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Improved compiler errors for auto-synthesized conformances in Xcode 11
Discover page available: CodableNew in Xcode 11/Swift 5.1: The compiler will now tell you why it can't auto-synthesize conformance to protocols like Encodable and Decodable, instead of just suggesting a manual implementation. Let’s say we have the following type, that we wish to conform to Decodable automatically:
struct ItemMetadata: Decodable {
var date: Date
var format: ItemFormat
var category: String
}If the ItemFormat type used above isn’t Decodable, then the compiler will now give us the following error:
Cannot automatically synthesize 'Decodable' because 'ItemFormat'
does not conform to Decodable.
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