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Cofree is a Functor.

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This commit is contained in:
Rob Rix 2015-10-14 10:09:38 -04:00
parent a606d9d798
commit 6774213fcd
1 changed files with 9 additions and 0 deletions
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9
prototype/Doubt/Cofree.swift
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@ -12,6 +12,15 @@ public enum Cofree<A, B> {
} }
// MARK: - Functor
extension Cofree {
public func map<Other>(transform: B -> Other) -> Cofree<A, Other> {
return .Unroll(transform(extract), unwrap.map { $0.map(transform) })
}
}
// MARK: - Comonad // MARK: - Comonad
extension Cofree { extension Cofree {