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Inline stream costs.

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This commit is contained in:
Rob Rix 2015-11-12 15:58:14 -05:00
parent 17b9c0a9ec
commit 5253de2ef5
1 changed files with 1 additions and 1 deletions
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prototype/Doubt/SES.swift
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@ -8,7 +8,7 @@ public func SES<Leaf, Annotation, C: CollectionType>(a: C, _ b: C, cost: Free<Le
if b.isEmpty { return a.map { .Delete($0) } }
func cons(diff: Diff, rest: Memo<Stream<(Diff, Int)>>) -> Stream<(Diff, Int)> {
return .Cons((diff, cost(diff) + costOfStream(rest)), rest)
return .Cons((diff, cost(diff) + (rest.value.first?.1 ?? 0)), rest)
}
func costOfStream(stream: Memo<Stream<(Diff, Int)>>) -> Int {