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[win32] merge change#896 from maintbranch
[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
e50aee73 21/*
5dc0d613 22 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 23 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 24 */
11343788 25#define CHECKOP(type,o) \
28757baa 26 ((op_mask && op_mask[type]) \
5dc0d613 27 ? ( op_free((OP*)o), \
28757baa 28 croak("%s trapped by operation mask", op_desc[type]), \
29 Nullop ) \
11343788 30 : (*check[type])((OP*)o))
e50aee73 31
11343788 32static I32 list_assignment _((OP *o));
3bc5dc61 33static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 34static OP *modkids _((OP *o, I32 type));
35static OP *no_fh_allowed _((OP *o));
5dc0d613 36static bool scalar_mod_type _((OP *o, I32 type));
11343788
MB		 37static OP *scalarboolean _((OP *o));
38static OP *too_few_arguments _((OP *o, char* name));
39static OP *too_many_arguments _((OP *o, char* name));
40static void null _((OP* o));
bbce6d69 41static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
748a9306 42 CV* startcv, I32 cx_ix));
54b9620d 43static OP *newDEFSVOP _((void));
883ffac3 44static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
79072805 45
4633a7c4 46static char*
8ac85365 47gv_ename(GV *gv)
4633a7c4
LW		 48{
49 SV* tmpsv = sv_newmortal();
46fc3d4c 50 gv_efullname3(tmpsv, gv, Nullch);
4633a7c4
LW		 51 return SvPV(tmpsv,na);
52}
53
8990e307 54static OP *
8ac85365 55no_fh_allowed(OP *o)
79072805 56{
46fc3d4c 57 yyerror(form("Missing comma after first argument to %s function",
5196be3e 58 op_desc[o->op_type]));
11343788 59 return o;
79072805
LW		 60}
61
8990e307 62static OP *
8ac85365 63too_few_arguments(OP *o, char *name)
79072805 64{
46fc3d4c 65 yyerror(form("Not enough arguments for %s", name));
11343788 66 return o;
79072805
LW		 67}
68
8990e307 69static OP *
8ac85365 70too_many_arguments(OP *o, char *name)
79072805 71{
46fc3d4c 72 yyerror(form("Too many arguments for %s", name));
11343788 73 return o;
79072805
LW		 74}
75
3bc5dc61 76static void
8ac85365 77bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 78{
46fc3d4c 79 yyerror(form("Type of arg %d to %s must be %s (not %s)",
80 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 81}
82
a0d0e21e 83void
8ac85365 84assertref(OP *o)
a0d0e21e 85{
11343788 86 int type = o->op_type;
a0d0e21e 87 if (type != OP_AELEM && type != OP_HELEM) {
46fc3d4c 88 yyerror(form("Can't use subscript on %s", op_desc[type]));
bde90e66 89 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 90 dTHR;
bde90e66
HS		 91 SV *msg = sv_2mortal(
92 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
93 type == OP_ENTERSUB ? '&' : '%'));
94 if (in_eval & 2)
95 warn("%_", msg);
96 else if (in_eval)
97 sv_catsv(GvSV(errgv), msg);
98 else
99 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
100 }
a0d0e21e
LW		 101 }
102}
103
79072805
LW		 104/* "register" allocation */
105
106PADOFFSET
8ac85365 107pad_allocmy(char *name)
93a17b20 108{
11343788 109 dTHR;
a0d0e21e
LW		 110 PADOFFSET off;
111 SV *sv;
112
113 if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) {
46fc3d4c 114 if (!isPRINT(name[1])) {
115 name[3] = '\0';
116 name[2] = toCTRL(name[1]);
117 name[1] = '^';
118 }
a0d0e21e
LW		 119 croak("Can't use global %s in \"my\"",name);
120 }
93965878 121 if (dowarn && AvFILLp(comppad_name) >= 0) {
b1cb66bf 122 SV **svp = AvARRAY(comppad_name);
93965878 123 for (off = AvFILLp(comppad_name); off > comppad_name_floor; off--) {
b1cb66bf 124 if ((sv = svp[off])
125 && sv != &sv_undef
126 && SvIVX(sv) == 999999999 /* var is in open scope */
127 && strEQ(name, SvPVX(sv)))
128 {
129 warn("\"my\" variable %s masks earlier declaration in same scope", name);
130 break;
131 }
132 }
133 }
a0d0e21e
LW		 134 off = pad_alloc(OP_PADSV, SVs_PADMY);
135 sv = NEWSV(1102,0);
93a17b20
LW		 136 sv_upgrade(sv, SVt_PVNV);
137 sv_setpv(sv, name);
c750a3ec
MB		 138 if (in_my_stash) {
139 if (*name != '$')
140 croak("Can't declare class for non-scalar %s in \"my\"",name);
141 SvOBJECT_on(sv);
142 (void)SvUPGRADE(sv, SVt_PVMG);
143 SvSTASH(sv) = (HV*)SvREFCNT_inc(in_my_stash);
144 sv_objcount++;
145 }
8990e307 146 av_store(comppad_name, off, sv);
748a9306 147 SvNVX(sv) = (double)999999999;
8990e307
LW		 148 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
149 if (!min_intro_pending)
150 min_intro_pending = off;
151 max_intro_pending = off;
93a17b20 152 if (*name == '@')
463ee0b2 153 av_store(comppad, off, (SV*)newAV());
93a17b20 154 else if (*name == '%')
463ee0b2 155 av_store(comppad, off, (SV*)newHV());
ed6116ce 156 SvPADMY_on(curpad[off]);
93a17b20
LW		 157 return off;
158}
159
748a9306 160static PADOFFSET
bbce6d69 161pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix)
93a17b20 162{
11343788 163 dTHR;
748a9306 164 CV *cv;
93a17b20
LW		 165 I32 off;
166 SV *sv;
93a17b20 167 register I32 i;
c09156bb 168 register PERL_CONTEXT *cx;
a0d0e21e 169 int saweval;
93a17b20 170
748a9306 171 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 172 AV *curlist = CvPADLIST(cv);
173 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 174 AV *curname;
4fdae800 175
748a9306 176 if (!svp || *svp == &sv_undef)
4633a7c4 177 continue;
748a9306
LW		 178 curname = (AV*)*svp;
179 svp = AvARRAY(curname);
93965878 180 for (off = AvFILLp(curname); off > 0; off--) {
748a9306
LW		 181 if ((sv = svp[off]) &&
182 sv != &sv_undef &&
183 seq <= SvIVX(sv) &&
13826f2c 184 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 185 strEQ(SvPVX(sv), name))
186 {
5f05dabc 187 I32 depth;
188 AV *oldpad;
189 SV *oldsv;
190
191 depth = CvDEPTH(cv);
192 if (!depth) {
9607fc9c 193 if (newoff) {
194 if (SvFAKE(sv))
195 continue;
4fdae800 196 return 0; /* don't clone from inactive stack frame */
9607fc9c 197 }
5f05dabc 198 depth = 1;
199 }
200 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
201 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 202 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 203 SV *namesv = NEWSV(1103,0);
748a9306 204 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 205 sv_upgrade(namesv, SVt_PVNV);
206 sv_setpv(namesv, name);
207 av_store(comppad_name, newoff, namesv);
208 SvNVX(namesv) = (double)curcop->cop_seq;
209 SvIVX(namesv) = 999999999; /* A ref, intro immediately */
210 SvFAKE_on(namesv); /* A ref, not a real var */
774d564b 211 if (CvANON(compcv) || SvTYPE(compcv) == SVt_PVFM) {
28757baa 212 /* "It's closures all the way down." */
213 CvCLONE_on(compcv);
54310121 214 if (cv == startcv) {
215 if (CvANON(compcv))
216 oldsv = Nullsv; /* no need to keep ref */
217 }
218 else {
28757baa 219 CV *bcv;
220 for (bcv = startcv;
221 bcv && bcv != cv && !CvCLONE(bcv);
222 bcv = CvOUTSIDE(bcv)) {
223 if (CvANON(bcv))
224 CvCLONE_on(bcv);
225 else {
774d564b 226 if (dowarn && !CvUNIQUE(cv))
44a8e56a 227 warn(
228 "Variable \"%s\" may be unavailable",
28757baa 229 name);
230 break;
231 }
232 }
233 }
234 }
44a8e56a 235 else if (!CvUNIQUE(compcv)) {
9607fc9c 236 if (dowarn && !SvFAKE(sv) && !CvUNIQUE(cv))
44a8e56a 237 warn("Variable \"%s\" will not stay shared", name);
5f05dabc 238 }
748a9306 239 }
199100c8 240 av_store(comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 241 return newoff;
242 }
93a17b20
LW		 243 }
244 }
245
246 /* Nothing in current lexical context--try eval's context, if any.
247 * This is necessary to let the perldb get at lexically scoped variables.
248 * XXX This will also probably interact badly with eval tree caching.
249 */
250
a0d0e21e 251 saweval = 0;
748a9306 252 for (i = cx_ix; i >= 0; i--) {
93a17b20
LW		 253 cx = &cxstack[i];
254 switch (cx->cx_type) {
255 default:
748a9306
LW		 256 if (i == 0 && saweval) {
257 seq = cxstack[saweval].blk_oldcop->cop_seq;
258 return pad_findlex(name, newoff, seq, main_cv, 0);
259 }
93a17b20
LW		 260 break;
261 case CXt_EVAL:
44a8e56a 262 switch (cx->blk_eval.old_op_type) {
263 case OP_ENTEREVAL:
264 saweval = i;
265 break;
266 case OP_REQUIRE:
267 /* require must have its own scope */
268 return 0;
269 }
93a17b20
LW		 270 break;
271 case CXt_SUB:
272 if (!saweval)
273 return 0;
274 cv = cx->blk_sub.cv;
748a9306
LW		 275 if (debstash && CvSTASH(cv) == debstash) { /* ignore DB'* scope */
276 saweval = i; /* so we know where we were called from */
93a17b20 277 continue;
93a17b20 278 }
748a9306
LW		 279 seq = cxstack[saweval].blk_oldcop->cop_seq;
280 return pad_findlex(name, newoff, seq, cv, i-1);
93a17b20
LW		 281 }
282 }
283
748a9306
LW		 284 return 0;
285}
a0d0e21e 286
748a9306 287PADOFFSET
8ac85365 288pad_findmy(char *name)
748a9306 289{
11343788 290 dTHR;
748a9306 291 I32 off;
54310121 292 I32 pendoff = 0;
748a9306
LW		 293 SV *sv;
294 SV **svp = AvARRAY(comppad_name);
bbce6d69 295 U32 seq = cop_seqmax;
748a9306 296
11343788
MB		 297#ifdef USE_THREADS
298 /*
299 * Special case to get lexical (and hence per-thread) @_.
300 * XXX I need to find out how to tell at parse-time whether use
301 * of @_ should refer to a lexical (from a sub) or defgv (global
302 * scope and maybe weird sub-ish things like formats). See
303 * startsub in perly.y. It's possible that @_ could be lexical
304 * (at least from subs) even in non-threaded perl.
305 */
306 if (strEQ(name, "@_"))
307 return 0; /* success. (NOT_IN_PAD indicates failure) */
308#endif /* USE_THREADS */
309
748a9306 310 /* The one we're looking for is probably just before comppad_name_fill. */
93965878 311 for (off = AvFILLp(comppad_name); off > 0; off--) {
a0d0e21e
LW		 312 if ((sv = svp[off]) &&
313 sv != &sv_undef &&
54310121 314 (!SvIVX(sv) ||
315 (seq <= SvIVX(sv) &&
316 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 317 strEQ(SvPVX(sv), name))
318 {
54310121 319 if (SvIVX(sv))
320 return (PADOFFSET)off;
321 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 322 }
323 }
748a9306
LW		 324
325 /* See if it's in a nested scope */
326 off = pad_findlex(name, 0, seq, CvOUTSIDE(compcv), cxstack_ix);
54310121 327 if (off) {
328 /* If there is a pending local definition, this new alias must die */
329 if (pendoff)
330 SvIVX(AvARRAY(comppad_name)[off]) = seq;
11343788 331 return off; /* pad_findlex returns 0 for failure...*/
54310121 332 }
11343788 333 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 334}
335
336void
8ac85365 337pad_leavemy(I32 fill)
93a17b20
LW		 338{
339 I32 off;
8990e307 340 SV **svp = AvARRAY(comppad_name);
93a17b20 341 SV *sv;
8990e307
LW		 342 if (min_intro_pending && fill < min_intro_pending) {
343 for (off = max_intro_pending; off >= min_intro_pending; off--) {
a0d0e21e 344 if ((sv = svp[off]) && sv != &sv_undef)
8990e307
LW		 345 warn("%s never introduced", SvPVX(sv));
346 }
347 }
348 /* "Deintroduce" my variables that are leaving with this scope. */
93965878 349 for (off = AvFILLp(comppad_name); off > fill; off--) {
748a9306 350 if ((sv = svp[off]) && sv != &sv_undef && SvIVX(sv) == 999999999)
463ee0b2 351 SvIVX(sv) = cop_seqmax;
93a17b20
LW		 352 }
353}
354
355PADOFFSET
8ac85365 356pad_alloc(I32 optype, U32 tmptype)
79072805 357{
11343788 358 dTHR;
79072805
LW		 359 SV *sv;
360 I32 retval;
361
362 if (AvARRAY(comppad) != curpad)
463ee0b2 363 croak("panic: pad_alloc");
a0d0e21e
LW		 364 if (pad_reset_pending)
365 pad_reset();
ed6116ce 366 if (tmptype & SVs_PADMY) {
79072805 367 do {
93965878 368 sv = *av_fetch(comppad, AvFILLp(comppad) + 1, TRUE);
ed6116ce 369 } while (SvPADBUSY(sv)); /* need a fresh one */
93965878 370 retval = AvFILLp(comppad);
79072805
LW		 371 }
372 else {
bbce6d69 373 SV **names = AvARRAY(comppad_name);
93965878 374 SSize_t names_fill = AvFILLp(comppad_name);
bbce6d69 375 for (;;) {
376 /*
377 * "foreach" index vars temporarily become aliases to non-"my"
378 * values. Thus we must skip, not just pad values that are
379 * marked as current pad values, but also those with names.
380 */
381 if (++padix <= names_fill &&
382 (sv = names[padix]) && sv != &sv_undef)
383 continue;
384 sv = *av_fetch(comppad, padix, TRUE);
385 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
386 break;
387 }
79072805
LW		 388 retval = padix;
389 }
8990e307 390 SvFLAGS(sv) |= tmptype;
79072805 391 curpad = AvARRAY(comppad);
11343788 392#ifdef USE_THREADS
5dc0d613
MB		 393 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
394 (unsigned long) thr, (unsigned long) curpad,
395 (long) retval, op_name[optype]));
11343788 396#else
d9bb4600
GS		 397 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
398 (unsigned long) curpad,
5dc0d613 399 (long) retval, op_name[optype]));
11343788 400#endif /* USE_THREADS */
79072805
LW		 401 return (PADOFFSET)retval;
402}
403
404SV *
8990e307 405pad_sv(PADOFFSET po)
79072805 406{
11343788
MB		 407 dTHR;
408#ifdef USE_THREADS
5dc0d613
MB		 409 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
410 (unsigned long) thr, (unsigned long) curpad, po));
11343788 411#else
79072805 412 if (!po)
463ee0b2 413 croak("panic: pad_sv po");
d9bb4600
GS		 414 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
415 (unsigned long) curpad, po));
11343788 416#endif /* USE_THREADS */
79072805
LW		 417 return curpad[po]; /* eventually we'll turn this into a macro */
418}
419
420void
8990e307 421pad_free(PADOFFSET po)
79072805 422{
11343788 423 dTHR;
a0d0e21e
LW		 424 if (!curpad)
425 return;
79072805 426 if (AvARRAY(comppad) != curpad)
463ee0b2 427 croak("panic: pad_free curpad");
79072805 428 if (!po)
463ee0b2 429 croak("panic: pad_free po");
11343788 430#ifdef USE_THREADS
5dc0d613
MB		 431 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
432 (unsigned long) thr, (unsigned long) curpad, po));
11343788 433#else
d9bb4600
GS		 434 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
435 (unsigned long) curpad, po));
11343788 436#endif /* USE_THREADS */
a0d0e21e 437 if (curpad[po] && curpad[po] != &sv_undef)
ed6116ce 438 SvPADTMP_off(curpad[po]);
a0d0e21e 439 if ((I32)po < padix)
79072805
LW		 440 padix = po - 1;
441}
442
443void
8990e307 444pad_swipe(PADOFFSET po)
79072805 445{
11343788 446 dTHR;
79072805 447 if (AvARRAY(comppad) != curpad)
463ee0b2 448 croak("panic: pad_swipe curpad");
79072805 449 if (!po)
463ee0b2 450 croak("panic: pad_swipe po");
11343788 451#ifdef USE_THREADS
5dc0d613
MB		 452 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
453 (unsigned long) thr, (unsigned long) curpad, po));
11343788 454#else
d9bb4600
GS		 455 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
456 (unsigned long) curpad, po));
11343788 457#endif /* USE_THREADS */
ed6116ce 458 SvPADTMP_off(curpad[po]);
a0d0e21e
LW		 459 curpad[po] = NEWSV(1107,0);
460 SvPADTMP_on(curpad[po]);
461 if ((I32)po < padix)
79072805
LW		 462 padix = po - 1;
463}
464
d9bb4600
GS		 465/* XXX pad_reset() is currently disabled because it results in serious bugs.
466 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
467 * on the stack by OPs that use them, there are several ways to get an alias
468 * to a shared TARG. Such an alias will change randomly and unpredictably.
469 * We avoid doing this until we can think of a Better Way.
470 * GSAR 97-10-29 */
79072805 471void
8ac85365 472pad_reset(void)
79072805 473{
d9bb4600 474#ifdef USE_BROKEN_PAD_RESET
11343788 475 dTHR;
79072805
LW		 476 register I32 po;
477
478 if (AvARRAY(comppad) != curpad)
463ee0b2 479 croak("panic: pad_reset curpad");
11343788 480#ifdef USE_THREADS
5dc0d613
MB		 481 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
482 (unsigned long) thr, (unsigned long) curpad));
11343788 483#else
d9bb4600
GS		 484 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
485 (unsigned long) curpad));
11343788 486#endif /* USE_THREADS */
748a9306
LW		 487 if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */
488 for (po = AvMAX(comppad); po > padix_floor; po--) {
ff0cee69 489 if (curpad[po] && !SvIMMORTAL(curpad[po]))
748a9306
LW		 490 SvPADTMP_off(curpad[po]);
491 }
492 padix = padix_floor;
79072805 493 }
d9bb4600 494#endif
a0d0e21e 495 pad_reset_pending = FALSE;
79072805
LW		 496}
497
a863c7d1 498#ifdef USE_THREADS
54b9620d 499/* find_threadsv is not reentrant */
a863c7d1 500PADOFFSET
54b9620d 501find_threadsv(char *name)
a863c7d1
MB		 502{
503 dTHR;
504 char *p;
505 PADOFFSET key;
554b3eca 506 SV **svp;
54b9620d
MB		 507 /* We currently only handle names of a single character */
508 p = strchr(threadsv_names, *name);
a863c7d1
MB		 509 if (!p)
510 return NOT_IN_PAD;
54b9620d
MB		 511 key = p - threadsv_names;
512 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 513 if (!svp) {
514 SV *sv = NEWSV(0, 0);
54b9620d 515 av_store(thr->threadsv, key, sv);
940cb80d 516 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 517 /*
518 * Some magic variables used to be automagically initialised
519 * in gv_fetchpv. Those which are now per-thread magicals get
520 * initialised here instead.
521 */
522 switch (*name) {
54b9620d
MB		 523 case '_':
524 break;
554b3eca
MB		 525 case ';':
526 sv_setpv(sv, "\034");
54b9620d 527 sv_magic(sv, 0, 0, name, 1);
554b3eca 528 break;
c277df42
IZ		 529 case '&':
530 case '`':
531 case '\'':
532 sawampersand = TRUE;
533 SvREADONLY_on(sv);
d8b5173a 534 /* FALL THROUGH */
54b9620d
MB		 535 default:
536 sv_magic(sv, 0, 0, name, 1);
554b3eca 537 }
a863c7d1 538 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
54b9620d 539 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 540 sv, (*name < 32) ? "^" : "",
541 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 542 }
543 return key;
544}
545#endif /* USE_THREADS */
546
79072805
LW		 547/* Destructor */
548
549void
8ac85365 550op_free(OP *o)
79072805 551{
85e6fe83 552 register OP *kid, *nextkid;
79072805 553
5dc0d613 554 if (!o || o->op_seq == (U16)-1)
79072805
LW		 555 return;
556
11343788
MB		 557 if (o->op_flags & OPf_KIDS) {
558 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 559 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 560 op_free(kid);
85e6fe83 561 }
79072805
LW		 562 }
563
11343788 564 switch (o->op_type) {
8990e307 565 case OP_NULL:
11343788 566 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 567 break;
a0d0e21e 568 case OP_ENTEREVAL:
11343788 569 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 570 break;
554b3eca 571#ifdef USE_THREADS
2faa37cc 572 case OP_THREADSV:
54b9620d 573 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 574 break;
575#endif /* USE_THREADS */
a6006777 576 default:
5196be3e 577 if (!(o->op_flags & OPf_REF) || (check[o->op_type] != ck_ftst))
a6006777 578 break;
579 /* FALL THROUGH */
463ee0b2 580 case OP_GVSV:
79072805 581 case OP_GV:
a6006777 582 case OP_AELEMFAST:
11343788 583 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 584 break;
585 case OP_NEXTSTATE:
586 case OP_DBSTATE:
5196be3e 587 Safefree(cCOPo->cop_label);
11343788 588 SvREFCNT_dec(cCOPo->cop_filegv);
79072805
LW		 589 break;
590 case OP_CONST:
11343788 591 SvREFCNT_dec(cSVOPo->op_sv);
79072805 592 break;
748a9306
LW		 593 case OP_GOTO:
594 case OP_NEXT:
595 case OP_LAST:
596 case OP_REDO:
11343788 597 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 598 break;
599 /* FALL THROUGH */
a0d0e21e 600 case OP_TRANS:
11343788 601 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 602 break;
603 case OP_SUBST:
11343788 604 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 605 /* FALL THROUGH */
748a9306 606 case OP_PUSHRE:
a0d0e21e 607 case OP_MATCH:
c277df42 608 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 609 break;
79072805
LW		 610 }
611
11343788
MB		 612 if (o->op_targ > 0)
613 pad_free(o->op_targ);
8990e307 614
11343788 615 Safefree(o);
79072805
LW		 616}
617
8990e307 618static void
8ac85365 619null(OP *o)
8990e307 620{
54b9620d 621 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 622 pad_free(o->op_targ);
623 o->op_targ = o->op_type;
624 o->op_type = OP_NULL;
625 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 626}
627
79072805
LW		 628/* Contextualizers */
629
463ee0b2 630#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 631
632OP *
8ac85365 633linklist(OP *o)
79072805
LW		 634{
635 register OP *kid;
636
11343788
MB		 637 if (o->op_next)
638 return o->op_next;
79072805
LW		 639
640 /* establish postfix order */
11343788
MB		 641 if (cUNOPo->op_first) {
642 o->op_next = LINKLIST(cUNOPo->op_first);
643 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 644 if (kid->op_sibling)
645 kid->op_next = LINKLIST(kid->op_sibling);
646 else
11343788 647 kid->op_next = o;
79072805
LW		 648 }
649 }
650 else
11343788 651 o->op_next = o;
79072805 652
11343788 653 return o->op_next;
79072805
LW		 654}
655
656OP *
8ac85365 657scalarkids(OP *o)
79072805
LW		 658{
659 OP *kid;
11343788
MB		 660 if (o && o->op_flags & OPf_KIDS) {
661 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 662 scalar(kid);
663 }
11343788 664 return o;
79072805
LW		 665}
666
a0d0e21e 667static OP *
8ac85365 668scalarboolean(OP *o)
8990e307
LW		 669{
670 if (dowarn &&
11343788 671 o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 672 dTHR;
a0d0e21e
LW		 673 line_t oldline = curcop->cop_line;
674
675 if (copline != NOLINE)
676 curcop->cop_line = copline;
677 warn("Found = in conditional, should be ==");
678 curcop->cop_line = oldline;
679 }
11343788 680 return scalar(o);
8990e307
LW		 681}
682
683OP *
8ac85365 684scalar(OP *o)
79072805
LW		 685{
686 OP *kid;
687
a0d0e21e 688 /* assumes no premature commitment */
5dc0d613
MB		 689 if (!o || (o->op_flags & OPf_WANT) || error_count
690 || o->op_type == OP_RETURN)
11343788 691 return o;
79072805 692
5dc0d613 693 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 694
11343788 695 switch (o->op_type) {
79072805 696 case OP_REPEAT:
11343788
MB		 697 if (o->op_private & OPpREPEAT_DOLIST)
698 null(((LISTOP*)cBINOPo->op_first)->op_first);
699 scalar(cBINOPo->op_first);
8990e307 700 break;
79072805
LW		 701 case OP_OR:
702 case OP_AND:
703 case OP_COND_EXPR:
11343788 704 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 705 scalar(kid);
79072805 706 break;
a0d0e21e 707 case OP_SPLIT:
11343788 708 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 709 if (!kPMOP->op_pmreplroot)
710 deprecate("implicit split to @_");
711 }
712 /* FALL THROUGH */
79072805
LW		 713 case OP_MATCH:
714 case OP_SUBST:
715 case OP_NULL:
8990e307 716 default:
11343788
MB		 717 if (o->op_flags & OPf_KIDS) {
718 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 719 scalar(kid);
720 }
79072805
LW		 721 break;
722 case OP_LEAVE:
723 case OP_LEAVETRY:
5dc0d613 724 kid = cLISTOPo->op_first;
54310121 725 scalar(kid);
726 while (kid = kid->op_sibling) {
727 if (kid->op_sibling)
728 scalarvoid(kid);
729 else
730 scalar(kid);
731 }
0f15f207 732 WITH_THR(curcop = &compiling);
54310121 733 break;
748a9306 734 case OP_SCOPE:
79072805 735 case OP_LINESEQ:
8990e307 736 case OP_LIST:
11343788 737 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 738 if (kid->op_sibling)
739 scalarvoid(kid);
740 else
741 scalar(kid);
742 }
0f15f207 743 WITH_THR(curcop = &compiling);
79072805
LW		 744 break;
745 }
11343788 746 return o;
79072805
LW		 747}
748
749OP *
8ac85365 750scalarvoid(OP *o)
79072805
LW		 751{
752 OP *kid;
8990e307
LW		 753 char* useless = 0;
754 SV* sv;
79072805 755
54310121 756 /* assumes no premature commitment */
5dc0d613
MB		 757 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count
758 || o->op_type == OP_RETURN)
11343788 759 return o;
79072805 760
5dc0d613 761 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 762
11343788 763 switch (o->op_type) {
79072805 764 default:
11343788 765 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 766 break;
36477c24 767 /* FALL THROUGH */
768 case OP_REPEAT:
11343788 769 if (o->op_flags & OPf_STACKED)
8990e307
LW		 770 break;
771 /* FALL THROUGH */
772 case OP_GVSV:
773 case OP_WANTARRAY:
774 case OP_GV:
775 case OP_PADSV:
776 case OP_PADAV:
777 case OP_PADHV:
778 case OP_PADANY:
779 case OP_AV2ARYLEN:
8990e307 780 case OP_REF:
a0d0e21e
LW		 781 case OP_REFGEN:
782 case OP_SREFGEN:
8990e307
LW		 783 case OP_DEFINED:
784 case OP_HEX:
785 case OP_OCT:
786 case OP_LENGTH:
787 case OP_SUBSTR:
788 case OP_VEC:
789 case OP_INDEX:
790 case OP_RINDEX:
791 case OP_SPRINTF:
792 case OP_AELEM:
793 case OP_AELEMFAST:
794 case OP_ASLICE:
8990e307
LW		 795 case OP_HELEM:
796 case OP_HSLICE:
797 case OP_UNPACK:
798 case OP_PACK:
8990e307
LW		 799 case OP_JOIN:
800 case OP_LSLICE:
801 case OP_ANONLIST:
802 case OP_ANONHASH:
803 case OP_SORT:
804 case OP_REVERSE:
805 case OP_RANGE:
806 case OP_FLIP:
807 case OP_FLOP:
808 case OP_CALLER:
809 case OP_FILENO:
810 case OP_EOF:
811 case OP_TELL:
812 case OP_GETSOCKNAME:
813 case OP_GETPEERNAME:
814 case OP_READLINK:
815 case OP_TELLDIR:
816 case OP_GETPPID:
817 case OP_GETPGRP:
818 case OP_GETPRIORITY:
819 case OP_TIME:
820 case OP_TMS:
821 case OP_LOCALTIME:
822 case OP_GMTIME:
823 case OP_GHBYNAME:
824 case OP_GHBYADDR:
825 case OP_GHOSTENT:
826 case OP_GNBYNAME:
827 case OP_GNBYADDR:
828 case OP_GNETENT:
829 case OP_GPBYNAME:
830 case OP_GPBYNUMBER:
831 case OP_GPROTOENT:
832 case OP_GSBYNAME:
833 case OP_GSBYPORT:
834 case OP_GSERVENT:
835 case OP_GPWNAM:
836 case OP_GPWUID:
837 case OP_GGRNAM:
838 case OP_GGRGID:
839 case OP_GETLOGIN:
11343788
MB		 840 if (!(o->op_private & OPpLVAL_INTRO))
841 useless = op_desc[o->op_type];
8990e307
LW		 842 break;
843
844 case OP_RV2GV:
845 case OP_RV2SV:
846 case OP_RV2AV:
847 case OP_RV2HV:
11343788
MB		 848 if (!(o->op_private & OPpLVAL_INTRO) &&
849 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 850 useless = "a variable";
851 break;
79072805 852
93a17b20 853 case OP_NEXTSTATE:
8990e307 854 case OP_DBSTATE:
0f15f207 855 WITH_THR(curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 856 break;
857
79072805 858 case OP_CONST:
11343788 859 sv = cSVOPo->op_sv;
8990e307
LW		 860 if (dowarn) {
861 useless = "a constant";
862 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
863 useless = 0;
864 else if (SvPOK(sv)) {
865 if (strnEQ(SvPVX(sv), "di", 2) ||
a0d0e21e 866 strnEQ(SvPVX(sv), "ds", 2) ||
8990e307
LW		 867 strnEQ(SvPVX(sv), "ig", 2))
868 useless = 0;
869 }
870 }
11343788 871 null(o); /* don't execute a constant */
8990e307 872 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 873 break;
874
875 case OP_POSTINC:
11343788
MB		 876 o->op_type = OP_PREINC; /* pre-increment is faster */
877 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 878 break;
879
880 case OP_POSTDEC:
11343788
MB		 881 o->op_type = OP_PREDEC; /* pre-decrement is faster */
882 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 883 break;
884
79072805
LW		 885 case OP_OR:
886 case OP_AND:
887 case OP_COND_EXPR:
11343788 888 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 889 scalarvoid(kid);
890 break;
5aabfad6 891
a0d0e21e 892 case OP_NULL:
11343788 893 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
0f15f207 894 WITH_THR(curcop = ((COP*)o)); /* for warning below */
11343788 895 if (o->op_flags & OPf_STACKED)
a0d0e21e 896 break;
5aabfad6 897 /* FALL THROUGH */
79072805
LW		 898 case OP_ENTERTRY:
899 case OP_ENTER:
900 case OP_SCALAR:
11343788 901 if (!(o->op_flags & OPf_KIDS))
79072805 902 break;
54310121 903 /* FALL THROUGH */
463ee0b2 904 case OP_SCOPE:
79072805
LW		 905 case OP_LEAVE:
906 case OP_LEAVETRY:
a0d0e21e 907 case OP_LEAVELOOP:
79072805 908 case OP_LINESEQ:
79072805 909 case OP_LIST:
11343788 910 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 911 scalarvoid(kid);
912 break;
c90c0ff4 913 case OP_ENTEREVAL:
5196be3e 914 scalarkids(o);
c90c0ff4 915 break;
5aabfad6 916 case OP_REQUIRE:
c90c0ff4 917 /* all requires must return a boolean value */
5196be3e
MB		 918 o->op_flags &= ~OPf_WANT;
919 return scalar(o);
a0d0e21e 920 case OP_SPLIT:
11343788 921 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 922 if (!kPMOP->op_pmreplroot)
923 deprecate("implicit split to @_");
924 }
925 break;
79072805 926 }
8990e307
LW		 927 if (useless && dowarn)
928 warn("Useless use of %s in void context", useless);
11343788 929 return o;
79072805
LW		 930}
931
932OP *
8ac85365 933listkids(OP *o)
79072805
LW		 934{
935 OP *kid;
11343788
MB		 936 if (o && o->op_flags & OPf_KIDS) {
937 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 938 list(kid);
939 }
11343788 940 return o;
79072805
LW		 941}
942
943OP *
8ac85365 944list(OP *o)
79072805
LW		 945{
946 OP *kid;
947
a0d0e21e 948 /* assumes no premature commitment */
5dc0d613
MB		 949 if (!o || (o->op_flags & OPf_WANT) || error_count
950 || o->op_type == OP_RETURN)
11343788 951 return o;
79072805 952
5dc0d613 953 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 954
11343788 955 switch (o->op_type) {
79072805
LW		 956 case OP_FLOP:
957 case OP_REPEAT:
11343788 958 list(cBINOPo->op_first);
79072805
LW		 959 break;
960 case OP_OR:
961 case OP_AND:
962 case OP_COND_EXPR:
11343788 963 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 964 list(kid);
965 break;
966 default:
967 case OP_MATCH:
968 case OP_SUBST:
969 case OP_NULL:
11343788 970 if (!(o->op_flags & OPf_KIDS))
79072805 971 break;
11343788
MB		 972 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
973 list(cBINOPo->op_first);
974 return gen_constant_list(o);
79072805
LW		 975 }
976 case OP_LIST:
11343788 977 listkids(o);
79072805
LW		 978 break;
979 case OP_LEAVE:
980 case OP_LEAVETRY:
5dc0d613 981 kid = cLISTOPo->op_first;
54310121 982 list(kid);
983 while (kid = kid->op_sibling) {
984 if (kid->op_sibling)
985 scalarvoid(kid);
986 else
987 list(kid);
988 }
0f15f207 989 WITH_THR(curcop = &compiling);
54310121 990 break;
748a9306 991 case OP_SCOPE:
79072805 992 case OP_LINESEQ:
11343788 993 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 994 if (kid->op_sibling)
995 scalarvoid(kid);
996 else
997 list(kid);
998 }
0f15f207 999 WITH_THR(curcop = &compiling);
79072805 1000 break;
c90c0ff4 1001 case OP_REQUIRE:
1002 /* all requires must return a boolean value */
5196be3e
MB		 1003 o->op_flags &= ~OPf_WANT;
1004 return scalar(o);
79072805 1005 }
11343788 1006 return o;
79072805
LW		 1007}
1008
1009OP *
8ac85365 1010scalarseq(OP *o)
79072805
LW		 1011{
1012 OP *kid;
1013
11343788
MB		 1014 if (o) {
1015 if (o->op_type == OP_LINESEQ ||
1016 o->op_type == OP_SCOPE ||
1017 o->op_type == OP_LEAVE ||
1018 o->op_type == OP_LEAVETRY)
463ee0b2 1019 {
0f15f207 1020 dTHR;
11343788 1021 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1022 if (kid->op_sibling) {
463ee0b2 1023 scalarvoid(kid);
ed6116ce 1024 }
463ee0b2
LW		 1025 }
1026 curcop = &compiling;
79072805 1027 }
11343788 1028 o->op_flags &= ~OPf_PARENS;
85e6fe83 1029 if (hints & HINT_BLOCK_SCOPE)
11343788 1030 o->op_flags |= OPf_PARENS;
79072805 1031 }
8990e307 1032 else
11343788
MB		 1033 o = newOP(OP_STUB, 0);
1034 return o;
79072805
LW		 1035}
1036
a0d0e21e 1037static OP *
8ac85365 1038modkids(OP *o, I32 type)
79072805
LW		 1039{
1040 OP *kid;
11343788
MB		 1041 if (o && o->op_flags & OPf_KIDS) {
1042 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1043 mod(kid, type);
79072805 1044 }
11343788 1045 return o;
79072805
LW		 1046}
1047
463ee0b2 1048static I32 modcount;
79072805
LW		 1049
1050OP *
8ac85365 1051mod(OP *o, I32 type)
79072805 1052{
11343788 1053 dTHR;
79072805
LW		 1054 OP *kid;
1055 SV *sv;
1056
11343788
MB		 1057 if (!o || error_count)
1058 return o;
79072805 1059
11343788 1060 switch (o->op_type) {
68dc0745 1061 case OP_UNDEF:
3e3baf6d 1062 modcount++;
5dc0d613 1063 return o;
a0d0e21e 1064 case OP_CONST:
11343788 1065 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1066 goto nomod;
1067 if (eval_start && eval_start->op_type == OP_CONST) {
1068 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1069 eval_start = 0;
1070 }
1071 else if (!type) {
1072 SAVEI32(compiling.cop_arybase);
748a9306 1073 compiling.cop_arybase = 0;
a0d0e21e
LW		 1074 }
1075 else if (type == OP_REFGEN)
1076 goto nomod;
1077 else
1078 croak("That use of $[ is unsupported");
1079 break;
5f05dabc 1080 case OP_STUB:
5196be3e 1081 if (o->op_flags & OPf_PARENS)
5f05dabc 1082 break;
1083 goto nomod;
a0d0e21e
LW		 1084 case OP_ENTERSUB:
1085 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1086 !(o->op_flags & OPf_STACKED)) {
1087 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1088 o->op_ppaddr = ppaddr[OP_RV2CV];
1089 assert(cUNOPo->op_first->op_type == OP_NULL);
1090 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1091 break;
1092 }
1093 /* FALL THROUGH */
1094 default:
a0d0e21e
LW		 1095 nomod:
1096 /* grep, foreach, subcalls, refgen */
1097 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1098 break;
46fc3d4c 1099 yyerror(form("Can't modify %s in %s",
5dc0d613 1100 op_desc[o->op_type],
46fc3d4c 1101 type ? op_desc[type] : "local"));
11343788 1102 return o;
79072805 1103
a0d0e21e
LW		 1104 case OP_PREINC:
1105 case OP_PREDEC:
1106 case OP_POW:
1107 case OP_MULTIPLY:
1108 case OP_DIVIDE:
1109 case OP_MODULO:
1110 case OP_REPEAT:
1111 case OP_ADD:
1112 case OP_SUBTRACT:
1113 case OP_CONCAT:
1114 case OP_LEFT_SHIFT:
1115 case OP_RIGHT_SHIFT:
1116 case OP_BIT_AND:
1117 case OP_BIT_XOR:
1118 case OP_BIT_OR:
1119 case OP_I_MULTIPLY:
1120 case OP_I_DIVIDE:
1121 case OP_I_MODULO:
1122 case OP_I_ADD:
1123 case OP_I_SUBTRACT:
11343788 1124 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1125 goto nomod;
1126 modcount++;
1127 break;
1128
79072805 1129 case OP_COND_EXPR:
11343788 1130 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1131 mod(kid, type);
79072805
LW		 1132 break;
1133
1134 case OP_RV2AV:
1135 case OP_RV2HV:
93af7a87 1136 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1137 croak("Can't localize through a reference");
11343788 1138 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1139 modcount = 10000;
11343788 1140 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1141 }
1142 /* FALL THROUGH */
79072805 1143 case OP_RV2GV:
5dc0d613 1144 if (scalar_mod_type(o, type))
3fe9a6f1 1145 goto nomod;
11343788 1146 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1147 /* FALL THROUGH */
1148 case OP_AASSIGN:
1149 case OP_ASLICE:
1150 case OP_HSLICE:
93a17b20
LW		 1151 case OP_NEXTSTATE:
1152 case OP_DBSTATE:
a0d0e21e
LW		 1153 case OP_REFGEN:
1154 case OP_CHOMP:
463ee0b2 1155 modcount = 10000;
79072805 1156 break;
463ee0b2 1157 case OP_RV2SV:
11343788 1158 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1159 croak("Can't localize through a reference");
aeea060c 1160 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1161 /* FALL THROUGH */
79072805 1162 case OP_GV:
463ee0b2 1163 case OP_AV2ARYLEN:
85aff577 1164 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1165 case OP_SASSIGN:
8990e307
LW		 1166 case OP_AELEMFAST:
1167 modcount++;
1168 break;
1169
748a9306
LW		 1170 case OP_PADAV:
1171 case OP_PADHV:
1172 modcount = 10000;
5196be3e
MB		 1173 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1174 return o; /* Treat \(@foo) like ordinary list. */
1175 if (scalar_mod_type(o, type))
3fe9a6f1 1176 goto nomod;
748a9306
LW		 1177 /* FALL THROUGH */
1178 case OP_PADSV:
1179 modcount++;
1180 if (!type)
1181 croak("Can't localize lexical variable %s",
11343788 1182 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1183 break;
1184
554b3eca 1185#ifdef USE_THREADS
2faa37cc 1186 case OP_THREADSV:
554b3eca 1187 modcount++; /* XXX ??? */
554b3eca
MB		 1188 break;
1189#endif /* USE_THREADS */
1190
748a9306
LW		 1191 case OP_PUSHMARK:
1192 break;
a0d0e21e 1193
69969c6f
SB		 1194 case OP_KEYS:
1195 if (type != OP_SASSIGN)
1196 goto nomod;
5f05dabc 1197 /* FALL THROUGH */
a0d0e21e 1198 case OP_POS:
463ee0b2 1199 case OP_VEC:
a0d0e21e 1200 case OP_SUBSTR:
11343788
MB		 1201 pad_free(o->op_targ);
1202 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1203 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1204 if (o->op_flags & OPf_KIDS)
1205 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1206 break;
a0d0e21e 1207
463ee0b2
LW		 1208 case OP_AELEM:
1209 case OP_HELEM:
11343788 1210 ref(cBINOPo->op_first, o->op_type);
68dc0745 1211 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1212 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1213 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1214 modcount++;
463ee0b2
LW		 1215 break;
1216
1217 case OP_SCOPE:
1218 case OP_LEAVE:
1219 case OP_ENTER:
11343788
MB		 1220 if (o->op_flags & OPf_KIDS)
1221 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1222 break;
1223
1224 case OP_NULL:
11343788 1225 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1226 break;
11343788
MB		 1227 if (o->op_targ != OP_LIST) {
1228 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1229 break;
1230 }
1231 /* FALL THROUGH */
463ee0b2 1232 case OP_LIST:
11343788 1233 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1234 mod(kid, type);
1235 break;
1236 }
11343788 1237 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1238
1239 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1240 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1241 else if (!type) {
11343788
MB		 1242 o->op_private |= OPpLVAL_INTRO;
1243 o->op_flags &= ~OPf_SPECIAL;
ca48fea7 1244 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1245 }
a0d0e21e 1246 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1247 o->op_flags |= OPf_REF;
1248 return o;
463ee0b2
LW		 1249}
1250
3fe9a6f1 1251static bool
8ac85365 1252scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1253{
1254 switch (type) {
1255 case OP_SASSIGN:
5196be3e 1256 if (o->op_type == OP_RV2GV)
3fe9a6f1 1257 return FALSE;
1258 /* FALL THROUGH */
1259 case OP_PREINC:
1260 case OP_PREDEC:
1261 case OP_POSTINC:
1262 case OP_POSTDEC:
1263 case OP_I_PREINC:
1264 case OP_I_PREDEC:
1265 case OP_I_POSTINC:
1266 case OP_I_POSTDEC:
1267 case OP_POW:
1268 case OP_MULTIPLY:
1269 case OP_DIVIDE:
1270 case OP_MODULO:
1271 case OP_REPEAT:
1272 case OP_ADD:
1273 case OP_SUBTRACT:
1274 case OP_I_MULTIPLY:
1275 case OP_I_DIVIDE:
1276 case OP_I_MODULO:
1277 case OP_I_ADD:
1278 case OP_I_SUBTRACT:
1279 case OP_LEFT_SHIFT:
1280 case OP_RIGHT_SHIFT:
1281 case OP_BIT_AND:
1282 case OP_BIT_XOR:
1283 case OP_BIT_OR:
1284 case OP_CONCAT:
1285 case OP_SUBST:
1286 case OP_TRANS:
1287 case OP_ANDASSIGN: /* may work later */
1288 case OP_ORASSIGN: /* may work later */
1289 return TRUE;
1290 default:
1291 return FALSE;
1292 }
1293}
1294
463ee0b2 1295OP *
8ac85365 1296refkids(OP *o, I32 type)
463ee0b2
LW		 1297{
1298 OP *kid;
11343788
MB		 1299 if (o && o->op_flags & OPf_KIDS) {
1300 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1301 ref(kid, type);
1302 }
11343788 1303 return o;
463ee0b2
LW		 1304}
1305
1306OP *
8ac85365 1307ref(OP *o, I32 type)
463ee0b2
LW		 1308{
1309 OP *kid;
463ee0b2 1310
11343788
MB		 1311 if (!o || error_count)
1312 return o;
463ee0b2 1313
11343788 1314 switch (o->op_type) {
a0d0e21e 1315 case OP_ENTERSUB:
e55aaa0e 1316 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1317 !(o->op_flags & OPf_STACKED)) {
1318 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1319 o->op_ppaddr = ppaddr[OP_RV2CV];
1320 assert(cUNOPo->op_first->op_type == OP_NULL);
1321 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1322 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1323 }
1324 break;
aeea060c 1325
463ee0b2 1326 case OP_COND_EXPR:
11343788 1327 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1328 ref(kid, type);
1329 break;
8990e307 1330 case OP_RV2SV:
11343788 1331 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1332 /* FALL THROUGH */
1333 case OP_PADSV:
5f05dabc 1334 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1335 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1336 : type == OP_RV2HV ? OPpDEREF_HV
1337 : OPpDEREF_SV);
11343788 1338 o->op_flags |= OPf_MOD;
a0d0e21e 1339 }
8990e307
LW		 1340 break;
1341
2faa37cc 1342 case OP_THREADSV:
a863c7d1
MB		 1343 o->op_flags |= OPf_MOD; /* XXX ??? */
1344 break;
1345
463ee0b2
LW		 1346 case OP_RV2AV:
1347 case OP_RV2HV:
aeea060c 1348 o->op_flags |= OPf_REF;
8990e307 1349 /* FALL THROUGH */
463ee0b2 1350 case OP_RV2GV:
11343788 1351 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1352 break;
8990e307 1353
463ee0b2
LW		 1354 case OP_PADAV:
1355 case OP_PADHV:
aeea060c 1356 o->op_flags |= OPf_REF;
79072805 1357 break;
aeea060c 1358
8990e307 1359 case OP_SCALAR:
79072805 1360 case OP_NULL:
11343788 1361 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1362 break;
11343788 1363 ref(cBINOPo->op_first, type);
79072805
LW		 1364 break;
1365 case OP_AELEM:
1366 case OP_HELEM:
11343788 1367 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1368 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1369 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1370 : type == OP_RV2HV ? OPpDEREF_HV
1371 : OPpDEREF_SV);
11343788 1372 o->op_flags |= OPf_MOD;
8990e307 1373 }
79072805
LW		 1374 break;
1375
463ee0b2 1376 case OP_SCOPE:
79072805
LW		 1377 case OP_LEAVE:
1378 case OP_ENTER:
8990e307 1379 case OP_LIST:
11343788 1380 if (!(o->op_flags & OPf_KIDS))
79072805 1381 break;
11343788 1382 ref(cLISTOPo->op_last, type);
79072805 1383 break;
a0d0e21e
LW		 1384 default:
1385 break;
79072805 1386 }
11343788 1387 return scalar(o);
8990e307 1388
79072805
LW		 1389}
1390
1391OP *
8ac85365 1392my(OP *o)
93a17b20
LW		 1393{
1394 OP *kid;
93a17b20
LW		 1395 I32 type;
1396
11343788
MB		 1397 if (!o || error_count)
1398 return o;
93a17b20 1399
11343788 1400 type = o->op_type;
93a17b20 1401 if (type == OP_LIST) {
11343788 1402 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1403 my(kid);
dab48698 1404 } else if (type == OP_UNDEF) {
7766148a 1405 return o;
dab48698 1406 } else if (type != OP_PADSV &&
93a17b20
LW		 1407 type != OP_PADAV &&
1408 type != OP_PADHV &&
1409 type != OP_PUSHMARK)
1410 {
5dc0d613 1411 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1412 return o;
93a17b20 1413 }
11343788
MB		 1414 o->op_flags |= OPf_MOD;
1415 o->op_private |= OPpLVAL_INTRO;
1416 return o;
93a17b20
LW		 1417}
1418
1419OP *
8ac85365 1420sawparens(OP *o)
79072805
LW		 1421{
1422 if (o)
1423 o->op_flags |= OPf_PARENS;
1424 return o;
1425}
1426
1427OP *
8ac85365 1428bind_match(I32 type, OP *left, OP *right)
79072805 1429{
11343788 1430 OP *o;
79072805 1431
2ae324a7 1432 if (dowarn &&
1433 (left->op_type == OP_RV2AV ||
1434 left->op_type == OP_RV2HV ||
1435 left->op_type == OP_PADAV ||
1436 left->op_type == OP_PADHV)) {
1437 char *desc = op_desc[(right->op_type == OP_SUBST ||
1438 right->op_type == OP_TRANS)
1439 ? right->op_type : OP_MATCH];
1440 char *sample = ((left->op_type == OP_RV2AV ||
1441 left->op_type == OP_PADAV)
1442 ? "@array" : "%hash");
1443 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1444 }
1445
79072805
LW		 1446 if (right->op_type == OP_MATCH ||
1447 right->op_type == OP_SUBST ||
1448 right->op_type == OP_TRANS) {
1449 right->op_flags |= OPf_STACKED;
1450 if (right->op_type != OP_MATCH)
463ee0b2 1451 left = mod(left, right->op_type);
79072805 1452 if (right->op_type == OP_TRANS)
11343788 1453 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1454 else
11343788 1455 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1456 if (type == OP_NOT)
11343788
MB		 1457 return newUNOP(OP_NOT, 0, scalar(o));
1458 return o;
79072805
LW		 1459 }
1460 else
1461 return bind_match(type, left,
1462 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1463}
1464
1465OP *
8ac85365 1466invert(OP *o)
79072805 1467{
11343788
MB		 1468 if (!o)
1469 return o;
79072805 1470 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1471 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1472}
1473
1474OP *
8ac85365 1475scope(OP *o)
79072805
LW		 1476{
1477 if (o) {
84902520 1478 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1479 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1480 o->op_type = OP_LEAVE;
1481 o->op_ppaddr = ppaddr[OP_LEAVE];
1482 }
1483 else {
1484 if (o->op_type == OP_LINESEQ) {
1485 OP *kid;
1486 o->op_type = OP_SCOPE;
1487 o->op_ppaddr = ppaddr[OP_SCOPE];
1488 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1489 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1490 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1491 null(kid);
748a9306 1492 }
463ee0b2
LW		 1493 }
1494 else
748a9306 1495 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1496 }
79072805
LW		 1497 }
1498 return o;
1499}
1500
a0d0e21e 1501int
8ac85365 1502block_start(int full)
79072805 1503{
11343788 1504 dTHR;
a0d0e21e 1505 int retval = savestack_ix;
55497cff 1506 SAVEI32(comppad_name_floor);
1507 if (full) {
93965878 1508 if ((comppad_name_fill = AvFILLp(comppad_name)) > 0)
55497cff 1509 comppad_name_floor = comppad_name_fill;
1510 else
1511 comppad_name_floor = 0;
1512 }
1513 SAVEI32(min_intro_pending);
1514 SAVEI32(max_intro_pending);
a0d0e21e 1515 min_intro_pending = 0;
55497cff 1516 SAVEI32(comppad_name_fill);
1517 SAVEI32(padix_floor);
a0d0e21e
LW		 1518 padix_floor = padix;
1519 pad_reset_pending = FALSE;
55497cff 1520 SAVEI32(hints);
a0d0e21e
LW		 1521 hints &= ~HINT_BLOCK_SCOPE;
1522 return retval;
1523}
1524
1525OP*
8ac85365 1526block_end(I32 floor, OP *seq)
a0d0e21e 1527{
11343788 1528 dTHR;
a0d0e21e
LW		 1529 int needblockscope = hints & HINT_BLOCK_SCOPE;
1530 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1531 LEAVE_SCOPE(floor);
1532 pad_reset_pending = FALSE;
1533 if (needblockscope)
1534 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1535 pad_leavemy(comppad_name_fill);
bbce6d69 1536 cop_seqmax++;
a0d0e21e
LW		 1537 return retval;
1538}
1539
54b9620d
MB		 1540static OP *
1541newDEFSVOP(void)
1542{
1543#ifdef USE_THREADS
1544 OP *o = newOP(OP_THREADSV, 0);
1545 o->op_targ = find_threadsv("_");
1546 return o;
1547#else
1548 return newSVREF(newGVOP(OP_GV, 0, defgv));
1549#endif /* USE_THREADS */
1550}
1551
a0d0e21e 1552void
8ac85365 1553newPROG(OP *o)
a0d0e21e 1554{
11343788 1555 dTHR;
a0d0e21e 1556 if (in_eval) {
5dc0d613 1557 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1558 eval_start = linklist(eval_root);
1559 eval_root->op_next = 0;
1560 peep(eval_start);
1561 }
1562 else {
5dc0d613 1563 if (!o)
a0d0e21e 1564 return;
11343788 1565 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1566 curcop = &compiling;
1567 main_start = LINKLIST(main_root);
1568 main_root->op_next = 0;
1569 peep(main_start);
748a9306 1570 compcv = 0;
3841441e 1571
4fdae800 1572 /* Register with debugger */
84902520 1573 if (PERLDB_INTER) {
3841441e 1574 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1575 if (cv) {
1576 dSP;
924508f0 1577 PUSHMARK(SP);
3841441e
CS		 1578 XPUSHs((SV*)compiling.cop_filegv);
1579 PUTBACK;
1580 perl_call_sv((SV*)cv, G_DISCARD);
1581 }
1582 }
79072805 1583 }
79072805
LW		 1584}
1585
1586OP *
8ac85365 1587localize(OP *o, I32 lex)
79072805
LW		 1588{
1589 if (o->op_flags & OPf_PARENS)
1590 list(o);
8990e307 1591 else {
8990e307
LW		 1592 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1593 char *s;
1594 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1595 if (*s == ';' || *s == '=')
8990e307
LW		 1596 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1597 }
1598 }
93a17b20 1599 in_my = FALSE;
c750a3ec 1600 in_my_stash = Nullhv;
93a17b20
LW		 1601 if (lex)
1602 return my(o);
1603 else
463ee0b2 1604 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1605}
1606
1607OP *
8ac85365 1608jmaybe(OP *o)
79072805
LW		 1609{
1610 if (o->op_type == OP_LIST) {
554b3eca
MB		 1611 OP *o2;
1612#ifdef USE_THREADS
2faa37cc 1613 o2 = newOP(OP_THREADSV, 0);
54b9620d 1614 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1615#else
1616 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1617#endif /* USE_THREADS */
1618 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1619 }
1620 return o;
1621}
1622
1623OP *
8ac85365 1624fold_constants(register OP *o)
79072805 1625{
11343788 1626 dTHR;
79072805
LW		 1627 register OP *curop;
1628 I32 type = o->op_type;
748a9306 1629 SV *sv;
79072805
LW		 1630
1631 if (opargs[type] & OA_RETSCALAR)
1632 scalar(o);
1633 if (opargs[type] & OA_TARGET)
ed6116ce 1634 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1635
85e6fe83 1636 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1637 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1638
79072805
LW		 1639 if (!(opargs[type] & OA_FOLDCONST))
1640 goto nope;
1641
de939608
CS		 1642 switch (type) {
1643 case OP_SPRINTF:
1644 case OP_UCFIRST:
1645 case OP_LCFIRST:
1646 case OP_UC:
1647 case OP_LC:
69dcf70c
MB		 1648 case OP_SLT:
1649 case OP_SGT:
1650 case OP_SLE:
1651 case OP_SGE:
1652 case OP_SCMP:
1653
de939608
CS		 1654 if (o->op_private & OPpLOCALE)
1655 goto nope;
1656 }
1657
a0d0e21e
LW		 1658 if (error_count)
1659 goto nope; /* Don't try to run w/ errors */
1660
79072805 1661 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1662 if (curop->op_type != OP_CONST &&
1663 curop->op_type != OP_LIST &&
1664 curop->op_type != OP_SCALAR &&
a0d0e21e 1665 curop->op_type != OP_NULL &&
93a17b20 1666 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1667 goto nope;
1668 }
1669 }
1670
1671 curop = LINKLIST(o);
1672 o->op_next = 0;
1673 op = curop;
8da795c6 1674 runops();
748a9306
LW		 1675 sv = *(stack_sp--);
1676 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1677 pad_swipe(o->op_targ);
748a9306
LW		 1678 else if (SvTEMP(sv)) { /* grab mortal temp? */
1679 (void)SvREFCNT_inc(sv);
1680 SvTEMP_off(sv);
85e6fe83 1681 }
79072805
LW		 1682 op_free(o);
1683 if (type == OP_RV2GV)
b1cb66bf 1684 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306
LW		 1685 else {
1686 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK) {
1687 IV iv = SvIV(sv);
1688 if ((double)iv == SvNV(sv)) { /* can we smush double to int */
1689 SvREFCNT_dec(sv);
1690 sv = newSViv(iv);
1691 }
b1cb66bf 1692 else
1693 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1694 }
1695 return newSVOP(OP_CONST, 0, sv);
1696 }
aeea060c 1697
79072805
LW		 1698 nope:
1699 if (!(opargs[type] & OA_OTHERINT))
1700 return o;
79072805 1701
85e6fe83 1702 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1703 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1704 return o;
1705
1706 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1707 if (curop->op_type == OP_CONST) {
b1cb66bf 1708 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1709 continue;
1710 return o;
1711 }
1712 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1713 continue;
1714 return o;
1715 }
a0d0e21e 1716 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1717 }
1718
79072805
LW		 1719 return o;
1720}
1721
1722OP *
8ac85365 1723gen_constant_list(register OP *o)
79072805 1724{
11343788 1725 dTHR;
79072805 1726 register OP *curop;
79072805 1727 I32 oldtmps_floor = tmps_floor;
79072805 1728
a0d0e21e
LW		 1729 list(o);
1730 if (error_count)
1731 return o; /* Don't attempt to run with errors */
1732
1733 op = curop = LINKLIST(o);
1734 o->op_next = 0;
11343788 1735 pp_pushmark(ARGS);
8da795c6 1736 runops();
a0d0e21e 1737 op = curop;
11343788 1738 pp_anonlist(ARGS);
79072805 1739 tmps_floor = oldtmps_floor;
79072805
LW		 1740
1741 o->op_type = OP_RV2AV;
1742 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1743 curop = ((UNOP*)o)->op_first;
a0d0e21e 1744 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1745 op_free(curop);
79072805
LW		 1746 linklist(o);
1747 return list(o);
1748}
1749
1750OP *
8ac85365 1751convert(I32 type, I32 flags, OP *o)
79072805
LW		 1752{
1753 OP *kid;
a0d0e21e 1754 OP *last = 0;
79072805 1755
11343788
MB		 1756 if (!o || o->op_type != OP_LIST)
1757 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1758 else
5dc0d613 1759 o->op_flags &= ~OPf_WANT;
79072805 1760
8990e307 1761 if (!(opargs[type] & OA_MARK))
11343788 1762 null(cLISTOPo->op_first);
8990e307 1763
11343788
MB		 1764 o->op_type = type;
1765 o->op_ppaddr = ppaddr[type];
1766 o->op_flags |= flags;
79072805 1767
11343788
MB		 1768 o = CHECKOP(type, o);
1769 if (o->op_type != type)
1770 return o;
79072805 1771
11343788 1772 if (cLISTOPo->op_children < 7) {
79072805 1773 /* XXX do we really need to do this if we're done appending?? */
11343788 1774 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1775 last = kid;
11343788 1776 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1777 }
1778
11343788 1779 return fold_constants(o);
79072805
LW		 1780}
1781
1782/* List constructors */
1783
1784OP *
8ac85365 1785append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1786{
1787 if (!first)
1788 return last;
8990e307
LW		 1789
1790 if (!last)
79072805 1791 return first;
8990e307 1792
a0d0e21e
LW		 1793 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1794 return newLISTOP(type, 0, first, last);
79072805 1795
a0d0e21e
LW		 1796 if (first->op_flags & OPf_KIDS)
1797 ((LISTOP*)first)->op_last->op_sibling = last;
1798 else {
1799 first->op_flags |= OPf_KIDS;
1800 ((LISTOP*)first)->op_first = last;
1801 }
1802 ((LISTOP*)first)->op_last = last;
1803 ((LISTOP*)first)->op_children++;
1804 return first;
79072805
LW		 1805}
1806
1807OP *
8ac85365 1808append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1809{
1810 if (!first)
1811 return (OP*)last;
8990e307
LW		 1812
1813 if (!last)
79072805 1814 return (OP*)first;
8990e307
LW		 1815
1816 if (first->op_type != type)
79072805 1817 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1818
1819 if (last->op_type != type)
79072805
LW		 1820 return append_elem(type, (OP*)first, (OP*)last);
1821
1822 first->op_last->op_sibling = last->op_first;
1823 first->op_last = last->op_last;
1824 first->op_children += last->op_children;
1825 if (first->op_children)
1826 last->op_flags |= OPf_KIDS;
1827
1828 Safefree(last);
1829 return (OP*)first;
1830}
1831
1832OP *
8ac85365 1833prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1834{
1835 if (!first)
1836 return last;
8990e307
LW		 1837
1838 if (!last)
79072805 1839 return first;
8990e307
LW		 1840
1841 if (last->op_type == type) {
1842 if (type == OP_LIST) { /* already a PUSHMARK there */
1843 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1844 ((LISTOP*)last)->op_first->op_sibling = first;
1845 }
1846 else {
1847 if (!(last->op_flags & OPf_KIDS)) {
1848 ((LISTOP*)last)->op_last = first;
1849 last->op_flags |= OPf_KIDS;
1850 }
1851 first->op_sibling = ((LISTOP*)last)->op_first;
1852 ((LISTOP*)last)->op_first = first;
79072805 1853 }
79072805
LW		 1854 ((LISTOP*)last)->op_children++;
1855 return last;
1856 }
1857
1858 return newLISTOP(type, 0, first, last);
1859}
1860
1861/* Constructors */
1862
1863OP *
8ac85365 1864newNULLLIST(void)
79072805 1865{
8990e307
LW		 1866 return newOP(OP_STUB, 0);
1867}
1868
1869OP *
8ac85365 1870force_list(OP *o)
8990e307 1871{
11343788
MB		 1872 if (!o || o->op_type != OP_LIST)
1873 o = newLISTOP(OP_LIST, 0, o, Nullop);
1874 null(o);
1875 return o;
79072805
LW		 1876}
1877
1878OP *
8ac85365 1879newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1880{
1881 LISTOP *listop;
1882
1883 Newz(1101, listop, 1, LISTOP);
1884
1885 listop->op_type = type;
1886 listop->op_ppaddr = ppaddr[type];
1887 listop->op_children = (first != 0) + (last != 0);
1888 listop->op_flags = flags;
79072805
LW		 1889
1890 if (!last && first)
1891 last = first;
1892 else if (!first && last)
1893 first = last;
8990e307
LW		 1894 else if (first)
1895 first->op_sibling = last;
79072805
LW		 1896 listop->op_first = first;
1897 listop->op_last = last;
8990e307
LW		 1898 if (type == OP_LIST) {
1899 OP* pushop;
1900 pushop = newOP(OP_PUSHMARK, 0);
1901 pushop->op_sibling = first;
1902 listop->op_first = pushop;
1903 listop->op_flags |= OPf_KIDS;
1904 if (!last)
1905 listop->op_last = pushop;
1906 }
1907 else if (listop->op_children)
1908 listop->op_flags |= OPf_KIDS;
79072805
LW		 1909
1910 return (OP*)listop;
1911}
1912
1913OP *
8ac85365 1914newOP(I32 type, I32 flags)
79072805 1915{
11343788
MB		 1916 OP *o;
1917 Newz(1101, o, 1, OP);
1918 o->op_type = type;
1919 o->op_ppaddr = ppaddr[type];
1920 o->op_flags = flags;
79072805 1921
11343788
MB		 1922 o->op_next = o;
1923 o->op_private = 0 + (flags >> 8);
79072805 1924 if (opargs[type] & OA_RETSCALAR)
11343788 1925 scalar(o);
79072805 1926 if (opargs[type] & OA_TARGET)
11343788
MB		 1927 o->op_targ = pad_alloc(type, SVs_PADTMP);
1928 return CHECKOP(type, o);
79072805
LW		 1929}
1930
1931OP *
8ac85365 1932newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1933{
1934 UNOP *unop;
1935
93a17b20 1936 if (!first)
aeea060c 1937 first = newOP(OP_STUB, 0);
8990e307
LW		 1938 if (opargs[type] & OA_MARK)
1939 first = force_list(first);
93a17b20 1940
79072805
LW		 1941 Newz(1101, unop, 1, UNOP);
1942 unop->op_type = type;
1943 unop->op_ppaddr = ppaddr[type];
1944 unop->op_first = first;
1945 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1946 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1947#if 1
1948 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1949 first->op_type = OP_PUSHRE;
1950 first->op_ppaddr = ppaddr[OP_PUSHRE];
1951 }
1952#endif
e50aee73 1953 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1954 if (unop->op_next)
1955 return (OP*)unop;
1956
a0d0e21e 1957 return fold_constants((OP *) unop);
79072805
LW		 1958}
1959
1960OP *
8ac85365 1961newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1962{
1963 BINOP *binop;
1964 Newz(1101, binop, 1, BINOP);
1965
1966 if (!first)
1967 first = newOP(OP_NULL, 0);
1968
1969 binop->op_type = type;
1970 binop->op_ppaddr = ppaddr[type];
1971 binop->op_first = first;
1972 binop->op_flags = flags | OPf_KIDS;
1973 if (!last) {
1974 last = first;
c07a80fd 1975 binop->op_private = 1 | (flags >> 8);
79072805
LW		 1976 }
1977 else {
c07a80fd 1978 binop->op_private = 2 | (flags >> 8);
79072805
LW		 1979 first->op_sibling = last;
1980 }
1981
e50aee73 1982 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 1983 if (binop->op_next)
1984 return (OP*)binop;
1985
1986 binop->op_last = last = binop->op_first->op_sibling;
1987
a0d0e21e 1988 return fold_constants((OP *)binop);
79072805
LW		 1989}
1990
1991OP *
8ac85365 1992pmtrans(OP *o, OP *expr, OP *repl)
79072805 1993{
79072805
LW		 1994 SV *tstr = ((SVOP*)expr)->op_sv;
1995 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 1996 STRLEN tlen;
1997 STRLEN rlen;
ec49126f 1998 register U8 *t = (U8*)SvPV(tstr, tlen);
1999 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2000 register I32 i;
2001 register I32 j;
8ac85365 2002 I32 Delete;
79072805 2003 I32 complement;
5d06d08e 2004 I32 squash;
79072805
LW		 2005 register short *tbl;
2006
11343788
MB		 2007 tbl = (short*)cPVOPo->op_pv;
2008 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 2009 Delete = o->op_private & OPpTRANS_DELETE;
5d06d08e 2010 squash = o->op_private & OPpTRANS_SQUASH;
79072805
LW		 2011
2012 if (complement) {
2013 Zero(tbl, 256, short);
2014 for (i = 0; i < tlen; i++)
ec49126f 2015 tbl[t[i]] = -1;
79072805
LW		 2016 for (i = 0, j = 0; i < 256; i++) {
2017 if (!tbl[i]) {
2018 if (j >= rlen) {
8ac85365 2019 if (Delete)
79072805
LW		 2020 tbl[i] = -2;
2021 else if (rlen)
ec49126f 2022 tbl[i] = r[j-1];
79072805
LW		 2023 else
2024 tbl[i] = i;
2025 }
2026 else
ec49126f 2027 tbl[i] = r[j++];
79072805
LW		 2028 }
2029 }
2030 }
2031 else {
8ac85365 2032 if (!rlen && !Delete) {
79072805 2033 r = t; rlen = tlen;
5d06d08e
MB		 2034 if (!squash)
2035 o->op_private |= OPpTRANS_COUNTONLY;
79072805
LW		 2036 }
2037 for (i = 0; i < 256; i++)
2038 tbl[i] = -1;
2039 for (i = 0, j = 0; i < tlen; i++,j++) {
2040 if (j >= rlen) {
8ac85365 2041 if (Delete) {
ec49126f 2042 if (tbl[t[i]] == -1)
2043 tbl[t[i]] = -2;
79072805
LW		 2044 continue;
2045 }
2046 --j;
2047 }
ec49126f 2048 if (tbl[t[i]] == -1)
2049 tbl[t[i]] = r[j];
79072805
LW		 2050 }
2051 }
2052 op_free(expr);
2053 op_free(repl);
2054
11343788 2055 return o;
79072805
LW		 2056}
2057
2058OP *
8ac85365 2059newPMOP(I32 type, I32 flags)
79072805 2060{
11343788 2061 dTHR;
79072805
LW		 2062 PMOP *pmop;
2063
2064 Newz(1101, pmop, 1, PMOP);
2065 pmop->op_type = type;
2066 pmop->op_ppaddr = ppaddr[type];
2067 pmop->op_flags = flags;
c07a80fd 2068 pmop->op_private = 0 | (flags >> 8);
79072805 2069
36477c24 2070 if (hints & HINT_LOCALE)
2071 pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE);
2072
79072805 2073 /* link into pm list */
a0d0e21e 2074 if (type != OP_TRANS && curstash) {
79072805
LW		 2075 pmop->op_pmnext = HvPMROOT(curstash);
2076 HvPMROOT(curstash) = pmop;
2077 }
2078
2079 return (OP*)pmop;
2080}
2081
2082OP *
8ac85365 2083pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2084{
2085 PMOP *pm;
2086 LOGOP *rcop;
2087
11343788
MB		 2088 if (o->op_type == OP_TRANS)
2089 return pmtrans(o, expr, repl);
79072805 2090
3e3baf6d 2091 hints |= HINT_BLOCK_SCOPE;
11343788 2092 pm = (PMOP*)o;
79072805
LW		 2093
2094 if (expr->op_type == OP_CONST) {
463ee0b2 2095 STRLEN plen;
79072805 2096 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2097 char *p = SvPV(pat, plen);
11343788 2098 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2099 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2100 p = SvPV(pat, plen);
79072805
LW		 2101 pm->op_pmflags |= PMf_SKIPWHITE;
2102 }
e50aee73 2103 pm->op_pmregexp = pregcomp(p, p + plen, pm);
aeea060c 2104 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2105 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2106 op_free(expr);
2107 }
2108 else {
463ee0b2
LW		 2109 if (pm->op_pmflags & PMf_KEEP)
2110 expr = newUNOP(OP_REGCMAYBE,0,expr);
2111
79072805
LW		 2112 Newz(1101, rcop, 1, LOGOP);
2113 rcop->op_type = OP_REGCOMP;
2114 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2115 rcop->op_first = scalar(expr);
2116 rcop->op_flags |= OPf_KIDS;
2117 rcop->op_private = 1;
11343788 2118 rcop->op_other = o;
79072805
LW		 2119
2120 /* establish postfix order */
463ee0b2
LW		 2121 if (pm->op_pmflags & PMf_KEEP) {
2122 LINKLIST(expr);
2123 rcop->op_next = expr;
2124 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2125 }
2126 else {
2127 rcop->op_next = LINKLIST(expr);
2128 expr->op_next = (OP*)rcop;
2129 }
79072805 2130
11343788 2131 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2132 }
2133
2134 if (repl) {
748a9306
LW		 2135 OP *curop;
2136 if (pm->op_pmflags & PMf_EVAL)
2137 curop = 0;
554b3eca 2138#ifdef USE_THREADS
2faa37cc 2139 else if (repl->op_type == OP_THREADSV
554b3eca 2140 && strchr("&`'123456789+",
54b9620d 2141 threadsv_names[repl->op_targ]))
554b3eca
MB		 2142 {
2143 curop = 0;
2144 }
2145#endif /* USE_THREADS */
748a9306
LW		 2146 else if (repl->op_type == OP_CONST)
2147 curop = repl;
79072805 2148 else {
79072805
LW		 2149 OP *lastop = 0;
2150 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2151 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2152#ifdef USE_THREADS
2faa37cc 2153 if (curop->op_type == OP_THREADSV
554b3eca
MB		 2154 && strchr("&`'123456789+", curop->op_private)) {
2155 break;
2156 }
2157#else
79072805
LW		 2158 if (curop->op_type == OP_GV) {
2159 GV *gv = ((GVOP*)curop)->op_gv;
93a17b20 2160 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2161 break;
2162 }
554b3eca 2163#endif /* USE_THREADS */
79072805
LW		 2164 else if (curop->op_type == OP_RV2CV)
2165 break;
2166 else if (curop->op_type == OP_RV2SV ||
2167 curop->op_type == OP_RV2AV ||
2168 curop->op_type == OP_RV2HV ||
2169 curop->op_type == OP_RV2GV) {
2170 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2171 break;
2172 }
748a9306
LW		 2173 else if (curop->op_type == OP_PADSV ||
2174 curop->op_type == OP_PADAV ||
2175 curop->op_type == OP_PADHV ||
554b3eca 2176 curop->op_type == OP_PADANY) {
748a9306
LW		 2177 /* is okay */
2178 }
79072805
LW		 2179 else
2180 break;
2181 }
2182 lastop = curop;
2183 }
748a9306
LW		 2184 }
2185 if (curop == repl) {
2186 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2187 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2188 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2189 }
2190 else {
2191 Newz(1101, rcop, 1, LOGOP);
2192 rcop->op_type = OP_SUBSTCONT;
2193 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2194 rcop->op_first = scalar(repl);
2195 rcop->op_flags |= OPf_KIDS;
2196 rcop->op_private = 1;
11343788 2197 rcop->op_other = o;
748a9306
LW		 2198
2199 /* establish postfix order */
2200 rcop->op_next = LINKLIST(repl);
2201 repl->op_next = (OP*)rcop;
2202
2203 pm->op_pmreplroot = scalar((OP*)rcop);
2204 pm->op_pmreplstart = LINKLIST(rcop);
2205 rcop->op_next = 0;
79072805
LW		 2206 }
2207 }
2208
2209 return (OP*)pm;
2210}
2211
2212OP *
8ac85365 2213newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2214{
2215 SVOP *svop;
2216 Newz(1101, svop, 1, SVOP);
2217 svop->op_type = type;
2218 svop->op_ppaddr = ppaddr[type];
2219 svop->op_sv = sv;
2220 svop->op_next = (OP*)svop;
2221 svop->op_flags = flags;
2222 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2223 scalar((OP*)svop);
79072805 2224 if (opargs[type] & OA_TARGET)
ed6116ce 2225 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2226 return CHECKOP(type, svop);
79072805
LW		 2227}
2228
2229OP *
8ac85365 2230newGVOP(I32 type, I32 flags, GV *gv)
79072805 2231{
11343788 2232 dTHR;
79072805
LW		 2233 GVOP *gvop;
2234 Newz(1101, gvop, 1, GVOP);
2235 gvop->op_type = type;
2236 gvop->op_ppaddr = ppaddr[type];
8990e307 2237 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2238 gvop->op_next = (OP*)gvop;
2239 gvop->op_flags = flags;
2240 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2241 scalar((OP*)gvop);
79072805 2242 if (opargs[type] & OA_TARGET)
ed6116ce 2243 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2244 return CHECKOP(type, gvop);
79072805
LW		 2245}
2246
2247OP *
8ac85365 2248newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2249{
2250 PVOP *pvop;
2251 Newz(1101, pvop, 1, PVOP);
2252 pvop->op_type = type;
2253 pvop->op_ppaddr = ppaddr[type];
2254 pvop->op_pv = pv;
2255 pvop->op_next = (OP*)pvop;
2256 pvop->op_flags = flags;
2257 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2258 scalar((OP*)pvop);
79072805 2259 if (opargs[type] & OA_TARGET)
ed6116ce 2260 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2261 return CHECKOP(type, pvop);
79072805
LW		 2262}
2263
79072805 2264void
8ac85365 2265package(OP *o)
79072805 2266{
11343788 2267 dTHR;
93a17b20 2268 SV *sv;
79072805
LW		 2269
2270 save_hptr(&curstash);
2271 save_item(curstname);
11343788 2272 if (o) {
463ee0b2
LW		 2273 STRLEN len;
2274 char *name;
11343788 2275 sv = cSVOPo->op_sv;
463ee0b2 2276 name = SvPV(sv, len);
b1cb66bf 2277 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2278 sv_setpvn(curstname, name, len);
11343788 2279 op_free(o);
93a17b20
LW		 2280 }
2281 else {
2282 sv_setpv(curstname,"<none>");
2283 curstash = Nullhv;
2284 }
79072805 2285 copline = NOLINE;
8990e307 2286 expect = XSTATE;
79072805
LW		 2287}
2288
85e6fe83 2289void
8ac85365 2290utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2291{
a0d0e21e
LW		 2292 OP *pack;
2293 OP *meth;
2294 OP *rqop;
2295 OP *imop;
b1cb66bf 2296 OP *veop;
85e6fe83 2297
a0d0e21e
LW		 2298 if (id->op_type != OP_CONST)
2299 croak("Module name must be constant");
85e6fe83 2300
b1cb66bf 2301 veop = Nullop;
2302
2303 if(version != Nullop) {
2304 SV *vesv = ((SVOP*)version)->op_sv;
2305
2306 if (arg == Nullop && !SvNIOK(vesv)) {
2307 arg = version;
2308 }
2309 else {
2310 OP *pack;
2311 OP *meth;
2312
2313 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2314 croak("Version number must be constant number");
2315
2316 /* Make copy of id so we don't free it twice */
2317 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2318
2319 /* Fake up a method call to VERSION */
2320 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2321 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2322 append_elem(OP_LIST,
2323 prepend_elem(OP_LIST, pack, list(version)),
2324 newUNOP(OP_METHOD, 0, meth)));
2325 }
2326 }
aeea060c 2327
a0d0e21e 2328 /* Fake up an import/unimport */
4633a7c4
LW		 2329 if (arg && arg->op_type == OP_STUB)
2330 imop = arg; /* no import on explicit () */
b1cb66bf 2331 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2332 imop = Nullop; /* use 5.0; */
2333 }
4633a7c4
LW		 2334 else {
2335 /* Make copy of id so we don't free it twice */
2336 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2337 meth = newSVOP(OP_CONST, 0,
2338 aver
2339 ? newSVpv("import", 6)
2340 : newSVpv("unimport", 8)
2341 );
2342 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2343 append_elem(OP_LIST,
2344 prepend_elem(OP_LIST, pack, list(arg)),
2345 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2346 }
2347
2348 /* Fake up a require */
2349 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2350
2351 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2352 newSUB(floor,
a0d0e21e 2353 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2354 Nullop,
a0d0e21e 2355 append_elem(OP_LINESEQ,
b1cb66bf 2356 append_elem(OP_LINESEQ,
2357 newSTATEOP(0, Nullch, rqop),
2358 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2359 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2360
85e6fe83
LW		 2361 copline = NOLINE;
2362 expect = XSTATE;
2363}
2364
79072805 2365OP *
8ac85365 2366newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2367{
2368 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2369 list(force_list(subscript)),
2370 list(force_list(listval)) );
79072805
LW		 2371}
2372
2373static I32
8ac85365 2374list_assignment(register OP *o)
79072805 2375{
11343788 2376 if (!o)
79072805
LW		 2377 return TRUE;
2378
11343788
MB		 2379 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2380 o = cUNOPo->op_first;
79072805 2381
11343788
MB		 2382 if (o->op_type == OP_COND_EXPR) {
2383 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2384 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2385
2386 if (t && f)
2387 return TRUE;
2388 if (t || f)
2389 yyerror("Assignment to both a list and a scalar");
2390 return FALSE;
2391 }
2392
11343788
MB		 2393 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2394 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2395 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2396 return TRUE;
2397
11343788 2398 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2399 return TRUE;
2400
11343788 2401 if (o->op_type == OP_RV2SV)
79072805
LW		 2402 return FALSE;
2403
2404 return FALSE;
2405}
2406
2407OP *
8ac85365 2408newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2409{
11343788 2410 OP *o;
79072805 2411
a0d0e21e
LW		 2412 if (optype) {
2413 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2414 return newLOGOP(optype, 0,
2415 mod(scalar(left), optype),
2416 newUNOP(OP_SASSIGN, 0, scalar(right)));
2417 }
2418 else {
2419 return newBINOP(optype, OPf_STACKED,
2420 mod(scalar(left), optype), scalar(right));
2421 }
2422 }
2423
79072805 2424 if (list_assignment(left)) {
463ee0b2 2425 modcount = 0;
748a9306 2426 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2427 left = mod(left, OP_AASSIGN);
748a9306
LW		 2428 if (eval_start)
2429 eval_start = 0;
2430 else {
a0d0e21e
LW		 2431 op_free(left);
2432 op_free(right);
2433 return Nullop;
2434 }
11343788 2435 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2436 list(force_list(right)),
2437 list(force_list(left)) );
11343788 2438 o->op_private = 0 | (flags >> 8);
a0d0e21e 2439 if (!(left->op_private & OPpLVAL_INTRO)) {
748a9306 2440 static int generation = 100;
79072805 2441 OP *curop;
11343788 2442 OP *lastop = o;
79072805 2443 generation++;
11343788 2444 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2445 if (opargs[curop->op_type] & OA_DANGEROUS) {
2446 if (curop->op_type == OP_GV) {
2447 GV *gv = ((GVOP*)curop)->op_gv;
2448 if (gv == defgv || SvCUR(gv) == generation)
2449 break;
2450 SvCUR(gv) = generation;
2451 }
748a9306
LW		 2452 else if (curop->op_type == OP_PADSV ||
2453 curop->op_type == OP_PADAV ||
2454 curop->op_type == OP_PADHV ||
2455 curop->op_type == OP_PADANY) {
2456 SV **svp = AvARRAY(comppad_name);
8e07c86e 2457 SV *sv = svp[curop->op_targ];
748a9306
LW		 2458 if (SvCUR(sv) == generation)
2459 break;
2460 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2461 }
79072805
LW		 2462 else if (curop->op_type == OP_RV2CV)
2463 break;
2464 else if (curop->op_type == OP_RV2SV ||
2465 curop->op_type == OP_RV2AV ||
2466 curop->op_type == OP_RV2HV ||
2467 curop->op_type == OP_RV2GV) {
2468 if (lastop->op_type != OP_GV) /* funny deref? */
2469 break;
2470 }
2471 else
2472 break;
2473 }
2474 lastop = curop;
2475 }
11343788
MB		 2476 if (curop != o)
2477 o->op_private = OPpASSIGN_COMMON;
79072805 2478 }
c07a80fd 2479 if (right && right->op_type == OP_SPLIT) {
2480 OP* tmpop;
2481 if ((tmpop = ((LISTOP*)right)->op_first) &&
2482 tmpop->op_type == OP_PUSHRE)
2483 {
2484 PMOP *pm = (PMOP*)tmpop;
2485 if (left->op_type == OP_RV2AV &&
2486 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2487 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2488 {
2489 tmpop = ((UNOP*)left)->op_first;
2490 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2491 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2492 pm->op_pmflags |= PMf_ONCE;
11343788 2493 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2494 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2495 tmpop->op_sibling = Nullop; /* don't free split */
2496 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2497 op_free(o); /* blow off assign */
54310121 2498 right->op_flags &= ~OPf_WANT;
a5f75d66 2499 /* "I don't know and I don't care." */
c07a80fd 2500 return right;
2501 }
2502 }
2503 else {
2504 if (modcount < 10000 &&
2505 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2506 {
2507 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2508 if (SvIVX(sv) == 0)
2509 sv_setiv(sv, modcount+1);
2510 }
2511 }
2512 }
2513 }
11343788 2514 return o;
79072805
LW		 2515 }
2516 if (!right)
2517 right = newOP(OP_UNDEF, 0);
2518 if (right->op_type == OP_READLINE) {
2519 right->op_flags |= OPf_STACKED;
463ee0b2 2520 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2521 }
a0d0e21e 2522 else {
748a9306 2523 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2524 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2525 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2526 if (eval_start)
2527 eval_start = 0;
2528 else {
11343788 2529 op_free(o);
a0d0e21e
LW		 2530 return Nullop;
2531 }
2532 }
11343788 2533 return o;
79072805
LW		 2534}
2535
2536OP *
8ac85365 2537newSTATEOP(I32 flags, char *label, OP *o)
79072805 2538{
11343788 2539 dTHR;
bbce6d69 2540 U32 seq = intro_my();
79072805
LW		 2541 register COP *cop;
2542
2543 Newz(1101, cop, 1, COP);
84902520 2544 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2545 cop->op_type = OP_DBSTATE;
2546 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2547 }
2548 else {
2549 cop->op_type = OP_NEXTSTATE;
2550 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2551 }
79072805 2552 cop->op_flags = flags;
c07a80fd 2553 cop->op_private = 0 | (flags >> 8);
ff0cee69 2554#ifdef NATIVE_HINTS
2555 cop->op_private |= NATIVE_HINTS;
2556#endif
79072805
LW		 2557 cop->op_next = (OP*)cop;
2558
463ee0b2
LW		 2559 if (label) {
2560 cop->cop_label = label;
85e6fe83 2561 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2562 }
bbce6d69 2563 cop->cop_seq = seq;
a0d0e21e 2564 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2565
2566 if (copline == NOLINE)
2567 cop->cop_line = curcop->cop_line;
2568 else {
2569 cop->cop_line = copline;
2570 copline = NOLINE;
2571 }
44a8e56a 2572 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2573 cop->cop_stash = curstash;
2574
84902520 2575 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2576 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2577 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2578 (void)SvIOK_on(*svp);
a5f75d66 2579 SvIVX(*svp) = 1;
93a17b20
LW		 2580 SvSTASH(*svp) = (HV*)cop;
2581 }
2582 }
2583
11343788 2584 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2585}
2586
bbce6d69 2587/* "Introduce" my variables to visible status. */
2588U32
8ac85365 2589intro_my(void)
bbce6d69 2590{
2591 SV **svp;
2592 SV *sv;
2593 I32 i;
2594
2595 if (! min_intro_pending)
2596 return cop_seqmax;
2597
2598 svp = AvARRAY(comppad_name);
2599 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2600 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2601 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2602 SvNVX(sv) = (double)cop_seqmax;
2603 }
2604 }
2605 min_intro_pending = 0;
2606 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2607 return cop_seqmax++;
2608}
2609
79072805 2610OP *
8ac85365 2611newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2612{
883ffac3
CS		 2613 return new_logop(type, flags, &first, &other);
2614}
2615
2616static OP *
2617new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2618{
11343788 2619 dTHR;
79072805 2620 LOGOP *logop;
11343788 2621 OP *o;
883ffac3
CS		 2622 OP *first = *firstp;
2623 OP *other = *otherp;
79072805 2624
a0d0e21e
LW		 2625 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2626 return newBINOP(type, flags, scalar(first), scalar(other));
2627
8990e307 2628 scalarboolean(first);
79072805
LW		 2629 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2630 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2631 if (type == OP_AND || type == OP_OR) {
2632 if (type == OP_AND)
2633 type = OP_OR;
2634 else
2635 type = OP_AND;
11343788 2636 o = first;
883ffac3 2637 first = *firstp = cUNOPo->op_first;
11343788
MB		 2638 if (o->op_next)
2639 first->op_next = o->op_next;
2640 cUNOPo->op_first = Nullop;
2641 op_free(o);
79072805
LW		 2642 }
2643 }
2644 if (first->op_type == OP_CONST) {
93a17b20 2645 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2646 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2647 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2648 op_free(first);
883ffac3 2649 *firstp = Nullop;
79072805
LW		 2650 return other;
2651 }
2652 else {
2653 op_free(other);
883ffac3 2654 *otherp = Nullop;
79072805
LW		 2655 return first;
2656 }
2657 }
2658 else if (first->op_type == OP_WANTARRAY) {
2659 if (type == OP_AND)
2660 list(other);
2661 else
2662 scalar(other);
2663 }
a6006777 2664 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2665 OP *k1 = ((UNOP*)first)->op_first;
2666 OP *k2 = k1->op_sibling;
2667 OPCODE warnop = 0;
2668 switch (first->op_type)
2669 {
2670 case OP_NULL:
2671 if (k2 && k2->op_type == OP_READLINE
2672 && (k2->op_flags & OPf_STACKED)
2673 && (k1->op_type == OP_RV2SV || k1->op_type == OP_PADSV))
2674 warnop = k2->op_type;
2675 break;
2676
2677 case OP_SASSIGN:
68dc0745 2678 if (k1->op_type == OP_READDIR
2679 || k1->op_type == OP_GLOB
2680 || k1->op_type == OP_EACH)
a6006777 2681 warnop = k1->op_type;
2682 break;
2683 }
8ebc5c01 2684 if (warnop) {
2685 line_t oldline = curcop->cop_line;
2686 curcop->cop_line = copline;
68dc0745 2687 warn("Value of %s%s can be \"0\"; test with defined()",
2688 op_desc[warnop],
2689 ((warnop == OP_READLINE || warnop == OP_GLOB)
2690 ? " construct" : "() operator"));
2691 curcop->cop_line = oldline;
8ebc5c01 2692 }
a6006777 2693 }
79072805
LW		 2694
2695 if (!other)
2696 return first;
2697
a0d0e21e
LW		 2698 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2699 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2700
79072805
LW		 2701 Newz(1101, logop, 1, LOGOP);
2702
2703 logop->op_type = type;
2704 logop->op_ppaddr = ppaddr[type];
2705 logop->op_first = first;
2706 logop->op_flags = flags | OPf_KIDS;
2707 logop->op_other = LINKLIST(other);
c07a80fd 2708 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2709
2710 /* establish postfix order */
2711 logop->op_next = LINKLIST(first);
2712 first->op_next = (OP*)logop;
2713 first->op_sibling = other;
2714
11343788
MB		 2715 o = newUNOP(OP_NULL, 0, (OP*)logop);
2716 other->op_next = o;
79072805 2717
11343788 2718 return o;
79072805
LW		 2719}
2720
2721OP *
8ac85365 2722newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2723{
11343788 2724 dTHR;
79072805 2725 CONDOP *condop;
11343788 2726 OP *o;
79072805 2727
b1cb66bf 2728 if (!falseop)
2729 return newLOGOP(OP_AND, 0, first, trueop);
2730 if (!trueop)
2731 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2732
8990e307 2733 scalarboolean(first);
79072805
LW		 2734 if (first->op_type == OP_CONST) {
2735 if (SvTRUE(((SVOP*)first)->op_sv)) {
2736 op_free(first);
b1cb66bf 2737 op_free(falseop);
2738 return trueop;
79072805
LW		 2739 }
2740 else {
2741 op_free(first);
b1cb66bf 2742 op_free(trueop);
2743 return falseop;
79072805
LW		 2744 }
2745 }
2746 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2747 list(trueop);
2748 scalar(falseop);
79072805
LW		 2749 }
2750 Newz(1101, condop, 1, CONDOP);
2751
2752 condop->op_type = OP_COND_EXPR;
2753 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2754 condop->op_first = first;
2755 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2756 condop->op_true = LINKLIST(trueop);
2757 condop->op_false = LINKLIST(falseop);
c07a80fd 2758 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2759
2760 /* establish postfix order */
2761 condop->op_next = LINKLIST(first);
2762 first->op_next = (OP*)condop;
2763
b1cb66bf 2764 first->op_sibling = trueop;
2765 trueop->op_sibling = falseop;
11343788 2766 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2767
5dc0d613
MB		 2768 trueop->op_next = o;
2769 falseop->op_next = o;
79072805 2770
11343788 2771 return o;
79072805
LW		 2772}
2773
2774OP *
8ac85365 2775newRANGE(I32 flags, OP *left, OP *right)
79072805 2776{
b35b2403 2777 dTHR;
79072805
LW		 2778 CONDOP *condop;
2779 OP *flip;
2780 OP *flop;
11343788 2781 OP *o;
79072805
LW		 2782
2783 Newz(1101, condop, 1, CONDOP);
2784
2785 condop->op_type = OP_RANGE;
2786 condop->op_ppaddr = ppaddr[OP_RANGE];
2787 condop->op_first = left;
2788 condop->op_flags = OPf_KIDS;
2789 condop->op_true = LINKLIST(left);
2790 condop->op_false = LINKLIST(right);
c07a80fd 2791 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2792
2793 left->op_sibling = right;
2794
2795 condop->op_next = (OP*)condop;
2796 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2797 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2798 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2799 linklist(flop);
2800
2801 left->op_next = flip;
2802 right->op_next = flop;
2803
ed6116ce 2804 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2805 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2806 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2807 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2808
2809 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2810 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2811
11343788 2812 flip->op_next = o;
79072805 2813 if (!flip->op_private || !flop->op_private)
11343788 2814 linklist(o); /* blow off optimizer unless constant */
79072805 2815
11343788 2816 return o;
79072805
LW		 2817}
2818
2819OP *
8ac85365 2820newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2821{
11343788 2822 dTHR;
463ee0b2 2823 OP* listop;
11343788 2824 OP* o;
463ee0b2 2825 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2826 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2827
463ee0b2
LW		 2828 if (expr) {
2829 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2830 return block; /* do {} while 0 does once */
fb73857a 2831 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2832 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2833 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2834 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
774d564b 2835 }
463ee0b2 2836 }
93a17b20 2837
8990e307 2838 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 2839 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 2840
883ffac3
CS		 2841 if (listop)
2842 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2843
11343788
MB		 2844 if (once && o != listop)
2845 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2846
11343788
MB		 2847 if (o == listop)
2848 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2849
11343788
MB		 2850 o->op_flags |= flags;
2851 o = scope(o);
2852 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2853 return o;
79072805
LW		 2854}
2855
2856OP *
8ac85365 2857newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2858{
11343788 2859 dTHR;
79072805
LW		 2860 OP *redo;
2861 OP *next = 0;
2862 OP *listop;
11343788 2863 OP *o;
79072805
LW		 2864 OP *condop;
2865
fb73857a 2866 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2867 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2868 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2869 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
748a9306 2870 }
79072805
LW		 2871
2872 if (!block)
2873 block = newOP(OP_NULL, 0);
2874
2875 if (cont)
2876 next = LINKLIST(cont);
fb73857a 2877 if (expr) {
79072805 2878 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2879 if ((line_t)whileline != NOLINE) {
2880 copline = whileline;
2881 cont = append_elem(OP_LINESEQ, cont,
2882 newSTATEOP(0, Nullch, Nullop));
2883 }
2884 }
79072805 2885
463ee0b2 2886 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2887 redo = LINKLIST(listop);
2888
2889 if (expr) {
883ffac3
CS		 2890 copline = whileline;
2891 scalar(listop);
2892 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 2893 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2894 op_free(expr); /* oops, it's a while (0) */
463ee0b2 2895 op_free((OP*)loop);
883ffac3 2896 return Nullop; /* listop already freed by new_logop */
463ee0b2 2897 }
883ffac3
CS		 2898 if (listop)
2899 ((LISTOP*)listop)->op_last->op_next = condop =
2900 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2901 if (!next)
2902 next = condop;
2903 }
2904 else
11343788 2905 o = listop;
79072805
LW		 2906
2907 if (!loop) {
2908 Newz(1101,loop,1,LOOP);
2909 loop->op_type = OP_ENTERLOOP;
2910 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2911 loop->op_private = 0;
2912 loop->op_next = (OP*)loop;
2913 }
2914
11343788 2915 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 2916
2917 loop->op_redoop = redo;
11343788 2918 loop->op_lastop = o;
79072805
LW		 2919
2920 if (next)
2921 loop->op_nextop = next;
2922 else
11343788 2923 loop->op_nextop = o;
79072805 2924
11343788
MB		 2925 o->op_flags |= flags;
2926 o->op_private |= (flags >> 8);
2927 return o;
79072805
LW		 2928}
2929
2930OP *
8990e307 2931newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 2932{
2933 LOOP *loop;
fb73857a 2934 OP *wop;
85e6fe83 2935 int padoff = 0;
4633a7c4 2936 I32 iterflags = 0;
79072805 2937
79072805 2938 if (sv) {
85e6fe83 2939 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 2940 sv->op_type = OP_RV2GV;
2941 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 2942 }
85e6fe83
LW		 2943 else if (sv->op_type == OP_PADSV) { /* private variable */
2944 padoff = sv->op_targ;
2945 op_free(sv);
2946 sv = Nullop;
2947 }
54b9620d
MB		 2948 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
2949 padoff = sv->op_targ;
2950 iterflags |= OPf_SPECIAL;
2951 op_free(sv);
2952 sv = Nullop;
2953 }
79072805 2954 else
c07a80fd 2955 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 2956 }
2957 else {
54b9620d
MB		 2958#ifdef USE_THREADS
2959 padoff = find_threadsv("_");
2960 iterflags |= OPf_SPECIAL;
2961#else
79072805 2962 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 2963#endif
79072805 2964 }
5f05dabc 2965 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
4633a7c4
LW		 2966 expr = scalar(ref(expr, OP_ITER));
2967 iterflags |= OPf_STACKED;
2968 }
2969 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
a0d0e21e
LW		 2970 append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART),
2971 scalar(sv))));
85e6fe83
LW		 2972 assert(!loop->op_next);
2973 Renew(loop, 1, LOOP);
2974 loop->op_targ = padoff;
fb73857a 2975 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
2976 copline = forline;
2977 return newSTATEOP(0, label, wop);
79072805
LW		 2978}
2979
8990e307 2980OP*
8ac85365 2981newLOOPEX(I32 type, OP *label)
8990e307 2982{
11343788
MB		 2983 dTHR;
2984 OP *o;
8990e307 2985 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 2986 /* "last()" means "last" */
2987 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
2988 o = newOP(type, OPf_SPECIAL);
2989 else {
2990 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2991 ? SvPVx(((SVOP*)label)->op_sv, na)
2992 : ""));
2993 }
8990e307
LW		 2994 op_free(label);
2995 }
2996 else {
a0d0e21e
LW		 2997 if (label->op_type == OP_ENTERSUB)
2998 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 2999 o = newUNOP(type, OPf_STACKED, label);
8990e307 3000 }
85e6fe83 3001 hints |= HINT_BLOCK_SCOPE;
11343788 3002 return o;
8990e307
LW		 3003}
3004
79072805 3005void
8ac85365 3006cv_undef(CV *cv)
79072805 3007{
11343788
MB		 3008 dTHR;
3009#ifdef USE_THREADS
e858de61
MB		 3010 if (CvMUTEXP(cv)) {
3011 MUTEX_DESTROY(CvMUTEXP(cv));
3012 Safefree(CvMUTEXP(cv));
3013 CvMUTEXP(cv) = 0;
3014 }
11343788
MB		 3015#endif /* USE_THREADS */
3016
a0d0e21e 3017 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3018#ifdef USE_THREADS
3019 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3020 croak("Can't undef active subroutine");
3021#else
a0d0e21e
LW		 3022 if (CvDEPTH(cv))
3023 croak("Can't undef active subroutine");
11343788 3024#endif /* USE_THREADS */
8990e307 3025 ENTER;
a0d0e21e
LW		 3026
3027 SAVESPTR(curpad);
3028 curpad = 0;
3029
a5f75d66 3030 if (!CvCLONED(cv))
748a9306 3031 op_free(CvROOT(cv));
79072805 3032 CvROOT(cv) = Nullop;
8990e307 3033 LEAVE;
79072805 3034 }
1d5db326 3035 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3036 CvFLAGS(cv) = 0;
8e07c86e
AD		 3037 SvREFCNT_dec(CvGV(cv));
3038 CvGV(cv) = Nullgv;
3039 SvREFCNT_dec(CvOUTSIDE(cv));
3040 CvOUTSIDE(cv) = Nullcv;
3041 if (CvPADLIST(cv)) {
8ebc5c01 3042 /* may be during global destruction */
3043 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3044 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3045 while (i >= 0) {
3046 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3047 SV* sv = svp ? *svp : Nullsv;
3048 if (!sv)
3049 continue;
3050 if (sv == (SV*)comppad_name)
3051 comppad_name = Nullav;
3052 else if (sv == (SV*)comppad) {
3053 comppad = Nullav;
3054 curpad = Null(SV**);
3055 }
3056 SvREFCNT_dec(sv);
8ebc5c01 3057 }
3058 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3059 }
8e07c86e
AD		 3060 CvPADLIST(cv) = Nullav;
3061 }
79072805
LW		 3062}
3063
5f05dabc 3064#ifdef DEBUG_CLOSURES
3065static void
3066cv_dump(cv)
3067CV* cv;
3068{
3069 CV *outside = CvOUTSIDE(cv);
3070 AV* padlist = CvPADLIST(cv);
4fdae800 3071 AV* pad_name;
3072 AV* pad;
3073 SV** pname;
3074 SV** ppad;
5f05dabc 3075 I32 ix;
3076
fb73857a 3077 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3078 cv,
3079 (CvANON(cv) ? "ANON"
3080 : (cv == main_cv) ? "MAIN"
07055b4c 3081 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3082 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3083 outside,
3084 (!outside ? "null"
3085 : CvANON(outside) ? "ANON"
3086 : (outside == main_cv) ? "MAIN"
07055b4c 3087 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3088 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3089
4fdae800 3090 if (!padlist)
3091 return;
3092
3093 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3094 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3095 pname = AvARRAY(pad_name);
3096 ppad = AvARRAY(pad);
3097
93965878 3098 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3099 if (SvPOK(pname[ix]))
fb73857a 3100 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3101 ix, ppad[ix],
3102 SvFAKE(pname[ix]) ? "FAKE " : "",
3103 SvPVX(pname[ix]),
ab50184a
CS		 3104 (long)I_32(SvNVX(pname[ix])),
3105 (long)SvIVX(pname[ix]));
5f05dabc 3106 }
3107}
3108#endif /* DEBUG_CLOSURES */
3109
3110static CV *
8ac85365 3111cv_clone2(CV *proto, CV *outside)
748a9306 3112{
11343788 3113 dTHR;
748a9306
LW		 3114 AV* av;
3115 I32 ix;
3116 AV* protopadlist = CvPADLIST(proto);
3117 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3118 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3119 SV** pname = AvARRAY(protopad_name);
3120 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3121 I32 fname = AvFILLp(protopad_name);
3122 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3123 AV* comppadlist;
3124 CV* cv;
3125
07055b4c
CS		 3126 assert(!CvUNIQUE(proto));
3127
748a9306
LW		 3128 ENTER;
3129 SAVESPTR(curpad);
3130 SAVESPTR(comppad);
46fc3d4c 3131 SAVESPTR(comppad_name);
748a9306
LW		 3132 SAVESPTR(compcv);
3133
3134 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3135 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3136 CvCLONED_on(cv);
5f05dabc 3137 if (CvANON(proto))
3138 CvANON_on(cv);
748a9306 3139
11343788 3140#ifdef USE_THREADS
12ca11f6 3141 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3142 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3143 CvOWNER(cv) = 0;
3144#endif /* USE_THREADS */
748a9306 3145 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3146 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3147 CvSTASH(cv) = CvSTASH(proto);
3148 CvROOT(cv) = CvROOT(proto);
3149 CvSTART(cv) = CvSTART(proto);
5f05dabc 3150 if (outside)
3151 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3152
68dc0745 3153 if (SvPOK(proto))
3154 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3155
46fc3d4c 3156 comppad_name = newAV();
3157 for (ix = fname; ix >= 0; ix--)
3158 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3159
3160 comppad = newAV();
3161
3162 comppadlist = newAV();
3163 AvREAL_off(comppadlist);
46fc3d4c 3164 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3165 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3166 CvPADLIST(cv) = comppadlist;
93965878 3167 av_fill(comppad, AvFILLp(protopad));
748a9306
LW		 3168 curpad = AvARRAY(comppad);
3169
3170 av = newAV(); /* will be @_ */
3171 av_extend(av, 0);
3172 av_store(comppad, 0, (SV*)av);
3173 AvFLAGS(av) = AVf_REIFY;
3174
9607fc9c 3175 for (ix = fpad; ix > 0; ix--) {
3176 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3177 if (namesv && namesv != &sv_undef) {
3178 char *name = SvPVX(namesv); /* XXX */
3179 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3180 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3181 CvOUTSIDE(cv), cxstack_ix);
3182 if (!off)
3183 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3184 else if (off != ix)
748a9306
LW		 3185 croak("panic: cv_clone: %s", name);
3186 }
3187 else { /* our own lexical */
aa689395 3188 SV* sv;
5f05dabc 3189 if (*name == '&') {
3190 /* anon code -- we'll come back for it */
3191 sv = SvREFCNT_inc(ppad[ix]);
3192 }
3193 else if (*name == '@')
3194 sv = (SV*)newAV();
748a9306 3195 else if (*name == '%')
5f05dabc 3196 sv = (SV*)newHV();
748a9306 3197 else
5f05dabc 3198 sv = NEWSV(0,0);
3199 if (!SvPADBUSY(sv))
3200 SvPADMY_on(sv);
3201 curpad[ix] = sv;
748a9306
LW		 3202 }
3203 }
3204 else {
aa689395 3205 SV* sv = NEWSV(0,0);
748a9306 3206 SvPADTMP_on(sv);
5f05dabc 3207 curpad[ix] = sv;
748a9306
LW		 3208 }
3209 }
3210
5f05dabc 3211 /* Now that vars are all in place, clone nested closures. */
3212
9607fc9c 3213 for (ix = fpad; ix > 0; ix--) {
3214 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3215 if (namesv
3216 && namesv != &sv_undef
3217 && !(SvFLAGS(namesv) & SVf_FAKE)
3218 && *SvPVX(namesv) == '&'
5f05dabc 3219 && CvCLONE(ppad[ix]))
3220 {
3221 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3222 SvREFCNT_dec(ppad[ix]);
3223 CvCLONE_on(kid);
3224 SvPADMY_on(kid);
3225 curpad[ix] = (SV*)kid;
748a9306
LW		 3226 }
3227 }
3228
5f05dabc 3229#ifdef DEBUG_CLOSURES
ab50184a
CS		 3230 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3231 cv_dump(outside);
3232 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3233 cv_dump(proto);
ab50184a 3234 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3235 cv_dump(cv);
3236#endif
3237
748a9306
LW		 3238 LEAVE;
3239 return cv;
3240}
3241
3242CV *
8ac85365 3243cv_clone(CV *proto)
5f05dabc 3244{
3245 return cv_clone2(proto, CvOUTSIDE(proto));
3246}
3247
3fe9a6f1 3248void
8ac85365 3249cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3250{
3251 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3252 SV* msg = sv_newmortal();
3fe9a6f1 3253 SV* name = Nullsv;
3254
3255 if (gv)
46fc3d4c 3256 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3257 sv_setpv(msg, "Prototype mismatch:");
3258 if (name)
fc36a67e 3259 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3260 if (SvPOK(cv))
46fc3d4c 3261 sv_catpvf(msg, " (%s)", SvPVX(cv));
3262 sv_catpv(msg, " vs ");
3263 if (p)
3264 sv_catpvf(msg, "(%s)", p);
3265 else
3266 sv_catpv(msg, "none");
fc36a67e 3267 warn("%_", msg);
3fe9a6f1 3268 }
3269}
3270
760ac839 3271SV *
8ac85365 3272cv_const_sv(CV *cv)
760ac839
LW		 3273{
3274 OP *o;
54310121 3275 SV *sv;
aeea060c 3276
54310121 3277 if (!cv || !SvPOK(cv) || SvCUR(cv))
3278 return Nullsv;
760ac839 3279
54310121 3280 sv = Nullsv;
3281 for (o = CvSTART(cv); o; o = o->op_next) {
3282 OPCODE type = o->op_type;
3283
3284 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3285 continue;
3286 if (type == OP_LEAVESUB || type == OP_RETURN)
3287 break;
3288 if (sv)
3289 return Nullsv;
3290 if (type == OP_CONST)
5dc0d613 3291 sv = cSVOPo->op_sv;
54310121 3292 else if (type == OP_PADSV) {
e858de61
MB		 3293 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3294 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3295 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3296 return Nullsv;
760ac839 3297 }
54310121 3298 else
3299 return Nullsv;
760ac839 3300 }
5aabfad6 3301 if (sv)
3302 SvREADONLY_on(sv);
760ac839
LW		 3303 return sv;
3304}
3305
748a9306 3306CV *
8ac85365 3307newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3308{
11343788 3309 dTHR;
5dc0d613 3310 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
44a8e56a 3311 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
3fe9a6f1 3312 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
79072805 3313 register CV *cv;
a0d0e21e 3314 I32 ix;
79072805 3315
11343788 3316 if (o)
5dc0d613 3317 SAVEFREEOP(o);
3fe9a6f1 3318 if (proto)
3319 SAVEFREEOP(proto);
3320
68dc0745 3321 if (!name || GvCVGEN(gv))
3322 cv = Nullcv;
3323 else if (cv = GvCV(gv)) {
3fe9a6f1 3324 cv_ckproto(cv, gv, ps);
68dc0745 3325 /* already defined (or promised)? */
3326 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3327 SV* const_sv;
aa689395 3328 if (!block) {
3329 /* just a "sub foo;" when &foo is already defined */
3330 SAVEFREESV(compcv);
3331 goto done;
3332 }
7bac28a0 3333 /* ahem, death to those who redefine active sort subs */
e336de0d 3334 if (curstackinfo->si_type == SI_SORT && sortcop == CvSTART(cv))
7bac28a0 3335 croak("Can't redefine active sort subroutine %s", name);
68dc0745 3336 const_sv = cv_const_sv(cv);
2f34f9d4
IZ		 3337 if (const_sv || dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
3338 && HvNAME(GvSTASH(CvGV(cv)))
3339 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3340 "autouse"))) {
79072805 3341 line_t oldline = curcop->cop_line;
79072805 3342 curcop->cop_line = copline;
760ac839 3343 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3344 : "Subroutine %s redefined", name);
79072805
LW		 3345 curcop->cop_line = oldline;
3346 }
8990e307 3347 SvREFCNT_dec(cv);
68dc0745 3348 cv = Nullcv;
79072805
LW		 3349 }
3350 }
a0d0e21e 3351 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3352 cv_undef(cv);
44a8e56a 3353 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3354 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3355 CvOUTSIDE(compcv) = 0;
748a9306 3356 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3357 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3358 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3359 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3360 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3361 }
3362 else {
748a9306 3363 cv = compcv;
44a8e56a 3364 if (name) {
3365 GvCV(gv) = cv;
3366 GvCVGEN(gv) = 0;
3367 sub_generation++;
3368 }
a0d0e21e 3369 }
44a8e56a 3370 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3371 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3372 CvSTASH(cv) = curstash;
11343788
MB		 3373#ifdef USE_THREADS
3374 CvOWNER(cv) = 0;
12ca11f6 3375 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3376 MUTEX_INIT(CvMUTEXP(cv));
11343788 3377#endif /* USE_THREADS */
8990e307 3378
3fe9a6f1 3379 if (ps)
3380 sv_setpv((SV*)cv, ps);
4633a7c4 3381
c07a80fd 3382 if (error_count) {
3383 op_free(block);
3384 block = Nullop;
68dc0745 3385 if (name) {
3386 char *s = strrchr(name, ':');
3387 s = s ? s+1 : name;
6d4c2119
CS		 3388 if (strEQ(s, "BEGIN")) {
3389 char *not_safe =
3390 "BEGIN not safe after errors--compilation aborted";
3391 if (in_eval & 4)
3392 croak(not_safe);
3393 else {
3394 /* force display of errors found but not reported */
38a03e6e
MB		 3395 sv_catpv(ERRSV, not_safe);
3396 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3397 }
3398 }
68dc0745 3399 }
c07a80fd 3400 }
a0d0e21e 3401 if (!block) {
a0d0e21e
LW		 3402 copline = NOLINE;
3403 LEAVE_SCOPE(floor);
3404 return cv;
3405 }
3406
93965878
NIS		 3407 if (AvFILLp(comppad_name) < AvFILLp(comppad))
3408 av_store(comppad_name, AvFILLp(comppad), Nullsv);
a0d0e21e 3409
54310121 3410 if (CvCLONE(cv)) {
3411 SV **namep = AvARRAY(comppad_name);
93965878 3412 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3413 SV *namesv;
3414
3415 if (SvIMMORTAL(curpad[ix]))
3416 continue;
3417 /*
3418 * The only things that a clonable function needs in its
3419 * pad are references to outer lexicals and anonymous subs.
3420 * The rest are created anew during cloning.
3421 */
3422 if (!((namesv = namep[ix]) != Nullsv &&
3423 namesv != &sv_undef &&
3424 (SvFAKE(namesv) ||
3425 *SvPVX(namesv) == '&')))
3426 {
3427 SvREFCNT_dec(curpad[ix]);
3428 curpad[ix] = Nullsv;
3429 }
3430 }
a0d0e21e 3431 }
54310121 3432 else {
3433 AV *av = newAV(); /* Will be @_ */
3434 av_extend(av, 0);
3435 av_store(comppad, 0, (SV*)av);
3436 AvFLAGS(av) = AVf_REIFY;
79072805 3437
93965878 3438 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3439 if (SvIMMORTAL(curpad[ix]))
3440 continue;
3441 if (!SvPADMY(curpad[ix]))
3442 SvPADTMP_on(curpad[ix]);
3443 }
3444 }
79072805 3445
a0d0e21e 3446 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3447 CvSTART(cv) = LINKLIST(CvROOT(cv));
3448 CvROOT(cv)->op_next = 0;
3449 peep(CvSTART(cv));
93a17b20 3450
44a8e56a 3451 if (name) {
3452 char *s;
3453
84902520 3454 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3455 SV *sv = NEWSV(0,0);
44a8e56a 3456 SV *tmpstr = sv_newmortal();
549bb64a 3457 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3458 CV *cv;
3459 HV *hv;
3460
51790459
MB		 3461 sv_setpvf(sv, "%_:%ld-%ld",
3462 GvSV(curcop->cop_filegv),
3463 (long)subline, (long)curcop->cop_line);
44a8e56a 3464 gv_efullname3(tmpstr, gv, Nullch);
3465 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3466 hv = GvHVn(db_postponed);
9607fc9c 3467 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3468 && (cv = GvCV(db_postponed))) {
44a8e56a 3469 dSP;
924508f0 3470 PUSHMARK(SP);
44a8e56a 3471 XPUSHs(tmpstr);
3472 PUTBACK;
3473 perl_call_sv((SV*)cv, G_DISCARD);
3474 }
3475 }
79072805 3476
44a8e56a 3477 if ((s = strrchr(name,':')))
28757baa 3478 s++;
3479 else
3480 s = name;
68dc0745 3481 if (strEQ(s, "BEGIN")) {
2ae324a7 3482 I32 oldscope = scopestack_ix;
28757baa 3483 ENTER;
3484 SAVESPTR(compiling.cop_filegv);
3485 SAVEI16(compiling.cop_line);
28757baa 3486 save_svref(&rs);
3487 sv_setsv(rs, nrs);
3488
3489 if (!beginav)
3490 beginav = newAV();
3491 DEBUG_x( dump_sub(gv) );
3492 av_push(beginav, (SV *)cv);
3493 GvCV(gv) = 0;
68dc0745 3494 call_list(oldscope, beginav);
a6006777 3495
28757baa 3496 curcop = &compiling;
3497 LEAVE;
3498 }
3499 else if (strEQ(s, "END") && !error_count) {
3500 if (!endav)
3501 endav = newAV();
3502 av_unshift(endav, 1);
3503 av_store(endav, 0, (SV *)cv);
3504 GvCV(gv) = 0;
3505 }
7d07dbc2
MB		 3506 else if (strEQ(s, "INIT") && !error_count) {
3507 if (!initav)
3508 initav = newAV();
3509 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3510 }
79072805 3511 }
a6006777 3512
aa689395 3513 done:
79072805 3514 copline = NOLINE;
8990e307 3515 LEAVE_SCOPE(floor);
a0d0e21e 3516 return cv;
79072805
LW		 3517}
3518
5476c433
JD		 3519void
3520newCONSTSUB(HV *stash, char *name, SV *sv)
3521{
3522 dTHR;
3523 U32 oldhints = hints;
3524 HV *old_cop_stash = curcop->cop_stash;
3525 HV *old_curstash = curstash;
3526 line_t oldline = curcop->cop_line;
3527 curcop->cop_line = copline;
3528
3529 hints &= ~HINT_BLOCK_SCOPE;
3530 if(stash)
3531 curstash = curcop->cop_stash = stash;
3532
3533 newSUB(
be24f278 3534 start_subparse(FALSE, 0),
5476c433
JD		 3535 newSVOP(OP_CONST, 0, newSVpv(name,0)),
3536 newSVOP(OP_CONST, 0, &sv_no), /* SvPV(&sv_no) == "" -- GMB */
3537 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
3538 );
3539
3540 hints = oldhints;
3541 curcop->cop_stash = old_cop_stash;
3542 curstash = old_curstash;
3543 curcop->cop_line = oldline;
3544}
3545
57d3b86d 3546CV *
aeea060c 3547newXS(char *name, void (*subaddr) (CV *), char *filename)
a0d0e21e 3548{
11343788 3549 dTHR;
44a8e56a 3550 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3551 register CV *cv;
44a8e56a 3552
3553 if (cv = (name ? GvCV(gv) : Nullcv)) {
3554 if (GvCVGEN(gv)) {
3555 /* just a cached method */
3556 SvREFCNT_dec(cv);
3557 cv = 0;
3558 }
3559 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3560 /* already defined (or promised) */
2f34f9d4
IZ		 3561 if (dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
3562 && HvNAME(GvSTASH(CvGV(cv)))
3563 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
a0d0e21e 3564 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3565 curcop->cop_line = copline;
3566 warn("Subroutine %s redefined",name);
3567 curcop->cop_line = oldline;
3568 }
3569 SvREFCNT_dec(cv);
3570 cv = 0;
79072805 3571 }
79072805 3572 }
44a8e56a 3573
3574 if (cv) /* must reuse cv if autoloaded */
3575 cv_undef(cv);
a0d0e21e
LW		 3576 else {
3577 cv = (CV*)NEWSV(1105,0);
3578 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3579 if (name) {
3580 GvCV(gv) = cv;
3581 GvCVGEN(gv) = 0;
3582 sub_generation++;
3583 }
a0d0e21e 3584 }
5196be3e 3585 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3586#ifdef USE_THREADS
12ca11f6 3587 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3588 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3589 CvOWNER(cv) = 0;
3590#endif /* USE_THREADS */
79072805 3591 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3592 CvXSUB(cv) = subaddr;
44a8e56a 3593
28757baa 3594 if (name) {
3595 char *s = strrchr(name,':');
3596 if (s)
3597 s++;
3598 else
3599 s = name;
3600 if (strEQ(s, "BEGIN")) {
3601 if (!beginav)
3602 beginav = newAV();
44a8e56a 3603 av_push(beginav, (SV *)cv);
3604 GvCV(gv) = 0;
28757baa 3605 }
3606 else if (strEQ(s, "END")) {
3607 if (!endav)
3608 endav = newAV();
3609 av_unshift(endav, 1);
44a8e56a 3610 av_store(endav, 0, (SV *)cv);
3611 GvCV(gv) = 0;
28757baa 3612 }
7d07dbc2
MB		 3613 else if (strEQ(s, "INIT")) {
3614 if (!initav)
3615 initav = newAV();
3616 av_push(initav, (SV *)cv);
ae77835f 3617 }
28757baa 3618 }
8990e307 3619 else
a5f75d66 3620 CvANON_on(cv);
44a8e56a 3621
a0d0e21e 3622 return cv;
79072805
LW		 3623}
3624
3625void
8ac85365 3626newFORM(I32 floor, OP *o, OP *block)
79072805 3627{
11343788 3628 dTHR;
79072805
LW		 3629 register CV *cv;
3630 char *name;
3631 GV *gv;
a0d0e21e 3632 I32 ix;
79072805 3633
11343788
MB		 3634 if (o)
3635 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3636 else
3637 name = "STDOUT";
85e6fe83 3638 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3639 GvMULTI_on(gv);
79072805
LW		 3640 if (cv = GvFORM(gv)) {
3641 if (dowarn) {
3642 line_t oldline = curcop->cop_line;
3643
3644 curcop->cop_line = copline;
3645 warn("Format %s redefined",name);
3646 curcop->cop_line = oldline;
3647 }
8990e307 3648 SvREFCNT_dec(cv);
79072805 3649 }
748a9306 3650 cv = compcv;
79072805 3651 GvFORM(gv) = cv;
44a8e56a 3652 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3653 CvFILEGV(cv) = curcop->cop_filegv;
3654
93965878 3655 for (ix = AvFILLp(comppad); ix > 0; ix--) {
44a8e56a 3656 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3657 SvPADTMP_on(curpad[ix]);
3658 }
3659
79072805
LW		 3660 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3661 CvSTART(cv) = LINKLIST(CvROOT(cv));
3662 CvROOT(cv)->op_next = 0;
3663 peep(CvSTART(cv));
11343788 3664 op_free(o);
79072805 3665 copline = NOLINE;
8990e307 3666 LEAVE_SCOPE(floor);
79072805
LW		 3667}
3668
3669OP *
8ac85365 3670newANONLIST(OP *o)
79072805 3671{
93a17b20 3672 return newUNOP(OP_REFGEN, 0,
11343788 3673 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3674}
3675
3676OP *
8ac85365 3677newANONHASH(OP *o)
79072805 3678{
93a17b20 3679 return newUNOP(OP_REFGEN, 0,
11343788 3680 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3681}
3682
3683OP *
8ac85365 3684newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3685{
3686 return newUNOP(OP_REFGEN, 0,
4633a7c4 3687 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3688}
3689
3690OP *
8ac85365 3691oopsAV(OP *o)
79072805 3692{
ed6116ce
LW		 3693 switch (o->op_type) {
3694 case OP_PADSV:
3695 o->op_type = OP_PADAV;
3696 o->op_ppaddr = ppaddr[OP_PADAV];
3697 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3698
3699 case OP_RV2SV:
79072805
LW		 3700 o->op_type = OP_RV2AV;
3701 o->op_ppaddr = ppaddr[OP_RV2AV];
3702 ref(o, OP_RV2AV);
ed6116ce
LW		 3703 break;
3704
3705 default:
79072805 3706 warn("oops: oopsAV");
ed6116ce
LW		 3707 break;
3708 }
79072805
LW		 3709 return o;
3710}
3711
3712OP *
8ac85365 3713oopsHV(OP *o)
79072805 3714{
ed6116ce
LW		 3715 switch (o->op_type) {
3716 case OP_PADSV:
3717 case OP_PADAV:
3718 o->op_type = OP_PADHV;
3719 o->op_ppaddr = ppaddr[OP_PADHV];
3720 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3721
3722 case OP_RV2SV:
3723 case OP_RV2AV:
79072805
LW		 3724 o->op_type = OP_RV2HV;
3725 o->op_ppaddr = ppaddr[OP_RV2HV];
3726 ref(o, OP_RV2HV);
ed6116ce
LW		 3727 break;
3728
3729 default:
79072805 3730 warn("oops: oopsHV");
ed6116ce
LW		 3731 break;
3732 }
79072805
LW		 3733 return o;
3734}
3735
3736OP *
8ac85365 3737newAVREF(OP *o)
79072805 3738{
ed6116ce
LW		 3739 if (o->op_type == OP_PADANY) {
3740 o->op_type = OP_PADAV;
3741 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3742 return o;
ed6116ce 3743 }
79072805
LW		 3744 return newUNOP(OP_RV2AV, 0, scalar(o));
3745}
3746
3747OP *
8ac85365 3748newGVREF(I32 type, OP *o)
79072805 3749{
a0d0e21e
LW		 3750 if (type == OP_MAPSTART)
3751 return newUNOP(OP_NULL, 0, o);
748a9306 3752 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3753}
3754
3755OP *
8ac85365 3756newHVREF(OP *o)
79072805 3757{
ed6116ce
LW		 3758 if (o->op_type == OP_PADANY) {
3759 o->op_type = OP_PADHV;
3760 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3761 return o;
ed6116ce 3762 }
79072805
LW		 3763 return newUNOP(OP_RV2HV, 0, scalar(o));
3764}
3765
3766OP *
8ac85365 3767oopsCV(OP *o)
79072805 3768{
463ee0b2 3769 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3770 /* STUB */
3771 return o;
3772}
3773
3774OP *
8ac85365 3775newCVREF(I32 flags, OP *o)
79072805 3776{
c07a80fd 3777 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3778}
3779
3780OP *
8ac85365 3781newSVREF(OP *o)
79072805 3782{
ed6116ce
LW		 3783 if (o->op_type == OP_PADANY) {
3784 o->op_type = OP_PADSV;
3785 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3786 return o;
ed6116ce 3787 }
224a4551
MB		 3788 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
3789 o->op_flags |= OPpDONE_SVREF;
a863c7d1 3790 return o;
224a4551 3791 }
79072805
LW		 3792 return newUNOP(OP_RV2SV, 0, scalar(o));
3793}
3794
3795/* Check routines. */
3796
3797OP *
8ac85365 3798ck_anoncode(OP *o)
5f05dabc 3799{
178c6305
CS		 3800 PADOFFSET ix;
3801 SV* name;
3802
3803 name = NEWSV(1106,0);
3804 sv_upgrade(name, SVt_PVNV);
3805 sv_setpvn(name, "&", 1);
3806 SvIVX(name) = -1;
3807 SvNVX(name) = 1;
5dc0d613 3808 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3809 av_store(comppad_name, ix, name);
5dc0d613
MB		 3810 av_store(comppad, ix, cSVOPo->op_sv);
3811 SvPADMY_on(cSVOPo->op_sv);
3812 cSVOPo->op_sv = Nullsv;
3813 cSVOPo->op_targ = ix;
3814 return o;
5f05dabc 3815}
3816
3817OP *
8ac85365 3818ck_bitop(OP *o)
55497cff 3819{
5dc0d613
MB		 3820 o->op_private = hints;
3821 return o;
55497cff 3822}
3823
3824OP *
8ac85365 3825ck_concat(OP *o)
79072805 3826{
11343788
MB		 3827 if (cUNOPo->op_first->op_type == OP_CONCAT)
3828 o->op_flags |= OPf_STACKED;
3829 return o;
79072805
LW		 3830}
3831
3832OP *
8ac85365 3833ck_spair(OP *o)
79072805 3834{
11343788 3835 if (o->op_flags & OPf_KIDS) {
79072805 3836 OP* newop;
a0d0e21e 3837 OP* kid;
5dc0d613
MB		 3838 OPCODE type = o->op_type;
3839 o = modkids(ck_fun(o), type);
11343788 3840 kid = cUNOPo->op_first;
a0d0e21e
LW		 3841 newop = kUNOP->op_first->op_sibling;
3842 if (newop &&
3843 (newop->op_sibling ||
3844 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3845 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3846 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3847
11343788 3848 return o;
a0d0e21e
LW		 3849 }
3850 op_free(kUNOP->op_first);
3851 kUNOP->op_first = newop;
3852 }
11343788
MB		 3853 o->op_ppaddr = ppaddr[++o->op_type];
3854 return ck_fun(o);
a0d0e21e
LW		 3855}
3856
3857OP *
8ac85365 3858ck_delete(OP *o)
a0d0e21e 3859{
11343788 3860 o = ck_fun(o);
5dc0d613 3861 o->op_private = 0;
11343788
MB		 3862 if (o->op_flags & OPf_KIDS) {
3863 OP *kid = cUNOPo->op_first;
5f05dabc 3864 if (kid->op_type == OP_HSLICE)
5dc0d613 3865 o->op_private |= OPpSLICE;
5f05dabc 3866 else if (kid->op_type != OP_HELEM)
3867 croak("%s argument is not a HASH element or slice",
5dc0d613 3868 op_desc[o->op_type]);
a0d0e21e 3869 null(kid);
79072805 3870 }
11343788 3871 return o;
79072805
LW		 3872}
3873
3874OP *
8ac85365 3875ck_eof(OP *o)
79072805 3876{
11343788 3877 I32 type = o->op_type;
79072805 3878
11343788
MB		 3879 if (o->op_flags & OPf_KIDS) {
3880 if (cLISTOPo->op_first->op_type == OP_STUB) {
3881 op_free(o);
3882 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 3883 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 3884 }
11343788 3885 return ck_fun(o);
79072805 3886 }
11343788 3887 return o;
79072805
LW		 3888}
3889
3890OP *
8ac85365 3891ck_eval(OP *o)
79072805 3892{
85e6fe83 3893 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 3894 if (o->op_flags & OPf_KIDS) {
3895 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 3896
93a17b20 3897 if (!kid) {
11343788
MB		 3898 o->op_flags &= ~OPf_KIDS;
3899 null(o);
79072805
LW		 3900 }
3901 else if (kid->op_type == OP_LINESEQ) {
3902 LOGOP *enter;
3903
11343788
MB		 3904 kid->op_next = o->op_next;
3905 cUNOPo->op_first = 0;
3906 op_free(o);
79072805
LW		 3907
3908 Newz(1101, enter, 1, LOGOP);
3909 enter->op_type = OP_ENTERTRY;
3910 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
3911 enter->op_private = 0;
3912
3913 /* establish postfix order */
3914 enter->op_next = (OP*)enter;
3915
11343788
MB		 3916 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
3917 o->op_type = OP_LEAVETRY;
3918 o->op_ppaddr = ppaddr[OP_LEAVETRY];
3919 enter->op_other = o;
3920 return o;
79072805 3921 }
c7cc6f1c 3922 else
473986ff 3923 scalar((OP*)kid);
79072805
LW		 3924 }
3925 else {
11343788 3926 op_free(o);
54b9620d 3927 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 3928 }
11343788
MB		 3929 o->op_targ = (PADOFFSET)hints;
3930 return o;
79072805
LW		 3931}
3932
3933OP *
8ac85365 3934ck_exec(OP *o)
79072805
LW		 3935{
3936 OP *kid;
11343788
MB		 3937 if (o->op_flags & OPf_STACKED) {
3938 o = ck_fun(o);
3939 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 3940 if (kid->op_type == OP_RV2GV)
3941 null(kid);
79072805 3942 }
463ee0b2 3943 else
11343788
MB		 3944 o = listkids(o);
3945 return o;
79072805
LW		 3946}
3947
3948OP *
8ac85365 3949ck_exists(OP *o)
5f05dabc 3950{
5196be3e
MB		 3951 o = ck_fun(o);
3952 if (o->op_flags & OPf_KIDS) {
3953 OP *kid = cUNOPo->op_first;
5f05dabc 3954 if (kid->op_type != OP_HELEM)
5196be3e 3955 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 3956 null(kid);
3957 }
5196be3e 3958 return o;
5f05dabc 3959}
3960
3961OP *
8ac85365 3962ck_gvconst(register OP *o)
79072805
LW		 3963{
3964 o = fold_constants(o);
3965 if (o->op_type == OP_CONST)
3966 o->op_type = OP_GV;
3967 return o;
3968}
3969
3970OP *
8ac85365 3971ck_rvconst(register OP *o)
79072805 3972{
11343788
MB		 3973 dTHR;
3974 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 3975
11343788 3976 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 3977 if (kid->op_type == OP_CONST) {
44a8e56a 3978 char *name;
3979 int iscv;
3980 GV *gv;
3981
3982 name = SvPV(kid->op_sv, na);
3983 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
3984 char *badthing = Nullch;
5dc0d613 3985 switch (o->op_type) {
44a8e56a 3986 case OP_RV2SV:
3987 badthing = "a SCALAR";
3988 break;
3989 case OP_RV2AV:
3990 badthing = "an ARRAY";
3991 break;
3992 case OP_RV2HV:
3993 badthing = "a HASH";
3994 break;
3995 }
3996 if (badthing)
3997 croak(
3998 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
3999 name, badthing);
4000 }
93233ece
CS		 4001 /*
4002 * This is a little tricky. We only want to add the symbol if we
4003 * didn't add it in the lexer. Otherwise we get duplicate strict
4004 * warnings. But if we didn't add it in the lexer, we must at
4005 * least pretend like we wanted to add it even if it existed before,
4006 * or we get possible typo warnings. OPpCONST_ENTERED says
4007 * whether the lexer already added THIS instance of this symbol.
4008 */
5196be3e 4009 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4010 do {
44a8e56a 4011 gv = gv_fetchpv(name,
748a9306 4012 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4013 iscv
4014 ? SVt_PVCV
11343788 4015 : o->op_type == OP_RV2SV
a0d0e21e 4016 ? SVt_PV
11343788 4017 : o->op_type == OP_RV2AV
a0d0e21e 4018 ? SVt_PVAV
11343788 4019 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4020 ? SVt_PVHV
4021 : SVt_PVGV);
93233ece
CS		 4022 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4023 if (gv) {
4024 kid->op_type = OP_GV;
4025 SvREFCNT_dec(kid->op_sv);
4026 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4027 }
79072805 4028 }
11343788 4029 return o;
79072805
LW		 4030}
4031
4032OP *
8ac85365 4033ck_ftst(OP *o)
79072805 4034{
11343788
MB		 4035 dTHR;
4036 I32 type = o->op_type;
79072805 4037
11343788
MB		 4038 if (o->op_flags & OPf_REF)
4039 return o;
79072805 4040
11343788
MB		 4041 if (o->op_flags & OPf_KIDS) {
4042 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4043
4044 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4045 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 4046 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 4047 op_free(o);
79072805
LW		 4048 return newop;
4049 }
4050 }
4051 else {
11343788 4052 op_free(o);
79072805 4053 if (type == OP_FTTTY)
fb73857a 4054 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4055 SVt_PVIO));
79072805 4056 else
54b9620d 4057 return newUNOP(type, 0, newDEFSVOP());
79072805 4058 }
11343788 4059 return o;
79072805
LW		 4060}
4061
4062OP *
8ac85365 4063ck_fun(OP *o)
79072805 4064{
11343788 4065 dTHR;
79072805
LW		 4066 register OP *kid;
4067 OP **tokid;
4068 OP *sibl;
4069 I32 numargs = 0;
11343788 4070 int type = o->op_type;
a0d0e21e 4071 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4072
11343788 4073 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4074 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4075 oa &= ~OA_OPTIONAL;
4076 else
11343788 4077 return no_fh_allowed(o);
79072805
LW		 4078 }
4079
11343788
MB		 4080 if (o->op_flags & OPf_KIDS) {
4081 tokid = &cLISTOPo->op_first;
4082 kid = cLISTOPo->op_first;
8990e307
LW		 4083 if (kid->op_type == OP_PUSHMARK ||
4084 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4085 {
79072805
LW		 4086 tokid = &kid->op_sibling;
4087 kid = kid->op_sibling;
4088 }
a0d0e21e 4089 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4090 *tokid = kid = newDEFSVOP();
79072805
LW		 4091
4092 while (oa && kid) {
4093 numargs++;
4094 sibl = kid->op_sibling;
4095 switch (oa & 7) {
4096 case OA_SCALAR:
4097 scalar(kid);
4098 break;
4099 case OA_LIST:
4100 if (oa < 16) {
4101 kid = 0;
4102 continue;
4103 }
4104 else
4105 list(kid);
4106 break;
4107 case OA_AVREF:
4108 if (kid->op_type == OP_CONST &&
4109 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4110 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4111 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4112 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4113 if (dowarn)
ff0cee69 4114 warn("Array @%s missing the @ in argument %ld of %s()",
4115 name, (long)numargs, op_desc[type]);
79072805
LW		 4116 op_free(kid);
4117 kid = newop;
4118 kid->op_sibling = sibl;
4119 *tokid = kid;
4120 }
8990e307 4121 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4122 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4123 mod(kid, type);
79072805
LW		 4124 break;
4125 case OA_HVREF:
4126 if (kid->op_type == OP_CONST &&
4127 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4128 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4129 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4130 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4131 if (dowarn)
ff0cee69 4132 warn("Hash %%%s missing the %% in argument %ld of %s()",
4133 name, (long)numargs, op_desc[type]);
79072805
LW		 4134 op_free(kid);
4135 kid = newop;
4136 kid->op_sibling = sibl;
4137 *tokid = kid;
4138 }
8990e307 4139 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4140 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4141 mod(kid, type);
79072805
LW		 4142 break;
4143 case OA_CVREF:
4144 {
a0d0e21e 4145 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4146 kid->op_sibling = 0;
4147 linklist(kid);
4148 newop->op_next = newop;
4149 kid = newop;
4150 kid->op_sibling = sibl;
4151 *tokid = kid;
4152 }
4153 break;
4154 case OA_FILEREF:
4155 if (kid->op_type != OP_GV) {
4156 if (kid->op_type == OP_CONST &&
4157 (kid->op_private & OPpCONST_BARE)) {
4158 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4159 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4160 SVt_PVIO) );
79072805
LW		 4161 op_free(kid);
4162 kid = newop;
4163 }
4164 else {
4165 kid->op_sibling = 0;
4166 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4167 }
4168 kid->op_sibling = sibl;
4169 *tokid = kid;
4170 }
4171 scalar(kid);
4172 break;
4173 case OA_SCALARREF:
a0d0e21e 4174 mod(scalar(kid), type);
79072805
LW		 4175 break;
4176 }
4177 oa >>= 4;
4178 tokid = &kid->op_sibling;
4179 kid = kid->op_sibling;
4180 }
11343788 4181 o->op_private |= numargs;
79072805 4182 if (kid)
11343788
MB		 4183 return too_many_arguments(o,op_desc[o->op_type]);
4184 listkids(o);
79072805 4185 }
a0d0e21e 4186 else if (opargs[type] & OA_DEFGV) {
11343788 4187 op_free(o);
54b9620d 4188 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4189 }
4190
79072805
LW		 4191 if (oa) {
4192 while (oa & OA_OPTIONAL)
4193 oa >>= 4;
4194 if (oa && oa != OA_LIST)
11343788 4195 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4196 }
11343788 4197 return o;
79072805
LW		 4198}
4199
4200OP *
8ac85365 4201ck_glob(OP *o)
79072805 4202{
fb73857a 4203 GV *gv;
4204
1f2bfc8a 4205 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4206 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4207
4208 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4209 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4210
4211 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4212 static int glob_index;
4213
5196be3e 4214 append_elem(OP_GLOB, o,
46fc3d4c 4215 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4216 o->op_type = OP_LIST;
4217 o->op_ppaddr = ppaddr[OP_LIST];
4218 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4219 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4220 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4221 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4222 scalar(newUNOP(OP_RV2CV, 0,
4223 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4224 o = newUNOP(OP_NULL, 0, ck_subr(o));
4225 o->op_targ = OP_GLOB; /* hint at what it used to be */
4226 return o;
b1cb66bf 4227 }
4228 gv = newGVgen("main");
a0d0e21e 4229 gv_IOadd(gv);
11343788
MB		 4230 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4231 scalarkids(o);
4232 return ck_fun(o);
79072805
LW		 4233}
4234
4235OP *
8ac85365 4236ck_grep(OP *o)
79072805
LW		 4237{
4238 LOGOP *gwop;
4239 OP *kid;
11343788 4240 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4241
11343788 4242 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4243 Newz(1101, gwop, 1, LOGOP);
aeea060c 4244
11343788 4245 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4246 OP* k;
11343788
MB		 4247 o = ck_sort(o);
4248 kid = cLISTOPo->op_first->op_sibling;
4249 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4250 kid = k;
4251 }
4252 kid->op_next = (OP*)gwop;
11343788 4253 o->op_flags &= ~OPf_STACKED;
93a17b20 4254 }
11343788 4255 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4256 if (type == OP_MAPWHILE)
4257 list(kid);
4258 else
4259 scalar(kid);
11343788 4260 o = ck_fun(o);
79072805 4261 if (error_count)
11343788 4262 return o;
aeea060c 4263 kid = cLISTOPo->op_first->op_sibling;
79072805 4264 if (kid->op_type != OP_NULL)
463ee0b2 4265 croak("panic: ck_grep");
79072805
LW		 4266 kid = kUNOP->op_first;
4267
a0d0e21e
LW		 4268 gwop->op_type = type;
4269 gwop->op_ppaddr = ppaddr[type];
11343788 4270 gwop->op_first = listkids(o);
79072805
LW		 4271 gwop->op_flags |= OPf_KIDS;
4272 gwop->op_private = 1;
4273 gwop->op_other = LINKLIST(kid);
a0d0e21e 4274 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4275 kid->op_next = (OP*)gwop;
4276
11343788 4277 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4278 if (!kid || !kid->op_sibling)
11343788 4279 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4280 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4281 mod(kid, OP_GREPSTART);
4282
79072805
LW		 4283 return (OP*)gwop;
4284}
4285
4286OP *
8ac85365 4287ck_index(OP *o)
79072805 4288{
11343788
MB		 4289 if (o->op_flags & OPf_KIDS) {
4290 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4291 if (kid && kid->op_type == OP_CONST)
2779dcf1 4292 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4293 }
11343788 4294 return ck_fun(o);
79072805
LW		 4295}
4296
4297OP *
8ac85365 4298ck_lengthconst(OP *o)
79072805
LW		 4299{
4300 /* XXX length optimization goes here */
11343788 4301 return ck_fun(o);
79072805
LW		 4302}
4303
4304OP *
8ac85365 4305ck_lfun(OP *o)
79072805 4306{
5dc0d613
MB		 4307 OPCODE type = o->op_type;
4308 return modkids(ck_fun(o), type);
79072805
LW		 4309}
4310
4311OP *
8ac85365 4312ck_rfun(OP *o)
8990e307 4313{
5dc0d613
MB		 4314 OPCODE type = o->op_type;
4315 return refkids(ck_fun(o), type);
8990e307
LW		 4316}
4317
4318OP *
8ac85365 4319ck_listiob(OP *o)
79072805
LW		 4320{
4321 register OP *kid;
aeea060c 4322
11343788 4323 kid = cLISTOPo->op_first;
79072805 4324 if (!kid) {
11343788
MB		 4325 o = force_list(o);
4326 kid = cLISTOPo->op_first;
79072805
LW		 4327 }
4328 if (kid->op_type == OP_PUSHMARK)
4329 kid = kid->op_sibling;
11343788 4330 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4331 kid = kid->op_sibling;
4332 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4333 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4334 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4335 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4336 cLISTOPo->op_first->op_sibling = kid;
4337 cLISTOPo->op_last = kid;
79072805
LW		 4338 kid = kid->op_sibling;
4339 }
4340 }
4341
4342 if (!kid)
54b9620d 4343 append_elem(o->op_type, o, newDEFSVOP());
79072805 4344
5dc0d613 4345 o = listkids(o);
bbce6d69 4346
5dc0d613 4347 o->op_private = 0;
36477c24 4348#ifdef USE_LOCALE
bbce6d69 4349 if (hints & HINT_LOCALE)
5dc0d613 4350 o->op_private |= OPpLOCALE;
bbce6d69 4351#endif
4352
5dc0d613 4353 return o;
bbce6d69 4354}
4355
4356OP *
8ac85365 4357ck_fun_locale(OP *o)
bbce6d69 4358{
5dc0d613 4359 o = ck_fun(o);
bbce6d69 4360
5dc0d613 4361 o->op_private = 0;
36477c24 4362#ifdef USE_LOCALE
bbce6d69 4363 if (hints & HINT_LOCALE)
5dc0d613 4364 o->op_private |= OPpLOCALE;
bbce6d69 4365#endif
4366
5dc0d613 4367 return o;
bbce6d69 4368}
4369
4370OP *
8ac85365 4371ck_scmp(OP *o)
bbce6d69 4372{
5dc0d613 4373 o->op_private = 0;
36477c24 4374#ifdef USE_LOCALE
bbce6d69 4375 if (hints & HINT_LOCALE)
5dc0d613 4376 o->op_private |= OPpLOCALE;
bbce6d69 4377#endif
36477c24 4378
5dc0d613 4379 return o;
79072805
LW		 4380}
4381
4382OP *
8ac85365 4383ck_match(OP *o)
79072805 4384{
5dc0d613 4385 o->op_private |= OPpRUNTIME;
11343788 4386 return o;
79072805
LW		 4387}
4388
4389OP *
8ac85365 4390ck_null(OP *o)
79072805 4391{
11343788 4392 return o;
79072805
LW		 4393}
4394
4395OP *
8ac85365 4396ck_repeat(OP *o)
79072805 4397{
11343788
MB		 4398 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4399 o->op_private |= OPpREPEAT_DOLIST;
4400 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4401 }
4402 else
11343788
MB		 4403 scalar(o);
4404 return o;
79072805
LW		 4405}
4406
4407OP *
8ac85365 4408ck_require(OP *o)
8990e307 4409{
11343788
MB		 4410 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4411 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4412
4413 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4414 char *s;
a0d0e21e
LW		 4415 for (s = SvPVX(kid->op_sv); *s; s++) {
4416 if (*s == ':' && s[1] == ':') {
4417 *s = '/';
1aef975c 4418 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4419 --SvCUR(kid->op_sv);
4420 }
8990e307 4421 }
a0d0e21e 4422 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4423 }
4424 }
11343788 4425 return ck_fun(o);
8990e307
LW		 4426}
4427
4428OP *
8ac85365 4429ck_retarget(OP *o)
79072805 4430{
463ee0b2 4431 croak("NOT IMPL LINE %d",__LINE__);
79072805 4432 /* STUB */
11343788 4433 return o;
79072805
LW		 4434}
4435
4436OP *
8ac85365 4437ck_select(OP *o)
79072805 4438{
c07a80fd 4439 OP* kid;
11343788
MB		 4440 if (o->op_flags & OPf_KIDS) {
4441 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4442 if (kid && kid->op_sibling) {
11343788
MB		 4443 o->op_type = OP_SSELECT;
4444 o->op_ppaddr = ppaddr[OP_SSELECT];
4445 o = ck_fun(o);
4446 return fold_constants(o);
79072805
LW		 4447 }
4448 }
11343788
MB		 4449 o = ck_fun(o);
4450 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4451 if (kid && kid->op_type == OP_RV2GV)
4452 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4453 return o;
79072805
LW		 4454}
4455
4456OP *
8ac85365 4457ck_shift(OP *o)
79072805 4458{
11343788 4459 I32 type = o->op_type;
79072805 4460
11343788 4461 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4462 OP *argop;
4463
11343788 4464 op_free(o);
6d4ff0d2 4465#ifdef USE_THREADS
977336f5 4466 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4467 argop = newOP(OP_PADAV, OPf_REF);
4468 argop->op_targ = 0; /* curpad[0] is @_ */
4469 }
4470 else {
4471 argop = newUNOP(OP_RV2AV, 0,
4472 scalar(newGVOP(OP_GV, 0,
4473 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4474 }
4475#else
4476 argop = newUNOP(OP_RV2AV, 0,
977336f5 4477 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4478 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4479#endif /* USE_THREADS */
4480 return newUNOP(type, 0, scalar(argop));
79072805 4481 }
11343788 4482 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4483}
4484
4485OP *
8ac85365 4486ck_sort(OP *o)
79072805 4487{
5dc0d613 4488 o->op_private = 0;
36477c24 4489#ifdef USE_LOCALE
bbce6d69 4490 if (hints & HINT_LOCALE)
5dc0d613 4491 o->op_private |= OPpLOCALE;
bbce6d69 4492#endif
4493
11343788
MB		 4494 if (o->op_flags & OPf_STACKED) {
4495 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4496 OP *k;
4497 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4498
463ee0b2 4499 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4500 linklist(kid);
463ee0b2
LW		 4501 if (kid->op_type == OP_SCOPE) {
4502 k = kid->op_next;
4503 kid->op_next = 0;
79072805 4504 }
463ee0b2 4505 else if (kid->op_type == OP_LEAVE) {
11343788 4506 if (o->op_type == OP_SORT) {
748a9306
LW		 4507 null(kid); /* wipe out leave */
4508 kid->op_next = kid;
463ee0b2 4509
748a9306
LW		 4510 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4511 if (k->op_next == kid)
4512 k->op_next = 0;
4513 }
463ee0b2 4514 }
748a9306
LW		 4515 else
4516 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4517 k = kLISTOP->op_first;
463ee0b2 4518 }
a0d0e21e
LW		 4519 peep(k);
4520
11343788 4521 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4522 null(kid); /* wipe out rv2gv */
11343788 4523 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4524 kid->op_next = kid;
4525 else
4526 kid->op_next = k;
11343788 4527 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4528 }
4529 }
bbce6d69 4530
11343788 4531 return o;
79072805
LW		 4532}
4533
4534OP *
8ac85365 4535ck_split(OP *o)
79072805
LW		 4536{
4537 register OP *kid;
aeea060c 4538
11343788
MB		 4539 if (o->op_flags & OPf_STACKED)
4540 return no_fh_allowed(o);
79072805 4541
11343788 4542 kid = cLISTOPo->op_first;
8990e307 4543 if (kid->op_type != OP_NULL)
463ee0b2 4544 croak("panic: ck_split");
8990e307 4545 kid = kid->op_sibling;
11343788
MB		 4546 op_free(cLISTOPo->op_first);
4547 cLISTOPo->op_first = kid;
85e6fe83 4548 if (!kid) {
11343788
MB		 4549 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4550 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4551 }
79072805
LW		 4552
4553 if (kid->op_type != OP_MATCH) {
4554 OP *sibl = kid->op_sibling;
463ee0b2 4555 kid->op_sibling = 0;
79072805 4556 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4557 if (cLISTOPo->op_first == cLISTOPo->op_last)
4558 cLISTOPo->op_last = kid;
4559 cLISTOPo->op_first = kid;
79072805
LW		 4560 kid->op_sibling = sibl;
4561 }
4562
4563 kid->op_type = OP_PUSHRE;
4564 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4565 scalar(kid);
4566
4567 if (!kid->op_sibling)
54b9620d 4568 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4569
4570 kid = kid->op_sibling;
4571 scalar(kid);
4572
4573 if (!kid->op_sibling)
11343788 4574 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4575
4576 kid = kid->op_sibling;
4577 scalar(kid);
4578
4579 if (kid->op_sibling)
11343788 4580 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4581
11343788 4582 return o;
79072805
LW		 4583}
4584
4585OP *
8ac85365 4586ck_subr(OP *o)
79072805 4587{
11343788
MB		 4588 dTHR;
4589 OP *prev = ((cUNOPo->op_first->op_sibling)
4590 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4591 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4592 OP *cvop;
4593 char *proto = 0;
4594 CV *cv = 0;
46fc3d4c 4595 GV *namegv = 0;
4633a7c4
LW		 4596 int optional = 0;
4597 I32 arg = 0;
4598
11343788 4599 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4600 if (cvop->op_type == OP_RV2CV) {
4601 SVOP* tmpop;
11343788 4602 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4603 null(cvop); /* disable rv2cv */
4604 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4605 if (tmpop->op_type == OP_GV) {
8ebc5c01 4606 cv = GvCVu(tmpop->op_sv);
5dc0d613 4607 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4608 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4609 proto = SvPV((SV*)cv, na);
4610 }
4633a7c4
LW		 4611 }
4612 }
11343788 4613 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4614 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4615 o->op_private |= OPpENTERSUB_DB;
4616 while (o2 != cvop) {
4633a7c4
LW		 4617 if (proto) {
4618 switch (*proto) {
4619 case '\0':
5dc0d613 4620 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4621 case ';':
4622 optional = 1;
4623 proto++;
4624 continue;
4625 case '$':
4626 proto++;
4627 arg++;
11343788 4628 scalar(o2);
4633a7c4
LW		 4629 break;
4630 case '%':
4631 case '@':
11343788 4632 list(o2);
4633a7c4
LW		 4633 arg++;
4634 break;
4635 case '&':
4636 proto++;
4637 arg++;
11343788 4638 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4639 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4640 break;
4641 case '*':
4642 proto++;
4643 arg++;
11343788 4644 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4645 goto wrapref;
4646 {
11343788 4647 OP* kid = o2;
69dcf70c 4648 OP* sib = kid->op_sibling;
4633a7c4 4649 kid->op_sibling = 0;
69dcf70c
MB		 4650 o2 = newUNOP(OP_RV2GV, 0, kid);
4651 o2->op_sibling = sib;
6fa846a0 4652 prev->op_sibling = o2;
4633a7c4
LW		 4653 }
4654 goto wrapref;
4655 case '\\':
4656 proto++;
4657 arg++;
4658 switch (*proto++) {
4659 case '*':
11343788 4660 if (o2->op_type != OP_RV2GV)
5dc0d613 4661 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4662 goto wrapref;
4663 case '&':
11343788 4664 if (o2->op_type != OP_RV2CV)
5dc0d613 4665 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4666 goto wrapref;
4667 case '$':
11343788 4668 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4669 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4670 goto wrapref;
4671 case '@':
11343788 4672 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4673 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4674 goto wrapref;
4675 case '%':
11343788 4676 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4677 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4678 wrapref:
4679 {
11343788 4680 OP* kid = o2;
6fa846a0 4681 OP* sib = kid->op_sibling;
4633a7c4 4682 kid->op_sibling = 0;
6fa846a0
GS		 4683 o2 = newUNOP(OP_REFGEN, 0, kid);
4684 o2->op_sibling = sib;
e858de61 4685 prev->op_sibling = o2;
4633a7c4
LW		 4686 }
4687 break;
4688 default: goto oops;
4689 }
4690 break;
b1cb66bf 4691 case ' ':
4692 proto++;
4693 continue;
4633a7c4
LW		 4694 default:
4695 oops:
4696 croak("Malformed prototype for %s: %s",
46fc3d4c 4697 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4698 }
4699 }
4700 else
11343788
MB		 4701 list(o2);
4702 mod(o2, OP_ENTERSUB);
4703 prev = o2;
4704 o2 = o2->op_sibling;
4633a7c4 4705 }
fb73857a 4706 if (proto && !optional &&
4707 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4708 return too_few_arguments(o, gv_ename(namegv));
11343788 4709 return o;
79072805
LW		 4710}
4711
4712OP *
8ac85365 4713ck_svconst(OP *o)
8990e307 4714{
11343788
MB		 4715 SvREADONLY_on(cSVOPo->op_sv);
4716 return o;
8990e307
LW		 4717}
4718
4719OP *
8ac85365 4720ck_trunc(OP *o)
79072805 4721{
11343788
MB		 4722 if (o->op_flags & OPf_KIDS) {
4723 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4724
a0d0e21e
LW		 4725 if (kid->op_type == OP_NULL)
4726 kid = (SVOP*)kid->op_sibling;
4727 if (kid &&
4728 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4729 o->op_flags |= OPf_SPECIAL;
79072805 4730 }
11343788 4731 return ck_fun(o);
79072805
LW		 4732}
4733
463ee0b2
LW		 4734/* A peephole optimizer. We visit the ops in the order they're to execute. */
4735
79072805 4736void
8ac85365 4737peep(register OP *o)
79072805 4738{
11343788 4739 dTHR;
79072805 4740 register OP* oldop = 0;
a0d0e21e 4741 if (!o || o->op_seq)
79072805 4742 return;
a0d0e21e 4743 ENTER;
462e5cf6 4744 SAVEOP();
a0d0e21e
LW		 4745 SAVESPTR(curcop);
4746 for (; o; o = o->op_next) {
4747 if (o->op_seq)
4748 break;
c07a80fd 4749 if (!op_seqmax)
4750 op_seqmax++;
a0d0e21e
LW		 4751 op = o;
4752 switch (o->op_type) {
4753 case OP_NEXTSTATE:
4754 case OP_DBSTATE:
4755 curcop = ((COP*)o); /* for warnings */
c07a80fd 4756 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4757 break;
4758
4759 case OP_CONCAT:
4760 case OP_CONST:
4761 case OP_JOIN:
4762 case OP_UC:
4763 case OP_UCFIRST:
4764 case OP_LC:
4765 case OP_LCFIRST:
4766 case OP_QUOTEMETA:
3c4f770c 4767 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4768 null(o->op_next);
c07a80fd 4769 o->op_seq = op_seqmax++;
a0d0e21e 4770 break;
8990e307 4771 case OP_STUB:
54310121 4772 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4773 o->op_seq = op_seqmax++;
54310121 4774 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4775 }
748a9306 4776 goto nothin;
79072805 4777 case OP_NULL:
748a9306 4778 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
7766148a 4779 curcop = ((COP*)o);
748a9306 4780 goto nothin;
79072805 4781 case OP_SCALAR:
93a17b20 4782 case OP_LINESEQ:
463ee0b2 4783 case OP_SCOPE:
748a9306 4784 nothin:
a0d0e21e
LW		 4785 if (oldop && o->op_next) {
4786 oldop->op_next = o->op_next;
79072805
LW		 4787 continue;
4788 }
c07a80fd 4789 o->op_seq = op_seqmax++;
79072805
LW		 4790 break;
4791
4792 case OP_GV:
a0d0e21e 4793 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4794 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4795 null(o->op_next);
4796 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4797 o->op_next = o->op_next->op_next;
4798 o->op_type = OP_GVSV;
4799 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4800 }
4801 }
a0d0e21e
LW		 4802 else if (o->op_next->op_type == OP_RV2AV) {
4803 OP* pop = o->op_next->op_next;
4804 IV i;
8990e307 4805 if (pop->op_type == OP_CONST &&
e858de61 4806 (op = pop->op_next) &&
8990e307 4807 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4808 !(pop->op_next->op_private &
68dc0745 4809 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4810 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4811 <= 255 &&
8990e307
LW		 4812 i >= 0)
4813 {
748a9306 4814 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4815 null(o->op_next);
8990e307
LW		 4816 null(pop->op_next);
4817 null(pop);
a0d0e21e
LW		 4818 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4819 o->op_next = pop->op_next->op_next;
4820 o->op_type = OP_AELEMFAST;
4821 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4822 o->op_private = (U8)i;
a6006777 4823 GvAVn(((GVOP*)o)->op_gv);
8990e307 4824 }
79072805 4825 }
c07a80fd 4826 o->op_seq = op_seqmax++;
79072805
LW		 4827 break;
4828
af41f3ca
MB		 4829 case OP_PADAV:
4830 if (o->op_next->op_type == OP_RV2AV
4831 && (o->op_next->op_flags && OPf_REF))
4832 {
4833 null(o->op_next);
4834 o->op_next = o->op_next->op_next;
4835 }
4836 break;
aeea060c 4837
af41f3ca
MB		 4838 case OP_PADHV:
4839 if (o->op_next->op_type == OP_RV2HV
4840 && (o->op_next->op_flags && OPf_REF))
4841 {
4842 null(o->op_next);
4843 o->op_next = o->op_next->op_next;
4844 }
4845 break;
4846
a0d0e21e 4847 case OP_MAPWHILE:
79072805
LW		 4848 case OP_GREPWHILE:
4849 case OP_AND:
4850 case OP_OR:
c07a80fd 4851 o->op_seq = op_seqmax++;
fd4d1407
IZ		 4852 while (cLOGOP->op_other->op_type == OP_NULL)
4853 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 4854 peep(cLOGOP->op_other);
4855 break;
4856
4857 case OP_COND_EXPR:
c07a80fd 4858 o->op_seq = op_seqmax++;
79072805
LW		 4859 peep(cCONDOP->op_true);
4860 peep(cCONDOP->op_false);
4861 break;
4862
4863 case OP_ENTERLOOP:
c07a80fd 4864 o->op_seq = op_seqmax++;
79072805
LW		 4865 peep(cLOOP->op_redoop);
4866 peep(cLOOP->op_nextop);
4867 peep(cLOOP->op_lastop);
4868 break;
4869
4870 case OP_MATCH:
4871 case OP_SUBST:
c07a80fd 4872 o->op_seq = op_seqmax++;
a0d0e21e 4873 peep(cPMOP->op_pmreplstart);
79072805
LW		 4874 break;
4875
a0d0e21e 4876 case OP_EXEC:
c07a80fd 4877 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4878 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
4879 if (o->op_next->op_sibling &&
20408e3c
GS		 4880 o->op_next->op_sibling->op_type != OP_EXIT &&
4881 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e
LW		 4882 o->op_next->op_sibling->op_type != OP_DIE) {
4883 line_t oldline = curcop->cop_line;
4884
4885 curcop->cop_line = ((COP*)o->op_next)->cop_line;
4886 warn("Statement unlikely to be reached");
4887 warn("(Maybe you meant system() when you said exec()?)\n");
4888 curcop->cop_line = oldline;
4889 }
4890 }
4891 break;
aeea060c 4892
c750a3ec
MB		 4893 case OP_HELEM: {
4894 UNOP *rop;
4895 SV *lexname;
4896 GV **fields;
4897 SV **svp, **indsvp;
4898 I32 ind;
4899 char *key;
4900 STRLEN keylen;
aeea060c 4901
c750a3ec
MB		 4902 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
4903 || ((BINOP*)o)->op_last->op_type != OP_CONST)
4904 break;
4905 rop = (UNOP*)((BINOP*)o)->op_first;
4906 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
4907 break;
4908 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
4909 if (!SvOBJECT(lexname))
4910 break;
5196be3e 4911 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 4912 if (!fields || !GvHV(*fields))
4913 break;
4914 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
4915 key = SvPV(*svp, keylen);
4916 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
4917 if (!indsvp) {
4918 croak("No such field \"%s\" in variable %s of type %s",
4919 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
4920 }
4921 ind = SvIV(*indsvp);
4922 if (ind < 1)
4923 croak("Bad index while coercing array into hash");
4924 rop->op_type = OP_RV2AV;
4925 rop->op_ppaddr = ppaddr[OP_RV2AV];
4926 o->op_type = OP_AELEM;
4927 o->op_ppaddr = ppaddr[OP_AELEM];
4928 SvREFCNT_dec(*svp);
4929 *svp = newSViv(ind);
4930 break;
4931 }
4932
79072805 4933 default:
c07a80fd 4934 o->op_seq = op_seqmax++;
79072805
LW		 4935 break;
4936 }
a0d0e21e 4937 oldop = o;
79072805 4938 }
a0d0e21e 4939 LEAVE;
79072805 4940}
Unnamed repository; edit this file 'description' to name the repository.