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[win32] merge change#897 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
79072805 1048OP *
8ac85365 1049mod(OP *o, I32 type)
79072805 1050{
11343788 1051 dTHR;
79072805
LW		 1052 OP *kid;
1053 SV *sv;
1054
11343788
MB		 1055 if (!o || error_count)
1056 return o;
79072805 1057
11343788 1058 switch (o->op_type) {
68dc0745 1059 case OP_UNDEF:
3e3baf6d 1060 modcount++;
5dc0d613 1061 return o;
a0d0e21e 1062 case OP_CONST:
11343788 1063 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1064 goto nomod;
1065 if (eval_start && eval_start->op_type == OP_CONST) {
1066 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1067 eval_start = 0;
1068 }
1069 else if (!type) {
1070 SAVEI32(compiling.cop_arybase);
748a9306 1071 compiling.cop_arybase = 0;
a0d0e21e
LW		 1072 }
1073 else if (type == OP_REFGEN)
1074 goto nomod;
1075 else
1076 croak("That use of $[ is unsupported");
1077 break;
5f05dabc 1078 case OP_STUB:
5196be3e 1079 if (o->op_flags & OPf_PARENS)
5f05dabc 1080 break;
1081 goto nomod;
a0d0e21e
LW		 1082 case OP_ENTERSUB:
1083 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1084 !(o->op_flags & OPf_STACKED)) {
1085 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1086 o->op_ppaddr = ppaddr[OP_RV2CV];
1087 assert(cUNOPo->op_first->op_type == OP_NULL);
1088 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1089 break;
1090 }
1091 /* FALL THROUGH */
1092 default:
a0d0e21e
LW		 1093 nomod:
1094 /* grep, foreach, subcalls, refgen */
1095 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1096 break;
46fc3d4c 1097 yyerror(form("Can't modify %s in %s",
5dc0d613 1098 op_desc[o->op_type],
46fc3d4c 1099 type ? op_desc[type] : "local"));
11343788 1100 return o;
79072805 1101
a0d0e21e
LW		 1102 case OP_PREINC:
1103 case OP_PREDEC:
1104 case OP_POW:
1105 case OP_MULTIPLY:
1106 case OP_DIVIDE:
1107 case OP_MODULO:
1108 case OP_REPEAT:
1109 case OP_ADD:
1110 case OP_SUBTRACT:
1111 case OP_CONCAT:
1112 case OP_LEFT_SHIFT:
1113 case OP_RIGHT_SHIFT:
1114 case OP_BIT_AND:
1115 case OP_BIT_XOR:
1116 case OP_BIT_OR:
1117 case OP_I_MULTIPLY:
1118 case OP_I_DIVIDE:
1119 case OP_I_MODULO:
1120 case OP_I_ADD:
1121 case OP_I_SUBTRACT:
11343788 1122 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1123 goto nomod;
1124 modcount++;
1125 break;
1126
79072805 1127 case OP_COND_EXPR:
11343788 1128 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1129 mod(kid, type);
79072805
LW		 1130 break;
1131
1132 case OP_RV2AV:
1133 case OP_RV2HV:
93af7a87 1134 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1135 croak("Can't localize through a reference");
11343788 1136 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1137 modcount = 10000;
11343788 1138 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1139 }
1140 /* FALL THROUGH */
79072805 1141 case OP_RV2GV:
5dc0d613 1142 if (scalar_mod_type(o, type))
3fe9a6f1 1143 goto nomod;
11343788 1144 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1145 /* FALL THROUGH */
1146 case OP_AASSIGN:
1147 case OP_ASLICE:
1148 case OP_HSLICE:
93a17b20
LW		 1149 case OP_NEXTSTATE:
1150 case OP_DBSTATE:
a0d0e21e
LW		 1151 case OP_REFGEN:
1152 case OP_CHOMP:
463ee0b2 1153 modcount = 10000;
79072805 1154 break;
463ee0b2 1155 case OP_RV2SV:
11343788 1156 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1157 croak("Can't localize through a reference");
aeea060c 1158 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1159 /* FALL THROUGH */
79072805 1160 case OP_GV:
463ee0b2 1161 case OP_AV2ARYLEN:
85aff577 1162 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1163 case OP_SASSIGN:
8990e307
LW		 1164 case OP_AELEMFAST:
1165 modcount++;
1166 break;
1167
748a9306
LW		 1168 case OP_PADAV:
1169 case OP_PADHV:
1170 modcount = 10000;
5196be3e
MB		 1171 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1172 return o; /* Treat \(@foo) like ordinary list. */
1173 if (scalar_mod_type(o, type))
3fe9a6f1 1174 goto nomod;
748a9306
LW		 1175 /* FALL THROUGH */
1176 case OP_PADSV:
1177 modcount++;
1178 if (!type)
1179 croak("Can't localize lexical variable %s",
11343788 1180 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1181 break;
1182
554b3eca 1183#ifdef USE_THREADS
2faa37cc 1184 case OP_THREADSV:
554b3eca 1185 modcount++; /* XXX ??? */
554b3eca
MB		 1186 break;
1187#endif /* USE_THREADS */
1188
748a9306
LW		 1189 case OP_PUSHMARK:
1190 break;
a0d0e21e 1191
69969c6f
SB		 1192 case OP_KEYS:
1193 if (type != OP_SASSIGN)
1194 goto nomod;
5f05dabc 1195 /* FALL THROUGH */
a0d0e21e 1196 case OP_POS:
463ee0b2 1197 case OP_VEC:
a0d0e21e 1198 case OP_SUBSTR:
11343788
MB		 1199 pad_free(o->op_targ);
1200 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1201 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1202 if (o->op_flags & OPf_KIDS)
1203 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1204 break;
a0d0e21e 1205
463ee0b2
LW		 1206 case OP_AELEM:
1207 case OP_HELEM:
11343788 1208 ref(cBINOPo->op_first, o->op_type);
68dc0745 1209 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1210 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1211 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1212 modcount++;
463ee0b2
LW		 1213 break;
1214
1215 case OP_SCOPE:
1216 case OP_LEAVE:
1217 case OP_ENTER:
11343788
MB		 1218 if (o->op_flags & OPf_KIDS)
1219 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1220 break;
1221
1222 case OP_NULL:
11343788 1223 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1224 break;
11343788
MB		 1225 if (o->op_targ != OP_LIST) {
1226 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1227 break;
1228 }
1229 /* FALL THROUGH */
463ee0b2 1230 case OP_LIST:
11343788 1231 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1232 mod(kid, type);
1233 break;
1234 }
11343788 1235 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1236
1237 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1238 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1239 else if (!type) {
11343788
MB		 1240 o->op_private |= OPpLVAL_INTRO;
1241 o->op_flags &= ~OPf_SPECIAL;
ca48fea7 1242 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1243 }
a0d0e21e 1244 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1245 o->op_flags |= OPf_REF;
1246 return o;
463ee0b2
LW		 1247}
1248
3fe9a6f1 1249static bool
8ac85365 1250scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1251{
1252 switch (type) {
1253 case OP_SASSIGN:
5196be3e 1254 if (o->op_type == OP_RV2GV)
3fe9a6f1 1255 return FALSE;
1256 /* FALL THROUGH */
1257 case OP_PREINC:
1258 case OP_PREDEC:
1259 case OP_POSTINC:
1260 case OP_POSTDEC:
1261 case OP_I_PREINC:
1262 case OP_I_PREDEC:
1263 case OP_I_POSTINC:
1264 case OP_I_POSTDEC:
1265 case OP_POW:
1266 case OP_MULTIPLY:
1267 case OP_DIVIDE:
1268 case OP_MODULO:
1269 case OP_REPEAT:
1270 case OP_ADD:
1271 case OP_SUBTRACT:
1272 case OP_I_MULTIPLY:
1273 case OP_I_DIVIDE:
1274 case OP_I_MODULO:
1275 case OP_I_ADD:
1276 case OP_I_SUBTRACT:
1277 case OP_LEFT_SHIFT:
1278 case OP_RIGHT_SHIFT:
1279 case OP_BIT_AND:
1280 case OP_BIT_XOR:
1281 case OP_BIT_OR:
1282 case OP_CONCAT:
1283 case OP_SUBST:
1284 case OP_TRANS:
1285 case OP_ANDASSIGN: /* may work later */
1286 case OP_ORASSIGN: /* may work later */
1287 return TRUE;
1288 default:
1289 return FALSE;
1290 }
1291}
1292
463ee0b2 1293OP *
8ac85365 1294refkids(OP *o, I32 type)
463ee0b2
LW		 1295{
1296 OP *kid;
11343788
MB		 1297 if (o && o->op_flags & OPf_KIDS) {
1298 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1299 ref(kid, type);
1300 }
11343788 1301 return o;
463ee0b2
LW		 1302}
1303
1304OP *
8ac85365 1305ref(OP *o, I32 type)
463ee0b2
LW		 1306{
1307 OP *kid;
463ee0b2 1308
11343788
MB		 1309 if (!o || error_count)
1310 return o;
463ee0b2 1311
11343788 1312 switch (o->op_type) {
a0d0e21e 1313 case OP_ENTERSUB:
e55aaa0e 1314 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1315 !(o->op_flags & OPf_STACKED)) {
1316 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1317 o->op_ppaddr = ppaddr[OP_RV2CV];
1318 assert(cUNOPo->op_first->op_type == OP_NULL);
1319 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1320 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1321 }
1322 break;
aeea060c 1323
463ee0b2 1324 case OP_COND_EXPR:
11343788 1325 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1326 ref(kid, type);
1327 break;
8990e307 1328 case OP_RV2SV:
11343788 1329 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1330 /* FALL THROUGH */
1331 case OP_PADSV:
5f05dabc 1332 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1333 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1334 : type == OP_RV2HV ? OPpDEREF_HV
1335 : OPpDEREF_SV);
11343788 1336 o->op_flags |= OPf_MOD;
a0d0e21e 1337 }
8990e307
LW		 1338 break;
1339
2faa37cc 1340 case OP_THREADSV:
a863c7d1
MB		 1341 o->op_flags |= OPf_MOD; /* XXX ??? */
1342 break;
1343
463ee0b2
LW		 1344 case OP_RV2AV:
1345 case OP_RV2HV:
aeea060c 1346 o->op_flags |= OPf_REF;
8990e307 1347 /* FALL THROUGH */
463ee0b2 1348 case OP_RV2GV:
11343788 1349 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1350 break;
8990e307 1351
463ee0b2
LW		 1352 case OP_PADAV:
1353 case OP_PADHV:
aeea060c 1354 o->op_flags |= OPf_REF;
79072805 1355 break;
aeea060c 1356
8990e307 1357 case OP_SCALAR:
79072805 1358 case OP_NULL:
11343788 1359 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1360 break;
11343788 1361 ref(cBINOPo->op_first, type);
79072805
LW		 1362 break;
1363 case OP_AELEM:
1364 case OP_HELEM:
11343788 1365 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1366 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1367 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1368 : type == OP_RV2HV ? OPpDEREF_HV
1369 : OPpDEREF_SV);
11343788 1370 o->op_flags |= OPf_MOD;
8990e307 1371 }
79072805
LW		 1372 break;
1373
463ee0b2 1374 case OP_SCOPE:
79072805
LW		 1375 case OP_LEAVE:
1376 case OP_ENTER:
8990e307 1377 case OP_LIST:
11343788 1378 if (!(o->op_flags & OPf_KIDS))
79072805 1379 break;
11343788 1380 ref(cLISTOPo->op_last, type);
79072805 1381 break;
a0d0e21e
LW		 1382 default:
1383 break;
79072805 1384 }
11343788 1385 return scalar(o);
8990e307 1386
79072805
LW		 1387}
1388
1389OP *
8ac85365 1390my(OP *o)
93a17b20
LW		 1391{
1392 OP *kid;
93a17b20
LW		 1393 I32 type;
1394
11343788
MB		 1395 if (!o || error_count)
1396 return o;
93a17b20 1397
11343788 1398 type = o->op_type;
93a17b20 1399 if (type == OP_LIST) {
11343788 1400 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1401 my(kid);
dab48698 1402 } else if (type == OP_UNDEF) {
7766148a 1403 return o;
dab48698 1404 } else if (type != OP_PADSV &&
93a17b20
LW		 1405 type != OP_PADAV &&
1406 type != OP_PADHV &&
1407 type != OP_PUSHMARK)
1408 {
5dc0d613 1409 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1410 return o;
93a17b20 1411 }
11343788
MB		 1412 o->op_flags |= OPf_MOD;
1413 o->op_private |= OPpLVAL_INTRO;
1414 return o;
93a17b20
LW		 1415}
1416
1417OP *
8ac85365 1418sawparens(OP *o)
79072805
LW		 1419{
1420 if (o)
1421 o->op_flags |= OPf_PARENS;
1422 return o;
1423}
1424
1425OP *
8ac85365 1426bind_match(I32 type, OP *left, OP *right)
79072805 1427{
11343788 1428 OP *o;
79072805 1429
2ae324a7 1430 if (dowarn &&
1431 (left->op_type == OP_RV2AV ||
1432 left->op_type == OP_RV2HV ||
1433 left->op_type == OP_PADAV ||
1434 left->op_type == OP_PADHV)) {
1435 char *desc = op_desc[(right->op_type == OP_SUBST ||
1436 right->op_type == OP_TRANS)
1437 ? right->op_type : OP_MATCH];
1438 char *sample = ((left->op_type == OP_RV2AV ||
1439 left->op_type == OP_PADAV)
1440 ? "@array" : "%hash");
1441 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1442 }
1443
79072805
LW		 1444 if (right->op_type == OP_MATCH ||
1445 right->op_type == OP_SUBST ||
1446 right->op_type == OP_TRANS) {
1447 right->op_flags |= OPf_STACKED;
1448 if (right->op_type != OP_MATCH)
463ee0b2 1449 left = mod(left, right->op_type);
79072805 1450 if (right->op_type == OP_TRANS)
11343788 1451 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1452 else
11343788 1453 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1454 if (type == OP_NOT)
11343788
MB		 1455 return newUNOP(OP_NOT, 0, scalar(o));
1456 return o;
79072805
LW		 1457 }
1458 else
1459 return bind_match(type, left,
1460 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1461}
1462
1463OP *
8ac85365 1464invert(OP *o)
79072805 1465{
11343788
MB		 1466 if (!o)
1467 return o;
79072805 1468 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1469 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1470}
1471
1472OP *
8ac85365 1473scope(OP *o)
79072805
LW		 1474{
1475 if (o) {
84902520 1476 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1477 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1478 o->op_type = OP_LEAVE;
1479 o->op_ppaddr = ppaddr[OP_LEAVE];
1480 }
1481 else {
1482 if (o->op_type == OP_LINESEQ) {
1483 OP *kid;
1484 o->op_type = OP_SCOPE;
1485 o->op_ppaddr = ppaddr[OP_SCOPE];
1486 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1487 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1488 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1489 null(kid);
748a9306 1490 }
463ee0b2
LW		 1491 }
1492 else
748a9306 1493 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1494 }
79072805
LW		 1495 }
1496 return o;
1497}
1498
a0d0e21e 1499int
8ac85365 1500block_start(int full)
79072805 1501{
11343788 1502 dTHR;
a0d0e21e 1503 int retval = savestack_ix;
55497cff 1504 SAVEI32(comppad_name_floor);
1505 if (full) {
93965878 1506 if ((comppad_name_fill = AvFILLp(comppad_name)) > 0)
55497cff 1507 comppad_name_floor = comppad_name_fill;
1508 else
1509 comppad_name_floor = 0;
1510 }
1511 SAVEI32(min_intro_pending);
1512 SAVEI32(max_intro_pending);
a0d0e21e 1513 min_intro_pending = 0;
55497cff 1514 SAVEI32(comppad_name_fill);
1515 SAVEI32(padix_floor);
a0d0e21e
LW		 1516 padix_floor = padix;
1517 pad_reset_pending = FALSE;
55497cff 1518 SAVEI32(hints);
a0d0e21e
LW		 1519 hints &= ~HINT_BLOCK_SCOPE;
1520 return retval;
1521}
1522
1523OP*
8ac85365 1524block_end(I32 floor, OP *seq)
a0d0e21e 1525{
11343788 1526 dTHR;
a0d0e21e
LW		 1527 int needblockscope = hints & HINT_BLOCK_SCOPE;
1528 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1529 LEAVE_SCOPE(floor);
1530 pad_reset_pending = FALSE;
1531 if (needblockscope)
1532 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1533 pad_leavemy(comppad_name_fill);
bbce6d69 1534 cop_seqmax++;
a0d0e21e
LW		 1535 return retval;
1536}
1537
54b9620d
MB		 1538static OP *
1539newDEFSVOP(void)
1540{
1541#ifdef USE_THREADS
1542 OP *o = newOP(OP_THREADSV, 0);
1543 o->op_targ = find_threadsv("_");
1544 return o;
1545#else
1546 return newSVREF(newGVOP(OP_GV, 0, defgv));
1547#endif /* USE_THREADS */
1548}
1549
a0d0e21e 1550void
8ac85365 1551newPROG(OP *o)
a0d0e21e 1552{
11343788 1553 dTHR;
a0d0e21e 1554 if (in_eval) {
5dc0d613 1555 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1556 eval_start = linklist(eval_root);
1557 eval_root->op_next = 0;
1558 peep(eval_start);
1559 }
1560 else {
5dc0d613 1561 if (!o)
a0d0e21e 1562 return;
11343788 1563 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1564 curcop = &compiling;
1565 main_start = LINKLIST(main_root);
1566 main_root->op_next = 0;
1567 peep(main_start);
748a9306 1568 compcv = 0;
3841441e 1569
4fdae800 1570 /* Register with debugger */
84902520 1571 if (PERLDB_INTER) {
3841441e 1572 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1573 if (cv) {
1574 dSP;
924508f0 1575 PUSHMARK(SP);
3841441e
CS		 1576 XPUSHs((SV*)compiling.cop_filegv);
1577 PUTBACK;
1578 perl_call_sv((SV*)cv, G_DISCARD);
1579 }
1580 }
79072805 1581 }
79072805
LW		 1582}
1583
1584OP *
8ac85365 1585localize(OP *o, I32 lex)
79072805
LW		 1586{
1587 if (o->op_flags & OPf_PARENS)
1588 list(o);
8990e307 1589 else {
8990e307
LW		 1590 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1591 char *s;
1592 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1593 if (*s == ';' || *s == '=')
8990e307
LW		 1594 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1595 }
1596 }
93a17b20 1597 in_my = FALSE;
c750a3ec 1598 in_my_stash = Nullhv;
93a17b20
LW		 1599 if (lex)
1600 return my(o);
1601 else
463ee0b2 1602 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1603}
1604
1605OP *
8ac85365 1606jmaybe(OP *o)
79072805
LW		 1607{
1608 if (o->op_type == OP_LIST) {
554b3eca
MB		 1609 OP *o2;
1610#ifdef USE_THREADS
2faa37cc 1611 o2 = newOP(OP_THREADSV, 0);
54b9620d 1612 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1613#else
1614 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1615#endif /* USE_THREADS */
1616 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1617 }
1618 return o;
1619}
1620
1621OP *
8ac85365 1622fold_constants(register OP *o)
79072805 1623{
11343788 1624 dTHR;
79072805
LW		 1625 register OP *curop;
1626 I32 type = o->op_type;
748a9306 1627 SV *sv;
79072805
LW		 1628
1629 if (opargs[type] & OA_RETSCALAR)
1630 scalar(o);
1631 if (opargs[type] & OA_TARGET)
ed6116ce 1632 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1633
85e6fe83 1634 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1635 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1636
79072805
LW		 1637 if (!(opargs[type] & OA_FOLDCONST))
1638 goto nope;
1639
de939608
CS		 1640 switch (type) {
1641 case OP_SPRINTF:
1642 case OP_UCFIRST:
1643 case OP_LCFIRST:
1644 case OP_UC:
1645 case OP_LC:
69dcf70c
MB		 1646 case OP_SLT:
1647 case OP_SGT:
1648 case OP_SLE:
1649 case OP_SGE:
1650 case OP_SCMP:
1651
de939608
CS		 1652 if (o->op_private & OPpLOCALE)
1653 goto nope;
1654 }
1655
a0d0e21e
LW		 1656 if (error_count)
1657 goto nope; /* Don't try to run w/ errors */
1658
79072805 1659 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1660 if (curop->op_type != OP_CONST &&
1661 curop->op_type != OP_LIST &&
1662 curop->op_type != OP_SCALAR &&
a0d0e21e 1663 curop->op_type != OP_NULL &&
93a17b20 1664 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1665 goto nope;
1666 }
1667 }
1668
1669 curop = LINKLIST(o);
1670 o->op_next = 0;
1671 op = curop;
8da795c6 1672 runops();
748a9306
LW		 1673 sv = *(stack_sp--);
1674 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1675 pad_swipe(o->op_targ);
748a9306
LW		 1676 else if (SvTEMP(sv)) { /* grab mortal temp? */
1677 (void)SvREFCNT_inc(sv);
1678 SvTEMP_off(sv);
85e6fe83 1679 }
79072805
LW		 1680 op_free(o);
1681 if (type == OP_RV2GV)
b1cb66bf 1682 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306
LW		 1683 else {
1684 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK) {
1685 IV iv = SvIV(sv);
1686 if ((double)iv == SvNV(sv)) { /* can we smush double to int */
1687 SvREFCNT_dec(sv);
1688 sv = newSViv(iv);
1689 }
b1cb66bf 1690 else
1691 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1692 }
1693 return newSVOP(OP_CONST, 0, sv);
1694 }
aeea060c 1695
79072805
LW		 1696 nope:
1697 if (!(opargs[type] & OA_OTHERINT))
1698 return o;
79072805 1699
85e6fe83 1700 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1701 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1702 return o;
1703
1704 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1705 if (curop->op_type == OP_CONST) {
b1cb66bf 1706 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1707 continue;
1708 return o;
1709 }
1710 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1711 continue;
1712 return o;
1713 }
a0d0e21e 1714 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1715 }
1716
79072805
LW		 1717 return o;
1718}
1719
1720OP *
8ac85365 1721gen_constant_list(register OP *o)
79072805 1722{
11343788 1723 dTHR;
79072805 1724 register OP *curop;
79072805 1725 I32 oldtmps_floor = tmps_floor;
79072805 1726
a0d0e21e
LW		 1727 list(o);
1728 if (error_count)
1729 return o; /* Don't attempt to run with errors */
1730
1731 op = curop = LINKLIST(o);
1732 o->op_next = 0;
11343788 1733 pp_pushmark(ARGS);
8da795c6 1734 runops();
a0d0e21e 1735 op = curop;
11343788 1736 pp_anonlist(ARGS);
79072805 1737 tmps_floor = oldtmps_floor;
79072805
LW		 1738
1739 o->op_type = OP_RV2AV;
1740 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1741 curop = ((UNOP*)o)->op_first;
a0d0e21e 1742 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1743 op_free(curop);
79072805
LW		 1744 linklist(o);
1745 return list(o);
1746}
1747
1748OP *
8ac85365 1749convert(I32 type, I32 flags, OP *o)
79072805
LW		 1750{
1751 OP *kid;
a0d0e21e 1752 OP *last = 0;
79072805 1753
11343788
MB		 1754 if (!o || o->op_type != OP_LIST)
1755 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1756 else
5dc0d613 1757 o->op_flags &= ~OPf_WANT;
79072805 1758
8990e307 1759 if (!(opargs[type] & OA_MARK))
11343788 1760 null(cLISTOPo->op_first);
8990e307 1761
11343788
MB		 1762 o->op_type = type;
1763 o->op_ppaddr = ppaddr[type];
1764 o->op_flags |= flags;
79072805 1765
11343788
MB		 1766 o = CHECKOP(type, o);
1767 if (o->op_type != type)
1768 return o;
79072805 1769
11343788 1770 if (cLISTOPo->op_children < 7) {
79072805 1771 /* XXX do we really need to do this if we're done appending?? */
11343788 1772 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1773 last = kid;
11343788 1774 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1775 }
1776
11343788 1777 return fold_constants(o);
79072805
LW		 1778}
1779
1780/* List constructors */
1781
1782OP *
8ac85365 1783append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1784{
1785 if (!first)
1786 return last;
8990e307
LW		 1787
1788 if (!last)
79072805 1789 return first;
8990e307 1790
a0d0e21e
LW		 1791 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1792 return newLISTOP(type, 0, first, last);
79072805 1793
a0d0e21e
LW		 1794 if (first->op_flags & OPf_KIDS)
1795 ((LISTOP*)first)->op_last->op_sibling = last;
1796 else {
1797 first->op_flags |= OPf_KIDS;
1798 ((LISTOP*)first)->op_first = last;
1799 }
1800 ((LISTOP*)first)->op_last = last;
1801 ((LISTOP*)first)->op_children++;
1802 return first;
79072805
LW		 1803}
1804
1805OP *
8ac85365 1806append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1807{
1808 if (!first)
1809 return (OP*)last;
8990e307
LW		 1810
1811 if (!last)
79072805 1812 return (OP*)first;
8990e307
LW		 1813
1814 if (first->op_type != type)
79072805 1815 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1816
1817 if (last->op_type != type)
79072805
LW		 1818 return append_elem(type, (OP*)first, (OP*)last);
1819
1820 first->op_last->op_sibling = last->op_first;
1821 first->op_last = last->op_last;
1822 first->op_children += last->op_children;
1823 if (first->op_children)
1824 last->op_flags |= OPf_KIDS;
1825
1826 Safefree(last);
1827 return (OP*)first;
1828}
1829
1830OP *
8ac85365 1831prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1832{
1833 if (!first)
1834 return last;
8990e307
LW		 1835
1836 if (!last)
79072805 1837 return first;
8990e307
LW		 1838
1839 if (last->op_type == type) {
1840 if (type == OP_LIST) { /* already a PUSHMARK there */
1841 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1842 ((LISTOP*)last)->op_first->op_sibling = first;
1843 }
1844 else {
1845 if (!(last->op_flags & OPf_KIDS)) {
1846 ((LISTOP*)last)->op_last = first;
1847 last->op_flags |= OPf_KIDS;
1848 }
1849 first->op_sibling = ((LISTOP*)last)->op_first;
1850 ((LISTOP*)last)->op_first = first;
79072805 1851 }
79072805
LW		 1852 ((LISTOP*)last)->op_children++;
1853 return last;
1854 }
1855
1856 return newLISTOP(type, 0, first, last);
1857}
1858
1859/* Constructors */
1860
1861OP *
8ac85365 1862newNULLLIST(void)
79072805 1863{
8990e307
LW		 1864 return newOP(OP_STUB, 0);
1865}
1866
1867OP *
8ac85365 1868force_list(OP *o)
8990e307 1869{
11343788
MB		 1870 if (!o || o->op_type != OP_LIST)
1871 o = newLISTOP(OP_LIST, 0, o, Nullop);
1872 null(o);
1873 return o;
79072805
LW		 1874}
1875
1876OP *
8ac85365 1877newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1878{
1879 LISTOP *listop;
1880
1881 Newz(1101, listop, 1, LISTOP);
1882
1883 listop->op_type = type;
1884 listop->op_ppaddr = ppaddr[type];
1885 listop->op_children = (first != 0) + (last != 0);
1886 listop->op_flags = flags;
79072805
LW		 1887
1888 if (!last && first)
1889 last = first;
1890 else if (!first && last)
1891 first = last;
8990e307
LW		 1892 else if (first)
1893 first->op_sibling = last;
79072805
LW		 1894 listop->op_first = first;
1895 listop->op_last = last;
8990e307
LW		 1896 if (type == OP_LIST) {
1897 OP* pushop;
1898 pushop = newOP(OP_PUSHMARK, 0);
1899 pushop->op_sibling = first;
1900 listop->op_first = pushop;
1901 listop->op_flags |= OPf_KIDS;
1902 if (!last)
1903 listop->op_last = pushop;
1904 }
1905 else if (listop->op_children)
1906 listop->op_flags |= OPf_KIDS;
79072805
LW		 1907
1908 return (OP*)listop;
1909}
1910
1911OP *
8ac85365 1912newOP(I32 type, I32 flags)
79072805 1913{
11343788
MB		 1914 OP *o;
1915 Newz(1101, o, 1, OP);
1916 o->op_type = type;
1917 o->op_ppaddr = ppaddr[type];
1918 o->op_flags = flags;
79072805 1919
11343788
MB		 1920 o->op_next = o;
1921 o->op_private = 0 + (flags >> 8);
79072805 1922 if (opargs[type] & OA_RETSCALAR)
11343788 1923 scalar(o);
79072805 1924 if (opargs[type] & OA_TARGET)
11343788
MB		 1925 o->op_targ = pad_alloc(type, SVs_PADTMP);
1926 return CHECKOP(type, o);
79072805
LW		 1927}
1928
1929OP *
8ac85365 1930newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1931{
1932 UNOP *unop;
1933
93a17b20 1934 if (!first)
aeea060c 1935 first = newOP(OP_STUB, 0);
8990e307
LW		 1936 if (opargs[type] & OA_MARK)
1937 first = force_list(first);
93a17b20 1938
79072805
LW		 1939 Newz(1101, unop, 1, UNOP);
1940 unop->op_type = type;
1941 unop->op_ppaddr = ppaddr[type];
1942 unop->op_first = first;
1943 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1944 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1945#if 1
1946 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1947 first->op_type = OP_PUSHRE;
1948 first->op_ppaddr = ppaddr[OP_PUSHRE];
1949 }
1950#endif
e50aee73 1951 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1952 if (unop->op_next)
1953 return (OP*)unop;
1954
a0d0e21e 1955 return fold_constants((OP *) unop);
79072805
LW		 1956}
1957
1958OP *
8ac85365 1959newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1960{
1961 BINOP *binop;
1962 Newz(1101, binop, 1, BINOP);
1963
1964 if (!first)
1965 first = newOP(OP_NULL, 0);
1966
1967 binop->op_type = type;
1968 binop->op_ppaddr = ppaddr[type];
1969 binop->op_first = first;
1970 binop->op_flags = flags | OPf_KIDS;
1971 if (!last) {
1972 last = first;
c07a80fd 1973 binop->op_private = 1 | (flags >> 8);
79072805
LW		 1974 }
1975 else {
c07a80fd 1976 binop->op_private = 2 | (flags >> 8);
79072805
LW		 1977 first->op_sibling = last;
1978 }
1979
e50aee73 1980 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 1981 if (binop->op_next)
1982 return (OP*)binop;
1983
1984 binop->op_last = last = binop->op_first->op_sibling;
1985
a0d0e21e 1986 return fold_constants((OP *)binop);
79072805
LW		 1987}
1988
1989OP *
8ac85365 1990pmtrans(OP *o, OP *expr, OP *repl)
79072805 1991{
79072805
LW		 1992 SV *tstr = ((SVOP*)expr)->op_sv;
1993 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 1994 STRLEN tlen;
1995 STRLEN rlen;
ec49126f 1996 register U8 *t = (U8*)SvPV(tstr, tlen);
1997 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 1998 register I32 i;
1999 register I32 j;
8ac85365 2000 I32 Delete;
79072805 2001 I32 complement;
5d06d08e 2002 I32 squash;
79072805
LW		 2003 register short *tbl;
2004
11343788
MB		 2005 tbl = (short*)cPVOPo->op_pv;
2006 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 2007 Delete = o->op_private & OPpTRANS_DELETE;
5d06d08e 2008 squash = o->op_private & OPpTRANS_SQUASH;
79072805
LW		 2009
2010 if (complement) {
2011 Zero(tbl, 256, short);
2012 for (i = 0; i < tlen; i++)
ec49126f 2013 tbl[t[i]] = -1;
79072805
LW		 2014 for (i = 0, j = 0; i < 256; i++) {
2015 if (!tbl[i]) {
2016 if (j >= rlen) {
8ac85365 2017 if (Delete)
79072805
LW		 2018 tbl[i] = -2;
2019 else if (rlen)
ec49126f 2020 tbl[i] = r[j-1];
79072805
LW		 2021 else
2022 tbl[i] = i;
2023 }
2024 else
ec49126f 2025 tbl[i] = r[j++];
79072805
LW		 2026 }
2027 }
2028 }
2029 else {
8ac85365 2030 if (!rlen && !Delete) {
79072805 2031 r = t; rlen = tlen;
5d06d08e
MB		 2032 if (!squash)
2033 o->op_private |= OPpTRANS_COUNTONLY;
79072805
LW		 2034 }
2035 for (i = 0; i < 256; i++)
2036 tbl[i] = -1;
2037 for (i = 0, j = 0; i < tlen; i++,j++) {
2038 if (j >= rlen) {
8ac85365 2039 if (Delete) {
ec49126f 2040 if (tbl[t[i]] == -1)
2041 tbl[t[i]] = -2;
79072805
LW		 2042 continue;
2043 }
2044 --j;
2045 }
ec49126f 2046 if (tbl[t[i]] == -1)
2047 tbl[t[i]] = r[j];
79072805
LW		 2048 }
2049 }
2050 op_free(expr);
2051 op_free(repl);
2052
11343788 2053 return o;
79072805
LW		 2054}
2055
2056OP *
8ac85365 2057newPMOP(I32 type, I32 flags)
79072805 2058{
11343788 2059 dTHR;
79072805
LW		 2060 PMOP *pmop;
2061
2062 Newz(1101, pmop, 1, PMOP);
2063 pmop->op_type = type;
2064 pmop->op_ppaddr = ppaddr[type];
2065 pmop->op_flags = flags;
c07a80fd 2066 pmop->op_private = 0 | (flags >> 8);
79072805 2067
36477c24 2068 if (hints & HINT_LOCALE)
2069 pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE);
2070
79072805 2071 /* link into pm list */
a0d0e21e 2072 if (type != OP_TRANS && curstash) {
79072805
LW		 2073 pmop->op_pmnext = HvPMROOT(curstash);
2074 HvPMROOT(curstash) = pmop;
2075 }
2076
2077 return (OP*)pmop;
2078}
2079
2080OP *
8ac85365 2081pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2082{
2083 PMOP *pm;
2084 LOGOP *rcop;
2085
11343788
MB		 2086 if (o->op_type == OP_TRANS)
2087 return pmtrans(o, expr, repl);
79072805 2088
3e3baf6d 2089 hints |= HINT_BLOCK_SCOPE;
11343788 2090 pm = (PMOP*)o;
79072805
LW		 2091
2092 if (expr->op_type == OP_CONST) {
463ee0b2 2093 STRLEN plen;
79072805 2094 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2095 char *p = SvPV(pat, plen);
11343788 2096 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2097 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2098 p = SvPV(pat, plen);
79072805
LW		 2099 pm->op_pmflags |= PMf_SKIPWHITE;
2100 }
e50aee73 2101 pm->op_pmregexp = pregcomp(p, p + plen, pm);
aeea060c 2102 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2103 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2104 op_free(expr);
2105 }
2106 else {
463ee0b2
LW		 2107 if (pm->op_pmflags & PMf_KEEP)
2108 expr = newUNOP(OP_REGCMAYBE,0,expr);
2109
79072805
LW		 2110 Newz(1101, rcop, 1, LOGOP);
2111 rcop->op_type = OP_REGCOMP;
2112 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2113 rcop->op_first = scalar(expr);
2114 rcop->op_flags |= OPf_KIDS;
2115 rcop->op_private = 1;
11343788 2116 rcop->op_other = o;
79072805
LW		 2117
2118 /* establish postfix order */
463ee0b2
LW		 2119 if (pm->op_pmflags & PMf_KEEP) {
2120 LINKLIST(expr);
2121 rcop->op_next = expr;
2122 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2123 }
2124 else {
2125 rcop->op_next = LINKLIST(expr);
2126 expr->op_next = (OP*)rcop;
2127 }
79072805 2128
11343788 2129 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2130 }
2131
2132 if (repl) {
748a9306
LW		 2133 OP *curop;
2134 if (pm->op_pmflags & PMf_EVAL)
2135 curop = 0;
554b3eca 2136#ifdef USE_THREADS
2faa37cc 2137 else if (repl->op_type == OP_THREADSV
554b3eca 2138 && strchr("&`'123456789+",
54b9620d 2139 threadsv_names[repl->op_targ]))
554b3eca
MB		 2140 {
2141 curop = 0;
2142 }
2143#endif /* USE_THREADS */
748a9306
LW		 2144 else if (repl->op_type == OP_CONST)
2145 curop = repl;
79072805 2146 else {
79072805
LW		 2147 OP *lastop = 0;
2148 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2149 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2150#ifdef USE_THREADS
2faa37cc 2151 if (curop->op_type == OP_THREADSV
554b3eca
MB		 2152 && strchr("&`'123456789+", curop->op_private)) {
2153 break;
2154 }
2155#else
79072805
LW		 2156 if (curop->op_type == OP_GV) {
2157 GV *gv = ((GVOP*)curop)->op_gv;
93a17b20 2158 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2159 break;
2160 }
554b3eca 2161#endif /* USE_THREADS */
79072805
LW		 2162 else if (curop->op_type == OP_RV2CV)
2163 break;
2164 else if (curop->op_type == OP_RV2SV ||
2165 curop->op_type == OP_RV2AV ||
2166 curop->op_type == OP_RV2HV ||
2167 curop->op_type == OP_RV2GV) {
2168 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2169 break;
2170 }
748a9306
LW		 2171 else if (curop->op_type == OP_PADSV ||
2172 curop->op_type == OP_PADAV ||
2173 curop->op_type == OP_PADHV ||
554b3eca 2174 curop->op_type == OP_PADANY) {
748a9306
LW		 2175 /* is okay */
2176 }
79072805
LW		 2177 else
2178 break;
2179 }
2180 lastop = curop;
2181 }
748a9306
LW		 2182 }
2183 if (curop == repl) {
2184 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2185 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2186 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2187 }
2188 else {
2189 Newz(1101, rcop, 1, LOGOP);
2190 rcop->op_type = OP_SUBSTCONT;
2191 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2192 rcop->op_first = scalar(repl);
2193 rcop->op_flags |= OPf_KIDS;
2194 rcop->op_private = 1;
11343788 2195 rcop->op_other = o;
748a9306
LW		 2196
2197 /* establish postfix order */
2198 rcop->op_next = LINKLIST(repl);
2199 repl->op_next = (OP*)rcop;
2200
2201 pm->op_pmreplroot = scalar((OP*)rcop);
2202 pm->op_pmreplstart = LINKLIST(rcop);
2203 rcop->op_next = 0;
79072805
LW		 2204 }
2205 }
2206
2207 return (OP*)pm;
2208}
2209
2210OP *
8ac85365 2211newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2212{
2213 SVOP *svop;
2214 Newz(1101, svop, 1, SVOP);
2215 svop->op_type = type;
2216 svop->op_ppaddr = ppaddr[type];
2217 svop->op_sv = sv;
2218 svop->op_next = (OP*)svop;
2219 svop->op_flags = flags;
2220 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2221 scalar((OP*)svop);
79072805 2222 if (opargs[type] & OA_TARGET)
ed6116ce 2223 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2224 return CHECKOP(type, svop);
79072805
LW		 2225}
2226
2227OP *
8ac85365 2228newGVOP(I32 type, I32 flags, GV *gv)
79072805 2229{
11343788 2230 dTHR;
79072805
LW		 2231 GVOP *gvop;
2232 Newz(1101, gvop, 1, GVOP);
2233 gvop->op_type = type;
2234 gvop->op_ppaddr = ppaddr[type];
8990e307 2235 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2236 gvop->op_next = (OP*)gvop;
2237 gvop->op_flags = flags;
2238 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2239 scalar((OP*)gvop);
79072805 2240 if (opargs[type] & OA_TARGET)
ed6116ce 2241 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2242 return CHECKOP(type, gvop);
79072805
LW		 2243}
2244
2245OP *
8ac85365 2246newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2247{
2248 PVOP *pvop;
2249 Newz(1101, pvop, 1, PVOP);
2250 pvop->op_type = type;
2251 pvop->op_ppaddr = ppaddr[type];
2252 pvop->op_pv = pv;
2253 pvop->op_next = (OP*)pvop;
2254 pvop->op_flags = flags;
2255 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2256 scalar((OP*)pvop);
79072805 2257 if (opargs[type] & OA_TARGET)
ed6116ce 2258 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2259 return CHECKOP(type, pvop);
79072805
LW		 2260}
2261
79072805 2262void
8ac85365 2263package(OP *o)
79072805 2264{
11343788 2265 dTHR;
93a17b20 2266 SV *sv;
79072805
LW		 2267
2268 save_hptr(&curstash);
2269 save_item(curstname);
11343788 2270 if (o) {
463ee0b2
LW		 2271 STRLEN len;
2272 char *name;
11343788 2273 sv = cSVOPo->op_sv;
463ee0b2 2274 name = SvPV(sv, len);
b1cb66bf 2275 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2276 sv_setpvn(curstname, name, len);
11343788 2277 op_free(o);
93a17b20
LW		 2278 }
2279 else {
2280 sv_setpv(curstname,"<none>");
2281 curstash = Nullhv;
2282 }
79072805 2283 copline = NOLINE;
8990e307 2284 expect = XSTATE;
79072805
LW		 2285}
2286
85e6fe83 2287void
8ac85365 2288utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2289{
a0d0e21e
LW		 2290 OP *pack;
2291 OP *meth;
2292 OP *rqop;
2293 OP *imop;
b1cb66bf 2294 OP *veop;
85e6fe83 2295
a0d0e21e
LW		 2296 if (id->op_type != OP_CONST)
2297 croak("Module name must be constant");
85e6fe83 2298
b1cb66bf 2299 veop = Nullop;
2300
2301 if(version != Nullop) {
2302 SV *vesv = ((SVOP*)version)->op_sv;
2303
2304 if (arg == Nullop && !SvNIOK(vesv)) {
2305 arg = version;
2306 }
2307 else {
2308 OP *pack;
2309 OP *meth;
2310
2311 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2312 croak("Version number must be constant number");
2313
2314 /* Make copy of id so we don't free it twice */
2315 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2316
2317 /* Fake up a method call to VERSION */
2318 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2319 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2320 append_elem(OP_LIST,
2321 prepend_elem(OP_LIST, pack, list(version)),
2322 newUNOP(OP_METHOD, 0, meth)));
2323 }
2324 }
aeea060c 2325
a0d0e21e 2326 /* Fake up an import/unimport */
4633a7c4
LW		 2327 if (arg && arg->op_type == OP_STUB)
2328 imop = arg; /* no import on explicit () */
b1cb66bf 2329 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2330 imop = Nullop; /* use 5.0; */
2331 }
4633a7c4
LW		 2332 else {
2333 /* Make copy of id so we don't free it twice */
2334 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2335 meth = newSVOP(OP_CONST, 0,
2336 aver
2337 ? newSVpv("import", 6)
2338 : newSVpv("unimport", 8)
2339 );
2340 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2341 append_elem(OP_LIST,
2342 prepend_elem(OP_LIST, pack, list(arg)),
2343 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2344 }
2345
2346 /* Fake up a require */
2347 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2348
2349 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2350 newSUB(floor,
a0d0e21e 2351 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2352 Nullop,
a0d0e21e 2353 append_elem(OP_LINESEQ,
b1cb66bf 2354 append_elem(OP_LINESEQ,
2355 newSTATEOP(0, Nullch, rqop),
2356 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2357 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2358
85e6fe83
LW		 2359 copline = NOLINE;
2360 expect = XSTATE;
2361}
2362
79072805 2363OP *
8ac85365 2364newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2365{
2366 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2367 list(force_list(subscript)),
2368 list(force_list(listval)) );
79072805
LW		 2369}
2370
2371static I32
8ac85365 2372list_assignment(register OP *o)
79072805 2373{
11343788 2374 if (!o)
79072805
LW		 2375 return TRUE;
2376
11343788
MB		 2377 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2378 o = cUNOPo->op_first;
79072805 2379
11343788
MB		 2380 if (o->op_type == OP_COND_EXPR) {
2381 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2382 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2383
2384 if (t && f)
2385 return TRUE;
2386 if (t || f)
2387 yyerror("Assignment to both a list and a scalar");
2388 return FALSE;
2389 }
2390
11343788
MB		 2391 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2392 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2393 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2394 return TRUE;
2395
11343788 2396 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2397 return TRUE;
2398
11343788 2399 if (o->op_type == OP_RV2SV)
79072805
LW		 2400 return FALSE;
2401
2402 return FALSE;
2403}
2404
2405OP *
8ac85365 2406newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2407{
11343788 2408 OP *o;
79072805 2409
a0d0e21e
LW		 2410 if (optype) {
2411 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2412 return newLOGOP(optype, 0,
2413 mod(scalar(left), optype),
2414 newUNOP(OP_SASSIGN, 0, scalar(right)));
2415 }
2416 else {
2417 return newBINOP(optype, OPf_STACKED,
2418 mod(scalar(left), optype), scalar(right));
2419 }
2420 }
2421
79072805 2422 if (list_assignment(left)) {
6ee623d5 2423 dTHR;
463ee0b2 2424 modcount = 0;
748a9306 2425 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2426 left = mod(left, OP_AASSIGN);
748a9306
LW		 2427 if (eval_start)
2428 eval_start = 0;
2429 else {
a0d0e21e
LW		 2430 op_free(left);
2431 op_free(right);
2432 return Nullop;
2433 }
11343788 2434 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2435 list(force_list(right)),
2436 list(force_list(left)) );
11343788 2437 o->op_private = 0 | (flags >> 8);
a0d0e21e 2438 if (!(left->op_private & OPpLVAL_INTRO)) {
748a9306 2439 static int generation = 100;
79072805 2440 OP *curop;
11343788 2441 OP *lastop = o;
79072805 2442 generation++;
11343788 2443 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2444 if (opargs[curop->op_type] & OA_DANGEROUS) {
2445 if (curop->op_type == OP_GV) {
2446 GV *gv = ((GVOP*)curop)->op_gv;
2447 if (gv == defgv || SvCUR(gv) == generation)
2448 break;
2449 SvCUR(gv) = generation;
2450 }
748a9306
LW		 2451 else if (curop->op_type == OP_PADSV ||
2452 curop->op_type == OP_PADAV ||
2453 curop->op_type == OP_PADHV ||
2454 curop->op_type == OP_PADANY) {
2455 SV **svp = AvARRAY(comppad_name);
8e07c86e 2456 SV *sv = svp[curop->op_targ];
748a9306
LW		 2457 if (SvCUR(sv) == generation)
2458 break;
2459 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2460 }
79072805
LW		 2461 else if (curop->op_type == OP_RV2CV)
2462 break;
2463 else if (curop->op_type == OP_RV2SV ||
2464 curop->op_type == OP_RV2AV ||
2465 curop->op_type == OP_RV2HV ||
2466 curop->op_type == OP_RV2GV) {
2467 if (lastop->op_type != OP_GV) /* funny deref? */
2468 break;
2469 }
2470 else
2471 break;
2472 }
2473 lastop = curop;
2474 }
11343788
MB		 2475 if (curop != o)
2476 o->op_private = OPpASSIGN_COMMON;
79072805 2477 }
c07a80fd 2478 if (right && right->op_type == OP_SPLIT) {
2479 OP* tmpop;
2480 if ((tmpop = ((LISTOP*)right)->op_first) &&
2481 tmpop->op_type == OP_PUSHRE)
2482 {
2483 PMOP *pm = (PMOP*)tmpop;
2484 if (left->op_type == OP_RV2AV &&
2485 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2486 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2487 {
2488 tmpop = ((UNOP*)left)->op_first;
2489 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2490 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2491 pm->op_pmflags |= PMf_ONCE;
11343788 2492 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2493 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2494 tmpop->op_sibling = Nullop; /* don't free split */
2495 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2496 op_free(o); /* blow off assign */
54310121 2497 right->op_flags &= ~OPf_WANT;
a5f75d66 2498 /* "I don't know and I don't care." */
c07a80fd 2499 return right;
2500 }
2501 }
2502 else {
2503 if (modcount < 10000 &&
2504 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2505 {
2506 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2507 if (SvIVX(sv) == 0)
2508 sv_setiv(sv, modcount+1);
2509 }
2510 }
2511 }
2512 }
11343788 2513 return o;
79072805
LW		 2514 }
2515 if (!right)
2516 right = newOP(OP_UNDEF, 0);
2517 if (right->op_type == OP_READLINE) {
2518 right->op_flags |= OPf_STACKED;
463ee0b2 2519 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2520 }
a0d0e21e 2521 else {
748a9306 2522 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2523 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2524 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2525 if (eval_start)
2526 eval_start = 0;
2527 else {
11343788 2528 op_free(o);
a0d0e21e
LW		 2529 return Nullop;
2530 }
2531 }
11343788 2532 return o;
79072805
LW		 2533}
2534
2535OP *
8ac85365 2536newSTATEOP(I32 flags, char *label, OP *o)
79072805 2537{
11343788 2538 dTHR;
bbce6d69 2539 U32 seq = intro_my();
79072805
LW		 2540 register COP *cop;
2541
2542 Newz(1101, cop, 1, COP);
84902520 2543 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2544 cop->op_type = OP_DBSTATE;
2545 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2546 }
2547 else {
2548 cop->op_type = OP_NEXTSTATE;
2549 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2550 }
79072805 2551 cop->op_flags = flags;
c07a80fd 2552 cop->op_private = 0 | (flags >> 8);
ff0cee69 2553#ifdef NATIVE_HINTS
2554 cop->op_private |= NATIVE_HINTS;
2555#endif
79072805
LW		 2556 cop->op_next = (OP*)cop;
2557
463ee0b2
LW		 2558 if (label) {
2559 cop->cop_label = label;
85e6fe83 2560 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2561 }
bbce6d69 2562 cop->cop_seq = seq;
a0d0e21e 2563 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2564
2565 if (copline == NOLINE)
2566 cop->cop_line = curcop->cop_line;
2567 else {
2568 cop->cop_line = copline;
2569 copline = NOLINE;
2570 }
44a8e56a 2571 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2572 cop->cop_stash = curstash;
2573
84902520 2574 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2575 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2576 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2577 (void)SvIOK_on(*svp);
a5f75d66 2578 SvIVX(*svp) = 1;
93a17b20
LW		 2579 SvSTASH(*svp) = (HV*)cop;
2580 }
2581 }
2582
11343788 2583 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2584}
2585
bbce6d69 2586/* "Introduce" my variables to visible status. */
2587U32
8ac85365 2588intro_my(void)
bbce6d69 2589{
2590 SV **svp;
2591 SV *sv;
2592 I32 i;
2593
2594 if (! min_intro_pending)
2595 return cop_seqmax;
2596
2597 svp = AvARRAY(comppad_name);
2598 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2599 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2600 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2601 SvNVX(sv) = (double)cop_seqmax;
2602 }
2603 }
2604 min_intro_pending = 0;
2605 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2606 return cop_seqmax++;
2607}
2608
79072805 2609OP *
8ac85365 2610newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2611{
883ffac3
CS		 2612 return new_logop(type, flags, &first, &other);
2613}
2614
2615static OP *
2616new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2617{
11343788 2618 dTHR;
79072805 2619 LOGOP *logop;
11343788 2620 OP *o;
883ffac3
CS		 2621 OP *first = *firstp;
2622 OP *other = *otherp;
79072805 2623
a0d0e21e
LW		 2624 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2625 return newBINOP(type, flags, scalar(first), scalar(other));
2626
8990e307 2627 scalarboolean(first);
79072805
LW		 2628 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2629 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2630 if (type == OP_AND || type == OP_OR) {
2631 if (type == OP_AND)
2632 type = OP_OR;
2633 else
2634 type = OP_AND;
11343788 2635 o = first;
883ffac3 2636 first = *firstp = cUNOPo->op_first;
11343788
MB		 2637 if (o->op_next)
2638 first->op_next = o->op_next;
2639 cUNOPo->op_first = Nullop;
2640 op_free(o);
79072805
LW		 2641 }
2642 }
2643 if (first->op_type == OP_CONST) {
93a17b20 2644 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2645 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2646 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2647 op_free(first);
883ffac3 2648 *firstp = Nullop;
79072805
LW		 2649 return other;
2650 }
2651 else {
2652 op_free(other);
883ffac3 2653 *otherp = Nullop;
79072805
LW		 2654 return first;
2655 }
2656 }
2657 else if (first->op_type == OP_WANTARRAY) {
2658 if (type == OP_AND)
2659 list(other);
2660 else
2661 scalar(other);
2662 }
a6006777 2663 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2664 OP *k1 = ((UNOP*)first)->op_first;
2665 OP *k2 = k1->op_sibling;
2666 OPCODE warnop = 0;
2667 switch (first->op_type)
2668 {
2669 case OP_NULL:
2670 if (k2 && k2->op_type == OP_READLINE
2671 && (k2->op_flags & OPf_STACKED)
2672 && (k1->op_type == OP_RV2SV || k1->op_type == OP_PADSV))
2673 warnop = k2->op_type;
2674 break;
2675
2676 case OP_SASSIGN:
68dc0745 2677 if (k1->op_type == OP_READDIR
2678 || k1->op_type == OP_GLOB
2679 || k1->op_type == OP_EACH)
a6006777 2680 warnop = k1->op_type;
2681 break;
2682 }
8ebc5c01 2683 if (warnop) {
2684 line_t oldline = curcop->cop_line;
2685 curcop->cop_line = copline;
68dc0745 2686 warn("Value of %s%s can be \"0\"; test with defined()",
2687 op_desc[warnop],
2688 ((warnop == OP_READLINE || warnop == OP_GLOB)
2689 ? " construct" : "() operator"));
2690 curcop->cop_line = oldline;
8ebc5c01 2691 }
a6006777 2692 }
79072805
LW		 2693
2694 if (!other)
2695 return first;
2696
a0d0e21e
LW		 2697 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2698 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2699
79072805
LW		 2700 Newz(1101, logop, 1, LOGOP);
2701
2702 logop->op_type = type;
2703 logop->op_ppaddr = ppaddr[type];
2704 logop->op_first = first;
2705 logop->op_flags = flags | OPf_KIDS;
2706 logop->op_other = LINKLIST(other);
c07a80fd 2707 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2708
2709 /* establish postfix order */
2710 logop->op_next = LINKLIST(first);
2711 first->op_next = (OP*)logop;
2712 first->op_sibling = other;
2713
11343788
MB		 2714 o = newUNOP(OP_NULL, 0, (OP*)logop);
2715 other->op_next = o;
79072805 2716
11343788 2717 return o;
79072805
LW		 2718}
2719
2720OP *
8ac85365 2721newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2722{
11343788 2723 dTHR;
79072805 2724 CONDOP *condop;
11343788 2725 OP *o;
79072805 2726
b1cb66bf 2727 if (!falseop)
2728 return newLOGOP(OP_AND, 0, first, trueop);
2729 if (!trueop)
2730 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2731
8990e307 2732 scalarboolean(first);
79072805
LW		 2733 if (first->op_type == OP_CONST) {
2734 if (SvTRUE(((SVOP*)first)->op_sv)) {
2735 op_free(first);
b1cb66bf 2736 op_free(falseop);
2737 return trueop;
79072805
LW		 2738 }
2739 else {
2740 op_free(first);
b1cb66bf 2741 op_free(trueop);
2742 return falseop;
79072805
LW		 2743 }
2744 }
2745 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2746 list(trueop);
2747 scalar(falseop);
79072805
LW		 2748 }
2749 Newz(1101, condop, 1, CONDOP);
2750
2751 condop->op_type = OP_COND_EXPR;
2752 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2753 condop->op_first = first;
2754 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2755 condop->op_true = LINKLIST(trueop);
2756 condop->op_false = LINKLIST(falseop);
c07a80fd 2757 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2758
2759 /* establish postfix order */
2760 condop->op_next = LINKLIST(first);
2761 first->op_next = (OP*)condop;
2762
b1cb66bf 2763 first->op_sibling = trueop;
2764 trueop->op_sibling = falseop;
11343788 2765 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2766
5dc0d613
MB		 2767 trueop->op_next = o;
2768 falseop->op_next = o;
79072805 2769
11343788 2770 return o;
79072805
LW		 2771}
2772
2773OP *
8ac85365 2774newRANGE(I32 flags, OP *left, OP *right)
79072805 2775{
b35b2403 2776 dTHR;
79072805
LW		 2777 CONDOP *condop;
2778 OP *flip;
2779 OP *flop;
11343788 2780 OP *o;
79072805
LW		 2781
2782 Newz(1101, condop, 1, CONDOP);
2783
2784 condop->op_type = OP_RANGE;
2785 condop->op_ppaddr = ppaddr[OP_RANGE];
2786 condop->op_first = left;
2787 condop->op_flags = OPf_KIDS;
2788 condop->op_true = LINKLIST(left);
2789 condop->op_false = LINKLIST(right);
c07a80fd 2790 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2791
2792 left->op_sibling = right;
2793
2794 condop->op_next = (OP*)condop;
2795 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2796 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2797 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2798 linklist(flop);
2799
2800 left->op_next = flip;
2801 right->op_next = flop;
2802
ed6116ce 2803 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2804 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2805 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2806 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2807
2808 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2809 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2810
11343788 2811 flip->op_next = o;
79072805 2812 if (!flip->op_private || !flop->op_private)
11343788 2813 linklist(o); /* blow off optimizer unless constant */
79072805 2814
11343788 2815 return o;
79072805
LW		 2816}
2817
2818OP *
8ac85365 2819newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2820{
11343788 2821 dTHR;
463ee0b2 2822 OP* listop;
11343788 2823 OP* o;
463ee0b2 2824 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2825 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2826
463ee0b2
LW		 2827 if (expr) {
2828 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2829 return block; /* do {} while 0 does once */
fb73857a 2830 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2831 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2832 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2833 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
774d564b 2834 }
463ee0b2 2835 }
93a17b20 2836
8990e307 2837 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 2838 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 2839
883ffac3
CS		 2840 if (listop)
2841 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2842
11343788
MB		 2843 if (once && o != listop)
2844 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2845
11343788
MB		 2846 if (o == listop)
2847 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2848
11343788
MB		 2849 o->op_flags |= flags;
2850 o = scope(o);
2851 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2852 return o;
79072805
LW		 2853}
2854
2855OP *
8ac85365 2856newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2857{
11343788 2858 dTHR;
79072805
LW		 2859 OP *redo;
2860 OP *next = 0;
2861 OP *listop;
11343788 2862 OP *o;
79072805
LW		 2863 OP *condop;
2864
fb73857a 2865 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2866 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2867 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2868 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
748a9306 2869 }
79072805
LW		 2870
2871 if (!block)
2872 block = newOP(OP_NULL, 0);
2873
2874 if (cont)
2875 next = LINKLIST(cont);
fb73857a 2876 if (expr) {
79072805 2877 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2878 if ((line_t)whileline != NOLINE) {
2879 copline = whileline;
2880 cont = append_elem(OP_LINESEQ, cont,
2881 newSTATEOP(0, Nullch, Nullop));
2882 }
2883 }
79072805 2884
463ee0b2 2885 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2886 redo = LINKLIST(listop);
2887
2888 if (expr) {
883ffac3
CS		 2889 copline = whileline;
2890 scalar(listop);
2891 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 2892 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2893 op_free(expr); /* oops, it's a while (0) */
463ee0b2 2894 op_free((OP*)loop);
883ffac3 2895 return Nullop; /* listop already freed by new_logop */
463ee0b2 2896 }
883ffac3
CS		 2897 if (listop)
2898 ((LISTOP*)listop)->op_last->op_next = condop =
2899 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2900 if (!next)
2901 next = condop;
2902 }
2903 else
11343788 2904 o = listop;
79072805
LW		 2905
2906 if (!loop) {
2907 Newz(1101,loop,1,LOOP);
2908 loop->op_type = OP_ENTERLOOP;
2909 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2910 loop->op_private = 0;
2911 loop->op_next = (OP*)loop;
2912 }
2913
11343788 2914 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 2915
2916 loop->op_redoop = redo;
11343788 2917 loop->op_lastop = o;
79072805
LW		 2918
2919 if (next)
2920 loop->op_nextop = next;
2921 else
11343788 2922 loop->op_nextop = o;
79072805 2923
11343788
MB		 2924 o->op_flags |= flags;
2925 o->op_private |= (flags >> 8);
2926 return o;
79072805
LW		 2927}
2928
2929OP *
8990e307 2930newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 2931{
2932 LOOP *loop;
fb73857a 2933 OP *wop;
85e6fe83 2934 int padoff = 0;
4633a7c4 2935 I32 iterflags = 0;
79072805 2936
79072805 2937 if (sv) {
85e6fe83 2938 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 2939 sv->op_type = OP_RV2GV;
2940 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 2941 }
85e6fe83
LW		 2942 else if (sv->op_type == OP_PADSV) { /* private variable */
2943 padoff = sv->op_targ;
2944 op_free(sv);
2945 sv = Nullop;
2946 }
54b9620d
MB		 2947 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
2948 padoff = sv->op_targ;
2949 iterflags |= OPf_SPECIAL;
2950 op_free(sv);
2951 sv = Nullop;
2952 }
79072805 2953 else
c07a80fd 2954 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 2955 }
2956 else {
54b9620d
MB		 2957#ifdef USE_THREADS
2958 padoff = find_threadsv("_");
2959 iterflags |= OPf_SPECIAL;
2960#else
79072805 2961 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 2962#endif
79072805 2963 }
5f05dabc 2964 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
4633a7c4
LW		 2965 expr = scalar(ref(expr, OP_ITER));
2966 iterflags |= OPf_STACKED;
2967 }
2968 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
a0d0e21e
LW		 2969 append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART),
2970 scalar(sv))));
85e6fe83
LW		 2971 assert(!loop->op_next);
2972 Renew(loop, 1, LOOP);
2973 loop->op_targ = padoff;
fb73857a 2974 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
2975 copline = forline;
2976 return newSTATEOP(0, label, wop);
79072805
LW		 2977}
2978
8990e307 2979OP*
8ac85365 2980newLOOPEX(I32 type, OP *label)
8990e307 2981{
11343788
MB		 2982 dTHR;
2983 OP *o;
8990e307 2984 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 2985 /* "last()" means "last" */
2986 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
2987 o = newOP(type, OPf_SPECIAL);
2988 else {
2989 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2990 ? SvPVx(((SVOP*)label)->op_sv, na)
2991 : ""));
2992 }
8990e307
LW		 2993 op_free(label);
2994 }
2995 else {
a0d0e21e
LW		 2996 if (label->op_type == OP_ENTERSUB)
2997 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 2998 o = newUNOP(type, OPf_STACKED, label);
8990e307 2999 }
85e6fe83 3000 hints |= HINT_BLOCK_SCOPE;
11343788 3001 return o;
8990e307
LW		 3002}
3003
79072805 3004void
8ac85365 3005cv_undef(CV *cv)
79072805 3006{
11343788
MB		 3007 dTHR;
3008#ifdef USE_THREADS
e858de61
MB		 3009 if (CvMUTEXP(cv)) {
3010 MUTEX_DESTROY(CvMUTEXP(cv));
3011 Safefree(CvMUTEXP(cv));
3012 CvMUTEXP(cv) = 0;
3013 }
11343788
MB		 3014#endif /* USE_THREADS */
3015
a0d0e21e 3016 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3017#ifdef USE_THREADS
3018 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3019 croak("Can't undef active subroutine");
3020#else
a0d0e21e
LW		 3021 if (CvDEPTH(cv))
3022 croak("Can't undef active subroutine");
11343788 3023#endif /* USE_THREADS */
8990e307 3024 ENTER;
a0d0e21e
LW		 3025
3026 SAVESPTR(curpad);
3027 curpad = 0;
3028
a5f75d66 3029 if (!CvCLONED(cv))
748a9306 3030 op_free(CvROOT(cv));
79072805 3031 CvROOT(cv) = Nullop;
8990e307 3032 LEAVE;
79072805 3033 }
1d5db326 3034 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3035 CvFLAGS(cv) = 0;
8e07c86e
AD		 3036 SvREFCNT_dec(CvGV(cv));
3037 CvGV(cv) = Nullgv;
3038 SvREFCNT_dec(CvOUTSIDE(cv));
3039 CvOUTSIDE(cv) = Nullcv;
3040 if (CvPADLIST(cv)) {
8ebc5c01 3041 /* may be during global destruction */
3042 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3043 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3044 while (i >= 0) {
3045 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3046 SV* sv = svp ? *svp : Nullsv;
3047 if (!sv)
3048 continue;
3049 if (sv == (SV*)comppad_name)
3050 comppad_name = Nullav;
3051 else if (sv == (SV*)comppad) {
3052 comppad = Nullav;
3053 curpad = Null(SV**);
3054 }
3055 SvREFCNT_dec(sv);
8ebc5c01 3056 }
3057 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3058 }
8e07c86e
AD		 3059 CvPADLIST(cv) = Nullav;
3060 }
79072805
LW		 3061}
3062
5f05dabc 3063#ifdef DEBUG_CLOSURES
3064static void
3065cv_dump(cv)
3066CV* cv;
3067{
3068 CV *outside = CvOUTSIDE(cv);
3069 AV* padlist = CvPADLIST(cv);
4fdae800 3070 AV* pad_name;
3071 AV* pad;
3072 SV** pname;
3073 SV** ppad;
5f05dabc 3074 I32 ix;
3075
fb73857a 3076 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3077 cv,
3078 (CvANON(cv) ? "ANON"
3079 : (cv == main_cv) ? "MAIN"
07055b4c 3080 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3081 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3082 outside,
3083 (!outside ? "null"
3084 : CvANON(outside) ? "ANON"
3085 : (outside == main_cv) ? "MAIN"
07055b4c 3086 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3087 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3088
4fdae800 3089 if (!padlist)
3090 return;
3091
3092 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3093 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3094 pname = AvARRAY(pad_name);
3095 ppad = AvARRAY(pad);
3096
93965878 3097 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3098 if (SvPOK(pname[ix]))
fb73857a 3099 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3100 ix, ppad[ix],
3101 SvFAKE(pname[ix]) ? "FAKE " : "",
3102 SvPVX(pname[ix]),
ab50184a
CS		 3103 (long)I_32(SvNVX(pname[ix])),
3104 (long)SvIVX(pname[ix]));
5f05dabc 3105 }
3106}
3107#endif /* DEBUG_CLOSURES */
3108
3109static CV *
8ac85365 3110cv_clone2(CV *proto, CV *outside)
748a9306 3111{
11343788 3112 dTHR;
748a9306
LW		 3113 AV* av;
3114 I32 ix;
3115 AV* protopadlist = CvPADLIST(proto);
3116 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3117 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3118 SV** pname = AvARRAY(protopad_name);
3119 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3120 I32 fname = AvFILLp(protopad_name);
3121 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3122 AV* comppadlist;
3123 CV* cv;
3124
07055b4c
CS		 3125 assert(!CvUNIQUE(proto));
3126
748a9306
LW		 3127 ENTER;
3128 SAVESPTR(curpad);
3129 SAVESPTR(comppad);
46fc3d4c 3130 SAVESPTR(comppad_name);
748a9306
LW		 3131 SAVESPTR(compcv);
3132
3133 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3134 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3135 CvCLONED_on(cv);
5f05dabc 3136 if (CvANON(proto))
3137 CvANON_on(cv);
748a9306 3138
11343788 3139#ifdef USE_THREADS
12ca11f6 3140 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3141 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3142 CvOWNER(cv) = 0;
3143#endif /* USE_THREADS */
748a9306 3144 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3145 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3146 CvSTASH(cv) = CvSTASH(proto);
3147 CvROOT(cv) = CvROOT(proto);
3148 CvSTART(cv) = CvSTART(proto);
5f05dabc 3149 if (outside)
3150 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3151
68dc0745 3152 if (SvPOK(proto))
3153 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3154
46fc3d4c 3155 comppad_name = newAV();
3156 for (ix = fname; ix >= 0; ix--)
3157 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3158
3159 comppad = newAV();
3160
3161 comppadlist = newAV();
3162 AvREAL_off(comppadlist);
46fc3d4c 3163 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3164 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3165 CvPADLIST(cv) = comppadlist;
93965878 3166 av_fill(comppad, AvFILLp(protopad));
748a9306
LW		 3167 curpad = AvARRAY(comppad);
3168
3169 av = newAV(); /* will be @_ */
3170 av_extend(av, 0);
3171 av_store(comppad, 0, (SV*)av);
3172 AvFLAGS(av) = AVf_REIFY;
3173
9607fc9c 3174 for (ix = fpad; ix > 0; ix--) {
3175 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3176 if (namesv && namesv != &sv_undef) {
3177 char *name = SvPVX(namesv); /* XXX */
3178 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3179 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3180 CvOUTSIDE(cv), cxstack_ix);
3181 if (!off)
3182 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3183 else if (off != ix)
748a9306
LW		 3184 croak("panic: cv_clone: %s", name);
3185 }
3186 else { /* our own lexical */
aa689395 3187 SV* sv;
5f05dabc 3188 if (*name == '&') {
3189 /* anon code -- we'll come back for it */
3190 sv = SvREFCNT_inc(ppad[ix]);
3191 }
3192 else if (*name == '@')
3193 sv = (SV*)newAV();
748a9306 3194 else if (*name == '%')
5f05dabc 3195 sv = (SV*)newHV();
748a9306 3196 else
5f05dabc 3197 sv = NEWSV(0,0);
3198 if (!SvPADBUSY(sv))
3199 SvPADMY_on(sv);
3200 curpad[ix] = sv;
748a9306
LW		 3201 }
3202 }
3203 else {
aa689395 3204 SV* sv = NEWSV(0,0);
748a9306 3205 SvPADTMP_on(sv);
5f05dabc 3206 curpad[ix] = sv;
748a9306
LW		 3207 }
3208 }
3209
5f05dabc 3210 /* Now that vars are all in place, clone nested closures. */
3211
9607fc9c 3212 for (ix = fpad; ix > 0; ix--) {
3213 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3214 if (namesv
3215 && namesv != &sv_undef
3216 && !(SvFLAGS(namesv) & SVf_FAKE)
3217 && *SvPVX(namesv) == '&'
5f05dabc 3218 && CvCLONE(ppad[ix]))
3219 {
3220 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3221 SvREFCNT_dec(ppad[ix]);
3222 CvCLONE_on(kid);
3223 SvPADMY_on(kid);
3224 curpad[ix] = (SV*)kid;
748a9306
LW		 3225 }
3226 }
3227
5f05dabc 3228#ifdef DEBUG_CLOSURES
ab50184a
CS		 3229 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3230 cv_dump(outside);
3231 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3232 cv_dump(proto);
ab50184a 3233 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3234 cv_dump(cv);
3235#endif
3236
748a9306
LW		 3237 LEAVE;
3238 return cv;
3239}
3240
3241CV *
8ac85365 3242cv_clone(CV *proto)
5f05dabc 3243{
3244 return cv_clone2(proto, CvOUTSIDE(proto));
3245}
3246
3fe9a6f1 3247void
8ac85365 3248cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3249{
3250 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3251 SV* msg = sv_newmortal();
3fe9a6f1 3252 SV* name = Nullsv;
3253
3254 if (gv)
46fc3d4c 3255 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3256 sv_setpv(msg, "Prototype mismatch:");
3257 if (name)
fc36a67e 3258 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3259 if (SvPOK(cv))
46fc3d4c 3260 sv_catpvf(msg, " (%s)", SvPVX(cv));
3261 sv_catpv(msg, " vs ");
3262 if (p)
3263 sv_catpvf(msg, "(%s)", p);
3264 else
3265 sv_catpv(msg, "none");
fc36a67e 3266 warn("%_", msg);
3fe9a6f1 3267 }
3268}
3269
760ac839 3270SV *
8ac85365 3271cv_const_sv(CV *cv)
760ac839
LW		 3272{
3273 OP *o;
54310121 3274 SV *sv;
aeea060c 3275
54310121 3276 if (!cv || !SvPOK(cv) || SvCUR(cv))
3277 return Nullsv;
760ac839 3278
54310121 3279 sv = Nullsv;
3280 for (o = CvSTART(cv); o; o = o->op_next) {
3281 OPCODE type = o->op_type;
3282
3283 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3284 continue;
3285 if (type == OP_LEAVESUB || type == OP_RETURN)
3286 break;
3287 if (sv)
3288 return Nullsv;
3289 if (type == OP_CONST)
5dc0d613 3290 sv = cSVOPo->op_sv;
54310121 3291 else if (type == OP_PADSV) {
e858de61
MB		 3292 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3293 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3294 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3295 return Nullsv;
760ac839 3296 }
54310121 3297 else
3298 return Nullsv;
760ac839 3299 }
5aabfad6 3300 if (sv)
3301 SvREADONLY_on(sv);
760ac839
LW		 3302 return sv;
3303}
3304
748a9306 3305CV *
8ac85365 3306newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3307{
11343788 3308 dTHR;
5dc0d613 3309 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
44a8e56a 3310 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
3fe9a6f1 3311 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
79072805 3312 register CV *cv;
a0d0e21e 3313 I32 ix;
79072805 3314
11343788 3315 if (o)
5dc0d613 3316 SAVEFREEOP(o);
3fe9a6f1 3317 if (proto)
3318 SAVEFREEOP(proto);
3319
68dc0745 3320 if (!name || GvCVGEN(gv))
3321 cv = Nullcv;
3322 else if (cv = GvCV(gv)) {
3fe9a6f1 3323 cv_ckproto(cv, gv, ps);
68dc0745 3324 /* already defined (or promised)? */
3325 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3326 SV* const_sv;
aa689395 3327 if (!block) {
3328 /* just a "sub foo;" when &foo is already defined */
3329 SAVEFREESV(compcv);
3330 goto done;
3331 }
7bac28a0 3332 /* ahem, death to those who redefine active sort subs */
e336de0d 3333 if (curstackinfo->si_type == SI_SORT && sortcop == CvSTART(cv))
7bac28a0 3334 croak("Can't redefine active sort subroutine %s", name);
68dc0745 3335 const_sv = cv_const_sv(cv);
2f34f9d4
IZ		 3336 if (const_sv || dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
3337 && HvNAME(GvSTASH(CvGV(cv)))
3338 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3339 "autouse"))) {
79072805 3340 line_t oldline = curcop->cop_line;
79072805 3341 curcop->cop_line = copline;
760ac839 3342 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3343 : "Subroutine %s redefined", name);
79072805
LW		 3344 curcop->cop_line = oldline;
3345 }
8990e307 3346 SvREFCNT_dec(cv);
68dc0745 3347 cv = Nullcv;
79072805
LW		 3348 }
3349 }
a0d0e21e 3350 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3351 cv_undef(cv);
44a8e56a 3352 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3353 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3354 CvOUTSIDE(compcv) = 0;
748a9306 3355 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3356 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3357 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3358 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3359 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3360 }
3361 else {
748a9306 3362 cv = compcv;
44a8e56a 3363 if (name) {
3364 GvCV(gv) = cv;
3365 GvCVGEN(gv) = 0;
3366 sub_generation++;
3367 }
a0d0e21e 3368 }
44a8e56a 3369 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3370 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3371 CvSTASH(cv) = curstash;
11343788
MB		 3372#ifdef USE_THREADS
3373 CvOWNER(cv) = 0;
12ca11f6 3374 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3375 MUTEX_INIT(CvMUTEXP(cv));
11343788 3376#endif /* USE_THREADS */
8990e307 3377
3fe9a6f1 3378 if (ps)
3379 sv_setpv((SV*)cv, ps);
4633a7c4 3380
c07a80fd 3381 if (error_count) {
3382 op_free(block);
3383 block = Nullop;
68dc0745 3384 if (name) {
3385 char *s = strrchr(name, ':');
3386 s = s ? s+1 : name;
6d4c2119
CS		 3387 if (strEQ(s, "BEGIN")) {
3388 char *not_safe =
3389 "BEGIN not safe after errors--compilation aborted";
3390 if (in_eval & 4)
3391 croak(not_safe);
3392 else {
3393 /* force display of errors found but not reported */
38a03e6e
MB		 3394 sv_catpv(ERRSV, not_safe);
3395 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3396 }
3397 }
68dc0745 3398 }
c07a80fd 3399 }
a0d0e21e 3400 if (!block) {
a0d0e21e
LW		 3401 copline = NOLINE;
3402 LEAVE_SCOPE(floor);
3403 return cv;
3404 }
3405
93965878
NIS		 3406 if (AvFILLp(comppad_name) < AvFILLp(comppad))
3407 av_store(comppad_name, AvFILLp(comppad), Nullsv);
a0d0e21e 3408
54310121 3409 if (CvCLONE(cv)) {
3410 SV **namep = AvARRAY(comppad_name);
93965878 3411 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3412 SV *namesv;
3413
3414 if (SvIMMORTAL(curpad[ix]))
3415 continue;
3416 /*
3417 * The only things that a clonable function needs in its
3418 * pad are references to outer lexicals and anonymous subs.
3419 * The rest are created anew during cloning.
3420 */
3421 if (!((namesv = namep[ix]) != Nullsv &&
3422 namesv != &sv_undef &&
3423 (SvFAKE(namesv) ||
3424 *SvPVX(namesv) == '&')))
3425 {
3426 SvREFCNT_dec(curpad[ix]);
3427 curpad[ix] = Nullsv;
3428 }
3429 }
a0d0e21e 3430 }
54310121 3431 else {
3432 AV *av = newAV(); /* Will be @_ */
3433 av_extend(av, 0);
3434 av_store(comppad, 0, (SV*)av);
3435 AvFLAGS(av) = AVf_REIFY;
79072805 3436
93965878 3437 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3438 if (SvIMMORTAL(curpad[ix]))
3439 continue;
3440 if (!SvPADMY(curpad[ix]))
3441 SvPADTMP_on(curpad[ix]);
3442 }
3443 }
79072805 3444
a0d0e21e 3445 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3446 CvSTART(cv) = LINKLIST(CvROOT(cv));
3447 CvROOT(cv)->op_next = 0;
3448 peep(CvSTART(cv));
93a17b20 3449
44a8e56a 3450 if (name) {
3451 char *s;
3452
84902520 3453 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3454 SV *sv = NEWSV(0,0);
44a8e56a 3455 SV *tmpstr = sv_newmortal();
549bb64a 3456 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3457 CV *cv;
3458 HV *hv;
3459
51790459
MB		 3460 sv_setpvf(sv, "%_:%ld-%ld",
3461 GvSV(curcop->cop_filegv),
3462 (long)subline, (long)curcop->cop_line);
44a8e56a 3463 gv_efullname3(tmpstr, gv, Nullch);
3464 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3465 hv = GvHVn(db_postponed);
9607fc9c 3466 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3467 && (cv = GvCV(db_postponed))) {
44a8e56a 3468 dSP;
924508f0 3469 PUSHMARK(SP);
44a8e56a 3470 XPUSHs(tmpstr);
3471 PUTBACK;
3472 perl_call_sv((SV*)cv, G_DISCARD);
3473 }
3474 }
79072805 3475
44a8e56a 3476 if ((s = strrchr(name,':')))
28757baa 3477 s++;
3478 else
3479 s = name;
68dc0745 3480 if (strEQ(s, "BEGIN")) {
2ae324a7 3481 I32 oldscope = scopestack_ix;
28757baa 3482 ENTER;
3483 SAVESPTR(compiling.cop_filegv);
3484 SAVEI16(compiling.cop_line);
28757baa 3485 save_svref(&rs);
3486 sv_setsv(rs, nrs);
3487
3488 if (!beginav)
3489 beginav = newAV();
3490 DEBUG_x( dump_sub(gv) );
3491 av_push(beginav, (SV *)cv);
3492 GvCV(gv) = 0;
68dc0745 3493 call_list(oldscope, beginav);
a6006777 3494
28757baa 3495 curcop = &compiling;
3496 LEAVE;
3497 }
3498 else if (strEQ(s, "END") && !error_count) {
3499 if (!endav)
3500 endav = newAV();
3501 av_unshift(endav, 1);
3502 av_store(endav, 0, (SV *)cv);
3503 GvCV(gv) = 0;
3504 }
7d07dbc2
MB		 3505 else if (strEQ(s, "INIT") && !error_count) {
3506 if (!initav)
3507 initav = newAV();
3508 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3509 }
79072805 3510 }
a6006777 3511
aa689395 3512 done:
79072805 3513 copline = NOLINE;
8990e307 3514 LEAVE_SCOPE(floor);
a0d0e21e 3515 return cv;
79072805
LW		 3516}
3517
5476c433
JD		 3518void
3519newCONSTSUB(HV *stash, char *name, SV *sv)
3520{
3521 dTHR;
3522 U32 oldhints = hints;
3523 HV *old_cop_stash = curcop->cop_stash;
3524 HV *old_curstash = curstash;
3525 line_t oldline = curcop->cop_line;
3526 curcop->cop_line = copline;
3527
3528 hints &= ~HINT_BLOCK_SCOPE;
3529 if(stash)
3530 curstash = curcop->cop_stash = stash;
3531
3532 newSUB(
be24f278 3533 start_subparse(FALSE, 0),
5476c433
JD		 3534 newSVOP(OP_CONST, 0, newSVpv(name,0)),
3535 newSVOP(OP_CONST, 0, &sv_no), /* SvPV(&sv_no) == "" -- GMB */
3536 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
3537 );
3538
3539 hints = oldhints;
3540 curcop->cop_stash = old_cop_stash;
3541 curstash = old_curstash;
3542 curcop->cop_line = oldline;
3543}
3544
57d3b86d 3545CV *
aeea060c 3546newXS(char *name, void (*subaddr) (CV *), char *filename)
a0d0e21e 3547{
11343788 3548 dTHR;
44a8e56a 3549 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3550 register CV *cv;
44a8e56a 3551
3552 if (cv = (name ? GvCV(gv) : Nullcv)) {
3553 if (GvCVGEN(gv)) {
3554 /* just a cached method */
3555 SvREFCNT_dec(cv);
3556 cv = 0;
3557 }
3558 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3559 /* already defined (or promised) */
2f34f9d4
IZ		 3560 if (dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
3561 && HvNAME(GvSTASH(CvGV(cv)))
3562 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
a0d0e21e 3563 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3564 curcop->cop_line = copline;
3565 warn("Subroutine %s redefined",name);
3566 curcop->cop_line = oldline;
3567 }
3568 SvREFCNT_dec(cv);
3569 cv = 0;
79072805 3570 }
79072805 3571 }
44a8e56a 3572
3573 if (cv) /* must reuse cv if autoloaded */
3574 cv_undef(cv);
a0d0e21e
LW		 3575 else {
3576 cv = (CV*)NEWSV(1105,0);
3577 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3578 if (name) {
3579 GvCV(gv) = cv;
3580 GvCVGEN(gv) = 0;
3581 sub_generation++;
3582 }
a0d0e21e 3583 }
5196be3e 3584 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3585#ifdef USE_THREADS
12ca11f6 3586 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3587 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3588 CvOWNER(cv) = 0;
3589#endif /* USE_THREADS */
79072805 3590 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3591 CvXSUB(cv) = subaddr;
44a8e56a 3592
28757baa 3593 if (name) {
3594 char *s = strrchr(name,':');
3595 if (s)
3596 s++;
3597 else
3598 s = name;
3599 if (strEQ(s, "BEGIN")) {
3600 if (!beginav)
3601 beginav = newAV();
44a8e56a 3602 av_push(beginav, (SV *)cv);
3603 GvCV(gv) = 0;
28757baa 3604 }
3605 else if (strEQ(s, "END")) {
3606 if (!endav)
3607 endav = newAV();
3608 av_unshift(endav, 1);
44a8e56a 3609 av_store(endav, 0, (SV *)cv);
3610 GvCV(gv) = 0;
28757baa 3611 }
7d07dbc2
MB		 3612 else if (strEQ(s, "INIT")) {
3613 if (!initav)
3614 initav = newAV();
3615 av_push(initav, (SV *)cv);
ae77835f 3616 }
28757baa 3617 }
8990e307 3618 else
a5f75d66 3619 CvANON_on(cv);
44a8e56a 3620
a0d0e21e 3621 return cv;
79072805
LW		 3622}
3623
3624void
8ac85365 3625newFORM(I32 floor, OP *o, OP *block)
79072805 3626{
11343788 3627 dTHR;
79072805
LW		 3628 register CV *cv;
3629 char *name;
3630 GV *gv;
a0d0e21e 3631 I32 ix;
79072805 3632
11343788
MB		 3633 if (o)
3634 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3635 else
3636 name = "STDOUT";
85e6fe83 3637 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3638 GvMULTI_on(gv);
79072805
LW		 3639 if (cv = GvFORM(gv)) {
3640 if (dowarn) {
3641 line_t oldline = curcop->cop_line;
3642
3643 curcop->cop_line = copline;
3644 warn("Format %s redefined",name);
3645 curcop->cop_line = oldline;
3646 }
8990e307 3647 SvREFCNT_dec(cv);
79072805 3648 }
748a9306 3649 cv = compcv;
79072805 3650 GvFORM(gv) = cv;
44a8e56a 3651 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3652 CvFILEGV(cv) = curcop->cop_filegv;
3653
93965878 3654 for (ix = AvFILLp(comppad); ix > 0; ix--) {
44a8e56a 3655 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3656 SvPADTMP_on(curpad[ix]);
3657 }
3658
79072805
LW		 3659 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3660 CvSTART(cv) = LINKLIST(CvROOT(cv));
3661 CvROOT(cv)->op_next = 0;
3662 peep(CvSTART(cv));
11343788 3663 op_free(o);
79072805 3664 copline = NOLINE;
8990e307 3665 LEAVE_SCOPE(floor);
79072805
LW		 3666}
3667
3668OP *
8ac85365 3669newANONLIST(OP *o)
79072805 3670{
93a17b20 3671 return newUNOP(OP_REFGEN, 0,
11343788 3672 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3673}
3674
3675OP *
8ac85365 3676newANONHASH(OP *o)
79072805 3677{
93a17b20 3678 return newUNOP(OP_REFGEN, 0,
11343788 3679 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3680}
3681
3682OP *
8ac85365 3683newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3684{
3685 return newUNOP(OP_REFGEN, 0,
4633a7c4 3686 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3687}
3688
3689OP *
8ac85365 3690oopsAV(OP *o)
79072805 3691{
ed6116ce
LW		 3692 switch (o->op_type) {
3693 case OP_PADSV:
3694 o->op_type = OP_PADAV;
3695 o->op_ppaddr = ppaddr[OP_PADAV];
3696 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3697
3698 case OP_RV2SV:
79072805
LW		 3699 o->op_type = OP_RV2AV;
3700 o->op_ppaddr = ppaddr[OP_RV2AV];
3701 ref(o, OP_RV2AV);
ed6116ce
LW		 3702 break;
3703
3704 default:
79072805 3705 warn("oops: oopsAV");
ed6116ce
LW		 3706 break;
3707 }
79072805
LW		 3708 return o;
3709}
3710
3711OP *
8ac85365 3712oopsHV(OP *o)
79072805 3713{
ed6116ce
LW		 3714 switch (o->op_type) {
3715 case OP_PADSV:
3716 case OP_PADAV:
3717 o->op_type = OP_PADHV;
3718 o->op_ppaddr = ppaddr[OP_PADHV];
3719 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3720
3721 case OP_RV2SV:
3722 case OP_RV2AV:
79072805
LW		 3723 o->op_type = OP_RV2HV;
3724 o->op_ppaddr = ppaddr[OP_RV2HV];
3725 ref(o, OP_RV2HV);
ed6116ce
LW		 3726 break;
3727
3728 default:
79072805 3729 warn("oops: oopsHV");
ed6116ce
LW		 3730 break;
3731 }
79072805
LW		 3732 return o;
3733}
3734
3735OP *
8ac85365 3736newAVREF(OP *o)
79072805 3737{
ed6116ce
LW		 3738 if (o->op_type == OP_PADANY) {
3739 o->op_type = OP_PADAV;
3740 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3741 return o;
ed6116ce 3742 }
79072805
LW		 3743 return newUNOP(OP_RV2AV, 0, scalar(o));
3744}
3745
3746OP *
8ac85365 3747newGVREF(I32 type, OP *o)
79072805 3748{
a0d0e21e
LW		 3749 if (type == OP_MAPSTART)
3750 return newUNOP(OP_NULL, 0, o);
748a9306 3751 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3752}
3753
3754OP *
8ac85365 3755newHVREF(OP *o)
79072805 3756{
ed6116ce
LW		 3757 if (o->op_type == OP_PADANY) {
3758 o->op_type = OP_PADHV;
3759 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3760 return o;
ed6116ce 3761 }
79072805
LW		 3762 return newUNOP(OP_RV2HV, 0, scalar(o));
3763}
3764
3765OP *
8ac85365 3766oopsCV(OP *o)
79072805 3767{
463ee0b2 3768 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3769 /* STUB */
3770 return o;
3771}
3772
3773OP *
8ac85365 3774newCVREF(I32 flags, OP *o)
79072805 3775{
c07a80fd 3776 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3777}
3778
3779OP *
8ac85365 3780newSVREF(OP *o)
79072805 3781{
ed6116ce
LW		 3782 if (o->op_type == OP_PADANY) {
3783 o->op_type = OP_PADSV;
3784 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3785 return o;
ed6116ce 3786 }
224a4551
MB		 3787 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
3788 o->op_flags |= OPpDONE_SVREF;
a863c7d1 3789 return o;
224a4551 3790 }
79072805
LW		 3791 return newUNOP(OP_RV2SV, 0, scalar(o));
3792}
3793
3794/* Check routines. */
3795
3796OP *
8ac85365 3797ck_anoncode(OP *o)
5f05dabc 3798{
178c6305
CS		 3799 PADOFFSET ix;
3800 SV* name;
3801
3802 name = NEWSV(1106,0);
3803 sv_upgrade(name, SVt_PVNV);
3804 sv_setpvn(name, "&", 1);
3805 SvIVX(name) = -1;
3806 SvNVX(name) = 1;
5dc0d613 3807 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3808 av_store(comppad_name, ix, name);
5dc0d613
MB		 3809 av_store(comppad, ix, cSVOPo->op_sv);
3810 SvPADMY_on(cSVOPo->op_sv);
3811 cSVOPo->op_sv = Nullsv;
3812 cSVOPo->op_targ = ix;
3813 return o;
5f05dabc 3814}
3815
3816OP *
8ac85365 3817ck_bitop(OP *o)
55497cff 3818{
5dc0d613
MB		 3819 o->op_private = hints;
3820 return o;
55497cff 3821}
3822
3823OP *
8ac85365 3824ck_concat(OP *o)
79072805 3825{
11343788
MB		 3826 if (cUNOPo->op_first->op_type == OP_CONCAT)
3827 o->op_flags |= OPf_STACKED;
3828 return o;
79072805
LW		 3829}
3830
3831OP *
8ac85365 3832ck_spair(OP *o)
79072805 3833{
11343788 3834 if (o->op_flags & OPf_KIDS) {
79072805 3835 OP* newop;
a0d0e21e 3836 OP* kid;
5dc0d613
MB		 3837 OPCODE type = o->op_type;
3838 o = modkids(ck_fun(o), type);
11343788 3839 kid = cUNOPo->op_first;
a0d0e21e
LW		 3840 newop = kUNOP->op_first->op_sibling;
3841 if (newop &&
3842 (newop->op_sibling ||
3843 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3844 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3845 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3846
11343788 3847 return o;
a0d0e21e
LW		 3848 }
3849 op_free(kUNOP->op_first);
3850 kUNOP->op_first = newop;
3851 }
11343788
MB		 3852 o->op_ppaddr = ppaddr[++o->op_type];
3853 return ck_fun(o);
a0d0e21e
LW		 3854}
3855
3856OP *
8ac85365 3857ck_delete(OP *o)
a0d0e21e 3858{
11343788 3859 o = ck_fun(o);
5dc0d613 3860 o->op_private = 0;
11343788
MB		 3861 if (o->op_flags & OPf_KIDS) {
3862 OP *kid = cUNOPo->op_first;
5f05dabc 3863 if (kid->op_type == OP_HSLICE)
5dc0d613 3864 o->op_private |= OPpSLICE;
5f05dabc 3865 else if (kid->op_type != OP_HELEM)
3866 croak("%s argument is not a HASH element or slice",
5dc0d613 3867 op_desc[o->op_type]);
a0d0e21e 3868 null(kid);
79072805 3869 }
11343788 3870 return o;
79072805
LW		 3871}
3872
3873OP *
8ac85365 3874ck_eof(OP *o)
79072805 3875{
11343788 3876 I32 type = o->op_type;
79072805 3877
11343788
MB		 3878 if (o->op_flags & OPf_KIDS) {
3879 if (cLISTOPo->op_first->op_type == OP_STUB) {
3880 op_free(o);
3881 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 3882 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 3883 }
11343788 3884 return ck_fun(o);
79072805 3885 }
11343788 3886 return o;
79072805
LW		 3887}
3888
3889OP *
8ac85365 3890ck_eval(OP *o)
79072805 3891{
85e6fe83 3892 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 3893 if (o->op_flags & OPf_KIDS) {
3894 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 3895
93a17b20 3896 if (!kid) {
11343788
MB		 3897 o->op_flags &= ~OPf_KIDS;
3898 null(o);
79072805
LW		 3899 }
3900 else if (kid->op_type == OP_LINESEQ) {
3901 LOGOP *enter;
3902
11343788
MB		 3903 kid->op_next = o->op_next;
3904 cUNOPo->op_first = 0;
3905 op_free(o);
79072805
LW		 3906
3907 Newz(1101, enter, 1, LOGOP);
3908 enter->op_type = OP_ENTERTRY;
3909 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
3910 enter->op_private = 0;
3911
3912 /* establish postfix order */
3913 enter->op_next = (OP*)enter;
3914
11343788
MB		 3915 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
3916 o->op_type = OP_LEAVETRY;
3917 o->op_ppaddr = ppaddr[OP_LEAVETRY];
3918 enter->op_other = o;
3919 return o;
79072805 3920 }
c7cc6f1c 3921 else
473986ff 3922 scalar((OP*)kid);
79072805
LW		 3923 }
3924 else {
11343788 3925 op_free(o);
54b9620d 3926 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 3927 }
11343788
MB		 3928 o->op_targ = (PADOFFSET)hints;
3929 return o;
79072805
LW		 3930}
3931
3932OP *
8ac85365 3933ck_exec(OP *o)
79072805
LW		 3934{
3935 OP *kid;
11343788
MB		 3936 if (o->op_flags & OPf_STACKED) {
3937 o = ck_fun(o);
3938 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 3939 if (kid->op_type == OP_RV2GV)
3940 null(kid);
79072805 3941 }
463ee0b2 3942 else
11343788
MB		 3943 o = listkids(o);
3944 return o;
79072805
LW		 3945}
3946
3947OP *
8ac85365 3948ck_exists(OP *o)
5f05dabc 3949{
5196be3e
MB		 3950 o = ck_fun(o);
3951 if (o->op_flags & OPf_KIDS) {
3952 OP *kid = cUNOPo->op_first;
5f05dabc 3953 if (kid->op_type != OP_HELEM)
5196be3e 3954 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 3955 null(kid);
3956 }
5196be3e 3957 return o;
5f05dabc 3958}
3959
3960OP *
8ac85365 3961ck_gvconst(register OP *o)
79072805
LW		 3962{
3963 o = fold_constants(o);
3964 if (o->op_type == OP_CONST)
3965 o->op_type = OP_GV;
3966 return o;
3967}
3968
3969OP *
8ac85365 3970ck_rvconst(register OP *o)
79072805 3971{
11343788
MB		 3972 dTHR;
3973 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 3974
11343788 3975 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 3976 if (kid->op_type == OP_CONST) {
44a8e56a 3977 char *name;
3978 int iscv;
3979 GV *gv;
3980
3981 name = SvPV(kid->op_sv, na);
3982 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
3983 char *badthing = Nullch;
5dc0d613 3984 switch (o->op_type) {
44a8e56a 3985 case OP_RV2SV:
3986 badthing = "a SCALAR";
3987 break;
3988 case OP_RV2AV:
3989 badthing = "an ARRAY";
3990 break;
3991 case OP_RV2HV:
3992 badthing = "a HASH";
3993 break;
3994 }
3995 if (badthing)
3996 croak(
3997 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
3998 name, badthing);
3999 }
93233ece
CS		 4000 /*
4001 * This is a little tricky. We only want to add the symbol if we
4002 * didn't add it in the lexer. Otherwise we get duplicate strict
4003 * warnings. But if we didn't add it in the lexer, we must at
4004 * least pretend like we wanted to add it even if it existed before,
4005 * or we get possible typo warnings. OPpCONST_ENTERED says
4006 * whether the lexer already added THIS instance of this symbol.
4007 */
5196be3e 4008 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4009 do {
44a8e56a 4010 gv = gv_fetchpv(name,
748a9306 4011 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4012 iscv
4013 ? SVt_PVCV
11343788 4014 : o->op_type == OP_RV2SV
a0d0e21e 4015 ? SVt_PV
11343788 4016 : o->op_type == OP_RV2AV
a0d0e21e 4017 ? SVt_PVAV
11343788 4018 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4019 ? SVt_PVHV
4020 : SVt_PVGV);
93233ece
CS		 4021 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4022 if (gv) {
4023 kid->op_type = OP_GV;
4024 SvREFCNT_dec(kid->op_sv);
4025 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4026 }
79072805 4027 }
11343788 4028 return o;
79072805
LW		 4029}
4030
4031OP *
8ac85365 4032ck_ftst(OP *o)
79072805 4033{
11343788
MB		 4034 dTHR;
4035 I32 type = o->op_type;
79072805 4036
11343788
MB		 4037 if (o->op_flags & OPf_REF)
4038 return o;
79072805 4039
11343788
MB		 4040 if (o->op_flags & OPf_KIDS) {
4041 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4042
4043 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4044 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 4045 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 4046 op_free(o);
79072805
LW		 4047 return newop;
4048 }
4049 }
4050 else {
11343788 4051 op_free(o);
79072805 4052 if (type == OP_FTTTY)
fb73857a 4053 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4054 SVt_PVIO));
79072805 4055 else
54b9620d 4056 return newUNOP(type, 0, newDEFSVOP());
79072805 4057 }
11343788 4058 return o;
79072805
LW		 4059}
4060
4061OP *
8ac85365 4062ck_fun(OP *o)
79072805 4063{
11343788 4064 dTHR;
79072805
LW		 4065 register OP *kid;
4066 OP **tokid;
4067 OP *sibl;
4068 I32 numargs = 0;
11343788 4069 int type = o->op_type;
a0d0e21e 4070 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4071
11343788 4072 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4073 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4074 oa &= ~OA_OPTIONAL;
4075 else
11343788 4076 return no_fh_allowed(o);
79072805
LW		 4077 }
4078
11343788
MB		 4079 if (o->op_flags & OPf_KIDS) {
4080 tokid = &cLISTOPo->op_first;
4081 kid = cLISTOPo->op_first;
8990e307
LW		 4082 if (kid->op_type == OP_PUSHMARK ||
4083 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4084 {
79072805
LW		 4085 tokid = &kid->op_sibling;
4086 kid = kid->op_sibling;
4087 }
a0d0e21e 4088 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4089 *tokid = kid = newDEFSVOP();
79072805
LW		 4090
4091 while (oa && kid) {
4092 numargs++;
4093 sibl = kid->op_sibling;
4094 switch (oa & 7) {
4095 case OA_SCALAR:
4096 scalar(kid);
4097 break;
4098 case OA_LIST:
4099 if (oa < 16) {
4100 kid = 0;
4101 continue;
4102 }
4103 else
4104 list(kid);
4105 break;
4106 case OA_AVREF:
4107 if (kid->op_type == OP_CONST &&
4108 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4109 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4110 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4111 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4112 if (dowarn)
ff0cee69 4113 warn("Array @%s missing the @ in argument %ld of %s()",
4114 name, (long)numargs, op_desc[type]);
79072805
LW		 4115 op_free(kid);
4116 kid = newop;
4117 kid->op_sibling = sibl;
4118 *tokid = kid;
4119 }
8990e307 4120 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4121 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4122 mod(kid, type);
79072805
LW		 4123 break;
4124 case OA_HVREF:
4125 if (kid->op_type == OP_CONST &&
4126 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4127 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4128 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4129 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4130 if (dowarn)
ff0cee69 4131 warn("Hash %%%s missing the %% in argument %ld of %s()",
4132 name, (long)numargs, op_desc[type]);
79072805
LW		 4133 op_free(kid);
4134 kid = newop;
4135 kid->op_sibling = sibl;
4136 *tokid = kid;
4137 }
8990e307 4138 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4139 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4140 mod(kid, type);
79072805
LW		 4141 break;
4142 case OA_CVREF:
4143 {
a0d0e21e 4144 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4145 kid->op_sibling = 0;
4146 linklist(kid);
4147 newop->op_next = newop;
4148 kid = newop;
4149 kid->op_sibling = sibl;
4150 *tokid = kid;
4151 }
4152 break;
4153 case OA_FILEREF:
4154 if (kid->op_type != OP_GV) {
4155 if (kid->op_type == OP_CONST &&
4156 (kid->op_private & OPpCONST_BARE)) {
4157 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4158 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4159 SVt_PVIO) );
79072805
LW		 4160 op_free(kid);
4161 kid = newop;
4162 }
4163 else {
4164 kid->op_sibling = 0;
4165 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4166 }
4167 kid->op_sibling = sibl;
4168 *tokid = kid;
4169 }
4170 scalar(kid);
4171 break;
4172 case OA_SCALARREF:
a0d0e21e 4173 mod(scalar(kid), type);
79072805
LW		 4174 break;
4175 }
4176 oa >>= 4;
4177 tokid = &kid->op_sibling;
4178 kid = kid->op_sibling;
4179 }
11343788 4180 o->op_private |= numargs;
79072805 4181 if (kid)
11343788
MB		 4182 return too_many_arguments(o,op_desc[o->op_type]);
4183 listkids(o);
79072805 4184 }
a0d0e21e 4185 else if (opargs[type] & OA_DEFGV) {
11343788 4186 op_free(o);
54b9620d 4187 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4188 }
4189
79072805
LW		 4190 if (oa) {
4191 while (oa & OA_OPTIONAL)
4192 oa >>= 4;
4193 if (oa && oa != OA_LIST)
11343788 4194 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4195 }
11343788 4196 return o;
79072805
LW		 4197}
4198
4199OP *
8ac85365 4200ck_glob(OP *o)
79072805 4201{
fb73857a 4202 GV *gv;
4203
1f2bfc8a 4204 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4205 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4206
4207 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4208 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4209
4210 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4211 static int glob_index;
4212
5196be3e 4213 append_elem(OP_GLOB, o,
46fc3d4c 4214 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4215 o->op_type = OP_LIST;
4216 o->op_ppaddr = ppaddr[OP_LIST];
4217 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4218 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4219 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4220 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4221 scalar(newUNOP(OP_RV2CV, 0,
4222 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4223 o = newUNOP(OP_NULL, 0, ck_subr(o));
4224 o->op_targ = OP_GLOB; /* hint at what it used to be */
4225 return o;
b1cb66bf 4226 }
4227 gv = newGVgen("main");
a0d0e21e 4228 gv_IOadd(gv);
11343788
MB		 4229 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4230 scalarkids(o);
4231 return ck_fun(o);
79072805
LW		 4232}
4233
4234OP *
8ac85365 4235ck_grep(OP *o)
79072805
LW		 4236{
4237 LOGOP *gwop;
4238 OP *kid;
11343788 4239 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4240
11343788 4241 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4242 Newz(1101, gwop, 1, LOGOP);
aeea060c 4243
11343788 4244 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4245 OP* k;
11343788
MB		 4246 o = ck_sort(o);
4247 kid = cLISTOPo->op_first->op_sibling;
4248 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4249 kid = k;
4250 }
4251 kid->op_next = (OP*)gwop;
11343788 4252 o->op_flags &= ~OPf_STACKED;
93a17b20 4253 }
11343788 4254 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4255 if (type == OP_MAPWHILE)
4256 list(kid);
4257 else
4258 scalar(kid);
11343788 4259 o = ck_fun(o);
79072805 4260 if (error_count)
11343788 4261 return o;
aeea060c 4262 kid = cLISTOPo->op_first->op_sibling;
79072805 4263 if (kid->op_type != OP_NULL)
463ee0b2 4264 croak("panic: ck_grep");
79072805
LW		 4265 kid = kUNOP->op_first;
4266
a0d0e21e
LW		 4267 gwop->op_type = type;
4268 gwop->op_ppaddr = ppaddr[type];
11343788 4269 gwop->op_first = listkids(o);
79072805
LW		 4270 gwop->op_flags |= OPf_KIDS;
4271 gwop->op_private = 1;
4272 gwop->op_other = LINKLIST(kid);
a0d0e21e 4273 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4274 kid->op_next = (OP*)gwop;
4275
11343788 4276 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4277 if (!kid || !kid->op_sibling)
11343788 4278 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4279 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4280 mod(kid, OP_GREPSTART);
4281
79072805
LW		 4282 return (OP*)gwop;
4283}
4284
4285OP *
8ac85365 4286ck_index(OP *o)
79072805 4287{
11343788
MB		 4288 if (o->op_flags & OPf_KIDS) {
4289 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4290 if (kid && kid->op_type == OP_CONST)
2779dcf1 4291 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4292 }
11343788 4293 return ck_fun(o);
79072805
LW		 4294}
4295
4296OP *
8ac85365 4297ck_lengthconst(OP *o)
79072805
LW		 4298{
4299 /* XXX length optimization goes here */
11343788 4300 return ck_fun(o);
79072805
LW		 4301}
4302
4303OP *
8ac85365 4304ck_lfun(OP *o)
79072805 4305{
5dc0d613
MB		 4306 OPCODE type = o->op_type;
4307 return modkids(ck_fun(o), type);
79072805
LW		 4308}
4309
4310OP *
8ac85365 4311ck_rfun(OP *o)
8990e307 4312{
5dc0d613
MB		 4313 OPCODE type = o->op_type;
4314 return refkids(ck_fun(o), type);
8990e307
LW		 4315}
4316
4317OP *
8ac85365 4318ck_listiob(OP *o)
79072805
LW		 4319{
4320 register OP *kid;
aeea060c 4321
11343788 4322 kid = cLISTOPo->op_first;
79072805 4323 if (!kid) {
11343788
MB		 4324 o = force_list(o);
4325 kid = cLISTOPo->op_first;
79072805
LW		 4326 }
4327 if (kid->op_type == OP_PUSHMARK)
4328 kid = kid->op_sibling;
11343788 4329 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4330 kid = kid->op_sibling;
4331 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4332 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4333 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4334 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4335 cLISTOPo->op_first->op_sibling = kid;
4336 cLISTOPo->op_last = kid;
79072805
LW		 4337 kid = kid->op_sibling;
4338 }
4339 }
4340
4341 if (!kid)
54b9620d 4342 append_elem(o->op_type, o, newDEFSVOP());
79072805 4343
5dc0d613 4344 o = listkids(o);
bbce6d69 4345
5dc0d613 4346 o->op_private = 0;
36477c24 4347#ifdef USE_LOCALE
bbce6d69 4348 if (hints & HINT_LOCALE)
5dc0d613 4349 o->op_private |= OPpLOCALE;
bbce6d69 4350#endif
4351
5dc0d613 4352 return o;
bbce6d69 4353}
4354
4355OP *
8ac85365 4356ck_fun_locale(OP *o)
bbce6d69 4357{
5dc0d613 4358 o = ck_fun(o);
bbce6d69 4359
5dc0d613 4360 o->op_private = 0;
36477c24 4361#ifdef USE_LOCALE
bbce6d69 4362 if (hints & HINT_LOCALE)
5dc0d613 4363 o->op_private |= OPpLOCALE;
bbce6d69 4364#endif
4365
5dc0d613 4366 return o;
bbce6d69 4367}
4368
4369OP *
8ac85365 4370ck_scmp(OP *o)
bbce6d69 4371{
5dc0d613 4372 o->op_private = 0;
36477c24 4373#ifdef USE_LOCALE
bbce6d69 4374 if (hints & HINT_LOCALE)
5dc0d613 4375 o->op_private |= OPpLOCALE;
bbce6d69 4376#endif
36477c24 4377
5dc0d613 4378 return o;
79072805
LW		 4379}
4380
4381OP *
8ac85365 4382ck_match(OP *o)
79072805 4383{
5dc0d613 4384 o->op_private |= OPpRUNTIME;
11343788 4385 return o;
79072805
LW		 4386}
4387
4388OP *
8ac85365 4389ck_null(OP *o)
79072805 4390{
11343788 4391 return o;
79072805
LW		 4392}
4393
4394OP *
8ac85365 4395ck_repeat(OP *o)
79072805 4396{
11343788
MB		 4397 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4398 o->op_private |= OPpREPEAT_DOLIST;
4399 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4400 }
4401 else
11343788
MB		 4402 scalar(o);
4403 return o;
79072805
LW		 4404}
4405
4406OP *
8ac85365 4407ck_require(OP *o)
8990e307 4408{
11343788
MB		 4409 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4410 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4411
4412 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4413 char *s;
a0d0e21e
LW		 4414 for (s = SvPVX(kid->op_sv); *s; s++) {
4415 if (*s == ':' && s[1] == ':') {
4416 *s = '/';
1aef975c 4417 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4418 --SvCUR(kid->op_sv);
4419 }
8990e307 4420 }
a0d0e21e 4421 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4422 }
4423 }
11343788 4424 return ck_fun(o);
8990e307
LW		 4425}
4426
4427OP *
8ac85365 4428ck_retarget(OP *o)
79072805 4429{
463ee0b2 4430 croak("NOT IMPL LINE %d",__LINE__);
79072805 4431 /* STUB */
11343788 4432 return o;
79072805
LW		 4433}
4434
4435OP *
8ac85365 4436ck_select(OP *o)
79072805 4437{
c07a80fd 4438 OP* kid;
11343788
MB		 4439 if (o->op_flags & OPf_KIDS) {
4440 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4441 if (kid && kid->op_sibling) {
11343788
MB		 4442 o->op_type = OP_SSELECT;
4443 o->op_ppaddr = ppaddr[OP_SSELECT];
4444 o = ck_fun(o);
4445 return fold_constants(o);
79072805
LW		 4446 }
4447 }
11343788
MB		 4448 o = ck_fun(o);
4449 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4450 if (kid && kid->op_type == OP_RV2GV)
4451 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4452 return o;
79072805
LW		 4453}
4454
4455OP *
8ac85365 4456ck_shift(OP *o)
79072805 4457{
11343788 4458 I32 type = o->op_type;
79072805 4459
11343788 4460 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4461 OP *argop;
4462
11343788 4463 op_free(o);
6d4ff0d2 4464#ifdef USE_THREADS
977336f5 4465 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4466 argop = newOP(OP_PADAV, OPf_REF);
4467 argop->op_targ = 0; /* curpad[0] is @_ */
4468 }
4469 else {
4470 argop = newUNOP(OP_RV2AV, 0,
4471 scalar(newGVOP(OP_GV, 0,
4472 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4473 }
4474#else
4475 argop = newUNOP(OP_RV2AV, 0,
977336f5 4476 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4477 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4478#endif /* USE_THREADS */
4479 return newUNOP(type, 0, scalar(argop));
79072805 4480 }
11343788 4481 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4482}
4483
4484OP *
8ac85365 4485ck_sort(OP *o)
79072805 4486{
5dc0d613 4487 o->op_private = 0;
36477c24 4488#ifdef USE_LOCALE
bbce6d69 4489 if (hints & HINT_LOCALE)
5dc0d613 4490 o->op_private |= OPpLOCALE;
bbce6d69 4491#endif
4492
11343788
MB		 4493 if (o->op_flags & OPf_STACKED) {
4494 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4495 OP *k;
4496 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4497
463ee0b2 4498 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4499 linklist(kid);
463ee0b2
LW		 4500 if (kid->op_type == OP_SCOPE) {
4501 k = kid->op_next;
4502 kid->op_next = 0;
79072805 4503 }
463ee0b2 4504 else if (kid->op_type == OP_LEAVE) {
11343788 4505 if (o->op_type == OP_SORT) {
748a9306
LW		 4506 null(kid); /* wipe out leave */
4507 kid->op_next = kid;
463ee0b2 4508
748a9306
LW		 4509 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4510 if (k->op_next == kid)
4511 k->op_next = 0;
4512 }
463ee0b2 4513 }
748a9306
LW		 4514 else
4515 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4516 k = kLISTOP->op_first;
463ee0b2 4517 }
a0d0e21e
LW		 4518 peep(k);
4519
11343788 4520 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4521 null(kid); /* wipe out rv2gv */
11343788 4522 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4523 kid->op_next = kid;
4524 else
4525 kid->op_next = k;
11343788 4526 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4527 }
4528 }
bbce6d69 4529
11343788 4530 return o;
79072805
LW		 4531}
4532
4533OP *
8ac85365 4534ck_split(OP *o)
79072805
LW		 4535{
4536 register OP *kid;
aeea060c 4537
11343788
MB		 4538 if (o->op_flags & OPf_STACKED)
4539 return no_fh_allowed(o);
79072805 4540
11343788 4541 kid = cLISTOPo->op_first;
8990e307 4542 if (kid->op_type != OP_NULL)
463ee0b2 4543 croak("panic: ck_split");
8990e307 4544 kid = kid->op_sibling;
11343788
MB		 4545 op_free(cLISTOPo->op_first);
4546 cLISTOPo->op_first = kid;
85e6fe83 4547 if (!kid) {
11343788
MB		 4548 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4549 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4550 }
79072805
LW		 4551
4552 if (kid->op_type != OP_MATCH) {
4553 OP *sibl = kid->op_sibling;
463ee0b2 4554 kid->op_sibling = 0;
79072805 4555 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4556 if (cLISTOPo->op_first == cLISTOPo->op_last)
4557 cLISTOPo->op_last = kid;
4558 cLISTOPo->op_first = kid;
79072805
LW		 4559 kid->op_sibling = sibl;
4560 }
4561
4562 kid->op_type = OP_PUSHRE;
4563 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4564 scalar(kid);
4565
4566 if (!kid->op_sibling)
54b9620d 4567 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4568
4569 kid = kid->op_sibling;
4570 scalar(kid);
4571
4572 if (!kid->op_sibling)
11343788 4573 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4574
4575 kid = kid->op_sibling;
4576 scalar(kid);
4577
4578 if (kid->op_sibling)
11343788 4579 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4580
11343788 4581 return o;
79072805
LW		 4582}
4583
4584OP *
8ac85365 4585ck_subr(OP *o)
79072805 4586{
11343788
MB		 4587 dTHR;
4588 OP *prev = ((cUNOPo->op_first->op_sibling)
4589 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4590 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4591 OP *cvop;
4592 char *proto = 0;
4593 CV *cv = 0;
46fc3d4c 4594 GV *namegv = 0;
4633a7c4
LW		 4595 int optional = 0;
4596 I32 arg = 0;
4597
11343788 4598 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4599 if (cvop->op_type == OP_RV2CV) {
4600 SVOP* tmpop;
11343788 4601 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4602 null(cvop); /* disable rv2cv */
4603 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4604 if (tmpop->op_type == OP_GV) {
8ebc5c01 4605 cv = GvCVu(tmpop->op_sv);
5dc0d613 4606 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4607 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4608 proto = SvPV((SV*)cv, na);
4609 }
4633a7c4
LW		 4610 }
4611 }
11343788 4612 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4613 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4614 o->op_private |= OPpENTERSUB_DB;
4615 while (o2 != cvop) {
4633a7c4
LW		 4616 if (proto) {
4617 switch (*proto) {
4618 case '\0':
5dc0d613 4619 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4620 case ';':
4621 optional = 1;
4622 proto++;
4623 continue;
4624 case '$':
4625 proto++;
4626 arg++;
11343788 4627 scalar(o2);
4633a7c4
LW		 4628 break;
4629 case '%':
4630 case '@':
11343788 4631 list(o2);
4633a7c4
LW		 4632 arg++;
4633 break;
4634 case '&':
4635 proto++;
4636 arg++;
11343788 4637 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4638 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4639 break;
4640 case '*':
4641 proto++;
4642 arg++;
11343788 4643 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4644 goto wrapref;
4645 {
11343788 4646 OP* kid = o2;
69dcf70c 4647 OP* sib = kid->op_sibling;
4633a7c4 4648 kid->op_sibling = 0;
69dcf70c
MB		 4649 o2 = newUNOP(OP_RV2GV, 0, kid);
4650 o2->op_sibling = sib;
6fa846a0 4651 prev->op_sibling = o2;
4633a7c4
LW		 4652 }
4653 goto wrapref;
4654 case '\\':
4655 proto++;
4656 arg++;
4657 switch (*proto++) {
4658 case '*':
11343788 4659 if (o2->op_type != OP_RV2GV)
5dc0d613 4660 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4661 goto wrapref;
4662 case '&':
11343788 4663 if (o2->op_type != OP_RV2CV)
5dc0d613 4664 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4665 goto wrapref;
4666 case '$':
11343788 4667 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4668 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4669 goto wrapref;
4670 case '@':
11343788 4671 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4672 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4673 goto wrapref;
4674 case '%':
11343788 4675 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4676 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4677 wrapref:
4678 {
11343788 4679 OP* kid = o2;
6fa846a0 4680 OP* sib = kid->op_sibling;
4633a7c4 4681 kid->op_sibling = 0;
6fa846a0
GS		 4682 o2 = newUNOP(OP_REFGEN, 0, kid);
4683 o2->op_sibling = sib;
e858de61 4684 prev->op_sibling = o2;
4633a7c4
LW		 4685 }
4686 break;
4687 default: goto oops;
4688 }
4689 break;
b1cb66bf 4690 case ' ':
4691 proto++;
4692 continue;
4633a7c4
LW		 4693 default:
4694 oops:
4695 croak("Malformed prototype for %s: %s",
46fc3d4c 4696 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4697 }
4698 }
4699 else
11343788
MB		 4700 list(o2);
4701 mod(o2, OP_ENTERSUB);
4702 prev = o2;
4703 o2 = o2->op_sibling;
4633a7c4 4704 }
fb73857a 4705 if (proto && !optional &&
4706 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4707 return too_few_arguments(o, gv_ename(namegv));
11343788 4708 return o;
79072805
LW		 4709}
4710
4711OP *
8ac85365 4712ck_svconst(OP *o)
8990e307 4713{
11343788
MB		 4714 SvREADONLY_on(cSVOPo->op_sv);
4715 return o;
8990e307
LW		 4716}
4717
4718OP *
8ac85365 4719ck_trunc(OP *o)
79072805 4720{
11343788
MB		 4721 if (o->op_flags & OPf_KIDS) {
4722 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4723
a0d0e21e
LW		 4724 if (kid->op_type == OP_NULL)
4725 kid = (SVOP*)kid->op_sibling;
4726 if (kid &&
4727 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4728 o->op_flags |= OPf_SPECIAL;
79072805 4729 }
11343788 4730 return ck_fun(o);
79072805
LW		 4731}
4732
463ee0b2
LW		 4733/* A peephole optimizer. We visit the ops in the order they're to execute. */
4734
79072805 4735void
8ac85365 4736peep(register OP *o)
79072805 4737{
11343788 4738 dTHR;
79072805 4739 register OP* oldop = 0;
a0d0e21e 4740 if (!o || o->op_seq)
79072805 4741 return;
a0d0e21e 4742 ENTER;
462e5cf6 4743 SAVEOP();
a0d0e21e
LW		 4744 SAVESPTR(curcop);
4745 for (; o; o = o->op_next) {
4746 if (o->op_seq)
4747 break;
c07a80fd 4748 if (!op_seqmax)
4749 op_seqmax++;
a0d0e21e
LW		 4750 op = o;
4751 switch (o->op_type) {
4752 case OP_NEXTSTATE:
4753 case OP_DBSTATE:
4754 curcop = ((COP*)o); /* for warnings */
c07a80fd 4755 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4756 break;
4757
4758 case OP_CONCAT:
4759 case OP_CONST:
4760 case OP_JOIN:
4761 case OP_UC:
4762 case OP_UCFIRST:
4763 case OP_LC:
4764 case OP_LCFIRST:
4765 case OP_QUOTEMETA:
3c4f770c 4766 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4767 null(o->op_next);
c07a80fd 4768 o->op_seq = op_seqmax++;
a0d0e21e 4769 break;
8990e307 4770 case OP_STUB:
54310121 4771 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4772 o->op_seq = op_seqmax++;
54310121 4773 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4774 }
748a9306 4775 goto nothin;
79072805 4776 case OP_NULL:
748a9306 4777 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
7766148a 4778 curcop = ((COP*)o);
748a9306 4779 goto nothin;
79072805 4780 case OP_SCALAR:
93a17b20 4781 case OP_LINESEQ:
463ee0b2 4782 case OP_SCOPE:
748a9306 4783 nothin:
a0d0e21e
LW		 4784 if (oldop && o->op_next) {
4785 oldop->op_next = o->op_next;
79072805
LW		 4786 continue;
4787 }
c07a80fd 4788 o->op_seq = op_seqmax++;
79072805
LW		 4789 break;
4790
4791 case OP_GV:
a0d0e21e 4792 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4793 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4794 null(o->op_next);
4795 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4796 o->op_next = o->op_next->op_next;
4797 o->op_type = OP_GVSV;
4798 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4799 }
4800 }
a0d0e21e
LW		 4801 else if (o->op_next->op_type == OP_RV2AV) {
4802 OP* pop = o->op_next->op_next;
4803 IV i;
8990e307 4804 if (pop->op_type == OP_CONST &&
e858de61 4805 (op = pop->op_next) &&
8990e307 4806 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4807 !(pop->op_next->op_private &
68dc0745 4808 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4809 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4810 <= 255 &&
8990e307
LW		 4811 i >= 0)
4812 {
748a9306 4813 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4814 null(o->op_next);
8990e307
LW		 4815 null(pop->op_next);
4816 null(pop);
a0d0e21e
LW		 4817 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4818 o->op_next = pop->op_next->op_next;
4819 o->op_type = OP_AELEMFAST;
4820 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4821 o->op_private = (U8)i;
a6006777 4822 GvAVn(((GVOP*)o)->op_gv);
8990e307 4823 }
79072805 4824 }
c07a80fd 4825 o->op_seq = op_seqmax++;
79072805
LW		 4826 break;
4827
af41f3ca
MB		 4828 case OP_PADAV:
4829 if (o->op_next->op_type == OP_RV2AV
4830 && (o->op_next->op_flags && OPf_REF))
4831 {
4832 null(o->op_next);
4833 o->op_next = o->op_next->op_next;
4834 }
4835 break;
aeea060c 4836
af41f3ca
MB		 4837 case OP_PADHV:
4838 if (o->op_next->op_type == OP_RV2HV
4839 && (o->op_next->op_flags && OPf_REF))
4840 {
4841 null(o->op_next);
4842 o->op_next = o->op_next->op_next;
4843 }
4844 break;
4845
a0d0e21e 4846 case OP_MAPWHILE:
79072805
LW		 4847 case OP_GREPWHILE:
4848 case OP_AND:
4849 case OP_OR:
c07a80fd 4850 o->op_seq = op_seqmax++;
fd4d1407
IZ		 4851 while (cLOGOP->op_other->op_type == OP_NULL)
4852 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 4853 peep(cLOGOP->op_other);
4854 break;
4855
4856 case OP_COND_EXPR:
c07a80fd 4857 o->op_seq = op_seqmax++;
79072805
LW		 4858 peep(cCONDOP->op_true);
4859 peep(cCONDOP->op_false);
4860 break;
4861
4862 case OP_ENTERLOOP:
c07a80fd 4863 o->op_seq = op_seqmax++;
79072805
LW		 4864 peep(cLOOP->op_redoop);
4865 peep(cLOOP->op_nextop);
4866 peep(cLOOP->op_lastop);
4867 break;
4868
4869 case OP_MATCH:
4870 case OP_SUBST:
c07a80fd 4871 o->op_seq = op_seqmax++;
a0d0e21e 4872 peep(cPMOP->op_pmreplstart);
79072805
LW		 4873 break;
4874
a0d0e21e 4875 case OP_EXEC:
c07a80fd 4876 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4877 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
4878 if (o->op_next->op_sibling &&
20408e3c
GS		 4879 o->op_next->op_sibling->op_type != OP_EXIT &&
4880 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e
LW		 4881 o->op_next->op_sibling->op_type != OP_DIE) {
4882 line_t oldline = curcop->cop_line;
4883
4884 curcop->cop_line = ((COP*)o->op_next)->cop_line;
4885 warn("Statement unlikely to be reached");
4886 warn("(Maybe you meant system() when you said exec()?)\n");
4887 curcop->cop_line = oldline;
4888 }
4889 }
4890 break;
aeea060c 4891
c750a3ec
MB		 4892 case OP_HELEM: {
4893 UNOP *rop;
4894 SV *lexname;
4895 GV **fields;
4896 SV **svp, **indsvp;
4897 I32 ind;
4898 char *key;
4899 STRLEN keylen;
aeea060c 4900
c750a3ec
MB		 4901 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
4902 || ((BINOP*)o)->op_last->op_type != OP_CONST)
4903 break;
4904 rop = (UNOP*)((BINOP*)o)->op_first;
4905 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
4906 break;
4907 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
4908 if (!SvOBJECT(lexname))
4909 break;
5196be3e 4910 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 4911 if (!fields || !GvHV(*fields))
4912 break;
4913 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
4914 key = SvPV(*svp, keylen);
4915 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
4916 if (!indsvp) {
4917 croak("No such field \"%s\" in variable %s of type %s",
4918 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
4919 }
4920 ind = SvIV(*indsvp);
4921 if (ind < 1)
4922 croak("Bad index while coercing array into hash");
4923 rop->op_type = OP_RV2AV;
4924 rop->op_ppaddr = ppaddr[OP_RV2AV];
4925 o->op_type = OP_AELEM;
4926 o->op_ppaddr = ppaddr[OP_AELEM];
4927 SvREFCNT_dec(*svp);
4928 *svp = newSViv(ind);
4929 break;
4930 }
4931
79072805 4932 default:
c07a80fd 4933 o->op_seq = op_seqmax++;
79072805
LW		 4934 break;
4935 }
a0d0e21e 4936 oldop = o;
79072805 4937 }
a0d0e21e 4938 LEAVE;
79072805 4939}
Unnamed repository; edit this file 'description' to name the repository.