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s/warn/print/ on multiply defined groups
[perl5.git] / op.c
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a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
76e3520e 21#ifdef PERL_OBJECT
22c35a8c 22#define CHECKCALL this->*PL_check
76e3520e 23#else
22c35a8c 24#define CHECKCALL *PL_check
76e3520e
GS		 25#endif
26
e50aee73 27/*
5dc0d613 28 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 29 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 30 */
11343788 31#define CHECKOP(type,o) \
3280af22 32 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 33 ? ( op_free((OP*)o), \
22c35a8c 34 croak("%s trapped by operation mask", PL_op_desc[type]), \
28757baa 35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
c53d7c7d
HS		 38#define PAD_MAX 999999999
39
76e3520e
GS		 40static bool scalar_mod_type _((OP *o, I32 type));
41#ifndef PERL_OBJECT
11343788 42static I32 list_assignment _((OP *o));
3bc5dc61 43static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 44static OP *modkids _((OP *o, I32 type));
45static OP *no_fh_allowed _((OP *o));
46static OP *scalarboolean _((OP *o));
47static OP *too_few_arguments _((OP *o, char* name));
48static OP *too_many_arguments _((OP *o, char* name));
49static void null _((OP* o));
bbce6d69 50static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
155fc61f 51 CV* startcv, I32 cx_ix, I32 saweval));
54b9620d 52static OP *newDEFSVOP _((void));
883ffac3 53static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 54#endif
79072805 55
76e3520e 56STATIC char*
8ac85365 57gv_ename(GV *gv)
4633a7c4
LW		 58{
59 SV* tmpsv = sv_newmortal();
46fc3d4c 60 gv_efullname3(tmpsv, gv, Nullch);
3280af22 61 return SvPV(tmpsv,PL_na);
4633a7c4
LW		 62}
63
76e3520e 64STATIC OP *
8ac85365 65no_fh_allowed(OP *o)
79072805 66{
46fc3d4c 67 yyerror(form("Missing comma after first argument to %s function",
22c35a8c 68 PL_op_desc[o->op_type]));
11343788 69 return o;
79072805
LW		 70}
71
76e3520e 72STATIC OP *
8ac85365 73too_few_arguments(OP *o, char *name)
79072805 74{
46fc3d4c 75 yyerror(form("Not enough arguments for %s", name));
11343788 76 return o;
79072805
LW		 77}
78
76e3520e 79STATIC OP *
8ac85365 80too_many_arguments(OP *o, char *name)
79072805 81{
46fc3d4c 82 yyerror(form("Too many arguments for %s", name));
11343788 83 return o;
79072805
LW		 84}
85
76e3520e 86STATIC void
8ac85365 87bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 88{
46fc3d4c 89 yyerror(form("Type of arg %d to %s must be %s (not %s)",
22c35a8c 90 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 91}
92
a0d0e21e 93void
8ac85365 94assertref(OP *o)
a0d0e21e 95{
11343788 96 int type = o->op_type;
136254bc 97 if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
22c35a8c 98 yyerror(form("Can't use subscript on %s", PL_op_desc[type]));
bde90e66 99 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 100 dTHR;
bde90e66
HS		 101 SV *msg = sv_2mortal(
102 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
103 type == OP_ENTERSUB ? '&' : '%'));
3280af22 104 if (PL_in_eval & 2)
bde90e66 105 warn("%_", msg);
3280af22
NIS		 106 else if (PL_in_eval)
107 sv_catsv(GvSV(PL_errgv), msg);
bde90e66
HS		 108 else
109 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
110 }
a0d0e21e
LW		 111 }
112}
113
79072805
LW		 114/* "register" allocation */
115
116PADOFFSET
8ac85365 117pad_allocmy(char *name)
93a17b20 118{
11343788 119 dTHR;
a0d0e21e
LW		 120 PADOFFSET off;
121 SV *sv;
122
834a4ddd
LW		 123 if (!(
124 isALPHA(name[1]) ||
125 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
126 name[1] == '_' && (int)strlen(name) > 2))
127 {
46fc3d4c 128 if (!isPRINT(name[1])) {
129 name[3] = '\0';
130 name[2] = toCTRL(name[1]);
131 name[1] = '^';
132 }
a0d0e21e
LW		 133 croak("Can't use global %s in \"my\"",name);
134 }
599cee73 135 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 136 SV **svp = AvARRAY(PL_comppad_name);
137 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 138 if ((sv = svp[off])
3280af22 139 && sv != &PL_sv_undef
c53d7c7d 140 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 141 && strEQ(name, SvPVX(sv)))
142 {
599cee73 143 warner(WARN_UNSAFE,
9fbbe825 144 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 145 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 146 break;
147 }
148 }
149 }
a0d0e21e
LW		 150 off = pad_alloc(OP_PADSV, SVs_PADMY);
151 sv = NEWSV(1102,0);
93a17b20
LW		 152 sv_upgrade(sv, SVt_PVNV);
153 sv_setpv(sv, name);
3280af22 154 if (PL_in_my_stash) {
c750a3ec
MB		 155 if (*name != '$')
156 croak("Can't declare class for non-scalar %s in \"my\"",name);
157 SvOBJECT_on(sv);
158 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 159 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
160 PL_sv_objcount++;
c750a3ec 161 }
3280af22 162 av_store(PL_comppad_name, off, sv);
c53d7c7d 163 SvNVX(sv) = (double)PAD_MAX;
8990e307 164 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 165 if (!PL_min_intro_pending)
166 PL_min_intro_pending = off;
167 PL_max_intro_pending = off;
93a17b20 168 if (*name == '@')
3280af22 169 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 170 else if (*name == '%')
3280af22
NIS		 171 av_store(PL_comppad, off, (SV*)newHV());
172 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 173 return off;
174}
175
76e3520e 176STATIC PADOFFSET
155fc61f 177pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix, I32 saweval)
93a17b20 178{
11343788 179 dTHR;
748a9306 180 CV *cv;
93a17b20
LW		 181 I32 off;
182 SV *sv;
93a17b20 183 register I32 i;
c09156bb 184 register PERL_CONTEXT *cx;
93a17b20 185
748a9306 186 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 187 AV *curlist = CvPADLIST(cv);
188 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 189 AV *curname;
4fdae800 190
3280af22 191 if (!svp || *svp == &PL_sv_undef)
4633a7c4 192 continue;
748a9306
LW		 193 curname = (AV*)*svp;
194 svp = AvARRAY(curname);
93965878 195 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 196 if ((sv = svp[off]) &&
3280af22 197 sv != &PL_sv_undef &&
748a9306 198 seq <= SvIVX(sv) &&
13826f2c 199 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 200 strEQ(SvPVX(sv), name))
201 {
5f05dabc 202 I32 depth;
203 AV *oldpad;
204 SV *oldsv;
205
206 depth = CvDEPTH(cv);
207 if (!depth) {
9607fc9c 208 if (newoff) {
209 if (SvFAKE(sv))
210 continue;
4fdae800 211 return 0; /* don't clone from inactive stack frame */
9607fc9c 212 }
5f05dabc 213 depth = 1;
214 }
215 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
216 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 217 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 218 SV *namesv = NEWSV(1103,0);
748a9306 219 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 220 sv_upgrade(namesv, SVt_PVNV);
221 sv_setpv(namesv, name);
3280af22
NIS		 222 av_store(PL_comppad_name, newoff, namesv);
223 SvNVX(namesv) = (double)PL_curcop->cop_seq;
c53d7c7d 224 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 225 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 226 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 230 PL_sv_objcount++;
231 }
3280af22 232 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 233 /* "It's closures all the way down." */
3280af22 234 CvCLONE_on(PL_compcv);
54310121 235 if (cv == startcv) {
3280af22 236 if (CvANON(PL_compcv))
54310121 237 oldsv = Nullsv; /* no need to keep ref */
238 }
239 else {
28757baa 240 CV *bcv;
241 for (bcv = startcv;
242 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 243 bcv = CvOUTSIDE(bcv))
244 {
28757baa 245 if (CvANON(bcv))
246 CvCLONE_on(bcv);
247 else {
6b35e009
GS		 248 if (ckWARN(WARN_CLOSURE)
249 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
250 {
599cee73 251 warner(WARN_CLOSURE,
44a8e56a 252 "Variable \"%s\" may be unavailable",
28757baa 253 name);
6b35e009 254 }
28757baa 255 break;
256 }
257 }
258 }
259 }
3280af22 260 else if (!CvUNIQUE(PL_compcv)) {
599cee73
PM		 261 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
262 warner(WARN_CLOSURE,
263 "Variable \"%s\" will not stay shared", name);
5f05dabc 264 }
748a9306 265 }
3280af22 266 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 267 return newoff;
268 }
93a17b20
LW		 269 }
270 }
271
272 /* Nothing in current lexical context--try eval's context, if any.
273 * This is necessary to let the perldb get at lexically scoped variables.
274 * XXX This will also probably interact badly with eval tree caching.
275 */
276
748a9306 277 for (i = cx_ix; i >= 0; i--) {
93a17b20 278 cx = &cxstack[i];
6b35e009 279 switch (CxTYPE(cx)) {
93a17b20 280 default:
748a9306
LW		 281 if (i == 0 && saweval) {
282 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 283 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval);
748a9306 284 }
93a17b20
LW		 285 break;
286 case CXt_EVAL:
44a8e56a 287 switch (cx->blk_eval.old_op_type) {
288 case OP_ENTEREVAL:
6b35e009
GS		 289 if (CxREALEVAL(cx))
290 saweval = i;
44a8e56a 291 break;
292 case OP_REQUIRE:
293 /* require must have its own scope */
294 return 0;
295 }
93a17b20
LW		 296 break;
297 case CXt_SUB:
298 if (!saweval)
299 return 0;
300 cv = cx->blk_sub.cv;
3280af22 301 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 302 saweval = i; /* so we know where we were called from */
93a17b20 303 continue;
93a17b20 304 }
748a9306 305 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 306 return pad_findlex(name, newoff, seq, cv, i-1, saweval);
93a17b20
LW		 307 }
308 }
309
748a9306
LW		 310 return 0;
311}
a0d0e21e 312
748a9306 313PADOFFSET
8ac85365 314pad_findmy(char *name)
748a9306 315{
11343788 316 dTHR;
748a9306 317 I32 off;
54310121 318 I32 pendoff = 0;
748a9306 319 SV *sv;
3280af22
NIS		 320 SV **svp = AvARRAY(PL_comppad_name);
321 U32 seq = PL_cop_seqmax;
6b35e009 322 PERL_CONTEXT *cx;
33b8ce05 323 CV *outside;
748a9306 324
11343788
MB		 325#ifdef USE_THREADS
326 /*
327 * Special case to get lexical (and hence per-thread) @_.
328 * XXX I need to find out how to tell at parse-time whether use
329 * of @_ should refer to a lexical (from a sub) or defgv (global
330 * scope and maybe weird sub-ish things like formats). See
331 * startsub in perly.y. It's possible that @_ could be lexical
332 * (at least from subs) even in non-threaded perl.
333 */
334 if (strEQ(name, "@_"))
335 return 0; /* success. (NOT_IN_PAD indicates failure) */
336#endif /* USE_THREADS */
337
748a9306 338 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 339 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 340 if ((sv = svp[off]) &&
3280af22 341 sv != &PL_sv_undef &&
54310121 342 (!SvIVX(sv) ||
343 (seq <= SvIVX(sv) &&
344 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 345 strEQ(SvPVX(sv), name))
346 {
54310121 347 if (SvIVX(sv))
348 return (PADOFFSET)off;
349 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 350 }
351 }
748a9306 352
33b8ce05
GS		 353 outside = CvOUTSIDE(PL_compcv);
354
355 /* Check if if we're compiling an eval'', and adjust seq to be the
356 * eval's seq number. This depends on eval'' having a non-null
357 * CvOUTSIDE() while it is being compiled. The eval'' itself is
358 * identified by CvUNIQUE being set and CvGV being null. */
359 if (outside && CvUNIQUE(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 360 cx = &cxstack[cxstack_ix];
361 if (CxREALEVAL(cx))
362 seq = cx->blk_oldcop->cop_seq;
363 }
364
748a9306 365 /* See if it's in a nested scope */
33b8ce05 366 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0);
54310121 367 if (off) {
368 /* If there is a pending local definition, this new alias must die */
369 if (pendoff)
3280af22 370 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 371 return off; /* pad_findlex returns 0 for failure...*/
54310121 372 }
11343788 373 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 374}
375
376void
8ac85365 377pad_leavemy(I32 fill)
93a17b20
LW		 378{
379 I32 off;
3280af22 380 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 381 SV *sv;
3280af22
NIS		 382 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
383 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
384 if ((sv = svp[off]) && sv != &PL_sv_undef)
8990e307
LW		 385 warn("%s never introduced", SvPVX(sv));
386 }
387 }
388 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 389 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 390 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 391 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 392 }
393}
394
395PADOFFSET
8ac85365 396pad_alloc(I32 optype, U32 tmptype)
79072805 397{
11343788 398 dTHR;
79072805
LW		 399 SV *sv;
400 I32 retval;
401
3280af22 402 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 403 croak("panic: pad_alloc");
3280af22 404 if (PL_pad_reset_pending)
a0d0e21e 405 pad_reset();
ed6116ce 406 if (tmptype & SVs_PADMY) {
79072805 407 do {
3280af22 408 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 409 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 410 retval = AvFILLp(PL_comppad);
79072805
LW		 411 }
412 else {
3280af22
NIS		 413 SV **names = AvARRAY(PL_comppad_name);
414 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 415 for (;;) {
416 /*
417 * "foreach" index vars temporarily become aliases to non-"my"
418 * values. Thus we must skip, not just pad values that are
419 * marked as current pad values, but also those with names.
420 */
3280af22
NIS		 421 if (++PL_padix <= names_fill &&
422 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 423 continue;
3280af22 424 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 425 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
426 break;
427 }
3280af22 428 retval = PL_padix;
79072805 429 }
8990e307 430 SvFLAGS(sv) |= tmptype;
3280af22 431 PL_curpad = AvARRAY(PL_comppad);
11343788 432#ifdef USE_THREADS
5dc0d613 433 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 434 (unsigned long) thr, (unsigned long) PL_curpad,
22c35a8c 435 (long) retval, PL_op_name[optype]));
11343788 436#else
d9bb4600 437 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 438 (unsigned long) PL_curpad,
22c35a8c 439 (long) retval, PL_op_name[optype]));
11343788 440#endif /* USE_THREADS */
79072805
LW		 441 return (PADOFFSET)retval;
442}
443
444SV *
8990e307 445pad_sv(PADOFFSET po)
79072805 446{
11343788
MB		 447 dTHR;
448#ifdef USE_THREADS
5dc0d613 449 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 450 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 451#else
79072805 452 if (!po)
463ee0b2 453 croak("panic: pad_sv po");
d9bb4600 454 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 455 (unsigned long) PL_curpad, po));
11343788 456#endif /* USE_THREADS */
3280af22 457 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 458}
459
460void
8990e307 461pad_free(PADOFFSET po)
79072805 462{
11343788 463 dTHR;
3280af22 464 if (!PL_curpad)
a0d0e21e 465 return;
3280af22 466 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 467 croak("panic: pad_free curpad");
79072805 468 if (!po)
463ee0b2 469 croak("panic: pad_free po");
11343788 470#ifdef USE_THREADS
5dc0d613 471 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 472 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 473#else
d9bb4600 474 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 475 (unsigned long) PL_curpad, po));
11343788 476#endif /* USE_THREADS */
3280af22
NIS		 477 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
478 SvPADTMP_off(PL_curpad[po]);
479 if ((I32)po < PL_padix)
480 PL_padix = po - 1;
79072805
LW		 481}
482
483void
8990e307 484pad_swipe(PADOFFSET po)
79072805 485{
11343788 486 dTHR;
3280af22 487 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 488 croak("panic: pad_swipe curpad");
79072805 489 if (!po)
463ee0b2 490 croak("panic: pad_swipe po");
11343788 491#ifdef USE_THREADS
5dc0d613 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 493 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 494#else
d9bb4600 495 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 496 (unsigned long) PL_curpad, po));
11343788 497#endif /* USE_THREADS */
3280af22
NIS		 498 SvPADTMP_off(PL_curpad[po]);
499 PL_curpad[po] = NEWSV(1107,0);
500 SvPADTMP_on(PL_curpad[po]);
501 if ((I32)po < PL_padix)
502 PL_padix = po - 1;
79072805
LW		 503}
504
d9bb4600
GS		 505/* XXX pad_reset() is currently disabled because it results in serious bugs.
506 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
507 * on the stack by OPs that use them, there are several ways to get an alias
508 * to a shared TARG. Such an alias will change randomly and unpredictably.
509 * We avoid doing this until we can think of a Better Way.
510 * GSAR 97-10-29 */
79072805 511void
8ac85365 512pad_reset(void)
79072805 513{
d9bb4600 514#ifdef USE_BROKEN_PAD_RESET
11343788 515 dTHR;
79072805
LW		 516 register I32 po;
517
6b88bc9c 518 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 519 croak("panic: pad_reset curpad");
11343788 520#ifdef USE_THREADS
5dc0d613 521 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 522 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 523#else
d9bb4600 524 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 525 (unsigned long) PL_curpad));
11343788 526#endif /* USE_THREADS */
6b88bc9c
GS		 527 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
528 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
529 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
530 SvPADTMP_off(PL_curpad[po]);
748a9306 531 }
6b88bc9c 532 PL_padix = PL_padix_floor;
79072805 533 }
d9bb4600 534#endif
3280af22 535 PL_pad_reset_pending = FALSE;
79072805
LW		 536}
537
a863c7d1 538#ifdef USE_THREADS
54b9620d 539/* find_threadsv is not reentrant */
a863c7d1 540PADOFFSET
54b9620d 541find_threadsv(char *name)
a863c7d1
MB		 542{
543 dTHR;
544 char *p;
545 PADOFFSET key;
554b3eca 546 SV **svp;
54b9620d 547 /* We currently only handle names of a single character */
533c011a 548 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 549 if (!p)
550 return NOT_IN_PAD;
533c011a 551 key = p - PL_threadsv_names;
54b9620d 552 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 553 if (!svp) {
554 SV *sv = NEWSV(0, 0);
54b9620d 555 av_store(thr->threadsv, key, sv);
940cb80d 556 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 557 /*
558 * Some magic variables used to be automagically initialised
559 * in gv_fetchpv. Those which are now per-thread magicals get
560 * initialised here instead.
561 */
562 switch (*name) {
54b9620d
MB		 563 case '_':
564 break;
554b3eca
MB		 565 case ';':
566 sv_setpv(sv, "\034");
54b9620d 567 sv_magic(sv, 0, 0, name, 1);
554b3eca 568 break;
c277df42
IZ		 569 case '&':
570 case '`':
571 case '\'':
533c011a 572 PL_sawampersand = TRUE;
a3f914c5
GS		 573 /* FALL THROUGH */
574 case '1':
575 case '2':
576 case '3':
577 case '4':
578 case '5':
579 case '6':
580 case '7':
581 case '8':
582 case '9':
c277df42 583 SvREADONLY_on(sv);
d8b5173a 584 /* FALL THROUGH */
067391ea
GS		 585
586 /* XXX %! tied to Errno.pm needs to be added here.
587 * See gv_fetchpv(). */
588 /* case '!': */
589
54b9620d
MB		 590 default:
591 sv_magic(sv, 0, 0, name, 1);
554b3eca 592 }
8b73bbec 593 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 594 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 595 sv, (*name < 32) ? "^" : "",
596 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 597 }
598 return key;
599}
600#endif /* USE_THREADS */
601
79072805
LW		 602/* Destructor */
603
604void
8ac85365 605op_free(OP *o)
79072805 606{
85e6fe83 607 register OP *kid, *nextkid;
79072805 608
5dc0d613 609 if (!o || o->op_seq == (U16)-1)
79072805
LW		 610 return;
611
11343788
MB		 612 if (o->op_flags & OPf_KIDS) {
613 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 614 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 615 op_free(kid);
85e6fe83 616 }
79072805
LW		 617 }
618
11343788 619 switch (o->op_type) {
8990e307 620 case OP_NULL:
11343788 621 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 622 break;
a0d0e21e 623 case OP_ENTEREVAL:
11343788 624 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 625 break;
554b3eca 626#ifdef USE_THREADS
8dd3ba40
SM		 627 case OP_ENTERITER:
628 if (!(o->op_flags & OPf_SPECIAL))
629 break;
630 /* FALL THROUGH */
2faa37cc 631 case OP_THREADSV:
54b9620d 632 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 633 break;
634#endif /* USE_THREADS */
a6006777 635 default:
ac4c12e7 636 if (!(o->op_flags & OPf_REF)
22c35a8c 637 || (PL_check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 638 break;
639 /* FALL THROUGH */
463ee0b2 640 case OP_GVSV:
79072805 641 case OP_GV:
a6006777 642 case OP_AELEMFAST:
11343788 643 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 644 break;
645 case OP_NEXTSTATE:
646 case OP_DBSTATE:
5196be3e 647 Safefree(cCOPo->cop_label);
11343788 648 SvREFCNT_dec(cCOPo->cop_filegv);
599cee73
PM		 649 if (cCOPo->cop_warnings != WARN_NONE && cCOPo->cop_warnings != WARN_ALL)
650 SvREFCNT_dec(cCOPo->cop_warnings);
79072805
LW		 651 break;
652 case OP_CONST:
11343788 653 SvREFCNT_dec(cSVOPo->op_sv);
79072805 654 break;
748a9306
LW		 655 case OP_GOTO:
656 case OP_NEXT:
657 case OP_LAST:
658 case OP_REDO:
11343788 659 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 660 break;
661 /* FALL THROUGH */
a0d0e21e 662 case OP_TRANS:
a0ed51b3
LW		 663 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
664 SvREFCNT_dec(cSVOPo->op_sv);
665 else
666 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 667 break;
668 case OP_SUBST:
11343788 669 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 670 /* FALL THROUGH */
748a9306 671 case OP_PUSHRE:
a0d0e21e 672 case OP_MATCH:
8782bef2 673 case OP_QR:
c277df42 674 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 675 break;
79072805
LW		 676 }
677
11343788
MB		 678 if (o->op_targ > 0)
679 pad_free(o->op_targ);
8990e307 680
11343788 681 Safefree(o);
79072805
LW		 682}
683
76e3520e 684STATIC void
8ac85365 685null(OP *o)
8990e307 686{
54b9620d 687 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 688 pad_free(o->op_targ);
689 o->op_targ = o->op_type;
690 o->op_type = OP_NULL;
22c35a8c 691 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 692}
693
79072805
LW		 694/* Contextualizers */
695
463ee0b2 696#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 697
698OP *
8ac85365 699linklist(OP *o)
79072805
LW		 700{
701 register OP *kid;
702
11343788
MB		 703 if (o->op_next)
704 return o->op_next;
79072805
LW		 705
706 /* establish postfix order */
11343788
MB		 707 if (cUNOPo->op_first) {
708 o->op_next = LINKLIST(cUNOPo->op_first);
709 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 710 if (kid->op_sibling)
711 kid->op_next = LINKLIST(kid->op_sibling);
712 else
11343788 713 kid->op_next = o;
79072805
LW		 714 }
715 }
716 else
11343788 717 o->op_next = o;
79072805 718
11343788 719 return o->op_next;
79072805
LW		 720}
721
722OP *
8ac85365 723scalarkids(OP *o)
79072805
LW		 724{
725 OP *kid;
11343788
MB		 726 if (o && o->op_flags & OPf_KIDS) {
727 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 728 scalar(kid);
729 }
11343788 730 return o;
79072805
LW		 731}
732
76e3520e 733STATIC OP *
8ac85365 734scalarboolean(OP *o)
8990e307 735{
d008e5eb 736 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 737 dTHR;
d008e5eb
GS		 738 if (ckWARN(WARN_SYNTAX)) {
739 line_t oldline = PL_curcop->cop_line;
a0d0e21e 740
d008e5eb
GS		 741 if (PL_copline != NOLINE)
742 PL_curcop->cop_line = PL_copline;
743 warner(WARN_SYNTAX, "Found = in conditional, should be ==");
744 PL_curcop->cop_line = oldline;
745 }
a0d0e21e 746 }
11343788 747 return scalar(o);
8990e307
LW		 748}
749
750OP *
8ac85365 751scalar(OP *o)
79072805
LW		 752{
753 OP *kid;
754
a0d0e21e 755 /* assumes no premature commitment */
3280af22 756 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 757 || o->op_type == OP_RETURN)
11343788 758 return o;
79072805 759
5dc0d613 760 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 761
11343788 762 switch (o->op_type) {
79072805 763 case OP_REPEAT:
11343788
MB		 764 if (o->op_private & OPpREPEAT_DOLIST)
765 null(((LISTOP*)cBINOPo->op_first)->op_first);
766 scalar(cBINOPo->op_first);
8990e307 767 break;
79072805
LW		 768 case OP_OR:
769 case OP_AND:
770 case OP_COND_EXPR:
11343788 771 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 772 scalar(kid);
79072805 773 break;
a0d0e21e 774 case OP_SPLIT:
11343788 775 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 776 if (!kPMOP->op_pmreplroot)
777 deprecate("implicit split to @_");
778 }
779 /* FALL THROUGH */
79072805 780 case OP_MATCH:
8782bef2 781 case OP_QR:
79072805
LW		 782 case OP_SUBST:
783 case OP_NULL:
8990e307 784 default:
11343788
MB		 785 if (o->op_flags & OPf_KIDS) {
786 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 787 scalar(kid);
788 }
79072805
LW		 789 break;
790 case OP_LEAVE:
791 case OP_LEAVETRY:
5dc0d613 792 kid = cLISTOPo->op_first;
54310121 793 scalar(kid);
794 while (kid = kid->op_sibling) {
795 if (kid->op_sibling)
796 scalarvoid(kid);
797 else
798 scalar(kid);
799 }
3280af22 800 WITH_THR(PL_curcop = &PL_compiling);
54310121 801 break;
748a9306 802 case OP_SCOPE:
79072805 803 case OP_LINESEQ:
8990e307 804 case OP_LIST:
11343788 805 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 806 if (kid->op_sibling)
807 scalarvoid(kid);
808 else
809 scalar(kid);
810 }
3280af22 811 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 812 break;
813 }
11343788 814 return o;
79072805
LW		 815}
816
817OP *
8ac85365 818scalarvoid(OP *o)
79072805
LW		 819{
820 OP *kid;
8990e307
LW		 821 char* useless = 0;
822 SV* sv;
79072805 823
54310121 824 /* assumes no premature commitment */
3280af22 825 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || PL_error_count
5dc0d613 826 || o->op_type == OP_RETURN)
11343788 827 return o;
79072805 828
5dc0d613 829 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 830
11343788 831 switch (o->op_type) {
79072805 832 default:
22c35a8c 833 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 834 break;
36477c24 835 /* FALL THROUGH */
836 case OP_REPEAT:
11343788 837 if (o->op_flags & OPf_STACKED)
8990e307 838 break;
5d82c453
GA		 839 goto func_ops;
840 case OP_SUBSTR:
841 if (o->op_private == 4)
842 break;
8990e307
LW		 843 /* FALL THROUGH */
844 case OP_GVSV:
845 case OP_WANTARRAY:
846 case OP_GV:
847 case OP_PADSV:
848 case OP_PADAV:
849 case OP_PADHV:
850 case OP_PADANY:
851 case OP_AV2ARYLEN:
8990e307 852 case OP_REF:
a0d0e21e
LW		 853 case OP_REFGEN:
854 case OP_SREFGEN:
8990e307
LW		 855 case OP_DEFINED:
856 case OP_HEX:
857 case OP_OCT:
858 case OP_LENGTH:
8990e307
LW		 859 case OP_VEC:
860 case OP_INDEX:
861 case OP_RINDEX:
862 case OP_SPRINTF:
863 case OP_AELEM:
864 case OP_AELEMFAST:
865 case OP_ASLICE:
8990e307
LW		 866 case OP_HELEM:
867 case OP_HSLICE:
868 case OP_UNPACK:
869 case OP_PACK:
8990e307
LW		 870 case OP_JOIN:
871 case OP_LSLICE:
872 case OP_ANONLIST:
873 case OP_ANONHASH:
874 case OP_SORT:
875 case OP_REVERSE:
876 case OP_RANGE:
877 case OP_FLIP:
878 case OP_FLOP:
879 case OP_CALLER:
880 case OP_FILENO:
881 case OP_EOF:
882 case OP_TELL:
883 case OP_GETSOCKNAME:
884 case OP_GETPEERNAME:
885 case OP_READLINK:
886 case OP_TELLDIR:
887 case OP_GETPPID:
888 case OP_GETPGRP:
889 case OP_GETPRIORITY:
890 case OP_TIME:
891 case OP_TMS:
892 case OP_LOCALTIME:
893 case OP_GMTIME:
894 case OP_GHBYNAME:
895 case OP_GHBYADDR:
896 case OP_GHOSTENT:
897 case OP_GNBYNAME:
898 case OP_GNBYADDR:
899 case OP_GNETENT:
900 case OP_GPBYNAME:
901 case OP_GPBYNUMBER:
902 case OP_GPROTOENT:
903 case OP_GSBYNAME:
904 case OP_GSBYPORT:
905 case OP_GSERVENT:
906 case OP_GPWNAM:
907 case OP_GPWUID:
908 case OP_GGRNAM:
909 case OP_GGRGID:
910 case OP_GETLOGIN:
5d82c453 911 func_ops:
11343788 912 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 913 useless = PL_op_desc[o->op_type];
8990e307
LW		 914 break;
915
916 case OP_RV2GV:
917 case OP_RV2SV:
918 case OP_RV2AV:
919 case OP_RV2HV:
11343788
MB		 920 if (!(o->op_private & OPpLVAL_INTRO) &&
921 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 922 useless = "a variable";
923 break;
79072805 924
93a17b20 925 case OP_NEXTSTATE:
8990e307 926 case OP_DBSTATE:
3280af22 927 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 928 break;
929
79072805 930 case OP_CONST:
11343788 931 sv = cSVOPo->op_sv;
d008e5eb
GS		 932 {
933 dTHR;
934 if (ckWARN(WARN_VOID)) {
935 useless = "a constant";
936 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
937 useless = 0;
938 else if (SvPOK(sv)) {
939 if (strnEQ(SvPVX(sv), "di", 2) ||
940 strnEQ(SvPVX(sv), "ds", 2) ||
941 strnEQ(SvPVX(sv), "ig", 2))
942 useless = 0;
943 }
8990e307
LW		 944 }
945 }
11343788 946 null(o); /* don't execute a constant */
8990e307 947 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 948 break;
949
950 case OP_POSTINC:
11343788 951 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 952 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 953 break;
954
955 case OP_POSTDEC:
11343788 956 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 957 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 958 break;
959
79072805
LW		 960 case OP_OR:
961 case OP_AND:
962 case OP_COND_EXPR:
11343788 963 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 964 scalarvoid(kid);
965 break;
5aabfad6 966
a0d0e21e 967 case OP_NULL:
11343788 968 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 969 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
11343788 970 if (o->op_flags & OPf_STACKED)
a0d0e21e 971 break;
5aabfad6 972 /* FALL THROUGH */
79072805
LW		 973 case OP_ENTERTRY:
974 case OP_ENTER:
975 case OP_SCALAR:
11343788 976 if (!(o->op_flags & OPf_KIDS))
79072805 977 break;
54310121 978 /* FALL THROUGH */
463ee0b2 979 case OP_SCOPE:
79072805
LW		 980 case OP_LEAVE:
981 case OP_LEAVETRY:
a0d0e21e 982 case OP_LEAVELOOP:
79072805 983 case OP_LINESEQ:
79072805 984 case OP_LIST:
11343788 985 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 986 scalarvoid(kid);
987 break;
c90c0ff4 988 case OP_ENTEREVAL:
5196be3e 989 scalarkids(o);
c90c0ff4 990 break;
5aabfad6 991 case OP_REQUIRE:
c90c0ff4 992 /* all requires must return a boolean value */
5196be3e
MB		 993 o->op_flags &= ~OPf_WANT;
994 return scalar(o);
a0d0e21e 995 case OP_SPLIT:
11343788 996 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 997 if (!kPMOP->op_pmreplroot)
998 deprecate("implicit split to @_");
999 }
1000 break;
79072805 1001 }
d008e5eb
GS		 1002 if (useless) {
1003 dTHR;
1004 if (ckWARN(WARN_VOID))
1005 warner(WARN_VOID, "Useless use of %s in void context", useless);
1006 }
11343788 1007 return o;
79072805
LW		 1008}
1009
1010OP *
8ac85365 1011listkids(OP *o)
79072805
LW		 1012{
1013 OP *kid;
11343788
MB		 1014 if (o && o->op_flags & OPf_KIDS) {
1015 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1016 list(kid);
1017 }
11343788 1018 return o;
79072805
LW		 1019}
1020
1021OP *
8ac85365 1022list(OP *o)
79072805
LW		 1023{
1024 OP *kid;
1025
a0d0e21e 1026 /* assumes no premature commitment */
3280af22 1027 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1028 || o->op_type == OP_RETURN)
11343788 1029 return o;
79072805 1030
5dc0d613 1031 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1032
11343788 1033 switch (o->op_type) {
79072805
LW		 1034 case OP_FLOP:
1035 case OP_REPEAT:
11343788 1036 list(cBINOPo->op_first);
79072805
LW		 1037 break;
1038 case OP_OR:
1039 case OP_AND:
1040 case OP_COND_EXPR:
11343788 1041 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1042 list(kid);
1043 break;
1044 default:
1045 case OP_MATCH:
8782bef2 1046 case OP_QR:
79072805
LW		 1047 case OP_SUBST:
1048 case OP_NULL:
11343788 1049 if (!(o->op_flags & OPf_KIDS))
79072805 1050 break;
11343788
MB		 1051 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1052 list(cBINOPo->op_first);
1053 return gen_constant_list(o);
79072805
LW		 1054 }
1055 case OP_LIST:
11343788 1056 listkids(o);
79072805
LW		 1057 break;
1058 case OP_LEAVE:
1059 case OP_LEAVETRY:
5dc0d613 1060 kid = cLISTOPo->op_first;
54310121 1061 list(kid);
1062 while (kid = kid->op_sibling) {
1063 if (kid->op_sibling)
1064 scalarvoid(kid);
1065 else
1066 list(kid);
1067 }
3280af22 1068 WITH_THR(PL_curcop = &PL_compiling);
54310121 1069 break;
748a9306 1070 case OP_SCOPE:
79072805 1071 case OP_LINESEQ:
11343788 1072 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1073 if (kid->op_sibling)
1074 scalarvoid(kid);
1075 else
1076 list(kid);
1077 }
3280af22 1078 WITH_THR(PL_curcop = &PL_compiling);
79072805 1079 break;
c90c0ff4 1080 case OP_REQUIRE:
1081 /* all requires must return a boolean value */
5196be3e
MB		 1082 o->op_flags &= ~OPf_WANT;
1083 return scalar(o);
79072805 1084 }
11343788 1085 return o;
79072805
LW		 1086}
1087
1088OP *
8ac85365 1089scalarseq(OP *o)
79072805
LW		 1090{
1091 OP *kid;
1092
11343788
MB		 1093 if (o) {
1094 if (o->op_type == OP_LINESEQ ||
1095 o->op_type == OP_SCOPE ||
1096 o->op_type == OP_LEAVE ||
1097 o->op_type == OP_LEAVETRY)
463ee0b2 1098 {
0f15f207 1099 dTHR;
11343788 1100 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1101 if (kid->op_sibling) {
463ee0b2 1102 scalarvoid(kid);
ed6116ce 1103 }
463ee0b2 1104 }
3280af22 1105 PL_curcop = &PL_compiling;
79072805 1106 }
11343788 1107 o->op_flags &= ~OPf_PARENS;
3280af22 1108 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1109 o->op_flags |= OPf_PARENS;
79072805 1110 }
8990e307 1111 else
11343788
MB		 1112 o = newOP(OP_STUB, 0);
1113 return o;
79072805
LW		 1114}
1115
76e3520e 1116STATIC OP *
8ac85365 1117modkids(OP *o, I32 type)
79072805
LW		 1118{
1119 OP *kid;
11343788
MB		 1120 if (o && o->op_flags & OPf_KIDS) {
1121 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1122 mod(kid, type);
79072805 1123 }
11343788 1124 return o;
79072805
LW		 1125}
1126
79072805 1127OP *
8ac85365 1128mod(OP *o, I32 type)
79072805 1129{
11343788 1130 dTHR;
79072805
LW		 1131 OP *kid;
1132 SV *sv;
1133
3280af22 1134 if (!o || PL_error_count)
11343788 1135 return o;
79072805 1136
11343788 1137 switch (o->op_type) {
68dc0745 1138 case OP_UNDEF:
3280af22 1139 PL_modcount++;
5dc0d613 1140 return o;
a0d0e21e 1141 case OP_CONST:
11343788 1142 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1143 goto nomod;
3280af22
NIS		 1144 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1145 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1146 PL_eval_start = 0;
a0d0e21e
LW		 1147 }
1148 else if (!type) {
3280af22
NIS		 1149 SAVEI32(PL_compiling.cop_arybase);
1150 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1151 }
1152 else if (type == OP_REFGEN)
1153 goto nomod;
1154 else
1155 croak("That use of $[ is unsupported");
1156 break;
5f05dabc 1157 case OP_STUB:
5196be3e 1158 if (o->op_flags & OPf_PARENS)
5f05dabc 1159 break;
1160 goto nomod;
a0d0e21e
LW		 1161 case OP_ENTERSUB:
1162 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1163 !(o->op_flags & OPf_STACKED)) {
1164 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1165 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1166 assert(cUNOPo->op_first->op_type == OP_NULL);
1167 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1168 break;
1169 }
1170 /* FALL THROUGH */
1171 default:
a0d0e21e
LW		 1172 nomod:
1173 /* grep, foreach, subcalls, refgen */
1174 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1175 break;
46fc3d4c 1176 yyerror(form("Can't modify %s in %s",
638bc118 1177 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
22c35a8c
GS		 1178 ? "do block" : PL_op_desc[o->op_type]),
1179 type ? PL_op_desc[type] : "local"));
11343788 1180 return o;
79072805 1181
a0d0e21e
LW		 1182 case OP_PREINC:
1183 case OP_PREDEC:
1184 case OP_POW:
1185 case OP_MULTIPLY:
1186 case OP_DIVIDE:
1187 case OP_MODULO:
1188 case OP_REPEAT:
1189 case OP_ADD:
1190 case OP_SUBTRACT:
1191 case OP_CONCAT:
1192 case OP_LEFT_SHIFT:
1193 case OP_RIGHT_SHIFT:
1194 case OP_BIT_AND:
1195 case OP_BIT_XOR:
1196 case OP_BIT_OR:
1197 case OP_I_MULTIPLY:
1198 case OP_I_DIVIDE:
1199 case OP_I_MODULO:
1200 case OP_I_ADD:
1201 case OP_I_SUBTRACT:
11343788 1202 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1203 goto nomod;
3280af22 1204 PL_modcount++;
a0d0e21e
LW		 1205 break;
1206
79072805 1207 case OP_COND_EXPR:
11343788 1208 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1209 mod(kid, type);
79072805
LW		 1210 break;
1211
1212 case OP_RV2AV:
1213 case OP_RV2HV:
93af7a87 1214 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1215 croak("Can't localize through a reference");
11343788 1216 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1217 PL_modcount = 10000;
11343788 1218 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1219 }
1220 /* FALL THROUGH */
79072805 1221 case OP_RV2GV:
5dc0d613 1222 if (scalar_mod_type(o, type))
3fe9a6f1 1223 goto nomod;
11343788 1224 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1225 /* FALL THROUGH */
1226 case OP_AASSIGN:
1227 case OP_ASLICE:
1228 case OP_HSLICE:
93a17b20
LW		 1229 case OP_NEXTSTATE:
1230 case OP_DBSTATE:
a0d0e21e
LW		 1231 case OP_REFGEN:
1232 case OP_CHOMP:
3280af22 1233 PL_modcount = 10000;
79072805 1234 break;
463ee0b2 1235 case OP_RV2SV:
11343788 1236 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1237 croak("Can't localize through a reference");
aeea060c 1238 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1239 /* FALL THROUGH */
79072805 1240 case OP_GV:
463ee0b2 1241 case OP_AV2ARYLEN:
3280af22 1242 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1243 case OP_SASSIGN:
8990e307 1244 case OP_AELEMFAST:
3280af22 1245 PL_modcount++;
8990e307
LW		 1246 break;
1247
748a9306
LW		 1248 case OP_PADAV:
1249 case OP_PADHV:
3280af22 1250 PL_modcount = 10000;
5196be3e
MB		 1251 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1252 return o; /* Treat \(@foo) like ordinary list. */
1253 if (scalar_mod_type(o, type))
3fe9a6f1 1254 goto nomod;
748a9306
LW		 1255 /* FALL THROUGH */
1256 case OP_PADSV:
3280af22 1257 PL_modcount++;
748a9306
LW		 1258 if (!type)
1259 croak("Can't localize lexical variable %s",
3280af22 1260 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), PL_na));
463ee0b2
LW		 1261 break;
1262
554b3eca 1263#ifdef USE_THREADS
2faa37cc 1264 case OP_THREADSV:
533c011a 1265 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1266 break;
1267#endif /* USE_THREADS */
1268
748a9306
LW		 1269 case OP_PUSHMARK:
1270 break;
a0d0e21e 1271
69969c6f
SB		 1272 case OP_KEYS:
1273 if (type != OP_SASSIGN)
1274 goto nomod;
5d82c453
GA		 1275 goto lvalue_func;
1276 case OP_SUBSTR:
1277 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1278 goto nomod;
5f05dabc 1279 /* FALL THROUGH */
a0d0e21e 1280 case OP_POS:
463ee0b2 1281 case OP_VEC:
5d82c453 1282 lvalue_func:
11343788
MB		 1283 pad_free(o->op_targ);
1284 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1285 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1286 if (o->op_flags & OPf_KIDS)
1287 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1288 break;
a0d0e21e 1289
463ee0b2
LW		 1290 case OP_AELEM:
1291 case OP_HELEM:
11343788 1292 ref(cBINOPo->op_first, o->op_type);
68dc0745 1293 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1294 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1295 o->op_private |= OPpLVAL_DEFER;
3280af22 1296 PL_modcount++;
463ee0b2
LW		 1297 break;
1298
1299 case OP_SCOPE:
1300 case OP_LEAVE:
1301 case OP_ENTER:
11343788
MB		 1302 if (o->op_flags & OPf_KIDS)
1303 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1304 break;
1305
1306 case OP_NULL:
638bc118
GS		 1307 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1308 goto nomod;
1309 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1310 break;
11343788
MB		 1311 if (o->op_targ != OP_LIST) {
1312 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1313 break;
1314 }
1315 /* FALL THROUGH */
463ee0b2 1316 case OP_LIST:
11343788 1317 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1318 mod(kid, type);
1319 break;
1320 }
11343788 1321 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1322
1323 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1324 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1325 else if (!type) {
11343788
MB		 1326 o->op_private |= OPpLVAL_INTRO;
1327 o->op_flags &= ~OPf_SPECIAL;
3280af22 1328 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1329 }
a0d0e21e 1330 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1331 o->op_flags |= OPf_REF;
1332 return o;
463ee0b2
LW		 1333}
1334
3fe9a6f1 1335static bool
8ac85365 1336scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1337{
1338 switch (type) {
1339 case OP_SASSIGN:
5196be3e 1340 if (o->op_type == OP_RV2GV)
3fe9a6f1 1341 return FALSE;
1342 /* FALL THROUGH */
1343 case OP_PREINC:
1344 case OP_PREDEC:
1345 case OP_POSTINC:
1346 case OP_POSTDEC:
1347 case OP_I_PREINC:
1348 case OP_I_PREDEC:
1349 case OP_I_POSTINC:
1350 case OP_I_POSTDEC:
1351 case OP_POW:
1352 case OP_MULTIPLY:
1353 case OP_DIVIDE:
1354 case OP_MODULO:
1355 case OP_REPEAT:
1356 case OP_ADD:
1357 case OP_SUBTRACT:
1358 case OP_I_MULTIPLY:
1359 case OP_I_DIVIDE:
1360 case OP_I_MODULO:
1361 case OP_I_ADD:
1362 case OP_I_SUBTRACT:
1363 case OP_LEFT_SHIFT:
1364 case OP_RIGHT_SHIFT:
1365 case OP_BIT_AND:
1366 case OP_BIT_XOR:
1367 case OP_BIT_OR:
1368 case OP_CONCAT:
1369 case OP_SUBST:
1370 case OP_TRANS:
49e9fbe6
GS		 1371 case OP_READ:
1372 case OP_SYSREAD:
1373 case OP_RECV:
3fe9a6f1 1374 case OP_ANDASSIGN: /* may work later */
1375 case OP_ORASSIGN: /* may work later */
1376 return TRUE;
1377 default:
1378 return FALSE;
1379 }
1380}
1381
463ee0b2 1382OP *
8ac85365 1383refkids(OP *o, I32 type)
463ee0b2
LW		 1384{
1385 OP *kid;
11343788
MB		 1386 if (o && o->op_flags & OPf_KIDS) {
1387 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1388 ref(kid, type);
1389 }
11343788 1390 return o;
463ee0b2
LW		 1391}
1392
1393OP *
8ac85365 1394ref(OP *o, I32 type)
463ee0b2
LW		 1395{
1396 OP *kid;
463ee0b2 1397
3280af22 1398 if (!o || PL_error_count)
11343788 1399 return o;
463ee0b2 1400
11343788 1401 switch (o->op_type) {
a0d0e21e 1402 case OP_ENTERSUB:
e55aaa0e 1403 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1404 !(o->op_flags & OPf_STACKED)) {
1405 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1406 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1407 assert(cUNOPo->op_first->op_type == OP_NULL);
1408 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1409 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1410 }
1411 break;
aeea060c 1412
463ee0b2 1413 case OP_COND_EXPR:
11343788 1414 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1415 ref(kid, type);
1416 break;
8990e307 1417 case OP_RV2SV:
11343788 1418 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1419 /* FALL THROUGH */
1420 case OP_PADSV:
5f05dabc 1421 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1422 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1423 : type == OP_RV2HV ? OPpDEREF_HV
1424 : OPpDEREF_SV);
11343788 1425 o->op_flags |= OPf_MOD;
a0d0e21e 1426 }
8990e307
LW		 1427 break;
1428
2faa37cc 1429 case OP_THREADSV:
a863c7d1
MB		 1430 o->op_flags |= OPf_MOD; /* XXX ??? */
1431 break;
1432
463ee0b2
LW		 1433 case OP_RV2AV:
1434 case OP_RV2HV:
aeea060c 1435 o->op_flags |= OPf_REF;
8990e307 1436 /* FALL THROUGH */
463ee0b2 1437 case OP_RV2GV:
11343788 1438 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1439 break;
8990e307 1440
463ee0b2
LW		 1441 case OP_PADAV:
1442 case OP_PADHV:
aeea060c 1443 o->op_flags |= OPf_REF;
79072805 1444 break;
aeea060c 1445
8990e307 1446 case OP_SCALAR:
79072805 1447 case OP_NULL:
11343788 1448 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1449 break;
11343788 1450 ref(cBINOPo->op_first, type);
79072805
LW		 1451 break;
1452 case OP_AELEM:
1453 case OP_HELEM:
11343788 1454 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1455 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1456 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1457 : type == OP_RV2HV ? OPpDEREF_HV
1458 : OPpDEREF_SV);
11343788 1459 o->op_flags |= OPf_MOD;
8990e307 1460 }
79072805
LW		 1461 break;
1462
463ee0b2 1463 case OP_SCOPE:
79072805
LW		 1464 case OP_LEAVE:
1465 case OP_ENTER:
8990e307 1466 case OP_LIST:
11343788 1467 if (!(o->op_flags & OPf_KIDS))
79072805 1468 break;
11343788 1469 ref(cLISTOPo->op_last, type);
79072805 1470 break;
a0d0e21e
LW		 1471 default:
1472 break;
79072805 1473 }
11343788 1474 return scalar(o);
8990e307 1475
79072805
LW		 1476}
1477
1478OP *
8ac85365 1479my(OP *o)
93a17b20
LW		 1480{
1481 OP *kid;
93a17b20
LW		 1482 I32 type;
1483
3280af22 1484 if (!o || PL_error_count)
11343788 1485 return o;
93a17b20 1486
11343788 1487 type = o->op_type;
93a17b20 1488 if (type == OP_LIST) {
11343788 1489 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1490 my(kid);
dab48698 1491 } else if (type == OP_UNDEF) {
7766148a 1492 return o;
dab48698 1493 } else if (type != OP_PADSV &&
93a17b20
LW		 1494 type != OP_PADAV &&
1495 type != OP_PADHV &&
1496 type != OP_PUSHMARK)
1497 {
22c35a8c 1498 yyerror(form("Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1499 return o;
93a17b20 1500 }
11343788
MB		 1501 o->op_flags |= OPf_MOD;
1502 o->op_private |= OPpLVAL_INTRO;
1503 return o;
93a17b20
LW		 1504}
1505
1506OP *
8ac85365 1507sawparens(OP *o)
79072805
LW		 1508{
1509 if (o)
1510 o->op_flags |= OPf_PARENS;
1511 return o;
1512}
1513
1514OP *
8ac85365 1515bind_match(I32 type, OP *left, OP *right)
79072805 1516{
d008e5eb 1517 dTHR;
11343788 1518 OP *o;
79072805 1519
599cee73
PM		 1520 if (ckWARN(WARN_UNSAFE) &&
1521 (left->op_type == OP_RV2AV ||
1522 left->op_type == OP_RV2HV ||
1523 left->op_type == OP_PADAV ||
1524 left->op_type == OP_PADHV)) {
22c35a8c 1525 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1526 right->op_type == OP_TRANS)
1527 ? right->op_type : OP_MATCH];
1528 char *sample = ((left->op_type == OP_RV2AV ||
1529 left->op_type == OP_PADAV)
1530 ? "@array" : "%hash");
1531 warner(WARN_UNSAFE,
1532 "Applying %s to %s will act on scalar(%s)",
1533 desc, sample, sample);
2ae324a7 1534 }
1535
79072805
LW		 1536 if (right->op_type == OP_MATCH ||
1537 right->op_type == OP_SUBST ||
1538 right->op_type == OP_TRANS) {
1539 right->op_flags |= OPf_STACKED;
1540 if (right->op_type != OP_MATCH)
463ee0b2 1541 left = mod(left, right->op_type);
79072805 1542 if (right->op_type == OP_TRANS)
11343788 1543 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1544 else
11343788 1545 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1546 if (type == OP_NOT)
11343788
MB		 1547 return newUNOP(OP_NOT, 0, scalar(o));
1548 return o;
79072805
LW		 1549 }
1550 else
1551 return bind_match(type, left,
1552 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1553}
1554
1555OP *
8ac85365 1556invert(OP *o)
79072805 1557{
11343788
MB		 1558 if (!o)
1559 return o;
79072805 1560 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1561 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1562}
1563
1564OP *
8ac85365 1565scope(OP *o)
79072805
LW		 1566{
1567 if (o) {
3280af22 1568 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1569 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1570 o->op_type = OP_LEAVE;
22c35a8c 1571 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1572 }
1573 else {
1574 if (o->op_type == OP_LINESEQ) {
1575 OP *kid;
1576 o->op_type = OP_SCOPE;
22c35a8c 1577 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
463ee0b2 1578 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1579 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1580 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1581 null(kid);
748a9306 1582 }
463ee0b2
LW		 1583 }
1584 else
748a9306 1585 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1586 }
79072805
LW		 1587 }
1588 return o;
1589}
1590
b3ac6de7
IZ		 1591void
1592save_hints(void)
1593{
3280af22
NIS		 1594 SAVEI32(PL_hints);
1595 SAVESPTR(GvHV(PL_hintgv));
1596 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1597 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1598}
1599
a0d0e21e 1600int
8ac85365 1601block_start(int full)
79072805 1602{
11343788 1603 dTHR;
3280af22 1604 int retval = PL_savestack_ix;
b3ac6de7 1605
3280af22 1606 SAVEI32(PL_comppad_name_floor);
55497cff 1607 if (full) {
3280af22
NIS		 1608 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1609 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1610 else
3280af22
NIS		 1611 PL_comppad_name_floor = 0;
1612 }
1613 SAVEI32(PL_min_intro_pending);
1614 SAVEI32(PL_max_intro_pending);
1615 PL_min_intro_pending = 0;
1616 SAVEI32(PL_comppad_name_fill);
1617 SAVEI32(PL_padix_floor);
1618 PL_padix_floor = PL_padix;
1619 PL_pad_reset_pending = FALSE;
b3ac6de7 1620 SAVEHINTS();
3280af22 1621 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1622 SAVEPPTR(PL_compiling.cop_warnings);
599cee73
PM		 1623 if (PL_compiling.cop_warnings != WARN_ALL &&
1624 PL_compiling.cop_warnings != WARN_NONE) {
1625 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1626 SAVEFREESV(PL_compiling.cop_warnings) ;
1627 }
1628
1629
a0d0e21e
LW		 1630 return retval;
1631}
1632
1633OP*
8ac85365 1634block_end(I32 floor, OP *seq)
a0d0e21e 1635{
11343788 1636 dTHR;
3280af22 1637 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1638 OP* retval = scalarseq(seq);
a0d0e21e 1639 LEAVE_SCOPE(floor);
3280af22 1640 PL_pad_reset_pending = FALSE;
e24b16f9 1641 PL_compiling.op_private = PL_hints;
a0d0e21e 1642 if (needblockscope)
3280af22
NIS		 1643 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1644 pad_leavemy(PL_comppad_name_fill);
1645 PL_cop_seqmax++;
a0d0e21e
LW		 1646 return retval;
1647}
1648
76e3520e 1649STATIC OP *
54b9620d
MB		 1650newDEFSVOP(void)
1651{
1652#ifdef USE_THREADS
1653 OP *o = newOP(OP_THREADSV, 0);
1654 o->op_targ = find_threadsv("_");
1655 return o;
1656#else
3280af22 1657 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1658#endif /* USE_THREADS */
1659}
1660
a0d0e21e 1661void
8ac85365 1662newPROG(OP *o)
a0d0e21e 1663{
11343788 1664 dTHR;
3280af22
NIS		 1665 if (PL_in_eval) {
1666 PL_eval_root = newUNOP(OP_LEAVEEVAL, ((PL_in_eval & 4) ? OPf_SPECIAL : 0), o);
1667 PL_eval_start = linklist(PL_eval_root);
1668 PL_eval_root->op_next = 0;
1669 peep(PL_eval_start);
a0d0e21e
LW		 1670 }
1671 else {
5dc0d613 1672 if (!o)
a0d0e21e 1673 return;
3280af22
NIS		 1674 PL_main_root = scope(sawparens(scalarvoid(o)));
1675 PL_curcop = &PL_compiling;
1676 PL_main_start = LINKLIST(PL_main_root);
1677 PL_main_root->op_next = 0;
1678 peep(PL_main_start);
1679 PL_compcv = 0;
3841441e 1680
4fdae800 1681 /* Register with debugger */
84902520 1682 if (PERLDB_INTER) {
3841441e 1683 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1684 if (cv) {
1685 dSP;
924508f0 1686 PUSHMARK(SP);
3280af22 1687 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e
CS		 1688 PUTBACK;
1689 perl_call_sv((SV*)cv, G_DISCARD);
1690 }
1691 }
79072805 1692 }
79072805
LW		 1693}
1694
1695OP *
8ac85365 1696localize(OP *o, I32 lex)
79072805
LW		 1697{
1698 if (o->op_flags & OPf_PARENS)
1699 list(o);
8990e307 1700 else {
d008e5eb 1701 dTHR;
599cee73 1702 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1703 char *s;
834a4ddd 1704 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1705 if (*s == ';' || *s == '=')
599cee73
PM		 1706 warner(WARN_PARENTHESIS, "Parens missing around \"%s\" list",
1707 lex ? "my" : "local");
8990e307
LW		 1708 }
1709 }
3280af22
NIS		 1710 PL_in_my = FALSE;
1711 PL_in_my_stash = Nullhv;
93a17b20
LW		 1712 if (lex)
1713 return my(o);
1714 else
463ee0b2 1715 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1716}
1717
1718OP *
8ac85365 1719jmaybe(OP *o)
79072805
LW		 1720{
1721 if (o->op_type == OP_LIST) {
554b3eca
MB		 1722 OP *o2;
1723#ifdef USE_THREADS
2faa37cc 1724 o2 = newOP(OP_THREADSV, 0);
54b9620d 1725 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1726#else
1727 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1728#endif /* USE_THREADS */
1729 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1730 }
1731 return o;
1732}
1733
1734OP *
8ac85365 1735fold_constants(register OP *o)
79072805 1736{
11343788 1737 dTHR;
79072805
LW		 1738 register OP *curop;
1739 I32 type = o->op_type;
748a9306 1740 SV *sv;
79072805 1741
22c35a8c 1742 if (PL_opargs[type] & OA_RETSCALAR)
79072805 1743 scalar(o);
22c35a8c 1744 if (PL_opargs[type] & OA_TARGET)
ed6116ce 1745 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1746
22c35a8c
GS		 1747 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER))
1748 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
85e6fe83 1749
22c35a8c 1750 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 1751 goto nope;
1752
de939608
CS		 1753 switch (type) {
1754 case OP_SPRINTF:
1755 case OP_UCFIRST:
1756 case OP_LCFIRST:
1757 case OP_UC:
1758 case OP_LC:
69dcf70c
MB		 1759 case OP_SLT:
1760 case OP_SGT:
1761 case OP_SLE:
1762 case OP_SGE:
1763 case OP_SCMP:
1764
de939608
CS		 1765 if (o->op_private & OPpLOCALE)
1766 goto nope;
1767 }
1768
3280af22 1769 if (PL_error_count)
a0d0e21e
LW		 1770 goto nope; /* Don't try to run w/ errors */
1771
79072805 1772 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1773 if (curop->op_type != OP_CONST &&
1774 curop->op_type != OP_LIST &&
1775 curop->op_type != OP_SCALAR &&
a0d0e21e 1776 curop->op_type != OP_NULL &&
93a17b20 1777 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1778 goto nope;
1779 }
1780 }
1781
1782 curop = LINKLIST(o);
1783 o->op_next = 0;
533c011a 1784 PL_op = curop;
76e3520e 1785 CALLRUNOPS();
3280af22 1786 sv = *(PL_stack_sp--);
748a9306 1787 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1788 pad_swipe(o->op_targ);
748a9306
LW		 1789 else if (SvTEMP(sv)) { /* grab mortal temp? */
1790 (void)SvREFCNT_inc(sv);
1791 SvTEMP_off(sv);
85e6fe83 1792 }
79072805
LW		 1793 op_free(o);
1794 if (type == OP_RV2GV)
b1cb66bf 1795 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1796 else {
ee580363
GS		 1797 /* try to smush double to int, but don't smush -2.0 to -2 */
1798 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1799 type != OP_NEGATE)
1800 {
748a9306 1801 IV iv = SvIV(sv);
ee580363 1802 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1803 SvREFCNT_dec(sv);
1804 sv = newSViv(iv);
1805 }
b1cb66bf 1806 else
1807 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1808 }
1809 return newSVOP(OP_CONST, 0, sv);
1810 }
aeea060c 1811
79072805 1812 nope:
22c35a8c 1813 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 1814 return o;
79072805 1815
3280af22 1816 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1817 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1818 return o;
1819
1820 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1821 if (curop->op_type == OP_CONST) {
b1cb66bf 1822 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1823 continue;
1824 return o;
1825 }
22c35a8c 1826 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1827 continue;
1828 return o;
1829 }
22c35a8c 1830 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 1831 }
1832
79072805
LW		 1833 return o;
1834}
1835
1836OP *
8ac85365 1837gen_constant_list(register OP *o)
79072805 1838{
11343788 1839 dTHR;
79072805 1840 register OP *curop;
3280af22 1841 I32 oldtmps_floor = PL_tmps_floor;
79072805 1842
a0d0e21e 1843 list(o);
3280af22 1844 if (PL_error_count)
a0d0e21e
LW		 1845 return o; /* Don't attempt to run with errors */
1846
533c011a 1847 PL_op = curop = LINKLIST(o);
a0d0e21e 1848 o->op_next = 0;
11343788 1849 pp_pushmark(ARGS);
76e3520e 1850 CALLRUNOPS();
533c011a 1851 PL_op = curop;
11343788 1852 pp_anonlist(ARGS);
3280af22 1853 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1854
1855 o->op_type = OP_RV2AV;
22c35a8c 1856 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 1857 curop = ((UNOP*)o)->op_first;
3280af22 1858 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1859 op_free(curop);
79072805
LW		 1860 linklist(o);
1861 return list(o);
1862}
1863
1864OP *
8ac85365 1865convert(I32 type, I32 flags, OP *o)
79072805
LW		 1866{
1867 OP *kid;
a0d0e21e 1868 OP *last = 0;
79072805 1869
11343788
MB		 1870 if (!o || o->op_type != OP_LIST)
1871 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1872 else
5dc0d613 1873 o->op_flags &= ~OPf_WANT;
79072805 1874
22c35a8c 1875 if (!(PL_opargs[type] & OA_MARK))
11343788 1876 null(cLISTOPo->op_first);
8990e307 1877
11343788 1878 o->op_type = type;
22c35a8c 1879 o->op_ppaddr = PL_ppaddr[type];
11343788 1880 o->op_flags |= flags;
79072805 1881
11343788
MB		 1882 o = CHECKOP(type, o);
1883 if (o->op_type != type)
1884 return o;
79072805 1885
11343788 1886 if (cLISTOPo->op_children < 7) {
79072805 1887 /* XXX do we really need to do this if we're done appending?? */
11343788 1888 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1889 last = kid;
11343788 1890 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1891 }
1892
11343788 1893 return fold_constants(o);
79072805
LW		 1894}
1895
1896/* List constructors */
1897
1898OP *
8ac85365 1899append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1900{
1901 if (!first)
1902 return last;
8990e307
LW		 1903
1904 if (!last)
79072805 1905 return first;
8990e307 1906
a0d0e21e
LW		 1907 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1908 return newLISTOP(type, 0, first, last);
79072805 1909
a0d0e21e
LW		 1910 if (first->op_flags & OPf_KIDS)
1911 ((LISTOP*)first)->op_last->op_sibling = last;
1912 else {
1913 first->op_flags |= OPf_KIDS;
1914 ((LISTOP*)first)->op_first = last;
1915 }
1916 ((LISTOP*)first)->op_last = last;
1917 ((LISTOP*)first)->op_children++;
1918 return first;
79072805
LW		 1919}
1920
1921OP *
8ac85365 1922append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1923{
1924 if (!first)
1925 return (OP*)last;
8990e307
LW		 1926
1927 if (!last)
79072805 1928 return (OP*)first;
8990e307
LW		 1929
1930 if (first->op_type != type)
79072805 1931 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1932
1933 if (last->op_type != type)
79072805
LW		 1934 return append_elem(type, (OP*)first, (OP*)last);
1935
1936 first->op_last->op_sibling = last->op_first;
1937 first->op_last = last->op_last;
1938 first->op_children += last->op_children;
1939 if (first->op_children)
acb74605 1940 first->op_flags |= OPf_KIDS;
79072805
LW		 1941
1942 Safefree(last);
1943 return (OP*)first;
1944}
1945
1946OP *
8ac85365 1947prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1948{
1949 if (!first)
1950 return last;
8990e307
LW		 1951
1952 if (!last)
79072805 1953 return first;
8990e307
LW		 1954
1955 if (last->op_type == type) {
1956 if (type == OP_LIST) { /* already a PUSHMARK there */
1957 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1958 ((LISTOP*)last)->op_first->op_sibling = first;
1959 }
1960 else {
1961 if (!(last->op_flags & OPf_KIDS)) {
1962 ((LISTOP*)last)->op_last = first;
1963 last->op_flags |= OPf_KIDS;
1964 }
1965 first->op_sibling = ((LISTOP*)last)->op_first;
1966 ((LISTOP*)last)->op_first = first;
79072805 1967 }
79072805
LW		 1968 ((LISTOP*)last)->op_children++;
1969 return last;
1970 }
1971
1972 return newLISTOP(type, 0, first, last);
1973}
1974
1975/* Constructors */
1976
1977OP *
8ac85365 1978newNULLLIST(void)
79072805 1979{
8990e307
LW		 1980 return newOP(OP_STUB, 0);
1981}
1982
1983OP *
8ac85365 1984force_list(OP *o)
8990e307 1985{
11343788
MB		 1986 if (!o || o->op_type != OP_LIST)
1987 o = newLISTOP(OP_LIST, 0, o, Nullop);
1988 null(o);
1989 return o;
79072805
LW		 1990}
1991
1992OP *
8ac85365 1993newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1994{
1995 LISTOP *listop;
1996
1997 Newz(1101, listop, 1, LISTOP);
1998
1999 listop->op_type = type;
22c35a8c 2000 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2001 listop->op_children = (first != 0) + (last != 0);
2002 listop->op_flags = flags;
79072805
LW		 2003
2004 if (!last && first)
2005 last = first;
2006 else if (!first && last)
2007 first = last;
8990e307
LW		 2008 else if (first)
2009 first->op_sibling = last;
79072805
LW		 2010 listop->op_first = first;
2011 listop->op_last = last;
8990e307
LW		 2012 if (type == OP_LIST) {
2013 OP* pushop;
2014 pushop = newOP(OP_PUSHMARK, 0);
2015 pushop->op_sibling = first;
2016 listop->op_first = pushop;
2017 listop->op_flags |= OPf_KIDS;
2018 if (!last)
2019 listop->op_last = pushop;
2020 }
2021 else if (listop->op_children)
2022 listop->op_flags |= OPf_KIDS;
79072805
LW		 2023
2024 return (OP*)listop;
2025}
2026
2027OP *
8ac85365 2028newOP(I32 type, I32 flags)
79072805 2029{
11343788
MB		 2030 OP *o;
2031 Newz(1101, o, 1, OP);
2032 o->op_type = type;
22c35a8c 2033 o->op_ppaddr = PL_ppaddr[type];
11343788 2034 o->op_flags = flags;
79072805 2035
11343788
MB		 2036 o->op_next = o;
2037 o->op_private = 0 + (flags >> 8);
22c35a8c 2038 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2039 scalar(o);
22c35a8c 2040 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2041 o->op_targ = pad_alloc(type, SVs_PADTMP);
2042 return CHECKOP(type, o);
79072805
LW		 2043}
2044
2045OP *
8ac85365 2046newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 2047{
2048 UNOP *unop;
2049
93a17b20 2050 if (!first)
aeea060c 2051 first = newOP(OP_STUB, 0);
22c35a8c 2052 if (PL_opargs[type] & OA_MARK)
8990e307 2053 first = force_list(first);
93a17b20 2054
79072805
LW		 2055 Newz(1101, unop, 1, UNOP);
2056 unop->op_type = type;
22c35a8c 2057 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2058 unop->op_first = first;
2059 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2060 unop->op_private = 1 | (flags >> 8);
e50aee73 2061 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2062 if (unop->op_next)
2063 return (OP*)unop;
2064
a0d0e21e 2065 return fold_constants((OP *) unop);
79072805
LW		 2066}
2067
2068OP *
8ac85365 2069newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2070{
2071 BINOP *binop;
2072 Newz(1101, binop, 1, BINOP);
2073
2074 if (!first)
2075 first = newOP(OP_NULL, 0);
2076
2077 binop->op_type = type;
22c35a8c 2078 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2079 binop->op_first = first;
2080 binop->op_flags = flags | OPf_KIDS;
2081 if (!last) {
2082 last = first;
c07a80fd 2083 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2084 }
2085 else {
c07a80fd 2086 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2087 first->op_sibling = last;
2088 }
2089
e50aee73 2090 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2091 if (binop->op_next)
2092 return (OP*)binop;
2093
7284ab6f 2094 binop->op_last = binop->op_first->op_sibling;
79072805 2095
a0d0e21e 2096 return fold_constants((OP *)binop);
79072805
LW		 2097}
2098
a0ed51b3
LW		 2099static int
2100utf8compare(const void *a, const void *b)
2101{
2102 int i;
2103 for (i = 0; i < 10; i++) {
2104 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2105 return -1;
2106 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2107 return 1;
2108 }
2109 return 0;
2110}
2111
79072805 2112OP *
8ac85365 2113pmtrans(OP *o, OP *expr, OP *repl)
79072805 2114{
79072805
LW		 2115 SV *tstr = ((SVOP*)expr)->op_sv;
2116 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2117 STRLEN tlen;
2118 STRLEN rlen;
ec49126f 2119 register U8 *t = (U8*)SvPV(tstr, tlen);
2120 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2121 register I32 i;
2122 register I32 j;
a0ed51b3 2123 I32 del;
79072805 2124 I32 complement;
5d06d08e 2125 I32 squash;
79072805
LW		 2126 register short *tbl;
2127
11343788 2128 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2129 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2130 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2131
a0ed51b3
LW		 2132 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
2133 SV* listsv = newSVpv("# comment\n",0);
2134 SV* transv = 0;
2135 U8* tend = t + tlen;
2136 U8* rend = r + rlen;
2137 I32 ulen;
2138 U32 tfirst = 1;
2139 U32 tlast = 0;
2140 I32 tdiff;
2141 U32 rfirst = 1;
2142 U32 rlast = 0;
2143 I32 rdiff;
2144 I32 diff;
2145 I32 none = 0;
2146 U32 max = 0;
2147 I32 bits;
2148 I32 grows = 0;
2149 I32 havefinal = 0;
2150 U32 final;
2151 HV *hv;
2152 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2153 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2154
2155 if (complement) {
2156 U8 tmpbuf[10];
2157 U8** cp;
2158 UV nextmin = 0;
2159 New(1109, cp, tlen, U8*);
2160 i = 0;
2161 transv = newSVpv("",0);
2162 while (t < tend) {
2163 cp[i++] = t;
2164 t += UTF8SKIP(t);
2165 if (*t == 0xff) {
2166 t++;
2167 t += UTF8SKIP(t);
2168 }
2169 }
2170 qsort(cp, i, sizeof(U8*), utf8compare);
2171 for (j = 0; j < i; j++) {
2172 U8 *s = cp[j];
2173 UV val = utf8_to_uv(s, &ulen);
2174 s += ulen;
2175 diff = val - nextmin;
2176 if (diff > 0) {
2177 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2178 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2179 if (diff > 1) {
2180 t = uv_to_utf8(tmpbuf, val - 1);
2181 sv_catpvn(transv, "\377", 1);
dfe13c55 2182 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2183 }
2184 }
2185 if (*s == 0xff)
2186 val = utf8_to_uv(s+1, &ulen);
2187 if (val >= nextmin)
2188 nextmin = val + 1;
2189 }
2190 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2191 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2192 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2193 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2194 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2195 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2196 tlen = SvCUR(transv);
2197 tend = t + tlen;
2198 }
2199 else if (!rlen && !del) {
2200 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2201 }
2202 if (!squash) {
2203 if (to_utf && from_utf) { /* only counting characters */
2204 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2205 o->op_private |= OPpTRANS_IDENTICAL;
2206 }
2207 else { /* straight latin-1 translation */
2208 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2209 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2210 o->op_private |= OPpTRANS_IDENTICAL;
2211 }
a0ed51b3
LW		 2212 }
2213
2214 while (t < tend || tfirst <= tlast) {
2215 /* see if we need more "t" chars */
2216 if (tfirst > tlast) {
2217 tfirst = (I32)utf8_to_uv(t, &ulen);
2218 t += ulen;
2219 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2220 tlast = (I32)utf8_to_uv(++t, &ulen);
2221 t += ulen;
2222 }
2223 else
2224 tlast = tfirst;
2225 }
2226
2227 /* now see if we need more "r" chars */
2228 if (rfirst > rlast) {
2229 if (r < rend) {
2230 rfirst = (I32)utf8_to_uv(r, &ulen);
2231 r += ulen;
2232 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2233 rlast = (I32)utf8_to_uv(++r, &ulen);
2234 r += ulen;
2235 }
2236 else
2237 rlast = rfirst;
2238 }
2239 else {
2240 if (!havefinal++)
2241 final = rlast;
2242 rfirst = rlast = 0xffffffff;
2243 }
2244 }
2245
2246 /* now see which range will peter our first, if either. */
2247 tdiff = tlast - tfirst;
2248 rdiff = rlast - rfirst;
2249
2250 if (tdiff <= rdiff)
2251 diff = tdiff;
2252 else
2253 diff = rdiff;
2254
2255 if (rfirst == 0xffffffff) {
2256 diff = tdiff; /* oops, pretend rdiff is infinite */
2257 if (diff > 0)
2258 sv_catpvf(listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
2259 else
2260 sv_catpvf(listsv, "%04x\t\tXXXX\n", tfirst);
2261 }
2262 else {
2263 if (diff > 0)
2264 sv_catpvf(listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
2265 else
2266 sv_catpvf(listsv, "%04x\t\t%04x\n", tfirst, rfirst);
2267
2268 if (rfirst + diff > max)
2269 max = rfirst + diff;
2270 rfirst += diff + 1;
2271 if (!grows) {
2272 if (rfirst <= 0x80)
2273 ;
2274 else if (rfirst <= 0x800)
2275 grows |= (tfirst < 0x80);
2276 else if (rfirst <= 0x10000)
2277 grows |= (tfirst < 0x800);
2278 else if (rfirst <= 0x200000)
2279 grows |= (tfirst < 0x10000);
2280 else if (rfirst <= 0x4000000)
2281 grows |= (tfirst < 0x200000);
2282 else if (rfirst <= 0x80000000)
2283 grows |= (tfirst < 0x4000000);
2284 }
2285 }
2286 tfirst += diff + 1;
2287 }
2288
2289 none = ++max;
2290 if (del)
2291 del = ++max;
2292
2293 if (max > 0xffff)
2294 bits = 32;
2295 else if (max > 0xff)
2296 bits = 16;
2297 else
2298 bits = 8;
2299
2300 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2301 SvREFCNT_dec(listsv);
2302 if (transv)
2303 SvREFCNT_dec(transv);
2304
2305 if (!del && havefinal)
2306 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2307
2308 if (grows && to_utf)
2309 o->op_private |= OPpTRANS_GROWS;
2310
2311 op_free(expr);
2312 op_free(repl);
2313 return o;
2314 }
2315
2316 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2317 if (complement) {
2318 Zero(tbl, 256, short);
2319 for (i = 0; i < tlen; i++)
ec49126f 2320 tbl[t[i]] = -1;
79072805
LW		 2321 for (i = 0, j = 0; i < 256; i++) {
2322 if (!tbl[i]) {
2323 if (j >= rlen) {
a0ed51b3 2324 if (del)
79072805
LW		 2325 tbl[i] = -2;
2326 else if (rlen)
ec49126f 2327 tbl[i] = r[j-1];
79072805
LW		 2328 else
2329 tbl[i] = i;
2330 }
2331 else
ec49126f 2332 tbl[i] = r[j++];
79072805
LW		 2333 }
2334 }
2335 }
2336 else {
a0ed51b3 2337 if (!rlen && !del) {
79072805 2338 r = t; rlen = tlen;
5d06d08e 2339 if (!squash)
4757a243 2340 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2341 }
2342 for (i = 0; i < 256; i++)
2343 tbl[i] = -1;
2344 for (i = 0, j = 0; i < tlen; i++,j++) {
2345 if (j >= rlen) {
a0ed51b3 2346 if (del) {
ec49126f 2347 if (tbl[t[i]] == -1)
2348 tbl[t[i]] = -2;
79072805
LW		 2349 continue;
2350 }
2351 --j;
2352 }
ec49126f 2353 if (tbl[t[i]] == -1)
2354 tbl[t[i]] = r[j];
79072805
LW		 2355 }
2356 }
2357 op_free(expr);
2358 op_free(repl);
2359
11343788 2360 return o;
79072805
LW		 2361}
2362
2363OP *
8ac85365 2364newPMOP(I32 type, I32 flags)
79072805 2365{
11343788 2366 dTHR;
79072805
LW		 2367 PMOP *pmop;
2368
2369 Newz(1101, pmop, 1, PMOP);
2370 pmop->op_type = type;
22c35a8c 2371 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2372 pmop->op_flags = flags;
c07a80fd 2373 pmop->op_private = 0 | (flags >> 8);
79072805 2374
3280af22 2375 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2376 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2377 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2378 pmop->op_pmpermflags |= PMf_LOCALE;
2379 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2380
79072805 2381 /* link into pm list */
3280af22
NIS		 2382 if (type != OP_TRANS && PL_curstash) {
2383 pmop->op_pmnext = HvPMROOT(PL_curstash);
2384 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2385 }
2386
2387 return (OP*)pmop;
2388}
2389
2390OP *
8ac85365 2391pmruntime(OP *o, OP *expr, OP *repl)
79072805 2392{
5c0ca799 2393 dTHR;
79072805
LW		 2394 PMOP *pm;
2395 LOGOP *rcop;
ce862d02 2396 I32 repl_has_vars = 0;
79072805 2397
11343788
MB		 2398 if (o->op_type == OP_TRANS)
2399 return pmtrans(o, expr, repl);
79072805 2400
3280af22 2401 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2402 pm = (PMOP*)o;
79072805
LW		 2403
2404 if (expr->op_type == OP_CONST) {
463ee0b2 2405 STRLEN plen;
79072805 2406 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2407 char *p = SvPV(pat, plen);
11343788 2408 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2409 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2410 p = SvPV(pat, plen);
79072805
LW		 2411 pm->op_pmflags |= PMf_SKIPWHITE;
2412 }
15e52e56 2413 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2414 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2415 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2416 op_free(expr);
2417 }
2418 else {
3280af22
NIS		 2419 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2420 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2421 ? OP_REGCRESET
2422 : OP_REGCMAYBE),0,expr);
463ee0b2 2423
79072805
LW		 2424 Newz(1101, rcop, 1, LOGOP);
2425 rcop->op_type = OP_REGCOMP;
22c35a8c 2426 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2427 rcop->op_first = scalar(expr);
3280af22 2428 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2429 ? (OPf_SPECIAL | OPf_KIDS)
2430 : OPf_KIDS);
79072805 2431 rcop->op_private = 1;
11343788 2432 rcop->op_other = o;
79072805
LW		 2433
2434 /* establish postfix order */
3280af22 2435 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2436 LINKLIST(expr);
2437 rcop->op_next = expr;
2438 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2439 }
2440 else {
2441 rcop->op_next = LINKLIST(expr);
2442 expr->op_next = (OP*)rcop;
2443 }
79072805 2444
11343788 2445 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2446 }
2447
2448 if (repl) {
748a9306
LW		 2449 OP *curop;
2450 if (pm->op_pmflags & PMf_EVAL)
2451 curop = 0;
554b3eca 2452#ifdef USE_THREADS
2faa37cc 2453 else if (repl->op_type == OP_THREADSV
554b3eca 2454 && strchr("&`'123456789+",
533c011a 2455 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2456 {
2457 curop = 0;
2458 }
2459#endif /* USE_THREADS */
748a9306
LW		 2460 else if (repl->op_type == OP_CONST)
2461 curop = repl;
79072805 2462 else {
79072805
LW		 2463 OP *lastop = 0;
2464 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2465 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2466#ifdef USE_THREADS
ce862d02
IZ		 2467 if (curop->op_type == OP_THREADSV) {
2468 repl_has_vars = 1;
be949f6f 2469 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2470 break;
554b3eca
MB		 2471 }
2472#else
79072805
LW		 2473 if (curop->op_type == OP_GV) {
2474 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2475 repl_has_vars = 1;
93a17b20 2476 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2477 break;
2478 }
554b3eca 2479#endif /* USE_THREADS */
79072805
LW		 2480 else if (curop->op_type == OP_RV2CV)
2481 break;
2482 else if (curop->op_type == OP_RV2SV ||
2483 curop->op_type == OP_RV2AV ||
2484 curop->op_type == OP_RV2HV ||
2485 curop->op_type == OP_RV2GV) {
2486 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2487 break;
2488 }
748a9306
LW		 2489 else if (curop->op_type == OP_PADSV ||
2490 curop->op_type == OP_PADAV ||
2491 curop->op_type == OP_PADHV ||
554b3eca 2492 curop->op_type == OP_PADANY) {
ce862d02 2493 repl_has_vars = 1;
748a9306 2494 }
1167e5da
SM		 2495 else if (curop->op_type == OP_PUSHRE)
2496 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2497 else
2498 break;
2499 }
2500 lastop = curop;
2501 }
748a9306 2502 }
ce862d02
IZ		 2503 if (curop == repl
2504 && !(repl_has_vars
2505 && (!pm->op_pmregexp
2506 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2507 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2508 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2509 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2510 }
2511 else {
ce862d02
IZ		 2512 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2513 pm->op_pmflags |= PMf_MAYBE_CONST;
2514 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2515 }
748a9306
LW		 2516 Newz(1101, rcop, 1, LOGOP);
2517 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2518 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2519 rcop->op_first = scalar(repl);
2520 rcop->op_flags |= OPf_KIDS;
2521 rcop->op_private = 1;
11343788 2522 rcop->op_other = o;
748a9306
LW		 2523
2524 /* establish postfix order */
2525 rcop->op_next = LINKLIST(repl);
2526 repl->op_next = (OP*)rcop;
2527
2528 pm->op_pmreplroot = scalar((OP*)rcop);
2529 pm->op_pmreplstart = LINKLIST(rcop);
2530 rcop->op_next = 0;
79072805
LW		 2531 }
2532 }
2533
2534 return (OP*)pm;
2535}
2536
2537OP *
8ac85365 2538newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2539{
2540 SVOP *svop;
2541 Newz(1101, svop, 1, SVOP);
2542 svop->op_type = type;
22c35a8c 2543 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2544 svop->op_sv = sv;
2545 svop->op_next = (OP*)svop;
2546 svop->op_flags = flags;
22c35a8c 2547 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2548 scalar((OP*)svop);
22c35a8c 2549 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2550 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2551 return CHECKOP(type, svop);
79072805
LW		 2552}
2553
2554OP *
8ac85365 2555newGVOP(I32 type, I32 flags, GV *gv)
79072805 2556{
11343788 2557 dTHR;
79072805
LW		 2558 GVOP *gvop;
2559 Newz(1101, gvop, 1, GVOP);
2560 gvop->op_type = type;
22c35a8c 2561 gvop->op_ppaddr = PL_ppaddr[type];
8990e307 2562 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2563 gvop->op_next = (OP*)gvop;
2564 gvop->op_flags = flags;
22c35a8c 2565 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2566 scalar((OP*)gvop);
22c35a8c 2567 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2568 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2569 return CHECKOP(type, gvop);
79072805
LW		 2570}
2571
2572OP *
8ac85365 2573newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2574{
2575 PVOP *pvop;
2576 Newz(1101, pvop, 1, PVOP);
2577 pvop->op_type = type;
22c35a8c 2578 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2579 pvop->op_pv = pv;
2580 pvop->op_next = (OP*)pvop;
2581 pvop->op_flags = flags;
22c35a8c 2582 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2583 scalar((OP*)pvop);
22c35a8c 2584 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2585 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2586 return CHECKOP(type, pvop);
79072805
LW		 2587}
2588
79072805 2589void
8ac85365 2590package(OP *o)
79072805 2591{
11343788 2592 dTHR;
93a17b20 2593 SV *sv;
79072805 2594
3280af22
NIS		 2595 save_hptr(&PL_curstash);
2596 save_item(PL_curstname);
11343788 2597 if (o) {
463ee0b2
LW		 2598 STRLEN len;
2599 char *name;
11343788 2600 sv = cSVOPo->op_sv;
463ee0b2 2601 name = SvPV(sv, len);
3280af22
NIS		 2602 PL_curstash = gv_stashpvn(name,len,TRUE);
2603 sv_setpvn(PL_curstname, name, len);
11343788 2604 op_free(o);
93a17b20
LW		 2605 }
2606 else {
3280af22
NIS		 2607 sv_setpv(PL_curstname,"<none>");
2608 PL_curstash = Nullhv;
93a17b20 2609 }
7ad382f4 2610 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2611 PL_copline = NOLINE;
2612 PL_expect = XSTATE;
79072805
LW		 2613}
2614
85e6fe83 2615void
8ac85365 2616utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2617{
a0d0e21e
LW		 2618 OP *pack;
2619 OP *meth;
2620 OP *rqop;
2621 OP *imop;
b1cb66bf 2622 OP *veop;
78ca652e 2623 GV *gv;
85e6fe83 2624
a0d0e21e
LW		 2625 if (id->op_type != OP_CONST)
2626 croak("Module name must be constant");
85e6fe83 2627
b1cb66bf 2628 veop = Nullop;
2629
2630 if(version != Nullop) {
2631 SV *vesv = ((SVOP*)version)->op_sv;
2632
2633 if (arg == Nullop && !SvNIOK(vesv)) {
2634 arg = version;
2635 }
2636 else {
2637 OP *pack;
2638 OP *meth;
2639
2640 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2641 croak("Version number must be constant number");
2642
2643 /* Make copy of id so we don't free it twice */
2644 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2645
2646 /* Fake up a method call to VERSION */
2647 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2648 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2649 append_elem(OP_LIST,
2650 prepend_elem(OP_LIST, pack, list(version)),
2651 newUNOP(OP_METHOD, 0, meth)));
2652 }
2653 }
aeea060c 2654
a0d0e21e 2655 /* Fake up an import/unimport */
4633a7c4
LW		 2656 if (arg && arg->op_type == OP_STUB)
2657 imop = arg; /* no import on explicit () */
b1cb66bf 2658 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2659 imop = Nullop; /* use 5.0; */
2660 }
4633a7c4
LW		 2661 else {
2662 /* Make copy of id so we don't free it twice */
2663 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2664 meth = newSVOP(OP_CONST, 0,
2665 aver
2666 ? newSVpv("import", 6)
2667 : newSVpv("unimport", 8)
2668 );
2669 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2670 append_elem(OP_LIST,
2671 prepend_elem(OP_LIST, pack, list(arg)),
2672 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2673 }
2674
78ca652e
GS		 2675 /* Fake up a require, handle override, if any */
2676 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2677 if (!(gv && GvIMPORTED_CV(gv)))
2678 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2679
2680 if (gv && GvIMPORTED_CV(gv)) {
2681 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2682 append_elem(OP_LIST, id,
2683 scalar(newUNOP(OP_RV2CV, 0,
2684 newGVOP(OP_GV, 0,
2685 gv))))));
2686 }
2687 else {
2688 rqop = newUNOP(OP_REQUIRE, 0, id);
2689 }
a0d0e21e
LW		 2690
2691 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2692 newSUB(floor,
a0d0e21e 2693 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2694 Nullop,
a0d0e21e 2695 append_elem(OP_LINESEQ,
b1cb66bf 2696 append_elem(OP_LINESEQ,
2697 newSTATEOP(0, Nullch, rqop),
2698 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2699 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2700
3280af22
NIS		 2701 PL_copline = NOLINE;
2702 PL_expect = XSTATE;
85e6fe83
LW		 2703}
2704
79072805 2705OP *
78ca652e
GS		 2706dofile(OP *term)
2707{
2708 OP *doop;
2709 GV *gv;
2710
2711 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2712 if (!(gv && GvIMPORTED_CV(gv)))
2713 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2714
2715 if (gv && GvIMPORTED_CV(gv)) {
2716 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2717 append_elem(OP_LIST, term,
2718 scalar(newUNOP(OP_RV2CV, 0,
2719 newGVOP(OP_GV, 0,
2720 gv))))));
2721 }
2722 else {
2723 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2724 }
2725 return doop;
2726}
2727
2728OP *
8ac85365 2729newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2730{
2731 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2732 list(force_list(subscript)),
2733 list(force_list(listval)) );
79072805
LW		 2734}
2735
76e3520e 2736STATIC I32
8ac85365 2737list_assignment(register OP *o)
79072805 2738{
11343788 2739 if (!o)
79072805
LW		 2740 return TRUE;
2741
11343788
MB		 2742 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2743 o = cUNOPo->op_first;
79072805 2744
11343788
MB		 2745 if (o->op_type == OP_COND_EXPR) {
2746 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2747 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2748
2749 if (t && f)
2750 return TRUE;
2751 if (t || f)
2752 yyerror("Assignment to both a list and a scalar");
2753 return FALSE;
2754 }
2755
11343788
MB		 2756 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2757 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2758 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2759 return TRUE;
2760
11343788 2761 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2762 return TRUE;
2763
11343788 2764 if (o->op_type == OP_RV2SV)
79072805
LW		 2765 return FALSE;
2766
2767 return FALSE;
2768}
2769
2770OP *
8ac85365 2771newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2772{
11343788 2773 OP *o;
79072805 2774
a0d0e21e
LW		 2775 if (optype) {
2776 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2777 return newLOGOP(optype, 0,
2778 mod(scalar(left), optype),
2779 newUNOP(OP_SASSIGN, 0, scalar(right)));
2780 }
2781 else {
2782 return newBINOP(optype, OPf_STACKED,
2783 mod(scalar(left), optype), scalar(right));
2784 }
2785 }
2786
79072805 2787 if (list_assignment(left)) {
6ee623d5 2788 dTHR;
3280af22
NIS		 2789 PL_modcount = 0;
2790 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2791 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2792 if (PL_eval_start)
2793 PL_eval_start = 0;
748a9306 2794 else {
a0d0e21e
LW		 2795 op_free(left);
2796 op_free(right);
2797 return Nullop;
2798 }
11343788 2799 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2800 list(force_list(right)),
2801 list(force_list(left)) );
11343788 2802 o->op_private = 0 | (flags >> 8);
a0d0e21e 2803 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2804 OP *curop;
11343788 2805 OP *lastop = o;
3280af22 2806 PL_generation++;
11343788 2807 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 2808 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805
LW		 2809 if (curop->op_type == OP_GV) {
2810 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2811 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2812 break;
3280af22 2813 SvCUR(gv) = PL_generation;
79072805 2814 }
748a9306
LW		 2815 else if (curop->op_type == OP_PADSV ||
2816 curop->op_type == OP_PADAV ||
2817 curop->op_type == OP_PADHV ||
2818 curop->op_type == OP_PADANY) {
3280af22 2819 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2820 SV *sv = svp[curop->op_targ];
3280af22 2821 if (SvCUR(sv) == PL_generation)
748a9306 2822 break;
3280af22 2823 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2824 }
79072805
LW		 2825 else if (curop->op_type == OP_RV2CV)
2826 break;
2827 else if (curop->op_type == OP_RV2SV ||
2828 curop->op_type == OP_RV2AV ||
2829 curop->op_type == OP_RV2HV ||
2830 curop->op_type == OP_RV2GV) {
2831 if (lastop->op_type != OP_GV) /* funny deref? */
2832 break;
2833 }
1167e5da
SM		 2834 else if (curop->op_type == OP_PUSHRE) {
2835 if (((PMOP*)curop)->op_pmreplroot) {
2836 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2837 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2838 break;
3280af22 2839 SvCUR(gv) = PL_generation;
1167e5da
SM		 2840 }
2841 }
79072805
LW		 2842 else
2843 break;
2844 }
2845 lastop = curop;
2846 }
11343788
MB		 2847 if (curop != o)
2848 o->op_private = OPpASSIGN_COMMON;
79072805 2849 }
c07a80fd 2850 if (right && right->op_type == OP_SPLIT) {
2851 OP* tmpop;
2852 if ((tmpop = ((LISTOP*)right)->op_first) &&
2853 tmpop->op_type == OP_PUSHRE)
2854 {
2855 PMOP *pm = (PMOP*)tmpop;
2856 if (left->op_type == OP_RV2AV &&
2857 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2858 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2859 {
2860 tmpop = ((UNOP*)left)->op_first;
2861 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2862 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2863 pm->op_pmflags |= PMf_ONCE;
11343788 2864 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2865 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2866 tmpop->op_sibling = Nullop; /* don't free split */
2867 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2868 op_free(o); /* blow off assign */
54310121 2869 right->op_flags &= ~OPf_WANT;
a5f75d66 2870 /* "I don't know and I don't care." */
c07a80fd 2871 return right;
2872 }
2873 }
2874 else {
3280af22 2875 if (PL_modcount < 10000 &&
c07a80fd 2876 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2877 {
2878 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2879 if (SvIVX(sv) == 0)
3280af22 2880 sv_setiv(sv, PL_modcount+1);
c07a80fd 2881 }
2882 }
2883 }
2884 }
11343788 2885 return o;
79072805
LW		 2886 }
2887 if (!right)
2888 right = newOP(OP_UNDEF, 0);
2889 if (right->op_type == OP_READLINE) {
2890 right->op_flags |= OPf_STACKED;
463ee0b2 2891 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2892 }
a0d0e21e 2893 else {
3280af22 2894 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2895 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2896 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 2897 if (PL_eval_start)
2898 PL_eval_start = 0;
748a9306 2899 else {
11343788 2900 op_free(o);
a0d0e21e
LW		 2901 return Nullop;
2902 }
2903 }
11343788 2904 return o;
79072805
LW		 2905}
2906
2907OP *
8ac85365 2908newSTATEOP(I32 flags, char *label, OP *o)
79072805 2909{
11343788 2910 dTHR;
bbce6d69 2911 U32 seq = intro_my();
79072805
LW		 2912 register COP *cop;
2913
2914 Newz(1101, cop, 1, COP);
3280af22 2915 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 2916 cop->op_type = OP_DBSTATE;
22c35a8c 2917 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 2918 }
2919 else {
2920 cop->op_type = OP_NEXTSTATE;
22c35a8c 2921 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 2922 }
79072805 2923 cop->op_flags = flags;
a0ed51b3 2924 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 2925#ifdef NATIVE_HINTS
2926 cop->op_private |= NATIVE_HINTS;
2927#endif
e24b16f9 2928 PL_compiling.op_private = cop->op_private;
79072805
LW		 2929 cop->op_next = (OP*)cop;
2930
463ee0b2
LW		 2931 if (label) {
2932 cop->cop_label = label;
3280af22 2933 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 2934 }
bbce6d69 2935 cop->cop_seq = seq;
3280af22 2936 cop->cop_arybase = PL_curcop->cop_arybase;
599cee73
PM		 2937 if (PL_curcop->cop_warnings == WARN_NONE
2938 || PL_curcop->cop_warnings == WARN_ALL)
2939 cop->cop_warnings = PL_curcop->cop_warnings ;
2940 else
2941 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
2942
79072805 2943
3280af22
NIS		 2944 if (PL_copline == NOLINE)
2945 cop->cop_line = PL_curcop->cop_line;
79072805 2946 else {
3280af22
NIS		 2947 cop->cop_line = PL_copline;
2948 PL_copline = NOLINE;
79072805 2949 }
3280af22
NIS		 2950 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
2951 cop->cop_stash = PL_curstash;
79072805 2952
3280af22
NIS		 2953 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2954 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2955 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 2956 (void)SvIOK_on(*svp);
a5f75d66 2957 SvIVX(*svp) = 1;
93a17b20
LW		 2958 SvSTASH(*svp) = (HV*)cop;
2959 }
2960 }
2961
11343788 2962 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2963}
2964
bbce6d69 2965/* "Introduce" my variables to visible status. */
2966U32
8ac85365 2967intro_my(void)
bbce6d69 2968{
2969 SV **svp;
2970 SV *sv;
2971 I32 i;
2972
3280af22
NIS		 2973 if (! PL_min_intro_pending)
2974 return PL_cop_seqmax;
bbce6d69 2975
3280af22
NIS		 2976 svp = AvARRAY(PL_comppad_name);
2977 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
2978 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 2979 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
3280af22 2980 SvNVX(sv) = (double)PL_cop_seqmax;
bbce6d69 2981 }
2982 }
3280af22
NIS		 2983 PL_min_intro_pending = 0;
2984 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
2985 return PL_cop_seqmax++;
bbce6d69 2986}
2987
79072805 2988OP *
8ac85365 2989newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2990{
883ffac3
CS		 2991 return new_logop(type, flags, &first, &other);
2992}
2993
3bd495df 2994STATIC OP *
883ffac3
CS		 2995new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2996{
11343788 2997 dTHR;
79072805 2998 LOGOP *logop;
11343788 2999 OP *o;
883ffac3
CS		 3000 OP *first = *firstp;
3001 OP *other = *otherp;
79072805 3002
a0d0e21e
LW		 3003 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
3004 return newBINOP(type, flags, scalar(first), scalar(other));
3005
8990e307 3006 scalarboolean(first);
79072805
LW		 3007 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
3008 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
3009 if (type == OP_AND || type == OP_OR) {
3010 if (type == OP_AND)
3011 type = OP_OR;
3012 else
3013 type = OP_AND;
11343788 3014 o = first;
883ffac3 3015 first = *firstp = cUNOPo->op_first;
11343788
MB		 3016 if (o->op_next)
3017 first->op_next = o->op_next;
3018 cUNOPo->op_first = Nullop;
3019 op_free(o);
79072805
LW		 3020 }
3021 }
3022 if (first->op_type == OP_CONST) {
599cee73
PM		 3023 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
3024 warner(WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3025 PL_op_desc[type]);
79072805
LW		 3026 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3027 op_free(first);
883ffac3 3028 *firstp = Nullop;
79072805
LW		 3029 return other;
3030 }
3031 else {
3032 op_free(other);
883ffac3 3033 *otherp = Nullop;
79072805
LW		 3034 return first;
3035 }
3036 }
3037 else if (first->op_type == OP_WANTARRAY) {
3038 if (type == OP_AND)
3039 list(other);
3040 else
3041 scalar(other);
3042 }
599cee73 3043 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3044 OP *k1 = ((UNOP*)first)->op_first;
3045 OP *k2 = k1->op_sibling;
3046 OPCODE warnop = 0;
3047 switch (first->op_type)
3048 {
3049 case OP_NULL:
3050 if (k2 && k2->op_type == OP_READLINE
3051 && (k2->op_flags & OPf_STACKED)
55d729e4 3052 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3053 warnop = k2->op_type;
3054 break;
3055
3056 case OP_SASSIGN:
68dc0745 3057 if (k1->op_type == OP_READDIR
3058 || k1->op_type == OP_GLOB
3059 || k1->op_type == OP_EACH)
a6006777 3060 warnop = k1->op_type;
3061 break;
3062 }
8ebc5c01 3063 if (warnop) {
3280af22
NIS		 3064 line_t oldline = PL_curcop->cop_line;
3065 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3066 warner(WARN_UNSAFE,
3067 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3068 PL_op_desc[warnop],
68dc0745 3069 ((warnop == OP_READLINE || warnop == OP_GLOB)
3070 ? " construct" : "() operator"));
3280af22 3071 PL_curcop->cop_line = oldline;
8ebc5c01 3072 }
a6006777 3073 }
79072805
LW		 3074
3075 if (!other)
3076 return first;
3077
a0d0e21e
LW		 3078 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3079 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3080
79072805
LW		 3081 Newz(1101, logop, 1, LOGOP);
3082
3083 logop->op_type = type;
22c35a8c 3084 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3085 logop->op_first = first;
3086 logop->op_flags = flags | OPf_KIDS;
3087 logop->op_other = LINKLIST(other);
c07a80fd 3088 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3089
3090 /* establish postfix order */
3091 logop->op_next = LINKLIST(first);
3092 first->op_next = (OP*)logop;
3093 first->op_sibling = other;
3094
11343788
MB		 3095 o = newUNOP(OP_NULL, 0, (OP*)logop);
3096 other->op_next = o;
79072805 3097
11343788 3098 return o;
79072805
LW		 3099}
3100
3101OP *
8ac85365 3102newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3103{
11343788 3104 dTHR;
79072805 3105 CONDOP *condop;
11343788 3106 OP *o;
79072805 3107
b1cb66bf 3108 if (!falseop)
3109 return newLOGOP(OP_AND, 0, first, trueop);
3110 if (!trueop)
3111 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3112
8990e307 3113 scalarboolean(first);
79072805
LW		 3114 if (first->op_type == OP_CONST) {
3115 if (SvTRUE(((SVOP*)first)->op_sv)) {
3116 op_free(first);
b1cb66bf 3117 op_free(falseop);
3118 return trueop;
79072805
LW		 3119 }
3120 else {
3121 op_free(first);
b1cb66bf 3122 op_free(trueop);
3123 return falseop;
79072805
LW		 3124 }
3125 }
3126 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3127 list(trueop);
3128 scalar(falseop);
79072805
LW		 3129 }
3130 Newz(1101, condop, 1, CONDOP);
3131
3132 condop->op_type = OP_COND_EXPR;
22c35a8c 3133 condop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
79072805
LW		 3134 condop->op_first = first;
3135 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 3136 condop->op_true = LINKLIST(trueop);
3137 condop->op_false = LINKLIST(falseop);
c07a80fd 3138 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3139
3140 /* establish postfix order */
3141 condop->op_next = LINKLIST(first);
3142 first->op_next = (OP*)condop;
3143
b1cb66bf 3144 first->op_sibling = trueop;
3145 trueop->op_sibling = falseop;
11343788 3146 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 3147
5dc0d613
MB		 3148 trueop->op_next = o;
3149 falseop->op_next = o;
79072805 3150
11343788 3151 return o;
79072805
LW		 3152}
3153
3154OP *
8ac85365 3155newRANGE(I32 flags, OP *left, OP *right)
79072805 3156{
b35b2403 3157 dTHR;
79072805
LW		 3158 CONDOP *condop;
3159 OP *flip;
3160 OP *flop;
11343788 3161 OP *o;
79072805
LW		 3162
3163 Newz(1101, condop, 1, CONDOP);
3164
3165 condop->op_type = OP_RANGE;
22c35a8c 3166 condop->op_ppaddr = PL_ppaddr[OP_RANGE];
79072805
LW		 3167 condop->op_first = left;
3168 condop->op_flags = OPf_KIDS;
3169 condop->op_true = LINKLIST(left);
3170 condop->op_false = LINKLIST(right);
c07a80fd 3171 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3172
3173 left->op_sibling = right;
3174
3175 condop->op_next = (OP*)condop;
3176 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
3177 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3178 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 3179 linklist(flop);
3180
3181 left->op_next = flip;
3182 right->op_next = flop;
3183
ed6116ce 3184 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 3185 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 3186 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3187 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3188
3189 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3190 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3191
11343788 3192 flip->op_next = o;
79072805 3193 if (!flip->op_private || !flop->op_private)
11343788 3194 linklist(o); /* blow off optimizer unless constant */
79072805 3195
11343788 3196 return o;
79072805
LW		 3197}
3198
3199OP *
8ac85365 3200newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3201{
11343788 3202 dTHR;
463ee0b2 3203 OP* listop;
11343788 3204 OP* o;
463ee0b2 3205 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3206 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3207
463ee0b2
LW		 3208 if (expr) {
3209 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3210 return block; /* do {} while 0 does once */
fb73857a 3211 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3212 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3213 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3214 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3215 } else if (expr->op_flags & OPf_KIDS) {
3216 OP *k1 = ((UNOP*)expr)->op_first;
3217 OP *k2 = (k1) ? k1->op_sibling : NULL;
3218 switch (expr->op_type) {
3219 case OP_NULL:
3220 if (k2 && k2->op_type == OP_READLINE
3221 && (k2->op_flags & OPf_STACKED)
3222 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3223 expr = newUNOP(OP_DEFINED, 0, expr);
3224 break;
3225
3226 case OP_SASSIGN:
3227 if (k1->op_type == OP_READDIR
3228 || k1->op_type == OP_GLOB
3229 || k1->op_type == OP_EACH)
3230 expr = newUNOP(OP_DEFINED, 0, expr);
3231 break;
3232 }
774d564b 3233 }
463ee0b2 3234 }
93a17b20 3235
8990e307 3236 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3237 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3238
883ffac3
CS		 3239 if (listop)
3240 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3241
11343788
MB		 3242 if (once && o != listop)
3243 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3244
11343788
MB		 3245 if (o == listop)
3246 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3247
11343788
MB		 3248 o->op_flags |= flags;
3249 o = scope(o);
3250 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3251 return o;
79072805
LW		 3252}
3253
3254OP *
8ac85365 3255newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3256{
11343788 3257 dTHR;
79072805
LW		 3258 OP *redo;
3259 OP *next = 0;
3260 OP *listop;
11343788 3261 OP *o;
79072805
LW		 3262 OP *condop;
3263
fb73857a 3264 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3265 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3266 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3267 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3268 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3269 OP *k1 = ((UNOP*)expr)->op_first;
3270 OP *k2 = (k1) ? k1->op_sibling : NULL;
3271 switch (expr->op_type) {
3272 case OP_NULL:
3273 if (k2 && k2->op_type == OP_READLINE
3274 && (k2->op_flags & OPf_STACKED)
3275 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3276 expr = newUNOP(OP_DEFINED, 0, expr);
3277 break;
3278
3279 case OP_SASSIGN:
3280 if (k1->op_type == OP_READDIR
3281 || k1->op_type == OP_GLOB
3282 || k1->op_type == OP_EACH)
3283 expr = newUNOP(OP_DEFINED, 0, expr);
3284 break;
3285 }
748a9306 3286 }
79072805
LW		 3287
3288 if (!block)
3289 block = newOP(OP_NULL, 0);
3290
3291 if (cont)
3292 next = LINKLIST(cont);
fb73857a 3293 if (expr) {
79072805 3294 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3295 if ((line_t)whileline != NOLINE) {
3280af22 3296 PL_copline = whileline;
fb73857a 3297 cont = append_elem(OP_LINESEQ, cont,
3298 newSTATEOP(0, Nullch, Nullop));
3299 }
3300 }
79072805 3301
463ee0b2 3302 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3303 redo = LINKLIST(listop);
3304
3305 if (expr) {
3280af22 3306 PL_copline = whileline;
883ffac3
CS		 3307 scalar(listop);
3308 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3309 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3310 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3311 op_free((OP*)loop);
883ffac3 3312 return Nullop; /* listop already freed by new_logop */
463ee0b2 3313 }
883ffac3
CS		 3314 if (listop)
3315 ((LISTOP*)listop)->op_last->op_next = condop =
3316 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3317 if (!next)
3318 next = condop;
3319 }
3320 else
11343788 3321 o = listop;
79072805
LW		 3322
3323 if (!loop) {
3324 Newz(1101,loop,1,LOOP);
3325 loop->op_type = OP_ENTERLOOP;
22c35a8c 3326 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3327 loop->op_private = 0;
3328 loop->op_next = (OP*)loop;
3329 }
3330
11343788 3331 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3332
3333 loop->op_redoop = redo;
11343788 3334 loop->op_lastop = o;
79072805
LW		 3335
3336 if (next)
3337 loop->op_nextop = next;
3338 else
11343788 3339 loop->op_nextop = o;
79072805 3340
11343788
MB		 3341 o->op_flags |= flags;
3342 o->op_private |= (flags >> 8);
3343 return o;
79072805
LW		 3344}
3345
3346OP *
8990e307 3347newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3348{
3349 LOOP *loop;
fb73857a 3350 OP *wop;
85e6fe83 3351 int padoff = 0;
4633a7c4 3352 I32 iterflags = 0;
79072805 3353
79072805 3354 if (sv) {
85e6fe83 3355 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3356 sv->op_type = OP_RV2GV;
22c35a8c 3357 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3358 }
85e6fe83
LW		 3359 else if (sv->op_type == OP_PADSV) { /* private variable */
3360 padoff = sv->op_targ;
3361 op_free(sv);
3362 sv = Nullop;
3363 }
54b9620d
MB		 3364 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3365 padoff = sv->op_targ;
3366 iterflags |= OPf_SPECIAL;
3367 op_free(sv);
3368 sv = Nullop;
3369 }
79072805 3370 else
22c35a8c 3371 croak("Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3372 }
3373 else {
54b9620d
MB		 3374#ifdef USE_THREADS
3375 padoff = find_threadsv("_");
3376 iterflags |= OPf_SPECIAL;
3377#else
3280af22 3378 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3379#endif
79072805 3380 }
5f05dabc 3381 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3382 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3383 iterflags |= OPf_STACKED;
3384 }
89ea2908
GA		 3385 else if (expr->op_type == OP_NULL &&
3386 (expr->op_flags & OPf_KIDS) &&
3387 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3388 {
3389 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3390 * set the STACKED flag to indicate that these values are to be
3391 * treated as min/max values by 'pp_iterinit'.
3392 */
3393 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3394 CONDOP* range = (CONDOP*) flip->op_first;
3395 OP* left = range->op_first;
3396 OP* right = left->op_sibling;
5152d7c7 3397 LISTOP* listop;
89ea2908
GA		 3398
3399 range->op_flags &= ~OPf_KIDS;
3400 range->op_first = Nullop;
3401
5152d7c7
GS		 3402 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3403 listop->op_first->op_next = range->op_true;
89ea2908 3404 left->op_next = range->op_false;
5152d7c7
GS		 3405 right->op_next = (OP*)listop;
3406 listop->op_next = listop->op_first;
89ea2908
GA		 3407
3408 op_free(expr);
5152d7c7 3409 expr = (OP*)(listop);
89ea2908
GA		 3410 null(expr);
3411 iterflags |= OPf_STACKED;
3412 }
3413 else {
3414 expr = mod(force_list(expr), OP_GREPSTART);
3415 }
3416
3417
4633a7c4 3418 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3419 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3420 assert(!loop->op_next);
3421 Renew(loop, 1, LOOP);
3422 loop->op_targ = padoff;
fb73857a 3423 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3424 PL_copline = forline;
fb73857a 3425 return newSTATEOP(0, label, wop);
79072805
LW		 3426}
3427
8990e307 3428OP*
8ac85365 3429newLOOPEX(I32 type, OP *label)
8990e307 3430{
11343788
MB		 3431 dTHR;
3432 OP *o;
8990e307 3433 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3434 /* "last()" means "last" */
3435 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3436 o = newOP(type, OPf_SPECIAL);
3437 else {
3438 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3280af22 3439 ? SvPVx(((SVOP*)label)->op_sv, PL_na)
cdaebead
MB		 3440 : ""));
3441 }
8990e307
LW		 3442 op_free(label);
3443 }
3444 else {
a0d0e21e
LW		 3445 if (label->op_type == OP_ENTERSUB)
3446 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3447 o = newUNOP(type, OPf_STACKED, label);
8990e307 3448 }
3280af22 3449 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3450 return o;
8990e307
LW		 3451}
3452
79072805 3453void
8ac85365 3454cv_undef(CV *cv)
79072805 3455{
11343788
MB		 3456 dTHR;
3457#ifdef USE_THREADS
e858de61
MB		 3458 if (CvMUTEXP(cv)) {
3459 MUTEX_DESTROY(CvMUTEXP(cv));
3460 Safefree(CvMUTEXP(cv));
3461 CvMUTEXP(cv) = 0;
3462 }
11343788
MB		 3463#endif /* USE_THREADS */
3464
a0d0e21e 3465 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3466#ifdef USE_THREADS
3467 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3468 croak("Can't undef active subroutine");
3469#else
a0d0e21e
LW		 3470 if (CvDEPTH(cv))
3471 croak("Can't undef active subroutine");
11343788 3472#endif /* USE_THREADS */
8990e307 3473 ENTER;
a0d0e21e 3474
3280af22
NIS		 3475 SAVESPTR(PL_curpad);
3476 PL_curpad = 0;
a0d0e21e 3477
a5f75d66 3478 if (!CvCLONED(cv))
748a9306 3479 op_free(CvROOT(cv));
79072805 3480 CvROOT(cv) = Nullop;
8990e307 3481 LEAVE;
79072805 3482 }
1d5db326 3483 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3484 CvFLAGS(cv) = 0;
8e07c86e
AD		 3485 SvREFCNT_dec(CvGV(cv));
3486 CvGV(cv) = Nullgv;
3487 SvREFCNT_dec(CvOUTSIDE(cv));
3488 CvOUTSIDE(cv) = Nullcv;
3489 if (CvPADLIST(cv)) {
8ebc5c01 3490 /* may be during global destruction */
3491 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3492 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3493 while (i >= 0) {
3494 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3495 SV* sv = svp ? *svp : Nullsv;
3496 if (!sv)
3497 continue;
3280af22
NIS		 3498 if (sv == (SV*)PL_comppad_name)
3499 PL_comppad_name = Nullav;
3500 else if (sv == (SV*)PL_comppad) {
3501 PL_comppad = Nullav;
3502 PL_curpad = Null(SV**);
46fc3d4c 3503 }
3504 SvREFCNT_dec(sv);
8ebc5c01 3505 }
3506 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3507 }
8e07c86e
AD		 3508 CvPADLIST(cv) = Nullav;
3509 }
79072805
LW		 3510}
3511
5f05dabc 3512#ifdef DEBUG_CLOSURES
76e3520e 3513STATIC void
5f05dabc 3514cv_dump(cv)
3515CV* cv;
3516{
3517 CV *outside = CvOUTSIDE(cv);
3518 AV* padlist = CvPADLIST(cv);
4fdae800 3519 AV* pad_name;
3520 AV* pad;
3521 SV** pname;
3522 SV** ppad;
5f05dabc 3523 I32 ix;
3524
fb73857a 3525 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3526 cv,
3527 (CvANON(cv) ? "ANON"
6b88bc9c 3528 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3529 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3530 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3531 outside,
3532 (!outside ? "null"
3533 : CvANON(outside) ? "ANON"
6b88bc9c 3534 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3535 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3536 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3537
4fdae800 3538 if (!padlist)
3539 return;
3540
3541 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3542 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3543 pname = AvARRAY(pad_name);
3544 ppad = AvARRAY(pad);
3545
93965878 3546 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3547 if (SvPOK(pname[ix]))
fb73857a 3548 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3549 ix, ppad[ix],
3550 SvFAKE(pname[ix]) ? "FAKE " : "",
3551 SvPVX(pname[ix]),
ab50184a
CS		 3552 (long)I_32(SvNVX(pname[ix])),
3553 (long)SvIVX(pname[ix]));
5f05dabc 3554 }
3555}
3556#endif /* DEBUG_CLOSURES */
3557
76e3520e 3558STATIC CV *
8ac85365 3559cv_clone2(CV *proto, CV *outside)
748a9306 3560{
11343788 3561 dTHR;
748a9306
LW		 3562 AV* av;
3563 I32 ix;
3564 AV* protopadlist = CvPADLIST(proto);
3565 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3566 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3567 SV** pname = AvARRAY(protopad_name);
3568 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3569 I32 fname = AvFILLp(protopad_name);
3570 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3571 AV* comppadlist;
3572 CV* cv;
3573
07055b4c
CS		 3574 assert(!CvUNIQUE(proto));
3575
748a9306 3576 ENTER;
3280af22
NIS		 3577 SAVESPTR(PL_curpad);
3578 SAVESPTR(PL_comppad);
3579 SAVESPTR(PL_comppad_name);
3580 SAVESPTR(PL_compcv);
748a9306 3581
3280af22 3582 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3583 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3584 CvCLONED_on(cv);
5f05dabc 3585 if (CvANON(proto))
3586 CvANON_on(cv);
748a9306 3587
11343788 3588#ifdef USE_THREADS
12ca11f6 3589 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3590 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3591 CvOWNER(cv) = 0;
3592#endif /* USE_THREADS */
748a9306 3593 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3594 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3595 CvSTASH(cv) = CvSTASH(proto);
3596 CvROOT(cv) = CvROOT(proto);
3597 CvSTART(cv) = CvSTART(proto);
5f05dabc 3598 if (outside)
3599 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3600
68dc0745 3601 if (SvPOK(proto))
3602 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3603
3280af22 3604 PL_comppad_name = newAV();
46fc3d4c 3605 for (ix = fname; ix >= 0; ix--)
3280af22 3606 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3607
3280af22 3608 PL_comppad = newAV();
748a9306
LW		 3609
3610 comppadlist = newAV();
3611 AvREAL_off(comppadlist);
3280af22
NIS		 3612 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3613 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3614 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3615 av_fill(PL_comppad, AvFILLp(protopad));
3616 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3617
3618 av = newAV(); /* will be @_ */
3619 av_extend(av, 0);
3280af22 3620 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3621 AvFLAGS(av) = AVf_REIFY;
3622
9607fc9c 3623 for (ix = fpad; ix > 0; ix--) {
3624 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3625 if (namesv && namesv != &PL_sv_undef) {
aa689395 3626 char *name = SvPVX(namesv); /* XXX */
3627 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3628 I32 off = pad_findlex(name, ix, SvIVX(namesv),
155fc61f 3629 CvOUTSIDE(cv), cxstack_ix, 0);
5f05dabc 3630 if (!off)
3280af22 3631 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3632 else if (off != ix)
748a9306
LW		 3633 croak("panic: cv_clone: %s", name);
3634 }
3635 else { /* our own lexical */
aa689395 3636 SV* sv;
5f05dabc 3637 if (*name == '&') {
3638 /* anon code -- we'll come back for it */
3639 sv = SvREFCNT_inc(ppad[ix]);
3640 }
3641 else if (*name == '@')
3642 sv = (SV*)newAV();
748a9306 3643 else if (*name == '%')
5f05dabc 3644 sv = (SV*)newHV();
748a9306 3645 else
5f05dabc 3646 sv = NEWSV(0,0);
3647 if (!SvPADBUSY(sv))
3648 SvPADMY_on(sv);
3280af22 3649 PL_curpad[ix] = sv;
748a9306
LW		 3650 }
3651 }
3652 else {
aa689395 3653 SV* sv = NEWSV(0,0);
748a9306 3654 SvPADTMP_on(sv);
3280af22 3655 PL_curpad[ix] = sv;
748a9306
LW		 3656 }
3657 }
3658
5f05dabc 3659 /* Now that vars are all in place, clone nested closures. */
3660
9607fc9c 3661 for (ix = fpad; ix > 0; ix--) {
3662 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3663 if (namesv
3280af22 3664 && namesv != &PL_sv_undef
aa689395 3665 && !(SvFLAGS(namesv) & SVf_FAKE)
3666 && *SvPVX(namesv) == '&'
5f05dabc 3667 && CvCLONE(ppad[ix]))
3668 {
3669 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3670 SvREFCNT_dec(ppad[ix]);
3671 CvCLONE_on(kid);
3672 SvPADMY_on(kid);
3280af22 3673 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3674 }
3675 }
3676
5f05dabc 3677#ifdef DEBUG_CLOSURES
ab50184a
CS		 3678 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3679 cv_dump(outside);
3680 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3681 cv_dump(proto);
ab50184a 3682 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3683 cv_dump(cv);
3684#endif
3685
748a9306
LW		 3686 LEAVE;
3687 return cv;
3688}
3689
3690CV *
8ac85365 3691cv_clone(CV *proto)
5f05dabc 3692{
3693 return cv_clone2(proto, CvOUTSIDE(proto));
3694}
3695
3fe9a6f1 3696void
8ac85365 3697cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3698{
3699 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3700 SV* msg = sv_newmortal();
3fe9a6f1 3701 SV* name = Nullsv;
3702
3703 if (gv)
46fc3d4c 3704 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3705 sv_setpv(msg, "Prototype mismatch:");
3706 if (name)
fc36a67e 3707 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3708 if (SvPOK(cv))
46fc3d4c 3709 sv_catpvf(msg, " (%s)", SvPVX(cv));
3710 sv_catpv(msg, " vs ");
3711 if (p)
3712 sv_catpvf(msg, "(%s)", p);
3713 else
3714 sv_catpv(msg, "none");
fc36a67e 3715 warn("%_", msg);
3fe9a6f1 3716 }
3717}
3718
760ac839 3719SV *
8ac85365 3720cv_const_sv(CV *cv)
760ac839 3721{
54310121 3722 if (!cv || !SvPOK(cv) || SvCUR(cv))
3723 return Nullsv;
fe5e78ed
GS		 3724 return op_const_sv(CvSTART(cv), cv);
3725}
760ac839 3726
fe5e78ed
GS		 3727SV *
3728op_const_sv(OP *o, CV *cv)
3729{
3730 SV *sv = Nullsv;
3731
3732 if(!o)
3733 return Nullsv;
3734
3735 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3736 o = cLISTOPo->op_first->op_sibling;
3737
3738 for (; o; o = o->op_next) {
54310121 3739 OPCODE type = o->op_type;
fe5e78ed
GS		 3740
3741 if(sv && o->op_next == o)
3742 return sv;
54310121 3743 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3744 continue;
3745 if (type == OP_LEAVESUB || type == OP_RETURN)
3746 break;
3747 if (sv)
3748 return Nullsv;
3749 if (type == OP_CONST)
5dc0d613 3750 sv = cSVOPo->op_sv;
fe5e78ed 3751 else if (type == OP_PADSV && cv) {
e858de61
MB		 3752 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3753 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3754 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3755 return Nullsv;
760ac839 3756 }
54310121 3757 else
3758 return Nullsv;
760ac839 3759 }
5aabfad6 3760 if (sv)
3761 SvREADONLY_on(sv);
760ac839
LW		 3762 return sv;
3763}
3764
748a9306 3765CV *
8ac85365 3766newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3767{
11343788 3768 dTHR;
3280af22 3769 char *name = o ? SvPVx(cSVOPo->op_sv, PL_na) : Nullch;
55d729e4
GS		 3770 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3771 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
3280af22 3772 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, PL_na) : Nullch;
a2008d6d 3773 register CV *cv=0;
a0d0e21e 3774 I32 ix;
79072805 3775
11343788 3776 if (o)
5dc0d613 3777 SAVEFREEOP(o);
3fe9a6f1 3778 if (proto)
3779 SAVEFREEOP(proto);
3780
55d729e4
GS		 3781 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3782 maximum a prototype before. */
3783 if (SvTYPE(gv) > SVt_NULL) {
3784 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1))
3785 warn("Runaway prototype");
3786 cv_ckproto((CV*)gv, NULL, ps);
3787 }
3788 if (ps)
3789 sv_setpv((SV*)gv, ps);
3790 else
3791 sv_setiv((SV*)gv, -1);
3280af22
NIS		 3792 SvREFCNT_dec(PL_compcv);
3793 cv = PL_compcv = NULL;
3794 PL_sub_generation++;
55d729e4
GS		 3795 goto noblock;
3796 }
3797
68dc0745 3798 if (!name || GvCVGEN(gv))
3799 cv = Nullcv;
3800 else if (cv = GvCV(gv)) {
3fe9a6f1 3801 cv_ckproto(cv, gv, ps);
68dc0745 3802 /* already defined (or promised)? */
3803 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3804 SV* const_sv;
fe5e78ed 3805 bool const_changed = TRUE;
aa689395 3806 if (!block) {
3807 /* just a "sub foo;" when &foo is already defined */
3280af22 3808 SAVEFREESV(PL_compcv);
aa689395 3809 goto done;
3810 }
7bac28a0 3811 /* ahem, death to those who redefine active sort subs */
3280af22 3812 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
7bac28a0 3813 croak("Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3814 if(const_sv = cv_const_sv(cv))
3815 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 3816 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
3817 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3818 && HvNAME(GvSTASH(CvGV(cv)))
3819 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3820 "autouse"))) {
3280af22
NIS		 3821 line_t oldline = PL_curcop->cop_line;
3822 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3823 warner(WARN_REDEFINE,
3824 const_sv ? "Constant subroutine %s redefined"
3825 : "Subroutine %s redefined", name);
3280af22 3826 PL_curcop->cop_line = oldline;
79072805 3827 }
8990e307 3828 SvREFCNT_dec(cv);
68dc0745 3829 cv = Nullcv;
79072805
LW		 3830 }
3831 }
a0d0e21e 3832 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3833 cv_undef(cv);
3280af22
NIS		 3834 CvFLAGS(cv) = CvFLAGS(PL_compcv);
3835 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
3836 CvOUTSIDE(PL_compcv) = 0;
3837 CvPADLIST(cv) = CvPADLIST(PL_compcv);
3838 CvPADLIST(PL_compcv) = 0;
3839 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
3840 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
3841 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 3842 }
3843 else {
3280af22 3844 cv = PL_compcv;
44a8e56a 3845 if (name) {
3846 GvCV(gv) = cv;
3847 GvCVGEN(gv) = 0;
3280af22 3848 PL_sub_generation++;
44a8e56a 3849 }
a0d0e21e 3850 }
44a8e56a 3851 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 3852 CvFILEGV(cv) = PL_curcop->cop_filegv;
3853 CvSTASH(cv) = PL_curstash;
11343788
MB		 3854#ifdef USE_THREADS
3855 CvOWNER(cv) = 0;
1cfa4ec7 3856 if (!CvMUTEXP(cv)) {
f6aaf501 3857 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 3858 MUTEX_INIT(CvMUTEXP(cv));
3859 }
11343788 3860#endif /* USE_THREADS */
8990e307 3861
3fe9a6f1 3862 if (ps)
3863 sv_setpv((SV*)cv, ps);
4633a7c4 3864
3280af22 3865 if (PL_error_count) {
c07a80fd 3866 op_free(block);
3867 block = Nullop;
68dc0745 3868 if (name) {
3869 char *s = strrchr(name, ':');
3870 s = s ? s+1 : name;
6d4c2119
CS		 3871 if (strEQ(s, "BEGIN")) {
3872 char *not_safe =
3873 "BEGIN not safe after errors--compilation aborted";
3280af22 3874 if (PL_in_eval & 4)
6d4c2119
CS		 3875 croak(not_safe);
3876 else {
3877 /* force display of errors found but not reported */
38a03e6e 3878 sv_catpv(ERRSV, not_safe);
3280af22 3879 croak("%s", SvPVx(ERRSV, PL_na));
6d4c2119
CS		 3880 }
3881 }
68dc0745 3882 }
c07a80fd 3883 }
a0d0e21e 3884 if (!block) {
55d729e4 3885 noblock:
3280af22 3886 PL_copline = NOLINE;
a0d0e21e
LW		 3887 LEAVE_SCOPE(floor);
3888 return cv;
3889 }
3890
3280af22
NIS		 3891 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
3892 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 3893
54310121 3894 if (CvCLONE(cv)) {
3280af22
NIS		 3895 SV **namep = AvARRAY(PL_comppad_name);
3896 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 3897 SV *namesv;
3898
3280af22 3899 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3900 continue;
3901 /*
3902 * The only things that a clonable function needs in its
3903 * pad are references to outer lexicals and anonymous subs.
3904 * The rest are created anew during cloning.
3905 */
3906 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 3907 namesv != &PL_sv_undef &&
54310121 3908 (SvFAKE(namesv) ||
3909 *SvPVX(namesv) == '&')))
3910 {
3280af22
NIS		 3911 SvREFCNT_dec(PL_curpad[ix]);
3912 PL_curpad[ix] = Nullsv;
54310121 3913 }
3914 }
a0d0e21e 3915 }
54310121 3916 else {
3917 AV *av = newAV(); /* Will be @_ */
3918 av_extend(av, 0);
3280af22 3919 av_store(PL_comppad, 0, (SV*)av);
54310121 3920 AvFLAGS(av) = AVf_REIFY;
79072805 3921
3280af22
NIS		 3922 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
3923 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3924 continue;
3280af22
NIS		 3925 if (!SvPADMY(PL_curpad[ix]))
3926 SvPADTMP_on(PL_curpad[ix]);
54310121 3927 }
3928 }
79072805 3929
a0d0e21e 3930 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3931 CvSTART(cv) = LINKLIST(CvROOT(cv));
3932 CvROOT(cv)->op_next = 0;
3933 peep(CvSTART(cv));
93a17b20 3934
44a8e56a 3935 if (name) {
3936 char *s;
3937
3280af22 3938 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 3939 SV *sv = NEWSV(0,0);
44a8e56a 3940 SV *tmpstr = sv_newmortal();
549bb64a 3941 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3942 CV *cv;
3943 HV *hv;
3944
51790459 3945 sv_setpvf(sv, "%_:%ld-%ld",
3280af22
NIS		 3946 GvSV(PL_curcop->cop_filegv),
3947 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 3948 gv_efullname3(tmpstr, gv, Nullch);
3280af22 3949 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3950 hv = GvHVn(db_postponed);
9607fc9c 3951 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3952 && (cv = GvCV(db_postponed))) {
44a8e56a 3953 dSP;
924508f0 3954 PUSHMARK(SP);
44a8e56a 3955 XPUSHs(tmpstr);
3956 PUTBACK;
3957 perl_call_sv((SV*)cv, G_DISCARD);
3958 }
3959 }
79072805 3960
44a8e56a 3961 if ((s = strrchr(name,':')))
28757baa 3962 s++;
3963 else
3964 s = name;
68dc0745 3965 if (strEQ(s, "BEGIN")) {
3280af22 3966 I32 oldscope = PL_scopestack_ix;
28757baa 3967 ENTER;
3280af22
NIS		 3968 SAVESPTR(PL_compiling.cop_filegv);
3969 SAVEI16(PL_compiling.cop_line);
3970 save_svref(&PL_rs);
3971 sv_setsv(PL_rs, PL_nrs);
28757baa 3972
3280af22
NIS		 3973 if (!PL_beginav)
3974 PL_beginav = newAV();
28757baa 3975 DEBUG_x( dump_sub(gv) );
3280af22 3976 av_push(PL_beginav, (SV *)cv);
28757baa 3977 GvCV(gv) = 0;
3280af22 3978 call_list(oldscope, PL_beginav);
a6006777 3979
3280af22 3980 PL_curcop = &PL_compiling;
a0ed51b3 3981 PL_compiling.op_private = PL_hints;
28757baa 3982 LEAVE;
3983 }
3280af22
NIS		 3984 else if (strEQ(s, "END") && !PL_error_count) {
3985 if (!PL_endav)
3986 PL_endav = newAV();
3987 av_unshift(PL_endav, 1);
3988 av_store(PL_endav, 0, (SV *)cv);
28757baa 3989 GvCV(gv) = 0;
3990 }
3280af22
NIS		 3991 else if (strEQ(s, "INIT") && !PL_error_count) {
3992 if (!PL_initav)
3993 PL_initav = newAV();
3994 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 3995 GvCV(gv) = 0;
ae77835f 3996 }
79072805 3997 }
a6006777 3998
aa689395 3999 done:
3280af22 4000 PL_copline = NOLINE;
8990e307 4001 LEAVE_SCOPE(floor);
a0d0e21e 4002 return cv;
79072805
LW		 4003}
4004
5476c433
JD		 4005void
4006newCONSTSUB(HV *stash, char *name, SV *sv)
4007{
4008 dTHR;
3280af22
NIS		 4009 U32 oldhints = PL_hints;
4010 HV *old_cop_stash = PL_curcop->cop_stash;
4011 HV *old_curstash = PL_curstash;
4012 line_t oldline = PL_curcop->cop_line;
4013 PL_curcop->cop_line = PL_copline;
5476c433 4014
3280af22 4015 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4016 if(stash)
3280af22 4017 PL_curstash = PL_curcop->cop_stash = stash;
5476c433
JD		 4018
4019 newSUB(
be24f278 4020 start_subparse(FALSE, 0),
5476c433 4021 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4022 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
5476c433
JD		 4023 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4024 );
4025
3280af22
NIS		 4026 PL_hints = oldhints;
4027 PL_curcop->cop_stash = old_cop_stash;
4028 PL_curstash = old_curstash;
4029 PL_curcop->cop_line = oldline;
5476c433
JD		 4030}
4031
57d3b86d 4032CV *
e3b8966e 4033newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename)
a0d0e21e 4034{
11343788 4035 dTHR;
44a8e56a 4036 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4037 register CV *cv;
44a8e56a 4038
4039 if (cv = (name ? GvCV(gv) : Nullcv)) {
4040 if (GvCVGEN(gv)) {
4041 /* just a cached method */
4042 SvREFCNT_dec(cv);
4043 cv = 0;
4044 }
4045 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4046 /* already defined (or promised) */
599cee73 4047 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4048 && HvNAME(GvSTASH(CvGV(cv)))
4049 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4050 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4051 if (PL_copline != NOLINE)
4052 PL_curcop->cop_line = PL_copline;
599cee73 4053 warner(WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4054 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4055 }
4056 SvREFCNT_dec(cv);
4057 cv = 0;
79072805 4058 }
79072805 4059 }
44a8e56a 4060
4061 if (cv) /* must reuse cv if autoloaded */
4062 cv_undef(cv);
a0d0e21e
LW		 4063 else {
4064 cv = (CV*)NEWSV(1105,0);
4065 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4066 if (name) {
4067 GvCV(gv) = cv;
4068 GvCVGEN(gv) = 0;
3280af22 4069 PL_sub_generation++;
44a8e56a 4070 }
a0d0e21e 4071 }
5196be3e 4072 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4073#ifdef USE_THREADS
12ca11f6 4074 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4075 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4076 CvOWNER(cv) = 0;
4077#endif /* USE_THREADS */
79072805 4078 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4079 CvXSUB(cv) = subaddr;
44a8e56a 4080
28757baa 4081 if (name) {
4082 char *s = strrchr(name,':');
4083 if (s)
4084 s++;
4085 else
4086 s = name;
4087 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4088 if (!PL_beginav)
4089 PL_beginav = newAV();
4090 av_push(PL_beginav, (SV *)cv);
44a8e56a 4091 GvCV(gv) = 0;
28757baa 4092 }
4093 else if (strEQ(s, "END")) {
3280af22
NIS		 4094 if (!PL_endav)
4095 PL_endav = newAV();
4096 av_unshift(PL_endav, 1);
4097 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4098 GvCV(gv) = 0;
28757baa 4099 }
7d07dbc2 4100 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4101 if (!PL_initav)
4102 PL_initav = newAV();
4103 av_push(PL_initav, (SV *)cv);
f8f842e4 4104 GvCV(gv) = 0;
ae77835f 4105 }
28757baa 4106 }
8990e307 4107 else
a5f75d66 4108 CvANON_on(cv);
44a8e56a 4109
a0d0e21e 4110 return cv;
79072805
LW		 4111}
4112
4113void
8ac85365 4114newFORM(I32 floor, OP *o, OP *block)
79072805 4115{
11343788 4116 dTHR;
79072805
LW		 4117 register CV *cv;
4118 char *name;
4119 GV *gv;
a0d0e21e 4120 I32 ix;
79072805 4121
11343788 4122 if (o)
3280af22 4123 name = SvPVx(cSVOPo->op_sv, PL_na);
79072805
LW		 4124 else
4125 name = "STDOUT";
85e6fe83 4126 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4127 GvMULTI_on(gv);
79072805 4128 if (cv = GvFORM(gv)) {
599cee73 4129 if (ckWARN(WARN_REDEFINE)) {
3280af22 4130 line_t oldline = PL_curcop->cop_line;
79072805 4131
3280af22 4132 PL_curcop->cop_line = PL_copline;
599cee73 4133 warner(WARN_REDEFINE, "Format %s redefined",name);
3280af22 4134 PL_curcop->cop_line = oldline;
79072805 4135 }
8990e307 4136 SvREFCNT_dec(cv);
79072805 4137 }
3280af22 4138 cv = PL_compcv;
79072805 4139 GvFORM(gv) = cv;
44a8e56a 4140 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4141 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4142
3280af22
NIS		 4143 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4144 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4145 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4146 }
4147
79072805
LW		 4148 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4149 CvSTART(cv) = LINKLIST(CvROOT(cv));
4150 CvROOT(cv)->op_next = 0;
4151 peep(CvSTART(cv));
11343788 4152 op_free(o);
3280af22 4153 PL_copline = NOLINE;
8990e307 4154 LEAVE_SCOPE(floor);
79072805
LW		 4155}
4156
4157OP *
8ac85365 4158newANONLIST(OP *o)
79072805 4159{
93a17b20 4160 return newUNOP(OP_REFGEN, 0,
11343788 4161 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4162}
4163
4164OP *
8ac85365 4165newANONHASH(OP *o)
79072805 4166{
93a17b20 4167 return newUNOP(OP_REFGEN, 0,
11343788 4168 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4169}
4170
4171OP *
8ac85365 4172newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 4173{
4174 return newUNOP(OP_REFGEN, 0,
4633a7c4 4175 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 4176}
4177
4178OP *
8ac85365 4179oopsAV(OP *o)
79072805 4180{
ed6116ce
LW		 4181 switch (o->op_type) {
4182 case OP_PADSV:
4183 o->op_type = OP_PADAV;
22c35a8c 4184 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4185 return ref(o, OP_RV2AV);
ed6116ce
LW		 4186
4187 case OP_RV2SV:
79072805 4188 o->op_type = OP_RV2AV;
22c35a8c 4189 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4190 ref(o, OP_RV2AV);
ed6116ce
LW		 4191 break;
4192
4193 default:
79072805 4194 warn("oops: oopsAV");
ed6116ce
LW		 4195 break;
4196 }
79072805
LW		 4197 return o;
4198}
4199
4200OP *
8ac85365 4201oopsHV(OP *o)
79072805 4202{
ed6116ce
LW		 4203 switch (o->op_type) {
4204 case OP_PADSV:
4205 case OP_PADAV:
4206 o->op_type = OP_PADHV;
22c35a8c 4207 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4208 return ref(o, OP_RV2HV);
ed6116ce
LW		 4209
4210 case OP_RV2SV:
4211 case OP_RV2AV:
79072805 4212 o->op_type = OP_RV2HV;
22c35a8c 4213 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4214 ref(o, OP_RV2HV);
ed6116ce
LW		 4215 break;
4216
4217 default:
79072805 4218 warn("oops: oopsHV");
ed6116ce
LW		 4219 break;
4220 }
79072805
LW		 4221 return o;
4222}
4223
4224OP *
8ac85365 4225newAVREF(OP *o)
79072805 4226{
ed6116ce
LW		 4227 if (o->op_type == OP_PADANY) {
4228 o->op_type = OP_PADAV;
22c35a8c 4229 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4230 return o;
ed6116ce 4231 }
79072805
LW		 4232 return newUNOP(OP_RV2AV, 0, scalar(o));
4233}
4234
4235OP *
8ac85365 4236newGVREF(I32 type, OP *o)
79072805 4237{
a0d0e21e
LW		 4238 if (type == OP_MAPSTART)
4239 return newUNOP(OP_NULL, 0, o);
748a9306 4240 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4241}
4242
4243OP *
8ac85365 4244newHVREF(OP *o)
79072805 4245{
ed6116ce
LW		 4246 if (o->op_type == OP_PADANY) {
4247 o->op_type = OP_PADHV;
22c35a8c 4248 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4249 return o;
ed6116ce 4250 }
79072805
LW		 4251 return newUNOP(OP_RV2HV, 0, scalar(o));
4252}
4253
4254OP *
8ac85365 4255oopsCV(OP *o)
79072805 4256{
463ee0b2 4257 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 4258 /* STUB */
4259 return o;
4260}
4261
4262OP *
8ac85365 4263newCVREF(I32 flags, OP *o)
79072805 4264{
c07a80fd 4265 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4266}
4267
4268OP *
8ac85365 4269newSVREF(OP *o)
79072805 4270{
ed6116ce
LW		 4271 if (o->op_type == OP_PADANY) {
4272 o->op_type = OP_PADSV;
22c35a8c 4273 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4274 return o;
ed6116ce 4275 }
224a4551
MB		 4276 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4277 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4278 return o;
224a4551 4279 }
79072805
LW		 4280 return newUNOP(OP_RV2SV, 0, scalar(o));
4281}
4282
4283/* Check routines. */
4284
4285OP *
8ac85365 4286ck_anoncode(OP *o)
5f05dabc 4287{
178c6305
CS		 4288 PADOFFSET ix;
4289 SV* name;
4290
4291 name = NEWSV(1106,0);
4292 sv_upgrade(name, SVt_PVNV);
4293 sv_setpvn(name, "&", 1);
4294 SvIVX(name) = -1;
4295 SvNVX(name) = 1;
5dc0d613 4296 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4297 av_store(PL_comppad_name, ix, name);
4298 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4299 SvPADMY_on(cSVOPo->op_sv);
4300 cSVOPo->op_sv = Nullsv;
4301 cSVOPo->op_targ = ix;
4302 return o;
5f05dabc 4303}
4304
4305OP *
8ac85365 4306ck_bitop(OP *o)
55497cff 4307{
3280af22 4308 o->op_private = PL_hints;
5dc0d613 4309 return o;
55497cff 4310}
4311
4312OP *
8ac85365 4313ck_concat(OP *o)
79072805 4314{
11343788
MB		 4315 if (cUNOPo->op_first->op_type == OP_CONCAT)
4316 o->op_flags |= OPf_STACKED;
4317 return o;
79072805
LW		 4318}
4319
4320OP *
8ac85365 4321ck_spair(OP *o)
79072805 4322{
11343788 4323 if (o->op_flags & OPf_KIDS) {
79072805 4324 OP* newop;
a0d0e21e 4325 OP* kid;
5dc0d613
MB		 4326 OPCODE type = o->op_type;
4327 o = modkids(ck_fun(o), type);
11343788 4328 kid = cUNOPo->op_first;
a0d0e21e
LW		 4329 newop = kUNOP->op_first->op_sibling;
4330 if (newop &&
4331 (newop->op_sibling ||
22c35a8c 4332 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4333 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4334 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4335
11343788 4336 return o;
a0d0e21e
LW		 4337 }
4338 op_free(kUNOP->op_first);
4339 kUNOP->op_first = newop;
4340 }
22c35a8c 4341 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4342 return ck_fun(o);
a0d0e21e
LW		 4343}
4344
4345OP *
8ac85365 4346ck_delete(OP *o)
a0d0e21e 4347{
11343788 4348 o = ck_fun(o);
5dc0d613 4349 o->op_private = 0;
11343788
MB		 4350 if (o->op_flags & OPf_KIDS) {
4351 OP *kid = cUNOPo->op_first;
5f05dabc 4352 if (kid->op_type == OP_HSLICE)
5dc0d613 4353 o->op_private |= OPpSLICE;
5f05dabc 4354 else if (kid->op_type != OP_HELEM)
4355 croak("%s argument is not a HASH element or slice",
22c35a8c 4356 PL_op_desc[o->op_type]);
a0d0e21e 4357 null(kid);
79072805 4358 }
11343788 4359 return o;
79072805
LW		 4360}
4361
4362OP *
8ac85365 4363ck_eof(OP *o)
79072805 4364{
11343788 4365 I32 type = o->op_type;
79072805 4366
11343788
MB		 4367 if (o->op_flags & OPf_KIDS) {
4368 if (cLISTOPo->op_first->op_type == OP_STUB) {
4369 op_free(o);
4370 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4371 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4372 }
11343788 4373 return ck_fun(o);
79072805 4374 }
11343788 4375 return o;
79072805
LW		 4376}
4377
4378OP *
8ac85365 4379ck_eval(OP *o)
79072805 4380{
3280af22 4381 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4382 if (o->op_flags & OPf_KIDS) {
4383 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4384
93a17b20 4385 if (!kid) {
11343788
MB		 4386 o->op_flags &= ~OPf_KIDS;
4387 null(o);
79072805
LW		 4388 }
4389 else if (kid->op_type == OP_LINESEQ) {
4390 LOGOP *enter;
4391
11343788
MB		 4392 kid->op_next = o->op_next;
4393 cUNOPo->op_first = 0;
4394 op_free(o);
79072805
LW		 4395
4396 Newz(1101, enter, 1, LOGOP);
4397 enter->op_type = OP_ENTERTRY;
22c35a8c 4398 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4399 enter->op_private = 0;
4400
4401 /* establish postfix order */
4402 enter->op_next = (OP*)enter;
4403
11343788
MB		 4404 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4405 o->op_type = OP_LEAVETRY;
22c35a8c 4406 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4407 enter->op_other = o;
4408 return o;
79072805 4409 }
c7cc6f1c 4410 else
473986ff 4411 scalar((OP*)kid);
79072805
LW		 4412 }
4413 else {
11343788 4414 op_free(o);
54b9620d 4415 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4416 }
3280af22 4417 o->op_targ = (PADOFFSET)PL_hints;
11343788 4418 return o;
79072805
LW		 4419}
4420
4421OP *
8ac85365 4422ck_exec(OP *o)
79072805
LW		 4423{
4424 OP *kid;
11343788
MB		 4425 if (o->op_flags & OPf_STACKED) {
4426 o = ck_fun(o);
4427 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4428 if (kid->op_type == OP_RV2GV)
4429 null(kid);
79072805 4430 }
463ee0b2 4431 else
11343788
MB		 4432 o = listkids(o);
4433 return o;
79072805
LW		 4434}
4435
4436OP *
8ac85365 4437ck_exists(OP *o)
5f05dabc 4438{
5196be3e
MB		 4439 o = ck_fun(o);
4440 if (o->op_flags & OPf_KIDS) {
4441 OP *kid = cUNOPo->op_first;
5f05dabc 4442 if (kid->op_type != OP_HELEM)
22c35a8c 4443 croak("%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4444 null(kid);
4445 }
5196be3e 4446 return o;
5f05dabc 4447}
4448
22c35a8c 4449#if 0
5f05dabc 4450OP *
8ac85365 4451ck_gvconst(register OP *o)
79072805
LW		 4452{
4453 o = fold_constants(o);
4454 if (o->op_type == OP_CONST)
4455 o->op_type = OP_GV;
4456 return o;
4457}
22c35a8c 4458#endif
79072805
LW		 4459
4460OP *
8ac85365 4461ck_rvconst(register OP *o)
79072805 4462{
11343788
MB		 4463 dTHR;
4464 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4465
3280af22 4466 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4467 if (kid->op_type == OP_CONST) {
44a8e56a 4468 char *name;
4469 int iscv;
4470 GV *gv;
779c5bc9 4471 SV *kidsv = kid->op_sv;
44a8e56a 4472
779c5bc9
GS		 4473 /* Is it a constant from cv_const_sv()? */
4474 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4475 SV *rsv = SvRV(kidsv);
4476 int svtype = SvTYPE(rsv);
4477 char *badtype = Nullch;
4478
4479 switch (o->op_type) {
4480 case OP_RV2SV:
4481 if (svtype > SVt_PVMG)
4482 badtype = "a SCALAR";
4483 break;
4484 case OP_RV2AV:
4485 if (svtype != SVt_PVAV)
4486 badtype = "an ARRAY";
4487 break;
4488 case OP_RV2HV:
4489 if (svtype != SVt_PVHV) {
4490 if (svtype == SVt_PVAV) { /* pseudohash? */
4491 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4492 if (ksv && SvROK(*ksv)
4493 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4494 {
4495 break;
4496 }
4497 }
4498 badtype = "a HASH";
4499 }
4500 break;
4501 case OP_RV2CV:
4502 if (svtype != SVt_PVCV)
4503 badtype = "a CODE";
4504 break;
4505 }
4506 if (badtype)
4507 croak("Constant is not %s reference", badtype);
4508 return o;
4509 }
4510 name = SvPV(kidsv, PL_na);
3280af22 4511 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4512 char *badthing = Nullch;
5dc0d613 4513 switch (o->op_type) {
44a8e56a 4514 case OP_RV2SV:
4515 badthing = "a SCALAR";
4516 break;
4517 case OP_RV2AV:
4518 badthing = "an ARRAY";
4519 break;
4520 case OP_RV2HV:
4521 badthing = "a HASH";
4522 break;
4523 }
4524 if (badthing)
4525 croak(
4526 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4527 name, badthing);
4528 }
93233ece
CS		 4529 /*
4530 * This is a little tricky. We only want to add the symbol if we
4531 * didn't add it in the lexer. Otherwise we get duplicate strict
4532 * warnings. But if we didn't add it in the lexer, we must at
4533 * least pretend like we wanted to add it even if it existed before,
4534 * or we get possible typo warnings. OPpCONST_ENTERED says
4535 * whether the lexer already added THIS instance of this symbol.
4536 */
5196be3e 4537 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4538 do {
44a8e56a 4539 gv = gv_fetchpv(name,
748a9306 4540 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4541 iscv
4542 ? SVt_PVCV
11343788 4543 : o->op_type == OP_RV2SV
a0d0e21e 4544 ? SVt_PV
11343788 4545 : o->op_type == OP_RV2AV
a0d0e21e 4546 ? SVt_PVAV
11343788 4547 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4548 ? SVt_PVHV
4549 : SVt_PVGV);
93233ece
CS		 4550 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4551 if (gv) {
4552 kid->op_type = OP_GV;
4553 SvREFCNT_dec(kid->op_sv);
4554 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4555 }
79072805 4556 }
11343788 4557 return o;
79072805
LW		 4558}
4559
4560OP *
8ac85365 4561ck_ftst(OP *o)
79072805 4562{
11343788
MB		 4563 dTHR;
4564 I32 type = o->op_type;
79072805 4565
11343788
MB		 4566 if (o->op_flags & OPf_REF)
4567 return o;
79072805 4568
108ed793 4569 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4570 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4571
4572 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4573 OP *newop = newGVOP(type, OPf_REF,
3280af22 4574 gv_fetchpv(SvPVx(kid->op_sv, PL_na), TRUE, SVt_PVIO));
11343788 4575 op_free(o);
79072805
LW		 4576 return newop;
4577 }
4578 }
4579 else {
11343788 4580 op_free(o);
79072805 4581 if (type == OP_FTTTY)
fb73857a 4582 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4583 SVt_PVIO));
79072805 4584 else
54b9620d 4585 return newUNOP(type, 0, newDEFSVOP());
79072805 4586 }
11343788 4587 return o;
79072805
LW		 4588}
4589
4590OP *
8ac85365 4591ck_fun(OP *o)
79072805 4592{
11343788 4593 dTHR;
79072805
LW		 4594 register OP *kid;
4595 OP **tokid;
4596 OP *sibl;
4597 I32 numargs = 0;
11343788 4598 int type = o->op_type;
22c35a8c 4599 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 4600
11343788 4601 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4602 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4603 oa &= ~OA_OPTIONAL;
4604 else
11343788 4605 return no_fh_allowed(o);
79072805
LW		 4606 }
4607
11343788
MB		 4608 if (o->op_flags & OPf_KIDS) {
4609 tokid = &cLISTOPo->op_first;
4610 kid = cLISTOPo->op_first;
8990e307
LW		 4611 if (kid->op_type == OP_PUSHMARK ||
4612 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4613 {
79072805
LW		 4614 tokid = &kid->op_sibling;
4615 kid = kid->op_sibling;
4616 }
22c35a8c 4617 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 4618 *tokid = kid = newDEFSVOP();
79072805
LW		 4619
4620 while (oa && kid) {
4621 numargs++;
4622 sibl = kid->op_sibling;
4623 switch (oa & 7) {
4624 case OA_SCALAR:
4625 scalar(kid);
4626 break;
4627 case OA_LIST:
4628 if (oa < 16) {
4629 kid = 0;
4630 continue;
4631 }
4632 else
4633 list(kid);
4634 break;
4635 case OA_AVREF:
4636 if (kid->op_type == OP_CONST &&
4637 (kid->op_private & OPpCONST_BARE)) {
3280af22 4638 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4639 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4640 gv_fetchpv(name, TRUE, SVt_PVAV) ));
599cee73
PM		 4641 if (ckWARN(WARN_SYNTAX))
4642 warner(WARN_SYNTAX,
4643 "Array @%s missing the @ in argument %ld of %s()",
22c35a8c 4644 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4645 op_free(kid);
4646 kid = newop;
4647 kid->op_sibling = sibl;
4648 *tokid = kid;
4649 }
8990e307 4650 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
22c35a8c 4651 bad_type(numargs, "array", PL_op_desc[o->op_type], kid);
a0d0e21e 4652 mod(kid, type);
79072805
LW		 4653 break;
4654 case OA_HVREF:
4655 if (kid->op_type == OP_CONST &&
4656 (kid->op_private & OPpCONST_BARE)) {
3280af22 4657 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4658 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4659 gv_fetchpv(name, TRUE, SVt_PVHV) ));
599cee73
PM		 4660 if (ckWARN(WARN_SYNTAX))
4661 warner(WARN_SYNTAX,
4662 "Hash %%%s missing the %% in argument %ld of %s()",
22c35a8c 4663 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4664 op_free(kid);
4665 kid = newop;
4666 kid->op_sibling = sibl;
4667 *tokid = kid;
4668 }
8990e307 4669 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
22c35a8c 4670 bad_type(numargs, "hash", PL_op_desc[o->op_type], kid);
a0d0e21e 4671 mod(kid, type);
79072805
LW		 4672 break;
4673 case OA_CVREF:
4674 {
a0d0e21e 4675 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4676 kid->op_sibling = 0;
4677 linklist(kid);
4678 newop->op_next = newop;
4679 kid = newop;
4680 kid->op_sibling = sibl;
4681 *tokid = kid;
4682 }
4683 break;
4684 case OA_FILEREF:
c340be78 4685 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805
LW		 4686 if (kid->op_type == OP_CONST &&
4687 (kid->op_private & OPpCONST_BARE)) {
4688 OP *newop = newGVOP(OP_GV, 0,
3280af22 4689 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, PL_na), TRUE,
85e6fe83 4690 SVt_PVIO) );
79072805
LW		 4691 op_free(kid);
4692 kid = newop;
4693 }
1ea32a52
GS		 4694 else if (kid->op_type == OP_READLINE) {
4695 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
4696 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
4697 }
79072805
LW		 4698 else {
4699 kid->op_sibling = 0;
4700 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4701 }
4702 kid->op_sibling = sibl;
4703 *tokid = kid;
4704 }
4705 scalar(kid);
4706 break;
4707 case OA_SCALARREF:
a0d0e21e 4708 mod(scalar(kid), type);
79072805
LW		 4709 break;
4710 }
4711 oa >>= 4;
4712 tokid = &kid->op_sibling;
4713 kid = kid->op_sibling;
4714 }
11343788 4715 o->op_private |= numargs;
79072805 4716 if (kid)
22c35a8c 4717 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 4718 listkids(o);
79072805 4719 }
22c35a8c 4720 else if (PL_opargs[type] & OA_DEFGV) {
11343788 4721 op_free(o);
54b9620d 4722 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4723 }
4724
79072805
LW		 4725 if (oa) {
4726 while (oa & OA_OPTIONAL)
4727 oa >>= 4;
4728 if (oa && oa != OA_LIST)
22c35a8c 4729 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 4730 }
11343788 4731 return o;
79072805
LW		 4732}
4733
4734OP *
8ac85365 4735ck_glob(OP *o)
79072805 4736{
fb73857a 4737 GV *gv;
4738
1f2bfc8a 4739 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4740 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4741
4742 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4743 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4744
4745 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4746 static int glob_index;
4747
5196be3e 4748 append_elem(OP_GLOB, o,
46fc3d4c 4749 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a 4750 o->op_type = OP_LIST;
22c35a8c 4751 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 4752 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 4753 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 4754 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4755 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4756 scalar(newUNOP(OP_RV2CV, 0,
4757 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4758 o = newUNOP(OP_NULL, 0, ck_subr(o));
4759 o->op_targ = OP_GLOB; /* hint at what it used to be */
4760 return o;
b1cb66bf 4761 }
4762 gv = newGVgen("main");
a0d0e21e 4763 gv_IOadd(gv);
11343788
MB		 4764 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4765 scalarkids(o);
4766 return ck_fun(o);
79072805
LW		 4767}
4768
4769OP *
8ac85365 4770ck_grep(OP *o)
79072805
LW		 4771{
4772 LOGOP *gwop;
4773 OP *kid;
11343788 4774 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4775
22c35a8c 4776 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
a0d0e21e 4777 Newz(1101, gwop, 1, LOGOP);
aeea060c 4778
11343788 4779 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4780 OP* k;
11343788
MB		 4781 o = ck_sort(o);
4782 kid = cLISTOPo->op_first->op_sibling;
4783 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4784 kid = k;
4785 }
4786 kid->op_next = (OP*)gwop;
11343788 4787 o->op_flags &= ~OPf_STACKED;
93a17b20 4788 }
11343788 4789 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4790 if (type == OP_MAPWHILE)
4791 list(kid);
4792 else
4793 scalar(kid);
11343788 4794 o = ck_fun(o);
3280af22 4795 if (PL_error_count)
11343788 4796 return o;
aeea060c 4797 kid = cLISTOPo->op_first->op_sibling;
79072805 4798 if (kid->op_type != OP_NULL)
463ee0b2 4799 croak("panic: ck_grep");
79072805
LW		 4800 kid = kUNOP->op_first;
4801
a0d0e21e 4802 gwop->op_type = type;
22c35a8c 4803 gwop->op_ppaddr = PL_ppaddr[type];
11343788 4804 gwop->op_first = listkids(o);
79072805
LW		 4805 gwop->op_flags |= OPf_KIDS;
4806 gwop->op_private = 1;
4807 gwop->op_other = LINKLIST(kid);
a0d0e21e 4808 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4809 kid->op_next = (OP*)gwop;
4810
11343788 4811 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4812 if (!kid || !kid->op_sibling)
22c35a8c 4813 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 4814 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4815 mod(kid, OP_GREPSTART);
4816
79072805
LW		 4817 return (OP*)gwop;
4818}
4819
4820OP *
8ac85365 4821ck_index(OP *o)
79072805 4822{
11343788
MB		 4823 if (o->op_flags & OPf_KIDS) {
4824 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 4825 if (kid)
4826 kid = kid->op_sibling; /* get past "big" */
79072805 4827 if (kid && kid->op_type == OP_CONST)
2779dcf1 4828 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4829 }
11343788 4830 return ck_fun(o);
79072805
LW		 4831}
4832
4833OP *
8ac85365 4834ck_lengthconst(OP *o)
79072805
LW		 4835{
4836 /* XXX length optimization goes here */
11343788 4837 return ck_fun(o);
79072805
LW		 4838}
4839
4840OP *
8ac85365 4841ck_lfun(OP *o)
79072805 4842{
5dc0d613
MB		 4843 OPCODE type = o->op_type;
4844 return modkids(ck_fun(o), type);
79072805
LW		 4845}
4846
4847OP *
8ac85365 4848ck_rfun(OP *o)
8990e307 4849{
5dc0d613
MB		 4850 OPCODE type = o->op_type;
4851 return refkids(ck_fun(o), type);
8990e307
LW		 4852}
4853
4854OP *
8ac85365 4855ck_listiob(OP *o)
79072805
LW		 4856{
4857 register OP *kid;
aeea060c 4858
11343788 4859 kid = cLISTOPo->op_first;
79072805 4860 if (!kid) {
11343788
MB		 4861 o = force_list(o);
4862 kid = cLISTOPo->op_first;
79072805
LW		 4863 }
4864 if (kid->op_type == OP_PUSHMARK)
4865 kid = kid->op_sibling;
11343788 4866 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4867 kid = kid->op_sibling;
4868 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4869 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4870 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4871 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4872 cLISTOPo->op_first->op_sibling = kid;
4873 cLISTOPo->op_last = kid;
79072805
LW		 4874 kid = kid->op_sibling;
4875 }
4876 }
4877
4878 if (!kid)
54b9620d 4879 append_elem(o->op_type, o, newDEFSVOP());
79072805 4880
5dc0d613 4881 o = listkids(o);
bbce6d69 4882
5dc0d613 4883 o->op_private = 0;
36477c24 4884#ifdef USE_LOCALE
3280af22 4885 if (PL_hints & HINT_LOCALE)
5dc0d613 4886 o->op_private |= OPpLOCALE;
bbce6d69 4887#endif
4888
5dc0d613 4889 return o;
bbce6d69 4890}
4891
4892OP *
8ac85365 4893ck_fun_locale(OP *o)
bbce6d69 4894{
5dc0d613 4895 o = ck_fun(o);
bbce6d69 4896
5dc0d613 4897 o->op_private = 0;
36477c24 4898#ifdef USE_LOCALE
3280af22 4899 if (PL_hints & HINT_LOCALE)
5dc0d613 4900 o->op_private |= OPpLOCALE;
bbce6d69 4901#endif
4902
5dc0d613 4903 return o;
bbce6d69 4904}
4905
4906OP *
8ac85365 4907ck_scmp(OP *o)
bbce6d69 4908{
5dc0d613 4909 o->op_private = 0;
36477c24 4910#ifdef USE_LOCALE
3280af22 4911 if (PL_hints & HINT_LOCALE)
5dc0d613 4912 o->op_private |= OPpLOCALE;
bbce6d69 4913#endif
36477c24 4914
5dc0d613 4915 return o;
79072805
LW		 4916}
4917
4918OP *
8ac85365 4919ck_match(OP *o)
79072805 4920{
5dc0d613 4921 o->op_private |= OPpRUNTIME;
11343788 4922 return o;
79072805
LW		 4923}
4924
4925OP *
8ac85365 4926ck_null(OP *o)
79072805 4927{
11343788 4928 return o;
79072805
LW		 4929}
4930
4931OP *
8ac85365 4932ck_repeat(OP *o)
79072805 4933{
11343788
MB		 4934 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4935 o->op_private |= OPpREPEAT_DOLIST;
4936 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4937 }
4938 else
11343788
MB		 4939 scalar(o);
4940 return o;
79072805
LW		 4941}
4942
4943OP *
8ac85365 4944ck_require(OP *o)
8990e307 4945{
11343788
MB		 4946 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4947 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4948
4949 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4950 char *s;
a0d0e21e
LW		 4951 for (s = SvPVX(kid->op_sv); *s; s++) {
4952 if (*s == ':' && s[1] == ':') {
4953 *s = '/';
1aef975c 4954 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4955 --SvCUR(kid->op_sv);
4956 }
8990e307 4957 }
a0d0e21e 4958 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4959 }
4960 }
11343788 4961 return ck_fun(o);
8990e307
LW		 4962}
4963
22c35a8c 4964#if 0
8990e307 4965OP *
8ac85365 4966ck_retarget(OP *o)
79072805 4967{
463ee0b2 4968 croak("NOT IMPL LINE %d",__LINE__);
79072805 4969 /* STUB */
11343788 4970 return o;
79072805 4971}
22c35a8c 4972#endif
79072805
LW		 4973
4974OP *
8ac85365 4975ck_select(OP *o)
79072805 4976{
c07a80fd 4977 OP* kid;
11343788
MB		 4978 if (o->op_flags & OPf_KIDS) {
4979 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4980 if (kid && kid->op_sibling) {
11343788 4981 o->op_type = OP_SSELECT;
22c35a8c 4982 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 4983 o = ck_fun(o);
4984 return fold_constants(o);
79072805
LW		 4985 }
4986 }
11343788
MB		 4987 o = ck_fun(o);
4988 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4989 if (kid && kid->op_type == OP_RV2GV)
4990 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4991 return o;
79072805
LW		 4992}
4993
4994OP *
8ac85365 4995ck_shift(OP *o)
79072805 4996{
11343788 4997 I32 type = o->op_type;
79072805 4998
11343788 4999 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 5000 OP *argop;
5001
11343788 5002 op_free(o);
6d4ff0d2 5003#ifdef USE_THREADS
533c011a 5004 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 5005 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 5006 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 5007 }
5008 else {
5009 argop = newUNOP(OP_RV2AV, 0,
5010 scalar(newGVOP(OP_GV, 0,
5011 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5012 }
5013#else
5014 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5015 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5016 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5017#endif /* USE_THREADS */
5018 return newUNOP(type, 0, scalar(argop));
79072805 5019 }
11343788 5020 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5021}
5022
5023OP *
8ac85365 5024ck_sort(OP *o)
79072805 5025{
5dc0d613 5026 o->op_private = 0;
36477c24 5027#ifdef USE_LOCALE
3280af22 5028 if (PL_hints & HINT_LOCALE)
5dc0d613 5029 o->op_private |= OPpLOCALE;
bbce6d69 5030#endif
5031
11343788
MB		 5032 if (o->op_flags & OPf_STACKED) {
5033 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 5034 OP *k;
5035 kid = kUNOP->op_first; /* get past rv2gv */
79072805 5036
463ee0b2 5037 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5038 linklist(kid);
463ee0b2
LW		 5039 if (kid->op_type == OP_SCOPE) {
5040 k = kid->op_next;
5041 kid->op_next = 0;
79072805 5042 }
463ee0b2 5043 else if (kid->op_type == OP_LEAVE) {
11343788 5044 if (o->op_type == OP_SORT) {
748a9306
LW		 5045 null(kid); /* wipe out leave */
5046 kid->op_next = kid;
463ee0b2 5047
748a9306
LW		 5048 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5049 if (k->op_next == kid)
5050 k->op_next = 0;
5051 }
463ee0b2 5052 }
748a9306
LW		 5053 else
5054 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5055 k = kLISTOP->op_first;
463ee0b2 5056 }
a0d0e21e
LW		 5057 peep(k);
5058
11343788 5059 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 5060 null(kid); /* wipe out rv2gv */
11343788 5061 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5062 kid->op_next = kid;
5063 else
5064 kid->op_next = k;
11343788 5065 o->op_flags |= OPf_SPECIAL;
79072805 5066 }
c6e96bcb
GS		 5067 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5068 null(cLISTOPo->op_first->op_sibling);
79072805 5069 }
bbce6d69 5070
11343788 5071 return o;
79072805
LW		 5072}
5073
5074OP *
8ac85365 5075ck_split(OP *o)
79072805
LW		 5076{
5077 register OP *kid;
aeea060c 5078
11343788
MB		 5079 if (o->op_flags & OPf_STACKED)
5080 return no_fh_allowed(o);
79072805 5081
11343788 5082 kid = cLISTOPo->op_first;
8990e307 5083 if (kid->op_type != OP_NULL)
463ee0b2 5084 croak("panic: ck_split");
8990e307 5085 kid = kid->op_sibling;
11343788
MB		 5086 op_free(cLISTOPo->op_first);
5087 cLISTOPo->op_first = kid;
85e6fe83 5088 if (!kid) {
11343788
MB		 5089 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
5090 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5091 }
79072805
LW		 5092
5093 if (kid->op_type != OP_MATCH) {
5094 OP *sibl = kid->op_sibling;
463ee0b2 5095 kid->op_sibling = 0;
79072805 5096 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5097 if (cLISTOPo->op_first == cLISTOPo->op_last)
5098 cLISTOPo->op_last = kid;
5099 cLISTOPo->op_first = kid;
79072805
LW		 5100 kid->op_sibling = sibl;
5101 }
5102
5103 kid->op_type = OP_PUSHRE;
22c35a8c 5104 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5105 scalar(kid);
5106
5107 if (!kid->op_sibling)
54b9620d 5108 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5109
5110 kid = kid->op_sibling;
5111 scalar(kid);
5112
5113 if (!kid->op_sibling)
11343788 5114 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5115
5116 kid = kid->op_sibling;
5117 scalar(kid);
5118
5119 if (kid->op_sibling)
22c35a8c 5120 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5121
11343788 5122 return o;
79072805
LW		 5123}
5124
5125OP *
8ac85365 5126ck_subr(OP *o)
79072805 5127{
11343788
MB		 5128 dTHR;
5129 OP *prev = ((cUNOPo->op_first->op_sibling)
5130 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5131 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5132 OP *cvop;
5133 char *proto = 0;
5134 CV *cv = 0;
46fc3d4c 5135 GV *namegv = 0;
4633a7c4
LW		 5136 int optional = 0;
5137 I32 arg = 0;
5138
11343788 5139 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5140 if (cvop->op_type == OP_RV2CV) {
5141 SVOP* tmpop;
11343788 5142 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5143 null(cvop); /* disable rv2cv */
5144 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
5145 if (tmpop->op_type == OP_GV) {
8ebc5c01 5146 cv = GvCVu(tmpop->op_sv);
5dc0d613 5147 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 5148 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
3280af22 5149 proto = SvPV((SV*)cv, PL_na);
46fc3d4c 5150 }
4633a7c4
LW		 5151 }
5152 }
3280af22
NIS		 5153 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5154 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5155 o->op_private |= OPpENTERSUB_DB;
5156 while (o2 != cvop) {
4633a7c4
LW		 5157 if (proto) {
5158 switch (*proto) {
5159 case '\0':
5dc0d613 5160 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5161 case ';':
5162 optional = 1;
5163 proto++;
5164 continue;
5165 case '$':
5166 proto++;
5167 arg++;
11343788 5168 scalar(o2);
4633a7c4
LW		 5169 break;
5170 case '%':
5171 case '@':
11343788 5172 list(o2);
4633a7c4
LW		 5173 arg++;
5174 break;
5175 case '&':
5176 proto++;
5177 arg++;
11343788 5178 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5179 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5180 break;
5181 case '*':
5182 proto++;
5183 arg++;
11343788 5184 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 5185 goto wrapref;
5186 {
11343788 5187 OP* kid = o2;
69dcf70c 5188 OP* sib = kid->op_sibling;
4633a7c4 5189 kid->op_sibling = 0;
69dcf70c
MB		 5190 o2 = newUNOP(OP_RV2GV, 0, kid);
5191 o2->op_sibling = sib;
6fa846a0 5192 prev->op_sibling = o2;
4633a7c4
LW		 5193 }
5194 goto wrapref;
5195 case '\\':
5196 proto++;
5197 arg++;
5198 switch (*proto++) {
5199 case '*':
11343788 5200 if (o2->op_type != OP_RV2GV)
5dc0d613 5201 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5202 goto wrapref;
5203 case '&':
11343788 5204 if (o2->op_type != OP_RV2CV)
5dc0d613 5205 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5206 goto wrapref;
5207 case '$':
386acf99
GS		 5208 if (o2->op_type != OP_RV2SV
5209 && o2->op_type != OP_PADSV
5210 && o2->op_type != OP_THREADSV)
5211 {
5dc0d613 5212 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5213 }
4633a7c4
LW		 5214 goto wrapref;
5215 case '@':
11343788 5216 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5217 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5218 goto wrapref;
5219 case '%':
11343788 5220 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5221 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5222 wrapref:
5223 {
11343788 5224 OP* kid = o2;
6fa846a0 5225 OP* sib = kid->op_sibling;
4633a7c4 5226 kid->op_sibling = 0;
6fa846a0
GS		 5227 o2 = newUNOP(OP_REFGEN, 0, kid);
5228 o2->op_sibling = sib;
e858de61 5229 prev->op_sibling = o2;
4633a7c4
LW		 5230 }
5231 break;
5232 default: goto oops;
5233 }
5234 break;
b1cb66bf 5235 case ' ':
5236 proto++;
5237 continue;
4633a7c4
LW		 5238 default:
5239 oops:
5240 croak("Malformed prototype for %s: %s",
3280af22 5241 gv_ename(namegv), SvPV((SV*)cv, PL_na));
4633a7c4
LW		 5242 }
5243 }
5244 else
11343788
MB		 5245 list(o2);
5246 mod(o2, OP_ENTERSUB);
5247 prev = o2;
5248 o2 = o2->op_sibling;
4633a7c4 5249 }
fb73857a 5250 if (proto && !optional &&
5251 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5252 return too_few_arguments(o, gv_ename(namegv));
11343788 5253 return o;
79072805
LW		 5254}
5255
5256OP *
8ac85365 5257ck_svconst(OP *o)
8990e307 5258{
11343788
MB		 5259 SvREADONLY_on(cSVOPo->op_sv);
5260 return o;
8990e307
LW		 5261}
5262
5263OP *
8ac85365 5264ck_trunc(OP *o)
79072805 5265{
11343788
MB		 5266 if (o->op_flags & OPf_KIDS) {
5267 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5268
a0d0e21e
LW		 5269 if (kid->op_type == OP_NULL)
5270 kid = (SVOP*)kid->op_sibling;
5271 if (kid &&
5272 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 5273 o->op_flags |= OPf_SPECIAL;
79072805 5274 }
11343788 5275 return ck_fun(o);
79072805
LW		 5276}
5277
463ee0b2
LW		 5278/* A peephole optimizer. We visit the ops in the order they're to execute. */
5279
79072805 5280void
8ac85365 5281peep(register OP *o)
79072805 5282{
11343788 5283 dTHR;
79072805 5284 register OP* oldop = 0;
a0d0e21e 5285 if (!o || o->op_seq)
79072805 5286 return;
a0d0e21e 5287 ENTER;
462e5cf6 5288 SAVEOP();
3280af22 5289 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5290 for (; o; o = o->op_next) {
5291 if (o->op_seq)
5292 break;
3280af22
NIS		 5293 if (!PL_op_seqmax)
5294 PL_op_seqmax++;
533c011a 5295 PL_op = o;
a0d0e21e
LW		 5296 switch (o->op_type) {
5297 case OP_NEXTSTATE:
5298 case OP_DBSTATE:
3280af22
NIS		 5299 PL_curcop = ((COP*)o); /* for warnings */
5300 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5301 break;
5302
5303 case OP_CONCAT:
5304 case OP_CONST:
5305 case OP_JOIN:
5306 case OP_UC:
5307 case OP_UCFIRST:
5308 case OP_LC:
5309 case OP_LCFIRST:
5310 case OP_QUOTEMETA:
3c4f770c 5311 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 5312 null(o->op_next);
3280af22 5313 o->op_seq = PL_op_seqmax++;
a0d0e21e 5314 break;
8990e307 5315 case OP_STUB:
54310121 5316 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5317 o->op_seq = PL_op_seqmax++;
54310121 5318 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5319 }
748a9306 5320 goto nothin;
79072805 5321 case OP_NULL:
748a9306 5322 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 5323 PL_curcop = ((COP*)o);
748a9306 5324 goto nothin;
79072805 5325 case OP_SCALAR:
93a17b20 5326 case OP_LINESEQ:
463ee0b2 5327 case OP_SCOPE:
748a9306 5328 nothin:
a0d0e21e
LW		 5329 if (oldop && o->op_next) {
5330 oldop->op_next = o->op_next;
79072805
LW		 5331 continue;
5332 }
3280af22 5333 o->op_seq = PL_op_seqmax++;
79072805
LW		 5334 break;
5335
5336 case OP_GV:
a0d0e21e 5337 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5338 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5339 null(o->op_next);
5340 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5341 o->op_next = o->op_next->op_next;
5342 o->op_type = OP_GVSV;
22c35a8c 5343 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 5344 }
5345 }
a0d0e21e
LW		 5346 else if (o->op_next->op_type == OP_RV2AV) {
5347 OP* pop = o->op_next->op_next;
5348 IV i;
8990e307 5349 if (pop->op_type == OP_CONST &&
533c011a 5350 (PL_op = pop->op_next) &&
8990e307 5351 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5352 !(pop->op_next->op_private &
68dc0745 5353 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5354 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5355 <= 255 &&
8990e307
LW		 5356 i >= 0)
5357 {
748a9306 5358 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 5359 null(o->op_next);
8990e307
LW		 5360 null(pop->op_next);
5361 null(pop);
a0d0e21e
LW		 5362 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5363 o->op_next = pop->op_next->op_next;
5364 o->op_type = OP_AELEMFAST;
22c35a8c 5365 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 5366 o->op_private = (U8)i;
a6006777 5367 GvAVn(((GVOP*)o)->op_gv);
8990e307 5368 }
79072805 5369 }
3280af22 5370 o->op_seq = PL_op_seqmax++;
79072805
LW		 5371 break;
5372
a0d0e21e 5373 case OP_MAPWHILE:
79072805
LW		 5374 case OP_GREPWHILE:
5375 case OP_AND:
5376 case OP_OR:
3280af22 5377 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5378 while (cLOGOP->op_other->op_type == OP_NULL)
5379 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5380 peep(cLOGOP->op_other);
5381 break;
5382
5383 case OP_COND_EXPR:
3280af22 5384 o->op_seq = PL_op_seqmax++;
79072805
LW		 5385 peep(cCONDOP->op_true);
5386 peep(cCONDOP->op_false);
5387 break;
5388
5389 case OP_ENTERLOOP:
3280af22 5390 o->op_seq = PL_op_seqmax++;
79072805
LW		 5391 peep(cLOOP->op_redoop);
5392 peep(cLOOP->op_nextop);
5393 peep(cLOOP->op_lastop);
5394 break;
5395
8782bef2 5396 case OP_QR:
79072805
LW		 5397 case OP_MATCH:
5398 case OP_SUBST:
3280af22 5399 o->op_seq = PL_op_seqmax++;
a0d0e21e 5400 peep(cPMOP->op_pmreplstart);
79072805
LW		 5401 break;
5402
a0d0e21e 5403 case OP_EXEC:
3280af22 5404 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5405 if (ckWARN(WARN_SYNTAX) && o->op_next
5406 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5407 if (o->op_next->op_sibling &&
20408e3c
GS		 5408 o->op_next->op_sibling->op_type != OP_EXIT &&
5409 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5410 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5411 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5412
3280af22 5413 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
599cee73
PM		 5414 warner(WARN_SYNTAX, "Statement unlikely to be reached");
5415 warner(WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5416 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5417 }
5418 }
5419 break;
aeea060c 5420
c750a3ec
MB		 5421 case OP_HELEM: {
5422 UNOP *rop;
5423 SV *lexname;
5424 GV **fields;
5425 SV **svp, **indsvp;
5426 I32 ind;
5427 char *key;
5428 STRLEN keylen;
aeea060c 5429
c750a3ec
MB		 5430 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
5431 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5432 break;
5433 rop = (UNOP*)((BINOP*)o)->op_first;
5434 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5435 break;
3280af22 5436 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 5437 if (!SvOBJECT(lexname))
5438 break;
5196be3e 5439 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5440 if (!fields || !GvHV(*fields))
5441 break;
5442 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5443 key = SvPV(*svp, keylen);
5444 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5445 if (!indsvp) {
5446 croak("No such field \"%s\" in variable %s of type %s",
3280af22 5447 key, SvPV(lexname, PL_na), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 5448 }
5449 ind = SvIV(*indsvp);
5450 if (ind < 1)
5451 croak("Bad index while coercing array into hash");
5452 rop->op_type = OP_RV2AV;
22c35a8c 5453 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 5454 o->op_type = OP_AELEM;
22c35a8c 5455 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 5456 SvREFCNT_dec(*svp);
5457 *svp = newSViv(ind);
5458 break;
5459 }
5460
79072805 5461 default:
3280af22 5462 o->op_seq = PL_op_seqmax++;
79072805
LW		 5463 break;
5464 }
a0d0e21e 5465 oldop = o;
79072805 5466 }
a0d0e21e 5467 LEAVE;
79072805 5468}
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