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// RUN: %target-swift-emit-ir %s -module-name=main -enable-experimental-feature Embedded | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: OS=macosx || OS=linux-gnu
@propertyWrapper
@dynamicMemberLookup
public struct Binding<Value> {
public var wrappedValue: Value
init(get: @escaping () -> Value, set: @escaping (Value) -> Void) {
self.wrappedValue = get()
}
subscript<Subject>(dynamicMember keyPath: WritableKeyPath<Value, Subject>) -> Binding<Subject> {
get { fatalError() }
}
}
public struct State<Wrapped> {
public var wrappedValue: Wrapped
public init(wrappedValue: Wrapped) {
self.wrappedValue = wrappedValue
}
public var projectedValue: Projection {
Projection(wrappedValue: wrappedValue)
}
@dynamicMemberLookup
public struct Projection {
var wrappedValue: Wrapped
public subscript<Member>(dynamicMember keyPath: ReferenceWritableKeyPath<Wrapped, Member>) -> Binding<Member> where Wrapped: AnyObject {
Binding(get: {
wrappedValue[keyPath: keyPath]
}, set: { newValue in
wrappedValue[keyPath: keyPath] = newValue
})
}
}
}
// CHECK: define {{.*}}@main(
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