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25ab410896
A scoped-down version of #39307. Implement extension of bound generic types. The important bit here is in TypeCheckGeneric where we now use the underlying type of a typealias and its associated nominal type decl when we're generating substitutions for the extended type. Put this behind a new experimental flag -enable-experimental-bound-generic-extensions Resolves SR-4875 Resolves rdar://17434633
41 lines
1.5 KiB
Swift
41 lines
1.5 KiB
Swift
// RUN: %target-swift-frontend -module-name Test -typecheck -emit-module-interface-path - -enable-experimental-bound-generic-extensions %s | %FileCheck %s
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public struct Tree<T> {
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public struct Branch<B> {
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public struct Nest<N> {
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public struct Egg {}
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}
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}
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}
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// CHECK: extension Test.Tree.Branch.Nest.Egg {
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// CHECK: public static func tweet()
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// CHECK: }
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extension Tree.Branch.Nest.Egg { public static func tweet() {} }
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// CHECK: extension Test.Tree.Branch.Nest.Egg where T == Swift.Int {
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// CHECK: public static func twoot()
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// CHECK: }
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extension Tree<Int>.Branch.Nest.Egg { public static func twoot() {} }
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// CHECK: extension Test.Tree.Branch.Nest.Egg where T == Swift.Int, B == Swift.String {
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// CHECK: public static func twote()
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// CHECK: }
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extension Tree<Int>.Branch<String>.Nest.Egg { public static func twote() {} }
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// CHECK: extension Test.Tree.Branch.Nest.Egg where T == Swift.Int, B == Swift.String, N == Swift.Void {
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// CHECK: public static func twite()
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// CHECK: }
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extension Tree<Int>.Branch<String>.Nest<Void>.Egg { public static func twite() {} }
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// CHECK: extension Swift.Array where Element == Swift.String {
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// CHECK: public func rejoinder() -> Swift.String
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// CHECK: }
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extension [String] { public func rejoinder() -> String { return self.joined() } }
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// CHECK: public typealias StringDict<T> = [Swift.String : T]
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public typealias StringDict<T> = [String: T]
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// CHECK: extension Swift.Dictionary where Key == Swift.String, Value == Swift.Int
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extension StringDict<Int> { public static func mark() {} }
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