// 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. fn ho(f: F) -> isize where F: FnOnce(isize) -> isize { let n: isize = f(3); return n; } fn direct(x: isize) -> isize { return x + 1; } pub fn main() { let a: isize = direct(3); // direct let b: isize = ho(direct); // indirect unbound assert_eq!(a, b); }