Created
July 24, 2015 13:46
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| // Library code | |
| class Model { } | |
| protocol Fetchable { | |
| typealias FetchableType | |
| static func fetchAll(sql: String) -> [FetchableType] | |
| } | |
| extension Fetchable where Self : Model, FetchableType == Self { | |
| static func fetchAll(sql: String) -> [FetchableType] { | |
| return [] // bare minimal, for demonstration purpose | |
| } | |
| } | |
| // Userland code | |
| class Parent: Model, Fetchable { | |
| typealias FetchableType = Parent | |
| } | |
| class Child: Parent { | |
| typealias FetchableType = Child | |
| } | |
| func f() { | |
| let parents = Parent.fetchAll("SELECT * FROM ...") // [Parent] | |
| // The line below makes the compiler crash. Comment it and the compiler is happy. | |
| let children = Child.fetchAll("SELECT * FROM ...") // [Children] | |
| } |
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Does not crash in a Playground.
Crashes in a regular swift file with