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tweak to get BSDI to build IPC/SysV
[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
76e3520e
GS		 21#ifdef PERL_OBJECT
22#define CHECKCALL this->*check
23#else
24#define CHECKCALL *check
25#endif
26
e50aee73 27/*
5dc0d613 28 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 29 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 30 */
11343788 31#define CHECKOP(type,o) \
28757baa 32 ((op_mask && op_mask[type]) \
5dc0d613 33 ? ( op_free((OP*)o), \
28757baa 34 croak("%s trapped by operation mask", op_desc[type]), \
35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
76e3520e
GS		 38static bool scalar_mod_type _((OP *o, I32 type));
39#ifndef PERL_OBJECT
11343788 40static I32 list_assignment _((OP *o));
3bc5dc61 41static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 42static OP *modkids _((OP *o, I32 type));
43static OP *no_fh_allowed _((OP *o));
44static OP *scalarboolean _((OP *o));
45static OP *too_few_arguments _((OP *o, char* name));
46static OP *too_many_arguments _((OP *o, char* name));
47static void null _((OP* o));
bbce6d69 48static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
748a9306 49 CV* startcv, I32 cx_ix));
54b9620d 50static OP *newDEFSVOP _((void));
883ffac3 51static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 52#endif
79072805 53
76e3520e 54STATIC char*
8ac85365 55gv_ename(GV *gv)
4633a7c4
LW		 56{
57 SV* tmpsv = sv_newmortal();
46fc3d4c 58 gv_efullname3(tmpsv, gv, Nullch);
4633a7c4
LW		 59 return SvPV(tmpsv,na);
60}
61
76e3520e 62STATIC OP *
8ac85365 63no_fh_allowed(OP *o)
79072805 64{
46fc3d4c 65 yyerror(form("Missing comma after first argument to %s function",
5196be3e 66 op_desc[o->op_type]));
11343788 67 return o;
79072805
LW		 68}
69
76e3520e 70STATIC OP *
8ac85365 71too_few_arguments(OP *o, char *name)
79072805 72{
46fc3d4c 73 yyerror(form("Not enough arguments for %s", name));
11343788 74 return o;
79072805
LW		 75}
76
76e3520e 77STATIC OP *
8ac85365 78too_many_arguments(OP *o, char *name)
79072805 79{
46fc3d4c 80 yyerror(form("Too many arguments for %s", name));
11343788 81 return o;
79072805
LW		 82}
83
76e3520e 84STATIC void
8ac85365 85bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 86{
46fc3d4c 87 yyerror(form("Type of arg %d to %s must be %s (not %s)",
88 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 89}
90
a0d0e21e 91void
8ac85365 92assertref(OP *o)
a0d0e21e 93{
11343788 94 int type = o->op_type;
a0d0e21e 95 if (type != OP_AELEM && type != OP_HELEM) {
46fc3d4c 96 yyerror(form("Can't use subscript on %s", op_desc[type]));
bde90e66 97 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 98 dTHR;
bde90e66
HS		 99 SV *msg = sv_2mortal(
100 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
101 type == OP_ENTERSUB ? '&' : '%'));
102 if (in_eval & 2)
103 warn("%_", msg);
104 else if (in_eval)
105 sv_catsv(GvSV(errgv), msg);
106 else
107 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
108 }
a0d0e21e
LW		 109 }
110}
111
79072805
LW		 112/* "register" allocation */
113
114PADOFFSET
8ac85365 115pad_allocmy(char *name)
93a17b20 116{
11343788 117 dTHR;
a0d0e21e
LW		 118 PADOFFSET off;
119 SV *sv;
120
121 if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) {
46fc3d4c 122 if (!isPRINT(name[1])) {
123 name[3] = '\0';
124 name[2] = toCTRL(name[1]);
125 name[1] = '^';
126 }
a0d0e21e
LW		 127 croak("Can't use global %s in \"my\"",name);
128 }
93965878 129 if (dowarn && AvFILLp(comppad_name) >= 0) {
b1cb66bf 130 SV **svp = AvARRAY(comppad_name);
93965878 131 for (off = AvFILLp(comppad_name); off > comppad_name_floor; off--) {
b1cb66bf 132 if ((sv = svp[off])
133 && sv != &sv_undef
134 && SvIVX(sv) == 999999999 /* var is in open scope */
135 && strEQ(name, SvPVX(sv)))
136 {
137 warn("\"my\" variable %s masks earlier declaration in same scope", name);
138 break;
139 }
140 }
141 }
a0d0e21e
LW		 142 off = pad_alloc(OP_PADSV, SVs_PADMY);
143 sv = NEWSV(1102,0);
93a17b20
LW		 144 sv_upgrade(sv, SVt_PVNV);
145 sv_setpv(sv, name);
c750a3ec
MB		 146 if (in_my_stash) {
147 if (*name != '$')
148 croak("Can't declare class for non-scalar %s in \"my\"",name);
149 SvOBJECT_on(sv);
150 (void)SvUPGRADE(sv, SVt_PVMG);
151 SvSTASH(sv) = (HV*)SvREFCNT_inc(in_my_stash);
152 sv_objcount++;
153 }
8990e307 154 av_store(comppad_name, off, sv);
748a9306 155 SvNVX(sv) = (double)999999999;
8990e307
LW		 156 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
157 if (!min_intro_pending)
158 min_intro_pending = off;
159 max_intro_pending = off;
93a17b20 160 if (*name == '@')
463ee0b2 161 av_store(comppad, off, (SV*)newAV());
93a17b20 162 else if (*name == '%')
463ee0b2 163 av_store(comppad, off, (SV*)newHV());
ed6116ce 164 SvPADMY_on(curpad[off]);
93a17b20
LW		 165 return off;
166}
167
76e3520e 168STATIC PADOFFSET
bbce6d69 169pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix)
93a17b20 170{
11343788 171 dTHR;
748a9306 172 CV *cv;
93a17b20
LW		 173 I32 off;
174 SV *sv;
93a17b20 175 register I32 i;
c09156bb 176 register PERL_CONTEXT *cx;
a0d0e21e 177 int saweval;
93a17b20 178
748a9306 179 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 180 AV *curlist = CvPADLIST(cv);
181 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 182 AV *curname;
4fdae800 183
748a9306 184 if (!svp || *svp == &sv_undef)
4633a7c4 185 continue;
748a9306
LW		 186 curname = (AV*)*svp;
187 svp = AvARRAY(curname);
93965878 188 for (off = AvFILLp(curname); off > 0; off--) {
748a9306
LW		 189 if ((sv = svp[off]) &&
190 sv != &sv_undef &&
191 seq <= SvIVX(sv) &&
13826f2c 192 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 193 strEQ(SvPVX(sv), name))
194 {
5f05dabc 195 I32 depth;
196 AV *oldpad;
197 SV *oldsv;
198
199 depth = CvDEPTH(cv);
200 if (!depth) {
9607fc9c 201 if (newoff) {
202 if (SvFAKE(sv))
203 continue;
4fdae800 204 return 0; /* don't clone from inactive stack frame */
9607fc9c 205 }
5f05dabc 206 depth = 1;
207 }
208 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
209 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 210 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 211 SV *namesv = NEWSV(1103,0);
748a9306 212 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 213 sv_upgrade(namesv, SVt_PVNV);
214 sv_setpv(namesv, name);
215 av_store(comppad_name, newoff, namesv);
216 SvNVX(namesv) = (double)curcop->cop_seq;
217 SvIVX(namesv) = 999999999; /* A ref, intro immediately */
218 SvFAKE_on(namesv); /* A ref, not a real var */
774d564b 219 if (CvANON(compcv) || SvTYPE(compcv) == SVt_PVFM) {
28757baa 220 /* "It's closures all the way down." */
221 CvCLONE_on(compcv);
54310121 222 if (cv == startcv) {
223 if (CvANON(compcv))
224 oldsv = Nullsv; /* no need to keep ref */
225 }
226 else {
28757baa 227 CV *bcv;
228 for (bcv = startcv;
229 bcv && bcv != cv && !CvCLONE(bcv);
230 bcv = CvOUTSIDE(bcv)) {
231 if (CvANON(bcv))
232 CvCLONE_on(bcv);
233 else {
774d564b 234 if (dowarn && !CvUNIQUE(cv))
44a8e56a 235 warn(
236 "Variable \"%s\" may be unavailable",
28757baa 237 name);
238 break;
239 }
240 }
241 }
242 }
44a8e56a 243 else if (!CvUNIQUE(compcv)) {
9607fc9c 244 if (dowarn && !SvFAKE(sv) && !CvUNIQUE(cv))
44a8e56a 245 warn("Variable \"%s\" will not stay shared", name);
5f05dabc 246 }
748a9306 247 }
199100c8 248 av_store(comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 249 return newoff;
250 }
93a17b20
LW		 251 }
252 }
253
254 /* Nothing in current lexical context--try eval's context, if any.
255 * This is necessary to let the perldb get at lexically scoped variables.
256 * XXX This will also probably interact badly with eval tree caching.
257 */
258
a0d0e21e 259 saweval = 0;
748a9306 260 for (i = cx_ix; i >= 0; i--) {
93a17b20
LW		 261 cx = &cxstack[i];
262 switch (cx->cx_type) {
263 default:
748a9306
LW		 264 if (i == 0 && saweval) {
265 seq = cxstack[saweval].blk_oldcop->cop_seq;
266 return pad_findlex(name, newoff, seq, main_cv, 0);
267 }
93a17b20
LW		 268 break;
269 case CXt_EVAL:
44a8e56a 270 switch (cx->blk_eval.old_op_type) {
271 case OP_ENTEREVAL:
272 saweval = i;
273 break;
274 case OP_REQUIRE:
275 /* require must have its own scope */
276 return 0;
277 }
93a17b20
LW		 278 break;
279 case CXt_SUB:
280 if (!saweval)
281 return 0;
282 cv = cx->blk_sub.cv;
748a9306
LW		 283 if (debstash && CvSTASH(cv) == debstash) { /* ignore DB'* scope */
284 saweval = i; /* so we know where we were called from */
93a17b20 285 continue;
93a17b20 286 }
748a9306
LW		 287 seq = cxstack[saweval].blk_oldcop->cop_seq;
288 return pad_findlex(name, newoff, seq, cv, i-1);
93a17b20
LW		 289 }
290 }
291
748a9306
LW		 292 return 0;
293}
a0d0e21e 294
748a9306 295PADOFFSET
8ac85365 296pad_findmy(char *name)
748a9306 297{
11343788 298 dTHR;
748a9306 299 I32 off;
54310121 300 I32 pendoff = 0;
748a9306
LW		 301 SV *sv;
302 SV **svp = AvARRAY(comppad_name);
bbce6d69 303 U32 seq = cop_seqmax;
748a9306 304
11343788
MB		 305#ifdef USE_THREADS
306 /*
307 * Special case to get lexical (and hence per-thread) @_.
308 * XXX I need to find out how to tell at parse-time whether use
309 * of @_ should refer to a lexical (from a sub) or defgv (global
310 * scope and maybe weird sub-ish things like formats). See
311 * startsub in perly.y. It's possible that @_ could be lexical
312 * (at least from subs) even in non-threaded perl.
313 */
314 if (strEQ(name, "@_"))
315 return 0; /* success. (NOT_IN_PAD indicates failure) */
316#endif /* USE_THREADS */
317
748a9306 318 /* The one we're looking for is probably just before comppad_name_fill. */
93965878 319 for (off = AvFILLp(comppad_name); off > 0; off--) {
a0d0e21e
LW		 320 if ((sv = svp[off]) &&
321 sv != &sv_undef &&
54310121 322 (!SvIVX(sv) ||
323 (seq <= SvIVX(sv) &&
324 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 325 strEQ(SvPVX(sv), name))
326 {
54310121 327 if (SvIVX(sv))
328 return (PADOFFSET)off;
329 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 330 }
331 }
748a9306
LW		 332
333 /* See if it's in a nested scope */
334 off = pad_findlex(name, 0, seq, CvOUTSIDE(compcv), cxstack_ix);
54310121 335 if (off) {
336 /* If there is a pending local definition, this new alias must die */
337 if (pendoff)
338 SvIVX(AvARRAY(comppad_name)[off]) = seq;
11343788 339 return off; /* pad_findlex returns 0 for failure...*/
54310121 340 }
11343788 341 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 342}
343
344void
8ac85365 345pad_leavemy(I32 fill)
93a17b20
LW		 346{
347 I32 off;
8990e307 348 SV **svp = AvARRAY(comppad_name);
93a17b20 349 SV *sv;
8990e307
LW		 350 if (min_intro_pending && fill < min_intro_pending) {
351 for (off = max_intro_pending; off >= min_intro_pending; off--) {
a0d0e21e 352 if ((sv = svp[off]) && sv != &sv_undef)
8990e307
LW		 353 warn("%s never introduced", SvPVX(sv));
354 }
355 }
356 /* "Deintroduce" my variables that are leaving with this scope. */
93965878 357 for (off = AvFILLp(comppad_name); off > fill; off--) {
748a9306 358 if ((sv = svp[off]) && sv != &sv_undef && SvIVX(sv) == 999999999)
463ee0b2 359 SvIVX(sv) = cop_seqmax;
93a17b20
LW		 360 }
361}
362
363PADOFFSET
8ac85365 364pad_alloc(I32 optype, U32 tmptype)
79072805 365{
11343788 366 dTHR;
79072805
LW		 367 SV *sv;
368 I32 retval;
369
370 if (AvARRAY(comppad) != curpad)
463ee0b2 371 croak("panic: pad_alloc");
a0d0e21e
LW		 372 if (pad_reset_pending)
373 pad_reset();
ed6116ce 374 if (tmptype & SVs_PADMY) {
79072805 375 do {
93965878 376 sv = *av_fetch(comppad, AvFILLp(comppad) + 1, TRUE);
ed6116ce 377 } while (SvPADBUSY(sv)); /* need a fresh one */
93965878 378 retval = AvFILLp(comppad);
79072805
LW		 379 }
380 else {
bbce6d69 381 SV **names = AvARRAY(comppad_name);
93965878 382 SSize_t names_fill = AvFILLp(comppad_name);
bbce6d69 383 for (;;) {
384 /*
385 * "foreach" index vars temporarily become aliases to non-"my"
386 * values. Thus we must skip, not just pad values that are
387 * marked as current pad values, but also those with names.
388 */
389 if (++padix <= names_fill &&
390 (sv = names[padix]) && sv != &sv_undef)
391 continue;
392 sv = *av_fetch(comppad, padix, TRUE);
393 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
394 break;
395 }
79072805
LW		 396 retval = padix;
397 }
8990e307 398 SvFLAGS(sv) |= tmptype;
79072805 399 curpad = AvARRAY(comppad);
11343788 400#ifdef USE_THREADS
5dc0d613
MB		 401 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
402 (unsigned long) thr, (unsigned long) curpad,
403 (long) retval, op_name[optype]));
11343788 404#else
d9bb4600
GS		 405 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
406 (unsigned long) curpad,
5dc0d613 407 (long) retval, op_name[optype]));
11343788 408#endif /* USE_THREADS */
79072805
LW		 409 return (PADOFFSET)retval;
410}
411
412SV *
8990e307 413pad_sv(PADOFFSET po)
79072805 414{
11343788
MB		 415 dTHR;
416#ifdef USE_THREADS
5dc0d613
MB		 417 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
418 (unsigned long) thr, (unsigned long) curpad, po));
11343788 419#else
79072805 420 if (!po)
463ee0b2 421 croak("panic: pad_sv po");
d9bb4600
GS		 422 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
423 (unsigned long) curpad, po));
11343788 424#endif /* USE_THREADS */
79072805
LW		 425 return curpad[po]; /* eventually we'll turn this into a macro */
426}
427
428void
8990e307 429pad_free(PADOFFSET po)
79072805 430{
11343788 431 dTHR;
a0d0e21e
LW		 432 if (!curpad)
433 return;
79072805 434 if (AvARRAY(comppad) != curpad)
463ee0b2 435 croak("panic: pad_free curpad");
79072805 436 if (!po)
463ee0b2 437 croak("panic: pad_free po");
11343788 438#ifdef USE_THREADS
5dc0d613
MB		 439 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
440 (unsigned long) thr, (unsigned long) curpad, po));
11343788 441#else
d9bb4600
GS		 442 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
443 (unsigned long) curpad, po));
11343788 444#endif /* USE_THREADS */
a0d0e21e 445 if (curpad[po] && curpad[po] != &sv_undef)
ed6116ce 446 SvPADTMP_off(curpad[po]);
a0d0e21e 447 if ((I32)po < padix)
79072805
LW		 448 padix = po - 1;
449}
450
451void
8990e307 452pad_swipe(PADOFFSET po)
79072805 453{
11343788 454 dTHR;
79072805 455 if (AvARRAY(comppad) != curpad)
463ee0b2 456 croak("panic: pad_swipe curpad");
79072805 457 if (!po)
463ee0b2 458 croak("panic: pad_swipe po");
11343788 459#ifdef USE_THREADS
5dc0d613
MB		 460 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
461 (unsigned long) thr, (unsigned long) curpad, po));
11343788 462#else
d9bb4600
GS		 463 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
464 (unsigned long) curpad, po));
11343788 465#endif /* USE_THREADS */
ed6116ce 466 SvPADTMP_off(curpad[po]);
a0d0e21e
LW		 467 curpad[po] = NEWSV(1107,0);
468 SvPADTMP_on(curpad[po]);
469 if ((I32)po < padix)
79072805
LW		 470 padix = po - 1;
471}
472
d9bb4600
GS		 473/* XXX pad_reset() is currently disabled because it results in serious bugs.
474 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
475 * on the stack by OPs that use them, there are several ways to get an alias
476 * to a shared TARG. Such an alias will change randomly and unpredictably.
477 * We avoid doing this until we can think of a Better Way.
478 * GSAR 97-10-29 */
79072805 479void
8ac85365 480pad_reset(void)
79072805 481{
d9bb4600 482#ifdef USE_BROKEN_PAD_RESET
11343788 483 dTHR;
79072805
LW		 484 register I32 po;
485
486 if (AvARRAY(comppad) != curpad)
463ee0b2 487 croak("panic: pad_reset curpad");
11343788 488#ifdef USE_THREADS
5dc0d613
MB		 489 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
490 (unsigned long) thr, (unsigned long) curpad));
11343788 491#else
d9bb4600
GS		 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
493 (unsigned long) curpad));
11343788 494#endif /* USE_THREADS */
748a9306
LW		 495 if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */
496 for (po = AvMAX(comppad); po > padix_floor; po--) {
ff0cee69 497 if (curpad[po] && !SvIMMORTAL(curpad[po]))
748a9306
LW		 498 SvPADTMP_off(curpad[po]);
499 }
500 padix = padix_floor;
79072805 501 }
d9bb4600 502#endif
a0d0e21e 503 pad_reset_pending = FALSE;
79072805
LW		 504}
505
a863c7d1 506#ifdef USE_THREADS
54b9620d 507/* find_threadsv is not reentrant */
a863c7d1 508PADOFFSET
54b9620d 509find_threadsv(char *name)
a863c7d1
MB		 510{
511 dTHR;
512 char *p;
513 PADOFFSET key;
554b3eca 514 SV **svp;
54b9620d
MB		 515 /* We currently only handle names of a single character */
516 p = strchr(threadsv_names, *name);
a863c7d1
MB		 517 if (!p)
518 return NOT_IN_PAD;
54b9620d
MB		 519 key = p - threadsv_names;
520 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 521 if (!svp) {
522 SV *sv = NEWSV(0, 0);
54b9620d 523 av_store(thr->threadsv, key, sv);
940cb80d 524 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 525 /*
526 * Some magic variables used to be automagically initialised
527 * in gv_fetchpv. Those which are now per-thread magicals get
528 * initialised here instead.
529 */
530 switch (*name) {
54b9620d
MB		 531 case '_':
532 break;
554b3eca
MB		 533 case ';':
534 sv_setpv(sv, "\034");
54b9620d 535 sv_magic(sv, 0, 0, name, 1);
554b3eca 536 break;
c277df42
IZ		 537 case '&':
538 case '`':
539 case '\'':
540 sawampersand = TRUE;
541 SvREADONLY_on(sv);
d8b5173a 542 /* FALL THROUGH */
067391ea
GS		 543
544 /* XXX %! tied to Errno.pm needs to be added here.
545 * See gv_fetchpv(). */
546 /* case '!': */
547
54b9620d
MB		 548 default:
549 sv_magic(sv, 0, 0, name, 1);
554b3eca 550 }
a863c7d1 551 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
54b9620d 552 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 553 sv, (*name < 32) ? "^" : "",
554 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 555 }
556 return key;
557}
558#endif /* USE_THREADS */
559
79072805
LW		 560/* Destructor */
561
562void
8ac85365 563op_free(OP *o)
79072805 564{
85e6fe83 565 register OP *kid, *nextkid;
79072805 566
5dc0d613 567 if (!o || o->op_seq == (U16)-1)
79072805
LW		 568 return;
569
11343788
MB		 570 if (o->op_flags & OPf_KIDS) {
571 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 572 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 573 op_free(kid);
85e6fe83 574 }
79072805
LW		 575 }
576
11343788 577 switch (o->op_type) {
8990e307 578 case OP_NULL:
11343788 579 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 580 break;
a0d0e21e 581 case OP_ENTEREVAL:
11343788 582 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 583 break;
554b3eca 584#ifdef USE_THREADS
2faa37cc 585 case OP_THREADSV:
54b9620d 586 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 587 break;
588#endif /* USE_THREADS */
a6006777 589 default:
ac4c12e7
GS		 590 if (!(o->op_flags & OPf_REF)
591 || (check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 592 break;
593 /* FALL THROUGH */
463ee0b2 594 case OP_GVSV:
79072805 595 case OP_GV:
a6006777 596 case OP_AELEMFAST:
11343788 597 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 598 break;
599 case OP_NEXTSTATE:
600 case OP_DBSTATE:
5196be3e 601 Safefree(cCOPo->cop_label);
11343788 602 SvREFCNT_dec(cCOPo->cop_filegv);
79072805
LW		 603 break;
604 case OP_CONST:
11343788 605 SvREFCNT_dec(cSVOPo->op_sv);
79072805 606 break;
748a9306
LW		 607 case OP_GOTO:
608 case OP_NEXT:
609 case OP_LAST:
610 case OP_REDO:
11343788 611 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 612 break;
613 /* FALL THROUGH */
a0d0e21e 614 case OP_TRANS:
11343788 615 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 616 break;
617 case OP_SUBST:
11343788 618 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 619 /* FALL THROUGH */
748a9306 620 case OP_PUSHRE:
a0d0e21e 621 case OP_MATCH:
c277df42 622 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 623 break;
79072805
LW		 624 }
625
11343788
MB		 626 if (o->op_targ > 0)
627 pad_free(o->op_targ);
8990e307 628
11343788 629 Safefree(o);
79072805
LW		 630}
631
76e3520e 632STATIC void
8ac85365 633null(OP *o)
8990e307 634{
54b9620d 635 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 636 pad_free(o->op_targ);
637 o->op_targ = o->op_type;
638 o->op_type = OP_NULL;
639 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 640}
641
79072805
LW		 642/* Contextualizers */
643
463ee0b2 644#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 645
646OP *
8ac85365 647linklist(OP *o)
79072805
LW		 648{
649 register OP *kid;
650
11343788
MB		 651 if (o->op_next)
652 return o->op_next;
79072805
LW		 653
654 /* establish postfix order */
11343788
MB		 655 if (cUNOPo->op_first) {
656 o->op_next = LINKLIST(cUNOPo->op_first);
657 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 658 if (kid->op_sibling)
659 kid->op_next = LINKLIST(kid->op_sibling);
660 else
11343788 661 kid->op_next = o;
79072805
LW		 662 }
663 }
664 else
11343788 665 o->op_next = o;
79072805 666
11343788 667 return o->op_next;
79072805
LW		 668}
669
670OP *
8ac85365 671scalarkids(OP *o)
79072805
LW		 672{
673 OP *kid;
11343788
MB		 674 if (o && o->op_flags & OPf_KIDS) {
675 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 676 scalar(kid);
677 }
11343788 678 return o;
79072805
LW		 679}
680
76e3520e 681STATIC OP *
8ac85365 682scalarboolean(OP *o)
8990e307
LW		 683{
684 if (dowarn &&
11343788 685 o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 686 dTHR;
a0d0e21e
LW		 687 line_t oldline = curcop->cop_line;
688
689 if (copline != NOLINE)
690 curcop->cop_line = copline;
691 warn("Found = in conditional, should be ==");
692 curcop->cop_line = oldline;
693 }
11343788 694 return scalar(o);
8990e307
LW		 695}
696
697OP *
8ac85365 698scalar(OP *o)
79072805
LW		 699{
700 OP *kid;
701
a0d0e21e 702 /* assumes no premature commitment */
5dc0d613
MB		 703 if (!o || (o->op_flags & OPf_WANT) || error_count
704 || o->op_type == OP_RETURN)
11343788 705 return o;
79072805 706
5dc0d613 707 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 708
11343788 709 switch (o->op_type) {
79072805 710 case OP_REPEAT:
11343788
MB		 711 if (o->op_private & OPpREPEAT_DOLIST)
712 null(((LISTOP*)cBINOPo->op_first)->op_first);
713 scalar(cBINOPo->op_first);
8990e307 714 break;
79072805
LW		 715 case OP_OR:
716 case OP_AND:
717 case OP_COND_EXPR:
11343788 718 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 719 scalar(kid);
79072805 720 break;
a0d0e21e 721 case OP_SPLIT:
11343788 722 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 723 if (!kPMOP->op_pmreplroot)
724 deprecate("implicit split to @_");
725 }
726 /* FALL THROUGH */
79072805
LW		 727 case OP_MATCH:
728 case OP_SUBST:
729 case OP_NULL:
8990e307 730 default:
11343788
MB		 731 if (o->op_flags & OPf_KIDS) {
732 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 733 scalar(kid);
734 }
79072805
LW		 735 break;
736 case OP_LEAVE:
737 case OP_LEAVETRY:
5dc0d613 738 kid = cLISTOPo->op_first;
54310121 739 scalar(kid);
740 while (kid = kid->op_sibling) {
741 if (kid->op_sibling)
742 scalarvoid(kid);
743 else
744 scalar(kid);
745 }
0f15f207 746 WITH_THR(curcop = &compiling);
54310121 747 break;
748a9306 748 case OP_SCOPE:
79072805 749 case OP_LINESEQ:
8990e307 750 case OP_LIST:
11343788 751 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 752 if (kid->op_sibling)
753 scalarvoid(kid);
754 else
755 scalar(kid);
756 }
0f15f207 757 WITH_THR(curcop = &compiling);
79072805
LW		 758 break;
759 }
11343788 760 return o;
79072805
LW		 761}
762
763OP *
8ac85365 764scalarvoid(OP *o)
79072805
LW		 765{
766 OP *kid;
8990e307
LW		 767 char* useless = 0;
768 SV* sv;
79072805 769
54310121 770 /* assumes no premature commitment */
5dc0d613
MB		 771 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count
772 || o->op_type == OP_RETURN)
11343788 773 return o;
79072805 774
5dc0d613 775 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 776
11343788 777 switch (o->op_type) {
79072805 778 default:
11343788 779 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 780 break;
36477c24 781 /* FALL THROUGH */
782 case OP_REPEAT:
11343788 783 if (o->op_flags & OPf_STACKED)
8990e307 784 break;
5d82c453
GA		 785 goto func_ops;
786 case OP_SUBSTR:
787 if (o->op_private == 4)
788 break;
8990e307
LW		 789 /* FALL THROUGH */
790 case OP_GVSV:
791 case OP_WANTARRAY:
792 case OP_GV:
793 case OP_PADSV:
794 case OP_PADAV:
795 case OP_PADHV:
796 case OP_PADANY:
797 case OP_AV2ARYLEN:
8990e307 798 case OP_REF:
a0d0e21e
LW		 799 case OP_REFGEN:
800 case OP_SREFGEN:
8990e307
LW		 801 case OP_DEFINED:
802 case OP_HEX:
803 case OP_OCT:
804 case OP_LENGTH:
8990e307
LW		 805 case OP_VEC:
806 case OP_INDEX:
807 case OP_RINDEX:
808 case OP_SPRINTF:
809 case OP_AELEM:
810 case OP_AELEMFAST:
811 case OP_ASLICE:
8990e307
LW		 812 case OP_HELEM:
813 case OP_HSLICE:
814 case OP_UNPACK:
815 case OP_PACK:
8990e307
LW		 816 case OP_JOIN:
817 case OP_LSLICE:
818 case OP_ANONLIST:
819 case OP_ANONHASH:
820 case OP_SORT:
821 case OP_REVERSE:
822 case OP_RANGE:
823 case OP_FLIP:
824 case OP_FLOP:
825 case OP_CALLER:
826 case OP_FILENO:
827 case OP_EOF:
828 case OP_TELL:
829 case OP_GETSOCKNAME:
830 case OP_GETPEERNAME:
831 case OP_READLINK:
832 case OP_TELLDIR:
833 case OP_GETPPID:
834 case OP_GETPGRP:
835 case OP_GETPRIORITY:
836 case OP_TIME:
837 case OP_TMS:
838 case OP_LOCALTIME:
839 case OP_GMTIME:
840 case OP_GHBYNAME:
841 case OP_GHBYADDR:
842 case OP_GHOSTENT:
843 case OP_GNBYNAME:
844 case OP_GNBYADDR:
845 case OP_GNETENT:
846 case OP_GPBYNAME:
847 case OP_GPBYNUMBER:
848 case OP_GPROTOENT:
849 case OP_GSBYNAME:
850 case OP_GSBYPORT:
851 case OP_GSERVENT:
852 case OP_GPWNAM:
853 case OP_GPWUID:
854 case OP_GGRNAM:
855 case OP_GGRGID:
856 case OP_GETLOGIN:
5d82c453 857 func_ops:
11343788
MB		 858 if (!(o->op_private & OPpLVAL_INTRO))
859 useless = op_desc[o->op_type];
8990e307
LW		 860 break;
861
862 case OP_RV2GV:
863 case OP_RV2SV:
864 case OP_RV2AV:
865 case OP_RV2HV:
11343788
MB		 866 if (!(o->op_private & OPpLVAL_INTRO) &&
867 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 868 useless = "a variable";
869 break;
79072805 870
93a17b20 871 case OP_NEXTSTATE:
8990e307 872 case OP_DBSTATE:
0f15f207 873 WITH_THR(curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 874 break;
875
79072805 876 case OP_CONST:
11343788 877 sv = cSVOPo->op_sv;
8990e307
LW		 878 if (dowarn) {
879 useless = "a constant";
880 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
881 useless = 0;
882 else if (SvPOK(sv)) {
883 if (strnEQ(SvPVX(sv), "di", 2) ||
a0d0e21e 884 strnEQ(SvPVX(sv), "ds", 2) ||
8990e307
LW		 885 strnEQ(SvPVX(sv), "ig", 2))
886 useless = 0;
887 }
888 }
11343788 889 null(o); /* don't execute a constant */
8990e307 890 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 891 break;
892
893 case OP_POSTINC:
11343788
MB		 894 o->op_type = OP_PREINC; /* pre-increment is faster */
895 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 896 break;
897
898 case OP_POSTDEC:
11343788
MB		 899 o->op_type = OP_PREDEC; /* pre-decrement is faster */
900 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 901 break;
902
79072805
LW		 903 case OP_OR:
904 case OP_AND:
905 case OP_COND_EXPR:
11343788 906 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 907 scalarvoid(kid);
908 break;
5aabfad6 909
a0d0e21e 910 case OP_NULL:
11343788 911 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
0f15f207 912 WITH_THR(curcop = ((COP*)o)); /* for warning below */
11343788 913 if (o->op_flags & OPf_STACKED)
a0d0e21e 914 break;
5aabfad6 915 /* FALL THROUGH */
79072805
LW		 916 case OP_ENTERTRY:
917 case OP_ENTER:
918 case OP_SCALAR:
11343788 919 if (!(o->op_flags & OPf_KIDS))
79072805 920 break;
54310121 921 /* FALL THROUGH */
463ee0b2 922 case OP_SCOPE:
79072805
LW		 923 case OP_LEAVE:
924 case OP_LEAVETRY:
a0d0e21e 925 case OP_LEAVELOOP:
79072805 926 case OP_LINESEQ:
79072805 927 case OP_LIST:
11343788 928 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 929 scalarvoid(kid);
930 break;
c90c0ff4 931 case OP_ENTEREVAL:
5196be3e 932 scalarkids(o);
c90c0ff4 933 break;
5aabfad6 934 case OP_REQUIRE:
c90c0ff4 935 /* all requires must return a boolean value */
5196be3e
MB		 936 o->op_flags &= ~OPf_WANT;
937 return scalar(o);
a0d0e21e 938 case OP_SPLIT:
11343788 939 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 940 if (!kPMOP->op_pmreplroot)
941 deprecate("implicit split to @_");
942 }
943 break;
79072805 944 }
8990e307
LW		 945 if (useless && dowarn)
946 warn("Useless use of %s in void context", useless);
11343788 947 return o;
79072805
LW		 948}
949
950OP *
8ac85365 951listkids(OP *o)
79072805
LW		 952{
953 OP *kid;
11343788
MB		 954 if (o && o->op_flags & OPf_KIDS) {
955 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 956 list(kid);
957 }
11343788 958 return o;
79072805
LW		 959}
960
961OP *
8ac85365 962list(OP *o)
79072805
LW		 963{
964 OP *kid;
965
a0d0e21e 966 /* assumes no premature commitment */
5dc0d613
MB		 967 if (!o || (o->op_flags & OPf_WANT) || error_count
968 || o->op_type == OP_RETURN)
11343788 969 return o;
79072805 970
5dc0d613 971 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 972
11343788 973 switch (o->op_type) {
79072805
LW		 974 case OP_FLOP:
975 case OP_REPEAT:
11343788 976 list(cBINOPo->op_first);
79072805
LW		 977 break;
978 case OP_OR:
979 case OP_AND:
980 case OP_COND_EXPR:
11343788 981 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 982 list(kid);
983 break;
984 default:
985 case OP_MATCH:
986 case OP_SUBST:
987 case OP_NULL:
11343788 988 if (!(o->op_flags & OPf_KIDS))
79072805 989 break;
11343788
MB		 990 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
991 list(cBINOPo->op_first);
992 return gen_constant_list(o);
79072805
LW		 993 }
994 case OP_LIST:
11343788 995 listkids(o);
79072805
LW		 996 break;
997 case OP_LEAVE:
998 case OP_LEAVETRY:
5dc0d613 999 kid = cLISTOPo->op_first;
54310121 1000 list(kid);
1001 while (kid = kid->op_sibling) {
1002 if (kid->op_sibling)
1003 scalarvoid(kid);
1004 else
1005 list(kid);
1006 }
0f15f207 1007 WITH_THR(curcop = &compiling);
54310121 1008 break;
748a9306 1009 case OP_SCOPE:
79072805 1010 case OP_LINESEQ:
11343788 1011 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1012 if (kid->op_sibling)
1013 scalarvoid(kid);
1014 else
1015 list(kid);
1016 }
0f15f207 1017 WITH_THR(curcop = &compiling);
79072805 1018 break;
c90c0ff4 1019 case OP_REQUIRE:
1020 /* all requires must return a boolean value */
5196be3e
MB		 1021 o->op_flags &= ~OPf_WANT;
1022 return scalar(o);
79072805 1023 }
11343788 1024 return o;
79072805
LW		 1025}
1026
1027OP *
8ac85365 1028scalarseq(OP *o)
79072805
LW		 1029{
1030 OP *kid;
1031
11343788
MB		 1032 if (o) {
1033 if (o->op_type == OP_LINESEQ ||
1034 o->op_type == OP_SCOPE ||
1035 o->op_type == OP_LEAVE ||
1036 o->op_type == OP_LEAVETRY)
463ee0b2 1037 {
0f15f207 1038 dTHR;
11343788 1039 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1040 if (kid->op_sibling) {
463ee0b2 1041 scalarvoid(kid);
ed6116ce 1042 }
463ee0b2
LW		 1043 }
1044 curcop = &compiling;
79072805 1045 }
11343788 1046 o->op_flags &= ~OPf_PARENS;
85e6fe83 1047 if (hints & HINT_BLOCK_SCOPE)
11343788 1048 o->op_flags |= OPf_PARENS;
79072805 1049 }
8990e307 1050 else
11343788
MB		 1051 o = newOP(OP_STUB, 0);
1052 return o;
79072805
LW		 1053}
1054
76e3520e 1055STATIC OP *
8ac85365 1056modkids(OP *o, I32 type)
79072805
LW		 1057{
1058 OP *kid;
11343788
MB		 1059 if (o && o->op_flags & OPf_KIDS) {
1060 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1061 mod(kid, type);
79072805 1062 }
11343788 1063 return o;
79072805
LW		 1064}
1065
79072805 1066OP *
8ac85365 1067mod(OP *o, I32 type)
79072805 1068{
11343788 1069 dTHR;
79072805
LW		 1070 OP *kid;
1071 SV *sv;
1072
11343788
MB		 1073 if (!o || error_count)
1074 return o;
79072805 1075
11343788 1076 switch (o->op_type) {
68dc0745 1077 case OP_UNDEF:
3e3baf6d 1078 modcount++;
5dc0d613 1079 return o;
a0d0e21e 1080 case OP_CONST:
11343788 1081 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1082 goto nomod;
1083 if (eval_start && eval_start->op_type == OP_CONST) {
1084 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1085 eval_start = 0;
1086 }
1087 else if (!type) {
1088 SAVEI32(compiling.cop_arybase);
748a9306 1089 compiling.cop_arybase = 0;
a0d0e21e
LW		 1090 }
1091 else if (type == OP_REFGEN)
1092 goto nomod;
1093 else
1094 croak("That use of $[ is unsupported");
1095 break;
5f05dabc 1096 case OP_STUB:
5196be3e 1097 if (o->op_flags & OPf_PARENS)
5f05dabc 1098 break;
1099 goto nomod;
a0d0e21e
LW		 1100 case OP_ENTERSUB:
1101 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1102 !(o->op_flags & OPf_STACKED)) {
1103 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1104 o->op_ppaddr = ppaddr[OP_RV2CV];
1105 assert(cUNOPo->op_first->op_type == OP_NULL);
1106 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1107 break;
1108 }
1109 /* FALL THROUGH */
1110 default:
a0d0e21e
LW		 1111 nomod:
1112 /* grep, foreach, subcalls, refgen */
1113 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1114 break;
46fc3d4c 1115 yyerror(form("Can't modify %s in %s",
5dc0d613 1116 op_desc[o->op_type],
46fc3d4c 1117 type ? op_desc[type] : "local"));
11343788 1118 return o;
79072805 1119
a0d0e21e
LW		 1120 case OP_PREINC:
1121 case OP_PREDEC:
1122 case OP_POW:
1123 case OP_MULTIPLY:
1124 case OP_DIVIDE:
1125 case OP_MODULO:
1126 case OP_REPEAT:
1127 case OP_ADD:
1128 case OP_SUBTRACT:
1129 case OP_CONCAT:
1130 case OP_LEFT_SHIFT:
1131 case OP_RIGHT_SHIFT:
1132 case OP_BIT_AND:
1133 case OP_BIT_XOR:
1134 case OP_BIT_OR:
1135 case OP_I_MULTIPLY:
1136 case OP_I_DIVIDE:
1137 case OP_I_MODULO:
1138 case OP_I_ADD:
1139 case OP_I_SUBTRACT:
11343788 1140 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1141 goto nomod;
1142 modcount++;
1143 break;
1144
79072805 1145 case OP_COND_EXPR:
11343788 1146 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1147 mod(kid, type);
79072805
LW		 1148 break;
1149
1150 case OP_RV2AV:
1151 case OP_RV2HV:
93af7a87 1152 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1153 croak("Can't localize through a reference");
11343788 1154 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1155 modcount = 10000;
11343788 1156 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1157 }
1158 /* FALL THROUGH */
79072805 1159 case OP_RV2GV:
5dc0d613 1160 if (scalar_mod_type(o, type))
3fe9a6f1 1161 goto nomod;
11343788 1162 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1163 /* FALL THROUGH */
1164 case OP_AASSIGN:
1165 case OP_ASLICE:
1166 case OP_HSLICE:
93a17b20
LW		 1167 case OP_NEXTSTATE:
1168 case OP_DBSTATE:
a0d0e21e
LW		 1169 case OP_REFGEN:
1170 case OP_CHOMP:
463ee0b2 1171 modcount = 10000;
79072805 1172 break;
463ee0b2 1173 case OP_RV2SV:
11343788 1174 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1175 croak("Can't localize through a reference");
aeea060c 1176 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1177 /* FALL THROUGH */
79072805 1178 case OP_GV:
463ee0b2 1179 case OP_AV2ARYLEN:
85aff577 1180 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1181 case OP_SASSIGN:
8990e307
LW		 1182 case OP_AELEMFAST:
1183 modcount++;
1184 break;
1185
748a9306
LW		 1186 case OP_PADAV:
1187 case OP_PADHV:
1188 modcount = 10000;
5196be3e
MB		 1189 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1190 return o; /* Treat \(@foo) like ordinary list. */
1191 if (scalar_mod_type(o, type))
3fe9a6f1 1192 goto nomod;
748a9306
LW		 1193 /* FALL THROUGH */
1194 case OP_PADSV:
1195 modcount++;
1196 if (!type)
1197 croak("Can't localize lexical variable %s",
11343788 1198 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1199 break;
1200
554b3eca 1201#ifdef USE_THREADS
2faa37cc 1202 case OP_THREADSV:
554b3eca 1203 modcount++; /* XXX ??? */
554b3eca
MB		 1204 break;
1205#endif /* USE_THREADS */
1206
748a9306
LW		 1207 case OP_PUSHMARK:
1208 break;
a0d0e21e 1209
69969c6f
SB		 1210 case OP_KEYS:
1211 if (type != OP_SASSIGN)
1212 goto nomod;
5d82c453
GA		 1213 goto lvalue_func;
1214 case OP_SUBSTR:
1215 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1216 goto nomod;
5f05dabc 1217 /* FALL THROUGH */
a0d0e21e 1218 case OP_POS:
463ee0b2 1219 case OP_VEC:
5d82c453 1220 lvalue_func:
11343788
MB		 1221 pad_free(o->op_targ);
1222 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1223 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1224 if (o->op_flags & OPf_KIDS)
1225 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1226 break;
a0d0e21e 1227
463ee0b2
LW		 1228 case OP_AELEM:
1229 case OP_HELEM:
11343788 1230 ref(cBINOPo->op_first, o->op_type);
68dc0745 1231 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1232 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1233 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1234 modcount++;
463ee0b2
LW		 1235 break;
1236
1237 case OP_SCOPE:
1238 case OP_LEAVE:
1239 case OP_ENTER:
11343788
MB		 1240 if (o->op_flags & OPf_KIDS)
1241 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1242 break;
1243
1244 case OP_NULL:
11343788 1245 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1246 break;
11343788
MB		 1247 if (o->op_targ != OP_LIST) {
1248 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1249 break;
1250 }
1251 /* FALL THROUGH */
463ee0b2 1252 case OP_LIST:
11343788 1253 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1254 mod(kid, type);
1255 break;
1256 }
11343788 1257 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1258
1259 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1260 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1261 else if (!type) {
11343788
MB		 1262 o->op_private |= OPpLVAL_INTRO;
1263 o->op_flags &= ~OPf_SPECIAL;
ca48fea7 1264 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1265 }
a0d0e21e 1266 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1267 o->op_flags |= OPf_REF;
1268 return o;
463ee0b2
LW		 1269}
1270
3fe9a6f1 1271static bool
8ac85365 1272scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1273{
1274 switch (type) {
1275 case OP_SASSIGN:
5196be3e 1276 if (o->op_type == OP_RV2GV)
3fe9a6f1 1277 return FALSE;
1278 /* FALL THROUGH */
1279 case OP_PREINC:
1280 case OP_PREDEC:
1281 case OP_POSTINC:
1282 case OP_POSTDEC:
1283 case OP_I_PREINC:
1284 case OP_I_PREDEC:
1285 case OP_I_POSTINC:
1286 case OP_I_POSTDEC:
1287 case OP_POW:
1288 case OP_MULTIPLY:
1289 case OP_DIVIDE:
1290 case OP_MODULO:
1291 case OP_REPEAT:
1292 case OP_ADD:
1293 case OP_SUBTRACT:
1294 case OP_I_MULTIPLY:
1295 case OP_I_DIVIDE:
1296 case OP_I_MODULO:
1297 case OP_I_ADD:
1298 case OP_I_SUBTRACT:
1299 case OP_LEFT_SHIFT:
1300 case OP_RIGHT_SHIFT:
1301 case OP_BIT_AND:
1302 case OP_BIT_XOR:
1303 case OP_BIT_OR:
1304 case OP_CONCAT:
1305 case OP_SUBST:
1306 case OP_TRANS:
49e9fbe6
GS		 1307 case OP_READ:
1308 case OP_SYSREAD:
1309 case OP_RECV:
3fe9a6f1 1310 case OP_ANDASSIGN: /* may work later */
1311 case OP_ORASSIGN: /* may work later */
1312 return TRUE;
1313 default:
1314 return FALSE;
1315 }
1316}
1317
463ee0b2 1318OP *
8ac85365 1319refkids(OP *o, I32 type)
463ee0b2
LW		 1320{
1321 OP *kid;
11343788
MB		 1322 if (o && o->op_flags & OPf_KIDS) {
1323 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1324 ref(kid, type);
1325 }
11343788 1326 return o;
463ee0b2
LW		 1327}
1328
1329OP *
8ac85365 1330ref(OP *o, I32 type)
463ee0b2
LW		 1331{
1332 OP *kid;
463ee0b2 1333
11343788
MB		 1334 if (!o || error_count)
1335 return o;
463ee0b2 1336
11343788 1337 switch (o->op_type) {
a0d0e21e 1338 case OP_ENTERSUB:
e55aaa0e 1339 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1340 !(o->op_flags & OPf_STACKED)) {
1341 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1342 o->op_ppaddr = ppaddr[OP_RV2CV];
1343 assert(cUNOPo->op_first->op_type == OP_NULL);
1344 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1345 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1346 }
1347 break;
aeea060c 1348
463ee0b2 1349 case OP_COND_EXPR:
11343788 1350 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1351 ref(kid, type);
1352 break;
8990e307 1353 case OP_RV2SV:
11343788 1354 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1355 /* FALL THROUGH */
1356 case OP_PADSV:
5f05dabc 1357 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1358 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1359 : type == OP_RV2HV ? OPpDEREF_HV
1360 : OPpDEREF_SV);
11343788 1361 o->op_flags |= OPf_MOD;
a0d0e21e 1362 }
8990e307
LW		 1363 break;
1364
2faa37cc 1365 case OP_THREADSV:
a863c7d1
MB		 1366 o->op_flags |= OPf_MOD; /* XXX ??? */
1367 break;
1368
463ee0b2
LW		 1369 case OP_RV2AV:
1370 case OP_RV2HV:
aeea060c 1371 o->op_flags |= OPf_REF;
8990e307 1372 /* FALL THROUGH */
463ee0b2 1373 case OP_RV2GV:
11343788 1374 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1375 break;
8990e307 1376
463ee0b2
LW		 1377 case OP_PADAV:
1378 case OP_PADHV:
aeea060c 1379 o->op_flags |= OPf_REF;
79072805 1380 break;
aeea060c 1381
8990e307 1382 case OP_SCALAR:
79072805 1383 case OP_NULL:
11343788 1384 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1385 break;
11343788 1386 ref(cBINOPo->op_first, type);
79072805
LW		 1387 break;
1388 case OP_AELEM:
1389 case OP_HELEM:
11343788 1390 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1391 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1392 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1393 : type == OP_RV2HV ? OPpDEREF_HV
1394 : OPpDEREF_SV);
11343788 1395 o->op_flags |= OPf_MOD;
8990e307 1396 }
79072805
LW		 1397 break;
1398
463ee0b2 1399 case OP_SCOPE:
79072805
LW		 1400 case OP_LEAVE:
1401 case OP_ENTER:
8990e307 1402 case OP_LIST:
11343788 1403 if (!(o->op_flags & OPf_KIDS))
79072805 1404 break;
11343788 1405 ref(cLISTOPo->op_last, type);
79072805 1406 break;
a0d0e21e
LW		 1407 default:
1408 break;
79072805 1409 }
11343788 1410 return scalar(o);
8990e307 1411
79072805
LW		 1412}
1413
1414OP *
8ac85365 1415my(OP *o)
93a17b20
LW		 1416{
1417 OP *kid;
93a17b20
LW		 1418 I32 type;
1419
11343788
MB		 1420 if (!o || error_count)
1421 return o;
93a17b20 1422
11343788 1423 type = o->op_type;
93a17b20 1424 if (type == OP_LIST) {
11343788 1425 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1426 my(kid);
dab48698 1427 } else if (type == OP_UNDEF) {
7766148a 1428 return o;
dab48698 1429 } else if (type != OP_PADSV &&
93a17b20
LW		 1430 type != OP_PADAV &&
1431 type != OP_PADHV &&
1432 type != OP_PUSHMARK)
1433 {
5dc0d613 1434 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1435 return o;
93a17b20 1436 }
11343788
MB		 1437 o->op_flags |= OPf_MOD;
1438 o->op_private |= OPpLVAL_INTRO;
1439 return o;
93a17b20
LW		 1440}
1441
1442OP *
8ac85365 1443sawparens(OP *o)
79072805
LW		 1444{
1445 if (o)
1446 o->op_flags |= OPf_PARENS;
1447 return o;
1448}
1449
1450OP *
8ac85365 1451bind_match(I32 type, OP *left, OP *right)
79072805 1452{
11343788 1453 OP *o;
79072805 1454
2ae324a7 1455 if (dowarn &&
1456 (left->op_type == OP_RV2AV ||
1457 left->op_type == OP_RV2HV ||
1458 left->op_type == OP_PADAV ||
1459 left->op_type == OP_PADHV)) {
1460 char *desc = op_desc[(right->op_type == OP_SUBST ||
1461 right->op_type == OP_TRANS)
1462 ? right->op_type : OP_MATCH];
1463 char *sample = ((left->op_type == OP_RV2AV ||
1464 left->op_type == OP_PADAV)
1465 ? "@array" : "%hash");
1466 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1467 }
1468
79072805
LW		 1469 if (right->op_type == OP_MATCH ||
1470 right->op_type == OP_SUBST ||
1471 right->op_type == OP_TRANS) {
1472 right->op_flags |= OPf_STACKED;
1473 if (right->op_type != OP_MATCH)
463ee0b2 1474 left = mod(left, right->op_type);
79072805 1475 if (right->op_type == OP_TRANS)
11343788 1476 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1477 else
11343788 1478 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1479 if (type == OP_NOT)
11343788
MB		 1480 return newUNOP(OP_NOT, 0, scalar(o));
1481 return o;
79072805
LW		 1482 }
1483 else
1484 return bind_match(type, left,
1485 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1486}
1487
1488OP *
8ac85365 1489invert(OP *o)
79072805 1490{
11343788
MB		 1491 if (!o)
1492 return o;
79072805 1493 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1494 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1495}
1496
1497OP *
8ac85365 1498scope(OP *o)
79072805
LW		 1499{
1500 if (o) {
84902520 1501 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1502 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1503 o->op_type = OP_LEAVE;
1504 o->op_ppaddr = ppaddr[OP_LEAVE];
1505 }
1506 else {
1507 if (o->op_type == OP_LINESEQ) {
1508 OP *kid;
1509 o->op_type = OP_SCOPE;
1510 o->op_ppaddr = ppaddr[OP_SCOPE];
1511 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1512 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1513 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1514 null(kid);
748a9306 1515 }
463ee0b2
LW		 1516 }
1517 else
748a9306 1518 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1519 }
79072805
LW		 1520 }
1521 return o;
1522}
1523
b3ac6de7
IZ		 1524void
1525save_hints(void)
1526{
1527 SAVEI32(hints);
1528 SAVESPTR(GvHV(hintgv));
1529 GvHV(hintgv) = newHVhv(GvHV(hintgv));
1530 SAVEFREESV(GvHV(hintgv));
1531}
1532
a0d0e21e 1533int
8ac85365 1534block_start(int full)
79072805 1535{
11343788 1536 dTHR;
a0d0e21e 1537 int retval = savestack_ix;
b3ac6de7 1538
55497cff 1539 SAVEI32(comppad_name_floor);
1540 if (full) {
93965878 1541 if ((comppad_name_fill = AvFILLp(comppad_name)) > 0)
55497cff 1542 comppad_name_floor = comppad_name_fill;
1543 else
1544 comppad_name_floor = 0;
1545 }
1546 SAVEI32(min_intro_pending);
1547 SAVEI32(max_intro_pending);
a0d0e21e 1548 min_intro_pending = 0;
55497cff 1549 SAVEI32(comppad_name_fill);
1550 SAVEI32(padix_floor);
a0d0e21e
LW		 1551 padix_floor = padix;
1552 pad_reset_pending = FALSE;
b3ac6de7 1553 SAVEHINTS();
a0d0e21e
LW		 1554 hints &= ~HINT_BLOCK_SCOPE;
1555 return retval;
1556}
1557
1558OP*
8ac85365 1559block_end(I32 floor, OP *seq)
a0d0e21e 1560{
11343788 1561 dTHR;
a0d0e21e
LW		 1562 int needblockscope = hints & HINT_BLOCK_SCOPE;
1563 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1564 LEAVE_SCOPE(floor);
1565 pad_reset_pending = FALSE;
1566 if (needblockscope)
1567 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1568 pad_leavemy(comppad_name_fill);
bbce6d69 1569 cop_seqmax++;
a0d0e21e
LW		 1570 return retval;
1571}
1572
76e3520e 1573STATIC OP *
54b9620d
MB		 1574newDEFSVOP(void)
1575{
1576#ifdef USE_THREADS
1577 OP *o = newOP(OP_THREADSV, 0);
1578 o->op_targ = find_threadsv("_");
1579 return o;
1580#else
1581 return newSVREF(newGVOP(OP_GV, 0, defgv));
1582#endif /* USE_THREADS */
1583}
1584
a0d0e21e 1585void
8ac85365 1586newPROG(OP *o)
a0d0e21e 1587{
11343788 1588 dTHR;
a0d0e21e 1589 if (in_eval) {
5dc0d613 1590 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1591 eval_start = linklist(eval_root);
1592 eval_root->op_next = 0;
1593 peep(eval_start);
1594 }
1595 else {
5dc0d613 1596 if (!o)
a0d0e21e 1597 return;
11343788 1598 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1599 curcop = &compiling;
1600 main_start = LINKLIST(main_root);
1601 main_root->op_next = 0;
1602 peep(main_start);
748a9306 1603 compcv = 0;
3841441e 1604
4fdae800 1605 /* Register with debugger */
84902520 1606 if (PERLDB_INTER) {
3841441e 1607 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1608 if (cv) {
1609 dSP;
924508f0 1610 PUSHMARK(SP);
3841441e
CS		 1611 XPUSHs((SV*)compiling.cop_filegv);
1612 PUTBACK;
1613 perl_call_sv((SV*)cv, G_DISCARD);
1614 }
1615 }
79072805 1616 }
79072805
LW		 1617}
1618
1619OP *
8ac85365 1620localize(OP *o, I32 lex)
79072805
LW		 1621{
1622 if (o->op_flags & OPf_PARENS)
1623 list(o);
8990e307 1624 else {
8990e307
LW		 1625 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1626 char *s;
1627 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1628 if (*s == ';' || *s == '=')
8990e307
LW		 1629 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1630 }
1631 }
93a17b20 1632 in_my = FALSE;
c750a3ec 1633 in_my_stash = Nullhv;
93a17b20
LW		 1634 if (lex)
1635 return my(o);
1636 else
463ee0b2 1637 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1638}
1639
1640OP *
8ac85365 1641jmaybe(OP *o)
79072805
LW		 1642{
1643 if (o->op_type == OP_LIST) {
554b3eca
MB		 1644 OP *o2;
1645#ifdef USE_THREADS
2faa37cc 1646 o2 = newOP(OP_THREADSV, 0);
54b9620d 1647 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1648#else
1649 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1650#endif /* USE_THREADS */
1651 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1652 }
1653 return o;
1654}
1655
1656OP *
8ac85365 1657fold_constants(register OP *o)
79072805 1658{
11343788 1659 dTHR;
79072805
LW		 1660 register OP *curop;
1661 I32 type = o->op_type;
748a9306 1662 SV *sv;
79072805
LW		 1663
1664 if (opargs[type] & OA_RETSCALAR)
1665 scalar(o);
1666 if (opargs[type] & OA_TARGET)
ed6116ce 1667 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1668
85e6fe83 1669 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1670 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1671
79072805
LW		 1672 if (!(opargs[type] & OA_FOLDCONST))
1673 goto nope;
1674
de939608
CS		 1675 switch (type) {
1676 case OP_SPRINTF:
1677 case OP_UCFIRST:
1678 case OP_LCFIRST:
1679 case OP_UC:
1680 case OP_LC:
69dcf70c
MB		 1681 case OP_SLT:
1682 case OP_SGT:
1683 case OP_SLE:
1684 case OP_SGE:
1685 case OP_SCMP:
1686
de939608
CS		 1687 if (o->op_private & OPpLOCALE)
1688 goto nope;
1689 }
1690
a0d0e21e
LW		 1691 if (error_count)
1692 goto nope; /* Don't try to run w/ errors */
1693
79072805 1694 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1695 if (curop->op_type != OP_CONST &&
1696 curop->op_type != OP_LIST &&
1697 curop->op_type != OP_SCALAR &&
a0d0e21e 1698 curop->op_type != OP_NULL &&
93a17b20 1699 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1700 goto nope;
1701 }
1702 }
1703
1704 curop = LINKLIST(o);
1705 o->op_next = 0;
1706 op = curop;
76e3520e 1707 CALLRUNOPS();
748a9306
LW		 1708 sv = *(stack_sp--);
1709 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1710 pad_swipe(o->op_targ);
748a9306
LW		 1711 else if (SvTEMP(sv)) { /* grab mortal temp? */
1712 (void)SvREFCNT_inc(sv);
1713 SvTEMP_off(sv);
85e6fe83 1714 }
79072805
LW		 1715 op_free(o);
1716 if (type == OP_RV2GV)
b1cb66bf 1717 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1718 else {
ee580363
GS		 1719 /* try to smush double to int, but don't smush -2.0 to -2 */
1720 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1721 type != OP_NEGATE)
1722 {
748a9306 1723 IV iv = SvIV(sv);
ee580363 1724 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1725 SvREFCNT_dec(sv);
1726 sv = newSViv(iv);
1727 }
b1cb66bf 1728 else
1729 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1730 }
1731 return newSVOP(OP_CONST, 0, sv);
1732 }
aeea060c 1733
79072805
LW		 1734 nope:
1735 if (!(opargs[type] & OA_OTHERINT))
1736 return o;
79072805 1737
85e6fe83 1738 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1739 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1740 return o;
1741
1742 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1743 if (curop->op_type == OP_CONST) {
b1cb66bf 1744 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1745 continue;
1746 return o;
1747 }
1748 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1749 continue;
1750 return o;
1751 }
a0d0e21e 1752 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1753 }
1754
79072805
LW		 1755 return o;
1756}
1757
1758OP *
8ac85365 1759gen_constant_list(register OP *o)
79072805 1760{
11343788 1761 dTHR;
79072805 1762 register OP *curop;
79072805 1763 I32 oldtmps_floor = tmps_floor;
79072805 1764
a0d0e21e
LW		 1765 list(o);
1766 if (error_count)
1767 return o; /* Don't attempt to run with errors */
1768
1769 op = curop = LINKLIST(o);
1770 o->op_next = 0;
11343788 1771 pp_pushmark(ARGS);
76e3520e 1772 CALLRUNOPS();
a0d0e21e 1773 op = curop;
11343788 1774 pp_anonlist(ARGS);
79072805 1775 tmps_floor = oldtmps_floor;
79072805
LW		 1776
1777 o->op_type = OP_RV2AV;
1778 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1779 curop = ((UNOP*)o)->op_first;
a0d0e21e 1780 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1781 op_free(curop);
79072805
LW		 1782 linklist(o);
1783 return list(o);
1784}
1785
1786OP *
8ac85365 1787convert(I32 type, I32 flags, OP *o)
79072805
LW		 1788{
1789 OP *kid;
a0d0e21e 1790 OP *last = 0;
79072805 1791
11343788
MB		 1792 if (!o || o->op_type != OP_LIST)
1793 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1794 else
5dc0d613 1795 o->op_flags &= ~OPf_WANT;
79072805 1796
8990e307 1797 if (!(opargs[type] & OA_MARK))
11343788 1798 null(cLISTOPo->op_first);
8990e307 1799
11343788
MB		 1800 o->op_type = type;
1801 o->op_ppaddr = ppaddr[type];
1802 o->op_flags |= flags;
79072805 1803
11343788
MB		 1804 o = CHECKOP(type, o);
1805 if (o->op_type != type)
1806 return o;
79072805 1807
11343788 1808 if (cLISTOPo->op_children < 7) {
79072805 1809 /* XXX do we really need to do this if we're done appending?? */
11343788 1810 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1811 last = kid;
11343788 1812 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1813 }
1814
11343788 1815 return fold_constants(o);
79072805
LW		 1816}
1817
1818/* List constructors */
1819
1820OP *
8ac85365 1821append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1822{
1823 if (!first)
1824 return last;
8990e307
LW		 1825
1826 if (!last)
79072805 1827 return first;
8990e307 1828
a0d0e21e
LW		 1829 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1830 return newLISTOP(type, 0, first, last);
79072805 1831
a0d0e21e
LW		 1832 if (first->op_flags & OPf_KIDS)
1833 ((LISTOP*)first)->op_last->op_sibling = last;
1834 else {
1835 first->op_flags |= OPf_KIDS;
1836 ((LISTOP*)first)->op_first = last;
1837 }
1838 ((LISTOP*)first)->op_last = last;
1839 ((LISTOP*)first)->op_children++;
1840 return first;
79072805
LW		 1841}
1842
1843OP *
8ac85365 1844append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1845{
1846 if (!first)
1847 return (OP*)last;
8990e307
LW		 1848
1849 if (!last)
79072805 1850 return (OP*)first;
8990e307
LW		 1851
1852 if (first->op_type != type)
79072805 1853 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1854
1855 if (last->op_type != type)
79072805
LW		 1856 return append_elem(type, (OP*)first, (OP*)last);
1857
1858 first->op_last->op_sibling = last->op_first;
1859 first->op_last = last->op_last;
1860 first->op_children += last->op_children;
1861 if (first->op_children)
1862 last->op_flags |= OPf_KIDS;
1863
1864 Safefree(last);
1865 return (OP*)first;
1866}
1867
1868OP *
8ac85365 1869prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1870{
1871 if (!first)
1872 return last;
8990e307
LW		 1873
1874 if (!last)
79072805 1875 return first;
8990e307
LW		 1876
1877 if (last->op_type == type) {
1878 if (type == OP_LIST) { /* already a PUSHMARK there */
1879 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1880 ((LISTOP*)last)->op_first->op_sibling = first;
1881 }
1882 else {
1883 if (!(last->op_flags & OPf_KIDS)) {
1884 ((LISTOP*)last)->op_last = first;
1885 last->op_flags |= OPf_KIDS;
1886 }
1887 first->op_sibling = ((LISTOP*)last)->op_first;
1888 ((LISTOP*)last)->op_first = first;
79072805 1889 }
79072805
LW		 1890 ((LISTOP*)last)->op_children++;
1891 return last;
1892 }
1893
1894 return newLISTOP(type, 0, first, last);
1895}
1896
1897/* Constructors */
1898
1899OP *
8ac85365 1900newNULLLIST(void)
79072805 1901{
8990e307
LW		 1902 return newOP(OP_STUB, 0);
1903}
1904
1905OP *
8ac85365 1906force_list(OP *o)
8990e307 1907{
11343788
MB		 1908 if (!o || o->op_type != OP_LIST)
1909 o = newLISTOP(OP_LIST, 0, o, Nullop);
1910 null(o);
1911 return o;
79072805
LW		 1912}
1913
1914OP *
8ac85365 1915newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1916{
1917 LISTOP *listop;
1918
1919 Newz(1101, listop, 1, LISTOP);
1920
1921 listop->op_type = type;
1922 listop->op_ppaddr = ppaddr[type];
1923 listop->op_children = (first != 0) + (last != 0);
1924 listop->op_flags = flags;
79072805
LW		 1925
1926 if (!last && first)
1927 last = first;
1928 else if (!first && last)
1929 first = last;
8990e307
LW		 1930 else if (first)
1931 first->op_sibling = last;
79072805
LW		 1932 listop->op_first = first;
1933 listop->op_last = last;
8990e307
LW		 1934 if (type == OP_LIST) {
1935 OP* pushop;
1936 pushop = newOP(OP_PUSHMARK, 0);
1937 pushop->op_sibling = first;
1938 listop->op_first = pushop;
1939 listop->op_flags |= OPf_KIDS;
1940 if (!last)
1941 listop->op_last = pushop;
1942 }
1943 else if (listop->op_children)
1944 listop->op_flags |= OPf_KIDS;
79072805
LW		 1945
1946 return (OP*)listop;
1947}
1948
1949OP *
8ac85365 1950newOP(I32 type, I32 flags)
79072805 1951{
11343788
MB		 1952 OP *o;
1953 Newz(1101, o, 1, OP);
1954 o->op_type = type;
1955 o->op_ppaddr = ppaddr[type];
1956 o->op_flags = flags;
79072805 1957
11343788
MB		 1958 o->op_next = o;
1959 o->op_private = 0 + (flags >> 8);
79072805 1960 if (opargs[type] & OA_RETSCALAR)
11343788 1961 scalar(o);
79072805 1962 if (opargs[type] & OA_TARGET)
11343788
MB		 1963 o->op_targ = pad_alloc(type, SVs_PADTMP);
1964 return CHECKOP(type, o);
79072805
LW		 1965}
1966
1967OP *
8ac85365 1968newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1969{
1970 UNOP *unop;
1971
93a17b20 1972 if (!first)
aeea060c 1973 first = newOP(OP_STUB, 0);
8990e307
LW		 1974 if (opargs[type] & OA_MARK)
1975 first = force_list(first);
93a17b20 1976
79072805
LW		 1977 Newz(1101, unop, 1, UNOP);
1978 unop->op_type = type;
1979 unop->op_ppaddr = ppaddr[type];
1980 unop->op_first = first;
1981 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1982 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1983#if 1
1984 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1985 first->op_type = OP_PUSHRE;
1986 first->op_ppaddr = ppaddr[OP_PUSHRE];
1987 }
1988#endif
e50aee73 1989 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1990 if (unop->op_next)
1991 return (OP*)unop;
1992
a0d0e21e 1993 return fold_constants((OP *) unop);
79072805
LW		 1994}
1995
1996OP *
8ac85365 1997newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1998{
1999 BINOP *binop;
2000 Newz(1101, binop, 1, BINOP);
2001
2002 if (!first)
2003 first = newOP(OP_NULL, 0);
2004
2005 binop->op_type = type;
2006 binop->op_ppaddr = ppaddr[type];
2007 binop->op_first = first;
2008 binop->op_flags = flags | OPf_KIDS;
2009 if (!last) {
2010 last = first;
c07a80fd 2011 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2012 }
2013 else {
c07a80fd 2014 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2015 first->op_sibling = last;
2016 }
2017
e50aee73 2018 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2019 if (binop->op_next)
2020 return (OP*)binop;
2021
2022 binop->op_last = last = binop->op_first->op_sibling;
2023
a0d0e21e 2024 return fold_constants((OP *)binop);
79072805
LW		 2025}
2026
2027OP *
8ac85365 2028pmtrans(OP *o, OP *expr, OP *repl)
79072805 2029{
79072805
LW		 2030 SV *tstr = ((SVOP*)expr)->op_sv;
2031 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2032 STRLEN tlen;
2033 STRLEN rlen;
ec49126f 2034 register U8 *t = (U8*)SvPV(tstr, tlen);
2035 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2036 register I32 i;
2037 register I32 j;
8ac85365 2038 I32 Delete;
79072805 2039 I32 complement;
5d06d08e 2040 I32 squash;
79072805
LW		 2041 register short *tbl;
2042
11343788
MB		 2043 tbl = (short*)cPVOPo->op_pv;
2044 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 2045 Delete = o->op_private & OPpTRANS_DELETE;
5d06d08e 2046 squash = o->op_private & OPpTRANS_SQUASH;
79072805
LW		 2047
2048 if (complement) {
2049 Zero(tbl, 256, short);
2050 for (i = 0; i < tlen; i++)
ec49126f 2051 tbl[t[i]] = -1;
79072805
LW		 2052 for (i = 0, j = 0; i < 256; i++) {
2053 if (!tbl[i]) {
2054 if (j >= rlen) {
8ac85365 2055 if (Delete)
79072805
LW		 2056 tbl[i] = -2;
2057 else if (rlen)
ec49126f 2058 tbl[i] = r[j-1];
79072805
LW		 2059 else
2060 tbl[i] = i;
2061 }
2062 else
ec49126f 2063 tbl[i] = r[j++];
79072805
LW		 2064 }
2065 }
2066 }
2067 else {
8ac85365 2068 if (!rlen && !Delete) {
79072805 2069 r = t; rlen = tlen;
5d06d08e
MB		 2070 if (!squash)
2071 o->op_private |= OPpTRANS_COUNTONLY;
79072805
LW		 2072 }
2073 for (i = 0; i < 256; i++)
2074 tbl[i] = -1;
2075 for (i = 0, j = 0; i < tlen; i++,j++) {
2076 if (j >= rlen) {
8ac85365 2077 if (Delete) {
ec49126f 2078 if (tbl[t[i]] == -1)
2079 tbl[t[i]] = -2;
79072805
LW		 2080 continue;
2081 }
2082 --j;
2083 }
ec49126f 2084 if (tbl[t[i]] == -1)
2085 tbl[t[i]] = r[j];
79072805
LW		 2086 }
2087 }
2088 op_free(expr);
2089 op_free(repl);
2090
11343788 2091 return o;
79072805
LW		 2092}
2093
2094OP *
8ac85365 2095newPMOP(I32 type, I32 flags)
79072805 2096{
11343788 2097 dTHR;
79072805
LW		 2098 PMOP *pmop;
2099
2100 Newz(1101, pmop, 1, PMOP);
2101 pmop->op_type = type;
2102 pmop->op_ppaddr = ppaddr[type];
2103 pmop->op_flags = flags;
c07a80fd 2104 pmop->op_private = 0 | (flags >> 8);
79072805 2105
b3eb6a9b
GS		 2106 if (hints & HINT_RE_TAINT)
2107 pmop->op_pmpermflags |= PMf_RETAINT;
36477c24 2108 if (hints & HINT_LOCALE)
b3eb6a9b
GS		 2109 pmop->op_pmpermflags |= PMf_LOCALE;
2110 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2111
79072805 2112 /* link into pm list */
a0d0e21e 2113 if (type != OP_TRANS && curstash) {
79072805
LW		 2114 pmop->op_pmnext = HvPMROOT(curstash);
2115 HvPMROOT(curstash) = pmop;
2116 }
2117
2118 return (OP*)pmop;
2119}
2120
2121OP *
8ac85365 2122pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2123{
2124 PMOP *pm;
2125 LOGOP *rcop;
ce862d02 2126 I32 repl_has_vars = 0;
79072805 2127
11343788
MB		 2128 if (o->op_type == OP_TRANS)
2129 return pmtrans(o, expr, repl);
79072805 2130
3e3baf6d 2131 hints |= HINT_BLOCK_SCOPE;
11343788 2132 pm = (PMOP*)o;
79072805
LW		 2133
2134 if (expr->op_type == OP_CONST) {
463ee0b2 2135 STRLEN plen;
79072805 2136 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2137 char *p = SvPV(pat, plen);
11343788 2138 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2139 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2140 p = SvPV(pat, plen);
79072805
LW		 2141 pm->op_pmflags |= PMf_SKIPWHITE;
2142 }
15e52e56 2143 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2144 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2145 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2146 op_free(expr);
2147 }
2148 else {
463ee0b2
LW		 2149 if (pm->op_pmflags & PMf_KEEP)
2150 expr = newUNOP(OP_REGCMAYBE,0,expr);
2151
79072805
LW		 2152 Newz(1101, rcop, 1, LOGOP);
2153 rcop->op_type = OP_REGCOMP;
2154 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2155 rcop->op_first = scalar(expr);
2156 rcop->op_flags |= OPf_KIDS;
2157 rcop->op_private = 1;
11343788 2158 rcop->op_other = o;
79072805
LW		 2159
2160 /* establish postfix order */
463ee0b2
LW		 2161 if (pm->op_pmflags & PMf_KEEP) {
2162 LINKLIST(expr);
2163 rcop->op_next = expr;
2164 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2165 }
2166 else {
2167 rcop->op_next = LINKLIST(expr);
2168 expr->op_next = (OP*)rcop;
2169 }
79072805 2170
11343788 2171 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2172 }
2173
2174 if (repl) {
748a9306
LW		 2175 OP *curop;
2176 if (pm->op_pmflags & PMf_EVAL)
2177 curop = 0;
554b3eca 2178#ifdef USE_THREADS
2faa37cc 2179 else if (repl->op_type == OP_THREADSV
554b3eca 2180 && strchr("&`'123456789+",
54b9620d 2181 threadsv_names[repl->op_targ]))
554b3eca
MB		 2182 {
2183 curop = 0;
2184 }
2185#endif /* USE_THREADS */
748a9306
LW		 2186 else if (repl->op_type == OP_CONST)
2187 curop = repl;
79072805 2188 else {
79072805
LW		 2189 OP *lastop = 0;
2190 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2191 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2192#ifdef USE_THREADS
ce862d02
IZ		 2193 if (curop->op_type == OP_THREADSV) {
2194 repl_has_vars = 1;
be949f6f 2195 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2196 break;
554b3eca
MB		 2197 }
2198#else
79072805
LW		 2199 if (curop->op_type == OP_GV) {
2200 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2201 repl_has_vars = 1;
93a17b20 2202 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2203 break;
2204 }
554b3eca 2205#endif /* USE_THREADS */
79072805
LW		 2206 else if (curop->op_type == OP_RV2CV)
2207 break;
2208 else if (curop->op_type == OP_RV2SV ||
2209 curop->op_type == OP_RV2AV ||
2210 curop->op_type == OP_RV2HV ||
2211 curop->op_type == OP_RV2GV) {
2212 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2213 break;
2214 }
748a9306
LW		 2215 else if (curop->op_type == OP_PADSV ||
2216 curop->op_type == OP_PADAV ||
2217 curop->op_type == OP_PADHV ||
554b3eca 2218 curop->op_type == OP_PADANY) {
ce862d02 2219 repl_has_vars = 1;
748a9306 2220 }
79072805
LW		 2221 else
2222 break;
2223 }
2224 lastop = curop;
2225 }
748a9306 2226 }
ce862d02
IZ		 2227 if (curop == repl
2228 && !(repl_has_vars
2229 && (!pm->op_pmregexp
2230 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2231 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2232 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2233 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2234 }
2235 else {
ce862d02
IZ		 2236 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2237 pm->op_pmflags |= PMf_MAYBE_CONST;
2238 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2239 }
748a9306
LW		 2240 Newz(1101, rcop, 1, LOGOP);
2241 rcop->op_type = OP_SUBSTCONT;
2242 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2243 rcop->op_first = scalar(repl);
2244 rcop->op_flags |= OPf_KIDS;
2245 rcop->op_private = 1;
11343788 2246 rcop->op_other = o;
748a9306
LW		 2247
2248 /* establish postfix order */
2249 rcop->op_next = LINKLIST(repl);
2250 repl->op_next = (OP*)rcop;
2251
2252 pm->op_pmreplroot = scalar((OP*)rcop);
2253 pm->op_pmreplstart = LINKLIST(rcop);
2254 rcop->op_next = 0;
79072805
LW		 2255 }
2256 }
2257
2258 return (OP*)pm;
2259}
2260
2261OP *
8ac85365 2262newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2263{
2264 SVOP *svop;
2265 Newz(1101, svop, 1, SVOP);
2266 svop->op_type = type;
2267 svop->op_ppaddr = ppaddr[type];
2268 svop->op_sv = sv;
2269 svop->op_next = (OP*)svop;
2270 svop->op_flags = flags;
2271 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2272 scalar((OP*)svop);
79072805 2273 if (opargs[type] & OA_TARGET)
ed6116ce 2274 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2275 return CHECKOP(type, svop);
79072805
LW		 2276}
2277
2278OP *
8ac85365 2279newGVOP(I32 type, I32 flags, GV *gv)
79072805 2280{
11343788 2281 dTHR;
79072805
LW		 2282 GVOP *gvop;
2283 Newz(1101, gvop, 1, GVOP);
2284 gvop->op_type = type;
2285 gvop->op_ppaddr = ppaddr[type];
8990e307 2286 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2287 gvop->op_next = (OP*)gvop;
2288 gvop->op_flags = flags;
2289 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2290 scalar((OP*)gvop);
79072805 2291 if (opargs[type] & OA_TARGET)
ed6116ce 2292 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2293 return CHECKOP(type, gvop);
79072805
LW		 2294}
2295
2296OP *
8ac85365 2297newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2298{
2299 PVOP *pvop;
2300 Newz(1101, pvop, 1, PVOP);
2301 pvop->op_type = type;
2302 pvop->op_ppaddr = ppaddr[type];
2303 pvop->op_pv = pv;
2304 pvop->op_next = (OP*)pvop;
2305 pvop->op_flags = flags;
2306 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2307 scalar((OP*)pvop);
79072805 2308 if (opargs[type] & OA_TARGET)
ed6116ce 2309 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2310 return CHECKOP(type, pvop);
79072805
LW		 2311}
2312
79072805 2313void
8ac85365 2314package(OP *o)
79072805 2315{
11343788 2316 dTHR;
93a17b20 2317 SV *sv;
79072805
LW		 2318
2319 save_hptr(&curstash);
2320 save_item(curstname);
11343788 2321 if (o) {
463ee0b2
LW		 2322 STRLEN len;
2323 char *name;
11343788 2324 sv = cSVOPo->op_sv;
463ee0b2 2325 name = SvPV(sv, len);
b1cb66bf 2326 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2327 sv_setpvn(curstname, name, len);
11343788 2328 op_free(o);
93a17b20
LW		 2329 }
2330 else {
2331 sv_setpv(curstname,"<none>");
2332 curstash = Nullhv;
2333 }
79072805 2334 copline = NOLINE;
8990e307 2335 expect = XSTATE;
79072805
LW		 2336}
2337
85e6fe83 2338void
8ac85365 2339utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2340{
a0d0e21e
LW		 2341 OP *pack;
2342 OP *meth;
2343 OP *rqop;
2344 OP *imop;
b1cb66bf 2345 OP *veop;
85e6fe83 2346
a0d0e21e
LW		 2347 if (id->op_type != OP_CONST)
2348 croak("Module name must be constant");
85e6fe83 2349
b1cb66bf 2350 veop = Nullop;
2351
2352 if(version != Nullop) {
2353 SV *vesv = ((SVOP*)version)->op_sv;
2354
2355 if (arg == Nullop && !SvNIOK(vesv)) {
2356 arg = version;
2357 }
2358 else {
2359 OP *pack;
2360 OP *meth;
2361
2362 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2363 croak("Version number must be constant number");
2364
2365 /* Make copy of id so we don't free it twice */
2366 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2367
2368 /* Fake up a method call to VERSION */
2369 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2370 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2371 append_elem(OP_LIST,
2372 prepend_elem(OP_LIST, pack, list(version)),
2373 newUNOP(OP_METHOD, 0, meth)));
2374 }
2375 }
aeea060c 2376
a0d0e21e 2377 /* Fake up an import/unimport */
4633a7c4
LW		 2378 if (arg && arg->op_type == OP_STUB)
2379 imop = arg; /* no import on explicit () */
b1cb66bf 2380 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2381 imop = Nullop; /* use 5.0; */
2382 }
4633a7c4
LW		 2383 else {
2384 /* Make copy of id so we don't free it twice */
2385 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2386 meth = newSVOP(OP_CONST, 0,
2387 aver
2388 ? newSVpv("import", 6)
2389 : newSVpv("unimport", 8)
2390 );
2391 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2392 append_elem(OP_LIST,
2393 prepend_elem(OP_LIST, pack, list(arg)),
2394 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2395 }
2396
2397 /* Fake up a require */
2398 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2399
2400 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2401 newSUB(floor,
a0d0e21e 2402 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2403 Nullop,
a0d0e21e 2404 append_elem(OP_LINESEQ,
b1cb66bf 2405 append_elem(OP_LINESEQ,
2406 newSTATEOP(0, Nullch, rqop),
2407 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2408 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2409
85e6fe83
LW		 2410 copline = NOLINE;
2411 expect = XSTATE;
2412}
2413
79072805 2414OP *
8ac85365 2415newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2416{
2417 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2418 list(force_list(subscript)),
2419 list(force_list(listval)) );
79072805
LW		 2420}
2421
76e3520e 2422STATIC I32
8ac85365 2423list_assignment(register OP *o)
79072805 2424{
11343788 2425 if (!o)
79072805
LW		 2426 return TRUE;
2427
11343788
MB		 2428 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2429 o = cUNOPo->op_first;
79072805 2430
11343788
MB		 2431 if (o->op_type == OP_COND_EXPR) {
2432 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2433 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2434
2435 if (t && f)
2436 return TRUE;
2437 if (t || f)
2438 yyerror("Assignment to both a list and a scalar");
2439 return FALSE;
2440 }
2441
11343788
MB		 2442 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2443 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2444 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2445 return TRUE;
2446
11343788 2447 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2448 return TRUE;
2449
11343788 2450 if (o->op_type == OP_RV2SV)
79072805
LW		 2451 return FALSE;
2452
2453 return FALSE;
2454}
2455
2456OP *
8ac85365 2457newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2458{
11343788 2459 OP *o;
79072805 2460
a0d0e21e
LW		 2461 if (optype) {
2462 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2463 return newLOGOP(optype, 0,
2464 mod(scalar(left), optype),
2465 newUNOP(OP_SASSIGN, 0, scalar(right)));
2466 }
2467 else {
2468 return newBINOP(optype, OPf_STACKED,
2469 mod(scalar(left), optype), scalar(right));
2470 }
2471 }
2472
79072805 2473 if (list_assignment(left)) {
6ee623d5 2474 dTHR;
463ee0b2 2475 modcount = 0;
748a9306 2476 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2477 left = mod(left, OP_AASSIGN);
748a9306
LW		 2478 if (eval_start)
2479 eval_start = 0;
2480 else {
a0d0e21e
LW		 2481 op_free(left);
2482 op_free(right);
2483 return Nullop;
2484 }
11343788 2485 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2486 list(force_list(right)),
2487 list(force_list(left)) );
11343788 2488 o->op_private = 0 | (flags >> 8);
a0d0e21e 2489 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2490 OP *curop;
11343788 2491 OP *lastop = o;
79072805 2492 generation++;
11343788 2493 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2494 if (opargs[curop->op_type] & OA_DANGEROUS) {
2495 if (curop->op_type == OP_GV) {
2496 GV *gv = ((GVOP*)curop)->op_gv;
2497 if (gv == defgv || SvCUR(gv) == generation)
2498 break;
2499 SvCUR(gv) = generation;
2500 }
748a9306
LW		 2501 else if (curop->op_type == OP_PADSV ||
2502 curop->op_type == OP_PADAV ||
2503 curop->op_type == OP_PADHV ||
2504 curop->op_type == OP_PADANY) {
2505 SV **svp = AvARRAY(comppad_name);
8e07c86e 2506 SV *sv = svp[curop->op_targ];
748a9306
LW		 2507 if (SvCUR(sv) == generation)
2508 break;
2509 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2510 }
79072805
LW		 2511 else if (curop->op_type == OP_RV2CV)
2512 break;
2513 else if (curop->op_type == OP_RV2SV ||
2514 curop->op_type == OP_RV2AV ||
2515 curop->op_type == OP_RV2HV ||
2516 curop->op_type == OP_RV2GV) {
2517 if (lastop->op_type != OP_GV) /* funny deref? */
2518 break;
2519 }
2520 else
2521 break;
2522 }
2523 lastop = curop;
2524 }
11343788
MB		 2525 if (curop != o)
2526 o->op_private = OPpASSIGN_COMMON;
79072805 2527 }
c07a80fd 2528 if (right && right->op_type == OP_SPLIT) {
2529 OP* tmpop;
2530 if ((tmpop = ((LISTOP*)right)->op_first) &&
2531 tmpop->op_type == OP_PUSHRE)
2532 {
2533 PMOP *pm = (PMOP*)tmpop;
2534 if (left->op_type == OP_RV2AV &&
2535 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2536 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2537 {
2538 tmpop = ((UNOP*)left)->op_first;
2539 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2540 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2541 pm->op_pmflags |= PMf_ONCE;
11343788 2542 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2543 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2544 tmpop->op_sibling = Nullop; /* don't free split */
2545 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2546 op_free(o); /* blow off assign */
54310121 2547 right->op_flags &= ~OPf_WANT;
a5f75d66 2548 /* "I don't know and I don't care." */
c07a80fd 2549 return right;
2550 }
2551 }
2552 else {
2553 if (modcount < 10000 &&
2554 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2555 {
2556 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2557 if (SvIVX(sv) == 0)
2558 sv_setiv(sv, modcount+1);
2559 }
2560 }
2561 }
2562 }
11343788 2563 return o;
79072805
LW		 2564 }
2565 if (!right)
2566 right = newOP(OP_UNDEF, 0);
2567 if (right->op_type == OP_READLINE) {
2568 right->op_flags |= OPf_STACKED;
463ee0b2 2569 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2570 }
a0d0e21e 2571 else {
748a9306 2572 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2573 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2574 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2575 if (eval_start)
2576 eval_start = 0;
2577 else {
11343788 2578 op_free(o);
a0d0e21e
LW		 2579 return Nullop;
2580 }
2581 }
11343788 2582 return o;
79072805
LW		 2583}
2584
2585OP *
8ac85365 2586newSTATEOP(I32 flags, char *label, OP *o)
79072805 2587{
11343788 2588 dTHR;
bbce6d69 2589 U32 seq = intro_my();
79072805
LW		 2590 register COP *cop;
2591
2592 Newz(1101, cop, 1, COP);
84902520 2593 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2594 cop->op_type = OP_DBSTATE;
2595 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2596 }
2597 else {
2598 cop->op_type = OP_NEXTSTATE;
2599 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2600 }
79072805 2601 cop->op_flags = flags;
c07a80fd 2602 cop->op_private = 0 | (flags >> 8);
ff0cee69 2603#ifdef NATIVE_HINTS
2604 cop->op_private |= NATIVE_HINTS;
2605#endif
79072805
LW		 2606 cop->op_next = (OP*)cop;
2607
463ee0b2
LW		 2608 if (label) {
2609 cop->cop_label = label;
85e6fe83 2610 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2611 }
bbce6d69 2612 cop->cop_seq = seq;
a0d0e21e 2613 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2614
2615 if (copline == NOLINE)
2616 cop->cop_line = curcop->cop_line;
2617 else {
2618 cop->cop_line = copline;
2619 copline = NOLINE;
2620 }
44a8e56a 2621 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2622 cop->cop_stash = curstash;
2623
84902520 2624 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2625 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2626 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2627 (void)SvIOK_on(*svp);
a5f75d66 2628 SvIVX(*svp) = 1;
93a17b20
LW		 2629 SvSTASH(*svp) = (HV*)cop;
2630 }
2631 }
2632
11343788 2633 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2634}
2635
bbce6d69 2636/* "Introduce" my variables to visible status. */
2637U32
8ac85365 2638intro_my(void)
bbce6d69 2639{
2640 SV **svp;
2641 SV *sv;
2642 I32 i;
2643
2644 if (! min_intro_pending)
2645 return cop_seqmax;
2646
2647 svp = AvARRAY(comppad_name);
2648 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2649 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2650 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2651 SvNVX(sv) = (double)cop_seqmax;
2652 }
2653 }
2654 min_intro_pending = 0;
2655 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2656 return cop_seqmax++;
2657}
2658
79072805 2659OP *
8ac85365 2660newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2661{
883ffac3
CS		 2662 return new_logop(type, flags, &first, &other);
2663}
2664
3bd495df 2665STATIC OP *
883ffac3
CS		 2666new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2667{
11343788 2668 dTHR;
79072805 2669 LOGOP *logop;
11343788 2670 OP *o;
883ffac3
CS		 2671 OP *first = *firstp;
2672 OP *other = *otherp;
79072805 2673
a0d0e21e
LW		 2674 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2675 return newBINOP(type, flags, scalar(first), scalar(other));
2676
8990e307 2677 scalarboolean(first);
79072805
LW		 2678 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2679 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2680 if (type == OP_AND || type == OP_OR) {
2681 if (type == OP_AND)
2682 type = OP_OR;
2683 else
2684 type = OP_AND;
11343788 2685 o = first;
883ffac3 2686 first = *firstp = cUNOPo->op_first;
11343788
MB		 2687 if (o->op_next)
2688 first->op_next = o->op_next;
2689 cUNOPo->op_first = Nullop;
2690 op_free(o);
79072805
LW		 2691 }
2692 }
2693 if (first->op_type == OP_CONST) {
93a17b20 2694 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2695 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2696 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2697 op_free(first);
883ffac3 2698 *firstp = Nullop;
79072805
LW		 2699 return other;
2700 }
2701 else {
2702 op_free(other);
883ffac3 2703 *otherp = Nullop;
79072805
LW		 2704 return first;
2705 }
2706 }
2707 else if (first->op_type == OP_WANTARRAY) {
2708 if (type == OP_AND)
2709 list(other);
2710 else
2711 scalar(other);
2712 }
a6006777 2713 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2714 OP *k1 = ((UNOP*)first)->op_first;
2715 OP *k2 = k1->op_sibling;
2716 OPCODE warnop = 0;
2717 switch (first->op_type)
2718 {
2719 case OP_NULL:
2720 if (k2 && k2->op_type == OP_READLINE
2721 && (k2->op_flags & OPf_STACKED)
55d729e4 2722 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 2723 warnop = k2->op_type;
2724 break;
2725
2726 case OP_SASSIGN:
68dc0745 2727 if (k1->op_type == OP_READDIR
2728 || k1->op_type == OP_GLOB
2729 || k1->op_type == OP_EACH)
a6006777 2730 warnop = k1->op_type;
2731 break;
2732 }
8ebc5c01 2733 if (warnop) {
2734 line_t oldline = curcop->cop_line;
2735 curcop->cop_line = copline;
68dc0745 2736 warn("Value of %s%s can be \"0\"; test with defined()",
2737 op_desc[warnop],
2738 ((warnop == OP_READLINE || warnop == OP_GLOB)
2739 ? " construct" : "() operator"));
2740 curcop->cop_line = oldline;
8ebc5c01 2741 }
a6006777 2742 }
79072805
LW		 2743
2744 if (!other)
2745 return first;
2746
a0d0e21e
LW		 2747 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2748 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2749
79072805
LW		 2750 Newz(1101, logop, 1, LOGOP);
2751
2752 logop->op_type = type;
2753 logop->op_ppaddr = ppaddr[type];
2754 logop->op_first = first;
2755 logop->op_flags = flags | OPf_KIDS;
2756 logop->op_other = LINKLIST(other);
c07a80fd 2757 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2758
2759 /* establish postfix order */
2760 logop->op_next = LINKLIST(first);
2761 first->op_next = (OP*)logop;
2762 first->op_sibling = other;
2763
11343788
MB		 2764 o = newUNOP(OP_NULL, 0, (OP*)logop);
2765 other->op_next = o;
79072805 2766
11343788 2767 return o;
79072805
LW		 2768}
2769
2770OP *
8ac85365 2771newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2772{
11343788 2773 dTHR;
79072805 2774 CONDOP *condop;
11343788 2775 OP *o;
79072805 2776
b1cb66bf 2777 if (!falseop)
2778 return newLOGOP(OP_AND, 0, first, trueop);
2779 if (!trueop)
2780 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2781
8990e307 2782 scalarboolean(first);
79072805
LW		 2783 if (first->op_type == OP_CONST) {
2784 if (SvTRUE(((SVOP*)first)->op_sv)) {
2785 op_free(first);
b1cb66bf 2786 op_free(falseop);
2787 return trueop;
79072805
LW		 2788 }
2789 else {
2790 op_free(first);
b1cb66bf 2791 op_free(trueop);
2792 return falseop;
79072805
LW		 2793 }
2794 }
2795 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2796 list(trueop);
2797 scalar(falseop);
79072805
LW		 2798 }
2799 Newz(1101, condop, 1, CONDOP);
2800
2801 condop->op_type = OP_COND_EXPR;
2802 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2803 condop->op_first = first;
2804 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2805 condop->op_true = LINKLIST(trueop);
2806 condop->op_false = LINKLIST(falseop);
c07a80fd 2807 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2808
2809 /* establish postfix order */
2810 condop->op_next = LINKLIST(first);
2811 first->op_next = (OP*)condop;
2812
b1cb66bf 2813 first->op_sibling = trueop;
2814 trueop->op_sibling = falseop;
11343788 2815 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2816
5dc0d613
MB		 2817 trueop->op_next = o;
2818 falseop->op_next = o;
79072805 2819
11343788 2820 return o;
79072805
LW		 2821}
2822
2823OP *
8ac85365 2824newRANGE(I32 flags, OP *left, OP *right)
79072805 2825{
b35b2403 2826 dTHR;
79072805
LW		 2827 CONDOP *condop;
2828 OP *flip;
2829 OP *flop;
11343788 2830 OP *o;
79072805
LW		 2831
2832 Newz(1101, condop, 1, CONDOP);
2833
2834 condop->op_type = OP_RANGE;
2835 condop->op_ppaddr = ppaddr[OP_RANGE];
2836 condop->op_first = left;
2837 condop->op_flags = OPf_KIDS;
2838 condop->op_true = LINKLIST(left);
2839 condop->op_false = LINKLIST(right);
c07a80fd 2840 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2841
2842 left->op_sibling = right;
2843
2844 condop->op_next = (OP*)condop;
2845 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2846 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2847 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2848 linklist(flop);
2849
2850 left->op_next = flip;
2851 right->op_next = flop;
2852
ed6116ce 2853 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2854 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2855 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2856 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2857
2858 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2859 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2860
11343788 2861 flip->op_next = o;
79072805 2862 if (!flip->op_private || !flop->op_private)
11343788 2863 linklist(o); /* blow off optimizer unless constant */
79072805 2864
11343788 2865 return o;
79072805
LW		 2866}
2867
2868OP *
8ac85365 2869newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2870{
11343788 2871 dTHR;
463ee0b2 2872 OP* listop;
11343788 2873 OP* o;
463ee0b2 2874 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2875 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2876
463ee0b2
LW		 2877 if (expr) {
2878 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2879 return block; /* do {} while 0 does once */
fb73857a 2880 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2881 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2882 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2883 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 2884 } else if (expr->op_flags & OPf_KIDS) {
2885 OP *k1 = ((UNOP*)expr)->op_first;
2886 OP *k2 = (k1) ? k1->op_sibling : NULL;
2887 switch (expr->op_type) {
2888 case OP_NULL:
2889 if (k2 && k2->op_type == OP_READLINE
2890 && (k2->op_flags & OPf_STACKED)
2891 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
2892 expr = newUNOP(OP_DEFINED, 0, expr);
2893 break;
2894
2895 case OP_SASSIGN:
2896 if (k1->op_type == OP_READDIR
2897 || k1->op_type == OP_GLOB
2898 || k1->op_type == OP_EACH)
2899 expr = newUNOP(OP_DEFINED, 0, expr);
2900 break;
2901 }
774d564b 2902 }
463ee0b2 2903 }
93a17b20 2904
8990e307 2905 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 2906 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 2907
883ffac3
CS		 2908 if (listop)
2909 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2910
11343788
MB		 2911 if (once && o != listop)
2912 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2913
11343788
MB		 2914 if (o == listop)
2915 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2916
11343788
MB		 2917 o->op_flags |= flags;
2918 o = scope(o);
2919 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2920 return o;
79072805
LW		 2921}
2922
2923OP *
8ac85365 2924newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2925{
11343788 2926 dTHR;
79072805
LW		 2927 OP *redo;
2928 OP *next = 0;
2929 OP *listop;
11343788 2930 OP *o;
79072805
LW		 2931 OP *condop;
2932
fb73857a 2933 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2934 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2935 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2936 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 2937 } else if (expr && (expr->op_flags & OPf_KIDS)) {
2938 OP *k1 = ((UNOP*)expr)->op_first;
2939 OP *k2 = (k1) ? k1->op_sibling : NULL;
2940 switch (expr->op_type) {
2941 case OP_NULL:
2942 if (k2 && k2->op_type == OP_READLINE
2943 && (k2->op_flags & OPf_STACKED)
2944 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
2945 expr = newUNOP(OP_DEFINED, 0, expr);
2946 break;
2947
2948 case OP_SASSIGN:
2949 if (k1->op_type == OP_READDIR
2950 || k1->op_type == OP_GLOB
2951 || k1->op_type == OP_EACH)
2952 expr = newUNOP(OP_DEFINED, 0, expr);
2953 break;
2954 }
748a9306 2955 }
79072805
LW		 2956
2957 if (!block)
2958 block = newOP(OP_NULL, 0);
2959
2960 if (cont)
2961 next = LINKLIST(cont);
fb73857a 2962 if (expr) {
79072805 2963 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2964 if ((line_t)whileline != NOLINE) {
2965 copline = whileline;
2966 cont = append_elem(OP_LINESEQ, cont,
2967 newSTATEOP(0, Nullch, Nullop));
2968 }
2969 }
79072805 2970
463ee0b2 2971 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2972 redo = LINKLIST(listop);
2973
2974 if (expr) {
883ffac3
CS		 2975 copline = whileline;
2976 scalar(listop);
2977 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 2978 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2979 op_free(expr); /* oops, it's a while (0) */
463ee0b2 2980 op_free((OP*)loop);
883ffac3 2981 return Nullop; /* listop already freed by new_logop */
463ee0b2 2982 }
883ffac3
CS		 2983 if (listop)
2984 ((LISTOP*)listop)->op_last->op_next = condop =
2985 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2986 if (!next)
2987 next = condop;
2988 }
2989 else
11343788 2990 o = listop;
79072805
LW		 2991
2992 if (!loop) {
2993 Newz(1101,loop,1,LOOP);
2994 loop->op_type = OP_ENTERLOOP;
2995 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2996 loop->op_private = 0;
2997 loop->op_next = (OP*)loop;
2998 }
2999
11343788 3000 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3001
3002 loop->op_redoop = redo;
11343788 3003 loop->op_lastop = o;
79072805
LW		 3004
3005 if (next)
3006 loop->op_nextop = next;
3007 else
11343788 3008 loop->op_nextop = o;
79072805 3009
11343788
MB		 3010 o->op_flags |= flags;
3011 o->op_private |= (flags >> 8);
3012 return o;
79072805
LW		 3013}
3014
3015OP *
8990e307 3016newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3017{
3018 LOOP *loop;
fb73857a 3019 OP *wop;
85e6fe83 3020 int padoff = 0;
4633a7c4 3021 I32 iterflags = 0;
79072805 3022
79072805 3023 if (sv) {
85e6fe83 3024 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 3025 sv->op_type = OP_RV2GV;
3026 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 3027 }
85e6fe83
LW		 3028 else if (sv->op_type == OP_PADSV) { /* private variable */
3029 padoff = sv->op_targ;
3030 op_free(sv);
3031 sv = Nullop;
3032 }
54b9620d
MB		 3033 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3034 padoff = sv->op_targ;
3035 iterflags |= OPf_SPECIAL;
3036 op_free(sv);
3037 sv = Nullop;
3038 }
79072805 3039 else
c07a80fd 3040 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 3041 }
3042 else {
54b9620d
MB		 3043#ifdef USE_THREADS
3044 padoff = find_threadsv("_");
3045 iterflags |= OPf_SPECIAL;
3046#else
79072805 3047 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 3048#endif
79072805 3049 }
5f05dabc 3050 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3051 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3052 iterflags |= OPf_STACKED;
3053 }
89ea2908
GA		 3054 else if (expr->op_type == OP_NULL &&
3055 (expr->op_flags & OPf_KIDS) &&
3056 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3057 {
3058 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3059 * set the STACKED flag to indicate that these values are to be
3060 * treated as min/max values by 'pp_iterinit'.
3061 */
3062 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3063 CONDOP* range = (CONDOP*) flip->op_first;
3064 OP* left = range->op_first;
3065 OP* right = left->op_sibling;
5152d7c7 3066 LISTOP* listop;
89ea2908
GA		 3067
3068 range->op_flags &= ~OPf_KIDS;
3069 range->op_first = Nullop;
3070
5152d7c7
GS		 3071 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3072 listop->op_first->op_next = range->op_true;
89ea2908 3073 left->op_next = range->op_false;
5152d7c7
GS		 3074 right->op_next = (OP*)listop;
3075 listop->op_next = listop->op_first;
89ea2908
GA		 3076
3077 op_free(expr);
5152d7c7 3078 expr = (OP*)(listop);
89ea2908
GA		 3079 null(expr);
3080 iterflags |= OPf_STACKED;
3081 }
3082 else {
3083 expr = mod(force_list(expr), OP_GREPSTART);
3084 }
3085
3086
4633a7c4 3087 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3088 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3089 assert(!loop->op_next);
3090 Renew(loop, 1, LOOP);
3091 loop->op_targ = padoff;
fb73857a 3092 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3093 copline = forline;
3094 return newSTATEOP(0, label, wop);
79072805
LW		 3095}
3096
8990e307 3097OP*
8ac85365 3098newLOOPEX(I32 type, OP *label)
8990e307 3099{
11343788
MB		 3100 dTHR;
3101 OP *o;
8990e307 3102 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3103 /* "last()" means "last" */
3104 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3105 o = newOP(type, OPf_SPECIAL);
3106 else {
3107 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3108 ? SvPVx(((SVOP*)label)->op_sv, na)
3109 : ""));
3110 }
8990e307
LW		 3111 op_free(label);
3112 }
3113 else {
a0d0e21e
LW		 3114 if (label->op_type == OP_ENTERSUB)
3115 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3116 o = newUNOP(type, OPf_STACKED, label);
8990e307 3117 }
85e6fe83 3118 hints |= HINT_BLOCK_SCOPE;
11343788 3119 return o;
8990e307
LW		 3120}
3121
79072805 3122void
8ac85365 3123cv_undef(CV *cv)
79072805 3124{
11343788
MB		 3125 dTHR;
3126#ifdef USE_THREADS
e858de61
MB		 3127 if (CvMUTEXP(cv)) {
3128 MUTEX_DESTROY(CvMUTEXP(cv));
3129 Safefree(CvMUTEXP(cv));
3130 CvMUTEXP(cv) = 0;
3131 }
11343788
MB		 3132#endif /* USE_THREADS */
3133
a0d0e21e 3134 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3135#ifdef USE_THREADS
3136 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3137 croak("Can't undef active subroutine");
3138#else
a0d0e21e
LW		 3139 if (CvDEPTH(cv))
3140 croak("Can't undef active subroutine");
11343788 3141#endif /* USE_THREADS */
8990e307 3142 ENTER;
a0d0e21e
LW		 3143
3144 SAVESPTR(curpad);
3145 curpad = 0;
3146
a5f75d66 3147 if (!CvCLONED(cv))
748a9306 3148 op_free(CvROOT(cv));
79072805 3149 CvROOT(cv) = Nullop;
8990e307 3150 LEAVE;
79072805 3151 }
1d5db326 3152 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3153 CvFLAGS(cv) = 0;
8e07c86e
AD		 3154 SvREFCNT_dec(CvGV(cv));
3155 CvGV(cv) = Nullgv;
3156 SvREFCNT_dec(CvOUTSIDE(cv));
3157 CvOUTSIDE(cv) = Nullcv;
3158 if (CvPADLIST(cv)) {
8ebc5c01 3159 /* may be during global destruction */
3160 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3161 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3162 while (i >= 0) {
3163 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3164 SV* sv = svp ? *svp : Nullsv;
3165 if (!sv)
3166 continue;
3167 if (sv == (SV*)comppad_name)
3168 comppad_name = Nullav;
3169 else if (sv == (SV*)comppad) {
3170 comppad = Nullav;
3171 curpad = Null(SV**);
3172 }
3173 SvREFCNT_dec(sv);
8ebc5c01 3174 }
3175 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3176 }
8e07c86e
AD		 3177 CvPADLIST(cv) = Nullav;
3178 }
79072805
LW		 3179}
3180
5f05dabc 3181#ifdef DEBUG_CLOSURES
76e3520e 3182STATIC void
5f05dabc 3183cv_dump(cv)
3184CV* cv;
3185{
3186 CV *outside = CvOUTSIDE(cv);
3187 AV* padlist = CvPADLIST(cv);
4fdae800 3188 AV* pad_name;
3189 AV* pad;
3190 SV** pname;
3191 SV** ppad;
5f05dabc 3192 I32 ix;
3193
fb73857a 3194 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3195 cv,
3196 (CvANON(cv) ? "ANON"
3197 : (cv == main_cv) ? "MAIN"
07055b4c 3198 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3199 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3200 outside,
3201 (!outside ? "null"
3202 : CvANON(outside) ? "ANON"
3203 : (outside == main_cv) ? "MAIN"
07055b4c 3204 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3205 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3206
4fdae800 3207 if (!padlist)
3208 return;
3209
3210 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3211 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3212 pname = AvARRAY(pad_name);
3213 ppad = AvARRAY(pad);
3214
93965878 3215 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3216 if (SvPOK(pname[ix]))
fb73857a 3217 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3218 ix, ppad[ix],
3219 SvFAKE(pname[ix]) ? "FAKE " : "",
3220 SvPVX(pname[ix]),
ab50184a
CS		 3221 (long)I_32(SvNVX(pname[ix])),
3222 (long)SvIVX(pname[ix]));
5f05dabc 3223 }
3224}
3225#endif /* DEBUG_CLOSURES */
3226
76e3520e 3227STATIC CV *
8ac85365 3228cv_clone2(CV *proto, CV *outside)
748a9306 3229{
11343788 3230 dTHR;
748a9306
LW		 3231 AV* av;
3232 I32 ix;
3233 AV* protopadlist = CvPADLIST(proto);
3234 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3235 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3236 SV** pname = AvARRAY(protopad_name);
3237 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3238 I32 fname = AvFILLp(protopad_name);
3239 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3240 AV* comppadlist;
3241 CV* cv;
3242
07055b4c
CS		 3243 assert(!CvUNIQUE(proto));
3244
748a9306
LW		 3245 ENTER;
3246 SAVESPTR(curpad);
3247 SAVESPTR(comppad);
46fc3d4c 3248 SAVESPTR(comppad_name);
748a9306
LW		 3249 SAVESPTR(compcv);
3250
3251 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3252 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3253 CvCLONED_on(cv);
5f05dabc 3254 if (CvANON(proto))
3255 CvANON_on(cv);
748a9306 3256
11343788 3257#ifdef USE_THREADS
12ca11f6 3258 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3259 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3260 CvOWNER(cv) = 0;
3261#endif /* USE_THREADS */
748a9306 3262 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3263 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3264 CvSTASH(cv) = CvSTASH(proto);
3265 CvROOT(cv) = CvROOT(proto);
3266 CvSTART(cv) = CvSTART(proto);
5f05dabc 3267 if (outside)
3268 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3269
68dc0745 3270 if (SvPOK(proto))
3271 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3272
46fc3d4c 3273 comppad_name = newAV();
3274 for (ix = fname; ix >= 0; ix--)
3275 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3276
3277 comppad = newAV();
3278
3279 comppadlist = newAV();
3280 AvREAL_off(comppadlist);
46fc3d4c 3281 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3282 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3283 CvPADLIST(cv) = comppadlist;
93965878 3284 av_fill(comppad, AvFILLp(protopad));
748a9306
LW		 3285 curpad = AvARRAY(comppad);
3286
3287 av = newAV(); /* will be @_ */
3288 av_extend(av, 0);
3289 av_store(comppad, 0, (SV*)av);
3290 AvFLAGS(av) = AVf_REIFY;
3291
9607fc9c 3292 for (ix = fpad; ix > 0; ix--) {
3293 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3294 if (namesv && namesv != &sv_undef) {
3295 char *name = SvPVX(namesv); /* XXX */
3296 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3297 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3298 CvOUTSIDE(cv), cxstack_ix);
3299 if (!off)
3300 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3301 else if (off != ix)
748a9306
LW		 3302 croak("panic: cv_clone: %s", name);
3303 }
3304 else { /* our own lexical */
aa689395 3305 SV* sv;
5f05dabc 3306 if (*name == '&') {
3307 /* anon code -- we'll come back for it */
3308 sv = SvREFCNT_inc(ppad[ix]);
3309 }
3310 else if (*name == '@')
3311 sv = (SV*)newAV();
748a9306 3312 else if (*name == '%')
5f05dabc 3313 sv = (SV*)newHV();
748a9306 3314 else
5f05dabc 3315 sv = NEWSV(0,0);
3316 if (!SvPADBUSY(sv))
3317 SvPADMY_on(sv);
3318 curpad[ix] = sv;
748a9306
LW		 3319 }
3320 }
3321 else {
aa689395 3322 SV* sv = NEWSV(0,0);
748a9306 3323 SvPADTMP_on(sv);
5f05dabc 3324 curpad[ix] = sv;
748a9306
LW		 3325 }
3326 }
3327
5f05dabc 3328 /* Now that vars are all in place, clone nested closures. */
3329
9607fc9c 3330 for (ix = fpad; ix > 0; ix--) {
3331 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3332 if (namesv
3333 && namesv != &sv_undef
3334 && !(SvFLAGS(namesv) & SVf_FAKE)
3335 && *SvPVX(namesv) == '&'
5f05dabc 3336 && CvCLONE(ppad[ix]))
3337 {
3338 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3339 SvREFCNT_dec(ppad[ix]);
3340 CvCLONE_on(kid);
3341 SvPADMY_on(kid);
3342 curpad[ix] = (SV*)kid;
748a9306
LW		 3343 }
3344 }
3345
5f05dabc 3346#ifdef DEBUG_CLOSURES
ab50184a
CS		 3347 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3348 cv_dump(outside);
3349 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3350 cv_dump(proto);
ab50184a 3351 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3352 cv_dump(cv);
3353#endif
3354
748a9306
LW		 3355 LEAVE;
3356 return cv;
3357}
3358
3359CV *
8ac85365 3360cv_clone(CV *proto)
5f05dabc 3361{
3362 return cv_clone2(proto, CvOUTSIDE(proto));
3363}
3364
3fe9a6f1 3365void
8ac85365 3366cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3367{
3368 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3369 SV* msg = sv_newmortal();
3fe9a6f1 3370 SV* name = Nullsv;
3371
3372 if (gv)
46fc3d4c 3373 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3374 sv_setpv(msg, "Prototype mismatch:");
3375 if (name)
fc36a67e 3376 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3377 if (SvPOK(cv))
46fc3d4c 3378 sv_catpvf(msg, " (%s)", SvPVX(cv));
3379 sv_catpv(msg, " vs ");
3380 if (p)
3381 sv_catpvf(msg, "(%s)", p);
3382 else
3383 sv_catpv(msg, "none");
fc36a67e 3384 warn("%_", msg);
3fe9a6f1 3385 }
3386}
3387
760ac839 3388SV *
8ac85365 3389cv_const_sv(CV *cv)
760ac839 3390{
54310121 3391 if (!cv || !SvPOK(cv) || SvCUR(cv))
3392 return Nullsv;
fe5e78ed
GS		 3393 return op_const_sv(CvSTART(cv), cv);
3394}
760ac839 3395
fe5e78ed
GS		 3396SV *
3397op_const_sv(OP *o, CV *cv)
3398{
3399 SV *sv = Nullsv;
3400
3401 if(!o)
3402 return Nullsv;
3403
3404 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3405 o = cLISTOPo->op_first->op_sibling;
3406
3407 for (; o; o = o->op_next) {
54310121 3408 OPCODE type = o->op_type;
fe5e78ed
GS		 3409
3410 if(sv && o->op_next == o)
3411 return sv;
54310121 3412 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3413 continue;
3414 if (type == OP_LEAVESUB || type == OP_RETURN)
3415 break;
3416 if (sv)
3417 return Nullsv;
3418 if (type == OP_CONST)
5dc0d613 3419 sv = cSVOPo->op_sv;
fe5e78ed 3420 else if (type == OP_PADSV && cv) {
e858de61
MB		 3421 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3422 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3423 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3424 return Nullsv;
760ac839 3425 }
54310121 3426 else
3427 return Nullsv;
760ac839 3428 }
5aabfad6 3429 if (sv)
3430 SvREADONLY_on(sv);
760ac839
LW		 3431 return sv;
3432}
3433
748a9306 3434CV *
8ac85365 3435newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3436{
11343788 3437 dTHR;
5dc0d613 3438 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
55d729e4
GS		 3439 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3440 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
3fe9a6f1 3441 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
a2008d6d 3442 register CV *cv=0;
a0d0e21e 3443 I32 ix;
79072805 3444
11343788 3445 if (o)
5dc0d613 3446 SAVEFREEOP(o);
3fe9a6f1 3447 if (proto)
3448 SAVEFREEOP(proto);
3449
55d729e4
GS		 3450 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3451 maximum a prototype before. */
3452 if (SvTYPE(gv) > SVt_NULL) {
3453 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1))
3454 warn("Runaway prototype");
3455 cv_ckproto((CV*)gv, NULL, ps);
3456 }
3457 if (ps)
3458 sv_setpv((SV*)gv, ps);
3459 else
3460 sv_setiv((SV*)gv, -1);
3461 SvREFCNT_dec(compcv);
57ff9a15 3462 cv = compcv = NULL;
55d729e4
GS		 3463 sub_generation++;
3464 goto noblock;
3465 }
3466
68dc0745 3467 if (!name || GvCVGEN(gv))
3468 cv = Nullcv;
3469 else if (cv = GvCV(gv)) {
3fe9a6f1 3470 cv_ckproto(cv, gv, ps);
68dc0745 3471 /* already defined (or promised)? */
3472 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3473 SV* const_sv;
fe5e78ed 3474 bool const_changed = TRUE;
aa689395 3475 if (!block) {
3476 /* just a "sub foo;" when &foo is already defined */
3477 SAVEFREESV(compcv);
3478 goto done;
3479 }
7bac28a0 3480 /* ahem, death to those who redefine active sort subs */
e788e7d3 3481 if (curstackinfo->si_type == PERLSI_SORT && sortcop == CvSTART(cv))
7bac28a0 3482 croak("Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3483 if(const_sv = cv_const_sv(cv))
3484 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
3485 if ((const_sv && const_changed) || dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3486 && HvNAME(GvSTASH(CvGV(cv)))
3487 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3488 "autouse"))) {
79072805 3489 line_t oldline = curcop->cop_line;
79072805 3490 curcop->cop_line = copline;
760ac839 3491 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3492 : "Subroutine %s redefined", name);
79072805
LW		 3493 curcop->cop_line = oldline;
3494 }
8990e307 3495 SvREFCNT_dec(cv);
68dc0745 3496 cv = Nullcv;
79072805
LW		 3497 }
3498 }
a0d0e21e 3499 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3500 cv_undef(cv);
44a8e56a 3501 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3502 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3503 CvOUTSIDE(compcv) = 0;
748a9306 3504 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3505 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3506 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3507 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3508 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3509 }
3510 else {
748a9306 3511 cv = compcv;
44a8e56a 3512 if (name) {
3513 GvCV(gv) = cv;
3514 GvCVGEN(gv) = 0;
3515 sub_generation++;
3516 }
a0d0e21e 3517 }
44a8e56a 3518 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3519 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3520 CvSTASH(cv) = curstash;
11343788
MB		 3521#ifdef USE_THREADS
3522 CvOWNER(cv) = 0;
12ca11f6 3523 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3524 MUTEX_INIT(CvMUTEXP(cv));
11343788 3525#endif /* USE_THREADS */
8990e307 3526
3fe9a6f1 3527 if (ps)
3528 sv_setpv((SV*)cv, ps);
4633a7c4 3529
c07a80fd 3530 if (error_count) {
3531 op_free(block);
3532 block = Nullop;
68dc0745 3533 if (name) {
3534 char *s = strrchr(name, ':');
3535 s = s ? s+1 : name;
6d4c2119
CS		 3536 if (strEQ(s, "BEGIN")) {
3537 char *not_safe =
3538 "BEGIN not safe after errors--compilation aborted";
3539 if (in_eval & 4)
3540 croak(not_safe);
3541 else {
3542 /* force display of errors found but not reported */
38a03e6e
MB		 3543 sv_catpv(ERRSV, not_safe);
3544 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3545 }
3546 }
68dc0745 3547 }
c07a80fd 3548 }
a0d0e21e 3549 if (!block) {
55d729e4 3550 noblock:
a0d0e21e
LW		 3551 copline = NOLINE;
3552 LEAVE_SCOPE(floor);
3553 return cv;
3554 }
3555
93965878
NIS		 3556 if (AvFILLp(comppad_name) < AvFILLp(comppad))
3557 av_store(comppad_name, AvFILLp(comppad), Nullsv);
a0d0e21e 3558
54310121 3559 if (CvCLONE(cv)) {
3560 SV **namep = AvARRAY(comppad_name);
93965878 3561 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3562 SV *namesv;
3563
3564 if (SvIMMORTAL(curpad[ix]))
3565 continue;
3566 /*
3567 * The only things that a clonable function needs in its
3568 * pad are references to outer lexicals and anonymous subs.
3569 * The rest are created anew during cloning.
3570 */
3571 if (!((namesv = namep[ix]) != Nullsv &&
3572 namesv != &sv_undef &&
3573 (SvFAKE(namesv) ||
3574 *SvPVX(namesv) == '&')))
3575 {
3576 SvREFCNT_dec(curpad[ix]);
3577 curpad[ix] = Nullsv;
3578 }
3579 }
a0d0e21e 3580 }
54310121 3581 else {
3582 AV *av = newAV(); /* Will be @_ */
3583 av_extend(av, 0);
3584 av_store(comppad, 0, (SV*)av);
3585 AvFLAGS(av) = AVf_REIFY;
79072805 3586
93965878 3587 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3588 if (SvIMMORTAL(curpad[ix]))
3589 continue;
3590 if (!SvPADMY(curpad[ix]))
3591 SvPADTMP_on(curpad[ix]);
3592 }
3593 }
79072805 3594
a0d0e21e 3595 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3596 CvSTART(cv) = LINKLIST(CvROOT(cv));
3597 CvROOT(cv)->op_next = 0;
3598 peep(CvSTART(cv));
93a17b20 3599
44a8e56a 3600 if (name) {
3601 char *s;
3602
84902520 3603 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3604 SV *sv = NEWSV(0,0);
44a8e56a 3605 SV *tmpstr = sv_newmortal();
549bb64a 3606 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3607 CV *cv;
3608 HV *hv;
3609
51790459
MB		 3610 sv_setpvf(sv, "%_:%ld-%ld",
3611 GvSV(curcop->cop_filegv),
3612 (long)subline, (long)curcop->cop_line);
44a8e56a 3613 gv_efullname3(tmpstr, gv, Nullch);
3614 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3615 hv = GvHVn(db_postponed);
9607fc9c 3616 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3617 && (cv = GvCV(db_postponed))) {
44a8e56a 3618 dSP;
924508f0 3619 PUSHMARK(SP);
44a8e56a 3620 XPUSHs(tmpstr);
3621 PUTBACK;
3622 perl_call_sv((SV*)cv, G_DISCARD);
3623 }
3624 }
79072805 3625
44a8e56a 3626 if ((s = strrchr(name,':')))
28757baa 3627 s++;
3628 else
3629 s = name;
68dc0745 3630 if (strEQ(s, "BEGIN")) {
2ae324a7 3631 I32 oldscope = scopestack_ix;
28757baa 3632 ENTER;
3633 SAVESPTR(compiling.cop_filegv);
3634 SAVEI16(compiling.cop_line);
28757baa 3635 save_svref(&rs);
3636 sv_setsv(rs, nrs);
3637
3638 if (!beginav)
3639 beginav = newAV();
3640 DEBUG_x( dump_sub(gv) );
3641 av_push(beginav, (SV *)cv);
3642 GvCV(gv) = 0;
68dc0745 3643 call_list(oldscope, beginav);
a6006777 3644
28757baa 3645 curcop = &compiling;
3646 LEAVE;
3647 }
3648 else if (strEQ(s, "END") && !error_count) {
3649 if (!endav)
3650 endav = newAV();
3651 av_unshift(endav, 1);
3652 av_store(endav, 0, (SV *)cv);
3653 GvCV(gv) = 0;
3654 }
7d07dbc2
MB		 3655 else if (strEQ(s, "INIT") && !error_count) {
3656 if (!initav)
3657 initav = newAV();
3658 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3659 }
79072805 3660 }
a6006777 3661
aa689395 3662 done:
79072805 3663 copline = NOLINE;
8990e307 3664 LEAVE_SCOPE(floor);
a0d0e21e 3665 return cv;
79072805
LW		 3666}
3667
5476c433
JD		 3668void
3669newCONSTSUB(HV *stash, char *name, SV *sv)
3670{
3671 dTHR;
3672 U32 oldhints = hints;
3673 HV *old_cop_stash = curcop->cop_stash;
3674 HV *old_curstash = curstash;
3675 line_t oldline = curcop->cop_line;
3676 curcop->cop_line = copline;
3677
3678 hints &= ~HINT_BLOCK_SCOPE;
3679 if(stash)
3680 curstash = curcop->cop_stash = stash;
3681
3682 newSUB(
be24f278 3683 start_subparse(FALSE, 0),
5476c433
JD		 3684 newSVOP(OP_CONST, 0, newSVpv(name,0)),
3685 newSVOP(OP_CONST, 0, &sv_no), /* SvPV(&sv_no) == "" -- GMB */
3686 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
3687 );
3688
3689 hints = oldhints;
3690 curcop->cop_stash = old_cop_stash;
3691 curstash = old_curstash;
3692 curcop->cop_line = oldline;
3693}
3694
57d3b86d 3695CV *
e3b8966e 3696newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename)
a0d0e21e 3697{
11343788 3698 dTHR;
44a8e56a 3699 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3700 register CV *cv;
44a8e56a 3701
3702 if (cv = (name ? GvCV(gv) : Nullcv)) {
3703 if (GvCVGEN(gv)) {
3704 /* just a cached method */
3705 SvREFCNT_dec(cv);
3706 cv = 0;
3707 }
3708 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3709 /* already defined (or promised) */
2f34f9d4
IZ		 3710 if (dowarn && !(CvGV(cv) && GvSTASH(CvGV(cv))
3711 && HvNAME(GvSTASH(CvGV(cv)))
3712 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
a0d0e21e 3713 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3714 curcop->cop_line = copline;
3715 warn("Subroutine %s redefined",name);
3716 curcop->cop_line = oldline;
3717 }
3718 SvREFCNT_dec(cv);
3719 cv = 0;
79072805 3720 }
79072805 3721 }
44a8e56a 3722
3723 if (cv) /* must reuse cv if autoloaded */
3724 cv_undef(cv);
a0d0e21e
LW		 3725 else {
3726 cv = (CV*)NEWSV(1105,0);
3727 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3728 if (name) {
3729 GvCV(gv) = cv;
3730 GvCVGEN(gv) = 0;
3731 sub_generation++;
3732 }
a0d0e21e 3733 }
5196be3e 3734 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3735#ifdef USE_THREADS
12ca11f6 3736 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3737 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3738 CvOWNER(cv) = 0;
3739#endif /* USE_THREADS */
79072805 3740 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3741 CvXSUB(cv) = subaddr;
44a8e56a 3742
28757baa 3743 if (name) {
3744 char *s = strrchr(name,':');
3745 if (s)
3746 s++;
3747 else
3748 s = name;
3749 if (strEQ(s, "BEGIN")) {
3750 if (!beginav)
3751 beginav = newAV();
44a8e56a 3752 av_push(beginav, (SV *)cv);
3753 GvCV(gv) = 0;
28757baa 3754 }
3755 else if (strEQ(s, "END")) {
3756 if (!endav)
3757 endav = newAV();
3758 av_unshift(endav, 1);
44a8e56a 3759 av_store(endav, 0, (SV *)cv);
3760 GvCV(gv) = 0;
28757baa 3761 }
7d07dbc2
MB		 3762 else if (strEQ(s, "INIT")) {
3763 if (!initav)
3764 initav = newAV();
3765 av_push(initav, (SV *)cv);
ae77835f 3766 }
28757baa 3767 }
8990e307 3768 else
a5f75d66 3769 CvANON_on(cv);
44a8e56a 3770
a0d0e21e 3771 return cv;
79072805
LW		 3772}
3773
3774void
8ac85365 3775newFORM(I32 floor, OP *o, OP *block)
79072805 3776{
11343788 3777 dTHR;
79072805
LW		 3778 register CV *cv;
3779 char *name;
3780 GV *gv;
a0d0e21e 3781 I32 ix;
79072805 3782
11343788
MB		 3783 if (o)
3784 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3785 else
3786 name = "STDOUT";
85e6fe83 3787 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3788 GvMULTI_on(gv);
79072805
LW		 3789 if (cv = GvFORM(gv)) {
3790 if (dowarn) {
3791 line_t oldline = curcop->cop_line;
3792
3793 curcop->cop_line = copline;
3794 warn("Format %s redefined",name);
3795 curcop->cop_line = oldline;
3796 }
8990e307 3797 SvREFCNT_dec(cv);
79072805 3798 }
748a9306 3799 cv = compcv;
79072805 3800 GvFORM(gv) = cv;
44a8e56a 3801 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3802 CvFILEGV(cv) = curcop->cop_filegv;
3803
93965878 3804 for (ix = AvFILLp(comppad); ix > 0; ix--) {
44a8e56a 3805 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3806 SvPADTMP_on(curpad[ix]);
3807 }
3808
79072805
LW		 3809 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3810 CvSTART(cv) = LINKLIST(CvROOT(cv));
3811 CvROOT(cv)->op_next = 0;
3812 peep(CvSTART(cv));
11343788 3813 op_free(o);
79072805 3814 copline = NOLINE;
8990e307 3815 LEAVE_SCOPE(floor);
79072805
LW		 3816}
3817
3818OP *
8ac85365 3819newANONLIST(OP *o)
79072805 3820{
93a17b20 3821 return newUNOP(OP_REFGEN, 0,
11343788 3822 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3823}
3824
3825OP *
8ac85365 3826newANONHASH(OP *o)
79072805 3827{
93a17b20 3828 return newUNOP(OP_REFGEN, 0,
11343788 3829 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3830}
3831
3832OP *
8ac85365 3833newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3834{
3835 return newUNOP(OP_REFGEN, 0,
4633a7c4 3836 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3837}
3838
3839OP *
8ac85365 3840oopsAV(OP *o)
79072805 3841{
ed6116ce
LW		 3842 switch (o->op_type) {
3843 case OP_PADSV:
3844 o->op_type = OP_PADAV;
3845 o->op_ppaddr = ppaddr[OP_PADAV];
3846 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3847
3848 case OP_RV2SV:
79072805
LW		 3849 o->op_type = OP_RV2AV;
3850 o->op_ppaddr = ppaddr[OP_RV2AV];
3851 ref(o, OP_RV2AV);
ed6116ce
LW		 3852 break;
3853
3854 default:
79072805 3855 warn("oops: oopsAV");
ed6116ce
LW		 3856 break;
3857 }
79072805
LW		 3858 return o;
3859}
3860
3861OP *
8ac85365 3862oopsHV(OP *o)
79072805 3863{
ed6116ce
LW		 3864 switch (o->op_type) {
3865 case OP_PADSV:
3866 case OP_PADAV:
3867 o->op_type = OP_PADHV;
3868 o->op_ppaddr = ppaddr[OP_PADHV];
3869 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3870
3871 case OP_RV2SV:
3872 case OP_RV2AV:
79072805
LW		 3873 o->op_type = OP_RV2HV;
3874 o->op_ppaddr = ppaddr[OP_RV2HV];
3875 ref(o, OP_RV2HV);
ed6116ce
LW		 3876 break;
3877
3878 default:
79072805 3879 warn("oops: oopsHV");
ed6116ce
LW		 3880 break;
3881 }
79072805
LW		 3882 return o;
3883}
3884
3885OP *
8ac85365 3886newAVREF(OP *o)
79072805 3887{
ed6116ce
LW		 3888 if (o->op_type == OP_PADANY) {
3889 o->op_type = OP_PADAV;
3890 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3891 return o;
ed6116ce 3892 }
79072805
LW		 3893 return newUNOP(OP_RV2AV, 0, scalar(o));
3894}
3895
3896OP *
8ac85365 3897newGVREF(I32 type, OP *o)
79072805 3898{
a0d0e21e
LW		 3899 if (type == OP_MAPSTART)
3900 return newUNOP(OP_NULL, 0, o);
748a9306 3901 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3902}
3903
3904OP *
8ac85365 3905newHVREF(OP *o)
79072805 3906{
ed6116ce
LW		 3907 if (o->op_type == OP_PADANY) {
3908 o->op_type = OP_PADHV;
3909 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3910 return o;
ed6116ce 3911 }
79072805
LW		 3912 return newUNOP(OP_RV2HV, 0, scalar(o));
3913}
3914
3915OP *
8ac85365 3916oopsCV(OP *o)
79072805 3917{
463ee0b2 3918 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3919 /* STUB */
3920 return o;
3921}
3922
3923OP *
8ac85365 3924newCVREF(I32 flags, OP *o)
79072805 3925{
c07a80fd 3926 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3927}
3928
3929OP *
8ac85365 3930newSVREF(OP *o)
79072805 3931{
ed6116ce
LW		 3932 if (o->op_type == OP_PADANY) {
3933 o->op_type = OP_PADSV;
3934 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3935 return o;
ed6116ce 3936 }
224a4551
MB		 3937 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
3938 o->op_flags |= OPpDONE_SVREF;
a863c7d1 3939 return o;
224a4551 3940 }
79072805
LW		 3941 return newUNOP(OP_RV2SV, 0, scalar(o));
3942}
3943
3944/* Check routines. */
3945
3946OP *
8ac85365 3947ck_anoncode(OP *o)
5f05dabc 3948{
178c6305
CS		 3949 PADOFFSET ix;
3950 SV* name;
3951
3952 name = NEWSV(1106,0);
3953 sv_upgrade(name, SVt_PVNV);
3954 sv_setpvn(name, "&", 1);
3955 SvIVX(name) = -1;
3956 SvNVX(name) = 1;
5dc0d613 3957 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3958 av_store(comppad_name, ix, name);
5dc0d613
MB		 3959 av_store(comppad, ix, cSVOPo->op_sv);
3960 SvPADMY_on(cSVOPo->op_sv);
3961 cSVOPo->op_sv = Nullsv;
3962 cSVOPo->op_targ = ix;
3963 return o;
5f05dabc 3964}
3965
3966OP *
8ac85365 3967ck_bitop(OP *o)
55497cff 3968{
5dc0d613
MB		 3969 o->op_private = hints;
3970 return o;
55497cff 3971}
3972
3973OP *
8ac85365 3974ck_concat(OP *o)
79072805 3975{
11343788
MB		 3976 if (cUNOPo->op_first->op_type == OP_CONCAT)
3977 o->op_flags |= OPf_STACKED;
3978 return o;
79072805
LW		 3979}
3980
3981OP *
8ac85365 3982ck_spair(OP *o)
79072805 3983{
11343788 3984 if (o->op_flags & OPf_KIDS) {
79072805 3985 OP* newop;
a0d0e21e 3986 OP* kid;
5dc0d613
MB		 3987 OPCODE type = o->op_type;
3988 o = modkids(ck_fun(o), type);
11343788 3989 kid = cUNOPo->op_first;
a0d0e21e
LW		 3990 newop = kUNOP->op_first->op_sibling;
3991 if (newop &&
3992 (newop->op_sibling ||
3993 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3994 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3995 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3996
11343788 3997 return o;
a0d0e21e
LW		 3998 }
3999 op_free(kUNOP->op_first);
4000 kUNOP->op_first = newop;
4001 }
11343788
MB		 4002 o->op_ppaddr = ppaddr[++o->op_type];
4003 return ck_fun(o);
a0d0e21e
LW		 4004}
4005
4006OP *
8ac85365 4007ck_delete(OP *o)
a0d0e21e 4008{
11343788 4009 o = ck_fun(o);
5dc0d613 4010 o->op_private = 0;
11343788
MB		 4011 if (o->op_flags & OPf_KIDS) {
4012 OP *kid = cUNOPo->op_first;
5f05dabc 4013 if (kid->op_type == OP_HSLICE)
5dc0d613 4014 o->op_private |= OPpSLICE;
5f05dabc 4015 else if (kid->op_type != OP_HELEM)
4016 croak("%s argument is not a HASH element or slice",
5dc0d613 4017 op_desc[o->op_type]);
a0d0e21e 4018 null(kid);
79072805 4019 }
11343788 4020 return o;
79072805
LW		 4021}
4022
4023OP *
8ac85365 4024ck_eof(OP *o)
79072805 4025{
11343788 4026 I32 type = o->op_type;
79072805 4027
11343788
MB		 4028 if (o->op_flags & OPf_KIDS) {
4029 if (cLISTOPo->op_first->op_type == OP_STUB) {
4030 op_free(o);
4031 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4032 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4033 }
11343788 4034 return ck_fun(o);
79072805 4035 }
11343788 4036 return o;
79072805
LW		 4037}
4038
4039OP *
8ac85365 4040ck_eval(OP *o)
79072805 4041{
85e6fe83 4042 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4043 if (o->op_flags & OPf_KIDS) {
4044 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4045
93a17b20 4046 if (!kid) {
11343788
MB		 4047 o->op_flags &= ~OPf_KIDS;
4048 null(o);
79072805
LW		 4049 }
4050 else if (kid->op_type == OP_LINESEQ) {
4051 LOGOP *enter;
4052
11343788
MB		 4053 kid->op_next = o->op_next;
4054 cUNOPo->op_first = 0;
4055 op_free(o);
79072805
LW		 4056
4057 Newz(1101, enter, 1, LOGOP);
4058 enter->op_type = OP_ENTERTRY;
4059 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
4060 enter->op_private = 0;
4061
4062 /* establish postfix order */
4063 enter->op_next = (OP*)enter;
4064
11343788
MB		 4065 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4066 o->op_type = OP_LEAVETRY;
4067 o->op_ppaddr = ppaddr[OP_LEAVETRY];
4068 enter->op_other = o;
4069 return o;
79072805 4070 }
c7cc6f1c 4071 else
473986ff 4072 scalar((OP*)kid);
79072805
LW		 4073 }
4074 else {
11343788 4075 op_free(o);
54b9620d 4076 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4077 }
11343788
MB		 4078 o->op_targ = (PADOFFSET)hints;
4079 return o;
79072805
LW		 4080}
4081
4082OP *
8ac85365 4083ck_exec(OP *o)
79072805
LW		 4084{
4085 OP *kid;
11343788
MB		 4086 if (o->op_flags & OPf_STACKED) {
4087 o = ck_fun(o);
4088 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4089 if (kid->op_type == OP_RV2GV)
4090 null(kid);
79072805 4091 }
463ee0b2 4092 else
11343788
MB		 4093 o = listkids(o);
4094 return o;
79072805
LW		 4095}
4096
4097OP *
8ac85365 4098ck_exists(OP *o)
5f05dabc 4099{
5196be3e
MB		 4100 o = ck_fun(o);
4101 if (o->op_flags & OPf_KIDS) {
4102 OP *kid = cUNOPo->op_first;
5f05dabc 4103 if (kid->op_type != OP_HELEM)
5196be3e 4104 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 4105 null(kid);
4106 }
5196be3e 4107 return o;
5f05dabc 4108}
4109
4110OP *
8ac85365 4111ck_gvconst(register OP *o)
79072805
LW		 4112{
4113 o = fold_constants(o);
4114 if (o->op_type == OP_CONST)
4115 o->op_type = OP_GV;
4116 return o;
4117}
4118
4119OP *
8ac85365 4120ck_rvconst(register OP *o)
79072805 4121{
11343788
MB		 4122 dTHR;
4123 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4124
11343788 4125 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 4126 if (kid->op_type == OP_CONST) {
44a8e56a 4127 char *name;
4128 int iscv;
4129 GV *gv;
4130
4131 name = SvPV(kid->op_sv, na);
4132 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
4133 char *badthing = Nullch;
5dc0d613 4134 switch (o->op_type) {
44a8e56a 4135 case OP_RV2SV:
4136 badthing = "a SCALAR";
4137 break;
4138 case OP_RV2AV:
4139 badthing = "an ARRAY";
4140 break;
4141 case OP_RV2HV:
4142 badthing = "a HASH";
4143 break;
4144 }
4145 if (badthing)
4146 croak(
4147 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4148 name, badthing);
4149 }
93233ece
CS		 4150 /*
4151 * This is a little tricky. We only want to add the symbol if we
4152 * didn't add it in the lexer. Otherwise we get duplicate strict
4153 * warnings. But if we didn't add it in the lexer, we must at
4154 * least pretend like we wanted to add it even if it existed before,
4155 * or we get possible typo warnings. OPpCONST_ENTERED says
4156 * whether the lexer already added THIS instance of this symbol.
4157 */
5196be3e 4158 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4159 do {
44a8e56a 4160 gv = gv_fetchpv(name,
748a9306 4161 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4162 iscv
4163 ? SVt_PVCV
11343788 4164 : o->op_type == OP_RV2SV
a0d0e21e 4165 ? SVt_PV
11343788 4166 : o->op_type == OP_RV2AV
a0d0e21e 4167 ? SVt_PVAV
11343788 4168 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4169 ? SVt_PVHV
4170 : SVt_PVGV);
93233ece
CS		 4171 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4172 if (gv) {
4173 kid->op_type = OP_GV;
4174 SvREFCNT_dec(kid->op_sv);
4175 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4176 }
79072805 4177 }
11343788 4178 return o;
79072805
LW		 4179}
4180
4181OP *
8ac85365 4182ck_ftst(OP *o)
79072805 4183{
11343788
MB		 4184 dTHR;
4185 I32 type = o->op_type;
79072805 4186
11343788
MB		 4187 if (o->op_flags & OPf_REF)
4188 return o;
79072805 4189
108ed793 4190 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4191 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4192
4193 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4194 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 4195 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 4196 op_free(o);
79072805
LW		 4197 return newop;
4198 }
4199 }
4200 else {
11343788 4201 op_free(o);
79072805 4202 if (type == OP_FTTTY)
fb73857a 4203 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4204 SVt_PVIO));
79072805 4205 else
54b9620d 4206 return newUNOP(type, 0, newDEFSVOP());
79072805 4207 }
11343788 4208 return o;
79072805
LW		 4209}
4210
4211OP *
8ac85365 4212ck_fun(OP *o)
79072805 4213{
11343788 4214 dTHR;
79072805
LW		 4215 register OP *kid;
4216 OP **tokid;
4217 OP *sibl;
4218 I32 numargs = 0;
11343788 4219 int type = o->op_type;
a0d0e21e 4220 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4221
11343788 4222 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4223 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4224 oa &= ~OA_OPTIONAL;
4225 else
11343788 4226 return no_fh_allowed(o);
79072805
LW		 4227 }
4228
11343788
MB		 4229 if (o->op_flags & OPf_KIDS) {
4230 tokid = &cLISTOPo->op_first;
4231 kid = cLISTOPo->op_first;
8990e307
LW		 4232 if (kid->op_type == OP_PUSHMARK ||
4233 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4234 {
79072805
LW		 4235 tokid = &kid->op_sibling;
4236 kid = kid->op_sibling;
4237 }
a0d0e21e 4238 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4239 *tokid = kid = newDEFSVOP();
79072805
LW		 4240
4241 while (oa && kid) {
4242 numargs++;
4243 sibl = kid->op_sibling;
4244 switch (oa & 7) {
4245 case OA_SCALAR:
4246 scalar(kid);
4247 break;
4248 case OA_LIST:
4249 if (oa < 16) {
4250 kid = 0;
4251 continue;
4252 }
4253 else
4254 list(kid);
4255 break;
4256 case OA_AVREF:
4257 if (kid->op_type == OP_CONST &&
4258 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4259 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4260 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4261 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4262 if (dowarn)
ff0cee69 4263 warn("Array @%s missing the @ in argument %ld of %s()",
4264 name, (long)numargs, op_desc[type]);
79072805
LW		 4265 op_free(kid);
4266 kid = newop;
4267 kid->op_sibling = sibl;
4268 *tokid = kid;
4269 }
8990e307 4270 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4271 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4272 mod(kid, type);
79072805
LW		 4273 break;
4274 case OA_HVREF:
4275 if (kid->op_type == OP_CONST &&
4276 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4277 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4278 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4279 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4280 if (dowarn)
ff0cee69 4281 warn("Hash %%%s missing the %% in argument %ld of %s()",
4282 name, (long)numargs, op_desc[type]);
79072805
LW		 4283 op_free(kid);
4284 kid = newop;
4285 kid->op_sibling = sibl;
4286 *tokid = kid;
4287 }
8990e307 4288 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4289 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4290 mod(kid, type);
79072805
LW		 4291 break;
4292 case OA_CVREF:
4293 {
a0d0e21e 4294 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4295 kid->op_sibling = 0;
4296 linklist(kid);
4297 newop->op_next = newop;
4298 kid = newop;
4299 kid->op_sibling = sibl;
4300 *tokid = kid;
4301 }
4302 break;
4303 case OA_FILEREF:
4304 if (kid->op_type != OP_GV) {
4305 if (kid->op_type == OP_CONST &&
4306 (kid->op_private & OPpCONST_BARE)) {
4307 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4308 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4309 SVt_PVIO) );
79072805
LW		 4310 op_free(kid);
4311 kid = newop;
4312 }
4313 else {
4314 kid->op_sibling = 0;
4315 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4316 }
4317 kid->op_sibling = sibl;
4318 *tokid = kid;
4319 }
4320 scalar(kid);
4321 break;
4322 case OA_SCALARREF:
a0d0e21e 4323 mod(scalar(kid), type);
79072805
LW		 4324 break;
4325 }
4326 oa >>= 4;
4327 tokid = &kid->op_sibling;
4328 kid = kid->op_sibling;
4329 }
11343788 4330 o->op_private |= numargs;
79072805 4331 if (kid)
11343788
MB		 4332 return too_many_arguments(o,op_desc[o->op_type]);
4333 listkids(o);
79072805 4334 }
a0d0e21e 4335 else if (opargs[type] & OA_DEFGV) {
11343788 4336 op_free(o);
54b9620d 4337 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4338 }
4339
79072805
LW		 4340 if (oa) {
4341 while (oa & OA_OPTIONAL)
4342 oa >>= 4;
4343 if (oa && oa != OA_LIST)
11343788 4344 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4345 }
11343788 4346 return o;
79072805
LW		 4347}
4348
4349OP *
8ac85365 4350ck_glob(OP *o)
79072805 4351{
fb73857a 4352 GV *gv;
4353
1f2bfc8a 4354 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4355 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4356
4357 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4358 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4359
4360 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4361 static int glob_index;
4362
5196be3e 4363 append_elem(OP_GLOB, o,
46fc3d4c 4364 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4365 o->op_type = OP_LIST;
4366 o->op_ppaddr = ppaddr[OP_LIST];
4367 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4368 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4369 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4370 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4371 scalar(newUNOP(OP_RV2CV, 0,
4372 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4373 o = newUNOP(OP_NULL, 0, ck_subr(o));
4374 o->op_targ = OP_GLOB; /* hint at what it used to be */
4375 return o;
b1cb66bf 4376 }
4377 gv = newGVgen("main");
a0d0e21e 4378 gv_IOadd(gv);
11343788
MB		 4379 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4380 scalarkids(o);
4381 return ck_fun(o);
79072805
LW		 4382}
4383
4384OP *
8ac85365 4385ck_grep(OP *o)
79072805
LW		 4386{
4387 LOGOP *gwop;
4388 OP *kid;
11343788 4389 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4390
11343788 4391 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4392 Newz(1101, gwop, 1, LOGOP);
aeea060c 4393
11343788 4394 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4395 OP* k;
11343788
MB		 4396 o = ck_sort(o);
4397 kid = cLISTOPo->op_first->op_sibling;
4398 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4399 kid = k;
4400 }
4401 kid->op_next = (OP*)gwop;
11343788 4402 o->op_flags &= ~OPf_STACKED;
93a17b20 4403 }
11343788 4404 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4405 if (type == OP_MAPWHILE)
4406 list(kid);
4407 else
4408 scalar(kid);
11343788 4409 o = ck_fun(o);
79072805 4410 if (error_count)
11343788 4411 return o;
aeea060c 4412 kid = cLISTOPo->op_first->op_sibling;
79072805 4413 if (kid->op_type != OP_NULL)
463ee0b2 4414 croak("panic: ck_grep");
79072805
LW		 4415 kid = kUNOP->op_first;
4416
a0d0e21e
LW		 4417 gwop->op_type = type;
4418 gwop->op_ppaddr = ppaddr[type];
11343788 4419 gwop->op_first = listkids(o);
79072805
LW		 4420 gwop->op_flags |= OPf_KIDS;
4421 gwop->op_private = 1;
4422 gwop->op_other = LINKLIST(kid);
a0d0e21e 4423 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4424 kid->op_next = (OP*)gwop;
4425
11343788 4426 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4427 if (!kid || !kid->op_sibling)
11343788 4428 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4429 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4430 mod(kid, OP_GREPSTART);
4431
79072805
LW		 4432 return (OP*)gwop;
4433}
4434
4435OP *
8ac85365 4436ck_index(OP *o)
79072805 4437{
11343788
MB		 4438 if (o->op_flags & OPf_KIDS) {
4439 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4440 if (kid && kid->op_type == OP_CONST)
2779dcf1 4441 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4442 }
11343788 4443 return ck_fun(o);
79072805
LW		 4444}
4445
4446OP *
8ac85365 4447ck_lengthconst(OP *o)
79072805
LW		 4448{
4449 /* XXX length optimization goes here */
11343788 4450 return ck_fun(o);
79072805
LW		 4451}
4452
4453OP *
8ac85365 4454ck_lfun(OP *o)
79072805 4455{
5dc0d613
MB		 4456 OPCODE type = o->op_type;
4457 return modkids(ck_fun(o), type);
79072805
LW		 4458}
4459
4460OP *
8ac85365 4461ck_rfun(OP *o)
8990e307 4462{
5dc0d613
MB		 4463 OPCODE type = o->op_type;
4464 return refkids(ck_fun(o), type);
8990e307
LW		 4465}
4466
4467OP *
8ac85365 4468ck_listiob(OP *o)
79072805
LW		 4469{
4470 register OP *kid;
aeea060c 4471
11343788 4472 kid = cLISTOPo->op_first;
79072805 4473 if (!kid) {
11343788
MB		 4474 o = force_list(o);
4475 kid = cLISTOPo->op_first;
79072805
LW		 4476 }
4477 if (kid->op_type == OP_PUSHMARK)
4478 kid = kid->op_sibling;
11343788 4479 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4480 kid = kid->op_sibling;
4481 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4482 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4483 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4484 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4485 cLISTOPo->op_first->op_sibling = kid;
4486 cLISTOPo->op_last = kid;
79072805
LW		 4487 kid = kid->op_sibling;
4488 }
4489 }
4490
4491 if (!kid)
54b9620d 4492 append_elem(o->op_type, o, newDEFSVOP());
79072805 4493
5dc0d613 4494 o = listkids(o);
bbce6d69 4495
5dc0d613 4496 o->op_private = 0;
36477c24 4497#ifdef USE_LOCALE
bbce6d69 4498 if (hints & HINT_LOCALE)
5dc0d613 4499 o->op_private |= OPpLOCALE;
bbce6d69 4500#endif
4501
5dc0d613 4502 return o;
bbce6d69 4503}
4504
4505OP *
8ac85365 4506ck_fun_locale(OP *o)
bbce6d69 4507{
5dc0d613 4508 o = ck_fun(o);
bbce6d69 4509
5dc0d613 4510 o->op_private = 0;
36477c24 4511#ifdef USE_LOCALE
bbce6d69 4512 if (hints & HINT_LOCALE)
5dc0d613 4513 o->op_private |= OPpLOCALE;
bbce6d69 4514#endif
4515
5dc0d613 4516 return o;
bbce6d69 4517}
4518
4519OP *
8ac85365 4520ck_scmp(OP *o)
bbce6d69 4521{
5dc0d613 4522 o->op_private = 0;
36477c24 4523#ifdef USE_LOCALE
bbce6d69 4524 if (hints & HINT_LOCALE)
5dc0d613 4525 o->op_private |= OPpLOCALE;
bbce6d69 4526#endif
36477c24 4527
5dc0d613 4528 return o;
79072805
LW		 4529}
4530
4531OP *
8ac85365 4532ck_match(OP *o)
79072805 4533{
5dc0d613 4534 o->op_private |= OPpRUNTIME;
11343788 4535 return o;
79072805
LW		 4536}
4537
4538OP *
8ac85365 4539ck_null(OP *o)
79072805 4540{
11343788 4541 return o;
79072805
LW		 4542}
4543
4544OP *
8ac85365 4545ck_repeat(OP *o)
79072805 4546{
11343788
MB		 4547 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4548 o->op_private |= OPpREPEAT_DOLIST;
4549 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4550 }
4551 else
11343788
MB		 4552 scalar(o);
4553 return o;
79072805
LW		 4554}
4555
4556OP *
8ac85365 4557ck_require(OP *o)
8990e307 4558{
11343788
MB		 4559 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4560 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4561
4562 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4563 char *s;
a0d0e21e
LW		 4564 for (s = SvPVX(kid->op_sv); *s; s++) {
4565 if (*s == ':' && s[1] == ':') {
4566 *s = '/';
1aef975c 4567 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4568 --SvCUR(kid->op_sv);
4569 }
8990e307 4570 }
a0d0e21e 4571 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4572 }
4573 }
11343788 4574 return ck_fun(o);
8990e307
LW		 4575}
4576
4577OP *
8ac85365 4578ck_retarget(OP *o)
79072805 4579{
463ee0b2 4580 croak("NOT IMPL LINE %d",__LINE__);
79072805 4581 /* STUB */
11343788 4582 return o;
79072805
LW		 4583}
4584
4585OP *
8ac85365 4586ck_select(OP *o)
79072805 4587{
c07a80fd 4588 OP* kid;
11343788
MB		 4589 if (o->op_flags & OPf_KIDS) {
4590 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4591 if (kid && kid->op_sibling) {
11343788
MB		 4592 o->op_type = OP_SSELECT;
4593 o->op_ppaddr = ppaddr[OP_SSELECT];
4594 o = ck_fun(o);
4595 return fold_constants(o);
79072805
LW		 4596 }
4597 }
11343788
MB		 4598 o = ck_fun(o);
4599 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4600 if (kid && kid->op_type == OP_RV2GV)
4601 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4602 return o;
79072805
LW		 4603}
4604
4605OP *
8ac85365 4606ck_shift(OP *o)
79072805 4607{
11343788 4608 I32 type = o->op_type;
79072805 4609
11343788 4610 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4611 OP *argop;
4612
11343788 4613 op_free(o);
6d4ff0d2 4614#ifdef USE_THREADS
977336f5 4615 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4616 argop = newOP(OP_PADAV, OPf_REF);
4617 argop->op_targ = 0; /* curpad[0] is @_ */
4618 }
4619 else {
4620 argop = newUNOP(OP_RV2AV, 0,
4621 scalar(newGVOP(OP_GV, 0,
4622 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4623 }
4624#else
4625 argop = newUNOP(OP_RV2AV, 0,
977336f5 4626 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4627 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4628#endif /* USE_THREADS */
4629 return newUNOP(type, 0, scalar(argop));
79072805 4630 }
11343788 4631 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4632}
4633
4634OP *
8ac85365 4635ck_sort(OP *o)
79072805 4636{
5dc0d613 4637 o->op_private = 0;
36477c24 4638#ifdef USE_LOCALE
bbce6d69 4639 if (hints & HINT_LOCALE)
5dc0d613 4640 o->op_private |= OPpLOCALE;
bbce6d69 4641#endif
4642
11343788
MB		 4643 if (o->op_flags & OPf_STACKED) {
4644 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4645 OP *k;
4646 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4647
463ee0b2 4648 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4649 linklist(kid);
463ee0b2
LW		 4650 if (kid->op_type == OP_SCOPE) {
4651 k = kid->op_next;
4652 kid->op_next = 0;
79072805 4653 }
463ee0b2 4654 else if (kid->op_type == OP_LEAVE) {
11343788 4655 if (o->op_type == OP_SORT) {
748a9306
LW		 4656 null(kid); /* wipe out leave */
4657 kid->op_next = kid;
463ee0b2 4658
748a9306
LW		 4659 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4660 if (k->op_next == kid)
4661 k->op_next = 0;
4662 }
463ee0b2 4663 }
748a9306
LW		 4664 else
4665 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4666 k = kLISTOP->op_first;
463ee0b2 4667 }
a0d0e21e
LW		 4668 peep(k);
4669
11343788 4670 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4671 null(kid); /* wipe out rv2gv */
11343788 4672 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4673 kid->op_next = kid;
4674 else
4675 kid->op_next = k;
11343788 4676 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4677 }
4678 }
bbce6d69 4679
11343788 4680 return o;
79072805
LW		 4681}
4682
4683OP *
8ac85365 4684ck_split(OP *o)
79072805
LW		 4685{
4686 register OP *kid;
aeea060c 4687
11343788
MB		 4688 if (o->op_flags & OPf_STACKED)
4689 return no_fh_allowed(o);
79072805 4690
11343788 4691 kid = cLISTOPo->op_first;
8990e307 4692 if (kid->op_type != OP_NULL)
463ee0b2 4693 croak("panic: ck_split");
8990e307 4694 kid = kid->op_sibling;
11343788
MB		 4695 op_free(cLISTOPo->op_first);
4696 cLISTOPo->op_first = kid;
85e6fe83 4697 if (!kid) {
11343788
MB		 4698 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4699 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4700 }
79072805
LW		 4701
4702 if (kid->op_type != OP_MATCH) {
4703 OP *sibl = kid->op_sibling;
463ee0b2 4704 kid->op_sibling = 0;
79072805 4705 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4706 if (cLISTOPo->op_first == cLISTOPo->op_last)
4707 cLISTOPo->op_last = kid;
4708 cLISTOPo->op_first = kid;
79072805
LW		 4709 kid->op_sibling = sibl;
4710 }
4711
4712 kid->op_type = OP_PUSHRE;
4713 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4714 scalar(kid);
4715
4716 if (!kid->op_sibling)
54b9620d 4717 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4718
4719 kid = kid->op_sibling;
4720 scalar(kid);
4721
4722 if (!kid->op_sibling)
11343788 4723 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4724
4725 kid = kid->op_sibling;
4726 scalar(kid);
4727
4728 if (kid->op_sibling)
11343788 4729 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4730
11343788 4731 return o;
79072805
LW		 4732}
4733
4734OP *
8ac85365 4735ck_subr(OP *o)
79072805 4736{
11343788
MB		 4737 dTHR;
4738 OP *prev = ((cUNOPo->op_first->op_sibling)
4739 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4740 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4741 OP *cvop;
4742 char *proto = 0;
4743 CV *cv = 0;
46fc3d4c 4744 GV *namegv = 0;
4633a7c4
LW		 4745 int optional = 0;
4746 I32 arg = 0;
4747
11343788 4748 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4749 if (cvop->op_type == OP_RV2CV) {
4750 SVOP* tmpop;
11343788 4751 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4752 null(cvop); /* disable rv2cv */
4753 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4754 if (tmpop->op_type == OP_GV) {
8ebc5c01 4755 cv = GvCVu(tmpop->op_sv);
5dc0d613 4756 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4757 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4758 proto = SvPV((SV*)cv, na);
4759 }
4633a7c4
LW		 4760 }
4761 }
11343788 4762 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4763 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4764 o->op_private |= OPpENTERSUB_DB;
4765 while (o2 != cvop) {
4633a7c4
LW		 4766 if (proto) {
4767 switch (*proto) {
4768 case '\0':
5dc0d613 4769 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4770 case ';':
4771 optional = 1;
4772 proto++;
4773 continue;
4774 case '$':
4775 proto++;
4776 arg++;
11343788 4777 scalar(o2);
4633a7c4
LW		 4778 break;
4779 case '%':
4780 case '@':
11343788 4781 list(o2);
4633a7c4
LW		 4782 arg++;
4783 break;
4784 case '&':
4785 proto++;
4786 arg++;
11343788 4787 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4788 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4789 break;
4790 case '*':
4791 proto++;
4792 arg++;
11343788 4793 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4794 goto wrapref;
4795 {
11343788 4796 OP* kid = o2;
69dcf70c 4797 OP* sib = kid->op_sibling;
4633a7c4 4798 kid->op_sibling = 0;
69dcf70c
MB		 4799 o2 = newUNOP(OP_RV2GV, 0, kid);
4800 o2->op_sibling = sib;
6fa846a0 4801 prev->op_sibling = o2;
4633a7c4
LW		 4802 }
4803 goto wrapref;
4804 case '\\':
4805 proto++;
4806 arg++;
4807 switch (*proto++) {
4808 case '*':
11343788 4809 if (o2->op_type != OP_RV2GV)
5dc0d613 4810 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4811 goto wrapref;
4812 case '&':
11343788 4813 if (o2->op_type != OP_RV2CV)
5dc0d613 4814 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4815 goto wrapref;
4816 case '$':
11343788 4817 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4818 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4819 goto wrapref;
4820 case '@':
11343788 4821 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4822 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4823 goto wrapref;
4824 case '%':
11343788 4825 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4826 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4827 wrapref:
4828 {
11343788 4829 OP* kid = o2;
6fa846a0 4830 OP* sib = kid->op_sibling;
4633a7c4 4831 kid->op_sibling = 0;
6fa846a0
GS		 4832 o2 = newUNOP(OP_REFGEN, 0, kid);
4833 o2->op_sibling = sib;
e858de61 4834 prev->op_sibling = o2;
4633a7c4
LW		 4835 }
4836 break;
4837 default: goto oops;
4838 }
4839 break;
b1cb66bf 4840 case ' ':
4841 proto++;
4842 continue;
4633a7c4
LW		 4843 default:
4844 oops:
4845 croak("Malformed prototype for %s: %s",
46fc3d4c 4846 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4847 }
4848 }
4849 else
11343788
MB		 4850 list(o2);
4851 mod(o2, OP_ENTERSUB);
4852 prev = o2;
4853 o2 = o2->op_sibling;
4633a7c4 4854 }
fb73857a 4855 if (proto && !optional &&
4856 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4857 return too_few_arguments(o, gv_ename(namegv));
11343788 4858 return o;
79072805
LW		 4859}
4860
4861OP *
8ac85365 4862ck_svconst(OP *o)
8990e307 4863{
11343788
MB		 4864 SvREADONLY_on(cSVOPo->op_sv);
4865 return o;
8990e307
LW		 4866}
4867
4868OP *
8ac85365 4869ck_trunc(OP *o)
79072805 4870{
11343788
MB		 4871 if (o->op_flags & OPf_KIDS) {
4872 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4873
a0d0e21e
LW		 4874 if (kid->op_type == OP_NULL)
4875 kid = (SVOP*)kid->op_sibling;
4876 if (kid &&
4877 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4878 o->op_flags |= OPf_SPECIAL;
79072805 4879 }
11343788 4880 return ck_fun(o);
79072805
LW		 4881}
4882
463ee0b2
LW		 4883/* A peephole optimizer. We visit the ops in the order they're to execute. */
4884
79072805 4885void
8ac85365 4886peep(register OP *o)
79072805 4887{
11343788 4888 dTHR;
79072805 4889 register OP* oldop = 0;
a0d0e21e 4890 if (!o || o->op_seq)
79072805 4891 return;
a0d0e21e 4892 ENTER;
462e5cf6 4893 SAVEOP();
a0d0e21e
LW		 4894 SAVESPTR(curcop);
4895 for (; o; o = o->op_next) {
4896 if (o->op_seq)
4897 break;
c07a80fd 4898 if (!op_seqmax)
4899 op_seqmax++;
a0d0e21e
LW		 4900 op = o;
4901 switch (o->op_type) {
4902 case OP_NEXTSTATE:
4903 case OP_DBSTATE:
4904 curcop = ((COP*)o); /* for warnings */
c07a80fd 4905 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4906 break;
4907
4908 case OP_CONCAT:
4909 case OP_CONST:
4910 case OP_JOIN:
4911 case OP_UC:
4912 case OP_UCFIRST:
4913 case OP_LC:
4914 case OP_LCFIRST:
4915 case OP_QUOTEMETA:
3c4f770c 4916 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4917 null(o->op_next);
c07a80fd 4918 o->op_seq = op_seqmax++;
a0d0e21e 4919 break;
8990e307 4920 case OP_STUB:
54310121 4921 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4922 o->op_seq = op_seqmax++;
54310121 4923 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4924 }
748a9306 4925 goto nothin;
79072805 4926 case OP_NULL:
748a9306 4927 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
7766148a 4928 curcop = ((COP*)o);
748a9306 4929 goto nothin;
79072805 4930 case OP_SCALAR:
93a17b20 4931 case OP_LINESEQ:
463ee0b2 4932 case OP_SCOPE:
748a9306 4933 nothin:
a0d0e21e
LW		 4934 if (oldop && o->op_next) {
4935 oldop->op_next = o->op_next;
79072805
LW		 4936 continue;
4937 }
c07a80fd 4938 o->op_seq = op_seqmax++;
79072805
LW		 4939 break;
4940
4941 case OP_GV:
a0d0e21e 4942 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4943 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4944 null(o->op_next);
4945 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4946 o->op_next = o->op_next->op_next;
4947 o->op_type = OP_GVSV;
4948 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4949 }
4950 }
a0d0e21e
LW		 4951 else if (o->op_next->op_type == OP_RV2AV) {
4952 OP* pop = o->op_next->op_next;
4953 IV i;
8990e307 4954 if (pop->op_type == OP_CONST &&
e858de61 4955 (op = pop->op_next) &&
8990e307 4956 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4957 !(pop->op_next->op_private &
68dc0745 4958 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4959 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4960 <= 255 &&
8990e307
LW		 4961 i >= 0)
4962 {
748a9306 4963 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4964 null(o->op_next);
8990e307
LW		 4965 null(pop->op_next);
4966 null(pop);
a0d0e21e
LW		 4967 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4968 o->op_next = pop->op_next->op_next;
4969 o->op_type = OP_AELEMFAST;
4970 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4971 o->op_private = (U8)i;
a6006777 4972 GvAVn(((GVOP*)o)->op_gv);
8990e307 4973 }
79072805 4974 }
c07a80fd 4975 o->op_seq = op_seqmax++;
79072805
LW		 4976 break;
4977
af41f3ca
MB		 4978 case OP_PADAV:
4979 if (o->op_next->op_type == OP_RV2AV
49e9fbe6 4980 && (o->op_next->op_flags & OPf_REF))
af41f3ca
MB		 4981 {
4982 null(o->op_next);
4983 o->op_next = o->op_next->op_next;
4984 }
4985 break;
aeea060c 4986
af41f3ca
MB		 4987 case OP_PADHV:
4988 if (o->op_next->op_type == OP_RV2HV
49e9fbe6 4989 && (o->op_next->op_flags & OPf_REF))
af41f3ca
MB		 4990 {
4991 null(o->op_next);
4992 o->op_next = o->op_next->op_next;
4993 }
4994 break;
4995
a0d0e21e 4996 case OP_MAPWHILE:
79072805
LW		 4997 case OP_GREPWHILE:
4998 case OP_AND:
4999 case OP_OR:
c07a80fd 5000 o->op_seq = op_seqmax++;
fd4d1407
IZ		 5001 while (cLOGOP->op_other->op_type == OP_NULL)
5002 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5003 peep(cLOGOP->op_other);
5004 break;
5005
5006 case OP_COND_EXPR:
c07a80fd 5007 o->op_seq = op_seqmax++;
79072805
LW		 5008 peep(cCONDOP->op_true);
5009 peep(cCONDOP->op_false);
5010 break;
5011
5012 case OP_ENTERLOOP:
c07a80fd 5013 o->op_seq = op_seqmax++;
79072805
LW		 5014 peep(cLOOP->op_redoop);
5015 peep(cLOOP->op_nextop);
5016 peep(cLOOP->op_lastop);
5017 break;
5018
5019 case OP_MATCH:
5020 case OP_SUBST:
c07a80fd 5021 o->op_seq = op_seqmax++;
a0d0e21e 5022 peep(cPMOP->op_pmreplstart);
79072805
LW		 5023 break;
5024
a0d0e21e 5025 case OP_EXEC:
c07a80fd 5026 o->op_seq = op_seqmax++;
a0d0e21e
LW		 5027 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
5028 if (o->op_next->op_sibling &&
20408e3c
GS		 5029 o->op_next->op_sibling->op_type != OP_EXIT &&
5030 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e
LW		 5031 o->op_next->op_sibling->op_type != OP_DIE) {
5032 line_t oldline = curcop->cop_line;
5033
5034 curcop->cop_line = ((COP*)o->op_next)->cop_line;
5035 warn("Statement unlikely to be reached");
5036 warn("(Maybe you meant system() when you said exec()?)\n");
5037 curcop->cop_line = oldline;
5038 }
5039 }
5040 break;
aeea060c 5041
c750a3ec
MB		 5042 case OP_HELEM: {
5043 UNOP *rop;
5044 SV *lexname;
5045 GV **fields;
5046 SV **svp, **indsvp;
5047 I32 ind;
5048 char *key;
5049 STRLEN keylen;
aeea060c 5050
c750a3ec
MB		 5051 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
5052 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5053 break;
5054 rop = (UNOP*)((BINOP*)o)->op_first;
5055 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5056 break;
5057 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
5058 if (!SvOBJECT(lexname))
5059 break;
5196be3e 5060 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5061 if (!fields || !GvHV(*fields))
5062 break;
5063 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5064 key = SvPV(*svp, keylen);
5065 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5066 if (!indsvp) {
5067 croak("No such field \"%s\" in variable %s of type %s",
5068 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
5069 }
5070 ind = SvIV(*indsvp);
5071 if (ind < 1)
5072 croak("Bad index while coercing array into hash");
5073 rop->op_type = OP_RV2AV;
5074 rop->op_ppaddr = ppaddr[OP_RV2AV];
5075 o->op_type = OP_AELEM;
5076 o->op_ppaddr = ppaddr[OP_AELEM];
5077 SvREFCNT_dec(*svp);
5078 *svp = newSViv(ind);
5079 break;
5080 }
5081
79072805 5082 default:
c07a80fd 5083 o->op_seq = op_seqmax++;
79072805
LW		 5084 break;
5085 }
a0d0e21e 5086 oldop = o;
79072805 5087 }
a0d0e21e 5088 LEAVE;
79072805 5089}
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