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May 6, 2018 13:57
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Type-erased Equatable container in Swift 4
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| struct AnyEquatable: Equatable { | |
| let equalTo: (Any) -> Bool | |
| let value: Any | |
| init<V: Equatable>(_ value: V) { | |
| self.value = value | |
| equalTo = { ($0 as? V) == value } | |
| } | |
| static func == (lhs: AnyEquatable, rhs: AnyEquatable) -> Bool { | |
| return lhs.equalTo(rhs.value) | |
| } | |
| } |
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