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// 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.
// xfail-test
extern mod std;
use std::map::{map, hashmap, int_hash};
class keys<K: Copy, V: Copy, M: Copy map<K,V>>
: iter::base_iter<K> {
let map: M;
new(map: M) {
self.map = map;
}
fn each(blk: fn(K) -> bool) { self.map.each(|k, _v| blk(k) ) }
fn size_hint() -> option<uint> { some(self.map.size()) }
fn eachi(blk: fn(uint, K) -> bool) { iter::eachi(self, blk) }
}
fn main() {
let m = int_hash();
m.insert(1, 2);
m.insert(3, 4);
assert iter::to_vec(keys(m)) == ~[1, 3];
}
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