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remove doubled hunk from integration
[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, 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"
19#include "perl.h"
20
76e3520e
GS		 21#ifdef PERL_OBJECT
22#define CHECKCALL this->*check
23#else
24#define CHECKCALL *check
25#endif
26
e50aee73 27/*
5dc0d613 28 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 29 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 30 */
11343788 31#define CHECKOP(type,o) \
3280af22 32 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 33 ? ( op_free((OP*)o), \
28757baa 34 croak("%s trapped by operation mask", op_desc[type]), \
35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
c53d7c7d
HS		 38#define PAD_MAX 999999999
39
76e3520e
GS		 40static bool scalar_mod_type _((OP *o, I32 type));
41#ifndef PERL_OBJECT
11343788 42static I32 list_assignment _((OP *o));
3bc5dc61 43static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 44static OP *modkids _((OP *o, I32 type));
45static OP *no_fh_allowed _((OP *o));
46static OP *scalarboolean _((OP *o));
47static OP *too_few_arguments _((OP *o, char* name));
48static OP *too_many_arguments _((OP *o, char* name));
49static void null _((OP* o));
bbce6d69 50static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
155fc61f 51 CV* startcv, I32 cx_ix, I32 saweval));
54b9620d 52static OP *newDEFSVOP _((void));
883ffac3 53static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 54#endif
79072805 55
76e3520e 56STATIC char*
8ac85365 57gv_ename(GV *gv)
4633a7c4
LW		 58{
59 SV* tmpsv = sv_newmortal();
46fc3d4c 60 gv_efullname3(tmpsv, gv, Nullch);
3280af22 61 return SvPV(tmpsv,PL_na);
4633a7c4
LW		 62}
63
76e3520e 64STATIC OP *
8ac85365 65no_fh_allowed(OP *o)
79072805 66{
46fc3d4c 67 yyerror(form("Missing comma after first argument to %s function",
5196be3e 68 op_desc[o->op_type]));
11343788 69 return o;
79072805
LW		 70}
71
76e3520e 72STATIC OP *
8ac85365 73too_few_arguments(OP *o, char *name)
79072805 74{
46fc3d4c 75 yyerror(form("Not enough arguments for %s", name));
11343788 76 return o;
79072805
LW		 77}
78
76e3520e 79STATIC OP *
8ac85365 80too_many_arguments(OP *o, char *name)
79072805 81{
46fc3d4c 82 yyerror(form("Too many arguments for %s", name));
11343788 83 return o;
79072805
LW		 84}
85
76e3520e 86STATIC void
8ac85365 87bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 88{
46fc3d4c 89 yyerror(form("Type of arg %d to %s must be %s (not %s)",
90 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 91}
92
a0d0e21e 93void
8ac85365 94assertref(OP *o)
a0d0e21e 95{
11343788 96 int type = o->op_type;
136254bc 97 if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
46fc3d4c 98 yyerror(form("Can't use subscript on %s", op_desc[type]));
bde90e66 99 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 100 dTHR;
bde90e66
HS		 101 SV *msg = sv_2mortal(
102 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
103 type == OP_ENTERSUB ? '&' : '%'));
3280af22 104 if (PL_in_eval & 2)
bde90e66 105 warn("%_", msg);
3280af22
NIS		 106 else if (PL_in_eval)
107 sv_catsv(GvSV(PL_errgv), msg);
bde90e66
HS		 108 else
109 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
110 }
a0d0e21e
LW		 111 }
112}
113
79072805
LW		 114/* "register" allocation */
115
116PADOFFSET
8ac85365 117pad_allocmy(char *name)
93a17b20 118{
11343788 119 dTHR;
a0d0e21e
LW		 120 PADOFFSET off;
121 SV *sv;
122
834a4ddd
LW		 123 if (!(
124 isALPHA(name[1]) ||
125 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
126 name[1] == '_' && (int)strlen(name) > 2))
127 {
46fc3d4c 128 if (!isPRINT(name[1])) {
129 name[3] = '\0';
130 name[2] = toCTRL(name[1]);
131 name[1] = '^';
132 }
a0d0e21e
LW		 133 croak("Can't use global %s in \"my\"",name);
134 }
599cee73 135 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 136 SV **svp = AvARRAY(PL_comppad_name);
137 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 138 if ((sv = svp[off])
3280af22 139 && sv != &PL_sv_undef
c53d7c7d 140 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 141 && strEQ(name, SvPVX(sv)))
142 {
599cee73 143 warner(WARN_UNSAFE,
9fbbe825 144 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 145 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 146 break;
147 }
148 }
149 }
a0d0e21e
LW		 150 off = pad_alloc(OP_PADSV, SVs_PADMY);
151 sv = NEWSV(1102,0);
93a17b20
LW		 152 sv_upgrade(sv, SVt_PVNV);
153 sv_setpv(sv, name);
3280af22 154 if (PL_in_my_stash) {
c750a3ec
MB		 155 if (*name != '$')
156 croak("Can't declare class for non-scalar %s in \"my\"",name);
157 SvOBJECT_on(sv);
158 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 159 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
160 PL_sv_objcount++;
c750a3ec 161 }
3280af22 162 av_store(PL_comppad_name, off, sv);
c53d7c7d 163 SvNVX(sv) = (double)PAD_MAX;
8990e307 164 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 165 if (!PL_min_intro_pending)
166 PL_min_intro_pending = off;
167 PL_max_intro_pending = off;
93a17b20 168 if (*name == '@')
3280af22 169 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 170 else if (*name == '%')
3280af22
NIS		 171 av_store(PL_comppad, off, (SV*)newHV());
172 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 173 return off;
174}
175
76e3520e 176STATIC PADOFFSET
155fc61f 177pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix, I32 saweval)
93a17b20 178{
11343788 179 dTHR;
748a9306 180 CV *cv;
93a17b20
LW		 181 I32 off;
182 SV *sv;
93a17b20 183 register I32 i;
c09156bb 184 register PERL_CONTEXT *cx;
93a17b20 185
748a9306 186 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 187 AV *curlist = CvPADLIST(cv);
188 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 189 AV *curname;
4fdae800 190
3280af22 191 if (!svp || *svp == &PL_sv_undef)
4633a7c4 192 continue;
748a9306
LW		 193 curname = (AV*)*svp;
194 svp = AvARRAY(curname);
93965878 195 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 196 if ((sv = svp[off]) &&
3280af22 197 sv != &PL_sv_undef &&
748a9306 198 seq <= SvIVX(sv) &&
13826f2c 199 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 200 strEQ(SvPVX(sv), name))
201 {
5f05dabc 202 I32 depth;
203 AV *oldpad;
204 SV *oldsv;
205
206 depth = CvDEPTH(cv);
207 if (!depth) {
9607fc9c 208 if (newoff) {
209 if (SvFAKE(sv))
210 continue;
4fdae800 211 return 0; /* don't clone from inactive stack frame */
9607fc9c 212 }
5f05dabc 213 depth = 1;
214 }
215 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
216 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 217 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 218 SV *namesv = NEWSV(1103,0);
748a9306 219 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 220 sv_upgrade(namesv, SVt_PVNV);
221 sv_setpv(namesv, name);
3280af22
NIS		 222 av_store(PL_comppad_name, newoff, namesv);
223 SvNVX(namesv) = (double)PL_curcop->cop_seq;
c53d7c7d 224 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 225 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 226 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 230 PL_sv_objcount++;
231 }
3280af22 232 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 233 /* "It's closures all the way down." */
3280af22 234 CvCLONE_on(PL_compcv);
54310121 235 if (cv == startcv) {
3280af22 236 if (CvANON(PL_compcv))
54310121 237 oldsv = Nullsv; /* no need to keep ref */
238 }
239 else {
28757baa 240 CV *bcv;
241 for (bcv = startcv;
242 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 243 bcv = CvOUTSIDE(bcv))
244 {
28757baa 245 if (CvANON(bcv))
246 CvCLONE_on(bcv);
247 else {
6b35e009
GS		 248 if (ckWARN(WARN_CLOSURE)
249 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
250 {
599cee73 251 warner(WARN_CLOSURE,
44a8e56a 252 "Variable \"%s\" may be unavailable",
28757baa 253 name);
6b35e009 254 }
28757baa 255 break;
256 }
257 }
258 }
259 }
3280af22 260 else if (!CvUNIQUE(PL_compcv)) {
599cee73
PM		 261 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
262 warner(WARN_CLOSURE,
263 "Variable \"%s\" will not stay shared", name);
5f05dabc 264 }
748a9306 265 }
3280af22 266 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 267 return newoff;
268 }
93a17b20
LW		 269 }
270 }
271
272 /* Nothing in current lexical context--try eval's context, if any.
273 * This is necessary to let the perldb get at lexically scoped variables.
274 * XXX This will also probably interact badly with eval tree caching.
275 */
276
748a9306 277 for (i = cx_ix; i >= 0; i--) {
93a17b20 278 cx = &cxstack[i];
6b35e009 279 switch (CxTYPE(cx)) {
93a17b20 280 default:
748a9306
LW		 281 if (i == 0 && saweval) {
282 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 283 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval);
748a9306 284 }
93a17b20
LW		 285 break;
286 case CXt_EVAL:
44a8e56a 287 switch (cx->blk_eval.old_op_type) {
288 case OP_ENTEREVAL:
6b35e009
GS		 289 if (CxREALEVAL(cx))
290 saweval = i;
44a8e56a 291 break;
292 case OP_REQUIRE:
293 /* require must have its own scope */
294 return 0;
295 }
93a17b20
LW		 296 break;
297 case CXt_SUB:
298 if (!saweval)
299 return 0;
300 cv = cx->blk_sub.cv;
3280af22 301 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 302 saweval = i; /* so we know where we were called from */
93a17b20 303 continue;
93a17b20 304 }
748a9306 305 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 306 return pad_findlex(name, newoff, seq, cv, i-1, saweval);
93a17b20
LW		 307 }
308 }
309
748a9306
LW		 310 return 0;
311}
a0d0e21e 312
748a9306 313PADOFFSET
8ac85365 314pad_findmy(char *name)
748a9306 315{
11343788 316 dTHR;
748a9306 317 I32 off;
54310121 318 I32 pendoff = 0;
748a9306 319 SV *sv;
3280af22
NIS		 320 SV **svp = AvARRAY(PL_comppad_name);
321 U32 seq = PL_cop_seqmax;
6b35e009 322 PERL_CONTEXT *cx;
33b8ce05 323 CV *outside;
748a9306 324
11343788
MB		 325#ifdef USE_THREADS
326 /*
327 * Special case to get lexical (and hence per-thread) @_.
328 * XXX I need to find out how to tell at parse-time whether use
329 * of @_ should refer to a lexical (from a sub) or defgv (global
330 * scope and maybe weird sub-ish things like formats). See
331 * startsub in perly.y. It's possible that @_ could be lexical
332 * (at least from subs) even in non-threaded perl.
333 */
334 if (strEQ(name, "@_"))
335 return 0; /* success. (NOT_IN_PAD indicates failure) */
336#endif /* USE_THREADS */
337
748a9306 338 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 339 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 340 if ((sv = svp[off]) &&
3280af22 341 sv != &PL_sv_undef &&
54310121 342 (!SvIVX(sv) ||
343 (seq <= SvIVX(sv) &&
344 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 345 strEQ(SvPVX(sv), name))
346 {
54310121 347 if (SvIVX(sv))
348 return (PADOFFSET)off;
349 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 350 }
351 }
748a9306 352
33b8ce05
GS		 353 outside = CvOUTSIDE(PL_compcv);
354
355 /* Check if if we're compiling an eval'', and adjust seq to be the
356 * eval's seq number. This depends on eval'' having a non-null
357 * CvOUTSIDE() while it is being compiled. The eval'' itself is
358 * identified by CvUNIQUE being set and CvGV being null. */
359 if (outside && CvUNIQUE(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 360 cx = &cxstack[cxstack_ix];
361 if (CxREALEVAL(cx))
362 seq = cx->blk_oldcop->cop_seq;
363 }
364
748a9306 365 /* See if it's in a nested scope */
33b8ce05 366 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0);
54310121 367 if (off) {
368 /* If there is a pending local definition, this new alias must die */
369 if (pendoff)
3280af22 370 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 371 return off; /* pad_findlex returns 0 for failure...*/
54310121 372 }
11343788 373 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 374}
375
376void
8ac85365 377pad_leavemy(I32 fill)
93a17b20
LW		 378{
379 I32 off;
3280af22 380 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 381 SV *sv;
3280af22
NIS		 382 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
383 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
384 if ((sv = svp[off]) && sv != &PL_sv_undef)
8990e307
LW		 385 warn("%s never introduced", SvPVX(sv));
386 }
387 }
388 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 389 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 390 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 391 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 392 }
393}
394
395PADOFFSET
8ac85365 396pad_alloc(I32 optype, U32 tmptype)
79072805 397{
11343788 398 dTHR;
79072805
LW		 399 SV *sv;
400 I32 retval;
401
3280af22 402 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 403 croak("panic: pad_alloc");
3280af22 404 if (PL_pad_reset_pending)
a0d0e21e 405 pad_reset();
ed6116ce 406 if (tmptype & SVs_PADMY) {
79072805 407 do {
3280af22 408 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 409 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 410 retval = AvFILLp(PL_comppad);
79072805
LW		 411 }
412 else {
3280af22
NIS		 413 SV **names = AvARRAY(PL_comppad_name);
414 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 415 for (;;) {
416 /*
417 * "foreach" index vars temporarily become aliases to non-"my"
418 * values. Thus we must skip, not just pad values that are
419 * marked as current pad values, but also those with names.
420 */
3280af22
NIS		 421 if (++PL_padix <= names_fill &&
422 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 423 continue;
3280af22 424 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 425 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
426 break;
427 }
3280af22 428 retval = PL_padix;
79072805 429 }
8990e307 430 SvFLAGS(sv) |= tmptype;
3280af22 431 PL_curpad = AvARRAY(PL_comppad);
11343788 432#ifdef USE_THREADS
5dc0d613 433 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 434 (unsigned long) thr, (unsigned long) PL_curpad,
5dc0d613 435 (long) retval, op_name[optype]));
11343788 436#else
d9bb4600 437 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 438 (unsigned long) PL_curpad,
5dc0d613 439 (long) retval, op_name[optype]));
11343788 440#endif /* USE_THREADS */
79072805
LW		 441 return (PADOFFSET)retval;
442}
443
444SV *
8990e307 445pad_sv(PADOFFSET po)
79072805 446{
11343788
MB		 447 dTHR;
448#ifdef USE_THREADS
5dc0d613 449 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 450 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 451#else
79072805 452 if (!po)
463ee0b2 453 croak("panic: pad_sv po");
d9bb4600 454 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 455 (unsigned long) PL_curpad, po));
11343788 456#endif /* USE_THREADS */
3280af22 457 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 458}
459
460void
8990e307 461pad_free(PADOFFSET po)
79072805 462{
11343788 463 dTHR;
3280af22 464 if (!PL_curpad)
a0d0e21e 465 return;
3280af22 466 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 467 croak("panic: pad_free curpad");
79072805 468 if (!po)
463ee0b2 469 croak("panic: pad_free po");
11343788 470#ifdef USE_THREADS
5dc0d613 471 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 472 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 473#else
d9bb4600 474 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 475 (unsigned long) PL_curpad, po));
11343788 476#endif /* USE_THREADS */
3280af22
NIS		 477 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
478 SvPADTMP_off(PL_curpad[po]);
479 if ((I32)po < PL_padix)
480 PL_padix = po - 1;
79072805
LW		 481}
482
483void
8990e307 484pad_swipe(PADOFFSET po)
79072805 485{
11343788 486 dTHR;
3280af22 487 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 488 croak("panic: pad_swipe curpad");
79072805 489 if (!po)
463ee0b2 490 croak("panic: pad_swipe po");
11343788 491#ifdef USE_THREADS
5dc0d613 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 493 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 494#else
d9bb4600 495 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 496 (unsigned long) PL_curpad, po));
11343788 497#endif /* USE_THREADS */
3280af22
NIS		 498 SvPADTMP_off(PL_curpad[po]);
499 PL_curpad[po] = NEWSV(1107,0);
500 SvPADTMP_on(PL_curpad[po]);
501 if ((I32)po < PL_padix)
502 PL_padix = po - 1;
79072805
LW		 503}
504
d9bb4600
GS		 505/* XXX pad_reset() is currently disabled because it results in serious bugs.
506 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
507 * on the stack by OPs that use them, there are several ways to get an alias
508 * to a shared TARG. Such an alias will change randomly and unpredictably.
509 * We avoid doing this until we can think of a Better Way.
510 * GSAR 97-10-29 */
79072805 511void
8ac85365 512pad_reset(void)
79072805 513{
d9bb4600 514#ifdef USE_BROKEN_PAD_RESET
11343788 515 dTHR;
79072805
LW		 516 register I32 po;
517
6b88bc9c 518 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 519 croak("panic: pad_reset curpad");
11343788 520#ifdef USE_THREADS
5dc0d613 521 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 522 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 523#else
d9bb4600 524 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 525 (unsigned long) PL_curpad));
11343788 526#endif /* USE_THREADS */
6b88bc9c
GS		 527 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
528 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
529 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
530 SvPADTMP_off(PL_curpad[po]);
748a9306 531 }
6b88bc9c 532 PL_padix = PL_padix_floor;
79072805 533 }
d9bb4600 534#endif
3280af22 535 PL_pad_reset_pending = FALSE;
79072805
LW		 536}
537
a863c7d1 538#ifdef USE_THREADS
54b9620d 539/* find_threadsv is not reentrant */
a863c7d1 540PADOFFSET
54b9620d 541find_threadsv(char *name)
a863c7d1
MB		 542{
543 dTHR;
544 char *p;
545 PADOFFSET key;
554b3eca 546 SV **svp;
54b9620d 547 /* We currently only handle names of a single character */
533c011a 548 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 549 if (!p)
550 return NOT_IN_PAD;
533c011a 551 key = p - PL_threadsv_names;
54b9620d 552 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 553 if (!svp) {
554 SV *sv = NEWSV(0, 0);
54b9620d 555 av_store(thr->threadsv, key, sv);
940cb80d 556 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 557 /*
558 * Some magic variables used to be automagically initialised
559 * in gv_fetchpv. Those which are now per-thread magicals get
560 * initialised here instead.
561 */
562 switch (*name) {
54b9620d
MB		 563 case '_':
564 break;
554b3eca
MB		 565 case ';':
566 sv_setpv(sv, "\034");
54b9620d 567 sv_magic(sv, 0, 0, name, 1);
554b3eca 568 break;
c277df42
IZ		 569 case '&':
570 case '`':
571 case '\'':
533c011a 572 PL_sawampersand = TRUE;
c277df42 573 SvREADONLY_on(sv);
d8b5173a 574 /* FALL THROUGH */
067391ea
GS		 575
576 /* XXX %! tied to Errno.pm needs to be added here.
577 * See gv_fetchpv(). */
578 /* case '!': */
579
54b9620d
MB		 580 default:
581 sv_magic(sv, 0, 0, name, 1);
554b3eca 582 }
8b73bbec 583 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 584 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 585 sv, (*name < 32) ? "^" : "",
586 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 587 }
588 return key;
589}
590#endif /* USE_THREADS */
591
79072805
LW		 592/* Destructor */
593
594void
8ac85365 595op_free(OP *o)
79072805 596{
85e6fe83 597 register OP *kid, *nextkid;
79072805 598
5dc0d613 599 if (!o || o->op_seq == (U16)-1)
79072805
LW		 600 return;
601
11343788
MB		 602 if (o->op_flags & OPf_KIDS) {
603 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 604 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 605 op_free(kid);
85e6fe83 606 }
79072805
LW		 607 }
608
11343788 609 switch (o->op_type) {
8990e307 610 case OP_NULL:
11343788 611 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 612 break;
a0d0e21e 613 case OP_ENTEREVAL:
11343788 614 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 615 break;
554b3eca 616#ifdef USE_THREADS
8dd3ba40
SM		 617 case OP_ENTERITER:
618 if (!(o->op_flags & OPf_SPECIAL))
619 break;
620 /* FALL THROUGH */
2faa37cc 621 case OP_THREADSV:
54b9620d 622 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 623 break;
624#endif /* USE_THREADS */
a6006777 625 default:
ac4c12e7
GS		 626 if (!(o->op_flags & OPf_REF)
627 || (check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 628 break;
629 /* FALL THROUGH */
463ee0b2 630 case OP_GVSV:
79072805 631 case OP_GV:
a6006777 632 case OP_AELEMFAST:
11343788 633 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 634 break;
635 case OP_NEXTSTATE:
636 case OP_DBSTATE:
5196be3e 637 Safefree(cCOPo->cop_label);
11343788 638 SvREFCNT_dec(cCOPo->cop_filegv);
599cee73
PM		 639 if (cCOPo->cop_warnings != WARN_NONE && cCOPo->cop_warnings != WARN_ALL)
640 SvREFCNT_dec(cCOPo->cop_warnings);
79072805
LW		 641 break;
642 case OP_CONST:
11343788 643 SvREFCNT_dec(cSVOPo->op_sv);
79072805 644 break;
748a9306
LW		 645 case OP_GOTO:
646 case OP_NEXT:
647 case OP_LAST:
648 case OP_REDO:
11343788 649 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 650 break;
651 /* FALL THROUGH */
a0d0e21e 652 case OP_TRANS:
a0ed51b3
LW		 653 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
654 SvREFCNT_dec(cSVOPo->op_sv);
655 else
656 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 657 break;
658 case OP_SUBST:
11343788 659 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 660 /* FALL THROUGH */
748a9306 661 case OP_PUSHRE:
a0d0e21e 662 case OP_MATCH:
8782bef2 663 case OP_QR:
c277df42 664 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 665 break;
79072805
LW		 666 }
667
11343788
MB		 668 if (o->op_targ > 0)
669 pad_free(o->op_targ);
8990e307 670
11343788 671 Safefree(o);
79072805
LW		 672}
673
76e3520e 674STATIC void
8ac85365 675null(OP *o)
8990e307 676{
54b9620d 677 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 678 pad_free(o->op_targ);
679 o->op_targ = o->op_type;
680 o->op_type = OP_NULL;
681 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 682}
683
79072805
LW		 684/* Contextualizers */
685
463ee0b2 686#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 687
688OP *
8ac85365 689linklist(OP *o)
79072805
LW		 690{
691 register OP *kid;
692
11343788
MB		 693 if (o->op_next)
694 return o->op_next;
79072805
LW		 695
696 /* establish postfix order */
11343788
MB		 697 if (cUNOPo->op_first) {
698 o->op_next = LINKLIST(cUNOPo->op_first);
699 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 700 if (kid->op_sibling)
701 kid->op_next = LINKLIST(kid->op_sibling);
702 else
11343788 703 kid->op_next = o;
79072805
LW		 704 }
705 }
706 else
11343788 707 o->op_next = o;
79072805 708
11343788 709 return o->op_next;
79072805
LW		 710}
711
712OP *
8ac85365 713scalarkids(OP *o)
79072805
LW		 714{
715 OP *kid;
11343788
MB		 716 if (o && o->op_flags & OPf_KIDS) {
717 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 718 scalar(kid);
719 }
11343788 720 return o;
79072805
LW		 721}
722
76e3520e 723STATIC OP *
8ac85365 724scalarboolean(OP *o)
8990e307 725{
d008e5eb 726 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 727 dTHR;
d008e5eb
GS		 728 if (ckWARN(WARN_SYNTAX)) {
729 line_t oldline = PL_curcop->cop_line;
a0d0e21e 730
d008e5eb
GS		 731 if (PL_copline != NOLINE)
732 PL_curcop->cop_line = PL_copline;
733 warner(WARN_SYNTAX, "Found = in conditional, should be ==");
734 PL_curcop->cop_line = oldline;
735 }
a0d0e21e 736 }
11343788 737 return scalar(o);
8990e307
LW		 738}
739
740OP *
8ac85365 741scalar(OP *o)
79072805
LW		 742{
743 OP *kid;
744
a0d0e21e 745 /* assumes no premature commitment */
3280af22 746 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 747 || o->op_type == OP_RETURN)
11343788 748 return o;
79072805 749
5dc0d613 750 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 751
11343788 752 switch (o->op_type) {
79072805 753 case OP_REPEAT:
11343788
MB		 754 if (o->op_private & OPpREPEAT_DOLIST)
755 null(((LISTOP*)cBINOPo->op_first)->op_first);
756 scalar(cBINOPo->op_first);
8990e307 757 break;
79072805
LW		 758 case OP_OR:
759 case OP_AND:
760 case OP_COND_EXPR:
11343788 761 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 762 scalar(kid);
79072805 763 break;
a0d0e21e 764 case OP_SPLIT:
11343788 765 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 766 if (!kPMOP->op_pmreplroot)
767 deprecate("implicit split to @_");
768 }
769 /* FALL THROUGH */
79072805 770 case OP_MATCH:
8782bef2 771 case OP_QR:
79072805
LW		 772 case OP_SUBST:
773 case OP_NULL:
8990e307 774 default:
11343788
MB		 775 if (o->op_flags & OPf_KIDS) {
776 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 777 scalar(kid);
778 }
79072805
LW		 779 break;
780 case OP_LEAVE:
781 case OP_LEAVETRY:
5dc0d613 782 kid = cLISTOPo->op_first;
54310121 783 scalar(kid);
784 while (kid = kid->op_sibling) {
785 if (kid->op_sibling)
786 scalarvoid(kid);
787 else
788 scalar(kid);
789 }
3280af22 790 WITH_THR(PL_curcop = &PL_compiling);
54310121 791 break;
748a9306 792 case OP_SCOPE:
79072805 793 case OP_LINESEQ:
8990e307 794 case OP_LIST:
11343788 795 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 796 if (kid->op_sibling)
797 scalarvoid(kid);
798 else
799 scalar(kid);
800 }
3280af22 801 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 802 break;
803 }
11343788 804 return o;
79072805
LW		 805}
806
807OP *
8ac85365 808scalarvoid(OP *o)
79072805
LW		 809{
810 OP *kid;
8990e307
LW		 811 char* useless = 0;
812 SV* sv;
79072805 813
54310121 814 /* assumes no premature commitment */
3280af22 815 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || PL_error_count
5dc0d613 816 || o->op_type == OP_RETURN)
11343788 817 return o;
79072805 818
5dc0d613 819 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 820
11343788 821 switch (o->op_type) {
79072805 822 default:
11343788 823 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 824 break;
36477c24 825 /* FALL THROUGH */
826 case OP_REPEAT:
11343788 827 if (o->op_flags & OPf_STACKED)
8990e307 828 break;
5d82c453
GA		 829 goto func_ops;
830 case OP_SUBSTR:
831 if (o->op_private == 4)
832 break;
8990e307
LW		 833 /* FALL THROUGH */
834 case OP_GVSV:
835 case OP_WANTARRAY:
836 case OP_GV:
837 case OP_PADSV:
838 case OP_PADAV:
839 case OP_PADHV:
840 case OP_PADANY:
841 case OP_AV2ARYLEN:
8990e307 842 case OP_REF:
a0d0e21e
LW		 843 case OP_REFGEN:
844 case OP_SREFGEN:
8990e307
LW		 845 case OP_DEFINED:
846 case OP_HEX:
847 case OP_OCT:
848 case OP_LENGTH:
8990e307
LW		 849 case OP_VEC:
850 case OP_INDEX:
851 case OP_RINDEX:
852 case OP_SPRINTF:
853 case OP_AELEM:
854 case OP_AELEMFAST:
855 case OP_ASLICE:
8990e307
LW		 856 case OP_HELEM:
857 case OP_HSLICE:
858 case OP_UNPACK:
859 case OP_PACK:
8990e307
LW		 860 case OP_JOIN:
861 case OP_LSLICE:
862 case OP_ANONLIST:
863 case OP_ANONHASH:
864 case OP_SORT:
865 case OP_REVERSE:
866 case OP_RANGE:
867 case OP_FLIP:
868 case OP_FLOP:
869 case OP_CALLER:
870 case OP_FILENO:
871 case OP_EOF:
872 case OP_TELL:
873 case OP_GETSOCKNAME:
874 case OP_GETPEERNAME:
875 case OP_READLINK:
876 case OP_TELLDIR:
877 case OP_GETPPID:
878 case OP_GETPGRP:
879 case OP_GETPRIORITY:
880 case OP_TIME:
881 case OP_TMS:
882 case OP_LOCALTIME:
883 case OP_GMTIME:
884 case OP_GHBYNAME:
885 case OP_GHBYADDR:
886 case OP_GHOSTENT:
887 case OP_GNBYNAME:
888 case OP_GNBYADDR:
889 case OP_GNETENT:
890 case OP_GPBYNAME:
891 case OP_GPBYNUMBER:
892 case OP_GPROTOENT:
893 case OP_GSBYNAME:
894 case OP_GSBYPORT:
895 case OP_GSERVENT:
896 case OP_GPWNAM:
897 case OP_GPWUID:
898 case OP_GGRNAM:
899 case OP_GGRGID:
900 case OP_GETLOGIN:
5d82c453 901 func_ops:
11343788
MB		 902 if (!(o->op_private & OPpLVAL_INTRO))
903 useless = op_desc[o->op_type];
8990e307
LW		 904 break;
905
906 case OP_RV2GV:
907 case OP_RV2SV:
908 case OP_RV2AV:
909 case OP_RV2HV:
11343788
MB		 910 if (!(o->op_private & OPpLVAL_INTRO) &&
911 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 912 useless = "a variable";
913 break;
79072805 914
93a17b20 915 case OP_NEXTSTATE:
8990e307 916 case OP_DBSTATE:
3280af22 917 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 918 break;
919
79072805 920 case OP_CONST:
11343788 921 sv = cSVOPo->op_sv;
d008e5eb
GS		 922 {
923 dTHR;
924 if (ckWARN(WARN_VOID)) {
925 useless = "a constant";
926 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
927 useless = 0;
928 else if (SvPOK(sv)) {
929 if (strnEQ(SvPVX(sv), "di", 2) ||
930 strnEQ(SvPVX(sv), "ds", 2) ||
931 strnEQ(SvPVX(sv), "ig", 2))
932 useless = 0;
933 }
8990e307
LW		 934 }
935 }
11343788 936 null(o); /* don't execute a constant */
8990e307 937 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 938 break;
939
940 case OP_POSTINC:
11343788
MB		 941 o->op_type = OP_PREINC; /* pre-increment is faster */
942 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 943 break;
944
945 case OP_POSTDEC:
11343788
MB		 946 o->op_type = OP_PREDEC; /* pre-decrement is faster */
947 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 948 break;
949
79072805
LW		 950 case OP_OR:
951 case OP_AND:
952 case OP_COND_EXPR:
11343788 953 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 954 scalarvoid(kid);
955 break;
5aabfad6 956
a0d0e21e 957 case OP_NULL:
11343788 958 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 959 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
11343788 960 if (o->op_flags & OPf_STACKED)
a0d0e21e 961 break;
5aabfad6 962 /* FALL THROUGH */
79072805
LW		 963 case OP_ENTERTRY:
964 case OP_ENTER:
965 case OP_SCALAR:
11343788 966 if (!(o->op_flags & OPf_KIDS))
79072805 967 break;
54310121 968 /* FALL THROUGH */
463ee0b2 969 case OP_SCOPE:
79072805
LW		 970 case OP_LEAVE:
971 case OP_LEAVETRY:
a0d0e21e 972 case OP_LEAVELOOP:
79072805 973 case OP_LINESEQ:
79072805 974 case OP_LIST:
11343788 975 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 976 scalarvoid(kid);
977 break;
c90c0ff4 978 case OP_ENTEREVAL:
5196be3e 979 scalarkids(o);
c90c0ff4 980 break;
5aabfad6 981 case OP_REQUIRE:
c90c0ff4 982 /* all requires must return a boolean value */
5196be3e
MB		 983 o->op_flags &= ~OPf_WANT;
984 return scalar(o);
a0d0e21e 985 case OP_SPLIT:
11343788 986 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 987 if (!kPMOP->op_pmreplroot)
988 deprecate("implicit split to @_");
989 }
990 break;
79072805 991 }
d008e5eb
GS		 992 if (useless) {
993 dTHR;
994 if (ckWARN(WARN_VOID))
995 warner(WARN_VOID, "Useless use of %s in void context", useless);
996 }
11343788 997 return o;
79072805
LW		 998}
999
1000OP *
8ac85365 1001listkids(OP *o)
79072805
LW		 1002{
1003 OP *kid;
11343788
MB		 1004 if (o && o->op_flags & OPf_KIDS) {
1005 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1006 list(kid);
1007 }
11343788 1008 return o;
79072805
LW		 1009}
1010
1011OP *
8ac85365 1012list(OP *o)
79072805
LW		 1013{
1014 OP *kid;
1015
a0d0e21e 1016 /* assumes no premature commitment */
3280af22 1017 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1018 || o->op_type == OP_RETURN)
11343788 1019 return o;
79072805 1020
5dc0d613 1021 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1022
11343788 1023 switch (o->op_type) {
79072805
LW		 1024 case OP_FLOP:
1025 case OP_REPEAT:
11343788 1026 list(cBINOPo->op_first);
79072805
LW		 1027 break;
1028 case OP_OR:
1029 case OP_AND:
1030 case OP_COND_EXPR:
11343788 1031 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1032 list(kid);
1033 break;
1034 default:
1035 case OP_MATCH:
8782bef2 1036 case OP_QR:
79072805
LW		 1037 case OP_SUBST:
1038 case OP_NULL:
11343788 1039 if (!(o->op_flags & OPf_KIDS))
79072805 1040 break;
11343788
MB		 1041 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1042 list(cBINOPo->op_first);
1043 return gen_constant_list(o);
79072805
LW		 1044 }
1045 case OP_LIST:
11343788 1046 listkids(o);
79072805
LW		 1047 break;
1048 case OP_LEAVE:
1049 case OP_LEAVETRY:
5dc0d613 1050 kid = cLISTOPo->op_first;
54310121 1051 list(kid);
1052 while (kid = kid->op_sibling) {
1053 if (kid->op_sibling)
1054 scalarvoid(kid);
1055 else
1056 list(kid);
1057 }
3280af22 1058 WITH_THR(PL_curcop = &PL_compiling);
54310121 1059 break;
748a9306 1060 case OP_SCOPE:
79072805 1061 case OP_LINESEQ:
11343788 1062 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1063 if (kid->op_sibling)
1064 scalarvoid(kid);
1065 else
1066 list(kid);
1067 }
3280af22 1068 WITH_THR(PL_curcop = &PL_compiling);
79072805 1069 break;
c90c0ff4 1070 case OP_REQUIRE:
1071 /* all requires must return a boolean value */
5196be3e
MB		 1072 o->op_flags &= ~OPf_WANT;
1073 return scalar(o);
79072805 1074 }
11343788 1075 return o;
79072805
LW		 1076}
1077
1078OP *
8ac85365 1079scalarseq(OP *o)
79072805
LW		 1080{
1081 OP *kid;
1082
11343788
MB		 1083 if (o) {
1084 if (o->op_type == OP_LINESEQ ||
1085 o->op_type == OP_SCOPE ||
1086 o->op_type == OP_LEAVE ||
1087 o->op_type == OP_LEAVETRY)
463ee0b2 1088 {
0f15f207 1089 dTHR;
11343788 1090 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1091 if (kid->op_sibling) {
463ee0b2 1092 scalarvoid(kid);
ed6116ce 1093 }
463ee0b2 1094 }
3280af22 1095 PL_curcop = &PL_compiling;
79072805 1096 }
11343788 1097 o->op_flags &= ~OPf_PARENS;
3280af22 1098 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1099 o->op_flags |= OPf_PARENS;
79072805 1100 }
8990e307 1101 else
11343788
MB		 1102 o = newOP(OP_STUB, 0);
1103 return o;
79072805
LW		 1104}
1105
76e3520e 1106STATIC OP *
8ac85365 1107modkids(OP *o, I32 type)
79072805
LW		 1108{
1109 OP *kid;
11343788
MB		 1110 if (o && o->op_flags & OPf_KIDS) {
1111 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1112 mod(kid, type);
79072805 1113 }
11343788 1114 return o;
79072805
LW		 1115}
1116
79072805 1117OP *
8ac85365 1118mod(OP *o, I32 type)
79072805 1119{
11343788 1120 dTHR;
79072805
LW		 1121 OP *kid;
1122 SV *sv;
1123
3280af22 1124 if (!o || PL_error_count)
11343788 1125 return o;
79072805 1126
11343788 1127 switch (o->op_type) {
68dc0745 1128 case OP_UNDEF:
3280af22 1129 PL_modcount++;
5dc0d613 1130 return o;
a0d0e21e 1131 case OP_CONST:
11343788 1132 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1133 goto nomod;
3280af22
NIS		 1134 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1135 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1136 PL_eval_start = 0;
a0d0e21e
LW		 1137 }
1138 else if (!type) {
3280af22
NIS		 1139 SAVEI32(PL_compiling.cop_arybase);
1140 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1141 }
1142 else if (type == OP_REFGEN)
1143 goto nomod;
1144 else
1145 croak("That use of $[ is unsupported");
1146 break;
5f05dabc 1147 case OP_STUB:
5196be3e 1148 if (o->op_flags & OPf_PARENS)
5f05dabc 1149 break;
1150 goto nomod;
a0d0e21e
LW		 1151 case OP_ENTERSUB:
1152 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1153 !(o->op_flags & OPf_STACKED)) {
1154 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1155 o->op_ppaddr = ppaddr[OP_RV2CV];
1156 assert(cUNOPo->op_first->op_type == OP_NULL);
1157 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1158 break;
1159 }
1160 /* FALL THROUGH */
1161 default:
a0d0e21e
LW		 1162 nomod:
1163 /* grep, foreach, subcalls, refgen */
1164 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1165 break;
46fc3d4c 1166 yyerror(form("Can't modify %s in %s",
638bc118
GS		 1167 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
1168 ? "do block" : op_desc[o->op_type]),
46fc3d4c 1169 type ? op_desc[type] : "local"));
11343788 1170 return o;
79072805 1171
a0d0e21e
LW		 1172 case OP_PREINC:
1173 case OP_PREDEC:
1174 case OP_POW:
1175 case OP_MULTIPLY:
1176 case OP_DIVIDE:
1177 case OP_MODULO:
1178 case OP_REPEAT:
1179 case OP_ADD:
1180 case OP_SUBTRACT:
1181 case OP_CONCAT:
1182 case OP_LEFT_SHIFT:
1183 case OP_RIGHT_SHIFT:
1184 case OP_BIT_AND:
1185 case OP_BIT_XOR:
1186 case OP_BIT_OR:
1187 case OP_I_MULTIPLY:
1188 case OP_I_DIVIDE:
1189 case OP_I_MODULO:
1190 case OP_I_ADD:
1191 case OP_I_SUBTRACT:
11343788 1192 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1193 goto nomod;
3280af22 1194 PL_modcount++;
a0d0e21e
LW		 1195 break;
1196
79072805 1197 case OP_COND_EXPR:
11343788 1198 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1199 mod(kid, type);
79072805
LW		 1200 break;
1201
1202 case OP_RV2AV:
1203 case OP_RV2HV:
93af7a87 1204 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1205 croak("Can't localize through a reference");
11343788 1206 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1207 PL_modcount = 10000;
11343788 1208 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1209 }
1210 /* FALL THROUGH */
79072805 1211 case OP_RV2GV:
5dc0d613 1212 if (scalar_mod_type(o, type))
3fe9a6f1 1213 goto nomod;
11343788 1214 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1215 /* FALL THROUGH */
1216 case OP_AASSIGN:
1217 case OP_ASLICE:
1218 case OP_HSLICE:
93a17b20
LW		 1219 case OP_NEXTSTATE:
1220 case OP_DBSTATE:
a0d0e21e
LW		 1221 case OP_REFGEN:
1222 case OP_CHOMP:
3280af22 1223 PL_modcount = 10000;
79072805 1224 break;
463ee0b2 1225 case OP_RV2SV:
11343788 1226 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1227 croak("Can't localize through a reference");
aeea060c 1228 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1229 /* FALL THROUGH */
79072805 1230 case OP_GV:
463ee0b2 1231 case OP_AV2ARYLEN:
3280af22 1232 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1233 case OP_SASSIGN:
8990e307 1234 case OP_AELEMFAST:
3280af22 1235 PL_modcount++;
8990e307
LW		 1236 break;
1237
748a9306
LW		 1238 case OP_PADAV:
1239 case OP_PADHV:
3280af22 1240 PL_modcount = 10000;
5196be3e
MB		 1241 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1242 return o; /* Treat \(@foo) like ordinary list. */
1243 if (scalar_mod_type(o, type))
3fe9a6f1 1244 goto nomod;
748a9306
LW		 1245 /* FALL THROUGH */
1246 case OP_PADSV:
3280af22 1247 PL_modcount++;
748a9306
LW		 1248 if (!type)
1249 croak("Can't localize lexical variable %s",
3280af22 1250 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), PL_na));
463ee0b2
LW		 1251 break;
1252
554b3eca 1253#ifdef USE_THREADS
2faa37cc 1254 case OP_THREADSV:
533c011a 1255 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1256 break;
1257#endif /* USE_THREADS */
1258
748a9306
LW		 1259 case OP_PUSHMARK:
1260 break;
a0d0e21e 1261
69969c6f
SB		 1262 case OP_KEYS:
1263 if (type != OP_SASSIGN)
1264 goto nomod;
5d82c453
GA		 1265 goto lvalue_func;
1266 case OP_SUBSTR:
1267 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1268 goto nomod;
5f05dabc 1269 /* FALL THROUGH */
a0d0e21e 1270 case OP_POS:
463ee0b2 1271 case OP_VEC:
5d82c453 1272 lvalue_func:
11343788
MB		 1273 pad_free(o->op_targ);
1274 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1275 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1276 if (o->op_flags & OPf_KIDS)
1277 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1278 break;
a0d0e21e 1279
463ee0b2
LW		 1280 case OP_AELEM:
1281 case OP_HELEM:
11343788 1282 ref(cBINOPo->op_first, o->op_type);
68dc0745 1283 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1284 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1285 o->op_private |= OPpLVAL_DEFER;
3280af22 1286 PL_modcount++;
463ee0b2
LW		 1287 break;
1288
1289 case OP_SCOPE:
1290 case OP_LEAVE:
1291 case OP_ENTER:
11343788
MB		 1292 if (o->op_flags & OPf_KIDS)
1293 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1294 break;
1295
1296 case OP_NULL:
638bc118
GS		 1297 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1298 goto nomod;
1299 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1300 break;
11343788
MB		 1301 if (o->op_targ != OP_LIST) {
1302 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1303 break;
1304 }
1305 /* FALL THROUGH */
463ee0b2 1306 case OP_LIST:
11343788 1307 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1308 mod(kid, type);
1309 break;
1310 }
11343788 1311 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1312
1313 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1314 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1315 else if (!type) {
11343788
MB		 1316 o->op_private |= OPpLVAL_INTRO;
1317 o->op_flags &= ~OPf_SPECIAL;
3280af22 1318 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1319 }
a0d0e21e 1320 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1321 o->op_flags |= OPf_REF;
1322 return o;
463ee0b2
LW		 1323}
1324
3fe9a6f1 1325static bool
8ac85365 1326scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1327{
1328 switch (type) {
1329 case OP_SASSIGN:
5196be3e 1330 if (o->op_type == OP_RV2GV)
3fe9a6f1 1331 return FALSE;
1332 /* FALL THROUGH */
1333 case OP_PREINC:
1334 case OP_PREDEC:
1335 case OP_POSTINC:
1336 case OP_POSTDEC:
1337 case OP_I_PREINC:
1338 case OP_I_PREDEC:
1339 case OP_I_POSTINC:
1340 case OP_I_POSTDEC:
1341 case OP_POW:
1342 case OP_MULTIPLY:
1343 case OP_DIVIDE:
1344 case OP_MODULO:
1345 case OP_REPEAT:
1346 case OP_ADD:
1347 case OP_SUBTRACT:
1348 case OP_I_MULTIPLY:
1349 case OP_I_DIVIDE:
1350 case OP_I_MODULO:
1351 case OP_I_ADD:
1352 case OP_I_SUBTRACT:
1353 case OP_LEFT_SHIFT:
1354 case OP_RIGHT_SHIFT:
1355 case OP_BIT_AND:
1356 case OP_BIT_XOR:
1357 case OP_BIT_OR:
1358 case OP_CONCAT:
1359 case OP_SUBST:
1360 case OP_TRANS:
49e9fbe6
GS		 1361 case OP_READ:
1362 case OP_SYSREAD:
1363 case OP_RECV:
3fe9a6f1 1364 case OP_ANDASSIGN: /* may work later */
1365 case OP_ORASSIGN: /* may work later */
1366 return TRUE;
1367 default:
1368 return FALSE;
1369 }
1370}
1371
463ee0b2 1372OP *
8ac85365 1373refkids(OP *o, I32 type)
463ee0b2
LW		 1374{
1375 OP *kid;
11343788
MB		 1376 if (o && o->op_flags & OPf_KIDS) {
1377 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1378 ref(kid, type);
1379 }
11343788 1380 return o;
463ee0b2
LW		 1381}
1382
1383OP *
8ac85365 1384ref(OP *o, I32 type)
463ee0b2
LW		 1385{
1386 OP *kid;
463ee0b2 1387
3280af22 1388 if (!o || PL_error_count)
11343788 1389 return o;
463ee0b2 1390
11343788 1391 switch (o->op_type) {
a0d0e21e 1392 case OP_ENTERSUB:
e55aaa0e 1393 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1394 !(o->op_flags & OPf_STACKED)) {
1395 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1396 o->op_ppaddr = ppaddr[OP_RV2CV];
1397 assert(cUNOPo->op_first->op_type == OP_NULL);
1398 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1399 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1400 }
1401 break;
aeea060c 1402
463ee0b2 1403 case OP_COND_EXPR:
11343788 1404 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1405 ref(kid, type);
1406 break;
8990e307 1407 case OP_RV2SV:
11343788 1408 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1409 /* FALL THROUGH */
1410 case OP_PADSV:
5f05dabc 1411 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1412 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1413 : type == OP_RV2HV ? OPpDEREF_HV
1414 : OPpDEREF_SV);
11343788 1415 o->op_flags |= OPf_MOD;
a0d0e21e 1416 }
8990e307
LW		 1417 break;
1418
2faa37cc 1419 case OP_THREADSV:
a863c7d1
MB		 1420 o->op_flags |= OPf_MOD; /* XXX ??? */
1421 break;
1422
463ee0b2
LW		 1423 case OP_RV2AV:
1424 case OP_RV2HV:
aeea060c 1425 o->op_flags |= OPf_REF;
8990e307 1426 /* FALL THROUGH */
463ee0b2 1427 case OP_RV2GV:
11343788 1428 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1429 break;
8990e307 1430
463ee0b2
LW		 1431 case OP_PADAV:
1432 case OP_PADHV:
aeea060c 1433 o->op_flags |= OPf_REF;
79072805 1434 break;
aeea060c 1435
8990e307 1436 case OP_SCALAR:
79072805 1437 case OP_NULL:
11343788 1438 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1439 break;
11343788 1440 ref(cBINOPo->op_first, type);
79072805
LW		 1441 break;
1442 case OP_AELEM:
1443 case OP_HELEM:
11343788 1444 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1445 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1446 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1447 : type == OP_RV2HV ? OPpDEREF_HV
1448 : OPpDEREF_SV);
11343788 1449 o->op_flags |= OPf_MOD;
8990e307 1450 }
79072805
LW		 1451 break;
1452
463ee0b2 1453 case OP_SCOPE:
79072805
LW		 1454 case OP_LEAVE:
1455 case OP_ENTER:
8990e307 1456 case OP_LIST:
11343788 1457 if (!(o->op_flags & OPf_KIDS))
79072805 1458 break;
11343788 1459 ref(cLISTOPo->op_last, type);
79072805 1460 break;
a0d0e21e
LW		 1461 default:
1462 break;
79072805 1463 }
11343788 1464 return scalar(o);
8990e307 1465
79072805
LW		 1466}
1467
1468OP *
8ac85365 1469my(OP *o)
93a17b20
LW		 1470{
1471 OP *kid;
93a17b20
LW		 1472 I32 type;
1473
3280af22 1474 if (!o || PL_error_count)
11343788 1475 return o;
93a17b20 1476
11343788 1477 type = o->op_type;
93a17b20 1478 if (type == OP_LIST) {
11343788 1479 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1480 my(kid);
dab48698 1481 } else if (type == OP_UNDEF) {
7766148a 1482 return o;
dab48698 1483 } else if (type != OP_PADSV &&
93a17b20
LW		 1484 type != OP_PADAV &&
1485 type != OP_PADHV &&
1486 type != OP_PUSHMARK)
1487 {
5dc0d613 1488 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1489 return o;
93a17b20 1490 }
11343788
MB		 1491 o->op_flags |= OPf_MOD;
1492 o->op_private |= OPpLVAL_INTRO;
1493 return o;
93a17b20
LW		 1494}
1495
1496OP *
8ac85365 1497sawparens(OP *o)
79072805
LW		 1498{
1499 if (o)
1500 o->op_flags |= OPf_PARENS;
1501 return o;
1502}
1503
1504OP *
8ac85365 1505bind_match(I32 type, OP *left, OP *right)
79072805 1506{
d008e5eb 1507 dTHR;
11343788 1508 OP *o;
79072805 1509
599cee73
PM		 1510 if (ckWARN(WARN_UNSAFE) &&
1511 (left->op_type == OP_RV2AV ||
1512 left->op_type == OP_RV2HV ||
1513 left->op_type == OP_PADAV ||
1514 left->op_type == OP_PADHV)) {
1515 char *desc = op_desc[(right->op_type == OP_SUBST ||
1516 right->op_type == OP_TRANS)
1517 ? right->op_type : OP_MATCH];
1518 char *sample = ((left->op_type == OP_RV2AV ||
1519 left->op_type == OP_PADAV)
1520 ? "@array" : "%hash");
1521 warner(WARN_UNSAFE,
1522 "Applying %s to %s will act on scalar(%s)",
1523 desc, sample, sample);
2ae324a7 1524 }
1525
79072805
LW		 1526 if (right->op_type == OP_MATCH ||
1527 right->op_type == OP_SUBST ||
1528 right->op_type == OP_TRANS) {
1529 right->op_flags |= OPf_STACKED;
1530 if (right->op_type != OP_MATCH)
463ee0b2 1531 left = mod(left, right->op_type);
79072805 1532 if (right->op_type == OP_TRANS)
11343788 1533 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1534 else
11343788 1535 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1536 if (type == OP_NOT)
11343788
MB		 1537 return newUNOP(OP_NOT, 0, scalar(o));
1538 return o;
79072805
LW		 1539 }
1540 else
1541 return bind_match(type, left,
1542 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1543}
1544
1545OP *
8ac85365 1546invert(OP *o)
79072805 1547{
11343788
MB		 1548 if (!o)
1549 return o;
79072805 1550 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1551 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1552}
1553
1554OP *
8ac85365 1555scope(OP *o)
79072805
LW		 1556{
1557 if (o) {
3280af22 1558 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1559 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1560 o->op_type = OP_LEAVE;
1561 o->op_ppaddr = ppaddr[OP_LEAVE];
1562 }
1563 else {
1564 if (o->op_type == OP_LINESEQ) {
1565 OP *kid;
1566 o->op_type = OP_SCOPE;
1567 o->op_ppaddr = ppaddr[OP_SCOPE];
1568 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1569 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1570 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1571 null(kid);
748a9306 1572 }
463ee0b2
LW		 1573 }
1574 else
748a9306 1575 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1576 }
79072805
LW		 1577 }
1578 return o;
1579}
1580
b3ac6de7
IZ		 1581void
1582save_hints(void)
1583{
3280af22
NIS		 1584 SAVEI32(PL_hints);
1585 SAVESPTR(GvHV(PL_hintgv));
1586 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1587 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1588}
1589
a0d0e21e 1590int
8ac85365 1591block_start(int full)
79072805 1592{
11343788 1593 dTHR;
3280af22 1594 int retval = PL_savestack_ix;
b3ac6de7 1595
3280af22 1596 SAVEI32(PL_comppad_name_floor);
55497cff 1597 if (full) {
3280af22
NIS		 1598 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1599 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1600 else
3280af22
NIS		 1601 PL_comppad_name_floor = 0;
1602 }
1603 SAVEI32(PL_min_intro_pending);
1604 SAVEI32(PL_max_intro_pending);
1605 PL_min_intro_pending = 0;
1606 SAVEI32(PL_comppad_name_fill);
1607 SAVEI32(PL_padix_floor);
1608 PL_padix_floor = PL_padix;
1609 PL_pad_reset_pending = FALSE;
b3ac6de7 1610 SAVEHINTS();
3280af22 1611 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1612 SAVEPPTR(PL_compiling.cop_warnings);
599cee73
PM		 1613 if (PL_compiling.cop_warnings != WARN_ALL &&
1614 PL_compiling.cop_warnings != WARN_NONE) {
1615 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1616 SAVEFREESV(PL_compiling.cop_warnings) ;
1617 }
1618
1619
a0d0e21e
LW		 1620 return retval;
1621}
1622
1623OP*
8ac85365 1624block_end(I32 floor, OP *seq)
a0d0e21e 1625{
11343788 1626 dTHR;
3280af22 1627 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1628 OP* retval = scalarseq(seq);
a0d0e21e 1629 LEAVE_SCOPE(floor);
3280af22 1630 PL_pad_reset_pending = FALSE;
e24b16f9 1631 PL_compiling.op_private = PL_hints;
a0d0e21e 1632 if (needblockscope)
3280af22
NIS		 1633 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1634 pad_leavemy(PL_comppad_name_fill);
1635 PL_cop_seqmax++;
a0d0e21e
LW		 1636 return retval;
1637}
1638
76e3520e 1639STATIC OP *
54b9620d
MB		 1640newDEFSVOP(void)
1641{
1642#ifdef USE_THREADS
1643 OP *o = newOP(OP_THREADSV, 0);
1644 o->op_targ = find_threadsv("_");
1645 return o;
1646#else
3280af22 1647 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1648#endif /* USE_THREADS */
1649}
1650
a0d0e21e 1651void
8ac85365 1652newPROG(OP *o)
a0d0e21e 1653{
11343788 1654 dTHR;
3280af22
NIS		 1655 if (PL_in_eval) {
1656 PL_eval_root = newUNOP(OP_LEAVEEVAL, ((PL_in_eval & 4) ? OPf_SPECIAL : 0), o);
1657 PL_eval_start = linklist(PL_eval_root);
1658 PL_eval_root->op_next = 0;
1659 peep(PL_eval_start);
a0d0e21e
LW		 1660 }
1661 else {
5dc0d613 1662 if (!o)
a0d0e21e 1663 return;
3280af22
NIS		 1664 PL_main_root = scope(sawparens(scalarvoid(o)));
1665 PL_curcop = &PL_compiling;
1666 PL_main_start = LINKLIST(PL_main_root);
1667 PL_main_root->op_next = 0;
1668 peep(PL_main_start);
1669 PL_compcv = 0;
3841441e 1670
4fdae800 1671 /* Register with debugger */
84902520 1672 if (PERLDB_INTER) {
3841441e 1673 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1674 if (cv) {
1675 dSP;
924508f0 1676 PUSHMARK(SP);
3280af22 1677 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e
CS		 1678 PUTBACK;
1679 perl_call_sv((SV*)cv, G_DISCARD);
1680 }
1681 }
79072805 1682 }
79072805
LW		 1683}
1684
1685OP *
8ac85365 1686localize(OP *o, I32 lex)
79072805
LW		 1687{
1688 if (o->op_flags & OPf_PARENS)
1689 list(o);
8990e307 1690 else {
d008e5eb 1691 dTHR;
599cee73 1692 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1693 char *s;
834a4ddd 1694 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1695 if (*s == ';' || *s == '=')
599cee73
PM		 1696 warner(WARN_PARENTHESIS, "Parens missing around \"%s\" list",
1697 lex ? "my" : "local");
8990e307
LW		 1698 }
1699 }
3280af22
NIS		 1700 PL_in_my = FALSE;
1701 PL_in_my_stash = Nullhv;
93a17b20
LW		 1702 if (lex)
1703 return my(o);
1704 else
463ee0b2 1705 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1706}
1707
1708OP *
8ac85365 1709jmaybe(OP *o)
79072805
LW		 1710{
1711 if (o->op_type == OP_LIST) {
554b3eca
MB		 1712 OP *o2;
1713#ifdef USE_THREADS
2faa37cc 1714 o2 = newOP(OP_THREADSV, 0);
54b9620d 1715 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1716#else
1717 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1718#endif /* USE_THREADS */
1719 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1720 }
1721 return o;
1722}
1723
1724OP *
8ac85365 1725fold_constants(register OP *o)
79072805 1726{
11343788 1727 dTHR;
79072805
LW		 1728 register OP *curop;
1729 I32 type = o->op_type;
748a9306 1730 SV *sv;
79072805
LW		 1731
1732 if (opargs[type] & OA_RETSCALAR)
1733 scalar(o);
1734 if (opargs[type] & OA_TARGET)
ed6116ce 1735 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1736
3280af22 1737 if ((opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER))
a0d0e21e 1738 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1739
79072805
LW		 1740 if (!(opargs[type] & OA_FOLDCONST))
1741 goto nope;
1742
de939608
CS		 1743 switch (type) {
1744 case OP_SPRINTF:
1745 case OP_UCFIRST:
1746 case OP_LCFIRST:
1747 case OP_UC:
1748 case OP_LC:
69dcf70c
MB		 1749 case OP_SLT:
1750 case OP_SGT:
1751 case OP_SLE:
1752 case OP_SGE:
1753 case OP_SCMP:
1754
de939608
CS		 1755 if (o->op_private & OPpLOCALE)
1756 goto nope;
1757 }
1758
3280af22 1759 if (PL_error_count)
a0d0e21e
LW		 1760 goto nope; /* Don't try to run w/ errors */
1761
79072805 1762 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1763 if (curop->op_type != OP_CONST &&
1764 curop->op_type != OP_LIST &&
1765 curop->op_type != OP_SCALAR &&
a0d0e21e 1766 curop->op_type != OP_NULL &&
93a17b20 1767 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1768 goto nope;
1769 }
1770 }
1771
1772 curop = LINKLIST(o);
1773 o->op_next = 0;
533c011a 1774 PL_op = curop;
76e3520e 1775 CALLRUNOPS();
3280af22 1776 sv = *(PL_stack_sp--);
748a9306 1777 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1778 pad_swipe(o->op_targ);
748a9306
LW		 1779 else if (SvTEMP(sv)) { /* grab mortal temp? */
1780 (void)SvREFCNT_inc(sv);
1781 SvTEMP_off(sv);
85e6fe83 1782 }
79072805
LW		 1783 op_free(o);
1784 if (type == OP_RV2GV)
b1cb66bf 1785 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1786 else {
ee580363
GS		 1787 /* try to smush double to int, but don't smush -2.0 to -2 */
1788 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1789 type != OP_NEGATE)
1790 {
748a9306 1791 IV iv = SvIV(sv);
ee580363 1792 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1793 SvREFCNT_dec(sv);
1794 sv = newSViv(iv);
1795 }
b1cb66bf 1796 else
1797 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1798 }
1799 return newSVOP(OP_CONST, 0, sv);
1800 }
aeea060c 1801
79072805
LW		 1802 nope:
1803 if (!(opargs[type] & OA_OTHERINT))
1804 return o;
79072805 1805
3280af22 1806 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1807 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1808 return o;
1809
1810 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1811 if (curop->op_type == OP_CONST) {
b1cb66bf 1812 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1813 continue;
1814 return o;
1815 }
1816 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1817 continue;
1818 return o;
1819 }
a0d0e21e 1820 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1821 }
1822
79072805
LW		 1823 return o;
1824}
1825
1826OP *
8ac85365 1827gen_constant_list(register OP *o)
79072805 1828{
11343788 1829 dTHR;
79072805 1830 register OP *curop;
3280af22 1831 I32 oldtmps_floor = PL_tmps_floor;
79072805 1832
a0d0e21e 1833 list(o);
3280af22 1834 if (PL_error_count)
a0d0e21e
LW		 1835 return o; /* Don't attempt to run with errors */
1836
533c011a 1837 PL_op = curop = LINKLIST(o);
a0d0e21e 1838 o->op_next = 0;
11343788 1839 pp_pushmark(ARGS);
76e3520e 1840 CALLRUNOPS();
533c011a 1841 PL_op = curop;
11343788 1842 pp_anonlist(ARGS);
3280af22 1843 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1844
1845 o->op_type = OP_RV2AV;
1846 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1847 curop = ((UNOP*)o)->op_first;
3280af22 1848 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1849 op_free(curop);
79072805
LW		 1850 linklist(o);
1851 return list(o);
1852}
1853
1854OP *
8ac85365 1855convert(I32 type, I32 flags, OP *o)
79072805
LW		 1856{
1857 OP *kid;
a0d0e21e 1858 OP *last = 0;
79072805 1859
11343788
MB		 1860 if (!o || o->op_type != OP_LIST)
1861 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1862 else
5dc0d613 1863 o->op_flags &= ~OPf_WANT;
79072805 1864
8990e307 1865 if (!(opargs[type] & OA_MARK))
11343788 1866 null(cLISTOPo->op_first);
8990e307 1867
11343788
MB		 1868 o->op_type = type;
1869 o->op_ppaddr = ppaddr[type];
1870 o->op_flags |= flags;
79072805 1871
11343788
MB		 1872 o = CHECKOP(type, o);
1873 if (o->op_type != type)
1874 return o;
79072805 1875
11343788 1876 if (cLISTOPo->op_children < 7) {
79072805 1877 /* XXX do we really need to do this if we're done appending?? */
11343788 1878 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1879 last = kid;
11343788 1880 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1881 }
1882
11343788 1883 return fold_constants(o);
79072805
LW		 1884}
1885
1886/* List constructors */
1887
1888OP *
8ac85365 1889append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1890{
1891 if (!first)
1892 return last;
8990e307
LW		 1893
1894 if (!last)
79072805 1895 return first;
8990e307 1896
a0d0e21e
LW		 1897 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1898 return newLISTOP(type, 0, first, last);
79072805 1899
a0d0e21e
LW		 1900 if (first->op_flags & OPf_KIDS)
1901 ((LISTOP*)first)->op_last->op_sibling = last;
1902 else {
1903 first->op_flags |= OPf_KIDS;
1904 ((LISTOP*)first)->op_first = last;
1905 }
1906 ((LISTOP*)first)->op_last = last;
1907 ((LISTOP*)first)->op_children++;
1908 return first;
79072805
LW		 1909}
1910
1911OP *
8ac85365 1912append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1913{
1914 if (!first)
1915 return (OP*)last;
8990e307
LW		 1916
1917 if (!last)
79072805 1918 return (OP*)first;
8990e307
LW		 1919
1920 if (first->op_type != type)
79072805 1921 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1922
1923 if (last->op_type != type)
79072805
LW		 1924 return append_elem(type, (OP*)first, (OP*)last);
1925
1926 first->op_last->op_sibling = last->op_first;
1927 first->op_last = last->op_last;
1928 first->op_children += last->op_children;
1929 if (first->op_children)
acb74605 1930 first->op_flags |= OPf_KIDS;
79072805
LW		 1931
1932 Safefree(last);
1933 return (OP*)first;
1934}
1935
1936OP *
8ac85365 1937prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1938{
1939 if (!first)
1940 return last;
8990e307
LW		 1941
1942 if (!last)
79072805 1943 return first;
8990e307
LW		 1944
1945 if (last->op_type == type) {
1946 if (type == OP_LIST) { /* already a PUSHMARK there */
1947 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1948 ((LISTOP*)last)->op_first->op_sibling = first;
1949 }
1950 else {
1951 if (!(last->op_flags & OPf_KIDS)) {
1952 ((LISTOP*)last)->op_last = first;
1953 last->op_flags |= OPf_KIDS;
1954 }
1955 first->op_sibling = ((LISTOP*)last)->op_first;
1956 ((LISTOP*)last)->op_first = first;
79072805 1957 }
79072805
LW		 1958 ((LISTOP*)last)->op_children++;
1959 return last;
1960 }
1961
1962 return newLISTOP(type, 0, first, last);
1963}
1964
1965/* Constructors */
1966
1967OP *
8ac85365 1968newNULLLIST(void)
79072805 1969{
8990e307
LW		 1970 return newOP(OP_STUB, 0);
1971}
1972
1973OP *
8ac85365 1974force_list(OP *o)
8990e307 1975{
11343788
MB		 1976 if (!o || o->op_type != OP_LIST)
1977 o = newLISTOP(OP_LIST, 0, o, Nullop);
1978 null(o);
1979 return o;
79072805
LW		 1980}
1981
1982OP *
8ac85365 1983newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1984{
1985 LISTOP *listop;
1986
1987 Newz(1101, listop, 1, LISTOP);
1988
1989 listop->op_type = type;
1990 listop->op_ppaddr = ppaddr[type];
1991 listop->op_children = (first != 0) + (last != 0);
1992 listop->op_flags = flags;
79072805
LW		 1993
1994 if (!last && first)
1995 last = first;
1996 else if (!first && last)
1997 first = last;
8990e307
LW		 1998 else if (first)
1999 first->op_sibling = last;
79072805
LW		 2000 listop->op_first = first;
2001 listop->op_last = last;
8990e307
LW		 2002 if (type == OP_LIST) {
2003 OP* pushop;
2004 pushop = newOP(OP_PUSHMARK, 0);
2005 pushop->op_sibling = first;
2006 listop->op_first = pushop;
2007 listop->op_flags |= OPf_KIDS;
2008 if (!last)
2009 listop->op_last = pushop;
2010 }
2011 else if (listop->op_children)
2012 listop->op_flags |= OPf_KIDS;
79072805
LW		 2013
2014 return (OP*)listop;
2015}
2016
2017OP *
8ac85365 2018newOP(I32 type, I32 flags)
79072805 2019{
11343788
MB		 2020 OP *o;
2021 Newz(1101, o, 1, OP);
2022 o->op_type = type;
2023 o->op_ppaddr = ppaddr[type];
2024 o->op_flags = flags;
79072805 2025
11343788
MB		 2026 o->op_next = o;
2027 o->op_private = 0 + (flags >> 8);
79072805 2028 if (opargs[type] & OA_RETSCALAR)
11343788 2029 scalar(o);
79072805 2030 if (opargs[type] & OA_TARGET)
11343788
MB		 2031 o->op_targ = pad_alloc(type, SVs_PADTMP);
2032 return CHECKOP(type, o);
79072805
LW		 2033}
2034
2035OP *
8ac85365 2036newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 2037{
2038 UNOP *unop;
2039
93a17b20 2040 if (!first)
aeea060c 2041 first = newOP(OP_STUB, 0);
8990e307
LW		 2042 if (opargs[type] & OA_MARK)
2043 first = force_list(first);
93a17b20 2044
79072805
LW		 2045 Newz(1101, unop, 1, UNOP);
2046 unop->op_type = type;
2047 unop->op_ppaddr = ppaddr[type];
2048 unop->op_first = first;
2049 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2050 unop->op_private = 1 | (flags >> 8);
e50aee73 2051 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2052 if (unop->op_next)
2053 return (OP*)unop;
2054
a0d0e21e 2055 return fold_constants((OP *) unop);
79072805
LW		 2056}
2057
2058OP *
8ac85365 2059newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2060{
2061 BINOP *binop;
2062 Newz(1101, binop, 1, BINOP);
2063
2064 if (!first)
2065 first = newOP(OP_NULL, 0);
2066
2067 binop->op_type = type;
2068 binop->op_ppaddr = ppaddr[type];
2069 binop->op_first = first;
2070 binop->op_flags = flags | OPf_KIDS;
2071 if (!last) {
2072 last = first;
c07a80fd 2073 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2074 }
2075 else {
c07a80fd 2076 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2077 first->op_sibling = last;
2078 }
2079
e50aee73 2080 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2081 if (binop->op_next)
2082 return (OP*)binop;
2083
7284ab6f 2084 binop->op_last = binop->op_first->op_sibling;
79072805 2085
a0d0e21e 2086 return fold_constants((OP *)binop);
79072805
LW		 2087}
2088
a0ed51b3
LW		 2089static int
2090utf8compare(const void *a, const void *b)
2091{
2092 int i;
2093 for (i = 0; i < 10; i++) {
2094 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2095 return -1;
2096 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2097 return 1;
2098 }
2099 return 0;
2100}
2101
79072805 2102OP *
8ac85365 2103pmtrans(OP *o, OP *expr, OP *repl)
79072805 2104{
79072805
LW		 2105 SV *tstr = ((SVOP*)expr)->op_sv;
2106 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2107 STRLEN tlen;
2108 STRLEN rlen;
ec49126f 2109 register U8 *t = (U8*)SvPV(tstr, tlen);
2110 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2111 register I32 i;
2112 register I32 j;
a0ed51b3 2113 I32 del;
79072805 2114 I32 complement;
5d06d08e 2115 I32 squash;
79072805
LW		 2116 register short *tbl;
2117
11343788 2118 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2119 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2120 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2121
a0ed51b3
LW		 2122 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
2123 SV* listsv = newSVpv("# comment\n",0);
2124 SV* transv = 0;
2125 U8* tend = t + tlen;
2126 U8* rend = r + rlen;
2127 I32 ulen;
2128 U32 tfirst = 1;
2129 U32 tlast = 0;
2130 I32 tdiff;
2131 U32 rfirst = 1;
2132 U32 rlast = 0;
2133 I32 rdiff;
2134 I32 diff;
2135 I32 none = 0;
2136 U32 max = 0;
2137 I32 bits;
2138 I32 grows = 0;
2139 I32 havefinal = 0;
2140 U32 final;
2141 HV *hv;
2142 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2143 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2144
2145 if (complement) {
2146 U8 tmpbuf[10];
2147 U8** cp;
2148 UV nextmin = 0;
2149 New(1109, cp, tlen, U8*);
2150 i = 0;
2151 transv = newSVpv("",0);
2152 while (t < tend) {
2153 cp[i++] = t;
2154 t += UTF8SKIP(t);
2155 if (*t == 0xff) {
2156 t++;
2157 t += UTF8SKIP(t);
2158 }
2159 }
2160 qsort(cp, i, sizeof(U8*), utf8compare);
2161 for (j = 0; j < i; j++) {
2162 U8 *s = cp[j];
2163 UV val = utf8_to_uv(s, &ulen);
2164 s += ulen;
2165 diff = val - nextmin;
2166 if (diff > 0) {
2167 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2168 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2169 if (diff > 1) {
2170 t = uv_to_utf8(tmpbuf, val - 1);
2171 sv_catpvn(transv, "\377", 1);
dfe13c55 2172 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2173 }
2174 }
2175 if (*s == 0xff)
2176 val = utf8_to_uv(s+1, &ulen);
2177 if (val >= nextmin)
2178 nextmin = val + 1;
2179 }
2180 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2181 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2182 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2183 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2184 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2185 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2186 tlen = SvCUR(transv);
2187 tend = t + tlen;
2188 }
2189 else if (!rlen && !del) {
2190 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2191 }
2192 if (!squash) {
2193 if (to_utf && from_utf) { /* only counting characters */
2194 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2195 o->op_private |= OPpTRANS_IDENTICAL;
2196 }
2197 else { /* straight latin-1 translation */
2198 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2199 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2200 o->op_private |= OPpTRANS_IDENTICAL;
2201 }
a0ed51b3
LW		 2202 }
2203
2204 while (t < tend || tfirst <= tlast) {
2205 /* see if we need more "t" chars */
2206 if (tfirst > tlast) {
2207 tfirst = (I32)utf8_to_uv(t, &ulen);
2208 t += ulen;
2209 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2210 tlast = (I32)utf8_to_uv(++t, &ulen);
2211 t += ulen;
2212 }
2213 else
2214 tlast = tfirst;
2215 }
2216
2217 /* now see if we need more "r" chars */
2218 if (rfirst > rlast) {
2219 if (r < rend) {
2220 rfirst = (I32)utf8_to_uv(r, &ulen);
2221 r += ulen;
2222 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2223 rlast = (I32)utf8_to_uv(++r, &ulen);
2224 r += ulen;
2225 }
2226 else
2227 rlast = rfirst;
2228 }
2229 else {
2230 if (!havefinal++)
2231 final = rlast;
2232 rfirst = rlast = 0xffffffff;
2233 }
2234 }
2235
2236 /* now see which range will peter our first, if either. */
2237 tdiff = tlast - tfirst;
2238 rdiff = rlast - rfirst;
2239
2240 if (tdiff <= rdiff)
2241 diff = tdiff;
2242 else
2243 diff = rdiff;
2244
2245 if (rfirst == 0xffffffff) {
2246 diff = tdiff; /* oops, pretend rdiff is infinite */
2247 if (diff > 0)
2248 sv_catpvf(listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
2249 else
2250 sv_catpvf(listsv, "%04x\t\tXXXX\n", tfirst);
2251 }
2252 else {
2253 if (diff > 0)
2254 sv_catpvf(listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
2255 else
2256 sv_catpvf(listsv, "%04x\t\t%04x\n", tfirst, rfirst);
2257
2258 if (rfirst + diff > max)
2259 max = rfirst + diff;
2260 rfirst += diff + 1;
2261 if (!grows) {
2262 if (rfirst <= 0x80)
2263 ;
2264 else if (rfirst <= 0x800)
2265 grows |= (tfirst < 0x80);
2266 else if (rfirst <= 0x10000)
2267 grows |= (tfirst < 0x800);
2268 else if (rfirst <= 0x200000)
2269 grows |= (tfirst < 0x10000);
2270 else if (rfirst <= 0x4000000)
2271 grows |= (tfirst < 0x200000);
2272 else if (rfirst <= 0x80000000)
2273 grows |= (tfirst < 0x4000000);
2274 }
2275 }
2276 tfirst += diff + 1;
2277 }
2278
2279 none = ++max;
2280 if (del)
2281 del = ++max;
2282
2283 if (max > 0xffff)
2284 bits = 32;
2285 else if (max > 0xff)
2286 bits = 16;
2287 else
2288 bits = 8;
2289
2290 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2291 SvREFCNT_dec(listsv);
2292 if (transv)
2293 SvREFCNT_dec(transv);
2294
2295 if (!del && havefinal)
2296 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2297
2298 if (grows && to_utf)
2299 o->op_private |= OPpTRANS_GROWS;
2300
2301 op_free(expr);
2302 op_free(repl);
2303 return o;
2304 }
2305
2306 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2307 if (complement) {
2308 Zero(tbl, 256, short);
2309 for (i = 0; i < tlen; i++)
ec49126f 2310 tbl[t[i]] = -1;
79072805
LW		 2311 for (i = 0, j = 0; i < 256; i++) {
2312 if (!tbl[i]) {
2313 if (j >= rlen) {
a0ed51b3 2314 if (del)
79072805
LW		 2315 tbl[i] = -2;
2316 else if (rlen)
ec49126f 2317 tbl[i] = r[j-1];
79072805
LW		 2318 else
2319 tbl[i] = i;
2320 }
2321 else
ec49126f 2322 tbl[i] = r[j++];
79072805
LW		 2323 }
2324 }
2325 }
2326 else {
a0ed51b3 2327 if (!rlen && !del) {
79072805 2328 r = t; rlen = tlen;
5d06d08e 2329 if (!squash)
4757a243 2330 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2331 }
2332 for (i = 0; i < 256; i++)
2333 tbl[i] = -1;
2334 for (i = 0, j = 0; i < tlen; i++,j++) {
2335 if (j >= rlen) {
a0ed51b3 2336 if (del) {
ec49126f 2337 if (tbl[t[i]] == -1)
2338 tbl[t[i]] = -2;
79072805
LW		 2339 continue;
2340 }
2341 --j;
2342 }
ec49126f 2343 if (tbl[t[i]] == -1)
2344 tbl[t[i]] = r[j];
79072805
LW		 2345 }
2346 }
2347 op_free(expr);
2348 op_free(repl);
2349
11343788 2350 return o;
79072805
LW		 2351}
2352
2353OP *
8ac85365 2354newPMOP(I32 type, I32 flags)
79072805 2355{
11343788 2356 dTHR;
79072805
LW		 2357 PMOP *pmop;
2358
2359 Newz(1101, pmop, 1, PMOP);
2360 pmop->op_type = type;
2361 pmop->op_ppaddr = ppaddr[type];
2362 pmop->op_flags = flags;
c07a80fd 2363 pmop->op_private = 0 | (flags >> 8);
79072805 2364
3280af22 2365 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2366 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2367 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2368 pmop->op_pmpermflags |= PMf_LOCALE;
2369 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2370
79072805 2371 /* link into pm list */
3280af22
NIS		 2372 if (type != OP_TRANS && PL_curstash) {
2373 pmop->op_pmnext = HvPMROOT(PL_curstash);
2374 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2375 }
2376
2377 return (OP*)pmop;
2378}
2379
2380OP *
8ac85365 2381pmruntime(OP *o, OP *expr, OP *repl)
79072805 2382{
5c0ca799 2383 dTHR;
79072805
LW		 2384 PMOP *pm;
2385 LOGOP *rcop;
ce862d02 2386 I32 repl_has_vars = 0;
79072805 2387
11343788
MB		 2388 if (o->op_type == OP_TRANS)
2389 return pmtrans(o, expr, repl);
79072805 2390
3280af22 2391 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2392 pm = (PMOP*)o;
79072805
LW		 2393
2394 if (expr->op_type == OP_CONST) {
463ee0b2 2395 STRLEN plen;
79072805 2396 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2397 char *p = SvPV(pat, plen);
11343788 2398 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2399 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2400 p = SvPV(pat, plen);
79072805
LW		 2401 pm->op_pmflags |= PMf_SKIPWHITE;
2402 }
15e52e56 2403 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2404 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2405 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2406 op_free(expr);
2407 }
2408 else {
3280af22
NIS		 2409 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2410 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2411 ? OP_REGCRESET
2412 : OP_REGCMAYBE),0,expr);
463ee0b2 2413
79072805
LW		 2414 Newz(1101, rcop, 1, LOGOP);
2415 rcop->op_type = OP_REGCOMP;
2416 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2417 rcop->op_first = scalar(expr);
3280af22 2418 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2419 ? (OPf_SPECIAL | OPf_KIDS)
2420 : OPf_KIDS);
79072805 2421 rcop->op_private = 1;
11343788 2422 rcop->op_other = o;
79072805
LW		 2423
2424 /* establish postfix order */
3280af22 2425 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2426 LINKLIST(expr);
2427 rcop->op_next = expr;
2428 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2429 }
2430 else {
2431 rcop->op_next = LINKLIST(expr);
2432 expr->op_next = (OP*)rcop;
2433 }
79072805 2434
11343788 2435 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2436 }
2437
2438 if (repl) {
748a9306
LW		 2439 OP *curop;
2440 if (pm->op_pmflags & PMf_EVAL)
2441 curop = 0;
554b3eca 2442#ifdef USE_THREADS
2faa37cc 2443 else if (repl->op_type == OP_THREADSV
554b3eca 2444 && strchr("&`'123456789+",
533c011a 2445 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2446 {
2447 curop = 0;
2448 }
2449#endif /* USE_THREADS */
748a9306
LW		 2450 else if (repl->op_type == OP_CONST)
2451 curop = repl;
79072805 2452 else {
79072805
LW		 2453 OP *lastop = 0;
2454 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2455 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2456#ifdef USE_THREADS
ce862d02
IZ		 2457 if (curop->op_type == OP_THREADSV) {
2458 repl_has_vars = 1;
be949f6f 2459 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2460 break;
554b3eca
MB		 2461 }
2462#else
79072805
LW		 2463 if (curop->op_type == OP_GV) {
2464 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2465 repl_has_vars = 1;
93a17b20 2466 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2467 break;
2468 }
554b3eca 2469#endif /* USE_THREADS */
79072805
LW		 2470 else if (curop->op_type == OP_RV2CV)
2471 break;
2472 else if (curop->op_type == OP_RV2SV ||
2473 curop->op_type == OP_RV2AV ||
2474 curop->op_type == OP_RV2HV ||
2475 curop->op_type == OP_RV2GV) {
2476 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2477 break;
2478 }
748a9306
LW		 2479 else if (curop->op_type == OP_PADSV ||
2480 curop->op_type == OP_PADAV ||
2481 curop->op_type == OP_PADHV ||
554b3eca 2482 curop->op_type == OP_PADANY) {
ce862d02 2483 repl_has_vars = 1;
748a9306 2484 }
1167e5da
SM		 2485 else if (curop->op_type == OP_PUSHRE)
2486 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2487 else
2488 break;
2489 }
2490 lastop = curop;
2491 }
748a9306 2492 }
ce862d02
IZ		 2493 if (curop == repl
2494 && !(repl_has_vars
2495 && (!pm->op_pmregexp
2496 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2497 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2498 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2499 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2500 }
2501 else {
ce862d02
IZ		 2502 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2503 pm->op_pmflags |= PMf_MAYBE_CONST;
2504 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2505 }
748a9306
LW		 2506 Newz(1101, rcop, 1, LOGOP);
2507 rcop->op_type = OP_SUBSTCONT;
2508 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2509 rcop->op_first = scalar(repl);
2510 rcop->op_flags |= OPf_KIDS;
2511 rcop->op_private = 1;
11343788 2512 rcop->op_other = o;
748a9306
LW		 2513
2514 /* establish postfix order */
2515 rcop->op_next = LINKLIST(repl);
2516 repl->op_next = (OP*)rcop;
2517
2518 pm->op_pmreplroot = scalar((OP*)rcop);
2519 pm->op_pmreplstart = LINKLIST(rcop);
2520 rcop->op_next = 0;
79072805
LW		 2521 }
2522 }
2523
2524 return (OP*)pm;
2525}
2526
2527OP *
8ac85365 2528newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2529{
2530 SVOP *svop;
2531 Newz(1101, svop, 1, SVOP);
2532 svop->op_type = type;
2533 svop->op_ppaddr = ppaddr[type];
2534 svop->op_sv = sv;
2535 svop->op_next = (OP*)svop;
2536 svop->op_flags = flags;
2537 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2538 scalar((OP*)svop);
79072805 2539 if (opargs[type] & OA_TARGET)
ed6116ce 2540 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2541 return CHECKOP(type, svop);
79072805
LW		 2542}
2543
2544OP *
8ac85365 2545newGVOP(I32 type, I32 flags, GV *gv)
79072805 2546{
11343788 2547 dTHR;
79072805
LW		 2548 GVOP *gvop;
2549 Newz(1101, gvop, 1, GVOP);
2550 gvop->op_type = type;
2551 gvop->op_ppaddr = ppaddr[type];
8990e307 2552 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2553 gvop->op_next = (OP*)gvop;
2554 gvop->op_flags = flags;
2555 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2556 scalar((OP*)gvop);
79072805 2557 if (opargs[type] & OA_TARGET)
ed6116ce 2558 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2559 return CHECKOP(type, gvop);
79072805
LW		 2560}
2561
2562OP *
8ac85365 2563newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2564{
2565 PVOP *pvop;
2566 Newz(1101, pvop, 1, PVOP);
2567 pvop->op_type = type;
2568 pvop->op_ppaddr = ppaddr[type];
2569 pvop->op_pv = pv;
2570 pvop->op_next = (OP*)pvop;
2571 pvop->op_flags = flags;
2572 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2573 scalar((OP*)pvop);
79072805 2574 if (opargs[type] & OA_TARGET)
ed6116ce 2575 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2576 return CHECKOP(type, pvop);
79072805
LW		 2577}
2578
79072805 2579void
8ac85365 2580package(OP *o)
79072805 2581{
11343788 2582 dTHR;
93a17b20 2583 SV *sv;
79072805 2584
3280af22
NIS		 2585 save_hptr(&PL_curstash);
2586 save_item(PL_curstname);
11343788 2587 if (o) {
463ee0b2
LW		 2588 STRLEN len;
2589 char *name;
11343788 2590 sv = cSVOPo->op_sv;
463ee0b2 2591 name = SvPV(sv, len);
3280af22
NIS		 2592 PL_curstash = gv_stashpvn(name,len,TRUE);
2593 sv_setpvn(PL_curstname, name, len);
11343788 2594 op_free(o);
93a17b20
LW		 2595 }
2596 else {
3280af22
NIS		 2597 sv_setpv(PL_curstname,"<none>");
2598 PL_curstash = Nullhv;
93a17b20 2599 }
3280af22
NIS		 2600 PL_copline = NOLINE;
2601 PL_expect = XSTATE;
79072805
LW		 2602}
2603
85e6fe83 2604void
8ac85365 2605utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2606{
a0d0e21e
LW		 2607 OP *pack;
2608 OP *meth;
2609 OP *rqop;
2610 OP *imop;
b1cb66bf 2611 OP *veop;
78ca652e 2612 GV *gv;
85e6fe83 2613
a0d0e21e
LW		 2614 if (id->op_type != OP_CONST)
2615 croak("Module name must be constant");
85e6fe83 2616
b1cb66bf 2617 veop = Nullop;
2618
2619 if(version != Nullop) {
2620 SV *vesv = ((SVOP*)version)->op_sv;
2621
2622 if (arg == Nullop && !SvNIOK(vesv)) {
2623 arg = version;
2624 }
2625 else {
2626 OP *pack;
2627 OP *meth;
2628
2629 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2630 croak("Version number must be constant number");
2631
2632 /* Make copy of id so we don't free it twice */
2633 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2634
2635 /* Fake up a method call to VERSION */
2636 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2637 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2638 append_elem(OP_LIST,
2639 prepend_elem(OP_LIST, pack, list(version)),
2640 newUNOP(OP_METHOD, 0, meth)));
2641 }
2642 }
aeea060c 2643
a0d0e21e 2644 /* Fake up an import/unimport */
4633a7c4
LW		 2645 if (arg && arg->op_type == OP_STUB)
2646 imop = arg; /* no import on explicit () */
b1cb66bf 2647 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2648 imop = Nullop; /* use 5.0; */
2649 }
4633a7c4
LW		 2650 else {
2651 /* Make copy of id so we don't free it twice */
2652 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2653 meth = newSVOP(OP_CONST, 0,
2654 aver
2655 ? newSVpv("import", 6)
2656 : newSVpv("unimport", 8)
2657 );
2658 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2659 append_elem(OP_LIST,
2660 prepend_elem(OP_LIST, pack, list(arg)),
2661 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2662 }
2663
78ca652e
GS		 2664 /* Fake up a require, handle override, if any */
2665 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2666 if (!(gv && GvIMPORTED_CV(gv)))
2667 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2668
2669 if (gv && GvIMPORTED_CV(gv)) {
2670 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2671 append_elem(OP_LIST, id,
2672 scalar(newUNOP(OP_RV2CV, 0,
2673 newGVOP(OP_GV, 0,
2674 gv))))));
2675 }
2676 else {
2677 rqop = newUNOP(OP_REQUIRE, 0, id);
2678 }
a0d0e21e
LW		 2679
2680 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2681 newSUB(floor,
a0d0e21e 2682 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2683 Nullop,
a0d0e21e 2684 append_elem(OP_LINESEQ,
b1cb66bf 2685 append_elem(OP_LINESEQ,
2686 newSTATEOP(0, Nullch, rqop),
2687 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2688 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2689
3280af22
NIS		 2690 PL_copline = NOLINE;
2691 PL_expect = XSTATE;
85e6fe83
LW		 2692}
2693
79072805 2694OP *
78ca652e
GS		 2695dofile(OP *term)
2696{
2697 OP *doop;
2698 GV *gv;
2699
2700 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2701 if (!(gv && GvIMPORTED_CV(gv)))
2702 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2703
2704 if (gv && GvIMPORTED_CV(gv)) {
2705 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2706 append_elem(OP_LIST, term,
2707 scalar(newUNOP(OP_RV2CV, 0,
2708 newGVOP(OP_GV, 0,
2709 gv))))));
2710 }
2711 else {
2712 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2713 }
2714 return doop;
2715}
2716
2717OP *
8ac85365 2718newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2719{
2720 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2721 list(force_list(subscript)),
2722 list(force_list(listval)) );
79072805
LW		 2723}
2724
76e3520e 2725STATIC I32
8ac85365 2726list_assignment(register OP *o)
79072805 2727{
11343788 2728 if (!o)
79072805
LW		 2729 return TRUE;
2730
11343788
MB		 2731 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2732 o = cUNOPo->op_first;
79072805 2733
11343788
MB		 2734 if (o->op_type == OP_COND_EXPR) {
2735 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2736 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2737
2738 if (t && f)
2739 return TRUE;
2740 if (t || f)
2741 yyerror("Assignment to both a list and a scalar");
2742 return FALSE;
2743 }
2744
11343788
MB		 2745 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2746 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2747 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2748 return TRUE;
2749
11343788 2750 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2751 return TRUE;
2752
11343788 2753 if (o->op_type == OP_RV2SV)
79072805
LW		 2754 return FALSE;
2755
2756 return FALSE;
2757}
2758
2759OP *
8ac85365 2760newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2761{
11343788 2762 OP *o;
79072805 2763
a0d0e21e
LW		 2764 if (optype) {
2765 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2766 return newLOGOP(optype, 0,
2767 mod(scalar(left), optype),
2768 newUNOP(OP_SASSIGN, 0, scalar(right)));
2769 }
2770 else {
2771 return newBINOP(optype, OPf_STACKED,
2772 mod(scalar(left), optype), scalar(right));
2773 }
2774 }
2775
79072805 2776 if (list_assignment(left)) {
6ee623d5 2777 dTHR;
3280af22
NIS		 2778 PL_modcount = 0;
2779 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2780 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2781 if (PL_eval_start)
2782 PL_eval_start = 0;
748a9306 2783 else {
a0d0e21e
LW		 2784 op_free(left);
2785 op_free(right);
2786 return Nullop;
2787 }
11343788 2788 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2789 list(force_list(right)),
2790 list(force_list(left)) );
11343788 2791 o->op_private = 0 | (flags >> 8);
a0d0e21e 2792 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2793 OP *curop;
11343788 2794 OP *lastop = o;
3280af22 2795 PL_generation++;
11343788 2796 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2797 if (opargs[curop->op_type] & OA_DANGEROUS) {
2798 if (curop->op_type == OP_GV) {
2799 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2800 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2801 break;
3280af22 2802 SvCUR(gv) = PL_generation;
79072805 2803 }
748a9306
LW		 2804 else if (curop->op_type == OP_PADSV ||
2805 curop->op_type == OP_PADAV ||
2806 curop->op_type == OP_PADHV ||
2807 curop->op_type == OP_PADANY) {
3280af22 2808 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2809 SV *sv = svp[curop->op_targ];
3280af22 2810 if (SvCUR(sv) == PL_generation)
748a9306 2811 break;
3280af22 2812 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2813 }
79072805
LW		 2814 else if (curop->op_type == OP_RV2CV)
2815 break;
2816 else if (curop->op_type == OP_RV2SV ||
2817 curop->op_type == OP_RV2AV ||
2818 curop->op_type == OP_RV2HV ||
2819 curop->op_type == OP_RV2GV) {
2820 if (lastop->op_type != OP_GV) /* funny deref? */
2821 break;
2822 }
1167e5da
SM		 2823 else if (curop->op_type == OP_PUSHRE) {
2824 if (((PMOP*)curop)->op_pmreplroot) {
2825 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2826 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2827 break;
3280af22 2828 SvCUR(gv) = PL_generation;
1167e5da
SM		 2829 }
2830 }
79072805
LW		 2831 else
2832 break;
2833 }
2834 lastop = curop;
2835 }
11343788
MB		 2836 if (curop != o)
2837 o->op_private = OPpASSIGN_COMMON;
79072805 2838 }
c07a80fd 2839 if (right && right->op_type == OP_SPLIT) {
2840 OP* tmpop;
2841 if ((tmpop = ((LISTOP*)right)->op_first) &&
2842 tmpop->op_type == OP_PUSHRE)
2843 {
2844 PMOP *pm = (PMOP*)tmpop;
2845 if (left->op_type == OP_RV2AV &&
2846 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2847 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2848 {
2849 tmpop = ((UNOP*)left)->op_first;
2850 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2851 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2852 pm->op_pmflags |= PMf_ONCE;
11343788 2853 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2854 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2855 tmpop->op_sibling = Nullop; /* don't free split */
2856 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2857 op_free(o); /* blow off assign */
54310121 2858 right->op_flags &= ~OPf_WANT;
a5f75d66 2859 /* "I don't know and I don't care." */
c07a80fd 2860 return right;
2861 }
2862 }
2863 else {
3280af22 2864 if (PL_modcount < 10000 &&
c07a80fd 2865 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2866 {
2867 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2868 if (SvIVX(sv) == 0)
3280af22 2869 sv_setiv(sv, PL_modcount+1);
c07a80fd 2870 }
2871 }
2872 }
2873 }
11343788 2874 return o;
79072805
LW		 2875 }
2876 if (!right)
2877 right = newOP(OP_UNDEF, 0);
2878 if (right->op_type == OP_READLINE) {
2879 right->op_flags |= OPf_STACKED;
463ee0b2 2880 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2881 }
a0d0e21e 2882 else {
3280af22 2883 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2884 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2885 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 2886 if (PL_eval_start)
2887 PL_eval_start = 0;
748a9306 2888 else {
11343788 2889 op_free(o);
a0d0e21e
LW		 2890 return Nullop;
2891 }
2892 }
11343788 2893 return o;
79072805
LW		 2894}
2895
2896OP *
8ac85365 2897newSTATEOP(I32 flags, char *label, OP *o)
79072805 2898{
11343788 2899 dTHR;
bbce6d69 2900 U32 seq = intro_my();
79072805
LW		 2901 register COP *cop;
2902
2903 Newz(1101, cop, 1, COP);
3280af22 2904 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307
LW		 2905 cop->op_type = OP_DBSTATE;
2906 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2907 }
2908 else {
2909 cop->op_type = OP_NEXTSTATE;
2910 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2911 }
79072805 2912 cop->op_flags = flags;
a0ed51b3 2913 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 2914#ifdef NATIVE_HINTS
2915 cop->op_private |= NATIVE_HINTS;
2916#endif
e24b16f9 2917 PL_compiling.op_private = cop->op_private;
79072805
LW		 2918 cop->op_next = (OP*)cop;
2919
463ee0b2
LW		 2920 if (label) {
2921 cop->cop_label = label;
3280af22 2922 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 2923 }
bbce6d69 2924 cop->cop_seq = seq;
3280af22 2925 cop->cop_arybase = PL_curcop->cop_arybase;
599cee73
PM		 2926 if (PL_curcop->cop_warnings == WARN_NONE
2927 || PL_curcop->cop_warnings == WARN_ALL)
2928 cop->cop_warnings = PL_curcop->cop_warnings ;
2929 else
2930 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
2931
79072805 2932
3280af22
NIS		 2933 if (PL_copline == NOLINE)
2934 cop->cop_line = PL_curcop->cop_line;
79072805 2935 else {
3280af22
NIS		 2936 cop->cop_line = PL_copline;
2937 PL_copline = NOLINE;
79072805 2938 }
3280af22
NIS		 2939 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
2940 cop->cop_stash = PL_curstash;
79072805 2941
3280af22
NIS		 2942 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2943 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2944 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 2945 (void)SvIOK_on(*svp);
a5f75d66 2946 SvIVX(*svp) = 1;
93a17b20
LW		 2947 SvSTASH(*svp) = (HV*)cop;
2948 }
2949 }
2950
11343788 2951 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2952}
2953
bbce6d69 2954/* "Introduce" my variables to visible status. */
2955U32
8ac85365 2956intro_my(void)
bbce6d69 2957{
2958 SV **svp;
2959 SV *sv;
2960 I32 i;
2961
3280af22
NIS		 2962 if (! PL_min_intro_pending)
2963 return PL_cop_seqmax;
bbce6d69 2964
3280af22
NIS		 2965 svp = AvARRAY(PL_comppad_name);
2966 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
2967 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 2968 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
3280af22 2969 SvNVX(sv) = (double)PL_cop_seqmax;
bbce6d69 2970 }
2971 }
3280af22
NIS		 2972 PL_min_intro_pending = 0;
2973 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
2974 return PL_cop_seqmax++;
bbce6d69 2975}
2976
79072805 2977OP *
8ac85365 2978newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2979{
883ffac3
CS		 2980 return new_logop(type, flags, &first, &other);
2981}
2982
3bd495df 2983STATIC OP *
883ffac3
CS		 2984new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2985{
11343788 2986 dTHR;
79072805 2987 LOGOP *logop;
11343788 2988 OP *o;
883ffac3
CS		 2989 OP *first = *firstp;
2990 OP *other = *otherp;
79072805 2991
a0d0e21e
LW		 2992 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2993 return newBINOP(type, flags, scalar(first), scalar(other));
2994
8990e307 2995 scalarboolean(first);
79072805
LW		 2996 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2997 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2998 if (type == OP_AND || type == OP_OR) {
2999 if (type == OP_AND)
3000 type = OP_OR;
3001 else
3002 type = OP_AND;
11343788 3003 o = first;
883ffac3 3004 first = *firstp = cUNOPo->op_first;
11343788
MB		 3005 if (o->op_next)
3006 first->op_next = o->op_next;
3007 cUNOPo->op_first = Nullop;
3008 op_free(o);
79072805
LW		 3009 }
3010 }
3011 if (first->op_type == OP_CONST) {
599cee73
PM		 3012 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
3013 warner(WARN_PRECEDENCE, "Probable precedence problem on %s",
3014 op_desc[type]);
79072805
LW		 3015 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3016 op_free(first);
883ffac3 3017 *firstp = Nullop;
79072805
LW		 3018 return other;
3019 }
3020 else {
3021 op_free(other);
883ffac3 3022 *otherp = Nullop;
79072805
LW		 3023 return first;
3024 }
3025 }
3026 else if (first->op_type == OP_WANTARRAY) {
3027 if (type == OP_AND)
3028 list(other);
3029 else
3030 scalar(other);
3031 }
599cee73 3032 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3033 OP *k1 = ((UNOP*)first)->op_first;
3034 OP *k2 = k1->op_sibling;
3035 OPCODE warnop = 0;
3036 switch (first->op_type)
3037 {
3038 case OP_NULL:
3039 if (k2 && k2->op_type == OP_READLINE
3040 && (k2->op_flags & OPf_STACKED)
55d729e4 3041 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3042 warnop = k2->op_type;
3043 break;
3044
3045 case OP_SASSIGN:
68dc0745 3046 if (k1->op_type == OP_READDIR
3047 || k1->op_type == OP_GLOB
3048 || k1->op_type == OP_EACH)
a6006777 3049 warnop = k1->op_type;
3050 break;
3051 }
8ebc5c01 3052 if (warnop) {
3280af22
NIS		 3053 line_t oldline = PL_curcop->cop_line;
3054 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3055 warner(WARN_UNSAFE,
3056 "Value of %s%s can be \"0\"; test with defined()",
68dc0745 3057 op_desc[warnop],
3058 ((warnop == OP_READLINE || warnop == OP_GLOB)
3059 ? " construct" : "() operator"));
3280af22 3060 PL_curcop->cop_line = oldline;
8ebc5c01 3061 }
a6006777 3062 }
79072805
LW		 3063
3064 if (!other)
3065 return first;
3066
a0d0e21e
LW		 3067 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3068 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3069
79072805
LW		 3070 Newz(1101, logop, 1, LOGOP);
3071
3072 logop->op_type = type;
3073 logop->op_ppaddr = ppaddr[type];
3074 logop->op_first = first;
3075 logop->op_flags = flags | OPf_KIDS;
3076 logop->op_other = LINKLIST(other);
c07a80fd 3077 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3078
3079 /* establish postfix order */
3080 logop->op_next = LINKLIST(first);
3081 first->op_next = (OP*)logop;
3082 first->op_sibling = other;
3083
11343788
MB		 3084 o = newUNOP(OP_NULL, 0, (OP*)logop);
3085 other->op_next = o;
79072805 3086
11343788 3087 return o;
79072805
LW		 3088}
3089
3090OP *
8ac85365 3091newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3092{
11343788 3093 dTHR;
79072805 3094 CONDOP *condop;
11343788 3095 OP *o;
79072805 3096
b1cb66bf 3097 if (!falseop)
3098 return newLOGOP(OP_AND, 0, first, trueop);
3099 if (!trueop)
3100 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3101
8990e307 3102 scalarboolean(first);
79072805
LW		 3103 if (first->op_type == OP_CONST) {
3104 if (SvTRUE(((SVOP*)first)->op_sv)) {
3105 op_free(first);
b1cb66bf 3106 op_free(falseop);
3107 return trueop;
79072805
LW		 3108 }
3109 else {
3110 op_free(first);
b1cb66bf 3111 op_free(trueop);
3112 return falseop;
79072805
LW		 3113 }
3114 }
3115 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3116 list(trueop);
3117 scalar(falseop);
79072805
LW		 3118 }
3119 Newz(1101, condop, 1, CONDOP);
3120
3121 condop->op_type = OP_COND_EXPR;
3122 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
3123 condop->op_first = first;
3124 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 3125 condop->op_true = LINKLIST(trueop);
3126 condop->op_false = LINKLIST(falseop);
c07a80fd 3127 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3128
3129 /* establish postfix order */
3130 condop->op_next = LINKLIST(first);
3131 first->op_next = (OP*)condop;
3132
b1cb66bf 3133 first->op_sibling = trueop;
3134 trueop->op_sibling = falseop;
11343788 3135 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 3136
5dc0d613
MB		 3137 trueop->op_next = o;
3138 falseop->op_next = o;
79072805 3139
11343788 3140 return o;
79072805
LW		 3141}
3142
3143OP *
8ac85365 3144newRANGE(I32 flags, OP *left, OP *right)
79072805 3145{
b35b2403 3146 dTHR;
79072805
LW		 3147 CONDOP *condop;
3148 OP *flip;
3149 OP *flop;
11343788 3150 OP *o;
79072805
LW		 3151
3152 Newz(1101, condop, 1, CONDOP);
3153
3154 condop->op_type = OP_RANGE;
3155 condop->op_ppaddr = ppaddr[OP_RANGE];
3156 condop->op_first = left;
3157 condop->op_flags = OPf_KIDS;
3158 condop->op_true = LINKLIST(left);
3159 condop->op_false = LINKLIST(right);
c07a80fd 3160 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3161
3162 left->op_sibling = right;
3163
3164 condop->op_next = (OP*)condop;
3165 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
3166 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3167 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 3168 linklist(flop);
3169
3170 left->op_next = flip;
3171 right->op_next = flop;
3172
ed6116ce 3173 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 3174 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 3175 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3176 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3177
3178 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3179 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3180
11343788 3181 flip->op_next = o;
79072805 3182 if (!flip->op_private || !flop->op_private)
11343788 3183 linklist(o); /* blow off optimizer unless constant */
79072805 3184
11343788 3185 return o;
79072805
LW		 3186}
3187
3188OP *
8ac85365 3189newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3190{
11343788 3191 dTHR;
463ee0b2 3192 OP* listop;
11343788 3193 OP* o;
463ee0b2 3194 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3195 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3196
463ee0b2
LW		 3197 if (expr) {
3198 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3199 return block; /* do {} while 0 does once */
fb73857a 3200 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3201 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3202 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3203 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3204 } else if (expr->op_flags & OPf_KIDS) {
3205 OP *k1 = ((UNOP*)expr)->op_first;
3206 OP *k2 = (k1) ? k1->op_sibling : NULL;
3207 switch (expr->op_type) {
3208 case OP_NULL:
3209 if (k2 && k2->op_type == OP_READLINE
3210 && (k2->op_flags & OPf_STACKED)
3211 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3212 expr = newUNOP(OP_DEFINED, 0, expr);
3213 break;
3214
3215 case OP_SASSIGN:
3216 if (k1->op_type == OP_READDIR
3217 || k1->op_type == OP_GLOB
3218 || k1->op_type == OP_EACH)
3219 expr = newUNOP(OP_DEFINED, 0, expr);
3220 break;
3221 }
774d564b 3222 }
463ee0b2 3223 }
93a17b20 3224
8990e307 3225 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3226 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3227
883ffac3
CS		 3228 if (listop)
3229 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3230
11343788
MB		 3231 if (once && o != listop)
3232 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3233
11343788
MB		 3234 if (o == listop)
3235 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3236
11343788
MB		 3237 o->op_flags |= flags;
3238 o = scope(o);
3239 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3240 return o;
79072805
LW		 3241}
3242
3243OP *
8ac85365 3244newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3245{
11343788 3246 dTHR;
79072805
LW		 3247 OP *redo;
3248 OP *next = 0;
3249 OP *listop;
11343788 3250 OP *o;
79072805
LW		 3251 OP *condop;
3252
fb73857a 3253 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3254 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3255 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3256 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3257 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3258 OP *k1 = ((UNOP*)expr)->op_first;
3259 OP *k2 = (k1) ? k1->op_sibling : NULL;
3260 switch (expr->op_type) {
3261 case OP_NULL:
3262 if (k2 && k2->op_type == OP_READLINE
3263 && (k2->op_flags & OPf_STACKED)
3264 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3265 expr = newUNOP(OP_DEFINED, 0, expr);
3266 break;
3267
3268 case OP_SASSIGN:
3269 if (k1->op_type == OP_READDIR
3270 || k1->op_type == OP_GLOB
3271 || k1->op_type == OP_EACH)
3272 expr = newUNOP(OP_DEFINED, 0, expr);
3273 break;
3274 }
748a9306 3275 }
79072805
LW		 3276
3277 if (!block)
3278 block = newOP(OP_NULL, 0);
3279
3280 if (cont)
3281 next = LINKLIST(cont);
fb73857a 3282 if (expr) {
79072805 3283 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3284 if ((line_t)whileline != NOLINE) {
3280af22 3285 PL_copline = whileline;
fb73857a 3286 cont = append_elem(OP_LINESEQ, cont,
3287 newSTATEOP(0, Nullch, Nullop));
3288 }
3289 }
79072805 3290
463ee0b2 3291 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3292 redo = LINKLIST(listop);
3293
3294 if (expr) {
3280af22 3295 PL_copline = whileline;
883ffac3
CS		 3296 scalar(listop);
3297 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3298 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3299 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3300 op_free((OP*)loop);
883ffac3 3301 return Nullop; /* listop already freed by new_logop */
463ee0b2 3302 }
883ffac3
CS		 3303 if (listop)
3304 ((LISTOP*)listop)->op_last->op_next = condop =
3305 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3306 if (!next)
3307 next = condop;
3308 }
3309 else
11343788 3310 o = listop;
79072805
LW		 3311
3312 if (!loop) {
3313 Newz(1101,loop,1,LOOP);
3314 loop->op_type = OP_ENTERLOOP;
3315 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
3316 loop->op_private = 0;
3317 loop->op_next = (OP*)loop;
3318 }
3319
11343788 3320 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3321
3322 loop->op_redoop = redo;
11343788 3323 loop->op_lastop = o;
79072805
LW		 3324
3325 if (next)
3326 loop->op_nextop = next;
3327 else
11343788 3328 loop->op_nextop = o;
79072805 3329
11343788
MB		 3330 o->op_flags |= flags;
3331 o->op_private |= (flags >> 8);
3332 return o;
79072805
LW		 3333}
3334
3335OP *
8990e307 3336newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3337{
3338 LOOP *loop;
fb73857a 3339 OP *wop;
85e6fe83 3340 int padoff = 0;
4633a7c4 3341 I32 iterflags = 0;
79072805 3342
79072805 3343 if (sv) {
85e6fe83 3344 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 3345 sv->op_type = OP_RV2GV;
3346 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 3347 }
85e6fe83
LW		 3348 else if (sv->op_type == OP_PADSV) { /* private variable */
3349 padoff = sv->op_targ;
3350 op_free(sv);
3351 sv = Nullop;
3352 }
54b9620d
MB		 3353 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3354 padoff = sv->op_targ;
3355 iterflags |= OPf_SPECIAL;
3356 op_free(sv);
3357 sv = Nullop;
3358 }
79072805 3359 else
c07a80fd 3360 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 3361 }
3362 else {
54b9620d
MB		 3363#ifdef USE_THREADS
3364 padoff = find_threadsv("_");
3365 iterflags |= OPf_SPECIAL;
3366#else
3280af22 3367 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3368#endif
79072805 3369 }
5f05dabc 3370 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3371 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3372 iterflags |= OPf_STACKED;
3373 }
89ea2908
GA		 3374 else if (expr->op_type == OP_NULL &&
3375 (expr->op_flags & OPf_KIDS) &&
3376 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3377 {
3378 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3379 * set the STACKED flag to indicate that these values are to be
3380 * treated as min/max values by 'pp_iterinit'.
3381 */
3382 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3383 CONDOP* range = (CONDOP*) flip->op_first;
3384 OP* left = range->op_first;
3385 OP* right = left->op_sibling;
5152d7c7 3386 LISTOP* listop;
89ea2908
GA		 3387
3388 range->op_flags &= ~OPf_KIDS;
3389 range->op_first = Nullop;
3390
5152d7c7
GS		 3391 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3392 listop->op_first->op_next = range->op_true;
89ea2908 3393 left->op_next = range->op_false;
5152d7c7
GS		 3394 right->op_next = (OP*)listop;
3395 listop->op_next = listop->op_first;
89ea2908
GA		 3396
3397 op_free(expr);
5152d7c7 3398 expr = (OP*)(listop);
89ea2908
GA		 3399 null(expr);
3400 iterflags |= OPf_STACKED;
3401 }
3402 else {
3403 expr = mod(force_list(expr), OP_GREPSTART);
3404 }
3405
3406
4633a7c4 3407 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3408 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3409 assert(!loop->op_next);
3410 Renew(loop, 1, LOOP);
3411 loop->op_targ = padoff;
fb73857a 3412 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3413 PL_copline = forline;
fb73857a 3414 return newSTATEOP(0, label, wop);
79072805
LW		 3415}
3416
8990e307 3417OP*
8ac85365 3418newLOOPEX(I32 type, OP *label)
8990e307 3419{
11343788
MB		 3420 dTHR;
3421 OP *o;
8990e307 3422 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3423 /* "last()" means "last" */
3424 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3425 o = newOP(type, OPf_SPECIAL);
3426 else {
3427 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3280af22 3428 ? SvPVx(((SVOP*)label)->op_sv, PL_na)
cdaebead
MB		 3429 : ""));
3430 }
8990e307
LW		 3431 op_free(label);
3432 }
3433 else {
a0d0e21e
LW		 3434 if (label->op_type == OP_ENTERSUB)
3435 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3436 o = newUNOP(type, OPf_STACKED, label);
8990e307 3437 }
3280af22 3438 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3439 return o;
8990e307
LW		 3440}
3441
79072805 3442void
8ac85365 3443cv_undef(CV *cv)
79072805 3444{
11343788
MB		 3445 dTHR;
3446#ifdef USE_THREADS
e858de61
MB		 3447 if (CvMUTEXP(cv)) {
3448 MUTEX_DESTROY(CvMUTEXP(cv));
3449 Safefree(CvMUTEXP(cv));
3450 CvMUTEXP(cv) = 0;
3451 }
11343788
MB		 3452#endif /* USE_THREADS */
3453
a0d0e21e 3454 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3455#ifdef USE_THREADS
3456 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3457 croak("Can't undef active subroutine");
3458#else
a0d0e21e
LW		 3459 if (CvDEPTH(cv))
3460 croak("Can't undef active subroutine");
11343788 3461#endif /* USE_THREADS */
8990e307 3462 ENTER;
a0d0e21e 3463
3280af22
NIS		 3464 SAVESPTR(PL_curpad);
3465 PL_curpad = 0;
a0d0e21e 3466
a5f75d66 3467 if (!CvCLONED(cv))
748a9306 3468 op_free(CvROOT(cv));
79072805 3469 CvROOT(cv) = Nullop;
8990e307 3470 LEAVE;
79072805 3471 }
1d5db326 3472 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3473 CvFLAGS(cv) = 0;
8e07c86e
AD		 3474 SvREFCNT_dec(CvGV(cv));
3475 CvGV(cv) = Nullgv;
3476 SvREFCNT_dec(CvOUTSIDE(cv));
3477 CvOUTSIDE(cv) = Nullcv;
3478 if (CvPADLIST(cv)) {
8ebc5c01 3479 /* may be during global destruction */
3480 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3481 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3482 while (i >= 0) {
3483 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3484 SV* sv = svp ? *svp : Nullsv;
3485 if (!sv)
3486 continue;
3280af22
NIS		 3487 if (sv == (SV*)PL_comppad_name)
3488 PL_comppad_name = Nullav;
3489 else if (sv == (SV*)PL_comppad) {
3490 PL_comppad = Nullav;
3491 PL_curpad = Null(SV**);
46fc3d4c 3492 }
3493 SvREFCNT_dec(sv);
8ebc5c01 3494 }
3495 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3496 }
8e07c86e
AD		 3497 CvPADLIST(cv) = Nullav;
3498 }
79072805
LW		 3499}
3500
5f05dabc 3501#ifdef DEBUG_CLOSURES
76e3520e 3502STATIC void
5f05dabc 3503cv_dump(cv)
3504CV* cv;
3505{
3506 CV *outside = CvOUTSIDE(cv);
3507 AV* padlist = CvPADLIST(cv);
4fdae800 3508 AV* pad_name;
3509 AV* pad;
3510 SV** pname;
3511 SV** ppad;
5f05dabc 3512 I32 ix;
3513
fb73857a 3514 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3515 cv,
3516 (CvANON(cv) ? "ANON"
6b88bc9c 3517 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3518 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3519 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3520 outside,
3521 (!outside ? "null"
3522 : CvANON(outside) ? "ANON"
6b88bc9c 3523 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3524 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3525 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3526
4fdae800 3527 if (!padlist)
3528 return;
3529
3530 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3531 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3532 pname = AvARRAY(pad_name);
3533 ppad = AvARRAY(pad);
3534
93965878 3535 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3536 if (SvPOK(pname[ix]))
fb73857a 3537 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3538 ix, ppad[ix],
3539 SvFAKE(pname[ix]) ? "FAKE " : "",
3540 SvPVX(pname[ix]),
ab50184a
CS		 3541 (long)I_32(SvNVX(pname[ix])),
3542 (long)SvIVX(pname[ix]));
5f05dabc 3543 }
3544}
3545#endif /* DEBUG_CLOSURES */
3546
76e3520e 3547STATIC CV *
8ac85365 3548cv_clone2(CV *proto, CV *outside)
748a9306 3549{
11343788 3550 dTHR;
748a9306
LW		 3551 AV* av;
3552 I32 ix;
3553 AV* protopadlist = CvPADLIST(proto);
3554 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3555 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3556 SV** pname = AvARRAY(protopad_name);
3557 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3558 I32 fname = AvFILLp(protopad_name);
3559 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3560 AV* comppadlist;
3561 CV* cv;
3562
07055b4c
CS		 3563 assert(!CvUNIQUE(proto));
3564
748a9306 3565 ENTER;
3280af22
NIS		 3566 SAVESPTR(PL_curpad);
3567 SAVESPTR(PL_comppad);
3568 SAVESPTR(PL_comppad_name);
3569 SAVESPTR(PL_compcv);
748a9306 3570
3280af22 3571 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3572 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3573 CvCLONED_on(cv);
5f05dabc 3574 if (CvANON(proto))
3575 CvANON_on(cv);
748a9306 3576
11343788 3577#ifdef USE_THREADS
12ca11f6 3578 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3579 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3580 CvOWNER(cv) = 0;
3581#endif /* USE_THREADS */
748a9306 3582 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3583 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3584 CvSTASH(cv) = CvSTASH(proto);
3585 CvROOT(cv) = CvROOT(proto);
3586 CvSTART(cv) = CvSTART(proto);
5f05dabc 3587 if (outside)
3588 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3589
68dc0745 3590 if (SvPOK(proto))
3591 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3592
3280af22 3593 PL_comppad_name = newAV();
46fc3d4c 3594 for (ix = fname; ix >= 0; ix--)
3280af22 3595 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3596
3280af22 3597 PL_comppad = newAV();
748a9306
LW		 3598
3599 comppadlist = newAV();
3600 AvREAL_off(comppadlist);
3280af22
NIS		 3601 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3602 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3603 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3604 av_fill(PL_comppad, AvFILLp(protopad));
3605 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3606
3607 av = newAV(); /* will be @_ */
3608 av_extend(av, 0);
3280af22 3609 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3610 AvFLAGS(av) = AVf_REIFY;
3611
9607fc9c 3612 for (ix = fpad; ix > 0; ix--) {
3613 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3614 if (namesv && namesv != &PL_sv_undef) {
aa689395 3615 char *name = SvPVX(namesv); /* XXX */
3616 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3617 I32 off = pad_findlex(name, ix, SvIVX(namesv),
155fc61f 3618 CvOUTSIDE(cv), cxstack_ix, 0);
5f05dabc 3619 if (!off)
3280af22 3620 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3621 else if (off != ix)
748a9306
LW		 3622 croak("panic: cv_clone: %s", name);
3623 }
3624 else { /* our own lexical */
aa689395 3625 SV* sv;
5f05dabc 3626 if (*name == '&') {
3627 /* anon code -- we'll come back for it */
3628 sv = SvREFCNT_inc(ppad[ix]);
3629 }
3630 else if (*name == '@')
3631 sv = (SV*)newAV();
748a9306 3632 else if (*name == '%')
5f05dabc 3633 sv = (SV*)newHV();
748a9306 3634 else
5f05dabc 3635 sv = NEWSV(0,0);
3636 if (!SvPADBUSY(sv))
3637 SvPADMY_on(sv);
3280af22 3638 PL_curpad[ix] = sv;
748a9306
LW		 3639 }
3640 }
3641 else {
aa689395 3642 SV* sv = NEWSV(0,0);
748a9306 3643 SvPADTMP_on(sv);
3280af22 3644 PL_curpad[ix] = sv;
748a9306
LW		 3645 }
3646 }
3647
5f05dabc 3648 /* Now that vars are all in place, clone nested closures. */
3649
9607fc9c 3650 for (ix = fpad; ix > 0; ix--) {
3651 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3652 if (namesv
3280af22 3653 && namesv != &PL_sv_undef
aa689395 3654 && !(SvFLAGS(namesv) & SVf_FAKE)
3655 && *SvPVX(namesv) == '&'
5f05dabc 3656 && CvCLONE(ppad[ix]))
3657 {
3658 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3659 SvREFCNT_dec(ppad[ix]);
3660 CvCLONE_on(kid);
3661 SvPADMY_on(kid);
3280af22 3662 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3663 }
3664 }
3665
5f05dabc 3666#ifdef DEBUG_CLOSURES
ab50184a
CS		 3667 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3668 cv_dump(outside);
3669 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3670 cv_dump(proto);
ab50184a 3671 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3672 cv_dump(cv);
3673#endif
3674
748a9306
LW		 3675 LEAVE;
3676 return cv;
3677}
3678
3679CV *
8ac85365 3680cv_clone(CV *proto)
5f05dabc 3681{
3682 return cv_clone2(proto, CvOUTSIDE(proto));
3683}
3684
3fe9a6f1 3685void
8ac85365 3686cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3687{
3688 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3689 SV* msg = sv_newmortal();
3fe9a6f1 3690 SV* name = Nullsv;
3691
3692 if (gv)
46fc3d4c 3693 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3694 sv_setpv(msg, "Prototype mismatch:");
3695 if (name)
fc36a67e 3696 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3697 if (SvPOK(cv))
46fc3d4c 3698 sv_catpvf(msg, " (%s)", SvPVX(cv));
3699 sv_catpv(msg, " vs ");
3700 if (p)
3701 sv_catpvf(msg, "(%s)", p);
3702 else
3703 sv_catpv(msg, "none");
fc36a67e 3704 warn("%_", msg);
3fe9a6f1 3705 }
3706}
3707
760ac839 3708SV *
8ac85365 3709cv_const_sv(CV *cv)
760ac839 3710{
54310121 3711 if (!cv || !SvPOK(cv) || SvCUR(cv))
3712 return Nullsv;
fe5e78ed
GS		 3713 return op_const_sv(CvSTART(cv), cv);
3714}
760ac839 3715
fe5e78ed
GS		 3716SV *
3717op_const_sv(OP *o, CV *cv)
3718{
3719 SV *sv = Nullsv;
3720
3721 if(!o)
3722 return Nullsv;
3723
3724 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3725 o = cLISTOPo->op_first->op_sibling;
3726
3727 for (; o; o = o->op_next) {
54310121 3728 OPCODE type = o->op_type;
fe5e78ed
GS		 3729
3730 if(sv && o->op_next == o)
3731 return sv;
54310121 3732 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3733 continue;
3734 if (type == OP_LEAVESUB || type == OP_RETURN)
3735 break;
3736 if (sv)
3737 return Nullsv;
3738 if (type == OP_CONST)
5dc0d613 3739 sv = cSVOPo->op_sv;
fe5e78ed 3740 else if (type == OP_PADSV && cv) {
e858de61
MB		 3741 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3742 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3743 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3744 return Nullsv;
760ac839 3745 }
54310121 3746 else
3747 return Nullsv;
760ac839 3748 }
5aabfad6 3749 if (sv)
3750 SvREADONLY_on(sv);
760ac839
LW		 3751 return sv;
3752}
3753
748a9306 3754CV *
8ac85365 3755newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3756{
11343788 3757 dTHR;
3280af22 3758 char *name = o ? SvPVx(cSVOPo->op_sv, PL_na) : Nullch;
55d729e4
GS		 3759 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3760 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
3280af22 3761 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, PL_na) : Nullch;
a2008d6d 3762 register CV *cv=0;
a0d0e21e 3763 I32 ix;
79072805 3764
11343788 3765 if (o)
5dc0d613 3766 SAVEFREEOP(o);
3fe9a6f1 3767 if (proto)
3768 SAVEFREEOP(proto);
3769
55d729e4
GS		 3770 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3771 maximum a prototype before. */
3772 if (SvTYPE(gv) > SVt_NULL) {
3773 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1))
3774 warn("Runaway prototype");
3775 cv_ckproto((CV*)gv, NULL, ps);
3776 }
3777 if (ps)
3778 sv_setpv((SV*)gv, ps);
3779 else
3780 sv_setiv((SV*)gv, -1);
3280af22
NIS		 3781 SvREFCNT_dec(PL_compcv);
3782 cv = PL_compcv = NULL;
3783 PL_sub_generation++;
55d729e4
GS		 3784 goto noblock;
3785 }
3786
68dc0745 3787 if (!name || GvCVGEN(gv))
3788 cv = Nullcv;
3789 else if (cv = GvCV(gv)) {
3fe9a6f1 3790 cv_ckproto(cv, gv, ps);
68dc0745 3791 /* already defined (or promised)? */
3792 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3793 SV* const_sv;
fe5e78ed 3794 bool const_changed = TRUE;
aa689395 3795 if (!block) {
3796 /* just a "sub foo;" when &foo is already defined */
3280af22 3797 SAVEFREESV(PL_compcv);
aa689395 3798 goto done;
3799 }
7bac28a0 3800 /* ahem, death to those who redefine active sort subs */
3280af22 3801 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
7bac28a0 3802 croak("Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3803 if(const_sv = cv_const_sv(cv))
3804 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 3805 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
3806 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3807 && HvNAME(GvSTASH(CvGV(cv)))
3808 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3809 "autouse"))) {
3280af22
NIS		 3810 line_t oldline = PL_curcop->cop_line;
3811 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3812 warner(WARN_REDEFINE,
3813 const_sv ? "Constant subroutine %s redefined"
3814 : "Subroutine %s redefined", name);
3280af22 3815 PL_curcop->cop_line = oldline;
79072805 3816 }
8990e307 3817 SvREFCNT_dec(cv);
68dc0745 3818 cv = Nullcv;
79072805
LW		 3819 }
3820 }
a0d0e21e 3821 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3822 cv_undef(cv);
3280af22
NIS		 3823 CvFLAGS(cv) = CvFLAGS(PL_compcv);
3824 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
3825 CvOUTSIDE(PL_compcv) = 0;
3826 CvPADLIST(cv) = CvPADLIST(PL_compcv);
3827 CvPADLIST(PL_compcv) = 0;
3828 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
3829 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
3830 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 3831 }
3832 else {
3280af22 3833 cv = PL_compcv;
44a8e56a 3834 if (name) {
3835 GvCV(gv) = cv;
3836 GvCVGEN(gv) = 0;
3280af22 3837 PL_sub_generation++;
44a8e56a 3838 }
a0d0e21e 3839 }
44a8e56a 3840 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 3841 CvFILEGV(cv) = PL_curcop->cop_filegv;
3842 CvSTASH(cv) = PL_curstash;
11343788
MB		 3843#ifdef USE_THREADS
3844 CvOWNER(cv) = 0;
1cfa4ec7 3845 if (!CvMUTEXP(cv)) {
f6aaf501 3846 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 3847 MUTEX_INIT(CvMUTEXP(cv));
3848 }
11343788 3849#endif /* USE_THREADS */
8990e307 3850
3fe9a6f1 3851 if (ps)
3852 sv_setpv((SV*)cv, ps);
4633a7c4 3853
3280af22 3854 if (PL_error_count) {
c07a80fd 3855 op_free(block);
3856 block = Nullop;
68dc0745 3857 if (name) {
3858 char *s = strrchr(name, ':');
3859 s = s ? s+1 : name;
6d4c2119
CS		 3860 if (strEQ(s, "BEGIN")) {
3861 char *not_safe =
3862 "BEGIN not safe after errors--compilation aborted";
3280af22 3863 if (PL_in_eval & 4)
6d4c2119
CS		 3864 croak(not_safe);
3865 else {
3866 /* force display of errors found but not reported */
38a03e6e 3867 sv_catpv(ERRSV, not_safe);
3280af22 3868 croak("%s", SvPVx(ERRSV, PL_na));
6d4c2119
CS		 3869 }
3870 }
68dc0745 3871 }
c07a80fd 3872 }
a0d0e21e 3873 if (!block) {
55d729e4 3874 noblock:
3280af22 3875 PL_copline = NOLINE;
a0d0e21e
LW		 3876 LEAVE_SCOPE(floor);
3877 return cv;
3878 }
3879
3280af22
NIS		 3880 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
3881 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 3882
54310121 3883 if (CvCLONE(cv)) {
3280af22
NIS		 3884 SV **namep = AvARRAY(PL_comppad_name);
3885 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 3886 SV *namesv;
3887
3280af22 3888 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3889 continue;
3890 /*
3891 * The only things that a clonable function needs in its
3892 * pad are references to outer lexicals and anonymous subs.
3893 * The rest are created anew during cloning.
3894 */
3895 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 3896 namesv != &PL_sv_undef &&
54310121 3897 (SvFAKE(namesv) ||
3898 *SvPVX(namesv) == '&')))
3899 {
3280af22
NIS		 3900 SvREFCNT_dec(PL_curpad[ix]);
3901 PL_curpad[ix] = Nullsv;
54310121 3902 }
3903 }
a0d0e21e 3904 }
54310121 3905 else {
3906 AV *av = newAV(); /* Will be @_ */
3907 av_extend(av, 0);
3280af22 3908 av_store(PL_comppad, 0, (SV*)av);
54310121 3909 AvFLAGS(av) = AVf_REIFY;
79072805 3910
3280af22
NIS		 3911 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
3912 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3913 continue;
3280af22
NIS		 3914 if (!SvPADMY(PL_curpad[ix]))
3915 SvPADTMP_on(PL_curpad[ix]);
54310121 3916 }
3917 }
79072805 3918
a0d0e21e 3919 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3920 CvSTART(cv) = LINKLIST(CvROOT(cv));
3921 CvROOT(cv)->op_next = 0;
3922 peep(CvSTART(cv));
93a17b20 3923
44a8e56a 3924 if (name) {
3925 char *s;
3926
3280af22 3927 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 3928 SV *sv = NEWSV(0,0);
44a8e56a 3929 SV *tmpstr = sv_newmortal();
549bb64a 3930 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3931 CV *cv;
3932 HV *hv;
3933
51790459 3934 sv_setpvf(sv, "%_:%ld-%ld",
3280af22
NIS		 3935 GvSV(PL_curcop->cop_filegv),
3936 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 3937 gv_efullname3(tmpstr, gv, Nullch);
3280af22 3938 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3939 hv = GvHVn(db_postponed);
9607fc9c 3940 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3941 && (cv = GvCV(db_postponed))) {
44a8e56a 3942 dSP;
924508f0 3943 PUSHMARK(SP);
44a8e56a 3944 XPUSHs(tmpstr);
3945 PUTBACK;
3946 perl_call_sv((SV*)cv, G_DISCARD);
3947 }
3948 }
79072805 3949
44a8e56a 3950 if ((s = strrchr(name,':')))
28757baa 3951 s++;
3952 else
3953 s = name;
68dc0745 3954 if (strEQ(s, "BEGIN")) {
3280af22 3955 I32 oldscope = PL_scopestack_ix;
28757baa 3956 ENTER;
3280af22
NIS		 3957 SAVESPTR(PL_compiling.cop_filegv);
3958 SAVEI16(PL_compiling.cop_line);
3959 save_svref(&PL_rs);
3960 sv_setsv(PL_rs, PL_nrs);
28757baa 3961
3280af22
NIS		 3962 if (!PL_beginav)
3963 PL_beginav = newAV();
28757baa 3964 DEBUG_x( dump_sub(gv) );
3280af22 3965 av_push(PL_beginav, (SV *)cv);
28757baa 3966 GvCV(gv) = 0;
3280af22 3967 call_list(oldscope, PL_beginav);
a6006777 3968
3280af22 3969 PL_curcop = &PL_compiling;
a0ed51b3 3970 PL_compiling.op_private = PL_hints;
28757baa 3971 LEAVE;
3972 }
3280af22
NIS		 3973 else if (strEQ(s, "END") && !PL_error_count) {
3974 if (!PL_endav)
3975 PL_endav = newAV();
3976 av_unshift(PL_endav, 1);
3977 av_store(PL_endav, 0, (SV *)cv);
28757baa 3978 GvCV(gv) = 0;
3979 }
3280af22
NIS		 3980 else if (strEQ(s, "INIT") && !PL_error_count) {
3981 if (!PL_initav)
3982 PL_initav = newAV();
3983 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 3984 GvCV(gv) = 0;
ae77835f 3985 }
79072805 3986 }
a6006777 3987
aa689395 3988 done:
3280af22 3989 PL_copline = NOLINE;
8990e307 3990 LEAVE_SCOPE(floor);
a0d0e21e 3991 return cv;
79072805
LW		 3992}
3993
5476c433
JD		 3994void
3995newCONSTSUB(HV *stash, char *name, SV *sv)
3996{
3997 dTHR;
3280af22
NIS		 3998 U32 oldhints = PL_hints;
3999 HV *old_cop_stash = PL_curcop->cop_stash;
4000 HV *old_curstash = PL_curstash;
4001 line_t oldline = PL_curcop->cop_line;
4002 PL_curcop->cop_line = PL_copline;
5476c433 4003
3280af22 4004 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4005 if(stash)
3280af22 4006 PL_curstash = PL_curcop->cop_stash = stash;
5476c433
JD		 4007
4008 newSUB(
be24f278 4009 start_subparse(FALSE, 0),
5476c433 4010 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4011 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
5476c433
JD		 4012 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4013 );
4014
3280af22
NIS		 4015 PL_hints = oldhints;
4016 PL_curcop->cop_stash = old_cop_stash;
4017 PL_curstash = old_curstash;
4018 PL_curcop->cop_line = oldline;
5476c433
JD		 4019}
4020
57d3b86d 4021CV *
e3b8966e 4022newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename)
a0d0e21e 4023{
11343788 4024 dTHR;
44a8e56a 4025 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4026 register CV *cv;
44a8e56a 4027
4028 if (cv = (name ? GvCV(gv) : Nullcv)) {
4029 if (GvCVGEN(gv)) {
4030 /* just a cached method */
4031 SvREFCNT_dec(cv);
4032 cv = 0;
4033 }
4034 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4035 /* already defined (or promised) */
599cee73 4036 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4037 && HvNAME(GvSTASH(CvGV(cv)))
4038 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4039 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4040 if (PL_copline != NOLINE)
4041 PL_curcop->cop_line = PL_copline;
599cee73 4042 warner(WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4043 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4044 }
4045 SvREFCNT_dec(cv);
4046 cv = 0;
79072805 4047 }
79072805 4048 }
44a8e56a 4049
4050 if (cv) /* must reuse cv if autoloaded */
4051 cv_undef(cv);
a0d0e21e
LW		 4052 else {
4053 cv = (CV*)NEWSV(1105,0);
4054 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4055 if (name) {
4056 GvCV(gv) = cv;
4057 GvCVGEN(gv) = 0;
3280af22 4058 PL_sub_generation++;
44a8e56a 4059 }
a0d0e21e 4060 }
5196be3e 4061 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4062#ifdef USE_THREADS
12ca11f6 4063 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4064 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4065 CvOWNER(cv) = 0;
4066#endif /* USE_THREADS */
79072805 4067 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4068 CvXSUB(cv) = subaddr;
44a8e56a 4069
28757baa 4070 if (name) {
4071 char *s = strrchr(name,':');
4072 if (s)
4073 s++;
4074 else
4075 s = name;
4076 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4077 if (!PL_beginav)
4078 PL_beginav = newAV();
4079 av_push(PL_beginav, (SV *)cv);
44a8e56a 4080 GvCV(gv) = 0;
28757baa 4081 }
4082 else if (strEQ(s, "END")) {
3280af22
NIS		 4083 if (!PL_endav)
4084 PL_endav = newAV();
4085 av_unshift(PL_endav, 1);
4086 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4087 GvCV(gv) = 0;
28757baa 4088 }
7d07dbc2 4089 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4090 if (!PL_initav)
4091 PL_initav = newAV();
4092 av_push(PL_initav, (SV *)cv);
f8f842e4 4093 GvCV(gv) = 0;
ae77835f 4094 }
28757baa 4095 }
8990e307 4096 else
a5f75d66 4097 CvANON_on(cv);
44a8e56a 4098
a0d0e21e 4099 return cv;
79072805
LW		 4100}
4101
4102void
8ac85365 4103newFORM(I32 floor, OP *o, OP *block)
79072805 4104{
11343788 4105 dTHR;
79072805
LW		 4106 register CV *cv;
4107 char *name;
4108 GV *gv;
a0d0e21e 4109 I32 ix;
79072805 4110
11343788 4111 if (o)
3280af22 4112 name = SvPVx(cSVOPo->op_sv, PL_na);
79072805
LW		 4113 else
4114 name = "STDOUT";
85e6fe83 4115 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4116 GvMULTI_on(gv);
79072805 4117 if (cv = GvFORM(gv)) {
599cee73 4118 if (ckWARN(WARN_REDEFINE)) {
3280af22 4119 line_t oldline = PL_curcop->cop_line;
79072805 4120
3280af22 4121 PL_curcop->cop_line = PL_copline;
599cee73 4122 warner(WARN_REDEFINE, "Format %s redefined",name);
3280af22 4123 PL_curcop->cop_line = oldline;
79072805 4124 }
8990e307 4125 SvREFCNT_dec(cv);
79072805 4126 }
3280af22 4127 cv = PL_compcv;
79072805 4128 GvFORM(gv) = cv;
44a8e56a 4129 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4130 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4131
3280af22
NIS		 4132 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4133 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4134 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4135 }
4136
79072805
LW		 4137 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4138 CvSTART(cv) = LINKLIST(CvROOT(cv));
4139 CvROOT(cv)->op_next = 0;
4140 peep(CvSTART(cv));
11343788 4141 op_free(o);
3280af22 4142 PL_copline = NOLINE;
8990e307 4143 LEAVE_SCOPE(floor);
79072805
LW		 4144}
4145
4146OP *
8ac85365 4147newANONLIST(OP *o)
79072805 4148{
93a17b20 4149 return newUNOP(OP_REFGEN, 0,
11343788 4150 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4151}
4152
4153OP *
8ac85365 4154newANONHASH(OP *o)
79072805 4155{
93a17b20 4156 return newUNOP(OP_REFGEN, 0,
11343788 4157 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4158}
4159
4160OP *
8ac85365 4161newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 4162{
4163 return newUNOP(OP_REFGEN, 0,
4633a7c4 4164 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 4165}
4166
4167OP *
8ac85365 4168oopsAV(OP *o)
79072805 4169{
ed6116ce
LW		 4170 switch (o->op_type) {
4171 case OP_PADSV:
4172 o->op_type = OP_PADAV;
4173 o->op_ppaddr = ppaddr[OP_PADAV];
51e247a3 4174 return ref(o, OP_RV2AV);
ed6116ce
LW		 4175
4176 case OP_RV2SV:
79072805
LW		 4177 o->op_type = OP_RV2AV;
4178 o->op_ppaddr = ppaddr[OP_RV2AV];
4179 ref(o, OP_RV2AV);
ed6116ce
LW		 4180 break;
4181
4182 default:
79072805 4183 warn("oops: oopsAV");
ed6116ce
LW		 4184 break;
4185 }
79072805
LW		 4186 return o;
4187}
4188
4189OP *
8ac85365 4190oopsHV(OP *o)
79072805 4191{
ed6116ce
LW		 4192 switch (o->op_type) {
4193 case OP_PADSV:
4194 case OP_PADAV:
4195 o->op_type = OP_PADHV;
4196 o->op_ppaddr = ppaddr[OP_PADHV];
51e247a3 4197 return ref(o, OP_RV2HV);
ed6116ce
LW		 4198
4199 case OP_RV2SV:
4200 case OP_RV2AV:
79072805
LW		 4201 o->op_type = OP_RV2HV;
4202 o->op_ppaddr = ppaddr[OP_RV2HV];
4203 ref(o, OP_RV2HV);
ed6116ce
LW		 4204 break;
4205
4206 default:
79072805 4207 warn("oops: oopsHV");
ed6116ce
LW		 4208 break;
4209 }
79072805
LW		 4210 return o;
4211}
4212
4213OP *
8ac85365 4214newAVREF(OP *o)
79072805 4215{
ed6116ce
LW		 4216 if (o->op_type == OP_PADANY) {
4217 o->op_type = OP_PADAV;
4218 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 4219 return o;
ed6116ce 4220 }
79072805
LW		 4221 return newUNOP(OP_RV2AV, 0, scalar(o));
4222}
4223
4224OP *
8ac85365 4225newGVREF(I32 type, OP *o)
79072805 4226{
a0d0e21e
LW		 4227 if (type == OP_MAPSTART)
4228 return newUNOP(OP_NULL, 0, o);
748a9306 4229 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4230}
4231
4232OP *
8ac85365 4233newHVREF(OP *o)
79072805 4234{
ed6116ce
LW		 4235 if (o->op_type == OP_PADANY) {
4236 o->op_type = OP_PADHV;
4237 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 4238 return o;
ed6116ce 4239 }
79072805
LW		 4240 return newUNOP(OP_RV2HV, 0, scalar(o));
4241}
4242
4243OP *
8ac85365 4244oopsCV(OP *o)
79072805 4245{
463ee0b2 4246 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 4247 /* STUB */
4248 return o;
4249}
4250
4251OP *
8ac85365 4252newCVREF(I32 flags, OP *o)
79072805 4253{
c07a80fd 4254 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4255}
4256
4257OP *
8ac85365 4258newSVREF(OP *o)
79072805 4259{
ed6116ce
LW		 4260 if (o->op_type == OP_PADANY) {
4261 o->op_type = OP_PADSV;
4262 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 4263 return o;
ed6116ce 4264 }
224a4551
MB		 4265 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4266 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4267 return o;
224a4551 4268 }
79072805
LW		 4269 return newUNOP(OP_RV2SV, 0, scalar(o));
4270}
4271
4272/* Check routines. */
4273
4274OP *
8ac85365 4275ck_anoncode(OP *o)
5f05dabc 4276{
178c6305
CS		 4277 PADOFFSET ix;
4278 SV* name;
4279
4280 name = NEWSV(1106,0);
4281 sv_upgrade(name, SVt_PVNV);
4282 sv_setpvn(name, "&", 1);
4283 SvIVX(name) = -1;
4284 SvNVX(name) = 1;
5dc0d613 4285 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4286 av_store(PL_comppad_name, ix, name);
4287 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4288 SvPADMY_on(cSVOPo->op_sv);
4289 cSVOPo->op_sv = Nullsv;
4290 cSVOPo->op_targ = ix;
4291 return o;
5f05dabc 4292}
4293
4294OP *
8ac85365 4295ck_bitop(OP *o)
55497cff 4296{
3280af22 4297 o->op_private = PL_hints;
5dc0d613 4298 return o;
55497cff 4299}
4300
4301OP *
8ac85365 4302ck_concat(OP *o)
79072805 4303{
11343788
MB		 4304 if (cUNOPo->op_first->op_type == OP_CONCAT)
4305 o->op_flags |= OPf_STACKED;
4306 return o;
79072805
LW		 4307}
4308
4309OP *
8ac85365 4310ck_spair(OP *o)
79072805 4311{
11343788 4312 if (o->op_flags & OPf_KIDS) {
79072805 4313 OP* newop;
a0d0e21e 4314 OP* kid;
5dc0d613
MB		 4315 OPCODE type = o->op_type;
4316 o = modkids(ck_fun(o), type);
11343788 4317 kid = cUNOPo->op_first;
a0d0e21e
LW		 4318 newop = kUNOP->op_first->op_sibling;
4319 if (newop &&
4320 (newop->op_sibling ||
4321 !(opargs[newop->op_type] & OA_RETSCALAR) ||
4322 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4323 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4324
11343788 4325 return o;
a0d0e21e
LW		 4326 }
4327 op_free(kUNOP->op_first);
4328 kUNOP->op_first = newop;
4329 }
11343788
MB		 4330 o->op_ppaddr = ppaddr[++o->op_type];
4331 return ck_fun(o);
a0d0e21e
LW		 4332}
4333
4334OP *
8ac85365 4335ck_delete(OP *o)
a0d0e21e 4336{
11343788 4337 o = ck_fun(o);
5dc0d613 4338 o->op_private = 0;
11343788
MB		 4339 if (o->op_flags & OPf_KIDS) {
4340 OP *kid = cUNOPo->op_first;
5f05dabc 4341 if (kid->op_type == OP_HSLICE)
5dc0d613 4342 o->op_private |= OPpSLICE;
5f05dabc 4343 else if (kid->op_type != OP_HELEM)
4344 croak("%s argument is not a HASH element or slice",
5dc0d613 4345 op_desc[o->op_type]);
a0d0e21e 4346 null(kid);
79072805 4347 }
11343788 4348 return o;
79072805
LW		 4349}
4350
4351OP *
8ac85365 4352ck_eof(OP *o)
79072805 4353{
11343788 4354 I32 type = o->op_type;
79072805 4355
11343788
MB		 4356 if (o->op_flags & OPf_KIDS) {
4357 if (cLISTOPo->op_first->op_type == OP_STUB) {
4358 op_free(o);
4359 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4360 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4361 }
11343788 4362 return ck_fun(o);
79072805 4363 }
11343788 4364 return o;
79072805
LW		 4365}
4366
4367OP *
8ac85365 4368ck_eval(OP *o)
79072805 4369{
3280af22 4370 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4371 if (o->op_flags & OPf_KIDS) {
4372 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4373
93a17b20 4374 if (!kid) {
11343788
MB		 4375 o->op_flags &= ~OPf_KIDS;
4376 null(o);
79072805
LW		 4377 }
4378 else if (kid->op_type == OP_LINESEQ) {
4379 LOGOP *enter;
4380
11343788
MB		 4381 kid->op_next = o->op_next;
4382 cUNOPo->op_first = 0;
4383 op_free(o);
79072805
LW		 4384
4385 Newz(1101, enter, 1, LOGOP);
4386 enter->op_type = OP_ENTERTRY;
4387 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
4388 enter->op_private = 0;
4389
4390 /* establish postfix order */
4391 enter->op_next = (OP*)enter;
4392
11343788
MB		 4393 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4394 o->op_type = OP_LEAVETRY;
4395 o->op_ppaddr = ppaddr[OP_LEAVETRY];
4396 enter->op_other = o;
4397 return o;
79072805 4398 }
c7cc6f1c 4399 else
473986ff 4400 scalar((OP*)kid);
79072805
LW		 4401 }
4402 else {
11343788 4403 op_free(o);
54b9620d 4404 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4405 }
3280af22 4406 o->op_targ = (PADOFFSET)PL_hints;
11343788 4407 return o;
79072805
LW		 4408}
4409
4410OP *
8ac85365 4411ck_exec(OP *o)
79072805
LW		 4412{
4413 OP *kid;
11343788
MB		 4414 if (o->op_flags & OPf_STACKED) {
4415 o = ck_fun(o);
4416 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4417 if (kid->op_type == OP_RV2GV)
4418 null(kid);
79072805 4419 }
463ee0b2 4420 else
11343788
MB		 4421 o = listkids(o);
4422 return o;
79072805
LW		 4423}
4424
4425OP *
8ac85365 4426ck_exists(OP *o)
5f05dabc 4427{
5196be3e
MB		 4428 o = ck_fun(o);
4429 if (o->op_flags & OPf_KIDS) {
4430 OP *kid = cUNOPo->op_first;
5f05dabc 4431 if (kid->op_type != OP_HELEM)
5196be3e 4432 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 4433 null(kid);
4434 }
5196be3e 4435 return o;
5f05dabc 4436}
4437
4438OP *
8ac85365 4439ck_gvconst(register OP *o)
79072805
LW		 4440{
4441 o = fold_constants(o);
4442 if (o->op_type == OP_CONST)
4443 o->op_type = OP_GV;
4444 return o;
4445}
4446
4447OP *
8ac85365 4448ck_rvconst(register OP *o)
79072805 4449{
11343788
MB		 4450 dTHR;
4451 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4452
3280af22 4453 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4454 if (kid->op_type == OP_CONST) {
44a8e56a 4455 char *name;
4456 int iscv;
4457 GV *gv;
779c5bc9 4458 SV *kidsv = kid->op_sv;
44a8e56a 4459
779c5bc9
GS		 4460 /* Is it a constant from cv_const_sv()? */
4461 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4462 SV *rsv = SvRV(kidsv);
4463 int svtype = SvTYPE(rsv);
4464 char *badtype = Nullch;
4465
4466 switch (o->op_type) {
4467 case OP_RV2SV:
4468 if (svtype > SVt_PVMG)
4469 badtype = "a SCALAR";
4470 break;
4471 case OP_RV2AV:
4472 if (svtype != SVt_PVAV)
4473 badtype = "an ARRAY";
4474 break;
4475 case OP_RV2HV:
4476 if (svtype != SVt_PVHV) {
4477 if (svtype == SVt_PVAV) { /* pseudohash? */
4478 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4479 if (ksv && SvROK(*ksv)
4480 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4481 {
4482 break;
4483 }
4484 }
4485 badtype = "a HASH";
4486 }
4487 break;
4488 case OP_RV2CV:
4489 if (svtype != SVt_PVCV)
4490 badtype = "a CODE";
4491 break;
4492 }
4493 if (badtype)
4494 croak("Constant is not %s reference", badtype);
4495 return o;
4496 }
4497 name = SvPV(kidsv, PL_na);
3280af22 4498 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4499 char *badthing = Nullch;
5dc0d613 4500 switch (o->op_type) {
44a8e56a 4501 case OP_RV2SV:
4502 badthing = "a SCALAR";
4503 break;
4504 case OP_RV2AV:
4505 badthing = "an ARRAY";
4506 break;
4507 case OP_RV2HV:
4508 badthing = "a HASH";
4509 break;
4510 }
4511 if (badthing)
4512 croak(
4513 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4514 name, badthing);
4515 }
93233ece
CS		 4516 /*
4517 * This is a little tricky. We only want to add the symbol if we
4518 * didn't add it in the lexer. Otherwise we get duplicate strict
4519 * warnings. But if we didn't add it in the lexer, we must at
4520 * least pretend like we wanted to add it even if it existed before,
4521 * or we get possible typo warnings. OPpCONST_ENTERED says
4522 * whether the lexer already added THIS instance of this symbol.
4523 */
5196be3e 4524 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4525 do {
44a8e56a 4526 gv = gv_fetchpv(name,
748a9306 4527 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4528 iscv
4529 ? SVt_PVCV
11343788 4530 : o->op_type == OP_RV2SV
a0d0e21e 4531 ? SVt_PV
11343788 4532 : o->op_type == OP_RV2AV
a0d0e21e 4533 ? SVt_PVAV
11343788 4534 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4535 ? SVt_PVHV
4536 : SVt_PVGV);
93233ece
CS		 4537 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4538 if (gv) {
4539 kid->op_type = OP_GV;
4540 SvREFCNT_dec(kid->op_sv);
4541 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4542 }
79072805 4543 }
11343788 4544 return o;
79072805
LW		 4545}
4546
4547OP *
8ac85365 4548ck_ftst(OP *o)
79072805 4549{
11343788
MB		 4550 dTHR;
4551 I32 type = o->op_type;
79072805 4552
11343788
MB		 4553 if (o->op_flags & OPf_REF)
4554 return o;
79072805 4555
108ed793 4556 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4557 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4558
4559 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4560 OP *newop = newGVOP(type, OPf_REF,
3280af22 4561 gv_fetchpv(SvPVx(kid->op_sv, PL_na), TRUE, SVt_PVIO));
11343788 4562 op_free(o);
79072805
LW		 4563 return newop;
4564 }
4565 }
4566 else {
11343788 4567 op_free(o);
79072805 4568 if (type == OP_FTTTY)
fb73857a 4569 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4570 SVt_PVIO));
79072805 4571 else
54b9620d 4572 return newUNOP(type, 0, newDEFSVOP());
79072805 4573 }
11343788 4574 return o;
79072805
LW		 4575}
4576
4577OP *
8ac85365 4578ck_fun(OP *o)
79072805 4579{
11343788 4580 dTHR;
79072805
LW		 4581 register OP *kid;
4582 OP **tokid;
4583 OP *sibl;
4584 I32 numargs = 0;
11343788 4585 int type = o->op_type;
a0d0e21e 4586 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4587
11343788 4588 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4589 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4590 oa &= ~OA_OPTIONAL;
4591 else
11343788 4592 return no_fh_allowed(o);
79072805
LW		 4593 }
4594
11343788
MB		 4595 if (o->op_flags & OPf_KIDS) {
4596 tokid = &cLISTOPo->op_first;
4597 kid = cLISTOPo->op_first;
8990e307
LW		 4598 if (kid->op_type == OP_PUSHMARK ||
4599 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4600 {
79072805
LW		 4601 tokid = &kid->op_sibling;
4602 kid = kid->op_sibling;
4603 }
a0d0e21e 4604 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4605 *tokid = kid = newDEFSVOP();
79072805
LW		 4606
4607 while (oa && kid) {
4608 numargs++;
4609 sibl = kid->op_sibling;
4610 switch (oa & 7) {
4611 case OA_SCALAR:
4612 scalar(kid);
4613 break;
4614 case OA_LIST:
4615 if (oa < 16) {
4616 kid = 0;
4617 continue;
4618 }
4619 else
4620 list(kid);
4621 break;
4622 case OA_AVREF:
4623 if (kid->op_type == OP_CONST &&
4624 (kid->op_private & OPpCONST_BARE)) {
3280af22 4625 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4626 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4627 gv_fetchpv(name, TRUE, SVt_PVAV) ));
599cee73
PM		 4628 if (ckWARN(WARN_SYNTAX))
4629 warner(WARN_SYNTAX,
4630 "Array @%s missing the @ in argument %ld of %s()",
ff0cee69 4631 name, (long)numargs, op_desc[type]);
79072805
LW		 4632 op_free(kid);
4633 kid = newop;
4634 kid->op_sibling = sibl;
4635 *tokid = kid;
4636 }
8990e307 4637 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4638 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4639 mod(kid, type);
79072805
LW		 4640 break;
4641 case OA_HVREF:
4642 if (kid->op_type == OP_CONST &&
4643 (kid->op_private & OPpCONST_BARE)) {
3280af22 4644 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4645 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4646 gv_fetchpv(name, TRUE, SVt_PVHV) ));
599cee73
PM		 4647 if (ckWARN(WARN_SYNTAX))
4648 warner(WARN_SYNTAX,
4649 "Hash %%%s missing the %% in argument %ld of %s()",
ff0cee69 4650 name, (long)numargs, op_desc[type]);
79072805
LW		 4651 op_free(kid);
4652 kid = newop;
4653 kid->op_sibling = sibl;
4654 *tokid = kid;
4655 }
8990e307 4656 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4657 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4658 mod(kid, type);
79072805
LW		 4659 break;
4660 case OA_CVREF:
4661 {
a0d0e21e 4662 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4663 kid->op_sibling = 0;
4664 linklist(kid);
4665 newop->op_next = newop;
4666 kid = newop;
4667 kid->op_sibling = sibl;
4668 *tokid = kid;
4669 }
4670 break;
4671 case OA_FILEREF:
c340be78 4672 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805
LW		 4673 if (kid->op_type == OP_CONST &&
4674 (kid->op_private & OPpCONST_BARE)) {
4675 OP *newop = newGVOP(OP_GV, 0,
3280af22 4676 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, PL_na), TRUE,
85e6fe83 4677 SVt_PVIO) );
79072805
LW		 4678 op_free(kid);
4679 kid = newop;
4680 }
4681 else {
4682 kid->op_sibling = 0;
4683 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4684 }
4685 kid->op_sibling = sibl;
4686 *tokid = kid;
4687 }
4688 scalar(kid);
4689 break;
4690 case OA_SCALARREF:
a0d0e21e 4691 mod(scalar(kid), type);
79072805
LW		 4692 break;
4693 }
4694 oa >>= 4;
4695 tokid = &kid->op_sibling;
4696 kid = kid->op_sibling;
4697 }
11343788 4698 o->op_private |= numargs;
79072805 4699 if (kid)
11343788
MB		 4700 return too_many_arguments(o,op_desc[o->op_type]);
4701 listkids(o);
79072805 4702 }
a0d0e21e 4703 else if (opargs[type] & OA_DEFGV) {
11343788 4704 op_free(o);
54b9620d 4705 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4706 }
4707
79072805
LW		 4708 if (oa) {
4709 while (oa & OA_OPTIONAL)
4710 oa >>= 4;
4711 if (oa && oa != OA_LIST)
11343788 4712 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4713 }
11343788 4714 return o;
79072805
LW		 4715}
4716
4717OP *
8ac85365 4718ck_glob(OP *o)
79072805 4719{
fb73857a 4720 GV *gv;
4721
1f2bfc8a 4722 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4723 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4724
4725 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4726 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4727
4728 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4729 static int glob_index;
4730
5196be3e 4731 append_elem(OP_GLOB, o,
46fc3d4c 4732 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4733 o->op_type = OP_LIST;
4734 o->op_ppaddr = ppaddr[OP_LIST];
4735 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4736 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4737 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4738 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4739 scalar(newUNOP(OP_RV2CV, 0,
4740 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4741 o = newUNOP(OP_NULL, 0, ck_subr(o));
4742 o->op_targ = OP_GLOB; /* hint at what it used to be */
4743 return o;
b1cb66bf 4744 }
4745 gv = newGVgen("main");
a0d0e21e 4746 gv_IOadd(gv);
11343788
MB		 4747 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4748 scalarkids(o);
4749 return ck_fun(o);
79072805
LW		 4750}
4751
4752OP *
8ac85365 4753ck_grep(OP *o)
79072805
LW		 4754{
4755 LOGOP *gwop;
4756 OP *kid;
11343788 4757 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4758
11343788 4759 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4760 Newz(1101, gwop, 1, LOGOP);
aeea060c 4761
11343788 4762 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4763 OP* k;
11343788
MB		 4764 o = ck_sort(o);
4765 kid = cLISTOPo->op_first->op_sibling;
4766 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4767 kid = k;
4768 }
4769 kid->op_next = (OP*)gwop;
11343788 4770 o->op_flags &= ~OPf_STACKED;
93a17b20 4771 }
11343788 4772 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4773 if (type == OP_MAPWHILE)
4774 list(kid);
4775 else
4776 scalar(kid);
11343788 4777 o = ck_fun(o);
3280af22 4778 if (PL_error_count)
11343788 4779 return o;
aeea060c 4780 kid = cLISTOPo->op_first->op_sibling;
79072805 4781 if (kid->op_type != OP_NULL)
463ee0b2 4782 croak("panic: ck_grep");
79072805
LW		 4783 kid = kUNOP->op_first;
4784
a0d0e21e
LW		 4785 gwop->op_type = type;
4786 gwop->op_ppaddr = ppaddr[type];
11343788 4787 gwop->op_first = listkids(o);
79072805
LW		 4788 gwop->op_flags |= OPf_KIDS;
4789 gwop->op_private = 1;
4790 gwop->op_other = LINKLIST(kid);
a0d0e21e 4791 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4792 kid->op_next = (OP*)gwop;
4793
11343788 4794 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4795 if (!kid || !kid->op_sibling)
11343788 4796 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4797 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4798 mod(kid, OP_GREPSTART);
4799
79072805
LW		 4800 return (OP*)gwop;
4801}
4802
4803OP *
8ac85365 4804ck_index(OP *o)
79072805 4805{
11343788
MB		 4806 if (o->op_flags & OPf_KIDS) {
4807 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 4808 if (kid)
4809 kid = kid->op_sibling; /* get past "big" */
79072805 4810 if (kid && kid->op_type == OP_CONST)
2779dcf1 4811 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4812 }
11343788 4813 return ck_fun(o);
79072805
LW		 4814}
4815
4816OP *
8ac85365 4817ck_lengthconst(OP *o)
79072805
LW		 4818{
4819 /* XXX length optimization goes here */
11343788 4820 return ck_fun(o);
79072805
LW		 4821}
4822
4823OP *
8ac85365 4824ck_lfun(OP *o)
79072805 4825{
5dc0d613
MB		 4826 OPCODE type = o->op_type;
4827 return modkids(ck_fun(o), type);
79072805
LW		 4828}
4829
4830OP *
8ac85365 4831ck_rfun(OP *o)
8990e307 4832{
5dc0d613
MB		 4833 OPCODE type = o->op_type;
4834 return refkids(ck_fun(o), type);
8990e307
LW		 4835}
4836
4837OP *
8ac85365 4838ck_listiob(OP *o)
79072805
LW		 4839{
4840 register OP *kid;
aeea060c 4841
11343788 4842 kid = cLISTOPo->op_first;
79072805 4843 if (!kid) {
11343788
MB		 4844 o = force_list(o);
4845 kid = cLISTOPo->op_first;
79072805
LW		 4846 }
4847 if (kid->op_type == OP_PUSHMARK)
4848 kid = kid->op_sibling;
11343788 4849 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4850 kid = kid->op_sibling;
4851 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4852 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4853 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4854 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4855 cLISTOPo->op_first->op_sibling = kid;
4856 cLISTOPo->op_last = kid;
79072805
LW		 4857 kid = kid->op_sibling;
4858 }
4859 }
4860
4861 if (!kid)
54b9620d 4862 append_elem(o->op_type, o, newDEFSVOP());
79072805 4863
5dc0d613 4864 o = listkids(o);
bbce6d69 4865
5dc0d613 4866 o->op_private = 0;
36477c24 4867#ifdef USE_LOCALE
3280af22 4868 if (PL_hints & HINT_LOCALE)
5dc0d613 4869 o->op_private |= OPpLOCALE;
bbce6d69 4870#endif
4871
5dc0d613 4872 return o;
bbce6d69 4873}
4874
4875OP *
8ac85365 4876ck_fun_locale(OP *o)
bbce6d69 4877{
5dc0d613 4878 o = ck_fun(o);
bbce6d69 4879
5dc0d613 4880 o->op_private = 0;
36477c24 4881#ifdef USE_LOCALE
3280af22 4882 if (PL_hints & HINT_LOCALE)
5dc0d613 4883 o->op_private |= OPpLOCALE;
bbce6d69 4884#endif
4885
5dc0d613 4886 return o;
bbce6d69 4887}
4888
4889OP *
8ac85365 4890ck_scmp(OP *o)
bbce6d69 4891{
5dc0d613 4892 o->op_private = 0;
36477c24 4893#ifdef USE_LOCALE
3280af22 4894 if (PL_hints & HINT_LOCALE)
5dc0d613 4895 o->op_private |= OPpLOCALE;
bbce6d69 4896#endif
36477c24 4897
5dc0d613 4898 return o;
79072805
LW		 4899}
4900
4901OP *
8ac85365 4902ck_match(OP *o)
79072805 4903{
5dc0d613 4904 o->op_private |= OPpRUNTIME;
11343788 4905 return o;
79072805
LW		 4906}
4907
4908OP *
8ac85365 4909ck_null(OP *o)
79072805 4910{
11343788 4911 return o;
79072805
LW		 4912}
4913
4914OP *
8ac85365 4915ck_repeat(OP *o)
79072805 4916{
11343788
MB		 4917 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4918 o->op_private |= OPpREPEAT_DOLIST;
4919 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4920 }
4921 else
11343788
MB		 4922 scalar(o);
4923 return o;
79072805
LW		 4924}
4925
4926OP *
8ac85365 4927ck_require(OP *o)
8990e307 4928{
11343788
MB		 4929 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4930 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4931
4932 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4933 char *s;
a0d0e21e
LW		 4934 for (s = SvPVX(kid->op_sv); *s; s++) {
4935 if (*s == ':' && s[1] == ':') {
4936 *s = '/';
1aef975c 4937 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4938 --SvCUR(kid->op_sv);
4939 }
8990e307 4940 }
a0d0e21e 4941 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4942 }
4943 }
11343788 4944 return ck_fun(o);
8990e307
LW		 4945}
4946
4947OP *
8ac85365 4948ck_retarget(OP *o)
79072805 4949{
463ee0b2 4950 croak("NOT IMPL LINE %d",__LINE__);
79072805 4951 /* STUB */
11343788 4952 return o;
79072805
LW		 4953}
4954
4955OP *
8ac85365 4956ck_select(OP *o)
79072805 4957{
c07a80fd 4958 OP* kid;
11343788
MB		 4959 if (o->op_flags & OPf_KIDS) {
4960 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4961 if (kid && kid->op_sibling) {
11343788
MB		 4962 o->op_type = OP_SSELECT;
4963 o->op_ppaddr = ppaddr[OP_SSELECT];
4964 o = ck_fun(o);
4965 return fold_constants(o);
79072805
LW		 4966 }
4967 }
11343788
MB		 4968 o = ck_fun(o);
4969 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4970 if (kid && kid->op_type == OP_RV2GV)
4971 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4972 return o;
79072805
LW		 4973}
4974
4975OP *
8ac85365 4976ck_shift(OP *o)
79072805 4977{
11343788 4978 I32 type = o->op_type;
79072805 4979
11343788 4980 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4981 OP *argop;
4982
11343788 4983 op_free(o);
6d4ff0d2 4984#ifdef USE_THREADS
533c011a 4985 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 4986 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 4987 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 4988 }
4989 else {
4990 argop = newUNOP(OP_RV2AV, 0,
4991 scalar(newGVOP(OP_GV, 0,
4992 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4993 }
4994#else
4995 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 4996 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
4997 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 4998#endif /* USE_THREADS */
4999 return newUNOP(type, 0, scalar(argop));
79072805 5000 }
11343788 5001 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5002}
5003
5004OP *
8ac85365 5005ck_sort(OP *o)
79072805 5006{
5dc0d613 5007 o->op_private = 0;
36477c24 5008#ifdef USE_LOCALE
3280af22 5009 if (PL_hints & HINT_LOCALE)
5dc0d613 5010 o->op_private |= OPpLOCALE;
bbce6d69 5011#endif
5012
11343788
MB		 5013 if (o->op_flags & OPf_STACKED) {
5014 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 5015 OP *k;
5016 kid = kUNOP->op_first; /* get past rv2gv */
79072805 5017
463ee0b2 5018 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5019 linklist(kid);
463ee0b2
LW		 5020 if (kid->op_type == OP_SCOPE) {
5021 k = kid->op_next;
5022 kid->op_next = 0;
79072805 5023 }
463ee0b2 5024 else if (kid->op_type == OP_LEAVE) {
11343788 5025 if (o->op_type == OP_SORT) {
748a9306
LW		 5026 null(kid); /* wipe out leave */
5027 kid->op_next = kid;
463ee0b2 5028
748a9306
LW		 5029 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5030 if (k->op_next == kid)
5031 k->op_next = 0;
5032 }
463ee0b2 5033 }
748a9306
LW		 5034 else
5035 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5036 k = kLISTOP->op_first;
463ee0b2 5037 }
a0d0e21e
LW		 5038 peep(k);
5039
11343788 5040 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 5041 null(kid); /* wipe out rv2gv */
11343788 5042 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5043 kid->op_next = kid;
5044 else
5045 kid->op_next = k;
11343788 5046 o->op_flags |= OPf_SPECIAL;
79072805
LW		 5047 }
5048 }
bbce6d69 5049
11343788 5050 return o;
79072805
LW		 5051}
5052
5053OP *
8ac85365 5054ck_split(OP *o)
79072805
LW		 5055{
5056 register OP *kid;
aeea060c 5057
11343788
MB		 5058 if (o->op_flags & OPf_STACKED)
5059 return no_fh_allowed(o);
79072805 5060
11343788 5061 kid = cLISTOPo->op_first;
8990e307 5062 if (kid->op_type != OP_NULL)
463ee0b2 5063 croak("panic: ck_split");
8990e307 5064 kid = kid->op_sibling;
11343788
MB		 5065 op_free(cLISTOPo->op_first);
5066 cLISTOPo->op_first = kid;
85e6fe83 5067 if (!kid) {
11343788
MB		 5068 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
5069 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5070 }
79072805
LW		 5071
5072 if (kid->op_type != OP_MATCH) {
5073 OP *sibl = kid->op_sibling;
463ee0b2 5074 kid->op_sibling = 0;
79072805 5075 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5076 if (cLISTOPo->op_first == cLISTOPo->op_last)
5077 cLISTOPo->op_last = kid;
5078 cLISTOPo->op_first = kid;
79072805
LW		 5079 kid->op_sibling = sibl;
5080 }
5081
5082 kid->op_type = OP_PUSHRE;
5083 kid->op_ppaddr = ppaddr[OP_PUSHRE];
5084 scalar(kid);
5085
5086 if (!kid->op_sibling)
54b9620d 5087 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5088
5089 kid = kid->op_sibling;
5090 scalar(kid);
5091
5092 if (!kid->op_sibling)
11343788 5093 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5094
5095 kid = kid->op_sibling;
5096 scalar(kid);
5097
5098 if (kid->op_sibling)
11343788 5099 return too_many_arguments(o,op_desc[o->op_type]);
79072805 5100
11343788 5101 return o;
79072805
LW		 5102}
5103
5104OP *
8ac85365 5105ck_subr(OP *o)
79072805 5106{
11343788
MB		 5107 dTHR;
5108 OP *prev = ((cUNOPo->op_first->op_sibling)
5109 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5110 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5111 OP *cvop;
5112 char *proto = 0;
5113 CV *cv = 0;
46fc3d4c 5114 GV *namegv = 0;
4633a7c4
LW		 5115 int optional = 0;
5116 I32 arg = 0;
5117
11343788 5118 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5119 if (cvop->op_type == OP_RV2CV) {
5120 SVOP* tmpop;
11343788 5121 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5122 null(cvop); /* disable rv2cv */
5123 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
5124 if (tmpop->op_type == OP_GV) {
8ebc5c01 5125 cv = GvCVu(tmpop->op_sv);
5dc0d613 5126 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 5127 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
3280af22 5128 proto = SvPV((SV*)cv, PL_na);
46fc3d4c 5129 }
4633a7c4
LW		 5130 }
5131 }
3280af22
NIS		 5132 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5133 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5134 o->op_private |= OPpENTERSUB_DB;
5135 while (o2 != cvop) {
4633a7c4
LW		 5136 if (proto) {
5137 switch (*proto) {
5138 case '\0':
5dc0d613 5139 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5140 case ';':
5141 optional = 1;
5142 proto++;
5143 continue;
5144 case '$':
5145 proto++;
5146 arg++;
11343788 5147 scalar(o2);
4633a7c4
LW		 5148 break;
5149 case '%':
5150 case '@':
11343788 5151 list(o2);
4633a7c4
LW		 5152 arg++;
5153 break;
5154 case '&':
5155 proto++;
5156 arg++;
11343788 5157 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5158 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5159 break;
5160 case '*':
5161 proto++;
5162 arg++;
11343788 5163 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 5164 goto wrapref;
5165 {
11343788 5166 OP* kid = o2;
69dcf70c 5167 OP* sib = kid->op_sibling;
4633a7c4 5168 kid->op_sibling = 0;
69dcf70c
MB		 5169 o2 = newUNOP(OP_RV2GV, 0, kid);
5170 o2->op_sibling = sib;
6fa846a0 5171 prev->op_sibling = o2;
4633a7c4
LW		 5172 }
5173 goto wrapref;
5174 case '\\':
5175 proto++;
5176 arg++;
5177 switch (*proto++) {
5178 case '*':
11343788 5179 if (o2->op_type != OP_RV2GV)
5dc0d613 5180 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5181 goto wrapref;
5182 case '&':
11343788 5183 if (o2->op_type != OP_RV2CV)
5dc0d613 5184 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5185 goto wrapref;
5186 case '$':
386acf99
GS		 5187 if (o2->op_type != OP_RV2SV
5188 && o2->op_type != OP_PADSV
5189 && o2->op_type != OP_THREADSV)
5190 {
5dc0d613 5191 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5192 }
4633a7c4
LW		 5193 goto wrapref;
5194 case '@':
11343788 5195 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5196 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5197 goto wrapref;
5198 case '%':
11343788 5199 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5200 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5201 wrapref:
5202 {
11343788 5203 OP* kid = o2;
6fa846a0 5204 OP* sib = kid->op_sibling;
4633a7c4 5205 kid->op_sibling = 0;
6fa846a0
GS		 5206 o2 = newUNOP(OP_REFGEN, 0, kid);
5207 o2->op_sibling = sib;
e858de61 5208 prev->op_sibling = o2;
4633a7c4
LW		 5209 }
5210 break;
5211 default: goto oops;
5212 }
5213 break;
b1cb66bf 5214 case ' ':
5215 proto++;
5216 continue;
4633a7c4
LW		 5217 default:
5218 oops:
5219 croak("Malformed prototype for %s: %s",
3280af22 5220 gv_ename(namegv), SvPV((SV*)cv, PL_na));
4633a7c4
LW		 5221 }
5222 }
5223 else
11343788
MB		 5224 list(o2);
5225 mod(o2, OP_ENTERSUB);
5226 prev = o2;
5227 o2 = o2->op_sibling;
4633a7c4 5228 }
fb73857a 5229 if (proto && !optional &&
5230 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5231 return too_few_arguments(o, gv_ename(namegv));
11343788 5232 return o;
79072805
LW		 5233}
5234
5235OP *
8ac85365 5236ck_svconst(OP *o)
8990e307 5237{
11343788
MB		 5238 SvREADONLY_on(cSVOPo->op_sv);
5239 return o;
8990e307
LW		 5240}
5241
5242OP *
8ac85365 5243ck_trunc(OP *o)
79072805 5244{
11343788
MB		 5245 if (o->op_flags & OPf_KIDS) {
5246 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5247
a0d0e21e
LW		 5248 if (kid->op_type == OP_NULL)
5249 kid = (SVOP*)kid->op_sibling;
5250 if (kid &&
5251 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 5252 o->op_flags |= OPf_SPECIAL;
79072805 5253 }
11343788 5254 return ck_fun(o);
79072805
LW		 5255}
5256
463ee0b2
LW		 5257/* A peephole optimizer. We visit the ops in the order they're to execute. */
5258
79072805 5259void
8ac85365 5260peep(register OP *o)
79072805 5261{
11343788 5262 dTHR;
79072805 5263 register OP* oldop = 0;
a0d0e21e 5264 if (!o || o->op_seq)
79072805 5265 return;
a0d0e21e 5266 ENTER;
462e5cf6 5267 SAVEOP();
3280af22 5268 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5269 for (; o; o = o->op_next) {
5270 if (o->op_seq)
5271 break;
3280af22
NIS		 5272 if (!PL_op_seqmax)
5273 PL_op_seqmax++;
533c011a 5274 PL_op = o;
a0d0e21e
LW		 5275 switch (o->op_type) {
5276 case OP_NEXTSTATE:
5277 case OP_DBSTATE:
3280af22
NIS		 5278 PL_curcop = ((COP*)o); /* for warnings */
5279 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5280 break;
5281
5282 case OP_CONCAT:
5283 case OP_CONST:
5284 case OP_JOIN:
5285 case OP_UC:
5286 case OP_UCFIRST:
5287 case OP_LC:
5288 case OP_LCFIRST:
5289 case OP_QUOTEMETA:
3c4f770c 5290 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 5291 null(o->op_next);
3280af22 5292 o->op_seq = PL_op_seqmax++;
a0d0e21e 5293 break;
8990e307 5294 case OP_STUB:
54310121 5295 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5296 o->op_seq = PL_op_seqmax++;
54310121 5297 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5298 }
748a9306 5299 goto nothin;
79072805 5300 case OP_NULL:
748a9306 5301 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 5302 PL_curcop = ((COP*)o);
748a9306 5303 goto nothin;
79072805 5304 case OP_SCALAR:
93a17b20 5305 case OP_LINESEQ:
463ee0b2 5306 case OP_SCOPE:
748a9306 5307 nothin:
a0d0e21e
LW		 5308 if (oldop && o->op_next) {
5309 oldop->op_next = o->op_next;
79072805
LW		 5310 continue;
5311 }
3280af22 5312 o->op_seq = PL_op_seqmax++;
79072805
LW		 5313 break;
5314
5315 case OP_GV:
a0d0e21e 5316 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5317 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5318 null(o->op_next);
5319 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5320 o->op_next = o->op_next->op_next;
5321 o->op_type = OP_GVSV;
5322 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 5323 }
5324 }
a0d0e21e
LW		 5325 else if (o->op_next->op_type == OP_RV2AV) {
5326 OP* pop = o->op_next->op_next;
5327 IV i;
8990e307 5328 if (pop->op_type == OP_CONST &&
533c011a 5329 (PL_op = pop->op_next) &&
8990e307 5330 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5331 !(pop->op_next->op_private &
68dc0745 5332 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5333 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5334 <= 255 &&
8990e307
LW		 5335 i >= 0)
5336 {
748a9306 5337 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 5338 null(o->op_next);
8990e307
LW		 5339 null(pop->op_next);
5340 null(pop);
a0d0e21e
LW		 5341 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5342 o->op_next = pop->op_next->op_next;
5343 o->op_type = OP_AELEMFAST;
5344 o->op_ppaddr = ppaddr[OP_AELEMFAST];
5345 o->op_private = (U8)i;
a6006777 5346 GvAVn(((GVOP*)o)->op_gv);
8990e307 5347 }
79072805 5348 }
3280af22 5349 o->op_seq = PL_op_seqmax++;
79072805
LW		 5350 break;
5351
a0d0e21e 5352 case OP_MAPWHILE:
79072805
LW		 5353 case OP_GREPWHILE:
5354 case OP_AND:
5355 case OP_OR:
3280af22 5356 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5357 while (cLOGOP->op_other->op_type == OP_NULL)
5358 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5359 peep(cLOGOP->op_other);
5360 break;
5361
5362 case OP_COND_EXPR:
3280af22 5363 o->op_seq = PL_op_seqmax++;
79072805
LW		 5364 peep(cCONDOP->op_true);
5365 peep(cCONDOP->op_false);
5366 break;
5367
5368 case OP_ENTERLOOP:
3280af22 5369 o->op_seq = PL_op_seqmax++;
79072805
LW		 5370 peep(cLOOP->op_redoop);
5371 peep(cLOOP->op_nextop);
5372 peep(cLOOP->op_lastop);
5373 break;
5374
8782bef2 5375 case OP_QR:
79072805
LW		 5376 case OP_MATCH:
5377 case OP_SUBST:
3280af22 5378 o->op_seq = PL_op_seqmax++;
a0d0e21e 5379 peep(cPMOP->op_pmreplstart);
79072805
LW		 5380 break;
5381
a0d0e21e 5382 case OP_EXEC:
3280af22 5383 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5384 if (ckWARN(WARN_SYNTAX) && o->op_next
5385 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5386 if (o->op_next->op_sibling &&
20408e3c
GS		 5387 o->op_next->op_sibling->op_type != OP_EXIT &&
5388 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5389 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5390 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5391
3280af22 5392 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
599cee73
PM		 5393 warner(WARN_SYNTAX, "Statement unlikely to be reached");
5394 warner(WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5395 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5396 }
5397 }
5398 break;
aeea060c 5399
c750a3ec
MB		 5400 case OP_HELEM: {
5401 UNOP *rop;
5402 SV *lexname;
5403 GV **fields;
5404 SV **svp, **indsvp;
5405 I32 ind;
5406 char *key;
5407 STRLEN keylen;
aeea060c 5408
c750a3ec
MB		 5409 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
5410 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5411 break;
5412 rop = (UNOP*)((BINOP*)o)->op_first;
5413 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5414 break;
3280af22 5415 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 5416 if (!SvOBJECT(lexname))
5417 break;
5196be3e 5418 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5419 if (!fields || !GvHV(*fields))
5420 break;
5421 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5422 key = SvPV(*svp, keylen);
5423 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5424 if (!indsvp) {
5425 croak("No such field \"%s\" in variable %s of type %s",
3280af22 5426 key, SvPV(lexname, PL_na), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 5427 }
5428 ind = SvIV(*indsvp);
5429 if (ind < 1)
5430 croak("Bad index while coercing array into hash");
5431 rop->op_type = OP_RV2AV;
5432 rop->op_ppaddr = ppaddr[OP_RV2AV];
5433 o->op_type = OP_AELEM;
5434 o->op_ppaddr = ppaddr[OP_AELEM];
5435 SvREFCNT_dec(*svp);
5436 *svp = newSViv(ind);
5437 break;
5438 }
5439
79072805 5440 default:
3280af22 5441 o->op_seq = PL_op_seqmax++;
79072805
LW		 5442 break;
5443 }
a0d0e21e 5444 oldop = o;
79072805 5445 }
a0d0e21e 5446 LEAVE;
79072805 5447}
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