mirror of https://github.com/rust-lang/rust
34 lines
604 B
Rust
34 lines
604 B
Rust
//@ run-pass
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use std::collections::HashMap;
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// This is a fancy one: it uses an external iterator established
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// outside the loop, breaks, then _picks back up_ and continues
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// iterating with it.
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pub fn main() {
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let mut h = HashMap::new();
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let kvs = [(1, 10), (2, 20), (3, 30)];
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for &(k,v) in &kvs {
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h.insert(k,v);
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}
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let mut x = 0;
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let mut y = 0;
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let mut i = h.iter();
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for (&k,&v) in i.by_ref() {
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x += k;
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y += v;
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break;
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}
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for (&k,&v) in i {
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x += k;
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y += v;
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}
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assert_eq!(x, 6);
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assert_eq!(y, 60);
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}
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