if (!*where)
*where = newSV_type(type);
+ if (type == SVt_PVAV && GvNAMELEN(gv) == 3
+ && strnEQ(GvNAME(gv), "ISA", 3))
+ sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0);
return gv;
}
Perl_cvgv_set(pTHX_ CV* cv, GV* gv)
{
GV * const oldgv = CvGV(cv);
+ HEK *hek;
PERL_ARGS_ASSERT_CVGV_SET;
if (oldgv == gv)
sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv));
}
}
+ else if ((hek = CvNAME_HEK(cv))) unshare_hek(hek);
- SvANY(cv)->xcv_gv = gv;
+ SvANY(cv)->xcv_gv_u.xcv_gv = gv;
assert(!CvCVGV_RC(cv));
if (!gv)
gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 ));
if (flags & GV_ADDMULTI || doproto) /* doproto means it */
GvMULTI_on(gv); /* _was_ mentioned */
- if (doproto) { /* Replicate part of newSUB here. */
+ if (doproto) {
CV *cv;
- ENTER;
if (has_constant) {
/* newCONSTSUB takes ownership of the reference from us. */
cv = newCONSTSUB_flags(stash, name, len, flags, has_constant);
from a reference to CV. */
if (exported_constant)
GvIMPORTED_CV_on(gv);
+ CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */
} else {
- (void) start_subparse(0,0); /* Create empty CV in compcv. */
- cv = PL_compcv;
- GvCV_set(gv,cv);
+ cv = newSTUB(gv,1);
}
- LEAVE;
-
- mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */
- CvGV_set(cv, gv);
- CvFILE_set_from_cop(cv, PL_curcop);
- CvSTASH_set(cv, PL_curstash);
if (proto) {
sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen,
SV_HAS_TRAILING_NUL);
which in the case of success contains an alias for the subroutine, and sets
up caching info for this glob.
-Currently, the only significant value for C<flags> is SVf_UTF8.
+The only significant values for C<flags> are GV_SUPER and SVf_UTF8.
+
+GV_SUPER indicates that we want to look up the method in the superclasses
+of the C<stash>.
-This function grants C<"SUPER"> token as a postfix of the stash name. The
+The
GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
visible to Perl code. So when calling C<call_sv>, you should not use
the GV directly; instead, you should use the method's CV, which can be
AV* linear_av;
SV** linear_svp;
SV* linear_sv;
- HV* cstash;
+ HV* cstash, *cachestash;
GV* candidate = NULL;
CV* cand_cv = NULL;
GV* topgv = NULL;
const char *hvname;
I32 create = (level >= 0) ? 1 : 0;
I32 items;
- STRLEN packlen;
U32 topgen_cmp;
U32 is_utf8 = flags & SVf_UTF8;
assert(hvname);
assert(name);
- DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
+ DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n",
+ flags & GV_SUPER ? "SUPER " : "",name,hvname) );
topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation;
+ if (flags & GV_SUPER) {
+ if (!HvAUX(stash)->xhv_super) HvAUX(stash)->xhv_super = newHV();
+ cachestash = HvAUX(stash)->xhv_super;
+ }
+ else cachestash = stash;
+
/* check locally for a real method or a cache entry */
- gvp = (GV**)hv_fetch(stash, name, is_utf8 ? -(I32)len : (I32)len, create);
+ gvp = (GV**)hv_fetch(cachestash, name, is_utf8 ? -(I32)len : (I32)len,
+ create);
if(gvp) {
topgv = *gvp;
have_gv:
/* cache indicates no such method definitively */
return 0;
}
- else if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4
+ else if (stash == cachestash
+ && len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4
&& strnEQ(hvname, "CORE", 4)
&& S_maybe_add_coresub(aTHX_ NULL,topgv,name,len))
goto have_gv;
}
- packlen = HvNAMELEN_get(stash);
- if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
- HV* basestash;
- packlen -= 7;
- basestash = gv_stashpvn(hvname, packlen,
- GV_ADD | (HvNAMEUTF8(stash) ? SVf_UTF8 : 0));
- linear_av = mro_get_linear_isa(basestash);
- }
- else {
- linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
- }
-
+ linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
linear_svp = AvARRAY(linear_av) + 1; /* skip over self */
items = AvFILLp(linear_av); /* no +1, to skip over self */
while (items--) {
/* Check UNIVERSAL without caching */
if(level == 0 || level == -1) {
- candidate = gv_fetchmeth_pvn(NULL, name, len, 1, flags);
+ candidate = gv_fetchmeth_pvn(NULL, name, len, 1, flags &~GV_SUPER);
if(candidate) {
cand_cv = GvCV(candidate);
if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
=cut
*/
-STATIC HV*
-S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen, U32 flags)
-{
- AV* superisa;
- GV** gvp;
- GV* gv;
- HV* stash;
-
- PERL_ARGS_ASSERT_GV_GET_SUPER_PKG;
-
- stash = gv_stashpvn(name, namelen, flags);
- if(stash) return stash;
-
- /* If we must create it, give it an @ISA array containing
- the real package this SUPER is for, so that it's tied
- into the cache invalidation code correctly */
- stash = gv_stashpvn(name, namelen, GV_ADD | flags);
- gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
- gv = *gvp;
- gv_init(gv, stash, "ISA", 3, TRUE);
- superisa = GvAVn(gv);
- GvMULTI_on(gv);
- sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0);
- av_push(superisa, newSVhek(CopSTASH(PL_curcop)
- ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL));
-
- return stash;
-}
-
GV *
Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
{
Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags)
{
dVAR;
- register const char *nend;
+ const char *nend;
const char *nsplit = NULL;
GV* gv;
HV* ostash = stash;
if (nsplit) {
if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
/* ->SUPER::method should really be looked up in original stash */
- SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_
- "%"HEKf"::SUPER",
- HEKfARG(HvNAME_HEK((HV*)CopSTASH(PL_curcop)))
- ));
- /* __PACKAGE__::SUPER stash should be autovivified */
- stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr), SvUTF8(tmpstr));
+ stash = CopSTASH(PL_curcop);
+ flags |= GV_SUPER;
DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
- origname, HvNAME_get(stash), name) );
+ origname, HvENAME_get(stash), name) );
+ }
+ else if ((nsplit - origname) >= 7 &&
+ strnEQ(nsplit - 7, "::SUPER", 7)) {
+ /* don't autovifify if ->NoSuchStash::SUPER::method */
+ stash = gv_stashpvn(origname, nsplit - origname - 7, is_utf8);
+ if (stash) flags |= GV_SUPER;
}
else {
/* don't autovifify if ->NoSuchStash::method */
stash = gv_stashpvn(origname, nsplit - origname, is_utf8);
-
- /* however, explicit calls to Pkg::SUPER::method may
- happen, and may require autovivification to work */
- if (!stash && (nsplit - origname) >= 7 &&
- strnEQ(nsplit - 7, "::SUPER", 7) &&
- gv_stashpvn(origname, nsplit - origname - 7, is_utf8))
- stash = gv_get_super_pkg(origname, nsplit - origname, flags);
}
ostash = stash;
}
}
else
packname = sv_2mortal(newSVhek(HvNAME_HEK(stash)));
+ if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER");
}
if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, is_utf8)))
return NULL;
}
LEAVE;
varsv = GvSVn(vargv);
+ SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */
+ /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */
sv_setsv(varsv, packname);
sv_catpvs(varsv, "::");
/* Ensure SvSETMAGIC() is called if necessary. In particular, to clear
C<flags> is 0 (or any other setting that does not create packages) then NULL
is returned.
+Flags may be one of:
+
+ GV_ADD
+ SVf_UTF8
+ GV_NOADD_NOINIT
+ GV_NOINIT
+ GV_NOEXPAND
+ GV_ADDMG
+
+The most important of which are probably GV_ADD and SVf_UTF8.
=cut
*/
const svtype sv_type)
{
dVAR;
- register const char *name = nambeg;
- register GV *gv = NULL;
+ const char *name = nambeg;
+ GV *gv = NULL;
GV**gvp;
I32 len;
- register const char *name_cursor;
+ const char *name_cursor;
HV *stash = NULL;
const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
const I32 no_expand = flags & GV_NOEXPAND;
require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
}
if (sv_type==SVt_PV || sv_type==SVt_PVGV) {
- if (*name == '[')
- require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
- else if (*name == '&' || *name == '`' || *name == '\'') {
- PL_sawampersand = TRUE;
- (void)GvSVn(gv);
- }
+ switch (*name) {
+ case '[':
+ require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
+ break;
+ case '`':
+ PL_sawampersand |= SAWAMPERSAND_LEFT;
+ (void)GvSVn(gv);
+ break;
+ case '&':
+ PL_sawampersand |= SAWAMPERSAND_MIDDLE;
+ (void)GvSVn(gv);
+ break;
+ case '\'':
+ PL_sawampersand |= SAWAMPERSAND_RIGHT;
+ (void)GvSVn(gv);
+ break;
+ }
}
}
else if (len == 3 && sv_type == SVt_PVAV
if (strEQ(name2, "LOBAL_PHASE"))
goto ro_magicalize;
break;
+ case '\014': /* $^LAST_FH */
+ if (strEQ(name2, "AST_FH"))
+ goto ro_magicalize;
+ break;
case '\015': /* $^MATCH */
if (strEQ(name2, "ATCH"))
goto magicalize;
sv_type == SVt_PVCV ||
sv_type == SVt_PVFM ||
sv_type == SVt_PVIO
- )) { PL_sawampersand = TRUE; }
+ )) { PL_sawampersand |=
+ (*name == '`')
+ ? SAWAMPERSAND_LEFT
+ : (*name == '&')
+ ? SAWAMPERSAND_MIDDLE
+ : SAWAMPERSAND_RIGHT;
+ }
goto magicalize;
case ':': /* $: */
case '\014': /* $^L */
sv_setpvs(GvSVn(gv),"\f");
- PL_formfeed = GvSVn(gv);
break;
case ';': /* $; */
sv_setpvs(GvSVn(gv),"\034");
Perl_gv_check(pTHX_ const HV *stash)
{
dVAR;
- register I32 i;
+ I32 i;
PERL_ARGS_ASSERT_GV_CHECK;
for (i = 0; i <= (I32) HvMAX(stash); i++) {
const HE *entry;
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
- register GV *gv;
+ GV *gv;
HV *hv;
if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
(gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
Somehow gp->gp_hv can end up pointing at freed garbage. */
if (hv && SvTYPE(hv) == SVt_PVHV) {
const HEK *hvname_hek = HvNAME_HEK(hv);
+ DEBUG_o(Perl_deb(aTHX_ "gp_free clearing PL_stashcache for '%"HEKf"'\n", hvname_hek));
if (PL_stashcache && hvname_hek)
(void)hv_delete(PL_stashcache, HEK_KEY(hvname_hek),
(HEK_UTF8(hvname_hek) ? -HEK_LEN(hvname_hek) : HEK_LEN(hvname_hek)),
}
#endif
else if (SvTRUE(sv))
+ /* don't need to set overloading here because fallback => 1
+ * is the default setting for classes without overloading */
amt.fallback=AMGfallYES;
- else if (SvOK(sv))
+ else if (SvOK(sv)) {
amt.fallback=AMGfallNEVER;
+ filled = 1;
+ have_ovl = 1;
+ }
+ else {
+ filled = 1;
+ have_ovl = 1;
+ }
for (i = 1; i < lim; i++)
amt.table[i] = NULL;
int assign = AMGf_assign & flags;
const int assignshift = assign ? 1 : 0;
int use_default_op = 0;
+ int force_scalar = 0;
#ifdef DEBUGGING
int fl=0;
#endif
force_cpy = force_cpy || assign;
}
}
+
+ switch (method) {
+ /* in these cases, we're calling '+' or '-' as a fallback for a ++ or --
+ * operation. we need this to return a value, so that it can be assigned
+ * later on, in the postpr block (case inc_amg/dec_amg), even if the
+ * increment or decrement was itself called in void context */
+ case inc_amg:
+ if (off == add_amg)
+ force_scalar = 1;
+ break;
+ case dec_amg:
+ if (off == subtr_amg)
+ force_scalar = 1;
+ break;
+ /* in these cases, we're calling an assignment variant of an operator
+ * (+= rather than +, for instance). regardless of whether it's a
+ * fallback or not, it always has to return a value, which will be
+ * assigned to the proper variable later */
+ case add_amg:
+ case subtr_amg:
+ case mult_amg:
+ case div_amg:
+ case modulo_amg:
+ case pow_amg:
+ case lshift_amg:
+ case rshift_amg:
+ case repeat_amg:
+ case concat_amg:
+ case band_amg:
+ case bor_amg:
+ case bxor_amg:
+ if (assign)
+ force_scalar = 1;
+ break;
+ /* the copy constructor always needs to return a value */
+ case copy_amg:
+ force_scalar = 1;
+ break;
+ /* because of the way these are implemented (they don't perform the
+ * dereferencing themselves, they return a reference that perl then
+ * dereferences later), they always have to be in scalar context */
+ case to_sv_amg:
+ case to_av_amg:
+ case to_hv_amg:
+ case to_gv_amg:
+ case to_cv_amg:
+ force_scalar = 1;
+ break;
+ /* these don't have an op of their own; they're triggered by their parent
+ * op, so the context there isn't meaningful ('$a and foo()' in void
+ * context still needs to pass scalar context on to $a's bool overload) */
+ case bool__amg:
+ case numer_amg:
+ case string_amg:
+ force_scalar = 1;
+ break;
+ }
+
#ifdef DEBUGGING
if (!notfound) {
DEBUG_o(Perl_deb(aTHX_
BINOP myop;
SV* res;
const bool oldcatch = CATCH_GET;
+ I32 oldmark, nret;
+ int gimme = force_scalar ? G_SCALAR : GIMME_V;
CATCH_SET(TRUE);
Zero(&myop, 1, BINOP);
myop.op_last = (OP *) &myop;
myop.op_next = NULL;
- myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
+ myop.op_flags = OPf_STACKED;
+
+ switch (gimme) {
+ case G_VOID:
+ myop.op_flags |= OPf_WANT_VOID;
+ break;
+ case G_ARRAY:
+ if (flags & AMGf_want_list) {
+ myop.op_flags |= OPf_WANT_LIST;
+ break;
+ }
+ /* FALLTHROUGH */
+ default:
+ myop.op_flags |= OPf_WANT_SCALAR;
+ break;
+ }
PUSHSTACKi(PERLSI_OVERLOAD);
ENTER;
}
PUSHs(MUTABLE_SV(cv));
PUTBACK;
+ oldmark = TOPMARK;
if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX)))
CALLRUNOPS(aTHX);
LEAVE;
SPAGAIN;
+ nret = SP - (PL_stack_base + oldmark);
+
+ switch (gimme) {
+ case G_VOID:
+ /* returning NULL has another meaning, and we check the context
+ * at the call site too, so this can be differentiated from the
+ * scalar case */
+ res = &PL_sv_undef;
+ SP = PL_stack_base + oldmark;
+ break;
+ case G_ARRAY: {
+ if (flags & AMGf_want_list) {
+ res = sv_2mortal((SV *)newAV());
+ av_extend((AV *)res, nret);
+ while (nret--)
+ av_store((AV *)res, nret, POPs);
+ break;
+ }
+ /* FALLTHROUGH */
+ }
+ default:
+ res = POPs;
+ break;
+ }
- res=POPs;
PUTBACK;
POPSTACK;
CATCH_SET(oldcatch);
https://perl5.git.perl.org / perl5.git / blobdiff