Add clippy to CI

.github/workflows/CI.yml

@@ -25,6 +25,7 @@ jobs:
       - ffi-header
       - doc
       - check-external-types
+      - clippy
     steps:
       - run: exit 0
 
@@ -218,7 +219,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@master
@@ -234,3 +235,18 @@ jobs:
 
       - name: check-external-types
         run: cargo check-external-types --config .github/workflows/external-types.toml
+
+  clippy:
+    name: Run clippy
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+
+      - name: Run check
+        run: cargo clippy -- -Aclippy::all -Dclippy::self_named_module_files

src/body/incoming.rs

@@ -170,13 +170,9 @@ impl Body for Incoming {
                 want_tx.send(WANT_READY);
 
                 if !data_rx.is_terminated() {
-                    match ready!(Pin::new(data_rx).poll_next(cx)?) {
-                        Some(chunk) => {
-                            len.sub_if(chunk.len() as u64);
-                            return Poll::Ready(Some(Ok(Frame::data(chunk))));
-                        }
-                        // fall through to trailers
-                        None => (),
+                    if let Some(chunk) = ready!(Pin::new(data_rx).poll_next(cx)?) {
+                        len.sub_if(chunk.len() as u64);
+                        return Poll::Ready(Some(Ok(Frame::data(chunk))));
                     }
                 }
 

src/error.rs

@@ -209,7 +209,7 @@ impl Error {
     pub(crate) fn find_source<E: StdError + 'static>(&self) -> Option<&E> {
         let mut cause = self.source();
         while let Some(err) = cause {
-            if let Some(ref typed) = err.downcast_ref() {
+            if let Some(typed) = err.downcast_ref() {
                 return Some(typed);
             }
             cause = err.source();