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fix memory leak in method call optimization (change#3768);
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e 24
b7dc083c
NIS		 25#ifdef PL_OP_SLAB_ALLOC
26#define SLAB_SIZE 8192
27static char *PL_OpPtr = NULL;
28static int PL_OpSpace = 0;
29#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
30 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
31 else \
32 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
33 } while (0)
34
864dbfa3 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 37{
38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
b7dc083c
NIS		 43#else
44#define NewOp(m, var, c, type) Newz(m, var, c, type)
45#endif
e50aee73 46/*
5dc0d613 47 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 48 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 49 */
11343788 50#define CHECKOP(type,o) \
3280af22 51 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 52 ? ( op_free((OP*)o), \
cea2e8a9 53 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 54 Nullop ) \
fc0dc3b3 55 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 56
c53d7c7d
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
33633739
GS		 153 "\"%s\" variable %s masks earlier declaration in same %s",
154 (PL_in_my == KEY_our ? "our" : "my"),
155 name,
156 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
157 --off;
158 break;
159 }
160 }
161 if (PL_in_my == KEY_our) {
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);
743e66e6 498 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 499 break;
500 }
3280af22 501 retval = PL_padix;
79072805 502 }
8990e307 503 SvFLAGS(sv) |= tmptype;
3280af22 504 PL_curpad = AvARRAY(PL_comppad);
11343788 505#ifdef USE_THREADS
b900a521
JH		 506 DEBUG_X(PerlIO_printf(Perl_debug_log,
507 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
508 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 509 (long) retval, PL_op_name[optype]));
11343788 510#else
b900a521
JH		 511 DEBUG_X(PerlIO_printf(Perl_debug_log,
512 "Pad 0x%"UVxf" alloc %ld for %s\n",
513 PTR2UV(PL_curpad),
22c35a8c 514 (long) retval, PL_op_name[optype]));
11343788 515#endif /* USE_THREADS */
79072805
LW		 516 return (PADOFFSET)retval;
517}
518
519SV *
864dbfa3 520Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 521{
11343788
MB		 522 dTHR;
523#ifdef USE_THREADS
b900a521 524 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 525 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
526 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 527#else
79072805 528 if (!po)
cea2e8a9 529 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 530 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
531 PTR2UV(PL_curpad), (IV)po));
11343788 532#endif /* USE_THREADS */
3280af22 533 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 534}
535
536void
864dbfa3 537Perl_pad_free(pTHX_ PADOFFSET po)
79072805 538{
11343788 539 dTHR;
3280af22 540 if (!PL_curpad)
a0d0e21e 541 return;
3280af22 542 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 543 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 544 if (!po)
cea2e8a9 545 Perl_croak(aTHX_ "panic: pad_free po");
11343788 546#ifdef USE_THREADS
b900a521 547 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 548 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 549 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 550#else
97835f67
JH		 551 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
552 PTR2UV(PL_curpad), (IV)po));
11343788 553#endif /* USE_THREADS */
2aa1bedc 554 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 555 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 556#ifdef USE_ITHREADS
557 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
558#endif
559 }
3280af22
NIS		 560 if ((I32)po < PL_padix)
561 PL_padix = po - 1;
79072805
LW		 562}
563
564void
864dbfa3 565Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 566{
11343788 567 dTHR;
3280af22 568 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 569 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 570 if (!po)
cea2e8a9 571 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 572#ifdef USE_THREADS
b900a521 573 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 574 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
575 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 576#else
97835f67
JH		 577 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
578 PTR2UV(PL_curpad), (IV)po));
11343788 579#endif /* USE_THREADS */
3280af22
NIS		 580 SvPADTMP_off(PL_curpad[po]);
581 PL_curpad[po] = NEWSV(1107,0);
582 SvPADTMP_on(PL_curpad[po]);
583 if ((I32)po < PL_padix)
584 PL_padix = po - 1;
79072805
LW		 585}
586
d9bb4600
GS		 587/* XXX pad_reset() is currently disabled because it results in serious bugs.
588 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
589 * on the stack by OPs that use them, there are several ways to get an alias
590 * to a shared TARG. Such an alias will change randomly and unpredictably.
591 * We avoid doing this until we can think of a Better Way.
592 * GSAR 97-10-29 */
79072805 593void
864dbfa3 594Perl_pad_reset(pTHX)
79072805 595{
d9bb4600 596#ifdef USE_BROKEN_PAD_RESET
11343788 597 dTHR;
79072805
LW		 598 register I32 po;
599
6b88bc9c 600 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 601 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 602#ifdef USE_THREADS
b900a521
JH		 603 DEBUG_X(PerlIO_printf(Perl_debug_log,
604 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
605 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 606#else
b900a521
JH		 607 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
608 PTR2UV(PL_curpad)));
11343788 609#endif /* USE_THREADS */
6b88bc9c
GS		 610 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
611 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
612 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
613 SvPADTMP_off(PL_curpad[po]);
748a9306 614 }
6b88bc9c 615 PL_padix = PL_padix_floor;
79072805 616 }
d9bb4600 617#endif
3280af22 618 PL_pad_reset_pending = FALSE;
79072805
LW		 619}
620
a863c7d1 621#ifdef USE_THREADS
54b9620d 622/* find_threadsv is not reentrant */
a863c7d1 623PADOFFSET
864dbfa3 624Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 625{
626 dTHR;
627 char *p;
628 PADOFFSET key;
554b3eca 629 SV **svp;
54b9620d 630 /* We currently only handle names of a single character */
533c011a 631 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 632 if (!p)
633 return NOT_IN_PAD;
533c011a 634 key = p - PL_threadsv_names;
2d8e6c8d 635 MUTEX_LOCK(&thr->mutex);
54b9620d 636 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 637 if (svp)
638 MUTEX_UNLOCK(&thr->mutex);
639 else {
554b3eca 640 SV *sv = NEWSV(0, 0);
54b9620d 641 av_store(thr->threadsv, key, sv);
940cb80d 642 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 643 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 644 /*
645 * Some magic variables used to be automagically initialised
646 * in gv_fetchpv. Those which are now per-thread magicals get
647 * initialised here instead.
648 */
649 switch (*name) {
54b9620d
MB		 650 case '_':
651 break;
554b3eca
MB		 652 case ';':
653 sv_setpv(sv, "\034");
54b9620d 654 sv_magic(sv, 0, 0, name, 1);
554b3eca 655 break;
c277df42
IZ		 656 case '&':
657 case '`':
658 case '\'':
533c011a 659 PL_sawampersand = TRUE;
a3f914c5
GS		 660 /* FALL THROUGH */
661 case '1':
662 case '2':
663 case '3':
664 case '4':
665 case '5':
666 case '6':
667 case '7':
668 case '8':
669 case '9':
c277df42 670 SvREADONLY_on(sv);
d8b5173a 671 /* FALL THROUGH */
067391ea
GS		 672
673 /* XXX %! tied to Errno.pm needs to be added here.
674 * See gv_fetchpv(). */
675 /* case '!': */
676
54b9620d
MB		 677 default:
678 sv_magic(sv, 0, 0, name, 1);
554b3eca 679 }
bf49b057 680 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 681 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 682 sv, (*name < 32) ? "^" : "",
683 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 684 }
685 return key;
686}
687#endif /* USE_THREADS */
688
79072805
LW		 689/* Destructor */
690
691void
864dbfa3 692Perl_op_free(pTHX_ OP *o)
79072805 693{
85e6fe83 694 register OP *kid, *nextkid;
acb36ea4 695 OPCODE type;
79072805 696
5dc0d613 697 if (!o || o->op_seq == (U16)-1)
79072805
LW		 698 return;
699
7934575e
GS		 700 if (o->op_private & OPpREFCOUNTED) {
701 switch (o->op_type) {
702 case OP_LEAVESUB:
703 case OP_LEAVESUBLV:
704 case OP_LEAVEEVAL:
705 case OP_LEAVE:
706 case OP_SCOPE:
707 case OP_LEAVEWRITE:
708 OP_REFCNT_LOCK;
709 if (OpREFCNT_dec(o)) {
710 OP_REFCNT_UNLOCK;
711 return;
712 }
713 OP_REFCNT_UNLOCK;
714 break;
715 default:
716 break;
717 }
718 }
719
11343788
MB		 720 if (o->op_flags & OPf_KIDS) {
721 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 722 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 723 op_free(kid);
85e6fe83 724 }
79072805 725 }
acb36ea4
GS		 726 type = o->op_type;
727 if (type == OP_NULL)
728 type = o->op_targ;
729
730 /* COP* is not cleared by op_clear() so that we may track line
731 * numbers etc even after null() */
732 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
733 cop_free((COP*)o);
734
735 op_clear(o);
736
737#ifdef PL_OP_SLAB_ALLOC
738 if ((char *) o == PL_OpPtr)
739 {
740 }
741#else
742 Safefree(o);
743#endif
744}
79072805 745
acb36ea4
GS		 746STATIC void
747S_op_clear(pTHX_ OP *o)
748{
11343788 749 switch (o->op_type) {
acb36ea4
GS		 750 case OP_NULL: /* Was holding old type, if any. */
751 case OP_ENTEREVAL: /* Was holding hints. */
752#ifdef USE_THREADS
753 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
754#endif
755 o->op_targ = 0;
a0d0e21e 756 break;
554b3eca 757#ifdef USE_THREADS
8dd3ba40
SM		 758 case OP_ENTERITER:
759 if (!(o->op_flags & OPf_SPECIAL))
760 break;
761 /* FALL THROUGH */
554b3eca 762#endif /* USE_THREADS */
a6006777 763 default:
ac4c12e7 764 if (!(o->op_flags & OPf_REF)
0b94c7bb 765 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 766 break;
767 /* FALL THROUGH */
463ee0b2 768 case OP_GVSV:
79072805 769 case OP_GV:
a6006777 770 case OP_AELEMFAST:
350de78d 771#ifdef USE_ITHREADS
971a9dd3
GS		 772 if (cPADOPo->op_padix > 0) {
773 if (PL_curpad) {
638eceb6 774 GV *gv = cGVOPo_gv;
971a9dd3
GS		 775 pad_swipe(cPADOPo->op_padix);
776 /* No GvIN_PAD_off(gv) here, because other references may still
777 * exist on the pad */
778 SvREFCNT_dec(gv);
779 }
780 cPADOPo->op_padix = 0;
781 }
350de78d 782#else
971a9dd3 783 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 784 cSVOPo->op_sv = Nullsv;
350de78d 785#endif
79072805 786 break;
a1ae71d2 787 case OP_METHOD_NAMED:
79072805 788 case OP_CONST:
11343788 789 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 790 cSVOPo->op_sv = Nullsv;
79072805 791 break;
748a9306
LW		 792 case OP_GOTO:
793 case OP_NEXT:
794 case OP_LAST:
795 case OP_REDO:
11343788 796 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 797 break;
798 /* FALL THROUGH */
a0d0e21e 799 case OP_TRANS:
acb36ea4 800 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 801 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 802 cSVOPo->op_sv = Nullsv;
803 }
804 else {
a0ed51b3 805 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 806 cPVOPo->op_pv = Nullch;
807 }
a0d0e21e
LW		 808 break;
809 case OP_SUBST:
11343788 810 op_free(cPMOPo->op_pmreplroot);
971a9dd3 811 goto clear_pmop;
748a9306 812 case OP_PUSHRE:
971a9dd3
GS		 813#ifdef USE_ITHREADS
814 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
815 if (PL_curpad) {
816 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
817 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
818 /* No GvIN_PAD_off(gv) here, because other references may still
819 * exist on the pad */
820 SvREFCNT_dec(gv);
821 }
822 }
823#else
824 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
825#endif
826 /* FALL THROUGH */
a0d0e21e 827 case OP_MATCH:
8782bef2 828 case OP_QR:
971a9dd3
GS		 829clear_pmop:
830 cPMOPo->op_pmreplroot = Nullop;
c277df42 831 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 832 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 833 break;
79072805
LW		 834 }
835
743e66e6 836 if (o->op_targ > 0) {
11343788 837 pad_free(o->op_targ);
743e66e6
GS		 838 o->op_targ = 0;
839 }
79072805
LW		 840}
841
76e3520e 842STATIC void
3eb57f73
HS		 843S_cop_free(pTHX_ COP* cop)
844{
845 Safefree(cop->cop_label);
57843af0
GS		 846#ifdef USE_ITHREADS
847 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 848 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 849#else
11faa288 850 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 851 SvREFCNT_dec(CopFILEGV(cop));
57843af0 852#endif
0453d815 853 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 854 SvREFCNT_dec(cop->cop_warnings);
855}
856
857STATIC void
cea2e8a9 858S_null(pTHX_ OP *o)
8990e307 859{
acb36ea4
GS		 860 if (o->op_type == OP_NULL)
861 return;
862 op_clear(o);
11343788
MB		 863 o->op_targ = o->op_type;
864 o->op_type = OP_NULL;
22c35a8c 865 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 866}
867
79072805
LW		 868/* Contextualizers */
869
463ee0b2 870#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 871
872OP *
864dbfa3 873Perl_linklist(pTHX_ OP *o)
79072805
LW		 874{
875 register OP *kid;
876
11343788
MB		 877 if (o->op_next)
878 return o->op_next;
79072805
LW		 879
880 /* establish postfix order */
11343788
MB		 881 if (cUNOPo->op_first) {
882 o->op_next = LINKLIST(cUNOPo->op_first);
883 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 884 if (kid->op_sibling)
885 kid->op_next = LINKLIST(kid->op_sibling);
886 else
11343788 887 kid->op_next = o;
79072805
LW		 888 }
889 }
890 else
11343788 891 o->op_next = o;
79072805 892
11343788 893 return o->op_next;
79072805
LW		 894}
895
896OP *
864dbfa3 897Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 898{
899 OP *kid;
11343788
MB		 900 if (o && o->op_flags & OPf_KIDS) {
901 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 902 scalar(kid);
903 }
11343788 904 return o;
79072805
LW		 905}
906
76e3520e 907STATIC OP *
cea2e8a9 908S_scalarboolean(pTHX_ OP *o)
8990e307 909{
d008e5eb 910 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 911 dTHR;
d008e5eb 912 if (ckWARN(WARN_SYNTAX)) {
57843af0 913 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 914
d008e5eb 915 if (PL_copline != NOLINE)
57843af0 916 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 917 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 918 CopLINE_set(PL_curcop, oldline);
d008e5eb 919 }
a0d0e21e 920 }
11343788 921 return scalar(o);
8990e307
LW		 922}
923
924OP *
864dbfa3 925Perl_scalar(pTHX_ OP *o)
79072805
LW		 926{
927 OP *kid;
928
a0d0e21e 929 /* assumes no premature commitment */
3280af22 930 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 931 || o->op_type == OP_RETURN)
7e363e51 932 {
11343788 933 return o;
7e363e51 934 }
79072805 935
5dc0d613 936 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 937
11343788 938 switch (o->op_type) {
79072805 939 case OP_REPEAT:
11343788
MB		 940 if (o->op_private & OPpREPEAT_DOLIST)
941 null(((LISTOP*)cBINOPo->op_first)->op_first);
942 scalar(cBINOPo->op_first);
8990e307 943 break;
79072805
LW		 944 case OP_OR:
945 case OP_AND:
946 case OP_COND_EXPR:
11343788 947 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 948 scalar(kid);
79072805 949 break;
a0d0e21e 950 case OP_SPLIT:
11343788 951 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 952 if (!kPMOP->op_pmreplroot)
953 deprecate("implicit split to @_");
954 }
955 /* FALL THROUGH */
79072805 956 case OP_MATCH:
8782bef2 957 case OP_QR:
79072805
LW		 958 case OP_SUBST:
959 case OP_NULL:
8990e307 960 default:
11343788
MB		 961 if (o->op_flags & OPf_KIDS) {
962 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 963 scalar(kid);
964 }
79072805
LW		 965 break;
966 case OP_LEAVE:
967 case OP_LEAVETRY:
5dc0d613 968 kid = cLISTOPo->op_first;
54310121 969 scalar(kid);
155aba94 970 while ((kid = kid->op_sibling)) {
54310121 971 if (kid->op_sibling)
972 scalarvoid(kid);
973 else
974 scalar(kid);
975 }
3280af22 976 WITH_THR(PL_curcop = &PL_compiling);
54310121 977 break;
748a9306 978 case OP_SCOPE:
79072805 979 case OP_LINESEQ:
8990e307 980 case OP_LIST:
11343788 981 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 982 if (kid->op_sibling)
983 scalarvoid(kid);
984 else
985 scalar(kid);
986 }
3280af22 987 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 988 break;
989 }
11343788 990 return o;
79072805
LW		 991}
992
993OP *
864dbfa3 994Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 995{
996 OP *kid;
8990e307
LW		 997 char* useless = 0;
998 SV* sv;
2ebea0a1
GS		 999 U8 want;
1000
acb36ea4
GS		 1001 if (o->op_type == OP_NEXTSTATE
1002 || o->op_type == OP_SETSTATE
1003 || o->op_type == OP_DBSTATE
1004 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1005 || o->op_targ == OP_SETSTATE
1006 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1007 {
1008 dTHR;
1009 PL_curcop = (COP*)o; /* for warning below */
1010 }
79072805 1011
54310121 1012 /* assumes no premature commitment */
2ebea0a1
GS		 1013 want = o->op_flags & OPf_WANT;
1014 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1015 || o->op_type == OP_RETURN)
7e363e51 1016 {
11343788 1017 return o;
7e363e51 1018 }
79072805 1019
b162f9ea 1020 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1021 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1022 {
b162f9ea 1023 return scalar(o); /* As if inside SASSIGN */
7e363e51 1024 }
b162f9ea 1025
5dc0d613 1026 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1027
11343788 1028 switch (o->op_type) {
79072805 1029 default:
22c35a8c 1030 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1031 break;
36477c24 1032 /* FALL THROUGH */
1033 case OP_REPEAT:
11343788 1034 if (o->op_flags & OPf_STACKED)
8990e307 1035 break;
5d82c453
GA		 1036 goto func_ops;
1037 case OP_SUBSTR:
1038 if (o->op_private == 4)
1039 break;
8990e307
LW		 1040 /* FALL THROUGH */
1041 case OP_GVSV:
1042 case OP_WANTARRAY:
1043 case OP_GV:
1044 case OP_PADSV:
1045 case OP_PADAV:
1046 case OP_PADHV:
1047 case OP_PADANY:
1048 case OP_AV2ARYLEN:
8990e307 1049 case OP_REF:
a0d0e21e
LW		 1050 case OP_REFGEN:
1051 case OP_SREFGEN:
8990e307
LW		 1052 case OP_DEFINED:
1053 case OP_HEX:
1054 case OP_OCT:
1055 case OP_LENGTH:
8990e307
LW		 1056 case OP_VEC:
1057 case OP_INDEX:
1058 case OP_RINDEX:
1059 case OP_SPRINTF:
1060 case OP_AELEM:
1061 case OP_AELEMFAST:
1062 case OP_ASLICE:
8990e307
LW		 1063 case OP_HELEM:
1064 case OP_HSLICE:
1065 case OP_UNPACK:
1066 case OP_PACK:
8990e307
LW		 1067 case OP_JOIN:
1068 case OP_LSLICE:
1069 case OP_ANONLIST:
1070 case OP_ANONHASH:
1071 case OP_SORT:
1072 case OP_REVERSE:
1073 case OP_RANGE:
1074 case OP_FLIP:
1075 case OP_FLOP:
1076 case OP_CALLER:
1077 case OP_FILENO:
1078 case OP_EOF:
1079 case OP_TELL:
1080 case OP_GETSOCKNAME:
1081 case OP_GETPEERNAME:
1082 case OP_READLINK:
1083 case OP_TELLDIR:
1084 case OP_GETPPID:
1085 case OP_GETPGRP:
1086 case OP_GETPRIORITY:
1087 case OP_TIME:
1088 case OP_TMS:
1089 case OP_LOCALTIME:
1090 case OP_GMTIME:
1091 case OP_GHBYNAME:
1092 case OP_GHBYADDR:
1093 case OP_GHOSTENT:
1094 case OP_GNBYNAME:
1095 case OP_GNBYADDR:
1096 case OP_GNETENT:
1097 case OP_GPBYNAME:
1098 case OP_GPBYNUMBER:
1099 case OP_GPROTOENT:
1100 case OP_GSBYNAME:
1101 case OP_GSBYPORT:
1102 case OP_GSERVENT:
1103 case OP_GPWNAM:
1104 case OP_GPWUID:
1105 case OP_GGRNAM:
1106 case OP_GGRGID:
1107 case OP_GETLOGIN:
5d82c453 1108 func_ops:
64aac5a9 1109 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1110 useless = PL_op_desc[o->op_type];
8990e307
LW		 1111 break;
1112
1113 case OP_RV2GV:
1114 case OP_RV2SV:
1115 case OP_RV2AV:
1116 case OP_RV2HV:
192587c2 1117 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1118 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1119 useless = "a variable";
1120 break;
79072805
LW		 1121
1122 case OP_CONST:
7766f137 1123 sv = cSVOPo_sv;
7a52d87a
GS		 1124 if (cSVOPo->op_private & OPpCONST_STRICT)
1125 no_bareword_allowed(o);
1126 else {
d008e5eb
GS		 1127 dTHR;
1128 if (ckWARN(WARN_VOID)) {
1129 useless = "a constant";
1130 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1131 useless = 0;
1132 else if (SvPOK(sv)) {
1133 if (strnEQ(SvPVX(sv), "di", 2) ||
1134 strnEQ(SvPVX(sv), "ds", 2) ||
1135 strnEQ(SvPVX(sv), "ig", 2))
1136 useless = 0;
1137 }
8990e307
LW		 1138 }
1139 }
acb36ea4 1140 null(o); /* don't execute or even remember it */
79072805
LW		 1141 break;
1142
1143 case OP_POSTINC:
11343788 1144 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1145 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1146 break;
1147
1148 case OP_POSTDEC:
11343788 1149 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1150 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1151 break;
1152
79072805
LW		 1153 case OP_OR:
1154 case OP_AND:
1155 case OP_COND_EXPR:
11343788 1156 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1157 scalarvoid(kid);
1158 break;
5aabfad6 1159
a0d0e21e 1160 case OP_NULL:
11343788 1161 if (o->op_flags & OPf_STACKED)
a0d0e21e 1162 break;
5aabfad6 1163 /* FALL THROUGH */
2ebea0a1
GS		 1164 case OP_NEXTSTATE:
1165 case OP_DBSTATE:
79072805
LW		 1166 case OP_ENTERTRY:
1167 case OP_ENTER:
1168 case OP_SCALAR:
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
MB		 1186 o->op_flags &= ~OPf_WANT;
1187 return scalar(o);
a0d0e21e 1188 case OP_SPLIT:
11343788 1189 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1190 if (!kPMOP->op_pmreplroot)
1191 deprecate("implicit split to @_");
1192 }
1193 break;
79072805 1194 }
d008e5eb
GS		 1195 if (useless) {
1196 dTHR;
1197 if (ckWARN(WARN_VOID))
cea2e8a9 1198 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1199 }
11343788 1200 return o;
79072805
LW		 1201}
1202
1203OP *
864dbfa3 1204Perl_listkids(pTHX_ OP *o)
79072805
LW		 1205{
1206 OP *kid;
11343788
MB		 1207 if (o && o->op_flags & OPf_KIDS) {
1208 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1209 list(kid);
1210 }
11343788 1211 return o;
79072805
LW		 1212}
1213
1214OP *
864dbfa3 1215Perl_list(pTHX_ OP *o)
79072805
LW		 1216{
1217 OP *kid;
1218
a0d0e21e 1219 /* assumes no premature commitment */
3280af22 1220 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1221 || o->op_type == OP_RETURN)
7e363e51 1222 {
11343788 1223 return o;
7e363e51 1224 }
79072805 1225
b162f9ea 1226 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1227 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1228 {
b162f9ea 1229 return o; /* As if inside SASSIGN */
7e363e51 1230 }
b162f9ea 1231
5dc0d613 1232 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1233
11343788 1234 switch (o->op_type) {
79072805
LW		 1235 case OP_FLOP:
1236 case OP_REPEAT:
11343788 1237 list(cBINOPo->op_first);
79072805
LW		 1238 break;
1239 case OP_OR:
1240 case OP_AND:
1241 case OP_COND_EXPR:
11343788 1242 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1243 list(kid);
1244 break;
1245 default:
1246 case OP_MATCH:
8782bef2 1247 case OP_QR:
79072805
LW		 1248 case OP_SUBST:
1249 case OP_NULL:
11343788 1250 if (!(o->op_flags & OPf_KIDS))
79072805 1251 break;
11343788
MB		 1252 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1253 list(cBINOPo->op_first);
1254 return gen_constant_list(o);
79072805
LW		 1255 }
1256 case OP_LIST:
11343788 1257 listkids(o);
79072805
LW		 1258 break;
1259 case OP_LEAVE:
1260 case OP_LEAVETRY:
5dc0d613 1261 kid = cLISTOPo->op_first;
54310121 1262 list(kid);
155aba94 1263 while ((kid = kid->op_sibling)) {
54310121 1264 if (kid->op_sibling)
1265 scalarvoid(kid);
1266 else
1267 list(kid);
1268 }
3280af22 1269 WITH_THR(PL_curcop = &PL_compiling);
54310121 1270 break;
748a9306 1271 case OP_SCOPE:
79072805 1272 case OP_LINESEQ:
11343788 1273 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1274 if (kid->op_sibling)
1275 scalarvoid(kid);
1276 else
1277 list(kid);
1278 }
3280af22 1279 WITH_THR(PL_curcop = &PL_compiling);
79072805 1280 break;
c90c0ff4 1281 case OP_REQUIRE:
1282 /* all requires must return a boolean value */
5196be3e
MB		 1283 o->op_flags &= ~OPf_WANT;
1284 return scalar(o);
79072805 1285 }
11343788 1286 return o;
79072805
LW		 1287}
1288
1289OP *
864dbfa3 1290Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1291{
1292 OP *kid;
1293
11343788
MB		 1294 if (o) {
1295 if (o->op_type == OP_LINESEQ ||
1296 o->op_type == OP_SCOPE ||
1297 o->op_type == OP_LEAVE ||
1298 o->op_type == OP_LEAVETRY)
463ee0b2 1299 {
0f15f207 1300 dTHR;
11343788 1301 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1302 if (kid->op_sibling) {
463ee0b2 1303 scalarvoid(kid);
ed6116ce 1304 }
463ee0b2 1305 }
3280af22 1306 PL_curcop = &PL_compiling;
79072805 1307 }
11343788 1308 o->op_flags &= ~OPf_PARENS;
3280af22 1309 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1310 o->op_flags |= OPf_PARENS;
79072805 1311 }
8990e307 1312 else
11343788
MB		 1313 o = newOP(OP_STUB, 0);
1314 return o;
79072805
LW		 1315}
1316
76e3520e 1317STATIC OP *
cea2e8a9 1318S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1319{
1320 OP *kid;
11343788
MB		 1321 if (o && o->op_flags & OPf_KIDS) {
1322 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1323 mod(kid, type);
79072805 1324 }
11343788 1325 return o;
79072805
LW		 1326}
1327
79072805 1328OP *
864dbfa3 1329Perl_mod(pTHX_ OP *o, I32 type)
79072805 1330{
11343788 1331 dTHR;
79072805 1332 OP *kid;
2d8e6c8d 1333 STRLEN n_a;
79072805 1334
3280af22 1335 if (!o || PL_error_count)
11343788 1336 return o;
79072805 1337
b162f9ea 1338 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1339 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1340 {
b162f9ea 1341 return o;
7e363e51 1342 }
b162f9ea 1343
11343788 1344 switch (o->op_type) {
68dc0745 1345 case OP_UNDEF:
3280af22 1346 PL_modcount++;
5dc0d613 1347 return o;
a0d0e21e 1348 case OP_CONST:
11343788 1349 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1350 goto nomod;
3280af22 1351 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1352 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1353 PL_eval_start = 0;
a0d0e21e
LW		 1354 }
1355 else if (!type) {
3280af22
NIS		 1356 SAVEI32(PL_compiling.cop_arybase);
1357 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1358 }
1359 else if (type == OP_REFGEN)
1360 goto nomod;
1361 else
cea2e8a9 1362 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1363 break;
5f05dabc 1364 case OP_STUB:
5196be3e 1365 if (o->op_flags & OPf_PARENS)
5f05dabc 1366 break;
1367 goto nomod;
a0d0e21e
LW		 1368 case OP_ENTERSUB:
1369 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1370 !(o->op_flags & OPf_STACKED)) {
1371 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1372 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1373 assert(cUNOPo->op_first->op_type == OP_NULL);
1374 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1375 break;
1376 }
cd06dffe
GS		 1377 else { /* lvalue subroutine call */
1378 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1379 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1380 /* Backward compatibility mode: */
1381 o->op_private |= OPpENTERSUB_INARGS;
1382 break;
1383 }
1384 else { /* Compile-time error message: */
1385 OP *kid = cUNOPo->op_first;
1386 CV *cv;
1387 OP *okid;
1388
1389 if (kid->op_type == OP_PUSHMARK)
1390 goto skip_kids;
1391 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1392 Perl_croak(aTHX_
1393 "panic: unexpected lvalue entersub "
1394 "args: type/targ %ld:%ld",
1395 (long)kid->op_type,kid->op_targ);
1396 kid = kLISTOP->op_first;
1397 skip_kids:
1398 while (kid->op_sibling)
1399 kid = kid->op_sibling;
1400 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1401 /* Indirect call */
1402 if (kid->op_type == OP_METHOD_NAMED
1403 || kid->op_type == OP_METHOD)
1404 {
87d7fd28 1405 UNOP *newop;
cd06dffe
GS		 1406
1407 if (kid->op_sibling || kid->op_next != kid) {
1408 yyerror("panic: unexpected optree near method call");
1409 break;
1410 }
1411
87d7fd28 1412 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1413 newop->op_type = OP_RV2CV;
1414 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1415 newop->op_first = Nullop;
1416 newop->op_next = (OP*)newop;
1417 kid->op_sibling = (OP*)newop;
349fd7b7 1418 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1419 break;
1420 }
1421
1422 if (kid->op_type != OP_RV2CV)
1423 Perl_croak(aTHX_
1424 "panic: unexpected lvalue entersub "
1425 "entry via type/targ %ld:%ld",
1426 (long)kid->op_type,kid->op_targ);
1427 kid->op_private |= OPpLVAL_INTRO;
1428 break; /* Postpone until runtime */
1429 }
1430
1431 okid = kid;
1432 kid = kUNOP->op_first;
1433 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1434 kid = kUNOP->op_first;
1435 if (kid->op_type == OP_NULL)
1436 Perl_croak(aTHX_
1437 "Unexpected constant lvalue entersub "
1438 "entry via type/targ %ld:%ld",
1439 (long)kid->op_type,kid->op_targ);
1440 if (kid->op_type != OP_GV) {
1441 /* Restore RV2CV to check lvalueness */
1442 restore_2cv:
1443 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1444 okid->op_next = kid->op_next;
1445 kid->op_next = okid;
1446 }
1447 else
1448 okid->op_next = Nullop;
1449 okid->op_type = OP_RV2CV;
1450 okid->op_targ = 0;
1451 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1452 okid->op_private |= OPpLVAL_INTRO;
1453 break;
1454 }
1455
638eceb6 1456 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1457 if (!cv)
1458 goto restore_2cv;
1459 if (CvLVALUE(cv))
1460 break;
1461 }
1462 }
79072805
LW		 1463 /* FALL THROUGH */
1464 default:
a0d0e21e
LW		 1465 nomod:
1466 /* grep, foreach, subcalls, refgen */
1467 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1468 break;
cea2e8a9 1469 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1470 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1471 ? "do block"
1472 : (o->op_type == OP_ENTERSUB
1473 ? "non-lvalue subroutine call"
1474 : PL_op_desc[o->op_type])),
22c35a8c 1475 type ? PL_op_desc[type] : "local"));
11343788 1476 return o;
79072805 1477
a0d0e21e
LW		 1478 case OP_PREINC:
1479 case OP_PREDEC:
1480 case OP_POW:
1481 case OP_MULTIPLY:
1482 case OP_DIVIDE:
1483 case OP_MODULO:
1484 case OP_REPEAT:
1485 case OP_ADD:
1486 case OP_SUBTRACT:
1487 case OP_CONCAT:
1488 case OP_LEFT_SHIFT:
1489 case OP_RIGHT_SHIFT:
1490 case OP_BIT_AND:
1491 case OP_BIT_XOR:
1492 case OP_BIT_OR:
1493 case OP_I_MULTIPLY:
1494 case OP_I_DIVIDE:
1495 case OP_I_MODULO:
1496 case OP_I_ADD:
1497 case OP_I_SUBTRACT:
11343788 1498 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1499 goto nomod;
3280af22 1500 PL_modcount++;
a0d0e21e
LW		 1501 break;
1502
79072805 1503 case OP_COND_EXPR:
11343788 1504 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1505 mod(kid, type);
79072805
LW		 1506 break;
1507
1508 case OP_RV2AV:
1509 case OP_RV2HV:
93af7a87 1510 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1511 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1512 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1513 PL_modcount = 10000;
11343788 1514 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1515 }
1516 /* FALL THROUGH */
79072805 1517 case OP_RV2GV:
5dc0d613 1518 if (scalar_mod_type(o, type))
3fe9a6f1 1519 goto nomod;
11343788 1520 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1521 /* FALL THROUGH */
1522 case OP_AASSIGN:
1523 case OP_ASLICE:
1524 case OP_HSLICE:
93a17b20
LW		 1525 case OP_NEXTSTATE:
1526 case OP_DBSTATE:
a0d0e21e
LW		 1527 case OP_REFGEN:
1528 case OP_CHOMP:
3280af22 1529 PL_modcount = 10000;
79072805 1530 break;
463ee0b2 1531 case OP_RV2SV:
11343788 1532 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1533 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1534 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1535 /* FALL THROUGH */
79072805 1536 case OP_GV:
463ee0b2 1537 case OP_AV2ARYLEN:
3280af22 1538 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1539 case OP_SASSIGN:
bf4b1e52
GS		 1540 case OP_ANDASSIGN:
1541 case OP_ORASSIGN:
8990e307 1542 case OP_AELEMFAST:
3280af22 1543 PL_modcount++;
8990e307
LW		 1544 break;
1545
748a9306
LW		 1546 case OP_PADAV:
1547 case OP_PADHV:
3280af22 1548 PL_modcount = 10000;
5196be3e
MB		 1549 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1550 return o; /* Treat \(@foo) like ordinary list. */
1551 if (scalar_mod_type(o, type))
3fe9a6f1 1552 goto nomod;
748a9306
LW		 1553 /* FALL THROUGH */
1554 case OP_PADSV:
3280af22 1555 PL_modcount++;
748a9306 1556 if (!type)
cea2e8a9 1557 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1558 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1559 break;
1560
554b3eca 1561#ifdef USE_THREADS
2faa37cc 1562 case OP_THREADSV:
533c011a 1563 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1564 break;
1565#endif /* USE_THREADS */
1566
748a9306
LW		 1567 case OP_PUSHMARK:
1568 break;
a0d0e21e 1569
69969c6f
SB		 1570 case OP_KEYS:
1571 if (type != OP_SASSIGN)
1572 goto nomod;
5d82c453
GA		 1573 goto lvalue_func;
1574 case OP_SUBSTR:
1575 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1576 goto nomod;
5f05dabc 1577 /* FALL THROUGH */
a0d0e21e 1578 case OP_POS:
463ee0b2 1579 case OP_VEC:
5d82c453 1580 lvalue_func:
11343788
MB		 1581 pad_free(o->op_targ);
1582 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1583 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1584 if (o->op_flags & OPf_KIDS)
1585 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1586 break;
a0d0e21e 1587
463ee0b2
LW		 1588 case OP_AELEM:
1589 case OP_HELEM:
11343788 1590 ref(cBINOPo->op_first, o->op_type);
68dc0745 1591 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1592 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1593 o->op_private |= OPpLVAL_DEFER;
3280af22 1594 PL_modcount++;
463ee0b2
LW		 1595 break;
1596
1597 case OP_SCOPE:
1598 case OP_LEAVE:
1599 case OP_ENTER:
11343788
MB		 1600 if (o->op_flags & OPf_KIDS)
1601 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1602 break;
1603
1604 case OP_NULL:
638bc118
GS		 1605 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1606 goto nomod;
1607 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1608 break;
11343788
MB		 1609 if (o->op_targ != OP_LIST) {
1610 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1611 break;
1612 }
1613 /* FALL THROUGH */
463ee0b2 1614 case OP_LIST:
11343788 1615 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1616 mod(kid, type);
1617 break;
1618 }
11343788 1619 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1620
1621 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1622 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1623 else if (!type) {
11343788
MB		 1624 o->op_private |= OPpLVAL_INTRO;
1625 o->op_flags &= ~OPf_SPECIAL;
3280af22 1626 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1627 }
a0d0e21e 1628 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1629 o->op_flags |= OPf_REF;
1630 return o;
463ee0b2
LW		 1631}
1632
864dbfa3 1633STATIC bool
cea2e8a9 1634S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1635{
1636 switch (type) {
1637 case OP_SASSIGN:
5196be3e 1638 if (o->op_type == OP_RV2GV)
3fe9a6f1 1639 return FALSE;
1640 /* FALL THROUGH */
1641 case OP_PREINC:
1642 case OP_PREDEC:
1643 case OP_POSTINC:
1644 case OP_POSTDEC:
1645 case OP_I_PREINC:
1646 case OP_I_PREDEC:
1647 case OP_I_POSTINC:
1648 case OP_I_POSTDEC:
1649 case OP_POW:
1650 case OP_MULTIPLY:
1651 case OP_DIVIDE:
1652 case OP_MODULO:
1653 case OP_REPEAT:
1654 case OP_ADD:
1655 case OP_SUBTRACT:
1656 case OP_I_MULTIPLY:
1657 case OP_I_DIVIDE:
1658 case OP_I_MODULO:
1659 case OP_I_ADD:
1660 case OP_I_SUBTRACT:
1661 case OP_LEFT_SHIFT:
1662 case OP_RIGHT_SHIFT:
1663 case OP_BIT_AND:
1664 case OP_BIT_XOR:
1665 case OP_BIT_OR:
1666 case OP_CONCAT:
1667 case OP_SUBST:
1668 case OP_TRANS:
49e9fbe6
GS		 1669 case OP_READ:
1670 case OP_SYSREAD:
1671 case OP_RECV:
bf4b1e52
GS		 1672 case OP_ANDASSIGN:
1673 case OP_ORASSIGN:
3fe9a6f1 1674 return TRUE;
1675 default:
1676 return FALSE;
1677 }
1678}
1679
35cd451c 1680STATIC bool
cea2e8a9 1681S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1682{
1683 switch (o->op_type) {
1684 case OP_PIPE_OP:
1685 case OP_SOCKPAIR:
1686 if (argnum == 2)
1687 return TRUE;
1688 /* FALL THROUGH */
1689 case OP_SYSOPEN:
1690 case OP_OPEN:
ded8aa31 1691 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1692 case OP_SOCKET:
1693 case OP_OPEN_DIR:
1694 case OP_ACCEPT:
1695 if (argnum == 1)
1696 return TRUE;
1697 /* FALL THROUGH */
1698 default:
1699 return FALSE;
1700 }
1701}
1702
463ee0b2 1703OP *
864dbfa3 1704Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1705{
1706 OP *kid;
11343788
MB		 1707 if (o && o->op_flags & OPf_KIDS) {
1708 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1709 ref(kid, type);
1710 }
11343788 1711 return o;
463ee0b2
LW		 1712}
1713
1714OP *
864dbfa3 1715Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1716{
1717 OP *kid;
463ee0b2 1718
3280af22 1719 if (!o || PL_error_count)
11343788 1720 return o;
463ee0b2 1721
11343788 1722 switch (o->op_type) {
a0d0e21e 1723 case OP_ENTERSUB:
afebc493 1724 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1725 !(o->op_flags & OPf_STACKED)) {
1726 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1727 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1728 assert(cUNOPo->op_first->op_type == OP_NULL);
1729 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1730 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1731 }
1732 break;
aeea060c 1733
463ee0b2 1734 case OP_COND_EXPR:
11343788 1735 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1736 ref(kid, type);
1737 break;
8990e307 1738 case OP_RV2SV:
35cd451c
GS		 1739 if (type == OP_DEFINED)
1740 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1741 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1742 /* FALL THROUGH */
1743 case OP_PADSV:
5f05dabc 1744 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1745 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1746 : type == OP_RV2HV ? OPpDEREF_HV
1747 : OPpDEREF_SV);
11343788 1748 o->op_flags |= OPf_MOD;
a0d0e21e 1749 }
8990e307
LW		 1750 break;
1751
2faa37cc 1752 case OP_THREADSV:
a863c7d1
MB		 1753 o->op_flags |= OPf_MOD; /* XXX ??? */
1754 break;
1755
463ee0b2
LW		 1756 case OP_RV2AV:
1757 case OP_RV2HV:
aeea060c 1758 o->op_flags |= OPf_REF;
8990e307 1759 /* FALL THROUGH */
463ee0b2 1760 case OP_RV2GV:
35cd451c
GS		 1761 if (type == OP_DEFINED)
1762 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1763 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1764 break;
8990e307 1765
463ee0b2
LW		 1766 case OP_PADAV:
1767 case OP_PADHV:
aeea060c 1768 o->op_flags |= OPf_REF;
79072805 1769 break;
aeea060c 1770
8990e307 1771 case OP_SCALAR:
79072805 1772 case OP_NULL:
11343788 1773 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1774 break;
11343788 1775 ref(cBINOPo->op_first, type);
79072805
LW		 1776 break;
1777 case OP_AELEM:
1778 case OP_HELEM:
11343788 1779 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1780 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1781 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1782 : type == OP_RV2HV ? OPpDEREF_HV
1783 : OPpDEREF_SV);
11343788 1784 o->op_flags |= OPf_MOD;
8990e307 1785 }
79072805
LW		 1786 break;
1787
463ee0b2 1788 case OP_SCOPE:
79072805
LW		 1789 case OP_LEAVE:
1790 case OP_ENTER:
8990e307 1791 case OP_LIST:
11343788 1792 if (!(o->op_flags & OPf_KIDS))
79072805 1793 break;
11343788 1794 ref(cLISTOPo->op_last, type);
79072805 1795 break;
a0d0e21e
LW		 1796 default:
1797 break;
79072805 1798 }
11343788 1799 return scalar(o);
8990e307 1800
79072805
LW		 1801}
1802
09bef843
SB		 1803STATIC OP *
1804S_dup_attrlist(pTHX_ OP *o)
1805{
1806 OP *rop = Nullop;
1807
1808 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1809 * where the first kid is OP_PUSHMARK and the remaining ones
1810 * are OP_CONST. We need to push the OP_CONST values.
1811 */
1812 if (o->op_type == OP_CONST)
1813 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1814 else {
1815 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1816 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1817 if (o->op_type == OP_CONST)
1818 rop = append_elem(OP_LIST, rop,
1819 newSVOP(OP_CONST, o->op_flags,
1820 SvREFCNT_inc(cSVOPo->op_sv)));
1821 }
1822 }
1823 return rop;
1824}
1825
1826STATIC void
1827S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1828{
09bef843
SB		 1829 SV *stashsv;
1830
1831 /* fake up C<use attributes $pkg,$rv,@attrs> */
1832 ENTER; /* need to protect against side-effects of 'use' */
1833 SAVEINT(PL_expect);
1834 if (stash && HvNAME(stash))
1835 stashsv = newSVpv(HvNAME(stash), 0);
1836 else
1837 stashsv = &PL_sv_no;
e4783991 1838
09bef843 1839#define ATTRSMODULE "attributes"
e4783991
GS		 1840
1841 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1842 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1843 Nullsv,
1844 prepend_elem(OP_LIST,
1845 newSVOP(OP_CONST, 0, stashsv),
1846 prepend_elem(OP_LIST,
1847 newSVOP(OP_CONST, 0,
1848 newRV(target)),
1849 dup_attrlist(attrs))));
09bef843
SB		 1850 LEAVE;
1851}
1852
1853STATIC OP *
1854S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1855{
1856 OP *kid;
93a17b20
LW		 1857 I32 type;
1858
3280af22 1859 if (!o || PL_error_count)
11343788 1860 return o;
93a17b20 1861
11343788 1862 type = o->op_type;
93a17b20 1863 if (type == OP_LIST) {
11343788 1864 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1865 my_kid(kid, attrs);
dab48698 1866 } else if (type == OP_UNDEF) {
7766148a 1867 return o;
77ca0c92
LW		 1868 } else if (type == OP_RV2SV || /* "our" declaration */
1869 type == OP_RV2AV ||
1870 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1871 o->op_private |= OPpOUR_INTRO;
77ca0c92 1872 return o;
dab48698 1873 } else if (type != OP_PADSV &&
93a17b20
LW		 1874 type != OP_PADAV &&
1875 type != OP_PADHV &&
1876 type != OP_PUSHMARK)
1877 {
eb64745e
GS		 1878 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1879 PL_op_desc[o->op_type],
1880 PL_in_my == KEY_our ? "our" : "my"));
11343788 1881 return o;
93a17b20 1882 }
09bef843
SB		 1883 else if (attrs && type != OP_PUSHMARK) {
1884 HV *stash;
1885 SV *padsv;
1886 SV **namesvp;
1887
eb64745e
GS		 1888 PL_in_my = FALSE;
1889 PL_in_my_stash = Nullhv;
1890
09bef843
SB		 1891 /* check for C<my Dog $spot> when deciding package */
1892 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1893 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1894 stash = SvSTASH(*namesvp);
1895 else
1896 stash = PL_curstash;
1897 padsv = PAD_SV(o->op_targ);
1898 apply_attrs(stash, padsv, attrs);
1899 }
11343788
MB		 1900 o->op_flags |= OPf_MOD;
1901 o->op_private |= OPpLVAL_INTRO;
1902 return o;
93a17b20
LW		 1903}
1904
1905OP *
09bef843
SB		 1906Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1907{
1908 if (o->op_flags & OPf_PARENS)
1909 list(o);
09bef843
SB		 1910 if (attrs)
1911 SAVEFREEOP(attrs);
eb64745e
GS		 1912 o = my_kid(o, attrs);
1913 PL_in_my = FALSE;
1914 PL_in_my_stash = Nullhv;
1915 return o;
09bef843
SB		 1916}
1917
1918OP *
1919Perl_my(pTHX_ OP *o)
1920{
1921 return my_kid(o, Nullop);
1922}
1923
1924OP *
864dbfa3 1925Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1926{
1927 if (o)
1928 o->op_flags |= OPf_PARENS;
1929 return o;
1930}
1931
1932OP *
864dbfa3 1933Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1934{
d008e5eb 1935 dTHR;
11343788 1936 OP *o;
79072805 1937
e476b1b5 1938 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1939 (left->op_type == OP_RV2AV ||
1940 left->op_type == OP_RV2HV ||
1941 left->op_type == OP_PADAV ||
1942 left->op_type == OP_PADHV)) {
22c35a8c 1943 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1944 right->op_type == OP_TRANS)
1945 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1946 const char *sample = ((left->op_type == OP_RV2AV ||
1947 left->op_type == OP_PADAV)
1948 ? "@array" : "%hash");
e476b1b5 1949 Perl_warner(aTHX_ WARN_MISC,
599cee73
PM		 1950 "Applying %s to %s will act on scalar(%s)",
1951 desc, sample, sample);
2ae324a7 1952 }
1953
79072805
LW		 1954 if (right->op_type == OP_MATCH ||
1955 right->op_type == OP_SUBST ||
1956 right->op_type == OP_TRANS) {
1957 right->op_flags |= OPf_STACKED;
1958 if (right->op_type != OP_MATCH)
463ee0b2 1959 left = mod(left, right->op_type);
79072805 1960 if (right->op_type == OP_TRANS)
11343788 1961 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1962 else
11343788 1963 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1964 if (type == OP_NOT)
11343788
MB		 1965 return newUNOP(OP_NOT, 0, scalar(o));
1966 return o;
79072805
LW		 1967 }
1968 else
1969 return bind_match(type, left,
1970 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1971}
1972
1973OP *
864dbfa3 1974Perl_invert(pTHX_ OP *o)
79072805 1975{
11343788
MB		 1976 if (!o)
1977 return o;
79072805 1978 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1979 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1980}
1981
1982OP *
864dbfa3 1983Perl_scope(pTHX_ OP *o)
79072805
LW		 1984{
1985 if (o) {
3280af22 1986 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1987 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1988 o->op_type = OP_LEAVE;
22c35a8c 1989 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1990 }
1991 else {
1992 if (o->op_type == OP_LINESEQ) {
1993 OP *kid;
1994 o->op_type = OP_SCOPE;
22c35a8c 1995 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1996 kid = ((LISTOP*)o)->op_first;
1997 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1998 null(kid);
463ee0b2
LW		 1999 }
2000 else
748a9306 2001 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2002 }
79072805
LW		 2003 }
2004 return o;
2005}
2006
b3ac6de7 2007void
864dbfa3 2008Perl_save_hints(pTHX)
b3ac6de7 2009{
3280af22
NIS		 2010 SAVEI32(PL_hints);
2011 SAVESPTR(GvHV(PL_hintgv));
2012 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2013 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2014}
2015
a0d0e21e 2016int
864dbfa3 2017Perl_block_start(pTHX_ int full)
79072805 2018{
11343788 2019 dTHR;
3280af22 2020 int retval = PL_savestack_ix;
b3ac6de7 2021
3280af22 2022 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2023 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2024 if (full)
2025 PL_comppad_name_fill = PL_comppad_name_floor;
2026 if (PL_comppad_name_floor < 0)
2027 PL_comppad_name_floor = 0;
3280af22
NIS		 2028 SAVEI32(PL_min_intro_pending);
2029 SAVEI32(PL_max_intro_pending);
2030 PL_min_intro_pending = 0;
2031 SAVEI32(PL_comppad_name_fill);
2032 SAVEI32(PL_padix_floor);
2033 PL_padix_floor = PL_padix;
2034 PL_pad_reset_pending = FALSE;
b3ac6de7 2035 SAVEHINTS();
3280af22 2036 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2037 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2038 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2039 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2040 SAVEFREESV(PL_compiling.cop_warnings) ;
2041 }
a0d0e21e
LW		 2042 return retval;
2043}
2044
2045OP*
864dbfa3 2046Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2047{
11343788 2048 dTHR;
3280af22 2049 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2050 OP* retval = scalarseq(seq);
a0d0e21e 2051 LEAVE_SCOPE(floor);
3280af22 2052 PL_pad_reset_pending = FALSE;
e24b16f9 2053 PL_compiling.op_private = PL_hints;
a0d0e21e 2054 if (needblockscope)
3280af22
NIS		 2055 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2056 pad_leavemy(PL_comppad_name_fill);
2057 PL_cop_seqmax++;
a0d0e21e
LW		 2058 return retval;
2059}
2060
76e3520e 2061STATIC OP *
cea2e8a9 2062S_newDEFSVOP(pTHX)
54b9620d
MB		 2063{
2064#ifdef USE_THREADS
2065 OP *o = newOP(OP_THREADSV, 0);
2066 o->op_targ = find_threadsv("_");
2067 return o;
2068#else
3280af22 2069 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2070#endif /* USE_THREADS */
2071}
2072
a0d0e21e 2073void
864dbfa3 2074Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2075{
11343788 2076 dTHR;
3280af22 2077 if (PL_in_eval) {
b295d113
TH		 2078 if (PL_eval_root)
2079 return;
faef0170
HS		 2080 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2081 ((PL_in_eval & EVAL_KEEPERR)
2082 ? OPf_SPECIAL : 0), o);
3280af22 2083 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2084 PL_eval_root->op_private |= OPpREFCOUNTED;
2085 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2086 PL_eval_root->op_next = 0;
2087 peep(PL_eval_start);
a0d0e21e
LW		 2088 }
2089 else {
5dc0d613 2090 if (!o)
a0d0e21e 2091 return;
3280af22
NIS		 2092 PL_main_root = scope(sawparens(scalarvoid(o)));
2093 PL_curcop = &PL_compiling;
2094 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2095 PL_main_root->op_private |= OPpREFCOUNTED;
2096 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2097 PL_main_root->op_next = 0;
2098 peep(PL_main_start);
2099 PL_compcv = 0;
3841441e 2100
4fdae800 2101 /* Register with debugger */
84902520 2102 if (PERLDB_INTER) {
864dbfa3 2103 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2104 if (cv) {
2105 dSP;
924508f0 2106 PUSHMARK(SP);
cc49e20b 2107 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2108 PUTBACK;
864dbfa3 2109 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2110 }
2111 }
79072805 2112 }
79072805
LW		 2113}
2114
2115OP *
864dbfa3 2116Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2117{
2118 if (o->op_flags & OPf_PARENS)
2119 list(o);
8990e307 2120 else {
d008e5eb 2121 dTHR;
599cee73 2122 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2123 char *s;
834a4ddd 2124 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2125 if (*s == ';' || *s == '=')
eb64745e
GS		 2126 Perl_warner(aTHX_ WARN_PARENTHESIS,
2127 "Parentheses missing around \"%s\" list",
2128 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2129 }
2130 }
93a17b20 2131 if (lex)
eb64745e 2132 o = my(o);
93a17b20 2133 else
eb64745e
GS		 2134 o = mod(o, OP_NULL); /* a bit kludgey */
2135 PL_in_my = FALSE;
2136 PL_in_my_stash = Nullhv;
2137 return o;
79072805
LW		 2138}
2139
2140OP *
864dbfa3 2141Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2142{
2143 if (o->op_type == OP_LIST) {
554b3eca
MB		 2144 OP *o2;
2145#ifdef USE_THREADS
2faa37cc 2146 o2 = newOP(OP_THREADSV, 0);
54b9620d 2147 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2148#else
2149 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2150#endif /* USE_THREADS */
2151 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2152 }
2153 return o;
2154}
2155
2156OP *
864dbfa3 2157Perl_fold_constants(pTHX_ register OP *o)
79072805 2158{
11343788 2159 dTHR;
79072805
LW		 2160 register OP *curop;
2161 I32 type = o->op_type;
748a9306 2162 SV *sv;
79072805 2163
22c35a8c 2164 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2165 scalar(o);
b162f9ea 2166 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2167 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2168
eac055e9
GS		 2169 /* integerize op, unless it happens to be C<-foo>.
2170 * XXX should pp_i_negate() do magic string negation instead? */
2171 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2172 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2173 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2174 {
22c35a8c 2175 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2176 }
85e6fe83 2177
22c35a8c 2178 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2179 goto nope;
2180
de939608 2181 switch (type) {
7a52d87a
GS		 2182 case OP_NEGATE:
2183 /* XXX might want a ck_negate() for this */
2184 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2185 break;
de939608
CS		 2186 case OP_SPRINTF:
2187 case OP_UCFIRST:
2188 case OP_LCFIRST:
2189 case OP_UC:
2190 case OP_LC:
69dcf70c
MB		 2191 case OP_SLT:
2192 case OP_SGT:
2193 case OP_SLE:
2194 case OP_SGE:
2195 case OP_SCMP:
2196
de939608
CS		 2197 if (o->op_private & OPpLOCALE)
2198 goto nope;
2199 }
2200
3280af22 2201 if (PL_error_count)
a0d0e21e
LW		 2202 goto nope; /* Don't try to run w/ errors */
2203
79072805 2204 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2205 if ((curop->op_type != OP_CONST ||
2206 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2207 curop->op_type != OP_LIST &&
2208 curop->op_type != OP_SCALAR &&
2209 curop->op_type != OP_NULL &&
2210 curop->op_type != OP_PUSHMARK)
2211 {
79072805
LW		 2212 goto nope;
2213 }
2214 }
2215
2216 curop = LINKLIST(o);
2217 o->op_next = 0;
533c011a 2218 PL_op = curop;
cea2e8a9 2219 CALLRUNOPS(aTHX);
3280af22 2220 sv = *(PL_stack_sp--);
748a9306 2221 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2222 pad_swipe(o->op_targ);
748a9306
LW		 2223 else if (SvTEMP(sv)) { /* grab mortal temp? */
2224 (void)SvREFCNT_inc(sv);
2225 SvTEMP_off(sv);
85e6fe83 2226 }
79072805
LW		 2227 op_free(o);
2228 if (type == OP_RV2GV)
b1cb66bf 2229 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2230 else {
ee580363
GS		 2231 /* try to smush double to int, but don't smush -2.0 to -2 */
2232 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2233 type != OP_NEGATE)
2234 {
748a9306 2235 IV iv = SvIV(sv);
65202027 2236 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2237 SvREFCNT_dec(sv);
2238 sv = newSViv(iv);
2239 }
b1cb66bf 2240 else
2241 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2242 }
2243 return newSVOP(OP_CONST, 0, sv);
2244 }
aeea060c 2245
79072805 2246 nope:
22c35a8c 2247 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2248 return o;
79072805 2249
3280af22 2250 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2251 if (type == OP_MODULO
2252 || type == OP_DIVIDE
2253 || !(o->op_flags & OPf_KIDS))
2254 {
85e6fe83 2255 return o;
4bb9f687 2256 }
85e6fe83
LW		 2257
2258 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2259 if (curop->op_type == OP_CONST) {
b1cb66bf 2260 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2261 continue;
2262 return o;
2263 }
22c35a8c 2264 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2265 continue;
2266 return o;
2267 }
22c35a8c 2268 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2269 }
2270
79072805
LW		 2271 return o;
2272}
2273
2274OP *
864dbfa3 2275Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2276{
11343788 2277 dTHR;
79072805 2278 register OP *curop;
3280af22 2279 I32 oldtmps_floor = PL_tmps_floor;
79072805 2280
a0d0e21e 2281 list(o);
3280af22 2282 if (PL_error_count)
a0d0e21e
LW		 2283 return o; /* Don't attempt to run with errors */
2284
533c011a 2285 PL_op = curop = LINKLIST(o);
a0d0e21e 2286 o->op_next = 0;
7d4045d4 2287 peep(curop);
cea2e8a9
GS		 2288 pp_pushmark();
2289 CALLRUNOPS(aTHX);
533c011a 2290 PL_op = curop;
cea2e8a9 2291 pp_anonlist();
3280af22 2292 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2293
2294 o->op_type = OP_RV2AV;
22c35a8c 2295 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2296 curop = ((UNOP*)o)->op_first;
3280af22 2297 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2298 op_free(curop);
79072805
LW		 2299 linklist(o);
2300 return list(o);
2301}
2302
2303OP *
864dbfa3 2304Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2305{
2306 OP *kid;
a0d0e21e 2307 OP *last = 0;
79072805 2308
11343788
MB		 2309 if (!o || o->op_type != OP_LIST)
2310 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2311 else
5dc0d613 2312 o->op_flags &= ~OPf_WANT;
79072805 2313
22c35a8c 2314 if (!(PL_opargs[type] & OA_MARK))
11343788 2315 null(cLISTOPo->op_first);
8990e307 2316
11343788 2317 o->op_type = type;
22c35a8c 2318 o->op_ppaddr = PL_ppaddr[type];
11343788 2319 o->op_flags |= flags;
79072805 2320
11343788
MB		 2321 o = CHECKOP(type, o);
2322 if (o->op_type != type)
2323 return o;
79072805 2324
11343788 2325 if (cLISTOPo->op_children < 7) {
79072805 2326 /* XXX do we really need to do this if we're done appending?? */
11343788 2327 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2328 last = kid;
11343788 2329 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2330 }
2331
11343788 2332 return fold_constants(o);
79072805
LW		 2333}
2334
2335/* List constructors */
2336
2337OP *
864dbfa3 2338Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2339{
2340 if (!first)
2341 return last;
8990e307
LW		 2342
2343 if (!last)
79072805 2344 return first;
8990e307 2345
155aba94
GS		 2346 if (first->op_type != type
2347 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2348 {
2349 return newLISTOP(type, 0, first, last);
2350 }
79072805 2351
a0d0e21e
LW		 2352 if (first->op_flags & OPf_KIDS)
2353 ((LISTOP*)first)->op_last->op_sibling = last;
2354 else {
2355 first->op_flags |= OPf_KIDS;
2356 ((LISTOP*)first)->op_first = last;
2357 }
2358 ((LISTOP*)first)->op_last = last;
2359 ((LISTOP*)first)->op_children++;
2360 return first;
79072805
LW		 2361}
2362
2363OP *
864dbfa3 2364Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2365{
2366 if (!first)
2367 return (OP*)last;
8990e307
LW		 2368
2369 if (!last)
79072805 2370 return (OP*)first;
8990e307
LW		 2371
2372 if (first->op_type != type)
79072805 2373 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2374
2375 if (last->op_type != type)
79072805
LW		 2376 return append_elem(type, (OP*)first, (OP*)last);
2377
2378 first->op_last->op_sibling = last->op_first;
2379 first->op_last = last->op_last;
2380 first->op_children += last->op_children;
2381 if (first->op_children)
acb74605 2382 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2383
2384#ifdef PL_OP_SLAB_ALLOC
2385#else
2386 Safefree(last);
2387#endif
79072805
LW		 2388 return (OP*)first;
2389}
2390
2391OP *
864dbfa3 2392Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2393{
2394 if (!first)
2395 return last;
8990e307
LW		 2396
2397 if (!last)
79072805 2398 return first;
8990e307
LW		 2399
2400 if (last->op_type == type) {
2401 if (type == OP_LIST) { /* already a PUSHMARK there */
2402 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2403 ((LISTOP*)last)->op_first->op_sibling = first;
2404 }
2405 else {
2406 if (!(last->op_flags & OPf_KIDS)) {
2407 ((LISTOP*)last)->op_last = first;
2408 last->op_flags |= OPf_KIDS;
2409 }
2410 first->op_sibling = ((LISTOP*)last)->op_first;
2411 ((LISTOP*)last)->op_first = first;
79072805 2412 }
79072805
LW		 2413 ((LISTOP*)last)->op_children++;
2414 return last;
2415 }
2416
2417 return newLISTOP(type, 0, first, last);
2418}
2419
2420/* Constructors */
2421
2422OP *
864dbfa3 2423Perl_newNULLLIST(pTHX)
79072805 2424{
8990e307
LW		 2425 return newOP(OP_STUB, 0);
2426}
2427
2428OP *
864dbfa3 2429Perl_force_list(pTHX_ OP *o)
8990e307 2430{
11343788
MB		 2431 if (!o || o->op_type != OP_LIST)
2432 o = newLISTOP(OP_LIST, 0, o, Nullop);
2433 null(o);
2434 return o;
79072805
LW		 2435}
2436
2437OP *
864dbfa3 2438Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2439{
2440 LISTOP *listop;
2441
b7dc083c 2442 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2443
2444 listop->op_type = type;
22c35a8c 2445 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2446 listop->op_children = (first != 0) + (last != 0);
2447 listop->op_flags = flags;
79072805
LW		 2448
2449 if (!last && first)
2450 last = first;
2451 else if (!first && last)
2452 first = last;
8990e307
LW		 2453 else if (first)
2454 first->op_sibling = last;
79072805
LW		 2455 listop->op_first = first;
2456 listop->op_last = last;
8990e307
LW		 2457 if (type == OP_LIST) {
2458 OP* pushop;
2459 pushop = newOP(OP_PUSHMARK, 0);
2460 pushop->op_sibling = first;
2461 listop->op_first = pushop;
2462 listop->op_flags |= OPf_KIDS;
2463 if (!last)
2464 listop->op_last = pushop;
2465 }
2466 else if (listop->op_children)
2467 listop->op_flags |= OPf_KIDS;
79072805
LW		 2468
2469 return (OP*)listop;
2470}
2471
2472OP *
864dbfa3 2473Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2474{
11343788 2475 OP *o;
b7dc083c 2476 NewOp(1101, o, 1, OP);
11343788 2477 o->op_type = type;
22c35a8c 2478 o->op_ppaddr = PL_ppaddr[type];
11343788 2479 o->op_flags = flags;
79072805 2480
11343788
MB		 2481 o->op_next = o;
2482 o->op_private = 0 + (flags >> 8);
22c35a8c 2483 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2484 scalar(o);
22c35a8c 2485 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2486 o->op_targ = pad_alloc(type, SVs_PADTMP);
2487 return CHECKOP(type, o);
79072805
LW		 2488}
2489
2490OP *
864dbfa3 2491Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2492{
2493 UNOP *unop;
2494
93a17b20 2495 if (!first)
aeea060c 2496 first = newOP(OP_STUB, 0);
22c35a8c 2497 if (PL_opargs[type] & OA_MARK)
8990e307 2498 first = force_list(first);
93a17b20 2499
b7dc083c 2500 NewOp(1101, unop, 1, UNOP);
79072805 2501 unop->op_type = type;
22c35a8c 2502 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2503 unop->op_first = first;
2504 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2505 unop->op_private = 1 | (flags >> 8);
e50aee73 2506 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2507 if (unop->op_next)
2508 return (OP*)unop;
2509
a0d0e21e 2510 return fold_constants((OP *) unop);
79072805
LW		 2511}
2512
2513OP *
864dbfa3 2514Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2515{
2516 BINOP *binop;
b7dc083c 2517 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2518
2519 if (!first)
2520 first = newOP(OP_NULL, 0);
2521
2522 binop->op_type = type;
22c35a8c 2523 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2524 binop->op_first = first;
2525 binop->op_flags = flags | OPf_KIDS;
2526 if (!last) {
2527 last = first;
c07a80fd 2528 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2529 }
2530 else {
c07a80fd 2531 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2532 first->op_sibling = last;
2533 }
2534
e50aee73 2535 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2536 if (binop->op_next || binop->op_type != type)
79072805
LW		 2537 return (OP*)binop;
2538
7284ab6f 2539 binop->op_last = binop->op_first->op_sibling;
79072805 2540
a0d0e21e 2541 return fold_constants((OP *)binop);
79072805
LW		 2542}
2543
a0ed51b3
LW		 2544static int
2545utf8compare(const void *a, const void *b)
2546{
2547 int i;
2548 for (i = 0; i < 10; i++) {
2549 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2550 return -1;
2551 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2552 return 1;
2553 }
2554 return 0;
2555}
2556
79072805 2557OP *
864dbfa3 2558Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2559{
79072805
LW		 2560 SV *tstr = ((SVOP*)expr)->op_sv;
2561 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2562 STRLEN tlen;
2563 STRLEN rlen;
ec49126f 2564 register U8 *t = (U8*)SvPV(tstr, tlen);
2565 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2566 register I32 i;
2567 register I32 j;
a0ed51b3 2568 I32 del;
79072805 2569 I32 complement;
5d06d08e 2570 I32 squash;
79072805
LW		 2571 register short *tbl;
2572
11343788 2573 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2574 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2575 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2576
a0ed51b3 2577 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2578 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2579 SV* transv = 0;
2580 U8* tend = t + tlen;
2581 U8* rend = r + rlen;
2582 I32 ulen;
2583 U32 tfirst = 1;
2584 U32 tlast = 0;
2585 I32 tdiff;
2586 U32 rfirst = 1;
2587 U32 rlast = 0;
2588 I32 rdiff;
2589 I32 diff;
2590 I32 none = 0;
2591 U32 max = 0;
2592 I32 bits;
2593 I32 grows = 0;
2594 I32 havefinal = 0;
2595 U32 final;
a0ed51b3
LW		 2596 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2597 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2598
2599 if (complement) {
806e7201 2600 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3
LW		 2601 U8** cp;
2602 UV nextmin = 0;
2603 New(1109, cp, tlen, U8*);
2604 i = 0;
79cb57f6 2605 transv = newSVpvn("",0);
a0ed51b3
LW		 2606 while (t < tend) {
2607 cp[i++] = t;
2608 t += UTF8SKIP(t);
2609 if (*t == 0xff) {
2610 t++;
2611 t += UTF8SKIP(t);
2612 }
2613 }
2614 qsort(cp, i, sizeof(U8*), utf8compare);
2615 for (j = 0; j < i; j++) {
2616 U8 *s = cp[j];
2617 UV val = utf8_to_uv(s, &ulen);
2618 s += ulen;
2619 diff = val - nextmin;
2620 if (diff > 0) {
2621 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2622 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2623 if (diff > 1) {
2624 t = uv_to_utf8(tmpbuf, val - 1);
2625 sv_catpvn(transv, "\377", 1);
dfe13c55 2626 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2627 }
2628 }
2629 if (*s == 0xff)
2630 val = utf8_to_uv(s+1, &ulen);
2631 if (val >= nextmin)
2632 nextmin = val + 1;
2633 }
2634 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2635 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2636 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2637 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2638 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2639 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2640 tlen = SvCUR(transv);
2641 tend = t + tlen;
2642 }
2643 else if (!rlen && !del) {
2644 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2645 }
2646 if (!squash) {
2647 if (to_utf && from_utf) { /* only counting characters */
2648 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2649 o->op_private |= OPpTRANS_IDENTICAL;
2650 }
2651 else { /* straight latin-1 translation */
2652 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2653 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2654 o->op_private |= OPpTRANS_IDENTICAL;
2655 }
a0ed51b3
LW		 2656 }
2657
2658 while (t < tend || tfirst <= tlast) {
2659 /* see if we need more "t" chars */
2660 if (tfirst > tlast) {
2661 tfirst = (I32)utf8_to_uv(t, &ulen);
2662 t += ulen;
2663 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2664 tlast = (I32)utf8_to_uv(++t, &ulen);
2665 t += ulen;
2666 }
2667 else
2668 tlast = tfirst;
2669 }
2670
2671 /* now see if we need more "r" chars */
2672 if (rfirst > rlast) {
2673 if (r < rend) {
2674 rfirst = (I32)utf8_to_uv(r, &ulen);
2675 r += ulen;
2676 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2677 rlast = (I32)utf8_to_uv(++r, &ulen);
2678 r += ulen;
2679 }
2680 else
2681 rlast = rfirst;
2682 }
2683 else {
2684 if (!havefinal++)
2685 final = rlast;
2686 rfirst = rlast = 0xffffffff;
2687 }
2688 }
2689
2690 /* now see which range will peter our first, if either. */
2691 tdiff = tlast - tfirst;
2692 rdiff = rlast - rfirst;
2693
2694 if (tdiff <= rdiff)
2695 diff = tdiff;
2696 else
2697 diff = rdiff;
2698
2699 if (rfirst == 0xffffffff) {
2700 diff = tdiff; /* oops, pretend rdiff is infinite */
2701 if (diff > 0)
894356b3
GS		 2702 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2703 (long)tfirst, (long)tlast);
a0ed51b3 2704 else
894356b3 2705 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2706 }
2707 else {
2708 if (diff > 0)
894356b3
GS		 2709 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2710 (long)tfirst, (long)(tfirst + diff),
2711 (long)rfirst);
a0ed51b3 2712 else
894356b3
GS		 2713 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2714 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2715
2716 if (rfirst + diff > max)
2717 max = rfirst + diff;
2718 rfirst += diff + 1;
2719 if (!grows) {
2720 if (rfirst <= 0x80)
2721 ;
2722 else if (rfirst <= 0x800)
2723 grows |= (tfirst < 0x80);
2724 else if (rfirst <= 0x10000)
2725 grows |= (tfirst < 0x800);
2726 else if (rfirst <= 0x200000)
2727 grows |= (tfirst < 0x10000);
2728 else if (rfirst <= 0x4000000)
2729 grows |= (tfirst < 0x200000);
2730 else if (rfirst <= 0x80000000)
2731 grows |= (tfirst < 0x4000000);
2732 }
2733 }
2734 tfirst += diff + 1;
2735 }
2736
2737 none = ++max;
2738 if (del)
2739 del = ++max;
2740
2741 if (max > 0xffff)
2742 bits = 32;
2743 else if (max > 0xff)
2744 bits = 16;
2745 else
2746 bits = 8;
2747
2748 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2749 SvREFCNT_dec(listsv);
2750 if (transv)
2751 SvREFCNT_dec(transv);
2752
2753 if (!del && havefinal)
b448e4fe
JH		 2754 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2755 newSVuv((UV)final), 0);
a0ed51b3
LW		 2756
2757 if (grows && to_utf)
2758 o->op_private |= OPpTRANS_GROWS;
2759
2760 op_free(expr);
2761 op_free(repl);
2762 return o;
2763 }
2764
2765 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2766 if (complement) {
2767 Zero(tbl, 256, short);
2768 for (i = 0; i < tlen; i++)
ec49126f 2769 tbl[t[i]] = -1;
79072805
LW		 2770 for (i = 0, j = 0; i < 256; i++) {
2771 if (!tbl[i]) {
2772 if (j >= rlen) {
a0ed51b3 2773 if (del)
79072805
LW		 2774 tbl[i] = -2;
2775 else if (rlen)
ec49126f 2776 tbl[i] = r[j-1];
79072805
LW		 2777 else
2778 tbl[i] = i;
2779 }
2780 else
ec49126f 2781 tbl[i] = r[j++];
79072805
LW		 2782 }
2783 }
2784 }
2785 else {
a0ed51b3 2786 if (!rlen && !del) {
79072805 2787 r = t; rlen = tlen;
5d06d08e 2788 if (!squash)
4757a243 2789 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2790 }
2791 for (i = 0; i < 256; i++)
2792 tbl[i] = -1;
2793 for (i = 0, j = 0; i < tlen; i++,j++) {
2794 if (j >= rlen) {
a0ed51b3 2795 if (del) {
ec49126f 2796 if (tbl[t[i]] == -1)
2797 tbl[t[i]] = -2;
79072805
LW		 2798 continue;
2799 }
2800 --j;
2801 }
ec49126f 2802 if (tbl[t[i]] == -1)
2803 tbl[t[i]] = r[j];
79072805
LW		 2804 }
2805 }
2806 op_free(expr);
2807 op_free(repl);
2808
11343788 2809 return o;
79072805
LW		 2810}
2811
2812OP *
864dbfa3 2813Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2814{
11343788 2815 dTHR;
79072805
LW		 2816 PMOP *pmop;
2817
b7dc083c 2818 NewOp(1101, pmop, 1, PMOP);
79072805 2819 pmop->op_type = type;
22c35a8c 2820 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2821 pmop->op_flags = flags;
c07a80fd 2822 pmop->op_private = 0 | (flags >> 8);
79072805 2823
3280af22 2824 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2825 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2826 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2827 pmop->op_pmpermflags |= PMf_LOCALE;
2828 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2829
79072805 2830 /* link into pm list */
3280af22
NIS		 2831 if (type != OP_TRANS && PL_curstash) {
2832 pmop->op_pmnext = HvPMROOT(PL_curstash);
2833 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2834 }
2835
2836 return (OP*)pmop;
2837}
2838
2839OP *
864dbfa3 2840Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2841{
5c0ca799 2842 dTHR;
79072805
LW		 2843 PMOP *pm;
2844 LOGOP *rcop;
ce862d02 2845 I32 repl_has_vars = 0;
79072805 2846
11343788
MB		 2847 if (o->op_type == OP_TRANS)
2848 return pmtrans(o, expr, repl);
79072805 2849
3280af22 2850 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2851 pm = (PMOP*)o;
79072805
LW		 2852
2853 if (expr->op_type == OP_CONST) {
463ee0b2 2854 STRLEN plen;
79072805 2855 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2856 char *p = SvPV(pat, plen);
11343788 2857 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2858 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2859 p = SvPV(pat, plen);
79072805
LW		 2860 pm->op_pmflags |= PMf_SKIPWHITE;
2861 }
393fec97 2862 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2863 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2864 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2865 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2866 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2867 op_free(expr);
2868 }
2869 else {
393fec97
GS		 2870 if (PL_hints & HINT_UTF8)
2871 pm->op_pmdynflags |= PMdf_UTF8;
3280af22
NIS		 2872 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2873 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2874 ? OP_REGCRESET
2875 : OP_REGCMAYBE),0,expr);
463ee0b2 2876
b7dc083c 2877 NewOp(1101, rcop, 1, LOGOP);
79072805 2878 rcop->op_type = OP_REGCOMP;
22c35a8c 2879 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2880 rcop->op_first = scalar(expr);
3280af22 2881 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2882 ? (OPf_SPECIAL | OPf_KIDS)
2883 : OPf_KIDS);
79072805 2884 rcop->op_private = 1;
11343788 2885 rcop->op_other = o;
79072805
LW		 2886
2887 /* establish postfix order */
3280af22 2888 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2889 LINKLIST(expr);
2890 rcop->op_next = expr;
2891 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2892 }
2893 else {
2894 rcop->op_next = LINKLIST(expr);
2895 expr->op_next = (OP*)rcop;
2896 }
79072805 2897
11343788 2898 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2899 }
2900
2901 if (repl) {
748a9306 2902 OP *curop;
0244c3a4 2903 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2904 curop = 0;
57843af0
GS		 2905 if (CopLINE(PL_curcop) < PL_multi_end)
2906 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2907 }
554b3eca 2908#ifdef USE_THREADS
2faa37cc 2909 else if (repl->op_type == OP_THREADSV
554b3eca 2910 && strchr("&`'123456789+",
533c011a 2911 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2912 {
2913 curop = 0;
2914 }
2915#endif /* USE_THREADS */
748a9306
LW		 2916 else if (repl->op_type == OP_CONST)
2917 curop = repl;
79072805 2918 else {
79072805
LW		 2919 OP *lastop = 0;
2920 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2921 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2922#ifdef USE_THREADS
ce862d02
IZ		 2923 if (curop->op_type == OP_THREADSV) {
2924 repl_has_vars = 1;
be949f6f 2925 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2926 break;
554b3eca
MB		 2927 }
2928#else
79072805 2929 if (curop->op_type == OP_GV) {
638eceb6 2930 GV *gv = cGVOPx_gv(curop);
ce862d02 2931 repl_has_vars = 1;
93a17b20 2932 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2933 break;
2934 }
554b3eca 2935#endif /* USE_THREADS */
79072805
LW		 2936 else if (curop->op_type == OP_RV2CV)
2937 break;
2938 else if (curop->op_type == OP_RV2SV ||
2939 curop->op_type == OP_RV2AV ||
2940 curop->op_type == OP_RV2HV ||
2941 curop->op_type == OP_RV2GV) {
2942 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2943 break;
2944 }
748a9306
LW		 2945 else if (curop->op_type == OP_PADSV ||
2946 curop->op_type == OP_PADAV ||
2947 curop->op_type == OP_PADHV ||
554b3eca 2948 curop->op_type == OP_PADANY) {
ce862d02 2949 repl_has_vars = 1;
748a9306 2950 }
1167e5da
SM		 2951 else if (curop->op_type == OP_PUSHRE)
2952 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2953 else
2954 break;
2955 }
2956 lastop = curop;
2957 }
748a9306 2958 }
ce862d02
IZ		 2959 if (curop == repl
2960 && !(repl_has_vars
2961 && (!pm->op_pmregexp
2962 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2963 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2964 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2965 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2966 }
2967 else {
ce862d02
IZ		 2968 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2969 pm->op_pmflags |= PMf_MAYBE_CONST;
2970 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2971 }
b7dc083c 2972 NewOp(1101, rcop, 1, LOGOP);
748a9306 2973 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2974 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2975 rcop->op_first = scalar(repl);
2976 rcop->op_flags |= OPf_KIDS;
2977 rcop->op_private = 1;
11343788 2978 rcop->op_other = o;
748a9306
LW		 2979
2980 /* establish postfix order */
2981 rcop->op_next = LINKLIST(repl);
2982 repl->op_next = (OP*)rcop;
2983
2984 pm->op_pmreplroot = scalar((OP*)rcop);
2985 pm->op_pmreplstart = LINKLIST(rcop);
2986 rcop->op_next = 0;
79072805
LW		 2987 }
2988 }
2989
2990 return (OP*)pm;
2991}
2992
2993OP *
864dbfa3 2994Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2995{
2996 SVOP *svop;
b7dc083c 2997 NewOp(1101, svop, 1, SVOP);
79072805 2998 svop->op_type = type;
22c35a8c 2999 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3000 svop->op_sv = sv;
3001 svop->op_next = (OP*)svop;
3002 svop->op_flags = flags;
22c35a8c 3003 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3004 scalar((OP*)svop);
22c35a8c 3005 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3006 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3007 return CHECKOP(type, svop);
79072805
LW		 3008}
3009
3010OP *
350de78d
GS		 3011Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3012{
3013 PADOP *padop;
3014 NewOp(1101, padop, 1, PADOP);
3015 padop->op_type = type;
3016 padop->op_ppaddr = PL_ppaddr[type];
3017 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3018 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3019 PL_curpad[padop->op_padix] = sv;
7766f137 3020 SvPADTMP_on(sv);
350de78d
GS		 3021 padop->op_next = (OP*)padop;
3022 padop->op_flags = flags;
3023 if (PL_opargs[type] & OA_RETSCALAR)
3024 scalar((OP*)padop);
3025 if (PL_opargs[type] & OA_TARGET)
3026 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3027 return CHECKOP(type, padop);
3028}
3029
3030OP *
864dbfa3 3031Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3032{
11343788 3033 dTHR;
350de78d 3034#ifdef USE_ITHREADS
743e66e6 3035 GvIN_PAD_on(gv);
350de78d
GS		 3036 return newPADOP(type, flags, SvREFCNT_inc(gv));
3037#else
7934575e 3038 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3039#endif
79072805
LW		 3040}
3041
3042OP *
864dbfa3 3043Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3044{
3045 PVOP *pvop;
b7dc083c 3046 NewOp(1101, pvop, 1, PVOP);
79072805 3047 pvop->op_type = type;
22c35a8c 3048 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3049 pvop->op_pv = pv;
3050 pvop->op_next = (OP*)pvop;
3051 pvop->op_flags = flags;
22c35a8c 3052 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3053 scalar((OP*)pvop);
22c35a8c 3054 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3055 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3056 return CHECKOP(type, pvop);
79072805
LW		 3057}
3058
79072805 3059void
864dbfa3 3060Perl_package(pTHX_ OP *o)
79072805 3061{
11343788 3062 dTHR;
93a17b20 3063 SV *sv;
79072805 3064
3280af22
NIS		 3065 save_hptr(&PL_curstash);
3066 save_item(PL_curstname);
11343788 3067 if (o) {
463ee0b2
LW		 3068 STRLEN len;
3069 char *name;
11343788 3070 sv = cSVOPo->op_sv;
463ee0b2 3071 name = SvPV(sv, len);
3280af22
NIS		 3072 PL_curstash = gv_stashpvn(name,len,TRUE);
3073 sv_setpvn(PL_curstname, name, len);
11343788 3074 op_free(o);
93a17b20
LW		 3075 }
3076 else {
3280af22
NIS		 3077 sv_setpv(PL_curstname,"<none>");
3078 PL_curstash = Nullhv;
93a17b20 3079 }
7ad382f4 3080 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3081 PL_copline = NOLINE;
3082 PL_expect = XSTATE;
79072805
LW		 3083}
3084
85e6fe83 3085void
864dbfa3 3086Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3087{
a0d0e21e 3088 OP *pack;
a0d0e21e
LW		 3089 OP *rqop;
3090 OP *imop;
b1cb66bf 3091 OP *veop;
78ca652e 3092 GV *gv;
85e6fe83 3093
a0d0e21e 3094 if (id->op_type != OP_CONST)
cea2e8a9 3095 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3096
b1cb66bf 3097 veop = Nullop;
3098
0f79a09d 3099 if (version != Nullop) {
b1cb66bf 3100 SV *vesv = ((SVOP*)version)->op_sv;
3101
44dcb63b 3102 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3103 arg = version;
3104 }
3105 else {
3106 OP *pack;
0f79a09d 3107 SV *meth;
b1cb66bf 3108
44dcb63b 3109 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3110 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3111
3112 /* Make copy of id so we don't free it twice */
3113 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3114
3115 /* Fake up a method call to VERSION */
0f79a09d
GS		 3116 meth = newSVpvn("VERSION",7);
3117 sv_upgrade(meth, SVt_PVIV);
155aba94 3118 (void)SvIOK_on(meth);
0f79a09d 3119 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3120 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3121 append_elem(OP_LIST,
0f79a09d
GS		 3122 prepend_elem(OP_LIST, pack, list(version)),
3123 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3124 }
3125 }
aeea060c 3126
a0d0e21e 3127 /* Fake up an import/unimport */
4633a7c4
LW		 3128 if (arg && arg->op_type == OP_STUB)
3129 imop = arg; /* no import on explicit () */
44dcb63b 3130 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3131 imop = Nullop; /* use 5.0; */
3132 }
4633a7c4 3133 else {
0f79a09d
GS		 3134 SV *meth;
3135
4633a7c4
LW		 3136 /* Make copy of id so we don't free it twice */
3137 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3138
3139 /* Fake up a method call to import/unimport */
3140 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3141 sv_upgrade(meth, SVt_PVIV);
155aba94 3142 (void)SvIOK_on(meth);
0f79a09d 3143 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3144 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3145 append_elem(OP_LIST,
3146 prepend_elem(OP_LIST, pack, list(arg)),
3147 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3148 }
3149
78ca652e
GS		 3150 /* Fake up a require, handle override, if any */
3151 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3152 if (!(gv && GvIMPORTED_CV(gv)))
3153 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3154
3155 if (gv && GvIMPORTED_CV(gv)) {
3156 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3157 append_elem(OP_LIST, id,
3158 scalar(newUNOP(OP_RV2CV, 0,
3159 newGVOP(OP_GV, 0,
3160 gv))))));
3161 }
3162 else {
3163 rqop = newUNOP(OP_REQUIRE, 0, id);
3164 }
a0d0e21e
LW		 3165
3166 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3167 newATTRSUB(floor,
79cb57f6 3168 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3169 Nullop,
09bef843 3170 Nullop,
a0d0e21e 3171 append_elem(OP_LINESEQ,
b1cb66bf 3172 append_elem(OP_LINESEQ,
3173 newSTATEOP(0, Nullch, rqop),
3174 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3175 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3176
c305c6a0 3177 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3178 PL_copline = NOLINE;
3179 PL_expect = XSTATE;
85e6fe83
LW		 3180}
3181
e4783991
GS		 3182void
3183Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3184{
3185 va_list args;
3186 va_start(args, ver);
3187 vload_module(flags, name, ver, &args);
3188 va_end(args);
3189}
3190
3191#ifdef PERL_IMPLICIT_CONTEXT
3192void
3193Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3194{
3195 dTHX;
3196 va_list args;
3197 va_start(args, ver);
3198 vload_module(flags, name, ver, &args);
3199 va_end(args);
3200}
3201#endif
3202
3203void
3204Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3205{
3206 OP *modname, *veop, *imop;
3207
3208 modname = newSVOP(OP_CONST, 0, name);
3209 modname->op_private |= OPpCONST_BARE;
3210 if (ver) {
3211 veop = newSVOP(OP_CONST, 0, ver);
3212 }
3213 else
3214 veop = Nullop;
3215 if (flags & PERL_LOADMOD_NOIMPORT) {
3216 imop = sawparens(newNULLLIST());
3217 }
3218 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3219 imop = va_arg(*args, OP*);
3220 }
3221 else {
3222 SV *sv;
3223 imop = Nullop;
3224 sv = va_arg(*args, SV*);
3225 while (sv) {
3226 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3227 sv = va_arg(*args, SV*);
3228 }
3229 }
81885997
GS		 3230 {
3231 line_t ocopline = PL_copline;
3232 int oexpect = PL_expect;
3233
3234 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3235 veop, modname, imop);
3236 PL_expect = oexpect;
3237 PL_copline = ocopline;
3238 }
e4783991
GS		 3239}
3240
79072805 3241OP *
864dbfa3 3242Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3243{
3244 OP *doop;
3245 GV *gv;
3246
3247 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3248 if (!(gv && GvIMPORTED_CV(gv)))
3249 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3250
3251 if (gv && GvIMPORTED_CV(gv)) {
3252 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3253 append_elem(OP_LIST, term,
3254 scalar(newUNOP(OP_RV2CV, 0,
3255 newGVOP(OP_GV, 0,
3256 gv))))));
3257 }
3258 else {
3259 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3260 }
3261 return doop;
3262}
3263
3264OP *
864dbfa3 3265Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3266{
3267 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3268 list(force_list(subscript)),
3269 list(force_list(listval)) );
79072805
LW		 3270}
3271
76e3520e 3272STATIC I32
cea2e8a9 3273S_list_assignment(pTHX_ register OP *o)
79072805 3274{
11343788 3275 if (!o)
79072805
LW		 3276 return TRUE;
3277
11343788
MB		 3278 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3279 o = cUNOPo->op_first;
79072805 3280
11343788 3281 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3282 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3283 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3284
3285 if (t && f)
3286 return TRUE;
3287 if (t || f)
3288 yyerror("Assignment to both a list and a scalar");
3289 return FALSE;
3290 }
3291
11343788
MB		 3292 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3293 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3294 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3295 return TRUE;
3296
11343788 3297 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3298 return TRUE;
3299
11343788 3300 if (o->op_type == OP_RV2SV)
79072805
LW		 3301 return FALSE;
3302
3303 return FALSE;
3304}
3305
3306OP *
864dbfa3 3307Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3308{
11343788 3309 OP *o;
79072805 3310
a0d0e21e
LW		 3311 if (optype) {
3312 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3313 return newLOGOP(optype, 0,
3314 mod(scalar(left), optype),
3315 newUNOP(OP_SASSIGN, 0, scalar(right)));
3316 }
3317 else {
3318 return newBINOP(optype, OPf_STACKED,
3319 mod(scalar(left), optype), scalar(right));
3320 }
3321 }
3322
79072805 3323 if (list_assignment(left)) {
6ee623d5 3324 dTHR;
10c8fecd
GS		 3325 OP *curop;
3326
3280af22
NIS		 3327 PL_modcount = 0;
3328 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3329 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3330 if (PL_eval_start)
3331 PL_eval_start = 0;
748a9306 3332 else {
a0d0e21e
LW		 3333 op_free(left);
3334 op_free(right);
3335 return Nullop;
3336 }
10c8fecd
GS		 3337 curop = list(force_list(left));
3338 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3339 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3340 for (curop = ((LISTOP*)curop)->op_first;
3341 curop; curop = curop->op_sibling)
3342 {
3343 if (curop->op_type == OP_RV2HV &&
3344 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3345 o->op_private |= OPpASSIGN_HASH;
3346 break;
3347 }
3348 }
a0d0e21e 3349 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3350 OP *lastop = o;
3280af22 3351 PL_generation++;
11343788 3352 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3353 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3354 if (curop->op_type == OP_GV) {
638eceb6 3355 GV *gv = cGVOPx_gv(curop);
3280af22 3356 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3357 break;
3280af22 3358 SvCUR(gv) = PL_generation;
79072805 3359 }
748a9306
LW		 3360 else if (curop->op_type == OP_PADSV ||
3361 curop->op_type == OP_PADAV ||
3362 curop->op_type == OP_PADHV ||
3363 curop->op_type == OP_PADANY) {
3280af22 3364 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3365 SV *sv = svp[curop->op_targ];
3280af22 3366 if (SvCUR(sv) == PL_generation)
748a9306 3367 break;
3280af22 3368 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3369 }
79072805
LW		 3370 else if (curop->op_type == OP_RV2CV)
3371 break;
3372 else if (curop->op_type == OP_RV2SV ||
3373 curop->op_type == OP_RV2AV ||
3374 curop->op_type == OP_RV2HV ||
3375 curop->op_type == OP_RV2GV) {
3376 if (lastop->op_type != OP_GV) /* funny deref? */
3377 break;
3378 }
1167e5da
SM		 3379 else if (curop->op_type == OP_PUSHRE) {
3380 if (((PMOP*)curop)->op_pmreplroot) {
3381 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3382 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3383 break;
3280af22 3384 SvCUR(gv) = PL_generation;
1167e5da
SM		 3385 }
3386 }
79072805
LW		 3387 else
3388 break;
3389 }
3390 lastop = curop;
3391 }
11343788 3392 if (curop != o)
10c8fecd 3393 o->op_private |= OPpASSIGN_COMMON;
79072805 3394 }
c07a80fd 3395 if (right && right->op_type == OP_SPLIT) {
3396 OP* tmpop;
3397 if ((tmpop = ((LISTOP*)right)->op_first) &&
3398 tmpop->op_type == OP_PUSHRE)
3399 {
3400 PMOP *pm = (PMOP*)tmpop;
3401 if (left->op_type == OP_RV2AV &&
3402 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3403 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3404 {
3405 tmpop = ((UNOP*)left)->op_first;
3406 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3407#ifdef USE_ITHREADS
3408 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3409 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3410#else
3411 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3412 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3413#endif
c07a80fd 3414 pm->op_pmflags |= PMf_ONCE;
11343788 3415 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3416 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3417 tmpop->op_sibling = Nullop; /* don't free split */
3418 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3419 op_free(o); /* blow off assign */
54310121 3420 right->op_flags &= ~OPf_WANT;
a5f75d66 3421 /* "I don't know and I don't care." */
c07a80fd 3422 return right;
3423 }
3424 }
3425 else {
3280af22 3426 if (PL_modcount < 10000 &&
c07a80fd 3427 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3428 {
3429 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3430 if (SvIVX(sv) == 0)
3280af22 3431 sv_setiv(sv, PL_modcount+1);
c07a80fd 3432 }
3433 }
3434 }
3435 }
11343788 3436 return o;
79072805
LW		 3437 }
3438 if (!right)
3439 right = newOP(OP_UNDEF, 0);
3440 if (right->op_type == OP_READLINE) {
3441 right->op_flags |= OPf_STACKED;
463ee0b2 3442 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3443 }
a0d0e21e 3444 else {
3280af22 3445 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3446 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3447 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3448 if (PL_eval_start)
3449 PL_eval_start = 0;
748a9306 3450 else {
11343788 3451 op_free(o);
a0d0e21e
LW		 3452 return Nullop;
3453 }
3454 }
11343788 3455 return o;
79072805
LW		 3456}
3457
3458OP *
864dbfa3 3459Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3460{
11343788 3461 dTHR;
bbce6d69 3462 U32 seq = intro_my();
79072805
LW		 3463 register COP *cop;
3464
b7dc083c 3465 NewOp(1101, cop, 1, COP);
57843af0 3466 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3467 cop->op_type = OP_DBSTATE;
22c35a8c 3468 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3469 }
3470 else {
3471 cop->op_type = OP_NEXTSTATE;
22c35a8c 3472 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3473 }
79072805 3474 cop->op_flags = flags;
393fec97 3475 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3476#ifdef NATIVE_HINTS
3477 cop->op_private |= NATIVE_HINTS;
3478#endif
e24b16f9 3479 PL_compiling.op_private = cop->op_private;
79072805
LW		 3480 cop->op_next = (OP*)cop;
3481
463ee0b2
LW		 3482 if (label) {
3483 cop->cop_label = label;
3280af22 3484 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3485 }
bbce6d69 3486 cop->cop_seq = seq;
3280af22 3487 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3488 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3489 cop->cop_warnings = PL_curcop->cop_warnings ;
3490 else
3491 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3492
79072805 3493
3280af22 3494 if (PL_copline == NOLINE)
57843af0 3495 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3496 else {
57843af0 3497 CopLINE_set(cop, PL_copline);
3280af22 3498 PL_copline = NOLINE;
79072805 3499 }
57843af0
GS		 3500#ifdef USE_ITHREADS
3501 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3502#else
cc49e20b 3503 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3504#endif
11faa288 3505 CopSTASH_set(cop, PL_curstash);
79072805 3506
3280af22 3507 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3508 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3509 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3510 (void)SvIOK_on(*svp);
57b2e452 3511 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3512 }
3513 }
3514
11343788 3515 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3516}
3517
bbce6d69 3518/* "Introduce" my variables to visible status. */
3519U32
864dbfa3 3520Perl_intro_my(pTHX)
bbce6d69 3521{
3522 SV **svp;
3523 SV *sv;
3524 I32 i;
3525
3280af22
NIS		 3526 if (! PL_min_intro_pending)
3527 return PL_cop_seqmax;
bbce6d69 3528
3280af22
NIS		 3529 svp = AvARRAY(PL_comppad_name);
3530 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3531 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3532 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3533 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3534 }
3535 }
3280af22
NIS		 3536 PL_min_intro_pending = 0;
3537 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3538 return PL_cop_seqmax++;
bbce6d69 3539}
3540
79072805 3541OP *
864dbfa3 3542Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3543{
883ffac3
CS		 3544 return new_logop(type, flags, &first, &other);
3545}
3546
3bd495df 3547STATIC OP *
cea2e8a9 3548S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3549{
11343788 3550 dTHR;
79072805 3551 LOGOP *logop;
11343788 3552 OP *o;
883ffac3
CS		 3553 OP *first = *firstp;
3554 OP *other = *otherp;
79072805 3555
a0d0e21e
LW		 3556 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3557 return newBINOP(type, flags, scalar(first), scalar(other));
3558
8990e307 3559 scalarboolean(first);
79072805
LW		 3560 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3561 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3562 if (type == OP_AND || type == OP_OR) {
3563 if (type == OP_AND)
3564 type = OP_OR;
3565 else
3566 type = OP_AND;
11343788 3567 o = first;
883ffac3 3568 first = *firstp = cUNOPo->op_first;
11343788
MB		 3569 if (o->op_next)
3570 first->op_next = o->op_next;
3571 cUNOPo->op_first = Nullop;
3572 op_free(o);
79072805
LW		 3573 }
3574 }
3575 if (first->op_type == OP_CONST) {
4673fc70 3576 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
e476b1b5 3577 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3578 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3579 op_free(first);
883ffac3 3580 *firstp = Nullop;
79072805
LW		 3581 return other;
3582 }
3583 else {
3584 op_free(other);
883ffac3 3585 *otherp = Nullop;
79072805
LW		 3586 return first;
3587 }
3588 }
3589 else if (first->op_type == OP_WANTARRAY) {
3590 if (type == OP_AND)
3591 list(other);
3592 else
3593 scalar(other);
3594 }
e476b1b5 3595 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3596 OP *k1 = ((UNOP*)first)->op_first;
3597 OP *k2 = k1->op_sibling;
3598 OPCODE warnop = 0;
3599 switch (first->op_type)
3600 {
3601 case OP_NULL:
3602 if (k2 && k2->op_type == OP_READLINE
3603 && (k2->op_flags & OPf_STACKED)
55d729e4 3604 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3605 {
a6006777 3606 warnop = k2->op_type;
72b16652 3607 }
a6006777 3608 break;
3609
3610 case OP_SASSIGN:
68dc0745 3611 if (k1->op_type == OP_READDIR
3612 || k1->op_type == OP_GLOB
72b16652 3613 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3614 || k1->op_type == OP_EACH)
72b16652
GS		 3615 {
3616 warnop = ((k1->op_type == OP_NULL)
3617 ? k1->op_targ : k1->op_type);
3618 }
a6006777 3619 break;
3620 }
8ebc5c01 3621 if (warnop) {
57843af0
GS		 3622 line_t oldline = CopLINE(PL_curcop);
3623 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3624 Perl_warner(aTHX_ WARN_MISC,
599cee73 3625 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3626 PL_op_desc[warnop],
68dc0745 3627 ((warnop == OP_READLINE || warnop == OP_GLOB)
3628 ? " construct" : "() operator"));
57843af0 3629 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3630 }
a6006777 3631 }
79072805
LW		 3632
3633 if (!other)
3634 return first;
3635
a0d0e21e
LW		 3636 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3637 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3638
b7dc083c 3639 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3640
3641 logop->op_type = type;
22c35a8c 3642 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3643 logop->op_first = first;
3644 logop->op_flags = flags | OPf_KIDS;
3645 logop->op_other = LINKLIST(other);
c07a80fd 3646 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3647
3648 /* establish postfix order */
3649 logop->op_next = LINKLIST(first);
3650 first->op_next = (OP*)logop;
3651 first->op_sibling = other;
3652
11343788
MB		 3653 o = newUNOP(OP_NULL, 0, (OP*)logop);
3654 other->op_next = o;
79072805 3655
11343788 3656 return o;
79072805
LW		 3657}
3658
3659OP *
864dbfa3 3660Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3661{
11343788 3662 dTHR;
1a67a97c
SM		 3663 LOGOP *logop;
3664 OP *start;
11343788 3665 OP *o;
79072805 3666
b1cb66bf 3667 if (!falseop)
3668 return newLOGOP(OP_AND, 0, first, trueop);
3669 if (!trueop)
3670 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3671
8990e307 3672 scalarboolean(first);
79072805
LW		 3673 if (first->op_type == OP_CONST) {
3674 if (SvTRUE(((SVOP*)first)->op_sv)) {
3675 op_free(first);
b1cb66bf 3676 op_free(falseop);
3677 return trueop;
79072805
LW		 3678 }
3679 else {
3680 op_free(first);
b1cb66bf 3681 op_free(trueop);
3682 return falseop;
79072805
LW		 3683 }
3684 }
3685 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3686 list(trueop);
3687 scalar(falseop);
79072805 3688 }
1a67a97c
SM		 3689 NewOp(1101, logop, 1, LOGOP);
3690 logop->op_type = OP_COND_EXPR;
3691 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3692 logop->op_first = first;
3693 logop->op_flags = flags | OPf_KIDS;
3694 logop->op_private = 1 | (flags >> 8);
3695 logop->op_other = LINKLIST(trueop);
3696 logop->op_next = LINKLIST(falseop);
79072805 3697
79072805
LW		 3698
3699 /* establish postfix order */
1a67a97c
SM		 3700 start = LINKLIST(first);
3701 first->op_next = (OP*)logop;
79072805 3702
b1cb66bf 3703 first->op_sibling = trueop;
3704 trueop->op_sibling = falseop;
1a67a97c 3705 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3706
1a67a97c 3707 trueop->op_next = falseop->op_next = o;
79072805 3708
1a67a97c 3709 o->op_next = start;
11343788 3710 return o;
79072805
LW		 3711}
3712
3713OP *
864dbfa3 3714Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3715{
b35b2403 3716 dTHR;
1a67a97c 3717 LOGOP *range;
79072805
LW		 3718 OP *flip;
3719 OP *flop;
1a67a97c 3720 OP *leftstart;
11343788 3721 OP *o;
79072805 3722
1a67a97c 3723 NewOp(1101, range, 1, LOGOP);
79072805 3724
1a67a97c
SM		 3725 range->op_type = OP_RANGE;
3726 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3727 range->op_first = left;
3728 range->op_flags = OPf_KIDS;
3729 leftstart = LINKLIST(left);
3730 range->op_other = LINKLIST(right);
3731 range->op_private = 1 | (flags >> 8);
79072805
LW		 3732
3733 left->op_sibling = right;
3734
1a67a97c
SM		 3735 range->op_next = (OP*)range;
3736 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3737 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3738 o = newUNOP(OP_NULL, 0, flop);
79072805 3739 linklist(flop);
1a67a97c 3740 range->op_next = leftstart;
79072805
LW		 3741
3742 left->op_next = flip;
3743 right->op_next = flop;
3744
1a67a97c
SM		 3745 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3746 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3747 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3748 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3749
3750 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3751 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3752
11343788 3753 flip->op_next = o;
79072805 3754 if (!flip->op_private || !flop->op_private)
11343788 3755 linklist(o); /* blow off optimizer unless constant */
79072805 3756
11343788 3757 return o;
79072805
LW		 3758}
3759
3760OP *
864dbfa3 3761Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3762{
11343788 3763 dTHR;
463ee0b2 3764 OP* listop;
11343788 3765 OP* o;
463ee0b2 3766 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3767 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3768
463ee0b2
LW		 3769 if (expr) {
3770 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3771 return block; /* do {} while 0 does once */
fb73857a 3772 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3773 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3774 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3775 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3776 } else if (expr->op_flags & OPf_KIDS) {
3777 OP *k1 = ((UNOP*)expr)->op_first;
3778 OP *k2 = (k1) ? k1->op_sibling : NULL;
3779 switch (expr->op_type) {
3780 case OP_NULL:
3781 if (k2 && k2->op_type == OP_READLINE
3782 && (k2->op_flags & OPf_STACKED)
3783 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3784 expr = newUNOP(OP_DEFINED, 0, expr);
3785 break;
3786
3787 case OP_SASSIGN:
3788 if (k1->op_type == OP_READDIR
3789 || k1->op_type == OP_GLOB
72b16652 3790 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3791 || k1->op_type == OP_EACH)
3792 expr = newUNOP(OP_DEFINED, 0, expr);
3793 break;
3794 }
774d564b 3795 }
463ee0b2 3796 }
93a17b20 3797
8990e307 3798 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3799 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3800
883ffac3
CS		 3801 if (listop)
3802 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3803
11343788
MB		 3804 if (once && o != listop)
3805 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3806
11343788
MB		 3807 if (o == listop)
3808 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3809
11343788
MB		 3810 o->op_flags |= flags;
3811 o = scope(o);
3812 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3813 return o;
79072805
LW		 3814}
3815
3816OP *
864dbfa3 3817Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3818{
11343788 3819 dTHR;
79072805
LW		 3820 OP *redo;
3821 OP *next = 0;
3822 OP *listop;
11343788 3823 OP *o;
79072805 3824 OP *condop;
1ba6ee2b 3825 U8 loopflags = 0;
79072805 3826
fb73857a 3827 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3828 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3829 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3830 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3831 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3832 OP *k1 = ((UNOP*)expr)->op_first;
3833 OP *k2 = (k1) ? k1->op_sibling : NULL;
3834 switch (expr->op_type) {
3835 case OP_NULL:
3836 if (k2 && k2->op_type == OP_READLINE
3837 && (k2->op_flags & OPf_STACKED)
3838 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3839 expr = newUNOP(OP_DEFINED, 0, expr);
3840 break;
3841
3842 case OP_SASSIGN:
3843 if (k1->op_type == OP_READDIR
3844 || k1->op_type == OP_GLOB
72b16652 3845 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3846 || k1->op_type == OP_EACH)
3847 expr = newUNOP(OP_DEFINED, 0, expr);
3848 break;
3849 }
748a9306 3850 }
79072805
LW		 3851
3852 if (!block)
3853 block = newOP(OP_NULL, 0);
87246558
GS		 3854 else if (cont) {
3855 block = scope(block);
3856 }
79072805 3857
1ba6ee2b 3858 if (cont) {
79072805 3859 next = LINKLIST(cont);
1ba6ee2b
GS		 3860 loopflags |= OPpLOOP_CONTINUE;
3861 }
fb73857a 3862 if (expr) {
85538317
GS		 3863 OP *unstack = newOP(OP_UNSTACK, 0);
3864 if (!next)
3865 next = unstack;
3866 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3867 if ((line_t)whileline != NOLINE) {
3280af22 3868 PL_copline = whileline;
fb73857a 3869 cont = append_elem(OP_LINESEQ, cont,
3870 newSTATEOP(0, Nullch, Nullop));
3871 }
3872 }
79072805 3873
463ee0b2 3874 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3875 redo = LINKLIST(listop);
3876
3877 if (expr) {
3280af22 3878 PL_copline = whileline;
883ffac3
CS		 3879 scalar(listop);
3880 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3881 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3882 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3883 op_free((OP*)loop);
883ffac3 3884 return Nullop; /* listop already freed by new_logop */
463ee0b2 3885 }
883ffac3
CS		 3886 if (listop)
3887 ((LISTOP*)listop)->op_last->op_next = condop =
3888 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3889 }
3890 else
11343788 3891 o = listop;
79072805
LW		 3892
3893 if (!loop) {
b7dc083c 3894 NewOp(1101,loop,1,LOOP);
79072805 3895 loop->op_type = OP_ENTERLOOP;
22c35a8c 3896 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3897 loop->op_private = 0;
3898 loop->op_next = (OP*)loop;
3899 }
3900
11343788 3901 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3902
3903 loop->op_redoop = redo;
11343788 3904 loop->op_lastop = o;
1ba6ee2b 3905 o->op_private |= loopflags;
79072805
LW		 3906
3907 if (next)
3908 loop->op_nextop = next;
3909 else
11343788 3910 loop->op_nextop = o;
79072805 3911
11343788
MB		 3912 o->op_flags |= flags;
3913 o->op_private |= (flags >> 8);
3914 return o;
79072805
LW		 3915}
3916
3917OP *
864dbfa3 3918Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3919{
3920 LOOP *loop;
fb73857a 3921 OP *wop;
85e6fe83 3922 int padoff = 0;
4633a7c4 3923 I32 iterflags = 0;
79072805 3924
79072805 3925 if (sv) {
85e6fe83 3926 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3927 sv->op_type = OP_RV2GV;
22c35a8c 3928 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3929 }
85e6fe83
LW		 3930 else if (sv->op_type == OP_PADSV) { /* private variable */
3931 padoff = sv->op_targ;
743e66e6 3932 sv->op_targ = 0;
85e6fe83
LW		 3933 op_free(sv);
3934 sv = Nullop;
3935 }
54b9620d
MB		 3936 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3937 padoff = sv->op_targ;
743e66e6 3938 sv->op_targ = 0;
54b9620d
MB		 3939 iterflags |= OPf_SPECIAL;
3940 op_free(sv);
3941 sv = Nullop;
3942 }
79072805 3943 else
cea2e8a9 3944 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3945 }
3946 else {
54b9620d
MB		 3947#ifdef USE_THREADS
3948 padoff = find_threadsv("_");
3949 iterflags |= OPf_SPECIAL;
3950#else
3280af22 3951 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3952#endif
79072805 3953 }
5f05dabc 3954 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3955 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3956 iterflags |= OPf_STACKED;
3957 }
89ea2908
GA		 3958 else if (expr->op_type == OP_NULL &&
3959 (expr->op_flags & OPf_KIDS) &&
3960 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3961 {
3962 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3963 * set the STACKED flag to indicate that these values are to be
3964 * treated as min/max values by 'pp_iterinit'.
3965 */
3966 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3967 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3968 OP* left = range->op_first;
3969 OP* right = left->op_sibling;
5152d7c7 3970 LISTOP* listop;
89ea2908
GA		 3971
3972 range->op_flags &= ~OPf_KIDS;
3973 range->op_first = Nullop;
3974
5152d7c7 3975 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3976 listop->op_first->op_next = range->op_next;
3977 left->op_next = range->op_other;
5152d7c7
GS		 3978 right->op_next = (OP*)listop;
3979 listop->op_next = listop->op_first;
89ea2908
GA		 3980
3981 op_free(expr);
5152d7c7 3982 expr = (OP*)(listop);
89ea2908
GA		 3983 null(expr);
3984 iterflags |= OPf_STACKED;
3985 }
3986 else {
3987 expr = mod(force_list(expr), OP_GREPSTART);
3988 }
3989
3990
4633a7c4 3991 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3992 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3993 assert(!loop->op_next);
b7dc083c 3994#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 3995 {
3996 LOOP *tmp;
3997 NewOp(1234,tmp,1,LOOP);
3998 Copy(loop,tmp,1,LOOP);
3999 loop = tmp;
4000 }
b7dc083c 4001#else
85e6fe83 4002 Renew(loop, 1, LOOP);
b7dc083c 4003#endif
85e6fe83 4004 loop->op_targ = padoff;
fb73857a 4005 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4006 PL_copline = forline;
fb73857a 4007 return newSTATEOP(0, label, wop);
79072805
LW		 4008}
4009
8990e307 4010OP*
864dbfa3 4011Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4012{
11343788
MB		 4013 dTHR;
4014 OP *o;
2d8e6c8d
GS		 4015 STRLEN n_a;
4016
8990e307 4017 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4018 /* "last()" means "last" */
4019 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4020 o = newOP(type, OPf_SPECIAL);
4021 else {
4022 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4023 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4024 : ""));
4025 }
8990e307
LW		 4026 op_free(label);
4027 }
4028 else {
a0d0e21e
LW		 4029 if (label->op_type == OP_ENTERSUB)
4030 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4031 o = newUNOP(type, OPf_STACKED, label);
8990e307 4032 }
3280af22 4033 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4034 return o;
8990e307
LW		 4035}
4036
79072805 4037void
864dbfa3 4038Perl_cv_undef(pTHX_ CV *cv)
79072805 4039{
11343788
MB		 4040 dTHR;
4041#ifdef USE_THREADS
e858de61
MB		 4042 if (CvMUTEXP(cv)) {
4043 MUTEX_DESTROY(CvMUTEXP(cv));
4044 Safefree(CvMUTEXP(cv));
4045 CvMUTEXP(cv) = 0;
4046 }
11343788
MB		 4047#endif /* USE_THREADS */
4048
a0d0e21e 4049 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4050#ifdef USE_THREADS
4051 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4052 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4053#else
a0d0e21e 4054 if (CvDEPTH(cv))
cea2e8a9 4055 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4056#endif /* USE_THREADS */
8990e307 4057 ENTER;
a0d0e21e 4058
7766f137 4059 SAVEVPTR(PL_curpad);
3280af22 4060 PL_curpad = 0;
a0d0e21e 4061
a5f75d66 4062 if (!CvCLONED(cv))
748a9306 4063 op_free(CvROOT(cv));
79072805 4064 CvROOT(cv) = Nullop;
8990e307 4065 LEAVE;
79072805 4066 }
1d5db326 4067 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4068 CvFLAGS(cv) = 0;
8e07c86e
AD		 4069 SvREFCNT_dec(CvGV(cv));
4070 CvGV(cv) = Nullgv;
4071 SvREFCNT_dec(CvOUTSIDE(cv));
4072 CvOUTSIDE(cv) = Nullcv;
4073 if (CvPADLIST(cv)) {
8ebc5c01 4074 /* may be during global destruction */
4075 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4076 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4077 while (i >= 0) {
4078 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4079 SV* sv = svp ? *svp : Nullsv;
4080 if (!sv)
4081 continue;
3280af22
NIS		 4082 if (sv == (SV*)PL_comppad_name)
4083 PL_comppad_name = Nullav;
4084 else if (sv == (SV*)PL_comppad) {
4085 PL_comppad = Nullav;
4086 PL_curpad = Null(SV**);
46fc3d4c 4087 }
4088 SvREFCNT_dec(sv);
8ebc5c01 4089 }
4090 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4091 }
8e07c86e
AD		 4092 CvPADLIST(cv) = Nullav;
4093 }
79072805
LW		 4094}
4095
76e3520e 4096STATIC void
743e66e6 4097S_cv_dump(pTHX_ CV *cv)
5f05dabc 4098{
62fde642 4099#ifdef DEBUGGING
5f05dabc 4100 CV *outside = CvOUTSIDE(cv);
4101 AV* padlist = CvPADLIST(cv);
4fdae800 4102 AV* pad_name;
4103 AV* pad;
4104 SV** pname;
4105 SV** ppad;
5f05dabc 4106 I32 ix;
4107
b900a521
JH		 4108 PerlIO_printf(Perl_debug_log,
4109 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4110 PTR2UV(cv),
ab50184a 4111 (CvANON(cv) ? "ANON"
6b88bc9c 4112 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4113 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4114 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4115 PTR2UV(outside),
ab50184a
CS		 4116 (!outside ? "null"
4117 : CvANON(outside) ? "ANON"
6b88bc9c 4118 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4119 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4120 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4121
4fdae800 4122 if (!padlist)
4123 return;
4124
4125 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4126 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4127 pname = AvARRAY(pad_name);
4128 ppad = AvARRAY(pad);
4129
93965878 4130 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4131 if (SvPOK(pname[ix]))
b900a521
JH		 4132 PerlIO_printf(Perl_debug_log,
4133 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4134 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4135 SvFAKE(pname[ix]) ? "FAKE " : "",
4136 SvPVX(pname[ix]),
b900a521
JH		 4137 (IV)I_32(SvNVX(pname[ix])),
4138 SvIVX(pname[ix]));
5f05dabc 4139 }
743e66e6 4140#endif /* DEBUGGING */
62fde642 4141}
5f05dabc 4142
76e3520e 4143STATIC CV *
cea2e8a9 4144S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4145{
11343788 4146 dTHR;
748a9306
LW		 4147 AV* av;
4148 I32 ix;
4149 AV* protopadlist = CvPADLIST(proto);
4150 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4151 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4152 SV** pname = AvARRAY(protopad_name);
4153 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4154 I32 fname = AvFILLp(protopad_name);
4155 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4156 AV* comppadlist;
4157 CV* cv;
4158
07055b4c
CS		 4159 assert(!CvUNIQUE(proto));
4160
748a9306 4161 ENTER;
354992b1 4162 SAVECOMPPAD();
3280af22
NIS		 4163 SAVESPTR(PL_comppad_name);
4164 SAVESPTR(PL_compcv);
748a9306 4165
3280af22 4166 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4167 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4168 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4169 CvCLONED_on(cv);
748a9306 4170
11343788 4171#ifdef USE_THREADS
12ca11f6 4172 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4173 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4174 CvOWNER(cv) = 0;
4175#endif /* USE_THREADS */
57843af0 4176 CvFILE(cv) = CvFILE(proto);
44a8e56a 4177 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4178 CvSTASH(cv) = CvSTASH(proto);
4179 CvROOT(cv) = CvROOT(proto);
4180 CvSTART(cv) = CvSTART(proto);
5f05dabc 4181 if (outside)
4182 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4183
68dc0745 4184 if (SvPOK(proto))
4185 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4186
3280af22 4187 PL_comppad_name = newAV();
46fc3d4c 4188 for (ix = fname; ix >= 0; ix--)
3280af22 4189 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4190
3280af22 4191 PL_comppad = newAV();
748a9306
LW		 4192
4193 comppadlist = newAV();
4194 AvREAL_off(comppadlist);
3280af22
NIS		 4195 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4196 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4197 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4198 av_fill(PL_comppad, AvFILLp(protopad));
4199 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4200
4201 av = newAV(); /* will be @_ */
4202 av_extend(av, 0);
3280af22 4203 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4204 AvFLAGS(av) = AVf_REIFY;
4205
9607fc9c 4206 for (ix = fpad; ix > 0; ix--) {
4207 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4208 if (namesv && namesv != &PL_sv_undef) {
aa689395 4209 char *name = SvPVX(namesv); /* XXX */
4210 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4211 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4212 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4213 if (!off)
3280af22 4214 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4215 else if (off != ix)
cea2e8a9 4216 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4217 }
4218 else { /* our own lexical */
aa689395 4219 SV* sv;
5f05dabc 4220 if (*name == '&') {
4221 /* anon code -- we'll come back for it */
4222 sv = SvREFCNT_inc(ppad[ix]);
4223 }
4224 else if (*name == '@')
4225 sv = (SV*)newAV();
748a9306 4226 else if (*name == '%')
5f05dabc 4227 sv = (SV*)newHV();
748a9306 4228 else
5f05dabc 4229 sv = NEWSV(0,0);
4230 if (!SvPADBUSY(sv))
4231 SvPADMY_on(sv);
3280af22 4232 PL_curpad[ix] = sv;
748a9306
LW		 4233 }
4234 }
7766f137 4235 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4236 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4237 }
748a9306 4238 else {
aa689395 4239 SV* sv = NEWSV(0,0);
748a9306 4240 SvPADTMP_on(sv);
3280af22 4241 PL_curpad[ix] = sv;
748a9306
LW		 4242 }
4243 }
4244
5f05dabc 4245 /* Now that vars are all in place, clone nested closures. */
4246
9607fc9c 4247 for (ix = fpad; ix > 0; ix--) {
4248 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4249 if (namesv
3280af22 4250 && namesv != &PL_sv_undef
aa689395 4251 && !(SvFLAGS(namesv) & SVf_FAKE)
4252 && *SvPVX(namesv) == '&'
5f05dabc 4253 && CvCLONE(ppad[ix]))
4254 {
4255 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4256 SvREFCNT_dec(ppad[ix]);
4257 CvCLONE_on(kid);
4258 SvPADMY_on(kid);
3280af22 4259 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4260 }
4261 }
4262
5f05dabc 4263#ifdef DEBUG_CLOSURES
ab50184a
CS		 4264 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4265 cv_dump(outside);
4266 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4267 cv_dump(proto);
ab50184a 4268 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4269 cv_dump(cv);
4270#endif
4271
748a9306
LW		 4272 LEAVE;
4273 return cv;
4274}
4275
4276CV *
864dbfa3 4277Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4278{
b099ddc0 4279 CV *cv;
1feb2720 4280 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4281 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4282 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4283 return cv;
5f05dabc 4284}
4285
3fe9a6f1 4286void
864dbfa3 4287Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4288{
0453d815
PM		 4289 dTHR;
4290
e476b1b5 4291 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4292 SV* msg = sv_newmortal();
3fe9a6f1 4293 SV* name = Nullsv;
4294
4295 if (gv)
46fc3d4c 4296 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4297 sv_setpv(msg, "Prototype mismatch:");
4298 if (name)
894356b3 4299 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4300 if (SvPOK(cv))
cea2e8a9 4301 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4302 sv_catpv(msg, " vs ");
4303 if (p)
cea2e8a9 4304 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4305 else
4306 sv_catpv(msg, "none");
e476b1b5 4307 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4308 }
4309}
4310
760ac839 4311SV *
864dbfa3 4312Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4313{
54310121 4314 if (!cv || !SvPOK(cv) || SvCUR(cv))
4315 return Nullsv;
fe5e78ed
GS		 4316 return op_const_sv(CvSTART(cv), cv);
4317}
760ac839 4318
fe5e78ed 4319SV *
864dbfa3 4320Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4321{
4322 SV *sv = Nullsv;
4323
0f79a09d 4324 if (!o)
fe5e78ed
GS		 4325 return Nullsv;
4326
0f79a09d 4327 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4328 o = cLISTOPo->op_first->op_sibling;
4329
4330 for (; o; o = o->op_next) {
54310121 4331 OPCODE type = o->op_type;
fe5e78ed 4332
acb36ea4 4333 if (sv && o->op_next == o)
fe5e78ed 4334 return sv;
54310121 4335 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4336 continue;
4337 if (type == OP_LEAVESUB || type == OP_RETURN)
4338 break;
4339 if (sv)
4340 return Nullsv;
7766f137 4341 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4342 sv = cSVOPo->op_sv;
7766f137 4343 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4344 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4345 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4346 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4347 return Nullsv;
760ac839 4348 }
54310121 4349 else
4350 return Nullsv;
760ac839 4351 }
5aabfad6 4352 if (sv)
4353 SvREADONLY_on(sv);
760ac839
LW		 4354 return sv;
4355}
4356
09bef843
SB		 4357void
4358Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4359{
4360 if (o)
4361 SAVEFREEOP(o);
4362 if (proto)
4363 SAVEFREEOP(proto);
4364 if (attrs)
4365 SAVEFREEOP(attrs);
4366 if (block)
4367 SAVEFREEOP(block);
4368 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4369}
4370
748a9306 4371CV *
864dbfa3 4372Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4373{
09bef843
SB		 4374 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4375}
4376
4377CV *
4378Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4379{
11343788 4380 dTHR;
2d8e6c8d 4381 STRLEN n_a;
83ee9e09
GS		 4382 char *name;
4383 char *aname;
4384 GV *gv;
2d8e6c8d 4385 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4386 register CV *cv=0;
a0d0e21e 4387 I32 ix;
79072805 4388
83ee9e09
GS		 4389 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4390 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4391 SV *sv = sv_newmortal();
4392 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4393 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4394 aname = SvPVX(sv);
4395 }
4396 else
4397 aname = Nullch;
4398 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4399 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4400 SVt_PVCV);
4401
11343788 4402 if (o)
5dc0d613 4403 SAVEFREEOP(o);
3fe9a6f1 4404 if (proto)
4405 SAVEFREEOP(proto);
09bef843
SB		 4406 if (attrs)
4407 SAVEFREEOP(attrs);
3fe9a6f1 4408
09bef843 4409 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4410 maximum a prototype before. */
4411 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4412 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4413 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4414 {
e476b1b5 4415 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4416 }
55d729e4
GS		 4417 cv_ckproto((CV*)gv, NULL, ps);
4418 }
4419 if (ps)
4420 sv_setpv((SV*)gv, ps);
4421 else
4422 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4423 SvREFCNT_dec(PL_compcv);
4424 cv = PL_compcv = NULL;
4425 PL_sub_generation++;
55d729e4
GS		 4426 goto noblock;
4427 }
4428
68dc0745 4429 if (!name || GvCVGEN(gv))
4430 cv = Nullcv;
155aba94 4431 else if ((cv = GvCV(gv))) {
3fe9a6f1 4432 cv_ckproto(cv, gv, ps);
68dc0745 4433 /* already defined (or promised)? */
4434 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4435 SV* const_sv;
fe5e78ed 4436 bool const_changed = TRUE;
09bef843 4437 if (!block && !attrs) {
aa689395 4438 /* just a "sub foo;" when &foo is already defined */
3280af22 4439 SAVEFREESV(PL_compcv);
aa689395 4440 goto done;
4441 }
7bac28a0 4442 /* ahem, death to those who redefine active sort subs */
3280af22 4443 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4444 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4445 if (!block)
4446 goto withattrs;
155aba94 4447 if ((const_sv = cv_const_sv(cv)))
fe5e78ed 4448 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
e476b1b5 4449 if ((const_sv || const_changed) && ckWARN(WARN_REDEFINE))
83ee9e09 4450 {
57843af0
GS		 4451 line_t oldline = CopLINE(PL_curcop);
4452 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4453 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4454 const_sv ? "Constant subroutine %s redefined"
09bef843 4455 : "Subroutine %s redefined", name);
57843af0 4456 CopLINE_set(PL_curcop, oldline);
79072805 4457 }
8990e307 4458 SvREFCNT_dec(cv);
68dc0745 4459 cv = Nullcv;
79072805
LW		 4460 }
4461 }
09bef843
SB		 4462 withattrs:
4463 if (attrs) {
4464 HV *stash;
4465 SV *rcv;
4466
4467 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4468 * before we clobber PL_compcv.
4469 */
4470 if (cv && !block) {
4471 rcv = (SV*)cv;
4472 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4473 stash = GvSTASH(CvGV(cv));
4474 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4475 stash = CvSTASH(cv);
4476 else
4477 stash = PL_curstash;
4478 }
4479 else {
4480 /* possibly about to re-define existing subr -- ignore old cv */
4481 rcv = (SV*)PL_compcv;
4482 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4483 stash = GvSTASH(gv);
4484 else
4485 stash = PL_curstash;
4486 }
4487 apply_attrs(stash, rcv, attrs);
4488 }
a0d0e21e 4489 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4490 if (!block) {
4491 /* got here with just attrs -- work done, so bug out */
4492 SAVEFREESV(PL_compcv);
4493 goto done;
4494 }
4633a7c4 4495 cv_undef(cv);
3280af22
NIS		 4496 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4497 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4498 CvOUTSIDE(PL_compcv) = 0;
4499 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4500 CvPADLIST(PL_compcv) = 0;
4501 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4502 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4503 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4504 }
4505 else {
3280af22 4506 cv = PL_compcv;
44a8e56a 4507 if (name) {
4508 GvCV(gv) = cv;
4509 GvCVGEN(gv) = 0;
3280af22 4510 PL_sub_generation++;
44a8e56a 4511 }
a0d0e21e 4512 }
44a8e56a 4513 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4514 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4515 CvSTASH(cv) = PL_curstash;
11343788
MB		 4516#ifdef USE_THREADS
4517 CvOWNER(cv) = 0;
1cfa4ec7 4518 if (!CvMUTEXP(cv)) {
f6aaf501 4519 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4520 MUTEX_INIT(CvMUTEXP(cv));
4521 }
11343788 4522#endif /* USE_THREADS */
8990e307 4523
3fe9a6f1 4524 if (ps)
4525 sv_setpv((SV*)cv, ps);
4633a7c4 4526
3280af22 4527 if (PL_error_count) {
c07a80fd 4528 op_free(block);
4529 block = Nullop;
68dc0745 4530 if (name) {
4531 char *s = strrchr(name, ':');
4532 s = s ? s+1 : name;
6d4c2119
CS		 4533 if (strEQ(s, "BEGIN")) {
4534 char *not_safe =
4535 "BEGIN not safe after errors--compilation aborted";
faef0170 4536 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4537 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4538 else {
4539 /* force display of errors found but not reported */
38a03e6e 4540 sv_catpv(ERRSV, not_safe);
cea2e8a9 4541 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4542 }
4543 }
68dc0745 4544 }
c07a80fd 4545 }
a0d0e21e 4546 if (!block) {
55d729e4 4547 noblock:
3280af22 4548 PL_copline = NOLINE;
a0d0e21e
LW		 4549 LEAVE_SCOPE(floor);
4550 return cv;
4551 }
4552
3280af22
NIS		 4553 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4554 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4555
7766f137
GS		 4556 if (CvLVALUE(cv)) {
4557 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4558 }
4559 else {
4560 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4561 }
4562 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4563 OpREFCNT_set(CvROOT(cv), 1);
4564 CvSTART(cv) = LINKLIST(CvROOT(cv));
4565 CvROOT(cv)->op_next = 0;
4566 peep(CvSTART(cv));
4567
4568 /* now that optimizer has done its work, adjust pad values */
54310121 4569 if (CvCLONE(cv)) {
3280af22
NIS		 4570 SV **namep = AvARRAY(PL_comppad_name);
4571 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4572 SV *namesv;
4573
7766f137 4574 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4575 continue;
4576 /*
4577 * The only things that a clonable function needs in its
4578 * pad are references to outer lexicals and anonymous subs.
4579 * The rest are created anew during cloning.
4580 */
4581 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4582 namesv != &PL_sv_undef &&
54310121 4583 (SvFAKE(namesv) ||
4584 *SvPVX(namesv) == '&')))
4585 {
3280af22
NIS		 4586 SvREFCNT_dec(PL_curpad[ix]);
4587 PL_curpad[ix] = Nullsv;
54310121 4588 }
4589 }
a0d0e21e 4590 }
54310121 4591 else {
4592 AV *av = newAV(); /* Will be @_ */
4593 av_extend(av, 0);
3280af22 4594 av_store(PL_comppad, 0, (SV*)av);
54310121 4595 AvFLAGS(av) = AVf_REIFY;
79072805 4596
3280af22 4597 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4598 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4599 continue;
3280af22
NIS		 4600 if (!SvPADMY(PL_curpad[ix]))
4601 SvPADTMP_on(PL_curpad[ix]);
54310121 4602 }
4603 }
79072805 4604
83ee9e09 4605 if (name || aname) {
44a8e56a 4606 char *s;
83ee9e09 4607 char *tname = (name ? name : aname);
44a8e56a 4608
3280af22 4609 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4610 SV *sv = NEWSV(0,0);
44a8e56a 4611 SV *tmpstr = sv_newmortal();
549bb64a 4612 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4613 CV *pcv;
44a8e56a 4614 HV *hv;
4615
ed094faf
GS		 4616 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4617 CopFILE(PL_curcop),
cc49e20b 4618 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4619 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4620 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4621 hv = GvHVn(db_postponed);
9607fc9c 4622 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4623 && (pcv = GvCV(db_postponed)))
4624 {
44a8e56a 4625 dSP;
924508f0 4626 PUSHMARK(SP);
44a8e56a 4627 XPUSHs(tmpstr);
4628 PUTBACK;
83ee9e09 4629 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4630 }
4631 }
79072805 4632
83ee9e09 4633 if ((s = strrchr(tname,':')))
28757baa 4634 s++;
4635 else
83ee9e09 4636 s = tname;
ed094faf 4637
7d30b5c4 4638 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4639 goto done;
4640
68dc0745 4641 if (strEQ(s, "BEGIN")) {
3280af22 4642 I32 oldscope = PL_scopestack_ix;
28757baa 4643 ENTER;
57843af0
GS		 4644 SAVECOPFILE(&PL_compiling);
4645 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4646 save_svref(&PL_rs);
4647 sv_setsv(PL_rs, PL_nrs);
28757baa 4648
3280af22
NIS		 4649 if (!PL_beginav)
4650 PL_beginav = newAV();
28757baa 4651 DEBUG_x( dump_sub(gv) );
ed094faf 4652 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4653 GvCV(gv) = 0;
3280af22 4654 call_list(oldscope, PL_beginav);
a6006777 4655
3280af22 4656 PL_curcop = &PL_compiling;
a0ed51b3 4657 PL_compiling.op_private = PL_hints;
28757baa 4658 LEAVE;
4659 }
3280af22
NIS		 4660 else if (strEQ(s, "END") && !PL_error_count) {
4661 if (!PL_endav)
4662 PL_endav = newAV();
ed094faf 4663 DEBUG_x( dump_sub(gv) );
3280af22 4664 av_unshift(PL_endav, 1);
ed094faf 4665 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4666 GvCV(gv) = 0;
4667 }
7d30b5c4
GS		 4668 else if (strEQ(s, "CHECK") && !PL_error_count) {
4669 if (!PL_checkav)
4670 PL_checkav = newAV();
ed094faf 4671 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4672 if (PL_main_start && ckWARN(WARN_VOID))
4673 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4674 av_unshift(PL_checkav, 1);
4675 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4676 GvCV(gv) = 0;
4677 }
3280af22
NIS		 4678 else if (strEQ(s, "INIT") && !PL_error_count) {
4679 if (!PL_initav)
4680 PL_initav = newAV();
ed094faf 4681 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4682 if (PL_main_start && ckWARN(WARN_VOID))
4683 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
3280af22 4684 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4685 GvCV(gv) = 0;
ae77835f 4686 }
79072805 4687 }
a6006777 4688
aa689395 4689 done:
3280af22 4690 PL_copline = NOLINE;
8990e307 4691 LEAVE_SCOPE(floor);
a0d0e21e 4692 return cv;
79072805
LW		 4693}
4694
b099ddc0 4695/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4696/*
4697=for apidoc newCONSTSUB
4698
4699Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4700eligible for inlining at compile-time.
4701
4702=cut
4703*/
4704
5476c433 4705void
864dbfa3 4706Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4707{
4708 dTHR;
5476c433 4709
11faa288
GS		 4710 ENTER;
4711 SAVECOPLINE(PL_curcop);
4712 SAVEHINTS();
4713
4714 CopLINE_set(PL_curcop, PL_copline);
3280af22 4715 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4716
4717 if (stash) {
4718 SAVESPTR(PL_curstash);
4719 SAVECOPSTASH(PL_curcop);
4720 PL_curstash = stash;
4721#ifdef USE_ITHREADS
4722 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4723#else
4724 CopSTASH(PL_curcop) = stash;
4725#endif
4726 }
5476c433 4727
09bef843 4728 newATTRSUB(
be24f278 4729 start_subparse(FALSE, 0),
5476c433 4730 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4731 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4732 Nullop,
5476c433
JD		 4733 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4734 );
4735
11faa288 4736 LEAVE;
5476c433
JD		 4737}
4738
954c1994
GS		 4739/*
4740=for apidoc U||newXS
4741
4742Used by C<xsubpp> to hook up XSUBs as Perl subs.
4743
4744=cut
4745*/
4746
57d3b86d 4747CV *
864dbfa3 4748Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4749{
11343788 4750 dTHR;
44a8e56a 4751 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4752 register CV *cv;
44a8e56a 4753
155aba94 4754 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4755 if (GvCVGEN(gv)) {
4756 /* just a cached method */
4757 SvREFCNT_dec(cv);
4758 cv = 0;
4759 }
4760 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4761 /* already defined (or promised) */
599cee73 4762 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4763 && HvNAME(GvSTASH(CvGV(cv)))
4764 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4765 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4766 if (PL_copline != NOLINE)
57843af0 4767 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4768 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4769 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4770 }
4771 SvREFCNT_dec(cv);
4772 cv = 0;
79072805 4773 }
79072805 4774 }
44a8e56a 4775
4776 if (cv) /* must reuse cv if autoloaded */
4777 cv_undef(cv);
a0d0e21e
LW		 4778 else {
4779 cv = (CV*)NEWSV(1105,0);
4780 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4781 if (name) {
4782 GvCV(gv) = cv;
4783 GvCVGEN(gv) = 0;
3280af22 4784 PL_sub_generation++;
44a8e56a 4785 }
a0d0e21e 4786 }
5196be3e 4787 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4788#ifdef USE_THREADS
12ca11f6 4789 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4790 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4791 CvOWNER(cv) = 0;
4792#endif /* USE_THREADS */
b195d487 4793 (void)gv_fetchfile(filename);
57843af0
GS		 4794 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4795 an external constant string */
a0d0e21e 4796 CvXSUB(cv) = subaddr;
44a8e56a 4797
28757baa 4798 if (name) {
4799 char *s = strrchr(name,':');
4800 if (s)
4801 s++;
4802 else
4803 s = name;
ed094faf 4804
7d30b5c4 4805 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4806 goto done;
4807
28757baa 4808 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4809 if (!PL_beginav)
4810 PL_beginav = newAV();
ed094faf 4811 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4812 GvCV(gv) = 0;
28757baa 4813 }
4814 else if (strEQ(s, "END")) {
3280af22
NIS		 4815 if (!PL_endav)
4816 PL_endav = newAV();
4817 av_unshift(PL_endav, 1);
ed094faf 4818 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4819 GvCV(gv) = 0;
28757baa 4820 }
7d30b5c4
GS		 4821 else if (strEQ(s, "CHECK")) {
4822 if (!PL_checkav)
4823 PL_checkav = newAV();
ddda08b7
GS		 4824 if (PL_main_start && ckWARN(WARN_VOID))
4825 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4826 av_unshift(PL_checkav, 1);
4827 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4828 GvCV(gv) = 0;
4829 }
7d07dbc2 4830 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4831 if (!PL_initav)
4832 PL_initav = newAV();
ddda08b7
GS		 4833 if (PL_main_start && ckWARN(WARN_VOID))
4834 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ed094faf 4835 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4836 GvCV(gv) = 0;
ae77835f 4837 }
28757baa 4838 }
8990e307 4839 else
a5f75d66 4840 CvANON_on(cv);
44a8e56a 4841
ed094faf 4842done:
a0d0e21e 4843 return cv;
79072805
LW		 4844}
4845
4846void
864dbfa3 4847Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4848{
11343788 4849 dTHR;
79072805
LW		 4850 register CV *cv;
4851 char *name;
4852 GV *gv;
a0d0e21e 4853 I32 ix;
2d8e6c8d 4854 STRLEN n_a;
79072805 4855
11343788 4856 if (o)
2d8e6c8d 4857 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4858 else
4859 name = "STDOUT";
85e6fe83 4860 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4861 GvMULTI_on(gv);
155aba94 4862 if ((cv = GvFORM(gv))) {
599cee73 4863 if (ckWARN(WARN_REDEFINE)) {
57843af0 4864 line_t oldline = CopLINE(PL_curcop);
79072805 4865
57843af0 4866 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4867 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4868 CopLINE_set(PL_curcop, oldline);
79072805 4869 }
8990e307 4870 SvREFCNT_dec(cv);
79072805 4871 }
3280af22 4872 cv = PL_compcv;
79072805 4873 GvFORM(gv) = cv;
44a8e56a 4874 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4875 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4876
3280af22
NIS		 4877 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4878 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4879 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4880 }
4881
79072805 4882 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4883 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4884 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4885 CvSTART(cv) = LINKLIST(CvROOT(cv));
4886 CvROOT(cv)->op_next = 0;
4887 peep(CvSTART(cv));
11343788 4888 op_free(o);
3280af22 4889 PL_copline = NOLINE;
8990e307 4890 LEAVE_SCOPE(floor);
79072805
LW		 4891}
4892
4893OP *
864dbfa3 4894Perl_newANONLIST(pTHX_ OP *o)
79072805 4895{
93a17b20 4896 return newUNOP(OP_REFGEN, 0,
11343788 4897 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4898}
4899
4900OP *
864dbfa3 4901Perl_newANONHASH(pTHX_ OP *o)
79072805 4902{
93a17b20 4903 return newUNOP(OP_REFGEN, 0,
11343788 4904 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4905}
4906
4907OP *
864dbfa3 4908Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4909{
09bef843
SB		 4910 return newANONATTRSUB(floor, proto, Nullop, block);
4911}
4912
4913OP *
4914Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4915{
a0d0e21e 4916 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4917 newSVOP(OP_ANONCODE, 0,
4918 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4919}
4920
4921OP *
864dbfa3 4922Perl_oopsAV(pTHX_ OP *o)
79072805 4923{
ed6116ce
LW		 4924 switch (o->op_type) {
4925 case OP_PADSV:
4926 o->op_type = OP_PADAV;
22c35a8c 4927 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4928 return ref(o, OP_RV2AV);
ed6116ce
LW		 4929
4930 case OP_RV2SV:
79072805 4931 o->op_type = OP_RV2AV;
22c35a8c 4932 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4933 ref(o, OP_RV2AV);
ed6116ce
LW		 4934 break;
4935
4936 default:
0453d815
PM		 4937 if (ckWARN_d(WARN_INTERNAL))
4938 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4939 break;
4940 }
79072805
LW		 4941 return o;
4942}
4943
4944OP *
864dbfa3 4945Perl_oopsHV(pTHX_ OP *o)
79072805 4946{
0453d815 4947 dTHR;
0453d815 4948
ed6116ce
LW		 4949 switch (o->op_type) {
4950 case OP_PADSV:
4951 case OP_PADAV:
4952 o->op_type = OP_PADHV;
22c35a8c 4953 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4954 return ref(o, OP_RV2HV);
ed6116ce
LW		 4955
4956 case OP_RV2SV:
4957 case OP_RV2AV:
79072805 4958 o->op_type = OP_RV2HV;
22c35a8c 4959 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4960 ref(o, OP_RV2HV);
ed6116ce
LW		 4961 break;
4962
4963 default:
0453d815
PM		 4964 if (ckWARN_d(WARN_INTERNAL))
4965 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4966 break;
4967 }
79072805
LW		 4968 return o;
4969}
4970
4971OP *
864dbfa3 4972Perl_newAVREF(pTHX_ OP *o)
79072805 4973{
ed6116ce
LW		 4974 if (o->op_type == OP_PADANY) {
4975 o->op_type = OP_PADAV;
22c35a8c 4976 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4977 return o;
ed6116ce 4978 }
79072805
LW		 4979 return newUNOP(OP_RV2AV, 0, scalar(o));
4980}
4981
4982OP *
864dbfa3 4983Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4984{
82092f1d 4985 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4986 return newUNOP(OP_NULL, 0, o);
748a9306 4987 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4988}
4989
4990OP *
864dbfa3 4991Perl_newHVREF(pTHX_ OP *o)
79072805 4992{
ed6116ce
LW		 4993 if (o->op_type == OP_PADANY) {
4994 o->op_type = OP_PADHV;
22c35a8c 4995 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4996 return o;
ed6116ce 4997 }
79072805
LW		 4998 return newUNOP(OP_RV2HV, 0, scalar(o));
4999}
5000
5001OP *
864dbfa3 5002Perl_oopsCV(pTHX_ OP *o)
79072805 5003{
cea2e8a9 5004 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5005 /* STUB */
5006 return o;
5007}
5008
5009OP *
864dbfa3 5010Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5011{
c07a80fd 5012 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5013}
5014
5015OP *
864dbfa3 5016Perl_newSVREF(pTHX_ OP *o)
79072805 5017{
ed6116ce
LW		 5018 if (o->op_type == OP_PADANY) {
5019 o->op_type = OP_PADSV;
22c35a8c 5020 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5021 return o;
ed6116ce 5022 }
224a4551
MB		 5023 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5024 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5025 return o;
224a4551 5026 }
79072805
LW		 5027 return newUNOP(OP_RV2SV, 0, scalar(o));
5028}
5029
5030/* Check routines. */
5031
5032OP *
cea2e8a9 5033Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5034{
178c6305
CS		 5035 PADOFFSET ix;
5036 SV* name;
5037
5038 name = NEWSV(1106,0);
5039 sv_upgrade(name, SVt_PVNV);
5040 sv_setpvn(name, "&", 1);
5041 SvIVX(name) = -1;
5042 SvNVX(name) = 1;
5dc0d613 5043 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5044 av_store(PL_comppad_name, ix, name);
5045 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5046 SvPADMY_on(cSVOPo->op_sv);
5047 cSVOPo->op_sv = Nullsv;
5048 cSVOPo->op_targ = ix;
5049 return o;
5f05dabc 5050}
5051
5052OP *
cea2e8a9 5053Perl_ck_bitop(pTHX_ OP *o)
55497cff 5054{
3280af22 5055 o->op_private = PL_hints;
5dc0d613 5056 return o;
55497cff 5057}
5058
5059OP *
cea2e8a9 5060Perl_ck_concat(pTHX_ OP *o)
79072805 5061{
11343788
MB		 5062 if (cUNOPo->op_first->op_type == OP_CONCAT)
5063 o->op_flags |= OPf_STACKED;
5064 return o;
79072805
LW		 5065}
5066
5067OP *
cea2e8a9 5068Perl_ck_spair(pTHX_ OP *o)
79072805 5069{
11343788 5070 if (o->op_flags & OPf_KIDS) {
79072805 5071 OP* newop;
a0d0e21e 5072 OP* kid;
5dc0d613
MB		 5073 OPCODE type = o->op_type;
5074 o = modkids(ck_fun(o), type);
11343788 5075 kid = cUNOPo->op_first;
a0d0e21e
LW		 5076 newop = kUNOP->op_first->op_sibling;
5077 if (newop &&
5078 (newop->op_sibling ||
22c35a8c 5079 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5080 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5081 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5082
11343788 5083 return o;
a0d0e21e
LW		 5084 }
5085 op_free(kUNOP->op_first);
5086 kUNOP->op_first = newop;
5087 }
22c35a8c 5088 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5089 return ck_fun(o);
a0d0e21e
LW		 5090}
5091
5092OP *
cea2e8a9 5093Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5094{
11343788 5095 o = ck_fun(o);
5dc0d613 5096 o->op_private = 0;
11343788
MB		 5097 if (o->op_flags & OPf_KIDS) {
5098 OP *kid = cUNOPo->op_first;
01020589
GS		 5099 switch (kid->op_type) {
5100 case OP_ASLICE:
5101 o->op_flags |= OPf_SPECIAL;
5102 /* FALL THROUGH */
5103 case OP_HSLICE:
5dc0d613 5104 o->op_private |= OPpSLICE;
01020589
GS		 5105 break;
5106 case OP_AELEM:
5107 o->op_flags |= OPf_SPECIAL;
5108 /* FALL THROUGH */
5109 case OP_HELEM:
5110 break;
5111 default:
5112 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5113 PL_op_desc[o->op_type]);
01020589 5114 }
a0d0e21e 5115 null(kid);
79072805 5116 }
11343788 5117 return o;
79072805
LW		 5118}
5119
5120OP *
cea2e8a9 5121Perl_ck_eof(pTHX_ OP *o)
79072805 5122{
11343788 5123 I32 type = o->op_type;
79072805 5124
11343788
MB		 5125 if (o->op_flags & OPf_KIDS) {
5126 if (cLISTOPo->op_first->op_type == OP_STUB) {
5127 op_free(o);
5128 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5129 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5130 }
11343788 5131 return ck_fun(o);
79072805 5132 }
11343788 5133 return o;
79072805
LW		 5134}
5135
5136OP *
cea2e8a9 5137Perl_ck_eval(pTHX_ OP *o)
79072805 5138{
3280af22 5139 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5140 if (o->op_flags & OPf_KIDS) {
5141 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5142
93a17b20 5143 if (!kid) {
11343788
MB		 5144 o->op_flags &= ~OPf_KIDS;
5145 null(o);
79072805
LW		 5146 }
5147 else if (kid->op_type == OP_LINESEQ) {
5148 LOGOP *enter;
5149
11343788
MB		 5150 kid->op_next = o->op_next;
5151 cUNOPo->op_first = 0;
5152 op_free(o);
79072805 5153
b7dc083c 5154 NewOp(1101, enter, 1, LOGOP);
79072805 5155 enter->op_type = OP_ENTERTRY;
22c35a8c 5156 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5157 enter->op_private = 0;
5158
5159 /* establish postfix order */
5160 enter->op_next = (OP*)enter;
5161
11343788
MB		 5162 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5163 o->op_type = OP_LEAVETRY;
22c35a8c 5164 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5165 enter->op_other = o;
5166 return o;
79072805 5167 }
c7cc6f1c 5168 else
473986ff 5169 scalar((OP*)kid);
79072805
LW		 5170 }
5171 else {
11343788 5172 op_free(o);
54b9620d 5173 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5174 }
3280af22 5175 o->op_targ = (PADOFFSET)PL_hints;
11343788 5176 return o;
79072805
LW		 5177}
5178
5179OP *
d98f61e7
GS		 5180Perl_ck_exit(pTHX_ OP *o)
5181{
5182#ifdef VMS
5183 HV *table = GvHV(PL_hintgv);
5184 if (table) {
5185 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5186 if (svp && *svp && SvTRUE(*svp))
5187 o->op_private |= OPpEXIT_VMSISH;
5188 }
5189#endif
5190 return ck_fun(o);
5191}
5192
5193OP *
cea2e8a9 5194Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5195{
5196 OP *kid;
11343788
MB		 5197 if (o->op_flags & OPf_STACKED) {
5198 o = ck_fun(o);
5199 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5200 if (kid->op_type == OP_RV2GV)
5201 null(kid);
79072805 5202 }
463ee0b2 5203 else
11343788
MB		 5204 o = listkids(o);
5205 return o;
79072805
LW		 5206}
5207
5208OP *
cea2e8a9 5209Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5210{
5196be3e
MB		 5211 o = ck_fun(o);
5212 if (o->op_flags & OPf_KIDS) {
5213 OP *kid = cUNOPo->op_first;
afebc493
GS		 5214 if (kid->op_type == OP_ENTERSUB) {
5215 (void) ref(kid, o->op_type);
5216 if (kid->op_type != OP_RV2CV && !PL_error_count)
5217 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5218 PL_op_desc[o->op_type]);
5219 o->op_private |= OPpEXISTS_SUB;
5220 }
5221 else if (kid->op_type == OP_AELEM)
01020589
GS		 5222 o->op_flags |= OPf_SPECIAL;
5223 else if (kid->op_type != OP_HELEM)
5224 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5225 PL_op_desc[o->op_type]);
5f05dabc 5226 null(kid);
5227 }
5196be3e 5228 return o;
5f05dabc 5229}
5230
22c35a8c 5231#if 0
5f05dabc 5232OP *
cea2e8a9 5233Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5234{
5235 o = fold_constants(o);
5236 if (o->op_type == OP_CONST)
5237 o->op_type = OP_GV;
5238 return o;
5239}
22c35a8c 5240#endif
79072805
LW		 5241
5242OP *
cea2e8a9 5243Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5244{
11343788
MB		 5245 dTHR;
5246 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5247
3280af22 5248 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5249 if (kid->op_type == OP_CONST) {
44a8e56a 5250 char *name;
5251 int iscv;
5252 GV *gv;
779c5bc9 5253 SV *kidsv = kid->op_sv;
2d8e6c8d 5254 STRLEN n_a;
44a8e56a 5255
779c5bc9
GS		 5256 /* Is it a constant from cv_const_sv()? */
5257 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5258 SV *rsv = SvRV(kidsv);
5259 int svtype = SvTYPE(rsv);
5260 char *badtype = Nullch;
5261
5262 switch (o->op_type) {
5263 case OP_RV2SV:
5264 if (svtype > SVt_PVMG)
5265 badtype = "a SCALAR";
5266 break;
5267 case OP_RV2AV:
5268 if (svtype != SVt_PVAV)
5269 badtype = "an ARRAY";
5270 break;
5271 case OP_RV2HV:
5272 if (svtype != SVt_PVHV) {
5273 if (svtype == SVt_PVAV) { /* pseudohash? */
5274 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5275 if (ksv && SvROK(*ksv)
5276 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5277 {
5278 break;
5279 }
5280 }
5281 badtype = "a HASH";
5282 }
5283 break;
5284 case OP_RV2CV:
5285 if (svtype != SVt_PVCV)
5286 badtype = "a CODE";
5287 break;
5288 }
5289 if (badtype)
cea2e8a9 5290 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5291 return o;
5292 }
2d8e6c8d 5293 name = SvPV(kidsv, n_a);
3280af22 5294 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5295 char *badthing = Nullch;
5dc0d613 5296 switch (o->op_type) {
44a8e56a 5297 case OP_RV2SV:
5298 badthing = "a SCALAR";
5299 break;
5300 case OP_RV2AV:
5301 badthing = "an ARRAY";
5302 break;
5303 case OP_RV2HV:
5304 badthing = "a HASH";
5305 break;
5306 }
5307 if (badthing)
cea2e8a9 5308 Perl_croak(aTHX_
44a8e56a 5309 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5310 name, badthing);
5311 }
93233ece
CS		 5312 /*
5313 * This is a little tricky. We only want to add the symbol if we
5314 * didn't add it in the lexer. Otherwise we get duplicate strict
5315 * warnings. But if we didn't add it in the lexer, we must at
5316 * least pretend like we wanted to add it even if it existed before,
5317 * or we get possible typo warnings. OPpCONST_ENTERED says
5318 * whether the lexer already added THIS instance of this symbol.
5319 */
5196be3e 5320 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5321 do {
44a8e56a 5322 gv = gv_fetchpv(name,
748a9306 5323 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5324 iscv
5325 ? SVt_PVCV
11343788 5326 : o->op_type == OP_RV2SV
a0d0e21e 5327 ? SVt_PV
11343788 5328 : o->op_type == OP_RV2AV
a0d0e21e 5329 ? SVt_PVAV
11343788 5330 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5331 ? SVt_PVHV
5332 : SVt_PVGV);
93233ece
CS		 5333 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5334 if (gv) {
5335 kid->op_type = OP_GV;
5336 SvREFCNT_dec(kid->op_sv);
350de78d 5337#ifdef USE_ITHREADS
638eceb6 5338 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5339 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5340 GvIN_PAD_on(gv);
350de78d
GS		 5341 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5342#else
93233ece 5343 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5344#endif
76cd736e 5345 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5346 }
79072805 5347 }
11343788 5348 return o;
79072805
LW		 5349}
5350
5351OP *
cea2e8a9 5352Perl_ck_ftst(pTHX_ OP *o)
79072805 5353{
11343788
MB		 5354 dTHR;
5355 I32 type = o->op_type;
79072805 5356
d0dca557
JD		 5357 if (o->op_flags & OPf_REF) {
5358 /* nothing */
5359 }
5360 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5361 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5362
5363 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5364 STRLEN n_a;
a0d0e21e 5365 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5366 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5367 op_free(o);
d0dca557 5368 o = newop;
79072805
LW		 5369 }
5370 }
5371 else {
11343788 5372 op_free(o);
79072805 5373 if (type == OP_FTTTY)
d0dca557 5374 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5375 SVt_PVIO));
79072805 5376 else
d0dca557 5377 o = newUNOP(type, 0, newDEFSVOP());
79072805 5378 }
d0dca557
JD		 5379#ifdef USE_LOCALE
5380 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5381 o->op_private = 0;
5382 if (PL_hints & HINT_LOCALE)
5383 o->op_private |= OPpLOCALE;
5384 }
5385#endif
11343788 5386 return o;
79072805
LW		 5387}
5388
5389OP *
cea2e8a9 5390Perl_ck_fun(pTHX_ OP *o)
79072805 5391{
11343788 5392 dTHR;
79072805
LW		 5393 register OP *kid;
5394 OP **tokid;
5395 OP *sibl;
5396 I32 numargs = 0;
11343788 5397 int type = o->op_type;
22c35a8c 5398 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5399
11343788 5400 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5401 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5402 oa &= ~OA_OPTIONAL;
5403 else
11343788 5404 return no_fh_allowed(o);
79072805
LW		 5405 }
5406
11343788 5407 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5408 STRLEN n_a;
11343788
MB		 5409 tokid = &cLISTOPo->op_first;
5410 kid = cLISTOPo->op_first;
8990e307 5411 if (kid->op_type == OP_PUSHMARK ||
155aba94 5412 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5413 {
79072805
LW		 5414 tokid = &kid->op_sibling;
5415 kid = kid->op_sibling;
5416 }
22c35a8c 5417 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5418 *tokid = kid = newDEFSVOP();
79072805
LW		 5419
5420 while (oa && kid) {
5421 numargs++;
5422 sibl = kid->op_sibling;
5423 switch (oa & 7) {
5424 case OA_SCALAR:
62c18ce2
GS		 5425 /* list seen where single (scalar) arg expected? */
5426 if (numargs == 1 && !(oa >> 4)
5427 && kid->op_type == OP_LIST && type != OP_SCALAR)
5428 {
5429 return too_many_arguments(o,PL_op_desc[type]);
5430 }
79072805
LW		 5431 scalar(kid);
5432 break;
5433 case OA_LIST:
5434 if (oa < 16) {
5435 kid = 0;
5436 continue;
5437 }
5438 else
5439 list(kid);
5440 break;
5441 case OA_AVREF:
5442 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5443 (kid->op_private & OPpCONST_BARE))
5444 {
2d8e6c8d 5445 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5446 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5447 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5448 if (ckWARN(WARN_DEPRECATED))
5449 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5450 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5451 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5452 op_free(kid);
5453 kid = newop;
5454 kid->op_sibling = sibl;
5455 *tokid = kid;
5456 }
8990e307 5457 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5458 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5459 mod(kid, type);
79072805
LW		 5460 break;
5461 case OA_HVREF:
5462 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5463 (kid->op_private & OPpCONST_BARE))
5464 {
2d8e6c8d 5465 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5466 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5467 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5468 if (ckWARN(WARN_DEPRECATED))
5469 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5470 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5471 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5472 op_free(kid);
5473 kid = newop;
5474 kid->op_sibling = sibl;
5475 *tokid = kid;
5476 }
8990e307 5477 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5478 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5479 mod(kid, type);
79072805
LW		 5480 break;
5481 case OA_CVREF:
5482 {
a0d0e21e 5483 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5484 kid->op_sibling = 0;
5485 linklist(kid);
5486 newop->op_next = newop;
5487 kid = newop;
5488 kid->op_sibling = sibl;
5489 *tokid = kid;
5490 }
5491 break;
5492 case OA_FILEREF:
c340be78 5493 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5494 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5495 (kid->op_private & OPpCONST_BARE))
5496 {
79072805 5497 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5498 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5499 SVt_PVIO) );
79072805
LW		 5500 op_free(kid);
5501 kid = newop;
5502 }
1ea32a52
GS		 5503 else if (kid->op_type == OP_READLINE) {
5504 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5505 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5506 }
79072805 5507 else {
35cd451c 5508 I32 flags = OPf_SPECIAL;
a6c40364 5509 I32 priv = 0;
2c8ac474
GS		 5510 PADOFFSET targ = 0;
5511
35cd451c 5512 /* is this op a FH constructor? */
853846ea 5513 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5514 char *name = Nullch;
5515 STRLEN len;
5516
5517 flags = 0;
5518 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5519 * need to "prove" flag does not mean something
5520 * else already - NI-S 1999/05/07
2c8ac474
GS		 5521 */
5522 priv = OPpDEREF;
5523 if (kid->op_type == OP_PADSV) {
5524 SV **namep = av_fetch(PL_comppad_name,
5525 kid->op_targ, 4);
5526 if (namep && *namep)
5527 name = SvPV(*namep, len);
5528 }
5529 else if (kid->op_type == OP_RV2SV
5530 && kUNOP->op_first->op_type == OP_GV)
5531 {
5532 GV *gv = cGVOPx_gv(kUNOP->op_first);
5533 name = GvNAME(gv);
5534 len = GvNAMELEN(gv);
5535 }
afd1915d
GS		 5536 else if (kid->op_type == OP_AELEM
5537 || kid->op_type == OP_HELEM)
5538 {
5539 name = "__ANONIO__";
5540 len = 10;
5541 mod(kid,type);
5542 }
2c8ac474
GS		 5543 if (name) {
5544 SV *namesv;
5545 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5546 namesv = PL_curpad[targ];
155aba94 5547 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5548 if (*name != '$')
5549 sv_setpvn(namesv, "$", 1);
5550 sv_catpvn(namesv, name, len);
5551 }
853846ea 5552 }
79072805 5553 kid->op_sibling = 0;
35cd451c 5554 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5555 kid->op_targ = targ;
5556 kid->op_private |= priv;
79072805
LW		 5557 }
5558 kid->op_sibling = sibl;
5559 *tokid = kid;
5560 }
5561 scalar(kid);
5562 break;
5563 case OA_SCALARREF:
a0d0e21e 5564 mod(scalar(kid), type);
79072805
LW		 5565 break;
5566 }
5567 oa >>= 4;
5568 tokid = &kid->op_sibling;
5569 kid = kid->op_sibling;
5570 }
11343788 5571 o->op_private |= numargs;
79072805 5572 if (kid)
22c35a8c 5573 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5574 listkids(o);
79072805 5575 }
22c35a8c 5576 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5577 op_free(o);
54b9620d 5578 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5579 }
5580
79072805
LW		 5581 if (oa) {
5582 while (oa & OA_OPTIONAL)
5583 oa >>= 4;
5584 if (oa && oa != OA_LIST)
22c35a8c 5585 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5586 }
11343788 5587 return o;
79072805
LW		 5588}
5589
5590OP *
cea2e8a9 5591Perl_ck_glob(pTHX_ OP *o)
79072805 5592{
fb73857a 5593 GV *gv;
5594
649da076 5595 o = ck_fun(o);
1f2bfc8a 5596 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5597 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5598
5599 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5600 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5601
52bb0670 5602#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5603 /* XXX this can be tightened up and made more failsafe. */
5604 if (!gv) {
72b16652 5605 ENTER;
e4783991
GS		 5606 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5607 /* null-terminated import list */
5608 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5609 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5610 LEAVE;
5611 }
52bb0670 5612#endif /* PERL_EXTERNAL_GLOB */
72b16652 5613
b1cb66bf 5614 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5615 append_elem(OP_GLOB, o,
80252599 5616 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5617 o->op_type = OP_LIST;
22c35a8c 5618 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5619 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5620 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5621 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5622 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5623 scalar(newUNOP(OP_RV2CV, 0,
5624 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5625 o = newUNOP(OP_NULL, 0, ck_subr(o));
5626 o->op_targ = OP_GLOB; /* hint at what it used to be */
5627 return o;
b1cb66bf 5628 }
5629 gv = newGVgen("main");
a0d0e21e 5630 gv_IOadd(gv);
11343788
MB		 5631 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5632 scalarkids(o);
649da076 5633 return o;
79072805
LW		 5634}
5635
5636OP *
cea2e8a9 5637Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5638{
5639 LOGOP *gwop;
5640 OP *kid;
11343788 5641 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5642
22c35a8c 5643 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5644 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5645
11343788 5646 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5647 OP* k;
11343788
MB		 5648 o = ck_sort(o);
5649 kid = cLISTOPo->op_first->op_sibling;
5650 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5651 kid = k;
5652 }
5653 kid->op_next = (OP*)gwop;
11343788 5654 o->op_flags &= ~OPf_STACKED;
93a17b20 5655 }
11343788 5656 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5657 if (type == OP_MAPWHILE)
5658 list(kid);
5659 else
5660 scalar(kid);
11343788 5661 o = ck_fun(o);
3280af22 5662 if (PL_error_count)
11343788 5663 return o;
aeea060c 5664 kid = cLISTOPo->op_first->op_sibling;
79072805 5665 if (kid->op_type != OP_NULL)
cea2e8a9 5666 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5667 kid = kUNOP->op_first;
5668
a0d0e21e 5669 gwop->op_type = type;
22c35a8c 5670 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5671 gwop->op_first = listkids(o);
79072805
LW		 5672 gwop->op_flags |= OPf_KIDS;
5673 gwop->op_private = 1;
5674 gwop->op_other = LINKLIST(kid);
a0d0e21e 5675 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5676 kid->op_next = (OP*)gwop;
5677
11343788 5678 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5679 if (!kid || !kid->op_sibling)
22c35a8c 5680 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5681 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5682 mod(kid, OP_GREPSTART);
5683
79072805
LW		 5684 return (OP*)gwop;
5685}
5686
5687OP *
cea2e8a9 5688Perl_ck_index(pTHX_ OP *o)
79072805 5689{
11343788
MB		 5690 if (o->op_flags & OPf_KIDS) {
5691 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5692 if (kid)
5693 kid = kid->op_sibling; /* get past "big" */
79072805 5694 if (kid && kid->op_type == OP_CONST)
2779dcf1 5695 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5696 }
11343788 5697 return ck_fun(o);
79072805
LW		 5698}
5699
5700OP *
cea2e8a9 5701Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5702{
5703 /* XXX length optimization goes here */
11343788 5704 return ck_fun(o);
79072805
LW		 5705}
5706
5707OP *
cea2e8a9 5708Perl_ck_lfun(pTHX_ OP *o)
79072805 5709{
5dc0d613
MB		 5710 OPCODE type = o->op_type;
5711 return modkids(ck_fun(o), type);
79072805
LW		 5712}
5713
5714OP *
cea2e8a9 5715Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5716{
20ce7b12 5717 dTHR;
d0334bed
GS		 5718 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5719 switch (cUNOPo->op_first->op_type) {
5720 case OP_RV2AV:
7e291ef1 5721 break; /* Globals via GV can be undef */
d0334bed
GS		 5722 case OP_PADAV:
5723 case OP_AASSIGN: /* Is this a good idea? */
5724 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5725 "defined(@array) is deprecated");
d0334bed 5726 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5727 "\t(Maybe you should just omit the defined()?)\n");
69794302 5728 break;
d0334bed 5729 case OP_RV2HV:
7e291ef1 5730 break; /* Globals via GV can be undef */
d0334bed
GS		 5731 case OP_PADHV:
5732 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5733 "defined(%%hash) is deprecated");
d0334bed 5734 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5735 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5736 break;
5737 default:
5738 /* no warning */
5739 break;
5740 }
69794302
MJD		 5741 }
5742 return ck_rfun(o);
5743}
5744
5745OP *
cea2e8a9 5746Perl_ck_rfun(pTHX_ OP *o)
8990e307 5747{
5dc0d613
MB		 5748 OPCODE type = o->op_type;
5749 return refkids(ck_fun(o), type);
8990e307
LW		 5750}
5751
5752OP *
cea2e8a9 5753Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5754{
5755 register OP *kid;
aeea060c 5756
11343788 5757 kid = cLISTOPo->op_first;
79072805 5758 if (!kid) {
11343788
MB		 5759 o = force_list(o);
5760 kid = cLISTOPo->op_first;
79072805
LW		 5761 }
5762 if (kid->op_type == OP_PUSHMARK)
5763 kid = kid->op_sibling;
11343788 5764 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5765 kid = kid->op_sibling;
5766 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5767 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5768 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5769 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5770 cLISTOPo->op_first->op_sibling = kid;
5771 cLISTOPo->op_last = kid;
79072805
LW		 5772 kid = kid->op_sibling;
5773 }
5774 }
5775
5776 if (!kid)
54b9620d 5777 append_elem(o->op_type, o, newDEFSVOP());
79072805 5778
5dc0d613 5779 o = listkids(o);
bbce6d69 5780
5dc0d613 5781 o->op_private = 0;
36477c24 5782#ifdef USE_LOCALE
3280af22 5783 if (PL_hints & HINT_LOCALE)
5dc0d613 5784 o->op_private |= OPpLOCALE;
bbce6d69 5785#endif
5786
5dc0d613 5787 return o;
bbce6d69 5788}
5789
5790OP *
cea2e8a9 5791Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5792{
5dc0d613 5793 o = ck_fun(o);
bbce6d69 5794
5dc0d613 5795 o->op_private = 0;
36477c24 5796#ifdef USE_LOCALE
3280af22 5797 if (PL_hints & HINT_LOCALE)
5dc0d613 5798 o->op_private |= OPpLOCALE;
bbce6d69 5799#endif
5800
5dc0d613 5801 return o;
bbce6d69 5802}
5803
5804OP *
b162f9ea
IZ		 5805Perl_ck_sassign(pTHX_ OP *o)
5806{
5807 OP *kid = cLISTOPo->op_first;
5808 /* has a disposable target? */
5809 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5810 && !(kid->op_flags & OPf_STACKED)
5811 /* Cannot steal the second time! */
5812 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5813 {
5814 OP *kkid = kid->op_sibling;
5815
5816 /* Can just relocate the target. */
2c2d71f5
JH		 5817 if (kkid && kkid->op_type == OP_PADSV
5818 && !(kkid->op_private & OPpLVAL_INTRO))
5819 {
b162f9ea 5820 kid->op_targ = kkid->op_targ;
743e66e6 5821 kkid->op_targ = 0;
b162f9ea
IZ		 5822 /* Now we do not need PADSV and SASSIGN. */
5823 kid->op_sibling = o->op_sibling; /* NULL */
5824 cLISTOPo->op_first = NULL;
5825 op_free(o);
5826 op_free(kkid);
5827 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5828 return kid;
5829 }
5830 }
5831 return o;
5832}
5833
5834OP *
cea2e8a9 5835Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5836{
5dc0d613 5837 o->op_private = 0;
36477c24 5838#ifdef USE_LOCALE
3280af22 5839 if (PL_hints & HINT_LOCALE)
5dc0d613 5840 o->op_private |= OPpLOCALE;
bbce6d69 5841#endif
36477c24 5842
5dc0d613 5843 return o;
79072805
LW		 5844}
5845
5846OP *
cea2e8a9 5847Perl_ck_match(pTHX_ OP *o)
79072805 5848{
5dc0d613 5849 o->op_private |= OPpRUNTIME;
11343788 5850 return o;
79072805
LW		 5851}
5852
5853OP *
f5d5a27c
CS		 5854Perl_ck_method(pTHX_ OP *o)
5855{
5856 OP *kid = cUNOPo->op_first;
5857 if (kid->op_type == OP_CONST) {
5858 SV* sv = kSVOP->op_sv;
5859 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5860 OP *cmop;
155aba94
GS		 5861 (void)SvUPGRADE(sv, SVt_PVIV);
5862 (void)SvIOK_on(sv);
f5d5a27c
CS		 5863 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5864 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5865 kSVOP->op_sv = Nullsv;
5866 op_free(o);
5867 return cmop;
5868 }
5869 }
5870 return o;
5871}
5872
5873OP *
cea2e8a9 5874Perl_ck_null(pTHX_ OP *o)
79072805 5875{
11343788 5876 return o;
79072805
LW		 5877}
5878
5879OP *
16fe6d59
GS		 5880Perl_ck_open(pTHX_ OP *o)
5881{
5882 HV *table = GvHV(PL_hintgv);
5883 if (table) {
5884 SV **svp;
5885 I32 mode;
5886 svp = hv_fetch(table, "open_IN", 7, FALSE);
5887 if (svp && *svp) {
5888 mode = mode_from_discipline(*svp);
5889 if (mode & O_BINARY)
5890 o->op_private |= OPpOPEN_IN_RAW;
5891 else if (mode & O_TEXT)
5892 o->op_private |= OPpOPEN_IN_CRLF;
5893 }
5894
5895 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5896 if (svp && *svp) {
5897 mode = mode_from_discipline(*svp);
5898 if (mode & O_BINARY)
5899 o->op_private |= OPpOPEN_OUT_RAW;
5900 else if (mode & O_TEXT)
5901 o->op_private |= OPpOPEN_OUT_CRLF;
5902 }
5903 }
5904 if (o->op_type == OP_BACKTICK)
5905 return o;
5906 return ck_fun(o);
5907}
5908
5909OP *
cea2e8a9 5910Perl_ck_repeat(pTHX_ OP *o)
79072805 5911{
11343788
MB		 5912 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5913 o->op_private |= OPpREPEAT_DOLIST;
5914 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5915 }
5916 else
11343788
MB		 5917 scalar(o);
5918 return o;
79072805
LW		 5919}
5920
5921OP *
cea2e8a9 5922Perl_ck_require(pTHX_ OP *o)
8990e307 5923{
11343788
MB		 5924 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5925 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5926
5927 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5928 char *s;
a0d0e21e
LW		 5929 for (s = SvPVX(kid->op_sv); *s; s++) {
5930 if (*s == ':' && s[1] == ':') {
5931 *s = '/';
1aef975c 5932 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5933 --SvCUR(kid->op_sv);
5934 }
8990e307 5935 }
ce3b816e
GS		 5936 if (SvREADONLY(kid->op_sv)) {
5937 SvREADONLY_off(kid->op_sv);
5938 sv_catpvn(kid->op_sv, ".pm", 3);
5939 SvREADONLY_on(kid->op_sv);
5940 }
5941 else
5942 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5943 }
5944 }
11343788 5945 return ck_fun(o);
8990e307
LW		 5946}
5947
22c35a8c 5948#if 0
8990e307 5949OP *
cea2e8a9 5950Perl_ck_retarget(pTHX_ OP *o)
79072805 5951{
cea2e8a9 5952 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5953 /* STUB */
11343788 5954 return o;
79072805 5955}
22c35a8c 5956#endif
79072805
LW		 5957
5958OP *
cea2e8a9 5959Perl_ck_select(pTHX_ OP *o)
79072805 5960{
c07a80fd 5961 OP* kid;
11343788
MB		 5962 if (o->op_flags & OPf_KIDS) {
5963 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5964 if (kid && kid->op_sibling) {
11343788 5965 o->op_type = OP_SSELECT;
22c35a8c 5966 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5967 o = ck_fun(o);
5968 return fold_constants(o);
79072805
LW		 5969 }
5970 }
11343788
MB		 5971 o = ck_fun(o);
5972 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5973 if (kid && kid->op_type == OP_RV2GV)
5974 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5975 return o;
79072805
LW		 5976}
5977
5978OP *
cea2e8a9 5979Perl_ck_shift(pTHX_ OP *o)
79072805 5980{
11343788 5981 I32 type = o->op_type;
79072805 5982
11343788 5983 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5984 OP *argop;
5985
11343788 5986 op_free(o);
6d4ff0d2 5987#ifdef USE_THREADS
533c011a 5988 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5989 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5990 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5991 }
5992 else {
5993 argop = newUNOP(OP_RV2AV, 0,
5994 scalar(newGVOP(OP_GV, 0,
5995 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5996 }
5997#else
5998 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5999 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6000 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6001#endif /* USE_THREADS */
6002 return newUNOP(type, 0, scalar(argop));
79072805 6003 }
11343788 6004 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6005}
6006
6007OP *
cea2e8a9 6008Perl_ck_sort(pTHX_ OP *o)
79072805 6009{
8e3f9bdf 6010 OP *firstkid;
5dc0d613 6011 o->op_private = 0;
36477c24 6012#ifdef USE_LOCALE
3280af22 6013 if (PL_hints & HINT_LOCALE)
5dc0d613 6014 o->op_private |= OPpLOCALE;
bbce6d69 6015#endif
6016
9ea6e965 6017 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6018 simplify_sort(o);
8e3f9bdf
GS		 6019 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6020 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6021 OP *k;
8e3f9bdf 6022 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6023
463ee0b2 6024 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6025 linklist(kid);
463ee0b2
LW		 6026 if (kid->op_type == OP_SCOPE) {
6027 k = kid->op_next;
6028 kid->op_next = 0;
79072805 6029 }
463ee0b2 6030 else if (kid->op_type == OP_LEAVE) {
11343788 6031 if (o->op_type == OP_SORT) {
748a9306
LW		 6032 null(kid); /* wipe out leave */
6033 kid->op_next = kid;
463ee0b2 6034
748a9306
LW		 6035 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6036 if (k->op_next == kid)
6037 k->op_next = 0;
71a29c3c
GS		 6038 /* don't descend into loops */
6039 else if (k->op_type == OP_ENTERLOOP
6040 || k->op_type == OP_ENTERITER)
6041 {
6042 k = cLOOPx(k)->op_lastop;
6043 }
748a9306 6044 }
463ee0b2 6045 }
748a9306
LW		 6046 else
6047 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6048 k = kLISTOP->op_first;
463ee0b2 6049 }
a0d0e21e
LW		 6050 peep(k);
6051
8e3f9bdf
GS		 6052 kid = firstkid;
6053 if (o->op_type == OP_SORT) {
6054 /* provide scalar context for comparison function/block */
6055 kid = scalar(kid);
a0d0e21e 6056 kid->op_next = kid;
8e3f9bdf 6057 }
a0d0e21e
LW		 6058 else
6059 kid->op_next = k;
11343788 6060 o->op_flags |= OPf_SPECIAL;
79072805 6061 }
c6e96bcb 6062 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6063 null(firstkid);
6064
6065 firstkid = firstkid->op_sibling;
79072805 6066 }
bbce6d69 6067
8e3f9bdf
GS		 6068 /* provide list context for arguments */
6069 if (o->op_type == OP_SORT)
6070 list(firstkid);
6071
11343788 6072 return o;
79072805 6073}
bda4119b
GS		 6074
6075STATIC void
cea2e8a9 6076S_simplify_sort(pTHX_ OP *o)
9c007264 6077{
51a19bc0 6078 dTHR;
9c007264
JH		 6079 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6080 OP *k;
6081 int reversed;
350de78d 6082 GV *gv;
9c007264
JH		 6083 if (!(o->op_flags & OPf_STACKED))
6084 return;
9ea6e965
GS		 6085 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6086 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6087 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6088 if (kid->op_type != OP_SCOPE)
6089 return;
6090 kid = kLISTOP->op_last; /* get past scope */
6091 switch(kid->op_type) {
6092 case OP_NCMP:
6093 case OP_I_NCMP:
6094 case OP_SCMP:
6095 break;
6096 default:
6097 return;
6098 }
6099 k = kid; /* remember this node*/
6100 if (kBINOP->op_first->op_type != OP_RV2SV)
6101 return;
6102 kid = kBINOP->op_first; /* get past cmp */
6103 if (kUNOP->op_first->op_type != OP_GV)
6104 return;
6105 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6106 gv = kGVOP_gv;
350de78d 6107 if (GvSTASH(gv) != PL_curstash)
9c007264 6108 return;
350de78d 6109 if (strEQ(GvNAME(gv), "a"))
9c007264 6110 reversed = 0;
0f79a09d 6111 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6112 reversed = 1;
6113 else
6114 return;
6115 kid = k; /* back to cmp */
6116 if (kBINOP->op_last->op_type != OP_RV2SV)
6117 return;
6118 kid = kBINOP->op_last; /* down to 2nd arg */
6119 if (kUNOP->op_first->op_type != OP_GV)
6120 return;
6121 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6122 gv = kGVOP_gv;
350de78d 6123 if (GvSTASH(gv) != PL_curstash
9c007264 6124 || ( reversed
350de78d
GS		 6125 ? strNE(GvNAME(gv), "a")
6126 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6127 return;
6128 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6129 if (reversed)
6130 o->op_private |= OPpSORT_REVERSE;
6131 if (k->op_type == OP_NCMP)
6132 o->op_private |= OPpSORT_NUMERIC;
6133 if (k->op_type == OP_I_NCMP)
6134 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6135 kid = cLISTOPo->op_first->op_sibling;
6136 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6137 op_free(kid); /* then delete it */
6138 cLISTOPo->op_children--;
9c007264 6139}
79072805
LW		 6140
6141OP *
cea2e8a9 6142Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6143{
6144 register OP *kid;
aeea060c 6145
11343788
MB		 6146 if (o->op_flags & OPf_STACKED)
6147 return no_fh_allowed(o);
79072805 6148
11343788 6149 kid = cLISTOPo->op_first;
8990e307 6150 if (kid->op_type != OP_NULL)
cea2e8a9 6151 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6152 kid = kid->op_sibling;
11343788
MB		 6153 op_free(cLISTOPo->op_first);
6154 cLISTOPo->op_first = kid;
85e6fe83 6155 if (!kid) {
79cb57f6 6156 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6157 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6158 }
79072805
LW		 6159
6160 if (kid->op_type != OP_MATCH) {
6161 OP *sibl = kid->op_sibling;
463ee0b2 6162 kid->op_sibling = 0;
79072805 6163 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6164 if (cLISTOPo->op_first == cLISTOPo->op_last)
6165 cLISTOPo->op_last = kid;
6166 cLISTOPo->op_first = kid;
79072805
LW		 6167 kid->op_sibling = sibl;
6168 }
6169
6170 kid->op_type = OP_PUSHRE;
22c35a8c 6171 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6172 scalar(kid);
6173
6174 if (!kid->op_sibling)
54b9620d 6175 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6176
6177 kid = kid->op_sibling;
6178 scalar(kid);
6179
6180 if (!kid->op_sibling)
11343788 6181 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6182
6183 kid = kid->op_sibling;
6184 scalar(kid);
6185
6186 if (kid->op_sibling)
22c35a8c 6187 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6188
11343788 6189 return o;
79072805
LW		 6190}
6191
6192OP *
eb6e2d6f
GS		 6193Perl_ck_join(pTHX_ OP *o)
6194{
6195 if (ckWARN(WARN_SYNTAX)) {
6196 OP *kid = cLISTOPo->op_first->op_sibling;
6197 if (kid && kid->op_type == OP_MATCH) {
6198 char *pmstr = "STRING";
6199 if (kPMOP->op_pmregexp)
6200 pmstr = kPMOP->op_pmregexp->precomp;
6201 Perl_warner(aTHX_ WARN_SYNTAX,
6202 "/%s/ should probably be written as \"%s\"",
6203 pmstr, pmstr);
6204 }
6205 }
6206 return ck_fun(o);
6207}
6208
6209OP *
cea2e8a9 6210Perl_ck_subr(pTHX_ OP *o)
79072805 6211{
11343788
MB		 6212 dTHR;
6213 OP *prev = ((cUNOPo->op_first->op_sibling)
6214 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6215 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6216 OP *cvop;
6217 char *proto = 0;
6218 CV *cv = 0;
46fc3d4c 6219 GV *namegv = 0;
4633a7c4
LW		 6220 int optional = 0;
6221 I32 arg = 0;
2d8e6c8d 6222 STRLEN n_a;
4633a7c4 6223
d3011074 6224 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6225 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6226 if (cvop->op_type == OP_RV2CV) {
6227 SVOP* tmpop;
11343788 6228 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6229 null(cvop); /* disable rv2cv */
6230 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6231 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6232 GV *gv = cGVOPx_gv(tmpop);
350de78d 6233 cv = GvCVu(gv);
76cd736e
GS		 6234 if (!cv)
6235 tmpop->op_private |= OPpEARLY_CV;
6236 else if (SvPOK(cv)) {
350de78d 6237 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6238 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6239 }
4633a7c4
LW		 6240 }
6241 }
f5d5a27c 6242 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6243 if (o2->op_type == OP_CONST)
6244 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6245 else if (o2->op_type == OP_LIST) {
6246 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6247 if (o && o->op_type == OP_CONST)
6248 o->op_private &= ~OPpCONST_STRICT;
6249 }
7a52d87a 6250 }
3280af22
NIS		 6251 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6252 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6253 o->op_private |= OPpENTERSUB_DB;
6254 while (o2 != cvop) {
4633a7c4
LW		 6255 if (proto) {
6256 switch (*proto) {
6257 case '\0':
5dc0d613 6258 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6259 case ';':
6260 optional = 1;
6261 proto++;
6262 continue;
6263 case '$':
6264 proto++;
6265 arg++;
11343788 6266 scalar(o2);
4633a7c4
LW		 6267 break;
6268 case '%':
6269 case '@':
11343788 6270 list(o2);
4633a7c4
LW		 6271 arg++;
6272 break;
6273 case '&':
6274 proto++;
6275 arg++;
11343788 6276 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6277 bad_type(arg,
6278 arg == 1 ? "block or sub {}" : "sub {}",
6279 gv_ename(namegv), o2);
4633a7c4
LW		 6280 break;
6281 case '*':
2ba6ecf4 6282 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6283 proto++;
6284 arg++;
11343788 6285 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6286 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6287 else if (o2->op_type == OP_CONST)
6288 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6289 else if (o2->op_type == OP_ENTERSUB) {
6290 /* accidental subroutine, revert to bareword */
6291 OP *gvop = ((UNOP*)o2)->op_first;
6292 if (gvop && gvop->op_type == OP_NULL) {
6293 gvop = ((UNOP*)gvop)->op_first;
6294 if (gvop) {
6295 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6296 ;
6297 if (gvop &&
6298 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6299 (gvop = ((UNOP*)gvop)->op_first) &&
6300 gvop->op_type == OP_GV)
6301 {
638eceb6 6302 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6303 OP *sibling = o2->op_sibling;
2692f720 6304 SV *n = newSVpvn("",0);
9675f7ac 6305 op_free(o2);
2692f720
GS		 6306 gv_fullname3(n, gv, "");
6307 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6308 sv_chop(n, SvPVX(n)+6);
6309 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6310 prev->op_sibling = o2;
6311 o2->op_sibling = sibling;
6312 }
6313 }
6314 }
6315 }
2ba6ecf4
GS		 6316 scalar(o2);
6317 break;
4633a7c4
LW		 6318 case '\\':
6319 proto++;
6320 arg++;
6321 switch (*proto++) {
6322 case '*':
11343788 6323 if (o2->op_type != OP_RV2GV)
5dc0d613 6324 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6325 goto wrapref;
6326 case '&':
75fc29ea
GS		 6327 if (o2->op_type != OP_ENTERSUB)
6328 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6329 goto wrapref;
6330 case '$':
386acf99
GS		 6331 if (o2->op_type != OP_RV2SV
6332 && o2->op_type != OP_PADSV
1c01eb51
GS		 6333 && o2->op_type != OP_HELEM
6334 && o2->op_type != OP_AELEM
386acf99
GS		 6335 && o2->op_type != OP_THREADSV)
6336 {
5dc0d613 6337 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6338 }
4633a7c4
LW		 6339 goto wrapref;
6340 case '@':
11343788 6341 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6342 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6343 goto wrapref;
6344 case '%':
11343788 6345 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6346 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6347 wrapref:
6348 {
11343788 6349 OP* kid = o2;
6fa846a0 6350 OP* sib = kid->op_sibling;
4633a7c4 6351 kid->op_sibling = 0;
6fa846a0
GS		 6352 o2 = newUNOP(OP_REFGEN, 0, kid);
6353 o2->op_sibling = sib;
e858de61 6354 prev->op_sibling = o2;
4633a7c4
LW		 6355 }
6356 break;
6357 default: goto oops;
6358 }
6359 break;
b1cb66bf 6360 case ' ':
6361 proto++;
6362 continue;
4633a7c4
LW		 6363 default:
6364 oops:
cea2e8a9 6365 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6366 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6367 }
6368 }
6369 else
11343788
MB		 6370 list(o2);
6371 mod(o2, OP_ENTERSUB);
6372 prev = o2;
6373 o2 = o2->op_sibling;
4633a7c4 6374 }
fb73857a 6375 if (proto && !optional &&
6376 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6377 return too_few_arguments(o, gv_ename(namegv));
11343788 6378 return o;
79072805
LW		 6379}
6380
6381OP *
cea2e8a9 6382Perl_ck_svconst(pTHX_ OP *o)
8990e307 6383{
11343788
MB		 6384 SvREADONLY_on(cSVOPo->op_sv);
6385 return o;
8990e307
LW		 6386}
6387
6388OP *
cea2e8a9 6389Perl_ck_trunc(pTHX_ OP *o)
79072805 6390{
11343788
MB		 6391 if (o->op_flags & OPf_KIDS) {
6392 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6393
a0d0e21e
LW		 6394 if (kid->op_type == OP_NULL)
6395 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6396 if (kid && kid->op_type == OP_CONST &&
6397 (kid->op_private & OPpCONST_BARE))
6398 {
11343788 6399 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6400 kid->op_private &= ~OPpCONST_STRICT;
6401 }
79072805 6402 }
11343788 6403 return ck_fun(o);
79072805
LW		 6404}
6405
463ee0b2
LW		 6406/* A peephole optimizer. We visit the ops in the order they're to execute. */
6407
79072805 6408void
864dbfa3 6409Perl_peep(pTHX_ register OP *o)
79072805 6410{
11343788 6411 dTHR;
79072805 6412 register OP* oldop = 0;
2d8e6c8d 6413 STRLEN n_a;
cd06dffe 6414 OP *last_composite = Nullop;
2d8e6c8d 6415
a0d0e21e 6416 if (!o || o->op_seq)
79072805 6417 return;
a0d0e21e 6418 ENTER;
462e5cf6 6419 SAVEOP();
7766f137 6420 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6421 for (; o; o = o->op_next) {
6422 if (o->op_seq)
6423 break;
3280af22
NIS		 6424 if (!PL_op_seqmax)
6425 PL_op_seqmax++;
533c011a 6426 PL_op = o;
a0d0e21e 6427 switch (o->op_type) {
acb36ea4 6428 case OP_SETSTATE:
a0d0e21e
LW		 6429 case OP_NEXTSTATE:
6430 case OP_DBSTATE:
3280af22
NIS		 6431 PL_curcop = ((COP*)o); /* for warnings */
6432 o->op_seq = PL_op_seqmax++;
cd06dffe 6433 last_composite = Nullop;
a0d0e21e
LW		 6434 break;
6435
a0d0e21e 6436 case OP_CONST:
7a52d87a
GS		 6437 if (cSVOPo->op_private & OPpCONST_STRICT)
6438 no_bareword_allowed(o);
7766f137
GS		 6439#ifdef USE_ITHREADS
6440 /* Relocate sv to the pad for thread safety.
6441 * Despite being a "constant", the SV is written to,
6442 * for reference counts, sv_upgrade() etc. */
6443 if (cSVOP->op_sv) {
6444 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6445 if (SvPADTMP(cSVOPo->op_sv)) {
6446 /* If op_sv is already a PADTMP then it is being used by
6447 * another pad, so make a copy. */
6448 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6449 SvREADONLY_on(PL_curpad[ix]);
6450 SvREFCNT_dec(cSVOPo->op_sv);
6451 }
6452 else {
6453 SvREFCNT_dec(PL_curpad[ix]);
6454 SvPADTMP_on(cSVOPo->op_sv);
6455 PL_curpad[ix] = cSVOPo->op_sv;
6456 }
7766f137
GS		 6457 cSVOPo->op_sv = Nullsv;
6458 o->op_targ = ix;
6459 }
6460#endif
07447971
GS		 6461 o->op_seq = PL_op_seqmax++;
6462 break;
6463
ed7ab888 6464 case OP_CONCAT:
b162f9ea
IZ		 6465 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6466 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6467 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6468 goto ignore_optimization;
cd06dffe 6469 else {
07447971 6470 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6471 o->op_targ = o->op_next->op_targ;
743e66e6 6472 o->op_next->op_targ = 0;
2c2d71f5 6473 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6474 }
6475 }
a0d0e21e 6476 null(o->op_next);
b162f9ea
IZ		 6477 }
6478 ignore_optimization:
3280af22 6479 o->op_seq = PL_op_seqmax++;
a0d0e21e 6480 break;
8990e307 6481 case OP_STUB:
54310121 6482 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6483 o->op_seq = PL_op_seqmax++;
54310121 6484 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6485 }
748a9306 6486 goto nothin;
79072805 6487 case OP_NULL:
acb36ea4
GS		 6488 if (o->op_targ == OP_NEXTSTATE
6489 || o->op_targ == OP_DBSTATE
6490 || o->op_targ == OP_SETSTATE)
6491 {
3280af22 6492 PL_curcop = ((COP*)o);
acb36ea4 6493 }
748a9306 6494 goto nothin;
79072805 6495 case OP_SCALAR:
93a17b20 6496 case OP_LINESEQ:
463ee0b2 6497 case OP_SCOPE:
748a9306 6498 nothin:
a0d0e21e
LW		 6499 if (oldop && o->op_next) {
6500 oldop->op_next = o->op_next;
79072805
LW		 6501 continue;
6502 }
3280af22 6503 o->op_seq = PL_op_seqmax++;
79072805
LW		 6504 break;
6505
6506 case OP_GV:
a0d0e21e 6507 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6508 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6509 null(o->op_next);
64aac5a9
GS		 6510 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6511 | OPpOUR_INTRO);
a0d0e21e
LW		 6512 o->op_next = o->op_next->op_next;
6513 o->op_type = OP_GVSV;
22c35a8c 6514 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6515 }
6516 }
a0d0e21e
LW		 6517 else if (o->op_next->op_type == OP_RV2AV) {
6518 OP* pop = o->op_next->op_next;
6519 IV i;
8990e307 6520 if (pop->op_type == OP_CONST &&
533c011a 6521 (PL_op = pop->op_next) &&
8990e307 6522 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6523 !(pop->op_next->op_private &
68dc0745 6524 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6525 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6526 <= 255 &&
8990e307
LW		 6527 i >= 0)
6528 {
350de78d 6529 GV *gv;
a0d0e21e 6530 null(o->op_next);
8990e307
LW		 6531 null(pop->op_next);
6532 null(pop);
a0d0e21e
LW		 6533 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6534 o->op_next = pop->op_next->op_next;
6535 o->op_type = OP_AELEMFAST;
22c35a8c 6536 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6537 o->op_private = (U8)i;
638eceb6 6538 gv = cGVOPo_gv;
350de78d 6539 GvAVn(gv);
8990e307 6540 }
79072805 6541 }
e476b1b5 6542 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6543 GV *gv = cGVOPo_gv;
76cd736e
GS		 6544 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6545 /* XXX could check prototype here instead of just carping */
6546 SV *sv = sv_newmortal();
6547 gv_efullname3(sv, gv, Nullch);
e476b1b5 6548 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6549 "%s() called too early to check prototype",
6550 SvPV_nolen(sv));
6551 }
6552 }
6553
3280af22 6554 o->op_seq = PL_op_seqmax++;
79072805
LW		 6555 break;
6556
a0d0e21e 6557 case OP_MAPWHILE:
79072805
LW		 6558 case OP_GREPWHILE:
6559 case OP_AND:
6560 case OP_OR:
2c2d71f5
JH		 6561 case OP_ANDASSIGN:
6562 case OP_ORASSIGN:
1a67a97c
SM		 6563 case OP_COND_EXPR:
6564 case OP_RANGE:
3280af22 6565 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6566 while (cLOGOP->op_other->op_type == OP_NULL)
6567 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6568 peep(cLOGOP->op_other);
6569 break;
6570
79072805 6571 case OP_ENTERLOOP:
3280af22 6572 o->op_seq = PL_op_seqmax++;
79072805
LW		 6573 peep(cLOOP->op_redoop);
6574 peep(cLOOP->op_nextop);
6575 peep(cLOOP->op_lastop);
6576 break;
6577
8782bef2 6578 case OP_QR:
79072805
LW		 6579 case OP_MATCH:
6580 case OP_SUBST:
3280af22 6581 o->op_seq = PL_op_seqmax++;
a0d0e21e 6582 peep(cPMOP->op_pmreplstart);
79072805
LW		 6583 break;
6584
a0d0e21e 6585 case OP_EXEC:
3280af22 6586 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6587 if (ckWARN(WARN_SYNTAX) && o->op_next
6588 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6589 if (o->op_next->op_sibling &&
20408e3c
GS		 6590 o->op_next->op_sibling->op_type != OP_EXIT &&
6591 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6592 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6593 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6594
57843af0 6595 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6596 Perl_warner(aTHX_ WARN_EXEC,
6597 "Statement unlikely to be reached");
6598 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6599 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6600 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6601 }
6602 }
6603 break;
aeea060c 6604
c750a3ec
MB		 6605 case OP_HELEM: {
6606 UNOP *rop;
6607 SV *lexname;
6608 GV **fields;
9615e741 6609 SV **svp, **indsvp, *sv;
c750a3ec
MB		 6610 I32 ind;
6611 char *key;
6612 STRLEN keylen;
aeea060c 6613
9615e741 6614 o->op_seq = PL_op_seqmax++;
377b21bb 6615 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6616 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6617 break;
6618 rop = (UNOP*)((BINOP*)o)->op_first;
6619 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6620 break;
3280af22 6621 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6622 if (!SvOBJECT(lexname))
6623 break;
5196be3e 6624 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6625 if (!fields || !GvHV(*fields))
6626 break;
638eceb6 6627 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6628 key = SvPV(*svp, keylen);
6629 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6630 if (!indsvp) {
88e9b055 6631 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6632 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6633 }
6634 ind = SvIV(*indsvp);
6635 if (ind < 1)
cea2e8a9 6636 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6637 rop->op_type = OP_RV2AV;
22c35a8c 6638 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6639 o->op_type = OP_AELEM;
22c35a8c 6640 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6641 sv = newSViv(ind);
6642 if (SvREADONLY(*svp))
6643 SvREADONLY_on(sv);
6644 SvFLAGS(sv) |= (SvFLAGS(*svp)
6645 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6646 SvREFCNT_dec(*svp);
9615e741 6647 *svp = sv;
c750a3ec
MB		 6648 break;
6649 }
345599ca
GS		 6650
6651 case OP_HSLICE: {
6652 UNOP *rop;
6653 SV *lexname;
6654 GV **fields;
9615e741 6655 SV **svp, **indsvp, *sv;
345599ca
GS		 6656 I32 ind;
6657 char *key;
6658 STRLEN keylen;
6659 SVOP *first_key_op, *key_op;
9615e741
GS		 6660
6661 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6662 if ((o->op_private & (OPpLVAL_INTRO))
6663 /* I bet there's always a pushmark... */
6664 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6665 /* hmmm, no optimization if list contains only one key. */
6666 break;
6667 rop = (UNOP*)((LISTOP*)o)->op_last;
6668 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6669 break;
6670 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6671 if (!SvOBJECT(lexname))
6672 break;
6673 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6674 if (!fields || !GvHV(*fields))
6675 break;
6676 /* Again guessing that the pushmark can be jumped over.... */
6677 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6678 ->op_first->op_sibling;
6679 /* Check that the key list contains only constants. */
6680 for (key_op = first_key_op; key_op;
6681 key_op = (SVOP*)key_op->op_sibling)
6682 if (key_op->op_type != OP_CONST)
6683 break;
6684 if (key_op)
6685 break;
6686 rop->op_type = OP_RV2AV;
6687 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6688 o->op_type = OP_ASLICE;
6689 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6690 for (key_op = first_key_op; key_op;
6691 key_op = (SVOP*)key_op->op_sibling) {
6692 svp = cSVOPx_svp(key_op);
6693 key = SvPV(*svp, keylen);
6694 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6695 if (!indsvp) {
9615e741
GS		 6696 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6697 "in variable %s of type %s",
345599ca
GS		 6698 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6699 }
6700 ind = SvIV(*indsvp);
6701 if (ind < 1)
6702 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6703 sv = newSViv(ind);
6704 if (SvREADONLY(*svp))
6705 SvREADONLY_on(sv);
6706 SvFLAGS(sv) |= (SvFLAGS(*svp)
6707 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6708 SvREFCNT_dec(*svp);
9615e741 6709 *svp = sv;
345599ca
GS		 6710 }
6711 break;
6712 }
c750a3ec 6713
cd06dffe
GS		 6714 case OP_RV2AV:
6715 case OP_RV2HV:
6716 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6717 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6718 {
cd06dffe 6719 last_composite = o;
e1f15930 6720 }
cd06dffe
GS		 6721 o->op_seq = PL_op_seqmax++;
6722 break;
6723
6724 case OP_RETURN:
970c4905 6725 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6726 o->op_seq = PL_op_seqmax++;
6727 break;
6728 }
6729 /* FALL THROUGH */
6730
6731 case OP_LEAVESUBLV:
6732 if (last_composite) {
6733 OP *r = last_composite;
6734
6735 while (r->op_sibling)
6736 r = r->op_sibling;
6737 if (r->op_next == o
6738 || (r->op_next->op_type == OP_LIST
6739 && r->op_next->op_next == o))
6740 {
6741 if (last_composite->op_type == OP_RV2AV)
6742 yyerror("Lvalue subs returning arrays not implemented yet");
6743 else
6744 yyerror("Lvalue subs returning hashes not implemented yet");
6745 ;
6746 }
6747 }
6748 /* FALL THROUGH */
6749
79072805 6750 default:
3280af22 6751 o->op_seq = PL_op_seqmax++;
79072805
LW		 6752 break;
6753 }
a0d0e21e 6754 oldop = o;
79072805 6755 }
a0d0e21e 6756 LEAVE;
79072805 6757}
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