foldhash/
convenience.rs

1use super::fast::{FixedState, RandomState};
2
3/// Type alias for [`std::collections::HashMap<K, V, foldhash::fast::RandomState>`].
4pub type HashMap<K, V> = std::collections::HashMap<K, V, RandomState>;
5
6/// Type alias for [`std::collections::HashSet<T, foldhash::fast::RandomState>`].
7pub type HashSet<T> = std::collections::HashSet<T, RandomState>;
8
9/// A convenience extension trait to enable [`HashMap::new`] for hash maps that use `foldhash`.
10pub trait HashMapExt {
11    /// Creates an empty `HashMap`.
12    fn new() -> Self;
13
14    /// Creates an empty `HashMap` with at least the specified capacity.
15    fn with_capacity(capacity: usize) -> Self;
16}
17
18impl<K, V> HashMapExt for std::collections::HashMap<K, V, RandomState> {
19    #[inline(always)]
20    fn new() -> Self {
21        Self::with_hasher(RandomState::default())
22    }
23
24    #[inline(always)]
25    fn with_capacity(capacity: usize) -> Self {
26        Self::with_capacity_and_hasher(capacity, RandomState::default())
27    }
28}
29
30impl<K, V> HashMapExt for std::collections::HashMap<K, V, FixedState> {
31    #[inline(always)]
32    fn new() -> Self {
33        Self::with_hasher(FixedState::default())
34    }
35
36    #[inline(always)]
37    fn with_capacity(capacity: usize) -> Self {
38        Self::with_capacity_and_hasher(capacity, FixedState::default())
39    }
40}
41
42/// A convenience extension trait to enable [`HashSet::new`] for hash sets that use `foldhash`.
43pub trait HashSetExt {
44    /// Creates an empty `HashSet`.
45    fn new() -> Self;
46
47    /// Creates an empty `HashSet` with at least the specified capacity.
48    fn with_capacity(capacity: usize) -> Self;
49}
50
51impl<T> HashSetExt for std::collections::HashSet<T, RandomState> {
52    #[inline(always)]
53    fn new() -> Self {
54        Self::with_hasher(RandomState::default())
55    }
56
57    #[inline(always)]
58    fn with_capacity(capacity: usize) -> Self {
59        Self::with_capacity_and_hasher(capacity, RandomState::default())
60    }
61}
62
63impl<T> HashSetExt for std::collections::HashSet<T, FixedState> {
64    #[inline(always)]
65    fn new() -> Self {
66        Self::with_hasher(FixedState::default())
67    }
68
69    #[inline(always)]
70    fn with_capacity(capacity: usize) -> Self {
71        Self::with_capacity_and_hasher(capacity, FixedState::default())
72    }
73}
foldhash/convenience.rs

foldhash/
convenience.rs
