struct Adder {
    var base: Int
    func /*test:def*/<keywordBase>callAsFunction</keywordBase>(<arglabel index=0>_</arglabel><param index=0> x</param>: Int) -> Int {
        return base + x
    }
}

let add3 = Adder(base: 3)
_ = add3/*test:call*/(<callcombo index=0></callcombo>10)
_ = add3 . /*test:call*/<keywordBase>callAsFunction</keywordBase>(<callcombo index=0></callcombo>10)
_ = add3 . /*test:ref*/<keywordBase>callAsFunction</keywordBase>(<sel index=0>_</sel>:)
_ = add3 . /*test:ref*/<keywordBase>callAsFunction</keywordBase>