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Recur through pairs of .Keyed nodes with equal keys.

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This commit is contained in:
Rob Rix 2015-10-15 11:45:40 -04:00
parent 52c1b581c6
commit 2dbfd51f15
1 changed files with 3 additions and 0 deletions
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3
prototype/Doubt/Interpreter.swift
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@ -29,6 +29,9 @@ public struct Interpreter<Term: TermType> {
case let (.Indexed(a), .Indexed(b)) where a.count == b.count:
return recur(f(.Indexed(zip(a, b).map(run))))
case let (.Keyed(a), .Keyed(b)) where Array(a.keys) == Array(b.keys):
return recur(f(.Keyed(Dictionary(elements: b.keys.map { ($0, self.run(a[$0]!, b[$0]!)) }))))
default:
return nil
}