rust/src/test/run-pass/call-closure-from-overloaded-op.rs

// 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 <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.

fn foo() -> int { 22 }

pub fn main() {
    let mut x: Vec<extern "Rust" fn() -> int> = Vec::new();
    x.push(foo);
    assert_eq!((x[0])(), 22);
}