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Runtime: Recognize class and @objc existential metatypes as class instances in swift_isClassOrObjCExistential.

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Fixes rdar://problem/20131232.

Swift SVN r27534
This commit is contained in:
Joe Groff
2015-04-21 18:24:10 +00:00
parent 32211041d2
commit 79ee6f21c4
2 changed files with 39 additions and 5 deletions
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28
stdlib/public/runtime/Casting.cpp
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@@ -2490,13 +2490,31 @@ _TFSs26_injectNothingIntoOptionalU__FT_GSqQ__(const Metadata *T);
static inline bool swift_isClassOrObjCExistentialImpl(const Metadata *T) {
auto kind = T->getKind();
// Classes.
if (Metadata::isAnyKindOfClass(kind))
return true;
#if SWIFT_OBJC_INTEROP
return Metadata::isAnyKindOfClass(kind) ||
(kind == MetadataKind::Existential &&
static_cast<const ExistentialTypeMetadata *>(T)->isObjC());
#else
return Metadata::isAnyKindOfClass(kind);
// ObjC existentials.
if (kind == MetadataKind::Existential &&
static_cast<const ExistentialTypeMetadata *>(T)->isObjC())
return true;
// Class metadata records are also objects with ObjC interop.
if (kind == MetadataKind::Metatype) {
auto metaT = static_cast<const MetatypeMetadata *>(T);
return metaT->InstanceType->isAnyClass();
}
if (kind == MetadataKind::ExistentialMetatype) {
auto xmT = static_cast<const ExistentialMetatypeMetadata *>(T);
if (xmT->InstanceType->getKind() == MetadataKind::Existential)
return static_cast<const ExistentialTypeMetadata *>(xmT->InstanceType)
->isObjC();
return false;
}
#endif
return false;
}
#if SWIFT_OBJC_INTEROP