From ac30b18441b6a4b60bf64d28883ba70f360baf99 Mon Sep 17 00:00:00 2001
From: Amey Pawar <138877912+ameyypawar@users.noreply.github.com>
Date: Sun, 21 Jun 2026 23:53:12 +0530
Subject: [PATCH] fix(filter): return AsyncFilterLayer from AsyncFilter::layer
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`AsyncFilter::layer` is documented to wrap services with an `AsyncFilter`
service built from an `AsyncPredicate`, but it returned a `FilterLayer` —
which builds a synchronous `Filter` from a `Predicate` — making the
constructor unusable for its stated purpose. Return `AsyncFilterLayer`
instead, mirroring `Filter::layer`.
---
 tower/src/filter/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tower/src/filter/mod.rs b/tower/src/filter/mod.rs
index 185fa8368..fc065c03c 100644
--- a/tower/src/filter/mod.rs
+++ b/tower/src/filter/mod.rs
@@ -131,8 +131,8 @@ impl<T, U> AsyncFilter<T, U> {
     /// service with the given [`AsyncPredicate`].
     ///
     /// [`Layer`]: crate::Layer
-    pub fn layer(predicate: U) -> FilterLayer<U> {
-        FilterLayer::new(predicate)
+    pub fn layer(predicate: U) -> AsyncFilterLayer<U> {
+        AsyncFilterLayer::new(predicate)
     }
 
     /// Check a `Request` value against this filter's predicate.