[4.2] Swift 4 compatibility hack for redeclaration of properties in generic type and extension #17414
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"illegal" is an overloaded word and can distress people who aren't familiar with the usage as being illegal with respect to the language definition, not the actual law.
…tensions of generic types.
The patch that nailed down our semantics here missed an additional case that
required a compatibility hack: a property on a generic type and a same-named one
in an (unconstrained) extension:
struct Foo<T> {
var x: Int { return 0 }
}
extension Foo {
var x: Bool { return false }
}
Fixes rdar://problem/40685642.
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@swift-ci please test |
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The patch that nailed down our semantics here missed an additional case that
required a compatibility hack: a property on a generic type and a same-named one
in an (unconstrained) extension:
Fixes rdar://problem/40685642.
4.2 merge of #17392