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Equality of empty diffs.

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This commit is contained in:
Rob Rix 2015-09-16 15:46:45 -04:00
parent d0d53d152a
commit f9023f88b7
1 changed files with 2 additions and 0 deletions
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2
prototype/Doubt/Equatable.swift
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@ -31,6 +31,8 @@ public func == <F: Equatable> (left: Syntax<F>, right: Syntax<F>) -> Bool {
public func == (left: Diff, right: Diff) -> Bool { public func == (left: Diff, right: Diff) -> Bool {
switch (left, right) { switch (left, right) {
case (.Empty, .Empty):
return true
case let (.Patch(a1, b1), .Patch(a2, b2)): case let (.Patch(a1, b1), .Patch(a2, b2)):
return a1 == a2 && b1 == b2 return a1 == a2 && b1 == b2
case let (.Copy(a), .Copy(b)): case let (.Copy(a), .Copy(b)):