Add AddExtension::layer (#607)

axum/CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
-- None.
+- **added:** `axum::AddExtension::layer` ([#607])
+
+[#607]: https://github.com/tokio-rs/axum/pull/607
 
 # 0.4.2 (06. December, 2021)
 

axum/src/add_extension.rs

@@ -19,7 +19,7 @@ pub struct AddExtensionLayer<T> {
 impl<T> AddExtensionLayer<T> {
     /// Create a new [`AddExtensionLayer`].
     pub fn new(value: T) -> Self {
-        AddExtensionLayer { value }
+        Self { value }
     }
 }
 
@@ -49,6 +49,13 @@ pub struct AddExtension<S, T> {
     value: T,
 }
 
+impl<S, T> AddExtension<S, T> {
+    /// Create a new [`AddExtensionLayer`].
+    pub fn layer(value: T) -> AddExtensionLayer<T> {
+        AddExtensionLayer::new(value)
+    }
+}
+
 impl<ResBody, S, T> Service<Request<ResBody>> for AddExtension<S, T>
 where
     S: Service<Request<ResBody>>,