1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use std::cmp::{Ord, Ordering, PartialOrd};
12 use std::collections::BTreeMap;
13 use std::iter::Iterator;
15 #[derive(Eq, Hash, Debug, Ord, PartialEq, PartialOrd)]
22 let mut tester = BTreeMap::new();
23 assert_eq!(tester.len(), 0);
25 tester.insert(Zst, ());
27 assert_eq!(tester.len(), if len == 0 { 0 } else { 1 });
28 assert_eq!(tester.iter().count(), if len == 0 { 0 } else { 1 });
29 assert_eq!(tester.get(&Zst).is_some(), len > 0);