24 lines
350 B
Rust
24 lines
350 B
Rust
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//@ check-pass
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use std::collections::{BTreeMap, HashMap};
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trait Map
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where
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for<'a> &'a Self: IntoIterator<Item = (&'a Self::Key, &'a Self::Value)>,
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{
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type Key;
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type Value;
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}
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impl<K, V> Map for HashMap<K, V> {
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type Key = K;
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type Value = V;
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}
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impl<K, V> Map for BTreeMap<K, V> {
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type Key = K;
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type Value = V;
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}
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fn main() {}
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