3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
13 * of your inquisitiveness, I shall spend all the rest of my days in answering
14 * you. What more do you want to know?'
15 * 'The names of all the stars, and of all living things, and the whole
16 * history of Middle-earth and Over-heaven and of the Sundering Seas,'
19 * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"]
25 A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
26 It is a structure that holds a pointer to a scalar, an array, a hash etc,
27 corresponding to $foo, @foo, %foo.
29 GVs are usually found as values in stashes (symbol table hashes) where
30 Perl stores its global variables.
40 static const char S_autoload[] = "AUTOLOAD";
41 static const STRLEN S_autolen = sizeof(S_autoload)-1;
44 Perl_gv_add_by_type(pTHX_ GV *gv, svtype type)
51 SvTYPE((const SV *)gv) != SVt_PVGV
52 && SvTYPE((const SV *)gv) != SVt_PVLV
56 if (type == SVt_PVIO) {
58 * if it walks like a dirhandle, then let's assume that
59 * this is a dirhandle.
61 what = PL_op->op_type == OP_READDIR ||
62 PL_op->op_type == OP_TELLDIR ||
63 PL_op->op_type == OP_SEEKDIR ||
64 PL_op->op_type == OP_REWINDDIR ||
65 PL_op->op_type == OP_CLOSEDIR ?
66 "dirhandle" : "filehandle";
67 /* diag_listed_as: Bad symbol for filehandle */
68 } else if (type == SVt_PVHV) {
71 what = type == SVt_PVAV ? "array" : "scalar";
73 Perl_croak(aTHX_ "Bad symbol for %s", what);
76 if (type == SVt_PVHV) {
77 where = (SV **)&GvHV(gv);
78 } else if (type == SVt_PVAV) {
79 where = (SV **)&GvAV(gv);
80 } else if (type == SVt_PVIO) {
81 where = (SV **)&GvIOp(gv);
87 *where = newSV_type(type);
92 Perl_gv_fetchfile(pTHX_ const char *name)
94 PERL_ARGS_ASSERT_GV_FETCHFILE;
95 return gv_fetchfile_flags(name, strlen(name), 0);
99 Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen,
105 const STRLEN tmplen = namelen + 2;
108 PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS;
109 PERL_UNUSED_ARG(flags);
114 if (tmplen <= sizeof smallbuf)
117 Newx(tmpbuf, tmplen, char);
118 /* This is where the debugger's %{"::_<$filename"} hash is created */
121 memcpy(tmpbuf + 2, name, namelen);
122 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
124 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
125 #ifdef PERL_DONT_CREATE_GVSV
126 GvSV(gv) = newSVpvn(name, namelen);
128 sv_setpvn(GvSV(gv), name, namelen);
131 if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv))
132 hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
133 if (tmpbuf != smallbuf)
139 =for apidoc gv_const_sv
141 If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for
142 inlining, or C<gv> is a placeholder reference that would be promoted to such
143 a typeglob, then returns the value returned by the sub. Otherwise, returns
150 Perl_gv_const_sv(pTHX_ GV *gv)
152 PERL_ARGS_ASSERT_GV_CONST_SV;
154 if (SvTYPE(gv) == SVt_PVGV)
155 return cv_const_sv(GvCVu(gv));
156 return SvROK(gv) ? SvRV(gv) : NULL;
160 Perl_newGP(pTHX_ GV *const gv)
165 const char *const file
166 = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : "";
167 const STRLEN len = strlen(file);
169 SV *const temp_sv = CopFILESV(PL_curcop);
173 PERL_ARGS_ASSERT_NEWGP;
176 file = SvPVX(temp_sv);
177 len = SvCUR(temp_sv);
184 PERL_HASH(hash, file, len);
188 #ifndef PERL_DONT_CREATE_GVSV
189 gp->gp_sv = newSV(0);
192 gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0;
193 /* XXX Ideally this cast would be replaced with a change to const char*
195 gp->gp_file_hek = share_hek(file, len, hash);
202 /* Assign CvGV(cv) = gv, handling weak references.
203 * See also S_anonymise_cv_maybe */
206 Perl_cvgv_set(pTHX_ CV* cv, GV* gv)
208 GV * const oldgv = CvGV(cv);
209 PERL_ARGS_ASSERT_CVGV_SET;
220 sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv));
224 SvANY(cv)->xcv_gv = gv;
225 assert(!CvCVGV_RC(cv));
230 if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv))
231 Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv));
234 SvREFCNT_inc_simple_void_NN(gv);
238 /* Assign CvSTASH(cv) = st, handling weak references. */
241 Perl_cvstash_set(pTHX_ CV *cv, HV *st)
243 HV *oldst = CvSTASH(cv);
244 PERL_ARGS_ASSERT_CVSTASH_SET;
248 sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv));
249 SvANY(cv)->xcv_stash = st;
251 Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv));
255 Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
258 const U32 old_type = SvTYPE(gv);
259 const bool doproto = old_type > SVt_NULL;
260 char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
261 const STRLEN protolen = proto ? SvCUR(gv) : 0;
262 SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
263 const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0;
265 PERL_ARGS_ASSERT_GV_INIT;
266 assert (!(proto && has_constant));
269 /* The constant has to be a simple scalar type. */
270 switch (SvTYPE(has_constant)) {
276 Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
277 sv_reftype(has_constant, 0));
285 if (old_type < SVt_PVGV) {
286 if (old_type >= SVt_PV)
288 sv_upgrade(MUTABLE_SV(gv), SVt_PVGV);
296 Safefree(SvPVX_mutable(gv));
301 GvGP_set(gv, Perl_newGP(aTHX_ gv));
304 Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv));
305 gv_name_set(gv, name, len, GV_ADD);
306 if (multi || doproto) /* doproto means it _was_ mentioned */
308 if (doproto) { /* Replicate part of newSUB here. */
314 /* newCONSTSUB doesn't take a len arg, so make sure we
315 * give it a \0-terminated string */
316 name0 = savepvn(name,len);
318 /* newCONSTSUB takes ownership of the reference from us. */
319 cv = newCONSTSUB(stash, (name0 ? name0 : name), has_constant);
320 /* In case op.c:S_process_special_blocks stole it: */
322 GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv));
323 assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */
326 /* If this reference was a copy of another, then the subroutine
327 must have been "imported", by a Perl space assignment to a GV
328 from a reference to CV. */
329 if (exported_constant)
330 GvIMPORTED_CV_on(gv);
332 (void) start_subparse(0,0); /* Create empty CV in compcv. */
338 mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */
340 CvFILE_set_from_cop(cv, PL_curcop);
341 CvSTASH_set(cv, PL_curstash);
343 sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen,
344 SV_HAS_TRAILING_NUL);
350 S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type)
352 PERL_ARGS_ASSERT_GV_INIT_SV;
364 #ifdef PERL_DONT_CREATE_GVSV
372 /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13
373 If we just cast GvSVn(gv) to void, it ignores evaluating it for
381 =for apidoc gv_fetchmeth
383 Returns the glob with the given C<name> and a defined subroutine or
384 C<NULL>. The glob lives in the given C<stash>, or in the stashes
385 accessible via @ISA and UNIVERSAL::.
387 The argument C<level> should be either 0 or -1. If C<level==0>, as a
388 side-effect creates a glob with the given C<name> in the given C<stash>
389 which in the case of success contains an alias for the subroutine, and sets
390 up caching info for this glob.
392 This function grants C<"SUPER"> token as a postfix of the stash name. The
393 GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
394 visible to Perl code. So when calling C<call_sv>, you should not use
395 the GV directly; instead, you should use the method's CV, which can be
396 obtained from the GV with the C<GvCV> macro.
401 /* NOTE: No support for tied ISA */
404 Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
412 GV* candidate = NULL;
417 I32 create = (level >= 0) ? 1 : 0;
422 PERL_ARGS_ASSERT_GV_FETCHMETH;
424 /* UNIVERSAL methods should be callable without a stash */
426 create = 0; /* probably appropriate */
427 if(!(stash = gv_stashpvs("UNIVERSAL", 0)))
433 hvname = HvNAME_get(stash);
435 Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup");
440 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
442 topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation;
444 /* check locally for a real method or a cache entry */
445 gvp = (GV**)hv_fetch(stash, name, len, create);
449 if (SvTYPE(topgv) != SVt_PVGV)
450 gv_init(topgv, stash, name, len, TRUE);
451 if ((cand_cv = GvCV(topgv))) {
452 /* If genuine method or valid cache entry, use it */
453 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) {
457 /* stale cache entry, junk it and move on */
458 SvREFCNT_dec(cand_cv);
459 GvCV_set(topgv, NULL);
464 else if (GvCVGEN(topgv) == topgen_cmp) {
465 /* cache indicates no such method definitively */
470 packlen = HvNAMELEN_get(stash);
471 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
474 basestash = gv_stashpvn(hvname, packlen, GV_ADD);
475 linear_av = mro_get_linear_isa(basestash);
478 linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
481 linear_svp = AvARRAY(linear_av) + 1; /* skip over self */
482 items = AvFILLp(linear_av); /* no +1, to skip over self */
484 linear_sv = *linear_svp++;
486 cstash = gv_stashsv(linear_sv, 0);
489 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA",
490 SVfARG(linear_sv), hvname);
496 gvp = (GV**)hv_fetch(cstash, name, len, 0);
500 if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE);
501 if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) {
503 * Found real method, cache method in topgv if:
504 * 1. topgv has no synonyms (else inheritance crosses wires)
505 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
507 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
508 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
509 SvREFCNT_inc_simple_void_NN(cand_cv);
510 GvCV_set(topgv, cand_cv);
511 GvCVGEN(topgv) = topgen_cmp;
517 /* Check UNIVERSAL without caching */
518 if(level == 0 || level == -1) {
519 candidate = gv_fetchmeth(NULL, name, len, 1);
521 cand_cv = GvCV(candidate);
522 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
523 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
524 SvREFCNT_inc_simple_void_NN(cand_cv);
525 GvCV_set(topgv, cand_cv);
526 GvCVGEN(topgv) = topgen_cmp;
532 if (topgv && GvREFCNT(topgv) == 1) {
533 /* cache the fact that the method is not defined */
534 GvCVGEN(topgv) = topgen_cmp;
541 =for apidoc gv_fetchmeth_autoload
543 Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
544 Returns a glob for the subroutine.
546 For an autoloaded subroutine without a GV, will create a GV even
547 if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
548 of the result may be zero.
554 Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
556 GV *gv = gv_fetchmeth(stash, name, len, level);
558 PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD;
565 return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
566 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
568 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
571 if (!(CvROOT(cv) || CvXSUB(cv)))
573 /* Have an autoload */
574 if (level < 0) /* Cannot do without a stub */
575 gv_fetchmeth(stash, name, len, 0);
576 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
585 =for apidoc gv_fetchmethod_autoload
587 Returns the glob which contains the subroutine to call to invoke the method
588 on the C<stash>. In fact in the presence of autoloading this may be the
589 glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
592 The third parameter of C<gv_fetchmethod_autoload> determines whether
593 AUTOLOAD lookup is performed if the given method is not present: non-zero
594 means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
595 Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
596 with a non-zero C<autoload> parameter.
598 These functions grant C<"SUPER"> token as a prefix of the method name. Note
599 that if you want to keep the returned glob for a long time, you need to
600 check for it being "AUTOLOAD", since at the later time the call may load a
601 different subroutine due to $AUTOLOAD changing its value. Use the glob
602 created via a side effect to do this.
604 These functions have the same side-effects and as C<gv_fetchmeth> with
605 C<level==0>. C<name> should be writable if contains C<':'> or C<'
606 ''>. The warning against passing the GV returned by C<gv_fetchmeth> to
607 C<call_sv> apply equally to these functions.
613 S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen)
620 PERL_ARGS_ASSERT_GV_GET_SUPER_PKG;
622 stash = gv_stashpvn(name, namelen, 0);
623 if(stash) return stash;
625 /* If we must create it, give it an @ISA array containing
626 the real package this SUPER is for, so that it's tied
627 into the cache invalidation code correctly */
628 stash = gv_stashpvn(name, namelen, GV_ADD);
629 gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
631 gv_init(gv, stash, "ISA", 3, TRUE);
632 superisa = GvAVn(gv);
634 sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0);
636 av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0));
638 av_push(superisa, newSVhek(CopSTASH(PL_curcop)
639 ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL));
646 Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
648 PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD;
650 return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0);
653 /* Don't merge this yet, as it's likely to get a len parameter, and possibly
656 Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags)
659 register const char *nend;
660 const char *nsplit = NULL;
663 const char * const origname = name;
664 SV *const error_report = MUTABLE_SV(stash);
665 const U32 autoload = flags & GV_AUTOLOAD;
666 const U32 do_croak = flags & GV_CROAK;
668 PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS;
670 if (SvTYPE(stash) < SVt_PVHV)
673 /* The only way stash can become NULL later on is if nsplit is set,
674 which in turn means that there is no need for a SVt_PVHV case
675 the error reporting code. */
678 for (nend = name; *nend; nend++) {
683 else if (*nend == ':' && *(nend + 1) == ':') {
689 if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
690 /* ->SUPER::method should really be looked up in original stash */
691 SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
692 CopSTASHPV(PL_curcop)));
693 /* __PACKAGE__::SUPER stash should be autovivified */
694 stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr));
695 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
696 origname, HvNAME_get(stash), name) );
699 /* don't autovifify if ->NoSuchStash::method */
700 stash = gv_stashpvn(origname, nsplit - origname, 0);
702 /* however, explicit calls to Pkg::SUPER::method may
703 happen, and may require autovivification to work */
704 if (!stash && (nsplit - origname) >= 7 &&
705 strnEQ(nsplit - 7, "::SUPER", 7) &&
706 gv_stashpvn(origname, nsplit - origname - 7, 0))
707 stash = gv_get_super_pkg(origname, nsplit - origname);
712 gv = gv_fetchmeth(stash, name, nend - name, 0);
714 if (strEQ(name,"import") || strEQ(name,"unimport"))
715 gv = MUTABLE_GV(&PL_sv_yes);
717 gv = gv_autoload4(ostash, name, nend - name, TRUE);
718 if (!gv && do_croak) {
719 /* Right now this is exclusively for the benefit of S_method_common
722 /* If we can't find an IO::File method, it might be a call on
723 * a filehandle. If IO:File has not been loaded, try to
724 * require it first instead of croaking */
725 const char *stash_name = HvNAME_get(stash);
726 if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File")
727 && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL,
728 STR_WITH_LEN("IO/File.pm"), 0,
729 HV_FETCH_ISEXISTS, NULL, 0)
731 require_pv("IO/File.pm");
732 gv = gv_fetchmeth(stash, name, nend - name, 0);
737 "Can't locate object method \"%s\" via package \"%.*s\"",
738 name, (int)HvNAMELEN_get(stash), HvNAME_get(stash));
742 const char *packname;
745 packlen = nsplit - origname;
748 packname = SvPV_const(error_report, packlen);
752 "Can't locate object method \"%s\" via package \"%.*s\""
753 " (perhaps you forgot to load \"%.*s\"?)",
754 name, (int)packlen, packname, (int)packlen, packname);
759 CV* const cv = GvCV(gv);
760 if (!CvROOT(cv) && !CvXSUB(cv)) {
768 if (GvCV(stubgv) != cv) /* orphaned import */
771 autogv = gv_autoload4(GvSTASH(stubgv),
772 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
782 Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
790 const char *packname = "";
791 STRLEN packname_len = 0;
793 PERL_ARGS_ASSERT_GV_AUTOLOAD4;
795 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
798 if (SvTYPE(stash) < SVt_PVHV) {
799 packname = SvPV_const(MUTABLE_SV(stash), packname_len);
803 packname = HvNAME_get(stash);
804 packname_len = HvNAMELEN_get(stash);
807 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
811 if (!(CvROOT(cv) || CvXSUB(cv)))
815 * Inheriting AUTOLOAD for non-methods works ... for now.
817 if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
819 Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
820 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
821 packname, (int)len, name);
824 /* rather than lookup/init $AUTOLOAD here
825 * only to have the XSUB do another lookup for $AUTOLOAD
826 * and split that value on the last '::',
827 * pass along the same data via some unused fields in the CV
829 CvSTASH_set(cv, stash);
830 SvPV_set(cv, (char *)name); /* cast to lose constness warning */
836 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
837 * The subroutine's original name may not be "AUTOLOAD", so we don't
838 * use that, but for lack of anything better we will use the sub's
839 * original package to look up $AUTOLOAD.
841 varstash = GvSTASH(CvGV(cv));
842 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
846 gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
847 #ifdef PERL_DONT_CREATE_GVSV
848 GvSV(vargv) = newSV(0);
852 varsv = GvSVn(vargv);
853 sv_setpvn(varsv, packname, packname_len);
854 sv_catpvs(varsv, "::");
855 sv_catpvn(varsv, name, len);
860 /* require_tie_mod() internal routine for requiring a module
861 * that implements the logic of automatic ties like %! and %-
863 * The "gv" parameter should be the glob.
864 * "varpv" holds the name of the var, used for error messages.
865 * "namesv" holds the module name. Its refcount will be decremented.
866 * "methpv" holds the method name to test for to check that things
867 * are working reasonably close to as expected.
868 * "flags": if flag & 1 then save the scalar before loading.
869 * For the protection of $! to work (it is set by this routine)
870 * the sv slot must already be magicalized.
873 S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
876 HV* stash = gv_stashsv(namesv, 0);
878 PERL_ARGS_ASSERT_REQUIRE_TIE_MOD;
880 if (!stash || !(gv_fetchmethod(stash, methpv))) {
881 SV *module = newSVsv(namesv);
882 char varname = *varpv; /* varpv might be clobbered by load_module,
883 so save it. For the moment it's always
889 PUSHSTACKi(PERLSI_MAGIC);
890 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
894 stash = gv_stashsv(namesv, 0);
896 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available",
897 varname, SVfARG(namesv));
898 else if (!gv_fetchmethod(stash, methpv))
899 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s",
900 varname, SVfARG(namesv), methpv);
902 SvREFCNT_dec(namesv);
907 =for apidoc gv_stashpv
909 Returns a pointer to the stash for a specified package. Uses C<strlen> to
910 determine the length of C<name>, then calls C<gv_stashpvn()>.
916 Perl_gv_stashpv(pTHX_ const char *name, I32 create)
918 PERL_ARGS_ASSERT_GV_STASHPV;
919 return gv_stashpvn(name, strlen(name), create);
923 =for apidoc gv_stashpvn
925 Returns a pointer to the stash for a specified package. The C<namelen>
926 parameter indicates the length of the C<name>, in bytes. C<flags> is passed
927 to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be
928 created if it does not already exist. If the package does not exist and
929 C<flags> is 0 (or any other setting that does not create packages) then NULL
937 Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
943 U32 tmplen = namelen + 2;
945 PERL_ARGS_ASSERT_GV_STASHPVN;
947 if (tmplen <= sizeof smallbuf)
950 Newx(tmpbuf, tmplen, char);
951 Copy(name, tmpbuf, namelen, char);
952 tmpbuf[namelen] = ':';
953 tmpbuf[namelen+1] = ':';
954 tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV);
955 if (tmpbuf != smallbuf)
961 assert(HvNAME_get(stash));
966 =for apidoc gv_stashsv
968 Returns a pointer to the stash for a specified package. See C<gv_stashpvn>.
974 Perl_gv_stashsv(pTHX_ SV *sv, I32 flags)
977 const char * const ptr = SvPV_const(sv,len);
979 PERL_ARGS_ASSERT_GV_STASHSV;
981 return gv_stashpvn(ptr, len, flags);
986 Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) {
987 PERL_ARGS_ASSERT_GV_FETCHPV;
988 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
992 Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) {
994 const char * const nambeg = SvPV_const(name, len);
995 PERL_ARGS_ASSERT_GV_FETCHSV;
996 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
1000 S_gv_magicalize_isa(pTHX_ GV *gv)
1004 PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA;
1008 sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
1013 S_gv_magicalize_overload(pTHX_ GV *gv)
1017 PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD;
1021 hv_magic(hv, NULL, PERL_MAGIC_overload);
1025 Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
1026 const svtype sv_type)
1029 register const char *name = nambeg;
1030 register GV *gv = NULL;
1033 register const char *name_cursor;
1035 const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
1036 const I32 no_expand = flags & GV_NOEXPAND;
1037 const I32 add = flags & ~GV_NOADD_MASK;
1038 const char *const name_end = nambeg + full_len;
1039 const char *const name_em1 = name_end - 1;
1042 PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS;
1044 if (flags & GV_NOTQUAL) {
1045 /* Caller promised that there is no stash, so we can skip the check. */
1050 if (full_len > 2 && *name == '*' && isALPHA(name[1])) {
1051 /* accidental stringify on a GV? */
1055 for (name_cursor = name; name_cursor < name_end; name_cursor++) {
1056 if ((*name_cursor == ':' && name_cursor < name_em1
1057 && name_cursor[1] == ':')
1058 || (*name_cursor == '\'' && name_cursor[1]))
1061 stash = PL_defstash;
1062 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
1065 len = name_cursor - name;
1068 if (*name_cursor == ':') {
1073 Newx(tmpbuf, len+2, char);
1074 Copy(name, tmpbuf, len, char);
1075 tmpbuf[len++] = ':';
1076 tmpbuf[len++] = ':';
1079 gvp = (GV**)hv_fetch(stash, key, len, add);
1080 gv = gvp ? *gvp : NULL;
1081 if (gv && gv != (const GV *)&PL_sv_undef) {
1082 if (SvTYPE(gv) != SVt_PVGV)
1083 gv_init(gv, stash, key, len, (add & GV_ADDMULTI));
1088 Safefree((char *)key);
1089 if (!gv || gv == (const GV *)&PL_sv_undef)
1092 if (!(stash = GvHV(gv)))
1094 stash = GvHV(gv) = newHV();
1095 if (!HvNAME_get(stash)) {
1096 hv_name_set(stash, nambeg, name_cursor-nambeg, 0);
1097 /* If the containing stash has multiple effective
1098 names, see that this one gets them, too. */
1099 if (HvAUX(GvSTASH(gv))->xhv_name_count)
1100 mro_package_moved(stash, NULL, gv, 1);
1103 else if (!HvNAME_get(stash))
1104 hv_name_set(stash, nambeg, name_cursor - nambeg, 0);
1107 if (*name_cursor == ':')
1111 if (name == name_end)
1113 ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE));
1116 len = name_cursor - name;
1118 /* No stash in name, so see how we can default */
1122 if (len && isIDFIRST_lazy(name)) {
1123 bool global = FALSE;
1131 if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
1132 || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
1133 || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
1137 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1142 if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
1143 && name[3] == 'I' && name[4] == 'N')
1147 if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
1148 &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
1149 ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
1153 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1154 && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
1161 stash = PL_defstash;
1162 else if (IN_PERL_COMPILETIME) {
1163 stash = PL_curstash;
1164 if (add && (PL_hints & HINT_STRICT_VARS) &&
1165 sv_type != SVt_PVCV &&
1166 sv_type != SVt_PVGV &&
1167 sv_type != SVt_PVFM &&
1168 sv_type != SVt_PVIO &&
1169 !(len == 1 && sv_type == SVt_PV &&
1170 (*name == 'a' || *name == 'b')) )
1172 gvp = (GV**)hv_fetch(stash,name,len,0);
1174 *gvp == (const GV *)&PL_sv_undef ||
1175 SvTYPE(*gvp) != SVt_PVGV)
1179 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
1180 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
1181 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
1183 /* diag_listed_as: Variable "%s" is not imported%s */
1185 aTHX_ packWARN(WARN_MISC),
1186 "Variable \"%c%s\" is not imported",
1187 sv_type == SVt_PVAV ? '@' :
1188 sv_type == SVt_PVHV ? '%' : '$',
1192 aTHX_ packWARN(WARN_MISC),
1193 "\t(Did you mean &%s instead?)\n", name
1200 stash = CopSTASH(PL_curcop);
1203 stash = PL_defstash;
1206 /* By this point we should have a stash and a name */
1210 SV * const err = Perl_mess(aTHX_
1211 "Global symbol \"%s%s\" requires explicit package name",
1212 (sv_type == SVt_PV ? "$"
1213 : sv_type == SVt_PVAV ? "@"
1214 : sv_type == SVt_PVHV ? "%"
1217 if (USE_UTF8_IN_NAMES)
1220 gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV);
1222 /* symbol table under destruction */
1231 if (!SvREFCNT(stash)) /* symbol table under destruction */
1234 gvp = (GV**)hv_fetch(stash,name,len,add);
1235 if (!gvp || *gvp == (const GV *)&PL_sv_undef)
1238 if (SvTYPE(gv) == SVt_PVGV) {
1241 gv_init_sv(gv, sv_type);
1242 if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) {
1244 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1245 else if (*name == '-' || *name == '+')
1246 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1248 else if (len == 3 && sv_type == SVt_PVAV
1249 && strnEQ(name, "ISA", 3)
1250 && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv))))
1251 gv_magicalize_isa(gv);
1254 } else if (no_init) {
1256 } else if (no_expand && SvROK(gv)) {
1260 /* Adding a new symbol.
1261 Unless of course there was already something non-GV here, in which case
1262 we want to behave as if there was always a GV here, containing some sort
1264 Otherwise we run the risk of creating things like GvIO, which can cause
1265 subtle bugs. eg the one that tripped up SQL::Translator */
1267 faking_it = SvOK(gv);
1269 if (add & GV_ADDWARN)
1270 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
1271 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
1272 gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type);
1274 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
1275 : (PL_dowarn & G_WARN_ON ) ) )
1278 /* set up magic where warranted */
1279 if (stash != PL_defstash) { /* not the main stash */
1280 /* We only have to check for four names here: EXPORT, ISA, OVERLOAD
1281 and VERSION. All the others apply only to the main stash. */
1283 const char * const name2 = name + 1;
1286 if (strnEQ(name2, "XPORT", 5))
1290 if (strEQ(name2, "SA"))
1291 gv_magicalize_isa(gv);
1294 if (strEQ(name2, "VERLOAD"))
1295 gv_magicalize_overload(gv);
1298 if (strEQ(name2, "ERSION"))
1308 /* Nothing else to do.
1309 The compiler will probably turn the switch statement into a
1310 branch table. Make sure we avoid even that small overhead for
1311 the common case of lower case variable names. */
1315 const char * const name2 = name + 1;
1318 if (strEQ(name2, "RGV")) {
1319 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
1321 else if (strEQ(name2, "RGVOUT")) {
1326 if (strnEQ(name2, "XPORT", 5))
1330 if (strEQ(name2, "SA")) {
1331 gv_magicalize_isa(gv);
1335 if (strEQ(name2, "VERLOAD")) {
1336 gv_magicalize_overload(gv);
1340 if (strEQ(name2, "IG")) {
1343 if (!PL_psig_name) {
1344 Newxz(PL_psig_name, 2 * SIG_SIZE, SV*);
1345 Newxz(PL_psig_pend, SIG_SIZE, int);
1346 PL_psig_ptr = PL_psig_name + SIG_SIZE;
1348 /* I think that the only way to get here is to re-use an
1349 embedded perl interpreter, where the previous
1350 use didn't clean up fully because
1351 PL_perl_destruct_level was 0. I'm not sure that we
1352 "support" that, in that I suspect in that scenario
1353 there are sufficient other garbage values left in the
1354 interpreter structure that something else will crash
1355 before we get here. I suspect that this is one of
1356 those "doctor, it hurts when I do this" bugs. */
1357 Zero(PL_psig_name, 2 * SIG_SIZE, SV*);
1358 Zero(PL_psig_pend, SIG_SIZE, int);
1362 hv_magic(hv, NULL, PERL_MAGIC_sig);
1363 for (i = 1; i < SIG_SIZE; i++) {
1364 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
1366 sv_setsv(*init, &PL_sv_undef);
1371 if (strEQ(name2, "ERSION"))
1374 case '\003': /* $^CHILD_ERROR_NATIVE */
1375 if (strEQ(name2, "HILD_ERROR_NATIVE"))
1378 case '\005': /* $^ENCODING */
1379 if (strEQ(name2, "NCODING"))
1382 case '\007': /* $^GLOBAL_PHASE */
1383 if (strEQ(name2, "LOBAL_PHASE"))
1386 case '\015': /* $^MATCH */
1387 if (strEQ(name2, "ATCH"))
1389 case '\017': /* $^OPEN */
1390 if (strEQ(name2, "PEN"))
1393 case '\020': /* $^PREMATCH $^POSTMATCH */
1394 if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH"))
1397 case '\024': /* ${^TAINT} */
1398 if (strEQ(name2, "AINT"))
1401 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
1402 if (strEQ(name2, "NICODE"))
1404 if (strEQ(name2, "TF8LOCALE"))
1406 if (strEQ(name2, "TF8CACHE"))
1409 case '\027': /* $^WARNING_BITS */
1410 if (strEQ(name2, "ARNING_BITS"))
1423 /* Ensures that we have an all-digit variable, ${"1foo"} fails
1425 /* This snippet is taken from is_gv_magical */
1426 const char *end = name + len;
1427 while (--end > name) {
1428 if (!isDIGIT(*end)) return gv;
1435 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1436 be case '\0' in this switch statement (ie a default case) */
1442 sv_type == SVt_PVAV ||
1443 sv_type == SVt_PVHV ||
1444 sv_type == SVt_PVCV ||
1445 sv_type == SVt_PVFM ||
1448 PL_sawampersand = TRUE;
1452 sv_setpv(GvSVn(gv),PL_chopset);
1456 #ifdef COMPLEX_STATUS
1457 SvUPGRADE(GvSVn(gv), SVt_PVLV);
1463 /* If %! has been used, automatically load Errno.pm. */
1465 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1467 /* magicalization must be done before require_tie_mod is called */
1468 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1469 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1474 GvMULTI_on(gv); /* no used once warnings here */
1476 AV* const av = GvAVn(gv);
1477 SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL;
1479 sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0);
1480 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1482 SvREADONLY_on(GvSVn(gv));
1485 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1486 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1492 if (sv_type == SVt_PV)
1493 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1494 "$%c is no longer supported", *name);
1497 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1500 case '\010': /* $^H */
1502 HV *const hv = GvHVn(gv);
1503 hv_magic(hv, NULL, PERL_MAGIC_hints);
1506 case '\023': /* $^S */
1508 SvREADONLY_on(GvSVn(gv));
1532 case '\001': /* $^A */
1533 case '\003': /* $^C */
1534 case '\004': /* $^D */
1535 case '\005': /* $^E */
1536 case '\006': /* $^F */
1537 case '\011': /* $^I, NOT \t in EBCDIC */
1538 case '\016': /* $^N */
1539 case '\017': /* $^O */
1540 case '\020': /* $^P */
1541 case '\024': /* $^T */
1542 case '\027': /* $^W */
1544 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1547 case '\014': /* $^L */
1548 sv_setpvs(GvSVn(gv),"\f");
1549 PL_formfeed = GvSVn(gv);
1552 sv_setpvs(GvSVn(gv),"\034");
1556 SV * const sv = GvSVn(gv);
1557 if (!sv_derived_from(PL_patchlevel, "version"))
1558 upg_version(PL_patchlevel, TRUE);
1559 GvSV(gv) = vnumify(PL_patchlevel);
1560 SvREADONLY_on(GvSV(gv));
1564 case '\026': /* $^V */
1566 SV * const sv = GvSVn(gv);
1567 GvSV(gv) = new_version(PL_patchlevel);
1568 SvREADONLY_on(GvSV(gv));
1578 Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1582 const HV * const hv = GvSTASH(gv);
1584 PERL_ARGS_ASSERT_GV_FULLNAME4;
1590 sv_setpv(sv, prefix ? prefix : "");
1592 name = HvNAME_get(hv);
1594 namelen = HvNAMELEN_get(hv);
1600 if (keepmain || strNE(name, "main")) {
1601 sv_catpvn(sv,name,namelen);
1604 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1608 Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1610 const GV * const egv = GvEGVx(gv);
1612 PERL_ARGS_ASSERT_GV_EFULLNAME4;
1614 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
1618 Perl_gv_check(pTHX_ const HV *stash)
1623 PERL_ARGS_ASSERT_GV_CHECK;
1625 if (!HvARRAY(stash))
1627 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1629 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1632 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1633 (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
1635 if (hv != PL_defstash && hv != stash)
1636 gv_check(hv); /* nested package */
1638 else if (isALPHA(*HeKEY(entry))) {
1640 gv = MUTABLE_GV(HeVAL(entry));
1641 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1644 CopLINE_set(PL_curcop, GvLINE(gv));
1646 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1648 CopFILEGV(PL_curcop)
1649 = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0);
1651 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1652 "Name \"%s::%s\" used only once: possible typo",
1653 HvNAME_get(stash), GvNAME(gv));
1660 Perl_newGVgen(pTHX_ const char *pack)
1664 PERL_ARGS_ASSERT_NEWGVGEN;
1666 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1670 /* hopefully this is only called on local symbol table entries */
1673 Perl_gp_ref(pTHX_ GP *gp)
1681 /* If the GP they asked for a reference to contains
1682 a method cache entry, clear it first, so that we
1683 don't infect them with our cached entry */
1684 SvREFCNT_dec(gp->gp_cv);
1693 Perl_gp_free(pTHX_ GV *gv)
1698 if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
1700 if (gp->gp_refcnt == 0) {
1701 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1702 "Attempt to free unreferenced glob pointers"
1703 pTHX__FORMAT pTHX__VALUE);
1706 if (--gp->gp_refcnt > 0) {
1707 if (gp->gp_egv == gv)
1713 if (gp->gp_file_hek)
1714 unshare_hek(gp->gp_file_hek);
1715 SvREFCNT_dec(gp->gp_sv);
1716 SvREFCNT_dec(gp->gp_av);
1717 /* FIXME - another reference loop GV -> symtab -> GV ?
1718 Somehow gp->gp_hv can end up pointing at freed garbage. */
1719 if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
1720 const char *hvname = HvNAME_get(gp->gp_hv);
1721 if (PL_stashcache && hvname)
1722 (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
1724 SvREFCNT_dec(gp->gp_hv);
1726 SvREFCNT_dec(gp->gp_io);
1727 SvREFCNT_dec(gp->gp_cv);
1728 SvREFCNT_dec(gp->gp_form);
1735 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1737 AMT * const amtp = (AMT*)mg->mg_ptr;
1738 PERL_UNUSED_ARG(sv);
1740 PERL_ARGS_ASSERT_MAGIC_FREEOVRLD;
1742 if (amtp && AMT_AMAGIC(amtp)) {
1744 for (i = 1; i < NofAMmeth; i++) {
1745 CV * const cv = amtp->table[i];
1747 SvREFCNT_dec(MUTABLE_SV(cv));
1748 amtp->table[i] = NULL;
1755 /* Updates and caches the CV's */
1757 * 1 on success and there is some overload
1758 * 0 if there is no overload
1759 * -1 if some error occurred and it couldn't croak
1763 Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing)
1766 MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1768 const struct mro_meta* stash_meta = HvMROMETA(stash);
1771 PERL_ARGS_ASSERT_GV_AMUPDATE;
1773 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1775 const AMT * const amtp = (AMT*)mg->mg_ptr;
1776 if (amtp->was_ok_am == PL_amagic_generation
1777 && amtp->was_ok_sub == newgen) {
1778 return AMT_OVERLOADED(amtp) ? 1 : 0;
1780 sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table);
1783 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
1786 amt.was_ok_am = PL_amagic_generation;
1787 amt.was_ok_sub = newgen;
1788 amt.fallback = AMGfallNO;
1792 int filled = 0, have_ovl = 0;
1795 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1797 /* Try to find via inheritance. */
1798 GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1799 SV * const sv = gv ? GvSV(gv) : NULL;
1803 lim = DESTROY_amg; /* Skip overloading entries. */
1804 #ifdef PERL_DONT_CREATE_GVSV
1806 NOOP; /* Equivalent to !SvTRUE and !SvOK */
1809 else if (SvTRUE(sv))
1810 amt.fallback=AMGfallYES;
1812 amt.fallback=AMGfallNEVER;
1814 for (i = 1; i < lim; i++)
1815 amt.table[i] = NULL;
1816 for (; i < NofAMmeth; i++) {
1817 const char * const cooky = PL_AMG_names[i];
1818 /* Human-readable form, for debugging: */
1819 const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1820 const STRLEN l = PL_AMG_namelens[i];
1822 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
1823 cp, HvNAME_get(stash)) );
1824 /* don't fill the cache while looking up!
1825 Creation of inheritance stubs in intermediate packages may
1826 conflict with the logic of runtime method substitution.
1827 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1828 then we could have created stubs for "(+0" in A and C too.
1829 But if B overloads "bool", we may want to use it for
1830 numifying instead of C's "+0". */
1831 if (i >= DESTROY_amg)
1832 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1833 else /* Autoload taken care of below */
1834 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1836 if (gv && (cv = GvCV(gv))) {
1838 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1839 && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
1840 /* This is a hack to support autoloading..., while
1841 knowing *which* methods were declared as overloaded. */
1842 /* GvSV contains the name of the method. */
1844 SV *gvsv = GvSV(gv);
1846 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
1847 "\" for overloaded \"%s\" in package \"%.256s\"\n",
1848 (void*)GvSV(gv), cp, hvname) );
1849 if (!gvsv || !SvPOK(gvsv)
1850 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
1853 /* Can be an import stub (created by "can"). */
1858 const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
1859 Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
1860 "in package \"%.256s\"",
1861 (GvCVGEN(gv) ? "Stub found while resolving"
1866 cv = GvCV(gv = ngv);
1868 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
1869 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
1870 GvNAME(CvGV(cv))) );
1872 if (i < DESTROY_amg)
1874 } else if (gv) { /* Autoloaded... */
1875 cv = MUTABLE_CV(gv);
1878 amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv));
1881 AMT_AMAGIC_on(&amt);
1883 AMT_OVERLOADED_on(&amt);
1884 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1885 (char*)&amt, sizeof(AMT));
1889 /* Here we have no table: */
1891 AMT_AMAGIC_off(&amt);
1892 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1893 (char*)&amt, sizeof(AMTS));
1899 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1905 struct mro_meta* stash_meta;
1907 if (!stash || !HvNAME_get(stash))
1910 stash_meta = HvMROMETA(stash);
1911 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1913 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1916 /* If we're looking up a destructor to invoke, we must avoid
1917 * that Gv_AMupdate croaks, because we might be dying already */
1918 if (Gv_AMupdate(stash, cBOOL(id == DESTROY_amg)) == -1) {
1919 /* and if it didn't found a destructor, we fall back
1920 * to a simpler method that will only look for the
1921 * destructor instead of the whole magic */
1922 if (id == DESTROY_amg) {
1923 GV * const gv = gv_fetchmethod(stash, "DESTROY");
1929 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1932 amtp = (AMT*)mg->mg_ptr;
1933 if ( amtp->was_ok_am != PL_amagic_generation
1934 || amtp->was_ok_sub != newgen )
1936 if (AMT_AMAGIC(amtp)) {
1937 CV * const ret = amtp->table[id];
1938 if (ret && isGV(ret)) { /* Autoloading stab */
1939 /* Passing it through may have resulted in a warning
1940 "Inherited AUTOLOAD for a non-method deprecated", since
1941 our caller is going through a function call, not a method call.
1942 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1943 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
1955 /* Implement tryAMAGICun_MG macro.
1956 Do get magic, then see if the stack arg is overloaded and if so call it.
1958 AMGf_set return the arg using SETs rather than assigning to
1960 AMGf_numeric apply sv_2num to the stack arg.
1964 Perl_try_amagic_un(pTHX_ int method, int flags) {
1968 SV* const arg = TOPs;
1972 if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method,
1973 AMGf_noright | AMGf_unary))) {
1974 if (flags & AMGf_set) {
1979 if (SvPADMY(TARG)) {
1980 sv_setsv(TARG, tmpsv);
1990 if ((flags & AMGf_numeric) && SvROK(arg))
1996 /* Implement tryAMAGICbin_MG macro.
1997 Do get magic, then see if the two stack args are overloaded and if so
2000 AMGf_set return the arg using SETs rather than assigning to
2002 AMGf_assign op may be called as mutator (eg +=)
2003 AMGf_numeric apply sv_2num to the stack arg.
2007 Perl_try_amagic_bin(pTHX_ int method, int flags) {
2010 SV* const left = TOPm1s;
2011 SV* const right = TOPs;
2017 if (SvAMAGIC(left) || SvAMAGIC(right)) {
2018 SV * const tmpsv = amagic_call(left, right, method,
2019 ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0));
2021 if (flags & AMGf_set) {
2028 if (opASSIGN || SvPADMY(TARG)) {
2029 sv_setsv(TARG, tmpsv);
2039 if (flags & AMGf_numeric) {
2041 *(sp-1) = sv_2num(left);
2043 *sp = sv_2num(right);
2049 Perl_amagic_deref_call(pTHX_ SV *ref, int method) {
2052 PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL;
2054 while (SvAMAGIC(ref) &&
2055 (tmpsv = amagic_call(ref, &PL_sv_undef, method,
2056 AMGf_noright | AMGf_unary))) {
2058 Perl_croak(aTHX_ "Overloaded dereference did not return a reference");
2059 if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) {
2060 /* Bail out if it returns us the same reference. */
2065 return tmpsv ? tmpsv : ref;
2069 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
2074 CV **cvp=NULL, **ocvp=NULL;
2075 AMT *amtp=NULL, *oamtp=NULL;
2076 int off = 0, off1, lr = 0, notfound = 0;
2077 int postpr = 0, force_cpy = 0;
2078 int assign = AMGf_assign & flags;
2079 const int assignshift = assign ? 1 : 0;
2080 int use_default_op = 0;
2086 PERL_ARGS_ASSERT_AMAGIC_CALL;
2088 if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) {
2089 SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0);
2091 if ( !lex_mask || !SvOK(lex_mask) )
2092 /* overloading lexically disabled */
2094 else if ( lex_mask && SvPOK(lex_mask) ) {
2095 /* we have an entry in the hints hash, check if method has been
2096 * masked by overloading.pm */
2098 const int offset = method / 8;
2099 const int bit = method % 8;
2100 char *pv = SvPV(lex_mask, len);
2102 /* Bit set, so this overloading operator is disabled */
2103 if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) )
2108 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
2109 && (stash = SvSTASH(SvRV(left)))
2110 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2111 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2112 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
2114 && ((cv = cvp[off=method+assignshift])
2115 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
2121 cv = cvp[off=method])))) {
2122 lr = -1; /* Call method for left argument */
2124 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
2127 /* look for substituted methods */
2128 /* In all the covered cases we should be called with assign==0. */
2132 if ((cv = cvp[off=add_ass_amg])
2133 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
2134 right = &PL_sv_yes; lr = -1; assign = 1;
2139 if ((cv = cvp[off = subtr_ass_amg])
2140 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
2141 right = &PL_sv_yes; lr = -1; assign = 1;
2145 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
2148 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
2151 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
2154 (void)((cv = cvp[off=bool__amg])
2155 || (cv = cvp[off=numer_amg])
2156 || (cv = cvp[off=string_amg]));
2163 * SV* ref causes confusion with the interpreter variable of
2166 SV* const tmpRef=SvRV(left);
2167 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
2169 * Just to be extra cautious. Maybe in some
2170 * additional cases sv_setsv is safe, too.
2172 SV* const newref = newSVsv(tmpRef);
2173 SvOBJECT_on(newref);
2174 /* As a bit of a source compatibility hack, SvAMAGIC() and
2175 friends dereference an RV, to behave the same was as when
2176 overloading was stored on the reference, not the referant.
2177 Hence we can't use SvAMAGIC_on()
2179 SvFLAGS(newref) |= SVf_AMAGIC;
2180 SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef))));
2186 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
2187 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
2188 SV* const nullsv=sv_2mortal(newSViv(0));
2190 SV* const lessp = amagic_call(left,nullsv,
2191 lt_amg,AMGf_noright);
2192 logic = SvTRUE(lessp);
2194 SV* const lessp = amagic_call(left,nullsv,
2195 ncmp_amg,AMGf_noright);
2196 logic = (SvNV(lessp) < 0);
2199 if (off==subtr_amg) {
2210 if ((cv = cvp[off=subtr_amg])) {
2212 left = sv_2mortal(newSViv(0));
2217 case iter_amg: /* XXXX Eventually should do to_gv. */
2218 case ftest_amg: /* XXXX Eventually should do to_gv. */
2221 return NULL; /* Delegate operation to standard mechanisms. */
2229 return left; /* Delegate operation to standard mechanisms. */
2234 if (!cv) goto not_found;
2235 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
2236 && (stash = SvSTASH(SvRV(right)))
2237 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2238 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2239 ? (amtp = (AMT*)mg->mg_ptr)->table
2241 && (cv = cvp[off=method])) { /* Method for right
2244 } else if (((cvp && amtp->fallback > AMGfallNEVER)
2245 || (ocvp && oamtp->fallback > AMGfallNEVER))
2246 && !(flags & AMGf_unary)) {
2247 /* We look for substitution for
2248 * comparison operations and
2250 if (method==concat_amg || method==concat_ass_amg
2251 || method==repeat_amg || method==repeat_ass_amg) {
2252 return NULL; /* Delegate operation to string conversion */
2274 if (ocvp && (oamtp->fallback > AMGfallNEVER)) {
2278 if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) {
2288 not_found: /* No method found, either report or croak */
2296 return left; /* Delegate operation to standard mechanisms. */
2299 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
2300 notfound = 1; lr = -1;
2301 } else if (cvp && (cv=cvp[nomethod_amg])) {
2302 notfound = 1; lr = 1;
2303 } else if ((use_default_op =
2304 (!ocvp || oamtp->fallback >= AMGfallYES)
2305 && (!cvp || amtp->fallback >= AMGfallYES))
2307 /* Skip generating the "no method found" message. */
2311 if (off==-1) off=method;
2312 msg = sv_2mortal(Perl_newSVpvf(aTHX_
2313 "Operation \"%s\": no method found,%sargument %s%s%s%s",
2314 AMG_id2name(method + assignshift),
2315 (flags & AMGf_unary ? " " : "\n\tleft "),
2317 "in overloaded package ":
2318 "has no overloaded magic",
2320 HvNAME_get(SvSTASH(SvRV(left))):
2323 ",\n\tright argument in overloaded package ":
2326 : ",\n\tright argument has no overloaded magic"),
2328 HvNAME_get(SvSTASH(SvRV(right))):
2330 if (use_default_op) {
2331 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
2333 Perl_croak(aTHX_ "%"SVf, SVfARG(msg));
2337 force_cpy = force_cpy || assign;
2342 DEBUG_o(Perl_deb(aTHX_
2343 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n",
2345 method+assignshift==off? "" :
2347 method+assignshift==off? "" :
2348 AMG_id2name(method+assignshift),
2349 method+assignshift==off? "" : "\")",
2350 flags & AMGf_unary? "" :
2351 lr==1 ? " for right argument": " for left argument",
2352 flags & AMGf_unary? " for argument" : "",
2353 stash ? HvNAME_get(stash) : "null",
2354 fl? ",\n\tassignment variant used": "") );
2357 /* Since we use shallow copy during assignment, we need
2358 * to dublicate the contents, probably calling user-supplied
2359 * version of copy operator
2361 /* We need to copy in following cases:
2362 * a) Assignment form was called.
2363 * assignshift==1, assign==T, method + 1 == off
2364 * b) Increment or decrement, called directly.
2365 * assignshift==0, assign==0, method + 0 == off
2366 * c) Increment or decrement, translated to assignment add/subtr.
2367 * assignshift==0, assign==T,
2369 * d) Increment or decrement, translated to nomethod.
2370 * assignshift==0, assign==0,
2372 * e) Assignment form translated to nomethod.
2373 * assignshift==1, assign==T, method + 1 != off
2376 /* off is method, method+assignshift, or a result of opcode substitution.
2377 * In the latter case assignshift==0, so only notfound case is important.
2379 if (( (method + assignshift == off)
2380 && (assign || (method == inc_amg) || (method == dec_amg)))
2383 /* newSVsv does not behave as advertised, so we copy missing
2384 * information by hand */
2385 SV *tmpRef = SvRV(left);
2387 if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) {
2388 SvRV_set(left, rv_copy);
2390 SvREFCNT_dec(tmpRef);
2398 const bool oldcatch = CATCH_GET;
2401 Zero(&myop, 1, BINOP);
2402 myop.op_last = (OP *) &myop;
2403 myop.op_next = NULL;
2404 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
2406 PUSHSTACKi(PERLSI_OVERLOAD);
2409 PL_op = (OP *) &myop;
2410 if (PERLDB_SUB && PL_curstash != PL_debstash)
2411 PL_op->op_private |= OPpENTERSUB_DB;
2413 Perl_pp_pushmark(aTHX);
2415 EXTEND(SP, notfound + 5);
2416 PUSHs(lr>0? right: left);
2417 PUSHs(lr>0? left: right);
2418 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
2420 PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift),
2421 AMG_id2namelen(method + assignshift), SVs_TEMP));
2423 PUSHs(MUTABLE_SV(cv));
2426 if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX)))
2434 CATCH_SET(oldcatch);
2441 ans=SvIV(res)<=0; break;
2444 ans=SvIV(res)<0; break;
2447 ans=SvIV(res)>=0; break;
2450 ans=SvIV(res)>0; break;
2453 ans=SvIV(res)==0; break;
2456 ans=SvIV(res)!=0; break;
2459 SvSetSV(left,res); return left;
2461 ans=!SvTRUE(res); break;
2466 } else if (method==copy_amg) {
2468 Perl_croak(aTHX_ "Copy method did not return a reference");
2470 return SvREFCNT_inc(SvRV(res));
2478 =for apidoc is_gv_magical_sv
2480 Returns C<TRUE> if given the name of a magical GV.
2482 Currently only useful internally when determining if a GV should be
2483 created even in rvalue contexts.
2485 C<flags> is not used at present but available for future extension to
2486 allow selecting particular classes of magical variable.
2488 Currently assumes that C<name> is NUL terminated (as well as len being valid).
2489 This assumption is met by all callers within the perl core, which all pass
2490 pointers returned by SvPV.
2496 Perl_is_gv_magical_sv(pTHX_ SV *const name_sv, U32 flags)
2499 const char *const name = SvPV_const(name_sv, len);
2501 PERL_UNUSED_ARG(flags);
2502 PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV;
2505 const char * const name1 = name + 1;
2508 if (len == 3 && name[1] == 'S' && name[2] == 'A')
2512 if (len == 8 && strEQ(name1, "VERLOAD"))
2516 if (len == 3 && name[1] == 'I' && name[2] == 'G')
2519 /* Using ${^...} variables is likely to be sufficiently rare that
2520 it seems sensible to avoid the space hit of also checking the
2522 case '\017': /* ${^OPEN} */
2523 if (strEQ(name1, "PEN"))
2526 case '\024': /* ${^TAINT} */
2527 if (strEQ(name1, "AINT"))
2530 case '\025': /* ${^UNICODE} */
2531 if (strEQ(name1, "NICODE"))
2533 if (strEQ(name1, "TF8LOCALE"))
2536 case '\027': /* ${^WARNING_BITS} */
2537 if (strEQ(name1, "ARNING_BITS"))
2550 const char *end = name + len;
2551 while (--end > name) {
2559 /* Because we're already assuming that name is NUL terminated
2560 below, we can treat an empty name as "\0" */
2586 case '\001': /* $^A */
2587 case '\003': /* $^C */
2588 case '\004': /* $^D */
2589 case '\005': /* $^E */
2590 case '\006': /* $^F */
2591 case '\010': /* $^H */
2592 case '\011': /* $^I, NOT \t in EBCDIC */
2593 case '\014': /* $^L */
2594 case '\016': /* $^N */
2595 case '\017': /* $^O */
2596 case '\020': /* $^P */
2597 case '\023': /* $^S */
2598 case '\024': /* $^T */
2599 case '\026': /* $^V */
2600 case '\027': /* $^W */
2620 Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
2625 PERL_ARGS_ASSERT_GV_NAME_SET;
2626 PERL_UNUSED_ARG(flags);
2629 Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
2631 if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
2632 unshare_hek(GvNAME_HEK(gv));
2635 PERL_HASH(hash, name, len);
2636 GvNAME_HEK(gv) = share_hek(name, len, hash);
2640 =for apidoc gv_try_downgrade
2642 If the typeglob C<gv> can be expressed more succinctly, by having
2643 something other than a real GV in its place in the stash, replace it
2644 with the optimised form. Basic requirements for this are that C<gv>
2645 is a real typeglob, is sufficiently ordinary, and is only referenced
2646 from its package. This function is meant to be used when a GV has been
2647 looked up in part to see what was there, causing upgrading, but based
2648 on what was found it turns out that the real GV isn't required after all.
2650 If C<gv> is a completely empty typeglob, it is deleted from the stash.
2652 If C<gv> is a typeglob containing only a sufficiently-ordinary constant
2653 sub, the typeglob is replaced with a scalar-reference placeholder that
2654 more compactly represents the same thing.
2660 Perl_gv_try_downgrade(pTHX_ GV *gv)
2666 PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
2668 /* XXX Why and where does this leave dangling pointers during global
2670 if (PL_phase == PERL_PHASE_DESTRUCT) return;
2672 if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
2673 !SvOBJECT(gv) && !SvREADONLY(gv) &&
2674 isGV_with_GP(gv) && GvGP(gv) &&
2675 !GvINTRO(gv) && GvREFCNT(gv) == 1 &&
2676 !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
2677 GvEGVx(gv) == gv && (stash = GvSTASH(gv))))
2679 if (SvMAGICAL(gv)) {
2681 /* only backref magic is allowed */
2682 if (SvGMAGICAL(gv) || SvSMAGICAL(gv))
2684 for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) {
2685 if (mg->mg_type != PERL_MAGIC_backref)
2691 HEK *gvnhek = GvNAME_HEK(gv);
2692 (void)hv_delete(stash, HEK_KEY(gvnhek),
2693 HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD);
2694 } else if (GvMULTI(gv) && cv &&
2695 !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) &&
2696 CvSTASH(cv) == stash && CvGV(cv) == gv &&
2697 CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) &&
2698 !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) &&
2699 (namehek = GvNAME_HEK(gv)) &&
2700 (gvp = hv_fetch(stash, HEK_KEY(namehek),
2701 HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) &&
2703 SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr);
2707 SvFLAGS(gv) = SVt_IV|SVf_ROK;
2708 SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) -
2709 STRUCT_OFFSET(XPVIV, xiv_iv));
2710 SvRV_set(gv, value);
2716 * c-indentation-style: bsd
2718 * indent-tabs-mode: t
2721 * ex: set ts=8 sts=4 sw=4 noet: