config: Introduce MergeWith trait

1 files changed, 18 insertions, 0 deletions

diff --git a/niri-config/src/utils/merge_with.rs b/niri-config/src/utils/merge_with.rs
new file mode 100644
index 00000000..857e2146
--- /dev/null
+++ b/niri-config/src/utils/merge_with.rs
@@ -0,0 +1,18 @@
+pub trait MergeWith<T> {
+    fn merge_with(&mut self, part: &T);
+
+    fn merged_with(mut self, part: &T) -> Self
+    where
+        Self: Sized,
+    {
+        self.merge_with(part);
+        self
+    }
+
+    fn from_part(part: &T) -> Self
+    where
+        Self: Default + Sized,
+    {
+        Self::default().merged_with(part)
+    }
+}