This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
https://perl5.git.perl.org / perl5.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Batch of small 64-bit/long double/large file support tweaks:
[perl5.git] / op.c
CommitLineData
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
LW		 20#include "perl.h"
21
76e3520e 22#ifdef PERL_OBJECT
22c35a8c 23#define CHECKCALL this->*PL_check
76e3520e 24#else
22c35a8c 25#define CHECKCALL *PL_check
b7dc083c
NIS		 26#endif
27
28/* #define PL_OP_SLAB_ALLOC */
29
30#ifdef PL_OP_SLAB_ALLOC
31#define SLAB_SIZE 8192
32static char *PL_OpPtr = NULL;
33static int PL_OpSpace = 0;
34#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
35 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
36 else \
37 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
38 } while (0)
39
864dbfa3 40STATIC void *
cea2e8a9 41S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 42{
43 Newz(m,PL_OpPtr,SLAB_SIZE,char);
44 PL_OpSpace = SLAB_SIZE - sz;
45 return PL_OpPtr += PL_OpSpace;
46}
76e3520e 47
b7dc083c
NIS		 48#else
49#define NewOp(m, var, c, type) Newz(m, var, c, type)
50#endif
e50aee73 51/*
5dc0d613 52 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 53 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 54 */
11343788 55#define CHECKOP(type,o) \
3280af22 56 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 57 ? ( op_free((OP*)o), \
cea2e8a9 58 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 59 Nullop ) \
cea2e8a9 60 : (CHECKCALL[type])(aTHX_ (OP*)o))
e50aee73 61
c53d7c7d
HS		 62#define PAD_MAX 999999999
63
76e3520e 64STATIC char*
cea2e8a9 65S_gv_ename(pTHX_ GV *gv)
4633a7c4 66{
2d8e6c8d 67 STRLEN n_a;
4633a7c4 68 SV* tmpsv = sv_newmortal();
46fc3d4c 69 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 70 return SvPV(tmpsv,n_a);
4633a7c4
LW		 71}
72
76e3520e 73STATIC OP *
cea2e8a9 74S_no_fh_allowed(pTHX_ OP *o)
79072805 75{
cea2e8a9 76 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 77 PL_op_desc[o->op_type]));
11343788 78 return o;
79072805
LW		 79}
80
76e3520e 81STATIC OP *
cea2e8a9 82S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 83{
cea2e8a9 84 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 85 return o;
79072805
LW		 86}
87
76e3520e 88STATIC OP *
cea2e8a9 89S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 90{
cea2e8a9 91 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 92 return o;
79072805
LW		 93}
94
76e3520e 95STATIC void
cea2e8a9 96S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 97{
cea2e8a9 98 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 99 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 100}
101
7a52d87a 102STATIC void
cea2e8a9 103S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 104{
cea2e8a9 105 Perl_warn(aTHX_ "Bareword \"%s\" not allowed while \"strict subs\" in use",
7a52d87a
GS		 106 SvPV_nolen(cSVOPo->op_sv));
107 ++PL_error_count;
108}
109
79072805
LW		 110/* "register" allocation */
111
112PADOFFSET
864dbfa3 113Perl_pad_allocmy(pTHX_ char *name)
93a17b20 114{
11343788 115 dTHR;
a0d0e21e
LW		 116 PADOFFSET off;
117 SV *sv;
118
834a4ddd
LW		 119 if (!(
120 isALPHA(name[1]) ||
121 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
122 name[1] == '_' && (int)strlen(name) > 2))
123 {
c4d0567e 124 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 125 /* 1999-02-27 mjd@plover.com */
126 char *p;
127 p = strchr(name, '\0');
128 /* The next block assumes the buffer is at least 205 chars
129 long. At present, it's always at least 256 chars. */
130 if (p-name > 200) {
131 strcpy(name+200, "...");
132 p = name+199;
133 }
134 else {
135 p[1] = '\0';
136 }
137 /* Move everything else down one character */
138 for (; p-name > 2; p--)
139 *p = *(p-1);
46fc3d4c 140 name[2] = toCTRL(name[1]);
141 name[1] = '^';
142 }
cea2e8a9 143 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 144 }
599cee73 145 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 146 SV **svp = AvARRAY(PL_comppad_name);
147 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 148 if ((sv = svp[off])
3280af22 149 && sv != &PL_sv_undef
c53d7c7d 150 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 151 && strEQ(name, SvPVX(sv)))
152 {
cea2e8a9 153 Perl_warner(aTHX_ WARN_UNSAFE,
9fbbe825 154 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 155 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 156 break;
157 }
158 }
159 }
a0d0e21e
LW		 160 off = pad_alloc(OP_PADSV, SVs_PADMY);
161 sv = NEWSV(1102,0);
93a17b20
LW		 162 sv_upgrade(sv, SVt_PVNV);
163 sv_setpv(sv, name);
3280af22 164 if (PL_in_my_stash) {
c750a3ec 165 if (*name != '$')
cea2e8a9 166 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"my\"",
dce40276 167 name));
c750a3ec
MB		 168 SvOBJECT_on(sv);
169 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 170 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
171 PL_sv_objcount++;
c750a3ec 172 }
3280af22 173 av_store(PL_comppad_name, off, sv);
65202027 174 SvNVX(sv) = (NV)PAD_MAX;
8990e307 175 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 176 if (!PL_min_intro_pending)
177 PL_min_intro_pending = off;
178 PL_max_intro_pending = off;
93a17b20 179 if (*name == '@')
3280af22 180 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 181 else if (*name == '%')
3280af22
NIS		 182 av_store(PL_comppad, off, (SV*)newHV());
183 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 184 return off;
185}
186
2680586e
GS		 187#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
188
76e3520e 189STATIC PADOFFSET
cea2e8a9 190S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 191 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 192{
11343788 193 dTHR;
748a9306 194 CV *cv;
93a17b20
LW		 195 I32 off;
196 SV *sv;
93a17b20 197 register I32 i;
c09156bb 198 register PERL_CONTEXT *cx;
93a17b20 199
748a9306 200 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 201 AV *curlist = CvPADLIST(cv);
202 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 203 AV *curname;
4fdae800 204
3280af22 205 if (!svp || *svp == &PL_sv_undef)
4633a7c4 206 continue;
748a9306
LW		 207 curname = (AV*)*svp;
208 svp = AvARRAY(curname);
93965878 209 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 210 if ((sv = svp[off]) &&
3280af22 211 sv != &PL_sv_undef &&
748a9306 212 seq <= SvIVX(sv) &&
13826f2c 213 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 214 strEQ(SvPVX(sv), name))
215 {
5f05dabc 216 I32 depth;
217 AV *oldpad;
218 SV *oldsv;
219
220 depth = CvDEPTH(cv);
221 if (!depth) {
9607fc9c 222 if (newoff) {
223 if (SvFAKE(sv))
224 continue;
4fdae800 225 return 0; /* don't clone from inactive stack frame */
9607fc9c 226 }
5f05dabc 227 depth = 1;
228 }
229 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
230 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 231 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 232 SV *namesv = NEWSV(1103,0);
748a9306 233 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 234 sv_upgrade(namesv, SVt_PVNV);
235 sv_setpv(namesv, name);
3280af22 236 av_store(PL_comppad_name, newoff, namesv);
65202027 237 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
c53d7c7d 238 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 239 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 240 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 241 SvOBJECT_on(namesv);
242 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 243 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 244 PL_sv_objcount++;
245 }
3280af22 246 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 247 /* "It's closures all the way down." */
3280af22 248 CvCLONE_on(PL_compcv);
54310121 249 if (cv == startcv) {
3280af22 250 if (CvANON(PL_compcv))
54310121 251 oldsv = Nullsv; /* no need to keep ref */
252 }
253 else {
28757baa 254 CV *bcv;
255 for (bcv = startcv;
256 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 257 bcv = CvOUTSIDE(bcv))
258 {
28757baa 259 if (CvANON(bcv))
260 CvCLONE_on(bcv);
261 else {
6b35e009
GS		 262 if (ckWARN(WARN_CLOSURE)
263 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
264 {
cea2e8a9 265 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 266 "Variable \"%s\" may be unavailable",
28757baa 267 name);
6b35e009 268 }
28757baa 269 break;
270 }
271 }
272 }
273 }
3280af22 274 else if (!CvUNIQUE(PL_compcv)) {
599cee73 275 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
cea2e8a9 276 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 277 "Variable \"%s\" will not stay shared", name);
5f05dabc 278 }
748a9306 279 }
3280af22 280 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 281 return newoff;
282 }
93a17b20
LW		 283 }
284 }
285
2680586e
GS		 286 if (flags & FINDLEX_NOSEARCH)
287 return 0;
288
93a17b20
LW		 289 /* Nothing in current lexical context--try eval's context, if any.
290 * This is necessary to let the perldb get at lexically scoped variables.
291 * XXX This will also probably interact badly with eval tree caching.
292 */
293
748a9306 294 for (i = cx_ix; i >= 0; i--) {
93a17b20 295 cx = &cxstack[i];
6b35e009 296 switch (CxTYPE(cx)) {
93a17b20 297 default:
748a9306
LW		 298 if (i == 0 && saweval) {
299 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 300 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 301 }
93a17b20
LW		 302 break;
303 case CXt_EVAL:
44a8e56a 304 switch (cx->blk_eval.old_op_type) {
305 case OP_ENTEREVAL:
6b35e009
GS		 306 if (CxREALEVAL(cx))
307 saweval = i;
44a8e56a 308 break;
309 case OP_REQUIRE:
310 /* require must have its own scope */
311 return 0;
312 }
93a17b20
LW		 313 break;
314 case CXt_SUB:
315 if (!saweval)
316 return 0;
317 cv = cx->blk_sub.cv;
3280af22 318 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 319 saweval = i; /* so we know where we were called from */
93a17b20 320 continue;
93a17b20 321 }
748a9306 322 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 323 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 324 }
325 }
326
748a9306
LW		 327 return 0;
328}
a0d0e21e 329
748a9306 330PADOFFSET
864dbfa3 331Perl_pad_findmy(pTHX_ char *name)
748a9306 332{
11343788 333 dTHR;
748a9306 334 I32 off;
54310121 335 I32 pendoff = 0;
748a9306 336 SV *sv;
3280af22
NIS		 337 SV **svp = AvARRAY(PL_comppad_name);
338 U32 seq = PL_cop_seqmax;
6b35e009 339 PERL_CONTEXT *cx;
33b8ce05 340 CV *outside;
748a9306 341
11343788
MB		 342#ifdef USE_THREADS
343 /*
344 * Special case to get lexical (and hence per-thread) @_.
345 * XXX I need to find out how to tell at parse-time whether use
346 * of @_ should refer to a lexical (from a sub) or defgv (global
347 * scope and maybe weird sub-ish things like formats). See
348 * startsub in perly.y. It's possible that @_ could be lexical
349 * (at least from subs) even in non-threaded perl.
350 */
351 if (strEQ(name, "@_"))
352 return 0; /* success. (NOT_IN_PAD indicates failure) */
353#endif /* USE_THREADS */
354
748a9306 355 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 356 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 357 if ((sv = svp[off]) &&
3280af22 358 sv != &PL_sv_undef &&
54310121 359 (!SvIVX(sv) ||
360 (seq <= SvIVX(sv) &&
361 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 362 strEQ(SvPVX(sv), name))
363 {
54310121 364 if (SvIVX(sv))
365 return (PADOFFSET)off;
366 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 367 }
368 }
748a9306 369
33b8ce05
GS		 370 outside = CvOUTSIDE(PL_compcv);
371
372 /* Check if if we're compiling an eval'', and adjust seq to be the
373 * eval's seq number. This depends on eval'' having a non-null
374 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 375 * identified by CvEVAL being true and CvGV being null. */
376 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 377 cx = &cxstack[cxstack_ix];
378 if (CxREALEVAL(cx))
379 seq = cx->blk_oldcop->cop_seq;
380 }
381
748a9306 382 /* See if it's in a nested scope */
2680586e 383 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 384 if (off) {
385 /* If there is a pending local definition, this new alias must die */
386 if (pendoff)
3280af22 387 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 388 return off; /* pad_findlex returns 0 for failure...*/
54310121 389 }
11343788 390 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 391}
392
393void
864dbfa3 394Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 395{
0453d815 396 dTHR;
93a17b20 397 I32 off;
3280af22 398 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 399 SV *sv;
3280af22
NIS		 400 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
401 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 402 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
403 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 404 }
405 }
406 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 407 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 408 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 409 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 410 }
411}
412
413PADOFFSET
864dbfa3 414Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 415{
11343788 416 dTHR;
79072805
LW		 417 SV *sv;
418 I32 retval;
419
3280af22 420 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 421 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 422 if (PL_pad_reset_pending)
a0d0e21e 423 pad_reset();
ed6116ce 424 if (tmptype & SVs_PADMY) {
79072805 425 do {
3280af22 426 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 427 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 428 retval = AvFILLp(PL_comppad);
79072805
LW		 429 }
430 else {
3280af22
NIS		 431 SV **names = AvARRAY(PL_comppad_name);
432 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 433 for (;;) {
434 /*
435 * "foreach" index vars temporarily become aliases to non-"my"
436 * values. Thus we must skip, not just pad values that are
437 * marked as current pad values, but also those with names.
438 */
3280af22
NIS		 439 if (++PL_padix <= names_fill &&
440 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 441 continue;
3280af22 442 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 443 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
444 break;
445 }
3280af22 446 retval = PL_padix;
79072805 447 }
8990e307 448 SvFLAGS(sv) |= tmptype;
3280af22 449 PL_curpad = AvARRAY(PL_comppad);
11343788 450#ifdef USE_THREADS
5dc0d613 451 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 452 (unsigned long) thr, (unsigned long) PL_curpad,
22c35a8c 453 (long) retval, PL_op_name[optype]));
11343788 454#else
d9bb4600 455 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 456 (unsigned long) PL_curpad,
22c35a8c 457 (long) retval, PL_op_name[optype]));
11343788 458#endif /* USE_THREADS */
79072805
LW		 459 return (PADOFFSET)retval;
460}
461
462SV *
864dbfa3 463Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 464{
11343788
MB		 465 dTHR;
466#ifdef USE_THREADS
5dc0d613 467 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 468 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 469#else
79072805 470 if (!po)
cea2e8a9 471 Perl_croak(aTHX_ "panic: pad_sv po");
d9bb4600 472 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 473 (unsigned long) PL_curpad, po));
11343788 474#endif /* USE_THREADS */
3280af22 475 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 476}
477
478void
864dbfa3 479Perl_pad_free(pTHX_ PADOFFSET po)
79072805 480{
11343788 481 dTHR;
3280af22 482 if (!PL_curpad)
a0d0e21e 483 return;
3280af22 484 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 485 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 486 if (!po)
cea2e8a9 487 Perl_croak(aTHX_ "panic: pad_free po");
11343788 488#ifdef USE_THREADS
5dc0d613 489 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 490 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 491#else
d9bb4600 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 493 (unsigned long) PL_curpad, po));
11343788 494#endif /* USE_THREADS */
3280af22
NIS		 495 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
496 SvPADTMP_off(PL_curpad[po]);
497 if ((I32)po < PL_padix)
498 PL_padix = po - 1;
79072805
LW		 499}
500
501void
864dbfa3 502Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 503{
11343788 504 dTHR;
3280af22 505 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 506 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 507 if (!po)
cea2e8a9 508 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 509#ifdef USE_THREADS
5dc0d613 510 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 511 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 512#else
d9bb4600 513 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 514 (unsigned long) PL_curpad, po));
11343788 515#endif /* USE_THREADS */
3280af22
NIS		 516 SvPADTMP_off(PL_curpad[po]);
517 PL_curpad[po] = NEWSV(1107,0);
518 SvPADTMP_on(PL_curpad[po]);
519 if ((I32)po < PL_padix)
520 PL_padix = po - 1;
79072805
LW		 521}
522
d9bb4600
GS		 523/* XXX pad_reset() is currently disabled because it results in serious bugs.
524 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
525 * on the stack by OPs that use them, there are several ways to get an alias
526 * to a shared TARG. Such an alias will change randomly and unpredictably.
527 * We avoid doing this until we can think of a Better Way.
528 * GSAR 97-10-29 */
79072805 529void
864dbfa3 530Perl_pad_reset(pTHX)
79072805 531{
d9bb4600 532#ifdef USE_BROKEN_PAD_RESET
11343788 533 dTHR;
79072805
LW		 534 register I32 po;
535
6b88bc9c 536 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 537 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 538#ifdef USE_THREADS
5dc0d613 539 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 540 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 541#else
d9bb4600 542 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 543 (unsigned long) PL_curpad));
11343788 544#endif /* USE_THREADS */
6b88bc9c
GS		 545 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
546 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
547 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
548 SvPADTMP_off(PL_curpad[po]);
748a9306 549 }
6b88bc9c 550 PL_padix = PL_padix_floor;
79072805 551 }
d9bb4600 552#endif
3280af22 553 PL_pad_reset_pending = FALSE;
79072805
LW		 554}
555
a863c7d1 556#ifdef USE_THREADS
54b9620d 557/* find_threadsv is not reentrant */
a863c7d1 558PADOFFSET
864dbfa3 559Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 560{
561 dTHR;
562 char *p;
563 PADOFFSET key;
554b3eca 564 SV **svp;
54b9620d 565 /* We currently only handle names of a single character */
533c011a 566 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 567 if (!p)
568 return NOT_IN_PAD;
533c011a 569 key = p - PL_threadsv_names;
2d8e6c8d 570 MUTEX_LOCK(&thr->mutex);
54b9620d 571 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 572 if (svp)
573 MUTEX_UNLOCK(&thr->mutex);
574 else {
554b3eca 575 SV *sv = NEWSV(0, 0);
54b9620d 576 av_store(thr->threadsv, key, sv);
940cb80d 577 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 578 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 579 /*
580 * Some magic variables used to be automagically initialised
581 * in gv_fetchpv. Those which are now per-thread magicals get
582 * initialised here instead.
583 */
584 switch (*name) {
54b9620d
MB		 585 case '_':
586 break;
554b3eca
MB		 587 case ';':
588 sv_setpv(sv, "\034");
54b9620d 589 sv_magic(sv, 0, 0, name, 1);
554b3eca 590 break;
c277df42
IZ		 591 case '&':
592 case '`':
593 case '\'':
533c011a 594 PL_sawampersand = TRUE;
a3f914c5
GS		 595 /* FALL THROUGH */
596 case '1':
597 case '2':
598 case '3':
599 case '4':
600 case '5':
601 case '6':
602 case '7':
603 case '8':
604 case '9':
c277df42 605 SvREADONLY_on(sv);
d8b5173a 606 /* FALL THROUGH */
067391ea
GS		 607
608 /* XXX %! tied to Errno.pm needs to be added here.
609 * See gv_fetchpv(). */
610 /* case '!': */
611
54b9620d
MB		 612 default:
613 sv_magic(sv, 0, 0, name, 1);
554b3eca 614 }
8b73bbec 615 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 616 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 617 sv, (*name < 32) ? "^" : "",
618 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 619 }
620 return key;
621}
622#endif /* USE_THREADS */
623
79072805
LW		 624/* Destructor */
625
626void
864dbfa3 627Perl_op_free(pTHX_ OP *o)
79072805 628{
85e6fe83 629 register OP *kid, *nextkid;
acb36ea4 630 OPCODE type;
79072805 631
5dc0d613 632 if (!o || o->op_seq == (U16)-1)
79072805
LW		 633 return;
634
11343788
MB		 635 if (o->op_flags & OPf_KIDS) {
636 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 637 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 638 op_free(kid);
85e6fe83 639 }
79072805 640 }
acb36ea4
GS		 641 type = o->op_type;
642 if (type == OP_NULL)
643 type = o->op_targ;
644
645 /* COP* is not cleared by op_clear() so that we may track line
646 * numbers etc even after null() */
647 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
648 cop_free((COP*)o);
649
650 op_clear(o);
651
652#ifdef PL_OP_SLAB_ALLOC
653 if ((char *) o == PL_OpPtr)
654 {
655 }
656#else
657 Safefree(o);
658#endif
659}
79072805 660
acb36ea4
GS		 661STATIC void
662S_op_clear(pTHX_ OP *o)
663{
11343788 664 switch (o->op_type) {
acb36ea4
GS		 665 case OP_NULL: /* Was holding old type, if any. */
666 case OP_ENTEREVAL: /* Was holding hints. */
667#ifdef USE_THREADS
668 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
669#endif
670 o->op_targ = 0;
a0d0e21e 671 break;
554b3eca 672#ifdef USE_THREADS
8dd3ba40
SM		 673 case OP_ENTERITER:
674 if (!(o->op_flags & OPf_SPECIAL))
675 break;
676 /* FALL THROUGH */
554b3eca 677#endif /* USE_THREADS */
a6006777 678 default:
ac4c12e7 679 if (!(o->op_flags & OPf_REF)
0b94c7bb 680 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 681 break;
682 /* FALL THROUGH */
463ee0b2 683 case OP_GVSV:
79072805 684 case OP_GV:
a6006777 685 case OP_AELEMFAST:
11343788 686 SvREFCNT_dec(cGVOPo->op_gv);
acb36ea4 687 cGVOPo->op_gv = Nullgv;
79072805
LW		 688 break;
689 case OP_CONST:
11343788 690 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 691 cSVOPo->op_sv = Nullsv;
79072805 692 break;
748a9306
LW		 693 case OP_GOTO:
694 case OP_NEXT:
695 case OP_LAST:
696 case OP_REDO:
11343788 697 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 698 break;
699 /* FALL THROUGH */
a0d0e21e 700 case OP_TRANS:
acb36ea4 701 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 702 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 703 cSVOPo->op_sv = Nullsv;
704 }
705 else {
a0ed51b3 706 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 707 cPVOPo->op_pv = Nullch;
708 }
a0d0e21e
LW		 709 break;
710 case OP_SUBST:
11343788 711 op_free(cPMOPo->op_pmreplroot);
acb36ea4 712 cPMOPo->op_pmreplroot = Nullop;
a0d0e21e 713 /* FALL THROUGH */
748a9306 714 case OP_PUSHRE:
a0d0e21e 715 case OP_MATCH:
8782bef2 716 case OP_QR:
c277df42 717 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 718 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 719 break;
79072805
LW		 720 }
721
11343788
MB		 722 if (o->op_targ > 0)
723 pad_free(o->op_targ);
79072805
LW		 724}
725
76e3520e 726STATIC void
3eb57f73
HS		 727S_cop_free(pTHX_ COP* cop)
728{
729 Safefree(cop->cop_label);
730 SvREFCNT_dec(cop->cop_filegv);
0453d815 731 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 732 SvREFCNT_dec(cop->cop_warnings);
733}
734
735STATIC void
cea2e8a9 736S_null(pTHX_ OP *o)
8990e307 737{
acb36ea4
GS		 738 if (o->op_type == OP_NULL)
739 return;
740 op_clear(o);
11343788
MB		 741 o->op_targ = o->op_type;
742 o->op_type = OP_NULL;
22c35a8c 743 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 744}
745
79072805
LW		 746/* Contextualizers */
747
463ee0b2 748#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 749
750OP *
864dbfa3 751Perl_linklist(pTHX_ OP *o)
79072805
LW		 752{
753 register OP *kid;
754
11343788
MB		 755 if (o->op_next)
756 return o->op_next;
79072805
LW		 757
758 /* establish postfix order */
11343788
MB		 759 if (cUNOPo->op_first) {
760 o->op_next = LINKLIST(cUNOPo->op_first);
761 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 762 if (kid->op_sibling)
763 kid->op_next = LINKLIST(kid->op_sibling);
764 else
11343788 765 kid->op_next = o;
79072805
LW		 766 }
767 }
768 else
11343788 769 o->op_next = o;
79072805 770
11343788 771 return o->op_next;
79072805
LW		 772}
773
774OP *
864dbfa3 775Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 776{
777 OP *kid;
11343788
MB		 778 if (o && o->op_flags & OPf_KIDS) {
779 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 780 scalar(kid);
781 }
11343788 782 return o;
79072805
LW		 783}
784
76e3520e 785STATIC OP *
cea2e8a9 786S_scalarboolean(pTHX_ OP *o)
8990e307 787{
d008e5eb 788 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 789 dTHR;
d008e5eb
GS		 790 if (ckWARN(WARN_SYNTAX)) {
791 line_t oldline = PL_curcop->cop_line;
a0d0e21e 792
d008e5eb
GS		 793 if (PL_copline != NOLINE)
794 PL_curcop->cop_line = PL_copline;
cea2e8a9 795 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
d008e5eb
GS		 796 PL_curcop->cop_line = oldline;
797 }
a0d0e21e 798 }
11343788 799 return scalar(o);
8990e307
LW		 800}
801
802OP *
864dbfa3 803Perl_scalar(pTHX_ OP *o)
79072805
LW		 804{
805 OP *kid;
806
a0d0e21e 807 /* assumes no premature commitment */
3280af22 808 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 809 || o->op_type == OP_RETURN)
11343788 810 return o;
79072805 811
b162f9ea
IZ		 812 if ((o->op_private & OPpTARGET_MY)
813 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
814 return scalar(o); /* As if inside SASSIGN */
815
5dc0d613 816 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 817
11343788 818 switch (o->op_type) {
79072805 819 case OP_REPEAT:
11343788
MB		 820 if (o->op_private & OPpREPEAT_DOLIST)
821 null(((LISTOP*)cBINOPo->op_first)->op_first);
822 scalar(cBINOPo->op_first);
8990e307 823 break;
79072805
LW		 824 case OP_OR:
825 case OP_AND:
826 case OP_COND_EXPR:
11343788 827 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 828 scalar(kid);
79072805 829 break;
a0d0e21e 830 case OP_SPLIT:
11343788 831 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 832 if (!kPMOP->op_pmreplroot)
833 deprecate("implicit split to @_");
834 }
835 /* FALL THROUGH */
79072805 836 case OP_MATCH:
8782bef2 837 case OP_QR:
79072805
LW		 838 case OP_SUBST:
839 case OP_NULL:
8990e307 840 default:
11343788
MB		 841 if (o->op_flags & OPf_KIDS) {
842 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 843 scalar(kid);
844 }
79072805
LW		 845 break;
846 case OP_LEAVE:
847 case OP_LEAVETRY:
5dc0d613 848 kid = cLISTOPo->op_first;
54310121 849 scalar(kid);
850 while (kid = kid->op_sibling) {
851 if (kid->op_sibling)
852 scalarvoid(kid);
853 else
854 scalar(kid);
855 }
3280af22 856 WITH_THR(PL_curcop = &PL_compiling);
54310121 857 break;
748a9306 858 case OP_SCOPE:
79072805 859 case OP_LINESEQ:
8990e307 860 case OP_LIST:
11343788 861 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 862 if (kid->op_sibling)
863 scalarvoid(kid);
864 else
865 scalar(kid);
866 }
3280af22 867 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 868 break;
869 }
11343788 870 return o;
79072805
LW		 871}
872
873OP *
864dbfa3 874Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 875{
876 OP *kid;
8990e307
LW		 877 char* useless = 0;
878 SV* sv;
2ebea0a1
GS		 879 U8 want;
880
acb36ea4
GS		 881 if (o->op_type == OP_NEXTSTATE
882 || o->op_type == OP_SETSTATE
883 || o->op_type == OP_DBSTATE
884 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
885 || o->op_targ == OP_SETSTATE
886 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 887 {
888 dTHR;
889 PL_curcop = (COP*)o; /* for warning below */
890 }
79072805 891
54310121 892 /* assumes no premature commitment */
2ebea0a1
GS		 893 want = o->op_flags & OPf_WANT;
894 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 895 || o->op_type == OP_RETURN)
11343788 896 return o;
79072805 897
b162f9ea
IZ		 898 if ((o->op_private & OPpTARGET_MY)
899 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
900 return scalar(o); /* As if inside SASSIGN */
901
5dc0d613 902 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 903
11343788 904 switch (o->op_type) {
79072805 905 default:
22c35a8c 906 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 907 break;
36477c24 908 /* FALL THROUGH */
909 case OP_REPEAT:
11343788 910 if (o->op_flags & OPf_STACKED)
8990e307 911 break;
5d82c453
GA		 912 goto func_ops;
913 case OP_SUBSTR:
914 if (o->op_private == 4)
915 break;
8990e307
LW		 916 /* FALL THROUGH */
917 case OP_GVSV:
918 case OP_WANTARRAY:
919 case OP_GV:
920 case OP_PADSV:
921 case OP_PADAV:
922 case OP_PADHV:
923 case OP_PADANY:
924 case OP_AV2ARYLEN:
8990e307 925 case OP_REF:
a0d0e21e
LW		 926 case OP_REFGEN:
927 case OP_SREFGEN:
8990e307
LW		 928 case OP_DEFINED:
929 case OP_HEX:
930 case OP_OCT:
931 case OP_LENGTH:
8990e307
LW		 932 case OP_VEC:
933 case OP_INDEX:
934 case OP_RINDEX:
935 case OP_SPRINTF:
936 case OP_AELEM:
937 case OP_AELEMFAST:
938 case OP_ASLICE:
8990e307
LW		 939 case OP_HELEM:
940 case OP_HSLICE:
941 case OP_UNPACK:
942 case OP_PACK:
8990e307
LW		 943 case OP_JOIN:
944 case OP_LSLICE:
945 case OP_ANONLIST:
946 case OP_ANONHASH:
947 case OP_SORT:
948 case OP_REVERSE:
949 case OP_RANGE:
950 case OP_FLIP:
951 case OP_FLOP:
952 case OP_CALLER:
953 case OP_FILENO:
954 case OP_EOF:
955 case OP_TELL:
956 case OP_GETSOCKNAME:
957 case OP_GETPEERNAME:
958 case OP_READLINK:
959 case OP_TELLDIR:
960 case OP_GETPPID:
961 case OP_GETPGRP:
962 case OP_GETPRIORITY:
963 case OP_TIME:
964 case OP_TMS:
965 case OP_LOCALTIME:
966 case OP_GMTIME:
967 case OP_GHBYNAME:
968 case OP_GHBYADDR:
969 case OP_GHOSTENT:
970 case OP_GNBYNAME:
971 case OP_GNBYADDR:
972 case OP_GNETENT:
973 case OP_GPBYNAME:
974 case OP_GPBYNUMBER:
975 case OP_GPROTOENT:
976 case OP_GSBYNAME:
977 case OP_GSBYPORT:
978 case OP_GSERVENT:
979 case OP_GPWNAM:
980 case OP_GPWUID:
981 case OP_GGRNAM:
982 case OP_GGRGID:
983 case OP_GETLOGIN:
5d82c453 984 func_ops:
11343788 985 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 986 useless = PL_op_desc[o->op_type];
8990e307
LW		 987 break;
988
989 case OP_RV2GV:
990 case OP_RV2SV:
991 case OP_RV2AV:
992 case OP_RV2HV:
11343788
MB		 993 if (!(o->op_private & OPpLVAL_INTRO) &&
994 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 995 useless = "a variable";
996 break;
79072805
LW		 997
998 case OP_CONST:
11343788 999 sv = cSVOPo->op_sv;
7a52d87a
GS		 1000 if (cSVOPo->op_private & OPpCONST_STRICT)
1001 no_bareword_allowed(o);
1002 else {
d008e5eb
GS		 1003 dTHR;
1004 if (ckWARN(WARN_VOID)) {
1005 useless = "a constant";
1006 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1007 useless = 0;
1008 else if (SvPOK(sv)) {
1009 if (strnEQ(SvPVX(sv), "di", 2) ||
1010 strnEQ(SvPVX(sv), "ds", 2) ||
1011 strnEQ(SvPVX(sv), "ig", 2))
1012 useless = 0;
1013 }
8990e307
LW		 1014 }
1015 }
acb36ea4 1016 null(o); /* don't execute or even remember it */
79072805
LW		 1017 break;
1018
1019 case OP_POSTINC:
11343788 1020 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1021 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1022 break;
1023
1024 case OP_POSTDEC:
11343788 1025 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1026 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1027 break;
1028
79072805
LW		 1029 case OP_OR:
1030 case OP_AND:
1031 case OP_COND_EXPR:
11343788 1032 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1033 scalarvoid(kid);
1034 break;
5aabfad6 1035
a0d0e21e 1036 case OP_NULL:
11343788 1037 if (o->op_flags & OPf_STACKED)
a0d0e21e 1038 break;
5aabfad6 1039 /* FALL THROUGH */
2ebea0a1
GS		 1040 case OP_NEXTSTATE:
1041 case OP_DBSTATE:
79072805
LW		 1042 case OP_ENTERTRY:
1043 case OP_ENTER:
1044 case OP_SCALAR:
11343788 1045 if (!(o->op_flags & OPf_KIDS))
79072805 1046 break;
54310121 1047 /* FALL THROUGH */
463ee0b2 1048 case OP_SCOPE:
79072805
LW		 1049 case OP_LEAVE:
1050 case OP_LEAVETRY:
a0d0e21e 1051 case OP_LEAVELOOP:
79072805 1052 case OP_LINESEQ:
79072805 1053 case OP_LIST:
11343788 1054 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1055 scalarvoid(kid);
1056 break;
c90c0ff4 1057 case OP_ENTEREVAL:
5196be3e 1058 scalarkids(o);
c90c0ff4 1059 break;
5aabfad6 1060 case OP_REQUIRE:
c90c0ff4 1061 /* all requires must return a boolean value */
5196be3e
MB		 1062 o->op_flags &= ~OPf_WANT;
1063 return scalar(o);
a0d0e21e 1064 case OP_SPLIT:
11343788 1065 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1066 if (!kPMOP->op_pmreplroot)
1067 deprecate("implicit split to @_");
1068 }
1069 break;
79072805 1070 }
d008e5eb
GS		 1071 if (useless) {
1072 dTHR;
1073 if (ckWARN(WARN_VOID))
cea2e8a9 1074 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1075 }
11343788 1076 return o;
79072805
LW		 1077}
1078
1079OP *
864dbfa3 1080Perl_listkids(pTHX_ OP *o)
79072805
LW		 1081{
1082 OP *kid;
11343788
MB		 1083 if (o && o->op_flags & OPf_KIDS) {
1084 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1085 list(kid);
1086 }
11343788 1087 return o;
79072805
LW		 1088}
1089
1090OP *
864dbfa3 1091Perl_list(pTHX_ OP *o)
79072805
LW		 1092{
1093 OP *kid;
1094
a0d0e21e 1095 /* assumes no premature commitment */
3280af22 1096 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1097 || o->op_type == OP_RETURN)
11343788 1098 return o;
79072805 1099
b162f9ea
IZ		 1100 if ((o->op_private & OPpTARGET_MY)
1101 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1102 return o; /* As if inside SASSIGN */
1103
5dc0d613 1104 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1105
11343788 1106 switch (o->op_type) {
79072805
LW		 1107 case OP_FLOP:
1108 case OP_REPEAT:
11343788 1109 list(cBINOPo->op_first);
79072805
LW		 1110 break;
1111 case OP_OR:
1112 case OP_AND:
1113 case OP_COND_EXPR:
11343788 1114 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1115 list(kid);
1116 break;
1117 default:
1118 case OP_MATCH:
8782bef2 1119 case OP_QR:
79072805
LW		 1120 case OP_SUBST:
1121 case OP_NULL:
11343788 1122 if (!(o->op_flags & OPf_KIDS))
79072805 1123 break;
11343788
MB		 1124 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1125 list(cBINOPo->op_first);
1126 return gen_constant_list(o);
79072805
LW		 1127 }
1128 case OP_LIST:
11343788 1129 listkids(o);
79072805
LW		 1130 break;
1131 case OP_LEAVE:
1132 case OP_LEAVETRY:
5dc0d613 1133 kid = cLISTOPo->op_first;
54310121 1134 list(kid);
1135 while (kid = kid->op_sibling) {
1136 if (kid->op_sibling)
1137 scalarvoid(kid);
1138 else
1139 list(kid);
1140 }
3280af22 1141 WITH_THR(PL_curcop = &PL_compiling);
54310121 1142 break;
748a9306 1143 case OP_SCOPE:
79072805 1144 case OP_LINESEQ:
11343788 1145 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1146 if (kid->op_sibling)
1147 scalarvoid(kid);
1148 else
1149 list(kid);
1150 }
3280af22 1151 WITH_THR(PL_curcop = &PL_compiling);
79072805 1152 break;
c90c0ff4 1153 case OP_REQUIRE:
1154 /* all requires must return a boolean value */
5196be3e
MB		 1155 o->op_flags &= ~OPf_WANT;
1156 return scalar(o);
79072805 1157 }
11343788 1158 return o;
79072805
LW		 1159}
1160
1161OP *
864dbfa3 1162Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1163{
1164 OP *kid;
1165
11343788
MB		 1166 if (o) {
1167 if (o->op_type == OP_LINESEQ ||
1168 o->op_type == OP_SCOPE ||
1169 o->op_type == OP_LEAVE ||
1170 o->op_type == OP_LEAVETRY)
463ee0b2 1171 {
0f15f207 1172 dTHR;
11343788 1173 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1174 if (kid->op_sibling) {
463ee0b2 1175 scalarvoid(kid);
ed6116ce 1176 }
463ee0b2 1177 }
3280af22 1178 PL_curcop = &PL_compiling;
79072805 1179 }
11343788 1180 o->op_flags &= ~OPf_PARENS;
3280af22 1181 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1182 o->op_flags |= OPf_PARENS;
79072805 1183 }
8990e307 1184 else
11343788
MB		 1185 o = newOP(OP_STUB, 0);
1186 return o;
79072805
LW		 1187}
1188
76e3520e 1189STATIC OP *
cea2e8a9 1190S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1191{
1192 OP *kid;
11343788
MB		 1193 if (o && o->op_flags & OPf_KIDS) {
1194 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1195 mod(kid, type);
79072805 1196 }
11343788 1197 return o;
79072805
LW		 1198}
1199
79072805 1200OP *
864dbfa3 1201Perl_mod(pTHX_ OP *o, I32 type)
79072805 1202{
11343788 1203 dTHR;
79072805
LW		 1204 OP *kid;
1205 SV *sv;
2d8e6c8d 1206 STRLEN n_a;
79072805 1207
3280af22 1208 if (!o || PL_error_count)
11343788 1209 return o;
79072805 1210
b162f9ea
IZ		 1211 if ((o->op_private & OPpTARGET_MY)
1212 && (PL_opargs[o->op_type] & OA_TARGLEX)) /* OPp share the meaning */
1213 return o;
1214
11343788 1215 switch (o->op_type) {
68dc0745 1216 case OP_UNDEF:
3280af22 1217 PL_modcount++;
5dc0d613 1218 return o;
a0d0e21e 1219 case OP_CONST:
11343788 1220 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1221 goto nomod;
3280af22
NIS		 1222 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1223 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1224 PL_eval_start = 0;
a0d0e21e
LW		 1225 }
1226 else if (!type) {
3280af22
NIS		 1227 SAVEI32(PL_compiling.cop_arybase);
1228 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1229 }
1230 else if (type == OP_REFGEN)
1231 goto nomod;
1232 else
cea2e8a9 1233 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1234 break;
5f05dabc 1235 case OP_STUB:
5196be3e 1236 if (o->op_flags & OPf_PARENS)
5f05dabc 1237 break;
1238 goto nomod;
a0d0e21e
LW		 1239 case OP_ENTERSUB:
1240 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1241 !(o->op_flags & OPf_STACKED)) {
1242 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1243 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1244 assert(cUNOPo->op_first->op_type == OP_NULL);
1245 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1246 break;
1247 }
1248 /* FALL THROUGH */
1249 default:
a0d0e21e
LW		 1250 nomod:
1251 /* grep, foreach, subcalls, refgen */
1252 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1253 break;
cea2e8a9 1254 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1255 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
22c35a8c
GS		 1256 ? "do block" : PL_op_desc[o->op_type]),
1257 type ? PL_op_desc[type] : "local"));
11343788 1258 return o;
79072805 1259
a0d0e21e
LW		 1260 case OP_PREINC:
1261 case OP_PREDEC:
1262 case OP_POW:
1263 case OP_MULTIPLY:
1264 case OP_DIVIDE:
1265 case OP_MODULO:
1266 case OP_REPEAT:
1267 case OP_ADD:
1268 case OP_SUBTRACT:
1269 case OP_CONCAT:
1270 case OP_LEFT_SHIFT:
1271 case OP_RIGHT_SHIFT:
1272 case OP_BIT_AND:
1273 case OP_BIT_XOR:
1274 case OP_BIT_OR:
1275 case OP_I_MULTIPLY:
1276 case OP_I_DIVIDE:
1277 case OP_I_MODULO:
1278 case OP_I_ADD:
1279 case OP_I_SUBTRACT:
11343788 1280 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1281 goto nomod;
3280af22 1282 PL_modcount++;
a0d0e21e
LW		 1283 break;
1284
79072805 1285 case OP_COND_EXPR:
11343788 1286 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1287 mod(kid, type);
79072805
LW		 1288 break;
1289
1290 case OP_RV2AV:
1291 case OP_RV2HV:
93af7a87 1292 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1293 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1294 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1295 PL_modcount = 10000;
11343788 1296 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1297 }
1298 /* FALL THROUGH */
79072805 1299 case OP_RV2GV:
5dc0d613 1300 if (scalar_mod_type(o, type))
3fe9a6f1 1301 goto nomod;
11343788 1302 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1303 /* FALL THROUGH */
1304 case OP_AASSIGN:
1305 case OP_ASLICE:
1306 case OP_HSLICE:
93a17b20
LW		 1307 case OP_NEXTSTATE:
1308 case OP_DBSTATE:
a0d0e21e
LW		 1309 case OP_REFGEN:
1310 case OP_CHOMP:
3280af22 1311 PL_modcount = 10000;
79072805 1312 break;
463ee0b2 1313 case OP_RV2SV:
11343788 1314 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1315 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1316 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1317 /* FALL THROUGH */
79072805 1318 case OP_GV:
463ee0b2 1319 case OP_AV2ARYLEN:
3280af22 1320 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1321 case OP_SASSIGN:
bf4b1e52
GS		 1322 case OP_ANDASSIGN:
1323 case OP_ORASSIGN:
8990e307 1324 case OP_AELEMFAST:
3280af22 1325 PL_modcount++;
8990e307
LW		 1326 break;
1327
748a9306
LW		 1328 case OP_PADAV:
1329 case OP_PADHV:
3280af22 1330 PL_modcount = 10000;
5196be3e
MB		 1331 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1332 return o; /* Treat \(@foo) like ordinary list. */
1333 if (scalar_mod_type(o, type))
3fe9a6f1 1334 goto nomod;
748a9306
LW		 1335 /* FALL THROUGH */
1336 case OP_PADSV:
3280af22 1337 PL_modcount++;
748a9306 1338 if (!type)
cea2e8a9 1339 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1340 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1341 break;
1342
554b3eca 1343#ifdef USE_THREADS
2faa37cc 1344 case OP_THREADSV:
533c011a 1345 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1346 break;
1347#endif /* USE_THREADS */
1348
748a9306
LW		 1349 case OP_PUSHMARK:
1350 break;
a0d0e21e 1351
69969c6f
SB		 1352 case OP_KEYS:
1353 if (type != OP_SASSIGN)
1354 goto nomod;
5d82c453
GA		 1355 goto lvalue_func;
1356 case OP_SUBSTR:
1357 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1358 goto nomod;
5f05dabc 1359 /* FALL THROUGH */
a0d0e21e 1360 case OP_POS:
463ee0b2 1361 case OP_VEC:
5d82c453 1362 lvalue_func:
11343788
MB		 1363 pad_free(o->op_targ);
1364 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1365 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1366 if (o->op_flags & OPf_KIDS)
1367 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1368 break;
a0d0e21e 1369
463ee0b2
LW		 1370 case OP_AELEM:
1371 case OP_HELEM:
11343788 1372 ref(cBINOPo->op_first, o->op_type);
68dc0745 1373 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1374 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1375 o->op_private |= OPpLVAL_DEFER;
3280af22 1376 PL_modcount++;
463ee0b2
LW		 1377 break;
1378
1379 case OP_SCOPE:
1380 case OP_LEAVE:
1381 case OP_ENTER:
11343788
MB		 1382 if (o->op_flags & OPf_KIDS)
1383 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1384 break;
1385
1386 case OP_NULL:
638bc118
GS		 1387 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1388 goto nomod;
1389 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1390 break;
11343788
MB		 1391 if (o->op_targ != OP_LIST) {
1392 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1393 break;
1394 }
1395 /* FALL THROUGH */
463ee0b2 1396 case OP_LIST:
11343788 1397 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1398 mod(kid, type);
1399 break;
1400 }
11343788 1401 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1402
1403 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1404 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1405 else if (!type) {
11343788
MB		 1406 o->op_private |= OPpLVAL_INTRO;
1407 o->op_flags &= ~OPf_SPECIAL;
3280af22 1408 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1409 }
a0d0e21e 1410 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1411 o->op_flags |= OPf_REF;
1412 return o;
463ee0b2
LW		 1413}
1414
864dbfa3 1415STATIC bool
cea2e8a9 1416S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1417{
1418 switch (type) {
1419 case OP_SASSIGN:
5196be3e 1420 if (o->op_type == OP_RV2GV)
3fe9a6f1 1421 return FALSE;
1422 /* FALL THROUGH */
1423 case OP_PREINC:
1424 case OP_PREDEC:
1425 case OP_POSTINC:
1426 case OP_POSTDEC:
1427 case OP_I_PREINC:
1428 case OP_I_PREDEC:
1429 case OP_I_POSTINC:
1430 case OP_I_POSTDEC:
1431 case OP_POW:
1432 case OP_MULTIPLY:
1433 case OP_DIVIDE:
1434 case OP_MODULO:
1435 case OP_REPEAT:
1436 case OP_ADD:
1437 case OP_SUBTRACT:
1438 case OP_I_MULTIPLY:
1439 case OP_I_DIVIDE:
1440 case OP_I_MODULO:
1441 case OP_I_ADD:
1442 case OP_I_SUBTRACT:
1443 case OP_LEFT_SHIFT:
1444 case OP_RIGHT_SHIFT:
1445 case OP_BIT_AND:
1446 case OP_BIT_XOR:
1447 case OP_BIT_OR:
1448 case OP_CONCAT:
1449 case OP_SUBST:
1450 case OP_TRANS:
49e9fbe6
GS		 1451 case OP_READ:
1452 case OP_SYSREAD:
1453 case OP_RECV:
bf4b1e52
GS		 1454 case OP_ANDASSIGN:
1455 case OP_ORASSIGN:
3fe9a6f1 1456 return TRUE;
1457 default:
1458 return FALSE;
1459 }
1460}
1461
35cd451c 1462STATIC bool
cea2e8a9 1463S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1464{
1465 switch (o->op_type) {
1466 case OP_PIPE_OP:
1467 case OP_SOCKPAIR:
1468 if (argnum == 2)
1469 return TRUE;
1470 /* FALL THROUGH */
1471 case OP_SYSOPEN:
1472 case OP_OPEN:
ded8aa31 1473 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1474 case OP_SOCKET:
1475 case OP_OPEN_DIR:
1476 case OP_ACCEPT:
1477 if (argnum == 1)
1478 return TRUE;
1479 /* FALL THROUGH */
1480 default:
1481 return FALSE;
1482 }
1483}
1484
463ee0b2 1485OP *
864dbfa3 1486Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1487{
1488 OP *kid;
11343788
MB		 1489 if (o && o->op_flags & OPf_KIDS) {
1490 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1491 ref(kid, type);
1492 }
11343788 1493 return o;
463ee0b2
LW		 1494}
1495
1496OP *
864dbfa3 1497Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1498{
1499 OP *kid;
463ee0b2 1500
3280af22 1501 if (!o || PL_error_count)
11343788 1502 return o;
463ee0b2 1503
11343788 1504 switch (o->op_type) {
a0d0e21e 1505 case OP_ENTERSUB:
e55aaa0e 1506 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1507 !(o->op_flags & OPf_STACKED)) {
1508 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1509 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1510 assert(cUNOPo->op_first->op_type == OP_NULL);
1511 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1512 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1513 }
1514 break;
aeea060c 1515
463ee0b2 1516 case OP_COND_EXPR:
11343788 1517 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1518 ref(kid, type);
1519 break;
8990e307 1520 case OP_RV2SV:
35cd451c
GS		 1521 if (type == OP_DEFINED)
1522 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1523 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1524 /* FALL THROUGH */
1525 case OP_PADSV:
5f05dabc 1526 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1527 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1528 : type == OP_RV2HV ? OPpDEREF_HV
1529 : OPpDEREF_SV);
11343788 1530 o->op_flags |= OPf_MOD;
a0d0e21e 1531 }
8990e307
LW		 1532 break;
1533
2faa37cc 1534 case OP_THREADSV:
a863c7d1
MB		 1535 o->op_flags |= OPf_MOD; /* XXX ??? */
1536 break;
1537
463ee0b2
LW		 1538 case OP_RV2AV:
1539 case OP_RV2HV:
aeea060c 1540 o->op_flags |= OPf_REF;
8990e307 1541 /* FALL THROUGH */
463ee0b2 1542 case OP_RV2GV:
35cd451c
GS		 1543 if (type == OP_DEFINED)
1544 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1545 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1546 break;
8990e307 1547
463ee0b2
LW		 1548 case OP_PADAV:
1549 case OP_PADHV:
aeea060c 1550 o->op_flags |= OPf_REF;
79072805 1551 break;
aeea060c 1552
8990e307 1553 case OP_SCALAR:
79072805 1554 case OP_NULL:
11343788 1555 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1556 break;
11343788 1557 ref(cBINOPo->op_first, type);
79072805
LW		 1558 break;
1559 case OP_AELEM:
1560 case OP_HELEM:
11343788 1561 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1562 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1563 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1564 : type == OP_RV2HV ? OPpDEREF_HV
1565 : OPpDEREF_SV);
11343788 1566 o->op_flags |= OPf_MOD;
8990e307 1567 }
79072805
LW		 1568 break;
1569
463ee0b2 1570 case OP_SCOPE:
79072805
LW		 1571 case OP_LEAVE:
1572 case OP_ENTER:
8990e307 1573 case OP_LIST:
11343788 1574 if (!(o->op_flags & OPf_KIDS))
79072805 1575 break;
11343788 1576 ref(cLISTOPo->op_last, type);
79072805 1577 break;
a0d0e21e
LW		 1578 default:
1579 break;
79072805 1580 }
11343788 1581 return scalar(o);
8990e307 1582
79072805
LW		 1583}
1584
1585OP *
864dbfa3 1586Perl_my(pTHX_ OP *o)
93a17b20
LW		 1587{
1588 OP *kid;
93a17b20
LW		 1589 I32 type;
1590
3280af22 1591 if (!o || PL_error_count)
11343788 1592 return o;
93a17b20 1593
11343788 1594 type = o->op_type;
93a17b20 1595 if (type == OP_LIST) {
11343788 1596 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1597 my(kid);
dab48698 1598 } else if (type == OP_UNDEF) {
7766148a 1599 return o;
dab48698 1600 } else if (type != OP_PADSV &&
93a17b20
LW		 1601 type != OP_PADAV &&
1602 type != OP_PADHV &&
1603 type != OP_PUSHMARK)
1604 {
cea2e8a9 1605 yyerror(Perl_form(aTHX_ "Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1606 return o;
93a17b20 1607 }
11343788
MB		 1608 o->op_flags |= OPf_MOD;
1609 o->op_private |= OPpLVAL_INTRO;
1610 return o;
93a17b20
LW		 1611}
1612
1613OP *
864dbfa3 1614Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1615{
1616 if (o)
1617 o->op_flags |= OPf_PARENS;
1618 return o;
1619}
1620
1621OP *
864dbfa3 1622Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1623{
d008e5eb 1624 dTHR;
11343788 1625 OP *o;
79072805 1626
599cee73
PM		 1627 if (ckWARN(WARN_UNSAFE) &&
1628 (left->op_type == OP_RV2AV ||
1629 left->op_type == OP_RV2HV ||
1630 left->op_type == OP_PADAV ||
1631 left->op_type == OP_PADHV)) {
22c35a8c 1632 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1633 right->op_type == OP_TRANS)
1634 ? right->op_type : OP_MATCH];
1635 char *sample = ((left->op_type == OP_RV2AV ||
1636 left->op_type == OP_PADAV)
1637 ? "@array" : "%hash");
cea2e8a9 1638 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73
PM		 1639 "Applying %s to %s will act on scalar(%s)",
1640 desc, sample, sample);
2ae324a7 1641 }
1642
79072805
LW		 1643 if (right->op_type == OP_MATCH ||
1644 right->op_type == OP_SUBST ||
1645 right->op_type == OP_TRANS) {
1646 right->op_flags |= OPf_STACKED;
1647 if (right->op_type != OP_MATCH)
463ee0b2 1648 left = mod(left, right->op_type);
79072805 1649 if (right->op_type == OP_TRANS)
11343788 1650 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1651 else
11343788 1652 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1653 if (type == OP_NOT)
11343788
MB		 1654 return newUNOP(OP_NOT, 0, scalar(o));
1655 return o;
79072805
LW		 1656 }
1657 else
1658 return bind_match(type, left,
1659 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1660}
1661
1662OP *
864dbfa3 1663Perl_invert(pTHX_ OP *o)
79072805 1664{
11343788
MB		 1665 if (!o)
1666 return o;
79072805 1667 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1668 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1669}
1670
1671OP *
864dbfa3 1672Perl_scope(pTHX_ OP *o)
79072805
LW		 1673{
1674 if (o) {
3280af22 1675 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1676 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1677 o->op_type = OP_LEAVE;
22c35a8c 1678 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1679 }
1680 else {
1681 if (o->op_type == OP_LINESEQ) {
1682 OP *kid;
1683 o->op_type = OP_SCOPE;
22c35a8c 1684 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
463ee0b2 1685 kid = ((LISTOP*)o)->op_first;
748a9306 1686 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
7399586d
HS		 1687 kid->op_type = OP_SETSTATE;
1688 kid->op_ppaddr = PL_ppaddr[OP_SETSTATE];
748a9306 1689 }
463ee0b2
LW		 1690 }
1691 else
748a9306 1692 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1693 }
79072805
LW		 1694 }
1695 return o;
1696}
1697
b3ac6de7 1698void
864dbfa3 1699Perl_save_hints(pTHX)
b3ac6de7 1700{
3280af22
NIS		 1701 SAVEI32(PL_hints);
1702 SAVESPTR(GvHV(PL_hintgv));
1703 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1704 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1705}
1706
a0d0e21e 1707int
864dbfa3 1708Perl_block_start(pTHX_ int full)
79072805 1709{
11343788 1710 dTHR;
3280af22 1711 int retval = PL_savestack_ix;
b3ac6de7 1712
3280af22 1713 SAVEI32(PL_comppad_name_floor);
55497cff 1714 if (full) {
3280af22
NIS		 1715 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1716 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1717 else
3280af22
NIS		 1718 PL_comppad_name_floor = 0;
1719 }
1720 SAVEI32(PL_min_intro_pending);
1721 SAVEI32(PL_max_intro_pending);
1722 PL_min_intro_pending = 0;
1723 SAVEI32(PL_comppad_name_fill);
1724 SAVEI32(PL_padix_floor);
1725 PL_padix_floor = PL_padix;
1726 PL_pad_reset_pending = FALSE;
b3ac6de7 1727 SAVEHINTS();
3280af22 1728 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1729 SAVEPPTR(PL_compiling.cop_warnings);
0453d815 1730 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 1731 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1732 SAVEFREESV(PL_compiling.cop_warnings) ;
1733 }
1734
1735
a0d0e21e
LW		 1736 return retval;
1737}
1738
1739OP*
864dbfa3 1740Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 1741{
11343788 1742 dTHR;
3280af22 1743 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1744 OP* retval = scalarseq(seq);
a0d0e21e 1745 LEAVE_SCOPE(floor);
3280af22 1746 PL_pad_reset_pending = FALSE;
e24b16f9 1747 PL_compiling.op_private = PL_hints;
a0d0e21e 1748 if (needblockscope)
3280af22
NIS		 1749 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1750 pad_leavemy(PL_comppad_name_fill);
1751 PL_cop_seqmax++;
a0d0e21e
LW		 1752 return retval;
1753}
1754
76e3520e 1755STATIC OP *
cea2e8a9 1756S_newDEFSVOP(pTHX)
54b9620d
MB		 1757{
1758#ifdef USE_THREADS
1759 OP *o = newOP(OP_THREADSV, 0);
1760 o->op_targ = find_threadsv("_");
1761 return o;
1762#else
3280af22 1763 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1764#endif /* USE_THREADS */
1765}
1766
a0d0e21e 1767void
864dbfa3 1768Perl_newPROG(pTHX_ OP *o)
a0d0e21e 1769{
11343788 1770 dTHR;
3280af22 1771 if (PL_in_eval) {
b295d113
TH		 1772 if (PL_eval_root)
1773 return;
faef0170
HS		 1774 PL_eval_root = newUNOP(OP_LEAVEEVAL,
1775 ((PL_in_eval & EVAL_KEEPERR)
1776 ? OPf_SPECIAL : 0), o);
3280af22
NIS		 1777 PL_eval_start = linklist(PL_eval_root);
1778 PL_eval_root->op_next = 0;
1779 peep(PL_eval_start);
a0d0e21e
LW		 1780 }
1781 else {
5dc0d613 1782 if (!o)
a0d0e21e 1783 return;
3280af22
NIS		 1784 PL_main_root = scope(sawparens(scalarvoid(o)));
1785 PL_curcop = &PL_compiling;
1786 PL_main_start = LINKLIST(PL_main_root);
1787 PL_main_root->op_next = 0;
1788 peep(PL_main_start);
1789 PL_compcv = 0;
3841441e 1790
4fdae800 1791 /* Register with debugger */
84902520 1792 if (PERLDB_INTER) {
864dbfa3 1793 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 1794 if (cv) {
1795 dSP;
924508f0 1796 PUSHMARK(SP);
3280af22 1797 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e 1798 PUTBACK;
864dbfa3 1799 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 1800 }
1801 }
79072805 1802 }
79072805
LW		 1803}
1804
1805OP *
864dbfa3 1806Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 1807{
1808 if (o->op_flags & OPf_PARENS)
1809 list(o);
8990e307 1810 else {
d008e5eb 1811 dTHR;
599cee73 1812 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1813 char *s;
834a4ddd 1814 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1815 if (*s == ';' || *s == '=')
cea2e8a9 1816 Perl_warner(aTHX_ WARN_PARENTHESIS, "Parentheses missing around \"%s\" list",
599cee73 1817 lex ? "my" : "local");
8990e307
LW		 1818 }
1819 }
3280af22
NIS		 1820 PL_in_my = FALSE;
1821 PL_in_my_stash = Nullhv;
93a17b20
LW		 1822 if (lex)
1823 return my(o);
1824 else
463ee0b2 1825 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1826}
1827
1828OP *
864dbfa3 1829Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 1830{
1831 if (o->op_type == OP_LIST) {
554b3eca
MB		 1832 OP *o2;
1833#ifdef USE_THREADS
2faa37cc 1834 o2 = newOP(OP_THREADSV, 0);
54b9620d 1835 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1836#else
1837 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1838#endif /* USE_THREADS */
1839 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1840 }
1841 return o;
1842}
1843
1844OP *
864dbfa3 1845Perl_fold_constants(pTHX_ register OP *o)
79072805 1846{
11343788 1847 dTHR;
79072805
LW		 1848 register OP *curop;
1849 I32 type = o->op_type;
748a9306 1850 SV *sv;
79072805 1851
22c35a8c 1852 if (PL_opargs[type] & OA_RETSCALAR)
79072805 1853 scalar(o);
b162f9ea 1854 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 1855 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1856
eac055e9
GS		 1857 /* integerize op, unless it happens to be C<-foo>.
1858 * XXX should pp_i_negate() do magic string negation instead? */
1859 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
1860 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
1861 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
1862 {
22c35a8c 1863 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 1864 }
85e6fe83 1865
22c35a8c 1866 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 1867 goto nope;
1868
de939608 1869 switch (type) {
7a52d87a
GS		 1870 case OP_NEGATE:
1871 /* XXX might want a ck_negate() for this */
1872 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
1873 break;
de939608
CS		 1874 case OP_SPRINTF:
1875 case OP_UCFIRST:
1876 case OP_LCFIRST:
1877 case OP_UC:
1878 case OP_LC:
69dcf70c
MB		 1879 case OP_SLT:
1880 case OP_SGT:
1881 case OP_SLE:
1882 case OP_SGE:
1883 case OP_SCMP:
1884
de939608
CS		 1885 if (o->op_private & OPpLOCALE)
1886 goto nope;
1887 }
1888
3280af22 1889 if (PL_error_count)
a0d0e21e
LW		 1890 goto nope; /* Don't try to run w/ errors */
1891
79072805 1892 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 1893 if ((curop->op_type != OP_CONST ||
1894 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 1895 curop->op_type != OP_LIST &&
1896 curop->op_type != OP_SCALAR &&
1897 curop->op_type != OP_NULL &&
1898 curop->op_type != OP_PUSHMARK)
1899 {
79072805
LW		 1900 goto nope;
1901 }
1902 }
1903
1904 curop = LINKLIST(o);
1905 o->op_next = 0;
533c011a 1906 PL_op = curop;
cea2e8a9 1907 CALLRUNOPS(aTHX);
3280af22 1908 sv = *(PL_stack_sp--);
748a9306 1909 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1910 pad_swipe(o->op_targ);
748a9306
LW		 1911 else if (SvTEMP(sv)) { /* grab mortal temp? */
1912 (void)SvREFCNT_inc(sv);
1913 SvTEMP_off(sv);
85e6fe83 1914 }
79072805
LW		 1915 op_free(o);
1916 if (type == OP_RV2GV)
b1cb66bf 1917 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1918 else {
ee580363
GS		 1919 /* try to smush double to int, but don't smush -2.0 to -2 */
1920 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1921 type != OP_NEGATE)
1922 {
748a9306 1923 IV iv = SvIV(sv);
65202027 1924 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 1925 SvREFCNT_dec(sv);
1926 sv = newSViv(iv);
1927 }
b1cb66bf 1928 else
1929 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1930 }
1931 return newSVOP(OP_CONST, 0, sv);
1932 }
aeea060c 1933
79072805 1934 nope:
22c35a8c 1935 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 1936 return o;
79072805 1937
3280af22 1938 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1939 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1940 return o;
1941
1942 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1943 if (curop->op_type == OP_CONST) {
b1cb66bf 1944 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1945 continue;
1946 return o;
1947 }
22c35a8c 1948 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1949 continue;
1950 return o;
1951 }
22c35a8c 1952 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 1953 }
1954
79072805
LW		 1955 return o;
1956}
1957
1958OP *
864dbfa3 1959Perl_gen_constant_list(pTHX_ register OP *o)
79072805 1960{
11343788 1961 dTHR;
79072805 1962 register OP *curop;
3280af22 1963 I32 oldtmps_floor = PL_tmps_floor;
79072805 1964
a0d0e21e 1965 list(o);
3280af22 1966 if (PL_error_count)
a0d0e21e
LW		 1967 return o; /* Don't attempt to run with errors */
1968
533c011a 1969 PL_op = curop = LINKLIST(o);
a0d0e21e 1970 o->op_next = 0;
cea2e8a9
GS		 1971 pp_pushmark();
1972 CALLRUNOPS(aTHX);
533c011a 1973 PL_op = curop;
cea2e8a9 1974 pp_anonlist();
3280af22 1975 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1976
1977 o->op_type = OP_RV2AV;
22c35a8c 1978 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 1979 curop = ((UNOP*)o)->op_first;
3280af22 1980 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1981 op_free(curop);
79072805
LW		 1982 linklist(o);
1983 return list(o);
1984}
1985
1986OP *
864dbfa3 1987Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 1988{
1989 OP *kid;
a0d0e21e 1990 OP *last = 0;
79072805 1991
11343788
MB		 1992 if (!o || o->op_type != OP_LIST)
1993 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1994 else
5dc0d613 1995 o->op_flags &= ~OPf_WANT;
79072805 1996
22c35a8c 1997 if (!(PL_opargs[type] & OA_MARK))
11343788 1998 null(cLISTOPo->op_first);
8990e307 1999
11343788 2000 o->op_type = type;
22c35a8c 2001 o->op_ppaddr = PL_ppaddr[type];
11343788 2002 o->op_flags |= flags;
79072805 2003
11343788
MB		 2004 o = CHECKOP(type, o);
2005 if (o->op_type != type)
2006 return o;
79072805 2007
11343788 2008 if (cLISTOPo->op_children < 7) {
79072805 2009 /* XXX do we really need to do this if we're done appending?? */
11343788 2010 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2011 last = kid;
11343788 2012 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2013 }
2014
11343788 2015 return fold_constants(o);
79072805
LW		 2016}
2017
2018/* List constructors */
2019
2020OP *
864dbfa3 2021Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2022{
2023 if (!first)
2024 return last;
8990e307
LW		 2025
2026 if (!last)
79072805 2027 return first;
8990e307 2028
a0d0e21e
LW		 2029 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
2030 return newLISTOP(type, 0, first, last);
79072805 2031
a0d0e21e
LW		 2032 if (first->op_flags & OPf_KIDS)
2033 ((LISTOP*)first)->op_last->op_sibling = last;
2034 else {
2035 first->op_flags |= OPf_KIDS;
2036 ((LISTOP*)first)->op_first = last;
2037 }
2038 ((LISTOP*)first)->op_last = last;
2039 ((LISTOP*)first)->op_children++;
2040 return first;
79072805
LW		 2041}
2042
2043OP *
864dbfa3 2044Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2045{
2046 if (!first)
2047 return (OP*)last;
8990e307
LW		 2048
2049 if (!last)
79072805 2050 return (OP*)first;
8990e307
LW		 2051
2052 if (first->op_type != type)
79072805 2053 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2054
2055 if (last->op_type != type)
79072805
LW		 2056 return append_elem(type, (OP*)first, (OP*)last);
2057
2058 first->op_last->op_sibling = last->op_first;
2059 first->op_last = last->op_last;
2060 first->op_children += last->op_children;
2061 if (first->op_children)
acb74605 2062 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2063
2064#ifdef PL_OP_SLAB_ALLOC
2065#else
2066 Safefree(last);
2067#endif
79072805
LW		 2068 return (OP*)first;
2069}
2070
2071OP *
864dbfa3 2072Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2073{
2074 if (!first)
2075 return last;
8990e307
LW		 2076
2077 if (!last)
79072805 2078 return first;
8990e307
LW		 2079
2080 if (last->op_type == type) {
2081 if (type == OP_LIST) { /* already a PUSHMARK there */
2082 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2083 ((LISTOP*)last)->op_first->op_sibling = first;
2084 }
2085 else {
2086 if (!(last->op_flags & OPf_KIDS)) {
2087 ((LISTOP*)last)->op_last = first;
2088 last->op_flags |= OPf_KIDS;
2089 }
2090 first->op_sibling = ((LISTOP*)last)->op_first;
2091 ((LISTOP*)last)->op_first = first;
79072805 2092 }
79072805
LW		 2093 ((LISTOP*)last)->op_children++;
2094 return last;
2095 }
2096
2097 return newLISTOP(type, 0, first, last);
2098}
2099
2100/* Constructors */
2101
2102OP *
864dbfa3 2103Perl_newNULLLIST(pTHX)
79072805 2104{
8990e307
LW		 2105 return newOP(OP_STUB, 0);
2106}
2107
2108OP *
864dbfa3 2109Perl_force_list(pTHX_ OP *o)
8990e307 2110{
11343788
MB		 2111 if (!o || o->op_type != OP_LIST)
2112 o = newLISTOP(OP_LIST, 0, o, Nullop);
2113 null(o);
2114 return o;
79072805
LW		 2115}
2116
2117OP *
864dbfa3 2118Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2119{
2120 LISTOP *listop;
2121
b7dc083c 2122 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2123
2124 listop->op_type = type;
22c35a8c 2125 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2126 listop->op_children = (first != 0) + (last != 0);
2127 listop->op_flags = flags;
79072805
LW		 2128
2129 if (!last && first)
2130 last = first;
2131 else if (!first && last)
2132 first = last;
8990e307
LW		 2133 else if (first)
2134 first->op_sibling = last;
79072805
LW		 2135 listop->op_first = first;
2136 listop->op_last = last;
8990e307
LW		 2137 if (type == OP_LIST) {
2138 OP* pushop;
2139 pushop = newOP(OP_PUSHMARK, 0);
2140 pushop->op_sibling = first;
2141 listop->op_first = pushop;
2142 listop->op_flags |= OPf_KIDS;
2143 if (!last)
2144 listop->op_last = pushop;
2145 }
2146 else if (listop->op_children)
2147 listop->op_flags |= OPf_KIDS;
79072805
LW		 2148
2149 return (OP*)listop;
2150}
2151
2152OP *
864dbfa3 2153Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2154{
11343788 2155 OP *o;
b7dc083c 2156 NewOp(1101, o, 1, OP);
11343788 2157 o->op_type = type;
22c35a8c 2158 o->op_ppaddr = PL_ppaddr[type];
11343788 2159 o->op_flags = flags;
79072805 2160
11343788
MB		 2161 o->op_next = o;
2162 o->op_private = 0 + (flags >> 8);
22c35a8c 2163 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2164 scalar(o);
22c35a8c 2165 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2166 o->op_targ = pad_alloc(type, SVs_PADTMP);
2167 return CHECKOP(type, o);
79072805
LW		 2168}
2169
2170OP *
864dbfa3 2171Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2172{
2173 UNOP *unop;
2174
93a17b20 2175 if (!first)
aeea060c 2176 first = newOP(OP_STUB, 0);
22c35a8c 2177 if (PL_opargs[type] & OA_MARK)
8990e307 2178 first = force_list(first);
93a17b20 2179
b7dc083c 2180 NewOp(1101, unop, 1, UNOP);
79072805 2181 unop->op_type = type;
22c35a8c 2182 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2183 unop->op_first = first;
2184 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2185 unop->op_private = 1 | (flags >> 8);
e50aee73 2186 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2187 if (unop->op_next)
2188 return (OP*)unop;
2189
a0d0e21e 2190 return fold_constants((OP *) unop);
79072805
LW		 2191}
2192
2193OP *
864dbfa3 2194Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2195{
2196 BINOP *binop;
b7dc083c 2197 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2198
2199 if (!first)
2200 first = newOP(OP_NULL, 0);
2201
2202 binop->op_type = type;
22c35a8c 2203 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2204 binop->op_first = first;
2205 binop->op_flags = flags | OPf_KIDS;
2206 if (!last) {
2207 last = first;
c07a80fd 2208 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2209 }
2210 else {
c07a80fd 2211 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2212 first->op_sibling = last;
2213 }
2214
e50aee73 2215 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2216 if (binop->op_next || binop->op_type != type)
79072805
LW		 2217 return (OP*)binop;
2218
7284ab6f 2219 binop->op_last = binop->op_first->op_sibling;
79072805 2220
a0d0e21e 2221 return fold_constants((OP *)binop);
79072805
LW		 2222}
2223
a0ed51b3
LW		 2224static int
2225utf8compare(const void *a, const void *b)
2226{
2227 int i;
2228 for (i = 0; i < 10; i++) {
2229 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2230 return -1;
2231 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2232 return 1;
2233 }
2234 return 0;
2235}
2236
79072805 2237OP *
864dbfa3 2238Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2239{
79072805
LW		 2240 SV *tstr = ((SVOP*)expr)->op_sv;
2241 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2242 STRLEN tlen;
2243 STRLEN rlen;
ec49126f 2244 register U8 *t = (U8*)SvPV(tstr, tlen);
2245 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2246 register I32 i;
2247 register I32 j;
a0ed51b3 2248 I32 del;
79072805 2249 I32 complement;
5d06d08e 2250 I32 squash;
79072805
LW		 2251 register short *tbl;
2252
11343788 2253 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2254 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2255 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2256
a0ed51b3 2257 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2258 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2259 SV* transv = 0;
2260 U8* tend = t + tlen;
2261 U8* rend = r + rlen;
2262 I32 ulen;
2263 U32 tfirst = 1;
2264 U32 tlast = 0;
2265 I32 tdiff;
2266 U32 rfirst = 1;
2267 U32 rlast = 0;
2268 I32 rdiff;
2269 I32 diff;
2270 I32 none = 0;
2271 U32 max = 0;
2272 I32 bits;
2273 I32 grows = 0;
2274 I32 havefinal = 0;
2275 U32 final;
2276 HV *hv;
2277 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2278 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2279
2280 if (complement) {
2281 U8 tmpbuf[10];
2282 U8** cp;
2283 UV nextmin = 0;
2284 New(1109, cp, tlen, U8*);
2285 i = 0;
79cb57f6 2286 transv = newSVpvn("",0);
a0ed51b3
LW		 2287 while (t < tend) {
2288 cp[i++] = t;
2289 t += UTF8SKIP(t);
2290 if (*t == 0xff) {
2291 t++;
2292 t += UTF8SKIP(t);
2293 }
2294 }
2295 qsort(cp, i, sizeof(U8*), utf8compare);
2296 for (j = 0; j < i; j++) {
2297 U8 *s = cp[j];
2298 UV val = utf8_to_uv(s, &ulen);
2299 s += ulen;
2300 diff = val - nextmin;
2301 if (diff > 0) {
2302 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2303 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2304 if (diff > 1) {
2305 t = uv_to_utf8(tmpbuf, val - 1);
2306 sv_catpvn(transv, "\377", 1);
dfe13c55 2307 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2308 }
2309 }
2310 if (*s == 0xff)
2311 val = utf8_to_uv(s+1, &ulen);
2312 if (val >= nextmin)
2313 nextmin = val + 1;
2314 }
2315 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2316 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2317 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2318 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2319 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2320 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2321 tlen = SvCUR(transv);
2322 tend = t + tlen;
2323 }
2324 else if (!rlen && !del) {
2325 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2326 }
2327 if (!squash) {
2328 if (to_utf && from_utf) { /* only counting characters */
2329 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2330 o->op_private |= OPpTRANS_IDENTICAL;
2331 }
2332 else { /* straight latin-1 translation */
2333 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2334 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2335 o->op_private |= OPpTRANS_IDENTICAL;
2336 }
a0ed51b3
LW		 2337 }
2338
2339 while (t < tend || tfirst <= tlast) {
2340 /* see if we need more "t" chars */
2341 if (tfirst > tlast) {
2342 tfirst = (I32)utf8_to_uv(t, &ulen);
2343 t += ulen;
2344 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2345 tlast = (I32)utf8_to_uv(++t, &ulen);
2346 t += ulen;
2347 }
2348 else
2349 tlast = tfirst;
2350 }
2351
2352 /* now see if we need more "r" chars */
2353 if (rfirst > rlast) {
2354 if (r < rend) {
2355 rfirst = (I32)utf8_to_uv(r, &ulen);
2356 r += ulen;
2357 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2358 rlast = (I32)utf8_to_uv(++r, &ulen);
2359 r += ulen;
2360 }
2361 else
2362 rlast = rfirst;
2363 }
2364 else {
2365 if (!havefinal++)
2366 final = rlast;
2367 rfirst = rlast = 0xffffffff;
2368 }
2369 }
2370
2371 /* now see which range will peter our first, if either. */
2372 tdiff = tlast - tfirst;
2373 rdiff = rlast - rfirst;
2374
2375 if (tdiff <= rdiff)
2376 diff = tdiff;
2377 else
2378 diff = rdiff;
2379
2380 if (rfirst == 0xffffffff) {
2381 diff = tdiff; /* oops, pretend rdiff is infinite */
2382 if (diff > 0)
cea2e8a9 2383 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
a0ed51b3 2384 else
cea2e8a9 2385 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\tXXXX\n", tfirst);
a0ed51b3
LW		 2386 }
2387 else {
2388 if (diff > 0)
cea2e8a9 2389 Perl_sv_catpvf(aTHX_ listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
a0ed51b3 2390 else
cea2e8a9 2391 Perl_sv_catpvf(aTHX_ listsv, "%04x\t\t%04x\n", tfirst, rfirst);
a0ed51b3
LW		 2392
2393 if (rfirst + diff > max)
2394 max = rfirst + diff;
2395 rfirst += diff + 1;
2396 if (!grows) {
2397 if (rfirst <= 0x80)
2398 ;
2399 else if (rfirst <= 0x800)
2400 grows |= (tfirst < 0x80);
2401 else if (rfirst <= 0x10000)
2402 grows |= (tfirst < 0x800);
2403 else if (rfirst <= 0x200000)
2404 grows |= (tfirst < 0x10000);
2405 else if (rfirst <= 0x4000000)
2406 grows |= (tfirst < 0x200000);
2407 else if (rfirst <= 0x80000000)
2408 grows |= (tfirst < 0x4000000);
2409 }
2410 }
2411 tfirst += diff + 1;
2412 }
2413
2414 none = ++max;
2415 if (del)
2416 del = ++max;
2417
2418 if (max > 0xffff)
2419 bits = 32;
2420 else if (max > 0xff)
2421 bits = 16;
2422 else
2423 bits = 8;
2424
2425 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2426 SvREFCNT_dec(listsv);
2427 if (transv)
2428 SvREFCNT_dec(transv);
2429
2430 if (!del && havefinal)
2431 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2432
2433 if (grows && to_utf)
2434 o->op_private |= OPpTRANS_GROWS;
2435
2436 op_free(expr);
2437 op_free(repl);
2438 return o;
2439 }
2440
2441 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2442 if (complement) {
2443 Zero(tbl, 256, short);
2444 for (i = 0; i < tlen; i++)
ec49126f 2445 tbl[t[i]] = -1;
79072805
LW		 2446 for (i = 0, j = 0; i < 256; i++) {
2447 if (!tbl[i]) {
2448 if (j >= rlen) {
a0ed51b3 2449 if (del)
79072805
LW		 2450 tbl[i] = -2;
2451 else if (rlen)
ec49126f 2452 tbl[i] = r[j-1];
79072805
LW		 2453 else
2454 tbl[i] = i;
2455 }
2456 else
ec49126f 2457 tbl[i] = r[j++];
79072805
LW		 2458 }
2459 }
2460 }
2461 else {
a0ed51b3 2462 if (!rlen && !del) {
79072805 2463 r = t; rlen = tlen;
5d06d08e 2464 if (!squash)
4757a243 2465 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2466 }
2467 for (i = 0; i < 256; i++)
2468 tbl[i] = -1;
2469 for (i = 0, j = 0; i < tlen; i++,j++) {
2470 if (j >= rlen) {
a0ed51b3 2471 if (del) {
ec49126f 2472 if (tbl[t[i]] == -1)
2473 tbl[t[i]] = -2;
79072805
LW		 2474 continue;
2475 }
2476 --j;
2477 }
ec49126f 2478 if (tbl[t[i]] == -1)
2479 tbl[t[i]] = r[j];
79072805
LW		 2480 }
2481 }
2482 op_free(expr);
2483 op_free(repl);
2484
11343788 2485 return o;
79072805
LW		 2486}
2487
2488OP *
864dbfa3 2489Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2490{
11343788 2491 dTHR;
79072805
LW		 2492 PMOP *pmop;
2493
b7dc083c 2494 NewOp(1101, pmop, 1, PMOP);
79072805 2495 pmop->op_type = type;
22c35a8c 2496 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2497 pmop->op_flags = flags;
c07a80fd 2498 pmop->op_private = 0 | (flags >> 8);
79072805 2499
3280af22 2500 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2501 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2502 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2503 pmop->op_pmpermflags |= PMf_LOCALE;
2504 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2505
79072805 2506 /* link into pm list */
3280af22
NIS		 2507 if (type != OP_TRANS && PL_curstash) {
2508 pmop->op_pmnext = HvPMROOT(PL_curstash);
2509 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2510 }
2511
2512 return (OP*)pmop;
2513}
2514
2515OP *
864dbfa3 2516Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2517{
5c0ca799 2518 dTHR;
79072805
LW		 2519 PMOP *pm;
2520 LOGOP *rcop;
ce862d02 2521 I32 repl_has_vars = 0;
79072805 2522
11343788
MB		 2523 if (o->op_type == OP_TRANS)
2524 return pmtrans(o, expr, repl);
79072805 2525
3280af22 2526 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2527 pm = (PMOP*)o;
79072805
LW		 2528
2529 if (expr->op_type == OP_CONST) {
463ee0b2 2530 STRLEN plen;
79072805 2531 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2532 char *p = SvPV(pat, plen);
11343788 2533 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2534 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2535 p = SvPV(pat, plen);
79072805
LW		 2536 pm->op_pmflags |= PMf_SKIPWHITE;
2537 }
cea2e8a9 2538 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2539 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2540 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2541 op_free(expr);
2542 }
2543 else {
3280af22
NIS		 2544 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2545 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2546 ? OP_REGCRESET
2547 : OP_REGCMAYBE),0,expr);
463ee0b2 2548
b7dc083c 2549 NewOp(1101, rcop, 1, LOGOP);
79072805 2550 rcop->op_type = OP_REGCOMP;
22c35a8c 2551 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2552 rcop->op_first = scalar(expr);
3280af22 2553 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2554 ? (OPf_SPECIAL | OPf_KIDS)
2555 : OPf_KIDS);
79072805 2556 rcop->op_private = 1;
11343788 2557 rcop->op_other = o;
79072805
LW		 2558
2559 /* establish postfix order */
3280af22 2560 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2561 LINKLIST(expr);
2562 rcop->op_next = expr;
2563 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2564 }
2565 else {
2566 rcop->op_next = LINKLIST(expr);
2567 expr->op_next = (OP*)rcop;
2568 }
79072805 2569
11343788 2570 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2571 }
2572
2573 if (repl) {
748a9306 2574 OP *curop;
0244c3a4 2575 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2576 curop = 0;
0244c3a4
GS		 2577 if (PL_curcop->cop_line < PL_multi_end)
2578 PL_curcop->cop_line = PL_multi_end;
2579 }
554b3eca 2580#ifdef USE_THREADS
2faa37cc 2581 else if (repl->op_type == OP_THREADSV
554b3eca 2582 && strchr("&`'123456789+",
533c011a 2583 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2584 {
2585 curop = 0;
2586 }
2587#endif /* USE_THREADS */
748a9306
LW		 2588 else if (repl->op_type == OP_CONST)
2589 curop = repl;
79072805 2590 else {
79072805
LW		 2591 OP *lastop = 0;
2592 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2593 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2594#ifdef USE_THREADS
ce862d02
IZ		 2595 if (curop->op_type == OP_THREADSV) {
2596 repl_has_vars = 1;
be949f6f 2597 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2598 break;
554b3eca
MB		 2599 }
2600#else
79072805
LW		 2601 if (curop->op_type == OP_GV) {
2602 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2603 repl_has_vars = 1;
93a17b20 2604 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2605 break;
2606 }
554b3eca 2607#endif /* USE_THREADS */
79072805
LW		 2608 else if (curop->op_type == OP_RV2CV)
2609 break;
2610 else if (curop->op_type == OP_RV2SV ||
2611 curop->op_type == OP_RV2AV ||
2612 curop->op_type == OP_RV2HV ||
2613 curop->op_type == OP_RV2GV) {
2614 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2615 break;
2616 }
748a9306
LW		 2617 else if (curop->op_type == OP_PADSV ||
2618 curop->op_type == OP_PADAV ||
2619 curop->op_type == OP_PADHV ||
554b3eca 2620 curop->op_type == OP_PADANY) {
ce862d02 2621 repl_has_vars = 1;
748a9306 2622 }
1167e5da
SM		 2623 else if (curop->op_type == OP_PUSHRE)
2624 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2625 else
2626 break;
2627 }
2628 lastop = curop;
2629 }
748a9306 2630 }
ce862d02
IZ		 2631 if (curop == repl
2632 && !(repl_has_vars
2633 && (!pm->op_pmregexp
2634 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2635 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2636 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2637 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2638 }
2639 else {
ce862d02
IZ		 2640 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2641 pm->op_pmflags |= PMf_MAYBE_CONST;
2642 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2643 }
b7dc083c 2644 NewOp(1101, rcop, 1, LOGOP);
748a9306 2645 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2646 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2647 rcop->op_first = scalar(repl);
2648 rcop->op_flags |= OPf_KIDS;
2649 rcop->op_private = 1;
11343788 2650 rcop->op_other = o;
748a9306
LW		 2651
2652 /* establish postfix order */
2653 rcop->op_next = LINKLIST(repl);
2654 repl->op_next = (OP*)rcop;
2655
2656 pm->op_pmreplroot = scalar((OP*)rcop);
2657 pm->op_pmreplstart = LINKLIST(rcop);
2658 rcop->op_next = 0;
79072805
LW		 2659 }
2660 }
2661
2662 return (OP*)pm;
2663}
2664
2665OP *
864dbfa3 2666Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2667{
2668 SVOP *svop;
b7dc083c 2669 NewOp(1101, svop, 1, SVOP);
79072805 2670 svop->op_type = type;
22c35a8c 2671 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2672 svop->op_sv = sv;
2673 svop->op_next = (OP*)svop;
2674 svop->op_flags = flags;
22c35a8c 2675 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2676 scalar((OP*)svop);
22c35a8c 2677 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2678 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2679 return CHECKOP(type, svop);
79072805
LW		 2680}
2681
2682OP *
864dbfa3 2683Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 2684{
11343788 2685 dTHR;
79072805 2686 GVOP *gvop;
b7dc083c 2687 NewOp(1101, gvop, 1, GVOP);
79072805 2688 gvop->op_type = type;
22c35a8c 2689 gvop->op_ppaddr = PL_ppaddr[type];
8990e307 2690 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2691 gvop->op_next = (OP*)gvop;
2692 gvop->op_flags = flags;
22c35a8c 2693 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2694 scalar((OP*)gvop);
22c35a8c 2695 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2696 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2697 return CHECKOP(type, gvop);
79072805
LW		 2698}
2699
2700OP *
864dbfa3 2701Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 2702{
2703 PVOP *pvop;
b7dc083c 2704 NewOp(1101, pvop, 1, PVOP);
79072805 2705 pvop->op_type = type;
22c35a8c 2706 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2707 pvop->op_pv = pv;
2708 pvop->op_next = (OP*)pvop;
2709 pvop->op_flags = flags;
22c35a8c 2710 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2711 scalar((OP*)pvop);
22c35a8c 2712 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2713 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2714 return CHECKOP(type, pvop);
79072805
LW		 2715}
2716
79072805 2717void
864dbfa3 2718Perl_package(pTHX_ OP *o)
79072805 2719{
11343788 2720 dTHR;
93a17b20 2721 SV *sv;
79072805 2722
3280af22
NIS		 2723 save_hptr(&PL_curstash);
2724 save_item(PL_curstname);
11343788 2725 if (o) {
463ee0b2
LW		 2726 STRLEN len;
2727 char *name;
11343788 2728 sv = cSVOPo->op_sv;
463ee0b2 2729 name = SvPV(sv, len);
3280af22
NIS		 2730 PL_curstash = gv_stashpvn(name,len,TRUE);
2731 sv_setpvn(PL_curstname, name, len);
11343788 2732 op_free(o);
93a17b20
LW		 2733 }
2734 else {
3280af22
NIS		 2735 sv_setpv(PL_curstname,"<none>");
2736 PL_curstash = Nullhv;
93a17b20 2737 }
7ad382f4 2738 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2739 PL_copline = NOLINE;
2740 PL_expect = XSTATE;
79072805
LW		 2741}
2742
85e6fe83 2743void
864dbfa3 2744Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2745{
a0d0e21e
LW		 2746 OP *pack;
2747 OP *meth;
2748 OP *rqop;
2749 OP *imop;
b1cb66bf 2750 OP *veop;
78ca652e 2751 GV *gv;
85e6fe83 2752
a0d0e21e 2753 if (id->op_type != OP_CONST)
cea2e8a9 2754 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 2755
b1cb66bf 2756 veop = Nullop;
2757
2758 if(version != Nullop) {
2759 SV *vesv = ((SVOP*)version)->op_sv;
2760
2761 if (arg == Nullop && !SvNIOK(vesv)) {
2762 arg = version;
2763 }
2764 else {
2765 OP *pack;
b1cb66bf 2766
2767 if (version->op_type != OP_CONST || !SvNIOK(vesv))
cea2e8a9 2768 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 2769
2770 /* Make copy of id so we don't free it twice */
2771 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2772
2773 /* Fake up a method call to VERSION */
b1cb66bf 2774 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2775 append_elem(OP_LIST,
2776 prepend_elem(OP_LIST, pack, list(version)),
f5d5a27c
CS		 2777 newSVOP(OP_METHOD_NAMED, 0,
2778 newSVpvn("VERSION", 7))));
b1cb66bf 2779 }
2780 }
aeea060c 2781
a0d0e21e 2782 /* Fake up an import/unimport */
4633a7c4
LW		 2783 if (arg && arg->op_type == OP_STUB)
2784 imop = arg; /* no import on explicit () */
b1cb66bf 2785 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2786 imop = Nullop; /* use 5.0; */
2787 }
4633a7c4
LW		 2788 else {
2789 /* Make copy of id so we don't free it twice */
2790 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4 2791 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2792 append_elem(OP_LIST,
2793 prepend_elem(OP_LIST, pack, list(arg)),
f5d5a27c
CS		 2794 newSVOP(OP_METHOD_NAMED, 0,
2795 aver ? newSVpvn("import", 6)
2796 : newSVpvn("unimport", 8))));
4633a7c4
LW		 2797 }
2798
78ca652e
GS		 2799 /* Fake up a require, handle override, if any */
2800 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2801 if (!(gv && GvIMPORTED_CV(gv)))
2802 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2803
2804 if (gv && GvIMPORTED_CV(gv)) {
2805 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2806 append_elem(OP_LIST, id,
2807 scalar(newUNOP(OP_RV2CV, 0,
2808 newGVOP(OP_GV, 0,
2809 gv))))));
2810 }
2811 else {
2812 rqop = newUNOP(OP_REQUIRE, 0, id);
2813 }
a0d0e21e
LW		 2814
2815 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2816 newSUB(floor,
79cb57f6 2817 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 2818 Nullop,
a0d0e21e 2819 append_elem(OP_LINESEQ,
b1cb66bf 2820 append_elem(OP_LINESEQ,
2821 newSTATEOP(0, Nullch, rqop),
2822 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2823 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2824
3280af22
NIS		 2825 PL_copline = NOLINE;
2826 PL_expect = XSTATE;
85e6fe83
LW		 2827}
2828
79072805 2829OP *
864dbfa3 2830Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 2831{
2832 OP *doop;
2833 GV *gv;
2834
2835 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2836 if (!(gv && GvIMPORTED_CV(gv)))
2837 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2838
2839 if (gv && GvIMPORTED_CV(gv)) {
2840 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2841 append_elem(OP_LIST, term,
2842 scalar(newUNOP(OP_RV2CV, 0,
2843 newGVOP(OP_GV, 0,
2844 gv))))));
2845 }
2846 else {
2847 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2848 }
2849 return doop;
2850}
2851
2852OP *
864dbfa3 2853Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 2854{
2855 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2856 list(force_list(subscript)),
2857 list(force_list(listval)) );
79072805
LW		 2858}
2859
76e3520e 2860STATIC I32
cea2e8a9 2861S_list_assignment(pTHX_ register OP *o)
79072805 2862{
11343788 2863 if (!o)
79072805
LW		 2864 return TRUE;
2865
11343788
MB		 2866 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2867 o = cUNOPo->op_first;
79072805 2868
11343788 2869 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 2870 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
2871 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2872
2873 if (t && f)
2874 return TRUE;
2875 if (t || f)
2876 yyerror("Assignment to both a list and a scalar");
2877 return FALSE;
2878 }
2879
11343788
MB		 2880 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2881 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2882 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2883 return TRUE;
2884
11343788 2885 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2886 return TRUE;
2887
11343788 2888 if (o->op_type == OP_RV2SV)
79072805
LW		 2889 return FALSE;
2890
2891 return FALSE;
2892}
2893
2894OP *
864dbfa3 2895Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 2896{
11343788 2897 OP *o;
79072805 2898
a0d0e21e
LW		 2899 if (optype) {
2900 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2901 return newLOGOP(optype, 0,
2902 mod(scalar(left), optype),
2903 newUNOP(OP_SASSIGN, 0, scalar(right)));
2904 }
2905 else {
2906 return newBINOP(optype, OPf_STACKED,
2907 mod(scalar(left), optype), scalar(right));
2908 }
2909 }
2910
79072805 2911 if (list_assignment(left)) {
6ee623d5 2912 dTHR;
3280af22
NIS		 2913 PL_modcount = 0;
2914 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2915 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2916 if (PL_eval_start)
2917 PL_eval_start = 0;
748a9306 2918 else {
a0d0e21e
LW		 2919 op_free(left);
2920 op_free(right);
2921 return Nullop;
2922 }
11343788 2923 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2924 list(force_list(right)),
2925 list(force_list(left)) );
11343788 2926 o->op_private = 0 | (flags >> 8);
a0d0e21e 2927 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2928 OP *curop;
11343788 2929 OP *lastop = o;
3280af22 2930 PL_generation++;
11343788 2931 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 2932 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805
LW		 2933 if (curop->op_type == OP_GV) {
2934 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2935 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2936 break;
3280af22 2937 SvCUR(gv) = PL_generation;
79072805 2938 }
748a9306
LW		 2939 else if (curop->op_type == OP_PADSV ||
2940 curop->op_type == OP_PADAV ||
2941 curop->op_type == OP_PADHV ||
2942 curop->op_type == OP_PADANY) {
3280af22 2943 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2944 SV *sv = svp[curop->op_targ];
3280af22 2945 if (SvCUR(sv) == PL_generation)
748a9306 2946 break;
3280af22 2947 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2948 }
79072805
LW		 2949 else if (curop->op_type == OP_RV2CV)
2950 break;
2951 else if (curop->op_type == OP_RV2SV ||
2952 curop->op_type == OP_RV2AV ||
2953 curop->op_type == OP_RV2HV ||
2954 curop->op_type == OP_RV2GV) {
2955 if (lastop->op_type != OP_GV) /* funny deref? */
2956 break;
2957 }
1167e5da
SM		 2958 else if (curop->op_type == OP_PUSHRE) {
2959 if (((PMOP*)curop)->op_pmreplroot) {
2960 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2961 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2962 break;
3280af22 2963 SvCUR(gv) = PL_generation;
1167e5da
SM		 2964 }
2965 }
79072805
LW		 2966 else
2967 break;
2968 }
2969 lastop = curop;
2970 }
11343788
MB		 2971 if (curop != o)
2972 o->op_private = OPpASSIGN_COMMON;
79072805 2973 }
c07a80fd 2974 if (right && right->op_type == OP_SPLIT) {
2975 OP* tmpop;
2976 if ((tmpop = ((LISTOP*)right)->op_first) &&
2977 tmpop->op_type == OP_PUSHRE)
2978 {
2979 PMOP *pm = (PMOP*)tmpop;
2980 if (left->op_type == OP_RV2AV &&
2981 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2982 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2983 {
2984 tmpop = ((UNOP*)left)->op_first;
2985 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2986 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2987 pm->op_pmflags |= PMf_ONCE;
11343788 2988 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2989 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2990 tmpop->op_sibling = Nullop; /* don't free split */
2991 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2992 op_free(o); /* blow off assign */
54310121 2993 right->op_flags &= ~OPf_WANT;
a5f75d66 2994 /* "I don't know and I don't care." */
c07a80fd 2995 return right;
2996 }
2997 }
2998 else {
3280af22 2999 if (PL_modcount < 10000 &&
c07a80fd 3000 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3001 {
3002 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3003 if (SvIVX(sv) == 0)
3280af22 3004 sv_setiv(sv, PL_modcount+1);
c07a80fd 3005 }
3006 }
3007 }
3008 }
11343788 3009 return o;
79072805
LW		 3010 }
3011 if (!right)
3012 right = newOP(OP_UNDEF, 0);
3013 if (right->op_type == OP_READLINE) {
3014 right->op_flags |= OPf_STACKED;
463ee0b2 3015 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3016 }
a0d0e21e 3017 else {
3280af22 3018 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3019 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3020 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3021 if (PL_eval_start)
3022 PL_eval_start = 0;
748a9306 3023 else {
11343788 3024 op_free(o);
a0d0e21e
LW		 3025 return Nullop;
3026 }
3027 }
11343788 3028 return o;
79072805
LW		 3029}
3030
3031OP *
864dbfa3 3032Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3033{
11343788 3034 dTHR;
bbce6d69 3035 U32 seq = intro_my();
79072805
LW		 3036 register COP *cop;
3037
b7dc083c 3038 NewOp(1101, cop, 1, COP);
3280af22 3039 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 3040 cop->op_type = OP_DBSTATE;
22c35a8c 3041 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3042 }
3043 else {
3044 cop->op_type = OP_NEXTSTATE;
22c35a8c 3045 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3046 }
79072805 3047 cop->op_flags = flags;
a0ed51b3 3048 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 3049#ifdef NATIVE_HINTS
3050 cop->op_private |= NATIVE_HINTS;
3051#endif
e24b16f9 3052 PL_compiling.op_private = cop->op_private;
79072805
LW		 3053 cop->op_next = (OP*)cop;
3054
463ee0b2
LW		 3055 if (label) {
3056 cop->cop_label = label;
3280af22 3057 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3058 }
bbce6d69 3059 cop->cop_seq = seq;
3280af22 3060 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3061 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3062 cop->cop_warnings = PL_curcop->cop_warnings ;
3063 else
3064 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3065
79072805 3066
3280af22
NIS		 3067 if (PL_copline == NOLINE)
3068 cop->cop_line = PL_curcop->cop_line;
79072805 3069 else {
3280af22
NIS		 3070 cop->cop_line = PL_copline;
3071 PL_copline = NOLINE;
79072805 3072 }
3280af22
NIS		 3073 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
3074 cop->cop_stash = PL_curstash;
79072805 3075
3280af22
NIS		 3076 if (PERLDB_LINE && PL_curstash != PL_debstash) {
3077 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
3078 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3079 (void)SvIOK_on(*svp);
a5f75d66 3080 SvIVX(*svp) = 1;
93a17b20
LW		 3081 SvSTASH(*svp) = (HV*)cop;
3082 }
3083 }
3084
11343788 3085 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3086}
3087
bbce6d69 3088/* "Introduce" my variables to visible status. */
3089U32
864dbfa3 3090Perl_intro_my(pTHX)
bbce6d69 3091{
3092 SV **svp;
3093 SV *sv;
3094 I32 i;
3095
3280af22
NIS		 3096 if (! PL_min_intro_pending)
3097 return PL_cop_seqmax;
bbce6d69 3098
3280af22
NIS		 3099 svp = AvARRAY(PL_comppad_name);
3100 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3101 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3102 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3103 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3104 }
3105 }
3280af22
NIS		 3106 PL_min_intro_pending = 0;
3107 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3108 return PL_cop_seqmax++;
bbce6d69 3109}
3110
79072805 3111OP *
864dbfa3 3112Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3113{
883ffac3
CS		 3114 return new_logop(type, flags, &first, &other);
3115}
3116
3bd495df 3117STATIC OP *
cea2e8a9 3118S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3119{
11343788 3120 dTHR;
79072805 3121 LOGOP *logop;
11343788 3122 OP *o;
883ffac3
CS		 3123 OP *first = *firstp;
3124 OP *other = *otherp;
79072805 3125
a0d0e21e
LW		 3126 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3127 return newBINOP(type, flags, scalar(first), scalar(other));
3128
8990e307 3129 scalarboolean(first);
79072805
LW		 3130 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3131 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3132 if (type == OP_AND || type == OP_OR) {
3133 if (type == OP_AND)
3134 type = OP_OR;
3135 else
3136 type = OP_AND;
11343788 3137 o = first;
883ffac3 3138 first = *firstp = cUNOPo->op_first;
11343788
MB		 3139 if (o->op_next)
3140 first->op_next = o->op_next;
3141 cUNOPo->op_first = Nullop;
3142 op_free(o);
79072805
LW		 3143 }
3144 }
3145 if (first->op_type == OP_CONST) {
599cee73 3146 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
cea2e8a9 3147 Perl_warner(aTHX_ WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3148 PL_op_desc[type]);
79072805
LW		 3149 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3150 op_free(first);
883ffac3 3151 *firstp = Nullop;
79072805
LW		 3152 return other;
3153 }
3154 else {
3155 op_free(other);
883ffac3 3156 *otherp = Nullop;
79072805
LW		 3157 return first;
3158 }
3159 }
3160 else if (first->op_type == OP_WANTARRAY) {
3161 if (type == OP_AND)
3162 list(other);
3163 else
3164 scalar(other);
3165 }
599cee73 3166 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3167 OP *k1 = ((UNOP*)first)->op_first;
3168 OP *k2 = k1->op_sibling;
3169 OPCODE warnop = 0;
3170 switch (first->op_type)
3171 {
3172 case OP_NULL:
3173 if (k2 && k2->op_type == OP_READLINE
3174 && (k2->op_flags & OPf_STACKED)
55d729e4 3175 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3176 warnop = k2->op_type;
3177 break;
3178
3179 case OP_SASSIGN:
68dc0745 3180 if (k1->op_type == OP_READDIR
3181 || k1->op_type == OP_GLOB
3182 || k1->op_type == OP_EACH)
a6006777 3183 warnop = k1->op_type;
3184 break;
3185 }
8ebc5c01 3186 if (warnop) {
3280af22
NIS		 3187 line_t oldline = PL_curcop->cop_line;
3188 PL_curcop->cop_line = PL_copline;
cea2e8a9 3189 Perl_warner(aTHX_ WARN_UNSAFE,
599cee73 3190 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3191 PL_op_desc[warnop],
68dc0745 3192 ((warnop == OP_READLINE || warnop == OP_GLOB)
3193 ? " construct" : "() operator"));
3280af22 3194 PL_curcop->cop_line = oldline;
8ebc5c01 3195 }
a6006777 3196 }
79072805
LW		 3197
3198 if (!other)
3199 return first;
3200
a0d0e21e
LW		 3201 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3202 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3203
b7dc083c 3204 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3205
3206 logop->op_type = type;
22c35a8c 3207 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3208 logop->op_first = first;
3209 logop->op_flags = flags | OPf_KIDS;
3210 logop->op_other = LINKLIST(other);
c07a80fd 3211 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3212
3213 /* establish postfix order */
3214 logop->op_next = LINKLIST(first);
3215 first->op_next = (OP*)logop;
3216 first->op_sibling = other;
3217
11343788
MB		 3218 o = newUNOP(OP_NULL, 0, (OP*)logop);
3219 other->op_next = o;
79072805 3220
11343788 3221 return o;
79072805
LW		 3222}
3223
3224OP *
864dbfa3 3225Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3226{
11343788 3227 dTHR;
1a67a97c
SM		 3228 LOGOP *logop;
3229 OP *start;
11343788 3230 OP *o;
79072805 3231
b1cb66bf 3232 if (!falseop)
3233 return newLOGOP(OP_AND, 0, first, trueop);
3234 if (!trueop)
3235 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3236
8990e307 3237 scalarboolean(first);
79072805
LW		 3238 if (first->op_type == OP_CONST) {
3239 if (SvTRUE(((SVOP*)first)->op_sv)) {
3240 op_free(first);
b1cb66bf 3241 op_free(falseop);
3242 return trueop;
79072805
LW		 3243 }
3244 else {
3245 op_free(first);
b1cb66bf 3246 op_free(trueop);
3247 return falseop;
79072805
LW		 3248 }
3249 }
3250 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3251 list(trueop);
3252 scalar(falseop);
79072805 3253 }
1a67a97c
SM		 3254 NewOp(1101, logop, 1, LOGOP);
3255 logop->op_type = OP_COND_EXPR;
3256 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3257 logop->op_first = first;
3258 logop->op_flags = flags | OPf_KIDS;
3259 logop->op_private = 1 | (flags >> 8);
3260 logop->op_other = LINKLIST(trueop);
3261 logop->op_next = LINKLIST(falseop);
79072805 3262
79072805
LW		 3263
3264 /* establish postfix order */
1a67a97c
SM		 3265 start = LINKLIST(first);
3266 first->op_next = (OP*)logop;
79072805 3267
b1cb66bf 3268 first->op_sibling = trueop;
3269 trueop->op_sibling = falseop;
1a67a97c 3270 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3271
1a67a97c 3272 trueop->op_next = falseop->op_next = o;
79072805 3273
1a67a97c 3274 o->op_next = start;
11343788 3275 return o;
79072805
LW		 3276}
3277
3278OP *
864dbfa3 3279Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3280{
b35b2403 3281 dTHR;
1a67a97c 3282 LOGOP *range;
79072805
LW		 3283 OP *flip;
3284 OP *flop;
1a67a97c 3285 OP *leftstart;
11343788 3286 OP *o;
79072805 3287
1a67a97c 3288 NewOp(1101, range, 1, LOGOP);
79072805 3289
1a67a97c
SM		 3290 range->op_type = OP_RANGE;
3291 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3292 range->op_first = left;
3293 range->op_flags = OPf_KIDS;
3294 leftstart = LINKLIST(left);
3295 range->op_other = LINKLIST(right);
3296 range->op_private = 1 | (flags >> 8);
79072805
LW		 3297
3298 left->op_sibling = right;
3299
1a67a97c
SM		 3300 range->op_next = (OP*)range;
3301 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3302 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3303 o = newUNOP(OP_NULL, 0, flop);
79072805 3304 linklist(flop);
1a67a97c 3305 range->op_next = leftstart;
79072805
LW		 3306
3307 left->op_next = flip;
3308 right->op_next = flop;
3309
1a67a97c
SM		 3310 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3311 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3312 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3313 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3314
3315 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3316 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3317
11343788 3318 flip->op_next = o;
79072805 3319 if (!flip->op_private || !flop->op_private)
11343788 3320 linklist(o); /* blow off optimizer unless constant */
79072805 3321
11343788 3322 return o;
79072805
LW		 3323}
3324
3325OP *
864dbfa3 3326Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3327{
11343788 3328 dTHR;
463ee0b2 3329 OP* listop;
11343788 3330 OP* o;
463ee0b2 3331 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3332 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3333
463ee0b2
LW		 3334 if (expr) {
3335 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3336 return block; /* do {} while 0 does once */
fb73857a 3337 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3338 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3339 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3340 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3341 } else if (expr->op_flags & OPf_KIDS) {
3342 OP *k1 = ((UNOP*)expr)->op_first;
3343 OP *k2 = (k1) ? k1->op_sibling : NULL;
3344 switch (expr->op_type) {
3345 case OP_NULL:
3346 if (k2 && k2->op_type == OP_READLINE
3347 && (k2->op_flags & OPf_STACKED)
3348 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3349 expr = newUNOP(OP_DEFINED, 0, expr);
3350 break;
3351
3352 case OP_SASSIGN:
3353 if (k1->op_type == OP_READDIR
3354 || k1->op_type == OP_GLOB
3355 || k1->op_type == OP_EACH)
3356 expr = newUNOP(OP_DEFINED, 0, expr);
3357 break;
3358 }
774d564b 3359 }
463ee0b2 3360 }
93a17b20 3361
8990e307 3362 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3363 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3364
883ffac3
CS		 3365 if (listop)
3366 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3367
11343788
MB		 3368 if (once && o != listop)
3369 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3370
11343788
MB		 3371 if (o == listop)
3372 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3373
11343788
MB		 3374 o->op_flags |= flags;
3375 o = scope(o);
3376 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3377 return o;
79072805
LW		 3378}
3379
3380OP *
864dbfa3 3381Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3382{
11343788 3383 dTHR;
79072805
LW		 3384 OP *redo;
3385 OP *next = 0;
3386 OP *listop;
11343788 3387 OP *o;
79072805
LW		 3388 OP *condop;
3389
fb73857a 3390 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3391 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3392 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3393 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3394 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3395 OP *k1 = ((UNOP*)expr)->op_first;
3396 OP *k2 = (k1) ? k1->op_sibling : NULL;
3397 switch (expr->op_type) {
3398 case OP_NULL:
3399 if (k2 && k2->op_type == OP_READLINE
3400 && (k2->op_flags & OPf_STACKED)
3401 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3402 expr = newUNOP(OP_DEFINED, 0, expr);
3403 break;
3404
3405 case OP_SASSIGN:
3406 if (k1->op_type == OP_READDIR
3407 || k1->op_type == OP_GLOB
3408 || k1->op_type == OP_EACH)
3409 expr = newUNOP(OP_DEFINED, 0, expr);
3410 break;
3411 }
748a9306 3412 }
79072805
LW		 3413
3414 if (!block)
3415 block = newOP(OP_NULL, 0);
3416
3417 if (cont)
3418 next = LINKLIST(cont);
fb73857a 3419 if (expr) {
79072805 3420 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3421 if ((line_t)whileline != NOLINE) {
3280af22 3422 PL_copline = whileline;
fb73857a 3423 cont = append_elem(OP_LINESEQ, cont,
3424 newSTATEOP(0, Nullch, Nullop));
3425 }
3426 }
79072805 3427
463ee0b2 3428 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3429 redo = LINKLIST(listop);
3430
3431 if (expr) {
3280af22 3432 PL_copline = whileline;
883ffac3
CS		 3433 scalar(listop);
3434 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3435 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3436 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3437 op_free((OP*)loop);
883ffac3 3438 return Nullop; /* listop already freed by new_logop */
463ee0b2 3439 }
883ffac3
CS		 3440 if (listop)
3441 ((LISTOP*)listop)->op_last->op_next = condop =
3442 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3443 if (!next)
3444 next = condop;
3445 }
3446 else
11343788 3447 o = listop;
79072805
LW		 3448
3449 if (!loop) {
b7dc083c 3450 NewOp(1101,loop,1,LOOP);
79072805 3451 loop->op_type = OP_ENTERLOOP;
22c35a8c 3452 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3453 loop->op_private = 0;
3454 loop->op_next = (OP*)loop;
3455 }
3456
11343788 3457 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3458
3459 loop->op_redoop = redo;
11343788 3460 loop->op_lastop = o;
79072805
LW		 3461
3462 if (next)
3463 loop->op_nextop = next;
3464 else
11343788 3465 loop->op_nextop = o;
79072805 3466
11343788
MB		 3467 o->op_flags |= flags;
3468 o->op_private |= (flags >> 8);
3469 return o;
79072805
LW		 3470}
3471
3472OP *
864dbfa3 3473Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3474{
3475 LOOP *loop;
b7dc083c 3476 LOOP *tmp;
fb73857a 3477 OP *wop;
85e6fe83 3478 int padoff = 0;
4633a7c4 3479 I32 iterflags = 0;
79072805 3480
79072805 3481 if (sv) {
85e6fe83 3482 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3483 sv->op_type = OP_RV2GV;
22c35a8c 3484 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3485 }
85e6fe83
LW		 3486 else if (sv->op_type == OP_PADSV) { /* private variable */
3487 padoff = sv->op_targ;
3488 op_free(sv);
3489 sv = Nullop;
3490 }
54b9620d
MB		 3491 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3492 padoff = sv->op_targ;
3493 iterflags |= OPf_SPECIAL;
3494 op_free(sv);
3495 sv = Nullop;
3496 }
79072805 3497 else
cea2e8a9 3498 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3499 }
3500 else {
54b9620d
MB		 3501#ifdef USE_THREADS
3502 padoff = find_threadsv("_");
3503 iterflags |= OPf_SPECIAL;
3504#else
3280af22 3505 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3506#endif
79072805 3507 }
5f05dabc 3508 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3509 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3510 iterflags |= OPf_STACKED;
3511 }
89ea2908
GA		 3512 else if (expr->op_type == OP_NULL &&
3513 (expr->op_flags & OPf_KIDS) &&
3514 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3515 {
3516 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3517 * set the STACKED flag to indicate that these values are to be
3518 * treated as min/max values by 'pp_iterinit'.
3519 */
3520 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3521 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3522 OP* left = range->op_first;
3523 OP* right = left->op_sibling;
5152d7c7 3524 LISTOP* listop;
89ea2908
GA		 3525
3526 range->op_flags &= ~OPf_KIDS;
3527 range->op_first = Nullop;
3528
5152d7c7 3529 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3530 listop->op_first->op_next = range->op_next;
3531 left->op_next = range->op_other;
5152d7c7
GS		 3532 right->op_next = (OP*)listop;
3533 listop->op_next = listop->op_first;
89ea2908
GA		 3534
3535 op_free(expr);
5152d7c7 3536 expr = (OP*)(listop);
89ea2908
GA		 3537 null(expr);
3538 iterflags |= OPf_STACKED;
3539 }
3540 else {
3541 expr = mod(force_list(expr), OP_GREPSTART);
3542 }
3543
3544
4633a7c4 3545 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3546 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3547 assert(!loop->op_next);
b7dc083c
NIS		 3548#ifdef PL_OP_SLAB_ALLOC
3549 NewOp(1234,tmp,1,LOOP);
3550 Copy(loop,tmp,1,LOOP);
3551 loop = tmp;
3552#else
85e6fe83 3553 Renew(loop, 1, LOOP);
b7dc083c 3554#endif
85e6fe83 3555 loop->op_targ = padoff;
fb73857a 3556 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3557 PL_copline = forline;
fb73857a 3558 return newSTATEOP(0, label, wop);
79072805
LW		 3559}
3560
8990e307 3561OP*
864dbfa3 3562Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 3563{
11343788
MB		 3564 dTHR;
3565 OP *o;
2d8e6c8d
GS		 3566 STRLEN n_a;
3567
8990e307 3568 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3569 /* "last()" means "last" */
3570 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3571 o = newOP(type, OPf_SPECIAL);
3572 else {
3573 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 3574 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 3575 : ""));
3576 }
8990e307
LW		 3577 op_free(label);
3578 }
3579 else {
a0d0e21e
LW		 3580 if (label->op_type == OP_ENTERSUB)
3581 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3582 o = newUNOP(type, OPf_STACKED, label);
8990e307 3583 }
3280af22 3584 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3585 return o;
8990e307
LW		 3586}
3587
79072805 3588void
864dbfa3 3589Perl_cv_undef(pTHX_ CV *cv)
79072805 3590{
11343788
MB		 3591 dTHR;
3592#ifdef USE_THREADS
e858de61
MB		 3593 if (CvMUTEXP(cv)) {
3594 MUTEX_DESTROY(CvMUTEXP(cv));
3595 Safefree(CvMUTEXP(cv));
3596 CvMUTEXP(cv) = 0;
3597 }
11343788
MB		 3598#endif /* USE_THREADS */
3599
a0d0e21e 3600 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3601#ifdef USE_THREADS
3602 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 3603 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3604#else
a0d0e21e 3605 if (CvDEPTH(cv))
cea2e8a9 3606 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 3607#endif /* USE_THREADS */
8990e307 3608 ENTER;
a0d0e21e 3609
3280af22
NIS		 3610 SAVESPTR(PL_curpad);
3611 PL_curpad = 0;
a0d0e21e 3612
a5f75d66 3613 if (!CvCLONED(cv))
748a9306 3614 op_free(CvROOT(cv));
79072805 3615 CvROOT(cv) = Nullop;
8990e307 3616 LEAVE;
79072805 3617 }
1d5db326 3618 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3619 CvFLAGS(cv) = 0;
8e07c86e
AD		 3620 SvREFCNT_dec(CvGV(cv));
3621 CvGV(cv) = Nullgv;
3622 SvREFCNT_dec(CvOUTSIDE(cv));
3623 CvOUTSIDE(cv) = Nullcv;
3624 if (CvPADLIST(cv)) {
8ebc5c01 3625 /* may be during global destruction */
3626 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3627 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3628 while (i >= 0) {
3629 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3630 SV* sv = svp ? *svp : Nullsv;
3631 if (!sv)
3632 continue;
3280af22
NIS		 3633 if (sv == (SV*)PL_comppad_name)
3634 PL_comppad_name = Nullav;
3635 else if (sv == (SV*)PL_comppad) {
3636 PL_comppad = Nullav;
3637 PL_curpad = Null(SV**);
46fc3d4c 3638 }
3639 SvREFCNT_dec(sv);
8ebc5c01 3640 }
3641 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3642 }
8e07c86e
AD		 3643 CvPADLIST(cv) = Nullav;
3644 }
79072805
LW		 3645}
3646
5f05dabc 3647#ifdef DEBUG_CLOSURES
76e3520e 3648STATIC void
ba106d47 3649cv_dump(CV *cv)
5f05dabc 3650{
3651 CV *outside = CvOUTSIDE(cv);
3652 AV* padlist = CvPADLIST(cv);
4fdae800 3653 AV* pad_name;
3654 AV* pad;
3655 SV** pname;
3656 SV** ppad;
5f05dabc 3657 I32 ix;
3658
fb73857a 3659 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3660 cv,
3661 (CvANON(cv) ? "ANON"
6b88bc9c 3662 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3663 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3664 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3665 outside,
3666 (!outside ? "null"
3667 : CvANON(outside) ? "ANON"
6b88bc9c 3668 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3669 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3670 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3671
4fdae800 3672 if (!padlist)
3673 return;
3674
3675 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3676 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3677 pname = AvARRAY(pad_name);
3678 ppad = AvARRAY(pad);
3679
93965878 3680 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3681 if (SvPOK(pname[ix]))
fb73857a 3682 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3683 ix, ppad[ix],
3684 SvFAKE(pname[ix]) ? "FAKE " : "",
3685 SvPVX(pname[ix]),
ab50184a
CS		 3686 (long)I_32(SvNVX(pname[ix])),
3687 (long)SvIVX(pname[ix]));
5f05dabc 3688 }
3689}
3690#endif /* DEBUG_CLOSURES */
3691
76e3520e 3692STATIC CV *
cea2e8a9 3693S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 3694{
11343788 3695 dTHR;
748a9306
LW		 3696 AV* av;
3697 I32 ix;
3698 AV* protopadlist = CvPADLIST(proto);
3699 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3700 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3701 SV** pname = AvARRAY(protopad_name);
3702 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3703 I32 fname = AvFILLp(protopad_name);
3704 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3705 AV* comppadlist;
3706 CV* cv;
3707
07055b4c
CS		 3708 assert(!CvUNIQUE(proto));
3709
748a9306 3710 ENTER;
3280af22
NIS		 3711 SAVESPTR(PL_curpad);
3712 SAVESPTR(PL_comppad);
3713 SAVESPTR(PL_comppad_name);
3714 SAVESPTR(PL_compcv);
748a9306 3715
3280af22 3716 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3717 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3718 CvCLONED_on(cv);
5f05dabc 3719 if (CvANON(proto))
3720 CvANON_on(cv);
748a9306 3721
11343788 3722#ifdef USE_THREADS
12ca11f6 3723 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3724 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3725 CvOWNER(cv) = 0;
3726#endif /* USE_THREADS */
748a9306 3727 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3728 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3729 CvSTASH(cv) = CvSTASH(proto);
3730 CvROOT(cv) = CvROOT(proto);
3731 CvSTART(cv) = CvSTART(proto);
5f05dabc 3732 if (outside)
3733 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3734
68dc0745 3735 if (SvPOK(proto))
3736 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3737
3280af22 3738 PL_comppad_name = newAV();
46fc3d4c 3739 for (ix = fname; ix >= 0; ix--)
3280af22 3740 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3741
3280af22 3742 PL_comppad = newAV();
748a9306
LW		 3743
3744 comppadlist = newAV();
3745 AvREAL_off(comppadlist);
3280af22
NIS		 3746 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3747 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3748 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3749 av_fill(PL_comppad, AvFILLp(protopad));
3750 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3751
3752 av = newAV(); /* will be @_ */
3753 av_extend(av, 0);
3280af22 3754 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3755 AvFLAGS(av) = AVf_REIFY;
3756
9607fc9c 3757 for (ix = fpad; ix > 0; ix--) {
3758 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3759 if (namesv && namesv != &PL_sv_undef) {
aa689395 3760 char *name = SvPVX(namesv); /* XXX */
3761 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3762 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 3763 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 3764 if (!off)
3280af22 3765 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3766 else if (off != ix)
cea2e8a9 3767 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 3768 }
3769 else { /* our own lexical */
aa689395 3770 SV* sv;
5f05dabc 3771 if (*name == '&') {
3772 /* anon code -- we'll come back for it */
3773 sv = SvREFCNT_inc(ppad[ix]);
3774 }
3775 else if (*name == '@')
3776 sv = (SV*)newAV();
748a9306 3777 else if (*name == '%')
5f05dabc 3778 sv = (SV*)newHV();
748a9306 3779 else
5f05dabc 3780 sv = NEWSV(0,0);
3781 if (!SvPADBUSY(sv))
3782 SvPADMY_on(sv);
3280af22 3783 PL_curpad[ix] = sv;
748a9306
LW		 3784 }
3785 }
3786 else {
aa689395 3787 SV* sv = NEWSV(0,0);
748a9306 3788 SvPADTMP_on(sv);
3280af22 3789 PL_curpad[ix] = sv;
748a9306
LW		 3790 }
3791 }
3792
5f05dabc 3793 /* Now that vars are all in place, clone nested closures. */
3794
9607fc9c 3795 for (ix = fpad; ix > 0; ix--) {
3796 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3797 if (namesv
3280af22 3798 && namesv != &PL_sv_undef
aa689395 3799 && !(SvFLAGS(namesv) & SVf_FAKE)
3800 && *SvPVX(namesv) == '&'
5f05dabc 3801 && CvCLONE(ppad[ix]))
3802 {
3803 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3804 SvREFCNT_dec(ppad[ix]);
3805 CvCLONE_on(kid);
3806 SvPADMY_on(kid);
3280af22 3807 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3808 }
3809 }
3810
5f05dabc 3811#ifdef DEBUG_CLOSURES
ab50184a
CS		 3812 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3813 cv_dump(outside);
3814 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3815 cv_dump(proto);
ab50184a 3816 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3817 cv_dump(cv);
3818#endif
3819
748a9306
LW		 3820 LEAVE;
3821 return cv;
3822}
3823
3824CV *
864dbfa3 3825Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 3826{
b099ddc0
GS		 3827 CV *cv;
3828 MUTEX_LOCK(&PL_cred_mutex); /* XXX create separate mutex */
3829 cv = cv_clone2(proto, CvOUTSIDE(proto));
3830 MUTEX_UNLOCK(&PL_cred_mutex); /* XXX create separate mutex */
3831 return cv;
5f05dabc 3832}
3833
3fe9a6f1 3834void
864dbfa3 3835Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 3836{
0453d815
PM		 3837 dTHR;
3838
f248d071 3839 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_UNSAFE)) {
46fc3d4c 3840 SV* msg = sv_newmortal();
3fe9a6f1 3841 SV* name = Nullsv;
3842
3843 if (gv)
46fc3d4c 3844 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3845 sv_setpv(msg, "Prototype mismatch:");
3846 if (name)
cea2e8a9 3847 Perl_sv_catpvf(aTHX_ msg, " sub %_", name);
3fe9a6f1 3848 if (SvPOK(cv))
cea2e8a9 3849 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 3850 sv_catpv(msg, " vs ");
3851 if (p)
cea2e8a9 3852 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 3853 else
3854 sv_catpv(msg, "none");
0453d815 3855 Perl_warner(aTHX_ WARN_UNSAFE, "%_", msg);
3fe9a6f1 3856 }
3857}
3858
760ac839 3859SV *
864dbfa3 3860Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 3861{
54310121 3862 if (!cv || !SvPOK(cv) || SvCUR(cv))
3863 return Nullsv;
fe5e78ed
GS		 3864 return op_const_sv(CvSTART(cv), cv);
3865}
760ac839 3866
fe5e78ed 3867SV *
864dbfa3 3868Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 3869{
3870 SV *sv = Nullsv;
3871
3872 if(!o)
3873 return Nullsv;
3874
3875 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3876 o = cLISTOPo->op_first->op_sibling;
3877
3878 for (; o; o = o->op_next) {
54310121 3879 OPCODE type = o->op_type;
fe5e78ed 3880
acb36ea4 3881 if (sv && o->op_next == o)
fe5e78ed 3882 return sv;
54310121 3883 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3884 continue;
3885 if (type == OP_LEAVESUB || type == OP_RETURN)
3886 break;
3887 if (sv)
3888 return Nullsv;
3889 if (type == OP_CONST)
5dc0d613 3890 sv = cSVOPo->op_sv;
fe5e78ed 3891 else if (type == OP_PADSV && cv) {
e858de61
MB		 3892 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3893 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3894 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3895 return Nullsv;
760ac839 3896 }
54310121 3897 else
3898 return Nullsv;
760ac839 3899 }
5aabfad6 3900 if (sv)
3901 SvREADONLY_on(sv);
760ac839
LW		 3902 return sv;
3903}
3904
748a9306 3905CV *
864dbfa3 3906Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 3907{
11343788 3908 dTHR;
2d8e6c8d
GS		 3909 STRLEN n_a;
3910 char *name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
55d729e4
GS		 3911 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3912 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
2d8e6c8d 3913 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 3914 register CV *cv=0;
a0d0e21e 3915 I32 ix;
79072805 3916
11343788 3917 if (o)
5dc0d613 3918 SAVEFREEOP(o);
3fe9a6f1 3919 if (proto)
3920 SAVEFREEOP(proto);
3921
55d729e4
GS		 3922 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3923 maximum a prototype before. */
3924 if (SvTYPE(gv) > SVt_NULL) {
0453d815 3925 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
f248d071
GS		 3926 && ckWARN_d(WARN_UNSAFE))
3927 {
0453d815 3928 Perl_warner(aTHX_ WARN_UNSAFE, "Runaway prototype");
f248d071 3929 }
55d729e4
GS		 3930 cv_ckproto((CV*)gv, NULL, ps);
3931 }
3932 if (ps)
3933 sv_setpv((SV*)gv, ps);
3934 else
3935 sv_setiv((SV*)gv, -1);
3280af22
NIS		 3936 SvREFCNT_dec(PL_compcv);
3937 cv = PL_compcv = NULL;
3938 PL_sub_generation++;
55d729e4
GS		 3939 goto noblock;
3940 }
3941
68dc0745 3942 if (!name || GvCVGEN(gv))
3943 cv = Nullcv;
3944 else if (cv = GvCV(gv)) {
3fe9a6f1 3945 cv_ckproto(cv, gv, ps);
68dc0745 3946 /* already defined (or promised)? */
3947 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3948 SV* const_sv;
fe5e78ed 3949 bool const_changed = TRUE;
aa689395 3950 if (!block) {
3951 /* just a "sub foo;" when &foo is already defined */
3280af22 3952 SAVEFREESV(PL_compcv);
aa689395 3953 goto done;
3954 }
7bac28a0 3955 /* ahem, death to those who redefine active sort subs */
3280af22 3956 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 3957 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3958 if(const_sv = cv_const_sv(cv))
3959 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 3960 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
3961 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3962 && HvNAME(GvSTASH(CvGV(cv)))
3963 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3964 "autouse"))) {
3280af22
NIS		 3965 line_t oldline = PL_curcop->cop_line;
3966 PL_curcop->cop_line = PL_copline;
cea2e8a9 3967 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73
PM		 3968 const_sv ? "Constant subroutine %s redefined"
3969 : "Subroutine %s redefined", name);
3280af22 3970 PL_curcop->cop_line = oldline;
79072805 3971 }
8990e307 3972 SvREFCNT_dec(cv);
68dc0745 3973 cv = Nullcv;
79072805
LW		 3974 }
3975 }
a0d0e21e 3976 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3977 cv_undef(cv);
3280af22
NIS		 3978 CvFLAGS(cv) = CvFLAGS(PL_compcv);
3979 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
3980 CvOUTSIDE(PL_compcv) = 0;
3981 CvPADLIST(cv) = CvPADLIST(PL_compcv);
3982 CvPADLIST(PL_compcv) = 0;
3983 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
3984 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
3985 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 3986 }
3987 else {
3280af22 3988 cv = PL_compcv;
44a8e56a 3989 if (name) {
3990 GvCV(gv) = cv;
3991 GvCVGEN(gv) = 0;
3280af22 3992 PL_sub_generation++;
44a8e56a 3993 }
a0d0e21e 3994 }
44a8e56a 3995 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 3996 CvFILEGV(cv) = PL_curcop->cop_filegv;
3997 CvSTASH(cv) = PL_curstash;
11343788
MB		 3998#ifdef USE_THREADS
3999 CvOWNER(cv) = 0;
1cfa4ec7 4000 if (!CvMUTEXP(cv)) {
f6aaf501 4001 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4002 MUTEX_INIT(CvMUTEXP(cv));
4003 }
11343788 4004#endif /* USE_THREADS */
8990e307 4005
3fe9a6f1 4006 if (ps)
4007 sv_setpv((SV*)cv, ps);
4633a7c4 4008
3280af22 4009 if (PL_error_count) {
c07a80fd 4010 op_free(block);
4011 block = Nullop;
68dc0745 4012 if (name) {
4013 char *s = strrchr(name, ':');
4014 s = s ? s+1 : name;
6d4c2119
CS		 4015 if (strEQ(s, "BEGIN")) {
4016 char *not_safe =
4017 "BEGIN not safe after errors--compilation aborted";
faef0170 4018 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4019 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4020 else {
4021 /* force display of errors found but not reported */
38a03e6e 4022 sv_catpv(ERRSV, not_safe);
cea2e8a9 4023 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4024 }
4025 }
68dc0745 4026 }
c07a80fd 4027 }
a0d0e21e 4028 if (!block) {
55d729e4 4029 noblock:
3280af22 4030 PL_copline = NOLINE;
a0d0e21e
LW		 4031 LEAVE_SCOPE(floor);
4032 return cv;
4033 }
4034
3280af22
NIS		 4035 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4036 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4037
54310121 4038 if (CvCLONE(cv)) {
3280af22
NIS		 4039 SV **namep = AvARRAY(PL_comppad_name);
4040 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4041 SV *namesv;
4042
3280af22 4043 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4044 continue;
4045 /*
4046 * The only things that a clonable function needs in its
4047 * pad are references to outer lexicals and anonymous subs.
4048 * The rest are created anew during cloning.
4049 */
4050 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4051 namesv != &PL_sv_undef &&
54310121 4052 (SvFAKE(namesv) ||
4053 *SvPVX(namesv) == '&')))
4054 {
3280af22
NIS		 4055 SvREFCNT_dec(PL_curpad[ix]);
4056 PL_curpad[ix] = Nullsv;
54310121 4057 }
4058 }
a0d0e21e 4059 }
54310121 4060 else {
4061 AV *av = newAV(); /* Will be @_ */
4062 av_extend(av, 0);
3280af22 4063 av_store(PL_comppad, 0, (SV*)av);
54310121 4064 AvFLAGS(av) = AVf_REIFY;
79072805 4065
3280af22
NIS		 4066 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4067 if (SvIMMORTAL(PL_curpad[ix]))
54310121 4068 continue;
3280af22
NIS		 4069 if (!SvPADMY(PL_curpad[ix]))
4070 SvPADTMP_on(PL_curpad[ix]);
54310121 4071 }
4072 }
79072805 4073
a0d0e21e 4074 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 4075 CvSTART(cv) = LINKLIST(CvROOT(cv));
4076 CvROOT(cv)->op_next = 0;
4077 peep(CvSTART(cv));
93a17b20 4078
44a8e56a 4079 if (name) {
4080 char *s;
4081
3280af22 4082 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4083 SV *sv = NEWSV(0,0);
44a8e56a 4084 SV *tmpstr = sv_newmortal();
549bb64a 4085 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 4086 CV *cv;
4087 HV *hv;
4088
cea2e8a9 4089 Perl_sv_setpvf(aTHX_ sv, "%_:%ld-%ld",
3280af22
NIS		 4090 GvSV(PL_curcop->cop_filegv),
4091 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 4092 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4093 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4094 hv = GvHVn(db_postponed);
9607fc9c 4095 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
4096 && (cv = GvCV(db_postponed))) {
44a8e56a 4097 dSP;
924508f0 4098 PUSHMARK(SP);
44a8e56a 4099 XPUSHs(tmpstr);
4100 PUTBACK;
864dbfa3 4101 call_sv((SV*)cv, G_DISCARD);
44a8e56a 4102 }
4103 }
79072805 4104
44a8e56a 4105 if ((s = strrchr(name,':')))
28757baa 4106 s++;
4107 else
4108 s = name;
68dc0745 4109 if (strEQ(s, "BEGIN")) {
3280af22 4110 I32 oldscope = PL_scopestack_ix;
28757baa 4111 ENTER;
3280af22
NIS		 4112 SAVESPTR(PL_compiling.cop_filegv);
4113 SAVEI16(PL_compiling.cop_line);
4114 save_svref(&PL_rs);
4115 sv_setsv(PL_rs, PL_nrs);
28757baa 4116
3280af22
NIS		 4117 if (!PL_beginav)
4118 PL_beginav = newAV();
28757baa 4119 DEBUG_x( dump_sub(gv) );
3280af22 4120 av_push(PL_beginav, (SV *)cv);
28757baa 4121 GvCV(gv) = 0;
3280af22 4122 call_list(oldscope, PL_beginav);
a6006777 4123
3280af22 4124 PL_curcop = &PL_compiling;
a0ed51b3 4125 PL_compiling.op_private = PL_hints;
28757baa 4126 LEAVE;
4127 }
3280af22
NIS		 4128 else if (strEQ(s, "END") && !PL_error_count) {
4129 if (!PL_endav)
4130 PL_endav = newAV();
4131 av_unshift(PL_endav, 1);
4132 av_store(PL_endav, 0, (SV *)cv);
28757baa 4133 GvCV(gv) = 0;
4134 }
3280af22
NIS		 4135 else if (strEQ(s, "INIT") && !PL_error_count) {
4136 if (!PL_initav)
4137 PL_initav = newAV();
4138 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4139 GvCV(gv) = 0;
ae77835f 4140 }
79072805 4141 }
a6006777 4142
aa689395 4143 done:
3280af22 4144 PL_copline = NOLINE;
8990e307 4145 LEAVE_SCOPE(floor);
a0d0e21e 4146 return cv;
79072805
LW		 4147}
4148
b099ddc0 4149/* XXX unsafe for threads if eval_owner isn't held */
5476c433 4150void
864dbfa3 4151Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4152{
4153 dTHR;
3280af22
NIS		 4154 U32 oldhints = PL_hints;
4155 HV *old_cop_stash = PL_curcop->cop_stash;
4156 HV *old_curstash = PL_curstash;
4157 line_t oldline = PL_curcop->cop_line;
4158 PL_curcop->cop_line = PL_copline;
5476c433 4159
3280af22 4160 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4161 if(stash)
3280af22 4162 PL_curstash = PL_curcop->cop_stash = stash;
5476c433
JD		 4163
4164 newSUB(
be24f278 4165 start_subparse(FALSE, 0),
5476c433 4166 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4167 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
5476c433
JD		 4168 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4169 );
4170
3280af22
NIS		 4171 PL_hints = oldhints;
4172 PL_curcop->cop_stash = old_cop_stash;
4173 PL_curstash = old_curstash;
4174 PL_curcop->cop_line = oldline;
5476c433
JD		 4175}
4176
57d3b86d 4177CV *
864dbfa3 4178Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4179{
11343788 4180 dTHR;
44a8e56a 4181 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4182 register CV *cv;
44a8e56a 4183
4184 if (cv = (name ? GvCV(gv) : Nullcv)) {
4185 if (GvCVGEN(gv)) {
4186 /* just a cached method */
4187 SvREFCNT_dec(cv);
4188 cv = 0;
4189 }
4190 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4191 /* already defined (or promised) */
599cee73 4192 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4193 && HvNAME(GvSTASH(CvGV(cv)))
4194 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4195 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4196 if (PL_copline != NOLINE)
4197 PL_curcop->cop_line = PL_copline;
cea2e8a9 4198 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4199 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4200 }
4201 SvREFCNT_dec(cv);
4202 cv = 0;
79072805 4203 }
79072805 4204 }
44a8e56a 4205
4206 if (cv) /* must reuse cv if autoloaded */
4207 cv_undef(cv);
a0d0e21e
LW		 4208 else {
4209 cv = (CV*)NEWSV(1105,0);
4210 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4211 if (name) {
4212 GvCV(gv) = cv;
4213 GvCVGEN(gv) = 0;
3280af22 4214 PL_sub_generation++;
44a8e56a 4215 }
a0d0e21e 4216 }
5196be3e 4217 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4218#ifdef USE_THREADS
12ca11f6 4219 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4220 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4221 CvOWNER(cv) = 0;
4222#endif /* USE_THREADS */
79072805 4223 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4224 CvXSUB(cv) = subaddr;
44a8e56a 4225
28757baa 4226 if (name) {
4227 char *s = strrchr(name,':');
4228 if (s)
4229 s++;
4230 else
4231 s = name;
4232 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4233 if (!PL_beginav)
4234 PL_beginav = newAV();
4235 av_push(PL_beginav, (SV *)cv);
44a8e56a 4236 GvCV(gv) = 0;
28757baa 4237 }
4238 else if (strEQ(s, "END")) {
3280af22
NIS		 4239 if (!PL_endav)
4240 PL_endav = newAV();
4241 av_unshift(PL_endav, 1);
4242 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4243 GvCV(gv) = 0;
28757baa 4244 }
7d07dbc2 4245 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4246 if (!PL_initav)
4247 PL_initav = newAV();
4248 av_push(PL_initav, (SV *)cv);
f8f842e4 4249 GvCV(gv) = 0;
ae77835f 4250 }
28757baa 4251 }
8990e307 4252 else
a5f75d66 4253 CvANON_on(cv);
44a8e56a 4254
a0d0e21e 4255 return cv;
79072805
LW		 4256}
4257
4258void
864dbfa3 4259Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4260{
11343788 4261 dTHR;
79072805
LW		 4262 register CV *cv;
4263 char *name;
4264 GV *gv;
a0d0e21e 4265 I32 ix;
2d8e6c8d 4266 STRLEN n_a;
79072805 4267
11343788 4268 if (o)
2d8e6c8d 4269 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4270 else
4271 name = "STDOUT";
85e6fe83 4272 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4273 GvMULTI_on(gv);
79072805 4274 if (cv = GvFORM(gv)) {
599cee73 4275 if (ckWARN(WARN_REDEFINE)) {
3280af22 4276 line_t oldline = PL_curcop->cop_line;
79072805 4277
3280af22 4278 PL_curcop->cop_line = PL_copline;
cea2e8a9 4279 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
3280af22 4280 PL_curcop->cop_line = oldline;
79072805 4281 }
8990e307 4282 SvREFCNT_dec(cv);
79072805 4283 }
3280af22 4284 cv = PL_compcv;
79072805 4285 GvFORM(gv) = cv;
44a8e56a 4286 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4287 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4288
3280af22
NIS		 4289 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4290 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4291 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4292 }
4293
79072805
LW		 4294 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4295 CvSTART(cv) = LINKLIST(CvROOT(cv));
4296 CvROOT(cv)->op_next = 0;
4297 peep(CvSTART(cv));
11343788 4298 op_free(o);
3280af22 4299 PL_copline = NOLINE;
8990e307 4300 LEAVE_SCOPE(floor);
79072805
LW		 4301}
4302
4303OP *
864dbfa3 4304Perl_newANONLIST(pTHX_ OP *o)
79072805 4305{
93a17b20 4306 return newUNOP(OP_REFGEN, 0,
11343788 4307 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4308}
4309
4310OP *
864dbfa3 4311Perl_newANONHASH(pTHX_ OP *o)
79072805 4312{
93a17b20 4313 return newUNOP(OP_REFGEN, 0,
11343788 4314 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4315}
4316
4317OP *
864dbfa3 4318Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 4319{
4320 return newUNOP(OP_REFGEN, 0,
4633a7c4 4321 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 4322}
4323
4324OP *
864dbfa3 4325Perl_oopsAV(pTHX_ OP *o)
79072805 4326{
ed6116ce
LW		 4327 switch (o->op_type) {
4328 case OP_PADSV:
4329 o->op_type = OP_PADAV;
22c35a8c 4330 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4331 return ref(o, OP_RV2AV);
ed6116ce
LW		 4332
4333 case OP_RV2SV:
79072805 4334 o->op_type = OP_RV2AV;
22c35a8c 4335 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4336 ref(o, OP_RV2AV);
ed6116ce
LW		 4337 break;
4338
4339 default:
0453d815
PM		 4340 if (ckWARN_d(WARN_INTERNAL))
4341 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4342 break;
4343 }
79072805
LW		 4344 return o;
4345}
4346
4347OP *
864dbfa3 4348Perl_oopsHV(pTHX_ OP *o)
79072805 4349{
0453d815 4350 dTHR;
0453d815 4351
ed6116ce
LW		 4352 switch (o->op_type) {
4353 case OP_PADSV:
4354 case OP_PADAV:
4355 o->op_type = OP_PADHV;
22c35a8c 4356 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4357 return ref(o, OP_RV2HV);
ed6116ce
LW		 4358
4359 case OP_RV2SV:
4360 case OP_RV2AV:
79072805 4361 o->op_type = OP_RV2HV;
22c35a8c 4362 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4363 ref(o, OP_RV2HV);
ed6116ce
LW		 4364 break;
4365
4366 default:
0453d815
PM		 4367 if (ckWARN_d(WARN_INTERNAL))
4368 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4369 break;
4370 }
79072805
LW		 4371 return o;
4372}
4373
4374OP *
864dbfa3 4375Perl_newAVREF(pTHX_ OP *o)
79072805 4376{
ed6116ce
LW		 4377 if (o->op_type == OP_PADANY) {
4378 o->op_type = OP_PADAV;
22c35a8c 4379 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4380 return o;
ed6116ce 4381 }
79072805
LW		 4382 return newUNOP(OP_RV2AV, 0, scalar(o));
4383}
4384
4385OP *
864dbfa3 4386Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4387{
82092f1d 4388 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4389 return newUNOP(OP_NULL, 0, o);
748a9306 4390 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4391}
4392
4393OP *
864dbfa3 4394Perl_newHVREF(pTHX_ OP *o)
79072805 4395{
ed6116ce
LW		 4396 if (o->op_type == OP_PADANY) {
4397 o->op_type = OP_PADHV;
22c35a8c 4398 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4399 return o;
ed6116ce 4400 }
79072805
LW		 4401 return newUNOP(OP_RV2HV, 0, scalar(o));
4402}
4403
4404OP *
864dbfa3 4405Perl_oopsCV(pTHX_ OP *o)
79072805 4406{
cea2e8a9 4407 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 4408 /* STUB */
4409 return o;
4410}
4411
4412OP *
864dbfa3 4413Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 4414{
c07a80fd 4415 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4416}
4417
4418OP *
864dbfa3 4419Perl_newSVREF(pTHX_ OP *o)
79072805 4420{
ed6116ce
LW		 4421 if (o->op_type == OP_PADANY) {
4422 o->op_type = OP_PADSV;
22c35a8c 4423 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4424 return o;
ed6116ce 4425 }
224a4551
MB		 4426 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4427 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4428 return o;
224a4551 4429 }
79072805
LW		 4430 return newUNOP(OP_RV2SV, 0, scalar(o));
4431}
4432
4433/* Check routines. */
4434
4435OP *
cea2e8a9 4436Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 4437{
178c6305
CS		 4438 PADOFFSET ix;
4439 SV* name;
4440
4441 name = NEWSV(1106,0);
4442 sv_upgrade(name, SVt_PVNV);
4443 sv_setpvn(name, "&", 1);
4444 SvIVX(name) = -1;
4445 SvNVX(name) = 1;
5dc0d613 4446 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4447 av_store(PL_comppad_name, ix, name);
4448 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4449 SvPADMY_on(cSVOPo->op_sv);
4450 cSVOPo->op_sv = Nullsv;
4451 cSVOPo->op_targ = ix;
4452 return o;
5f05dabc 4453}
4454
4455OP *
cea2e8a9 4456Perl_ck_bitop(pTHX_ OP *o)
55497cff 4457{
3280af22 4458 o->op_private = PL_hints;
5dc0d613 4459 return o;
55497cff 4460}
4461
4462OP *
cea2e8a9 4463Perl_ck_concat(pTHX_ OP *o)
79072805 4464{
11343788
MB		 4465 if (cUNOPo->op_first->op_type == OP_CONCAT)
4466 o->op_flags |= OPf_STACKED;
4467 return o;
79072805
LW		 4468}
4469
4470OP *
cea2e8a9 4471Perl_ck_spair(pTHX_ OP *o)
79072805 4472{
11343788 4473 if (o->op_flags & OPf_KIDS) {
79072805 4474 OP* newop;
a0d0e21e 4475 OP* kid;
5dc0d613
MB		 4476 OPCODE type = o->op_type;
4477 o = modkids(ck_fun(o), type);
11343788 4478 kid = cUNOPo->op_first;
a0d0e21e
LW		 4479 newop = kUNOP->op_first->op_sibling;
4480 if (newop &&
4481 (newop->op_sibling ||
22c35a8c 4482 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4483 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4484 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4485
11343788 4486 return o;
a0d0e21e
LW		 4487 }
4488 op_free(kUNOP->op_first);
4489 kUNOP->op_first = newop;
4490 }
22c35a8c 4491 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4492 return ck_fun(o);
a0d0e21e
LW		 4493}
4494
4495OP *
cea2e8a9 4496Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 4497{
11343788 4498 o = ck_fun(o);
5dc0d613 4499 o->op_private = 0;
11343788
MB		 4500 if (o->op_flags & OPf_KIDS) {
4501 OP *kid = cUNOPo->op_first;
5f05dabc 4502 if (kid->op_type == OP_HSLICE)
5dc0d613 4503 o->op_private |= OPpSLICE;
5f05dabc 4504 else if (kid->op_type != OP_HELEM)
cea2e8a9 4505 Perl_croak(aTHX_ "%s argument is not a HASH element or slice",
22c35a8c 4506 PL_op_desc[o->op_type]);
a0d0e21e 4507 null(kid);
79072805 4508 }
11343788 4509 return o;
79072805
LW		 4510}
4511
4512OP *
cea2e8a9 4513Perl_ck_eof(pTHX_ OP *o)
79072805 4514{
11343788 4515 I32 type = o->op_type;
79072805 4516
11343788
MB		 4517 if (o->op_flags & OPf_KIDS) {
4518 if (cLISTOPo->op_first->op_type == OP_STUB) {
4519 op_free(o);
4520 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4521 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4522 }
11343788 4523 return ck_fun(o);
79072805 4524 }
11343788 4525 return o;
79072805
LW		 4526}
4527
4528OP *
cea2e8a9 4529Perl_ck_eval(pTHX_ OP *o)
79072805 4530{
3280af22 4531 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4532 if (o->op_flags & OPf_KIDS) {
4533 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4534
93a17b20 4535 if (!kid) {
11343788
MB		 4536 o->op_flags &= ~OPf_KIDS;
4537 null(o);
79072805
LW		 4538 }
4539 else if (kid->op_type == OP_LINESEQ) {
4540 LOGOP *enter;
4541
11343788
MB		 4542 kid->op_next = o->op_next;
4543 cUNOPo->op_first = 0;
4544 op_free(o);
79072805 4545
b7dc083c 4546 NewOp(1101, enter, 1, LOGOP);
79072805 4547 enter->op_type = OP_ENTERTRY;
22c35a8c 4548 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4549 enter->op_private = 0;
4550
4551 /* establish postfix order */
4552 enter->op_next = (OP*)enter;
4553
11343788
MB		 4554 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4555 o->op_type = OP_LEAVETRY;
22c35a8c 4556 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4557 enter->op_other = o;
4558 return o;
79072805 4559 }
c7cc6f1c 4560 else
473986ff 4561 scalar((OP*)kid);
79072805
LW		 4562 }
4563 else {
11343788 4564 op_free(o);
54b9620d 4565 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4566 }
3280af22 4567 o->op_targ = (PADOFFSET)PL_hints;
11343788 4568 return o;
79072805
LW		 4569}
4570
4571OP *
cea2e8a9 4572Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 4573{
4574 OP *kid;
11343788
MB		 4575 if (o->op_flags & OPf_STACKED) {
4576 o = ck_fun(o);
4577 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4578 if (kid->op_type == OP_RV2GV)
4579 null(kid);
79072805 4580 }
463ee0b2 4581 else
11343788
MB		 4582 o = listkids(o);
4583 return o;
79072805
LW		 4584}
4585
4586OP *
cea2e8a9 4587Perl_ck_exists(pTHX_ OP *o)
5f05dabc 4588{
5196be3e
MB		 4589 o = ck_fun(o);
4590 if (o->op_flags & OPf_KIDS) {
4591 OP *kid = cUNOPo->op_first;
5f05dabc 4592 if (kid->op_type != OP_HELEM)
cea2e8a9 4593 Perl_croak(aTHX_ "%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4594 null(kid);
4595 }
5196be3e 4596 return o;
5f05dabc 4597}
4598
22c35a8c 4599#if 0
5f05dabc 4600OP *
cea2e8a9 4601Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 4602{
4603 o = fold_constants(o);
4604 if (o->op_type == OP_CONST)
4605 o->op_type = OP_GV;
4606 return o;
4607}
22c35a8c 4608#endif
79072805
LW		 4609
4610OP *
cea2e8a9 4611Perl_ck_rvconst(pTHX_ register OP *o)
79072805 4612{
11343788
MB		 4613 dTHR;
4614 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4615
3280af22 4616 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4617 if (kid->op_type == OP_CONST) {
44a8e56a 4618 char *name;
4619 int iscv;
4620 GV *gv;
779c5bc9 4621 SV *kidsv = kid->op_sv;
2d8e6c8d 4622 STRLEN n_a;
44a8e56a 4623
779c5bc9
GS		 4624 /* Is it a constant from cv_const_sv()? */
4625 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4626 SV *rsv = SvRV(kidsv);
4627 int svtype = SvTYPE(rsv);
4628 char *badtype = Nullch;
4629
4630 switch (o->op_type) {
4631 case OP_RV2SV:
4632 if (svtype > SVt_PVMG)
4633 badtype = "a SCALAR";
4634 break;
4635 case OP_RV2AV:
4636 if (svtype != SVt_PVAV)
4637 badtype = "an ARRAY";
4638 break;
4639 case OP_RV2HV:
4640 if (svtype != SVt_PVHV) {
4641 if (svtype == SVt_PVAV) { /* pseudohash? */
4642 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4643 if (ksv && SvROK(*ksv)
4644 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4645 {
4646 break;
4647 }
4648 }
4649 badtype = "a HASH";
4650 }
4651 break;
4652 case OP_RV2CV:
4653 if (svtype != SVt_PVCV)
4654 badtype = "a CODE";
4655 break;
4656 }
4657 if (badtype)
cea2e8a9 4658 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 4659 return o;
4660 }
2d8e6c8d 4661 name = SvPV(kidsv, n_a);
3280af22 4662 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4663 char *badthing = Nullch;
5dc0d613 4664 switch (o->op_type) {
44a8e56a 4665 case OP_RV2SV:
4666 badthing = "a SCALAR";
4667 break;
4668 case OP_RV2AV:
4669 badthing = "an ARRAY";
4670 break;
4671 case OP_RV2HV:
4672 badthing = "a HASH";
4673 break;
4674 }
4675 if (badthing)
cea2e8a9 4676 Perl_croak(aTHX_
44a8e56a 4677 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4678 name, badthing);
4679 }
93233ece
CS		 4680 /*
4681 * This is a little tricky. We only want to add the symbol if we
4682 * didn't add it in the lexer. Otherwise we get duplicate strict
4683 * warnings. But if we didn't add it in the lexer, we must at
4684 * least pretend like we wanted to add it even if it existed before,
4685 * or we get possible typo warnings. OPpCONST_ENTERED says
4686 * whether the lexer already added THIS instance of this symbol.
4687 */
5196be3e 4688 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4689 do {
44a8e56a 4690 gv = gv_fetchpv(name,
748a9306 4691 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4692 iscv
4693 ? SVt_PVCV
11343788 4694 : o->op_type == OP_RV2SV
a0d0e21e 4695 ? SVt_PV
11343788 4696 : o->op_type == OP_RV2AV
a0d0e21e 4697 ? SVt_PVAV
11343788 4698 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4699 ? SVt_PVHV
4700 : SVt_PVGV);
93233ece
CS		 4701 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4702 if (gv) {
4703 kid->op_type = OP_GV;
4704 SvREFCNT_dec(kid->op_sv);
4705 kid->op_sv = SvREFCNT_inc(gv);
76cd736e 4706 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 4707 }
79072805 4708 }
11343788 4709 return o;
79072805
LW		 4710}
4711
4712OP *
cea2e8a9 4713Perl_ck_ftst(pTHX_ OP *o)
79072805 4714{
11343788
MB		 4715 dTHR;
4716 I32 type = o->op_type;
79072805 4717
11343788
MB		 4718 if (o->op_flags & OPf_REF)
4719 return o;
79072805 4720
108ed793 4721 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4722 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4723
4724 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 4725 STRLEN n_a;
a0d0e21e 4726 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 4727 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 4728 op_free(o);
79072805
LW		 4729 return newop;
4730 }
4731 }
4732 else {
11343788 4733 op_free(o);
79072805 4734 if (type == OP_FTTTY)
fb73857a 4735 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4736 SVt_PVIO));
79072805 4737 else
54b9620d 4738 return newUNOP(type, 0, newDEFSVOP());
79072805 4739 }
11343788 4740 return o;
79072805
LW		 4741}
4742
4743OP *
cea2e8a9 4744Perl_ck_fun(pTHX_ OP *o)
79072805 4745{
11343788 4746 dTHR;
79072805
LW		 4747 register OP *kid;
4748 OP **tokid;
4749 OP *sibl;
4750 I32 numargs = 0;
11343788 4751 int type = o->op_type;
22c35a8c 4752 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 4753
11343788 4754 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4755 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4756 oa &= ~OA_OPTIONAL;
4757 else
11343788 4758 return no_fh_allowed(o);
79072805
LW		 4759 }
4760
11343788 4761 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 4762 STRLEN n_a;
11343788
MB		 4763 tokid = &cLISTOPo->op_first;
4764 kid = cLISTOPo->op_first;
8990e307
LW		 4765 if (kid->op_type == OP_PUSHMARK ||
4766 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4767 {
79072805
LW		 4768 tokid = &kid->op_sibling;
4769 kid = kid->op_sibling;
4770 }
22c35a8c 4771 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 4772 *tokid = kid = newDEFSVOP();
79072805
LW		 4773
4774 while (oa && kid) {
4775 numargs++;
4776 sibl = kid->op_sibling;
4777 switch (oa & 7) {
4778 case OA_SCALAR:
62c18ce2
GS		 4779 /* list seen where single (scalar) arg expected? */
4780 if (numargs == 1 && !(oa >> 4)
4781 && kid->op_type == OP_LIST && type != OP_SCALAR)
4782 {
4783 return too_many_arguments(o,PL_op_desc[type]);
4784 }
79072805
LW		 4785 scalar(kid);
4786 break;
4787 case OA_LIST:
4788 if (oa < 16) {
4789 kid = 0;
4790 continue;
4791 }
4792 else
4793 list(kid);
4794 break;
4795 case OA_AVREF:
4796 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 4797 (kid->op_private & OPpCONST_BARE))
4798 {
2d8e6c8d 4799 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4800 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4801 gv_fetchpv(name, TRUE, SVt_PVAV) ));
cf2093f6 4802#ifdef IV_IS_QUAD
b9c39e73 4803 if (ckWARN(WARN_SYNTAX))
cf2093f6
JH		 4804 Perl_warner(aTHX_ WARN_SYNTAX,
4805 "Array @%s missing the @ in argument %" PERL_PRId64 " of %s()",
4806 name, (IV)numargs, PL_op_desc[type]);
4807#else
b9c39e73 4808 if (ckWARN(WARN_SYNTAX))
cea2e8a9 4809 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 4810 "Array @%s missing the @ in argument %ld of %s()",
22c35a8c 4811 name, (long)numargs, PL_op_desc[type]);
cf2093f6 4812#endif
79072805
LW		 4813 op_free(kid);
4814 kid = newop;
4815 kid->op_sibling = sibl;
4816 *tokid = kid;
4817 }
8990e307 4818 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 4819 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 4820 mod(kid, type);
79072805
LW		 4821 break;
4822 case OA_HVREF:
4823 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 4824 (kid->op_private & OPpCONST_BARE))
4825 {
2d8e6c8d 4826 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 4827 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4828 gv_fetchpv(name, TRUE, SVt_PVHV) ));
cf2093f6 4829#ifdef IV_IS_QUAD
b9c39e73 4830 if (ckWARN(WARN_SYNTAX))
cf2093f6
JH		 4831 Perl_warner(aTHX_ WARN_SYNTAX,
4832 "Hash %%%s missing the %% in argument %" PERL_PRId64 " of %s()",
4833 name, (IV)numargs, PL_op_desc[type]);
4834#else
b9c39e73 4835 if (ckWARN(WARN_SYNTAX))
cea2e8a9 4836 Perl_warner(aTHX_ WARN_SYNTAX,
599cee73 4837 "Hash %%%s missing the %% in argument %ld of %s()",
22c35a8c 4838 name, (long)numargs, PL_op_desc[type]);
cf2093f6 4839#endif
79072805
LW		 4840 op_free(kid);
4841 kid = newop;
4842 kid->op_sibling = sibl;
4843 *tokid = kid;
4844 }
8990e307 4845 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 4846 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 4847 mod(kid, type);
79072805
LW		 4848 break;
4849 case OA_CVREF:
4850 {
a0d0e21e 4851 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4852 kid->op_sibling = 0;
4853 linklist(kid);
4854 newop->op_next = newop;
4855 kid = newop;
4856 kid->op_sibling = sibl;
4857 *tokid = kid;
4858 }
4859 break;
4860 case OA_FILEREF:
c340be78 4861 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 4862 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 4863 (kid->op_private & OPpCONST_BARE))
4864 {
79072805 4865 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 4866 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 4867 SVt_PVIO) );
79072805
LW		 4868 op_free(kid);
4869 kid = newop;
4870 }
1ea32a52
GS		 4871 else if (kid->op_type == OP_READLINE) {
4872 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
4873 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
4874 }
79072805 4875 else {
35cd451c 4876 I32 flags = OPf_SPECIAL;
a6c40364 4877 I32 priv = 0;
35cd451c 4878 /* is this op a FH constructor? */
853846ea 4879 if (is_handle_constructor(o,numargs)) {
1d8d4d2a 4880 flags = 0;
853846ea
NIS		 4881 /* Set a flag to tell rv2gv to vivify
4882 * need to "prove" flag does not mean something
4883 * else already - NI-S 1999/05/07
4884 */
a6c40364 4885 priv = OPpDEREF;
1d8d4d2a
NIS		 4886#if 0
4887 /* Helps with open($array[$n],...)
4888 but is too simplistic - need to do selectively
4889 */
4890 mod(kid,type);
4891#endif
853846ea 4892 }
79072805 4893 kid->op_sibling = 0;
35cd451c 4894 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
a6c40364
GS		 4895 if (priv) {
4896 kid->op_private |= priv;
1d8d4d2a 4897 }
79072805
LW		 4898 }
4899 kid->op_sibling = sibl;
4900 *tokid = kid;
4901 }
4902 scalar(kid);
4903 break;
4904 case OA_SCALARREF:
a0d0e21e 4905 mod(scalar(kid), type);
79072805
LW		 4906 break;
4907 }
4908 oa >>= 4;
4909 tokid = &kid->op_sibling;
4910 kid = kid->op_sibling;
4911 }
11343788 4912 o->op_private |= numargs;
79072805 4913 if (kid)
22c35a8c 4914 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 4915 listkids(o);
79072805 4916 }
22c35a8c 4917 else if (PL_opargs[type] & OA_DEFGV) {
11343788 4918 op_free(o);
54b9620d 4919 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4920 }
4921
79072805
LW		 4922 if (oa) {
4923 while (oa & OA_OPTIONAL)
4924 oa >>= 4;
4925 if (oa && oa != OA_LIST)
22c35a8c 4926 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 4927 }
11343788 4928 return o;
79072805
LW		 4929}
4930
4931OP *
cea2e8a9 4932Perl_ck_glob(pTHX_ OP *o)
79072805 4933{
fb73857a 4934 GV *gv;
4935
1f2bfc8a 4936 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4937 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4938
4939 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4940 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4941
4942 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 4943 append_elem(OP_GLOB, o,
80252599 4944 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 4945 o->op_type = OP_LIST;
22c35a8c 4946 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 4947 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 4948 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 4949 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4950 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4951 scalar(newUNOP(OP_RV2CV, 0,
4952 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4953 o = newUNOP(OP_NULL, 0, ck_subr(o));
4954 o->op_targ = OP_GLOB; /* hint at what it used to be */
4955 return o;
b1cb66bf 4956 }
4957 gv = newGVgen("main");
a0d0e21e 4958 gv_IOadd(gv);
11343788
MB		 4959 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4960 scalarkids(o);
4961 return ck_fun(o);
79072805
LW		 4962}
4963
4964OP *
cea2e8a9 4965Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 4966{
4967 LOGOP *gwop;
4968 OP *kid;
11343788 4969 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4970
22c35a8c 4971 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 4972 NewOp(1101, gwop, 1, LOGOP);
aeea060c 4973
11343788 4974 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4975 OP* k;
11343788
MB		 4976 o = ck_sort(o);
4977 kid = cLISTOPo->op_first->op_sibling;
4978 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4979 kid = k;
4980 }
4981 kid->op_next = (OP*)gwop;
11343788 4982 o->op_flags &= ~OPf_STACKED;
93a17b20 4983 }
11343788 4984 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4985 if (type == OP_MAPWHILE)
4986 list(kid);
4987 else
4988 scalar(kid);
11343788 4989 o = ck_fun(o);
3280af22 4990 if (PL_error_count)
11343788 4991 return o;
aeea060c 4992 kid = cLISTOPo->op_first->op_sibling;
79072805 4993 if (kid->op_type != OP_NULL)
cea2e8a9 4994 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 4995 kid = kUNOP->op_first;
4996
a0d0e21e 4997 gwop->op_type = type;
22c35a8c 4998 gwop->op_ppaddr = PL_ppaddr[type];
11343788 4999 gwop->op_first = listkids(o);
79072805
LW		 5000 gwop->op_flags |= OPf_KIDS;
5001 gwop->op_private = 1;
5002 gwop->op_other = LINKLIST(kid);
a0d0e21e 5003 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5004 kid->op_next = (OP*)gwop;
5005
11343788 5006 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5007 if (!kid || !kid->op_sibling)
22c35a8c 5008 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5009 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5010 mod(kid, OP_GREPSTART);
5011
79072805
LW		 5012 return (OP*)gwop;
5013}
5014
5015OP *
cea2e8a9 5016Perl_ck_index(pTHX_ OP *o)
79072805 5017{
11343788
MB		 5018 if (o->op_flags & OPf_KIDS) {
5019 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5020 if (kid)
5021 kid = kid->op_sibling; /* get past "big" */
79072805 5022 if (kid && kid->op_type == OP_CONST)
2779dcf1 5023 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5024 }
11343788 5025 return ck_fun(o);
79072805
LW		 5026}
5027
5028OP *
cea2e8a9 5029Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5030{
5031 /* XXX length optimization goes here */
11343788 5032 return ck_fun(o);
79072805
LW		 5033}
5034
5035OP *
cea2e8a9 5036Perl_ck_lfun(pTHX_ OP *o)
79072805 5037{
5dc0d613
MB		 5038 OPCODE type = o->op_type;
5039 return modkids(ck_fun(o), type);
79072805
LW		 5040}
5041
5042OP *
cea2e8a9 5043Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5044{
20ce7b12 5045 dTHR;
d0334bed
GS		 5046 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5047 switch (cUNOPo->op_first->op_type) {
5048 case OP_RV2AV:
5049 case OP_PADAV:
5050 case OP_AASSIGN: /* Is this a good idea? */
5051 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5052 "defined(@array) is deprecated");
d0334bed
GS		 5053 Perl_warner(aTHX_ WARN_DEPRECATED,
5054 "(Maybe you should just omit the defined()?)\n");
69794302 5055 break;
d0334bed
GS		 5056 case OP_RV2HV:
5057 case OP_PADHV:
5058 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5059 "defined(%hash) is deprecated");
d0334bed
GS		 5060 Perl_warner(aTHX_ WARN_DEPRECATED,
5061 "(Maybe you should just omit the defined()?)\n");
5062 break;
5063 default:
5064 /* no warning */
5065 break;
5066 }
69794302
MJD		 5067 }
5068 return ck_rfun(o);
5069}
5070
5071OP *
cea2e8a9 5072Perl_ck_rfun(pTHX_ OP *o)
8990e307 5073{
5dc0d613
MB		 5074 OPCODE type = o->op_type;
5075 return refkids(ck_fun(o), type);
8990e307
LW		 5076}
5077
5078OP *
cea2e8a9 5079Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5080{
5081 register OP *kid;
aeea060c 5082
11343788 5083 kid = cLISTOPo->op_first;
79072805 5084 if (!kid) {
11343788
MB		 5085 o = force_list(o);
5086 kid = cLISTOPo->op_first;
79072805
LW		 5087 }
5088 if (kid->op_type == OP_PUSHMARK)
5089 kid = kid->op_sibling;
11343788 5090 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5091 kid = kid->op_sibling;
5092 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5093 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5094 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5095 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5096 cLISTOPo->op_first->op_sibling = kid;
5097 cLISTOPo->op_last = kid;
79072805
LW		 5098 kid = kid->op_sibling;
5099 }
5100 }
5101
5102 if (!kid)
54b9620d 5103 append_elem(o->op_type, o, newDEFSVOP());
79072805 5104
5dc0d613 5105 o = listkids(o);
bbce6d69 5106
5dc0d613 5107 o->op_private = 0;
36477c24 5108#ifdef USE_LOCALE
3280af22 5109 if (PL_hints & HINT_LOCALE)
5dc0d613 5110 o->op_private |= OPpLOCALE;
bbce6d69 5111#endif
5112
5dc0d613 5113 return o;
bbce6d69 5114}
5115
5116OP *
cea2e8a9 5117Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5118{
5dc0d613 5119 o = ck_fun(o);
bbce6d69 5120
5dc0d613 5121 o->op_private = 0;
36477c24 5122#ifdef USE_LOCALE
3280af22 5123 if (PL_hints & HINT_LOCALE)
5dc0d613 5124 o->op_private |= OPpLOCALE;
bbce6d69 5125#endif
5126
5dc0d613 5127 return o;
bbce6d69 5128}
5129
5130OP *
b162f9ea
IZ		 5131Perl_ck_sassign(pTHX_ OP *o)
5132{
5133 OP *kid = cLISTOPo->op_first;
5134 /* has a disposable target? */
5135 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
5136 && !(kid->op_flags & OPf_STACKED))
5137 {
5138 OP *kkid = kid->op_sibling;
5139
5140 /* Can just relocate the target. */
2c2d71f5
JH		 5141 if (kkid && kkid->op_type == OP_PADSV
5142 && !(kkid->op_private & OPpLVAL_INTRO))
5143 {
b162f9ea
IZ		 5144 /* Concat has problems if target is equal to right arg. */
5145 if (kid->op_type == OP_CONCAT
5146 && kLISTOP->op_first->op_sibling->op_type == OP_PADSV
5147 && kLISTOP->op_first->op_sibling->op_targ == kkid->op_targ)
5148 {
5149 return o;
5150 }
5151 kid->op_targ = kkid->op_targ;
5152 /* Now we do not need PADSV and SASSIGN. */
5153 kid->op_sibling = o->op_sibling; /* NULL */
5154 cLISTOPo->op_first = NULL;
5155 op_free(o);
5156 op_free(kkid);
5157 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5158 return kid;
5159 }
5160 }
5161 return o;
5162}
5163
5164OP *
cea2e8a9 5165Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5166{
5dc0d613 5167 o->op_private = 0;
36477c24 5168#ifdef USE_LOCALE
3280af22 5169 if (PL_hints & HINT_LOCALE)
5dc0d613 5170 o->op_private |= OPpLOCALE;
bbce6d69 5171#endif
36477c24 5172
5dc0d613 5173 return o;
79072805
LW		 5174}
5175
5176OP *
cea2e8a9 5177Perl_ck_match(pTHX_ OP *o)
79072805 5178{
5dc0d613 5179 o->op_private |= OPpRUNTIME;
11343788 5180 return o;
79072805
LW		 5181}
5182
5183OP *
f5d5a27c
CS		 5184Perl_ck_method(pTHX_ OP *o)
5185{
5186 OP *kid = cUNOPo->op_first;
5187 if (kid->op_type == OP_CONST) {
5188 SV* sv = kSVOP->op_sv;
5189 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5190 OP *cmop;
5191 sv_upgrade(sv, SVt_PVIV);
5192 SvIOK_on(sv);
5193 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5194 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5195 kSVOP->op_sv = Nullsv;
5196 op_free(o);
5197 return cmop;
5198 }
5199 }
5200 return o;
5201}
5202
5203OP *
cea2e8a9 5204Perl_ck_null(pTHX_ OP *o)
79072805 5205{
11343788 5206 return o;
79072805
LW		 5207}
5208
5209OP *
cea2e8a9 5210Perl_ck_repeat(pTHX_ OP *o)
79072805 5211{
11343788
MB		 5212 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5213 o->op_private |= OPpREPEAT_DOLIST;
5214 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5215 }
5216 else
11343788
MB		 5217 scalar(o);
5218 return o;
79072805
LW		 5219}
5220
5221OP *
cea2e8a9 5222Perl_ck_require(pTHX_ OP *o)
8990e307 5223{
11343788
MB		 5224 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5225 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5226
5227 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5228 char *s;
a0d0e21e
LW		 5229 for (s = SvPVX(kid->op_sv); *s; s++) {
5230 if (*s == ':' && s[1] == ':') {
5231 *s = '/';
1aef975c 5232 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5233 --SvCUR(kid->op_sv);
5234 }
8990e307 5235 }
a0d0e21e 5236 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5237 }
5238 }
11343788 5239 return ck_fun(o);
8990e307
LW		 5240}
5241
22c35a8c 5242#if 0
8990e307 5243OP *
cea2e8a9 5244Perl_ck_retarget(pTHX_ OP *o)
79072805 5245{
cea2e8a9 5246 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5247 /* STUB */
11343788 5248 return o;
79072805 5249}
22c35a8c 5250#endif
79072805
LW		 5251
5252OP *
cea2e8a9 5253Perl_ck_select(pTHX_ OP *o)
79072805 5254{
c07a80fd 5255 OP* kid;
11343788
MB		 5256 if (o->op_flags & OPf_KIDS) {
5257 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5258 if (kid && kid->op_sibling) {
11343788 5259 o->op_type = OP_SSELECT;
22c35a8c 5260 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5261 o = ck_fun(o);
5262 return fold_constants(o);
79072805
LW		 5263 }
5264 }
11343788
MB		 5265 o = ck_fun(o);
5266 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5267 if (kid && kid->op_type == OP_RV2GV)
5268 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5269 return o;
79072805
LW		 5270}
5271
5272OP *
cea2e8a9 5273Perl_ck_shift(pTHX_ OP *o)
79072805 5274{
11343788 5275 I32 type = o->op_type;
79072805 5276
11343788 5277 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5278 OP *argop;
5279
11343788 5280 op_free(o);
6d4ff0d2 5281#ifdef USE_THREADS
533c011a 5282 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5283 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5284 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5285 }
5286 else {
5287 argop = newUNOP(OP_RV2AV, 0,
5288 scalar(newGVOP(OP_GV, 0,
5289 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5290 }
5291#else
5292 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5293 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5294 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5295#endif /* USE_THREADS */
5296 return newUNOP(type, 0, scalar(argop));
79072805 5297 }
11343788 5298 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5299}
5300
5301OP *
cea2e8a9 5302Perl_ck_sort(pTHX_ OP *o)
79072805 5303{
5dc0d613 5304 o->op_private = 0;
36477c24 5305#ifdef USE_LOCALE
3280af22 5306 if (PL_hints & HINT_LOCALE)
5dc0d613 5307 o->op_private |= OPpLOCALE;
bbce6d69 5308#endif
5309
9ea6e965 5310 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 5311 simplify_sort(o);
9c007264 5312 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
11343788 5313 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2 5314 OP *k;
82092f1d 5315 kid = kUNOP->op_first; /* get past null */
79072805 5316
463ee0b2 5317 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5318 linklist(kid);
463ee0b2
LW		 5319 if (kid->op_type == OP_SCOPE) {
5320 k = kid->op_next;
5321 kid->op_next = 0;
79072805 5322 }
463ee0b2 5323 else if (kid->op_type == OP_LEAVE) {
11343788 5324 if (o->op_type == OP_SORT) {
748a9306
LW		 5325 null(kid); /* wipe out leave */
5326 kid->op_next = kid;
463ee0b2 5327
748a9306
LW		 5328 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5329 if (k->op_next == kid)
5330 k->op_next = 0;
5331 }
463ee0b2 5332 }
748a9306
LW		 5333 else
5334 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5335 k = kLISTOP->op_first;
463ee0b2 5336 }
a0d0e21e
LW		 5337 peep(k);
5338
11343788 5339 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
11343788 5340 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5341 kid->op_next = kid;
5342 else
5343 kid->op_next = k;
11343788 5344 o->op_flags |= OPf_SPECIAL;
79072805 5345 }
c6e96bcb
GS		 5346 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5347 null(cLISTOPo->op_first->op_sibling);
79072805 5348 }
bbce6d69 5349
11343788 5350 return o;
79072805 5351}
bda4119b
GS		 5352
5353STATIC void
cea2e8a9 5354S_simplify_sort(pTHX_ OP *o)
9c007264 5355{
51a19bc0 5356 dTHR;
9c007264
JH		 5357 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
5358 OP *k;
5359 int reversed;
5360 if (!(o->op_flags & OPf_STACKED))
5361 return;
9ea6e965
GS		 5362 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
5363 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 5364 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 5365 if (kid->op_type != OP_SCOPE)
5366 return;
5367 kid = kLISTOP->op_last; /* get past scope */
5368 switch(kid->op_type) {
5369 case OP_NCMP:
5370 case OP_I_NCMP:
5371 case OP_SCMP:
5372 break;
5373 default:
5374 return;
5375 }
5376 k = kid; /* remember this node*/
5377 if (kBINOP->op_first->op_type != OP_RV2SV)
5378 return;
5379 kid = kBINOP->op_first; /* get past cmp */
5380 if (kUNOP->op_first->op_type != OP_GV)
5381 return;
5382 kid = kUNOP->op_first; /* get past rv2sv */
5383 if (GvSTASH(kGVOP->op_gv) != PL_curstash)
5384 return;
5385 if (strEQ(GvNAME(kGVOP->op_gv), "a"))
5386 reversed = 0;
5387 else if(strEQ(GvNAME(kGVOP->op_gv), "b"))
5388 reversed = 1;
5389 else
5390 return;
5391 kid = k; /* back to cmp */
5392 if (kBINOP->op_last->op_type != OP_RV2SV)
5393 return;
5394 kid = kBINOP->op_last; /* down to 2nd arg */
5395 if (kUNOP->op_first->op_type != OP_GV)
5396 return;
5397 kid = kUNOP->op_first; /* get past rv2sv */
5398 if (GvSTASH(kGVOP->op_gv) != PL_curstash
5399 || ( reversed
5400 ? strNE(GvNAME(kGVOP->op_gv), "a")
5401 : strNE(GvNAME(kGVOP->op_gv), "b")))
5402 return;
5403 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
5404 if (reversed)
5405 o->op_private |= OPpSORT_REVERSE;
5406 if (k->op_type == OP_NCMP)
5407 o->op_private |= OPpSORT_NUMERIC;
5408 if (k->op_type == OP_I_NCMP)
5409 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
5410 op_free(cLISTOPo->op_first->op_sibling); /* delete comparison block */
5411 cLISTOPo->op_first->op_sibling = cLISTOPo->op_last;
5412 cLISTOPo->op_children = 1;
5413}
79072805
LW		 5414
5415OP *
cea2e8a9 5416Perl_ck_split(pTHX_ OP *o)
79072805
LW		 5417{
5418 register OP *kid;
aeea060c 5419
11343788
MB		 5420 if (o->op_flags & OPf_STACKED)
5421 return no_fh_allowed(o);
79072805 5422
11343788 5423 kid = cLISTOPo->op_first;
8990e307 5424 if (kid->op_type != OP_NULL)
cea2e8a9 5425 Perl_croak(aTHX_ "panic: ck_split");
8990e307 5426 kid = kid->op_sibling;
11343788
MB		 5427 op_free(cLISTOPo->op_first);
5428 cLISTOPo->op_first = kid;
85e6fe83 5429 if (!kid) {
79cb57f6 5430 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 5431 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5432 }
79072805
LW		 5433
5434 if (kid->op_type != OP_MATCH) {
5435 OP *sibl = kid->op_sibling;
463ee0b2 5436 kid->op_sibling = 0;
79072805 5437 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5438 if (cLISTOPo->op_first == cLISTOPo->op_last)
5439 cLISTOPo->op_last = kid;
5440 cLISTOPo->op_first = kid;
79072805
LW		 5441 kid->op_sibling = sibl;
5442 }
5443
5444 kid->op_type = OP_PUSHRE;
22c35a8c 5445 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5446 scalar(kid);
5447
5448 if (!kid->op_sibling)
54b9620d 5449 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5450
5451 kid = kid->op_sibling;
5452 scalar(kid);
5453
5454 if (!kid->op_sibling)
11343788 5455 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5456
5457 kid = kid->op_sibling;
5458 scalar(kid);
5459
5460 if (kid->op_sibling)
22c35a8c 5461 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5462
11343788 5463 return o;
79072805
LW		 5464}
5465
5466OP *
cea2e8a9 5467Perl_ck_subr(pTHX_ OP *o)
79072805 5468{
11343788
MB		 5469 dTHR;
5470 OP *prev = ((cUNOPo->op_first->op_sibling)
5471 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5472 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5473 OP *cvop;
5474 char *proto = 0;
5475 CV *cv = 0;
46fc3d4c 5476 GV *namegv = 0;
4633a7c4
LW		 5477 int optional = 0;
5478 I32 arg = 0;
2d8e6c8d 5479 STRLEN n_a;
4633a7c4 5480
11343788 5481 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5482 if (cvop->op_type == OP_RV2CV) {
5483 SVOP* tmpop;
11343788 5484 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5485 null(cvop); /* disable rv2cv */
5486 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 5487 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
8ebc5c01 5488 cv = GvCVu(tmpop->op_sv);
76cd736e
GS		 5489 if (!cv)
5490 tmpop->op_private |= OPpEARLY_CV;
5491 else if (SvPOK(cv)) {
46fc3d4c 5492 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
2d8e6c8d 5493 proto = SvPV((SV*)cv, n_a);
46fc3d4c 5494 }
4633a7c4
LW		 5495 }
5496 }
f5d5a27c 5497 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 5498 if (o2->op_type == OP_CONST)
5499 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 5500 else if (o2->op_type == OP_LIST) {
5501 OP *o = ((UNOP*)o2)->op_first->op_sibling;
5502 if (o && o->op_type == OP_CONST)
5503 o->op_private &= ~OPpCONST_STRICT;
5504 }
7a52d87a 5505 }
3280af22
NIS		 5506 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5507 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5508 o->op_private |= OPpENTERSUB_DB;
5509 while (o2 != cvop) {
4633a7c4
LW		 5510 if (proto) {
5511 switch (*proto) {
5512 case '\0':
5dc0d613 5513 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5514 case ';':
5515 optional = 1;
5516 proto++;
5517 continue;
5518 case '$':
5519 proto++;
5520 arg++;
11343788 5521 scalar(o2);
4633a7c4
LW		 5522 break;
5523 case '%':
5524 case '@':
11343788 5525 list(o2);
4633a7c4
LW		 5526 arg++;
5527 break;
5528 case '&':
5529 proto++;
5530 arg++;
11343788 5531 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5532 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5533 break;
5534 case '*':
2ba6ecf4 5535 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 5536 proto++;
5537 arg++;
11343788 5538 if (o2->op_type == OP_RV2GV)
2ba6ecf4 5539 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 5540 else if (o2->op_type == OP_CONST)
5541 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 5542 else if (o2->op_type == OP_ENTERSUB) {
5543 /* accidental subroutine, revert to bareword */
5544 OP *gvop = ((UNOP*)o2)->op_first;
5545 if (gvop && gvop->op_type == OP_NULL) {
5546 gvop = ((UNOP*)gvop)->op_first;
5547 if (gvop) {
5548 for (; gvop->op_sibling; gvop = gvop->op_sibling)
5549 ;
5550 if (gvop &&
5551 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
5552 (gvop = ((UNOP*)gvop)->op_first) &&
5553 gvop->op_type == OP_GV)
5554 {
5555 GV *gv = (GV*)((SVOP*)gvop)->op_sv;
5556 OP *sibling = o2->op_sibling;
2692f720 5557 SV *n = newSVpvn("",0);
9675f7ac 5558 op_free(o2);
2692f720
GS		 5559 gv_fullname3(n, gv, "");
5560 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
5561 sv_chop(n, SvPVX(n)+6);
5562 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 5563 prev->op_sibling = o2;
5564 o2->op_sibling = sibling;
5565 }
5566 }
5567 }
5568 }
2ba6ecf4
GS		 5569 scalar(o2);
5570 break;
4633a7c4
LW		 5571 case '\\':
5572 proto++;
5573 arg++;
5574 switch (*proto++) {
5575 case '*':
11343788 5576 if (o2->op_type != OP_RV2GV)
5dc0d613 5577 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5578 goto wrapref;
5579 case '&':
11343788 5580 if (o2->op_type != OP_RV2CV)
5dc0d613 5581 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5582 goto wrapref;
5583 case '$':
386acf99
GS		 5584 if (o2->op_type != OP_RV2SV
5585 && o2->op_type != OP_PADSV
1c01eb51
GS		 5586 && o2->op_type != OP_HELEM
5587 && o2->op_type != OP_AELEM
386acf99
GS		 5588 && o2->op_type != OP_THREADSV)
5589 {
5dc0d613 5590 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5591 }
4633a7c4
LW		 5592 goto wrapref;
5593 case '@':
11343788 5594 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5595 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5596 goto wrapref;
5597 case '%':
11343788 5598 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5599 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5600 wrapref:
5601 {
11343788 5602 OP* kid = o2;
6fa846a0 5603 OP* sib = kid->op_sibling;
4633a7c4 5604 kid->op_sibling = 0;
6fa846a0
GS		 5605 o2 = newUNOP(OP_REFGEN, 0, kid);
5606 o2->op_sibling = sib;
e858de61 5607 prev->op_sibling = o2;
4633a7c4
LW		 5608 }
5609 break;
5610 default: goto oops;
5611 }
5612 break;
b1cb66bf 5613 case ' ':
5614 proto++;
5615 continue;
4633a7c4
LW		 5616 default:
5617 oops:
cea2e8a9 5618 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 5619 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 5620 }
5621 }
5622 else
11343788
MB		 5623 list(o2);
5624 mod(o2, OP_ENTERSUB);
5625 prev = o2;
5626 o2 = o2->op_sibling;
4633a7c4 5627 }
fb73857a 5628 if (proto && !optional &&
5629 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5630 return too_few_arguments(o, gv_ename(namegv));
11343788 5631 return o;
79072805
LW		 5632}
5633
5634OP *
cea2e8a9 5635Perl_ck_svconst(pTHX_ OP *o)
8990e307 5636{
11343788
MB		 5637 SvREADONLY_on(cSVOPo->op_sv);
5638 return o;
8990e307
LW		 5639}
5640
5641OP *
cea2e8a9 5642Perl_ck_trunc(pTHX_ OP *o)
79072805 5643{
11343788
MB		 5644 if (o->op_flags & OPf_KIDS) {
5645 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5646
a0d0e21e
LW		 5647 if (kid->op_type == OP_NULL)
5648 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 5649 if (kid && kid->op_type == OP_CONST &&
5650 (kid->op_private & OPpCONST_BARE))
5651 {
11343788 5652 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 5653 kid->op_private &= ~OPpCONST_STRICT;
5654 }
79072805 5655 }
11343788 5656 return ck_fun(o);
79072805
LW		 5657}
5658
463ee0b2
LW		 5659/* A peephole optimizer. We visit the ops in the order they're to execute. */
5660
79072805 5661void
864dbfa3 5662Perl_peep(pTHX_ register OP *o)
79072805 5663{
11343788 5664 dTHR;
79072805 5665 register OP* oldop = 0;
2d8e6c8d
GS		 5666 STRLEN n_a;
5667
a0d0e21e 5668 if (!o || o->op_seq)
79072805 5669 return;
a0d0e21e 5670 ENTER;
462e5cf6 5671 SAVEOP();
3280af22 5672 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5673 for (; o; o = o->op_next) {
5674 if (o->op_seq)
5675 break;
3280af22
NIS		 5676 if (!PL_op_seqmax)
5677 PL_op_seqmax++;
533c011a 5678 PL_op = o;
a0d0e21e 5679 switch (o->op_type) {
acb36ea4 5680 case OP_SETSTATE:
a0d0e21e
LW		 5681 case OP_NEXTSTATE:
5682 case OP_DBSTATE:
3280af22
NIS		 5683 PL_curcop = ((COP*)o); /* for warnings */
5684 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5685 break;
5686
a0d0e21e 5687 case OP_CONST:
7a52d87a
GS		 5688 if (cSVOPo->op_private & OPpCONST_STRICT)
5689 no_bareword_allowed(o);
5690 /* FALL THROUGH */
a0d0e21e
LW		 5691 case OP_UC:
5692 case OP_UCFIRST:
5693 case OP_LC:
5694 case OP_LCFIRST:
ed7ab888
GS		 5695 if ( o->op_next && o->op_next->op_type == OP_STRINGIFY
5696 && !(o->op_next->op_private & OPpTARGET_MY) )
5697 null(o->op_next);
5698 o->op_seq = PL_op_seqmax++;
5699 break;
5700 case OP_CONCAT:
5701 case OP_JOIN:
a0d0e21e 5702 case OP_QUOTEMETA:
b162f9ea
IZ		 5703 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
5704 if (o->op_next->op_private & OPpTARGET_MY) {
ed7ab888 5705 if ((o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea
IZ		 5706 || (o->op_type == OP_CONCAT
5707 /* Concat has problems if target is equal to right arg. */
5708 && (((LISTOP*)o)->op_first->op_sibling->op_type
5709 == OP_PADSV)
5710 && (((LISTOP*)o)->op_first->op_sibling->op_targ
5711 == o->op_next->op_targ))) {
5712 goto ignore_optimization;
5713 } else {
5714 o->op_targ = o->op_next->op_targ;
2c2d71f5 5715 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 5716 }
5717 }
a0d0e21e 5718 null(o->op_next);
b162f9ea
IZ		 5719 }
5720 ignore_optimization:
3280af22 5721 o->op_seq = PL_op_seqmax++;
a0d0e21e 5722 break;
8990e307 5723 case OP_STUB:
54310121 5724 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5725 o->op_seq = PL_op_seqmax++;
54310121 5726 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5727 }
748a9306 5728 goto nothin;
79072805 5729 case OP_NULL:
acb36ea4
GS		 5730 if (o->op_targ == OP_NEXTSTATE
5731 || o->op_targ == OP_DBSTATE
5732 || o->op_targ == OP_SETSTATE)
5733 {
3280af22 5734 PL_curcop = ((COP*)o);
acb36ea4 5735 }
748a9306 5736 goto nothin;
79072805 5737 case OP_SCALAR:
93a17b20 5738 case OP_LINESEQ:
463ee0b2 5739 case OP_SCOPE:
748a9306 5740 nothin:
a0d0e21e
LW		 5741 if (oldop && o->op_next) {
5742 oldop->op_next = o->op_next;
79072805
LW		 5743 continue;
5744 }
3280af22 5745 o->op_seq = PL_op_seqmax++;
79072805
LW		 5746 break;
5747
5748 case OP_GV:
a0d0e21e 5749 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5750 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5751 null(o->op_next);
5752 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5753 o->op_next = o->op_next->op_next;
5754 o->op_type = OP_GVSV;
22c35a8c 5755 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 5756 }
5757 }
a0d0e21e
LW		 5758 else if (o->op_next->op_type == OP_RV2AV) {
5759 OP* pop = o->op_next->op_next;
5760 IV i;
8990e307 5761 if (pop->op_type == OP_CONST &&
533c011a 5762 (PL_op = pop->op_next) &&
8990e307 5763 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5764 !(pop->op_next->op_private &
68dc0745 5765 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5766 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5767 <= 255 &&
8990e307
LW		 5768 i >= 0)
5769 {
a0d0e21e 5770 null(o->op_next);
8990e307
LW		 5771 null(pop->op_next);
5772 null(pop);
a0d0e21e
LW		 5773 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5774 o->op_next = pop->op_next->op_next;
5775 o->op_type = OP_AELEMFAST;
22c35a8c 5776 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 5777 o->op_private = (U8)i;
a6006777 5778 GvAVn(((GVOP*)o)->op_gv);
8990e307 5779 }
79072805 5780 }
76cd736e
GS		 5781 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_UNSAFE)) {
5782 GV *gv = cGVOPo->op_gv;
5783 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
5784 /* XXX could check prototype here instead of just carping */
5785 SV *sv = sv_newmortal();
5786 gv_efullname3(sv, gv, Nullch);
5787 Perl_warner(aTHX_ WARN_UNSAFE,
5788 "%s() called too early to check prototype",
5789 SvPV_nolen(sv));
5790 }
5791 }
5792
3280af22 5793 o->op_seq = PL_op_seqmax++;
79072805
LW		 5794 break;
5795
a0d0e21e 5796 case OP_MAPWHILE:
79072805
LW		 5797 case OP_GREPWHILE:
5798 case OP_AND:
5799 case OP_OR:
2c2d71f5
JH		 5800 case OP_ANDASSIGN:
5801 case OP_ORASSIGN:
1a67a97c
SM		 5802 case OP_COND_EXPR:
5803 case OP_RANGE:
3280af22 5804 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5805 while (cLOGOP->op_other->op_type == OP_NULL)
5806 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5807 peep(cLOGOP->op_other);
5808 break;
5809
79072805 5810 case OP_ENTERLOOP:
3280af22 5811 o->op_seq = PL_op_seqmax++;
79072805
LW		 5812 peep(cLOOP->op_redoop);
5813 peep(cLOOP->op_nextop);
5814 peep(cLOOP->op_lastop);
5815 break;
5816
8782bef2 5817 case OP_QR:
79072805
LW		 5818 case OP_MATCH:
5819 case OP_SUBST:
3280af22 5820 o->op_seq = PL_op_seqmax++;
a0d0e21e 5821 peep(cPMOP->op_pmreplstart);
79072805
LW		 5822 break;
5823
a0d0e21e 5824 case OP_EXEC:
3280af22 5825 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5826 if (ckWARN(WARN_SYNTAX) && o->op_next
5827 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5828 if (o->op_next->op_sibling &&
20408e3c
GS		 5829 o->op_next->op_sibling->op_type != OP_EXIT &&
5830 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5831 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5832 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5833
3280af22 5834 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
cea2e8a9
GS		 5835 Perl_warner(aTHX_ WARN_SYNTAX, "Statement unlikely to be reached");
5836 Perl_warner(aTHX_ WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5837 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5838 }
5839 }
5840 break;
aeea060c 5841
c750a3ec
MB		 5842 case OP_HELEM: {
5843 UNOP *rop;
5844 SV *lexname;
5845 GV **fields;
5846 SV **svp, **indsvp;
5847 I32 ind;
5848 char *key;
5849 STRLEN keylen;
aeea060c 5850
377b21bb 5851 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 5852 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5853 break;
5854 rop = (UNOP*)((BINOP*)o)->op_first;
5855 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5856 break;
3280af22 5857 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 5858 if (!SvOBJECT(lexname))
5859 break;
5196be3e 5860 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5861 if (!fields || !GvHV(*fields))
5862 break;
5863 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5864 key = SvPV(*svp, keylen);
5865 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5866 if (!indsvp) {
cea2e8a9 5867 Perl_croak(aTHX_ "No such field \"%s\" in variable %s of type %s",
2d8e6c8d 5868 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 5869 }
5870 ind = SvIV(*indsvp);
5871 if (ind < 1)
cea2e8a9 5872 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 5873 rop->op_type = OP_RV2AV;
22c35a8c 5874 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 5875 o->op_type = OP_AELEM;
22c35a8c 5876 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 5877 SvREFCNT_dec(*svp);
5878 *svp = newSViv(ind);
5879 break;
5880 }
5881
79072805 5882 default:
3280af22 5883 o->op_seq = PL_op_seqmax++;
79072805
LW		 5884 break;
5885 }
a0d0e21e 5886 oldop = o;
79072805 5887 }
a0d0e21e 5888 LEAVE;
79072805 5889}
Unnamed repository; edit this file 'description' to name the repository.