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duplicate() is just extend(id).

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Rob Rix 2015-10-14 10:24:16 -04:00
parent 5015238546
commit fa2bfcd367
1 changed files with 4 additions and 1 deletions
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5
prototype/Doubt/Cofree.swift
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@ -44,6 +44,9 @@ extension Cofree {
/// Returns a new `Cofree` constructed by recursively annotating each subtree with itself. /// Returns a new `Cofree` constructed by recursively annotating each subtree with itself.
public var duplicate: Cofree<A, Cofree<A, B>> { public var duplicate: Cofree<A, Cofree<A, B>> {
return .Unroll(self, unwrap.map { $0.duplicate }) return extend(id)
} }
} }
import Prelude