mirror of https://github.com/rust-lang/rust
26 lines
674 B
Rust
26 lines
674 B
Rust
//@ run-pass
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#![allow(unused_variables)]
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#![allow(unused_imports)]
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use std::cmp::{Ord, Ordering, PartialOrd};
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use std::collections::BTreeMap;
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use std::iter::Iterator;
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#[derive(Eq, Hash, Debug, Ord, PartialEq, PartialOrd)]
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struct Zst;
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fn main() {
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const N: usize = 8;
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for len in 0..N {
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let mut tester = BTreeMap::new();
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assert_eq!(tester.len(), 0);
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for bit in 0..len {
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tester.insert(Zst, ());
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}
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assert_eq!(tester.len(), if len == 0 { 0 } else { 1 });
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assert_eq!(tester.iter().count(), if len == 0 { 0 } else { 1 });
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assert_eq!(tester.get(&Zst).is_some(), len > 0);
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tester.clear();
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}
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}
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