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-rw-r--r--vendor/phf/src/ordered_map.rs312
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+//! An order-preserving immutable map constructed at compile time.
+use core::fmt;
+use core::iter::FusedIterator;
+use core::iter::IntoIterator;
+use core::ops::Index;
+use core::slice;
+use phf_shared::{self, HashKey, PhfBorrow, PhfHash};
+
+/// An order-preserving immutable map constructed at compile time.
+///
+/// Unlike a `Map`, iteration order is guaranteed to match the definition
+/// order.
+///
+/// ## Note
+///
+/// The fields of this struct are public so that they may be initialized by the
+/// `phf_ordered_map!` macro and code generation. They are subject to change at
+/// any time and should never be accessed directly.
+pub struct OrderedMap<K: 'static, V: 'static> {
+ #[doc(hidden)]
+ pub key: HashKey,
+ #[doc(hidden)]
+ pub disps: &'static [(u32, u32)],
+ #[doc(hidden)]
+ pub idxs: &'static [usize],
+ #[doc(hidden)]
+ pub entries: &'static [(K, V)],
+}
+
+impl<K, V> fmt::Debug for OrderedMap<K, V>
+where
+ K: fmt::Debug,
+ V: fmt::Debug,
+{
+ fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt.debug_map().entries(self.entries()).finish()
+ }
+}
+
+impl<'a, K, V, T: ?Sized> Index<&'a T> for OrderedMap<K, V>
+where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+{
+ type Output = V;
+
+ fn index(&self, k: &'a T) -> &V {
+ self.get(k).expect("invalid key")
+ }
+}
+
+impl<K, V> OrderedMap<K, V> {
+ /// Returns the number of entries in the `OrderedMap`.
+ #[inline]
+ pub const fn len(&self) -> usize {
+ self.entries.len()
+ }
+
+ /// Returns true if the `OrderedMap` is empty.
+ #[inline]
+ pub const fn is_empty(&self) -> bool {
+ self.len() == 0
+ }
+
+ /// Returns a reference to the value that `key` maps to.
+ pub fn get<T: ?Sized>(&self, key: &T) -> Option<&V>
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ self.get_entry(key).map(|e| e.1)
+ }
+
+ /// Returns a reference to the map's internal static instance of the given
+ /// key.
+ ///
+ /// This can be useful for interning schemes.
+ pub fn get_key<T: ?Sized>(&self, key: &T) -> Option<&K>
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ self.get_entry(key).map(|e| e.0)
+ }
+
+ /// Determines if `key` is in the `OrderedMap`.
+ pub fn contains_key<T: ?Sized>(&self, key: &T) -> bool
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ self.get(key).is_some()
+ }
+
+ /// Returns the index of the key within the list used to initialize
+ /// the ordered map.
+ pub fn get_index<T: ?Sized>(&self, key: &T) -> Option<usize>
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ self.get_internal(key).map(|(i, _)| i)
+ }
+
+ /// Returns references to both the key and values at an index
+ /// within the list used to initialize the ordered map. See `.get_index(key)`.
+ pub fn index(&self, index: usize) -> Option<(&K, &V)> {
+ self.entries.get(index).map(|&(ref k, ref v)| (k, v))
+ }
+
+ /// Like `get`, but returns both the key and the value.
+ pub fn get_entry<T: ?Sized>(&self, key: &T) -> Option<(&K, &V)>
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ self.get_internal(key).map(|(_, e)| e)
+ }
+
+ fn get_internal<T: ?Sized>(&self, key: &T) -> Option<(usize, (&K, &V))>
+ where
+ T: Eq + PhfHash,
+ K: PhfBorrow<T>,
+ {
+ if self.disps.is_empty() {
+ return None;
+ } //Prevent panic on empty map
+ let hashes = phf_shared::hash(key, &self.key);
+ let idx_index = phf_shared::get_index(&hashes, &*self.disps, self.idxs.len());
+ let idx = self.idxs[idx_index as usize];
+ let entry = &self.entries[idx];
+
+ let b: &T = entry.0.borrow();
+ if b == key {
+ Some((idx, (&entry.0, &entry.1)))
+ } else {
+ None
+ }
+ }
+
+ /// Returns an iterator over the key/value pairs in the map.
+ ///
+ /// Entries are returned in the same order in which they were defined.
+ pub fn entries(&self) -> Entries<'_, K, V> {
+ Entries {
+ iter: self.entries.iter(),
+ }
+ }
+
+ /// Returns an iterator over the keys in the map.
+ ///
+ /// Keys are returned in the same order in which they were defined.
+ pub fn keys(&self) -> Keys<'_, K, V> {
+ Keys {
+ iter: self.entries(),
+ }
+ }
+
+ /// Returns an iterator over the values in the map.
+ ///
+ /// Values are returned in the same order in which they were defined.
+ pub fn values(&self) -> Values<'_, K, V> {
+ Values {
+ iter: self.entries(),
+ }
+ }
+}
+
+impl<'a, K, V> IntoIterator for &'a OrderedMap<K, V> {
+ type Item = (&'a K, &'a V);
+ type IntoIter = Entries<'a, K, V>;
+
+ fn into_iter(self) -> Entries<'a, K, V> {
+ self.entries()
+ }
+}
+
+/// An iterator over the entries in a `OrderedMap`.
+pub struct Entries<'a, K, V> {
+ iter: slice::Iter<'a, (K, V)>,
+}
+
+impl<'a, K, V> Clone for Entries<'a, K, V> {
+ #[inline]
+ fn clone(&self) -> Self {
+ Self {
+ iter: self.iter.clone(),
+ }
+ }
+}
+
+impl<'a, K, V> fmt::Debug for Entries<'a, K, V>
+where
+ K: fmt::Debug,
+ V: fmt::Debug,
+{
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.debug_list().entries(self.clone()).finish()
+ }
+}
+
+impl<'a, K, V> Iterator for Entries<'a, K, V> {
+ type Item = (&'a K, &'a V);
+
+ fn next(&mut self) -> Option<(&'a K, &'a V)> {
+ self.iter.next().map(|e| (&e.0, &e.1))
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ self.iter.size_hint()
+ }
+}
+
+impl<'a, K, V> DoubleEndedIterator for Entries<'a, K, V> {
+ fn next_back(&mut self) -> Option<(&'a K, &'a V)> {
+ self.iter.next_back().map(|e| (&e.0, &e.1))
+ }
+}
+
+impl<'a, K, V> ExactSizeIterator for Entries<'a, K, V> {}
+
+impl<'a, K, V> FusedIterator for Entries<'a, K, V> {}
+
+/// An iterator over the keys in a `OrderedMap`.
+pub struct Keys<'a, K, V> {
+ iter: Entries<'a, K, V>,
+}
+
+impl<'a, K, V> Clone for Keys<'a, K, V> {
+ #[inline]
+ fn clone(&self) -> Self {
+ Self {
+ iter: self.iter.clone(),
+ }
+ }
+}
+
+impl<'a, K, V> fmt::Debug for Keys<'a, K, V>
+where
+ K: fmt::Debug,
+{
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.debug_list().entries(self.clone()).finish()
+ }
+}
+
+impl<'a, K, V> Iterator for Keys<'a, K, V> {
+ type Item = &'a K;
+
+ fn next(&mut self) -> Option<&'a K> {
+ self.iter.next().map(|e| e.0)
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ self.iter.size_hint()
+ }
+}
+
+impl<'a, K, V> DoubleEndedIterator for Keys<'a, K, V> {
+ fn next_back(&mut self) -> Option<&'a K> {
+ self.iter.next_back().map(|e| e.0)
+ }
+}
+
+impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V> {}
+
+impl<'a, K, V> FusedIterator for Keys<'a, K, V> {}
+
+/// An iterator over the values in a `OrderedMap`.
+pub struct Values<'a, K, V> {
+ iter: Entries<'a, K, V>,
+}
+
+impl<'a, K, V> Clone for Values<'a, K, V> {
+ #[inline]
+ fn clone(&self) -> Self {
+ Self {
+ iter: self.iter.clone(),
+ }
+ }
+}
+
+impl<'a, K, V> fmt::Debug for Values<'a, K, V>
+where
+ V: fmt::Debug,
+{
+ fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+ f.debug_list().entries(self.clone()).finish()
+ }
+}
+
+impl<'a, K, V> Iterator for Values<'a, K, V> {
+ type Item = &'a V;
+
+ fn next(&mut self) -> Option<&'a V> {
+ self.iter.next().map(|e| e.1)
+ }
+
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ self.iter.size_hint()
+ }
+}
+
+impl<'a, K, V> DoubleEndedIterator for Values<'a, K, V> {
+ fn next_back(&mut self) -> Option<&'a V> {
+ self.iter.next_back().map(|e| e.1)
+ }
+}
+
+impl<'a, K, V> ExactSizeIterator for Values<'a, K, V> {}
+
+impl<'a, K, V> FusedIterator for Values<'a, K, V> {}
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