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[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
4eb8286e 3 * Copyright (c) 1991-1999, 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
GS		 24
25/* XXXXXX testing */
26#define OP_REFCNT_LOCK NOOP
27#define OP_REFCNT_UNLOCK NOOP
28#define OpREFCNT_set(o,n) NOOP
29#define OpREFCNT_dec(o) 0
30
b7dc083c
NIS		 31#ifdef PL_OP_SLAB_ALLOC
32#define SLAB_SIZE 8192
33static char *PL_OpPtr = NULL;
34static int PL_OpSpace = 0;
35#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
36 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
37 else \
38 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
39 } while (0)
40
864dbfa3 41STATIC void *
cea2e8a9 42S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 43{
44 Newz(m,PL_OpPtr,SLAB_SIZE,char);
45 PL_OpSpace = SLAB_SIZE - sz;
46 return PL_OpPtr += PL_OpSpace;
47}
76e3520e 48
b7dc083c
NIS		 49#else
50#define NewOp(m, var, c, type) Newz(m, var, c, type)
51#endif
e50aee73 52/*
5dc0d613 53 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 54 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 55 */
11343788 56#define CHECKOP(type,o) \
3280af22 57 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 58 ? ( op_free((OP*)o), \
cea2e8a9 59 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 60 Nullop ) \
fc0dc3b3 61 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 62
c53d7c7d
HS		 63#define PAD_MAX 999999999
64
76e3520e 65STATIC char*
cea2e8a9 66S_gv_ename(pTHX_ GV *gv)
4633a7c4 67{
2d8e6c8d 68 STRLEN n_a;
4633a7c4 69 SV* tmpsv = sv_newmortal();
46fc3d4c 70 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 71 return SvPV(tmpsv,n_a);
4633a7c4
LW		 72}
73
76e3520e 74STATIC OP *
cea2e8a9 75S_no_fh_allowed(pTHX_ OP *o)
79072805 76{
cea2e8a9 77 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 78 PL_op_desc[o->op_type]));
11343788 79 return o;
79072805
LW		 80}
81
76e3520e 82STATIC OP *
cea2e8a9 83S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 84{
cea2e8a9 85 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 86 return o;
79072805
LW		 87}
88
76e3520e 89STATIC OP *
cea2e8a9 90S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 91{
cea2e8a9 92 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 93 return o;
79072805
LW		 94}
95
76e3520e 96STATIC void
cea2e8a9 97S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 98{
cea2e8a9 99 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 100 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 101}
102
7a52d87a 103STATIC void
cea2e8a9 104S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 105{
5a844595
GS		 106 qerror(Perl_mess(aTHX_
107 "Bareword \"%s\" not allowed while \"strict subs\" in use",
108 SvPV_nolen(cSVOPo->op_sv)));
7a52d87a
GS		 109}
110
79072805
LW		 111/* "register" allocation */
112
113PADOFFSET
864dbfa3 114Perl_pad_allocmy(pTHX_ char *name)
93a17b20 115{
11343788 116 dTHR;
a0d0e21e
LW		 117 PADOFFSET off;
118 SV *sv;
119
834a4ddd 120 if (!(
77ca0c92 121 PL_in_my == KEY_our ||
834a4ddd
LW		 122 isALPHA(name[1]) ||
123 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
77ca0c92 124 name[1] == '_' && (int)strlen(name) > 2 ))
834a4ddd 125 {
c4d0567e 126 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 127 /* 1999-02-27 mjd@plover.com */
128 char *p;
129 p = strchr(name, '\0');
130 /* The next block assumes the buffer is at least 205 chars
131 long. At present, it's always at least 256 chars. */
132 if (p-name > 200) {
133 strcpy(name+200, "...");
134 p = name+199;
135 }
136 else {
137 p[1] = '\0';
138 }
139 /* Move everything else down one character */
140 for (; p-name > 2; p--)
141 *p = *(p-1);
46fc3d4c 142 name[2] = toCTRL(name[1]);
143 name[1] = '^';
144 }
cea2e8a9 145 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 146 }
599cee73 147 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 148 SV **svp = AvARRAY(PL_comppad_name);
149 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 150 if ((sv = svp[off])
3280af22 151 && sv != &PL_sv_undef
c53d7c7d 152 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 153 && strEQ(name, SvPVX(sv)))
154 {
cea2e8a9 155 Perl_warner(aTHX_ WARN_UNSAFE,
77ca0c92
LW		 156 "\"%s\" variable %s masks earlier declaration in same %s",
157 (PL_in_my == KEY_our ? "our" : "my"),
158 name,
159 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 160 break;
161 }
162 }
163 }
a0d0e21e
LW		 164 off = pad_alloc(OP_PADSV, SVs_PADMY);
165 sv = NEWSV(1102,0);
93a17b20
LW		 166 sv_upgrade(sv, SVt_PVNV);
167 sv_setpv(sv, name);
3280af22 168 if (PL_in_my_stash) {
c750a3ec 169 if (*name != '$')
cea2e8a9 170 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 171 name));
c750a3ec
MB		 172 SvOBJECT_on(sv);
173 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 174 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
175 PL_sv_objcount++;
c750a3ec 176 }
77ca0c92
LW		 177 if (PL_in_my == KEY_our)
178 SvFLAGS(sv) |= SVpad_OUR;
3280af22 179 av_store(PL_comppad_name, off, sv);
65202027 180 SvNVX(sv) = (NV)PAD_MAX;
8990e307 181 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 182 if (!PL_min_intro_pending)
183 PL_min_intro_pending = off;
184 PL_max_intro_pending = off;
93a17b20 185 if (*name == '@')
3280af22 186 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 187 else if (*name == '%')
3280af22
NIS		 188 av_store(PL_comppad, off, (SV*)newHV());
189 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 190 return off;
191}
192
2680586e
GS		 193#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
194
76e3520e 195STATIC PADOFFSET
cea2e8a9 196S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 197 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 198{
11343788 199 dTHR;
748a9306 200 CV *cv;
93a17b20
LW		 201 I32 off;
202 SV *sv;
93a17b20 203 register I32 i;
c09156bb 204 register PERL_CONTEXT *cx;
93a17b20 205
748a9306 206 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 207 AV *curlist = CvPADLIST(cv);
208 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 209 AV *curname;
4fdae800 210
3280af22 211 if (!svp || *svp == &PL_sv_undef)
4633a7c4 212 continue;
748a9306
LW		 213 curname = (AV*)*svp;
214 svp = AvARRAY(curname);
93965878 215 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 216 if ((sv = svp[off]) &&
3280af22 217 sv != &PL_sv_undef &&
748a9306 218 seq <= SvIVX(sv) &&
13826f2c 219 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 220 strEQ(SvPVX(sv), name))
221 {
5f05dabc 222 I32 depth;
223 AV *oldpad;
224 SV *oldsv;
225
226 depth = CvDEPTH(cv);
227 if (!depth) {
9607fc9c 228 if (newoff) {
229 if (SvFAKE(sv))
230 continue;
4fdae800 231 return 0; /* don't clone from inactive stack frame */
9607fc9c 232 }
5f05dabc 233 depth = 1;
234 }
235 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
236 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 237 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 238 SV *namesv = NEWSV(1103,0);
748a9306 239 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 240 sv_upgrade(namesv, SVt_PVNV);
241 sv_setpv(namesv, name);
3280af22 242 av_store(PL_comppad_name, newoff, namesv);
65202027 243 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
c53d7c7d 244 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 245 SvFAKE_on(namesv); /* A ref, not a real var */
77ca0c92
LW		 246 if (SvFLAGS(sv) & SVpad_OUR)/* An "our" variable */
247 SvFLAGS(namesv) |= SVpad_OUR;
87671ffc 248 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 249 SvOBJECT_on(namesv);
250 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 251 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 252 PL_sv_objcount++;
253 }
3280af22 254 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 255 /* "It's closures all the way down." */
3280af22 256 CvCLONE_on(PL_compcv);
54310121 257 if (cv == startcv) {
3280af22 258 if (CvANON(PL_compcv))
54310121 259 oldsv = Nullsv; /* no need to keep ref */
260 }
261 else {
28757baa 262 CV *bcv;
263 for (bcv = startcv;
264 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 265 bcv = CvOUTSIDE(bcv))
266 {
28757baa 267 if (CvANON(bcv))
268 CvCLONE_on(bcv);
269 else {
6b35e009
GS		 270 if (ckWARN(WARN_CLOSURE)
271 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
272 {
cea2e8a9 273 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 274 "Variable \"%s\" may be unavailable",
28757baa 275 name);
6b35e009 276 }
28757baa 277 break;
278 }
279 }
280 }
281 }
3280af22 282 else if (!CvUNIQUE(PL_compcv)) {
599cee73 283 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 284 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 285 "Variable \"%s\" will not stay shared", name);
5f05dabc 286 }
748a9306 287 }
3280af22 288 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 289 return newoff;
290 }
93a17b20
LW		 291 }
292 }
293
2680586e
GS		 294 if (flags & FINDLEX_NOSEARCH)
295 return 0;
296
93a17b20
LW		 297 /* Nothing in current lexical context--try eval's context, if any.
298 * This is necessary to let the perldb get at lexically scoped variables.
299 * XXX This will also probably interact badly with eval tree caching.
300 */
301
748a9306 302 for (i = cx_ix; i >= 0; i--) {
93a17b20 303 cx = &cxstack[i];
6b35e009 304 switch (CxTYPE(cx)) {
93a17b20 305 default:
748a9306
LW		 306 if (i == 0 && saweval) {
307 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 308 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 309 }
93a17b20
LW		 310 break;
311 case CXt_EVAL:
44a8e56a 312 switch (cx->blk_eval.old_op_type) {
313 case OP_ENTEREVAL:
6b35e009
GS		 314 if (CxREALEVAL(cx))
315 saweval = i;
44a8e56a 316 break;
317 case OP_REQUIRE:
318 /* require must have its own scope */
319 return 0;
320 }
93a17b20
LW		 321 break;
322 case CXt_SUB:
323 if (!saweval)
324 return 0;
325 cv = cx->blk_sub.cv;
3280af22 326 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 327 saweval = i; /* so we know where we were called from */
93a17b20 328 continue;
93a17b20 329 }
748a9306 330 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 331 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 332 }
333 }
334
748a9306
LW		 335 return 0;
336}
a0d0e21e 337
748a9306 338PADOFFSET
864dbfa3 339Perl_pad_findmy(pTHX_ char *name)
748a9306 340{
11343788 341 dTHR;
748a9306 342 I32 off;
54310121 343 I32 pendoff = 0;
748a9306 344 SV *sv;
3280af22
NIS		 345 SV **svp = AvARRAY(PL_comppad_name);
346 U32 seq = PL_cop_seqmax;
6b35e009 347 PERL_CONTEXT *cx;
33b8ce05 348 CV *outside;
748a9306 349
11343788
MB		 350#ifdef USE_THREADS
351 /*
352 * Special case to get lexical (and hence per-thread) @_.
353 * XXX I need to find out how to tell at parse-time whether use
354 * of @_ should refer to a lexical (from a sub) or defgv (global
355 * scope and maybe weird sub-ish things like formats). See
356 * startsub in perly.y. It's possible that @_ could be lexical
357 * (at least from subs) even in non-threaded perl.
358 */
359 if (strEQ(name, "@_"))
360 return 0; /* success. (NOT_IN_PAD indicates failure) */
361#endif /* USE_THREADS */
362
748a9306 363 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 364 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 365 if ((sv = svp[off]) &&
3280af22 366 sv != &PL_sv_undef &&
54310121 367 (!SvIVX(sv) ||
368 (seq <= SvIVX(sv) &&
369 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 370 strEQ(SvPVX(sv), name))
371 {
77ca0c92 372 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 373 return (PADOFFSET)off;
374 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 375 }
376 }
748a9306 377
33b8ce05
GS		 378 outside = CvOUTSIDE(PL_compcv);
379
380 /* Check if if we're compiling an eval'', and adjust seq to be the
381 * eval's seq number. This depends on eval'' having a non-null
382 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 383 * identified by CvEVAL being true and CvGV being null. */
384 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 385 cx = &cxstack[cxstack_ix];
386 if (CxREALEVAL(cx))
387 seq = cx->blk_oldcop->cop_seq;
388 }
389
748a9306 390 /* See if it's in a nested scope */
2680586e 391 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 392 if (off) {
393 /* If there is a pending local definition, this new alias must die */
394 if (pendoff)
3280af22 395 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 396 return off; /* pad_findlex returns 0 for failure...*/
54310121 397 }
11343788 398 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 399}
400
401void
864dbfa3 402Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 403{
0453d815 404 dTHR;
93a17b20 405 I32 off;
3280af22 406 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 407 SV *sv;
3280af22
NIS		 408 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
409 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 410 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
411 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 412 }
413 }
414 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 415 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 416 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 417 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 418 }
419}
420
421PADOFFSET
864dbfa3 422Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 423{
11343788 424 dTHR;
79072805
LW		 425 SV *sv;
426 I32 retval;
427
3280af22 428 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 429 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 430 if (PL_pad_reset_pending)
a0d0e21e 431 pad_reset();
ed6116ce 432 if (tmptype & SVs_PADMY) {
79072805 433 do {
3280af22 434 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 435 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 436 retval = AvFILLp(PL_comppad);
79072805
LW		 437 }
438 else {
3280af22
NIS		 439 SV **names = AvARRAY(PL_comppad_name);
440 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 441 for (;;) {
442 /*
443 * "foreach" index vars temporarily become aliases to non-"my"
444 * values. Thus we must skip, not just pad values that are
445 * marked as current pad values, but also those with names.
446 */
3280af22
NIS		 447 if (++PL_padix <= names_fill &&
448 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 449 continue;
3280af22 450 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 451 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
452 break;
453 }
3280af22 454 retval = PL_padix;
79072805 455 }
8990e307 456 SvFLAGS(sv) |= tmptype;
3280af22 457 PL_curpad = AvARRAY(PL_comppad);
11343788 458#ifdef USE_THREADS
b900a521
JH		 459 DEBUG_X(PerlIO_printf(Perl_debug_log,
460 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
461 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 462 (long) retval, PL_op_name[optype]));
11343788 463#else
b900a521
JH		 464 DEBUG_X(PerlIO_printf(Perl_debug_log,
465 "Pad 0x%"UVxf" alloc %ld for %s\n",
466 PTR2UV(PL_curpad),
22c35a8c 467 (long) retval, PL_op_name[optype]));
11343788 468#endif /* USE_THREADS */
79072805
LW		 469 return (PADOFFSET)retval;
470}
471
472SV *
864dbfa3 473Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 474{
11343788
MB		 475 dTHR;
476#ifdef USE_THREADS
b900a521
JH		 477 DEBUG_X(PerlIO_printf(Perl_debug_log,
478 "0x%"UVxf" Pad 0x%"UVxf" sv %d\n",
479 PTR2UV(thr), PTR2UV(PL_curpad), po));
11343788 480#else
79072805 481 if (!po)
cea2e8a9 482 Perl_croak(aTHX_ "panic: pad_sv po");
b900a521
JH		 483 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %d\n",
484 PTR2UV(PL_curpad), po));
11343788 485#endif /* USE_THREADS */
3280af22 486 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 487}
488
489void
864dbfa3 490Perl_pad_free(pTHX_ PADOFFSET po)
79072805 491{
11343788 492 dTHR;
3280af22 493 if (!PL_curpad)
a0d0e21e 494 return;
3280af22 495 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 496 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 497 if (!po)
cea2e8a9 498 Perl_croak(aTHX_ "panic: pad_free po");
11343788 499#ifdef USE_THREADS
b900a521
JH		 500 DEBUG_X(PerlIO_printf(Perl_debug_log,
501 "0x%"UVxf" Pad 0x%"UVxf" free %d\n",
502 PTR2UV(thr), PTR2UV(PL_curpad), po));
11343788 503#else
b900a521
JH		 504 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %d\n",
505 PTR2UV(PL_curpad), po));
11343788 506#endif /* USE_THREADS */
3280af22
NIS		 507 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
508 SvPADTMP_off(PL_curpad[po]);
509 if ((I32)po < PL_padix)
510 PL_padix = po - 1;
79072805
LW		 511}
512
513void
864dbfa3 514Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 515{
11343788 516 dTHR;
3280af22 517 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 518 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 519 if (!po)
cea2e8a9 520 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 521#ifdef USE_THREADS
b900a521
JH		 522 DEBUG_X(PerlIO_printf(Perl_debug_log,
523 "0x%"UVxf" Pad 0x%"UVxf" swipe %d\n",
524 PTR2UV(thr), PTR2UV(PL_curpad), po));
11343788 525#else
b900a521
JH		 526 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %d\n",
527 PTR2UV(PL_curpad), po));
11343788 528#endif /* USE_THREADS */
3280af22
NIS		 529 SvPADTMP_off(PL_curpad[po]);
530 PL_curpad[po] = NEWSV(1107,0);
531 SvPADTMP_on(PL_curpad[po]);
532 if ((I32)po < PL_padix)
533 PL_padix = po - 1;
79072805
LW		 534}
535
d9bb4600
GS		 536/* XXX pad_reset() is currently disabled because it results in serious bugs.
537 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
538 * on the stack by OPs that use them, there are several ways to get an alias
539 * to a shared TARG. Such an alias will change randomly and unpredictably.
540 * We avoid doing this until we can think of a Better Way.
541 * GSAR 97-10-29 */
79072805 542void
864dbfa3 543Perl_pad_reset(pTHX)
79072805 544{
d9bb4600 545#ifdef USE_BROKEN_PAD_RESET
11343788 546 dTHR;
79072805
LW		 547 register I32 po;
548
6b88bc9c 549 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 550 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 551#ifdef USE_THREADS
b900a521
JH		 552 DEBUG_X(PerlIO_printf(Perl_debug_log,
553 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
554 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 555#else
b900a521
JH		 556 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
557 PTR2UV(PL_curpad)));
11343788 558#endif /* USE_THREADS */
6b88bc9c
GS		 559 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
560 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
561 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
562 SvPADTMP_off(PL_curpad[po]);
748a9306 563 }
6b88bc9c 564 PL_padix = PL_padix_floor;
79072805 565 }
d9bb4600 566#endif
3280af22 567 PL_pad_reset_pending = FALSE;
79072805
LW		 568}
569
a863c7d1 570#ifdef USE_THREADS
54b9620d 571/* find_threadsv is not reentrant */
a863c7d1 572PADOFFSET
864dbfa3 573Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 574{
575 dTHR;
576 char *p;
577 PADOFFSET key;
554b3eca 578 SV **svp;
54b9620d 579 /* We currently only handle names of a single character */
533c011a 580 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 581 if (!p)
582 return NOT_IN_PAD;
533c011a 583 key = p - PL_threadsv_names;
2d8e6c8d 584 MUTEX_LOCK(&thr->mutex);
54b9620d 585 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 586 if (svp)
587 MUTEX_UNLOCK(&thr->mutex);
588 else {
554b3eca 589 SV *sv = NEWSV(0, 0);
54b9620d 590 av_store(thr->threadsv, key, sv);
940cb80d 591 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 592 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 593 /*
594 * Some magic variables used to be automagically initialised
595 * in gv_fetchpv. Those which are now per-thread magicals get
596 * initialised here instead.
597 */
598 switch (*name) {
54b9620d
MB		 599 case '_':
600 break;
554b3eca
MB		 601 case ';':
602 sv_setpv(sv, "\034");
54b9620d 603 sv_magic(sv, 0, 0, name, 1);
554b3eca 604 break;
c277df42
IZ		 605 case '&':
606 case '`':
607 case '\'':
533c011a 608 PL_sawampersand = TRUE;
a3f914c5
GS		 609 /* FALL THROUGH */
610 case '1':
611 case '2':
612 case '3':
613 case '4':
614 case '5':
615 case '6':
616 case '7':
617 case '8':
618 case '9':
c277df42 619 SvREADONLY_on(sv);
d8b5173a 620 /* FALL THROUGH */
067391ea
GS		 621
622 /* XXX %! tied to Errno.pm needs to be added here.
623 * See gv_fetchpv(). */
624 /* case '!': */
625
54b9620d
MB		 626 default:
627 sv_magic(sv, 0, 0, name, 1);
554b3eca 628 }
bf49b057 629 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 630 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 631 sv, (*name < 32) ? "^" : "",
632 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 633 }
634 return key;
635}
636#endif /* USE_THREADS */
637
79072805
LW		 638/* Destructor */
639
640void
864dbfa3 641Perl_op_free(pTHX_ OP *o)
79072805 642{
85e6fe83 643 register OP *kid, *nextkid;
acb36ea4 644 OPCODE type;
79072805 645
5dc0d613 646 if (!o || o->op_seq == (U16)-1)
79072805
LW		 647 return;
648
7934575e
GS		 649 if (o->op_private & OPpREFCOUNTED) {
650 switch (o->op_type) {
651 case OP_LEAVESUB:
652 case OP_LEAVESUBLV:
653 case OP_LEAVEEVAL:
654 case OP_LEAVE:
655 case OP_SCOPE:
656 case OP_LEAVEWRITE:
657 OP_REFCNT_LOCK;
658 if (OpREFCNT_dec(o)) {
659 OP_REFCNT_UNLOCK;
660 return;
661 }
662 OP_REFCNT_UNLOCK;
663 break;
664 default:
665 break;
666 }
667 }
668
11343788
MB		 669 if (o->op_flags & OPf_KIDS) {
670 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 671 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 672 op_free(kid);
85e6fe83 673 }
79072805 674 }
acb36ea4
GS		 675 type = o->op_type;
676 if (type == OP_NULL)
677 type = o->op_targ;
678
679 /* COP* is not cleared by op_clear() so that we may track line
680 * numbers etc even after null() */
681 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
682 cop_free((COP*)o);
683
684 op_clear(o);
685
686#ifdef PL_OP_SLAB_ALLOC
687 if ((char *) o == PL_OpPtr)
688 {
689 }
690#else
691 Safefree(o);
692#endif
693}
79072805 694
acb36ea4
GS		 695STATIC void
696S_op_clear(pTHX_ OP *o)
697{
11343788 698 switch (o->op_type) {
acb36ea4
GS		 699 case OP_NULL: /* Was holding old type, if any. */
700 case OP_ENTEREVAL: /* Was holding hints. */
701#ifdef USE_THREADS
702 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
703#endif
704 o->op_targ = 0;
a0d0e21e 705 break;
554b3eca 706#ifdef USE_THREADS
8dd3ba40
SM		 707 case OP_ENTERITER:
708 if (!(o->op_flags & OPf_SPECIAL))
709 break;
710 /* FALL THROUGH */
554b3eca 711#endif /* USE_THREADS */
a6006777 712 default:
ac4c12e7 713 if (!(o->op_flags & OPf_REF)
0b94c7bb 714 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 715 break;
716 /* FALL THROUGH */
463ee0b2 717 case OP_GVSV:
79072805 718 case OP_GV:
a6006777 719 case OP_AELEMFAST:
7934575e
GS		 720 SvREFCNT_dec(cSVOPo->op_sv);
721 cSVOPo->op_sv = Nullsv;
79072805
LW		 722 break;
723 case OP_CONST:
11343788 724 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 725 cSVOPo->op_sv = Nullsv;
79072805 726 break;
748a9306
LW		 727 case OP_GOTO:
728 case OP_NEXT:
729 case OP_LAST:
730 case OP_REDO:
11343788 731 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 732 break;
733 /* FALL THROUGH */
a0d0e21e 734 case OP_TRANS:
acb36ea4 735 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 736 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 737 cSVOPo->op_sv = Nullsv;
738 }
739 else {
a0ed51b3 740 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 741 cPVOPo->op_pv = Nullch;
742 }
a0d0e21e
LW		 743 break;
744 case OP_SUBST:
11343788 745 op_free(cPMOPo->op_pmreplroot);
acb36ea4 746 cPMOPo->op_pmreplroot = Nullop;
a0d0e21e 747 /* FALL THROUGH */
748a9306 748 case OP_PUSHRE:
a0d0e21e 749 case OP_MATCH:
8782bef2 750 case OP_QR:
c277df42 751 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 752 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 753 break;
79072805
LW		 754 }
755
11343788
MB		 756 if (o->op_targ > 0)
757 pad_free(o->op_targ);
79072805
LW		 758}
759
76e3520e 760STATIC void
3eb57f73
HS		 761S_cop_free(pTHX_ COP* cop)
762{
763 Safefree(cop->cop_label);
cc49e20b 764 SvREFCNT_dec(CopFILEGV(cop));
0453d815 765 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 766 SvREFCNT_dec(cop->cop_warnings);
767}
768
769STATIC void
cea2e8a9 770S_null(pTHX_ OP *o)
8990e307 771{
acb36ea4
GS		 772 if (o->op_type == OP_NULL)
773 return;
774 op_clear(o);
11343788
MB		 775 o->op_targ = o->op_type;
776 o->op_type = OP_NULL;
22c35a8c 777 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 778}
779
79072805
LW		 780/* Contextualizers */
781
463ee0b2 782#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 783
784OP *
864dbfa3 785Perl_linklist(pTHX_ OP *o)
79072805
LW		 786{
787 register OP *kid;
788
11343788
MB		 789 if (o->op_next)
790 return o->op_next;
79072805
LW		 791
792 /* establish postfix order */
11343788
MB		 793 if (cUNOPo->op_first) {
794 o->op_next = LINKLIST(cUNOPo->op_first);
795 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 796 if (kid->op_sibling)
797 kid->op_next = LINKLIST(kid->op_sibling);
798 else
11343788 799 kid->op_next = o;
79072805
LW		 800 }
801 }
802 else
11343788 803 o->op_next = o;
79072805 804
11343788 805 return o->op_next;
79072805
LW		 806}
807
808OP *
864dbfa3 809Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 810{
811 OP *kid;
11343788
MB		 812 if (o && o->op_flags & OPf_KIDS) {
813 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 814 scalar(kid);
815 }
11343788 816 return o;
79072805
LW		 817}
818
76e3520e 819STATIC OP *
cea2e8a9 820S_scalarboolean(pTHX_ OP *o)
8990e307 821{
d008e5eb 822 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 823 dTHR;
d008e5eb
GS		 824 if (ckWARN(WARN_SYNTAX)) {
825 line_t oldline = PL_curcop->cop_line;
a0d0e21e 826
d008e5eb
GS		 827 if (PL_copline != NOLINE)
828 PL_curcop->cop_line = PL_copline;
cea2e8a9 829 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
d008e5eb
GS		 830 PL_curcop->cop_line = oldline;
831 }
a0d0e21e 832 }
11343788 833 return scalar(o);
8990e307
LW		 834}
835
836OP *
864dbfa3 837Perl_scalar(pTHX_ OP *o)
79072805
LW		 838{
839 OP *kid;
840
a0d0e21e 841 /* assumes no premature commitment */
3280af22 842 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 843 || o->op_type == OP_RETURN)
11343788 844 return o;
79072805 845
b162f9ea
IZ		 846 if ((o->op_private & OPpTARGET_MY)
847 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
848 return scalar(o); /* As if inside SASSIGN */
849
5dc0d613 850 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 851
11343788 852 switch (o->op_type) {
79072805 853 case OP_REPEAT:
11343788
MB		 854 if (o->op_private & OPpREPEAT_DOLIST)
855 null(((LISTOP*)cBINOPo->op_first)->op_first);
856 scalar(cBINOPo->op_first);
8990e307 857 break;
79072805
LW		 858 case OP_OR:
859 case OP_AND:
860 case OP_COND_EXPR:
11343788 861 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 862 scalar(kid);
79072805 863 break;
a0d0e21e 864 case OP_SPLIT:
11343788 865 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 866 if (!kPMOP->op_pmreplroot)
867 deprecate("implicit split to @_");
868 }
869 /* FALL THROUGH */
79072805 870 case OP_MATCH:
8782bef2 871 case OP_QR:
79072805
LW		 872 case OP_SUBST:
873 case OP_NULL:
8990e307 874 default:
11343788
MB		 875 if (o->op_flags & OPf_KIDS) {
876 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 877 scalar(kid);
878 }
79072805
LW		 879 break;
880 case OP_LEAVE:
881 case OP_LEAVETRY:
5dc0d613 882 kid = cLISTOPo->op_first;
54310121 883 scalar(kid);
884 while (kid = kid->op_sibling) {
885 if (kid->op_sibling)
886 scalarvoid(kid);
887 else
888 scalar(kid);
889 }
3280af22 890 WITH_THR(PL_curcop = &PL_compiling);
54310121 891 break;
748a9306 892 case OP_SCOPE:
79072805 893 case OP_LINESEQ:
8990e307 894 case OP_LIST:
11343788 895 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 896 if (kid->op_sibling)
897 scalarvoid(kid);
898 else
899 scalar(kid);
900 }
3280af22 901 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 902 break;
903 }
11343788 904 return o;
79072805
LW		 905}
906
907OP *
864dbfa3 908Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 909{
910 OP *kid;
8990e307
LW		 911 char* useless = 0;
912 SV* sv;
2ebea0a1
GS		 913 U8 want;
914
acb36ea4
GS		 915 if (o->op_type == OP_NEXTSTATE
916 || o->op_type == OP_SETSTATE
917 || o->op_type == OP_DBSTATE
918 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
919 || o->op_targ == OP_SETSTATE
920 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 921 {
922 dTHR;
923 PL_curcop = (COP*)o; /* for warning below */
924 }
79072805 925
54310121 926 /* assumes no premature commitment */
2ebea0a1
GS		 927 want = o->op_flags & OPf_WANT;
928 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 929 || o->op_type == OP_RETURN)
11343788 930 return o;
79072805 931
b162f9ea
IZ		 932 if ((o->op_private & OPpTARGET_MY)
933 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
934 return scalar(o); /* As if inside SASSIGN */
935
5dc0d613 936 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 937
11343788 938 switch (o->op_type) {
79072805 939 default:
22c35a8c 940 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 941 break;
36477c24 942 /* FALL THROUGH */
943 case OP_REPEAT:
11343788 944 if (o->op_flags & OPf_STACKED)
8990e307 945 break;
5d82c453
GA		 946 goto func_ops;
947 case OP_SUBSTR:
948 if (o->op_private == 4)
949 break;
8990e307
LW		 950 /* FALL THROUGH */
951 case OP_GVSV:
952 case OP_WANTARRAY:
953 case OP_GV:
954 case OP_PADSV:
955 case OP_PADAV:
956 case OP_PADHV:
957 case OP_PADANY:
958 case OP_AV2ARYLEN:
8990e307 959 case OP_REF:
a0d0e21e
LW		 960 case OP_REFGEN:
961 case OP_SREFGEN:
8990e307
LW		 962 case OP_DEFINED:
963 case OP_HEX:
964 case OP_OCT:
965 case OP_LENGTH:
8990e307
LW		 966 case OP_VEC:
967 case OP_INDEX:
968 case OP_RINDEX:
969 case OP_SPRINTF:
970 case OP_AELEM:
971 case OP_AELEMFAST:
972 case OP_ASLICE:
8990e307
LW		 973 case OP_HELEM:
974 case OP_HSLICE:
975 case OP_UNPACK:
976 case OP_PACK:
8990e307
LW		 977 case OP_JOIN:
978 case OP_LSLICE:
979 case OP_ANONLIST:
980 case OP_ANONHASH:
981 case OP_SORT:
982 case OP_REVERSE:
983 case OP_RANGE:
984 case OP_FLIP:
985 case OP_FLOP:
986 case OP_CALLER:
987 case OP_FILENO:
988 case OP_EOF:
989 case OP_TELL:
990 case OP_GETSOCKNAME:
991 case OP_GETPEERNAME:
992 case OP_READLINK:
993 case OP_TELLDIR:
994 case OP_GETPPID:
995 case OP_GETPGRP:
996 case OP_GETPRIORITY:
997 case OP_TIME:
998 case OP_TMS:
999 case OP_LOCALTIME:
1000 case OP_GMTIME:
1001 case OP_GHBYNAME:
1002 case OP_GHBYADDR:
1003 case OP_GHOSTENT:
1004 case OP_GNBYNAME:
1005 case OP_GNBYADDR:
1006 case OP_GNETENT:
1007 case OP_GPBYNAME:
1008 case OP_GPBYNUMBER:
1009 case OP_GPROTOENT:
1010 case OP_GSBYNAME:
1011 case OP_GSBYPORT:
1012 case OP_GSERVENT:
1013 case OP_GPWNAM:
1014 case OP_GPWUID:
1015 case OP_GGRNAM:
1016 case OP_GGRGID:
1017 case OP_GETLOGIN:
5d82c453 1018 func_ops:
11343788 1019 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 1020 useless = PL_op_desc[o->op_type];
8990e307
LW		 1021 break;
1022
1023 case OP_RV2GV:
1024 case OP_RV2SV:
1025 case OP_RV2AV:
1026 case OP_RV2HV:
11343788
MB		 1027 if (!(o->op_private & OPpLVAL_INTRO) &&
1028 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1029 useless = "a variable";
1030 break;
79072805
LW		 1031
1032 case OP_CONST:
11343788 1033 sv = cSVOPo->op_sv;
7a52d87a
GS		 1034 if (cSVOPo->op_private & OPpCONST_STRICT)
1035 no_bareword_allowed(o);
1036 else {
d008e5eb
GS		 1037 dTHR;
1038 if (ckWARN(WARN_VOID)) {
1039 useless = "a constant";
1040 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1041 useless = 0;
1042 else if (SvPOK(sv)) {
1043 if (strnEQ(SvPVX(sv), "di", 2) ||
1044 strnEQ(SvPVX(sv), "ds", 2) ||
1045 strnEQ(SvPVX(sv), "ig", 2))
1046 useless = 0;
1047 }
8990e307
LW		 1048 }
1049 }
acb36ea4 1050 null(o); /* don't execute or even remember it */
79072805
LW		 1051 break;
1052
1053 case OP_POSTINC:
11343788 1054 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1055 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1056 break;
1057
1058 case OP_POSTDEC:
11343788 1059 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1060 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1061 break;
1062
79072805
LW		 1063 case OP_OR:
1064 case OP_AND:
1065 case OP_COND_EXPR:
11343788 1066 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1067 scalarvoid(kid);
1068 break;
5aabfad6 1069
a0d0e21e 1070 case OP_NULL:
11343788 1071 if (o->op_flags & OPf_STACKED)
a0d0e21e 1072 break;
5aabfad6 1073 /* FALL THROUGH */
2ebea0a1
GS		 1074 case OP_NEXTSTATE:
1075 case OP_DBSTATE:
79072805
LW		 1076 case OP_ENTERTRY:
1077 case OP_ENTER:
1078 case OP_SCALAR:
11343788 1079 if (!(o->op_flags & OPf_KIDS))
79072805 1080 break;
54310121 1081 /* FALL THROUGH */
463ee0b2 1082 case OP_SCOPE:
79072805
LW		 1083 case OP_LEAVE:
1084 case OP_LEAVETRY:
a0d0e21e 1085 case OP_LEAVELOOP:
79072805 1086 case OP_LINESEQ:
79072805 1087 case OP_LIST:
11343788 1088 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1089 scalarvoid(kid);
1090 break;
c90c0ff4 1091 case OP_ENTEREVAL:
5196be3e 1092 scalarkids(o);
c90c0ff4 1093 break;
5aabfad6 1094 case OP_REQUIRE:
c90c0ff4 1095 /* all requires must return a boolean value */
5196be3e
MB		 1096 o->op_flags &= ~OPf_WANT;
1097 return scalar(o);
a0d0e21e 1098 case OP_SPLIT:
11343788 1099 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1100 if (!kPMOP->op_pmreplroot)
1101 deprecate("implicit split to @_");
1102 }
1103 break;
79072805 1104 }
d008e5eb
GS		 1105 if (useless) {
1106 dTHR;
1107 if (ckWARN(WARN_VOID))
cea2e8a9 1108 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1109 }
11343788 1110 return o;
79072805
LW		 1111}
1112
1113OP *
864dbfa3 1114Perl_listkids(pTHX_ OP *o)
79072805
LW		 1115{
1116 OP *kid;
11343788
MB		 1117 if (o && o->op_flags & OPf_KIDS) {
1118 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1119 list(kid);
1120 }
11343788 1121 return o;
79072805
LW		 1122}
1123
1124OP *
864dbfa3 1125Perl_list(pTHX_ OP *o)
79072805
LW		 1126{
1127 OP *kid;
1128
a0d0e21e 1129 /* assumes no premature commitment */
3280af22 1130 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1131 || o->op_type == OP_RETURN)
11343788 1132 return o;
79072805 1133
b162f9ea
IZ		 1134 if ((o->op_private & OPpTARGET_MY)
1135 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1136 return o; /* As if inside SASSIGN */
1137
5dc0d613 1138 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1139
11343788 1140 switch (o->op_type) {
79072805
LW		 1141 case OP_FLOP:
1142 case OP_REPEAT:
11343788 1143 list(cBINOPo->op_first);
79072805
LW		 1144 break;
1145 case OP_OR:
1146 case OP_AND:
1147 case OP_COND_EXPR:
11343788 1148 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1149 list(kid);
1150 break;
1151 default:
1152 case OP_MATCH:
8782bef2 1153 case OP_QR:
79072805
LW		 1154 case OP_SUBST:
1155 case OP_NULL:
11343788 1156 if (!(o->op_flags & OPf_KIDS))
79072805 1157 break;
11343788
MB		 1158 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1159 list(cBINOPo->op_first);
1160 return gen_constant_list(o);
79072805
LW		 1161 }
1162 case OP_LIST:
11343788 1163 listkids(o);
79072805
LW		 1164 break;
1165 case OP_LEAVE:
1166 case OP_LEAVETRY:
5dc0d613 1167 kid = cLISTOPo->op_first;
54310121 1168 list(kid);
1169 while (kid = kid->op_sibling) {
1170 if (kid->op_sibling)
1171 scalarvoid(kid);
1172 else
1173 list(kid);
1174 }
3280af22 1175 WITH_THR(PL_curcop = &PL_compiling);
54310121 1176 break;
748a9306 1177 case OP_SCOPE:
79072805 1178 case OP_LINESEQ:
11343788 1179 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1180 if (kid->op_sibling)
1181 scalarvoid(kid);
1182 else
1183 list(kid);
1184 }
3280af22 1185 WITH_THR(PL_curcop = &PL_compiling);
79072805 1186 break;
c90c0ff4 1187 case OP_REQUIRE:
1188 /* all requires must return a boolean value */
5196be3e
MB		 1189 o->op_flags &= ~OPf_WANT;
1190 return scalar(o);
79072805 1191 }
11343788 1192 return o;
79072805
LW		 1193}
1194
1195OP *
864dbfa3 1196Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1197{
1198 OP *kid;
1199
11343788
MB		 1200 if (o) {
1201 if (o->op_type == OP_LINESEQ ||
1202 o->op_type == OP_SCOPE ||
1203 o->op_type == OP_LEAVE ||
1204 o->op_type == OP_LEAVETRY)
463ee0b2 1205 {
0f15f207 1206 dTHR;
11343788 1207 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1208 if (kid->op_sibling) {
463ee0b2 1209 scalarvoid(kid);
ed6116ce 1210 }
463ee0b2 1211 }
3280af22 1212 PL_curcop = &PL_compiling;
79072805 1213 }
11343788 1214 o->op_flags &= ~OPf_PARENS;
3280af22 1215 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1216 o->op_flags |= OPf_PARENS;
79072805 1217 }
8990e307 1218 else
11343788
MB		 1219 o = newOP(OP_STUB, 0);
1220 return o;
79072805
LW		 1221}
1222
76e3520e 1223STATIC OP *
cea2e8a9 1224S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1225{
1226 OP *kid;
11343788
MB		 1227 if (o && o->op_flags & OPf_KIDS) {
1228 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1229 mod(kid, type);
79072805 1230 }
11343788 1231 return o;
79072805
LW		 1232}
1233
79072805 1234OP *
864dbfa3 1235Perl_mod(pTHX_ OP *o, I32 type)
79072805 1236{
11343788 1237 dTHR;
79072805
LW		 1238 OP *kid;
1239 SV *sv;
2d8e6c8d 1240 STRLEN n_a;
79072805 1241
3280af22 1242 if (!o || PL_error_count)
11343788 1243 return o;
79072805 1244
b162f9ea
IZ		 1245 if ((o->op_private & OPpTARGET_MY)
1246 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1247 return o;
1248
11343788 1249 switch (o->op_type) {
68dc0745 1250 case OP_UNDEF:
3280af22 1251 PL_modcount++;
5dc0d613 1252 return o;
a0d0e21e 1253 case OP_CONST:
11343788 1254 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1255 goto nomod;
3280af22
NIS		 1256 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1257 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1258 PL_eval_start = 0;
a0d0e21e
LW		 1259 }
1260 else if (!type) {
3280af22
NIS		 1261 SAVEI32(PL_compiling.cop_arybase);
1262 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1263 }
1264 else if (type == OP_REFGEN)
1265 goto nomod;
1266 else
cea2e8a9 1267 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1268 break;
5f05dabc 1269 case OP_STUB:
5196be3e 1270 if (o->op_flags & OPf_PARENS)
5f05dabc 1271 break;
1272 goto nomod;
a0d0e21e
LW		 1273 case OP_ENTERSUB:
1274 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1275 !(o->op_flags & OPf_STACKED)) {
1276 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1277 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1278 assert(cUNOPo->op_first->op_type == OP_NULL);
1279 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1280 break;
1281 }
cd06dffe
GS		 1282 else { /* lvalue subroutine call */
1283 o->op_private |= OPpLVAL_INTRO;
1284 if (type == OP_GREPSTART || type == OP_ENTERSUB) {
1285 /* Backward compatibility mode: */
1286 o->op_private |= OPpENTERSUB_INARGS;
1287 break;
1288 }
1289 else { /* Compile-time error message: */
1290 OP *kid = cUNOPo->op_first;
1291 CV *cv;
1292 OP *okid;
1293
1294 if (kid->op_type == OP_PUSHMARK)
1295 goto skip_kids;
1296 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1297 Perl_croak(aTHX_
1298 "panic: unexpected lvalue entersub "
1299 "args: type/targ %ld:%ld",
1300 (long)kid->op_type,kid->op_targ);
1301 kid = kLISTOP->op_first;
1302 skip_kids:
1303 while (kid->op_sibling)
1304 kid = kid->op_sibling;
1305 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1306 /* Indirect call */
1307 if (kid->op_type == OP_METHOD_NAMED
1308 || kid->op_type == OP_METHOD)
1309 {
349fd7b7 1310 OP *newop;
cd06dffe
GS		 1311
1312 if (kid->op_sibling || kid->op_next != kid) {
1313 yyerror("panic: unexpected optree near method call");
1314 break;
1315 }
1316
349fd7b7
GS		 1317 NewOp(1101, newop, 1, OP);
1318 newop->op_type = OP_RV2CV;
1319 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
1320 newop->op_next = newop;
1321 kid->op_sibling = newop;
1322 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1323 break;
1324 }
1325
1326 if (kid->op_type != OP_RV2CV)
1327 Perl_croak(aTHX_
1328 "panic: unexpected lvalue entersub "
1329 "entry via type/targ %ld:%ld",
1330 (long)kid->op_type,kid->op_targ);
1331 kid->op_private |= OPpLVAL_INTRO;
1332 break; /* Postpone until runtime */
1333 }
1334
1335 okid = kid;
1336 kid = kUNOP->op_first;
1337 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1338 kid = kUNOP->op_first;
1339 if (kid->op_type == OP_NULL)
1340 Perl_croak(aTHX_
1341 "Unexpected constant lvalue entersub "
1342 "entry via type/targ %ld:%ld",
1343 (long)kid->op_type,kid->op_targ);
1344 if (kid->op_type != OP_GV) {
1345 /* Restore RV2CV to check lvalueness */
1346 restore_2cv:
1347 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1348 okid->op_next = kid->op_next;
1349 kid->op_next = okid;
1350 }
1351 else
1352 okid->op_next = Nullop;
1353 okid->op_type = OP_RV2CV;
1354 okid->op_targ = 0;
1355 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1356 okid->op_private |= OPpLVAL_INTRO;
1357 break;
1358 }
1359
7934575e 1360 cv = GvCV((GV*)kSVOP->op_sv);
cd06dffe
GS		 1361 if (!cv)
1362 goto restore_2cv;
1363 if (CvLVALUE(cv))
1364 break;
1365 }
1366 }
79072805
LW		 1367 /* FALL THROUGH */
1368 default:
a0d0e21e
LW		 1369 nomod:
1370 /* grep, foreach, subcalls, refgen */
1371 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1372 break;
cea2e8a9 1373 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1374 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1375 ? "do block"
1376 : (o->op_type == OP_ENTERSUB
1377 ? "non-lvalue subroutine call"
1378 : PL_op_desc[o->op_type])),
22c35a8c 1379 type ? PL_op_desc[type] : "local"));
11343788 1380 return o;
79072805 1381
a0d0e21e
LW		 1382 case OP_PREINC:
1383 case OP_PREDEC:
1384 case OP_POW:
1385 case OP_MULTIPLY:
1386 case OP_DIVIDE:
1387 case OP_MODULO:
1388 case OP_REPEAT:
1389 case OP_ADD:
1390 case OP_SUBTRACT:
1391 case OP_CONCAT:
1392 case OP_LEFT_SHIFT:
1393 case OP_RIGHT_SHIFT:
1394 case OP_BIT_AND:
1395 case OP_BIT_XOR:
1396 case OP_BIT_OR:
1397 case OP_I_MULTIPLY:
1398 case OP_I_DIVIDE:
1399 case OP_I_MODULO:
1400 case OP_I_ADD:
1401 case OP_I_SUBTRACT:
11343788 1402 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1403 goto nomod;
3280af22 1404 PL_modcount++;
a0d0e21e
LW		 1405 break;
1406
79072805 1407 case OP_COND_EXPR:
11343788 1408 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1409 mod(kid, type);
79072805
LW		 1410 break;
1411
1412 case OP_RV2AV:
1413 case OP_RV2HV:
93af7a87 1414 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1415 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1416 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1417 PL_modcount = 10000;
11343788 1418 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1419 }
1420 /* FALL THROUGH */
79072805 1421 case OP_RV2GV:
5dc0d613 1422 if (scalar_mod_type(o, type))
3fe9a6f1 1423 goto nomod;
11343788 1424 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1425 /* FALL THROUGH */
1426 case OP_AASSIGN:
1427 case OP_ASLICE:
1428 case OP_HSLICE:
93a17b20
LW		 1429 case OP_NEXTSTATE:
1430 case OP_DBSTATE:
a0d0e21e
LW		 1431 case OP_REFGEN:
1432 case OP_CHOMP:
3280af22 1433 PL_modcount = 10000;
79072805 1434 break;
463ee0b2 1435 case OP_RV2SV:
11343788 1436 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1437 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1438 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1439 /* FALL THROUGH */
79072805 1440 case OP_GV:
463ee0b2 1441 case OP_AV2ARYLEN:
3280af22 1442 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1443 case OP_SASSIGN:
bf4b1e52
GS		 1444 case OP_ANDASSIGN:
1445 case OP_ORASSIGN:
8990e307 1446 case OP_AELEMFAST:
3280af22 1447 PL_modcount++;
8990e307
LW		 1448 break;
1449
748a9306
LW		 1450 case OP_PADAV:
1451 case OP_PADHV:
3280af22 1452 PL_modcount = 10000;
5196be3e
MB		 1453 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1454 return o; /* Treat \(@foo) like ordinary list. */
1455 if (scalar_mod_type(o, type))
3fe9a6f1 1456 goto nomod;
748a9306
LW		 1457 /* FALL THROUGH */
1458 case OP_PADSV:
3280af22 1459 PL_modcount++;
748a9306 1460 if (!type)
cea2e8a9 1461 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1462 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1463 break;
1464
554b3eca 1465#ifdef USE_THREADS
2faa37cc 1466 case OP_THREADSV:
533c011a 1467 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1468 break;
1469#endif /* USE_THREADS */
1470
748a9306
LW		 1471 case OP_PUSHMARK:
1472 break;
a0d0e21e 1473
69969c6f
SB		 1474 case OP_KEYS:
1475 if (type != OP_SASSIGN)
1476 goto nomod;
5d82c453
GA		 1477 goto lvalue_func;
1478 case OP_SUBSTR:
1479 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1480 goto nomod;
5f05dabc 1481 /* FALL THROUGH */
a0d0e21e 1482 case OP_POS:
463ee0b2 1483 case OP_VEC:
5d82c453 1484 lvalue_func:
11343788
MB		 1485 pad_free(o->op_targ);
1486 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1487 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1488 if (o->op_flags & OPf_KIDS)
1489 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1490 break;
a0d0e21e 1491
463ee0b2
LW		 1492 case OP_AELEM:
1493 case OP_HELEM:
11343788 1494 ref(cBINOPo->op_first, o->op_type);
68dc0745 1495 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1496 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1497 o->op_private |= OPpLVAL_DEFER;
3280af22 1498 PL_modcount++;
463ee0b2
LW		 1499 break;
1500
1501 case OP_SCOPE:
1502 case OP_LEAVE:
1503 case OP_ENTER:
11343788
MB		 1504 if (o->op_flags & OPf_KIDS)
1505 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1506 break;
1507
1508 case OP_NULL:
638bc118
GS		 1509 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1510 goto nomod;
1511 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1512 break;
11343788
MB		 1513 if (o->op_targ != OP_LIST) {
1514 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1515 break;
1516 }
1517 /* FALL THROUGH */
463ee0b2 1518 case OP_LIST:
11343788 1519 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1520 mod(kid, type);
1521 break;
1522 }
11343788 1523 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1524
1525 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1526 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1527 else if (!type) {
11343788
MB		 1528 o->op_private |= OPpLVAL_INTRO;
1529 o->op_flags &= ~OPf_SPECIAL;
3280af22 1530 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1531 }
a0d0e21e 1532 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1533 o->op_flags |= OPf_REF;
1534 return o;
463ee0b2
LW		 1535}
1536
864dbfa3 1537STATIC bool
cea2e8a9 1538S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1539{
1540 switch (type) {
1541 case OP_SASSIGN:
5196be3e 1542 if (o->op_type == OP_RV2GV)
3fe9a6f1 1543 return FALSE;
1544 /* FALL THROUGH */
1545 case OP_PREINC:
1546 case OP_PREDEC:
1547 case OP_POSTINC:
1548 case OP_POSTDEC:
1549 case OP_I_PREINC:
1550 case OP_I_PREDEC:
1551 case OP_I_POSTINC:
1552 case OP_I_POSTDEC:
1553 case OP_POW:
1554 case OP_MULTIPLY:
1555 case OP_DIVIDE:
1556 case OP_MODULO:
1557 case OP_REPEAT:
1558 case OP_ADD:
1559 case OP_SUBTRACT:
1560 case OP_I_MULTIPLY:
1561 case OP_I_DIVIDE:
1562 case OP_I_MODULO:
1563 case OP_I_ADD:
1564 case OP_I_SUBTRACT:
1565 case OP_LEFT_SHIFT:
1566 case OP_RIGHT_SHIFT:
1567 case OP_BIT_AND:
1568 case OP_BIT_XOR:
1569 case OP_BIT_OR:
1570 case OP_CONCAT:
1571 case OP_SUBST:
1572 case OP_TRANS:
49e9fbe6
GS		 1573 case OP_READ:
1574 case OP_SYSREAD:
1575 case OP_RECV:
bf4b1e52
GS		 1576 case OP_ANDASSIGN:
1577 case OP_ORASSIGN:
3fe9a6f1 1578 return TRUE;
1579 default:
1580 return FALSE;
1581 }
1582}
1583
35cd451c 1584STATIC bool
cea2e8a9 1585S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1586{
1587 switch (o->op_type) {
1588 case OP_PIPE_OP:
1589 case OP_SOCKPAIR:
1590 if (argnum == 2)
1591 return TRUE;
1592 /* FALL THROUGH */
1593 case OP_SYSOPEN:
1594 case OP_OPEN:
ded8aa31 1595 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1596 case OP_SOCKET:
1597 case OP_OPEN_DIR:
1598 case OP_ACCEPT:
1599 if (argnum == 1)
1600 return TRUE;
1601 /* FALL THROUGH */
1602 default:
1603 return FALSE;
1604 }
1605}
1606
463ee0b2 1607OP *
864dbfa3 1608Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1609{
1610 OP *kid;
11343788
MB		 1611 if (o && o->op_flags & OPf_KIDS) {
1612 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1613 ref(kid, type);
1614 }
11343788 1615 return o;
463ee0b2
LW		 1616}
1617
1618OP *
864dbfa3 1619Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1620{
1621 OP *kid;
463ee0b2 1622
3280af22 1623 if (!o || PL_error_count)
11343788 1624 return o;
463ee0b2 1625
11343788 1626 switch (o->op_type) {
a0d0e21e 1627 case OP_ENTERSUB:
e55aaa0e 1628 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1629 !(o->op_flags & OPf_STACKED)) {
1630 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1631 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1632 assert(cUNOPo->op_first->op_type == OP_NULL);
1633 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1634 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1635 }
1636 break;
aeea060c 1637
463ee0b2 1638 case OP_COND_EXPR:
11343788 1639 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1640 ref(kid, type);
1641 break;
8990e307 1642 case OP_RV2SV:
35cd451c
GS		 1643 if (type == OP_DEFINED)
1644 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1645 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1646 /* FALL THROUGH */
1647 case OP_PADSV:
5f05dabc 1648 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1649 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1650 : type == OP_RV2HV ? OPpDEREF_HV
1651 : OPpDEREF_SV);
11343788 1652 o->op_flags |= OPf_MOD;
a0d0e21e 1653 }
8990e307
LW		 1654 break;
1655
2faa37cc 1656 case OP_THREADSV:
a863c7d1
MB		 1657 o->op_flags |= OPf_MOD; /* XXX ??? */
1658 break;
1659
463ee0b2
LW		 1660 case OP_RV2AV:
1661 case OP_RV2HV:
aeea060c 1662 o->op_flags |= OPf_REF;
8990e307 1663 /* FALL THROUGH */
463ee0b2 1664 case OP_RV2GV:
35cd451c
GS		 1665 if (type == OP_DEFINED)
1666 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1667 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1668 break;
8990e307 1669
463ee0b2
LW		 1670 case OP_PADAV:
1671 case OP_PADHV:
aeea060c 1672 o->op_flags |= OPf_REF;
79072805 1673 break;
aeea060c 1674
8990e307 1675 case OP_SCALAR:
79072805 1676 case OP_NULL:
11343788 1677 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1678 break;
11343788 1679 ref(cBINOPo->op_first, type);
79072805
LW		 1680 break;
1681 case OP_AELEM:
1682 case OP_HELEM:
11343788 1683 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1684 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1685 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1686 : type == OP_RV2HV ? OPpDEREF_HV
1687 : OPpDEREF_SV);
11343788 1688 o->op_flags |= OPf_MOD;
8990e307 1689 }
79072805
LW		 1690 break;
1691
463ee0b2 1692 case OP_SCOPE:
79072805
LW		 1693 case OP_LEAVE:
1694 case OP_ENTER:
8990e307 1695 case OP_LIST:
11343788 1696 if (!(o->op_flags & OPf_KIDS))
79072805 1697 break;
11343788 1698 ref(cLISTOPo->op_last, type);
79072805 1699 break;
a0d0e21e
LW		 1700 default:
1701 break;
79072805 1702 }
11343788 1703 return scalar(o);
8990e307 1704
79072805
LW		 1705}
1706
09bef843
SB		 1707STATIC OP *
1708S_dup_attrlist(pTHX_ OP *o)
1709{
1710 OP *rop = Nullop;
1711
1712 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1713 * where the first kid is OP_PUSHMARK and the remaining ones
1714 * are OP_CONST. We need to push the OP_CONST values.
1715 */
1716 if (o->op_type == OP_CONST)
1717 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1718 else {
1719 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1720 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1721 if (o->op_type == OP_CONST)
1722 rop = append_elem(OP_LIST, rop,
1723 newSVOP(OP_CONST, o->op_flags,
1724 SvREFCNT_inc(cSVOPo->op_sv)));
1725 }
1726 }
1727 return rop;
1728}
1729
1730STATIC void
1731S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1732{
1733 OP *modname; /* for 'use' */
1734 SV *stashsv;
1735
1736 /* fake up C<use attributes $pkg,$rv,@attrs> */
1737 ENTER; /* need to protect against side-effects of 'use' */
1738 SAVEINT(PL_expect);
1739 if (stash && HvNAME(stash))
1740 stashsv = newSVpv(HvNAME(stash), 0);
1741 else
1742 stashsv = &PL_sv_no;
1743#define ATTRSMODULE "attributes"
1744 modname = newSVOP(OP_CONST, 0,
1745 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1));
1746 modname->op_private |= OPpCONST_BARE;
1747 /* that flag is required to make 'use' work right */
1748 utilize(1, start_subparse(FALSE, 0),
1749 Nullop, /* version */
1750 modname,
1751 prepend_elem(OP_LIST,
1752 newSVOP(OP_CONST, 0, stashsv),
1753 prepend_elem(OP_LIST,
1754 newSVOP(OP_CONST, 0, newRV(target)),
1755 dup_attrlist(attrs))));
1756 LEAVE;
1757}
1758
1759STATIC OP *
1760S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1761{
1762 OP *kid;
93a17b20
LW		 1763 I32 type;
1764
3280af22 1765 if (!o || PL_error_count)
11343788 1766 return o;
93a17b20 1767
11343788 1768 type = o->op_type;
93a17b20 1769 if (type == OP_LIST) {
11343788 1770 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1771 my_kid(kid, attrs);
dab48698 1772 } else if (type == OP_UNDEF) {
7766148a 1773 return o;
77ca0c92
LW		 1774 } else if (type == OP_RV2SV || /* "our" declaration */
1775 type == OP_RV2AV ||
1776 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
1777 return o;
dab48698 1778 } else if (type != OP_PADSV &&
93a17b20
LW		 1779 type != OP_PADAV &&
1780 type != OP_PADHV &&
1781 type != OP_PUSHMARK)
1782 {
cea2e8a9 1783 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1784 return o;
93a17b20 1785 }
09bef843
SB		 1786 else if (attrs && type != OP_PUSHMARK) {
1787 HV *stash;
1788 SV *padsv;
1789 SV **namesvp;
1790
1791 /* check for C<my Dog $spot> when deciding package */
1792 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1793 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1794 stash = SvSTASH(*namesvp);
1795 else
1796 stash = PL_curstash;
1797 padsv = PAD_SV(o->op_targ);
1798 apply_attrs(stash, padsv, attrs);
1799 }
11343788
MB		 1800 o->op_flags |= OPf_MOD;
1801 o->op_private |= OPpLVAL_INTRO;
1802 return o;
93a17b20
LW		 1803}
1804
1805OP *
09bef843
SB		 1806Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1807{
1808 if (o->op_flags & OPf_PARENS)
1809 list(o);
1810 PL_in_my = FALSE;
1811 PL_in_my_stash = Nullhv;
1812 if (attrs)
1813 SAVEFREEOP(attrs);
1814 return my_kid(o, attrs);
1815}
1816
1817OP *
1818Perl_my(pTHX_ OP *o)
1819{
1820 return my_kid(o, Nullop);
1821}
1822
1823OP *
864dbfa3 1824Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1825{
1826 if (o)
1827 o->op_flags |= OPf_PARENS;
1828 return o;
1829}
1830
1831OP *
864dbfa3 1832Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1833{
d008e5eb 1834 dTHR;
11343788 1835 OP *o;
79072805 1836
599cee73
PM		 1837 if (ckWARN(WARN_UNSAFE) &&
1838 (left->op_type == OP_RV2AV ||
1839 left->op_type == OP_RV2HV ||
1840 left->op_type == OP_PADAV ||
1841 left->op_type == OP_PADHV)) {
22c35a8c 1842 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1843 right->op_type == OP_TRANS)
1844 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1845 const char *sample = ((left->op_type == OP_RV2AV ||
1846 left->op_type == OP_PADAV)
1847 ? "@array" : "%hash");
cea2e8a9 1848 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1849 "Applying %s to %s will act on scalar(%s)",
1850 desc, sample, sample);
2ae324a7 1851 }
1852
79072805
LW		 1853 if (right->op_type == OP_MATCH ||
1854 right->op_type == OP_SUBST ||
1855 right->op_type == OP_TRANS) {
1856 right->op_flags |= OPf_STACKED;
1857 if (right->op_type != OP_MATCH)
463ee0b2 1858 left = mod(left, right->op_type);
79072805 1859 if (right->op_type == OP_TRANS)
11343788 1860 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1861 else
11343788 1862 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1863 if (type == OP_NOT)
11343788
MB		 1864 return newUNOP(OP_NOT, 0, scalar(o));
1865 return o;
79072805
LW		 1866 }
1867 else
1868 return bind_match(type, left,
1869 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1870}
1871
1872OP *
864dbfa3 1873Perl_invert(pTHX_ OP *o)
79072805 1874{
11343788
MB		 1875 if (!o)
1876 return o;
79072805 1877 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1878 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1879}
1880
1881OP *
864dbfa3 1882Perl_scope(pTHX_ OP *o)
79072805
LW		 1883{
1884 if (o) {
3280af22 1885 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1886 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1887 o->op_type = OP_LEAVE;
22c35a8c 1888 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1889 }
1890 else {
1891 if (o->op_type == OP_LINESEQ) {
1892 OP *kid;
1893 o->op_type = OP_SCOPE;
22c35a8c 1894 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1895 kid = ((LISTOP*)o)->op_first;
1896 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1897 null(kid);
463ee0b2
LW		 1898 }
1899 else
748a9306 1900 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1901 }
79072805
LW		 1902 }
1903 return o;
1904}
1905
b3ac6de7 1906void
864dbfa3 1907Perl_save_hints(pTHX)
b3ac6de7 1908{
3280af22
NIS		 1909 SAVEI32(PL_hints);
1910 SAVESPTR(GvHV(PL_hintgv));
1911 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1912 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1913}
1914
a0d0e21e 1915int
864dbfa3 1916Perl_block_start(pTHX_ int full)
79072805 1917{
11343788 1918 dTHR;
3280af22 1919 int retval = PL_savestack_ix;
b3ac6de7 1920
3280af22 1921 SAVEI32(PL_comppad_name_floor);
55497cff 1922 if (full) {
3280af22
NIS		 1923 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1924 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1925 else
3280af22
NIS		 1926 PL_comppad_name_floor = 0;
1927 }
1928 SAVEI32(PL_min_intro_pending);
1929 SAVEI32(PL_max_intro_pending);
1930 PL_min_intro_pending = 0;
1931 SAVEI32(PL_comppad_name_fill);
1932 SAVEI32(PL_padix_floor);
1933 PL_padix_floor = PL_padix;
1934 PL_pad_reset_pending = FALSE;
b3ac6de7 1935 SAVEHINTS();
3280af22 1936 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1937 SAVEPPTR(PL_compiling.cop_warnings);
0453d815 1938 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 1939 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1940 SAVEFREESV(PL_compiling.cop_warnings) ;
1941 }
1942
1943
a0d0e21e
LW		 1944 return retval;
1945}
1946
1947OP*
864dbfa3 1948Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 1949{
11343788 1950 dTHR;
3280af22 1951 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1952 OP* retval = scalarseq(seq);
a0d0e21e 1953 LEAVE_SCOPE(floor);
3280af22 1954 PL_pad_reset_pending = FALSE;
e24b16f9 1955 PL_compiling.op_private = PL_hints;
a0d0e21e 1956 if (needblockscope)
3280af22
NIS		 1957 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1958 pad_leavemy(PL_comppad_name_fill);
1959 PL_cop_seqmax++;
a0d0e21e
LW		 1960 return retval;
1961}
1962
76e3520e 1963STATIC OP *
cea2e8a9 1964S_newDEFSVOP(pTHX)
54b9620d
MB		 1965{
1966#ifdef USE_THREADS
1967 OP *o = newOP(OP_THREADSV, 0);
1968 o->op_targ = find_threadsv("_");
1969 return o;
1970#else
3280af22 1971 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1972#endif /* USE_THREADS */
1973}
1974
a0d0e21e 1975void
864dbfa3 1976Perl_newPROG(pTHX_ OP *o)
a0d0e21e 1977{
11343788 1978 dTHR;
3280af22 1979 if (PL_in_eval) {
b295d113
TH		 1980 if (PL_eval_root)
1981 return;
faef0170
HS		 1982 PL_eval_root = newUNOP(OP_LEAVEEVAL,
1983 ((PL_in_eval & EVAL_KEEPERR)
1984 ? OPf_SPECIAL : 0), o);
3280af22 1985 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 1986 PL_eval_root->op_private |= OPpREFCOUNTED;
1987 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 1988 PL_eval_root->op_next = 0;
1989 peep(PL_eval_start);
a0d0e21e
LW		 1990 }
1991 else {
5dc0d613 1992 if (!o)
a0d0e21e 1993 return;
3280af22
NIS		 1994 PL_main_root = scope(sawparens(scalarvoid(o)));
1995 PL_curcop = &PL_compiling;
1996 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 1997 PL_main_root->op_private |= OPpREFCOUNTED;
1998 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 1999 PL_main_root->op_next = 0;
2000 peep(PL_main_start);
2001 PL_compcv = 0;
3841441e 2002
4fdae800 2003 /* Register with debugger */
84902520 2004 if (PERLDB_INTER) {
864dbfa3 2005 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2006 if (cv) {
2007 dSP;
924508f0 2008 PUSHMARK(SP);
cc49e20b 2009 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2010 PUTBACK;
864dbfa3 2011 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2012 }
2013 }
79072805 2014 }
79072805
LW		 2015}
2016
2017OP *
864dbfa3 2018Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2019{
2020 if (o->op_flags & OPf_PARENS)
2021 list(o);
8990e307 2022 else {
d008e5eb 2023 dTHR;
599cee73 2024 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2025 char *s;
834a4ddd 2026 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2027 if (*s == ';' || *s == '=')
cea2e8a9 2028 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 2029 lex ? "my" : "local");
8990e307
LW		 2030 }
2031 }
3280af22
NIS		 2032 PL_in_my = FALSE;
2033 PL_in_my_stash = Nullhv;
93a17b20
LW		 2034 if (lex)
2035 return my(o);
2036 else
463ee0b2 2037 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 2038}
2039
2040OP *
864dbfa3 2041Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2042{
2043 if (o->op_type == OP_LIST) {
554b3eca
MB		 2044 OP *o2;
2045#ifdef USE_THREADS
2faa37cc 2046 o2 = newOP(OP_THREADSV, 0);
54b9620d 2047 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2048#else
2049 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2050#endif /* USE_THREADS */
2051 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2052 }
2053 return o;
2054}
2055
2056OP *
864dbfa3 2057Perl_fold_constants(pTHX_ register OP *o)
79072805 2058{
11343788 2059 dTHR;
79072805
LW		 2060 register OP *curop;
2061 I32 type = o->op_type;
748a9306 2062 SV *sv;
79072805 2063
22c35a8c 2064 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2065 scalar(o);
b162f9ea 2066 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2067 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2068
eac055e9
GS		 2069 /* integerize op, unless it happens to be C<-foo>.
2070 * XXX should pp_i_negate() do magic string negation instead? */
2071 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2072 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2073 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2074 {
22c35a8c 2075 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2076 }
85e6fe83 2077
22c35a8c 2078 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2079 goto nope;
2080
de939608 2081 switch (type) {
7a52d87a
GS		 2082 case OP_NEGATE:
2083 /* XXX might want a ck_negate() for this */
2084 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2085 break;
de939608
CS		 2086 case OP_SPRINTF:
2087 case OP_UCFIRST:
2088 case OP_LCFIRST:
2089 case OP_UC:
2090 case OP_LC:
69dcf70c
MB		 2091 case OP_SLT:
2092 case OP_SGT:
2093 case OP_SLE:
2094 case OP_SGE:
2095 case OP_SCMP:
2096
de939608
CS		 2097 if (o->op_private & OPpLOCALE)
2098 goto nope;
2099 }
2100
3280af22 2101 if (PL_error_count)
a0d0e21e
LW		 2102 goto nope; /* Don't try to run w/ errors */
2103
79072805 2104 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2105 if ((curop->op_type != OP_CONST ||
2106 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2107 curop->op_type != OP_LIST &&
2108 curop->op_type != OP_SCALAR &&
2109 curop->op_type != OP_NULL &&
2110 curop->op_type != OP_PUSHMARK)
2111 {
79072805
LW		 2112 goto nope;
2113 }
2114 }
2115
2116 curop = LINKLIST(o);
2117 o->op_next = 0;
533c011a 2118 PL_op = curop;
cea2e8a9 2119 CALLRUNOPS(aTHX);
3280af22 2120 sv = *(PL_stack_sp--);
748a9306 2121 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2122 pad_swipe(o->op_targ);
748a9306
LW		 2123 else if (SvTEMP(sv)) { /* grab mortal temp? */
2124 (void)SvREFCNT_inc(sv);
2125 SvTEMP_off(sv);
85e6fe83 2126 }
79072805
LW		 2127 op_free(o);
2128 if (type == OP_RV2GV)
b1cb66bf 2129 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2130 else {
ee580363
GS		 2131 /* try to smush double to int, but don't smush -2.0 to -2 */
2132 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2133 type != OP_NEGATE)
2134 {
748a9306 2135 IV iv = SvIV(sv);
65202027 2136 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2137 SvREFCNT_dec(sv);
2138 sv = newSViv(iv);
2139 }
b1cb66bf 2140 else
2141 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2142 }
2143 return newSVOP(OP_CONST, 0, sv);
2144 }
aeea060c 2145
79072805 2146 nope:
22c35a8c 2147 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2148 return o;
79072805 2149
3280af22 2150 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2151 if (type == OP_MODULO
2152 || type == OP_DIVIDE
2153 || !(o->op_flags & OPf_KIDS))
2154 {
85e6fe83 2155 return o;
4bb9f687 2156 }
85e6fe83
LW		 2157
2158 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2159 if (curop->op_type == OP_CONST) {
b1cb66bf 2160 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2161 continue;
2162 return o;
2163 }
22c35a8c 2164 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2165 continue;
2166 return o;
2167 }
22c35a8c 2168 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2169 }
2170
79072805
LW		 2171 return o;
2172}
2173
2174OP *
864dbfa3 2175Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2176{
11343788 2177 dTHR;
79072805 2178 register OP *curop;
3280af22 2179 I32 oldtmps_floor = PL_tmps_floor;
79072805 2180
a0d0e21e 2181 list(o);
3280af22 2182 if (PL_error_count)
a0d0e21e
LW		 2183 return o; /* Don't attempt to run with errors */
2184
533c011a 2185 PL_op = curop = LINKLIST(o);
a0d0e21e 2186 o->op_next = 0;
cea2e8a9
GS		 2187 pp_pushmark();
2188 CALLRUNOPS(aTHX);
533c011a 2189 PL_op = curop;
cea2e8a9 2190 pp_anonlist();
3280af22 2191 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2192
2193 o->op_type = OP_RV2AV;
22c35a8c 2194 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2195 curop = ((UNOP*)o)->op_first;
3280af22 2196 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2197 op_free(curop);
79072805
LW		 2198 linklist(o);
2199 return list(o);
2200}
2201
2202OP *
864dbfa3 2203Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2204{
2205 OP *kid;
a0d0e21e 2206 OP *last = 0;
79072805 2207
11343788
MB		 2208 if (!o || o->op_type != OP_LIST)
2209 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2210 else
5dc0d613 2211 o->op_flags &= ~OPf_WANT;
79072805 2212
22c35a8c 2213 if (!(PL_opargs[type] & OA_MARK))
11343788 2214 null(cLISTOPo->op_first);
8990e307 2215
11343788 2216 o->op_type = type;
22c35a8c 2217 o->op_ppaddr = PL_ppaddr[type];
11343788 2218 o->op_flags |= flags;
79072805 2219
11343788
MB		 2220 o = CHECKOP(type, o);
2221 if (o->op_type != type)
2222 return o;
79072805 2223
11343788 2224 if (cLISTOPo->op_children < 7) {
79072805 2225 /* XXX do we really need to do this if we're done appending?? */
11343788 2226 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2227 last = kid;
11343788 2228 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2229 }
2230
11343788 2231 return fold_constants(o);
79072805
LW		 2232}
2233
2234/* List constructors */
2235
2236OP *
864dbfa3 2237Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2238{
2239 if (!first)
2240 return last;
8990e307
LW		 2241
2242 if (!last)
79072805 2243 return first;
8990e307 2244
a0d0e21e
LW		 2245 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2246 return newLISTOP(type, 0, first, last);
79072805 2247
a0d0e21e
LW		 2248 if (first->op_flags & OPf_KIDS)
2249 ((LISTOP*)first)->op_last->op_sibling = last;
2250 else {
2251 first->op_flags |= OPf_KIDS;
2252 ((LISTOP*)first)->op_first = last;
2253 }
2254 ((LISTOP*)first)->op_last = last;
2255 ((LISTOP*)first)->op_children++;
2256 return first;
79072805
LW		 2257}
2258
2259OP *
864dbfa3 2260Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2261{
2262 if (!first)
2263 return (OP*)last;
8990e307
LW		 2264
2265 if (!last)
79072805 2266 return (OP*)first;
8990e307
LW		 2267
2268 if (first->op_type != type)
79072805 2269 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2270
2271 if (last->op_type != type)
79072805
LW		 2272 return append_elem(type, (OP*)first, (OP*)last);
2273
2274 first->op_last->op_sibling = last->op_first;
2275 first->op_last = last->op_last;
2276 first->op_children += last->op_children;
2277 if (first->op_children)
acb74605 2278 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2279
2280#ifdef PL_OP_SLAB_ALLOC
2281#else
2282 Safefree(last);
2283#endif
79072805
LW		 2284 return (OP*)first;
2285}
2286
2287OP *
864dbfa3 2288Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2289{
2290 if (!first)
2291 return last;
8990e307
LW		 2292
2293 if (!last)
79072805 2294 return first;
8990e307
LW		 2295
2296 if (last->op_type == type) {
2297 if (type == OP_LIST) { /* already a PUSHMARK there */
2298 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2299 ((LISTOP*)last)->op_first->op_sibling = first;
2300 }
2301 else {
2302 if (!(last->op_flags & OPf_KIDS)) {
2303 ((LISTOP*)last)->op_last = first;
2304 last->op_flags |= OPf_KIDS;
2305 }
2306 first->op_sibling = ((LISTOP*)last)->op_first;
2307 ((LISTOP*)last)->op_first = first;
79072805 2308 }
79072805
LW		 2309 ((LISTOP*)last)->op_children++;
2310 return last;
2311 }
2312
2313 return newLISTOP(type, 0, first, last);
2314}
2315
2316/* Constructors */
2317
2318OP *
864dbfa3 2319Perl_newNULLLIST(pTHX)
79072805 2320{
8990e307
LW		 2321 return newOP(OP_STUB, 0);
2322}
2323
2324OP *
864dbfa3 2325Perl_force_list(pTHX_ OP *o)
8990e307 2326{
11343788
MB		 2327 if (!o || o->op_type != OP_LIST)
2328 o = newLISTOP(OP_LIST, 0, o, Nullop);
2329 null(o);
2330 return o;
79072805
LW		 2331}
2332
2333OP *
864dbfa3 2334Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2335{
2336 LISTOP *listop;
2337
b7dc083c 2338 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2339
2340 listop->op_type = type;
22c35a8c 2341 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2342 listop->op_children = (first != 0) + (last != 0);
2343 listop->op_flags = flags;
79072805
LW		 2344
2345 if (!last && first)
2346 last = first;
2347 else if (!first && last)
2348 first = last;
8990e307
LW		 2349 else if (first)
2350 first->op_sibling = last;
79072805
LW		 2351 listop->op_first = first;
2352 listop->op_last = last;
8990e307
LW		 2353 if (type == OP_LIST) {
2354 OP* pushop;
2355 pushop = newOP(OP_PUSHMARK, 0);
2356 pushop->op_sibling = first;
2357 listop->op_first = pushop;
2358 listop->op_flags |= OPf_KIDS;
2359 if (!last)
2360 listop->op_last = pushop;
2361 }
2362 else if (listop->op_children)
2363 listop->op_flags |= OPf_KIDS;
79072805
LW		 2364
2365 return (OP*)listop;
2366}
2367
2368OP *
864dbfa3 2369Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2370{
11343788 2371 OP *o;
b7dc083c 2372 NewOp(1101, o, 1, OP);
11343788 2373 o->op_type = type;
22c35a8c 2374 o->op_ppaddr = PL_ppaddr[type];
11343788 2375 o->op_flags = flags;
79072805 2376
11343788
MB		 2377 o->op_next = o;
2378 o->op_private = 0 + (flags >> 8);
22c35a8c 2379 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2380 scalar(o);
22c35a8c 2381 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2382 o->op_targ = pad_alloc(type, SVs_PADTMP);
2383 return CHECKOP(type, o);
79072805
LW		 2384}
2385
2386OP *
864dbfa3 2387Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2388{
2389 UNOP *unop;
2390
93a17b20 2391 if (!first)
aeea060c 2392 first = newOP(OP_STUB, 0);
22c35a8c 2393 if (PL_opargs[type] & OA_MARK)
8990e307 2394 first = force_list(first);
93a17b20 2395
b7dc083c 2396 NewOp(1101, unop, 1, UNOP);
79072805 2397 unop->op_type = type;
22c35a8c 2398 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2399 unop->op_first = first;
2400 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2401 unop->op_private = 1 | (flags >> 8);
e50aee73 2402 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2403 if (unop->op_next)
2404 return (OP*)unop;
2405
a0d0e21e 2406 return fold_constants((OP *) unop);
79072805
LW		 2407}
2408
2409OP *
864dbfa3 2410Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2411{
2412 BINOP *binop;
b7dc083c 2413 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2414
2415 if (!first)
2416 first = newOP(OP_NULL, 0);
2417
2418 binop->op_type = type;
22c35a8c 2419 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2420 binop->op_first = first;
2421 binop->op_flags = flags | OPf_KIDS;
2422 if (!last) {
2423 last = first;
c07a80fd 2424 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2425 }
2426 else {
c07a80fd 2427 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2428 first->op_sibling = last;
2429 }
2430
e50aee73 2431 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2432 if (binop->op_next || binop->op_type != type)
79072805
LW		 2433 return (OP*)binop;
2434
7284ab6f 2435 binop->op_last = binop->op_first->op_sibling;
79072805 2436
a0d0e21e 2437 return fold_constants((OP *)binop);
79072805
LW		 2438}
2439
a0ed51b3
LW		 2440static int
2441utf8compare(const void *a, const void *b)
2442{
2443 int i;
2444 for (i = 0; i < 10; i++) {
2445 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2446 return -1;
2447 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2448 return 1;
2449 }
2450 return 0;
2451}
2452
79072805 2453OP *
864dbfa3 2454Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2455{
79072805
LW		 2456 SV *tstr = ((SVOP*)expr)->op_sv;
2457 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2458 STRLEN tlen;
2459 STRLEN rlen;
ec49126f 2460 register U8 *t = (U8*)SvPV(tstr, tlen);
2461 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2462 register I32 i;
2463 register I32 j;
a0ed51b3 2464 I32 del;
79072805 2465 I32 complement;
5d06d08e 2466 I32 squash;
79072805
LW		 2467 register short *tbl;
2468
11343788 2469 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2470 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2471 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2472
a0ed51b3 2473 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2474 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2475 SV* transv = 0;
2476 U8* tend = t + tlen;
2477 U8* rend = r + rlen;
2478 I32 ulen;
2479 U32 tfirst = 1;
2480 U32 tlast = 0;
2481 I32 tdiff;
2482 U32 rfirst = 1;
2483 U32 rlast = 0;
2484 I32 rdiff;
2485 I32 diff;
2486 I32 none = 0;
2487 U32 max = 0;
2488 I32 bits;
2489 I32 grows = 0;
2490 I32 havefinal = 0;
2491 U32 final;
2492 HV *hv;
2493 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2494 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2495
2496 if (complement) {
2497 U8 tmpbuf[10];
2498 U8** cp;
2499 UV nextmin = 0;
2500 New(1109, cp, tlen, U8*);
2501 i = 0;
79cb57f6 2502 transv = newSVpvn("",0);
a0ed51b3
LW		 2503 while (t < tend) {
2504 cp[i++] = t;
2505 t += UTF8SKIP(t);
2506 if (*t == 0xff) {
2507 t++;
2508 t += UTF8SKIP(t);
2509 }
2510 }
2511 qsort(cp, i, sizeof(U8*), utf8compare);
2512 for (j = 0; j < i; j++) {
2513 U8 *s = cp[j];
2514 UV val = utf8_to_uv(s, &ulen);
2515 s += ulen;
2516 diff = val - nextmin;
2517 if (diff > 0) {
2518 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2519 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2520 if (diff > 1) {
2521 t = uv_to_utf8(tmpbuf, val - 1);
2522 sv_catpvn(transv, "\377", 1);
dfe13c55 2523 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2524 }
2525 }
2526 if (*s == 0xff)
2527 val = utf8_to_uv(s+1, &ulen);
2528 if (val >= nextmin)
2529 nextmin = val + 1;
2530 }
2531 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2532 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2533 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2534 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2535 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2536 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2537 tlen = SvCUR(transv);
2538 tend = t + tlen;
2539 }
2540 else if (!rlen && !del) {
2541 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2542 }
2543 if (!squash) {
2544 if (to_utf && from_utf) { /* only counting characters */
2545 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2546 o->op_private |= OPpTRANS_IDENTICAL;
2547 }
2548 else { /* straight latin-1 translation */
2549 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2550 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2551 o->op_private |= OPpTRANS_IDENTICAL;
2552 }
a0ed51b3
LW		 2553 }
2554
2555 while (t < tend || tfirst <= tlast) {
2556 /* see if we need more "t" chars */
2557 if (tfirst > tlast) {
2558 tfirst = (I32)utf8_to_uv(t, &ulen);
2559 t += ulen;
2560 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2561 tlast = (I32)utf8_to_uv(++t, &ulen);
2562 t += ulen;
2563 }
2564 else
2565 tlast = tfirst;
2566 }
2567
2568 /* now see if we need more "r" chars */
2569 if (rfirst > rlast) {
2570 if (r < rend) {
2571 rfirst = (I32)utf8_to_uv(r, &ulen);
2572 r += ulen;
2573 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2574 rlast = (I32)utf8_to_uv(++r, &ulen);
2575 r += ulen;
2576 }
2577 else
2578 rlast = rfirst;
2579 }
2580 else {
2581 if (!havefinal++)
2582 final = rlast;
2583 rfirst = rlast = 0xffffffff;
2584 }
2585 }
2586
2587 /* now see which range will peter our first, if either. */
2588 tdiff = tlast - tfirst;
2589 rdiff = rlast - rfirst;
2590
2591 if (tdiff <= rdiff)
2592 diff = tdiff;
2593 else
2594 diff = rdiff;
2595
2596 if (rfirst == 0xffffffff) {
2597 diff = tdiff; /* oops, pretend rdiff is infinite */
2598 if (diff > 0)
cea2e8a9 2599 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
a0ed51b3 2600 else
cea2e8a9 2601 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\tXXXX\n", tfirst);
a0ed51b3
LW		 2602 }
2603 else {
2604 if (diff > 0)
cea2e8a9 2605 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
a0ed51b3 2606 else
cea2e8a9 2607 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\t%04x\n", tfirst, rfirst);
a0ed51b3
LW		 2608
2609 if (rfirst + diff > max)
2610 max = rfirst + diff;
2611 rfirst += diff + 1;
2612 if (!grows) {
2613 if (rfirst <= 0x80)
2614 ;
2615 else if (rfirst <= 0x800)
2616 grows |= (tfirst < 0x80);
2617 else if (rfirst <= 0x10000)
2618 grows |= (tfirst < 0x800);
2619 else if (rfirst <= 0x200000)
2620 grows |= (tfirst < 0x10000);
2621 else if (rfirst <= 0x4000000)
2622 grows |= (tfirst < 0x200000);
2623 else if (rfirst <= 0x80000000)
2624 grows |= (tfirst < 0x4000000);
2625 }
2626 }
2627 tfirst += diff + 1;
2628 }
2629
2630 none = ++max;
2631 if (del)
2632 del = ++max;
2633
2634 if (max > 0xffff)
2635 bits = 32;
2636 else if (max > 0xff)
2637 bits = 16;
2638 else
2639 bits = 8;
2640
2641 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2642 SvREFCNT_dec(listsv);
2643 if (transv)
2644 SvREFCNT_dec(transv);
2645
2646 if (!del && havefinal)
2647 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2648
2649 if (grows && to_utf)
2650 o->op_private |= OPpTRANS_GROWS;
2651
2652 op_free(expr);
2653 op_free(repl);
2654 return o;
2655 }
2656
2657 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2658 if (complement) {
2659 Zero(tbl, 256, short);
2660 for (i = 0; i < tlen; i++)
ec49126f 2661 tbl[t[i]] = -1;
79072805
LW		 2662 for (i = 0, j = 0; i < 256; i++) {
2663 if (!tbl[i]) {
2664 if (j >= rlen) {
a0ed51b3 2665 if (del)
79072805
LW		 2666 tbl[i] = -2;
2667 else if (rlen)
ec49126f 2668 tbl[i] = r[j-1];
79072805
LW		 2669 else
2670 tbl[i] = i;
2671 }
2672 else
ec49126f 2673 tbl[i] = r[j++];
79072805
LW		 2674 }
2675 }
2676 }
2677 else {
a0ed51b3 2678 if (!rlen && !del) {
79072805 2679 r = t; rlen = tlen;
5d06d08e 2680 if (!squash)
4757a243 2681 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2682 }
2683 for (i = 0; i < 256; i++)
2684 tbl[i] = -1;
2685 for (i = 0, j = 0; i < tlen; i++,j++) {
2686 if (j >= rlen) {
a0ed51b3 2687 if (del) {
ec49126f 2688 if (tbl[t[i]] == -1)
2689 tbl[t[i]] = -2;
79072805
LW		 2690 continue;
2691 }
2692 --j;
2693 }
ec49126f 2694 if (tbl[t[i]] == -1)
2695 tbl[t[i]] = r[j];
79072805
LW		 2696 }
2697 }
2698 op_free(expr);
2699 op_free(repl);
2700
11343788 2701 return o;
79072805
LW		 2702}
2703
2704OP *
864dbfa3 2705Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2706{
11343788 2707 dTHR;
79072805
LW		 2708 PMOP *pmop;
2709
b7dc083c 2710 NewOp(1101, pmop, 1, PMOP);
79072805 2711 pmop->op_type = type;
22c35a8c 2712 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2713 pmop->op_flags = flags;
c07a80fd 2714 pmop->op_private = 0 | (flags >> 8);
79072805 2715
3280af22 2716 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2717 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2718 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2719 pmop->op_pmpermflags |= PMf_LOCALE;
2720 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2721
79072805 2722 /* link into pm list */
3280af22
NIS		 2723 if (type != OP_TRANS && PL_curstash) {
2724 pmop->op_pmnext = HvPMROOT(PL_curstash);
2725 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2726 }
2727
2728 return (OP*)pmop;
2729}
2730
2731OP *
864dbfa3 2732Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2733{
5c0ca799 2734 dTHR;
79072805
LW		 2735 PMOP *pm;
2736 LOGOP *rcop;
ce862d02 2737 I32 repl_has_vars = 0;
79072805 2738
11343788
MB		 2739 if (o->op_type == OP_TRANS)
2740 return pmtrans(o, expr, repl);
79072805 2741
3280af22 2742 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2743 pm = (PMOP*)o;
79072805
LW		 2744
2745 if (expr->op_type == OP_CONST) {
463ee0b2 2746 STRLEN plen;
79072805 2747 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2748 char *p = SvPV(pat, plen);
11343788 2749 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2750 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2751 p = SvPV(pat, plen);
79072805
LW		 2752 pm->op_pmflags |= PMf_SKIPWHITE;
2753 }
cea2e8a9 2754 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2755 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2756 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2757 op_free(expr);
2758 }
2759 else {
3280af22
NIS		 2760 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2761 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2762 ? OP_REGCRESET
2763 : OP_REGCMAYBE),0,expr);
463ee0b2 2764
b7dc083c 2765 NewOp(1101, rcop, 1, LOGOP);
79072805 2766 rcop->op_type = OP_REGCOMP;
22c35a8c 2767 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2768 rcop->op_first = scalar(expr);
3280af22 2769 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2770 ? (OPf_SPECIAL | OPf_KIDS)
2771 : OPf_KIDS);
79072805 2772 rcop->op_private = 1;
11343788 2773 rcop->op_other = o;
79072805
LW		 2774
2775 /* establish postfix order */
3280af22 2776 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2777 LINKLIST(expr);
2778 rcop->op_next = expr;
2779 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2780 }
2781 else {
2782 rcop->op_next = LINKLIST(expr);
2783 expr->op_next = (OP*)rcop;
2784 }
79072805 2785
11343788 2786 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2787 }
2788
2789 if (repl) {
748a9306 2790 OP *curop;
0244c3a4 2791 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2792 curop = 0;
0244c3a4
GS		 2793 if (PL_curcop->cop_line < PL_multi_end)
2794 PL_curcop->cop_line = PL_multi_end;
2795 }
554b3eca 2796#ifdef USE_THREADS
2faa37cc 2797 else if (repl->op_type == OP_THREADSV
554b3eca 2798 && strchr("&`'123456789+",
533c011a 2799 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2800 {
2801 curop = 0;
2802 }
2803#endif /* USE_THREADS */
748a9306
LW		 2804 else if (repl->op_type == OP_CONST)
2805 curop = repl;
79072805 2806 else {
79072805
LW		 2807 OP *lastop = 0;
2808 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2809 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2810#ifdef USE_THREADS
ce862d02
IZ		 2811 if (curop->op_type == OP_THREADSV) {
2812 repl_has_vars = 1;
be949f6f 2813 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2814 break;
554b3eca
MB		 2815 }
2816#else
79072805 2817 if (curop->op_type == OP_GV) {
7934575e 2818 GV *gv = (GV*)((SVOP*)curop)->op_sv;
ce862d02 2819 repl_has_vars = 1;
93a17b20 2820 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2821 break;
2822 }
554b3eca 2823#endif /* USE_THREADS */
79072805
LW		 2824 else if (curop->op_type == OP_RV2CV)
2825 break;
2826 else if (curop->op_type == OP_RV2SV ||
2827 curop->op_type == OP_RV2AV ||
2828 curop->op_type == OP_RV2HV ||
2829 curop->op_type == OP_RV2GV) {
2830 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2831 break;
2832 }
748a9306
LW		 2833 else if (curop->op_type == OP_PADSV ||
2834 curop->op_type == OP_PADAV ||
2835 curop->op_type == OP_PADHV ||
554b3eca 2836 curop->op_type == OP_PADANY) {
ce862d02 2837 repl_has_vars = 1;
748a9306 2838 }
1167e5da
SM		 2839 else if (curop->op_type == OP_PUSHRE)
2840 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2841 else
2842 break;
2843 }
2844 lastop = curop;
2845 }
748a9306 2846 }
ce862d02
IZ		 2847 if (curop == repl
2848 && !(repl_has_vars
2849 && (!pm->op_pmregexp
2850 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2851 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2852 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2853 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2854 }
2855 else {
ce862d02
IZ		 2856 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2857 pm->op_pmflags |= PMf_MAYBE_CONST;
2858 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2859 }
b7dc083c 2860 NewOp(1101, rcop, 1, LOGOP);
748a9306 2861 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2862 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2863 rcop->op_first = scalar(repl);
2864 rcop->op_flags |= OPf_KIDS;
2865 rcop->op_private = 1;
11343788 2866 rcop->op_other = o;
748a9306
LW		 2867
2868 /* establish postfix order */
2869 rcop->op_next = LINKLIST(repl);
2870 repl->op_next = (OP*)rcop;
2871
2872 pm->op_pmreplroot = scalar((OP*)rcop);
2873 pm->op_pmreplstart = LINKLIST(rcop);
2874 rcop->op_next = 0;
79072805
LW		 2875 }
2876 }
2877
2878 return (OP*)pm;
2879}
2880
2881OP *
864dbfa3 2882Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2883{
2884 SVOP *svop;
b7dc083c 2885 NewOp(1101, svop, 1, SVOP);
79072805 2886 svop->op_type = type;
22c35a8c 2887 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2888 svop->op_sv = sv;
2889 svop->op_next = (OP*)svop;
2890 svop->op_flags = flags;
22c35a8c 2891 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2892 scalar((OP*)svop);
22c35a8c 2893 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2894 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2895 return CHECKOP(type, svop);
79072805
LW		 2896}
2897
2898OP *
864dbfa3 2899Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 2900{
11343788 2901 dTHR;
7934575e 2902 return newSVOP(type, flags, SvREFCNT_inc(gv));
79072805
LW		 2903}
2904
2905OP *
864dbfa3 2906Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 2907{
2908 PVOP *pvop;
b7dc083c 2909 NewOp(1101, pvop, 1, PVOP);
79072805 2910 pvop->op_type = type;
22c35a8c 2911 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2912 pvop->op_pv = pv;
2913 pvop->op_next = (OP*)pvop;
2914 pvop->op_flags = flags;
22c35a8c 2915 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2916 scalar((OP*)pvop);
22c35a8c 2917 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2918 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2919 return CHECKOP(type, pvop);
79072805
LW		 2920}
2921
79072805 2922void
864dbfa3 2923Perl_package(pTHX_ OP *o)
79072805 2924{
11343788 2925 dTHR;
93a17b20 2926 SV *sv;
79072805 2927
3280af22
NIS		 2928 save_hptr(&PL_curstash);
2929 save_item(PL_curstname);
11343788 2930 if (o) {
463ee0b2
LW		 2931 STRLEN len;
2932 char *name;
11343788 2933 sv = cSVOPo->op_sv;
463ee0b2 2934 name = SvPV(sv, len);
3280af22
NIS		 2935 PL_curstash = gv_stashpvn(name,len,TRUE);
2936 sv_setpvn(PL_curstname, name, len);
11343788 2937 op_free(o);
93a17b20
LW		 2938 }
2939 else {
3280af22
NIS		 2940 sv_setpv(PL_curstname,"<none>");
2941 PL_curstash = Nullhv;
93a17b20 2942 }
7ad382f4 2943 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2944 PL_copline = NOLINE;
2945 PL_expect = XSTATE;
79072805
LW		 2946}
2947
85e6fe83 2948void
864dbfa3 2949Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2950{
a0d0e21e
LW		 2951 OP *pack;
2952 OP *meth;
2953 OP *rqop;
2954 OP *imop;
b1cb66bf 2955 OP *veop;
78ca652e 2956 GV *gv;
85e6fe83 2957
a0d0e21e 2958 if (id->op_type != OP_CONST)
cea2e8a9 2959 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 2960
b1cb66bf 2961 veop = Nullop;
2962
2963 if(version != Nullop) {
2964 SV *vesv = ((SVOP*)version)->op_sv;
2965
2966 if (arg == Nullop && !SvNIOK(vesv)) {
2967 arg = version;
2968 }
2969 else {
2970 OP *pack;
b1cb66bf 2971
2972 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 2973 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 2974
2975 /* Make copy of id so we don't free it twice */
2976 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2977
2978 /* Fake up a method call to VERSION */
b1cb66bf 2979 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2980 append_elem(OP_LIST,
2981 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 2982 newSVOP(OP_METHOD_NAMED, 0,
2983 newSVpvn("VERSION", 7))));
b1cb66bf 2984 }
2985 }
aeea060c 2986
a0d0e21e 2987 /* Fake up an import/unimport */
4633a7c4
LW		 2988 if (arg && arg->op_type == OP_STUB)
2989 imop = arg; /* no import on explicit () */
b1cb66bf 2990 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2991 imop = Nullop; /* use 5.0; */
2992 }
4633a7c4
LW		 2993 else {
2994 /* Make copy of id so we don't free it twice */
2995 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 2996 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2997 append_elem(OP_LIST,
2998 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 2999 newSVOP(OP_METHOD_NAMED, 0,
3000 aver ? newSVpvn("import", 6)
3001 : newSVpvn("unimport", 8))));
4633a7c4
LW		 3002 }
3003
78ca652e
GS		 3004 /* Fake up a require, handle override, if any */
3005 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3006 if (!(gv && GvIMPORTED_CV(gv)))
3007 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3008
3009 if (gv && GvIMPORTED_CV(gv)) {
3010 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3011 append_elem(OP_LIST, id,
3012 scalar(newUNOP(OP_RV2CV, 0,
3013 newGVOP(OP_GV, 0,
3014 gv))))));
3015 }
3016 else {
3017 rqop = newUNOP(OP_REQUIRE, 0, id);
3018 }
a0d0e21e
LW		 3019
3020 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3021 newATTRSUB(floor,
79cb57f6 3022 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3023 Nullop,
09bef843 3024 Nullop,
a0d0e21e 3025 append_elem(OP_LINESEQ,
b1cb66bf 3026 append_elem(OP_LINESEQ,
3027 newSTATEOP(0, Nullch, rqop),
3028 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3029 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3030
c305c6a0 3031 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3032 PL_copline = NOLINE;
3033 PL_expect = XSTATE;
85e6fe83
LW		 3034}
3035
79072805 3036OP *
864dbfa3 3037Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3038{
3039 OP *doop;
3040 GV *gv;
3041
3042 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3043 if (!(gv && GvIMPORTED_CV(gv)))
3044 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3045
3046 if (gv && GvIMPORTED_CV(gv)) {
3047 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3048 append_elem(OP_LIST, term,
3049 scalar(newUNOP(OP_RV2CV, 0,
3050 newGVOP(OP_GV, 0,
3051 gv))))));
3052 }
3053 else {
3054 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3055 }
3056 return doop;
3057}
3058
3059OP *
864dbfa3 3060Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3061{
3062 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3063 list(force_list(subscript)),
3064 list(force_list(listval)) );
79072805
LW		 3065}
3066
76e3520e 3067STATIC I32
cea2e8a9 3068S_list_assignment(pTHX_ register OP *o)
79072805 3069{
11343788 3070 if (!o)
79072805
LW		 3071 return TRUE;
3072
11343788
MB		 3073 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3074 o = cUNOPo->op_first;
79072805 3075
11343788 3076 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3077 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3078 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3079
3080 if (t && f)
3081 return TRUE;
3082 if (t || f)
3083 yyerror("Assignment to both a list and a scalar");
3084 return FALSE;
3085 }
3086
11343788
MB		 3087 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3088 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3089 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3090 return TRUE;
3091
11343788 3092 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3093 return TRUE;
3094
11343788 3095 if (o->op_type == OP_RV2SV)
79072805
LW		 3096 return FALSE;
3097
3098 return FALSE;
3099}
3100
3101OP *
864dbfa3 3102Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3103{
11343788 3104 OP *o;
79072805 3105
a0d0e21e
LW		 3106 if (optype) {
3107 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3108 return newLOGOP(optype, 0,
3109 mod(scalar(left), optype),
3110 newUNOP(OP_SASSIGN, 0, scalar(right)));
3111 }
3112 else {
3113 return newBINOP(optype, OPf_STACKED,
3114 mod(scalar(left), optype), scalar(right));
3115 }
3116 }
3117
79072805 3118 if (list_assignment(left)) {
6ee623d5 3119 dTHR;
3280af22
NIS		 3120 PL_modcount = 0;
3121 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3122 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3123 if (PL_eval_start)
3124 PL_eval_start = 0;
748a9306 3125 else {
a0d0e21e
LW		 3126 op_free(left);
3127 op_free(right);
3128 return Nullop;
3129 }
11343788 3130 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 3131 list(force_list(right)),
3132 list(force_list(left)) );
11343788 3133 o->op_private = 0 | (flags >> 8);
a0d0e21e 3134 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 3135 OP *curop;
11343788 3136 OP *lastop = o;
3280af22 3137 PL_generation++;
11343788 3138 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3139 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3140 if (curop->op_type == OP_GV) {
7934575e 3141 GV *gv = (GV*)((SVOP*)curop)->op_sv;
3280af22 3142 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3143 break;
3280af22 3144 SvCUR(gv) = PL_generation;
79072805 3145 }
748a9306
LW		 3146 else if (curop->op_type == OP_PADSV ||
3147 curop->op_type == OP_PADAV ||
3148 curop->op_type == OP_PADHV ||
3149 curop->op_type == OP_PADANY) {
3280af22 3150 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3151 SV *sv = svp[curop->op_targ];
3280af22 3152 if (SvCUR(sv) == PL_generation)
748a9306 3153 break;
3280af22 3154 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3155 }
79072805
LW		 3156 else if (curop->op_type == OP_RV2CV)
3157 break;
3158 else if (curop->op_type == OP_RV2SV ||
3159 curop->op_type == OP_RV2AV ||
3160 curop->op_type == OP_RV2HV ||
3161 curop->op_type == OP_RV2GV) {
3162 if (lastop->op_type != OP_GV) /* funny deref? */
3163 break;
3164 }
1167e5da
SM		 3165 else if (curop->op_type == OP_PUSHRE) {
3166 if (((PMOP*)curop)->op_pmreplroot) {
3167 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3168 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3169 break;
3280af22 3170 SvCUR(gv) = PL_generation;
1167e5da
SM		 3171 }
3172 }
79072805
LW		 3173 else
3174 break;
3175 }
3176 lastop = curop;
3177 }
11343788
MB		 3178 if (curop != o)
3179 o->op_private = OPpASSIGN_COMMON;
79072805 3180 }
c07a80fd 3181 if (right && right->op_type == OP_SPLIT) {
3182 OP* tmpop;
3183 if ((tmpop = ((LISTOP*)right)->op_first) &&
3184 tmpop->op_type == OP_PUSHRE)
3185 {
3186 PMOP *pm = (PMOP*)tmpop;
3187 if (left->op_type == OP_RV2AV &&
3188 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3189 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3190 {
3191 tmpop = ((UNOP*)left)->op_first;
3192 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
7934575e 3193 pm->op_pmreplroot = (OP*)((SVOP*)tmpop)->op_sv;
c07a80fd 3194 pm->op_pmflags |= PMf_ONCE;
11343788 3195 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3196 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3197 tmpop->op_sibling = Nullop; /* don't free split */
3198 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3199 op_free(o); /* blow off assign */
54310121 3200 right->op_flags &= ~OPf_WANT;
a5f75d66 3201 /* "I don't know and I don't care." */
c07a80fd 3202 return right;
3203 }
3204 }
3205 else {
3280af22 3206 if (PL_modcount < 10000 &&
c07a80fd 3207 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3208 {
3209 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3210 if (SvIVX(sv) == 0)
3280af22 3211 sv_setiv(sv, PL_modcount+1);
c07a80fd 3212 }
3213 }
3214 }
3215 }
11343788 3216 return o;
79072805
LW		 3217 }
3218 if (!right)
3219 right = newOP(OP_UNDEF, 0);
3220 if (right->op_type == OP_READLINE) {
3221 right->op_flags |= OPf_STACKED;
463ee0b2 3222 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3223 }
a0d0e21e 3224 else {
3280af22 3225 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3226 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3227 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3228 if (PL_eval_start)
3229 PL_eval_start = 0;
748a9306 3230 else {
11343788 3231 op_free(o);
a0d0e21e
LW		 3232 return Nullop;
3233 }
3234 }
11343788 3235 return o;
79072805
LW		 3236}
3237
3238OP *
864dbfa3 3239Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3240{
11343788 3241 dTHR;
bbce6d69 3242 U32 seq = intro_my();
79072805
LW		 3243 register COP *cop;
3244
b7dc083c 3245 NewOp(1101, cop, 1, COP);
3280af22 3246 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 3247 cop->op_type = OP_DBSTATE;
22c35a8c 3248 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3249 }
3250 else {
3251 cop->op_type = OP_NEXTSTATE;
22c35a8c 3252 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3253 }
79072805 3254 cop->op_flags = flags;
a0ed51b3 3255 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3256#ifdef NATIVE_HINTS
3257 cop->op_private |= NATIVE_HINTS;
3258#endif
e24b16f9 3259 PL_compiling.op_private = cop->op_private;
79072805
LW		 3260 cop->op_next = (OP*)cop;
3261
463ee0b2
LW		 3262 if (label) {
3263 cop->cop_label = label;
3280af22 3264 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3265 }
bbce6d69 3266 cop->cop_seq = seq;
3280af22 3267 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3268 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3269 cop->cop_warnings = PL_curcop->cop_warnings ;
3270 else
3271 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3272
79072805 3273
3280af22
NIS		 3274 if (PL_copline == NOLINE)
3275 cop->cop_line = PL_curcop->cop_line;
79072805 3276 else {
cc49e20b 3277 cop->cop_line = PL_copline;
3280af22 3278 PL_copline = NOLINE;
79072805 3279 }
cc49e20b 3280 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
3280af22 3281 cop->cop_stash = PL_curstash;
79072805 3282
3280af22 3283 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3284 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3285 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3286 (void)SvIOK_on(*svp);
a5f75d66 3287 SvIVX(*svp) = 1;
93a17b20
LW		 3288 SvSTASH(*svp) = (HV*)cop;
3289 }
3290 }
3291
11343788 3292 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3293}
3294
bbce6d69 3295/* "Introduce" my variables to visible status. */
3296U32
864dbfa3 3297Perl_intro_my(pTHX)
bbce6d69 3298{
3299 SV **svp;
3300 SV *sv;
3301 I32 i;
3302
3280af22
NIS		 3303 if (! PL_min_intro_pending)
3304 return PL_cop_seqmax;
bbce6d69 3305
3280af22
NIS		 3306 svp = AvARRAY(PL_comppad_name);
3307 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3308 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3309 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3310 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3311 }
3312 }
3280af22
NIS		 3313 PL_min_intro_pending = 0;
3314 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3315 return PL_cop_seqmax++;
bbce6d69 3316}
3317
79072805 3318OP *
864dbfa3 3319Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3320{
883ffac3
CS		 3321 return new_logop(type, flags, &first, &other);
3322}
3323
3bd495df 3324STATIC OP *
cea2e8a9 3325S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3326{
11343788 3327 dTHR;
79072805 3328 LOGOP *logop;
11343788 3329 OP *o;
883ffac3
CS		 3330 OP *first = *firstp;
3331 OP *other = *otherp;
79072805 3332
a0d0e21e
LW		 3333 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3334 return newBINOP(type, flags, scalar(first), scalar(other));
3335
8990e307 3336 scalarboolean(first);
79072805
LW		 3337 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3338 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3339 if (type == OP_AND || type == OP_OR) {
3340 if (type == OP_AND)
3341 type = OP_OR;
3342 else
3343 type = OP_AND;
11343788 3344 o = first;
883ffac3 3345 first = *firstp = cUNOPo->op_first;
11343788
MB		 3346 if (o->op_next)
3347 first->op_next = o->op_next;
3348 cUNOPo->op_first = Nullop;
3349 op_free(o);
79072805
LW		 3350 }
3351 }
3352 if (first->op_type == OP_CONST) {
599cee73 3353 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3354 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3355 PL_op_desc[type]);
79072805
LW		 3356 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3357 op_free(first);
883ffac3 3358 *firstp = Nullop;
79072805
LW		 3359 return other;
3360 }
3361 else {
3362 op_free(other);
883ffac3 3363 *otherp = Nullop;
79072805
LW		 3364 return first;
3365 }
3366 }
3367 else if (first->op_type == OP_WANTARRAY) {
3368 if (type == OP_AND)
3369 list(other);
3370 else
3371 scalar(other);
3372 }
599cee73 3373 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3374 OP *k1 = ((UNOP*)first)->op_first;
3375 OP *k2 = k1->op_sibling;
3376 OPCODE warnop = 0;
3377 switch (first->op_type)
3378 {
3379 case OP_NULL:
3380 if (k2 && k2->op_type == OP_READLINE
3381 && (k2->op_flags & OPf_STACKED)
55d729e4 3382 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3383 {
a6006777 3384 warnop = k2->op_type;
72b16652 3385 }
a6006777 3386 break;
3387
3388 case OP_SASSIGN:
68dc0745 3389 if (k1->op_type == OP_READDIR
3390 || k1->op_type == OP_GLOB
72b16652 3391 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3392 || k1->op_type == OP_EACH)
72b16652
GS		 3393 {
3394 warnop = ((k1->op_type == OP_NULL)
3395 ? k1->op_targ : k1->op_type);
3396 }
a6006777 3397 break;
3398 }
8ebc5c01 3399 if (warnop) {
3280af22
NIS		 3400 line_t oldline = PL_curcop->cop_line;
3401 PL_curcop->cop_line = PL_copline;
cea2e8a9 3402 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3403 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3404 PL_op_desc[warnop],
68dc0745 3405 ((warnop == OP_READLINE || warnop == OP_GLOB)
3406 ? " construct" : "() operator"));
3280af22 3407 PL_curcop->cop_line = oldline;
8ebc5c01 3408 }
a6006777 3409 }
79072805
LW		 3410
3411 if (!other)
3412 return first;
3413
a0d0e21e
LW		 3414 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3415 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3416
b7dc083c 3417 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3418
3419 logop->op_type = type;
22c35a8c 3420 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3421 logop->op_first = first;
3422 logop->op_flags = flags | OPf_KIDS;
3423 logop->op_other = LINKLIST(other);
c07a80fd 3424 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3425
3426 /* establish postfix order */
3427 logop->op_next = LINKLIST(first);
3428 first->op_next = (OP*)logop;
3429 first->op_sibling = other;
3430
11343788
MB		 3431 o = newUNOP(OP_NULL, 0, (OP*)logop);
3432 other->op_next = o;
79072805 3433
11343788 3434 return o;
79072805
LW		 3435}
3436
3437OP *
864dbfa3 3438Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3439{
11343788 3440 dTHR;
1a67a97c
SM		 3441 LOGOP *logop;
3442 OP *start;
11343788 3443 OP *o;
79072805 3444
b1cb66bf 3445 if (!falseop)
3446 return newLOGOP(OP_AND, 0, first, trueop);
3447 if (!trueop)
3448 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3449
8990e307 3450 scalarboolean(first);
79072805
LW		 3451 if (first->op_type == OP_CONST) {
3452 if (SvTRUE(((SVOP*)first)->op_sv)) {
3453 op_free(first);
b1cb66bf 3454 op_free(falseop);
3455 return trueop;
79072805
LW		 3456 }
3457 else {
3458 op_free(first);
b1cb66bf 3459 op_free(trueop);
3460 return falseop;
79072805
LW		 3461 }
3462 }
3463 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3464 list(trueop);
3465 scalar(falseop);
79072805 3466 }
1a67a97c
SM		 3467 NewOp(1101, logop, 1, LOGOP);
3468 logop->op_type = OP_COND_EXPR;
3469 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3470 logop->op_first = first;
3471 logop->op_flags = flags | OPf_KIDS;
3472 logop->op_private = 1 | (flags >> 8);
3473 logop->op_other = LINKLIST(trueop);
3474 logop->op_next = LINKLIST(falseop);
79072805 3475
79072805
LW		 3476
3477 /* establish postfix order */
1a67a97c
SM		 3478 start = LINKLIST(first);
3479 first->op_next = (OP*)logop;
79072805 3480
b1cb66bf 3481 first->op_sibling = trueop;
3482 trueop->op_sibling = falseop;
1a67a97c 3483 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3484
1a67a97c 3485 trueop->op_next = falseop->op_next = o;
79072805 3486
1a67a97c 3487 o->op_next = start;
11343788 3488 return o;
79072805
LW		 3489}
3490
3491OP *
864dbfa3 3492Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3493{
b35b2403 3494 dTHR;
1a67a97c 3495 LOGOP *range;
79072805
LW		 3496 OP *flip;
3497 OP *flop;
1a67a97c 3498 OP *leftstart;
11343788 3499 OP *o;
79072805 3500
1a67a97c 3501 NewOp(1101, range, 1, LOGOP);
79072805 3502
1a67a97c
SM		 3503 range->op_type = OP_RANGE;
3504 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3505 range->op_first = left;
3506 range->op_flags = OPf_KIDS;
3507 leftstart = LINKLIST(left);
3508 range->op_other = LINKLIST(right);
3509 range->op_private = 1 | (flags >> 8);
79072805
LW		 3510
3511 left->op_sibling = right;
3512
1a67a97c
SM		 3513 range->op_next = (OP*)range;
3514 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3515 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3516 o = newUNOP(OP_NULL, 0, flop);
79072805 3517 linklist(flop);
1a67a97c 3518 range->op_next = leftstart;
79072805
LW		 3519
3520 left->op_next = flip;
3521 right->op_next = flop;
3522
1a67a97c
SM		 3523 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3524 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3525 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3526 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3527
3528 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3529 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3530
11343788 3531 flip->op_next = o;
79072805 3532 if (!flip->op_private || !flop->op_private)
11343788 3533 linklist(o); /* blow off optimizer unless constant */
79072805 3534
11343788 3535 return o;
79072805
LW		 3536}
3537
3538OP *
864dbfa3 3539Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3540{
11343788 3541 dTHR;
463ee0b2 3542 OP* listop;
11343788 3543 OP* o;
463ee0b2 3544 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3545 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3546
463ee0b2
LW		 3547 if (expr) {
3548 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3549 return block; /* do {} while 0 does once */
fb73857a 3550 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3551 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3552 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3553 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3554 } else if (expr->op_flags & OPf_KIDS) {
3555 OP *k1 = ((UNOP*)expr)->op_first;
3556 OP *k2 = (k1) ? k1->op_sibling : NULL;
3557 switch (expr->op_type) {
3558 case OP_NULL:
3559 if (k2 && k2->op_type == OP_READLINE
3560 && (k2->op_flags & OPf_STACKED)
3561 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3562 expr = newUNOP(OP_DEFINED, 0, expr);
3563 break;
3564
3565 case OP_SASSIGN:
3566 if (k1->op_type == OP_READDIR
3567 || k1->op_type == OP_GLOB
72b16652 3568 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3569 || k1->op_type == OP_EACH)
3570 expr = newUNOP(OP_DEFINED, 0, expr);
3571 break;
3572 }
774d564b 3573 }
463ee0b2 3574 }
93a17b20 3575
8990e307 3576 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3577 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3578
883ffac3
CS		 3579 if (listop)
3580 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3581
11343788
MB		 3582 if (once && o != listop)
3583 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3584
11343788
MB		 3585 if (o == listop)
3586 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3587
11343788
MB		 3588 o->op_flags |= flags;
3589 o = scope(o);
3590 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3591 return o;
79072805
LW		 3592}
3593
3594OP *
864dbfa3 3595Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3596{
11343788 3597 dTHR;
79072805
LW		 3598 OP *redo;
3599 OP *next = 0;
3600 OP *listop;
11343788 3601 OP *o;
79072805
LW		 3602 OP *condop;
3603
fb73857a 3604 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3605 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3606 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3607 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3608 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3609 OP *k1 = ((UNOP*)expr)->op_first;
3610 OP *k2 = (k1) ? k1->op_sibling : NULL;
3611 switch (expr->op_type) {
3612 case OP_NULL:
3613 if (k2 && k2->op_type == OP_READLINE
3614 && (k2->op_flags & OPf_STACKED)
3615 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3616 expr = newUNOP(OP_DEFINED, 0, expr);
3617 break;
3618
3619 case OP_SASSIGN:
3620 if (k1->op_type == OP_READDIR
3621 || k1->op_type == OP_GLOB
72b16652 3622 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3623 || k1->op_type == OP_EACH)
3624 expr = newUNOP(OP_DEFINED, 0, expr);
3625 break;
3626 }
748a9306 3627 }
79072805
LW		 3628
3629 if (!block)
3630 block = newOP(OP_NULL, 0);
3631
3632 if (cont)
3633 next = LINKLIST(cont);
fb73857a 3634 if (expr) {
79072805 3635 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3636 if ((line_t)whileline != NOLINE) {
3280af22 3637 PL_copline = whileline;
fb73857a 3638 cont = append_elem(OP_LINESEQ, cont,
3639 newSTATEOP(0, Nullch, Nullop));
3640 }
3641 }
79072805 3642
463ee0b2 3643 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3644 redo = LINKLIST(listop);
3645
3646 if (expr) {
3280af22 3647 PL_copline = whileline;
883ffac3
CS		 3648 scalar(listop);
3649 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3650 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3651 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3652 op_free((OP*)loop);
883ffac3 3653 return Nullop; /* listop already freed by new_logop */
463ee0b2 3654 }
883ffac3
CS		 3655 if (listop)
3656 ((LISTOP*)listop)->op_last->op_next = condop =
3657 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3658 if (!next)
3659 next = condop;
3660 }
3661 else
11343788 3662 o = listop;
79072805
LW		 3663
3664 if (!loop) {
b7dc083c 3665 NewOp(1101,loop,1,LOOP);
79072805 3666 loop->op_type = OP_ENTERLOOP;
22c35a8c 3667 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3668 loop->op_private = 0;
3669 loop->op_next = (OP*)loop;
3670 }
3671
11343788 3672 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3673
3674 loop->op_redoop = redo;
11343788 3675 loop->op_lastop = o;
79072805
LW		 3676
3677 if (next)
3678 loop->op_nextop = next;
3679 else
11343788 3680 loop->op_nextop = o;
79072805 3681
11343788
MB		 3682 o->op_flags |= flags;
3683 o->op_private |= (flags >> 8);
3684 return o;
79072805
LW		 3685}
3686
3687OP *
864dbfa3 3688Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3689{
3690 LOOP *loop;
b7dc083c 3691 LOOP *tmp;
fb73857a 3692 OP *wop;
85e6fe83 3693 int padoff = 0;
4633a7c4 3694 I32 iterflags = 0;
79072805 3695
79072805 3696 if (sv) {
85e6fe83 3697 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3698 sv->op_type = OP_RV2GV;
22c35a8c 3699 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3700 }
85e6fe83
LW		 3701 else if (sv->op_type == OP_PADSV) { /* private variable */
3702 padoff = sv->op_targ;
3703 op_free(sv);
3704 sv = Nullop;
3705 }
54b9620d
MB		 3706 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3707 padoff = sv->op_targ;
3708 iterflags |= OPf_SPECIAL;
3709 op_free(sv);
3710 sv = Nullop;
3711 }
79072805 3712 else
cea2e8a9 3713 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3714 }
3715 else {
54b9620d
MB		 3716#ifdef USE_THREADS
3717 padoff = find_threadsv("_");
3718 iterflags |= OPf_SPECIAL;
3719#else
3280af22 3720 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3721#endif
79072805 3722 }
5f05dabc 3723 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3724 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3725 iterflags |= OPf_STACKED;
3726 }
89ea2908
GA		 3727 else if (expr->op_type == OP_NULL &&
3728 (expr->op_flags & OPf_KIDS) &&
3729 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3730 {
3731 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3732 * set the STACKED flag to indicate that these values are to be
3733 * treated as min/max values by 'pp_iterinit'.
3734 */
3735 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3736 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3737 OP* left = range->op_first;
3738 OP* right = left->op_sibling;
5152d7c7 3739 LISTOP* listop;
89ea2908
GA		 3740
3741 range->op_flags &= ~OPf_KIDS;
3742 range->op_first = Nullop;
3743
5152d7c7 3744 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3745 listop->op_first->op_next = range->op_next;
3746 left->op_next = range->op_other;
5152d7c7
GS		 3747 right->op_next = (OP*)listop;
3748 listop->op_next = listop->op_first;
89ea2908
GA		 3749
3750 op_free(expr);
5152d7c7 3751 expr = (OP*)(listop);
89ea2908
GA		 3752 null(expr);
3753 iterflags |= OPf_STACKED;
3754 }
3755 else {
3756 expr = mod(force_list(expr), OP_GREPSTART);
3757 }
3758
3759
4633a7c4 3760 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3761 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3762 assert(!loop->op_next);
b7dc083c
NIS		 3763#ifdef PL_OP_SLAB_ALLOC
3764 NewOp(1234,tmp,1,LOOP);
3765 Copy(loop,tmp,1,LOOP);
3766 loop = tmp;
3767#else
85e6fe83 3768 Renew(loop, 1, LOOP);
b7dc083c 3769#endif
85e6fe83 3770 loop->op_targ = padoff;
fb73857a 3771 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3772 PL_copline = forline;
fb73857a 3773 return newSTATEOP(0, label, wop);
79072805
LW		 3774}
3775
8990e307 3776OP*
864dbfa3 3777Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3778{
11343788
MB		 3779 dTHR;
3780 OP *o;
2d8e6c8d
GS		 3781 STRLEN n_a;
3782
8990e307 3783 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3784 /* "last()" means "last" */
3785 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3786 o = newOP(type, OPf_SPECIAL);
3787 else {
3788 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3789 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3790 : ""));
3791 }
8990e307
LW		 3792 op_free(label);
3793 }
3794 else {
a0d0e21e
LW		 3795 if (label->op_type == OP_ENTERSUB)
3796 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3797 o = newUNOP(type, OPf_STACKED, label);
8990e307 3798 }
3280af22 3799 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3800 return o;
8990e307
LW		 3801}
3802
79072805 3803void
864dbfa3 3804Perl_cv_undef(pTHX_ CV *cv)
79072805 3805{
11343788
MB		 3806 dTHR;
3807#ifdef USE_THREADS
e858de61
MB		 3808 if (CvMUTEXP(cv)) {
3809 MUTEX_DESTROY(CvMUTEXP(cv));
3810 Safefree(CvMUTEXP(cv));
3811 CvMUTEXP(cv) = 0;
3812 }
11343788
MB		 3813#endif /* USE_THREADS */
3814
a0d0e21e 3815 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3816#ifdef USE_THREADS
3817 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3818 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3819#else
a0d0e21e 3820 if (CvDEPTH(cv))
cea2e8a9 3821 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3822#endif /* USE_THREADS */
8990e307 3823 ENTER;
a0d0e21e 3824
3280af22
NIS		 3825 SAVESPTR(PL_curpad);
3826 PL_curpad = 0;
a0d0e21e 3827
a5f75d66 3828 if (!CvCLONED(cv))
748a9306 3829 op_free(CvROOT(cv));
79072805 3830 CvROOT(cv) = Nullop;
8990e307 3831 LEAVE;
79072805 3832 }
1d5db326 3833 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3834 CvFLAGS(cv) = 0;
8e07c86e
AD		 3835 SvREFCNT_dec(CvGV(cv));
3836 CvGV(cv) = Nullgv;
3837 SvREFCNT_dec(CvOUTSIDE(cv));
3838 CvOUTSIDE(cv) = Nullcv;
3839 if (CvPADLIST(cv)) {
8ebc5c01 3840 /* may be during global destruction */
3841 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3842 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3843 while (i >= 0) {
3844 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3845 SV* sv = svp ? *svp : Nullsv;
3846 if (!sv)
3847 continue;
3280af22
NIS		 3848 if (sv == (SV*)PL_comppad_name)
3849 PL_comppad_name = Nullav;
3850 else if (sv == (SV*)PL_comppad) {
3851 PL_comppad = Nullav;
3852 PL_curpad = Null(SV**);
46fc3d4c 3853 }
3854 SvREFCNT_dec(sv);
8ebc5c01 3855 }
3856 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3857 }
8e07c86e
AD		 3858 CvPADLIST(cv) = Nullav;
3859 }
79072805
LW		 3860}
3861
5f05dabc 3862#ifdef DEBUG_CLOSURES
76e3520e 3863STATIC void
ba106d47 3864cv_dump(CV *cv)
5f05dabc 3865{
3866 CV *outside = CvOUTSIDE(cv);
3867 AV* padlist = CvPADLIST(cv);
4fdae800 3868 AV* pad_name;
3869 AV* pad;
3870 SV** pname;
3871 SV** ppad;
5f05dabc 3872 I32 ix;
3873
b900a521
JH		 3874 PerlIO_printf(Perl_debug_log,
3875 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
3876 PTR2UV(cv),
ab50184a 3877 (CvANON(cv) ? "ANON"
6b88bc9c 3878 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3879 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3880 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 3881 PTR2UV(outside),
ab50184a
CS		 3882 (!outside ? "null"
3883 : CvANON(outside) ? "ANON"
6b88bc9c 3884 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3885 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3886 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3887
4fdae800 3888 if (!padlist)
3889 return;
3890
3891 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3892 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3893 pname = AvARRAY(pad_name);
3894 ppad = AvARRAY(pad);
3895
93965878 3896 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3897 if (SvPOK(pname[ix]))
b900a521
JH		 3898 PerlIO_printf(Perl_debug_log,
3899 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
3900 ix, PTR2UV(ppad[ix]),
4fdae800 3901 SvFAKE(pname[ix]) ? "FAKE " : "",
3902 SvPVX(pname[ix]),
b900a521
JH		 3903 (IV)I_32(SvNVX(pname[ix])),
3904 SvIVX(pname[ix]));
5f05dabc 3905 }
3906}
3907#endif /* DEBUG_CLOSURES */
3908
76e3520e 3909STATIC CV *
cea2e8a9 3910S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 3911{
11343788 3912 dTHR;
748a9306
LW		 3913 AV* av;
3914 I32 ix;
3915 AV* protopadlist = CvPADLIST(proto);
3916 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3917 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3918 SV** pname = AvARRAY(protopad_name);
3919 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3920 I32 fname = AvFILLp(protopad_name);
3921 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3922 AV* comppadlist;
3923 CV* cv;
3924
07055b4c
CS		 3925 assert(!CvUNIQUE(proto));
3926
748a9306 3927 ENTER;
3280af22
NIS		 3928 SAVESPTR(PL_curpad);
3929 SAVESPTR(PL_comppad);
3930 SAVESPTR(PL_comppad_name);
3931 SAVESPTR(PL_compcv);
748a9306 3932
3280af22 3933 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3934 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3935 CvCLONED_on(cv);
5f05dabc 3936 if (CvANON(proto))
3937 CvANON_on(cv);
748a9306 3938
11343788 3939#ifdef USE_THREADS
12ca11f6 3940 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3941 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3942 CvOWNER(cv) = 0;
3943#endif /* USE_THREADS */
44a8e56a 3944 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3945 CvSTASH(cv) = CvSTASH(proto);
3946 CvROOT(cv) = CvROOT(proto);
3947 CvSTART(cv) = CvSTART(proto);
5f05dabc 3948 if (outside)
3949 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3950
68dc0745 3951 if (SvPOK(proto))
3952 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3953
3280af22 3954 PL_comppad_name = newAV();
46fc3d4c 3955 for (ix = fname; ix >= 0; ix--)
3280af22 3956 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3957
3280af22 3958 PL_comppad = newAV();
748a9306
LW		 3959
3960 comppadlist = newAV();
3961 AvREAL_off(comppadlist);
3280af22
NIS		 3962 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3963 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3964 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3965 av_fill(PL_comppad, AvFILLp(protopad));
3966 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3967
3968 av = newAV(); /* will be @_ */
3969 av_extend(av, 0);
3280af22 3970 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3971 AvFLAGS(av) = AVf_REIFY;
3972
9607fc9c 3973 for (ix = fpad; ix > 0; ix--) {
3974 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3975 if (namesv && namesv != &PL_sv_undef) {
aa689395 3976 char *name = SvPVX(namesv); /* XXX */
3977 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3978 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 3979 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 3980 if (!off)
3280af22 3981 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3982 else if (off != ix)
cea2e8a9 3983 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 3984 }
3985 else { /* our own lexical */
aa689395 3986 SV* sv;
5f05dabc 3987 if (*name == '&') {
3988 /* anon code -- we'll come back for it */
3989 sv = SvREFCNT_inc(ppad[ix]);
3990 }
3991 else if (*name == '@')
3992 sv = (SV*)newAV();
748a9306 3993 else if (*name == '%')
5f05dabc 3994 sv = (SV*)newHV();
748a9306 3995 else
5f05dabc 3996 sv = NEWSV(0,0);
3997 if (!SvPADBUSY(sv))
3998 SvPADMY_on(sv);
3280af22 3999 PL_curpad[ix] = sv;
748a9306
LW		 4000 }
4001 }
4002 else {
aa689395 4003 SV* sv = NEWSV(0,0);
748a9306 4004 SvPADTMP_on(sv);
3280af22 4005 PL_curpad[ix] = sv;
748a9306
LW		 4006 }
4007 }
4008
5f05dabc 4009 /* Now that vars are all in place, clone nested closures. */
4010
9607fc9c 4011 for (ix = fpad; ix > 0; ix--) {
4012 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4013 if (namesv
3280af22 4014 && namesv != &PL_sv_undef
aa689395 4015 && !(SvFLAGS(namesv) & SVf_FAKE)
4016 && *SvPVX(namesv) == '&'
5f05dabc 4017 && CvCLONE(ppad[ix]))
4018 {
4019 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4020 SvREFCNT_dec(ppad[ix]);
4021 CvCLONE_on(kid);
4022 SvPADMY_on(kid);
3280af22 4023 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4024 }
4025 }
4026
5f05dabc 4027#ifdef DEBUG_CLOSURES
ab50184a
CS		 4028 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4029 cv_dump(outside);
4030 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4031 cv_dump(proto);
ab50184a 4032 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4033 cv_dump(cv);
4034#endif
4035
748a9306
LW		 4036 LEAVE;
4037 return cv;
4038}
4039
4040CV *
864dbfa3 4041Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4042{
b099ddc0
GS		 4043 CV *cv;
4044 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
4045 cv = cv_clone2(proto, CvOUTSIDE(proto));
4046 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
4047 return cv;
5f05dabc 4048}
4049
3fe9a6f1 4050void
864dbfa3 4051Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4052{
0453d815
PM		 4053 dTHR;
4054
f248d071 4055 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 4056 SV* msg = sv_newmortal();
3fe9a6f1 4057 SV* name = Nullsv;
4058
4059 if (gv)
46fc3d4c 4060 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4061 sv_setpv(msg, "Prototype mismatch:");
4062 if (name)
cea2e8a9 4063 Perl_sv_catpvf(aTHX_ msg, " sub %_", name);
3fe9a6f1 4064 if (SvPOK(cv))
cea2e8a9 4065 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4066 sv_catpv(msg, " vs ");
4067 if (p)
cea2e8a9 4068 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4069 else
4070 sv_catpv(msg, "none");
0453d815 4071 Perl_warner(aTHX_ WARN_UNSAFE, "%_", msg);
3fe9a6f1 4072 }
4073}
4074
760ac839 4075SV *
864dbfa3 4076Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4077{
54310121 4078 if (!cv || !SvPOK(cv) || SvCUR(cv))
4079 return Nullsv;
fe5e78ed
GS		 4080 return op_const_sv(CvSTART(cv), cv);
4081}
760ac839 4082
fe5e78ed 4083SV *
864dbfa3 4084Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4085{
4086 SV *sv = Nullsv;
4087
4088 if(!o)
4089 return Nullsv;
4090
4091 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
4092 o = cLISTOPo->op_first->op_sibling;
4093
4094 for (; o; o = o->op_next) {
54310121 4095 OPCODE type = o->op_type;
fe5e78ed 4096
acb36ea4 4097 if (sv && o->op_next == o)
fe5e78ed 4098 return sv;
54310121 4099 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4100 continue;
4101 if (type == OP_LEAVESUB || type == OP_RETURN)
4102 break;
4103 if (sv)
4104 return Nullsv;
4105 if (type == OP_CONST)
5dc0d613 4106 sv = cSVOPo->op_sv;
fe5e78ed 4107 else if (type == OP_PADSV && cv) {
e858de61
MB		 4108 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4109 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4110 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4111 return Nullsv;
760ac839 4112 }
54310121 4113 else
4114 return Nullsv;
760ac839 4115 }
5aabfad6 4116 if (sv)
4117 SvREADONLY_on(sv);
760ac839
LW		 4118 return sv;
4119}
4120
09bef843
SB		 4121void
4122Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4123{
4124 if (o)
4125 SAVEFREEOP(o);
4126 if (proto)
4127 SAVEFREEOP(proto);
4128 if (attrs)
4129 SAVEFREEOP(attrs);
4130 if (block)
4131 SAVEFREEOP(block);
4132 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4133}
4134
748a9306 4135CV *
864dbfa3 4136Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4137{
09bef843
SB		 4138 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4139}
4140
4141CV *
4142Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4143{
11343788 4144 dTHR;
2d8e6c8d
GS		 4145 STRLEN n_a;
4146 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4 4147 GV *gv = gv_fetchpv(name ? name : "__ANON__",
09bef843
SB		 4148 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4149 SVt_PVCV);
2d8e6c8d 4150 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4151 register CV *cv=0;
a0d0e21e 4152 I32 ix;
79072805 4153
11343788 4154 if (o)
5dc0d613 4155 SAVEFREEOP(o);
3fe9a6f1 4156 if (proto)
4157 SAVEFREEOP(proto);
09bef843
SB		 4158 if (attrs)
4159 SAVEFREEOP(attrs);
3fe9a6f1 4160
09bef843 4161 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4162 maximum a prototype before. */
4163 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4164 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 4165 && ckWARN_d(WARN_UNSAFE))
4166 {
0453d815 4167 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 4168 }
55d729e4
GS		 4169 cv_ckproto((CV*)gv, NULL, ps);
4170 }
4171 if (ps)
4172 sv_setpv((SV*)gv, ps);
4173 else
4174 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4175 SvREFCNT_dec(PL_compcv);
4176 cv = PL_compcv = NULL;
4177 PL_sub_generation++;
55d729e4
GS		 4178 goto noblock;
4179 }
4180
68dc0745 4181 if (!name || GvCVGEN(gv))
4182 cv = Nullcv;
4183 else if (cv = GvCV(gv)) {
3fe9a6f1 4184 cv_ckproto(cv, gv, ps);
68dc0745 4185 /* already defined (or promised)? */
4186 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4187 SV* const_sv;
fe5e78ed 4188 bool const_changed = TRUE;
09bef843 4189 if (!block && !attrs) {
aa689395 4190 /* just a "sub foo;" when &foo is already defined */
3280af22 4191 SAVEFREESV(PL_compcv);
aa689395 4192 goto done;
4193 }
7bac28a0 4194 /* ahem, death to those who redefine active sort subs */
3280af22 4195 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4196 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4197 if (!block)
4198 goto withattrs;
fe5e78ed
GS		 4199 if(const_sv = cv_const_sv(cv))
4200 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 4201 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
4202 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4203 && HvNAME(GvSTASH(CvGV(cv)))
4204 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
4205 "autouse"))) {
3280af22
NIS		 4206 line_t oldline = PL_curcop->cop_line;
4207 PL_curcop->cop_line = PL_copline;
cea2e8a9 4208 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4209 const_sv ? "Constant subroutine %s redefined"
09bef843 4210 : "Subroutine %s redefined", name);
3280af22 4211 PL_curcop->cop_line = oldline;
79072805 4212 }
8990e307 4213 SvREFCNT_dec(cv);
68dc0745 4214 cv = Nullcv;
79072805
LW		 4215 }
4216 }
09bef843
SB		 4217 withattrs:
4218 if (attrs) {
4219 HV *stash;
4220 SV *rcv;
4221
4222 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4223 * before we clobber PL_compcv.
4224 */
4225 if (cv && !block) {
4226 rcv = (SV*)cv;
4227 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4228 stash = GvSTASH(CvGV(cv));
4229 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4230 stash = CvSTASH(cv);
4231 else
4232 stash = PL_curstash;
4233 }
4234 else {
4235 /* possibly about to re-define existing subr -- ignore old cv */
4236 rcv = (SV*)PL_compcv;
4237 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4238 stash = GvSTASH(gv);
4239 else
4240 stash = PL_curstash;
4241 }
4242 apply_attrs(stash, rcv, attrs);
4243 }
a0d0e21e 4244 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4245 if (!block) {
4246 /* got here with just attrs -- work done, so bug out */
4247 SAVEFREESV(PL_compcv);
4248 goto done;
4249 }
4633a7c4 4250 cv_undef(cv);
3280af22
NIS		 4251 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4252 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4253 CvOUTSIDE(PL_compcv) = 0;
4254 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4255 CvPADLIST(PL_compcv) = 0;
4256 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4257 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4258 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4259 }
4260 else {
3280af22 4261 cv = PL_compcv;
44a8e56a 4262 if (name) {
4263 GvCV(gv) = cv;
4264 GvCVGEN(gv) = 0;
3280af22 4265 PL_sub_generation++;
44a8e56a 4266 }
a0d0e21e 4267 }
44a8e56a 4268 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4269 CvSTASH(cv) = PL_curstash;
11343788
MB		 4270#ifdef USE_THREADS
4271 CvOWNER(cv) = 0;
1cfa4ec7 4272 if (!CvMUTEXP(cv)) {
f6aaf501 4273 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4274 MUTEX_INIT(CvMUTEXP(cv));
4275 }
11343788 4276#endif /* USE_THREADS */
8990e307 4277
3fe9a6f1 4278 if (ps)
4279 sv_setpv((SV*)cv, ps);
4633a7c4 4280
3280af22 4281 if (PL_error_count) {
c07a80fd 4282 op_free(block);
4283 block = Nullop;
68dc0745 4284 if (name) {
4285 char *s = strrchr(name, ':');
4286 s = s ? s+1 : name;
6d4c2119
CS		 4287 if (strEQ(s, "BEGIN")) {
4288 char *not_safe =
4289 "BEGIN not safe after errors--compilation aborted";
faef0170 4290 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4291 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4292 else {
4293 /* force display of errors found but not reported */
38a03e6e 4294 sv_catpv(ERRSV, not_safe);
cea2e8a9 4295 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4296 }
4297 }
68dc0745 4298 }
c07a80fd 4299 }
a0d0e21e 4300 if (!block) {
55d729e4 4301 noblock:
3280af22 4302 PL_copline = NOLINE;
a0d0e21e
LW		 4303 LEAVE_SCOPE(floor);
4304 return cv;
4305 }
4306
3280af22
NIS		 4307 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4308 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4309
54310121 4310 if (CvCLONE(cv)) {
3280af22
NIS		 4311 SV **namep = AvARRAY(PL_comppad_name);
4312 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4313 SV *namesv;
4314
3280af22 4315 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4316 continue;
4317 /*
4318 * The only things that a clonable function needs in its
4319 * pad are references to outer lexicals and anonymous subs.
4320 * The rest are created anew during cloning.
4321 */
4322 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4323 namesv != &PL_sv_undef &&
54310121 4324 (SvFAKE(namesv) ||
4325 *SvPVX(namesv) == '&')))
4326 {
3280af22
NIS		 4327 SvREFCNT_dec(PL_curpad[ix]);
4328 PL_curpad[ix] = Nullsv;
54310121 4329 }
4330 }
a0d0e21e 4331 }
54310121 4332 else {
4333 AV *av = newAV(); /* Will be @_ */
4334 av_extend(av, 0);
3280af22 4335 av_store(PL_comppad, 0, (SV*)av);
54310121 4336 AvFLAGS(av) = AVf_REIFY;
79072805 4337
3280af22
NIS		 4338 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4339 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4340 continue;
3280af22
NIS		 4341 if (!SvPADMY(PL_curpad[ix]))
4342 SvPADTMP_on(PL_curpad[ix]);
54310121 4343 }
4344 }
79072805 4345
7934575e 4346 if (CvLVALUE(cv)) {
cd06dffe
GS		 4347 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4348 }
4349 else {
4350 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4351 }
7934575e
GS		 4352 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4353 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4354 CvSTART(cv) = LINKLIST(CvROOT(cv));
4355 CvROOT(cv)->op_next = 0;
4356 peep(CvSTART(cv));
93a17b20 4357
44a8e56a 4358 if (name) {
4359 char *s;
4360
3280af22 4361 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4362 SV *sv = NEWSV(0,0);
44a8e56a 4363 SV *tmpstr = sv_newmortal();
549bb64a 4364 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4365 CV *cv;
4366 HV *hv;
4367
cea2e8a9 4368 Perl_sv_setpvf(aTHX_ sv, "%_:%ld-%ld",
cc49e20b
GS		 4369 CopFILESV(PL_curcop),
4370 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4371 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4372 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4373 hv = GvHVn(db_postponed);
9607fc9c 4374 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4375 && (cv = GvCV(db_postponed))) {
44a8e56a 4376 dSP;
924508f0 4377 PUSHMARK(SP);
44a8e56a 4378 XPUSHs(tmpstr);
4379 PUTBACK;
864dbfa3 4380 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4381 }
4382 }
79072805 4383
44a8e56a 4384 if ((s = strrchr(name,':')))
28757baa 4385 s++;
4386 else
4387 s = name;
68dc0745 4388 if (strEQ(s, "BEGIN")) {
3280af22 4389 I32 oldscope = PL_scopestack_ix;
28757baa 4390 ENTER;
cc49e20b 4391 SAVESPTR(CopFILEGV(&PL_compiling));
3280af22
NIS		 4392 SAVEI16(PL_compiling.cop_line);
4393 save_svref(&PL_rs);
4394 sv_setsv(PL_rs, PL_nrs);
28757baa 4395
3280af22
NIS		 4396 if (!PL_beginav)
4397 PL_beginav = newAV();
28757baa 4398 DEBUG_x( dump_sub(gv) );
3280af22 4399 av_push(PL_beginav, (SV *)cv);
28757baa 4400 GvCV(gv) = 0;
3280af22 4401 call_list(oldscope, PL_beginav);
a6006777 4402
3280af22 4403 PL_curcop = &PL_compiling;
a0ed51b3 4404 PL_compiling.op_private = PL_hints;
28757baa 4405 LEAVE;
4406 }
3280af22
NIS		 4407 else if (strEQ(s, "END") && !PL_error_count) {
4408 if (!PL_endav)
4409 PL_endav = newAV();
4410 av_unshift(PL_endav, 1);
4411 av_store(PL_endav, 0, (SV *)cv);
28757baa 4412 GvCV(gv) = 0;
4413 }
3280af22
NIS		 4414 else if (strEQ(s, "INIT") && !PL_error_count) {
4415 if (!PL_initav)
4416 PL_initav = newAV();
4417 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4418 GvCV(gv) = 0;
ae77835f 4419 }
79072805 4420 }
a6006777 4421
aa689395 4422 done:
3280af22 4423 PL_copline = NOLINE;
8990e307 4424 LEAVE_SCOPE(floor);
a0d0e21e 4425 return cv;
79072805
LW		 4426}
4427
b099ddc0 4428/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4429void
864dbfa3 4430Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4431{
4432 dTHR;
3280af22
NIS		 4433 U32 oldhints = PL_hints;
4434 HV *old_cop_stash = PL_curcop->cop_stash;
4435 HV *old_curstash = PL_curstash;
4436 line_t oldline = PL_curcop->cop_line;
4437 PL_curcop->cop_line = PL_copline;
5476c433 4438
3280af22 4439 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4440 if(stash)
3280af22 4441 PL_curstash = PL_curcop->cop_stash = stash;
5476c433 4442
09bef843 4443 newATTRSUB(
be24f278 4444 start_subparse(FALSE, 0),
5476c433 4445 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4446 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4447 Nullop,
5476c433
JD		 4448 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4449 );
4450
3280af22
NIS		 4451 PL_hints = oldhints;
4452 PL_curcop->cop_stash = old_cop_stash;
4453 PL_curstash = old_curstash;
4454 PL_curcop->cop_line = oldline;
5476c433
JD		 4455}
4456
57d3b86d 4457CV *
864dbfa3 4458Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4459{
11343788 4460 dTHR;
44a8e56a 4461 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4462 register CV *cv;
44a8e56a 4463
4464 if (cv = (name ? GvCV(gv) : Nullcv)) {
4465 if (GvCVGEN(gv)) {
4466 /* just a cached method */
4467 SvREFCNT_dec(cv);
4468 cv = 0;
4469 }
4470 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4471 /* already defined (or promised) */
599cee73 4472 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4473 && HvNAME(GvSTASH(CvGV(cv)))
4474 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4475 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4476 if (PL_copline != NOLINE)
4477 PL_curcop->cop_line = PL_copline;
cea2e8a9 4478 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4479 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4480 }
4481 SvREFCNT_dec(cv);
4482 cv = 0;
79072805 4483 }
79072805 4484 }
44a8e56a 4485
4486 if (cv) /* must reuse cv if autoloaded */
4487 cv_undef(cv);
a0d0e21e
LW		 4488 else {
4489 cv = (CV*)NEWSV(1105,0);
4490 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4491 if (name) {
4492 GvCV(gv) = cv;
4493 GvCVGEN(gv) = 0;
3280af22 4494 PL_sub_generation++;
44a8e56a 4495 }
a0d0e21e 4496 }
5196be3e 4497 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4498#ifdef USE_THREADS
12ca11f6 4499 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4500 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4501 CvOWNER(cv) = 0;
4502#endif /* USE_THREADS */
b195d487 4503 (void)gv_fetchfile(filename);
a0d0e21e 4504 CvXSUB(cv) = subaddr;
44a8e56a 4505
28757baa 4506 if (name) {
4507 char *s = strrchr(name,':');
4508 if (s)
4509 s++;
4510 else
4511 s = name;
4512 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4513 if (!PL_beginav)
4514 PL_beginav = newAV();
4515 av_push(PL_beginav, (SV *)cv);
44a8e56a 4516 GvCV(gv) = 0;
28757baa 4517 }
4518 else if (strEQ(s, "END")) {
3280af22
NIS		 4519 if (!PL_endav)
4520 PL_endav = newAV();
4521 av_unshift(PL_endav, 1);
4522 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4523 GvCV(gv) = 0;
28757baa 4524 }
7d07dbc2 4525 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4526 if (!PL_initav)
4527 PL_initav = newAV();
4528 av_push(PL_initav, (SV *)cv);
f8f842e4 4529 GvCV(gv) = 0;
ae77835f 4530 }
28757baa 4531 }
8990e307 4532 else
a5f75d66 4533 CvANON_on(cv);
44a8e56a 4534
a0d0e21e 4535 return cv;
79072805
LW		 4536}
4537
4538void
864dbfa3 4539Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4540{
11343788 4541 dTHR;
79072805
LW		 4542 register CV *cv;
4543 char *name;
4544 GV *gv;
a0d0e21e 4545 I32 ix;
2d8e6c8d 4546 STRLEN n_a;
79072805 4547
11343788 4548 if (o)
2d8e6c8d 4549 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4550 else
4551 name = "STDOUT";
85e6fe83 4552 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4553 GvMULTI_on(gv);
79072805 4554 if (cv = GvFORM(gv)) {
599cee73 4555 if (ckWARN(WARN_REDEFINE)) {
3280af22 4556 line_t oldline = PL_curcop->cop_line;
79072805 4557
3280af22 4558 PL_curcop->cop_line = PL_copline;
cea2e8a9 4559 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
3280af22 4560 PL_curcop->cop_line = oldline;
79072805 4561 }
8990e307 4562 SvREFCNT_dec(cv);
79072805 4563 }
3280af22 4564 cv = PL_compcv;
79072805 4565 GvFORM(gv) = cv;
44a8e56a 4566 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 4567
3280af22
NIS		 4568 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4569 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4570 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4571 }
4572
79072805 4573 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4574 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4575 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4576 CvSTART(cv) = LINKLIST(CvROOT(cv));
4577 CvROOT(cv)->op_next = 0;
4578 peep(CvSTART(cv));
11343788 4579 op_free(o);
3280af22 4580 PL_copline = NOLINE;
8990e307 4581 LEAVE_SCOPE(floor);
79072805
LW		 4582}
4583
4584OP *
864dbfa3 4585Perl_newANONLIST(pTHX_ OP *o)
79072805 4586{
93a17b20 4587 return newUNOP(OP_REFGEN, 0,
11343788 4588 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4589}
4590
4591OP *
864dbfa3 4592Perl_newANONHASH(pTHX_ OP *o)
79072805 4593{
93a17b20 4594 return newUNOP(OP_REFGEN, 0,
11343788 4595 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4596}
4597
4598OP *
864dbfa3 4599Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4600{
09bef843
SB		 4601 return newANONATTRSUB(floor, proto, Nullop, block);
4602}
4603
4604OP *
4605Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4606{
a0d0e21e 4607 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4608 newSVOP(OP_ANONCODE, 0,
4609 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4610}
4611
4612OP *
864dbfa3 4613Perl_oopsAV(pTHX_ OP *o)
79072805 4614{
ed6116ce
LW		 4615 switch (o->op_type) {
4616 case OP_PADSV:
4617 o->op_type = OP_PADAV;
22c35a8c 4618 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4619 return ref(o, OP_RV2AV);
ed6116ce
LW		 4620
4621 case OP_RV2SV:
79072805 4622 o->op_type = OP_RV2AV;
22c35a8c 4623 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4624 ref(o, OP_RV2AV);
ed6116ce
LW		 4625 break;
4626
4627 default:
0453d815
PM		 4628 if (ckWARN_d(WARN_INTERNAL))
4629 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4630 break;
4631 }
79072805
LW		 4632 return o;
4633}
4634
4635OP *
864dbfa3 4636Perl_oopsHV(pTHX_ OP *o)
79072805 4637{
0453d815 4638 dTHR;
0453d815 4639
ed6116ce
LW		 4640 switch (o->op_type) {
4641 case OP_PADSV:
4642 case OP_PADAV:
4643 o->op_type = OP_PADHV;
22c35a8c 4644 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4645 return ref(o, OP_RV2HV);
ed6116ce
LW		 4646
4647 case OP_RV2SV:
4648 case OP_RV2AV:
79072805 4649 o->op_type = OP_RV2HV;
22c35a8c 4650 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4651 ref(o, OP_RV2HV);
ed6116ce
LW		 4652 break;
4653
4654 default:
0453d815
PM		 4655 if (ckWARN_d(WARN_INTERNAL))
4656 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4657 break;
4658 }
79072805
LW		 4659 return o;
4660}
4661
4662OP *
864dbfa3 4663Perl_newAVREF(pTHX_ OP *o)
79072805 4664{
ed6116ce
LW		 4665 if (o->op_type == OP_PADANY) {
4666 o->op_type = OP_PADAV;
22c35a8c 4667 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4668 return o;
ed6116ce 4669 }
79072805
LW		 4670 return newUNOP(OP_RV2AV, 0, scalar(o));
4671}
4672
4673OP *
864dbfa3 4674Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4675{
82092f1d 4676 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4677 return newUNOP(OP_NULL, 0, o);
748a9306 4678 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4679}
4680
4681OP *
864dbfa3 4682Perl_newHVREF(pTHX_ OP *o)
79072805 4683{
ed6116ce
LW		 4684 if (o->op_type == OP_PADANY) {
4685 o->op_type = OP_PADHV;
22c35a8c 4686 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4687 return o;
ed6116ce 4688 }
79072805
LW		 4689 return newUNOP(OP_RV2HV, 0, scalar(o));
4690}
4691
4692OP *
864dbfa3 4693Perl_oopsCV(pTHX_ OP *o)
79072805 4694{
cea2e8a9 4695 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4696 /* STUB */
4697 return o;
4698}
4699
4700OP *
864dbfa3 4701Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4702{
c07a80fd 4703 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4704}
4705
4706OP *
864dbfa3 4707Perl_newSVREF(pTHX_ OP *o)
79072805 4708{
ed6116ce
LW		 4709 if (o->op_type == OP_PADANY) {
4710 o->op_type = OP_PADSV;
22c35a8c 4711 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4712 return o;
ed6116ce 4713 }
224a4551
MB		 4714 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4715 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4716 return o;
224a4551 4717 }
79072805
LW		 4718 return newUNOP(OP_RV2SV, 0, scalar(o));
4719}
4720
4721/* Check routines. */
4722
4723OP *
cea2e8a9 4724Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4725{
178c6305
CS		 4726 PADOFFSET ix;
4727 SV* name;
4728
4729 name = NEWSV(1106,0);
4730 sv_upgrade(name, SVt_PVNV);
4731 sv_setpvn(name, "&", 1);
4732 SvIVX(name) = -1;
4733 SvNVX(name) = 1;
5dc0d613 4734 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4735 av_store(PL_comppad_name, ix, name);
4736 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4737 SvPADMY_on(cSVOPo->op_sv);
4738 cSVOPo->op_sv = Nullsv;
4739 cSVOPo->op_targ = ix;
4740 return o;
5f05dabc 4741}
4742
4743OP *
cea2e8a9 4744Perl_ck_bitop(pTHX_ OP *o)
55497cff 4745{
3280af22 4746 o->op_private = PL_hints;
5dc0d613 4747 return o;
55497cff 4748}
4749
4750OP *
cea2e8a9 4751Perl_ck_concat(pTHX_ OP *o)
79072805 4752{
11343788
MB		 4753 if (cUNOPo->op_first->op_type == OP_CONCAT)
4754 o->op_flags |= OPf_STACKED;
4755 return o;
79072805
LW		 4756}
4757
4758OP *
cea2e8a9 4759Perl_ck_spair(pTHX_ OP *o)
79072805 4760{
11343788 4761 if (o->op_flags & OPf_KIDS) {
79072805 4762 OP* newop;
a0d0e21e 4763 OP* kid;
5dc0d613
MB		 4764 OPCODE type = o->op_type;
4765 o = modkids(ck_fun(o), type);
11343788 4766 kid = cUNOPo->op_first;
a0d0e21e
LW		 4767 newop = kUNOP->op_first->op_sibling;
4768 if (newop &&
4769 (newop->op_sibling ||
22c35a8c 4770 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4771 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4772 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4773
11343788 4774 return o;
a0d0e21e
LW		 4775 }
4776 op_free(kUNOP->op_first);
4777 kUNOP->op_first = newop;
4778 }
22c35a8c 4779 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4780 return ck_fun(o);
a0d0e21e
LW		 4781}
4782
4783OP *
cea2e8a9 4784Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4785{
11343788 4786 o = ck_fun(o);
5dc0d613 4787 o->op_private = 0;
11343788
MB		 4788 if (o->op_flags & OPf_KIDS) {
4789 OP *kid = cUNOPo->op_first;
5f05dabc 4790 if (kid->op_type == OP_HSLICE)
5dc0d613 4791 o->op_private |= OPpSLICE;
5f05dabc 4792 else if (kid->op_type != OP_HELEM)
cea2e8a9 4793 Perl_croak(aTHX_ "%s argument is not a HASH element or slice",
22c35a8c 4794 PL_op_desc[o->op_type]);
a0d0e21e 4795 null(kid);
79072805 4796 }
11343788 4797 return o;
79072805
LW		 4798}
4799
4800OP *
cea2e8a9 4801Perl_ck_eof(pTHX_ OP *o)
79072805 4802{
11343788 4803 I32 type = o->op_type;
79072805 4804
11343788
MB		 4805 if (o->op_flags & OPf_KIDS) {
4806 if (cLISTOPo->op_first->op_type == OP_STUB) {
4807 op_free(o);
4808 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4809 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4810 }
11343788 4811 return ck_fun(o);
79072805 4812 }
11343788 4813 return o;
79072805
LW		 4814}
4815
4816OP *
cea2e8a9 4817Perl_ck_eval(pTHX_ OP *o)
79072805 4818{
3280af22 4819 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4820 if (o->op_flags & OPf_KIDS) {
4821 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4822
93a17b20 4823 if (!kid) {
11343788
MB		 4824 o->op_flags &= ~OPf_KIDS;
4825 null(o);
79072805
LW		 4826 }
4827 else if (kid->op_type == OP_LINESEQ) {
4828 LOGOP *enter;
4829
11343788
MB		 4830 kid->op_next = o->op_next;
4831 cUNOPo->op_first = 0;
4832 op_free(o);
79072805 4833
b7dc083c 4834 NewOp(1101, enter, 1, LOGOP);
79072805 4835 enter->op_type = OP_ENTERTRY;
22c35a8c 4836 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4837 enter->op_private = 0;
4838
4839 /* establish postfix order */
4840 enter->op_next = (OP*)enter;
4841
11343788
MB		 4842 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4843 o->op_type = OP_LEAVETRY;
22c35a8c 4844 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4845 enter->op_other = o;
4846 return o;
79072805 4847 }
c7cc6f1c 4848 else
473986ff 4849 scalar((OP*)kid);
79072805
LW		 4850 }
4851 else {
11343788 4852 op_free(o);
54b9620d 4853 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4854 }
3280af22 4855 o->op_targ = (PADOFFSET)PL_hints;
11343788 4856 return o;
79072805
LW		 4857}
4858
4859OP *
cea2e8a9 4860Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 4861{
4862 OP *kid;
11343788
MB		 4863 if (o->op_flags & OPf_STACKED) {
4864 o = ck_fun(o);
4865 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4866 if (kid->op_type == OP_RV2GV)
4867 null(kid);
79072805 4868 }
463ee0b2 4869 else
11343788
MB		 4870 o = listkids(o);
4871 return o;
79072805
LW		 4872}
4873
4874OP *
cea2e8a9 4875Perl_ck_exists(pTHX_ OP *o)
5f05dabc 4876{
5196be3e
MB		 4877 o = ck_fun(o);
4878 if (o->op_flags & OPf_KIDS) {
4879 OP *kid = cUNOPo->op_first;
5f05dabc 4880 if (kid->op_type != OP_HELEM)
cea2e8a9 4881 Perl_croak(aTHX_ "%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4882 null(kid);
4883 }
5196be3e 4884 return o;
5f05dabc 4885}
4886
22c35a8c 4887#if 0
5f05dabc 4888OP *
cea2e8a9 4889Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 4890{
4891 o = fold_constants(o);
4892 if (o->op_type == OP_CONST)
4893 o->op_type = OP_GV;
4894 return o;
4895}
22c35a8c 4896#endif
79072805
LW		 4897
4898OP *
cea2e8a9 4899Perl_ck_rvconst(pTHX_ register OP *o)
79072805 4900{
11343788
MB		 4901 dTHR;
4902 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4903
3280af22 4904 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4905 if (kid->op_type == OP_CONST) {
44a8e56a 4906 char *name;
4907 int iscv;
4908 GV *gv;
779c5bc9 4909 SV *kidsv = kid->op_sv;
2d8e6c8d 4910 STRLEN n_a;
44a8e56a 4911
779c5bc9
GS		 4912 /* Is it a constant from cv_const_sv()? */
4913 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4914 SV *rsv = SvRV(kidsv);
4915 int svtype = SvTYPE(rsv);
4916 char *badtype = Nullch;
4917
4918 switch (o->op_type) {
4919 case OP_RV2SV:
4920 if (svtype > SVt_PVMG)
4921 badtype = "a SCALAR";
4922 break;
4923 case OP_RV2AV:
4924 if (svtype != SVt_PVAV)
4925 badtype = "an ARRAY";
4926 break;
4927 case OP_RV2HV:
4928 if (svtype != SVt_PVHV) {
4929 if (svtype == SVt_PVAV) { /* pseudohash? */
4930 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4931 if (ksv && SvROK(*ksv)
4932 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4933 {
4934 break;
4935 }
4936 }
4937 badtype = "a HASH";
4938 }
4939 break;
4940 case OP_RV2CV:
4941 if (svtype != SVt_PVCV)
4942 badtype = "a CODE";
4943 break;
4944 }
4945 if (badtype)
cea2e8a9 4946 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 4947 return o;
4948 }
2d8e6c8d 4949 name = SvPV(kidsv, n_a);
3280af22 4950 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4951 char *badthing = Nullch;
5dc0d613 4952 switch (o->op_type) {
44a8e56a 4953 case OP_RV2SV:
4954 badthing = "a SCALAR";
4955 break;
4956 case OP_RV2AV:
4957 badthing = "an ARRAY";
4958 break;
4959 case OP_RV2HV:
4960 badthing = "a HASH";
4961 break;
4962 }
4963 if (badthing)
cea2e8a9 4964 Perl_croak(aTHX_
44a8e56a 4965 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4966 name, badthing);
4967 }
93233ece
CS		 4968 /*
4969 * This is a little tricky. We only want to add the symbol if we
4970 * didn't add it in the lexer. Otherwise we get duplicate strict
4971 * warnings. But if we didn't add it in the lexer, we must at
4972 * least pretend like we wanted to add it even if it existed before,
4973 * or we get possible typo warnings. OPpCONST_ENTERED says
4974 * whether the lexer already added THIS instance of this symbol.
4975 */
5196be3e 4976 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4977 do {
44a8e56a 4978 gv = gv_fetchpv(name,
748a9306 4979 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4980 iscv
4981 ? SVt_PVCV
11343788 4982 : o->op_type == OP_RV2SV
a0d0e21e 4983 ? SVt_PV
11343788 4984 : o->op_type == OP_RV2AV
a0d0e21e 4985 ? SVt_PVAV
11343788 4986 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4987 ? SVt_PVHV
4988 : SVt_PVGV);
93233ece
CS		 4989 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4990 if (gv) {
4991 kid->op_type = OP_GV;
4992 SvREFCNT_dec(kid->op_sv);
4993 kid->op_sv = SvREFCNT_inc(gv);
76cd736e 4994 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 4995 }
79072805 4996 }
11343788 4997 return o;
79072805
LW		 4998}
4999
5000OP *
cea2e8a9 5001Perl_ck_ftst(pTHX_ OP *o)
79072805 5002{
11343788
MB		 5003 dTHR;
5004 I32 type = o->op_type;
79072805 5005
11343788
MB		 5006 if (o->op_flags & OPf_REF)
5007 return o;
79072805 5008
108ed793 5009 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5010 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5011
5012 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5013 STRLEN n_a;
a0d0e21e 5014 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5015 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5016 op_free(o);
79072805
LW		 5017 return newop;
5018 }
5019 }
5020 else {
11343788 5021 op_free(o);
79072805 5022 if (type == OP_FTTTY)
fb73857a 5023 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5024 SVt_PVIO));
79072805 5025 else
54b9620d 5026 return newUNOP(type, 0, newDEFSVOP());
79072805 5027 }
11343788 5028 return o;
79072805
LW		 5029}
5030
5031OP *
cea2e8a9 5032Perl_ck_fun(pTHX_ OP *o)
79072805 5033{
11343788 5034 dTHR;
79072805
LW		 5035 register OP *kid;
5036 OP **tokid;
5037 OP *sibl;
5038 I32 numargs = 0;
11343788 5039 int type = o->op_type;
22c35a8c 5040 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5041
11343788 5042 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5043 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5044 oa &= ~OA_OPTIONAL;
5045 else
11343788 5046 return no_fh_allowed(o);
79072805
LW		 5047 }
5048
11343788 5049 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5050 STRLEN n_a;
11343788
MB		 5051 tokid = &cLISTOPo->op_first;
5052 kid = cLISTOPo->op_first;
8990e307
LW		 5053 if (kid->op_type == OP_PUSHMARK ||
5054 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
5055 {
79072805
LW		 5056 tokid = &kid->op_sibling;
5057 kid = kid->op_sibling;
5058 }
22c35a8c 5059 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5060 *tokid = kid = newDEFSVOP();
79072805
LW		 5061
5062 while (oa && kid) {
5063 numargs++;
5064 sibl = kid->op_sibling;
5065 switch (oa & 7) {
5066 case OA_SCALAR:
62c18ce2
GS		 5067 /* list seen where single (scalar) arg expected? */
5068 if (numargs == 1 && !(oa >> 4)
5069 && kid->op_type == OP_LIST && type != OP_SCALAR)
5070 {
5071 return too_many_arguments(o,PL_op_desc[type]);
5072 }
79072805
LW		 5073 scalar(kid);
5074 break;
5075 case OA_LIST:
5076 if (oa < 16) {
5077 kid = 0;
5078 continue;
5079 }
5080 else
5081 list(kid);
5082 break;
5083 case OA_AVREF:
5084 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5085 (kid->op_private & OPpCONST_BARE))
5086 {
2d8e6c8d 5087 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5088 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5089 gv_fetchpv(name, TRUE, SVt_PVAV) ));
b9c39e73 5090 if (ckWARN(WARN_SYNTAX))
cf2093f6 5091 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5092 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5093 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5094 op_free(kid);
5095 kid = newop;
5096 kid->op_sibling = sibl;
5097 *tokid = kid;
5098 }
8990e307 5099 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5100 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5101 mod(kid, type);
79072805
LW		 5102 break;
5103 case OA_HVREF:
5104 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5105 (kid->op_private & OPpCONST_BARE))
5106 {
2d8e6c8d 5107 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5108 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5109 gv_fetchpv(name, TRUE, SVt_PVHV) ));
b9c39e73 5110 if (ckWARN(WARN_SYNTAX))
cf2093f6 5111 Perl_warner(aTHX_ WARN_SYNTAX,
57def98f 5112 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5113 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5114 op_free(kid);
5115 kid = newop;
5116 kid->op_sibling = sibl;
5117 *tokid = kid;
5118 }
8990e307 5119 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5120 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5121 mod(kid, type);
79072805
LW		 5122 break;
5123 case OA_CVREF:
5124 {
a0d0e21e 5125 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5126 kid->op_sibling = 0;
5127 linklist(kid);
5128 newop->op_next = newop;
5129 kid = newop;
5130 kid->op_sibling = sibl;
5131 *tokid = kid;
5132 }
5133 break;
5134 case OA_FILEREF:
c340be78 5135 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5136 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5137 (kid->op_private & OPpCONST_BARE))
5138 {
79072805 5139 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5140 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5141 SVt_PVIO) );
79072805
LW		 5142 op_free(kid);
5143 kid = newop;
5144 }
1ea32a52
GS		 5145 else if (kid->op_type == OP_READLINE) {
5146 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5147 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5148 }
79072805 5149 else {
35cd451c 5150 I32 flags = OPf_SPECIAL;
a6c40364 5151 I32 priv = 0;
35cd451c 5152 /* is this op a FH constructor? */
853846ea 5153 if (is_handle_constructor(o,numargs)) {
1d8d4d2a 5154 flags = 0;
853846ea
NIS		 5155 /* Set a flag to tell rv2gv to vivify
5156 * need to "prove" flag does not mean something
5157 * else already - NI-S 1999/05/07
5158 */
a6c40364 5159 priv = OPpDEREF;
1d8d4d2a
NIS		 5160#if 0
5161 /* Helps with open($array[$n],...)
5162 but is too simplistic - need to do selectively
5163 */
5164 mod(kid,type);
5165#endif
853846ea 5166 }
79072805 5167 kid->op_sibling = 0;
35cd451c 5168 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
a6c40364
GS		 5169 if (priv) {
5170 kid->op_private |= priv;
1d8d4d2a 5171 }
79072805
LW		 5172 }
5173 kid->op_sibling = sibl;
5174 *tokid = kid;
5175 }
5176 scalar(kid);
5177 break;
5178 case OA_SCALARREF:
a0d0e21e 5179 mod(scalar(kid), type);
79072805
LW		 5180 break;
5181 }
5182 oa >>= 4;
5183 tokid = &kid->op_sibling;
5184 kid = kid->op_sibling;
5185 }
11343788 5186 o->op_private |= numargs;
79072805 5187 if (kid)
22c35a8c 5188 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5189 listkids(o);
79072805 5190 }
22c35a8c 5191 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5192 op_free(o);
54b9620d 5193 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5194 }
5195
79072805
LW		 5196 if (oa) {
5197 while (oa & OA_OPTIONAL)
5198 oa >>= 4;
5199 if (oa && oa != OA_LIST)
22c35a8c 5200 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5201 }
11343788 5202 return o;
79072805
LW		 5203}
5204
5205OP *
cea2e8a9 5206Perl_ck_glob(pTHX_ OP *o)
79072805 5207{
fb73857a 5208 GV *gv;
5209
1f2bfc8a 5210 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5211 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5212
5213 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5214 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5215
a7089531 5216#if defined(PERL_INTERNAL_GLOB) && !defined(MINIPERL_BUILD)
72b16652
GS		 5217 /* XXX this can be tightened up and made more failsafe. */
5218 if (!gv) {
5219 OP *modname = newSVOP(OP_CONST, 0, newSVpvn("File::Glob", 10));
5220 modname->op_private |= OPpCONST_BARE;
5221 ENTER;
5222 utilize(1, start_subparse(FALSE, 0), Nullop, modname,
5223 newSVOP(OP_CONST, 0, newSVpvn("globally", 8)));
5224 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5225 LEAVE;
5226 }
a7089531 5227#endif /* PERL_INTERNAL_GLOB && !MINIPERL_BUILD */
72b16652 5228
b1cb66bf 5229 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5230 append_elem(OP_GLOB, o,
80252599 5231 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5232 o->op_type = OP_LIST;
22c35a8c 5233 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5234 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5235 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5236 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5237 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5238 scalar(newUNOP(OP_RV2CV, 0,
5239 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5240 o = newUNOP(OP_NULL, 0, ck_subr(o));
5241 o->op_targ = OP_GLOB; /* hint at what it used to be */
5242 return o;
b1cb66bf 5243 }
5244 gv = newGVgen("main");
a0d0e21e 5245 gv_IOadd(gv);
11343788
MB		 5246 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5247 scalarkids(o);
5248 return ck_fun(o);
79072805
LW		 5249}
5250
5251OP *
cea2e8a9 5252Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5253{
5254 LOGOP *gwop;
5255 OP *kid;
11343788 5256 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5257
22c35a8c 5258 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5259 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5260
11343788 5261 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5262 OP* k;
11343788
MB		 5263 o = ck_sort(o);
5264 kid = cLISTOPo->op_first->op_sibling;
5265 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5266 kid = k;
5267 }
5268 kid->op_next = (OP*)gwop;
11343788 5269 o->op_flags &= ~OPf_STACKED;
93a17b20 5270 }
11343788 5271 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5272 if (type == OP_MAPWHILE)
5273 list(kid);
5274 else
5275 scalar(kid);
11343788 5276 o = ck_fun(o);
3280af22 5277 if (PL_error_count)
11343788 5278 return o;
aeea060c 5279 kid = cLISTOPo->op_first->op_sibling;
79072805 5280 if (kid->op_type != OP_NULL)
cea2e8a9 5281 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5282 kid = kUNOP->op_first;
5283
a0d0e21e 5284 gwop->op_type = type;
22c35a8c 5285 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5286 gwop->op_first = listkids(o);
79072805
LW		 5287 gwop->op_flags |= OPf_KIDS;
5288 gwop->op_private = 1;
5289 gwop->op_other = LINKLIST(kid);
a0d0e21e 5290 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5291 kid->op_next = (OP*)gwop;
5292
11343788 5293 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5294 if (!kid || !kid->op_sibling)
22c35a8c 5295 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5296 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5297 mod(kid, OP_GREPSTART);
5298
79072805
LW		 5299 return (OP*)gwop;
5300}
5301
5302OP *
cea2e8a9 5303Perl_ck_index(pTHX_ OP *o)
79072805 5304{
11343788
MB		 5305 if (o->op_flags & OPf_KIDS) {
5306 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5307 if (kid)
5308 kid = kid->op_sibling; /* get past "big" */
79072805 5309 if (kid && kid->op_type == OP_CONST)
2779dcf1 5310 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5311 }
11343788 5312 return ck_fun(o);
79072805
LW		 5313}
5314
5315OP *
cea2e8a9 5316Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5317{
5318 /* XXX length optimization goes here */
11343788 5319 return ck_fun(o);
79072805
LW		 5320}
5321
5322OP *
cea2e8a9 5323Perl_ck_lfun(pTHX_ OP *o)
79072805 5324{
5dc0d613
MB		 5325 OPCODE type = o->op_type;
5326 return modkids(ck_fun(o), type);
79072805
LW		 5327}
5328
5329OP *
cea2e8a9 5330Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5331{
20ce7b12 5332 dTHR;
d0334bed
GS		 5333 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5334 switch (cUNOPo->op_first->op_type) {
5335 case OP_RV2AV:
7e291ef1 5336 break; /* Globals via GV can be undef */
d0334bed
GS		 5337 case OP_PADAV:
5338 case OP_AASSIGN: /* Is this a good idea? */
5339 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5340 "defined(@array) is deprecated");
d0334bed
GS		 5341 Perl_warner(aTHX_ WARN_DEPRECATED,
5342 "(Maybe you should just omit the defined()?)\n");
69794302 5343 break;
d0334bed 5344 case OP_RV2HV:
7e291ef1 5345 break; /* Globals via GV can be undef */
d0334bed
GS		 5346 case OP_PADHV:
5347 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5348 "defined(%hash) is deprecated");
d0334bed
GS		 5349 Perl_warner(aTHX_ WARN_DEPRECATED,
5350 "(Maybe you should just omit the defined()?)\n");
5351 break;
5352 default:
5353 /* no warning */
5354 break;
5355 }
69794302
MJD		 5356 }
5357 return ck_rfun(o);
5358}
5359
5360OP *
cea2e8a9 5361Perl_ck_rfun(pTHX_ OP *o)
8990e307 5362{
5dc0d613
MB		 5363 OPCODE type = o->op_type;
5364 return refkids(ck_fun(o), type);
8990e307
LW		 5365}
5366
5367OP *
cea2e8a9 5368Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5369{
5370 register OP *kid;
aeea060c 5371
11343788 5372 kid = cLISTOPo->op_first;
79072805 5373 if (!kid) {
11343788
MB		 5374 o = force_list(o);
5375 kid = cLISTOPo->op_first;
79072805
LW		 5376 }
5377 if (kid->op_type == OP_PUSHMARK)
5378 kid = kid->op_sibling;
11343788 5379 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5380 kid = kid->op_sibling;
5381 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5382 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5383 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5384 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5385 cLISTOPo->op_first->op_sibling = kid;
5386 cLISTOPo->op_last = kid;
79072805
LW		 5387 kid = kid->op_sibling;
5388 }
5389 }
5390
5391 if (!kid)
54b9620d 5392 append_elem(o->op_type, o, newDEFSVOP());
79072805 5393
5dc0d613 5394 o = listkids(o);
bbce6d69 5395
5dc0d613 5396 o->op_private = 0;
36477c24 5397#ifdef USE_LOCALE
3280af22 5398 if (PL_hints & HINT_LOCALE)
5dc0d613 5399 o->op_private |= OPpLOCALE;
bbce6d69 5400#endif
5401
5dc0d613 5402 return o;
bbce6d69 5403}
5404
5405OP *
cea2e8a9 5406Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5407{
5dc0d613 5408 o = ck_fun(o);
bbce6d69 5409
5dc0d613 5410 o->op_private = 0;
36477c24 5411#ifdef USE_LOCALE
3280af22 5412 if (PL_hints & HINT_LOCALE)
5dc0d613 5413 o->op_private |= OPpLOCALE;
bbce6d69 5414#endif
5415
5dc0d613 5416 return o;
bbce6d69 5417}
5418
5419OP *
b162f9ea
IZ		 5420Perl_ck_sassign(pTHX_ OP *o)
5421{
5422 OP *kid = cLISTOPo->op_first;
5423 /* has a disposable target? */
5424 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5425 && !(kid->op_flags & OPf_STACKED))
5426 {
5427 OP *kkid = kid->op_sibling;
5428
5429 /* Can just relocate the target. */
2c2d71f5
JH		 5430 if (kkid && kkid->op_type == OP_PADSV
5431 && !(kkid->op_private & OPpLVAL_INTRO))
5432 {
b162f9ea 5433 /* Concat has problems if target is equal to right arg. */
3dbf192b
IZ		 5434 if (kid->op_type == OP_CONCAT) {
5435 if (kLISTOP->op_first->op_sibling->op_type == OP_PADSV
5436 && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
5437 return o;
b162f9ea 5438 }
3dbf192b
IZ		 5439 else if (kid->op_type == OP_JOIN) {
5440 /* do_join has problems if the arguments coincide with target.
c212fd85
IZ		 5441 In fact the second argument *can* safely coincide,
5442 but ignore=pessimize this rare occasion. */
5443 OP *arg = kLISTOP->op_first->op_sibling; /* Skip PUSHMARK */
5444
5445 while (arg) {
5446 if (arg->op_type == OP_PADSV
5447 && arg->op_targ == kkid->op_targ)
5448 return o;
5449 arg = arg->op_sibling;
5450 }
5451 }
3dbf192b
IZ		 5452 else if (kid->op_type == OP_QUOTEMETA) {
5453 /* quotemeta has problems if the argument coincides with target. */
5454 if (kLISTOP->op_first->op_type == OP_PADSV
5455 && kLISTOP->op_first->op_targ == kkid->op_targ)
5456 return o;
5457 }
b162f9ea
IZ		 5458 kid->op_targ = kkid->op_targ;
5459 /* Now we do not need PADSV and SASSIGN. */
5460 kid->op_sibling = o->op_sibling; /* NULL */
5461 cLISTOPo->op_first = NULL;
5462 op_free(o);
5463 op_free(kkid);
5464 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5465 return kid;
5466 }
5467 }
5468 return o;
5469}
5470
5471OP *
cea2e8a9 5472Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5473{
5dc0d613 5474 o->op_private = 0;
36477c24 5475#ifdef USE_LOCALE
3280af22 5476 if (PL_hints & HINT_LOCALE)
5dc0d613 5477 o->op_private |= OPpLOCALE;
bbce6d69 5478#endif
36477c24 5479
5dc0d613 5480 return o;
79072805
LW		 5481}
5482
5483OP *
cea2e8a9 5484Perl_ck_match(pTHX_ OP *o)
79072805 5485{
5dc0d613 5486 o->op_private |= OPpRUNTIME;
11343788 5487 return o;
79072805
LW		 5488}
5489
5490OP *
f5d5a27c
CS		 5491Perl_ck_method(pTHX_ OP *o)
5492{
5493 OP *kid = cUNOPo->op_first;
5494 if (kid->op_type == OP_CONST) {
5495 SV* sv = kSVOP->op_sv;
5496 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5497 OP *cmop;
5498 sv_upgrade(sv, SVt_PVIV);
5499 SvIOK_on(sv);
5500 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5501 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5502 kSVOP->op_sv = Nullsv;
5503 op_free(o);
5504 return cmop;
5505 }
5506 }
5507 return o;
5508}
5509
5510OP *
cea2e8a9 5511Perl_ck_null(pTHX_ OP *o)
79072805 5512{
11343788 5513 return o;
79072805
LW		 5514}
5515
5516OP *
cea2e8a9 5517Perl_ck_repeat(pTHX_ OP *o)
79072805 5518{
11343788
MB		 5519 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5520 o->op_private |= OPpREPEAT_DOLIST;
5521 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5522 }
5523 else
11343788
MB		 5524 scalar(o);
5525 return o;
79072805
LW		 5526}
5527
5528OP *
cea2e8a9 5529Perl_ck_require(pTHX_ OP *o)
8990e307 5530{
11343788
MB		 5531 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5532 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5533
5534 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5535 char *s;
a0d0e21e
LW		 5536 for (s = SvPVX(kid->op_sv); *s; s++) {
5537 if (*s == ':' && s[1] == ':') {
5538 *s = '/';
1aef975c 5539 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5540 --SvCUR(kid->op_sv);
5541 }
8990e307 5542 }
a0d0e21e 5543 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5544 }
5545 }
11343788 5546 return ck_fun(o);
8990e307
LW		 5547}
5548
22c35a8c 5549#if 0
8990e307 5550OP *
cea2e8a9 5551Perl_ck_retarget(pTHX_ OP *o)
79072805 5552{
cea2e8a9 5553 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5554 /* STUB */
11343788 5555 return o;
79072805 5556}
22c35a8c 5557#endif
79072805
LW		 5558
5559OP *
cea2e8a9 5560Perl_ck_select(pTHX_ OP *o)
79072805 5561{
c07a80fd 5562 OP* kid;
11343788
MB		 5563 if (o->op_flags & OPf_KIDS) {
5564 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5565 if (kid && kid->op_sibling) {
11343788 5566 o->op_type = OP_SSELECT;
22c35a8c 5567 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5568 o = ck_fun(o);
5569 return fold_constants(o);
79072805
LW		 5570 }
5571 }
11343788
MB		 5572 o = ck_fun(o);
5573 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5574 if (kid && kid->op_type == OP_RV2GV)
5575 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5576 return o;
79072805
LW		 5577}
5578
5579OP *
cea2e8a9 5580Perl_ck_shift(pTHX_ OP *o)
79072805 5581{
11343788 5582 I32 type = o->op_type;
79072805 5583
11343788 5584 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5585 OP *argop;
5586
11343788 5587 op_free(o);
6d4ff0d2 5588#ifdef USE_THREADS
533c011a 5589 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5590 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5591 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5592 }
5593 else {
5594 argop = newUNOP(OP_RV2AV, 0,
5595 scalar(newGVOP(OP_GV, 0,
5596 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5597 }
5598#else
5599 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5600 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5601 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5602#endif /* USE_THREADS */
5603 return newUNOP(type, 0, scalar(argop));
79072805 5604 }
11343788 5605 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5606}
5607
5608OP *
cea2e8a9 5609Perl_ck_sort(pTHX_ OP *o)
79072805 5610{
5dc0d613 5611 o->op_private = 0;
36477c24 5612#ifdef USE_LOCALE
3280af22 5613 if (PL_hints & HINT_LOCALE)
5dc0d613 5614 o->op_private |= OPpLOCALE;
bbce6d69 5615#endif
5616
9ea6e965 5617 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5618 simplify_sort(o);
9c007264 5619 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5620 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5621 OP *k;
82092f1d 5622 kid = kUNOP->op_first; /* get past null */
79072805 5623
463ee0b2 5624 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5625 linklist(kid);
463ee0b2
LW		 5626 if (kid->op_type == OP_SCOPE) {
5627 k = kid->op_next;
5628 kid->op_next = 0;
79072805 5629 }
463ee0b2 5630 else if (kid->op_type == OP_LEAVE) {
11343788 5631 if (o->op_type == OP_SORT) {
748a9306
LW		 5632 null(kid); /* wipe out leave */
5633 kid->op_next = kid;
463ee0b2 5634
748a9306
LW		 5635 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5636 if (k->op_next == kid)
5637 k->op_next = 0;
5638 }
463ee0b2 5639 }
748a9306
LW		 5640 else
5641 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5642 k = kLISTOP->op_first;
463ee0b2 5643 }
a0d0e21e
LW		 5644 peep(k);
5645
11343788 5646 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5647 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5648 kid->op_next = kid;
5649 else
5650 kid->op_next = k;
11343788 5651 o->op_flags |= OPf_SPECIAL;
79072805 5652 }
c6e96bcb
GS		 5653 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5654 null(cLISTOPo->op_first->op_sibling);
79072805 5655 }
bbce6d69 5656
11343788 5657 return o;
79072805 5658}
bda4119b
GS		 5659
5660STATIC void
cea2e8a9 5661S_simplify_sort(pTHX_ OP *o)
9c007264 5662{
51a19bc0 5663 dTHR;
9c007264
JH		 5664 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5665 OP *k;
5666 int reversed;
5667 if (!(o->op_flags & OPf_STACKED))
5668 return;
9ea6e965
GS		 5669 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5670 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5671 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5672 if (kid->op_type != OP_SCOPE)
5673 return;
5674 kid = kLISTOP->op_last; /* get past scope */
5675 switch(kid->op_type) {
5676 case OP_NCMP:
5677 case OP_I_NCMP:
5678 case OP_SCMP:
5679 break;
5680 default:
5681 return;
5682 }
5683 k = kid; /* remember this node*/
5684 if (kBINOP->op_first->op_type != OP_RV2SV)
5685 return;
5686 kid = kBINOP->op_first; /* get past cmp */
5687 if (kUNOP->op_first->op_type != OP_GV)
5688 return;
5689 kid = kUNOP->op_first; /* get past rv2sv */
7934575e 5690 if (GvSTASH((GV*)kSVOP->op_sv) != PL_curstash)
9c007264 5691 return;
7934575e 5692 if (strEQ(GvNAME((GV*)kSVOP->op_sv), "a"))
9c007264 5693 reversed = 0;
7934575e 5694 else if(strEQ(GvNAME((GV*)kSVOP->op_sv), "b"))
9c007264
JH		 5695 reversed = 1;
5696 else
5697 return;
5698 kid = k; /* back to cmp */
5699 if (kBINOP->op_last->op_type != OP_RV2SV)
5700 return;
5701 kid = kBINOP->op_last; /* down to 2nd arg */
5702 if (kUNOP->op_first->op_type != OP_GV)
5703 return;
5704 kid = kUNOP->op_first; /* get past rv2sv */
7934575e 5705 if (GvSTASH((GV*)kSVOP->op_sv) != PL_curstash
9c007264 5706 || ( reversed
7934575e
GS		 5707 ? strNE(GvNAME((GV*)kSVOP->op_sv), "a")
5708 : strNE(GvNAME((GV*)kSVOP->op_sv), "b")))
9c007264
JH		 5709 return;
5710 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5711 if (reversed)
5712 o->op_private |= OPpSORT_REVERSE;
5713 if (k->op_type == OP_NCMP)
5714 o->op_private |= OPpSORT_NUMERIC;
5715 if (k->op_type == OP_I_NCMP)
5716 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 5717 kid = cLISTOPo->op_first->op_sibling;
5718 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
5719 op_free(kid); /* then delete it */
5720 cLISTOPo->op_children--;
9c007264 5721}
79072805
LW		 5722
5723OP *
cea2e8a9 5724Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5725{
5726 register OP *kid;
aeea060c 5727
11343788
MB		 5728 if (o->op_flags & OPf_STACKED)
5729 return no_fh_allowed(o);
79072805 5730
11343788 5731 kid = cLISTOPo->op_first;
8990e307 5732 if (kid->op_type != OP_NULL)
cea2e8a9 5733 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5734 kid = kid->op_sibling;
11343788
MB		 5735 op_free(cLISTOPo->op_first);
5736 cLISTOPo->op_first = kid;
85e6fe83 5737 if (!kid) {
79cb57f6 5738 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5739 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5740 }
79072805
LW		 5741
5742 if (kid->op_type != OP_MATCH) {
5743 OP *sibl = kid->op_sibling;
463ee0b2 5744 kid->op_sibling = 0;
79072805 5745 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5746 if (cLISTOPo->op_first == cLISTOPo->op_last)
5747 cLISTOPo->op_last = kid;
5748 cLISTOPo->op_first = kid;
79072805
LW		 5749 kid->op_sibling = sibl;
5750 }
5751
5752 kid->op_type = OP_PUSHRE;
22c35a8c 5753 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5754 scalar(kid);
5755
5756 if (!kid->op_sibling)
54b9620d 5757 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5758
5759 kid = kid->op_sibling;
5760 scalar(kid);
5761
5762 if (!kid->op_sibling)
11343788 5763 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5764
5765 kid = kid->op_sibling;
5766 scalar(kid);
5767
5768 if (kid->op_sibling)
22c35a8c 5769 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5770
11343788 5771 return o;
79072805
LW		 5772}
5773
5774OP *
eb6e2d6f
GS		 5775Perl_ck_join(pTHX_ OP *o)
5776{
5777 if (ckWARN(WARN_SYNTAX)) {
5778 OP *kid = cLISTOPo->op_first->op_sibling;
5779 if (kid && kid->op_type == OP_MATCH) {
5780 char *pmstr = "STRING";
5781 if (kPMOP->op_pmregexp)
5782 pmstr = kPMOP->op_pmregexp->precomp;
5783 Perl_warner(aTHX_ WARN_SYNTAX,
5784 "/%s/ should probably be written as \"%s\"",
5785 pmstr, pmstr);
5786 }
5787 }
5788 return ck_fun(o);
5789}
5790
5791OP *
cea2e8a9 5792Perl_ck_subr(pTHX_ OP *o)
79072805 5793{
11343788
MB		 5794 dTHR;
5795 OP *prev = ((cUNOPo->op_first->op_sibling)
5796 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5797 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5798 OP *cvop;
5799 char *proto = 0;
5800 CV *cv = 0;
46fc3d4c 5801 GV *namegv = 0;
4633a7c4
LW		 5802 int optional = 0;
5803 I32 arg = 0;
2d8e6c8d 5804 STRLEN n_a;
4633a7c4 5805
d3011074 5806 o->op_private |= OPpENTERSUB_HASTARG;
11343788 5807 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5808 if (cvop->op_type == OP_RV2CV) {
5809 SVOP* tmpop;
11343788 5810 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5811 null(cvop); /* disable rv2cv */
5812 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 5813 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
8ebc5c01 5814 cv = GvCVu(tmpop->op_sv);
76cd736e
GS		 5815 if (!cv)
5816 tmpop->op_private |= OPpEARLY_CV;
5817 else if (SvPOK(cv)) {
46fc3d4c 5818 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
2d8e6c8d 5819 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5820 }
4633a7c4
LW		 5821 }
5822 }
f5d5a27c 5823 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 5824 if (o2->op_type == OP_CONST)
5825 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 5826 else if (o2->op_type == OP_LIST) {
5827 OP *o = ((UNOP*)o2)->op_first->op_sibling;
5828 if (o && o->op_type == OP_CONST)
5829 o->op_private &= ~OPpCONST_STRICT;
5830 }
7a52d87a 5831 }
3280af22
NIS		 5832 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5833 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5834 o->op_private |= OPpENTERSUB_DB;
5835 while (o2 != cvop) {
4633a7c4
LW		 5836 if (proto) {
5837 switch (*proto) {
5838 case '\0':
5dc0d613 5839 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5840 case ';':
5841 optional = 1;
5842 proto++;
5843 continue;
5844 case '$':
5845 proto++;
5846 arg++;
11343788 5847 scalar(o2);
4633a7c4
LW		 5848 break;
5849 case '%':
5850 case '@':
11343788 5851 list(o2);
4633a7c4
LW		 5852 arg++;
5853 break;
5854 case '&':
5855 proto++;
5856 arg++;
11343788 5857 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5858 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5859 break;
5860 case '*':
2ba6ecf4 5861 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 5862 proto++;
5863 arg++;
11343788 5864 if (o2->op_type == OP_RV2GV)
2ba6ecf4 5865 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 5866 else if (o2->op_type == OP_CONST)
5867 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 5868 else if (o2->op_type == OP_ENTERSUB) {
5869 /* accidental subroutine, revert to bareword */
5870 OP *gvop = ((UNOP*)o2)->op_first;
5871 if (gvop && gvop->op_type == OP_NULL) {
5872 gvop = ((UNOP*)gvop)->op_first;
5873 if (gvop) {
5874 for (; gvop->op_sibling; gvop = gvop->op_sibling)
5875 ;
5876 if (gvop &&
5877 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
5878 (gvop = ((UNOP*)gvop)->op_first) &&
5879 gvop->op_type == OP_GV)
5880 {
5881 GV *gv = (GV*)((SVOP*)gvop)->op_sv;
5882 OP *sibling = o2->op_sibling;
2692f720 5883 SV *n = newSVpvn("",0);
9675f7ac 5884 op_free(o2);
2692f720
GS		 5885 gv_fullname3(n, gv, "");
5886 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
5887 sv_chop(n, SvPVX(n)+6);
5888 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 5889 prev->op_sibling = o2;
5890 o2->op_sibling = sibling;
5891 }
5892 }
5893 }
5894 }
2ba6ecf4
GS		 5895 scalar(o2);
5896 break;
4633a7c4
LW		 5897 case '\\':
5898 proto++;
5899 arg++;
5900 switch (*proto++) {
5901 case '*':
11343788 5902 if (o2->op_type != OP_RV2GV)
5dc0d613 5903 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5904 goto wrapref;
5905 case '&':
11343788 5906 if (o2->op_type != OP_RV2CV)
5dc0d613 5907 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5908 goto wrapref;
5909 case '$':
386acf99
GS		 5910 if (o2->op_type != OP_RV2SV
5911 && o2->op_type != OP_PADSV
1c01eb51
GS		 5912 && o2->op_type != OP_HELEM
5913 && o2->op_type != OP_AELEM
386acf99
GS		 5914 && o2->op_type != OP_THREADSV)
5915 {
5dc0d613 5916 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5917 }
4633a7c4
LW		 5918 goto wrapref;
5919 case '@':
11343788 5920 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5921 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5922 goto wrapref;
5923 case '%':
11343788 5924 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5925 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5926 wrapref:
5927 {
11343788 5928 OP* kid = o2;
6fa846a0 5929 OP* sib = kid->op_sibling;
4633a7c4 5930 kid->op_sibling = 0;
6fa846a0
GS		 5931 o2 = newUNOP(OP_REFGEN, 0, kid);
5932 o2->op_sibling = sib;
e858de61 5933 prev->op_sibling = o2;
4633a7c4
LW		 5934 }
5935 break;
5936 default: goto oops;
5937 }
5938 break;
b1cb66bf 5939 case ' ':
5940 proto++;
5941 continue;
4633a7c4
LW		 5942 default:
5943 oops:
cea2e8a9 5944 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 5945 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 5946 }
5947 }
5948 else
11343788
MB		 5949 list(o2);
5950 mod(o2, OP_ENTERSUB);
5951 prev = o2;
5952 o2 = o2->op_sibling;
4633a7c4 5953 }
fb73857a 5954 if (proto && !optional &&
5955 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5956 return too_few_arguments(o, gv_ename(namegv));
11343788 5957 return o;
79072805
LW		 5958}
5959
5960OP *
cea2e8a9 5961Perl_ck_svconst(pTHX_ OP *o)
8990e307 5962{
11343788
MB		 5963 SvREADONLY_on(cSVOPo->op_sv);
5964 return o;
8990e307
LW		 5965}
5966
5967OP *
cea2e8a9 5968Perl_ck_trunc(pTHX_ OP *o)
79072805 5969{
11343788
MB		 5970 if (o->op_flags & OPf_KIDS) {
5971 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5972
a0d0e21e
LW		 5973 if (kid->op_type == OP_NULL)
5974 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 5975 if (kid && kid->op_type == OP_CONST &&
5976 (kid->op_private & OPpCONST_BARE))
5977 {
11343788 5978 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 5979 kid->op_private &= ~OPpCONST_STRICT;
5980 }
79072805 5981 }
11343788 5982 return ck_fun(o);
79072805
LW		 5983}
5984
463ee0b2
LW		 5985/* A peephole optimizer. We visit the ops in the order they're to execute. */
5986
79072805 5987void
864dbfa3 5988Perl_peep(pTHX_ register OP *o)
79072805 5989{
11343788 5990 dTHR;
79072805 5991 register OP* oldop = 0;
2d8e6c8d 5992 STRLEN n_a;
cd06dffe 5993 OP *last_composite = Nullop;
2d8e6c8d 5994
a0d0e21e 5995 if (!o || o->op_seq)
79072805 5996 return;
a0d0e21e 5997 ENTER;
462e5cf6 5998 SAVEOP();
3280af22 5999 SAVESPTR(PL_curcop);
a0d0e21e
LW		 6000 for (; o; o = o->op_next) {
6001 if (o->op_seq)
6002 break;
3280af22
NIS		 6003 if (!PL_op_seqmax)
6004 PL_op_seqmax++;
533c011a 6005 PL_op = o;
a0d0e21e 6006 switch (o->op_type) {
acb36ea4 6007 case OP_SETSTATE:
a0d0e21e
LW		 6008 case OP_NEXTSTATE:
6009 case OP_DBSTATE:
3280af22
NIS		 6010 PL_curcop = ((COP*)o); /* for warnings */
6011 o->op_seq = PL_op_seqmax++;
cd06dffe 6012 last_composite = Nullop;
a0d0e21e
LW		 6013 break;
6014
a0d0e21e 6015 case OP_CONST:
7a52d87a
GS		 6016 if (cSVOPo->op_private & OPpCONST_STRICT)
6017 no_bareword_allowed(o);
6018 /* FALL THROUGH */
a0d0e21e
LW		 6019 case OP_UC:
6020 case OP_UCFIRST:
6021 case OP_LC:
6022 case OP_LCFIRST:
ed7ab888
GS		 6023 if ( o->op_next && o->op_next->op_type == OP_STRINGIFY
6024 && !(o->op_next->op_private & OPpTARGET_MY) )
6025 null(o->op_next);
6026 o->op_seq = PL_op_seqmax++;
6027 break;
6028 case OP_CONCAT:
6029 case OP_JOIN:
a0d0e21e 6030 case OP_QUOTEMETA:
b162f9ea
IZ		 6031 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6032 if (o->op_next->op_private & OPpTARGET_MY) {
ed7ab888 6033 if ((o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea
IZ		 6034 || (o->op_type == OP_CONCAT
6035 /* Concat has problems if target is equal to right arg. */
6036 && (((LISTOP*)o)->op_first->op_sibling->op_type
6037 == OP_PADSV)
6038 && (((LISTOP*)o)->op_first->op_sibling->op_targ
6039 == o->op_next->op_targ))) {
6040 goto ignore_optimization;
cd06dffe
GS		 6041 }
6042 else {
b162f9ea 6043 o->op_targ = o->op_next->op_targ;
2c2d71f5 6044 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6045 }
6046 }
a0d0e21e 6047 null(o->op_next);
b162f9ea
IZ		 6048 }
6049 ignore_optimization:
3280af22 6050 o->op_seq = PL_op_seqmax++;
a0d0e21e 6051 break;
8990e307 6052 case OP_STUB:
54310121 6053 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6054 o->op_seq = PL_op_seqmax++;
54310121 6055 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6056 }
748a9306 6057 goto nothin;
79072805 6058 case OP_NULL:
acb36ea4
GS		 6059 if (o->op_targ == OP_NEXTSTATE
6060 || o->op_targ == OP_DBSTATE
6061 || o->op_targ == OP_SETSTATE)
6062 {
3280af22 6063 PL_curcop = ((COP*)o);
acb36ea4 6064 }
748a9306 6065 goto nothin;
79072805 6066 case OP_SCALAR:
93a17b20 6067 case OP_LINESEQ:
463ee0b2 6068 case OP_SCOPE:
748a9306 6069 nothin:
a0d0e21e
LW		 6070 if (oldop && o->op_next) {
6071 oldop->op_next = o->op_next;
79072805
LW		 6072 continue;
6073 }
3280af22 6074 o->op_seq = PL_op_seqmax++;
79072805
LW		 6075 break;
6076
6077 case OP_GV:
a0d0e21e 6078 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 6079 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 6080 null(o->op_next);
6081 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
6082 o->op_next = o->op_next->op_next;
6083 o->op_type = OP_GVSV;
22c35a8c 6084 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6085 }
6086 }
a0d0e21e
LW		 6087 else if (o->op_next->op_type == OP_RV2AV) {
6088 OP* pop = o->op_next->op_next;
6089 IV i;
8990e307 6090 if (pop->op_type == OP_CONST &&
533c011a 6091 (PL_op = pop->op_next) &&
8990e307 6092 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6093 !(pop->op_next->op_private &
68dc0745 6094 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6095 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6096 <= 255 &&
8990e307
LW		 6097 i >= 0)
6098 {
a0d0e21e 6099 null(o->op_next);
8990e307
LW		 6100 null(pop->op_next);
6101 null(pop);
a0d0e21e
LW		 6102 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6103 o->op_next = pop->op_next->op_next;
6104 o->op_type = OP_AELEMFAST;
22c35a8c 6105 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6106 o->op_private = (U8)i;
7934575e 6107 GvAVn((GV*)((SVOP*)o)->op_sv);
8990e307 6108 }
79072805 6109 }
76cd736e 6110 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
7934575e 6111 GV *gv = (GV*)cSVOPo->op_sv;
76cd736e
GS		 6112 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6113 /* XXX could check prototype here instead of just carping */
6114 SV *sv = sv_newmortal();
6115 gv_efullname3(sv, gv, Nullch);
6116 Perl_warner(aTHX_ WARN_UNSAFE,
6117 "%s() called too early to check prototype",
6118 SvPV_nolen(sv));
6119 }
6120 }
6121
3280af22 6122 o->op_seq = PL_op_seqmax++;
79072805
LW		 6123 break;
6124
a0d0e21e 6125 case OP_MAPWHILE:
79072805
LW		 6126 case OP_GREPWHILE:
6127 case OP_AND:
6128 case OP_OR:
2c2d71f5
JH		 6129 case OP_ANDASSIGN:
6130 case OP_ORASSIGN:
1a67a97c
SM		 6131 case OP_COND_EXPR:
6132 case OP_RANGE:
3280af22 6133 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6134 while (cLOGOP->op_other->op_type == OP_NULL)
6135 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6136 peep(cLOGOP->op_other);
6137 break;
6138
79072805 6139 case OP_ENTERLOOP:
3280af22 6140 o->op_seq = PL_op_seqmax++;
79072805
LW		 6141 peep(cLOOP->op_redoop);
6142 peep(cLOOP->op_nextop);
6143 peep(cLOOP->op_lastop);
6144 break;
6145
8782bef2 6146 case OP_QR:
79072805
LW		 6147 case OP_MATCH:
6148 case OP_SUBST:
3280af22 6149 o->op_seq = PL_op_seqmax++;
a0d0e21e 6150 peep(cPMOP->op_pmreplstart);
79072805
LW		 6151 break;
6152
a0d0e21e 6153 case OP_EXEC:
3280af22 6154 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6155 if (ckWARN(WARN_SYNTAX) && o->op_next
6156 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6157 if (o->op_next->op_sibling &&
20408e3c
GS		 6158 o->op_next->op_sibling->op_type != OP_EXIT &&
6159 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6160 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 6161 line_t oldline = PL_curcop->cop_line;
a0d0e21e 6162
3280af22 6163 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
cea2e8a9
GS		 6164 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
6165 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 6166 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 6167 }
6168 }
6169 break;
aeea060c 6170
c750a3ec
MB		 6171 case OP_HELEM: {
6172 UNOP *rop;
6173 SV *lexname;
6174 GV **fields;
6175 SV **svp, **indsvp;
6176 I32 ind;
6177 char *key;
6178 STRLEN keylen;
aeea060c 6179
377b21bb 6180 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6181 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6182 break;
6183 rop = (UNOP*)((BINOP*)o)->op_first;
6184 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6185 break;
3280af22 6186 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6187 if (!SvOBJECT(lexname))
6188 break;
5196be3e 6189 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6190 if (!fields || !GvHV(*fields))
6191 break;
6192 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
6193 key = SvPV(*svp, keylen);
6194 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6195 if (!indsvp) {
88e9b055 6196 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6197 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6198 }
6199 ind = SvIV(*indsvp);
6200 if (ind < 1)
cea2e8a9 6201 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6202 rop->op_type = OP_RV2AV;
22c35a8c 6203 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6204 o->op_type = OP_AELEM;
22c35a8c 6205 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 6206 SvREFCNT_dec(*svp);
6207 *svp = newSViv(ind);
6208 break;
6209 }
6210
cd06dffe
GS		 6211 case OP_RV2AV:
6212 case OP_RV2HV:
6213 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6214 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6215 {
cd06dffe 6216 last_composite = o;
e1f15930 6217 }
cd06dffe
GS		 6218 o->op_seq = PL_op_seqmax++;
6219 break;
6220
6221 case OP_RETURN:
970c4905 6222 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6223 o->op_seq = PL_op_seqmax++;
6224 break;
6225 }
6226 /* FALL THROUGH */
6227
6228 case OP_LEAVESUBLV:
6229 if (last_composite) {
6230 OP *r = last_composite;
6231
6232 while (r->op_sibling)
6233 r = r->op_sibling;
6234 if (r->op_next == o
6235 || (r->op_next->op_type == OP_LIST
6236 && r->op_next->op_next == o))
6237 {
6238 if (last_composite->op_type == OP_RV2AV)
6239 yyerror("Lvalue subs returning arrays not implemented yet");
6240 else
6241 yyerror("Lvalue subs returning hashes not implemented yet");
6242 ;
6243 }
6244 }
6245 /* FALL THROUGH */
6246
79072805 6247 default:
3280af22 6248 o->op_seq = PL_op_seqmax++;
79072805
LW		 6249 break;
6250 }
a0d0e21e 6251 oldop = o;
79072805 6252 }
a0d0e21e 6253 LEAVE;
79072805 6254}
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