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[win32] another 'old' patch
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
e50aee73 21/*
5dc0d613 22 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 23 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 24 */
11343788 25#define CHECKOP(type,o) \
28757baa 26 ((op_mask && op_mask[type]) \
5dc0d613 27 ? ( op_free((OP*)o), \
28757baa 28 croak("%s trapped by operation mask", op_desc[type]), \
29 Nullop ) \
11343788 30 : (*check[type])((OP*)o))
e50aee73 31
11343788 32static I32 list_assignment _((OP *o));
3bc5dc61 33static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 34static OP *modkids _((OP *o, I32 type));
35static OP *no_fh_allowed _((OP *o));
5dc0d613 36static bool scalar_mod_type _((OP *o, I32 type));
11343788
MB		 37static OP *scalarboolean _((OP *o));
38static OP *too_few_arguments _((OP *o, char* name));
39static OP *too_many_arguments _((OP *o, char* name));
40static void null _((OP* o));
bbce6d69 41static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
748a9306 42 CV* startcv, I32 cx_ix));
54b9620d 43static OP *newDEFSVOP _((void));
883ffac3 44static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
79072805 45
4633a7c4 46static char*
8ac85365 47gv_ename(GV *gv)
4633a7c4
LW		 48{
49 SV* tmpsv = sv_newmortal();
46fc3d4c 50 gv_efullname3(tmpsv, gv, Nullch);
4633a7c4
LW		 51 return SvPV(tmpsv,na);
52}
53
8990e307 54static OP *
8ac85365 55no_fh_allowed(OP *o)
79072805 56{
46fc3d4c 57 yyerror(form("Missing comma after first argument to %s function",
5196be3e 58 op_desc[o->op_type]));
11343788 59 return o;
79072805
LW		 60}
61
8990e307 62static OP *
8ac85365 63too_few_arguments(OP *o, char *name)
79072805 64{
46fc3d4c 65 yyerror(form("Not enough arguments for %s", name));
11343788 66 return o;
79072805
LW		 67}
68
8990e307 69static OP *
8ac85365 70too_many_arguments(OP *o, char *name)
79072805 71{
46fc3d4c 72 yyerror(form("Too many arguments for %s", name));
11343788 73 return o;
79072805
LW		 74}
75
3bc5dc61 76static void
8ac85365 77bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 78{
46fc3d4c 79 yyerror(form("Type of arg %d to %s must be %s (not %s)",
80 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 81}
82
a0d0e21e 83void
8ac85365 84assertref(OP *o)
a0d0e21e 85{
11343788 86 int type = o->op_type;
a0d0e21e 87 if (type != OP_AELEM && type != OP_HELEM) {
46fc3d4c 88 yyerror(form("Can't use subscript on %s", op_desc[type]));
8ebc5c01 89 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV)
748a9306 90 warn("(Did you mean $ or @ instead of %c?)\n",
8ebc5c01 91 type == OP_ENTERSUB ? '&' : '%');
a0d0e21e
LW		 92 }
93}
94
79072805
LW		 95/* "register" allocation */
96
97PADOFFSET
8ac85365 98pad_allocmy(char *name)
93a17b20 99{
11343788 100 dTHR;
a0d0e21e
LW		 101 PADOFFSET off;
102 SV *sv;
103
104 if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) {
46fc3d4c 105 if (!isPRINT(name[1])) {
106 name[3] = '\0';
107 name[2] = toCTRL(name[1]);
108 name[1] = '^';
109 }
a0d0e21e
LW		 110 croak("Can't use global %s in \"my\"",name);
111 }
93965878 112 if (dowarn && AvFILLp(comppad_name) >= 0) {
b1cb66bf 113 SV **svp = AvARRAY(comppad_name);
93965878 114 for (off = AvFILLp(comppad_name); off > comppad_name_floor; off--) {
b1cb66bf 115 if ((sv = svp[off])
116 && sv != &sv_undef
117 && SvIVX(sv) == 999999999 /* var is in open scope */
118 && strEQ(name, SvPVX(sv)))
119 {
120 warn("\"my\" variable %s masks earlier declaration in same scope", name);
121 break;
122 }
123 }
124 }
a0d0e21e
LW		 125 off = pad_alloc(OP_PADSV, SVs_PADMY);
126 sv = NEWSV(1102,0);
93a17b20
LW		 127 sv_upgrade(sv, SVt_PVNV);
128 sv_setpv(sv, name);
c750a3ec
MB		 129 if (in_my_stash) {
130 if (*name != '$')
131 croak("Can't declare class for non-scalar %s in \"my\"",name);
132 SvOBJECT_on(sv);
133 (void)SvUPGRADE(sv, SVt_PVMG);
134 SvSTASH(sv) = (HV*)SvREFCNT_inc(in_my_stash);
135 sv_objcount++;
136 }
8990e307 137 av_store(comppad_name, off, sv);
748a9306 138 SvNVX(sv) = (double)999999999;
8990e307
LW		 139 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
140 if (!min_intro_pending)
141 min_intro_pending = off;
142 max_intro_pending = off;
93a17b20 143 if (*name == '@')
463ee0b2 144 av_store(comppad, off, (SV*)newAV());
93a17b20 145 else if (*name == '%')
463ee0b2 146 av_store(comppad, off, (SV*)newHV());
ed6116ce 147 SvPADMY_on(curpad[off]);
93a17b20
LW		 148 return off;
149}
150
748a9306 151static PADOFFSET
bbce6d69 152pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix)
93a17b20 153{
11343788 154 dTHR;
748a9306 155 CV *cv;
93a17b20
LW		 156 I32 off;
157 SV *sv;
93a17b20 158 register I32 i;
c09156bb 159 register PERL_CONTEXT *cx;
a0d0e21e 160 int saweval;
93a17b20 161
748a9306 162 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 163 AV *curlist = CvPADLIST(cv);
164 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 165 AV *curname;
4fdae800 166
748a9306 167 if (!svp || *svp == &sv_undef)
4633a7c4 168 continue;
748a9306
LW		 169 curname = (AV*)*svp;
170 svp = AvARRAY(curname);
93965878 171 for (off = AvFILLp(curname); off > 0; off--) {
748a9306
LW		 172 if ((sv = svp[off]) &&
173 sv != &sv_undef &&
174 seq <= SvIVX(sv) &&
13826f2c 175 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 176 strEQ(SvPVX(sv), name))
177 {
5f05dabc 178 I32 depth;
179 AV *oldpad;
180 SV *oldsv;
181
182 depth = CvDEPTH(cv);
183 if (!depth) {
9607fc9c 184 if (newoff) {
185 if (SvFAKE(sv))
186 continue;
4fdae800 187 return 0; /* don't clone from inactive stack frame */
9607fc9c 188 }
5f05dabc 189 depth = 1;
190 }
191 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
192 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 193 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 194 SV *namesv = NEWSV(1103,0);
748a9306 195 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 196 sv_upgrade(namesv, SVt_PVNV);
197 sv_setpv(namesv, name);
198 av_store(comppad_name, newoff, namesv);
199 SvNVX(namesv) = (double)curcop->cop_seq;
200 SvIVX(namesv) = 999999999; /* A ref, intro immediately */
201 SvFAKE_on(namesv); /* A ref, not a real var */
774d564b 202 if (CvANON(compcv) || SvTYPE(compcv) == SVt_PVFM) {
28757baa 203 /* "It's closures all the way down." */
204 CvCLONE_on(compcv);
54310121 205 if (cv == startcv) {
206 if (CvANON(compcv))
207 oldsv = Nullsv; /* no need to keep ref */
208 }
209 else {
28757baa 210 CV *bcv;
211 for (bcv = startcv;
212 bcv && bcv != cv && !CvCLONE(bcv);
213 bcv = CvOUTSIDE(bcv)) {
214 if (CvANON(bcv))
215 CvCLONE_on(bcv);
216 else {
774d564b 217 if (dowarn && !CvUNIQUE(cv))
44a8e56a 218 warn(
219 "Variable \"%s\" may be unavailable",
28757baa 220 name);
221 break;
222 }
223 }
224 }
225 }
44a8e56a 226 else if (!CvUNIQUE(compcv)) {
9607fc9c 227 if (dowarn && !SvFAKE(sv) && !CvUNIQUE(cv))
44a8e56a 228 warn("Variable \"%s\" will not stay shared", name);
5f05dabc 229 }
748a9306 230 }
199100c8 231 av_store(comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 232 return newoff;
233 }
93a17b20
LW		 234 }
235 }
236
237 /* Nothing in current lexical context--try eval's context, if any.
238 * This is necessary to let the perldb get at lexically scoped variables.
239 * XXX This will also probably interact badly with eval tree caching.
240 */
241
a0d0e21e 242 saweval = 0;
748a9306 243 for (i = cx_ix; i >= 0; i--) {
93a17b20
LW		 244 cx = &cxstack[i];
245 switch (cx->cx_type) {
246 default:
748a9306
LW		 247 if (i == 0 && saweval) {
248 seq = cxstack[saweval].blk_oldcop->cop_seq;
249 return pad_findlex(name, newoff, seq, main_cv, 0);
250 }
93a17b20
LW		 251 break;
252 case CXt_EVAL:
44a8e56a 253 switch (cx->blk_eval.old_op_type) {
254 case OP_ENTEREVAL:
255 saweval = i;
256 break;
257 case OP_REQUIRE:
258 /* require must have its own scope */
259 return 0;
260 }
93a17b20
LW		 261 break;
262 case CXt_SUB:
263 if (!saweval)
264 return 0;
265 cv = cx->blk_sub.cv;
748a9306
LW		 266 if (debstash && CvSTASH(cv) == debstash) { /* ignore DB'* scope */
267 saweval = i; /* so we know where we were called from */
93a17b20 268 continue;
93a17b20 269 }
748a9306
LW		 270 seq = cxstack[saweval].blk_oldcop->cop_seq;
271 return pad_findlex(name, newoff, seq, cv, i-1);
93a17b20
LW		 272 }
273 }
274
748a9306
LW		 275 return 0;
276}
a0d0e21e 277
748a9306 278PADOFFSET
8ac85365 279pad_findmy(char *name)
748a9306 280{
11343788 281 dTHR;
748a9306 282 I32 off;
54310121 283 I32 pendoff = 0;
748a9306
LW		 284 SV *sv;
285 SV **svp = AvARRAY(comppad_name);
bbce6d69 286 U32 seq = cop_seqmax;
748a9306 287
11343788
MB		 288#ifdef USE_THREADS
289 /*
290 * Special case to get lexical (and hence per-thread) @_.
291 * XXX I need to find out how to tell at parse-time whether use
292 * of @_ should refer to a lexical (from a sub) or defgv (global
293 * scope and maybe weird sub-ish things like formats). See
294 * startsub in perly.y. It's possible that @_ could be lexical
295 * (at least from subs) even in non-threaded perl.
296 */
297 if (strEQ(name, "@_"))
298 return 0; /* success. (NOT_IN_PAD indicates failure) */
299#endif /* USE_THREADS */
300
748a9306 301 /* The one we're looking for is probably just before comppad_name_fill. */
93965878 302 for (off = AvFILLp(comppad_name); off > 0; off--) {
a0d0e21e
LW		 303 if ((sv = svp[off]) &&
304 sv != &sv_undef &&
54310121 305 (!SvIVX(sv) ||
306 (seq <= SvIVX(sv) &&
307 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 308 strEQ(SvPVX(sv), name))
309 {
54310121 310 if (SvIVX(sv))
311 return (PADOFFSET)off;
312 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 313 }
314 }
748a9306
LW		 315
316 /* See if it's in a nested scope */
317 off = pad_findlex(name, 0, seq, CvOUTSIDE(compcv), cxstack_ix);
54310121 318 if (off) {
319 /* If there is a pending local definition, this new alias must die */
320 if (pendoff)
321 SvIVX(AvARRAY(comppad_name)[off]) = seq;
11343788 322 return off; /* pad_findlex returns 0 for failure...*/
54310121 323 }
11343788 324 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 325}
326
327void
8ac85365 328pad_leavemy(I32 fill)
93a17b20
LW		 329{
330 I32 off;
8990e307 331 SV **svp = AvARRAY(comppad_name);
93a17b20 332 SV *sv;
8990e307
LW		 333 if (min_intro_pending && fill < min_intro_pending) {
334 for (off = max_intro_pending; off >= min_intro_pending; off--) {
a0d0e21e 335 if ((sv = svp[off]) && sv != &sv_undef)
8990e307
LW		 336 warn("%s never introduced", SvPVX(sv));
337 }
338 }
339 /* "Deintroduce" my variables that are leaving with this scope. */
93965878 340 for (off = AvFILLp(comppad_name); off > fill; off--) {
748a9306 341 if ((sv = svp[off]) && sv != &sv_undef && SvIVX(sv) == 999999999)
463ee0b2 342 SvIVX(sv) = cop_seqmax;
93a17b20
LW		 343 }
344}
345
346PADOFFSET
8ac85365 347pad_alloc(I32 optype, U32 tmptype)
79072805 348{
11343788 349 dTHR;
79072805
LW		 350 SV *sv;
351 I32 retval;
352
353 if (AvARRAY(comppad) != curpad)
463ee0b2 354 croak("panic: pad_alloc");
a0d0e21e
LW		 355 if (pad_reset_pending)
356 pad_reset();
ed6116ce 357 if (tmptype & SVs_PADMY) {
79072805 358 do {
93965878 359 sv = *av_fetch(comppad, AvFILLp(comppad) + 1, TRUE);
ed6116ce 360 } while (SvPADBUSY(sv)); /* need a fresh one */
93965878 361 retval = AvFILLp(comppad);
79072805
LW		 362 }
363 else {
bbce6d69 364 SV **names = AvARRAY(comppad_name);
93965878 365 SSize_t names_fill = AvFILLp(comppad_name);
bbce6d69 366 for (;;) {
367 /*
368 * "foreach" index vars temporarily become aliases to non-"my"
369 * values. Thus we must skip, not just pad values that are
370 * marked as current pad values, but also those with names.
371 */
372 if (++padix <= names_fill &&
373 (sv = names[padix]) && sv != &sv_undef)
374 continue;
375 sv = *av_fetch(comppad, padix, TRUE);
376 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
377 break;
378 }
79072805
LW		 379 retval = padix;
380 }
8990e307 381 SvFLAGS(sv) |= tmptype;
79072805 382 curpad = AvARRAY(comppad);
11343788 383#ifdef USE_THREADS
5dc0d613
MB		 384 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
385 (unsigned long) thr, (unsigned long) curpad,
386 (long) retval, op_name[optype]));
11343788 387#else
d9bb4600
GS		 388 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
389 (unsigned long) curpad,
5dc0d613 390 (long) retval, op_name[optype]));
11343788 391#endif /* USE_THREADS */
79072805
LW		 392 return (PADOFFSET)retval;
393}
394
395SV *
8990e307 396pad_sv(PADOFFSET po)
79072805 397{
11343788
MB		 398 dTHR;
399#ifdef USE_THREADS
5dc0d613
MB		 400 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
401 (unsigned long) thr, (unsigned long) curpad, po));
11343788 402#else
79072805 403 if (!po)
463ee0b2 404 croak("panic: pad_sv po");
d9bb4600
GS		 405 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
406 (unsigned long) curpad, po));
11343788 407#endif /* USE_THREADS */
79072805
LW		 408 return curpad[po]; /* eventually we'll turn this into a macro */
409}
410
411void
8990e307 412pad_free(PADOFFSET po)
79072805 413{
11343788 414 dTHR;
a0d0e21e
LW		 415 if (!curpad)
416 return;
79072805 417 if (AvARRAY(comppad) != curpad)
463ee0b2 418 croak("panic: pad_free curpad");
79072805 419 if (!po)
463ee0b2 420 croak("panic: pad_free po");
11343788 421#ifdef USE_THREADS
5dc0d613
MB		 422 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
423 (unsigned long) thr, (unsigned long) curpad, po));
11343788 424#else
d9bb4600
GS		 425 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
426 (unsigned long) curpad, po));
11343788 427#endif /* USE_THREADS */
a0d0e21e 428 if (curpad[po] && curpad[po] != &sv_undef)
ed6116ce 429 SvPADTMP_off(curpad[po]);
a0d0e21e 430 if ((I32)po < padix)
79072805
LW		 431 padix = po - 1;
432}
433
434void
8990e307 435pad_swipe(PADOFFSET po)
79072805 436{
11343788 437 dTHR;
79072805 438 if (AvARRAY(comppad) != curpad)
463ee0b2 439 croak("panic: pad_swipe curpad");
79072805 440 if (!po)
463ee0b2 441 croak("panic: pad_swipe po");
11343788 442#ifdef USE_THREADS
5dc0d613
MB		 443 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
444 (unsigned long) thr, (unsigned long) curpad, po));
11343788 445#else
d9bb4600
GS		 446 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
447 (unsigned long) curpad, po));
11343788 448#endif /* USE_THREADS */
ed6116ce 449 SvPADTMP_off(curpad[po]);
a0d0e21e
LW		 450 curpad[po] = NEWSV(1107,0);
451 SvPADTMP_on(curpad[po]);
452 if ((I32)po < padix)
79072805
LW		 453 padix = po - 1;
454}
455
d9bb4600
GS		 456/* XXX pad_reset() is currently disabled because it results in serious bugs.
457 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
458 * on the stack by OPs that use them, there are several ways to get an alias
459 * to a shared TARG. Such an alias will change randomly and unpredictably.
460 * We avoid doing this until we can think of a Better Way.
461 * GSAR 97-10-29 */
79072805 462void
8ac85365 463pad_reset(void)
79072805 464{
d9bb4600 465#ifdef USE_BROKEN_PAD_RESET
11343788 466 dTHR;
79072805
LW		 467 register I32 po;
468
469 if (AvARRAY(comppad) != curpad)
463ee0b2 470 croak("panic: pad_reset curpad");
11343788 471#ifdef USE_THREADS
5dc0d613
MB		 472 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
473 (unsigned long) thr, (unsigned long) curpad));
11343788 474#else
d9bb4600
GS		 475 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
476 (unsigned long) curpad));
11343788 477#endif /* USE_THREADS */
748a9306
LW		 478 if (!tainting) { /* Can't mix tainted and non-tainted temporaries. */
479 for (po = AvMAX(comppad); po > padix_floor; po--) {
ff0cee69 480 if (curpad[po] && !SvIMMORTAL(curpad[po]))
748a9306
LW		 481 SvPADTMP_off(curpad[po]);
482 }
483 padix = padix_floor;
79072805 484 }
d9bb4600 485#endif
a0d0e21e 486 pad_reset_pending = FALSE;
79072805
LW		 487}
488
a863c7d1 489#ifdef USE_THREADS
54b9620d 490/* find_threadsv is not reentrant */
a863c7d1 491PADOFFSET
54b9620d 492find_threadsv(char *name)
a863c7d1
MB		 493{
494 dTHR;
495 char *p;
496 PADOFFSET key;
554b3eca 497 SV **svp;
54b9620d
MB		 498 /* We currently only handle names of a single character */
499 p = strchr(threadsv_names, *name);
a863c7d1
MB		 500 if (!p)
501 return NOT_IN_PAD;
54b9620d
MB		 502 key = p - threadsv_names;
503 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 504 if (!svp) {
505 SV *sv = NEWSV(0, 0);
54b9620d 506 av_store(thr->threadsv, key, sv);
940cb80d 507 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 508 /*
509 * Some magic variables used to be automagically initialised
510 * in gv_fetchpv. Those which are now per-thread magicals get
511 * initialised here instead.
512 */
513 switch (*name) {
54b9620d
MB		 514 case '_':
515 break;
554b3eca
MB		 516 case ';':
517 sv_setpv(sv, "\034");
54b9620d 518 sv_magic(sv, 0, 0, name, 1);
554b3eca 519 break;
c277df42
IZ		 520 case '&':
521 case '`':
522 case '\'':
523 sawampersand = TRUE;
524 SvREADONLY_on(sv);
d8b5173a 525 /* FALL THROUGH */
54b9620d
MB		 526 default:
527 sv_magic(sv, 0, 0, name, 1);
554b3eca 528 }
a863c7d1 529 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
54b9620d 530 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 531 sv, (*name < 32) ? "^" : "",
532 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 533 }
534 return key;
535}
536#endif /* USE_THREADS */
537
79072805
LW		 538/* Destructor */
539
540void
8ac85365 541op_free(OP *o)
79072805 542{
85e6fe83 543 register OP *kid, *nextkid;
79072805 544
5dc0d613 545 if (!o || o->op_seq == (U16)-1)
79072805
LW		 546 return;
547
11343788
MB		 548 if (o->op_flags & OPf_KIDS) {
549 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 550 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 551 op_free(kid);
85e6fe83 552 }
79072805
LW		 553 }
554
11343788 555 switch (o->op_type) {
8990e307 556 case OP_NULL:
11343788 557 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 558 break;
a0d0e21e 559 case OP_ENTEREVAL:
11343788 560 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 561 break;
554b3eca 562#ifdef USE_THREADS
2faa37cc 563 case OP_THREADSV:
54b9620d 564 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 565 break;
566#endif /* USE_THREADS */
a6006777 567 default:
5196be3e 568 if (!(o->op_flags & OPf_REF) || (check[o->op_type] != ck_ftst))
a6006777 569 break;
570 /* FALL THROUGH */
463ee0b2 571 case OP_GVSV:
79072805 572 case OP_GV:
a6006777 573 case OP_AELEMFAST:
11343788 574 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 575 break;
576 case OP_NEXTSTATE:
577 case OP_DBSTATE:
5196be3e 578 Safefree(cCOPo->cop_label);
11343788 579 SvREFCNT_dec(cCOPo->cop_filegv);
79072805
LW		 580 break;
581 case OP_CONST:
11343788 582 SvREFCNT_dec(cSVOPo->op_sv);
79072805 583 break;
748a9306
LW		 584 case OP_GOTO:
585 case OP_NEXT:
586 case OP_LAST:
587 case OP_REDO:
11343788 588 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 589 break;
590 /* FALL THROUGH */
a0d0e21e 591 case OP_TRANS:
11343788 592 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 593 break;
594 case OP_SUBST:
11343788 595 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 596 /* FALL THROUGH */
748a9306 597 case OP_PUSHRE:
a0d0e21e 598 case OP_MATCH:
c277df42 599 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 600 break;
79072805
LW		 601 }
602
11343788
MB		 603 if (o->op_targ > 0)
604 pad_free(o->op_targ);
8990e307 605
11343788 606 Safefree(o);
79072805
LW		 607}
608
8990e307 609static void
8ac85365 610null(OP *o)
8990e307 611{
54b9620d 612 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 613 pad_free(o->op_targ);
614 o->op_targ = o->op_type;
615 o->op_type = OP_NULL;
616 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 617}
618
79072805
LW		 619/* Contextualizers */
620
463ee0b2 621#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 622
623OP *
8ac85365 624linklist(OP *o)
79072805
LW		 625{
626 register OP *kid;
627
11343788
MB		 628 if (o->op_next)
629 return o->op_next;
79072805
LW		 630
631 /* establish postfix order */
11343788
MB		 632 if (cUNOPo->op_first) {
633 o->op_next = LINKLIST(cUNOPo->op_first);
634 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 635 if (kid->op_sibling)
636 kid->op_next = LINKLIST(kid->op_sibling);
637 else
11343788 638 kid->op_next = o;
79072805
LW		 639 }
640 }
641 else
11343788 642 o->op_next = o;
79072805 643
11343788 644 return o->op_next;
79072805
LW		 645}
646
647OP *
8ac85365 648scalarkids(OP *o)
79072805
LW		 649{
650 OP *kid;
11343788
MB		 651 if (o && o->op_flags & OPf_KIDS) {
652 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 653 scalar(kid);
654 }
11343788 655 return o;
79072805
LW		 656}
657
a0d0e21e 658static OP *
8ac85365 659scalarboolean(OP *o)
8990e307
LW		 660{
661 if (dowarn &&
11343788 662 o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 663 dTHR;
a0d0e21e
LW		 664 line_t oldline = curcop->cop_line;
665
666 if (copline != NOLINE)
667 curcop->cop_line = copline;
668 warn("Found = in conditional, should be ==");
669 curcop->cop_line = oldline;
670 }
11343788 671 return scalar(o);
8990e307
LW		 672}
673
674OP *
8ac85365 675scalar(OP *o)
79072805
LW		 676{
677 OP *kid;
678
a0d0e21e 679 /* assumes no premature commitment */
5dc0d613
MB		 680 if (!o || (o->op_flags & OPf_WANT) || error_count
681 || o->op_type == OP_RETURN)
11343788 682 return o;
79072805 683
5dc0d613 684 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 685
11343788 686 switch (o->op_type) {
79072805 687 case OP_REPEAT:
11343788
MB		 688 if (o->op_private & OPpREPEAT_DOLIST)
689 null(((LISTOP*)cBINOPo->op_first)->op_first);
690 scalar(cBINOPo->op_first);
8990e307 691 break;
79072805
LW		 692 case OP_OR:
693 case OP_AND:
694 case OP_COND_EXPR:
11343788 695 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 696 scalar(kid);
79072805 697 break;
a0d0e21e 698 case OP_SPLIT:
11343788 699 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 700 if (!kPMOP->op_pmreplroot)
701 deprecate("implicit split to @_");
702 }
703 /* FALL THROUGH */
79072805
LW		 704 case OP_MATCH:
705 case OP_SUBST:
706 case OP_NULL:
8990e307 707 default:
11343788
MB		 708 if (o->op_flags & OPf_KIDS) {
709 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 710 scalar(kid);
711 }
79072805
LW		 712 break;
713 case OP_LEAVE:
714 case OP_LEAVETRY:
5dc0d613 715 kid = cLISTOPo->op_first;
54310121 716 scalar(kid);
717 while (kid = kid->op_sibling) {
718 if (kid->op_sibling)
719 scalarvoid(kid);
720 else
721 scalar(kid);
722 }
0f15f207 723 WITH_THR(curcop = &compiling);
54310121 724 break;
748a9306 725 case OP_SCOPE:
79072805 726 case OP_LINESEQ:
8990e307 727 case OP_LIST:
11343788 728 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 729 if (kid->op_sibling)
730 scalarvoid(kid);
731 else
732 scalar(kid);
733 }
0f15f207 734 WITH_THR(curcop = &compiling);
79072805
LW		 735 break;
736 }
11343788 737 return o;
79072805
LW		 738}
739
740OP *
8ac85365 741scalarvoid(OP *o)
79072805
LW		 742{
743 OP *kid;
8990e307
LW		 744 char* useless = 0;
745 SV* sv;
79072805 746
54310121 747 /* assumes no premature commitment */
5dc0d613
MB		 748 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || error_count
749 || o->op_type == OP_RETURN)
11343788 750 return o;
79072805 751
5dc0d613 752 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 753
11343788 754 switch (o->op_type) {
79072805 755 default:
11343788 756 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 757 break;
36477c24 758 /* FALL THROUGH */
759 case OP_REPEAT:
11343788 760 if (o->op_flags & OPf_STACKED)
8990e307
LW		 761 break;
762 /* FALL THROUGH */
763 case OP_GVSV:
764 case OP_WANTARRAY:
765 case OP_GV:
766 case OP_PADSV:
767 case OP_PADAV:
768 case OP_PADHV:
769 case OP_PADANY:
770 case OP_AV2ARYLEN:
8990e307 771 case OP_REF:
a0d0e21e
LW		 772 case OP_REFGEN:
773 case OP_SREFGEN:
8990e307
LW		 774 case OP_DEFINED:
775 case OP_HEX:
776 case OP_OCT:
777 case OP_LENGTH:
778 case OP_SUBSTR:
779 case OP_VEC:
780 case OP_INDEX:
781 case OP_RINDEX:
782 case OP_SPRINTF:
783 case OP_AELEM:
784 case OP_AELEMFAST:
785 case OP_ASLICE:
8990e307
LW		 786 case OP_HELEM:
787 case OP_HSLICE:
788 case OP_UNPACK:
789 case OP_PACK:
8990e307
LW		 790 case OP_JOIN:
791 case OP_LSLICE:
792 case OP_ANONLIST:
793 case OP_ANONHASH:
794 case OP_SORT:
795 case OP_REVERSE:
796 case OP_RANGE:
797 case OP_FLIP:
798 case OP_FLOP:
799 case OP_CALLER:
800 case OP_FILENO:
801 case OP_EOF:
802 case OP_TELL:
803 case OP_GETSOCKNAME:
804 case OP_GETPEERNAME:
805 case OP_READLINK:
806 case OP_TELLDIR:
807 case OP_GETPPID:
808 case OP_GETPGRP:
809 case OP_GETPRIORITY:
810 case OP_TIME:
811 case OP_TMS:
812 case OP_LOCALTIME:
813 case OP_GMTIME:
814 case OP_GHBYNAME:
815 case OP_GHBYADDR:
816 case OP_GHOSTENT:
817 case OP_GNBYNAME:
818 case OP_GNBYADDR:
819 case OP_GNETENT:
820 case OP_GPBYNAME:
821 case OP_GPBYNUMBER:
822 case OP_GPROTOENT:
823 case OP_GSBYNAME:
824 case OP_GSBYPORT:
825 case OP_GSERVENT:
826 case OP_GPWNAM:
827 case OP_GPWUID:
828 case OP_GGRNAM:
829 case OP_GGRGID:
830 case OP_GETLOGIN:
11343788
MB		 831 if (!(o->op_private & OPpLVAL_INTRO))
832 useless = op_desc[o->op_type];
8990e307
LW		 833 break;
834
835 case OP_RV2GV:
836 case OP_RV2SV:
837 case OP_RV2AV:
838 case OP_RV2HV:
11343788
MB		 839 if (!(o->op_private & OPpLVAL_INTRO) &&
840 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 841 useless = "a variable";
842 break;
79072805 843
93a17b20 844 case OP_NEXTSTATE:
8990e307 845 case OP_DBSTATE:
0f15f207 846 WITH_THR(curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 847 break;
848
79072805 849 case OP_CONST:
11343788 850 sv = cSVOPo->op_sv;
8990e307
LW		 851 if (dowarn) {
852 useless = "a constant";
853 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
854 useless = 0;
855 else if (SvPOK(sv)) {
856 if (strnEQ(SvPVX(sv), "di", 2) ||
a0d0e21e 857 strnEQ(SvPVX(sv), "ds", 2) ||
8990e307
LW		 858 strnEQ(SvPVX(sv), "ig", 2))
859 useless = 0;
860 }
861 }
11343788 862 null(o); /* don't execute a constant */
8990e307 863 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 864 break;
865
866 case OP_POSTINC:
11343788
MB		 867 o->op_type = OP_PREINC; /* pre-increment is faster */
868 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 869 break;
870
871 case OP_POSTDEC:
11343788
MB		 872 o->op_type = OP_PREDEC; /* pre-decrement is faster */
873 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 874 break;
875
79072805
LW		 876 case OP_OR:
877 case OP_AND:
878 case OP_COND_EXPR:
11343788 879 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 880 scalarvoid(kid);
881 break;
5aabfad6 882
a0d0e21e 883 case OP_NULL:
11343788 884 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
0f15f207 885 WITH_THR(curcop = ((COP*)o)); /* for warning below */
11343788 886 if (o->op_flags & OPf_STACKED)
a0d0e21e 887 break;
5aabfad6 888 /* FALL THROUGH */
79072805
LW		 889 case OP_ENTERTRY:
890 case OP_ENTER:
891 case OP_SCALAR:
11343788 892 if (!(o->op_flags & OPf_KIDS))
79072805 893 break;
54310121 894 /* FALL THROUGH */
463ee0b2 895 case OP_SCOPE:
79072805
LW		 896 case OP_LEAVE:
897 case OP_LEAVETRY:
a0d0e21e 898 case OP_LEAVELOOP:
79072805 899 case OP_LINESEQ:
79072805 900 case OP_LIST:
11343788 901 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 902 scalarvoid(kid);
903 break;
c90c0ff4 904 case OP_ENTEREVAL:
5196be3e 905 scalarkids(o);
c90c0ff4 906 break;
5aabfad6 907 case OP_REQUIRE:
c90c0ff4 908 /* all requires must return a boolean value */
5196be3e
MB		 909 o->op_flags &= ~OPf_WANT;
910 return scalar(o);
a0d0e21e 911 case OP_SPLIT:
11343788 912 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 913 if (!kPMOP->op_pmreplroot)
914 deprecate("implicit split to @_");
915 }
916 break;
79072805 917 }
8990e307
LW		 918 if (useless && dowarn)
919 warn("Useless use of %s in void context", useless);
11343788 920 return o;
79072805
LW		 921}
922
923OP *
8ac85365 924listkids(OP *o)
79072805
LW		 925{
926 OP *kid;
11343788
MB		 927 if (o && o->op_flags & OPf_KIDS) {
928 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 929 list(kid);
930 }
11343788 931 return o;
79072805
LW		 932}
933
934OP *
8ac85365 935list(OP *o)
79072805
LW		 936{
937 OP *kid;
938
a0d0e21e 939 /* assumes no premature commitment */
5dc0d613
MB		 940 if (!o || (o->op_flags & OPf_WANT) || error_count
941 || o->op_type == OP_RETURN)
11343788 942 return o;
79072805 943
5dc0d613 944 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 945
11343788 946 switch (o->op_type) {
79072805
LW		 947 case OP_FLOP:
948 case OP_REPEAT:
11343788 949 list(cBINOPo->op_first);
79072805
LW		 950 break;
951 case OP_OR:
952 case OP_AND:
953 case OP_COND_EXPR:
11343788 954 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 955 list(kid);
956 break;
957 default:
958 case OP_MATCH:
959 case OP_SUBST:
960 case OP_NULL:
11343788 961 if (!(o->op_flags & OPf_KIDS))
79072805 962 break;
11343788
MB		 963 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
964 list(cBINOPo->op_first);
965 return gen_constant_list(o);
79072805
LW		 966 }
967 case OP_LIST:
11343788 968 listkids(o);
79072805
LW		 969 break;
970 case OP_LEAVE:
971 case OP_LEAVETRY:
5dc0d613 972 kid = cLISTOPo->op_first;
54310121 973 list(kid);
974 while (kid = kid->op_sibling) {
975 if (kid->op_sibling)
976 scalarvoid(kid);
977 else
978 list(kid);
979 }
0f15f207 980 WITH_THR(curcop = &compiling);
54310121 981 break;
748a9306 982 case OP_SCOPE:
79072805 983 case OP_LINESEQ:
11343788 984 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 985 if (kid->op_sibling)
986 scalarvoid(kid);
987 else
988 list(kid);
989 }
0f15f207 990 WITH_THR(curcop = &compiling);
79072805 991 break;
c90c0ff4 992 case OP_REQUIRE:
993 /* all requires must return a boolean value */
5196be3e
MB		 994 o->op_flags &= ~OPf_WANT;
995 return scalar(o);
79072805 996 }
11343788 997 return o;
79072805
LW		 998}
999
1000OP *
8ac85365 1001scalarseq(OP *o)
79072805
LW		 1002{
1003 OP *kid;
1004
11343788
MB		 1005 if (o) {
1006 if (o->op_type == OP_LINESEQ ||
1007 o->op_type == OP_SCOPE ||
1008 o->op_type == OP_LEAVE ||
1009 o->op_type == OP_LEAVETRY)
463ee0b2 1010 {
0f15f207 1011 dTHR;
11343788 1012 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1013 if (kid->op_sibling) {
463ee0b2 1014 scalarvoid(kid);
ed6116ce 1015 }
463ee0b2
LW		 1016 }
1017 curcop = &compiling;
79072805 1018 }
11343788 1019 o->op_flags &= ~OPf_PARENS;
85e6fe83 1020 if (hints & HINT_BLOCK_SCOPE)
11343788 1021 o->op_flags |= OPf_PARENS;
79072805 1022 }
8990e307 1023 else
11343788
MB		 1024 o = newOP(OP_STUB, 0);
1025 return o;
79072805
LW		 1026}
1027
a0d0e21e 1028static OP *
8ac85365 1029modkids(OP *o, I32 type)
79072805
LW		 1030{
1031 OP *kid;
11343788
MB		 1032 if (o && o->op_flags & OPf_KIDS) {
1033 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1034 mod(kid, type);
79072805 1035 }
11343788 1036 return o;
79072805
LW		 1037}
1038
463ee0b2 1039static I32 modcount;
79072805
LW		 1040
1041OP *
8ac85365 1042mod(OP *o, I32 type)
79072805 1043{
11343788 1044 dTHR;
79072805
LW		 1045 OP *kid;
1046 SV *sv;
1047
11343788
MB		 1048 if (!o || error_count)
1049 return o;
79072805 1050
11343788 1051 switch (o->op_type) {
68dc0745 1052 case OP_UNDEF:
3e3baf6d 1053 modcount++;
5dc0d613 1054 return o;
a0d0e21e 1055 case OP_CONST:
11343788 1056 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e
LW		 1057 goto nomod;
1058 if (eval_start && eval_start->op_type == OP_CONST) {
1059 compiling.cop_arybase = (I32)SvIV(((SVOP*)eval_start)->op_sv);
1060 eval_start = 0;
1061 }
1062 else if (!type) {
1063 SAVEI32(compiling.cop_arybase);
748a9306 1064 compiling.cop_arybase = 0;
a0d0e21e
LW		 1065 }
1066 else if (type == OP_REFGEN)
1067 goto nomod;
1068 else
1069 croak("That use of $[ is unsupported");
1070 break;
5f05dabc 1071 case OP_STUB:
5196be3e 1072 if (o->op_flags & OPf_PARENS)
5f05dabc 1073 break;
1074 goto nomod;
a0d0e21e
LW		 1075 case OP_ENTERSUB:
1076 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1077 !(o->op_flags & OPf_STACKED)) {
1078 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1079 o->op_ppaddr = ppaddr[OP_RV2CV];
1080 assert(cUNOPo->op_first->op_type == OP_NULL);
1081 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1082 break;
1083 }
1084 /* FALL THROUGH */
1085 default:
a0d0e21e
LW		 1086 nomod:
1087 /* grep, foreach, subcalls, refgen */
1088 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1089 break;
46fc3d4c 1090 yyerror(form("Can't modify %s in %s",
5dc0d613 1091 op_desc[o->op_type],
46fc3d4c 1092 type ? op_desc[type] : "local"));
11343788 1093 return o;
79072805 1094
a0d0e21e
LW		 1095 case OP_PREINC:
1096 case OP_PREDEC:
1097 case OP_POW:
1098 case OP_MULTIPLY:
1099 case OP_DIVIDE:
1100 case OP_MODULO:
1101 case OP_REPEAT:
1102 case OP_ADD:
1103 case OP_SUBTRACT:
1104 case OP_CONCAT:
1105 case OP_LEFT_SHIFT:
1106 case OP_RIGHT_SHIFT:
1107 case OP_BIT_AND:
1108 case OP_BIT_XOR:
1109 case OP_BIT_OR:
1110 case OP_I_MULTIPLY:
1111 case OP_I_DIVIDE:
1112 case OP_I_MODULO:
1113 case OP_I_ADD:
1114 case OP_I_SUBTRACT:
11343788 1115 if (!(o->op_flags & OPf_STACKED))
a0d0e21e
LW		 1116 goto nomod;
1117 modcount++;
1118 break;
1119
79072805 1120 case OP_COND_EXPR:
11343788 1121 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1122 mod(kid, type);
79072805
LW		 1123 break;
1124
1125 case OP_RV2AV:
1126 case OP_RV2HV:
93af7a87 1127 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1128 croak("Can't localize through a reference");
11343788 1129 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
748a9306 1130 modcount = 10000;
11343788 1131 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1132 }
1133 /* FALL THROUGH */
79072805 1134 case OP_RV2GV:
5dc0d613 1135 if (scalar_mod_type(o, type))
3fe9a6f1 1136 goto nomod;
11343788 1137 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1138 /* FALL THROUGH */
1139 case OP_AASSIGN:
1140 case OP_ASLICE:
1141 case OP_HSLICE:
93a17b20
LW		 1142 case OP_NEXTSTATE:
1143 case OP_DBSTATE:
a0d0e21e
LW		 1144 case OP_REFGEN:
1145 case OP_CHOMP:
463ee0b2 1146 modcount = 10000;
79072805 1147 break;
463ee0b2 1148 case OP_RV2SV:
11343788 1149 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1150 croak("Can't localize through a reference");
aeea060c 1151 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1152 /* FALL THROUGH */
79072805 1153 case OP_GV:
463ee0b2 1154 case OP_AV2ARYLEN:
85aff577 1155 hints |= HINT_BLOCK_SCOPE;
463ee0b2 1156 case OP_SASSIGN:
8990e307
LW		 1157 case OP_AELEMFAST:
1158 modcount++;
1159 break;
1160
748a9306
LW		 1161 case OP_PADAV:
1162 case OP_PADHV:
1163 modcount = 10000;
5196be3e
MB		 1164 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1165 return o; /* Treat \(@foo) like ordinary list. */
1166 if (scalar_mod_type(o, type))
3fe9a6f1 1167 goto nomod;
748a9306
LW		 1168 /* FALL THROUGH */
1169 case OP_PADSV:
1170 modcount++;
1171 if (!type)
1172 croak("Can't localize lexical variable %s",
11343788 1173 SvPV(*av_fetch(comppad_name, o->op_targ, 4), na));
463ee0b2
LW		 1174 break;
1175
554b3eca 1176#ifdef USE_THREADS
2faa37cc 1177 case OP_THREADSV:
554b3eca 1178 modcount++; /* XXX ??? */
554b3eca
MB		 1179 break;
1180#endif /* USE_THREADS */
1181
748a9306
LW		 1182 case OP_PUSHMARK:
1183 break;
a0d0e21e 1184
69969c6f
SB		 1185 case OP_KEYS:
1186 if (type != OP_SASSIGN)
1187 goto nomod;
5f05dabc 1188 /* FALL THROUGH */
a0d0e21e 1189 case OP_POS:
463ee0b2 1190 case OP_VEC:
a0d0e21e 1191 case OP_SUBSTR:
11343788
MB		 1192 pad_free(o->op_targ);
1193 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1194 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1195 if (o->op_flags & OPf_KIDS)
1196 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1197 break;
a0d0e21e 1198
463ee0b2
LW		 1199 case OP_AELEM:
1200 case OP_HELEM:
11343788 1201 ref(cBINOPo->op_first, o->op_type);
68dc0745 1202 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1203 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1204 o->op_private |= OPpLVAL_DEFER;
a0d0e21e 1205 modcount++;
463ee0b2
LW		 1206 break;
1207
1208 case OP_SCOPE:
1209 case OP_LEAVE:
1210 case OP_ENTER:
11343788
MB		 1211 if (o->op_flags & OPf_KIDS)
1212 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1213 break;
1214
1215 case OP_NULL:
11343788 1216 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1217 break;
11343788
MB		 1218 if (o->op_targ != OP_LIST) {
1219 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1220 break;
1221 }
1222 /* FALL THROUGH */
463ee0b2 1223 case OP_LIST:
11343788 1224 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1225 mod(kid, type);
1226 break;
1227 }
11343788 1228 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1229
1230 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1231 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1232 else if (!type) {
11343788
MB		 1233 o->op_private |= OPpLVAL_INTRO;
1234 o->op_flags &= ~OPf_SPECIAL;
463ee0b2 1235 }
a0d0e21e 1236 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1237 o->op_flags |= OPf_REF;
1238 return o;
463ee0b2
LW		 1239}
1240
3fe9a6f1 1241static bool
8ac85365 1242scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1243{
1244 switch (type) {
1245 case OP_SASSIGN:
5196be3e 1246 if (o->op_type == OP_RV2GV)
3fe9a6f1 1247 return FALSE;
1248 /* FALL THROUGH */
1249 case OP_PREINC:
1250 case OP_PREDEC:
1251 case OP_POSTINC:
1252 case OP_POSTDEC:
1253 case OP_I_PREINC:
1254 case OP_I_PREDEC:
1255 case OP_I_POSTINC:
1256 case OP_I_POSTDEC:
1257 case OP_POW:
1258 case OP_MULTIPLY:
1259 case OP_DIVIDE:
1260 case OP_MODULO:
1261 case OP_REPEAT:
1262 case OP_ADD:
1263 case OP_SUBTRACT:
1264 case OP_I_MULTIPLY:
1265 case OP_I_DIVIDE:
1266 case OP_I_MODULO:
1267 case OP_I_ADD:
1268 case OP_I_SUBTRACT:
1269 case OP_LEFT_SHIFT:
1270 case OP_RIGHT_SHIFT:
1271 case OP_BIT_AND:
1272 case OP_BIT_XOR:
1273 case OP_BIT_OR:
1274 case OP_CONCAT:
1275 case OP_SUBST:
1276 case OP_TRANS:
1277 case OP_ANDASSIGN: /* may work later */
1278 case OP_ORASSIGN: /* may work later */
1279 return TRUE;
1280 default:
1281 return FALSE;
1282 }
1283}
1284
463ee0b2 1285OP *
8ac85365 1286refkids(OP *o, I32 type)
463ee0b2
LW		 1287{
1288 OP *kid;
11343788
MB		 1289 if (o && o->op_flags & OPf_KIDS) {
1290 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1291 ref(kid, type);
1292 }
11343788 1293 return o;
463ee0b2
LW		 1294}
1295
1296OP *
8ac85365 1297ref(OP *o, I32 type)
463ee0b2
LW		 1298{
1299 OP *kid;
463ee0b2 1300
11343788
MB		 1301 if (!o || error_count)
1302 return o;
463ee0b2 1303
11343788 1304 switch (o->op_type) {
a0d0e21e 1305 case OP_ENTERSUB:
e55aaa0e 1306 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1307 !(o->op_flags & OPf_STACKED)) {
1308 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1309 o->op_ppaddr = ppaddr[OP_RV2CV];
1310 assert(cUNOPo->op_first->op_type == OP_NULL);
1311 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1312 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1313 }
1314 break;
aeea060c 1315
463ee0b2 1316 case OP_COND_EXPR:
11343788 1317 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1318 ref(kid, type);
1319 break;
8990e307 1320 case OP_RV2SV:
11343788 1321 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1322 /* FALL THROUGH */
1323 case OP_PADSV:
5f05dabc 1324 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1325 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1326 : type == OP_RV2HV ? OPpDEREF_HV
1327 : OPpDEREF_SV);
11343788 1328 o->op_flags |= OPf_MOD;
a0d0e21e 1329 }
8990e307
LW		 1330 break;
1331
2faa37cc 1332 case OP_THREADSV:
a863c7d1
MB		 1333 o->op_flags |= OPf_MOD; /* XXX ??? */
1334 break;
1335
463ee0b2
LW		 1336 case OP_RV2AV:
1337 case OP_RV2HV:
aeea060c 1338 o->op_flags |= OPf_REF;
8990e307 1339 /* FALL THROUGH */
463ee0b2 1340 case OP_RV2GV:
11343788 1341 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1342 break;
8990e307 1343
463ee0b2
LW		 1344 case OP_PADAV:
1345 case OP_PADHV:
aeea060c 1346 o->op_flags |= OPf_REF;
79072805 1347 break;
aeea060c 1348
8990e307 1349 case OP_SCALAR:
79072805 1350 case OP_NULL:
11343788 1351 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1352 break;
11343788 1353 ref(cBINOPo->op_first, type);
79072805
LW		 1354 break;
1355 case OP_AELEM:
1356 case OP_HELEM:
11343788 1357 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1358 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1359 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1360 : type == OP_RV2HV ? OPpDEREF_HV
1361 : OPpDEREF_SV);
11343788 1362 o->op_flags |= OPf_MOD;
8990e307 1363 }
79072805
LW		 1364 break;
1365
463ee0b2 1366 case OP_SCOPE:
79072805
LW		 1367 case OP_LEAVE:
1368 case OP_ENTER:
8990e307 1369 case OP_LIST:
11343788 1370 if (!(o->op_flags & OPf_KIDS))
79072805 1371 break;
11343788 1372 ref(cLISTOPo->op_last, type);
79072805 1373 break;
a0d0e21e
LW		 1374 default:
1375 break;
79072805 1376 }
11343788 1377 return scalar(o);
8990e307 1378
79072805
LW		 1379}
1380
1381OP *
8ac85365 1382my(OP *o)
93a17b20
LW		 1383{
1384 OP *kid;
93a17b20
LW		 1385 I32 type;
1386
11343788
MB		 1387 if (!o || error_count)
1388 return o;
93a17b20 1389
11343788 1390 type = o->op_type;
93a17b20 1391 if (type == OP_LIST) {
11343788 1392 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20
LW		 1393 my(kid);
1394 }
1395 else if (type != OP_PADSV &&
1396 type != OP_PADAV &&
1397 type != OP_PADHV &&
1398 type != OP_PUSHMARK)
1399 {
5dc0d613 1400 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1401 return o;
93a17b20 1402 }
11343788
MB		 1403 o->op_flags |= OPf_MOD;
1404 o->op_private |= OPpLVAL_INTRO;
1405 return o;
93a17b20
LW		 1406}
1407
1408OP *
8ac85365 1409sawparens(OP *o)
79072805
LW		 1410{
1411 if (o)
1412 o->op_flags |= OPf_PARENS;
1413 return o;
1414}
1415
1416OP *
8ac85365 1417bind_match(I32 type, OP *left, OP *right)
79072805 1418{
11343788 1419 OP *o;
79072805 1420
2ae324a7 1421 if (dowarn &&
1422 (left->op_type == OP_RV2AV ||
1423 left->op_type == OP_RV2HV ||
1424 left->op_type == OP_PADAV ||
1425 left->op_type == OP_PADHV)) {
1426 char *desc = op_desc[(right->op_type == OP_SUBST ||
1427 right->op_type == OP_TRANS)
1428 ? right->op_type : OP_MATCH];
1429 char *sample = ((left->op_type == OP_RV2AV ||
1430 left->op_type == OP_PADAV)
1431 ? "@array" : "%hash");
1432 warn("Applying %s to %s will act on scalar(%s)", desc, sample, sample);
1433 }
1434
79072805
LW		 1435 if (right->op_type == OP_MATCH ||
1436 right->op_type == OP_SUBST ||
1437 right->op_type == OP_TRANS) {
1438 right->op_flags |= OPf_STACKED;
1439 if (right->op_type != OP_MATCH)
463ee0b2 1440 left = mod(left, right->op_type);
79072805 1441 if (right->op_type == OP_TRANS)
11343788 1442 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1443 else
11343788 1444 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1445 if (type == OP_NOT)
11343788
MB		 1446 return newUNOP(OP_NOT, 0, scalar(o));
1447 return o;
79072805
LW		 1448 }
1449 else
1450 return bind_match(type, left,
1451 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1452}
1453
1454OP *
8ac85365 1455invert(OP *o)
79072805 1456{
11343788
MB		 1457 if (!o)
1458 return o;
79072805 1459 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1460 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1461}
1462
1463OP *
8ac85365 1464scope(OP *o)
79072805
LW		 1465{
1466 if (o) {
84902520 1467 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || tainting) {
463ee0b2
LW		 1468 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1469 o->op_type = OP_LEAVE;
1470 o->op_ppaddr = ppaddr[OP_LEAVE];
1471 }
1472 else {
1473 if (o->op_type == OP_LINESEQ) {
1474 OP *kid;
1475 o->op_type = OP_SCOPE;
1476 o->op_ppaddr = ppaddr[OP_SCOPE];
1477 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1478 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1479 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1480 null(kid);
748a9306 1481 }
463ee0b2
LW		 1482 }
1483 else
748a9306 1484 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1485 }
79072805
LW		 1486 }
1487 return o;
1488}
1489
a0d0e21e 1490int
8ac85365 1491block_start(int full)
79072805 1492{
11343788 1493 dTHR;
a0d0e21e 1494 int retval = savestack_ix;
55497cff 1495 SAVEI32(comppad_name_floor);
1496 if (full) {
93965878 1497 if ((comppad_name_fill = AvFILLp(comppad_name)) > 0)
55497cff 1498 comppad_name_floor = comppad_name_fill;
1499 else
1500 comppad_name_floor = 0;
1501 }
1502 SAVEI32(min_intro_pending);
1503 SAVEI32(max_intro_pending);
a0d0e21e 1504 min_intro_pending = 0;
55497cff 1505 SAVEI32(comppad_name_fill);
1506 SAVEI32(padix_floor);
a0d0e21e
LW		 1507 padix_floor = padix;
1508 pad_reset_pending = FALSE;
55497cff 1509 SAVEI32(hints);
a0d0e21e
LW		 1510 hints &= ~HINT_BLOCK_SCOPE;
1511 return retval;
1512}
1513
1514OP*
8ac85365 1515block_end(I32 floor, OP *seq)
a0d0e21e 1516{
11343788 1517 dTHR;
a0d0e21e
LW		 1518 int needblockscope = hints & HINT_BLOCK_SCOPE;
1519 OP* retval = scalarseq(seq);
a0d0e21e
LW		 1520 LEAVE_SCOPE(floor);
1521 pad_reset_pending = FALSE;
1522 if (needblockscope)
1523 hints |= HINT_BLOCK_SCOPE; /* propagate out */
1524 pad_leavemy(comppad_name_fill);
bbce6d69 1525 cop_seqmax++;
a0d0e21e
LW		 1526 return retval;
1527}
1528
54b9620d
MB		 1529static OP *
1530newDEFSVOP(void)
1531{
1532#ifdef USE_THREADS
1533 OP *o = newOP(OP_THREADSV, 0);
1534 o->op_targ = find_threadsv("_");
1535 return o;
1536#else
1537 return newSVREF(newGVOP(OP_GV, 0, defgv));
1538#endif /* USE_THREADS */
1539}
1540
a0d0e21e 1541void
8ac85365 1542newPROG(OP *o)
a0d0e21e 1543{
11343788 1544 dTHR;
a0d0e21e 1545 if (in_eval) {
5dc0d613 1546 eval_root = newUNOP(OP_LEAVEEVAL, ((in_eval & 4) ? OPf_SPECIAL : 0), o);
a0d0e21e
LW		 1547 eval_start = linklist(eval_root);
1548 eval_root->op_next = 0;
1549 peep(eval_start);
1550 }
1551 else {
5dc0d613 1552 if (!o)
a0d0e21e 1553 return;
11343788 1554 main_root = scope(sawparens(scalarvoid(o)));
a0d0e21e
LW		 1555 curcop = &compiling;
1556 main_start = LINKLIST(main_root);
1557 main_root->op_next = 0;
1558 peep(main_start);
748a9306 1559 compcv = 0;
3841441e 1560
4fdae800 1561 /* Register with debugger */
84902520 1562 if (PERLDB_INTER) {
3841441e 1563 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1564 if (cv) {
1565 dSP;
1566 PUSHMARK(sp);
1567 XPUSHs((SV*)compiling.cop_filegv);
1568 PUTBACK;
1569 perl_call_sv((SV*)cv, G_DISCARD);
1570 }
1571 }
79072805 1572 }
79072805
LW		 1573}
1574
1575OP *
8ac85365 1576localize(OP *o, I32 lex)
79072805
LW		 1577{
1578 if (o->op_flags & OPf_PARENS)
1579 list(o);
8990e307 1580 else {
8990e307
LW		 1581 if (dowarn && bufptr > oldbufptr && bufptr[-1] == ',') {
1582 char *s;
1583 for (s = bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1584 if (*s == ';' || *s == '=')
8990e307
LW		 1585 warn("Parens missing around \"%s\" list", lex ? "my" : "local");
1586 }
1587 }
93a17b20 1588 in_my = FALSE;
c750a3ec 1589 in_my_stash = Nullhv;
93a17b20
LW		 1590 if (lex)
1591 return my(o);
1592 else
463ee0b2 1593 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1594}
1595
1596OP *
8ac85365 1597jmaybe(OP *o)
79072805
LW		 1598{
1599 if (o->op_type == OP_LIST) {
554b3eca
MB		 1600 OP *o2;
1601#ifdef USE_THREADS
2faa37cc 1602 o2 = newOP(OP_THREADSV, 0);
54b9620d 1603 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1604#else
1605 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1606#endif /* USE_THREADS */
1607 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1608 }
1609 return o;
1610}
1611
1612OP *
8ac85365 1613fold_constants(register OP *o)
79072805 1614{
11343788 1615 dTHR;
79072805
LW		 1616 register OP *curop;
1617 I32 type = o->op_type;
748a9306 1618 SV *sv;
79072805
LW		 1619
1620 if (opargs[type] & OA_RETSCALAR)
1621 scalar(o);
1622 if (opargs[type] & OA_TARGET)
ed6116ce 1623 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1624
85e6fe83 1625 if ((opargs[type] & OA_OTHERINT) && (hints & HINT_INTEGER))
a0d0e21e 1626 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1627
79072805
LW		 1628 if (!(opargs[type] & OA_FOLDCONST))
1629 goto nope;
1630
de939608
CS		 1631 switch (type) {
1632 case OP_SPRINTF:
1633 case OP_UCFIRST:
1634 case OP_LCFIRST:
1635 case OP_UC:
1636 case OP_LC:
69dcf70c
MB		 1637 case OP_SLT:
1638 case OP_SGT:
1639 case OP_SLE:
1640 case OP_SGE:
1641 case OP_SCMP:
1642
de939608
CS		 1643 if (o->op_private & OPpLOCALE)
1644 goto nope;
1645 }
1646
a0d0e21e
LW		 1647 if (error_count)
1648 goto nope; /* Don't try to run w/ errors */
1649
79072805 1650 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1651 if (curop->op_type != OP_CONST &&
1652 curop->op_type != OP_LIST &&
1653 curop->op_type != OP_SCALAR &&
a0d0e21e 1654 curop->op_type != OP_NULL &&
93a17b20 1655 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1656 goto nope;
1657 }
1658 }
1659
1660 curop = LINKLIST(o);
1661 o->op_next = 0;
1662 op = curop;
8da795c6 1663 runops();
748a9306
LW		 1664 sv = *(stack_sp--);
1665 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1666 pad_swipe(o->op_targ);
748a9306
LW		 1667 else if (SvTEMP(sv)) { /* grab mortal temp? */
1668 (void)SvREFCNT_inc(sv);
1669 SvTEMP_off(sv);
85e6fe83 1670 }
79072805
LW		 1671 op_free(o);
1672 if (type == OP_RV2GV)
b1cb66bf 1673 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306
LW		 1674 else {
1675 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK) {
1676 IV iv = SvIV(sv);
1677 if ((double)iv == SvNV(sv)) { /* can we smush double to int */
1678 SvREFCNT_dec(sv);
1679 sv = newSViv(iv);
1680 }
b1cb66bf 1681 else
1682 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1683 }
1684 return newSVOP(OP_CONST, 0, sv);
1685 }
aeea060c 1686
79072805
LW		 1687 nope:
1688 if (!(opargs[type] & OA_OTHERINT))
1689 return o;
79072805 1690
85e6fe83 1691 if (!(hints & HINT_INTEGER)) {
a0d0e21e 1692 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1693 return o;
1694
1695 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1696 if (curop->op_type == OP_CONST) {
b1cb66bf 1697 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1698 continue;
1699 return o;
1700 }
1701 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1702 continue;
1703 return o;
1704 }
a0d0e21e 1705 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1706 }
1707
79072805
LW		 1708 return o;
1709}
1710
1711OP *
8ac85365 1712gen_constant_list(register OP *o)
79072805 1713{
11343788 1714 dTHR;
79072805 1715 register OP *curop;
79072805 1716 I32 oldtmps_floor = tmps_floor;
79072805 1717
a0d0e21e
LW		 1718 list(o);
1719 if (error_count)
1720 return o; /* Don't attempt to run with errors */
1721
1722 op = curop = LINKLIST(o);
1723 o->op_next = 0;
11343788 1724 pp_pushmark(ARGS);
8da795c6 1725 runops();
a0d0e21e 1726 op = curop;
11343788 1727 pp_anonlist(ARGS);
79072805 1728 tmps_floor = oldtmps_floor;
79072805
LW		 1729
1730 o->op_type = OP_RV2AV;
1731 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1732 curop = ((UNOP*)o)->op_first;
a0d0e21e 1733 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*stack_sp--));
79072805 1734 op_free(curop);
79072805
LW		 1735 linklist(o);
1736 return list(o);
1737}
1738
1739OP *
8ac85365 1740convert(I32 type, I32 flags, OP *o)
79072805
LW		 1741{
1742 OP *kid;
a0d0e21e 1743 OP *last = 0;
79072805 1744
11343788
MB		 1745 if (!o || o->op_type != OP_LIST)
1746 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1747 else
5dc0d613 1748 o->op_flags &= ~OPf_WANT;
79072805 1749
8990e307 1750 if (!(opargs[type] & OA_MARK))
11343788 1751 null(cLISTOPo->op_first);
8990e307 1752
11343788
MB		 1753 o->op_type = type;
1754 o->op_ppaddr = ppaddr[type];
1755 o->op_flags |= flags;
79072805 1756
11343788
MB		 1757 o = CHECKOP(type, o);
1758 if (o->op_type != type)
1759 return o;
79072805 1760
11343788 1761 if (cLISTOPo->op_children < 7) {
79072805 1762 /* XXX do we really need to do this if we're done appending?? */
11343788 1763 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1764 last = kid;
11343788 1765 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1766 }
1767
11343788 1768 return fold_constants(o);
79072805
LW		 1769}
1770
1771/* List constructors */
1772
1773OP *
8ac85365 1774append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1775{
1776 if (!first)
1777 return last;
8990e307
LW		 1778
1779 if (!last)
79072805 1780 return first;
8990e307 1781
a0d0e21e
LW		 1782 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1783 return newLISTOP(type, 0, first, last);
79072805 1784
a0d0e21e
LW		 1785 if (first->op_flags & OPf_KIDS)
1786 ((LISTOP*)first)->op_last->op_sibling = last;
1787 else {
1788 first->op_flags |= OPf_KIDS;
1789 ((LISTOP*)first)->op_first = last;
1790 }
1791 ((LISTOP*)first)->op_last = last;
1792 ((LISTOP*)first)->op_children++;
1793 return first;
79072805
LW		 1794}
1795
1796OP *
8ac85365 1797append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1798{
1799 if (!first)
1800 return (OP*)last;
8990e307
LW		 1801
1802 if (!last)
79072805 1803 return (OP*)first;
8990e307
LW		 1804
1805 if (first->op_type != type)
79072805 1806 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1807
1808 if (last->op_type != type)
79072805
LW		 1809 return append_elem(type, (OP*)first, (OP*)last);
1810
1811 first->op_last->op_sibling = last->op_first;
1812 first->op_last = last->op_last;
1813 first->op_children += last->op_children;
1814 if (first->op_children)
1815 last->op_flags |= OPf_KIDS;
1816
1817 Safefree(last);
1818 return (OP*)first;
1819}
1820
1821OP *
8ac85365 1822prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1823{
1824 if (!first)
1825 return last;
8990e307
LW		 1826
1827 if (!last)
79072805 1828 return first;
8990e307
LW		 1829
1830 if (last->op_type == type) {
1831 if (type == OP_LIST) { /* already a PUSHMARK there */
1832 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1833 ((LISTOP*)last)->op_first->op_sibling = first;
1834 }
1835 else {
1836 if (!(last->op_flags & OPf_KIDS)) {
1837 ((LISTOP*)last)->op_last = first;
1838 last->op_flags |= OPf_KIDS;
1839 }
1840 first->op_sibling = ((LISTOP*)last)->op_first;
1841 ((LISTOP*)last)->op_first = first;
79072805 1842 }
79072805
LW		 1843 ((LISTOP*)last)->op_children++;
1844 return last;
1845 }
1846
1847 return newLISTOP(type, 0, first, last);
1848}
1849
1850/* Constructors */
1851
1852OP *
8ac85365 1853newNULLLIST(void)
79072805 1854{
8990e307
LW		 1855 return newOP(OP_STUB, 0);
1856}
1857
1858OP *
8ac85365 1859force_list(OP *o)
8990e307 1860{
11343788
MB		 1861 if (!o || o->op_type != OP_LIST)
1862 o = newLISTOP(OP_LIST, 0, o, Nullop);
1863 null(o);
1864 return o;
79072805
LW		 1865}
1866
1867OP *
8ac85365 1868newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1869{
1870 LISTOP *listop;
1871
1872 Newz(1101, listop, 1, LISTOP);
1873
1874 listop->op_type = type;
1875 listop->op_ppaddr = ppaddr[type];
1876 listop->op_children = (first != 0) + (last != 0);
1877 listop->op_flags = flags;
79072805
LW		 1878
1879 if (!last && first)
1880 last = first;
1881 else if (!first && last)
1882 first = last;
8990e307
LW		 1883 else if (first)
1884 first->op_sibling = last;
79072805
LW		 1885 listop->op_first = first;
1886 listop->op_last = last;
8990e307
LW		 1887 if (type == OP_LIST) {
1888 OP* pushop;
1889 pushop = newOP(OP_PUSHMARK, 0);
1890 pushop->op_sibling = first;
1891 listop->op_first = pushop;
1892 listop->op_flags |= OPf_KIDS;
1893 if (!last)
1894 listop->op_last = pushop;
1895 }
1896 else if (listop->op_children)
1897 listop->op_flags |= OPf_KIDS;
79072805
LW		 1898
1899 return (OP*)listop;
1900}
1901
1902OP *
8ac85365 1903newOP(I32 type, I32 flags)
79072805 1904{
11343788
MB		 1905 OP *o;
1906 Newz(1101, o, 1, OP);
1907 o->op_type = type;
1908 o->op_ppaddr = ppaddr[type];
1909 o->op_flags = flags;
79072805 1910
11343788
MB		 1911 o->op_next = o;
1912 o->op_private = 0 + (flags >> 8);
79072805 1913 if (opargs[type] & OA_RETSCALAR)
11343788 1914 scalar(o);
79072805 1915 if (opargs[type] & OA_TARGET)
11343788
MB		 1916 o->op_targ = pad_alloc(type, SVs_PADTMP);
1917 return CHECKOP(type, o);
79072805
LW		 1918}
1919
1920OP *
8ac85365 1921newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 1922{
1923 UNOP *unop;
1924
93a17b20 1925 if (!first)
aeea060c 1926 first = newOP(OP_STUB, 0);
8990e307
LW		 1927 if (opargs[type] & OA_MARK)
1928 first = force_list(first);
93a17b20 1929
79072805
LW		 1930 Newz(1101, unop, 1, UNOP);
1931 unop->op_type = type;
1932 unop->op_ppaddr = ppaddr[type];
1933 unop->op_first = first;
1934 unop->op_flags = flags | OPf_KIDS;
c07a80fd 1935 unop->op_private = 1 | (flags >> 8);
c277df42
IZ		 1936#if 1
1937 if(type == OP_STUDY && first->op_type == OP_MATCH) {
1938 first->op_type = OP_PUSHRE;
1939 first->op_ppaddr = ppaddr[OP_PUSHRE];
1940 }
1941#endif
e50aee73 1942 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 1943 if (unop->op_next)
1944 return (OP*)unop;
1945
a0d0e21e 1946 return fold_constants((OP *) unop);
79072805
LW		 1947}
1948
1949OP *
8ac85365 1950newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1951{
1952 BINOP *binop;
1953 Newz(1101, binop, 1, BINOP);
1954
1955 if (!first)
1956 first = newOP(OP_NULL, 0);
1957
1958 binop->op_type = type;
1959 binop->op_ppaddr = ppaddr[type];
1960 binop->op_first = first;
1961 binop->op_flags = flags | OPf_KIDS;
1962 if (!last) {
1963 last = first;
c07a80fd 1964 binop->op_private = 1 | (flags >> 8);
79072805
LW		 1965 }
1966 else {
c07a80fd 1967 binop->op_private = 2 | (flags >> 8);
79072805
LW		 1968 first->op_sibling = last;
1969 }
1970
e50aee73 1971 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 1972 if (binop->op_next)
1973 return (OP*)binop;
1974
1975 binop->op_last = last = binop->op_first->op_sibling;
1976
a0d0e21e 1977 return fold_constants((OP *)binop);
79072805
LW		 1978}
1979
1980OP *
8ac85365 1981pmtrans(OP *o, OP *expr, OP *repl)
79072805 1982{
79072805
LW		 1983 SV *tstr = ((SVOP*)expr)->op_sv;
1984 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 1985 STRLEN tlen;
1986 STRLEN rlen;
ec49126f 1987 register U8 *t = (U8*)SvPV(tstr, tlen);
1988 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 1989 register I32 i;
1990 register I32 j;
8ac85365 1991 I32 Delete;
79072805 1992 I32 complement;
5d06d08e 1993 I32 squash;
79072805
LW		 1994 register short *tbl;
1995
11343788
MB		 1996 tbl = (short*)cPVOPo->op_pv;
1997 complement = o->op_private & OPpTRANS_COMPLEMENT;
8ac85365 1998 Delete = o->op_private & OPpTRANS_DELETE;
5d06d08e 1999 squash = o->op_private & OPpTRANS_SQUASH;
79072805
LW		 2000
2001 if (complement) {
2002 Zero(tbl, 256, short);
2003 for (i = 0; i < tlen; i++)
ec49126f 2004 tbl[t[i]] = -1;
79072805
LW		 2005 for (i = 0, j = 0; i < 256; i++) {
2006 if (!tbl[i]) {
2007 if (j >= rlen) {
8ac85365 2008 if (Delete)
79072805
LW		 2009 tbl[i] = -2;
2010 else if (rlen)
ec49126f 2011 tbl[i] = r[j-1];
79072805
LW		 2012 else
2013 tbl[i] = i;
2014 }
2015 else
ec49126f 2016 tbl[i] = r[j++];
79072805
LW		 2017 }
2018 }
2019 }
2020 else {
8ac85365 2021 if (!rlen && !Delete) {
79072805 2022 r = t; rlen = tlen;
5d06d08e
MB		 2023 if (!squash)
2024 o->op_private |= OPpTRANS_COUNTONLY;
79072805
LW		 2025 }
2026 for (i = 0; i < 256; i++)
2027 tbl[i] = -1;
2028 for (i = 0, j = 0; i < tlen; i++,j++) {
2029 if (j >= rlen) {
8ac85365 2030 if (Delete) {
ec49126f 2031 if (tbl[t[i]] == -1)
2032 tbl[t[i]] = -2;
79072805
LW		 2033 continue;
2034 }
2035 --j;
2036 }
ec49126f 2037 if (tbl[t[i]] == -1)
2038 tbl[t[i]] = r[j];
79072805
LW		 2039 }
2040 }
2041 op_free(expr);
2042 op_free(repl);
2043
11343788 2044 return o;
79072805
LW		 2045}
2046
2047OP *
8ac85365 2048newPMOP(I32 type, I32 flags)
79072805 2049{
11343788 2050 dTHR;
79072805
LW		 2051 PMOP *pmop;
2052
2053 Newz(1101, pmop, 1, PMOP);
2054 pmop->op_type = type;
2055 pmop->op_ppaddr = ppaddr[type];
2056 pmop->op_flags = flags;
c07a80fd 2057 pmop->op_private = 0 | (flags >> 8);
79072805 2058
36477c24 2059 if (hints & HINT_LOCALE)
2060 pmop->op_pmpermflags = (pmop->op_pmflags |= PMf_LOCALE);
2061
79072805 2062 /* link into pm list */
a0d0e21e 2063 if (type != OP_TRANS && curstash) {
79072805
LW		 2064 pmop->op_pmnext = HvPMROOT(curstash);
2065 HvPMROOT(curstash) = pmop;
2066 }
2067
2068 return (OP*)pmop;
2069}
2070
2071OP *
8ac85365 2072pmruntime(OP *o, OP *expr, OP *repl)
79072805
LW		 2073{
2074 PMOP *pm;
2075 LOGOP *rcop;
2076
11343788
MB		 2077 if (o->op_type == OP_TRANS)
2078 return pmtrans(o, expr, repl);
79072805 2079
3e3baf6d 2080 hints |= HINT_BLOCK_SCOPE;
11343788 2081 pm = (PMOP*)o;
79072805
LW		 2082
2083 if (expr->op_type == OP_CONST) {
463ee0b2 2084 STRLEN plen;
79072805 2085 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2086 char *p = SvPV(pat, plen);
11343788 2087 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2088 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2089 p = SvPV(pat, plen);
79072805
LW		 2090 pm->op_pmflags |= PMf_SKIPWHITE;
2091 }
e50aee73 2092 pm->op_pmregexp = pregcomp(p, p + plen, pm);
aeea060c 2093 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2094 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2095 op_free(expr);
2096 }
2097 else {
463ee0b2
LW		 2098 if (pm->op_pmflags & PMf_KEEP)
2099 expr = newUNOP(OP_REGCMAYBE,0,expr);
2100
79072805
LW		 2101 Newz(1101, rcop, 1, LOGOP);
2102 rcop->op_type = OP_REGCOMP;
2103 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2104 rcop->op_first = scalar(expr);
2105 rcop->op_flags |= OPf_KIDS;
2106 rcop->op_private = 1;
11343788 2107 rcop->op_other = o;
79072805
LW		 2108
2109 /* establish postfix order */
463ee0b2
LW		 2110 if (pm->op_pmflags & PMf_KEEP) {
2111 LINKLIST(expr);
2112 rcop->op_next = expr;
2113 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2114 }
2115 else {
2116 rcop->op_next = LINKLIST(expr);
2117 expr->op_next = (OP*)rcop;
2118 }
79072805 2119
11343788 2120 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2121 }
2122
2123 if (repl) {
748a9306
LW		 2124 OP *curop;
2125 if (pm->op_pmflags & PMf_EVAL)
2126 curop = 0;
554b3eca 2127#ifdef USE_THREADS
2faa37cc 2128 else if (repl->op_type == OP_THREADSV
554b3eca 2129 && strchr("&`'123456789+",
54b9620d 2130 threadsv_names[repl->op_targ]))
554b3eca
MB		 2131 {
2132 curop = 0;
2133 }
2134#endif /* USE_THREADS */
748a9306
LW		 2135 else if (repl->op_type == OP_CONST)
2136 curop = repl;
79072805 2137 else {
79072805
LW		 2138 OP *lastop = 0;
2139 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2140 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2141#ifdef USE_THREADS
2faa37cc 2142 if (curop->op_type == OP_THREADSV
554b3eca
MB		 2143 && strchr("&`'123456789+", curop->op_private)) {
2144 break;
2145 }
2146#else
79072805
LW		 2147 if (curop->op_type == OP_GV) {
2148 GV *gv = ((GVOP*)curop)->op_gv;
93a17b20 2149 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2150 break;
2151 }
554b3eca 2152#endif /* USE_THREADS */
79072805
LW		 2153 else if (curop->op_type == OP_RV2CV)
2154 break;
2155 else if (curop->op_type == OP_RV2SV ||
2156 curop->op_type == OP_RV2AV ||
2157 curop->op_type == OP_RV2HV ||
2158 curop->op_type == OP_RV2GV) {
2159 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2160 break;
2161 }
748a9306
LW		 2162 else if (curop->op_type == OP_PADSV ||
2163 curop->op_type == OP_PADAV ||
2164 curop->op_type == OP_PADHV ||
554b3eca 2165 curop->op_type == OP_PADANY) {
748a9306
LW		 2166 /* is okay */
2167 }
79072805
LW		 2168 else
2169 break;
2170 }
2171 lastop = curop;
2172 }
748a9306
LW		 2173 }
2174 if (curop == repl) {
2175 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2176 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2177 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2178 }
2179 else {
2180 Newz(1101, rcop, 1, LOGOP);
2181 rcop->op_type = OP_SUBSTCONT;
2182 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2183 rcop->op_first = scalar(repl);
2184 rcop->op_flags |= OPf_KIDS;
2185 rcop->op_private = 1;
11343788 2186 rcop->op_other = o;
748a9306
LW		 2187
2188 /* establish postfix order */
2189 rcop->op_next = LINKLIST(repl);
2190 repl->op_next = (OP*)rcop;
2191
2192 pm->op_pmreplroot = scalar((OP*)rcop);
2193 pm->op_pmreplstart = LINKLIST(rcop);
2194 rcop->op_next = 0;
79072805
LW		 2195 }
2196 }
2197
2198 return (OP*)pm;
2199}
2200
2201OP *
8ac85365 2202newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2203{
2204 SVOP *svop;
2205 Newz(1101, svop, 1, SVOP);
2206 svop->op_type = type;
2207 svop->op_ppaddr = ppaddr[type];
2208 svop->op_sv = sv;
2209 svop->op_next = (OP*)svop;
2210 svop->op_flags = flags;
2211 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2212 scalar((OP*)svop);
79072805 2213 if (opargs[type] & OA_TARGET)
ed6116ce 2214 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2215 return CHECKOP(type, svop);
79072805
LW		 2216}
2217
2218OP *
8ac85365 2219newGVOP(I32 type, I32 flags, GV *gv)
79072805 2220{
11343788 2221 dTHR;
79072805
LW		 2222 GVOP *gvop;
2223 Newz(1101, gvop, 1, GVOP);
2224 gvop->op_type = type;
2225 gvop->op_ppaddr = ppaddr[type];
8990e307 2226 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2227 gvop->op_next = (OP*)gvop;
2228 gvop->op_flags = flags;
2229 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2230 scalar((OP*)gvop);
79072805 2231 if (opargs[type] & OA_TARGET)
ed6116ce 2232 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2233 return CHECKOP(type, gvop);
79072805
LW		 2234}
2235
2236OP *
8ac85365 2237newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2238{
2239 PVOP *pvop;
2240 Newz(1101, pvop, 1, PVOP);
2241 pvop->op_type = type;
2242 pvop->op_ppaddr = ppaddr[type];
2243 pvop->op_pv = pv;
2244 pvop->op_next = (OP*)pvop;
2245 pvop->op_flags = flags;
2246 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2247 scalar((OP*)pvop);
79072805 2248 if (opargs[type] & OA_TARGET)
ed6116ce 2249 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2250 return CHECKOP(type, pvop);
79072805
LW		 2251}
2252
79072805 2253void
8ac85365 2254package(OP *o)
79072805 2255{
11343788 2256 dTHR;
93a17b20 2257 SV *sv;
79072805
LW		 2258
2259 save_hptr(&curstash);
2260 save_item(curstname);
11343788 2261 if (o) {
463ee0b2
LW		 2262 STRLEN len;
2263 char *name;
11343788 2264 sv = cSVOPo->op_sv;
463ee0b2 2265 name = SvPV(sv, len);
b1cb66bf 2266 curstash = gv_stashpvn(name,len,TRUE);
463ee0b2 2267 sv_setpvn(curstname, name, len);
11343788 2268 op_free(o);
93a17b20
LW		 2269 }
2270 else {
2271 sv_setpv(curstname,"<none>");
2272 curstash = Nullhv;
2273 }
79072805 2274 copline = NOLINE;
8990e307 2275 expect = XSTATE;
79072805
LW		 2276}
2277
85e6fe83 2278void
8ac85365 2279utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2280{
a0d0e21e
LW		 2281 OP *pack;
2282 OP *meth;
2283 OP *rqop;
2284 OP *imop;
b1cb66bf 2285 OP *veop;
85e6fe83 2286
a0d0e21e
LW		 2287 if (id->op_type != OP_CONST)
2288 croak("Module name must be constant");
85e6fe83 2289
b1cb66bf 2290 veop = Nullop;
2291
2292 if(version != Nullop) {
2293 SV *vesv = ((SVOP*)version)->op_sv;
2294
2295 if (arg == Nullop && !SvNIOK(vesv)) {
2296 arg = version;
2297 }
2298 else {
2299 OP *pack;
2300 OP *meth;
2301
2302 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2303 croak("Version number must be constant number");
2304
2305 /* Make copy of id so we don't free it twice */
2306 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2307
2308 /* Fake up a method call to VERSION */
2309 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2310 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2311 append_elem(OP_LIST,
2312 prepend_elem(OP_LIST, pack, list(version)),
2313 newUNOP(OP_METHOD, 0, meth)));
2314 }
2315 }
aeea060c 2316
a0d0e21e 2317 /* Fake up an import/unimport */
4633a7c4
LW		 2318 if (arg && arg->op_type == OP_STUB)
2319 imop = arg; /* no import on explicit () */
b1cb66bf 2320 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2321 imop = Nullop; /* use 5.0; */
2322 }
4633a7c4
LW		 2323 else {
2324 /* Make copy of id so we don't free it twice */
2325 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2326 meth = newSVOP(OP_CONST, 0,
2327 aver
2328 ? newSVpv("import", 6)
2329 : newSVpv("unimport", 8)
2330 );
2331 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2332 append_elem(OP_LIST,
2333 prepend_elem(OP_LIST, pack, list(arg)),
2334 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2335 }
2336
2337 /* Fake up a require */
2338 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2339
2340 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2341 newSUB(floor,
a0d0e21e 2342 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2343 Nullop,
a0d0e21e 2344 append_elem(OP_LINESEQ,
b1cb66bf 2345 append_elem(OP_LINESEQ,
2346 newSTATEOP(0, Nullch, rqop),
2347 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2348 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2349
85e6fe83
LW		 2350 copline = NOLINE;
2351 expect = XSTATE;
2352}
2353
79072805 2354OP *
8ac85365 2355newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2356{
2357 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2358 list(force_list(subscript)),
2359 list(force_list(listval)) );
79072805
LW		 2360}
2361
2362static I32
8ac85365 2363list_assignment(register OP *o)
79072805 2364{
11343788 2365 if (!o)
79072805
LW		 2366 return TRUE;
2367
11343788
MB		 2368 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2369 o = cUNOPo->op_first;
79072805 2370
11343788
MB		 2371 if (o->op_type == OP_COND_EXPR) {
2372 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2373 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2374
2375 if (t && f)
2376 return TRUE;
2377 if (t || f)
2378 yyerror("Assignment to both a list and a scalar");
2379 return FALSE;
2380 }
2381
11343788
MB		 2382 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2383 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2384 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2385 return TRUE;
2386
11343788 2387 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2388 return TRUE;
2389
11343788 2390 if (o->op_type == OP_RV2SV)
79072805
LW		 2391 return FALSE;
2392
2393 return FALSE;
2394}
2395
2396OP *
8ac85365 2397newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2398{
11343788 2399 OP *o;
79072805 2400
a0d0e21e
LW		 2401 if (optype) {
2402 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2403 return newLOGOP(optype, 0,
2404 mod(scalar(left), optype),
2405 newUNOP(OP_SASSIGN, 0, scalar(right)));
2406 }
2407 else {
2408 return newBINOP(optype, OPf_STACKED,
2409 mod(scalar(left), optype), scalar(right));
2410 }
2411 }
2412
79072805 2413 if (list_assignment(left)) {
463ee0b2 2414 modcount = 0;
748a9306 2415 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2416 left = mod(left, OP_AASSIGN);
748a9306
LW		 2417 if (eval_start)
2418 eval_start = 0;
2419 else {
a0d0e21e
LW		 2420 op_free(left);
2421 op_free(right);
2422 return Nullop;
2423 }
11343788 2424 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2425 list(force_list(right)),
2426 list(force_list(left)) );
11343788 2427 o->op_private = 0 | (flags >> 8);
a0d0e21e 2428 if (!(left->op_private & OPpLVAL_INTRO)) {
748a9306 2429 static int generation = 100;
79072805 2430 OP *curop;
11343788 2431 OP *lastop = o;
79072805 2432 generation++;
11343788 2433 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2434 if (opargs[curop->op_type] & OA_DANGEROUS) {
2435 if (curop->op_type == OP_GV) {
2436 GV *gv = ((GVOP*)curop)->op_gv;
2437 if (gv == defgv || SvCUR(gv) == generation)
2438 break;
2439 SvCUR(gv) = generation;
2440 }
748a9306
LW		 2441 else if (curop->op_type == OP_PADSV ||
2442 curop->op_type == OP_PADAV ||
2443 curop->op_type == OP_PADHV ||
2444 curop->op_type == OP_PADANY) {
2445 SV **svp = AvARRAY(comppad_name);
8e07c86e 2446 SV *sv = svp[curop->op_targ];
748a9306
LW		 2447 if (SvCUR(sv) == generation)
2448 break;
2449 SvCUR(sv) = generation; /* (SvCUR not used any more) */
2450 }
79072805
LW		 2451 else if (curop->op_type == OP_RV2CV)
2452 break;
2453 else if (curop->op_type == OP_RV2SV ||
2454 curop->op_type == OP_RV2AV ||
2455 curop->op_type == OP_RV2HV ||
2456 curop->op_type == OP_RV2GV) {
2457 if (lastop->op_type != OP_GV) /* funny deref? */
2458 break;
2459 }
2460 else
2461 break;
2462 }
2463 lastop = curop;
2464 }
11343788
MB		 2465 if (curop != o)
2466 o->op_private = OPpASSIGN_COMMON;
79072805 2467 }
c07a80fd 2468 if (right && right->op_type == OP_SPLIT) {
2469 OP* tmpop;
2470 if ((tmpop = ((LISTOP*)right)->op_first) &&
2471 tmpop->op_type == OP_PUSHRE)
2472 {
2473 PMOP *pm = (PMOP*)tmpop;
2474 if (left->op_type == OP_RV2AV &&
2475 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2476 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2477 {
2478 tmpop = ((UNOP*)left)->op_first;
2479 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2480 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2481 pm->op_pmflags |= PMf_ONCE;
11343788 2482 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2483 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2484 tmpop->op_sibling = Nullop; /* don't free split */
2485 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2486 op_free(o); /* blow off assign */
54310121 2487 right->op_flags &= ~OPf_WANT;
a5f75d66 2488 /* "I don't know and I don't care." */
c07a80fd 2489 return right;
2490 }
2491 }
2492 else {
2493 if (modcount < 10000 &&
2494 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2495 {
2496 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2497 if (SvIVX(sv) == 0)
2498 sv_setiv(sv, modcount+1);
2499 }
2500 }
2501 }
2502 }
11343788 2503 return o;
79072805
LW		 2504 }
2505 if (!right)
2506 right = newOP(OP_UNDEF, 0);
2507 if (right->op_type == OP_READLINE) {
2508 right->op_flags |= OPf_STACKED;
463ee0b2 2509 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2510 }
a0d0e21e 2511 else {
748a9306 2512 eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2513 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2514 scalar(right), mod(scalar(left), OP_SASSIGN) );
748a9306
LW		 2515 if (eval_start)
2516 eval_start = 0;
2517 else {
11343788 2518 op_free(o);
a0d0e21e
LW		 2519 return Nullop;
2520 }
2521 }
11343788 2522 return o;
79072805
LW		 2523}
2524
2525OP *
8ac85365 2526newSTATEOP(I32 flags, char *label, OP *o)
79072805 2527{
11343788 2528 dTHR;
bbce6d69 2529 U32 seq = intro_my();
79072805
LW		 2530 register COP *cop;
2531
2532 Newz(1101, cop, 1, COP);
84902520 2533 if (PERLDB_LINE && curcop->cop_line && curstash != debstash) {
8990e307
LW		 2534 cop->op_type = OP_DBSTATE;
2535 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2536 }
2537 else {
2538 cop->op_type = OP_NEXTSTATE;
2539 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2540 }
79072805 2541 cop->op_flags = flags;
c07a80fd 2542 cop->op_private = 0 | (flags >> 8);
ff0cee69 2543#ifdef NATIVE_HINTS
2544 cop->op_private |= NATIVE_HINTS;
2545#endif
79072805
LW		 2546 cop->op_next = (OP*)cop;
2547
463ee0b2
LW		 2548 if (label) {
2549 cop->cop_label = label;
85e6fe83 2550 hints |= HINT_BLOCK_SCOPE;
463ee0b2 2551 }
bbce6d69 2552 cop->cop_seq = seq;
a0d0e21e 2553 cop->cop_arybase = curcop->cop_arybase;
79072805
LW		 2554
2555 if (copline == NOLINE)
2556 cop->cop_line = curcop->cop_line;
2557 else {
2558 cop->cop_line = copline;
2559 copline = NOLINE;
2560 }
44a8e56a 2561 cop->cop_filegv = (GV*)SvREFCNT_inc(curcop->cop_filegv);
79072805
LW		 2562 cop->cop_stash = curstash;
2563
84902520 2564 if (PERLDB_LINE && curstash != debstash) {
93a17b20
LW		 2565 SV **svp = av_fetch(GvAV(curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2566 if (svp && *svp != &sv_undef && !SvIOK(*svp)) {
a0d0e21e 2567 (void)SvIOK_on(*svp);
a5f75d66 2568 SvIVX(*svp) = 1;
93a17b20
LW		 2569 SvSTASH(*svp) = (HV*)cop;
2570 }
2571 }
2572
11343788 2573 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2574}
2575
bbce6d69 2576/* "Introduce" my variables to visible status. */
2577U32
8ac85365 2578intro_my(void)
bbce6d69 2579{
2580 SV **svp;
2581 SV *sv;
2582 I32 i;
2583
2584 if (! min_intro_pending)
2585 return cop_seqmax;
2586
2587 svp = AvARRAY(comppad_name);
2588 for (i = min_intro_pending; i <= max_intro_pending; i++) {
2589 if ((sv = svp[i]) && sv != &sv_undef && !SvIVX(sv)) {
2590 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
2591 SvNVX(sv) = (double)cop_seqmax;
2592 }
2593 }
2594 min_intro_pending = 0;
2595 comppad_name_fill = max_intro_pending; /* Needn't search higher */
2596 return cop_seqmax++;
2597}
2598
79072805 2599OP *
8ac85365 2600newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2601{
883ffac3
CS		 2602 return new_logop(type, flags, &first, &other);
2603}
2604
2605static OP *
2606new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2607{
11343788 2608 dTHR;
79072805 2609 LOGOP *logop;
11343788 2610 OP *o;
883ffac3
CS		 2611 OP *first = *firstp;
2612 OP *other = *otherp;
79072805 2613
a0d0e21e
LW		 2614 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2615 return newBINOP(type, flags, scalar(first), scalar(other));
2616
8990e307 2617 scalarboolean(first);
79072805
LW		 2618 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2619 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2620 if (type == OP_AND || type == OP_OR) {
2621 if (type == OP_AND)
2622 type = OP_OR;
2623 else
2624 type = OP_AND;
11343788 2625 o = first;
883ffac3 2626 first = *firstp = cUNOPo->op_first;
11343788
MB		 2627 if (o->op_next)
2628 first->op_next = o->op_next;
2629 cUNOPo->op_first = Nullop;
2630 op_free(o);
79072805
LW		 2631 }
2632 }
2633 if (first->op_type == OP_CONST) {
93a17b20 2634 if (dowarn && (first->op_private & OPpCONST_BARE))
c07a80fd 2635 warn("Probable precedence problem on %s", op_desc[type]);
79072805
LW		 2636 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2637 op_free(first);
883ffac3 2638 *firstp = Nullop;
79072805
LW		 2639 return other;
2640 }
2641 else {
2642 op_free(other);
883ffac3 2643 *otherp = Nullop;
79072805
LW		 2644 return first;
2645 }
2646 }
2647 else if (first->op_type == OP_WANTARRAY) {
2648 if (type == OP_AND)
2649 list(other);
2650 else
2651 scalar(other);
2652 }
a6006777 2653 else if (dowarn && (first->op_flags & OPf_KIDS)) {
2654 OP *k1 = ((UNOP*)first)->op_first;
2655 OP *k2 = k1->op_sibling;
2656 OPCODE warnop = 0;
2657 switch (first->op_type)
2658 {
2659 case OP_NULL:
2660 if (k2 && k2->op_type == OP_READLINE
2661 && (k2->op_flags & OPf_STACKED)
2662 && (k1->op_type == OP_RV2SV || k1->op_type == OP_PADSV))
2663 warnop = k2->op_type;
2664 break;
2665
2666 case OP_SASSIGN:
68dc0745 2667 if (k1->op_type == OP_READDIR
2668 || k1->op_type == OP_GLOB
2669 || k1->op_type == OP_EACH)
a6006777 2670 warnop = k1->op_type;
2671 break;
2672 }
8ebc5c01 2673 if (warnop) {
2674 line_t oldline = curcop->cop_line;
2675 curcop->cop_line = copline;
68dc0745 2676 warn("Value of %s%s can be \"0\"; test with defined()",
2677 op_desc[warnop],
2678 ((warnop == OP_READLINE || warnop == OP_GLOB)
2679 ? " construct" : "() operator"));
2680 curcop->cop_line = oldline;
8ebc5c01 2681 }
a6006777 2682 }
79072805
LW		 2683
2684 if (!other)
2685 return first;
2686
a0d0e21e
LW		 2687 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2688 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
2689
79072805
LW		 2690 Newz(1101, logop, 1, LOGOP);
2691
2692 logop->op_type = type;
2693 logop->op_ppaddr = ppaddr[type];
2694 logop->op_first = first;
2695 logop->op_flags = flags | OPf_KIDS;
2696 logop->op_other = LINKLIST(other);
c07a80fd 2697 logop->op_private = 1 | (flags >> 8);
79072805
LW		 2698
2699 /* establish postfix order */
2700 logop->op_next = LINKLIST(first);
2701 first->op_next = (OP*)logop;
2702 first->op_sibling = other;
2703
11343788
MB		 2704 o = newUNOP(OP_NULL, 0, (OP*)logop);
2705 other->op_next = o;
79072805 2706
11343788 2707 return o;
79072805
LW		 2708}
2709
2710OP *
8ac85365 2711newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 2712{
11343788 2713 dTHR;
79072805 2714 CONDOP *condop;
11343788 2715 OP *o;
79072805 2716
b1cb66bf 2717 if (!falseop)
2718 return newLOGOP(OP_AND, 0, first, trueop);
2719 if (!trueop)
2720 return newLOGOP(OP_OR, 0, first, falseop);
79072805 2721
8990e307 2722 scalarboolean(first);
79072805
LW		 2723 if (first->op_type == OP_CONST) {
2724 if (SvTRUE(((SVOP*)first)->op_sv)) {
2725 op_free(first);
b1cb66bf 2726 op_free(falseop);
2727 return trueop;
79072805
LW		 2728 }
2729 else {
2730 op_free(first);
b1cb66bf 2731 op_free(trueop);
2732 return falseop;
79072805
LW		 2733 }
2734 }
2735 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 2736 list(trueop);
2737 scalar(falseop);
79072805
LW		 2738 }
2739 Newz(1101, condop, 1, CONDOP);
2740
2741 condop->op_type = OP_COND_EXPR;
2742 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
2743 condop->op_first = first;
2744 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 2745 condop->op_true = LINKLIST(trueop);
2746 condop->op_false = LINKLIST(falseop);
c07a80fd 2747 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2748
2749 /* establish postfix order */
2750 condop->op_next = LINKLIST(first);
2751 first->op_next = (OP*)condop;
2752
b1cb66bf 2753 first->op_sibling = trueop;
2754 trueop->op_sibling = falseop;
11343788 2755 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 2756
5dc0d613
MB		 2757 trueop->op_next = o;
2758 falseop->op_next = o;
79072805 2759
11343788 2760 return o;
79072805
LW		 2761}
2762
2763OP *
8ac85365 2764newRANGE(I32 flags, OP *left, OP *right)
79072805 2765{
b35b2403 2766 dTHR;
79072805
LW		 2767 CONDOP *condop;
2768 OP *flip;
2769 OP *flop;
11343788 2770 OP *o;
79072805
LW		 2771
2772 Newz(1101, condop, 1, CONDOP);
2773
2774 condop->op_type = OP_RANGE;
2775 condop->op_ppaddr = ppaddr[OP_RANGE];
2776 condop->op_first = left;
2777 condop->op_flags = OPf_KIDS;
2778 condop->op_true = LINKLIST(left);
2779 condop->op_false = LINKLIST(right);
c07a80fd 2780 condop->op_private = 1 | (flags >> 8);
79072805
LW		 2781
2782 left->op_sibling = right;
2783
2784 condop->op_next = (OP*)condop;
2785 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
2786 flop = newUNOP(OP_FLOP, 0, flip);
11343788 2787 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 2788 linklist(flop);
2789
2790 left->op_next = flip;
2791 right->op_next = flop;
2792
ed6116ce 2793 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 2794 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 2795 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 2796 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
2797
2798 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2799 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
2800
11343788 2801 flip->op_next = o;
79072805 2802 if (!flip->op_private || !flop->op_private)
11343788 2803 linklist(o); /* blow off optimizer unless constant */
79072805 2804
11343788 2805 return o;
79072805
LW		 2806}
2807
2808OP *
8ac85365 2809newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 2810{
11343788 2811 dTHR;
463ee0b2 2812 OP* listop;
11343788 2813 OP* o;
463ee0b2 2814 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 2815 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 2816
463ee0b2
LW		 2817 if (expr) {
2818 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
2819 return block; /* do {} while 0 does once */
fb73857a 2820 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2821 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 2822 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2823 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
774d564b 2824 }
463ee0b2 2825 }
93a17b20 2826
8990e307 2827 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 2828 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 2829
883ffac3
CS		 2830 if (listop)
2831 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 2832
11343788
MB		 2833 if (once && o != listop)
2834 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 2835
11343788
MB		 2836 if (o == listop)
2837 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 2838
11343788
MB		 2839 o->op_flags |= flags;
2840 o = scope(o);
2841 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
2842 return o;
79072805
LW		 2843}
2844
2845OP *
8ac85365 2846newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 2847{
11343788 2848 dTHR;
79072805
LW		 2849 OP *redo;
2850 OP *next = 0;
2851 OP *listop;
11343788 2852 OP *o;
79072805
LW		 2853 OP *condop;
2854
fb73857a 2855 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
2856 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 2857 expr = newUNOP(OP_DEFINED, 0,
54b9620d 2858 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
748a9306 2859 }
79072805
LW		 2860
2861 if (!block)
2862 block = newOP(OP_NULL, 0);
2863
2864 if (cont)
2865 next = LINKLIST(cont);
fb73857a 2866 if (expr) {
79072805 2867 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 2868 if ((line_t)whileline != NOLINE) {
2869 copline = whileline;
2870 cont = append_elem(OP_LINESEQ, cont,
2871 newSTATEOP(0, Nullch, Nullop));
2872 }
2873 }
79072805 2874
463ee0b2 2875 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 2876 redo = LINKLIST(listop);
2877
2878 if (expr) {
883ffac3
CS		 2879 copline = whileline;
2880 scalar(listop);
2881 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 2882 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 2883 op_free(expr); /* oops, it's a while (0) */
463ee0b2 2884 op_free((OP*)loop);
883ffac3 2885 return Nullop; /* listop already freed by new_logop */
463ee0b2 2886 }
883ffac3
CS		 2887 if (listop)
2888 ((LISTOP*)listop)->op_last->op_next = condop =
2889 (o == listop ? redo : LINKLIST(o));
79072805
LW		 2890 if (!next)
2891 next = condop;
2892 }
2893 else
11343788 2894 o = listop;
79072805
LW		 2895
2896 if (!loop) {
2897 Newz(1101,loop,1,LOOP);
2898 loop->op_type = OP_ENTERLOOP;
2899 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
2900 loop->op_private = 0;
2901 loop->op_next = (OP*)loop;
2902 }
2903
11343788 2904 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 2905
2906 loop->op_redoop = redo;
11343788 2907 loop->op_lastop = o;
79072805
LW		 2908
2909 if (next)
2910 loop->op_nextop = next;
2911 else
11343788 2912 loop->op_nextop = o;
79072805 2913
11343788
MB		 2914 o->op_flags |= flags;
2915 o->op_private |= (flags >> 8);
2916 return o;
79072805
LW		 2917}
2918
2919OP *
8990e307 2920newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 2921{
2922 LOOP *loop;
fb73857a 2923 OP *wop;
85e6fe83 2924 int padoff = 0;
4633a7c4 2925 I32 iterflags = 0;
79072805 2926
79072805 2927 if (sv) {
85e6fe83 2928 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 2929 sv->op_type = OP_RV2GV;
2930 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 2931 }
85e6fe83
LW		 2932 else if (sv->op_type == OP_PADSV) { /* private variable */
2933 padoff = sv->op_targ;
2934 op_free(sv);
2935 sv = Nullop;
2936 }
54b9620d
MB		 2937 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
2938 padoff = sv->op_targ;
2939 iterflags |= OPf_SPECIAL;
2940 op_free(sv);
2941 sv = Nullop;
2942 }
79072805 2943 else
c07a80fd 2944 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 2945 }
2946 else {
54b9620d
MB		 2947#ifdef USE_THREADS
2948 padoff = find_threadsv("_");
2949 iterflags |= OPf_SPECIAL;
2950#else
79072805 2951 sv = newGVOP(OP_GV, 0, defgv);
54b9620d 2952#endif
79072805 2953 }
5f05dabc 2954 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
4633a7c4
LW		 2955 expr = scalar(ref(expr, OP_ITER));
2956 iterflags |= OPf_STACKED;
2957 }
2958 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
a0d0e21e
LW		 2959 append_elem(OP_LIST, mod(force_list(expr), OP_GREPSTART),
2960 scalar(sv))));
85e6fe83
LW		 2961 assert(!loop->op_next);
2962 Renew(loop, 1, LOOP);
2963 loop->op_targ = padoff;
fb73857a 2964 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
2965 copline = forline;
2966 return newSTATEOP(0, label, wop);
79072805
LW		 2967}
2968
8990e307 2969OP*
8ac85365 2970newLOOPEX(I32 type, OP *label)
8990e307 2971{
11343788
MB		 2972 dTHR;
2973 OP *o;
8990e307 2974 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 2975 /* "last()" means "last" */
2976 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
2977 o = newOP(type, OPf_SPECIAL);
2978 else {
2979 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
2980 ? SvPVx(((SVOP*)label)->op_sv, na)
2981 : ""));
2982 }
8990e307
LW		 2983 op_free(label);
2984 }
2985 else {
a0d0e21e
LW		 2986 if (label->op_type == OP_ENTERSUB)
2987 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 2988 o = newUNOP(type, OPf_STACKED, label);
8990e307 2989 }
85e6fe83 2990 hints |= HINT_BLOCK_SCOPE;
11343788 2991 return o;
8990e307
LW		 2992}
2993
79072805 2994void
8ac85365 2995cv_undef(CV *cv)
79072805 2996{
11343788
MB		 2997 dTHR;
2998#ifdef USE_THREADS
e858de61
MB		 2999 if (CvMUTEXP(cv)) {
3000 MUTEX_DESTROY(CvMUTEXP(cv));
3001 Safefree(CvMUTEXP(cv));
3002 CvMUTEXP(cv) = 0;
3003 }
11343788
MB		 3004#endif /* USE_THREADS */
3005
a0d0e21e 3006 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3007#ifdef USE_THREADS
3008 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3009 croak("Can't undef active subroutine");
3010#else
a0d0e21e
LW		 3011 if (CvDEPTH(cv))
3012 croak("Can't undef active subroutine");
11343788 3013#endif /* USE_THREADS */
8990e307 3014 ENTER;
a0d0e21e
LW		 3015
3016 SAVESPTR(curpad);
3017 curpad = 0;
3018
a5f75d66 3019 if (!CvCLONED(cv))
748a9306 3020 op_free(CvROOT(cv));
79072805 3021 CvROOT(cv) = Nullop;
8990e307 3022 LEAVE;
79072805 3023 }
1d5db326 3024 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3025 CvFLAGS(cv) = 0;
8e07c86e
AD		 3026 SvREFCNT_dec(CvGV(cv));
3027 CvGV(cv) = Nullgv;
3028 SvREFCNT_dec(CvOUTSIDE(cv));
3029 CvOUTSIDE(cv) = Nullcv;
3030 if (CvPADLIST(cv)) {
8ebc5c01 3031 /* may be during global destruction */
3032 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3033 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3034 while (i >= 0) {
3035 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3036 SV* sv = svp ? *svp : Nullsv;
3037 if (!sv)
3038 continue;
3039 if (sv == (SV*)comppad_name)
3040 comppad_name = Nullav;
3041 else if (sv == (SV*)comppad) {
3042 comppad = Nullav;
3043 curpad = Null(SV**);
3044 }
3045 SvREFCNT_dec(sv);
8ebc5c01 3046 }
3047 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3048 }
8e07c86e
AD		 3049 CvPADLIST(cv) = Nullav;
3050 }
79072805
LW		 3051}
3052
5f05dabc 3053#ifdef DEBUG_CLOSURES
3054static void
3055cv_dump(cv)
3056CV* cv;
3057{
3058 CV *outside = CvOUTSIDE(cv);
3059 AV* padlist = CvPADLIST(cv);
4fdae800 3060 AV* pad_name;
3061 AV* pad;
3062 SV** pname;
3063 SV** ppad;
5f05dabc 3064 I32 ix;
3065
fb73857a 3066 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3067 cv,
3068 (CvANON(cv) ? "ANON"
3069 : (cv == main_cv) ? "MAIN"
07055b4c 3070 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3071 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3072 outside,
3073 (!outside ? "null"
3074 : CvANON(outside) ? "ANON"
3075 : (outside == main_cv) ? "MAIN"
07055b4c 3076 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3077 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3078
4fdae800 3079 if (!padlist)
3080 return;
3081
3082 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3083 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3084 pname = AvARRAY(pad_name);
3085 ppad = AvARRAY(pad);
3086
93965878 3087 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3088 if (SvPOK(pname[ix]))
fb73857a 3089 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3090 ix, ppad[ix],
3091 SvFAKE(pname[ix]) ? "FAKE " : "",
3092 SvPVX(pname[ix]),
ab50184a
CS		 3093 (long)I_32(SvNVX(pname[ix])),
3094 (long)SvIVX(pname[ix]));
5f05dabc 3095 }
3096}
3097#endif /* DEBUG_CLOSURES */
3098
3099static CV *
8ac85365 3100cv_clone2(CV *proto, CV *outside)
748a9306 3101{
11343788 3102 dTHR;
748a9306
LW		 3103 AV* av;
3104 I32 ix;
3105 AV* protopadlist = CvPADLIST(proto);
3106 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3107 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3108 SV** pname = AvARRAY(protopad_name);
3109 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3110 I32 fname = AvFILLp(protopad_name);
3111 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3112 AV* comppadlist;
3113 CV* cv;
3114
07055b4c
CS		 3115 assert(!CvUNIQUE(proto));
3116
748a9306
LW		 3117 ENTER;
3118 SAVESPTR(curpad);
3119 SAVESPTR(comppad);
46fc3d4c 3120 SAVESPTR(comppad_name);
748a9306
LW		 3121 SAVESPTR(compcv);
3122
3123 cv = compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3124 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3125 CvCLONED_on(cv);
5f05dabc 3126 if (CvANON(proto))
3127 CvANON_on(cv);
748a9306 3128
11343788 3129#ifdef USE_THREADS
12ca11f6 3130 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3131 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3132 CvOWNER(cv) = 0;
3133#endif /* USE_THREADS */
748a9306 3134 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3135 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3136 CvSTASH(cv) = CvSTASH(proto);
3137 CvROOT(cv) = CvROOT(proto);
3138 CvSTART(cv) = CvSTART(proto);
5f05dabc 3139 if (outside)
3140 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3141
68dc0745 3142 if (SvPOK(proto))
3143 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3144
46fc3d4c 3145 comppad_name = newAV();
3146 for (ix = fname; ix >= 0; ix--)
3147 av_store(comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306
LW		 3148
3149 comppad = newAV();
3150
3151 comppadlist = newAV();
3152 AvREAL_off(comppadlist);
46fc3d4c 3153 av_store(comppadlist, 0, (SV*)comppad_name);
b355b4e0 3154 av_store(comppadlist, 1, (SV*)comppad);
748a9306 3155 CvPADLIST(cv) = comppadlist;
93965878 3156 av_fill(comppad, AvFILLp(protopad));
748a9306
LW		 3157 curpad = AvARRAY(comppad);
3158
3159 av = newAV(); /* will be @_ */
3160 av_extend(av, 0);
3161 av_store(comppad, 0, (SV*)av);
3162 AvFLAGS(av) = AVf_REIFY;
3163
9607fc9c 3164 for (ix = fpad; ix > 0; ix--) {
3165 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3166 if (namesv && namesv != &sv_undef) {
3167 char *name = SvPVX(namesv); /* XXX */
3168 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3169 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3170 CvOUTSIDE(cv), cxstack_ix);
3171 if (!off)
3172 curpad[ix] = SvREFCNT_inc(ppad[ix]);
3173 else if (off != ix)
748a9306
LW		 3174 croak("panic: cv_clone: %s", name);
3175 }
3176 else { /* our own lexical */
aa689395 3177 SV* sv;
5f05dabc 3178 if (*name == '&') {
3179 /* anon code -- we'll come back for it */
3180 sv = SvREFCNT_inc(ppad[ix]);
3181 }
3182 else if (*name == '@')
3183 sv = (SV*)newAV();
748a9306 3184 else if (*name == '%')
5f05dabc 3185 sv = (SV*)newHV();
748a9306 3186 else
5f05dabc 3187 sv = NEWSV(0,0);
3188 if (!SvPADBUSY(sv))
3189 SvPADMY_on(sv);
3190 curpad[ix] = sv;
748a9306
LW		 3191 }
3192 }
3193 else {
aa689395 3194 SV* sv = NEWSV(0,0);
748a9306 3195 SvPADTMP_on(sv);
5f05dabc 3196 curpad[ix] = sv;
748a9306
LW		 3197 }
3198 }
3199
5f05dabc 3200 /* Now that vars are all in place, clone nested closures. */
3201
9607fc9c 3202 for (ix = fpad; ix > 0; ix--) {
3203 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3204 if (namesv
3205 && namesv != &sv_undef
3206 && !(SvFLAGS(namesv) & SVf_FAKE)
3207 && *SvPVX(namesv) == '&'
5f05dabc 3208 && CvCLONE(ppad[ix]))
3209 {
3210 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3211 SvREFCNT_dec(ppad[ix]);
3212 CvCLONE_on(kid);
3213 SvPADMY_on(kid);
3214 curpad[ix] = (SV*)kid;
748a9306
LW		 3215 }
3216 }
3217
5f05dabc 3218#ifdef DEBUG_CLOSURES
ab50184a
CS		 3219 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3220 cv_dump(outside);
3221 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3222 cv_dump(proto);
ab50184a 3223 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3224 cv_dump(cv);
3225#endif
3226
748a9306
LW		 3227 LEAVE;
3228 return cv;
3229}
3230
3231CV *
8ac85365 3232cv_clone(CV *proto)
5f05dabc 3233{
3234 return cv_clone2(proto, CvOUTSIDE(proto));
3235}
3236
3fe9a6f1 3237void
8ac85365 3238cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3239{
3240 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3241 SV* msg = sv_newmortal();
3fe9a6f1 3242 SV* name = Nullsv;
3243
3244 if (gv)
46fc3d4c 3245 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3246 sv_setpv(msg, "Prototype mismatch:");
3247 if (name)
fc36a67e 3248 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3249 if (SvPOK(cv))
46fc3d4c 3250 sv_catpvf(msg, " (%s)", SvPVX(cv));
3251 sv_catpv(msg, " vs ");
3252 if (p)
3253 sv_catpvf(msg, "(%s)", p);
3254 else
3255 sv_catpv(msg, "none");
fc36a67e 3256 warn("%_", msg);
3fe9a6f1 3257 }
3258}
3259
760ac839 3260SV *
8ac85365 3261cv_const_sv(CV *cv)
760ac839
LW		 3262{
3263 OP *o;
54310121 3264 SV *sv;
aeea060c 3265
54310121 3266 if (!cv || !SvPOK(cv) || SvCUR(cv))
3267 return Nullsv;
760ac839 3268
54310121 3269 sv = Nullsv;
3270 for (o = CvSTART(cv); o; o = o->op_next) {
3271 OPCODE type = o->op_type;
3272
3273 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3274 continue;
3275 if (type == OP_LEAVESUB || type == OP_RETURN)
3276 break;
3277 if (sv)
3278 return Nullsv;
3279 if (type == OP_CONST)
5dc0d613 3280 sv = cSVOPo->op_sv;
54310121 3281 else if (type == OP_PADSV) {
e858de61
MB		 3282 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3283 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3284 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3285 return Nullsv;
760ac839 3286 }
54310121 3287 else
3288 return Nullsv;
760ac839 3289 }
5aabfad6 3290 if (sv)
3291 SvREADONLY_on(sv);
760ac839
LW		 3292 return sv;
3293}
3294
748a9306 3295CV *
8ac85365 3296newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3297{
11343788 3298 dTHR;
5dc0d613 3299 char *name = o ? SvPVx(cSVOPo->op_sv, na) : Nullch;
44a8e56a 3300 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
3fe9a6f1 3301 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, na) : Nullch;
79072805 3302 register CV *cv;
a0d0e21e 3303 I32 ix;
79072805 3304
11343788 3305 if (o)
5dc0d613 3306 SAVEFREEOP(o);
3fe9a6f1 3307 if (proto)
3308 SAVEFREEOP(proto);
3309
68dc0745 3310 if (!name || GvCVGEN(gv))
3311 cv = Nullcv;
3312 else if (cv = GvCV(gv)) {
3fe9a6f1 3313 cv_ckproto(cv, gv, ps);
68dc0745 3314 /* already defined (or promised)? */
3315 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3316 SV* const_sv;
aa689395 3317 if (!block) {
3318 /* just a "sub foo;" when &foo is already defined */
3319 SAVEFREESV(compcv);
3320 goto done;
3321 }
7bac28a0 3322 /* ahem, death to those who redefine active sort subs */
3323 if (curstack == sortstack && sortcop == CvSTART(cv))
3324 croak("Can't redefine active sort subroutine %s", name);
68dc0745 3325 const_sv = cv_const_sv(cv);
44a8e56a 3326 if (const_sv || dowarn) {
79072805 3327 line_t oldline = curcop->cop_line;
79072805 3328 curcop->cop_line = copline;
760ac839 3329 warn(const_sv ? "Constant subroutine %s redefined"
68dc0745 3330 : "Subroutine %s redefined", name);
79072805
LW		 3331 curcop->cop_line = oldline;
3332 }
8990e307 3333 SvREFCNT_dec(cv);
68dc0745 3334 cv = Nullcv;
79072805
LW		 3335 }
3336 }
a0d0e21e 3337 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3338 cv_undef(cv);
44a8e56a 3339 CvFLAGS(cv) = CvFLAGS(compcv);
748a9306 3340 CvOUTSIDE(cv) = CvOUTSIDE(compcv);
e9a444f0 3341 CvOUTSIDE(compcv) = 0;
748a9306 3342 CvPADLIST(cv) = CvPADLIST(compcv);
4aa0a1f7 3343 CvPADLIST(compcv) = 0;
4633a7c4
LW		 3344 if (SvREFCNT(compcv) > 1) /* XXX Make closures transit through stub. */
3345 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc((SV*)cv);
748a9306 3346 SvREFCNT_dec(compcv);
a0d0e21e
LW		 3347 }
3348 else {
748a9306 3349 cv = compcv;
44a8e56a 3350 if (name) {
3351 GvCV(gv) = cv;
3352 GvCVGEN(gv) = 0;
3353 sub_generation++;
3354 }
a0d0e21e 3355 }
44a8e56a 3356 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805 3357 CvFILEGV(cv) = curcop->cop_filegv;
8990e307 3358 CvSTASH(cv) = curstash;
11343788
MB		 3359#ifdef USE_THREADS
3360 CvOWNER(cv) = 0;
12ca11f6 3361 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3362 MUTEX_INIT(CvMUTEXP(cv));
11343788 3363#endif /* USE_THREADS */
8990e307 3364
3fe9a6f1 3365 if (ps)
3366 sv_setpv((SV*)cv, ps);
4633a7c4 3367
c07a80fd 3368 if (error_count) {
3369 op_free(block);
3370 block = Nullop;
68dc0745 3371 if (name) {
3372 char *s = strrchr(name, ':');
3373 s = s ? s+1 : name;
6d4c2119
CS		 3374 if (strEQ(s, "BEGIN")) {
3375 char *not_safe =
3376 "BEGIN not safe after errors--compilation aborted";
3377 if (in_eval & 4)
3378 croak(not_safe);
3379 else {
3380 /* force display of errors found but not reported */
38a03e6e
MB		 3381 sv_catpv(ERRSV, not_safe);
3382 croak("%s", SvPVx(ERRSV, na));
6d4c2119
CS		 3383 }
3384 }
68dc0745 3385 }
c07a80fd 3386 }
a0d0e21e 3387 if (!block) {
a0d0e21e
LW		 3388 copline = NOLINE;
3389 LEAVE_SCOPE(floor);
3390 return cv;
3391 }
3392
93965878
NIS		 3393 if (AvFILLp(comppad_name) < AvFILLp(comppad))
3394 av_store(comppad_name, AvFILLp(comppad), Nullsv);
a0d0e21e 3395
54310121 3396 if (CvCLONE(cv)) {
3397 SV **namep = AvARRAY(comppad_name);
93965878 3398 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3399 SV *namesv;
3400
3401 if (SvIMMORTAL(curpad[ix]))
3402 continue;
3403 /*
3404 * The only things that a clonable function needs in its
3405 * pad are references to outer lexicals and anonymous subs.
3406 * The rest are created anew during cloning.
3407 */
3408 if (!((namesv = namep[ix]) != Nullsv &&
3409 namesv != &sv_undef &&
3410 (SvFAKE(namesv) ||
3411 *SvPVX(namesv) == '&')))
3412 {
3413 SvREFCNT_dec(curpad[ix]);
3414 curpad[ix] = Nullsv;
3415 }
3416 }
a0d0e21e 3417 }
54310121 3418 else {
3419 AV *av = newAV(); /* Will be @_ */
3420 av_extend(av, 0);
3421 av_store(comppad, 0, (SV*)av);
3422 AvFLAGS(av) = AVf_REIFY;
79072805 3423
93965878 3424 for (ix = AvFILLp(comppad); ix > 0; ix--) {
54310121 3425 if (SvIMMORTAL(curpad[ix]))
3426 continue;
3427 if (!SvPADMY(curpad[ix]))
3428 SvPADTMP_on(curpad[ix]);
3429 }
3430 }
79072805 3431
a0d0e21e 3432 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3433 CvSTART(cv) = LINKLIST(CvROOT(cv));
3434 CvROOT(cv)->op_next = 0;
3435 peep(CvSTART(cv));
93a17b20 3436
44a8e56a 3437 if (name) {
3438 char *s;
3439
84902520 3440 if (PERLDB_SUBLINE && curstash != debstash) {
46fc3d4c 3441 SV *sv = NEWSV(0,0);
44a8e56a 3442 SV *tmpstr = sv_newmortal();
549bb64a 3443 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3444 CV *cv;
3445 HV *hv;
3446
51790459
MB		 3447 sv_setpvf(sv, "%_:%ld-%ld",
3448 GvSV(curcop->cop_filegv),
3449 (long)subline, (long)curcop->cop_line);
44a8e56a 3450 gv_efullname3(tmpstr, gv, Nullch);
3451 hv_store(GvHV(DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3452 hv = GvHVn(db_postponed);
9607fc9c 3453 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3454 && (cv = GvCV(db_postponed))) {
44a8e56a 3455 dSP;
3456 PUSHMARK(sp);
3457 XPUSHs(tmpstr);
3458 PUTBACK;
3459 perl_call_sv((SV*)cv, G_DISCARD);
3460 }
3461 }
79072805 3462
44a8e56a 3463 if ((s = strrchr(name,':')))
28757baa 3464 s++;
3465 else
3466 s = name;
68dc0745 3467 if (strEQ(s, "BEGIN")) {
2ae324a7 3468 I32 oldscope = scopestack_ix;
28757baa 3469 ENTER;
3470 SAVESPTR(compiling.cop_filegv);
3471 SAVEI16(compiling.cop_line);
3472 SAVEI32(perldb);
3473 save_svref(&rs);
3474 sv_setsv(rs, nrs);
3475
3476 if (!beginav)
3477 beginav = newAV();
3478 DEBUG_x( dump_sub(gv) );
3479 av_push(beginav, (SV *)cv);
3480 GvCV(gv) = 0;
68dc0745 3481 call_list(oldscope, beginav);
a6006777 3482
28757baa 3483 curcop = &compiling;
3484 LEAVE;
3485 }
3486 else if (strEQ(s, "END") && !error_count) {
3487 if (!endav)
3488 endav = newAV();
3489 av_unshift(endav, 1);
3490 av_store(endav, 0, (SV *)cv);
3491 GvCV(gv) = 0;
3492 }
7d07dbc2
MB		 3493 else if (strEQ(s, "INIT") && !error_count) {
3494 if (!initav)
3495 initav = newAV();
3496 av_push(initav, SvREFCNT_inc(cv));
ae77835f 3497 }
79072805 3498 }
a6006777 3499
aa689395 3500 done:
79072805 3501 copline = NOLINE;
8990e307 3502 LEAVE_SCOPE(floor);
a0d0e21e 3503 return cv;
79072805
LW		 3504}
3505
57d3b86d 3506CV *
aeea060c 3507newXS(char *name, void (*subaddr) (CV *), char *filename)
a0d0e21e 3508{
11343788 3509 dTHR;
44a8e56a 3510 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 3511 register CV *cv;
44a8e56a 3512
3513 if (cv = (name ? GvCV(gv) : Nullcv)) {
3514 if (GvCVGEN(gv)) {
3515 /* just a cached method */
3516 SvREFCNT_dec(cv);
3517 cv = 0;
3518 }
3519 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3520 /* already defined (or promised) */
a0d0e21e
LW		 3521 if (dowarn) {
3522 line_t oldline = curcop->cop_line;
a0d0e21e
LW		 3523 curcop->cop_line = copline;
3524 warn("Subroutine %s redefined",name);
3525 curcop->cop_line = oldline;
3526 }
3527 SvREFCNT_dec(cv);
3528 cv = 0;
79072805 3529 }
79072805 3530 }
44a8e56a 3531
3532 if (cv) /* must reuse cv if autoloaded */
3533 cv_undef(cv);
a0d0e21e
LW		 3534 else {
3535 cv = (CV*)NEWSV(1105,0);
3536 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 3537 if (name) {
3538 GvCV(gv) = cv;
3539 GvCVGEN(gv) = 0;
3540 sub_generation++;
3541 }
a0d0e21e 3542 }
5196be3e 3543 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 3544#ifdef USE_THREADS
12ca11f6 3545 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3546 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3547 CvOWNER(cv) = 0;
3548#endif /* USE_THREADS */
79072805 3549 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 3550 CvXSUB(cv) = subaddr;
44a8e56a 3551
28757baa 3552 if (name) {
3553 char *s = strrchr(name,':');
3554 if (s)
3555 s++;
3556 else
3557 s = name;
3558 if (strEQ(s, "BEGIN")) {
3559 if (!beginav)
3560 beginav = newAV();
44a8e56a 3561 av_push(beginav, (SV *)cv);
3562 GvCV(gv) = 0;
28757baa 3563 }
3564 else if (strEQ(s, "END")) {
3565 if (!endav)
3566 endav = newAV();
3567 av_unshift(endav, 1);
44a8e56a 3568 av_store(endav, 0, (SV *)cv);
3569 GvCV(gv) = 0;
28757baa 3570 }
7d07dbc2
MB		 3571 else if (strEQ(s, "INIT")) {
3572 if (!initav)
3573 initav = newAV();
3574 av_push(initav, (SV *)cv);
ae77835f 3575 }
28757baa 3576 }
8990e307 3577 else
a5f75d66 3578 CvANON_on(cv);
44a8e56a 3579
a0d0e21e 3580 return cv;
79072805
LW		 3581}
3582
3583void
8ac85365 3584newFORM(I32 floor, OP *o, OP *block)
79072805 3585{
11343788 3586 dTHR;
79072805
LW		 3587 register CV *cv;
3588 char *name;
3589 GV *gv;
a0d0e21e 3590 I32 ix;
79072805 3591
11343788
MB		 3592 if (o)
3593 name = SvPVx(cSVOPo->op_sv, na);
79072805
LW		 3594 else
3595 name = "STDOUT";
85e6fe83 3596 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 3597 GvMULTI_on(gv);
79072805
LW		 3598 if (cv = GvFORM(gv)) {
3599 if (dowarn) {
3600 line_t oldline = curcop->cop_line;
3601
3602 curcop->cop_line = copline;
3603 warn("Format %s redefined",name);
3604 curcop->cop_line = oldline;
3605 }
8990e307 3606 SvREFCNT_dec(cv);
79072805 3607 }
748a9306 3608 cv = compcv;
79072805 3609 GvFORM(gv) = cv;
44a8e56a 3610 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
79072805
LW		 3611 CvFILEGV(cv) = curcop->cop_filegv;
3612
93965878 3613 for (ix = AvFILLp(comppad); ix > 0; ix--) {
44a8e56a 3614 if (!SvPADMY(curpad[ix]) && !SvIMMORTAL(curpad[ix]))
a0d0e21e
LW		 3615 SvPADTMP_on(curpad[ix]);
3616 }
3617
79072805
LW		 3618 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
3619 CvSTART(cv) = LINKLIST(CvROOT(cv));
3620 CvROOT(cv)->op_next = 0;
3621 peep(CvSTART(cv));
11343788 3622 op_free(o);
79072805 3623 copline = NOLINE;
8990e307 3624 LEAVE_SCOPE(floor);
79072805
LW		 3625}
3626
3627OP *
8ac85365 3628newANONLIST(OP *o)
79072805 3629{
93a17b20 3630 return newUNOP(OP_REFGEN, 0,
11343788 3631 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 3632}
3633
3634OP *
8ac85365 3635newANONHASH(OP *o)
79072805 3636{
93a17b20 3637 return newUNOP(OP_REFGEN, 0,
11343788 3638 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 3639}
3640
3641OP *
8ac85365 3642newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 3643{
3644 return newUNOP(OP_REFGEN, 0,
4633a7c4 3645 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 3646}
3647
3648OP *
8ac85365 3649oopsAV(OP *o)
79072805 3650{
ed6116ce
LW		 3651 switch (o->op_type) {
3652 case OP_PADSV:
3653 o->op_type = OP_PADAV;
3654 o->op_ppaddr = ppaddr[OP_PADAV];
3655 return ref(newUNOP(OP_RV2AV, 0, scalar(o)), OP_RV2AV);
3656
3657 case OP_RV2SV:
79072805
LW		 3658 o->op_type = OP_RV2AV;
3659 o->op_ppaddr = ppaddr[OP_RV2AV];
3660 ref(o, OP_RV2AV);
ed6116ce
LW		 3661 break;
3662
3663 default:
79072805 3664 warn("oops: oopsAV");
ed6116ce
LW		 3665 break;
3666 }
79072805
LW		 3667 return o;
3668}
3669
3670OP *
8ac85365 3671oopsHV(OP *o)
79072805 3672{
ed6116ce
LW		 3673 switch (o->op_type) {
3674 case OP_PADSV:
3675 case OP_PADAV:
3676 o->op_type = OP_PADHV;
3677 o->op_ppaddr = ppaddr[OP_PADHV];
3678 return ref(newUNOP(OP_RV2HV, 0, scalar(o)), OP_RV2HV);
3679
3680 case OP_RV2SV:
3681 case OP_RV2AV:
79072805
LW		 3682 o->op_type = OP_RV2HV;
3683 o->op_ppaddr = ppaddr[OP_RV2HV];
3684 ref(o, OP_RV2HV);
ed6116ce
LW		 3685 break;
3686
3687 default:
79072805 3688 warn("oops: oopsHV");
ed6116ce
LW		 3689 break;
3690 }
79072805
LW		 3691 return o;
3692}
3693
3694OP *
8ac85365 3695newAVREF(OP *o)
79072805 3696{
ed6116ce
LW		 3697 if (o->op_type == OP_PADANY) {
3698 o->op_type = OP_PADAV;
3699 o->op_ppaddr = ppaddr[OP_PADAV];
93a17b20 3700 return o;
ed6116ce 3701 }
79072805
LW		 3702 return newUNOP(OP_RV2AV, 0, scalar(o));
3703}
3704
3705OP *
8ac85365 3706newGVREF(I32 type, OP *o)
79072805 3707{
a0d0e21e
LW		 3708 if (type == OP_MAPSTART)
3709 return newUNOP(OP_NULL, 0, o);
748a9306 3710 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 3711}
3712
3713OP *
8ac85365 3714newHVREF(OP *o)
79072805 3715{
ed6116ce
LW		 3716 if (o->op_type == OP_PADANY) {
3717 o->op_type = OP_PADHV;
3718 o->op_ppaddr = ppaddr[OP_PADHV];
93a17b20 3719 return o;
ed6116ce 3720 }
79072805
LW		 3721 return newUNOP(OP_RV2HV, 0, scalar(o));
3722}
3723
3724OP *
8ac85365 3725oopsCV(OP *o)
79072805 3726{
463ee0b2 3727 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 3728 /* STUB */
3729 return o;
3730}
3731
3732OP *
8ac85365 3733newCVREF(I32 flags, OP *o)
79072805 3734{
c07a80fd 3735 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 3736}
3737
3738OP *
8ac85365 3739newSVREF(OP *o)
79072805 3740{
ed6116ce
LW		 3741 if (o->op_type == OP_PADANY) {
3742 o->op_type = OP_PADSV;
3743 o->op_ppaddr = ppaddr[OP_PADSV];
93a17b20 3744 return o;
ed6116ce 3745 }
224a4551
MB		 3746 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
3747 o->op_flags |= OPpDONE_SVREF;
a863c7d1 3748 return o;
224a4551 3749 }
79072805
LW		 3750 return newUNOP(OP_RV2SV, 0, scalar(o));
3751}
3752
3753/* Check routines. */
3754
3755OP *
8ac85365 3756ck_anoncode(OP *o)
5f05dabc 3757{
178c6305
CS		 3758 PADOFFSET ix;
3759 SV* name;
3760
3761 name = NEWSV(1106,0);
3762 sv_upgrade(name, SVt_PVNV);
3763 sv_setpvn(name, "&", 1);
3764 SvIVX(name) = -1;
3765 SvNVX(name) = 1;
5dc0d613 3766 ix = pad_alloc(o->op_type, SVs_PADMY);
178c6305 3767 av_store(comppad_name, ix, name);
5dc0d613
MB		 3768 av_store(comppad, ix, cSVOPo->op_sv);
3769 SvPADMY_on(cSVOPo->op_sv);
3770 cSVOPo->op_sv = Nullsv;
3771 cSVOPo->op_targ = ix;
3772 return o;
5f05dabc 3773}
3774
3775OP *
8ac85365 3776ck_bitop(OP *o)
55497cff 3777{
5dc0d613
MB		 3778 o->op_private = hints;
3779 return o;
55497cff 3780}
3781
3782OP *
8ac85365 3783ck_concat(OP *o)
79072805 3784{
11343788
MB		 3785 if (cUNOPo->op_first->op_type == OP_CONCAT)
3786 o->op_flags |= OPf_STACKED;
3787 return o;
79072805
LW		 3788}
3789
3790OP *
8ac85365 3791ck_spair(OP *o)
79072805 3792{
11343788 3793 if (o->op_flags & OPf_KIDS) {
79072805 3794 OP* newop;
a0d0e21e 3795 OP* kid;
5dc0d613
MB		 3796 OPCODE type = o->op_type;
3797 o = modkids(ck_fun(o), type);
11343788 3798 kid = cUNOPo->op_first;
a0d0e21e
LW		 3799 newop = kUNOP->op_first->op_sibling;
3800 if (newop &&
3801 (newop->op_sibling ||
3802 !(opargs[newop->op_type] & OA_RETSCALAR) ||
3803 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
3804 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 3805
11343788 3806 return o;
a0d0e21e
LW		 3807 }
3808 op_free(kUNOP->op_first);
3809 kUNOP->op_first = newop;
3810 }
11343788
MB		 3811 o->op_ppaddr = ppaddr[++o->op_type];
3812 return ck_fun(o);
a0d0e21e
LW		 3813}
3814
3815OP *
8ac85365 3816ck_delete(OP *o)
a0d0e21e 3817{
11343788 3818 o = ck_fun(o);
5dc0d613 3819 o->op_private = 0;
11343788
MB		 3820 if (o->op_flags & OPf_KIDS) {
3821 OP *kid = cUNOPo->op_first;
5f05dabc 3822 if (kid->op_type == OP_HSLICE)
5dc0d613 3823 o->op_private |= OPpSLICE;
5f05dabc 3824 else if (kid->op_type != OP_HELEM)
3825 croak("%s argument is not a HASH element or slice",
5dc0d613 3826 op_desc[o->op_type]);
a0d0e21e 3827 null(kid);
79072805 3828 }
11343788 3829 return o;
79072805
LW		 3830}
3831
3832OP *
8ac85365 3833ck_eof(OP *o)
79072805 3834{
11343788 3835 I32 type = o->op_type;
79072805 3836
11343788
MB		 3837 if (o->op_flags & OPf_KIDS) {
3838 if (cLISTOPo->op_first->op_type == OP_STUB) {
3839 op_free(o);
3840 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 3841 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 3842 }
11343788 3843 return ck_fun(o);
79072805 3844 }
11343788 3845 return o;
79072805
LW		 3846}
3847
3848OP *
8ac85365 3849ck_eval(OP *o)
79072805 3850{
85e6fe83 3851 hints |= HINT_BLOCK_SCOPE;
11343788
MB		 3852 if (o->op_flags & OPf_KIDS) {
3853 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 3854
93a17b20 3855 if (!kid) {
11343788
MB		 3856 o->op_flags &= ~OPf_KIDS;
3857 null(o);
79072805
LW		 3858 }
3859 else if (kid->op_type == OP_LINESEQ) {
3860 LOGOP *enter;
3861
11343788
MB		 3862 kid->op_next = o->op_next;
3863 cUNOPo->op_first = 0;
3864 op_free(o);
79072805
LW		 3865
3866 Newz(1101, enter, 1, LOGOP);
3867 enter->op_type = OP_ENTERTRY;
3868 enter->op_ppaddr = ppaddr[OP_ENTERTRY];
3869 enter->op_private = 0;
3870
3871 /* establish postfix order */
3872 enter->op_next = (OP*)enter;
3873
11343788
MB		 3874 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
3875 o->op_type = OP_LEAVETRY;
3876 o->op_ppaddr = ppaddr[OP_LEAVETRY];
3877 enter->op_other = o;
3878 return o;
79072805 3879 }
c7cc6f1c 3880 else
473986ff 3881 scalar((OP*)kid);
79072805
LW		 3882 }
3883 else {
11343788 3884 op_free(o);
54b9620d 3885 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 3886 }
11343788
MB		 3887 o->op_targ = (PADOFFSET)hints;
3888 return o;
79072805
LW		 3889}
3890
3891OP *
8ac85365 3892ck_exec(OP *o)
79072805
LW		 3893{
3894 OP *kid;
11343788
MB		 3895 if (o->op_flags & OPf_STACKED) {
3896 o = ck_fun(o);
3897 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 3898 if (kid->op_type == OP_RV2GV)
3899 null(kid);
79072805 3900 }
463ee0b2 3901 else
11343788
MB		 3902 o = listkids(o);
3903 return o;
79072805
LW		 3904}
3905
3906OP *
8ac85365 3907ck_exists(OP *o)
5f05dabc 3908{
5196be3e
MB		 3909 o = ck_fun(o);
3910 if (o->op_flags & OPf_KIDS) {
3911 OP *kid = cUNOPo->op_first;
5f05dabc 3912 if (kid->op_type != OP_HELEM)
5196be3e 3913 croak("%s argument is not a HASH element", op_desc[o->op_type]);
5f05dabc 3914 null(kid);
3915 }
5196be3e 3916 return o;
5f05dabc 3917}
3918
3919OP *
8ac85365 3920ck_gvconst(register OP *o)
79072805
LW		 3921{
3922 o = fold_constants(o);
3923 if (o->op_type == OP_CONST)
3924 o->op_type = OP_GV;
3925 return o;
3926}
3927
3928OP *
8ac85365 3929ck_rvconst(register OP *o)
79072805 3930{
11343788
MB		 3931 dTHR;
3932 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 3933
11343788 3934 o->op_private |= (hints & HINT_STRICT_REFS);
79072805 3935 if (kid->op_type == OP_CONST) {
44a8e56a 3936 char *name;
3937 int iscv;
3938 GV *gv;
3939
3940 name = SvPV(kid->op_sv, na);
3941 if ((hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
3942 char *badthing = Nullch;
5dc0d613 3943 switch (o->op_type) {
44a8e56a 3944 case OP_RV2SV:
3945 badthing = "a SCALAR";
3946 break;
3947 case OP_RV2AV:
3948 badthing = "an ARRAY";
3949 break;
3950 case OP_RV2HV:
3951 badthing = "a HASH";
3952 break;
3953 }
3954 if (badthing)
3955 croak(
3956 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
3957 name, badthing);
3958 }
79072805 3959 kid->op_type = OP_GV;
5196be3e 3960 iscv = (o->op_type == OP_RV2CV) * 2;
a0d0e21e 3961 for (gv = 0; !gv; iscv++) {
748a9306
LW		 3962 /*
3963 * This is a little tricky. We only want to add the symbol if we
3964 * didn't add it in the lexer. Otherwise we get duplicate strict
3965 * warnings. But if we didn't add it in the lexer, we must at
3966 * least pretend like we wanted to add it even if it existed before,
3967 * or we get possible typo warnings. OPpCONST_ENTERED says
3968 * whether the lexer already added THIS instance of this symbol.
3969 */
44a8e56a 3970 gv = gv_fetchpv(name,
748a9306 3971 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 3972 iscv
3973 ? SVt_PVCV
11343788 3974 : o->op_type == OP_RV2SV
a0d0e21e 3975 ? SVt_PV
11343788 3976 : o->op_type == OP_RV2AV
a0d0e21e 3977 ? SVt_PVAV
11343788 3978 : o->op_type == OP_RV2HV
a0d0e21e
LW		 3979 ? SVt_PVHV
3980 : SVt_PVGV);
3981 }
adbc6bb1 3982 SvREFCNT_dec(kid->op_sv);
a0d0e21e 3983 kid->op_sv = SvREFCNT_inc(gv);
79072805 3984 }
11343788 3985 return o;
79072805
LW		 3986}
3987
3988OP *
8ac85365 3989ck_ftst(OP *o)
79072805 3990{
11343788
MB		 3991 dTHR;
3992 I32 type = o->op_type;
79072805 3993
11343788
MB		 3994 if (o->op_flags & OPf_REF)
3995 return o;
79072805 3996
11343788
MB		 3997 if (o->op_flags & OPf_KIDS) {
3998 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 3999
4000 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4001 OP *newop = newGVOP(type, OPf_REF,
85e6fe83 4002 gv_fetchpv(SvPVx(kid->op_sv, na), TRUE, SVt_PVIO));
11343788 4003 op_free(o);
79072805
LW		 4004 return newop;
4005 }
4006 }
4007 else {
11343788 4008 op_free(o);
79072805 4009 if (type == OP_FTTTY)
fb73857a 4010 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4011 SVt_PVIO));
79072805 4012 else
54b9620d 4013 return newUNOP(type, 0, newDEFSVOP());
79072805 4014 }
11343788 4015 return o;
79072805
LW		 4016}
4017
4018OP *
8ac85365 4019ck_fun(OP *o)
79072805 4020{
11343788 4021 dTHR;
79072805
LW		 4022 register OP *kid;
4023 OP **tokid;
4024 OP *sibl;
4025 I32 numargs = 0;
11343788 4026 int type = o->op_type;
a0d0e21e 4027 register I32 oa = opargs[type] >> OASHIFT;
aeea060c 4028
11343788 4029 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4030 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4031 oa &= ~OA_OPTIONAL;
4032 else
11343788 4033 return no_fh_allowed(o);
79072805
LW		 4034 }
4035
11343788
MB		 4036 if (o->op_flags & OPf_KIDS) {
4037 tokid = &cLISTOPo->op_first;
4038 kid = cLISTOPo->op_first;
8990e307
LW		 4039 if (kid->op_type == OP_PUSHMARK ||
4040 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4041 {
79072805
LW		 4042 tokid = &kid->op_sibling;
4043 kid = kid->op_sibling;
4044 }
a0d0e21e 4045 if (!kid && opargs[type] & OA_DEFGV)
54b9620d 4046 *tokid = kid = newDEFSVOP();
79072805
LW		 4047
4048 while (oa && kid) {
4049 numargs++;
4050 sibl = kid->op_sibling;
4051 switch (oa & 7) {
4052 case OA_SCALAR:
4053 scalar(kid);
4054 break;
4055 case OA_LIST:
4056 if (oa < 16) {
4057 kid = 0;
4058 continue;
4059 }
4060 else
4061 list(kid);
4062 break;
4063 case OA_AVREF:
4064 if (kid->op_type == OP_CONST &&
4065 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4066 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4067 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4068 gv_fetchpv(name, TRUE, SVt_PVAV) ));
463ee0b2 4069 if (dowarn)
ff0cee69 4070 warn("Array @%s missing the @ in argument %ld of %s()",
4071 name, (long)numargs, op_desc[type]);
79072805
LW		 4072 op_free(kid);
4073 kid = newop;
4074 kid->op_sibling = sibl;
4075 *tokid = kid;
4076 }
8990e307 4077 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
11343788 4078 bad_type(numargs, "array", op_desc[o->op_type], kid);
a0d0e21e 4079 mod(kid, type);
79072805
LW		 4080 break;
4081 case OA_HVREF:
4082 if (kid->op_type == OP_CONST &&
4083 (kid->op_private & OPpCONST_BARE)) {
463ee0b2 4084 char *name = SvPVx(((SVOP*)kid)->op_sv, na);
79072805 4085 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4086 gv_fetchpv(name, TRUE, SVt_PVHV) ));
463ee0b2 4087 if (dowarn)
ff0cee69 4088 warn("Hash %%%s missing the %% in argument %ld of %s()",
4089 name, (long)numargs, op_desc[type]);
79072805
LW		 4090 op_free(kid);
4091 kid = newop;
4092 kid->op_sibling = sibl;
4093 *tokid = kid;
4094 }
8990e307 4095 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
11343788 4096 bad_type(numargs, "hash", op_desc[o->op_type], kid);
a0d0e21e 4097 mod(kid, type);
79072805
LW		 4098 break;
4099 case OA_CVREF:
4100 {
a0d0e21e 4101 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4102 kid->op_sibling = 0;
4103 linklist(kid);
4104 newop->op_next = newop;
4105 kid = newop;
4106 kid->op_sibling = sibl;
4107 *tokid = kid;
4108 }
4109 break;
4110 case OA_FILEREF:
4111 if (kid->op_type != OP_GV) {
4112 if (kid->op_type == OP_CONST &&
4113 (kid->op_private & OPpCONST_BARE)) {
4114 OP *newop = newGVOP(OP_GV, 0,
85e6fe83
LW		 4115 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, na), TRUE,
4116 SVt_PVIO) );
79072805
LW		 4117 op_free(kid);
4118 kid = newop;
4119 }
4120 else {
4121 kid->op_sibling = 0;
4122 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4123 }
4124 kid->op_sibling = sibl;
4125 *tokid = kid;
4126 }
4127 scalar(kid);
4128 break;
4129 case OA_SCALARREF:
a0d0e21e 4130 mod(scalar(kid), type);
79072805
LW		 4131 break;
4132 }
4133 oa >>= 4;
4134 tokid = &kid->op_sibling;
4135 kid = kid->op_sibling;
4136 }
11343788 4137 o->op_private |= numargs;
79072805 4138 if (kid)
11343788
MB		 4139 return too_many_arguments(o,op_desc[o->op_type]);
4140 listkids(o);
79072805 4141 }
a0d0e21e 4142 else if (opargs[type] & OA_DEFGV) {
11343788 4143 op_free(o);
54b9620d 4144 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4145 }
4146
79072805
LW		 4147 if (oa) {
4148 while (oa & OA_OPTIONAL)
4149 oa >>= 4;
4150 if (oa && oa != OA_LIST)
11343788 4151 return too_few_arguments(o,op_desc[o->op_type]);
79072805 4152 }
11343788 4153 return o;
79072805
LW		 4154}
4155
4156OP *
8ac85365 4157ck_glob(OP *o)
79072805 4158{
fb73857a 4159 GV *gv;
4160
1f2bfc8a 4161 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4162 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4163
4164 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4165 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4166
4167 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4168 static int glob_index;
4169
5196be3e 4170 append_elem(OP_GLOB, o,
46fc3d4c 4171 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a
MB		 4172 o->op_type = OP_LIST;
4173 o->op_ppaddr = ppaddr[OP_LIST];
4174 cLISTOPo->op_first->op_type = OP_PUSHMARK;
4175 cLISTOPo->op_first->op_ppaddr = ppaddr[OP_PUSHMARK];
4176 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4177 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4178 scalar(newUNOP(OP_RV2CV, 0,
4179 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4180 o = newUNOP(OP_NULL, 0, ck_subr(o));
4181 o->op_targ = OP_GLOB; /* hint at what it used to be */
4182 return o;
b1cb66bf 4183 }
4184 gv = newGVgen("main");
a0d0e21e 4185 gv_IOadd(gv);
11343788
MB		 4186 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4187 scalarkids(o);
4188 return ck_fun(o);
79072805
LW		 4189}
4190
4191OP *
8ac85365 4192ck_grep(OP *o)
79072805
LW		 4193{
4194 LOGOP *gwop;
4195 OP *kid;
11343788 4196 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4197
11343788 4198 o->op_ppaddr = ppaddr[OP_GREPSTART];
a0d0e21e 4199 Newz(1101, gwop, 1, LOGOP);
aeea060c 4200
11343788 4201 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4202 OP* k;
11343788
MB		 4203 o = ck_sort(o);
4204 kid = cLISTOPo->op_first->op_sibling;
4205 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4206 kid = k;
4207 }
4208 kid->op_next = (OP*)gwop;
11343788 4209 o->op_flags &= ~OPf_STACKED;
93a17b20 4210 }
11343788 4211 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4212 if (type == OP_MAPWHILE)
4213 list(kid);
4214 else
4215 scalar(kid);
11343788 4216 o = ck_fun(o);
79072805 4217 if (error_count)
11343788 4218 return o;
aeea060c 4219 kid = cLISTOPo->op_first->op_sibling;
79072805 4220 if (kid->op_type != OP_NULL)
463ee0b2 4221 croak("panic: ck_grep");
79072805
LW		 4222 kid = kUNOP->op_first;
4223
a0d0e21e
LW		 4224 gwop->op_type = type;
4225 gwop->op_ppaddr = ppaddr[type];
11343788 4226 gwop->op_first = listkids(o);
79072805
LW		 4227 gwop->op_flags |= OPf_KIDS;
4228 gwop->op_private = 1;
4229 gwop->op_other = LINKLIST(kid);
a0d0e21e 4230 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4231 kid->op_next = (OP*)gwop;
4232
11343788 4233 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4234 if (!kid || !kid->op_sibling)
11343788 4235 return too_few_arguments(o,op_desc[o->op_type]);
a0d0e21e
LW		 4236 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4237 mod(kid, OP_GREPSTART);
4238
79072805
LW		 4239 return (OP*)gwop;
4240}
4241
4242OP *
8ac85365 4243ck_index(OP *o)
79072805 4244{
11343788
MB		 4245 if (o->op_flags & OPf_KIDS) {
4246 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
79072805 4247 if (kid && kid->op_type == OP_CONST)
bbce6d69 4248 fbm_compile(((SVOP*)kid)->op_sv);
79072805 4249 }
11343788 4250 return ck_fun(o);
79072805
LW		 4251}
4252
4253OP *
8ac85365 4254ck_lengthconst(OP *o)
79072805
LW		 4255{
4256 /* XXX length optimization goes here */
11343788 4257 return ck_fun(o);
79072805
LW		 4258}
4259
4260OP *
8ac85365 4261ck_lfun(OP *o)
79072805 4262{
5dc0d613
MB		 4263 OPCODE type = o->op_type;
4264 return modkids(ck_fun(o), type);
79072805
LW		 4265}
4266
4267OP *
8ac85365 4268ck_rfun(OP *o)
8990e307 4269{
5dc0d613
MB		 4270 OPCODE type = o->op_type;
4271 return refkids(ck_fun(o), type);
8990e307
LW		 4272}
4273
4274OP *
8ac85365 4275ck_listiob(OP *o)
79072805
LW		 4276{
4277 register OP *kid;
aeea060c 4278
11343788 4279 kid = cLISTOPo->op_first;
79072805 4280 if (!kid) {
11343788
MB		 4281 o = force_list(o);
4282 kid = cLISTOPo->op_first;
79072805
LW		 4283 }
4284 if (kid->op_type == OP_PUSHMARK)
4285 kid = kid->op_sibling;
11343788 4286 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4287 kid = kid->op_sibling;
4288 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4289 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4290 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4291 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4292 cLISTOPo->op_first->op_sibling = kid;
4293 cLISTOPo->op_last = kid;
79072805
LW		 4294 kid = kid->op_sibling;
4295 }
4296 }
4297
4298 if (!kid)
54b9620d 4299 append_elem(o->op_type, o, newDEFSVOP());
79072805 4300
5dc0d613 4301 o = listkids(o);
bbce6d69 4302
5dc0d613 4303 o->op_private = 0;
36477c24 4304#ifdef USE_LOCALE
bbce6d69 4305 if (hints & HINT_LOCALE)
5dc0d613 4306 o->op_private |= OPpLOCALE;
bbce6d69 4307#endif
4308
5dc0d613 4309 return o;
bbce6d69 4310}
4311
4312OP *
8ac85365 4313ck_fun_locale(OP *o)
bbce6d69 4314{
5dc0d613 4315 o = ck_fun(o);
bbce6d69 4316
5dc0d613 4317 o->op_private = 0;
36477c24 4318#ifdef USE_LOCALE
bbce6d69 4319 if (hints & HINT_LOCALE)
5dc0d613 4320 o->op_private |= OPpLOCALE;
bbce6d69 4321#endif
4322
5dc0d613 4323 return o;
bbce6d69 4324}
4325
4326OP *
8ac85365 4327ck_scmp(OP *o)
bbce6d69 4328{
5dc0d613 4329 o->op_private = 0;
36477c24 4330#ifdef USE_LOCALE
bbce6d69 4331 if (hints & HINT_LOCALE)
5dc0d613 4332 o->op_private |= OPpLOCALE;
bbce6d69 4333#endif
36477c24 4334
5dc0d613 4335 return o;
79072805
LW		 4336}
4337
4338OP *
8ac85365 4339ck_match(OP *o)
79072805 4340{
5dc0d613 4341 o->op_private |= OPpRUNTIME;
11343788 4342 return o;
79072805
LW		 4343}
4344
4345OP *
8ac85365 4346ck_null(OP *o)
79072805 4347{
11343788 4348 return o;
79072805
LW		 4349}
4350
4351OP *
8ac85365 4352ck_repeat(OP *o)
79072805 4353{
11343788
MB		 4354 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4355 o->op_private |= OPpREPEAT_DOLIST;
4356 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4357 }
4358 else
11343788
MB		 4359 scalar(o);
4360 return o;
79072805
LW		 4361}
4362
4363OP *
8ac85365 4364ck_require(OP *o)
8990e307 4365{
11343788
MB		 4366 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4367 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4368
4369 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4370 char *s;
a0d0e21e
LW		 4371 for (s = SvPVX(kid->op_sv); *s; s++) {
4372 if (*s == ':' && s[1] == ':') {
4373 *s = '/';
1aef975c 4374 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4375 --SvCUR(kid->op_sv);
4376 }
8990e307 4377 }
a0d0e21e 4378 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4379 }
4380 }
11343788 4381 return ck_fun(o);
8990e307
LW		 4382}
4383
4384OP *
8ac85365 4385ck_retarget(OP *o)
79072805 4386{
463ee0b2 4387 croak("NOT IMPL LINE %d",__LINE__);
79072805 4388 /* STUB */
11343788 4389 return o;
79072805
LW		 4390}
4391
4392OP *
8ac85365 4393ck_select(OP *o)
79072805 4394{
c07a80fd 4395 OP* kid;
11343788
MB		 4396 if (o->op_flags & OPf_KIDS) {
4397 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4398 if (kid && kid->op_sibling) {
11343788
MB		 4399 o->op_type = OP_SSELECT;
4400 o->op_ppaddr = ppaddr[OP_SSELECT];
4401 o = ck_fun(o);
4402 return fold_constants(o);
79072805
LW		 4403 }
4404 }
11343788
MB		 4405 o = ck_fun(o);
4406 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4407 if (kid && kid->op_type == OP_RV2GV)
4408 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4409 return o;
79072805
LW		 4410}
4411
4412OP *
8ac85365 4413ck_shift(OP *o)
79072805 4414{
11343788 4415 I32 type = o->op_type;
79072805 4416
11343788 4417 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4418 OP *argop;
4419
11343788 4420 op_free(o);
6d4ff0d2 4421#ifdef USE_THREADS
977336f5 4422 if (!CvUNIQUE(compcv)) {
6d4ff0d2
MB		 4423 argop = newOP(OP_PADAV, OPf_REF);
4424 argop->op_targ = 0; /* curpad[0] is @_ */
4425 }
4426 else {
4427 argop = newUNOP(OP_RV2AV, 0,
4428 scalar(newGVOP(OP_GV, 0,
4429 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4430 }
4431#else
4432 argop = newUNOP(OP_RV2AV, 0,
977336f5 4433 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(compcv) ?
6d4ff0d2
MB		 4434 defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
4435#endif /* USE_THREADS */
4436 return newUNOP(type, 0, scalar(argop));
79072805 4437 }
11343788 4438 return scalar(modkids(ck_fun(o), type));
79072805
LW		 4439}
4440
4441OP *
8ac85365 4442ck_sort(OP *o)
79072805 4443{
5dc0d613 4444 o->op_private = 0;
36477c24 4445#ifdef USE_LOCALE
bbce6d69 4446 if (hints & HINT_LOCALE)
5dc0d613 4447 o->op_private |= OPpLOCALE;
bbce6d69 4448#endif
4449
11343788
MB		 4450 if (o->op_flags & OPf_STACKED) {
4451 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 4452 OP *k;
4453 kid = kUNOP->op_first; /* get past rv2gv */
79072805 4454
463ee0b2 4455 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 4456 linklist(kid);
463ee0b2
LW		 4457 if (kid->op_type == OP_SCOPE) {
4458 k = kid->op_next;
4459 kid->op_next = 0;
79072805 4460 }
463ee0b2 4461 else if (kid->op_type == OP_LEAVE) {
11343788 4462 if (o->op_type == OP_SORT) {
748a9306
LW		 4463 null(kid); /* wipe out leave */
4464 kid->op_next = kid;
463ee0b2 4465
748a9306
LW		 4466 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
4467 if (k->op_next == kid)
4468 k->op_next = 0;
4469 }
463ee0b2 4470 }
748a9306
LW		 4471 else
4472 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 4473 k = kLISTOP->op_first;
463ee0b2 4474 }
a0d0e21e
LW		 4475 peep(k);
4476
11343788 4477 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 4478 null(kid); /* wipe out rv2gv */
11343788 4479 if (o->op_type == OP_SORT)
a0d0e21e
LW		 4480 kid->op_next = kid;
4481 else
4482 kid->op_next = k;
11343788 4483 o->op_flags |= OPf_SPECIAL;
79072805
LW		 4484 }
4485 }
bbce6d69 4486
11343788 4487 return o;
79072805
LW		 4488}
4489
4490OP *
8ac85365 4491ck_split(OP *o)
79072805
LW		 4492{
4493 register OP *kid;
aeea060c 4494
11343788
MB		 4495 if (o->op_flags & OPf_STACKED)
4496 return no_fh_allowed(o);
79072805 4497
11343788 4498 kid = cLISTOPo->op_first;
8990e307 4499 if (kid->op_type != OP_NULL)
463ee0b2 4500 croak("panic: ck_split");
8990e307 4501 kid = kid->op_sibling;
11343788
MB		 4502 op_free(cLISTOPo->op_first);
4503 cLISTOPo->op_first = kid;
85e6fe83 4504 if (!kid) {
11343788
MB		 4505 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
4506 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 4507 }
79072805
LW		 4508
4509 if (kid->op_type != OP_MATCH) {
4510 OP *sibl = kid->op_sibling;
463ee0b2 4511 kid->op_sibling = 0;
79072805 4512 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 4513 if (cLISTOPo->op_first == cLISTOPo->op_last)
4514 cLISTOPo->op_last = kid;
4515 cLISTOPo->op_first = kid;
79072805
LW		 4516 kid->op_sibling = sibl;
4517 }
4518
4519 kid->op_type = OP_PUSHRE;
4520 kid->op_ppaddr = ppaddr[OP_PUSHRE];
4521 scalar(kid);
4522
4523 if (!kid->op_sibling)
54b9620d 4524 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 4525
4526 kid = kid->op_sibling;
4527 scalar(kid);
4528
4529 if (!kid->op_sibling)
11343788 4530 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 4531
4532 kid = kid->op_sibling;
4533 scalar(kid);
4534
4535 if (kid->op_sibling)
11343788 4536 return too_many_arguments(o,op_desc[o->op_type]);
79072805 4537
11343788 4538 return o;
79072805
LW		 4539}
4540
4541OP *
8ac85365 4542ck_subr(OP *o)
79072805 4543{
11343788
MB		 4544 dTHR;
4545 OP *prev = ((cUNOPo->op_first->op_sibling)
4546 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
4547 OP *o2 = prev->op_sibling;
4633a7c4
LW		 4548 OP *cvop;
4549 char *proto = 0;
4550 CV *cv = 0;
46fc3d4c 4551 GV *namegv = 0;
4633a7c4
LW		 4552 int optional = 0;
4553 I32 arg = 0;
4554
11343788 4555 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 4556 if (cvop->op_type == OP_RV2CV) {
4557 SVOP* tmpop;
11343788 4558 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 4559 null(cvop); /* disable rv2cv */
4560 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
4561 if (tmpop->op_type == OP_GV) {
8ebc5c01 4562 cv = GvCVu(tmpop->op_sv);
5dc0d613 4563 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 4564 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
4565 proto = SvPV((SV*)cv, na);
4566 }
4633a7c4
LW		 4567 }
4568 }
11343788 4569 o->op_private |= (hints & HINT_STRICT_REFS);
84902520 4570 if (PERLDB_SUB && curstash != debstash)
11343788
MB		 4571 o->op_private |= OPpENTERSUB_DB;
4572 while (o2 != cvop) {
4633a7c4
LW		 4573 if (proto) {
4574 switch (*proto) {
4575 case '\0':
5dc0d613 4576 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 4577 case ';':
4578 optional = 1;
4579 proto++;
4580 continue;
4581 case '$':
4582 proto++;
4583 arg++;
11343788 4584 scalar(o2);
4633a7c4
LW		 4585 break;
4586 case '%':
4587 case '@':
11343788 4588 list(o2);
4633a7c4
LW		 4589 arg++;
4590 break;
4591 case '&':
4592 proto++;
4593 arg++;
11343788 4594 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 4595 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 4596 break;
4597 case '*':
4598 proto++;
4599 arg++;
11343788 4600 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 4601 goto wrapref;
4602 {
11343788 4603 OP* kid = o2;
69dcf70c 4604 OP* sib = kid->op_sibling;
4633a7c4 4605 kid->op_sibling = 0;
69dcf70c
MB		 4606 o2 = newUNOP(OP_RV2GV, 0, kid);
4607 o2->op_sibling = sib;
6fa846a0 4608 prev->op_sibling = o2;
4633a7c4
LW		 4609 }
4610 goto wrapref;
4611 case '\\':
4612 proto++;
4613 arg++;
4614 switch (*proto++) {
4615 case '*':
11343788 4616 if (o2->op_type != OP_RV2GV)
5dc0d613 4617 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 4618 goto wrapref;
4619 case '&':
11343788 4620 if (o2->op_type != OP_RV2CV)
5dc0d613 4621 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 4622 goto wrapref;
4623 case '$':
11343788 4624 if (o2->op_type != OP_RV2SV && o2->op_type != OP_PADSV)
5dc0d613 4625 bad_type(arg, "scalar", gv_ename(namegv), o2);
4633a7c4
LW		 4626 goto wrapref;
4627 case '@':
11343788 4628 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 4629 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 4630 goto wrapref;
4631 case '%':
11343788 4632 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 4633 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 4634 wrapref:
4635 {
11343788 4636 OP* kid = o2;
6fa846a0 4637 OP* sib = kid->op_sibling;
4633a7c4 4638 kid->op_sibling = 0;
6fa846a0
GS		 4639 o2 = newUNOP(OP_REFGEN, 0, kid);
4640 o2->op_sibling = sib;
e858de61 4641 prev->op_sibling = o2;
4633a7c4
LW		 4642 }
4643 break;
4644 default: goto oops;
4645 }
4646 break;
b1cb66bf 4647 case ' ':
4648 proto++;
4649 continue;
4633a7c4
LW		 4650 default:
4651 oops:
4652 croak("Malformed prototype for %s: %s",
46fc3d4c 4653 gv_ename(namegv), SvPV((SV*)cv, na));
4633a7c4
LW		 4654 }
4655 }
4656 else
11343788
MB		 4657 list(o2);
4658 mod(o2, OP_ENTERSUB);
4659 prev = o2;
4660 o2 = o2->op_sibling;
4633a7c4 4661 }
fb73857a 4662 if (proto && !optional &&
4663 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 4664 return too_few_arguments(o, gv_ename(namegv));
11343788 4665 return o;
79072805
LW		 4666}
4667
4668OP *
8ac85365 4669ck_svconst(OP *o)
8990e307 4670{
11343788
MB		 4671 SvREADONLY_on(cSVOPo->op_sv);
4672 return o;
8990e307
LW		 4673}
4674
4675OP *
8ac85365 4676ck_trunc(OP *o)
79072805 4677{
11343788
MB		 4678 if (o->op_flags & OPf_KIDS) {
4679 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4680
a0d0e21e
LW		 4681 if (kid->op_type == OP_NULL)
4682 kid = (SVOP*)kid->op_sibling;
4683 if (kid &&
4684 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 4685 o->op_flags |= OPf_SPECIAL;
79072805 4686 }
11343788 4687 return ck_fun(o);
79072805
LW		 4688}
4689
463ee0b2
LW		 4690/* A peephole optimizer. We visit the ops in the order they're to execute. */
4691
79072805 4692void
8ac85365 4693peep(register OP *o)
79072805 4694{
11343788 4695 dTHR;
79072805 4696 register OP* oldop = 0;
a0d0e21e 4697 if (!o || o->op_seq)
79072805 4698 return;
a0d0e21e 4699 ENTER;
462e5cf6 4700 SAVEOP();
a0d0e21e
LW		 4701 SAVESPTR(curcop);
4702 for (; o; o = o->op_next) {
4703 if (o->op_seq)
4704 break;
c07a80fd 4705 if (!op_seqmax)
4706 op_seqmax++;
a0d0e21e
LW		 4707 op = o;
4708 switch (o->op_type) {
4709 case OP_NEXTSTATE:
4710 case OP_DBSTATE:
4711 curcop = ((COP*)o); /* for warnings */
c07a80fd 4712 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4713 break;
4714
4715 case OP_CONCAT:
4716 case OP_CONST:
4717 case OP_JOIN:
4718 case OP_UC:
4719 case OP_UCFIRST:
4720 case OP_LC:
4721 case OP_LCFIRST:
4722 case OP_QUOTEMETA:
3c4f770c 4723 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 4724 null(o->op_next);
c07a80fd 4725 o->op_seq = op_seqmax++;
a0d0e21e 4726 break;
8990e307 4727 case OP_STUB:
54310121 4728 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
c07a80fd 4729 o->op_seq = op_seqmax++;
54310121 4730 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 4731 }
748a9306 4732 goto nothin;
79072805 4733 case OP_NULL:
748a9306
LW		 4734 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
4735 curcop = ((COP*)op);
4736 goto nothin;
79072805 4737 case OP_SCALAR:
93a17b20 4738 case OP_LINESEQ:
463ee0b2 4739 case OP_SCOPE:
748a9306 4740 nothin:
a0d0e21e
LW		 4741 if (oldop && o->op_next) {
4742 oldop->op_next = o->op_next;
79072805
LW		 4743 continue;
4744 }
c07a80fd 4745 o->op_seq = op_seqmax++;
79072805
LW		 4746 break;
4747
4748 case OP_GV:
a0d0e21e 4749 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 4750 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 4751 null(o->op_next);
4752 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
4753 o->op_next = o->op_next->op_next;
4754 o->op_type = OP_GVSV;
4755 o->op_ppaddr = ppaddr[OP_GVSV];
8990e307
LW		 4756 }
4757 }
a0d0e21e
LW		 4758 else if (o->op_next->op_type == OP_RV2AV) {
4759 OP* pop = o->op_next->op_next;
4760 IV i;
8990e307 4761 if (pop->op_type == OP_CONST &&
e858de61 4762 (op = pop->op_next) &&
8990e307 4763 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 4764 !(pop->op_next->op_private &
68dc0745 4765 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
a0d0e21e
LW		 4766 (i = SvIV(((SVOP*)pop)->op_sv) - compiling.cop_arybase)
4767 <= 255 &&
8990e307
LW		 4768 i >= 0)
4769 {
748a9306 4770 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 4771 null(o->op_next);
8990e307
LW		 4772 null(pop->op_next);
4773 null(pop);
a0d0e21e
LW		 4774 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
4775 o->op_next = pop->op_next->op_next;
4776 o->op_type = OP_AELEMFAST;
4777 o->op_ppaddr = ppaddr[OP_AELEMFAST];
4778 o->op_private = (U8)i;
a6006777 4779 GvAVn(((GVOP*)o)->op_gv);
8990e307 4780 }
79072805 4781 }
c07a80fd 4782 o->op_seq = op_seqmax++;
79072805
LW		 4783 break;
4784
af41f3ca
MB		 4785 case OP_PADAV:
4786 if (o->op_next->op_type == OP_RV2AV
4787 && (o->op_next->op_flags && OPf_REF))
4788 {
4789 null(o->op_next);
4790 o->op_next = o->op_next->op_next;
4791 }
4792 break;
aeea060c 4793
af41f3ca
MB		 4794 case OP_PADHV:
4795 if (o->op_next->op_type == OP_RV2HV
4796 && (o->op_next->op_flags && OPf_REF))
4797 {
4798 null(o->op_next);
4799 o->op_next = o->op_next->op_next;
4800 }
4801 break;
4802
a0d0e21e 4803 case OP_MAPWHILE:
79072805
LW		 4804 case OP_GREPWHILE:
4805 case OP_AND:
4806 case OP_OR:
c07a80fd 4807 o->op_seq = op_seqmax++;
fd4d1407
IZ		 4808 while (cLOGOP->op_other->op_type == OP_NULL)
4809 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 4810 peep(cLOGOP->op_other);
4811 break;
4812
4813 case OP_COND_EXPR:
c07a80fd 4814 o->op_seq = op_seqmax++;
79072805
LW		 4815 peep(cCONDOP->op_true);
4816 peep(cCONDOP->op_false);
4817 break;
4818
4819 case OP_ENTERLOOP:
c07a80fd 4820 o->op_seq = op_seqmax++;
79072805
LW		 4821 peep(cLOOP->op_redoop);
4822 peep(cLOOP->op_nextop);
4823 peep(cLOOP->op_lastop);
4824 break;
4825
4826 case OP_MATCH:
4827 case OP_SUBST:
c07a80fd 4828 o->op_seq = op_seqmax++;
a0d0e21e 4829 peep(cPMOP->op_pmreplstart);
79072805
LW		 4830 break;
4831
a0d0e21e 4832 case OP_EXEC:
c07a80fd 4833 o->op_seq = op_seqmax++;
a0d0e21e
LW		 4834 if (dowarn && o->op_next && o->op_next->op_type == OP_NEXTSTATE) {
4835 if (o->op_next->op_sibling &&
4836 o->op_next->op_sibling->op_type != OP_DIE) {
4837 line_t oldline = curcop->cop_line;
4838
4839 curcop->cop_line = ((COP*)o->op_next)->cop_line;
4840 warn("Statement unlikely to be reached");
4841 warn("(Maybe you meant system() when you said exec()?)\n");
4842 curcop->cop_line = oldline;
4843 }
4844 }
4845 break;
aeea060c 4846
c750a3ec
MB		 4847 case OP_HELEM: {
4848 UNOP *rop;
4849 SV *lexname;
4850 GV **fields;
4851 SV **svp, **indsvp;
4852 I32 ind;
4853 char *key;
4854 STRLEN keylen;
aeea060c 4855
c750a3ec
MB		 4856 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
4857 || ((BINOP*)o)->op_last->op_type != OP_CONST)
4858 break;
4859 rop = (UNOP*)((BINOP*)o)->op_first;
4860 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
4861 break;
4862 lexname = *av_fetch(comppad_name, rop->op_first->op_targ, TRUE);
4863 if (!SvOBJECT(lexname))
4864 break;
5196be3e 4865 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 4866 if (!fields || !GvHV(*fields))
4867 break;
4868 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
4869 key = SvPV(*svp, keylen);
4870 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
4871 if (!indsvp) {
4872 croak("No such field \"%s\" in variable %s of type %s",
4873 key, SvPV(lexname, na), HvNAME(SvSTASH(lexname)));
4874 }
4875 ind = SvIV(*indsvp);
4876 if (ind < 1)
4877 croak("Bad index while coercing array into hash");
4878 rop->op_type = OP_RV2AV;
4879 rop->op_ppaddr = ppaddr[OP_RV2AV];
4880 o->op_type = OP_AELEM;
4881 o->op_ppaddr = ppaddr[OP_AELEM];
4882 SvREFCNT_dec(*svp);
4883 *svp = newSViv(ind);
4884 break;
4885 }
4886
79072805 4887 default:
c07a80fd 4888 o->op_seq = op_seqmax++;
79072805
LW		 4889 break;
4890 }
a0d0e21e 4891 oldop = o;
79072805 4892 }
a0d0e21e 4893 LEAVE;
79072805 4894}
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