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Implement coiteration.

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This commit is contained in:
Rob Rix 2015-10-14 10:39:01 -04:00
parent fa2bfcd367
commit 961e9ae7d7
1 changed files with 5 additions and 0 deletions
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5
prototype/Doubt/Cofree.swift
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@ -14,6 +14,11 @@ public enum Cofree<A, B> {
return rest
}
}
public static func coiterate(annotate: B -> Syntax<B, A>)(_ seed: B) -> Cofree {
return .Unroll(seed, annotate(seed).map(coiterate(annotate)))
}
}