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a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e 24
1c846c1f 25#ifdef PL_OP_SLAB_ALLOC
b7dc083c
NIS		 26#define SLAB_SIZE 8192
27static char *PL_OpPtr = NULL;
28static int PL_OpSpace = 0;
29#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
30 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
31 else \
32 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
33 } while (0)
34
1c846c1f 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
1c846c1f 37{
b7dc083c
NIS		 38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
1c846c1f 43#else
b7dc083c
NIS		 44#define NewOp(m, var, c, type) Newz(m, var, c, type)
45#endif
e50aee73 46/*
5dc0d613 47 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 48 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 49 */
11343788 50#define CHECKOP(type,o) \
3280af22 51 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 52 ? ( op_free((OP*)o), \
cea2e8a9 53 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 54 Nullop ) \
fc0dc3b3 55 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 56
c53d7c7d
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
a0d0e21e
LW		 110 PADOFFSET off;
111 SV *sv;
112
155aba94
GS		 113 if (!(PL_in_my == KEY_our ||
114 isALPHA(name[1]) ||
115 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
116 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 117 {
c4d0567e 118 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 119 /* 1999-02-27 mjd@plover.com */
120 char *p;
121 p = strchr(name, '\0');
122 /* The next block assumes the buffer is at least 205 chars
123 long. At present, it's always at least 256 chars. */
124 if (p-name > 200) {
125 strcpy(name+200, "...");
126 p = name+199;
127 }
128 else {
129 p[1] = '\0';
130 }
131 /* Move everything else down one character */
132 for (; p-name > 2; p--)
133 *p = *(p-1);
46fc3d4c 134 name[2] = toCTRL(name[1]);
135 name[1] = '^';
136 }
cea2e8a9 137 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 138 }
e476b1b5 139 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 140 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 141 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
142 PADOFFSET top = AvFILLp(PL_comppad_name);
143 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 144 if ((sv = svp[off])
3280af22 145 && sv != &PL_sv_undef
c53d7c7d 146 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 147 && (PL_in_my != KEY_our
148 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 149 && strEQ(name, SvPVX(sv)))
150 {
e476b1b5 151 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 152 "\"%s\" variable %s masks earlier declaration in same %s",
33633739
GS		 153 (PL_in_my == KEY_our ? "our" : "my"),
154 name,
155 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
156 --off;
157 break;
158 }
159 }
160 if (PL_in_my == KEY_our) {
635bab04 161 do {
33633739
GS		 162 if ((sv = svp[off])
163 && sv != &PL_sv_undef
5ce0178e 164 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 165 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
166 && strEQ(name, SvPVX(sv)))
f472eb5c 167 {
e476b1b5 168 Perl_warner(aTHX_ WARN_MISC,
33633739 169 "\"our\" variable %s redeclared", name);
e476b1b5 170 Perl_warner(aTHX_ WARN_MISC,
cc507455 171 "\t(Did you mean \"local\" instead of \"our\"?)\n");
33633739 172 break;
f472eb5c 173 }
635bab04 174 } while ( off-- > 0 );
b1cb66bf 175 }
176 }
a0d0e21e
LW		 177 off = pad_alloc(OP_PADSV, SVs_PADMY);
178 sv = NEWSV(1102,0);
93a17b20
LW		 179 sv_upgrade(sv, SVt_PVNV);
180 sv_setpv(sv, name);
3280af22 181 if (PL_in_my_stash) {
c750a3ec 182 if (*name != '$')
eb64745e
GS		 183 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
184 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 185 SvOBJECT_on(sv);
186 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 187 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
188 PL_sv_objcount++;
c750a3ec 189 }
f472eb5c
GS		 190 if (PL_in_my == KEY_our) {
191 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 192 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 193 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 194 }
3280af22 195 av_store(PL_comppad_name, off, sv);
65202027 196 SvNVX(sv) = (NV)PAD_MAX;
8990e307 197 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 198 if (!PL_min_intro_pending)
199 PL_min_intro_pending = off;
200 PL_max_intro_pending = off;
93a17b20 201 if (*name == '@')
3280af22 202 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 203 else if (*name == '%')
3280af22
NIS		 204 av_store(PL_comppad, off, (SV*)newHV());
205 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 206 return off;
207}
208
94f23f41
GS		 209STATIC PADOFFSET
210S_pad_addlex(pTHX_ SV *proto_namesv)
211{
212 SV *namesv = NEWSV(1103,0);
213 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
214 sv_upgrade(namesv, SVt_PVNV);
215 sv_setpv(namesv, SvPVX(proto_namesv));
216 av_store(PL_comppad_name, newoff, namesv);
217 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
218 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
219 SvFAKE_on(namesv); /* A ref, not a real var */
220 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
221 SvFLAGS(namesv) |= SVpad_OUR;
222 (void)SvUPGRADE(namesv, SVt_PVGV);
223 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
224 }
225 if (SvOBJECT(proto_namesv)) { /* A typed var */
226 SvOBJECT_on(namesv);
227 (void)SvUPGRADE(namesv, SVt_PVMG);
228 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
229 PL_sv_objcount++;
230 }
231 return newoff;
232}
233
2680586e
GS		 234#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
235
76e3520e 236STATIC PADOFFSET
cea2e8a9 237S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 238 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 239{
748a9306 240 CV *cv;
93a17b20
LW		 241 I32 off;
242 SV *sv;
93a17b20 243 register I32 i;
c09156bb 244 register PERL_CONTEXT *cx;
93a17b20 245
748a9306 246 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 247 AV *curlist = CvPADLIST(cv);
248 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 249 AV *curname;
4fdae800 250
3280af22 251 if (!svp || *svp == &PL_sv_undef)
4633a7c4 252 continue;
748a9306
LW		 253 curname = (AV*)*svp;
254 svp = AvARRAY(curname);
93965878 255 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 256 if ((sv = svp[off]) &&
3280af22 257 sv != &PL_sv_undef &&
748a9306 258 seq <= SvIVX(sv) &&
13826f2c 259 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 260 strEQ(SvPVX(sv), name))
261 {
5f05dabc 262 I32 depth;
263 AV *oldpad;
264 SV *oldsv;
265
266 depth = CvDEPTH(cv);
267 if (!depth) {
9607fc9c 268 if (newoff) {
269 if (SvFAKE(sv))
270 continue;
4fdae800 271 return 0; /* don't clone from inactive stack frame */
9607fc9c 272 }
5f05dabc 273 depth = 1;
274 }
94f23f41 275 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 276 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 277 if (!newoff) { /* Not a mere clone operation. */
94f23f41 278 newoff = pad_addlex(sv);
3280af22 279 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 280 /* "It's closures all the way down." */
3280af22 281 CvCLONE_on(PL_compcv);
54310121 282 if (cv == startcv) {
3280af22 283 if (CvANON(PL_compcv))
54310121 284 oldsv = Nullsv; /* no need to keep ref */
285 }
286 else {
28757baa 287 CV *bcv;
288 for (bcv = startcv;
289 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 290 bcv = CvOUTSIDE(bcv))
291 {
94f23f41
GS		 292 if (CvANON(bcv)) {
293 /* install the missing pad entry in intervening
294 * nested subs and mark them cloneable.
295 * XXX fix pad_foo() to not use globals */
296 AV *ocomppad_name = PL_comppad_name;
297 AV *ocomppad = PL_comppad;
298 SV **ocurpad = PL_curpad;
299 AV *padlist = CvPADLIST(bcv);
300 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
301 PL_comppad = (AV*)AvARRAY(padlist)[1];
302 PL_curpad = AvARRAY(PL_comppad);
303 pad_addlex(sv);
304 PL_comppad_name = ocomppad_name;
305 PL_comppad = ocomppad;
306 PL_curpad = ocurpad;
28757baa 307 CvCLONE_on(bcv);
94f23f41 308 }
28757baa 309 else {
6b35e009
GS		 310 if (ckWARN(WARN_CLOSURE)
311 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
312 {
cea2e8a9 313 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 314 "Variable \"%s\" may be unavailable",
28757baa 315 name);
6b35e009 316 }
28757baa 317 break;
318 }
319 }
320 }
321 }
3280af22 322 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 323 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
324 && !(SvFLAGS(sv) & SVpad_OUR))
325 {
cea2e8a9 326 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 327 "Variable \"%s\" will not stay shared", name);
741b6338 328 }
5f05dabc 329 }
748a9306 330 }
3280af22 331 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 332 return newoff;
333 }
93a17b20
LW		 334 }
335 }
336
2680586e
GS		 337 if (flags & FINDLEX_NOSEARCH)
338 return 0;
339
93a17b20
LW		 340 /* Nothing in current lexical context--try eval's context, if any.
341 * This is necessary to let the perldb get at lexically scoped variables.
342 * XXX This will also probably interact badly with eval tree caching.
343 */
344
748a9306 345 for (i = cx_ix; i >= 0; i--) {
93a17b20 346 cx = &cxstack[i];
6b35e009 347 switch (CxTYPE(cx)) {
93a17b20 348 default:
748a9306
LW		 349 if (i == 0 && saweval) {
350 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 351 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 352 }
93a17b20
LW		 353 break;
354 case CXt_EVAL:
44a8e56a 355 switch (cx->blk_eval.old_op_type) {
356 case OP_ENTEREVAL:
6b35e009
GS		 357 if (CxREALEVAL(cx))
358 saweval = i;
44a8e56a 359 break;
faa7e5bb 360 case OP_DOFILE:
44a8e56a 361 case OP_REQUIRE:
faa7e5bb 362 /* require/do must have their own scope */
44a8e56a 363 return 0;
364 }
93a17b20 365 break;
7766f137 366 case CXt_FORMAT:
93a17b20
LW		 367 case CXt_SUB:
368 if (!saweval)
369 return 0;
370 cv = cx->blk_sub.cv;
3280af22 371 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 372 saweval = i; /* so we know where we were called from */
93a17b20 373 continue;
93a17b20 374 }
748a9306 375 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 376 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 377 }
378 }
379
748a9306
LW		 380 return 0;
381}
a0d0e21e 382
748a9306 383PADOFFSET
864dbfa3 384Perl_pad_findmy(pTHX_ char *name)
748a9306
LW		 385{
386 I32 off;
54310121 387 I32 pendoff = 0;
748a9306 388 SV *sv;
3280af22
NIS		 389 SV **svp = AvARRAY(PL_comppad_name);
390 U32 seq = PL_cop_seqmax;
6b35e009 391 PERL_CONTEXT *cx;
33b8ce05 392 CV *outside;
748a9306 393
11343788
MB		 394#ifdef USE_THREADS
395 /*
396 * Special case to get lexical (and hence per-thread) @_.
397 * XXX I need to find out how to tell at parse-time whether use
398 * of @_ should refer to a lexical (from a sub) or defgv (global
399 * scope and maybe weird sub-ish things like formats). See
400 * startsub in perly.y. It's possible that @_ could be lexical
401 * (at least from subs) even in non-threaded perl.
402 */
403 if (strEQ(name, "@_"))
404 return 0; /* success. (NOT_IN_PAD indicates failure) */
405#endif /* USE_THREADS */
406
748a9306 407 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 408 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 409 if ((sv = svp[off]) &&
3280af22 410 sv != &PL_sv_undef &&
54310121 411 (!SvIVX(sv) ||
412 (seq <= SvIVX(sv) &&
413 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 414 strEQ(SvPVX(sv), name))
415 {
77ca0c92 416 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 417 return (PADOFFSET)off;
418 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 419 }
420 }
748a9306 421
33b8ce05
GS		 422 outside = CvOUTSIDE(PL_compcv);
423
424 /* Check if if we're compiling an eval'', and adjust seq to be the
425 * eval's seq number. This depends on eval'' having a non-null
426 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 427 * identified by CvEVAL being true and CvGV being null. */
428 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 429 cx = &cxstack[cxstack_ix];
430 if (CxREALEVAL(cx))
431 seq = cx->blk_oldcop->cop_seq;
432 }
433
748a9306 434 /* See if it's in a nested scope */
2680586e 435 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 436 if (off) {
437 /* If there is a pending local definition, this new alias must die */
438 if (pendoff)
3280af22 439 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 440 return off; /* pad_findlex returns 0 for failure...*/
54310121 441 }
11343788 442 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 443}
444
445void
864dbfa3 446Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20
LW		 447{
448 I32 off;
3280af22 449 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 450 SV *sv;
3280af22
NIS		 451 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
452 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 453 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
454 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 455 }
456 }
457 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 458 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 459 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 460 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 461 }
462}
463
464PADOFFSET
864dbfa3 465Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805
LW		 466{
467 SV *sv;
468 I32 retval;
469
3280af22 470 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 471 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 472 if (PL_pad_reset_pending)
a0d0e21e 473 pad_reset();
ed6116ce 474 if (tmptype & SVs_PADMY) {
79072805 475 do {
3280af22 476 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 477 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 478 retval = AvFILLp(PL_comppad);
79072805
LW		 479 }
480 else {
3280af22
NIS		 481 SV **names = AvARRAY(PL_comppad_name);
482 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 483 for (;;) {
484 /*
485 * "foreach" index vars temporarily become aliases to non-"my"
486 * values. Thus we must skip, not just pad values that are
487 * marked as current pad values, but also those with names.
488 */
3280af22
NIS		 489 if (++PL_padix <= names_fill &&
490 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 491 continue;
3280af22 492 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
3049cdab
SB		 493 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) &&
494 !IS_PADGV(sv) && !IS_PADCONST(sv))
bbce6d69 495 break;
496 }
3280af22 497 retval = PL_padix;
79072805 498 }
8990e307 499 SvFLAGS(sv) |= tmptype;
3280af22 500 PL_curpad = AvARRAY(PL_comppad);
11343788 501#ifdef USE_THREADS
b900a521
JH		 502 DEBUG_X(PerlIO_printf(Perl_debug_log,
503 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
504 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 505 (long) retval, PL_op_name[optype]));
11343788 506#else
b900a521
JH		 507 DEBUG_X(PerlIO_printf(Perl_debug_log,
508 "Pad 0x%"UVxf" alloc %ld for %s\n",
509 PTR2UV(PL_curpad),
22c35a8c 510 (long) retval, PL_op_name[optype]));
11343788 511#endif /* USE_THREADS */
79072805
LW		 512 return (PADOFFSET)retval;
513}
514
515SV *
864dbfa3 516Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 517{
11343788 518#ifdef USE_THREADS
b900a521 519 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 520 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
521 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 522#else
79072805 523 if (!po)
cea2e8a9 524 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 525 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
526 PTR2UV(PL_curpad), (IV)po));
11343788 527#endif /* USE_THREADS */
3280af22 528 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 529}
530
531void
864dbfa3 532Perl_pad_free(pTHX_ PADOFFSET po)
79072805 533{
3280af22 534 if (!PL_curpad)
a0d0e21e 535 return;
3280af22 536 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 537 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 538 if (!po)
cea2e8a9 539 Perl_croak(aTHX_ "panic: pad_free po");
11343788 540#ifdef USE_THREADS
b900a521 541 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 542 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 543 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 544#else
97835f67
JH		 545 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
546 PTR2UV(PL_curpad), (IV)po));
11343788 547#endif /* USE_THREADS */
2aa1bedc 548 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 549 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 550#ifdef USE_ITHREADS
551 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
552#endif
553 }
3280af22
NIS		 554 if ((I32)po < PL_padix)
555 PL_padix = po - 1;
79072805
LW		 556}
557
558void
864dbfa3 559Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 560{
3280af22 561 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 562 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 563 if (!po)
cea2e8a9 564 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 565#ifdef USE_THREADS
b900a521 566 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 567 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
568 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 569#else
97835f67
JH		 570 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
571 PTR2UV(PL_curpad), (IV)po));
11343788 572#endif /* USE_THREADS */
3280af22
NIS		 573 SvPADTMP_off(PL_curpad[po]);
574 PL_curpad[po] = NEWSV(1107,0);
575 SvPADTMP_on(PL_curpad[po]);
576 if ((I32)po < PL_padix)
577 PL_padix = po - 1;
79072805
LW		 578}
579
d9bb4600
GS		 580/* XXX pad_reset() is currently disabled because it results in serious bugs.
581 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
582 * on the stack by OPs that use them, there are several ways to get an alias
583 * to a shared TARG. Such an alias will change randomly and unpredictably.
584 * We avoid doing this until we can think of a Better Way.
585 * GSAR 97-10-29 */
79072805 586void
864dbfa3 587Perl_pad_reset(pTHX)
79072805 588{
d9bb4600 589#ifdef USE_BROKEN_PAD_RESET
79072805
LW		 590 register I32 po;
591
6b88bc9c 592 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 593 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 594#ifdef USE_THREADS
b900a521
JH		 595 DEBUG_X(PerlIO_printf(Perl_debug_log,
596 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
597 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 598#else
b900a521
JH		 599 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
600 PTR2UV(PL_curpad)));
11343788 601#endif /* USE_THREADS */
6b88bc9c
GS		 602 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
603 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
604 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
605 SvPADTMP_off(PL_curpad[po]);
748a9306 606 }
6b88bc9c 607 PL_padix = PL_padix_floor;
79072805 608 }
d9bb4600 609#endif
3280af22 610 PL_pad_reset_pending = FALSE;
79072805
LW		 611}
612
a863c7d1 613#ifdef USE_THREADS
54b9620d 614/* find_threadsv is not reentrant */
a863c7d1 615PADOFFSET
864dbfa3 616Perl_find_threadsv(pTHX_ const char *name)
a863c7d1 617{
a863c7d1
MB		 618 char *p;
619 PADOFFSET key;
554b3eca 620 SV **svp;
54b9620d 621 /* We currently only handle names of a single character */
533c011a 622 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 623 if (!p)
624 return NOT_IN_PAD;
533c011a 625 key = p - PL_threadsv_names;
2d8e6c8d 626 MUTEX_LOCK(&thr->mutex);
54b9620d 627 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 628 if (svp)
629 MUTEX_UNLOCK(&thr->mutex);
630 else {
554b3eca 631 SV *sv = NEWSV(0, 0);
54b9620d 632 av_store(thr->threadsv, key, sv);
940cb80d 633 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 634 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 635 /*
636 * Some magic variables used to be automagically initialised
637 * in gv_fetchpv. Those which are now per-thread magicals get
638 * initialised here instead.
639 */
640 switch (*name) {
54b9620d
MB		 641 case '_':
642 break;
554b3eca
MB		 643 case ';':
644 sv_setpv(sv, "\034");
1c846c1f 645 sv_magic(sv, 0, 0, name, 1);
554b3eca 646 break;
c277df42
IZ		 647 case '&':
648 case '`':
649 case '\'':
533c011a 650 PL_sawampersand = TRUE;
a3f914c5
GS		 651 /* FALL THROUGH */
652 case '1':
653 case '2':
654 case '3':
655 case '4':
656 case '5':
657 case '6':
658 case '7':
659 case '8':
660 case '9':
c277df42 661 SvREADONLY_on(sv);
d8b5173a 662 /* FALL THROUGH */
067391ea
GS		 663
664 /* XXX %! tied to Errno.pm needs to be added here.
665 * See gv_fetchpv(). */
666 /* case '!': */
667
54b9620d 668 default:
1c846c1f 669 sv_magic(sv, 0, 0, name, 1);
554b3eca 670 }
bf49b057 671 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 672 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 673 sv, (*name < 32) ? "^" : "",
674 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 675 }
676 return key;
677}
678#endif /* USE_THREADS */
679
79072805
LW		 680/* Destructor */
681
682void
864dbfa3 683Perl_op_free(pTHX_ OP *o)
79072805 684{
85e6fe83 685 register OP *kid, *nextkid;
acb36ea4 686 OPCODE type;
79072805 687
5dc0d613 688 if (!o || o->op_seq == (U16)-1)
79072805
LW		 689 return;
690
7934575e
GS		 691 if (o->op_private & OPpREFCOUNTED) {
692 switch (o->op_type) {
693 case OP_LEAVESUB:
694 case OP_LEAVESUBLV:
695 case OP_LEAVEEVAL:
696 case OP_LEAVE:
697 case OP_SCOPE:
698 case OP_LEAVEWRITE:
699 OP_REFCNT_LOCK;
700 if (OpREFCNT_dec(o)) {
701 OP_REFCNT_UNLOCK;
702 return;
703 }
704 OP_REFCNT_UNLOCK;
705 break;
706 default:
707 break;
708 }
709 }
710
11343788
MB		 711 if (o->op_flags & OPf_KIDS) {
712 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 713 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 714 op_free(kid);
85e6fe83 715 }
79072805 716 }
acb36ea4
GS		 717 type = o->op_type;
718 if (type == OP_NULL)
719 type = o->op_targ;
720
721 /* COP* is not cleared by op_clear() so that we may track line
722 * numbers etc even after null() */
723 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
724 cop_free((COP*)o);
725
726 op_clear(o);
727
728#ifdef PL_OP_SLAB_ALLOC
729 if ((char *) o == PL_OpPtr)
730 {
731 }
732#else
733 Safefree(o);
734#endif
735}
79072805 736
acb36ea4
GS		 737STATIC void
738S_op_clear(pTHX_ OP *o)
739{
11343788 740 switch (o->op_type) {
acb36ea4
GS		 741 case OP_NULL: /* Was holding old type, if any. */
742 case OP_ENTEREVAL: /* Was holding hints. */
743#ifdef USE_THREADS
744 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
745#endif
746 o->op_targ = 0;
a0d0e21e 747 break;
554b3eca 748#ifdef USE_THREADS
8dd3ba40
SM		 749 case OP_ENTERITER:
750 if (!(o->op_flags & OPf_SPECIAL))
751 break;
752 /* FALL THROUGH */
554b3eca 753#endif /* USE_THREADS */
a6006777 754 default:
ac4c12e7 755 if (!(o->op_flags & OPf_REF)
0b94c7bb 756 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 757 break;
758 /* FALL THROUGH */
463ee0b2 759 case OP_GVSV:
79072805 760 case OP_GV:
a6006777 761 case OP_AELEMFAST:
350de78d 762#ifdef USE_ITHREADS
971a9dd3
GS		 763 if (cPADOPo->op_padix > 0) {
764 if (PL_curpad) {
638eceb6 765 GV *gv = cGVOPo_gv;
971a9dd3
GS		 766 pad_swipe(cPADOPo->op_padix);
767 /* No GvIN_PAD_off(gv) here, because other references may still
768 * exist on the pad */
769 SvREFCNT_dec(gv);
770 }
771 cPADOPo->op_padix = 0;
772 }
350de78d 773#else
971a9dd3 774 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 775 cSVOPo->op_sv = Nullsv;
350de78d 776#endif
79072805 777 break;
a1ae71d2 778 case OP_METHOD_NAMED:
79072805 779 case OP_CONST:
11343788 780 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 781 cSVOPo->op_sv = Nullsv;
79072805 782 break;
748a9306
LW		 783 case OP_GOTO:
784 case OP_NEXT:
785 case OP_LAST:
786 case OP_REDO:
11343788 787 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 788 break;
789 /* FALL THROUGH */
a0d0e21e 790 case OP_TRANS:
acb36ea4 791 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 792 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 793 cSVOPo->op_sv = Nullsv;
794 }
795 else {
a0ed51b3 796 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 797 cPVOPo->op_pv = Nullch;
798 }
a0d0e21e
LW		 799 break;
800 case OP_SUBST:
11343788 801 op_free(cPMOPo->op_pmreplroot);
971a9dd3 802 goto clear_pmop;
748a9306 803 case OP_PUSHRE:
971a9dd3
GS		 804#ifdef USE_ITHREADS
805 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
806 if (PL_curpad) {
807 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
808 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
809 /* No GvIN_PAD_off(gv) here, because other references may still
810 * exist on the pad */
811 SvREFCNT_dec(gv);
812 }
813 }
814#else
815 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
816#endif
817 /* FALL THROUGH */
a0d0e21e 818 case OP_MATCH:
8782bef2 819 case OP_QR:
971a9dd3
GS		 820clear_pmop:
821 cPMOPo->op_pmreplroot = Nullop;
c277df42 822 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 823 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 824 break;
79072805
LW		 825 }
826
743e66e6 827 if (o->op_targ > 0) {
11343788 828 pad_free(o->op_targ);
743e66e6
GS		 829 o->op_targ = 0;
830 }
79072805
LW		 831}
832
76e3520e 833STATIC void
3eb57f73
HS		 834S_cop_free(pTHX_ COP* cop)
835{
836 Safefree(cop->cop_label);
57843af0 837#ifdef USE_ITHREADS
f4dd75d9
GS		 838 Safefree(CopFILE(cop)); /* XXX share in a pvtable? */
839 Safefree(CopSTASHPV(cop)); /* XXX share in a pvtable? */
57843af0 840#else
11faa288 841 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 842 SvREFCNT_dec(CopFILEGV(cop));
57843af0 843#endif
0453d815 844 if (! specialWARN(cop->cop_warnings))
3eb57f73 845 SvREFCNT_dec(cop->cop_warnings);
ac27b0f5
NIS		 846 if (! specialCopIO(cop->cop_io))
847 SvREFCNT_dec(cop->cop_io);
3eb57f73
HS		 848}
849
850STATIC void
cea2e8a9 851S_null(pTHX_ OP *o)
8990e307 852{
acb36ea4
GS		 853 if (o->op_type == OP_NULL)
854 return;
855 op_clear(o);
11343788
MB		 856 o->op_targ = o->op_type;
857 o->op_type = OP_NULL;
22c35a8c 858 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 859}
860
79072805
LW		 861/* Contextualizers */
862
463ee0b2 863#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 864
865OP *
864dbfa3 866Perl_linklist(pTHX_ OP *o)
79072805
LW		 867{
868 register OP *kid;
869
11343788
MB		 870 if (o->op_next)
871 return o->op_next;
79072805
LW		 872
873 /* establish postfix order */
11343788
MB		 874 if (cUNOPo->op_first) {
875 o->op_next = LINKLIST(cUNOPo->op_first);
876 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 877 if (kid->op_sibling)
878 kid->op_next = LINKLIST(kid->op_sibling);
879 else
11343788 880 kid->op_next = o;
79072805
LW		 881 }
882 }
883 else
11343788 884 o->op_next = o;
79072805 885
11343788 886 return o->op_next;
79072805
LW		 887}
888
889OP *
864dbfa3 890Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 891{
892 OP *kid;
11343788
MB		 893 if (o && o->op_flags & OPf_KIDS) {
894 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 895 scalar(kid);
896 }
11343788 897 return o;
79072805
LW		 898}
899
76e3520e 900STATIC OP *
cea2e8a9 901S_scalarboolean(pTHX_ OP *o)
8990e307 902{
d008e5eb 903 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
d008e5eb 904 if (ckWARN(WARN_SYNTAX)) {
57843af0 905 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 906
d008e5eb 907 if (PL_copline != NOLINE)
57843af0 908 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 909 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 910 CopLINE_set(PL_curcop, oldline);
d008e5eb 911 }
a0d0e21e 912 }
11343788 913 return scalar(o);
8990e307
LW		 914}
915
916OP *
864dbfa3 917Perl_scalar(pTHX_ OP *o)
79072805
LW		 918{
919 OP *kid;
920
a0d0e21e 921 /* assumes no premature commitment */
3280af22 922 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 923 || o->op_type == OP_RETURN)
7e363e51 924 {
11343788 925 return o;
7e363e51 926 }
79072805 927
5dc0d613 928 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 929
11343788 930 switch (o->op_type) {
79072805 931 case OP_REPEAT:
11343788
MB		 932 if (o->op_private & OPpREPEAT_DOLIST)
933 null(((LISTOP*)cBINOPo->op_first)->op_first);
934 scalar(cBINOPo->op_first);
8990e307 935 break;
79072805
LW		 936 case OP_OR:
937 case OP_AND:
938 case OP_COND_EXPR:
11343788 939 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 940 scalar(kid);
79072805 941 break;
a0d0e21e 942 case OP_SPLIT:
11343788 943 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 944 if (!kPMOP->op_pmreplroot)
945 deprecate("implicit split to @_");
946 }
947 /* FALL THROUGH */
79072805 948 case OP_MATCH:
8782bef2 949 case OP_QR:
79072805
LW		 950 case OP_SUBST:
951 case OP_NULL:
8990e307 952 default:
11343788
MB		 953 if (o->op_flags & OPf_KIDS) {
954 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 955 scalar(kid);
956 }
79072805
LW		 957 break;
958 case OP_LEAVE:
959 case OP_LEAVETRY:
5dc0d613 960 kid = cLISTOPo->op_first;
54310121 961 scalar(kid);
155aba94 962 while ((kid = kid->op_sibling)) {
54310121 963 if (kid->op_sibling)
964 scalarvoid(kid);
965 else
966 scalar(kid);
967 }
3280af22 968 WITH_THR(PL_curcop = &PL_compiling);
54310121 969 break;
748a9306 970 case OP_SCOPE:
79072805 971 case OP_LINESEQ:
8990e307 972 case OP_LIST:
11343788 973 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 974 if (kid->op_sibling)
975 scalarvoid(kid);
976 else
977 scalar(kid);
978 }
3280af22 979 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 980 break;
981 }
11343788 982 return o;
79072805
LW		 983}
984
985OP *
864dbfa3 986Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 987{
988 OP *kid;
8990e307
LW		 989 char* useless = 0;
990 SV* sv;
2ebea0a1
GS		 991 U8 want;
992
acb36ea4
GS		 993 if (o->op_type == OP_NEXTSTATE
994 || o->op_type == OP_SETSTATE
995 || o->op_type == OP_DBSTATE
996 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
997 || o->op_targ == OP_SETSTATE
998 || o->op_targ == OP_DBSTATE)))
2ebea0a1 999 PL_curcop = (COP*)o; /* for warning below */
79072805 1000
54310121 1001 /* assumes no premature commitment */
2ebea0a1
GS		 1002 want = o->op_flags & OPf_WANT;
1003 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1004 || o->op_type == OP_RETURN)
7e363e51 1005 {
11343788 1006 return o;
7e363e51 1007 }
79072805 1008
b162f9ea 1009 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1010 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1011 {
b162f9ea 1012 return scalar(o); /* As if inside SASSIGN */
7e363e51 1013 }
1c846c1f 1014
5dc0d613 1015 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1016
11343788 1017 switch (o->op_type) {
79072805 1018 default:
22c35a8c 1019 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1020 break;
36477c24 1021 /* FALL THROUGH */
1022 case OP_REPEAT:
11343788 1023 if (o->op_flags & OPf_STACKED)
8990e307 1024 break;
5d82c453
GA		 1025 goto func_ops;
1026 case OP_SUBSTR:
1027 if (o->op_private == 4)
1028 break;
8990e307
LW		 1029 /* FALL THROUGH */
1030 case OP_GVSV:
1031 case OP_WANTARRAY:
1032 case OP_GV:
1033 case OP_PADSV:
1034 case OP_PADAV:
1035 case OP_PADHV:
1036 case OP_PADANY:
1037 case OP_AV2ARYLEN:
8990e307 1038 case OP_REF:
a0d0e21e
LW		 1039 case OP_REFGEN:
1040 case OP_SREFGEN:
8990e307
LW		 1041 case OP_DEFINED:
1042 case OP_HEX:
1043 case OP_OCT:
1044 case OP_LENGTH:
8990e307
LW		 1045 case OP_VEC:
1046 case OP_INDEX:
1047 case OP_RINDEX:
1048 case OP_SPRINTF:
1049 case OP_AELEM:
1050 case OP_AELEMFAST:
1051 case OP_ASLICE:
8990e307
LW		 1052 case OP_HELEM:
1053 case OP_HSLICE:
1054 case OP_UNPACK:
1055 case OP_PACK:
8990e307
LW		 1056 case OP_JOIN:
1057 case OP_LSLICE:
1058 case OP_ANONLIST:
1059 case OP_ANONHASH:
1060 case OP_SORT:
1061 case OP_REVERSE:
1062 case OP_RANGE:
1063 case OP_FLIP:
1064 case OP_FLOP:
1065 case OP_CALLER:
1066 case OP_FILENO:
1067 case OP_EOF:
1068 case OP_TELL:
1069 case OP_GETSOCKNAME:
1070 case OP_GETPEERNAME:
1071 case OP_READLINK:
1072 case OP_TELLDIR:
1073 case OP_GETPPID:
1074 case OP_GETPGRP:
1075 case OP_GETPRIORITY:
1076 case OP_TIME:
1077 case OP_TMS:
1078 case OP_LOCALTIME:
1079 case OP_GMTIME:
1080 case OP_GHBYNAME:
1081 case OP_GHBYADDR:
1082 case OP_GHOSTENT:
1083 case OP_GNBYNAME:
1084 case OP_GNBYADDR:
1085 case OP_GNETENT:
1086 case OP_GPBYNAME:
1087 case OP_GPBYNUMBER:
1088 case OP_GPROTOENT:
1089 case OP_GSBYNAME:
1090 case OP_GSBYPORT:
1091 case OP_GSERVENT:
1092 case OP_GPWNAM:
1093 case OP_GPWUID:
1094 case OP_GGRNAM:
1095 case OP_GGRGID:
1096 case OP_GETLOGIN:
5d82c453 1097 func_ops:
64aac5a9 1098 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1099 useless = PL_op_desc[o->op_type];
8990e307
LW		 1100 break;
1101
1102 case OP_RV2GV:
1103 case OP_RV2SV:
1104 case OP_RV2AV:
1105 case OP_RV2HV:
192587c2 1106 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1107 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1108 useless = "a variable";
1109 break;
79072805
LW		 1110
1111 case OP_CONST:
7766f137 1112 sv = cSVOPo_sv;
7a52d87a
GS		 1113 if (cSVOPo->op_private & OPpCONST_STRICT)
1114 no_bareword_allowed(o);
1115 else {
d008e5eb
GS		 1116 if (ckWARN(WARN_VOID)) {
1117 useless = "a constant";
1118 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1119 useless = 0;
1120 else if (SvPOK(sv)) {
1121 if (strnEQ(SvPVX(sv), "di", 2) ||
1122 strnEQ(SvPVX(sv), "ds", 2) ||
1123 strnEQ(SvPVX(sv), "ig", 2))
1124 useless = 0;
1125 }
8990e307
LW		 1126 }
1127 }
acb36ea4 1128 null(o); /* don't execute or even remember it */
79072805
LW		 1129 break;
1130
1131 case OP_POSTINC:
11343788 1132 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1133 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1134 break;
1135
1136 case OP_POSTDEC:
11343788 1137 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1138 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1139 break;
1140
79072805
LW		 1141 case OP_OR:
1142 case OP_AND:
1143 case OP_COND_EXPR:
11343788 1144 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1145 scalarvoid(kid);
1146 break;
5aabfad6 1147
a0d0e21e 1148 case OP_NULL:
11343788 1149 if (o->op_flags & OPf_STACKED)
a0d0e21e 1150 break;
5aabfad6 1151 /* FALL THROUGH */
2ebea0a1
GS		 1152 case OP_NEXTSTATE:
1153 case OP_DBSTATE:
79072805
LW		 1154 case OP_ENTERTRY:
1155 case OP_ENTER:
11343788 1156 if (!(o->op_flags & OPf_KIDS))
79072805 1157 break;
54310121 1158 /* FALL THROUGH */
463ee0b2 1159 case OP_SCOPE:
79072805
LW		 1160 case OP_LEAVE:
1161 case OP_LEAVETRY:
a0d0e21e 1162 case OP_LEAVELOOP:
79072805 1163 case OP_LINESEQ:
79072805 1164 case OP_LIST:
11343788 1165 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1166 scalarvoid(kid);
1167 break;
c90c0ff4 1168 case OP_ENTEREVAL:
5196be3e 1169 scalarkids(o);
c90c0ff4 1170 break;
5aabfad6 1171 case OP_REQUIRE:
c90c0ff4 1172 /* all requires must return a boolean value */
5196be3e 1173 o->op_flags &= ~OPf_WANT;
d6483035
GS		 1174 /* FALL THROUGH */
1175 case OP_SCALAR:
5196be3e 1176 return scalar(o);
a0d0e21e 1177 case OP_SPLIT:
11343788 1178 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1179 if (!kPMOP->op_pmreplroot)
1180 deprecate("implicit split to @_");
1181 }
1182 break;
79072805 1183 }
411caa50
JH		 1184 if (useless && ckWARN(WARN_VOID))
1185 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
11343788 1186 return o;
79072805
LW		 1187}
1188
1189OP *
864dbfa3 1190Perl_listkids(pTHX_ OP *o)
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)
79072805
LW		 1195 list(kid);
1196 }
11343788 1197 return o;
79072805
LW		 1198}
1199
1200OP *
864dbfa3 1201Perl_list(pTHX_ OP *o)
79072805
LW		 1202{
1203 OP *kid;
1204
a0d0e21e 1205 /* assumes no premature commitment */
3280af22 1206 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1207 || o->op_type == OP_RETURN)
7e363e51 1208 {
11343788 1209 return o;
7e363e51 1210 }
79072805 1211
b162f9ea 1212 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1213 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1214 {
b162f9ea 1215 return o; /* As if inside SASSIGN */
7e363e51 1216 }
1c846c1f 1217
5dc0d613 1218 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1219
11343788 1220 switch (o->op_type) {
79072805
LW		 1221 case OP_FLOP:
1222 case OP_REPEAT:
11343788 1223 list(cBINOPo->op_first);
79072805
LW		 1224 break;
1225 case OP_OR:
1226 case OP_AND:
1227 case OP_COND_EXPR:
11343788 1228 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1229 list(kid);
1230 break;
1231 default:
1232 case OP_MATCH:
8782bef2 1233 case OP_QR:
79072805
LW		 1234 case OP_SUBST:
1235 case OP_NULL:
11343788 1236 if (!(o->op_flags & OPf_KIDS))
79072805 1237 break;
11343788
MB		 1238 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1239 list(cBINOPo->op_first);
1240 return gen_constant_list(o);
79072805
LW		 1241 }
1242 case OP_LIST:
11343788 1243 listkids(o);
79072805
LW		 1244 break;
1245 case OP_LEAVE:
1246 case OP_LEAVETRY:
5dc0d613 1247 kid = cLISTOPo->op_first;
54310121 1248 list(kid);
155aba94 1249 while ((kid = kid->op_sibling)) {
54310121 1250 if (kid->op_sibling)
1251 scalarvoid(kid);
1252 else
1253 list(kid);
1254 }
3280af22 1255 WITH_THR(PL_curcop = &PL_compiling);
54310121 1256 break;
748a9306 1257 case OP_SCOPE:
79072805 1258 case OP_LINESEQ:
11343788 1259 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1260 if (kid->op_sibling)
1261 scalarvoid(kid);
1262 else
1263 list(kid);
1264 }
3280af22 1265 WITH_THR(PL_curcop = &PL_compiling);
79072805 1266 break;
c90c0ff4 1267 case OP_REQUIRE:
1268 /* all requires must return a boolean value */
5196be3e
MB		 1269 o->op_flags &= ~OPf_WANT;
1270 return scalar(o);
79072805 1271 }
11343788 1272 return o;
79072805
LW		 1273}
1274
1275OP *
864dbfa3 1276Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1277{
1278 OP *kid;
1279
11343788
MB		 1280 if (o) {
1281 if (o->op_type == OP_LINESEQ ||
1282 o->op_type == OP_SCOPE ||
1283 o->op_type == OP_LEAVE ||
1284 o->op_type == OP_LEAVETRY)
463ee0b2 1285 {
11343788 1286 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1287 if (kid->op_sibling) {
463ee0b2 1288 scalarvoid(kid);
ed6116ce 1289 }
463ee0b2 1290 }
3280af22 1291 PL_curcop = &PL_compiling;
79072805 1292 }
11343788 1293 o->op_flags &= ~OPf_PARENS;
3280af22 1294 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1295 o->op_flags |= OPf_PARENS;
79072805 1296 }
8990e307 1297 else
11343788
MB		 1298 o = newOP(OP_STUB, 0);
1299 return o;
79072805
LW		 1300}
1301
76e3520e 1302STATIC OP *
cea2e8a9 1303S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1304{
1305 OP *kid;
11343788
MB		 1306 if (o && o->op_flags & OPf_KIDS) {
1307 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1308 mod(kid, type);
79072805 1309 }
11343788 1310 return o;
79072805
LW		 1311}
1312
79072805 1313OP *
864dbfa3 1314Perl_mod(pTHX_ OP *o, I32 type)
79072805
LW		 1315{
1316 OP *kid;
2d8e6c8d 1317 STRLEN n_a;
79072805 1318
3280af22 1319 if (!o || PL_error_count)
11343788 1320 return o;
79072805 1321
b162f9ea 1322 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1323 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1324 {
b162f9ea 1325 return o;
7e363e51 1326 }
1c846c1f 1327
11343788 1328 switch (o->op_type) {
68dc0745 1329 case OP_UNDEF:
3280af22 1330 PL_modcount++;
5dc0d613 1331 return o;
a0d0e21e 1332 case OP_CONST:
11343788 1333 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1334 goto nomod;
3280af22 1335 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1336 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1337 PL_eval_start = 0;
a0d0e21e
LW		 1338 }
1339 else if (!type) {
3280af22
NIS		 1340 SAVEI32(PL_compiling.cop_arybase);
1341 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1342 }
1343 else if (type == OP_REFGEN)
1344 goto nomod;
1345 else
cea2e8a9 1346 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1347 break;
5f05dabc 1348 case OP_STUB:
5196be3e 1349 if (o->op_flags & OPf_PARENS)
5f05dabc 1350 break;
1351 goto nomod;
a0d0e21e
LW		 1352 case OP_ENTERSUB:
1353 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1354 !(o->op_flags & OPf_STACKED)) {
1355 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1356 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1357 assert(cUNOPo->op_first->op_type == OP_NULL);
1358 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1359 break;
1360 }
cd06dffe
GS		 1361 else { /* lvalue subroutine call */
1362 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1363 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1364 /* Backward compatibility mode: */
1365 o->op_private |= OPpENTERSUB_INARGS;
1366 break;
1367 }
1368 else { /* Compile-time error message: */
1369 OP *kid = cUNOPo->op_first;
1370 CV *cv;
1371 OP *okid;
1372
1373 if (kid->op_type == OP_PUSHMARK)
1374 goto skip_kids;
1375 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1376 Perl_croak(aTHX_
1377 "panic: unexpected lvalue entersub "
1378 "args: type/targ %ld:%ld",
1379 (long)kid->op_type,kid->op_targ);
1380 kid = kLISTOP->op_first;
1381 skip_kids:
1382 while (kid->op_sibling)
1383 kid = kid->op_sibling;
1384 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1385 /* Indirect call */
1386 if (kid->op_type == OP_METHOD_NAMED
1387 || kid->op_type == OP_METHOD)
1388 {
87d7fd28 1389 UNOP *newop;
cd06dffe
GS		 1390
1391 if (kid->op_sibling || kid->op_next != kid) {
1392 yyerror("panic: unexpected optree near method call");
1393 break;
1394 }
1395
87d7fd28 1396 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1397 newop->op_type = OP_RV2CV;
1398 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1399 newop->op_first = Nullop;
1400 newop->op_next = (OP*)newop;
1401 kid->op_sibling = (OP*)newop;
349fd7b7 1402 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1403 break;
1404 }
1c846c1f 1405
cd06dffe
GS		 1406 if (kid->op_type != OP_RV2CV)
1407 Perl_croak(aTHX_
1408 "panic: unexpected lvalue entersub "
1409 "entry via type/targ %ld:%ld",
1410 (long)kid->op_type,kid->op_targ);
1411 kid->op_private |= OPpLVAL_INTRO;
1412 break; /* Postpone until runtime */
1413 }
1414
1415 okid = kid;
1416 kid = kUNOP->op_first;
1417 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1418 kid = kUNOP->op_first;
1419 if (kid->op_type == OP_NULL)
1420 Perl_croak(aTHX_
1421 "Unexpected constant lvalue entersub "
1422 "entry via type/targ %ld:%ld",
1423 (long)kid->op_type,kid->op_targ);
1424 if (kid->op_type != OP_GV) {
1425 /* Restore RV2CV to check lvalueness */
1426 restore_2cv:
1427 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1428 okid->op_next = kid->op_next;
1429 kid->op_next = okid;
1430 }
1431 else
1432 okid->op_next = Nullop;
1433 okid->op_type = OP_RV2CV;
1434 okid->op_targ = 0;
1435 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1436 okid->op_private |= OPpLVAL_INTRO;
1437 break;
1438 }
1439
638eceb6 1440 cv = GvCV(kGVOP_gv);
1c846c1f 1441 if (!cv)
cd06dffe
GS		 1442 goto restore_2cv;
1443 if (CvLVALUE(cv))
1444 break;
1445 }
1446 }
79072805
LW		 1447 /* FALL THROUGH */
1448 default:
a0d0e21e
LW		 1449 nomod:
1450 /* grep, foreach, subcalls, refgen */
1451 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1452 break;
cea2e8a9 1453 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1454 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1455 ? "do block"
1456 : (o->op_type == OP_ENTERSUB
1457 ? "non-lvalue subroutine call"
1458 : PL_op_desc[o->op_type])),
22c35a8c 1459 type ? PL_op_desc[type] : "local"));
11343788 1460 return o;
79072805 1461
a0d0e21e
LW		 1462 case OP_PREINC:
1463 case OP_PREDEC:
1464 case OP_POW:
1465 case OP_MULTIPLY:
1466 case OP_DIVIDE:
1467 case OP_MODULO:
1468 case OP_REPEAT:
1469 case OP_ADD:
1470 case OP_SUBTRACT:
1471 case OP_CONCAT:
1472 case OP_LEFT_SHIFT:
1473 case OP_RIGHT_SHIFT:
1474 case OP_BIT_AND:
1475 case OP_BIT_XOR:
1476 case OP_BIT_OR:
1477 case OP_I_MULTIPLY:
1478 case OP_I_DIVIDE:
1479 case OP_I_MODULO:
1480 case OP_I_ADD:
1481 case OP_I_SUBTRACT:
11343788 1482 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1483 goto nomod;
3280af22 1484 PL_modcount++;
a0d0e21e
LW		 1485 break;
1486
79072805 1487 case OP_COND_EXPR:
11343788 1488 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1489 mod(kid, type);
79072805
LW		 1490 break;
1491
1492 case OP_RV2AV:
1493 case OP_RV2HV:
93af7a87 1494 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1495 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1496 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1497 PL_modcount = 10000;
11343788 1498 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1499 }
1500 /* FALL THROUGH */
79072805 1501 case OP_RV2GV:
5dc0d613 1502 if (scalar_mod_type(o, type))
3fe9a6f1 1503 goto nomod;
11343788 1504 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1505 /* FALL THROUGH */
1506 case OP_AASSIGN:
1507 case OP_ASLICE:
1508 case OP_HSLICE:
93a17b20
LW		 1509 case OP_NEXTSTATE:
1510 case OP_DBSTATE:
a0d0e21e
LW		 1511 case OP_REFGEN:
1512 case OP_CHOMP:
3280af22 1513 PL_modcount = 10000;
79072805 1514 break;
463ee0b2 1515 case OP_RV2SV:
11343788 1516 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1517 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1518 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1519 /* FALL THROUGH */
79072805 1520 case OP_GV:
463ee0b2 1521 case OP_AV2ARYLEN:
3280af22 1522 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1523 case OP_SASSIGN:
bf4b1e52
GS		 1524 case OP_ANDASSIGN:
1525 case OP_ORASSIGN:
8990e307 1526 case OP_AELEMFAST:
3280af22 1527 PL_modcount++;
8990e307
LW		 1528 break;
1529
748a9306
LW		 1530 case OP_PADAV:
1531 case OP_PADHV:
3280af22 1532 PL_modcount = 10000;
5196be3e
MB		 1533 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1534 return o; /* Treat \(@foo) like ordinary list. */
1535 if (scalar_mod_type(o, type))
3fe9a6f1 1536 goto nomod;
748a9306
LW		 1537 /* FALL THROUGH */
1538 case OP_PADSV:
3280af22 1539 PL_modcount++;
748a9306 1540 if (!type)
cea2e8a9 1541 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1542 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1543 break;
1544
554b3eca 1545#ifdef USE_THREADS
2faa37cc 1546 case OP_THREADSV:
533c011a 1547 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1548 break;
1549#endif /* USE_THREADS */
1550
748a9306
LW		 1551 case OP_PUSHMARK:
1552 break;
a0d0e21e 1553
69969c6f
SB		 1554 case OP_KEYS:
1555 if (type != OP_SASSIGN)
1556 goto nomod;
5d82c453
GA		 1557 goto lvalue_func;
1558 case OP_SUBSTR:
1559 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1560 goto nomod;
5f05dabc 1561 /* FALL THROUGH */
a0d0e21e 1562 case OP_POS:
463ee0b2 1563 case OP_VEC:
5d82c453 1564 lvalue_func:
11343788
MB		 1565 pad_free(o->op_targ);
1566 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1567 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1568 if (o->op_flags & OPf_KIDS)
1569 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1570 break;
a0d0e21e 1571
463ee0b2
LW		 1572 case OP_AELEM:
1573 case OP_HELEM:
11343788 1574 ref(cBINOPo->op_first, o->op_type);
68dc0745 1575 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1576 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1577 o->op_private |= OPpLVAL_DEFER;
3280af22 1578 PL_modcount++;
463ee0b2
LW		 1579 break;
1580
1581 case OP_SCOPE:
1582 case OP_LEAVE:
1583 case OP_ENTER:
11343788
MB		 1584 if (o->op_flags & OPf_KIDS)
1585 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1586 break;
1587
1588 case OP_NULL:
638bc118
GS		 1589 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1590 goto nomod;
1591 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1592 break;
11343788
MB		 1593 if (o->op_targ != OP_LIST) {
1594 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1595 break;
1596 }
1597 /* FALL THROUGH */
463ee0b2 1598 case OP_LIST:
11343788 1599 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1600 mod(kid, type);
1601 break;
1602 }
11343788 1603 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1604
1605 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1606 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1607 else if (!type) {
11343788
MB		 1608 o->op_private |= OPpLVAL_INTRO;
1609 o->op_flags &= ~OPf_SPECIAL;
3280af22 1610 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1611 }
a0d0e21e 1612 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1613 o->op_flags |= OPf_REF;
1614 return o;
463ee0b2
LW		 1615}
1616
864dbfa3 1617STATIC bool
cea2e8a9 1618S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1619{
1620 switch (type) {
1621 case OP_SASSIGN:
5196be3e 1622 if (o->op_type == OP_RV2GV)
3fe9a6f1 1623 return FALSE;
1624 /* FALL THROUGH */
1625 case OP_PREINC:
1626 case OP_PREDEC:
1627 case OP_POSTINC:
1628 case OP_POSTDEC:
1629 case OP_I_PREINC:
1630 case OP_I_PREDEC:
1631 case OP_I_POSTINC:
1632 case OP_I_POSTDEC:
1633 case OP_POW:
1634 case OP_MULTIPLY:
1635 case OP_DIVIDE:
1636 case OP_MODULO:
1637 case OP_REPEAT:
1638 case OP_ADD:
1639 case OP_SUBTRACT:
1640 case OP_I_MULTIPLY:
1641 case OP_I_DIVIDE:
1642 case OP_I_MODULO:
1643 case OP_I_ADD:
1644 case OP_I_SUBTRACT:
1645 case OP_LEFT_SHIFT:
1646 case OP_RIGHT_SHIFT:
1647 case OP_BIT_AND:
1648 case OP_BIT_XOR:
1649 case OP_BIT_OR:
1650 case OP_CONCAT:
1651 case OP_SUBST:
1652 case OP_TRANS:
49e9fbe6
GS		 1653 case OP_READ:
1654 case OP_SYSREAD:
1655 case OP_RECV:
bf4b1e52
GS		 1656 case OP_ANDASSIGN:
1657 case OP_ORASSIGN:
3fe9a6f1 1658 return TRUE;
1659 default:
1660 return FALSE;
1661 }
1662}
1663
35cd451c 1664STATIC bool
cea2e8a9 1665S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1666{
1667 switch (o->op_type) {
1668 case OP_PIPE_OP:
1669 case OP_SOCKPAIR:
1670 if (argnum == 2)
1671 return TRUE;
1672 /* FALL THROUGH */
1673 case OP_SYSOPEN:
1674 case OP_OPEN:
ded8aa31 1675 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1676 case OP_SOCKET:
1677 case OP_OPEN_DIR:
1678 case OP_ACCEPT:
1679 if (argnum == 1)
1680 return TRUE;
1681 /* FALL THROUGH */
1682 default:
1683 return FALSE;
1684 }
1685}
1686
463ee0b2 1687OP *
864dbfa3 1688Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1689{
1690 OP *kid;
11343788
MB		 1691 if (o && o->op_flags & OPf_KIDS) {
1692 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1693 ref(kid, type);
1694 }
11343788 1695 return o;
463ee0b2
LW		 1696}
1697
1698OP *
864dbfa3 1699Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1700{
1701 OP *kid;
463ee0b2 1702
3280af22 1703 if (!o || PL_error_count)
11343788 1704 return o;
463ee0b2 1705
11343788 1706 switch (o->op_type) {
a0d0e21e 1707 case OP_ENTERSUB:
afebc493 1708 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1709 !(o->op_flags & OPf_STACKED)) {
1710 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1711 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1712 assert(cUNOPo->op_first->op_type == OP_NULL);
1713 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1714 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1715 }
1716 break;
aeea060c 1717
463ee0b2 1718 case OP_COND_EXPR:
11343788 1719 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1720 ref(kid, type);
1721 break;
8990e307 1722 case OP_RV2SV:
35cd451c
GS		 1723 if (type == OP_DEFINED)
1724 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1725 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1726 /* FALL THROUGH */
1727 case OP_PADSV:
5f05dabc 1728 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1729 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1730 : type == OP_RV2HV ? OPpDEREF_HV
1731 : OPpDEREF_SV);
11343788 1732 o->op_flags |= OPf_MOD;
a0d0e21e 1733 }
8990e307 1734 break;
1c846c1f 1735
2faa37cc 1736 case OP_THREADSV:
a863c7d1
MB		 1737 o->op_flags |= OPf_MOD; /* XXX ??? */
1738 break;
1739
463ee0b2
LW		 1740 case OP_RV2AV:
1741 case OP_RV2HV:
aeea060c 1742 o->op_flags |= OPf_REF;
8990e307 1743 /* FALL THROUGH */
463ee0b2 1744 case OP_RV2GV:
35cd451c
GS		 1745 if (type == OP_DEFINED)
1746 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1747 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1748 break;
8990e307 1749
463ee0b2
LW		 1750 case OP_PADAV:
1751 case OP_PADHV:
aeea060c 1752 o->op_flags |= OPf_REF;
79072805 1753 break;
aeea060c 1754
8990e307 1755 case OP_SCALAR:
79072805 1756 case OP_NULL:
11343788 1757 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1758 break;
11343788 1759 ref(cBINOPo->op_first, type);
79072805
LW		 1760 break;
1761 case OP_AELEM:
1762 case OP_HELEM:
11343788 1763 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1764 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1765 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1766 : type == OP_RV2HV ? OPpDEREF_HV
1767 : OPpDEREF_SV);
11343788 1768 o->op_flags |= OPf_MOD;
8990e307 1769 }
79072805
LW		 1770 break;
1771
463ee0b2 1772 case OP_SCOPE:
79072805
LW		 1773 case OP_LEAVE:
1774 case OP_ENTER:
8990e307 1775 case OP_LIST:
11343788 1776 if (!(o->op_flags & OPf_KIDS))
79072805 1777 break;
11343788 1778 ref(cLISTOPo->op_last, type);
79072805 1779 break;
a0d0e21e
LW		 1780 default:
1781 break;
79072805 1782 }
11343788 1783 return scalar(o);
8990e307 1784
79072805
LW		 1785}
1786
09bef843
SB		 1787STATIC OP *
1788S_dup_attrlist(pTHX_ OP *o)
1789{
1790 OP *rop = Nullop;
1791
1792 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1793 * where the first kid is OP_PUSHMARK and the remaining ones
1794 * are OP_CONST. We need to push the OP_CONST values.
1795 */
1796 if (o->op_type == OP_CONST)
1797 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1798 else {
1799 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1800 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1801 if (o->op_type == OP_CONST)
1802 rop = append_elem(OP_LIST, rop,
1803 newSVOP(OP_CONST, o->op_flags,
1804 SvREFCNT_inc(cSVOPo->op_sv)));
1805 }
1806 }
1807 return rop;
1808}
1809
1810STATIC void
1811S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1812{
09bef843
SB		 1813 SV *stashsv;
1814
1815 /* fake up C<use attributes $pkg,$rv,@attrs> */
1816 ENTER; /* need to protect against side-effects of 'use' */
1817 SAVEINT(PL_expect);
1818 if (stash && HvNAME(stash))
1819 stashsv = newSVpv(HvNAME(stash), 0);
1820 else
1821 stashsv = &PL_sv_no;
e4783991 1822
09bef843 1823#define ATTRSMODULE "attributes"
e4783991
GS		 1824
1825 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1826 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1827 Nullsv,
1828 prepend_elem(OP_LIST,
1829 newSVOP(OP_CONST, 0, stashsv),
1830 prepend_elem(OP_LIST,
1831 newSVOP(OP_CONST, 0,
1832 newRV(target)),
1833 dup_attrlist(attrs))));
09bef843
SB		 1834 LEAVE;
1835}
1836
be3174d2
GS		 1837void
1838Perl_apply_attrs_string(pTHX_ char *stashpv, CV *cv,
1839 char *attrstr, STRLEN len)
1840{
1841 OP *attrs = Nullop;
1842
1843 if (!len) {
1844 len = strlen(attrstr);
1845 }
1846
1847 while (len) {
1848 for (; isSPACE(*attrstr) && len; --len, ++attrstr) ;
1849 if (len) {
1850 char *sstr = attrstr;
1851 for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ;
1852 attrs = append_elem(OP_LIST, attrs,
1853 newSVOP(OP_CONST, 0,
1854 newSVpvn(sstr, attrstr-sstr)));
1855 }
1856 }
1857
1858 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1859 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1860 Nullsv, prepend_elem(OP_LIST,
1861 newSVOP(OP_CONST, 0, newSVpv(stashpv,0)),
1862 prepend_elem(OP_LIST,
1863 newSVOP(OP_CONST, 0,
1864 newRV((SV*)cv)),
1865 attrs)));
1866}
1867
09bef843
SB		 1868STATIC OP *
1869S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1870{
1871 OP *kid;
93a17b20
LW		 1872 I32 type;
1873
3280af22 1874 if (!o || PL_error_count)
11343788 1875 return o;
93a17b20 1876
11343788 1877 type = o->op_type;
93a17b20 1878 if (type == OP_LIST) {
11343788 1879 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1880 my_kid(kid, attrs);
dab48698 1881 } else if (type == OP_UNDEF) {
7766148a 1882 return o;
77ca0c92
LW		 1883 } else if (type == OP_RV2SV || /* "our" declaration */
1884 type == OP_RV2AV ||
1885 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1886 o->op_private |= OPpOUR_INTRO;
77ca0c92 1887 return o;
dab48698 1888 } else if (type != OP_PADSV &&
93a17b20
LW		 1889 type != OP_PADAV &&
1890 type != OP_PADHV &&
1891 type != OP_PUSHMARK)
1892 {
eb64745e
GS		 1893 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1894 PL_op_desc[o->op_type],
1895 PL_in_my == KEY_our ? "our" : "my"));
11343788 1896 return o;
93a17b20 1897 }
09bef843
SB		 1898 else if (attrs && type != OP_PUSHMARK) {
1899 HV *stash;
1900 SV *padsv;
1901 SV **namesvp;
1902
eb64745e
GS		 1903 PL_in_my = FALSE;
1904 PL_in_my_stash = Nullhv;
1905
09bef843
SB		 1906 /* check for C<my Dog $spot> when deciding package */
1907 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1908 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1909 stash = SvSTASH(*namesvp);
1910 else
1911 stash = PL_curstash;
1912 padsv = PAD_SV(o->op_targ);
1913 apply_attrs(stash, padsv, attrs);
1914 }
11343788
MB		 1915 o->op_flags |= OPf_MOD;
1916 o->op_private |= OPpLVAL_INTRO;
1917 return o;
93a17b20
LW		 1918}
1919
1920OP *
09bef843
SB		 1921Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1922{
1923 if (o->op_flags & OPf_PARENS)
1924 list(o);
09bef843
SB		 1925 if (attrs)
1926 SAVEFREEOP(attrs);
eb64745e
GS		 1927 o = my_kid(o, attrs);
1928 PL_in_my = FALSE;
1929 PL_in_my_stash = Nullhv;
1930 return o;
09bef843
SB		 1931}
1932
1933OP *
1934Perl_my(pTHX_ OP *o)
1935{
1936 return my_kid(o, Nullop);
1937}
1938
1939OP *
864dbfa3 1940Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1941{
1942 if (o)
1943 o->op_flags |= OPf_PARENS;
1944 return o;
1945}
1946
1947OP *
864dbfa3 1948Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1949{
11343788 1950 OP *o;
79072805 1951
e476b1b5 1952 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1953 (left->op_type == OP_RV2AV ||
1954 left->op_type == OP_RV2HV ||
1955 left->op_type == OP_PADAV ||
1956 left->op_type == OP_PADHV)) {
22c35a8c 1957 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1958 right->op_type == OP_TRANS)
1959 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1960 const char *sample = ((left->op_type == OP_RV2AV ||
1961 left->op_type == OP_PADAV)
1962 ? "@array" : "%hash");
e476b1b5 1963 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 1964 "Applying %s to %s will act on scalar(%s)",
599cee73 1965 desc, sample, sample);
2ae324a7 1966 }
1967
de4bf5b3
MG		 1968 if (!(right->op_flags & OPf_STACKED) &&
1969 (right->op_type == OP_MATCH ||
79072805 1970 right->op_type == OP_SUBST ||
de4bf5b3 1971 right->op_type == OP_TRANS)) {
79072805 1972 right->op_flags |= OPf_STACKED;
d897a58d
MG		 1973 if (right->op_type != OP_MATCH &&
1974 ! (right->op_type == OP_TRANS &&
1975 right->op_private & OPpTRANS_IDENTICAL))
463ee0b2 1976 left = mod(left, right->op_type);
79072805 1977 if (right->op_type == OP_TRANS)
11343788 1978 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1979 else
11343788 1980 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1981 if (type == OP_NOT)
11343788
MB		 1982 return newUNOP(OP_NOT, 0, scalar(o));
1983 return o;
79072805
LW		 1984 }
1985 else
1986 return bind_match(type, left,
1987 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1988}
1989
1990OP *
864dbfa3 1991Perl_invert(pTHX_ OP *o)
79072805 1992{
11343788
MB		 1993 if (!o)
1994 return o;
79072805 1995 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1996 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1997}
1998
1999OP *
864dbfa3 2000Perl_scope(pTHX_ OP *o)
79072805
LW		 2001{
2002 if (o) {
3280af22 2003 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 2004 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
2005 o->op_type = OP_LEAVE;
22c35a8c 2006 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2007 }
2008 else {
2009 if (o->op_type == OP_LINESEQ) {
2010 OP *kid;
2011 o->op_type = OP_SCOPE;
22c35a8c 2012 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2013 kid = ((LISTOP*)o)->op_first;
2014 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
2015 null(kid);
463ee0b2
LW		 2016 }
2017 else
748a9306 2018 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2019 }
79072805
LW		 2020 }
2021 return o;
2022}
2023
b3ac6de7 2024void
864dbfa3 2025Perl_save_hints(pTHX)
b3ac6de7 2026{
3280af22
NIS		 2027 SAVEI32(PL_hints);
2028 SAVESPTR(GvHV(PL_hintgv));
2029 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2030 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2031}
2032
a0d0e21e 2033int
864dbfa3 2034Perl_block_start(pTHX_ int full)
79072805 2035{
3280af22 2036 int retval = PL_savestack_ix;
b3ac6de7 2037
3280af22 2038 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2039 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2040 if (full)
2041 PL_comppad_name_fill = PL_comppad_name_floor;
2042 if (PL_comppad_name_floor < 0)
2043 PL_comppad_name_floor = 0;
3280af22
NIS		 2044 SAVEI32(PL_min_intro_pending);
2045 SAVEI32(PL_max_intro_pending);
2046 PL_min_intro_pending = 0;
2047 SAVEI32(PL_comppad_name_fill);
2048 SAVEI32(PL_padix_floor);
2049 PL_padix_floor = PL_padix;
2050 PL_pad_reset_pending = FALSE;
b3ac6de7 2051 SAVEHINTS();
3280af22 2052 PL_hints &= ~HINT_BLOCK_SCOPE;
1c846c1f 2053 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2054 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2055 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2056 SAVEFREESV(PL_compiling.cop_warnings) ;
2057 }
ac27b0f5
NIS		 2058 SAVESPTR(PL_compiling.cop_io);
2059 if (! specialCopIO(PL_compiling.cop_io)) {
2060 PL_compiling.cop_io = newSVsv(PL_compiling.cop_io) ;
2061 SAVEFREESV(PL_compiling.cop_io) ;
2062 }
a0d0e21e
LW		 2063 return retval;
2064}
2065
2066OP*
864dbfa3 2067Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2068{
3280af22 2069 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2070 OP* retval = scalarseq(seq);
a0d0e21e 2071 LEAVE_SCOPE(floor);
3280af22 2072 PL_pad_reset_pending = FALSE;
e24b16f9 2073 PL_compiling.op_private = PL_hints;
a0d0e21e 2074 if (needblockscope)
3280af22
NIS		 2075 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2076 pad_leavemy(PL_comppad_name_fill);
2077 PL_cop_seqmax++;
a0d0e21e
LW		 2078 return retval;
2079}
2080
76e3520e 2081STATIC OP *
cea2e8a9 2082S_newDEFSVOP(pTHX)
54b9620d
MB		 2083{
2084#ifdef USE_THREADS
2085 OP *o = newOP(OP_THREADSV, 0);
2086 o->op_targ = find_threadsv("_");
2087 return o;
2088#else
3280af22 2089 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2090#endif /* USE_THREADS */
2091}
2092
a0d0e21e 2093void
864dbfa3 2094Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2095{
3280af22 2096 if (PL_in_eval) {
b295d113
TH		 2097 if (PL_eval_root)
2098 return;
faef0170
HS		 2099 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2100 ((PL_in_eval & EVAL_KEEPERR)
2101 ? OPf_SPECIAL : 0), o);
3280af22 2102 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2103 PL_eval_root->op_private |= OPpREFCOUNTED;
2104 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2105 PL_eval_root->op_next = 0;
2106 peep(PL_eval_start);
a0d0e21e
LW		 2107 }
2108 else {
5dc0d613 2109 if (!o)
a0d0e21e 2110 return;
3280af22
NIS		 2111 PL_main_root = scope(sawparens(scalarvoid(o)));
2112 PL_curcop = &PL_compiling;
2113 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2114 PL_main_root->op_private |= OPpREFCOUNTED;
2115 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2116 PL_main_root->op_next = 0;
2117 peep(PL_main_start);
2118 PL_compcv = 0;
3841441e 2119
4fdae800 2120 /* Register with debugger */
84902520 2121 if (PERLDB_INTER) {
864dbfa3 2122 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2123 if (cv) {
2124 dSP;
924508f0 2125 PUSHMARK(SP);
cc49e20b 2126 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2127 PUTBACK;
864dbfa3 2128 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2129 }
2130 }
79072805 2131 }
79072805
LW		 2132}
2133
2134OP *
864dbfa3 2135Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2136{
2137 if (o->op_flags & OPf_PARENS)
2138 list(o);
8990e307 2139 else {
599cee73 2140 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2141 char *s;
834a4ddd 2142 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2143 if (*s == ';' || *s == '=')
eb64745e
GS		 2144 Perl_warner(aTHX_ WARN_PARENTHESIS,
2145 "Parentheses missing around \"%s\" list",
2146 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2147 }
2148 }
93a17b20 2149 if (lex)
eb64745e 2150 o = my(o);
93a17b20 2151 else
eb64745e
GS		 2152 o = mod(o, OP_NULL); /* a bit kludgey */
2153 PL_in_my = FALSE;
2154 PL_in_my_stash = Nullhv;
2155 return o;
79072805
LW		 2156}
2157
2158OP *
864dbfa3 2159Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2160{
2161 if (o->op_type == OP_LIST) {
554b3eca
MB		 2162 OP *o2;
2163#ifdef USE_THREADS
2faa37cc 2164 o2 = newOP(OP_THREADSV, 0);
54b9620d 2165 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2166#else
2167 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2168#endif /* USE_THREADS */
2169 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2170 }
2171 return o;
2172}
2173
2174OP *
864dbfa3 2175Perl_fold_constants(pTHX_ register OP *o)
79072805
LW		 2176{
2177 register OP *curop;
2178 I32 type = o->op_type;
748a9306 2179 SV *sv;
79072805 2180
22c35a8c 2181 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2182 scalar(o);
b162f9ea 2183 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2184 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2185
eac055e9
GS		 2186 /* integerize op, unless it happens to be C<-foo>.
2187 * XXX should pp_i_negate() do magic string negation instead? */
2188 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2189 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2190 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2191 {
22c35a8c 2192 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2193 }
85e6fe83 2194
22c35a8c 2195 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2196 goto nope;
2197
de939608 2198 switch (type) {
7a52d87a
GS		 2199 case OP_NEGATE:
2200 /* XXX might want a ck_negate() for this */
2201 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2202 break;
de939608
CS		 2203 case OP_SPRINTF:
2204 case OP_UCFIRST:
2205 case OP_LCFIRST:
2206 case OP_UC:
2207 case OP_LC:
69dcf70c
MB		 2208 case OP_SLT:
2209 case OP_SGT:
2210 case OP_SLE:
2211 case OP_SGE:
2212 case OP_SCMP:
2213
de939608
CS		 2214 if (o->op_private & OPpLOCALE)
2215 goto nope;
2216 }
2217
3280af22 2218 if (PL_error_count)
a0d0e21e
LW		 2219 goto nope; /* Don't try to run w/ errors */
2220
79072805 2221 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2222 if ((curop->op_type != OP_CONST ||
2223 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2224 curop->op_type != OP_LIST &&
2225 curop->op_type != OP_SCALAR &&
2226 curop->op_type != OP_NULL &&
2227 curop->op_type != OP_PUSHMARK)
2228 {
79072805
LW		 2229 goto nope;
2230 }
2231 }
2232
2233 curop = LINKLIST(o);
2234 o->op_next = 0;
533c011a 2235 PL_op = curop;
cea2e8a9 2236 CALLRUNOPS(aTHX);
3280af22 2237 sv = *(PL_stack_sp--);
748a9306 2238 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2239 pad_swipe(o->op_targ);
748a9306
LW		 2240 else if (SvTEMP(sv)) { /* grab mortal temp? */
2241 (void)SvREFCNT_inc(sv);
2242 SvTEMP_off(sv);
85e6fe83 2243 }
79072805
LW		 2244 op_free(o);
2245 if (type == OP_RV2GV)
b1cb66bf 2246 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2247 else {
ee580363
GS		 2248 /* try to smush double to int, but don't smush -2.0 to -2 */
2249 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2250 type != OP_NEGATE)
2251 {
748a9306 2252 IV iv = SvIV(sv);
65202027 2253 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2254 SvREFCNT_dec(sv);
2255 sv = newSViv(iv);
2256 }
b1cb66bf 2257 else
2258 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2259 }
2260 return newSVOP(OP_CONST, 0, sv);
2261 }
aeea060c 2262
79072805 2263 nope:
22c35a8c 2264 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2265 return o;
79072805 2266
3280af22 2267 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2268 if (type == OP_MODULO
2269 || type == OP_DIVIDE
2270 || !(o->op_flags & OPf_KIDS))
2271 {
85e6fe83 2272 return o;
4bb9f687 2273 }
85e6fe83
LW		 2274
2275 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2276 if (curop->op_type == OP_CONST) {
b1cb66bf 2277 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2278 continue;
2279 return o;
2280 }
22c35a8c 2281 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2282 continue;
2283 return o;
2284 }
22c35a8c 2285 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2286 }
2287
79072805
LW		 2288 return o;
2289}
2290
2291OP *
864dbfa3 2292Perl_gen_constant_list(pTHX_ register OP *o)
79072805
LW		 2293{
2294 register OP *curop;
3280af22 2295 I32 oldtmps_floor = PL_tmps_floor;
79072805 2296
a0d0e21e 2297 list(o);
3280af22 2298 if (PL_error_count)
a0d0e21e
LW		 2299 return o; /* Don't attempt to run with errors */
2300
533c011a 2301 PL_op = curop = LINKLIST(o);
a0d0e21e 2302 o->op_next = 0;
7d4045d4 2303 peep(curop);
cea2e8a9
GS		 2304 pp_pushmark();
2305 CALLRUNOPS(aTHX);
533c011a 2306 PL_op = curop;
cea2e8a9 2307 pp_anonlist();
3280af22 2308 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2309
2310 o->op_type = OP_RV2AV;
22c35a8c 2311 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2312 curop = ((UNOP*)o)->op_first;
3280af22 2313 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2314 op_free(curop);
79072805
LW		 2315 linklist(o);
2316 return list(o);
2317}
2318
2319OP *
864dbfa3 2320Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2321{
2322 OP *kid;
a0d0e21e 2323 OP *last = 0;
79072805 2324
11343788
MB		 2325 if (!o || o->op_type != OP_LIST)
2326 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2327 else
5dc0d613 2328 o->op_flags &= ~OPf_WANT;
79072805 2329
22c35a8c 2330 if (!(PL_opargs[type] & OA_MARK))
11343788 2331 null(cLISTOPo->op_first);
8990e307 2332
11343788 2333 o->op_type = type;
22c35a8c 2334 o->op_ppaddr = PL_ppaddr[type];
11343788 2335 o->op_flags |= flags;
79072805 2336
11343788
MB		 2337 o = CHECKOP(type, o);
2338 if (o->op_type != type)
2339 return o;
79072805 2340
11343788 2341 if (cLISTOPo->op_children < 7) {
79072805 2342 /* XXX do we really need to do this if we're done appending?? */
11343788 2343 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2344 last = kid;
11343788 2345 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2346 }
2347
11343788 2348 return fold_constants(o);
79072805
LW		 2349}
2350
2351/* List constructors */
2352
2353OP *
864dbfa3 2354Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2355{
2356 if (!first)
2357 return last;
8990e307
LW		 2358
2359 if (!last)
79072805 2360 return first;
8990e307 2361
155aba94
GS		 2362 if (first->op_type != type
2363 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2364 {
2365 return newLISTOP(type, 0, first, last);
2366 }
79072805 2367
a0d0e21e
LW		 2368 if (first->op_flags & OPf_KIDS)
2369 ((LISTOP*)first)->op_last->op_sibling = last;
2370 else {
2371 first->op_flags |= OPf_KIDS;
2372 ((LISTOP*)first)->op_first = last;
2373 }
2374 ((LISTOP*)first)->op_last = last;
2375 ((LISTOP*)first)->op_children++;
2376 return first;
79072805
LW		 2377}
2378
2379OP *
864dbfa3 2380Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2381{
2382 if (!first)
2383 return (OP*)last;
8990e307
LW		 2384
2385 if (!last)
79072805 2386 return (OP*)first;
8990e307
LW		 2387
2388 if (first->op_type != type)
79072805 2389 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2390
2391 if (last->op_type != type)
79072805
LW		 2392 return append_elem(type, (OP*)first, (OP*)last);
2393
2394 first->op_last->op_sibling = last->op_first;
2395 first->op_last = last->op_last;
2396 first->op_children += last->op_children;
2397 if (first->op_children)
acb74605 2398 first->op_flags |= OPf_KIDS;
1c846c1f 2399
b7dc083c
NIS		 2400#ifdef PL_OP_SLAB_ALLOC
2401#else
1c846c1f 2402 Safefree(last);
b7dc083c 2403#endif
79072805
LW		 2404 return (OP*)first;
2405}
2406
2407OP *
864dbfa3 2408Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2409{
2410 if (!first)
2411 return last;
8990e307
LW		 2412
2413 if (!last)
79072805 2414 return first;
8990e307
LW		 2415
2416 if (last->op_type == type) {
2417 if (type == OP_LIST) { /* already a PUSHMARK there */
2418 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2419 ((LISTOP*)last)->op_first->op_sibling = first;
2420 }
2421 else {
2422 if (!(last->op_flags & OPf_KIDS)) {
2423 ((LISTOP*)last)->op_last = first;
2424 last->op_flags |= OPf_KIDS;
2425 }
2426 first->op_sibling = ((LISTOP*)last)->op_first;
2427 ((LISTOP*)last)->op_first = first;
79072805 2428 }
79072805
LW		 2429 ((LISTOP*)last)->op_children++;
2430 return last;
2431 }
2432
2433 return newLISTOP(type, 0, first, last);
2434}
2435
2436/* Constructors */
2437
2438OP *
864dbfa3 2439Perl_newNULLLIST(pTHX)
79072805 2440{
8990e307
LW		 2441 return newOP(OP_STUB, 0);
2442}
2443
2444OP *
864dbfa3 2445Perl_force_list(pTHX_ OP *o)
8990e307 2446{
11343788
MB		 2447 if (!o || o->op_type != OP_LIST)
2448 o = newLISTOP(OP_LIST, 0, o, Nullop);
2449 null(o);
2450 return o;
79072805
LW		 2451}
2452
2453OP *
864dbfa3 2454Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2455{
2456 LISTOP *listop;
2457
b7dc083c 2458 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2459
2460 listop->op_type = type;
22c35a8c 2461 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2462 listop->op_children = (first != 0) + (last != 0);
2463 listop->op_flags = flags;
79072805
LW		 2464
2465 if (!last && first)
2466 last = first;
2467 else if (!first && last)
2468 first = last;
8990e307
LW		 2469 else if (first)
2470 first->op_sibling = last;
79072805
LW		 2471 listop->op_first = first;
2472 listop->op_last = last;
8990e307
LW		 2473 if (type == OP_LIST) {
2474 OP* pushop;
2475 pushop = newOP(OP_PUSHMARK, 0);
2476 pushop->op_sibling = first;
2477 listop->op_first = pushop;
2478 listop->op_flags |= OPf_KIDS;
2479 if (!last)
2480 listop->op_last = pushop;
2481 }
2482 else if (listop->op_children)
2483 listop->op_flags |= OPf_KIDS;
79072805
LW		 2484
2485 return (OP*)listop;
2486}
2487
2488OP *
864dbfa3 2489Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2490{
11343788 2491 OP *o;
b7dc083c 2492 NewOp(1101, o, 1, OP);
11343788 2493 o->op_type = type;
22c35a8c 2494 o->op_ppaddr = PL_ppaddr[type];
11343788 2495 o->op_flags = flags;
79072805 2496
11343788
MB		 2497 o->op_next = o;
2498 o->op_private = 0 + (flags >> 8);
22c35a8c 2499 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2500 scalar(o);
22c35a8c 2501 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2502 o->op_targ = pad_alloc(type, SVs_PADTMP);
2503 return CHECKOP(type, o);
79072805
LW		 2504}
2505
2506OP *
864dbfa3 2507Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2508{
2509 UNOP *unop;
2510
93a17b20 2511 if (!first)
aeea060c 2512 first = newOP(OP_STUB, 0);
22c35a8c 2513 if (PL_opargs[type] & OA_MARK)
8990e307 2514 first = force_list(first);
93a17b20 2515
b7dc083c 2516 NewOp(1101, unop, 1, UNOP);
79072805 2517 unop->op_type = type;
22c35a8c 2518 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2519 unop->op_first = first;
2520 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2521 unop->op_private = 1 | (flags >> 8);
e50aee73 2522 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2523 if (unop->op_next)
2524 return (OP*)unop;
2525
a0d0e21e 2526 return fold_constants((OP *) unop);
79072805
LW		 2527}
2528
2529OP *
864dbfa3 2530Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2531{
2532 BINOP *binop;
b7dc083c 2533 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2534
2535 if (!first)
2536 first = newOP(OP_NULL, 0);
2537
2538 binop->op_type = type;
22c35a8c 2539 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2540 binop->op_first = first;
2541 binop->op_flags = flags | OPf_KIDS;
2542 if (!last) {
2543 last = first;
c07a80fd 2544 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2545 }
2546 else {
c07a80fd 2547 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2548 first->op_sibling = last;
2549 }
2550
e50aee73 2551 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2552 if (binop->op_next || binop->op_type != type)
79072805
LW		 2553 return (OP*)binop;
2554
7284ab6f 2555 binop->op_last = binop->op_first->op_sibling;
79072805 2556
a0d0e21e 2557 return fold_constants((OP *)binop);
79072805
LW		 2558}
2559
a0ed51b3
LW		 2560static int
2561utf8compare(const void *a, const void *b)
2562{
2563 int i;
2564 for (i = 0; i < 10; i++) {
2565 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2566 return -1;
2567 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2568 return 1;
2569 }
2570 return 0;
2571}
2572
79072805 2573OP *
864dbfa3 2574Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2575{
79072805
LW		 2576 SV *tstr = ((SVOP*)expr)->op_sv;
2577 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2578 STRLEN tlen;
2579 STRLEN rlen;
ec49126f 2580 register U8 *t = (U8*)SvPV(tstr, tlen);
2581 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2582 register I32 i;
2583 register I32 j;
a0ed51b3 2584 I32 del;
79072805 2585 I32 complement;
5d06d08e 2586 I32 squash;
79072805
LW		 2587 register short *tbl;
2588
11343788 2589 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2590 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2591 squash = o->op_private & OPpTRANS_SQUASH;
1c846c1f 2592
036b4402
GS		 2593 if (SvUTF8(tstr))
2594 o->op_private |= OPpTRANS_FROM_UTF;
1c846c1f
NIS		 2595
2596 if (SvUTF8(rstr))
036b4402 2597 o->op_private |= OPpTRANS_TO_UTF;
79072805 2598
a0ed51b3 2599 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2600 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2601 SV* transv = 0;
2602 U8* tend = t + tlen;
2603 U8* rend = r + rlen;
ba210ebe 2604 STRLEN ulen;
a0ed51b3
LW		 2605 U32 tfirst = 1;
2606 U32 tlast = 0;
2607 I32 tdiff;
2608 U32 rfirst = 1;
2609 U32 rlast = 0;
2610 I32 rdiff;
2611 I32 diff;
2612 I32 none = 0;
2613 U32 max = 0;
2614 I32 bits;
2615 I32 grows = 0;
2616 I32 havefinal = 0;
2617 U32 final;
a0ed51b3
LW		 2618 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2619 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2620
2621 if (complement) {
ad391ad9 2622 U8 tmpbuf[UTF8_MAXLEN+1];
a0ed51b3 2623 U8** cp;
ba210ebe 2624 I32* cl;
a0ed51b3
LW		 2625 UV nextmin = 0;
2626 New(1109, cp, tlen, U8*);
2627 i = 0;
79cb57f6 2628 transv = newSVpvn("",0);
a0ed51b3
LW		 2629 while (t < tend) {
2630 cp[i++] = t;
2631 t += UTF8SKIP(t);
2632 if (*t == 0xff) {
2633 t++;
2634 t += UTF8SKIP(t);
2635 }
2636 }
2637 qsort(cp, i, sizeof(U8*), utf8compare);
2638 for (j = 0; j < i; j++) {
2639 U8 *s = cp[j];
ba210ebe 2640 I32 cur = j < i ? cp[j+1] - s : tend - s;
dcad2880 2641 UV val = utf8_to_uv(s, cur, &ulen, 0);
a0ed51b3
LW		 2642 s += ulen;
2643 diff = val - nextmin;
2644 if (diff > 0) {
2645 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2646 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2647 if (diff > 1) {
2648 t = uv_to_utf8(tmpbuf, val - 1);
2649 sv_catpvn(transv, "\377", 1);
dfe13c55 2650 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2651 }
2652 }
2653 if (*s == 0xff)
dcad2880 2654 val = utf8_to_uv(s+1, cur - 1, &ulen, 0);
a0ed51b3
LW		 2655 if (val >= nextmin)
2656 nextmin = val + 1;
2657 }
2658 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2659 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2660 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2661 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2662 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2663 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2664 tlen = SvCUR(transv);
2665 tend = t + tlen;
2666 }
2667 else if (!rlen && !del) {
2668 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2669 }
2670 if (!squash) {
12ae5dfc
JH		 2671 if (t == r ||
2672 (tlen == rlen && memEQ((char *)t, (char *)r, tlen)))
01ec43d0 2673 {
4757a243 2674 o->op_private |= OPpTRANS_IDENTICAL;
01ec43d0 2675 }
a0ed51b3
LW		 2676 }
2677
2678 while (t < tend || tfirst <= tlast) {
2679 /* see if we need more "t" chars */
2680 if (tfirst > tlast) {
dcad2880 2681 tfirst = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2682 t += ulen;
2683 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2684 t++;
dcad2880 2685 tlast = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2686 t += ulen;
2687 }
2688 else
2689 tlast = tfirst;
2690 }
2691
2692 /* now see if we need more "r" chars */
2693 if (rfirst > rlast) {
2694 if (r < rend) {
dcad2880 2695 rfirst = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2696 r += ulen;
2697 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2698 r++;
dcad2880 2699 rlast = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2700 r += ulen;
2701 }
2702 else
2703 rlast = rfirst;
2704 }
2705 else {
2706 if (!havefinal++)
2707 final = rlast;
2708 rfirst = rlast = 0xffffffff;
2709 }
2710 }
2711
2712 /* now see which range will peter our first, if either. */
2713 tdiff = tlast - tfirst;
2714 rdiff = rlast - rfirst;
2715
2716 if (tdiff <= rdiff)
2717 diff = tdiff;
2718 else
2719 diff = rdiff;
2720
2721 if (rfirst == 0xffffffff) {
2722 diff = tdiff; /* oops, pretend rdiff is infinite */
2723 if (diff > 0)
894356b3
GS		 2724 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2725 (long)tfirst, (long)tlast);
a0ed51b3 2726 else
894356b3 2727 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2728 }
2729 else {
2730 if (diff > 0)
894356b3
GS		 2731 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2732 (long)tfirst, (long)(tfirst + diff),
2733 (long)rfirst);
a0ed51b3 2734 else
894356b3
GS		 2735 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2736 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2737
2738 if (rfirst + diff > max)
2739 max = rfirst + diff;
2740 rfirst += diff + 1;
2741 if (!grows) {
2742 if (rfirst <= 0x80)
2743 ;
2744 else if (rfirst <= 0x800)
2745 grows |= (tfirst < 0x80);
2746 else if (rfirst <= 0x10000)
2747 grows |= (tfirst < 0x800);
2748 else if (rfirst <= 0x200000)
2749 grows |= (tfirst < 0x10000);
2750 else if (rfirst <= 0x4000000)
2751 grows |= (tfirst < 0x200000);
2752 else if (rfirst <= 0x80000000)
2753 grows |= (tfirst < 0x4000000);
2754 }
2755 }
2756 tfirst += diff + 1;
2757 }
2758
2759 none = ++max;
2760 if (del)
2761 del = ++max;
2762
2763 if (max > 0xffff)
2764 bits = 32;
2765 else if (max > 0xff)
2766 bits = 16;
2767 else
2768 bits = 8;
2769
2770 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2771 SvREFCNT_dec(listsv);
2772 if (transv)
2773 SvREFCNT_dec(transv);
2774
2775 if (!del && havefinal)
b448e4fe
JH		 2776 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2777 newSVuv((UV)final), 0);
a0ed51b3
LW		 2778
2779 if (grows && to_utf)
2780 o->op_private |= OPpTRANS_GROWS;
2781
2782 op_free(expr);
2783 op_free(repl);
2784 return o;
2785 }
2786
2787 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2788 if (complement) {
2789 Zero(tbl, 256, short);
2790 for (i = 0; i < tlen; i++)
ec49126f 2791 tbl[t[i]] = -1;
79072805
LW		 2792 for (i = 0, j = 0; i < 256; i++) {
2793 if (!tbl[i]) {
2794 if (j >= rlen) {
a0ed51b3 2795 if (del)
79072805
LW		 2796 tbl[i] = -2;
2797 else if (rlen)
ec49126f 2798 tbl[i] = r[j-1];
79072805
LW		 2799 else
2800 tbl[i] = i;
2801 }
2802 else
ec49126f 2803 tbl[i] = r[j++];
79072805
LW		 2804 }
2805 }
2806 }
2807 else {
a0ed51b3 2808 if (!rlen && !del) {
79072805 2809 r = t; rlen = tlen;
5d06d08e 2810 if (!squash)
4757a243 2811 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2812 }
2813 for (i = 0; i < 256; i++)
2814 tbl[i] = -1;
2815 for (i = 0, j = 0; i < tlen; i++,j++) {
2816 if (j >= rlen) {
a0ed51b3 2817 if (del) {
ec49126f 2818 if (tbl[t[i]] == -1)
2819 tbl[t[i]] = -2;
79072805
LW		 2820 continue;
2821 }
2822 --j;
2823 }
ec49126f 2824 if (tbl[t[i]] == -1)
2825 tbl[t[i]] = r[j];
79072805
LW		 2826 }
2827 }
2828 op_free(expr);
2829 op_free(repl);
2830
11343788 2831 return o;
79072805
LW		 2832}
2833
2834OP *
864dbfa3 2835Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805
LW		 2836{
2837 PMOP *pmop;
2838
b7dc083c 2839 NewOp(1101, pmop, 1, PMOP);
79072805 2840 pmop->op_type = type;
22c35a8c 2841 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2842 pmop->op_flags = flags;
c07a80fd 2843 pmop->op_private = 0 | (flags >> 8);
79072805 2844
3280af22 2845 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2846 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2847 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2848 pmop->op_pmpermflags |= PMf_LOCALE;
2849 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2850
79072805 2851 /* link into pm list */
3280af22
NIS		 2852 if (type != OP_TRANS && PL_curstash) {
2853 pmop->op_pmnext = HvPMROOT(PL_curstash);
2854 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2855 }
2856
2857 return (OP*)pmop;
2858}
2859
2860OP *
864dbfa3 2861Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805
LW		 2862{
2863 PMOP *pm;
2864 LOGOP *rcop;
ce862d02 2865 I32 repl_has_vars = 0;
79072805 2866
11343788
MB		 2867 if (o->op_type == OP_TRANS)
2868 return pmtrans(o, expr, repl);
79072805 2869
3280af22 2870 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2871 pm = (PMOP*)o;
79072805
LW		 2872
2873 if (expr->op_type == OP_CONST) {
463ee0b2 2874 STRLEN plen;
79072805 2875 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2876 char *p = SvPV(pat, plen);
11343788 2877 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2878 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2879 p = SvPV(pat, plen);
79072805
LW		 2880 pm->op_pmflags |= PMf_SKIPWHITE;
2881 }
1fd7b382 2882 if ((PL_hints & HINT_UTF8) || DO_UTF8(pat))
7e2040f0 2883 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2884 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2885 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2886 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2887 op_free(expr);
2888 }
2889 else {
393fec97
GS		 2890 if (PL_hints & HINT_UTF8)
2891 pm->op_pmdynflags |= PMdf_UTF8;
3280af22 2892 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
1c846c1f 2893 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2894 ? OP_REGCRESET
2895 : OP_REGCMAYBE),0,expr);
463ee0b2 2896
b7dc083c 2897 NewOp(1101, rcop, 1, LOGOP);
79072805 2898 rcop->op_type = OP_REGCOMP;
22c35a8c 2899 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2900 rcop->op_first = scalar(expr);
1c846c1f 2901 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2902 ? (OPf_SPECIAL | OPf_KIDS)
2903 : OPf_KIDS);
79072805 2904 rcop->op_private = 1;
11343788 2905 rcop->op_other = o;
79072805
LW		 2906
2907 /* establish postfix order */
3280af22 2908 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2909 LINKLIST(expr);
2910 rcop->op_next = expr;
2911 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2912 }
2913 else {
2914 rcop->op_next = LINKLIST(expr);
2915 expr->op_next = (OP*)rcop;
2916 }
79072805 2917
11343788 2918 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2919 }
2920
2921 if (repl) {
748a9306 2922 OP *curop;
0244c3a4 2923 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2924 curop = 0;
57843af0
GS		 2925 if (CopLINE(PL_curcop) < PL_multi_end)
2926 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2927 }
554b3eca 2928#ifdef USE_THREADS
2faa37cc 2929 else if (repl->op_type == OP_THREADSV
554b3eca 2930 && strchr("&`'123456789+",
533c011a 2931 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2932 {
2933 curop = 0;
2934 }
2935#endif /* USE_THREADS */
748a9306
LW		 2936 else if (repl->op_type == OP_CONST)
2937 curop = repl;
79072805 2938 else {
79072805
LW		 2939 OP *lastop = 0;
2940 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2941 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2942#ifdef USE_THREADS
ce862d02
IZ		 2943 if (curop->op_type == OP_THREADSV) {
2944 repl_has_vars = 1;
be949f6f 2945 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2946 break;
554b3eca
MB		 2947 }
2948#else
79072805 2949 if (curop->op_type == OP_GV) {
638eceb6 2950 GV *gv = cGVOPx_gv(curop);
ce862d02 2951 repl_has_vars = 1;
93a17b20 2952 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2953 break;
2954 }
554b3eca 2955#endif /* USE_THREADS */
79072805
LW		 2956 else if (curop->op_type == OP_RV2CV)
2957 break;
2958 else if (curop->op_type == OP_RV2SV ||
2959 curop->op_type == OP_RV2AV ||
2960 curop->op_type == OP_RV2HV ||
2961 curop->op_type == OP_RV2GV) {
2962 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2963 break;
2964 }
748a9306
LW		 2965 else if (curop->op_type == OP_PADSV ||
2966 curop->op_type == OP_PADAV ||
2967 curop->op_type == OP_PADHV ||
554b3eca 2968 curop->op_type == OP_PADANY) {
ce862d02 2969 repl_has_vars = 1;
748a9306 2970 }
1167e5da
SM		 2971 else if (curop->op_type == OP_PUSHRE)
2972 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2973 else
2974 break;
2975 }
2976 lastop = curop;
2977 }
748a9306 2978 }
ce862d02 2979 if (curop == repl
1c846c1f
NIS		 2980 && !(repl_has_vars
2981 && (!pm->op_pmregexp
ce862d02 2982 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2983 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2984 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2985 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2986 }
2987 else {
ce862d02
IZ		 2988 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2989 pm->op_pmflags |= PMf_MAYBE_CONST;
2990 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2991 }
b7dc083c 2992 NewOp(1101, rcop, 1, LOGOP);
748a9306 2993 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2994 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2995 rcop->op_first = scalar(repl);
2996 rcop->op_flags |= OPf_KIDS;
2997 rcop->op_private = 1;
11343788 2998 rcop->op_other = o;
748a9306
LW		 2999
3000 /* establish postfix order */
3001 rcop->op_next = LINKLIST(repl);
3002 repl->op_next = (OP*)rcop;
3003
3004 pm->op_pmreplroot = scalar((OP*)rcop);
3005 pm->op_pmreplstart = LINKLIST(rcop);
3006 rcop->op_next = 0;
79072805
LW		 3007 }
3008 }
3009
3010 return (OP*)pm;
3011}
3012
3013OP *
864dbfa3 3014Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3015{
3016 SVOP *svop;
b7dc083c 3017 NewOp(1101, svop, 1, SVOP);
79072805 3018 svop->op_type = type;
22c35a8c 3019 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3020 svop->op_sv = sv;
3021 svop->op_next = (OP*)svop;
3022 svop->op_flags = flags;
22c35a8c 3023 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3024 scalar((OP*)svop);
22c35a8c 3025 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3026 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3027 return CHECKOP(type, svop);
79072805
LW		 3028}
3029
3030OP *
350de78d
GS		 3031Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3032{
3033 PADOP *padop;
3034 NewOp(1101, padop, 1, PADOP);
3035 padop->op_type = type;
3036 padop->op_ppaddr = PL_ppaddr[type];
3037 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3038 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3039 PL_curpad[padop->op_padix] = sv;
7766f137 3040 SvPADTMP_on(sv);
350de78d
GS		 3041 padop->op_next = (OP*)padop;
3042 padop->op_flags = flags;
3043 if (PL_opargs[type] & OA_RETSCALAR)
3044 scalar((OP*)padop);
3045 if (PL_opargs[type] & OA_TARGET)
3046 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3047 return CHECKOP(type, padop);
3048}
3049
3050OP *
864dbfa3 3051Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3052{
350de78d 3053#ifdef USE_ITHREADS
743e66e6 3054 GvIN_PAD_on(gv);
350de78d
GS		 3055 return newPADOP(type, flags, SvREFCNT_inc(gv));
3056#else
7934575e 3057 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3058#endif
79072805
LW		 3059}
3060
3061OP *
864dbfa3 3062Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3063{
3064 PVOP *pvop;
b7dc083c 3065 NewOp(1101, pvop, 1, PVOP);
79072805 3066 pvop->op_type = type;
22c35a8c 3067 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3068 pvop->op_pv = pv;
3069 pvop->op_next = (OP*)pvop;
3070 pvop->op_flags = flags;
22c35a8c 3071 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3072 scalar((OP*)pvop);
22c35a8c 3073 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3074 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3075 return CHECKOP(type, pvop);
79072805
LW		 3076}
3077
79072805 3078void
864dbfa3 3079Perl_package(pTHX_ OP *o)
79072805 3080{
93a17b20 3081 SV *sv;
79072805 3082
3280af22
NIS		 3083 save_hptr(&PL_curstash);
3084 save_item(PL_curstname);
11343788 3085 if (o) {
463ee0b2
LW		 3086 STRLEN len;
3087 char *name;
11343788 3088 sv = cSVOPo->op_sv;
463ee0b2 3089 name = SvPV(sv, len);
3280af22
NIS		 3090 PL_curstash = gv_stashpvn(name,len,TRUE);
3091 sv_setpvn(PL_curstname, name, len);
11343788 3092 op_free(o);
93a17b20
LW		 3093 }
3094 else {
3280af22
NIS		 3095 sv_setpv(PL_curstname,"<none>");
3096 PL_curstash = Nullhv;
93a17b20 3097 }
7ad382f4 3098 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3099 PL_copline = NOLINE;
3100 PL_expect = XSTATE;
79072805
LW		 3101}
3102
85e6fe83 3103void
864dbfa3 3104Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3105{
a0d0e21e 3106 OP *pack;
a0d0e21e
LW		 3107 OP *rqop;
3108 OP *imop;
b1cb66bf 3109 OP *veop;
78ca652e 3110 GV *gv;
85e6fe83 3111
a0d0e21e 3112 if (id->op_type != OP_CONST)
cea2e8a9 3113 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3114
b1cb66bf 3115 veop = Nullop;
3116
0f79a09d 3117 if (version != Nullop) {
b1cb66bf 3118 SV *vesv = ((SVOP*)version)->op_sv;
3119
44dcb63b 3120 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3121 arg = version;
3122 }
3123 else {
3124 OP *pack;
0f79a09d 3125 SV *meth;
b1cb66bf 3126
44dcb63b 3127 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3128 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3129
3130 /* Make copy of id so we don't free it twice */
3131 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3132
3133 /* Fake up a method call to VERSION */
0f79a09d
GS		 3134 meth = newSVpvn("VERSION",7);
3135 sv_upgrade(meth, SVt_PVIV);
155aba94 3136 (void)SvIOK_on(meth);
0f79a09d 3137 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3138 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3139 append_elem(OP_LIST,
0f79a09d
GS		 3140 prepend_elem(OP_LIST, pack, list(version)),
3141 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3142 }
3143 }
aeea060c 3144
a0d0e21e 3145 /* Fake up an import/unimport */
4633a7c4
LW		 3146 if (arg && arg->op_type == OP_STUB)
3147 imop = arg; /* no import on explicit () */
44dcb63b 3148 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3149 imop = Nullop; /* use 5.0; */
3150 }
4633a7c4 3151 else {
0f79a09d
GS		 3152 SV *meth;
3153
4633a7c4
LW		 3154 /* Make copy of id so we don't free it twice */
3155 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3156
3157 /* Fake up a method call to import/unimport */
3158 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3159 sv_upgrade(meth, SVt_PVIV);
155aba94 3160 (void)SvIOK_on(meth);
0f79a09d 3161 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3162 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3163 append_elem(OP_LIST,
3164 prepend_elem(OP_LIST, pack, list(arg)),
3165 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3166 }
3167
78ca652e
GS		 3168 /* Fake up a require, handle override, if any */
3169 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3170 if (!(gv && GvIMPORTED_CV(gv)))
3171 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3172
3173 if (gv && GvIMPORTED_CV(gv)) {
3174 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3175 append_elem(OP_LIST, id,
3176 scalar(newUNOP(OP_RV2CV, 0,
3177 newGVOP(OP_GV, 0,
3178 gv))))));
3179 }
3180 else {
3181 rqop = newUNOP(OP_REQUIRE, 0, id);
3182 }
a0d0e21e
LW		 3183
3184 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3185 newATTRSUB(floor,
79cb57f6 3186 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3187 Nullop,
09bef843 3188 Nullop,
a0d0e21e 3189 append_elem(OP_LINESEQ,
b1cb66bf 3190 append_elem(OP_LINESEQ,
3191 newSTATEOP(0, Nullch, rqop),
3192 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3193 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3194
c305c6a0 3195 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3196 PL_copline = NOLINE;
3197 PL_expect = XSTATE;
85e6fe83
LW		 3198}
3199
e4783991
GS		 3200void
3201Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3202{
3203 va_list args;
3204 va_start(args, ver);
3205 vload_module(flags, name, ver, &args);
3206 va_end(args);
3207}
3208
3209#ifdef PERL_IMPLICIT_CONTEXT
3210void
3211Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3212{
3213 dTHX;
3214 va_list args;
3215 va_start(args, ver);
3216 vload_module(flags, name, ver, &args);
3217 va_end(args);
3218}
3219#endif
3220
3221void
3222Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3223{
3224 OP *modname, *veop, *imop;
3225
3226 modname = newSVOP(OP_CONST, 0, name);
3227 modname->op_private |= OPpCONST_BARE;
3228 if (ver) {
3229 veop = newSVOP(OP_CONST, 0, ver);
3230 }
3231 else
3232 veop = Nullop;
3233 if (flags & PERL_LOADMOD_NOIMPORT) {
3234 imop = sawparens(newNULLLIST());
3235 }
3236 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3237 imop = va_arg(*args, OP*);
3238 }
3239 else {
3240 SV *sv;
3241 imop = Nullop;
3242 sv = va_arg(*args, SV*);
3243 while (sv) {
3244 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3245 sv = va_arg(*args, SV*);
3246 }
3247 }
81885997
GS		 3248 {
3249 line_t ocopline = PL_copline;
3250 int oexpect = PL_expect;
3251
3252 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3253 veop, modname, imop);
3254 PL_expect = oexpect;
3255 PL_copline = ocopline;
3256 }
e4783991
GS		 3257}
3258
79072805 3259OP *
864dbfa3 3260Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3261{
3262 OP *doop;
3263 GV *gv;
3264
3265 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3266 if (!(gv && GvIMPORTED_CV(gv)))
3267 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3268
3269 if (gv && GvIMPORTED_CV(gv)) {
3270 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3271 append_elem(OP_LIST, term,
3272 scalar(newUNOP(OP_RV2CV, 0,
3273 newGVOP(OP_GV, 0,
3274 gv))))));
3275 }
3276 else {
3277 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3278 }
3279 return doop;
3280}
3281
3282OP *
864dbfa3 3283Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3284{
3285 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3286 list(force_list(subscript)),
3287 list(force_list(listval)) );
79072805
LW		 3288}
3289
76e3520e 3290STATIC I32
cea2e8a9 3291S_list_assignment(pTHX_ register OP *o)
79072805 3292{
11343788 3293 if (!o)
79072805
LW		 3294 return TRUE;
3295
11343788
MB		 3296 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3297 o = cUNOPo->op_first;
79072805 3298
11343788 3299 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3300 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3301 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3302
3303 if (t && f)
3304 return TRUE;
3305 if (t || f)
3306 yyerror("Assignment to both a list and a scalar");
3307 return FALSE;
3308 }
3309
11343788
MB		 3310 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3311 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3312 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3313 return TRUE;
3314
11343788 3315 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3316 return TRUE;
3317
11343788 3318 if (o->op_type == OP_RV2SV)
79072805
LW		 3319 return FALSE;
3320
3321 return FALSE;
3322}
3323
3324OP *
864dbfa3 3325Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3326{
11343788 3327 OP *o;
79072805 3328
a0d0e21e
LW		 3329 if (optype) {
3330 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3331 return newLOGOP(optype, 0,
3332 mod(scalar(left), optype),
3333 newUNOP(OP_SASSIGN, 0, scalar(right)));
3334 }
3335 else {
3336 return newBINOP(optype, OPf_STACKED,
3337 mod(scalar(left), optype), scalar(right));
3338 }
3339 }
3340
79072805 3341 if (list_assignment(left)) {
10c8fecd
GS		 3342 OP *curop;
3343
3280af22
NIS		 3344 PL_modcount = 0;
3345 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3346 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3347 if (PL_eval_start)
3348 PL_eval_start = 0;
748a9306 3349 else {
a0d0e21e
LW		 3350 op_free(left);
3351 op_free(right);
3352 return Nullop;
3353 }
10c8fecd
GS		 3354 curop = list(force_list(left));
3355 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3356 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3357 for (curop = ((LISTOP*)curop)->op_first;
3358 curop; curop = curop->op_sibling)
3359 {
3360 if (curop->op_type == OP_RV2HV &&
3361 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3362 o->op_private |= OPpASSIGN_HASH;
3363 break;
3364 }
3365 }
a0d0e21e 3366 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3367 OP *lastop = o;
3280af22 3368 PL_generation++;
11343788 3369 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3370 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3371 if (curop->op_type == OP_GV) {
638eceb6 3372 GV *gv = cGVOPx_gv(curop);
3280af22 3373 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3374 break;
3280af22 3375 SvCUR(gv) = PL_generation;
79072805 3376 }
748a9306
LW		 3377 else if (curop->op_type == OP_PADSV ||
3378 curop->op_type == OP_PADAV ||
3379 curop->op_type == OP_PADHV ||
3380 curop->op_type == OP_PADANY) {
3280af22 3381 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3382 SV *sv = svp[curop->op_targ];
3280af22 3383 if (SvCUR(sv) == PL_generation)
748a9306 3384 break;
3280af22 3385 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3386 }
79072805
LW		 3387 else if (curop->op_type == OP_RV2CV)
3388 break;
3389 else if (curop->op_type == OP_RV2SV ||
3390 curop->op_type == OP_RV2AV ||
3391 curop->op_type == OP_RV2HV ||
3392 curop->op_type == OP_RV2GV) {
3393 if (lastop->op_type != OP_GV) /* funny deref? */
3394 break;
3395 }
1167e5da
SM		 3396 else if (curop->op_type == OP_PUSHRE) {
3397 if (((PMOP*)curop)->op_pmreplroot) {
b3f5893f
GS		 3398#ifdef USE_ITHREADS
3399 GV *gv = (GV*)PL_curpad[(PADOFFSET)((PMOP*)curop)->op_pmreplroot];
3400#else
1167e5da 3401 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
b3f5893f 3402#endif
3280af22 3403 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3404 break;
3280af22 3405 SvCUR(gv) = PL_generation;
1167e5da
SM		 3406 }
3407 }
79072805
LW		 3408 else
3409 break;
3410 }
3411 lastop = curop;
3412 }
11343788 3413 if (curop != o)
10c8fecd 3414 o->op_private |= OPpASSIGN_COMMON;
79072805 3415 }
c07a80fd 3416 if (right && right->op_type == OP_SPLIT) {
3417 OP* tmpop;
3418 if ((tmpop = ((LISTOP*)right)->op_first) &&
3419 tmpop->op_type == OP_PUSHRE)
3420 {
3421 PMOP *pm = (PMOP*)tmpop;
3422 if (left->op_type == OP_RV2AV &&
3423 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3424 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3425 {
3426 tmpop = ((UNOP*)left)->op_first;
3427 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3428#ifdef USE_ITHREADS
3429 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3430 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3431#else
3432 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3433 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3434#endif
c07a80fd 3435 pm->op_pmflags |= PMf_ONCE;
11343788 3436 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3437 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3438 tmpop->op_sibling = Nullop; /* don't free split */
3439 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3440 op_free(o); /* blow off assign */
54310121 3441 right->op_flags &= ~OPf_WANT;
a5f75d66 3442 /* "I don't know and I don't care." */
c07a80fd 3443 return right;
3444 }
3445 }
3446 else {
3280af22 3447 if (PL_modcount < 10000 &&
c07a80fd 3448 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3449 {
3450 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3451 if (SvIVX(sv) == 0)
3280af22 3452 sv_setiv(sv, PL_modcount+1);
c07a80fd 3453 }
3454 }
3455 }
3456 }
11343788 3457 return o;
79072805
LW		 3458 }
3459 if (!right)
3460 right = newOP(OP_UNDEF, 0);
3461 if (right->op_type == OP_READLINE) {
3462 right->op_flags |= OPf_STACKED;
463ee0b2 3463 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3464 }
a0d0e21e 3465 else {
3280af22 3466 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3467 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3468 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3469 if (PL_eval_start)
3470 PL_eval_start = 0;
748a9306 3471 else {
11343788 3472 op_free(o);
a0d0e21e
LW		 3473 return Nullop;
3474 }
3475 }
11343788 3476 return o;
79072805
LW		 3477}
3478
3479OP *
864dbfa3 3480Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3481{
bbce6d69 3482 U32 seq = intro_my();
79072805
LW		 3483 register COP *cop;
3484
b7dc083c 3485 NewOp(1101, cop, 1, COP);
57843af0 3486 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3487 cop->op_type = OP_DBSTATE;
22c35a8c 3488 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3489 }
3490 else {
3491 cop->op_type = OP_NEXTSTATE;
22c35a8c 3492 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3493 }
79072805 3494 cop->op_flags = flags;
393fec97 3495 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3496#ifdef NATIVE_HINTS
3497 cop->op_private |= NATIVE_HINTS;
3498#endif
e24b16f9 3499 PL_compiling.op_private = cop->op_private;
79072805
LW		 3500 cop->op_next = (OP*)cop;
3501
463ee0b2
LW		 3502 if (label) {
3503 cop->cop_label = label;
3280af22 3504 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3505 }
bbce6d69 3506 cop->cop_seq = seq;
3280af22 3507 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3508 if (specialWARN(PL_curcop->cop_warnings))
599cee73 3509 cop->cop_warnings = PL_curcop->cop_warnings ;
1c846c1f 3510 else
599cee73 3511 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
ac27b0f5
NIS		 3512 if (specialCopIO(PL_curcop->cop_io))
3513 cop->cop_io = PL_curcop->cop_io;
3514 else
3515 cop->cop_io = newSVsv(PL_curcop->cop_io) ;
599cee73 3516
79072805 3517
3280af22 3518 if (PL_copline == NOLINE)
57843af0 3519 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3520 else {
57843af0 3521 CopLINE_set(cop, PL_copline);
3280af22 3522 PL_copline = NOLINE;
79072805 3523 }
57843af0 3524#ifdef USE_ITHREADS
f4dd75d9 3525 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */
57843af0 3526#else
f4dd75d9 3527 CopFILEGV_set(cop, CopFILEGV(PL_curcop));
57843af0 3528#endif
11faa288 3529 CopSTASH_set(cop, PL_curstash);
79072805 3530
3280af22 3531 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3532 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3533 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3534 (void)SvIOK_on(*svp);
57b2e452 3535 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3536 }
3537 }
3538
11343788 3539 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3540}
3541
bbce6d69 3542/* "Introduce" my variables to visible status. */
3543U32
864dbfa3 3544Perl_intro_my(pTHX)
bbce6d69 3545{
3546 SV **svp;
3547 SV *sv;
3548 I32 i;
3549
3280af22
NIS		 3550 if (! PL_min_intro_pending)
3551 return PL_cop_seqmax;
bbce6d69 3552
3280af22
NIS		 3553 svp = AvARRAY(PL_comppad_name);
3554 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3555 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3556 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3557 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3558 }
3559 }
3280af22
NIS		 3560 PL_min_intro_pending = 0;
3561 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3562 return PL_cop_seqmax++;
bbce6d69 3563}
3564
79072805 3565OP *
864dbfa3 3566Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3567{
883ffac3
CS		 3568 return new_logop(type, flags, &first, &other);
3569}
3570
3bd495df 3571STATIC OP *
cea2e8a9 3572S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3573{
79072805 3574 LOGOP *logop;
11343788 3575 OP *o;
883ffac3
CS		 3576 OP *first = *firstp;
3577 OP *other = *otherp;
79072805 3578
a0d0e21e
LW		 3579 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3580 return newBINOP(type, flags, scalar(first), scalar(other));
3581
8990e307 3582 scalarboolean(first);
79072805
LW		 3583 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3584 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3585 if (type == OP_AND || type == OP_OR) {
3586 if (type == OP_AND)
3587 type = OP_OR;
3588 else
3589 type = OP_AND;
11343788 3590 o = first;
883ffac3 3591 first = *firstp = cUNOPo->op_first;
11343788
MB		 3592 if (o->op_next)
3593 first->op_next = o->op_next;
3594 cUNOPo->op_first = Nullop;
3595 op_free(o);
79072805
LW		 3596 }
3597 }
3598 if (first->op_type == OP_CONST) {
4673fc70 3599 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
1c846c1f 3600 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3601 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3602 op_free(first);
883ffac3 3603 *firstp = Nullop;
79072805
LW		 3604 return other;
3605 }
3606 else {
3607 op_free(other);
883ffac3 3608 *otherp = Nullop;
79072805
LW		 3609 return first;
3610 }
3611 }
3612 else if (first->op_type == OP_WANTARRAY) {
3613 if (type == OP_AND)
3614 list(other);
3615 else
3616 scalar(other);
3617 }
e476b1b5 3618 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3619 OP *k1 = ((UNOP*)first)->op_first;
3620 OP *k2 = k1->op_sibling;
3621 OPCODE warnop = 0;
3622 switch (first->op_type)
3623 {
3624 case OP_NULL:
3625 if (k2 && k2->op_type == OP_READLINE
3626 && (k2->op_flags & OPf_STACKED)
1c846c1f 3627 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3628 {
a6006777 3629 warnop = k2->op_type;
72b16652 3630 }
a6006777 3631 break;
3632
3633 case OP_SASSIGN:
68dc0745 3634 if (k1->op_type == OP_READDIR
3635 || k1->op_type == OP_GLOB
72b16652 3636 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3637 || k1->op_type == OP_EACH)
72b16652
GS		 3638 {
3639 warnop = ((k1->op_type == OP_NULL)
3640 ? k1->op_targ : k1->op_type);
3641 }
a6006777 3642 break;
3643 }
8ebc5c01 3644 if (warnop) {
57843af0
GS		 3645 line_t oldline = CopLINE(PL_curcop);
3646 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3647 Perl_warner(aTHX_ WARN_MISC,
599cee73 3648 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3649 PL_op_desc[warnop],
68dc0745 3650 ((warnop == OP_READLINE || warnop == OP_GLOB)
3651 ? " construct" : "() operator"));
57843af0 3652 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3653 }
a6006777 3654 }
79072805
LW		 3655
3656 if (!other)
3657 return first;
3658
a0d0e21e
LW		 3659 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3660 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3661
b7dc083c 3662 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3663
3664 logop->op_type = type;
22c35a8c 3665 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3666 logop->op_first = first;
3667 logop->op_flags = flags | OPf_KIDS;
3668 logop->op_other = LINKLIST(other);
c07a80fd 3669 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3670
3671 /* establish postfix order */
3672 logop->op_next = LINKLIST(first);
3673 first->op_next = (OP*)logop;
3674 first->op_sibling = other;
3675
11343788
MB		 3676 o = newUNOP(OP_NULL, 0, (OP*)logop);
3677 other->op_next = o;
79072805 3678
11343788 3679 return o;
79072805
LW		 3680}
3681
3682OP *
864dbfa3 3683Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3684{
1a67a97c
SM		 3685 LOGOP *logop;
3686 OP *start;
11343788 3687 OP *o;
79072805 3688
b1cb66bf 3689 if (!falseop)
3690 return newLOGOP(OP_AND, 0, first, trueop);
3691 if (!trueop)
3692 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3693
8990e307 3694 scalarboolean(first);
79072805
LW		 3695 if (first->op_type == OP_CONST) {
3696 if (SvTRUE(((SVOP*)first)->op_sv)) {
3697 op_free(first);
b1cb66bf 3698 op_free(falseop);
3699 return trueop;
79072805
LW		 3700 }
3701 else {
3702 op_free(first);
b1cb66bf 3703 op_free(trueop);
3704 return falseop;
79072805
LW		 3705 }
3706 }
3707 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3708 list(trueop);
3709 scalar(falseop);
79072805 3710 }
1a67a97c
SM		 3711 NewOp(1101, logop, 1, LOGOP);
3712 logop->op_type = OP_COND_EXPR;
3713 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3714 logop->op_first = first;
3715 logop->op_flags = flags | OPf_KIDS;
3716 logop->op_private = 1 | (flags >> 8);
3717 logop->op_other = LINKLIST(trueop);
3718 logop->op_next = LINKLIST(falseop);
79072805 3719
79072805
LW		 3720
3721 /* establish postfix order */
1a67a97c
SM		 3722 start = LINKLIST(first);
3723 first->op_next = (OP*)logop;
79072805 3724
b1cb66bf 3725 first->op_sibling = trueop;
3726 trueop->op_sibling = falseop;
1a67a97c 3727 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3728
1a67a97c 3729 trueop->op_next = falseop->op_next = o;
79072805 3730
1a67a97c 3731 o->op_next = start;
11343788 3732 return o;
79072805
LW		 3733}
3734
3735OP *
864dbfa3 3736Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3737{
1a67a97c 3738 LOGOP *range;
79072805
LW		 3739 OP *flip;
3740 OP *flop;
1a67a97c 3741 OP *leftstart;
11343788 3742 OP *o;
79072805 3743
1a67a97c 3744 NewOp(1101, range, 1, LOGOP);
79072805 3745
1a67a97c
SM		 3746 range->op_type = OP_RANGE;
3747 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3748 range->op_first = left;
3749 range->op_flags = OPf_KIDS;
3750 leftstart = LINKLIST(left);
3751 range->op_other = LINKLIST(right);
3752 range->op_private = 1 | (flags >> 8);
79072805
LW		 3753
3754 left->op_sibling = right;
3755
1a67a97c
SM		 3756 range->op_next = (OP*)range;
3757 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3758 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3759 o = newUNOP(OP_NULL, 0, flop);
79072805 3760 linklist(flop);
1a67a97c 3761 range->op_next = leftstart;
79072805
LW		 3762
3763 left->op_next = flip;
3764 right->op_next = flop;
3765
1a67a97c
SM		 3766 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3767 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3768 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3769 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3770
3771 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3772 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3773
11343788 3774 flip->op_next = o;
79072805 3775 if (!flip->op_private || !flop->op_private)
11343788 3776 linklist(o); /* blow off optimizer unless constant */
79072805 3777
11343788 3778 return o;
79072805
LW		 3779}
3780
3781OP *
864dbfa3 3782Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3783{
463ee0b2 3784 OP* listop;
11343788 3785 OP* o;
463ee0b2 3786 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3787 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3788
463ee0b2
LW		 3789 if (expr) {
3790 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3791 return block; /* do {} while 0 does once */
fb73857a 3792 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3793 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3794 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3795 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3796 } else if (expr->op_flags & OPf_KIDS) {
3797 OP *k1 = ((UNOP*)expr)->op_first;
3798 OP *k2 = (k1) ? k1->op_sibling : NULL;
3799 switch (expr->op_type) {
1c846c1f 3800 case OP_NULL:
55d729e4
GS		 3801 if (k2 && k2->op_type == OP_READLINE
3802 && (k2->op_flags & OPf_STACKED)
1c846c1f 3803 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3804 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3805 break;
55d729e4
GS		 3806
3807 case OP_SASSIGN:
3808 if (k1->op_type == OP_READDIR
3809 || k1->op_type == OP_GLOB
72b16652 3810 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3811 || k1->op_type == OP_EACH)
3812 expr = newUNOP(OP_DEFINED, 0, expr);
3813 break;
3814 }
774d564b 3815 }
463ee0b2 3816 }
93a17b20 3817
8990e307 3818 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3819 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3820
883ffac3
CS		 3821 if (listop)
3822 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3823
11343788
MB		 3824 if (once && o != listop)
3825 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3826
11343788
MB		 3827 if (o == listop)
3828 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3829
11343788
MB		 3830 o->op_flags |= flags;
3831 o = scope(o);
3832 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3833 return o;
79072805
LW		 3834}
3835
3836OP *
864dbfa3 3837Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805
LW		 3838{
3839 OP *redo;
3840 OP *next = 0;
3841 OP *listop;
11343788 3842 OP *o;
79072805 3843 OP *condop;
1ba6ee2b 3844 U8 loopflags = 0;
79072805 3845
fb73857a 3846 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3847 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3848 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3849 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3850 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3851 OP *k1 = ((UNOP*)expr)->op_first;
3852 OP *k2 = (k1) ? k1->op_sibling : NULL;
3853 switch (expr->op_type) {
1c846c1f 3854 case OP_NULL:
55d729e4
GS		 3855 if (k2 && k2->op_type == OP_READLINE
3856 && (k2->op_flags & OPf_STACKED)
1c846c1f 3857 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3858 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3859 break;
55d729e4
GS		 3860
3861 case OP_SASSIGN:
3862 if (k1->op_type == OP_READDIR
3863 || k1->op_type == OP_GLOB
72b16652 3864 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3865 || k1->op_type == OP_EACH)
3866 expr = newUNOP(OP_DEFINED, 0, expr);
3867 break;
3868 }
748a9306 3869 }
79072805
LW		 3870
3871 if (!block)
3872 block = newOP(OP_NULL, 0);
87246558
GS		 3873 else if (cont) {
3874 block = scope(block);
3875 }
79072805 3876
1ba6ee2b 3877 if (cont) {
79072805 3878 next = LINKLIST(cont);
1ba6ee2b
GS		 3879 loopflags |= OPpLOOP_CONTINUE;
3880 }
fb73857a 3881 if (expr) {
85538317
GS		 3882 OP *unstack = newOP(OP_UNSTACK, 0);
3883 if (!next)
3884 next = unstack;
3885 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3886 if ((line_t)whileline != NOLINE) {
3280af22 3887 PL_copline = whileline;
fb73857a 3888 cont = append_elem(OP_LINESEQ, cont,
3889 newSTATEOP(0, Nullch, Nullop));
3890 }
3891 }
79072805 3892
463ee0b2 3893 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3894 redo = LINKLIST(listop);
3895
3896 if (expr) {
3280af22 3897 PL_copline = whileline;
883ffac3
CS		 3898 scalar(listop);
3899 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3900 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3901 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3902 op_free((OP*)loop);
883ffac3 3903 return Nullop; /* listop already freed by new_logop */
463ee0b2 3904 }
883ffac3
CS		 3905 if (listop)
3906 ((LISTOP*)listop)->op_last->op_next = condop =
3907 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3908 }
3909 else
11343788 3910 o = listop;
79072805
LW		 3911
3912 if (!loop) {
b7dc083c 3913 NewOp(1101,loop,1,LOOP);
79072805 3914 loop->op_type = OP_ENTERLOOP;
22c35a8c 3915 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3916 loop->op_private = 0;
3917 loop->op_next = (OP*)loop;
3918 }
3919
11343788 3920 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3921
3922 loop->op_redoop = redo;
11343788 3923 loop->op_lastop = o;
1ba6ee2b 3924 o->op_private |= loopflags;
79072805
LW		 3925
3926 if (next)
3927 loop->op_nextop = next;
3928 else
11343788 3929 loop->op_nextop = o;
79072805 3930
11343788
MB		 3931 o->op_flags |= flags;
3932 o->op_private |= (flags >> 8);
3933 return o;
79072805
LW		 3934}
3935
3936OP *
864dbfa3 3937Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3938{
3939 LOOP *loop;
fb73857a 3940 OP *wop;
85e6fe83 3941 int padoff = 0;
4633a7c4 3942 I32 iterflags = 0;
79072805 3943
79072805 3944 if (sv) {
85e6fe83 3945 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3946 sv->op_type = OP_RV2GV;
22c35a8c 3947 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3948 }
85e6fe83
LW		 3949 else if (sv->op_type == OP_PADSV) { /* private variable */
3950 padoff = sv->op_targ;
743e66e6 3951 sv->op_targ = 0;
85e6fe83
LW		 3952 op_free(sv);
3953 sv = Nullop;
3954 }
54b9620d
MB		 3955 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3956 padoff = sv->op_targ;
743e66e6 3957 sv->op_targ = 0;
54b9620d
MB		 3958 iterflags |= OPf_SPECIAL;
3959 op_free(sv);
3960 sv = Nullop;
3961 }
79072805 3962 else
cea2e8a9 3963 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3964 }
3965 else {
54b9620d
MB		 3966#ifdef USE_THREADS
3967 padoff = find_threadsv("_");
3968 iterflags |= OPf_SPECIAL;
3969#else
3280af22 3970 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3971#endif
79072805 3972 }
5f05dabc 3973 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3974 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3975 iterflags |= OPf_STACKED;
3976 }
89ea2908
GA		 3977 else if (expr->op_type == OP_NULL &&
3978 (expr->op_flags & OPf_KIDS) &&
3979 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3980 {
3981 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3982 * set the STACKED flag to indicate that these values are to be
3983 * treated as min/max values by 'pp_iterinit'.
3984 */
3985 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3986 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3987 OP* left = range->op_first;
3988 OP* right = left->op_sibling;
5152d7c7 3989 LISTOP* listop;
89ea2908
GA		 3990
3991 range->op_flags &= ~OPf_KIDS;
3992 range->op_first = Nullop;
3993
5152d7c7 3994 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3995 listop->op_first->op_next = range->op_next;
3996 left->op_next = range->op_other;
5152d7c7
GS		 3997 right->op_next = (OP*)listop;
3998 listop->op_next = listop->op_first;
89ea2908
GA		 3999
4000 op_free(expr);
5152d7c7 4001 expr = (OP*)(listop);
89ea2908
GA		 4002 null(expr);
4003 iterflags |= OPf_STACKED;
4004 }
4005 else {
4006 expr = mod(force_list(expr), OP_GREPSTART);
4007 }
4008
4009
4633a7c4 4010 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 4011 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 4012 assert(!loop->op_next);
b7dc083c 4013#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 4014 {
4015 LOOP *tmp;
4016 NewOp(1234,tmp,1,LOOP);
4017 Copy(loop,tmp,1,LOOP);
4018 loop = tmp;
4019 }
b7dc083c 4020#else
85e6fe83 4021 Renew(loop, 1, LOOP);
1c846c1f 4022#endif
85e6fe83 4023 loop->op_targ = padoff;
fb73857a 4024 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4025 PL_copline = forline;
fb73857a 4026 return newSTATEOP(0, label, wop);
79072805
LW		 4027}
4028
8990e307 4029OP*
864dbfa3 4030Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4031{
11343788 4032 OP *o;
2d8e6c8d
GS		 4033 STRLEN n_a;
4034
8990e307 4035 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4036 /* "last()" means "last" */
4037 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4038 o = newOP(type, OPf_SPECIAL);
4039 else {
4040 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4041 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4042 : ""));
4043 }
8990e307
LW		 4044 op_free(label);
4045 }
4046 else {
a0d0e21e
LW		 4047 if (label->op_type == OP_ENTERSUB)
4048 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4049 o = newUNOP(type, OPf_STACKED, label);
8990e307 4050 }
3280af22 4051 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4052 return o;
8990e307
LW		 4053}
4054
79072805 4055void
864dbfa3 4056Perl_cv_undef(pTHX_ CV *cv)
79072805 4057{
11343788 4058#ifdef USE_THREADS
e858de61
MB		 4059 if (CvMUTEXP(cv)) {
4060 MUTEX_DESTROY(CvMUTEXP(cv));
4061 Safefree(CvMUTEXP(cv));
4062 CvMUTEXP(cv) = 0;
4063 }
11343788
MB		 4064#endif /* USE_THREADS */
4065
a0d0e21e 4066 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4067#ifdef USE_THREADS
4068 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4069 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4070#else
a0d0e21e 4071 if (CvDEPTH(cv))
cea2e8a9 4072 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4073#endif /* USE_THREADS */
8990e307 4074 ENTER;
a0d0e21e 4075
7766f137 4076 SAVEVPTR(PL_curpad);
3280af22 4077 PL_curpad = 0;
a0d0e21e 4078
a5f75d66 4079 if (!CvCLONED(cv))
748a9306 4080 op_free(CvROOT(cv));
79072805 4081 CvROOT(cv) = Nullop;
8990e307 4082 LEAVE;
79072805 4083 }
1d5db326 4084 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4085 CvFLAGS(cv) = 0;
8e07c86e
AD		 4086 SvREFCNT_dec(CvGV(cv));
4087 CvGV(cv) = Nullgv;
4088 SvREFCNT_dec(CvOUTSIDE(cv));
4089 CvOUTSIDE(cv) = Nullcv;
beab0874
JT		 4090 if (CvCONST(cv)) {
4091 SvREFCNT_dec((SV*)CvXSUBANY(cv).any_ptr);
4092 CvCONST_off(cv);
4093 }
8e07c86e 4094 if (CvPADLIST(cv)) {
8ebc5c01 4095 /* may be during global destruction */
4096 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4097 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4098 while (i >= 0) {
4099 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4100 SV* sv = svp ? *svp : Nullsv;
4101 if (!sv)
4102 continue;
3280af22
NIS		 4103 if (sv == (SV*)PL_comppad_name)
4104 PL_comppad_name = Nullav;
4105 else if (sv == (SV*)PL_comppad) {
4106 PL_comppad = Nullav;
4107 PL_curpad = Null(SV**);
46fc3d4c 4108 }
4109 SvREFCNT_dec(sv);
8ebc5c01 4110 }
4111 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4112 }
8e07c86e
AD		 4113 CvPADLIST(cv) = Nullav;
4114 }
79072805
LW		 4115}
4116
76e3520e 4117STATIC void
743e66e6 4118S_cv_dump(pTHX_ CV *cv)
5f05dabc 4119{
62fde642 4120#ifdef DEBUGGING
5f05dabc 4121 CV *outside = CvOUTSIDE(cv);
4122 AV* padlist = CvPADLIST(cv);
4fdae800 4123 AV* pad_name;
4124 AV* pad;
4125 SV** pname;
4126 SV** ppad;
5f05dabc 4127 I32 ix;
4128
b900a521
JH		 4129 PerlIO_printf(Perl_debug_log,
4130 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4131 PTR2UV(cv),
ab50184a 4132 (CvANON(cv) ? "ANON"
6b88bc9c 4133 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4134 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4135 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4136 PTR2UV(outside),
ab50184a
CS		 4137 (!outside ? "null"
4138 : CvANON(outside) ? "ANON"
6b88bc9c 4139 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4140 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4141 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4142
4fdae800 4143 if (!padlist)
4144 return;
4145
4146 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4147 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4148 pname = AvARRAY(pad_name);
4149 ppad = AvARRAY(pad);
4150
93965878 4151 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4152 if (SvPOK(pname[ix]))
b900a521
JH		 4153 PerlIO_printf(Perl_debug_log,
4154 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4155 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4156 SvFAKE(pname[ix]) ? "FAKE " : "",
4157 SvPVX(pname[ix]),
b900a521
JH		 4158 (IV)I_32(SvNVX(pname[ix])),
4159 SvIVX(pname[ix]));
5f05dabc 4160 }
743e66e6 4161#endif /* DEBUGGING */
62fde642 4162}
5f05dabc 4163
76e3520e 4164STATIC CV *
cea2e8a9 4165S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306
LW		 4166{
4167 AV* av;
4168 I32 ix;
4169 AV* protopadlist = CvPADLIST(proto);
4170 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4171 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4172 SV** pname = AvARRAY(protopad_name);
4173 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4174 I32 fname = AvFILLp(protopad_name);
4175 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4176 AV* comppadlist;
4177 CV* cv;
4178
07055b4c
CS		 4179 assert(!CvUNIQUE(proto));
4180
748a9306 4181 ENTER;
354992b1 4182 SAVECOMPPAD();
3280af22
NIS		 4183 SAVESPTR(PL_comppad_name);
4184 SAVESPTR(PL_compcv);
748a9306 4185
3280af22 4186 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4187 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4188 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4189 CvCLONED_on(cv);
748a9306 4190
11343788 4191#ifdef USE_THREADS
12ca11f6 4192 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4193 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4194 CvOWNER(cv) = 0;
4195#endif /* USE_THREADS */
57843af0 4196 CvFILE(cv) = CvFILE(proto);
44a8e56a 4197 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4198 CvSTASH(cv) = CvSTASH(proto);
4199 CvROOT(cv) = CvROOT(proto);
4200 CvSTART(cv) = CvSTART(proto);
5f05dabc 4201 if (outside)
4202 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4203
68dc0745 4204 if (SvPOK(proto))
4205 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4206
3280af22 4207 PL_comppad_name = newAV();
46fc3d4c 4208 for (ix = fname; ix >= 0; ix--)
3280af22 4209 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4210
3280af22 4211 PL_comppad = newAV();
748a9306
LW		 4212
4213 comppadlist = newAV();
4214 AvREAL_off(comppadlist);
3280af22
NIS		 4215 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4216 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4217 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4218 av_fill(PL_comppad, AvFILLp(protopad));
4219 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4220
4221 av = newAV(); /* will be @_ */
4222 av_extend(av, 0);
3280af22 4223 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4224 AvFLAGS(av) = AVf_REIFY;
4225
9607fc9c 4226 for (ix = fpad; ix > 0; ix--) {
4227 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4228 if (namesv && namesv != &PL_sv_undef) {
aa689395 4229 char *name = SvPVX(namesv); /* XXX */
4230 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4231 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4232 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4233 if (!off)
3280af22 4234 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4235 else if (off != ix)
cea2e8a9 4236 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4237 }
4238 else { /* our own lexical */
aa689395 4239 SV* sv;
5f05dabc 4240 if (*name == '&') {
4241 /* anon code -- we'll come back for it */
4242 sv = SvREFCNT_inc(ppad[ix]);
4243 }
4244 else if (*name == '@')
4245 sv = (SV*)newAV();
748a9306 4246 else if (*name == '%')
5f05dabc 4247 sv = (SV*)newHV();
748a9306 4248 else
5f05dabc 4249 sv = NEWSV(0,0);
4250 if (!SvPADBUSY(sv))
4251 SvPADMY_on(sv);
3280af22 4252 PL_curpad[ix] = sv;
748a9306
LW		 4253 }
4254 }
7766f137 4255 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4256 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4257 }
748a9306 4258 else {
aa689395 4259 SV* sv = NEWSV(0,0);
748a9306 4260 SvPADTMP_on(sv);
3280af22 4261 PL_curpad[ix] = sv;
748a9306
LW		 4262 }
4263 }
4264
5f05dabc 4265 /* Now that vars are all in place, clone nested closures. */
4266
9607fc9c 4267 for (ix = fpad; ix > 0; ix--) {
4268 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4269 if (namesv
3280af22 4270 && namesv != &PL_sv_undef
aa689395 4271 && !(SvFLAGS(namesv) & SVf_FAKE)
4272 && *SvPVX(namesv) == '&'
5f05dabc 4273 && CvCLONE(ppad[ix]))
4274 {
4275 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4276 SvREFCNT_dec(ppad[ix]);
4277 CvCLONE_on(kid);
4278 SvPADMY_on(kid);
3280af22 4279 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4280 }
4281 }
4282
5f05dabc 4283#ifdef DEBUG_CLOSURES
ab50184a
CS		 4284 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4285 cv_dump(outside);
4286 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4287 cv_dump(proto);
ab50184a 4288 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4289 cv_dump(cv);
4290#endif
4291
748a9306 4292 LEAVE;
beab0874
JT		 4293
4294 if (CvCONST(cv)) {
4295 SV* const_sv = op_const_sv(CvSTART(cv), cv);
4296 assert(const_sv);
4297 /* constant sub () { $x } closing over $x - see lib/constant.pm */
4298 SvREFCNT_dec(cv);
4299 cv = newCONSTSUB(CvSTASH(proto), 0, const_sv);
4300 }
4301
748a9306
LW		 4302 return cv;
4303}
4304
4305CV *
864dbfa3 4306Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4307{
b099ddc0 4308 CV *cv;
1feb2720 4309 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4310 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4311 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4312 return cv;
5f05dabc 4313}
4314
3fe9a6f1 4315void
864dbfa3 4316Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4317{
e476b1b5 4318 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4319 SV* msg = sv_newmortal();
3fe9a6f1 4320 SV* name = Nullsv;
4321
4322 if (gv)
46fc3d4c 4323 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4324 sv_setpv(msg, "Prototype mismatch:");
4325 if (name)
894356b3 4326 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4327 if (SvPOK(cv))
cea2e8a9 4328 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4329 sv_catpv(msg, " vs ");
4330 if (p)
cea2e8a9 4331 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4332 else
4333 sv_catpv(msg, "none");
e476b1b5 4334 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4335 }
4336}
4337
beab0874
JT		 4338static void const_sv_xsub(pTHXo_ CV* cv);
4339
4340/*
4341=for apidoc cv_const_sv
4342
4343If C<cv> is a constant sub eligible for inlining. returns the constant
4344value returned by the sub. Otherwise, returns NULL.
4345
4346Constant subs can be created with C<newCONSTSUB> or as described in
4347L<perlsub/"Constant Functions">.
4348
4349=cut
4350*/
760ac839 4351SV *
864dbfa3 4352Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4353{
beab0874 4354 if (!cv || !CvCONST(cv))
54310121 4355 return Nullsv;
beab0874 4356 return (SV*)CvXSUBANY(cv).any_ptr;
fe5e78ed 4357}
760ac839 4358
fe5e78ed 4359SV *
864dbfa3 4360Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4361{
4362 SV *sv = Nullsv;
4363
0f79a09d 4364 if (!o)
fe5e78ed 4365 return Nullsv;
1c846c1f
NIS		 4366
4367 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4368 o = cLISTOPo->op_first->op_sibling;
4369
4370 for (; o; o = o->op_next) {
54310121 4371 OPCODE type = o->op_type;
fe5e78ed 4372
1c846c1f 4373 if (sv && o->op_next == o)
fe5e78ed 4374 return sv;
e576b457
JT		 4375 if (o->op_next != o) {
4376 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4377 continue;
4378 if (type == OP_DBSTATE)
4379 continue;
4380 }
54310121 4381 if (type == OP_LEAVESUB || type == OP_RETURN)
4382 break;
4383 if (sv)
4384 return Nullsv;
7766f137 4385 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4386 sv = cSVOPo->op_sv;
7766f137 4387 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4388 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4389 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
beab0874
JT		 4390 if (!sv)
4391 return Nullsv;
4392 if (CvCONST(cv)) {
4393 /* We get here only from cv_clone2() while creating a closure.
4394 Copy the const value here instead of in cv_clone2 so that
4395 SvREADONLY_on doesn't lead to problems when leaving
4396 scope.
4397 */
4398 sv = newSVsv(sv);
4399 }
4400 if (!SvREADONLY(sv) && SvREFCNT(sv) > 1)
54310121 4401 return Nullsv;
760ac839 4402 }
54310121 4403 else
4404 return Nullsv;
760ac839 4405 }
5aabfad6 4406 if (sv)
4407 SvREADONLY_on(sv);
760ac839
LW		 4408 return sv;
4409}
4410
09bef843
SB		 4411void
4412Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4413{
4414 if (o)
4415 SAVEFREEOP(o);
4416 if (proto)
4417 SAVEFREEOP(proto);
4418 if (attrs)
4419 SAVEFREEOP(attrs);
4420 if (block)
4421 SAVEFREEOP(block);
4422 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4423}
4424
748a9306 4425CV *
864dbfa3 4426Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4427{
09bef843
SB		 4428 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4429}
4430
4431CV *
4432Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4433{
2d8e6c8d 4434 STRLEN n_a;
83ee9e09
GS		 4435 char *name;
4436 char *aname;
4437 GV *gv;
2d8e6c8d 4438 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4439 register CV *cv=0;
a0d0e21e 4440 I32 ix;
beab0874 4441 SV *const_sv;
79072805 4442
83ee9e09
GS		 4443 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4444 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4445 SV *sv = sv_newmortal();
4446 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4447 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4448 aname = SvPVX(sv);
4449 }
4450 else
4451 aname = Nullch;
4452 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4453 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4454 SVt_PVCV);
4455
11343788 4456 if (o)
5dc0d613 4457 SAVEFREEOP(o);
3fe9a6f1 4458 if (proto)
4459 SAVEFREEOP(proto);
09bef843
SB		 4460 if (attrs)
4461 SAVEFREEOP(attrs);
3fe9a6f1 4462
09bef843 4463 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4464 maximum a prototype before. */
4465 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4466 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4467 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4468 {
e476b1b5 4469 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4470 }
55d729e4
GS		 4471 cv_ckproto((CV*)gv, NULL, ps);
4472 }
4473 if (ps)
4474 sv_setpv((SV*)gv, ps);
4475 else
4476 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4477 SvREFCNT_dec(PL_compcv);
4478 cv = PL_compcv = NULL;
4479 PL_sub_generation++;
beab0874 4480 goto done;
55d729e4
GS		 4481 }
4482
beab0874
JT		 4483 cv = (!name || GvCVGEN(gv)) ? Nullcv : GvCV(gv);
4484
4485 if (!block || !ps || *ps || attrs)
4486 const_sv = Nullsv;
4487 else
4488 const_sv = op_const_sv(block, Nullcv);
4489
4490 if (cv) {
60ed1d8c
GS		 4491 bool exists = CvROOT(cv) || CvXSUB(cv);
4492 /* if the subroutine doesn't exist and wasn't pre-declared
4493 * with a prototype, assume it will be AUTOLOADed,
4494 * skipping the prototype check
4495 */
4496 if (exists || SvPOK(cv))
01ec43d0 4497 cv_ckproto(cv, gv, ps);
68dc0745 4498 /* already defined (or promised)? */
60ed1d8c 4499 if (exists || GvASSUMECV(gv)) {
09bef843 4500 if (!block && !attrs) {
aa689395 4501 /* just a "sub foo;" when &foo is already defined */
3280af22 4502 SAVEFREESV(PL_compcv);
aa689395 4503 goto done;
4504 }
7bac28a0 4505 /* ahem, death to those who redefine active sort subs */
3280af22 4506 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4507 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
beab0874
JT		 4508 if (block) {
4509 if (ckWARN(WARN_REDEFINE)
4510 || (CvCONST(cv)
4511 && (!const_sv || sv_cmp(cv_const_sv(cv), const_sv))))
4512 {
4513 line_t oldline = CopLINE(PL_curcop);
4514 CopLINE_set(PL_curcop, PL_copline);
4515 Perl_warner(aTHX_ WARN_REDEFINE,
4516 CvCONST(cv) ? "Constant subroutine %s redefined"
4517 : "Subroutine %s redefined", name);
4518 CopLINE_set(PL_curcop, oldline);
4519 }
4520 SvREFCNT_dec(cv);
4521 cv = Nullcv;
79072805 4522 }
79072805
LW		 4523 }
4524 }
beab0874
JT		 4525 if (const_sv) {
4526 SvREFCNT_inc(const_sv);
4527 if (cv) {
0768512c 4528 assert(!CvROOT(cv) && !CvCONST(cv));
beab0874
JT		 4529 sv_setpv((SV*)cv, ""); /* prototype is "" */
4530 CvXSUBANY(cv).any_ptr = const_sv;
4531 CvXSUB(cv) = const_sv_xsub;
4532 CvCONST_on(cv);
beab0874
JT		 4533 }
4534 else {
4535 GvCV(gv) = Nullcv;
4536 cv = newCONSTSUB(NULL, name, const_sv);
4537 }
4538 op_free(block);
4539 SvREFCNT_dec(PL_compcv);
4540 PL_compcv = NULL;
4541 PL_sub_generation++;
4542 goto done;
4543 }
09bef843
SB		 4544 if (attrs) {
4545 HV *stash;
4546 SV *rcv;
4547
4548 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4549 * before we clobber PL_compcv.
4550 */
4551 if (cv && !block) {
4552 rcv = (SV*)cv;
4553 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4554 stash = GvSTASH(CvGV(cv));
4555 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4556 stash = CvSTASH(cv);
4557 else
4558 stash = PL_curstash;
4559 }
4560 else {
4561 /* possibly about to re-define existing subr -- ignore old cv */
4562 rcv = (SV*)PL_compcv;
4563 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4564 stash = GvSTASH(gv);
4565 else
4566 stash = PL_curstash;
4567 }
4568 apply_attrs(stash, rcv, attrs);
4569 }
a0d0e21e 4570 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4571 if (!block) {
4572 /* got here with just attrs -- work done, so bug out */
4573 SAVEFREESV(PL_compcv);
4574 goto done;
4575 }
4633a7c4 4576 cv_undef(cv);
3280af22
NIS		 4577 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4578 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4579 CvOUTSIDE(PL_compcv) = 0;
4580 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4581 CvPADLIST(PL_compcv) = 0;
4582 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4583 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4584 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4585 }
4586 else {
3280af22 4587 cv = PL_compcv;
44a8e56a 4588 if (name) {
4589 GvCV(gv) = cv;
4590 GvCVGEN(gv) = 0;
3280af22 4591 PL_sub_generation++;
44a8e56a 4592 }
a0d0e21e 4593 }
44a8e56a 4594 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4595 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4596 CvSTASH(cv) = PL_curstash;
11343788
MB		 4597#ifdef USE_THREADS
4598 CvOWNER(cv) = 0;
1cfa4ec7 4599 if (!CvMUTEXP(cv)) {
f6aaf501 4600 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4601 MUTEX_INIT(CvMUTEXP(cv));
4602 }
11343788 4603#endif /* USE_THREADS */
8990e307 4604
3fe9a6f1 4605 if (ps)
4606 sv_setpv((SV*)cv, ps);
4633a7c4 4607
3280af22 4608 if (PL_error_count) {
c07a80fd 4609 op_free(block);
4610 block = Nullop;
68dc0745 4611 if (name) {
4612 char *s = strrchr(name, ':');
4613 s = s ? s+1 : name;
6d4c2119
CS		 4614 if (strEQ(s, "BEGIN")) {
4615 char *not_safe =
4616 "BEGIN not safe after errors--compilation aborted";
faef0170 4617 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4618 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4619 else {
4620 /* force display of errors found but not reported */
38a03e6e 4621 sv_catpv(ERRSV, not_safe);
cea2e8a9 4622 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4623 }
4624 }
68dc0745 4625 }
c07a80fd 4626 }
beab0874
JT		 4627 if (!block)
4628 goto done;
a0d0e21e 4629
3280af22
NIS		 4630 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4631 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4632
7766f137
GS		 4633 if (CvLVALUE(cv)) {
4634 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4635 }
4636 else {
4637 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4638 }
4639 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4640 OpREFCNT_set(CvROOT(cv), 1);
4641 CvSTART(cv) = LINKLIST(CvROOT(cv));
4642 CvROOT(cv)->op_next = 0;
4643 peep(CvSTART(cv));
4644
4645 /* now that optimizer has done its work, adjust pad values */
54310121 4646 if (CvCLONE(cv)) {
3280af22
NIS		 4647 SV **namep = AvARRAY(PL_comppad_name);
4648 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4649 SV *namesv;
4650
7766f137 4651 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4652 continue;
4653 /*
4654 * The only things that a clonable function needs in its
4655 * pad are references to outer lexicals and anonymous subs.
4656 * The rest are created anew during cloning.
4657 */
4658 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4659 namesv != &PL_sv_undef &&
54310121 4660 (SvFAKE(namesv) ||
4661 *SvPVX(namesv) == '&')))
4662 {
3280af22
NIS		 4663 SvREFCNT_dec(PL_curpad[ix]);
4664 PL_curpad[ix] = Nullsv;
54310121 4665 }
4666 }
beab0874
JT		 4667 assert(!CvCONST(cv));
4668 if (ps && !*ps && op_const_sv(block, cv))
4669 CvCONST_on(cv);
a0d0e21e 4670 }
54310121 4671 else {
4672 AV *av = newAV(); /* Will be @_ */
4673 av_extend(av, 0);
3280af22 4674 av_store(PL_comppad, 0, (SV*)av);
54310121 4675 AvFLAGS(av) = AVf_REIFY;
79072805 4676
3280af22 4677 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4678 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4679 continue;
3280af22
NIS		 4680 if (!SvPADMY(PL_curpad[ix]))
4681 SvPADTMP_on(PL_curpad[ix]);
54310121 4682 }
4683 }
79072805 4684
83ee9e09 4685 if (name || aname) {
44a8e56a 4686 char *s;
83ee9e09 4687 char *tname = (name ? name : aname);
44a8e56a 4688
3280af22 4689 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4690 SV *sv = NEWSV(0,0);
44a8e56a 4691 SV *tmpstr = sv_newmortal();
549bb64a 4692 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4693 CV *pcv;
44a8e56a 4694 HV *hv;
4695
ed094faf
GS		 4696 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4697 CopFILE(PL_curcop),
cc49e20b 4698 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4699 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4700 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4701 hv = GvHVn(db_postponed);
9607fc9c 4702 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4703 && (pcv = GvCV(db_postponed)))
4704 {
44a8e56a 4705 dSP;
924508f0 4706 PUSHMARK(SP);
44a8e56a 4707 XPUSHs(tmpstr);
4708 PUTBACK;
83ee9e09 4709 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4710 }
4711 }
79072805 4712
83ee9e09 4713 if ((s = strrchr(tname,':')))
28757baa 4714 s++;
4715 else
83ee9e09 4716 s = tname;
ed094faf 4717
7d30b5c4 4718 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4719 goto done;
4720
68dc0745 4721 if (strEQ(s, "BEGIN")) {
3280af22 4722 I32 oldscope = PL_scopestack_ix;
28757baa 4723 ENTER;
57843af0
GS		 4724 SAVECOPFILE(&PL_compiling);
4725 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4726 save_svref(&PL_rs);
4727 sv_setsv(PL_rs, PL_nrs);
28757baa 4728
3280af22
NIS		 4729 if (!PL_beginav)
4730 PL_beginav = newAV();
28757baa 4731 DEBUG_x( dump_sub(gv) );
ea2f84a3
GS		 4732 av_push(PL_beginav, (SV*)cv);
4733 GvCV(gv) = 0; /* cv has been hijacked */
3280af22 4734 call_list(oldscope, PL_beginav);
a6006777 4735
3280af22 4736 PL_curcop = &PL_compiling;
a0ed51b3 4737 PL_compiling.op_private = PL_hints;
28757baa 4738 LEAVE;
4739 }
3280af22
NIS		 4740 else if (strEQ(s, "END") && !PL_error_count) {
4741 if (!PL_endav)
4742 PL_endav = newAV();
ed094faf 4743 DEBUG_x( dump_sub(gv) );
3280af22 4744 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4745 av_store(PL_endav, 0, (SV*)cv);
4746 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4747 }
7d30b5c4
GS		 4748 else if (strEQ(s, "CHECK") && !PL_error_count) {
4749 if (!PL_checkav)
4750 PL_checkav = newAV();
ed094faf 4751 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4752 if (PL_main_start && ckWARN(WARN_VOID))
4753 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4754 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4755 av_store(PL_checkav, 0, (SV*)cv);
4756 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4757 }
3280af22
NIS		 4758 else if (strEQ(s, "INIT") && !PL_error_count) {
4759 if (!PL_initav)
4760 PL_initav = newAV();
ed094faf 4761 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4762 if (PL_main_start && ckWARN(WARN_VOID))
4763 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4764 av_push(PL_initav, (SV*)cv);
4765 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4766 }
79072805 4767 }
a6006777 4768
aa689395 4769 done:
3280af22 4770 PL_copline = NOLINE;
8990e307 4771 LEAVE_SCOPE(floor);
a0d0e21e 4772 return cv;
79072805
LW		 4773}
4774
b099ddc0 4775/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4776/*
4777=for apidoc newCONSTSUB
4778
4779Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4780eligible for inlining at compile-time.
4781
4782=cut
4783*/
4784
beab0874 4785CV *
864dbfa3 4786Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433 4787{
beab0874 4788 CV* cv;
5476c433 4789
11faa288 4790 ENTER;
11faa288 4791
f4dd75d9 4792 SAVECOPLINE(PL_curcop);
11faa288 4793 CopLINE_set(PL_curcop, PL_copline);
f4dd75d9
GS		 4794
4795 SAVEHINTS();
3280af22 4796 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4797
4798 if (stash) {
4799 SAVESPTR(PL_curstash);
4800 SAVECOPSTASH(PL_curcop);
4801 PL_curstash = stash;
4802#ifdef USE_ITHREADS
4803 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4804#else
4805 CopSTASH(PL_curcop) = stash;
4806#endif
4807 }
5476c433 4808
beab0874
JT		 4809 cv = newXS(name, const_sv_xsub, __FILE__);
4810 CvXSUBANY(cv).any_ptr = sv;
4811 CvCONST_on(cv);
4812 sv_setpv((SV*)cv, ""); /* prototype is "" */
5476c433 4813
11faa288 4814 LEAVE;
beab0874
JT		 4815
4816 return cv;
5476c433
JD		 4817}
4818
954c1994
GS		 4819/*
4820=for apidoc U||newXS
4821
4822Used by C<xsubpp> to hook up XSUBs as Perl subs.
4823
4824=cut
4825*/
4826
57d3b86d 4827CV *
864dbfa3 4828Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4829{
44a8e56a 4830 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4831 register CV *cv;
44a8e56a 4832
155aba94 4833 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4834 if (GvCVGEN(gv)) {
4835 /* just a cached method */
4836 SvREFCNT_dec(cv);
4837 cv = 0;
4838 }
4839 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4840 /* already defined (or promised) */
599cee73 4841 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4842 && HvNAME(GvSTASH(CvGV(cv)))
4843 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4844 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4845 if (PL_copline != NOLINE)
57843af0 4846 CopLINE_set(PL_curcop, PL_copline);
beab0874
JT		 4847 Perl_warner(aTHX_ WARN_REDEFINE,
4848 CvCONST(cv) ? "Constant subroutine %s redefined"
4849 : "Subroutine %s redefined"
4850 ,name);
57843af0 4851 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4852 }
4853 SvREFCNT_dec(cv);
4854 cv = 0;
79072805 4855 }
79072805 4856 }
44a8e56a 4857
4858 if (cv) /* must reuse cv if autoloaded */
4859 cv_undef(cv);
a0d0e21e
LW		 4860 else {
4861 cv = (CV*)NEWSV(1105,0);
4862 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4863 if (name) {
4864 GvCV(gv) = cv;
4865 GvCVGEN(gv) = 0;
3280af22 4866 PL_sub_generation++;
44a8e56a 4867 }
a0d0e21e 4868 }
5196be3e 4869 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4870#ifdef USE_THREADS
12ca11f6 4871 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4872 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4873 CvOWNER(cv) = 0;
4874#endif /* USE_THREADS */
b195d487 4875 (void)gv_fetchfile(filename);
57843af0
GS		 4876 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4877 an external constant string */
a0d0e21e 4878 CvXSUB(cv) = subaddr;
44a8e56a 4879
28757baa 4880 if (name) {
4881 char *s = strrchr(name,':');
4882 if (s)
4883 s++;
4884 else
4885 s = name;
ed094faf 4886
7d30b5c4 4887 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4888 goto done;
4889
28757baa 4890 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4891 if (!PL_beginav)
4892 PL_beginav = newAV();
ea2f84a3
GS		 4893 av_push(PL_beginav, (SV*)cv);
4894 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4895 }
4896 else if (strEQ(s, "END")) {
3280af22
NIS		 4897 if (!PL_endav)
4898 PL_endav = newAV();
4899 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4900 av_store(PL_endav, 0, (SV*)cv);
4901 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4902 }
7d30b5c4
GS		 4903 else if (strEQ(s, "CHECK")) {
4904 if (!PL_checkav)
4905 PL_checkav = newAV();
ddda08b7
GS		 4906 if (PL_main_start && ckWARN(WARN_VOID))
4907 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4908 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4909 av_store(PL_checkav, 0, (SV*)cv);
4910 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4911 }
7d07dbc2 4912 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4913 if (!PL_initav)
4914 PL_initav = newAV();
ddda08b7
GS		 4915 if (PL_main_start && ckWARN(WARN_VOID))
4916 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4917 av_push(PL_initav, (SV*)cv);
4918 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4919 }
28757baa 4920 }
8990e307 4921 else
a5f75d66 4922 CvANON_on(cv);
44a8e56a 4923
ed094faf 4924done:
a0d0e21e 4925 return cv;
79072805
LW		 4926}
4927
4928void
864dbfa3 4929Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805
LW		 4930{
4931 register CV *cv;
4932 char *name;
4933 GV *gv;
a0d0e21e 4934 I32 ix;
2d8e6c8d 4935 STRLEN n_a;
79072805 4936
11343788 4937 if (o)
2d8e6c8d 4938 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4939 else
4940 name = "STDOUT";
85e6fe83 4941 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4942 GvMULTI_on(gv);
155aba94 4943 if ((cv = GvFORM(gv))) {
599cee73 4944 if (ckWARN(WARN_REDEFINE)) {
57843af0 4945 line_t oldline = CopLINE(PL_curcop);
79072805 4946
57843af0 4947 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4948 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4949 CopLINE_set(PL_curcop, oldline);
79072805 4950 }
8990e307 4951 SvREFCNT_dec(cv);
79072805 4952 }
3280af22 4953 cv = PL_compcv;
79072805 4954 GvFORM(gv) = cv;
44a8e56a 4955 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4956 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4957
3280af22
NIS		 4958 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4959 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4960 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4961 }
4962
79072805 4963 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4964 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4965 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4966 CvSTART(cv) = LINKLIST(CvROOT(cv));
4967 CvROOT(cv)->op_next = 0;
4968 peep(CvSTART(cv));
11343788 4969 op_free(o);
3280af22 4970 PL_copline = NOLINE;
8990e307 4971 LEAVE_SCOPE(floor);
79072805
LW		 4972}
4973
4974OP *
864dbfa3 4975Perl_newANONLIST(pTHX_ OP *o)
79072805 4976{
93a17b20 4977 return newUNOP(OP_REFGEN, 0,
11343788 4978 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4979}
4980
4981OP *
864dbfa3 4982Perl_newANONHASH(pTHX_ OP *o)
79072805 4983{
93a17b20 4984 return newUNOP(OP_REFGEN, 0,
11343788 4985 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4986}
4987
4988OP *
864dbfa3 4989Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4990{
09bef843
SB		 4991 return newANONATTRSUB(floor, proto, Nullop, block);
4992}
4993
4994OP *
4995Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4996{
a0d0e21e 4997 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4998 newSVOP(OP_ANONCODE, 0,
4999 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 5000}
5001
5002OP *
864dbfa3 5003Perl_oopsAV(pTHX_ OP *o)
79072805 5004{
ed6116ce
LW		 5005 switch (o->op_type) {
5006 case OP_PADSV:
5007 o->op_type = OP_PADAV;
22c35a8c 5008 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 5009 return ref(o, OP_RV2AV);
ed6116ce
LW		 5010
5011 case OP_RV2SV:
79072805 5012 o->op_type = OP_RV2AV;
22c35a8c 5013 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 5014 ref(o, OP_RV2AV);
ed6116ce
LW		 5015 break;
5016
5017 default:
0453d815
PM		 5018 if (ckWARN_d(WARN_INTERNAL))
5019 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 5020 break;
5021 }
79072805
LW		 5022 return o;
5023}
5024
5025OP *
864dbfa3 5026Perl_oopsHV(pTHX_ OP *o)
79072805 5027{
ed6116ce
LW		 5028 switch (o->op_type) {
5029 case OP_PADSV:
5030 case OP_PADAV:
5031 o->op_type = OP_PADHV;
22c35a8c 5032 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 5033 return ref(o, OP_RV2HV);
ed6116ce
LW		 5034
5035 case OP_RV2SV:
5036 case OP_RV2AV:
79072805 5037 o->op_type = OP_RV2HV;
22c35a8c 5038 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 5039 ref(o, OP_RV2HV);
ed6116ce
LW		 5040 break;
5041
5042 default:
0453d815
PM		 5043 if (ckWARN_d(WARN_INTERNAL))
5044 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 5045 break;
5046 }
79072805
LW		 5047 return o;
5048}
5049
5050OP *
864dbfa3 5051Perl_newAVREF(pTHX_ OP *o)
79072805 5052{
ed6116ce
LW		 5053 if (o->op_type == OP_PADANY) {
5054 o->op_type = OP_PADAV;
22c35a8c 5055 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 5056 return o;
ed6116ce 5057 }
79072805
LW		 5058 return newUNOP(OP_RV2AV, 0, scalar(o));
5059}
5060
5061OP *
864dbfa3 5062Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 5063{
82092f1d 5064 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 5065 return newUNOP(OP_NULL, 0, o);
748a9306 5066 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 5067}
5068
5069OP *
864dbfa3 5070Perl_newHVREF(pTHX_ OP *o)
79072805 5071{
ed6116ce
LW		 5072 if (o->op_type == OP_PADANY) {
5073 o->op_type = OP_PADHV;
22c35a8c 5074 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 5075 return o;
ed6116ce 5076 }
79072805
LW		 5077 return newUNOP(OP_RV2HV, 0, scalar(o));
5078}
5079
5080OP *
864dbfa3 5081Perl_oopsCV(pTHX_ OP *o)
79072805 5082{
cea2e8a9 5083 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5084 /* STUB */
5085 return o;
5086}
5087
5088OP *
864dbfa3 5089Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5090{
c07a80fd 5091 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5092}
5093
5094OP *
864dbfa3 5095Perl_newSVREF(pTHX_ OP *o)
79072805 5096{
ed6116ce
LW		 5097 if (o->op_type == OP_PADANY) {
5098 o->op_type = OP_PADSV;
22c35a8c 5099 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5100 return o;
ed6116ce 5101 }
224a4551
MB		 5102 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5103 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5104 return o;
224a4551 5105 }
79072805
LW		 5106 return newUNOP(OP_RV2SV, 0, scalar(o));
5107}
5108
5109/* Check routines. */
5110
5111OP *
cea2e8a9 5112Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5113{
178c6305
CS		 5114 PADOFFSET ix;
5115 SV* name;
5116
5117 name = NEWSV(1106,0);
5118 sv_upgrade(name, SVt_PVNV);
5119 sv_setpvn(name, "&", 1);
5120 SvIVX(name) = -1;
5121 SvNVX(name) = 1;
5dc0d613 5122 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5123 av_store(PL_comppad_name, ix, name);
5124 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5125 SvPADMY_on(cSVOPo->op_sv);
5126 cSVOPo->op_sv = Nullsv;
5127 cSVOPo->op_targ = ix;
5128 return o;
5f05dabc 5129}
5130
5131OP *
cea2e8a9 5132Perl_ck_bitop(pTHX_ OP *o)
55497cff 5133{
3280af22 5134 o->op_private = PL_hints;
5dc0d613 5135 return o;
55497cff 5136}
5137
5138OP *
cea2e8a9 5139Perl_ck_concat(pTHX_ OP *o)
79072805 5140{
11343788
MB		 5141 if (cUNOPo->op_first->op_type == OP_CONCAT)
5142 o->op_flags |= OPf_STACKED;
5143 return o;
79072805
LW		 5144}
5145
5146OP *
cea2e8a9 5147Perl_ck_spair(pTHX_ OP *o)
79072805 5148{
11343788 5149 if (o->op_flags & OPf_KIDS) {
79072805 5150 OP* newop;
a0d0e21e 5151 OP* kid;
5dc0d613
MB		 5152 OPCODE type = o->op_type;
5153 o = modkids(ck_fun(o), type);
11343788 5154 kid = cUNOPo->op_first;
a0d0e21e
LW		 5155 newop = kUNOP->op_first->op_sibling;
5156 if (newop &&
5157 (newop->op_sibling ||
22c35a8c 5158 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5159 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5160 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5161
11343788 5162 return o;
a0d0e21e
LW		 5163 }
5164 op_free(kUNOP->op_first);
5165 kUNOP->op_first = newop;
5166 }
22c35a8c 5167 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5168 return ck_fun(o);
a0d0e21e
LW		 5169}
5170
5171OP *
cea2e8a9 5172Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5173{
11343788 5174 o = ck_fun(o);
5dc0d613 5175 o->op_private = 0;
11343788
MB		 5176 if (o->op_flags & OPf_KIDS) {
5177 OP *kid = cUNOPo->op_first;
01020589
GS		 5178 switch (kid->op_type) {
5179 case OP_ASLICE:
5180 o->op_flags |= OPf_SPECIAL;
5181 /* FALL THROUGH */
5182 case OP_HSLICE:
5dc0d613 5183 o->op_private |= OPpSLICE;
01020589
GS		 5184 break;
5185 case OP_AELEM:
5186 o->op_flags |= OPf_SPECIAL;
5187 /* FALL THROUGH */
5188 case OP_HELEM:
5189 break;
5190 default:
5191 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5192 PL_op_desc[o->op_type]);
01020589 5193 }
a0d0e21e 5194 null(kid);
79072805 5195 }
11343788 5196 return o;
79072805
LW		 5197}
5198
5199OP *
cea2e8a9 5200Perl_ck_eof(pTHX_ OP *o)
79072805 5201{
11343788 5202 I32 type = o->op_type;
79072805 5203
11343788
MB		 5204 if (o->op_flags & OPf_KIDS) {
5205 if (cLISTOPo->op_first->op_type == OP_STUB) {
5206 op_free(o);
5207 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5208 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5209 }
11343788 5210 return ck_fun(o);
79072805 5211 }
11343788 5212 return o;
79072805
LW		 5213}
5214
5215OP *
cea2e8a9 5216Perl_ck_eval(pTHX_ OP *o)
79072805 5217{
3280af22 5218 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5219 if (o->op_flags & OPf_KIDS) {
5220 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5221
93a17b20 5222 if (!kid) {
11343788
MB		 5223 o->op_flags &= ~OPf_KIDS;
5224 null(o);
79072805
LW		 5225 }
5226 else if (kid->op_type == OP_LINESEQ) {
5227 LOGOP *enter;
5228
11343788
MB		 5229 kid->op_next = o->op_next;
5230 cUNOPo->op_first = 0;
5231 op_free(o);
79072805 5232
b7dc083c 5233 NewOp(1101, enter, 1, LOGOP);
79072805 5234 enter->op_type = OP_ENTERTRY;
22c35a8c 5235 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5236 enter->op_private = 0;
5237
5238 /* establish postfix order */
5239 enter->op_next = (OP*)enter;
5240
11343788
MB		 5241 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5242 o->op_type = OP_LEAVETRY;
22c35a8c 5243 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5244 enter->op_other = o;
5245 return o;
79072805 5246 }
c7cc6f1c 5247 else
473986ff 5248 scalar((OP*)kid);
79072805
LW		 5249 }
5250 else {
11343788 5251 op_free(o);
54b9620d 5252 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5253 }
3280af22 5254 o->op_targ = (PADOFFSET)PL_hints;
11343788 5255 return o;
79072805
LW		 5256}
5257
5258OP *
d98f61e7
GS		 5259Perl_ck_exit(pTHX_ OP *o)
5260{
5261#ifdef VMS
5262 HV *table = GvHV(PL_hintgv);
5263 if (table) {
5264 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5265 if (svp && *svp && SvTRUE(*svp))
5266 o->op_private |= OPpEXIT_VMSISH;
5267 }
5268#endif
5269 return ck_fun(o);
5270}
5271
5272OP *
cea2e8a9 5273Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5274{
5275 OP *kid;
11343788
MB		 5276 if (o->op_flags & OPf_STACKED) {
5277 o = ck_fun(o);
5278 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5279 if (kid->op_type == OP_RV2GV)
5280 null(kid);
79072805 5281 }
463ee0b2 5282 else
11343788
MB		 5283 o = listkids(o);
5284 return o;
79072805
LW		 5285}
5286
5287OP *
cea2e8a9 5288Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5289{
5196be3e
MB		 5290 o = ck_fun(o);
5291 if (o->op_flags & OPf_KIDS) {
5292 OP *kid = cUNOPo->op_first;
afebc493
GS		 5293 if (kid->op_type == OP_ENTERSUB) {
5294 (void) ref(kid, o->op_type);
5295 if (kid->op_type != OP_RV2CV && !PL_error_count)
5296 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5297 PL_op_desc[o->op_type]);
5298 o->op_private |= OPpEXISTS_SUB;
5299 }
5300 else if (kid->op_type == OP_AELEM)
01020589
GS		 5301 o->op_flags |= OPf_SPECIAL;
5302 else if (kid->op_type != OP_HELEM)
5303 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5304 PL_op_desc[o->op_type]);
5f05dabc 5305 null(kid);
5306 }
5196be3e 5307 return o;
5f05dabc 5308}
5309
22c35a8c 5310#if 0
5f05dabc 5311OP *
cea2e8a9 5312Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5313{
5314 o = fold_constants(o);
5315 if (o->op_type == OP_CONST)
5316 o->op_type = OP_GV;
5317 return o;
5318}
22c35a8c 5319#endif
79072805
LW		 5320
5321OP *
cea2e8a9 5322Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5323{
11343788 5324 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5325
3280af22 5326 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5327 if (kid->op_type == OP_CONST) {
44a8e56a 5328 char *name;
5329 int iscv;
5330 GV *gv;
779c5bc9 5331 SV *kidsv = kid->op_sv;
2d8e6c8d 5332 STRLEN n_a;
44a8e56a 5333
779c5bc9
GS		 5334 /* Is it a constant from cv_const_sv()? */
5335 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5336 SV *rsv = SvRV(kidsv);
5337 int svtype = SvTYPE(rsv);
5338 char *badtype = Nullch;
5339
5340 switch (o->op_type) {
5341 case OP_RV2SV:
5342 if (svtype > SVt_PVMG)
5343 badtype = "a SCALAR";
5344 break;
5345 case OP_RV2AV:
5346 if (svtype != SVt_PVAV)
5347 badtype = "an ARRAY";
5348 break;
5349 case OP_RV2HV:
5350 if (svtype != SVt_PVHV) {
5351 if (svtype == SVt_PVAV) { /* pseudohash? */
5352 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5353 if (ksv && SvROK(*ksv)
5354 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5355 {
5356 break;
5357 }
5358 }
5359 badtype = "a HASH";
5360 }
5361 break;
5362 case OP_RV2CV:
5363 if (svtype != SVt_PVCV)
5364 badtype = "a CODE";
5365 break;
5366 }
5367 if (badtype)
cea2e8a9 5368 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5369 return o;
5370 }
2d8e6c8d 5371 name = SvPV(kidsv, n_a);
3280af22 5372 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5373 char *badthing = Nullch;
5dc0d613 5374 switch (o->op_type) {
44a8e56a 5375 case OP_RV2SV:
5376 badthing = "a SCALAR";
5377 break;
5378 case OP_RV2AV:
5379 badthing = "an ARRAY";
5380 break;
5381 case OP_RV2HV:
5382 badthing = "a HASH";
5383 break;
5384 }
5385 if (badthing)
1c846c1f 5386 Perl_croak(aTHX_
44a8e56a 5387 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5388 name, badthing);
5389 }
93233ece
CS		 5390 /*
5391 * This is a little tricky. We only want to add the symbol if we
5392 * didn't add it in the lexer. Otherwise we get duplicate strict
5393 * warnings. But if we didn't add it in the lexer, we must at
5394 * least pretend like we wanted to add it even if it existed before,
5395 * or we get possible typo warnings. OPpCONST_ENTERED says
5396 * whether the lexer already added THIS instance of this symbol.
5397 */
5196be3e 5398 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5399 do {
44a8e56a 5400 gv = gv_fetchpv(name,
748a9306 5401 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5402 iscv
5403 ? SVt_PVCV
11343788 5404 : o->op_type == OP_RV2SV
a0d0e21e 5405 ? SVt_PV
11343788 5406 : o->op_type == OP_RV2AV
a0d0e21e 5407 ? SVt_PVAV
11343788 5408 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5409 ? SVt_PVHV
5410 : SVt_PVGV);
93233ece
CS		 5411 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5412 if (gv) {
5413 kid->op_type = OP_GV;
5414 SvREFCNT_dec(kid->op_sv);
350de78d 5415#ifdef USE_ITHREADS
638eceb6 5416 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5417 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
63caf608 5418 SvREFCNT_dec(PL_curpad[kPADOP->op_padix]);
743e66e6 5419 GvIN_PAD_on(gv);
350de78d
GS		 5420 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5421#else
93233ece 5422 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5423#endif
76cd736e 5424 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5425 }
79072805 5426 }
11343788 5427 return o;
79072805
LW		 5428}
5429
5430OP *
cea2e8a9 5431Perl_ck_ftst(pTHX_ OP *o)
79072805 5432{
11343788 5433 I32 type = o->op_type;
79072805 5434
d0dca557
JD		 5435 if (o->op_flags & OPf_REF) {
5436 /* nothing */
5437 }
5438 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5439 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5440
5441 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5442 STRLEN n_a;
a0d0e21e 5443 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5444 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5445 op_free(o);
d0dca557 5446 o = newop;
79072805
LW		 5447 }
5448 }
5449 else {
11343788 5450 op_free(o);
79072805 5451 if (type == OP_FTTTY)
d0dca557 5452 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5453 SVt_PVIO));
79072805 5454 else
d0dca557 5455 o = newUNOP(type, 0, newDEFSVOP());
79072805 5456 }
d0dca557
JD		 5457#ifdef USE_LOCALE
5458 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5459 o->op_private = 0;
5460 if (PL_hints & HINT_LOCALE)
5461 o->op_private |= OPpLOCALE;
5462 }
5463#endif
11343788 5464 return o;
79072805
LW		 5465}
5466
5467OP *
cea2e8a9 5468Perl_ck_fun(pTHX_ OP *o)
79072805
LW		 5469{
5470 register OP *kid;
5471 OP **tokid;
5472 OP *sibl;
5473 I32 numargs = 0;
11343788 5474 int type = o->op_type;
22c35a8c 5475 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5476
11343788 5477 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5478 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5479 oa &= ~OA_OPTIONAL;
5480 else
11343788 5481 return no_fh_allowed(o);
79072805
LW		 5482 }
5483
11343788 5484 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5485 STRLEN n_a;
11343788
MB		 5486 tokid = &cLISTOPo->op_first;
5487 kid = cLISTOPo->op_first;
8990e307 5488 if (kid->op_type == OP_PUSHMARK ||
155aba94 5489 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5490 {
79072805
LW		 5491 tokid = &kid->op_sibling;
5492 kid = kid->op_sibling;
5493 }
22c35a8c 5494 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5495 *tokid = kid = newDEFSVOP();
79072805
LW		 5496
5497 while (oa && kid) {
5498 numargs++;
5499 sibl = kid->op_sibling;
5500 switch (oa & 7) {
5501 case OA_SCALAR:
62c18ce2
GS		 5502 /* list seen where single (scalar) arg expected? */
5503 if (numargs == 1 && !(oa >> 4)
5504 && kid->op_type == OP_LIST && type != OP_SCALAR)
5505 {
5506 return too_many_arguments(o,PL_op_desc[type]);
5507 }
79072805
LW		 5508 scalar(kid);
5509 break;
5510 case OA_LIST:
5511 if (oa < 16) {
5512 kid = 0;
5513 continue;
5514 }
5515 else
5516 list(kid);
5517 break;
5518 case OA_AVREF:
5519 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5520 (kid->op_private & OPpCONST_BARE))
5521 {
2d8e6c8d 5522 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5523 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5524 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5525 if (ckWARN(WARN_DEPRECATED))
5526 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5527 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5528 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5529 op_free(kid);
5530 kid = newop;
5531 kid->op_sibling = sibl;
5532 *tokid = kid;
5533 }
8990e307 5534 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5535 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5536 mod(kid, type);
79072805
LW		 5537 break;
5538 case OA_HVREF:
5539 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5540 (kid->op_private & OPpCONST_BARE))
5541 {
2d8e6c8d 5542 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5543 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5544 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5545 if (ckWARN(WARN_DEPRECATED))
5546 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5547 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5548 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5549 op_free(kid);
5550 kid = newop;
5551 kid->op_sibling = sibl;
5552 *tokid = kid;
5553 }
8990e307 5554 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5555 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5556 mod(kid, type);
79072805
LW		 5557 break;
5558 case OA_CVREF:
5559 {
a0d0e21e 5560 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5561 kid->op_sibling = 0;
5562 linklist(kid);
5563 newop->op_next = newop;
5564 kid = newop;
5565 kid->op_sibling = sibl;
5566 *tokid = kid;
5567 }
5568 break;
5569 case OA_FILEREF:
c340be78 5570 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5571 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5572 (kid->op_private & OPpCONST_BARE))
5573 {
79072805 5574 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5575 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5576 SVt_PVIO) );
79072805
LW		 5577 op_free(kid);
5578 kid = newop;
5579 }
1ea32a52
GS		 5580 else if (kid->op_type == OP_READLINE) {
5581 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5582 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5583 }
79072805 5584 else {
35cd451c 5585 I32 flags = OPf_SPECIAL;
a6c40364 5586 I32 priv = 0;
2c8ac474
GS		 5587 PADOFFSET targ = 0;
5588
35cd451c 5589 /* is this op a FH constructor? */
853846ea 5590 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5591 char *name = Nullch;
5592 STRLEN len;
5593
5594 flags = 0;
5595 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5596 * need to "prove" flag does not mean something
5597 * else already - NI-S 1999/05/07
2c8ac474
GS		 5598 */
5599 priv = OPpDEREF;
5600 if (kid->op_type == OP_PADSV) {
5601 SV **namep = av_fetch(PL_comppad_name,
5602 kid->op_targ, 4);
5603 if (namep && *namep)
5604 name = SvPV(*namep, len);
5605 }
5606 else if (kid->op_type == OP_RV2SV
5607 && kUNOP->op_first->op_type == OP_GV)
5608 {
5609 GV *gv = cGVOPx_gv(kUNOP->op_first);
5610 name = GvNAME(gv);
5611 len = GvNAMELEN(gv);
5612 }
afd1915d
GS		 5613 else if (kid->op_type == OP_AELEM
5614 || kid->op_type == OP_HELEM)
5615 {
5616 name = "__ANONIO__";
5617 len = 10;
5618 mod(kid,type);
5619 }
2c8ac474
GS		 5620 if (name) {
5621 SV *namesv;
5622 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5623 namesv = PL_curpad[targ];
155aba94 5624 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5625 if (*name != '$')
5626 sv_setpvn(namesv, "$", 1);
5627 sv_catpvn(namesv, name, len);
5628 }
853846ea 5629 }
79072805 5630 kid->op_sibling = 0;
35cd451c 5631 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5632 kid->op_targ = targ;
5633 kid->op_private |= priv;
79072805
LW		 5634 }
5635 kid->op_sibling = sibl;
5636 *tokid = kid;
5637 }
5638 scalar(kid);
5639 break;
5640 case OA_SCALARREF:
a0d0e21e 5641 mod(scalar(kid), type);
79072805
LW		 5642 break;
5643 }
5644 oa >>= 4;
5645 tokid = &kid->op_sibling;
5646 kid = kid->op_sibling;
5647 }
11343788 5648 o->op_private |= numargs;
79072805 5649 if (kid)
22c35a8c 5650 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5651 listkids(o);
79072805 5652 }
22c35a8c 5653 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5654 op_free(o);
54b9620d 5655 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5656 }
5657
79072805
LW		 5658 if (oa) {
5659 while (oa & OA_OPTIONAL)
5660 oa >>= 4;
5661 if (oa && oa != OA_LIST)
22c35a8c 5662 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5663 }
11343788 5664 return o;
79072805
LW		 5665}
5666
5667OP *
cea2e8a9 5668Perl_ck_glob(pTHX_ OP *o)
79072805 5669{
fb73857a 5670 GV *gv;
5671
649da076 5672 o = ck_fun(o);
1f2bfc8a 5673 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5674 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5675
5676 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5677 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5678
52bb0670 5679#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5680 /* XXX this can be tightened up and made more failsafe. */
5681 if (!gv) {
72b16652 5682 ENTER;
e4783991
GS		 5683 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5684 /* null-terminated import list */
5685 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5686 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5687 LEAVE;
5688 }
52bb0670 5689#endif /* PERL_EXTERNAL_GLOB */
72b16652 5690
b1cb66bf 5691 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5692 append_elem(OP_GLOB, o,
80252599 5693 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5694 o->op_type = OP_LIST;
22c35a8c 5695 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5696 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5697 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5698 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5699 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5700 scalar(newUNOP(OP_RV2CV, 0,
5701 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5702 o = newUNOP(OP_NULL, 0, ck_subr(o));
5703 o->op_targ = OP_GLOB; /* hint at what it used to be */
5704 return o;
b1cb66bf 5705 }
5706 gv = newGVgen("main");
a0d0e21e 5707 gv_IOadd(gv);
11343788
MB		 5708 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5709 scalarkids(o);
649da076 5710 return o;
79072805
LW		 5711}
5712
5713OP *
cea2e8a9 5714Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5715{
5716 LOGOP *gwop;
5717 OP *kid;
11343788 5718 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5719
22c35a8c 5720 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5721 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5722
11343788 5723 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5724 OP* k;
11343788
MB		 5725 o = ck_sort(o);
5726 kid = cLISTOPo->op_first->op_sibling;
5727 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5728 kid = k;
5729 }
5730 kid->op_next = (OP*)gwop;
11343788 5731 o->op_flags &= ~OPf_STACKED;
93a17b20 5732 }
11343788 5733 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5734 if (type == OP_MAPWHILE)
5735 list(kid);
5736 else
5737 scalar(kid);
11343788 5738 o = ck_fun(o);
3280af22 5739 if (PL_error_count)
11343788 5740 return o;
aeea060c 5741 kid = cLISTOPo->op_first->op_sibling;
79072805 5742 if (kid->op_type != OP_NULL)
cea2e8a9 5743 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5744 kid = kUNOP->op_first;
5745
a0d0e21e 5746 gwop->op_type = type;
22c35a8c 5747 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5748 gwop->op_first = listkids(o);
79072805
LW		 5749 gwop->op_flags |= OPf_KIDS;
5750 gwop->op_private = 1;
5751 gwop->op_other = LINKLIST(kid);
a0d0e21e 5752 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5753 kid->op_next = (OP*)gwop;
5754
11343788 5755 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5756 if (!kid || !kid->op_sibling)
22c35a8c 5757 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5758 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5759 mod(kid, OP_GREPSTART);
5760
79072805
LW		 5761 return (OP*)gwop;
5762}
5763
5764OP *
cea2e8a9 5765Perl_ck_index(pTHX_ OP *o)
79072805 5766{
11343788
MB		 5767 if (o->op_flags & OPf_KIDS) {
5768 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5769 if (kid)
5770 kid = kid->op_sibling; /* get past "big" */
79072805 5771 if (kid && kid->op_type == OP_CONST)
2779dcf1 5772 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5773 }
11343788 5774 return ck_fun(o);
79072805
LW		 5775}
5776
5777OP *
cea2e8a9 5778Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5779{
5780 /* XXX length optimization goes here */
11343788 5781 return ck_fun(o);
79072805
LW		 5782}
5783
5784OP *
cea2e8a9 5785Perl_ck_lfun(pTHX_ OP *o)
79072805 5786{
5dc0d613
MB		 5787 OPCODE type = o->op_type;
5788 return modkids(ck_fun(o), type);
79072805
LW		 5789}
5790
5791OP *
cea2e8a9 5792Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5793{
d0334bed
GS		 5794 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5795 switch (cUNOPo->op_first->op_type) {
5796 case OP_RV2AV:
a8739d98
JH		 5797 /* This is needed for
5798 if (defined %stash::)
5799 to work. Do not break Tk.
5800 */
1c846c1f 5801 break; /* Globals via GV can be undef */
d0334bed
GS		 5802 case OP_PADAV:
5803 case OP_AASSIGN: /* Is this a good idea? */
5804 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5805 "defined(@array) is deprecated");
d0334bed 5806 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5807 "\t(Maybe you should just omit the defined()?)\n");
69794302 5808 break;
d0334bed 5809 case OP_RV2HV:
a8739d98
JH		 5810 /* This is needed for
5811 if (defined %stash::)
5812 to work. Do not break Tk.
5813 */
1c846c1f 5814 break; /* Globals via GV can be undef */
d0334bed
GS		 5815 case OP_PADHV:
5816 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5817 "defined(%%hash) is deprecated");
d0334bed 5818 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5819 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5820 break;
5821 default:
5822 /* no warning */
5823 break;
5824 }
69794302
MJD		 5825 }
5826 return ck_rfun(o);
5827}
5828
5829OP *
cea2e8a9 5830Perl_ck_rfun(pTHX_ OP *o)
8990e307 5831{
5dc0d613
MB		 5832 OPCODE type = o->op_type;
5833 return refkids(ck_fun(o), type);
8990e307
LW		 5834}
5835
5836OP *
cea2e8a9 5837Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5838{
5839 register OP *kid;
aeea060c 5840
11343788 5841 kid = cLISTOPo->op_first;
79072805 5842 if (!kid) {
11343788
MB		 5843 o = force_list(o);
5844 kid = cLISTOPo->op_first;
79072805
LW		 5845 }
5846 if (kid->op_type == OP_PUSHMARK)
5847 kid = kid->op_sibling;
11343788 5848 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5849 kid = kid->op_sibling;
5850 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5851 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5852 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5853 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5854 cLISTOPo->op_first->op_sibling = kid;
5855 cLISTOPo->op_last = kid;
79072805
LW		 5856 kid = kid->op_sibling;
5857 }
5858 }
5859
5860 if (!kid)
54b9620d 5861 append_elem(o->op_type, o, newDEFSVOP());
79072805 5862
5dc0d613 5863 o = listkids(o);
bbce6d69 5864
5dc0d613 5865 o->op_private = 0;
36477c24 5866#ifdef USE_LOCALE
3280af22 5867 if (PL_hints & HINT_LOCALE)
5dc0d613 5868 o->op_private |= OPpLOCALE;
bbce6d69 5869#endif
5870
5dc0d613 5871 return o;
bbce6d69 5872}
5873
5874OP *
cea2e8a9 5875Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5876{
5dc0d613 5877 o = ck_fun(o);
bbce6d69 5878
5dc0d613 5879 o->op_private = 0;
36477c24 5880#ifdef USE_LOCALE
3280af22 5881 if (PL_hints & HINT_LOCALE)
5dc0d613 5882 o->op_private |= OPpLOCALE;
bbce6d69 5883#endif
5884
5dc0d613 5885 return o;
bbce6d69 5886}
5887
5888OP *
b162f9ea
IZ		 5889Perl_ck_sassign(pTHX_ OP *o)
5890{
5891 OP *kid = cLISTOPo->op_first;
5892 /* has a disposable target? */
5893 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5894 && !(kid->op_flags & OPf_STACKED)
5895 /* Cannot steal the second time! */
5896 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5897 {
5898 OP *kkid = kid->op_sibling;
5899
5900 /* Can just relocate the target. */
2c2d71f5
JH		 5901 if (kkid && kkid->op_type == OP_PADSV
5902 && !(kkid->op_private & OPpLVAL_INTRO))
5903 {
b162f9ea 5904 kid->op_targ = kkid->op_targ;
743e66e6 5905 kkid->op_targ = 0;
b162f9ea
IZ		 5906 /* Now we do not need PADSV and SASSIGN. */
5907 kid->op_sibling = o->op_sibling; /* NULL */
5908 cLISTOPo->op_first = NULL;
5909 op_free(o);
5910 op_free(kkid);
5911 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5912 return kid;
5913 }
5914 }
5915 return o;
5916}
5917
5918OP *
cea2e8a9 5919Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5920{
5dc0d613 5921 o->op_private = 0;
36477c24 5922#ifdef USE_LOCALE
3280af22 5923 if (PL_hints & HINT_LOCALE)
5dc0d613 5924 o->op_private |= OPpLOCALE;
bbce6d69 5925#endif
36477c24 5926
5dc0d613 5927 return o;
79072805
LW		 5928}
5929
5930OP *
cea2e8a9 5931Perl_ck_match(pTHX_ OP *o)
79072805 5932{
5dc0d613 5933 o->op_private |= OPpRUNTIME;
11343788 5934 return o;
79072805
LW		 5935}
5936
5937OP *
f5d5a27c
CS		 5938Perl_ck_method(pTHX_ OP *o)
5939{
5940 OP *kid = cUNOPo->op_first;
5941 if (kid->op_type == OP_CONST) {
5942 SV* sv = kSVOP->op_sv;
5943 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5944 OP *cmop;
1c846c1f
NIS		 5945 if (!SvREADONLY(sv) || !SvFAKE(sv)) {
5946 sv = newSVpvn_share(SvPVX(sv), SvCUR(sv), 0);
5947 }
5948 else {
5949 kSVOP->op_sv = Nullsv;
5950 }
f5d5a27c 5951 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
f5d5a27c
CS		 5952 op_free(o);
5953 return cmop;
5954 }
5955 }
5956 return o;
5957}
5958
5959OP *
cea2e8a9 5960Perl_ck_null(pTHX_ OP *o)
79072805 5961{
11343788 5962 return o;
79072805
LW		 5963}
5964
5965OP *
16fe6d59
GS		 5966Perl_ck_open(pTHX_ OP *o)
5967{
5968 HV *table = GvHV(PL_hintgv);
5969 if (table) {
5970 SV **svp;
5971 I32 mode;
5972 svp = hv_fetch(table, "open_IN", 7, FALSE);
5973 if (svp && *svp) {
5974 mode = mode_from_discipline(*svp);
5975 if (mode & O_BINARY)
5976 o->op_private |= OPpOPEN_IN_RAW;
5977 else if (mode & O_TEXT)
5978 o->op_private |= OPpOPEN_IN_CRLF;
5979 }
5980
5981 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5982 if (svp && *svp) {
5983 mode = mode_from_discipline(*svp);
5984 if (mode & O_BINARY)
5985 o->op_private |= OPpOPEN_OUT_RAW;
5986 else if (mode & O_TEXT)
5987 o->op_private |= OPpOPEN_OUT_CRLF;
5988 }
5989 }
5990 if (o->op_type == OP_BACKTICK)
5991 return o;
5992 return ck_fun(o);
5993}
5994
5995OP *
cea2e8a9 5996Perl_ck_repeat(pTHX_ OP *o)
79072805 5997{
11343788
MB		 5998 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5999 o->op_private |= OPpREPEAT_DOLIST;
6000 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 6001 }
6002 else
11343788
MB		 6003 scalar(o);
6004 return o;
79072805
LW		 6005}
6006
6007OP *
cea2e8a9 6008Perl_ck_require(pTHX_ OP *o)
8990e307 6009{
11343788
MB		 6010 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
6011 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 6012
6013 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 6014 char *s;
a0d0e21e
LW		 6015 for (s = SvPVX(kid->op_sv); *s; s++) {
6016 if (*s == ':' && s[1] == ':') {
6017 *s = '/';
1aef975c 6018 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 6019 --SvCUR(kid->op_sv);
6020 }
8990e307 6021 }
ce3b816e
GS		 6022 if (SvREADONLY(kid->op_sv)) {
6023 SvREADONLY_off(kid->op_sv);
6024 sv_catpvn(kid->op_sv, ".pm", 3);
6025 SvREADONLY_on(kid->op_sv);
6026 }
6027 else
6028 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 6029 }
6030 }
11343788 6031 return ck_fun(o);
8990e307
LW		 6032}
6033
22c35a8c 6034#if 0
8990e307 6035OP *
cea2e8a9 6036Perl_ck_retarget(pTHX_ OP *o)
79072805 6037{
cea2e8a9 6038 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 6039 /* STUB */
11343788 6040 return o;
79072805 6041}
22c35a8c 6042#endif
79072805
LW		 6043
6044OP *
cea2e8a9 6045Perl_ck_select(pTHX_ OP *o)
79072805 6046{
c07a80fd 6047 OP* kid;
11343788
MB		 6048 if (o->op_flags & OPf_KIDS) {
6049 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 6050 if (kid && kid->op_sibling) {
11343788 6051 o->op_type = OP_SSELECT;
22c35a8c 6052 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 6053 o = ck_fun(o);
6054 return fold_constants(o);
79072805
LW		 6055 }
6056 }
11343788
MB		 6057 o = ck_fun(o);
6058 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 6059 if (kid && kid->op_type == OP_RV2GV)
6060 kid->op_private &= ~HINT_STRICT_REFS;
11343788 6061 return o;
79072805
LW		 6062}
6063
6064OP *
cea2e8a9 6065Perl_ck_shift(pTHX_ OP *o)
79072805 6066{
11343788 6067 I32 type = o->op_type;
79072805 6068
11343788 6069 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 6070 OP *argop;
6071
11343788 6072 op_free(o);
6d4ff0d2 6073#ifdef USE_THREADS
533c011a 6074 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 6075 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 6076 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 6077 }
6078 else {
6079 argop = newUNOP(OP_RV2AV, 0,
6080 scalar(newGVOP(OP_GV, 0,
6081 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6082 }
6083#else
6084 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 6085 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6086 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6087#endif /* USE_THREADS */
6088 return newUNOP(type, 0, scalar(argop));
79072805 6089 }
11343788 6090 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6091}
6092
6093OP *
cea2e8a9 6094Perl_ck_sort(pTHX_ OP *o)
79072805 6095{
8e3f9bdf 6096 OP *firstkid;
5dc0d613 6097 o->op_private = 0;
36477c24 6098#ifdef USE_LOCALE
3280af22 6099 if (PL_hints & HINT_LOCALE)
5dc0d613 6100 o->op_private |= OPpLOCALE;
bbce6d69 6101#endif
6102
9ea6e965 6103 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6104 simplify_sort(o);
8e3f9bdf
GS		 6105 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6106 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6107 OP *k;
8e3f9bdf 6108 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6109
463ee0b2 6110 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6111 linklist(kid);
463ee0b2
LW		 6112 if (kid->op_type == OP_SCOPE) {
6113 k = kid->op_next;
6114 kid->op_next = 0;
79072805 6115 }
463ee0b2 6116 else if (kid->op_type == OP_LEAVE) {
11343788 6117 if (o->op_type == OP_SORT) {
748a9306
LW		 6118 null(kid); /* wipe out leave */
6119 kid->op_next = kid;
463ee0b2 6120
748a9306
LW		 6121 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6122 if (k->op_next == kid)
6123 k->op_next = 0;
71a29c3c
GS		 6124 /* don't descend into loops */
6125 else if (k->op_type == OP_ENTERLOOP
6126 || k->op_type == OP_ENTERITER)
6127 {
6128 k = cLOOPx(k)->op_lastop;
6129 }
748a9306 6130 }
463ee0b2 6131 }
748a9306
LW		 6132 else
6133 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6134 k = kLISTOP->op_first;
463ee0b2 6135 }
a0d0e21e
LW		 6136 peep(k);
6137
8e3f9bdf
GS		 6138 kid = firstkid;
6139 if (o->op_type == OP_SORT) {
6140 /* provide scalar context for comparison function/block */
6141 kid = scalar(kid);
a0d0e21e 6142 kid->op_next = kid;
8e3f9bdf 6143 }
a0d0e21e
LW		 6144 else
6145 kid->op_next = k;
11343788 6146 o->op_flags |= OPf_SPECIAL;
79072805 6147 }
c6e96bcb 6148 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6149 null(firstkid);
6150
6151 firstkid = firstkid->op_sibling;
79072805 6152 }
bbce6d69 6153
8e3f9bdf
GS		 6154 /* provide list context for arguments */
6155 if (o->op_type == OP_SORT)
6156 list(firstkid);
6157
11343788 6158 return o;
79072805 6159}
bda4119b
GS		 6160
6161STATIC void
cea2e8a9 6162S_simplify_sort(pTHX_ OP *o)
9c007264
JH		 6163{
6164 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6165 OP *k;
6166 int reversed;
350de78d 6167 GV *gv;
9c007264
JH		 6168 if (!(o->op_flags & OPf_STACKED))
6169 return;
1c846c1f
NIS		 6170 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6171 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6172 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6173 if (kid->op_type != OP_SCOPE)
6174 return;
6175 kid = kLISTOP->op_last; /* get past scope */
6176 switch(kid->op_type) {
6177 case OP_NCMP:
6178 case OP_I_NCMP:
6179 case OP_SCMP:
6180 break;
6181 default:
6182 return;
6183 }
6184 k = kid; /* remember this node*/
6185 if (kBINOP->op_first->op_type != OP_RV2SV)
6186 return;
6187 kid = kBINOP->op_first; /* get past cmp */
6188 if (kUNOP->op_first->op_type != OP_GV)
6189 return;
6190 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6191 gv = kGVOP_gv;
350de78d 6192 if (GvSTASH(gv) != PL_curstash)
9c007264 6193 return;
350de78d 6194 if (strEQ(GvNAME(gv), "a"))
9c007264 6195 reversed = 0;
0f79a09d 6196 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6197 reversed = 1;
6198 else
6199 return;
6200 kid = k; /* back to cmp */
6201 if (kBINOP->op_last->op_type != OP_RV2SV)
6202 return;
6203 kid = kBINOP->op_last; /* down to 2nd arg */
6204 if (kUNOP->op_first->op_type != OP_GV)
6205 return;
6206 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6207 gv = kGVOP_gv;
350de78d 6208 if (GvSTASH(gv) != PL_curstash
9c007264 6209 || ( reversed
350de78d
GS		 6210 ? strNE(GvNAME(gv), "a")
6211 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6212 return;
6213 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6214 if (reversed)
6215 o->op_private |= OPpSORT_REVERSE;
6216 if (k->op_type == OP_NCMP)
6217 o->op_private |= OPpSORT_NUMERIC;
6218 if (k->op_type == OP_I_NCMP)
6219 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6220 kid = cLISTOPo->op_first->op_sibling;
6221 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6222 op_free(kid); /* then delete it */
6223 cLISTOPo->op_children--;
9c007264 6224}
79072805
LW		 6225
6226OP *
cea2e8a9 6227Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6228{
6229 register OP *kid;
aeea060c 6230
11343788
MB		 6231 if (o->op_flags & OPf_STACKED)
6232 return no_fh_allowed(o);
79072805 6233
11343788 6234 kid = cLISTOPo->op_first;
8990e307 6235 if (kid->op_type != OP_NULL)
cea2e8a9 6236 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6237 kid = kid->op_sibling;
11343788
MB		 6238 op_free(cLISTOPo->op_first);
6239 cLISTOPo->op_first = kid;
85e6fe83 6240 if (!kid) {
79cb57f6 6241 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6242 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6243 }
79072805 6244
de4bf5b3 6245 if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) {
79072805 6246 OP *sibl = kid->op_sibling;
463ee0b2 6247 kid->op_sibling = 0;
79072805 6248 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6249 if (cLISTOPo->op_first == cLISTOPo->op_last)
6250 cLISTOPo->op_last = kid;
6251 cLISTOPo->op_first = kid;
79072805
LW		 6252 kid->op_sibling = sibl;
6253 }
6254
6255 kid->op_type = OP_PUSHRE;
22c35a8c 6256 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6257 scalar(kid);
6258
6259 if (!kid->op_sibling)
54b9620d 6260 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6261
6262 kid = kid->op_sibling;
6263 scalar(kid);
6264
6265 if (!kid->op_sibling)
11343788 6266 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6267
6268 kid = kid->op_sibling;
6269 scalar(kid);
6270
6271 if (kid->op_sibling)
22c35a8c 6272 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6273
11343788 6274 return o;
79072805
LW		 6275}
6276
6277OP *
1c846c1f 6278Perl_ck_join(pTHX_ OP *o)
eb6e2d6f
GS		 6279{
6280 if (ckWARN(WARN_SYNTAX)) {
6281 OP *kid = cLISTOPo->op_first->op_sibling;
6282 if (kid && kid->op_type == OP_MATCH) {
6283 char *pmstr = "STRING";
6284 if (kPMOP->op_pmregexp)
6285 pmstr = kPMOP->op_pmregexp->precomp;
6286 Perl_warner(aTHX_ WARN_SYNTAX,
6287 "/%s/ should probably be written as \"%s\"",
6288 pmstr, pmstr);
6289 }
6290 }
6291 return ck_fun(o);
6292}
6293
6294OP *
cea2e8a9 6295Perl_ck_subr(pTHX_ OP *o)
79072805 6296{
11343788
MB		 6297 OP *prev = ((cUNOPo->op_first->op_sibling)
6298 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6299 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6300 OP *cvop;
6301 char *proto = 0;
6302 CV *cv = 0;
46fc3d4c 6303 GV *namegv = 0;
4633a7c4
LW		 6304 int optional = 0;
6305 I32 arg = 0;
2d8e6c8d 6306 STRLEN n_a;
4633a7c4 6307
d3011074 6308 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6309 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6310 if (cvop->op_type == OP_RV2CV) {
6311 SVOP* tmpop;
11343788 6312 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6313 null(cvop); /* disable rv2cv */
6314 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6315 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6316 GV *gv = cGVOPx_gv(tmpop);
350de78d 6317 cv = GvCVu(gv);
76cd736e
GS		 6318 if (!cv)
6319 tmpop->op_private |= OPpEARLY_CV;
6320 else if (SvPOK(cv)) {
350de78d 6321 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6322 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6323 }
4633a7c4
LW		 6324 }
6325 }
f5d5a27c 6326 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6327 if (o2->op_type == OP_CONST)
6328 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6329 else if (o2->op_type == OP_LIST) {
6330 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6331 if (o && o->op_type == OP_CONST)
6332 o->op_private &= ~OPpCONST_STRICT;
6333 }
7a52d87a 6334 }
3280af22
NIS		 6335 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6336 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6337 o->op_private |= OPpENTERSUB_DB;
6338 while (o2 != cvop) {
4633a7c4
LW		 6339 if (proto) {
6340 switch (*proto) {
6341 case '\0':
5dc0d613 6342 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6343 case ';':
6344 optional = 1;
6345 proto++;
6346 continue;
6347 case '$':
6348 proto++;
6349 arg++;
11343788 6350 scalar(o2);
4633a7c4
LW		 6351 break;
6352 case '%':
6353 case '@':
11343788 6354 list(o2);
4633a7c4
LW		 6355 arg++;
6356 break;
6357 case '&':
6358 proto++;
6359 arg++;
11343788 6360 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6361 bad_type(arg,
6362 arg == 1 ? "block or sub {}" : "sub {}",
6363 gv_ename(namegv), o2);
4633a7c4
LW		 6364 break;
6365 case '*':
2ba6ecf4 6366 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6367 proto++;
6368 arg++;
11343788 6369 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6370 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6371 else if (o2->op_type == OP_CONST)
6372 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6373 else if (o2->op_type == OP_ENTERSUB) {
6374 /* accidental subroutine, revert to bareword */
6375 OP *gvop = ((UNOP*)o2)->op_first;
6376 if (gvop && gvop->op_type == OP_NULL) {
6377 gvop = ((UNOP*)gvop)->op_first;
6378 if (gvop) {
6379 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6380 ;
6381 if (gvop &&
6382 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6383 (gvop = ((UNOP*)gvop)->op_first) &&
6384 gvop->op_type == OP_GV)
6385 {
638eceb6 6386 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6387 OP *sibling = o2->op_sibling;
2692f720 6388 SV *n = newSVpvn("",0);
9675f7ac 6389 op_free(o2);
2692f720
GS		 6390 gv_fullname3(n, gv, "");
6391 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6392 sv_chop(n, SvPVX(n)+6);
6393 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6394 prev->op_sibling = o2;
6395 o2->op_sibling = sibling;
6396 }
6397 }
6398 }
6399 }
2ba6ecf4
GS		 6400 scalar(o2);
6401 break;
4633a7c4
LW		 6402 case '\\':
6403 proto++;
6404 arg++;
6405 switch (*proto++) {
6406 case '*':
11343788 6407 if (o2->op_type != OP_RV2GV)
5dc0d613 6408 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6409 goto wrapref;
6410 case '&':
75fc29ea
GS		 6411 if (o2->op_type != OP_ENTERSUB)
6412 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6413 goto wrapref;
6414 case '$':
386acf99
GS		 6415 if (o2->op_type != OP_RV2SV
6416 && o2->op_type != OP_PADSV
1c01eb51
GS		 6417 && o2->op_type != OP_HELEM
6418 && o2->op_type != OP_AELEM
386acf99
GS		 6419 && o2->op_type != OP_THREADSV)
6420 {
5dc0d613 6421 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6422 }
4633a7c4
LW		 6423 goto wrapref;
6424 case '@':
11343788 6425 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6426 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6427 goto wrapref;
6428 case '%':
11343788 6429 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6430 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6431 wrapref:
6432 {
11343788 6433 OP* kid = o2;
6fa846a0 6434 OP* sib = kid->op_sibling;
4633a7c4 6435 kid->op_sibling = 0;
6fa846a0
GS		 6436 o2 = newUNOP(OP_REFGEN, 0, kid);
6437 o2->op_sibling = sib;
e858de61 6438 prev->op_sibling = o2;
4633a7c4
LW		 6439 }
6440 break;
6441 default: goto oops;
6442 }
6443 break;
b1cb66bf 6444 case ' ':
6445 proto++;
6446 continue;
4633a7c4
LW		 6447 default:
6448 oops:
cea2e8a9 6449 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6450 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6451 }
6452 }
6453 else
11343788
MB		 6454 list(o2);
6455 mod(o2, OP_ENTERSUB);
6456 prev = o2;
6457 o2 = o2->op_sibling;
4633a7c4 6458 }
fb73857a 6459 if (proto && !optional &&
6460 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6461 return too_few_arguments(o, gv_ename(namegv));
11343788 6462 return o;
79072805
LW		 6463}
6464
6465OP *
cea2e8a9 6466Perl_ck_svconst(pTHX_ OP *o)
8990e307 6467{
11343788
MB		 6468 SvREADONLY_on(cSVOPo->op_sv);
6469 return o;
8990e307
LW		 6470}
6471
6472OP *
cea2e8a9 6473Perl_ck_trunc(pTHX_ OP *o)
79072805 6474{
11343788
MB		 6475 if (o->op_flags & OPf_KIDS) {
6476 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6477
a0d0e21e
LW		 6478 if (kid->op_type == OP_NULL)
6479 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6480 if (kid && kid->op_type == OP_CONST &&
6481 (kid->op_private & OPpCONST_BARE))
6482 {
11343788 6483 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6484 kid->op_private &= ~OPpCONST_STRICT;
6485 }
79072805 6486 }
11343788 6487 return ck_fun(o);
79072805
LW		 6488}
6489
35fba0d9
RG		 6490OP *
6491Perl_ck_substr(pTHX_ OP *o)
6492{
6493 o = ck_fun(o);
6494 if ((o->op_flags & OPf_KIDS) && o->op_private == 4) {
6495 OP *kid = cLISTOPo->op_first;
6496
6497 if (kid->op_type == OP_NULL)
6498 kid = kid->op_sibling;
6499 if (kid)
6500 kid->op_flags |= OPf_MOD;
6501
6502 }
6503 return o;
6504}
6505
463ee0b2
LW		 6506/* A peephole optimizer. We visit the ops in the order they're to execute. */
6507
79072805 6508void
864dbfa3 6509Perl_peep(pTHX_ register OP *o)
79072805
LW		 6510{
6511 register OP* oldop = 0;
2d8e6c8d 6512 STRLEN n_a;
cd06dffe 6513 OP *last_composite = Nullop;
2d8e6c8d 6514
a0d0e21e 6515 if (!o || o->op_seq)
79072805 6516 return;
a0d0e21e 6517 ENTER;
462e5cf6 6518 SAVEOP();
7766f137 6519 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6520 for (; o; o = o->op_next) {
6521 if (o->op_seq)
6522 break;
3280af22
NIS		 6523 if (!PL_op_seqmax)
6524 PL_op_seqmax++;
533c011a 6525 PL_op = o;
a0d0e21e 6526 switch (o->op_type) {
acb36ea4 6527 case OP_SETSTATE:
a0d0e21e
LW		 6528 case OP_NEXTSTATE:
6529 case OP_DBSTATE:
3280af22
NIS		 6530 PL_curcop = ((COP*)o); /* for warnings */
6531 o->op_seq = PL_op_seqmax++;
cd06dffe 6532 last_composite = Nullop;
a0d0e21e
LW		 6533 break;
6534
a0d0e21e 6535 case OP_CONST:
7a52d87a
GS		 6536 if (cSVOPo->op_private & OPpCONST_STRICT)
6537 no_bareword_allowed(o);
7766f137
GS		 6538#ifdef USE_ITHREADS
6539 /* Relocate sv to the pad for thread safety.
6540 * Despite being a "constant", the SV is written to,
6541 * for reference counts, sv_upgrade() etc. */
6542 if (cSVOP->op_sv) {
6543 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6544 if (SvPADTMP(cSVOPo->op_sv)) {
6545 /* If op_sv is already a PADTMP then it is being used by
9a049f1c 6546 * some pad, so make a copy. */
6a7129a1
GS		 6547 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6548 SvREADONLY_on(PL_curpad[ix]);
6549 SvREFCNT_dec(cSVOPo->op_sv);
6550 }
6551 else {
6552 SvREFCNT_dec(PL_curpad[ix]);
6553 SvPADTMP_on(cSVOPo->op_sv);
6554 PL_curpad[ix] = cSVOPo->op_sv;
9a049f1c
JT		 6555 /* XXX I don't know how this isn't readonly already. */
6556 SvREADONLY_on(PL_curpad[ix]);
6a7129a1 6557 }
7766f137
GS		 6558 cSVOPo->op_sv = Nullsv;
6559 o->op_targ = ix;
6560 }
6561#endif
07447971
GS		 6562 o->op_seq = PL_op_seqmax++;
6563 break;
6564
ed7ab888 6565 case OP_CONCAT:
b162f9ea
IZ		 6566 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6567 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6568 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6569 goto ignore_optimization;
cd06dffe 6570 else {
07447971 6571 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6572 o->op_targ = o->op_next->op_targ;
743e66e6 6573 o->op_next->op_targ = 0;
2c2d71f5 6574 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6575 }
6576 }
a0d0e21e 6577 null(o->op_next);
b162f9ea
IZ		 6578 }
6579 ignore_optimization:
3280af22 6580 o->op_seq = PL_op_seqmax++;
a0d0e21e 6581 break;
8990e307 6582 case OP_STUB:
54310121 6583 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6584 o->op_seq = PL_op_seqmax++;
54310121 6585 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6586 }
748a9306 6587 goto nothin;
79072805 6588 case OP_NULL:
acb36ea4
GS		 6589 if (o->op_targ == OP_NEXTSTATE
6590 || o->op_targ == OP_DBSTATE
6591 || o->op_targ == OP_SETSTATE)
6592 {
3280af22 6593 PL_curcop = ((COP*)o);
acb36ea4 6594 }
748a9306 6595 goto nothin;
79072805 6596 case OP_SCALAR:
93a17b20 6597 case OP_LINESEQ:
463ee0b2 6598 case OP_SCOPE:
748a9306 6599 nothin:
a0d0e21e
LW		 6600 if (oldop && o->op_next) {
6601 oldop->op_next = o->op_next;
79072805
LW		 6602 continue;
6603 }
3280af22 6604 o->op_seq = PL_op_seqmax++;
79072805
LW		 6605 break;
6606
6607 case OP_GV:
a0d0e21e 6608 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6609 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6610 null(o->op_next);
64aac5a9
GS		 6611 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6612 | OPpOUR_INTRO);
a0d0e21e
LW		 6613 o->op_next = o->op_next->op_next;
6614 o->op_type = OP_GVSV;
22c35a8c 6615 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6616 }
6617 }
a0d0e21e
LW		 6618 else if (o->op_next->op_type == OP_RV2AV) {
6619 OP* pop = o->op_next->op_next;
6620 IV i;
8990e307 6621 if (pop->op_type == OP_CONST &&
533c011a 6622 (PL_op = pop->op_next) &&
8990e307 6623 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6624 !(pop->op_next->op_private &
68dc0745 6625 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6626 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6627 <= 255 &&
8990e307
LW		 6628 i >= 0)
6629 {
350de78d 6630 GV *gv;
a0d0e21e 6631 null(o->op_next);
8990e307
LW		 6632 null(pop->op_next);
6633 null(pop);
a0d0e21e
LW		 6634 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6635 o->op_next = pop->op_next->op_next;
6636 o->op_type = OP_AELEMFAST;
22c35a8c 6637 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6638 o->op_private = (U8)i;
638eceb6 6639 gv = cGVOPo_gv;
350de78d 6640 GvAVn(gv);
8990e307 6641 }
79072805 6642 }
e476b1b5 6643 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6644 GV *gv = cGVOPo_gv;
76cd736e
GS		 6645 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6646 /* XXX could check prototype here instead of just carping */
6647 SV *sv = sv_newmortal();
6648 gv_efullname3(sv, gv, Nullch);
e476b1b5 6649 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6650 "%s() called too early to check prototype",
6651 SvPV_nolen(sv));
6652 }
6653 }
6654
3280af22 6655 o->op_seq = PL_op_seqmax++;
79072805
LW		 6656 break;
6657
a0d0e21e 6658 case OP_MAPWHILE:
79072805
LW		 6659 case OP_GREPWHILE:
6660 case OP_AND:
6661 case OP_OR:
2c2d71f5
JH		 6662 case OP_ANDASSIGN:
6663 case OP_ORASSIGN:
1a67a97c
SM		 6664 case OP_COND_EXPR:
6665 case OP_RANGE:
3280af22 6666 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6667 while (cLOGOP->op_other->op_type == OP_NULL)
6668 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6669 peep(cLOGOP->op_other);
6670 break;
6671
79072805 6672 case OP_ENTERLOOP:
3280af22 6673 o->op_seq = PL_op_seqmax++;
79072805
LW		 6674 peep(cLOOP->op_redoop);
6675 peep(cLOOP->op_nextop);
6676 peep(cLOOP->op_lastop);
6677 break;
6678
8782bef2 6679 case OP_QR:
79072805
LW		 6680 case OP_MATCH:
6681 case OP_SUBST:
3280af22 6682 o->op_seq = PL_op_seqmax++;
a0d0e21e 6683 peep(cPMOP->op_pmreplstart);
79072805
LW		 6684 break;
6685
a0d0e21e 6686 case OP_EXEC:
3280af22 6687 o->op_seq = PL_op_seqmax++;
1c846c1f 6688 if (ckWARN(WARN_SYNTAX) && o->op_next
599cee73 6689 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6690 if (o->op_next->op_sibling &&
20408e3c
GS		 6691 o->op_next->op_sibling->op_type != OP_EXIT &&
6692 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6693 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6694 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6695
57843af0 6696 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6697 Perl_warner(aTHX_ WARN_EXEC,
6698 "Statement unlikely to be reached");
6699 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6700 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6701 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6702 }
6703 }
6704 break;
aeea060c 6705
c750a3ec
MB		 6706 case OP_HELEM: {
6707 UNOP *rop;
6708 SV *lexname;
6709 GV **fields;
9615e741 6710 SV **svp, **indsvp, *sv;
c750a3ec 6711 I32 ind;
1c846c1f 6712 char *key = NULL;
c750a3ec 6713 STRLEN keylen;
aeea060c 6714
9615e741 6715 o->op_seq = PL_op_seqmax++;
1c846c1f
NIS		 6716
6717 if (((BINOP*)o)->op_last->op_type != OP_CONST)
c750a3ec 6718 break;
1c846c1f
NIS		 6719
6720 /* Make the CONST have a shared SV */
6721 svp = cSVOPx_svp(((BINOP*)o)->op_last);
3049cdab 6722 if ((!SvFAKE(sv = *svp) || !SvREADONLY(sv)) && !IS_PADCONST(sv)) {
1c846c1f
NIS		 6723 key = SvPV(sv, keylen);
6724 lexname = newSVpvn_share(key, keylen, 0);
8fed10cd
JH		 6725 if (SvUTF8(sv))
6726 SvUTF8_on(lexname);
1c846c1f
NIS		 6727 SvREFCNT_dec(sv);
6728 *svp = lexname;
6729 }
6730
6731 if ((o->op_private & (OPpLVAL_INTRO)))
6732 break;
6733
c750a3ec
MB		 6734 rop = (UNOP*)((BINOP*)o)->op_first;
6735 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6736 break;
3280af22 6737 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6738 if (!SvOBJECT(lexname))
6739 break;
5196be3e 6740 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6741 if (!fields || !GvHV(*fields))
6742 break;
c750a3ec
MB		 6743 key = SvPV(*svp, keylen);
6744 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6745 if (!indsvp) {
88e9b055 6746 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6747 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6748 }
6749 ind = SvIV(*indsvp);
6750 if (ind < 1)
cea2e8a9 6751 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6752 rop->op_type = OP_RV2AV;
22c35a8c 6753 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6754 o->op_type = OP_AELEM;
22c35a8c 6755 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6756 sv = newSViv(ind);
6757 if (SvREADONLY(*svp))
6758 SvREADONLY_on(sv);
6759 SvFLAGS(sv) |= (SvFLAGS(*svp)
6760 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6761 SvREFCNT_dec(*svp);
9615e741 6762 *svp = sv;
c750a3ec
MB		 6763 break;
6764 }
345599ca
GS		 6765
6766 case OP_HSLICE: {
6767 UNOP *rop;
6768 SV *lexname;
6769 GV **fields;
9615e741 6770 SV **svp, **indsvp, *sv;
345599ca
GS		 6771 I32 ind;
6772 char *key;
6773 STRLEN keylen;
6774 SVOP *first_key_op, *key_op;
9615e741
GS		 6775
6776 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6777 if ((o->op_private & (OPpLVAL_INTRO))
6778 /* I bet there's always a pushmark... */
6779 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6780 /* hmmm, no optimization if list contains only one key. */
6781 break;
6782 rop = (UNOP*)((LISTOP*)o)->op_last;
6783 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6784 break;
6785 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6786 if (!SvOBJECT(lexname))
6787 break;
6788 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6789 if (!fields || !GvHV(*fields))
6790 break;
6791 /* Again guessing that the pushmark can be jumped over.... */
6792 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6793 ->op_first->op_sibling;
6794 /* Check that the key list contains only constants. */
6795 for (key_op = first_key_op; key_op;
6796 key_op = (SVOP*)key_op->op_sibling)
6797 if (key_op->op_type != OP_CONST)
6798 break;
6799 if (key_op)
6800 break;
6801 rop->op_type = OP_RV2AV;
6802 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6803 o->op_type = OP_ASLICE;
6804 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6805 for (key_op = first_key_op; key_op;
6806 key_op = (SVOP*)key_op->op_sibling) {
6807 svp = cSVOPx_svp(key_op);
6808 key = SvPV(*svp, keylen);
6809 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6810 if (!indsvp) {
9615e741
GS		 6811 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6812 "in variable %s of type %s",
345599ca
GS		 6813 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6814 }
6815 ind = SvIV(*indsvp);
6816 if (ind < 1)
6817 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6818 sv = newSViv(ind);
6819 if (SvREADONLY(*svp))
6820 SvREADONLY_on(sv);
6821 SvFLAGS(sv) |= (SvFLAGS(*svp)
6822 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6823 SvREFCNT_dec(*svp);
9615e741 6824 *svp = sv;
345599ca
GS		 6825 }
6826 break;
6827 }
c750a3ec 6828
cd06dffe
GS		 6829 case OP_RV2AV:
6830 case OP_RV2HV:
6831 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6832 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6833 {
cd06dffe 6834 last_composite = o;
e1f15930 6835 }
cd06dffe
GS		 6836 o->op_seq = PL_op_seqmax++;
6837 break;
6838
6839 case OP_RETURN:
970c4905 6840 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6841 o->op_seq = PL_op_seqmax++;
6842 break;
6843 }
6844 /* FALL THROUGH */
6845
6846 case OP_LEAVESUBLV:
6847 if (last_composite) {
6848 OP *r = last_composite;
6849
6850 while (r->op_sibling)
6851 r = r->op_sibling;
1c846c1f 6852 if (r->op_next == o
cd06dffe
GS		 6853 || (r->op_next->op_type == OP_LIST
6854 && r->op_next->op_next == o))
6855 {
6856 if (last_composite->op_type == OP_RV2AV)
6857 yyerror("Lvalue subs returning arrays not implemented yet");
6858 else
6859 yyerror("Lvalue subs returning hashes not implemented yet");
6860 ;
6861 }
6862 }
6863 /* FALL THROUGH */
6864
79072805 6865 default:
3280af22 6866 o->op_seq = PL_op_seqmax++;
79072805
LW		 6867 break;
6868 }
a0d0e21e 6869 oldop = o;
79072805 6870 }
a0d0e21e 6871 LEAVE;
79072805 6872}
beab0874
JT		 6873
6874#include "XSUB.h"
6875
6876/* Efficient sub that returns a constant scalar value. */
6877static void
6878const_sv_xsub(pTHXo_ CV* cv)
6879{
6880 dXSARGS;
9a049f1c 6881 EXTEND(sp, 1);
0768512c 6882 ST(0) = (SV*)XSANY.any_ptr;
beab0874
JT		 6883 XSRETURN(1);
6884}
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