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// RUN: %target-typecheck-verify-swift
struct Foo<T> {
var maybeT: T? { return nil }
}
extension Foo {
struct Bar<U, V> {
var maybeT: T? { return nil }
var maybeU: U? { return nil }
var maybeV: V? { return nil }
struct Inner {
var maybeT: T? { return nil }
var maybeU: U? { return nil }
var maybeV: V? { return nil }
}
}
}
typealias FooInt = Foo<Int>
extension FooInt {
func goodT() -> Int {
return maybeT!
}
func badT() -> Float {
return maybeT! // expected-error{{cannot convert return expression of type 'Int' to return type 'Float'}}
}
}
typealias FooIntBarFloatDouble = Foo<Int>.Bar<Float, Double>
extension FooIntBarFloatDouble {
func goodT() -> Int {
return maybeT!
}
func goodU() -> Float {
return maybeU!
}
func goodV() -> Double {
return maybeV!
}
func badT() -> Float {
return maybeT! // expected-error{{cannot convert return expression of type 'Int' to return type 'Float'}}
}
func badU() -> Int {
return maybeU! // expected-error{{cannot convert return expression of type 'Float' to return type 'Int'}}
}
func badV() -> Int {
return maybeV! // expected-error{{cannot convert return expression of type 'Double' to return type 'Int'}}
}
}
typealias FooIntBarFloatDoubleInner = Foo<Int>.Bar<Float, Double>.Inner
extension FooIntBarFloatDoubleInner {
func goodT() -> Int {
return maybeT!
}
func goodU() -> Float {
return maybeU!
}
func goodV() -> Double {
return maybeV!
}
func badT() -> Float {
return maybeT! // expected-error{{cannot convert return expression of type 'Int' to return type 'Float'}}
}
func badU() -> Int {
return maybeU! // expected-error{{cannot convert return expression of type 'Float' to return type 'Int'}}
}
func badV() -> Int {
return maybeV! // expected-error{{cannot convert return expression of type 'Double' to return type 'Int'}}
}
}
struct Foo2<T1, T2, T3,> {}
typealias Bar2<
T1,
T2,
> = Foo2<
T1,
T2,
Bool,
>
let _ = Foo2<Int, Bool, String,>.self
let _ = Bar2<Int, Bool,>()
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