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rayfix/taggedType.swift

Last active August 29, 2015 14:22
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taggedType.swift
struct TaggedThing<Tag, Thing> {
var value: Thing
}
protocol A {} // Phantom Type
protocol B {} // Phantom Type
var a = TaggedThing<A, Int>(value: 1)
var b = TaggedThing<B, Int>(value: 2)
a.value // 1
b.value // 2
// a = b compilation error
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