This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
https://perl5.git.perl.org / perl5.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mention handle autovivification in perldata (from Johan Vromans)
[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
165 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
166 && strEQ(name, SvPVX(sv)))
f472eb5c 167 {
e476b1b5 168 Perl_warner(aTHX_ WARN_MISC,
33633739 169 "\"our\" variable %s redeclared", name);
e476b1b5 170 Perl_warner(aTHX_ WARN_MISC,
33633739
GS		 171 "(Did you mean \"local\" instead of \"our\"?)\n");
172 break;
f472eb5c 173 }
635bab04 174 } while ( off-- > 0 );
b1cb66bf 175 }
176 }
a0d0e21e
LW		 177 off = pad_alloc(OP_PADSV, SVs_PADMY);
178 sv = NEWSV(1102,0);
93a17b20
LW		 179 sv_upgrade(sv, SVt_PVNV);
180 sv_setpv(sv, name);
3280af22 181 if (PL_in_my_stash) {
c750a3ec 182 if (*name != '$')
eb64745e
GS		 183 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
184 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 185 SvOBJECT_on(sv);
186 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 187 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
188 PL_sv_objcount++;
c750a3ec 189 }
f472eb5c
GS		 190 if (PL_in_my == KEY_our) {
191 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 192 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 193 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 194 }
3280af22 195 av_store(PL_comppad_name, off, sv);
65202027 196 SvNVX(sv) = (NV)PAD_MAX;
8990e307 197 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 198 if (!PL_min_intro_pending)
199 PL_min_intro_pending = off;
200 PL_max_intro_pending = off;
93a17b20 201 if (*name == '@')
3280af22 202 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 203 else if (*name == '%')
3280af22
NIS		 204 av_store(PL_comppad, off, (SV*)newHV());
205 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 206 return off;
207}
208
94f23f41
GS		 209STATIC PADOFFSET
210S_pad_addlex(pTHX_ SV *proto_namesv)
211{
212 SV *namesv = NEWSV(1103,0);
213 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
214 sv_upgrade(namesv, SVt_PVNV);
215 sv_setpv(namesv, SvPVX(proto_namesv));
216 av_store(PL_comppad_name, newoff, namesv);
217 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
218 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
219 SvFAKE_on(namesv); /* A ref, not a real var */
220 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
221 SvFLAGS(namesv) |= SVpad_OUR;
222 (void)SvUPGRADE(namesv, SVt_PVGV);
223 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
224 }
225 if (SvOBJECT(proto_namesv)) { /* A typed var */
226 SvOBJECT_on(namesv);
227 (void)SvUPGRADE(namesv, SVt_PVMG);
228 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
229 PL_sv_objcount++;
230 }
231 return newoff;
232}
233
2680586e
GS		 234#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
235
76e3520e 236STATIC PADOFFSET
cea2e8a9 237S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 238 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 239{
11343788 240 dTHR;
748a9306 241 CV *cv;
93a17b20
LW		 242 I32 off;
243 SV *sv;
93a17b20 244 register I32 i;
c09156bb 245 register PERL_CONTEXT *cx;
93a17b20 246
748a9306 247 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 248 AV *curlist = CvPADLIST(cv);
249 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 250 AV *curname;
4fdae800 251
3280af22 252 if (!svp || *svp == &PL_sv_undef)
4633a7c4 253 continue;
748a9306
LW		 254 curname = (AV*)*svp;
255 svp = AvARRAY(curname);
93965878 256 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 257 if ((sv = svp[off]) &&
3280af22 258 sv != &PL_sv_undef &&
748a9306 259 seq <= SvIVX(sv) &&
13826f2c 260 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 261 strEQ(SvPVX(sv), name))
262 {
5f05dabc 263 I32 depth;
264 AV *oldpad;
265 SV *oldsv;
266
267 depth = CvDEPTH(cv);
268 if (!depth) {
9607fc9c 269 if (newoff) {
270 if (SvFAKE(sv))
271 continue;
4fdae800 272 return 0; /* don't clone from inactive stack frame */
9607fc9c 273 }
5f05dabc 274 depth = 1;
275 }
94f23f41 276 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 277 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 278 if (!newoff) { /* Not a mere clone operation. */
94f23f41 279 newoff = pad_addlex(sv);
3280af22 280 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 281 /* "It's closures all the way down." */
3280af22 282 CvCLONE_on(PL_compcv);
54310121 283 if (cv == startcv) {
3280af22 284 if (CvANON(PL_compcv))
54310121 285 oldsv = Nullsv; /* no need to keep ref */
286 }
287 else {
28757baa 288 CV *bcv;
289 for (bcv = startcv;
290 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 291 bcv = CvOUTSIDE(bcv))
292 {
94f23f41
GS		 293 if (CvANON(bcv)) {
294 /* install the missing pad entry in intervening
295 * nested subs and mark them cloneable.
296 * XXX fix pad_foo() to not use globals */
297 AV *ocomppad_name = PL_comppad_name;
298 AV *ocomppad = PL_comppad;
299 SV **ocurpad = PL_curpad;
300 AV *padlist = CvPADLIST(bcv);
301 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
302 PL_comppad = (AV*)AvARRAY(padlist)[1];
303 PL_curpad = AvARRAY(PL_comppad);
304 pad_addlex(sv);
305 PL_comppad_name = ocomppad_name;
306 PL_comppad = ocomppad;
307 PL_curpad = ocurpad;
28757baa 308 CvCLONE_on(bcv);
94f23f41 309 }
28757baa 310 else {
6b35e009
GS		 311 if (ckWARN(WARN_CLOSURE)
312 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
313 {
cea2e8a9 314 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 315 "Variable \"%s\" may be unavailable",
28757baa 316 name);
6b35e009 317 }
28757baa 318 break;
319 }
320 }
321 }
322 }
3280af22 323 else if (!CvUNIQUE(PL_compcv)) {
599cee73 324 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 325 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 326 "Variable \"%s\" will not stay shared", name);
5f05dabc 327 }
748a9306 328 }
3280af22 329 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 330 return newoff;
331 }
93a17b20
LW		 332 }
333 }
334
2680586e
GS		 335 if (flags & FINDLEX_NOSEARCH)
336 return 0;
337
93a17b20
LW		 338 /* Nothing in current lexical context--try eval's context, if any.
339 * This is necessary to let the perldb get at lexically scoped variables.
340 * XXX This will also probably interact badly with eval tree caching.
341 */
342
748a9306 343 for (i = cx_ix; i >= 0; i--) {
93a17b20 344 cx = &cxstack[i];
6b35e009 345 switch (CxTYPE(cx)) {
93a17b20 346 default:
748a9306
LW		 347 if (i == 0 && saweval) {
348 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 349 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 350 }
93a17b20
LW		 351 break;
352 case CXt_EVAL:
44a8e56a 353 switch (cx->blk_eval.old_op_type) {
354 case OP_ENTEREVAL:
6b35e009
GS		 355 if (CxREALEVAL(cx))
356 saweval = i;
44a8e56a 357 break;
faa7e5bb 358 case OP_DOFILE:
44a8e56a 359 case OP_REQUIRE:
faa7e5bb 360 /* require/do must have their own scope */
44a8e56a 361 return 0;
362 }
93a17b20 363 break;
7766f137 364 case CXt_FORMAT:
93a17b20
LW		 365 case CXt_SUB:
366 if (!saweval)
367 return 0;
368 cv = cx->blk_sub.cv;
3280af22 369 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 370 saweval = i; /* so we know where we were called from */
93a17b20 371 continue;
93a17b20 372 }
748a9306 373 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 374 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 375 }
376 }
377
748a9306
LW		 378 return 0;
379}
a0d0e21e 380
748a9306 381PADOFFSET
864dbfa3 382Perl_pad_findmy(pTHX_ char *name)
748a9306 383{
11343788 384 dTHR;
748a9306 385 I32 off;
54310121 386 I32 pendoff = 0;
748a9306 387 SV *sv;
3280af22
NIS		 388 SV **svp = AvARRAY(PL_comppad_name);
389 U32 seq = PL_cop_seqmax;
6b35e009 390 PERL_CONTEXT *cx;
33b8ce05 391 CV *outside;
748a9306 392
11343788
MB		 393#ifdef USE_THREADS
394 /*
395 * Special case to get lexical (and hence per-thread) @_.
396 * XXX I need to find out how to tell at parse-time whether use
397 * of @_ should refer to a lexical (from a sub) or defgv (global
398 * scope and maybe weird sub-ish things like formats). See
399 * startsub in perly.y. It's possible that @_ could be lexical
400 * (at least from subs) even in non-threaded perl.
401 */
402 if (strEQ(name, "@_"))
403 return 0; /* success. (NOT_IN_PAD indicates failure) */
404#endif /* USE_THREADS */
405
748a9306 406 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 407 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 408 if ((sv = svp[off]) &&
3280af22 409 sv != &PL_sv_undef &&
54310121 410 (!SvIVX(sv) ||
411 (seq <= SvIVX(sv) &&
412 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 413 strEQ(SvPVX(sv), name))
414 {
77ca0c92 415 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 416 return (PADOFFSET)off;
417 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 418 }
419 }
748a9306 420
33b8ce05
GS		 421 outside = CvOUTSIDE(PL_compcv);
422
423 /* Check if if we're compiling an eval'', and adjust seq to be the
424 * eval's seq number. This depends on eval'' having a non-null
425 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 426 * identified by CvEVAL being true and CvGV being null. */
427 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 428 cx = &cxstack[cxstack_ix];
429 if (CxREALEVAL(cx))
430 seq = cx->blk_oldcop->cop_seq;
431 }
432
748a9306 433 /* See if it's in a nested scope */
2680586e 434 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 435 if (off) {
436 /* If there is a pending local definition, this new alias must die */
437 if (pendoff)
3280af22 438 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 439 return off; /* pad_findlex returns 0 for failure...*/
54310121 440 }
11343788 441 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 442}
443
444void
864dbfa3 445Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 446{
0453d815 447 dTHR;
93a17b20 448 I32 off;
3280af22 449 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 450 SV *sv;
3280af22
NIS		 451 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
452 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 453 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
454 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 455 }
456 }
457 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 458 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 459 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 460 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 461 }
462}
463
464PADOFFSET
864dbfa3 465Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 466{
11343788 467 dTHR;
79072805
LW		 468 SV *sv;
469 I32 retval;
470
3280af22 471 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 472 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 473 if (PL_pad_reset_pending)
a0d0e21e 474 pad_reset();
ed6116ce 475 if (tmptype & SVs_PADMY) {
79072805 476 do {
3280af22 477 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 478 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 479 retval = AvFILLp(PL_comppad);
79072805
LW		 480 }
481 else {
3280af22
NIS		 482 SV **names = AvARRAY(PL_comppad_name);
483 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 484 for (;;) {
485 /*
486 * "foreach" index vars temporarily become aliases to non-"my"
487 * values. Thus we must skip, not just pad values that are
488 * marked as current pad values, but also those with names.
489 */
3280af22
NIS		 490 if (++PL_padix <= names_fill &&
491 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 492 continue;
3280af22 493 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 494 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 495 break;
496 }
3280af22 497 retval = PL_padix;
79072805 498 }
8990e307 499 SvFLAGS(sv) |= tmptype;
3280af22 500 PL_curpad = AvARRAY(PL_comppad);
11343788 501#ifdef USE_THREADS
b900a521
JH		 502 DEBUG_X(PerlIO_printf(Perl_debug_log,
503 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
504 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 505 (long) retval, PL_op_name[optype]));
11343788 506#else
b900a521
JH		 507 DEBUG_X(PerlIO_printf(Perl_debug_log,
508 "Pad 0x%"UVxf" alloc %ld for %s\n",
509 PTR2UV(PL_curpad),
22c35a8c 510 (long) retval, PL_op_name[optype]));
11343788 511#endif /* USE_THREADS */
79072805
LW		 512 return (PADOFFSET)retval;
513}
514
515SV *
864dbfa3 516Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 517{
11343788
MB		 518 dTHR;
519#ifdef USE_THREADS
b900a521 520 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 521 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
522 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 523#else
79072805 524 if (!po)
cea2e8a9 525 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 526 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
527 PTR2UV(PL_curpad), (IV)po));
11343788 528#endif /* USE_THREADS */
3280af22 529 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 530}
531
532void
864dbfa3 533Perl_pad_free(pTHX_ PADOFFSET po)
79072805 534{
11343788 535 dTHR;
3280af22 536 if (!PL_curpad)
a0d0e21e 537 return;
3280af22 538 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 539 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 540 if (!po)
cea2e8a9 541 Perl_croak(aTHX_ "panic: pad_free po");
11343788 542#ifdef USE_THREADS
b900a521 543 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 544 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 545 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 546#else
97835f67
JH		 547 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
548 PTR2UV(PL_curpad), (IV)po));
11343788 549#endif /* USE_THREADS */
2aa1bedc 550 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 551 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 552#ifdef USE_ITHREADS
553 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
554#endif
555 }
3280af22
NIS		 556 if ((I32)po < PL_padix)
557 PL_padix = po - 1;
79072805
LW		 558}
559
560void
864dbfa3 561Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 562{
11343788 563 dTHR;
3280af22 564 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 565 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 566 if (!po)
cea2e8a9 567 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 568#ifdef USE_THREADS
b900a521 569 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 570 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
571 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 572#else
97835f67
JH		 573 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
574 PTR2UV(PL_curpad), (IV)po));
11343788 575#endif /* USE_THREADS */
3280af22
NIS		 576 SvPADTMP_off(PL_curpad[po]);
577 PL_curpad[po] = NEWSV(1107,0);
578 SvPADTMP_on(PL_curpad[po]);
579 if ((I32)po < PL_padix)
580 PL_padix = po - 1;
79072805
LW		 581}
582
d9bb4600
GS		 583/* XXX pad_reset() is currently disabled because it results in serious bugs.
584 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
585 * on the stack by OPs that use them, there are several ways to get an alias
586 * to a shared TARG. Such an alias will change randomly and unpredictably.
587 * We avoid doing this until we can think of a Better Way.
588 * GSAR 97-10-29 */
79072805 589void
864dbfa3 590Perl_pad_reset(pTHX)
79072805 591{
d9bb4600 592#ifdef USE_BROKEN_PAD_RESET
11343788 593 dTHR;
79072805
LW		 594 register I32 po;
595
6b88bc9c 596 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 597 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 598#ifdef USE_THREADS
b900a521
JH		 599 DEBUG_X(PerlIO_printf(Perl_debug_log,
600 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
601 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 602#else
b900a521
JH		 603 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
604 PTR2UV(PL_curpad)));
11343788 605#endif /* USE_THREADS */
6b88bc9c
GS		 606 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
607 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
608 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
609 SvPADTMP_off(PL_curpad[po]);
748a9306 610 }
6b88bc9c 611 PL_padix = PL_padix_floor;
79072805 612 }
d9bb4600 613#endif
3280af22 614 PL_pad_reset_pending = FALSE;
79072805
LW		 615}
616
a863c7d1 617#ifdef USE_THREADS
54b9620d 618/* find_threadsv is not reentrant */
a863c7d1 619PADOFFSET
864dbfa3 620Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 621{
622 dTHR;
623 char *p;
624 PADOFFSET key;
554b3eca 625 SV **svp;
54b9620d 626 /* We currently only handle names of a single character */
533c011a 627 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 628 if (!p)
629 return NOT_IN_PAD;
533c011a 630 key = p - PL_threadsv_names;
2d8e6c8d 631 MUTEX_LOCK(&thr->mutex);
54b9620d 632 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 633 if (svp)
634 MUTEX_UNLOCK(&thr->mutex);
635 else {
554b3eca 636 SV *sv = NEWSV(0, 0);
54b9620d 637 av_store(thr->threadsv, key, sv);
940cb80d 638 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 639 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 640 /*
641 * Some magic variables used to be automagically initialised
642 * in gv_fetchpv. Those which are now per-thread magicals get
643 * initialised here instead.
644 */
645 switch (*name) {
54b9620d
MB		 646 case '_':
647 break;
554b3eca
MB		 648 case ';':
649 sv_setpv(sv, "\034");
54b9620d 650 sv_magic(sv, 0, 0, name, 1);
554b3eca 651 break;
c277df42
IZ		 652 case '&':
653 case '`':
654 case '\'':
533c011a 655 PL_sawampersand = TRUE;
a3f914c5
GS		 656 /* FALL THROUGH */
657 case '1':
658 case '2':
659 case '3':
660 case '4':
661 case '5':
662 case '6':
663 case '7':
664 case '8':
665 case '9':
c277df42 666 SvREADONLY_on(sv);
d8b5173a 667 /* FALL THROUGH */
067391ea
GS		 668
669 /* XXX %! tied to Errno.pm needs to be added here.
670 * See gv_fetchpv(). */
671 /* case '!': */
672
54b9620d
MB		 673 default:
674 sv_magic(sv, 0, 0, name, 1);
554b3eca 675 }
bf49b057 676 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 677 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 678 sv, (*name < 32) ? "^" : "",
679 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 680 }
681 return key;
682}
683#endif /* USE_THREADS */
684
79072805
LW		 685/* Destructor */
686
687void
864dbfa3 688Perl_op_free(pTHX_ OP *o)
79072805 689{
85e6fe83 690 register OP *kid, *nextkid;
acb36ea4 691 OPCODE type;
79072805 692
5dc0d613 693 if (!o || o->op_seq == (U16)-1)
79072805
LW		 694 return;
695
7934575e
GS		 696 if (o->op_private & OPpREFCOUNTED) {
697 switch (o->op_type) {
698 case OP_LEAVESUB:
699 case OP_LEAVESUBLV:
700 case OP_LEAVEEVAL:
701 case OP_LEAVE:
702 case OP_SCOPE:
703 case OP_LEAVEWRITE:
704 OP_REFCNT_LOCK;
705 if (OpREFCNT_dec(o)) {
706 OP_REFCNT_UNLOCK;
707 return;
708 }
709 OP_REFCNT_UNLOCK;
710 break;
711 default:
712 break;
713 }
714 }
715
11343788
MB		 716 if (o->op_flags & OPf_KIDS) {
717 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 718 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 719 op_free(kid);
85e6fe83 720 }
79072805 721 }
acb36ea4
GS		 722 type = o->op_type;
723 if (type == OP_NULL)
724 type = o->op_targ;
725
726 /* COP* is not cleared by op_clear() so that we may track line
727 * numbers etc even after null() */
728 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
729 cop_free((COP*)o);
730
731 op_clear(o);
732
733#ifdef PL_OP_SLAB_ALLOC
734 if ((char *) o == PL_OpPtr)
735 {
736 }
737#else
738 Safefree(o);
739#endif
740}
79072805 741
acb36ea4
GS		 742STATIC void
743S_op_clear(pTHX_ OP *o)
744{
11343788 745 switch (o->op_type) {
acb36ea4
GS		 746 case OP_NULL: /* Was holding old type, if any. */
747 case OP_ENTEREVAL: /* Was holding hints. */
748#ifdef USE_THREADS
749 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
750#endif
751 o->op_targ = 0;
a0d0e21e 752 break;
554b3eca 753#ifdef USE_THREADS
8dd3ba40
SM		 754 case OP_ENTERITER:
755 if (!(o->op_flags & OPf_SPECIAL))
756 break;
757 /* FALL THROUGH */
554b3eca 758#endif /* USE_THREADS */
a6006777 759 default:
ac4c12e7 760 if (!(o->op_flags & OPf_REF)
0b94c7bb 761 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 762 break;
763 /* FALL THROUGH */
463ee0b2 764 case OP_GVSV:
79072805 765 case OP_GV:
a6006777 766 case OP_AELEMFAST:
350de78d 767#ifdef USE_ITHREADS
971a9dd3
GS		 768 if (cPADOPo->op_padix > 0) {
769 if (PL_curpad) {
638eceb6 770 GV *gv = cGVOPo_gv;
971a9dd3
GS		 771 pad_swipe(cPADOPo->op_padix);
772 /* No GvIN_PAD_off(gv) here, because other references may still
773 * exist on the pad */
774 SvREFCNT_dec(gv);
775 }
776 cPADOPo->op_padix = 0;
777 }
350de78d 778#else
971a9dd3 779 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 780 cSVOPo->op_sv = Nullsv;
350de78d 781#endif
79072805
LW		 782 break;
783 case OP_CONST:
11343788 784 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 785 cSVOPo->op_sv = Nullsv;
79072805 786 break;
748a9306
LW		 787 case OP_GOTO:
788 case OP_NEXT:
789 case OP_LAST:
790 case OP_REDO:
11343788 791 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 792 break;
793 /* FALL THROUGH */
a0d0e21e 794 case OP_TRANS:
acb36ea4 795 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 796 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 797 cSVOPo->op_sv = Nullsv;
798 }
799 else {
a0ed51b3 800 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 801 cPVOPo->op_pv = Nullch;
802 }
a0d0e21e
LW		 803 break;
804 case OP_SUBST:
11343788 805 op_free(cPMOPo->op_pmreplroot);
971a9dd3 806 goto clear_pmop;
748a9306 807 case OP_PUSHRE:
971a9dd3
GS		 808#ifdef USE_ITHREADS
809 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
810 if (PL_curpad) {
811 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
812 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
813 /* No GvIN_PAD_off(gv) here, because other references may still
814 * exist on the pad */
815 SvREFCNT_dec(gv);
816 }
817 }
818#else
819 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
820#endif
821 /* FALL THROUGH */
a0d0e21e 822 case OP_MATCH:
8782bef2 823 case OP_QR:
971a9dd3
GS		 824clear_pmop:
825 cPMOPo->op_pmreplroot = Nullop;
c277df42 826 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 827 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 828 break;
79072805
LW		 829 }
830
743e66e6 831 if (o->op_targ > 0) {
11343788 832 pad_free(o->op_targ);
743e66e6
GS		 833 o->op_targ = 0;
834 }
79072805
LW		 835}
836
76e3520e 837STATIC void
3eb57f73
HS		 838S_cop_free(pTHX_ COP* cop)
839{
840 Safefree(cop->cop_label);
57843af0
GS		 841#ifdef USE_ITHREADS
842 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 843 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 844#else
11faa288 845 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 846 SvREFCNT_dec(CopFILEGV(cop));
57843af0 847#endif
0453d815 848 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 849 SvREFCNT_dec(cop->cop_warnings);
850}
851
852STATIC void
cea2e8a9 853S_null(pTHX_ OP *o)
8990e307 854{
acb36ea4
GS		 855 if (o->op_type == OP_NULL)
856 return;
857 op_clear(o);
11343788
MB		 858 o->op_targ = o->op_type;
859 o->op_type = OP_NULL;
22c35a8c 860 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 861}
862
79072805
LW		 863/* Contextualizers */
864
463ee0b2 865#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 866
867OP *
864dbfa3 868Perl_linklist(pTHX_ OP *o)
79072805
LW		 869{
870 register OP *kid;
871
11343788
MB		 872 if (o->op_next)
873 return o->op_next;
79072805
LW		 874
875 /* establish postfix order */
11343788
MB		 876 if (cUNOPo->op_first) {
877 o->op_next = LINKLIST(cUNOPo->op_first);
878 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 879 if (kid->op_sibling)
880 kid->op_next = LINKLIST(kid->op_sibling);
881 else
11343788 882 kid->op_next = o;
79072805
LW		 883 }
884 }
885 else
11343788 886 o->op_next = o;
79072805 887
11343788 888 return o->op_next;
79072805
LW		 889}
890
891OP *
864dbfa3 892Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 893{
894 OP *kid;
11343788
MB		 895 if (o && o->op_flags & OPf_KIDS) {
896 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 897 scalar(kid);
898 }
11343788 899 return o;
79072805
LW		 900}
901
76e3520e 902STATIC OP *
cea2e8a9 903S_scalarboolean(pTHX_ OP *o)
8990e307 904{
d008e5eb 905 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 906 dTHR;
d008e5eb 907 if (ckWARN(WARN_SYNTAX)) {
57843af0 908 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 909
d008e5eb 910 if (PL_copline != NOLINE)
57843af0 911 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 912 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 913 CopLINE_set(PL_curcop, oldline);
d008e5eb 914 }
a0d0e21e 915 }
11343788 916 return scalar(o);
8990e307
LW		 917}
918
919OP *
864dbfa3 920Perl_scalar(pTHX_ OP *o)
79072805
LW		 921{
922 OP *kid;
923
a0d0e21e 924 /* assumes no premature commitment */
3280af22 925 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 926 || o->op_type == OP_RETURN)
7e363e51 927 {
11343788 928 return o;
7e363e51 929 }
79072805 930
5dc0d613 931 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 932
11343788 933 switch (o->op_type) {
79072805 934 case OP_REPEAT:
11343788
MB		 935 if (o->op_private & OPpREPEAT_DOLIST)
936 null(((LISTOP*)cBINOPo->op_first)->op_first);
937 scalar(cBINOPo->op_first);
8990e307 938 break;
79072805
LW		 939 case OP_OR:
940 case OP_AND:
941 case OP_COND_EXPR:
11343788 942 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 943 scalar(kid);
79072805 944 break;
a0d0e21e 945 case OP_SPLIT:
11343788 946 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 947 if (!kPMOP->op_pmreplroot)
948 deprecate("implicit split to @_");
949 }
950 /* FALL THROUGH */
79072805 951 case OP_MATCH:
8782bef2 952 case OP_QR:
79072805
LW		 953 case OP_SUBST:
954 case OP_NULL:
8990e307 955 default:
11343788
MB		 956 if (o->op_flags & OPf_KIDS) {
957 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 958 scalar(kid);
959 }
79072805
LW		 960 break;
961 case OP_LEAVE:
962 case OP_LEAVETRY:
5dc0d613 963 kid = cLISTOPo->op_first;
54310121 964 scalar(kid);
155aba94 965 while ((kid = kid->op_sibling)) {
54310121 966 if (kid->op_sibling)
967 scalarvoid(kid);
968 else
969 scalar(kid);
970 }
3280af22 971 WITH_THR(PL_curcop = &PL_compiling);
54310121 972 break;
748a9306 973 case OP_SCOPE:
79072805 974 case OP_LINESEQ:
8990e307 975 case OP_LIST:
11343788 976 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 977 if (kid->op_sibling)
978 scalarvoid(kid);
979 else
980 scalar(kid);
981 }
3280af22 982 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 983 break;
984 }
11343788 985 return o;
79072805
LW		 986}
987
988OP *
864dbfa3 989Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 990{
991 OP *kid;
8990e307
LW		 992 char* useless = 0;
993 SV* sv;
2ebea0a1
GS		 994 U8 want;
995
acb36ea4
GS		 996 if (o->op_type == OP_NEXTSTATE
997 || o->op_type == OP_SETSTATE
998 || o->op_type == OP_DBSTATE
999 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1000 || o->op_targ == OP_SETSTATE
1001 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1002 {
1003 dTHR;
1004 PL_curcop = (COP*)o; /* for warning below */
1005 }
79072805 1006
54310121 1007 /* assumes no premature commitment */
2ebea0a1
GS		 1008 want = o->op_flags & OPf_WANT;
1009 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1010 || o->op_type == OP_RETURN)
7e363e51 1011 {
11343788 1012 return o;
7e363e51 1013 }
79072805 1014
b162f9ea 1015 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1016 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1017 {
b162f9ea 1018 return scalar(o); /* As if inside SASSIGN */
7e363e51 1019 }
b162f9ea 1020
5dc0d613 1021 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1022
11343788 1023 switch (o->op_type) {
79072805 1024 default:
22c35a8c 1025 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1026 break;
36477c24 1027 /* FALL THROUGH */
1028 case OP_REPEAT:
11343788 1029 if (o->op_flags & OPf_STACKED)
8990e307 1030 break;
5d82c453
GA		 1031 goto func_ops;
1032 case OP_SUBSTR:
1033 if (o->op_private == 4)
1034 break;
8990e307
LW		 1035 /* FALL THROUGH */
1036 case OP_GVSV:
1037 case OP_WANTARRAY:
1038 case OP_GV:
1039 case OP_PADSV:
1040 case OP_PADAV:
1041 case OP_PADHV:
1042 case OP_PADANY:
1043 case OP_AV2ARYLEN:
8990e307 1044 case OP_REF:
a0d0e21e
LW		 1045 case OP_REFGEN:
1046 case OP_SREFGEN:
8990e307
LW		 1047 case OP_DEFINED:
1048 case OP_HEX:
1049 case OP_OCT:
1050 case OP_LENGTH:
8990e307
LW		 1051 case OP_VEC:
1052 case OP_INDEX:
1053 case OP_RINDEX:
1054 case OP_SPRINTF:
1055 case OP_AELEM:
1056 case OP_AELEMFAST:
1057 case OP_ASLICE:
8990e307
LW		 1058 case OP_HELEM:
1059 case OP_HSLICE:
1060 case OP_UNPACK:
1061 case OP_PACK:
8990e307
LW		 1062 case OP_JOIN:
1063 case OP_LSLICE:
1064 case OP_ANONLIST:
1065 case OP_ANONHASH:
1066 case OP_SORT:
1067 case OP_REVERSE:
1068 case OP_RANGE:
1069 case OP_FLIP:
1070 case OP_FLOP:
1071 case OP_CALLER:
1072 case OP_FILENO:
1073 case OP_EOF:
1074 case OP_TELL:
1075 case OP_GETSOCKNAME:
1076 case OP_GETPEERNAME:
1077 case OP_READLINK:
1078 case OP_TELLDIR:
1079 case OP_GETPPID:
1080 case OP_GETPGRP:
1081 case OP_GETPRIORITY:
1082 case OP_TIME:
1083 case OP_TMS:
1084 case OP_LOCALTIME:
1085 case OP_GMTIME:
1086 case OP_GHBYNAME:
1087 case OP_GHBYADDR:
1088 case OP_GHOSTENT:
1089 case OP_GNBYNAME:
1090 case OP_GNBYADDR:
1091 case OP_GNETENT:
1092 case OP_GPBYNAME:
1093 case OP_GPBYNUMBER:
1094 case OP_GPROTOENT:
1095 case OP_GSBYNAME:
1096 case OP_GSBYPORT:
1097 case OP_GSERVENT:
1098 case OP_GPWNAM:
1099 case OP_GPWUID:
1100 case OP_GGRNAM:
1101 case OP_GGRGID:
1102 case OP_GETLOGIN:
5d82c453 1103 func_ops:
64aac5a9 1104 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1105 useless = PL_op_desc[o->op_type];
8990e307
LW		 1106 break;
1107
1108 case OP_RV2GV:
1109 case OP_RV2SV:
1110 case OP_RV2AV:
1111 case OP_RV2HV:
192587c2 1112 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1113 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1114 useless = "a variable";
1115 break;
79072805
LW		 1116
1117 case OP_CONST:
7766f137 1118 sv = cSVOPo_sv;
7a52d87a
GS		 1119 if (cSVOPo->op_private & OPpCONST_STRICT)
1120 no_bareword_allowed(o);
1121 else {
d008e5eb
GS		 1122 dTHR;
1123 if (ckWARN(WARN_VOID)) {
1124 useless = "a constant";
1125 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1126 useless = 0;
1127 else if (SvPOK(sv)) {
1128 if (strnEQ(SvPVX(sv), "di", 2) ||
1129 strnEQ(SvPVX(sv), "ds", 2) ||
1130 strnEQ(SvPVX(sv), "ig", 2))
1131 useless = 0;
1132 }
8990e307
LW		 1133 }
1134 }
acb36ea4 1135 null(o); /* don't execute or even remember it */
79072805
LW		 1136 break;
1137
1138 case OP_POSTINC:
11343788 1139 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1140 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1141 break;
1142
1143 case OP_POSTDEC:
11343788 1144 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1145 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1146 break;
1147
79072805
LW		 1148 case OP_OR:
1149 case OP_AND:
1150 case OP_COND_EXPR:
11343788 1151 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1152 scalarvoid(kid);
1153 break;
5aabfad6 1154
a0d0e21e 1155 case OP_NULL:
11343788 1156 if (o->op_flags & OPf_STACKED)
a0d0e21e 1157 break;
5aabfad6 1158 /* FALL THROUGH */
2ebea0a1
GS		 1159 case OP_NEXTSTATE:
1160 case OP_DBSTATE:
79072805
LW		 1161 case OP_ENTERTRY:
1162 case OP_ENTER:
1163 case OP_SCALAR:
11343788 1164 if (!(o->op_flags & OPf_KIDS))
79072805 1165 break;
54310121 1166 /* FALL THROUGH */
463ee0b2 1167 case OP_SCOPE:
79072805
LW		 1168 case OP_LEAVE:
1169 case OP_LEAVETRY:
a0d0e21e 1170 case OP_LEAVELOOP:
79072805 1171 case OP_LINESEQ:
79072805 1172 case OP_LIST:
11343788 1173 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1174 scalarvoid(kid);
1175 break;
c90c0ff4 1176 case OP_ENTEREVAL:
5196be3e 1177 scalarkids(o);
c90c0ff4 1178 break;
5aabfad6 1179 case OP_REQUIRE:
c90c0ff4 1180 /* all requires must return a boolean value */
5196be3e
MB		 1181 o->op_flags &= ~OPf_WANT;
1182 return scalar(o);
a0d0e21e 1183 case OP_SPLIT:
11343788 1184 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1185 if (!kPMOP->op_pmreplroot)
1186 deprecate("implicit split to @_");
1187 }
1188 break;
79072805 1189 }
d008e5eb
GS		 1190 if (useless) {
1191 dTHR;
1192 if (ckWARN(WARN_VOID))
cea2e8a9 1193 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1194 }
11343788 1195 return o;
79072805
LW		 1196}
1197
1198OP *
864dbfa3 1199Perl_listkids(pTHX_ OP *o)
79072805
LW		 1200{
1201 OP *kid;
11343788
MB		 1202 if (o && o->op_flags & OPf_KIDS) {
1203 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1204 list(kid);
1205 }
11343788 1206 return o;
79072805
LW		 1207}
1208
1209OP *
864dbfa3 1210Perl_list(pTHX_ OP *o)
79072805
LW		 1211{
1212 OP *kid;
1213
a0d0e21e 1214 /* assumes no premature commitment */
3280af22 1215 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1216 || o->op_type == OP_RETURN)
7e363e51 1217 {
11343788 1218 return o;
7e363e51 1219 }
79072805 1220
b162f9ea 1221 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1222 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1223 {
b162f9ea 1224 return o; /* As if inside SASSIGN */
7e363e51 1225 }
b162f9ea 1226
5dc0d613 1227 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1228
11343788 1229 switch (o->op_type) {
79072805
LW		 1230 case OP_FLOP:
1231 case OP_REPEAT:
11343788 1232 list(cBINOPo->op_first);
79072805
LW		 1233 break;
1234 case OP_OR:
1235 case OP_AND:
1236 case OP_COND_EXPR:
11343788 1237 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1238 list(kid);
1239 break;
1240 default:
1241 case OP_MATCH:
8782bef2 1242 case OP_QR:
79072805
LW		 1243 case OP_SUBST:
1244 case OP_NULL:
11343788 1245 if (!(o->op_flags & OPf_KIDS))
79072805 1246 break;
11343788
MB		 1247 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1248 list(cBINOPo->op_first);
1249 return gen_constant_list(o);
79072805
LW		 1250 }
1251 case OP_LIST:
11343788 1252 listkids(o);
79072805
LW		 1253 break;
1254 case OP_LEAVE:
1255 case OP_LEAVETRY:
5dc0d613 1256 kid = cLISTOPo->op_first;
54310121 1257 list(kid);
155aba94 1258 while ((kid = kid->op_sibling)) {
54310121 1259 if (kid->op_sibling)
1260 scalarvoid(kid);
1261 else
1262 list(kid);
1263 }
3280af22 1264 WITH_THR(PL_curcop = &PL_compiling);
54310121 1265 break;
748a9306 1266 case OP_SCOPE:
79072805 1267 case OP_LINESEQ:
11343788 1268 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1269 if (kid->op_sibling)
1270 scalarvoid(kid);
1271 else
1272 list(kid);
1273 }
3280af22 1274 WITH_THR(PL_curcop = &PL_compiling);
79072805 1275 break;
c90c0ff4 1276 case OP_REQUIRE:
1277 /* all requires must return a boolean value */
5196be3e
MB		 1278 o->op_flags &= ~OPf_WANT;
1279 return scalar(o);
79072805 1280 }
11343788 1281 return o;
79072805
LW		 1282}
1283
1284OP *
864dbfa3 1285Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1286{
1287 OP *kid;
1288
11343788
MB		 1289 if (o) {
1290 if (o->op_type == OP_LINESEQ ||
1291 o->op_type == OP_SCOPE ||
1292 o->op_type == OP_LEAVE ||
1293 o->op_type == OP_LEAVETRY)
463ee0b2 1294 {
0f15f207 1295 dTHR;
11343788 1296 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1297 if (kid->op_sibling) {
463ee0b2 1298 scalarvoid(kid);
ed6116ce 1299 }
463ee0b2 1300 }
3280af22 1301 PL_curcop = &PL_compiling;
79072805 1302 }
11343788 1303 o->op_flags &= ~OPf_PARENS;
3280af22 1304 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1305 o->op_flags |= OPf_PARENS;
79072805 1306 }
8990e307 1307 else
11343788
MB		 1308 o = newOP(OP_STUB, 0);
1309 return o;
79072805
LW		 1310}
1311
76e3520e 1312STATIC OP *
cea2e8a9 1313S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1314{
1315 OP *kid;
11343788
MB		 1316 if (o && o->op_flags & OPf_KIDS) {
1317 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1318 mod(kid, type);
79072805 1319 }
11343788 1320 return o;
79072805
LW		 1321}
1322
79072805 1323OP *
864dbfa3 1324Perl_mod(pTHX_ OP *o, I32 type)
79072805 1325{
11343788 1326 dTHR;
79072805 1327 OP *kid;
2d8e6c8d 1328 STRLEN n_a;
79072805 1329
3280af22 1330 if (!o || PL_error_count)
11343788 1331 return o;
79072805 1332
b162f9ea 1333 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1334 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1335 {
b162f9ea 1336 return o;
7e363e51 1337 }
b162f9ea 1338
11343788 1339 switch (o->op_type) {
68dc0745 1340 case OP_UNDEF:
3280af22 1341 PL_modcount++;
5dc0d613 1342 return o;
a0d0e21e 1343 case OP_CONST:
11343788 1344 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1345 goto nomod;
3280af22 1346 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1347 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1348 PL_eval_start = 0;
a0d0e21e
LW		 1349 }
1350 else if (!type) {
3280af22
NIS		 1351 SAVEI32(PL_compiling.cop_arybase);
1352 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1353 }
1354 else if (type == OP_REFGEN)
1355 goto nomod;
1356 else
cea2e8a9 1357 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1358 break;
5f05dabc 1359 case OP_STUB:
5196be3e 1360 if (o->op_flags & OPf_PARENS)
5f05dabc 1361 break;
1362 goto nomod;
a0d0e21e
LW		 1363 case OP_ENTERSUB:
1364 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1365 !(o->op_flags & OPf_STACKED)) {
1366 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1367 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1368 assert(cUNOPo->op_first->op_type == OP_NULL);
1369 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1370 break;
1371 }
cd06dffe
GS		 1372 else { /* lvalue subroutine call */
1373 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1374 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1375 /* Backward compatibility mode: */
1376 o->op_private |= OPpENTERSUB_INARGS;
1377 break;
1378 }
1379 else { /* Compile-time error message: */
1380 OP *kid = cUNOPo->op_first;
1381 CV *cv;
1382 OP *okid;
1383
1384 if (kid->op_type == OP_PUSHMARK)
1385 goto skip_kids;
1386 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1387 Perl_croak(aTHX_
1388 "panic: unexpected lvalue entersub "
1389 "args: type/targ %ld:%ld",
1390 (long)kid->op_type,kid->op_targ);
1391 kid = kLISTOP->op_first;
1392 skip_kids:
1393 while (kid->op_sibling)
1394 kid = kid->op_sibling;
1395 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1396 /* Indirect call */
1397 if (kid->op_type == OP_METHOD_NAMED
1398 || kid->op_type == OP_METHOD)
1399 {
87d7fd28 1400 UNOP *newop;
cd06dffe
GS		 1401
1402 if (kid->op_sibling || kid->op_next != kid) {
1403 yyerror("panic: unexpected optree near method call");
1404 break;
1405 }
1406
87d7fd28 1407 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1408 newop->op_type = OP_RV2CV;
1409 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1410 newop->op_first = Nullop;
1411 newop->op_next = (OP*)newop;
1412 kid->op_sibling = (OP*)newop;
349fd7b7 1413 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1414 break;
1415 }
1416
1417 if (kid->op_type != OP_RV2CV)
1418 Perl_croak(aTHX_
1419 "panic: unexpected lvalue entersub "
1420 "entry via type/targ %ld:%ld",
1421 (long)kid->op_type,kid->op_targ);
1422 kid->op_private |= OPpLVAL_INTRO;
1423 break; /* Postpone until runtime */
1424 }
1425
1426 okid = kid;
1427 kid = kUNOP->op_first;
1428 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1429 kid = kUNOP->op_first;
1430 if (kid->op_type == OP_NULL)
1431 Perl_croak(aTHX_
1432 "Unexpected constant lvalue entersub "
1433 "entry via type/targ %ld:%ld",
1434 (long)kid->op_type,kid->op_targ);
1435 if (kid->op_type != OP_GV) {
1436 /* Restore RV2CV to check lvalueness */
1437 restore_2cv:
1438 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1439 okid->op_next = kid->op_next;
1440 kid->op_next = okid;
1441 }
1442 else
1443 okid->op_next = Nullop;
1444 okid->op_type = OP_RV2CV;
1445 okid->op_targ = 0;
1446 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1447 okid->op_private |= OPpLVAL_INTRO;
1448 break;
1449 }
1450
638eceb6 1451 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1452 if (!cv)
1453 goto restore_2cv;
1454 if (CvLVALUE(cv))
1455 break;
1456 }
1457 }
79072805
LW		 1458 /* FALL THROUGH */
1459 default:
a0d0e21e
LW		 1460 nomod:
1461 /* grep, foreach, subcalls, refgen */
1462 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1463 break;
cea2e8a9 1464 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1465 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1466 ? "do block"
1467 : (o->op_type == OP_ENTERSUB
1468 ? "non-lvalue subroutine call"
1469 : PL_op_desc[o->op_type])),
22c35a8c 1470 type ? PL_op_desc[type] : "local"));
11343788 1471 return o;
79072805 1472
a0d0e21e
LW		 1473 case OP_PREINC:
1474 case OP_PREDEC:
1475 case OP_POW:
1476 case OP_MULTIPLY:
1477 case OP_DIVIDE:
1478 case OP_MODULO:
1479 case OP_REPEAT:
1480 case OP_ADD:
1481 case OP_SUBTRACT:
1482 case OP_CONCAT:
1483 case OP_LEFT_SHIFT:
1484 case OP_RIGHT_SHIFT:
1485 case OP_BIT_AND:
1486 case OP_BIT_XOR:
1487 case OP_BIT_OR:
1488 case OP_I_MULTIPLY:
1489 case OP_I_DIVIDE:
1490 case OP_I_MODULO:
1491 case OP_I_ADD:
1492 case OP_I_SUBTRACT:
11343788 1493 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1494 goto nomod;
3280af22 1495 PL_modcount++;
a0d0e21e
LW		 1496 break;
1497
79072805 1498 case OP_COND_EXPR:
11343788 1499 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1500 mod(kid, type);
79072805
LW		 1501 break;
1502
1503 case OP_RV2AV:
1504 case OP_RV2HV:
93af7a87 1505 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1506 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1507 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1508 PL_modcount = 10000;
11343788 1509 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1510 }
1511 /* FALL THROUGH */
79072805 1512 case OP_RV2GV:
5dc0d613 1513 if (scalar_mod_type(o, type))
3fe9a6f1 1514 goto nomod;
11343788 1515 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1516 /* FALL THROUGH */
1517 case OP_AASSIGN:
1518 case OP_ASLICE:
1519 case OP_HSLICE:
93a17b20
LW		 1520 case OP_NEXTSTATE:
1521 case OP_DBSTATE:
a0d0e21e
LW		 1522 case OP_REFGEN:
1523 case OP_CHOMP:
3280af22 1524 PL_modcount = 10000;
79072805 1525 break;
463ee0b2 1526 case OP_RV2SV:
11343788 1527 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1528 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1529 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1530 /* FALL THROUGH */
79072805 1531 case OP_GV:
463ee0b2 1532 case OP_AV2ARYLEN:
3280af22 1533 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1534 case OP_SASSIGN:
bf4b1e52
GS		 1535 case OP_ANDASSIGN:
1536 case OP_ORASSIGN:
8990e307 1537 case OP_AELEMFAST:
3280af22 1538 PL_modcount++;
8990e307
LW		 1539 break;
1540
748a9306
LW		 1541 case OP_PADAV:
1542 case OP_PADHV:
3280af22 1543 PL_modcount = 10000;
5196be3e
MB		 1544 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1545 return o; /* Treat \(@foo) like ordinary list. */
1546 if (scalar_mod_type(o, type))
3fe9a6f1 1547 goto nomod;
748a9306
LW		 1548 /* FALL THROUGH */
1549 case OP_PADSV:
3280af22 1550 PL_modcount++;
748a9306 1551 if (!type)
cea2e8a9 1552 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1553 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1554 break;
1555
554b3eca 1556#ifdef USE_THREADS
2faa37cc 1557 case OP_THREADSV:
533c011a 1558 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1559 break;
1560#endif /* USE_THREADS */
1561
748a9306
LW		 1562 case OP_PUSHMARK:
1563 break;
a0d0e21e 1564
69969c6f
SB		 1565 case OP_KEYS:
1566 if (type != OP_SASSIGN)
1567 goto nomod;
5d82c453
GA		 1568 goto lvalue_func;
1569 case OP_SUBSTR:
1570 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1571 goto nomod;
5f05dabc 1572 /* FALL THROUGH */
a0d0e21e 1573 case OP_POS:
463ee0b2 1574 case OP_VEC:
5d82c453 1575 lvalue_func:
11343788
MB		 1576 pad_free(o->op_targ);
1577 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1578 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1579 if (o->op_flags & OPf_KIDS)
1580 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1581 break;
a0d0e21e 1582
463ee0b2
LW		 1583 case OP_AELEM:
1584 case OP_HELEM:
11343788 1585 ref(cBINOPo->op_first, o->op_type);
68dc0745 1586 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1587 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1588 o->op_private |= OPpLVAL_DEFER;
3280af22 1589 PL_modcount++;
463ee0b2
LW		 1590 break;
1591
1592 case OP_SCOPE:
1593 case OP_LEAVE:
1594 case OP_ENTER:
11343788
MB		 1595 if (o->op_flags & OPf_KIDS)
1596 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1597 break;
1598
1599 case OP_NULL:
638bc118
GS		 1600 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1601 goto nomod;
1602 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1603 break;
11343788
MB		 1604 if (o->op_targ != OP_LIST) {
1605 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1606 break;
1607 }
1608 /* FALL THROUGH */
463ee0b2 1609 case OP_LIST:
11343788 1610 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1611 mod(kid, type);
1612 break;
1613 }
11343788 1614 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1615
1616 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1617 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1618 else if (!type) {
11343788
MB		 1619 o->op_private |= OPpLVAL_INTRO;
1620 o->op_flags &= ~OPf_SPECIAL;
3280af22 1621 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1622 }
a0d0e21e 1623 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1624 o->op_flags |= OPf_REF;
1625 return o;
463ee0b2
LW		 1626}
1627
864dbfa3 1628STATIC bool
cea2e8a9 1629S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1630{
1631 switch (type) {
1632 case OP_SASSIGN:
5196be3e 1633 if (o->op_type == OP_RV2GV)
3fe9a6f1 1634 return FALSE;
1635 /* FALL THROUGH */
1636 case OP_PREINC:
1637 case OP_PREDEC:
1638 case OP_POSTINC:
1639 case OP_POSTDEC:
1640 case OP_I_PREINC:
1641 case OP_I_PREDEC:
1642 case OP_I_POSTINC:
1643 case OP_I_POSTDEC:
1644 case OP_POW:
1645 case OP_MULTIPLY:
1646 case OP_DIVIDE:
1647 case OP_MODULO:
1648 case OP_REPEAT:
1649 case OP_ADD:
1650 case OP_SUBTRACT:
1651 case OP_I_MULTIPLY:
1652 case OP_I_DIVIDE:
1653 case OP_I_MODULO:
1654 case OP_I_ADD:
1655 case OP_I_SUBTRACT:
1656 case OP_LEFT_SHIFT:
1657 case OP_RIGHT_SHIFT:
1658 case OP_BIT_AND:
1659 case OP_BIT_XOR:
1660 case OP_BIT_OR:
1661 case OP_CONCAT:
1662 case OP_SUBST:
1663 case OP_TRANS:
49e9fbe6
GS		 1664 case OP_READ:
1665 case OP_SYSREAD:
1666 case OP_RECV:
bf4b1e52
GS		 1667 case OP_ANDASSIGN:
1668 case OP_ORASSIGN:
3fe9a6f1 1669 return TRUE;
1670 default:
1671 return FALSE;
1672 }
1673}
1674
35cd451c 1675STATIC bool
cea2e8a9 1676S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1677{
1678 switch (o->op_type) {
1679 case OP_PIPE_OP:
1680 case OP_SOCKPAIR:
1681 if (argnum == 2)
1682 return TRUE;
1683 /* FALL THROUGH */
1684 case OP_SYSOPEN:
1685 case OP_OPEN:
ded8aa31 1686 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1687 case OP_SOCKET:
1688 case OP_OPEN_DIR:
1689 case OP_ACCEPT:
1690 if (argnum == 1)
1691 return TRUE;
1692 /* FALL THROUGH */
1693 default:
1694 return FALSE;
1695 }
1696}
1697
463ee0b2 1698OP *
864dbfa3 1699Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1700{
1701 OP *kid;
11343788
MB		 1702 if (o && o->op_flags & OPf_KIDS) {
1703 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1704 ref(kid, type);
1705 }
11343788 1706 return o;
463ee0b2
LW		 1707}
1708
1709OP *
864dbfa3 1710Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1711{
1712 OP *kid;
463ee0b2 1713
3280af22 1714 if (!o || PL_error_count)
11343788 1715 return o;
463ee0b2 1716
11343788 1717 switch (o->op_type) {
a0d0e21e 1718 case OP_ENTERSUB:
afebc493 1719 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1720 !(o->op_flags & OPf_STACKED)) {
1721 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1722 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1723 assert(cUNOPo->op_first->op_type == OP_NULL);
1724 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1725 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1726 }
1727 break;
aeea060c 1728
463ee0b2 1729 case OP_COND_EXPR:
11343788 1730 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1731 ref(kid, type);
1732 break;
8990e307 1733 case OP_RV2SV:
35cd451c
GS		 1734 if (type == OP_DEFINED)
1735 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1736 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1737 /* FALL THROUGH */
1738 case OP_PADSV:
5f05dabc 1739 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1740 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1741 : type == OP_RV2HV ? OPpDEREF_HV
1742 : OPpDEREF_SV);
11343788 1743 o->op_flags |= OPf_MOD;
a0d0e21e 1744 }
8990e307
LW		 1745 break;
1746
2faa37cc 1747 case OP_THREADSV:
a863c7d1
MB		 1748 o->op_flags |= OPf_MOD; /* XXX ??? */
1749 break;
1750
463ee0b2
LW		 1751 case OP_RV2AV:
1752 case OP_RV2HV:
aeea060c 1753 o->op_flags |= OPf_REF;
8990e307 1754 /* FALL THROUGH */
463ee0b2 1755 case OP_RV2GV:
35cd451c
GS		 1756 if (type == OP_DEFINED)
1757 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1758 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1759 break;
8990e307 1760
463ee0b2
LW		 1761 case OP_PADAV:
1762 case OP_PADHV:
aeea060c 1763 o->op_flags |= OPf_REF;
79072805 1764 break;
aeea060c 1765
8990e307 1766 case OP_SCALAR:
79072805 1767 case OP_NULL:
11343788 1768 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1769 break;
11343788 1770 ref(cBINOPo->op_first, type);
79072805
LW		 1771 break;
1772 case OP_AELEM:
1773 case OP_HELEM:
11343788 1774 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1775 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1776 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1777 : type == OP_RV2HV ? OPpDEREF_HV
1778 : OPpDEREF_SV);
11343788 1779 o->op_flags |= OPf_MOD;
8990e307 1780 }
79072805
LW		 1781 break;
1782
463ee0b2 1783 case OP_SCOPE:
79072805
LW		 1784 case OP_LEAVE:
1785 case OP_ENTER:
8990e307 1786 case OP_LIST:
11343788 1787 if (!(o->op_flags & OPf_KIDS))
79072805 1788 break;
11343788 1789 ref(cLISTOPo->op_last, type);
79072805 1790 break;
a0d0e21e
LW		 1791 default:
1792 break;
79072805 1793 }
11343788 1794 return scalar(o);
8990e307 1795
79072805
LW		 1796}
1797
09bef843
SB		 1798STATIC OP *
1799S_dup_attrlist(pTHX_ OP *o)
1800{
1801 OP *rop = Nullop;
1802
1803 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1804 * where the first kid is OP_PUSHMARK and the remaining ones
1805 * are OP_CONST. We need to push the OP_CONST values.
1806 */
1807 if (o->op_type == OP_CONST)
1808 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1809 else {
1810 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1811 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1812 if (o->op_type == OP_CONST)
1813 rop = append_elem(OP_LIST, rop,
1814 newSVOP(OP_CONST, o->op_flags,
1815 SvREFCNT_inc(cSVOPo->op_sv)));
1816 }
1817 }
1818 return rop;
1819}
1820
1821STATIC void
1822S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1823{
09bef843
SB		 1824 SV *stashsv;
1825
1826 /* fake up C<use attributes $pkg,$rv,@attrs> */
1827 ENTER; /* need to protect against side-effects of 'use' */
1828 SAVEINT(PL_expect);
1829 if (stash && HvNAME(stash))
1830 stashsv = newSVpv(HvNAME(stash), 0);
1831 else
1832 stashsv = &PL_sv_no;
e4783991 1833
09bef843 1834#define ATTRSMODULE "attributes"
e4783991
GS		 1835
1836 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1837 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1838 Nullsv,
1839 prepend_elem(OP_LIST,
1840 newSVOP(OP_CONST, 0, stashsv),
1841 prepend_elem(OP_LIST,
1842 newSVOP(OP_CONST, 0,
1843 newRV(target)),
1844 dup_attrlist(attrs))));
09bef843
SB		 1845 LEAVE;
1846}
1847
1848STATIC OP *
1849S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1850{
1851 OP *kid;
93a17b20
LW		 1852 I32 type;
1853
3280af22 1854 if (!o || PL_error_count)
11343788 1855 return o;
93a17b20 1856
11343788 1857 type = o->op_type;
93a17b20 1858 if (type == OP_LIST) {
11343788 1859 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1860 my_kid(kid, attrs);
dab48698 1861 } else if (type == OP_UNDEF) {
7766148a 1862 return o;
77ca0c92
LW		 1863 } else if (type == OP_RV2SV || /* "our" declaration */
1864 type == OP_RV2AV ||
1865 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1866 o->op_private |= OPpOUR_INTRO;
77ca0c92 1867 return o;
dab48698 1868 } else if (type != OP_PADSV &&
93a17b20
LW		 1869 type != OP_PADAV &&
1870 type != OP_PADHV &&
1871 type != OP_PUSHMARK)
1872 {
eb64745e
GS		 1873 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1874 PL_op_desc[o->op_type],
1875 PL_in_my == KEY_our ? "our" : "my"));
11343788 1876 return o;
93a17b20 1877 }
09bef843
SB		 1878 else if (attrs && type != OP_PUSHMARK) {
1879 HV *stash;
1880 SV *padsv;
1881 SV **namesvp;
1882
eb64745e
GS		 1883 PL_in_my = FALSE;
1884 PL_in_my_stash = Nullhv;
1885
09bef843
SB		 1886 /* check for C<my Dog $spot> when deciding package */
1887 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1888 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1889 stash = SvSTASH(*namesvp);
1890 else
1891 stash = PL_curstash;
1892 padsv = PAD_SV(o->op_targ);
1893 apply_attrs(stash, padsv, attrs);
1894 }
11343788
MB		 1895 o->op_flags |= OPf_MOD;
1896 o->op_private |= OPpLVAL_INTRO;
1897 return o;
93a17b20
LW		 1898}
1899
1900OP *
09bef843
SB		 1901Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1902{
1903 if (o->op_flags & OPf_PARENS)
1904 list(o);
09bef843
SB		 1905 if (attrs)
1906 SAVEFREEOP(attrs);
eb64745e
GS		 1907 o = my_kid(o, attrs);
1908 PL_in_my = FALSE;
1909 PL_in_my_stash = Nullhv;
1910 return o;
09bef843
SB		 1911}
1912
1913OP *
1914Perl_my(pTHX_ OP *o)
1915{
1916 return my_kid(o, Nullop);
1917}
1918
1919OP *
864dbfa3 1920Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1921{
1922 if (o)
1923 o->op_flags |= OPf_PARENS;
1924 return o;
1925}
1926
1927OP *
864dbfa3 1928Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1929{
d008e5eb 1930 dTHR;
11343788 1931 OP *o;
79072805 1932
e476b1b5 1933 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1934 (left->op_type == OP_RV2AV ||
1935 left->op_type == OP_RV2HV ||
1936 left->op_type == OP_PADAV ||
1937 left->op_type == OP_PADHV)) {
22c35a8c 1938 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1939 right->op_type == OP_TRANS)
1940 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1941 const char *sample = ((left->op_type == OP_RV2AV ||
1942 left->op_type == OP_PADAV)
1943 ? "@array" : "%hash");
e476b1b5 1944 Perl_warner(aTHX_ WARN_MISC,
599cee73
PM		 1945 "Applying %s to %s will act on scalar(%s)",
1946 desc, sample, sample);
2ae324a7 1947 }
1948
79072805
LW		 1949 if (right->op_type == OP_MATCH ||
1950 right->op_type == OP_SUBST ||
1951 right->op_type == OP_TRANS) {
1952 right->op_flags |= OPf_STACKED;
1953 if (right->op_type != OP_MATCH)
463ee0b2 1954 left = mod(left, right->op_type);
79072805 1955 if (right->op_type == OP_TRANS)
11343788 1956 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1957 else
11343788 1958 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1959 if (type == OP_NOT)
11343788
MB		 1960 return newUNOP(OP_NOT, 0, scalar(o));
1961 return o;
79072805
LW		 1962 }
1963 else
1964 return bind_match(type, left,
1965 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1966}
1967
1968OP *
864dbfa3 1969Perl_invert(pTHX_ OP *o)
79072805 1970{
11343788
MB		 1971 if (!o)
1972 return o;
79072805 1973 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1974 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1975}
1976
1977OP *
864dbfa3 1978Perl_scope(pTHX_ OP *o)
79072805
LW		 1979{
1980 if (o) {
3280af22 1981 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1982 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1983 o->op_type = OP_LEAVE;
22c35a8c 1984 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1985 }
1986 else {
1987 if (o->op_type == OP_LINESEQ) {
1988 OP *kid;
1989 o->op_type = OP_SCOPE;
22c35a8c 1990 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1991 kid = ((LISTOP*)o)->op_first;
1992 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1993 null(kid);
463ee0b2
LW		 1994 }
1995 else
748a9306 1996 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1997 }
79072805
LW		 1998 }
1999 return o;
2000}
2001
b3ac6de7 2002void
864dbfa3 2003Perl_save_hints(pTHX)
b3ac6de7 2004{
3280af22
NIS		 2005 SAVEI32(PL_hints);
2006 SAVESPTR(GvHV(PL_hintgv));
2007 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2008 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2009}
2010
a0d0e21e 2011int
864dbfa3 2012Perl_block_start(pTHX_ int full)
79072805 2013{
11343788 2014 dTHR;
3280af22 2015 int retval = PL_savestack_ix;
b3ac6de7 2016
3280af22 2017 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2018 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2019 if (full)
2020 PL_comppad_name_fill = PL_comppad_name_floor;
2021 if (PL_comppad_name_floor < 0)
2022 PL_comppad_name_floor = 0;
3280af22
NIS		 2023 SAVEI32(PL_min_intro_pending);
2024 SAVEI32(PL_max_intro_pending);
2025 PL_min_intro_pending = 0;
2026 SAVEI32(PL_comppad_name_fill);
2027 SAVEI32(PL_padix_floor);
2028 PL_padix_floor = PL_padix;
2029 PL_pad_reset_pending = FALSE;
b3ac6de7 2030 SAVEHINTS();
3280af22 2031 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2032 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2033 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2034 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2035 SAVEFREESV(PL_compiling.cop_warnings) ;
2036 }
a0d0e21e
LW		 2037 return retval;
2038}
2039
2040OP*
864dbfa3 2041Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2042{
11343788 2043 dTHR;
3280af22 2044 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2045 OP* retval = scalarseq(seq);
a0d0e21e 2046 LEAVE_SCOPE(floor);
3280af22 2047 PL_pad_reset_pending = FALSE;
e24b16f9 2048 PL_compiling.op_private = PL_hints;
a0d0e21e 2049 if (needblockscope)
3280af22
NIS		 2050 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2051 pad_leavemy(PL_comppad_name_fill);
2052 PL_cop_seqmax++;
a0d0e21e
LW		 2053 return retval;
2054}
2055
76e3520e 2056STATIC OP *
cea2e8a9 2057S_newDEFSVOP(pTHX)
54b9620d
MB		 2058{
2059#ifdef USE_THREADS
2060 OP *o = newOP(OP_THREADSV, 0);
2061 o->op_targ = find_threadsv("_");
2062 return o;
2063#else
3280af22 2064 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2065#endif /* USE_THREADS */
2066}
2067
a0d0e21e 2068void
864dbfa3 2069Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2070{
11343788 2071 dTHR;
3280af22 2072 if (PL_in_eval) {
b295d113
TH		 2073 if (PL_eval_root)
2074 return;
faef0170
HS		 2075 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2076 ((PL_in_eval & EVAL_KEEPERR)
2077 ? OPf_SPECIAL : 0), o);
3280af22 2078 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2079 PL_eval_root->op_private |= OPpREFCOUNTED;
2080 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2081 PL_eval_root->op_next = 0;
2082 peep(PL_eval_start);
a0d0e21e
LW		 2083 }
2084 else {
5dc0d613 2085 if (!o)
a0d0e21e 2086 return;
3280af22
NIS		 2087 PL_main_root = scope(sawparens(scalarvoid(o)));
2088 PL_curcop = &PL_compiling;
2089 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2090 PL_main_root->op_private |= OPpREFCOUNTED;
2091 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2092 PL_main_root->op_next = 0;
2093 peep(PL_main_start);
2094 PL_compcv = 0;
3841441e 2095
4fdae800 2096 /* Register with debugger */
84902520 2097 if (PERLDB_INTER) {
864dbfa3 2098 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2099 if (cv) {
2100 dSP;
924508f0 2101 PUSHMARK(SP);
cc49e20b 2102 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2103 PUTBACK;
864dbfa3 2104 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2105 }
2106 }
79072805 2107 }
79072805
LW		 2108}
2109
2110OP *
864dbfa3 2111Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2112{
2113 if (o->op_flags & OPf_PARENS)
2114 list(o);
8990e307 2115 else {
d008e5eb 2116 dTHR;
599cee73 2117 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2118 char *s;
834a4ddd 2119 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2120 if (*s == ';' || *s == '=')
eb64745e
GS		 2121 Perl_warner(aTHX_ WARN_PARENTHESIS,
2122 "Parentheses missing around \"%s\" list",
2123 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2124 }
2125 }
93a17b20 2126 if (lex)
eb64745e 2127 o = my(o);
93a17b20 2128 else
eb64745e
GS		 2129 o = mod(o, OP_NULL); /* a bit kludgey */
2130 PL_in_my = FALSE;
2131 PL_in_my_stash = Nullhv;
2132 return o;
79072805
LW		 2133}
2134
2135OP *
864dbfa3 2136Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2137{
2138 if (o->op_type == OP_LIST) {
554b3eca
MB		 2139 OP *o2;
2140#ifdef USE_THREADS
2faa37cc 2141 o2 = newOP(OP_THREADSV, 0);
54b9620d 2142 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2143#else
2144 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2145#endif /* USE_THREADS */
2146 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2147 }
2148 return o;
2149}
2150
2151OP *
864dbfa3 2152Perl_fold_constants(pTHX_ register OP *o)
79072805 2153{
11343788 2154 dTHR;
79072805
LW		 2155 register OP *curop;
2156 I32 type = o->op_type;
748a9306 2157 SV *sv;
79072805 2158
22c35a8c 2159 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2160 scalar(o);
b162f9ea 2161 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2162 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2163
eac055e9
GS		 2164 /* integerize op, unless it happens to be C<-foo>.
2165 * XXX should pp_i_negate() do magic string negation instead? */
2166 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2167 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2168 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2169 {
22c35a8c 2170 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2171 }
85e6fe83 2172
22c35a8c 2173 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2174 goto nope;
2175
de939608 2176 switch (type) {
7a52d87a
GS		 2177 case OP_NEGATE:
2178 /* XXX might want a ck_negate() for this */
2179 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2180 break;
de939608
CS		 2181 case OP_SPRINTF:
2182 case OP_UCFIRST:
2183 case OP_LCFIRST:
2184 case OP_UC:
2185 case OP_LC:
69dcf70c
MB		 2186 case OP_SLT:
2187 case OP_SGT:
2188 case OP_SLE:
2189 case OP_SGE:
2190 case OP_SCMP:
2191
de939608
CS		 2192 if (o->op_private & OPpLOCALE)
2193 goto nope;
2194 }
2195
3280af22 2196 if (PL_error_count)
a0d0e21e
LW		 2197 goto nope; /* Don't try to run w/ errors */
2198
79072805 2199 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2200 if ((curop->op_type != OP_CONST ||
2201 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2202 curop->op_type != OP_LIST &&
2203 curop->op_type != OP_SCALAR &&
2204 curop->op_type != OP_NULL &&
2205 curop->op_type != OP_PUSHMARK)
2206 {
79072805
LW		 2207 goto nope;
2208 }
2209 }
2210
2211 curop = LINKLIST(o);
2212 o->op_next = 0;
533c011a 2213 PL_op = curop;
cea2e8a9 2214 CALLRUNOPS(aTHX);
3280af22 2215 sv = *(PL_stack_sp--);
748a9306 2216 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2217 pad_swipe(o->op_targ);
748a9306
LW		 2218 else if (SvTEMP(sv)) { /* grab mortal temp? */
2219 (void)SvREFCNT_inc(sv);
2220 SvTEMP_off(sv);
85e6fe83 2221 }
79072805
LW		 2222 op_free(o);
2223 if (type == OP_RV2GV)
b1cb66bf 2224 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2225 else {
ee580363
GS		 2226 /* try to smush double to int, but don't smush -2.0 to -2 */
2227 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2228 type != OP_NEGATE)
2229 {
748a9306 2230 IV iv = SvIV(sv);
65202027 2231 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2232 SvREFCNT_dec(sv);
2233 sv = newSViv(iv);
2234 }
b1cb66bf 2235 else
2236 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2237 }
2238 return newSVOP(OP_CONST, 0, sv);
2239 }
aeea060c 2240
79072805 2241 nope:
22c35a8c 2242 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2243 return o;
79072805 2244
3280af22 2245 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2246 if (type == OP_MODULO
2247 || type == OP_DIVIDE
2248 || !(o->op_flags & OPf_KIDS))
2249 {
85e6fe83 2250 return o;
4bb9f687 2251 }
85e6fe83
LW		 2252
2253 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2254 if (curop->op_type == OP_CONST) {
b1cb66bf 2255 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2256 continue;
2257 return o;
2258 }
22c35a8c 2259 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2260 continue;
2261 return o;
2262 }
22c35a8c 2263 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2264 }
2265
79072805
LW		 2266 return o;
2267}
2268
2269OP *
864dbfa3 2270Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2271{
11343788 2272 dTHR;
79072805 2273 register OP *curop;
3280af22 2274 I32 oldtmps_floor = PL_tmps_floor;
79072805 2275
a0d0e21e 2276 list(o);
3280af22 2277 if (PL_error_count)
a0d0e21e
LW		 2278 return o; /* Don't attempt to run with errors */
2279
533c011a 2280 PL_op = curop = LINKLIST(o);
a0d0e21e 2281 o->op_next = 0;
7d4045d4 2282 peep(curop);
cea2e8a9
GS		 2283 pp_pushmark();
2284 CALLRUNOPS(aTHX);
533c011a 2285 PL_op = curop;
cea2e8a9 2286 pp_anonlist();
3280af22 2287 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2288
2289 o->op_type = OP_RV2AV;
22c35a8c 2290 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2291 curop = ((UNOP*)o)->op_first;
3280af22 2292 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2293 op_free(curop);
79072805
LW		 2294 linklist(o);
2295 return list(o);
2296}
2297
2298OP *
864dbfa3 2299Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2300{
2301 OP *kid;
a0d0e21e 2302 OP *last = 0;
79072805 2303
11343788
MB		 2304 if (!o || o->op_type != OP_LIST)
2305 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2306 else
5dc0d613 2307 o->op_flags &= ~OPf_WANT;
79072805 2308
22c35a8c 2309 if (!(PL_opargs[type] & OA_MARK))
11343788 2310 null(cLISTOPo->op_first);
8990e307 2311
11343788 2312 o->op_type = type;
22c35a8c 2313 o->op_ppaddr = PL_ppaddr[type];
11343788 2314 o->op_flags |= flags;
79072805 2315
11343788
MB		 2316 o = CHECKOP(type, o);
2317 if (o->op_type != type)
2318 return o;
79072805 2319
11343788 2320 if (cLISTOPo->op_children < 7) {
79072805 2321 /* XXX do we really need to do this if we're done appending?? */
11343788 2322 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2323 last = kid;
11343788 2324 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2325 }
2326
11343788 2327 return fold_constants(o);
79072805
LW		 2328}
2329
2330/* List constructors */
2331
2332OP *
864dbfa3 2333Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2334{
2335 if (!first)
2336 return last;
8990e307
LW		 2337
2338 if (!last)
79072805 2339 return first;
8990e307 2340
155aba94
GS		 2341 if (first->op_type != type
2342 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2343 {
2344 return newLISTOP(type, 0, first, last);
2345 }
79072805 2346
a0d0e21e
LW		 2347 if (first->op_flags & OPf_KIDS)
2348 ((LISTOP*)first)->op_last->op_sibling = last;
2349 else {
2350 first->op_flags |= OPf_KIDS;
2351 ((LISTOP*)first)->op_first = last;
2352 }
2353 ((LISTOP*)first)->op_last = last;
2354 ((LISTOP*)first)->op_children++;
2355 return first;
79072805
LW		 2356}
2357
2358OP *
864dbfa3 2359Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2360{
2361 if (!first)
2362 return (OP*)last;
8990e307
LW		 2363
2364 if (!last)
79072805 2365 return (OP*)first;
8990e307
LW		 2366
2367 if (first->op_type != type)
79072805 2368 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2369
2370 if (last->op_type != type)
79072805
LW		 2371 return append_elem(type, (OP*)first, (OP*)last);
2372
2373 first->op_last->op_sibling = last->op_first;
2374 first->op_last = last->op_last;
2375 first->op_children += last->op_children;
2376 if (first->op_children)
acb74605 2377 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2378
2379#ifdef PL_OP_SLAB_ALLOC
2380#else
2381 Safefree(last);
2382#endif
79072805
LW		 2383 return (OP*)first;
2384}
2385
2386OP *
864dbfa3 2387Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2388{
2389 if (!first)
2390 return last;
8990e307
LW		 2391
2392 if (!last)
79072805 2393 return first;
8990e307
LW		 2394
2395 if (last->op_type == type) {
2396 if (type == OP_LIST) { /* already a PUSHMARK there */
2397 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2398 ((LISTOP*)last)->op_first->op_sibling = first;
2399 }
2400 else {
2401 if (!(last->op_flags & OPf_KIDS)) {
2402 ((LISTOP*)last)->op_last = first;
2403 last->op_flags |= OPf_KIDS;
2404 }
2405 first->op_sibling = ((LISTOP*)last)->op_first;
2406 ((LISTOP*)last)->op_first = first;
79072805 2407 }
79072805
LW		 2408 ((LISTOP*)last)->op_children++;
2409 return last;
2410 }
2411
2412 return newLISTOP(type, 0, first, last);
2413}
2414
2415/* Constructors */
2416
2417OP *
864dbfa3 2418Perl_newNULLLIST(pTHX)
79072805 2419{
8990e307
LW		 2420 return newOP(OP_STUB, 0);
2421}
2422
2423OP *
864dbfa3 2424Perl_force_list(pTHX_ OP *o)
8990e307 2425{
11343788
MB		 2426 if (!o || o->op_type != OP_LIST)
2427 o = newLISTOP(OP_LIST, 0, o, Nullop);
2428 null(o);
2429 return o;
79072805
LW		 2430}
2431
2432OP *
864dbfa3 2433Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2434{
2435 LISTOP *listop;
2436
b7dc083c 2437 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2438
2439 listop->op_type = type;
22c35a8c 2440 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2441 listop->op_children = (first != 0) + (last != 0);
2442 listop->op_flags = flags;
79072805
LW		 2443
2444 if (!last && first)
2445 last = first;
2446 else if (!first && last)
2447 first = last;
8990e307
LW		 2448 else if (first)
2449 first->op_sibling = last;
79072805
LW		 2450 listop->op_first = first;
2451 listop->op_last = last;
8990e307
LW		 2452 if (type == OP_LIST) {
2453 OP* pushop;
2454 pushop = newOP(OP_PUSHMARK, 0);
2455 pushop->op_sibling = first;
2456 listop->op_first = pushop;
2457 listop->op_flags |= OPf_KIDS;
2458 if (!last)
2459 listop->op_last = pushop;
2460 }
2461 else if (listop->op_children)
2462 listop->op_flags |= OPf_KIDS;
79072805
LW		 2463
2464 return (OP*)listop;
2465}
2466
2467OP *
864dbfa3 2468Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2469{
11343788 2470 OP *o;
b7dc083c 2471 NewOp(1101, o, 1, OP);
11343788 2472 o->op_type = type;
22c35a8c 2473 o->op_ppaddr = PL_ppaddr[type];
11343788 2474 o->op_flags = flags;
79072805 2475
11343788
MB		 2476 o->op_next = o;
2477 o->op_private = 0 + (flags >> 8);
22c35a8c 2478 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2479 scalar(o);
22c35a8c 2480 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2481 o->op_targ = pad_alloc(type, SVs_PADTMP);
2482 return CHECKOP(type, o);
79072805
LW		 2483}
2484
2485OP *
864dbfa3 2486Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2487{
2488 UNOP *unop;
2489
93a17b20 2490 if (!first)
aeea060c 2491 first = newOP(OP_STUB, 0);
22c35a8c 2492 if (PL_opargs[type] & OA_MARK)
8990e307 2493 first = force_list(first);
93a17b20 2494
b7dc083c 2495 NewOp(1101, unop, 1, UNOP);
79072805 2496 unop->op_type = type;
22c35a8c 2497 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2498 unop->op_first = first;
2499 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2500 unop->op_private = 1 | (flags >> 8);
e50aee73 2501 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2502 if (unop->op_next)
2503 return (OP*)unop;
2504
a0d0e21e 2505 return fold_constants((OP *) unop);
79072805
LW		 2506}
2507
2508OP *
864dbfa3 2509Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2510{
2511 BINOP *binop;
b7dc083c 2512 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2513
2514 if (!first)
2515 first = newOP(OP_NULL, 0);
2516
2517 binop->op_type = type;
22c35a8c 2518 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2519 binop->op_first = first;
2520 binop->op_flags = flags | OPf_KIDS;
2521 if (!last) {
2522 last = first;
c07a80fd 2523 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2524 }
2525 else {
c07a80fd 2526 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2527 first->op_sibling = last;
2528 }
2529
e50aee73 2530 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2531 if (binop->op_next || binop->op_type != type)
79072805
LW		 2532 return (OP*)binop;
2533
7284ab6f 2534 binop->op_last = binop->op_first->op_sibling;
79072805 2535
a0d0e21e 2536 return fold_constants((OP *)binop);
79072805
LW		 2537}
2538
a0ed51b3
LW		 2539static int
2540utf8compare(const void *a, const void *b)
2541{
2542 int i;
2543 for (i = 0; i < 10; i++) {
2544 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2545 return -1;
2546 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2547 return 1;
2548 }
2549 return 0;
2550}
2551
79072805 2552OP *
864dbfa3 2553Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2554{
79072805
LW		 2555 SV *tstr = ((SVOP*)expr)->op_sv;
2556 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2557 STRLEN tlen;
2558 STRLEN rlen;
ec49126f 2559 register U8 *t = (U8*)SvPV(tstr, tlen);
2560 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2561 register I32 i;
2562 register I32 j;
a0ed51b3 2563 I32 del;
79072805 2564 I32 complement;
5d06d08e 2565 I32 squash;
79072805
LW		 2566 register short *tbl;
2567
11343788 2568 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2569 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2570 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2571
a0ed51b3 2572 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2573 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2574 SV* transv = 0;
2575 U8* tend = t + tlen;
2576 U8* rend = r + rlen;
2577 I32 ulen;
2578 U32 tfirst = 1;
2579 U32 tlast = 0;
2580 I32 tdiff;
2581 U32 rfirst = 1;
2582 U32 rlast = 0;
2583 I32 rdiff;
2584 I32 diff;
2585 I32 none = 0;
2586 U32 max = 0;
2587 I32 bits;
2588 I32 grows = 0;
2589 I32 havefinal = 0;
2590 U32 final;
a0ed51b3
LW		 2591 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2592 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2593
2594 if (complement) {
806e7201 2595 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3
LW		 2596 U8** cp;
2597 UV nextmin = 0;
2598 New(1109, cp, tlen, U8*);
2599 i = 0;
79cb57f6 2600 transv = newSVpvn("",0);
a0ed51b3
LW		 2601 while (t < tend) {
2602 cp[i++] = t;
2603 t += UTF8SKIP(t);
2604 if (*t == 0xff) {
2605 t++;
2606 t += UTF8SKIP(t);
2607 }
2608 }
2609 qsort(cp, i, sizeof(U8*), utf8compare);
2610 for (j = 0; j < i; j++) {
2611 U8 *s = cp[j];
2612 UV val = utf8_to_uv(s, &ulen);
2613 s += ulen;
2614 diff = val - nextmin;
2615 if (diff > 0) {
2616 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2617 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2618 if (diff > 1) {
2619 t = uv_to_utf8(tmpbuf, val - 1);
2620 sv_catpvn(transv, "\377", 1);
dfe13c55 2621 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2622 }
2623 }
2624 if (*s == 0xff)
2625 val = utf8_to_uv(s+1, &ulen);
2626 if (val >= nextmin)
2627 nextmin = val + 1;
2628 }
2629 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2630 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2631 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2632 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2633 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2634 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2635 tlen = SvCUR(transv);
2636 tend = t + tlen;
2637 }
2638 else if (!rlen && !del) {
2639 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2640 }
2641 if (!squash) {
2642 if (to_utf && from_utf) { /* only counting characters */
2643 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2644 o->op_private |= OPpTRANS_IDENTICAL;
2645 }
2646 else { /* straight latin-1 translation */
2647 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2648 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2649 o->op_private |= OPpTRANS_IDENTICAL;
2650 }
a0ed51b3
LW		 2651 }
2652
2653 while (t < tend || tfirst <= tlast) {
2654 /* see if we need more "t" chars */
2655 if (tfirst > tlast) {
2656 tfirst = (I32)utf8_to_uv(t, &ulen);
2657 t += ulen;
2658 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2659 tlast = (I32)utf8_to_uv(++t, &ulen);
2660 t += ulen;
2661 }
2662 else
2663 tlast = tfirst;
2664 }
2665
2666 /* now see if we need more "r" chars */
2667 if (rfirst > rlast) {
2668 if (r < rend) {
2669 rfirst = (I32)utf8_to_uv(r, &ulen);
2670 r += ulen;
2671 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2672 rlast = (I32)utf8_to_uv(++r, &ulen);
2673 r += ulen;
2674 }
2675 else
2676 rlast = rfirst;
2677 }
2678 else {
2679 if (!havefinal++)
2680 final = rlast;
2681 rfirst = rlast = 0xffffffff;
2682 }
2683 }
2684
2685 /* now see which range will peter our first, if either. */
2686 tdiff = tlast - tfirst;
2687 rdiff = rlast - rfirst;
2688
2689 if (tdiff <= rdiff)
2690 diff = tdiff;
2691 else
2692 diff = rdiff;
2693
2694 if (rfirst == 0xffffffff) {
2695 diff = tdiff; /* oops, pretend rdiff is infinite */
2696 if (diff > 0)
894356b3
GS		 2697 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2698 (long)tfirst, (long)tlast);
a0ed51b3 2699 else
894356b3 2700 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2701 }
2702 else {
2703 if (diff > 0)
894356b3
GS		 2704 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2705 (long)tfirst, (long)(tfirst + diff),
2706 (long)rfirst);
a0ed51b3 2707 else
894356b3
GS		 2708 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2709 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2710
2711 if (rfirst + diff > max)
2712 max = rfirst + diff;
2713 rfirst += diff + 1;
2714 if (!grows) {
2715 if (rfirst <= 0x80)
2716 ;
2717 else if (rfirst <= 0x800)
2718 grows |= (tfirst < 0x80);
2719 else if (rfirst <= 0x10000)
2720 grows |= (tfirst < 0x800);
2721 else if (rfirst <= 0x200000)
2722 grows |= (tfirst < 0x10000);
2723 else if (rfirst <= 0x4000000)
2724 grows |= (tfirst < 0x200000);
2725 else if (rfirst <= 0x80000000)
2726 grows |= (tfirst < 0x4000000);
2727 }
2728 }
2729 tfirst += diff + 1;
2730 }
2731
2732 none = ++max;
2733 if (del)
2734 del = ++max;
2735
2736 if (max > 0xffff)
2737 bits = 32;
2738 else if (max > 0xff)
2739 bits = 16;
2740 else
2741 bits = 8;
2742
2743 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2744 SvREFCNT_dec(listsv);
2745 if (transv)
2746 SvREFCNT_dec(transv);
2747
2748 if (!del && havefinal)
b448e4fe
JH		 2749 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2750 newSVuv((UV)final), 0);
a0ed51b3
LW		 2751
2752 if (grows && to_utf)
2753 o->op_private |= OPpTRANS_GROWS;
2754
2755 op_free(expr);
2756 op_free(repl);
2757 return o;
2758 }
2759
2760 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2761 if (complement) {
2762 Zero(tbl, 256, short);
2763 for (i = 0; i < tlen; i++)
ec49126f 2764 tbl[t[i]] = -1;
79072805
LW		 2765 for (i = 0, j = 0; i < 256; i++) {
2766 if (!tbl[i]) {
2767 if (j >= rlen) {
a0ed51b3 2768 if (del)
79072805
LW		 2769 tbl[i] = -2;
2770 else if (rlen)
ec49126f 2771 tbl[i] = r[j-1];
79072805
LW		 2772 else
2773 tbl[i] = i;
2774 }
2775 else
ec49126f 2776 tbl[i] = r[j++];
79072805
LW		 2777 }
2778 }
2779 }
2780 else {
a0ed51b3 2781 if (!rlen && !del) {
79072805 2782 r = t; rlen = tlen;
5d06d08e 2783 if (!squash)
4757a243 2784 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2785 }
2786 for (i = 0; i < 256; i++)
2787 tbl[i] = -1;
2788 for (i = 0, j = 0; i < tlen; i++,j++) {
2789 if (j >= rlen) {
a0ed51b3 2790 if (del) {
ec49126f 2791 if (tbl[t[i]] == -1)
2792 tbl[t[i]] = -2;
79072805
LW		 2793 continue;
2794 }
2795 --j;
2796 }
ec49126f 2797 if (tbl[t[i]] == -1)
2798 tbl[t[i]] = r[j];
79072805
LW		 2799 }
2800 }
2801 op_free(expr);
2802 op_free(repl);
2803
11343788 2804 return o;
79072805
LW		 2805}
2806
2807OP *
864dbfa3 2808Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2809{
11343788 2810 dTHR;
79072805
LW		 2811 PMOP *pmop;
2812
b7dc083c 2813 NewOp(1101, pmop, 1, PMOP);
79072805 2814 pmop->op_type = type;
22c35a8c 2815 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2816 pmop->op_flags = flags;
c07a80fd 2817 pmop->op_private = 0 | (flags >> 8);
79072805 2818
3280af22 2819 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2820 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2821 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2822 pmop->op_pmpermflags |= PMf_LOCALE;
2823 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2824
79072805 2825 /* link into pm list */
3280af22
NIS		 2826 if (type != OP_TRANS && PL_curstash) {
2827 pmop->op_pmnext = HvPMROOT(PL_curstash);
2828 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2829 }
2830
2831 return (OP*)pmop;
2832}
2833
2834OP *
864dbfa3 2835Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2836{
5c0ca799 2837 dTHR;
79072805
LW		 2838 PMOP *pm;
2839 LOGOP *rcop;
ce862d02 2840 I32 repl_has_vars = 0;
79072805 2841
11343788
MB		 2842 if (o->op_type == OP_TRANS)
2843 return pmtrans(o, expr, repl);
79072805 2844
3280af22 2845 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2846 pm = (PMOP*)o;
79072805
LW		 2847
2848 if (expr->op_type == OP_CONST) {
463ee0b2 2849 STRLEN plen;
79072805 2850 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2851 char *p = SvPV(pat, plen);
11343788 2852 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2853 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2854 p = SvPV(pat, plen);
79072805
LW		 2855 pm->op_pmflags |= PMf_SKIPWHITE;
2856 }
393fec97 2857 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2858 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2859 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2860 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2861 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2862 op_free(expr);
2863 }
2864 else {
393fec97
GS		 2865 if (PL_hints & HINT_UTF8)
2866 pm->op_pmdynflags |= PMdf_UTF8;
3280af22
NIS		 2867 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2868 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2869 ? OP_REGCRESET
2870 : OP_REGCMAYBE),0,expr);
463ee0b2 2871
b7dc083c 2872 NewOp(1101, rcop, 1, LOGOP);
79072805 2873 rcop->op_type = OP_REGCOMP;
22c35a8c 2874 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2875 rcop->op_first = scalar(expr);
3280af22 2876 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2877 ? (OPf_SPECIAL | OPf_KIDS)
2878 : OPf_KIDS);
79072805 2879 rcop->op_private = 1;
11343788 2880 rcop->op_other = o;
79072805
LW		 2881
2882 /* establish postfix order */
3280af22 2883 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2884 LINKLIST(expr);
2885 rcop->op_next = expr;
2886 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2887 }
2888 else {
2889 rcop->op_next = LINKLIST(expr);
2890 expr->op_next = (OP*)rcop;
2891 }
79072805 2892
11343788 2893 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2894 }
2895
2896 if (repl) {
748a9306 2897 OP *curop;
0244c3a4 2898 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2899 curop = 0;
57843af0
GS		 2900 if (CopLINE(PL_curcop) < PL_multi_end)
2901 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2902 }
554b3eca 2903#ifdef USE_THREADS
2faa37cc 2904 else if (repl->op_type == OP_THREADSV
554b3eca 2905 && strchr("&`'123456789+",
533c011a 2906 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2907 {
2908 curop = 0;
2909 }
2910#endif /* USE_THREADS */
748a9306
LW		 2911 else if (repl->op_type == OP_CONST)
2912 curop = repl;
79072805 2913 else {
79072805
LW		 2914 OP *lastop = 0;
2915 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2916 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2917#ifdef USE_THREADS
ce862d02
IZ		 2918 if (curop->op_type == OP_THREADSV) {
2919 repl_has_vars = 1;
be949f6f 2920 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2921 break;
554b3eca
MB		 2922 }
2923#else
79072805 2924 if (curop->op_type == OP_GV) {
638eceb6 2925 GV *gv = cGVOPx_gv(curop);
ce862d02 2926 repl_has_vars = 1;
93a17b20 2927 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2928 break;
2929 }
554b3eca 2930#endif /* USE_THREADS */
79072805
LW		 2931 else if (curop->op_type == OP_RV2CV)
2932 break;
2933 else if (curop->op_type == OP_RV2SV ||
2934 curop->op_type == OP_RV2AV ||
2935 curop->op_type == OP_RV2HV ||
2936 curop->op_type == OP_RV2GV) {
2937 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2938 break;
2939 }
748a9306
LW		 2940 else if (curop->op_type == OP_PADSV ||
2941 curop->op_type == OP_PADAV ||
2942 curop->op_type == OP_PADHV ||
554b3eca 2943 curop->op_type == OP_PADANY) {
ce862d02 2944 repl_has_vars = 1;
748a9306 2945 }
1167e5da
SM		 2946 else if (curop->op_type == OP_PUSHRE)
2947 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2948 else
2949 break;
2950 }
2951 lastop = curop;
2952 }
748a9306 2953 }
ce862d02
IZ		 2954 if (curop == repl
2955 && !(repl_has_vars
2956 && (!pm->op_pmregexp
2957 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2958 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2959 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2960 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2961 }
2962 else {
ce862d02
IZ		 2963 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2964 pm->op_pmflags |= PMf_MAYBE_CONST;
2965 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2966 }
b7dc083c 2967 NewOp(1101, rcop, 1, LOGOP);
748a9306 2968 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2969 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2970 rcop->op_first = scalar(repl);
2971 rcop->op_flags |= OPf_KIDS;
2972 rcop->op_private = 1;
11343788 2973 rcop->op_other = o;
748a9306
LW		 2974
2975 /* establish postfix order */
2976 rcop->op_next = LINKLIST(repl);
2977 repl->op_next = (OP*)rcop;
2978
2979 pm->op_pmreplroot = scalar((OP*)rcop);
2980 pm->op_pmreplstart = LINKLIST(rcop);
2981 rcop->op_next = 0;
79072805
LW		 2982 }
2983 }
2984
2985 return (OP*)pm;
2986}
2987
2988OP *
864dbfa3 2989Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2990{
2991 SVOP *svop;
b7dc083c 2992 NewOp(1101, svop, 1, SVOP);
79072805 2993 svop->op_type = type;
22c35a8c 2994 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2995 svop->op_sv = sv;
2996 svop->op_next = (OP*)svop;
2997 svop->op_flags = flags;
22c35a8c 2998 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2999 scalar((OP*)svop);
22c35a8c 3000 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3001 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3002 return CHECKOP(type, svop);
79072805
LW		 3003}
3004
3005OP *
350de78d
GS		 3006Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3007{
3008 PADOP *padop;
3009 NewOp(1101, padop, 1, PADOP);
3010 padop->op_type = type;
3011 padop->op_ppaddr = PL_ppaddr[type];
3012 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3013 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3014 PL_curpad[padop->op_padix] = sv;
7766f137 3015 SvPADTMP_on(sv);
350de78d
GS		 3016 padop->op_next = (OP*)padop;
3017 padop->op_flags = flags;
3018 if (PL_opargs[type] & OA_RETSCALAR)
3019 scalar((OP*)padop);
3020 if (PL_opargs[type] & OA_TARGET)
3021 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3022 return CHECKOP(type, padop);
3023}
3024
3025OP *
864dbfa3 3026Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3027{
11343788 3028 dTHR;
350de78d 3029#ifdef USE_ITHREADS
743e66e6 3030 GvIN_PAD_on(gv);
350de78d
GS		 3031 return newPADOP(type, flags, SvREFCNT_inc(gv));
3032#else
7934575e 3033 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3034#endif
79072805
LW		 3035}
3036
3037OP *
864dbfa3 3038Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3039{
3040 PVOP *pvop;
b7dc083c 3041 NewOp(1101, pvop, 1, PVOP);
79072805 3042 pvop->op_type = type;
22c35a8c 3043 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3044 pvop->op_pv = pv;
3045 pvop->op_next = (OP*)pvop;
3046 pvop->op_flags = flags;
22c35a8c 3047 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3048 scalar((OP*)pvop);
22c35a8c 3049 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3050 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3051 return CHECKOP(type, pvop);
79072805
LW		 3052}
3053
79072805 3054void
864dbfa3 3055Perl_package(pTHX_ OP *o)
79072805 3056{
11343788 3057 dTHR;
93a17b20 3058 SV *sv;
79072805 3059
3280af22
NIS		 3060 save_hptr(&PL_curstash);
3061 save_item(PL_curstname);
11343788 3062 if (o) {
463ee0b2
LW		 3063 STRLEN len;
3064 char *name;
11343788 3065 sv = cSVOPo->op_sv;
463ee0b2 3066 name = SvPV(sv, len);
3280af22
NIS		 3067 PL_curstash = gv_stashpvn(name,len,TRUE);
3068 sv_setpvn(PL_curstname, name, len);
11343788 3069 op_free(o);
93a17b20
LW		 3070 }
3071 else {
3280af22
NIS		 3072 sv_setpv(PL_curstname,"<none>");
3073 PL_curstash = Nullhv;
93a17b20 3074 }
7ad382f4 3075 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3076 PL_copline = NOLINE;
3077 PL_expect = XSTATE;
79072805
LW		 3078}
3079
85e6fe83 3080void
864dbfa3 3081Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3082{
a0d0e21e 3083 OP *pack;
a0d0e21e
LW		 3084 OP *rqop;
3085 OP *imop;
b1cb66bf 3086 OP *veop;
78ca652e 3087 GV *gv;
85e6fe83 3088
a0d0e21e 3089 if (id->op_type != OP_CONST)
cea2e8a9 3090 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3091
b1cb66bf 3092 veop = Nullop;
3093
0f79a09d 3094 if (version != Nullop) {
b1cb66bf 3095 SV *vesv = ((SVOP*)version)->op_sv;
3096
44dcb63b 3097 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3098 arg = version;
3099 }
3100 else {
3101 OP *pack;
0f79a09d 3102 SV *meth;
b1cb66bf 3103
44dcb63b 3104 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3105 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3106
3107 /* Make copy of id so we don't free it twice */
3108 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3109
3110 /* Fake up a method call to VERSION */
0f79a09d
GS		 3111 meth = newSVpvn("VERSION",7);
3112 sv_upgrade(meth, SVt_PVIV);
155aba94 3113 (void)SvIOK_on(meth);
0f79a09d 3114 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3115 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3116 append_elem(OP_LIST,
0f79a09d
GS		 3117 prepend_elem(OP_LIST, pack, list(version)),
3118 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3119 }
3120 }
aeea060c 3121
a0d0e21e 3122 /* Fake up an import/unimport */
4633a7c4
LW		 3123 if (arg && arg->op_type == OP_STUB)
3124 imop = arg; /* no import on explicit () */
44dcb63b 3125 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3126 imop = Nullop; /* use 5.0; */
3127 }
4633a7c4 3128 else {
0f79a09d
GS		 3129 SV *meth;
3130
4633a7c4
LW		 3131 /* Make copy of id so we don't free it twice */
3132 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3133
3134 /* Fake up a method call to import/unimport */
3135 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3136 sv_upgrade(meth, SVt_PVIV);
155aba94 3137 (void)SvIOK_on(meth);
0f79a09d 3138 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3139 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3140 append_elem(OP_LIST,
3141 prepend_elem(OP_LIST, pack, list(arg)),
3142 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3143 }
3144
78ca652e
GS		 3145 /* Fake up a require, handle override, if any */
3146 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3147 if (!(gv && GvIMPORTED_CV(gv)))
3148 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3149
3150 if (gv && GvIMPORTED_CV(gv)) {
3151 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3152 append_elem(OP_LIST, id,
3153 scalar(newUNOP(OP_RV2CV, 0,
3154 newGVOP(OP_GV, 0,
3155 gv))))));
3156 }
3157 else {
3158 rqop = newUNOP(OP_REQUIRE, 0, id);
3159 }
a0d0e21e
LW		 3160
3161 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3162 newATTRSUB(floor,
79cb57f6 3163 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3164 Nullop,
09bef843 3165 Nullop,
a0d0e21e 3166 append_elem(OP_LINESEQ,
b1cb66bf 3167 append_elem(OP_LINESEQ,
3168 newSTATEOP(0, Nullch, rqop),
3169 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3170 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3171
c305c6a0 3172 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3173 PL_copline = NOLINE;
3174 PL_expect = XSTATE;
85e6fe83
LW		 3175}
3176
e4783991
GS		 3177void
3178Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3179{
3180 va_list args;
3181 va_start(args, ver);
3182 vload_module(flags, name, ver, &args);
3183 va_end(args);
3184}
3185
3186#ifdef PERL_IMPLICIT_CONTEXT
3187void
3188Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3189{
3190 dTHX;
3191 va_list args;
3192 va_start(args, ver);
3193 vload_module(flags, name, ver, &args);
3194 va_end(args);
3195}
3196#endif
3197
3198void
3199Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3200{
3201 OP *modname, *veop, *imop;
3202
3203 modname = newSVOP(OP_CONST, 0, name);
3204 modname->op_private |= OPpCONST_BARE;
3205 if (ver) {
3206 veop = newSVOP(OP_CONST, 0, ver);
3207 }
3208 else
3209 veop = Nullop;
3210 if (flags & PERL_LOADMOD_NOIMPORT) {
3211 imop = sawparens(newNULLLIST());
3212 }
3213 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3214 imop = va_arg(*args, OP*);
3215 }
3216 else {
3217 SV *sv;
3218 imop = Nullop;
3219 sv = va_arg(*args, SV*);
3220 while (sv) {
3221 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3222 sv = va_arg(*args, SV*);
3223 }
3224 }
3225 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3226 veop, modname, imop);
3227}
3228
79072805 3229OP *
864dbfa3 3230Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3231{
3232 OP *doop;
3233 GV *gv;
3234
3235 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3236 if (!(gv && GvIMPORTED_CV(gv)))
3237 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3238
3239 if (gv && GvIMPORTED_CV(gv)) {
3240 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3241 append_elem(OP_LIST, term,
3242 scalar(newUNOP(OP_RV2CV, 0,
3243 newGVOP(OP_GV, 0,
3244 gv))))));
3245 }
3246 else {
3247 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3248 }
3249 return doop;
3250}
3251
3252OP *
864dbfa3 3253Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3254{
3255 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3256 list(force_list(subscript)),
3257 list(force_list(listval)) );
79072805
LW		 3258}
3259
76e3520e 3260STATIC I32
cea2e8a9 3261S_list_assignment(pTHX_ register OP *o)
79072805 3262{
11343788 3263 if (!o)
79072805
LW		 3264 return TRUE;
3265
11343788
MB		 3266 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3267 o = cUNOPo->op_first;
79072805 3268
11343788 3269 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3270 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3271 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3272
3273 if (t && f)
3274 return TRUE;
3275 if (t || f)
3276 yyerror("Assignment to both a list and a scalar");
3277 return FALSE;
3278 }
3279
11343788
MB		 3280 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3281 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3282 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3283 return TRUE;
3284
11343788 3285 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3286 return TRUE;
3287
11343788 3288 if (o->op_type == OP_RV2SV)
79072805
LW		 3289 return FALSE;
3290
3291 return FALSE;
3292}
3293
3294OP *
864dbfa3 3295Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3296{
11343788 3297 OP *o;
79072805 3298
a0d0e21e
LW		 3299 if (optype) {
3300 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3301 return newLOGOP(optype, 0,
3302 mod(scalar(left), optype),
3303 newUNOP(OP_SASSIGN, 0, scalar(right)));
3304 }
3305 else {
3306 return newBINOP(optype, OPf_STACKED,
3307 mod(scalar(left), optype), scalar(right));
3308 }
3309 }
3310
79072805 3311 if (list_assignment(left)) {
6ee623d5 3312 dTHR;
10c8fecd
GS		 3313 OP *curop;
3314
3280af22
NIS		 3315 PL_modcount = 0;
3316 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3317 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3318 if (PL_eval_start)
3319 PL_eval_start = 0;
748a9306 3320 else {
a0d0e21e
LW		 3321 op_free(left);
3322 op_free(right);
3323 return Nullop;
3324 }
10c8fecd
GS		 3325 curop = list(force_list(left));
3326 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3327 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3328 for (curop = ((LISTOP*)curop)->op_first;
3329 curop; curop = curop->op_sibling)
3330 {
3331 if (curop->op_type == OP_RV2HV &&
3332 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3333 o->op_private |= OPpASSIGN_HASH;
3334 break;
3335 }
3336 }
a0d0e21e 3337 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3338 OP *lastop = o;
3280af22 3339 PL_generation++;
11343788 3340 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3341 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3342 if (curop->op_type == OP_GV) {
638eceb6 3343 GV *gv = cGVOPx_gv(curop);
3280af22 3344 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3345 break;
3280af22 3346 SvCUR(gv) = PL_generation;
79072805 3347 }
748a9306
LW		 3348 else if (curop->op_type == OP_PADSV ||
3349 curop->op_type == OP_PADAV ||
3350 curop->op_type == OP_PADHV ||
3351 curop->op_type == OP_PADANY) {
3280af22 3352 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3353 SV *sv = svp[curop->op_targ];
3280af22 3354 if (SvCUR(sv) == PL_generation)
748a9306 3355 break;
3280af22 3356 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3357 }
79072805
LW		 3358 else if (curop->op_type == OP_RV2CV)
3359 break;
3360 else if (curop->op_type == OP_RV2SV ||
3361 curop->op_type == OP_RV2AV ||
3362 curop->op_type == OP_RV2HV ||
3363 curop->op_type == OP_RV2GV) {
3364 if (lastop->op_type != OP_GV) /* funny deref? */
3365 break;
3366 }
1167e5da
SM		 3367 else if (curop->op_type == OP_PUSHRE) {
3368 if (((PMOP*)curop)->op_pmreplroot) {
3369 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3370 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3371 break;
3280af22 3372 SvCUR(gv) = PL_generation;
1167e5da
SM		 3373 }
3374 }
79072805
LW		 3375 else
3376 break;
3377 }
3378 lastop = curop;
3379 }
11343788 3380 if (curop != o)
10c8fecd 3381 o->op_private |= OPpASSIGN_COMMON;
79072805 3382 }
c07a80fd 3383 if (right && right->op_type == OP_SPLIT) {
3384 OP* tmpop;
3385 if ((tmpop = ((LISTOP*)right)->op_first) &&
3386 tmpop->op_type == OP_PUSHRE)
3387 {
3388 PMOP *pm = (PMOP*)tmpop;
3389 if (left->op_type == OP_RV2AV &&
3390 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3391 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3392 {
3393 tmpop = ((UNOP*)left)->op_first;
3394 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3395#ifdef USE_ITHREADS
3396 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3397 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3398#else
3399 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3400 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3401#endif
c07a80fd 3402 pm->op_pmflags |= PMf_ONCE;
11343788 3403 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3404 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3405 tmpop->op_sibling = Nullop; /* don't free split */
3406 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3407 op_free(o); /* blow off assign */
54310121 3408 right->op_flags &= ~OPf_WANT;
a5f75d66 3409 /* "I don't know and I don't care." */
c07a80fd 3410 return right;
3411 }
3412 }
3413 else {
3280af22 3414 if (PL_modcount < 10000 &&
c07a80fd 3415 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3416 {
3417 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3418 if (SvIVX(sv) == 0)
3280af22 3419 sv_setiv(sv, PL_modcount+1);
c07a80fd 3420 }
3421 }
3422 }
3423 }
11343788 3424 return o;
79072805
LW		 3425 }
3426 if (!right)
3427 right = newOP(OP_UNDEF, 0);
3428 if (right->op_type == OP_READLINE) {
3429 right->op_flags |= OPf_STACKED;
463ee0b2 3430 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3431 }
a0d0e21e 3432 else {
3280af22 3433 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3434 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3435 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3436 if (PL_eval_start)
3437 PL_eval_start = 0;
748a9306 3438 else {
11343788 3439 op_free(o);
a0d0e21e
LW		 3440 return Nullop;
3441 }
3442 }
11343788 3443 return o;
79072805
LW		 3444}
3445
3446OP *
864dbfa3 3447Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3448{
11343788 3449 dTHR;
bbce6d69 3450 U32 seq = intro_my();
79072805
LW		 3451 register COP *cop;
3452
b7dc083c 3453 NewOp(1101, cop, 1, COP);
57843af0 3454 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3455 cop->op_type = OP_DBSTATE;
22c35a8c 3456 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3457 }
3458 else {
3459 cop->op_type = OP_NEXTSTATE;
22c35a8c 3460 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3461 }
79072805 3462 cop->op_flags = flags;
393fec97 3463 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3464#ifdef NATIVE_HINTS
3465 cop->op_private |= NATIVE_HINTS;
3466#endif
e24b16f9 3467 PL_compiling.op_private = cop->op_private;
79072805
LW		 3468 cop->op_next = (OP*)cop;
3469
463ee0b2
LW		 3470 if (label) {
3471 cop->cop_label = label;
3280af22 3472 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3473 }
bbce6d69 3474 cop->cop_seq = seq;
3280af22 3475 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3476 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3477 cop->cop_warnings = PL_curcop->cop_warnings ;
3478 else
3479 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3480
79072805 3481
3280af22 3482 if (PL_copline == NOLINE)
57843af0 3483 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3484 else {
57843af0 3485 CopLINE_set(cop, PL_copline);
3280af22 3486 PL_copline = NOLINE;
79072805 3487 }
57843af0
GS		 3488#ifdef USE_ITHREADS
3489 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3490#else
cc49e20b 3491 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3492#endif
11faa288 3493 CopSTASH_set(cop, PL_curstash);
79072805 3494
3280af22 3495 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3496 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3497 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3498 (void)SvIOK_on(*svp);
57b2e452 3499 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3500 }
3501 }
3502
11343788 3503 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3504}
3505
bbce6d69 3506/* "Introduce" my variables to visible status. */
3507U32
864dbfa3 3508Perl_intro_my(pTHX)
bbce6d69 3509{
3510 SV **svp;
3511 SV *sv;
3512 I32 i;
3513
3280af22
NIS		 3514 if (! PL_min_intro_pending)
3515 return PL_cop_seqmax;
bbce6d69 3516
3280af22
NIS		 3517 svp = AvARRAY(PL_comppad_name);
3518 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3519 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3520 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3521 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3522 }
3523 }
3280af22
NIS		 3524 PL_min_intro_pending = 0;
3525 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3526 return PL_cop_seqmax++;
bbce6d69 3527}
3528
79072805 3529OP *
864dbfa3 3530Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3531{
883ffac3
CS		 3532 return new_logop(type, flags, &first, &other);
3533}
3534
3bd495df 3535STATIC OP *
cea2e8a9 3536S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3537{
11343788 3538 dTHR;
79072805 3539 LOGOP *logop;
11343788 3540 OP *o;
883ffac3
CS		 3541 OP *first = *firstp;
3542 OP *other = *otherp;
79072805 3543
a0d0e21e
LW		 3544 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3545 return newBINOP(type, flags, scalar(first), scalar(other));
3546
8990e307 3547 scalarboolean(first);
79072805
LW		 3548 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3549 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3550 if (type == OP_AND || type == OP_OR) {
3551 if (type == OP_AND)
3552 type = OP_OR;
3553 else
3554 type = OP_AND;
11343788 3555 o = first;
883ffac3 3556 first = *firstp = cUNOPo->op_first;
11343788
MB		 3557 if (o->op_next)
3558 first->op_next = o->op_next;
3559 cUNOPo->op_first = Nullop;
3560 op_free(o);
79072805
LW		 3561 }
3562 }
3563 if (first->op_type == OP_CONST) {
4673fc70 3564 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
e476b1b5 3565 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3566 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3567 op_free(first);
883ffac3 3568 *firstp = Nullop;
79072805
LW		 3569 return other;
3570 }
3571 else {
3572 op_free(other);
883ffac3 3573 *otherp = Nullop;
79072805
LW		 3574 return first;
3575 }
3576 }
3577 else if (first->op_type == OP_WANTARRAY) {
3578 if (type == OP_AND)
3579 list(other);
3580 else
3581 scalar(other);
3582 }
e476b1b5 3583 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3584 OP *k1 = ((UNOP*)first)->op_first;
3585 OP *k2 = k1->op_sibling;
3586 OPCODE warnop = 0;
3587 switch (first->op_type)
3588 {
3589 case OP_NULL:
3590 if (k2 && k2->op_type == OP_READLINE
3591 && (k2->op_flags & OPf_STACKED)
55d729e4 3592 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3593 {
a6006777 3594 warnop = k2->op_type;
72b16652 3595 }
a6006777 3596 break;
3597
3598 case OP_SASSIGN:
68dc0745 3599 if (k1->op_type == OP_READDIR
3600 || k1->op_type == OP_GLOB
72b16652 3601 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3602 || k1->op_type == OP_EACH)
72b16652
GS		 3603 {
3604 warnop = ((k1->op_type == OP_NULL)
3605 ? k1->op_targ : k1->op_type);
3606 }
a6006777 3607 break;
3608 }
8ebc5c01 3609 if (warnop) {
57843af0
GS		 3610 line_t oldline = CopLINE(PL_curcop);
3611 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3612 Perl_warner(aTHX_ WARN_MISC,
599cee73 3613 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3614 PL_op_desc[warnop],
68dc0745 3615 ((warnop == OP_READLINE || warnop == OP_GLOB)
3616 ? " construct" : "() operator"));
57843af0 3617 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3618 }
a6006777 3619 }
79072805
LW		 3620
3621 if (!other)
3622 return first;
3623
a0d0e21e
LW		 3624 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3625 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3626
b7dc083c 3627 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3628
3629 logop->op_type = type;
22c35a8c 3630 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3631 logop->op_first = first;
3632 logop->op_flags = flags | OPf_KIDS;
3633 logop->op_other = LINKLIST(other);
c07a80fd 3634 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3635
3636 /* establish postfix order */
3637 logop->op_next = LINKLIST(first);
3638 first->op_next = (OP*)logop;
3639 first->op_sibling = other;
3640
11343788
MB		 3641 o = newUNOP(OP_NULL, 0, (OP*)logop);
3642 other->op_next = o;
79072805 3643
11343788 3644 return o;
79072805
LW		 3645}
3646
3647OP *
864dbfa3 3648Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3649{
11343788 3650 dTHR;
1a67a97c
SM		 3651 LOGOP *logop;
3652 OP *start;
11343788 3653 OP *o;
79072805 3654
b1cb66bf 3655 if (!falseop)
3656 return newLOGOP(OP_AND, 0, first, trueop);
3657 if (!trueop)
3658 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3659
8990e307 3660 scalarboolean(first);
79072805
LW		 3661 if (first->op_type == OP_CONST) {
3662 if (SvTRUE(((SVOP*)first)->op_sv)) {
3663 op_free(first);
b1cb66bf 3664 op_free(falseop);
3665 return trueop;
79072805
LW		 3666 }
3667 else {
3668 op_free(first);
b1cb66bf 3669 op_free(trueop);
3670 return falseop;
79072805
LW		 3671 }
3672 }
3673 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3674 list(trueop);
3675 scalar(falseop);
79072805 3676 }
1a67a97c
SM		 3677 NewOp(1101, logop, 1, LOGOP);
3678 logop->op_type = OP_COND_EXPR;
3679 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3680 logop->op_first = first;
3681 logop->op_flags = flags | OPf_KIDS;
3682 logop->op_private = 1 | (flags >> 8);
3683 logop->op_other = LINKLIST(trueop);
3684 logop->op_next = LINKLIST(falseop);
79072805 3685
79072805
LW		 3686
3687 /* establish postfix order */
1a67a97c
SM		 3688 start = LINKLIST(first);
3689 first->op_next = (OP*)logop;
79072805 3690
b1cb66bf 3691 first->op_sibling = trueop;
3692 trueop->op_sibling = falseop;
1a67a97c 3693 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3694
1a67a97c 3695 trueop->op_next = falseop->op_next = o;
79072805 3696
1a67a97c 3697 o->op_next = start;
11343788 3698 return o;
79072805
LW		 3699}
3700
3701OP *
864dbfa3 3702Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3703{
b35b2403 3704 dTHR;
1a67a97c 3705 LOGOP *range;
79072805
LW		 3706 OP *flip;
3707 OP *flop;
1a67a97c 3708 OP *leftstart;
11343788 3709 OP *o;
79072805 3710
1a67a97c 3711 NewOp(1101, range, 1, LOGOP);
79072805 3712
1a67a97c
SM		 3713 range->op_type = OP_RANGE;
3714 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3715 range->op_first = left;
3716 range->op_flags = OPf_KIDS;
3717 leftstart = LINKLIST(left);
3718 range->op_other = LINKLIST(right);
3719 range->op_private = 1 | (flags >> 8);
79072805
LW		 3720
3721 left->op_sibling = right;
3722
1a67a97c
SM		 3723 range->op_next = (OP*)range;
3724 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3725 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3726 o = newUNOP(OP_NULL, 0, flop);
79072805 3727 linklist(flop);
1a67a97c 3728 range->op_next = leftstart;
79072805
LW		 3729
3730 left->op_next = flip;
3731 right->op_next = flop;
3732
1a67a97c
SM		 3733 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3734 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3735 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3736 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3737
3738 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3739 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3740
11343788 3741 flip->op_next = o;
79072805 3742 if (!flip->op_private || !flop->op_private)
11343788 3743 linklist(o); /* blow off optimizer unless constant */
79072805 3744
11343788 3745 return o;
79072805
LW		 3746}
3747
3748OP *
864dbfa3 3749Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3750{
11343788 3751 dTHR;
463ee0b2 3752 OP* listop;
11343788 3753 OP* o;
463ee0b2 3754 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3755 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3756
463ee0b2
LW		 3757 if (expr) {
3758 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3759 return block; /* do {} while 0 does once */
fb73857a 3760 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3761 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3762 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3763 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3764 } else if (expr->op_flags & OPf_KIDS) {
3765 OP *k1 = ((UNOP*)expr)->op_first;
3766 OP *k2 = (k1) ? k1->op_sibling : NULL;
3767 switch (expr->op_type) {
3768 case OP_NULL:
3769 if (k2 && k2->op_type == OP_READLINE
3770 && (k2->op_flags & OPf_STACKED)
3771 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3772 expr = newUNOP(OP_DEFINED, 0, expr);
3773 break;
3774
3775 case OP_SASSIGN:
3776 if (k1->op_type == OP_READDIR
3777 || k1->op_type == OP_GLOB
72b16652 3778 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3779 || k1->op_type == OP_EACH)
3780 expr = newUNOP(OP_DEFINED, 0, expr);
3781 break;
3782 }
774d564b 3783 }
463ee0b2 3784 }
93a17b20 3785
8990e307 3786 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3787 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3788
883ffac3
CS		 3789 if (listop)
3790 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3791
11343788
MB		 3792 if (once && o != listop)
3793 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3794
11343788
MB		 3795 if (o == listop)
3796 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3797
11343788
MB		 3798 o->op_flags |= flags;
3799 o = scope(o);
3800 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3801 return o;
79072805
LW		 3802}
3803
3804OP *
864dbfa3 3805Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3806{
11343788 3807 dTHR;
79072805
LW		 3808 OP *redo;
3809 OP *next = 0;
3810 OP *listop;
11343788 3811 OP *o;
79072805 3812 OP *condop;
1ba6ee2b 3813 U8 loopflags = 0;
79072805 3814
fb73857a 3815 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3816 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3817 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3818 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3819 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3820 OP *k1 = ((UNOP*)expr)->op_first;
3821 OP *k2 = (k1) ? k1->op_sibling : NULL;
3822 switch (expr->op_type) {
3823 case OP_NULL:
3824 if (k2 && k2->op_type == OP_READLINE
3825 && (k2->op_flags & OPf_STACKED)
3826 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3827 expr = newUNOP(OP_DEFINED, 0, expr);
3828 break;
3829
3830 case OP_SASSIGN:
3831 if (k1->op_type == OP_READDIR
3832 || k1->op_type == OP_GLOB
72b16652 3833 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3834 || k1->op_type == OP_EACH)
3835 expr = newUNOP(OP_DEFINED, 0, expr);
3836 break;
3837 }
748a9306 3838 }
79072805
LW		 3839
3840 if (!block)
3841 block = newOP(OP_NULL, 0);
87246558
GS		 3842 else if (cont) {
3843 block = scope(block);
3844 }
79072805 3845
1ba6ee2b 3846 if (cont) {
79072805 3847 next = LINKLIST(cont);
1ba6ee2b
GS		 3848 loopflags |= OPpLOOP_CONTINUE;
3849 }
fb73857a 3850 if (expr) {
79072805 3851 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3852 if ((line_t)whileline != NOLINE) {
3280af22 3853 PL_copline = whileline;
fb73857a 3854 cont = append_elem(OP_LINESEQ, cont,
3855 newSTATEOP(0, Nullch, Nullop));
3856 }
3857 }
79072805 3858
463ee0b2 3859 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3860 redo = LINKLIST(listop);
3861
3862 if (expr) {
3280af22 3863 PL_copline = whileline;
883ffac3
CS		 3864 scalar(listop);
3865 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3866 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3867 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3868 op_free((OP*)loop);
883ffac3 3869 return Nullop; /* listop already freed by new_logop */
463ee0b2 3870 }
883ffac3
CS		 3871 if (listop)
3872 ((LISTOP*)listop)->op_last->op_next = condop =
3873 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3874 if (!next)
3875 next = condop;
3876 }
3877 else
11343788 3878 o = listop;
79072805
LW		 3879
3880 if (!loop) {
b7dc083c 3881 NewOp(1101,loop,1,LOOP);
79072805 3882 loop->op_type = OP_ENTERLOOP;
22c35a8c 3883 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3884 loop->op_private = 0;
3885 loop->op_next = (OP*)loop;
3886 }
3887
11343788 3888 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3889
3890 loop->op_redoop = redo;
11343788 3891 loop->op_lastop = o;
1ba6ee2b 3892 o->op_private |= loopflags;
79072805
LW		 3893
3894 if (next)
3895 loop->op_nextop = next;
3896 else
11343788 3897 loop->op_nextop = o;
79072805 3898
11343788
MB		 3899 o->op_flags |= flags;
3900 o->op_private |= (flags >> 8);
3901 return o;
79072805
LW		 3902}
3903
3904OP *
864dbfa3 3905Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3906{
3907 LOOP *loop;
fb73857a 3908 OP *wop;
85e6fe83 3909 int padoff = 0;
4633a7c4 3910 I32 iterflags = 0;
79072805 3911
79072805 3912 if (sv) {
85e6fe83 3913 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3914 sv->op_type = OP_RV2GV;
22c35a8c 3915 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3916 }
85e6fe83
LW		 3917 else if (sv->op_type == OP_PADSV) { /* private variable */
3918 padoff = sv->op_targ;
743e66e6 3919 sv->op_targ = 0;
85e6fe83
LW		 3920 op_free(sv);
3921 sv = Nullop;
3922 }
54b9620d
MB		 3923 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3924 padoff = sv->op_targ;
743e66e6 3925 sv->op_targ = 0;
54b9620d
MB		 3926 iterflags |= OPf_SPECIAL;
3927 op_free(sv);
3928 sv = Nullop;
3929 }
79072805 3930 else
cea2e8a9 3931 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3932 }
3933 else {
54b9620d
MB		 3934#ifdef USE_THREADS
3935 padoff = find_threadsv("_");
3936 iterflags |= OPf_SPECIAL;
3937#else
3280af22 3938 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3939#endif
79072805 3940 }
5f05dabc 3941 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3942 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3943 iterflags |= OPf_STACKED;
3944 }
89ea2908
GA		 3945 else if (expr->op_type == OP_NULL &&
3946 (expr->op_flags & OPf_KIDS) &&
3947 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3948 {
3949 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3950 * set the STACKED flag to indicate that these values are to be
3951 * treated as min/max values by 'pp_iterinit'.
3952 */
3953 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3954 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3955 OP* left = range->op_first;
3956 OP* right = left->op_sibling;
5152d7c7 3957 LISTOP* listop;
89ea2908
GA		 3958
3959 range->op_flags &= ~OPf_KIDS;
3960 range->op_first = Nullop;
3961
5152d7c7 3962 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3963 listop->op_first->op_next = range->op_next;
3964 left->op_next = range->op_other;
5152d7c7
GS		 3965 right->op_next = (OP*)listop;
3966 listop->op_next = listop->op_first;
89ea2908
GA		 3967
3968 op_free(expr);
5152d7c7 3969 expr = (OP*)(listop);
89ea2908
GA		 3970 null(expr);
3971 iterflags |= OPf_STACKED;
3972 }
3973 else {
3974 expr = mod(force_list(expr), OP_GREPSTART);
3975 }
3976
3977
4633a7c4 3978 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3979 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3980 assert(!loop->op_next);
b7dc083c 3981#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 3982 {
3983 LOOP *tmp;
3984 NewOp(1234,tmp,1,LOOP);
3985 Copy(loop,tmp,1,LOOP);
3986 loop = tmp;
3987 }
b7dc083c 3988#else
85e6fe83 3989 Renew(loop, 1, LOOP);
b7dc083c 3990#endif
85e6fe83 3991 loop->op_targ = padoff;
fb73857a 3992 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3993 PL_copline = forline;
fb73857a 3994 return newSTATEOP(0, label, wop);
79072805
LW		 3995}
3996
8990e307 3997OP*
864dbfa3 3998Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3999{
11343788
MB		 4000 dTHR;
4001 OP *o;
2d8e6c8d
GS		 4002 STRLEN n_a;
4003
8990e307 4004 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4005 /* "last()" means "last" */
4006 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4007 o = newOP(type, OPf_SPECIAL);
4008 else {
4009 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4010 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4011 : ""));
4012 }
8990e307
LW		 4013 op_free(label);
4014 }
4015 else {
a0d0e21e
LW		 4016 if (label->op_type == OP_ENTERSUB)
4017 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4018 o = newUNOP(type, OPf_STACKED, label);
8990e307 4019 }
3280af22 4020 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4021 return o;
8990e307
LW		 4022}
4023
79072805 4024void
864dbfa3 4025Perl_cv_undef(pTHX_ CV *cv)
79072805 4026{
11343788
MB		 4027 dTHR;
4028#ifdef USE_THREADS
e858de61
MB		 4029 if (CvMUTEXP(cv)) {
4030 MUTEX_DESTROY(CvMUTEXP(cv));
4031 Safefree(CvMUTEXP(cv));
4032 CvMUTEXP(cv) = 0;
4033 }
11343788
MB		 4034#endif /* USE_THREADS */
4035
a0d0e21e 4036 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4037#ifdef USE_THREADS
4038 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4039 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4040#else
a0d0e21e 4041 if (CvDEPTH(cv))
cea2e8a9 4042 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4043#endif /* USE_THREADS */
8990e307 4044 ENTER;
a0d0e21e 4045
7766f137 4046 SAVEVPTR(PL_curpad);
3280af22 4047 PL_curpad = 0;
a0d0e21e 4048
a5f75d66 4049 if (!CvCLONED(cv))
748a9306 4050 op_free(CvROOT(cv));
79072805 4051 CvROOT(cv) = Nullop;
8990e307 4052 LEAVE;
79072805 4053 }
1d5db326 4054 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4055 CvFLAGS(cv) = 0;
8e07c86e
AD		 4056 SvREFCNT_dec(CvGV(cv));
4057 CvGV(cv) = Nullgv;
4058 SvREFCNT_dec(CvOUTSIDE(cv));
4059 CvOUTSIDE(cv) = Nullcv;
4060 if (CvPADLIST(cv)) {
8ebc5c01 4061 /* may be during global destruction */
4062 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4063 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4064 while (i >= 0) {
4065 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4066 SV* sv = svp ? *svp : Nullsv;
4067 if (!sv)
4068 continue;
3280af22
NIS		 4069 if (sv == (SV*)PL_comppad_name)
4070 PL_comppad_name = Nullav;
4071 else if (sv == (SV*)PL_comppad) {
4072 PL_comppad = Nullav;
4073 PL_curpad = Null(SV**);
46fc3d4c 4074 }
4075 SvREFCNT_dec(sv);
8ebc5c01 4076 }
4077 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4078 }
8e07c86e
AD		 4079 CvPADLIST(cv) = Nullav;
4080 }
79072805
LW		 4081}
4082
76e3520e 4083STATIC void
743e66e6 4084S_cv_dump(pTHX_ CV *cv)
5f05dabc 4085{
62fde642 4086#ifdef DEBUGGING
5f05dabc 4087 CV *outside = CvOUTSIDE(cv);
4088 AV* padlist = CvPADLIST(cv);
4fdae800 4089 AV* pad_name;
4090 AV* pad;
4091 SV** pname;
4092 SV** ppad;
5f05dabc 4093 I32 ix;
4094
b900a521
JH		 4095 PerlIO_printf(Perl_debug_log,
4096 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4097 PTR2UV(cv),
ab50184a 4098 (CvANON(cv) ? "ANON"
6b88bc9c 4099 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4100 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4101 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4102 PTR2UV(outside),
ab50184a
CS		 4103 (!outside ? "null"
4104 : CvANON(outside) ? "ANON"
6b88bc9c 4105 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4106 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4107 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4108
4fdae800 4109 if (!padlist)
4110 return;
4111
4112 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4113 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4114 pname = AvARRAY(pad_name);
4115 ppad = AvARRAY(pad);
4116
93965878 4117 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4118 if (SvPOK(pname[ix]))
b900a521
JH		 4119 PerlIO_printf(Perl_debug_log,
4120 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4121 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4122 SvFAKE(pname[ix]) ? "FAKE " : "",
4123 SvPVX(pname[ix]),
b900a521
JH		 4124 (IV)I_32(SvNVX(pname[ix])),
4125 SvIVX(pname[ix]));
5f05dabc 4126 }
743e66e6 4127#endif /* DEBUGGING */
62fde642 4128}
5f05dabc 4129
76e3520e 4130STATIC CV *
cea2e8a9 4131S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4132{
11343788 4133 dTHR;
748a9306
LW		 4134 AV* av;
4135 I32 ix;
4136 AV* protopadlist = CvPADLIST(proto);
4137 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4138 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4139 SV** pname = AvARRAY(protopad_name);
4140 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4141 I32 fname = AvFILLp(protopad_name);
4142 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4143 AV* comppadlist;
4144 CV* cv;
4145
07055b4c
CS		 4146 assert(!CvUNIQUE(proto));
4147
748a9306 4148 ENTER;
354992b1 4149 SAVECOMPPAD();
3280af22
NIS		 4150 SAVESPTR(PL_comppad_name);
4151 SAVESPTR(PL_compcv);
748a9306 4152
3280af22 4153 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4154 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4155 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4156 CvCLONED_on(cv);
748a9306 4157
11343788 4158#ifdef USE_THREADS
12ca11f6 4159 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4160 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4161 CvOWNER(cv) = 0;
4162#endif /* USE_THREADS */
57843af0 4163 CvFILE(cv) = CvFILE(proto);
44a8e56a 4164 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4165 CvSTASH(cv) = CvSTASH(proto);
4166 CvROOT(cv) = CvROOT(proto);
4167 CvSTART(cv) = CvSTART(proto);
5f05dabc 4168 if (outside)
4169 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4170
68dc0745 4171 if (SvPOK(proto))
4172 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4173
3280af22 4174 PL_comppad_name = newAV();
46fc3d4c 4175 for (ix = fname; ix >= 0; ix--)
3280af22 4176 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4177
3280af22 4178 PL_comppad = newAV();
748a9306
LW		 4179
4180 comppadlist = newAV();
4181 AvREAL_off(comppadlist);
3280af22
NIS		 4182 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4183 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4184 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4185 av_fill(PL_comppad, AvFILLp(protopad));
4186 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4187
4188 av = newAV(); /* will be @_ */
4189 av_extend(av, 0);
3280af22 4190 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4191 AvFLAGS(av) = AVf_REIFY;
4192
9607fc9c 4193 for (ix = fpad; ix > 0; ix--) {
4194 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4195 if (namesv && namesv != &PL_sv_undef) {
aa689395 4196 char *name = SvPVX(namesv); /* XXX */
4197 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4198 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4199 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4200 if (!off)
3280af22 4201 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4202 else if (off != ix)
cea2e8a9 4203 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4204 }
4205 else { /* our own lexical */
aa689395 4206 SV* sv;
5f05dabc 4207 if (*name == '&') {
4208 /* anon code -- we'll come back for it */
4209 sv = SvREFCNT_inc(ppad[ix]);
4210 }
4211 else if (*name == '@')
4212 sv = (SV*)newAV();
748a9306 4213 else if (*name == '%')
5f05dabc 4214 sv = (SV*)newHV();
748a9306 4215 else
5f05dabc 4216 sv = NEWSV(0,0);
4217 if (!SvPADBUSY(sv))
4218 SvPADMY_on(sv);
3280af22 4219 PL_curpad[ix] = sv;
748a9306
LW		 4220 }
4221 }
7766f137 4222 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4223 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4224 }
748a9306 4225 else {
aa689395 4226 SV* sv = NEWSV(0,0);
748a9306 4227 SvPADTMP_on(sv);
3280af22 4228 PL_curpad[ix] = sv;
748a9306
LW		 4229 }
4230 }
4231
5f05dabc 4232 /* Now that vars are all in place, clone nested closures. */
4233
9607fc9c 4234 for (ix = fpad; ix > 0; ix--) {
4235 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4236 if (namesv
3280af22 4237 && namesv != &PL_sv_undef
aa689395 4238 && !(SvFLAGS(namesv) & SVf_FAKE)
4239 && *SvPVX(namesv) == '&'
5f05dabc 4240 && CvCLONE(ppad[ix]))
4241 {
4242 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4243 SvREFCNT_dec(ppad[ix]);
4244 CvCLONE_on(kid);
4245 SvPADMY_on(kid);
3280af22 4246 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4247 }
4248 }
4249
5f05dabc 4250#ifdef DEBUG_CLOSURES
ab50184a
CS		 4251 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4252 cv_dump(outside);
4253 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4254 cv_dump(proto);
ab50184a 4255 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4256 cv_dump(cv);
4257#endif
4258
748a9306
LW		 4259 LEAVE;
4260 return cv;
4261}
4262
4263CV *
864dbfa3 4264Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4265{
b099ddc0 4266 CV *cv;
1feb2720 4267 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4268 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4269 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4270 return cv;
5f05dabc 4271}
4272
3fe9a6f1 4273void
864dbfa3 4274Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4275{
0453d815
PM		 4276 dTHR;
4277
e476b1b5 4278 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4279 SV* msg = sv_newmortal();
3fe9a6f1 4280 SV* name = Nullsv;
4281
4282 if (gv)
46fc3d4c 4283 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4284 sv_setpv(msg, "Prototype mismatch:");
4285 if (name)
894356b3 4286 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4287 if (SvPOK(cv))
cea2e8a9 4288 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4289 sv_catpv(msg, " vs ");
4290 if (p)
cea2e8a9 4291 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4292 else
4293 sv_catpv(msg, "none");
e476b1b5 4294 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4295 }
4296}
4297
760ac839 4298SV *
864dbfa3 4299Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4300{
54310121 4301 if (!cv || !SvPOK(cv) || SvCUR(cv))
4302 return Nullsv;
fe5e78ed
GS		 4303 return op_const_sv(CvSTART(cv), cv);
4304}
760ac839 4305
fe5e78ed 4306SV *
864dbfa3 4307Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4308{
4309 SV *sv = Nullsv;
4310
0f79a09d 4311 if (!o)
fe5e78ed
GS		 4312 return Nullsv;
4313
0f79a09d 4314 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4315 o = cLISTOPo->op_first->op_sibling;
4316
4317 for (; o; o = o->op_next) {
54310121 4318 OPCODE type = o->op_type;
fe5e78ed 4319
acb36ea4 4320 if (sv && o->op_next == o)
fe5e78ed 4321 return sv;
54310121 4322 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4323 continue;
4324 if (type == OP_LEAVESUB || type == OP_RETURN)
4325 break;
4326 if (sv)
4327 return Nullsv;
7766f137 4328 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4329 sv = cSVOPo->op_sv;
7766f137 4330 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4331 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4332 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4333 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4334 return Nullsv;
760ac839 4335 }
54310121 4336 else
4337 return Nullsv;
760ac839 4338 }
5aabfad6 4339 if (sv)
4340 SvREADONLY_on(sv);
760ac839
LW		 4341 return sv;
4342}
4343
09bef843
SB		 4344void
4345Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4346{
4347 if (o)
4348 SAVEFREEOP(o);
4349 if (proto)
4350 SAVEFREEOP(proto);
4351 if (attrs)
4352 SAVEFREEOP(attrs);
4353 if (block)
4354 SAVEFREEOP(block);
4355 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4356}
4357
748a9306 4358CV *
864dbfa3 4359Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4360{
09bef843
SB		 4361 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4362}
4363
4364CV *
4365Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4366{
11343788 4367 dTHR;
2d8e6c8d 4368 STRLEN n_a;
83ee9e09
GS		 4369 char *name;
4370 char *aname;
4371 GV *gv;
2d8e6c8d 4372 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4373 register CV *cv=0;
a0d0e21e 4374 I32 ix;
79072805 4375
83ee9e09
GS		 4376 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4377 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4378 SV *sv = sv_newmortal();
4379 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4380 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4381 aname = SvPVX(sv);
4382 }
4383 else
4384 aname = Nullch;
4385 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4386 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4387 SVt_PVCV);
4388
11343788 4389 if (o)
5dc0d613 4390 SAVEFREEOP(o);
3fe9a6f1 4391 if (proto)
4392 SAVEFREEOP(proto);
09bef843
SB		 4393 if (attrs)
4394 SAVEFREEOP(attrs);
3fe9a6f1 4395
09bef843 4396 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4397 maximum a prototype before. */
4398 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4399 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4400 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4401 {
e476b1b5 4402 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4403 }
55d729e4
GS		 4404 cv_ckproto((CV*)gv, NULL, ps);
4405 }
4406 if (ps)
4407 sv_setpv((SV*)gv, ps);
4408 else
4409 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4410 SvREFCNT_dec(PL_compcv);
4411 cv = PL_compcv = NULL;
4412 PL_sub_generation++;
55d729e4
GS		 4413 goto noblock;
4414 }
4415
68dc0745 4416 if (!name || GvCVGEN(gv))
4417 cv = Nullcv;
155aba94 4418 else if ((cv = GvCV(gv))) {
3fe9a6f1 4419 cv_ckproto(cv, gv, ps);
68dc0745 4420 /* already defined (or promised)? */
4421 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4422 SV* const_sv;
fe5e78ed 4423 bool const_changed = TRUE;
09bef843 4424 if (!block && !attrs) {
aa689395 4425 /* just a "sub foo;" when &foo is already defined */
3280af22 4426 SAVEFREESV(PL_compcv);
aa689395 4427 goto done;
4428 }
7bac28a0 4429 /* ahem, death to those who redefine active sort subs */
3280af22 4430 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4431 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4432 if (!block)
4433 goto withattrs;
155aba94 4434 if ((const_sv = cv_const_sv(cv)))
fe5e78ed 4435 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
e476b1b5 4436 if ((const_sv || const_changed) && ckWARN(WARN_REDEFINE))
83ee9e09 4437 {
57843af0
GS		 4438 line_t oldline = CopLINE(PL_curcop);
4439 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4440 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4441 const_sv ? "Constant subroutine %s redefined"
09bef843 4442 : "Subroutine %s redefined", name);
57843af0 4443 CopLINE_set(PL_curcop, oldline);
79072805 4444 }
8990e307 4445 SvREFCNT_dec(cv);
68dc0745 4446 cv = Nullcv;
79072805
LW		 4447 }
4448 }
09bef843
SB		 4449 withattrs:
4450 if (attrs) {
4451 HV *stash;
4452 SV *rcv;
4453
4454 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4455 * before we clobber PL_compcv.
4456 */
4457 if (cv && !block) {
4458 rcv = (SV*)cv;
4459 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4460 stash = GvSTASH(CvGV(cv));
4461 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4462 stash = CvSTASH(cv);
4463 else
4464 stash = PL_curstash;
4465 }
4466 else {
4467 /* possibly about to re-define existing subr -- ignore old cv */
4468 rcv = (SV*)PL_compcv;
4469 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4470 stash = GvSTASH(gv);
4471 else
4472 stash = PL_curstash;
4473 }
4474 apply_attrs(stash, rcv, attrs);
4475 }
a0d0e21e 4476 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4477 if (!block) {
4478 /* got here with just attrs -- work done, so bug out */
4479 SAVEFREESV(PL_compcv);
4480 goto done;
4481 }
4633a7c4 4482 cv_undef(cv);
3280af22
NIS		 4483 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4484 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4485 CvOUTSIDE(PL_compcv) = 0;
4486 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4487 CvPADLIST(PL_compcv) = 0;
4488 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4489 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4490 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4491 }
4492 else {
3280af22 4493 cv = PL_compcv;
44a8e56a 4494 if (name) {
4495 GvCV(gv) = cv;
4496 GvCVGEN(gv) = 0;
3280af22 4497 PL_sub_generation++;
44a8e56a 4498 }
a0d0e21e 4499 }
44a8e56a 4500 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4501 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4502 CvSTASH(cv) = PL_curstash;
11343788
MB		 4503#ifdef USE_THREADS
4504 CvOWNER(cv) = 0;
1cfa4ec7 4505 if (!CvMUTEXP(cv)) {
f6aaf501 4506 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4507 MUTEX_INIT(CvMUTEXP(cv));
4508 }
11343788 4509#endif /* USE_THREADS */
8990e307 4510
3fe9a6f1 4511 if (ps)
4512 sv_setpv((SV*)cv, ps);
4633a7c4 4513
3280af22 4514 if (PL_error_count) {
c07a80fd 4515 op_free(block);
4516 block = Nullop;
68dc0745 4517 if (name) {
4518 char *s = strrchr(name, ':');
4519 s = s ? s+1 : name;
6d4c2119
CS		 4520 if (strEQ(s, "BEGIN")) {
4521 char *not_safe =
4522 "BEGIN not safe after errors--compilation aborted";
faef0170 4523 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4524 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4525 else {
4526 /* force display of errors found but not reported */
38a03e6e 4527 sv_catpv(ERRSV, not_safe);
cea2e8a9 4528 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4529 }
4530 }
68dc0745 4531 }
c07a80fd 4532 }
a0d0e21e 4533 if (!block) {
55d729e4 4534 noblock:
3280af22 4535 PL_copline = NOLINE;
a0d0e21e
LW		 4536 LEAVE_SCOPE(floor);
4537 return cv;
4538 }
4539
3280af22
NIS		 4540 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4541 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4542
7766f137
GS		 4543 if (CvLVALUE(cv)) {
4544 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4545 }
4546 else {
4547 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4548 }
4549 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4550 OpREFCNT_set(CvROOT(cv), 1);
4551 CvSTART(cv) = LINKLIST(CvROOT(cv));
4552 CvROOT(cv)->op_next = 0;
4553 peep(CvSTART(cv));
4554
4555 /* now that optimizer has done its work, adjust pad values */
54310121 4556 if (CvCLONE(cv)) {
3280af22
NIS		 4557 SV **namep = AvARRAY(PL_comppad_name);
4558 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4559 SV *namesv;
4560
7766f137 4561 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4562 continue;
4563 /*
4564 * The only things that a clonable function needs in its
4565 * pad are references to outer lexicals and anonymous subs.
4566 * The rest are created anew during cloning.
4567 */
4568 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4569 namesv != &PL_sv_undef &&
54310121 4570 (SvFAKE(namesv) ||
4571 *SvPVX(namesv) == '&')))
4572 {
3280af22
NIS		 4573 SvREFCNT_dec(PL_curpad[ix]);
4574 PL_curpad[ix] = Nullsv;
54310121 4575 }
4576 }
a0d0e21e 4577 }
54310121 4578 else {
4579 AV *av = newAV(); /* Will be @_ */
4580 av_extend(av, 0);
3280af22 4581 av_store(PL_comppad, 0, (SV*)av);
54310121 4582 AvFLAGS(av) = AVf_REIFY;
79072805 4583
3280af22 4584 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4585 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4586 continue;
3280af22
NIS		 4587 if (!SvPADMY(PL_curpad[ix]))
4588 SvPADTMP_on(PL_curpad[ix]);
54310121 4589 }
4590 }
79072805 4591
83ee9e09 4592 if (name || aname) {
44a8e56a 4593 char *s;
83ee9e09 4594 char *tname = (name ? name : aname);
44a8e56a 4595
3280af22 4596 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4597 SV *sv = NEWSV(0,0);
44a8e56a 4598 SV *tmpstr = sv_newmortal();
549bb64a 4599 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4600 CV *pcv;
44a8e56a 4601 HV *hv;
4602
ed094faf
GS		 4603 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4604 CopFILE(PL_curcop),
cc49e20b 4605 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4606 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4607 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4608 hv = GvHVn(db_postponed);
9607fc9c 4609 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4610 && (pcv = GvCV(db_postponed)))
4611 {
44a8e56a 4612 dSP;
924508f0 4613 PUSHMARK(SP);
44a8e56a 4614 XPUSHs(tmpstr);
4615 PUTBACK;
83ee9e09 4616 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4617 }
4618 }
79072805 4619
83ee9e09 4620 if ((s = strrchr(tname,':')))
28757baa 4621 s++;
4622 else
83ee9e09 4623 s = tname;
ed094faf 4624
7d30b5c4 4625 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4626 goto done;
4627
68dc0745 4628 if (strEQ(s, "BEGIN")) {
3280af22 4629 I32 oldscope = PL_scopestack_ix;
28757baa 4630 ENTER;
57843af0
GS		 4631 SAVECOPFILE(&PL_compiling);
4632 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4633 save_svref(&PL_rs);
4634 sv_setsv(PL_rs, PL_nrs);
28757baa 4635
3280af22
NIS		 4636 if (!PL_beginav)
4637 PL_beginav = newAV();
28757baa 4638 DEBUG_x( dump_sub(gv) );
ed094faf 4639 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4640 GvCV(gv) = 0;
3280af22 4641 call_list(oldscope, PL_beginav);
a6006777 4642
3280af22 4643 PL_curcop = &PL_compiling;
a0ed51b3 4644 PL_compiling.op_private = PL_hints;
28757baa 4645 LEAVE;
4646 }
3280af22
NIS		 4647 else if (strEQ(s, "END") && !PL_error_count) {
4648 if (!PL_endav)
4649 PL_endav = newAV();
ed094faf 4650 DEBUG_x( dump_sub(gv) );
3280af22 4651 av_unshift(PL_endav, 1);
ed094faf 4652 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4653 GvCV(gv) = 0;
4654 }
7d30b5c4
GS		 4655 else if (strEQ(s, "CHECK") && !PL_error_count) {
4656 if (!PL_checkav)
4657 PL_checkav = newAV();
ed094faf 4658 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4659 if (PL_main_start && ckWARN(WARN_VOID))
4660 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4661 av_unshift(PL_checkav, 1);
4662 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4663 GvCV(gv) = 0;
4664 }
3280af22
NIS		 4665 else if (strEQ(s, "INIT") && !PL_error_count) {
4666 if (!PL_initav)
4667 PL_initav = newAV();
ed094faf 4668 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4669 if (PL_main_start && ckWARN(WARN_VOID))
4670 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
3280af22 4671 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4672 GvCV(gv) = 0;
ae77835f 4673 }
79072805 4674 }
a6006777 4675
aa689395 4676 done:
3280af22 4677 PL_copline = NOLINE;
8990e307 4678 LEAVE_SCOPE(floor);
a0d0e21e 4679 return cv;
79072805
LW		 4680}
4681
b099ddc0 4682/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4683/*
4684=for apidoc newCONSTSUB
4685
4686Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4687eligible for inlining at compile-time.
4688
4689=cut
4690*/
4691
5476c433 4692void
864dbfa3 4693Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4694{
4695 dTHR;
5476c433 4696
11faa288
GS		 4697 ENTER;
4698 SAVECOPLINE(PL_curcop);
4699 SAVEHINTS();
4700
4701 CopLINE_set(PL_curcop, PL_copline);
3280af22 4702 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4703
4704 if (stash) {
4705 SAVESPTR(PL_curstash);
4706 SAVECOPSTASH(PL_curcop);
4707 PL_curstash = stash;
4708#ifdef USE_ITHREADS
4709 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4710#else
4711 CopSTASH(PL_curcop) = stash;
4712#endif
4713 }
5476c433 4714
09bef843 4715 newATTRSUB(
be24f278 4716 start_subparse(FALSE, 0),
5476c433 4717 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4718 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4719 Nullop,
5476c433
JD		 4720 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4721 );
4722
11faa288 4723 LEAVE;
5476c433
JD		 4724}
4725
954c1994
GS		 4726/*
4727=for apidoc U||newXS
4728
4729Used by C<xsubpp> to hook up XSUBs as Perl subs.
4730
4731=cut
4732*/
4733
57d3b86d 4734CV *
864dbfa3 4735Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4736{
11343788 4737 dTHR;
44a8e56a 4738 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4739 register CV *cv;
44a8e56a 4740
155aba94 4741 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4742 if (GvCVGEN(gv)) {
4743 /* just a cached method */
4744 SvREFCNT_dec(cv);
4745 cv = 0;
4746 }
4747 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4748 /* already defined (or promised) */
599cee73 4749 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4750 && HvNAME(GvSTASH(CvGV(cv)))
4751 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4752 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4753 if (PL_copline != NOLINE)
57843af0 4754 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4755 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4756 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4757 }
4758 SvREFCNT_dec(cv);
4759 cv = 0;
79072805 4760 }
79072805 4761 }
44a8e56a 4762
4763 if (cv) /* must reuse cv if autoloaded */
4764 cv_undef(cv);
a0d0e21e
LW		 4765 else {
4766 cv = (CV*)NEWSV(1105,0);
4767 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4768 if (name) {
4769 GvCV(gv) = cv;
4770 GvCVGEN(gv) = 0;
3280af22 4771 PL_sub_generation++;
44a8e56a 4772 }
a0d0e21e 4773 }
5196be3e 4774 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4775#ifdef USE_THREADS
12ca11f6 4776 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4777 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4778 CvOWNER(cv) = 0;
4779#endif /* USE_THREADS */
b195d487 4780 (void)gv_fetchfile(filename);
57843af0
GS		 4781 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4782 an external constant string */
a0d0e21e 4783 CvXSUB(cv) = subaddr;
44a8e56a 4784
28757baa 4785 if (name) {
4786 char *s = strrchr(name,':');
4787 if (s)
4788 s++;
4789 else
4790 s = name;
ed094faf 4791
7d30b5c4 4792 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4793 goto done;
4794
28757baa 4795 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4796 if (!PL_beginav)
4797 PL_beginav = newAV();
ed094faf 4798 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4799 GvCV(gv) = 0;
28757baa 4800 }
4801 else if (strEQ(s, "END")) {
3280af22
NIS		 4802 if (!PL_endav)
4803 PL_endav = newAV();
4804 av_unshift(PL_endav, 1);
ed094faf 4805 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4806 GvCV(gv) = 0;
28757baa 4807 }
7d30b5c4
GS		 4808 else if (strEQ(s, "CHECK")) {
4809 if (!PL_checkav)
4810 PL_checkav = newAV();
ddda08b7
GS		 4811 if (PL_main_start && ckWARN(WARN_VOID))
4812 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4813 av_unshift(PL_checkav, 1);
4814 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4815 GvCV(gv) = 0;
4816 }
7d07dbc2 4817 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4818 if (!PL_initav)
4819 PL_initav = newAV();
ddda08b7
GS		 4820 if (PL_main_start && ckWARN(WARN_VOID))
4821 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ed094faf 4822 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4823 GvCV(gv) = 0;
ae77835f 4824 }
28757baa 4825 }
8990e307 4826 else
a5f75d66 4827 CvANON_on(cv);
44a8e56a 4828
ed094faf 4829done:
a0d0e21e 4830 return cv;
79072805
LW		 4831}
4832
4833void
864dbfa3 4834Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4835{
11343788 4836 dTHR;
79072805
LW		 4837 register CV *cv;
4838 char *name;
4839 GV *gv;
a0d0e21e 4840 I32 ix;
2d8e6c8d 4841 STRLEN n_a;
79072805 4842
11343788 4843 if (o)
2d8e6c8d 4844 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4845 else
4846 name = "STDOUT";
85e6fe83 4847 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4848 GvMULTI_on(gv);
155aba94 4849 if ((cv = GvFORM(gv))) {
599cee73 4850 if (ckWARN(WARN_REDEFINE)) {
57843af0 4851 line_t oldline = CopLINE(PL_curcop);
79072805 4852
57843af0 4853 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4854 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4855 CopLINE_set(PL_curcop, oldline);
79072805 4856 }
8990e307 4857 SvREFCNT_dec(cv);
79072805 4858 }
3280af22 4859 cv = PL_compcv;
79072805 4860 GvFORM(gv) = cv;
44a8e56a 4861 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4862 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4863
3280af22
NIS		 4864 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4865 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4866 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4867 }
4868
79072805 4869 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4870 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4871 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4872 CvSTART(cv) = LINKLIST(CvROOT(cv));
4873 CvROOT(cv)->op_next = 0;
4874 peep(CvSTART(cv));
11343788 4875 op_free(o);
3280af22 4876 PL_copline = NOLINE;
8990e307 4877 LEAVE_SCOPE(floor);
79072805
LW		 4878}
4879
4880OP *
864dbfa3 4881Perl_newANONLIST(pTHX_ OP *o)
79072805 4882{
93a17b20 4883 return newUNOP(OP_REFGEN, 0,
11343788 4884 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4885}
4886
4887OP *
864dbfa3 4888Perl_newANONHASH(pTHX_ OP *o)
79072805 4889{
93a17b20 4890 return newUNOP(OP_REFGEN, 0,
11343788 4891 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4892}
4893
4894OP *
864dbfa3 4895Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4896{
09bef843
SB		 4897 return newANONATTRSUB(floor, proto, Nullop, block);
4898}
4899
4900OP *
4901Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4902{
a0d0e21e 4903 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4904 newSVOP(OP_ANONCODE, 0,
4905 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4906}
4907
4908OP *
864dbfa3 4909Perl_oopsAV(pTHX_ OP *o)
79072805 4910{
ed6116ce
LW		 4911 switch (o->op_type) {
4912 case OP_PADSV:
4913 o->op_type = OP_PADAV;
22c35a8c 4914 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4915 return ref(o, OP_RV2AV);
ed6116ce
LW		 4916
4917 case OP_RV2SV:
79072805 4918 o->op_type = OP_RV2AV;
22c35a8c 4919 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4920 ref(o, OP_RV2AV);
ed6116ce
LW		 4921 break;
4922
4923 default:
0453d815
PM		 4924 if (ckWARN_d(WARN_INTERNAL))
4925 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4926 break;
4927 }
79072805
LW		 4928 return o;
4929}
4930
4931OP *
864dbfa3 4932Perl_oopsHV(pTHX_ OP *o)
79072805 4933{
0453d815 4934 dTHR;
0453d815 4935
ed6116ce
LW		 4936 switch (o->op_type) {
4937 case OP_PADSV:
4938 case OP_PADAV:
4939 o->op_type = OP_PADHV;
22c35a8c 4940 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4941 return ref(o, OP_RV2HV);
ed6116ce
LW		 4942
4943 case OP_RV2SV:
4944 case OP_RV2AV:
79072805 4945 o->op_type = OP_RV2HV;
22c35a8c 4946 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4947 ref(o, OP_RV2HV);
ed6116ce
LW		 4948 break;
4949
4950 default:
0453d815
PM		 4951 if (ckWARN_d(WARN_INTERNAL))
4952 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4953 break;
4954 }
79072805
LW		 4955 return o;
4956}
4957
4958OP *
864dbfa3 4959Perl_newAVREF(pTHX_ OP *o)
79072805 4960{
ed6116ce
LW		 4961 if (o->op_type == OP_PADANY) {
4962 o->op_type = OP_PADAV;
22c35a8c 4963 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4964 return o;
ed6116ce 4965 }
79072805
LW		 4966 return newUNOP(OP_RV2AV, 0, scalar(o));
4967}
4968
4969OP *
864dbfa3 4970Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4971{
82092f1d 4972 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4973 return newUNOP(OP_NULL, 0, o);
748a9306 4974 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4975}
4976
4977OP *
864dbfa3 4978Perl_newHVREF(pTHX_ OP *o)
79072805 4979{
ed6116ce
LW		 4980 if (o->op_type == OP_PADANY) {
4981 o->op_type = OP_PADHV;
22c35a8c 4982 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4983 return o;
ed6116ce 4984 }
79072805
LW		 4985 return newUNOP(OP_RV2HV, 0, scalar(o));
4986}
4987
4988OP *
864dbfa3 4989Perl_oopsCV(pTHX_ OP *o)
79072805 4990{
cea2e8a9 4991 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4992 /* STUB */
4993 return o;
4994}
4995
4996OP *
864dbfa3 4997Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4998{
c07a80fd 4999 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5000}
5001
5002OP *
864dbfa3 5003Perl_newSVREF(pTHX_ OP *o)
79072805 5004{
ed6116ce
LW		 5005 if (o->op_type == OP_PADANY) {
5006 o->op_type = OP_PADSV;
22c35a8c 5007 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5008 return o;
ed6116ce 5009 }
224a4551
MB		 5010 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5011 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5012 return o;
224a4551 5013 }
79072805
LW		 5014 return newUNOP(OP_RV2SV, 0, scalar(o));
5015}
5016
5017/* Check routines. */
5018
5019OP *
cea2e8a9 5020Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5021{
178c6305
CS		 5022 PADOFFSET ix;
5023 SV* name;
5024
5025 name = NEWSV(1106,0);
5026 sv_upgrade(name, SVt_PVNV);
5027 sv_setpvn(name, "&", 1);
5028 SvIVX(name) = -1;
5029 SvNVX(name) = 1;
5dc0d613 5030 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5031 av_store(PL_comppad_name, ix, name);
5032 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5033 SvPADMY_on(cSVOPo->op_sv);
5034 cSVOPo->op_sv = Nullsv;
5035 cSVOPo->op_targ = ix;
5036 return o;
5f05dabc 5037}
5038
5039OP *
cea2e8a9 5040Perl_ck_bitop(pTHX_ OP *o)
55497cff 5041{
3280af22 5042 o->op_private = PL_hints;
5dc0d613 5043 return o;
55497cff 5044}
5045
5046OP *
cea2e8a9 5047Perl_ck_concat(pTHX_ OP *o)
79072805 5048{
11343788
MB		 5049 if (cUNOPo->op_first->op_type == OP_CONCAT)
5050 o->op_flags |= OPf_STACKED;
5051 return o;
79072805
LW		 5052}
5053
5054OP *
cea2e8a9 5055Perl_ck_spair(pTHX_ OP *o)
79072805 5056{
11343788 5057 if (o->op_flags & OPf_KIDS) {
79072805 5058 OP* newop;
a0d0e21e 5059 OP* kid;
5dc0d613
MB		 5060 OPCODE type = o->op_type;
5061 o = modkids(ck_fun(o), type);
11343788 5062 kid = cUNOPo->op_first;
a0d0e21e
LW		 5063 newop = kUNOP->op_first->op_sibling;
5064 if (newop &&
5065 (newop->op_sibling ||
22c35a8c 5066 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5067 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5068 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5069
11343788 5070 return o;
a0d0e21e
LW		 5071 }
5072 op_free(kUNOP->op_first);
5073 kUNOP->op_first = newop;
5074 }
22c35a8c 5075 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5076 return ck_fun(o);
a0d0e21e
LW		 5077}
5078
5079OP *
cea2e8a9 5080Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5081{
11343788 5082 o = ck_fun(o);
5dc0d613 5083 o->op_private = 0;
11343788
MB		 5084 if (o->op_flags & OPf_KIDS) {
5085 OP *kid = cUNOPo->op_first;
01020589
GS		 5086 switch (kid->op_type) {
5087 case OP_ASLICE:
5088 o->op_flags |= OPf_SPECIAL;
5089 /* FALL THROUGH */
5090 case OP_HSLICE:
5dc0d613 5091 o->op_private |= OPpSLICE;
01020589
GS		 5092 break;
5093 case OP_AELEM:
5094 o->op_flags |= OPf_SPECIAL;
5095 /* FALL THROUGH */
5096 case OP_HELEM:
5097 break;
5098 default:
5099 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5100 PL_op_desc[o->op_type]);
01020589 5101 }
a0d0e21e 5102 null(kid);
79072805 5103 }
11343788 5104 return o;
79072805
LW		 5105}
5106
5107OP *
cea2e8a9 5108Perl_ck_eof(pTHX_ OP *o)
79072805 5109{
11343788 5110 I32 type = o->op_type;
79072805 5111
11343788
MB		 5112 if (o->op_flags & OPf_KIDS) {
5113 if (cLISTOPo->op_first->op_type == OP_STUB) {
5114 op_free(o);
5115 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5116 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5117 }
11343788 5118 return ck_fun(o);
79072805 5119 }
11343788 5120 return o;
79072805
LW		 5121}
5122
5123OP *
cea2e8a9 5124Perl_ck_eval(pTHX_ OP *o)
79072805 5125{
3280af22 5126 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5127 if (o->op_flags & OPf_KIDS) {
5128 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5129
93a17b20 5130 if (!kid) {
11343788
MB		 5131 o->op_flags &= ~OPf_KIDS;
5132 null(o);
79072805
LW		 5133 }
5134 else if (kid->op_type == OP_LINESEQ) {
5135 LOGOP *enter;
5136
11343788
MB		 5137 kid->op_next = o->op_next;
5138 cUNOPo->op_first = 0;
5139 op_free(o);
79072805 5140
b7dc083c 5141 NewOp(1101, enter, 1, LOGOP);
79072805 5142 enter->op_type = OP_ENTERTRY;
22c35a8c 5143 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5144 enter->op_private = 0;
5145
5146 /* establish postfix order */
5147 enter->op_next = (OP*)enter;
5148
11343788
MB		 5149 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5150 o->op_type = OP_LEAVETRY;
22c35a8c 5151 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5152 enter->op_other = o;
5153 return o;
79072805 5154 }
c7cc6f1c 5155 else
473986ff 5156 scalar((OP*)kid);
79072805
LW		 5157 }
5158 else {
11343788 5159 op_free(o);
54b9620d 5160 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5161 }
3280af22 5162 o->op_targ = (PADOFFSET)PL_hints;
11343788 5163 return o;
79072805
LW		 5164}
5165
5166OP *
d98f61e7
GS		 5167Perl_ck_exit(pTHX_ OP *o)
5168{
5169#ifdef VMS
5170 HV *table = GvHV(PL_hintgv);
5171 if (table) {
5172 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5173 if (svp && *svp && SvTRUE(*svp))
5174 o->op_private |= OPpEXIT_VMSISH;
5175 }
5176#endif
5177 return ck_fun(o);
5178}
5179
5180OP *
cea2e8a9 5181Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5182{
5183 OP *kid;
11343788
MB		 5184 if (o->op_flags & OPf_STACKED) {
5185 o = ck_fun(o);
5186 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5187 if (kid->op_type == OP_RV2GV)
5188 null(kid);
79072805 5189 }
463ee0b2 5190 else
11343788
MB		 5191 o = listkids(o);
5192 return o;
79072805
LW		 5193}
5194
5195OP *
cea2e8a9 5196Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5197{
5196be3e
MB		 5198 o = ck_fun(o);
5199 if (o->op_flags & OPf_KIDS) {
5200 OP *kid = cUNOPo->op_first;
afebc493
GS		 5201 if (kid->op_type == OP_ENTERSUB) {
5202 (void) ref(kid, o->op_type);
5203 if (kid->op_type != OP_RV2CV && !PL_error_count)
5204 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5205 PL_op_desc[o->op_type]);
5206 o->op_private |= OPpEXISTS_SUB;
5207 }
5208 else if (kid->op_type == OP_AELEM)
01020589
GS		 5209 o->op_flags |= OPf_SPECIAL;
5210 else if (kid->op_type != OP_HELEM)
5211 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5212 PL_op_desc[o->op_type]);
5f05dabc 5213 null(kid);
5214 }
5196be3e 5215 return o;
5f05dabc 5216}
5217
22c35a8c 5218#if 0
5f05dabc 5219OP *
cea2e8a9 5220Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5221{
5222 o = fold_constants(o);
5223 if (o->op_type == OP_CONST)
5224 o->op_type = OP_GV;
5225 return o;
5226}
22c35a8c 5227#endif
79072805
LW		 5228
5229OP *
cea2e8a9 5230Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5231{
11343788
MB		 5232 dTHR;
5233 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5234
3280af22 5235 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5236 if (kid->op_type == OP_CONST) {
44a8e56a 5237 char *name;
5238 int iscv;
5239 GV *gv;
779c5bc9 5240 SV *kidsv = kid->op_sv;
2d8e6c8d 5241 STRLEN n_a;
44a8e56a 5242
779c5bc9
GS		 5243 /* Is it a constant from cv_const_sv()? */
5244 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5245 SV *rsv = SvRV(kidsv);
5246 int svtype = SvTYPE(rsv);
5247 char *badtype = Nullch;
5248
5249 switch (o->op_type) {
5250 case OP_RV2SV:
5251 if (svtype > SVt_PVMG)
5252 badtype = "a SCALAR";
5253 break;
5254 case OP_RV2AV:
5255 if (svtype != SVt_PVAV)
5256 badtype = "an ARRAY";
5257 break;
5258 case OP_RV2HV:
5259 if (svtype != SVt_PVHV) {
5260 if (svtype == SVt_PVAV) { /* pseudohash? */
5261 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5262 if (ksv && SvROK(*ksv)
5263 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5264 {
5265 break;
5266 }
5267 }
5268 badtype = "a HASH";
5269 }
5270 break;
5271 case OP_RV2CV:
5272 if (svtype != SVt_PVCV)
5273 badtype = "a CODE";
5274 break;
5275 }
5276 if (badtype)
cea2e8a9 5277 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5278 return o;
5279 }
2d8e6c8d 5280 name = SvPV(kidsv, n_a);
3280af22 5281 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5282 char *badthing = Nullch;
5dc0d613 5283 switch (o->op_type) {
44a8e56a 5284 case OP_RV2SV:
5285 badthing = "a SCALAR";
5286 break;
5287 case OP_RV2AV:
5288 badthing = "an ARRAY";
5289 break;
5290 case OP_RV2HV:
5291 badthing = "a HASH";
5292 break;
5293 }
5294 if (badthing)
cea2e8a9 5295 Perl_croak(aTHX_
44a8e56a 5296 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5297 name, badthing);
5298 }
93233ece
CS		 5299 /*
5300 * This is a little tricky. We only want to add the symbol if we
5301 * didn't add it in the lexer. Otherwise we get duplicate strict
5302 * warnings. But if we didn't add it in the lexer, we must at
5303 * least pretend like we wanted to add it even if it existed before,
5304 * or we get possible typo warnings. OPpCONST_ENTERED says
5305 * whether the lexer already added THIS instance of this symbol.
5306 */
5196be3e 5307 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5308 do {
44a8e56a 5309 gv = gv_fetchpv(name,
748a9306 5310 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5311 iscv
5312 ? SVt_PVCV
11343788 5313 : o->op_type == OP_RV2SV
a0d0e21e 5314 ? SVt_PV
11343788 5315 : o->op_type == OP_RV2AV
a0d0e21e 5316 ? SVt_PVAV
11343788 5317 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5318 ? SVt_PVHV
5319 : SVt_PVGV);
93233ece
CS		 5320 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5321 if (gv) {
5322 kid->op_type = OP_GV;
5323 SvREFCNT_dec(kid->op_sv);
350de78d 5324#ifdef USE_ITHREADS
638eceb6 5325 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5326 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5327 GvIN_PAD_on(gv);
350de78d
GS		 5328 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5329#else
93233ece 5330 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5331#endif
76cd736e 5332 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5333 }
79072805 5334 }
11343788 5335 return o;
79072805
LW		 5336}
5337
5338OP *
cea2e8a9 5339Perl_ck_ftst(pTHX_ OP *o)
79072805 5340{
11343788
MB		 5341 dTHR;
5342 I32 type = o->op_type;
79072805 5343
d0dca557
JD		 5344 if (o->op_flags & OPf_REF) {
5345 /* nothing */
5346 }
5347 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5348 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5349
5350 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5351 STRLEN n_a;
a0d0e21e 5352 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5353 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5354 op_free(o);
d0dca557 5355 o = newop;
79072805
LW		 5356 }
5357 }
5358 else {
11343788 5359 op_free(o);
79072805 5360 if (type == OP_FTTTY)
d0dca557 5361 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5362 SVt_PVIO));
79072805 5363 else
d0dca557 5364 o = newUNOP(type, 0, newDEFSVOP());
79072805 5365 }
d0dca557
JD		 5366#ifdef USE_LOCALE
5367 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5368 o->op_private = 0;
5369 if (PL_hints & HINT_LOCALE)
5370 o->op_private |= OPpLOCALE;
5371 }
5372#endif
11343788 5373 return o;
79072805
LW		 5374}
5375
5376OP *
cea2e8a9 5377Perl_ck_fun(pTHX_ OP *o)
79072805 5378{
11343788 5379 dTHR;
79072805
LW		 5380 register OP *kid;
5381 OP **tokid;
5382 OP *sibl;
5383 I32 numargs = 0;
11343788 5384 int type = o->op_type;
22c35a8c 5385 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5386
11343788 5387 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5388 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5389 oa &= ~OA_OPTIONAL;
5390 else
11343788 5391 return no_fh_allowed(o);
79072805
LW		 5392 }
5393
11343788 5394 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5395 STRLEN n_a;
11343788
MB		 5396 tokid = &cLISTOPo->op_first;
5397 kid = cLISTOPo->op_first;
8990e307 5398 if (kid->op_type == OP_PUSHMARK ||
155aba94 5399 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5400 {
79072805
LW		 5401 tokid = &kid->op_sibling;
5402 kid = kid->op_sibling;
5403 }
22c35a8c 5404 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5405 *tokid = kid = newDEFSVOP();
79072805
LW		 5406
5407 while (oa && kid) {
5408 numargs++;
5409 sibl = kid->op_sibling;
5410 switch (oa & 7) {
5411 case OA_SCALAR:
62c18ce2
GS		 5412 /* list seen where single (scalar) arg expected? */
5413 if (numargs == 1 && !(oa >> 4)
5414 && kid->op_type == OP_LIST && type != OP_SCALAR)
5415 {
5416 return too_many_arguments(o,PL_op_desc[type]);
5417 }
79072805
LW		 5418 scalar(kid);
5419 break;
5420 case OA_LIST:
5421 if (oa < 16) {
5422 kid = 0;
5423 continue;
5424 }
5425 else
5426 list(kid);
5427 break;
5428 case OA_AVREF:
5429 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5430 (kid->op_private & OPpCONST_BARE))
5431 {
2d8e6c8d 5432 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5433 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5434 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5435 if (ckWARN(WARN_DEPRECATED))
5436 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5437 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5438 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5439 op_free(kid);
5440 kid = newop;
5441 kid->op_sibling = sibl;
5442 *tokid = kid;
5443 }
8990e307 5444 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5445 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5446 mod(kid, type);
79072805
LW		 5447 break;
5448 case OA_HVREF:
5449 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5450 (kid->op_private & OPpCONST_BARE))
5451 {
2d8e6c8d 5452 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5453 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5454 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5455 if (ckWARN(WARN_DEPRECATED))
5456 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5457 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5458 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5459 op_free(kid);
5460 kid = newop;
5461 kid->op_sibling = sibl;
5462 *tokid = kid;
5463 }
8990e307 5464 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5465 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5466 mod(kid, type);
79072805
LW		 5467 break;
5468 case OA_CVREF:
5469 {
a0d0e21e 5470 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5471 kid->op_sibling = 0;
5472 linklist(kid);
5473 newop->op_next = newop;
5474 kid = newop;
5475 kid->op_sibling = sibl;
5476 *tokid = kid;
5477 }
5478 break;
5479 case OA_FILEREF:
c340be78 5480 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5481 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5482 (kid->op_private & OPpCONST_BARE))
5483 {
79072805 5484 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5485 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5486 SVt_PVIO) );
79072805
LW		 5487 op_free(kid);
5488 kid = newop;
5489 }
1ea32a52
GS		 5490 else if (kid->op_type == OP_READLINE) {
5491 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5492 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5493 }
79072805 5494 else {
35cd451c 5495 I32 flags = OPf_SPECIAL;
a6c40364 5496 I32 priv = 0;
2c8ac474
GS		 5497 PADOFFSET targ = 0;
5498
35cd451c 5499 /* is this op a FH constructor? */
853846ea 5500 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5501 char *name = Nullch;
5502 STRLEN len;
5503
5504 flags = 0;
5505 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5506 * need to "prove" flag does not mean something
5507 * else already - NI-S 1999/05/07
2c8ac474
GS		 5508 */
5509 priv = OPpDEREF;
5510 if (kid->op_type == OP_PADSV) {
5511 SV **namep = av_fetch(PL_comppad_name,
5512 kid->op_targ, 4);
5513 if (namep && *namep)
5514 name = SvPV(*namep, len);
5515 }
5516 else if (kid->op_type == OP_RV2SV
5517 && kUNOP->op_first->op_type == OP_GV)
5518 {
5519 GV *gv = cGVOPx_gv(kUNOP->op_first);
5520 name = GvNAME(gv);
5521 len = GvNAMELEN(gv);
5522 }
afd1915d
GS		 5523 else if (kid->op_type == OP_AELEM
5524 || kid->op_type == OP_HELEM)
5525 {
5526 name = "__ANONIO__";
5527 len = 10;
5528 mod(kid,type);
5529 }
2c8ac474
GS		 5530 if (name) {
5531 SV *namesv;
5532 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5533 namesv = PL_curpad[targ];
155aba94 5534 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5535 if (*name != '$')
5536 sv_setpvn(namesv, "$", 1);
5537 sv_catpvn(namesv, name, len);
5538 }
853846ea 5539 }
79072805 5540 kid->op_sibling = 0;
35cd451c 5541 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5542 kid->op_targ = targ;
5543 kid->op_private |= priv;
79072805
LW		 5544 }
5545 kid->op_sibling = sibl;
5546 *tokid = kid;
5547 }
5548 scalar(kid);
5549 break;
5550 case OA_SCALARREF:
a0d0e21e 5551 mod(scalar(kid), type);
79072805
LW		 5552 break;
5553 }
5554 oa >>= 4;
5555 tokid = &kid->op_sibling;
5556 kid = kid->op_sibling;
5557 }
11343788 5558 o->op_private |= numargs;
79072805 5559 if (kid)
22c35a8c 5560 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5561 listkids(o);
79072805 5562 }
22c35a8c 5563 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5564 op_free(o);
54b9620d 5565 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5566 }
5567
79072805
LW		 5568 if (oa) {
5569 while (oa & OA_OPTIONAL)
5570 oa >>= 4;
5571 if (oa && oa != OA_LIST)
22c35a8c 5572 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5573 }
11343788 5574 return o;
79072805
LW		 5575}
5576
5577OP *
cea2e8a9 5578Perl_ck_glob(pTHX_ OP *o)
79072805 5579{
fb73857a 5580 GV *gv;
5581
649da076 5582 o = ck_fun(o);
1f2bfc8a 5583 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5584 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5585
5586 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5587 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5588
52bb0670 5589#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5590 /* XXX this can be tightened up and made more failsafe. */
5591 if (!gv) {
72b16652 5592 ENTER;
e4783991
GS		 5593 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5594 /* null-terminated import list */
5595 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5596 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5597 LEAVE;
5598 }
52bb0670 5599#endif /* PERL_EXTERNAL_GLOB */
72b16652 5600
b1cb66bf 5601 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5602 append_elem(OP_GLOB, o,
80252599 5603 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5604 o->op_type = OP_LIST;
22c35a8c 5605 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5606 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5607 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5608 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5609 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5610 scalar(newUNOP(OP_RV2CV, 0,
5611 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5612 o = newUNOP(OP_NULL, 0, ck_subr(o));
5613 o->op_targ = OP_GLOB; /* hint at what it used to be */
5614 return o;
b1cb66bf 5615 }
5616 gv = newGVgen("main");
a0d0e21e 5617 gv_IOadd(gv);
11343788
MB		 5618 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5619 scalarkids(o);
649da076 5620 return o;
79072805
LW		 5621}
5622
5623OP *
cea2e8a9 5624Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5625{
5626 LOGOP *gwop;
5627 OP *kid;
11343788 5628 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5629
22c35a8c 5630 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5631 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5632
11343788 5633 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5634 OP* k;
11343788
MB		 5635 o = ck_sort(o);
5636 kid = cLISTOPo->op_first->op_sibling;
5637 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5638 kid = k;
5639 }
5640 kid->op_next = (OP*)gwop;
11343788 5641 o->op_flags &= ~OPf_STACKED;
93a17b20 5642 }
11343788 5643 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5644 if (type == OP_MAPWHILE)
5645 list(kid);
5646 else
5647 scalar(kid);
11343788 5648 o = ck_fun(o);
3280af22 5649 if (PL_error_count)
11343788 5650 return o;
aeea060c 5651 kid = cLISTOPo->op_first->op_sibling;
79072805 5652 if (kid->op_type != OP_NULL)
cea2e8a9 5653 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5654 kid = kUNOP->op_first;
5655
a0d0e21e 5656 gwop->op_type = type;
22c35a8c 5657 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5658 gwop->op_first = listkids(o);
79072805
LW		 5659 gwop->op_flags |= OPf_KIDS;
5660 gwop->op_private = 1;
5661 gwop->op_other = LINKLIST(kid);
a0d0e21e 5662 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5663 kid->op_next = (OP*)gwop;
5664
11343788 5665 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5666 if (!kid || !kid->op_sibling)
22c35a8c 5667 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5668 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5669 mod(kid, OP_GREPSTART);
5670
79072805
LW		 5671 return (OP*)gwop;
5672}
5673
5674OP *
cea2e8a9 5675Perl_ck_index(pTHX_ OP *o)
79072805 5676{
11343788
MB		 5677 if (o->op_flags & OPf_KIDS) {
5678 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5679 if (kid)
5680 kid = kid->op_sibling; /* get past "big" */
79072805 5681 if (kid && kid->op_type == OP_CONST)
2779dcf1 5682 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5683 }
11343788 5684 return ck_fun(o);
79072805
LW		 5685}
5686
5687OP *
cea2e8a9 5688Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5689{
5690 /* XXX length optimization goes here */
11343788 5691 return ck_fun(o);
79072805
LW		 5692}
5693
5694OP *
cea2e8a9 5695Perl_ck_lfun(pTHX_ OP *o)
79072805 5696{
5dc0d613
MB		 5697 OPCODE type = o->op_type;
5698 return modkids(ck_fun(o), type);
79072805
LW		 5699}
5700
5701OP *
cea2e8a9 5702Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5703{
20ce7b12 5704 dTHR;
d0334bed
GS		 5705 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5706 switch (cUNOPo->op_first->op_type) {
5707 case OP_RV2AV:
7e291ef1 5708 break; /* Globals via GV can be undef */
d0334bed
GS		 5709 case OP_PADAV:
5710 case OP_AASSIGN: /* Is this a good idea? */
5711 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5712 "defined(@array) is deprecated");
d0334bed
GS		 5713 Perl_warner(aTHX_ WARN_DEPRECATED,
5714 "(Maybe you should just omit the defined()?)\n");
69794302 5715 break;
d0334bed 5716 case OP_RV2HV:
7e291ef1 5717 break; /* Globals via GV can be undef */
d0334bed
GS		 5718 case OP_PADHV:
5719 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5720 "defined(%%hash) is deprecated");
d0334bed
GS		 5721 Perl_warner(aTHX_ WARN_DEPRECATED,
5722 "(Maybe you should just omit the defined()?)\n");
5723 break;
5724 default:
5725 /* no warning */
5726 break;
5727 }
69794302
MJD		 5728 }
5729 return ck_rfun(o);
5730}
5731
5732OP *
cea2e8a9 5733Perl_ck_rfun(pTHX_ OP *o)
8990e307 5734{
5dc0d613
MB		 5735 OPCODE type = o->op_type;
5736 return refkids(ck_fun(o), type);
8990e307
LW		 5737}
5738
5739OP *
cea2e8a9 5740Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5741{
5742 register OP *kid;
aeea060c 5743
11343788 5744 kid = cLISTOPo->op_first;
79072805 5745 if (!kid) {
11343788
MB		 5746 o = force_list(o);
5747 kid = cLISTOPo->op_first;
79072805
LW		 5748 }
5749 if (kid->op_type == OP_PUSHMARK)
5750 kid = kid->op_sibling;
11343788 5751 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5752 kid = kid->op_sibling;
5753 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5754 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5755 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5756 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5757 cLISTOPo->op_first->op_sibling = kid;
5758 cLISTOPo->op_last = kid;
79072805
LW		 5759 kid = kid->op_sibling;
5760 }
5761 }
5762
5763 if (!kid)
54b9620d 5764 append_elem(o->op_type, o, newDEFSVOP());
79072805 5765
5dc0d613 5766 o = listkids(o);
bbce6d69 5767
5dc0d613 5768 o->op_private = 0;
36477c24 5769#ifdef USE_LOCALE
3280af22 5770 if (PL_hints & HINT_LOCALE)
5dc0d613 5771 o->op_private |= OPpLOCALE;
bbce6d69 5772#endif
5773
5dc0d613 5774 return o;
bbce6d69 5775}
5776
5777OP *
cea2e8a9 5778Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5779{
5dc0d613 5780 o = ck_fun(o);
bbce6d69 5781
5dc0d613 5782 o->op_private = 0;
36477c24 5783#ifdef USE_LOCALE
3280af22 5784 if (PL_hints & HINT_LOCALE)
5dc0d613 5785 o->op_private |= OPpLOCALE;
bbce6d69 5786#endif
5787
5dc0d613 5788 return o;
bbce6d69 5789}
5790
5791OP *
b162f9ea
IZ		 5792Perl_ck_sassign(pTHX_ OP *o)
5793{
5794 OP *kid = cLISTOPo->op_first;
5795 /* has a disposable target? */
5796 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5797 && !(kid->op_flags & OPf_STACKED)
5798 /* Cannot steal the second time! */
5799 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5800 {
5801 OP *kkid = kid->op_sibling;
5802
5803 /* Can just relocate the target. */
2c2d71f5
JH		 5804 if (kkid && kkid->op_type == OP_PADSV
5805 && !(kkid->op_private & OPpLVAL_INTRO))
5806 {
b162f9ea 5807 kid->op_targ = kkid->op_targ;
743e66e6 5808 kkid->op_targ = 0;
b162f9ea
IZ		 5809 /* Now we do not need PADSV and SASSIGN. */
5810 kid->op_sibling = o->op_sibling; /* NULL */
5811 cLISTOPo->op_first = NULL;
5812 op_free(o);
5813 op_free(kkid);
5814 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5815 return kid;
5816 }
5817 }
5818 return o;
5819}
5820
5821OP *
cea2e8a9 5822Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5823{
5dc0d613 5824 o->op_private = 0;
36477c24 5825#ifdef USE_LOCALE
3280af22 5826 if (PL_hints & HINT_LOCALE)
5dc0d613 5827 o->op_private |= OPpLOCALE;
bbce6d69 5828#endif
36477c24 5829
5dc0d613 5830 return o;
79072805
LW		 5831}
5832
5833OP *
cea2e8a9 5834Perl_ck_match(pTHX_ OP *o)
79072805 5835{
5dc0d613 5836 o->op_private |= OPpRUNTIME;
11343788 5837 return o;
79072805
LW		 5838}
5839
5840OP *
f5d5a27c
CS		 5841Perl_ck_method(pTHX_ OP *o)
5842{
5843 OP *kid = cUNOPo->op_first;
5844 if (kid->op_type == OP_CONST) {
5845 SV* sv = kSVOP->op_sv;
5846 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5847 OP *cmop;
155aba94
GS		 5848 (void)SvUPGRADE(sv, SVt_PVIV);
5849 (void)SvIOK_on(sv);
f5d5a27c
CS		 5850 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5851 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5852 kSVOP->op_sv = Nullsv;
5853 op_free(o);
5854 return cmop;
5855 }
5856 }
5857 return o;
5858}
5859
5860OP *
cea2e8a9 5861Perl_ck_null(pTHX_ OP *o)
79072805 5862{
11343788 5863 return o;
79072805
LW		 5864}
5865
5866OP *
16fe6d59
GS		 5867Perl_ck_open(pTHX_ OP *o)
5868{
5869 HV *table = GvHV(PL_hintgv);
5870 if (table) {
5871 SV **svp;
5872 I32 mode;
5873 svp = hv_fetch(table, "open_IN", 7, FALSE);
5874 if (svp && *svp) {
5875 mode = mode_from_discipline(*svp);
5876 if (mode & O_BINARY)
5877 o->op_private |= OPpOPEN_IN_RAW;
5878 else if (mode & O_TEXT)
5879 o->op_private |= OPpOPEN_IN_CRLF;
5880 }
5881
5882 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5883 if (svp && *svp) {
5884 mode = mode_from_discipline(*svp);
5885 if (mode & O_BINARY)
5886 o->op_private |= OPpOPEN_OUT_RAW;
5887 else if (mode & O_TEXT)
5888 o->op_private |= OPpOPEN_OUT_CRLF;
5889 }
5890 }
5891 if (o->op_type == OP_BACKTICK)
5892 return o;
5893 return ck_fun(o);
5894}
5895
5896OP *
cea2e8a9 5897Perl_ck_repeat(pTHX_ OP *o)
79072805 5898{
11343788
MB		 5899 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5900 o->op_private |= OPpREPEAT_DOLIST;
5901 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5902 }
5903 else
11343788
MB		 5904 scalar(o);
5905 return o;
79072805
LW		 5906}
5907
5908OP *
cea2e8a9 5909Perl_ck_require(pTHX_ OP *o)
8990e307 5910{
11343788
MB		 5911 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5912 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5913
5914 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5915 char *s;
a0d0e21e
LW		 5916 for (s = SvPVX(kid->op_sv); *s; s++) {
5917 if (*s == ':' && s[1] == ':') {
5918 *s = '/';
1aef975c 5919 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5920 --SvCUR(kid->op_sv);
5921 }
8990e307 5922 }
ce3b816e
GS		 5923 if (SvREADONLY(kid->op_sv)) {
5924 SvREADONLY_off(kid->op_sv);
5925 sv_catpvn(kid->op_sv, ".pm", 3);
5926 SvREADONLY_on(kid->op_sv);
5927 }
5928 else
5929 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5930 }
5931 }
11343788 5932 return ck_fun(o);
8990e307
LW		 5933}
5934
22c35a8c 5935#if 0
8990e307 5936OP *
cea2e8a9 5937Perl_ck_retarget(pTHX_ OP *o)
79072805 5938{
cea2e8a9 5939 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5940 /* STUB */
11343788 5941 return o;
79072805 5942}
22c35a8c 5943#endif
79072805
LW		 5944
5945OP *
cea2e8a9 5946Perl_ck_select(pTHX_ OP *o)
79072805 5947{
c07a80fd 5948 OP* kid;
11343788
MB		 5949 if (o->op_flags & OPf_KIDS) {
5950 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5951 if (kid && kid->op_sibling) {
11343788 5952 o->op_type = OP_SSELECT;
22c35a8c 5953 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5954 o = ck_fun(o);
5955 return fold_constants(o);
79072805
LW		 5956 }
5957 }
11343788
MB		 5958 o = ck_fun(o);
5959 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5960 if (kid && kid->op_type == OP_RV2GV)
5961 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5962 return o;
79072805
LW		 5963}
5964
5965OP *
cea2e8a9 5966Perl_ck_shift(pTHX_ OP *o)
79072805 5967{
11343788 5968 I32 type = o->op_type;
79072805 5969
11343788 5970 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5971 OP *argop;
5972
11343788 5973 op_free(o);
6d4ff0d2 5974#ifdef USE_THREADS
533c011a 5975 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5976 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5977 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5978 }
5979 else {
5980 argop = newUNOP(OP_RV2AV, 0,
5981 scalar(newGVOP(OP_GV, 0,
5982 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5983 }
5984#else
5985 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5986 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5987 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5988#endif /* USE_THREADS */
5989 return newUNOP(type, 0, scalar(argop));
79072805 5990 }
11343788 5991 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5992}
5993
5994OP *
cea2e8a9 5995Perl_ck_sort(pTHX_ OP *o)
79072805 5996{
5dc0d613 5997 o->op_private = 0;
36477c24 5998#ifdef USE_LOCALE
3280af22 5999 if (PL_hints & HINT_LOCALE)
5dc0d613 6000 o->op_private |= OPpLOCALE;
bbce6d69 6001#endif
6002
9ea6e965 6003 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6004 simplify_sort(o);
9c007264 6005 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 6006 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 6007 OP *k;
82092f1d 6008 kid = kUNOP->op_first; /* get past null */
79072805 6009
463ee0b2 6010 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6011 linklist(kid);
463ee0b2
LW		 6012 if (kid->op_type == OP_SCOPE) {
6013 k = kid->op_next;
6014 kid->op_next = 0;
79072805 6015 }
463ee0b2 6016 else if (kid->op_type == OP_LEAVE) {
11343788 6017 if (o->op_type == OP_SORT) {
748a9306
LW		 6018 null(kid); /* wipe out leave */
6019 kid->op_next = kid;
463ee0b2 6020
748a9306
LW		 6021 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6022 if (k->op_next == kid)
6023 k->op_next = 0;
71a29c3c
GS		 6024 /* don't descend into loops */
6025 else if (k->op_type == OP_ENTERLOOP
6026 || k->op_type == OP_ENTERITER)
6027 {
6028 k = cLOOPx(k)->op_lastop;
6029 }
748a9306 6030 }
463ee0b2 6031 }
748a9306
LW		 6032 else
6033 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6034 k = kLISTOP->op_first;
463ee0b2 6035 }
a0d0e21e
LW		 6036 peep(k);
6037
11343788 6038 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 6039 if (o->op_type == OP_SORT)
a0d0e21e
LW		 6040 kid->op_next = kid;
6041 else
6042 kid->op_next = k;
11343788 6043 o->op_flags |= OPf_SPECIAL;
79072805 6044 }
c6e96bcb
GS		 6045 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
6046 null(cLISTOPo->op_first->op_sibling);
79072805 6047 }
bbce6d69 6048
11343788 6049 return o;
79072805 6050}
bda4119b
GS		 6051
6052STATIC void
cea2e8a9 6053S_simplify_sort(pTHX_ OP *o)
9c007264 6054{
51a19bc0 6055 dTHR;
9c007264
JH		 6056 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6057 OP *k;
6058 int reversed;
350de78d 6059 GV *gv;
9c007264
JH		 6060 if (!(o->op_flags & OPf_STACKED))
6061 return;
9ea6e965
GS		 6062 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6063 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6064 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6065 if (kid->op_type != OP_SCOPE)
6066 return;
6067 kid = kLISTOP->op_last; /* get past scope */
6068 switch(kid->op_type) {
6069 case OP_NCMP:
6070 case OP_I_NCMP:
6071 case OP_SCMP:
6072 break;
6073 default:
6074 return;
6075 }
6076 k = kid; /* remember this node*/
6077 if (kBINOP->op_first->op_type != OP_RV2SV)
6078 return;
6079 kid = kBINOP->op_first; /* get past cmp */
6080 if (kUNOP->op_first->op_type != OP_GV)
6081 return;
6082 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6083 gv = kGVOP_gv;
350de78d 6084 if (GvSTASH(gv) != PL_curstash)
9c007264 6085 return;
350de78d 6086 if (strEQ(GvNAME(gv), "a"))
9c007264 6087 reversed = 0;
0f79a09d 6088 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6089 reversed = 1;
6090 else
6091 return;
6092 kid = k; /* back to cmp */
6093 if (kBINOP->op_last->op_type != OP_RV2SV)
6094 return;
6095 kid = kBINOP->op_last; /* down to 2nd arg */
6096 if (kUNOP->op_first->op_type != OP_GV)
6097 return;
6098 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6099 gv = kGVOP_gv;
350de78d 6100 if (GvSTASH(gv) != PL_curstash
9c007264 6101 || ( reversed
350de78d
GS		 6102 ? strNE(GvNAME(gv), "a")
6103 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6104 return;
6105 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6106 if (reversed)
6107 o->op_private |= OPpSORT_REVERSE;
6108 if (k->op_type == OP_NCMP)
6109 o->op_private |= OPpSORT_NUMERIC;
6110 if (k->op_type == OP_I_NCMP)
6111 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6112 kid = cLISTOPo->op_first->op_sibling;
6113 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6114 op_free(kid); /* then delete it */
6115 cLISTOPo->op_children--;
9c007264 6116}
79072805
LW		 6117
6118OP *
cea2e8a9 6119Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6120{
6121 register OP *kid;
aeea060c 6122
11343788
MB		 6123 if (o->op_flags & OPf_STACKED)
6124 return no_fh_allowed(o);
79072805 6125
11343788 6126 kid = cLISTOPo->op_first;
8990e307 6127 if (kid->op_type != OP_NULL)
cea2e8a9 6128 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6129 kid = kid->op_sibling;
11343788
MB		 6130 op_free(cLISTOPo->op_first);
6131 cLISTOPo->op_first = kid;
85e6fe83 6132 if (!kid) {
79cb57f6 6133 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6134 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6135 }
79072805
LW		 6136
6137 if (kid->op_type != OP_MATCH) {
6138 OP *sibl = kid->op_sibling;
463ee0b2 6139 kid->op_sibling = 0;
79072805 6140 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6141 if (cLISTOPo->op_first == cLISTOPo->op_last)
6142 cLISTOPo->op_last = kid;
6143 cLISTOPo->op_first = kid;
79072805
LW		 6144 kid->op_sibling = sibl;
6145 }
6146
6147 kid->op_type = OP_PUSHRE;
22c35a8c 6148 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6149 scalar(kid);
6150
6151 if (!kid->op_sibling)
54b9620d 6152 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6153
6154 kid = kid->op_sibling;
6155 scalar(kid);
6156
6157 if (!kid->op_sibling)
11343788 6158 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6159
6160 kid = kid->op_sibling;
6161 scalar(kid);
6162
6163 if (kid->op_sibling)
22c35a8c 6164 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6165
11343788 6166 return o;
79072805
LW		 6167}
6168
6169OP *
eb6e2d6f
GS		 6170Perl_ck_join(pTHX_ OP *o)
6171{
6172 if (ckWARN(WARN_SYNTAX)) {
6173 OP *kid = cLISTOPo->op_first->op_sibling;
6174 if (kid && kid->op_type == OP_MATCH) {
6175 char *pmstr = "STRING";
6176 if (kPMOP->op_pmregexp)
6177 pmstr = kPMOP->op_pmregexp->precomp;
6178 Perl_warner(aTHX_ WARN_SYNTAX,
6179 "/%s/ should probably be written as \"%s\"",
6180 pmstr, pmstr);
6181 }
6182 }
6183 return ck_fun(o);
6184}
6185
6186OP *
cea2e8a9 6187Perl_ck_subr(pTHX_ OP *o)
79072805 6188{
11343788
MB		 6189 dTHR;
6190 OP *prev = ((cUNOPo->op_first->op_sibling)
6191 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6192 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6193 OP *cvop;
6194 char *proto = 0;
6195 CV *cv = 0;
46fc3d4c 6196 GV *namegv = 0;
4633a7c4
LW		 6197 int optional = 0;
6198 I32 arg = 0;
2d8e6c8d 6199 STRLEN n_a;
4633a7c4 6200
d3011074 6201 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6202 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6203 if (cvop->op_type == OP_RV2CV) {
6204 SVOP* tmpop;
11343788 6205 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6206 null(cvop); /* disable rv2cv */
6207 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6208 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6209 GV *gv = cGVOPx_gv(tmpop);
350de78d 6210 cv = GvCVu(gv);
76cd736e
GS		 6211 if (!cv)
6212 tmpop->op_private |= OPpEARLY_CV;
6213 else if (SvPOK(cv)) {
350de78d 6214 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6215 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6216 }
4633a7c4
LW		 6217 }
6218 }
f5d5a27c 6219 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6220 if (o2->op_type == OP_CONST)
6221 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6222 else if (o2->op_type == OP_LIST) {
6223 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6224 if (o && o->op_type == OP_CONST)
6225 o->op_private &= ~OPpCONST_STRICT;
6226 }
7a52d87a 6227 }
3280af22
NIS		 6228 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6229 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6230 o->op_private |= OPpENTERSUB_DB;
6231 while (o2 != cvop) {
4633a7c4
LW		 6232 if (proto) {
6233 switch (*proto) {
6234 case '\0':
5dc0d613 6235 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6236 case ';':
6237 optional = 1;
6238 proto++;
6239 continue;
6240 case '$':
6241 proto++;
6242 arg++;
11343788 6243 scalar(o2);
4633a7c4
LW		 6244 break;
6245 case '%':
6246 case '@':
11343788 6247 list(o2);
4633a7c4
LW		 6248 arg++;
6249 break;
6250 case '&':
6251 proto++;
6252 arg++;
11343788 6253 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 6254 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 6255 break;
6256 case '*':
2ba6ecf4 6257 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6258 proto++;
6259 arg++;
11343788 6260 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6261 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6262 else if (o2->op_type == OP_CONST)
6263 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6264 else if (o2->op_type == OP_ENTERSUB) {
6265 /* accidental subroutine, revert to bareword */
6266 OP *gvop = ((UNOP*)o2)->op_first;
6267 if (gvop && gvop->op_type == OP_NULL) {
6268 gvop = ((UNOP*)gvop)->op_first;
6269 if (gvop) {
6270 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6271 ;
6272 if (gvop &&
6273 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6274 (gvop = ((UNOP*)gvop)->op_first) &&
6275 gvop->op_type == OP_GV)
6276 {
638eceb6 6277 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6278 OP *sibling = o2->op_sibling;
2692f720 6279 SV *n = newSVpvn("",0);
9675f7ac 6280 op_free(o2);
2692f720
GS		 6281 gv_fullname3(n, gv, "");
6282 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6283 sv_chop(n, SvPVX(n)+6);
6284 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6285 prev->op_sibling = o2;
6286 o2->op_sibling = sibling;
6287 }
6288 }
6289 }
6290 }
2ba6ecf4
GS		 6291 scalar(o2);
6292 break;
4633a7c4
LW		 6293 case '\\':
6294 proto++;
6295 arg++;
6296 switch (*proto++) {
6297 case '*':
11343788 6298 if (o2->op_type != OP_RV2GV)
5dc0d613 6299 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6300 goto wrapref;
6301 case '&':
11343788 6302 if (o2->op_type != OP_RV2CV)
5dc0d613 6303 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 6304 goto wrapref;
6305 case '$':
386acf99
GS		 6306 if (o2->op_type != OP_RV2SV
6307 && o2->op_type != OP_PADSV
1c01eb51
GS		 6308 && o2->op_type != OP_HELEM
6309 && o2->op_type != OP_AELEM
386acf99
GS		 6310 && o2->op_type != OP_THREADSV)
6311 {
5dc0d613 6312 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6313 }
4633a7c4
LW		 6314 goto wrapref;
6315 case '@':
11343788 6316 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6317 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6318 goto wrapref;
6319 case '%':
11343788 6320 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6321 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6322 wrapref:
6323 {
11343788 6324 OP* kid = o2;
6fa846a0 6325 OP* sib = kid->op_sibling;
4633a7c4 6326 kid->op_sibling = 0;
6fa846a0
GS		 6327 o2 = newUNOP(OP_REFGEN, 0, kid);
6328 o2->op_sibling = sib;
e858de61 6329 prev->op_sibling = o2;
4633a7c4
LW		 6330 }
6331 break;
6332 default: goto oops;
6333 }
6334 break;
b1cb66bf 6335 case ' ':
6336 proto++;
6337 continue;
4633a7c4
LW		 6338 default:
6339 oops:
cea2e8a9 6340 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6341 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6342 }
6343 }
6344 else
11343788
MB		 6345 list(o2);
6346 mod(o2, OP_ENTERSUB);
6347 prev = o2;
6348 o2 = o2->op_sibling;
4633a7c4 6349 }
fb73857a 6350 if (proto && !optional &&
6351 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6352 return too_few_arguments(o, gv_ename(namegv));
11343788 6353 return o;
79072805
LW		 6354}
6355
6356OP *
cea2e8a9 6357Perl_ck_svconst(pTHX_ OP *o)
8990e307 6358{
11343788
MB		 6359 SvREADONLY_on(cSVOPo->op_sv);
6360 return o;
8990e307
LW		 6361}
6362
6363OP *
cea2e8a9 6364Perl_ck_trunc(pTHX_ OP *o)
79072805 6365{
11343788
MB		 6366 if (o->op_flags & OPf_KIDS) {
6367 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6368
a0d0e21e
LW		 6369 if (kid->op_type == OP_NULL)
6370 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6371 if (kid && kid->op_type == OP_CONST &&
6372 (kid->op_private & OPpCONST_BARE))
6373 {
11343788 6374 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6375 kid->op_private &= ~OPpCONST_STRICT;
6376 }
79072805 6377 }
11343788 6378 return ck_fun(o);
79072805
LW		 6379}
6380
463ee0b2
LW		 6381/* A peephole optimizer. We visit the ops in the order they're to execute. */
6382
79072805 6383void
864dbfa3 6384Perl_peep(pTHX_ register OP *o)
79072805 6385{
11343788 6386 dTHR;
79072805 6387 register OP* oldop = 0;
2d8e6c8d 6388 STRLEN n_a;
cd06dffe 6389 OP *last_composite = Nullop;
2d8e6c8d 6390
a0d0e21e 6391 if (!o || o->op_seq)
79072805 6392 return;
a0d0e21e 6393 ENTER;
462e5cf6 6394 SAVEOP();
7766f137 6395 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6396 for (; o; o = o->op_next) {
6397 if (o->op_seq)
6398 break;
3280af22
NIS		 6399 if (!PL_op_seqmax)
6400 PL_op_seqmax++;
533c011a 6401 PL_op = o;
a0d0e21e 6402 switch (o->op_type) {
acb36ea4 6403 case OP_SETSTATE:
a0d0e21e
LW		 6404 case OP_NEXTSTATE:
6405 case OP_DBSTATE:
3280af22
NIS		 6406 PL_curcop = ((COP*)o); /* for warnings */
6407 o->op_seq = PL_op_seqmax++;
cd06dffe 6408 last_composite = Nullop;
a0d0e21e
LW		 6409 break;
6410
a0d0e21e 6411 case OP_CONST:
7a52d87a
GS		 6412 if (cSVOPo->op_private & OPpCONST_STRICT)
6413 no_bareword_allowed(o);
7766f137
GS		 6414#ifdef USE_ITHREADS
6415 /* Relocate sv to the pad for thread safety.
6416 * Despite being a "constant", the SV is written to,
6417 * for reference counts, sv_upgrade() etc. */
6418 if (cSVOP->op_sv) {
6419 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6420 SvREFCNT_dec(PL_curpad[ix]);
6421 SvPADTMP_on(cSVOPo->op_sv);
6422 PL_curpad[ix] = cSVOPo->op_sv;
6423 cSVOPo->op_sv = Nullsv;
6424 o->op_targ = ix;
6425 }
6426#endif
07447971
GS		 6427 o->op_seq = PL_op_seqmax++;
6428 break;
6429
ed7ab888 6430 case OP_CONCAT:
b162f9ea
IZ		 6431 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6432 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6433 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6434 goto ignore_optimization;
cd06dffe 6435 else {
07447971 6436 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6437 o->op_targ = o->op_next->op_targ;
743e66e6 6438 o->op_next->op_targ = 0;
2c2d71f5 6439 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6440 }
6441 }
a0d0e21e 6442 null(o->op_next);
b162f9ea
IZ		 6443 }
6444 ignore_optimization:
3280af22 6445 o->op_seq = PL_op_seqmax++;
a0d0e21e 6446 break;
8990e307 6447 case OP_STUB:
54310121 6448 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6449 o->op_seq = PL_op_seqmax++;
54310121 6450 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6451 }
748a9306 6452 goto nothin;
79072805 6453 case OP_NULL:
acb36ea4
GS		 6454 if (o->op_targ == OP_NEXTSTATE
6455 || o->op_targ == OP_DBSTATE
6456 || o->op_targ == OP_SETSTATE)
6457 {
3280af22 6458 PL_curcop = ((COP*)o);
acb36ea4 6459 }
748a9306 6460 goto nothin;
79072805 6461 case OP_SCALAR:
93a17b20 6462 case OP_LINESEQ:
463ee0b2 6463 case OP_SCOPE:
748a9306 6464 nothin:
a0d0e21e
LW		 6465 if (oldop && o->op_next) {
6466 oldop->op_next = o->op_next;
79072805
LW		 6467 continue;
6468 }
3280af22 6469 o->op_seq = PL_op_seqmax++;
79072805
LW		 6470 break;
6471
6472 case OP_GV:
a0d0e21e 6473 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6474 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6475 null(o->op_next);
64aac5a9
GS		 6476 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6477 | OPpOUR_INTRO);
a0d0e21e
LW		 6478 o->op_next = o->op_next->op_next;
6479 o->op_type = OP_GVSV;
22c35a8c 6480 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6481 }
6482 }
a0d0e21e
LW		 6483 else if (o->op_next->op_type == OP_RV2AV) {
6484 OP* pop = o->op_next->op_next;
6485 IV i;
8990e307 6486 if (pop->op_type == OP_CONST &&
533c011a 6487 (PL_op = pop->op_next) &&
8990e307 6488 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6489 !(pop->op_next->op_private &
68dc0745 6490 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6491 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6492 <= 255 &&
8990e307
LW		 6493 i >= 0)
6494 {
350de78d 6495 GV *gv;
a0d0e21e 6496 null(o->op_next);
8990e307
LW		 6497 null(pop->op_next);
6498 null(pop);
a0d0e21e
LW		 6499 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6500 o->op_next = pop->op_next->op_next;
6501 o->op_type = OP_AELEMFAST;
22c35a8c 6502 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6503 o->op_private = (U8)i;
638eceb6 6504 gv = cGVOPo_gv;
350de78d 6505 GvAVn(gv);
8990e307 6506 }
79072805 6507 }
e476b1b5 6508 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6509 GV *gv = cGVOPo_gv;
76cd736e
GS		 6510 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6511 /* XXX could check prototype here instead of just carping */
6512 SV *sv = sv_newmortal();
6513 gv_efullname3(sv, gv, Nullch);
e476b1b5 6514 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6515 "%s() called too early to check prototype",
6516 SvPV_nolen(sv));
6517 }
6518 }
6519
3280af22 6520 o->op_seq = PL_op_seqmax++;
79072805
LW		 6521 break;
6522
a0d0e21e 6523 case OP_MAPWHILE:
79072805
LW		 6524 case OP_GREPWHILE:
6525 case OP_AND:
6526 case OP_OR:
2c2d71f5
JH		 6527 case OP_ANDASSIGN:
6528 case OP_ORASSIGN:
1a67a97c
SM		 6529 case OP_COND_EXPR:
6530 case OP_RANGE:
3280af22 6531 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6532 while (cLOGOP->op_other->op_type == OP_NULL)
6533 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6534 peep(cLOGOP->op_other);
6535 break;
6536
79072805 6537 case OP_ENTERLOOP:
3280af22 6538 o->op_seq = PL_op_seqmax++;
79072805
LW		 6539 peep(cLOOP->op_redoop);
6540 peep(cLOOP->op_nextop);
6541 peep(cLOOP->op_lastop);
6542 break;
6543
8782bef2 6544 case OP_QR:
79072805
LW		 6545 case OP_MATCH:
6546 case OP_SUBST:
3280af22 6547 o->op_seq = PL_op_seqmax++;
a0d0e21e 6548 peep(cPMOP->op_pmreplstart);
79072805
LW		 6549 break;
6550
a0d0e21e 6551 case OP_EXEC:
3280af22 6552 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6553 if (ckWARN(WARN_SYNTAX) && o->op_next
6554 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6555 if (o->op_next->op_sibling &&
20408e3c
GS		 6556 o->op_next->op_sibling->op_type != OP_EXIT &&
6557 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6558 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6559 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6560
57843af0 6561 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6562 Perl_warner(aTHX_ WARN_EXEC,
6563 "Statement unlikely to be reached");
6564 Perl_warner(aTHX_ WARN_EXEC,
6565 "(Maybe you meant system() when you said exec()?)\n");
57843af0 6566 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6567 }
6568 }
6569 break;
aeea060c 6570
c750a3ec
MB		 6571 case OP_HELEM: {
6572 UNOP *rop;
6573 SV *lexname;
6574 GV **fields;
9615e741 6575 SV **svp, **indsvp, *sv;
c750a3ec
MB		 6576 I32 ind;
6577 char *key;
6578 STRLEN keylen;
aeea060c 6579
9615e741 6580 o->op_seq = PL_op_seqmax++;
377b21bb 6581 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6582 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6583 break;
6584 rop = (UNOP*)((BINOP*)o)->op_first;
6585 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6586 break;
3280af22 6587 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6588 if (!SvOBJECT(lexname))
6589 break;
5196be3e 6590 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6591 if (!fields || !GvHV(*fields))
6592 break;
638eceb6 6593 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6594 key = SvPV(*svp, keylen);
6595 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6596 if (!indsvp) {
88e9b055 6597 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6598 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6599 }
6600 ind = SvIV(*indsvp);
6601 if (ind < 1)
cea2e8a9 6602 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6603 rop->op_type = OP_RV2AV;
22c35a8c 6604 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6605 o->op_type = OP_AELEM;
22c35a8c 6606 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6607 sv = newSViv(ind);
6608 if (SvREADONLY(*svp))
6609 SvREADONLY_on(sv);
6610 SvFLAGS(sv) |= (SvFLAGS(*svp)
6611 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6612 SvREFCNT_dec(*svp);
9615e741 6613 *svp = sv;
c750a3ec
MB		 6614 break;
6615 }
345599ca
GS		 6616
6617 case OP_HSLICE: {
6618 UNOP *rop;
6619 SV *lexname;
6620 GV **fields;
9615e741 6621 SV **svp, **indsvp, *sv;
345599ca
GS		 6622 I32 ind;
6623 char *key;
6624 STRLEN keylen;
6625 SVOP *first_key_op, *key_op;
9615e741
GS		 6626
6627 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6628 if ((o->op_private & (OPpLVAL_INTRO))
6629 /* I bet there's always a pushmark... */
6630 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6631 /* hmmm, no optimization if list contains only one key. */
6632 break;
6633 rop = (UNOP*)((LISTOP*)o)->op_last;
6634 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6635 break;
6636 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6637 if (!SvOBJECT(lexname))
6638 break;
6639 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6640 if (!fields || !GvHV(*fields))
6641 break;
6642 /* Again guessing that the pushmark can be jumped over.... */
6643 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6644 ->op_first->op_sibling;
6645 /* Check that the key list contains only constants. */
6646 for (key_op = first_key_op; key_op;
6647 key_op = (SVOP*)key_op->op_sibling)
6648 if (key_op->op_type != OP_CONST)
6649 break;
6650 if (key_op)
6651 break;
6652 rop->op_type = OP_RV2AV;
6653 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6654 o->op_type = OP_ASLICE;
6655 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6656 for (key_op = first_key_op; key_op;
6657 key_op = (SVOP*)key_op->op_sibling) {
6658 svp = cSVOPx_svp(key_op);
6659 key = SvPV(*svp, keylen);
6660 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6661 if (!indsvp) {
9615e741
GS		 6662 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6663 "in variable %s of type %s",
345599ca
GS		 6664 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6665 }
6666 ind = SvIV(*indsvp);
6667 if (ind < 1)
6668 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6669 sv = newSViv(ind);
6670 if (SvREADONLY(*svp))
6671 SvREADONLY_on(sv);
6672 SvFLAGS(sv) |= (SvFLAGS(*svp)
6673 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6674 SvREFCNT_dec(*svp);
9615e741 6675 *svp = sv;
345599ca
GS		 6676 }
6677 break;
6678 }
c750a3ec 6679
cd06dffe
GS		 6680 case OP_RV2AV:
6681 case OP_RV2HV:
6682 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6683 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6684 {
cd06dffe 6685 last_composite = o;
e1f15930 6686 }
cd06dffe
GS		 6687 o->op_seq = PL_op_seqmax++;
6688 break;
6689
6690 case OP_RETURN:
970c4905 6691 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6692 o->op_seq = PL_op_seqmax++;
6693 break;
6694 }
6695 /* FALL THROUGH */
6696
6697 case OP_LEAVESUBLV:
6698 if (last_composite) {
6699 OP *r = last_composite;
6700
6701 while (r->op_sibling)
6702 r = r->op_sibling;
6703 if (r->op_next == o
6704 || (r->op_next->op_type == OP_LIST
6705 && r->op_next->op_next == o))
6706 {
6707 if (last_composite->op_type == OP_RV2AV)
6708 yyerror("Lvalue subs returning arrays not implemented yet");
6709 else
6710 yyerror("Lvalue subs returning hashes not implemented yet");
6711 ;
6712 }
6713 }
6714 /* FALL THROUGH */
6715
79072805 6716 default:
3280af22 6717 o->op_seq = PL_op_seqmax++;
79072805
LW		 6718 break;
6719 }
a0d0e21e 6720 oldop = o;
79072805 6721 }
a0d0e21e 6722 LEAVE;
79072805 6723}
Unnamed repository; edit this file 'description' to name the repository.