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a0d0e21e 1/* op.c
79072805 2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
864dbfa3 19#define PERL_IN_OP_C
79072805 20#include "perl.h"
77ca0c92 21#include "keywords.h"
79072805 22
b7dc083c 23/* #define PL_OP_SLAB_ALLOC */
7934575e 24
1c846c1f 25#ifdef PL_OP_SLAB_ALLOC
b7dc083c
NIS		 26#define SLAB_SIZE 8192
27static char *PL_OpPtr = NULL;
28static int PL_OpSpace = 0;
29#define NewOp(m,var,c,type) do { if ((PL_OpSpace -= c*sizeof(type)) >= 0) \
30 var = (type *)(PL_OpPtr -= c*sizeof(type)); \
31 else \
32 var = (type *) Slab_Alloc(m,c*sizeof(type)); \
33 } while (0)
34
1c846c1f 35STATIC void *
cea2e8a9 36S_Slab_Alloc(pTHX_ int m, size_t sz)
1c846c1f 37{
b7dc083c
NIS		 38 Newz(m,PL_OpPtr,SLAB_SIZE,char);
39 PL_OpSpace = SLAB_SIZE - sz;
40 return PL_OpPtr += PL_OpSpace;
41}
76e3520e 42
1c846c1f 43#else
b7dc083c
NIS		 44#define NewOp(m, var, c, type) Newz(m, var, c, type)
45#endif
e50aee73 46/*
5dc0d613 47 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 48 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 49 */
11343788 50#define CHECKOP(type,o) \
3280af22 51 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 52 ? ( op_free((OP*)o), \
cea2e8a9 53 Perl_croak(aTHX_ "%s trapped by operation mask", PL_op_desc[type]), \
28757baa 54 Nullop ) \
fc0dc3b3 55 : CALL_FPTR(PL_check[type])(aTHX_ (OP*)o))
e50aee73 56
c53d7c7d
HS		 57#define PAD_MAX 999999999
58
76e3520e 59STATIC char*
cea2e8a9 60S_gv_ename(pTHX_ GV *gv)
4633a7c4 61{
2d8e6c8d 62 STRLEN n_a;
4633a7c4 63 SV* tmpsv = sv_newmortal();
46fc3d4c 64 gv_efullname3(tmpsv, gv, Nullch);
2d8e6c8d 65 return SvPV(tmpsv,n_a);
4633a7c4
LW		 66}
67
76e3520e 68STATIC OP *
cea2e8a9 69S_no_fh_allowed(pTHX_ OP *o)
79072805 70{
cea2e8a9 71 yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function",
22c35a8c 72 PL_op_desc[o->op_type]));
11343788 73 return o;
79072805
LW		 74}
75
76e3520e 76STATIC OP *
cea2e8a9 77S_too_few_arguments(pTHX_ OP *o, char *name)
79072805 78{
cea2e8a9 79 yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name));
11343788 80 return o;
79072805
LW		 81}
82
76e3520e 83STATIC OP *
cea2e8a9 84S_too_many_arguments(pTHX_ OP *o, char *name)
79072805 85{
cea2e8a9 86 yyerror(Perl_form(aTHX_ "Too many arguments for %s", name));
11343788 87 return o;
79072805
LW		 88}
89
76e3520e 90STATIC void
cea2e8a9 91S_bad_type(pTHX_ I32 n, char *t, char *name, OP *kid)
8990e307 92{
cea2e8a9 93 yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)",
22c35a8c 94 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 95}
96
7a52d87a 97STATIC void
cea2e8a9 98S_no_bareword_allowed(pTHX_ OP *o)
7a52d87a 99{
5a844595
GS		 100 qerror(Perl_mess(aTHX_
101 "Bareword \"%s\" not allowed while \"strict subs\" in use",
7766f137 102 SvPV_nolen(cSVOPo_sv)));
7a52d87a
GS		 103}
104
79072805
LW		 105/* "register" allocation */
106
107PADOFFSET
864dbfa3 108Perl_pad_allocmy(pTHX_ char *name)
93a17b20 109{
11343788 110 dTHR;
a0d0e21e
LW		 111 PADOFFSET off;
112 SV *sv;
113
155aba94
GS		 114 if (!(PL_in_my == KEY_our ||
115 isALPHA(name[1]) ||
116 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
117 (name[1] == '_' && (int)strlen(name) > 2)))
834a4ddd 118 {
c4d0567e 119 if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) {
2b92dfce
GS		 120 /* 1999-02-27 mjd@plover.com */
121 char *p;
122 p = strchr(name, '\0');
123 /* The next block assumes the buffer is at least 205 chars
124 long. At present, it's always at least 256 chars. */
125 if (p-name > 200) {
126 strcpy(name+200, "...");
127 p = name+199;
128 }
129 else {
130 p[1] = '\0';
131 }
132 /* Move everything else down one character */
133 for (; p-name > 2; p--)
134 *p = *(p-1);
46fc3d4c 135 name[2] = toCTRL(name[1]);
136 name[1] = '^';
137 }
cea2e8a9 138 yyerror(Perl_form(aTHX_ "Can't use global %s in \"my\"",name));
a0d0e21e 139 }
e476b1b5 140 if (ckWARN(WARN_MISC) && AvFILLp(PL_comppad_name) >= 0) {
3280af22 141 SV **svp = AvARRAY(PL_comppad_name);
33633739
GS		 142 HV *ourstash = (PL_curstash ? PL_curstash : PL_defstash);
143 PADOFFSET top = AvFILLp(PL_comppad_name);
144 for (off = top; off > PL_comppad_name_floor; off--) {
b1cb66bf 145 if ((sv = svp[off])
3280af22 146 && sv != &PL_sv_undef
c53d7c7d 147 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 148 && (PL_in_my != KEY_our
149 || ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash))
b1cb66bf 150 && strEQ(name, SvPVX(sv)))
151 {
e476b1b5 152 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 153 "\"%s\" variable %s masks earlier declaration in same %s",
33633739
GS		 154 (PL_in_my == KEY_our ? "our" : "my"),
155 name,
156 (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
157 --off;
158 break;
159 }
160 }
161 if (PL_in_my == KEY_our) {
635bab04 162 do {
33633739
GS		 163 if ((sv = svp[off])
164 && sv != &PL_sv_undef
5ce0178e 165 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
33633739
GS		 166 && ((SvFLAGS(sv) & SVpad_OUR) && GvSTASH(sv) == ourstash)
167 && strEQ(name, SvPVX(sv)))
f472eb5c 168 {
e476b1b5 169 Perl_warner(aTHX_ WARN_MISC,
33633739 170 "\"our\" variable %s redeclared", name);
e476b1b5 171 Perl_warner(aTHX_ WARN_MISC,
cc507455 172 "\t(Did you mean \"local\" instead of \"our\"?)\n");
33633739 173 break;
f472eb5c 174 }
635bab04 175 } while ( off-- > 0 );
b1cb66bf 176 }
177 }
a0d0e21e
LW		 178 off = pad_alloc(OP_PADSV, SVs_PADMY);
179 sv = NEWSV(1102,0);
93a17b20
LW		 180 sv_upgrade(sv, SVt_PVNV);
181 sv_setpv(sv, name);
3280af22 182 if (PL_in_my_stash) {
c750a3ec 183 if (*name != '$')
eb64745e
GS		 184 yyerror(Perl_form(aTHX_ "Can't declare class for non-scalar %s in \"%s\"",
185 name, PL_in_my == KEY_our ? "our" : "my"));
c750a3ec
MB		 186 SvOBJECT_on(sv);
187 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 188 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
189 PL_sv_objcount++;
c750a3ec 190 }
f472eb5c
GS		 191 if (PL_in_my == KEY_our) {
192 (void)SvUPGRADE(sv, SVt_PVGV);
ef75a179 193 GvSTASH(sv) = (HV*)SvREFCNT_inc(PL_curstash ? (SV*)PL_curstash : (SV*)PL_defstash);
77ca0c92 194 SvFLAGS(sv) |= SVpad_OUR;
f472eb5c 195 }
3280af22 196 av_store(PL_comppad_name, off, sv);
65202027 197 SvNVX(sv) = (NV)PAD_MAX;
8990e307 198 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 199 if (!PL_min_intro_pending)
200 PL_min_intro_pending = off;
201 PL_max_intro_pending = off;
93a17b20 202 if (*name == '@')
3280af22 203 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 204 else if (*name == '%')
3280af22
NIS		 205 av_store(PL_comppad, off, (SV*)newHV());
206 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 207 return off;
208}
209
94f23f41
GS		 210STATIC PADOFFSET
211S_pad_addlex(pTHX_ SV *proto_namesv)
212{
213 SV *namesv = NEWSV(1103,0);
214 PADOFFSET newoff = pad_alloc(OP_PADSV, SVs_PADMY);
215 sv_upgrade(namesv, SVt_PVNV);
216 sv_setpv(namesv, SvPVX(proto_namesv));
217 av_store(PL_comppad_name, newoff, namesv);
218 SvNVX(namesv) = (NV)PL_curcop->cop_seq;
219 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
220 SvFAKE_on(namesv); /* A ref, not a real var */
221 if (SvFLAGS(proto_namesv) & SVpad_OUR) { /* An "our" variable */
222 SvFLAGS(namesv) |= SVpad_OUR;
223 (void)SvUPGRADE(namesv, SVt_PVGV);
224 GvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)GvSTASH(proto_namesv));
225 }
226 if (SvOBJECT(proto_namesv)) { /* A typed var */
227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(proto_namesv));
230 PL_sv_objcount++;
231 }
232 return newoff;
233}
234
2680586e
GS		 235#define FINDLEX_NOSEARCH 1 /* don't search outer contexts */
236
76e3520e 237STATIC PADOFFSET
cea2e8a9 238S_pad_findlex(pTHX_ char *name, PADOFFSET newoff, U32 seq, CV* startcv,
864dbfa3 239 I32 cx_ix, I32 saweval, U32 flags)
93a17b20 240{
11343788 241 dTHR;
748a9306 242 CV *cv;
93a17b20
LW		 243 I32 off;
244 SV *sv;
93a17b20 245 register I32 i;
c09156bb 246 register PERL_CONTEXT *cx;
93a17b20 247
748a9306 248 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 249 AV *curlist = CvPADLIST(cv);
250 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 251 AV *curname;
4fdae800 252
3280af22 253 if (!svp || *svp == &PL_sv_undef)
4633a7c4 254 continue;
748a9306
LW		 255 curname = (AV*)*svp;
256 svp = AvARRAY(curname);
93965878 257 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 258 if ((sv = svp[off]) &&
3280af22 259 sv != &PL_sv_undef &&
748a9306 260 seq <= SvIVX(sv) &&
13826f2c 261 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 262 strEQ(SvPVX(sv), name))
263 {
5f05dabc 264 I32 depth;
265 AV *oldpad;
266 SV *oldsv;
267
268 depth = CvDEPTH(cv);
269 if (!depth) {
9607fc9c 270 if (newoff) {
271 if (SvFAKE(sv))
272 continue;
4fdae800 273 return 0; /* don't clone from inactive stack frame */
9607fc9c 274 }
5f05dabc 275 depth = 1;
276 }
94f23f41 277 oldpad = (AV*)AvARRAY(curlist)[depth];
5f05dabc 278 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 279 if (!newoff) { /* Not a mere clone operation. */
94f23f41 280 newoff = pad_addlex(sv);
3280af22 281 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 282 /* "It's closures all the way down." */
3280af22 283 CvCLONE_on(PL_compcv);
54310121 284 if (cv == startcv) {
3280af22 285 if (CvANON(PL_compcv))
54310121 286 oldsv = Nullsv; /* no need to keep ref */
287 }
288 else {
28757baa 289 CV *bcv;
290 for (bcv = startcv;
291 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 292 bcv = CvOUTSIDE(bcv))
293 {
94f23f41
GS		 294 if (CvANON(bcv)) {
295 /* install the missing pad entry in intervening
296 * nested subs and mark them cloneable.
297 * XXX fix pad_foo() to not use globals */
298 AV *ocomppad_name = PL_comppad_name;
299 AV *ocomppad = PL_comppad;
300 SV **ocurpad = PL_curpad;
301 AV *padlist = CvPADLIST(bcv);
302 PL_comppad_name = (AV*)AvARRAY(padlist)[0];
303 PL_comppad = (AV*)AvARRAY(padlist)[1];
304 PL_curpad = AvARRAY(PL_comppad);
305 pad_addlex(sv);
306 PL_comppad_name = ocomppad_name;
307 PL_comppad = ocomppad;
308 PL_curpad = ocurpad;
28757baa 309 CvCLONE_on(bcv);
94f23f41 310 }
28757baa 311 else {
6b35e009
GS		 312 if (ckWARN(WARN_CLOSURE)
313 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
314 {
cea2e8a9 315 Perl_warner(aTHX_ WARN_CLOSURE,
44a8e56a 316 "Variable \"%s\" may be unavailable",
28757baa 317 name);
6b35e009 318 }
28757baa 319 break;
320 }
321 }
322 }
323 }
3280af22 324 else if (!CvUNIQUE(PL_compcv)) {
741b6338
GS		 325 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv)
326 && !(SvFLAGS(sv) & SVpad_OUR))
327 {
cea2e8a9 328 Perl_warner(aTHX_ WARN_CLOSURE,
599cee73 329 "Variable \"%s\" will not stay shared", name);
741b6338 330 }
5f05dabc 331 }
748a9306 332 }
3280af22 333 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 334 return newoff;
335 }
93a17b20
LW		 336 }
337 }
338
2680586e
GS		 339 if (flags & FINDLEX_NOSEARCH)
340 return 0;
341
93a17b20
LW		 342 /* Nothing in current lexical context--try eval's context, if any.
343 * This is necessary to let the perldb get at lexically scoped variables.
344 * XXX This will also probably interact badly with eval tree caching.
345 */
346
748a9306 347 for (i = cx_ix; i >= 0; i--) {
93a17b20 348 cx = &cxstack[i];
6b35e009 349 switch (CxTYPE(cx)) {
93a17b20 350 default:
748a9306
LW		 351 if (i == 0 && saweval) {
352 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 353 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval, 0);
748a9306 354 }
93a17b20
LW		 355 break;
356 case CXt_EVAL:
44a8e56a 357 switch (cx->blk_eval.old_op_type) {
358 case OP_ENTEREVAL:
6b35e009
GS		 359 if (CxREALEVAL(cx))
360 saweval = i;
44a8e56a 361 break;
faa7e5bb 362 case OP_DOFILE:
44a8e56a 363 case OP_REQUIRE:
faa7e5bb 364 /* require/do must have their own scope */
44a8e56a 365 return 0;
366 }
93a17b20 367 break;
7766f137 368 case CXt_FORMAT:
93a17b20
LW		 369 case CXt_SUB:
370 if (!saweval)
371 return 0;
372 cv = cx->blk_sub.cv;
3280af22 373 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 374 saweval = i; /* so we know where we were called from */
93a17b20 375 continue;
93a17b20 376 }
748a9306 377 seq = cxstack[saweval].blk_oldcop->cop_seq;
2680586e 378 return pad_findlex(name, newoff, seq, cv, i-1, saweval,FINDLEX_NOSEARCH);
93a17b20
LW		 379 }
380 }
381
748a9306
LW		 382 return 0;
383}
a0d0e21e 384
748a9306 385PADOFFSET
864dbfa3 386Perl_pad_findmy(pTHX_ char *name)
748a9306 387{
11343788 388 dTHR;
748a9306 389 I32 off;
54310121 390 I32 pendoff = 0;
748a9306 391 SV *sv;
3280af22
NIS		 392 SV **svp = AvARRAY(PL_comppad_name);
393 U32 seq = PL_cop_seqmax;
6b35e009 394 PERL_CONTEXT *cx;
33b8ce05 395 CV *outside;
748a9306 396
11343788
MB		 397#ifdef USE_THREADS
398 /*
399 * Special case to get lexical (and hence per-thread) @_.
400 * XXX I need to find out how to tell at parse-time whether use
401 * of @_ should refer to a lexical (from a sub) or defgv (global
402 * scope and maybe weird sub-ish things like formats). See
403 * startsub in perly.y. It's possible that @_ could be lexical
404 * (at least from subs) even in non-threaded perl.
405 */
406 if (strEQ(name, "@_"))
407 return 0; /* success. (NOT_IN_PAD indicates failure) */
408#endif /* USE_THREADS */
409
748a9306 410 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 411 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 412 if ((sv = svp[off]) &&
3280af22 413 sv != &PL_sv_undef &&
54310121 414 (!SvIVX(sv) ||
415 (seq <= SvIVX(sv) &&
416 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 417 strEQ(SvPVX(sv), name))
418 {
77ca0c92 419 if (SvIVX(sv) || SvFLAGS(sv) & SVpad_OUR)
54310121 420 return (PADOFFSET)off;
421 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 422 }
423 }
748a9306 424
33b8ce05
GS		 425 outside = CvOUTSIDE(PL_compcv);
426
427 /* Check if if we're compiling an eval'', and adjust seq to be the
428 * eval's seq number. This depends on eval'' having a non-null
429 * CvOUTSIDE() while it is being compiled. The eval'' itself is
1aff0e91
GS		 430 * identified by CvEVAL being true and CvGV being null. */
431 if (outside && CvEVAL(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 432 cx = &cxstack[cxstack_ix];
433 if (CxREALEVAL(cx))
434 seq = cx->blk_oldcop->cop_seq;
435 }
436
748a9306 437 /* See if it's in a nested scope */
2680586e 438 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0, 0);
54310121 439 if (off) {
440 /* If there is a pending local definition, this new alias must die */
441 if (pendoff)
3280af22 442 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 443 return off; /* pad_findlex returns 0 for failure...*/
54310121 444 }
11343788 445 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 446}
447
448void
864dbfa3 449Perl_pad_leavemy(pTHX_ I32 fill)
93a17b20 450{
0453d815 451 dTHR;
93a17b20 452 I32 off;
3280af22 453 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 454 SV *sv;
3280af22
NIS		 455 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
456 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
0453d815
PM		 457 if ((sv = svp[off]) && sv != &PL_sv_undef && ckWARN_d(WARN_INTERNAL))
458 Perl_warner(aTHX_ WARN_INTERNAL, "%s never introduced", SvPVX(sv));
8990e307
LW		 459 }
460 }
461 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 462 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 463 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 464 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 465 }
466}
467
468PADOFFSET
864dbfa3 469Perl_pad_alloc(pTHX_ I32 optype, U32 tmptype)
79072805 470{
11343788 471 dTHR;
79072805
LW		 472 SV *sv;
473 I32 retval;
474
3280af22 475 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 476 Perl_croak(aTHX_ "panic: pad_alloc");
3280af22 477 if (PL_pad_reset_pending)
a0d0e21e 478 pad_reset();
ed6116ce 479 if (tmptype & SVs_PADMY) {
79072805 480 do {
3280af22 481 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 482 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 483 retval = AvFILLp(PL_comppad);
79072805
LW		 484 }
485 else {
3280af22
NIS		 486 SV **names = AvARRAY(PL_comppad_name);
487 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 488 for (;;) {
489 /*
490 * "foreach" index vars temporarily become aliases to non-"my"
491 * values. Thus we must skip, not just pad values that are
492 * marked as current pad values, but also those with names.
493 */
3280af22
NIS		 494 if (++PL_padix <= names_fill &&
495 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 496 continue;
3280af22 497 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
3049cdab
SB		 498 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)) &&
499 !IS_PADGV(sv) && !IS_PADCONST(sv))
bbce6d69 500 break;
501 }
3280af22 502 retval = PL_padix;
79072805 503 }
8990e307 504 SvFLAGS(sv) |= tmptype;
3280af22 505 PL_curpad = AvARRAY(PL_comppad);
11343788 506#ifdef USE_THREADS
b900a521
JH		 507 DEBUG_X(PerlIO_printf(Perl_debug_log,
508 "0x%"UVxf" Pad 0x%"UVxf" alloc %ld for %s\n",
509 PTR2UV(thr), PTR2UV(PL_curpad),
22c35a8c 510 (long) retval, PL_op_name[optype]));
11343788 511#else
b900a521
JH		 512 DEBUG_X(PerlIO_printf(Perl_debug_log,
513 "Pad 0x%"UVxf" alloc %ld for %s\n",
514 PTR2UV(PL_curpad),
22c35a8c 515 (long) retval, PL_op_name[optype]));
11343788 516#endif /* USE_THREADS */
79072805
LW		 517 return (PADOFFSET)retval;
518}
519
520SV *
864dbfa3 521Perl_pad_sv(pTHX_ PADOFFSET po)
79072805 522{
11343788
MB		 523 dTHR;
524#ifdef USE_THREADS
b900a521 525 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 526 "0x%"UVxf" Pad 0x%"UVxf" sv %"IVdf"\n",
527 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 528#else
79072805 529 if (!po)
cea2e8a9 530 Perl_croak(aTHX_ "panic: pad_sv po");
97835f67
JH		 531 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" sv %"IVdf"\n",
532 PTR2UV(PL_curpad), (IV)po));
11343788 533#endif /* USE_THREADS */
3280af22 534 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 535}
536
537void
864dbfa3 538Perl_pad_free(pTHX_ PADOFFSET po)
79072805 539{
11343788 540 dTHR;
3280af22 541 if (!PL_curpad)
a0d0e21e 542 return;
3280af22 543 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 544 Perl_croak(aTHX_ "panic: pad_free curpad");
79072805 545 if (!po)
cea2e8a9 546 Perl_croak(aTHX_ "panic: pad_free po");
11343788 547#ifdef USE_THREADS
b900a521 548 DEBUG_X(PerlIO_printf(Perl_debug_log,
7766f137 549 "0x%"UVxf" Pad 0x%"UVxf" free %"IVdf"\n",
f1dbda3d 550 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 551#else
97835f67
JH		 552 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" free %"IVdf"\n",
553 PTR2UV(PL_curpad), (IV)po));
11343788 554#endif /* USE_THREADS */
2aa1bedc 555 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef) {
3280af22 556 SvPADTMP_off(PL_curpad[po]);
2aa1bedc
GS		 557#ifdef USE_ITHREADS
558 SvREADONLY_off(PL_curpad[po]); /* could be a freed constant */
559#endif
560 }
3280af22
NIS		 561 if ((I32)po < PL_padix)
562 PL_padix = po - 1;
79072805
LW		 563}
564
565void
864dbfa3 566Perl_pad_swipe(pTHX_ PADOFFSET po)
79072805 567{
11343788 568 dTHR;
3280af22 569 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 570 Perl_croak(aTHX_ "panic: pad_swipe curpad");
79072805 571 if (!po)
cea2e8a9 572 Perl_croak(aTHX_ "panic: pad_swipe po");
11343788 573#ifdef USE_THREADS
b900a521 574 DEBUG_X(PerlIO_printf(Perl_debug_log,
f1dbda3d
JH		 575 "0x%"UVxf" Pad 0x%"UVxf" swipe %"IVdf"\n",
576 PTR2UV(thr), PTR2UV(PL_curpad), (IV)po));
11343788 577#else
97835f67
JH		 578 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" swipe %"IVdf"\n",
579 PTR2UV(PL_curpad), (IV)po));
11343788 580#endif /* USE_THREADS */
3280af22
NIS		 581 SvPADTMP_off(PL_curpad[po]);
582 PL_curpad[po] = NEWSV(1107,0);
583 SvPADTMP_on(PL_curpad[po]);
584 if ((I32)po < PL_padix)
585 PL_padix = po - 1;
79072805
LW		 586}
587
d9bb4600
GS		 588/* XXX pad_reset() is currently disabled because it results in serious bugs.
589 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
590 * on the stack by OPs that use them, there are several ways to get an alias
591 * to a shared TARG. Such an alias will change randomly and unpredictably.
592 * We avoid doing this until we can think of a Better Way.
593 * GSAR 97-10-29 */
79072805 594void
864dbfa3 595Perl_pad_reset(pTHX)
79072805 596{
d9bb4600 597#ifdef USE_BROKEN_PAD_RESET
11343788 598 dTHR;
79072805
LW		 599 register I32 po;
600
6b88bc9c 601 if (AvARRAY(PL_comppad) != PL_curpad)
cea2e8a9 602 Perl_croak(aTHX_ "panic: pad_reset curpad");
11343788 603#ifdef USE_THREADS
b900a521
JH		 604 DEBUG_X(PerlIO_printf(Perl_debug_log,
605 "0x%"UVxf" Pad 0x%"UVxf" reset\n",
606 PTR2UV(thr), PTR2UV(PL_curpad)));
11343788 607#else
b900a521
JH		 608 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%"UVxf" reset\n",
609 PTR2UV(PL_curpad)));
11343788 610#endif /* USE_THREADS */
6b88bc9c
GS		 611 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
612 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
613 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
614 SvPADTMP_off(PL_curpad[po]);
748a9306 615 }
6b88bc9c 616 PL_padix = PL_padix_floor;
79072805 617 }
d9bb4600 618#endif
3280af22 619 PL_pad_reset_pending = FALSE;
79072805
LW		 620}
621
a863c7d1 622#ifdef USE_THREADS
54b9620d 623/* find_threadsv is not reentrant */
a863c7d1 624PADOFFSET
864dbfa3 625Perl_find_threadsv(pTHX_ const char *name)
a863c7d1
MB		 626{
627 dTHR;
628 char *p;
629 PADOFFSET key;
554b3eca 630 SV **svp;
54b9620d 631 /* We currently only handle names of a single character */
533c011a 632 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 633 if (!p)
634 return NOT_IN_PAD;
533c011a 635 key = p - PL_threadsv_names;
2d8e6c8d 636 MUTEX_LOCK(&thr->mutex);
54b9620d 637 svp = av_fetch(thr->threadsv, key, FALSE);
2d8e6c8d
GS		 638 if (svp)
639 MUTEX_UNLOCK(&thr->mutex);
640 else {
554b3eca 641 SV *sv = NEWSV(0, 0);
54b9620d 642 av_store(thr->threadsv, key, sv);
940cb80d 643 thr->threadsvp = AvARRAY(thr->threadsv);
2d8e6c8d 644 MUTEX_UNLOCK(&thr->mutex);
554b3eca
MB		 645 /*
646 * Some magic variables used to be automagically initialised
647 * in gv_fetchpv. Those which are now per-thread magicals get
648 * initialised here instead.
649 */
650 switch (*name) {
54b9620d
MB		 651 case '_':
652 break;
554b3eca
MB		 653 case ';':
654 sv_setpv(sv, "\034");
1c846c1f 655 sv_magic(sv, 0, 0, name, 1);
554b3eca 656 break;
c277df42
IZ		 657 case '&':
658 case '`':
659 case '\'':
533c011a 660 PL_sawampersand = TRUE;
a3f914c5
GS		 661 /* FALL THROUGH */
662 case '1':
663 case '2':
664 case '3':
665 case '4':
666 case '5':
667 case '6':
668 case '7':
669 case '8':
670 case '9':
c277df42 671 SvREADONLY_on(sv);
d8b5173a 672 /* FALL THROUGH */
067391ea
GS		 673
674 /* XXX %! tied to Errno.pm needs to be added here.
675 * See gv_fetchpv(). */
676 /* case '!': */
677
54b9620d 678 default:
1c846c1f 679 sv_magic(sv, 0, 0, name, 1);
554b3eca 680 }
bf49b057 681 DEBUG_S(PerlIO_printf(Perl_error_log,
54b9620d 682 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 683 sv, (*name < 32) ? "^" : "",
684 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 685 }
686 return key;
687}
688#endif /* USE_THREADS */
689
79072805
LW		 690/* Destructor */
691
692void
864dbfa3 693Perl_op_free(pTHX_ OP *o)
79072805 694{
85e6fe83 695 register OP *kid, *nextkid;
acb36ea4 696 OPCODE type;
79072805 697
5dc0d613 698 if (!o || o->op_seq == (U16)-1)
79072805
LW		 699 return;
700
7934575e
GS		 701 if (o->op_private & OPpREFCOUNTED) {
702 switch (o->op_type) {
703 case OP_LEAVESUB:
704 case OP_LEAVESUBLV:
705 case OP_LEAVEEVAL:
706 case OP_LEAVE:
707 case OP_SCOPE:
708 case OP_LEAVEWRITE:
709 OP_REFCNT_LOCK;
710 if (OpREFCNT_dec(o)) {
711 OP_REFCNT_UNLOCK;
712 return;
713 }
714 OP_REFCNT_UNLOCK;
715 break;
716 default:
717 break;
718 }
719 }
720
11343788
MB		 721 if (o->op_flags & OPf_KIDS) {
722 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 723 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 724 op_free(kid);
85e6fe83 725 }
79072805 726 }
acb36ea4
GS		 727 type = o->op_type;
728 if (type == OP_NULL)
729 type = o->op_targ;
730
731 /* COP* is not cleared by op_clear() so that we may track line
732 * numbers etc even after null() */
733 if (type == OP_NEXTSTATE || type == OP_SETSTATE || type == OP_DBSTATE)
734 cop_free((COP*)o);
735
736 op_clear(o);
737
738#ifdef PL_OP_SLAB_ALLOC
739 if ((char *) o == PL_OpPtr)
740 {
741 }
742#else
743 Safefree(o);
744#endif
745}
79072805 746
acb36ea4
GS		 747STATIC void
748S_op_clear(pTHX_ OP *o)
749{
11343788 750 switch (o->op_type) {
acb36ea4
GS		 751 case OP_NULL: /* Was holding old type, if any. */
752 case OP_ENTEREVAL: /* Was holding hints. */
753#ifdef USE_THREADS
754 case OP_THREADSV: /* Was holding index into thr->threadsv AV. */
755#endif
756 o->op_targ = 0;
a0d0e21e 757 break;
554b3eca 758#ifdef USE_THREADS
8dd3ba40
SM		 759 case OP_ENTERITER:
760 if (!(o->op_flags & OPf_SPECIAL))
761 break;
762 /* FALL THROUGH */
554b3eca 763#endif /* USE_THREADS */
a6006777 764 default:
ac4c12e7 765 if (!(o->op_flags & OPf_REF)
0b94c7bb 766 || (PL_check[o->op_type] != MEMBER_TO_FPTR(Perl_ck_ftst)))
a6006777 767 break;
768 /* FALL THROUGH */
463ee0b2 769 case OP_GVSV:
79072805 770 case OP_GV:
a6006777 771 case OP_AELEMFAST:
350de78d 772#ifdef USE_ITHREADS
971a9dd3
GS		 773 if (cPADOPo->op_padix > 0) {
774 if (PL_curpad) {
638eceb6 775 GV *gv = cGVOPo_gv;
971a9dd3
GS		 776 pad_swipe(cPADOPo->op_padix);
777 /* No GvIN_PAD_off(gv) here, because other references may still
778 * exist on the pad */
779 SvREFCNT_dec(gv);
780 }
781 cPADOPo->op_padix = 0;
782 }
350de78d 783#else
971a9dd3 784 SvREFCNT_dec(cSVOPo->op_sv);
7934575e 785 cSVOPo->op_sv = Nullsv;
350de78d 786#endif
79072805 787 break;
a1ae71d2 788 case OP_METHOD_NAMED:
79072805 789 case OP_CONST:
11343788 790 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4 791 cSVOPo->op_sv = Nullsv;
79072805 792 break;
748a9306
LW		 793 case OP_GOTO:
794 case OP_NEXT:
795 case OP_LAST:
796 case OP_REDO:
11343788 797 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 798 break;
799 /* FALL THROUGH */
a0d0e21e 800 case OP_TRANS:
acb36ea4 801 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
a0ed51b3 802 SvREFCNT_dec(cSVOPo->op_sv);
acb36ea4
GS		 803 cSVOPo->op_sv = Nullsv;
804 }
805 else {
a0ed51b3 806 Safefree(cPVOPo->op_pv);
acb36ea4
GS		 807 cPVOPo->op_pv = Nullch;
808 }
a0d0e21e
LW		 809 break;
810 case OP_SUBST:
11343788 811 op_free(cPMOPo->op_pmreplroot);
971a9dd3 812 goto clear_pmop;
748a9306 813 case OP_PUSHRE:
971a9dd3
GS		 814#ifdef USE_ITHREADS
815 if ((PADOFFSET)cPMOPo->op_pmreplroot) {
816 if (PL_curpad) {
817 GV *gv = (GV*)PL_curpad[(PADOFFSET)cPMOPo->op_pmreplroot];
818 pad_swipe((PADOFFSET)cPMOPo->op_pmreplroot);
819 /* No GvIN_PAD_off(gv) here, because other references may still
820 * exist on the pad */
821 SvREFCNT_dec(gv);
822 }
823 }
824#else
825 SvREFCNT_dec((SV*)cPMOPo->op_pmreplroot);
826#endif
827 /* FALL THROUGH */
a0d0e21e 828 case OP_MATCH:
8782bef2 829 case OP_QR:
971a9dd3
GS		 830clear_pmop:
831 cPMOPo->op_pmreplroot = Nullop;
c277df42 832 ReREFCNT_dec(cPMOPo->op_pmregexp);
acb36ea4 833 cPMOPo->op_pmregexp = (REGEXP*)NULL;
a0d0e21e 834 break;
79072805
LW		 835 }
836
743e66e6 837 if (o->op_targ > 0) {
11343788 838 pad_free(o->op_targ);
743e66e6
GS		 839 o->op_targ = 0;
840 }
79072805
LW		 841}
842
76e3520e 843STATIC void
3eb57f73
HS		 844S_cop_free(pTHX_ COP* cop)
845{
846 Safefree(cop->cop_label);
57843af0 847#ifdef USE_ITHREADS
f4dd75d9
GS		 848 Safefree(CopFILE(cop)); /* XXX share in a pvtable? */
849 Safefree(CopSTASHPV(cop)); /* XXX share in a pvtable? */
57843af0 850#else
11faa288 851 /* NOTE: COP.cop_stash is not refcounted */
cc49e20b 852 SvREFCNT_dec(CopFILEGV(cop));
57843af0 853#endif
0453d815 854 if (! specialWARN(cop->cop_warnings))
3eb57f73
HS		 855 SvREFCNT_dec(cop->cop_warnings);
856}
857
858STATIC void
cea2e8a9 859S_null(pTHX_ OP *o)
8990e307 860{
acb36ea4
GS		 861 if (o->op_type == OP_NULL)
862 return;
863 op_clear(o);
11343788
MB		 864 o->op_targ = o->op_type;
865 o->op_type = OP_NULL;
22c35a8c 866 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 867}
868
79072805
LW		 869/* Contextualizers */
870
463ee0b2 871#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 872
873OP *
864dbfa3 874Perl_linklist(pTHX_ OP *o)
79072805
LW		 875{
876 register OP *kid;
877
11343788
MB		 878 if (o->op_next)
879 return o->op_next;
79072805
LW		 880
881 /* establish postfix order */
11343788
MB		 882 if (cUNOPo->op_first) {
883 o->op_next = LINKLIST(cUNOPo->op_first);
884 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 885 if (kid->op_sibling)
886 kid->op_next = LINKLIST(kid->op_sibling);
887 else
11343788 888 kid->op_next = o;
79072805
LW		 889 }
890 }
891 else
11343788 892 o->op_next = o;
79072805 893
11343788 894 return o->op_next;
79072805
LW		 895}
896
897OP *
864dbfa3 898Perl_scalarkids(pTHX_ OP *o)
79072805
LW		 899{
900 OP *kid;
11343788
MB		 901 if (o && o->op_flags & OPf_KIDS) {
902 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 903 scalar(kid);
904 }
11343788 905 return o;
79072805
LW		 906}
907
76e3520e 908STATIC OP *
cea2e8a9 909S_scalarboolean(pTHX_ OP *o)
8990e307 910{
d008e5eb 911 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 912 dTHR;
d008e5eb 913 if (ckWARN(WARN_SYNTAX)) {
57843af0 914 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 915
d008e5eb 916 if (PL_copline != NOLINE)
57843af0 917 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 918 Perl_warner(aTHX_ WARN_SYNTAX, "Found = in conditional, should be ==");
57843af0 919 CopLINE_set(PL_curcop, oldline);
d008e5eb 920 }
a0d0e21e 921 }
11343788 922 return scalar(o);
8990e307
LW		 923}
924
925OP *
864dbfa3 926Perl_scalar(pTHX_ OP *o)
79072805
LW		 927{
928 OP *kid;
929
a0d0e21e 930 /* assumes no premature commitment */
3280af22 931 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 932 || o->op_type == OP_RETURN)
7e363e51 933 {
11343788 934 return o;
7e363e51 935 }
79072805 936
5dc0d613 937 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 938
11343788 939 switch (o->op_type) {
79072805 940 case OP_REPEAT:
11343788
MB		 941 if (o->op_private & OPpREPEAT_DOLIST)
942 null(((LISTOP*)cBINOPo->op_first)->op_first);
943 scalar(cBINOPo->op_first);
8990e307 944 break;
79072805
LW		 945 case OP_OR:
946 case OP_AND:
947 case OP_COND_EXPR:
11343788 948 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 949 scalar(kid);
79072805 950 break;
a0d0e21e 951 case OP_SPLIT:
11343788 952 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 953 if (!kPMOP->op_pmreplroot)
954 deprecate("implicit split to @_");
955 }
956 /* FALL THROUGH */
79072805 957 case OP_MATCH:
8782bef2 958 case OP_QR:
79072805
LW		 959 case OP_SUBST:
960 case OP_NULL:
8990e307 961 default:
11343788
MB		 962 if (o->op_flags & OPf_KIDS) {
963 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 964 scalar(kid);
965 }
79072805
LW		 966 break;
967 case OP_LEAVE:
968 case OP_LEAVETRY:
5dc0d613 969 kid = cLISTOPo->op_first;
54310121 970 scalar(kid);
155aba94 971 while ((kid = kid->op_sibling)) {
54310121 972 if (kid->op_sibling)
973 scalarvoid(kid);
974 else
975 scalar(kid);
976 }
3280af22 977 WITH_THR(PL_curcop = &PL_compiling);
54310121 978 break;
748a9306 979 case OP_SCOPE:
79072805 980 case OP_LINESEQ:
8990e307 981 case OP_LIST:
11343788 982 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 983 if (kid->op_sibling)
984 scalarvoid(kid);
985 else
986 scalar(kid);
987 }
3280af22 988 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 989 break;
990 }
11343788 991 return o;
79072805
LW		 992}
993
994OP *
864dbfa3 995Perl_scalarvoid(pTHX_ OP *o)
79072805
LW		 996{
997 OP *kid;
8990e307
LW		 998 char* useless = 0;
999 SV* sv;
2ebea0a1
GS		 1000 U8 want;
1001
acb36ea4
GS		 1002 if (o->op_type == OP_NEXTSTATE
1003 || o->op_type == OP_SETSTATE
1004 || o->op_type == OP_DBSTATE
1005 || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE
1006 || o->op_targ == OP_SETSTATE
1007 || o->op_targ == OP_DBSTATE)))
2ebea0a1
GS		 1008 {
1009 dTHR;
1010 PL_curcop = (COP*)o; /* for warning below */
1011 }
79072805 1012
54310121 1013 /* assumes no premature commitment */
2ebea0a1
GS		 1014 want = o->op_flags & OPf_WANT;
1015 if ((want && want != OPf_WANT_SCALAR) || PL_error_count
5dc0d613 1016 || o->op_type == OP_RETURN)
7e363e51 1017 {
11343788 1018 return o;
7e363e51 1019 }
79072805 1020
b162f9ea 1021 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1022 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1023 {
b162f9ea 1024 return scalar(o); /* As if inside SASSIGN */
7e363e51 1025 }
1c846c1f 1026
5dc0d613 1027 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 1028
11343788 1029 switch (o->op_type) {
79072805 1030 default:
22c35a8c 1031 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 1032 break;
36477c24 1033 /* FALL THROUGH */
1034 case OP_REPEAT:
11343788 1035 if (o->op_flags & OPf_STACKED)
8990e307 1036 break;
5d82c453
GA		 1037 goto func_ops;
1038 case OP_SUBSTR:
1039 if (o->op_private == 4)
1040 break;
8990e307
LW		 1041 /* FALL THROUGH */
1042 case OP_GVSV:
1043 case OP_WANTARRAY:
1044 case OP_GV:
1045 case OP_PADSV:
1046 case OP_PADAV:
1047 case OP_PADHV:
1048 case OP_PADANY:
1049 case OP_AV2ARYLEN:
8990e307 1050 case OP_REF:
a0d0e21e
LW		 1051 case OP_REFGEN:
1052 case OP_SREFGEN:
8990e307
LW		 1053 case OP_DEFINED:
1054 case OP_HEX:
1055 case OP_OCT:
1056 case OP_LENGTH:
8990e307
LW		 1057 case OP_VEC:
1058 case OP_INDEX:
1059 case OP_RINDEX:
1060 case OP_SPRINTF:
1061 case OP_AELEM:
1062 case OP_AELEMFAST:
1063 case OP_ASLICE:
8990e307
LW		 1064 case OP_HELEM:
1065 case OP_HSLICE:
1066 case OP_UNPACK:
1067 case OP_PACK:
8990e307
LW		 1068 case OP_JOIN:
1069 case OP_LSLICE:
1070 case OP_ANONLIST:
1071 case OP_ANONHASH:
1072 case OP_SORT:
1073 case OP_REVERSE:
1074 case OP_RANGE:
1075 case OP_FLIP:
1076 case OP_FLOP:
1077 case OP_CALLER:
1078 case OP_FILENO:
1079 case OP_EOF:
1080 case OP_TELL:
1081 case OP_GETSOCKNAME:
1082 case OP_GETPEERNAME:
1083 case OP_READLINK:
1084 case OP_TELLDIR:
1085 case OP_GETPPID:
1086 case OP_GETPGRP:
1087 case OP_GETPRIORITY:
1088 case OP_TIME:
1089 case OP_TMS:
1090 case OP_LOCALTIME:
1091 case OP_GMTIME:
1092 case OP_GHBYNAME:
1093 case OP_GHBYADDR:
1094 case OP_GHOSTENT:
1095 case OP_GNBYNAME:
1096 case OP_GNBYADDR:
1097 case OP_GNETENT:
1098 case OP_GPBYNAME:
1099 case OP_GPBYNUMBER:
1100 case OP_GPROTOENT:
1101 case OP_GSBYNAME:
1102 case OP_GSBYPORT:
1103 case OP_GSERVENT:
1104 case OP_GPWNAM:
1105 case OP_GPWUID:
1106 case OP_GGRNAM:
1107 case OP_GGRGID:
1108 case OP_GETLOGIN:
5d82c453 1109 func_ops:
64aac5a9 1110 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)))
22c35a8c 1111 useless = PL_op_desc[o->op_type];
8990e307
LW		 1112 break;
1113
1114 case OP_RV2GV:
1115 case OP_RV2SV:
1116 case OP_RV2AV:
1117 case OP_RV2HV:
192587c2 1118 if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) &&
11343788 1119 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 1120 useless = "a variable";
1121 break;
79072805
LW		 1122
1123 case OP_CONST:
7766f137 1124 sv = cSVOPo_sv;
7a52d87a
GS		 1125 if (cSVOPo->op_private & OPpCONST_STRICT)
1126 no_bareword_allowed(o);
1127 else {
d008e5eb
GS		 1128 dTHR;
1129 if (ckWARN(WARN_VOID)) {
1130 useless = "a constant";
1131 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
1132 useless = 0;
1133 else if (SvPOK(sv)) {
1134 if (strnEQ(SvPVX(sv), "di", 2) ||
1135 strnEQ(SvPVX(sv), "ds", 2) ||
1136 strnEQ(SvPVX(sv), "ig", 2))
1137 useless = 0;
1138 }
8990e307
LW		 1139 }
1140 }
acb36ea4 1141 null(o); /* don't execute or even remember it */
79072805
LW		 1142 break;
1143
1144 case OP_POSTINC:
11343788 1145 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 1146 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 1147 break;
1148
1149 case OP_POSTDEC:
11343788 1150 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 1151 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 1152 break;
1153
79072805
LW		 1154 case OP_OR:
1155 case OP_AND:
1156 case OP_COND_EXPR:
11343788 1157 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1158 scalarvoid(kid);
1159 break;
5aabfad6 1160
a0d0e21e 1161 case OP_NULL:
11343788 1162 if (o->op_flags & OPf_STACKED)
a0d0e21e 1163 break;
5aabfad6 1164 /* FALL THROUGH */
2ebea0a1
GS		 1165 case OP_NEXTSTATE:
1166 case OP_DBSTATE:
79072805
LW		 1167 case OP_ENTERTRY:
1168 case OP_ENTER:
11343788 1169 if (!(o->op_flags & OPf_KIDS))
79072805 1170 break;
54310121 1171 /* FALL THROUGH */
463ee0b2 1172 case OP_SCOPE:
79072805
LW		 1173 case OP_LEAVE:
1174 case OP_LEAVETRY:
a0d0e21e 1175 case OP_LEAVELOOP:
79072805 1176 case OP_LINESEQ:
79072805 1177 case OP_LIST:
11343788 1178 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1179 scalarvoid(kid);
1180 break;
c90c0ff4 1181 case OP_ENTEREVAL:
5196be3e 1182 scalarkids(o);
c90c0ff4 1183 break;
5aabfad6 1184 case OP_REQUIRE:
c90c0ff4 1185 /* all requires must return a boolean value */
5196be3e 1186 o->op_flags &= ~OPf_WANT;
d6483035
GS		 1187 /* FALL THROUGH */
1188 case OP_SCALAR:
5196be3e 1189 return scalar(o);
a0d0e21e 1190 case OP_SPLIT:
11343788 1191 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 1192 if (!kPMOP->op_pmreplroot)
1193 deprecate("implicit split to @_");
1194 }
1195 break;
79072805 1196 }
d008e5eb
GS		 1197 if (useless) {
1198 dTHR;
1199 if (ckWARN(WARN_VOID))
cea2e8a9 1200 Perl_warner(aTHX_ WARN_VOID, "Useless use of %s in void context", useless);
d008e5eb 1201 }
11343788 1202 return o;
79072805
LW		 1203}
1204
1205OP *
864dbfa3 1206Perl_listkids(pTHX_ OP *o)
79072805
LW		 1207{
1208 OP *kid;
11343788
MB		 1209 if (o && o->op_flags & OPf_KIDS) {
1210 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1211 list(kid);
1212 }
11343788 1213 return o;
79072805
LW		 1214}
1215
1216OP *
864dbfa3 1217Perl_list(pTHX_ OP *o)
79072805
LW		 1218{
1219 OP *kid;
1220
a0d0e21e 1221 /* assumes no premature commitment */
3280af22 1222 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1223 || o->op_type == OP_RETURN)
7e363e51 1224 {
11343788 1225 return o;
7e363e51 1226 }
79072805 1227
b162f9ea 1228 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1229 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1230 {
b162f9ea 1231 return o; /* As if inside SASSIGN */
7e363e51 1232 }
1c846c1f 1233
5dc0d613 1234 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1235
11343788 1236 switch (o->op_type) {
79072805
LW		 1237 case OP_FLOP:
1238 case OP_REPEAT:
11343788 1239 list(cBINOPo->op_first);
79072805
LW		 1240 break;
1241 case OP_OR:
1242 case OP_AND:
1243 case OP_COND_EXPR:
11343788 1244 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1245 list(kid);
1246 break;
1247 default:
1248 case OP_MATCH:
8782bef2 1249 case OP_QR:
79072805
LW		 1250 case OP_SUBST:
1251 case OP_NULL:
11343788 1252 if (!(o->op_flags & OPf_KIDS))
79072805 1253 break;
11343788
MB		 1254 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1255 list(cBINOPo->op_first);
1256 return gen_constant_list(o);
79072805
LW		 1257 }
1258 case OP_LIST:
11343788 1259 listkids(o);
79072805
LW		 1260 break;
1261 case OP_LEAVE:
1262 case OP_LEAVETRY:
5dc0d613 1263 kid = cLISTOPo->op_first;
54310121 1264 list(kid);
155aba94 1265 while ((kid = kid->op_sibling)) {
54310121 1266 if (kid->op_sibling)
1267 scalarvoid(kid);
1268 else
1269 list(kid);
1270 }
3280af22 1271 WITH_THR(PL_curcop = &PL_compiling);
54310121 1272 break;
748a9306 1273 case OP_SCOPE:
79072805 1274 case OP_LINESEQ:
11343788 1275 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1276 if (kid->op_sibling)
1277 scalarvoid(kid);
1278 else
1279 list(kid);
1280 }
3280af22 1281 WITH_THR(PL_curcop = &PL_compiling);
79072805 1282 break;
c90c0ff4 1283 case OP_REQUIRE:
1284 /* all requires must return a boolean value */
5196be3e
MB		 1285 o->op_flags &= ~OPf_WANT;
1286 return scalar(o);
79072805 1287 }
11343788 1288 return o;
79072805
LW		 1289}
1290
1291OP *
864dbfa3 1292Perl_scalarseq(pTHX_ OP *o)
79072805
LW		 1293{
1294 OP *kid;
1295
11343788
MB		 1296 if (o) {
1297 if (o->op_type == OP_LINESEQ ||
1298 o->op_type == OP_SCOPE ||
1299 o->op_type == OP_LEAVE ||
1300 o->op_type == OP_LEAVETRY)
463ee0b2 1301 {
0f15f207 1302 dTHR;
11343788 1303 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1304 if (kid->op_sibling) {
463ee0b2 1305 scalarvoid(kid);
ed6116ce 1306 }
463ee0b2 1307 }
3280af22 1308 PL_curcop = &PL_compiling;
79072805 1309 }
11343788 1310 o->op_flags &= ~OPf_PARENS;
3280af22 1311 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1312 o->op_flags |= OPf_PARENS;
79072805 1313 }
8990e307 1314 else
11343788
MB		 1315 o = newOP(OP_STUB, 0);
1316 return o;
79072805
LW		 1317}
1318
76e3520e 1319STATIC OP *
cea2e8a9 1320S_modkids(pTHX_ OP *o, I32 type)
79072805
LW		 1321{
1322 OP *kid;
11343788
MB		 1323 if (o && o->op_flags & OPf_KIDS) {
1324 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1325 mod(kid, type);
79072805 1326 }
11343788 1327 return o;
79072805
LW		 1328}
1329
79072805 1330OP *
864dbfa3 1331Perl_mod(pTHX_ OP *o, I32 type)
79072805 1332{
11343788 1333 dTHR;
79072805 1334 OP *kid;
2d8e6c8d 1335 STRLEN n_a;
79072805 1336
3280af22 1337 if (!o || PL_error_count)
11343788 1338 return o;
79072805 1339
b162f9ea 1340 if ((o->op_private & OPpTARGET_MY)
7e363e51
GS		 1341 && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */
1342 {
b162f9ea 1343 return o;
7e363e51 1344 }
1c846c1f 1345
11343788 1346 switch (o->op_type) {
68dc0745 1347 case OP_UNDEF:
3280af22 1348 PL_modcount++;
5dc0d613 1349 return o;
a0d0e21e 1350 case OP_CONST:
11343788 1351 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1352 goto nomod;
3280af22 1353 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
7766f137 1354 PL_compiling.cop_arybase = (I32)SvIV(cSVOPx(PL_eval_start)->op_sv);
3280af22 1355 PL_eval_start = 0;
a0d0e21e
LW		 1356 }
1357 else if (!type) {
3280af22
NIS		 1358 SAVEI32(PL_compiling.cop_arybase);
1359 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1360 }
1361 else if (type == OP_REFGEN)
1362 goto nomod;
1363 else
cea2e8a9 1364 Perl_croak(aTHX_ "That use of $[ is unsupported");
a0d0e21e 1365 break;
5f05dabc 1366 case OP_STUB:
5196be3e 1367 if (o->op_flags & OPf_PARENS)
5f05dabc 1368 break;
1369 goto nomod;
a0d0e21e
LW		 1370 case OP_ENTERSUB:
1371 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1372 !(o->op_flags & OPf_STACKED)) {
1373 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1374 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1375 assert(cUNOPo->op_first->op_type == OP_NULL);
1376 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1377 break;
1378 }
cd06dffe
GS		 1379 else { /* lvalue subroutine call */
1380 o->op_private |= OPpLVAL_INTRO;
4978d6d9 1381 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) {
cd06dffe
GS		 1382 /* Backward compatibility mode: */
1383 o->op_private |= OPpENTERSUB_INARGS;
1384 break;
1385 }
1386 else { /* Compile-time error message: */
1387 OP *kid = cUNOPo->op_first;
1388 CV *cv;
1389 OP *okid;
1390
1391 if (kid->op_type == OP_PUSHMARK)
1392 goto skip_kids;
1393 if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST)
1394 Perl_croak(aTHX_
1395 "panic: unexpected lvalue entersub "
1396 "args: type/targ %ld:%ld",
1397 (long)kid->op_type,kid->op_targ);
1398 kid = kLISTOP->op_first;
1399 skip_kids:
1400 while (kid->op_sibling)
1401 kid = kid->op_sibling;
1402 if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) {
1403 /* Indirect call */
1404 if (kid->op_type == OP_METHOD_NAMED
1405 || kid->op_type == OP_METHOD)
1406 {
87d7fd28 1407 UNOP *newop;
cd06dffe
GS		 1408
1409 if (kid->op_sibling || kid->op_next != kid) {
1410 yyerror("panic: unexpected optree near method call");
1411 break;
1412 }
1413
87d7fd28 1414 NewOp(1101, newop, 1, UNOP);
349fd7b7
GS		 1415 newop->op_type = OP_RV2CV;
1416 newop->op_ppaddr = PL_ppaddr[OP_RV2CV];
87d7fd28
GS		 1417 newop->op_first = Nullop;
1418 newop->op_next = (OP*)newop;
1419 kid->op_sibling = (OP*)newop;
349fd7b7 1420 newop->op_private |= OPpLVAL_INTRO;
cd06dffe
GS		 1421 break;
1422 }
1c846c1f 1423
cd06dffe
GS		 1424 if (kid->op_type != OP_RV2CV)
1425 Perl_croak(aTHX_
1426 "panic: unexpected lvalue entersub "
1427 "entry via type/targ %ld:%ld",
1428 (long)kid->op_type,kid->op_targ);
1429 kid->op_private |= OPpLVAL_INTRO;
1430 break; /* Postpone until runtime */
1431 }
1432
1433 okid = kid;
1434 kid = kUNOP->op_first;
1435 if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV)
1436 kid = kUNOP->op_first;
1437 if (kid->op_type == OP_NULL)
1438 Perl_croak(aTHX_
1439 "Unexpected constant lvalue entersub "
1440 "entry via type/targ %ld:%ld",
1441 (long)kid->op_type,kid->op_targ);
1442 if (kid->op_type != OP_GV) {
1443 /* Restore RV2CV to check lvalueness */
1444 restore_2cv:
1445 if (kid->op_next && kid->op_next != kid) { /* Happens? */
1446 okid->op_next = kid->op_next;
1447 kid->op_next = okid;
1448 }
1449 else
1450 okid->op_next = Nullop;
1451 okid->op_type = OP_RV2CV;
1452 okid->op_targ = 0;
1453 okid->op_ppaddr = PL_ppaddr[OP_RV2CV];
1454 okid->op_private |= OPpLVAL_INTRO;
1455 break;
1456 }
1457
638eceb6 1458 cv = GvCV(kGVOP_gv);
1c846c1f 1459 if (!cv)
cd06dffe
GS		 1460 goto restore_2cv;
1461 if (CvLVALUE(cv))
1462 break;
1463 }
1464 }
79072805
LW		 1465 /* FALL THROUGH */
1466 default:
a0d0e21e
LW		 1467 nomod:
1468 /* grep, foreach, subcalls, refgen */
1469 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1470 break;
cea2e8a9 1471 yyerror(Perl_form(aTHX_ "Can't modify %s in %s",
638bc118 1472 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
cd06dffe
GS		 1473 ? "do block"
1474 : (o->op_type == OP_ENTERSUB
1475 ? "non-lvalue subroutine call"
1476 : PL_op_desc[o->op_type])),
22c35a8c 1477 type ? PL_op_desc[type] : "local"));
11343788 1478 return o;
79072805 1479
a0d0e21e
LW		 1480 case OP_PREINC:
1481 case OP_PREDEC:
1482 case OP_POW:
1483 case OP_MULTIPLY:
1484 case OP_DIVIDE:
1485 case OP_MODULO:
1486 case OP_REPEAT:
1487 case OP_ADD:
1488 case OP_SUBTRACT:
1489 case OP_CONCAT:
1490 case OP_LEFT_SHIFT:
1491 case OP_RIGHT_SHIFT:
1492 case OP_BIT_AND:
1493 case OP_BIT_XOR:
1494 case OP_BIT_OR:
1495 case OP_I_MULTIPLY:
1496 case OP_I_DIVIDE:
1497 case OP_I_MODULO:
1498 case OP_I_ADD:
1499 case OP_I_SUBTRACT:
11343788 1500 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1501 goto nomod;
3280af22 1502 PL_modcount++;
a0d0e21e
LW		 1503 break;
1504
79072805 1505 case OP_COND_EXPR:
11343788 1506 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1507 mod(kid, type);
79072805
LW		 1508 break;
1509
1510 case OP_RV2AV:
1511 case OP_RV2HV:
93af7a87 1512 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1513 Perl_croak(aTHX_ "Can't localize through a reference");
11343788 1514 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1515 PL_modcount = 10000;
11343788 1516 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1517 }
1518 /* FALL THROUGH */
79072805 1519 case OP_RV2GV:
5dc0d613 1520 if (scalar_mod_type(o, type))
3fe9a6f1 1521 goto nomod;
11343788 1522 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1523 /* FALL THROUGH */
1524 case OP_AASSIGN:
1525 case OP_ASLICE:
1526 case OP_HSLICE:
93a17b20
LW		 1527 case OP_NEXTSTATE:
1528 case OP_DBSTATE:
a0d0e21e
LW		 1529 case OP_REFGEN:
1530 case OP_CHOMP:
3280af22 1531 PL_modcount = 10000;
79072805 1532 break;
463ee0b2 1533 case OP_RV2SV:
11343788 1534 if (!type && cUNOPo->op_first->op_type != OP_GV)
cea2e8a9 1535 Perl_croak(aTHX_ "Can't localize through a reference");
aeea060c 1536 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1537 /* FALL THROUGH */
79072805 1538 case OP_GV:
463ee0b2 1539 case OP_AV2ARYLEN:
3280af22 1540 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1541 case OP_SASSIGN:
bf4b1e52
GS		 1542 case OP_ANDASSIGN:
1543 case OP_ORASSIGN:
8990e307 1544 case OP_AELEMFAST:
3280af22 1545 PL_modcount++;
8990e307
LW		 1546 break;
1547
748a9306
LW		 1548 case OP_PADAV:
1549 case OP_PADHV:
3280af22 1550 PL_modcount = 10000;
5196be3e
MB		 1551 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1552 return o; /* Treat \(@foo) like ordinary list. */
1553 if (scalar_mod_type(o, type))
3fe9a6f1 1554 goto nomod;
748a9306
LW		 1555 /* FALL THROUGH */
1556 case OP_PADSV:
3280af22 1557 PL_modcount++;
748a9306 1558 if (!type)
cea2e8a9 1559 Perl_croak(aTHX_ "Can't localize lexical variable %s",
2d8e6c8d 1560 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), n_a));
463ee0b2
LW		 1561 break;
1562
554b3eca 1563#ifdef USE_THREADS
2faa37cc 1564 case OP_THREADSV:
533c011a 1565 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1566 break;
1567#endif /* USE_THREADS */
1568
748a9306
LW		 1569 case OP_PUSHMARK:
1570 break;
a0d0e21e 1571
69969c6f
SB		 1572 case OP_KEYS:
1573 if (type != OP_SASSIGN)
1574 goto nomod;
5d82c453
GA		 1575 goto lvalue_func;
1576 case OP_SUBSTR:
1577 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1578 goto nomod;
5f05dabc 1579 /* FALL THROUGH */
a0d0e21e 1580 case OP_POS:
463ee0b2 1581 case OP_VEC:
5d82c453 1582 lvalue_func:
11343788
MB		 1583 pad_free(o->op_targ);
1584 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1585 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1586 if (o->op_flags & OPf_KIDS)
1587 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1588 break;
a0d0e21e 1589
463ee0b2
LW		 1590 case OP_AELEM:
1591 case OP_HELEM:
11343788 1592 ref(cBINOPo->op_first, o->op_type);
68dc0745 1593 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1594 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1595 o->op_private |= OPpLVAL_DEFER;
3280af22 1596 PL_modcount++;
463ee0b2
LW		 1597 break;
1598
1599 case OP_SCOPE:
1600 case OP_LEAVE:
1601 case OP_ENTER:
11343788
MB		 1602 if (o->op_flags & OPf_KIDS)
1603 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1604 break;
1605
1606 case OP_NULL:
638bc118
GS		 1607 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1608 goto nomod;
1609 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1610 break;
11343788
MB		 1611 if (o->op_targ != OP_LIST) {
1612 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1613 break;
1614 }
1615 /* FALL THROUGH */
463ee0b2 1616 case OP_LIST:
11343788 1617 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1618 mod(kid, type);
1619 break;
1620 }
11343788 1621 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1622
1623 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1624 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1625 else if (!type) {
11343788
MB		 1626 o->op_private |= OPpLVAL_INTRO;
1627 o->op_flags &= ~OPf_SPECIAL;
3280af22 1628 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1629 }
a0d0e21e 1630 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1631 o->op_flags |= OPf_REF;
1632 return o;
463ee0b2
LW		 1633}
1634
864dbfa3 1635STATIC bool
cea2e8a9 1636S_scalar_mod_type(pTHX_ OP *o, I32 type)
3fe9a6f1 1637{
1638 switch (type) {
1639 case OP_SASSIGN:
5196be3e 1640 if (o->op_type == OP_RV2GV)
3fe9a6f1 1641 return FALSE;
1642 /* FALL THROUGH */
1643 case OP_PREINC:
1644 case OP_PREDEC:
1645 case OP_POSTINC:
1646 case OP_POSTDEC:
1647 case OP_I_PREINC:
1648 case OP_I_PREDEC:
1649 case OP_I_POSTINC:
1650 case OP_I_POSTDEC:
1651 case OP_POW:
1652 case OP_MULTIPLY:
1653 case OP_DIVIDE:
1654 case OP_MODULO:
1655 case OP_REPEAT:
1656 case OP_ADD:
1657 case OP_SUBTRACT:
1658 case OP_I_MULTIPLY:
1659 case OP_I_DIVIDE:
1660 case OP_I_MODULO:
1661 case OP_I_ADD:
1662 case OP_I_SUBTRACT:
1663 case OP_LEFT_SHIFT:
1664 case OP_RIGHT_SHIFT:
1665 case OP_BIT_AND:
1666 case OP_BIT_XOR:
1667 case OP_BIT_OR:
1668 case OP_CONCAT:
1669 case OP_SUBST:
1670 case OP_TRANS:
49e9fbe6
GS		 1671 case OP_READ:
1672 case OP_SYSREAD:
1673 case OP_RECV:
bf4b1e52
GS		 1674 case OP_ANDASSIGN:
1675 case OP_ORASSIGN:
3fe9a6f1 1676 return TRUE;
1677 default:
1678 return FALSE;
1679 }
1680}
1681
35cd451c 1682STATIC bool
cea2e8a9 1683S_is_handle_constructor(pTHX_ OP *o, I32 argnum)
35cd451c
GS		 1684{
1685 switch (o->op_type) {
1686 case OP_PIPE_OP:
1687 case OP_SOCKPAIR:
1688 if (argnum == 2)
1689 return TRUE;
1690 /* FALL THROUGH */
1691 case OP_SYSOPEN:
1692 case OP_OPEN:
ded8aa31 1693 case OP_SELECT: /* XXX c.f. SelectSaver.pm */
35cd451c
GS		 1694 case OP_SOCKET:
1695 case OP_OPEN_DIR:
1696 case OP_ACCEPT:
1697 if (argnum == 1)
1698 return TRUE;
1699 /* FALL THROUGH */
1700 default:
1701 return FALSE;
1702 }
1703}
1704
463ee0b2 1705OP *
864dbfa3 1706Perl_refkids(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1707{
1708 OP *kid;
11343788
MB		 1709 if (o && o->op_flags & OPf_KIDS) {
1710 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1711 ref(kid, type);
1712 }
11343788 1713 return o;
463ee0b2
LW		 1714}
1715
1716OP *
864dbfa3 1717Perl_ref(pTHX_ OP *o, I32 type)
463ee0b2
LW		 1718{
1719 OP *kid;
463ee0b2 1720
3280af22 1721 if (!o || PL_error_count)
11343788 1722 return o;
463ee0b2 1723
11343788 1724 switch (o->op_type) {
a0d0e21e 1725 case OP_ENTERSUB:
afebc493 1726 if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1727 !(o->op_flags & OPf_STACKED)) {
1728 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1729 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1730 assert(cUNOPo->op_first->op_type == OP_NULL);
1731 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1732 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1733 }
1734 break;
aeea060c 1735
463ee0b2 1736 case OP_COND_EXPR:
11343788 1737 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1738 ref(kid, type);
1739 break;
8990e307 1740 case OP_RV2SV:
35cd451c
GS		 1741 if (type == OP_DEFINED)
1742 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1743 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1744 /* FALL THROUGH */
1745 case OP_PADSV:
5f05dabc 1746 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1747 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1748 : type == OP_RV2HV ? OPpDEREF_HV
1749 : OPpDEREF_SV);
11343788 1750 o->op_flags |= OPf_MOD;
a0d0e21e 1751 }
8990e307 1752 break;
1c846c1f 1753
2faa37cc 1754 case OP_THREADSV:
a863c7d1
MB		 1755 o->op_flags |= OPf_MOD; /* XXX ??? */
1756 break;
1757
463ee0b2
LW		 1758 case OP_RV2AV:
1759 case OP_RV2HV:
aeea060c 1760 o->op_flags |= OPf_REF;
8990e307 1761 /* FALL THROUGH */
463ee0b2 1762 case OP_RV2GV:
35cd451c
GS		 1763 if (type == OP_DEFINED)
1764 o->op_flags |= OPf_SPECIAL; /* don't create GV */
11343788 1765 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1766 break;
8990e307 1767
463ee0b2
LW		 1768 case OP_PADAV:
1769 case OP_PADHV:
aeea060c 1770 o->op_flags |= OPf_REF;
79072805 1771 break;
aeea060c 1772
8990e307 1773 case OP_SCALAR:
79072805 1774 case OP_NULL:
11343788 1775 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1776 break;
11343788 1777 ref(cBINOPo->op_first, type);
79072805
LW		 1778 break;
1779 case OP_AELEM:
1780 case OP_HELEM:
11343788 1781 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1782 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1783 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1784 : type == OP_RV2HV ? OPpDEREF_HV
1785 : OPpDEREF_SV);
11343788 1786 o->op_flags |= OPf_MOD;
8990e307 1787 }
79072805
LW		 1788 break;
1789
463ee0b2 1790 case OP_SCOPE:
79072805
LW		 1791 case OP_LEAVE:
1792 case OP_ENTER:
8990e307 1793 case OP_LIST:
11343788 1794 if (!(o->op_flags & OPf_KIDS))
79072805 1795 break;
11343788 1796 ref(cLISTOPo->op_last, type);
79072805 1797 break;
a0d0e21e
LW		 1798 default:
1799 break;
79072805 1800 }
11343788 1801 return scalar(o);
8990e307 1802
79072805
LW		 1803}
1804
09bef843
SB		 1805STATIC OP *
1806S_dup_attrlist(pTHX_ OP *o)
1807{
1808 OP *rop = Nullop;
1809
1810 /* An attrlist is either a simple OP_CONST or an OP_LIST with kids,
1811 * where the first kid is OP_PUSHMARK and the remaining ones
1812 * are OP_CONST. We need to push the OP_CONST values.
1813 */
1814 if (o->op_type == OP_CONST)
1815 rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc(cSVOPo->op_sv));
1816 else {
1817 assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS));
1818 for (o = cLISTOPo->op_first; o; o=o->op_sibling) {
1819 if (o->op_type == OP_CONST)
1820 rop = append_elem(OP_LIST, rop,
1821 newSVOP(OP_CONST, o->op_flags,
1822 SvREFCNT_inc(cSVOPo->op_sv)));
1823 }
1824 }
1825 return rop;
1826}
1827
1828STATIC void
1829S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs)
1830{
09bef843
SB		 1831 SV *stashsv;
1832
1833 /* fake up C<use attributes $pkg,$rv,@attrs> */
1834 ENTER; /* need to protect against side-effects of 'use' */
1835 SAVEINT(PL_expect);
1836 if (stash && HvNAME(stash))
1837 stashsv = newSVpv(HvNAME(stash), 0);
1838 else
1839 stashsv = &PL_sv_no;
e4783991 1840
09bef843 1841#define ATTRSMODULE "attributes"
e4783991
GS		 1842
1843 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1844 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1845 Nullsv,
1846 prepend_elem(OP_LIST,
1847 newSVOP(OP_CONST, 0, stashsv),
1848 prepend_elem(OP_LIST,
1849 newSVOP(OP_CONST, 0,
1850 newRV(target)),
1851 dup_attrlist(attrs))));
09bef843
SB		 1852 LEAVE;
1853}
1854
be3174d2
GS		 1855void
1856Perl_apply_attrs_string(pTHX_ char *stashpv, CV *cv,
1857 char *attrstr, STRLEN len)
1858{
1859 OP *attrs = Nullop;
1860
1861 if (!len) {
1862 len = strlen(attrstr);
1863 }
1864
1865 while (len) {
1866 for (; isSPACE(*attrstr) && len; --len, ++attrstr) ;
1867 if (len) {
1868 char *sstr = attrstr;
1869 for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ;
1870 attrs = append_elem(OP_LIST, attrs,
1871 newSVOP(OP_CONST, 0,
1872 newSVpvn(sstr, attrstr-sstr)));
1873 }
1874 }
1875
1876 Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS,
1877 newSVpvn(ATTRSMODULE, sizeof(ATTRSMODULE)-1),
1878 Nullsv, prepend_elem(OP_LIST,
1879 newSVOP(OP_CONST, 0, newSVpv(stashpv,0)),
1880 prepend_elem(OP_LIST,
1881 newSVOP(OP_CONST, 0,
1882 newRV((SV*)cv)),
1883 attrs)));
1884}
1885
09bef843
SB		 1886STATIC OP *
1887S_my_kid(pTHX_ OP *o, OP *attrs)
93a17b20
LW		 1888{
1889 OP *kid;
93a17b20
LW		 1890 I32 type;
1891
3280af22 1892 if (!o || PL_error_count)
11343788 1893 return o;
93a17b20 1894
11343788 1895 type = o->op_type;
93a17b20 1896 if (type == OP_LIST) {
11343788 1897 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
09bef843 1898 my_kid(kid, attrs);
dab48698 1899 } else if (type == OP_UNDEF) {
7766148a 1900 return o;
77ca0c92
LW		 1901 } else if (type == OP_RV2SV || /* "our" declaration */
1902 type == OP_RV2AV ||
1903 type == OP_RV2HV) { /* XXX does this let anything illegal in? */
192587c2 1904 o->op_private |= OPpOUR_INTRO;
77ca0c92 1905 return o;
dab48698 1906 } else if (type != OP_PADSV &&
93a17b20
LW		 1907 type != OP_PADAV &&
1908 type != OP_PADHV &&
1909 type != OP_PUSHMARK)
1910 {
eb64745e
GS		 1911 yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"",
1912 PL_op_desc[o->op_type],
1913 PL_in_my == KEY_our ? "our" : "my"));
11343788 1914 return o;
93a17b20 1915 }
09bef843
SB		 1916 else if (attrs && type != OP_PUSHMARK) {
1917 HV *stash;
1918 SV *padsv;
1919 SV **namesvp;
1920
eb64745e
GS		 1921 PL_in_my = FALSE;
1922 PL_in_my_stash = Nullhv;
1923
09bef843
SB		 1924 /* check for C<my Dog $spot> when deciding package */
1925 namesvp = av_fetch(PL_comppad_name, o->op_targ, FALSE);
1926 if (namesvp && *namesvp && SvOBJECT(*namesvp) && HvNAME(SvSTASH(*namesvp)))
1927 stash = SvSTASH(*namesvp);
1928 else
1929 stash = PL_curstash;
1930 padsv = PAD_SV(o->op_targ);
1931 apply_attrs(stash, padsv, attrs);
1932 }
11343788
MB		 1933 o->op_flags |= OPf_MOD;
1934 o->op_private |= OPpLVAL_INTRO;
1935 return o;
93a17b20
LW		 1936}
1937
1938OP *
09bef843
SB		 1939Perl_my_attrs(pTHX_ OP *o, OP *attrs)
1940{
1941 if (o->op_flags & OPf_PARENS)
1942 list(o);
09bef843
SB		 1943 if (attrs)
1944 SAVEFREEOP(attrs);
eb64745e
GS		 1945 o = my_kid(o, attrs);
1946 PL_in_my = FALSE;
1947 PL_in_my_stash = Nullhv;
1948 return o;
09bef843
SB		 1949}
1950
1951OP *
1952Perl_my(pTHX_ OP *o)
1953{
1954 return my_kid(o, Nullop);
1955}
1956
1957OP *
864dbfa3 1958Perl_sawparens(pTHX_ OP *o)
79072805
LW		 1959{
1960 if (o)
1961 o->op_flags |= OPf_PARENS;
1962 return o;
1963}
1964
1965OP *
864dbfa3 1966Perl_bind_match(pTHX_ I32 type, OP *left, OP *right)
79072805 1967{
d008e5eb 1968 dTHR;
11343788 1969 OP *o;
79072805 1970
e476b1b5 1971 if (ckWARN(WARN_MISC) &&
599cee73
PM		 1972 (left->op_type == OP_RV2AV ||
1973 left->op_type == OP_RV2HV ||
1974 left->op_type == OP_PADAV ||
1975 left->op_type == OP_PADHV)) {
22c35a8c 1976 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1977 right->op_type == OP_TRANS)
1978 ? right->op_type : OP_MATCH];
dff6d3cd
GS		 1979 const char *sample = ((left->op_type == OP_RV2AV ||
1980 left->op_type == OP_PADAV)
1981 ? "@array" : "%hash");
e476b1b5 1982 Perl_warner(aTHX_ WARN_MISC,
1c846c1f 1983 "Applying %s to %s will act on scalar(%s)",
599cee73 1984 desc, sample, sample);
2ae324a7 1985 }
1986
de4bf5b3
MG		 1987 if (!(right->op_flags & OPf_STACKED) &&
1988 (right->op_type == OP_MATCH ||
79072805 1989 right->op_type == OP_SUBST ||
de4bf5b3 1990 right->op_type == OP_TRANS)) {
79072805 1991 right->op_flags |= OPf_STACKED;
d897a58d
MG		 1992 if (right->op_type != OP_MATCH &&
1993 ! (right->op_type == OP_TRANS &&
1994 right->op_private & OPpTRANS_IDENTICAL))
463ee0b2 1995 left = mod(left, right->op_type);
79072805 1996 if (right->op_type == OP_TRANS)
11343788 1997 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1998 else
11343788 1999 o = prepend_elem(right->op_type, scalar(left), right);
79072805 2000 if (type == OP_NOT)
11343788
MB		 2001 return newUNOP(OP_NOT, 0, scalar(o));
2002 return o;
79072805
LW		 2003 }
2004 else
2005 return bind_match(type, left,
2006 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
2007}
2008
2009OP *
864dbfa3 2010Perl_invert(pTHX_ OP *o)
79072805 2011{
11343788
MB		 2012 if (!o)
2013 return o;
79072805 2014 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 2015 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 2016}
2017
2018OP *
864dbfa3 2019Perl_scope(pTHX_ OP *o)
79072805
LW		 2020{
2021 if (o) {
3280af22 2022 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 2023 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
2024 o->op_type = OP_LEAVE;
22c35a8c 2025 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 2026 }
2027 else {
2028 if (o->op_type == OP_LINESEQ) {
2029 OP *kid;
2030 o->op_type = OP_SCOPE;
22c35a8c 2031 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
c3ed7a6a
GS		 2032 kid = ((LISTOP*)o)->op_first;
2033 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)
2034 null(kid);
463ee0b2
LW		 2035 }
2036 else
748a9306 2037 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 2038 }
79072805
LW		 2039 }
2040 return o;
2041}
2042
b3ac6de7 2043void
864dbfa3 2044Perl_save_hints(pTHX)
b3ac6de7 2045{
3280af22
NIS		 2046 SAVEI32(PL_hints);
2047 SAVESPTR(GvHV(PL_hintgv));
2048 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
2049 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 2050}
2051
a0d0e21e 2052int
864dbfa3 2053Perl_block_start(pTHX_ int full)
79072805 2054{
11343788 2055 dTHR;
3280af22 2056 int retval = PL_savestack_ix;
b3ac6de7 2057
3280af22 2058 SAVEI32(PL_comppad_name_floor);
43d4d5c6
GS		 2059 PL_comppad_name_floor = AvFILLp(PL_comppad_name);
2060 if (full)
2061 PL_comppad_name_fill = PL_comppad_name_floor;
2062 if (PL_comppad_name_floor < 0)
2063 PL_comppad_name_floor = 0;
3280af22
NIS		 2064 SAVEI32(PL_min_intro_pending);
2065 SAVEI32(PL_max_intro_pending);
2066 PL_min_intro_pending = 0;
2067 SAVEI32(PL_comppad_name_fill);
2068 SAVEI32(PL_padix_floor);
2069 PL_padix_floor = PL_padix;
2070 PL_pad_reset_pending = FALSE;
b3ac6de7 2071 SAVEHINTS();
3280af22 2072 PL_hints &= ~HINT_BLOCK_SCOPE;
1c846c1f 2073 SAVESPTR(PL_compiling.cop_warnings);
0453d815 2074 if (! specialWARN(PL_compiling.cop_warnings)) {
599cee73
PM		 2075 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
2076 SAVEFREESV(PL_compiling.cop_warnings) ;
2077 }
a0d0e21e
LW		 2078 return retval;
2079}
2080
2081OP*
864dbfa3 2082Perl_block_end(pTHX_ I32 floor, OP *seq)
a0d0e21e 2083{
11343788 2084 dTHR;
3280af22 2085 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 2086 OP* retval = scalarseq(seq);
a0d0e21e 2087 LEAVE_SCOPE(floor);
3280af22 2088 PL_pad_reset_pending = FALSE;
e24b16f9 2089 PL_compiling.op_private = PL_hints;
a0d0e21e 2090 if (needblockscope)
3280af22
NIS		 2091 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
2092 pad_leavemy(PL_comppad_name_fill);
2093 PL_cop_seqmax++;
a0d0e21e
LW		 2094 return retval;
2095}
2096
76e3520e 2097STATIC OP *
cea2e8a9 2098S_newDEFSVOP(pTHX)
54b9620d
MB		 2099{
2100#ifdef USE_THREADS
2101 OP *o = newOP(OP_THREADSV, 0);
2102 o->op_targ = find_threadsv("_");
2103 return o;
2104#else
3280af22 2105 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 2106#endif /* USE_THREADS */
2107}
2108
a0d0e21e 2109void
864dbfa3 2110Perl_newPROG(pTHX_ OP *o)
a0d0e21e 2111{
11343788 2112 dTHR;
3280af22 2113 if (PL_in_eval) {
b295d113
TH		 2114 if (PL_eval_root)
2115 return;
faef0170
HS		 2116 PL_eval_root = newUNOP(OP_LEAVEEVAL,
2117 ((PL_in_eval & EVAL_KEEPERR)
2118 ? OPf_SPECIAL : 0), o);
3280af22 2119 PL_eval_start = linklist(PL_eval_root);
7934575e
GS		 2120 PL_eval_root->op_private |= OPpREFCOUNTED;
2121 OpREFCNT_set(PL_eval_root, 1);
3280af22
NIS		 2122 PL_eval_root->op_next = 0;
2123 peep(PL_eval_start);
a0d0e21e
LW		 2124 }
2125 else {
5dc0d613 2126 if (!o)
a0d0e21e 2127 return;
3280af22
NIS		 2128 PL_main_root = scope(sawparens(scalarvoid(o)));
2129 PL_curcop = &PL_compiling;
2130 PL_main_start = LINKLIST(PL_main_root);
7934575e
GS		 2131 PL_main_root->op_private |= OPpREFCOUNTED;
2132 OpREFCNT_set(PL_main_root, 1);
3280af22
NIS		 2133 PL_main_root->op_next = 0;
2134 peep(PL_main_start);
2135 PL_compcv = 0;
3841441e 2136
4fdae800 2137 /* Register with debugger */
84902520 2138 if (PERLDB_INTER) {
864dbfa3 2139 CV *cv = get_cv("DB::postponed", FALSE);
3841441e
CS		 2140 if (cv) {
2141 dSP;
924508f0 2142 PUSHMARK(SP);
cc49e20b 2143 XPUSHs((SV*)CopFILEGV(&PL_compiling));
3841441e 2144 PUTBACK;
864dbfa3 2145 call_sv((SV*)cv, G_DISCARD);
3841441e
CS		 2146 }
2147 }
79072805 2148 }
79072805
LW		 2149}
2150
2151OP *
864dbfa3 2152Perl_localize(pTHX_ OP *o, I32 lex)
79072805
LW		 2153{
2154 if (o->op_flags & OPf_PARENS)
2155 list(o);
8990e307 2156 else {
d008e5eb 2157 dTHR;
599cee73 2158 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 2159 char *s;
834a4ddd 2160 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 2161 if (*s == ';' || *s == '=')
eb64745e
GS		 2162 Perl_warner(aTHX_ WARN_PARENTHESIS,
2163 "Parentheses missing around \"%s\" list",
2164 lex ? (PL_in_my == KEY_our ? "our" : "my") : "local");
8990e307
LW		 2165 }
2166 }
93a17b20 2167 if (lex)
eb64745e 2168 o = my(o);
93a17b20 2169 else
eb64745e
GS		 2170 o = mod(o, OP_NULL); /* a bit kludgey */
2171 PL_in_my = FALSE;
2172 PL_in_my_stash = Nullhv;
2173 return o;
79072805
LW		 2174}
2175
2176OP *
864dbfa3 2177Perl_jmaybe(pTHX_ OP *o)
79072805
LW		 2178{
2179 if (o->op_type == OP_LIST) {
554b3eca
MB		 2180 OP *o2;
2181#ifdef USE_THREADS
2faa37cc 2182 o2 = newOP(OP_THREADSV, 0);
54b9620d 2183 o2->op_targ = find_threadsv(";");
554b3eca
MB		 2184#else
2185 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
2186#endif /* USE_THREADS */
2187 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 2188 }
2189 return o;
2190}
2191
2192OP *
864dbfa3 2193Perl_fold_constants(pTHX_ register OP *o)
79072805 2194{
11343788 2195 dTHR;
79072805
LW		 2196 register OP *curop;
2197 I32 type = o->op_type;
748a9306 2198 SV *sv;
79072805 2199
22c35a8c 2200 if (PL_opargs[type] & OA_RETSCALAR)
79072805 2201 scalar(o);
b162f9ea 2202 if (PL_opargs[type] & OA_TARGET && !o->op_targ)
ed6116ce 2203 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 2204
eac055e9
GS		 2205 /* integerize op, unless it happens to be C<-foo>.
2206 * XXX should pp_i_negate() do magic string negation instead? */
2207 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER)
2208 && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST
2209 && (cUNOPo->op_first->op_private & OPpCONST_BARE)))
2210 {
22c35a8c 2211 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
eac055e9 2212 }
85e6fe83 2213
22c35a8c 2214 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 2215 goto nope;
2216
de939608 2217 switch (type) {
7a52d87a
GS		 2218 case OP_NEGATE:
2219 /* XXX might want a ck_negate() for this */
2220 cUNOPo->op_first->op_private &= ~OPpCONST_STRICT;
2221 break;
de939608
CS		 2222 case OP_SPRINTF:
2223 case OP_UCFIRST:
2224 case OP_LCFIRST:
2225 case OP_UC:
2226 case OP_LC:
69dcf70c
MB		 2227 case OP_SLT:
2228 case OP_SGT:
2229 case OP_SLE:
2230 case OP_SGE:
2231 case OP_SCMP:
2232
de939608
CS		 2233 if (o->op_private & OPpLOCALE)
2234 goto nope;
2235 }
2236
3280af22 2237 if (PL_error_count)
a0d0e21e
LW		 2238 goto nope; /* Don't try to run w/ errors */
2239
79072805 2240 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
11fa937b
GS		 2241 if ((curop->op_type != OP_CONST ||
2242 (curop->op_private & OPpCONST_BARE)) &&
7a52d87a
GS		 2243 curop->op_type != OP_LIST &&
2244 curop->op_type != OP_SCALAR &&
2245 curop->op_type != OP_NULL &&
2246 curop->op_type != OP_PUSHMARK)
2247 {
79072805
LW		 2248 goto nope;
2249 }
2250 }
2251
2252 curop = LINKLIST(o);
2253 o->op_next = 0;
533c011a 2254 PL_op = curop;
cea2e8a9 2255 CALLRUNOPS(aTHX);
3280af22 2256 sv = *(PL_stack_sp--);
748a9306 2257 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 2258 pad_swipe(o->op_targ);
748a9306
LW		 2259 else if (SvTEMP(sv)) { /* grab mortal temp? */
2260 (void)SvREFCNT_inc(sv);
2261 SvTEMP_off(sv);
85e6fe83 2262 }
79072805
LW		 2263 op_free(o);
2264 if (type == OP_RV2GV)
b1cb66bf 2265 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 2266 else {
ee580363
GS		 2267 /* try to smush double to int, but don't smush -2.0 to -2 */
2268 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
2269 type != OP_NEGATE)
2270 {
748a9306 2271 IV iv = SvIV(sv);
65202027 2272 if ((NV)iv == SvNV(sv)) {
748a9306
LW		 2273 SvREFCNT_dec(sv);
2274 sv = newSViv(iv);
2275 }
b1cb66bf 2276 else
2277 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 2278 }
2279 return newSVOP(OP_CONST, 0, sv);
2280 }
aeea060c 2281
79072805 2282 nope:
22c35a8c 2283 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 2284 return o;
79072805 2285
3280af22 2286 if (!(PL_hints & HINT_INTEGER)) {
4bb9f687
GS		 2287 if (type == OP_MODULO
2288 || type == OP_DIVIDE
2289 || !(o->op_flags & OPf_KIDS))
2290 {
85e6fe83 2291 return o;
4bb9f687 2292 }
85e6fe83
LW		 2293
2294 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
2295 if (curop->op_type == OP_CONST) {
b1cb66bf 2296 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 2297 continue;
2298 return o;
2299 }
22c35a8c 2300 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 2301 continue;
2302 return o;
2303 }
22c35a8c 2304 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 2305 }
2306
79072805
LW		 2307 return o;
2308}
2309
2310OP *
864dbfa3 2311Perl_gen_constant_list(pTHX_ register OP *o)
79072805 2312{
11343788 2313 dTHR;
79072805 2314 register OP *curop;
3280af22 2315 I32 oldtmps_floor = PL_tmps_floor;
79072805 2316
a0d0e21e 2317 list(o);
3280af22 2318 if (PL_error_count)
a0d0e21e
LW		 2319 return o; /* Don't attempt to run with errors */
2320
533c011a 2321 PL_op = curop = LINKLIST(o);
a0d0e21e 2322 o->op_next = 0;
7d4045d4 2323 peep(curop);
cea2e8a9
GS		 2324 pp_pushmark();
2325 CALLRUNOPS(aTHX);
533c011a 2326 PL_op = curop;
cea2e8a9 2327 pp_anonlist();
3280af22 2328 PL_tmps_floor = oldtmps_floor;
79072805
LW		 2329
2330 o->op_type = OP_RV2AV;
22c35a8c 2331 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 2332 curop = ((UNOP*)o)->op_first;
3280af22 2333 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 2334 op_free(curop);
79072805
LW		 2335 linklist(o);
2336 return list(o);
2337}
2338
2339OP *
864dbfa3 2340Perl_convert(pTHX_ I32 type, I32 flags, OP *o)
79072805
LW		 2341{
2342 OP *kid;
a0d0e21e 2343 OP *last = 0;
79072805 2344
11343788
MB		 2345 if (!o || o->op_type != OP_LIST)
2346 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 2347 else
5dc0d613 2348 o->op_flags &= ~OPf_WANT;
79072805 2349
22c35a8c 2350 if (!(PL_opargs[type] & OA_MARK))
11343788 2351 null(cLISTOPo->op_first);
8990e307 2352
11343788 2353 o->op_type = type;
22c35a8c 2354 o->op_ppaddr = PL_ppaddr[type];
11343788 2355 o->op_flags |= flags;
79072805 2356
11343788
MB		 2357 o = CHECKOP(type, o);
2358 if (o->op_type != type)
2359 return o;
79072805 2360
11343788 2361 if (cLISTOPo->op_children < 7) {
79072805 2362 /* XXX do we really need to do this if we're done appending?? */
11343788 2363 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 2364 last = kid;
11343788 2365 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 2366 }
2367
11343788 2368 return fold_constants(o);
79072805
LW		 2369}
2370
2371/* List constructors */
2372
2373OP *
864dbfa3 2374Perl_append_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2375{
2376 if (!first)
2377 return last;
8990e307
LW		 2378
2379 if (!last)
79072805 2380 return first;
8990e307 2381
155aba94
GS		 2382 if (first->op_type != type
2383 || (type == OP_LIST && (first->op_flags & OPf_PARENS)))
2384 {
2385 return newLISTOP(type, 0, first, last);
2386 }
79072805 2387
a0d0e21e
LW		 2388 if (first->op_flags & OPf_KIDS)
2389 ((LISTOP*)first)->op_last->op_sibling = last;
2390 else {
2391 first->op_flags |= OPf_KIDS;
2392 ((LISTOP*)first)->op_first = last;
2393 }
2394 ((LISTOP*)first)->op_last = last;
2395 ((LISTOP*)first)->op_children++;
2396 return first;
79072805
LW		 2397}
2398
2399OP *
864dbfa3 2400Perl_append_list(pTHX_ I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 2401{
2402 if (!first)
2403 return (OP*)last;
8990e307
LW		 2404
2405 if (!last)
79072805 2406 return (OP*)first;
8990e307
LW		 2407
2408 if (first->op_type != type)
79072805 2409 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 2410
2411 if (last->op_type != type)
79072805
LW		 2412 return append_elem(type, (OP*)first, (OP*)last);
2413
2414 first->op_last->op_sibling = last->op_first;
2415 first->op_last = last->op_last;
2416 first->op_children += last->op_children;
2417 if (first->op_children)
acb74605 2418 first->op_flags |= OPf_KIDS;
1c846c1f 2419
b7dc083c
NIS		 2420#ifdef PL_OP_SLAB_ALLOC
2421#else
1c846c1f 2422 Safefree(last);
b7dc083c 2423#endif
79072805
LW		 2424 return (OP*)first;
2425}
2426
2427OP *
864dbfa3 2428Perl_prepend_elem(pTHX_ I32 type, OP *first, OP *last)
79072805
LW		 2429{
2430 if (!first)
2431 return last;
8990e307
LW		 2432
2433 if (!last)
79072805 2434 return first;
8990e307
LW		 2435
2436 if (last->op_type == type) {
2437 if (type == OP_LIST) { /* already a PUSHMARK there */
2438 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
2439 ((LISTOP*)last)->op_first->op_sibling = first;
2440 }
2441 else {
2442 if (!(last->op_flags & OPf_KIDS)) {
2443 ((LISTOP*)last)->op_last = first;
2444 last->op_flags |= OPf_KIDS;
2445 }
2446 first->op_sibling = ((LISTOP*)last)->op_first;
2447 ((LISTOP*)last)->op_first = first;
79072805 2448 }
79072805
LW		 2449 ((LISTOP*)last)->op_children++;
2450 return last;
2451 }
2452
2453 return newLISTOP(type, 0, first, last);
2454}
2455
2456/* Constructors */
2457
2458OP *
864dbfa3 2459Perl_newNULLLIST(pTHX)
79072805 2460{
8990e307
LW		 2461 return newOP(OP_STUB, 0);
2462}
2463
2464OP *
864dbfa3 2465Perl_force_list(pTHX_ OP *o)
8990e307 2466{
11343788
MB		 2467 if (!o || o->op_type != OP_LIST)
2468 o = newLISTOP(OP_LIST, 0, o, Nullop);
2469 null(o);
2470 return o;
79072805
LW		 2471}
2472
2473OP *
864dbfa3 2474Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2475{
2476 LISTOP *listop;
2477
b7dc083c 2478 NewOp(1101, listop, 1, LISTOP);
79072805
LW		 2479
2480 listop->op_type = type;
22c35a8c 2481 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2482 listop->op_children = (first != 0) + (last != 0);
2483 listop->op_flags = flags;
79072805
LW		 2484
2485 if (!last && first)
2486 last = first;
2487 else if (!first && last)
2488 first = last;
8990e307
LW		 2489 else if (first)
2490 first->op_sibling = last;
79072805
LW		 2491 listop->op_first = first;
2492 listop->op_last = last;
8990e307
LW		 2493 if (type == OP_LIST) {
2494 OP* pushop;
2495 pushop = newOP(OP_PUSHMARK, 0);
2496 pushop->op_sibling = first;
2497 listop->op_first = pushop;
2498 listop->op_flags |= OPf_KIDS;
2499 if (!last)
2500 listop->op_last = pushop;
2501 }
2502 else if (listop->op_children)
2503 listop->op_flags |= OPf_KIDS;
79072805
LW		 2504
2505 return (OP*)listop;
2506}
2507
2508OP *
864dbfa3 2509Perl_newOP(pTHX_ I32 type, I32 flags)
79072805 2510{
11343788 2511 OP *o;
b7dc083c 2512 NewOp(1101, o, 1, OP);
11343788 2513 o->op_type = type;
22c35a8c 2514 o->op_ppaddr = PL_ppaddr[type];
11343788 2515 o->op_flags = flags;
79072805 2516
11343788
MB		 2517 o->op_next = o;
2518 o->op_private = 0 + (flags >> 8);
22c35a8c 2519 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2520 scalar(o);
22c35a8c 2521 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2522 o->op_targ = pad_alloc(type, SVs_PADTMP);
2523 return CHECKOP(type, o);
79072805
LW		 2524}
2525
2526OP *
864dbfa3 2527Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first)
79072805
LW		 2528{
2529 UNOP *unop;
2530
93a17b20 2531 if (!first)
aeea060c 2532 first = newOP(OP_STUB, 0);
22c35a8c 2533 if (PL_opargs[type] & OA_MARK)
8990e307 2534 first = force_list(first);
93a17b20 2535
b7dc083c 2536 NewOp(1101, unop, 1, UNOP);
79072805 2537 unop->op_type = type;
22c35a8c 2538 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2539 unop->op_first = first;
2540 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2541 unop->op_private = 1 | (flags >> 8);
e50aee73 2542 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2543 if (unop->op_next)
2544 return (OP*)unop;
2545
a0d0e21e 2546 return fold_constants((OP *) unop);
79072805
LW		 2547}
2548
2549OP *
864dbfa3 2550Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2551{
2552 BINOP *binop;
b7dc083c 2553 NewOp(1101, binop, 1, BINOP);
79072805
LW		 2554
2555 if (!first)
2556 first = newOP(OP_NULL, 0);
2557
2558 binop->op_type = type;
22c35a8c 2559 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2560 binop->op_first = first;
2561 binop->op_flags = flags | OPf_KIDS;
2562 if (!last) {
2563 last = first;
c07a80fd 2564 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2565 }
2566 else {
c07a80fd 2567 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2568 first->op_sibling = last;
2569 }
2570
e50aee73 2571 binop = (BINOP*)CHECKOP(type, binop);
b162f9ea 2572 if (binop->op_next || binop->op_type != type)
79072805
LW		 2573 return (OP*)binop;
2574
7284ab6f 2575 binop->op_last = binop->op_first->op_sibling;
79072805 2576
a0d0e21e 2577 return fold_constants((OP *)binop);
79072805
LW		 2578}
2579
a0ed51b3
LW		 2580static int
2581utf8compare(const void *a, const void *b)
2582{
2583 int i;
2584 for (i = 0; i < 10; i++) {
2585 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2586 return -1;
2587 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2588 return 1;
2589 }
2590 return 0;
2591}
2592
79072805 2593OP *
864dbfa3 2594Perl_pmtrans(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2595{
79072805
LW		 2596 SV *tstr = ((SVOP*)expr)->op_sv;
2597 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2598 STRLEN tlen;
2599 STRLEN rlen;
ec49126f 2600 register U8 *t = (U8*)SvPV(tstr, tlen);
2601 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2602 register I32 i;
2603 register I32 j;
a0ed51b3 2604 I32 del;
79072805 2605 I32 complement;
5d06d08e 2606 I32 squash;
79072805
LW		 2607 register short *tbl;
2608
11343788 2609 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2610 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2611 squash = o->op_private & OPpTRANS_SQUASH;
1c846c1f 2612
036b4402
GS		 2613 if (SvUTF8(tstr))
2614 o->op_private |= OPpTRANS_FROM_UTF;
1c846c1f
NIS		 2615
2616 if (SvUTF8(rstr))
036b4402 2617 o->op_private |= OPpTRANS_TO_UTF;
79072805 2618
a0ed51b3 2619 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
79cb57f6 2620 SV* listsv = newSVpvn("# comment\n",10);
a0ed51b3
LW		 2621 SV* transv = 0;
2622 U8* tend = t + tlen;
2623 U8* rend = r + rlen;
2624 I32 ulen;
2625 U32 tfirst = 1;
2626 U32 tlast = 0;
2627 I32 tdiff;
2628 U32 rfirst = 1;
2629 U32 rlast = 0;
2630 I32 rdiff;
2631 I32 diff;
2632 I32 none = 0;
2633 U32 max = 0;
2634 I32 bits;
2635 I32 grows = 0;
2636 I32 havefinal = 0;
2637 U32 final;
a0ed51b3
LW		 2638 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2639 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2640
2641 if (complement) {
806e7201 2642 U8 tmpbuf[UTF8_MAXLEN];
a0ed51b3
LW		 2643 U8** cp;
2644 UV nextmin = 0;
2645 New(1109, cp, tlen, U8*);
2646 i = 0;
79cb57f6 2647 transv = newSVpvn("",0);
a0ed51b3
LW		 2648 while (t < tend) {
2649 cp[i++] = t;
2650 t += UTF8SKIP(t);
2651 if (*t == 0xff) {
2652 t++;
2653 t += UTF8SKIP(t);
2654 }
2655 }
2656 qsort(cp, i, sizeof(U8*), utf8compare);
2657 for (j = 0; j < i; j++) {
2658 U8 *s = cp[j];
8e84507e 2659 UV val = utf8_to_uv_chk(s, &ulen, 0);
a0ed51b3
LW		 2660 s += ulen;
2661 diff = val - nextmin;
2662 if (diff > 0) {
2663 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2664 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2665 if (diff > 1) {
2666 t = uv_to_utf8(tmpbuf, val - 1);
2667 sv_catpvn(transv, "\377", 1);
dfe13c55 2668 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2669 }
2670 }
2671 if (*s == 0xff)
8e84507e 2672 val = utf8_to_uv_chk(s+1, &ulen, 0);
a0ed51b3
LW		 2673 if (val >= nextmin)
2674 nextmin = val + 1;
2675 }
2676 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2677 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2678 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2679 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2680 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2681 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2682 tlen = SvCUR(transv);
2683 tend = t + tlen;
2684 }
2685 else if (!rlen && !del) {
2686 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2687 }
2688 if (!squash) {
12ae5dfc
JH		 2689 if (t == r ||
2690 (tlen == rlen && memEQ((char *)t, (char *)r, tlen)))
01ec43d0 2691 {
4757a243 2692 o->op_private |= OPpTRANS_IDENTICAL;
01ec43d0 2693 }
a0ed51b3
LW		 2694 }
2695
2696 while (t < tend || tfirst <= tlast) {
2697 /* see if we need more "t" chars */
2698 if (tfirst > tlast) {
8e84507e 2699 tfirst = (I32)utf8_to_uv_chk(t, &ulen, 0);
a0ed51b3
LW		 2700 t += ulen;
2701 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
8e84507e 2702 tlast = (I32)utf8_to_uv_chk(++t, &ulen, 0);
a0ed51b3
LW		 2703 t += ulen;
2704 }
2705 else
2706 tlast = tfirst;
2707 }
2708
2709 /* now see if we need more "r" chars */
2710 if (rfirst > rlast) {
2711 if (r < rend) {
8e84507e 2712 rfirst = (I32)utf8_to_uv_chk(r, &ulen, 0);
a0ed51b3
LW		 2713 r += ulen;
2714 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
8e84507e 2715 rlast = (I32)utf8_to_uv_chk(++r, &ulen, 0);
a0ed51b3
LW		 2716 r += ulen;
2717 }
2718 else
2719 rlast = rfirst;
2720 }
2721 else {
2722 if (!havefinal++)
2723 final = rlast;
2724 rfirst = rlast = 0xffffffff;
2725 }
2726 }
2727
2728 /* now see which range will peter our first, if either. */
2729 tdiff = tlast - tfirst;
2730 rdiff = rlast - rfirst;
2731
2732 if (tdiff <= rdiff)
2733 diff = tdiff;
2734 else
2735 diff = rdiff;
2736
2737 if (rfirst == 0xffffffff) {
2738 diff = tdiff; /* oops, pretend rdiff is infinite */
2739 if (diff > 0)
894356b3
GS		 2740 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n",
2741 (long)tfirst, (long)tlast);
a0ed51b3 2742 else
894356b3 2743 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst);
a0ed51b3
LW		 2744 }
2745 else {
2746 if (diff > 0)
894356b3
GS		 2747 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n",
2748 (long)tfirst, (long)(tfirst + diff),
2749 (long)rfirst);
a0ed51b3 2750 else
894356b3
GS		 2751 Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n",
2752 (long)tfirst, (long)rfirst);
a0ed51b3
LW		 2753
2754 if (rfirst + diff > max)
2755 max = rfirst + diff;
2756 rfirst += diff + 1;
2757 if (!grows) {
2758 if (rfirst <= 0x80)
2759 ;
2760 else if (rfirst <= 0x800)
2761 grows |= (tfirst < 0x80);
2762 else if (rfirst <= 0x10000)
2763 grows |= (tfirst < 0x800);
2764 else if (rfirst <= 0x200000)
2765 grows |= (tfirst < 0x10000);
2766 else if (rfirst <= 0x4000000)
2767 grows |= (tfirst < 0x200000);
2768 else if (rfirst <= 0x80000000)
2769 grows |= (tfirst < 0x4000000);
2770 }
2771 }
2772 tfirst += diff + 1;
2773 }
2774
2775 none = ++max;
2776 if (del)
2777 del = ++max;
2778
2779 if (max > 0xffff)
2780 bits = 32;
2781 else if (max > 0xff)
2782 bits = 16;
2783 else
2784 bits = 8;
2785
2786 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2787 SvREFCNT_dec(listsv);
2788 if (transv)
2789 SvREFCNT_dec(transv);
2790
2791 if (!del && havefinal)
b448e4fe
JH		 2792 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5,
2793 newSVuv((UV)final), 0);
a0ed51b3
LW		 2794
2795 if (grows && to_utf)
2796 o->op_private |= OPpTRANS_GROWS;
2797
2798 op_free(expr);
2799 op_free(repl);
2800 return o;
2801 }
2802
2803 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2804 if (complement) {
2805 Zero(tbl, 256, short);
2806 for (i = 0; i < tlen; i++)
ec49126f 2807 tbl[t[i]] = -1;
79072805
LW		 2808 for (i = 0, j = 0; i < 256; i++) {
2809 if (!tbl[i]) {
2810 if (j >= rlen) {
a0ed51b3 2811 if (del)
79072805
LW		 2812 tbl[i] = -2;
2813 else if (rlen)
ec49126f 2814 tbl[i] = r[j-1];
79072805
LW		 2815 else
2816 tbl[i] = i;
2817 }
2818 else
ec49126f 2819 tbl[i] = r[j++];
79072805
LW		 2820 }
2821 }
2822 }
2823 else {
a0ed51b3 2824 if (!rlen && !del) {
79072805 2825 r = t; rlen = tlen;
5d06d08e 2826 if (!squash)
4757a243 2827 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2828 }
2829 for (i = 0; i < 256; i++)
2830 tbl[i] = -1;
2831 for (i = 0, j = 0; i < tlen; i++,j++) {
2832 if (j >= rlen) {
a0ed51b3 2833 if (del) {
ec49126f 2834 if (tbl[t[i]] == -1)
2835 tbl[t[i]] = -2;
79072805
LW		 2836 continue;
2837 }
2838 --j;
2839 }
ec49126f 2840 if (tbl[t[i]] == -1)
2841 tbl[t[i]] = r[j];
79072805
LW		 2842 }
2843 }
2844 op_free(expr);
2845 op_free(repl);
2846
11343788 2847 return o;
79072805
LW		 2848}
2849
2850OP *
864dbfa3 2851Perl_newPMOP(pTHX_ I32 type, I32 flags)
79072805 2852{
11343788 2853 dTHR;
79072805
LW		 2854 PMOP *pmop;
2855
b7dc083c 2856 NewOp(1101, pmop, 1, PMOP);
79072805 2857 pmop->op_type = type;
22c35a8c 2858 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2859 pmop->op_flags = flags;
c07a80fd 2860 pmop->op_private = 0 | (flags >> 8);
79072805 2861
3280af22 2862 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2863 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2864 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2865 pmop->op_pmpermflags |= PMf_LOCALE;
2866 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2867
79072805 2868 /* link into pm list */
3280af22
NIS		 2869 if (type != OP_TRANS && PL_curstash) {
2870 pmop->op_pmnext = HvPMROOT(PL_curstash);
2871 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2872 }
2873
2874 return (OP*)pmop;
2875}
2876
2877OP *
864dbfa3 2878Perl_pmruntime(pTHX_ OP *o, OP *expr, OP *repl)
79072805 2879{
5c0ca799 2880 dTHR;
79072805
LW		 2881 PMOP *pm;
2882 LOGOP *rcop;
ce862d02 2883 I32 repl_has_vars = 0;
79072805 2884
11343788
MB		 2885 if (o->op_type == OP_TRANS)
2886 return pmtrans(o, expr, repl);
79072805 2887
3280af22 2888 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2889 pm = (PMOP*)o;
79072805
LW		 2890
2891 if (expr->op_type == OP_CONST) {
463ee0b2 2892 STRLEN plen;
79072805 2893 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2894 char *p = SvPV(pat, plen);
11343788 2895 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2896 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2897 p = SvPV(pat, plen);
79072805
LW		 2898 pm->op_pmflags |= PMf_SKIPWHITE;
2899 }
393fec97 2900 if ((PL_hints & HINT_UTF8) || (SvUTF8(pat) && !(PL_hints & HINT_BYTE)))
7e2040f0 2901 pm->op_pmdynflags |= PMdf_UTF8;
cea2e8a9 2902 pm->op_pmregexp = CALLREGCOMP(aTHX_ p, p + plen, pm);
aeea060c 2903 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2904 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2905 op_free(expr);
2906 }
2907 else {
393fec97
GS		 2908 if (PL_hints & HINT_UTF8)
2909 pm->op_pmdynflags |= PMdf_UTF8;
3280af22 2910 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
1c846c1f 2911 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2912 ? OP_REGCRESET
2913 : OP_REGCMAYBE),0,expr);
463ee0b2 2914
b7dc083c 2915 NewOp(1101, rcop, 1, LOGOP);
79072805 2916 rcop->op_type = OP_REGCOMP;
22c35a8c 2917 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2918 rcop->op_first = scalar(expr);
1c846c1f 2919 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2920 ? (OPf_SPECIAL | OPf_KIDS)
2921 : OPf_KIDS);
79072805 2922 rcop->op_private = 1;
11343788 2923 rcop->op_other = o;
79072805
LW		 2924
2925 /* establish postfix order */
3280af22 2926 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2927 LINKLIST(expr);
2928 rcop->op_next = expr;
2929 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2930 }
2931 else {
2932 rcop->op_next = LINKLIST(expr);
2933 expr->op_next = (OP*)rcop;
2934 }
79072805 2935
11343788 2936 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2937 }
2938
2939 if (repl) {
748a9306 2940 OP *curop;
0244c3a4 2941 if (pm->op_pmflags & PMf_EVAL) {
748a9306 2942 curop = 0;
57843af0
GS		 2943 if (CopLINE(PL_curcop) < PL_multi_end)
2944 CopLINE_set(PL_curcop, PL_multi_end);
0244c3a4 2945 }
554b3eca 2946#ifdef USE_THREADS
2faa37cc 2947 else if (repl->op_type == OP_THREADSV
554b3eca 2948 && strchr("&`'123456789+",
533c011a 2949 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2950 {
2951 curop = 0;
2952 }
2953#endif /* USE_THREADS */
748a9306
LW		 2954 else if (repl->op_type == OP_CONST)
2955 curop = repl;
79072805 2956 else {
79072805
LW		 2957 OP *lastop = 0;
2958 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2959 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2960#ifdef USE_THREADS
ce862d02
IZ		 2961 if (curop->op_type == OP_THREADSV) {
2962 repl_has_vars = 1;
be949f6f 2963 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2964 break;
554b3eca
MB		 2965 }
2966#else
79072805 2967 if (curop->op_type == OP_GV) {
638eceb6 2968 GV *gv = cGVOPx_gv(curop);
ce862d02 2969 repl_has_vars = 1;
93a17b20 2970 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2971 break;
2972 }
554b3eca 2973#endif /* USE_THREADS */
79072805
LW		 2974 else if (curop->op_type == OP_RV2CV)
2975 break;
2976 else if (curop->op_type == OP_RV2SV ||
2977 curop->op_type == OP_RV2AV ||
2978 curop->op_type == OP_RV2HV ||
2979 curop->op_type == OP_RV2GV) {
2980 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2981 break;
2982 }
748a9306
LW		 2983 else if (curop->op_type == OP_PADSV ||
2984 curop->op_type == OP_PADAV ||
2985 curop->op_type == OP_PADHV ||
554b3eca 2986 curop->op_type == OP_PADANY) {
ce862d02 2987 repl_has_vars = 1;
748a9306 2988 }
1167e5da
SM		 2989 else if (curop->op_type == OP_PUSHRE)
2990 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2991 else
2992 break;
2993 }
2994 lastop = curop;
2995 }
748a9306 2996 }
ce862d02 2997 if (curop == repl
1c846c1f
NIS		 2998 && !(repl_has_vars
2999 && (!pm->op_pmregexp
ce862d02 3000 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 3001 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 3002 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 3003 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 3004 }
3005 else {
ce862d02
IZ		 3006 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
3007 pm->op_pmflags |= PMf_MAYBE_CONST;
3008 pm->op_pmpermflags |= PMf_MAYBE_CONST;
3009 }
b7dc083c 3010 NewOp(1101, rcop, 1, LOGOP);
748a9306 3011 rcop->op_type = OP_SUBSTCONT;
22c35a8c 3012 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 3013 rcop->op_first = scalar(repl);
3014 rcop->op_flags |= OPf_KIDS;
3015 rcop->op_private = 1;
11343788 3016 rcop->op_other = o;
748a9306
LW		 3017
3018 /* establish postfix order */
3019 rcop->op_next = LINKLIST(repl);
3020 repl->op_next = (OP*)rcop;
3021
3022 pm->op_pmreplroot = scalar((OP*)rcop);
3023 pm->op_pmreplstart = LINKLIST(rcop);
3024 rcop->op_next = 0;
79072805
LW		 3025 }
3026 }
3027
3028 return (OP*)pm;
3029}
3030
3031OP *
864dbfa3 3032Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv)
79072805
LW		 3033{
3034 SVOP *svop;
b7dc083c 3035 NewOp(1101, svop, 1, SVOP);
79072805 3036 svop->op_type = type;
22c35a8c 3037 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3038 svop->op_sv = sv;
3039 svop->op_next = (OP*)svop;
3040 svop->op_flags = flags;
22c35a8c 3041 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3042 scalar((OP*)svop);
22c35a8c 3043 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3044 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3045 return CHECKOP(type, svop);
79072805
LW		 3046}
3047
3048OP *
350de78d
GS		 3049Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv)
3050{
3051 PADOP *padop;
3052 NewOp(1101, padop, 1, PADOP);
3053 padop->op_type = type;
3054 padop->op_ppaddr = PL_ppaddr[type];
3055 padop->op_padix = pad_alloc(type, SVs_PADTMP);
7766f137 3056 SvREFCNT_dec(PL_curpad[padop->op_padix]);
350de78d 3057 PL_curpad[padop->op_padix] = sv;
7766f137 3058 SvPADTMP_on(sv);
350de78d
GS		 3059 padop->op_next = (OP*)padop;
3060 padop->op_flags = flags;
3061 if (PL_opargs[type] & OA_RETSCALAR)
3062 scalar((OP*)padop);
3063 if (PL_opargs[type] & OA_TARGET)
3064 padop->op_targ = pad_alloc(type, SVs_PADTMP);
3065 return CHECKOP(type, padop);
3066}
3067
3068OP *
864dbfa3 3069Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv)
79072805 3070{
11343788 3071 dTHR;
350de78d 3072#ifdef USE_ITHREADS
743e66e6 3073 GvIN_PAD_on(gv);
350de78d
GS		 3074 return newPADOP(type, flags, SvREFCNT_inc(gv));
3075#else
7934575e 3076 return newSVOP(type, flags, SvREFCNT_inc(gv));
350de78d 3077#endif
79072805
LW		 3078}
3079
3080OP *
864dbfa3 3081Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv)
79072805
LW		 3082{
3083 PVOP *pvop;
b7dc083c 3084 NewOp(1101, pvop, 1, PVOP);
79072805 3085 pvop->op_type = type;
22c35a8c 3086 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3087 pvop->op_pv = pv;
3088 pvop->op_next = (OP*)pvop;
3089 pvop->op_flags = flags;
22c35a8c 3090 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 3091 scalar((OP*)pvop);
22c35a8c 3092 if (PL_opargs[type] & OA_TARGET)
ed6116ce 3093 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 3094 return CHECKOP(type, pvop);
79072805
LW		 3095}
3096
79072805 3097void
864dbfa3 3098Perl_package(pTHX_ OP *o)
79072805 3099{
11343788 3100 dTHR;
93a17b20 3101 SV *sv;
79072805 3102
3280af22
NIS		 3103 save_hptr(&PL_curstash);
3104 save_item(PL_curstname);
11343788 3105 if (o) {
463ee0b2
LW		 3106 STRLEN len;
3107 char *name;
11343788 3108 sv = cSVOPo->op_sv;
463ee0b2 3109 name = SvPV(sv, len);
3280af22
NIS		 3110 PL_curstash = gv_stashpvn(name,len,TRUE);
3111 sv_setpvn(PL_curstname, name, len);
11343788 3112 op_free(o);
93a17b20
LW		 3113 }
3114 else {
3280af22
NIS		 3115 sv_setpv(PL_curstname,"<none>");
3116 PL_curstash = Nullhv;
93a17b20 3117 }
7ad382f4 3118 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3119 PL_copline = NOLINE;
3120 PL_expect = XSTATE;
79072805
LW		 3121}
3122
85e6fe83 3123void
864dbfa3 3124Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 3125{
a0d0e21e 3126 OP *pack;
a0d0e21e
LW		 3127 OP *rqop;
3128 OP *imop;
b1cb66bf 3129 OP *veop;
78ca652e 3130 GV *gv;
85e6fe83 3131
a0d0e21e 3132 if (id->op_type != OP_CONST)
cea2e8a9 3133 Perl_croak(aTHX_ "Module name must be constant");
85e6fe83 3134
b1cb66bf 3135 veop = Nullop;
3136
0f79a09d 3137 if (version != Nullop) {
b1cb66bf 3138 SV *vesv = ((SVOP*)version)->op_sv;
3139
44dcb63b 3140 if (arg == Nullop && !SvNIOKp(vesv)) {
b1cb66bf 3141 arg = version;
3142 }
3143 else {
3144 OP *pack;
0f79a09d 3145 SV *meth;
b1cb66bf 3146
44dcb63b 3147 if (version->op_type != OP_CONST || !SvNIOKp(vesv))
cea2e8a9 3148 Perl_croak(aTHX_ "Version number must be constant number");
b1cb66bf 3149
3150 /* Make copy of id so we don't free it twice */
3151 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
3152
3153 /* Fake up a method call to VERSION */
0f79a09d
GS		 3154 meth = newSVpvn("VERSION",7);
3155 sv_upgrade(meth, SVt_PVIV);
155aba94 3156 (void)SvIOK_on(meth);
0f79a09d 3157 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
b1cb66bf 3158 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
3159 append_elem(OP_LIST,
0f79a09d
GS		 3160 prepend_elem(OP_LIST, pack, list(version)),
3161 newSVOP(OP_METHOD_NAMED, 0, meth)));
b1cb66bf 3162 }
3163 }
aeea060c 3164
a0d0e21e 3165 /* Fake up an import/unimport */
4633a7c4
LW		 3166 if (arg && arg->op_type == OP_STUB)
3167 imop = arg; /* no import on explicit () */
44dcb63b 3168 else if (SvNIOKp(((SVOP*)id)->op_sv)) {
b1cb66bf 3169 imop = Nullop; /* use 5.0; */
3170 }
4633a7c4 3171 else {
0f79a09d
GS		 3172 SV *meth;
3173
4633a7c4
LW		 3174 /* Make copy of id so we don't free it twice */
3175 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
0f79a09d
GS		 3176
3177 /* Fake up a method call to import/unimport */
3178 meth = aver ? newSVpvn("import",6) : newSVpvn("unimport", 8);;
3179 sv_upgrade(meth, SVt_PVIV);
155aba94 3180 (void)SvIOK_on(meth);
0f79a09d 3181 PERL_HASH(SvUVX(meth), SvPVX(meth), SvCUR(meth));
4633a7c4 3182 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
0f79a09d
GS		 3183 append_elem(OP_LIST,
3184 prepend_elem(OP_LIST, pack, list(arg)),
3185 newSVOP(OP_METHOD_NAMED, 0, meth)));
4633a7c4
LW		 3186 }
3187
78ca652e
GS		 3188 /* Fake up a require, handle override, if any */
3189 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
3190 if (!(gv && GvIMPORTED_CV(gv)))
3191 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
3192
3193 if (gv && GvIMPORTED_CV(gv)) {
3194 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3195 append_elem(OP_LIST, id,
3196 scalar(newUNOP(OP_RV2CV, 0,
3197 newGVOP(OP_GV, 0,
3198 gv))))));
3199 }
3200 else {
3201 rqop = newUNOP(OP_REQUIRE, 0, id);
3202 }
a0d0e21e
LW		 3203
3204 /* Fake up the BEGIN {}, which does its thing immediately. */
09bef843 3205 newATTRSUB(floor,
79cb57f6 3206 newSVOP(OP_CONST, 0, newSVpvn("BEGIN", 5)),
4633a7c4 3207 Nullop,
09bef843 3208 Nullop,
a0d0e21e 3209 append_elem(OP_LINESEQ,
b1cb66bf 3210 append_elem(OP_LINESEQ,
3211 newSTATEOP(0, Nullch, rqop),
3212 newSTATEOP(0, Nullch, veop)),
a0d0e21e 3213 newSTATEOP(0, Nullch, imop) ));
85e6fe83 3214
c305c6a0 3215 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 3216 PL_copline = NOLINE;
3217 PL_expect = XSTATE;
85e6fe83
LW		 3218}
3219
e4783991
GS		 3220void
3221Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...)
3222{
3223 va_list args;
3224 va_start(args, ver);
3225 vload_module(flags, name, ver, &args);
3226 va_end(args);
3227}
3228
3229#ifdef PERL_IMPLICIT_CONTEXT
3230void
3231Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...)
3232{
3233 dTHX;
3234 va_list args;
3235 va_start(args, ver);
3236 vload_module(flags, name, ver, &args);
3237 va_end(args);
3238}
3239#endif
3240
3241void
3242Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args)
3243{
3244 OP *modname, *veop, *imop;
3245
3246 modname = newSVOP(OP_CONST, 0, name);
3247 modname->op_private |= OPpCONST_BARE;
3248 if (ver) {
3249 veop = newSVOP(OP_CONST, 0, ver);
3250 }
3251 else
3252 veop = Nullop;
3253 if (flags & PERL_LOADMOD_NOIMPORT) {
3254 imop = sawparens(newNULLLIST());
3255 }
3256 else if (flags & PERL_LOADMOD_IMPORT_OPS) {
3257 imop = va_arg(*args, OP*);
3258 }
3259 else {
3260 SV *sv;
3261 imop = Nullop;
3262 sv = va_arg(*args, SV*);
3263 while (sv) {
3264 imop = append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv));
3265 sv = va_arg(*args, SV*);
3266 }
3267 }
81885997
GS		 3268 {
3269 line_t ocopline = PL_copline;
3270 int oexpect = PL_expect;
3271
3272 utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0),
3273 veop, modname, imop);
3274 PL_expect = oexpect;
3275 PL_copline = ocopline;
3276 }
e4783991
GS		 3277}
3278
79072805 3279OP *
864dbfa3 3280Perl_dofile(pTHX_ OP *term)
78ca652e
GS		 3281{
3282 OP *doop;
3283 GV *gv;
3284
3285 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
3286 if (!(gv && GvIMPORTED_CV(gv)))
3287 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
3288
3289 if (gv && GvIMPORTED_CV(gv)) {
3290 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
3291 append_elem(OP_LIST, term,
3292 scalar(newUNOP(OP_RV2CV, 0,
3293 newGVOP(OP_GV, 0,
3294 gv))))));
3295 }
3296 else {
3297 doop = newUNOP(OP_DOFILE, 0, scalar(term));
3298 }
3299 return doop;
3300}
3301
3302OP *
864dbfa3 3303Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval)
79072805
LW		 3304{
3305 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 3306 list(force_list(subscript)),
3307 list(force_list(listval)) );
79072805
LW		 3308}
3309
76e3520e 3310STATIC I32
cea2e8a9 3311S_list_assignment(pTHX_ register OP *o)
79072805 3312{
11343788 3313 if (!o)
79072805
LW		 3314 return TRUE;
3315
11343788
MB		 3316 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
3317 o = cUNOPo->op_first;
79072805 3318
11343788 3319 if (o->op_type == OP_COND_EXPR) {
1a67a97c
SM		 3320 I32 t = list_assignment(cLOGOPo->op_first->op_sibling);
3321 I32 f = list_assignment(cLOGOPo->op_first->op_sibling->op_sibling);
79072805
LW		 3322
3323 if (t && f)
3324 return TRUE;
3325 if (t || f)
3326 yyerror("Assignment to both a list and a scalar");
3327 return FALSE;
3328 }
3329
11343788
MB		 3330 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
3331 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
3332 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 3333 return TRUE;
3334
11343788 3335 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 3336 return TRUE;
3337
11343788 3338 if (o->op_type == OP_RV2SV)
79072805
LW		 3339 return FALSE;
3340
3341 return FALSE;
3342}
3343
3344OP *
864dbfa3 3345Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right)
79072805 3346{
11343788 3347 OP *o;
79072805 3348
a0d0e21e
LW		 3349 if (optype) {
3350 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
3351 return newLOGOP(optype, 0,
3352 mod(scalar(left), optype),
3353 newUNOP(OP_SASSIGN, 0, scalar(right)));
3354 }
3355 else {
3356 return newBINOP(optype, OPf_STACKED,
3357 mod(scalar(left), optype), scalar(right));
3358 }
3359 }
3360
79072805 3361 if (list_assignment(left)) {
6ee623d5 3362 dTHR;
10c8fecd
GS		 3363 OP *curop;
3364
3280af22
NIS		 3365 PL_modcount = 0;
3366 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 3367 left = mod(left, OP_AASSIGN);
3280af22
NIS		 3368 if (PL_eval_start)
3369 PL_eval_start = 0;
748a9306 3370 else {
a0d0e21e
LW		 3371 op_free(left);
3372 op_free(right);
3373 return Nullop;
3374 }
10c8fecd
GS		 3375 curop = list(force_list(left));
3376 o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop);
11343788 3377 o->op_private = 0 | (flags >> 8);
10c8fecd
GS		 3378 for (curop = ((LISTOP*)curop)->op_first;
3379 curop; curop = curop->op_sibling)
3380 {
3381 if (curop->op_type == OP_RV2HV &&
3382 ((UNOP*)curop)->op_first->op_type != OP_GV) {
3383 o->op_private |= OPpASSIGN_HASH;
3384 break;
3385 }
3386 }
a0d0e21e 3387 if (!(left->op_private & OPpLVAL_INTRO)) {
11343788 3388 OP *lastop = o;
3280af22 3389 PL_generation++;
11343788 3390 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 3391 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805 3392 if (curop->op_type == OP_GV) {
638eceb6 3393 GV *gv = cGVOPx_gv(curop);
3280af22 3394 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 3395 break;
3280af22 3396 SvCUR(gv) = PL_generation;
79072805 3397 }
748a9306
LW		 3398 else if (curop->op_type == OP_PADSV ||
3399 curop->op_type == OP_PADAV ||
3400 curop->op_type == OP_PADHV ||
3401 curop->op_type == OP_PADANY) {
3280af22 3402 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 3403 SV *sv = svp[curop->op_targ];
3280af22 3404 if (SvCUR(sv) == PL_generation)
748a9306 3405 break;
3280af22 3406 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 3407 }
79072805
LW		 3408 else if (curop->op_type == OP_RV2CV)
3409 break;
3410 else if (curop->op_type == OP_RV2SV ||
3411 curop->op_type == OP_RV2AV ||
3412 curop->op_type == OP_RV2HV ||
3413 curop->op_type == OP_RV2GV) {
3414 if (lastop->op_type != OP_GV) /* funny deref? */
3415 break;
3416 }
1167e5da
SM		 3417 else if (curop->op_type == OP_PUSHRE) {
3418 if (((PMOP*)curop)->op_pmreplroot) {
b3f5893f
GS		 3419#ifdef USE_ITHREADS
3420 GV *gv = (GV*)PL_curpad[(PADOFFSET)((PMOP*)curop)->op_pmreplroot];
3421#else
1167e5da 3422 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
b3f5893f 3423#endif
3280af22 3424 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 3425 break;
3280af22 3426 SvCUR(gv) = PL_generation;
1167e5da
SM		 3427 }
3428 }
79072805
LW		 3429 else
3430 break;
3431 }
3432 lastop = curop;
3433 }
11343788 3434 if (curop != o)
10c8fecd 3435 o->op_private |= OPpASSIGN_COMMON;
79072805 3436 }
c07a80fd 3437 if (right && right->op_type == OP_SPLIT) {
3438 OP* tmpop;
3439 if ((tmpop = ((LISTOP*)right)->op_first) &&
3440 tmpop->op_type == OP_PUSHRE)
3441 {
3442 PMOP *pm = (PMOP*)tmpop;
3443 if (left->op_type == OP_RV2AV &&
3444 !(left->op_private & OPpLVAL_INTRO) &&
11343788 3445 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 3446 {
3447 tmpop = ((UNOP*)left)->op_first;
3448 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
971a9dd3
GS		 3449#ifdef USE_ITHREADS
3450 pm->op_pmreplroot = (OP*)cPADOPx(tmpop)->op_padix;
3451 cPADOPx(tmpop)->op_padix = 0; /* steal it */
3452#else
3453 pm->op_pmreplroot = (OP*)cSVOPx(tmpop)->op_sv;
3454 cSVOPx(tmpop)->op_sv = Nullsv; /* steal it */
3455#endif
c07a80fd 3456 pm->op_pmflags |= PMf_ONCE;
11343788 3457 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 3458 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
3459 tmpop->op_sibling = Nullop; /* don't free split */
3460 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 3461 op_free(o); /* blow off assign */
54310121 3462 right->op_flags &= ~OPf_WANT;
a5f75d66 3463 /* "I don't know and I don't care." */
c07a80fd 3464 return right;
3465 }
3466 }
3467 else {
3280af22 3468 if (PL_modcount < 10000 &&
c07a80fd 3469 ((LISTOP*)right)->op_last->op_type == OP_CONST)
3470 {
3471 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
3472 if (SvIVX(sv) == 0)
3280af22 3473 sv_setiv(sv, PL_modcount+1);
c07a80fd 3474 }
3475 }
3476 }
3477 }
11343788 3478 return o;
79072805
LW		 3479 }
3480 if (!right)
3481 right = newOP(OP_UNDEF, 0);
3482 if (right->op_type == OP_READLINE) {
3483 right->op_flags |= OPf_STACKED;
463ee0b2 3484 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 3485 }
a0d0e21e 3486 else {
3280af22 3487 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 3488 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 3489 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 3490 if (PL_eval_start)
3491 PL_eval_start = 0;
748a9306 3492 else {
11343788 3493 op_free(o);
a0d0e21e
LW		 3494 return Nullop;
3495 }
3496 }
11343788 3497 return o;
79072805
LW		 3498}
3499
3500OP *
864dbfa3 3501Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o)
79072805 3502{
11343788 3503 dTHR;
bbce6d69 3504 U32 seq = intro_my();
79072805
LW		 3505 register COP *cop;
3506
b7dc083c 3507 NewOp(1101, cop, 1, COP);
57843af0 3508 if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) {
8990e307 3509 cop->op_type = OP_DBSTATE;
22c35a8c 3510 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 3511 }
3512 else {
3513 cop->op_type = OP_NEXTSTATE;
22c35a8c 3514 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 3515 }
79072805 3516 cop->op_flags = flags;
393fec97 3517 cop->op_private = (PL_hints & HINT_BYTE);
ff0cee69 3518#ifdef NATIVE_HINTS
3519 cop->op_private |= NATIVE_HINTS;
3520#endif
e24b16f9 3521 PL_compiling.op_private = cop->op_private;
79072805
LW		 3522 cop->op_next = (OP*)cop;
3523
463ee0b2
LW		 3524 if (label) {
3525 cop->cop_label = label;
3280af22 3526 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 3527 }
bbce6d69 3528 cop->cop_seq = seq;
3280af22 3529 cop->cop_arybase = PL_curcop->cop_arybase;
0453d815 3530 if (specialWARN(PL_curcop->cop_warnings))
599cee73 3531 cop->cop_warnings = PL_curcop->cop_warnings ;
1c846c1f 3532 else
599cee73
PM		 3533 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
3534
79072805 3535
3280af22 3536 if (PL_copline == NOLINE)
57843af0 3537 CopLINE_set(cop, CopLINE(PL_curcop));
79072805 3538 else {
57843af0 3539 CopLINE_set(cop, PL_copline);
3280af22 3540 PL_copline = NOLINE;
79072805 3541 }
57843af0 3542#ifdef USE_ITHREADS
f4dd75d9 3543 CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */
57843af0 3544#else
f4dd75d9 3545 CopFILEGV_set(cop, CopFILEGV(PL_curcop));
57843af0 3546#endif
11faa288 3547 CopSTASH_set(cop, PL_curstash);
79072805 3548
3280af22 3549 if (PERLDB_LINE && PL_curstash != PL_debstash) {
cc49e20b 3550 SV **svp = av_fetch(CopFILEAV(PL_curcop), (I32)CopLINE(cop), FALSE);
3280af22 3551 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 3552 (void)SvIOK_on(*svp);
57b2e452 3553 SvIVX(*svp) = PTR2IV(cop);
93a17b20
LW		 3554 }
3555 }
3556
11343788 3557 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 3558}
3559
bbce6d69 3560/* "Introduce" my variables to visible status. */
3561U32
864dbfa3 3562Perl_intro_my(pTHX)
bbce6d69 3563{
3564 SV **svp;
3565 SV *sv;
3566 I32 i;
3567
3280af22
NIS		 3568 if (! PL_min_intro_pending)
3569 return PL_cop_seqmax;
bbce6d69 3570
3280af22
NIS		 3571 svp = AvARRAY(PL_comppad_name);
3572 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
3573 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 3574 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
65202027 3575 SvNVX(sv) = (NV)PL_cop_seqmax;
bbce6d69 3576 }
3577 }
3280af22
NIS		 3578 PL_min_intro_pending = 0;
3579 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
3580 return PL_cop_seqmax++;
bbce6d69 3581}
3582
79072805 3583OP *
864dbfa3 3584Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other)
79072805 3585{
883ffac3
CS		 3586 return new_logop(type, flags, &first, &other);
3587}
3588
3bd495df 3589STATIC OP *
cea2e8a9 3590S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp)
883ffac3 3591{
11343788 3592 dTHR;
79072805 3593 LOGOP *logop;
11343788 3594 OP *o;
883ffac3
CS		 3595 OP *first = *firstp;
3596 OP *other = *otherp;
79072805 3597
a0d0e21e
LW		 3598 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3599 return newBINOP(type, flags, scalar(first), scalar(other));
3600
8990e307 3601 scalarboolean(first);
79072805
LW		 3602 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3603 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3604 if (type == OP_AND || type == OP_OR) {
3605 if (type == OP_AND)
3606 type = OP_OR;
3607 else
3608 type = OP_AND;
11343788 3609 o = first;
883ffac3 3610 first = *firstp = cUNOPo->op_first;
11343788
MB		 3611 if (o->op_next)
3612 first->op_next = o->op_next;
3613 cUNOPo->op_first = Nullop;
3614 op_free(o);
79072805
LW		 3615 }
3616 }
3617 if (first->op_type == OP_CONST) {
4673fc70 3618 if (ckWARN(WARN_BAREWORD) && (first->op_private & OPpCONST_BARE))
1c846c1f 3619 Perl_warner(aTHX_ WARN_BAREWORD, "Bareword found in conditional");
79072805
LW		 3620 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3621 op_free(first);
883ffac3 3622 *firstp = Nullop;
79072805
LW		 3623 return other;
3624 }
3625 else {
3626 op_free(other);
883ffac3 3627 *otherp = Nullop;
79072805
LW		 3628 return first;
3629 }
3630 }
3631 else if (first->op_type == OP_WANTARRAY) {
3632 if (type == OP_AND)
3633 list(other);
3634 else
3635 scalar(other);
3636 }
e476b1b5 3637 else if (ckWARN(WARN_MISC) && (first->op_flags & OPf_KIDS)) {
a6006777 3638 OP *k1 = ((UNOP*)first)->op_first;
3639 OP *k2 = k1->op_sibling;
3640 OPCODE warnop = 0;
3641 switch (first->op_type)
3642 {
3643 case OP_NULL:
3644 if (k2 && k2->op_type == OP_READLINE
3645 && (k2->op_flags & OPf_STACKED)
1c846c1f 3646 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
72b16652 3647 {
a6006777 3648 warnop = k2->op_type;
72b16652 3649 }
a6006777 3650 break;
3651
3652 case OP_SASSIGN:
68dc0745 3653 if (k1->op_type == OP_READDIR
3654 || k1->op_type == OP_GLOB
72b16652 3655 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
68dc0745 3656 || k1->op_type == OP_EACH)
72b16652
GS		 3657 {
3658 warnop = ((k1->op_type == OP_NULL)
3659 ? k1->op_targ : k1->op_type);
3660 }
a6006777 3661 break;
3662 }
8ebc5c01 3663 if (warnop) {
57843af0
GS		 3664 line_t oldline = CopLINE(PL_curcop);
3665 CopLINE_set(PL_curcop, PL_copline);
e476b1b5 3666 Perl_warner(aTHX_ WARN_MISC,
599cee73 3667 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3668 PL_op_desc[warnop],
68dc0745 3669 ((warnop == OP_READLINE || warnop == OP_GLOB)
3670 ? " construct" : "() operator"));
57843af0 3671 CopLINE_set(PL_curcop, oldline);
8ebc5c01 3672 }
a6006777 3673 }
79072805
LW		 3674
3675 if (!other)
3676 return first;
3677
a0d0e21e
LW		 3678 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3679 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3680
b7dc083c 3681 NewOp(1101, logop, 1, LOGOP);
79072805
LW		 3682
3683 logop->op_type = type;
22c35a8c 3684 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3685 logop->op_first = first;
3686 logop->op_flags = flags | OPf_KIDS;
3687 logop->op_other = LINKLIST(other);
c07a80fd 3688 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3689
3690 /* establish postfix order */
3691 logop->op_next = LINKLIST(first);
3692 first->op_next = (OP*)logop;
3693 first->op_sibling = other;
3694
11343788
MB		 3695 o = newUNOP(OP_NULL, 0, (OP*)logop);
3696 other->op_next = o;
79072805 3697
11343788 3698 return o;
79072805
LW		 3699}
3700
3701OP *
864dbfa3 3702Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3703{
11343788 3704 dTHR;
1a67a97c
SM		 3705 LOGOP *logop;
3706 OP *start;
11343788 3707 OP *o;
79072805 3708
b1cb66bf 3709 if (!falseop)
3710 return newLOGOP(OP_AND, 0, first, trueop);
3711 if (!trueop)
3712 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3713
8990e307 3714 scalarboolean(first);
79072805
LW		 3715 if (first->op_type == OP_CONST) {
3716 if (SvTRUE(((SVOP*)first)->op_sv)) {
3717 op_free(first);
b1cb66bf 3718 op_free(falseop);
3719 return trueop;
79072805
LW		 3720 }
3721 else {
3722 op_free(first);
b1cb66bf 3723 op_free(trueop);
3724 return falseop;
79072805
LW		 3725 }
3726 }
3727 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3728 list(trueop);
3729 scalar(falseop);
79072805 3730 }
1a67a97c
SM		 3731 NewOp(1101, logop, 1, LOGOP);
3732 logop->op_type = OP_COND_EXPR;
3733 logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
3734 logop->op_first = first;
3735 logop->op_flags = flags | OPf_KIDS;
3736 logop->op_private = 1 | (flags >> 8);
3737 logop->op_other = LINKLIST(trueop);
3738 logop->op_next = LINKLIST(falseop);
79072805 3739
79072805
LW		 3740
3741 /* establish postfix order */
1a67a97c
SM		 3742 start = LINKLIST(first);
3743 first->op_next = (OP*)logop;
79072805 3744
b1cb66bf 3745 first->op_sibling = trueop;
3746 trueop->op_sibling = falseop;
1a67a97c 3747 o = newUNOP(OP_NULL, 0, (OP*)logop);
79072805 3748
1a67a97c 3749 trueop->op_next = falseop->op_next = o;
79072805 3750
1a67a97c 3751 o->op_next = start;
11343788 3752 return o;
79072805
LW		 3753}
3754
3755OP *
864dbfa3 3756Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right)
79072805 3757{
b35b2403 3758 dTHR;
1a67a97c 3759 LOGOP *range;
79072805
LW		 3760 OP *flip;
3761 OP *flop;
1a67a97c 3762 OP *leftstart;
11343788 3763 OP *o;
79072805 3764
1a67a97c 3765 NewOp(1101, range, 1, LOGOP);
79072805 3766
1a67a97c
SM		 3767 range->op_type = OP_RANGE;
3768 range->op_ppaddr = PL_ppaddr[OP_RANGE];
3769 range->op_first = left;
3770 range->op_flags = OPf_KIDS;
3771 leftstart = LINKLIST(left);
3772 range->op_other = LINKLIST(right);
3773 range->op_private = 1 | (flags >> 8);
79072805
LW		 3774
3775 left->op_sibling = right;
3776
1a67a97c
SM		 3777 range->op_next = (OP*)range;
3778 flip = newUNOP(OP_FLIP, flags, (OP*)range);
79072805 3779 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3780 o = newUNOP(OP_NULL, 0, flop);
79072805 3781 linklist(flop);
1a67a97c 3782 range->op_next = leftstart;
79072805
LW		 3783
3784 left->op_next = flip;
3785 right->op_next = flop;
3786
1a67a97c
SM		 3787 range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
3788 sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV);
ed6116ce 3789 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3790 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3791
3792 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3793 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3794
11343788 3795 flip->op_next = o;
79072805 3796 if (!flip->op_private || !flop->op_private)
11343788 3797 linklist(o); /* blow off optimizer unless constant */
79072805 3798
11343788 3799 return o;
79072805
LW		 3800}
3801
3802OP *
864dbfa3 3803Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3804{
11343788 3805 dTHR;
463ee0b2 3806 OP* listop;
11343788 3807 OP* o;
463ee0b2 3808 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3809 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3810
463ee0b2
LW		 3811 if (expr) {
3812 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3813 return block; /* do {} while 0 does once */
fb73857a 3814 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3815 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3816 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3817 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3818 } else if (expr->op_flags & OPf_KIDS) {
3819 OP *k1 = ((UNOP*)expr)->op_first;
3820 OP *k2 = (k1) ? k1->op_sibling : NULL;
3821 switch (expr->op_type) {
1c846c1f 3822 case OP_NULL:
55d729e4
GS		 3823 if (k2 && k2->op_type == OP_READLINE
3824 && (k2->op_flags & OPf_STACKED)
1c846c1f 3825 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3826 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3827 break;
55d729e4
GS		 3828
3829 case OP_SASSIGN:
3830 if (k1->op_type == OP_READDIR
3831 || k1->op_type == OP_GLOB
72b16652 3832 || (k1->op_type == OP_NULL && k1->op_targ == OP_NULL)
55d729e4
GS		 3833 || k1->op_type == OP_EACH)
3834 expr = newUNOP(OP_DEFINED, 0, expr);
3835 break;
3836 }
774d564b 3837 }
463ee0b2 3838 }
93a17b20 3839
8990e307 3840 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3841 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3842
883ffac3
CS		 3843 if (listop)
3844 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3845
11343788
MB		 3846 if (once && o != listop)
3847 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3848
11343788
MB		 3849 if (o == listop)
3850 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3851
11343788
MB		 3852 o->op_flags |= flags;
3853 o = scope(o);
3854 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3855 return o;
79072805
LW		 3856}
3857
3858OP *
864dbfa3 3859Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3860{
11343788 3861 dTHR;
79072805
LW		 3862 OP *redo;
3863 OP *next = 0;
3864 OP *listop;
11343788 3865 OP *o;
79072805 3866 OP *condop;
1ba6ee2b 3867 U8 loopflags = 0;
79072805 3868
fb73857a 3869 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3870 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3871 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3872 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3873 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3874 OP *k1 = ((UNOP*)expr)->op_first;
3875 OP *k2 = (k1) ? k1->op_sibling : NULL;
3876 switch (expr->op_type) {
1c846c1f 3877 case OP_NULL:
55d729e4
GS		 3878 if (k2 && k2->op_type == OP_READLINE
3879 && (k2->op_flags & OPf_STACKED)
1c846c1f 3880 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
55d729e4 3881 expr = newUNOP(OP_DEFINED, 0, expr);
1c846c1f 3882 break;
55d729e4
GS		 3883
3884 case OP_SASSIGN:
3885 if (k1->op_type == OP_READDIR
3886 || k1->op_type == OP_GLOB
72b16652 3887 || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB)
55d729e4
GS		 3888 || k1->op_type == OP_EACH)
3889 expr = newUNOP(OP_DEFINED, 0, expr);
3890 break;
3891 }
748a9306 3892 }
79072805
LW		 3893
3894 if (!block)
3895 block = newOP(OP_NULL, 0);
87246558
GS		 3896 else if (cont) {
3897 block = scope(block);
3898 }
79072805 3899
1ba6ee2b 3900 if (cont) {
79072805 3901 next = LINKLIST(cont);
1ba6ee2b
GS		 3902 loopflags |= OPpLOOP_CONTINUE;
3903 }
fb73857a 3904 if (expr) {
85538317
GS		 3905 OP *unstack = newOP(OP_UNSTACK, 0);
3906 if (!next)
3907 next = unstack;
3908 cont = append_elem(OP_LINESEQ, cont, unstack);
fb73857a 3909 if ((line_t)whileline != NOLINE) {
3280af22 3910 PL_copline = whileline;
fb73857a 3911 cont = append_elem(OP_LINESEQ, cont,
3912 newSTATEOP(0, Nullch, Nullop));
3913 }
3914 }
79072805 3915
463ee0b2 3916 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3917 redo = LINKLIST(listop);
3918
3919 if (expr) {
3280af22 3920 PL_copline = whileline;
883ffac3
CS		 3921 scalar(listop);
3922 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3923 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3924 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3925 op_free((OP*)loop);
883ffac3 3926 return Nullop; /* listop already freed by new_logop */
463ee0b2 3927 }
883ffac3
CS		 3928 if (listop)
3929 ((LISTOP*)listop)->op_last->op_next = condop =
3930 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3931 }
3932 else
11343788 3933 o = listop;
79072805
LW		 3934
3935 if (!loop) {
b7dc083c 3936 NewOp(1101,loop,1,LOOP);
79072805 3937 loop->op_type = OP_ENTERLOOP;
22c35a8c 3938 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3939 loop->op_private = 0;
3940 loop->op_next = (OP*)loop;
3941 }
3942
11343788 3943 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3944
3945 loop->op_redoop = redo;
11343788 3946 loop->op_lastop = o;
1ba6ee2b 3947 o->op_private |= loopflags;
79072805
LW		 3948
3949 if (next)
3950 loop->op_nextop = next;
3951 else
11343788 3952 loop->op_nextop = o;
79072805 3953
11343788
MB		 3954 o->op_flags |= flags;
3955 o->op_private |= (flags >> 8);
3956 return o;
79072805
LW		 3957}
3958
3959OP *
864dbfa3 3960Perl_newFOROP(pTHX_ I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3961{
3962 LOOP *loop;
fb73857a 3963 OP *wop;
85e6fe83 3964 int padoff = 0;
4633a7c4 3965 I32 iterflags = 0;
79072805 3966
79072805 3967 if (sv) {
85e6fe83 3968 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3969 sv->op_type = OP_RV2GV;
22c35a8c 3970 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3971 }
85e6fe83
LW		 3972 else if (sv->op_type == OP_PADSV) { /* private variable */
3973 padoff = sv->op_targ;
743e66e6 3974 sv->op_targ = 0;
85e6fe83
LW		 3975 op_free(sv);
3976 sv = Nullop;
3977 }
54b9620d
MB		 3978 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3979 padoff = sv->op_targ;
743e66e6 3980 sv->op_targ = 0;
54b9620d
MB		 3981 iterflags |= OPf_SPECIAL;
3982 op_free(sv);
3983 sv = Nullop;
3984 }
79072805 3985 else
cea2e8a9 3986 Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3987 }
3988 else {
54b9620d
MB		 3989#ifdef USE_THREADS
3990 padoff = find_threadsv("_");
3991 iterflags |= OPf_SPECIAL;
3992#else
3280af22 3993 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3994#endif
79072805 3995 }
5f05dabc 3996 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3997 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3998 iterflags |= OPf_STACKED;
3999 }
89ea2908
GA		 4000 else if (expr->op_type == OP_NULL &&
4001 (expr->op_flags & OPf_KIDS) &&
4002 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
4003 {
4004 /* Basically turn for($x..$y) into the same as for($x,$y), but we
4005 * set the STACKED flag to indicate that these values are to be
4006 * treated as min/max values by 'pp_iterinit'.
4007 */
4008 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
1a67a97c 4009 LOGOP* range = (LOGOP*) flip->op_first;
89ea2908
GA		 4010 OP* left = range->op_first;
4011 OP* right = left->op_sibling;
5152d7c7 4012 LISTOP* listop;
89ea2908
GA		 4013
4014 range->op_flags &= ~OPf_KIDS;
4015 range->op_first = Nullop;
4016
5152d7c7 4017 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
1a67a97c
SM		 4018 listop->op_first->op_next = range->op_next;
4019 left->op_next = range->op_other;
5152d7c7
GS		 4020 right->op_next = (OP*)listop;
4021 listop->op_next = listop->op_first;
89ea2908
GA		 4022
4023 op_free(expr);
5152d7c7 4024 expr = (OP*)(listop);
89ea2908
GA		 4025 null(expr);
4026 iterflags |= OPf_STACKED;
4027 }
4028 else {
4029 expr = mod(force_list(expr), OP_GREPSTART);
4030 }
4031
4032
4633a7c4 4033 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 4034 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83 4035 assert(!loop->op_next);
b7dc083c 4036#ifdef PL_OP_SLAB_ALLOC
155aba94
GS		 4037 {
4038 LOOP *tmp;
4039 NewOp(1234,tmp,1,LOOP);
4040 Copy(loop,tmp,1,LOOP);
4041 loop = tmp;
4042 }
b7dc083c 4043#else
85e6fe83 4044 Renew(loop, 1, LOOP);
1c846c1f 4045#endif
85e6fe83 4046 loop->op_targ = padoff;
fb73857a 4047 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 4048 PL_copline = forline;
fb73857a 4049 return newSTATEOP(0, label, wop);
79072805
LW		 4050}
4051
8990e307 4052OP*
864dbfa3 4053Perl_newLOOPEX(pTHX_ I32 type, OP *label)
8990e307 4054{
11343788
MB		 4055 dTHR;
4056 OP *o;
2d8e6c8d
GS		 4057 STRLEN n_a;
4058
8990e307 4059 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 4060 /* "last()" means "last" */
4061 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
4062 o = newOP(type, OPf_SPECIAL);
4063 else {
4064 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2d8e6c8d 4065 ? SvPVx(((SVOP*)label)->op_sv, n_a)
cdaebead
MB		 4066 : ""));
4067 }
8990e307
LW		 4068 op_free(label);
4069 }
4070 else {
a0d0e21e
LW		 4071 if (label->op_type == OP_ENTERSUB)
4072 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 4073 o = newUNOP(type, OPf_STACKED, label);
8990e307 4074 }
3280af22 4075 PL_hints |= HINT_BLOCK_SCOPE;
11343788 4076 return o;
8990e307
LW		 4077}
4078
79072805 4079void
864dbfa3 4080Perl_cv_undef(pTHX_ CV *cv)
79072805 4081{
11343788
MB		 4082 dTHR;
4083#ifdef USE_THREADS
e858de61
MB		 4084 if (CvMUTEXP(cv)) {
4085 MUTEX_DESTROY(CvMUTEXP(cv));
4086 Safefree(CvMUTEXP(cv));
4087 CvMUTEXP(cv) = 0;
4088 }
11343788
MB		 4089#endif /* USE_THREADS */
4090
a0d0e21e 4091 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 4092#ifdef USE_THREADS
4093 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
cea2e8a9 4094 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4095#else
a0d0e21e 4096 if (CvDEPTH(cv))
cea2e8a9 4097 Perl_croak(aTHX_ "Can't undef active subroutine");
11343788 4098#endif /* USE_THREADS */
8990e307 4099 ENTER;
a0d0e21e 4100
7766f137 4101 SAVEVPTR(PL_curpad);
3280af22 4102 PL_curpad = 0;
a0d0e21e 4103
a5f75d66 4104 if (!CvCLONED(cv))
748a9306 4105 op_free(CvROOT(cv));
79072805 4106 CvROOT(cv) = Nullop;
8990e307 4107 LEAVE;
79072805 4108 }
1d5db326 4109 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 4110 CvFLAGS(cv) = 0;
8e07c86e
AD		 4111 SvREFCNT_dec(CvGV(cv));
4112 CvGV(cv) = Nullgv;
4113 SvREFCNT_dec(CvOUTSIDE(cv));
4114 CvOUTSIDE(cv) = Nullcv;
4115 if (CvPADLIST(cv)) {
8ebc5c01 4116 /* may be during global destruction */
4117 if (SvREFCNT(CvPADLIST(cv))) {
93965878 4118 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 4119 while (i >= 0) {
4120 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 4121 SV* sv = svp ? *svp : Nullsv;
4122 if (!sv)
4123 continue;
3280af22
NIS		 4124 if (sv == (SV*)PL_comppad_name)
4125 PL_comppad_name = Nullav;
4126 else if (sv == (SV*)PL_comppad) {
4127 PL_comppad = Nullav;
4128 PL_curpad = Null(SV**);
46fc3d4c 4129 }
4130 SvREFCNT_dec(sv);
8ebc5c01 4131 }
4132 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 4133 }
8e07c86e
AD		 4134 CvPADLIST(cv) = Nullav;
4135 }
79072805
LW		 4136}
4137
76e3520e 4138STATIC void
743e66e6 4139S_cv_dump(pTHX_ CV *cv)
5f05dabc 4140{
62fde642 4141#ifdef DEBUGGING
5f05dabc 4142 CV *outside = CvOUTSIDE(cv);
4143 AV* padlist = CvPADLIST(cv);
4fdae800 4144 AV* pad_name;
4145 AV* pad;
4146 SV** pname;
4147 SV** ppad;
5f05dabc 4148 I32 ix;
4149
b900a521
JH		 4150 PerlIO_printf(Perl_debug_log,
4151 "\tCV=0x%"UVxf" (%s), OUTSIDE=0x%"UVxf" (%s)\n",
4152 PTR2UV(cv),
ab50184a 4153 (CvANON(cv) ? "ANON"
6b88bc9c 4154 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 4155 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 4156 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
b900a521 4157 PTR2UV(outside),
ab50184a
CS		 4158 (!outside ? "null"
4159 : CvANON(outside) ? "ANON"
6b88bc9c 4160 : (outside == PL_main_cv) ? "MAIN"
07055b4c 4161 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 4162 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 4163
4fdae800 4164 if (!padlist)
4165 return;
4166
4167 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
4168 pad = (AV*)*av_fetch(padlist, 1, FALSE);
4169 pname = AvARRAY(pad_name);
4170 ppad = AvARRAY(pad);
4171
93965878 4172 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 4173 if (SvPOK(pname[ix]))
b900a521
JH		 4174 PerlIO_printf(Perl_debug_log,
4175 "\t%4d. 0x%"UVxf" (%s\"%s\" %"IVdf"-%"IVdf")\n",
894356b3 4176 (int)ix, PTR2UV(ppad[ix]),
4fdae800 4177 SvFAKE(pname[ix]) ? "FAKE " : "",
4178 SvPVX(pname[ix]),
b900a521
JH		 4179 (IV)I_32(SvNVX(pname[ix])),
4180 SvIVX(pname[ix]));
5f05dabc 4181 }
743e66e6 4182#endif /* DEBUGGING */
62fde642 4183}
5f05dabc 4184
76e3520e 4185STATIC CV *
cea2e8a9 4186S_cv_clone2(pTHX_ CV *proto, CV *outside)
748a9306 4187{
11343788 4188 dTHR;
748a9306
LW		 4189 AV* av;
4190 I32 ix;
4191 AV* protopadlist = CvPADLIST(proto);
4192 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
4193 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 4194 SV** pname = AvARRAY(protopad_name);
4195 SV** ppad = AvARRAY(protopad);
93965878
NIS		 4196 I32 fname = AvFILLp(protopad_name);
4197 I32 fpad = AvFILLp(protopad);
748a9306
LW		 4198 AV* comppadlist;
4199 CV* cv;
4200
07055b4c
CS		 4201 assert(!CvUNIQUE(proto));
4202
748a9306 4203 ENTER;
354992b1 4204 SAVECOMPPAD();
3280af22
NIS		 4205 SAVESPTR(PL_comppad_name);
4206 SAVESPTR(PL_compcv);
748a9306 4207
3280af22 4208 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 4209 sv_upgrade((SV *)cv, SvTYPE(proto));
a57ec3bd 4210 CvFLAGS(cv) = CvFLAGS(proto) & ~CVf_CLONE;
a5f75d66 4211 CvCLONED_on(cv);
748a9306 4212
11343788 4213#ifdef USE_THREADS
12ca11f6 4214 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4215 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4216 CvOWNER(cv) = 0;
4217#endif /* USE_THREADS */
57843af0 4218 CvFILE(cv) = CvFILE(proto);
44a8e56a 4219 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 4220 CvSTASH(cv) = CvSTASH(proto);
4221 CvROOT(cv) = CvROOT(proto);
4222 CvSTART(cv) = CvSTART(proto);
5f05dabc 4223 if (outside)
4224 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 4225
68dc0745 4226 if (SvPOK(proto))
4227 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
4228
3280af22 4229 PL_comppad_name = newAV();
46fc3d4c 4230 for (ix = fname; ix >= 0; ix--)
3280af22 4231 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 4232
3280af22 4233 PL_comppad = newAV();
748a9306
LW		 4234
4235 comppadlist = newAV();
4236 AvREAL_off(comppadlist);
3280af22
NIS		 4237 av_store(comppadlist, 0, (SV*)PL_comppad_name);
4238 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 4239 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 4240 av_fill(PL_comppad, AvFILLp(protopad));
4241 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 4242
4243 av = newAV(); /* will be @_ */
4244 av_extend(av, 0);
3280af22 4245 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 4246 AvFLAGS(av) = AVf_REIFY;
4247
9607fc9c 4248 for (ix = fpad; ix > 0; ix--) {
4249 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 4250 if (namesv && namesv != &PL_sv_undef) {
aa689395 4251 char *name = SvPVX(namesv); /* XXX */
4252 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
4253 I32 off = pad_findlex(name, ix, SvIVX(namesv),
2680586e 4254 CvOUTSIDE(cv), cxstack_ix, 0, 0);
5f05dabc 4255 if (!off)
3280af22 4256 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 4257 else if (off != ix)
cea2e8a9 4258 Perl_croak(aTHX_ "panic: cv_clone: %s", name);
748a9306
LW		 4259 }
4260 else { /* our own lexical */
aa689395 4261 SV* sv;
5f05dabc 4262 if (*name == '&') {
4263 /* anon code -- we'll come back for it */
4264 sv = SvREFCNT_inc(ppad[ix]);
4265 }
4266 else if (*name == '@')
4267 sv = (SV*)newAV();
748a9306 4268 else if (*name == '%')
5f05dabc 4269 sv = (SV*)newHV();
748a9306 4270 else
5f05dabc 4271 sv = NEWSV(0,0);
4272 if (!SvPADBUSY(sv))
4273 SvPADMY_on(sv);
3280af22 4274 PL_curpad[ix] = sv;
748a9306
LW		 4275 }
4276 }
7766f137 4277 else if (IS_PADGV(ppad[ix]) || IS_PADCONST(ppad[ix])) {
743e66e6
GS		 4278 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
4279 }
748a9306 4280 else {
aa689395 4281 SV* sv = NEWSV(0,0);
748a9306 4282 SvPADTMP_on(sv);
3280af22 4283 PL_curpad[ix] = sv;
748a9306
LW		 4284 }
4285 }
4286
5f05dabc 4287 /* Now that vars are all in place, clone nested closures. */
4288
9607fc9c 4289 for (ix = fpad; ix > 0; ix--) {
4290 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 4291 if (namesv
3280af22 4292 && namesv != &PL_sv_undef
aa689395 4293 && !(SvFLAGS(namesv) & SVf_FAKE)
4294 && *SvPVX(namesv) == '&'
5f05dabc 4295 && CvCLONE(ppad[ix]))
4296 {
4297 CV *kid = cv_clone2((CV*)ppad[ix], cv);
4298 SvREFCNT_dec(ppad[ix]);
4299 CvCLONE_on(kid);
4300 SvPADMY_on(kid);
3280af22 4301 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 4302 }
4303 }
4304
5f05dabc 4305#ifdef DEBUG_CLOSURES
ab50184a
CS		 4306 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
4307 cv_dump(outside);
4308 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 4309 cv_dump(proto);
ab50184a 4310 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 4311 cv_dump(cv);
4312#endif
4313
748a9306
LW		 4314 LEAVE;
4315 return cv;
4316}
4317
4318CV *
864dbfa3 4319Perl_cv_clone(pTHX_ CV *proto)
5f05dabc 4320{
b099ddc0 4321 CV *cv;
1feb2720 4322 LOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4323 cv = cv_clone2(proto, CvOUTSIDE(proto));
1feb2720 4324 UNLOCK_CRED_MUTEX; /* XXX create separate mutex */
b099ddc0 4325 return cv;
5f05dabc 4326}
4327
3fe9a6f1 4328void
864dbfa3 4329Perl_cv_ckproto(pTHX_ CV *cv, GV *gv, char *p)
3fe9a6f1 4330{
0453d815
PM		 4331 dTHR;
4332
e476b1b5 4333 if (((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) && ckWARN_d(WARN_PROTOTYPE)) {
46fc3d4c 4334 SV* msg = sv_newmortal();
3fe9a6f1 4335 SV* name = Nullsv;
4336
4337 if (gv)
46fc3d4c 4338 gv_efullname3(name = sv_newmortal(), gv, Nullch);
4339 sv_setpv(msg, "Prototype mismatch:");
4340 if (name)
894356b3 4341 Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, name);
3fe9a6f1 4342 if (SvPOK(cv))
cea2e8a9 4343 Perl_sv_catpvf(aTHX_ msg, " (%s)", SvPVX(cv));
46fc3d4c 4344 sv_catpv(msg, " vs ");
4345 if (p)
cea2e8a9 4346 Perl_sv_catpvf(aTHX_ msg, "(%s)", p);
46fc3d4c 4347 else
4348 sv_catpv(msg, "none");
e476b1b5 4349 Perl_warner(aTHX_ WARN_PROTOTYPE, "%"SVf, msg);
3fe9a6f1 4350 }
4351}
4352
760ac839 4353SV *
864dbfa3 4354Perl_cv_const_sv(pTHX_ CV *cv)
760ac839 4355{
54310121 4356 if (!cv || !SvPOK(cv) || SvCUR(cv))
4357 return Nullsv;
fe5e78ed
GS		 4358 return op_const_sv(CvSTART(cv), cv);
4359}
760ac839 4360
fe5e78ed 4361SV *
864dbfa3 4362Perl_op_const_sv(pTHX_ OP *o, CV *cv)
fe5e78ed
GS		 4363{
4364 SV *sv = Nullsv;
4365
0f79a09d 4366 if (!o)
fe5e78ed 4367 return Nullsv;
1c846c1f
NIS		 4368
4369 if (o->op_type == OP_LINESEQ && cLISTOPo->op_first)
fe5e78ed
GS		 4370 o = cLISTOPo->op_first->op_sibling;
4371
4372 for (; o; o = o->op_next) {
54310121 4373 OPCODE type = o->op_type;
fe5e78ed 4374
1c846c1f 4375 if (sv && o->op_next == o)
fe5e78ed 4376 return sv;
54310121 4377 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
4378 continue;
4379 if (type == OP_LEAVESUB || type == OP_RETURN)
4380 break;
4381 if (sv)
4382 return Nullsv;
7766f137 4383 if (type == OP_CONST && cSVOPo->op_sv)
5dc0d613 4384 sv = cSVOPo->op_sv;
7766f137 4385 else if ((type == OP_PADSV || type == OP_CONST) && cv) {
e858de61
MB		 4386 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
4387 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 4388 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 4389 return Nullsv;
760ac839 4390 }
54310121 4391 else
4392 return Nullsv;
760ac839 4393 }
5aabfad6 4394 if (sv)
4395 SvREADONLY_on(sv);
760ac839
LW		 4396 return sv;
4397}
4398
09bef843
SB		 4399void
4400Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4401{
4402 if (o)
4403 SAVEFREEOP(o);
4404 if (proto)
4405 SAVEFREEOP(proto);
4406 if (attrs)
4407 SAVEFREEOP(attrs);
4408 if (block)
4409 SAVEFREEOP(block);
4410 Perl_croak(aTHX_ "\"my sub\" not yet implemented");
4411}
4412
748a9306 4413CV *
864dbfa3 4414Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block)
79072805 4415{
09bef843
SB		 4416 return Perl_newATTRSUB(aTHX_ floor, o, proto, Nullop, block);
4417}
4418
4419CV *
4420Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block)
4421{
11343788 4422 dTHR;
2d8e6c8d 4423 STRLEN n_a;
83ee9e09
GS		 4424 char *name;
4425 char *aname;
4426 GV *gv;
2d8e6c8d 4427 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, n_a) : Nullch;
a2008d6d 4428 register CV *cv=0;
a0d0e21e 4429 I32 ix;
79072805 4430
83ee9e09
GS		 4431 name = o ? SvPVx(cSVOPo->op_sv, n_a) : Nullch;
4432 if (!name && PERLDB_NAMEANON && CopLINE(PL_curcop)) {
4433 SV *sv = sv_newmortal();
4434 Perl_sv_setpvf(aTHX_ sv, "__ANON__[%s:%"IVdf"]",
4435 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
4436 aname = SvPVX(sv);
4437 }
4438 else
4439 aname = Nullch;
4440 gv = gv_fetchpv(name ? name : (aname ? aname : "__ANON__"),
4441 GV_ADDMULTI | ((block || attrs) ? 0 : GV_NOINIT),
4442 SVt_PVCV);
4443
11343788 4444 if (o)
5dc0d613 4445 SAVEFREEOP(o);
3fe9a6f1 4446 if (proto)
4447 SAVEFREEOP(proto);
09bef843
SB		 4448 if (attrs)
4449 SAVEFREEOP(attrs);
3fe9a6f1 4450
09bef843 4451 if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at
55d729e4
GS		 4452 maximum a prototype before. */
4453 if (SvTYPE(gv) > SVt_NULL) {
0453d815 4454 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1)
e476b1b5 4455 && ckWARN_d(WARN_PROTOTYPE))
f248d071 4456 {
e476b1b5 4457 Perl_warner(aTHX_ WARN_PROTOTYPE, "Runaway prototype");
f248d071 4458 }
55d729e4
GS		 4459 cv_ckproto((CV*)gv, NULL, ps);
4460 }
4461 if (ps)
4462 sv_setpv((SV*)gv, ps);
4463 else
4464 sv_setiv((SV*)gv, -1);
3280af22
NIS		 4465 SvREFCNT_dec(PL_compcv);
4466 cv = PL_compcv = NULL;
4467 PL_sub_generation++;
55d729e4
GS		 4468 goto noblock;
4469 }
4470
68dc0745 4471 if (!name || GvCVGEN(gv))
4472 cv = Nullcv;
155aba94 4473 else if ((cv = GvCV(gv))) {
60ed1d8c
GS		 4474 bool exists = CvROOT(cv) || CvXSUB(cv);
4475 /* if the subroutine doesn't exist and wasn't pre-declared
4476 * with a prototype, assume it will be AUTOLOADed,
4477 * skipping the prototype check
4478 */
4479 if (exists || SvPOK(cv))
01ec43d0 4480 cv_ckproto(cv, gv, ps);
68dc0745 4481 /* already defined (or promised)? */
60ed1d8c 4482 if (exists || GvASSUMECV(gv)) {
68dc0745 4483 SV* const_sv;
fe5e78ed 4484 bool const_changed = TRUE;
09bef843 4485 if (!block && !attrs) {
aa689395 4486 /* just a "sub foo;" when &foo is already defined */
3280af22 4487 SAVEFREESV(PL_compcv);
aa689395 4488 goto done;
4489 }
7bac28a0 4490 /* ahem, death to those who redefine active sort subs */
3280af22 4491 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
cea2e8a9 4492 Perl_croak(aTHX_ "Can't redefine active sort subroutine %s", name);
09bef843
SB		 4493 if (!block)
4494 goto withattrs;
155aba94 4495 if ((const_sv = cv_const_sv(cv)))
fe5e78ed 4496 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
60ed1d8c 4497 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE))
83ee9e09 4498 {
57843af0
GS		 4499 line_t oldline = CopLINE(PL_curcop);
4500 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4501 Perl_warner(aTHX_ WARN_REDEFINE,
599cee73 4502 const_sv ? "Constant subroutine %s redefined"
09bef843 4503 : "Subroutine %s redefined", name);
57843af0 4504 CopLINE_set(PL_curcop, oldline);
79072805 4505 }
8990e307 4506 SvREFCNT_dec(cv);
68dc0745 4507 cv = Nullcv;
79072805
LW		 4508 }
4509 }
09bef843
SB		 4510 withattrs:
4511 if (attrs) {
4512 HV *stash;
4513 SV *rcv;
4514
4515 /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>
4516 * before we clobber PL_compcv.
4517 */
4518 if (cv && !block) {
4519 rcv = (SV*)cv;
4520 if (CvGV(cv) && GvSTASH(CvGV(cv)) && HvNAME(GvSTASH(CvGV(cv))))
4521 stash = GvSTASH(CvGV(cv));
4522 else if (CvSTASH(cv) && HvNAME(CvSTASH(cv)))
4523 stash = CvSTASH(cv);
4524 else
4525 stash = PL_curstash;
4526 }
4527 else {
4528 /* possibly about to re-define existing subr -- ignore old cv */
4529 rcv = (SV*)PL_compcv;
4530 if (name && GvSTASH(gv) && HvNAME(GvSTASH(gv)))
4531 stash = GvSTASH(gv);
4532 else
4533 stash = PL_curstash;
4534 }
4535 apply_attrs(stash, rcv, attrs);
4536 }
a0d0e21e 4537 if (cv) { /* must reuse cv if autoloaded */
09bef843
SB		 4538 if (!block) {
4539 /* got here with just attrs -- work done, so bug out */
4540 SAVEFREESV(PL_compcv);
4541 goto done;
4542 }
4633a7c4 4543 cv_undef(cv);
3280af22
NIS		 4544 CvFLAGS(cv) = CvFLAGS(PL_compcv);
4545 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
4546 CvOUTSIDE(PL_compcv) = 0;
4547 CvPADLIST(cv) = CvPADLIST(PL_compcv);
4548 CvPADLIST(PL_compcv) = 0;
4549 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
4550 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
4551 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 4552 }
4553 else {
3280af22 4554 cv = PL_compcv;
44a8e56a 4555 if (name) {
4556 GvCV(gv) = cv;
4557 GvCVGEN(gv) = 0;
3280af22 4558 PL_sub_generation++;
44a8e56a 4559 }
a0d0e21e 4560 }
44a8e56a 4561 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4562 CvFILE(cv) = CopFILE(PL_curcop);
3280af22 4563 CvSTASH(cv) = PL_curstash;
11343788
MB		 4564#ifdef USE_THREADS
4565 CvOWNER(cv) = 0;
1cfa4ec7 4566 if (!CvMUTEXP(cv)) {
f6aaf501 4567 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 4568 MUTEX_INIT(CvMUTEXP(cv));
4569 }
11343788 4570#endif /* USE_THREADS */
8990e307 4571
3fe9a6f1 4572 if (ps)
4573 sv_setpv((SV*)cv, ps);
4633a7c4 4574
3280af22 4575 if (PL_error_count) {
c07a80fd 4576 op_free(block);
4577 block = Nullop;
68dc0745 4578 if (name) {
4579 char *s = strrchr(name, ':');
4580 s = s ? s+1 : name;
6d4c2119
CS		 4581 if (strEQ(s, "BEGIN")) {
4582 char *not_safe =
4583 "BEGIN not safe after errors--compilation aborted";
faef0170 4584 if (PL_in_eval & EVAL_KEEPERR)
cea2e8a9 4585 Perl_croak(aTHX_ not_safe);
6d4c2119
CS		 4586 else {
4587 /* force display of errors found but not reported */
38a03e6e 4588 sv_catpv(ERRSV, not_safe);
cea2e8a9 4589 Perl_croak(aTHX_ "%s", SvPVx(ERRSV, n_a));
6d4c2119
CS		 4590 }
4591 }
68dc0745 4592 }
c07a80fd 4593 }
a0d0e21e 4594 if (!block) {
55d729e4 4595 noblock:
3280af22 4596 PL_copline = NOLINE;
a0d0e21e
LW		 4597 LEAVE_SCOPE(floor);
4598 return cv;
4599 }
4600
3280af22
NIS		 4601 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
4602 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 4603
7766f137
GS		 4604 if (CvLVALUE(cv)) {
4605 CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, scalarseq(block));
4606 }
4607 else {
4608 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
4609 }
4610 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4611 OpREFCNT_set(CvROOT(cv), 1);
4612 CvSTART(cv) = LINKLIST(CvROOT(cv));
4613 CvROOT(cv)->op_next = 0;
4614 peep(CvSTART(cv));
4615
4616 /* now that optimizer has done its work, adjust pad values */
54310121 4617 if (CvCLONE(cv)) {
3280af22
NIS		 4618 SV **namep = AvARRAY(PL_comppad_name);
4619 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 4620 SV *namesv;
4621
7766f137 4622 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4623 continue;
4624 /*
4625 * The only things that a clonable function needs in its
4626 * pad are references to outer lexicals and anonymous subs.
4627 * The rest are created anew during cloning.
4628 */
4629 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 4630 namesv != &PL_sv_undef &&
54310121 4631 (SvFAKE(namesv) ||
4632 *SvPVX(namesv) == '&')))
4633 {
3280af22
NIS		 4634 SvREFCNT_dec(PL_curpad[ix]);
4635 PL_curpad[ix] = Nullsv;
54310121 4636 }
4637 }
a0d0e21e 4638 }
54310121 4639 else {
4640 AV *av = newAV(); /* Will be @_ */
4641 av_extend(av, 0);
3280af22 4642 av_store(PL_comppad, 0, (SV*)av);
54310121 4643 AvFLAGS(av) = AVf_REIFY;
79072805 4644
3280af22 4645 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
7766f137 4646 if (SvIMMORTAL(PL_curpad[ix]) || IS_PADGV(PL_curpad[ix]) || IS_PADCONST(PL_curpad[ix]))
54310121 4647 continue;
3280af22
NIS		 4648 if (!SvPADMY(PL_curpad[ix]))
4649 SvPADTMP_on(PL_curpad[ix]);
54310121 4650 }
4651 }
79072805 4652
83ee9e09 4653 if (name || aname) {
44a8e56a 4654 char *s;
83ee9e09 4655 char *tname = (name ? name : aname);
44a8e56a 4656
3280af22 4657 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 4658 SV *sv = NEWSV(0,0);
44a8e56a 4659 SV *tmpstr = sv_newmortal();
549bb64a 4660 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
83ee9e09 4661 CV *pcv;
44a8e56a 4662 HV *hv;
4663
ed094faf
GS		 4664 Perl_sv_setpvf(aTHX_ sv, "%s:%ld-%ld",
4665 CopFILE(PL_curcop),
cc49e20b 4666 (long)PL_subline, (long)CopLINE(PL_curcop));
44a8e56a 4667 gv_efullname3(tmpstr, gv, Nullch);
3280af22 4668 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 4669 hv = GvHVn(db_postponed);
9607fc9c 4670 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
83ee9e09
GS		 4671 && (pcv = GvCV(db_postponed)))
4672 {
44a8e56a 4673 dSP;
924508f0 4674 PUSHMARK(SP);
44a8e56a 4675 XPUSHs(tmpstr);
4676 PUTBACK;
83ee9e09 4677 call_sv((SV*)pcv, G_DISCARD);
44a8e56a 4678 }
4679 }
79072805 4680
83ee9e09 4681 if ((s = strrchr(tname,':')))
28757baa 4682 s++;
4683 else
83ee9e09 4684 s = tname;
ed094faf 4685
7d30b5c4 4686 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4687 goto done;
4688
68dc0745 4689 if (strEQ(s, "BEGIN")) {
3280af22 4690 I32 oldscope = PL_scopestack_ix;
28757baa 4691 ENTER;
57843af0
GS		 4692 SAVECOPFILE(&PL_compiling);
4693 SAVECOPLINE(&PL_compiling);
3280af22
NIS		 4694 save_svref(&PL_rs);
4695 sv_setsv(PL_rs, PL_nrs);
28757baa 4696
3280af22
NIS		 4697 if (!PL_beginav)
4698 PL_beginav = newAV();
28757baa 4699 DEBUG_x( dump_sub(gv) );
ea2f84a3
GS		 4700 av_push(PL_beginav, (SV*)cv);
4701 GvCV(gv) = 0; /* cv has been hijacked */
3280af22 4702 call_list(oldscope, PL_beginav);
a6006777 4703
3280af22 4704 PL_curcop = &PL_compiling;
a0ed51b3 4705 PL_compiling.op_private = PL_hints;
28757baa 4706 LEAVE;
4707 }
3280af22
NIS		 4708 else if (strEQ(s, "END") && !PL_error_count) {
4709 if (!PL_endav)
4710 PL_endav = newAV();
ed094faf 4711 DEBUG_x( dump_sub(gv) );
3280af22 4712 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4713 av_store(PL_endav, 0, (SV*)cv);
4714 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4715 }
7d30b5c4
GS		 4716 else if (strEQ(s, "CHECK") && !PL_error_count) {
4717 if (!PL_checkav)
4718 PL_checkav = newAV();
ed094faf 4719 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4720 if (PL_main_start && ckWARN(WARN_VOID))
4721 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4722 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4723 av_store(PL_checkav, 0, (SV*)cv);
4724 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4725 }
3280af22
NIS		 4726 else if (strEQ(s, "INIT") && !PL_error_count) {
4727 if (!PL_initav)
4728 PL_initav = newAV();
ed094faf 4729 DEBUG_x( dump_sub(gv) );
ddda08b7
GS		 4730 if (PL_main_start && ckWARN(WARN_VOID))
4731 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4732 av_push(PL_initav, (SV*)cv);
4733 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4734 }
79072805 4735 }
a6006777 4736
aa689395 4737 done:
3280af22 4738 PL_copline = NOLINE;
8990e307 4739 LEAVE_SCOPE(floor);
a0d0e21e 4740 return cv;
79072805
LW		 4741}
4742
b099ddc0 4743/* XXX unsafe for threads if eval_owner isn't held */
954c1994
GS		 4744/*
4745=for apidoc newCONSTSUB
4746
4747Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is
4748eligible for inlining at compile-time.
4749
4750=cut
4751*/
4752
5476c433 4753void
864dbfa3 4754Perl_newCONSTSUB(pTHX_ HV *stash, char *name, SV *sv)
5476c433
JD		 4755{
4756 dTHR;
5476c433 4757
11faa288 4758 ENTER;
11faa288 4759
f4dd75d9 4760 SAVECOPLINE(PL_curcop);
11faa288 4761 CopLINE_set(PL_curcop, PL_copline);
f4dd75d9
GS		 4762
4763 SAVEHINTS();
3280af22 4764 PL_hints &= ~HINT_BLOCK_SCOPE;
11faa288
GS		 4765
4766 if (stash) {
4767 SAVESPTR(PL_curstash);
4768 SAVECOPSTASH(PL_curcop);
4769 PL_curstash = stash;
4770#ifdef USE_ITHREADS
4771 CopSTASHPV(PL_curcop) = stash ? HvNAME(stash) : Nullch;
4772#else
4773 CopSTASH(PL_curcop) = stash;
4774#endif
4775 }
5476c433 4776
09bef843 4777 newATTRSUB(
be24f278 4778 start_subparse(FALSE, 0),
5476c433 4779 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4780 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
09bef843 4781 Nullop,
5476c433
JD		 4782 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4783 );
4784
11faa288 4785 LEAVE;
5476c433
JD		 4786}
4787
954c1994
GS		 4788/*
4789=for apidoc U||newXS
4790
4791Used by C<xsubpp> to hook up XSUBs as Perl subs.
4792
4793=cut
4794*/
4795
57d3b86d 4796CV *
864dbfa3 4797Perl_newXS(pTHX_ char *name, XSUBADDR_t subaddr, char *filename)
a0d0e21e 4798{
11343788 4799 dTHR;
44a8e56a 4800 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4801 register CV *cv;
44a8e56a 4802
155aba94 4803 if ((cv = (name ? GvCV(gv) : Nullcv))) {
44a8e56a 4804 if (GvCVGEN(gv)) {
4805 /* just a cached method */
4806 SvREFCNT_dec(cv);
4807 cv = 0;
4808 }
4809 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4810 /* already defined (or promised) */
599cee73 4811 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4812 && HvNAME(GvSTASH(CvGV(cv)))
4813 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
57843af0 4814 line_t oldline = CopLINE(PL_curcop);
51f6edd3 4815 if (PL_copline != NOLINE)
57843af0 4816 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4817 Perl_warner(aTHX_ WARN_REDEFINE, "Subroutine %s redefined",name);
57843af0 4818 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 4819 }
4820 SvREFCNT_dec(cv);
4821 cv = 0;
79072805 4822 }
79072805 4823 }
44a8e56a 4824
4825 if (cv) /* must reuse cv if autoloaded */
4826 cv_undef(cv);
a0d0e21e
LW		 4827 else {
4828 cv = (CV*)NEWSV(1105,0);
4829 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4830 if (name) {
4831 GvCV(gv) = cv;
4832 GvCVGEN(gv) = 0;
3280af22 4833 PL_sub_generation++;
44a8e56a 4834 }
a0d0e21e 4835 }
5196be3e 4836 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4837#ifdef USE_THREADS
12ca11f6 4838 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4839 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4840 CvOWNER(cv) = 0;
4841#endif /* USE_THREADS */
b195d487 4842 (void)gv_fetchfile(filename);
57843af0
GS		 4843 CvFILE(cv) = filename; /* NOTE: not copied, as it is expected to be
4844 an external constant string */
a0d0e21e 4845 CvXSUB(cv) = subaddr;
44a8e56a 4846
28757baa 4847 if (name) {
4848 char *s = strrchr(name,':');
4849 if (s)
4850 s++;
4851 else
4852 s = name;
ed094faf 4853
7d30b5c4 4854 if (*s != 'B' && *s != 'E' && *s != 'C' && *s != 'I')
ed094faf
GS		 4855 goto done;
4856
28757baa 4857 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4858 if (!PL_beginav)
4859 PL_beginav = newAV();
ea2f84a3
GS		 4860 av_push(PL_beginav, (SV*)cv);
4861 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4862 }
4863 else if (strEQ(s, "END")) {
3280af22
NIS		 4864 if (!PL_endav)
4865 PL_endav = newAV();
4866 av_unshift(PL_endav, 1);
ea2f84a3
GS		 4867 av_store(PL_endav, 0, (SV*)cv);
4868 GvCV(gv) = 0; /* cv has been hijacked */
28757baa 4869 }
7d30b5c4
GS		 4870 else if (strEQ(s, "CHECK")) {
4871 if (!PL_checkav)
4872 PL_checkav = newAV();
ddda08b7
GS		 4873 if (PL_main_start && ckWARN(WARN_VOID))
4874 Perl_warner(aTHX_ WARN_VOID, "Too late to run CHECK block");
7d30b5c4 4875 av_unshift(PL_checkav, 1);
ea2f84a3
GS		 4876 av_store(PL_checkav, 0, (SV*)cv);
4877 GvCV(gv) = 0; /* cv has been hijacked */
4f25aa18 4878 }
7d07dbc2 4879 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4880 if (!PL_initav)
4881 PL_initav = newAV();
ddda08b7
GS		 4882 if (PL_main_start && ckWARN(WARN_VOID))
4883 Perl_warner(aTHX_ WARN_VOID, "Too late to run INIT block");
ea2f84a3
GS		 4884 av_push(PL_initav, (SV*)cv);
4885 GvCV(gv) = 0; /* cv has been hijacked */
ae77835f 4886 }
28757baa 4887 }
8990e307 4888 else
a5f75d66 4889 CvANON_on(cv);
44a8e56a 4890
ed094faf 4891done:
a0d0e21e 4892 return cv;
79072805
LW		 4893}
4894
4895void
864dbfa3 4896Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block)
79072805 4897{
11343788 4898 dTHR;
79072805
LW		 4899 register CV *cv;
4900 char *name;
4901 GV *gv;
a0d0e21e 4902 I32 ix;
2d8e6c8d 4903 STRLEN n_a;
79072805 4904
11343788 4905 if (o)
2d8e6c8d 4906 name = SvPVx(cSVOPo->op_sv, n_a);
79072805
LW		 4907 else
4908 name = "STDOUT";
85e6fe83 4909 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4910 GvMULTI_on(gv);
155aba94 4911 if ((cv = GvFORM(gv))) {
599cee73 4912 if (ckWARN(WARN_REDEFINE)) {
57843af0 4913 line_t oldline = CopLINE(PL_curcop);
79072805 4914
57843af0 4915 CopLINE_set(PL_curcop, PL_copline);
cea2e8a9 4916 Perl_warner(aTHX_ WARN_REDEFINE, "Format %s redefined",name);
57843af0 4917 CopLINE_set(PL_curcop, oldline);
79072805 4918 }
8990e307 4919 SvREFCNT_dec(cv);
79072805 4920 }
3280af22 4921 cv = PL_compcv;
79072805 4922 GvFORM(gv) = cv;
44a8e56a 4923 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
57843af0 4924 CvFILE(cv) = CopFILE(PL_curcop);
79072805 4925
3280af22
NIS		 4926 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4927 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4928 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4929 }
4930
79072805 4931 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
7934575e
GS		 4932 CvROOT(cv)->op_private |= OPpREFCOUNTED;
4933 OpREFCNT_set(CvROOT(cv), 1);
79072805
LW		 4934 CvSTART(cv) = LINKLIST(CvROOT(cv));
4935 CvROOT(cv)->op_next = 0;
4936 peep(CvSTART(cv));
11343788 4937 op_free(o);
3280af22 4938 PL_copline = NOLINE;
8990e307 4939 LEAVE_SCOPE(floor);
79072805
LW		 4940}
4941
4942OP *
864dbfa3 4943Perl_newANONLIST(pTHX_ OP *o)
79072805 4944{
93a17b20 4945 return newUNOP(OP_REFGEN, 0,
11343788 4946 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4947}
4948
4949OP *
864dbfa3 4950Perl_newANONHASH(pTHX_ OP *o)
79072805 4951{
93a17b20 4952 return newUNOP(OP_REFGEN, 0,
11343788 4953 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4954}
4955
4956OP *
864dbfa3 4957Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block)
a0d0e21e 4958{
09bef843
SB		 4959 return newANONATTRSUB(floor, proto, Nullop, block);
4960}
4961
4962OP *
4963Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block)
4964{
a0d0e21e 4965 return newUNOP(OP_REFGEN, 0,
09bef843
SB		 4966 newSVOP(OP_ANONCODE, 0,
4967 (SV*)newATTRSUB(floor, 0, proto, attrs, block)));
79072805
LW		 4968}
4969
4970OP *
864dbfa3 4971Perl_oopsAV(pTHX_ OP *o)
79072805 4972{
ed6116ce
LW		 4973 switch (o->op_type) {
4974 case OP_PADSV:
4975 o->op_type = OP_PADAV;
22c35a8c 4976 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4977 return ref(o, OP_RV2AV);
ed6116ce
LW		 4978
4979 case OP_RV2SV:
79072805 4980 o->op_type = OP_RV2AV;
22c35a8c 4981 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4982 ref(o, OP_RV2AV);
ed6116ce
LW		 4983 break;
4984
4985 default:
0453d815
PM		 4986 if (ckWARN_d(WARN_INTERNAL))
4987 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsAV");
ed6116ce
LW		 4988 break;
4989 }
79072805
LW		 4990 return o;
4991}
4992
4993OP *
864dbfa3 4994Perl_oopsHV(pTHX_ OP *o)
79072805 4995{
0453d815 4996 dTHR;
1c846c1f 4997
ed6116ce
LW		 4998 switch (o->op_type) {
4999 case OP_PADSV:
5000 case OP_PADAV:
5001 o->op_type = OP_PADHV;
22c35a8c 5002 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 5003 return ref(o, OP_RV2HV);
ed6116ce
LW		 5004
5005 case OP_RV2SV:
5006 case OP_RV2AV:
79072805 5007 o->op_type = OP_RV2HV;
22c35a8c 5008 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 5009 ref(o, OP_RV2HV);
ed6116ce
LW		 5010 break;
5011
5012 default:
0453d815
PM		 5013 if (ckWARN_d(WARN_INTERNAL))
5014 Perl_warner(aTHX_ WARN_INTERNAL, "oops: oopsHV");
ed6116ce
LW		 5015 break;
5016 }
79072805
LW		 5017 return o;
5018}
5019
5020OP *
864dbfa3 5021Perl_newAVREF(pTHX_ OP *o)
79072805 5022{
ed6116ce
LW		 5023 if (o->op_type == OP_PADANY) {
5024 o->op_type = OP_PADAV;
22c35a8c 5025 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 5026 return o;
ed6116ce 5027 }
79072805
LW		 5028 return newUNOP(OP_RV2AV, 0, scalar(o));
5029}
5030
5031OP *
864dbfa3 5032Perl_newGVREF(pTHX_ I32 type, OP *o)
79072805 5033{
82092f1d 5034 if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT)
a0d0e21e 5035 return newUNOP(OP_NULL, 0, o);
748a9306 5036 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 5037}
5038
5039OP *
864dbfa3 5040Perl_newHVREF(pTHX_ OP *o)
79072805 5041{
ed6116ce
LW		 5042 if (o->op_type == OP_PADANY) {
5043 o->op_type = OP_PADHV;
22c35a8c 5044 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 5045 return o;
ed6116ce 5046 }
79072805
LW		 5047 return newUNOP(OP_RV2HV, 0, scalar(o));
5048}
5049
5050OP *
864dbfa3 5051Perl_oopsCV(pTHX_ OP *o)
79072805 5052{
cea2e8a9 5053 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805
LW		 5054 /* STUB */
5055 return o;
5056}
5057
5058OP *
864dbfa3 5059Perl_newCVREF(pTHX_ I32 flags, OP *o)
79072805 5060{
c07a80fd 5061 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 5062}
5063
5064OP *
864dbfa3 5065Perl_newSVREF(pTHX_ OP *o)
79072805 5066{
ed6116ce
LW		 5067 if (o->op_type == OP_PADANY) {
5068 o->op_type = OP_PADSV;
22c35a8c 5069 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 5070 return o;
ed6116ce 5071 }
224a4551
MB		 5072 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
5073 o->op_flags |= OPpDONE_SVREF;
a863c7d1 5074 return o;
224a4551 5075 }
79072805
LW		 5076 return newUNOP(OP_RV2SV, 0, scalar(o));
5077}
5078
5079/* Check routines. */
5080
5081OP *
cea2e8a9 5082Perl_ck_anoncode(pTHX_ OP *o)
5f05dabc 5083{
178c6305
CS		 5084 PADOFFSET ix;
5085 SV* name;
5086
5087 name = NEWSV(1106,0);
5088 sv_upgrade(name, SVt_PVNV);
5089 sv_setpvn(name, "&", 1);
5090 SvIVX(name) = -1;
5091 SvNVX(name) = 1;
5dc0d613 5092 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 5093 av_store(PL_comppad_name, ix, name);
5094 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 5095 SvPADMY_on(cSVOPo->op_sv);
5096 cSVOPo->op_sv = Nullsv;
5097 cSVOPo->op_targ = ix;
5098 return o;
5f05dabc 5099}
5100
5101OP *
cea2e8a9 5102Perl_ck_bitop(pTHX_ OP *o)
55497cff 5103{
3280af22 5104 o->op_private = PL_hints;
5dc0d613 5105 return o;
55497cff 5106}
5107
5108OP *
cea2e8a9 5109Perl_ck_concat(pTHX_ OP *o)
79072805 5110{
11343788
MB		 5111 if (cUNOPo->op_first->op_type == OP_CONCAT)
5112 o->op_flags |= OPf_STACKED;
5113 return o;
79072805
LW		 5114}
5115
5116OP *
cea2e8a9 5117Perl_ck_spair(pTHX_ OP *o)
79072805 5118{
11343788 5119 if (o->op_flags & OPf_KIDS) {
79072805 5120 OP* newop;
a0d0e21e 5121 OP* kid;
5dc0d613
MB		 5122 OPCODE type = o->op_type;
5123 o = modkids(ck_fun(o), type);
11343788 5124 kid = cUNOPo->op_first;
a0d0e21e
LW		 5125 newop = kUNOP->op_first->op_sibling;
5126 if (newop &&
5127 (newop->op_sibling ||
22c35a8c 5128 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 5129 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
5130 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 5131
11343788 5132 return o;
a0d0e21e
LW		 5133 }
5134 op_free(kUNOP->op_first);
5135 kUNOP->op_first = newop;
5136 }
22c35a8c 5137 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 5138 return ck_fun(o);
a0d0e21e
LW		 5139}
5140
5141OP *
cea2e8a9 5142Perl_ck_delete(pTHX_ OP *o)
a0d0e21e 5143{
11343788 5144 o = ck_fun(o);
5dc0d613 5145 o->op_private = 0;
11343788
MB		 5146 if (o->op_flags & OPf_KIDS) {
5147 OP *kid = cUNOPo->op_first;
01020589
GS		 5148 switch (kid->op_type) {
5149 case OP_ASLICE:
5150 o->op_flags |= OPf_SPECIAL;
5151 /* FALL THROUGH */
5152 case OP_HSLICE:
5dc0d613 5153 o->op_private |= OPpSLICE;
01020589
GS		 5154 break;
5155 case OP_AELEM:
5156 o->op_flags |= OPf_SPECIAL;
5157 /* FALL THROUGH */
5158 case OP_HELEM:
5159 break;
5160 default:
5161 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice",
22c35a8c 5162 PL_op_desc[o->op_type]);
01020589 5163 }
a0d0e21e 5164 null(kid);
79072805 5165 }
11343788 5166 return o;
79072805
LW		 5167}
5168
5169OP *
cea2e8a9 5170Perl_ck_eof(pTHX_ OP *o)
79072805 5171{
11343788 5172 I32 type = o->op_type;
79072805 5173
11343788
MB		 5174 if (o->op_flags & OPf_KIDS) {
5175 if (cLISTOPo->op_first->op_type == OP_STUB) {
5176 op_free(o);
5177 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 5178 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 5179 }
11343788 5180 return ck_fun(o);
79072805 5181 }
11343788 5182 return o;
79072805
LW		 5183}
5184
5185OP *
cea2e8a9 5186Perl_ck_eval(pTHX_ OP *o)
79072805 5187{
3280af22 5188 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 5189 if (o->op_flags & OPf_KIDS) {
5190 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5191
93a17b20 5192 if (!kid) {
11343788
MB		 5193 o->op_flags &= ~OPf_KIDS;
5194 null(o);
79072805
LW		 5195 }
5196 else if (kid->op_type == OP_LINESEQ) {
5197 LOGOP *enter;
5198
11343788
MB		 5199 kid->op_next = o->op_next;
5200 cUNOPo->op_first = 0;
5201 op_free(o);
79072805 5202
b7dc083c 5203 NewOp(1101, enter, 1, LOGOP);
79072805 5204 enter->op_type = OP_ENTERTRY;
22c35a8c 5205 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 5206 enter->op_private = 0;
5207
5208 /* establish postfix order */
5209 enter->op_next = (OP*)enter;
5210
11343788
MB		 5211 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
5212 o->op_type = OP_LEAVETRY;
22c35a8c 5213 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 5214 enter->op_other = o;
5215 return o;
79072805 5216 }
c7cc6f1c 5217 else
473986ff 5218 scalar((OP*)kid);
79072805
LW		 5219 }
5220 else {
11343788 5221 op_free(o);
54b9620d 5222 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 5223 }
3280af22 5224 o->op_targ = (PADOFFSET)PL_hints;
11343788 5225 return o;
79072805
LW		 5226}
5227
5228OP *
d98f61e7
GS		 5229Perl_ck_exit(pTHX_ OP *o)
5230{
5231#ifdef VMS
5232 HV *table = GvHV(PL_hintgv);
5233 if (table) {
5234 SV **svp = hv_fetch(table, "vmsish_exit", 11, FALSE);
5235 if (svp && *svp && SvTRUE(*svp))
5236 o->op_private |= OPpEXIT_VMSISH;
5237 }
5238#endif
5239 return ck_fun(o);
5240}
5241
5242OP *
cea2e8a9 5243Perl_ck_exec(pTHX_ OP *o)
79072805
LW		 5244{
5245 OP *kid;
11343788
MB		 5246 if (o->op_flags & OPf_STACKED) {
5247 o = ck_fun(o);
5248 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 5249 if (kid->op_type == OP_RV2GV)
5250 null(kid);
79072805 5251 }
463ee0b2 5252 else
11343788
MB		 5253 o = listkids(o);
5254 return o;
79072805
LW		 5255}
5256
5257OP *
cea2e8a9 5258Perl_ck_exists(pTHX_ OP *o)
5f05dabc 5259{
5196be3e
MB		 5260 o = ck_fun(o);
5261 if (o->op_flags & OPf_KIDS) {
5262 OP *kid = cUNOPo->op_first;
afebc493
GS		 5263 if (kid->op_type == OP_ENTERSUB) {
5264 (void) ref(kid, o->op_type);
5265 if (kid->op_type != OP_RV2CV && !PL_error_count)
5266 Perl_croak(aTHX_ "%s argument is not a subroutine name",
5267 PL_op_desc[o->op_type]);
5268 o->op_private |= OPpEXISTS_SUB;
5269 }
5270 else if (kid->op_type == OP_AELEM)
01020589
GS		 5271 o->op_flags |= OPf_SPECIAL;
5272 else if (kid->op_type != OP_HELEM)
5273 Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element",
5274 PL_op_desc[o->op_type]);
5f05dabc 5275 null(kid);
5276 }
5196be3e 5277 return o;
5f05dabc 5278}
5279
22c35a8c 5280#if 0
5f05dabc 5281OP *
cea2e8a9 5282Perl_ck_gvconst(pTHX_ register OP *o)
79072805
LW		 5283{
5284 o = fold_constants(o);
5285 if (o->op_type == OP_CONST)
5286 o->op_type = OP_GV;
5287 return o;
5288}
22c35a8c 5289#endif
79072805
LW		 5290
5291OP *
cea2e8a9 5292Perl_ck_rvconst(pTHX_ register OP *o)
79072805 5293{
11343788
MB		 5294 dTHR;
5295 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 5296
3280af22 5297 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 5298 if (kid->op_type == OP_CONST) {
44a8e56a 5299 char *name;
5300 int iscv;
5301 GV *gv;
779c5bc9 5302 SV *kidsv = kid->op_sv;
2d8e6c8d 5303 STRLEN n_a;
44a8e56a 5304
779c5bc9
GS		 5305 /* Is it a constant from cv_const_sv()? */
5306 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
5307 SV *rsv = SvRV(kidsv);
5308 int svtype = SvTYPE(rsv);
5309 char *badtype = Nullch;
5310
5311 switch (o->op_type) {
5312 case OP_RV2SV:
5313 if (svtype > SVt_PVMG)
5314 badtype = "a SCALAR";
5315 break;
5316 case OP_RV2AV:
5317 if (svtype != SVt_PVAV)
5318 badtype = "an ARRAY";
5319 break;
5320 case OP_RV2HV:
5321 if (svtype != SVt_PVHV) {
5322 if (svtype == SVt_PVAV) { /* pseudohash? */
5323 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
5324 if (ksv && SvROK(*ksv)
5325 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
5326 {
5327 break;
5328 }
5329 }
5330 badtype = "a HASH";
5331 }
5332 break;
5333 case OP_RV2CV:
5334 if (svtype != SVt_PVCV)
5335 badtype = "a CODE";
5336 break;
5337 }
5338 if (badtype)
cea2e8a9 5339 Perl_croak(aTHX_ "Constant is not %s reference", badtype);
779c5bc9
GS		 5340 return o;
5341 }
2d8e6c8d 5342 name = SvPV(kidsv, n_a);
3280af22 5343 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 5344 char *badthing = Nullch;
5dc0d613 5345 switch (o->op_type) {
44a8e56a 5346 case OP_RV2SV:
5347 badthing = "a SCALAR";
5348 break;
5349 case OP_RV2AV:
5350 badthing = "an ARRAY";
5351 break;
5352 case OP_RV2HV:
5353 badthing = "a HASH";
5354 break;
5355 }
5356 if (badthing)
1c846c1f 5357 Perl_croak(aTHX_
44a8e56a 5358 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
5359 name, badthing);
5360 }
93233ece
CS		 5361 /*
5362 * This is a little tricky. We only want to add the symbol if we
5363 * didn't add it in the lexer. Otherwise we get duplicate strict
5364 * warnings. But if we didn't add it in the lexer, we must at
5365 * least pretend like we wanted to add it even if it existed before,
5366 * or we get possible typo warnings. OPpCONST_ENTERED says
5367 * whether the lexer already added THIS instance of this symbol.
5368 */
5196be3e 5369 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 5370 do {
44a8e56a 5371 gv = gv_fetchpv(name,
748a9306 5372 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 5373 iscv
5374 ? SVt_PVCV
11343788 5375 : o->op_type == OP_RV2SV
a0d0e21e 5376 ? SVt_PV
11343788 5377 : o->op_type == OP_RV2AV
a0d0e21e 5378 ? SVt_PVAV
11343788 5379 : o->op_type == OP_RV2HV
a0d0e21e
LW		 5380 ? SVt_PVHV
5381 : SVt_PVGV);
93233ece
CS		 5382 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
5383 if (gv) {
5384 kid->op_type = OP_GV;
5385 SvREFCNT_dec(kid->op_sv);
350de78d 5386#ifdef USE_ITHREADS
638eceb6 5387 /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */
350de78d 5388 kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP);
63caf608 5389 SvREFCNT_dec(PL_curpad[kPADOP->op_padix]);
743e66e6 5390 GvIN_PAD_on(gv);
350de78d
GS		 5391 PL_curpad[kPADOP->op_padix] = SvREFCNT_inc(gv);
5392#else
93233ece 5393 kid->op_sv = SvREFCNT_inc(gv);
350de78d 5394#endif
76cd736e 5395 kid->op_ppaddr = PL_ppaddr[OP_GV];
a0d0e21e 5396 }
79072805 5397 }
11343788 5398 return o;
79072805
LW		 5399}
5400
5401OP *
cea2e8a9 5402Perl_ck_ftst(pTHX_ OP *o)
79072805 5403{
11343788
MB		 5404 dTHR;
5405 I32 type = o->op_type;
79072805 5406
d0dca557
JD		 5407 if (o->op_flags & OPf_REF) {
5408 /* nothing */
5409 }
5410 else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 5411 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 5412
5413 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
2d8e6c8d 5414 STRLEN n_a;
a0d0e21e 5415 OP *newop = newGVOP(type, OPf_REF,
2d8e6c8d 5416 gv_fetchpv(SvPVx(kid->op_sv, n_a), TRUE, SVt_PVIO));
11343788 5417 op_free(o);
d0dca557 5418 o = newop;
79072805
LW		 5419 }
5420 }
5421 else {
11343788 5422 op_free(o);
79072805 5423 if (type == OP_FTTTY)
d0dca557 5424 o = newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 5425 SVt_PVIO));
79072805 5426 else
d0dca557 5427 o = newUNOP(type, 0, newDEFSVOP());
79072805 5428 }
d0dca557
JD		 5429#ifdef USE_LOCALE
5430 if (type == OP_FTTEXT || type == OP_FTBINARY) {
5431 o->op_private = 0;
5432 if (PL_hints & HINT_LOCALE)
5433 o->op_private |= OPpLOCALE;
5434 }
5435#endif
11343788 5436 return o;
79072805
LW		 5437}
5438
5439OP *
cea2e8a9 5440Perl_ck_fun(pTHX_ OP *o)
79072805 5441{
11343788 5442 dTHR;
79072805
LW		 5443 register OP *kid;
5444 OP **tokid;
5445 OP *sibl;
5446 I32 numargs = 0;
11343788 5447 int type = o->op_type;
22c35a8c 5448 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 5449
11343788 5450 if (o->op_flags & OPf_STACKED) {
79072805
LW		 5451 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
5452 oa &= ~OA_OPTIONAL;
5453 else
11343788 5454 return no_fh_allowed(o);
79072805
LW		 5455 }
5456
11343788 5457 if (o->op_flags & OPf_KIDS) {
2d8e6c8d 5458 STRLEN n_a;
11343788
MB		 5459 tokid = &cLISTOPo->op_first;
5460 kid = cLISTOPo->op_first;
8990e307 5461 if (kid->op_type == OP_PUSHMARK ||
155aba94 5462 (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK))
8990e307 5463 {
79072805
LW		 5464 tokid = &kid->op_sibling;
5465 kid = kid->op_sibling;
5466 }
22c35a8c 5467 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 5468 *tokid = kid = newDEFSVOP();
79072805
LW		 5469
5470 while (oa && kid) {
5471 numargs++;
5472 sibl = kid->op_sibling;
5473 switch (oa & 7) {
5474 case OA_SCALAR:
62c18ce2
GS		 5475 /* list seen where single (scalar) arg expected? */
5476 if (numargs == 1 && !(oa >> 4)
5477 && kid->op_type == OP_LIST && type != OP_SCALAR)
5478 {
5479 return too_many_arguments(o,PL_op_desc[type]);
5480 }
79072805
LW		 5481 scalar(kid);
5482 break;
5483 case OA_LIST:
5484 if (oa < 16) {
5485 kid = 0;
5486 continue;
5487 }
5488 else
5489 list(kid);
5490 break;
5491 case OA_AVREF:
5492 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5493 (kid->op_private & OPpCONST_BARE))
5494 {
2d8e6c8d 5495 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5496 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 5497 gv_fetchpv(name, TRUE, SVt_PVAV) ));
e476b1b5
GS		 5498 if (ckWARN(WARN_DEPRECATED))
5499 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5500 "Array @%s missing the @ in argument %"IVdf" of %s()",
cf2093f6 5501 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5502 op_free(kid);
5503 kid = newop;
5504 kid->op_sibling = sibl;
5505 *tokid = kid;
5506 }
8990e307 5507 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
35cd451c 5508 bad_type(numargs, "array", PL_op_desc[type], kid);
a0d0e21e 5509 mod(kid, type);
79072805
LW		 5510 break;
5511 case OA_HVREF:
5512 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5513 (kid->op_private & OPpCONST_BARE))
5514 {
2d8e6c8d 5515 char *name = SvPVx(((SVOP*)kid)->op_sv, n_a);
79072805 5516 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 5517 gv_fetchpv(name, TRUE, SVt_PVHV) ));
e476b1b5
GS		 5518 if (ckWARN(WARN_DEPRECATED))
5519 Perl_warner(aTHX_ WARN_DEPRECATED,
57def98f 5520 "Hash %%%s missing the %% in argument %"IVdf" of %s()",
cf2093f6 5521 name, (IV)numargs, PL_op_desc[type]);
79072805
LW		 5522 op_free(kid);
5523 kid = newop;
5524 kid->op_sibling = sibl;
5525 *tokid = kid;
5526 }
8990e307 5527 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
35cd451c 5528 bad_type(numargs, "hash", PL_op_desc[type], kid);
a0d0e21e 5529 mod(kid, type);
79072805
LW		 5530 break;
5531 case OA_CVREF:
5532 {
a0d0e21e 5533 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 5534 kid->op_sibling = 0;
5535 linklist(kid);
5536 newop->op_next = newop;
5537 kid = newop;
5538 kid->op_sibling = sibl;
5539 *tokid = kid;
5540 }
5541 break;
5542 case OA_FILEREF:
c340be78 5543 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805 5544 if (kid->op_type == OP_CONST &&
62c18ce2
GS		 5545 (kid->op_private & OPpCONST_BARE))
5546 {
79072805 5547 OP *newop = newGVOP(OP_GV, 0,
2d8e6c8d 5548 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, n_a), TRUE,
85e6fe83 5549 SVt_PVIO) );
79072805
LW		 5550 op_free(kid);
5551 kid = newop;
5552 }
1ea32a52
GS		 5553 else if (kid->op_type == OP_READLINE) {
5554 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
5555 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
5556 }
79072805 5557 else {
35cd451c 5558 I32 flags = OPf_SPECIAL;
a6c40364 5559 I32 priv = 0;
2c8ac474
GS		 5560 PADOFFSET targ = 0;
5561
35cd451c 5562 /* is this op a FH constructor? */
853846ea 5563 if (is_handle_constructor(o,numargs)) {
2c8ac474
GS		 5564 char *name = Nullch;
5565 STRLEN len;
5566
5567 flags = 0;
5568 /* Set a flag to tell rv2gv to vivify
853846ea
NIS		 5569 * need to "prove" flag does not mean something
5570 * else already - NI-S 1999/05/07
2c8ac474
GS		 5571 */
5572 priv = OPpDEREF;
5573 if (kid->op_type == OP_PADSV) {
5574 SV **namep = av_fetch(PL_comppad_name,
5575 kid->op_targ, 4);
5576 if (namep && *namep)
5577 name = SvPV(*namep, len);
5578 }
5579 else if (kid->op_type == OP_RV2SV
5580 && kUNOP->op_first->op_type == OP_GV)
5581 {
5582 GV *gv = cGVOPx_gv(kUNOP->op_first);
5583 name = GvNAME(gv);
5584 len = GvNAMELEN(gv);
5585 }
afd1915d
GS		 5586 else if (kid->op_type == OP_AELEM
5587 || kid->op_type == OP_HELEM)
5588 {
5589 name = "__ANONIO__";
5590 len = 10;
5591 mod(kid,type);
5592 }
2c8ac474
GS		 5593 if (name) {
5594 SV *namesv;
5595 targ = pad_alloc(OP_RV2GV, SVs_PADTMP);
5596 namesv = PL_curpad[targ];
155aba94 5597 (void)SvUPGRADE(namesv, SVt_PV);
2c8ac474
GS		 5598 if (*name != '$')
5599 sv_setpvn(namesv, "$", 1);
5600 sv_catpvn(namesv, name, len);
5601 }
853846ea 5602 }
79072805 5603 kid->op_sibling = 0;
35cd451c 5604 kid = newUNOP(OP_RV2GV, flags, scalar(kid));
2c8ac474
GS		 5605 kid->op_targ = targ;
5606 kid->op_private |= priv;
79072805
LW		 5607 }
5608 kid->op_sibling = sibl;
5609 *tokid = kid;
5610 }
5611 scalar(kid);
5612 break;
5613 case OA_SCALARREF:
a0d0e21e 5614 mod(scalar(kid), type);
79072805
LW		 5615 break;
5616 }
5617 oa >>= 4;
5618 tokid = &kid->op_sibling;
5619 kid = kid->op_sibling;
5620 }
11343788 5621 o->op_private |= numargs;
79072805 5622 if (kid)
22c35a8c 5623 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 5624 listkids(o);
79072805 5625 }
22c35a8c 5626 else if (PL_opargs[type] & OA_DEFGV) {
11343788 5627 op_free(o);
54b9620d 5628 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 5629 }
5630
79072805
LW		 5631 if (oa) {
5632 while (oa & OA_OPTIONAL)
5633 oa >>= 4;
5634 if (oa && oa != OA_LIST)
22c35a8c 5635 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 5636 }
11343788 5637 return o;
79072805
LW		 5638}
5639
5640OP *
cea2e8a9 5641Perl_ck_glob(pTHX_ OP *o)
79072805 5642{
fb73857a 5643 GV *gv;
5644
649da076 5645 o = ck_fun(o);
1f2bfc8a 5646 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 5647 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 5648
5649 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
5650 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 5651
52bb0670 5652#if !defined(PERL_EXTERNAL_GLOB)
72b16652
GS		 5653 /* XXX this can be tightened up and made more failsafe. */
5654 if (!gv) {
72b16652 5655 ENTER;
e4783991
GS		 5656 Perl_load_module(aTHX_ 0, newSVpvn("File::Glob", 10), Nullsv,
5657 /* null-terminated import list */
5658 newSVpvn(":globally", 9), Nullsv);
72b16652
GS		 5659 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
5660 LEAVE;
5661 }
52bb0670 5662#endif /* PERL_EXTERNAL_GLOB */
72b16652 5663
b1cb66bf 5664 if (gv && GvIMPORTED_CV(gv)) {
5196be3e 5665 append_elem(OP_GLOB, o,
80252599 5666 newSVOP(OP_CONST, 0, newSViv(PL_glob_index++)));
1f2bfc8a 5667 o->op_type = OP_LIST;
22c35a8c 5668 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 5669 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 5670 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 5671 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 5672 append_elem(OP_LIST, o,
1f2bfc8a
MB		 5673 scalar(newUNOP(OP_RV2CV, 0,
5674 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 5675 o = newUNOP(OP_NULL, 0, ck_subr(o));
5676 o->op_targ = OP_GLOB; /* hint at what it used to be */
5677 return o;
b1cb66bf 5678 }
5679 gv = newGVgen("main");
a0d0e21e 5680 gv_IOadd(gv);
11343788
MB		 5681 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
5682 scalarkids(o);
649da076 5683 return o;
79072805
LW		 5684}
5685
5686OP *
cea2e8a9 5687Perl_ck_grep(pTHX_ OP *o)
79072805
LW		 5688{
5689 LOGOP *gwop;
5690 OP *kid;
11343788 5691 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 5692
22c35a8c 5693 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
b7dc083c 5694 NewOp(1101, gwop, 1, LOGOP);
aeea060c 5695
11343788 5696 if (o->op_flags & OPf_STACKED) {
a0d0e21e 5697 OP* k;
11343788
MB		 5698 o = ck_sort(o);
5699 kid = cLISTOPo->op_first->op_sibling;
5700 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 5701 kid = k;
5702 }
5703 kid->op_next = (OP*)gwop;
11343788 5704 o->op_flags &= ~OPf_STACKED;
93a17b20 5705 }
11343788 5706 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 5707 if (type == OP_MAPWHILE)
5708 list(kid);
5709 else
5710 scalar(kid);
11343788 5711 o = ck_fun(o);
3280af22 5712 if (PL_error_count)
11343788 5713 return o;
aeea060c 5714 kid = cLISTOPo->op_first->op_sibling;
79072805 5715 if (kid->op_type != OP_NULL)
cea2e8a9 5716 Perl_croak(aTHX_ "panic: ck_grep");
79072805
LW		 5717 kid = kUNOP->op_first;
5718
a0d0e21e 5719 gwop->op_type = type;
22c35a8c 5720 gwop->op_ppaddr = PL_ppaddr[type];
11343788 5721 gwop->op_first = listkids(o);
79072805
LW		 5722 gwop->op_flags |= OPf_KIDS;
5723 gwop->op_private = 1;
5724 gwop->op_other = LINKLIST(kid);
a0d0e21e 5725 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 5726 kid->op_next = (OP*)gwop;
5727
11343788 5728 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 5729 if (!kid || !kid->op_sibling)
22c35a8c 5730 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 5731 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
5732 mod(kid, OP_GREPSTART);
5733
79072805
LW		 5734 return (OP*)gwop;
5735}
5736
5737OP *
cea2e8a9 5738Perl_ck_index(pTHX_ OP *o)
79072805 5739{
11343788
MB		 5740 if (o->op_flags & OPf_KIDS) {
5741 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 5742 if (kid)
5743 kid = kid->op_sibling; /* get past "big" */
79072805 5744 if (kid && kid->op_type == OP_CONST)
2779dcf1 5745 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 5746 }
11343788 5747 return ck_fun(o);
79072805
LW		 5748}
5749
5750OP *
cea2e8a9 5751Perl_ck_lengthconst(pTHX_ OP *o)
79072805
LW		 5752{
5753 /* XXX length optimization goes here */
11343788 5754 return ck_fun(o);
79072805
LW		 5755}
5756
5757OP *
cea2e8a9 5758Perl_ck_lfun(pTHX_ OP *o)
79072805 5759{
5dc0d613
MB		 5760 OPCODE type = o->op_type;
5761 return modkids(ck_fun(o), type);
79072805
LW		 5762}
5763
5764OP *
cea2e8a9 5765Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */
69794302 5766{
20ce7b12 5767 dTHR;
d0334bed
GS		 5768 if ((o->op_flags & OPf_KIDS) && ckWARN(WARN_DEPRECATED)) {
5769 switch (cUNOPo->op_first->op_type) {
5770 case OP_RV2AV:
a8739d98
JH		 5771 /* This is needed for
5772 if (defined %stash::)
5773 to work. Do not break Tk.
5774 */
1c846c1f 5775 break; /* Globals via GV can be undef */
d0334bed
GS		 5776 case OP_PADAV:
5777 case OP_AASSIGN: /* Is this a good idea? */
5778 Perl_warner(aTHX_ WARN_DEPRECATED,
f10b0346 5779 "defined(@array) is deprecated");
d0334bed 5780 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5781 "\t(Maybe you should just omit the defined()?)\n");
69794302 5782 break;
d0334bed 5783 case OP_RV2HV:
a8739d98
JH		 5784 /* This is needed for
5785 if (defined %stash::)
5786 to work. Do not break Tk.
5787 */
1c846c1f 5788 break; /* Globals via GV can be undef */
d0334bed
GS		 5789 case OP_PADHV:
5790 Perl_warner(aTHX_ WARN_DEPRECATED,
894356b3 5791 "defined(%%hash) is deprecated");
d0334bed 5792 Perl_warner(aTHX_ WARN_DEPRECATED,
cc507455 5793 "\t(Maybe you should just omit the defined()?)\n");
d0334bed
GS		 5794 break;
5795 default:
5796 /* no warning */
5797 break;
5798 }
69794302
MJD		 5799 }
5800 return ck_rfun(o);
5801}
5802
5803OP *
cea2e8a9 5804Perl_ck_rfun(pTHX_ OP *o)
8990e307 5805{
5dc0d613
MB		 5806 OPCODE type = o->op_type;
5807 return refkids(ck_fun(o), type);
8990e307
LW		 5808}
5809
5810OP *
cea2e8a9 5811Perl_ck_listiob(pTHX_ OP *o)
79072805
LW		 5812{
5813 register OP *kid;
aeea060c 5814
11343788 5815 kid = cLISTOPo->op_first;
79072805 5816 if (!kid) {
11343788
MB		 5817 o = force_list(o);
5818 kid = cLISTOPo->op_first;
79072805
LW		 5819 }
5820 if (kid->op_type == OP_PUSHMARK)
5821 kid = kid->op_sibling;
11343788 5822 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 5823 kid = kid->op_sibling;
5824 else if (kid && !kid->op_sibling) { /* print HANDLE; */
5825 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 5826 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 5827 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 5828 cLISTOPo->op_first->op_sibling = kid;
5829 cLISTOPo->op_last = kid;
79072805
LW		 5830 kid = kid->op_sibling;
5831 }
5832 }
5833
5834 if (!kid)
54b9620d 5835 append_elem(o->op_type, o, newDEFSVOP());
79072805 5836
5dc0d613 5837 o = listkids(o);
bbce6d69 5838
5dc0d613 5839 o->op_private = 0;
36477c24 5840#ifdef USE_LOCALE
3280af22 5841 if (PL_hints & HINT_LOCALE)
5dc0d613 5842 o->op_private |= OPpLOCALE;
bbce6d69 5843#endif
5844
5dc0d613 5845 return o;
bbce6d69 5846}
5847
5848OP *
cea2e8a9 5849Perl_ck_fun_locale(pTHX_ OP *o)
bbce6d69 5850{
5dc0d613 5851 o = ck_fun(o);
bbce6d69 5852
5dc0d613 5853 o->op_private = 0;
36477c24 5854#ifdef USE_LOCALE
3280af22 5855 if (PL_hints & HINT_LOCALE)
5dc0d613 5856 o->op_private |= OPpLOCALE;
bbce6d69 5857#endif
5858
5dc0d613 5859 return o;
bbce6d69 5860}
5861
5862OP *
b162f9ea
IZ		 5863Perl_ck_sassign(pTHX_ OP *o)
5864{
5865 OP *kid = cLISTOPo->op_first;
5866 /* has a disposable target? */
5867 if ((PL_opargs[kid->op_type] & OA_TARGLEX)
6b66af17
GS		 5868 && !(kid->op_flags & OPf_STACKED)
5869 /* Cannot steal the second time! */
5870 && !(kid->op_private & OPpTARGET_MY))
b162f9ea
IZ		 5871 {
5872 OP *kkid = kid->op_sibling;
5873
5874 /* Can just relocate the target. */
2c2d71f5
JH		 5875 if (kkid && kkid->op_type == OP_PADSV
5876 && !(kkid->op_private & OPpLVAL_INTRO))
5877 {
b162f9ea 5878 kid->op_targ = kkid->op_targ;
743e66e6 5879 kkid->op_targ = 0;
b162f9ea
IZ		 5880 /* Now we do not need PADSV and SASSIGN. */
5881 kid->op_sibling = o->op_sibling; /* NULL */
5882 cLISTOPo->op_first = NULL;
5883 op_free(o);
5884 op_free(kkid);
5885 kid->op_private |= OPpTARGET_MY; /* Used for context settings */
5886 return kid;
5887 }
5888 }
5889 return o;
5890}
5891
5892OP *
cea2e8a9 5893Perl_ck_scmp(pTHX_ OP *o)
bbce6d69 5894{
5dc0d613 5895 o->op_private = 0;
36477c24 5896#ifdef USE_LOCALE
3280af22 5897 if (PL_hints & HINT_LOCALE)
5dc0d613 5898 o->op_private |= OPpLOCALE;
bbce6d69 5899#endif
36477c24 5900
5dc0d613 5901 return o;
79072805
LW		 5902}
5903
5904OP *
cea2e8a9 5905Perl_ck_match(pTHX_ OP *o)
79072805 5906{
5dc0d613 5907 o->op_private |= OPpRUNTIME;
11343788 5908 return o;
79072805
LW		 5909}
5910
5911OP *
f5d5a27c
CS		 5912Perl_ck_method(pTHX_ OP *o)
5913{
5914 OP *kid = cUNOPo->op_first;
5915 if (kid->op_type == OP_CONST) {
5916 SV* sv = kSVOP->op_sv;
5917 if (!(strchr(SvPVX(sv), ':') || strchr(SvPVX(sv), '\''))) {
5918 OP *cmop;
1c846c1f
NIS		 5919 if (!SvREADONLY(sv) || !SvFAKE(sv)) {
5920 sv = newSVpvn_share(SvPVX(sv), SvCUR(sv), 0);
5921 }
5922 else {
5923 kSVOP->op_sv = Nullsv;
5924 }
f5d5a27c 5925 cmop = newSVOP(OP_METHOD_NAMED, 0, sv);
f5d5a27c
CS		 5926 op_free(o);
5927 return cmop;
5928 }
5929 }
5930 return o;
5931}
5932
5933OP *
cea2e8a9 5934Perl_ck_null(pTHX_ OP *o)
79072805 5935{
11343788 5936 return o;
79072805
LW		 5937}
5938
5939OP *
16fe6d59
GS		 5940Perl_ck_open(pTHX_ OP *o)
5941{
5942 HV *table = GvHV(PL_hintgv);
5943 if (table) {
5944 SV **svp;
5945 I32 mode;
5946 svp = hv_fetch(table, "open_IN", 7, FALSE);
5947 if (svp && *svp) {
5948 mode = mode_from_discipline(*svp);
5949 if (mode & O_BINARY)
5950 o->op_private |= OPpOPEN_IN_RAW;
5951 else if (mode & O_TEXT)
5952 o->op_private |= OPpOPEN_IN_CRLF;
5953 }
5954
5955 svp = hv_fetch(table, "open_OUT", 8, FALSE);
5956 if (svp && *svp) {
5957 mode = mode_from_discipline(*svp);
5958 if (mode & O_BINARY)
5959 o->op_private |= OPpOPEN_OUT_RAW;
5960 else if (mode & O_TEXT)
5961 o->op_private |= OPpOPEN_OUT_CRLF;
5962 }
5963 }
5964 if (o->op_type == OP_BACKTICK)
5965 return o;
5966 return ck_fun(o);
5967}
5968
5969OP *
cea2e8a9 5970Perl_ck_repeat(pTHX_ OP *o)
79072805 5971{
11343788
MB		 5972 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
5973 o->op_private |= OPpREPEAT_DOLIST;
5974 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 5975 }
5976 else
11343788
MB		 5977 scalar(o);
5978 return o;
79072805
LW		 5979}
5980
5981OP *
cea2e8a9 5982Perl_ck_require(pTHX_ OP *o)
8990e307 5983{
11343788
MB		 5984 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
5985 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 5986
5987 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 5988 char *s;
a0d0e21e
LW		 5989 for (s = SvPVX(kid->op_sv); *s; s++) {
5990 if (*s == ':' && s[1] == ':') {
5991 *s = '/';
1aef975c 5992 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 5993 --SvCUR(kid->op_sv);
5994 }
8990e307 5995 }
ce3b816e
GS		 5996 if (SvREADONLY(kid->op_sv)) {
5997 SvREADONLY_off(kid->op_sv);
5998 sv_catpvn(kid->op_sv, ".pm", 3);
5999 SvREADONLY_on(kid->op_sv);
6000 }
6001 else
6002 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 6003 }
6004 }
11343788 6005 return ck_fun(o);
8990e307
LW		 6006}
6007
22c35a8c 6008#if 0
8990e307 6009OP *
cea2e8a9 6010Perl_ck_retarget(pTHX_ OP *o)
79072805 6011{
cea2e8a9 6012 Perl_croak(aTHX_ "NOT IMPL LINE %d",__LINE__);
79072805 6013 /* STUB */
11343788 6014 return o;
79072805 6015}
22c35a8c 6016#endif
79072805
LW		 6017
6018OP *
cea2e8a9 6019Perl_ck_select(pTHX_ OP *o)
79072805 6020{
c07a80fd 6021 OP* kid;
11343788
MB		 6022 if (o->op_flags & OPf_KIDS) {
6023 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 6024 if (kid && kid->op_sibling) {
11343788 6025 o->op_type = OP_SSELECT;
22c35a8c 6026 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 6027 o = ck_fun(o);
6028 return fold_constants(o);
79072805
LW		 6029 }
6030 }
11343788
MB		 6031 o = ck_fun(o);
6032 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 6033 if (kid && kid->op_type == OP_RV2GV)
6034 kid->op_private &= ~HINT_STRICT_REFS;
11343788 6035 return o;
79072805
LW		 6036}
6037
6038OP *
cea2e8a9 6039Perl_ck_shift(pTHX_ OP *o)
79072805 6040{
11343788 6041 I32 type = o->op_type;
79072805 6042
11343788 6043 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 6044 OP *argop;
6045
11343788 6046 op_free(o);
6d4ff0d2 6047#ifdef USE_THREADS
533c011a 6048 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 6049 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 6050 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 6051 }
6052 else {
6053 argop = newUNOP(OP_RV2AV, 0,
6054 scalar(newGVOP(OP_GV, 0,
6055 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6056 }
6057#else
6058 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 6059 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
6060 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 6061#endif /* USE_THREADS */
6062 return newUNOP(type, 0, scalar(argop));
79072805 6063 }
11343788 6064 return scalar(modkids(ck_fun(o), type));
79072805
LW		 6065}
6066
6067OP *
cea2e8a9 6068Perl_ck_sort(pTHX_ OP *o)
79072805 6069{
8e3f9bdf 6070 OP *firstkid;
5dc0d613 6071 o->op_private = 0;
36477c24 6072#ifdef USE_LOCALE
3280af22 6073 if (PL_hints & HINT_LOCALE)
5dc0d613 6074 o->op_private |= OPpLOCALE;
bbce6d69 6075#endif
6076
9ea6e965 6077 if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED)
51a19bc0 6078 simplify_sort(o);
8e3f9bdf
GS		 6079 firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6080 if (o->op_flags & OPf_STACKED) { /* may have been cleared */
463ee0b2 6081 OP *k;
8e3f9bdf 6082 OP *kid = cUNOPx(firstkid)->op_first; /* get past null */
79072805 6083
463ee0b2 6084 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 6085 linklist(kid);
463ee0b2
LW		 6086 if (kid->op_type == OP_SCOPE) {
6087 k = kid->op_next;
6088 kid->op_next = 0;
79072805 6089 }
463ee0b2 6090 else if (kid->op_type == OP_LEAVE) {
11343788 6091 if (o->op_type == OP_SORT) {
748a9306
LW		 6092 null(kid); /* wipe out leave */
6093 kid->op_next = kid;
463ee0b2 6094
748a9306
LW		 6095 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
6096 if (k->op_next == kid)
6097 k->op_next = 0;
71a29c3c
GS		 6098 /* don't descend into loops */
6099 else if (k->op_type == OP_ENTERLOOP
6100 || k->op_type == OP_ENTERITER)
6101 {
6102 k = cLOOPx(k)->op_lastop;
6103 }
748a9306 6104 }
463ee0b2 6105 }
748a9306
LW		 6106 else
6107 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 6108 k = kLISTOP->op_first;
463ee0b2 6109 }
a0d0e21e
LW		 6110 peep(k);
6111
8e3f9bdf
GS		 6112 kid = firstkid;
6113 if (o->op_type == OP_SORT) {
6114 /* provide scalar context for comparison function/block */
6115 kid = scalar(kid);
a0d0e21e 6116 kid->op_next = kid;
8e3f9bdf 6117 }
a0d0e21e
LW		 6118 else
6119 kid->op_next = k;
11343788 6120 o->op_flags |= OPf_SPECIAL;
79072805 6121 }
c6e96bcb 6122 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
8e3f9bdf
GS		 6123 null(firstkid);
6124
6125 firstkid = firstkid->op_sibling;
79072805 6126 }
bbce6d69 6127
8e3f9bdf
GS		 6128 /* provide list context for arguments */
6129 if (o->op_type == OP_SORT)
6130 list(firstkid);
6131
11343788 6132 return o;
79072805 6133}
bda4119b
GS		 6134
6135STATIC void
cea2e8a9 6136S_simplify_sort(pTHX_ OP *o)
9c007264 6137{
51a19bc0 6138 dTHR;
9c007264
JH		 6139 register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
6140 OP *k;
6141 int reversed;
350de78d 6142 GV *gv;
9c007264
JH		 6143 if (!(o->op_flags & OPf_STACKED))
6144 return;
1c846c1f
NIS		 6145 GvMULTI_on(gv_fetchpv("a", TRUE, SVt_PV));
6146 GvMULTI_on(gv_fetchpv("b", TRUE, SVt_PV));
82092f1d 6147 kid = kUNOP->op_first; /* get past null */
9c007264
JH		 6148 if (kid->op_type != OP_SCOPE)
6149 return;
6150 kid = kLISTOP->op_last; /* get past scope */
6151 switch(kid->op_type) {
6152 case OP_NCMP:
6153 case OP_I_NCMP:
6154 case OP_SCMP:
6155 break;
6156 default:
6157 return;
6158 }
6159 k = kid; /* remember this node*/
6160 if (kBINOP->op_first->op_type != OP_RV2SV)
6161 return;
6162 kid = kBINOP->op_first; /* get past cmp */
6163 if (kUNOP->op_first->op_type != OP_GV)
6164 return;
6165 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6166 gv = kGVOP_gv;
350de78d 6167 if (GvSTASH(gv) != PL_curstash)
9c007264 6168 return;
350de78d 6169 if (strEQ(GvNAME(gv), "a"))
9c007264 6170 reversed = 0;
0f79a09d 6171 else if (strEQ(GvNAME(gv), "b"))
9c007264
JH		 6172 reversed = 1;
6173 else
6174 return;
6175 kid = k; /* back to cmp */
6176 if (kBINOP->op_last->op_type != OP_RV2SV)
6177 return;
6178 kid = kBINOP->op_last; /* down to 2nd arg */
6179 if (kUNOP->op_first->op_type != OP_GV)
6180 return;
6181 kid = kUNOP->op_first; /* get past rv2sv */
638eceb6 6182 gv = kGVOP_gv;
350de78d 6183 if (GvSTASH(gv) != PL_curstash
9c007264 6184 || ( reversed
350de78d
GS		 6185 ? strNE(GvNAME(gv), "a")
6186 : strNE(GvNAME(gv), "b")))
9c007264
JH		 6187 return;
6188 o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL);
6189 if (reversed)
6190 o->op_private |= OPpSORT_REVERSE;
6191 if (k->op_type == OP_NCMP)
6192 o->op_private |= OPpSORT_NUMERIC;
6193 if (k->op_type == OP_I_NCMP)
6194 o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER;
e507f050
SM		 6195 kid = cLISTOPo->op_first->op_sibling;
6196 cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */
6197 op_free(kid); /* then delete it */
6198 cLISTOPo->op_children--;
9c007264 6199}
79072805
LW		 6200
6201OP *
cea2e8a9 6202Perl_ck_split(pTHX_ OP *o)
79072805
LW		 6203{
6204 register OP *kid;
aeea060c 6205
11343788
MB		 6206 if (o->op_flags & OPf_STACKED)
6207 return no_fh_allowed(o);
79072805 6208
11343788 6209 kid = cLISTOPo->op_first;
8990e307 6210 if (kid->op_type != OP_NULL)
cea2e8a9 6211 Perl_croak(aTHX_ "panic: ck_split");
8990e307 6212 kid = kid->op_sibling;
11343788
MB		 6213 op_free(cLISTOPo->op_first);
6214 cLISTOPo->op_first = kid;
85e6fe83 6215 if (!kid) {
79cb57f6 6216 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvn(" ", 1));
11343788 6217 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 6218 }
79072805 6219
de4bf5b3 6220 if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) {
79072805 6221 OP *sibl = kid->op_sibling;
463ee0b2 6222 kid->op_sibling = 0;
79072805 6223 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 6224 if (cLISTOPo->op_first == cLISTOPo->op_last)
6225 cLISTOPo->op_last = kid;
6226 cLISTOPo->op_first = kid;
79072805
LW		 6227 kid->op_sibling = sibl;
6228 }
6229
6230 kid->op_type = OP_PUSHRE;
22c35a8c 6231 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 6232 scalar(kid);
6233
6234 if (!kid->op_sibling)
54b9620d 6235 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 6236
6237 kid = kid->op_sibling;
6238 scalar(kid);
6239
6240 if (!kid->op_sibling)
11343788 6241 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 6242
6243 kid = kid->op_sibling;
6244 scalar(kid);
6245
6246 if (kid->op_sibling)
22c35a8c 6247 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 6248
11343788 6249 return o;
79072805
LW		 6250}
6251
6252OP *
1c846c1f 6253Perl_ck_join(pTHX_ OP *o)
eb6e2d6f
GS		 6254{
6255 if (ckWARN(WARN_SYNTAX)) {
6256 OP *kid = cLISTOPo->op_first->op_sibling;
6257 if (kid && kid->op_type == OP_MATCH) {
6258 char *pmstr = "STRING";
6259 if (kPMOP->op_pmregexp)
6260 pmstr = kPMOP->op_pmregexp->precomp;
6261 Perl_warner(aTHX_ WARN_SYNTAX,
6262 "/%s/ should probably be written as \"%s\"",
6263 pmstr, pmstr);
6264 }
6265 }
6266 return ck_fun(o);
6267}
6268
6269OP *
cea2e8a9 6270Perl_ck_subr(pTHX_ OP *o)
79072805 6271{
11343788
MB		 6272 dTHR;
6273 OP *prev = ((cUNOPo->op_first->op_sibling)
6274 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
6275 OP *o2 = prev->op_sibling;
4633a7c4
LW		 6276 OP *cvop;
6277 char *proto = 0;
6278 CV *cv = 0;
46fc3d4c 6279 GV *namegv = 0;
4633a7c4
LW		 6280 int optional = 0;
6281 I32 arg = 0;
2d8e6c8d 6282 STRLEN n_a;
4633a7c4 6283
d3011074 6284 o->op_private |= OPpENTERSUB_HASTARG;
11343788 6285 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 6286 if (cvop->op_type == OP_RV2CV) {
6287 SVOP* tmpop;
11343788 6288 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 6289 null(cvop); /* disable rv2cv */
6290 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
76cd736e 6291 if (tmpop->op_type == OP_GV && !(o->op_private & OPpENTERSUB_AMPER)) {
638eceb6 6292 GV *gv = cGVOPx_gv(tmpop);
350de78d 6293 cv = GvCVu(gv);
76cd736e
GS		 6294 if (!cv)
6295 tmpop->op_private |= OPpEARLY_CV;
6296 else if (SvPOK(cv)) {
350de78d 6297 namegv = CvANON(cv) ? gv : CvGV(cv);
2d8e6c8d 6298 proto = SvPV((SV*)cv, n_a);
46fc3d4c 6299 }
4633a7c4
LW		 6300 }
6301 }
f5d5a27c 6302 else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) {
7a52d87a
GS		 6303 if (o2->op_type == OP_CONST)
6304 o2->op_private &= ~OPpCONST_STRICT;
58a40671
GS		 6305 else if (o2->op_type == OP_LIST) {
6306 OP *o = ((UNOP*)o2)->op_first->op_sibling;
6307 if (o && o->op_type == OP_CONST)
6308 o->op_private &= ~OPpCONST_STRICT;
6309 }
7a52d87a 6310 }
3280af22
NIS		 6311 o->op_private |= (PL_hints & HINT_STRICT_REFS);
6312 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 6313 o->op_private |= OPpENTERSUB_DB;
6314 while (o2 != cvop) {
4633a7c4
LW		 6315 if (proto) {
6316 switch (*proto) {
6317 case '\0':
5dc0d613 6318 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 6319 case ';':
6320 optional = 1;
6321 proto++;
6322 continue;
6323 case '$':
6324 proto++;
6325 arg++;
11343788 6326 scalar(o2);
4633a7c4
LW		 6327 break;
6328 case '%':
6329 case '@':
11343788 6330 list(o2);
4633a7c4
LW		 6331 arg++;
6332 break;
6333 case '&':
6334 proto++;
6335 arg++;
11343788 6336 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
75fc29ea
GS		 6337 bad_type(arg,
6338 arg == 1 ? "block or sub {}" : "sub {}",
6339 gv_ename(namegv), o2);
4633a7c4
LW		 6340 break;
6341 case '*':
2ba6ecf4 6342 /* '*' allows any scalar type, including bareword */
4633a7c4
LW		 6343 proto++;
6344 arg++;
11343788 6345 if (o2->op_type == OP_RV2GV)
2ba6ecf4 6346 goto wrapref; /* autoconvert GLOB -> GLOBref */
7a52d87a
GS		 6347 else if (o2->op_type == OP_CONST)
6348 o2->op_private &= ~OPpCONST_STRICT;
9675f7ac
GS		 6349 else if (o2->op_type == OP_ENTERSUB) {
6350 /* accidental subroutine, revert to bareword */
6351 OP *gvop = ((UNOP*)o2)->op_first;
6352 if (gvop && gvop->op_type == OP_NULL) {
6353 gvop = ((UNOP*)gvop)->op_first;
6354 if (gvop) {
6355 for (; gvop->op_sibling; gvop = gvop->op_sibling)
6356 ;
6357 if (gvop &&
6358 (gvop->op_private & OPpENTERSUB_NOPAREN) &&
6359 (gvop = ((UNOP*)gvop)->op_first) &&
6360 gvop->op_type == OP_GV)
6361 {
638eceb6 6362 GV *gv = cGVOPx_gv(gvop);
9675f7ac 6363 OP *sibling = o2->op_sibling;
2692f720 6364 SV *n = newSVpvn("",0);
9675f7ac 6365 op_free(o2);
2692f720
GS		 6366 gv_fullname3(n, gv, "");
6367 if (SvCUR(n)>6 && strnEQ(SvPVX(n),"main::",6))
6368 sv_chop(n, SvPVX(n)+6);
6369 o2 = newSVOP(OP_CONST, 0, n);
9675f7ac
GS		 6370 prev->op_sibling = o2;
6371 o2->op_sibling = sibling;
6372 }
6373 }
6374 }
6375 }
2ba6ecf4
GS		 6376 scalar(o2);
6377 break;
4633a7c4
LW		 6378 case '\\':
6379 proto++;
6380 arg++;
6381 switch (*proto++) {
6382 case '*':
11343788 6383 if (o2->op_type != OP_RV2GV)
5dc0d613 6384 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 6385 goto wrapref;
6386 case '&':
75fc29ea
GS		 6387 if (o2->op_type != OP_ENTERSUB)
6388 bad_type(arg, "subroutine entry", gv_ename(namegv), o2);
4633a7c4
LW		 6389 goto wrapref;
6390 case '$':
386acf99
GS		 6391 if (o2->op_type != OP_RV2SV
6392 && o2->op_type != OP_PADSV
1c01eb51
GS		 6393 && o2->op_type != OP_HELEM
6394 && o2->op_type != OP_AELEM
386acf99
GS		 6395 && o2->op_type != OP_THREADSV)
6396 {
5dc0d613 6397 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 6398 }
4633a7c4
LW		 6399 goto wrapref;
6400 case '@':
11343788 6401 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 6402 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 6403 goto wrapref;
6404 case '%':
11343788 6405 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 6406 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 6407 wrapref:
6408 {
11343788 6409 OP* kid = o2;
6fa846a0 6410 OP* sib = kid->op_sibling;
4633a7c4 6411 kid->op_sibling = 0;
6fa846a0
GS		 6412 o2 = newUNOP(OP_REFGEN, 0, kid);
6413 o2->op_sibling = sib;
e858de61 6414 prev->op_sibling = o2;
4633a7c4
LW		 6415 }
6416 break;
6417 default: goto oops;
6418 }
6419 break;
b1cb66bf 6420 case ' ':
6421 proto++;
6422 continue;
4633a7c4
LW		 6423 default:
6424 oops:
cea2e8a9 6425 Perl_croak(aTHX_ "Malformed prototype for %s: %s",
2d8e6c8d 6426 gv_ename(namegv), SvPV((SV*)cv, n_a));
4633a7c4
LW		 6427 }
6428 }
6429 else
11343788
MB		 6430 list(o2);
6431 mod(o2, OP_ENTERSUB);
6432 prev = o2;
6433 o2 = o2->op_sibling;
4633a7c4 6434 }
fb73857a 6435 if (proto && !optional &&
6436 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 6437 return too_few_arguments(o, gv_ename(namegv));
11343788 6438 return o;
79072805
LW		 6439}
6440
6441OP *
cea2e8a9 6442Perl_ck_svconst(pTHX_ OP *o)
8990e307 6443{
11343788
MB		 6444 SvREADONLY_on(cSVOPo->op_sv);
6445 return o;
8990e307
LW		 6446}
6447
6448OP *
cea2e8a9 6449Perl_ck_trunc(pTHX_ OP *o)
79072805 6450{
11343788
MB		 6451 if (o->op_flags & OPf_KIDS) {
6452 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 6453
a0d0e21e
LW		 6454 if (kid->op_type == OP_NULL)
6455 kid = (SVOP*)kid->op_sibling;
bb53490d
GS		 6456 if (kid && kid->op_type == OP_CONST &&
6457 (kid->op_private & OPpCONST_BARE))
6458 {
11343788 6459 o->op_flags |= OPf_SPECIAL;
bb53490d
GS		 6460 kid->op_private &= ~OPpCONST_STRICT;
6461 }
79072805 6462 }
11343788 6463 return ck_fun(o);
79072805
LW		 6464}
6465
35fba0d9
RG		 6466OP *
6467Perl_ck_substr(pTHX_ OP *o)
6468{
6469 o = ck_fun(o);
6470 if ((o->op_flags & OPf_KIDS) && o->op_private == 4) {
6471 OP *kid = cLISTOPo->op_first;
6472
6473 if (kid->op_type == OP_NULL)
6474 kid = kid->op_sibling;
6475 if (kid)
6476 kid->op_flags |= OPf_MOD;
6477
6478 }
6479 return o;
6480}
6481
463ee0b2
LW		 6482/* A peephole optimizer. We visit the ops in the order they're to execute. */
6483
79072805 6484void
864dbfa3 6485Perl_peep(pTHX_ register OP *o)
79072805 6486{
11343788 6487 dTHR;
79072805 6488 register OP* oldop = 0;
2d8e6c8d 6489 STRLEN n_a;
cd06dffe 6490 OP *last_composite = Nullop;
2d8e6c8d 6491
a0d0e21e 6492 if (!o || o->op_seq)
79072805 6493 return;
a0d0e21e 6494 ENTER;
462e5cf6 6495 SAVEOP();
7766f137 6496 SAVEVPTR(PL_curcop);
a0d0e21e
LW		 6497 for (; o; o = o->op_next) {
6498 if (o->op_seq)
6499 break;
3280af22
NIS		 6500 if (!PL_op_seqmax)
6501 PL_op_seqmax++;
533c011a 6502 PL_op = o;
a0d0e21e 6503 switch (o->op_type) {
acb36ea4 6504 case OP_SETSTATE:
a0d0e21e
LW		 6505 case OP_NEXTSTATE:
6506 case OP_DBSTATE:
3280af22
NIS		 6507 PL_curcop = ((COP*)o); /* for warnings */
6508 o->op_seq = PL_op_seqmax++;
cd06dffe 6509 last_composite = Nullop;
a0d0e21e
LW		 6510 break;
6511
a0d0e21e 6512 case OP_CONST:
7a52d87a
GS		 6513 if (cSVOPo->op_private & OPpCONST_STRICT)
6514 no_bareword_allowed(o);
7766f137
GS		 6515#ifdef USE_ITHREADS
6516 /* Relocate sv to the pad for thread safety.
6517 * Despite being a "constant", the SV is written to,
6518 * for reference counts, sv_upgrade() etc. */
6519 if (cSVOP->op_sv) {
6520 PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP);
6a7129a1
GS		 6521 if (SvPADTMP(cSVOPo->op_sv)) {
6522 /* If op_sv is already a PADTMP then it is being used by
6523 * another pad, so make a copy. */
6524 sv_setsv(PL_curpad[ix],cSVOPo->op_sv);
6525 SvREADONLY_on(PL_curpad[ix]);
6526 SvREFCNT_dec(cSVOPo->op_sv);
6527 }
6528 else {
6529 SvREFCNT_dec(PL_curpad[ix]);
6530 SvPADTMP_on(cSVOPo->op_sv);
6531 PL_curpad[ix] = cSVOPo->op_sv;
6532 }
7766f137
GS		 6533 cSVOPo->op_sv = Nullsv;
6534 o->op_targ = ix;
6535 }
6536#endif
07447971
GS		 6537 o->op_seq = PL_op_seqmax++;
6538 break;
6539
ed7ab888 6540 case OP_CONCAT:
b162f9ea
IZ		 6541 if (o->op_next && o->op_next->op_type == OP_STRINGIFY) {
6542 if (o->op_next->op_private & OPpTARGET_MY) {
69b47968 6543 if (o->op_flags & OPf_STACKED) /* chained concats */
b162f9ea 6544 goto ignore_optimization;
cd06dffe 6545 else {
07447971 6546 /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */
b162f9ea 6547 o->op_targ = o->op_next->op_targ;
743e66e6 6548 o->op_next->op_targ = 0;
2c2d71f5 6549 o->op_private |= OPpTARGET_MY;
b162f9ea
IZ		 6550 }
6551 }
a0d0e21e 6552 null(o->op_next);
b162f9ea
IZ		 6553 }
6554 ignore_optimization:
3280af22 6555 o->op_seq = PL_op_seqmax++;
a0d0e21e 6556 break;
8990e307 6557 case OP_STUB:
54310121 6558 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 6559 o->op_seq = PL_op_seqmax++;
54310121 6560 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 6561 }
748a9306 6562 goto nothin;
79072805 6563 case OP_NULL:
acb36ea4
GS		 6564 if (o->op_targ == OP_NEXTSTATE
6565 || o->op_targ == OP_DBSTATE
6566 || o->op_targ == OP_SETSTATE)
6567 {
3280af22 6568 PL_curcop = ((COP*)o);
acb36ea4 6569 }
748a9306 6570 goto nothin;
79072805 6571 case OP_SCALAR:
93a17b20 6572 case OP_LINESEQ:
463ee0b2 6573 case OP_SCOPE:
748a9306 6574 nothin:
a0d0e21e
LW		 6575 if (oldop && o->op_next) {
6576 oldop->op_next = o->op_next;
79072805
LW		 6577 continue;
6578 }
3280af22 6579 o->op_seq = PL_op_seqmax++;
79072805
LW		 6580 break;
6581
6582 case OP_GV:
a0d0e21e 6583 if (o->op_next->op_type == OP_RV2SV) {
64aac5a9 6584 if (!(o->op_next->op_private & OPpDEREF)) {
ef8040b0 6585 null(o->op_next);
64aac5a9
GS		 6586 o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO
6587 | OPpOUR_INTRO);
a0d0e21e
LW		 6588 o->op_next = o->op_next->op_next;
6589 o->op_type = OP_GVSV;
22c35a8c 6590 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 6591 }
6592 }
a0d0e21e
LW		 6593 else if (o->op_next->op_type == OP_RV2AV) {
6594 OP* pop = o->op_next->op_next;
6595 IV i;
8990e307 6596 if (pop->op_type == OP_CONST &&
533c011a 6597 (PL_op = pop->op_next) &&
8990e307 6598 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 6599 !(pop->op_next->op_private &
68dc0745 6600 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 6601 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 6602 <= 255 &&
8990e307
LW		 6603 i >= 0)
6604 {
350de78d 6605 GV *gv;
a0d0e21e 6606 null(o->op_next);
8990e307
LW		 6607 null(pop->op_next);
6608 null(pop);
a0d0e21e
LW		 6609 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
6610 o->op_next = pop->op_next->op_next;
6611 o->op_type = OP_AELEMFAST;
22c35a8c 6612 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 6613 o->op_private = (U8)i;
638eceb6 6614 gv = cGVOPo_gv;
350de78d 6615 GvAVn(gv);
8990e307 6616 }
79072805 6617 }
e476b1b5 6618 else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) {
638eceb6 6619 GV *gv = cGVOPo_gv;
76cd736e
GS		 6620 if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX(GvCV(gv))) {
6621 /* XXX could check prototype here instead of just carping */
6622 SV *sv = sv_newmortal();
6623 gv_efullname3(sv, gv, Nullch);
e476b1b5 6624 Perl_warner(aTHX_ WARN_PROTOTYPE,
76cd736e
GS		 6625 "%s() called too early to check prototype",
6626 SvPV_nolen(sv));
6627 }
6628 }
6629
3280af22 6630 o->op_seq = PL_op_seqmax++;
79072805
LW		 6631 break;
6632
a0d0e21e 6633 case OP_MAPWHILE:
79072805
LW		 6634 case OP_GREPWHILE:
6635 case OP_AND:
6636 case OP_OR:
2c2d71f5
JH		 6637 case OP_ANDASSIGN:
6638 case OP_ORASSIGN:
1a67a97c
SM		 6639 case OP_COND_EXPR:
6640 case OP_RANGE:
3280af22 6641 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 6642 while (cLOGOP->op_other->op_type == OP_NULL)
6643 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 6644 peep(cLOGOP->op_other);
6645 break;
6646
79072805 6647 case OP_ENTERLOOP:
3280af22 6648 o->op_seq = PL_op_seqmax++;
79072805
LW		 6649 peep(cLOOP->op_redoop);
6650 peep(cLOOP->op_nextop);
6651 peep(cLOOP->op_lastop);
6652 break;
6653
8782bef2 6654 case OP_QR:
79072805
LW		 6655 case OP_MATCH:
6656 case OP_SUBST:
3280af22 6657 o->op_seq = PL_op_seqmax++;
a0d0e21e 6658 peep(cPMOP->op_pmreplstart);
79072805
LW		 6659 break;
6660
a0d0e21e 6661 case OP_EXEC:
3280af22 6662 o->op_seq = PL_op_seqmax++;
1c846c1f 6663 if (ckWARN(WARN_SYNTAX) && o->op_next
599cee73 6664 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 6665 if (o->op_next->op_sibling &&
20408e3c
GS		 6666 o->op_next->op_sibling->op_type != OP_EXIT &&
6667 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 6668 o->op_next->op_sibling->op_type != OP_DIE) {
57843af0 6669 line_t oldline = CopLINE(PL_curcop);
a0d0e21e 6670
57843af0 6671 CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next));
eeb6a2c9
GS		 6672 Perl_warner(aTHX_ WARN_EXEC,
6673 "Statement unlikely to be reached");
6674 Perl_warner(aTHX_ WARN_EXEC,
cc507455 6675 "\t(Maybe you meant system() when you said exec()?)\n");
57843af0 6676 CopLINE_set(PL_curcop, oldline);
a0d0e21e
LW		 6677 }
6678 }
6679 break;
aeea060c 6680
c750a3ec
MB		 6681 case OP_HELEM: {
6682 UNOP *rop;
6683 SV *lexname;
6684 GV **fields;
9615e741 6685 SV **svp, **indsvp, *sv;
c750a3ec 6686 I32 ind;
1c846c1f 6687 char *key = NULL;
c750a3ec 6688 STRLEN keylen;
aeea060c 6689
9615e741 6690 o->op_seq = PL_op_seqmax++;
1c846c1f
NIS		 6691
6692 if (((BINOP*)o)->op_last->op_type != OP_CONST)
c750a3ec 6693 break;
1c846c1f
NIS		 6694
6695 /* Make the CONST have a shared SV */
6696 svp = cSVOPx_svp(((BINOP*)o)->op_last);
3049cdab 6697 if ((!SvFAKE(sv = *svp) || !SvREADONLY(sv)) && !IS_PADCONST(sv)) {
1c846c1f
NIS		 6698 key = SvPV(sv, keylen);
6699 lexname = newSVpvn_share(key, keylen, 0);
6700 SvREFCNT_dec(sv);
6701 *svp = lexname;
6702 }
6703
6704 if ((o->op_private & (OPpLVAL_INTRO)))
6705 break;
6706
c750a3ec
MB		 6707 rop = (UNOP*)((BINOP*)o)->op_first;
6708 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6709 break;
3280af22 6710 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 6711 if (!SvOBJECT(lexname))
6712 break;
5196be3e 6713 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 6714 if (!fields || !GvHV(*fields))
6715 break;
c750a3ec
MB		 6716 key = SvPV(*svp, keylen);
6717 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6718 if (!indsvp) {
88e9b055 6719 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" in variable %s of type %s",
2d8e6c8d 6720 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 6721 }
6722 ind = SvIV(*indsvp);
6723 if (ind < 1)
cea2e8a9 6724 Perl_croak(aTHX_ "Bad index while coercing array into hash");
c750a3ec 6725 rop->op_type = OP_RV2AV;
22c35a8c 6726 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 6727 o->op_type = OP_AELEM;
22c35a8c 6728 o->op_ppaddr = PL_ppaddr[OP_AELEM];
9615e741
GS		 6729 sv = newSViv(ind);
6730 if (SvREADONLY(*svp))
6731 SvREADONLY_on(sv);
6732 SvFLAGS(sv) |= (SvFLAGS(*svp)
6733 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
c750a3ec 6734 SvREFCNT_dec(*svp);
9615e741 6735 *svp = sv;
c750a3ec
MB		 6736 break;
6737 }
345599ca
GS		 6738
6739 case OP_HSLICE: {
6740 UNOP *rop;
6741 SV *lexname;
6742 GV **fields;
9615e741 6743 SV **svp, **indsvp, *sv;
345599ca
GS		 6744 I32 ind;
6745 char *key;
6746 STRLEN keylen;
6747 SVOP *first_key_op, *key_op;
9615e741
GS		 6748
6749 o->op_seq = PL_op_seqmax++;
345599ca
GS		 6750 if ((o->op_private & (OPpLVAL_INTRO))
6751 /* I bet there's always a pushmark... */
6752 || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST)
6753 /* hmmm, no optimization if list contains only one key. */
6754 break;
6755 rop = (UNOP*)((LISTOP*)o)->op_last;
6756 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
6757 break;
6758 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
6759 if (!SvOBJECT(lexname))
6760 break;
6761 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
6762 if (!fields || !GvHV(*fields))
6763 break;
6764 /* Again guessing that the pushmark can be jumped over.... */
6765 first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling)
6766 ->op_first->op_sibling;
6767 /* Check that the key list contains only constants. */
6768 for (key_op = first_key_op; key_op;
6769 key_op = (SVOP*)key_op->op_sibling)
6770 if (key_op->op_type != OP_CONST)
6771 break;
6772 if (key_op)
6773 break;
6774 rop->op_type = OP_RV2AV;
6775 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
6776 o->op_type = OP_ASLICE;
6777 o->op_ppaddr = PL_ppaddr[OP_ASLICE];
6778 for (key_op = first_key_op; key_op;
6779 key_op = (SVOP*)key_op->op_sibling) {
6780 svp = cSVOPx_svp(key_op);
6781 key = SvPV(*svp, keylen);
6782 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
6783 if (!indsvp) {
9615e741
GS		 6784 Perl_croak(aTHX_ "No such pseudo-hash field \"%s\" "
6785 "in variable %s of type %s",
345599ca
GS		 6786 key, SvPV(lexname, n_a), HvNAME(SvSTASH(lexname)));
6787 }
6788 ind = SvIV(*indsvp);
6789 if (ind < 1)
6790 Perl_croak(aTHX_ "Bad index while coercing array into hash");
9615e741
GS		 6791 sv = newSViv(ind);
6792 if (SvREADONLY(*svp))
6793 SvREADONLY_on(sv);
6794 SvFLAGS(sv) |= (SvFLAGS(*svp)
6795 & (SVs_PADBUSY|SVs_PADTMP|SVs_PADMY));
345599ca 6796 SvREFCNT_dec(*svp);
9615e741 6797 *svp = sv;
345599ca
GS		 6798 }
6799 break;
6800 }
c750a3ec 6801
cd06dffe
GS		 6802 case OP_RV2AV:
6803 case OP_RV2HV:
6804 if (!(o->op_flags & OPf_WANT)
e1f15930
GS		 6805 || (o->op_flags & OPf_WANT) == OPf_WANT_LIST)
6806 {
cd06dffe 6807 last_composite = o;
e1f15930 6808 }
cd06dffe
GS		 6809 o->op_seq = PL_op_seqmax++;
6810 break;
6811
6812 case OP_RETURN:
970c4905 6813 if (o->op_next && o->op_next->op_type != OP_LEAVESUBLV) {
cd06dffe
GS		 6814 o->op_seq = PL_op_seqmax++;
6815 break;
6816 }
6817 /* FALL THROUGH */
6818
6819 case OP_LEAVESUBLV:
6820 if (last_composite) {
6821 OP *r = last_composite;
6822
6823 while (r->op_sibling)
6824 r = r->op_sibling;
1c846c1f 6825 if (r->op_next == o
cd06dffe
GS		 6826 || (r->op_next->op_type == OP_LIST
6827 && r->op_next->op_next == o))
6828 {
6829 if (last_composite->op_type == OP_RV2AV)
6830 yyerror("Lvalue subs returning arrays not implemented yet");
6831 else
6832 yyerror("Lvalue subs returning hashes not implemented yet");
6833 ;
6834 }
6835 }
6836 /* FALL THROUGH */
6837
79072805 6838 default:
3280af22 6839 o->op_seq = PL_op_seqmax++;
79072805
LW		 6840 break;
6841 }
a0d0e21e 6842 oldop = o;
79072805 6843 }
a0d0e21e 6844 LEAVE;
79072805 6845}
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