// Copyright 2016 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. struct Foo(T); use std::ops::Add; impl Add for Foo { //~^ ERROR expected trait, found type parameter type Output = usize; fn add(self, rhs: Self) -> Self::Output { unimplemented!(); } } fn main() {}