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* Introduce diagnostics that explain why derivation of Encodable/Decodable fail rather than just silently failing * Allow properties with default values to be omitted from CodingKeys enum and from encoding/decoding * If `CodingKeys` is a typealias, reach through it more consistently to get at the final target type * Add unit tests to confirm this new behavior for classes and structs NOTE: Although this made the diff bigger, standalone variables named "type" have been renamed to "target" throughout, since the word "type" may be ambiguous and makes debugging impossible. "target" is unique.
53 lines
2.4 KiB
Swift
53 lines
2.4 KiB
Swift
// RUN: %target-typecheck-verify-swift -verify-ignore-unknown
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class SimpleClass : Codable {
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var x: Int = 1
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var y: Double = .pi
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static var z: String = "foo"
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}
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// The synthesized CodingKeys type should not be accessible from outside the
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// class.
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let _ = SimpleClass.CodingKeys.self // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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// Classes which inherit from classes that are codable should synthesize Codable
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// conformance as well.
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class SimpleChildClass : SimpleClass {
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var w: Bool = true
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// NOTE: These tests will fail in the future as Codable classes are updated
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// to derive Codable conformance instead of inheriting their
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// superclass's. Classes currently inherit their parent's Codable
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// conformance and we never get the chance to derive a CodingKeys
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// type, nor overridden methods.
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// These lines have to be within the SimpleChildClass type because
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// CodingKeys should be private.
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func foo() {
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// They should receive a synthesized CodingKeys enum.
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// NOTE: This expected error will need to be removed in the future.
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let _ = SimpleChildClass.CodingKeys.self // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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// The enum should have a case for each of the vars.
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// NOTE: This expectedxerror will need to be removed in the future.
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let _ = SimpleChildClass.CodingKeys.w // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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// Inherited vars should not be part of the CodingKeys enum.
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// NOTE: This expected error will need to be updated in the future.
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// Should be `type 'SimpleClass.CodingKeys' has no member 'x'`
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let _ = SimpleChildClass.CodingKeys.x // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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// NOTE: This expected error will need to be updated in the future.
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// Should be `type 'SimpleClass.CodingKeys' has no member 'y'`
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let _ = SimpleChildClass.CodingKeys.y // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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}
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}
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// They should receive synthesized init(from:) and an encode(to:).
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let _ = SimpleChildClass.init(from:)
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let _ = SimpleChildClass.encode(to:)
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// The synthesized CodingKeys type should not be accessible from outside the
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// class.
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let _ = SimpleChildClass.CodingKeys.self // expected-error {{'CodingKeys' is inaccessible due to 'private' protection level}}
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