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9302cbe568
Since this is a source breaking change, downgrade the diagnostic to a warning until the next language version unless library evolution is enabled, in which case this would have resulted in a broken `.swiftinterface` and it therefore makes sense to diagnose eagerly. Resolves rdar://156919010.
55 lines
1.3 KiB
Swift
55 lines
1.3 KiB
Swift
// RUN: %target-swift-emit-ir %s -module-name=main -enable-experimental-feature Embedded | %FileCheck %s
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// REQUIRES: swift_in_compiler
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// REQUIRES: swift_feature_Embedded
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@propertyWrapper
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@dynamicMemberLookup
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public struct Binding<Value> {
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public var wrappedValue: Value
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init(get: @escaping () -> Value, set: @escaping (Value) -> Void) {
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self.wrappedValue = get()
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}
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public subscript<Subject>(dynamicMember keyPath: WritableKeyPath<Value, Subject>) -> Binding<Subject> {
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get { fatalError() }
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}
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}
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public struct State<Wrapped> {
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public var wrappedValue: Wrapped
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public init(wrappedValue: Wrapped) {
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self.wrappedValue = wrappedValue
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}
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public var projectedValue: Projection {
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Projection(wrappedValue: wrappedValue)
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}
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@dynamicMemberLookup
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public struct Projection {
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var wrappedValue: Wrapped
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public subscript<Member>(dynamicMember keyPath: ReferenceWritableKeyPath<Wrapped, Member>) -> Binding<Member> where Wrapped: AnyObject {
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Binding(get: {
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wrappedValue[keyPath: keyPath]
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}, set: { newValue in
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wrappedValue[keyPath: keyPath] = newValue
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})
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}
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}
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}
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public struct S<T> {
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public private(set) subscript(x: Int) -> Int {
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get {
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return 27
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}
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mutating set {
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}
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}
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}
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// CHECK: define {{.*}}@{{_*}}main{{.*}}(
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