struct Adder {
    var base: Int
    func /*test:def*/<keywordBase>callAsFunction</keywordBase>(<arglabel index=0>x</arglabel><param index=0></param>: Int, <arglabel index=1>y</arglabel><param index=1></param>: Int) -> Adder {
        return self
    }
}

let add3 = Adder(base: 3)
_ = add3/*test:call*/(<callarg index=0>x</callarg><callcolon index=0>: </callcolon>10, <callarg index=1>y</callarg><callcolon index=1>: </callcolon>11)
_ = add3 . /*test:call*/<keywordBase>callAsFunction</keywordBase>(<callarg index=0>x</callarg><callcolon index=0>: </callcolon>10, <callarg index=1>y</callarg><callcolon index=1>: </callcolon>11)
_ = add3 . /*test:ref*/<keywordBase>callAsFunction</keywordBase>(<sel index=0>x</sel>:<sel index=1>y</sel>:)
_ = add3 . /*test:ref*/<keywordBase>callAsFunction</keywordBase>
_ = (add3 . /*test:call*/<keywordBase>callAsFunction</keywordBase>())/*test:call*/(<callarg index=0>x</callarg><callcolon index=0>: </callcolon>10, <callarg index=1>y</callarg><callcolon index=1>: </callcolon>11)