// Copyright 2014 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 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. #[derive(Show)] struct MyStruct; trait Repro { fn repro(self, s: MyStruct) -> String; } impl<F> Repro for F where F: FnOnce(MyStruct) -> String { fn repro(self, s: MyStruct) -> String { self(s) } } fn do_stuff<R: Repro>(r: R) -> String { r.repro(MyStruct) } pub fn main() { assert_eq!("MyStruct".to_string(), do_stuff(|: s: MyStruct| format!("{:?}", s))); }