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(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(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(topgv) = cand_cv = NULL;
463 else if (GvCVGEN(topgv) == topgen_cmp) {
464 /* cache indicates no such method definitively */
469 packlen = HvNAMELEN_get(stash);
470 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
473 basestash = gv_stashpvn(hvname, packlen, GV_ADD);
474 linear_av = mro_get_linear_isa(basestash);
477 linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
480 linear_svp = AvARRAY(linear_av) + 1; /* skip over self */
481 items = AvFILLp(linear_av); /* no +1, to skip over self */
483 linear_sv = *linear_svp++;
485 cstash = gv_stashsv(linear_sv, 0);
488 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA",
489 SVfARG(linear_sv), hvname);
495 gvp = (GV**)hv_fetch(cstash, name, len, 0);
499 if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE);
500 if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) {
502 * Found real method, cache method in topgv if:
503 * 1. topgv has no synonyms (else inheritance crosses wires)
504 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
506 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
507 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
508 SvREFCNT_inc_simple_void_NN(cand_cv);
509 GvCV(topgv) = cand_cv;
510 GvCVGEN(topgv) = topgen_cmp;
516 /* Check UNIVERSAL without caching */
517 if(level == 0 || level == -1) {
518 candidate = gv_fetchmeth(NULL, name, len, 1);
520 cand_cv = GvCV(candidate);
521 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
522 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
523 SvREFCNT_inc_simple_void_NN(cand_cv);
524 GvCV(topgv) = cand_cv;
525 GvCVGEN(topgv) = topgen_cmp;
531 if (topgv && GvREFCNT(topgv) == 1) {
532 /* cache the fact that the method is not defined */
533 GvCVGEN(topgv) = topgen_cmp;
540 =for apidoc gv_fetchmeth_autoload
542 Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
543 Returns a glob for the subroutine.
545 For an autoloaded subroutine without a GV, will create a GV even
546 if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
547 of the result may be zero.
553 Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
555 GV *gv = gv_fetchmeth(stash, name, len, level);
557 PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD;
564 return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
565 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
567 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
570 if (!(CvROOT(cv) || CvXSUB(cv)))
572 /* Have an autoload */
573 if (level < 0) /* Cannot do without a stub */
574 gv_fetchmeth(stash, name, len, 0);
575 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
584 =for apidoc gv_fetchmethod_autoload
586 Returns the glob which contains the subroutine to call to invoke the method
587 on the C<stash>. In fact in the presence of autoloading this may be the
588 glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
591 The third parameter of C<gv_fetchmethod_autoload> determines whether
592 AUTOLOAD lookup is performed if the given method is not present: non-zero
593 means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
594 Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
595 with a non-zero C<autoload> parameter.
597 These functions grant C<"SUPER"> token as a prefix of the method name. Note
598 that if you want to keep the returned glob for a long time, you need to
599 check for it being "AUTOLOAD", since at the later time the call may load a
600 different subroutine due to $AUTOLOAD changing its value. Use the glob
601 created via a side effect to do this.
603 These functions have the same side-effects and as C<gv_fetchmeth> with
604 C<level==0>. C<name> should be writable if contains C<':'> or C<'
605 ''>. The warning against passing the GV returned by C<gv_fetchmeth> to
606 C<call_sv> apply equally to these functions.
612 S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen)
619 PERL_ARGS_ASSERT_GV_GET_SUPER_PKG;
621 stash = gv_stashpvn(name, namelen, 0);
622 if(stash) return stash;
624 /* If we must create it, give it an @ISA array containing
625 the real package this SUPER is for, so that it's tied
626 into the cache invalidation code correctly */
627 stash = gv_stashpvn(name, namelen, GV_ADD);
628 gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
630 gv_init(gv, stash, "ISA", 3, TRUE);
631 superisa = GvAVn(gv);
633 sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0);
635 av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0));
637 av_push(superisa, newSVhek(CopSTASH(PL_curcop)
638 ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL));
645 Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
647 PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD;
649 return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0);
652 /* Don't merge this yet, as it's likely to get a len parameter, and possibly
655 Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags)
658 register const char *nend;
659 const char *nsplit = NULL;
662 const char * const origname = name;
663 SV *const error_report = MUTABLE_SV(stash);
664 const U32 autoload = flags & GV_AUTOLOAD;
665 const U32 do_croak = flags & GV_CROAK;
667 PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS;
669 if (SvTYPE(stash) < SVt_PVHV)
672 /* The only way stash can become NULL later on is if nsplit is set,
673 which in turn means that there is no need for a SVt_PVHV case
674 the error reporting code. */
677 for (nend = name; *nend; nend++) {
682 else if (*nend == ':' && *(nend + 1) == ':') {
688 if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
689 /* ->SUPER::method should really be looked up in original stash */
690 SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
691 CopSTASHPV(PL_curcop)));
692 /* __PACKAGE__::SUPER stash should be autovivified */
693 stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr));
694 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
695 origname, HvNAME_get(stash), name) );
698 /* don't autovifify if ->NoSuchStash::method */
699 stash = gv_stashpvn(origname, nsplit - origname, 0);
701 /* however, explicit calls to Pkg::SUPER::method may
702 happen, and may require autovivification to work */
703 if (!stash && (nsplit - origname) >= 7 &&
704 strnEQ(nsplit - 7, "::SUPER", 7) &&
705 gv_stashpvn(origname, nsplit - origname - 7, 0))
706 stash = gv_get_super_pkg(origname, nsplit - origname);
711 gv = gv_fetchmeth(stash, name, nend - name, 0);
713 if (strEQ(name,"import") || strEQ(name,"unimport"))
714 gv = MUTABLE_GV(&PL_sv_yes);
716 gv = gv_autoload4(ostash, name, nend - name, TRUE);
717 if (!gv && do_croak) {
718 /* Right now this is exclusively for the benefit of S_method_common
721 /* If we can't find an IO::File method, it might be a call on
722 * a filehandle. If IO:File has not been loaded, try to
723 * require it first instead of croaking */
724 const char *stash_name = HvNAME_get(stash);
725 const char *io_file = "IO/File.pm";
726 if (stash_name && strEQ(stash_name,"IO::File")
727 && ! hv_exists(GvHVn(PL_incgv),io_file, strlen(io_file))
730 gv = gv_fetchmeth(stash, name, nend - name, 0);
735 "Can't locate object method \"%s\" via package \"%.*s\"",
736 name, (int)HvNAMELEN_get(stash), HvNAME_get(stash));
740 const char *packname;
743 packlen = nsplit - origname;
746 packname = SvPV_const(error_report, packlen);
750 "Can't locate object method \"%s\" via package \"%.*s\""
751 " (perhaps you forgot to load \"%.*s\"?)",
752 name, (int)packlen, packname, (int)packlen, packname);
757 CV* const cv = GvCV(gv);
758 if (!CvROOT(cv) && !CvXSUB(cv)) {
766 if (GvCV(stubgv) != cv) /* orphaned import */
769 autogv = gv_autoload4(GvSTASH(stubgv),
770 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
780 Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
788 const char *packname = "";
789 STRLEN packname_len = 0;
791 PERL_ARGS_ASSERT_GV_AUTOLOAD4;
793 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
796 if (SvTYPE(stash) < SVt_PVHV) {
797 packname = SvPV_const(MUTABLE_SV(stash), packname_len);
801 packname = HvNAME_get(stash);
802 packname_len = HvNAMELEN_get(stash);
805 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
809 if (!(CvROOT(cv) || CvXSUB(cv)))
813 * Inheriting AUTOLOAD for non-methods works ... for now.
815 if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
817 Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
818 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
819 packname, (int)len, name);
822 /* rather than lookup/init $AUTOLOAD here
823 * only to have the XSUB do another lookup for $AUTOLOAD
824 * and split that value on the last '::',
825 * pass along the same data via some unused fields in the CV
827 CvSTASH_set(cv, stash);
828 SvPV_set(cv, (char *)name); /* cast to lose constness warning */
834 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
835 * The subroutine's original name may not be "AUTOLOAD", so we don't
836 * use that, but for lack of anything better we will use the sub's
837 * original package to look up $AUTOLOAD.
839 varstash = GvSTASH(CvGV(cv));
840 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
844 gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
845 #ifdef PERL_DONT_CREATE_GVSV
846 GvSV(vargv) = newSV(0);
850 varsv = GvSVn(vargv);
851 sv_setpvn(varsv, packname, packname_len);
852 sv_catpvs(varsv, "::");
853 sv_catpvn(varsv, name, len);
858 /* require_tie_mod() internal routine for requiring a module
859 * that implements the logic of automatical ties like %! and %-
861 * The "gv" parameter should be the glob.
862 * "varpv" holds the name of the var, used for error messages.
863 * "namesv" holds the module name. Its refcount will be decremented.
864 * "methpv" holds the method name to test for to check that things
865 * are working reasonably close to as expected.
866 * "flags": if flag & 1 then save the scalar before loading.
867 * For the protection of $! to work (it is set by this routine)
868 * the sv slot must already be magicalized.
871 S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
874 HV* stash = gv_stashsv(namesv, 0);
876 PERL_ARGS_ASSERT_REQUIRE_TIE_MOD;
878 if (!stash || !(gv_fetchmethod(stash, methpv))) {
879 SV *module = newSVsv(namesv);
880 char varname = *varpv; /* varpv might be clobbered by load_module,
881 so save it. For the moment it's always
887 PUSHSTACKi(PERLSI_MAGIC);
888 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
892 stash = gv_stashsv(namesv, 0);
894 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available",
895 varname, SVfARG(namesv));
896 else if (!gv_fetchmethod(stash, methpv))
897 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s",
898 varname, SVfARG(namesv), methpv);
900 SvREFCNT_dec(namesv);
905 =for apidoc gv_stashpv
907 Returns a pointer to the stash for a specified package. Uses C<strlen> to
908 determine the length of C<name>, then calls C<gv_stashpvn()>.
914 Perl_gv_stashpv(pTHX_ const char *name, I32 create)
916 PERL_ARGS_ASSERT_GV_STASHPV;
917 return gv_stashpvn(name, strlen(name), create);
921 =for apidoc gv_stashpvn
923 Returns a pointer to the stash for a specified package. The C<namelen>
924 parameter indicates the length of the C<name>, in bytes. C<flags> is passed
925 to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be
926 created if it does not already exist. If the package does not exist and
927 C<flags> is 0 (or any other setting that does not create packages) then NULL
935 Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
941 U32 tmplen = namelen + 2;
943 PERL_ARGS_ASSERT_GV_STASHPVN;
945 if (tmplen <= sizeof smallbuf)
948 Newx(tmpbuf, tmplen, char);
949 Copy(name, tmpbuf, namelen, char);
950 tmpbuf[namelen] = ':';
951 tmpbuf[namelen+1] = ':';
952 tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV);
953 if (tmpbuf != smallbuf)
959 assert(HvNAME_get(stash));
964 =for apidoc gv_stashsv
966 Returns a pointer to the stash for a specified package. See C<gv_stashpvn>.
972 Perl_gv_stashsv(pTHX_ SV *sv, I32 flags)
975 const char * const ptr = SvPV_const(sv,len);
977 PERL_ARGS_ASSERT_GV_STASHSV;
979 return gv_stashpvn(ptr, len, flags);
984 Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) {
985 PERL_ARGS_ASSERT_GV_FETCHPV;
986 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
990 Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) {
992 const char * const nambeg = SvPV_const(name, len);
993 PERL_ARGS_ASSERT_GV_FETCHSV;
994 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
998 S_gv_magicalize_isa(pTHX_ GV *gv)
1002 PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA;
1006 sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
1011 S_gv_magicalize_overload(pTHX_ GV *gv)
1015 PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD;
1019 hv_magic(hv, NULL, PERL_MAGIC_overload);
1023 Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
1024 const svtype sv_type)
1027 register const char *name = nambeg;
1028 register GV *gv = NULL;
1031 register const char *name_cursor;
1033 const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
1034 const I32 no_expand = flags & GV_NOEXPAND;
1035 const I32 add = flags & ~GV_NOADD_MASK;
1036 const char *const name_end = nambeg + full_len;
1037 const char *const name_em1 = name_end - 1;
1040 PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS;
1042 if (flags & GV_NOTQUAL) {
1043 /* Caller promised that there is no stash, so we can skip the check. */
1048 if (full_len > 2 && *name == '*' && isALPHA(name[1])) {
1049 /* accidental stringify on a GV? */
1053 for (name_cursor = name; name_cursor < name_end; name_cursor++) {
1054 if ((*name_cursor == ':' && name_cursor < name_em1
1055 && name_cursor[1] == ':')
1056 || (*name_cursor == '\'' && name_cursor[1]))
1059 stash = PL_defstash;
1060 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
1063 len = name_cursor - name;
1066 if (*name_cursor == ':') {
1071 Newx(tmpbuf, len+2, char);
1072 Copy(name, tmpbuf, len, char);
1073 tmpbuf[len++] = ':';
1074 tmpbuf[len++] = ':';
1077 gvp = (GV**)hv_fetch(stash, key, len, add);
1078 gv = gvp ? *gvp : NULL;
1079 if (gv && gv != (const GV *)&PL_sv_undef) {
1080 if (SvTYPE(gv) != SVt_PVGV)
1081 gv_init(gv, stash, key, len, (add & GV_ADDMULTI));
1086 Safefree((char *)key);
1087 if (!gv || gv == (const GV *)&PL_sv_undef)
1090 if (!(stash = GvHV(gv)))
1092 stash = GvHV(gv) = newHV();
1093 if (!HvNAME_get(stash)) {
1094 hv_name_set(stash, nambeg, name_cursor-nambeg, 0);
1095 /* If the containing stash has multiple effective
1096 names, see that this one gets them, too. */
1097 if (HvAUX(GvSTASH(gv))->xhv_name_count)
1098 mro_package_moved(stash, NULL, gv, 1);
1101 else if (!HvNAME_get(stash))
1102 hv_name_set(stash, nambeg, name_cursor - nambeg, 0);
1105 if (*name_cursor == ':')
1109 if (name == name_end)
1111 ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE));
1114 len = name_cursor - name;
1116 /* No stash in name, so see how we can default */
1120 if (len && isIDFIRST_lazy(name)) {
1121 bool global = FALSE;
1129 if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
1130 || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
1131 || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
1135 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1140 if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
1141 && name[3] == 'I' && name[4] == 'N')
1145 if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
1146 &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
1147 ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
1151 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1152 && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
1159 stash = PL_defstash;
1160 else if (IN_PERL_COMPILETIME) {
1161 stash = PL_curstash;
1162 if (add && (PL_hints & HINT_STRICT_VARS) &&
1163 sv_type != SVt_PVCV &&
1164 sv_type != SVt_PVGV &&
1165 sv_type != SVt_PVFM &&
1166 sv_type != SVt_PVIO &&
1167 !(len == 1 && sv_type == SVt_PV &&
1168 (*name == 'a' || *name == 'b')) )
1170 gvp = (GV**)hv_fetch(stash,name,len,0);
1172 *gvp == (const GV *)&PL_sv_undef ||
1173 SvTYPE(*gvp) != SVt_PVGV)
1177 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
1178 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
1179 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
1181 /* diag_listed_as: Variable "%s" is not imported%s */
1183 aTHX_ packWARN(WARN_MISC),
1184 "Variable \"%c%s\" is not imported",
1185 sv_type == SVt_PVAV ? '@' :
1186 sv_type == SVt_PVHV ? '%' : '$',
1190 aTHX_ packWARN(WARN_MISC),
1191 "\t(Did you mean &%s instead?)\n", name
1198 stash = CopSTASH(PL_curcop);
1201 stash = PL_defstash;
1204 /* By this point we should have a stash and a name */
1208 SV * const err = Perl_mess(aTHX_
1209 "Global symbol \"%s%s\" requires explicit package name",
1210 (sv_type == SVt_PV ? "$"
1211 : sv_type == SVt_PVAV ? "@"
1212 : sv_type == SVt_PVHV ? "%"
1215 if (USE_UTF8_IN_NAMES)
1218 gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV);
1220 /* symbol table under destruction */
1229 if (!SvREFCNT(stash)) /* symbol table under destruction */
1232 gvp = (GV**)hv_fetch(stash,name,len,add);
1233 if (!gvp || *gvp == (const GV *)&PL_sv_undef)
1236 if (SvTYPE(gv) == SVt_PVGV) {
1239 gv_init_sv(gv, sv_type);
1240 if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) {
1242 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1243 else if (*name == '-' || *name == '+')
1244 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1246 else if (len == 3 && sv_type == SVt_PVAV
1247 && strnEQ(name, "ISA", 3)
1248 && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv))))
1249 gv_magicalize_isa(gv);
1252 } else if (no_init) {
1254 } else if (no_expand && SvROK(gv)) {
1258 /* Adding a new symbol.
1259 Unless of course there was already something non-GV here, in which case
1260 we want to behave as if there was always a GV here, containing some sort
1262 Otherwise we run the risk of creating things like GvIO, which can cause
1263 subtle bugs. eg the one that tripped up SQL::Translator */
1265 faking_it = SvOK(gv);
1267 if (add & GV_ADDWARN)
1268 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
1269 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
1270 gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type);
1272 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
1273 : (PL_dowarn & G_WARN_ON ) ) )
1276 /* set up magic where warranted */
1277 if (stash != PL_defstash) { /* not the main stash */
1278 /* We only have to check for four names here: EXPORT, ISA, OVERLOAD
1279 and VERSION. All the others apply only to the main stash. */
1281 const char * const name2 = name + 1;
1284 if (strnEQ(name2, "XPORT", 5))
1288 if (strEQ(name2, "SA"))
1289 gv_magicalize_isa(gv);
1292 if (strEQ(name2, "VERLOAD"))
1293 gv_magicalize_overload(gv);
1296 if (strEQ(name2, "ERSION"))
1306 /* Nothing else to do.
1307 The compiler will probably turn the switch statement into a
1308 branch table. Make sure we avoid even that small overhead for
1309 the common case of lower case variable names. */
1313 const char * const name2 = name + 1;
1316 if (strEQ(name2, "RGV")) {
1317 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
1319 else if (strEQ(name2, "RGVOUT")) {
1324 if (strnEQ(name2, "XPORT", 5))
1328 if (strEQ(name2, "SA")) {
1329 gv_magicalize_isa(gv);
1333 if (strEQ(name2, "VERLOAD")) {
1334 gv_magicalize_overload(gv);
1338 if (strEQ(name2, "IG")) {
1341 if (!PL_psig_name) {
1342 Newxz(PL_psig_name, 2 * SIG_SIZE, SV*);
1343 Newxz(PL_psig_pend, SIG_SIZE, int);
1344 PL_psig_ptr = PL_psig_name + SIG_SIZE;
1346 /* I think that the only way to get here is to re-use an
1347 embedded perl interpreter, where the previous
1348 use didn't clean up fully because
1349 PL_perl_destruct_level was 0. I'm not sure that we
1350 "support" that, in that I suspect in that scenario
1351 there are sufficient other garbage values left in the
1352 interpreter structure that something else will crash
1353 before we get here. I suspect that this is one of
1354 those "doctor, it hurts when I do this" bugs. */
1355 Zero(PL_psig_name, 2 * SIG_SIZE, SV*);
1356 Zero(PL_psig_pend, SIG_SIZE, int);
1360 hv_magic(hv, NULL, PERL_MAGIC_sig);
1361 for (i = 1; i < SIG_SIZE; i++) {
1362 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
1364 sv_setsv(*init, &PL_sv_undef);
1369 if (strEQ(name2, "ERSION"))
1372 case '\003': /* $^CHILD_ERROR_NATIVE */
1373 if (strEQ(name2, "HILD_ERROR_NATIVE"))
1376 case '\005': /* $^ENCODING */
1377 if (strEQ(name2, "NCODING"))
1380 case '\007': /* $^GLOBAL_PHASE */
1381 if (strEQ(name2, "LOBAL_PHASE"))
1384 case '\015': /* $^MATCH */
1385 if (strEQ(name2, "ATCH"))
1387 case '\017': /* $^OPEN */
1388 if (strEQ(name2, "PEN"))
1391 case '\020': /* $^PREMATCH $^POSTMATCH */
1392 if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH"))
1395 case '\024': /* ${^TAINT} */
1396 if (strEQ(name2, "AINT"))
1399 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
1400 if (strEQ(name2, "NICODE"))
1402 if (strEQ(name2, "TF8LOCALE"))
1404 if (strEQ(name2, "TF8CACHE"))
1407 case '\027': /* $^WARNING_BITS */
1408 if (strEQ(name2, "ARNING_BITS"))
1421 /* Ensures that we have an all-digit variable, ${"1foo"} fails
1423 /* This snippet is taken from is_gv_magical */
1424 const char *end = name + len;
1425 while (--end > name) {
1426 if (!isDIGIT(*end)) return gv;
1433 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1434 be case '\0' in this switch statement (ie a default case) */
1440 sv_type == SVt_PVAV ||
1441 sv_type == SVt_PVHV ||
1442 sv_type == SVt_PVCV ||
1443 sv_type == SVt_PVFM ||
1446 PL_sawampersand = TRUE;
1450 sv_setpv(GvSVn(gv),PL_chopset);
1454 #ifdef COMPLEX_STATUS
1455 SvUPGRADE(GvSVn(gv), SVt_PVLV);
1461 /* If %! has been used, automatically load Errno.pm. */
1463 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1465 /* magicalization must be done before require_tie_mod is called */
1466 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1467 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1472 GvMULTI_on(gv); /* no used once warnings here */
1474 AV* const av = GvAVn(gv);
1475 SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL;
1477 sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0);
1478 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1480 SvREADONLY_on(GvSVn(gv));
1483 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1484 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1490 if (sv_type == SVt_PV)
1491 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1492 "$%c is no longer supported", *name);
1495 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1498 case '\010': /* $^H */
1500 HV *const hv = GvHVn(gv);
1501 hv_magic(hv, NULL, PERL_MAGIC_hints);
1504 case '\023': /* $^S */
1506 SvREADONLY_on(GvSVn(gv));
1530 case '\001': /* $^A */
1531 case '\003': /* $^C */
1532 case '\004': /* $^D */
1533 case '\005': /* $^E */
1534 case '\006': /* $^F */
1535 case '\011': /* $^I, NOT \t in EBCDIC */
1536 case '\016': /* $^N */
1537 case '\017': /* $^O */
1538 case '\020': /* $^P */
1539 case '\024': /* $^T */
1540 case '\027': /* $^W */
1542 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1545 case '\014': /* $^L */
1546 sv_setpvs(GvSVn(gv),"\f");
1547 PL_formfeed = GvSVn(gv);
1550 sv_setpvs(GvSVn(gv),"\034");
1554 SV * const sv = GvSVn(gv);
1555 if (!sv_derived_from(PL_patchlevel, "version"))
1556 upg_version(PL_patchlevel, TRUE);
1557 GvSV(gv) = vnumify(PL_patchlevel);
1558 SvREADONLY_on(GvSV(gv));
1562 case '\026': /* $^V */
1564 SV * const sv = GvSVn(gv);
1565 GvSV(gv) = new_version(PL_patchlevel);
1566 SvREADONLY_on(GvSV(gv));
1576 Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1580 const HV * const hv = GvSTASH(gv);
1582 PERL_ARGS_ASSERT_GV_FULLNAME4;
1588 sv_setpv(sv, prefix ? prefix : "");
1590 name = HvNAME_get(hv);
1592 namelen = HvNAMELEN_get(hv);
1598 if (keepmain || strNE(name, "main")) {
1599 sv_catpvn(sv,name,namelen);
1602 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1606 Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1608 const GV * const egv = GvEGVx(gv);
1610 PERL_ARGS_ASSERT_GV_EFULLNAME4;
1612 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
1616 Perl_gv_check(pTHX_ const HV *stash)
1621 PERL_ARGS_ASSERT_GV_CHECK;
1623 if (!HvARRAY(stash))
1625 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1627 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1630 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1631 (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
1633 if (hv != PL_defstash && hv != stash)
1634 gv_check(hv); /* nested package */
1636 else if (isALPHA(*HeKEY(entry))) {
1638 gv = MUTABLE_GV(HeVAL(entry));
1639 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1642 CopLINE_set(PL_curcop, GvLINE(gv));
1644 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1646 CopFILEGV(PL_curcop)
1647 = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0);
1649 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1650 "Name \"%s::%s\" used only once: possible typo",
1651 HvNAME_get(stash), GvNAME(gv));
1658 Perl_newGVgen(pTHX_ const char *pack)
1662 PERL_ARGS_ASSERT_NEWGVGEN;
1664 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1668 /* hopefully this is only called on local symbol table entries */
1671 Perl_gp_ref(pTHX_ GP *gp)
1679 /* If the GP they asked for a reference to contains
1680 a method cache entry, clear it first, so that we
1681 don't infect them with our cached entry */
1682 SvREFCNT_dec(gp->gp_cv);
1691 Perl_gp_free(pTHX_ GV *gv)
1696 if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
1698 if (gp->gp_refcnt == 0) {
1699 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1700 "Attempt to free unreferenced glob pointers"
1701 pTHX__FORMAT pTHX__VALUE);
1704 if (--gp->gp_refcnt > 0) {
1705 if (gp->gp_egv == gv)
1711 if (gp->gp_file_hek)
1712 unshare_hek(gp->gp_file_hek);
1713 SvREFCNT_dec(gp->gp_sv);
1714 SvREFCNT_dec(gp->gp_av);
1715 /* FIXME - another reference loop GV -> symtab -> GV ?
1716 Somehow gp->gp_hv can end up pointing at freed garbage. */
1717 if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
1718 const char *hvname = HvNAME_get(gp->gp_hv);
1719 if (PL_stashcache && hvname)
1720 (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
1722 SvREFCNT_dec(gp->gp_hv);
1724 SvREFCNT_dec(gp->gp_io);
1725 SvREFCNT_dec(gp->gp_cv);
1726 SvREFCNT_dec(gp->gp_form);
1733 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1735 AMT * const amtp = (AMT*)mg->mg_ptr;
1736 PERL_UNUSED_ARG(sv);
1738 PERL_ARGS_ASSERT_MAGIC_FREEOVRLD;
1740 if (amtp && AMT_AMAGIC(amtp)) {
1742 for (i = 1; i < NofAMmeth; i++) {
1743 CV * const cv = amtp->table[i];
1745 SvREFCNT_dec(MUTABLE_SV(cv));
1746 amtp->table[i] = NULL;
1753 /* Updates and caches the CV's */
1755 * 1 on success and there is some overload
1756 * 0 if there is no overload
1757 * -1 if some error occurred and it couldn't croak
1761 Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing)
1764 MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1766 const struct mro_meta* stash_meta = HvMROMETA(stash);
1769 PERL_ARGS_ASSERT_GV_AMUPDATE;
1771 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1773 const AMT * const amtp = (AMT*)mg->mg_ptr;
1774 if (amtp->was_ok_am == PL_amagic_generation
1775 && amtp->was_ok_sub == newgen) {
1776 return AMT_OVERLOADED(amtp) ? 1 : 0;
1778 sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table);
1781 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
1784 amt.was_ok_am = PL_amagic_generation;
1785 amt.was_ok_sub = newgen;
1786 amt.fallback = AMGfallNO;
1790 int filled = 0, have_ovl = 0;
1793 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1795 /* Try to find via inheritance. */
1796 GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1797 SV * const sv = gv ? GvSV(gv) : NULL;
1801 lim = DESTROY_amg; /* Skip overloading entries. */
1802 #ifdef PERL_DONT_CREATE_GVSV
1804 NOOP; /* Equivalent to !SvTRUE and !SvOK */
1807 else if (SvTRUE(sv))
1808 amt.fallback=AMGfallYES;
1810 amt.fallback=AMGfallNEVER;
1812 for (i = 1; i < lim; i++)
1813 amt.table[i] = NULL;
1814 for (; i < NofAMmeth; i++) {
1815 const char * const cooky = PL_AMG_names[i];
1816 /* Human-readable form, for debugging: */
1817 const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1818 const STRLEN l = PL_AMG_namelens[i];
1820 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
1821 cp, HvNAME_get(stash)) );
1822 /* don't fill the cache while looking up!
1823 Creation of inheritance stubs in intermediate packages may
1824 conflict with the logic of runtime method substitution.
1825 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1826 then we could have created stubs for "(+0" in A and C too.
1827 But if B overloads "bool", we may want to use it for
1828 numifying instead of C's "+0". */
1829 if (i >= DESTROY_amg)
1830 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1831 else /* Autoload taken care of below */
1832 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1834 if (gv && (cv = GvCV(gv))) {
1836 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1837 && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
1838 /* This is a hack to support autoloading..., while
1839 knowing *which* methods were declared as overloaded. */
1840 /* GvSV contains the name of the method. */
1842 SV *gvsv = GvSV(gv);
1844 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
1845 "\" for overloaded \"%s\" in package \"%.256s\"\n",
1846 (void*)GvSV(gv), cp, hvname) );
1847 if (!gvsv || !SvPOK(gvsv)
1848 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
1851 /* Can be an import stub (created by "can"). */
1856 const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
1857 Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
1858 "in package \"%.256s\"",
1859 (GvCVGEN(gv) ? "Stub found while resolving"
1864 cv = GvCV(gv = ngv);
1866 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
1867 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
1868 GvNAME(CvGV(cv))) );
1870 if (i < DESTROY_amg)
1872 } else if (gv) { /* Autoloaded... */
1873 cv = MUTABLE_CV(gv);
1876 amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv));
1879 AMT_AMAGIC_on(&amt);
1881 AMT_OVERLOADED_on(&amt);
1882 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1883 (char*)&amt, sizeof(AMT));
1887 /* Here we have no table: */
1889 AMT_AMAGIC_off(&amt);
1890 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1891 (char*)&amt, sizeof(AMTS));
1897 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1903 struct mro_meta* stash_meta;
1905 if (!stash || !HvNAME_get(stash))
1908 stash_meta = HvMROMETA(stash);
1909 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1911 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1914 /* If we're looking up a destructor to invoke, we must avoid
1915 * that Gv_AMupdate croaks, because we might be dying already */
1916 if (Gv_AMupdate(stash, id == DESTROY_amg) == -1) {
1917 /* and if it didn't found a destructor, we fall back
1918 * to a simpler method that will only look for the
1919 * destructor instead of the whole magic */
1920 if (id == DESTROY_amg) {
1921 GV * const gv = gv_fetchmethod(stash, "DESTROY");
1927 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1930 amtp = (AMT*)mg->mg_ptr;
1931 if ( amtp->was_ok_am != PL_amagic_generation
1932 || amtp->was_ok_sub != newgen )
1934 if (AMT_AMAGIC(amtp)) {
1935 CV * const ret = amtp->table[id];
1936 if (ret && isGV(ret)) { /* Autoloading stab */
1937 /* Passing it through may have resulted in a warning
1938 "Inherited AUTOLOAD for a non-method deprecated", since
1939 our caller is going through a function call, not a method call.
1940 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1941 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
1953 /* Implement tryAMAGICun_MG macro.
1954 Do get magic, then see if the stack arg is overloaded and if so call it.
1956 AMGf_set return the arg using SETs rather than assigning to
1958 AMGf_numeric apply sv_2num to the stack arg.
1962 Perl_try_amagic_un(pTHX_ int method, int flags) {
1966 SV* const arg = TOPs;
1970 if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method,
1971 AMGf_noright | AMGf_unary))) {
1972 if (flags & AMGf_set) {
1977 if (SvPADMY(TARG)) {
1978 sv_setsv(TARG, tmpsv);
1988 if ((flags & AMGf_numeric) && SvROK(arg))
1994 /* Implement tryAMAGICbin_MG macro.
1995 Do get magic, then see if the two stack args are overloaded and if so
1998 AMGf_set return the arg using SETs rather than assigning to
2000 AMGf_assign op may be called as mutator (eg +=)
2001 AMGf_numeric apply sv_2num to the stack arg.
2005 Perl_try_amagic_bin(pTHX_ int method, int flags) {
2008 SV* const left = TOPm1s;
2009 SV* const right = TOPs;
2015 if (SvAMAGIC(left) || SvAMAGIC(right)) {
2016 SV * const tmpsv = amagic_call(left, right, method,
2017 ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0));
2019 if (flags & AMGf_set) {
2026 if (opASSIGN || SvPADMY(TARG)) {
2027 sv_setsv(TARG, tmpsv);
2037 if (flags & AMGf_numeric) {
2039 *(sp-1) = sv_2num(left);
2041 *sp = sv_2num(right);
2047 Perl_amagic_deref_call(pTHX_ SV *ref, int method) {
2050 PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL;
2052 while (SvAMAGIC(ref) &&
2053 (tmpsv = amagic_call(ref, &PL_sv_undef, method,
2054 AMGf_noright | AMGf_unary))) {
2056 Perl_croak(aTHX_ "Overloaded dereference did not return a reference");
2057 if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) {
2058 /* Bail out if it returns us the same reference. */
2063 return tmpsv ? tmpsv : ref;
2067 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
2072 CV **cvp=NULL, **ocvp=NULL;
2073 AMT *amtp=NULL, *oamtp=NULL;
2074 int off = 0, off1, lr = 0, notfound = 0;
2075 int postpr = 0, force_cpy = 0;
2076 int assign = AMGf_assign & flags;
2077 const int assignshift = assign ? 1 : 0;
2083 PERL_ARGS_ASSERT_AMAGIC_CALL;
2085 if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) {
2086 SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0);
2088 if ( !lex_mask || !SvOK(lex_mask) )
2089 /* overloading lexically disabled */
2091 else if ( lex_mask && SvPOK(lex_mask) ) {
2092 /* we have an entry in the hints hash, check if method has been
2093 * masked by overloading.pm */
2095 const int offset = method / 8;
2096 const int bit = method % 8;
2097 char *pv = SvPV(lex_mask, len);
2099 /* Bit set, so this overloading operator is disabled */
2100 if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) )
2105 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
2106 && (stash = SvSTASH(SvRV(left)))
2107 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2108 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2109 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
2111 && ((cv = cvp[off=method+assignshift])
2112 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
2118 cv = cvp[off=method])))) {
2119 lr = -1; /* Call method for left argument */
2121 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
2124 /* look for substituted methods */
2125 /* In all the covered cases we should be called with assign==0. */
2129 if ((cv = cvp[off=add_ass_amg])
2130 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
2131 right = &PL_sv_yes; lr = -1; assign = 1;
2136 if ((cv = cvp[off = subtr_ass_amg])
2137 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
2138 right = &PL_sv_yes; lr = -1; assign = 1;
2142 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
2145 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
2148 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
2151 (void)((cv = cvp[off=bool__amg])
2152 || (cv = cvp[off=numer_amg])
2153 || (cv = cvp[off=string_amg]));
2160 * SV* ref causes confusion with the interpreter variable of
2163 SV* const tmpRef=SvRV(left);
2164 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
2166 * Just to be extra cautious. Maybe in some
2167 * additional cases sv_setsv is safe, too.
2169 SV* const newref = newSVsv(tmpRef);
2170 SvOBJECT_on(newref);
2171 /* As a bit of a source compatibility hack, SvAMAGIC() and
2172 friends dereference an RV, to behave the same was as when
2173 overloading was stored on the reference, not the referant.
2174 Hence we can't use SvAMAGIC_on()
2176 SvFLAGS(newref) |= SVf_AMAGIC;
2177 SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef))));
2183 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
2184 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
2185 SV* const nullsv=sv_2mortal(newSViv(0));
2187 SV* const lessp = amagic_call(left,nullsv,
2188 lt_amg,AMGf_noright);
2189 logic = SvTRUE(lessp);
2191 SV* const lessp = amagic_call(left,nullsv,
2192 ncmp_amg,AMGf_noright);
2193 logic = (SvNV(lessp) < 0);
2196 if (off==subtr_amg) {
2207 if ((cv = cvp[off=subtr_amg])) {
2209 left = sv_2mortal(newSViv(0));
2214 case iter_amg: /* XXXX Eventually should do to_gv. */
2215 case ftest_amg: /* XXXX Eventually should do to_gv. */
2218 return NULL; /* Delegate operation to standard mechanisms. */
2226 return left; /* Delegate operation to standard mechanisms. */
2231 if (!cv) goto not_found;
2232 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
2233 && (stash = SvSTASH(SvRV(right)))
2234 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2235 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2236 ? (amtp = (AMT*)mg->mg_ptr)->table
2238 && (cv = cvp[off=method])) { /* Method for right
2241 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
2242 && (cvp=ocvp) && (lr = -1))
2243 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
2244 && !(flags & AMGf_unary)) {
2245 /* We look for substitution for
2246 * comparison operations and
2248 if (method==concat_amg || method==concat_ass_amg
2249 || method==repeat_amg || method==repeat_ass_amg) {
2250 return NULL; /* Delegate operation to string conversion */
2271 if ((off != -1) && (cv = cvp[off]))
2276 not_found: /* No method found, either report or croak */
2284 return left; /* Delegate operation to standard mechanisms. */
2287 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
2288 notfound = 1; lr = -1;
2289 } else if (cvp && (cv=cvp[nomethod_amg])) {
2290 notfound = 1; lr = 1;
2291 } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) {
2292 /* Skip generating the "no method found" message. */
2296 if (off==-1) off=method;
2297 msg = sv_2mortal(Perl_newSVpvf(aTHX_
2298 "Operation \"%s\": no method found,%sargument %s%s%s%s",
2299 AMG_id2name(method + assignshift),
2300 (flags & AMGf_unary ? " " : "\n\tleft "),
2302 "in overloaded package ":
2303 "has no overloaded magic",
2305 HvNAME_get(SvSTASH(SvRV(left))):
2308 ",\n\tright argument in overloaded package ":
2311 : ",\n\tright argument has no overloaded magic"),
2313 HvNAME_get(SvSTASH(SvRV(right))):
2315 if (amtp && amtp->fallback >= AMGfallYES) {
2316 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
2318 Perl_croak(aTHX_ "%"SVf, SVfARG(msg));
2322 force_cpy = force_cpy || assign;
2327 DEBUG_o(Perl_deb(aTHX_
2328 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n",
2330 method+assignshift==off? "" :
2332 method+assignshift==off? "" :
2333 AMG_id2name(method+assignshift),
2334 method+assignshift==off? "" : "\")",
2335 flags & AMGf_unary? "" :
2336 lr==1 ? " for right argument": " for left argument",
2337 flags & AMGf_unary? " for argument" : "",
2338 stash ? HvNAME_get(stash) : "null",
2339 fl? ",\n\tassignment variant used": "") );
2342 /* Since we use shallow copy during assignment, we need
2343 * to dublicate the contents, probably calling user-supplied
2344 * version of copy operator
2346 /* We need to copy in following cases:
2347 * a) Assignment form was called.
2348 * assignshift==1, assign==T, method + 1 == off
2349 * b) Increment or decrement, called directly.
2350 * assignshift==0, assign==0, method + 0 == off
2351 * c) Increment or decrement, translated to assignment add/subtr.
2352 * assignshift==0, assign==T,
2354 * d) Increment or decrement, translated to nomethod.
2355 * assignshift==0, assign==0,
2357 * e) Assignment form translated to nomethod.
2358 * assignshift==1, assign==T, method + 1 != off
2361 /* off is method, method+assignshift, or a result of opcode substitution.
2362 * In the latter case assignshift==0, so only notfound case is important.
2364 if (( (method + assignshift == off)
2365 && (assign || (method == inc_amg) || (method == dec_amg)))
2368 /* newSVsv does not behave as advertised, so we copy missing
2369 * information by hand */
2370 SV *tmpRef = SvRV(left);
2372 if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLun(left,copy))) {
2373 SvRV_set(left, rv_copy);
2375 SvREFCNT_dec(tmpRef);
2383 const bool oldcatch = CATCH_GET;
2386 Zero(&myop, 1, BINOP);
2387 myop.op_last = (OP *) &myop;
2388 myop.op_next = NULL;
2389 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
2391 PUSHSTACKi(PERLSI_OVERLOAD);
2394 PL_op = (OP *) &myop;
2395 if (PERLDB_SUB && PL_curstash != PL_debstash)
2396 PL_op->op_private |= OPpENTERSUB_DB;
2400 EXTEND(SP, notfound + 5);
2401 PUSHs(lr>0? right: left);
2402 PUSHs(lr>0? left: right);
2403 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
2405 PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift),
2406 AMG_id2namelen(method + assignshift), SVs_TEMP));
2408 PUSHs(MUTABLE_SV(cv));
2411 if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX)))
2419 CATCH_SET(oldcatch);
2426 ans=SvIV(res)<=0; break;
2429 ans=SvIV(res)<0; break;
2432 ans=SvIV(res)>=0; break;
2435 ans=SvIV(res)>0; break;
2438 ans=SvIV(res)==0; break;
2441 ans=SvIV(res)!=0; break;
2444 SvSetSV(left,res); return left;
2446 ans=!SvTRUE(res); break;
2451 } else if (method==copy_amg) {
2453 Perl_croak(aTHX_ "Copy method did not return a reference");
2455 return SvREFCNT_inc(SvRV(res));
2463 =for apidoc is_gv_magical_sv
2465 Returns C<TRUE> if given the name of a magical GV.
2467 Currently only useful internally when determining if a GV should be
2468 created even in rvalue contexts.
2470 C<flags> is not used at present but available for future extension to
2471 allow selecting particular classes of magical variable.
2473 Currently assumes that C<name> is NUL terminated (as well as len being valid).
2474 This assumption is met by all callers within the perl core, which all pass
2475 pointers returned by SvPV.
2481 Perl_is_gv_magical_sv(pTHX_ SV *const name_sv, U32 flags)
2484 const char *const name = SvPV_const(name_sv, len);
2486 PERL_UNUSED_ARG(flags);
2487 PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV;
2490 const char * const name1 = name + 1;
2493 if (len == 3 && name[1] == 'S' && name[2] == 'A')
2497 if (len == 8 && strEQ(name1, "VERLOAD"))
2501 if (len == 3 && name[1] == 'I' && name[2] == 'G')
2504 /* Using ${^...} variables is likely to be sufficiently rare that
2505 it seems sensible to avoid the space hit of also checking the
2507 case '\017': /* ${^OPEN} */
2508 if (strEQ(name1, "PEN"))
2511 case '\024': /* ${^TAINT} */
2512 if (strEQ(name1, "AINT"))
2515 case '\025': /* ${^UNICODE} */
2516 if (strEQ(name1, "NICODE"))
2518 if (strEQ(name1, "TF8LOCALE"))
2521 case '\027': /* ${^WARNING_BITS} */
2522 if (strEQ(name1, "ARNING_BITS"))
2535 const char *end = name + len;
2536 while (--end > name) {
2544 /* Because we're already assuming that name is NUL terminated
2545 below, we can treat an empty name as "\0" */
2571 case '\001': /* $^A */
2572 case '\003': /* $^C */
2573 case '\004': /* $^D */
2574 case '\005': /* $^E */
2575 case '\006': /* $^F */
2576 case '\010': /* $^H */
2577 case '\011': /* $^I, NOT \t in EBCDIC */
2578 case '\014': /* $^L */
2579 case '\016': /* $^N */
2580 case '\017': /* $^O */
2581 case '\020': /* $^P */
2582 case '\023': /* $^S */
2583 case '\024': /* $^T */
2584 case '\026': /* $^V */
2585 case '\027': /* $^W */
2605 Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
2610 PERL_ARGS_ASSERT_GV_NAME_SET;
2611 PERL_UNUSED_ARG(flags);
2614 Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
2616 if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
2617 unshare_hek(GvNAME_HEK(gv));
2620 PERL_HASH(hash, name, len);
2621 GvNAME_HEK(gv) = share_hek(name, len, hash);
2625 =for apidoc gv_try_downgrade
2627 If the typeglob C<gv> can be expressed more succinctly, by having
2628 something other than a real GV in its place in the stash, replace it
2629 with the optimised form. Basic requirements for this are that C<gv>
2630 is a real typeglob, is sufficiently ordinary, and is only referenced
2631 from its package. This function is meant to be used when a GV has been
2632 looked up in part to see what was there, causing upgrading, but based
2633 on what was found it turns out that the real GV isn't required after all.
2635 If C<gv> is a completely empty typeglob, it is deleted from the stash.
2637 If C<gv> is a typeglob containing only a sufficiently-ordinary constant
2638 sub, the typeglob is replaced with a scalar-reference placeholder that
2639 more compactly represents the same thing.
2645 Perl_gv_try_downgrade(pTHX_ GV *gv)
2651 PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
2653 /* XXX Why and where does this leave dangling pointers during global
2655 if (PL_phase == PERL_PHASE_DESTRUCT) return;
2657 if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
2658 !SvOBJECT(gv) && !SvREADONLY(gv) &&
2659 isGV_with_GP(gv) && GvGP(gv) &&
2660 !GvINTRO(gv) && GvREFCNT(gv) == 1 &&
2661 !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
2662 GvEGVx(gv) == gv && (stash = GvSTASH(gv))))
2664 if (SvMAGICAL(gv)) {
2666 /* only backref magic is allowed */
2667 if (SvGMAGICAL(gv) || SvSMAGICAL(gv))
2669 for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) {
2670 if (mg->mg_type != PERL_MAGIC_backref)
2676 HEK *gvnhek = GvNAME_HEK(gv);
2677 (void)hv_delete(stash, HEK_KEY(gvnhek),
2678 HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD);
2679 } else if (GvMULTI(gv) && cv &&
2680 !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) &&
2681 CvSTASH(cv) == stash && CvGV(cv) == gv &&
2682 CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) &&
2683 !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) &&
2684 (namehek = GvNAME_HEK(gv)) &&
2685 (gvp = hv_fetch(stash, HEK_KEY(namehek),
2686 HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) &&
2688 SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr);
2692 SvFLAGS(gv) = SVt_IV|SVf_ROK;
2693 SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) -
2694 STRUCT_OFFSET(XPVIV, xiv_iv));
2695 SvRV_set(gv, value);
2701 * c-indentation-style: bsd
2703 * indent-tabs-mode: t
2706 * ex: set ts=8 sts=4 sw=4 noet: