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Don’t bother with Iso.

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This commit is contained in:
Rob Rix 2015-09-21 16:46:32 -04:00
parent 13f1d70071
commit 5daa7d4398
1 changed files with 2 additions and 16 deletions
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18
prototype/Doubt/Prism.swift
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@ -28,24 +28,10 @@ extension Prism where To : ArrayConvertible {
},
backward: { To(array: [ $0 ]) })
}
}
public struct Iso<Here, There> {
public init(forward: Here -> There, backward: There -> Here) {
self.forward = forward
self.backward = backward
}
public let forward: Here -> There
public let backward: There -> Here
}
extension Prism where To : ArrayConvertible {
public func map<A>(transform: Iso<To.Element, A>) -> Prism<From, [A]> {
public func map<A>(transform: Prism<To.Element, A>) -> Prism<From, [A]> {
return Prism<From, [A]>(
forward: { self.forward($0)?.array.map(transform.forward) },
forward: { self.forward($0)?.array.flatMap(transform.forward) },
backward: { self.backward(To(array: $0.map(transform.backward))) })
}
}