbcc 6034 return listkids(o);
bbce6d69 6035}
6036
6037OP *
b162f9ea
IZ		 6038Perl_ck_sassign(pTHX_ OP *o)
6039{
6040 OP *kid = cLISTOPo->op_first;
6041 /* has a disposable target? */
6042 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 6043 && !(kid->op_flags & OPf_STACKED)
6044 /* Cannot steal the second time! */
6045 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 6046 {
6047 OP *kkid = kid->op_sibling;
6048
6049 /* Can just relocate the target. */
2c2d71f5
JH		 6050 if (kkid && kkid->op_type == OP_PADSV
6051 && !(kkid->op_private & OPpLVAL_INTRO))
6052 {
b162f9ea 6053 kid->op_targ = kkid->op_targ;
743e66e6 6054 kkid->op_targ = 0;
b162f9ea
IZ		 6055 /* Now we do not need PADSV and SASSIGN. */
6056 kid->op_sibling = o->op_sibling; /* NULL */
6057 cLISTOPo->op_first = NULL;
6058 op_free(o);
6059 op_free(kkid);
6060 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
6061 return kid;
6062 }
6063 }
6064 return o;
6065}
6066
6067OP *
cea2e8a9 6068Perl_ck_match(pTHX_ OP *o)
79072805 6069{
5dc0d613 6070 o->op_private |= OPpRUNTIME;
11343788 6071 return o;
79072805
LW		 6072}
6073
6074OP *
f5d5a27c
CS		 6075Perl_ck_method(pTHX_ OP *o)
6076{
6077 OP *kid = cUNOPo->op_first;
6078 if (kid->op_type == OP_CONST) {
6079 SV* sv = kSVOP->op_sv;
6080 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
6081 OP *cmop;
1c846c1f
NIS		 6082 if (!SvREADONLY(sv) || !SvFAKE(sv)) {
6083 sv = newSVpvn_share(SvPVX(sv), SvCUR(sv), 0);
6084 }
6085 else {
6086 kSVOP->op_sv = Nullsv;
6087 }
f5d5a27c 6088 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
f5d5a27c
CS		 6089 op_free(o);
6090 return cmop;
6091 }
6092 }
6093 return o;
6094}
6095
6096OP *
cea2e8a9 6097Perl_ck_null(pTHX_ OP *o)
79072805 6098{
11343788 6099 return o;
79072805
LW		 6100}
6101
6102OP *
16fe6d59
GS		 6103Perl_ck_open(pTHX_ OP *o)
6104{
6105 HV *table = GvHV(PL_hintgv);
6106 if (table) {
6107 SV **svp;
6108 I32 mode;
6109 svp = hv_fetch(table, "open_IN", 7, FALSE);
6110 if (svp && *svp) {
6111 mode = mode_from_discipline(*svp);
6112 if (mode & O_BINARY)
6113 o->op_private |= OPpOPEN_IN_RAW;
6114 else if (mode & O_TEXT)
6115 o->op_private |= OPpOPEN_IN_CRLF;
6116 }
6117
6118 svp = hv_fetch(table, "open_OUT", 8, FALSE);
6119 if (svp && *svp) {
6120 mode = mode_from_discipline(*svp);
6121 if (mode & O_BINARY)
6122 o->op_private |= OPpOPEN_OUT_RAW;
6123 else if (mode & O_TEXT)
6124 o->op_private |= OPpOPEN_OUT_CRLF;
6125 }
6126 }
6127 if (o->op_type == OP_BACKTICK)
6128 return o;
6129 return ck_fun(o);
6130}
6131
6132OP *
cea2e8a9 6133Perl_ck_repeat(pTHX_ OP *o)
79072805 6134{
11343788
MB		 6135 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
6136 o->op_private |= OPpREPEAT_DOLIST;
6137 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 6138 }
6139 else
11343788
MB		 6140 scalar(o);
6141 return o;
79072805
LW		 6142}
6143
6144OP *
cea2e8a9 6145Perl_ck_require(pTHX_ OP *o)
8990e307 6146{
ec4ab249
GA		 6147 GV* gv;
6148
11343788
MB		 6149 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
6150 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 6151
6152 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 6153 char *s;
a0d0e21e
LW		 6154 for (s = SvPVX(kid->op_sv); *s; s++) {
6155 if (*s == ':' && s[1] == ':') {
6156 *s = '/';
1aef975c 6157 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 6158 --SvCUR(kid->op_sv);
6159 }
8990e307 6160 }
ce3b816e
GS		 6161 if (SvREADONLY(kid->op_sv)) {
6162 SvREADONLY_off(kid->op_sv);
6163 sv_catpvn(kid->op_sv, ".pm", 3);
6164 SvREADONLY_on(kid->op_sv);
6165 }
6166 else
6167 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 6168 }
6169 }
ec4ab249
GA		 6170
6171 /* handle override, if any */
6172 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
6173 if (!(gv && GvIMPORTED_CV(gv)))
6174 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
6175
6176 if (gv && GvIMPORTED_CV(gv)) {
6177 OP *kid = cUNOPo->op_first;
6178 cUNOPo->op_first = 0;
6179 op_free(o);
6180 return ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
6181 append_elem(OP_LIST, kid,
6182 scalar(newUNOP(OP_RV2CV, 0,
6183 newGVOP(OP_GV, 0,
6184 gv))))));
6185 }
6186
11343788 6187 return ck_fun(o);
8990e307
LW		 6188}
6189
78f9721b
SM		 6190OP *
6191Perl_ck_return(pTHX_ OP *o)
6192{
6193 OP *kid;
6194 if (CvLVALUE(PL_compcv)) {
6195 for (kid = cLISTOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
6196 mod(kid, OP_LEAVESUBLV);
6197 }
6198 return o;
6199}
6200
22c35a8c 6201#if 0
8990e307 6202OP *
cea2e8a9 6203Perl_ck_retarget(pTHX_ OP *o)
79072805 6204{
cea2e8a9 6205 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 6206 /* STUB */
11343788 6207 return o;
79072805 6208}
22c35a8c 6209#endif
79072805
LW		 6210
6211OP *
cea2e8a9 6212Perl_ck_select(pTHX_ OP *o)
79072805 6213{
c07a80fd 6214 OP* kid;
11343788
MB		 6215 if (o->op_flags & OPf_KIDS) {
6216 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 6217 if (kid && kid->op_sibling) {
11343788 6218 o->op_type = OP_SSELECT;
22c35a8c 6219 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 6220 o = ck_fun(o);
6221 return fold_constants(o);
79072805
LW		 6222 }
6223 }
11343788
MB		 6224 o = ck_fun(o);
6225 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 6226 if (kid && kid->op_type == OP_RV2GV)
6227 kid->op_private &= ~HINT_STRICT_REFS;
11343788 6228 return o;
79072805
LW		 6229}
6230
6231OP *
cea2e8a9 6232Perl_ck_shift(pTHX_ OP *o)
79072805 6233{
11343788 6234 I32 type = o->op_type;
79072805 6235
11343788 6236 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 6237 OP *argop;
6238
11343788 6239 op_free(o);
6d4ff0d2 6240#ifdef USE_THREADS
533c011a 6241 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 6242 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 6243 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 6244 }
6245 else {
6246 argop = newUNOP(OP_RV2AV, 0,
6247 scalar(newGVOP(OP_GV, 0,
6248 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6249 }
6250#else
6251 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 6252 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6253 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6254#endif /* USE_THREADS */
6255 return newUNOP(type, 0, scalar(argop));
79072805 6256 }
11343788 6257 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6258}
6259
6260OP *
cea2e8a9 6261Perl_ck_sort(pTHX_ OP *o)
79072805 6262{
8e3f9bdf 6263 OP *firstkid;
bbce6d69 6264
9ea6e965 6265 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6266 simplify_sort(o);
8e3f9bdf
GS		 6267 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6268 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
9c5ffd7c 6269 OP *k = NULL;
8e3f9bdf 6270 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6271
463ee0b2 6272 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6273 linklist(kid);
463ee0b2
LW		 6274 if (kid->op_type == OP_SCOPE) {
6275 k = kid->op_next;
6276 kid->op_next = 0;
79072805 6277 }
463ee0b2 6278 else if (kid->op_type == OP_LEAVE) {
11343788 6279 if (o->op_type == OP_SORT) {
93c66552 6280 op_null(kid); /* wipe out leave */
748a9306 6281 kid->op_next = kid;
463ee0b2 6282
748a9306
LW		 6283 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6284 if (k->op_next == kid)
6285 k->op_next = 0;
71a29c3c
GS		 6286 /* don't descend into loops */
6287 else if (k->op_type == OP_ENTERLOOP
6288 || k->op_type == OP_ENTERITER)
6289 {
6290 k = cLOOPx(k)->op_lastop;
6291 }
748a9306 6292 }
463ee0b2 6293 }
748a9306
LW		 6294 else
6295 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6296 k = kLISTOP->op_first;
463ee0b2 6297 }
a0d0e21e
LW		 6298 peep(k);
6299
8e3f9bdf
GS		 6300 kid = firstkid;
6301 if (o->op_type == OP_SORT) {
6302 /* provide scalar context for comparison function/block */
6303 kid = scalar(kid);
a0d0e21e 6304 kid->op_next = kid;
8e3f9bdf 6305 }
a0d0e21e
LW		 6306 else
6307 kid->op_next = k;
11343788 6308 o->op_flags |= OPf_SPECIAL;
79072805 6309 }
c6e96bcb 6310 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
93c66552 6311 op_null(firstkid);
8e3f9bdf
GS		 6312
6313 firstkid = firstkid->op_sibling;
79072805 6314 }
bbce6d69 6315
8e3f9bdf
GS		 6316 /* provide list context for arguments */
6317 if (o->op_type == OP_SORT)
6318 list(firstkid);
6319
11343788 6320 return o;
79072805 6321}
bda4119b
GS		 6322
6323STATIC void
cea2e8a9 6324S_simplify_sort(pTHX_ OP *o)
9c007264
JH		 6325{
6326 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6327 OP *k;
6328 int reversed;
350de78d 6329 GV *gv;
9c007264
JH		 6330 if (!(o->op_flags & OPf_STACKED))
6331 return;
1c846c1f
NIS		 6332 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6333 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6334 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6335 if (kid->op_type != OP_SCOPE)
6336 return;
6337 kid = kLISTOP->op_last; /* get past scope */
6338 switch(kid->op_type) {
6339 case OP_NCMP:
6340 case OP_I_NCMP:
6341 case OP_SCMP:
6342 break;
6343 default:
6344 return;
6345 }
6346 k = kid; /* remember this node*/
6347 if (kBINOP->op_first->op_type != OP_RV2SV)
6348 return;
6349 kid = kBINOP->op_first; /* get past cmp */
6350 if (kUNOP->op_first->op_type != OP_GV)
6351 return;
6352 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6353 gv = kGVOP_gv;
350de78d 6354 if (GvSTASH(gv) != PL_curstash)
9c007264 6355 return;
350de78d 6356 if (strEQ(GvNAME(gv), "a"))
9c007264 6357 reversed = 0;
0f79a09d 6358 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6359 reversed = 1;
6360 else
6361 return;
6362 kid = k; /* back to cmp */
6363 if (kBINOP->op_last->op_type != OP_RV2SV)
6364 return;
6365 kid = kBINOP->op_last; /* down to 2nd arg */
6366 if (kUNOP->op_first->op_type != OP_GV)
6367 return;
6368 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6369 gv = kGVOP_gv;
350de78d 6370 if (GvSTASH(gv) != PL_curstash
9c007264 6371 || ( reversed
350de78d
GS		 6372 ? strNE(GvNAME(gv), "a")
6373 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6374 return;
6375 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6376 if (reversed)
6377 o->op_private |= OPpSORT_REVERSE;
6378 if (k->op_type == OP_NCMP)
6379 o->op_private |= OPpSORT_NUMERIC;
6380 if (k->op_type == OP_I_NCMP)
6381 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6382 kid = cLISTOPo->op_first->op_sibling;
6383 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6384 op_free(kid); /* then delete it */
9c007264 6385}
79072805
LW		 6386
6387OP *
cea2e8a9 6388Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6389{
6390 register OP *kid;
aeea060c 6391
11343788
MB		 6392 if (o->op_flags & OPf_STACKED)
6393 return no_fh_allowed(o);
79072805 6394
11343788 6395 kid = cLISTOPo->op_first;
8990e307 6396 if (kid->op_type != OP_NULL)
cea2e8a9 6397 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6398 kid = kid->op_sibling;
11343788
MB		 6399 op_free(cLISTOPo->op_first);
6400 cLISTOPo->op_first = kid;
85e6fe83 6401 if (!kid) {
79cb57f6 6402 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6403 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6404 }
79072805 6405
de4bf5b3 6406 if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) {
79072805 6407 OP *sibl = kid->op_sibling;
463ee0b2 6408 kid->op_sibling = 0;
79072805 6409 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6410 if (cLISTOPo->op_first == cLISTOPo->op_last)
6411 cLISTOPo->op_last = kid;
6412 cLISTOPo->op_first = kid;
79072805
LW		 6413 kid->op_sibling = sibl;
6414 }
6415
6416 kid->op_type = OP_PUSHRE;
22c35a8c 6417 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6418 scalar(kid);
6419
6420 if (!kid->op_sibling)
54b9620d 6421 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6422
6423 kid = kid->op_sibling;
6424 scalar(kid);
6425
6426 if (!kid->op_sibling)
11343788 6427 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6428
6429 kid = kid->op_sibling;
6430 scalar(kid);
6431
6432 if (kid->op_sibling)
22c35a8c 6433 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6434
11343788 6435 return o;
79072805
LW		 6436}
6437
6438OP *
1c846c1f 6439Perl_ck_join(pTHX_ OP *o)
eb6e2d6f
GS		 6440{
6441 if (ckWARN(WARN_SYNTAX)) {
6442 OP *kid = cLISTOPo->op_first->op_sibling;
6443 if (kid && kid->op_type == OP_MATCH) {
6444 char *pmstr = "STRING";
aaa362c4
RS		 6445 if (PM_GETRE(kPMOP))
6446 pmstr = PM_GETRE(kPMOP)->precomp;
eb6e2d6f
GS		 6447 Perl_warner(aTHX_ WARN_SYNTAX,
6448 "/%s/ should probably be written as \"%s\"",
6449 pmstr, pmstr);
6450 }
6451 }
6452 return ck_fun(o);
6453}
6454
6455OP *
cea2e8a9 6456Perl_ck_subr(pTHX_ OP *o)
79072805 6457{
11343788
MB		 6458 OP *prev = ((cUNOPo->op_first->op_sibling)
6459 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6460 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6461 OP *cvop;
6462 char *proto = 0;
6463 CV *cv = 0;
46fc3d4c 6464 GV *namegv = 0;
4633a7c4
LW		 6465 int optional = 0;
6466 I32 arg = 0;
2d8e6c8d 6467 STRLEN n_a;
4633a7c4 6468
d3011074 6469 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6470 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6471 if (cvop->op_type == OP_RV2CV) {
6472 SVOP* tmpop;
11343788 6473 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
93c66552 6474 op_null(cvop); /* disable rv2cv */
4633a7c4 6475 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6476 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6477 GV *gv = cGVOPx_gv(tmpop);
350de78d 6478 cv = GvCVu(gv);
76cd736e
GS		 6479 if (!cv)
6480 tmpop->op_private |= OPpEARLY_CV;
6481 else if (SvPOK(cv)) {
350de78d 6482 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6483 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6484 }
4633a7c4
LW		 6485 }
6486 }
f5d5a27c 6487 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6488 if (o2->op_type == OP_CONST)
6489 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6490 else if (o2->op_type == OP_LIST) {
6491 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6492 if (o && o->op_type == OP_CONST)
6493 o->op_private &= ~OPpCONST_STRICT;
6494 }
7a52d87a 6495 }
3280af22
NIS		 6496 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6497 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6498 o->op_private |= OPpENTERSUB_DB;
6499 while (o2 != cvop) {
4633a7c4
LW		 6500 if (proto) {
6501 switch (*proto) {
6502 case '\0':
5dc0d613 6503 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6504 case ';':
6505 optional = 1;
6506 proto++;
6507 continue;
6508 case '$':
6509 proto++;
6510 arg++;
11343788 6511 scalar(o2);
4633a7c4
LW		 6512 break;
6513 case '%':
6514 case '@':
11343788 6515 list(o2);
4633a7c4
LW		 6516 arg++;
6517 break;
6518 case '&':
6519 proto++;
6520 arg++;
11343788 6521 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6522 bad_type(arg,
6523 arg == 1 ? "block or sub {}" : "sub {}",
6524 gv_ename(namegv), o2);
4633a7c4
LW		 6525 break;
6526 case '*':
2ba6ecf4 6527 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6528 proto++;
6529 arg++;
11343788 6530 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6531 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6532 else if (o2->op_type == OP_CONST)
6533 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6534 else if (o2->op_type == OP_ENTERSUB) {
6535 /* accidental subroutine, revert to bareword */
6536 OP *gvop = ((UNOP*)o2)->op_first;
6537 if (gvop && gvop->op_type == OP_NULL) {
6538 gvop = ((UNOP*)gvop)->op_first;
6539 if (gvop) {
6540 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6541 ;
6542 if (gvop &&
6543 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6544 (gvop = ((UNOP*)gvop)->op_first) &&
6545 gvop->op_type == OP_GV)
6546 {
638eceb6 6547 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6548 OP *sibling = o2->op_sibling;
2692f720 6549 SV *n = newSVpvn("",0);
9675f7ac 6550 op_free(o2);
2692f720
GS		 6551 gv_fullname3(n, gv, "");
6552 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6553 sv_chop(n, SvPVX(n)+6);
6554 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6555 prev->op_sibling = o2;
6556 o2->op_sibling = sibling;
6557 }
6558 }
6559 }
6560 }
2ba6ecf4
GS		 6561 scalar(o2);
6562 break;
4633a7c4
LW		 6563 case '\\':
6564 proto++;
6565 arg++;
6566 switch (*proto++) {
6567 case '*':
11343788 6568 if (o2->op_type != OP_RV2GV)
5dc0d613 6569 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6570 goto wrapref;
6571 case '&':
75fc29ea
GS		 6572 if (o2->op_type != OP_ENTERSUB)
6573 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6574 goto wrapref;
6575 case '$':
386acf99
GS		 6576 if (o2->op_type != OP_RV2SV
6577 && o2->op_type != OP_PADSV
1c01eb51
GS		 6578 && o2->op_type != OP_HELEM
6579 && o2->op_type != OP_AELEM
386acf99
GS		 6580 && o2->op_type != OP_THREADSV)
6581 {
5dc0d613 6582 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6583 }
4633a7c4
LW		 6584 goto wrapref;
6585 case '@':
11343788 6586 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6587 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6588 goto wrapref;
6589 case '%':
11343788 6590 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6591 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6592 wrapref:
6593 {
11343788 6594 OP* kid = o2;
6fa846a0 6595 OP* sib = kid->op_sibling;
4633a7c4 6596 kid->op_sibling = 0;
6fa846a0
GS		 6597 o2 = newUNOP(OP_REFGEN, 0, kid);
6598 o2->op_sibling = sib;
e858de61 6599 prev->op_sibling = o2;
4633a7c4
LW		 6600 }
6601 break;
6602 default: goto oops;
6603 }
6604 break;
b1cb66bf 6605 case ' ':
6606 proto++;
6607 continue;
4633a7c4
LW		 6608 default:
6609 oops:
cea2e8a9 6610 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6611 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6612 }
6613 }
6614 else
11343788
MB		 6615 list(o2);
6616 mod(o2, OP_ENTERSUB);
6617 prev = o2;
6618 o2 = o2->op_sibling;
4633a7c4 6619 }
fb73857a 6620 if (proto && !optional &&
6621 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6622 return too_few_arguments(o, gv_ename(namegv));
11343788 6623 return o;
79072805
LW		 6624}
6625
6626OP *
cea2e8a9 6627Perl_ck_svconst(pTHX_ OP *o)
8990e307 6628{
11343788
MB		 6629 SvREADONLY_on(cSVOPo->op_sv);
6630 return o;
8990e307
LW		 6631}
6632
6633OP *
cea2e8a9 6634Perl_ck_trunc(pTHX_ OP *o)
79072805 6635{
11343788
MB		 6636 if (o->op_flags & OPf_KIDS) {
6637 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6638
a0d0e21e
LW		 6639 if (kid->op_type == OP_NULL)
6640 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6641 if (kid && kid->op_type == OP_CONST &&
6642 (kid->op_private & OPpCONST_BARE))
6643 {
11343788 6644 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6645 kid->op_private &= ~OPpCONST_STRICT;
6646 }
79072805 6647 }
11343788 6648 return ck_fun(o);
79072805
LW		 6649}
6650
35fba0d9
RG		 6651OP *
6652Perl_ck_substr(pTHX_ OP *o)
6653{
6654 o = ck_fun(o);
6655 if ((o->op_flags & OPf_KIDS) && o->op_private == 4) {
6656 OP *kid = cLISTOPo->op_first;
6657
6658 if (kid->op_type == OP_NULL)
6659 kid = kid->op_sibling;
6660 if (kid)
6661 kid->op_flags |= OPf_MOD;
6662
6663 }
6664 return o;
6665}
6666
463ee0b2
LW		 6667/* A peephole optimizer. We visit the ops in the order they're to execute. */
6668
79072805 6669void
864dbfa3 6670Perl_peep(pTHX_ register OP *o)
79072805
LW		 6671{
6672 register OP* oldop = 0;
2d8e6c8d
GS		 6673 STRLEN n_a;
6674
a0d0e21e 6675 if (!o || o->op_seq)
79072805 6676 return;
a0d0e21e 6677 ENTER;
462e5cf6 6678 SAVEOP();
7766f137 6679 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6680 for (; o; o = o->op_next) {
6681 if (o->op_seq)
6682 break;
3280af22
NIS		 6683 if (!PL_op_seqmax)
6684 PL_op_seqmax++;
533c011a 6685 PL_op = o;
a0d0e21e 6686 switch (o->op_type) {
acb36ea4 6687 case OP_SETSTATE:
a0d0e21e
LW		 6688 case OP_NEXTSTATE:
6689 case OP_DBSTATE:
3280af22
NIS		 6690 PL_curcop = ((COP*)o); /* for warnings */
6691 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 6692 break;
6693
a0d0e21e 6694 case OP_CONST:
7a52d87a
GS		 6695 if (cSVOPo->op_private & OPpCONST_STRICT)
6696 no_bareword_allowed(o);
7766f137
GS		 6697#ifdef USE_ITHREADS
6698 /* Relocate sv to the pad for thread safety.
6699 * Despite being a "constant", the SV is written to,
6700 * for reference counts, sv_upgrade() etc. */
6701 if (cSVOP->op_sv) {
6702 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6703 if (SvPADTMP(cSVOPo->op_sv)) {
6704 /* If op_sv is already a PADTMP then it is being used by
9a049f1c 6705 * some pad, so make a copy. */
6a7129a1
GS		 6706 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6707 SvREADONLY_on(PL_curpad[ix]);
6708 SvREFCNT_dec(cSVOPo->op_sv);
6709 }
6710 else {
6711 SvREFCNT_dec(PL_curpad[ix]);
6712 SvPADTMP_on(cSVOPo->op_sv);
6713 PL_curpad[ix] = cSVOPo->op_sv;
9a049f1c
JT		 6714 /* XXX I don't know how this isn't readonly already. */
6715 SvREADONLY_on(PL_curpad[ix]);
6a7129a1 6716 }
7766f137
GS		 6717 cSVOPo->op_sv = Nullsv;
6718 o->op_targ = ix;
6719 }
6720#endif
07447971
GS		 6721 o->op_seq = PL_op_seqmax++;
6722 break;
6723
ed7ab888 6724 case OP_CONCAT:
b162f9ea
IZ		 6725 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6726 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6727 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6728 goto ignore_optimization;
cd06dffe 6729 else {
07447971 6730 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6731 o->op_targ = o->op_next->op_targ;
743e66e6 6732 o->op_next->op_targ = 0;
2c2d71f5 6733 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6734 }
6735 }
93c66552 6736 op_null(o->op_next);
b162f9ea
IZ		 6737 }
6738 ignore_optimization:
3280af22 6739 o->op_seq = PL_op_seqmax++;
a0d0e21e 6740 break;
8990e307 6741 case OP_STUB:
54310121 6742 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6743 o->op_seq = PL_op_seqmax++;
54310121 6744 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6745 }
748a9306 6746 goto nothin;
79072805 6747 case OP_NULL:
acb36ea4
GS		 6748 if (o->op_targ == OP_NEXTSTATE
6749 || o->op_targ == OP_DBSTATE
6750 || o->op_targ == OP_SETSTATE)
6751 {
3280af22 6752 PL_curcop = ((COP*)o);
acb36ea4 6753 }
748a9306 6754 goto nothin;
79072805 6755 case OP_SCALAR:
93a17b20 6756 case OP_LINESEQ:
463ee0b2 6757 case OP_SCOPE:
748a9306 6758 nothin:
a0d0e21e
LW		 6759 if (oldop && o->op_next) {
6760 oldop->op_next = o->op_next;
79072805
LW		 6761 continue;
6762 }
3280af22 6763 o->op_seq = PL_op_seqmax++;
79072805
LW		 6764 break;
6765
6766 case OP_GV:
a0d0e21e 6767 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6768 if (!(o->op_next->op_private & OPpDEREF)) {
93c66552 6769 op_null(o->op_next);
64aac5a9
GS		 6770 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6771 | OPpOUR_INTRO);
a0d0e21e
LW		 6772 o->op_next = o->op_next->op_next;
6773 o->op_type = OP_GVSV;
22c35a8c 6774 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6775 }
6776 }
a0d0e21e
LW		 6777 else if (o->op_next->op_type == OP_RV2AV) {
6778 OP* pop = o->op_next->op_next;
6779 IV i;
8990e307 6780 if (pop->op_type == OP_CONST &&
533c011a 6781 (PL_op = pop->op_next) &&
8990e307 6782 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6783 !(pop->op_next->op_private &
78f9721b 6784 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF|OPpMAYBE_LVSUB)) &&
b0840a2a 6785 (i = SvIV(((SVOP*)pop)->op_sv) - PL_curcop->cop_arybase)
a0d0e21e 6786 <= 255 &&
8990e307
LW		 6787 i >= 0)
6788 {
350de78d 6789 GV *gv;
93c66552
DM		 6790 op_null(o->op_next);
6791 op_null(pop->op_next);
6792 op_null(pop);
a0d0e21e
LW		 6793 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6794 o->op_next = pop->op_next->op_next;
6795 o->op_type = OP_AELEMFAST;
22c35a8c 6796 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6797 o->op_private = (U8)i;
638eceb6 6798 gv = cGVOPo_gv;
350de78d 6799 GvAVn(gv);
8990e307 6800 }
79072805 6801 }
e476b1b5 6802 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6803 GV *gv = cGVOPo_gv;
76cd736e
GS		 6804 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6805 /* XXX could check prototype here instead of just carping */
6806 SV *sv = sv_newmortal();
6807 gv_efullname3(sv, gv, Nullch);
e476b1b5 6808 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6809 "%s() called too early to check prototype",
6810 SvPV_nolen(sv));
6811 }
6812 }
6813
3280af22 6814 o->op_seq = PL_op_seqmax++;
79072805
LW		 6815 break;
6816
a0d0e21e 6817 case OP_MAPWHILE:
79072805
LW		 6818 case OP_GREPWHILE:
6819 case OP_AND:
6820 case OP_OR:
2c2d71f5
JH		 6821 case OP_ANDASSIGN:
6822 case OP_ORASSIGN:
1a67a97c
SM		 6823 case OP_COND_EXPR:
6824 case OP_RANGE:
3280af22 6825 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6826 while (cLOGOP->op_other->op_type == OP_NULL)
6827 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6828 peep(cLOGOP->op_other);
6829 break;
6830
79072805 6831 case OP_ENTERLOOP:
9c2ca71a 6832 case OP_ENTERITER:
3280af22 6833 o->op_seq = PL_op_seqmax++;
58cccf98
SM		 6834 while (cLOOP->op_redoop->op_type == OP_NULL)
6835 cLOOP->op_redoop = cLOOP->op_redoop->op_next;
79072805 6836 peep(cLOOP->op_redoop);
58cccf98
SM		 6837 while (cLOOP->op_nextop->op_type == OP_NULL)
6838 cLOOP->op_nextop = cLOOP->op_nextop->op_next;
79072805 6839 peep(cLOOP->op_nextop);
58cccf98
SM		 6840 while (cLOOP->op_lastop->op_type == OP_NULL)
6841 cLOOP->op_lastop = cLOOP->op_lastop->op_next;
79072805
LW		 6842 peep(cLOOP->op_lastop);
6843 break;
6844
8782bef2 6845 case OP_QR:
79072805
LW		 6846 case OP_MATCH:
6847 case OP_SUBST:
3280af22 6848 o->op_seq = PL_op_seqmax++;
9041c2e3 6849 while (cPMOP->op_pmreplstart &&
58cccf98
SM		 6850 cPMOP->op_pmreplstart->op_type == OP_NULL)
6851 cPMOP->op_pmreplstart = cPMOP->op_pmreplstart->op_next;
a0d0e21e 6852 peep(cPMOP->op_pmreplstart);
79072805
LW		 6853 break;
6854
a0d0e21e 6855 case OP_EXEC:
3280af22 6856 o->op_seq = PL_op_seqmax++;
1c846c1f 6857 if (ckWARN(WARN_SYNTAX) && o->op_next
599cee73 6858 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6859 if (o->op_next->op_sibling &&
20408e3c
GS		 6860 o->op_next->op_sibling->op_type != OP_EXIT &&
6861 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6862 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6863 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6864
57843af0 6865 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6866 Perl_warner(aTHX_ WARN_EXEC,
6867 "Statement unlikely to be reached");
6868 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6869 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6870 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6871 }
6872 }
6873 break;
aeea060c 6874
c750a3ec
MB		 6875 case OP_HELEM: {
6876 UNOP *rop;
6877 SV *lexname;
6878 GV **fields;
9615e741 6879 SV **svp, **indsvp, *sv;
c750a3ec 6880 I32 ind;
1c846c1f 6881 char *key = NULL;
c750a3ec 6882 STRLEN keylen;
aeea060c 6883
9615e741 6884 o->op_seq = PL_op_seqmax++;
1c846c1f
NIS		 6885
6886 if (((BINOP*)o)->op_last->op_type != OP_CONST)
c750a3ec 6887 break;
1c846c1f
NIS		 6888
6889 /* Make the CONST have a shared SV */
6890 svp = cSVOPx_svp(((BINOP*)o)->op_last);
3049cdab 6891 if ((!SvFAKE(sv = *svp) || !SvREADONLY(sv)) && !IS_PADCONST(sv)) {
1c846c1f 6892 key = SvPV(sv, keylen);
8fed10cd 6893 if (SvUTF8(sv))
c3654f1a
IH		 6894 keylen = -keylen;
6895 lexname = newSVpvn_share(key, keylen, 0);
1c846c1f
NIS		 6896 SvREFCNT_dec(sv);
6897 *svp = lexname;
6898 }
6899
6900 if ((o->op_private & (OPpLVAL_INTRO)))
6901 break;
6902
c750a3ec
MB		 6903 rop = (UNOP*)((BINOP*)o)->op_first;
6904 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6905 break;
3280af22 6906 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
524189f1 6907 if (!(SvFLAGS(lexname) & SVpad_TYPED))
c750a3ec 6908 break;
5196be3e 6909 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6910 if (!fields || !GvHV(*fields))
6911 break;
c750a3ec 6912 key = SvPV(*svp, keylen);
1aa99e6b
IH		 6913 if (SvUTF8(*svp))
6914 keylen = -keylen;
c750a3ec
MB		 6915 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6916 if (!indsvp) {
88e9b055 6917 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6918 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6919 }
6920 ind = SvIV(*indsvp);
6921 if (ind < 1)
cea2e8a9 6922 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6923 rop->op_type = OP_RV2AV;
22c35a8c 6924 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6925 o->op_type = OP_AELEM;
22c35a8c 6926 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6927 sv = newSViv(ind);
6928 if (SvREADONLY(*svp))
6929 SvREADONLY_on(sv);
6930 SvFLAGS(sv) |= (SvFLAGS(*svp)
6931 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6932 SvREFCNT_dec(*svp);
9615e741 6933 *svp = sv;
c750a3ec
MB		 6934 break;
6935 }
345599ca
GS		 6936
6937 case OP_HSLICE: {
6938 UNOP *rop;
6939 SV *lexname;
6940 GV **fields;
9615e741 6941 SV **svp, **indsvp, *sv;
345599ca
GS		 6942 I32 ind;
6943 char *key;
6944 STRLEN keylen;
6945 SVOP *first_key_op, *key_op;
9615e741
GS		 6946
6947 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6948 if ((o->op_private & (OPpLVAL_INTRO))
6949 /* I bet there's always a pushmark... */
6950 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6951 /* hmmm, no optimization if list contains only one key. */
6952 break;
6953 rop = (UNOP*)((LISTOP*)o)->op_last;
6954 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6955 break;
6956 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
524189f1 6957 if (!(SvFLAGS(lexname) & SVpad_TYPED))
345599ca
GS		 6958 break;
6959 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6960 if (!fields || !GvHV(*fields))
6961 break;
6962 /* Again guessing that the pushmark can be jumped over.... */
6963 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6964 ->op_first->op_sibling;
6965 /* Check that the key list contains only constants. */
6966 for (key_op = first_key_op; key_op;
6967 key_op = (SVOP*)key_op->op_sibling)
6968 if (key_op->op_type != OP_CONST)
6969 break;
6970 if (key_op)
6971 break;
6972 rop->op_type = OP_RV2AV;
6973 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6974 o->op_type = OP_ASLICE;
6975 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6976 for (key_op = first_key_op; key_op;
6977 key_op = (SVOP*)key_op->op_sibling) {
6978 svp = cSVOPx_svp(key_op);
6979 key = SvPV(*svp, keylen);
1aa99e6b
IH		 6980 if (SvUTF8(*svp))
6981 keylen = -keylen;
345599ca
GS		 6982 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6983 if (!indsvp) {
9615e741
GS		 6984 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6985 "in variable %s of type %s",
345599ca
GS		 6986 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6987 }
6988 ind = SvIV(*indsvp);
6989 if (ind < 1)
6990 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6991 sv = newSViv(ind);
6992 if (SvREADONLY(*svp))
6993 SvREADONLY_on(sv);
6994 SvFLAGS(sv) |= (SvFLAGS(*svp)
6995 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6996 SvREFCNT_dec(*svp);
9615e741 6997 *svp = sv;
345599ca
GS		 6998 }
6999 break;
7000 }
c750a3ec 7001
79072805 7002 default:
3280af22 7003 o->op_seq = PL_op_seqmax++;
79072805
LW		 7004 break;
7005 }
a0d0e21e 7006 oldop = o;
79072805 7007 }
a0d0e21e 7008 LEAVE;
79072805 7009}
beab0874
JT		 7010
7011#include "XSUB.h"
7012
7013/* Efficient sub that returns a constant scalar value. */
7014static void
7015const_sv_xsub(pTHXo_ CV* cv)
7016{
7017 dXSARGS;
9cbac4c7
DM		 7018 if (items != 0) {
7019#if 0
7020 Perl_croak(aTHX_ "usage: %s::%s()",
7021 HvNAME(GvSTASH(CvGV(cv))), GvNAME(CvGV(cv)));
7022#endif
7023 }
9a049f1c 7024 EXTEND(sp, 1);
0768512c 7025 ST(0) = (SV*)XSANY.any_ptr;
beab0874
JT		 7026 XSRETURN(1);
7027}
2b9d42f0 7028
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