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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
b7dc083c
NIS		 25#ifdef PL_OP_SLAB_ALLOC
26#define SLAB_SIZE 8192
27static char *PL_OpPtr = NULL;
28static int PL_OpSpace = 0;
29#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
30 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
31 else \
32 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
33 } while (0)
34
864dbfa3 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
b7dc083c
NIS		 37{
38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
b7dc083c
NIS		 43#else
44#define NewOp(m, var, c, type) Newz(m, var, c, type)
45#endif
e50aee73 46/*
5dc0d613 47 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 48 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 49 */
11343788 50#define CHECKOP(type,o) \
3280af22 51 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 52 ? ( op_free((OP*)o), \
cea2e8a9 53 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 54 Nullop ) \
fc0dc3b3 55 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 56
c53d7c7d
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
33633739
GS		 153 "\"%s\" variable %s masks earlier declaration in same %s",
154 (PL_in_my == KEY_our ? "our" : "my"),
155 name,
156 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
157 --off;
158 break;
159 }
160 }
161 if (PL_in_my == KEY_our) {
635bab04 162 do {
33633739
GS		 163 if ((sv = svp[off])
164 && sv != &PL_sv_undef
165 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
166 && strEQ(name, SvPVX(sv)))
f472eb5c 167 {
e476b1b5 168 Perl_warner(aTHX_ WARN_MISC,
33633739 169 "\"our\" variable %s redeclared", name);
e476b1b5 170 Perl_warner(aTHX_ WARN_MISC,
cc507455 171 "\t(Did you mean \"local\" instead of \"our\"?)\n");
33633739 172 break;
f472eb5c 173 }
635bab04 174 } while ( off-- > 0 );
b1cb66bf 175 }
176 }
a0d0e21e
LW		 177 off = pad_alloc(OP_PADSV, SVs_PADMY);
178 sv = NEWSV(1102,0);
93a17b20
LW		 179 sv_upgrade(sv, SVt_PVNV);
180 sv_setpv(sv, name);
3280af22 181 if (PL_in_my_stash) {
c750a3ec 182 if (*name != '$')
eb64745e
GS		 183 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
184 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 185 SvOBJECT_on(sv);
186 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 187 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
188 PL_sv_objcount++;
c750a3ec 189 }
f472eb5c
GS		 190 if (PL_in_my == KEY_our) {
191 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 192 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 193 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 194 }
3280af22 195 av_store(PL_comppad_name, off, sv);
65202027 196 SvNVX(sv) = (NV)PAD_MAX;
8990e307 197 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 198 if (!PL_min_intro_pending)
199 PL_min_intro_pending = off;
200 PL_max_intro_pending = off;
93a17b20 201 if (*name == '@')
3280af22 202 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 203 else if (*name == '%')
3280af22
NIS		 204 av_store(PL_comppad, off, (SV*)newHV());
205 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 206 return off;
207}
208
94f23f41
GS		 209STATIC PADOFFSET
210S_pad_addlex(pTHX_ SV *proto_namesv)
211{
212 SV *namesv = NEWSV(1103,0);
213 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
214 sv_upgrade(namesv, SVt_PVNV);
215 sv_setpv(namesv, SvPVX(proto_namesv));
216 av_store(PL_comppad_name, newoff, namesv);
217 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
218 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
219 SvFAKE_on(namesv); /* A ref, not a real var */
220 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
221 SvFLAGS(namesv) |= SVpad_OUR;
222 (void)SvUPGRADE(namesv, SVt_PVGV);
223 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
224 }
225 if (SvOBJECT(proto_namesv)) { /* A typed var */
226 SvOBJECT_on(namesv);
227 (void)SvUPGRADE(namesv, SVt_PVMG);
228 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
229 PL_sv_objcount++;
230 }
231 return newoff;
232}
233
2680586e
GS		 234#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
235
76e3520e 236STATIC PADOFFSET
cea2e8a9 237S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 238 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 239{
11343788 240 dTHR;
748a9306 241 CV *cv;
93a17b20
LW		 242 I32 off;
243 SV *sv;
93a17b20 244 register I32 i;
c09156bb 245 register PERL_CONTEXT *cx;
93a17b20 246
748a9306 247 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 248 AV *curlist = CvPADLIST(cv);
249 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 250 AV *curname;
4fdae800 251
3280af22 252 if (!svp || *svp == &PL_sv_undef)
4633a7c4 253 continue;
748a9306
LW		 254 curname = (AV*)*svp;
255 svp = AvARRAY(curname);
93965878 256 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 257 if ((sv = svp[off]) &&
3280af22 258 sv != &PL_sv_undef &&
748a9306 259 seq <= SvIVX(sv) &&
13826f2c 260 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 261 strEQ(SvPVX(sv), name))
262 {
5f05dabc 263 I32 depth;
264 AV *oldpad;
265 SV *oldsv;
266
267 depth = CvDEPTH(cv);
268 if (!depth) {
9607fc9c 269 if (newoff) {
270 if (SvFAKE(sv))
271 continue;
4fdae800 272 return 0; /* don't clone from inactive stack frame */
9607fc9c 273 }
5f05dabc 274 depth = 1;
275 }
94f23f41 276 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 277 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 278 if (!newoff) { /* Not a mere clone operation. */
94f23f41 279 newoff = pad_addlex(sv);
3280af22 280 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 281 /* "It's closures all the way down." */
3280af22 282 CvCLONE_on(PL_compcv);
54310121 283 if (cv == startcv) {
3280af22 284 if (CvANON(PL_compcv))
54310121 285 oldsv = Nullsv; /* no need to keep ref */
286 }
287 else {
28757baa 288 CV *bcv;
289 for (bcv = startcv;
290 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 291 bcv = CvOUTSIDE(bcv))
292 {
94f23f41
GS		 293 if (CvANON(bcv)) {
294 /* install the missing pad entry in intervening
295 * nested subs and mark them cloneable.
296 * XXX fix pad_foo() to not use globals */
297 AV *ocomppad_name = PL_comppad_name;
298 AV *ocomppad = PL_comppad;
299 SV **ocurpad = PL_curpad;
300 AV *padlist = CvPADLIST(bcv);
301 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
302 PL_comppad = (AV*)AvARRAY(padlist)[1];
303 PL_curpad = AvARRAY(PL_comppad);
304 pad_addlex(sv);
305 PL_comppad_name = ocomppad_name;
306 PL_comppad = ocomppad;
307 PL_curpad = ocurpad;
28757baa 308 CvCLONE_on(bcv);
94f23f41 309 }
28757baa 310 else {
6b35e009
GS		 311 if (ckWARN(WARN_CLOSURE)
312 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
313 {
cea2e8a9 314 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 315 "Variable \"%s\" may be unavailable",
28757baa 316 name);
6b35e009 317 }
28757baa 318 break;
319 }
320 }
321 }
322 }
3280af22 323 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 324 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
325 && !(SvFLAGS(sv) & SVpad_OUR))
326 {
cea2e8a9 327 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 328 "Variable \"%s\" will not stay shared", name);
741b6338 329 }
5f05dabc 330 }
748a9306 331 }
3280af22 332 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 333 return newoff;
334 }
93a17b20
LW		 335 }
336 }
337
2680586e
GS		 338 if (flags & FINDLEX_NOSEARCH)
339 return 0;
340
93a17b20
LW		 341 /* Nothing in current lexical context--try eval's context, if any.
342 * This is necessary to let the perldb get at lexically scoped variables.
343 * XXX This will also probably interact badly with eval tree caching.
344 */
345
748a9306 346 for (i = cx_ix; i >= 0; i--) {
93a17b20 347 cx = &cxstack[i];
6b35e009 348 switch (CxTYPE(cx)) {
93a17b20 349 default:
748a9306
LW		 350 if (i == 0 && saweval) {
351 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 352 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 353 }
93a17b20
LW		 354 break;
355 case CXt_EVAL:
44a8e56a 356 switch (cx->blk_eval.old_op_type) {
357 case OP_ENTEREVAL:
6b35e009
GS		 358 if (CxREALEVAL(cx))
359 saweval = i;
44a8e56a 360 break;
faa7e5bb 361 case OP_DOFILE:
44a8e56a 362 case OP_REQUIRE:
faa7e5bb 363 /* require/do must have their own scope */
44a8e56a 364 return 0;
365 }
93a17b20 366 break;
7766f137 367 case CXt_FORMAT:
93a17b20
LW		 368 case CXt_SUB:
369 if (!saweval)
370 return 0;
371 cv = cx->blk_sub.cv;
3280af22 372 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 373 saweval = i; /* so we know where we were called from */
93a17b20 374 continue;
93a17b20 375 }
748a9306 376 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 377 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 378 }
379 }
380
748a9306
LW		 381 return 0;
382}
a0d0e21e 383
748a9306 384PADOFFSET
864dbfa3 385Perl_pad_findmy(pTHX_ char *name)
748a9306 386{
11343788 387 dTHR;
748a9306 388 I32 off;
54310121 389 I32 pendoff = 0;
748a9306 390 SV *sv;
3280af22
NIS		 391 SV **svp = AvARRAY(PL_comppad_name);
392 U32 seq = PL_cop_seqmax;
6b35e009 393 PERL_CONTEXT *cx;
33b8ce05 394 CV *outside;
748a9306 395
11343788
MB		 396#ifdef USE_THREADS
397 /*
398 * Special case to get lexical (and hence per-thread) @_.
399 * XXX I need to find out how to tell at parse-time whether use
400 * of @_ should refer to a lexical (from a sub) or defgv (global
401 * scope and maybe weird sub-ish things like formats). See
402 * startsub in perly.y. It's possible that @_ could be lexical
403 * (at least from subs) even in non-threaded perl.
404 */
405 if (strEQ(name, "@_"))
406 return 0; /* success. (NOT_IN_PAD indicates failure) */
407#endif /* USE_THREADS */
408
748a9306 409 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 410 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 411 if ((sv = svp[off]) &&
3280af22 412 sv != &PL_sv_undef &&
54310121 413 (!SvIVX(sv) ||
414 (seq <= SvIVX(sv) &&
415 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 416 strEQ(SvPVX(sv), name))
417 {
77ca0c92 418 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 419 return (PADOFFSET)off;
420 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 421 }
422 }
748a9306 423
33b8ce05
GS		 424 outside = CvOUTSIDE(PL_compcv);
425
426 /* Check if if we're compiling an eval'', and adjust seq to be the
427 * eval's seq number. This depends on eval'' having a non-null
428 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 429 * identified by CvEVAL being true and CvGV being null. */
430 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 431 cx = &cxstack[cxstack_ix];
432 if (CxREALEVAL(cx))
433 seq = cx->blk_oldcop->cop_seq;
434 }
435
748a9306 436 /* See if it's in a nested scope */
2680586e 437 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 438 if (off) {
439 /* If there is a pending local definition, this new alias must die */
440 if (pendoff)
3280af22 441 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 442 return off; /* pad_findlex returns 0 for failure...*/
54310121 443 }
11343788 444 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 445}
446
447void
864dbfa3 448Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 449{
0453d815 450 dTHR;
93a17b20 451 I32 off;
3280af22 452 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 453 SV *sv;
3280af22
NIS		 454 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
455 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 456 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
457 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 458 }
459 }
460 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 461 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 462 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 463 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 464 }
465}
466
467PADOFFSET
864dbfa3 468Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 469{
11343788 470 dTHR;
79072805
LW		 471 SV *sv;
472 I32 retval;
473
3280af22 474 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 475 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 476 if (PL_pad_reset_pending)
a0d0e21e 477 pad_reset();
ed6116ce 478 if (tmptype & SVs_PADMY) {
79072805 479 do {
3280af22 480 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 481 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 482 retval = AvFILLp(PL_comppad);
79072805
LW		 483 }
484 else {
3280af22
NIS		 485 SV **names = AvARRAY(PL_comppad_name);
486 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 487 for (;;) {
488 /*
489 * "foreach" index vars temporarily become aliases to non-"my"
490 * values. Thus we must skip, not just pad values that are
491 * marked as current pad values, but also those with names.
492 */
3280af22
NIS		 493 if (++PL_padix <= names_fill &&
494 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 495 continue;
3280af22 496 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
743e66e6 497 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) && !IS_PADGV(sv))
bbce6d69 498 break;
499 }
3280af22 500 retval = PL_padix;
79072805 501 }
8990e307 502 SvFLAGS(sv) |= tmptype;
3280af22 503 PL_curpad = AvARRAY(PL_comppad);
11343788 504#ifdef USE_THREADS
b900a521
JH		 505 DEBUG_X(PerlIO_printf(Perl_debug_log,
506 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
507 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 508 (long) retval, PL_op_name[optype]));
11343788 509#else
b900a521
JH		 510 DEBUG_X(PerlIO_printf(Perl_debug_log,
511 "Pad 0x%"UVxf" alloc %ld for %s\n",
512 PTR2UV(PL_curpad),
22c35a8c 513 (long) retval, PL_op_name[optype]));
11343788 514#endif /* USE_THREADS */
79072805
LW		 515 return (PADOFFSET)retval;
516}
517
518SV *
864dbfa3 519Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 520{
11343788
MB		 521 dTHR;
522#ifdef USE_THREADS
b900a521 523 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 524 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
525 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 526#else
79072805 527 if (!po)
cea2e8a9 528 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 529 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
530 PTR2UV(PL_curpad), (IV)po));
11343788 531#endif /* USE_THREADS */
3280af22 532 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 533}
534
535void
864dbfa3 536Perl_pad_free(pTHX_ PADOFFSET po)
79072805 537{
11343788 538 dTHR;
3280af22 539 if (!PL_curpad)
a0d0e21e 540 return;
3280af22 541 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 542 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 543 if (!po)
cea2e8a9 544 Perl_croak(aTHX_ "panic: pad_free po");
11343788 545#ifdef USE_THREADS
b900a521 546 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 547 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 548 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 549#else
97835f67
JH		 550 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
551 PTR2UV(PL_curpad), (IV)po));
11343788 552#endif /* USE_THREADS */
2aa1bedc 553 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 554 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 555#ifdef USE_ITHREADS
556 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
557#endif
558 }
3280af22
NIS		 559 if ((I32)po < PL_padix)
560 PL_padix = po - 1;
79072805
LW		 561}
562
563void
864dbfa3 564Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 565{
11343788 566 dTHR;
3280af22 567 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 568 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 569 if (!po)
cea2e8a9 570 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 571#ifdef USE_THREADS
b900a521 572 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 573 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
574 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 575#else
97835f67
JH		 576 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
577 PTR2UV(PL_curpad), (IV)po));
11343788 578#endif /* USE_THREADS */
3280af22
NIS		 579 SvPADTMP_off(PL_curpad[po]);
580 PL_curpad[po] = NEWSV(1107,0);
581 SvPADTMP_on(PL_curpad[po]);
582 if ((I32)po < PL_padix)
583 PL_padix = po - 1;
79072805
LW		 584}
585
d9bb4600
GS		 586/* XXX pad_reset() is currently disabled because it results in serious bugs.
587 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
588 * on the stack by OPs that use them, there are several ways to get an alias
589 * to a shared TARG. Such an alias will change randomly and unpredictably.
590 * We avoid doing this until we can think of a Better Way.
591 * GSAR 97-10-29 */
79072805 592void
864dbfa3 593Perl_pad_reset(pTHX)
79072805 594{
d9bb4600 595#ifdef USE_BROKEN_PAD_RESET
11343788 596 dTHR;
79072805
LW		 597 register I32 po;
598
6b88bc9c 599 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 600 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 601#ifdef USE_THREADS
b900a521
JH		 602 DEBUG_X(PerlIO_printf(Perl_debug_log,
603 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
604 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 605#else
b900a521
JH		 606 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
607 PTR2UV(PL_curpad)));
11343788 608#endif /* USE_THREADS */
6b88bc9c
GS		 609 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
610 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
611 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
612 SvPADTMP_off(PL_curpad[po]);
748a9306 613 }
6b88bc9c 614 PL_padix = PL_padix_floor;
79072805 615 }
d9bb4600 616#endif
3280af22 617 PL_pad_reset_pending = FALSE;
79072805
LW		 618}
619
a863c7d1 620#ifdef USE_THREADS
54b9620d 621/* find_threadsv is not reentrant */
a863c7d1 622PADOFFSET
864dbfa3 623Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 624{
625 dTHR;
626 char *p;
627 PADOFFSET key;
554b3eca 628 SV **svp;
54b9620d 629 /* We currently only handle names of a single character */
533c011a 630 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 631 if (!p)
632 return NOT_IN_PAD;
533c011a 633 key = p - PL_threadsv_names;
2d8e6c8d 634 MUTEX_LOCK(&thr->mutex);
54b9620d 635 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 636 if (svp)
637 MUTEX_UNLOCK(&thr->mutex);
638 else {
554b3eca 639 SV *sv = NEWSV(0, 0);
54b9620d 640 av_store(thr->threadsv, key, sv);
940cb80d 641 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 642 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 643 /*
644 * Some magic variables used to be automagically initialised
645 * in gv_fetchpv. Those which are now per-thread magicals get
646 * initialised here instead.
647 */
648 switch (*name) {
54b9620d
MB		 649 case '_':
650 break;
554b3eca
MB		 651 case ';':
652 sv_setpv(sv, "\034");
54b9620d 653 sv_magic(sv, 0, 0, name, 1);
554b3eca 654 break;
c277df42
IZ		 655 case '&':
656 case '`':
657 case '\'':
533c011a 658 PL_sawampersand = TRUE;
a3f914c5
GS		 659 /* FALL THROUGH */
660 case '1':
661 case '2':
662 case '3':
663 case '4':
664 case '5':
665 case '6':
666 case '7':
667 case '8':
668 case '9':
c277df42 669 SvREADONLY_on(sv);
d8b5173a 670 /* FALL THROUGH */
067391ea
GS		 671
672 /* XXX %! tied to Errno.pm needs to be added here.
673 * See gv_fetchpv(). */
674 /* case '!': */
675
54b9620d
MB		 676 default:
677 sv_magic(sv, 0, 0, name, 1);
554b3eca 678 }
bf49b057 679 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 680 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 681 sv, (*name < 32) ? "^" : "",
682 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 683 }
684 return key;
685}
686#endif /* USE_THREADS */
687
79072805
LW		 688/* Destructor */
689
690void
864dbfa3 691Perl_op_free(pTHX_ OP *o)
79072805 692{
85e6fe83 693 register OP *kid, *nextkid;
acb36ea4 694 OPCODE type;
79072805 695
5dc0d613 696 if (!o || o->op_seq == (U16)-1)
79072805
LW		 697 return;
698
7934575e
GS		 699 if (o->op_private & OPpREFCOUNTED) {
700 switch (o->op_type) {
701 case OP_LEAVESUB:
702 case OP_LEAVESUBLV:
703 case OP_LEAVEEVAL:
704 case OP_LEAVE:
705 case OP_SCOPE:
706 case OP_LEAVEWRITE:
707 OP_REFCNT_LOCK;
708 if (OpREFCNT_dec(o)) {
709 OP_REFCNT_UNLOCK;
710 return;
711 }
712 OP_REFCNT_UNLOCK;
713 break;
714 default:
715 break;
716 }
717 }
718
11343788
MB		 719 if (o->op_flags & OPf_KIDS) {
720 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 721 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 722 op_free(kid);
85e6fe83 723 }
79072805 724 }
acb36ea4
GS		 725 type = o->op_type;
726 if (type == OP_NULL)
727 type = o->op_targ;
728
729 /* COP* is not cleared by op_clear() so that we may track line
730 * numbers etc even after null() */
731 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
732 cop_free((COP*)o);
733
734 op_clear(o);
735
736#ifdef PL_OP_SLAB_ALLOC
737 if ((char *) o == PL_OpPtr)
738 {
739 }
740#else
741 Safefree(o);
742#endif
743}
79072805 744
acb36ea4
GS		 745STATIC void
746S_op_clear(pTHX_ OP *o)
747{
11343788 748 switch (o->op_type) {
acb36ea4
GS		 749 case OP_NULL: /* Was holding old type, if any. */
750 case OP_ENTEREVAL: /* Was holding hints. */
751#ifdef USE_THREADS
752 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
753#endif
754 o->op_targ = 0;
a0d0e21e 755 break;
554b3eca 756#ifdef USE_THREADS
8dd3ba40
SM		 757 case OP_ENTERITER:
758 if (!(o->op_flags & OPf_SPECIAL))
759 break;
760 /* FALL THROUGH */
554b3eca 761#endif /* USE_THREADS */
a6006777 762 default:
ac4c12e7 763 if (!(o->op_flags & OPf_REF)
0b94c7bb 764 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 765 break;
766 /* FALL THROUGH */
463ee0b2 767 case OP_GVSV:
79072805 768 case OP_GV:
a6006777 769 case OP_AELEMFAST:
350de78d 770#ifdef USE_ITHREADS
971a9dd3
GS		 771 if (cPADOPo->op_padix > 0) {
772 if (PL_curpad) {
638eceb6 773 GV *gv = cGVOPo_gv;
971a9dd3
GS		 774 pad_swipe(cPADOPo->op_padix);
775 /* No GvIN_PAD_off(gv) here, because other references may still
776 * exist on the pad */
777 SvREFCNT_dec(gv);
778 }
779 cPADOPo->op_padix = 0;
780 }
350de78d 781#else
971a9dd3 782 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 783 cSVOPo->op_sv = Nullsv;
350de78d 784#endif
79072805
LW		 785 break;
786 case OP_CONST:
11343788 787 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 788 cSVOPo->op_sv = Nullsv;
79072805 789 break;
748a9306
LW		 790 case OP_GOTO:
791 case OP_NEXT:
792 case OP_LAST:
793 case OP_REDO:
11343788 794 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 795 break;
796 /* FALL THROUGH */
a0d0e21e 797 case OP_TRANS:
acb36ea4 798 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 799 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 800 cSVOPo->op_sv = Nullsv;
801 }
802 else {
a0ed51b3 803 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 804 cPVOPo->op_pv = Nullch;
805 }
a0d0e21e
LW		 806 break;
807 case OP_SUBST:
11343788 808 op_free(cPMOPo->op_pmreplroot);
971a9dd3 809 goto clear_pmop;
748a9306 810 case OP_PUSHRE:
971a9dd3
GS		 811#ifdef USE_ITHREADS
812 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
813 if (PL_curpad) {
814 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
815 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
816 /* No GvIN_PAD_off(gv) here, because other references may still
817 * exist on the pad */
818 SvREFCNT_dec(gv);
819 }
820 }
821#else
822 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
823#endif
824 /* FALL THROUGH */
a0d0e21e 825 case OP_MATCH:
8782bef2 826 case OP_QR:
971a9dd3
GS		 827clear_pmop:
828 cPMOPo->op_pmreplroot = Nullop;
c277df42 829 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 830 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 831 break;
79072805
LW		 832 }
833
743e66e6 834 if (o->op_targ > 0) {
11343788 835 pad_free(o->op_targ);
743e66e6
GS		 836 o->op_targ = 0;
837 }
79072805
LW		 838}
839
76e3520e 840STATIC void
3eb57f73
HS		 841S_cop_free(pTHX_ COP* cop)
842{
843 Safefree(cop->cop_label);
57843af0
GS		 844#ifdef USE_ITHREADS
845 Safefree(CopFILE(cop)); /* XXXXX share in a pvtable? */
11faa288 846 Safefree(CopSTASHPV(cop)); /* XXXXX share in a pvtable? */
57843af0 847#else
11faa288 848 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 849 SvREFCNT_dec(CopFILEGV(cop));
57843af0 850#endif
0453d815 851 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 852 SvREFCNT_dec(cop->cop_warnings);
853}
854
855STATIC void
cea2e8a9 856S_null(pTHX_ OP *o)
8990e307 857{
acb36ea4
GS		 858 if (o->op_type == OP_NULL)
859 return;
860 op_clear(o);
11343788
MB		 861 o->op_targ = o->op_type;
862 o->op_type = OP_NULL;
22c35a8c 863 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 864}
865
79072805
LW		 866/* Contextualizers */
867
463ee0b2 868#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 869
870OP *
864dbfa3 871Perl_linklist(pTHX_ OP *o)
79072805
LW		 872{
873 register OP *kid;
874
11343788
MB		 875 if (o->op_next)
876 return o->op_next;
79072805
LW		 877
878 /* establish postfix order */
11343788
MB		 879 if (cUNOPo->op_first) {
880 o->op_next = LINKLIST(cUNOPo->op_first);
881 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 882 if (kid->op_sibling)
883 kid->op_next = LINKLIST(kid->op_sibling);
884 else
11343788 885 kid->op_next = o;
79072805
LW		 886 }
887 }
888 else
11343788 889 o->op_next = o;
79072805 890
11343788 891 return o->op_next;
79072805
LW		 892}
893
894OP *
864dbfa3 895Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 896{
897 OP *kid;
11343788
MB		 898 if (o && o->op_flags & OPf_KIDS) {
899 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 900 scalar(kid);
901 }
11343788 902 return o;
79072805
LW		 903}
904
76e3520e 905STATIC OP *
cea2e8a9 906S_scalarboolean(pTHX_ OP *o)
8990e307 907{
d008e5eb 908 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 909 dTHR;
d008e5eb 910 if (ckWARN(WARN_SYNTAX)) {
57843af0 911 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 912
d008e5eb 913 if (PL_copline != NOLINE)
57843af0 914 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 915 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 916 CopLINE_set(PL_curcop, oldline);
d008e5eb 917 }
a0d0e21e 918 }
11343788 919 return scalar(o);
8990e307
LW		 920}
921
922OP *
864dbfa3 923Perl_scalar(pTHX_ OP *o)
79072805
LW		 924{
925 OP *kid;
926
a0d0e21e 927 /* assumes no premature commitment */
3280af22 928 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 929 || o->op_type == OP_RETURN)
7e363e51 930 {
11343788 931 return o;
7e363e51 932 }
79072805 933
5dc0d613 934 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 935
11343788 936 switch (o->op_type) {
79072805 937 case OP_REPEAT:
11343788
MB		 938 if (o->op_private & OPpREPEAT_DOLIST)
939 null(((LISTOP*)cBINOPo->op_first)->op_first);
940 scalar(cBINOPo->op_first);
8990e307 941 break;
79072805
LW		 942 case OP_OR:
943 case OP_AND:
944 case OP_COND_EXPR:
11343788 945 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 946 scalar(kid);
79072805 947 break;
a0d0e21e 948 case OP_SPLIT:
11343788 949 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 950 if (!kPMOP->op_pmreplroot)
951 deprecate("implicit split to @_");
952 }
953 /* FALL THROUGH */
79072805 954 case OP_MATCH:
8782bef2 955 case OP_QR:
79072805
LW		 956 case OP_SUBST:
957 case OP_NULL:
8990e307 958 default:
11343788
MB		 959 if (o->op_flags & OPf_KIDS) {
960 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 961 scalar(kid);
962 }
79072805
LW		 963 break;
964 case OP_LEAVE:
965 case OP_LEAVETRY:
5dc0d613 966 kid = cLISTOPo->op_first;
54310121 967 scalar(kid);
155aba94 968 while ((kid = kid->op_sibling)) {
54310121 969 if (kid->op_sibling)
970 scalarvoid(kid);
971 else
972 scalar(kid);
973 }
3280af22 974 WITH_THR(PL_curcop = &PL_compiling);
54310121 975 break;
748a9306 976 case OP_SCOPE:
79072805 977 case OP_LINESEQ:
8990e307 978 case OP_LIST:
11343788 979 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 980 if (kid->op_sibling)
981 scalarvoid(kid);
982 else
983 scalar(kid);
984 }
3280af22 985 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 986 break;
987 }
11343788 988 return o;
79072805
LW		 989}
990
991OP *
864dbfa3 992Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 993{
994 OP *kid;
8990e307
LW		 995 char* useless = 0;
996 SV* sv;
2ebea0a1
GS		 997 U8 want;
998
acb36ea4
GS		 999 if (o->op_type == OP_NEXTSTATE
1000 || o->op_type == OP_SETSTATE
1001 || o->op_type == OP_DBSTATE
1002 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1003 || o->op_targ == OP_SETSTATE
1004 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1005 {
1006 dTHR;
1007 PL_curcop = (COP*)o; /* for warning below */
1008 }
79072805 1009
54310121 1010 /* assumes no premature commitment */
2ebea0a1
GS		 1011 want = o->op_flags & OPf_WANT;
1012 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1013 || o->op_type == OP_RETURN)
7e363e51 1014 {
11343788 1015 return o;
7e363e51 1016 }
79072805 1017
b162f9ea 1018 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1019 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1020 {
b162f9ea 1021 return scalar(o); /* As if inside SASSIGN */
7e363e51 1022 }
b162f9ea 1023
5dc0d613 1024 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1025
11343788 1026 switch (o->op_type) {
79072805 1027 default:
22c35a8c 1028 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1029 break;
36477c24 1030 /* FALL THROUGH */
1031 case OP_REPEAT:
11343788 1032 if (o->op_flags & OPf_STACKED)
8990e307 1033 break;
5d82c453
GA		 1034 goto func_ops;
1035 case OP_SUBSTR:
1036 if (o->op_private == 4)
1037 break;
8990e307
LW		 1038 /* FALL THROUGH */
1039 case OP_GVSV:
1040 case OP_WANTARRAY:
1041 case OP_GV:
1042 case OP_PADSV:
1043 case OP_PADAV:
1044 case OP_PADHV:
1045 case OP_PADANY:
1046 case OP_AV2ARYLEN:
8990e307 1047 case OP_REF:
a0d0e21e
LW		 1048 case OP_REFGEN:
1049 case OP_SREFGEN:
8990e307
LW		 1050 case OP_DEFINED:
1051 case OP_HEX:
1052 case OP_OCT:
1053 case OP_LENGTH:
8990e307
LW		 1054 case OP_VEC:
1055 case OP_INDEX:
1056 case OP_RINDEX:
1057 case OP_SPRINTF:
1058 case OP_AELEM:
1059 case OP_AELEMFAST:
1060 case OP_ASLICE:
8990e307
LW		 1061 case OP_HELEM:
1062 case OP_HSLICE:
1063 case OP_UNPACK:
1064 case OP_PACK:
8990e307
LW		 1065 case OP_JOIN:
1066 case OP_LSLICE:
1067 case OP_ANONLIST:
1068 case OP_ANONHASH:
1069 case OP_SORT:
1070 case OP_REVERSE:
1071 case OP_RANGE:
1072 case OP_FLIP:
1073 case OP_FLOP:
1074 case OP_CALLER:
1075 case OP_FILENO:
1076 case OP_EOF:
1077 case OP_TELL:
1078 case OP_GETSOCKNAME:
1079 case OP_GETPEERNAME:
1080 case OP_READLINK:
1081 case OP_TELLDIR:
1082 case OP_GETPPID:
1083 case OP_GETPGRP:
1084 case OP_GETPRIORITY:
1085 case OP_TIME:
1086 case OP_TMS:
1087 case OP_LOCALTIME:
1088 case OP_GMTIME:
1089 case OP_GHBYNAME:
1090 case OP_GHBYADDR:
1091 case OP_GHOSTENT:
1092 case OP_GNBYNAME:
1093 case OP_GNBYADDR:
1094 case OP_GNETENT:
1095 case OP_GPBYNAME:
1096 case OP_GPBYNUMBER:
1097 case OP_GPROTOENT:
1098 case OP_GSBYNAME:
1099 case OP_GSBYPORT:
1100 case OP_GSERVENT:
1101 case OP_GPWNAM:
1102 case OP_GPWUID:
1103 case OP_GGRNAM:
1104 case OP_GGRGID:
1105 case OP_GETLOGIN:
5d82c453 1106 func_ops:
64aac5a9 1107 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1108 useless = PL_op_desc[o->op_type];
8990e307
LW		 1109 break;
1110
1111 case OP_RV2GV:
1112 case OP_RV2SV:
1113 case OP_RV2AV:
1114 case OP_RV2HV:
192587c2 1115 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1116 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1117 useless = "a variable";
1118 break;
79072805
LW		 1119
1120 case OP_CONST:
7766f137 1121 sv = cSVOPo_sv;
7a52d87a
GS		 1122 if (cSVOPo->op_private & OPpCONST_STRICT)
1123 no_bareword_allowed(o);
1124 else {
d008e5eb
GS		 1125 dTHR;
1126 if (ckWARN(WARN_VOID)) {
1127 useless = "a constant";
1128 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1129 useless = 0;
1130 else if (SvPOK(sv)) {
1131 if (strnEQ(SvPVX(sv), "di", 2) ||
1132 strnEQ(SvPVX(sv), "ds", 2) ||
1133 strnEQ(SvPVX(sv), "ig", 2))
1134 useless = 0;
1135 }
8990e307
LW		 1136 }
1137 }
acb36ea4 1138 null(o); /* don't execute or even remember it */
79072805
LW		 1139 break;
1140
1141 case OP_POSTINC:
11343788 1142 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1143 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1144 break;
1145
1146 case OP_POSTDEC:
11343788 1147 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1148 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1149 break;
1150
79072805
LW		 1151 case OP_OR:
1152 case OP_AND:
1153 case OP_COND_EXPR:
11343788 1154 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1155 scalarvoid(kid);
1156 break;
5aabfad6 1157
a0d0e21e 1158 case OP_NULL:
11343788 1159 if (o->op_flags & OPf_STACKED)
a0d0e21e 1160 break;
5aabfad6 1161 /* FALL THROUGH */
2ebea0a1
GS		 1162 case OP_NEXTSTATE:
1163 case OP_DBSTATE:
79072805
LW		 1164 case OP_ENTERTRY:
1165 case OP_ENTER:
1166 case OP_SCALAR:
11343788 1167 if (!(o->op_flags & OPf_KIDS))
79072805 1168 break;
54310121 1169 /* FALL THROUGH */
463ee0b2 1170 case OP_SCOPE:
79072805
LW		 1171 case OP_LEAVE:
1172 case OP_LEAVETRY:
a0d0e21e 1173 case OP_LEAVELOOP:
79072805 1174 case OP_LINESEQ:
79072805 1175 case OP_LIST:
11343788 1176 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1177 scalarvoid(kid);
1178 break;
c90c0ff4 1179 case OP_ENTEREVAL:
5196be3e 1180 scalarkids(o);
c90c0ff4 1181 break;
5aabfad6 1182 case OP_REQUIRE:
c90c0ff4 1183 /* all requires must return a boolean value */
5196be3e
MB		 1184 o->op_flags &= ~OPf_WANT;
1185 return scalar(o);
a0d0e21e 1186 case OP_SPLIT:
11343788 1187 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1188 if (!kPMOP->op_pmreplroot)
1189 deprecate("implicit split to @_");
1190 }
1191 break;
79072805 1192 }
d008e5eb
GS		 1193 if (useless) {
1194 dTHR;
1195 if (ckWARN(WARN_VOID))
cea2e8a9 1196 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1197 }
11343788 1198 return o;
79072805
LW		 1199}
1200
1201OP *
864dbfa3 1202Perl_listkids(pTHX_ OP *o)
79072805
LW		 1203{
1204 OP *kid;
11343788
MB		 1205 if (o && o->op_flags & OPf_KIDS) {
1206 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1207 list(kid);
1208 }
11343788 1209 return o;
79072805
LW		 1210}
1211
1212OP *
864dbfa3 1213Perl_list(pTHX_ OP *o)
79072805
LW		 1214{
1215 OP *kid;
1216
a0d0e21e 1217 /* assumes no premature commitment */
3280af22 1218 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1219 || o->op_type == OP_RETURN)
7e363e51 1220 {
11343788 1221 return o;
7e363e51 1222 }
79072805 1223
b162f9ea 1224 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1225 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1226 {
b162f9ea 1227 return o; /* As if inside SASSIGN */
7e363e51 1228 }
b162f9ea 1229
5dc0d613 1230 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1231
11343788 1232 switch (o->op_type) {
79072805
LW		 1233 case OP_FLOP:
1234 case OP_REPEAT:
11343788 1235 list(cBINOPo->op_first);
79072805
LW		 1236 break;
1237 case OP_OR:
1238 case OP_AND:
1239 case OP_COND_EXPR:
11343788 1240 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1241 list(kid);
1242 break;
1243 default:
1244 case OP_MATCH:
8782bef2 1245 case OP_QR:
79072805
LW		 1246 case OP_SUBST:
1247 case OP_NULL:
11343788 1248 if (!(o->op_flags & OPf_KIDS))
79072805 1249 break;
11343788
MB		 1250 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1251 list(cBINOPo->op_first);
1252 return gen_constant_list(o);
79072805
LW		 1253 }
1254 case OP_LIST:
11343788 1255 listkids(o);
79072805
LW		 1256 break;
1257 case OP_LEAVE:
1258 case OP_LEAVETRY:
5dc0d613 1259 kid = cLISTOPo->op_first;
54310121 1260 list(kid);
155aba94 1261 while ((kid = kid->op_sibling)) {
54310121 1262 if (kid->op_sibling)
1263 scalarvoid(kid);
1264 else
1265 list(kid);
1266 }
3280af22 1267 WITH_THR(PL_curcop = &PL_compiling);
54310121 1268 break;
748a9306 1269 case OP_SCOPE:
79072805 1270 case OP_LINESEQ:
11343788 1271 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1272 if (kid->op_sibling)
1273 scalarvoid(kid);
1274 else
1275 list(kid);
1276 }
3280af22 1277 WITH_THR(PL_curcop = &PL_compiling);
79072805 1278 break;
c90c0ff4 1279 case OP_REQUIRE:
1280 /* all requires must return a boolean value */
5196be3e
MB		 1281 o->op_flags &= ~OPf_WANT;
1282 return scalar(o);
79072805 1283 }
11343788 1284 return o;
79072805
LW		 1285}
1286
1287OP *
864dbfa3 1288Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1289{
1290 OP *kid;
1291
11343788
MB		 1292 if (o) {
1293 if (o->op_type == OP_LINESEQ ||
1294 o->op_type == OP_SCOPE ||
1295 o->op_type == OP_LEAVE ||
1296 o->op_type == OP_LEAVETRY)
463ee0b2 1297 {
0f15f207 1298 dTHR;
11343788 1299 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1300 if (kid->op_sibling) {
463ee0b2 1301 scalarvoid(kid);
ed6116ce 1302 }
463ee0b2 1303 }
3280af22 1304 PL_curcop = &PL_compiling;
79072805 1305 }
11343788 1306 o->op_flags &= ~OPf_PARENS;
3280af22 1307 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1308 o->op_flags |= OPf_PARENS;
79072805 1309 }
8990e307 1310 else
11343788
MB		 1311 o = newOP(OP_STUB, 0);
1312 return o;
79072805
LW		 1313}
1314
76e3520e 1315STATIC OP *
cea2e8a9 1316S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1317{
1318 OP *kid;
11343788
MB		 1319 if (o && o->op_flags & OPf_KIDS) {
1320 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1321 mod(kid, type);
79072805 1322 }
11343788 1323 return o;
79072805
LW		 1324}
1325
79072805 1326OP *
864dbfa3 1327Perl_mod(pTHX_ OP *o, I32 type)
79072805 1328{
11343788 1329 dTHR;
79072805 1330 OP *kid;
2d8e6c8d 1331 STRLEN n_a;
79072805 1332
3280af22 1333 if (!o || PL_error_count)
11343788 1334 return o;
79072805 1335
b162f9ea 1336 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1337 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1338 {
b162f9ea 1339 return o;
7e363e51 1340 }
b162f9ea 1341
11343788 1342 switch (o->op_type) {
68dc0745 1343 case OP_UNDEF:
3280af22 1344 PL_modcount++;
5dc0d613 1345 return o;
a0d0e21e 1346 case OP_CONST:
11343788 1347 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1348 goto nomod;
3280af22 1349 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1350 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1351 PL_eval_start = 0;
a0d0e21e
LW		 1352 }
1353 else if (!type) {
3280af22
NIS		 1354 SAVEI32(PL_compiling.cop_arybase);
1355 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1356 }
1357 else if (type == OP_REFGEN)
1358 goto nomod;
1359 else
cea2e8a9 1360 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1361 break;
5f05dabc 1362 case OP_STUB:
5196be3e 1363 if (o->op_flags & OPf_PARENS)
5f05dabc 1364 break;
1365 goto nomod;
a0d0e21e
LW		 1366 case OP_ENTERSUB:
1367 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1368 !(o->op_flags & OPf_STACKED)) {
1369 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1370 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1371 assert(cUNOPo->op_first->op_type == OP_NULL);
1372 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1373 break;
1374 }
cd06dffe
GS		 1375 else { /* lvalue subroutine call */
1376 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1377 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1378 /* Backward compatibility mode: */
1379 o->op_private |= OPpENTERSUB_INARGS;
1380 break;
1381 }
1382 else { /* Compile-time error message: */
1383 OP *kid = cUNOPo->op_first;
1384 CV *cv;
1385 OP *okid;
1386
1387 if (kid->op_type == OP_PUSHMARK)
1388 goto skip_kids;
1389 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1390 Perl_croak(aTHX_
1391 "panic: unexpected lvalue entersub "
1392 "args: type/targ %ld:%ld",
1393 (long)kid->op_type,kid->op_targ);
1394 kid = kLISTOP->op_first;
1395 skip_kids:
1396 while (kid->op_sibling)
1397 kid = kid->op_sibling;
1398 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1399 /* Indirect call */
1400 if (kid->op_type == OP_METHOD_NAMED
1401 || kid->op_type == OP_METHOD)
1402 {
87d7fd28 1403 UNOP *newop;
cd06dffe
GS		 1404
1405 if (kid->op_sibling || kid->op_next != kid) {
1406 yyerror("panic: unexpected optree near method call");
1407 break;
1408 }
1409
87d7fd28 1410 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1411 newop->op_type = OP_RV2CV;
1412 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1413 newop->op_first = Nullop;
1414 newop->op_next = (OP*)newop;
1415 kid->op_sibling = (OP*)newop;
349fd7b7 1416 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1417 break;
1418 }
1419
1420 if (kid->op_type != OP_RV2CV)
1421 Perl_croak(aTHX_
1422 "panic: unexpected lvalue entersub "
1423 "entry via type/targ %ld:%ld",
1424 (long)kid->op_type,kid->op_targ);
1425 kid->op_private |= OPpLVAL_INTRO;
1426 break; /* Postpone until runtime */
1427 }
1428
1429 okid = kid;
1430 kid = kUNOP->op_first;
1431 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1432 kid = kUNOP->op_first;
1433 if (kid->op_type == OP_NULL)
1434 Perl_croak(aTHX_
1435 "Unexpected constant lvalue entersub "
1436 "entry via type/targ %ld:%ld",
1437 (long)kid->op_type,kid->op_targ);
1438 if (kid->op_type != OP_GV) {
1439 /* Restore RV2CV to check lvalueness */
1440 restore_2cv:
1441 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1442 okid->op_next = kid->op_next;
1443 kid->op_next = okid;
1444 }
1445 else
1446 okid->op_next = Nullop;
1447 okid->op_type = OP_RV2CV;
1448 okid->op_targ = 0;
1449 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1450 okid->op_private |= OPpLVAL_INTRO;
1451 break;
1452 }
1453
638eceb6 1454 cv = GvCV(kGVOP_gv);
cd06dffe
GS		 1455 if (!cv)
1456 goto restore_2cv;
1457 if (CvLVALUE(cv))
1458 break;
1459 }
1460 }
79072805
LW		 1461 /* FALL THROUGH */
1462 default:
a0d0e21e
LW		 1463 nomod:
1464 /* grep, foreach, subcalls, refgen */
1465 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1466 break;
cea2e8a9 1467 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1468 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1469 ? "do block"
1470 : (o->op_type == OP_ENTERSUB
1471 ? "non-lvalue subroutine call"
1472 : PL_op_desc[o->op_type])),
22c35a8c 1473 type ? PL_op_desc[type] : "local"));
11343788 1474 return o;
79072805 1475
a0d0e21e
LW		 1476 case OP_PREINC:
1477 case OP_PREDEC:
1478 case OP_POW:
1479 case OP_MULTIPLY:
1480 case OP_DIVIDE:
1481 case OP_MODULO:
1482 case OP_REPEAT:
1483 case OP_ADD:
1484 case OP_SUBTRACT:
1485 case OP_CONCAT:
1486 case OP_LEFT_SHIFT:
1487 case OP_RIGHT_SHIFT:
1488 case OP_BIT_AND:
1489 case OP_BIT_XOR:
1490 case OP_BIT_OR:
1491 case OP_I_MULTIPLY:
1492 case OP_I_DIVIDE:
1493 case OP_I_MODULO:
1494 case OP_I_ADD:
1495 case OP_I_SUBTRACT:
11343788 1496 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1497 goto nomod;
3280af22 1498 PL_modcount++;
a0d0e21e
LW		 1499 break;
1500
79072805 1501 case OP_COND_EXPR:
11343788 1502 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1503 mod(kid, type);
79072805
LW		 1504 break;
1505
1506 case OP_RV2AV:
1507 case OP_RV2HV:
93af7a87 1508 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1509 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1510 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1511 PL_modcount = 10000;
11343788 1512 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1513 }
1514 /* FALL THROUGH */
79072805 1515 case OP_RV2GV:
5dc0d613 1516 if (scalar_mod_type(o, type))
3fe9a6f1 1517 goto nomod;
11343788 1518 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1519 /* FALL THROUGH */
1520 case OP_AASSIGN:
1521 case OP_ASLICE:
1522 case OP_HSLICE:
93a17b20
LW		 1523 case OP_NEXTSTATE:
1524 case OP_DBSTATE:
a0d0e21e
LW		 1525 case OP_REFGEN:
1526 case OP_CHOMP:
3280af22 1527 PL_modcount = 10000;
79072805 1528 break;
463ee0b2 1529 case OP_RV2SV:
11343788 1530 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1531 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1532 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1533 /* FALL THROUGH */
79072805 1534 case OP_GV:
463ee0b2 1535 case OP_AV2ARYLEN:
3280af22 1536 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1537 case OP_SASSIGN:
bf4b1e52
GS		 1538 case OP_ANDASSIGN:
1539 case OP_ORASSIGN:
8990e307 1540 case OP_AELEMFAST:
3280af22 1541 PL_modcount++;
8990e307
LW		 1542 break;
1543
748a9306
LW		 1544 case OP_PADAV:
1545 case OP_PADHV:
3280af22 1546 PL_modcount = 10000;
5196be3e
MB		 1547 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1548 return o; /* Treat \(@foo) like ordinary list. */
1549 if (scalar_mod_type(o, type))
3fe9a6f1 1550 goto nomod;
748a9306
LW		 1551 /* FALL THROUGH */
1552 case OP_PADSV:
3280af22 1553 PL_modcount++;
748a9306 1554 if (!type)
cea2e8a9 1555 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1556 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1557 break;
1558
554b3eca 1559#ifdef USE_THREADS
2faa37cc 1560 case OP_THREADSV:
533c011a 1561 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1562 break;
1563#endif /* USE_THREADS */
1564
748a9306
LW		 1565 case OP_PUSHMARK:
1566 break;
a0d0e21e 1567
69969c6f
SB		 1568 case OP_KEYS:
1569 if (type != OP_SASSIGN)
1570 goto nomod;
5d82c453
GA		 1571 goto lvalue_func;
1572 case OP_SUBSTR:
1573 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1574 goto nomod;
5f05dabc 1575 /* FALL THROUGH */
a0d0e21e 1576 case OP_POS:
463ee0b2 1577 case OP_VEC:
5d82c453 1578 lvalue_func:
11343788
MB		 1579 pad_free(o->op_targ);
1580 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1581 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1582 if (o->op_flags & OPf_KIDS)
1583 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1584 break;
a0d0e21e 1585
463ee0b2
LW		 1586 case OP_AELEM:
1587 case OP_HELEM:
11343788 1588 ref(cBINOPo->op_first, o->op_type);
68dc0745 1589 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1590 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1591 o->op_private |= OPpLVAL_DEFER;
3280af22 1592 PL_modcount++;
463ee0b2
LW		 1593 break;
1594
1595 case OP_SCOPE:
1596 case OP_LEAVE:
1597 case OP_ENTER:
11343788
MB		 1598 if (o->op_flags & OPf_KIDS)
1599 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1600 break;
1601
1602 case OP_NULL:
638bc118
GS		 1603 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1604 goto nomod;
1605 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1606 break;
11343788
MB		 1607 if (o->op_targ != OP_LIST) {
1608 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1609 break;
1610 }
1611 /* FALL THROUGH */
463ee0b2 1612 case OP_LIST:
11343788 1613 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1614 mod(kid, type);
1615 break;
1616 }
11343788 1617 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1618
1619 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1620 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1621 else if (!type) {
11343788
MB		 1622 o->op_private |= OPpLVAL_INTRO;
1623 o->op_flags &= ~OPf_SPECIAL;
3280af22 1624 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1625 }
a0d0e21e 1626 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1627 o->op_flags |= OPf_REF;
1628 return o;
463ee0b2
LW		 1629}
1630
864dbfa3 1631STATIC bool
cea2e8a9 1632S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1633{
1634 switch (type) {
1635 case OP_SASSIGN:
5196be3e 1636 if (o->op_type == OP_RV2GV)
3fe9a6f1 1637 return FALSE;
1638 /* FALL THROUGH */
1639 case OP_PREINC:
1640 case OP_PREDEC:
1641 case OP_POSTINC:
1642 case OP_POSTDEC:
1643 case OP_I_PREINC:
1644 case OP_I_PREDEC:
1645 case OP_I_POSTINC:
1646 case OP_I_POSTDEC:
1647 case OP_POW:
1648 case OP_MULTIPLY:
1649 case OP_DIVIDE:
1650 case OP_MODULO:
1651 case OP_REPEAT:
1652 case OP_ADD:
1653 case OP_SUBTRACT:
1654 case OP_I_MULTIPLY:
1655 case OP_I_DIVIDE:
1656 case OP_I_MODULO:
1657 case OP_I_ADD:
1658 case OP_I_SUBTRACT:
1659 case OP_LEFT_SHIFT:
1660 case OP_RIGHT_SHIFT:
1661 case OP_BIT_AND:
1662 case OP_BIT_XOR:
1663 case OP_BIT_OR:
1664 case OP_CONCAT:
1665 case OP_SUBST:
1666 case OP_TRANS:
49e9fbe6
GS		 1667 case OP_READ:
1668 case OP_SYSREAD:
1669 case OP_RECV:
bf4b1e52
GS		 1670 case OP_ANDASSIGN:
1671 case OP_ORASSIGN:
3fe9a6f1 1672 return TRUE;
1673 default:
1674 return FALSE;
1675 }
1676}
1677
35cd451c 1678STATIC bool
cea2e8a9 1679S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1680{
1681 switch (o->op_type) {
1682 case OP_PIPE_OP:
1683 case OP_SOCKPAIR:
1684 if (argnum == 2)
1685 return TRUE;
1686 /* FALL THROUGH */
1687 case OP_SYSOPEN:
1688 case OP_OPEN:
ded8aa31 1689 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1690 case OP_SOCKET:
1691 case OP_OPEN_DIR:
1692 case OP_ACCEPT:
1693 if (argnum == 1)
1694 return TRUE;
1695 /* FALL THROUGH */
1696 default:
1697 return FALSE;
1698 }
1699}
1700
463ee0b2 1701OP *
864dbfa3 1702Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1703{
1704 OP *kid;
11343788
MB		 1705 if (o && o->op_flags & OPf_KIDS) {
1706 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1707 ref(kid, type);
1708 }
11343788 1709 return o;
463ee0b2
LW		 1710}
1711
1712OP *
864dbfa3 1713Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1714{
1715 OP *kid;
463ee0b2 1716
3280af22 1717 if (!o || PL_error_count)
11343788 1718 return o;
463ee0b2 1719
11343788 1720 switch (o->op_type) {
a0d0e21e 1721 case OP_ENTERSUB:
afebc493 1722 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1723 !(o->op_flags & OPf_STACKED)) {
1724 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1725 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1726 assert(cUNOPo->op_first->op_type == OP_NULL);
1727 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1728 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1729 }
1730 break;
aeea060c 1731
463ee0b2 1732 case OP_COND_EXPR:
11343788 1733 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1734 ref(kid, type);
1735 break;
8990e307 1736 case OP_RV2SV:
35cd451c
GS		 1737 if (type == OP_DEFINED)
1738 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1739 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1740 /* FALL THROUGH */
1741 case OP_PADSV:
5f05dabc 1742 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1743 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1744 : type == OP_RV2HV ? OPpDEREF_HV
1745 : OPpDEREF_SV);
11343788 1746 o->op_flags |= OPf_MOD;
a0d0e21e 1747 }
8990e307
LW		 1748 break;
1749
2faa37cc 1750 case OP_THREADSV:
a863c7d1
MB		 1751 o->op_flags |= OPf_MOD; /* XXX ??? */
1752 break;
1753
463ee0b2
LW		 1754 case OP_RV2AV:
1755 case OP_RV2HV:
aeea060c 1756 o->op_flags |= OPf_REF;
8990e307 1757 /* FALL THROUGH */
463ee0b2 1758 case OP_RV2GV:
35cd451c
GS		 1759 if (type == OP_DEFINED)
1760 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1761 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1762 break;
8990e307 1763
463ee0b2
LW		 1764 case OP_PADAV:
1765 case OP_PADHV:
aeea060c 1766 o->op_flags |= OPf_REF;
79072805 1767 break;
aeea060c 1768
8990e307 1769 case OP_SCALAR:
79072805 1770 case OP_NULL:
11343788 1771 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1772 break;
11343788 1773 ref(cBINOPo->op_first, type);
79072805
LW		 1774 break;
1775 case OP_AELEM:
1776 case OP_HELEM:
11343788 1777 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1778 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1779 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1780 : type == OP_RV2HV ? OPpDEREF_HV
1781 : OPpDEREF_SV);
11343788 1782 o->op_flags |= OPf_MOD;
8990e307 1783 }
79072805
LW		 1784 break;
1785
463ee0b2 1786 case OP_SCOPE:
79072805
LW		 1787 case OP_LEAVE:
1788 case OP_ENTER:
8990e307 1789 case OP_LIST:
11343788 1790 if (!(o->op_flags & OPf_KIDS))
79072805 1791 break;
11343788 1792 ref(cLISTOPo->op_last, type);
79072805 1793 break;
a0d0e21e
LW		 1794 default:
1795 break;
79072805 1796 }
11343788 1797 return scalar(o);
8990e307 1798
79072805
LW		 1799}
1800
09bef843
SB		 1801STATIC OP *
1802S_dup_attrlist(pTHX_ OP *o)
1803{
1804 OP *rop = Nullop;
1805
1806 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1807 * where the first kid is OP_PUSHMARK and the remaining ones
1808 * are OP_CONST. We need to push the OP_CONST values.
1809 */
1810 if (o->op_type == OP_CONST)
1811 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1812 else {
1813 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1814 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1815 if (o->op_type == OP_CONST)
1816 rop = append_elem(OP_LIST, rop,
1817 newSVOP(OP_CONST, o->op_flags,
1818 SvREFCNT_inc(cSVOPo->op_sv)));
1819 }
1820 }
1821 return rop;
1822}
1823
1824STATIC void
1825S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1826{
09bef843
SB		 1827 SV *stashsv;
1828
1829 /* fake up C<use attributes $pkg,$rv,@attrs> */
1830 ENTER; /* need to protect against side-effects of 'use' */
1831 SAVEINT(PL_expect);
1832 if (stash && HvNAME(stash))
1833 stashsv = newSVpv(HvNAME(stash), 0);
1834 else
1835 stashsv = &PL_sv_no;
e4783991 1836
09bef843 1837#define ATTRSMODULE "attributes"
e4783991
GS		 1838
1839 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1840 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1841 Nullsv,
1842 prepend_elem(OP_LIST,
1843 newSVOP(OP_CONST, 0, stashsv),
1844 prepend_elem(OP_LIST,
1845 newSVOP(OP_CONST, 0,
1846 newRV(target)),
1847 dup_attrlist(attrs))));
09bef843
SB		 1848 LEAVE;
1849}
1850
1851STATIC OP *
1852S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1853{
1854 OP *kid;
93a17b20
LW		 1855 I32 type;
1856
3280af22 1857 if (!o || PL_error_count)
11343788 1858 return o;
93a17b20 1859
11343788 1860 type = o->op_type;
93a17b20 1861 if (type == OP_LIST) {
11343788 1862 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1863 my_kid(kid, attrs);
dab48698 1864 } else if (type == OP_UNDEF) {
7766148a 1865 return o;
77ca0c92
LW		 1866 } else if (type == OP_RV2SV || /* "our" declaration */
1867 type == OP_RV2AV ||
1868 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1869 o->op_private |= OPpOUR_INTRO;
77ca0c92 1870 return o;
dab48698 1871 } else if (type != OP_PADSV &&
93a17b20
LW		 1872 type != OP_PADAV &&
1873 type != OP_PADHV &&
1874 type != OP_PUSHMARK)
1875 {
eb64745e
GS		 1876 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1877 PL_op_desc[o->op_type],
1878 PL_in_my == KEY_our ? "our" : "my"));
11343788 1879 return o;
93a17b20 1880 }
09bef843
SB		 1881 else if (attrs && type != OP_PUSHMARK) {
1882 HV *stash;
1883 SV *padsv;
1884 SV **namesvp;
1885
eb64745e
GS		 1886 PL_in_my = FALSE;
1887 PL_in_my_stash = Nullhv;
1888
09bef843
SB		 1889 /* check for C<my Dog $spot> when deciding package */
1890 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1891 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1892 stash = SvSTASH(*namesvp);
1893 else
1894 stash = PL_curstash;
1895 padsv = PAD_SV(o->op_targ);
1896 apply_attrs(stash, padsv, attrs);
1897 }
11343788
MB		 1898 o->op_flags |= OPf_MOD;
1899 o->op_private |= OPpLVAL_INTRO;
1900 return o;
93a17b20
LW		 1901}
1902
1903OP *
09bef843
SB		 1904Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1905{
1906 if (o->op_flags & OPf_PARENS)
1907 list(o);
09bef843
SB		 1908 if (attrs)
1909 SAVEFREEOP(attrs);
eb64745e
GS		 1910 o = my_kid(o, attrs);
1911 PL_in_my = FALSE;
1912 PL_in_my_stash = Nullhv;
1913 return o;
09bef843
SB		 1914}
1915
1916OP *
1917Perl_my(pTHX_ OP *o)
1918{
1919 return my_kid(o, Nullop);
1920}
1921
1922OP *
864dbfa3 1923Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1924{
1925 if (o)
1926 o->op_flags |= OPf_PARENS;
1927 return o;
1928}
1929
1930OP *
864dbfa3 1931Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1932{
d008e5eb 1933 dTHR;
11343788 1934 OP *o;
79072805 1935
e476b1b5 1936 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1937 (left->op_type == OP_RV2AV ||
1938 left->op_type == OP_RV2HV ||
1939 left->op_type == OP_PADAV ||
1940 left->op_type == OP_PADHV)) {
22c35a8c 1941 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1942 right->op_type == OP_TRANS)
1943 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1944 const char *sample = ((left->op_type == OP_RV2AV ||
1945 left->op_type == OP_PADAV)
1946 ? "@array" : "%hash");
e476b1b5 1947 Perl_warner(aTHX_ WARN_MISC,
599cee73
PM		 1948 "Applying %s to %s will act on scalar(%s)",
1949 desc, sample, sample);
2ae324a7 1950 }
1951
79072805
LW		 1952 if (right->op_type == OP_MATCH ||
1953 right->op_type == OP_SUBST ||
1954 right->op_type == OP_TRANS) {
1955 right->op_flags |= OPf_STACKED;
1956 if (right->op_type != OP_MATCH)
463ee0b2 1957 left = mod(left, right->op_type);
79072805 1958 if (right->op_type == OP_TRANS)
11343788 1959 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1960 else
11343788 1961 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1962 if (type == OP_NOT)
11343788
MB		 1963 return newUNOP(OP_NOT, 0, scalar(o));
1964 return o;
79072805
LW		 1965 }
1966 else
1967 return bind_match(type, left,
1968 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1969}
1970
1971OP *
864dbfa3 1972Perl_invert(pTHX_ OP *o)
79072805 1973{
11343788
MB		 1974 if (!o)
1975 return o;
79072805 1976 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1977 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1978}
1979
1980OP *
864dbfa3 1981Perl_scope(pTHX_ OP *o)
79072805
LW		 1982{
1983 if (o) {
3280af22 1984 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1985 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1986 o->op_type = OP_LEAVE;
22c35a8c 1987 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1988 }
1989 else {
1990 if (o->op_type == OP_LINESEQ) {
1991 OP *kid;
1992 o->op_type = OP_SCOPE;
22c35a8c 1993 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 1994 kid = ((LISTOP*)o)->op_first;
1995 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
1996 null(kid);
463ee0b2
LW		 1997 }
1998 else
748a9306 1999 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2000 }
79072805
LW		 2001 }
2002 return o;
2003}
2004
b3ac6de7 2005void
864dbfa3 2006Perl_save_hints(pTHX)
b3ac6de7 2007{
3280af22
NIS		 2008 SAVEI32(PL_hints);
2009 SAVESPTR(GvHV(PL_hintgv));
2010 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2011 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2012}
2013
a0d0e21e 2014int
864dbfa3 2015Perl_block_start(pTHX_ int full)
79072805 2016{
11343788 2017 dTHR;
3280af22 2018 int retval = PL_savestack_ix;
b3ac6de7 2019
3280af22 2020 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2021 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2022 if (full)
2023 PL_comppad_name_fill = PL_comppad_name_floor;
2024 if (PL_comppad_name_floor < 0)
2025 PL_comppad_name_floor = 0;
3280af22
NIS		 2026 SAVEI32(PL_min_intro_pending);
2027 SAVEI32(PL_max_intro_pending);
2028 PL_min_intro_pending = 0;
2029 SAVEI32(PL_comppad_name_fill);
2030 SAVEI32(PL_padix_floor);
2031 PL_padix_floor = PL_padix;
2032 PL_pad_reset_pending = FALSE;
b3ac6de7 2033 SAVEHINTS();
3280af22 2034 PL_hints &= ~HINT_BLOCK_SCOPE;
7766f137 2035 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2036 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2037 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2038 SAVEFREESV(PL_compiling.cop_warnings) ;
2039 }
a0d0e21e
LW		 2040 return retval;
2041}
2042
2043OP*
864dbfa3 2044Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2045{
11343788 2046 dTHR;
3280af22 2047 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2048 OP* retval = scalarseq(seq);
a0d0e21e 2049 LEAVE_SCOPE(floor);
3280af22 2050 PL_pad_reset_pending = FALSE;
e24b16f9 2051 PL_compiling.op_private = PL_hints;
a0d0e21e 2052 if (needblockscope)
3280af22
NIS		 2053 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2054 pad_leavemy(PL_comppad_name_fill);
2055 PL_cop_seqmax++;
a0d0e21e
LW		 2056 return retval;
2057}
2058
76e3520e 2059STATIC OP *
cea2e8a9 2060S_newDEFSVOP(pTHX)
54b9620d
MB		 2061{
2062#ifdef USE_THREADS
2063 OP *o = newOP(OP_THREADSV, 0);
2064 o->op_targ = find_threadsv("_");
2065 return o;
2066#else
3280af22 2067 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2068#endif /* USE_THREADS */
2069}
2070
a0d0e21e 2071void
864dbfa3 2072Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2073{
11343788 2074 dTHR;
3280af22 2075 if (PL_in_eval) {
b295d113
TH		 2076 if (PL_eval_root)
2077 return;
faef0170
HS		 2078 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2079 ((PL_in_eval & EVAL_KEEPERR)
2080 ? OPf_SPECIAL : 0), o);
3280af22 2081 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2082 PL_eval_root->op_private |= OPpREFCOUNTED;
2083 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2084 PL_eval_root->op_next = 0;
2085 peep(PL_eval_start);
a0d0e21e
LW		 2086 }
2087 else {
5dc0d613 2088 if (!o)
a0d0e21e 2089 return;
3280af22
NIS		 2090 PL_main_root = scope(sawparens(scalarvoid(o)));
2091 PL_curcop = &PL_compiling;
2092 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2093 PL_main_root->op_private |= OPpREFCOUNTED;
2094 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2095 PL_main_root->op_next = 0;
2096 peep(PL_main_start);
2097 PL_compcv = 0;
3841441e 2098
4fdae800 2099 /* Register with debugger */
84902520 2100 if (PERLDB_INTER) {
864dbfa3 2101 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2102 if (cv) {
2103 dSP;
924508f0 2104 PUSHMARK(SP);
cc49e20b 2105 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2106 PUTBACK;
864dbfa3 2107 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2108 }
2109 }
79072805 2110 }
79072805
LW		 2111}
2112
2113OP *
864dbfa3 2114Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2115{
2116 if (o->op_flags & OPf_PARENS)
2117 list(o);
8990e307 2118 else {
d008e5eb 2119 dTHR;
599cee73 2120 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2121 char *s;
834a4ddd 2122 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2123 if (*s == ';' || *s == '=')
eb64745e
GS		 2124 Perl_warner(aTHX_ WARN_PARENTHESIS,
2125 "Parentheses missing around \"%s\" list",
2126 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2127 }
2128 }
93a17b20 2129 if (lex)
eb64745e 2130 o = my(o);
93a17b20 2131 else
eb64745e
GS		 2132 o = mod(o, OP_NULL); /* a bit kludgey */
2133 PL_in_my = FALSE;
2134 PL_in_my_stash = Nullhv;
2135 return o;
79072805
LW		 2136}
2137
2138OP *
864dbfa3 2139Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2140{
2141 if (o->op_type == OP_LIST) {
554b3eca
MB		 2142 OP *o2;
2143#ifdef USE_THREADS
2faa37cc 2144 o2 = newOP(OP_THREADSV, 0);
54b9620d 2145 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2146#else
2147 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2148#endif /* USE_THREADS */
2149 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2150 }
2151 return o;
2152}
2153
2154OP *
864dbfa3 2155Perl_fold_constants(pTHX_ register OP *o)
79072805 2156{
11343788 2157 dTHR;
79072805
LW		 2158 register OP *curop;
2159 I32 type = o->op_type;
748a9306 2160 SV *sv;
79072805 2161
22c35a8c 2162 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2163 scalar(o);
b162f9ea 2164 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2165 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2166
eac055e9
GS		 2167 /* integerize op, unless it happens to be C<-foo>.
2168 * XXX should pp_i_negate() do magic string negation instead? */
2169 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2170 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2171 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2172 {
22c35a8c 2173 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2174 }
85e6fe83 2175
22c35a8c 2176 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2177 goto nope;
2178
de939608 2179 switch (type) {
7a52d87a
GS		 2180 case OP_NEGATE:
2181 /* XXX might want a ck_negate() for this */
2182 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2183 break;
de939608
CS		 2184 case OP_SPRINTF:
2185 case OP_UCFIRST:
2186 case OP_LCFIRST:
2187 case OP_UC:
2188 case OP_LC:
69dcf70c
MB		 2189 case OP_SLT:
2190 case OP_SGT:
2191 case OP_SLE:
2192 case OP_SGE:
2193 case OP_SCMP:
2194
de939608
CS		 2195 if (o->op_private & OPpLOCALE)
2196 goto nope;
2197 }
2198
3280af22 2199 if (PL_error_count)
a0d0e21e
LW		 2200 goto nope; /* Don't try to run w/ errors */
2201
79072805 2202 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2203 if ((curop->op_type != OP_CONST ||
2204 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2205 curop->op_type != OP_LIST &&
2206 curop->op_type != OP_SCALAR &&
2207 curop->op_type != OP_NULL &&
2208 curop->op_type != OP_PUSHMARK)
2209 {
79072805
LW		 2210 goto nope;
2211 }
2212 }
2213
2214 curop = LINKLIST(o);
2215 o->op_next = 0;
533c011a 2216 PL_op = curop;
cea2e8a9 2217 CALLRUNOPS(aTHX);
3280af22 2218 sv = *(PL_stack_sp--);
748a9306 2219 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2220 pad_swipe(o->op_targ);
748a9306
LW		 2221 else if (SvTEMP(sv)) { /* grab mortal temp? */
2222 (void)SvREFCNT_inc(sv);
2223 SvTEMP_off(sv);
85e6fe83 2224 }
79072805
LW		 2225 op_free(o);
2226 if (type == OP_RV2GV)
b1cb66bf 2227 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2228 else {
ee580363
GS		 2229 /* try to smush double to int, but don't smush -2.0 to -2 */
2230 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2231 type != OP_NEGATE)
2232 {
748a9306 2233 IV iv = SvIV(sv);
65202027 2234 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2235 SvREFCNT_dec(sv);
2236 sv = newSViv(iv);
2237 }
b1cb66bf 2238 else
2239 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2240 }
2241 return newSVOP(OP_CONST, 0, sv);
2242 }
aeea060c 2243
79072805 2244 nope:
22c35a8c 2245 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2246 return o;
79072805 2247
3280af22 2248 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2249 if (type == OP_MODULO
2250 || type == OP_DIVIDE
2251 || !(o->op_flags & OPf_KIDS))
2252 {
85e6fe83 2253 return o;
4bb9f687 2254 }
85e6fe83
LW		 2255
2256 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2257 if (curop->op_type == OP_CONST) {
b1cb66bf 2258 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2259 continue;
2260 return o;
2261 }
22c35a8c 2262 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2263 continue;
2264 return o;
2265 }
22c35a8c 2266 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2267 }
2268
79072805
LW		 2269 return o;
2270}
2271
2272OP *
864dbfa3 2273Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2274{
11343788 2275 dTHR;
79072805 2276 register OP *curop;
3280af22 2277 I32 oldtmps_floor = PL_tmps_floor;
79072805 2278
a0d0e21e 2279 list(o);
3280af22 2280 if (PL_error_count)
a0d0e21e
LW		 2281 return o; /* Don't attempt to run with errors */
2282
533c011a 2283 PL_op = curop = LINKLIST(o);
a0d0e21e 2284 o->op_next = 0;
7d4045d4 2285 peep(curop);
cea2e8a9
GS		 2286 pp_pushmark();
2287 CALLRUNOPS(aTHX);
533c011a 2288 PL_op = curop;
cea2e8a9 2289 pp_anonlist();
3280af22 2290 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2291
2292 o->op_type = OP_RV2AV;
22c35a8c 2293 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2294 curop = ((UNOP*)o)->op_first;
3280af22 2295 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2296 op_free(curop);
79072805
LW		 2297 linklist(o);
2298 return list(o);
2299}
2300
2301OP *
864dbfa3 2302Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2303{
2304 OP *kid;
a0d0e21e 2305 OP *last = 0;
79072805 2306
11343788
MB		 2307 if (!o || o->op_type != OP_LIST)
2308 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2309 else
5dc0d613 2310 o->op_flags &= ~OPf_WANT;
79072805 2311
22c35a8c 2312 if (!(PL_opargs[type] & OA_MARK))
11343788 2313 null(cLISTOPo->op_first);
8990e307 2314
11343788 2315 o->op_type = type;
22c35a8c 2316 o->op_ppaddr = PL_ppaddr[type];
11343788 2317 o->op_flags |= flags;
79072805 2318
11343788
MB		 2319 o = CHECKOP(type, o);
2320 if (o->op_type != type)
2321 return o;
79072805 2322
11343788 2323 if (cLISTOPo->op_children < 7) {
79072805 2324 /* XXX do we really need to do this if we're done appending?? */
11343788 2325 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2326 last = kid;
11343788 2327 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2328 }
2329
11343788 2330 return fold_constants(o);
79072805
LW		 2331}
2332
2333/* List constructors */
2334
2335OP *
864dbfa3 2336Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2337{
2338 if (!first)
2339 return last;
8990e307
LW		 2340
2341 if (!last)
79072805 2342 return first;
8990e307 2343
155aba94
GS		 2344 if (first->op_type != type
2345 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2346 {
2347 return newLISTOP(type, 0, first, last);
2348 }
79072805 2349
a0d0e21e
LW		 2350 if (first->op_flags & OPf_KIDS)
2351 ((LISTOP*)first)->op_last->op_sibling = last;
2352 else {
2353 first->op_flags |= OPf_KIDS;
2354 ((LISTOP*)first)->op_first = last;
2355 }
2356 ((LISTOP*)first)->op_last = last;
2357 ((LISTOP*)first)->op_children++;
2358 return first;
79072805
LW		 2359}
2360
2361OP *
864dbfa3 2362Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2363{
2364 if (!first)
2365 return (OP*)last;
8990e307
LW		 2366
2367 if (!last)
79072805 2368 return (OP*)first;
8990e307
LW		 2369
2370 if (first->op_type != type)
79072805 2371 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2372
2373 if (last->op_type != type)
79072805
LW		 2374 return append_elem(type, (OP*)first, (OP*)last);
2375
2376 first->op_last->op_sibling = last->op_first;
2377 first->op_last = last->op_last;
2378 first->op_children += last->op_children;
2379 if (first->op_children)
acb74605 2380 first->op_flags |= OPf_KIDS;
b7dc083c
NIS		 2381
2382#ifdef PL_OP_SLAB_ALLOC
2383#else
2384 Safefree(last);
2385#endif
79072805
LW		 2386 return (OP*)first;
2387}
2388
2389OP *
864dbfa3 2390Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2391{
2392 if (!first)
2393 return last;
8990e307
LW		 2394
2395 if (!last)
79072805 2396 return first;
8990e307
LW		 2397
2398 if (last->op_type == type) {
2399 if (type == OP_LIST) { /* already a PUSHMARK there */
2400 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2401 ((LISTOP*)last)->op_first->op_sibling = first;
2402 }
2403 else {
2404 if (!(last->op_flags & OPf_KIDS)) {
2405 ((LISTOP*)last)->op_last = first;
2406 last->op_flags |= OPf_KIDS;
2407 }
2408 first->op_sibling = ((LISTOP*)last)->op_first;
2409 ((LISTOP*)last)->op_first = first;
79072805 2410 }
79072805
LW		 2411 ((LISTOP*)last)->op_children++;
2412 return last;
2413 }
2414
2415 return newLISTOP(type, 0, first, last);
2416}
2417
2418/* Constructors */
2419
2420OP *
864dbfa3 2421Perl_newNULLLIST(pTHX)
79072805 2422{
8990e307
LW		 2423 return newOP(OP_STUB, 0);
2424}
2425
2426OP *
864dbfa3 2427Perl_force_list(pTHX_ OP *o)
8990e307 2428{
11343788
MB		 2429 if (!o || o->op_type != OP_LIST)
2430 o = newLISTOP(OP_LIST, 0, o, Nullop);
2431 null(o);
2432 return o;
79072805
LW		 2433}
2434
2435OP *
864dbfa3 2436Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2437{
2438 LISTOP *listop;
2439
b7dc083c 2440 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2441
2442 listop->op_type = type;
22c35a8c 2443 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2444 listop->op_children = (first != 0) + (last != 0);
2445 listop->op_flags = flags;
79072805
LW		 2446
2447 if (!last && first)
2448 last = first;
2449 else if (!first && last)
2450 first = last;
8990e307
LW		 2451 else if (first)
2452 first->op_sibling = last;
79072805
LW		 2453 listop->op_first = first;
2454 listop->op_last = last;
8990e307
LW		 2455 if (type == OP_LIST) {
2456 OP* pushop;
2457 pushop = newOP(OP_PUSHMARK, 0);
2458 pushop->op_sibling = first;
2459 listop->op_first = pushop;
2460 listop->op_flags |= OPf_KIDS;
2461 if (!last)
2462 listop->op_last = pushop;
2463 }
2464 else if (listop->op_children)
2465 listop->op_flags |= OPf_KIDS;
79072805
LW		 2466
2467 return (OP*)listop;
2468}
2469
2470OP *
864dbfa3 2471Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2472{
11343788 2473 OP *o;
b7dc083c 2474 NewOp(1101, o, 1, OP);
11343788 2475 o->op_type = type;
22c35a8c 2476 o->op_ppaddr = PL_ppaddr[type];
11343788 2477 o->op_flags = flags;
79072805 2478
11343788
MB		 2479 o->op_next = o;
2480 o->op_private = 0 + (flags >> 8);
22c35a8c 2481 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2482 scalar(o);
22c35a8c 2483 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2484 o->op_targ = pad_alloc(type, SVs_PADTMP);
2485 return CHECKOP(type, o);
79072805
LW		 2486}
2487
2488OP *
864dbfa3 2489Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2490{
2491 UNOP *unop;
2492
93a17b20 2493 if (!first)
aeea060c 2494 first = newOP(OP_STUB, 0);
22c35a8c 2495 if (PL_opargs[type] & OA_MARK)
8990e307 2496 first = force_list(first);
93a17b20 2497
b7dc083c 2498 NewOp(1101, unop, 1, UNOP);
79072805 2499 unop->op_type = type;
22c35a8c 2500 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2501 unop->op_first = first;
2502 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2503 unop->op_private = 1 | (flags >> 8);
e50aee73 2504 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2505 if (unop->op_next)
2506 return (OP*)unop;
2507
a0d0e21e 2508 return fold_constants((OP *) unop);
79072805
LW		 2509}
2510
2511OP *
864dbfa3 2512Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2513{
2514 BINOP *binop;
b7dc083c 2515 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2516
2517 if (!first)
2518 first = newOP(OP_NULL, 0);
2519
2520 binop->op_type = type;
22c35a8c 2521 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2522 binop->op_first = first;
2523 binop->op_flags = flags | OPf_KIDS;
2524 if (!last) {
2525 last = first;
c07a80fd 2526 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2527 }
2528 else {
c07a80fd 2529 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2530 first->op_sibling = last;
2531 }
2532
e50aee73 2533 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2534 if (binop->op_next || binop->op_type != type)
79072805
LW		 2535 return (OP*)binop;
2536
7284ab6f 2537 binop->op_last = binop->op_first->op_sibling;
79072805 2538
a0d0e21e 2539 return fold_constants((OP *)binop);
79072805
LW		 2540}
2541
a0ed51b3
LW		 2542static int
2543utf8compare(const void *a, const void *b)
2544{
2545 int i;
2546 for (i = 0; i < 10; i++) {
2547 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2548 return -1;
2549 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2550 return 1;
2551 }
2552 return 0;
2553}
2554
79072805 2555OP *
864dbfa3 2556Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2557{
79072805
LW		 2558 SV *tstr = ((SVOP*)expr)->op_sv;
2559 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2560 STRLEN tlen;
2561 STRLEN rlen;
ec49126f 2562 register U8 *t = (U8*)SvPV(tstr, tlen);
2563 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2564 register I32 i;
2565 register I32 j;
a0ed51b3 2566 I32 del;
79072805 2567 I32 complement;
5d06d08e 2568 I32 squash;
79072805
LW		 2569 register short *tbl;
2570
11343788 2571 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2572 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2573 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2574
a0ed51b3 2575 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2576 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2577 SV* transv = 0;
2578 U8* tend = t + tlen;
2579 U8* rend = r + rlen;
2580 I32 ulen;
2581 U32 tfirst = 1;
2582 U32 tlast = 0;
2583 I32 tdiff;
2584 U32 rfirst = 1;
2585 U32 rlast = 0;
2586 I32 rdiff;
2587 I32 diff;
2588 I32 none = 0;
2589 U32 max = 0;
2590 I32 bits;
2591 I32 grows = 0;
2592 I32 havefinal = 0;
2593 U32 final;
a0ed51b3
LW		 2594 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2595 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2596
2597 if (complement) {
806e7201 2598 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3
LW		 2599 U8** cp;
2600 UV nextmin = 0;
2601 New(1109, cp, tlen, U8*);
2602 i = 0;
79cb57f6 2603 transv = newSVpvn("",0);
a0ed51b3
LW		 2604 while (t < tend) {
2605 cp[i++] = t;
2606 t += UTF8SKIP(t);
2607 if (*t == 0xff) {
2608 t++;
2609 t += UTF8SKIP(t);
2610 }
2611 }
2612 qsort(cp, i, sizeof(U8*), utf8compare);
2613 for (j = 0; j < i; j++) {
2614 U8 *s = cp[j];
2615 UV val = utf8_to_uv(s, &ulen);
2616 s += ulen;
2617 diff = val - nextmin;
2618 if (diff > 0) {
2619 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2620 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2621 if (diff > 1) {
2622 t = uv_to_utf8(tmpbuf, val - 1);
2623 sv_catpvn(transv, "\377", 1);
dfe13c55 2624 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2625 }
2626 }
2627 if (*s == 0xff)
2628 val = utf8_to_uv(s+1, &ulen);
2629 if (val >= nextmin)
2630 nextmin = val + 1;
2631 }
2632 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2633 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2634 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2635 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2636 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2637 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2638 tlen = SvCUR(transv);
2639 tend = t + tlen;
2640 }
2641 else if (!rlen && !del) {
2642 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2643 }
2644 if (!squash) {
2645 if (to_utf && from_utf) { /* only counting characters */
2646 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2647 o->op_private |= OPpTRANS_IDENTICAL;
2648 }
2649 else { /* straight latin-1 translation */
2650 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2651 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2652 o->op_private |= OPpTRANS_IDENTICAL;
2653 }
a0ed51b3
LW		 2654 }
2655
2656 while (t < tend || tfirst <= tlast) {
2657 /* see if we need more "t" chars */
2658 if (tfirst > tlast) {
2659 tfirst = (I32)utf8_to_uv(t, &ulen);
2660 t += ulen;
2661 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2662 tlast = (I32)utf8_to_uv(++t, &ulen);
2663 t += ulen;
2664 }
2665 else
2666 tlast = tfirst;
2667 }
2668
2669 /* now see if we need more "r" chars */
2670 if (rfirst > rlast) {
2671 if (r < rend) {
2672 rfirst = (I32)utf8_to_uv(r, &ulen);
2673 r += ulen;
2674 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2675 rlast = (I32)utf8_to_uv(++r, &ulen);
2676 r += ulen;
2677 }
2678 else
2679 rlast = rfirst;
2680 }
2681 else {
2682 if (!havefinal++)
2683 final = rlast;
2684 rfirst = rlast = 0xffffffff;
2685 }
2686 }
2687
2688 /* now see which range will peter our first, if either. */
2689 tdiff = tlast - tfirst;
2690 rdiff = rlast - rfirst;
2691
2692 if (tdiff <= rdiff)
2693 diff = tdiff;
2694 else
2695 diff = rdiff;
2696
2697 if (rfirst == 0xffffffff) {
2698 diff = tdiff; /* oops, pretend rdiff is infinite */
2699 if (diff > 0)
894356b3
GS		 2700 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2701 (long)tfirst, (long)tlast);
a0ed51b3 2702 else
894356b3 2703 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2704 }
2705 else {
2706 if (diff > 0)
894356b3
GS		 2707 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2708 (long)tfirst, (long)(tfirst + diff),
2709 (long)rfirst);
a0ed51b3 2710 else
894356b3
GS		 2711 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2712 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2713
2714 if (rfirst + diff > max)
2715 max = rfirst + diff;
2716 rfirst += diff + 1;
2717 if (!grows) {
2718 if (rfirst <= 0x80)
2719 ;
2720 else if (rfirst <= 0x800)
2721 grows |= (tfirst < 0x80);
2722 else if (rfirst <= 0x10000)
2723 grows |= (tfirst < 0x800);
2724 else if (rfirst <= 0x200000)
2725 grows |= (tfirst < 0x10000);
2726 else if (rfirst <= 0x4000000)
2727 grows |= (tfirst < 0x200000);
2728 else if (rfirst <= 0x80000000)
2729 grows |= (tfirst < 0x4000000);
2730 }
2731 }
2732 tfirst += diff + 1;
2733 }
2734
2735 none = ++max;
2736 if (del)
2737 del = ++max;
2738
2739 if (max > 0xffff)
2740 bits = 32;
2741 else if (max > 0xff)
2742 bits = 16;
2743 else
2744 bits = 8;
2745
2746 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2747 SvREFCNT_dec(listsv);
2748 if (transv)
2749 SvREFCNT_dec(transv);
2750
2751 if (!del && havefinal)
b448e4fe
JH		 2752 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2753 newSVuv((UV)final), 0);
a0ed51b3
LW		 2754
2755 if (grows && to_utf)
2756 o->op_private |= OPpTRANS_GROWS;
2757
2758 op_free(expr);
2759 op_free(repl);
2760 return o;
2761 }
2762
2763 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2764 if (complement) {
2765 Zero(tbl, 256, short);
2766 for (i = 0; i < tlen; i++)
ec49126f 2767 tbl[t[i]] = -1;
79072805
LW		 2768 for (i = 0, j = 0; i < 256; i++) {
2769 if (!tbl[i]) {
2770 if (j >= rlen) {
a0ed51b3 2771 if (del)
79072805
LW		 2772 tbl[i] = -2;
2773 else if (rlen)
ec49126f 2774 tbl[i] = r[j-1];
79072805
LW		 2775 else
2776 tbl[i] = i;
2777 }
2778 else
ec49126f 2779 tbl[i] = r[j++];
79072805
LW		 2780 }
2781 }
2782 }
2783 else {
a0ed51b3 2784 if (!rlen && !del) {
79072805 2785 r = t; rlen = tlen;
5d06d08e 2786 if (!squash)
4757a243 2787 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2788 }
2789 for (i = 0; i < 256; i++)
2790 tbl[i] = -1;
2791 for (i = 0, j = 0; i < tlen; i++,j++) {
2792 if (j >= rlen) {
a0ed51b3 2793 if (del) {
ec49126f 2794 if (tbl[t[i]] == -1)
2795 tbl[t[i]] = -2;
79072805
LW		 2796 continue;
2797 }
2798 --j;
2799 }
ec49126f 2800 if (tbl[t[i]] == -1)
2801 tbl[t[i]] = r[j];
79072805
LW		 2802 }
2803 }
2804 op_free(expr);
2805 op_free(repl);
2806
11343788 2807 return o;
79072805
LW		 2808}
2809
2810OP *
864dbfa3 2811Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2812{
11343788 2813 dTHR;
79072805
LW		 2814 PMOP *pmop;
2815
b7dc083c 2816 NewOp(1101, pmop, 1, PMOP);
79072805 2817 pmop->op_type = type;
22c35a8c 2818 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2819 pmop->op_flags = flags;
c07a80fd 2820 pmop->op_private = 0 | (flags >> 8);
79072805 2821
3280af22 2822 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2823 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2824 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2825 pmop->op_pmpermflags |= PMf_LOCALE;
2826 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2827
79072805 2828 /* link into pm list */
3280af22
NIS		 2829 if (type != OP_TRANS && PL_curstash) {
2830 pmop->op_pmnext = HvPMROOT(PL_curstash);
2831 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2832 }
2833
2834 return (OP*)pmop;
2835}
2836
2837OP *
864dbfa3 2838Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2839{
5c0ca799 2840 dTHR;
79072805
LW		 2841 PMOP *pm;
2842 LOGOP *rcop;
ce862d02 2843 I32 repl_has_vars = 0;
79072805 2844
11343788
MB		 2845 if (o->op_type == OP_TRANS)
2846 return pmtrans(o, expr, repl);
79072805 2847
3280af22 2848 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2849 pm = (PMOP*)o;
79072805
LW		 2850
2851 if (expr->op_type == OP_CONST) {
463ee0b2 2852 STRLEN plen;
79072805 2853 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2854 char *p = SvPV(pat, plen);
11343788 2855 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2856 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2857 p = SvPV(pat, plen);
79072805
LW		 2858 pm->op_pmflags |= PMf_SKIPWHITE;
2859 }
393fec97 2860 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2861 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2862 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2863 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2864 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2865 op_free(expr);
2866 }
2867 else {
393fec97
GS		 2868 if (PL_hints & HINT_UTF8)
2869 pm->op_pmdynflags |= PMdf_UTF8;
3280af22
NIS		 2870 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2871 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2872 ? OP_REGCRESET
2873 : OP_REGCMAYBE),0,expr);
463ee0b2 2874
b7dc083c 2875 NewOp(1101, rcop, 1, LOGOP);
79072805 2876 rcop->op_type = OP_REGCOMP;
22c35a8c 2877 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2878 rcop->op_first = scalar(expr);
3280af22 2879 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2880 ? (OPf_SPECIAL | OPf_KIDS)
2881 : OPf_KIDS);
79072805 2882 rcop->op_private = 1;
11343788 2883 rcop->op_other = o;
79072805
LW		 2884
2885 /* establish postfix order */
3280af22 2886 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2887 LINKLIST(expr);
2888 rcop->op_next = expr;
2889 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2890 }
2891 else {
2892 rcop->op_next = LINKLIST(expr);
2893 expr->op_next = (OP*)rcop;
2894 }
79072805 2895
11343788 2896 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2897 }
2898
2899 if (repl) {
748a9306 2900 OP *curop;
0244c3a4 2901 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2902 curop = 0;
57843af0
GS		 2903 if (CopLINE(PL_curcop) < PL_multi_end)
2904 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2905 }
554b3eca 2906#ifdef USE_THREADS
2faa37cc 2907 else if (repl->op_type == OP_THREADSV
554b3eca 2908 && strchr("&`'123456789+",
533c011a 2909 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2910 {
2911 curop = 0;
2912 }
2913#endif /* USE_THREADS */
748a9306
LW		 2914 else if (repl->op_type == OP_CONST)
2915 curop = repl;
79072805 2916 else {
79072805
LW		 2917 OP *lastop = 0;
2918 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2919 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2920#ifdef USE_THREADS
ce862d02
IZ		 2921 if (curop->op_type == OP_THREADSV) {
2922 repl_has_vars = 1;
be949f6f 2923 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2924 break;
554b3eca
MB		 2925 }
2926#else
79072805 2927 if (curop->op_type == OP_GV) {
638eceb6 2928 GV *gv = cGVOPx_gv(curop);
ce862d02 2929 repl_has_vars = 1;
93a17b20 2930 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2931 break;
2932 }
554b3eca 2933#endif /* USE_THREADS */
79072805
LW		 2934 else if (curop->op_type == OP_RV2CV)
2935 break;
2936 else if (curop->op_type == OP_RV2SV ||
2937 curop->op_type == OP_RV2AV ||
2938 curop->op_type == OP_RV2HV ||
2939 curop->op_type == OP_RV2GV) {
2940 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2941 break;
2942 }
748a9306
LW		 2943 else if (curop->op_type == OP_PADSV ||
2944 curop->op_type == OP_PADAV ||
2945 curop->op_type == OP_PADHV ||
554b3eca 2946 curop->op_type == OP_PADANY) {
ce862d02 2947 repl_has_vars = 1;
748a9306 2948 }
1167e5da
SM		 2949 else if (curop->op_type == OP_PUSHRE)
2950 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2951 else
2952 break;
2953 }
2954 lastop = curop;
2955 }
748a9306 2956 }
ce862d02
IZ		 2957 if (curop == repl
2958 && !(repl_has_vars
2959 && (!pm->op_pmregexp
2960 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2961 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2962 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2963 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2964 }
2965 else {
ce862d02
IZ		 2966 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2967 pm->op_pmflags |= PMf_MAYBE_CONST;
2968 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2969 }
b7dc083c 2970 NewOp(1101, rcop, 1, LOGOP);
748a9306 2971 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2972 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2973 rcop->op_first = scalar(repl);
2974 rcop->op_flags |= OPf_KIDS;
2975 rcop->op_private = 1;
11343788 2976 rcop->op_other = o;
748a9306
LW		 2977
2978 /* establish postfix order */
2979 rcop->op_next = LINKLIST(repl);
2980 repl->op_next = (OP*)rcop;
2981
2982 pm->op_pmreplroot = scalar((OP*)rcop);
2983 pm->op_pmreplstart = LINKLIST(rcop);
2984 rcop->op_next = 0;
79072805
LW		 2985 }
2986 }
2987
2988 return (OP*)pm;
2989}
2990
2991OP *
864dbfa3 2992Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 2993{
2994 SVOP *svop;
b7dc083c 2995 NewOp(1101, svop, 1, SVOP);
79072805 2996 svop->op_type = type;
22c35a8c 2997 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2998 svop->op_sv = sv;
2999 svop->op_next = (OP*)svop;
3000 svop->op_flags = flags;
22c35a8c 3001 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3002 scalar((OP*)svop);
22c35a8c 3003 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3004 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3005 return CHECKOP(type, svop);
79072805
LW		 3006}
3007
3008OP *
350de78d
GS		 3009Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3010{
3011 PADOP *padop;
3012 NewOp(1101, padop, 1, PADOP);
3013 padop->op_type = type;
3014 padop->op_ppaddr = PL_ppaddr[type];
3015 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3016 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3017 PL_curpad[padop->op_padix] = sv;
7766f137 3018 SvPADTMP_on(sv);
350de78d
GS		 3019 padop->op_next = (OP*)padop;
3020 padop->op_flags = flags;
3021 if (PL_opargs[type] & OA_RETSCALAR)
3022 scalar((OP*)padop);
3023 if (PL_opargs[type] & OA_TARGET)
3024 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3025 return CHECKOP(type, padop);
3026}
3027
3028OP *
864dbfa3 3029Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3030{
11343788 3031 dTHR;
350de78d 3032#ifdef USE_ITHREADS
743e66e6 3033 GvIN_PAD_on(gv);
350de78d
GS		 3034 return newPADOP(type, flags, SvREFCNT_inc(gv));
3035#else
7934575e 3036 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3037#endif
79072805
LW		 3038}
3039
3040OP *
864dbfa3 3041Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3042{
3043 PVOP *pvop;
b7dc083c 3044 NewOp(1101, pvop, 1, PVOP);
79072805 3045 pvop->op_type = type;
22c35a8c 3046 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3047 pvop->op_pv = pv;
3048 pvop->op_next = (OP*)pvop;
3049 pvop->op_flags = flags;
22c35a8c 3050 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3051 scalar((OP*)pvop);
22c35a8c 3052 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3053 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3054 return CHECKOP(type, pvop);
79072805
LW		 3055}
3056
79072805 3057void
864dbfa3 3058Perl_package(pTHX_ OP *o)
79072805 3059{
11343788 3060 dTHR;
93a17b20 3061 SV *sv;
79072805 3062
3280af22
NIS		 3063 save_hptr(&PL_curstash);
3064 save_item(PL_curstname);
11343788 3065 if (o) {
463ee0b2
LW		 3066 STRLEN len;
3067 char *name;
11343788 3068 sv = cSVOPo->op_sv;
463ee0b2 3069 name = SvPV(sv, len);
3280af22
NIS		 3070 PL_curstash = gv_stashpvn(name,len,TRUE);
3071 sv_setpvn(PL_curstname, name, len);
11343788 3072 op_free(o);
93a17b20
LW		 3073 }
3074 else {
3280af22
NIS		 3075 sv_setpv(PL_curstname,"<none>");
3076 PL_curstash = Nullhv;
93a17b20 3077 }
7ad382f4 3078 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3079 PL_copline = NOLINE;
3080 PL_expect = XSTATE;
79072805
LW		 3081}
3082
85e6fe83 3083void
864dbfa3 3084Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3085{
a0d0e21e 3086 OP *pack;
a0d0e21e
LW		 3087 OP *rqop;
3088 OP *imop;
b1cb66bf 3089 OP *veop;
78ca652e 3090 GV *gv;
85e6fe83 3091
a0d0e21e 3092 if (id->op_type != OP_CONST)
cea2e8a9 3093 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3094
b1cb66bf 3095 veop = Nullop;
3096
0f79a09d 3097 if (version != Nullop) {
b1cb66bf 3098 SV *vesv = ((SVOP*)version)->op_sv;
3099
44dcb63b 3100 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3101 arg = version;
3102 }
3103 else {
3104 OP *pack;
0f79a09d 3105 SV *meth;
b1cb66bf 3106
44dcb63b 3107 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3108 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3109
3110 /* Make copy of id so we don't free it twice */
3111 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3112
3113 /* Fake up a method call to VERSION */
0f79a09d
GS		 3114 meth = newSVpvn("VERSION",7);
3115 sv_upgrade(meth, SVt_PVIV);
155aba94 3116 (void)SvIOK_on(meth);
0f79a09d 3117 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3118 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3119 append_elem(OP_LIST,
0f79a09d
GS		 3120 prepend_elem(OP_LIST, pack, list(version)),
3121 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3122 }
3123 }
aeea060c 3124
a0d0e21e 3125 /* Fake up an import/unimport */
4633a7c4
LW		 3126 if (arg && arg->op_type == OP_STUB)
3127 imop = arg; /* no import on explicit () */
44dcb63b 3128 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3129 imop = Nullop; /* use 5.0; */
3130 }
4633a7c4 3131 else {
0f79a09d
GS		 3132 SV *meth;
3133
4633a7c4
LW		 3134 /* Make copy of id so we don't free it twice */
3135 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3136
3137 /* Fake up a method call to import/unimport */
3138 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3139 sv_upgrade(meth, SVt_PVIV);
155aba94 3140 (void)SvIOK_on(meth);
0f79a09d 3141 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3142 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3143 append_elem(OP_LIST,
3144 prepend_elem(OP_LIST, pack, list(arg)),
3145 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3146 }
3147
78ca652e
GS		 3148 /* Fake up a require, handle override, if any */
3149 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3150 if (!(gv && GvIMPORTED_CV(gv)))
3151 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3152
3153 if (gv && GvIMPORTED_CV(gv)) {
3154 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3155 append_elem(OP_LIST, id,
3156 scalar(newUNOP(OP_RV2CV, 0,
3157 newGVOP(OP_GV, 0,
3158 gv))))));
3159 }
3160 else {
3161 rqop = newUNOP(OP_REQUIRE, 0, id);
3162 }
a0d0e21e
LW		 3163
3164 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3165 newATTRSUB(floor,
79cb57f6 3166 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3167 Nullop,
09bef843 3168 Nullop,
a0d0e21e 3169 append_elem(OP_LINESEQ,
b1cb66bf 3170 append_elem(OP_LINESEQ,
3171 newSTATEOP(0, Nullch, rqop),
3172 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3173 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3174
c305c6a0 3175 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3176 PL_copline = NOLINE;
3177 PL_expect = XSTATE;
85e6fe83
LW		 3178}
3179
e4783991
GS		 3180void
3181Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3182{
3183 va_list args;
3184 va_start(args, ver);
3185 vload_module(flags, name, ver, &args);
3186 va_end(args);
3187}
3188
3189#ifdef PERL_IMPLICIT_CONTEXT
3190void
3191Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3192{
3193 dTHX;
3194 va_list args;
3195 va_start(args, ver);
3196 vload_module(flags, name, ver, &args);
3197 va_end(args);
3198}
3199#endif
3200
3201void
3202Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3203{
3204 OP *modname, *veop, *imop;
3205
3206 modname = newSVOP(OP_CONST, 0, name);
3207 modname->op_private |= OPpCONST_BARE;
3208 if (ver) {
3209 veop = newSVOP(OP_CONST, 0, ver);
3210 }
3211 else
3212 veop = Nullop;
3213 if (flags & PERL_LOADMOD_NOIMPORT) {
3214 imop = sawparens(newNULLLIST());
3215 }
3216 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3217 imop = va_arg(*args, OP*);
3218 }
3219 else {
3220 SV *sv;
3221 imop = Nullop;
3222 sv = va_arg(*args, SV*);
3223 while (sv) {
3224 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3225 sv = va_arg(*args, SV*);
3226 }
3227 }
81885997
GS		 3228 {
3229 line_t ocopline = PL_copline;
3230 int oexpect = PL_expect;
3231
3232 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3233 veop, modname, imop);
3234 PL_expect = oexpect;
3235 PL_copline = ocopline;
3236 }
e4783991
GS		 3237}
3238
79072805 3239OP *
864dbfa3 3240Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3241{
3242 OP *doop;
3243 GV *gv;
3244
3245 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3246 if (!(gv && GvIMPORTED_CV(gv)))
3247 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3248
3249 if (gv && GvIMPORTED_CV(gv)) {
3250 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3251 append_elem(OP_LIST, term,
3252 scalar(newUNOP(OP_RV2CV, 0,
3253 newGVOP(OP_GV, 0,
3254 gv))))));
3255 }
3256 else {
3257 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3258 }
3259 return doop;
3260}
3261
3262OP *
864dbfa3 3263Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3264{
3265 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3266 list(force_list(subscript)),
3267 list(force_list(listval)) );
79072805
LW		 3268}
3269
76e3520e 3270STATIC I32
cea2e8a9 3271S_list_assignment(pTHX_ register OP *o)
79072805 3272{
11343788 3273 if (!o)
79072805
LW		 3274 return TRUE;
3275
11343788
MB		 3276 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3277 o = cUNOPo->op_first;
79072805 3278
11343788 3279 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3280 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3281 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3282
3283 if (t && f)
3284 return TRUE;
3285 if (t || f)
3286 yyerror("Assignment to both a list and a scalar");
3287 return FALSE;
3288 }
3289
11343788
MB		 3290 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3291 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3292 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3293 return TRUE;
3294
11343788 3295 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3296 return TRUE;
3297
11343788 3298 if (o->op_type == OP_RV2SV)
79072805
LW		 3299 return FALSE;
3300
3301 return FALSE;
3302}
3303
3304OP *
864dbfa3 3305Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3306{
11343788 3307 OP *o;
79072805 3308
a0d0e21e
LW		 3309 if (optype) {
3310 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3311 return newLOGOP(optype, 0,
3312 mod(scalar(left), optype),
3313 newUNOP(OP_SASSIGN, 0, scalar(right)));
3314 }
3315 else {
3316 return newBINOP(optype, OPf_STACKED,
3317 mod(scalar(left), optype), scalar(right));
3318 }
3319 }
3320
79072805 3321 if (list_assignment(left)) {
6ee623d5 3322 dTHR;
10c8fecd
GS		 3323 OP *curop;
3324
3280af22
NIS		 3325 PL_modcount = 0;
3326 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3327 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3328 if (PL_eval_start)
3329 PL_eval_start = 0;
748a9306 3330 else {
a0d0e21e
LW		 3331 op_free(left);
3332 op_free(right);
3333 return Nullop;
3334 }
10c8fecd
GS		 3335 curop = list(force_list(left));
3336 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3337 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3338 for (curop = ((LISTOP*)curop)->op_first;
3339 curop; curop = curop->op_sibling)
3340 {
3341 if (curop->op_type == OP_RV2HV &&
3342 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3343 o->op_private |= OPpASSIGN_HASH;
3344 break;
3345 }
3346 }
a0d0e21e 3347 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3348 OP *lastop = o;
3280af22 3349 PL_generation++;
11343788 3350 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3351 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3352 if (curop->op_type == OP_GV) {
638eceb6 3353 GV *gv = cGVOPx_gv(curop);
3280af22 3354 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3355 break;
3280af22 3356 SvCUR(gv) = PL_generation;
79072805 3357 }
748a9306
LW		 3358 else if (curop->op_type == OP_PADSV ||
3359 curop->op_type == OP_PADAV ||
3360 curop->op_type == OP_PADHV ||
3361 curop->op_type == OP_PADANY) {
3280af22 3362 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3363 SV *sv = svp[curop->op_targ];
3280af22 3364 if (SvCUR(sv) == PL_generation)
748a9306 3365 break;
3280af22 3366 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3367 }
79072805
LW		 3368 else if (curop->op_type == OP_RV2CV)
3369 break;
3370 else if (curop->op_type == OP_RV2SV ||
3371 curop->op_type == OP_RV2AV ||
3372 curop->op_type == OP_RV2HV ||
3373 curop->op_type == OP_RV2GV) {
3374 if (lastop->op_type != OP_GV) /* funny deref? */
3375 break;
3376 }
1167e5da
SM		 3377 else if (curop->op_type == OP_PUSHRE) {
3378 if (((PMOP*)curop)->op_pmreplroot) {
3379 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 3380 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3381 break;
3280af22 3382 SvCUR(gv) = PL_generation;
1167e5da
SM		 3383 }
3384 }
79072805
LW		 3385 else
3386 break;
3387 }
3388 lastop = curop;
3389 }
11343788 3390 if (curop != o)
10c8fecd 3391 o->op_private |= OPpASSIGN_COMMON;
79072805 3392 }
c07a80fd 3393 if (right && right->op_type == OP_SPLIT) {
3394 OP* tmpop;
3395 if ((tmpop = ((LISTOP*)right)->op_first) &&
3396 tmpop->op_type == OP_PUSHRE)
3397 {
3398 PMOP *pm = (PMOP*)tmpop;
3399 if (left->op_type == OP_RV2AV &&
3400 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3401 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3402 {
3403 tmpop = ((UNOP*)left)->op_first;
3404 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3405#ifdef USE_ITHREADS
3406 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3407 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3408#else
3409 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3410 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3411#endif
c07a80fd 3412 pm->op_pmflags |= PMf_ONCE;
11343788 3413 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3414 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3415 tmpop->op_sibling = Nullop; /* don't free split */
3416 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3417 op_free(o); /* blow off assign */
54310121 3418 right->op_flags &= ~OPf_WANT;
a5f75d66 3419 /* "I don't know and I don't care." */
c07a80fd 3420 return right;
3421 }
3422 }
3423 else {
3280af22 3424 if (PL_modcount < 10000 &&
c07a80fd 3425 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3426 {
3427 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3428 if (SvIVX(sv) == 0)
3280af22 3429 sv_setiv(sv, PL_modcount+1);
c07a80fd 3430 }
3431 }
3432 }
3433 }
11343788 3434 return o;
79072805
LW		 3435 }
3436 if (!right)
3437 right = newOP(OP_UNDEF, 0);
3438 if (right->op_type == OP_READLINE) {
3439 right->op_flags |= OPf_STACKED;
463ee0b2 3440 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3441 }
a0d0e21e 3442 else {
3280af22 3443 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3444 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3445 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3446 if (PL_eval_start)
3447 PL_eval_start = 0;
748a9306 3448 else {
11343788 3449 op_free(o);
a0d0e21e
LW		 3450 return Nullop;
3451 }
3452 }
11343788 3453 return o;
79072805
LW		 3454}
3455
3456OP *
864dbfa3 3457Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3458{
11343788 3459 dTHR;
bbce6d69 3460 U32 seq = intro_my();
79072805
LW		 3461 register COP *cop;
3462
b7dc083c 3463 NewOp(1101, cop, 1, COP);
57843af0 3464 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3465 cop->op_type = OP_DBSTATE;
22c35a8c 3466 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3467 }
3468 else {
3469 cop->op_type = OP_NEXTSTATE;
22c35a8c 3470 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3471 }
79072805 3472 cop->op_flags = flags;
393fec97 3473 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3474#ifdef NATIVE_HINTS
3475 cop->op_private |= NATIVE_HINTS;
3476#endif
e24b16f9 3477 PL_compiling.op_private = cop->op_private;
79072805
LW		 3478 cop->op_next = (OP*)cop;
3479
463ee0b2
LW		 3480 if (label) {
3481 cop->cop_label = label;
3280af22 3482 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3483 }
bbce6d69 3484 cop->cop_seq = seq;
3280af22 3485 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3486 if (specialWARN(PL_curcop->cop_warnings))
599cee73
PM		 3487 cop->cop_warnings = PL_curcop->cop_warnings ;
3488 else
3489 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3490
79072805 3491
3280af22 3492 if (PL_copline == NOLINE)
57843af0 3493 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3494 else {
57843af0 3495 CopLINE_set(cop, PL_copline);
3280af22 3496 PL_copline = NOLINE;
79072805 3497 }
57843af0
GS		 3498#ifdef USE_ITHREADS
3499 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXXXX share in a pvtable? */
3500#else
cc49e20b 3501 CopFILEGV_set(cop, (GV*)SvREFCNT_inc(CopFILEGV(PL_curcop)));
57843af0 3502#endif
11faa288 3503 CopSTASH_set(cop, PL_curstash);
79072805 3504
3280af22 3505 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3506 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3507 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3508 (void)SvIOK_on(*svp);
57b2e452 3509 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3510 }
3511 }
3512
11343788 3513 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3514}
3515
bbce6d69 3516/* "Introduce" my variables to visible status. */
3517U32
864dbfa3 3518Perl_intro_my(pTHX)
bbce6d69 3519{
3520 SV **svp;
3521 SV *sv;
3522 I32 i;
3523
3280af22
NIS		 3524 if (! PL_min_intro_pending)
3525 return PL_cop_seqmax;
bbce6d69 3526
3280af22
NIS		 3527 svp = AvARRAY(PL_comppad_name);
3528 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3529 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3530 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3531 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3532 }
3533 }
3280af22
NIS		 3534 PL_min_intro_pending = 0;
3535 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3536 return PL_cop_seqmax++;
bbce6d69 3537}
3538
79072805 3539OP *
864dbfa3 3540Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3541{
883ffac3
CS		 3542 return new_logop(type, flags, &first, &other);
3543}
3544
3bd495df 3545STATIC OP *
cea2e8a9 3546S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3547{
11343788 3548 dTHR;
79072805 3549 LOGOP *logop;
11343788 3550 OP *o;
883ffac3
CS		 3551 OP *first = *firstp;
3552 OP *other = *otherp;
79072805 3553
a0d0e21e
LW		 3554 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3555 return newBINOP(type, flags, scalar(first), scalar(other));
3556
8990e307 3557 scalarboolean(first);
79072805
LW		 3558 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3559 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3560 if (type == OP_AND || type == OP_OR) {
3561 if (type == OP_AND)
3562 type = OP_OR;
3563 else
3564 type = OP_AND;
11343788 3565 o = first;
883ffac3 3566 first = *firstp = cUNOPo->op_first;
11343788
MB		 3567 if (o->op_next)
3568 first->op_next = o->op_next;
3569 cUNOPo->op_first = Nullop;
3570 op_free(o);
79072805
LW		 3571 }
3572 }
3573 if (first->op_type == OP_CONST) {
4673fc70 3574 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
e476b1b5 3575 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3576 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3577 op_free(first);
883ffac3 3578 *firstp = Nullop;
79072805
LW		 3579 return other;
3580 }
3581 else {
3582 op_free(other);
883ffac3 3583 *otherp = Nullop;
79072805
LW		 3584 return first;
3585 }
3586 }
3587 else if (first->op_type == OP_WANTARRAY) {
3588 if (type == OP_AND)
3589 list(other);
3590 else
3591 scalar(other);
3592 }
e476b1b5 3593 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3594 OP *k1 = ((UNOP*)first)->op_first;
3595 OP *k2 = k1->op_sibling;
3596 OPCODE warnop = 0;
3597 switch (first->op_type)
3598 {
3599 case OP_NULL:
3600 if (k2 && k2->op_type == OP_READLINE
3601 && (k2->op_flags & OPf_STACKED)
55d729e4 3602 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3603 {
a6006777 3604 warnop = k2->op_type;
72b16652 3605 }
a6006777 3606 break;
3607
3608 case OP_SASSIGN:
68dc0745 3609 if (k1->op_type == OP_READDIR
3610 || k1->op_type == OP_GLOB
72b16652 3611 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3612 || k1->op_type == OP_EACH)
72b16652
GS		 3613 {
3614 warnop = ((k1->op_type == OP_NULL)
3615 ? k1->op_targ : k1->op_type);
3616 }
a6006777 3617 break;
3618 }
8ebc5c01 3619 if (warnop) {
57843af0
GS		 3620 line_t oldline = CopLINE(PL_curcop);
3621 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3622 Perl_warner(aTHX_ WARN_MISC,
599cee73 3623 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3624 PL_op_desc[warnop],
68dc0745 3625 ((warnop == OP_READLINE || warnop == OP_GLOB)
3626 ? " construct" : "() operator"));
57843af0 3627 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3628 }
a6006777 3629 }
79072805
LW		 3630
3631 if (!other)
3632 return first;
3633
a0d0e21e
LW		 3634 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3635 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3636
b7dc083c 3637 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3638
3639 logop->op_type = type;
22c35a8c 3640 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3641 logop->op_first = first;
3642 logop->op_flags = flags | OPf_KIDS;
3643 logop->op_other = LINKLIST(other);
c07a80fd 3644 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3645
3646 /* establish postfix order */
3647 logop->op_next = LINKLIST(first);
3648 first->op_next = (OP*)logop;
3649 first->op_sibling = other;
3650
11343788
MB		 3651 o = newUNOP(OP_NULL, 0, (OP*)logop);
3652 other->op_next = o;
79072805 3653
11343788 3654 return o;
79072805
LW		 3655}
3656
3657OP *
864dbfa3 3658Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3659{
11343788 3660 dTHR;
1a67a97c
SM		 3661 LOGOP *logop;
3662 OP *start;
11343788 3663 OP *o;
79072805 3664
b1cb66bf 3665 if (!falseop)
3666 return newLOGOP(OP_AND, 0, first, trueop);
3667 if (!trueop)
3668 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3669
8990e307 3670 scalarboolean(first);
79072805
LW		 3671 if (first->op_type == OP_CONST) {
3672 if (SvTRUE(((SVOP*)first)->op_sv)) {
3673 op_free(first);
b1cb66bf 3674 op_free(falseop);
3675 return trueop;
79072805
LW		 3676 }
3677 else {
3678 op_free(first);
b1cb66bf 3679 op_free(trueop);
3680 return falseop;
79072805
LW		 3681 }
3682 }
3683 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3684 list(trueop);
3685 scalar(falseop);
79072805 3686 }
1a67a97c
SM		 3687 NewOp(1101, logop, 1, LOGOP);
3688 logop->op_type = OP_COND_EXPR;
3689 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3690 logop->op_first = first;
3691 logop->op_flags = flags | OPf_KIDS;
3692 logop->op_private = 1 | (flags >> 8);
3693 logop->op_other = LINKLIST(trueop);
3694 logop->op_next = LINKLIST(falseop);
79072805 3695
79072805
LW		 3696
3697 /* establish postfix order */
1a67a97c
SM		 3698 start = LINKLIST(first);
3699 first->op_next = (OP*)logop;
79072805 3700
b1cb66bf 3701 first->op_sibling = trueop;
3702 trueop->op_sibling = falseop;
1a67a97c 3703 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3704
1a67a97c 3705 trueop->op_next = falseop->op_next = o;
79072805 3706
1a67a97c 3707 o->op_next = start;
11343788 3708 return o;
79072805
LW		 3709}
3710
3711OP *
864dbfa3 3712Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3713{
b35b2403 3714 dTHR;
1a67a97c 3715 LOGOP *range;
79072805
LW		 3716 OP *flip;
3717 OP *flop;
1a67a97c 3718 OP *leftstart;
11343788 3719 OP *o;
79072805 3720
1a67a97c 3721 NewOp(1101, range, 1, LOGOP);
79072805 3722
1a67a97c
SM		 3723 range->op_type = OP_RANGE;
3724 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3725 range->op_first = left;
3726 range->op_flags = OPf_KIDS;
3727 leftstart = LINKLIST(left);
3728 range->op_other = LINKLIST(right);
3729 range->op_private = 1 | (flags >> 8);
79072805
LW		 3730
3731 left->op_sibling = right;
3732
1a67a97c
SM		 3733 range->op_next = (OP*)range;
3734 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3735 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3736 o = newUNOP(OP_NULL, 0, flop);
79072805 3737 linklist(flop);
1a67a97c 3738 range->op_next = leftstart;
79072805
LW		 3739
3740 left->op_next = flip;
3741 right->op_next = flop;
3742
1a67a97c
SM		 3743 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3744 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3745 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3746 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3747
3748 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3749 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3750
11343788 3751 flip->op_next = o;
79072805 3752 if (!flip->op_private || !flop->op_private)
11343788 3753 linklist(o); /* blow off optimizer unless constant */
79072805 3754
11343788 3755 return o;
79072805
LW		 3756}
3757
3758OP *
864dbfa3 3759Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3760{
11343788 3761 dTHR;
463ee0b2 3762 OP* listop;
11343788 3763 OP* o;
463ee0b2 3764 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3765 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3766
463ee0b2
LW		 3767 if (expr) {
3768 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3769 return block; /* do {} while 0 does once */
fb73857a 3770 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3771 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3772 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3773 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3774 } else if (expr->op_flags & OPf_KIDS) {
3775 OP *k1 = ((UNOP*)expr)->op_first;
3776 OP *k2 = (k1) ? k1->op_sibling : NULL;
3777 switch (expr->op_type) {
3778 case OP_NULL:
3779 if (k2 && k2->op_type == OP_READLINE
3780 && (k2->op_flags & OPf_STACKED)
3781 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3782 expr = newUNOP(OP_DEFINED, 0, expr);
3783 break;
3784
3785 case OP_SASSIGN:
3786 if (k1->op_type == OP_READDIR
3787 || k1->op_type == OP_GLOB
72b16652 3788 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3789 || k1->op_type == OP_EACH)
3790 expr = newUNOP(OP_DEFINED, 0, expr);
3791 break;
3792 }
774d564b 3793 }
463ee0b2 3794 }
93a17b20 3795
8990e307 3796 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3797 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3798
883ffac3
CS		 3799 if (listop)
3800 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3801
11343788
MB		 3802 if (once && o != listop)
3803 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3804
11343788
MB		 3805 if (o == listop)
3806 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3807
11343788
MB		 3808 o->op_flags |= flags;
3809 o = scope(o);
3810 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3811 return o;
79072805
LW		 3812}
3813
3814OP *
864dbfa3 3815Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3816{
11343788 3817 dTHR;
79072805
LW		 3818 OP *redo;
3819 OP *next = 0;
3820 OP *listop;
11343788 3821 OP *o;
79072805 3822 OP *condop;
1ba6ee2b 3823 U8 loopflags = 0;
79072805 3824
fb73857a 3825 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3826 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3827 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3828 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3829 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3830 OP *k1 = ((UNOP*)expr)->op_first;
3831 OP *k2 = (k1) ? k1->op_sibling : NULL;
3832 switch (expr->op_type) {
3833 case OP_NULL:
3834 if (k2 && k2->op_type == OP_READLINE
3835 && (k2->op_flags & OPf_STACKED)
3836 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3837 expr = newUNOP(OP_DEFINED, 0, expr);
3838 break;
3839
3840 case OP_SASSIGN:
3841 if (k1->op_type == OP_READDIR
3842 || k1->op_type == OP_GLOB
72b16652 3843 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3844 || k1->op_type == OP_EACH)
3845 expr = newUNOP(OP_DEFINED, 0, expr);
3846 break;
3847 }
748a9306 3848 }
79072805
LW		 3849
3850 if (!block)
3851 block = newOP(OP_NULL, 0);
87246558
GS		 3852 else if (cont) {
3853 block = scope(block);
3854 }
79072805 3855
1ba6ee2b 3856 if (cont) {
79072805 3857 next = LINKLIST(cont);
1ba6ee2b
GS		 3858 loopflags |= OPpLOOP_CONTINUE;
3859 }
fb73857a 3860 if (expr) {
85538317
GS		 3861 OP *unstack = newOP(OP_UNSTACK, 0);
3862 if (!next)
3863 next = unstack;
3864 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3865 if ((line_t)whileline != NOLINE) {
3280af22 3866 PL_copline = whileline;
fb73857a 3867 cont = append_elem(OP_LINESEQ, cont,
3868 newSTATEOP(0, Nullch, Nullop));
3869 }
3870 }
79072805 3871
463ee0b2 3872 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3873 redo = LINKLIST(listop);
3874
3875 if (expr) {
3280af22 3876 PL_copline = whileline;
883ffac3
CS		 3877 scalar(listop);
3878 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3879 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3880 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3881 op_free((OP*)loop);
883ffac3 3882 return Nullop; /* listop already freed by new_logop */
463ee0b2 3883 }
883ffac3
CS		 3884 if (listop)
3885 ((LISTOP*)listop)->op_last->op_next = condop =
3886 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3887 }
3888 else
11343788 3889 o = listop;
79072805
LW		 3890
3891 if (!loop) {
b7dc083c 3892 NewOp(1101,loop,1,LOOP);
79072805 3893 loop->op_type = OP_ENTERLOOP;
22c35a8c 3894 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3895 loop->op_private = 0;
3896 loop->op_next = (OP*)loop;
3897 }
3898
11343788 3899 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3900
3901 loop->op_redoop = redo;
11343788 3902 loop->op_lastop = o;
1ba6ee2b 3903 o->op_private |= loopflags;
79072805
LW		 3904
3905 if (next)
3906 loop->op_nextop = next;
3907 else
11343788 3908 loop->op_nextop = o;
79072805 3909
11343788
MB		 3910 o->op_flags |= flags;
3911 o->op_private |= (flags >> 8);
3912 return o;
79072805
LW		 3913}
3914
3915OP *
864dbfa3 3916Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3917{
3918 LOOP *loop;
fb73857a 3919 OP *wop;
85e6fe83 3920 int padoff = 0;
4633a7c4 3921 I32 iterflags = 0;
79072805 3922
79072805 3923 if (sv) {
85e6fe83 3924 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3925 sv->op_type = OP_RV2GV;
22c35a8c 3926 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3927 }
85e6fe83
LW		 3928 else if (sv->op_type == OP_PADSV) { /* private variable */
3929 padoff = sv->op_targ;
743e66e6 3930 sv->op_targ = 0;
85e6fe83
LW		 3931 op_free(sv);
3932 sv = Nullop;
3933 }
54b9620d
MB		 3934 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3935 padoff = sv->op_targ;
743e66e6 3936 sv->op_targ = 0;
54b9620d
MB		 3937 iterflags |= OPf_SPECIAL;
3938 op_free(sv);
3939 sv = Nullop;
3940 }
79072805 3941 else
cea2e8a9 3942 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3943 }
3944 else {
54b9620d
MB		 3945#ifdef USE_THREADS
3946 padoff = find_threadsv("_");
3947 iterflags |= OPf_SPECIAL;
3948#else
3280af22 3949 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3950#endif
79072805 3951 }
5f05dabc 3952 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3953 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3954 iterflags |= OPf_STACKED;
3955 }
89ea2908
GA		 3956 else if (expr->op_type == OP_NULL &&
3957 (expr->op_flags & OPf_KIDS) &&
3958 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3959 {
3960 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3961 * set the STACKED flag to indicate that these values are to be
3962 * treated as min/max values by 'pp_iterinit'.
3963 */
3964 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 3965 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 3966 OP* left = range->op_first;
3967 OP* right = left->op_sibling;
5152d7c7 3968 LISTOP* listop;
89ea2908
GA		 3969
3970 range->op_flags &= ~OPf_KIDS;
3971 range->op_first = Nullop;
3972
5152d7c7 3973 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 3974 listop->op_first->op_next = range->op_next;
3975 left->op_next = range->op_other;
5152d7c7
GS		 3976 right->op_next = (OP*)listop;
3977 listop->op_next = listop->op_first;
89ea2908
GA		 3978
3979 op_free(expr);
5152d7c7 3980 expr = (OP*)(listop);
89ea2908
GA		 3981 null(expr);
3982 iterflags |= OPf_STACKED;
3983 }
3984 else {
3985 expr = mod(force_list(expr), OP_GREPSTART);
3986 }
3987
3988
4633a7c4 3989 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3990 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 3991 assert(!loop->op_next);
b7dc083c 3992#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 3993 {
3994 LOOP *tmp;
3995 NewOp(1234,tmp,1,LOOP);
3996 Copy(loop,tmp,1,LOOP);
3997 loop = tmp;
3998 }
b7dc083c 3999#else
85e6fe83 4000 Renew(loop, 1, LOOP);
b7dc083c 4001#endif
85e6fe83 4002 loop->op_targ = padoff;
fb73857a 4003 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4004 PL_copline = forline;
fb73857a 4005 return newSTATEOP(0, label, wop);
79072805
LW		 4006}
4007
8990e307 4008OP*
864dbfa3 4009Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4010{
11343788
MB		 4011 dTHR;
4012 OP *o;
2d8e6c8d
GS		 4013 STRLEN n_a;
4014
8990e307 4015 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4016 /* "last()" means "last" */
4017 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4018 o = newOP(type, OPf_SPECIAL);
4019 else {
4020 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4021 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4022 : ""));
4023 }
8990e307
LW		 4024 op_free(label);
4025 }
4026 else {
a0d0e21e
LW		 4027 if (label->op_type == OP_ENTERSUB)
4028 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4029 o = newUNOP(type, OPf_STACKED, label);
8990e307 4030 }
3280af22 4031 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4032 return o;
8990e307
LW		 4033}
4034
79072805 4035void
864dbfa3 4036Perl_cv_undef(pTHX_ CV *cv)
79072805 4037{
11343788
MB		 4038 dTHR;
4039#ifdef USE_THREADS
e858de61
MB		 4040 if (CvMUTEXP(cv)) {
4041 MUTEX_DESTROY(CvMUTEXP(cv));
4042 Safefree(CvMUTEXP(cv));
4043 CvMUTEXP(cv) = 0;
4044 }
11343788
MB		 4045#endif /* USE_THREADS */
4046
a0d0e21e 4047 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4048#ifdef USE_THREADS
4049 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4050 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4051#else
a0d0e21e 4052 if (CvDEPTH(cv))
cea2e8a9 4053 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4054#endif /* USE_THREADS */
8990e307 4055 ENTER;
a0d0e21e 4056
7766f137 4057 SAVEVPTR(PL_curpad);
3280af22 4058 PL_curpad = 0;
a0d0e21e 4059
a5f75d66 4060 if (!CvCLONED(cv))
748a9306 4061 op_free(CvROOT(cv));
79072805 4062 CvROOT(cv) = Nullop;
8990e307 4063 LEAVE;
79072805 4064 }
1d5db326 4065 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4066 CvFLAGS(cv) = 0;
8e07c86e
AD		 4067 SvREFCNT_dec(CvGV(cv));
4068 CvGV(cv) = Nullgv;
4069 SvREFCNT_dec(CvOUTSIDE(cv));
4070 CvOUTSIDE(cv) = Nullcv;
4071 if (CvPADLIST(cv)) {
8ebc5c01 4072 /* may be during global destruction */
4073 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4074 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4075 while (i >= 0) {
4076 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4077 SV* sv = svp ? *svp : Nullsv;
4078 if (!sv)
4079 continue;
3280af22
NIS		 4080 if (sv == (SV*)PL_comppad_name)
4081 PL_comppad_name = Nullav;
4082 else if (sv == (SV*)PL_comppad) {
4083 PL_comppad = Nullav;
4084 PL_curpad = Null(SV**);
46fc3d4c 4085 }
4086 SvREFCNT_dec(sv);
8ebc5c01 4087 }
4088 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4089 }
8e07c86e
AD		 4090 CvPADLIST(cv) = Nullav;
4091 }
79072805
LW		 4092}
4093
76e3520e 4094STATIC void
743e66e6 4095S_cv_dump(pTHX_ CV *cv)
5f05dabc 4096{
62fde642 4097#ifdef DEBUGGING
5f05dabc 4098 CV *outside = CvOUTSIDE(cv);
4099 AV* padlist = CvPADLIST(cv);
4fdae800 4100 AV* pad_name;
4101 AV* pad;
4102 SV** pname;
4103 SV** ppad;
5f05dabc 4104 I32 ix;
4105
b900a521
JH		 4106 PerlIO_printf(Perl_debug_log,
4107 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4108 PTR2UV(cv),
ab50184a 4109 (CvANON(cv) ? "ANON"
6b88bc9c 4110 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4111 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4112 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4113 PTR2UV(outside),
ab50184a
CS		 4114 (!outside ? "null"
4115 : CvANON(outside) ? "ANON"
6b88bc9c 4116 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4117 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4118 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4119
4fdae800 4120 if (!padlist)
4121 return;
4122
4123 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4124 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4125 pname = AvARRAY(pad_name);
4126 ppad = AvARRAY(pad);
4127
93965878 4128 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4129 if (SvPOK(pname[ix]))
b900a521
JH		 4130 PerlIO_printf(Perl_debug_log,
4131 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4132 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4133 SvFAKE(pname[ix]) ? "FAKE " : "",
4134 SvPVX(pname[ix]),
b900a521
JH		 4135 (IV)I_32(SvNVX(pname[ix])),
4136 SvIVX(pname[ix]));
5f05dabc 4137 }
743e66e6 4138#endif /* DEBUGGING */
62fde642 4139}
5f05dabc 4140
76e3520e 4141STATIC CV *
cea2e8a9 4142S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4143{
11343788 4144 dTHR;
748a9306
LW		 4145 AV* av;
4146 I32 ix;
4147 AV* protopadlist = CvPADLIST(proto);
4148 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4149 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4150 SV** pname = AvARRAY(protopad_name);
4151 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4152 I32 fname = AvFILLp(protopad_name);
4153 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4154 AV* comppadlist;
4155 CV* cv;
4156
07055b4c
CS		 4157 assert(!CvUNIQUE(proto));
4158
748a9306 4159 ENTER;
354992b1 4160 SAVECOMPPAD();
3280af22
NIS		 4161 SAVESPTR(PL_comppad_name);
4162 SAVESPTR(PL_compcv);
748a9306 4163
3280af22 4164 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4165 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4166 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4167 CvCLONED_on(cv);
748a9306 4168
11343788 4169#ifdef USE_THREADS
12ca11f6 4170 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4171 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4172 CvOWNER(cv) = 0;
4173#endif /* USE_THREADS */
57843af0 4174 CvFILE(cv) = CvFILE(proto);
44a8e56a 4175 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4176 CvSTASH(cv) = CvSTASH(proto);
4177 CvROOT(cv) = CvROOT(proto);
4178 CvSTART(cv) = CvSTART(proto);
5f05dabc 4179 if (outside)
4180 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4181
68dc0745 4182 if (SvPOK(proto))
4183 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4184
3280af22 4185 PL_comppad_name = newAV();
46fc3d4c 4186 for (ix = fname; ix >= 0; ix--)
3280af22 4187 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4188
3280af22 4189 PL_comppad = newAV();
748a9306
LW		 4190
4191 comppadlist = newAV();
4192 AvREAL_off(comppadlist);
3280af22
NIS		 4193 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4194 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4195 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4196 av_fill(PL_comppad, AvFILLp(protopad));
4197 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4198
4199 av = newAV(); /* will be @_ */
4200 av_extend(av, 0);
3280af22 4201 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4202 AvFLAGS(av) = AVf_REIFY;
4203
9607fc9c 4204 for (ix = fpad; ix > 0; ix--) {
4205 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4206 if (namesv && namesv != &PL_sv_undef) {
aa689395 4207 char *name = SvPVX(namesv); /* XXX */
4208 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4209 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4210 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4211 if (!off)
3280af22 4212 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4213 else if (off != ix)
cea2e8a9 4214 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4215 }
4216 else { /* our own lexical */
aa689395 4217 SV* sv;
5f05dabc 4218 if (*name == '&') {
4219 /* anon code -- we'll come back for it */
4220 sv = SvREFCNT_inc(ppad[ix]);
4221 }
4222 else if (*name == '@')
4223 sv = (SV*)newAV();
748a9306 4224 else if (*name == '%')
5f05dabc 4225 sv = (SV*)newHV();
748a9306 4226 else
5f05dabc 4227 sv = NEWSV(0,0);
4228 if (!SvPADBUSY(sv))
4229 SvPADMY_on(sv);
3280af22 4230 PL_curpad[ix] = sv;
748a9306
LW		 4231 }
4232 }
7766f137 4233 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4234 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4235 }
748a9306 4236 else {
aa689395 4237 SV* sv = NEWSV(0,0);
748a9306 4238 SvPADTMP_on(sv);
3280af22 4239 PL_curpad[ix] = sv;
748a9306
LW		 4240 }
4241 }
4242
5f05dabc 4243 /* Now that vars are all in place, clone nested closures. */
4244
9607fc9c 4245 for (ix = fpad; ix > 0; ix--) {
4246 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4247 if (namesv
3280af22 4248 && namesv != &PL_sv_undef
aa689395 4249 && !(SvFLAGS(namesv) & SVf_FAKE)
4250 && *SvPVX(namesv) == '&'
5f05dabc 4251 && CvCLONE(ppad[ix]))
4252 {
4253 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4254 SvREFCNT_dec(ppad[ix]);
4255 CvCLONE_on(kid);
4256 SvPADMY_on(kid);
3280af22 4257 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4258 }
4259 }
4260
5f05dabc 4261#ifdef DEBUG_CLOSURES
ab50184a
CS		 4262 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4263 cv_dump(outside);
4264 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4265 cv_dump(proto);
ab50184a 4266 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4267 cv_dump(cv);
4268#endif
4269
748a9306
LW		 4270 LEAVE;
4271 return cv;
4272}
4273
4274CV *
864dbfa3 4275Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4276{
b099ddc0 4277 CV *cv;
1feb2720 4278 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4279 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4280 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4281 return cv;
5f05dabc 4282}
4283
3fe9a6f1 4284void
864dbfa3 4285Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4286{
0453d815
PM		 4287 dTHR;
4288
e476b1b5 4289 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4290 SV* msg = sv_newmortal();
3fe9a6f1 4291 SV* name = Nullsv;
4292
4293 if (gv)
46fc3d4c 4294 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4295 sv_setpv(msg, "Prototype mismatch:");
4296 if (name)
894356b3 4297 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4298 if (SvPOK(cv))
cea2e8a9 4299 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4300 sv_catpv(msg, " vs ");
4301 if (p)
cea2e8a9 4302 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4303 else
4304 sv_catpv(msg, "none");
e476b1b5 4305 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4306 }
4307}
4308
760ac839 4309SV *
864dbfa3 4310Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4311{
54310121 4312 if (!cv || !SvPOK(cv) || SvCUR(cv))
4313 return Nullsv;
fe5e78ed
GS		 4314 return op_const_sv(CvSTART(cv), cv);
4315}
760ac839 4316
fe5e78ed 4317SV *
864dbfa3 4318Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4319{
4320 SV *sv = Nullsv;
4321
0f79a09d 4322 if (!o)
fe5e78ed
GS		 4323 return Nullsv;
4324
0f79a09d 4325 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4326 o = cLISTOPo->op_first->op_sibling;
4327
4328 for (; o; o = o->op_next) {
54310121 4329 OPCODE type = o->op_type;
fe5e78ed 4330
acb36ea4 4331 if (sv && o->op_next == o)
fe5e78ed 4332 return sv;
54310121 4333 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4334 continue;
4335 if (type == OP_LEAVESUB || type == OP_RETURN)
4336 break;
4337 if (sv)
4338 return Nullsv;
7766f137 4339 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4340 sv = cSVOPo->op_sv;
7766f137 4341 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4342 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4343 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4344 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4345 return Nullsv;
760ac839 4346 }
54310121 4347 else
4348 return Nullsv;
760ac839 4349 }
5aabfad6 4350 if (sv)
4351 SvREADONLY_on(sv);
760ac839
LW		 4352 return sv;
4353}
4354
09bef843
SB		 4355void
4356Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4357{
4358 if (o)
4359 SAVEFREEOP(o);
4360 if (proto)
4361 SAVEFREEOP(proto);
4362 if (attrs)
4363 SAVEFREEOP(attrs);
4364 if (block)
4365 SAVEFREEOP(block);
4366 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4367}
4368
748a9306 4369CV *
864dbfa3 4370Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4371{
09bef843
SB		 4372 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4373}
4374
4375CV *
4376Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4377{
11343788 4378 dTHR;
2d8e6c8d 4379 STRLEN n_a;
83ee9e09
GS		 4380 char *name;
4381 char *aname;
4382 GV *gv;
2d8e6c8d 4383 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4384 register CV *cv=0;
a0d0e21e 4385 I32 ix;
79072805 4386
83ee9e09
GS		 4387 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4388 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4389 SV *sv = sv_newmortal();
4390 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4391 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4392 aname = SvPVX(sv);
4393 }
4394 else
4395 aname = Nullch;
4396 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4397 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4398 SVt_PVCV);
4399
11343788 4400 if (o)
5dc0d613 4401 SAVEFREEOP(o);
3fe9a6f1 4402 if (proto)
4403 SAVEFREEOP(proto);
09bef843
SB		 4404 if (attrs)
4405 SAVEFREEOP(attrs);
3fe9a6f1 4406
09bef843 4407 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4408 maximum a prototype before. */
4409 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4410 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4411 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4412 {
e476b1b5 4413 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4414 }
55d729e4
GS		 4415 cv_ckproto((CV*)gv, NULL, ps);
4416 }
4417 if (ps)
4418 sv_setpv((SV*)gv, ps);
4419 else
4420 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4421 SvREFCNT_dec(PL_compcv);
4422 cv = PL_compcv = NULL;
4423 PL_sub_generation++;
55d729e4
GS		 4424 goto noblock;
4425 }
4426
68dc0745 4427 if (!name || GvCVGEN(gv))
4428 cv = Nullcv;
155aba94 4429 else if ((cv = GvCV(gv))) {
3fe9a6f1 4430 cv_ckproto(cv, gv, ps);
68dc0745 4431 /* already defined (or promised)? */
4432 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4433 SV* const_sv;
fe5e78ed 4434 bool const_changed = TRUE;
09bef843 4435 if (!block && !attrs) {
aa689395 4436 /* just a "sub foo;" when &foo is already defined */
3280af22 4437 SAVEFREESV(PL_compcv);
aa689395 4438 goto done;
4439 }
7bac28a0 4440 /* ahem, death to those who redefine active sort subs */
3280af22 4441 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4442 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4443 if (!block)
4444 goto withattrs;
155aba94 4445 if ((const_sv = cv_const_sv(cv)))
fe5e78ed 4446 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
e476b1b5 4447 if ((const_sv || const_changed) && ckWARN(WARN_REDEFINE))
83ee9e09 4448 {
57843af0
GS		 4449 line_t oldline = CopLINE(PL_curcop);
4450 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4451 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4452 const_sv ? "Constant subroutine %s redefined"
09bef843 4453 : "Subroutine %s redefined", name);
57843af0 4454 CopLINE_set(PL_curcop, oldline);
79072805 4455 }
8990e307 4456 SvREFCNT_dec(cv);
68dc0745 4457 cv = Nullcv;
79072805
LW		 4458 }
4459 }
09bef843
SB		 4460 withattrs:
4461 if (attrs) {
4462 HV *stash;
4463 SV *rcv;
4464
4465 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4466 * before we clobber PL_compcv.
4467 */
4468 if (cv && !block) {
4469 rcv = (SV*)cv;
4470 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4471 stash = GvSTASH(CvGV(cv));
4472 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4473 stash = CvSTASH(cv);
4474 else
4475 stash = PL_curstash;
4476 }
4477 else {
4478 /* possibly about to re-define existing subr -- ignore old cv */
4479 rcv = (SV*)PL_compcv;
4480 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4481 stash = GvSTASH(gv);
4482 else
4483 stash = PL_curstash;
4484 }
4485 apply_attrs(stash, rcv, attrs);
4486 }
a0d0e21e 4487 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4488 if (!block) {
4489 /* got here with just attrs -- work done, so bug out */
4490 SAVEFREESV(PL_compcv);
4491 goto done;
4492 }
4633a7c4 4493 cv_undef(cv);
3280af22
NIS		 4494 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4495 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4496 CvOUTSIDE(PL_compcv) = 0;
4497 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4498 CvPADLIST(PL_compcv) = 0;
4499 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4500 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4501 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4502 }
4503 else {
3280af22 4504 cv = PL_compcv;
44a8e56a 4505 if (name) {
4506 GvCV(gv) = cv;
4507 GvCVGEN(gv) = 0;
3280af22 4508 PL_sub_generation++;
44a8e56a 4509 }
a0d0e21e 4510 }
44a8e56a 4511 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4512 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4513 CvSTASH(cv) = PL_curstash;
11343788
MB		 4514#ifdef USE_THREADS
4515 CvOWNER(cv) = 0;
1cfa4ec7 4516 if (!CvMUTEXP(cv)) {
f6aaf501 4517 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4518 MUTEX_INIT(CvMUTEXP(cv));
4519 }
11343788 4520#endif /* USE_THREADS */
8990e307 4521
3fe9a6f1 4522 if (ps)
4523 sv_setpv((SV*)cv, ps);
4633a7c4 4524
3280af22 4525 if (PL_error_count) {
c07a80fd 4526 op_free(block);
4527 block = Nullop;
68dc0745 4528 if (name) {
4529 char *s = strrchr(name, ':');
4530 s = s ? s+1 : name;
6d4c2119
CS		 4531 if (strEQ(s, "BEGIN")) {
4532 char *not_safe =
4533 "BEGIN not safe after errors--compilation aborted";
faef0170 4534 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4535 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4536 else {
4537 /* force display of errors found but not reported */
38a03e6e 4538 sv_catpv(ERRSV, not_safe);
cea2e8a9 4539 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4540 }
4541 }
68dc0745 4542 }
c07a80fd 4543 }
a0d0e21e 4544 if (!block) {
55d729e4 4545 noblock:
3280af22 4546 PL_copline = NOLINE;
a0d0e21e
LW		 4547 LEAVE_SCOPE(floor);
4548 return cv;
4549 }
4550
3280af22
NIS		 4551 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4552 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4553
7766f137
GS		 4554 if (CvLVALUE(cv)) {
4555 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4556 }
4557 else {
4558 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4559 }
4560 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4561 OpREFCNT_set(CvROOT(cv), 1);
4562 CvSTART(cv) = LINKLIST(CvROOT(cv));
4563 CvROOT(cv)->op_next = 0;
4564 peep(CvSTART(cv));
4565
4566 /* now that optimizer has done its work, adjust pad values */
54310121 4567 if (CvCLONE(cv)) {
3280af22
NIS		 4568 SV **namep = AvARRAY(PL_comppad_name);
4569 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4570 SV *namesv;
4571
7766f137 4572 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4573 continue;
4574 /*
4575 * The only things that a clonable function needs in its
4576 * pad are references to outer lexicals and anonymous subs.
4577 * The rest are created anew during cloning.
4578 */
4579 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4580 namesv != &PL_sv_undef &&
54310121 4581 (SvFAKE(namesv) ||
4582 *SvPVX(namesv) == '&')))
4583 {
3280af22
NIS		 4584 SvREFCNT_dec(PL_curpad[ix]);
4585 PL_curpad[ix] = Nullsv;
54310121 4586 }
4587 }
a0d0e21e 4588 }
54310121 4589 else {
4590 AV *av = newAV(); /* Will be @_ */
4591 av_extend(av, 0);
3280af22 4592 av_store(PL_comppad, 0, (SV*)av);
54310121 4593 AvFLAGS(av) = AVf_REIFY;
79072805 4594
3280af22 4595 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4596 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4597 continue;
3280af22
NIS		 4598 if (!SvPADMY(PL_curpad[ix]))
4599 SvPADTMP_on(PL_curpad[ix]);
54310121 4600 }
4601 }
79072805 4602
83ee9e09 4603 if (name || aname) {
44a8e56a 4604 char *s;
83ee9e09 4605 char *tname = (name ? name : aname);
44a8e56a 4606
3280af22 4607 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4608 SV *sv = NEWSV(0,0);
44a8e56a 4609 SV *tmpstr = sv_newmortal();
549bb64a 4610 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4611 CV *pcv;
44a8e56a 4612 HV *hv;
4613
ed094faf
GS		 4614 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4615 CopFILE(PL_curcop),
cc49e20b 4616 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4617 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4618 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4619 hv = GvHVn(db_postponed);
9607fc9c 4620 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4621 && (pcv = GvCV(db_postponed)))
4622 {
44a8e56a 4623 dSP;
924508f0 4624 PUSHMARK(SP);
44a8e56a 4625 XPUSHs(tmpstr);
4626 PUTBACK;
83ee9e09 4627 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4628 }
4629 }
79072805 4630
83ee9e09 4631 if ((s = strrchr(tname,':')))
28757baa 4632 s++;
4633 else
83ee9e09 4634 s = tname;
ed094faf 4635
7d30b5c4 4636 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4637 goto done;
4638
68dc0745 4639 if (strEQ(s, "BEGIN")) {
3280af22 4640 I32 oldscope = PL_scopestack_ix;
28757baa 4641 ENTER;
57843af0
GS		 4642 SAVECOPFILE(&PL_compiling);
4643 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4644 save_svref(&PL_rs);
4645 sv_setsv(PL_rs, PL_nrs);
28757baa 4646
3280af22
NIS		 4647 if (!PL_beginav)
4648 PL_beginav = newAV();
28757baa 4649 DEBUG_x( dump_sub(gv) );
ed094faf 4650 av_push(PL_beginav, SvREFCNT_inc(cv));
28757baa 4651 GvCV(gv) = 0;
3280af22 4652 call_list(oldscope, PL_beginav);
a6006777 4653
3280af22 4654 PL_curcop = &PL_compiling;
a0ed51b3 4655 PL_compiling.op_private = PL_hints;
28757baa 4656 LEAVE;
4657 }
3280af22
NIS		 4658 else if (strEQ(s, "END") && !PL_error_count) {
4659 if (!PL_endav)
4660 PL_endav = newAV();
ed094faf 4661 DEBUG_x( dump_sub(gv) );
3280af22 4662 av_unshift(PL_endav, 1);
ed094faf 4663 av_store(PL_endav, 0, SvREFCNT_inc(cv));
28757baa 4664 GvCV(gv) = 0;
4665 }
7d30b5c4
GS		 4666 else if (strEQ(s, "CHECK") && !PL_error_count) {
4667 if (!PL_checkav)
4668 PL_checkav = newAV();
ed094faf 4669 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4670 if (PL_main_start && ckWARN(WARN_VOID))
4671 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4672 av_unshift(PL_checkav, 1);
4673 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4674 GvCV(gv) = 0;
4675 }
3280af22
NIS		 4676 else if (strEQ(s, "INIT") && !PL_error_count) {
4677 if (!PL_initav)
4678 PL_initav = newAV();
ed094faf 4679 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4680 if (PL_main_start && ckWARN(WARN_VOID))
4681 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
3280af22 4682 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 4683 GvCV(gv) = 0;
ae77835f 4684 }
79072805 4685 }
a6006777 4686
aa689395 4687 done:
3280af22 4688 PL_copline = NOLINE;
8990e307 4689 LEAVE_SCOPE(floor);
a0d0e21e 4690 return cv;
79072805
LW		 4691}
4692
b099ddc0 4693/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4694/*
4695=for apidoc newCONSTSUB
4696
4697Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4698eligible for inlining at compile-time.
4699
4700=cut
4701*/
4702
5476c433 4703void
864dbfa3 4704Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4705{
4706 dTHR;
5476c433 4707
11faa288
GS		 4708 ENTER;
4709 SAVECOPLINE(PL_curcop);
4710 SAVEHINTS();
4711
4712 CopLINE_set(PL_curcop, PL_copline);
3280af22 4713 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4714
4715 if (stash) {
4716 SAVESPTR(PL_curstash);
4717 SAVECOPSTASH(PL_curcop);
4718 PL_curstash = stash;
4719#ifdef USE_ITHREADS
4720 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4721#else
4722 CopSTASH(PL_curcop) = stash;
4723#endif
4724 }
5476c433 4725
09bef843 4726 newATTRSUB(
be24f278 4727 start_subparse(FALSE, 0),
5476c433 4728 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4729 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4730 Nullop,
5476c433
JD		 4731 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4732 );
4733
11faa288 4734 LEAVE;
5476c433
JD		 4735}
4736
954c1994
GS		 4737/*
4738=for apidoc U||newXS
4739
4740Used by C<xsubpp> to hook up XSUBs as Perl subs.
4741
4742=cut
4743*/
4744
57d3b86d 4745CV *
864dbfa3 4746Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4747{
11343788 4748 dTHR;
44a8e56a 4749 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4750 register CV *cv;
44a8e56a 4751
155aba94 4752 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4753 if (GvCVGEN(gv)) {
4754 /* just a cached method */
4755 SvREFCNT_dec(cv);
4756 cv = 0;
4757 }
4758 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4759 /* already defined (or promised) */
599cee73 4760 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4761 && HvNAME(GvSTASH(CvGV(cv)))
4762 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4763 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4764 if (PL_copline != NOLINE)
57843af0 4765 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4766 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4767 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4768 }
4769 SvREFCNT_dec(cv);
4770 cv = 0;
79072805 4771 }
79072805 4772 }
44a8e56a 4773
4774 if (cv) /* must reuse cv if autoloaded */
4775 cv_undef(cv);
a0d0e21e
LW		 4776 else {
4777 cv = (CV*)NEWSV(1105,0);
4778 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4779 if (name) {
4780 GvCV(gv) = cv;
4781 GvCVGEN(gv) = 0;
3280af22 4782 PL_sub_generation++;
44a8e56a 4783 }
a0d0e21e 4784 }
5196be3e 4785 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4786#ifdef USE_THREADS
12ca11f6 4787 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4788 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4789 CvOWNER(cv) = 0;
4790#endif /* USE_THREADS */
b195d487 4791 (void)gv_fetchfile(filename);
57843af0
GS		 4792 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4793 an external constant string */
a0d0e21e 4794 CvXSUB(cv) = subaddr;
44a8e56a 4795
28757baa 4796 if (name) {
4797 char *s = strrchr(name,':');
4798 if (s)
4799 s++;
4800 else
4801 s = name;
ed094faf 4802
7d30b5c4 4803 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4804 goto done;
4805
28757baa 4806 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4807 if (!PL_beginav)
4808 PL_beginav = newAV();
ed094faf 4809 av_push(PL_beginav, SvREFCNT_inc(cv));
44a8e56a 4810 GvCV(gv) = 0;
28757baa 4811 }
4812 else if (strEQ(s, "END")) {
3280af22
NIS		 4813 if (!PL_endav)
4814 PL_endav = newAV();
4815 av_unshift(PL_endav, 1);
ed094faf 4816 av_store(PL_endav, 0, SvREFCNT_inc(cv));
44a8e56a 4817 GvCV(gv) = 0;
28757baa 4818 }
7d30b5c4
GS		 4819 else if (strEQ(s, "CHECK")) {
4820 if (!PL_checkav)
4821 PL_checkav = newAV();
ddda08b7
GS		 4822 if (PL_main_start && ckWARN(WARN_VOID))
4823 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4
GS		 4824 av_unshift(PL_checkav, 1);
4825 av_store(PL_checkav, 0, SvREFCNT_inc(cv));
4f25aa18
GS		 4826 GvCV(gv) = 0;
4827 }
7d07dbc2 4828 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4829 if (!PL_initav)
4830 PL_initav = newAV();
ddda08b7
GS		 4831 if (PL_main_start && ckWARN(WARN_VOID))
4832 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ed094faf 4833 av_push(PL_initav, SvREFCNT_inc(cv));
f8f842e4 4834 GvCV(gv) = 0;
ae77835f 4835 }
28757baa 4836 }
8990e307 4837 else
a5f75d66 4838 CvANON_on(cv);
44a8e56a 4839
ed094faf 4840done:
a0d0e21e 4841 return cv;
79072805
LW		 4842}
4843
4844void
864dbfa3 4845Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4846{
11343788 4847 dTHR;
79072805
LW		 4848 register CV *cv;
4849 char *name;
4850 GV *gv;
a0d0e21e 4851 I32 ix;
2d8e6c8d 4852 STRLEN n_a;
79072805 4853
11343788 4854 if (o)
2d8e6c8d 4855 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4856 else
4857 name = "STDOUT";
85e6fe83 4858 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4859 GvMULTI_on(gv);
155aba94 4860 if ((cv = GvFORM(gv))) {
599cee73 4861 if (ckWARN(WARN_REDEFINE)) {
57843af0 4862 line_t oldline = CopLINE(PL_curcop);
79072805 4863
57843af0 4864 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4865 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4866 CopLINE_set(PL_curcop, oldline);
79072805 4867 }
8990e307 4868 SvREFCNT_dec(cv);
79072805 4869 }
3280af22 4870 cv = PL_compcv;
79072805 4871 GvFORM(gv) = cv;
44a8e56a 4872 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4873 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4874
3280af22
NIS		 4875 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4876 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4877 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4878 }
4879
79072805 4880 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4881 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4882 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4883 CvSTART(cv) = LINKLIST(CvROOT(cv));
4884 CvROOT(cv)->op_next = 0;
4885 peep(CvSTART(cv));
11343788 4886 op_free(o);
3280af22 4887 PL_copline = NOLINE;
8990e307 4888 LEAVE_SCOPE(floor);
79072805
LW		 4889}
4890
4891OP *
864dbfa3 4892Perl_newANONLIST(pTHX_ OP *o)
79072805 4893{
93a17b20 4894 return newUNOP(OP_REFGEN, 0,
11343788 4895 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4896}
4897
4898OP *
864dbfa3 4899Perl_newANONHASH(pTHX_ OP *o)
79072805 4900{
93a17b20 4901 return newUNOP(OP_REFGEN, 0,
11343788 4902 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4903}
4904
4905OP *
864dbfa3 4906Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4907{
09bef843
SB		 4908 return newANONATTRSUB(floor, proto, Nullop, block);
4909}
4910
4911OP *
4912Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4913{
a0d0e21e 4914 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4915 newSVOP(OP_ANONCODE, 0,
4916 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4917}
4918
4919OP *
864dbfa3 4920Perl_oopsAV(pTHX_ OP *o)
79072805 4921{
ed6116ce
LW		 4922 switch (o->op_type) {
4923 case OP_PADSV:
4924 o->op_type = OP_PADAV;
22c35a8c 4925 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4926 return ref(o, OP_RV2AV);
ed6116ce
LW		 4927
4928 case OP_RV2SV:
79072805 4929 o->op_type = OP_RV2AV;
22c35a8c 4930 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4931 ref(o, OP_RV2AV);
ed6116ce
LW		 4932 break;
4933
4934 default:
0453d815
PM		 4935 if (ckWARN_d(WARN_INTERNAL))
4936 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4937 break;
4938 }
79072805
LW		 4939 return o;
4940}
4941
4942OP *
864dbfa3 4943Perl_oopsHV(pTHX_ OP *o)
79072805 4944{
0453d815 4945 dTHR;
0453d815 4946
ed6116ce
LW		 4947 switch (o->op_type) {
4948 case OP_PADSV:
4949 case OP_PADAV:
4950 o->op_type = OP_PADHV;
22c35a8c 4951 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4952 return ref(o, OP_RV2HV);
ed6116ce
LW		 4953
4954 case OP_RV2SV:
4955 case OP_RV2AV:
79072805 4956 o->op_type = OP_RV2HV;
22c35a8c 4957 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4958 ref(o, OP_RV2HV);
ed6116ce
LW		 4959 break;
4960
4961 default:
0453d815
PM		 4962 if (ckWARN_d(WARN_INTERNAL))
4963 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 4964 break;
4965 }
79072805
LW		 4966 return o;
4967}
4968
4969OP *
864dbfa3 4970Perl_newAVREF(pTHX_ OP *o)
79072805 4971{
ed6116ce
LW		 4972 if (o->op_type == OP_PADANY) {
4973 o->op_type = OP_PADAV;
22c35a8c 4974 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4975 return o;
ed6116ce 4976 }
79072805
LW		 4977 return newUNOP(OP_RV2AV, 0, scalar(o));
4978}
4979
4980OP *
864dbfa3 4981Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 4982{
82092f1d 4983 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 4984 return newUNOP(OP_NULL, 0, o);
748a9306 4985 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4986}
4987
4988OP *
864dbfa3 4989Perl_newHVREF(pTHX_ OP *o)
79072805 4990{
ed6116ce
LW		 4991 if (o->op_type == OP_PADANY) {
4992 o->op_type = OP_PADHV;
22c35a8c 4993 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4994 return o;
ed6116ce 4995 }
79072805
LW		 4996 return newUNOP(OP_RV2HV, 0, scalar(o));
4997}
4998
4999OP *
864dbfa3 5000Perl_oopsCV(pTHX_ OP *o)
79072805 5001{
cea2e8a9 5002 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5003 /* STUB */
5004 return o;
5005}
5006
5007OP *
864dbfa3 5008Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5009{
c07a80fd 5010 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5011}
5012
5013OP *
864dbfa3 5014Perl_newSVREF(pTHX_ OP *o)
79072805 5015{
ed6116ce
LW		 5016 if (o->op_type == OP_PADANY) {
5017 o->op_type = OP_PADSV;
22c35a8c 5018 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5019 return o;
ed6116ce 5020 }
224a4551
MB		 5021 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5022 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5023 return o;
224a4551 5024 }
79072805
LW		 5025 return newUNOP(OP_RV2SV, 0, scalar(o));
5026}
5027
5028/* Check routines. */
5029
5030OP *
cea2e8a9 5031Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5032{
178c6305
CS		 5033 PADOFFSET ix;
5034 SV* name;
5035
5036 name = NEWSV(1106,0);
5037 sv_upgrade(name, SVt_PVNV);
5038 sv_setpvn(name, "&", 1);
5039 SvIVX(name) = -1;
5040 SvNVX(name) = 1;
5dc0d613 5041 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5042 av_store(PL_comppad_name, ix, name);
5043 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5044 SvPADMY_on(cSVOPo->op_sv);
5045 cSVOPo->op_sv = Nullsv;
5046 cSVOPo->op_targ = ix;
5047 return o;
5f05dabc 5048}
5049
5050OP *
cea2e8a9 5051Perl_ck_bitop(pTHX_ OP *o)
55497cff 5052{
3280af22 5053 o->op_private = PL_hints;
5dc0d613 5054 return o;
55497cff 5055}
5056
5057OP *
cea2e8a9 5058Perl_ck_concat(pTHX_ OP *o)
79072805 5059{
11343788
MB		 5060 if (cUNOPo->op_first->op_type == OP_CONCAT)
5061 o->op_flags |= OPf_STACKED;
5062 return o;
79072805
LW		 5063}
5064
5065OP *
cea2e8a9 5066Perl_ck_spair(pTHX_ OP *o)
79072805 5067{
11343788 5068 if (o->op_flags & OPf_KIDS) {
79072805 5069 OP* newop;
a0d0e21e 5070 OP* kid;
5dc0d613
MB		 5071 OPCODE type = o->op_type;
5072 o = modkids(ck_fun(o), type);
11343788 5073 kid = cUNOPo->op_first;
a0d0e21e
LW		 5074 newop = kUNOP->op_first->op_sibling;
5075 if (newop &&
5076 (newop->op_sibling ||
22c35a8c 5077 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5078 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5079 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5080
11343788 5081 return o;
a0d0e21e
LW		 5082 }
5083 op_free(kUNOP->op_first);
5084 kUNOP->op_first = newop;
5085 }
22c35a8c 5086 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5087 return ck_fun(o);
a0d0e21e
LW		 5088}
5089
5090OP *
cea2e8a9 5091Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5092{
11343788 5093 o = ck_fun(o);
5dc0d613 5094 o->op_private = 0;
11343788
MB		 5095 if (o->op_flags & OPf_KIDS) {
5096 OP *kid = cUNOPo->op_first;
01020589
GS		 5097 switch (kid->op_type) {
5098 case OP_ASLICE:
5099 o->op_flags |= OPf_SPECIAL;
5100 /* FALL THROUGH */
5101 case OP_HSLICE:
5dc0d613 5102 o->op_private |= OPpSLICE;
01020589
GS		 5103 break;
5104 case OP_AELEM:
5105 o->op_flags |= OPf_SPECIAL;
5106 /* FALL THROUGH */
5107 case OP_HELEM:
5108 break;
5109 default:
5110 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5111 PL_op_desc[o->op_type]);
01020589 5112 }
a0d0e21e 5113 null(kid);
79072805 5114 }
11343788 5115 return o;
79072805
LW		 5116}
5117
5118OP *
cea2e8a9 5119Perl_ck_eof(pTHX_ OP *o)
79072805 5120{
11343788 5121 I32 type = o->op_type;
79072805 5122
11343788
MB		 5123 if (o->op_flags & OPf_KIDS) {
5124 if (cLISTOPo->op_first->op_type == OP_STUB) {
5125 op_free(o);
5126 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5127 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5128 }
11343788 5129 return ck_fun(o);
79072805 5130 }
11343788 5131 return o;
79072805
LW		 5132}
5133
5134OP *
cea2e8a9 5135Perl_ck_eval(pTHX_ OP *o)
79072805 5136{
3280af22 5137 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5138 if (o->op_flags & OPf_KIDS) {
5139 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5140
93a17b20 5141 if (!kid) {
11343788
MB		 5142 o->op_flags &= ~OPf_KIDS;
5143 null(o);
79072805
LW		 5144 }
5145 else if (kid->op_type == OP_LINESEQ) {
5146 LOGOP *enter;
5147
11343788
MB		 5148 kid->op_next = o->op_next;
5149 cUNOPo->op_first = 0;
5150 op_free(o);
79072805 5151
b7dc083c 5152 NewOp(1101, enter, 1, LOGOP);
79072805 5153 enter->op_type = OP_ENTERTRY;
22c35a8c 5154 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5155 enter->op_private = 0;
5156
5157 /* establish postfix order */
5158 enter->op_next = (OP*)enter;
5159
11343788
MB		 5160 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5161 o->op_type = OP_LEAVETRY;
22c35a8c 5162 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5163 enter->op_other = o;
5164 return o;
79072805 5165 }
c7cc6f1c 5166 else
473986ff 5167 scalar((OP*)kid);
79072805
LW		 5168 }
5169 else {
11343788 5170 op_free(o);
54b9620d 5171 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5172 }
3280af22 5173 o->op_targ = (PADOFFSET)PL_hints;
11343788 5174 return o;
79072805
LW		 5175}
5176
5177OP *
d98f61e7
GS		 5178Perl_ck_exit(pTHX_ OP *o)
5179{
5180#ifdef VMS
5181 HV *table = GvHV(PL_hintgv);
5182 if (table) {
5183 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5184 if (svp && *svp && SvTRUE(*svp))
5185 o->op_private |= OPpEXIT_VMSISH;
5186 }
5187#endif
5188 return ck_fun(o);
5189}
5190
5191OP *
cea2e8a9 5192Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5193{
5194 OP *kid;
11343788
MB		 5195 if (o->op_flags & OPf_STACKED) {
5196 o = ck_fun(o);
5197 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5198 if (kid->op_type == OP_RV2GV)
5199 null(kid);
79072805 5200 }
463ee0b2 5201 else
11343788
MB		 5202 o = listkids(o);
5203 return o;
79072805
LW		 5204}
5205
5206OP *
cea2e8a9 5207Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5208{
5196be3e
MB		 5209 o = ck_fun(o);
5210 if (o->op_flags & OPf_KIDS) {
5211 OP *kid = cUNOPo->op_first;
afebc493
GS		 5212 if (kid->op_type == OP_ENTERSUB) {
5213 (void) ref(kid, o->op_type);
5214 if (kid->op_type != OP_RV2CV && !PL_error_count)
5215 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5216 PL_op_desc[o->op_type]);
5217 o->op_private |= OPpEXISTS_SUB;
5218 }
5219 else if (kid->op_type == OP_AELEM)
01020589
GS		 5220 o->op_flags |= OPf_SPECIAL;
5221 else if (kid->op_type != OP_HELEM)
5222 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5223 PL_op_desc[o->op_type]);
5f05dabc 5224 null(kid);
5225 }
5196be3e 5226 return o;
5f05dabc 5227}
5228
22c35a8c 5229#if 0
5f05dabc 5230OP *
cea2e8a9 5231Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5232{
5233 o = fold_constants(o);
5234 if (o->op_type == OP_CONST)
5235 o->op_type = OP_GV;
5236 return o;
5237}
22c35a8c 5238#endif
79072805
LW		 5239
5240OP *
cea2e8a9 5241Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5242{
11343788
MB		 5243 dTHR;
5244 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5245
3280af22 5246 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5247 if (kid->op_type == OP_CONST) {
44a8e56a 5248 char *name;
5249 int iscv;
5250 GV *gv;
779c5bc9 5251 SV *kidsv = kid->op_sv;
2d8e6c8d 5252 STRLEN n_a;
44a8e56a 5253
779c5bc9
GS		 5254 /* Is it a constant from cv_const_sv()? */
5255 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5256 SV *rsv = SvRV(kidsv);
5257 int svtype = SvTYPE(rsv);
5258 char *badtype = Nullch;
5259
5260 switch (o->op_type) {
5261 case OP_RV2SV:
5262 if (svtype > SVt_PVMG)
5263 badtype = "a SCALAR";
5264 break;
5265 case OP_RV2AV:
5266 if (svtype != SVt_PVAV)
5267 badtype = "an ARRAY";
5268 break;
5269 case OP_RV2HV:
5270 if (svtype != SVt_PVHV) {
5271 if (svtype == SVt_PVAV) { /* pseudohash? */
5272 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5273 if (ksv && SvROK(*ksv)
5274 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5275 {
5276 break;
5277 }
5278 }
5279 badtype = "a HASH";
5280 }
5281 break;
5282 case OP_RV2CV:
5283 if (svtype != SVt_PVCV)
5284 badtype = "a CODE";
5285 break;
5286 }
5287 if (badtype)
cea2e8a9 5288 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5289 return o;
5290 }
2d8e6c8d 5291 name = SvPV(kidsv, n_a);
3280af22 5292 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5293 char *badthing = Nullch;
5dc0d613 5294 switch (o->op_type) {
44a8e56a 5295 case OP_RV2SV:
5296 badthing = "a SCALAR";
5297 break;
5298 case OP_RV2AV:
5299 badthing = "an ARRAY";
5300 break;
5301 case OP_RV2HV:
5302 badthing = "a HASH";
5303 break;
5304 }
5305 if (badthing)
cea2e8a9 5306 Perl_croak(aTHX_
44a8e56a 5307 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5308 name, badthing);
5309 }
93233ece
CS		 5310 /*
5311 * This is a little tricky. We only want to add the symbol if we
5312 * didn't add it in the lexer. Otherwise we get duplicate strict
5313 * warnings. But if we didn't add it in the lexer, we must at
5314 * least pretend like we wanted to add it even if it existed before,
5315 * or we get possible typo warnings. OPpCONST_ENTERED says
5316 * whether the lexer already added THIS instance of this symbol.
5317 */
5196be3e 5318 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5319 do {
44a8e56a 5320 gv = gv_fetchpv(name,
748a9306 5321 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5322 iscv
5323 ? SVt_PVCV
11343788 5324 : o->op_type == OP_RV2SV
a0d0e21e 5325 ? SVt_PV
11343788 5326 : o->op_type == OP_RV2AV
a0d0e21e 5327 ? SVt_PVAV
11343788 5328 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5329 ? SVt_PVHV
5330 : SVt_PVGV);
93233ece
CS		 5331 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5332 if (gv) {
5333 kid->op_type = OP_GV;
5334 SvREFCNT_dec(kid->op_sv);
350de78d 5335#ifdef USE_ITHREADS
638eceb6 5336 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5337 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
743e66e6 5338 GvIN_PAD_on(gv);
350de78d
GS		 5339 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5340#else
93233ece 5341 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5342#endif
76cd736e 5343 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5344 }
79072805 5345 }
11343788 5346 return o;
79072805
LW		 5347}
5348
5349OP *
cea2e8a9 5350Perl_ck_ftst(pTHX_ OP *o)
79072805 5351{
11343788
MB		 5352 dTHR;
5353 I32 type = o->op_type;
79072805 5354
d0dca557
JD		 5355 if (o->op_flags & OPf_REF) {
5356 /* nothing */
5357 }
5358 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5359 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5360
5361 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5362 STRLEN n_a;
a0d0e21e 5363 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5364 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5365 op_free(o);
d0dca557 5366 o = newop;
79072805
LW		 5367 }
5368 }
5369 else {
11343788 5370 op_free(o);
79072805 5371 if (type == OP_FTTTY)
d0dca557 5372 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5373 SVt_PVIO));
79072805 5374 else
d0dca557 5375 o = newUNOP(type, 0, newDEFSVOP());
79072805 5376 }
d0dca557
JD		 5377#ifdef USE_LOCALE
5378 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5379 o->op_private = 0;
5380 if (PL_hints & HINT_LOCALE)
5381 o->op_private |= OPpLOCALE;
5382 }
5383#endif
11343788 5384 return o;
79072805
LW		 5385}
5386
5387OP *
cea2e8a9 5388Perl_ck_fun(pTHX_ OP *o)
79072805 5389{
11343788 5390 dTHR;
79072805
LW		 5391 register OP *kid;
5392 OP **tokid;
5393 OP *sibl;
5394 I32 numargs = 0;
11343788 5395 int type = o->op_type;
22c35a8c 5396 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5397
11343788 5398 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5399 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5400 oa &= ~OA_OPTIONAL;
5401 else
11343788 5402 return no_fh_allowed(o);
79072805
LW		 5403 }
5404
11343788 5405 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5406 STRLEN n_a;
11343788
MB		 5407 tokid = &cLISTOPo->op_first;
5408 kid = cLISTOPo->op_first;
8990e307 5409 if (kid->op_type == OP_PUSHMARK ||
155aba94 5410 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5411 {
79072805
LW		 5412 tokid = &kid->op_sibling;
5413 kid = kid->op_sibling;
5414 }
22c35a8c 5415 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5416 *tokid = kid = newDEFSVOP();
79072805
LW		 5417
5418 while (oa && kid) {
5419 numargs++;
5420 sibl = kid->op_sibling;
5421 switch (oa & 7) {
5422 case OA_SCALAR:
62c18ce2
GS		 5423 /* list seen where single (scalar) arg expected? */
5424 if (numargs == 1 && !(oa >> 4)
5425 && kid->op_type == OP_LIST && type != OP_SCALAR)
5426 {
5427 return too_many_arguments(o,PL_op_desc[type]);
5428 }
79072805
LW		 5429 scalar(kid);
5430 break;
5431 case OA_LIST:
5432 if (oa < 16) {
5433 kid = 0;
5434 continue;
5435 }
5436 else
5437 list(kid);
5438 break;
5439 case OA_AVREF:
5440 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5441 (kid->op_private & OPpCONST_BARE))
5442 {
2d8e6c8d 5443 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5444 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5445 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5446 if (ckWARN(WARN_DEPRECATED))
5447 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5448 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5449 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5450 op_free(kid);
5451 kid = newop;
5452 kid->op_sibling = sibl;
5453 *tokid = kid;
5454 }
8990e307 5455 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5456 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5457 mod(kid, type);
79072805
LW		 5458 break;
5459 case OA_HVREF:
5460 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5461 (kid->op_private & OPpCONST_BARE))
5462 {
2d8e6c8d 5463 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5464 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5465 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5466 if (ckWARN(WARN_DEPRECATED))
5467 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5468 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5469 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5470 op_free(kid);
5471 kid = newop;
5472 kid->op_sibling = sibl;
5473 *tokid = kid;
5474 }
8990e307 5475 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5476 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5477 mod(kid, type);
79072805
LW		 5478 break;
5479 case OA_CVREF:
5480 {
a0d0e21e 5481 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5482 kid->op_sibling = 0;
5483 linklist(kid);
5484 newop->op_next = newop;
5485 kid = newop;
5486 kid->op_sibling = sibl;
5487 *tokid = kid;
5488 }
5489 break;
5490 case OA_FILEREF:
c340be78 5491 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5492 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5493 (kid->op_private & OPpCONST_BARE))
5494 {
79072805 5495 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5496 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5497 SVt_PVIO) );
79072805
LW		 5498 op_free(kid);
5499 kid = newop;
5500 }
1ea32a52
GS		 5501 else if (kid->op_type == OP_READLINE) {
5502 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5503 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5504 }
79072805 5505 else {
35cd451c 5506 I32 flags = OPf_SPECIAL;
a6c40364 5507 I32 priv = 0;
2c8ac474
GS		 5508 PADOFFSET targ = 0;
5509
35cd451c 5510 /* is this op a FH constructor? */
853846ea 5511 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5512 char *name = Nullch;
5513 STRLEN len;
5514
5515 flags = 0;
5516 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5517 * need to "prove" flag does not mean something
5518 * else already - NI-S 1999/05/07
2c8ac474
GS		 5519 */
5520 priv = OPpDEREF;
5521 if (kid->op_type == OP_PADSV) {
5522 SV **namep = av_fetch(PL_comppad_name,
5523 kid->op_targ, 4);
5524 if (namep && *namep)
5525 name = SvPV(*namep, len);
5526 }
5527 else if (kid->op_type == OP_RV2SV
5528 && kUNOP->op_first->op_type == OP_GV)
5529 {
5530 GV *gv = cGVOPx_gv(kUNOP->op_first);
5531 name = GvNAME(gv);
5532 len = GvNAMELEN(gv);
5533 }
afd1915d
GS		 5534 else if (kid->op_type == OP_AELEM
5535 || kid->op_type == OP_HELEM)
5536 {
5537 name = "__ANONIO__";
5538 len = 10;
5539 mod(kid,type);
5540 }
2c8ac474
GS		 5541 if (name) {
5542 SV *namesv;
5543 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5544 namesv = PL_curpad[targ];
155aba94 5545 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5546 if (*name != '$')
5547 sv_setpvn(namesv, "$", 1);
5548 sv_catpvn(namesv, name, len);
5549 }
853846ea 5550 }
79072805 5551 kid->op_sibling = 0;
35cd451c 5552 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5553 kid->op_targ = targ;
5554 kid->op_private |= priv;
79072805
LW		 5555 }
5556 kid->op_sibling = sibl;
5557 *tokid = kid;
5558 }
5559 scalar(kid);
5560 break;
5561 case OA_SCALARREF:
a0d0e21e 5562 mod(scalar(kid), type);
79072805
LW		 5563 break;
5564 }
5565 oa >>= 4;
5566 tokid = &kid->op_sibling;
5567 kid = kid->op_sibling;
5568 }
11343788 5569 o->op_private |= numargs;
79072805 5570 if (kid)
22c35a8c 5571 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5572 listkids(o);
79072805 5573 }
22c35a8c 5574 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5575 op_free(o);
54b9620d 5576 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5577 }
5578
79072805
LW		 5579 if (oa) {
5580 while (oa & OA_OPTIONAL)
5581 oa >>= 4;
5582 if (oa && oa != OA_LIST)
22c35a8c 5583 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5584 }
11343788 5585 return o;
79072805
LW		 5586}
5587
5588OP *
cea2e8a9 5589Perl_ck_glob(pTHX_ OP *o)
79072805 5590{
fb73857a 5591 GV *gv;
5592
649da076 5593 o = ck_fun(o);
1f2bfc8a 5594 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5595 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5596
5597 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5598 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5599
52bb0670 5600#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5601 /* XXX this can be tightened up and made more failsafe. */
5602 if (!gv) {
72b16652 5603 ENTER;
e4783991
GS		 5604 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5605 /* null-terminated import list */
5606 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5607 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5608 LEAVE;
5609 }
52bb0670 5610#endif /* PERL_EXTERNAL_GLOB */
72b16652 5611
b1cb66bf 5612 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5613 append_elem(OP_GLOB, o,
80252599 5614 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5615 o->op_type = OP_LIST;
22c35a8c 5616 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5617 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5618 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5619 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5620 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5621 scalar(newUNOP(OP_RV2CV, 0,
5622 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5623 o = newUNOP(OP_NULL, 0, ck_subr(o));
5624 o->op_targ = OP_GLOB; /* hint at what it used to be */
5625 return o;
b1cb66bf 5626 }
5627 gv = newGVgen("main");
a0d0e21e 5628 gv_IOadd(gv);
11343788
MB		 5629 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5630 scalarkids(o);
649da076 5631 return o;
79072805
LW		 5632}
5633
5634OP *
cea2e8a9 5635Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5636{
5637 LOGOP *gwop;
5638 OP *kid;
11343788 5639 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5640
22c35a8c 5641 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5642 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5643
11343788 5644 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5645 OP* k;
11343788
MB		 5646 o = ck_sort(o);
5647 kid = cLISTOPo->op_first->op_sibling;
5648 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5649 kid = k;
5650 }
5651 kid->op_next = (OP*)gwop;
11343788 5652 o->op_flags &= ~OPf_STACKED;
93a17b20 5653 }
11343788 5654 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5655 if (type == OP_MAPWHILE)
5656 list(kid);
5657 else
5658 scalar(kid);
11343788 5659 o = ck_fun(o);
3280af22 5660 if (PL_error_count)
11343788 5661 return o;
aeea060c 5662 kid = cLISTOPo->op_first->op_sibling;
79072805 5663 if (kid->op_type != OP_NULL)
cea2e8a9 5664 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5665 kid = kUNOP->op_first;
5666
a0d0e21e 5667 gwop->op_type = type;
22c35a8c 5668 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5669 gwop->op_first = listkids(o);
79072805
LW		 5670 gwop->op_flags |= OPf_KIDS;
5671 gwop->op_private = 1;
5672 gwop->op_other = LINKLIST(kid);
a0d0e21e 5673 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5674 kid->op_next = (OP*)gwop;
5675
11343788 5676 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5677 if (!kid || !kid->op_sibling)
22c35a8c 5678 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5679 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5680 mod(kid, OP_GREPSTART);
5681
79072805
LW		 5682 return (OP*)gwop;
5683}
5684
5685OP *
cea2e8a9 5686Perl_ck_index(pTHX_ OP *o)
79072805 5687{
11343788
MB		 5688 if (o->op_flags & OPf_KIDS) {
5689 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5690 if (kid)
5691 kid = kid->op_sibling; /* get past "big" */
79072805 5692 if (kid && kid->op_type == OP_CONST)
2779dcf1 5693 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5694 }
11343788 5695 return ck_fun(o);
79072805
LW		 5696}
5697
5698OP *
cea2e8a9 5699Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5700{
5701 /* XXX length optimization goes here */
11343788 5702 return ck_fun(o);
79072805
LW		 5703}
5704
5705OP *
cea2e8a9 5706Perl_ck_lfun(pTHX_ OP *o)
79072805 5707{
5dc0d613
MB		 5708 OPCODE type = o->op_type;
5709 return modkids(ck_fun(o), type);
79072805
LW		 5710}
5711
5712OP *
cea2e8a9 5713Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5714{
20ce7b12 5715 dTHR;
d0334bed
GS		 5716 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5717 switch (cUNOPo->op_first->op_type) {
5718 case OP_RV2AV:
7e291ef1 5719 break; /* Globals via GV can be undef */
d0334bed
GS		 5720 case OP_PADAV:
5721 case OP_AASSIGN: /* Is this a good idea? */
5722 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5723 "defined(@array) is deprecated");
d0334bed 5724 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5725 "\t(Maybe you should just omit the defined()?)\n");
69794302 5726 break;
d0334bed 5727 case OP_RV2HV:
7e291ef1 5728 break; /* Globals via GV can be undef */
d0334bed
GS		 5729 case OP_PADHV:
5730 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5731 "defined(%%hash) is deprecated");
d0334bed 5732 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5733 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5734 break;
5735 default:
5736 /* no warning */
5737 break;
5738 }
69794302
MJD		 5739 }
5740 return ck_rfun(o);
5741}
5742
5743OP *
cea2e8a9 5744Perl_ck_rfun(pTHX_ OP *o)
8990e307 5745{
5dc0d613
MB		 5746 OPCODE type = o->op_type;
5747 return refkids(ck_fun(o), type);
8990e307
LW		 5748}
5749
5750OP *
cea2e8a9 5751Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5752{
5753 register OP *kid;
aeea060c 5754
11343788 5755 kid = cLISTOPo->op_first;
79072805 5756 if (!kid) {
11343788
MB		 5757 o = force_list(o);
5758 kid = cLISTOPo->op_first;
79072805
LW		 5759 }
5760 if (kid->op_type == OP_PUSHMARK)
5761 kid = kid->op_sibling;
11343788 5762 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5763 kid = kid->op_sibling;
5764 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5765 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5766 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5767 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5768 cLISTOPo->op_first->op_sibling = kid;
5769 cLISTOPo->op_last = kid;
79072805
LW		 5770 kid = kid->op_sibling;
5771 }
5772 }
5773
5774 if (!kid)
54b9620d 5775 append_elem(o->op_type, o, newDEFSVOP());
79072805 5776
5dc0d613 5777 o = listkids(o);
bbce6d69 5778
5dc0d613 5779 o->op_private = 0;
36477c24 5780#ifdef USE_LOCALE
3280af22 5781 if (PL_hints & HINT_LOCALE)
5dc0d613 5782 o->op_private |= OPpLOCALE;
bbce6d69 5783#endif
5784
5dc0d613 5785 return o;
bbce6d69 5786}
5787
5788OP *
cea2e8a9 5789Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5790{
5dc0d613 5791 o = ck_fun(o);
bbce6d69 5792
5dc0d613 5793 o->op_private = 0;
36477c24 5794#ifdef USE_LOCALE
3280af22 5795 if (PL_hints & HINT_LOCALE)
5dc0d613 5796 o->op_private |= OPpLOCALE;
bbce6d69 5797#endif
5798
5dc0d613 5799 return o;
bbce6d69 5800}
5801
5802OP *
b162f9ea
IZ		 5803Perl_ck_sassign(pTHX_ OP *o)
5804{
5805 OP *kid = cLISTOPo->op_first;
5806 /* has a disposable target? */
5807 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5808 && !(kid->op_flags & OPf_STACKED)
5809 /* Cannot steal the second time! */
5810 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5811 {
5812 OP *kkid = kid->op_sibling;
5813
5814 /* Can just relocate the target. */
2c2d71f5
JH		 5815 if (kkid && kkid->op_type == OP_PADSV
5816 && !(kkid->op_private & OPpLVAL_INTRO))
5817 {
b162f9ea 5818 kid->op_targ = kkid->op_targ;
743e66e6 5819 kkid->op_targ = 0;
b162f9ea
IZ		 5820 /* Now we do not need PADSV and SASSIGN. */
5821 kid->op_sibling = o->op_sibling; /* NULL */
5822 cLISTOPo->op_first = NULL;
5823 op_free(o);
5824 op_free(kkid);
5825 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5826 return kid;
5827 }
5828 }
5829 return o;
5830}
5831
5832OP *
cea2e8a9 5833Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5834{
5dc0d613 5835 o->op_private = 0;
36477c24 5836#ifdef USE_LOCALE
3280af22 5837 if (PL_hints & HINT_LOCALE)
5dc0d613 5838 o->op_private |= OPpLOCALE;
bbce6d69 5839#endif
36477c24 5840
5dc0d613 5841 return o;
79072805
LW		 5842}
5843
5844OP *
cea2e8a9 5845Perl_ck_match(pTHX_ OP *o)
79072805 5846{
5dc0d613 5847 o->op_private |= OPpRUNTIME;
11343788 5848 return o;
79072805
LW		 5849}
5850
5851OP *
f5d5a27c
CS		 5852Perl_ck_method(pTHX_ OP *o)
5853{
5854 OP *kid = cUNOPo->op_first;
5855 if (kid->op_type == OP_CONST) {
5856 SV* sv = kSVOP->op_sv;
5857 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5858 OP *cmop;
155aba94
GS		 5859 (void)SvUPGRADE(sv, SVt_PVIV);
5860 (void)SvIOK_on(sv);
f5d5a27c
CS		 5861 PERL_HASH(SvUVX(sv), SvPVX(sv), SvCUR(sv));
5862 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
5863 kSVOP->op_sv = Nullsv;
5864 op_free(o);
5865 return cmop;
5866 }
5867 }
5868 return o;
5869}
5870
5871OP *
cea2e8a9 5872Perl_ck_null(pTHX_ OP *o)
79072805 5873{
11343788 5874 return o;
79072805
LW		 5875}
5876
5877OP *
16fe6d59
GS		 5878Perl_ck_open(pTHX_ OP *o)
5879{
5880 HV *table = GvHV(PL_hintgv);
5881 if (table) {
5882 SV **svp;
5883 I32 mode;
5884 svp = hv_fetch(table, "open_IN", 7, FALSE);
5885 if (svp && *svp) {
5886 mode = mode_from_discipline(*svp);
5887 if (mode & O_BINARY)
5888 o->op_private |= OPpOPEN_IN_RAW;
5889 else if (mode & O_TEXT)
5890 o->op_private |= OPpOPEN_IN_CRLF;
5891 }
5892
5893 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5894 if (svp && *svp) {
5895 mode = mode_from_discipline(*svp);
5896 if (mode & O_BINARY)
5897 o->op_private |= OPpOPEN_OUT_RAW;
5898 else if (mode & O_TEXT)
5899 o->op_private |= OPpOPEN_OUT_CRLF;
5900 }
5901 }
5902 if (o->op_type == OP_BACKTICK)
5903 return o;
5904 return ck_fun(o);
5905}
5906
5907OP *
cea2e8a9 5908Perl_ck_repeat(pTHX_ OP *o)
79072805 5909{
11343788
MB		 5910 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5911 o->op_private |= OPpREPEAT_DOLIST;
5912 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5913 }
5914 else
11343788
MB		 5915 scalar(o);
5916 return o;
79072805
LW		 5917}
5918
5919OP *
cea2e8a9 5920Perl_ck_require(pTHX_ OP *o)
8990e307 5921{
11343788
MB		 5922 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5923 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5924
5925 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5926 char *s;
a0d0e21e
LW		 5927 for (s = SvPVX(kid->op_sv); *s; s++) {
5928 if (*s == ':' && s[1] == ':') {
5929 *s = '/';
1aef975c 5930 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5931 --SvCUR(kid->op_sv);
5932 }
8990e307 5933 }
ce3b816e
GS		 5934 if (SvREADONLY(kid->op_sv)) {
5935 SvREADONLY_off(kid->op_sv);
5936 sv_catpvn(kid->op_sv, ".pm", 3);
5937 SvREADONLY_on(kid->op_sv);
5938 }
5939 else
5940 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 5941 }
5942 }
11343788 5943 return ck_fun(o);
8990e307
LW		 5944}
5945
22c35a8c 5946#if 0
8990e307 5947OP *
cea2e8a9 5948Perl_ck_retarget(pTHX_ OP *o)
79072805 5949{
cea2e8a9 5950 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 5951 /* STUB */
11343788 5952 return o;
79072805 5953}
22c35a8c 5954#endif
79072805
LW		 5955
5956OP *
cea2e8a9 5957Perl_ck_select(pTHX_ OP *o)
79072805 5958{
c07a80fd 5959 OP* kid;
11343788
MB		 5960 if (o->op_flags & OPf_KIDS) {
5961 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 5962 if (kid && kid->op_sibling) {
11343788 5963 o->op_type = OP_SSELECT;
22c35a8c 5964 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 5965 o = ck_fun(o);
5966 return fold_constants(o);
79072805
LW		 5967 }
5968 }
11343788
MB		 5969 o = ck_fun(o);
5970 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 5971 if (kid && kid->op_type == OP_RV2GV)
5972 kid->op_private &= ~HINT_STRICT_REFS;
11343788 5973 return o;
79072805
LW		 5974}
5975
5976OP *
cea2e8a9 5977Perl_ck_shift(pTHX_ OP *o)
79072805 5978{
11343788 5979 I32 type = o->op_type;
79072805 5980
11343788 5981 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5982 OP *argop;
5983
11343788 5984 op_free(o);
6d4ff0d2 5985#ifdef USE_THREADS
533c011a 5986 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5987 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5988 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5989 }
5990 else {
5991 argop = newUNOP(OP_RV2AV, 0,
5992 scalar(newGVOP(OP_GV, 0,
5993 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5994 }
5995#else
5996 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5997 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5998 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5999#endif /* USE_THREADS */
6000 return newUNOP(type, 0, scalar(argop));
79072805 6001 }
11343788 6002 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6003}
6004
6005OP *
cea2e8a9 6006Perl_ck_sort(pTHX_ OP *o)
79072805 6007{
8e3f9bdf 6008 OP *firstkid;
5dc0d613 6009 o->op_private = 0;
36477c24 6010#ifdef USE_LOCALE
3280af22 6011 if (PL_hints & HINT_LOCALE)
5dc0d613 6012 o->op_private |= OPpLOCALE;
bbce6d69 6013#endif
6014
9ea6e965 6015 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6016 simplify_sort(o);
8e3f9bdf
GS		 6017 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6018 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6019 OP *k;
8e3f9bdf 6020 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6021
463ee0b2 6022 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6023 linklist(kid);
463ee0b2
LW		 6024 if (kid->op_type == OP_SCOPE) {
6025 k = kid->op_next;
6026 kid->op_next = 0;
79072805 6027 }
463ee0b2 6028 else if (kid->op_type == OP_LEAVE) {
11343788 6029 if (o->op_type == OP_SORT) {
748a9306
LW		 6030 null(kid); /* wipe out leave */
6031 kid->op_next = kid;
463ee0b2 6032
748a9306
LW		 6033 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6034 if (k->op_next == kid)
6035 k->op_next = 0;
71a29c3c
GS		 6036 /* don't descend into loops */
6037 else if (k->op_type == OP_ENTERLOOP
6038 || k->op_type == OP_ENTERITER)
6039 {
6040 k = cLOOPx(k)->op_lastop;
6041 }
748a9306 6042 }
463ee0b2 6043 }
748a9306
LW		 6044 else
6045 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6046 k = kLISTOP->op_first;
463ee0b2 6047 }
a0d0e21e
LW		 6048 peep(k);
6049
8e3f9bdf
GS		 6050 kid = firstkid;
6051 if (o->op_type == OP_SORT) {
6052 /* provide scalar context for comparison function/block */
6053 kid = scalar(kid);
a0d0e21e 6054 kid->op_next = kid;
8e3f9bdf 6055 }
a0d0e21e
LW		 6056 else
6057 kid->op_next = k;
11343788 6058 o->op_flags |= OPf_SPECIAL;
79072805 6059 }
c6e96bcb 6060 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6061 null(firstkid);
6062
6063 firstkid = firstkid->op_sibling;
79072805 6064 }
bbce6d69 6065
8e3f9bdf
GS		 6066 /* provide list context for arguments */
6067 if (o->op_type == OP_SORT)
6068 list(firstkid);
6069
11343788 6070 return o;
79072805 6071}
bda4119b
GS		 6072
6073STATIC void
cea2e8a9 6074S_simplify_sort(pTHX_ OP *o)
9c007264 6075{
51a19bc0 6076 dTHR;
9c007264
JH		 6077 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6078 OP *k;
6079 int reversed;
350de78d 6080 GV *gv;
9c007264
JH		 6081 if (!(o->op_flags & OPf_STACKED))
6082 return;
9ea6e965
GS		 6083 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6084 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6085 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6086 if (kid->op_type != OP_SCOPE)
6087 return;
6088 kid = kLISTOP->op_last; /* get past scope */
6089 switch(kid->op_type) {
6090 case OP_NCMP:
6091 case OP_I_NCMP:
6092 case OP_SCMP:
6093 break;
6094 default:
6095 return;
6096 }
6097 k = kid; /* remember this node*/
6098 if (kBINOP->op_first->op_type != OP_RV2SV)
6099 return;
6100 kid = kBINOP->op_first; /* get past cmp */
6101 if (kUNOP->op_first->op_type != OP_GV)
6102 return;
6103 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6104 gv = kGVOP_gv;
350de78d 6105 if (GvSTASH(gv) != PL_curstash)
9c007264 6106 return;
350de78d 6107 if (strEQ(GvNAME(gv), "a"))
9c007264 6108 reversed = 0;
0f79a09d 6109 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6110 reversed = 1;
6111 else
6112 return;
6113 kid = k; /* back to cmp */
6114 if (kBINOP->op_last->op_type != OP_RV2SV)
6115 return;
6116 kid = kBINOP->op_last; /* down to 2nd arg */
6117 if (kUNOP->op_first->op_type != OP_GV)
6118 return;
6119 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6120 gv = kGVOP_gv;
350de78d 6121 if (GvSTASH(gv) != PL_curstash
9c007264 6122 || ( reversed
350de78d
GS		 6123 ? strNE(GvNAME(gv), "a")
6124 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6125 return;
6126 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6127 if (reversed)
6128 o->op_private |= OPpSORT_REVERSE;
6129 if (k->op_type == OP_NCMP)
6130 o->op_private |= OPpSORT_NUMERIC;
6131 if (k->op_type == OP_I_NCMP)
6132 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6133 kid = cLISTOPo->op_first->op_sibling;
6134 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6135 op_free(kid); /* then delete it */
6136 cLISTOPo->op_children--;
9c007264 6137}
79072805
LW		 6138
6139OP *
cea2e8a9 6140Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6141{
6142 register OP *kid;
aeea060c 6143
11343788
MB		 6144 if (o->op_flags & OPf_STACKED)
6145 return no_fh_allowed(o);
79072805 6146
11343788 6147 kid = cLISTOPo->op_first;
8990e307 6148 if (kid->op_type != OP_NULL)
cea2e8a9 6149 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6150 kid = kid->op_sibling;
11343788
MB		 6151 op_free(cLISTOPo->op_first);
6152 cLISTOPo->op_first = kid;
85e6fe83 6153 if (!kid) {
79cb57f6 6154 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6155 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6156 }
79072805
LW		 6157
6158 if (kid->op_type != OP_MATCH) {
6159 OP *sibl = kid->op_sibling;
463ee0b2 6160 kid->op_sibling = 0;
79072805 6161 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6162 if (cLISTOPo->op_first == cLISTOPo->op_last)
6163 cLISTOPo->op_last = kid;
6164 cLISTOPo->op_first = kid;
79072805
LW		 6165 kid->op_sibling = sibl;
6166 }
6167
6168 kid->op_type = OP_PUSHRE;
22c35a8c 6169 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6170 scalar(kid);
6171
6172 if (!kid->op_sibling)
54b9620d 6173 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6174
6175 kid = kid->op_sibling;
6176 scalar(kid);
6177
6178 if (!kid->op_sibling)
11343788 6179 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6180
6181 kid = kid->op_sibling;
6182 scalar(kid);
6183
6184 if (kid->op_sibling)
22c35a8c 6185 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6186
11343788 6187 return o;
79072805
LW		 6188}
6189
6190OP *
eb6e2d6f
GS		 6191Perl_ck_join(pTHX_ OP *o)
6192{
6193 if (ckWARN(WARN_SYNTAX)) {
6194 OP *kid = cLISTOPo->op_first->op_sibling;
6195 if (kid && kid->op_type == OP_MATCH) {
6196 char *pmstr = "STRING";
6197 if (kPMOP->op_pmregexp)
6198 pmstr = kPMOP->op_pmregexp->precomp;
6199 Perl_warner(aTHX_ WARN_SYNTAX,
6200 "/%s/ should probably be written as \"%s\"",
6201 pmstr, pmstr);
6202 }
6203 }
6204 return ck_fun(o);
6205}
6206
6207OP *
cea2e8a9 6208Perl_ck_subr(pTHX_ OP *o)
79072805 6209{
11343788
MB		 6210 dTHR;
6211 OP *prev = ((cUNOPo->op_first->op_sibling)
6212 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6213 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6214 OP *cvop;
6215 char *proto = 0;
6216 CV *cv = 0;
46fc3d4c 6217 GV *namegv = 0;
4633a7c4
LW		 6218 int optional = 0;
6219 I32 arg = 0;
2d8e6c8d 6220 STRLEN n_a;
4633a7c4 6221
d3011074 6222 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6223 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6224 if (cvop->op_type == OP_RV2CV) {
6225 SVOP* tmpop;
11343788 6226 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6227 null(cvop); /* disable rv2cv */
6228 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6229 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6230 GV *gv = cGVOPx_gv(tmpop);
350de78d 6231 cv = GvCVu(gv);
76cd736e
GS		 6232 if (!cv)
6233 tmpop->op_private |= OPpEARLY_CV;
6234 else if (SvPOK(cv)) {
350de78d 6235 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6236 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6237 }
4633a7c4
LW		 6238 }
6239 }
f5d5a27c 6240 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6241 if (o2->op_type == OP_CONST)
6242 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6243 else if (o2->op_type == OP_LIST) {
6244 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6245 if (o && o->op_type == OP_CONST)
6246 o->op_private &= ~OPpCONST_STRICT;
6247 }
7a52d87a 6248 }
3280af22
NIS		 6249 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6250 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6251 o->op_private |= OPpENTERSUB_DB;
6252 while (o2 != cvop) {
4633a7c4
LW		 6253 if (proto) {
6254 switch (*proto) {
6255 case '\0':
5dc0d613 6256 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6257 case ';':
6258 optional = 1;
6259 proto++;
6260 continue;
6261 case '$':
6262 proto++;
6263 arg++;
11343788 6264 scalar(o2);
4633a7c4
LW		 6265 break;
6266 case '%':
6267 case '@':
11343788 6268 list(o2);
4633a7c4
LW		 6269 arg++;
6270 break;
6271 case '&':
6272 proto++;
6273 arg++;
11343788 6274 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6275 bad_type(arg,
6276 arg == 1 ? "block or sub {}" : "sub {}",
6277 gv_ename(namegv), o2);
4633a7c4
LW		 6278 break;
6279 case '*':
2ba6ecf4 6280 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6281 proto++;
6282 arg++;
11343788 6283 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6284 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6285 else if (o2->op_type == OP_CONST)
6286 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6287 else if (o2->op_type == OP_ENTERSUB) {
6288 /* accidental subroutine, revert to bareword */
6289 OP *gvop = ((UNOP*)o2)->op_first;
6290 if (gvop && gvop->op_type == OP_NULL) {
6291 gvop = ((UNOP*)gvop)->op_first;
6292 if (gvop) {
6293 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6294 ;
6295 if (gvop &&
6296 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6297 (gvop = ((UNOP*)gvop)->op_first) &&
6298 gvop->op_type == OP_GV)
6299 {
638eceb6 6300 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6301 OP *sibling = o2->op_sibling;
2692f720 6302 SV *n = newSVpvn("",0);
9675f7ac 6303 op_free(o2);
2692f720
GS		 6304 gv_fullname3(n, gv, "");
6305 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6306 sv_chop(n, SvPVX(n)+6);
6307 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6308 prev->op_sibling = o2;
6309 o2->op_sibling = sibling;
6310 }
6311 }
6312 }
6313 }
2ba6ecf4
GS		 6314 scalar(o2);
6315 break;
4633a7c4
LW		 6316 case '\\':
6317 proto++;
6318 arg++;
6319 switch (*proto++) {
6320 case '*':
11343788 6321 if (o2->op_type != OP_RV2GV)
5dc0d613 6322 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6323 goto wrapref;
6324 case '&':
75fc29ea
GS		 6325 if (o2->op_type != OP_ENTERSUB)
6326 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6327 goto wrapref;
6328 case '$':
386acf99
GS		 6329 if (o2->op_type != OP_RV2SV
6330 && o2->op_type != OP_PADSV
1c01eb51
GS		 6331 && o2->op_type != OP_HELEM
6332 && o2->op_type != OP_AELEM
386acf99
GS		 6333 && o2->op_type != OP_THREADSV)
6334 {
5dc0d613 6335 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6336 }
4633a7c4
LW		 6337 goto wrapref;
6338 case '@':
11343788 6339 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6340 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6341 goto wrapref;
6342 case '%':
11343788 6343 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6344 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6345 wrapref:
6346 {
11343788 6347 OP* kid = o2;
6fa846a0 6348 OP* sib = kid->op_sibling;
4633a7c4 6349 kid->op_sibling = 0;
6fa846a0
GS		 6350 o2 = newUNOP(OP_REFGEN, 0, kid);
6351 o2->op_sibling = sib;
e858de61 6352 prev->op_sibling = o2;
4633a7c4
LW		 6353 }
6354 break;
6355 default: goto oops;
6356 }
6357 break;
b1cb66bf 6358 case ' ':
6359 proto++;
6360 continue;
4633a7c4
LW		 6361 default:
6362 oops:
cea2e8a9 6363 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6364 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6365 }
6366 }
6367 else
11343788
MB		 6368 list(o2);
6369 mod(o2, OP_ENTERSUB);
6370 prev = o2;
6371 o2 = o2->op_sibling;
4633a7c4 6372 }
fb73857a 6373 if (proto && !optional &&
6374 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6375 return too_few_arguments(o, gv_ename(namegv));
11343788 6376 return o;
79072805
LW		 6377}
6378
6379OP *
cea2e8a9 6380Perl_ck_svconst(pTHX_ OP *o)
8990e307 6381{
11343788
MB		 6382 SvREADONLY_on(cSVOPo->op_sv);
6383 return o;
8990e307
LW		 6384}
6385
6386OP *
cea2e8a9 6387Perl_ck_trunc(pTHX_ OP *o)
79072805 6388{
11343788
MB		 6389 if (o->op_flags & OPf_KIDS) {
6390 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6391
a0d0e21e
LW		 6392 if (kid->op_type == OP_NULL)
6393 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6394 if (kid && kid->op_type == OP_CONST &&
6395 (kid->op_private & OPpCONST_BARE))
6396 {
11343788 6397 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6398 kid->op_private &= ~OPpCONST_STRICT;
6399 }
79072805 6400 }
11343788 6401 return ck_fun(o);
79072805
LW		 6402}
6403
463ee0b2
LW		 6404/* A peephole optimizer. We visit the ops in the order they're to execute. */
6405
79072805 6406void
864dbfa3 6407Perl_peep(pTHX_ register OP *o)
79072805 6408{
11343788 6409 dTHR;
79072805 6410 register OP* oldop = 0;
2d8e6c8d 6411 STRLEN n_a;
cd06dffe 6412 OP *last_composite = Nullop;
2d8e6c8d 6413
a0d0e21e 6414 if (!o || o->op_seq)
79072805 6415 return;
a0d0e21e 6416 ENTER;
462e5cf6 6417 SAVEOP();
7766f137 6418 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6419 for (; o; o = o->op_next) {
6420 if (o->op_seq)
6421 break;
3280af22
NIS		 6422 if (!PL_op_seqmax)
6423 PL_op_seqmax++;
533c011a 6424 PL_op = o;
a0d0e21e 6425 switch (o->op_type) {
acb36ea4 6426 case OP_SETSTATE:
a0d0e21e
LW		 6427 case OP_NEXTSTATE:
6428 case OP_DBSTATE:
3280af22
NIS		 6429 PL_curcop = ((COP*)o); /* for warnings */
6430 o->op_seq = PL_op_seqmax++;
cd06dffe 6431 last_composite = Nullop;
a0d0e21e
LW		 6432 break;
6433
a0d0e21e 6434 case OP_CONST:
7a52d87a
GS		 6435 if (cSVOPo->op_private & OPpCONST_STRICT)
6436 no_bareword_allowed(o);
7766f137
GS		 6437#ifdef USE_ITHREADS
6438 /* Relocate sv to the pad for thread safety.
6439 * Despite being a "constant", the SV is written to,
6440 * for reference counts, sv_upgrade() etc. */
6441 if (cSVOP->op_sv) {
6442 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6443 if (SvPADTMP(cSVOPo->op_sv)) {
6444 /* If op_sv is already a PADTMP then it is being used by
6445 * another pad, so make a copy. */
6446 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6447 SvREADONLY_on(PL_curpad[ix]);
6448 SvREFCNT_dec(cSVOPo->op_sv);
6449 }
6450 else {
6451 SvREFCNT_dec(PL_curpad[ix]);
6452 SvPADTMP_on(cSVOPo->op_sv);
6453 PL_curpad[ix] = cSVOPo->op_sv;
6454 }
7766f137
GS		 6455 cSVOPo->op_sv = Nullsv;
6456 o->op_targ = ix;
6457 }
6458#endif
07447971
GS		 6459 o->op_seq = PL_op_seqmax++;
6460 break;
6461
ed7ab888 6462 case OP_CONCAT:
b162f9ea
IZ		 6463 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6464 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6465 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6466 goto ignore_optimization;
cd06dffe 6467 else {
07447971 6468 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6469 o->op_targ = o->op_next->op_targ;
743e66e6 6470 o->op_next->op_targ = 0;
2c2d71f5 6471 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6472 }
6473 }
a0d0e21e 6474 null(o->op_next);
b162f9ea
IZ		 6475 }
6476 ignore_optimization:
3280af22 6477 o->op_seq = PL_op_seqmax++;
a0d0e21e 6478 break;
8990e307 6479 case OP_STUB:
54310121 6480 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6481 o->op_seq = PL_op_seqmax++;
54310121 6482 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6483 }
748a9306 6484 goto nothin;
79072805 6485 case OP_NULL:
acb36ea4
GS		 6486 if (o->op_targ == OP_NEXTSTATE
6487 || o->op_targ == OP_DBSTATE
6488 || o->op_targ == OP_SETSTATE)
6489 {
3280af22 6490 PL_curcop = ((COP*)o);
acb36ea4 6491 }
748a9306 6492 goto nothin;
79072805 6493 case OP_SCALAR:
93a17b20 6494 case OP_LINESEQ:
463ee0b2 6495 case OP_SCOPE:
748a9306 6496 nothin:
a0d0e21e
LW		 6497 if (oldop && o->op_next) {
6498 oldop->op_next = o->op_next;
79072805
LW		 6499 continue;
6500 }
3280af22 6501 o->op_seq = PL_op_seqmax++;
79072805
LW		 6502 break;
6503
6504 case OP_GV:
a0d0e21e 6505 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6506 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6507 null(o->op_next);
64aac5a9
GS		 6508 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6509 | OPpOUR_INTRO);
a0d0e21e
LW		 6510 o->op_next = o->op_next->op_next;
6511 o->op_type = OP_GVSV;
22c35a8c 6512 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6513 }
6514 }
a0d0e21e
LW		 6515 else if (o->op_next->op_type == OP_RV2AV) {
6516 OP* pop = o->op_next->op_next;
6517 IV i;
8990e307 6518 if (pop->op_type == OP_CONST &&
533c011a 6519 (PL_op = pop->op_next) &&
8990e307 6520 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6521 !(pop->op_next->op_private &
68dc0745 6522 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6523 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6524 <= 255 &&
8990e307
LW		 6525 i >= 0)
6526 {
350de78d 6527 GV *gv;
a0d0e21e 6528 null(o->op_next);
8990e307
LW		 6529 null(pop->op_next);
6530 null(pop);
a0d0e21e
LW		 6531 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6532 o->op_next = pop->op_next->op_next;
6533 o->op_type = OP_AELEMFAST;
22c35a8c 6534 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6535 o->op_private = (U8)i;
638eceb6 6536 gv = cGVOPo_gv;
350de78d 6537 GvAVn(gv);
8990e307 6538 }
79072805 6539 }
e476b1b5 6540 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6541 GV *gv = cGVOPo_gv;
76cd736e
GS		 6542 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6543 /* XXX could check prototype here instead of just carping */
6544 SV *sv = sv_newmortal();
6545 gv_efullname3(sv, gv, Nullch);
e476b1b5 6546 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6547 "%s() called too early to check prototype",
6548 SvPV_nolen(sv));
6549 }
6550 }
6551
3280af22 6552 o->op_seq = PL_op_seqmax++;
79072805
LW		 6553 break;
6554
a0d0e21e 6555 case OP_MAPWHILE:
79072805
LW		 6556 case OP_GREPWHILE:
6557 case OP_AND:
6558 case OP_OR:
2c2d71f5
JH		 6559 case OP_ANDASSIGN:
6560 case OP_ORASSIGN:
1a67a97c
SM		 6561 case OP_COND_EXPR:
6562 case OP_RANGE:
3280af22 6563 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6564 while (cLOGOP->op_other->op_type == OP_NULL)
6565 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6566 peep(cLOGOP->op_other);
6567 break;
6568
79072805 6569 case OP_ENTERLOOP:
3280af22 6570 o->op_seq = PL_op_seqmax++;
79072805
LW		 6571 peep(cLOOP->op_redoop);
6572 peep(cLOOP->op_nextop);
6573 peep(cLOOP->op_lastop);
6574 break;
6575
8782bef2 6576 case OP_QR:
79072805
LW		 6577 case OP_MATCH:
6578 case OP_SUBST:
3280af22 6579 o->op_seq = PL_op_seqmax++;
a0d0e21e 6580 peep(cPMOP->op_pmreplstart);
79072805
LW		 6581 break;
6582
a0d0e21e 6583 case OP_EXEC:
3280af22 6584 o->op_seq = PL_op_seqmax++;
599cee73
PM		 6585 if (ckWARN(WARN_SYNTAX) && o->op_next
6586 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6587 if (o->op_next->op_sibling &&
20408e3c
GS		 6588 o->op_next->op_sibling->op_type != OP_EXIT &&
6589 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6590 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6591 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6592
57843af0 6593 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6594 Perl_warner(aTHX_ WARN_EXEC,
6595 "Statement unlikely to be reached");
6596 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6597 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6598 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6599 }
6600 }
6601 break;
aeea060c 6602
c750a3ec
MB		 6603 case OP_HELEM: {
6604 UNOP *rop;
6605 SV *lexname;
6606 GV **fields;
9615e741 6607 SV **svp, **indsvp, *sv;
c750a3ec
MB		 6608 I32 ind;
6609 char *key;
6610 STRLEN keylen;
aeea060c 6611
9615e741 6612 o->op_seq = PL_op_seqmax++;
377b21bb 6613 if ((o->op_private & (OPpLVAL_INTRO))
c750a3ec
MB		 6614 || ((BINOP*)o)->op_last->op_type != OP_CONST)
6615 break;
6616 rop = (UNOP*)((BINOP*)o)->op_first;
6617 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6618 break;
3280af22 6619 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6620 if (!SvOBJECT(lexname))
6621 break;
5196be3e 6622 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6623 if (!fields || !GvHV(*fields))
6624 break;
638eceb6 6625 svp = cSVOPx_svp(((BINOP*)o)->op_last);
c750a3ec
MB		 6626 key = SvPV(*svp, keylen);
6627 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6628 if (!indsvp) {
88e9b055 6629 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6630 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6631 }
6632 ind = SvIV(*indsvp);
6633 if (ind < 1)
cea2e8a9 6634 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6635 rop->op_type = OP_RV2AV;
22c35a8c 6636 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6637 o->op_type = OP_AELEM;
22c35a8c 6638 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6639 sv = newSViv(ind);
6640 if (SvREADONLY(*svp))
6641 SvREADONLY_on(sv);
6642 SvFLAGS(sv) |= (SvFLAGS(*svp)
6643 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6644 SvREFCNT_dec(*svp);
9615e741 6645 *svp = sv;
c750a3ec
MB		 6646 break;
6647 }
345599ca
GS		 6648
6649 case OP_HSLICE: {
6650 UNOP *rop;
6651 SV *lexname;
6652 GV **fields;
9615e741 6653 SV **svp, **indsvp, *sv;
345599ca
GS		 6654 I32 ind;
6655 char *key;
6656 STRLEN keylen;
6657 SVOP *first_key_op, *key_op;
9615e741
GS		 6658
6659 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6660 if ((o->op_private & (OPpLVAL_INTRO))
6661 /* I bet there's always a pushmark... */
6662 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6663 /* hmmm, no optimization if list contains only one key. */
6664 break;
6665 rop = (UNOP*)((LISTOP*)o)->op_last;
6666 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6667 break;
6668 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6669 if (!SvOBJECT(lexname))
6670 break;
6671 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6672 if (!fields || !GvHV(*fields))
6673 break;
6674 /* Again guessing that the pushmark can be jumped over.... */
6675 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6676 ->op_first->op_sibling;
6677 /* Check that the key list contains only constants. */
6678 for (key_op = first_key_op; key_op;
6679 key_op = (SVOP*)key_op->op_sibling)
6680 if (key_op->op_type != OP_CONST)
6681 break;
6682 if (key_op)
6683 break;
6684 rop->op_type = OP_RV2AV;
6685 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6686 o->op_type = OP_ASLICE;
6687 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6688 for (key_op = first_key_op; key_op;
6689 key_op = (SVOP*)key_op->op_sibling) {
6690 svp = cSVOPx_svp(key_op);
6691 key = SvPV(*svp, keylen);
6692 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6693 if (!indsvp) {
9615e741
GS		 6694 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6695 "in variable %s of type %s",
345599ca
GS		 6696 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6697 }
6698 ind = SvIV(*indsvp);
6699 if (ind < 1)
6700 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6701 sv = newSViv(ind);
6702 if (SvREADONLY(*svp))
6703 SvREADONLY_on(sv);
6704 SvFLAGS(sv) |= (SvFLAGS(*svp)
6705 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6706 SvREFCNT_dec(*svp);
9615e741 6707 *svp = sv;
345599ca
GS		 6708 }
6709 break;
6710 }
c750a3ec 6711
cd06dffe
GS		 6712 case OP_RV2AV:
6713 case OP_RV2HV:
6714 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6715 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6716 {
cd06dffe 6717 last_composite = o;
e1f15930 6718 }
cd06dffe
GS		 6719 o->op_seq = PL_op_seqmax++;
6720 break;
6721
6722 case OP_RETURN:
970c4905 6723 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6724 o->op_seq = PL_op_seqmax++;
6725 break;
6726 }
6727 /* FALL THROUGH */
6728
6729 case OP_LEAVESUBLV:
6730 if (last_composite) {
6731 OP *r = last_composite;
6732
6733 while (r->op_sibling)
6734 r = r->op_sibling;
6735 if (r->op_next == o
6736 || (r->op_next->op_type == OP_LIST
6737 && r->op_next->op_next == o))
6738 {
6739 if (last_composite->op_type == OP_RV2AV)
6740 yyerror("Lvalue subs returning arrays not implemented yet");
6741 else
6742 yyerror("Lvalue subs returning hashes not implemented yet");
6743 ;
6744 }
6745 }
6746 /* FALL THROUGH */
6747
79072805 6748 default:
3280af22 6749 o->op_seq = PL_op_seqmax++;
79072805
LW		 6750 break;
6751 }
a0d0e21e 6752 oldop = o;
79072805 6753 }
a0d0e21e 6754 LEAVE;
79072805 6755}
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