mirror of https://github.com/rust-lang/rust
47 lines
851 B
Rust
47 lines
851 B
Rust
//@ run-pass
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use std::collections::BinaryHeap;
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fn make_pq() -> BinaryHeap<isize> {
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BinaryHeap::from(vec![1,2,3])
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}
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pub fn main() {
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let mut pq = make_pq();
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let mut sum = 0;
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while let Some(x) = pq.pop() {
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sum += x;
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}
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assert_eq!(sum, 6);
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pq = make_pq();
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sum = 0;
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'a: while let Some(x) = pq.pop() {
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sum += x;
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if x == 2 {
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break 'a;
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}
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}
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assert_eq!(sum, 5);
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pq = make_pq();
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sum = 0;
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'a2: while let Some(x) = pq.pop() {
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if x == 3 {
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continue 'a2;
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}
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sum += x;
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}
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assert_eq!(sum, 3);
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let mut pq1 = make_pq();
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sum = 0;
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while let Some(x) = pq1.pop() {
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let mut pq2 = make_pq();
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while let Some(y) = pq2.pop() {
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sum += x * y;
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}
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}
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assert_eq!(sum, 6 + 12 + 18);
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}
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