test/libsolidity/syntaxTests/nameAndTypeResolution/257_using_for_by_name.sol


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library D { struct s { uint a; } function mul(s storage self, uint x) public returns (uint) { return self.a *= x; } }
contract C {
    using D for D.s;
    D.s x;
    function f(uint a) public returns (uint) {
        return x.mul({x: a});
    }
}