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use EnumMap;
use Internal;
use core::iter::Extend;
use core::hash::{Hash, Hasher};
use core::ops::{Index, IndexMut};
impl<K: Internal<V>, V> Extend<(K, V)> for EnumMap<K, V> {
fn extend<I: IntoIterator<Item = (K, V)>>(&mut self, iter: I) {
for (key, value) in iter {
self[key] = value;
}
}
}
impl<'a, K, V> Extend<(&'a K, &'a V)> for EnumMap<K, V>
where
K: Internal<V> + Copy,
V: Copy,
{
fn extend<I: IntoIterator<Item = (&'a K, &'a V)>>(&mut self, iter: I) {
self.extend(iter.into_iter().map(|(&key, &value)| (key, value)));
}
}
impl<K: Internal<V>, V> Index<K> for EnumMap<K, V> {
type Output = V;
fn index(&self, key: K) -> &V {
&self.as_slice()[key.to_usize()]
}
}
impl<K: Internal<V>, V> IndexMut<K> for EnumMap<K, V> {
fn index_mut(&mut self, key: K) -> &mut V {
&mut self.as_mut_slice()[key.to_usize()]
}
}
impl<K: Internal<V>, V> Clone for EnumMap<K, V>
where
K::Array: Clone,
{
fn clone(&self) -> Self {
EnumMap {
array: self.array.clone(),
}
}
}
impl<K: Internal<V>, V> Copy for EnumMap<K, V>
where
K::Array: Copy,
{
}
impl<K: Internal<V>, V: PartialEq> PartialEq for EnumMap<K, V> {
fn eq(&self, other: &Self) -> bool {
self.as_slice() == other.as_slice()
}
}
impl<K: Internal<V>, V: Eq> Eq for EnumMap<K, V> {}
impl<K: Internal<V>, V: Hash> Hash for EnumMap<K, V> {
fn hash<H: Hasher>(&self, state: &mut H) {
self.as_slice().hash(state);
}
}
impl<K: Internal<V>, V: Default> Default for EnumMap<K, V> {
fn default() -> Self {
enum_map! { _ => V::default() }
}
}