1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/tower-layer/src/identity.rs b/vendor/tower-layer/src/identity.rs
new file mode 100644
index 00000000..5233a1d8
--- /dev/null
+++ b/vendor/tower-layer/src/identity.rs
@@ -0,0 +1,37 @@
+use super::Layer;
+use std::fmt;
+
+/// A no-op middleware.
+///
+/// When wrapping a [`Service`], the [`Identity`] layer returns the provided
+/// service without modifying it.
+///
+/// [`Service`]: https://docs.rs/tower-service/latest/tower_service/trait.Service.html
+#[derive(Default, Clone)]
+pub struct Identity {
+    _p: (),
+}
+
+impl Identity {
+    /// Create a new [`Identity`] value
+    pub const fn new() -> Identity {
+        Identity { _p: () }
+    }
+}
+
+/// Decorates a [`Service`], transforming either the request or the response.
+///
+/// [`Service`]: https://docs.rs/tower-service/latest/tower_service/trait.Service.html
+impl<S> Layer<S> for Identity {
+    type Service = S;
+
+    fn layer(&self, inner: S) -> Self::Service {
+        inner
+    }
+}
+
+impl fmt::Debug for Identity {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Identity").finish()
+    }
+}