#17

@dynamicMemberLookup Over a Private Field

★★★

dynamic-member-lookup

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@dynamicMemberLookup
struct Wrap {
    var x = 0
    private var y = 7
    subscript(dynamicMember _: String) -> Int {
        99
    }
}

print(Wrap().y)

Hint

y exists on Wrap. From outside the type, can the compiler see it? If it can't, what's the next thing it tries?

Your answer