- gvp = (GV**)hv_fetchs(stash, "ISA", FALSE);
-
- if (gvp && (gv = *gvp) && isGV_with_GP(gv) && (av = GvAV(gv))) {
- if (!hv || !subgen) {
- gvp = (GV**)hv_fetchs(stash, "::ISA::CACHE::", TRUE);
-
- gv = *gvp;
-
- if (SvTYPE(gv) != SVt_PVGV)
- gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE);
-
- if (!hv)
- hv = GvHVn(gv);
- if (!subgen) {
- subgen = newSViv(PL_sub_generation);
- GvSV(gv) = subgen;
- }
- }
- if (hv) {
- SV** svp = AvARRAY(av);
- /* NOTE: No support for tied ISA */
- I32 items = AvFILLp(av) + 1;
- while (items--) {
- SV* const sv = *svp++;
- HV* const basestash = gv_stashsv(sv, 0);
- if (!basestash) {
- if (ckWARN(WARN_MISC))
- Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
- "Can't locate package %"SVf" for @%s::ISA",
- SVfARG(sv), hvname);
- continue;
- }
- if (isa_lookup(basestash, name, name_stash, len, level + 1)) {
- (void)hv_store(hv,name,len,&PL_sv_yes,0);
- return TRUE;
- }
- }
- (void)hv_store(hv,name,len,&PL_sv_no,0);
- }
- }