rust/src/test/run-pass/autobind.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 f<T: Copy>(x: ~[T]) -> T { return x[0]; }

fn g(act: fn(~[int]) -> int) -> int { return act(~[1, 2, 3]); }

fn main() {
    assert (g(f) == 1);
    let f1: fn(~[~str]) -> ~str = f;
    assert (f1(~[~"x", ~"y", ~"z"]) == ~"x");
}