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// SPDX-FileCopyrightText: 2017 - 2021 Kamila Borowska <kamila@borowska.pw>
// SPDX-FileCopyrightText: 2021 Bruno Corrêa Zimmermann <brunoczim@gmail.com>
// SPDX-FileCopyrightText: 2021 micycle
// SPDX-FileCopyrightText: 2023 Nicolas Carranza <nicarran@yandex.com>
//
// SPDX-License-Identifier: MIT OR Apache-2.0
use crate::{enum_map, EnumArray, EnumMap};
use core::fmt::{self, Debug, Formatter};
use core::hash::{Hash, Hasher};
use core::iter::{Extend, FromIterator};
use core::ops::{Index, IndexMut};
impl<K: EnumArray<V> + Debug, V: Debug> Debug for EnumMap<K, V> {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
f.debug_map().entries(self).finish()
}
}
impl<K: EnumArray<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: EnumArray<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, V> FromIterator<(K, V)> for EnumMap<K, V>
where
Self: Default,
K: EnumArray<V>,
{
fn from_iter<I: IntoIterator<Item = (K, V)>>(iter: I) -> Self {
let mut map = EnumMap::default();
map.extend(iter);
map
}
}
impl<K: EnumArray<V>, V> Index<K> for EnumMap<K, V> {
type Output = V;
#[inline]
fn index(&self, key: K) -> &V {
&self.as_slice()[key.into_usize()]
}
}
impl<K: EnumArray<V>, V> IndexMut<K> for EnumMap<K, V> {
#[inline]
fn index_mut(&mut self, key: K) -> &mut V {
&mut self.as_mut_slice()[key.into_usize()]
}
}
// Implementations provided by derive attribute are too specific, and put requirements on K.
// This is caused by rust-lang/rust#26925.
impl<K: EnumArray<V>, V> Clone for EnumMap<K, V>
where
K::Array: Clone,
{
#[inline]
fn clone(&self) -> Self {
EnumMap {
array: self.array.clone(),
}
}
}
impl<K: EnumArray<V>, V> Copy for EnumMap<K, V> where K::Array: Copy {}
impl<K: EnumArray<V>, V: PartialEq> PartialEq for EnumMap<K, V> {
#[inline]
fn eq(&self, other: &Self) -> bool {
self.as_slice() == other.as_slice()
}
}
impl<K: EnumArray<V>, V: Eq> Eq for EnumMap<K, V> {}
impl<K: EnumArray<V>, V: Hash> Hash for EnumMap<K, V> {
#[inline]
fn hash<H: Hasher>(&self, state: &mut H) {
self.as_slice().hash(state);
}
}
impl<K: EnumArray<V>, V: Default> Default for EnumMap<K, V> {
#[inline]
fn default() -> Self {
enum_map! { _ => V::default() }
}
}
impl<K: EnumArray<V>, V: PartialOrd> PartialOrd for EnumMap<K, V> {
fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
self.as_slice().partial_cmp(other.as_slice())
}
}
impl<K: EnumArray<V>, V: Ord> Ord for EnumMap<K, V> {
fn cmp(&self, other: &Self) -> core::cmp::Ordering {
self.as_slice().cmp(other.as_slice())
}
}