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Make \x{...} consistently produce UTF-8.
[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e 24
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
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
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"));
c750a3ec
MB		 186 SvOBJECT_on(sv);
187 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 188 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
189 PL_sv_objcount++;
c750a3ec 190 }
f472eb5c
GS		 191 if (PL_in_my == KEY_our) {
192 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 193 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 194 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 195 }
3280af22 196 av_store(PL_comppad_name, off, sv);
65202027 197 SvNVX(sv) = (NV)PAD_MAX;
8990e307 198 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 199 if (!PL_min_intro_pending)
200 PL_min_intro_pending = off;
201 PL_max_intro_pending = off;
93a17b20 202 if (*name == '@')
3280af22 203 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 204 else if (*name == '%')
3280af22
NIS		 205 av_store(PL_comppad, off, (SV*)newHV());
206 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 207 return off;
208}
209
94f23f41
GS		 210STATIC PADOFFSET
211S_pad_addlex(pTHX_ SV *proto_namesv)
212{
213 SV *namesv = NEWSV(1103,0);
214 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
215 sv_upgrade(namesv, SVt_PVNV);
216 sv_setpv(namesv, SvPVX(proto_namesv));
217 av_store(PL_comppad_name, newoff, namesv);
218 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
219 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
220 SvFAKE_on(namesv); /* A ref, not a real var */
221 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
222 SvFLAGS(namesv) |= SVpad_OUR;
223 (void)SvUPGRADE(namesv, SVt_PVGV);
224 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
225 }
226 if (SvOBJECT(proto_namesv)) { /* A typed var */
227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
230 PL_sv_objcount++;
231 }
232 return newoff;
233}
234
2680586e
GS		 235#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
236
76e3520e 237STATIC PADOFFSET
cea2e8a9 238S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 239 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 240{
11343788 241 dTHR;
748a9306 242 CV *cv;
93a17b20
LW		 243 I32 off;
244 SV *sv;
93a17b20 245 register I32 i;
c09156bb 246 register PERL_CONTEXT *cx;
93a17b20 247
748a9306 248 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 249 AV *curlist = CvPADLIST(cv);
250 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 251 AV *curname;
4fdae800 252
3280af22 253 if (!svp || *svp == &PL_sv_undef)
4633a7c4 254 continue;
748a9306
LW		 255 curname = (AV*)*svp;
256 svp = AvARRAY(curname);
93965878 257 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 258 if ((sv = svp[off]) &&
3280af22 259 sv != &PL_sv_undef &&
748a9306 260 seq <= SvIVX(sv) &&
13826f2c 261 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 262 strEQ(SvPVX(sv), name))
263 {
5f05dabc 264 I32 depth;
265 AV *oldpad;
266 SV *oldsv;
267
268 depth = CvDEPTH(cv);
269 if (!depth) {
9607fc9c 270 if (newoff) {
271 if (SvFAKE(sv))
272 continue;
4fdae800 273 return 0; /* don't clone from inactive stack frame */
9607fc9c 274 }
5f05dabc 275 depth = 1;
276 }
94f23f41 277 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 278 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 279 if (!newoff) { /* Not a mere clone operation. */
94f23f41 280 newoff = pad_addlex(sv);
3280af22 281 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 282 /* "It's closures all the way down." */
3280af22 283 CvCLONE_on(PL_compcv);
54310121 284 if (cv == startcv) {
3280af22 285 if (CvANON(PL_compcv))
54310121 286 oldsv = Nullsv; /* no need to keep ref */
287 }
288 else {
28757baa 289 CV *bcv;
290 for (bcv = startcv;
291 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 292 bcv = CvOUTSIDE(bcv))
293 {
94f23f41
GS		 294 if (CvANON(bcv)) {
295 /* install the missing pad entry in intervening
296 * nested subs and mark them cloneable.
297 * XXX fix pad_foo() to not use globals */
298 AV *ocomppad_name = PL_comppad_name;
299 AV *ocomppad = PL_comppad;
300 SV **ocurpad = PL_curpad;
301 AV *padlist = CvPADLIST(bcv);
302 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
303 PL_comppad = (AV*)AvARRAY(padlist)[1];
304 PL_curpad = AvARRAY(PL_comppad);
305 pad_addlex(sv);
306 PL_comppad_name = ocomppad_name;
307 PL_comppad = ocomppad;
308 PL_curpad = ocurpad;
28757baa 309 CvCLONE_on(bcv);
94f23f41 310 }
28757baa 311 else {
6b35e009
GS		 312 if (ckWARN(WARN_CLOSURE)
313 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
314 {
cea2e8a9 315 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 316 "Variable \"%s\" may be unavailable",
28757baa 317 name);
6b35e009 318 }
28757baa 319 break;
320 }
321 }
322 }
323 }
3280af22 324 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 325 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
326 && !(SvFLAGS(sv) & SVpad_OUR))
327 {
cea2e8a9 328 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 329 "Variable \"%s\" will not stay shared", name);
741b6338 330 }
5f05dabc 331 }
748a9306 332 }
3280af22 333 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 334 return newoff;
335 }
93a17b20
LW		 336 }
337 }
338
2680586e
GS		 339 if (flags & FINDLEX_NOSEARCH)
340 return 0;
341
93a17b20
LW		 342 /* Nothing in current lexical context--try eval's context, if any.
343 * This is necessary to let the perldb get at lexically scoped variables.
344 * XXX This will also probably interact badly with eval tree caching.
345 */
346
748a9306 347 for (i = cx_ix; i >= 0; i--) {
93a17b20 348 cx = &cxstack[i];
6b35e009 349 switch (CxTYPE(cx)) {
93a17b20 350 default:
748a9306
LW		 351 if (i == 0 && saweval) {
352 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 353 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 354 }
93a17b20
LW		 355 break;
356 case CXt_EVAL:
44a8e56a 357 switch (cx->blk_eval.old_op_type) {
358 case OP_ENTEREVAL:
6b35e009
GS		 359 if (CxREALEVAL(cx))
360 saweval = i;
44a8e56a 361 break;
faa7e5bb 362 case OP_DOFILE:
44a8e56a 363 case OP_REQUIRE:
faa7e5bb 364 /* require/do must have their own scope */
44a8e56a 365 return 0;
366 }
93a17b20 367 break;
7766f137 368 case CXt_FORMAT:
93a17b20
LW		 369 case CXt_SUB:
370 if (!saweval)
371 return 0;
372 cv = cx->blk_sub.cv;
3280af22 373 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 374 saweval = i; /* so we know where we were called from */
93a17b20 375 continue;
93a17b20 376 }
748a9306 377 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 378 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 379 }
380 }
381
748a9306
LW		 382 return 0;
383}
a0d0e21e 384
748a9306 385PADOFFSET
864dbfa3 386Perl_pad_findmy(pTHX_ char *name)
748a9306 387{
11343788 388 dTHR;
748a9306 389 I32 off;
54310121 390 I32 pendoff = 0;
748a9306 391 SV *sv;
3280af22
NIS		 392 SV **svp = AvARRAY(PL_comppad_name);
393 U32 seq = PL_cop_seqmax;
6b35e009 394 PERL_CONTEXT *cx;
33b8ce05 395 CV *outside;
748a9306 396
11343788
MB		 397#ifdef USE_THREADS
398 /*
399 * Special case to get lexical (and hence per-thread) @_.
400 * XXX I need to find out how to tell at parse-time whether use
401 * of @_ should refer to a lexical (from a sub) or defgv (global
402 * scope and maybe weird sub-ish things like formats). See
403 * startsub in perly.y. It's possible that @_ could be lexical
404 * (at least from subs) even in non-threaded perl.
405 */
406 if (strEQ(name, "@_"))
407 return 0; /* success. (NOT_IN_PAD indicates failure) */
408#endif /* USE_THREADS */
409
748a9306 410 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 411 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 412 if ((sv = svp[off]) &&
3280af22 413 sv != &PL_sv_undef &&
54310121 414 (!SvIVX(sv) ||
415 (seq <= SvIVX(sv) &&
416 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 417 strEQ(SvPVX(sv), name))
418 {
77ca0c92 419 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 420 return (PADOFFSET)off;
421 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 422 }
423 }
748a9306 424
33b8ce05
GS		 425 outside = CvOUTSIDE(PL_compcv);
426
427 /* Check if if we're compiling an eval'', and adjust seq to be the
428 * eval's seq number. This depends on eval'' having a non-null
429 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 430 * identified by CvEVAL being true and CvGV being null. */
431 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 432 cx = &cxstack[cxstack_ix];
433 if (CxREALEVAL(cx))
434 seq = cx->blk_oldcop->cop_seq;
435 }
436
748a9306 437 /* See if it's in a nested scope */
2680586e 438 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 439 if (off) {
440 /* If there is a pending local definition, this new alias must die */
441 if (pendoff)
3280af22 442 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 443 return off; /* pad_findlex returns 0 for failure...*/
54310121 444 }
11343788 445 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 446}
447
448void
864dbfa3 449Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 450{
0453d815 451 dTHR;
93a17b20 452 I32 off;
3280af22 453 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 454 SV *sv;
3280af22
NIS		 455 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
456 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 457 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
458 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 459 }
460 }
461 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 462 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 463 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 464 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 465 }
466}
467
468PADOFFSET
864dbfa3 469Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 470{
11343788 471 dTHR;
79072805
LW		 472 SV *sv;
473 I32 retval;
474
3280af22 475 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 476 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 477 if (PL_pad_reset_pending)
a0d0e21e 478 pad_reset();
ed6116ce 479 if (tmptype & SVs_PADMY) {
79072805 480 do {
3280af22 481 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 482 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 483 retval = AvFILLp(PL_comppad);
79072805
LW		 484 }
485 else {
3280af22
NIS		 486 SV **names = AvARRAY(PL_comppad_name);
487 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 488 for (;;) {
489 /*
490 * "foreach" index vars temporarily become aliases to non-"my"
491 * values. Thus we must skip, not just pad values that are
492 * marked as current pad values, but also those with names.
493 */
3280af22
NIS		 494 if (++PL_padix <= names_fill &&
495 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 496 continue;
3280af22 497 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
3049cdab
SB		 498 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) &&
499 !IS_PADGV(sv) && !IS_PADCONST(sv))
bbce6d69 500 break;
501 }
3280af22 502 retval = PL_padix;
79072805 503 }
8990e307 504 SvFLAGS(sv) |= tmptype;
3280af22 505 PL_curpad = AvARRAY(PL_comppad);
11343788 506#ifdef USE_THREADS
b900a521
JH		 507 DEBUG_X(PerlIO_printf(Perl_debug_log,
508 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
509 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 510 (long) retval, PL_op_name[optype]));
11343788 511#else
b900a521
JH		 512 DEBUG_X(PerlIO_printf(Perl_debug_log,
513 "Pad 0x%"UVxf" alloc %ld for %s\n",
514 PTR2UV(PL_curpad),
22c35a8c 515 (long) retval, PL_op_name[optype]));
11343788 516#endif /* USE_THREADS */
79072805
LW		 517 return (PADOFFSET)retval;
518}
519
520SV *
864dbfa3 521Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 522{
11343788
MB		 523 dTHR;
524#ifdef USE_THREADS
b900a521 525 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 526 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
527 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 528#else
79072805 529 if (!po)
cea2e8a9 530 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 531 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
532 PTR2UV(PL_curpad), (IV)po));
11343788 533#endif /* USE_THREADS */
3280af22 534 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 535}
536
537void
864dbfa3 538Perl_pad_free(pTHX_ PADOFFSET po)
79072805 539{
11343788 540 dTHR;
3280af22 541 if (!PL_curpad)
a0d0e21e 542 return;
3280af22 543 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 544 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 545 if (!po)
cea2e8a9 546 Perl_croak(aTHX_ "panic: pad_free po");
11343788 547#ifdef USE_THREADS
b900a521 548 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 549 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 550 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 551#else
97835f67
JH		 552 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
553 PTR2UV(PL_curpad), (IV)po));
11343788 554#endif /* USE_THREADS */
2aa1bedc 555 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 556 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 557#ifdef USE_ITHREADS
558 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
559#endif
560 }
3280af22
NIS		 561 if ((I32)po < PL_padix)
562 PL_padix = po - 1;
79072805
LW		 563}
564
565void
864dbfa3 566Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 567{
11343788 568 dTHR;
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
11343788 598 dTHR;
79072805
LW		 599 register I32 po;
600
6b88bc9c 601 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 602 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 603#ifdef USE_THREADS
b900a521
JH		 604 DEBUG_X(PerlIO_printf(Perl_debug_log,
605 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
606 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 607#else
b900a521
JH		 608 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
609 PTR2UV(PL_curpad)));
11343788 610#endif /* USE_THREADS */
6b88bc9c
GS		 611 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
612 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
613 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
614 SvPADTMP_off(PL_curpad[po]);
748a9306 615 }
6b88bc9c 616 PL_padix = PL_padix_floor;
79072805 617 }
d9bb4600 618#endif
3280af22 619 PL_pad_reset_pending = FALSE;
79072805
LW		 620}
621
a863c7d1 622#ifdef USE_THREADS
54b9620d 623/* find_threadsv is not reentrant */
a863c7d1 624PADOFFSET
864dbfa3 625Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 626{
627 dTHR;
628 char *p;
629 PADOFFSET key;
554b3eca 630 SV **svp;
54b9620d 631 /* We currently only handle names of a single character */
533c011a 632 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 633 if (!p)
634 return NOT_IN_PAD;
533c011a 635 key = p - PL_threadsv_names;
2d8e6c8d 636 MUTEX_LOCK(&thr->mutex);
54b9620d 637 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 638 if (svp)
639 MUTEX_UNLOCK(&thr->mutex);
640 else {
554b3eca 641 SV *sv = NEWSV(0, 0);
54b9620d 642 av_store(thr->threadsv, key, sv);
940cb80d 643 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 644 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 645 /*
646 * Some magic variables used to be automagically initialised
647 * in gv_fetchpv. Those which are now per-thread magicals get
648 * initialised here instead.
649 */
650 switch (*name) {
54b9620d
MB		 651 case '_':
652 break;
554b3eca
MB		 653 case ';':
654 sv_setpv(sv, "\034");
1c846c1f 655 sv_magic(sv, 0, 0, name, 1);
554b3eca 656 break;
c277df42
IZ		 657 case '&':
658 case '`':
659 case '\'':
533c011a 660 PL_sawampersand = TRUE;
a3f914c5
GS		 661 /* FALL THROUGH */
662 case '1':
663 case '2':
664 case '3':
665 case '4':
666 case '5':
667 case '6':
668 case '7':
669 case '8':
670 case '9':
c277df42 671 SvREADONLY_on(sv);
d8b5173a 672 /* FALL THROUGH */
067391ea
GS		 673
674 /* XXX %! tied to Errno.pm needs to be added here.
675 * See gv_fetchpv(). */
676 /* case '!': */
677
54b9620d 678 default:
1c846c1f 679 sv_magic(sv, 0, 0, name, 1);
554b3eca 680 }
bf49b057 681 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 682 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 683 sv, (*name < 32) ? "^" : "",
684 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 685 }
686 return key;
687}
688#endif /* USE_THREADS */
689
79072805
LW		 690/* Destructor */
691
692void
864dbfa3 693Perl_op_free(pTHX_ OP *o)
79072805 694{
85e6fe83 695 register OP *kid, *nextkid;
acb36ea4 696 OPCODE type;
79072805 697
5dc0d613 698 if (!o || o->op_seq == (U16)-1)
79072805
LW		 699 return;
700
7934575e
GS		 701 if (o->op_private & OPpREFCOUNTED) {
702 switch (o->op_type) {
703 case OP_LEAVESUB:
704 case OP_LEAVESUBLV:
705 case OP_LEAVEEVAL:
706 case OP_LEAVE:
707 case OP_SCOPE:
708 case OP_LEAVEWRITE:
709 OP_REFCNT_LOCK;
710 if (OpREFCNT_dec(o)) {
711 OP_REFCNT_UNLOCK;
712 return;
713 }
714 OP_REFCNT_UNLOCK;
715 break;
716 default:
717 break;
718 }
719 }
720
11343788
MB		 721 if (o->op_flags & OPf_KIDS) {
722 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 723 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 724 op_free(kid);
85e6fe83 725 }
79072805 726 }
acb36ea4
GS		 727 type = o->op_type;
728 if (type == OP_NULL)
729 type = o->op_targ;
730
731 /* COP* is not cleared by op_clear() so that we may track line
732 * numbers etc even after null() */
733 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
734 cop_free((COP*)o);
735
736 op_clear(o);
737
738#ifdef PL_OP_SLAB_ALLOC
739 if ((char *) o == PL_OpPtr)
740 {
741 }
742#else
743 Safefree(o);
744#endif
745}
79072805 746
acb36ea4
GS		 747STATIC void
748S_op_clear(pTHX_ OP *o)
749{
11343788 750 switch (o->op_type) {
acb36ea4
GS		 751 case OP_NULL: /* Was holding old type, if any. */
752 case OP_ENTEREVAL: /* Was holding hints. */
753#ifdef USE_THREADS
754 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
755#endif
756 o->op_targ = 0;
a0d0e21e 757 break;
554b3eca 758#ifdef USE_THREADS
8dd3ba40
SM		 759 case OP_ENTERITER:
760 if (!(o->op_flags & OPf_SPECIAL))
761 break;
762 /* FALL THROUGH */
554b3eca 763#endif /* USE_THREADS */
a6006777 764 default:
ac4c12e7 765 if (!(o->op_flags & OPf_REF)
0b94c7bb 766 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 767 break;
768 /* FALL THROUGH */
463ee0b2 769 case OP_GVSV:
79072805 770 case OP_GV:
a6006777 771 case OP_AELEMFAST:
350de78d 772#ifdef USE_ITHREADS
971a9dd3
GS		 773 if (cPADOPo->op_padix > 0) {
774 if (PL_curpad) {
638eceb6 775 GV *gv = cGVOPo_gv;
971a9dd3
GS		 776 pad_swipe(cPADOPo->op_padix);
777 /* No GvIN_PAD_off(gv) here, because other references may still
778 * exist on the pad */
779 SvREFCNT_dec(gv);
780 }
781 cPADOPo->op_padix = 0;
782 }
350de78d 783#else
971a9dd3 784 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 785 cSVOPo->op_sv = Nullsv;
350de78d 786#endif
79072805 787 break;
a1ae71d2 788 case OP_METHOD_NAMED:
79072805 789 case OP_CONST:
11343788 790 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 791 cSVOPo->op_sv = Nullsv;
79072805 792 break;
748a9306
LW		 793 case OP_GOTO:
794 case OP_NEXT:
795 case OP_LAST:
796 case OP_REDO:
11343788 797 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 798 break;
799 /* FALL THROUGH */
a0d0e21e 800 case OP_TRANS:
acb36ea4 801 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 802 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 803 cSVOPo->op_sv = Nullsv;
804 }
805 else {
a0ed51b3 806 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 807 cPVOPo->op_pv = Nullch;
808 }
a0d0e21e
LW		 809 break;
810 case OP_SUBST:
11343788 811 op_free(cPMOPo->op_pmreplroot);
971a9dd3 812 goto clear_pmop;
748a9306 813 case OP_PUSHRE:
971a9dd3
GS		 814#ifdef USE_ITHREADS
815 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
816 if (PL_curpad) {
817 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
818 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
819 /* No GvIN_PAD_off(gv) here, because other references may still
820 * exist on the pad */
821 SvREFCNT_dec(gv);
822 }
823 }
824#else
825 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
826#endif
827 /* FALL THROUGH */
a0d0e21e 828 case OP_MATCH:
8782bef2 829 case OP_QR:
971a9dd3
GS		 830clear_pmop:
831 cPMOPo->op_pmreplroot = Nullop;
c277df42 832 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 833 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 834 break;
79072805
LW		 835 }
836
743e66e6 837 if (o->op_targ > 0) {
11343788 838 pad_free(o->op_targ);
743e66e6
GS		 839 o->op_targ = 0;
840 }
79072805
LW		 841}
842
76e3520e 843STATIC void
3eb57f73
HS		 844S_cop_free(pTHX_ COP* cop)
845{
846 Safefree(cop->cop_label);
57843af0 847#ifdef USE_ITHREADS
f4dd75d9
GS		 848 Safefree(CopFILE(cop)); /* XXX share in a pvtable? */
849 Safefree(CopSTASHPV(cop)); /* XXX share in a pvtable? */
57843af0 850#else
11faa288 851 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 852 SvREFCNT_dec(CopFILEGV(cop));
57843af0 853#endif
0453d815 854 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 855 SvREFCNT_dec(cop->cop_warnings);
856}
857
858STATIC void
cea2e8a9 859S_null(pTHX_ OP *o)
8990e307 860{
acb36ea4
GS		 861 if (o->op_type == OP_NULL)
862 return;
863 op_clear(o);
11343788
MB		 864 o->op_targ = o->op_type;
865 o->op_type = OP_NULL;
22c35a8c 866 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 867}
868
79072805
LW		 869/* Contextualizers */
870
463ee0b2 871#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 872
873OP *
864dbfa3 874Perl_linklist(pTHX_ OP *o)
79072805
LW		 875{
876 register OP *kid;
877
11343788
MB		 878 if (o->op_next)
879 return o->op_next;
79072805
LW		 880
881 /* establish postfix order */
11343788
MB		 882 if (cUNOPo->op_first) {
883 o->op_next = LINKLIST(cUNOPo->op_first);
884 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 885 if (kid->op_sibling)
886 kid->op_next = LINKLIST(kid->op_sibling);
887 else
11343788 888 kid->op_next = o;
79072805
LW		 889 }
890 }
891 else
11343788 892 o->op_next = o;
79072805 893
11343788 894 return o->op_next;
79072805
LW		 895}
896
897OP *
864dbfa3 898Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 899{
900 OP *kid;
11343788
MB		 901 if (o && o->op_flags & OPf_KIDS) {
902 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 903 scalar(kid);
904 }
11343788 905 return o;
79072805
LW		 906}
907
76e3520e 908STATIC OP *
cea2e8a9 909S_scalarboolean(pTHX_ OP *o)
8990e307 910{
d008e5eb 911 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 912 dTHR;
d008e5eb 913 if (ckWARN(WARN_SYNTAX)) {
57843af0 914 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 915
d008e5eb 916 if (PL_copline != NOLINE)
57843af0 917 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 918 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 919 CopLINE_set(PL_curcop, oldline);
d008e5eb 920 }
a0d0e21e 921 }
11343788 922 return scalar(o);
8990e307
LW		 923}
924
925OP *
864dbfa3 926Perl_scalar(pTHX_ OP *o)
79072805
LW		 927{
928 OP *kid;
929
a0d0e21e 930 /* assumes no premature commitment */
3280af22 931 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 932 || o->op_type == OP_RETURN)
7e363e51 933 {
11343788 934 return o;
7e363e51 935 }
79072805 936
5dc0d613 937 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 938
11343788 939 switch (o->op_type) {
79072805 940 case OP_REPEAT:
11343788
MB		 941 if (o->op_private & OPpREPEAT_DOLIST)
942 null(((LISTOP*)cBINOPo->op_first)->op_first);
943 scalar(cBINOPo->op_first);
8990e307 944 break;
79072805
LW		 945 case OP_OR:
946 case OP_AND:
947 case OP_COND_EXPR:
11343788 948 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 949 scalar(kid);
79072805 950 break;
a0d0e21e 951 case OP_SPLIT:
11343788 952 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 953 if (!kPMOP->op_pmreplroot)
954 deprecate("implicit split to @_");
955 }
956 /* FALL THROUGH */
79072805 957 case OP_MATCH:
8782bef2 958 case OP_QR:
79072805
LW		 959 case OP_SUBST:
960 case OP_NULL:
8990e307 961 default:
11343788
MB		 962 if (o->op_flags & OPf_KIDS) {
963 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 964 scalar(kid);
965 }
79072805
LW		 966 break;
967 case OP_LEAVE:
968 case OP_LEAVETRY:
5dc0d613 969 kid = cLISTOPo->op_first;
54310121 970 scalar(kid);
155aba94 971 while ((kid = kid->op_sibling)) {
54310121 972 if (kid->op_sibling)
973 scalarvoid(kid);
974 else
975 scalar(kid);
976 }
3280af22 977 WITH_THR(PL_curcop = &PL_compiling);
54310121 978 break;
748a9306 979 case OP_SCOPE:
79072805 980 case OP_LINESEQ:
8990e307 981 case OP_LIST:
11343788 982 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 983 if (kid->op_sibling)
984 scalarvoid(kid);
985 else
986 scalar(kid);
987 }
3280af22 988 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 989 break;
990 }
11343788 991 return o;
79072805
LW		 992}
993
994OP *
864dbfa3 995Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 996{
997 OP *kid;
8990e307
LW		 998 char* useless = 0;
999 SV* sv;
2ebea0a1
GS		 1000 U8 want;
1001
acb36ea4
GS		 1002 if (o->op_type == OP_NEXTSTATE
1003 || o->op_type == OP_SETSTATE
1004 || o->op_type == OP_DBSTATE
1005 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1006 || o->op_targ == OP_SETSTATE
1007 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1008 {
1009 dTHR;
1010 PL_curcop = (COP*)o; /* for warning below */
1011 }
79072805 1012
54310121 1013 /* assumes no premature commitment */
2ebea0a1
GS		 1014 want = o->op_flags & OPf_WANT;
1015 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1016 || o->op_type == OP_RETURN)
7e363e51 1017 {
11343788 1018 return o;
7e363e51 1019 }
79072805 1020
b162f9ea 1021 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1022 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1023 {
b162f9ea 1024 return scalar(o); /* As if inside SASSIGN */
7e363e51 1025 }
1c846c1f 1026
5dc0d613 1027 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1028
11343788 1029 switch (o->op_type) {
79072805 1030 default:
22c35a8c 1031 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1032 break;
36477c24 1033 /* FALL THROUGH */
1034 case OP_REPEAT:
11343788 1035 if (o->op_flags & OPf_STACKED)
8990e307 1036 break;
5d82c453
GA		 1037 goto func_ops;
1038 case OP_SUBSTR:
1039 if (o->op_private == 4)
1040 break;
8990e307
LW		 1041 /* FALL THROUGH */
1042 case OP_GVSV:
1043 case OP_WANTARRAY:
1044 case OP_GV:
1045 case OP_PADSV:
1046 case OP_PADAV:
1047 case OP_PADHV:
1048 case OP_PADANY:
1049 case OP_AV2ARYLEN:
8990e307 1050 case OP_REF:
a0d0e21e
LW		 1051 case OP_REFGEN:
1052 case OP_SREFGEN:
8990e307
LW		 1053 case OP_DEFINED:
1054 case OP_HEX:
1055 case OP_OCT:
1056 case OP_LENGTH:
8990e307
LW		 1057 case OP_VEC:
1058 case OP_INDEX:
1059 case OP_RINDEX:
1060 case OP_SPRINTF:
1061 case OP_AELEM:
1062 case OP_AELEMFAST:
1063 case OP_ASLICE:
8990e307
LW		 1064 case OP_HELEM:
1065 case OP_HSLICE:
1066 case OP_UNPACK:
1067 case OP_PACK:
8990e307
LW		 1068 case OP_JOIN:
1069 case OP_LSLICE:
1070 case OP_ANONLIST:
1071 case OP_ANONHASH:
1072 case OP_SORT:
1073 case OP_REVERSE:
1074 case OP_RANGE:
1075 case OP_FLIP:
1076 case OP_FLOP:
1077 case OP_CALLER:
1078 case OP_FILENO:
1079 case OP_EOF:
1080 case OP_TELL:
1081 case OP_GETSOCKNAME:
1082 case OP_GETPEERNAME:
1083 case OP_READLINK:
1084 case OP_TELLDIR:
1085 case OP_GETPPID:
1086 case OP_GETPGRP:
1087 case OP_GETPRIORITY:
1088 case OP_TIME:
1089 case OP_TMS:
1090 case OP_LOCALTIME:
1091 case OP_GMTIME:
1092 case OP_GHBYNAME:
1093 case OP_GHBYADDR:
1094 case OP_GHOSTENT:
1095 case OP_GNBYNAME:
1096 case OP_GNBYADDR:
1097 case OP_GNETENT:
1098 case OP_GPBYNAME:
1099 case OP_GPBYNUMBER:
1100 case OP_GPROTOENT:
1101 case OP_GSBYNAME:
1102 case OP_GSBYPORT:
1103 case OP_GSERVENT:
1104 case OP_GPWNAM:
1105 case OP_GPWUID:
1106 case OP_GGRNAM:
1107 case OP_GGRGID:
1108 case OP_GETLOGIN:
5d82c453 1109 func_ops:
64aac5a9 1110 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1111 useless = PL_op_desc[o->op_type];
8990e307
LW		 1112 break;
1113
1114 case OP_RV2GV:
1115 case OP_RV2SV:
1116 case OP_RV2AV:
1117 case OP_RV2HV:
192587c2 1118 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1119 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1120 useless = "a variable";
1121 break;
79072805
LW		 1122
1123 case OP_CONST:
7766f137 1124 sv = cSVOPo_sv;
7a52d87a
GS		 1125 if (cSVOPo->op_private & OPpCONST_STRICT)
1126 no_bareword_allowed(o);
1127 else {
d008e5eb
GS		 1128 dTHR;
1129 if (ckWARN(WARN_VOID)) {
1130 useless = "a constant";
1131 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1132 useless = 0;
1133 else if (SvPOK(sv)) {
1134 if (strnEQ(SvPVX(sv), "di", 2) ||
1135 strnEQ(SvPVX(sv), "ds", 2) ||
1136 strnEQ(SvPVX(sv), "ig", 2))
1137 useless = 0;
1138 }
8990e307
LW		 1139 }
1140 }
acb36ea4 1141 null(o); /* don't execute or even remember it */
79072805
LW		 1142 break;
1143
1144 case OP_POSTINC:
11343788 1145 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1146 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1147 break;
1148
1149 case OP_POSTDEC:
11343788 1150 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1151 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1152 break;
1153
79072805
LW		 1154 case OP_OR:
1155 case OP_AND:
1156 case OP_COND_EXPR:
11343788 1157 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1158 scalarvoid(kid);
1159 break;
5aabfad6 1160
a0d0e21e 1161 case OP_NULL:
11343788 1162 if (o->op_flags & OPf_STACKED)
a0d0e21e 1163 break;
5aabfad6 1164 /* FALL THROUGH */
2ebea0a1
GS		 1165 case OP_NEXTSTATE:
1166 case OP_DBSTATE:
79072805
LW		 1167 case OP_ENTERTRY:
1168 case OP_ENTER:
11343788 1169 if (!(o->op_flags & OPf_KIDS))
79072805 1170 break;
54310121 1171 /* FALL THROUGH */
463ee0b2 1172 case OP_SCOPE:
79072805
LW		 1173 case OP_LEAVE:
1174 case OP_LEAVETRY:
a0d0e21e 1175 case OP_LEAVELOOP:
79072805 1176 case OP_LINESEQ:
79072805 1177 case OP_LIST:
11343788 1178 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1179 scalarvoid(kid);
1180 break;
c90c0ff4 1181 case OP_ENTEREVAL:
5196be3e 1182 scalarkids(o);
c90c0ff4 1183 break;
5aabfad6 1184 case OP_REQUIRE:
c90c0ff4 1185 /* all requires must return a boolean value */
5196be3e 1186 o->op_flags &= ~OPf_WANT;
d6483035
GS		 1187 /* FALL THROUGH */
1188 case OP_SCALAR:
5196be3e 1189 return scalar(o);
a0d0e21e 1190 case OP_SPLIT:
11343788 1191 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1192 if (!kPMOP->op_pmreplroot)
1193 deprecate("implicit split to @_");
1194 }
1195 break;
79072805 1196 }
d008e5eb
GS		 1197 if (useless) {
1198 dTHR;
1199 if (ckWARN(WARN_VOID))
cea2e8a9 1200 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1201 }
11343788 1202 return o;
79072805
LW		 1203}
1204
1205OP *
864dbfa3 1206Perl_listkids(pTHX_ OP *o)
79072805
LW		 1207{
1208 OP *kid;
11343788
MB		 1209 if (o && o->op_flags & OPf_KIDS) {
1210 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1211 list(kid);
1212 }
11343788 1213 return o;
79072805
LW		 1214}
1215
1216OP *
864dbfa3 1217Perl_list(pTHX_ OP *o)
79072805
LW		 1218{
1219 OP *kid;
1220
a0d0e21e 1221 /* assumes no premature commitment */
3280af22 1222 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1223 || o->op_type == OP_RETURN)
7e363e51 1224 {
11343788 1225 return o;
7e363e51 1226 }
79072805 1227
b162f9ea 1228 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1229 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1230 {
b162f9ea 1231 return o; /* As if inside SASSIGN */
7e363e51 1232 }
1c846c1f 1233
5dc0d613 1234 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1235
11343788 1236 switch (o->op_type) {
79072805
LW		 1237 case OP_FLOP:
1238 case OP_REPEAT:
11343788 1239 list(cBINOPo->op_first);
79072805
LW		 1240 break;
1241 case OP_OR:
1242 case OP_AND:
1243 case OP_COND_EXPR:
11343788 1244 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1245 list(kid);
1246 break;
1247 default:
1248 case OP_MATCH:
8782bef2 1249 case OP_QR:
79072805
LW		 1250 case OP_SUBST:
1251 case OP_NULL:
11343788 1252 if (!(o->op_flags & OPf_KIDS))
79072805 1253 break;
11343788
MB		 1254 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1255 list(cBINOPo->op_first);
1256 return gen_constant_list(o);
79072805
LW		 1257 }
1258 case OP_LIST:
11343788 1259 listkids(o);
79072805
LW		 1260 break;
1261 case OP_LEAVE:
1262 case OP_LEAVETRY:
5dc0d613 1263 kid = cLISTOPo->op_first;
54310121 1264 list(kid);
155aba94 1265 while ((kid = kid->op_sibling)) {
54310121 1266 if (kid->op_sibling)
1267 scalarvoid(kid);
1268 else
1269 list(kid);
1270 }
3280af22 1271 WITH_THR(PL_curcop = &PL_compiling);
54310121 1272 break;
748a9306 1273 case OP_SCOPE:
79072805 1274 case OP_LINESEQ:
11343788 1275 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1276 if (kid->op_sibling)
1277 scalarvoid(kid);
1278 else
1279 list(kid);
1280 }
3280af22 1281 WITH_THR(PL_curcop = &PL_compiling);
79072805 1282 break;
c90c0ff4 1283 case OP_REQUIRE:
1284 /* all requires must return a boolean value */
5196be3e
MB		 1285 o->op_flags &= ~OPf_WANT;
1286 return scalar(o);
79072805 1287 }
11343788 1288 return o;
79072805
LW		 1289}
1290
1291OP *
864dbfa3 1292Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1293{
1294 OP *kid;
1295
11343788
MB		 1296 if (o) {
1297 if (o->op_type == OP_LINESEQ ||
1298 o->op_type == OP_SCOPE ||
1299 o->op_type == OP_LEAVE ||
1300 o->op_type == OP_LEAVETRY)
463ee0b2 1301 {
0f15f207 1302 dTHR;
11343788 1303 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1304 if (kid->op_sibling) {
463ee0b2 1305 scalarvoid(kid);
ed6116ce 1306 }
463ee0b2 1307 }
3280af22 1308 PL_curcop = &PL_compiling;
79072805 1309 }
11343788 1310 o->op_flags &= ~OPf_PARENS;
3280af22 1311 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1312 o->op_flags |= OPf_PARENS;
79072805 1313 }
8990e307 1314 else
11343788
MB		 1315 o = newOP(OP_STUB, 0);
1316 return o;
79072805
LW		 1317}
1318
76e3520e 1319STATIC OP *
cea2e8a9 1320S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1321{
1322 OP *kid;
11343788
MB		 1323 if (o && o->op_flags & OPf_KIDS) {
1324 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1325 mod(kid, type);
79072805 1326 }
11343788 1327 return o;
79072805
LW		 1328}
1329
79072805 1330OP *
864dbfa3 1331Perl_mod(pTHX_ OP *o, I32 type)
79072805 1332{
11343788 1333 dTHR;
79072805 1334 OP *kid;
2d8e6c8d 1335 STRLEN n_a;
79072805 1336
3280af22 1337 if (!o || PL_error_count)
11343788 1338 return o;
79072805 1339
b162f9ea 1340 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1341 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1342 {
b162f9ea 1343 return o;
7e363e51 1344 }
1c846c1f 1345
11343788 1346 switch (o->op_type) {
68dc0745 1347 case OP_UNDEF:
3280af22 1348 PL_modcount++;
5dc0d613 1349 return o;
a0d0e21e 1350 case OP_CONST:
11343788 1351 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1352 goto nomod;
3280af22 1353 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1354 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1355 PL_eval_start = 0;
a0d0e21e
LW		 1356 }
1357 else if (!type) {
3280af22
NIS		 1358 SAVEI32(PL_compiling.cop_arybase);
1359 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1360 }
1361 else if (type == OP_REFGEN)
1362 goto nomod;
1363 else
cea2e8a9 1364 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1365 break;
5f05dabc 1366 case OP_STUB:
5196be3e 1367 if (o->op_flags & OPf_PARENS)
5f05dabc 1368 break;
1369 goto nomod;
a0d0e21e
LW		 1370 case OP_ENTERSUB:
1371 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1372 !(o->op_flags & OPf_STACKED)) {
1373 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1374 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1375 assert(cUNOPo->op_first->op_type == OP_NULL);
1376 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1377 break;
1378 }
cd06dffe
GS		 1379 else { /* lvalue subroutine call */
1380 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1381 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1382 /* Backward compatibility mode: */
1383 o->op_private |= OPpENTERSUB_INARGS;
1384 break;
1385 }
1386 else { /* Compile-time error message: */
1387 OP *kid = cUNOPo->op_first;
1388 CV *cv;
1389 OP *okid;
1390
1391 if (kid->op_type == OP_PUSHMARK)
1392 goto skip_kids;
1393 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1394 Perl_croak(aTHX_
1395 "panic: unexpected lvalue entersub "
1396 "args: type/targ %ld:%ld",
1397 (long)kid->op_type,kid->op_targ);
1398 kid = kLISTOP->op_first;
1399 skip_kids:
1400 while (kid->op_sibling)
1401 kid = kid->op_sibling;
1402 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1403 /* Indirect call */
1404 if (kid->op_type == OP_METHOD_NAMED
1405 || kid->op_type == OP_METHOD)
1406 {
87d7fd28 1407 UNOP *newop;
cd06dffe
GS		 1408
1409 if (kid->op_sibling || kid->op_next != kid) {
1410 yyerror("panic: unexpected optree near method call");
1411 break;
1412 }
1413
87d7fd28 1414 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1415 newop->op_type = OP_RV2CV;
1416 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1417 newop->op_first = Nullop;
1418 newop->op_next = (OP*)newop;
1419 kid->op_sibling = (OP*)newop;
349fd7b7 1420 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1421 break;
1422 }
1c846c1f 1423
cd06dffe
GS		 1424 if (kid->op_type != OP_RV2CV)
1425 Perl_croak(aTHX_
1426 "panic: unexpected lvalue entersub "
1427 "entry via type/targ %ld:%ld",
1428 (long)kid->op_type,kid->op_targ);
1429 kid->op_private |= OPpLVAL_INTRO;
1430 break; /* Postpone until runtime */
1431 }
1432
1433 okid = kid;
1434 kid = kUNOP->op_first;
1435 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1436 kid = kUNOP->op_first;
1437 if (kid->op_type == OP_NULL)
1438 Perl_croak(aTHX_
1439 "Unexpected constant lvalue entersub "
1440 "entry via type/targ %ld:%ld",
1441 (long)kid->op_type,kid->op_targ);
1442 if (kid->op_type != OP_GV) {
1443 /* Restore RV2CV to check lvalueness */
1444 restore_2cv:
1445 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1446 okid->op_next = kid->op_next;
1447 kid->op_next = okid;
1448 }
1449 else
1450 okid->op_next = Nullop;
1451 okid->op_type = OP_RV2CV;
1452 okid->op_targ = 0;
1453 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1454 okid->op_private |= OPpLVAL_INTRO;
1455 break;
1456 }
1457
638eceb6 1458 cv = GvCV(kGVOP_gv);
1c846c1f 1459 if (!cv)
cd06dffe
GS		 1460 goto restore_2cv;
1461 if (CvLVALUE(cv))
1462 break;
1463 }
1464 }
79072805
LW		 1465 /* FALL THROUGH */
1466 default:
a0d0e21e
LW		 1467 nomod:
1468 /* grep, foreach, subcalls, refgen */
1469 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1470 break;
cea2e8a9 1471 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1472 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1473 ? "do block"
1474 : (o->op_type == OP_ENTERSUB
1475 ? "non-lvalue subroutine call"
1476 : PL_op_desc[o->op_type])),
22c35a8c 1477 type ? PL_op_desc[type] : "local"));
11343788 1478 return o;
79072805 1479
a0d0e21e
LW		 1480 case OP_PREINC:
1481 case OP_PREDEC:
1482 case OP_POW:
1483 case OP_MULTIPLY:
1484 case OP_DIVIDE:
1485 case OP_MODULO:
1486 case OP_REPEAT:
1487 case OP_ADD:
1488 case OP_SUBTRACT:
1489 case OP_CONCAT:
1490 case OP_LEFT_SHIFT:
1491 case OP_RIGHT_SHIFT:
1492 case OP_BIT_AND:
1493 case OP_BIT_XOR:
1494 case OP_BIT_OR:
1495 case OP_I_MULTIPLY:
1496 case OP_I_DIVIDE:
1497 case OP_I_MODULO:
1498 case OP_I_ADD:
1499 case OP_I_SUBTRACT:
11343788 1500 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1501 goto nomod;
3280af22 1502 PL_modcount++;
a0d0e21e
LW		 1503 break;
1504
79072805 1505 case OP_COND_EXPR:
11343788 1506 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1507 mod(kid, type);
79072805
LW		 1508 break;
1509
1510 case OP_RV2AV:
1511 case OP_RV2HV:
93af7a87 1512 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1513 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1514 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1515 PL_modcount = 10000;
11343788 1516 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1517 }
1518 /* FALL THROUGH */
79072805 1519 case OP_RV2GV:
5dc0d613 1520 if (scalar_mod_type(o, type))
3fe9a6f1 1521 goto nomod;
11343788 1522 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1523 /* FALL THROUGH */
1524 case OP_AASSIGN:
1525 case OP_ASLICE:
1526 case OP_HSLICE:
93a17b20
LW		 1527 case OP_NEXTSTATE:
1528 case OP_DBSTATE:
a0d0e21e
LW		 1529 case OP_REFGEN:
1530 case OP_CHOMP:
3280af22 1531 PL_modcount = 10000;
79072805 1532 break;
463ee0b2 1533 case OP_RV2SV:
11343788 1534 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1535 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1536 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1537 /* FALL THROUGH */
79072805 1538 case OP_GV:
463ee0b2 1539 case OP_AV2ARYLEN:
3280af22 1540 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1541 case OP_SASSIGN:
bf4b1e52
GS		 1542 case OP_ANDASSIGN:
1543 case OP_ORASSIGN:
8990e307 1544 case OP_AELEMFAST:
3280af22 1545 PL_modcount++;
8990e307
LW		 1546 break;
1547
748a9306
LW		 1548 case OP_PADAV:
1549 case OP_PADHV:
3280af22 1550 PL_modcount = 10000;
5196be3e
MB		 1551 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1552 return o; /* Treat \(@foo) like ordinary list. */
1553 if (scalar_mod_type(o, type))
3fe9a6f1 1554 goto nomod;
748a9306
LW		 1555 /* FALL THROUGH */
1556 case OP_PADSV:
3280af22 1557 PL_modcount++;
748a9306 1558 if (!type)
cea2e8a9 1559 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1560 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1561 break;
1562
554b3eca 1563#ifdef USE_THREADS
2faa37cc 1564 case OP_THREADSV:
533c011a 1565 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1566 break;
1567#endif /* USE_THREADS */
1568
748a9306
LW		 1569 case OP_PUSHMARK:
1570 break;
a0d0e21e 1571
69969c6f
SB		 1572 case OP_KEYS:
1573 if (type != OP_SASSIGN)
1574 goto nomod;
5d82c453
GA		 1575 goto lvalue_func;
1576 case OP_SUBSTR:
1577 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1578 goto nomod;
5f05dabc 1579 /* FALL THROUGH */
a0d0e21e 1580 case OP_POS:
463ee0b2 1581 case OP_VEC:
5d82c453 1582 lvalue_func:
11343788
MB		 1583 pad_free(o->op_targ);
1584 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1585 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1586 if (o->op_flags & OPf_KIDS)
1587 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1588 break;
a0d0e21e 1589
463ee0b2
LW		 1590 case OP_AELEM:
1591 case OP_HELEM:
11343788 1592 ref(cBINOPo->op_first, o->op_type);
68dc0745 1593 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1594 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1595 o->op_private |= OPpLVAL_DEFER;
3280af22 1596 PL_modcount++;
463ee0b2
LW		 1597 break;
1598
1599 case OP_SCOPE:
1600 case OP_LEAVE:
1601 case OP_ENTER:
11343788
MB		 1602 if (o->op_flags & OPf_KIDS)
1603 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1604 break;
1605
1606 case OP_NULL:
638bc118
GS		 1607 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1608 goto nomod;
1609 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1610 break;
11343788
MB		 1611 if (o->op_targ != OP_LIST) {
1612 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1613 break;
1614 }
1615 /* FALL THROUGH */
463ee0b2 1616 case OP_LIST:
11343788 1617 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1618 mod(kid, type);
1619 break;
1620 }
11343788 1621 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1622
1623 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1624 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1625 else if (!type) {
11343788
MB		 1626 o->op_private |= OPpLVAL_INTRO;
1627 o->op_flags &= ~OPf_SPECIAL;
3280af22 1628 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1629 }
a0d0e21e 1630 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1631 o->op_flags |= OPf_REF;
1632 return o;
463ee0b2
LW		 1633}
1634
864dbfa3 1635STATIC bool
cea2e8a9 1636S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1637{
1638 switch (type) {
1639 case OP_SASSIGN:
5196be3e 1640 if (o->op_type == OP_RV2GV)
3fe9a6f1 1641 return FALSE;
1642 /* FALL THROUGH */
1643 case OP_PREINC:
1644 case OP_PREDEC:
1645 case OP_POSTINC:
1646 case OP_POSTDEC:
1647 case OP_I_PREINC:
1648 case OP_I_PREDEC:
1649 case OP_I_POSTINC:
1650 case OP_I_POSTDEC:
1651 case OP_POW:
1652 case OP_MULTIPLY:
1653 case OP_DIVIDE:
1654 case OP_MODULO:
1655 case OP_REPEAT:
1656 case OP_ADD:
1657 case OP_SUBTRACT:
1658 case OP_I_MULTIPLY:
1659 case OP_I_DIVIDE:
1660 case OP_I_MODULO:
1661 case OP_I_ADD:
1662 case OP_I_SUBTRACT:
1663 case OP_LEFT_SHIFT:
1664 case OP_RIGHT_SHIFT:
1665 case OP_BIT_AND:
1666 case OP_BIT_XOR:
1667 case OP_BIT_OR:
1668 case OP_CONCAT:
1669 case OP_SUBST:
1670 case OP_TRANS:
49e9fbe6
GS		 1671 case OP_READ:
1672 case OP_SYSREAD:
1673 case OP_RECV:
bf4b1e52
GS		 1674 case OP_ANDASSIGN:
1675 case OP_ORASSIGN:
3fe9a6f1 1676 return TRUE;
1677 default:
1678 return FALSE;
1679 }
1680}
1681
35cd451c 1682STATIC bool
cea2e8a9 1683S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1684{
1685 switch (o->op_type) {
1686 case OP_PIPE_OP:
1687 case OP_SOCKPAIR:
1688 if (argnum == 2)
1689 return TRUE;
1690 /* FALL THROUGH */
1691 case OP_SYSOPEN:
1692 case OP_OPEN:
ded8aa31 1693 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1694 case OP_SOCKET:
1695 case OP_OPEN_DIR:
1696 case OP_ACCEPT:
1697 if (argnum == 1)
1698 return TRUE;
1699 /* FALL THROUGH */
1700 default:
1701 return FALSE;
1702 }
1703}
1704
463ee0b2 1705OP *
864dbfa3 1706Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1707{
1708 OP *kid;
11343788
MB		 1709 if (o && o->op_flags & OPf_KIDS) {
1710 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1711 ref(kid, type);
1712 }
11343788 1713 return o;
463ee0b2
LW		 1714}
1715
1716OP *
864dbfa3 1717Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1718{
1719 OP *kid;
463ee0b2 1720
3280af22 1721 if (!o || PL_error_count)
11343788 1722 return o;
463ee0b2 1723
11343788 1724 switch (o->op_type) {
a0d0e21e 1725 case OP_ENTERSUB:
afebc493 1726 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1727 !(o->op_flags & OPf_STACKED)) {
1728 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1729 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1730 assert(cUNOPo->op_first->op_type == OP_NULL);
1731 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1732 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1733 }
1734 break;
aeea060c 1735
463ee0b2 1736 case OP_COND_EXPR:
11343788 1737 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1738 ref(kid, type);
1739 break;
8990e307 1740 case OP_RV2SV:
35cd451c
GS		 1741 if (type == OP_DEFINED)
1742 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1743 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1744 /* FALL THROUGH */
1745 case OP_PADSV:
5f05dabc 1746 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1747 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1748 : type == OP_RV2HV ? OPpDEREF_HV
1749 : OPpDEREF_SV);
11343788 1750 o->op_flags |= OPf_MOD;
a0d0e21e 1751 }
8990e307 1752 break;
1c846c1f 1753
2faa37cc 1754 case OP_THREADSV:
a863c7d1
MB		 1755 o->op_flags |= OPf_MOD; /* XXX ??? */
1756 break;
1757
463ee0b2
LW		 1758 case OP_RV2AV:
1759 case OP_RV2HV:
aeea060c 1760 o->op_flags |= OPf_REF;
8990e307 1761 /* FALL THROUGH */
463ee0b2 1762 case OP_RV2GV:
35cd451c
GS		 1763 if (type == OP_DEFINED)
1764 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1765 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1766 break;
8990e307 1767
463ee0b2
LW		 1768 case OP_PADAV:
1769 case OP_PADHV:
aeea060c 1770 o->op_flags |= OPf_REF;
79072805 1771 break;
aeea060c 1772
8990e307 1773 case OP_SCALAR:
79072805 1774 case OP_NULL:
11343788 1775 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1776 break;
11343788 1777 ref(cBINOPo->op_first, type);
79072805
LW		 1778 break;
1779 case OP_AELEM:
1780 case OP_HELEM:
11343788 1781 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1782 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1783 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1784 : type == OP_RV2HV ? OPpDEREF_HV
1785 : OPpDEREF_SV);
11343788 1786 o->op_flags |= OPf_MOD;
8990e307 1787 }
79072805
LW		 1788 break;
1789
463ee0b2 1790 case OP_SCOPE:
79072805
LW		 1791 case OP_LEAVE:
1792 case OP_ENTER:
8990e307 1793 case OP_LIST:
11343788 1794 if (!(o->op_flags & OPf_KIDS))
79072805 1795 break;
11343788 1796 ref(cLISTOPo->op_last, type);
79072805 1797 break;
a0d0e21e
LW		 1798 default:
1799 break;
79072805 1800 }
11343788 1801 return scalar(o);
8990e307 1802
79072805
LW		 1803}
1804
09bef843
SB		 1805STATIC OP *
1806S_dup_attrlist(pTHX_ OP *o)
1807{
1808 OP *rop = Nullop;
1809
1810 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1811 * where the first kid is OP_PUSHMARK and the remaining ones
1812 * are OP_CONST. We need to push the OP_CONST values.
1813 */
1814 if (o->op_type == OP_CONST)
1815 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1816 else {
1817 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1818 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1819 if (o->op_type == OP_CONST)
1820 rop = append_elem(OP_LIST, rop,
1821 newSVOP(OP_CONST, o->op_flags,
1822 SvREFCNT_inc(cSVOPo->op_sv)));
1823 }
1824 }
1825 return rop;
1826}
1827
1828STATIC void
1829S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1830{
09bef843
SB		 1831 SV *stashsv;
1832
1833 /* fake up C<use attributes $pkg,$rv,@attrs> */
1834 ENTER; /* need to protect against side-effects of 'use' */
1835 SAVEINT(PL_expect);
1836 if (stash && HvNAME(stash))
1837 stashsv = newSVpv(HvNAME(stash), 0);
1838 else
1839 stashsv = &PL_sv_no;
e4783991 1840
09bef843 1841#define ATTRSMODULE "attributes"
e4783991
GS		 1842
1843 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1844 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1845 Nullsv,
1846 prepend_elem(OP_LIST,
1847 newSVOP(OP_CONST, 0, stashsv),
1848 prepend_elem(OP_LIST,
1849 newSVOP(OP_CONST, 0,
1850 newRV(target)),
1851 dup_attrlist(attrs))));
09bef843
SB		 1852 LEAVE;
1853}
1854
be3174d2
GS		 1855void
1856Perl_apply_attrs_string(pTHX_ char *stashpv, CV *cv,
1857 char *attrstr, STRLEN len)
1858{
1859 OP *attrs = Nullop;
1860
1861 if (!len) {
1862 len = strlen(attrstr);
1863 }
1864
1865 while (len) {
1866 for (; isSPACE(*attrstr) && len; --len, ++attrstr) ;
1867 if (len) {
1868 char *sstr = attrstr;
1869 for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ;
1870 attrs = append_elem(OP_LIST, attrs,
1871 newSVOP(OP_CONST, 0,
1872 newSVpvn(sstr, attrstr-sstr)));
1873 }
1874 }
1875
1876 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1877 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1878 Nullsv, prepend_elem(OP_LIST,
1879 newSVOP(OP_CONST, 0, newSVpv(stashpv,0)),
1880 prepend_elem(OP_LIST,
1881 newSVOP(OP_CONST, 0,
1882 newRV((SV*)cv)),
1883 attrs)));
1884}
1885
09bef843
SB		 1886STATIC OP *
1887S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1888{
1889 OP *kid;
93a17b20
LW		 1890 I32 type;
1891
3280af22 1892 if (!o || PL_error_count)
11343788 1893 return o;
93a17b20 1894
11343788 1895 type = o->op_type;
93a17b20 1896 if (type == OP_LIST) {
11343788 1897 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1898 my_kid(kid, attrs);
dab48698 1899 } else if (type == OP_UNDEF) {
7766148a 1900 return o;
77ca0c92
LW		 1901 } else if (type == OP_RV2SV || /* "our" declaration */
1902 type == OP_RV2AV ||
1903 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1904 o->op_private |= OPpOUR_INTRO;
77ca0c92 1905 return o;
dab48698 1906 } else if (type != OP_PADSV &&
93a17b20
LW		 1907 type != OP_PADAV &&
1908 type != OP_PADHV &&
1909 type != OP_PUSHMARK)
1910 {
eb64745e
GS		 1911 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1912 PL_op_desc[o->op_type],
1913 PL_in_my == KEY_our ? "our" : "my"));
11343788 1914 return o;
93a17b20 1915 }
09bef843
SB		 1916 else if (attrs && type != OP_PUSHMARK) {
1917 HV *stash;
1918 SV *padsv;
1919 SV **namesvp;
1920
eb64745e
GS		 1921 PL_in_my = FALSE;
1922 PL_in_my_stash = Nullhv;
1923
09bef843
SB		 1924 /* check for C<my Dog $spot> when deciding package */
1925 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1926 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1927 stash = SvSTASH(*namesvp);
1928 else
1929 stash = PL_curstash;
1930 padsv = PAD_SV(o->op_targ);
1931 apply_attrs(stash, padsv, attrs);
1932 }
11343788
MB		 1933 o->op_flags |= OPf_MOD;
1934 o->op_private |= OPpLVAL_INTRO;
1935 return o;
93a17b20
LW		 1936}
1937
1938OP *
09bef843
SB		 1939Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1940{
1941 if (o->op_flags & OPf_PARENS)
1942 list(o);
09bef843
SB		 1943 if (attrs)
1944 SAVEFREEOP(attrs);
eb64745e
GS		 1945 o = my_kid(o, attrs);
1946 PL_in_my = FALSE;
1947 PL_in_my_stash = Nullhv;
1948 return o;
09bef843
SB		 1949}
1950
1951OP *
1952Perl_my(pTHX_ OP *o)
1953{
1954 return my_kid(o, Nullop);
1955}
1956
1957OP *
864dbfa3 1958Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1959{
1960 if (o)
1961 o->op_flags |= OPf_PARENS;
1962 return o;
1963}
1964
1965OP *
864dbfa3 1966Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1967{
d008e5eb 1968 dTHR;
11343788 1969 OP *o;
79072805 1970
e476b1b5 1971 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1972 (left->op_type == OP_RV2AV ||
1973 left->op_type == OP_RV2HV ||
1974 left->op_type == OP_PADAV ||
1975 left->op_type == OP_PADHV)) {
22c35a8c 1976 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1977 right->op_type == OP_TRANS)
1978 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1979 const char *sample = ((left->op_type == OP_RV2AV ||
1980 left->op_type == OP_PADAV)
1981 ? "@array" : "%hash");
e476b1b5 1982 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 1983 "Applying %s to %s will act on scalar(%s)",
599cee73 1984 desc, sample, sample);
2ae324a7 1985 }
1986
de4bf5b3
MG		 1987 if (!(right->op_flags & OPf_STACKED) &&
1988 (right->op_type == OP_MATCH ||
79072805 1989 right->op_type == OP_SUBST ||
de4bf5b3 1990 right->op_type == OP_TRANS)) {
79072805 1991 right->op_flags |= OPf_STACKED;
d897a58d
MG		 1992 if (right->op_type != OP_MATCH &&
1993 ! (right->op_type == OP_TRANS &&
1994 right->op_private & OPpTRANS_IDENTICAL))
463ee0b2 1995 left = mod(left, right->op_type);
79072805 1996 if (right->op_type == OP_TRANS)
11343788 1997 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1998 else
11343788 1999 o = prepend_elem(right->op_type, scalar(left), right);
79072805 2000 if (type == OP_NOT)
11343788
MB		 2001 return newUNOP(OP_NOT, 0, scalar(o));
2002 return o;
79072805
LW		 2003 }
2004 else
2005 return bind_match(type, left,
2006 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
2007}
2008
2009OP *
864dbfa3 2010Perl_invert(pTHX_ OP *o)
79072805 2011{
11343788
MB		 2012 if (!o)
2013 return o;
79072805 2014 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 2015 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 2016}
2017
2018OP *
864dbfa3 2019Perl_scope(pTHX_ OP *o)
79072805
LW		 2020{
2021 if (o) {
3280af22 2022 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 2023 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
2024 o->op_type = OP_LEAVE;
22c35a8c 2025 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2026 }
2027 else {
2028 if (o->op_type == OP_LINESEQ) {
2029 OP *kid;
2030 o->op_type = OP_SCOPE;
22c35a8c 2031 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2032 kid = ((LISTOP*)o)->op_first;
2033 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
2034 null(kid);
463ee0b2
LW		 2035 }
2036 else
748a9306 2037 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2038 }
79072805
LW		 2039 }
2040 return o;
2041}
2042
b3ac6de7 2043void
864dbfa3 2044Perl_save_hints(pTHX)
b3ac6de7 2045{
3280af22
NIS		 2046 SAVEI32(PL_hints);
2047 SAVESPTR(GvHV(PL_hintgv));
2048 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2049 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2050}
2051
a0d0e21e 2052int
864dbfa3 2053Perl_block_start(pTHX_ int full)
79072805 2054{
11343788 2055 dTHR;
3280af22 2056 int retval = PL_savestack_ix;
b3ac6de7 2057
3280af22 2058 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2059 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2060 if (full)
2061 PL_comppad_name_fill = PL_comppad_name_floor;
2062 if (PL_comppad_name_floor < 0)
2063 PL_comppad_name_floor = 0;
3280af22
NIS		 2064 SAVEI32(PL_min_intro_pending);
2065 SAVEI32(PL_max_intro_pending);
2066 PL_min_intro_pending = 0;
2067 SAVEI32(PL_comppad_name_fill);
2068 SAVEI32(PL_padix_floor);
2069 PL_padix_floor = PL_padix;
2070 PL_pad_reset_pending = FALSE;
b3ac6de7 2071 SAVEHINTS();
3280af22 2072 PL_hints &= ~HINT_BLOCK_SCOPE;
1c846c1f 2073 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2074 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2075 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2076 SAVEFREESV(PL_compiling.cop_warnings) ;
2077 }
a0d0e21e
LW		 2078 return retval;
2079}
2080
2081OP*
864dbfa3 2082Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2083{
11343788 2084 dTHR;
3280af22 2085 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2086 OP* retval = scalarseq(seq);
a0d0e21e 2087 LEAVE_SCOPE(floor);
3280af22 2088 PL_pad_reset_pending = FALSE;
e24b16f9 2089 PL_compiling.op_private = PL_hints;
a0d0e21e 2090 if (needblockscope)
3280af22
NIS		 2091 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2092 pad_leavemy(PL_comppad_name_fill);
2093 PL_cop_seqmax++;
a0d0e21e
LW		 2094 return retval;
2095}
2096
76e3520e 2097STATIC OP *
cea2e8a9 2098S_newDEFSVOP(pTHX)
54b9620d
MB		 2099{
2100#ifdef USE_THREADS
2101 OP *o = newOP(OP_THREADSV, 0);
2102 o->op_targ = find_threadsv("_");
2103 return o;
2104#else
3280af22 2105 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2106#endif /* USE_THREADS */
2107}
2108
a0d0e21e 2109void
864dbfa3 2110Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2111{
11343788 2112 dTHR;
3280af22 2113 if (PL_in_eval) {
b295d113
TH		 2114 if (PL_eval_root)
2115 return;
faef0170
HS		 2116 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2117 ((PL_in_eval & EVAL_KEEPERR)
2118 ? OPf_SPECIAL : 0), o);
3280af22 2119 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2120 PL_eval_root->op_private |= OPpREFCOUNTED;
2121 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2122 PL_eval_root->op_next = 0;
2123 peep(PL_eval_start);
a0d0e21e
LW		 2124 }
2125 else {
5dc0d613 2126 if (!o)
a0d0e21e 2127 return;
3280af22
NIS		 2128 PL_main_root = scope(sawparens(scalarvoid(o)));
2129 PL_curcop = &PL_compiling;
2130 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2131 PL_main_root->op_private |= OPpREFCOUNTED;
2132 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2133 PL_main_root->op_next = 0;
2134 peep(PL_main_start);
2135 PL_compcv = 0;
3841441e 2136
4fdae800 2137 /* Register with debugger */
84902520 2138 if (PERLDB_INTER) {
864dbfa3 2139 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2140 if (cv) {
2141 dSP;
924508f0 2142 PUSHMARK(SP);
cc49e20b 2143 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2144 PUTBACK;
864dbfa3 2145 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2146 }
2147 }
79072805 2148 }
79072805
LW		 2149}
2150
2151OP *
864dbfa3 2152Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2153{
2154 if (o->op_flags & OPf_PARENS)
2155 list(o);
8990e307 2156 else {
d008e5eb 2157 dTHR;
599cee73 2158 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2159 char *s;
834a4ddd 2160 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2161 if (*s == ';' || *s == '=')
eb64745e
GS		 2162 Perl_warner(aTHX_ WARN_PARENTHESIS,
2163 "Parentheses missing around \"%s\" list",
2164 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2165 }
2166 }
93a17b20 2167 if (lex)
eb64745e 2168 o = my(o);
93a17b20 2169 else
eb64745e
GS		 2170 o = mod(o, OP_NULL); /* a bit kludgey */
2171 PL_in_my = FALSE;
2172 PL_in_my_stash = Nullhv;
2173 return o;
79072805
LW		 2174}
2175
2176OP *
864dbfa3 2177Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2178{
2179 if (o->op_type == OP_LIST) {
554b3eca
MB		 2180 OP *o2;
2181#ifdef USE_THREADS
2faa37cc 2182 o2 = newOP(OP_THREADSV, 0);
54b9620d 2183 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2184#else
2185 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2186#endif /* USE_THREADS */
2187 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2188 }
2189 return o;
2190}
2191
2192OP *
864dbfa3 2193Perl_fold_constants(pTHX_ register OP *o)
79072805 2194{
11343788 2195 dTHR;
79072805
LW		 2196 register OP *curop;
2197 I32 type = o->op_type;
748a9306 2198 SV *sv;
79072805 2199
22c35a8c 2200 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2201 scalar(o);
b162f9ea 2202 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2203 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2204
eac055e9
GS		 2205 /* integerize op, unless it happens to be C<-foo>.
2206 * XXX should pp_i_negate() do magic string negation instead? */
2207 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2208 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2209 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2210 {
22c35a8c 2211 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2212 }
85e6fe83 2213
22c35a8c 2214 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2215 goto nope;
2216
de939608 2217 switch (type) {
7a52d87a
GS		 2218 case OP_NEGATE:
2219 /* XXX might want a ck_negate() for this */
2220 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2221 break;
de939608
CS		 2222 case OP_SPRINTF:
2223 case OP_UCFIRST:
2224 case OP_LCFIRST:
2225 case OP_UC:
2226 case OP_LC:
69dcf70c
MB		 2227 case OP_SLT:
2228 case OP_SGT:
2229 case OP_SLE:
2230 case OP_SGE:
2231 case OP_SCMP:
2232
de939608
CS		 2233 if (o->op_private & OPpLOCALE)
2234 goto nope;
2235 }
2236
3280af22 2237 if (PL_error_count)
a0d0e21e
LW		 2238 goto nope; /* Don't try to run w/ errors */
2239
79072805 2240 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2241 if ((curop->op_type != OP_CONST ||
2242 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2243 curop->op_type != OP_LIST &&
2244 curop->op_type != OP_SCALAR &&
2245 curop->op_type != OP_NULL &&
2246 curop->op_type != OP_PUSHMARK)
2247 {
79072805
LW		 2248 goto nope;
2249 }
2250 }
2251
2252 curop = LINKLIST(o);
2253 o->op_next = 0;
533c011a 2254 PL_op = curop;
cea2e8a9 2255 CALLRUNOPS(aTHX);
3280af22 2256 sv = *(PL_stack_sp--);
748a9306 2257 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2258 pad_swipe(o->op_targ);
748a9306
LW		 2259 else if (SvTEMP(sv)) { /* grab mortal temp? */
2260 (void)SvREFCNT_inc(sv);
2261 SvTEMP_off(sv);
85e6fe83 2262 }
79072805
LW		 2263 op_free(o);
2264 if (type == OP_RV2GV)
b1cb66bf 2265 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2266 else {
ee580363
GS		 2267 /* try to smush double to int, but don't smush -2.0 to -2 */
2268 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2269 type != OP_NEGATE)
2270 {
748a9306 2271 IV iv = SvIV(sv);
65202027 2272 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2273 SvREFCNT_dec(sv);
2274 sv = newSViv(iv);
2275 }
b1cb66bf 2276 else
2277 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2278 }
2279 return newSVOP(OP_CONST, 0, sv);
2280 }
aeea060c 2281
79072805 2282 nope:
22c35a8c 2283 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2284 return o;
79072805 2285
3280af22 2286 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2287 if (type == OP_MODULO
2288 || type == OP_DIVIDE
2289 || !(o->op_flags & OPf_KIDS))
2290 {
85e6fe83 2291 return o;
4bb9f687 2292 }
85e6fe83
LW		 2293
2294 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2295 if (curop->op_type == OP_CONST) {
b1cb66bf 2296 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2297 continue;
2298 return o;
2299 }
22c35a8c 2300 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2301 continue;
2302 return o;
2303 }
22c35a8c 2304 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2305 }
2306
79072805
LW		 2307 return o;
2308}
2309
2310OP *
864dbfa3 2311Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2312{
11343788 2313 dTHR;
79072805 2314 register OP *curop;
3280af22 2315 I32 oldtmps_floor = PL_tmps_floor;
79072805 2316
a0d0e21e 2317 list(o);
3280af22 2318 if (PL_error_count)
a0d0e21e
LW		 2319 return o; /* Don't attempt to run with errors */
2320
533c011a 2321 PL_op = curop = LINKLIST(o);
a0d0e21e 2322 o->op_next = 0;
7d4045d4 2323 peep(curop);
cea2e8a9
GS		 2324 pp_pushmark();
2325 CALLRUNOPS(aTHX);
533c011a 2326 PL_op = curop;
cea2e8a9 2327 pp_anonlist();
3280af22 2328 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2329
2330 o->op_type = OP_RV2AV;
22c35a8c 2331 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2332 curop = ((UNOP*)o)->op_first;
3280af22 2333 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2334 op_free(curop);
79072805
LW		 2335 linklist(o);
2336 return list(o);
2337}
2338
2339OP *
864dbfa3 2340Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2341{
2342 OP *kid;
a0d0e21e 2343 OP *last = 0;
79072805 2344
11343788
MB		 2345 if (!o || o->op_type != OP_LIST)
2346 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2347 else
5dc0d613 2348 o->op_flags &= ~OPf_WANT;
79072805 2349
22c35a8c 2350 if (!(PL_opargs[type] & OA_MARK))
11343788 2351 null(cLISTOPo->op_first);
8990e307 2352
11343788 2353 o->op_type = type;
22c35a8c 2354 o->op_ppaddr = PL_ppaddr[type];
11343788 2355 o->op_flags |= flags;
79072805 2356
11343788
MB		 2357 o = CHECKOP(type, o);
2358 if (o->op_type != type)
2359 return o;
79072805 2360
11343788 2361 if (cLISTOPo->op_children < 7) {
79072805 2362 /* XXX do we really need to do this if we're done appending?? */
11343788 2363 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2364 last = kid;
11343788 2365 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2366 }
2367
11343788 2368 return fold_constants(o);
79072805
LW		 2369}
2370
2371/* List constructors */
2372
2373OP *
864dbfa3 2374Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2375{
2376 if (!first)
2377 return last;
8990e307
LW		 2378
2379 if (!last)
79072805 2380 return first;
8990e307 2381
155aba94
GS		 2382 if (first->op_type != type
2383 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2384 {
2385 return newLISTOP(type, 0, first, last);
2386 }
79072805 2387
a0d0e21e
LW		 2388 if (first->op_flags & OPf_KIDS)
2389 ((LISTOP*)first)->op_last->op_sibling = last;
2390 else {
2391 first->op_flags |= OPf_KIDS;
2392 ((LISTOP*)first)->op_first = last;
2393 }
2394 ((LISTOP*)first)->op_last = last;
2395 ((LISTOP*)first)->op_children++;
2396 return first;
79072805
LW		 2397}
2398
2399OP *
864dbfa3 2400Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2401{
2402 if (!first)
2403 return (OP*)last;
8990e307
LW		 2404
2405 if (!last)
79072805 2406 return (OP*)first;
8990e307
LW		 2407
2408 if (first->op_type != type)
79072805 2409 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2410
2411 if (last->op_type != type)
79072805
LW		 2412 return append_elem(type, (OP*)first, (OP*)last);
2413
2414 first->op_last->op_sibling = last->op_first;
2415 first->op_last = last->op_last;
2416 first->op_children += last->op_children;
2417 if (first->op_children)
acb74605 2418 first->op_flags |= OPf_KIDS;
1c846c1f 2419
b7dc083c
NIS		 2420#ifdef PL_OP_SLAB_ALLOC
2421#else
1c846c1f 2422 Safefree(last);
b7dc083c 2423#endif
79072805
LW		 2424 return (OP*)first;
2425}
2426
2427OP *
864dbfa3 2428Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2429{
2430 if (!first)
2431 return last;
8990e307
LW		 2432
2433 if (!last)
79072805 2434 return first;
8990e307
LW		 2435
2436 if (last->op_type == type) {
2437 if (type == OP_LIST) { /* already a PUSHMARK there */
2438 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2439 ((LISTOP*)last)->op_first->op_sibling = first;
2440 }
2441 else {
2442 if (!(last->op_flags & OPf_KIDS)) {
2443 ((LISTOP*)last)->op_last = first;
2444 last->op_flags |= OPf_KIDS;
2445 }
2446 first->op_sibling = ((LISTOP*)last)->op_first;
2447 ((LISTOP*)last)->op_first = first;
79072805 2448 }
79072805
LW		 2449 ((LISTOP*)last)->op_children++;
2450 return last;
2451 }
2452
2453 return newLISTOP(type, 0, first, last);
2454}
2455
2456/* Constructors */
2457
2458OP *
864dbfa3 2459Perl_newNULLLIST(pTHX)
79072805 2460{
8990e307
LW		 2461 return newOP(OP_STUB, 0);
2462}
2463
2464OP *
864dbfa3 2465Perl_force_list(pTHX_ OP *o)
8990e307 2466{
11343788
MB		 2467 if (!o || o->op_type != OP_LIST)
2468 o = newLISTOP(OP_LIST, 0, o, Nullop);
2469 null(o);
2470 return o;
79072805
LW		 2471}
2472
2473OP *
864dbfa3 2474Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2475{
2476 LISTOP *listop;
2477
b7dc083c 2478 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2479
2480 listop->op_type = type;
22c35a8c 2481 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2482 listop->op_children = (first != 0) + (last != 0);
2483 listop->op_flags = flags;
79072805
LW		 2484
2485 if (!last && first)
2486 last = first;
2487 else if (!first && last)
2488 first = last;
8990e307
LW		 2489 else if (first)
2490 first->op_sibling = last;
79072805
LW		 2491 listop->op_first = first;
2492 listop->op_last = last;
8990e307
LW		 2493 if (type == OP_LIST) {
2494 OP* pushop;
2495 pushop = newOP(OP_PUSHMARK, 0);
2496 pushop->op_sibling = first;
2497 listop->op_first = pushop;
2498 listop->op_flags |= OPf_KIDS;
2499 if (!last)
2500 listop->op_last = pushop;
2501 }
2502 else if (listop->op_children)
2503 listop->op_flags |= OPf_KIDS;
79072805
LW		 2504
2505 return (OP*)listop;
2506}
2507
2508OP *
864dbfa3 2509Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2510{
11343788 2511 OP *o;
b7dc083c 2512 NewOp(1101, o, 1, OP);
11343788 2513 o->op_type = type;
22c35a8c 2514 o->op_ppaddr = PL_ppaddr[type];
11343788 2515 o->op_flags = flags;
79072805 2516
11343788
MB		 2517 o->op_next = o;
2518 o->op_private = 0 + (flags >> 8);
22c35a8c 2519 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2520 scalar(o);
22c35a8c 2521 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2522 o->op_targ = pad_alloc(type, SVs_PADTMP);
2523 return CHECKOP(type, o);
79072805
LW		 2524}
2525
2526OP *
864dbfa3 2527Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2528{
2529 UNOP *unop;
2530
93a17b20 2531 if (!first)
aeea060c 2532 first = newOP(OP_STUB, 0);
22c35a8c 2533 if (PL_opargs[type] & OA_MARK)
8990e307 2534 first = force_list(first);
93a17b20 2535
b7dc083c 2536 NewOp(1101, unop, 1, UNOP);
79072805 2537 unop->op_type = type;
22c35a8c 2538 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2539 unop->op_first = first;
2540 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2541 unop->op_private = 1 | (flags >> 8);
e50aee73 2542 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2543 if (unop->op_next)
2544 return (OP*)unop;
2545
a0d0e21e 2546 return fold_constants((OP *) unop);
79072805
LW		 2547}
2548
2549OP *
864dbfa3 2550Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2551{
2552 BINOP *binop;
b7dc083c 2553 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2554
2555 if (!first)
2556 first = newOP(OP_NULL, 0);
2557
2558 binop->op_type = type;
22c35a8c 2559 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2560 binop->op_first = first;
2561 binop->op_flags = flags | OPf_KIDS;
2562 if (!last) {
2563 last = first;
c07a80fd 2564 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2565 }
2566 else {
c07a80fd 2567 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2568 first->op_sibling = last;
2569 }
2570
e50aee73 2571 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2572 if (binop->op_next || binop->op_type != type)
79072805
LW		 2573 return (OP*)binop;
2574
7284ab6f 2575 binop->op_last = binop->op_first->op_sibling;
79072805 2576
a0d0e21e 2577 return fold_constants((OP *)binop);
79072805
LW		 2578}
2579
a0ed51b3
LW		 2580static int
2581utf8compare(const void *a, const void *b)
2582{
2583 int i;
2584 for (i = 0; i < 10; i++) {
2585 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2586 return -1;
2587 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2588 return 1;
2589 }
2590 return 0;
2591}
2592
79072805 2593OP *
864dbfa3 2594Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2595{
79072805
LW		 2596 SV *tstr = ((SVOP*)expr)->op_sv;
2597 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2598 STRLEN tlen;
2599 STRLEN rlen;
ec49126f 2600 register U8 *t = (U8*)SvPV(tstr, tlen);
2601 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2602 register I32 i;
2603 register I32 j;
a0ed51b3 2604 I32 del;
79072805 2605 I32 complement;
5d06d08e 2606 I32 squash;
79072805
LW		 2607 register short *tbl;
2608
11343788 2609 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2610 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2611 squash = o->op_private & OPpTRANS_SQUASH;
1c846c1f 2612
036b4402
GS		 2613 if (SvUTF8(tstr))
2614 o->op_private |= OPpTRANS_FROM_UTF;
1c846c1f
NIS		 2615
2616 if (SvUTF8(rstr))
036b4402 2617 o->op_private |= OPpTRANS_TO_UTF;
79072805 2618
a0ed51b3 2619 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2620 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2621 SV* transv = 0;
2622 U8* tend = t + tlen;
2623 U8* rend = r + rlen;
ba210ebe 2624 STRLEN ulen;
a0ed51b3
LW		 2625 U32 tfirst = 1;
2626 U32 tlast = 0;
2627 I32 tdiff;
2628 U32 rfirst = 1;
2629 U32 rlast = 0;
2630 I32 rdiff;
2631 I32 diff;
2632 I32 none = 0;
2633 U32 max = 0;
2634 I32 bits;
2635 I32 grows = 0;
2636 I32 havefinal = 0;
2637 U32 final;
a0ed51b3
LW		 2638 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2639 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2640
2641 if (complement) {
806e7201 2642 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3 2643 U8** cp;
ba210ebe 2644 I32* cl;
a0ed51b3
LW		 2645 UV nextmin = 0;
2646 New(1109, cp, tlen, U8*);
2647 i = 0;
79cb57f6 2648 transv = newSVpvn("",0);
a0ed51b3
LW		 2649 while (t < tend) {
2650 cp[i++] = t;
2651 t += UTF8SKIP(t);
2652 if (*t == 0xff) {
2653 t++;
2654 t += UTF8SKIP(t);
2655 }
2656 }
2657 qsort(cp, i, sizeof(U8*), utf8compare);
2658 for (j = 0; j < i; j++) {
2659 U8 *s = cp[j];
ba210ebe 2660 I32 cur = j < i ? cp[j+1] - s : tend - s;
dcad2880 2661 UV val = utf8_to_uv(s, cur, &ulen, 0);
a0ed51b3
LW		 2662 s += ulen;
2663 diff = val - nextmin;
2664 if (diff > 0) {
2665 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2666 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2667 if (diff > 1) {
2668 t = uv_to_utf8(tmpbuf, val - 1);
2669 sv_catpvn(transv, "\377", 1);
dfe13c55 2670 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2671 }
2672 }
2673 if (*s == 0xff)
dcad2880 2674 val = utf8_to_uv(s+1, cur - 1, &ulen, 0);
a0ed51b3
LW		 2675 if (val >= nextmin)
2676 nextmin = val + 1;
2677 }
2678 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2679 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2680 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2681 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2682 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2683 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2684 tlen = SvCUR(transv);
2685 tend = t + tlen;
2686 }
2687 else if (!rlen && !del) {
2688 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2689 }
2690 if (!squash) {
12ae5dfc
JH		 2691 if (t == r ||
2692 (tlen == rlen && memEQ((char *)t, (char *)r, tlen)))
01ec43d0 2693 {
4757a243 2694 o->op_private |= OPpTRANS_IDENTICAL;
01ec43d0 2695 }
a0ed51b3
LW		 2696 }
2697
2698 while (t < tend || tfirst <= tlast) {
2699 /* see if we need more "t" chars */
2700 if (tfirst > tlast) {
dcad2880 2701 tfirst = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2702 t += ulen;
2703 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2704 t++;
dcad2880 2705 tlast = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2706 t += ulen;
2707 }
2708 else
2709 tlast = tfirst;
2710 }
2711
2712 /* now see if we need more "r" chars */
2713 if (rfirst > rlast) {
2714 if (r < rend) {
dcad2880 2715 rfirst = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2716 r += ulen;
2717 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2718 r++;
dcad2880 2719 rlast = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2720 r += ulen;
2721 }
2722 else
2723 rlast = rfirst;
2724 }
2725 else {
2726 if (!havefinal++)
2727 final = rlast;
2728 rfirst = rlast = 0xffffffff;
2729 }
2730 }
2731
2732 /* now see which range will peter our first, if either. */
2733 tdiff = tlast - tfirst;
2734 rdiff = rlast - rfirst;
2735
2736 if (tdiff <= rdiff)
2737 diff = tdiff;
2738 else
2739 diff = rdiff;
2740
2741 if (rfirst == 0xffffffff) {
2742 diff = tdiff; /* oops, pretend rdiff is infinite */
2743 if (diff > 0)
894356b3
GS		 2744 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2745 (long)tfirst, (long)tlast);
a0ed51b3 2746 else
894356b3 2747 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2748 }
2749 else {
2750 if (diff > 0)
894356b3
GS		 2751 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2752 (long)tfirst, (long)(tfirst + diff),
2753 (long)rfirst);
a0ed51b3 2754 else
894356b3
GS		 2755 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2756 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2757
2758 if (rfirst + diff > max)
2759 max = rfirst + diff;
2760 rfirst += diff + 1;
2761 if (!grows) {
2762 if (rfirst <= 0x80)
2763 ;
2764 else if (rfirst <= 0x800)
2765 grows |= (tfirst < 0x80);
2766 else if (rfirst <= 0x10000)
2767 grows |= (tfirst < 0x800);
2768 else if (rfirst <= 0x200000)
2769 grows |= (tfirst < 0x10000);
2770 else if (rfirst <= 0x4000000)
2771 grows |= (tfirst < 0x200000);
2772 else if (rfirst <= 0x80000000)
2773 grows |= (tfirst < 0x4000000);
2774 }
2775 }
2776 tfirst += diff + 1;
2777 }
2778
2779 none = ++max;
2780 if (del)
2781 del = ++max;
2782
2783 if (max > 0xffff)
2784 bits = 32;
2785 else if (max > 0xff)
2786 bits = 16;
2787 else
2788 bits = 8;
2789
2790 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2791 SvREFCNT_dec(listsv);
2792 if (transv)
2793 SvREFCNT_dec(transv);
2794
2795 if (!del && havefinal)
b448e4fe
JH		 2796 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2797 newSVuv((UV)final), 0);
a0ed51b3
LW		 2798
2799 if (grows && to_utf)
2800 o->op_private |= OPpTRANS_GROWS;
2801
2802 op_free(expr);
2803 op_free(repl);
2804 return o;
2805 }
2806
2807 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2808 if (complement) {
2809 Zero(tbl, 256, short);
2810 for (i = 0; i < tlen; i++)
ec49126f 2811 tbl[t[i]] = -1;
79072805
LW		 2812 for (i = 0, j = 0; i < 256; i++) {
2813 if (!tbl[i]) {
2814 if (j >= rlen) {
a0ed51b3 2815 if (del)
79072805
LW		 2816 tbl[i] = -2;
2817 else if (rlen)
ec49126f 2818 tbl[i] = r[j-1];
79072805
LW		 2819 else
2820 tbl[i] = i;
2821 }
2822 else
ec49126f 2823 tbl[i] = r[j++];
79072805
LW		 2824 }
2825 }
2826 }
2827 else {
a0ed51b3 2828 if (!rlen && !del) {
79072805 2829 r = t; rlen = tlen;
5d06d08e 2830 if (!squash)
4757a243 2831 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2832 }
2833 for (i = 0; i < 256; i++)
2834 tbl[i] = -1;
2835 for (i = 0, j = 0; i < tlen; i++,j++) {
2836 if (j >= rlen) {
a0ed51b3 2837 if (del) {
ec49126f 2838 if (tbl[t[i]] == -1)
2839 tbl[t[i]] = -2;
79072805
LW		 2840 continue;
2841 }
2842 --j;
2843 }
ec49126f 2844 if (tbl[t[i]] == -1)
2845 tbl[t[i]] = r[j];
79072805
LW		 2846 }
2847 }
2848 op_free(expr);
2849 op_free(repl);
2850
11343788 2851 return o;
79072805
LW		 2852}
2853
2854OP *
864dbfa3 2855Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2856{
11343788 2857 dTHR;
79072805
LW		 2858 PMOP *pmop;
2859
b7dc083c 2860 NewOp(1101, pmop, 1, PMOP);
79072805 2861 pmop->op_type = type;
22c35a8c 2862 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2863 pmop->op_flags = flags;
c07a80fd 2864 pmop->op_private = 0 | (flags >> 8);
79072805 2865
3280af22 2866 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2867 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2868 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2869 pmop->op_pmpermflags |= PMf_LOCALE;
2870 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2871
79072805 2872 /* link into pm list */
3280af22
NIS		 2873 if (type != OP_TRANS && PL_curstash) {
2874 pmop->op_pmnext = HvPMROOT(PL_curstash);
2875 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2876 }
2877
2878 return (OP*)pmop;
2879}
2880
2881OP *
864dbfa3 2882Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2883{
5c0ca799 2884 dTHR;
79072805
LW		 2885 PMOP *pm;
2886 LOGOP *rcop;
ce862d02 2887 I32 repl_has_vars = 0;
79072805 2888
11343788
MB		 2889 if (o->op_type == OP_TRANS)
2890 return pmtrans(o, expr, repl);
79072805 2891
3280af22 2892 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2893 pm = (PMOP*)o;
79072805
LW		 2894
2895 if (expr->op_type == OP_CONST) {
463ee0b2 2896 STRLEN plen;
79072805 2897 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2898 char *p = SvPV(pat, plen);
11343788 2899 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2900 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2901 p = SvPV(pat, plen);
79072805
LW		 2902 pm->op_pmflags |= PMf_SKIPWHITE;
2903 }
393fec97 2904 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2905 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2906 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2907 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2908 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2909 op_free(expr);
2910 }
2911 else {
393fec97
GS		 2912 if (PL_hints & HINT_UTF8)
2913 pm->op_pmdynflags |= PMdf_UTF8;
3280af22 2914 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
1c846c1f 2915 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2916 ? OP_REGCRESET
2917 : OP_REGCMAYBE),0,expr);
463ee0b2 2918
b7dc083c 2919 NewOp(1101, rcop, 1, LOGOP);
79072805 2920 rcop->op_type = OP_REGCOMP;
22c35a8c 2921 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2922 rcop->op_first = scalar(expr);
1c846c1f 2923 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2924 ? (OPf_SPECIAL | OPf_KIDS)
2925 : OPf_KIDS);
79072805 2926 rcop->op_private = 1;
11343788 2927 rcop->op_other = o;
79072805
LW		 2928
2929 /* establish postfix order */
3280af22 2930 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2931 LINKLIST(expr);
2932 rcop->op_next = expr;
2933 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2934 }
2935 else {
2936 rcop->op_next = LINKLIST(expr);
2937 expr->op_next = (OP*)rcop;
2938 }
79072805 2939
11343788 2940 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2941 }
2942
2943 if (repl) {
748a9306 2944 OP *curop;
0244c3a4 2945 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2946 curop = 0;
57843af0
GS		 2947 if (CopLINE(PL_curcop) < PL_multi_end)
2948 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2949 }
554b3eca 2950#ifdef USE_THREADS
2faa37cc 2951 else if (repl->op_type == OP_THREADSV
554b3eca 2952 && strchr("&`'123456789+",
533c011a 2953 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2954 {
2955 curop = 0;
2956 }
2957#endif /* USE_THREADS */
748a9306
LW		 2958 else if (repl->op_type == OP_CONST)
2959 curop = repl;
79072805 2960 else {
79072805
LW		 2961 OP *lastop = 0;
2962 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2963 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2964#ifdef USE_THREADS
ce862d02
IZ		 2965 if (curop->op_type == OP_THREADSV) {
2966 repl_has_vars = 1;
be949f6f 2967 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2968 break;
554b3eca
MB		 2969 }
2970#else
79072805 2971 if (curop->op_type == OP_GV) {
638eceb6 2972 GV *gv = cGVOPx_gv(curop);
ce862d02 2973 repl_has_vars = 1;
93a17b20 2974 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2975 break;
2976 }
554b3eca 2977#endif /* USE_THREADS */
79072805
LW		 2978 else if (curop->op_type == OP_RV2CV)
2979 break;
2980 else if (curop->op_type == OP_RV2SV ||
2981 curop->op_type == OP_RV2AV ||
2982 curop->op_type == OP_RV2HV ||
2983 curop->op_type == OP_RV2GV) {
2984 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2985 break;
2986 }
748a9306
LW		 2987 else if (curop->op_type == OP_PADSV ||
2988 curop->op_type == OP_PADAV ||
2989 curop->op_type == OP_PADHV ||
554b3eca 2990 curop->op_type == OP_PADANY) {
ce862d02 2991 repl_has_vars = 1;
748a9306 2992 }
1167e5da
SM		 2993 else if (curop->op_type == OP_PUSHRE)
2994 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2995 else
2996 break;
2997 }
2998 lastop = curop;
2999 }
748a9306 3000 }
ce862d02 3001 if (curop == repl
1c846c1f
NIS		 3002 && !(repl_has_vars
3003 && (!pm->op_pmregexp
ce862d02 3004 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 3005 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 3006 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 3007 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 3008 }
3009 else {
ce862d02
IZ		 3010 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
3011 pm->op_pmflags |= PMf_MAYBE_CONST;
3012 pm->op_pmpermflags |= PMf_MAYBE_CONST;
3013 }
b7dc083c 3014 NewOp(1101, rcop, 1, LOGOP);
748a9306 3015 rcop->op_type = OP_SUBSTCONT;
22c35a8c 3016 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 3017 rcop->op_first = scalar(repl);
3018 rcop->op_flags |= OPf_KIDS;
3019 rcop->op_private = 1;
11343788 3020 rcop->op_other = o;
748a9306
LW		 3021
3022 /* establish postfix order */
3023 rcop->op_next = LINKLIST(repl);
3024 repl->op_next = (OP*)rcop;
3025
3026 pm->op_pmreplroot = scalar((OP*)rcop);
3027 pm->op_pmreplstart = LINKLIST(rcop);
3028 rcop->op_next = 0;
79072805
LW		 3029 }
3030 }
3031
3032 return (OP*)pm;
3033}
3034
3035OP *
864dbfa3 3036Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3037{
3038 SVOP *svop;
b7dc083c 3039 NewOp(1101, svop, 1, SVOP);
79072805 3040 svop->op_type = type;
22c35a8c 3041 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3042 svop->op_sv = sv;
3043 svop->op_next = (OP*)svop;
3044 svop->op_flags = flags;
22c35a8c 3045 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3046 scalar((OP*)svop);
22c35a8c 3047 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3048 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3049 return CHECKOP(type, svop);
79072805
LW		 3050}
3051
3052OP *
350de78d
GS		 3053Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3054{
3055 PADOP *padop;
3056 NewOp(1101, padop, 1, PADOP);
3057 padop->op_type = type;
3058 padop->op_ppaddr = PL_ppaddr[type];
3059 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3060 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3061 PL_curpad[padop->op_padix] = sv;
7766f137 3062 SvPADTMP_on(sv);
350de78d
GS		 3063 padop->op_next = (OP*)padop;
3064 padop->op_flags = flags;
3065 if (PL_opargs[type] & OA_RETSCALAR)
3066 scalar((OP*)padop);
3067 if (PL_opargs[type] & OA_TARGET)
3068 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3069 return CHECKOP(type, padop);
3070}
3071
3072OP *
864dbfa3 3073Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3074{
11343788 3075 dTHR;
350de78d 3076#ifdef USE_ITHREADS
743e66e6 3077 GvIN_PAD_on(gv);
350de78d
GS		 3078 return newPADOP(type, flags, SvREFCNT_inc(gv));
3079#else
7934575e 3080 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3081#endif
79072805
LW		 3082}
3083
3084OP *
864dbfa3 3085Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3086{
3087 PVOP *pvop;
b7dc083c 3088 NewOp(1101, pvop, 1, PVOP);
79072805 3089 pvop->op_type = type;
22c35a8c 3090 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3091 pvop->op_pv = pv;
3092 pvop->op_next = (OP*)pvop;
3093 pvop->op_flags = flags;
22c35a8c 3094 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3095 scalar((OP*)pvop);
22c35a8c 3096 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3097 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3098 return CHECKOP(type, pvop);
79072805
LW		 3099}
3100
79072805 3101void
864dbfa3 3102Perl_package(pTHX_ OP *o)
79072805 3103{
11343788 3104 dTHR;
93a17b20 3105 SV *sv;
79072805 3106
3280af22
NIS		 3107 save_hptr(&PL_curstash);
3108 save_item(PL_curstname);
11343788 3109 if (o) {
463ee0b2
LW		 3110 STRLEN len;
3111 char *name;
11343788 3112 sv = cSVOPo->op_sv;
463ee0b2 3113 name = SvPV(sv, len);
3280af22
NIS		 3114 PL_curstash = gv_stashpvn(name,len,TRUE);
3115 sv_setpvn(PL_curstname, name, len);
11343788 3116 op_free(o);
93a17b20
LW		 3117 }
3118 else {
3280af22
NIS		 3119 sv_setpv(PL_curstname,"<none>");
3120 PL_curstash = Nullhv;
93a17b20 3121 }
7ad382f4 3122 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3123 PL_copline = NOLINE;
3124 PL_expect = XSTATE;
79072805
LW		 3125}
3126
85e6fe83 3127void
864dbfa3 3128Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3129{
a0d0e21e 3130 OP *pack;
a0d0e21e
LW		 3131 OP *rqop;
3132 OP *imop;
b1cb66bf 3133 OP *veop;
78ca652e 3134 GV *gv;
85e6fe83 3135
a0d0e21e 3136 if (id->op_type != OP_CONST)
cea2e8a9 3137 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3138
b1cb66bf 3139 veop = Nullop;
3140
0f79a09d 3141 if (version != Nullop) {
b1cb66bf 3142 SV *vesv = ((SVOP*)version)->op_sv;
3143
44dcb63b 3144 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3145 arg = version;
3146 }
3147 else {
3148 OP *pack;
0f79a09d 3149 SV *meth;
b1cb66bf 3150
44dcb63b 3151 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3152 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3153
3154 /* Make copy of id so we don't free it twice */
3155 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3156
3157 /* Fake up a method call to VERSION */
0f79a09d
GS		 3158 meth = newSVpvn("VERSION",7);
3159 sv_upgrade(meth, SVt_PVIV);
155aba94 3160 (void)SvIOK_on(meth);
0f79a09d 3161 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3162 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3163 append_elem(OP_LIST,
0f79a09d
GS		 3164 prepend_elem(OP_LIST, pack, list(version)),
3165 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3166 }
3167 }
aeea060c 3168
a0d0e21e 3169 /* Fake up an import/unimport */
4633a7c4
LW		 3170 if (arg && arg->op_type == OP_STUB)
3171 imop = arg; /* no import on explicit () */
44dcb63b 3172 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3173 imop = Nullop; /* use 5.0; */
3174 }
4633a7c4 3175 else {
0f79a09d
GS		 3176 SV *meth;
3177
4633a7c4
LW		 3178 /* Make copy of id so we don't free it twice */
3179 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3180
3181 /* Fake up a method call to import/unimport */
3182 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3183 sv_upgrade(meth, SVt_PVIV);
155aba94 3184 (void)SvIOK_on(meth);
0f79a09d 3185 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3186 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3187 append_elem(OP_LIST,
3188 prepend_elem(OP_LIST, pack, list(arg)),
3189 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3190 }
3191
78ca652e
GS		 3192 /* Fake up a require, handle override, if any */
3193 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3194 if (!(gv && GvIMPORTED_CV(gv)))
3195 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3196
3197 if (gv && GvIMPORTED_CV(gv)) {
3198 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3199 append_elem(OP_LIST, id,
3200 scalar(newUNOP(OP_RV2CV, 0,
3201 newGVOP(OP_GV, 0,
3202 gv))))));
3203 }
3204 else {
3205 rqop = newUNOP(OP_REQUIRE, 0, id);
3206 }
a0d0e21e
LW		 3207
3208 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3209 newATTRSUB(floor,
79cb57f6 3210 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3211 Nullop,
09bef843 3212 Nullop,
a0d0e21e 3213 append_elem(OP_LINESEQ,
b1cb66bf 3214 append_elem(OP_LINESEQ,
3215 newSTATEOP(0, Nullch, rqop),
3216 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3217 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3218
c305c6a0 3219 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3220 PL_copline = NOLINE;
3221 PL_expect = XSTATE;
85e6fe83
LW		 3222}
3223
e4783991
GS		 3224void
3225Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3226{
3227 va_list args;
3228 va_start(args, ver);
3229 vload_module(flags, name, ver, &args);
3230 va_end(args);
3231}
3232
3233#ifdef PERL_IMPLICIT_CONTEXT
3234void
3235Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3236{
3237 dTHX;
3238 va_list args;
3239 va_start(args, ver);
3240 vload_module(flags, name, ver, &args);
3241 va_end(args);
3242}
3243#endif
3244
3245void
3246Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3247{
3248 OP *modname, *veop, *imop;
3249
3250 modname = newSVOP(OP_CONST, 0, name);
3251 modname->op_private |= OPpCONST_BARE;
3252 if (ver) {
3253 veop = newSVOP(OP_CONST, 0, ver);
3254 }
3255 else
3256 veop = Nullop;
3257 if (flags & PERL_LOADMOD_NOIMPORT) {
3258 imop = sawparens(newNULLLIST());
3259 }
3260 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3261 imop = va_arg(*args, OP*);
3262 }
3263 else {
3264 SV *sv;
3265 imop = Nullop;
3266 sv = va_arg(*args, SV*);
3267 while (sv) {
3268 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3269 sv = va_arg(*args, SV*);
3270 }
3271 }
81885997
GS		 3272 {
3273 line_t ocopline = PL_copline;
3274 int oexpect = PL_expect;
3275
3276 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3277 veop, modname, imop);
3278 PL_expect = oexpect;
3279 PL_copline = ocopline;
3280 }
e4783991
GS		 3281}
3282
79072805 3283OP *
864dbfa3 3284Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3285{
3286 OP *doop;
3287 GV *gv;
3288
3289 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3290 if (!(gv && GvIMPORTED_CV(gv)))
3291 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3292
3293 if (gv && GvIMPORTED_CV(gv)) {
3294 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3295 append_elem(OP_LIST, term,
3296 scalar(newUNOP(OP_RV2CV, 0,
3297 newGVOP(OP_GV, 0,
3298 gv))))));
3299 }
3300 else {
3301 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3302 }
3303 return doop;
3304}
3305
3306OP *
864dbfa3 3307Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3308{
3309 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3310 list(force_list(subscript)),
3311 list(force_list(listval)) );
79072805
LW		 3312}
3313
76e3520e 3314STATIC I32
cea2e8a9 3315S_list_assignment(pTHX_ register OP *o)
79072805 3316{
11343788 3317 if (!o)
79072805
LW		 3318 return TRUE;
3319
11343788
MB		 3320 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3321 o = cUNOPo->op_first;
79072805 3322
11343788 3323 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3324 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3325 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3326
3327 if (t && f)
3328 return TRUE;
3329 if (t || f)
3330 yyerror("Assignment to both a list and a scalar");
3331 return FALSE;
3332 }
3333
11343788
MB		 3334 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3335 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3336 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3337 return TRUE;
3338
11343788 3339 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3340 return TRUE;
3341
11343788 3342 if (o->op_type == OP_RV2SV)
79072805
LW		 3343 return FALSE;
3344
3345 return FALSE;
3346}
3347
3348OP *
864dbfa3 3349Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3350{
11343788 3351 OP *o;
79072805 3352
a0d0e21e
LW		 3353 if (optype) {
3354 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3355 return newLOGOP(optype, 0,
3356 mod(scalar(left), optype),
3357 newUNOP(OP_SASSIGN, 0, scalar(right)));
3358 }
3359 else {
3360 return newBINOP(optype, OPf_STACKED,
3361 mod(scalar(left), optype), scalar(right));
3362 }
3363 }
3364
79072805 3365 if (list_assignment(left)) {
6ee623d5 3366 dTHR;
10c8fecd
GS		 3367 OP *curop;
3368
3280af22
NIS		 3369 PL_modcount = 0;
3370 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3371 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3372 if (PL_eval_start)
3373 PL_eval_start = 0;
748a9306 3374 else {
a0d0e21e
LW		 3375 op_free(left);
3376 op_free(right);
3377 return Nullop;
3378 }
10c8fecd
GS		 3379 curop = list(force_list(left));
3380 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3381 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3382 for (curop = ((LISTOP*)curop)->op_first;
3383 curop; curop = curop->op_sibling)
3384 {
3385 if (curop->op_type == OP_RV2HV &&
3386 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3387 o->op_private |= OPpASSIGN_HASH;
3388 break;
3389 }
3390 }
a0d0e21e 3391 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3392 OP *lastop = o;
3280af22 3393 PL_generation++;
11343788 3394 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3395 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3396 if (curop->op_type == OP_GV) {
638eceb6 3397 GV *gv = cGVOPx_gv(curop);
3280af22 3398 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3399 break;
3280af22 3400 SvCUR(gv) = PL_generation;
79072805 3401 }
748a9306
LW		 3402 else if (curop->op_type == OP_PADSV ||
3403 curop->op_type == OP_PADAV ||
3404 curop->op_type == OP_PADHV ||
3405 curop->op_type == OP_PADANY) {
3280af22 3406 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3407 SV *sv = svp[curop->op_targ];
3280af22 3408 if (SvCUR(sv) == PL_generation)
748a9306 3409 break;
3280af22 3410 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3411 }
79072805
LW		 3412 else if (curop->op_type == OP_RV2CV)
3413 break;
3414 else if (curop->op_type == OP_RV2SV ||
3415 curop->op_type == OP_RV2AV ||
3416 curop->op_type == OP_RV2HV ||
3417 curop->op_type == OP_RV2GV) {
3418 if (lastop->op_type != OP_GV) /* funny deref? */
3419 break;
3420 }
1167e5da
SM		 3421 else if (curop->op_type == OP_PUSHRE) {
3422 if (((PMOP*)curop)->op_pmreplroot) {
b3f5893f
GS		 3423#ifdef USE_ITHREADS
3424 GV *gv = (GV*)PL_curpad[(PADOFFSET)((PMOP*)curop)->op_pmreplroot];
3425#else
1167e5da 3426 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
b3f5893f 3427#endif
3280af22 3428 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3429 break;
3280af22 3430 SvCUR(gv) = PL_generation;
1167e5da
SM		 3431 }
3432 }
79072805
LW		 3433 else
3434 break;
3435 }
3436 lastop = curop;
3437 }
11343788 3438 if (curop != o)
10c8fecd 3439 o->op_private |= OPpASSIGN_COMMON;
79072805 3440 }
c07a80fd 3441 if (right && right->op_type == OP_SPLIT) {
3442 OP* tmpop;
3443 if ((tmpop = ((LISTOP*)right)->op_first) &&
3444 tmpop->op_type == OP_PUSHRE)
3445 {
3446 PMOP *pm = (PMOP*)tmpop;
3447 if (left->op_type == OP_RV2AV &&
3448 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3449 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3450 {
3451 tmpop = ((UNOP*)left)->op_first;
3452 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3453#ifdef USE_ITHREADS
3454 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3455 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3456#else
3457 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3458 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3459#endif
c07a80fd 3460 pm->op_pmflags |= PMf_ONCE;
11343788 3461 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3462 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3463 tmpop->op_sibling = Nullop; /* don't free split */
3464 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3465 op_free(o); /* blow off assign */
54310121 3466 right->op_flags &= ~OPf_WANT;
a5f75d66 3467 /* "I don't know and I don't care." */
c07a80fd 3468 return right;
3469 }
3470 }
3471 else {
3280af22 3472 if (PL_modcount < 10000 &&
c07a80fd 3473 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3474 {
3475 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3476 if (SvIVX(sv) == 0)
3280af22 3477 sv_setiv(sv, PL_modcount+1);
c07a80fd 3478 }
3479 }
3480 }
3481 }
11343788 3482 return o;
79072805
LW		 3483 }
3484 if (!right)
3485 right = newOP(OP_UNDEF, 0);
3486 if (right->op_type == OP_READLINE) {
3487 right->op_flags |= OPf_STACKED;
463ee0b2 3488 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3489 }
a0d0e21e 3490 else {
3280af22 3491 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3492 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3493 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3494 if (PL_eval_start)
3495 PL_eval_start = 0;
748a9306 3496 else {
11343788 3497 op_free(o);
a0d0e21e
LW		 3498 return Nullop;
3499 }
3500 }
11343788 3501 return o;
79072805
LW		 3502}
3503
3504OP *
864dbfa3 3505Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3506{
11343788 3507 dTHR;
bbce6d69 3508 U32 seq = intro_my();
79072805
LW		 3509 register COP *cop;
3510
b7dc083c 3511 NewOp(1101, cop, 1, COP);
57843af0 3512 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3513 cop->op_type = OP_DBSTATE;
22c35a8c 3514 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3515 }
3516 else {
3517 cop->op_type = OP_NEXTSTATE;
22c35a8c 3518 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3519 }
79072805 3520 cop->op_flags = flags;
393fec97 3521 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3522#ifdef NATIVE_HINTS
3523 cop->op_private |= NATIVE_HINTS;
3524#endif
e24b16f9 3525 PL_compiling.op_private = cop->op_private;
79072805
LW		 3526 cop->op_next = (OP*)cop;
3527
463ee0b2
LW		 3528 if (label) {
3529 cop->cop_label = label;
3280af22 3530 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3531 }
bbce6d69 3532 cop->cop_seq = seq;
3280af22 3533 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3534 if (specialWARN(PL_curcop->cop_warnings))
599cee73 3535 cop->cop_warnings = PL_curcop->cop_warnings ;
1c846c1f 3536 else
599cee73
PM		 3537 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3538
79072805 3539
3280af22 3540 if (PL_copline == NOLINE)
57843af0 3541 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3542 else {
57843af0 3543 CopLINE_set(cop, PL_copline);
3280af22 3544 PL_copline = NOLINE;
79072805 3545 }
57843af0 3546#ifdef USE_ITHREADS
f4dd75d9 3547 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */
57843af0 3548#else
f4dd75d9 3549 CopFILEGV_set(cop, CopFILEGV(PL_curcop));
57843af0 3550#endif
11faa288 3551 CopSTASH_set(cop, PL_curstash);
79072805 3552
3280af22 3553 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3554 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3555 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3556 (void)SvIOK_on(*svp);
57b2e452 3557 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3558 }
3559 }
3560
11343788 3561 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3562}
3563
bbce6d69 3564/* "Introduce" my variables to visible status. */
3565U32
864dbfa3 3566Perl_intro_my(pTHX)
bbce6d69 3567{
3568 SV **svp;
3569 SV *sv;
3570 I32 i;
3571
3280af22
NIS		 3572 if (! PL_min_intro_pending)
3573 return PL_cop_seqmax;
bbce6d69 3574
3280af22
NIS		 3575 svp = AvARRAY(PL_comppad_name);
3576 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3577 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3578 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3579 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3580 }
3581 }
3280af22
NIS		 3582 PL_min_intro_pending = 0;
3583 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3584 return PL_cop_seqmax++;
bbce6d69 3585}
3586
79072805 3587OP *
864dbfa3 3588Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3589{
883ffac3
CS		 3590 return new_logop(type, flags, &first, &other);
3591}
3592
3bd495df 3593STATIC OP *
cea2e8a9 3594S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3595{
11343788 3596 dTHR;
79072805 3597 LOGOP *logop;
11343788 3598 OP *o;
883ffac3
CS		 3599 OP *first = *firstp;
3600 OP *other = *otherp;
79072805 3601
a0d0e21e
LW		 3602 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3603 return newBINOP(type, flags, scalar(first), scalar(other));
3604
8990e307 3605 scalarboolean(first);
79072805
LW		 3606 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3607 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3608 if (type == OP_AND || type == OP_OR) {
3609 if (type == OP_AND)
3610 type = OP_OR;
3611 else
3612 type = OP_AND;
11343788 3613 o = first;
883ffac3 3614 first = *firstp = cUNOPo->op_first;
11343788
MB		 3615 if (o->op_next)
3616 first->op_next = o->op_next;
3617 cUNOPo->op_first = Nullop;
3618 op_free(o);
79072805
LW		 3619 }
3620 }
3621 if (first->op_type == OP_CONST) {
4673fc70 3622 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
1c846c1f 3623 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3624 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3625 op_free(first);
883ffac3 3626 *firstp = Nullop;
79072805
LW		 3627 return other;
3628 }
3629 else {
3630 op_free(other);
883ffac3 3631 *otherp = Nullop;
79072805
LW		 3632 return first;
3633 }
3634 }
3635 else if (first->op_type == OP_WANTARRAY) {
3636 if (type == OP_AND)
3637 list(other);
3638 else
3639 scalar(other);
3640 }
e476b1b5 3641 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3642 OP *k1 = ((UNOP*)first)->op_first;
3643 OP *k2 = k1->op_sibling;
3644 OPCODE warnop = 0;
3645 switch (first->op_type)
3646 {
3647 case OP_NULL:
3648 if (k2 && k2->op_type == OP_READLINE
3649 && (k2->op_flags & OPf_STACKED)
1c846c1f 3650 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3651 {
a6006777 3652 warnop = k2->op_type;
72b16652 3653 }
a6006777 3654 break;
3655
3656 case OP_SASSIGN:
68dc0745 3657 if (k1->op_type == OP_READDIR
3658 || k1->op_type == OP_GLOB
72b16652 3659 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3660 || k1->op_type == OP_EACH)
72b16652
GS		 3661 {
3662 warnop = ((k1->op_type == OP_NULL)
3663 ? k1->op_targ : k1->op_type);
3664 }
a6006777 3665 break;
3666 }
8ebc5c01 3667 if (warnop) {
57843af0
GS		 3668 line_t oldline = CopLINE(PL_curcop);
3669 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3670 Perl_warner(aTHX_ WARN_MISC,
599cee73 3671 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3672 PL_op_desc[warnop],
68dc0745 3673 ((warnop == OP_READLINE || warnop == OP_GLOB)
3674 ? " construct" : "() operator"));
57843af0 3675 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3676 }
a6006777 3677 }
79072805
LW		 3678
3679 if (!other)
3680 return first;
3681
a0d0e21e
LW		 3682 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3683 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3684
b7dc083c 3685 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3686
3687 logop->op_type = type;
22c35a8c 3688 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3689 logop->op_first = first;
3690 logop->op_flags = flags | OPf_KIDS;
3691 logop->op_other = LINKLIST(other);
c07a80fd 3692 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3693
3694 /* establish postfix order */
3695 logop->op_next = LINKLIST(first);
3696 first->op_next = (OP*)logop;
3697 first->op_sibling = other;
3698
11343788
MB		 3699 o = newUNOP(OP_NULL, 0, (OP*)logop);
3700 other->op_next = o;
79072805 3701
11343788 3702 return o;
79072805
LW		 3703}
3704
3705OP *
864dbfa3 3706Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3707{
11343788 3708 dTHR;
1a67a97c
SM		 3709 LOGOP *logop;
3710 OP *start;
11343788 3711 OP *o;
79072805 3712
b1cb66bf 3713 if (!falseop)
3714 return newLOGOP(OP_AND, 0, first, trueop);
3715 if (!trueop)
3716 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3717
8990e307 3718 scalarboolean(first);
79072805
LW		 3719 if (first->op_type == OP_CONST) {
3720 if (SvTRUE(((SVOP*)first)->op_sv)) {
3721 op_free(first);
b1cb66bf 3722 op_free(falseop);
3723 return trueop;
79072805
LW		 3724 }
3725 else {
3726 op_free(first);
b1cb66bf 3727 op_free(trueop);
3728 return falseop;
79072805
LW		 3729 }
3730 }
3731 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3732 list(trueop);
3733 scalar(falseop);
79072805 3734 }
1a67a97c
SM		 3735 NewOp(1101, logop, 1, LOGOP);
3736 logop->op_type = OP_COND_EXPR;
3737 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3738 logop->op_first = first;
3739 logop->op_flags = flags | OPf_KIDS;
3740 logop->op_private = 1 | (flags >> 8);
3741 logop->op_other = LINKLIST(trueop);
3742 logop->op_next = LINKLIST(falseop);
79072805 3743
79072805
LW		 3744
3745 /* establish postfix order */
1a67a97c
SM		 3746 start = LINKLIST(first);
3747 first->op_next = (OP*)logop;
79072805 3748
b1cb66bf 3749 first->op_sibling = trueop;
3750 trueop->op_sibling = falseop;
1a67a97c 3751 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3752
1a67a97c 3753 trueop->op_next = falseop->op_next = o;
79072805 3754
1a67a97c 3755 o->op_next = start;
11343788 3756 return o;
79072805
LW		 3757}
3758
3759OP *
864dbfa3 3760Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3761{
b35b2403 3762 dTHR;
1a67a97c 3763 LOGOP *range;
79072805
LW		 3764 OP *flip;
3765 OP *flop;
1a67a97c 3766 OP *leftstart;
11343788 3767 OP *o;
79072805 3768
1a67a97c 3769 NewOp(1101, range, 1, LOGOP);
79072805 3770
1a67a97c
SM		 3771 range->op_type = OP_RANGE;
3772 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3773 range->op_first = left;
3774 range->op_flags = OPf_KIDS;
3775 leftstart = LINKLIST(left);
3776 range->op_other = LINKLIST(right);
3777 range->op_private = 1 | (flags >> 8);
79072805
LW		 3778
3779 left->op_sibling = right;
3780
1a67a97c
SM		 3781 range->op_next = (OP*)range;
3782 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3783 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3784 o = newUNOP(OP_NULL, 0, flop);
79072805 3785 linklist(flop);
1a67a97c 3786 range->op_next = leftstart;
79072805
LW		 3787
3788 left->op_next = flip;
3789 right->op_next = flop;
3790
1a67a97c
SM		 3791 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3792 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3793 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3794 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3795
3796 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3797 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3798
11343788 3799 flip->op_next = o;
79072805 3800 if (!flip->op_private || !flop->op_private)
11343788 3801 linklist(o); /* blow off optimizer unless constant */
79072805 3802
11343788 3803 return o;
79072805
LW		 3804}
3805
3806OP *
864dbfa3 3807Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3808{
11343788 3809 dTHR;
463ee0b2 3810 OP* listop;
11343788 3811 OP* o;
463ee0b2 3812 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3813 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3814
463ee0b2
LW		 3815 if (expr) {
3816 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3817 return block; /* do {} while 0 does once */
fb73857a 3818 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3819 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3820 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3821 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3822 } else if (expr->op_flags & OPf_KIDS) {
3823 OP *k1 = ((UNOP*)expr)->op_first;
3824 OP *k2 = (k1) ? k1->op_sibling : NULL;
3825 switch (expr->op_type) {
1c846c1f 3826 case OP_NULL:
55d729e4
GS		 3827 if (k2 && k2->op_type == OP_READLINE
3828 && (k2->op_flags & OPf_STACKED)
1c846c1f 3829 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3830 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3831 break;
55d729e4
GS		 3832
3833 case OP_SASSIGN:
3834 if (k1->op_type == OP_READDIR
3835 || k1->op_type == OP_GLOB
72b16652 3836 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3837 || k1->op_type == OP_EACH)
3838 expr = newUNOP(OP_DEFINED, 0, expr);
3839 break;
3840 }
774d564b 3841 }
463ee0b2 3842 }
93a17b20 3843
8990e307 3844 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3845 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3846
883ffac3
CS		 3847 if (listop)
3848 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3849
11343788
MB		 3850 if (once && o != listop)
3851 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3852
11343788
MB		 3853 if (o == listop)
3854 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3855
11343788
MB		 3856 o->op_flags |= flags;
3857 o = scope(o);
3858 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3859 return o;
79072805
LW		 3860}
3861
3862OP *
864dbfa3 3863Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3864{
11343788 3865 dTHR;
79072805
LW		 3866 OP *redo;
3867 OP *next = 0;
3868 OP *listop;
11343788 3869 OP *o;
79072805 3870 OP *condop;
1ba6ee2b 3871 U8 loopflags = 0;
79072805 3872
fb73857a 3873 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3874 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3875 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3876 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3877 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3878 OP *k1 = ((UNOP*)expr)->op_first;
3879 OP *k2 = (k1) ? k1->op_sibling : NULL;
3880 switch (expr->op_type) {
1c846c1f 3881 case OP_NULL:
55d729e4
GS		 3882 if (k2 && k2->op_type == OP_READLINE
3883 && (k2->op_flags & OPf_STACKED)
1c846c1f 3884 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3885 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3886 break;
55d729e4
GS		 3887
3888 case OP_SASSIGN:
3889 if (k1->op_type == OP_READDIR
3890 || k1->op_type == OP_GLOB
72b16652 3891 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3892 || k1->op_type == OP_EACH)
3893 expr = newUNOP(OP_DEFINED, 0, expr);
3894 break;
3895 }
748a9306 3896 }
79072805
LW		 3897
3898 if (!block)
3899 block = newOP(OP_NULL, 0);
87246558
GS		 3900 else if (cont) {
3901 block = scope(block);
3902 }
79072805 3903
1ba6ee2b 3904 if (cont) {
79072805 3905 next = LINKLIST(cont);
1ba6ee2b
GS		 3906 loopflags |= OPpLOOP_CONTINUE;
3907 }
fb73857a 3908 if (expr) {
85538317
GS		 3909 OP *unstack = newOP(OP_UNSTACK, 0);
3910 if (!next)
3911 next = unstack;
3912 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3913 if ((line_t)whileline != NOLINE) {
3280af22 3914 PL_copline = whileline;
fb73857a 3915 cont = append_elem(OP_LINESEQ, cont,
3916 newSTATEOP(0, Nullch, Nullop));
3917 }
3918 }
79072805 3919
463ee0b2 3920 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3921 redo = LINKLIST(listop);
3922
3923 if (expr) {
3280af22 3924 PL_copline = whileline;
883ffac3
CS		 3925 scalar(listop);
3926 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3927 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3928 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3929 op_free((OP*)loop);
883ffac3 3930 return Nullop; /* listop already freed by new_logop */
463ee0b2 3931 }
883ffac3
CS		 3932 if (listop)
3933 ((LISTOP*)listop)->op_last->op_next = condop =
3934 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3935 }
3936 else
11343788 3937 o = listop;
79072805
LW		 3938
3939 if (!loop) {
b7dc083c 3940 NewOp(1101,loop,1,LOOP);
79072805 3941 loop->op_type = OP_ENTERLOOP;
22c35a8c 3942 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3943 loop->op_private = 0;
3944 loop->op_next = (OP*)loop;
3945 }
3946
11343788 3947 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3948
3949 loop->op_redoop = redo;
11343788 3950 loop->op_lastop = o;
1ba6ee2b 3951 o->op_private |= loopflags;
79072805
LW		 3952
3953 if (next)
3954 loop->op_nextop = next;
3955 else
11343788 3956 loop->op_nextop = o;
79072805 3957
11343788
MB		 3958 o->op_flags |= flags;
3959 o->op_private |= (flags >> 8);
3960 return o;
79072805
LW		 3961}
3962
3963OP *
864dbfa3 3964Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3965{
3966 LOOP *loop;
fb73857a 3967 OP *wop;
85e6fe83 3968 int padoff = 0;
4633a7c4 3969 I32 iterflags = 0;
79072805 3970
79072805 3971 if (sv) {
85e6fe83 3972 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3973 sv->op_type = OP_RV2GV;
22c35a8c 3974 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3975 }
85e6fe83
LW		 3976 else if (sv->op_type == OP_PADSV) { /* private variable */
3977 padoff = sv->op_targ;
743e66e6 3978 sv->op_targ = 0;
85e6fe83
LW		 3979 op_free(sv);
3980 sv = Nullop;
3981 }
54b9620d
MB		 3982 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3983 padoff = sv->op_targ;
743e66e6 3984 sv->op_targ = 0;
54b9620d
MB		 3985 iterflags |= OPf_SPECIAL;
3986 op_free(sv);
3987 sv = Nullop;
3988 }
79072805 3989 else
cea2e8a9 3990 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3991 }
3992 else {
54b9620d
MB		 3993#ifdef USE_THREADS
3994 padoff = find_threadsv("_");
3995 iterflags |= OPf_SPECIAL;
3996#else
3280af22 3997 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3998#endif
79072805 3999 }
5f05dabc 4000 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 4001 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 4002 iterflags |= OPf_STACKED;
4003 }
89ea2908
GA		 4004 else if (expr->op_type == OP_NULL &&
4005 (expr->op_flags & OPf_KIDS) &&
4006 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
4007 {
4008 /* Basically turn for($x..$y) into the same as for($x,$y), but we
4009 * set the STACKED flag to indicate that these values are to be
4010 * treated as min/max values by 'pp_iterinit'.
4011 */
4012 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 4013 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 4014 OP* left = range->op_first;
4015 OP* right = left->op_sibling;
5152d7c7 4016 LISTOP* listop;
89ea2908
GA		 4017
4018 range->op_flags &= ~OPf_KIDS;
4019 range->op_first = Nullop;
4020
5152d7c7 4021 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 4022 listop->op_first->op_next = range->op_next;
4023 left->op_next = range->op_other;
5152d7c7
GS		 4024 right->op_next = (OP*)listop;
4025 listop->op_next = listop->op_first;
89ea2908
GA		 4026
4027 op_free(expr);
5152d7c7 4028 expr = (OP*)(listop);
89ea2908
GA		 4029 null(expr);
4030 iterflags |= OPf_STACKED;
4031 }
4032 else {
4033 expr = mod(force_list(expr), OP_GREPSTART);
4034 }
4035
4036
4633a7c4 4037 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 4038 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 4039 assert(!loop->op_next);
b7dc083c 4040#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 4041 {
4042 LOOP *tmp;
4043 NewOp(1234,tmp,1,LOOP);
4044 Copy(loop,tmp,1,LOOP);
4045 loop = tmp;
4046 }
b7dc083c 4047#else
85e6fe83 4048 Renew(loop, 1, LOOP);
1c846c1f 4049#endif
85e6fe83 4050 loop->op_targ = padoff;
fb73857a 4051 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4052 PL_copline = forline;
fb73857a 4053 return newSTATEOP(0, label, wop);
79072805
LW		 4054}
4055
8990e307 4056OP*
864dbfa3 4057Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4058{
11343788
MB		 4059 dTHR;
4060 OP *o;
2d8e6c8d
GS		 4061 STRLEN n_a;
4062
8990e307 4063 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4064 /* "last()" means "last" */
4065 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4066 o = newOP(type, OPf_SPECIAL);
4067 else {
4068 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4069 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4070 : ""));
4071 }
8990e307
LW		 4072 op_free(label);
4073 }
4074 else {
a0d0e21e
LW		 4075 if (label->op_type == OP_ENTERSUB)
4076 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4077 o = newUNOP(type, OPf_STACKED, label);
8990e307 4078 }
3280af22 4079 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4080 return o;
8990e307
LW		 4081}
4082
79072805 4083void
864dbfa3 4084Perl_cv_undef(pTHX_ CV *cv)
79072805 4085{
11343788
MB		 4086 dTHR;
4087#ifdef USE_THREADS
e858de61
MB		 4088 if (CvMUTEXP(cv)) {
4089 MUTEX_DESTROY(CvMUTEXP(cv));
4090 Safefree(CvMUTEXP(cv));
4091 CvMUTEXP(cv) = 0;
4092 }
11343788
MB		 4093#endif /* USE_THREADS */
4094
a0d0e21e 4095 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4096#ifdef USE_THREADS
4097 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4098 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4099#else
a0d0e21e 4100 if (CvDEPTH(cv))
cea2e8a9 4101 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4102#endif /* USE_THREADS */
8990e307 4103 ENTER;
a0d0e21e 4104
7766f137 4105 SAVEVPTR(PL_curpad);
3280af22 4106 PL_curpad = 0;
a0d0e21e 4107
a5f75d66 4108 if (!CvCLONED(cv))
748a9306 4109 op_free(CvROOT(cv));
79072805 4110 CvROOT(cv) = Nullop;
8990e307 4111 LEAVE;
79072805 4112 }
1d5db326 4113 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4114 CvFLAGS(cv) = 0;
8e07c86e
AD		 4115 SvREFCNT_dec(CvGV(cv));
4116 CvGV(cv) = Nullgv;
4117 SvREFCNT_dec(CvOUTSIDE(cv));
4118 CvOUTSIDE(cv) = Nullcv;
beab0874
JT		 4119 if (CvCONST(cv)) {
4120 SvREFCNT_dec((SV*)CvXSUBANY(cv).any_ptr);
4121 CvCONST_off(cv);
4122 }
8e07c86e 4123 if (CvPADLIST(cv)) {
8ebc5c01 4124 /* may be during global destruction */
4125 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4126 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4127 while (i >= 0) {
4128 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4129 SV* sv = svp ? *svp : Nullsv;
4130 if (!sv)
4131 continue;
3280af22
NIS		 4132 if (sv == (SV*)PL_comppad_name)
4133 PL_comppad_name = Nullav;
4134 else if (sv == (SV*)PL_comppad) {
4135 PL_comppad = Nullav;
4136 PL_curpad = Null(SV**);
46fc3d4c 4137 }
4138 SvREFCNT_dec(sv);
8ebc5c01 4139 }
4140 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4141 }
8e07c86e
AD		 4142 CvPADLIST(cv) = Nullav;
4143 }
79072805
LW		 4144}
4145
76e3520e 4146STATIC void
743e66e6 4147S_cv_dump(pTHX_ CV *cv)
5f05dabc 4148{
62fde642 4149#ifdef DEBUGGING
5f05dabc 4150 CV *outside = CvOUTSIDE(cv);
4151 AV* padlist = CvPADLIST(cv);
4fdae800 4152 AV* pad_name;
4153 AV* pad;
4154 SV** pname;
4155 SV** ppad;
5f05dabc 4156 I32 ix;
4157
b900a521
JH		 4158 PerlIO_printf(Perl_debug_log,
4159 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4160 PTR2UV(cv),
ab50184a 4161 (CvANON(cv) ? "ANON"
6b88bc9c 4162 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4163 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4164 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4165 PTR2UV(outside),
ab50184a
CS		 4166 (!outside ? "null"
4167 : CvANON(outside) ? "ANON"
6b88bc9c 4168 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4169 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4170 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4171
4fdae800 4172 if (!padlist)
4173 return;
4174
4175 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4176 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4177 pname = AvARRAY(pad_name);
4178 ppad = AvARRAY(pad);
4179
93965878 4180 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4181 if (SvPOK(pname[ix]))
b900a521
JH		 4182 PerlIO_printf(Perl_debug_log,
4183 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4184 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4185 SvFAKE(pname[ix]) ? "FAKE " : "",
4186 SvPVX(pname[ix]),
b900a521
JH		 4187 (IV)I_32(SvNVX(pname[ix])),
4188 SvIVX(pname[ix]));
5f05dabc 4189 }
743e66e6 4190#endif /* DEBUGGING */
62fde642 4191}
5f05dabc 4192
76e3520e 4193STATIC CV *
cea2e8a9 4194S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4195{
11343788 4196 dTHR;
748a9306
LW		 4197 AV* av;
4198 I32 ix;
4199 AV* protopadlist = CvPADLIST(proto);
4200 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4201 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4202 SV** pname = AvARRAY(protopad_name);
4203 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4204 I32 fname = AvFILLp(protopad_name);
4205 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4206 AV* comppadlist;
4207 CV* cv;
4208
07055b4c
CS		 4209 assert(!CvUNIQUE(proto));
4210
748a9306 4211 ENTER;
354992b1 4212 SAVECOMPPAD();
3280af22
NIS		 4213 SAVESPTR(PL_comppad_name);
4214 SAVESPTR(PL_compcv);
748a9306 4215
3280af22 4216 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4217 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4218 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4219 CvCLONED_on(cv);
748a9306 4220
11343788 4221#ifdef USE_THREADS
12ca11f6 4222 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4223 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4224 CvOWNER(cv) = 0;
4225#endif /* USE_THREADS */
57843af0 4226 CvFILE(cv) = CvFILE(proto);
44a8e56a 4227 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4228 CvSTASH(cv) = CvSTASH(proto);
4229 CvROOT(cv) = CvROOT(proto);
4230 CvSTART(cv) = CvSTART(proto);
5f05dabc 4231 if (outside)
4232 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4233
68dc0745 4234 if (SvPOK(proto))
4235 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4236
3280af22 4237 PL_comppad_name = newAV();
46fc3d4c 4238 for (ix = fname; ix >= 0; ix--)
3280af22 4239 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4240
3280af22 4241 PL_comppad = newAV();
748a9306
LW		 4242
4243 comppadlist = newAV();
4244 AvREAL_off(comppadlist);
3280af22
NIS		 4245 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4246 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4247 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4248 av_fill(PL_comppad, AvFILLp(protopad));
4249 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4250
4251 av = newAV(); /* will be @_ */
4252 av_extend(av, 0);
3280af22 4253 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4254 AvFLAGS(av) = AVf_REIFY;
4255
9607fc9c 4256 for (ix = fpad; ix > 0; ix--) {
4257 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4258 if (namesv && namesv != &PL_sv_undef) {
aa689395 4259 char *name = SvPVX(namesv); /* XXX */
4260 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4261 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4262 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4263 if (!off)
3280af22 4264 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4265 else if (off != ix)
cea2e8a9 4266 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4267 }
4268 else { /* our own lexical */
aa689395 4269 SV* sv;
5f05dabc 4270 if (*name == '&') {
4271 /* anon code -- we'll come back for it */
4272 sv = SvREFCNT_inc(ppad[ix]);
4273 }
4274 else if (*name == '@')
4275 sv = (SV*)newAV();
748a9306 4276 else if (*name == '%')
5f05dabc 4277 sv = (SV*)newHV();
748a9306 4278 else
5f05dabc 4279 sv = NEWSV(0,0);
4280 if (!SvPADBUSY(sv))
4281 SvPADMY_on(sv);
3280af22 4282 PL_curpad[ix] = sv;
748a9306
LW		 4283 }
4284 }
7766f137 4285 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4286 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4287 }
748a9306 4288 else {
aa689395 4289 SV* sv = NEWSV(0,0);
748a9306 4290 SvPADTMP_on(sv);
3280af22 4291 PL_curpad[ix] = sv;
748a9306
LW		 4292 }
4293 }
4294
5f05dabc 4295 /* Now that vars are all in place, clone nested closures. */
4296
9607fc9c 4297 for (ix = fpad; ix > 0; ix--) {
4298 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4299 if (namesv
3280af22 4300 && namesv != &PL_sv_undef
aa689395 4301 && !(SvFLAGS(namesv) & SVf_FAKE)
4302 && *SvPVX(namesv) == '&'
5f05dabc 4303 && CvCLONE(ppad[ix]))
4304 {
4305 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4306 SvREFCNT_dec(ppad[ix]);
4307 CvCLONE_on(kid);
4308 SvPADMY_on(kid);
3280af22 4309 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4310 }
4311 }
4312
5f05dabc 4313#ifdef DEBUG_CLOSURES
ab50184a
CS		 4314 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4315 cv_dump(outside);
4316 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4317 cv_dump(proto);
ab50184a 4318 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4319 cv_dump(cv);
4320#endif
4321
748a9306 4322 LEAVE;
beab0874
JT		 4323
4324 if (CvCONST(cv)) {
4325 SV* const_sv = op_const_sv(CvSTART(cv), cv);
4326 assert(const_sv);
4327 /* constant sub () { $x } closing over $x - see lib/constant.pm */
4328 SvREFCNT_dec(cv);
4329 cv = newCONSTSUB(CvSTASH(proto), 0, const_sv);
4330 }
4331
748a9306
LW		 4332 return cv;
4333}
4334
4335CV *
864dbfa3 4336Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4337{
b099ddc0 4338 CV *cv;
1feb2720 4339 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4340 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4341 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4342 return cv;
5f05dabc 4343}
4344
3fe9a6f1 4345void
864dbfa3 4346Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4347{
0453d815
PM		 4348 dTHR;
4349
e476b1b5 4350 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4351 SV* msg = sv_newmortal();
3fe9a6f1 4352 SV* name = Nullsv;
4353
4354 if (gv)
46fc3d4c 4355 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4356 sv_setpv(msg, "Prototype mismatch:");
4357 if (name)
894356b3 4358 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4359 if (SvPOK(cv))
cea2e8a9 4360 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4361 sv_catpv(msg, " vs ");
4362 if (p)
cea2e8a9 4363 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4364 else
4365 sv_catpv(msg, "none");
e476b1b5 4366 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4367 }
4368}
4369
beab0874
JT		 4370static void const_sv_xsub(pTHXo_ CV* cv);
4371
4372/*
4373=for apidoc cv_const_sv
4374
4375If C<cv> is a constant sub eligible for inlining. returns the constant
4376value returned by the sub. Otherwise, returns NULL.
4377
4378Constant subs can be created with C<newCONSTSUB> or as described in
4379L<perlsub/"Constant Functions">.
4380
4381=cut
4382*/
760ac839 4383SV *
864dbfa3 4384Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4385{
beab0874 4386 if (!cv || !CvCONST(cv))
54310121 4387 return Nullsv;
beab0874 4388 return (SV*)CvXSUBANY(cv).any_ptr;
fe5e78ed 4389}
760ac839 4390
fe5e78ed 4391SV *
864dbfa3 4392Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4393{
4394 SV *sv = Nullsv;
4395
0f79a09d 4396 if (!o)
fe5e78ed 4397 return Nullsv;
1c846c1f
NIS		 4398
4399 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4400 o = cLISTOPo->op_first->op_sibling;
4401
4402 for (; o; o = o->op_next) {
54310121 4403 OPCODE type = o->op_type;
fe5e78ed 4404
1c846c1f 4405 if (sv && o->op_next == o)
fe5e78ed 4406 return sv;
54310121 4407 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4408 continue;
9a049f1c
JT		 4409 if (type == OP_DBSTATE)
4410 continue;
54310121 4411 if (type == OP_LEAVESUB || type == OP_RETURN)
4412 break;
4413 if (sv)
4414 return Nullsv;
7766f137 4415 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4416 sv = cSVOPo->op_sv;
7766f137 4417 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4418 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4419 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
beab0874
JT		 4420 if (!sv)
4421 return Nullsv;
4422 if (CvCONST(cv)) {
4423 /* We get here only from cv_clone2() while creating a closure.
4424 Copy the const value here instead of in cv_clone2 so that
4425 SvREADONLY_on doesn't lead to problems when leaving
4426 scope.
4427 */
4428 sv = newSVsv(sv);
4429 }
4430 if (!SvREADONLY(sv) && SvREFCNT(sv) > 1)
54310121 4431 return Nullsv;
760ac839 4432 }
54310121 4433 else
4434 return Nullsv;
760ac839 4435 }
5aabfad6 4436 if (sv)
4437 SvREADONLY_on(sv);
760ac839
LW		 4438 return sv;
4439}
4440
09bef843
SB		 4441void
4442Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4443{
4444 if (o)
4445 SAVEFREEOP(o);
4446 if (proto)
4447 SAVEFREEOP(proto);
4448 if (attrs)
4449 SAVEFREEOP(attrs);
4450 if (block)
4451 SAVEFREEOP(block);
4452 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4453}
4454
748a9306 4455CV *
864dbfa3 4456Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4457{
09bef843
SB		 4458 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4459}
4460
4461CV *
4462Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4463{
11343788 4464 dTHR;
2d8e6c8d 4465 STRLEN n_a;
83ee9e09
GS		 4466 char *name;
4467 char *aname;
4468 GV *gv;
2d8e6c8d 4469 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4470 register CV *cv=0;
a0d0e21e 4471 I32 ix;
beab0874 4472 SV *const_sv;
79072805 4473
83ee9e09
GS		 4474 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4475 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4476 SV *sv = sv_newmortal();
4477 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4478 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4479 aname = SvPVX(sv);
4480 }
4481 else
4482 aname = Nullch;
4483 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4484 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4485 SVt_PVCV);
4486
11343788 4487 if (o)
5dc0d613 4488 SAVEFREEOP(o);
3fe9a6f1 4489 if (proto)
4490 SAVEFREEOP(proto);
09bef843
SB		 4491 if (attrs)
4492 SAVEFREEOP(attrs);
3fe9a6f1 4493
09bef843 4494 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4495 maximum a prototype before. */
4496 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4497 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4498 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4499 {
e476b1b5 4500 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4501 }
55d729e4
GS		 4502 cv_ckproto((CV*)gv, NULL, ps);
4503 }
4504 if (ps)
4505 sv_setpv((SV*)gv, ps);
4506 else
4507 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4508 SvREFCNT_dec(PL_compcv);
4509 cv = PL_compcv = NULL;
4510 PL_sub_generation++;
beab0874 4511 goto done;
55d729e4
GS		 4512 }
4513
beab0874
JT		 4514 cv = (!name || GvCVGEN(gv)) ? Nullcv : GvCV(gv);
4515
4516 if (!block || !ps || *ps || attrs)
4517 const_sv = Nullsv;
4518 else
4519 const_sv = op_const_sv(block, Nullcv);
4520
4521 if (cv) {
60ed1d8c
GS		 4522 bool exists = CvROOT(cv) || CvXSUB(cv);
4523 /* if the subroutine doesn't exist and wasn't pre-declared
4524 * with a prototype, assume it will be AUTOLOADed,
4525 * skipping the prototype check
4526 */
4527 if (exists || SvPOK(cv))
01ec43d0 4528 cv_ckproto(cv, gv, ps);
68dc0745 4529 /* already defined (or promised)? */
60ed1d8c 4530 if (exists || GvASSUMECV(gv)) {
09bef843 4531 if (!block && !attrs) {
aa689395 4532 /* just a "sub foo;" when &foo is already defined */
3280af22 4533 SAVEFREESV(PL_compcv);
aa689395 4534 goto done;
4535 }
7bac28a0 4536 /* ahem, death to those who redefine active sort subs */
3280af22 4537 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4538 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
beab0874
JT		 4539 if (block) {
4540 if (ckWARN(WARN_REDEFINE)
4541 || (CvCONST(cv)
4542 && (!const_sv || sv_cmp(cv_const_sv(cv), const_sv))))
4543 {
4544 line_t oldline = CopLINE(PL_curcop);
4545 CopLINE_set(PL_curcop, PL_copline);
4546 Perl_warner(aTHX_ WARN_REDEFINE,
4547 CvCONST(cv) ? "Constant subroutine %s redefined"
4548 : "Subroutine %s redefined", name);
4549 CopLINE_set(PL_curcop, oldline);
4550 }
4551 SvREFCNT_dec(cv);
4552 cv = Nullcv;
79072805 4553 }
79072805
LW		 4554 }
4555 }
beab0874
JT		 4556 if (const_sv) {
4557 SvREFCNT_inc(const_sv);
4558 if (cv) {
4559 cv_undef(cv);
fcae944a
HS		 4560#ifdef USE_THREADS
4561 New(666, CvMUTEXP(cv), 1, perl_mutex);
4562 MUTEX_INIT(CvMUTEXP(cv));
4563 CvOWNER(cv) = 0;
4564#endif /* USE_THREADS */
beab0874
JT		 4565 sv_setpv((SV*)cv, ""); /* prototype is "" */
4566 CvXSUBANY(cv).any_ptr = const_sv;
4567 CvXSUB(cv) = const_sv_xsub;
4568 CvCONST_on(cv);
4569 /* XXX Does anybody care that CvFILE(cv) is blank? */
4570 }
4571 else {
4572 GvCV(gv) = Nullcv;
4573 cv = newCONSTSUB(NULL, name, const_sv);
4574 }
4575 op_free(block);
4576 SvREFCNT_dec(PL_compcv);
4577 PL_compcv = NULL;
4578 PL_sub_generation++;
4579 goto done;
4580 }
09bef843
SB		 4581 if (attrs) {
4582 HV *stash;
4583 SV *rcv;
4584
4585 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4586 * before we clobber PL_compcv.
4587 */
4588 if (cv && !block) {
4589 rcv = (SV*)cv;
4590 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4591 stash = GvSTASH(CvGV(cv));
4592 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4593 stash = CvSTASH(cv);
4594 else
4595 stash = PL_curstash;
4596 }
4597 else {
4598 /* possibly about to re-define existing subr -- ignore old cv */
4599 rcv = (SV*)PL_compcv;
4600 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4601 stash = GvSTASH(gv);
4602 else
4603 stash = PL_curstash;
4604 }
4605 apply_attrs(stash, rcv, attrs);
4606 }
a0d0e21e 4607 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4608 if (!block) {
4609 /* got here with just attrs -- work done, so bug out */
4610 SAVEFREESV(PL_compcv);
4611 goto done;
4612 }
4633a7c4 4613 cv_undef(cv);
3280af22
NIS		 4614 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4615 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4616 CvOUTSIDE(PL_compcv) = 0;
4617 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4618 CvPADLIST(PL_compcv) = 0;
4619 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4620 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4621 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4622 }
4623 else {
3280af22 4624 cv = PL_compcv;
44a8e56a 4625 if (name) {
4626 GvCV(gv) = cv;
4627 GvCVGEN(gv) = 0;
3280af22 4628 PL_sub_generation++;
44a8e56a 4629 }
a0d0e21e 4630 }
44a8e56a 4631 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4632 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4633 CvSTASH(cv) = PL_curstash;
11343788
MB		 4634#ifdef USE_THREADS
4635 CvOWNER(cv) = 0;
1cfa4ec7 4636 if (!CvMUTEXP(cv)) {
f6aaf501 4637 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4638 MUTEX_INIT(CvMUTEXP(cv));
4639 }
11343788 4640#endif /* USE_THREADS */
8990e307 4641
3fe9a6f1 4642 if (ps)
4643 sv_setpv((SV*)cv, ps);
4633a7c4 4644
3280af22 4645 if (PL_error_count) {
c07a80fd 4646 op_free(block);
4647 block = Nullop;
68dc0745 4648 if (name) {
4649 char *s = strrchr(name, ':');
4650 s = s ? s+1 : name;
6d4c2119
CS		 4651 if (strEQ(s, "BEGIN")) {
4652 char *not_safe =
4653 "BEGIN not safe after errors--compilation aborted";
faef0170 4654 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4655 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4656 else {
4657 /* force display of errors found but not reported */
38a03e6e 4658 sv_catpv(ERRSV, not_safe);
cea2e8a9 4659 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4660 }
4661 }
68dc0745 4662 }
c07a80fd 4663 }
beab0874
JT		 4664 if (!block)
4665 goto done;
a0d0e21e 4666
3280af22
NIS		 4667 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4668 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4669
7766f137
GS		 4670 if (CvLVALUE(cv)) {
4671 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4672 }
4673 else {
4674 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4675 }
4676 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4677 OpREFCNT_set(CvROOT(cv), 1);
4678 CvSTART(cv) = LINKLIST(CvROOT(cv));
4679 CvROOT(cv)->op_next = 0;
4680 peep(CvSTART(cv));
4681
4682 /* now that optimizer has done its work, adjust pad values */
54310121 4683 if (CvCLONE(cv)) {
3280af22
NIS		 4684 SV **namep = AvARRAY(PL_comppad_name);
4685 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4686 SV *namesv;
4687
7766f137 4688 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4689 continue;
4690 /*
4691 * The only things that a clonable function needs in its
4692 * pad are references to outer lexicals and anonymous subs.
4693 * The rest are created anew during cloning.
4694 */
4695 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4696 namesv != &PL_sv_undef &&
54310121 4697 (SvFAKE(namesv) ||
4698 *SvPVX(namesv) == '&')))
4699 {
3280af22
NIS		 4700 SvREFCNT_dec(PL_curpad[ix]);
4701 PL_curpad[ix] = Nullsv;
54310121 4702 }
4703 }
beab0874
JT		 4704 assert(!CvCONST(cv));
4705 if (ps && !*ps && op_const_sv(block, cv))
4706 CvCONST_on(cv);
a0d0e21e 4707 }
54310121 4708 else {
4709 AV *av = newAV(); /* Will be @_ */
4710 av_extend(av, 0);
3280af22 4711 av_store(PL_comppad, 0, (SV*)av);
54310121 4712 AvFLAGS(av) = AVf_REIFY;
79072805 4713
3280af22 4714 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4715 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4716 continue;
3280af22
NIS		 4717 if (!SvPADMY(PL_curpad[ix]))
4718 SvPADTMP_on(PL_curpad[ix]);
54310121 4719 }
4720 }
79072805 4721
83ee9e09 4722 if (name || aname) {
44a8e56a 4723 char *s;
83ee9e09 4724 char *tname = (name ? name : aname);
44a8e56a 4725
3280af22 4726 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4727 SV *sv = NEWSV(0,0);
44a8e56a 4728 SV *tmpstr = sv_newmortal();
549bb64a 4729 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4730 CV *pcv;
44a8e56a 4731 HV *hv;
4732
ed094faf
GS		 4733 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4734 CopFILE(PL_curcop),
cc49e20b 4735 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4736 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4737 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4738 hv = GvHVn(db_postponed);
9607fc9c 4739 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4740 && (pcv = GvCV(db_postponed)))
4741 {
44a8e56a 4742 dSP;
924508f0 4743 PUSHMARK(SP);
44a8e56a 4744 XPUSHs(tmpstr);
4745 PUTBACK;
83ee9e09 4746 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4747 }
4748 }
79072805 4749
83ee9e09 4750 if ((s = strrchr(tname,':')))
28757baa 4751 s++;
4752 else
83ee9e09 4753 s = tname;
ed094faf 4754
7d30b5c4 4755 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4756 goto done;
4757
68dc0745 4758 if (strEQ(s, "BEGIN")) {
3280af22 4759 I32 oldscope = PL_scopestack_ix;
28757baa 4760 ENTER;
57843af0
GS		 4761 SAVECOPFILE(&PL_compiling);
4762 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4763 save_svref(&PL_rs);
4764 sv_setsv(PL_rs, PL_nrs);
28757baa 4765
3280af22
NIS		 4766 if (!PL_beginav)
4767 PL_beginav = newAV();
28757baa 4768 DEBUG_x( dump_sub(gv) );
ea2f84a3
GS		 4769 av_push(PL_beginav, (SV*)cv);
4770 GvCV(gv) = 0; /* cv has been hijacked */
3280af22 4771 call_list(oldscope, PL_beginav);
a6006777 4772
3280af22 4773 PL_curcop = &PL_compiling;
a0ed51b3 4774 PL_compiling.op_private = PL_hints;
28757baa 4775 LEAVE;
4776 }
3280af22
NIS		 4777 else if (strEQ(s, "END") && !PL_error_count) {
4778 if (!PL_endav)
4779 PL_endav = newAV();
ed094faf 4780 DEBUG_x( dump_sub(gv) );
3280af22 4781 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4782 av_store(PL_endav, 0, (SV*)cv);
4783 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4784 }
7d30b5c4
GS		 4785 else if (strEQ(s, "CHECK") && !PL_error_count) {
4786 if (!PL_checkav)
4787 PL_checkav = newAV();
ed094faf 4788 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4789 if (PL_main_start && ckWARN(WARN_VOID))
4790 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4791 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4792 av_store(PL_checkav, 0, (SV*)cv);
4793 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4794 }
3280af22
NIS		 4795 else if (strEQ(s, "INIT") && !PL_error_count) {
4796 if (!PL_initav)
4797 PL_initav = newAV();
ed094faf 4798 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4799 if (PL_main_start && ckWARN(WARN_VOID))
4800 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4801 av_push(PL_initav, (SV*)cv);
4802 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4803 }
79072805 4804 }
a6006777 4805
aa689395 4806 done:
3280af22 4807 PL_copline = NOLINE;
8990e307 4808 LEAVE_SCOPE(floor);
a0d0e21e 4809 return cv;
79072805
LW		 4810}
4811
b099ddc0 4812/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4813/*
4814=for apidoc newCONSTSUB
4815
4816Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4817eligible for inlining at compile-time.
4818
4819=cut
4820*/
4821
beab0874 4822CV *
864dbfa3 4823Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4824{
4825 dTHR;
beab0874 4826 CV* cv;
5476c433 4827
11faa288 4828 ENTER;
11faa288 4829
f4dd75d9 4830 SAVECOPLINE(PL_curcop);
11faa288 4831 CopLINE_set(PL_curcop, PL_copline);
f4dd75d9
GS		 4832
4833 SAVEHINTS();
3280af22 4834 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4835
4836 if (stash) {
4837 SAVESPTR(PL_curstash);
4838 SAVECOPSTASH(PL_curcop);
4839 PL_curstash = stash;
4840#ifdef USE_ITHREADS
4841 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4842#else
4843 CopSTASH(PL_curcop) = stash;
4844#endif
4845 }
5476c433 4846
beab0874
JT		 4847 cv = newXS(name, const_sv_xsub, __FILE__);
4848 CvXSUBANY(cv).any_ptr = sv;
4849 CvCONST_on(cv);
4850 sv_setpv((SV*)cv, ""); /* prototype is "" */
5476c433 4851
11faa288 4852 LEAVE;
beab0874
JT		 4853
4854 return cv;
5476c433
JD		 4855}
4856
954c1994
GS		 4857/*
4858=for apidoc U||newXS
4859
4860Used by C<xsubpp> to hook up XSUBs as Perl subs.
4861
4862=cut
4863*/
4864
57d3b86d 4865CV *
864dbfa3 4866Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4867{
11343788 4868 dTHR;
44a8e56a 4869 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4870 register CV *cv;
44a8e56a 4871
155aba94 4872 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4873 if (GvCVGEN(gv)) {
4874 /* just a cached method */
4875 SvREFCNT_dec(cv);
4876 cv = 0;
4877 }
4878 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4879 /* already defined (or promised) */
599cee73 4880 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4881 && HvNAME(GvSTASH(CvGV(cv)))
4882 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4883 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4884 if (PL_copline != NOLINE)
57843af0 4885 CopLINE_set(PL_curcop, PL_copline);
beab0874
JT		 4886 Perl_warner(aTHX_ WARN_REDEFINE,
4887 CvCONST(cv) ? "Constant subroutine %s redefined"
4888 : "Subroutine %s redefined"
4889 ,name);
57843af0 4890 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4891 }
4892 SvREFCNT_dec(cv);
4893 cv = 0;
79072805 4894 }
79072805 4895 }
44a8e56a 4896
4897 if (cv) /* must reuse cv if autoloaded */
4898 cv_undef(cv);
a0d0e21e
LW		 4899 else {
4900 cv = (CV*)NEWSV(1105,0);
4901 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4902 if (name) {
4903 GvCV(gv) = cv;
4904 GvCVGEN(gv) = 0;
3280af22 4905 PL_sub_generation++;
44a8e56a 4906 }
a0d0e21e 4907 }
5196be3e 4908 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4909#ifdef USE_THREADS
12ca11f6 4910 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4911 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4912 CvOWNER(cv) = 0;
4913#endif /* USE_THREADS */
b195d487 4914 (void)gv_fetchfile(filename);
57843af0
GS		 4915 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4916 an external constant string */
a0d0e21e 4917 CvXSUB(cv) = subaddr;
44a8e56a 4918
28757baa 4919 if (name) {
4920 char *s = strrchr(name,':');
4921 if (s)
4922 s++;
4923 else
4924 s = name;
ed094faf 4925
7d30b5c4 4926 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4927 goto done;
4928
28757baa 4929 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4930 if (!PL_beginav)
4931 PL_beginav = newAV();
ea2f84a3
GS		 4932 av_push(PL_beginav, (SV*)cv);
4933 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4934 }
4935 else if (strEQ(s, "END")) {
3280af22
NIS		 4936 if (!PL_endav)
4937 PL_endav = newAV();
4938 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4939 av_store(PL_endav, 0, (SV*)cv);
4940 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4941 }
7d30b5c4
GS		 4942 else if (strEQ(s, "CHECK")) {
4943 if (!PL_checkav)
4944 PL_checkav = newAV();
ddda08b7
GS		 4945 if (PL_main_start && ckWARN(WARN_VOID))
4946 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4947 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4948 av_store(PL_checkav, 0, (SV*)cv);
4949 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4950 }
7d07dbc2 4951 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4952 if (!PL_initav)
4953 PL_initav = newAV();
ddda08b7
GS		 4954 if (PL_main_start && ckWARN(WARN_VOID))
4955 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4956 av_push(PL_initav, (SV*)cv);
4957 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4958 }
28757baa 4959 }
8990e307 4960 else
a5f75d66 4961 CvANON_on(cv);
44a8e56a 4962
ed094faf 4963done:
a0d0e21e 4964 return cv;
79072805
LW		 4965}
4966
4967void
864dbfa3 4968Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4969{
11343788 4970 dTHR;
79072805
LW		 4971 register CV *cv;
4972 char *name;
4973 GV *gv;
a0d0e21e 4974 I32 ix;
2d8e6c8d 4975 STRLEN n_a;
79072805 4976
11343788 4977 if (o)
2d8e6c8d 4978 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4979 else
4980 name = "STDOUT";
85e6fe83 4981 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4982 GvMULTI_on(gv);
155aba94 4983 if ((cv = GvFORM(gv))) {
599cee73 4984 if (ckWARN(WARN_REDEFINE)) {
57843af0 4985 line_t oldline = CopLINE(PL_curcop);
79072805 4986
57843af0 4987 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4988 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4989 CopLINE_set(PL_curcop, oldline);
79072805 4990 }
8990e307 4991 SvREFCNT_dec(cv);
79072805 4992 }
3280af22 4993 cv = PL_compcv;
79072805 4994 GvFORM(gv) = cv;
44a8e56a 4995 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4996 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4997
3280af22
NIS		 4998 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4999 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
5000 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 5001 }
5002
79072805 5003 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 5004 CvROOT(cv)->op_private |= OPpREFCOUNTED;
5005 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 5006 CvSTART(cv) = LINKLIST(CvROOT(cv));
5007 CvROOT(cv)->op_next = 0;
5008 peep(CvSTART(cv));
11343788 5009 op_free(o);
3280af22 5010 PL_copline = NOLINE;
8990e307 5011 LEAVE_SCOPE(floor);
79072805
LW		 5012}
5013
5014OP *
864dbfa3 5015Perl_newANONLIST(pTHX_ OP *o)
79072805 5016{
93a17b20 5017 return newUNOP(OP_REFGEN, 0,
11343788 5018 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 5019}
5020
5021OP *
864dbfa3 5022Perl_newANONHASH(pTHX_ OP *o)
79072805 5023{
93a17b20 5024 return newUNOP(OP_REFGEN, 0,
11343788 5025 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 5026}
5027
5028OP *
864dbfa3 5029Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 5030{
09bef843
SB		 5031 return newANONATTRSUB(floor, proto, Nullop, block);
5032}
5033
5034OP *
5035Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
5036{
a0d0e21e 5037 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 5038 newSVOP(OP_ANONCODE, 0,
5039 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 5040}
5041
5042OP *
864dbfa3 5043Perl_oopsAV(pTHX_ OP *o)
79072805 5044{
ed6116ce
LW		 5045 switch (o->op_type) {
5046 case OP_PADSV:
5047 o->op_type = OP_PADAV;
22c35a8c 5048 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 5049 return ref(o, OP_RV2AV);
ed6116ce
LW		 5050
5051 case OP_RV2SV:
79072805 5052 o->op_type = OP_RV2AV;
22c35a8c 5053 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 5054 ref(o, OP_RV2AV);
ed6116ce
LW		 5055 break;
5056
5057 default:
0453d815
PM		 5058 if (ckWARN_d(WARN_INTERNAL))
5059 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 5060 break;
5061 }
79072805
LW		 5062 return o;
5063}
5064
5065OP *
864dbfa3 5066Perl_oopsHV(pTHX_ OP *o)
79072805 5067{
0453d815 5068 dTHR;
1c846c1f 5069
ed6116ce
LW		 5070 switch (o->op_type) {
5071 case OP_PADSV:
5072 case OP_PADAV:
5073 o->op_type = OP_PADHV;
22c35a8c 5074 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 5075 return ref(o, OP_RV2HV);
ed6116ce
LW		 5076
5077 case OP_RV2SV:
5078 case OP_RV2AV:
79072805 5079 o->op_type = OP_RV2HV;
22c35a8c 5080 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 5081 ref(o, OP_RV2HV);
ed6116ce
LW		 5082 break;
5083
5084 default:
0453d815
PM		 5085 if (ckWARN_d(WARN_INTERNAL))
5086 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 5087 break;
5088 }
79072805
LW		 5089 return o;
5090}
5091
5092OP *
864dbfa3 5093Perl_newAVREF(pTHX_ OP *o)
79072805 5094{
ed6116ce
LW		 5095 if (o->op_type == OP_PADANY) {
5096 o->op_type = OP_PADAV;
22c35a8c 5097 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 5098 return o;
ed6116ce 5099 }
79072805
LW		 5100 return newUNOP(OP_RV2AV, 0, scalar(o));
5101}
5102
5103OP *
864dbfa3 5104Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 5105{
82092f1d 5106 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 5107 return newUNOP(OP_NULL, 0, o);
748a9306 5108 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 5109}
5110
5111OP *
864dbfa3 5112Perl_newHVREF(pTHX_ OP *o)
79072805 5113{
ed6116ce
LW		 5114 if (o->op_type == OP_PADANY) {
5115 o->op_type = OP_PADHV;
22c35a8c 5116 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 5117 return o;
ed6116ce 5118 }
79072805
LW		 5119 return newUNOP(OP_RV2HV, 0, scalar(o));
5120}
5121
5122OP *
864dbfa3 5123Perl_oopsCV(pTHX_ OP *o)
79072805 5124{
cea2e8a9 5125 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5126 /* STUB */
5127 return o;
5128}
5129
5130OP *
864dbfa3 5131Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5132{
c07a80fd 5133 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5134}
5135
5136OP *
864dbfa3 5137Perl_newSVREF(pTHX_ OP *o)
79072805 5138{
ed6116ce
LW		 5139 if (o->op_type == OP_PADANY) {
5140 o->op_type = OP_PADSV;
22c35a8c 5141 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5142 return o;
ed6116ce 5143 }
224a4551
MB		 5144 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5145 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5146 return o;
224a4551 5147 }
79072805
LW		 5148 return newUNOP(OP_RV2SV, 0, scalar(o));
5149}
5150
5151/* Check routines. */
5152
5153OP *
cea2e8a9 5154Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5155{
178c6305
CS		 5156 PADOFFSET ix;
5157 SV* name;
5158
5159 name = NEWSV(1106,0);
5160 sv_upgrade(name, SVt_PVNV);
5161 sv_setpvn(name, "&", 1);
5162 SvIVX(name) = -1;
5163 SvNVX(name) = 1;
5dc0d613 5164 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5165 av_store(PL_comppad_name, ix, name);
5166 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5167 SvPADMY_on(cSVOPo->op_sv);
5168 cSVOPo->op_sv = Nullsv;
5169 cSVOPo->op_targ = ix;
5170 return o;
5f05dabc 5171}
5172
5173OP *
cea2e8a9 5174Perl_ck_bitop(pTHX_ OP *o)
55497cff 5175{
3280af22 5176 o->op_private = PL_hints;
5dc0d613 5177 return o;
55497cff 5178}
5179
5180OP *
cea2e8a9 5181Perl_ck_concat(pTHX_ OP *o)
79072805 5182{
11343788
MB		 5183 if (cUNOPo->op_first->op_type == OP_CONCAT)
5184 o->op_flags |= OPf_STACKED;
5185 return o;
79072805
LW		 5186}
5187
5188OP *
cea2e8a9 5189Perl_ck_spair(pTHX_ OP *o)
79072805 5190{
11343788 5191 if (o->op_flags & OPf_KIDS) {
79072805 5192 OP* newop;
a0d0e21e 5193 OP* kid;
5dc0d613
MB		 5194 OPCODE type = o->op_type;
5195 o = modkids(ck_fun(o), type);
11343788 5196 kid = cUNOPo->op_first;
a0d0e21e
LW		 5197 newop = kUNOP->op_first->op_sibling;
5198 if (newop &&
5199 (newop->op_sibling ||
22c35a8c 5200 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5201 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5202 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5203
11343788 5204 return o;
a0d0e21e
LW		 5205 }
5206 op_free(kUNOP->op_first);
5207 kUNOP->op_first = newop;
5208 }
22c35a8c 5209 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5210 return ck_fun(o);
a0d0e21e
LW		 5211}
5212
5213OP *
cea2e8a9 5214Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5215{
11343788 5216 o = ck_fun(o);
5dc0d613 5217 o->op_private = 0;
11343788
MB		 5218 if (o->op_flags & OPf_KIDS) {
5219 OP *kid = cUNOPo->op_first;
01020589
GS		 5220 switch (kid->op_type) {
5221 case OP_ASLICE:
5222 o->op_flags |= OPf_SPECIAL;
5223 /* FALL THROUGH */
5224 case OP_HSLICE:
5dc0d613 5225 o->op_private |= OPpSLICE;
01020589
GS		 5226 break;
5227 case OP_AELEM:
5228 o->op_flags |= OPf_SPECIAL;
5229 /* FALL THROUGH */
5230 case OP_HELEM:
5231 break;
5232 default:
5233 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5234 PL_op_desc[o->op_type]);
01020589 5235 }
a0d0e21e 5236 null(kid);
79072805 5237 }
11343788 5238 return o;
79072805
LW		 5239}
5240
5241OP *
cea2e8a9 5242Perl_ck_eof(pTHX_ OP *o)
79072805 5243{
11343788 5244 I32 type = o->op_type;
79072805 5245
11343788
MB		 5246 if (o->op_flags & OPf_KIDS) {
5247 if (cLISTOPo->op_first->op_type == OP_STUB) {
5248 op_free(o);
5249 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5250 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5251 }
11343788 5252 return ck_fun(o);
79072805 5253 }
11343788 5254 return o;
79072805
LW		 5255}
5256
5257OP *
cea2e8a9 5258Perl_ck_eval(pTHX_ OP *o)
79072805 5259{
3280af22 5260 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5261 if (o->op_flags & OPf_KIDS) {
5262 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5263
93a17b20 5264 if (!kid) {
11343788
MB		 5265 o->op_flags &= ~OPf_KIDS;
5266 null(o);
79072805
LW		 5267 }
5268 else if (kid->op_type == OP_LINESEQ) {
5269 LOGOP *enter;
5270
11343788
MB		 5271 kid->op_next = o->op_next;
5272 cUNOPo->op_first = 0;
5273 op_free(o);
79072805 5274
b7dc083c 5275 NewOp(1101, enter, 1, LOGOP);
79072805 5276 enter->op_type = OP_ENTERTRY;
22c35a8c 5277 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5278 enter->op_private = 0;
5279
5280 /* establish postfix order */
5281 enter->op_next = (OP*)enter;
5282
11343788
MB		 5283 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5284 o->op_type = OP_LEAVETRY;
22c35a8c 5285 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5286 enter->op_other = o;
5287 return o;
79072805 5288 }
c7cc6f1c 5289 else
473986ff 5290 scalar((OP*)kid);
79072805
LW		 5291 }
5292 else {
11343788 5293 op_free(o);
54b9620d 5294 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5295 }
3280af22 5296 o->op_targ = (PADOFFSET)PL_hints;
11343788 5297 return o;
79072805
LW		 5298}
5299
5300OP *
d98f61e7
GS		 5301Perl_ck_exit(pTHX_ OP *o)
5302{
5303#ifdef VMS
5304 HV *table = GvHV(PL_hintgv);
5305 if (table) {
5306 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5307 if (svp && *svp && SvTRUE(*svp))
5308 o->op_private |= OPpEXIT_VMSISH;
5309 }
5310#endif
5311 return ck_fun(o);
5312}
5313
5314OP *
cea2e8a9 5315Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5316{
5317 OP *kid;
11343788
MB		 5318 if (o->op_flags & OPf_STACKED) {
5319 o = ck_fun(o);
5320 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5321 if (kid->op_type == OP_RV2GV)
5322 null(kid);
79072805 5323 }
463ee0b2 5324 else
11343788
MB		 5325 o = listkids(o);
5326 return o;
79072805
LW		 5327}
5328
5329OP *
cea2e8a9 5330Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5331{
5196be3e
MB		 5332 o = ck_fun(o);
5333 if (o->op_flags & OPf_KIDS) {
5334 OP *kid = cUNOPo->op_first;
afebc493
GS		 5335 if (kid->op_type == OP_ENTERSUB) {
5336 (void) ref(kid, o->op_type);
5337 if (kid->op_type != OP_RV2CV && !PL_error_count)
5338 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5339 PL_op_desc[o->op_type]);
5340 o->op_private |= OPpEXISTS_SUB;
5341 }
5342 else if (kid->op_type == OP_AELEM)
01020589
GS		 5343 o->op_flags |= OPf_SPECIAL;
5344 else if (kid->op_type != OP_HELEM)
5345 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5346 PL_op_desc[o->op_type]);
5f05dabc 5347 null(kid);
5348 }
5196be3e 5349 return o;
5f05dabc 5350}
5351
22c35a8c 5352#if 0
5f05dabc 5353OP *
cea2e8a9 5354Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5355{
5356 o = fold_constants(o);
5357 if (o->op_type == OP_CONST)
5358 o->op_type = OP_GV;
5359 return o;
5360}
22c35a8c 5361#endif
79072805
LW		 5362
5363OP *
cea2e8a9 5364Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5365{
11343788
MB		 5366 dTHR;
5367 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5368
3280af22 5369 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5370 if (kid->op_type == OP_CONST) {
44a8e56a 5371 char *name;
5372 int iscv;
5373 GV *gv;
779c5bc9 5374 SV *kidsv = kid->op_sv;
2d8e6c8d 5375 STRLEN n_a;
44a8e56a 5376
779c5bc9
GS		 5377 /* Is it a constant from cv_const_sv()? */
5378 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5379 SV *rsv = SvRV(kidsv);
5380 int svtype = SvTYPE(rsv);
5381 char *badtype = Nullch;
5382
5383 switch (o->op_type) {
5384 case OP_RV2SV:
5385 if (svtype > SVt_PVMG)
5386 badtype = "a SCALAR";
5387 break;
5388 case OP_RV2AV:
5389 if (svtype != SVt_PVAV)
5390 badtype = "an ARRAY";
5391 break;
5392 case OP_RV2HV:
5393 if (svtype != SVt_PVHV) {
5394 if (svtype == SVt_PVAV) { /* pseudohash? */
5395 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5396 if (ksv && SvROK(*ksv)
5397 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5398 {
5399 break;
5400 }
5401 }
5402 badtype = "a HASH";
5403 }
5404 break;
5405 case OP_RV2CV:
5406 if (svtype != SVt_PVCV)
5407 badtype = "a CODE";
5408 break;
5409 }
5410 if (badtype)
cea2e8a9 5411 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5412 return o;
5413 }
2d8e6c8d 5414 name = SvPV(kidsv, n_a);
3280af22 5415 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5416 char *badthing = Nullch;
5dc0d613 5417 switch (o->op_type) {
44a8e56a 5418 case OP_RV2SV:
5419 badthing = "a SCALAR";
5420 break;
5421 case OP_RV2AV:
5422 badthing = "an ARRAY";
5423 break;
5424 case OP_RV2HV:
5425 badthing = "a HASH";
5426 break;
5427 }
5428 if (badthing)
1c846c1f 5429 Perl_croak(aTHX_
44a8e56a 5430 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5431 name, badthing);
5432 }
93233ece
CS		 5433 /*
5434 * This is a little tricky. We only want to add the symbol if we
5435 * didn't add it in the lexer. Otherwise we get duplicate strict
5436 * warnings. But if we didn't add it in the lexer, we must at
5437 * least pretend like we wanted to add it even if it existed before,
5438 * or we get possible typo warnings. OPpCONST_ENTERED says
5439 * whether the lexer already added THIS instance of this symbol.
5440 */
5196be3e 5441 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5442 do {
44a8e56a 5443 gv = gv_fetchpv(name,
748a9306 5444 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5445 iscv
5446 ? SVt_PVCV
11343788 5447 : o->op_type == OP_RV2SV
a0d0e21e 5448 ? SVt_PV
11343788 5449 : o->op_type == OP_RV2AV
a0d0e21e 5450 ? SVt_PVAV
11343788 5451 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5452 ? SVt_PVHV
5453 : SVt_PVGV);
93233ece
CS		 5454 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5455 if (gv) {
5456 kid->op_type = OP_GV;
5457 SvREFCNT_dec(kid->op_sv);
350de78d 5458#ifdef USE_ITHREADS
638eceb6 5459 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5460 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
63caf608 5461 SvREFCNT_dec(PL_curpad[kPADOP->op_padix]);
743e66e6 5462 GvIN_PAD_on(gv);
350de78d
GS		 5463 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5464#else
93233ece 5465 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5466#endif
76cd736e 5467 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5468 }
79072805 5469 }
11343788 5470 return o;
79072805
LW		 5471}
5472
5473OP *
cea2e8a9 5474Perl_ck_ftst(pTHX_ OP *o)
79072805 5475{
11343788
MB		 5476 dTHR;
5477 I32 type = o->op_type;
79072805 5478
d0dca557
JD		 5479 if (o->op_flags & OPf_REF) {
5480 /* nothing */
5481 }
5482 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5483 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5484
5485 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5486 STRLEN n_a;
a0d0e21e 5487 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5488 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5489 op_free(o);
d0dca557 5490 o = newop;
79072805
LW		 5491 }
5492 }
5493 else {
11343788 5494 op_free(o);
79072805 5495 if (type == OP_FTTTY)
d0dca557 5496 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5497 SVt_PVIO));
79072805 5498 else
d0dca557 5499 o = newUNOP(type, 0, newDEFSVOP());
79072805 5500 }
d0dca557
JD		 5501#ifdef USE_LOCALE
5502 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5503 o->op_private = 0;
5504 if (PL_hints & HINT_LOCALE)
5505 o->op_private |= OPpLOCALE;
5506 }
5507#endif
11343788 5508 return o;
79072805
LW		 5509}
5510
5511OP *
cea2e8a9 5512Perl_ck_fun(pTHX_ OP *o)
79072805 5513{
11343788 5514 dTHR;
79072805
LW		 5515 register OP *kid;
5516 OP **tokid;
5517 OP *sibl;
5518 I32 numargs = 0;
11343788 5519 int type = o->op_type;
22c35a8c 5520 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5521
11343788 5522 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5523 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5524 oa &= ~OA_OPTIONAL;
5525 else
11343788 5526 return no_fh_allowed(o);
79072805
LW		 5527 }
5528
11343788 5529 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5530 STRLEN n_a;
11343788
MB		 5531 tokid = &cLISTOPo->op_first;
5532 kid = cLISTOPo->op_first;
8990e307 5533 if (kid->op_type == OP_PUSHMARK ||
155aba94 5534 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5535 {
79072805
LW		 5536 tokid = &kid->op_sibling;
5537 kid = kid->op_sibling;
5538 }
22c35a8c 5539 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5540 *tokid = kid = newDEFSVOP();
79072805
LW		 5541
5542 while (oa && kid) {
5543 numargs++;
5544 sibl = kid->op_sibling;
5545 switch (oa & 7) {
5546 case OA_SCALAR:
62c18ce2
GS		 5547 /* list seen where single (scalar) arg expected? */
5548 if (numargs == 1 && !(oa >> 4)
5549 && kid->op_type == OP_LIST && type != OP_SCALAR)
5550 {
5551 return too_many_arguments(o,PL_op_desc[type]);
5552 }
79072805
LW		 5553 scalar(kid);
5554 break;
5555 case OA_LIST:
5556 if (oa < 16) {
5557 kid = 0;
5558 continue;
5559 }
5560 else
5561 list(kid);
5562 break;
5563 case OA_AVREF:
5564 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5565 (kid->op_private & OPpCONST_BARE))
5566 {
2d8e6c8d 5567 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5568 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5569 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5570 if (ckWARN(WARN_DEPRECATED))
5571 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5572 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5573 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5574 op_free(kid);
5575 kid = newop;
5576 kid->op_sibling = sibl;
5577 *tokid = kid;
5578 }
8990e307 5579 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5580 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5581 mod(kid, type);
79072805
LW		 5582 break;
5583 case OA_HVREF:
5584 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5585 (kid->op_private & OPpCONST_BARE))
5586 {
2d8e6c8d 5587 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5588 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5589 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5590 if (ckWARN(WARN_DEPRECATED))
5591 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5592 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5593 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5594 op_free(kid);
5595 kid = newop;
5596 kid->op_sibling = sibl;
5597 *tokid = kid;
5598 }
8990e307 5599 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5600 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5601 mod(kid, type);
79072805
LW		 5602 break;
5603 case OA_CVREF:
5604 {
a0d0e21e 5605 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5606 kid->op_sibling = 0;
5607 linklist(kid);
5608 newop->op_next = newop;
5609 kid = newop;
5610 kid->op_sibling = sibl;
5611 *tokid = kid;
5612 }
5613 break;
5614 case OA_FILEREF:
c340be78 5615 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5616 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5617 (kid->op_private & OPpCONST_BARE))
5618 {
79072805 5619 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5620 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5621 SVt_PVIO) );
79072805
LW		 5622 op_free(kid);
5623 kid = newop;
5624 }
1ea32a52
GS		 5625 else if (kid->op_type == OP_READLINE) {
5626 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5627 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5628 }
79072805 5629 else {
35cd451c 5630 I32 flags = OPf_SPECIAL;
a6c40364 5631 I32 priv = 0;
2c8ac474
GS		 5632 PADOFFSET targ = 0;
5633
35cd451c 5634 /* is this op a FH constructor? */
853846ea 5635 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5636 char *name = Nullch;
5637 STRLEN len;
5638
5639 flags = 0;
5640 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5641 * need to "prove" flag does not mean something
5642 * else already - NI-S 1999/05/07
2c8ac474
GS		 5643 */
5644 priv = OPpDEREF;
5645 if (kid->op_type == OP_PADSV) {
5646 SV **namep = av_fetch(PL_comppad_name,
5647 kid->op_targ, 4);
5648 if (namep && *namep)
5649 name = SvPV(*namep, len);
5650 }
5651 else if (kid->op_type == OP_RV2SV
5652 && kUNOP->op_first->op_type == OP_GV)
5653 {
5654 GV *gv = cGVOPx_gv(kUNOP->op_first);
5655 name = GvNAME(gv);
5656 len = GvNAMELEN(gv);
5657 }
afd1915d
GS		 5658 else if (kid->op_type == OP_AELEM
5659 || kid->op_type == OP_HELEM)
5660 {
5661 name = "__ANONIO__";
5662 len = 10;
5663 mod(kid,type);
5664 }
2c8ac474
GS		 5665 if (name) {
5666 SV *namesv;
5667 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5668 namesv = PL_curpad[targ];
155aba94 5669 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5670 if (*name != '$')
5671 sv_setpvn(namesv, "$", 1);
5672 sv_catpvn(namesv, name, len);
5673 }
853846ea 5674 }
79072805 5675 kid->op_sibling = 0;
35cd451c 5676 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5677 kid->op_targ = targ;
5678 kid->op_private |= priv;
79072805
LW		 5679 }
5680 kid->op_sibling = sibl;
5681 *tokid = kid;
5682 }
5683 scalar(kid);
5684 break;
5685 case OA_SCALARREF:
a0d0e21e 5686 mod(scalar(kid), type);
79072805
LW		 5687 break;
5688 }
5689 oa >>= 4;
5690 tokid = &kid->op_sibling;
5691 kid = kid->op_sibling;
5692 }
11343788 5693 o->op_private |= numargs;
79072805 5694 if (kid)
22c35a8c 5695 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5696 listkids(o);
79072805 5697 }
22c35a8c 5698 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5699 op_free(o);
54b9620d 5700 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5701 }
5702
79072805
LW		 5703 if (oa) {
5704 while (oa & OA_OPTIONAL)
5705 oa >>= 4;
5706 if (oa && oa != OA_LIST)
22c35a8c 5707 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5708 }
11343788 5709 return o;
79072805
LW		 5710}
5711
5712OP *
cea2e8a9 5713Perl_ck_glob(pTHX_ OP *o)
79072805 5714{
fb73857a 5715 GV *gv;
5716
649da076 5717 o = ck_fun(o);
1f2bfc8a 5718 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5719 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5720
5721 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5722 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5723
52bb0670 5724#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5725 /* XXX this can be tightened up and made more failsafe. */
5726 if (!gv) {
72b16652 5727 ENTER;
e4783991
GS		 5728 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5729 /* null-terminated import list */
5730 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5731 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5732 LEAVE;
5733 }
52bb0670 5734#endif /* PERL_EXTERNAL_GLOB */
72b16652 5735
b1cb66bf 5736 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5737 append_elem(OP_GLOB, o,
80252599 5738 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5739 o->op_type = OP_LIST;
22c35a8c 5740 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5741 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5742 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5743 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5744 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5745 scalar(newUNOP(OP_RV2CV, 0,
5746 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5747 o = newUNOP(OP_NULL, 0, ck_subr(o));
5748 o->op_targ = OP_GLOB; /* hint at what it used to be */
5749 return o;
b1cb66bf 5750 }
5751 gv = newGVgen("main");
a0d0e21e 5752 gv_IOadd(gv);
11343788
MB		 5753 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5754 scalarkids(o);
649da076 5755 return o;
79072805
LW		 5756}
5757
5758OP *
cea2e8a9 5759Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5760{
5761 LOGOP *gwop;
5762 OP *kid;
11343788 5763 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5764
22c35a8c 5765 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5766 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5767
11343788 5768 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5769 OP* k;
11343788
MB		 5770 o = ck_sort(o);
5771 kid = cLISTOPo->op_first->op_sibling;
5772 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5773 kid = k;
5774 }
5775 kid->op_next = (OP*)gwop;
11343788 5776 o->op_flags &= ~OPf_STACKED;
93a17b20 5777 }
11343788 5778 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5779 if (type == OP_MAPWHILE)
5780 list(kid);
5781 else
5782 scalar(kid);
11343788 5783 o = ck_fun(o);
3280af22 5784 if (PL_error_count)
11343788 5785 return o;
aeea060c 5786 kid = cLISTOPo->op_first->op_sibling;
79072805 5787 if (kid->op_type != OP_NULL)
cea2e8a9 5788 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5789 kid = kUNOP->op_first;
5790
a0d0e21e 5791 gwop->op_type = type;
22c35a8c 5792 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5793 gwop->op_first = listkids(o);
79072805
LW		 5794 gwop->op_flags |= OPf_KIDS;
5795 gwop->op_private = 1;
5796 gwop->op_other = LINKLIST(kid);
a0d0e21e 5797 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5798 kid->op_next = (OP*)gwop;
5799
11343788 5800 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5801 if (!kid || !kid->op_sibling)
22c35a8c 5802 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5803 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5804 mod(kid, OP_GREPSTART);
5805
79072805
LW		 5806 return (OP*)gwop;
5807}
5808
5809OP *
cea2e8a9 5810Perl_ck_index(pTHX_ OP *o)
79072805 5811{
11343788
MB		 5812 if (o->op_flags & OPf_KIDS) {
5813 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5814 if (kid)
5815 kid = kid->op_sibling; /* get past "big" */
79072805 5816 if (kid && kid->op_type == OP_CONST)
2779dcf1 5817 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5818 }
11343788 5819 return ck_fun(o);
79072805
LW		 5820}
5821
5822OP *
cea2e8a9 5823Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5824{
5825 /* XXX length optimization goes here */
11343788 5826 return ck_fun(o);
79072805
LW		 5827}
5828
5829OP *
cea2e8a9 5830Perl_ck_lfun(pTHX_ OP *o)
79072805 5831{
5dc0d613
MB		 5832 OPCODE type = o->op_type;
5833 return modkids(ck_fun(o), type);
79072805
LW		 5834}
5835
5836OP *
cea2e8a9 5837Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5838{
20ce7b12 5839 dTHR;
d0334bed
GS		 5840 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5841 switch (cUNOPo->op_first->op_type) {
5842 case OP_RV2AV:
a8739d98
JH		 5843 /* This is needed for
5844 if (defined %stash::)
5845 to work. Do not break Tk.
5846 */
1c846c1f 5847 break; /* Globals via GV can be undef */
d0334bed
GS		 5848 case OP_PADAV:
5849 case OP_AASSIGN: /* Is this a good idea? */
5850 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5851 "defined(@array) is deprecated");
d0334bed 5852 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5853 "\t(Maybe you should just omit the defined()?)\n");
69794302 5854 break;
d0334bed 5855 case OP_RV2HV:
a8739d98
JH		 5856 /* This is needed for
5857 if (defined %stash::)
5858 to work. Do not break Tk.
5859 */
1c846c1f 5860 break; /* Globals via GV can be undef */
d0334bed
GS		 5861 case OP_PADHV:
5862 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5863 "defined(%%hash) is deprecated");
d0334bed 5864 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5865 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5866 break;
5867 default:
5868 /* no warning */
5869 break;
5870 }
69794302
MJD		 5871 }
5872 return ck_rfun(o);
5873}
5874
5875OP *
cea2e8a9 5876Perl_ck_rfun(pTHX_ OP *o)
8990e307 5877{
5dc0d613
MB		 5878 OPCODE type = o->op_type;
5879 return refkids(ck_fun(o), type);
8990e307
LW		 5880}
5881
5882OP *
cea2e8a9 5883Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5884{
5885 register OP *kid;
aeea060c 5886
11343788 5887 kid = cLISTOPo->op_first;
79072805 5888 if (!kid) {
11343788
MB		 5889 o = force_list(o);
5890 kid = cLISTOPo->op_first;
79072805
LW		 5891 }
5892 if (kid->op_type == OP_PUSHMARK)
5893 kid = kid->op_sibling;
11343788 5894 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5895 kid = kid->op_sibling;
5896 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5897 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5898 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5899 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5900 cLISTOPo->op_first->op_sibling = kid;
5901 cLISTOPo->op_last = kid;
79072805
LW		 5902 kid = kid->op_sibling;
5903 }
5904 }
5905
5906 if (!kid)
54b9620d 5907 append_elem(o->op_type, o, newDEFSVOP());
79072805 5908
5dc0d613 5909 o = listkids(o);
bbce6d69 5910
5dc0d613 5911 o->op_private = 0;
36477c24 5912#ifdef USE_LOCALE
3280af22 5913 if (PL_hints & HINT_LOCALE)
5dc0d613 5914 o->op_private |= OPpLOCALE;
bbce6d69 5915#endif
5916
5dc0d613 5917 return o;
bbce6d69 5918}
5919
5920OP *
cea2e8a9 5921Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5922{
5dc0d613 5923 o = ck_fun(o);
bbce6d69 5924
5dc0d613 5925 o->op_private = 0;
36477c24 5926#ifdef USE_LOCALE
3280af22 5927 if (PL_hints & HINT_LOCALE)
5dc0d613 5928 o->op_private |= OPpLOCALE;
bbce6d69 5929#endif
5930
5dc0d613 5931 return o;
bbce6d69 5932}
5933
5934OP *
b162f9ea
IZ		 5935Perl_ck_sassign(pTHX_ OP *o)
5936{
5937 OP *kid = cLISTOPo->op_first;
5938 /* has a disposable target? */
5939 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5940 && !(kid->op_flags & OPf_STACKED)
5941 /* Cannot steal the second time! */
5942 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5943 {
5944 OP *kkid = kid->op_sibling;
5945
5946 /* Can just relocate the target. */
2c2d71f5
JH		 5947 if (kkid && kkid->op_type == OP_PADSV
5948 && !(kkid->op_private & OPpLVAL_INTRO))
5949 {
b162f9ea 5950 kid->op_targ = kkid->op_targ;
743e66e6 5951 kkid->op_targ = 0;
b162f9ea
IZ		 5952 /* Now we do not need PADSV and SASSIGN. */
5953 kid->op_sibling = o->op_sibling; /* NULL */
5954 cLISTOPo->op_first = NULL;
5955 op_free(o);
5956 op_free(kkid);
5957 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5958 return kid;
5959 }
5960 }
5961 return o;
5962}
5963
5964OP *
cea2e8a9 5965Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5966{
5dc0d613 5967 o->op_private = 0;
36477c24 5968#ifdef USE_LOCALE
3280af22 5969 if (PL_hints & HINT_LOCALE)
5dc0d613 5970 o->op_private |= OPpLOCALE;
bbce6d69 5971#endif
36477c24 5972
5dc0d613 5973 return o;
79072805
LW		 5974}
5975
5976OP *
cea2e8a9 5977Perl_ck_match(pTHX_ OP *o)
79072805 5978{
5dc0d613 5979 o->op_private |= OPpRUNTIME;
11343788 5980 return o;
79072805
LW		 5981}
5982
5983OP *
f5d5a27c
CS		 5984Perl_ck_method(pTHX_ OP *o)
5985{
5986 OP *kid = cUNOPo->op_first;
5987 if (kid->op_type == OP_CONST) {
5988 SV* sv = kSVOP->op_sv;
5989 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5990 OP *cmop;
1c846c1f
NIS		 5991 if (!SvREADONLY(sv) || !SvFAKE(sv)) {
5992 sv = newSVpvn_share(SvPVX(sv), SvCUR(sv), 0);
5993 }
5994 else {
5995 kSVOP->op_sv = Nullsv;
5996 }
f5d5a27c 5997 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
f5d5a27c
CS		 5998 op_free(o);
5999 return cmop;
6000 }
6001 }
6002 return o;
6003}
6004
6005OP *
cea2e8a9 6006Perl_ck_null(pTHX_ OP *o)
79072805 6007{
11343788 6008 return o;
79072805
LW		 6009}
6010
6011OP *
16fe6d59
GS		 6012Perl_ck_open(pTHX_ OP *o)
6013{
6014 HV *table = GvHV(PL_hintgv);
6015 if (table) {
6016 SV **svp;
6017 I32 mode;
6018 svp = hv_fetch(table, "open_IN", 7, FALSE);
6019 if (svp && *svp) {
6020 mode = mode_from_discipline(*svp);
6021 if (mode & O_BINARY)
6022 o->op_private |= OPpOPEN_IN_RAW;
6023 else if (mode & O_TEXT)
6024 o->op_private |= OPpOPEN_IN_CRLF;
6025 }
6026
6027 svp = hv_fetch(table, "open_OUT", 8, FALSE);
6028 if (svp && *svp) {
6029 mode = mode_from_discipline(*svp);
6030 if (mode & O_BINARY)
6031 o->op_private |= OPpOPEN_OUT_RAW;
6032 else if (mode & O_TEXT)
6033 o->op_private |= OPpOPEN_OUT_CRLF;
6034 }
6035 }
6036 if (o->op_type == OP_BACKTICK)
6037 return o;
6038 return ck_fun(o);
6039}
6040
6041OP *
cea2e8a9 6042Perl_ck_repeat(pTHX_ OP *o)
79072805 6043{
11343788
MB		 6044 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
6045 o->op_private |= OPpREPEAT_DOLIST;
6046 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 6047 }
6048 else
11343788
MB		 6049 scalar(o);
6050 return o;
79072805
LW		 6051}
6052
6053OP *
cea2e8a9 6054Perl_ck_require(pTHX_ OP *o)
8990e307 6055{
11343788
MB		 6056 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
6057 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 6058
6059 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 6060 char *s;
a0d0e21e
LW		 6061 for (s = SvPVX(kid->op_sv); *s; s++) {
6062 if (*s == ':' && s[1] == ':') {
6063 *s = '/';
1aef975c 6064 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 6065 --SvCUR(kid->op_sv);
6066 }
8990e307 6067 }
ce3b816e
GS		 6068 if (SvREADONLY(kid->op_sv)) {
6069 SvREADONLY_off(kid->op_sv);
6070 sv_catpvn(kid->op_sv, ".pm", 3);
6071 SvREADONLY_on(kid->op_sv);
6072 }
6073 else
6074 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 6075 }
6076 }
11343788 6077 return ck_fun(o);
8990e307
LW		 6078}
6079
22c35a8c 6080#if 0
8990e307 6081OP *
cea2e8a9 6082Perl_ck_retarget(pTHX_ OP *o)
79072805 6083{
cea2e8a9 6084 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 6085 /* STUB */
11343788 6086 return o;
79072805 6087}
22c35a8c 6088#endif
79072805
LW		 6089
6090OP *
cea2e8a9 6091Perl_ck_select(pTHX_ OP *o)
79072805 6092{
c07a80fd 6093 OP* kid;
11343788
MB		 6094 if (o->op_flags & OPf_KIDS) {
6095 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 6096 if (kid && kid->op_sibling) {
11343788 6097 o->op_type = OP_SSELECT;
22c35a8c 6098 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 6099 o = ck_fun(o);
6100 return fold_constants(o);
79072805
LW		 6101 }
6102 }
11343788
MB		 6103 o = ck_fun(o);
6104 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 6105 if (kid && kid->op_type == OP_RV2GV)
6106 kid->op_private &= ~HINT_STRICT_REFS;
11343788 6107 return o;
79072805
LW		 6108}
6109
6110OP *
cea2e8a9 6111Perl_ck_shift(pTHX_ OP *o)
79072805 6112{
11343788 6113 I32 type = o->op_type;
79072805 6114
11343788 6115 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 6116 OP *argop;
6117
11343788 6118 op_free(o);
6d4ff0d2 6119#ifdef USE_THREADS
533c011a 6120 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 6121 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 6122 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 6123 }
6124 else {
6125 argop = newUNOP(OP_RV2AV, 0,
6126 scalar(newGVOP(OP_GV, 0,
6127 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6128 }
6129#else
6130 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 6131 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6132 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6133#endif /* USE_THREADS */
6134 return newUNOP(type, 0, scalar(argop));
79072805 6135 }
11343788 6136 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6137}
6138
6139OP *
cea2e8a9 6140Perl_ck_sort(pTHX_ OP *o)
79072805 6141{
8e3f9bdf 6142 OP *firstkid;
5dc0d613 6143 o->op_private = 0;
36477c24 6144#ifdef USE_LOCALE
3280af22 6145 if (PL_hints & HINT_LOCALE)
5dc0d613 6146 o->op_private |= OPpLOCALE;
bbce6d69 6147#endif
6148
9ea6e965 6149 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6150 simplify_sort(o);
8e3f9bdf
GS		 6151 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6152 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6153 OP *k;
8e3f9bdf 6154 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6155
463ee0b2 6156 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6157 linklist(kid);
463ee0b2
LW		 6158 if (kid->op_type == OP_SCOPE) {
6159 k = kid->op_next;
6160 kid->op_next = 0;
79072805 6161 }
463ee0b2 6162 else if (kid->op_type == OP_LEAVE) {
11343788 6163 if (o->op_type == OP_SORT) {
748a9306
LW		 6164 null(kid); /* wipe out leave */
6165 kid->op_next = kid;
463ee0b2 6166
748a9306
LW		 6167 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6168 if (k->op_next == kid)
6169 k->op_next = 0;
71a29c3c
GS		 6170 /* don't descend into loops */
6171 else if (k->op_type == OP_ENTERLOOP
6172 || k->op_type == OP_ENTERITER)
6173 {
6174 k = cLOOPx(k)->op_lastop;
6175 }
748a9306 6176 }
463ee0b2 6177 }
748a9306
LW		 6178 else
6179 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6180 k = kLISTOP->op_first;
463ee0b2 6181 }
a0d0e21e
LW		 6182 peep(k);
6183
8e3f9bdf
GS		 6184 kid = firstkid;
6185 if (o->op_type == OP_SORT) {
6186 /* provide scalar context for comparison function/block */
6187 kid = scalar(kid);
a0d0e21e 6188 kid->op_next = kid;
8e3f9bdf 6189 }
a0d0e21e
LW		 6190 else
6191 kid->op_next = k;
11343788 6192 o->op_flags |= OPf_SPECIAL;
79072805 6193 }
c6e96bcb 6194 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6195 null(firstkid);
6196
6197 firstkid = firstkid->op_sibling;
79072805 6198 }
bbce6d69 6199
8e3f9bdf
GS		 6200 /* provide list context for arguments */
6201 if (o->op_type == OP_SORT)
6202 list(firstkid);
6203
11343788 6204 return o;
79072805 6205}
bda4119b
GS		 6206
6207STATIC void
cea2e8a9 6208S_simplify_sort(pTHX_ OP *o)
9c007264 6209{
51a19bc0 6210 dTHR;
9c007264
JH		 6211 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6212 OP *k;
6213 int reversed;
350de78d 6214 GV *gv;
9c007264
JH		 6215 if (!(o->op_flags & OPf_STACKED))
6216 return;
1c846c1f
NIS		 6217 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6218 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6219 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6220 if (kid->op_type != OP_SCOPE)
6221 return;
6222 kid = kLISTOP->op_last; /* get past scope */
6223 switch(kid->op_type) {
6224 case OP_NCMP:
6225 case OP_I_NCMP:
6226 case OP_SCMP:
6227 break;
6228 default:
6229 return;
6230 }
6231 k = kid; /* remember this node*/
6232 if (kBINOP->op_first->op_type != OP_RV2SV)
6233 return;
6234 kid = kBINOP->op_first; /* get past cmp */
6235 if (kUNOP->op_first->op_type != OP_GV)
6236 return;
6237 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6238 gv = kGVOP_gv;
350de78d 6239 if (GvSTASH(gv) != PL_curstash)
9c007264 6240 return;
350de78d 6241 if (strEQ(GvNAME(gv), "a"))
9c007264 6242 reversed = 0;
0f79a09d 6243 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6244 reversed = 1;
6245 else
6246 return;
6247 kid = k; /* back to cmp */
6248 if (kBINOP->op_last->op_type != OP_RV2SV)
6249 return;
6250 kid = kBINOP->op_last; /* down to 2nd arg */
6251 if (kUNOP->op_first->op_type != OP_GV)
6252 return;
6253 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6254 gv = kGVOP_gv;
350de78d 6255 if (GvSTASH(gv) != PL_curstash
9c007264 6256 || ( reversed
350de78d
GS		 6257 ? strNE(GvNAME(gv), "a")
6258 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6259 return;
6260 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6261 if (reversed)
6262 o->op_private |= OPpSORT_REVERSE;
6263 if (k->op_type == OP_NCMP)
6264 o->op_private |= OPpSORT_NUMERIC;
6265 if (k->op_type == OP_I_NCMP)
6266 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6267 kid = cLISTOPo->op_first->op_sibling;
6268 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6269 op_free(kid); /* then delete it */
6270 cLISTOPo->op_children--;
9c007264 6271}
79072805
LW		 6272
6273OP *
cea2e8a9 6274Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6275{
6276 register OP *kid;
aeea060c 6277
11343788
MB		 6278 if (o->op_flags & OPf_STACKED)
6279 return no_fh_allowed(o);
79072805 6280
11343788 6281 kid = cLISTOPo->op_first;
8990e307 6282 if (kid->op_type != OP_NULL)
cea2e8a9 6283 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6284 kid = kid->op_sibling;
11343788
MB		 6285 op_free(cLISTOPo->op_first);
6286 cLISTOPo->op_first = kid;
85e6fe83 6287 if (!kid) {
79cb57f6 6288 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6289 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6290 }
79072805 6291
de4bf5b3 6292 if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) {
79072805 6293 OP *sibl = kid->op_sibling;
463ee0b2 6294 kid->op_sibling = 0;
79072805 6295 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6296 if (cLISTOPo->op_first == cLISTOPo->op_last)
6297 cLISTOPo->op_last = kid;
6298 cLISTOPo->op_first = kid;
79072805
LW		 6299 kid->op_sibling = sibl;
6300 }
6301
6302 kid->op_type = OP_PUSHRE;
22c35a8c 6303 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6304 scalar(kid);
6305
6306 if (!kid->op_sibling)
54b9620d 6307 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6308
6309 kid = kid->op_sibling;
6310 scalar(kid);
6311
6312 if (!kid->op_sibling)
11343788 6313 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6314
6315 kid = kid->op_sibling;
6316 scalar(kid);
6317
6318 if (kid->op_sibling)
22c35a8c 6319 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6320
11343788 6321 return o;
79072805
LW		 6322}
6323
6324OP *
1c846c1f 6325Perl_ck_join(pTHX_ OP *o)
eb6e2d6f
GS		 6326{
6327 if (ckWARN(WARN_SYNTAX)) {
6328 OP *kid = cLISTOPo->op_first->op_sibling;
6329 if (kid && kid->op_type == OP_MATCH) {
6330 char *pmstr = "STRING";
6331 if (kPMOP->op_pmregexp)
6332 pmstr = kPMOP->op_pmregexp->precomp;
6333 Perl_warner(aTHX_ WARN_SYNTAX,
6334 "/%s/ should probably be written as \"%s\"",
6335 pmstr, pmstr);
6336 }
6337 }
6338 return ck_fun(o);
6339}
6340
6341OP *
cea2e8a9 6342Perl_ck_subr(pTHX_ OP *o)
79072805 6343{
11343788
MB		 6344 dTHR;
6345 OP *prev = ((cUNOPo->op_first->op_sibling)
6346 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6347 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6348 OP *cvop;
6349 char *proto = 0;
6350 CV *cv = 0;
46fc3d4c 6351 GV *namegv = 0;
4633a7c4
LW		 6352 int optional = 0;
6353 I32 arg = 0;
2d8e6c8d 6354 STRLEN n_a;
4633a7c4 6355
d3011074 6356 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6357 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6358 if (cvop->op_type == OP_RV2CV) {
6359 SVOP* tmpop;
11343788 6360 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6361 null(cvop); /* disable rv2cv */
6362 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6363 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6364 GV *gv = cGVOPx_gv(tmpop);
350de78d 6365 cv = GvCVu(gv);
76cd736e
GS		 6366 if (!cv)
6367 tmpop->op_private |= OPpEARLY_CV;
6368 else if (SvPOK(cv)) {
350de78d 6369 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6370 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6371 }
4633a7c4
LW		 6372 }
6373 }
f5d5a27c 6374 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6375 if (o2->op_type == OP_CONST)
6376 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6377 else if (o2->op_type == OP_LIST) {
6378 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6379 if (o && o->op_type == OP_CONST)
6380 o->op_private &= ~OPpCONST_STRICT;
6381 }
7a52d87a 6382 }
3280af22
NIS		 6383 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6384 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6385 o->op_private |= OPpENTERSUB_DB;
6386 while (o2 != cvop) {
4633a7c4
LW		 6387 if (proto) {
6388 switch (*proto) {
6389 case '\0':
5dc0d613 6390 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6391 case ';':
6392 optional = 1;
6393 proto++;
6394 continue;
6395 case '$':
6396 proto++;
6397 arg++;
11343788 6398 scalar(o2);
4633a7c4
LW		 6399 break;
6400 case '%':
6401 case '@':
11343788 6402 list(o2);
4633a7c4
LW		 6403 arg++;
6404 break;
6405 case '&':
6406 proto++;
6407 arg++;
11343788 6408 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6409 bad_type(arg,
6410 arg == 1 ? "block or sub {}" : "sub {}",
6411 gv_ename(namegv), o2);
4633a7c4
LW		 6412 break;
6413 case '*':
2ba6ecf4 6414 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6415 proto++;
6416 arg++;
11343788 6417 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6418 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6419 else if (o2->op_type == OP_CONST)
6420 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6421 else if (o2->op_type == OP_ENTERSUB) {
6422 /* accidental subroutine, revert to bareword */
6423 OP *gvop = ((UNOP*)o2)->op_first;
6424 if (gvop && gvop->op_type == OP_NULL) {
6425 gvop = ((UNOP*)gvop)->op_first;
6426 if (gvop) {
6427 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6428 ;
6429 if (gvop &&
6430 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6431 (gvop = ((UNOP*)gvop)->op_first) &&
6432 gvop->op_type == OP_GV)
6433 {
638eceb6 6434 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6435 OP *sibling = o2->op_sibling;
2692f720 6436 SV *n = newSVpvn("",0);
9675f7ac 6437 op_free(o2);
2692f720
GS		 6438 gv_fullname3(n, gv, "");
6439 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6440 sv_chop(n, SvPVX(n)+6);
6441 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6442 prev->op_sibling = o2;
6443 o2->op_sibling = sibling;
6444 }
6445 }
6446 }
6447 }
2ba6ecf4
GS		 6448 scalar(o2);
6449 break;
4633a7c4
LW		 6450 case '\\':
6451 proto++;
6452 arg++;
6453 switch (*proto++) {
6454 case '*':
11343788 6455 if (o2->op_type != OP_RV2GV)
5dc0d613 6456 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6457 goto wrapref;
6458 case '&':
75fc29ea
GS		 6459 if (o2->op_type != OP_ENTERSUB)
6460 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6461 goto wrapref;
6462 case '$':
386acf99
GS		 6463 if (o2->op_type != OP_RV2SV
6464 && o2->op_type != OP_PADSV
1c01eb51
GS		 6465 && o2->op_type != OP_HELEM
6466 && o2->op_type != OP_AELEM
386acf99
GS		 6467 && o2->op_type != OP_THREADSV)
6468 {
5dc0d613 6469 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6470 }
4633a7c4
LW		 6471 goto wrapref;
6472 case '@':
11343788 6473 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6474 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6475 goto wrapref;
6476 case '%':
11343788 6477 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6478 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6479 wrapref:
6480 {
11343788 6481 OP* kid = o2;
6fa846a0 6482 OP* sib = kid->op_sibling;
4633a7c4 6483 kid->op_sibling = 0;
6fa846a0
GS		 6484 o2 = newUNOP(OP_REFGEN, 0, kid);
6485 o2->op_sibling = sib;
e858de61 6486 prev->op_sibling = o2;
4633a7c4
LW		 6487 }
6488 break;
6489 default: goto oops;
6490 }
6491 break;
b1cb66bf 6492 case ' ':
6493 proto++;
6494 continue;
4633a7c4
LW		 6495 default:
6496 oops:
cea2e8a9 6497 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6498 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6499 }
6500 }
6501 else
11343788
MB		 6502 list(o2);
6503 mod(o2, OP_ENTERSUB);
6504 prev = o2;
6505 o2 = o2->op_sibling;
4633a7c4 6506 }
fb73857a 6507 if (proto && !optional &&
6508 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6509 return too_few_arguments(o, gv_ename(namegv));
11343788 6510 return o;
79072805
LW		 6511}
6512
6513OP *
cea2e8a9 6514Perl_ck_svconst(pTHX_ OP *o)
8990e307 6515{
11343788
MB		 6516 SvREADONLY_on(cSVOPo->op_sv);
6517 return o;
8990e307
LW		 6518}
6519
6520OP *
cea2e8a9 6521Perl_ck_trunc(pTHX_ OP *o)
79072805 6522{
11343788
MB		 6523 if (o->op_flags & OPf_KIDS) {
6524 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6525
a0d0e21e
LW		 6526 if (kid->op_type == OP_NULL)
6527 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6528 if (kid && kid->op_type == OP_CONST &&
6529 (kid->op_private & OPpCONST_BARE))
6530 {
11343788 6531 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6532 kid->op_private &= ~OPpCONST_STRICT;
6533 }
79072805 6534 }
11343788 6535 return ck_fun(o);
79072805
LW		 6536}
6537
35fba0d9
RG		 6538OP *
6539Perl_ck_substr(pTHX_ OP *o)
6540{
6541 o = ck_fun(o);
6542 if ((o->op_flags & OPf_KIDS) && o->op_private == 4) {
6543 OP *kid = cLISTOPo->op_first;
6544
6545 if (kid->op_type == OP_NULL)
6546 kid = kid->op_sibling;
6547 if (kid)
6548 kid->op_flags |= OPf_MOD;
6549
6550 }
6551 return o;
6552}
6553
463ee0b2
LW		 6554/* A peephole optimizer. We visit the ops in the order they're to execute. */
6555
79072805 6556void
864dbfa3 6557Perl_peep(pTHX_ register OP *o)
79072805 6558{
11343788 6559 dTHR;
79072805 6560 register OP* oldop = 0;
2d8e6c8d 6561 STRLEN n_a;
cd06dffe 6562 OP *last_composite = Nullop;
2d8e6c8d 6563
a0d0e21e 6564 if (!o || o->op_seq)
79072805 6565 return;
a0d0e21e 6566 ENTER;
462e5cf6 6567 SAVEOP();
7766f137 6568 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6569 for (; o; o = o->op_next) {
6570 if (o->op_seq)
6571 break;
3280af22
NIS		 6572 if (!PL_op_seqmax)
6573 PL_op_seqmax++;
533c011a 6574 PL_op = o;
a0d0e21e 6575 switch (o->op_type) {
acb36ea4 6576 case OP_SETSTATE:
a0d0e21e
LW		 6577 case OP_NEXTSTATE:
6578 case OP_DBSTATE:
3280af22
NIS		 6579 PL_curcop = ((COP*)o); /* for warnings */
6580 o->op_seq = PL_op_seqmax++;
cd06dffe 6581 last_composite = Nullop;
a0d0e21e
LW		 6582 break;
6583
a0d0e21e 6584 case OP_CONST:
7a52d87a
GS		 6585 if (cSVOPo->op_private & OPpCONST_STRICT)
6586 no_bareword_allowed(o);
7766f137
GS		 6587#ifdef USE_ITHREADS
6588 /* Relocate sv to the pad for thread safety.
6589 * Despite being a "constant", the SV is written to,
6590 * for reference counts, sv_upgrade() etc. */
6591 if (cSVOP->op_sv) {
6592 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6593 if (SvPADTMP(cSVOPo->op_sv)) {
6594 /* If op_sv is already a PADTMP then it is being used by
9a049f1c 6595 * some pad, so make a copy. */
6a7129a1
GS		 6596 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6597 SvREADONLY_on(PL_curpad[ix]);
6598 SvREFCNT_dec(cSVOPo->op_sv);
6599 }
6600 else {
6601 SvREFCNT_dec(PL_curpad[ix]);
6602 SvPADTMP_on(cSVOPo->op_sv);
6603 PL_curpad[ix] = cSVOPo->op_sv;
9a049f1c
JT		 6604 /* XXX I don't know how this isn't readonly already. */
6605 SvREADONLY_on(PL_curpad[ix]);
6a7129a1 6606 }
7766f137
GS		 6607 cSVOPo->op_sv = Nullsv;
6608 o->op_targ = ix;
6609 }
6610#endif
07447971
GS		 6611 o->op_seq = PL_op_seqmax++;
6612 break;
6613
ed7ab888 6614 case OP_CONCAT:
b162f9ea
IZ		 6615 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6616 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6617 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6618 goto ignore_optimization;
cd06dffe 6619 else {
07447971 6620 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6621 o->op_targ = o->op_next->op_targ;
743e66e6 6622 o->op_next->op_targ = 0;
2c2d71f5 6623 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6624 }
6625 }
a0d0e21e 6626 null(o->op_next);
b162f9ea
IZ		 6627 }
6628 ignore_optimization:
3280af22 6629 o->op_seq = PL_op_seqmax++;
a0d0e21e 6630 break;
8990e307 6631 case OP_STUB:
54310121 6632 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6633 o->op_seq = PL_op_seqmax++;
54310121 6634 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6635 }
748a9306 6636 goto nothin;
79072805 6637 case OP_NULL:
acb36ea4
GS		 6638 if (o->op_targ == OP_NEXTSTATE
6639 || o->op_targ == OP_DBSTATE
6640 || o->op_targ == OP_SETSTATE)
6641 {
3280af22 6642 PL_curcop = ((COP*)o);
acb36ea4 6643 }
748a9306 6644 goto nothin;
79072805 6645 case OP_SCALAR:
93a17b20 6646 case OP_LINESEQ:
463ee0b2 6647 case OP_SCOPE:
748a9306 6648 nothin:
a0d0e21e
LW		 6649 if (oldop && o->op_next) {
6650 oldop->op_next = o->op_next;
79072805
LW		 6651 continue;
6652 }
3280af22 6653 o->op_seq = PL_op_seqmax++;
79072805
LW		 6654 break;
6655
6656 case OP_GV:
a0d0e21e 6657 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6658 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6659 null(o->op_next);
64aac5a9
GS		 6660 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6661 | OPpOUR_INTRO);
a0d0e21e
LW		 6662 o->op_next = o->op_next->op_next;
6663 o->op_type = OP_GVSV;
22c35a8c 6664 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6665 }
6666 }
a0d0e21e
LW		 6667 else if (o->op_next->op_type == OP_RV2AV) {
6668 OP* pop = o->op_next->op_next;
6669 IV i;
8990e307 6670 if (pop->op_type == OP_CONST &&
533c011a 6671 (PL_op = pop->op_next) &&
8990e307 6672 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6673 !(pop->op_next->op_private &
68dc0745 6674 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6675 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6676 <= 255 &&
8990e307
LW		 6677 i >= 0)
6678 {
350de78d 6679 GV *gv;
a0d0e21e 6680 null(o->op_next);
8990e307
LW		 6681 null(pop->op_next);
6682 null(pop);
a0d0e21e
LW		 6683 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6684 o->op_next = pop->op_next->op_next;
6685 o->op_type = OP_AELEMFAST;
22c35a8c 6686 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6687 o->op_private = (U8)i;
638eceb6 6688 gv = cGVOPo_gv;
350de78d 6689 GvAVn(gv);
8990e307 6690 }
79072805 6691 }
e476b1b5 6692 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6693 GV *gv = cGVOPo_gv;
76cd736e
GS		 6694 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6695 /* XXX could check prototype here instead of just carping */
6696 SV *sv = sv_newmortal();
6697 gv_efullname3(sv, gv, Nullch);
e476b1b5 6698 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6699 "%s() called too early to check prototype",
6700 SvPV_nolen(sv));
6701 }
6702 }
6703
3280af22 6704 o->op_seq = PL_op_seqmax++;
79072805
LW		 6705 break;
6706
a0d0e21e 6707 case OP_MAPWHILE:
79072805
LW		 6708 case OP_GREPWHILE:
6709 case OP_AND:
6710 case OP_OR:
2c2d71f5
JH		 6711 case OP_ANDASSIGN:
6712 case OP_ORASSIGN:
1a67a97c
SM		 6713 case OP_COND_EXPR:
6714 case OP_RANGE:
3280af22 6715 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6716 while (cLOGOP->op_other->op_type == OP_NULL)
6717 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6718 peep(cLOGOP->op_other);
6719 break;
6720
79072805 6721 case OP_ENTERLOOP:
3280af22 6722 o->op_seq = PL_op_seqmax++;
79072805
LW		 6723 peep(cLOOP->op_redoop);
6724 peep(cLOOP->op_nextop);
6725 peep(cLOOP->op_lastop);
6726 break;
6727
8782bef2 6728 case OP_QR:
79072805
LW		 6729 case OP_MATCH:
6730 case OP_SUBST:
3280af22 6731 o->op_seq = PL_op_seqmax++;
a0d0e21e 6732 peep(cPMOP->op_pmreplstart);
79072805
LW		 6733 break;
6734
a0d0e21e 6735 case OP_EXEC:
3280af22 6736 o->op_seq = PL_op_seqmax++;
1c846c1f 6737 if (ckWARN(WARN_SYNTAX) && o->op_next
599cee73 6738 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6739 if (o->op_next->op_sibling &&
20408e3c
GS		 6740 o->op_next->op_sibling->op_type != OP_EXIT &&
6741 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6742 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6743 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6744
57843af0 6745 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6746 Perl_warner(aTHX_ WARN_EXEC,
6747 "Statement unlikely to be reached");
6748 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6749 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6750 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6751 }
6752 }
6753 break;
aeea060c 6754
c750a3ec
MB		 6755 case OP_HELEM: {
6756 UNOP *rop;
6757 SV *lexname;
6758 GV **fields;
9615e741 6759 SV **svp, **indsvp, *sv;
c750a3ec 6760 I32 ind;
1c846c1f 6761 char *key = NULL;
c750a3ec 6762 STRLEN keylen;
aeea060c 6763
9615e741 6764 o->op_seq = PL_op_seqmax++;
1c846c1f
NIS		 6765
6766 if (((BINOP*)o)->op_last->op_type != OP_CONST)
c750a3ec 6767 break;
1c846c1f
NIS		 6768
6769 /* Make the CONST have a shared SV */
6770 svp = cSVOPx_svp(((BINOP*)o)->op_last);
3049cdab 6771 if ((!SvFAKE(sv = *svp) || !SvREADONLY(sv)) && !IS_PADCONST(sv)) {
1c846c1f
NIS		 6772 key = SvPV(sv, keylen);
6773 lexname = newSVpvn_share(key, keylen, 0);
6774 SvREFCNT_dec(sv);
6775 *svp = lexname;
6776 }
6777
6778 if ((o->op_private & (OPpLVAL_INTRO)))
6779 break;
6780
c750a3ec
MB		 6781 rop = (UNOP*)((BINOP*)o)->op_first;
6782 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6783 break;
3280af22 6784 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6785 if (!SvOBJECT(lexname))
6786 break;
5196be3e 6787 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6788 if (!fields || !GvHV(*fields))
6789 break;
c750a3ec
MB		 6790 key = SvPV(*svp, keylen);
6791 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6792 if (!indsvp) {
88e9b055 6793 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6794 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6795 }
6796 ind = SvIV(*indsvp);
6797 if (ind < 1)
cea2e8a9 6798 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6799 rop->op_type = OP_RV2AV;
22c35a8c 6800 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6801 o->op_type = OP_AELEM;
22c35a8c 6802 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6803 sv = newSViv(ind);
6804 if (SvREADONLY(*svp))
6805 SvREADONLY_on(sv);
6806 SvFLAGS(sv) |= (SvFLAGS(*svp)
6807 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6808 SvREFCNT_dec(*svp);
9615e741 6809 *svp = sv;
c750a3ec
MB		 6810 break;
6811 }
345599ca
GS		 6812
6813 case OP_HSLICE: {
6814 UNOP *rop;
6815 SV *lexname;
6816 GV **fields;
9615e741 6817 SV **svp, **indsvp, *sv;
345599ca
GS		 6818 I32 ind;
6819 char *key;
6820 STRLEN keylen;
6821 SVOP *first_key_op, *key_op;
9615e741
GS		 6822
6823 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6824 if ((o->op_private & (OPpLVAL_INTRO))
6825 /* I bet there's always a pushmark... */
6826 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6827 /* hmmm, no optimization if list contains only one key. */
6828 break;
6829 rop = (UNOP*)((LISTOP*)o)->op_last;
6830 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6831 break;
6832 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6833 if (!SvOBJECT(lexname))
6834 break;
6835 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6836 if (!fields || !GvHV(*fields))
6837 break;
6838 /* Again guessing that the pushmark can be jumped over.... */
6839 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6840 ->op_first->op_sibling;
6841 /* Check that the key list contains only constants. */
6842 for (key_op = first_key_op; key_op;
6843 key_op = (SVOP*)key_op->op_sibling)
6844 if (key_op->op_type != OP_CONST)
6845 break;
6846 if (key_op)
6847 break;
6848 rop->op_type = OP_RV2AV;
6849 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6850 o->op_type = OP_ASLICE;
6851 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6852 for (key_op = first_key_op; key_op;
6853 key_op = (SVOP*)key_op->op_sibling) {
6854 svp = cSVOPx_svp(key_op);
6855 key = SvPV(*svp, keylen);
6856 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6857 if (!indsvp) {
9615e741
GS		 6858 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6859 "in variable %s of type %s",
345599ca
GS		 6860 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6861 }
6862 ind = SvIV(*indsvp);
6863 if (ind < 1)
6864 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6865 sv = newSViv(ind);
6866 if (SvREADONLY(*svp))
6867 SvREADONLY_on(sv);
6868 SvFLAGS(sv) |= (SvFLAGS(*svp)
6869 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6870 SvREFCNT_dec(*svp);
9615e741 6871 *svp = sv;
345599ca
GS		 6872 }
6873 break;
6874 }
c750a3ec 6875
cd06dffe
GS		 6876 case OP_RV2AV:
6877 case OP_RV2HV:
6878 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6879 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6880 {
cd06dffe 6881 last_composite = o;
e1f15930 6882 }
cd06dffe
GS		 6883 o->op_seq = PL_op_seqmax++;
6884 break;
6885
6886 case OP_RETURN:
970c4905 6887 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6888 o->op_seq = PL_op_seqmax++;
6889 break;
6890 }
6891 /* FALL THROUGH */
6892
6893 case OP_LEAVESUBLV:
6894 if (last_composite) {
6895 OP *r = last_composite;
6896
6897 while (r->op_sibling)
6898 r = r->op_sibling;
1c846c1f 6899 if (r->op_next == o
cd06dffe
GS		 6900 || (r->op_next->op_type == OP_LIST
6901 && r->op_next->op_next == o))
6902 {
6903 if (last_composite->op_type == OP_RV2AV)
6904 yyerror("Lvalue subs returning arrays not implemented yet");
6905 else
6906 yyerror("Lvalue subs returning hashes not implemented yet");
6907 ;
6908 }
6909 }
6910 /* FALL THROUGH */
6911
79072805 6912 default:
3280af22 6913 o->op_seq = PL_op_seqmax++;
79072805
LW		 6914 break;
6915 }
a0d0e21e 6916 oldop = o;
79072805 6917 }
a0d0e21e 6918 LEAVE;
79072805 6919}
beab0874
JT		 6920
6921#include "XSUB.h"
6922
6923/* Efficient sub that returns a constant scalar value. */
6924static void
6925const_sv_xsub(pTHXo_ CV* cv)
6926{
6927 dXSARGS;
9a049f1c
JT		 6928 EXTEND(sp, 1);
6929 ST(0) = sv_2mortal(SvREFCNT_inc((SV*)XSANY.any_ptr));
beab0874
JT		 6930 XSRETURN(1);
6931}
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