// Copyright 2012 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. // pretty-expanded FIXME #23616 #![feature(unboxed_closures)] use std::ops::FnMut; pub fn main() { let mut f = |x: isize, y: isize| -> isize { x + y }; let z = f(1, 2); assert_eq!(z, 3); }