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Fix a metatype casting bug in the new casting runtime.

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Swift SVN r19078
This commit is contained in:
John McCall
2014-06-22 09:53:34 +00:00
parent e8428377de
commit d0dc196e8b
1 changed files with 7 additions and 3 deletions
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10
stdlib/runtime/Casting.cpp
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@@ -753,15 +753,19 @@ static bool _dynamicCastFromExistential(OpaqueValue *dest,
}
/// Perform a dynamic cast of a metatype to a metatype.
///
/// Note that the check is whether 'metatype' is an *instance of*
/// 'targetType', not a *subtype of it*.
static bool _dynamicCastMetatypeToMetatype(OpaqueValue *dest,
const Metadata *metatype,
const Metadata *targetType,
const MetatypeMetadata *targetType,
DynamicCastFlags flags) {
const Metadata *result;
if (flags & DynamicCastFlags::Unconditional) {
result = swift_dynamicCastMetatypeUnconditional(metatype, targetType);
result = swift_dynamicCastMetatypeUnconditional(metatype,
targetType->InstanceType);
} else {
result = swift_dynamicCastMetatype(metatype, targetType);
result = swift_dynamicCastMetatype(metatype, targetType->InstanceType);
if (!result) return false;
}