rust/src/test/run-pass/iter-map-to-vec.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 inc(+x: uint) -> uint { x + 1 }

fn main() {
    assert [1, 3].map_to_vec(inc) == ~[2, 4];
    assert [1, 2, 3].map_to_vec(inc) == ~[2, 3, 4];
    assert None.map_to_vec(inc) == ~[];
    assert Some(1).map_to_vec(inc) == ~[2];
    assert Some(2).map_to_vec(inc) == ~[3];
}