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// RUN: %target-typecheck-verify-swift -verify-ignore-unknown -swift-version 4
enum Conditional<T> {
case a(x: T, y: T?)
case b(z: [T])
func foo() {
// They should receive a synthesized CodingKeys enum.
let _ = Conditional.CodingKeys.self
let _ = Conditional.ACodingKeys.self
// The enum should have a case for each of the cases.
let _ = Conditional.CodingKeys.a
let _ = Conditional.CodingKeys.b
// The enum should have a case for each of the parameters.
let _ = Conditional.ACodingKeys.x
let _ = Conditional.ACodingKeys.y
let _ = Conditional.BCodingKeys.z
}
}
extension Conditional: Codable where T: Codable { // expected-note 4{{where 'T' = 'Nonconforming'}}
}
// They should receive synthesized init(from:) and an encode(to:).
let _ = Conditional<Int>.init(from:)
let _ = Conditional<Int>.encode(to:)
// but only for Codable parameters.
struct Nonconforming {}
let _ = Conditional<Nonconforming>.init(from:) // expected-error {{referencing initializer 'init(from:)' on 'Conditional' requires that 'Nonconforming' conform to 'Encodable'}}
// expected-error@-1 {{referencing initializer 'init(from:)' on 'Conditional' requires that 'Nonconforming' conform to 'Decodable'}}
let _ = Conditional<Nonconforming>.encode(to:) // expected-error {{referencing instance method 'encode(to:)' on 'Conditional' requires that 'Nonconforming' conform to 'Encodable'}}
// expected-error@-1 {{referencing instance method 'encode(to:)' on 'Conditional' requires that 'Nonconforming' conform to 'Decodable'}}
// The synthesized CodingKeys type should not be accessible from outside the
// enum.
let _ = Conditional<Int>.CodingKeys.self // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
let _ = Conditional<Int>.ACodingKeys.self // expected-error {{'ACodingKeys' is inaccessible due to 'private' protection level}}
let _ = Conditional<Int>.BCodingKeys.self // expected-error {{'BCodingKeys' is inaccessible due to 'private' protection level}}
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