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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{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 153 "\"%s\" variable %s masks earlier declaration in same %s",
33633739
GS		 154 (PL_in_my == KEY_our ? "our" : "my"),
155 name,
156 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
157 --off;
158 break;
159 }
160 }
161 if (PL_in_my == KEY_our) {
635bab04 162 do {
33633739
GS		 163 if ((sv = svp[off])
164 && sv != &PL_sv_undef
5ce0178e 165 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 166 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
167 && strEQ(name, SvPVX(sv)))
f472eb5c 168 {
e476b1b5 169 Perl_warner(aTHX_ WARN_MISC,
33633739 170 "\"our\" variable %s redeclared", name);
e476b1b5 171 Perl_warner(aTHX_ WARN_MISC,
cc507455 172 "\t(Did you mean \"local\" instead of \"our\"?)\n");
33633739 173 break;
f472eb5c 174 }
635bab04 175 } while ( off-- > 0 );
b1cb66bf 176 }
177 }
a0d0e21e
LW		 178 off = pad_alloc(OP_PADSV, SVs_PADMY);
179 sv = NEWSV(1102,0);
93a17b20
LW		 180 sv_upgrade(sv, SVt_PVNV);
181 sv_setpv(sv, name);
3280af22 182 if (PL_in_my_stash) {
c750a3ec 183 if (*name != '$')
eb64745e
GS		 184 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
185 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 186 SvOBJECT_on(sv);
187 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 188 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
189 PL_sv_objcount++;
c750a3ec 190 }
f472eb5c
GS		 191 if (PL_in_my == KEY_our) {
192 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 193 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 194 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 195 }
3280af22 196 av_store(PL_comppad_name, off, sv);
65202027 197 SvNVX(sv) = (NV)PAD_MAX;
8990e307 198 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 199 if (!PL_min_intro_pending)
200 PL_min_intro_pending = off;
201 PL_max_intro_pending = off;
93a17b20 202 if (*name == '@')
3280af22 203 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 204 else if (*name == '%')
3280af22
NIS		 205 av_store(PL_comppad, off, (SV*)newHV());
206 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 207 return off;
208}
209
94f23f41
GS		 210STATIC PADOFFSET
211S_pad_addlex(pTHX_ SV *proto_namesv)
212{
213 SV *namesv = NEWSV(1103,0);
214 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
215 sv_upgrade(namesv, SVt_PVNV);
216 sv_setpv(namesv, SvPVX(proto_namesv));
217 av_store(PL_comppad_name, newoff, namesv);
218 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
219 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
220 SvFAKE_on(namesv); /* A ref, not a real var */
221 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
222 SvFLAGS(namesv) |= SVpad_OUR;
223 (void)SvUPGRADE(namesv, SVt_PVGV);
224 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
225 }
226 if (SvOBJECT(proto_namesv)) { /* A typed var */
227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
230 PL_sv_objcount++;
231 }
232 return newoff;
233}
234
2680586e
GS		 235#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
236
76e3520e 237STATIC PADOFFSET
cea2e8a9 238S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 239 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 240{
11343788 241 dTHR;
748a9306 242 CV *cv;
93a17b20
LW		 243 I32 off;
244 SV *sv;
93a17b20 245 register I32 i;
c09156bb 246 register PERL_CONTEXT *cx;
93a17b20 247
748a9306 248 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 249 AV *curlist = CvPADLIST(cv);
250 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 251 AV *curname;
4fdae800 252
3280af22 253 if (!svp || *svp == &PL_sv_undef)
4633a7c4 254 continue;
748a9306
LW		 255 curname = (AV*)*svp;
256 svp = AvARRAY(curname);
93965878 257 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 258 if ((sv = svp[off]) &&
3280af22 259 sv != &PL_sv_undef &&
748a9306 260 seq <= SvIVX(sv) &&
13826f2c 261 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 262 strEQ(SvPVX(sv), name))
263 {
5f05dabc 264 I32 depth;
265 AV *oldpad;
266 SV *oldsv;
267
268 depth = CvDEPTH(cv);
269 if (!depth) {
9607fc9c 270 if (newoff) {
271 if (SvFAKE(sv))
272 continue;
4fdae800 273 return 0; /* don't clone from inactive stack frame */
9607fc9c 274 }
5f05dabc 275 depth = 1;
276 }
94f23f41 277 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 278 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 279 if (!newoff) { /* Not a mere clone operation. */
94f23f41 280 newoff = pad_addlex(sv);
3280af22 281 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 282 /* "It's closures all the way down." */
3280af22 283 CvCLONE_on(PL_compcv);
54310121 284 if (cv == startcv) {
3280af22 285 if (CvANON(PL_compcv))
54310121 286 oldsv = Nullsv; /* no need to keep ref */
287 }
288 else {
28757baa 289 CV *bcv;
290 for (bcv = startcv;
291 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 292 bcv = CvOUTSIDE(bcv))
293 {
94f23f41
GS		 294 if (CvANON(bcv)) {
295 /* install the missing pad entry in intervening
296 * nested subs and mark them cloneable.
297 * XXX fix pad_foo() to not use globals */
298 AV *ocomppad_name = PL_comppad_name;
299 AV *ocomppad = PL_comppad;
300 SV **ocurpad = PL_curpad;
301 AV *padlist = CvPADLIST(bcv);
302 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
303 PL_comppad = (AV*)AvARRAY(padlist)[1];
304 PL_curpad = AvARRAY(PL_comppad);
305 pad_addlex(sv);
306 PL_comppad_name = ocomppad_name;
307 PL_comppad = ocomppad;
308 PL_curpad = ocurpad;
28757baa 309 CvCLONE_on(bcv);
94f23f41 310 }
28757baa 311 else {
6b35e009
GS		 312 if (ckWARN(WARN_CLOSURE)
313 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
314 {
cea2e8a9 315 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 316 "Variable \"%s\" may be unavailable",
28757baa 317 name);
6b35e009 318 }
28757baa 319 break;
320 }
321 }
322 }
323 }
3280af22 324 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 325 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
326 && !(SvFLAGS(sv) & SVpad_OUR))
327 {
cea2e8a9 328 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 329 "Variable \"%s\" will not stay shared", name);
741b6338 330 }
5f05dabc 331 }
748a9306 332 }
3280af22 333 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 334 return newoff;
335 }
93a17b20
LW		 336 }
337 }
338
2680586e
GS		 339 if (flags & FINDLEX_NOSEARCH)
340 return 0;
341
93a17b20
LW		 342 /* Nothing in current lexical context--try eval's context, if any.
343 * This is necessary to let the perldb get at lexically scoped variables.
344 * XXX This will also probably interact badly with eval tree caching.
345 */
346
748a9306 347 for (i = cx_ix; i >= 0; i--) {
93a17b20 348 cx = &cxstack[i];
6b35e009 349 switch (CxTYPE(cx)) {
93a17b20 350 default:
748a9306
LW		 351 if (i == 0 && saweval) {
352 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 353 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 354 }
93a17b20
LW		 355 break;
356 case CXt_EVAL:
44a8e56a 357 switch (cx->blk_eval.old_op_type) {
358 case OP_ENTEREVAL:
6b35e009
GS		 359 if (CxREALEVAL(cx))
360 saweval = i;
44a8e56a 361 break;
faa7e5bb 362 case OP_DOFILE:
44a8e56a 363 case OP_REQUIRE:
faa7e5bb 364 /* require/do must have their own scope */
44a8e56a 365 return 0;
366 }
93a17b20 367 break;
7766f137 368 case CXt_FORMAT:
93a17b20
LW		 369 case CXt_SUB:
370 if (!saweval)
371 return 0;
372 cv = cx->blk_sub.cv;
3280af22 373 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 374 saweval = i; /* so we know where we were called from */
93a17b20 375 continue;
93a17b20 376 }
748a9306 377 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 378 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 379 }
380 }
381
748a9306
LW		 382 return 0;
383}
a0d0e21e 384
748a9306 385PADOFFSET
864dbfa3 386Perl_pad_findmy(pTHX_ char *name)
748a9306 387{
11343788 388 dTHR;
748a9306 389 I32 off;
54310121 390 I32 pendoff = 0;
748a9306 391 SV *sv;
3280af22
NIS		 392 SV **svp = AvARRAY(PL_comppad_name);
393 U32 seq = PL_cop_seqmax;
6b35e009 394 PERL_CONTEXT *cx;
33b8ce05 395 CV *outside;
748a9306 396
11343788
MB		 397#ifdef USE_THREADS
398 /*
399 * Special case to get lexical (and hence per-thread) @_.
400 * XXX I need to find out how to tell at parse-time whether use
401 * of @_ should refer to a lexical (from a sub) or defgv (global
402 * scope and maybe weird sub-ish things like formats). See
403 * startsub in perly.y. It's possible that @_ could be lexical
404 * (at least from subs) even in non-threaded perl.
405 */
406 if (strEQ(name, "@_"))
407 return 0; /* success. (NOT_IN_PAD indicates failure) */
408#endif /* USE_THREADS */
409
748a9306 410 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 411 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 412 if ((sv = svp[off]) &&
3280af22 413 sv != &PL_sv_undef &&
54310121 414 (!SvIVX(sv) ||
415 (seq <= SvIVX(sv) &&
416 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 417 strEQ(SvPVX(sv), name))
418 {
77ca0c92 419 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 420 return (PADOFFSET)off;
421 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 422 }
423 }
748a9306 424
33b8ce05
GS		 425 outside = CvOUTSIDE(PL_compcv);
426
427 /* Check if if we're compiling an eval'', and adjust seq to be the
428 * eval's seq number. This depends on eval'' having a non-null
429 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 430 * identified by CvEVAL being true and CvGV being null. */
431 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 432 cx = &cxstack[cxstack_ix];
433 if (CxREALEVAL(cx))
434 seq = cx->blk_oldcop->cop_seq;
435 }
436
748a9306 437 /* See if it's in a nested scope */
2680586e 438 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 439 if (off) {
440 /* If there is a pending local definition, this new alias must die */
441 if (pendoff)
3280af22 442 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 443 return off; /* pad_findlex returns 0 for failure...*/
54310121 444 }
11343788 445 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 446}
447
448void
864dbfa3 449Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 450{
0453d815 451 dTHR;
93a17b20 452 I32 off;
3280af22 453 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 454 SV *sv;
3280af22
NIS		 455 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
456 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 457 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
458 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 459 }
460 }
461 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 462 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 463 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 464 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 465 }
466}
467
468PADOFFSET
864dbfa3 469Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 470{
11343788 471 dTHR;
79072805
LW		 472 SV *sv;
473 I32 retval;
474
3280af22 475 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 476 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 477 if (PL_pad_reset_pending)
a0d0e21e 478 pad_reset();
ed6116ce 479 if (tmptype & SVs_PADMY) {
79072805 480 do {
3280af22 481 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 482 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 483 retval = AvFILLp(PL_comppad);
79072805
LW		 484 }
485 else {
3280af22
NIS		 486 SV **names = AvARRAY(PL_comppad_name);
487 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 488 for (;;) {
489 /*
490 * "foreach" index vars temporarily become aliases to non-"my"
491 * values. Thus we must skip, not just pad values that are
492 * marked as current pad values, but also those with names.
493 */
3280af22
NIS		 494 if (++PL_padix <= names_fill &&
495 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 496 continue;
3280af22 497 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
3049cdab
SB		 498 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) &&
499 !IS_PADGV(sv) && !IS_PADCONST(sv))
bbce6d69 500 break;
501 }
3280af22 502 retval = PL_padix;
79072805 503 }
8990e307 504 SvFLAGS(sv) |= tmptype;
3280af22 505 PL_curpad = AvARRAY(PL_comppad);
11343788 506#ifdef USE_THREADS
b900a521
JH		 507 DEBUG_X(PerlIO_printf(Perl_debug_log,
508 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
509 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 510 (long) retval, PL_op_name[optype]));
11343788 511#else
b900a521
JH		 512 DEBUG_X(PerlIO_printf(Perl_debug_log,
513 "Pad 0x%"UVxf" alloc %ld for %s\n",
514 PTR2UV(PL_curpad),
22c35a8c 515 (long) retval, PL_op_name[optype]));
11343788 516#endif /* USE_THREADS */
79072805
LW		 517 return (PADOFFSET)retval;
518}
519
520SV *
864dbfa3 521Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 522{
11343788
MB		 523 dTHR;
524#ifdef USE_THREADS
b900a521 525 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 526 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
527 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 528#else
79072805 529 if (!po)
cea2e8a9 530 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 531 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
532 PTR2UV(PL_curpad), (IV)po));
11343788 533#endif /* USE_THREADS */
3280af22 534 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 535}
536
537void
864dbfa3 538Perl_pad_free(pTHX_ PADOFFSET po)
79072805 539{
11343788 540 dTHR;
3280af22 541 if (!PL_curpad)
a0d0e21e 542 return;
3280af22 543 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 544 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 545 if (!po)
cea2e8a9 546 Perl_croak(aTHX_ "panic: pad_free po");
11343788 547#ifdef USE_THREADS
b900a521 548 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 549 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 550 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 551#else
97835f67
JH		 552 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
553 PTR2UV(PL_curpad), (IV)po));
11343788 554#endif /* USE_THREADS */
2aa1bedc 555 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 556 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 557#ifdef USE_ITHREADS
558 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
559#endif
560 }
3280af22
NIS		 561 if ((I32)po < PL_padix)
562 PL_padix = po - 1;
79072805
LW		 563}
564
565void
864dbfa3 566Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 567{
11343788 568 dTHR;
3280af22 569 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 570 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 571 if (!po)
cea2e8a9 572 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 573#ifdef USE_THREADS
b900a521 574 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 575 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
576 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 577#else
97835f67
JH		 578 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
579 PTR2UV(PL_curpad), (IV)po));
11343788 580#endif /* USE_THREADS */
3280af22
NIS		 581 SvPADTMP_off(PL_curpad[po]);
582 PL_curpad[po] = NEWSV(1107,0);
583 SvPADTMP_on(PL_curpad[po]);
584 if ((I32)po < PL_padix)
585 PL_padix = po - 1;
79072805
LW		 586}
587
d9bb4600
GS		 588/* XXX pad_reset() is currently disabled because it results in serious bugs.
589 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
590 * on the stack by OPs that use them, there are several ways to get an alias
591 * to a shared TARG. Such an alias will change randomly and unpredictably.
592 * We avoid doing this until we can think of a Better Way.
593 * GSAR 97-10-29 */
79072805 594void
864dbfa3 595Perl_pad_reset(pTHX)
79072805 596{
d9bb4600 597#ifdef USE_BROKEN_PAD_RESET
11343788 598 dTHR;
79072805
LW		 599 register I32 po;
600
6b88bc9c 601 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 602 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 603#ifdef USE_THREADS
b900a521
JH		 604 DEBUG_X(PerlIO_printf(Perl_debug_log,
605 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
606 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 607#else
b900a521
JH		 608 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
609 PTR2UV(PL_curpad)));
11343788 610#endif /* USE_THREADS */
6b88bc9c
GS		 611 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
612 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
613 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
614 SvPADTMP_off(PL_curpad[po]);
748a9306 615 }
6b88bc9c 616 PL_padix = PL_padix_floor;
79072805 617 }
d9bb4600 618#endif
3280af22 619 PL_pad_reset_pending = FALSE;
79072805
LW		 620}
621
a863c7d1 622#ifdef USE_THREADS
54b9620d 623/* find_threadsv is not reentrant */
a863c7d1 624PADOFFSET
864dbfa3 625Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 626{
627 dTHR;
628 char *p;
629 PADOFFSET key;
554b3eca 630 SV **svp;
54b9620d 631 /* We currently only handle names of a single character */
533c011a 632 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 633 if (!p)
634 return NOT_IN_PAD;
533c011a 635 key = p - PL_threadsv_names;
2d8e6c8d 636 MUTEX_LOCK(&thr->mutex);
54b9620d 637 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 638 if (svp)
639 MUTEX_UNLOCK(&thr->mutex);
640 else {
554b3eca 641 SV *sv = NEWSV(0, 0);
54b9620d 642 av_store(thr->threadsv, key, sv);
940cb80d 643 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 644 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 645 /*
646 * Some magic variables used to be automagically initialised
647 * in gv_fetchpv. Those which are now per-thread magicals get
648 * initialised here instead.
649 */
650 switch (*name) {
54b9620d
MB		 651 case '_':
652 break;
554b3eca
MB		 653 case ';':
654 sv_setpv(sv, "\034");
1c846c1f 655 sv_magic(sv, 0, 0, name, 1);
554b3eca 656 break;
c277df42
IZ		 657 case '&':
658 case '`':
659 case '\'':
533c011a 660 PL_sawampersand = TRUE;
a3f914c5
GS		 661 /* FALL THROUGH */
662 case '1':
663 case '2':
664 case '3':
665 case '4':
666 case '5':
667 case '6':
668 case '7':
669 case '8':
670 case '9':
c277df42 671 SvREADONLY_on(sv);
d8b5173a 672 /* FALL THROUGH */
067391ea
GS		 673
674 /* XXX %! tied to Errno.pm needs to be added here.
675 * See gv_fetchpv(). */
676 /* case '!': */
677
54b9620d 678 default:
1c846c1f 679 sv_magic(sv, 0, 0, name, 1);
554b3eca 680 }
bf49b057 681 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 682 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 683 sv, (*name < 32) ? "^" : "",
684 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 685 }
686 return key;
687}
688#endif /* USE_THREADS */
689
79072805
LW		 690/* Destructor */
691
692void
864dbfa3 693Perl_op_free(pTHX_ OP *o)
79072805 694{
85e6fe83 695 register OP *kid, *nextkid;
acb36ea4 696 OPCODE type;
79072805 697
5dc0d613 698 if (!o || o->op_seq == (U16)-1)
79072805
LW		 699 return;
700
7934575e
GS		 701 if (o->op_private & OPpREFCOUNTED) {
702 switch (o->op_type) {
703 case OP_LEAVESUB:
704 case OP_LEAVESUBLV:
705 case OP_LEAVEEVAL:
706 case OP_LEAVE:
707 case OP_SCOPE:
708 case OP_LEAVEWRITE:
709 OP_REFCNT_LOCK;
710 if (OpREFCNT_dec(o)) {
711 OP_REFCNT_UNLOCK;
712 return;
713 }
714 OP_REFCNT_UNLOCK;
715 break;
716 default:
717 break;
718 }
719 }
720
11343788
MB		 721 if (o->op_flags & OPf_KIDS) {
722 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 723 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 724 op_free(kid);
85e6fe83 725 }
79072805 726 }
acb36ea4
GS		 727 type = o->op_type;
728 if (type == OP_NULL)
729 type = o->op_targ;
730
731 /* COP* is not cleared by op_clear() so that we may track line
732 * numbers etc even after null() */
733 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
734 cop_free((COP*)o);
735
736 op_clear(o);
737
738#ifdef PL_OP_SLAB_ALLOC
739 if ((char *) o == PL_OpPtr)
740 {
741 }
742#else
743 Safefree(o);
744#endif
745}
79072805 746
acb36ea4
GS		 747STATIC void
748S_op_clear(pTHX_ OP *o)
749{
11343788 750 switch (o->op_type) {
acb36ea4
GS		 751 case OP_NULL: /* Was holding old type, if any. */
752 case OP_ENTEREVAL: /* Was holding hints. */
753#ifdef USE_THREADS
754 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
755#endif
756 o->op_targ = 0;
a0d0e21e 757 break;
554b3eca 758#ifdef USE_THREADS
8dd3ba40
SM		 759 case OP_ENTERITER:
760 if (!(o->op_flags & OPf_SPECIAL))
761 break;
762 /* FALL THROUGH */
554b3eca 763#endif /* USE_THREADS */
a6006777 764 default:
ac4c12e7 765 if (!(o->op_flags & OPf_REF)
0b94c7bb 766 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 767 break;
768 /* FALL THROUGH */
463ee0b2 769 case OP_GVSV:
79072805 770 case OP_GV:
a6006777 771 case OP_AELEMFAST:
350de78d 772#ifdef USE_ITHREADS
971a9dd3
GS		 773 if (cPADOPo->op_padix > 0) {
774 if (PL_curpad) {
638eceb6 775 GV *gv = cGVOPo_gv;
971a9dd3
GS		 776 pad_swipe(cPADOPo->op_padix);
777 /* No GvIN_PAD_off(gv) here, because other references may still
778 * exist on the pad */
779 SvREFCNT_dec(gv);
780 }
781 cPADOPo->op_padix = 0;
782 }
350de78d 783#else
971a9dd3 784 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 785 cSVOPo->op_sv = Nullsv;
350de78d 786#endif
79072805 787 break;
a1ae71d2 788 case OP_METHOD_NAMED:
79072805 789 case OP_CONST:
11343788 790 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 791 cSVOPo->op_sv = Nullsv;
79072805 792 break;
748a9306
LW		 793 case OP_GOTO:
794 case OP_NEXT:
795 case OP_LAST:
796 case OP_REDO:
11343788 797 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 798 break;
799 /* FALL THROUGH */
a0d0e21e 800 case OP_TRANS:
acb36ea4 801 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 802 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 803 cSVOPo->op_sv = Nullsv;
804 }
805 else {
a0ed51b3 806 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 807 cPVOPo->op_pv = Nullch;
808 }
a0d0e21e
LW		 809 break;
810 case OP_SUBST:
11343788 811 op_free(cPMOPo->op_pmreplroot);
971a9dd3 812 goto clear_pmop;
748a9306 813 case OP_PUSHRE:
971a9dd3
GS		 814#ifdef USE_ITHREADS
815 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
816 if (PL_curpad) {
817 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
818 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
819 /* No GvIN_PAD_off(gv) here, because other references may still
820 * exist on the pad */
821 SvREFCNT_dec(gv);
822 }
823 }
824#else
825 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
826#endif
827 /* FALL THROUGH */
a0d0e21e 828 case OP_MATCH:
8782bef2 829 case OP_QR:
971a9dd3
GS		 830clear_pmop:
831 cPMOPo->op_pmreplroot = Nullop;
c277df42 832 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 833 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 834 break;
79072805
LW		 835 }
836
743e66e6 837 if (o->op_targ > 0) {
11343788 838 pad_free(o->op_targ);
743e66e6
GS		 839 o->op_targ = 0;
840 }
79072805
LW		 841}
842
76e3520e 843STATIC void
3eb57f73
HS		 844S_cop_free(pTHX_ COP* cop)
845{
846 Safefree(cop->cop_label);
57843af0 847#ifdef USE_ITHREADS
f4dd75d9
GS		 848 Safefree(CopFILE(cop)); /* XXX share in a pvtable? */
849 Safefree(CopSTASHPV(cop)); /* XXX share in a pvtable? */
57843af0 850#else
11faa288 851 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 852 SvREFCNT_dec(CopFILEGV(cop));
57843af0 853#endif
0453d815 854 if (! specialWARN(cop->cop_warnings))
3eb57f73 855 SvREFCNT_dec(cop->cop_warnings);
ac27b0f5
NIS		 856 if (! specialCopIO(cop->cop_io))
857 SvREFCNT_dec(cop->cop_io);
3eb57f73
HS		 858}
859
860STATIC void
cea2e8a9 861S_null(pTHX_ OP *o)
8990e307 862{
acb36ea4
GS		 863 if (o->op_type == OP_NULL)
864 return;
865 op_clear(o);
11343788
MB		 866 o->op_targ = o->op_type;
867 o->op_type = OP_NULL;
22c35a8c 868 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 869}
870
79072805
LW		 871/* Contextualizers */
872
463ee0b2 873#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 874
875OP *
864dbfa3 876Perl_linklist(pTHX_ OP *o)
79072805
LW		 877{
878 register OP *kid;
879
11343788
MB		 880 if (o->op_next)
881 return o->op_next;
79072805
LW		 882
883 /* establish postfix order */
11343788
MB		 884 if (cUNOPo->op_first) {
885 o->op_next = LINKLIST(cUNOPo->op_first);
886 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 887 if (kid->op_sibling)
888 kid->op_next = LINKLIST(kid->op_sibling);
889 else
11343788 890 kid->op_next = o;
79072805
LW		 891 }
892 }
893 else
11343788 894 o->op_next = o;
79072805 895
11343788 896 return o->op_next;
79072805
LW		 897}
898
899OP *
864dbfa3 900Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 901{
902 OP *kid;
11343788
MB		 903 if (o && o->op_flags & OPf_KIDS) {
904 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 905 scalar(kid);
906 }
11343788 907 return o;
79072805
LW		 908}
909
76e3520e 910STATIC OP *
cea2e8a9 911S_scalarboolean(pTHX_ OP *o)
8990e307 912{
d008e5eb 913 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 914 dTHR;
d008e5eb 915 if (ckWARN(WARN_SYNTAX)) {
57843af0 916 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 917
d008e5eb 918 if (PL_copline != NOLINE)
57843af0 919 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 920 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 921 CopLINE_set(PL_curcop, oldline);
d008e5eb 922 }
a0d0e21e 923 }
11343788 924 return scalar(o);
8990e307
LW		 925}
926
927OP *
864dbfa3 928Perl_scalar(pTHX_ OP *o)
79072805
LW		 929{
930 OP *kid;
931
a0d0e21e 932 /* assumes no premature commitment */
3280af22 933 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 934 || o->op_type == OP_RETURN)
7e363e51 935 {
11343788 936 return o;
7e363e51 937 }
79072805 938
5dc0d613 939 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 940
11343788 941 switch (o->op_type) {
79072805 942 case OP_REPEAT:
11343788
MB		 943 if (o->op_private & OPpREPEAT_DOLIST)
944 null(((LISTOP*)cBINOPo->op_first)->op_first);
945 scalar(cBINOPo->op_first);
8990e307 946 break;
79072805
LW		 947 case OP_OR:
948 case OP_AND:
949 case OP_COND_EXPR:
11343788 950 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 951 scalar(kid);
79072805 952 break;
a0d0e21e 953 case OP_SPLIT:
11343788 954 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 955 if (!kPMOP->op_pmreplroot)
956 deprecate("implicit split to @_");
957 }
958 /* FALL THROUGH */
79072805 959 case OP_MATCH:
8782bef2 960 case OP_QR:
79072805
LW		 961 case OP_SUBST:
962 case OP_NULL:
8990e307 963 default:
11343788
MB		 964 if (o->op_flags & OPf_KIDS) {
965 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 966 scalar(kid);
967 }
79072805
LW		 968 break;
969 case OP_LEAVE:
970 case OP_LEAVETRY:
5dc0d613 971 kid = cLISTOPo->op_first;
54310121 972 scalar(kid);
155aba94 973 while ((kid = kid->op_sibling)) {
54310121 974 if (kid->op_sibling)
975 scalarvoid(kid);
976 else
977 scalar(kid);
978 }
3280af22 979 WITH_THR(PL_curcop = &PL_compiling);
54310121 980 break;
748a9306 981 case OP_SCOPE:
79072805 982 case OP_LINESEQ:
8990e307 983 case OP_LIST:
11343788 984 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 985 if (kid->op_sibling)
986 scalarvoid(kid);
987 else
988 scalar(kid);
989 }
3280af22 990 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 991 break;
992 }
11343788 993 return o;
79072805
LW		 994}
995
996OP *
864dbfa3 997Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 998{
999 OP *kid;
8990e307
LW		 1000 char* useless = 0;
1001 SV* sv;
2ebea0a1
GS		 1002 U8 want;
1003
acb36ea4
GS		 1004 if (o->op_type == OP_NEXTSTATE
1005 || o->op_type == OP_SETSTATE
1006 || o->op_type == OP_DBSTATE
1007 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1008 || o->op_targ == OP_SETSTATE
1009 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1010 {
1011 dTHR;
1012 PL_curcop = (COP*)o; /* for warning below */
1013 }
79072805 1014
54310121 1015 /* assumes no premature commitment */
2ebea0a1
GS		 1016 want = o->op_flags & OPf_WANT;
1017 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1018 || o->op_type == OP_RETURN)
7e363e51 1019 {
11343788 1020 return o;
7e363e51 1021 }
79072805 1022
b162f9ea 1023 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1024 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1025 {
b162f9ea 1026 return scalar(o); /* As if inside SASSIGN */
7e363e51 1027 }
1c846c1f 1028
5dc0d613 1029 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1030
11343788 1031 switch (o->op_type) {
79072805 1032 default:
22c35a8c 1033 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1034 break;
36477c24 1035 /* FALL THROUGH */
1036 case OP_REPEAT:
11343788 1037 if (o->op_flags & OPf_STACKED)
8990e307 1038 break;
5d82c453
GA		 1039 goto func_ops;
1040 case OP_SUBSTR:
1041 if (o->op_private == 4)
1042 break;
8990e307
LW		 1043 /* FALL THROUGH */
1044 case OP_GVSV:
1045 case OP_WANTARRAY:
1046 case OP_GV:
1047 case OP_PADSV:
1048 case OP_PADAV:
1049 case OP_PADHV:
1050 case OP_PADANY:
1051 case OP_AV2ARYLEN:
8990e307 1052 case OP_REF:
a0d0e21e
LW		 1053 case OP_REFGEN:
1054 case OP_SREFGEN:
8990e307
LW		 1055 case OP_DEFINED:
1056 case OP_HEX:
1057 case OP_OCT:
1058 case OP_LENGTH:
8990e307
LW		 1059 case OP_VEC:
1060 case OP_INDEX:
1061 case OP_RINDEX:
1062 case OP_SPRINTF:
1063 case OP_AELEM:
1064 case OP_AELEMFAST:
1065 case OP_ASLICE:
8990e307
LW		 1066 case OP_HELEM:
1067 case OP_HSLICE:
1068 case OP_UNPACK:
1069 case OP_PACK:
8990e307
LW		 1070 case OP_JOIN:
1071 case OP_LSLICE:
1072 case OP_ANONLIST:
1073 case OP_ANONHASH:
1074 case OP_SORT:
1075 case OP_REVERSE:
1076 case OP_RANGE:
1077 case OP_FLIP:
1078 case OP_FLOP:
1079 case OP_CALLER:
1080 case OP_FILENO:
1081 case OP_EOF:
1082 case OP_TELL:
1083 case OP_GETSOCKNAME:
1084 case OP_GETPEERNAME:
1085 case OP_READLINK:
1086 case OP_TELLDIR:
1087 case OP_GETPPID:
1088 case OP_GETPGRP:
1089 case OP_GETPRIORITY:
1090 case OP_TIME:
1091 case OP_TMS:
1092 case OP_LOCALTIME:
1093 case OP_GMTIME:
1094 case OP_GHBYNAME:
1095 case OP_GHBYADDR:
1096 case OP_GHOSTENT:
1097 case OP_GNBYNAME:
1098 case OP_GNBYADDR:
1099 case OP_GNETENT:
1100 case OP_GPBYNAME:
1101 case OP_GPBYNUMBER:
1102 case OP_GPROTOENT:
1103 case OP_GSBYNAME:
1104 case OP_GSBYPORT:
1105 case OP_GSERVENT:
1106 case OP_GPWNAM:
1107 case OP_GPWUID:
1108 case OP_GGRNAM:
1109 case OP_GGRGID:
1110 case OP_GETLOGIN:
5d82c453 1111 func_ops:
64aac5a9 1112 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1113 useless = PL_op_desc[o->op_type];
8990e307
LW		 1114 break;
1115
1116 case OP_RV2GV:
1117 case OP_RV2SV:
1118 case OP_RV2AV:
1119 case OP_RV2HV:
192587c2 1120 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1121 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1122 useless = "a variable";
1123 break;
79072805
LW		 1124
1125 case OP_CONST:
7766f137 1126 sv = cSVOPo_sv;
7a52d87a
GS		 1127 if (cSVOPo->op_private & OPpCONST_STRICT)
1128 no_bareword_allowed(o);
1129 else {
d008e5eb
GS		 1130 dTHR;
1131 if (ckWARN(WARN_VOID)) {
1132 useless = "a constant";
1133 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1134 useless = 0;
1135 else if (SvPOK(sv)) {
1136 if (strnEQ(SvPVX(sv), "di", 2) ||
1137 strnEQ(SvPVX(sv), "ds", 2) ||
1138 strnEQ(SvPVX(sv), "ig", 2))
1139 useless = 0;
1140 }
8990e307
LW		 1141 }
1142 }
acb36ea4 1143 null(o); /* don't execute or even remember it */
79072805
LW		 1144 break;
1145
1146 case OP_POSTINC:
11343788 1147 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1148 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1149 break;
1150
1151 case OP_POSTDEC:
11343788 1152 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1153 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1154 break;
1155
79072805
LW		 1156 case OP_OR:
1157 case OP_AND:
1158 case OP_COND_EXPR:
11343788 1159 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1160 scalarvoid(kid);
1161 break;
5aabfad6 1162
a0d0e21e 1163 case OP_NULL:
11343788 1164 if (o->op_flags & OPf_STACKED)
a0d0e21e 1165 break;
5aabfad6 1166 /* FALL THROUGH */
2ebea0a1
GS		 1167 case OP_NEXTSTATE:
1168 case OP_DBSTATE:
79072805
LW		 1169 case OP_ENTERTRY:
1170 case OP_ENTER:
11343788 1171 if (!(o->op_flags & OPf_KIDS))
79072805 1172 break;
54310121 1173 /* FALL THROUGH */
463ee0b2 1174 case OP_SCOPE:
79072805
LW		 1175 case OP_LEAVE:
1176 case OP_LEAVETRY:
a0d0e21e 1177 case OP_LEAVELOOP:
79072805 1178 case OP_LINESEQ:
79072805 1179 case OP_LIST:
11343788 1180 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1181 scalarvoid(kid);
1182 break;
c90c0ff4 1183 case OP_ENTEREVAL:
5196be3e 1184 scalarkids(o);
c90c0ff4 1185 break;
5aabfad6 1186 case OP_REQUIRE:
c90c0ff4 1187 /* all requires must return a boolean value */
5196be3e 1188 o->op_flags &= ~OPf_WANT;
d6483035
GS		 1189 /* FALL THROUGH */
1190 case OP_SCALAR:
5196be3e 1191 return scalar(o);
a0d0e21e 1192 case OP_SPLIT:
11343788 1193 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1194 if (!kPMOP->op_pmreplroot)
1195 deprecate("implicit split to @_");
1196 }
1197 break;
79072805 1198 }
d008e5eb
GS		 1199 if (useless) {
1200 dTHR;
1201 if (ckWARN(WARN_VOID))
cea2e8a9 1202 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1203 }
11343788 1204 return o;
79072805
LW		 1205}
1206
1207OP *
864dbfa3 1208Perl_listkids(pTHX_ OP *o)
79072805
LW		 1209{
1210 OP *kid;
11343788
MB		 1211 if (o && o->op_flags & OPf_KIDS) {
1212 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1213 list(kid);
1214 }
11343788 1215 return o;
79072805
LW		 1216}
1217
1218OP *
864dbfa3 1219Perl_list(pTHX_ OP *o)
79072805
LW		 1220{
1221 OP *kid;
1222
a0d0e21e 1223 /* assumes no premature commitment */
3280af22 1224 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1225 || o->op_type == OP_RETURN)
7e363e51 1226 {
11343788 1227 return o;
7e363e51 1228 }
79072805 1229
b162f9ea 1230 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1231 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1232 {
b162f9ea 1233 return o; /* As if inside SASSIGN */
7e363e51 1234 }
1c846c1f 1235
5dc0d613 1236 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1237
11343788 1238 switch (o->op_type) {
79072805
LW		 1239 case OP_FLOP:
1240 case OP_REPEAT:
11343788 1241 list(cBINOPo->op_first);
79072805
LW		 1242 break;
1243 case OP_OR:
1244 case OP_AND:
1245 case OP_COND_EXPR:
11343788 1246 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1247 list(kid);
1248 break;
1249 default:
1250 case OP_MATCH:
8782bef2 1251 case OP_QR:
79072805
LW		 1252 case OP_SUBST:
1253 case OP_NULL:
11343788 1254 if (!(o->op_flags & OPf_KIDS))
79072805 1255 break;
11343788
MB		 1256 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1257 list(cBINOPo->op_first);
1258 return gen_constant_list(o);
79072805
LW		 1259 }
1260 case OP_LIST:
11343788 1261 listkids(o);
79072805
LW		 1262 break;
1263 case OP_LEAVE:
1264 case OP_LEAVETRY:
5dc0d613 1265 kid = cLISTOPo->op_first;
54310121 1266 list(kid);
155aba94 1267 while ((kid = kid->op_sibling)) {
54310121 1268 if (kid->op_sibling)
1269 scalarvoid(kid);
1270 else
1271 list(kid);
1272 }
3280af22 1273 WITH_THR(PL_curcop = &PL_compiling);
54310121 1274 break;
748a9306 1275 case OP_SCOPE:
79072805 1276 case OP_LINESEQ:
11343788 1277 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1278 if (kid->op_sibling)
1279 scalarvoid(kid);
1280 else
1281 list(kid);
1282 }
3280af22 1283 WITH_THR(PL_curcop = &PL_compiling);
79072805 1284 break;
c90c0ff4 1285 case OP_REQUIRE:
1286 /* all requires must return a boolean value */
5196be3e
MB		 1287 o->op_flags &= ~OPf_WANT;
1288 return scalar(o);
79072805 1289 }
11343788 1290 return o;
79072805
LW		 1291}
1292
1293OP *
864dbfa3 1294Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1295{
1296 OP *kid;
1297
11343788
MB		 1298 if (o) {
1299 if (o->op_type == OP_LINESEQ ||
1300 o->op_type == OP_SCOPE ||
1301 o->op_type == OP_LEAVE ||
1302 o->op_type == OP_LEAVETRY)
463ee0b2 1303 {
0f15f207 1304 dTHR;
11343788 1305 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1306 if (kid->op_sibling) {
463ee0b2 1307 scalarvoid(kid);
ed6116ce 1308 }
463ee0b2 1309 }
3280af22 1310 PL_curcop = &PL_compiling;
79072805 1311 }
11343788 1312 o->op_flags &= ~OPf_PARENS;
3280af22 1313 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1314 o->op_flags |= OPf_PARENS;
79072805 1315 }
8990e307 1316 else
11343788
MB		 1317 o = newOP(OP_STUB, 0);
1318 return o;
79072805
LW		 1319}
1320
76e3520e 1321STATIC OP *
cea2e8a9 1322S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1323{
1324 OP *kid;
11343788
MB		 1325 if (o && o->op_flags & OPf_KIDS) {
1326 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1327 mod(kid, type);
79072805 1328 }
11343788 1329 return o;
79072805
LW		 1330}
1331
79072805 1332OP *
864dbfa3 1333Perl_mod(pTHX_ OP *o, I32 type)
79072805 1334{
11343788 1335 dTHR;
79072805 1336 OP *kid;
2d8e6c8d 1337 STRLEN n_a;
79072805 1338
3280af22 1339 if (!o || PL_error_count)
11343788 1340 return o;
79072805 1341
b162f9ea 1342 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1343 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1344 {
b162f9ea 1345 return o;
7e363e51 1346 }
1c846c1f 1347
11343788 1348 switch (o->op_type) {
68dc0745 1349 case OP_UNDEF:
3280af22 1350 PL_modcount++;
5dc0d613 1351 return o;
a0d0e21e 1352 case OP_CONST:
11343788 1353 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1354 goto nomod;
3280af22 1355 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1356 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1357 PL_eval_start = 0;
a0d0e21e
LW		 1358 }
1359 else if (!type) {
3280af22
NIS		 1360 SAVEI32(PL_compiling.cop_arybase);
1361 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1362 }
1363 else if (type == OP_REFGEN)
1364 goto nomod;
1365 else
cea2e8a9 1366 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1367 break;
5f05dabc 1368 case OP_STUB:
5196be3e 1369 if (o->op_flags & OPf_PARENS)
5f05dabc 1370 break;
1371 goto nomod;
a0d0e21e
LW		 1372 case OP_ENTERSUB:
1373 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1374 !(o->op_flags & OPf_STACKED)) {
1375 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1376 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1377 assert(cUNOPo->op_first->op_type == OP_NULL);
1378 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1379 break;
1380 }
cd06dffe
GS		 1381 else { /* lvalue subroutine call */
1382 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1383 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1384 /* Backward compatibility mode: */
1385 o->op_private |= OPpENTERSUB_INARGS;
1386 break;
1387 }
1388 else { /* Compile-time error message: */
1389 OP *kid = cUNOPo->op_first;
1390 CV *cv;
1391 OP *okid;
1392
1393 if (kid->op_type == OP_PUSHMARK)
1394 goto skip_kids;
1395 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1396 Perl_croak(aTHX_
1397 "panic: unexpected lvalue entersub "
1398 "args: type/targ %ld:%ld",
1399 (long)kid->op_type,kid->op_targ);
1400 kid = kLISTOP->op_first;
1401 skip_kids:
1402 while (kid->op_sibling)
1403 kid = kid->op_sibling;
1404 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1405 /* Indirect call */
1406 if (kid->op_type == OP_METHOD_NAMED
1407 || kid->op_type == OP_METHOD)
1408 {
87d7fd28 1409 UNOP *newop;
cd06dffe
GS		 1410
1411 if (kid->op_sibling || kid->op_next != kid) {
1412 yyerror("panic: unexpected optree near method call");
1413 break;
1414 }
1415
87d7fd28 1416 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1417 newop->op_type = OP_RV2CV;
1418 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1419 newop->op_first = Nullop;
1420 newop->op_next = (OP*)newop;
1421 kid->op_sibling = (OP*)newop;
349fd7b7 1422 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1423 break;
1424 }
1c846c1f 1425
cd06dffe
GS		 1426 if (kid->op_type != OP_RV2CV)
1427 Perl_croak(aTHX_
1428 "panic: unexpected lvalue entersub "
1429 "entry via type/targ %ld:%ld",
1430 (long)kid->op_type,kid->op_targ);
1431 kid->op_private |= OPpLVAL_INTRO;
1432 break; /* Postpone until runtime */
1433 }
1434
1435 okid = kid;
1436 kid = kUNOP->op_first;
1437 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1438 kid = kUNOP->op_first;
1439 if (kid->op_type == OP_NULL)
1440 Perl_croak(aTHX_
1441 "Unexpected constant lvalue entersub "
1442 "entry via type/targ %ld:%ld",
1443 (long)kid->op_type,kid->op_targ);
1444 if (kid->op_type != OP_GV) {
1445 /* Restore RV2CV to check lvalueness */
1446 restore_2cv:
1447 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1448 okid->op_next = kid->op_next;
1449 kid->op_next = okid;
1450 }
1451 else
1452 okid->op_next = Nullop;
1453 okid->op_type = OP_RV2CV;
1454 okid->op_targ = 0;
1455 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1456 okid->op_private |= OPpLVAL_INTRO;
1457 break;
1458 }
1459
638eceb6 1460 cv = GvCV(kGVOP_gv);
1c846c1f 1461 if (!cv)
cd06dffe
GS		 1462 goto restore_2cv;
1463 if (CvLVALUE(cv))
1464 break;
1465 }
1466 }
79072805
LW		 1467 /* FALL THROUGH */
1468 default:
a0d0e21e
LW		 1469 nomod:
1470 /* grep, foreach, subcalls, refgen */
1471 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1472 break;
cea2e8a9 1473 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1474 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1475 ? "do block"
1476 : (o->op_type == OP_ENTERSUB
1477 ? "non-lvalue subroutine call"
1478 : PL_op_desc[o->op_type])),
22c35a8c 1479 type ? PL_op_desc[type] : "local"));
11343788 1480 return o;
79072805 1481
a0d0e21e
LW		 1482 case OP_PREINC:
1483 case OP_PREDEC:
1484 case OP_POW:
1485 case OP_MULTIPLY:
1486 case OP_DIVIDE:
1487 case OP_MODULO:
1488 case OP_REPEAT:
1489 case OP_ADD:
1490 case OP_SUBTRACT:
1491 case OP_CONCAT:
1492 case OP_LEFT_SHIFT:
1493 case OP_RIGHT_SHIFT:
1494 case OP_BIT_AND:
1495 case OP_BIT_XOR:
1496 case OP_BIT_OR:
1497 case OP_I_MULTIPLY:
1498 case OP_I_DIVIDE:
1499 case OP_I_MODULO:
1500 case OP_I_ADD:
1501 case OP_I_SUBTRACT:
11343788 1502 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1503 goto nomod;
3280af22 1504 PL_modcount++;
a0d0e21e
LW		 1505 break;
1506
79072805 1507 case OP_COND_EXPR:
11343788 1508 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1509 mod(kid, type);
79072805
LW		 1510 break;
1511
1512 case OP_RV2AV:
1513 case OP_RV2HV:
93af7a87 1514 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1515 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1516 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1517 PL_modcount = 10000;
11343788 1518 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1519 }
1520 /* FALL THROUGH */
79072805 1521 case OP_RV2GV:
5dc0d613 1522 if (scalar_mod_type(o, type))
3fe9a6f1 1523 goto nomod;
11343788 1524 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1525 /* FALL THROUGH */
1526 case OP_AASSIGN:
1527 case OP_ASLICE:
1528 case OP_HSLICE:
93a17b20
LW		 1529 case OP_NEXTSTATE:
1530 case OP_DBSTATE:
a0d0e21e
LW		 1531 case OP_REFGEN:
1532 case OP_CHOMP:
3280af22 1533 PL_modcount = 10000;
79072805 1534 break;
463ee0b2 1535 case OP_RV2SV:
11343788 1536 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1537 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1538 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1539 /* FALL THROUGH */
79072805 1540 case OP_GV:
463ee0b2 1541 case OP_AV2ARYLEN:
3280af22 1542 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1543 case OP_SASSIGN:
bf4b1e52
GS		 1544 case OP_ANDASSIGN:
1545 case OP_ORASSIGN:
8990e307 1546 case OP_AELEMFAST:
3280af22 1547 PL_modcount++;
8990e307
LW		 1548 break;
1549
748a9306
LW		 1550 case OP_PADAV:
1551 case OP_PADHV:
3280af22 1552 PL_modcount = 10000;
5196be3e
MB		 1553 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1554 return o; /* Treat \(@foo) like ordinary list. */
1555 if (scalar_mod_type(o, type))
3fe9a6f1 1556 goto nomod;
748a9306
LW		 1557 /* FALL THROUGH */
1558 case OP_PADSV:
3280af22 1559 PL_modcount++;
748a9306 1560 if (!type)
cea2e8a9 1561 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1562 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1563 break;
1564
554b3eca 1565#ifdef USE_THREADS
2faa37cc 1566 case OP_THREADSV:
533c011a 1567 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1568 break;
1569#endif /* USE_THREADS */
1570
748a9306
LW		 1571 case OP_PUSHMARK:
1572 break;
a0d0e21e 1573
69969c6f
SB		 1574 case OP_KEYS:
1575 if (type != OP_SASSIGN)
1576 goto nomod;
5d82c453
GA		 1577 goto lvalue_func;
1578 case OP_SUBSTR:
1579 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1580 goto nomod;
5f05dabc 1581 /* FALL THROUGH */
a0d0e21e 1582 case OP_POS:
463ee0b2 1583 case OP_VEC:
5d82c453 1584 lvalue_func:
11343788
MB		 1585 pad_free(o->op_targ);
1586 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1587 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1588 if (o->op_flags & OPf_KIDS)
1589 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1590 break;
a0d0e21e 1591
463ee0b2
LW		 1592 case OP_AELEM:
1593 case OP_HELEM:
11343788 1594 ref(cBINOPo->op_first, o->op_type);
68dc0745 1595 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1596 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1597 o->op_private |= OPpLVAL_DEFER;
3280af22 1598 PL_modcount++;
463ee0b2
LW		 1599 break;
1600
1601 case OP_SCOPE:
1602 case OP_LEAVE:
1603 case OP_ENTER:
11343788
MB		 1604 if (o->op_flags & OPf_KIDS)
1605 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1606 break;
1607
1608 case OP_NULL:
638bc118
GS		 1609 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1610 goto nomod;
1611 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1612 break;
11343788
MB		 1613 if (o->op_targ != OP_LIST) {
1614 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1615 break;
1616 }
1617 /* FALL THROUGH */
463ee0b2 1618 case OP_LIST:
11343788 1619 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1620 mod(kid, type);
1621 break;
1622 }
11343788 1623 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1624
1625 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1626 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1627 else if (!type) {
11343788
MB		 1628 o->op_private |= OPpLVAL_INTRO;
1629 o->op_flags &= ~OPf_SPECIAL;
3280af22 1630 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1631 }
a0d0e21e 1632 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1633 o->op_flags |= OPf_REF;
1634 return o;
463ee0b2
LW		 1635}
1636
864dbfa3 1637STATIC bool
cea2e8a9 1638S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1639{
1640 switch (type) {
1641 case OP_SASSIGN:
5196be3e 1642 if (o->op_type == OP_RV2GV)
3fe9a6f1 1643 return FALSE;
1644 /* FALL THROUGH */
1645 case OP_PREINC:
1646 case OP_PREDEC:
1647 case OP_POSTINC:
1648 case OP_POSTDEC:
1649 case OP_I_PREINC:
1650 case OP_I_PREDEC:
1651 case OP_I_POSTINC:
1652 case OP_I_POSTDEC:
1653 case OP_POW:
1654 case OP_MULTIPLY:
1655 case OP_DIVIDE:
1656 case OP_MODULO:
1657 case OP_REPEAT:
1658 case OP_ADD:
1659 case OP_SUBTRACT:
1660 case OP_I_MULTIPLY:
1661 case OP_I_DIVIDE:
1662 case OP_I_MODULO:
1663 case OP_I_ADD:
1664 case OP_I_SUBTRACT:
1665 case OP_LEFT_SHIFT:
1666 case OP_RIGHT_SHIFT:
1667 case OP_BIT_AND:
1668 case OP_BIT_XOR:
1669 case OP_BIT_OR:
1670 case OP_CONCAT:
1671 case OP_SUBST:
1672 case OP_TRANS:
49e9fbe6
GS		 1673 case OP_READ:
1674 case OP_SYSREAD:
1675 case OP_RECV:
bf4b1e52
GS		 1676 case OP_ANDASSIGN:
1677 case OP_ORASSIGN:
3fe9a6f1 1678 return TRUE;
1679 default:
1680 return FALSE;
1681 }
1682}
1683
35cd451c 1684STATIC bool
cea2e8a9 1685S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1686{
1687 switch (o->op_type) {
1688 case OP_PIPE_OP:
1689 case OP_SOCKPAIR:
1690 if (argnum == 2)
1691 return TRUE;
1692 /* FALL THROUGH */
1693 case OP_SYSOPEN:
1694 case OP_OPEN:
ded8aa31 1695 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1696 case OP_SOCKET:
1697 case OP_OPEN_DIR:
1698 case OP_ACCEPT:
1699 if (argnum == 1)
1700 return TRUE;
1701 /* FALL THROUGH */
1702 default:
1703 return FALSE;
1704 }
1705}
1706
463ee0b2 1707OP *
864dbfa3 1708Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1709{
1710 OP *kid;
11343788
MB		 1711 if (o && o->op_flags & OPf_KIDS) {
1712 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1713 ref(kid, type);
1714 }
11343788 1715 return o;
463ee0b2
LW		 1716}
1717
1718OP *
864dbfa3 1719Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1720{
1721 OP *kid;
463ee0b2 1722
3280af22 1723 if (!o || PL_error_count)
11343788 1724 return o;
463ee0b2 1725
11343788 1726 switch (o->op_type) {
a0d0e21e 1727 case OP_ENTERSUB:
afebc493 1728 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1729 !(o->op_flags & OPf_STACKED)) {
1730 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1731 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1732 assert(cUNOPo->op_first->op_type == OP_NULL);
1733 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1734 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1735 }
1736 break;
aeea060c 1737
463ee0b2 1738 case OP_COND_EXPR:
11343788 1739 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1740 ref(kid, type);
1741 break;
8990e307 1742 case OP_RV2SV:
35cd451c
GS		 1743 if (type == OP_DEFINED)
1744 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1745 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1746 /* FALL THROUGH */
1747 case OP_PADSV:
5f05dabc 1748 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1749 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1750 : type == OP_RV2HV ? OPpDEREF_HV
1751 : OPpDEREF_SV);
11343788 1752 o->op_flags |= OPf_MOD;
a0d0e21e 1753 }
8990e307 1754 break;
1c846c1f 1755
2faa37cc 1756 case OP_THREADSV:
a863c7d1
MB		 1757 o->op_flags |= OPf_MOD; /* XXX ??? */
1758 break;
1759
463ee0b2
LW		 1760 case OP_RV2AV:
1761 case OP_RV2HV:
aeea060c 1762 o->op_flags |= OPf_REF;
8990e307 1763 /* FALL THROUGH */
463ee0b2 1764 case OP_RV2GV:
35cd451c
GS		 1765 if (type == OP_DEFINED)
1766 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1767 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1768 break;
8990e307 1769
463ee0b2
LW		 1770 case OP_PADAV:
1771 case OP_PADHV:
aeea060c 1772 o->op_flags |= OPf_REF;
79072805 1773 break;
aeea060c 1774
8990e307 1775 case OP_SCALAR:
79072805 1776 case OP_NULL:
11343788 1777 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1778 break;
11343788 1779 ref(cBINOPo->op_first, type);
79072805
LW		 1780 break;
1781 case OP_AELEM:
1782 case OP_HELEM:
11343788 1783 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1784 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1785 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1786 : type == OP_RV2HV ? OPpDEREF_HV
1787 : OPpDEREF_SV);
11343788 1788 o->op_flags |= OPf_MOD;
8990e307 1789 }
79072805
LW		 1790 break;
1791
463ee0b2 1792 case OP_SCOPE:
79072805
LW		 1793 case OP_LEAVE:
1794 case OP_ENTER:
8990e307 1795 case OP_LIST:
11343788 1796 if (!(o->op_flags & OPf_KIDS))
79072805 1797 break;
11343788 1798 ref(cLISTOPo->op_last, type);
79072805 1799 break;
a0d0e21e
LW		 1800 default:
1801 break;
79072805 1802 }
11343788 1803 return scalar(o);
8990e307 1804
79072805
LW		 1805}
1806
09bef843
SB		 1807STATIC OP *
1808S_dup_attrlist(pTHX_ OP *o)
1809{
1810 OP *rop = Nullop;
1811
1812 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1813 * where the first kid is OP_PUSHMARK and the remaining ones
1814 * are OP_CONST. We need to push the OP_CONST values.
1815 */
1816 if (o->op_type == OP_CONST)
1817 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1818 else {
1819 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1820 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1821 if (o->op_type == OP_CONST)
1822 rop = append_elem(OP_LIST, rop,
1823 newSVOP(OP_CONST, o->op_flags,
1824 SvREFCNT_inc(cSVOPo->op_sv)));
1825 }
1826 }
1827 return rop;
1828}
1829
1830STATIC void
1831S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1832{
09bef843
SB		 1833 SV *stashsv;
1834
1835 /* fake up C<use attributes $pkg,$rv,@attrs> */
1836 ENTER; /* need to protect against side-effects of 'use' */
1837 SAVEINT(PL_expect);
1838 if (stash && HvNAME(stash))
1839 stashsv = newSVpv(HvNAME(stash), 0);
1840 else
1841 stashsv = &PL_sv_no;
e4783991 1842
09bef843 1843#define ATTRSMODULE "attributes"
e4783991
GS		 1844
1845 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1846 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1847 Nullsv,
1848 prepend_elem(OP_LIST,
1849 newSVOP(OP_CONST, 0, stashsv),
1850 prepend_elem(OP_LIST,
1851 newSVOP(OP_CONST, 0,
1852 newRV(target)),
1853 dup_attrlist(attrs))));
09bef843
SB		 1854 LEAVE;
1855}
1856
be3174d2
GS		 1857void
1858Perl_apply_attrs_string(pTHX_ char *stashpv, CV *cv,
1859 char *attrstr, STRLEN len)
1860{
1861 OP *attrs = Nullop;
1862
1863 if (!len) {
1864 len = strlen(attrstr);
1865 }
1866
1867 while (len) {
1868 for (; isSPACE(*attrstr) && len; --len, ++attrstr) ;
1869 if (len) {
1870 char *sstr = attrstr;
1871 for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ;
1872 attrs = append_elem(OP_LIST, attrs,
1873 newSVOP(OP_CONST, 0,
1874 newSVpvn(sstr, attrstr-sstr)));
1875 }
1876 }
1877
1878 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1879 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1880 Nullsv, prepend_elem(OP_LIST,
1881 newSVOP(OP_CONST, 0, newSVpv(stashpv,0)),
1882 prepend_elem(OP_LIST,
1883 newSVOP(OP_CONST, 0,
1884 newRV((SV*)cv)),
1885 attrs)));
1886}
1887
09bef843
SB		 1888STATIC OP *
1889S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1890{
1891 OP *kid;
93a17b20
LW		 1892 I32 type;
1893
3280af22 1894 if (!o || PL_error_count)
11343788 1895 return o;
93a17b20 1896
11343788 1897 type = o->op_type;
93a17b20 1898 if (type == OP_LIST) {
11343788 1899 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1900 my_kid(kid, attrs);
dab48698 1901 } else if (type == OP_UNDEF) {
7766148a 1902 return o;
77ca0c92
LW		 1903 } else if (type == OP_RV2SV || /* "our" declaration */
1904 type == OP_RV2AV ||
1905 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1906 o->op_private |= OPpOUR_INTRO;
77ca0c92 1907 return o;
dab48698 1908 } else if (type != OP_PADSV &&
93a17b20
LW		 1909 type != OP_PADAV &&
1910 type != OP_PADHV &&
1911 type != OP_PUSHMARK)
1912 {
eb64745e
GS		 1913 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1914 PL_op_desc[o->op_type],
1915 PL_in_my == KEY_our ? "our" : "my"));
11343788 1916 return o;
93a17b20 1917 }
09bef843
SB		 1918 else if (attrs && type != OP_PUSHMARK) {
1919 HV *stash;
1920 SV *padsv;
1921 SV **namesvp;
1922
eb64745e
GS		 1923 PL_in_my = FALSE;
1924 PL_in_my_stash = Nullhv;
1925
09bef843
SB		 1926 /* check for C<my Dog $spot> when deciding package */
1927 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1928 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1929 stash = SvSTASH(*namesvp);
1930 else
1931 stash = PL_curstash;
1932 padsv = PAD_SV(o->op_targ);
1933 apply_attrs(stash, padsv, attrs);
1934 }
11343788
MB		 1935 o->op_flags |= OPf_MOD;
1936 o->op_private |= OPpLVAL_INTRO;
1937 return o;
93a17b20
LW		 1938}
1939
1940OP *
09bef843
SB		 1941Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1942{
1943 if (o->op_flags & OPf_PARENS)
1944 list(o);
09bef843
SB		 1945 if (attrs)
1946 SAVEFREEOP(attrs);
eb64745e
GS		 1947 o = my_kid(o, attrs);
1948 PL_in_my = FALSE;
1949 PL_in_my_stash = Nullhv;
1950 return o;
09bef843
SB		 1951}
1952
1953OP *
1954Perl_my(pTHX_ OP *o)
1955{
1956 return my_kid(o, Nullop);
1957}
1958
1959OP *
864dbfa3 1960Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1961{
1962 if (o)
1963 o->op_flags |= OPf_PARENS;
1964 return o;
1965}
1966
1967OP *
864dbfa3 1968Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1969{
d008e5eb 1970 dTHR;
11343788 1971 OP *o;
79072805 1972
e476b1b5 1973 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1974 (left->op_type == OP_RV2AV ||
1975 left->op_type == OP_RV2HV ||
1976 left->op_type == OP_PADAV ||
1977 left->op_type == OP_PADHV)) {
22c35a8c 1978 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1979 right->op_type == OP_TRANS)
1980 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1981 const char *sample = ((left->op_type == OP_RV2AV ||
1982 left->op_type == OP_PADAV)
1983 ? "@array" : "%hash");
e476b1b5 1984 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 1985 "Applying %s to %s will act on scalar(%s)",
599cee73 1986 desc, sample, sample);
2ae324a7 1987 }
1988
de4bf5b3
MG		 1989 if (!(right->op_flags & OPf_STACKED) &&
1990 (right->op_type == OP_MATCH ||
79072805 1991 right->op_type == OP_SUBST ||
de4bf5b3 1992 right->op_type == OP_TRANS)) {
79072805 1993 right->op_flags |= OPf_STACKED;
d897a58d
MG		 1994 if (right->op_type != OP_MATCH &&
1995 ! (right->op_type == OP_TRANS &&
1996 right->op_private & OPpTRANS_IDENTICAL))
463ee0b2 1997 left = mod(left, right->op_type);
79072805 1998 if (right->op_type == OP_TRANS)
11343788 1999 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 2000 else
11343788 2001 o = prepend_elem(right->op_type, scalar(left), right);
79072805 2002 if (type == OP_NOT)
11343788
MB		 2003 return newUNOP(OP_NOT, 0, scalar(o));
2004 return o;
79072805
LW		 2005 }
2006 else
2007 return bind_match(type, left,
2008 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
2009}
2010
2011OP *
864dbfa3 2012Perl_invert(pTHX_ OP *o)
79072805 2013{
11343788
MB		 2014 if (!o)
2015 return o;
79072805 2016 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 2017 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 2018}
2019
2020OP *
864dbfa3 2021Perl_scope(pTHX_ OP *o)
79072805
LW		 2022{
2023 if (o) {
3280af22 2024 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 2025 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
2026 o->op_type = OP_LEAVE;
22c35a8c 2027 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2028 }
2029 else {
2030 if (o->op_type == OP_LINESEQ) {
2031 OP *kid;
2032 o->op_type = OP_SCOPE;
22c35a8c 2033 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2034 kid = ((LISTOP*)o)->op_first;
2035 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
2036 null(kid);
463ee0b2
LW		 2037 }
2038 else
748a9306 2039 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2040 }
79072805
LW		 2041 }
2042 return o;
2043}
2044
b3ac6de7 2045void
864dbfa3 2046Perl_save_hints(pTHX)
b3ac6de7 2047{
3280af22
NIS		 2048 SAVEI32(PL_hints);
2049 SAVESPTR(GvHV(PL_hintgv));
2050 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2051 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2052}
2053
a0d0e21e 2054int
864dbfa3 2055Perl_block_start(pTHX_ int full)
79072805 2056{
11343788 2057 dTHR;
3280af22 2058 int retval = PL_savestack_ix;
b3ac6de7 2059
3280af22 2060 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2061 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2062 if (full)
2063 PL_comppad_name_fill = PL_comppad_name_floor;
2064 if (PL_comppad_name_floor < 0)
2065 PL_comppad_name_floor = 0;
3280af22
NIS		 2066 SAVEI32(PL_min_intro_pending);
2067 SAVEI32(PL_max_intro_pending);
2068 PL_min_intro_pending = 0;
2069 SAVEI32(PL_comppad_name_fill);
2070 SAVEI32(PL_padix_floor);
2071 PL_padix_floor = PL_padix;
2072 PL_pad_reset_pending = FALSE;
b3ac6de7 2073 SAVEHINTS();
3280af22 2074 PL_hints &= ~HINT_BLOCK_SCOPE;
1c846c1f 2075 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2076 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2077 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2078 SAVEFREESV(PL_compiling.cop_warnings) ;
2079 }
ac27b0f5
NIS		 2080 SAVESPTR(PL_compiling.cop_io);
2081 if (! specialCopIO(PL_compiling.cop_io)) {
2082 PL_compiling.cop_io = newSVsv(PL_compiling.cop_io) ;
2083 SAVEFREESV(PL_compiling.cop_io) ;
2084 }
a0d0e21e
LW		 2085 return retval;
2086}
2087
2088OP*
864dbfa3 2089Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2090{
11343788 2091 dTHR;
3280af22 2092 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2093 OP* retval = scalarseq(seq);
a0d0e21e 2094 LEAVE_SCOPE(floor);
3280af22 2095 PL_pad_reset_pending = FALSE;
e24b16f9 2096 PL_compiling.op_private = PL_hints;
a0d0e21e 2097 if (needblockscope)
3280af22
NIS		 2098 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2099 pad_leavemy(PL_comppad_name_fill);
2100 PL_cop_seqmax++;
a0d0e21e
LW		 2101 return retval;
2102}
2103
76e3520e 2104STATIC OP *
cea2e8a9 2105S_newDEFSVOP(pTHX)
54b9620d
MB		 2106{
2107#ifdef USE_THREADS
2108 OP *o = newOP(OP_THREADSV, 0);
2109 o->op_targ = find_threadsv("_");
2110 return o;
2111#else
3280af22 2112 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2113#endif /* USE_THREADS */
2114}
2115
a0d0e21e 2116void
864dbfa3 2117Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2118{
11343788 2119 dTHR;
3280af22 2120 if (PL_in_eval) {
b295d113
TH		 2121 if (PL_eval_root)
2122 return;
faef0170
HS		 2123 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2124 ((PL_in_eval & EVAL_KEEPERR)
2125 ? OPf_SPECIAL : 0), o);
3280af22 2126 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2127 PL_eval_root->op_private |= OPpREFCOUNTED;
2128 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2129 PL_eval_root->op_next = 0;
2130 peep(PL_eval_start);
a0d0e21e
LW		 2131 }
2132 else {
5dc0d613 2133 if (!o)
a0d0e21e 2134 return;
3280af22
NIS		 2135 PL_main_root = scope(sawparens(scalarvoid(o)));
2136 PL_curcop = &PL_compiling;
2137 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2138 PL_main_root->op_private |= OPpREFCOUNTED;
2139 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2140 PL_main_root->op_next = 0;
2141 peep(PL_main_start);
2142 PL_compcv = 0;
3841441e 2143
4fdae800 2144 /* Register with debugger */
84902520 2145 if (PERLDB_INTER) {
864dbfa3 2146 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2147 if (cv) {
2148 dSP;
924508f0 2149 PUSHMARK(SP);
cc49e20b 2150 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2151 PUTBACK;
864dbfa3 2152 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2153 }
2154 }
79072805 2155 }
79072805
LW		 2156}
2157
2158OP *
864dbfa3 2159Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2160{
2161 if (o->op_flags & OPf_PARENS)
2162 list(o);
8990e307 2163 else {
d008e5eb 2164 dTHR;
599cee73 2165 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2166 char *s;
834a4ddd 2167 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2168 if (*s == ';' || *s == '=')
eb64745e
GS		 2169 Perl_warner(aTHX_ WARN_PARENTHESIS,
2170 "Parentheses missing around \"%s\" list",
2171 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2172 }
2173 }
93a17b20 2174 if (lex)
eb64745e 2175 o = my(o);
93a17b20 2176 else
eb64745e
GS		 2177 o = mod(o, OP_NULL); /* a bit kludgey */
2178 PL_in_my = FALSE;
2179 PL_in_my_stash = Nullhv;
2180 return o;
79072805
LW		 2181}
2182
2183OP *
864dbfa3 2184Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2185{
2186 if (o->op_type == OP_LIST) {
554b3eca
MB		 2187 OP *o2;
2188#ifdef USE_THREADS
2faa37cc 2189 o2 = newOP(OP_THREADSV, 0);
54b9620d 2190 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2191#else
2192 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2193#endif /* USE_THREADS */
2194 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2195 }
2196 return o;
2197}
2198
2199OP *
864dbfa3 2200Perl_fold_constants(pTHX_ register OP *o)
79072805 2201{
11343788 2202 dTHR;
79072805
LW		 2203 register OP *curop;
2204 I32 type = o->op_type;
748a9306 2205 SV *sv;
79072805 2206
22c35a8c 2207 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2208 scalar(o);
b162f9ea 2209 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2210 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2211
eac055e9
GS		 2212 /* integerize op, unless it happens to be C<-foo>.
2213 * XXX should pp_i_negate() do magic string negation instead? */
2214 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2215 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2216 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2217 {
22c35a8c 2218 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2219 }
85e6fe83 2220
22c35a8c 2221 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2222 goto nope;
2223
de939608 2224 switch (type) {
7a52d87a
GS		 2225 case OP_NEGATE:
2226 /* XXX might want a ck_negate() for this */
2227 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2228 break;
de939608
CS		 2229 case OP_SPRINTF:
2230 case OP_UCFIRST:
2231 case OP_LCFIRST:
2232 case OP_UC:
2233 case OP_LC:
69dcf70c
MB		 2234 case OP_SLT:
2235 case OP_SGT:
2236 case OP_SLE:
2237 case OP_SGE:
2238 case OP_SCMP:
2239
de939608
CS		 2240 if (o->op_private & OPpLOCALE)
2241 goto nope;
2242 }
2243
3280af22 2244 if (PL_error_count)
a0d0e21e
LW		 2245 goto nope; /* Don't try to run w/ errors */
2246
79072805 2247 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2248 if ((curop->op_type != OP_CONST ||
2249 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2250 curop->op_type != OP_LIST &&
2251 curop->op_type != OP_SCALAR &&
2252 curop->op_type != OP_NULL &&
2253 curop->op_type != OP_PUSHMARK)
2254 {
79072805
LW		 2255 goto nope;
2256 }
2257 }
2258
2259 curop = LINKLIST(o);
2260 o->op_next = 0;
533c011a 2261 PL_op = curop;
cea2e8a9 2262 CALLRUNOPS(aTHX);
3280af22 2263 sv = *(PL_stack_sp--);
748a9306 2264 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2265 pad_swipe(o->op_targ);
748a9306
LW		 2266 else if (SvTEMP(sv)) { /* grab mortal temp? */
2267 (void)SvREFCNT_inc(sv);
2268 SvTEMP_off(sv);
85e6fe83 2269 }
79072805
LW		 2270 op_free(o);
2271 if (type == OP_RV2GV)
b1cb66bf 2272 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2273 else {
ee580363
GS		 2274 /* try to smush double to int, but don't smush -2.0 to -2 */
2275 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2276 type != OP_NEGATE)
2277 {
748a9306 2278 IV iv = SvIV(sv);
65202027 2279 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2280 SvREFCNT_dec(sv);
2281 sv = newSViv(iv);
2282 }
b1cb66bf 2283 else
2284 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2285 }
2286 return newSVOP(OP_CONST, 0, sv);
2287 }
aeea060c 2288
79072805 2289 nope:
22c35a8c 2290 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2291 return o;
79072805 2292
3280af22 2293 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2294 if (type == OP_MODULO
2295 || type == OP_DIVIDE
2296 || !(o->op_flags & OPf_KIDS))
2297 {
85e6fe83 2298 return o;
4bb9f687 2299 }
85e6fe83
LW		 2300
2301 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2302 if (curop->op_type == OP_CONST) {
b1cb66bf 2303 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2304 continue;
2305 return o;
2306 }
22c35a8c 2307 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2308 continue;
2309 return o;
2310 }
22c35a8c 2311 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2312 }
2313
79072805
LW		 2314 return o;
2315}
2316
2317OP *
864dbfa3 2318Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2319{
11343788 2320 dTHR;
79072805 2321 register OP *curop;
3280af22 2322 I32 oldtmps_floor = PL_tmps_floor;
79072805 2323
a0d0e21e 2324 list(o);
3280af22 2325 if (PL_error_count)
a0d0e21e
LW		 2326 return o; /* Don't attempt to run with errors */
2327
533c011a 2328 PL_op = curop = LINKLIST(o);
a0d0e21e 2329 o->op_next = 0;
7d4045d4 2330 peep(curop);
cea2e8a9
GS		 2331 pp_pushmark();
2332 CALLRUNOPS(aTHX);
533c011a 2333 PL_op = curop;
cea2e8a9 2334 pp_anonlist();
3280af22 2335 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2336
2337 o->op_type = OP_RV2AV;
22c35a8c 2338 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2339 curop = ((UNOP*)o)->op_first;
3280af22 2340 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2341 op_free(curop);
79072805
LW		 2342 linklist(o);
2343 return list(o);
2344}
2345
2346OP *
864dbfa3 2347Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2348{
2349 OP *kid;
a0d0e21e 2350 OP *last = 0;
79072805 2351
11343788
MB		 2352 if (!o || o->op_type != OP_LIST)
2353 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2354 else
5dc0d613 2355 o->op_flags &= ~OPf_WANT;
79072805 2356
22c35a8c 2357 if (!(PL_opargs[type] & OA_MARK))
11343788 2358 null(cLISTOPo->op_first);
8990e307 2359
11343788 2360 o->op_type = type;
22c35a8c 2361 o->op_ppaddr = PL_ppaddr[type];
11343788 2362 o->op_flags |= flags;
79072805 2363
11343788
MB		 2364 o = CHECKOP(type, o);
2365 if (o->op_type != type)
2366 return o;
79072805 2367
11343788 2368 if (cLISTOPo->op_children < 7) {
79072805 2369 /* XXX do we really need to do this if we're done appending?? */
11343788 2370 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2371 last = kid;
11343788 2372 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2373 }
2374
11343788 2375 return fold_constants(o);
79072805
LW		 2376}
2377
2378/* List constructors */
2379
2380OP *
864dbfa3 2381Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2382{
2383 if (!first)
2384 return last;
8990e307
LW		 2385
2386 if (!last)
79072805 2387 return first;
8990e307 2388
155aba94
GS		 2389 if (first->op_type != type
2390 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2391 {
2392 return newLISTOP(type, 0, first, last);
2393 }
79072805 2394
a0d0e21e
LW		 2395 if (first->op_flags & OPf_KIDS)
2396 ((LISTOP*)first)->op_last->op_sibling = last;
2397 else {
2398 first->op_flags |= OPf_KIDS;
2399 ((LISTOP*)first)->op_first = last;
2400 }
2401 ((LISTOP*)first)->op_last = last;
2402 ((LISTOP*)first)->op_children++;
2403 return first;
79072805
LW		 2404}
2405
2406OP *
864dbfa3 2407Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2408{
2409 if (!first)
2410 return (OP*)last;
8990e307
LW		 2411
2412 if (!last)
79072805 2413 return (OP*)first;
8990e307
LW		 2414
2415 if (first->op_type != type)
79072805 2416 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2417
2418 if (last->op_type != type)
79072805
LW		 2419 return append_elem(type, (OP*)first, (OP*)last);
2420
2421 first->op_last->op_sibling = last->op_first;
2422 first->op_last = last->op_last;
2423 first->op_children += last->op_children;
2424 if (first->op_children)
acb74605 2425 first->op_flags |= OPf_KIDS;
1c846c1f 2426
b7dc083c
NIS		 2427#ifdef PL_OP_SLAB_ALLOC
2428#else
1c846c1f 2429 Safefree(last);
b7dc083c 2430#endif
79072805
LW		 2431 return (OP*)first;
2432}
2433
2434OP *
864dbfa3 2435Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2436{
2437 if (!first)
2438 return last;
8990e307
LW		 2439
2440 if (!last)
79072805 2441 return first;
8990e307
LW		 2442
2443 if (last->op_type == type) {
2444 if (type == OP_LIST) { /* already a PUSHMARK there */
2445 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2446 ((LISTOP*)last)->op_first->op_sibling = first;
2447 }
2448 else {
2449 if (!(last->op_flags & OPf_KIDS)) {
2450 ((LISTOP*)last)->op_last = first;
2451 last->op_flags |= OPf_KIDS;
2452 }
2453 first->op_sibling = ((LISTOP*)last)->op_first;
2454 ((LISTOP*)last)->op_first = first;
79072805 2455 }
79072805
LW		 2456 ((LISTOP*)last)->op_children++;
2457 return last;
2458 }
2459
2460 return newLISTOP(type, 0, first, last);
2461}
2462
2463/* Constructors */
2464
2465OP *
864dbfa3 2466Perl_newNULLLIST(pTHX)
79072805 2467{
8990e307
LW		 2468 return newOP(OP_STUB, 0);
2469}
2470
2471OP *
864dbfa3 2472Perl_force_list(pTHX_ OP *o)
8990e307 2473{
11343788
MB		 2474 if (!o || o->op_type != OP_LIST)
2475 o = newLISTOP(OP_LIST, 0, o, Nullop);
2476 null(o);
2477 return o;
79072805
LW		 2478}
2479
2480OP *
864dbfa3 2481Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2482{
2483 LISTOP *listop;
2484
b7dc083c 2485 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2486
2487 listop->op_type = type;
22c35a8c 2488 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2489 listop->op_children = (first != 0) + (last != 0);
2490 listop->op_flags = flags;
79072805
LW		 2491
2492 if (!last && first)
2493 last = first;
2494 else if (!first && last)
2495 first = last;
8990e307
LW		 2496 else if (first)
2497 first->op_sibling = last;
79072805
LW		 2498 listop->op_first = first;
2499 listop->op_last = last;
8990e307
LW		 2500 if (type == OP_LIST) {
2501 OP* pushop;
2502 pushop = newOP(OP_PUSHMARK, 0);
2503 pushop->op_sibling = first;
2504 listop->op_first = pushop;
2505 listop->op_flags |= OPf_KIDS;
2506 if (!last)
2507 listop->op_last = pushop;
2508 }
2509 else if (listop->op_children)
2510 listop->op_flags |= OPf_KIDS;
79072805
LW		 2511
2512 return (OP*)listop;
2513}
2514
2515OP *
864dbfa3 2516Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2517{
11343788 2518 OP *o;
b7dc083c 2519 NewOp(1101, o, 1, OP);
11343788 2520 o->op_type = type;
22c35a8c 2521 o->op_ppaddr = PL_ppaddr[type];
11343788 2522 o->op_flags = flags;
79072805 2523
11343788
MB		 2524 o->op_next = o;
2525 o->op_private = 0 + (flags >> 8);
22c35a8c 2526 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2527 scalar(o);
22c35a8c 2528 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2529 o->op_targ = pad_alloc(type, SVs_PADTMP);
2530 return CHECKOP(type, o);
79072805
LW		 2531}
2532
2533OP *
864dbfa3 2534Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2535{
2536 UNOP *unop;
2537
93a17b20 2538 if (!first)
aeea060c 2539 first = newOP(OP_STUB, 0);
22c35a8c 2540 if (PL_opargs[type] & OA_MARK)
8990e307 2541 first = force_list(first);
93a17b20 2542
b7dc083c 2543 NewOp(1101, unop, 1, UNOP);
79072805 2544 unop->op_type = type;
22c35a8c 2545 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2546 unop->op_first = first;
2547 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2548 unop->op_private = 1 | (flags >> 8);
e50aee73 2549 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2550 if (unop->op_next)
2551 return (OP*)unop;
2552
a0d0e21e 2553 return fold_constants((OP *) unop);
79072805
LW		 2554}
2555
2556OP *
864dbfa3 2557Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2558{
2559 BINOP *binop;
b7dc083c 2560 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2561
2562 if (!first)
2563 first = newOP(OP_NULL, 0);
2564
2565 binop->op_type = type;
22c35a8c 2566 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2567 binop->op_first = first;
2568 binop->op_flags = flags | OPf_KIDS;
2569 if (!last) {
2570 last = first;
c07a80fd 2571 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2572 }
2573 else {
c07a80fd 2574 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2575 first->op_sibling = last;
2576 }
2577
e50aee73 2578 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2579 if (binop->op_next || binop->op_type != type)
79072805
LW		 2580 return (OP*)binop;
2581
7284ab6f 2582 binop->op_last = binop->op_first->op_sibling;
79072805 2583
a0d0e21e 2584 return fold_constants((OP *)binop);
79072805
LW		 2585}
2586
a0ed51b3
LW		 2587static int
2588utf8compare(const void *a, const void *b)
2589{
2590 int i;
2591 for (i = 0; i < 10; i++) {
2592 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2593 return -1;
2594 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2595 return 1;
2596 }
2597 return 0;
2598}
2599
79072805 2600OP *
864dbfa3 2601Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2602{
79072805
LW		 2603 SV *tstr = ((SVOP*)expr)->op_sv;
2604 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2605 STRLEN tlen;
2606 STRLEN rlen;
ec49126f 2607 register U8 *t = (U8*)SvPV(tstr, tlen);
2608 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2609 register I32 i;
2610 register I32 j;
a0ed51b3 2611 I32 del;
79072805 2612 I32 complement;
5d06d08e 2613 I32 squash;
79072805
LW		 2614 register short *tbl;
2615
11343788 2616 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2617 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2618 squash = o->op_private & OPpTRANS_SQUASH;
1c846c1f 2619
036b4402
GS		 2620 if (SvUTF8(tstr))
2621 o->op_private |= OPpTRANS_FROM_UTF;
1c846c1f
NIS		 2622
2623 if (SvUTF8(rstr))
036b4402 2624 o->op_private |= OPpTRANS_TO_UTF;
79072805 2625
a0ed51b3 2626 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2627 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2628 SV* transv = 0;
2629 U8* tend = t + tlen;
2630 U8* rend = r + rlen;
ba210ebe 2631 STRLEN ulen;
a0ed51b3
LW		 2632 U32 tfirst = 1;
2633 U32 tlast = 0;
2634 I32 tdiff;
2635 U32 rfirst = 1;
2636 U32 rlast = 0;
2637 I32 rdiff;
2638 I32 diff;
2639 I32 none = 0;
2640 U32 max = 0;
2641 I32 bits;
2642 I32 grows = 0;
2643 I32 havefinal = 0;
2644 U32 final;
a0ed51b3
LW		 2645 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2646 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2647
2648 if (complement) {
806e7201 2649 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3 2650 U8** cp;
ba210ebe 2651 I32* cl;
a0ed51b3
LW		 2652 UV nextmin = 0;
2653 New(1109, cp, tlen, U8*);
2654 i = 0;
79cb57f6 2655 transv = newSVpvn("",0);
a0ed51b3
LW		 2656 while (t < tend) {
2657 cp[i++] = t;
2658 t += UTF8SKIP(t);
2659 if (*t == 0xff) {
2660 t++;
2661 t += UTF8SKIP(t);
2662 }
2663 }
2664 qsort(cp, i, sizeof(U8*), utf8compare);
2665 for (j = 0; j < i; j++) {
2666 U8 *s = cp[j];
ba210ebe 2667 I32 cur = j < i ? cp[j+1] - s : tend - s;
dcad2880 2668 UV val = utf8_to_uv(s, cur, &ulen, 0);
a0ed51b3
LW		 2669 s += ulen;
2670 diff = val - nextmin;
2671 if (diff > 0) {
2672 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2673 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2674 if (diff > 1) {
2675 t = uv_to_utf8(tmpbuf, val - 1);
2676 sv_catpvn(transv, "\377", 1);
dfe13c55 2677 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2678 }
2679 }
2680 if (*s == 0xff)
dcad2880 2681 val = utf8_to_uv(s+1, cur - 1, &ulen, 0);
a0ed51b3
LW		 2682 if (val >= nextmin)
2683 nextmin = val + 1;
2684 }
2685 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2686 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2687 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2688 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2689 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2690 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2691 tlen = SvCUR(transv);
2692 tend = t + tlen;
2693 }
2694 else if (!rlen && !del) {
2695 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2696 }
2697 if (!squash) {
12ae5dfc
JH		 2698 if (t == r ||
2699 (tlen == rlen && memEQ((char *)t, (char *)r, tlen)))
01ec43d0 2700 {
4757a243 2701 o->op_private |= OPpTRANS_IDENTICAL;
01ec43d0 2702 }
a0ed51b3
LW		 2703 }
2704
2705 while (t < tend || tfirst <= tlast) {
2706 /* see if we need more "t" chars */
2707 if (tfirst > tlast) {
dcad2880 2708 tfirst = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2709 t += ulen;
2710 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2711 t++;
dcad2880 2712 tlast = (I32)utf8_to_uv(t, tend - t, &ulen, 0);
a0ed51b3
LW		 2713 t += ulen;
2714 }
2715 else
2716 tlast = tfirst;
2717 }
2718
2719 /* now see if we need more "r" chars */
2720 if (rfirst > rlast) {
2721 if (r < rend) {
dcad2880 2722 rfirst = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2723 r += ulen;
2724 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
ba210ebe 2725 r++;
dcad2880 2726 rlast = (I32)utf8_to_uv(r, rend - r, &ulen, 0);
a0ed51b3
LW		 2727 r += ulen;
2728 }
2729 else
2730 rlast = rfirst;
2731 }
2732 else {
2733 if (!havefinal++)
2734 final = rlast;
2735 rfirst = rlast = 0xffffffff;
2736 }
2737 }
2738
2739 /* now see which range will peter our first, if either. */
2740 tdiff = tlast - tfirst;
2741 rdiff = rlast - rfirst;
2742
2743 if (tdiff <= rdiff)
2744 diff = tdiff;
2745 else
2746 diff = rdiff;
2747
2748 if (rfirst == 0xffffffff) {
2749 diff = tdiff; /* oops, pretend rdiff is infinite */
2750 if (diff > 0)
894356b3
GS		 2751 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2752 (long)tfirst, (long)tlast);
a0ed51b3 2753 else
894356b3 2754 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2755 }
2756 else {
2757 if (diff > 0)
894356b3
GS		 2758 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2759 (long)tfirst, (long)(tfirst + diff),
2760 (long)rfirst);
a0ed51b3 2761 else
894356b3
GS		 2762 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2763 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2764
2765 if (rfirst + diff > max)
2766 max = rfirst + diff;
2767 rfirst += diff + 1;
2768 if (!grows) {
2769 if (rfirst <= 0x80)
2770 ;
2771 else if (rfirst <= 0x800)
2772 grows |= (tfirst < 0x80);
2773 else if (rfirst <= 0x10000)
2774 grows |= (tfirst < 0x800);
2775 else if (rfirst <= 0x200000)
2776 grows |= (tfirst < 0x10000);
2777 else if (rfirst <= 0x4000000)
2778 grows |= (tfirst < 0x200000);
2779 else if (rfirst <= 0x80000000)
2780 grows |= (tfirst < 0x4000000);
2781 }
2782 }
2783 tfirst += diff + 1;
2784 }
2785
2786 none = ++max;
2787 if (del)
2788 del = ++max;
2789
2790 if (max > 0xffff)
2791 bits = 32;
2792 else if (max > 0xff)
2793 bits = 16;
2794 else
2795 bits = 8;
2796
2797 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2798 SvREFCNT_dec(listsv);
2799 if (transv)
2800 SvREFCNT_dec(transv);
2801
2802 if (!del && havefinal)
b448e4fe
JH		 2803 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2804 newSVuv((UV)final), 0);
a0ed51b3
LW		 2805
2806 if (grows && to_utf)
2807 o->op_private |= OPpTRANS_GROWS;
2808
2809 op_free(expr);
2810 op_free(repl);
2811 return o;
2812 }
2813
2814 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2815 if (complement) {
2816 Zero(tbl, 256, short);
2817 for (i = 0; i < tlen; i++)
ec49126f 2818 tbl[t[i]] = -1;
79072805
LW		 2819 for (i = 0, j = 0; i < 256; i++) {
2820 if (!tbl[i]) {
2821 if (j >= rlen) {
a0ed51b3 2822 if (del)
79072805
LW		 2823 tbl[i] = -2;
2824 else if (rlen)
ec49126f 2825 tbl[i] = r[j-1];
79072805
LW		 2826 else
2827 tbl[i] = i;
2828 }
2829 else
ec49126f 2830 tbl[i] = r[j++];
79072805
LW		 2831 }
2832 }
2833 }
2834 else {
a0ed51b3 2835 if (!rlen && !del) {
79072805 2836 r = t; rlen = tlen;
5d06d08e 2837 if (!squash)
4757a243 2838 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2839 }
2840 for (i = 0; i < 256; i++)
2841 tbl[i] = -1;
2842 for (i = 0, j = 0; i < tlen; i++,j++) {
2843 if (j >= rlen) {
a0ed51b3 2844 if (del) {
ec49126f 2845 if (tbl[t[i]] == -1)
2846 tbl[t[i]] = -2;
79072805
LW		 2847 continue;
2848 }
2849 --j;
2850 }
ec49126f 2851 if (tbl[t[i]] == -1)
2852 tbl[t[i]] = r[j];
79072805
LW		 2853 }
2854 }
2855 op_free(expr);
2856 op_free(repl);
2857
11343788 2858 return o;
79072805
LW		 2859}
2860
2861OP *
864dbfa3 2862Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2863{
11343788 2864 dTHR;
79072805
LW		 2865 PMOP *pmop;
2866
b7dc083c 2867 NewOp(1101, pmop, 1, PMOP);
79072805 2868 pmop->op_type = type;
22c35a8c 2869 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2870 pmop->op_flags = flags;
c07a80fd 2871 pmop->op_private = 0 | (flags >> 8);
79072805 2872
3280af22 2873 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2874 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2875 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2876 pmop->op_pmpermflags |= PMf_LOCALE;
2877 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2878
79072805 2879 /* link into pm list */
3280af22
NIS		 2880 if (type != OP_TRANS && PL_curstash) {
2881 pmop->op_pmnext = HvPMROOT(PL_curstash);
2882 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2883 }
2884
2885 return (OP*)pmop;
2886}
2887
2888OP *
864dbfa3 2889Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2890{
5c0ca799 2891 dTHR;
79072805
LW		 2892 PMOP *pm;
2893 LOGOP *rcop;
ce862d02 2894 I32 repl_has_vars = 0;
79072805 2895
11343788
MB		 2896 if (o->op_type == OP_TRANS)
2897 return pmtrans(o, expr, repl);
79072805 2898
3280af22 2899 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2900 pm = (PMOP*)o;
79072805
LW		 2901
2902 if (expr->op_type == OP_CONST) {
463ee0b2 2903 STRLEN plen;
79072805 2904 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2905 char *p = SvPV(pat, plen);
11343788 2906 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2907 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2908 p = SvPV(pat, plen);
79072805
LW		 2909 pm->op_pmflags |= PMf_SKIPWHITE;
2910 }
393fec97 2911 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2912 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2913 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2914 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2915 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2916 op_free(expr);
2917 }
2918 else {
393fec97
GS		 2919 if (PL_hints & HINT_UTF8)
2920 pm->op_pmdynflags |= PMdf_UTF8;
3280af22 2921 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
1c846c1f 2922 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2923 ? OP_REGCRESET
2924 : OP_REGCMAYBE),0,expr);
463ee0b2 2925
b7dc083c 2926 NewOp(1101, rcop, 1, LOGOP);
79072805 2927 rcop->op_type = OP_REGCOMP;
22c35a8c 2928 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2929 rcop->op_first = scalar(expr);
1c846c1f 2930 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2931 ? (OPf_SPECIAL | OPf_KIDS)
2932 : OPf_KIDS);
79072805 2933 rcop->op_private = 1;
11343788 2934 rcop->op_other = o;
79072805
LW		 2935
2936 /* establish postfix order */
3280af22 2937 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2938 LINKLIST(expr);
2939 rcop->op_next = expr;
2940 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2941 }
2942 else {
2943 rcop->op_next = LINKLIST(expr);
2944 expr->op_next = (OP*)rcop;
2945 }
79072805 2946
11343788 2947 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2948 }
2949
2950 if (repl) {
748a9306 2951 OP *curop;
0244c3a4 2952 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2953 curop = 0;
57843af0
GS		 2954 if (CopLINE(PL_curcop) < PL_multi_end)
2955 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2956 }
554b3eca 2957#ifdef USE_THREADS
2faa37cc 2958 else if (repl->op_type == OP_THREADSV
554b3eca 2959 && strchr("&`'123456789+",
533c011a 2960 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2961 {
2962 curop = 0;
2963 }
2964#endif /* USE_THREADS */
748a9306
LW		 2965 else if (repl->op_type == OP_CONST)
2966 curop = repl;
79072805 2967 else {
79072805
LW		 2968 OP *lastop = 0;
2969 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2970 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2971#ifdef USE_THREADS
ce862d02
IZ		 2972 if (curop->op_type == OP_THREADSV) {
2973 repl_has_vars = 1;
be949f6f 2974 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2975 break;
554b3eca
MB		 2976 }
2977#else
79072805 2978 if (curop->op_type == OP_GV) {
638eceb6 2979 GV *gv = cGVOPx_gv(curop);
ce862d02 2980 repl_has_vars = 1;
93a17b20 2981 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2982 break;
2983 }
554b3eca 2984#endif /* USE_THREADS */
79072805
LW		 2985 else if (curop->op_type == OP_RV2CV)
2986 break;
2987 else if (curop->op_type == OP_RV2SV ||
2988 curop->op_type == OP_RV2AV ||
2989 curop->op_type == OP_RV2HV ||
2990 curop->op_type == OP_RV2GV) {
2991 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2992 break;
2993 }
748a9306
LW		 2994 else if (curop->op_type == OP_PADSV ||
2995 curop->op_type == OP_PADAV ||
2996 curop->op_type == OP_PADHV ||
554b3eca 2997 curop->op_type == OP_PADANY) {
ce862d02 2998 repl_has_vars = 1;
748a9306 2999 }
1167e5da
SM		 3000 else if (curop->op_type == OP_PUSHRE)
3001 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 3002 else
3003 break;
3004 }
3005 lastop = curop;
3006 }
748a9306 3007 }
ce862d02 3008 if (curop == repl
1c846c1f
NIS		 3009 && !(repl_has_vars
3010 && (!pm->op_pmregexp
ce862d02 3011 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 3012 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 3013 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 3014 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 3015 }
3016 else {
ce862d02
IZ		 3017 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
3018 pm->op_pmflags |= PMf_MAYBE_CONST;
3019 pm->op_pmpermflags |= PMf_MAYBE_CONST;
3020 }
b7dc083c 3021 NewOp(1101, rcop, 1, LOGOP);
748a9306 3022 rcop->op_type = OP_SUBSTCONT;
22c35a8c 3023 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 3024 rcop->op_first = scalar(repl);
3025 rcop->op_flags |= OPf_KIDS;
3026 rcop->op_private = 1;
11343788 3027 rcop->op_other = o;
748a9306
LW		 3028
3029 /* establish postfix order */
3030 rcop->op_next = LINKLIST(repl);
3031 repl->op_next = (OP*)rcop;
3032
3033 pm->op_pmreplroot = scalar((OP*)rcop);
3034 pm->op_pmreplstart = LINKLIST(rcop);
3035 rcop->op_next = 0;
79072805
LW		 3036 }
3037 }
3038
3039 return (OP*)pm;
3040}
3041
3042OP *
864dbfa3 3043Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3044{
3045 SVOP *svop;
b7dc083c 3046 NewOp(1101, svop, 1, SVOP);
79072805 3047 svop->op_type = type;
22c35a8c 3048 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3049 svop->op_sv = sv;
3050 svop->op_next = (OP*)svop;
3051 svop->op_flags = flags;
22c35a8c 3052 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3053 scalar((OP*)svop);
22c35a8c 3054 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3055 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3056 return CHECKOP(type, svop);
79072805
LW		 3057}
3058
3059OP *
350de78d
GS		 3060Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3061{
3062 PADOP *padop;
3063 NewOp(1101, padop, 1, PADOP);
3064 padop->op_type = type;
3065 padop->op_ppaddr = PL_ppaddr[type];
3066 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3067 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3068 PL_curpad[padop->op_padix] = sv;
7766f137 3069 SvPADTMP_on(sv);
350de78d
GS		 3070 padop->op_next = (OP*)padop;
3071 padop->op_flags = flags;
3072 if (PL_opargs[type] & OA_RETSCALAR)
3073 scalar((OP*)padop);
3074 if (PL_opargs[type] & OA_TARGET)
3075 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3076 return CHECKOP(type, padop);
3077}
3078
3079OP *
864dbfa3 3080Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3081{
11343788 3082 dTHR;
350de78d 3083#ifdef USE_ITHREADS
743e66e6 3084 GvIN_PAD_on(gv);
350de78d
GS		 3085 return newPADOP(type, flags, SvREFCNT_inc(gv));
3086#else
7934575e 3087 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3088#endif
79072805
LW		 3089}
3090
3091OP *
864dbfa3 3092Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3093{
3094 PVOP *pvop;
b7dc083c 3095 NewOp(1101, pvop, 1, PVOP);
79072805 3096 pvop->op_type = type;
22c35a8c 3097 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3098 pvop->op_pv = pv;
3099 pvop->op_next = (OP*)pvop;
3100 pvop->op_flags = flags;
22c35a8c 3101 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3102 scalar((OP*)pvop);
22c35a8c 3103 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3104 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3105 return CHECKOP(type, pvop);
79072805
LW		 3106}
3107
79072805 3108void
864dbfa3 3109Perl_package(pTHX_ OP *o)
79072805 3110{
11343788 3111 dTHR;
93a17b20 3112 SV *sv;
79072805 3113
3280af22
NIS		 3114 save_hptr(&PL_curstash);
3115 save_item(PL_curstname);
11343788 3116 if (o) {
463ee0b2
LW		 3117 STRLEN len;
3118 char *name;
11343788 3119 sv = cSVOPo->op_sv;
463ee0b2 3120 name = SvPV(sv, len);
3280af22
NIS		 3121 PL_curstash = gv_stashpvn(name,len,TRUE);
3122 sv_setpvn(PL_curstname, name, len);
11343788 3123 op_free(o);
93a17b20
LW		 3124 }
3125 else {
3280af22
NIS		 3126 sv_setpv(PL_curstname,"<none>");
3127 PL_curstash = Nullhv;
93a17b20 3128 }
7ad382f4 3129 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3130 PL_copline = NOLINE;
3131 PL_expect = XSTATE;
79072805
LW		 3132}
3133
85e6fe83 3134void
864dbfa3 3135Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3136{
a0d0e21e 3137 OP *pack;
a0d0e21e
LW		 3138 OP *rqop;
3139 OP *imop;
b1cb66bf 3140 OP *veop;
78ca652e 3141 GV *gv;
85e6fe83 3142
a0d0e21e 3143 if (id->op_type != OP_CONST)
cea2e8a9 3144 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3145
b1cb66bf 3146 veop = Nullop;
3147
0f79a09d 3148 if (version != Nullop) {
b1cb66bf 3149 SV *vesv = ((SVOP*)version)->op_sv;
3150
44dcb63b 3151 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3152 arg = version;
3153 }
3154 else {
3155 OP *pack;
0f79a09d 3156 SV *meth;
b1cb66bf 3157
44dcb63b 3158 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3159 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3160
3161 /* Make copy of id so we don't free it twice */
3162 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3163
3164 /* Fake up a method call to VERSION */
0f79a09d
GS		 3165 meth = newSVpvn("VERSION",7);
3166 sv_upgrade(meth, SVt_PVIV);
155aba94 3167 (void)SvIOK_on(meth);
0f79a09d 3168 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3169 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3170 append_elem(OP_LIST,
0f79a09d
GS		 3171 prepend_elem(OP_LIST, pack, list(version)),
3172 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3173 }
3174 }
aeea060c 3175
a0d0e21e 3176 /* Fake up an import/unimport */
4633a7c4
LW		 3177 if (arg && arg->op_type == OP_STUB)
3178 imop = arg; /* no import on explicit () */
44dcb63b 3179 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3180 imop = Nullop; /* use 5.0; */
3181 }
4633a7c4 3182 else {
0f79a09d
GS		 3183 SV *meth;
3184
4633a7c4
LW		 3185 /* Make copy of id so we don't free it twice */
3186 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3187
3188 /* Fake up a method call to import/unimport */
3189 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3190 sv_upgrade(meth, SVt_PVIV);
155aba94 3191 (void)SvIOK_on(meth);
0f79a09d 3192 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3193 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3194 append_elem(OP_LIST,
3195 prepend_elem(OP_LIST, pack, list(arg)),
3196 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3197 }
3198
78ca652e
GS		 3199 /* Fake up a require, handle override, if any */
3200 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3201 if (!(gv && GvIMPORTED_CV(gv)))
3202 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3203
3204 if (gv && GvIMPORTED_CV(gv)) {
3205 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3206 append_elem(OP_LIST, id,
3207 scalar(newUNOP(OP_RV2CV, 0,
3208 newGVOP(OP_GV, 0,
3209 gv))))));
3210 }
3211 else {
3212 rqop = newUNOP(OP_REQUIRE, 0, id);
3213 }
a0d0e21e
LW		 3214
3215 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3216 newATTRSUB(floor,
79cb57f6 3217 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3218 Nullop,
09bef843 3219 Nullop,
a0d0e21e 3220 append_elem(OP_LINESEQ,
b1cb66bf 3221 append_elem(OP_LINESEQ,
3222 newSTATEOP(0, Nullch, rqop),
3223 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3224 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3225
c305c6a0 3226 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3227 PL_copline = NOLINE;
3228 PL_expect = XSTATE;
85e6fe83
LW		 3229}
3230
e4783991
GS		 3231void
3232Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3233{
3234 va_list args;
3235 va_start(args, ver);
3236 vload_module(flags, name, ver, &args);
3237 va_end(args);
3238}
3239
3240#ifdef PERL_IMPLICIT_CONTEXT
3241void
3242Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3243{
3244 dTHX;
3245 va_list args;
3246 va_start(args, ver);
3247 vload_module(flags, name, ver, &args);
3248 va_end(args);
3249}
3250#endif
3251
3252void
3253Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3254{
3255 OP *modname, *veop, *imop;
3256
3257 modname = newSVOP(OP_CONST, 0, name);
3258 modname->op_private |= OPpCONST_BARE;
3259 if (ver) {
3260 veop = newSVOP(OP_CONST, 0, ver);
3261 }
3262 else
3263 veop = Nullop;
3264 if (flags & PERL_LOADMOD_NOIMPORT) {
3265 imop = sawparens(newNULLLIST());
3266 }
3267 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3268 imop = va_arg(*args, OP*);
3269 }
3270 else {
3271 SV *sv;
3272 imop = Nullop;
3273 sv = va_arg(*args, SV*);
3274 while (sv) {
3275 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3276 sv = va_arg(*args, SV*);
3277 }
3278 }
81885997
GS		 3279 {
3280 line_t ocopline = PL_copline;
3281 int oexpect = PL_expect;
3282
3283 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3284 veop, modname, imop);
3285 PL_expect = oexpect;
3286 PL_copline = ocopline;
3287 }
e4783991
GS		 3288}
3289
79072805 3290OP *
864dbfa3 3291Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3292{
3293 OP *doop;
3294 GV *gv;
3295
3296 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3297 if (!(gv && GvIMPORTED_CV(gv)))
3298 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3299
3300 if (gv && GvIMPORTED_CV(gv)) {
3301 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3302 append_elem(OP_LIST, term,
3303 scalar(newUNOP(OP_RV2CV, 0,
3304 newGVOP(OP_GV, 0,
3305 gv))))));
3306 }
3307 else {
3308 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3309 }
3310 return doop;
3311}
3312
3313OP *
864dbfa3 3314Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3315{
3316 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3317 list(force_list(subscript)),
3318 list(force_list(listval)) );
79072805
LW		 3319}
3320
76e3520e 3321STATIC I32
cea2e8a9 3322S_list_assignment(pTHX_ register OP *o)
79072805 3323{
11343788 3324 if (!o)
79072805
LW		 3325 return TRUE;
3326
11343788
MB		 3327 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3328 o = cUNOPo->op_first;
79072805 3329
11343788 3330 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3331 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3332 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3333
3334 if (t && f)
3335 return TRUE;
3336 if (t || f)
3337 yyerror("Assignment to both a list and a scalar");
3338 return FALSE;
3339 }
3340
11343788
MB		 3341 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3342 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3343 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3344 return TRUE;
3345
11343788 3346 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3347 return TRUE;
3348
11343788 3349 if (o->op_type == OP_RV2SV)
79072805
LW		 3350 return FALSE;
3351
3352 return FALSE;
3353}
3354
3355OP *
864dbfa3 3356Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3357{
11343788 3358 OP *o;
79072805 3359
a0d0e21e
LW		 3360 if (optype) {
3361 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3362 return newLOGOP(optype, 0,
3363 mod(scalar(left), optype),
3364 newUNOP(OP_SASSIGN, 0, scalar(right)));
3365 }
3366 else {
3367 return newBINOP(optype, OPf_STACKED,
3368 mod(scalar(left), optype), scalar(right));
3369 }
3370 }
3371
79072805 3372 if (list_assignment(left)) {
6ee623d5 3373 dTHR;
10c8fecd
GS		 3374 OP *curop;
3375
3280af22
NIS		 3376 PL_modcount = 0;
3377 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3378 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3379 if (PL_eval_start)
3380 PL_eval_start = 0;
748a9306 3381 else {
a0d0e21e
LW		 3382 op_free(left);
3383 op_free(right);
3384 return Nullop;
3385 }
10c8fecd
GS		 3386 curop = list(force_list(left));
3387 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3388 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3389 for (curop = ((LISTOP*)curop)->op_first;
3390 curop; curop = curop->op_sibling)
3391 {
3392 if (curop->op_type == OP_RV2HV &&
3393 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3394 o->op_private |= OPpASSIGN_HASH;
3395 break;
3396 }
3397 }
a0d0e21e 3398 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3399 OP *lastop = o;
3280af22 3400 PL_generation++;
11343788 3401 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3402 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3403 if (curop->op_type == OP_GV) {
638eceb6 3404 GV *gv = cGVOPx_gv(curop);
3280af22 3405 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3406 break;
3280af22 3407 SvCUR(gv) = PL_generation;
79072805 3408 }
748a9306
LW		 3409 else if (curop->op_type == OP_PADSV ||
3410 curop->op_type == OP_PADAV ||
3411 curop->op_type == OP_PADHV ||
3412 curop->op_type == OP_PADANY) {
3280af22 3413 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3414 SV *sv = svp[curop->op_targ];
3280af22 3415 if (SvCUR(sv) == PL_generation)
748a9306 3416 break;
3280af22 3417 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3418 }
79072805
LW		 3419 else if (curop->op_type == OP_RV2CV)
3420 break;
3421 else if (curop->op_type == OP_RV2SV ||
3422 curop->op_type == OP_RV2AV ||
3423 curop->op_type == OP_RV2HV ||
3424 curop->op_type == OP_RV2GV) {
3425 if (lastop->op_type != OP_GV) /* funny deref? */
3426 break;
3427 }
1167e5da
SM		 3428 else if (curop->op_type == OP_PUSHRE) {
3429 if (((PMOP*)curop)->op_pmreplroot) {
b3f5893f
GS		 3430#ifdef USE_ITHREADS
3431 GV *gv = (GV*)PL_curpad[(PADOFFSET)((PMOP*)curop)->op_pmreplroot];
3432#else
1167e5da 3433 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
b3f5893f 3434#endif
3280af22 3435 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3436 break;
3280af22 3437 SvCUR(gv) = PL_generation;
1167e5da
SM		 3438 }
3439 }
79072805
LW		 3440 else
3441 break;
3442 }
3443 lastop = curop;
3444 }
11343788 3445 if (curop != o)
10c8fecd 3446 o->op_private |= OPpASSIGN_COMMON;
79072805 3447 }
c07a80fd 3448 if (right && right->op_type == OP_SPLIT) {
3449 OP* tmpop;
3450 if ((tmpop = ((LISTOP*)right)->op_first) &&
3451 tmpop->op_type == OP_PUSHRE)
3452 {
3453 PMOP *pm = (PMOP*)tmpop;
3454 if (left->op_type == OP_RV2AV &&
3455 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3456 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3457 {
3458 tmpop = ((UNOP*)left)->op_first;
3459 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3460#ifdef USE_ITHREADS
3461 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3462 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3463#else
3464 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3465 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3466#endif
c07a80fd 3467 pm->op_pmflags |= PMf_ONCE;
11343788 3468 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3469 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3470 tmpop->op_sibling = Nullop; /* don't free split */
3471 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3472 op_free(o); /* blow off assign */
54310121 3473 right->op_flags &= ~OPf_WANT;
a5f75d66 3474 /* "I don't know and I don't care." */
c07a80fd 3475 return right;
3476 }
3477 }
3478 else {
3280af22 3479 if (PL_modcount < 10000 &&
c07a80fd 3480 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3481 {
3482 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3483 if (SvIVX(sv) == 0)
3280af22 3484 sv_setiv(sv, PL_modcount+1);
c07a80fd 3485 }
3486 }
3487 }
3488 }
11343788 3489 return o;
79072805
LW		 3490 }
3491 if (!right)
3492 right = newOP(OP_UNDEF, 0);
3493 if (right->op_type == OP_READLINE) {
3494 right->op_flags |= OPf_STACKED;
463ee0b2 3495 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3496 }
a0d0e21e 3497 else {
3280af22 3498 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3499 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3500 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3501 if (PL_eval_start)
3502 PL_eval_start = 0;
748a9306 3503 else {
11343788 3504 op_free(o);
a0d0e21e
LW		 3505 return Nullop;
3506 }
3507 }
11343788 3508 return o;
79072805
LW		 3509}
3510
3511OP *
864dbfa3 3512Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3513{
11343788 3514 dTHR;
bbce6d69 3515 U32 seq = intro_my();
79072805
LW		 3516 register COP *cop;
3517
b7dc083c 3518 NewOp(1101, cop, 1, COP);
57843af0 3519 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3520 cop->op_type = OP_DBSTATE;
22c35a8c 3521 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3522 }
3523 else {
3524 cop->op_type = OP_NEXTSTATE;
22c35a8c 3525 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3526 }
79072805 3527 cop->op_flags = flags;
393fec97 3528 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3529#ifdef NATIVE_HINTS
3530 cop->op_private |= NATIVE_HINTS;
3531#endif
e24b16f9 3532 PL_compiling.op_private = cop->op_private;
79072805
LW		 3533 cop->op_next = (OP*)cop;
3534
463ee0b2
LW		 3535 if (label) {
3536 cop->cop_label = label;
3280af22 3537 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3538 }
bbce6d69 3539 cop->cop_seq = seq;
3280af22 3540 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3541 if (specialWARN(PL_curcop->cop_warnings))
599cee73 3542 cop->cop_warnings = PL_curcop->cop_warnings ;
1c846c1f 3543 else
599cee73 3544 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
ac27b0f5
NIS		 3545 if (specialCopIO(PL_curcop->cop_io))
3546 cop->cop_io = PL_curcop->cop_io;
3547 else
3548 cop->cop_io = newSVsv(PL_curcop->cop_io) ;
599cee73 3549
79072805 3550
3280af22 3551 if (PL_copline == NOLINE)
57843af0 3552 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3553 else {
57843af0 3554 CopLINE_set(cop, PL_copline);
3280af22 3555 PL_copline = NOLINE;
79072805 3556 }
57843af0 3557#ifdef USE_ITHREADS
f4dd75d9 3558 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */
57843af0 3559#else
f4dd75d9 3560 CopFILEGV_set(cop, CopFILEGV(PL_curcop));
57843af0 3561#endif
11faa288 3562 CopSTASH_set(cop, PL_curstash);
79072805 3563
3280af22 3564 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3565 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3566 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3567 (void)SvIOK_on(*svp);
57b2e452 3568 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3569 }
3570 }
3571
11343788 3572 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3573}
3574
bbce6d69 3575/* "Introduce" my variables to visible status. */
3576U32
864dbfa3 3577Perl_intro_my(pTHX)
bbce6d69 3578{
3579 SV **svp;
3580 SV *sv;
3581 I32 i;
3582
3280af22
NIS		 3583 if (! PL_min_intro_pending)
3584 return PL_cop_seqmax;
bbce6d69 3585
3280af22
NIS		 3586 svp = AvARRAY(PL_comppad_name);
3587 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3588 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3589 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3590 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3591 }
3592 }
3280af22
NIS		 3593 PL_min_intro_pending = 0;
3594 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3595 return PL_cop_seqmax++;
bbce6d69 3596}
3597
79072805 3598OP *
864dbfa3 3599Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3600{
883ffac3
CS		 3601 return new_logop(type, flags, &first, &other);
3602}
3603
3bd495df 3604STATIC OP *
cea2e8a9 3605S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3606{
11343788 3607 dTHR;
79072805 3608 LOGOP *logop;
11343788 3609 OP *o;
883ffac3
CS		 3610 OP *first = *firstp;
3611 OP *other = *otherp;
79072805 3612
a0d0e21e
LW		 3613 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3614 return newBINOP(type, flags, scalar(first), scalar(other));
3615
8990e307 3616 scalarboolean(first);
79072805
LW		 3617 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3618 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3619 if (type == OP_AND || type == OP_OR) {
3620 if (type == OP_AND)
3621 type = OP_OR;
3622 else
3623 type = OP_AND;
11343788 3624 o = first;
883ffac3 3625 first = *firstp = cUNOPo->op_first;
11343788
MB		 3626 if (o->op_next)
3627 first->op_next = o->op_next;
3628 cUNOPo->op_first = Nullop;
3629 op_free(o);
79072805
LW		 3630 }
3631 }
3632 if (first->op_type == OP_CONST) {
4673fc70 3633 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
1c846c1f 3634 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3635 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3636 op_free(first);
883ffac3 3637 *firstp = Nullop;
79072805
LW		 3638 return other;
3639 }
3640 else {
3641 op_free(other);
883ffac3 3642 *otherp = Nullop;
79072805
LW		 3643 return first;
3644 }
3645 }
3646 else if (first->op_type == OP_WANTARRAY) {
3647 if (type == OP_AND)
3648 list(other);
3649 else
3650 scalar(other);
3651 }
e476b1b5 3652 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3653 OP *k1 = ((UNOP*)first)->op_first;
3654 OP *k2 = k1->op_sibling;
3655 OPCODE warnop = 0;
3656 switch (first->op_type)
3657 {
3658 case OP_NULL:
3659 if (k2 && k2->op_type == OP_READLINE
3660 && (k2->op_flags & OPf_STACKED)
1c846c1f 3661 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3662 {
a6006777 3663 warnop = k2->op_type;
72b16652 3664 }
a6006777 3665 break;
3666
3667 case OP_SASSIGN:
68dc0745 3668 if (k1->op_type == OP_READDIR
3669 || k1->op_type == OP_GLOB
72b16652 3670 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3671 || k1->op_type == OP_EACH)
72b16652
GS		 3672 {
3673 warnop = ((k1->op_type == OP_NULL)
3674 ? k1->op_targ : k1->op_type);
3675 }
a6006777 3676 break;
3677 }
8ebc5c01 3678 if (warnop) {
57843af0
GS		 3679 line_t oldline = CopLINE(PL_curcop);
3680 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3681 Perl_warner(aTHX_ WARN_MISC,
599cee73 3682 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3683 PL_op_desc[warnop],
68dc0745 3684 ((warnop == OP_READLINE || warnop == OP_GLOB)
3685 ? " construct" : "() operator"));
57843af0 3686 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3687 }
a6006777 3688 }
79072805
LW		 3689
3690 if (!other)
3691 return first;
3692
a0d0e21e
LW		 3693 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3694 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3695
b7dc083c 3696 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3697
3698 logop->op_type = type;
22c35a8c 3699 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3700 logop->op_first = first;
3701 logop->op_flags = flags | OPf_KIDS;
3702 logop->op_other = LINKLIST(other);
c07a80fd 3703 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3704
3705 /* establish postfix order */
3706 logop->op_next = LINKLIST(first);
3707 first->op_next = (OP*)logop;
3708 first->op_sibling = other;
3709
11343788
MB		 3710 o = newUNOP(OP_NULL, 0, (OP*)logop);
3711 other->op_next = o;
79072805 3712
11343788 3713 return o;
79072805
LW		 3714}
3715
3716OP *
864dbfa3 3717Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3718{
11343788 3719 dTHR;
1a67a97c
SM		 3720 LOGOP *logop;
3721 OP *start;
11343788 3722 OP *o;
79072805 3723
b1cb66bf 3724 if (!falseop)
3725 return newLOGOP(OP_AND, 0, first, trueop);
3726 if (!trueop)
3727 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3728
8990e307 3729 scalarboolean(first);
79072805
LW		 3730 if (first->op_type == OP_CONST) {
3731 if (SvTRUE(((SVOP*)first)->op_sv)) {
3732 op_free(first);
b1cb66bf 3733 op_free(falseop);
3734 return trueop;
79072805
LW		 3735 }
3736 else {
3737 op_free(first);
b1cb66bf 3738 op_free(trueop);
3739 return falseop;
79072805
LW		 3740 }
3741 }
3742 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3743 list(trueop);
3744 scalar(falseop);
79072805 3745 }
1a67a97c
SM		 3746 NewOp(1101, logop, 1, LOGOP);
3747 logop->op_type = OP_COND_EXPR;
3748 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3749 logop->op_first = first;
3750 logop->op_flags = flags | OPf_KIDS;
3751 logop->op_private = 1 | (flags >> 8);
3752 logop->op_other = LINKLIST(trueop);
3753 logop->op_next = LINKLIST(falseop);
79072805 3754
79072805
LW		 3755
3756 /* establish postfix order */
1a67a97c
SM		 3757 start = LINKLIST(first);
3758 first->op_next = (OP*)logop;
79072805 3759
b1cb66bf 3760 first->op_sibling = trueop;
3761 trueop->op_sibling = falseop;
1a67a97c 3762 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3763
1a67a97c 3764 trueop->op_next = falseop->op_next = o;
79072805 3765
1a67a97c 3766 o->op_next = start;
11343788 3767 return o;
79072805
LW		 3768}
3769
3770OP *
864dbfa3 3771Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3772{
b35b2403 3773 dTHR;
1a67a97c 3774 LOGOP *range;
79072805
LW		 3775 OP *flip;
3776 OP *flop;
1a67a97c 3777 OP *leftstart;
11343788 3778 OP *o;
79072805 3779
1a67a97c 3780 NewOp(1101, range, 1, LOGOP);
79072805 3781
1a67a97c
SM		 3782 range->op_type = OP_RANGE;
3783 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3784 range->op_first = left;
3785 range->op_flags = OPf_KIDS;
3786 leftstart = LINKLIST(left);
3787 range->op_other = LINKLIST(right);
3788 range->op_private = 1 | (flags >> 8);
79072805
LW		 3789
3790 left->op_sibling = right;
3791
1a67a97c
SM		 3792 range->op_next = (OP*)range;
3793 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3794 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3795 o = newUNOP(OP_NULL, 0, flop);
79072805 3796 linklist(flop);
1a67a97c 3797 range->op_next = leftstart;
79072805
LW		 3798
3799 left->op_next = flip;
3800 right->op_next = flop;
3801
1a67a97c
SM		 3802 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3803 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3804 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3805 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3806
3807 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3808 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3809
11343788 3810 flip->op_next = o;
79072805 3811 if (!flip->op_private || !flop->op_private)
11343788 3812 linklist(o); /* blow off optimizer unless constant */
79072805 3813
11343788 3814 return o;
79072805
LW		 3815}
3816
3817OP *
864dbfa3 3818Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3819{
11343788 3820 dTHR;
463ee0b2 3821 OP* listop;
11343788 3822 OP* o;
463ee0b2 3823 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3824 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3825
463ee0b2
LW		 3826 if (expr) {
3827 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3828 return block; /* do {} while 0 does once */
fb73857a 3829 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3830 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3831 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3832 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3833 } else if (expr->op_flags & OPf_KIDS) {
3834 OP *k1 = ((UNOP*)expr)->op_first;
3835 OP *k2 = (k1) ? k1->op_sibling : NULL;
3836 switch (expr->op_type) {
1c846c1f 3837 case OP_NULL:
55d729e4
GS		 3838 if (k2 && k2->op_type == OP_READLINE
3839 && (k2->op_flags & OPf_STACKED)
1c846c1f 3840 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3841 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3842 break;
55d729e4
GS		 3843
3844 case OP_SASSIGN:
3845 if (k1->op_type == OP_READDIR
3846 || k1->op_type == OP_GLOB
72b16652 3847 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3848 || k1->op_type == OP_EACH)
3849 expr = newUNOP(OP_DEFINED, 0, expr);
3850 break;
3851 }
774d564b 3852 }
463ee0b2 3853 }
93a17b20 3854
8990e307 3855 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3856 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3857
883ffac3
CS		 3858 if (listop)
3859 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3860
11343788
MB		 3861 if (once && o != listop)
3862 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3863
11343788
MB		 3864 if (o == listop)
3865 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3866
11343788
MB		 3867 o->op_flags |= flags;
3868 o = scope(o);
3869 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3870 return o;
79072805
LW		 3871}
3872
3873OP *
864dbfa3 3874Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3875{
11343788 3876 dTHR;
79072805
LW		 3877 OP *redo;
3878 OP *next = 0;
3879 OP *listop;
11343788 3880 OP *o;
79072805 3881 OP *condop;
1ba6ee2b 3882 U8 loopflags = 0;
79072805 3883
fb73857a 3884 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3885 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3886 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3887 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3888 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3889 OP *k1 = ((UNOP*)expr)->op_first;
3890 OP *k2 = (k1) ? k1->op_sibling : NULL;
3891 switch (expr->op_type) {
1c846c1f 3892 case OP_NULL:
55d729e4
GS		 3893 if (k2 && k2->op_type == OP_READLINE
3894 && (k2->op_flags & OPf_STACKED)
1c846c1f 3895 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3896 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3897 break;
55d729e4
GS		 3898
3899 case OP_SASSIGN:
3900 if (k1->op_type == OP_READDIR
3901 || k1->op_type == OP_GLOB
72b16652 3902 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3903 || k1->op_type == OP_EACH)
3904 expr = newUNOP(OP_DEFINED, 0, expr);
3905 break;
3906 }
748a9306 3907 }
79072805
LW		 3908
3909 if (!block)
3910 block = newOP(OP_NULL, 0);
87246558
GS		 3911 else if (cont) {
3912 block = scope(block);
3913 }
79072805 3914
1ba6ee2b 3915 if (cont) {
79072805 3916 next = LINKLIST(cont);
1ba6ee2b
GS		 3917 loopflags |= OPpLOOP_CONTINUE;
3918 }
fb73857a 3919 if (expr) {
85538317
GS		 3920 OP *unstack = newOP(OP_UNSTACK, 0);
3921 if (!next)
3922 next = unstack;
3923 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3924 if ((line_t)whileline != NOLINE) {
3280af22 3925 PL_copline = whileline;
fb73857a 3926 cont = append_elem(OP_LINESEQ, cont,
3927 newSTATEOP(0, Nullch, Nullop));
3928 }
3929 }
79072805 3930
463ee0b2 3931 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3932 redo = LINKLIST(listop);
3933
3934 if (expr) {
3280af22 3935 PL_copline = whileline;
883ffac3
CS		 3936 scalar(listop);
3937 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3938 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3939 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3940 op_free((OP*)loop);
883ffac3 3941 return Nullop; /* listop already freed by new_logop */
463ee0b2 3942 }
883ffac3
CS		 3943 if (listop)
3944 ((LISTOP*)listop)->op_last->op_next = condop =
3945 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3946 }
3947 else
11343788 3948 o = listop;
79072805
LW		 3949
3950 if (!loop) {
b7dc083c 3951 NewOp(1101,loop,1,LOOP);
79072805 3952 loop->op_type = OP_ENTERLOOP;
22c35a8c 3953 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3954 loop->op_private = 0;
3955 loop->op_next = (OP*)loop;
3956 }
3957
11343788 3958 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3959
3960 loop->op_redoop = redo;
11343788 3961 loop->op_lastop = o;
1ba6ee2b 3962 o->op_private |= loopflags;
79072805
LW		 3963
3964 if (next)
3965 loop->op_nextop = next;
3966 else
11343788 3967 loop->op_nextop = o;
79072805 3968
11343788
MB		 3969 o->op_flags |= flags;
3970 o->op_private |= (flags >> 8);
3971 return o;
79072805
LW		 3972}
3973
3974OP *
864dbfa3 3975Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3976{
3977 LOOP *loop;
fb73857a 3978 OP *wop;
85e6fe83 3979 int padoff = 0;
4633a7c4 3980 I32 iterflags = 0;
79072805 3981
79072805 3982 if (sv) {
85e6fe83 3983 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3984 sv->op_type = OP_RV2GV;
22c35a8c 3985 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3986 }
85e6fe83
LW		 3987 else if (sv->op_type == OP_PADSV) { /* private variable */
3988 padoff = sv->op_targ;
743e66e6 3989 sv->op_targ = 0;
85e6fe83
LW		 3990 op_free(sv);
3991 sv = Nullop;
3992 }
54b9620d
MB		 3993 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3994 padoff = sv->op_targ;
743e66e6 3995 sv->op_targ = 0;
54b9620d
MB		 3996 iterflags |= OPf_SPECIAL;
3997 op_free(sv);
3998 sv = Nullop;
3999 }
79072805 4000 else
cea2e8a9 4001 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 4002 }
4003 else {
54b9620d
MB		 4004#ifdef USE_THREADS
4005 padoff = find_threadsv("_");
4006 iterflags |= OPf_SPECIAL;
4007#else
3280af22 4008 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 4009#endif
79072805 4010 }
5f05dabc 4011 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 4012 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 4013 iterflags |= OPf_STACKED;
4014 }
89ea2908
GA		 4015 else if (expr->op_type == OP_NULL &&
4016 (expr->op_flags & OPf_KIDS) &&
4017 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
4018 {
4019 /* Basically turn for($x..$y) into the same as for($x,$y), but we
4020 * set the STACKED flag to indicate that these values are to be
4021 * treated as min/max values by 'pp_iterinit'.
4022 */
4023 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 4024 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 4025 OP* left = range->op_first;
4026 OP* right = left->op_sibling;
5152d7c7 4027 LISTOP* listop;
89ea2908
GA		 4028
4029 range->op_flags &= ~OPf_KIDS;
4030 range->op_first = Nullop;
4031
5152d7c7 4032 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 4033 listop->op_first->op_next = range->op_next;
4034 left->op_next = range->op_other;
5152d7c7
GS		 4035 right->op_next = (OP*)listop;
4036 listop->op_next = listop->op_first;
89ea2908
GA		 4037
4038 op_free(expr);
5152d7c7 4039 expr = (OP*)(listop);
89ea2908
GA		 4040 null(expr);
4041 iterflags |= OPf_STACKED;
4042 }
4043 else {
4044 expr = mod(force_list(expr), OP_GREPSTART);
4045 }
4046
4047
4633a7c4 4048 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 4049 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 4050 assert(!loop->op_next);
b7dc083c 4051#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 4052 {
4053 LOOP *tmp;
4054 NewOp(1234,tmp,1,LOOP);
4055 Copy(loop,tmp,1,LOOP);
4056 loop = tmp;
4057 }
b7dc083c 4058#else
85e6fe83 4059 Renew(loop, 1, LOOP);
1c846c1f 4060#endif
85e6fe83 4061 loop->op_targ = padoff;
fb73857a 4062 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4063 PL_copline = forline;
fb73857a 4064 return newSTATEOP(0, label, wop);
79072805
LW		 4065}
4066
8990e307 4067OP*
864dbfa3 4068Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4069{
11343788
MB		 4070 dTHR;
4071 OP *o;
2d8e6c8d
GS		 4072 STRLEN n_a;
4073
8990e307 4074 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4075 /* "last()" means "last" */
4076 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4077 o = newOP(type, OPf_SPECIAL);
4078 else {
4079 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4080 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4081 : ""));
4082 }
8990e307
LW		 4083 op_free(label);
4084 }
4085 else {
a0d0e21e
LW		 4086 if (label->op_type == OP_ENTERSUB)
4087 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4088 o = newUNOP(type, OPf_STACKED, label);
8990e307 4089 }
3280af22 4090 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4091 return o;
8990e307
LW		 4092}
4093
79072805 4094void
864dbfa3 4095Perl_cv_undef(pTHX_ CV *cv)
79072805 4096{
11343788
MB		 4097 dTHR;
4098#ifdef USE_THREADS
e858de61
MB		 4099 if (CvMUTEXP(cv)) {
4100 MUTEX_DESTROY(CvMUTEXP(cv));
4101 Safefree(CvMUTEXP(cv));
4102 CvMUTEXP(cv) = 0;
4103 }
11343788
MB		 4104#endif /* USE_THREADS */
4105
a0d0e21e 4106 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4107#ifdef USE_THREADS
4108 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4109 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4110#else
a0d0e21e 4111 if (CvDEPTH(cv))
cea2e8a9 4112 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4113#endif /* USE_THREADS */
8990e307 4114 ENTER;
a0d0e21e 4115
7766f137 4116 SAVEVPTR(PL_curpad);
3280af22 4117 PL_curpad = 0;
a0d0e21e 4118
a5f75d66 4119 if (!CvCLONED(cv))
748a9306 4120 op_free(CvROOT(cv));
79072805 4121 CvROOT(cv) = Nullop;
8990e307 4122 LEAVE;
79072805 4123 }
1d5db326 4124 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4125 CvFLAGS(cv) = 0;
8e07c86e
AD		 4126 SvREFCNT_dec(CvGV(cv));
4127 CvGV(cv) = Nullgv;
4128 SvREFCNT_dec(CvOUTSIDE(cv));
4129 CvOUTSIDE(cv) = Nullcv;
beab0874
JT		 4130 if (CvCONST(cv)) {
4131 SvREFCNT_dec((SV*)CvXSUBANY(cv).any_ptr);
4132 CvCONST_off(cv);
4133 }
8e07c86e 4134 if (CvPADLIST(cv)) {
8ebc5c01 4135 /* may be during global destruction */
4136 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4137 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4138 while (i >= 0) {
4139 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4140 SV* sv = svp ? *svp : Nullsv;
4141 if (!sv)
4142 continue;
3280af22
NIS		 4143 if (sv == (SV*)PL_comppad_name)
4144 PL_comppad_name = Nullav;
4145 else if (sv == (SV*)PL_comppad) {
4146 PL_comppad = Nullav;
4147 PL_curpad = Null(SV**);
46fc3d4c 4148 }
4149 SvREFCNT_dec(sv);
8ebc5c01 4150 }
4151 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4152 }
8e07c86e
AD		 4153 CvPADLIST(cv) = Nullav;
4154 }
79072805
LW		 4155}
4156
76e3520e 4157STATIC void
743e66e6 4158S_cv_dump(pTHX_ CV *cv)
5f05dabc 4159{
62fde642 4160#ifdef DEBUGGING
5f05dabc 4161 CV *outside = CvOUTSIDE(cv);
4162 AV* padlist = CvPADLIST(cv);
4fdae800 4163 AV* pad_name;
4164 AV* pad;
4165 SV** pname;
4166 SV** ppad;
5f05dabc 4167 I32 ix;
4168
b900a521
JH		 4169 PerlIO_printf(Perl_debug_log,
4170 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4171 PTR2UV(cv),
ab50184a 4172 (CvANON(cv) ? "ANON"
6b88bc9c 4173 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4174 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4175 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4176 PTR2UV(outside),
ab50184a
CS		 4177 (!outside ? "null"
4178 : CvANON(outside) ? "ANON"
6b88bc9c 4179 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4180 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4181 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4182
4fdae800 4183 if (!padlist)
4184 return;
4185
4186 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4187 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4188 pname = AvARRAY(pad_name);
4189 ppad = AvARRAY(pad);
4190
93965878 4191 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4192 if (SvPOK(pname[ix]))
b900a521
JH		 4193 PerlIO_printf(Perl_debug_log,
4194 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4195 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4196 SvFAKE(pname[ix]) ? "FAKE " : "",
4197 SvPVX(pname[ix]),
b900a521
JH		 4198 (IV)I_32(SvNVX(pname[ix])),
4199 SvIVX(pname[ix]));
5f05dabc 4200 }
743e66e6 4201#endif /* DEBUGGING */
62fde642 4202}
5f05dabc 4203
76e3520e 4204STATIC CV *
cea2e8a9 4205S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4206{
11343788 4207 dTHR;
748a9306
LW		 4208 AV* av;
4209 I32 ix;
4210 AV* protopadlist = CvPADLIST(proto);
4211 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4212 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4213 SV** pname = AvARRAY(protopad_name);
4214 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4215 I32 fname = AvFILLp(protopad_name);
4216 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4217 AV* comppadlist;
4218 CV* cv;
4219
07055b4c
CS		 4220 assert(!CvUNIQUE(proto));
4221
748a9306 4222 ENTER;
354992b1 4223 SAVECOMPPAD();
3280af22
NIS		 4224 SAVESPTR(PL_comppad_name);
4225 SAVESPTR(PL_compcv);
748a9306 4226
3280af22 4227 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4228 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4229 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4230 CvCLONED_on(cv);
748a9306 4231
11343788 4232#ifdef USE_THREADS
12ca11f6 4233 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4234 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4235 CvOWNER(cv) = 0;
4236#endif /* USE_THREADS */
57843af0 4237 CvFILE(cv) = CvFILE(proto);
44a8e56a 4238 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4239 CvSTASH(cv) = CvSTASH(proto);
4240 CvROOT(cv) = CvROOT(proto);
4241 CvSTART(cv) = CvSTART(proto);
5f05dabc 4242 if (outside)
4243 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4244
68dc0745 4245 if (SvPOK(proto))
4246 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4247
3280af22 4248 PL_comppad_name = newAV();
46fc3d4c 4249 for (ix = fname; ix >= 0; ix--)
3280af22 4250 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4251
3280af22 4252 PL_comppad = newAV();
748a9306
LW		 4253
4254 comppadlist = newAV();
4255 AvREAL_off(comppadlist);
3280af22
NIS		 4256 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4257 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4258 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4259 av_fill(PL_comppad, AvFILLp(protopad));
4260 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4261
4262 av = newAV(); /* will be @_ */
4263 av_extend(av, 0);
3280af22 4264 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4265 AvFLAGS(av) = AVf_REIFY;
4266
9607fc9c 4267 for (ix = fpad; ix > 0; ix--) {
4268 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4269 if (namesv && namesv != &PL_sv_undef) {
aa689395 4270 char *name = SvPVX(namesv); /* XXX */
4271 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4272 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4273 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4274 if (!off)
3280af22 4275 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4276 else if (off != ix)
cea2e8a9 4277 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4278 }
4279 else { /* our own lexical */
aa689395 4280 SV* sv;
5f05dabc 4281 if (*name == '&') {
4282 /* anon code -- we'll come back for it */
4283 sv = SvREFCNT_inc(ppad[ix]);
4284 }
4285 else if (*name == '@')
4286 sv = (SV*)newAV();
748a9306 4287 else if (*name == '%')
5f05dabc 4288 sv = (SV*)newHV();
748a9306 4289 else
5f05dabc 4290 sv = NEWSV(0,0);
4291 if (!SvPADBUSY(sv))
4292 SvPADMY_on(sv);
3280af22 4293 PL_curpad[ix] = sv;
748a9306
LW		 4294 }
4295 }
7766f137 4296 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4297 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4298 }
748a9306 4299 else {
aa689395 4300 SV* sv = NEWSV(0,0);
748a9306 4301 SvPADTMP_on(sv);
3280af22 4302 PL_curpad[ix] = sv;
748a9306
LW		 4303 }
4304 }
4305
5f05dabc 4306 /* Now that vars are all in place, clone nested closures. */
4307
9607fc9c 4308 for (ix = fpad; ix > 0; ix--) {
4309 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4310 if (namesv
3280af22 4311 && namesv != &PL_sv_undef
aa689395 4312 && !(SvFLAGS(namesv) & SVf_FAKE)
4313 && *SvPVX(namesv) == '&'
5f05dabc 4314 && CvCLONE(ppad[ix]))
4315 {
4316 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4317 SvREFCNT_dec(ppad[ix]);
4318 CvCLONE_on(kid);
4319 SvPADMY_on(kid);
3280af22 4320 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4321 }
4322 }
4323
5f05dabc 4324#ifdef DEBUG_CLOSURES
ab50184a
CS		 4325 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4326 cv_dump(outside);
4327 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4328 cv_dump(proto);
ab50184a 4329 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4330 cv_dump(cv);
4331#endif
4332
748a9306 4333 LEAVE;
beab0874
JT		 4334
4335 if (CvCONST(cv)) {
4336 SV* const_sv = op_const_sv(CvSTART(cv), cv);
4337 assert(const_sv);
4338 /* constant sub () { $x } closing over $x - see lib/constant.pm */
4339 SvREFCNT_dec(cv);
4340 cv = newCONSTSUB(CvSTASH(proto), 0, const_sv);
4341 }
4342
748a9306
LW		 4343 return cv;
4344}
4345
4346CV *
864dbfa3 4347Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4348{
b099ddc0 4349 CV *cv;
1feb2720 4350 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4351 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4352 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4353 return cv;
5f05dabc 4354}
4355
3fe9a6f1 4356void
864dbfa3 4357Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4358{
0453d815
PM		 4359 dTHR;
4360
e476b1b5 4361 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4362 SV* msg = sv_newmortal();
3fe9a6f1 4363 SV* name = Nullsv;
4364
4365 if (gv)
46fc3d4c 4366 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4367 sv_setpv(msg, "Prototype mismatch:");
4368 if (name)
894356b3 4369 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4370 if (SvPOK(cv))
cea2e8a9 4371 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4372 sv_catpv(msg, " vs ");
4373 if (p)
cea2e8a9 4374 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4375 else
4376 sv_catpv(msg, "none");
e476b1b5 4377 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4378 }
4379}
4380
beab0874
JT		 4381static void const_sv_xsub(pTHXo_ CV* cv);
4382
4383/*
4384=for apidoc cv_const_sv
4385
4386If C<cv> is a constant sub eligible for inlining. returns the constant
4387value returned by the sub. Otherwise, returns NULL.
4388
4389Constant subs can be created with C<newCONSTSUB> or as described in
4390L<perlsub/"Constant Functions">.
4391
4392=cut
4393*/
760ac839 4394SV *
864dbfa3 4395Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4396{
beab0874 4397 if (!cv || !CvCONST(cv))
54310121 4398 return Nullsv;
beab0874 4399 return (SV*)CvXSUBANY(cv).any_ptr;
fe5e78ed 4400}
760ac839 4401
fe5e78ed 4402SV *
864dbfa3 4403Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4404{
4405 SV *sv = Nullsv;
4406
0f79a09d 4407 if (!o)
fe5e78ed 4408 return Nullsv;
1c846c1f
NIS		 4409
4410 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4411 o = cLISTOPo->op_first->op_sibling;
4412
4413 for (; o; o = o->op_next) {
54310121 4414 OPCODE type = o->op_type;
fe5e78ed 4415
1c846c1f 4416 if (sv && o->op_next == o)
fe5e78ed 4417 return sv;
e576b457
JT		 4418 if (o->op_next != o) {
4419 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4420 continue;
4421 if (type == OP_DBSTATE)
4422 continue;
4423 }
54310121 4424 if (type == OP_LEAVESUB || type == OP_RETURN)
4425 break;
4426 if (sv)
4427 return Nullsv;
7766f137 4428 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4429 sv = cSVOPo->op_sv;
7766f137 4430 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4431 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4432 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
beab0874
JT		 4433 if (!sv)
4434 return Nullsv;
4435 if (CvCONST(cv)) {
4436 /* We get here only from cv_clone2() while creating a closure.
4437 Copy the const value here instead of in cv_clone2 so that
4438 SvREADONLY_on doesn't lead to problems when leaving
4439 scope.
4440 */
4441 sv = newSVsv(sv);
4442 }
4443 if (!SvREADONLY(sv) && SvREFCNT(sv) > 1)
54310121 4444 return Nullsv;
760ac839 4445 }
54310121 4446 else
4447 return Nullsv;
760ac839 4448 }
5aabfad6 4449 if (sv)
4450 SvREADONLY_on(sv);
760ac839
LW		 4451 return sv;
4452}
4453
09bef843
SB		 4454void
4455Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4456{
4457 if (o)
4458 SAVEFREEOP(o);
4459 if (proto)
4460 SAVEFREEOP(proto);
4461 if (attrs)
4462 SAVEFREEOP(attrs);
4463 if (block)
4464 SAVEFREEOP(block);
4465 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4466}
4467
748a9306 4468CV *
864dbfa3 4469Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4470{
09bef843
SB		 4471 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4472}
4473
4474CV *
4475Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4476{
11343788 4477 dTHR;
2d8e6c8d 4478 STRLEN n_a;
83ee9e09
GS		 4479 char *name;
4480 char *aname;
4481 GV *gv;
2d8e6c8d 4482 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4483 register CV *cv=0;
a0d0e21e 4484 I32 ix;
beab0874 4485 SV *const_sv;
79072805 4486
83ee9e09
GS		 4487 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4488 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4489 SV *sv = sv_newmortal();
4490 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4491 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4492 aname = SvPVX(sv);
4493 }
4494 else
4495 aname = Nullch;
4496 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4497 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4498 SVt_PVCV);
4499
11343788 4500 if (o)
5dc0d613 4501 SAVEFREEOP(o);
3fe9a6f1 4502 if (proto)
4503 SAVEFREEOP(proto);
09bef843
SB		 4504 if (attrs)
4505 SAVEFREEOP(attrs);
3fe9a6f1 4506
09bef843 4507 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4508 maximum a prototype before. */
4509 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4510 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4511 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4512 {
e476b1b5 4513 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4514 }
55d729e4
GS		 4515 cv_ckproto((CV*)gv, NULL, ps);
4516 }
4517 if (ps)
4518 sv_setpv((SV*)gv, ps);
4519 else
4520 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4521 SvREFCNT_dec(PL_compcv);
4522 cv = PL_compcv = NULL;
4523 PL_sub_generation++;
beab0874 4524 goto done;
55d729e4
GS		 4525 }
4526
beab0874
JT		 4527 cv = (!name || GvCVGEN(gv)) ? Nullcv : GvCV(gv);
4528
4529 if (!block || !ps || *ps || attrs)
4530 const_sv = Nullsv;
4531 else
4532 const_sv = op_const_sv(block, Nullcv);
4533
4534 if (cv) {
60ed1d8c
GS		 4535 bool exists = CvROOT(cv) || CvXSUB(cv);
4536 /* if the subroutine doesn't exist and wasn't pre-declared
4537 * with a prototype, assume it will be AUTOLOADed,
4538 * skipping the prototype check
4539 */
4540 if (exists || SvPOK(cv))
01ec43d0 4541 cv_ckproto(cv, gv, ps);
68dc0745 4542 /* already defined (or promised)? */
60ed1d8c 4543 if (exists || GvASSUMECV(gv)) {
09bef843 4544 if (!block && !attrs) {
aa689395 4545 /* just a "sub foo;" when &foo is already defined */
3280af22 4546 SAVEFREESV(PL_compcv);
aa689395 4547 goto done;
4548 }
7bac28a0 4549 /* ahem, death to those who redefine active sort subs */
3280af22 4550 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4551 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
beab0874
JT		 4552 if (block) {
4553 if (ckWARN(WARN_REDEFINE)
4554 || (CvCONST(cv)
4555 && (!const_sv || sv_cmp(cv_const_sv(cv), const_sv))))
4556 {
4557 line_t oldline = CopLINE(PL_curcop);
4558 CopLINE_set(PL_curcop, PL_copline);
4559 Perl_warner(aTHX_ WARN_REDEFINE,
4560 CvCONST(cv) ? "Constant subroutine %s redefined"
4561 : "Subroutine %s redefined", name);
4562 CopLINE_set(PL_curcop, oldline);
4563 }
4564 SvREFCNT_dec(cv);
4565 cv = Nullcv;
79072805 4566 }
79072805
LW		 4567 }
4568 }
beab0874
JT		 4569 if (const_sv) {
4570 SvREFCNT_inc(const_sv);
4571 if (cv) {
4572 cv_undef(cv);
fcae944a
HS		 4573#ifdef USE_THREADS
4574 New(666, CvMUTEXP(cv), 1, perl_mutex);
4575 MUTEX_INIT(CvMUTEXP(cv));
4576 CvOWNER(cv) = 0;
4577#endif /* USE_THREADS */
beab0874
JT		 4578 sv_setpv((SV*)cv, ""); /* prototype is "" */
4579 CvXSUBANY(cv).any_ptr = const_sv;
4580 CvXSUB(cv) = const_sv_xsub;
4581 CvCONST_on(cv);
4582 /* XXX Does anybody care that CvFILE(cv) is blank? */
4583 }
4584 else {
4585 GvCV(gv) = Nullcv;
4586 cv = newCONSTSUB(NULL, name, const_sv);
4587 }
4588 op_free(block);
4589 SvREFCNT_dec(PL_compcv);
4590 PL_compcv = NULL;
4591 PL_sub_generation++;
4592 goto done;
4593 }
09bef843
SB		 4594 if (attrs) {
4595 HV *stash;
4596 SV *rcv;
4597
4598 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4599 * before we clobber PL_compcv.
4600 */
4601 if (cv && !block) {
4602 rcv = (SV*)cv;
4603 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4604 stash = GvSTASH(CvGV(cv));
4605 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4606 stash = CvSTASH(cv);
4607 else
4608 stash = PL_curstash;
4609 }
4610 else {
4611 /* possibly about to re-define existing subr -- ignore old cv */
4612 rcv = (SV*)PL_compcv;
4613 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4614 stash = GvSTASH(gv);
4615 else
4616 stash = PL_curstash;
4617 }
4618 apply_attrs(stash, rcv, attrs);
4619 }
a0d0e21e 4620 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4621 if (!block) {
4622 /* got here with just attrs -- work done, so bug out */
4623 SAVEFREESV(PL_compcv);
4624 goto done;
4625 }
4633a7c4 4626 cv_undef(cv);
3280af22
NIS		 4627 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4628 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4629 CvOUTSIDE(PL_compcv) = 0;
4630 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4631 CvPADLIST(PL_compcv) = 0;
4632 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4633 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4634 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4635 }
4636 else {
3280af22 4637 cv = PL_compcv;
44a8e56a 4638 if (name) {
4639 GvCV(gv) = cv;
4640 GvCVGEN(gv) = 0;
3280af22 4641 PL_sub_generation++;
44a8e56a 4642 }
a0d0e21e 4643 }
44a8e56a 4644 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4645 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4646 CvSTASH(cv) = PL_curstash;
11343788
MB		 4647#ifdef USE_THREADS
4648 CvOWNER(cv) = 0;
1cfa4ec7 4649 if (!CvMUTEXP(cv)) {
f6aaf501 4650 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4651 MUTEX_INIT(CvMUTEXP(cv));
4652 }
11343788 4653#endif /* USE_THREADS */
8990e307 4654
3fe9a6f1 4655 if (ps)
4656 sv_setpv((SV*)cv, ps);
4633a7c4 4657
3280af22 4658 if (PL_error_count) {
c07a80fd 4659 op_free(block);
4660 block = Nullop;
68dc0745 4661 if (name) {
4662 char *s = strrchr(name, ':');
4663 s = s ? s+1 : name;
6d4c2119
CS		 4664 if (strEQ(s, "BEGIN")) {
4665 char *not_safe =
4666 "BEGIN not safe after errors--compilation aborted";
faef0170 4667 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4668 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4669 else {
4670 /* force display of errors found but not reported */
38a03e6e 4671 sv_catpv(ERRSV, not_safe);
cea2e8a9 4672 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4673 }
4674 }
68dc0745 4675 }
c07a80fd 4676 }
beab0874
JT		 4677 if (!block)
4678 goto done;
a0d0e21e 4679
3280af22
NIS		 4680 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4681 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4682
7766f137
GS		 4683 if (CvLVALUE(cv)) {
4684 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4685 }
4686 else {
4687 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4688 }
4689 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4690 OpREFCNT_set(CvROOT(cv), 1);
4691 CvSTART(cv) = LINKLIST(CvROOT(cv));
4692 CvROOT(cv)->op_next = 0;
4693 peep(CvSTART(cv));
4694
4695 /* now that optimizer has done its work, adjust pad values */
54310121 4696 if (CvCLONE(cv)) {
3280af22
NIS		 4697 SV **namep = AvARRAY(PL_comppad_name);
4698 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4699 SV *namesv;
4700
7766f137 4701 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4702 continue;
4703 /*
4704 * The only things that a clonable function needs in its
4705 * pad are references to outer lexicals and anonymous subs.
4706 * The rest are created anew during cloning.
4707 */
4708 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4709 namesv != &PL_sv_undef &&
54310121 4710 (SvFAKE(namesv) ||
4711 *SvPVX(namesv) == '&')))
4712 {
3280af22
NIS		 4713 SvREFCNT_dec(PL_curpad[ix]);
4714 PL_curpad[ix] = Nullsv;
54310121 4715 }
4716 }
beab0874
JT		 4717 assert(!CvCONST(cv));
4718 if (ps && !*ps && op_const_sv(block, cv))
4719 CvCONST_on(cv);
a0d0e21e 4720 }
54310121 4721 else {
4722 AV *av = newAV(); /* Will be @_ */
4723 av_extend(av, 0);
3280af22 4724 av_store(PL_comppad, 0, (SV*)av);
54310121 4725 AvFLAGS(av) = AVf_REIFY;
79072805 4726
3280af22 4727 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4728 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4729 continue;
3280af22
NIS		 4730 if (!SvPADMY(PL_curpad[ix]))
4731 SvPADTMP_on(PL_curpad[ix]);
54310121 4732 }
4733 }
79072805 4734
83ee9e09 4735 if (name || aname) {
44a8e56a 4736 char *s;
83ee9e09 4737 char *tname = (name ? name : aname);
44a8e56a 4738
3280af22 4739 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4740 SV *sv = NEWSV(0,0);
44a8e56a 4741 SV *tmpstr = sv_newmortal();
549bb64a 4742 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4743 CV *pcv;
44a8e56a 4744 HV *hv;
4745
ed094faf
GS		 4746 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4747 CopFILE(PL_curcop),
cc49e20b 4748 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4749 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4750 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4751 hv = GvHVn(db_postponed);
9607fc9c 4752 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4753 && (pcv = GvCV(db_postponed)))
4754 {
44a8e56a 4755 dSP;
924508f0 4756 PUSHMARK(SP);
44a8e56a 4757 XPUSHs(tmpstr);
4758 PUTBACK;
83ee9e09 4759 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4760 }
4761 }
79072805 4762
83ee9e09 4763 if ((s = strrchr(tname,':')))
28757baa 4764 s++;
4765 else
83ee9e09 4766 s = tname;
ed094faf 4767
7d30b5c4 4768 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4769 goto done;
4770
68dc0745 4771 if (strEQ(s, "BEGIN")) {
3280af22 4772 I32 oldscope = PL_scopestack_ix;
28757baa 4773 ENTER;
57843af0
GS		 4774 SAVECOPFILE(&PL_compiling);
4775 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4776 save_svref(&PL_rs);
4777 sv_setsv(PL_rs, PL_nrs);
28757baa 4778
3280af22
NIS		 4779 if (!PL_beginav)
4780 PL_beginav = newAV();
28757baa 4781 DEBUG_x( dump_sub(gv) );
ea2f84a3
GS		 4782 av_push(PL_beginav, (SV*)cv);
4783 GvCV(gv) = 0; /* cv has been hijacked */
3280af22 4784 call_list(oldscope, PL_beginav);
a6006777 4785
3280af22 4786 PL_curcop = &PL_compiling;
a0ed51b3 4787 PL_compiling.op_private = PL_hints;
28757baa 4788 LEAVE;
4789 }
3280af22
NIS		 4790 else if (strEQ(s, "END") && !PL_error_count) {
4791 if (!PL_endav)
4792 PL_endav = newAV();
ed094faf 4793 DEBUG_x( dump_sub(gv) );
3280af22 4794 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4795 av_store(PL_endav, 0, (SV*)cv);
4796 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4797 }
7d30b5c4
GS		 4798 else if (strEQ(s, "CHECK") && !PL_error_count) {
4799 if (!PL_checkav)
4800 PL_checkav = newAV();
ed094faf 4801 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4802 if (PL_main_start && ckWARN(WARN_VOID))
4803 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4804 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4805 av_store(PL_checkav, 0, (SV*)cv);
4806 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4807 }
3280af22
NIS		 4808 else if (strEQ(s, "INIT") && !PL_error_count) {
4809 if (!PL_initav)
4810 PL_initav = newAV();
ed094faf 4811 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4812 if (PL_main_start && ckWARN(WARN_VOID))
4813 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4814 av_push(PL_initav, (SV*)cv);
4815 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4816 }
79072805 4817 }
a6006777 4818
aa689395 4819 done:
3280af22 4820 PL_copline = NOLINE;
8990e307 4821 LEAVE_SCOPE(floor);
a0d0e21e 4822 return cv;
79072805
LW		 4823}
4824
b099ddc0 4825/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4826/*
4827=for apidoc newCONSTSUB
4828
4829Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4830eligible for inlining at compile-time.
4831
4832=cut
4833*/
4834
beab0874 4835CV *
864dbfa3 4836Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4837{
4838 dTHR;
beab0874 4839 CV* cv;
5476c433 4840
11faa288 4841 ENTER;
11faa288 4842
f4dd75d9 4843 SAVECOPLINE(PL_curcop);
11faa288 4844 CopLINE_set(PL_curcop, PL_copline);
f4dd75d9
GS		 4845
4846 SAVEHINTS();
3280af22 4847 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4848
4849 if (stash) {
4850 SAVESPTR(PL_curstash);
4851 SAVECOPSTASH(PL_curcop);
4852 PL_curstash = stash;
4853#ifdef USE_ITHREADS
4854 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4855#else
4856 CopSTASH(PL_curcop) = stash;
4857#endif
4858 }
5476c433 4859
beab0874
JT		 4860 cv = newXS(name, const_sv_xsub, __FILE__);
4861 CvXSUBANY(cv).any_ptr = sv;
4862 CvCONST_on(cv);
4863 sv_setpv((SV*)cv, ""); /* prototype is "" */
5476c433 4864
11faa288 4865 LEAVE;
beab0874
JT		 4866
4867 return cv;
5476c433
JD		 4868}
4869
954c1994
GS		 4870/*
4871=for apidoc U||newXS
4872
4873Used by C<xsubpp> to hook up XSUBs as Perl subs.
4874
4875=cut
4876*/
4877
57d3b86d 4878CV *
864dbfa3 4879Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4880{
11343788 4881 dTHR;
44a8e56a 4882 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4883 register CV *cv;
44a8e56a 4884
155aba94 4885 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4886 if (GvCVGEN(gv)) {
4887 /* just a cached method */
4888 SvREFCNT_dec(cv);
4889 cv = 0;
4890 }
4891 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4892 /* already defined (or promised) */
599cee73 4893 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4894 && HvNAME(GvSTASH(CvGV(cv)))
4895 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4896 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4897 if (PL_copline != NOLINE)
57843af0 4898 CopLINE_set(PL_curcop, PL_copline);
beab0874
JT		 4899 Perl_warner(aTHX_ WARN_REDEFINE,
4900 CvCONST(cv) ? "Constant subroutine %s redefined"
4901 : "Subroutine %s redefined"
4902 ,name);
57843af0 4903 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4904 }
4905 SvREFCNT_dec(cv);
4906 cv = 0;
79072805 4907 }
79072805 4908 }
44a8e56a 4909
4910 if (cv) /* must reuse cv if autoloaded */
4911 cv_undef(cv);
a0d0e21e
LW		 4912 else {
4913 cv = (CV*)NEWSV(1105,0);
4914 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4915 if (name) {
4916 GvCV(gv) = cv;
4917 GvCVGEN(gv) = 0;
3280af22 4918 PL_sub_generation++;
44a8e56a 4919 }
a0d0e21e 4920 }
5196be3e 4921 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4922#ifdef USE_THREADS
12ca11f6 4923 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4924 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4925 CvOWNER(cv) = 0;
4926#endif /* USE_THREADS */
b195d487 4927 (void)gv_fetchfile(filename);
57843af0
GS		 4928 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4929 an external constant string */
a0d0e21e 4930 CvXSUB(cv) = subaddr;
44a8e56a 4931
28757baa 4932 if (name) {
4933 char *s = strrchr(name,':');
4934 if (s)
4935 s++;
4936 else
4937 s = name;
ed094faf 4938
7d30b5c4 4939 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4940 goto done;
4941
28757baa 4942 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4943 if (!PL_beginav)
4944 PL_beginav = newAV();
ea2f84a3
GS		 4945 av_push(PL_beginav, (SV*)cv);
4946 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4947 }
4948 else if (strEQ(s, "END")) {
3280af22
NIS		 4949 if (!PL_endav)
4950 PL_endav = newAV();
4951 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4952 av_store(PL_endav, 0, (SV*)cv);
4953 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4954 }
7d30b5c4
GS		 4955 else if (strEQ(s, "CHECK")) {
4956 if (!PL_checkav)
4957 PL_checkav = newAV();
ddda08b7
GS		 4958 if (PL_main_start && ckWARN(WARN_VOID))
4959 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4960 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4961 av_store(PL_checkav, 0, (SV*)cv);
4962 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4963 }
7d07dbc2 4964 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4965 if (!PL_initav)
4966 PL_initav = newAV();
ddda08b7
GS		 4967 if (PL_main_start && ckWARN(WARN_VOID))
4968 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4969 av_push(PL_initav, (SV*)cv);
4970 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4971 }
28757baa 4972 }
8990e307 4973 else
a5f75d66 4974 CvANON_on(cv);
44a8e56a 4975
ed094faf 4976done:
a0d0e21e 4977 return cv;
79072805
LW		 4978}
4979
4980void
864dbfa3 4981Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4982{
11343788 4983 dTHR;
79072805
LW		 4984 register CV *cv;
4985 char *name;
4986 GV *gv;
a0d0e21e 4987 I32 ix;
2d8e6c8d 4988 STRLEN n_a;
79072805 4989
11343788 4990 if (o)
2d8e6c8d 4991 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4992 else
4993 name = "STDOUT";
85e6fe83 4994 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4995 GvMULTI_on(gv);
155aba94 4996 if ((cv = GvFORM(gv))) {
599cee73 4997 if (ckWARN(WARN_REDEFINE)) {
57843af0 4998 line_t oldline = CopLINE(PL_curcop);
79072805 4999
57843af0 5000 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 5001 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 5002 CopLINE_set(PL_curcop, oldline);
79072805 5003 }
8990e307 5004 SvREFCNT_dec(cv);
79072805 5005 }
3280af22 5006 cv = PL_compcv;
79072805 5007 GvFORM(gv) = cv;
44a8e56a 5008 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 5009 CvFILE(cv) = CopFILE(PL_curcop);
79072805 5010
3280af22
NIS		 5011 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
5012 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
5013 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 5014 }
5015
79072805 5016 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 5017 CvROOT(cv)->op_private |= OPpREFCOUNTED;
5018 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 5019 CvSTART(cv) = LINKLIST(CvROOT(cv));
5020 CvROOT(cv)->op_next = 0;
5021 peep(CvSTART(cv));
11343788 5022 op_free(o);
3280af22 5023 PL_copline = NOLINE;
8990e307 5024 LEAVE_SCOPE(floor);
79072805
LW		 5025}
5026
5027OP *
864dbfa3 5028Perl_newANONLIST(pTHX_ OP *o)
79072805 5029{
93a17b20 5030 return newUNOP(OP_REFGEN, 0,
11343788 5031 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 5032}
5033
5034OP *
864dbfa3 5035Perl_newANONHASH(pTHX_ OP *o)
79072805 5036{
93a17b20 5037 return newUNOP(OP_REFGEN, 0,
11343788 5038 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 5039}
5040
5041OP *
864dbfa3 5042Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 5043{
09bef843
SB		 5044 return newANONATTRSUB(floor, proto, Nullop, block);
5045}
5046
5047OP *
5048Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
5049{
a0d0e21e 5050 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 5051 newSVOP(OP_ANONCODE, 0,
5052 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 5053}
5054
5055OP *
864dbfa3 5056Perl_oopsAV(pTHX_ OP *o)
79072805 5057{
ed6116ce
LW		 5058 switch (o->op_type) {
5059 case OP_PADSV:
5060 o->op_type = OP_PADAV;
22c35a8c 5061 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 5062 return ref(o, OP_RV2AV);
ed6116ce
LW		 5063
5064 case OP_RV2SV:
79072805 5065 o->op_type = OP_RV2AV;
22c35a8c 5066 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 5067 ref(o, OP_RV2AV);
ed6116ce
LW		 5068 break;
5069
5070 default:
0453d815
PM		 5071 if (ckWARN_d(WARN_INTERNAL))
5072 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 5073 break;
5074 }
79072805
LW		 5075 return o;
5076}
5077
5078OP *
864dbfa3 5079Perl_oopsHV(pTHX_ OP *o)
79072805 5080{
0453d815 5081 dTHR;
1c846c1f 5082
ed6116ce
LW		 5083 switch (o->op_type) {
5084 case OP_PADSV:
5085 case OP_PADAV:
5086 o->op_type = OP_PADHV;
22c35a8c 5087 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 5088 return ref(o, OP_RV2HV);
ed6116ce
LW		 5089
5090 case OP_RV2SV:
5091 case OP_RV2AV:
79072805 5092 o->op_type = OP_RV2HV;
22c35a8c 5093 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 5094 ref(o, OP_RV2HV);
ed6116ce
LW		 5095 break;
5096
5097 default:
0453d815
PM		 5098 if (ckWARN_d(WARN_INTERNAL))
5099 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 5100 break;
5101 }
79072805
LW		 5102 return o;
5103}
5104
5105OP *
864dbfa3 5106Perl_newAVREF(pTHX_ OP *o)
79072805 5107{
ed6116ce
LW		 5108 if (o->op_type == OP_PADANY) {
5109 o->op_type = OP_PADAV;
22c35a8c 5110 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 5111 return o;
ed6116ce 5112 }
79072805
LW		 5113 return newUNOP(OP_RV2AV, 0, scalar(o));
5114}
5115
5116OP *
864dbfa3 5117Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 5118{
82092f1d 5119 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 5120 return newUNOP(OP_NULL, 0, o);
748a9306 5121 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 5122}
5123
5124OP *
864dbfa3 5125Perl_newHVREF(pTHX_ OP *o)
79072805 5126{
ed6116ce
LW		 5127 if (o->op_type == OP_PADANY) {
5128 o->op_type = OP_PADHV;
22c35a8c 5129 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 5130 return o;
ed6116ce 5131 }
79072805
LW		 5132 return newUNOP(OP_RV2HV, 0, scalar(o));
5133}
5134
5135OP *
864dbfa3 5136Perl_oopsCV(pTHX_ OP *o)
79072805 5137{
cea2e8a9 5138 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5139 /* STUB */
5140 return o;
5141}
5142
5143OP *
864dbfa3 5144Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5145{
c07a80fd 5146 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5147}
5148
5149OP *
864dbfa3 5150Perl_newSVREF(pTHX_ OP *o)
79072805 5151{
ed6116ce
LW		 5152 if (o->op_type == OP_PADANY) {
5153 o->op_type = OP_PADSV;
22c35a8c 5154 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5155 return o;
ed6116ce 5156 }
224a4551
MB		 5157 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5158 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5159 return o;
224a4551 5160 }
79072805
LW		 5161 return newUNOP(OP_RV2SV, 0, scalar(o));
5162}
5163
5164/* Check routines. */
5165
5166OP *
cea2e8a9 5167Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5168{
178c6305
CS		 5169 PADOFFSET ix;
5170 SV* name;
5171
5172 name = NEWSV(1106,0);
5173 sv_upgrade(name, SVt_PVNV);
5174 sv_setpvn(name, "&", 1);
5175 SvIVX(name) = -1;
5176 SvNVX(name) = 1;
5dc0d613 5177 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5178 av_store(PL_comppad_name, ix, name);
5179 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5180 SvPADMY_on(cSVOPo->op_sv);
5181 cSVOPo->op_sv = Nullsv;
5182 cSVOPo->op_targ = ix;
5183 return o;
5f05dabc 5184}
5185
5186OP *
cea2e8a9 5187Perl_ck_bitop(pTHX_ OP *o)
55497cff 5188{
3280af22 5189 o->op_private = PL_hints;
5dc0d613 5190 return o;
55497cff 5191}
5192
5193OP *
cea2e8a9 5194Perl_ck_concat(pTHX_ OP *o)
79072805 5195{
11343788
MB		 5196 if (cUNOPo->op_first->op_type == OP_CONCAT)
5197 o->op_flags |= OPf_STACKED;
5198 return o;
79072805
LW		 5199}
5200
5201OP *
cea2e8a9 5202Perl_ck_spair(pTHX_ OP *o)
79072805 5203{
11343788 5204 if (o->op_flags & OPf_KIDS) {
79072805 5205 OP* newop;
a0d0e21e 5206 OP* kid;
5dc0d613
MB		 5207 OPCODE type = o->op_type;
5208 o = modkids(ck_fun(o), type);
11343788 5209 kid = cUNOPo->op_first;
a0d0e21e
LW		 5210 newop = kUNOP->op_first->op_sibling;
5211 if (newop &&
5212 (newop->op_sibling ||
22c35a8c 5213 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5214 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5215 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5216
11343788 5217 return o;
a0d0e21e
LW		 5218 }
5219 op_free(kUNOP->op_first);
5220 kUNOP->op_first = newop;
5221 }
22c35a8c 5222 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5223 return ck_fun(o);
a0d0e21e
LW		 5224}
5225
5226OP *
cea2e8a9 5227Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5228{
11343788 5229 o = ck_fun(o);
5dc0d613 5230 o->op_private = 0;
11343788
MB		 5231 if (o->op_flags & OPf_KIDS) {
5232 OP *kid = cUNOPo->op_first;
01020589
GS		 5233 switch (kid->op_type) {
5234 case OP_ASLICE:
5235 o->op_flags |= OPf_SPECIAL;
5236 /* FALL THROUGH */
5237 case OP_HSLICE:
5dc0d613 5238 o->op_private |= OPpSLICE;
01020589
GS		 5239 break;
5240 case OP_AELEM:
5241 o->op_flags |= OPf_SPECIAL;
5242 /* FALL THROUGH */
5243 case OP_HELEM:
5244 break;
5245 default:
5246 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5247 PL_op_desc[o->op_type]);
01020589 5248 }
a0d0e21e 5249 null(kid);
79072805 5250 }
11343788 5251 return o;
79072805
LW		 5252}
5253
5254OP *
cea2e8a9 5255Perl_ck_eof(pTHX_ OP *o)
79072805 5256{
11343788 5257 I32 type = o->op_type;
79072805 5258
11343788
MB		 5259 if (o->op_flags & OPf_KIDS) {
5260 if (cLISTOPo->op_first->op_type == OP_STUB) {
5261 op_free(o);
5262 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5263 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5264 }
11343788 5265 return ck_fun(o);
79072805 5266 }
11343788 5267 return o;
79072805
LW		 5268}
5269
5270OP *
cea2e8a9 5271Perl_ck_eval(pTHX_ OP *o)
79072805 5272{
3280af22 5273 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5274 if (o->op_flags & OPf_KIDS) {
5275 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5276
93a17b20 5277 if (!kid) {
11343788
MB		 5278 o->op_flags &= ~OPf_KIDS;
5279 null(o);
79072805
LW		 5280 }
5281 else if (kid->op_type == OP_LINESEQ) {
5282 LOGOP *enter;
5283
11343788
MB		 5284 kid->op_next = o->op_next;
5285 cUNOPo->op_first = 0;
5286 op_free(o);
79072805 5287
b7dc083c 5288 NewOp(1101, enter, 1, LOGOP);
79072805 5289 enter->op_type = OP_ENTERTRY;
22c35a8c 5290 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5291 enter->op_private = 0;
5292
5293 /* establish postfix order */
5294 enter->op_next = (OP*)enter;
5295
11343788
MB		 5296 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5297 o->op_type = OP_LEAVETRY;
22c35a8c 5298 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5299 enter->op_other = o;
5300 return o;
79072805 5301 }
c7cc6f1c 5302 else
473986ff 5303 scalar((OP*)kid);
79072805
LW		 5304 }
5305 else {
11343788 5306 op_free(o);
54b9620d 5307 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5308 }
3280af22 5309 o->op_targ = (PADOFFSET)PL_hints;
11343788 5310 return o;
79072805
LW		 5311}
5312
5313OP *
d98f61e7
GS		 5314Perl_ck_exit(pTHX_ OP *o)
5315{
5316#ifdef VMS
5317 HV *table = GvHV(PL_hintgv);
5318 if (table) {
5319 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5320 if (svp && *svp && SvTRUE(*svp))
5321 o->op_private |= OPpEXIT_VMSISH;
5322 }
5323#endif
5324 return ck_fun(o);
5325}
5326
5327OP *
cea2e8a9 5328Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5329{
5330 OP *kid;
11343788
MB		 5331 if (o->op_flags & OPf_STACKED) {
5332 o = ck_fun(o);
5333 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5334 if (kid->op_type == OP_RV2GV)
5335 null(kid);
79072805 5336 }
463ee0b2 5337 else
11343788
MB		 5338 o = listkids(o);
5339 return o;
79072805
LW		 5340}
5341
5342OP *
cea2e8a9 5343Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5344{
5196be3e
MB		 5345 o = ck_fun(o);
5346 if (o->op_flags & OPf_KIDS) {
5347 OP *kid = cUNOPo->op_first;
afebc493
GS		 5348 if (kid->op_type == OP_ENTERSUB) {
5349 (void) ref(kid, o->op_type);
5350 if (kid->op_type != OP_RV2CV && !PL_error_count)
5351 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5352 PL_op_desc[o->op_type]);
5353 o->op_private |= OPpEXISTS_SUB;
5354 }
5355 else if (kid->op_type == OP_AELEM)
01020589
GS		 5356 o->op_flags |= OPf_SPECIAL;
5357 else if (kid->op_type != OP_HELEM)
5358 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5359 PL_op_desc[o->op_type]);
5f05dabc 5360 null(kid);
5361 }
5196be3e 5362 return o;
5f05dabc 5363}
5364
22c35a8c 5365#if 0
5f05dabc 5366OP *
cea2e8a9 5367Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5368{
5369 o = fold_constants(o);
5370 if (o->op_type == OP_CONST)
5371 o->op_type = OP_GV;
5372 return o;
5373}
22c35a8c 5374#endif
79072805
LW		 5375
5376OP *
cea2e8a9 5377Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5378{
11343788
MB		 5379 dTHR;
5380 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5381
3280af22 5382 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5383 if (kid->op_type == OP_CONST) {
44a8e56a 5384 char *name;
5385 int iscv;
5386 GV *gv;
779c5bc9 5387 SV *kidsv = kid->op_sv;
2d8e6c8d 5388 STRLEN n_a;
44a8e56a 5389
779c5bc9
GS		 5390 /* Is it a constant from cv_const_sv()? */
5391 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5392 SV *rsv = SvRV(kidsv);
5393 int svtype = SvTYPE(rsv);
5394 char *badtype = Nullch;
5395
5396 switch (o->op_type) {
5397 case OP_RV2SV:
5398 if (svtype > SVt_PVMG)
5399 badtype = "a SCALAR";
5400 break;
5401 case OP_RV2AV:
5402 if (svtype != SVt_PVAV)
5403 badtype = "an ARRAY";
5404 break;
5405 case OP_RV2HV:
5406 if (svtype != SVt_PVHV) {
5407 if (svtype == SVt_PVAV) { /* pseudohash? */
5408 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5409 if (ksv && SvROK(*ksv)
5410 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5411 {
5412 break;
5413 }
5414 }
5415 badtype = "a HASH";
5416 }
5417 break;
5418 case OP_RV2CV:
5419 if (svtype != SVt_PVCV)
5420 badtype = "a CODE";
5421 break;
5422 }
5423 if (badtype)
cea2e8a9 5424 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5425 return o;
5426 }
2d8e6c8d 5427 name = SvPV(kidsv, n_a);
3280af22 5428 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5429 char *badthing = Nullch;
5dc0d613 5430 switch (o->op_type) {
44a8e56a 5431 case OP_RV2SV:
5432 badthing = "a SCALAR";
5433 break;
5434 case OP_RV2AV:
5435 badthing = "an ARRAY";
5436 break;
5437 case OP_RV2HV:
5438 badthing = "a HASH";
5439 break;
5440 }
5441 if (badthing)
1c846c1f 5442 Perl_croak(aTHX_
44a8e56a 5443 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5444 name, badthing);
5445 }
93233ece
CS		 5446 /*
5447 * This is a little tricky. We only want to add the symbol if we
5448 * didn't add it in the lexer. Otherwise we get duplicate strict
5449 * warnings. But if we didn't add it in the lexer, we must at
5450 * least pretend like we wanted to add it even if it existed before,
5451 * or we get possible typo warnings. OPpCONST_ENTERED says
5452 * whether the lexer already added THIS instance of this symbol.
5453 */
5196be3e 5454 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5455 do {
44a8e56a 5456 gv = gv_fetchpv(name,
748a9306 5457 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5458 iscv
5459 ? SVt_PVCV
11343788 5460 : o->op_type == OP_RV2SV
a0d0e21e 5461 ? SVt_PV
11343788 5462 : o->op_type == OP_RV2AV
a0d0e21e 5463 ? SVt_PVAV
11343788 5464 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5465 ? SVt_PVHV
5466 : SVt_PVGV);
93233ece
CS		 5467 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5468 if (gv) {
5469 kid->op_type = OP_GV;
5470 SvREFCNT_dec(kid->op_sv);
350de78d 5471#ifdef USE_ITHREADS
638eceb6 5472 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5473 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
63caf608 5474 SvREFCNT_dec(PL_curpad[kPADOP->op_padix]);
743e66e6 5475 GvIN_PAD_on(gv);
350de78d
GS		 5476 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5477#else
93233ece 5478 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5479#endif
76cd736e 5480 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5481 }
79072805 5482 }
11343788 5483 return o;
79072805
LW		 5484}
5485
5486OP *
cea2e8a9 5487Perl_ck_ftst(pTHX_ OP *o)
79072805 5488{
11343788
MB		 5489 dTHR;
5490 I32 type = o->op_type;
79072805 5491
d0dca557
JD		 5492 if (o->op_flags & OPf_REF) {
5493 /* nothing */
5494 }
5495 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5496 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5497
5498 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5499 STRLEN n_a;
a0d0e21e 5500 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5501 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5502 op_free(o);
d0dca557 5503 o = newop;
79072805
LW		 5504 }
5505 }
5506 else {
11343788 5507 op_free(o);
79072805 5508 if (type == OP_FTTTY)
d0dca557 5509 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5510 SVt_PVIO));
79072805 5511 else
d0dca557 5512 o = newUNOP(type, 0, newDEFSVOP());
79072805 5513 }
d0dca557
JD		 5514#ifdef USE_LOCALE
5515 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5516 o->op_private = 0;
5517 if (PL_hints & HINT_LOCALE)
5518 o->op_private |= OPpLOCALE;
5519 }
5520#endif
11343788 5521 return o;
79072805
LW		 5522}
5523
5524OP *
cea2e8a9 5525Perl_ck_fun(pTHX_ OP *o)
79072805 5526{
11343788 5527 dTHR;
79072805
LW		 5528 register OP *kid;
5529 OP **tokid;
5530 OP *sibl;
5531 I32 numargs = 0;
11343788 5532 int type = o->op_type;
22c35a8c 5533 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5534
11343788 5535 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5536 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5537 oa &= ~OA_OPTIONAL;
5538 else
11343788 5539 return no_fh_allowed(o);
79072805
LW		 5540 }
5541
11343788 5542 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5543 STRLEN n_a;
11343788
MB		 5544 tokid = &cLISTOPo->op_first;
5545 kid = cLISTOPo->op_first;
8990e307 5546 if (kid->op_type == OP_PUSHMARK ||
155aba94 5547 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5548 {
79072805
LW		 5549 tokid = &kid->op_sibling;
5550 kid = kid->op_sibling;
5551 }
22c35a8c 5552 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5553 *tokid = kid = newDEFSVOP();
79072805
LW		 5554
5555 while (oa && kid) {
5556 numargs++;
5557 sibl = kid->op_sibling;
5558 switch (oa & 7) {
5559 case OA_SCALAR:
62c18ce2
GS		 5560 /* list seen where single (scalar) arg expected? */
5561 if (numargs == 1 && !(oa >> 4)
5562 && kid->op_type == OP_LIST && type != OP_SCALAR)
5563 {
5564 return too_many_arguments(o,PL_op_desc[type]);
5565 }
79072805
LW		 5566 scalar(kid);
5567 break;
5568 case OA_LIST:
5569 if (oa < 16) {
5570 kid = 0;
5571 continue;
5572 }
5573 else
5574 list(kid);
5575 break;
5576 case OA_AVREF:
5577 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5578 (kid->op_private & OPpCONST_BARE))
5579 {
2d8e6c8d 5580 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5581 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5582 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5583 if (ckWARN(WARN_DEPRECATED))
5584 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5585 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5586 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5587 op_free(kid);
5588 kid = newop;
5589 kid->op_sibling = sibl;
5590 *tokid = kid;
5591 }
8990e307 5592 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5593 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5594 mod(kid, type);
79072805
LW		 5595 break;
5596 case OA_HVREF:
5597 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5598 (kid->op_private & OPpCONST_BARE))
5599 {
2d8e6c8d 5600 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5601 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5602 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5603 if (ckWARN(WARN_DEPRECATED))
5604 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5605 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5606 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5607 op_free(kid);
5608 kid = newop;
5609 kid->op_sibling = sibl;
5610 *tokid = kid;
5611 }
8990e307 5612 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5613 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5614 mod(kid, type);
79072805
LW		 5615 break;
5616 case OA_CVREF:
5617 {
a0d0e21e 5618 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5619 kid->op_sibling = 0;
5620 linklist(kid);
5621 newop->op_next = newop;
5622 kid = newop;
5623 kid->op_sibling = sibl;
5624 *tokid = kid;
5625 }
5626 break;
5627 case OA_FILEREF:
c340be78 5628 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5629 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5630 (kid->op_private & OPpCONST_BARE))
5631 {
79072805 5632 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5633 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5634 SVt_PVIO) );
79072805
LW		 5635 op_free(kid);
5636 kid = newop;
5637 }
1ea32a52
GS		 5638 else if (kid->op_type == OP_READLINE) {
5639 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5640 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5641 }
79072805 5642 else {
35cd451c 5643 I32 flags = OPf_SPECIAL;
a6c40364 5644 I32 priv = 0;
2c8ac474
GS		 5645 PADOFFSET targ = 0;
5646
35cd451c 5647 /* is this op a FH constructor? */
853846ea 5648 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5649 char *name = Nullch;
5650 STRLEN len;
5651
5652 flags = 0;
5653 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5654 * need to "prove" flag does not mean something
5655 * else already - NI-S 1999/05/07
2c8ac474
GS		 5656 */
5657 priv = OPpDEREF;
5658 if (kid->op_type == OP_PADSV) {
5659 SV **namep = av_fetch(PL_comppad_name,
5660 kid->op_targ, 4);
5661 if (namep && *namep)
5662 name = SvPV(*namep, len);
5663 }
5664 else if (kid->op_type == OP_RV2SV
5665 && kUNOP->op_first->op_type == OP_GV)
5666 {
5667 GV *gv = cGVOPx_gv(kUNOP->op_first);
5668 name = GvNAME(gv);
5669 len = GvNAMELEN(gv);
5670 }
afd1915d
GS		 5671 else if (kid->op_type == OP_AELEM
5672 || kid->op_type == OP_HELEM)
5673 {
5674 name = "__ANONIO__";
5675 len = 10;
5676 mod(kid,type);
5677 }
2c8ac474
GS		 5678 if (name) {
5679 SV *namesv;
5680 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5681 namesv = PL_curpad[targ];
155aba94 5682 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5683 if (*name != '$')
5684 sv_setpvn(namesv, "$", 1);
5685 sv_catpvn(namesv, name, len);
5686 }
853846ea 5687 }
79072805 5688 kid->op_sibling = 0;
35cd451c 5689 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5690 kid->op_targ = targ;
5691 kid->op_private |= priv;
79072805
LW		 5692 }
5693 kid->op_sibling = sibl;
5694 *tokid = kid;
5695 }
5696 scalar(kid);
5697 break;
5698 case OA_SCALARREF:
a0d0e21e 5699 mod(scalar(kid), type);
79072805
LW		 5700 break;
5701 }
5702 oa >>= 4;
5703 tokid = &kid->op_sibling;
5704 kid = kid->op_sibling;
5705 }
11343788 5706 o->op_private |= numargs;
79072805 5707 if (kid)
22c35a8c 5708 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5709 listkids(o);
79072805 5710 }
22c35a8c 5711 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5712 op_free(o);
54b9620d 5713 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5714 }
5715
79072805
LW		 5716 if (oa) {
5717 while (oa & OA_OPTIONAL)
5718 oa >>= 4;
5719 if (oa && oa != OA_LIST)
22c35a8c 5720 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5721 }
11343788 5722 return o;
79072805
LW		 5723}
5724
5725OP *
cea2e8a9 5726Perl_ck_glob(pTHX_ OP *o)
79072805 5727{
fb73857a 5728 GV *gv;
5729
649da076 5730 o = ck_fun(o);
1f2bfc8a 5731 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5732 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5733
5734 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5735 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5736
52bb0670 5737#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5738 /* XXX this can be tightened up and made more failsafe. */
5739 if (!gv) {
72b16652 5740 ENTER;
e4783991
GS		 5741 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5742 /* null-terminated import list */
5743 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5744 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5745 LEAVE;
5746 }
52bb0670 5747#endif /* PERL_EXTERNAL_GLOB */
72b16652 5748
b1cb66bf 5749 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5750 append_elem(OP_GLOB, o,
80252599 5751 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5752 o->op_type = OP_LIST;
22c35a8c 5753 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5754 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5755 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5756 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5757 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5758 scalar(newUNOP(OP_RV2CV, 0,
5759 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5760 o = newUNOP(OP_NULL, 0, ck_subr(o));
5761 o->op_targ = OP_GLOB; /* hint at what it used to be */
5762 return o;
b1cb66bf 5763 }
5764 gv = newGVgen("main");
a0d0e21e 5765 gv_IOadd(gv);
11343788
MB		 5766 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5767 scalarkids(o);
649da076 5768 return o;
79072805
LW		 5769}
5770
5771OP *
cea2e8a9 5772Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5773{
5774 LOGOP *gwop;
5775 OP *kid;
11343788 5776 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5777
22c35a8c 5778 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5779 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5780
11343788 5781 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5782 OP* k;
11343788
MB		 5783 o = ck_sort(o);
5784 kid = cLISTOPo->op_first->op_sibling;
5785 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5786 kid = k;
5787 }
5788 kid->op_next = (OP*)gwop;
11343788 5789 o->op_flags &= ~OPf_STACKED;
93a17b20 5790 }
11343788 5791 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5792 if (type == OP_MAPWHILE)
5793 list(kid);
5794 else
5795 scalar(kid);
11343788 5796 o = ck_fun(o);
3280af22 5797 if (PL_error_count)
11343788 5798 return o;
aeea060c 5799 kid = cLISTOPo->op_first->op_sibling;
79072805 5800 if (kid->op_type != OP_NULL)
cea2e8a9 5801 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5802 kid = kUNOP->op_first;
5803
a0d0e21e 5804 gwop->op_type = type;
22c35a8c 5805 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5806 gwop->op_first = listkids(o);
79072805
LW		 5807 gwop->op_flags |= OPf_KIDS;
5808 gwop->op_private = 1;
5809 gwop->op_other = LINKLIST(kid);
a0d0e21e 5810 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5811 kid->op_next = (OP*)gwop;
5812
11343788 5813 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5814 if (!kid || !kid->op_sibling)
22c35a8c 5815 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5816 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5817 mod(kid, OP_GREPSTART);
5818
79072805
LW		 5819 return (OP*)gwop;
5820}
5821
5822OP *
cea2e8a9 5823Perl_ck_index(pTHX_ OP *o)
79072805 5824{
11343788
MB		 5825 if (o->op_flags & OPf_KIDS) {
5826 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5827 if (kid)
5828 kid = kid->op_sibling; /* get past "big" */
79072805 5829 if (kid && kid->op_type == OP_CONST)
2779dcf1 5830 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5831 }
11343788 5832 return ck_fun(o);
79072805
LW		 5833}
5834
5835OP *
cea2e8a9 5836Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5837{
5838 /* XXX length optimization goes here */
11343788 5839 return ck_fun(o);
79072805
LW		 5840}
5841
5842OP *
cea2e8a9 5843Perl_ck_lfun(pTHX_ OP *o)
79072805 5844{
5dc0d613
MB		 5845 OPCODE type = o->op_type;
5846 return modkids(ck_fun(o), type);
79072805
LW		 5847}
5848
5849OP *
cea2e8a9 5850Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5851{
20ce7b12 5852 dTHR;
d0334bed
GS		 5853 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5854 switch (cUNOPo->op_first->op_type) {
5855 case OP_RV2AV:
a8739d98
JH		 5856 /* This is needed for
5857 if (defined %stash::)
5858 to work. Do not break Tk.
5859 */
1c846c1f 5860 break; /* Globals via GV can be undef */
d0334bed
GS		 5861 case OP_PADAV:
5862 case OP_AASSIGN: /* Is this a good idea? */
5863 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5864 "defined(@array) is deprecated");
d0334bed 5865 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5866 "\t(Maybe you should just omit the defined()?)\n");
69794302 5867 break;
d0334bed 5868 case OP_RV2HV:
a8739d98
JH		 5869 /* This is needed for
5870 if (defined %stash::)
5871 to work. Do not break Tk.
5872 */
1c846c1f 5873 break; /* Globals via GV can be undef */
d0334bed
GS		 5874 case OP_PADHV:
5875 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5876 "defined(%%hash) is deprecated");
d0334bed 5877 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5878 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5879 break;
5880 default:
5881 /* no warning */
5882 break;
5883 }
69794302
MJD		 5884 }
5885 return ck_rfun(o);
5886}
5887
5888OP *
cea2e8a9 5889Perl_ck_rfun(pTHX_ OP *o)
8990e307 5890{
5dc0d613
MB		 5891 OPCODE type = o->op_type;
5892 return refkids(ck_fun(o), type);
8990e307
LW		 5893}
5894
5895OP *
cea2e8a9 5896Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5897{
5898 register OP *kid;
aeea060c 5899
11343788 5900 kid = cLISTOPo->op_first;
79072805 5901 if (!kid) {
11343788
MB		 5902 o = force_list(o);
5903 kid = cLISTOPo->op_first;
79072805
LW		 5904 }
5905 if (kid->op_type == OP_PUSHMARK)
5906 kid = kid->op_sibling;
11343788 5907 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5908 kid = kid->op_sibling;
5909 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5910 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5911 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5912 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5913 cLISTOPo->op_first->op_sibling = kid;
5914 cLISTOPo->op_last = kid;
79072805
LW		 5915 kid = kid->op_sibling;
5916 }
5917 }
5918
5919 if (!kid)
54b9620d 5920 append_elem(o->op_type, o, newDEFSVOP());
79072805 5921
5dc0d613 5922 o = listkids(o);
bbce6d69 5923
5dc0d613 5924 o->op_private = 0;
36477c24 5925#ifdef USE_LOCALE
3280af22 5926 if (PL_hints & HINT_LOCALE)
5dc0d613 5927 o->op_private |= OPpLOCALE;
bbce6d69 5928#endif
5929
5dc0d613 5930 return o;
bbce6d69 5931}
5932
5933OP *
cea2e8a9 5934Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5935{
5dc0d613 5936 o = ck_fun(o);
bbce6d69 5937
5dc0d613 5938 o->op_private = 0;
36477c24 5939#ifdef USE_LOCALE
3280af22 5940 if (PL_hints & HINT_LOCALE)
5dc0d613 5941 o->op_private |= OPpLOCALE;
bbce6d69 5942#endif
5943
5dc0d613 5944 return o;
bbce6d69 5945}
5946
5947OP *
b162f9ea
IZ		 5948Perl_ck_sassign(pTHX_ OP *o)
5949{
5950 OP *kid = cLISTOPo->op_first;
5951 /* has a disposable target? */
5952 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5953 && !(kid->op_flags & OPf_STACKED)
5954 /* Cannot steal the second time! */
5955 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5956 {
5957 OP *kkid = kid->op_sibling;
5958
5959 /* Can just relocate the target. */
2c2d71f5
JH		 5960 if (kkid && kkid->op_type == OP_PADSV
5961 && !(kkid->op_private & OPpLVAL_INTRO))
5962 {
b162f9ea 5963 kid->op_targ = kkid->op_targ;
743e66e6 5964 kkid->op_targ = 0;
b162f9ea
IZ		 5965 /* Now we do not need PADSV and SASSIGN. */
5966 kid->op_sibling = o->op_sibling; /* NULL */
5967 cLISTOPo->op_first = NULL;
5968 op_free(o);
5969 op_free(kkid);
5970 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5971 return kid;
5972 }
5973 }
5974 return o;
5975}
5976
5977OP *
cea2e8a9 5978Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5979{
5dc0d613 5980 o->op_private = 0;
36477c24 5981#ifdef USE_LOCALE
3280af22 5982 if (PL_hints & HINT_LOCALE)
5dc0d613 5983 o->op_private |= OPpLOCALE;
bbce6d69 5984#endif
36477c24 5985
5dc0d613 5986 return o;
79072805
LW		 5987}
5988
5989OP *
cea2e8a9 5990Perl_ck_match(pTHX_ OP *o)
79072805 5991{
5dc0d613 5992 o->op_private |= OPpRUNTIME;
11343788 5993 return o;
79072805
LW		 5994}
5995
5996OP *
f5d5a27c
CS		 5997Perl_ck_method(pTHX_ OP *o)
5998{
5999 OP *kid = cUNOPo->op_first;
6000 if (kid->op_type == OP_CONST) {
6001 SV* sv = kSVOP->op_sv;
6002 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
6003 OP *cmop;
1c846c1f
NIS		 6004 if (!SvREADONLY(sv) || !SvFAKE(sv)) {
6005 sv = newSVpvn_share(SvPVX(sv), SvCUR(sv), 0);
6006 }
6007 else {
6008 kSVOP->op_sv = Nullsv;
6009 }
f5d5a27c 6010 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
f5d5a27c
CS		 6011 op_free(o);
6012 return cmop;
6013 }
6014 }
6015 return o;
6016}
6017
6018OP *
cea2e8a9 6019Perl_ck_null(pTHX_ OP *o)
79072805 6020{
11343788 6021 return o;
79072805
LW		 6022}
6023
6024OP *
16fe6d59
GS		 6025Perl_ck_open(pTHX_ OP *o)
6026{
6027 HV *table = GvHV(PL_hintgv);
6028 if (table) {
6029 SV **svp;
6030 I32 mode;
6031 svp = hv_fetch(table, "open_IN", 7, FALSE);
6032 if (svp && *svp) {
6033 mode = mode_from_discipline(*svp);
6034 if (mode & O_BINARY)
6035 o->op_private |= OPpOPEN_IN_RAW;
6036 else if (mode & O_TEXT)
6037 o->op_private |= OPpOPEN_IN_CRLF;
6038 }
6039
6040 svp = hv_fetch(table, "open_OUT", 8, FALSE);
6041 if (svp && *svp) {
6042 mode = mode_from_discipline(*svp);
6043 if (mode & O_BINARY)
6044 o->op_private |= OPpOPEN_OUT_RAW;
6045 else if (mode & O_TEXT)
6046 o->op_private |= OPpOPEN_OUT_CRLF;
6047 }
6048 }
6049 if (o->op_type == OP_BACKTICK)
6050 return o;
6051 return ck_fun(o);
6052}
6053
6054OP *
cea2e8a9 6055Perl_ck_repeat(pTHX_ OP *o)
79072805 6056{
11343788
MB		 6057 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
6058 o->op_private |= OPpREPEAT_DOLIST;
6059 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 6060 }
6061 else
11343788
MB		 6062 scalar(o);
6063 return o;
79072805
LW		 6064}
6065
6066OP *
cea2e8a9 6067Perl_ck_require(pTHX_ OP *o)
8990e307 6068{
11343788
MB		 6069 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
6070 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 6071
6072 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 6073 char *s;
a0d0e21e
LW		 6074 for (s = SvPVX(kid->op_sv); *s; s++) {
6075 if (*s == ':' && s[1] == ':') {
6076 *s = '/';
1aef975c 6077 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 6078 --SvCUR(kid->op_sv);
6079 }
8990e307 6080 }
ce3b816e
GS		 6081 if (SvREADONLY(kid->op_sv)) {
6082 SvREADONLY_off(kid->op_sv);
6083 sv_catpvn(kid->op_sv, ".pm", 3);
6084 SvREADONLY_on(kid->op_sv);
6085 }
6086 else
6087 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 6088 }
6089 }
11343788 6090 return ck_fun(o);
8990e307
LW		 6091}
6092
22c35a8c 6093#if 0
8990e307 6094OP *
cea2e8a9 6095Perl_ck_retarget(pTHX_ OP *o)
79072805 6096{
cea2e8a9 6097 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 6098 /* STUB */
11343788 6099 return o;
79072805 6100}
22c35a8c 6101#endif
79072805
LW		 6102
6103OP *
cea2e8a9 6104Perl_ck_select(pTHX_ OP *o)
79072805 6105{
c07a80fd 6106 OP* kid;
11343788
MB		 6107 if (o->op_flags & OPf_KIDS) {
6108 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 6109 if (kid && kid->op_sibling) {
11343788 6110 o->op_type = OP_SSELECT;
22c35a8c 6111 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 6112 o = ck_fun(o);
6113 return fold_constants(o);
79072805
LW		 6114 }
6115 }
11343788
MB		 6116 o = ck_fun(o);
6117 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 6118 if (kid && kid->op_type == OP_RV2GV)
6119 kid->op_private &= ~HINT_STRICT_REFS;
11343788 6120 return o;
79072805
LW		 6121}
6122
6123OP *
cea2e8a9 6124Perl_ck_shift(pTHX_ OP *o)
79072805 6125{
11343788 6126 I32 type = o->op_type;
79072805 6127
11343788 6128 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 6129 OP *argop;
6130
11343788 6131 op_free(o);
6d4ff0d2 6132#ifdef USE_THREADS
533c011a 6133 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 6134 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 6135 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 6136 }
6137 else {
6138 argop = newUNOP(OP_RV2AV, 0,
6139 scalar(newGVOP(OP_GV, 0,
6140 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6141 }
6142#else
6143 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 6144 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6145 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6146#endif /* USE_THREADS */
6147 return newUNOP(type, 0, scalar(argop));
79072805 6148 }
11343788 6149 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6150}
6151
6152OP *
cea2e8a9 6153Perl_ck_sort(pTHX_ OP *o)
79072805 6154{
8e3f9bdf 6155 OP *firstkid;
5dc0d613 6156 o->op_private = 0;
36477c24 6157#ifdef USE_LOCALE
3280af22 6158 if (PL_hints & HINT_LOCALE)
5dc0d613 6159 o->op_private |= OPpLOCALE;
bbce6d69 6160#endif
6161
9ea6e965 6162 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6163 simplify_sort(o);
8e3f9bdf
GS		 6164 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6165 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6166 OP *k;
8e3f9bdf 6167 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6168
463ee0b2 6169 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6170 linklist(kid);
463ee0b2
LW		 6171 if (kid->op_type == OP_SCOPE) {
6172 k = kid->op_next;
6173 kid->op_next = 0;
79072805 6174 }
463ee0b2 6175 else if (kid->op_type == OP_LEAVE) {
11343788 6176 if (o->op_type == OP_SORT) {
748a9306
LW		 6177 null(kid); /* wipe out leave */
6178 kid->op_next = kid;
463ee0b2 6179
748a9306
LW		 6180 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6181 if (k->op_next == kid)
6182 k->op_next = 0;
71a29c3c
GS		 6183 /* don't descend into loops */
6184 else if (k->op_type == OP_ENTERLOOP
6185 || k->op_type == OP_ENTERITER)
6186 {
6187 k = cLOOPx(k)->op_lastop;
6188 }
748a9306 6189 }
463ee0b2 6190 }
748a9306
LW		 6191 else
6192 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6193 k = kLISTOP->op_first;
463ee0b2 6194 }
a0d0e21e
LW		 6195 peep(k);
6196
8e3f9bdf
GS		 6197 kid = firstkid;
6198 if (o->op_type == OP_SORT) {
6199 /* provide scalar context for comparison function/block */
6200 kid = scalar(kid);
a0d0e21e 6201 kid->op_next = kid;
8e3f9bdf 6202 }
a0d0e21e
LW		 6203 else
6204 kid->op_next = k;
11343788 6205 o->op_flags |= OPf_SPECIAL;
79072805 6206 }
c6e96bcb 6207 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6208 null(firstkid);
6209
6210 firstkid = firstkid->op_sibling;
79072805 6211 }
bbce6d69 6212
8e3f9bdf
GS		 6213 /* provide list context for arguments */
6214 if (o->op_type == OP_SORT)
6215 list(firstkid);
6216
11343788 6217 return o;
79072805 6218}
bda4119b
GS		 6219
6220STATIC void
cea2e8a9 6221S_simplify_sort(pTHX_ OP *o)
9c007264 6222{
51a19bc0 6223 dTHR;
9c007264
JH		 6224 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6225 OP *k;
6226 int reversed;
350de78d 6227 GV *gv;
9c007264
JH		 6228 if (!(o->op_flags & OPf_STACKED))
6229 return;
1c846c1f
NIS		 6230 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6231 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6232 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6233 if (kid->op_type != OP_SCOPE)
6234 return;
6235 kid = kLISTOP->op_last; /* get past scope */
6236 switch(kid->op_type) {
6237 case OP_NCMP:
6238 case OP_I_NCMP:
6239 case OP_SCMP:
6240 break;
6241 default:
6242 return;
6243 }
6244 k = kid; /* remember this node*/
6245 if (kBINOP->op_first->op_type != OP_RV2SV)
6246 return;
6247 kid = kBINOP->op_first; /* get past cmp */
6248 if (kUNOP->op_first->op_type != OP_GV)
6249 return;
6250 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6251 gv = kGVOP_gv;
350de78d 6252 if (GvSTASH(gv) != PL_curstash)
9c007264 6253 return;
350de78d 6254 if (strEQ(GvNAME(gv), "a"))
9c007264 6255 reversed = 0;
0f79a09d 6256 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6257 reversed = 1;
6258 else
6259 return;
6260 kid = k; /* back to cmp */
6261 if (kBINOP->op_last->op_type != OP_RV2SV)
6262 return;
6263 kid = kBINOP->op_last; /* down to 2nd arg */
6264 if (kUNOP->op_first->op_type != OP_GV)
6265 return;
6266 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6267 gv = kGVOP_gv;
350de78d 6268 if (GvSTASH(gv) != PL_curstash
9c007264 6269 || ( reversed
350de78d
GS		 6270 ? strNE(GvNAME(gv), "a")
6271 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6272 return;
6273 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6274 if (reversed)
6275 o->op_private |= OPpSORT_REVERSE;
6276 if (k->op_type == OP_NCMP)
6277 o->op_private |= OPpSORT_NUMERIC;
6278 if (k->op_type == OP_I_NCMP)
6279 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6280 kid = cLISTOPo->op_first->op_sibling;
6281 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6282 op_free(kid); /* then delete it */
6283 cLISTOPo->op_children--;
9c007264 6284}
79072805
LW		 6285
6286OP *
cea2e8a9 6287Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6288{
6289 register OP *kid;
aeea060c 6290
11343788
MB		 6291 if (o->op_flags & OPf_STACKED)
6292 return no_fh_allowed(o);
79072805 6293
11343788 6294 kid = cLISTOPo->op_first;
8990e307 6295 if (kid->op_type != OP_NULL)
cea2e8a9 6296 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6297 kid = kid->op_sibling;
11343788
MB		 6298 op_free(cLISTOPo->op_first);
6299 cLISTOPo->op_first = kid;
85e6fe83 6300 if (!kid) {
79cb57f6 6301 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6302 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6303 }
79072805 6304
de4bf5b3 6305 if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) {
79072805 6306 OP *sibl = kid->op_sibling;
463ee0b2 6307 kid->op_sibling = 0;
79072805 6308 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6309 if (cLISTOPo->op_first == cLISTOPo->op_last)
6310 cLISTOPo->op_last = kid;
6311 cLISTOPo->op_first = kid;
79072805
LW		 6312 kid->op_sibling = sibl;
6313 }
6314
6315 kid->op_type = OP_PUSHRE;
22c35a8c 6316 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6317 scalar(kid);
6318
6319 if (!kid->op_sibling)
54b9620d 6320 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6321
6322 kid = kid->op_sibling;
6323 scalar(kid);
6324
6325 if (!kid->op_sibling)
11343788 6326 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6327
6328 kid = kid->op_sibling;
6329 scalar(kid);
6330
6331 if (kid->op_sibling)
22c35a8c 6332 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6333
11343788 6334 return o;
79072805
LW		 6335}
6336
6337OP *
1c846c1f 6338Perl_ck_join(pTHX_ OP *o)
eb6e2d6f
GS		 6339{
6340 if (ckWARN(WARN_SYNTAX)) {
6341 OP *kid = cLISTOPo->op_first->op_sibling;
6342 if (kid && kid->op_type == OP_MATCH) {
6343 char *pmstr = "STRING";
6344 if (kPMOP->op_pmregexp)
6345 pmstr = kPMOP->op_pmregexp->precomp;
6346 Perl_warner(aTHX_ WARN_SYNTAX,
6347 "/%s/ should probably be written as \"%s\"",
6348 pmstr, pmstr);
6349 }
6350 }
6351 return ck_fun(o);
6352}
6353
6354OP *
cea2e8a9 6355Perl_ck_subr(pTHX_ OP *o)
79072805 6356{
11343788
MB		 6357 dTHR;
6358 OP *prev = ((cUNOPo->op_first->op_sibling)
6359 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6360 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6361 OP *cvop;
6362 char *proto = 0;
6363 CV *cv = 0;
46fc3d4c 6364 GV *namegv = 0;
4633a7c4
LW		 6365 int optional = 0;
6366 I32 arg = 0;
2d8e6c8d 6367 STRLEN n_a;
4633a7c4 6368
d3011074 6369 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6370 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6371 if (cvop->op_type == OP_RV2CV) {
6372 SVOP* tmpop;
11343788 6373 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6374 null(cvop); /* disable rv2cv */
6375 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6376 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6377 GV *gv = cGVOPx_gv(tmpop);
350de78d 6378 cv = GvCVu(gv);
76cd736e
GS		 6379 if (!cv)
6380 tmpop->op_private |= OPpEARLY_CV;
6381 else if (SvPOK(cv)) {
350de78d 6382 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6383 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6384 }
4633a7c4
LW		 6385 }
6386 }
f5d5a27c 6387 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6388 if (o2->op_type == OP_CONST)
6389 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6390 else if (o2->op_type == OP_LIST) {
6391 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6392 if (o && o->op_type == OP_CONST)
6393 o->op_private &= ~OPpCONST_STRICT;
6394 }
7a52d87a 6395 }
3280af22
NIS		 6396 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6397 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6398 o->op_private |= OPpENTERSUB_DB;
6399 while (o2 != cvop) {
4633a7c4
LW		 6400 if (proto) {
6401 switch (*proto) {
6402 case '\0':
5dc0d613 6403 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6404 case ';':
6405 optional = 1;
6406 proto++;
6407 continue;
6408 case '$':
6409 proto++;
6410 arg++;
11343788 6411 scalar(o2);
4633a7c4
LW		 6412 break;
6413 case '%':
6414 case '@':
11343788 6415 list(o2);
4633a7c4
LW		 6416 arg++;
6417 break;
6418 case '&':
6419 proto++;
6420 arg++;
11343788 6421 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6422 bad_type(arg,
6423 arg == 1 ? "block or sub {}" : "sub {}",
6424 gv_ename(namegv), o2);
4633a7c4
LW		 6425 break;
6426 case '*':
2ba6ecf4 6427 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6428 proto++;
6429 arg++;
11343788 6430 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6431 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6432 else if (o2->op_type == OP_CONST)
6433 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6434 else if (o2->op_type == OP_ENTERSUB) {
6435 /* accidental subroutine, revert to bareword */
6436 OP *gvop = ((UNOP*)o2)->op_first;
6437 if (gvop && gvop->op_type == OP_NULL) {
6438 gvop = ((UNOP*)gvop)->op_first;
6439 if (gvop) {
6440 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6441 ;
6442 if (gvop &&
6443 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6444 (gvop = ((UNOP*)gvop)->op_first) &&
6445 gvop->op_type == OP_GV)
6446 {
638eceb6 6447 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6448 OP *sibling = o2->op_sibling;
2692f720 6449 SV *n = newSVpvn("",0);
9675f7ac 6450 op_free(o2);
2692f720
GS		 6451 gv_fullname3(n, gv, "");
6452 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6453 sv_chop(n, SvPVX(n)+6);
6454 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6455 prev->op_sibling = o2;
6456 o2->op_sibling = sibling;
6457 }
6458 }
6459 }
6460 }
2ba6ecf4
GS		 6461 scalar(o2);
6462 break;
4633a7c4
LW		 6463 case '\\':
6464 proto++;
6465 arg++;
6466 switch (*proto++) {
6467 case '*':
11343788 6468 if (o2->op_type != OP_RV2GV)
5dc0d613 6469 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6470 goto wrapref;
6471 case '&':
75fc29ea
GS		 6472 if (o2->op_type != OP_ENTERSUB)
6473 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6474 goto wrapref;
6475 case '$':
386acf99
GS		 6476 if (o2->op_type != OP_RV2SV
6477 && o2->op_type != OP_PADSV
1c01eb51
GS		 6478 && o2->op_type != OP_HELEM
6479 && o2->op_type != OP_AELEM
386acf99
GS		 6480 && o2->op_type != OP_THREADSV)
6481 {
5dc0d613 6482 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6483 }
4633a7c4
LW		 6484 goto wrapref;
6485 case '@':
11343788 6486 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6487 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6488 goto wrapref;
6489 case '%':
11343788 6490 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6491 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6492 wrapref:
6493 {
11343788 6494 OP* kid = o2;
6fa846a0 6495 OP* sib = kid->op_sibling;
4633a7c4 6496 kid->op_sibling = 0;
6fa846a0
GS		 6497 o2 = newUNOP(OP_REFGEN, 0, kid);
6498 o2->op_sibling = sib;
e858de61 6499 prev->op_sibling = o2;
4633a7c4
LW		 6500 }
6501 break;
6502 default: goto oops;
6503 }
6504 break;
b1cb66bf 6505 case ' ':
6506 proto++;
6507 continue;
4633a7c4
LW		 6508 default:
6509 oops:
cea2e8a9 6510 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6511 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6512 }
6513 }
6514 else
11343788
MB		 6515 list(o2);
6516 mod(o2, OP_ENTERSUB);
6517 prev = o2;
6518 o2 = o2->op_sibling;
4633a7c4 6519 }
fb73857a 6520 if (proto && !optional &&
6521 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6522 return too_few_arguments(o, gv_ename(namegv));
11343788 6523 return o;
79072805
LW		 6524}
6525
6526OP *
cea2e8a9 6527Perl_ck_svconst(pTHX_ OP *o)
8990e307 6528{
11343788
MB		 6529 SvREADONLY_on(cSVOPo->op_sv);
6530 return o;
8990e307
LW		 6531}
6532
6533OP *
cea2e8a9 6534Perl_ck_trunc(pTHX_ OP *o)
79072805 6535{
11343788
MB		 6536 if (o->op_flags & OPf_KIDS) {
6537 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6538
a0d0e21e
LW		 6539 if (kid->op_type == OP_NULL)
6540 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6541 if (kid && kid->op_type == OP_CONST &&
6542 (kid->op_private & OPpCONST_BARE))
6543 {
11343788 6544 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6545 kid->op_private &= ~OPpCONST_STRICT;
6546 }
79072805 6547 }
11343788 6548 return ck_fun(o);
79072805
LW		 6549}
6550
35fba0d9
RG		 6551OP *
6552Perl_ck_substr(pTHX_ OP *o)
6553{
6554 o = ck_fun(o);
6555 if ((o->op_flags & OPf_KIDS) && o->op_private == 4) {
6556 OP *kid = cLISTOPo->op_first;
6557
6558 if (kid->op_type == OP_NULL)
6559 kid = kid->op_sibling;
6560 if (kid)
6561 kid->op_flags |= OPf_MOD;
6562
6563 }
6564 return o;
6565}
6566
463ee0b2
LW		 6567/* A peephole optimizer. We visit the ops in the order they're to execute. */
6568
79072805 6569void
864dbfa3 6570Perl_peep(pTHX_ register OP *o)
79072805 6571{
11343788 6572 dTHR;
79072805 6573 register OP* oldop = 0;
2d8e6c8d 6574 STRLEN n_a;
cd06dffe 6575 OP *last_composite = Nullop;
2d8e6c8d 6576
a0d0e21e 6577 if (!o || o->op_seq)
79072805 6578 return;
a0d0e21e 6579 ENTER;
462e5cf6 6580 SAVEOP();
7766f137 6581 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6582 for (; o; o = o->op_next) {
6583 if (o->op_seq)
6584 break;
3280af22
NIS		 6585 if (!PL_op_seqmax)
6586 PL_op_seqmax++;
533c011a 6587 PL_op = o;
a0d0e21e 6588 switch (o->op_type) {
acb36ea4 6589 case OP_SETSTATE:
a0d0e21e
LW		 6590 case OP_NEXTSTATE:
6591 case OP_DBSTATE:
3280af22
NIS		 6592 PL_curcop = ((COP*)o); /* for warnings */
6593 o->op_seq = PL_op_seqmax++;
cd06dffe 6594 last_composite = Nullop;
a0d0e21e
LW		 6595 break;
6596
a0d0e21e 6597 case OP_CONST:
7a52d87a
GS		 6598 if (cSVOPo->op_private & OPpCONST_STRICT)
6599 no_bareword_allowed(o);
7766f137
GS		 6600#ifdef USE_ITHREADS
6601 /* Relocate sv to the pad for thread safety.
6602 * Despite being a "constant", the SV is written to,
6603 * for reference counts, sv_upgrade() etc. */
6604 if (cSVOP->op_sv) {
6605 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6606 if (SvPADTMP(cSVOPo->op_sv)) {
6607 /* If op_sv is already a PADTMP then it is being used by
9a049f1c 6608 * some pad, so make a copy. */
6a7129a1
GS		 6609 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6610 SvREADONLY_on(PL_curpad[ix]);
6611 SvREFCNT_dec(cSVOPo->op_sv);
6612 }
6613 else {
6614 SvREFCNT_dec(PL_curpad[ix]);
6615 SvPADTMP_on(cSVOPo->op_sv);
6616 PL_curpad[ix] = cSVOPo->op_sv;
9a049f1c
JT		 6617 /* XXX I don't know how this isn't readonly already. */
6618 SvREADONLY_on(PL_curpad[ix]);
6a7129a1 6619 }
7766f137
GS		 6620 cSVOPo->op_sv = Nullsv;
6621 o->op_targ = ix;
6622 }
6623#endif
07447971
GS		 6624 o->op_seq = PL_op_seqmax++;
6625 break;
6626
ed7ab888 6627 case OP_CONCAT:
b162f9ea
IZ		 6628 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6629 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6630 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6631 goto ignore_optimization;
cd06dffe 6632 else {
07447971 6633 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6634 o->op_targ = o->op_next->op_targ;
743e66e6 6635 o->op_next->op_targ = 0;
2c2d71f5 6636 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6637 }
6638 }
a0d0e21e 6639 null(o->op_next);
b162f9ea
IZ		 6640 }
6641 ignore_optimization:
3280af22 6642 o->op_seq = PL_op_seqmax++;
a0d0e21e 6643 break;
8990e307 6644 case OP_STUB:
54310121 6645 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6646 o->op_seq = PL_op_seqmax++;
54310121 6647 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6648 }
748a9306 6649 goto nothin;
79072805 6650 case OP_NULL:
acb36ea4
GS		 6651 if (o->op_targ == OP_NEXTSTATE
6652 || o->op_targ == OP_DBSTATE
6653 || o->op_targ == OP_SETSTATE)
6654 {
3280af22 6655 PL_curcop = ((COP*)o);
acb36ea4 6656 }
748a9306 6657 goto nothin;
79072805 6658 case OP_SCALAR:
93a17b20 6659 case OP_LINESEQ:
463ee0b2 6660 case OP_SCOPE:
748a9306 6661 nothin:
a0d0e21e
LW		 6662 if (oldop && o->op_next) {
6663 oldop->op_next = o->op_next;
79072805
LW		 6664 continue;
6665 }
3280af22 6666 o->op_seq = PL_op_seqmax++;
79072805
LW		 6667 break;
6668
6669 case OP_GV:
a0d0e21e 6670 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6671 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6672 null(o->op_next);
64aac5a9
GS		 6673 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6674 | OPpOUR_INTRO);
a0d0e21e
LW		 6675 o->op_next = o->op_next->op_next;
6676 o->op_type = OP_GVSV;
22c35a8c 6677 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6678 }
6679 }
a0d0e21e
LW		 6680 else if (o->op_next->op_type == OP_RV2AV) {
6681 OP* pop = o->op_next->op_next;
6682 IV i;
8990e307 6683 if (pop->op_type == OP_CONST &&
533c011a 6684 (PL_op = pop->op_next) &&
8990e307 6685 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6686 !(pop->op_next->op_private &
68dc0745 6687 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6688 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6689 <= 255 &&
8990e307
LW		 6690 i >= 0)
6691 {
350de78d 6692 GV *gv;
a0d0e21e 6693 null(o->op_next);
8990e307
LW		 6694 null(pop->op_next);
6695 null(pop);
a0d0e21e
LW		 6696 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6697 o->op_next = pop->op_next->op_next;
6698 o->op_type = OP_AELEMFAST;
22c35a8c 6699 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6700 o->op_private = (U8)i;
638eceb6 6701 gv = cGVOPo_gv;
350de78d 6702 GvAVn(gv);
8990e307 6703 }
79072805 6704 }
e476b1b5 6705 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6706 GV *gv = cGVOPo_gv;
76cd736e
GS		 6707 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6708 /* XXX could check prototype here instead of just carping */
6709 SV *sv = sv_newmortal();
6710 gv_efullname3(sv, gv, Nullch);
e476b1b5 6711 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6712 "%s() called too early to check prototype",
6713 SvPV_nolen(sv));
6714 }
6715 }
6716
3280af22 6717 o->op_seq = PL_op_seqmax++;
79072805
LW		 6718 break;
6719
a0d0e21e 6720 case OP_MAPWHILE:
79072805
LW		 6721 case OP_GREPWHILE:
6722 case OP_AND:
6723 case OP_OR:
2c2d71f5
JH		 6724 case OP_ANDASSIGN:
6725 case OP_ORASSIGN:
1a67a97c
SM		 6726 case OP_COND_EXPR:
6727 case OP_RANGE:
3280af22 6728 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6729 while (cLOGOP->op_other->op_type == OP_NULL)
6730 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6731 peep(cLOGOP->op_other);
6732 break;
6733
79072805 6734 case OP_ENTERLOOP:
3280af22 6735 o->op_seq = PL_op_seqmax++;
79072805
LW		 6736 peep(cLOOP->op_redoop);
6737 peep(cLOOP->op_nextop);
6738 peep(cLOOP->op_lastop);
6739 break;
6740
8782bef2 6741 case OP_QR:
79072805
LW		 6742 case OP_MATCH:
6743 case OP_SUBST:
3280af22 6744 o->op_seq = PL_op_seqmax++;
a0d0e21e 6745 peep(cPMOP->op_pmreplstart);
79072805
LW		 6746 break;
6747
a0d0e21e 6748 case OP_EXEC:
3280af22 6749 o->op_seq = PL_op_seqmax++;
1c846c1f 6750 if (ckWARN(WARN_SYNTAX) && o->op_next
599cee73 6751 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6752 if (o->op_next->op_sibling &&
20408e3c
GS		 6753 o->op_next->op_sibling->op_type != OP_EXIT &&
6754 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6755 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6756 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6757
57843af0 6758 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6759 Perl_warner(aTHX_ WARN_EXEC,
6760 "Statement unlikely to be reached");
6761 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6762 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6763 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6764 }
6765 }
6766 break;
aeea060c 6767
c750a3ec
MB		 6768 case OP_HELEM: {
6769 UNOP *rop;
6770 SV *lexname;
6771 GV **fields;
9615e741 6772 SV **svp, **indsvp, *sv;
c750a3ec 6773 I32 ind;
1c846c1f 6774 char *key = NULL;
c750a3ec 6775 STRLEN keylen;
aeea060c 6776
9615e741 6777 o->op_seq = PL_op_seqmax++;
1c846c1f
NIS		 6778
6779 if (((BINOP*)o)->op_last->op_type != OP_CONST)
c750a3ec 6780 break;
1c846c1f
NIS		 6781
6782 /* Make the CONST have a shared SV */
6783 svp = cSVOPx_svp(((BINOP*)o)->op_last);
3049cdab 6784 if ((!SvFAKE(sv = *svp) || !SvREADONLY(sv)) && !IS_PADCONST(sv)) {
1c846c1f
NIS		 6785 key = SvPV(sv, keylen);
6786 lexname = newSVpvn_share(key, keylen, 0);
6787 SvREFCNT_dec(sv);
6788 *svp = lexname;
6789 }
6790
6791 if ((o->op_private & (OPpLVAL_INTRO)))
6792 break;
6793
c750a3ec
MB		 6794 rop = (UNOP*)((BINOP*)o)->op_first;
6795 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6796 break;
3280af22 6797 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6798 if (!SvOBJECT(lexname))
6799 break;
5196be3e 6800 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6801 if (!fields || !GvHV(*fields))
6802 break;
c750a3ec
MB		 6803 key = SvPV(*svp, keylen);
6804 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6805 if (!indsvp) {
88e9b055 6806 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6807 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6808 }
6809 ind = SvIV(*indsvp);
6810 if (ind < 1)
cea2e8a9 6811 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6812 rop->op_type = OP_RV2AV;
22c35a8c 6813 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6814 o->op_type = OP_AELEM;
22c35a8c 6815 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6816 sv = newSViv(ind);
6817 if (SvREADONLY(*svp))
6818 SvREADONLY_on(sv);
6819 SvFLAGS(sv) |= (SvFLAGS(*svp)
6820 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6821 SvREFCNT_dec(*svp);
9615e741 6822 *svp = sv;
c750a3ec
MB		 6823 break;
6824 }
345599ca
GS		 6825
6826 case OP_HSLICE: {
6827 UNOP *rop;
6828 SV *lexname;
6829 GV **fields;
9615e741 6830 SV **svp, **indsvp, *sv;
345599ca
GS		 6831 I32 ind;
6832 char *key;
6833 STRLEN keylen;
6834 SVOP *first_key_op, *key_op;
9615e741
GS		 6835
6836 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6837 if ((o->op_private & (OPpLVAL_INTRO))
6838 /* I bet there's always a pushmark... */
6839 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6840 /* hmmm, no optimization if list contains only one key. */
6841 break;
6842 rop = (UNOP*)((LISTOP*)o)->op_last;
6843 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6844 break;
6845 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6846 if (!SvOBJECT(lexname))
6847 break;
6848 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6849 if (!fields || !GvHV(*fields))
6850 break;
6851 /* Again guessing that the pushmark can be jumped over.... */
6852 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6853 ->op_first->op_sibling;
6854 /* Check that the key list contains only constants. */
6855 for (key_op = first_key_op; key_op;
6856 key_op = (SVOP*)key_op->op_sibling)
6857 if (key_op->op_type != OP_CONST)
6858 break;
6859 if (key_op)
6860 break;
6861 rop->op_type = OP_RV2AV;
6862 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6863 o->op_type = OP_ASLICE;
6864 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6865 for (key_op = first_key_op; key_op;
6866 key_op = (SVOP*)key_op->op_sibling) {
6867 svp = cSVOPx_svp(key_op);
6868 key = SvPV(*svp, keylen);
6869 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6870 if (!indsvp) {
9615e741
GS		 6871 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6872 "in variable %s of type %s",
345599ca
GS		 6873 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6874 }
6875 ind = SvIV(*indsvp);
6876 if (ind < 1)
6877 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6878 sv = newSViv(ind);
6879 if (SvREADONLY(*svp))
6880 SvREADONLY_on(sv);
6881 SvFLAGS(sv) |= (SvFLAGS(*svp)
6882 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6883 SvREFCNT_dec(*svp);
9615e741 6884 *svp = sv;
345599ca
GS		 6885 }
6886 break;
6887 }
c750a3ec 6888
cd06dffe
GS		 6889 case OP_RV2AV:
6890 case OP_RV2HV:
6891 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6892 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6893 {
cd06dffe 6894 last_composite = o;
e1f15930 6895 }
cd06dffe
GS		 6896 o->op_seq = PL_op_seqmax++;
6897 break;
6898
6899 case OP_RETURN:
970c4905 6900 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6901 o->op_seq = PL_op_seqmax++;
6902 break;
6903 }
6904 /* FALL THROUGH */
6905
6906 case OP_LEAVESUBLV:
6907 if (last_composite) {
6908 OP *r = last_composite;
6909
6910 while (r->op_sibling)
6911 r = r->op_sibling;
1c846c1f 6912 if (r->op_next == o
cd06dffe
GS		 6913 || (r->op_next->op_type == OP_LIST
6914 && r->op_next->op_next == o))
6915 {
6916 if (last_composite->op_type == OP_RV2AV)
6917 yyerror("Lvalue subs returning arrays not implemented yet");
6918 else
6919 yyerror("Lvalue subs returning hashes not implemented yet");
6920 ;
6921 }
6922 }
6923 /* FALL THROUGH */
6924
79072805 6925 default:
3280af22 6926 o->op_seq = PL_op_seqmax++;
79072805
LW		 6927 break;
6928 }
a0d0e21e 6929 oldop = o;
79072805 6930 }
a0d0e21e 6931 LEAVE;
79072805 6932}
beab0874
JT		 6933
6934#include "XSUB.h"
6935
6936/* Efficient sub that returns a constant scalar value. */
6937static void
6938const_sv_xsub(pTHXo_ CV* cv)
6939{
6940 dXSARGS;
9a049f1c
JT		 6941 EXTEND(sp, 1);
6942 ST(0) = sv_2mortal(SvREFCNT_inc((SV*)XSANY.any_ptr));
beab0874
JT		 6943 XSRETURN(1);
6944}
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