5 files changed, 10 insertions, 5 deletions
diff --git a/src/util/crdt/bool.rs b/src/util/crdt/bool.rs
index 53af8f82..111eb5f1 100644
--- a/src/util/crdt/bool.rs
+++ b/src/util/crdt/bool.rs
@@ -3,7 +3,7 @@ use serde::{Deserialize, Serialize};
 use crate::crdt::crdt::*;
 
 /// Boolean, where `true` is an absorbing state
-#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct Bool(bool);
 
 impl Bool {
diff --git a/src/util/crdt/deletable.rs b/src/util/crdt/deletable.rs
index c76f5cbb..e771aceb 100644
--- a/src/util/crdt/deletable.rs
+++ b/src/util/crdt/deletable.rs
@@ -3,7 +3,7 @@ use serde::{Deserialize, Serialize};
 use crate::crdt::crdt::*;
 
 /// Deletable object (once deleted, cannot go back)
-#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub enum Deletable<T> {
 	Present(T),
 	Deleted,
diff --git a/src/util/crdt/lww.rs b/src/util/crdt/lww.rs
index 254abe8e..958844c9 100644
--- a/src/util/crdt/lww.rs
+++ b/src/util/crdt/lww.rs
@@ -37,7 +37,7 @@ use crate::crdt::crdt::*;
 ///
 /// This scheme is used by AWS S3 or Soundcloud and often without knowing
 /// in enterprise when reconciliating databases with ad-hoc scripts.
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct Lww<T> {
 	ts: u64,
 	v: T,
diff --git a/src/util/crdt/lww_map.rs b/src/util/crdt/lww_map.rs
index c155c3a8..88113856 100644
--- a/src/util/crdt/lww_map.rs
+++ b/src/util/crdt/lww_map.rs
@@ -23,7 +23,7 @@ use crate::crdt::crdt::*;
 /// However, note that even if we were using a more efficient data structure such as a `BTreeMap`,
 /// the serialization cost `O(n)` would still have to be paid at each modification, so we are
 /// actually not losing anything here.
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct LwwMap<K, V> {
 	vals: Vec<(K, u64, V)>,
 }
@@ -140,6 +140,11 @@ where
 		self.vals.clear();
 	}
 
+	/// Retain only values that match a certain predicate
+	pub fn retain(&mut self, pred: impl FnMut(&(K, u64, V)) -> bool) {
+		self.vals.retain(pred);
+	}
+
 	/// Get a reference to the value assigned to a key
 	pub fn get(&self, k: &K) -> Option<&V> {
 		match self.vals.binary_search_by(|(k2, _, _)| k2.cmp(k)) {
diff --git a/src/util/crdt/map.rs b/src/util/crdt/map.rs
index f9ed19b6..5d1e1520 100644
--- a/src/util/crdt/map.rs
+++ b/src/util/crdt/map.rs
@@ -16,7 +16,7 @@ use crate::crdt::crdt::*;
 /// However, note that even if we were using a more efficient data structure such as a `BTreeMap`,
 /// the serialization cost `O(n)` would still have to be paid at each modification, so we are
 /// actually not losing anything here.
-#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
 pub struct Map<K, V> {
 	vals: Vec<(K, V)>,
 }