X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Futil%2Findexed_map.rs;h=39565f048c07a25f30a6749b5057a55a15278664;hb=bedc2c64fcfe5fa5f85ded630e9ed2eb3c3651eb;hp=3d45172517db3e706dcbf4884dd75923c872c8a5;hpb=62a88f97de725c366665a34c8183747024970fa6;p=rust-lightning

diff --git a/lightning/src/util/indexed_map.rs b/lightning/src/util/indexed_map.rs
index 3d451725..39565f04 100644
--- a/lightning/src/util/indexed_map.rs
+++ b/lightning/src/util/indexed_map.rs
@@ -21,6 +21,8 @@ use core::ops::{Bound, RangeBounds};
 /// actually backed by a [`HashMap`], with some additional tracking to ensure we can iterate over
 /// keys in the order defined by [`Ord`].
 ///
+/// This is not exported to bindings users as bindings provide alternate accessors rather than exposing maps directly.
+///
 /// [`BTreeMap`]: alloc::collections::BTreeMap
 #[derive(Clone, Debug, Eq)]
 pub struct IndexedMap<K: Hash + Ord, V> {
@@ -37,6 +39,14 @@ impl<K: Clone + Hash + Ord, V> IndexedMap<K, V> {
 		}
 	}
 
+	/// Constructs a new, empty map with the given capacity pre-allocated
+	pub fn with_capacity(capacity: usize) -> Self {
+		Self {
+			map: HashMap::with_capacity(capacity),
+			keys: Vec::with_capacity(capacity),
+		}
+	}
+
 	#[inline(always)]
 	/// Fetches the element with the given `key`, if one exists.
 	pub fn get(&self, key: &K) -> Option<&V> {
@@ -147,6 +157,8 @@ impl<K: Hash + Ord + PartialEq, V: PartialEq> PartialEq for IndexedMap<K, V> {
 }
 
 /// An iterator over a range of values in an [`IndexedMap`]
+///
+/// This is not exported to bindings users as bindings provide alternate accessors rather than exposing maps directly.
 pub struct Range<'a, K: Hash + Ord, V> {
 	inner_range: Iter<'a, K>,
 	map: &'a HashMap<K, V>,
@@ -161,6 +173,8 @@ impl<'a, K: Hash + Ord, V: 'a> Iterator for Range<'a, K, V> {
 }
 
 /// An [`Entry`] for a key which currently has no value
+///
+/// This is not exported to bindings users as bindings provide alternate accessors rather than exposing maps directly.
 pub struct VacantEntry<'a, K: Hash + Ord, V> {
 	#[cfg(feature = "hashbrown")]
 	underlying_entry: hash_map::VacantEntry<'a, K, V, hash_map::DefaultHashBuilder>,
@@ -171,6 +185,8 @@ pub struct VacantEntry<'a, K: Hash + Ord, V> {
 }
 
 /// An [`Entry`] for an existing key-value pair
+///
+/// This is not exported to bindings users as bindings provide alternate accessors rather than exposing maps directly.
 pub struct OccupiedEntry<'a, K: Hash + Ord, V> {
 	#[cfg(feature = "hashbrown")]
 	underlying_entry: hash_map::OccupiedEntry<'a, K, V, hash_map::DefaultHashBuilder>,
@@ -181,6 +197,8 @@ pub struct OccupiedEntry<'a, K: Hash + Ord, V> {
 
 /// A mutable reference to a position in the map. This can be used to reference, add, or update the
 /// value at a fixed key.
+///
+/// This is not exported to bindings users as bindings provide alternate accessors rather than exposing maps directly.
 pub enum Entry<'a, K: Hash + Ord, V> {
 	/// A mutable reference to a position within the map where there is no value.
 	Vacant(VacantEntry<'a, K, V>),