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