#[must_use] all the things! (#1809)

axum-core/CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 # Unreleased
 
-- None.
+- **fixed:** Add `#[must_use]` attributes to types that do nothing unless used ([#1809])
+
+[#1809]: https://github.com/tokio-rs/axum/pull/1809
 
 # 0.3.2 (20. January, 2023)
 

axum-core/src/extract/default_body_limit.rs

@@ -73,6 +73,7 @@ use tower_layer::Layer;
 /// [`RequestExt::with_limited_body`]: crate::RequestExt::with_limited_body
 /// [`RequestExt::into_limited_body`]: crate::RequestExt::into_limited_body
 #[derive(Debug, Clone)]
+#[must_use]
 pub struct DefaultBodyLimit {
     kind: DefaultBodyLimitKind,
 }

axum-core/src/response/append_headers.rs

@@ -30,6 +30,7 @@ use std::fmt;
 /// }
 /// ```
 #[derive(Debug)]
+#[must_use]
 pub struct AppendHeaders<I>(pub I);
 
 impl<I, K, V> IntoResponse for AppendHeaders<I>