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-rw-r--r--vendor/ahash-0.7.6/src/hash_set.rs313
1 files changed, 313 insertions, 0 deletions
diff --git a/vendor/ahash-0.7.6/src/hash_set.rs b/vendor/ahash-0.7.6/src/hash_set.rs
new file mode 100644
index 000000000..9766b676f
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+++ b/vendor/ahash-0.7.6/src/hash_set.rs
@@ -0,0 +1,313 @@
+use crate::RandomState;
+use std::collections::{hash_set, HashSet};
+use std::fmt::{self, Debug};
+use std::hash::{BuildHasher, Hash};
+use std::iter::FromIterator;
+use std::ops::{BitAnd, BitOr, BitXor, Deref, DerefMut, Sub};
+
+#[cfg(feature = "serde")]
+use serde::{
+ de::{Deserialize, Deserializer},
+ ser::{Serialize, Serializer},
+};
+
+/// A [`HashSet`](std::collections::HashSet) using [`RandomState`](crate::RandomState) to hash the items.
+/// (Requires the `std` feature to be enabled.)
+#[derive(Clone)]
+pub struct AHashSet<T, S = crate::RandomState>(HashSet<T, S>);
+
+impl<T> From<HashSet<T, crate::RandomState>> for AHashSet<T> {
+ fn from(item: HashSet<T, crate::RandomState>) -> Self {
+ AHashSet(item)
+ }
+}
+
+impl<T> Into<HashSet<T, crate::RandomState>> for AHashSet<T> {
+ fn into(self) -> HashSet<T, crate::RandomState> {
+ self.0
+ }
+}
+
+impl<T> AHashSet<T, RandomState> {
+ pub fn new() -> Self {
+ AHashSet(HashSet::with_hasher(RandomState::default()))
+ }
+
+ pub fn with_capacity(capacity: usize) -> Self {
+ AHashSet(HashSet::with_capacity_and_hasher(capacity, RandomState::default()))
+ }
+}
+
+impl<T, S> AHashSet<T, S>
+where
+ S: BuildHasher,
+{
+ pub fn with_hasher(hash_builder: S) -> Self {
+ AHashSet(HashSet::with_hasher(hash_builder))
+ }
+
+ pub fn with_capacity_and_hasher(capacity: usize, hash_builder: S) -> Self {
+ AHashSet(HashSet::with_capacity_and_hasher(capacity, hash_builder))
+ }
+}
+
+impl<T, S> Deref for AHashSet<T, S> {
+ type Target = HashSet<T, S>;
+ fn deref(&self) -> &Self::Target {
+ &self.0
+ }
+}
+
+impl<T, S> DerefMut for AHashSet<T, S> {
+ fn deref_mut(&mut self) -> &mut Self::Target {
+ &mut self.0
+ }
+}
+
+impl<T, S> PartialEq for AHashSet<T, S>
+where
+ T: Eq + Hash,
+ S: BuildHasher,
+{
+ fn eq(&self, other: &AHashSet<T, S>) -> bool {
+ self.0.eq(&other.0)
+ }
+}
+
+impl<T, S> Eq for AHashSet<T, S>
+where
+ T: Eq + Hash,
+ S: BuildHasher,
+{
+}
+
+impl<T, S> BitOr<&AHashSet<T, S>> for &AHashSet<T, S>
+where
+ T: Eq + Hash + Clone,
+ S: BuildHasher + Default,
+{
+ type Output = AHashSet<T, S>;
+
+ /// Returns the union of `self` and `rhs` as a new `AHashSet<T, S>`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use ahash::AHashSet;
+ ///
+ /// let a: AHashSet<_> = vec![1, 2, 3].into_iter().collect();
+ /// let b: AHashSet<_> = vec![3, 4, 5].into_iter().collect();
+ ///
+ /// let set = &a | &b;
+ ///
+ /// let mut i = 0;
+ /// let expected = [1, 2, 3, 4, 5];
+ /// for x in &set {
+ /// assert!(expected.contains(x));
+ /// i += 1;
+ /// }
+ /// assert_eq!(i, expected.len());
+ /// ```
+ fn bitor(self, rhs: &AHashSet<T, S>) -> AHashSet<T, S> {
+ AHashSet(self.0.bitor(&rhs.0))
+ }
+}
+
+impl<T, S> BitAnd<&AHashSet<T, S>> for &AHashSet<T, S>
+where
+ T: Eq + Hash + Clone,
+ S: BuildHasher + Default,
+{
+ type Output = AHashSet<T, S>;
+
+ /// Returns the intersection of `self` and `rhs` as a new `AHashSet<T, S>`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use ahash::AHashSet;
+ ///
+ /// let a: AHashSet<_> = vec![1, 2, 3].into_iter().collect();
+ /// let b: AHashSet<_> = vec![2, 3, 4].into_iter().collect();
+ ///
+ /// let set = &a & &b;
+ ///
+ /// let mut i = 0;
+ /// let expected = [2, 3];
+ /// for x in &set {
+ /// assert!(expected.contains(x));
+ /// i += 1;
+ /// }
+ /// assert_eq!(i, expected.len());
+ /// ```
+ fn bitand(self, rhs: &AHashSet<T, S>) -> AHashSet<T, S> {
+ AHashSet(self.0.bitand(&rhs.0))
+ }
+}
+
+impl<T, S> BitXor<&AHashSet<T, S>> for &AHashSet<T, S>
+where
+ T: Eq + Hash + Clone,
+ S: BuildHasher + Default,
+{
+ type Output = AHashSet<T, S>;
+
+ /// Returns the symmetric difference of `self` and `rhs` as a new `AHashSet<T, S>`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use ahash::AHashSet;
+ ///
+ /// let a: AHashSet<_> = vec![1, 2, 3].into_iter().collect();
+ /// let b: AHashSet<_> = vec![3, 4, 5].into_iter().collect();
+ ///
+ /// let set = &a ^ &b;
+ ///
+ /// let mut i = 0;
+ /// let expected = [1, 2, 4, 5];
+ /// for x in &set {
+ /// assert!(expected.contains(x));
+ /// i += 1;
+ /// }
+ /// assert_eq!(i, expected.len());
+ /// ```
+ fn bitxor(self, rhs: &AHashSet<T, S>) -> AHashSet<T, S> {
+ AHashSet(self.0.bitxor(&rhs.0))
+ }
+}
+
+impl<T, S> Sub<&AHashSet<T, S>> for &AHashSet<T, S>
+where
+ T: Eq + Hash + Clone,
+ S: BuildHasher + Default,
+{
+ type Output = AHashSet<T, S>;
+
+ /// Returns the difference of `self` and `rhs` as a new `AHashSet<T, S>`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use ahash::AHashSet;
+ ///
+ /// let a: AHashSet<_> = vec![1, 2, 3].into_iter().collect();
+ /// let b: AHashSet<_> = vec![3, 4, 5].into_iter().collect();
+ ///
+ /// let set = &a - &b;
+ ///
+ /// let mut i = 0;
+ /// let expected = [1, 2];
+ /// for x in &set {
+ /// assert!(expected.contains(x));
+ /// i += 1;
+ /// }
+ /// assert_eq!(i, expected.len());
+ /// ```
+ fn sub(self, rhs: &AHashSet<T, S>) -> AHashSet<T, S> {
+ AHashSet(self.0.sub(&rhs.0))
+ }
+}
+
+impl<T, S> Debug for AHashSet<T, S>
+where
+ T: Debug,
+ S: BuildHasher,
+{
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ self.0.fmt(fmt)
+ }
+}
+
+impl<T, S> FromIterator<T> for AHashSet<T, S>
+where
+ T: Eq + Hash,
+ S: BuildHasher + Default,
+{
+ #[inline]
+ fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> AHashSet<T, S> {
+ AHashSet(HashSet::from_iter(iter))
+ }
+}
+
+impl<'a, T, S> IntoIterator for &'a AHashSet<T, S> {
+ type Item = &'a T;
+ type IntoIter = hash_set::Iter<'a, T>;
+ fn into_iter(self) -> Self::IntoIter {
+ (&self.0).iter()
+ }
+}
+
+impl<T, S> IntoIterator for AHashSet<T, S> {
+ type Item = T;
+ type IntoIter = hash_set::IntoIter<T>;
+ fn into_iter(self) -> Self::IntoIter {
+ self.0.into_iter()
+ }
+}
+
+impl<T, S> Extend<T> for AHashSet<T, S>
+where
+ T: Eq + Hash,
+ S: BuildHasher,
+{
+ #[inline]
+ fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) {
+ self.0.extend(iter)
+ }
+}
+
+impl<'a, T, S> Extend<&'a T> for AHashSet<T, S>
+where
+ T: 'a + Eq + Hash + Copy,
+ S: BuildHasher,
+{
+ #[inline]
+ fn extend<I: IntoIterator<Item = &'a T>>(&mut self, iter: I) {
+ self.0.extend(iter)
+ }
+}
+
+impl<T> Default for AHashSet<T, RandomState> {
+ /// Creates an empty `AHashSet<T, S>` with the `Default` value for the hasher.
+ #[inline]
+ fn default() -> AHashSet<T, RandomState> {
+ AHashSet(HashSet::default())
+ }
+}
+
+#[cfg(feature = "serde")]
+impl<T> Serialize for AHashSet<T>
+where
+ T: Serialize + Eq + Hash,
+{
+ fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
+ self.deref().serialize(serializer)
+ }
+}
+
+#[cfg(feature = "serde")]
+impl<'de, T> Deserialize<'de> for AHashSet<T>
+where
+ T: Deserialize<'de> + Eq + Hash,
+{
+ fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
+ let hash_set = HashSet::deserialize(deserializer);
+ hash_set.map(|hash_set| Self(hash_set))
+ }
+}
+
+#[cfg(all(test, feature = "serde"))]
+mod test {
+ use super::*;
+
+ #[test]
+ fn test_serde() {
+ let mut set = AHashSet::new();
+ set.insert("for".to_string());
+ set.insert("bar".to_string());
+ let serialization = serde_json::to_string(&set).unwrap();
+ let deserialization: AHashSet<String> = serde_json::from_str(&serialization).unwrap();
+ assert_eq!(deserialization, set);
+ }
+}
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