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Add find_mut_equiv function to std::collections::hashmap::HashMap #15389

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Add find_mut_equiv function to std::collections::hashmap::HashMap #15389

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Add find_mut_equiv function to std::collections::hashmap::HashMap
Bastacyclop Jul 3, 2014
a140d03
Merge branch 'master' of https://github.com/mozilla/rust
Bastacyclop Jul 3, 2014
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13 changes: 13 additions & 0 deletions src/libstd/collections/hashmap.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1361,6 +1361,19 @@ impl<K: Eq + Hash<S>, V, S, H: Hasher<S>> HashMap<K, V, H> {
}
}

/// Return the (mutable) value corresponding to the key in the map, using
/// equivalence.
pub fn find_mut_equiv<'a, Q: Hash<S> + Equiv<K>>(&'a mut self, k: &Q
) -> Option<&'a mut V> {
match self.search_equiv(k) {
Some(idx) => {
let (_, v_ref) = self.table.read_mut(&idx);
Some(v_ref)
}
None => None
}
}

/// An iterator visiting all keys in arbitrary order.
/// Iterator element type is &'a K.
pub fn keys<'a>(&'a self) -> Keys<'a, K, V> {
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