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Inline calls to cons.

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This commit is contained in:
Rob Rix 2015-11-12 16:13:23 -05:00
parent 4a356a8a0a
commit 82a8f095cf
1 changed files with 6 additions and 2 deletions
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8
prototype/Doubt/SES.swift
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@ -62,12 +62,16 @@ public func SES<Leaf, Annotation, C: CollectionType>(a: C, _ b: C, cost: Free<Le
// right extent of the edit graph; can only move down
if let down = down {
return cons(Diff.Insert(b[j]), rest: down)
let diff = Diff.Insert(b[j])
let cost = cost(diff) + (down.value.first?.1 ?? 0)
return .Cons((diff, cost), down)
}
// bottom extent of the edit graph; can only move right
if let right = right {
return cons(Diff.Delete(a[i]), rest: right)
let diff = Diff.Delete(a[i])
let cost = cost(diff) + (right.value.first?.1 ?? 0)
return .Cons((diff, cost), right)
}
// bottom-right corner of the edit graph