// 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 foo() -> isize { 22 } pub fn main() { let mut x: Vec isize> = Vec::new(); x.push(foo); assert_eq!((x[0])(), 22); }