util: Remove ServiceExt::ready (#507)

tower/CHANGELOG.md

@@ -9,15 +9,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Added `MakeService::into_service` and `MakeService::as_service` for
   converting `MakeService`s into `Service`s.
-- Make `ServiceBuilder::service` take `self` by reference rather than by value.
 
 ### Changed
 
- - All middleware `tower-*` crates were merged into `tower` and placed
-   behind feature flags.
+- All middleware `tower-*` crates were merged into `tower` and placed
+  behind feature flags.
+- Make `ServiceBuilder::service` take `self` by reference rather than by value.
 
 ### Removed
 
+- Remove `ServiceExt::ready`.
+
 # 0.3.1 (January 17, 2020)
 
 - Allow opting out of tracing/log (#410).

tower/src/util/mod.rs

@@ -27,7 +27,7 @@ pub use self::{
     map_result::{MapResult, MapResultLayer},
     oneshot::Oneshot,
     optional::Optional,
-    ready::{Ready, ReadyAnd, ReadyOneshot},
+    ready::{ReadyAnd, ReadyOneshot},
     service_fn::{service_fn, ServiceFn},
     then::{Then, ThenLayer},
     try_map_request::{TryMapRequest, TryMapRequestLayer},
@@ -55,16 +55,6 @@ pub mod future {
 /// An extension trait for `Service`s that provides a variety of convenient
 /// adapters
 pub trait ServiceExt<Request>: tower_service::Service<Request> {
-    /// Resolves when the service is ready to accept a request.
-    #[deprecated(since = "0.3.1", note = "prefer `ready_and` which yields the service")]
-    fn ready(&mut self) -> Ready<'_, Self, Request>
-    where
-        Self: Sized,
-    {
-        #[allow(deprecated)]
-        Ready::new(self)
-    }
-
     /// Yields a mutable reference to the service when it is ready to accept a request.
     fn ready_and(&mut self) -> ReadyAnd<'_, Self, Request>
     where

tower/src/util/ready.rs

@@ -97,45 +97,3 @@ where
         f.debug_tuple("ReadyAnd").field(&self.0).finish()
     }
 }
-
-// ==== deprecated `Ready` that is just `ReadyAnd` with a unit return type.
-
-/// A future that resolves when a `Service` is ready to accept a request.
-///
-/// `Ready` values are produced by `ServiceExt::ready`.
-pub struct Ready<'a, T, Request>(ReadyAnd<'a, T, Request>);
-
-// Safety: This is safe for the same reason that the impl for ReadyOneshot is safe.
-impl<'a, T, Request> Unpin for Ready<'a, T, Request> {}
-
-impl<'a, T, Request> Ready<'a, T, Request>
-where
-    T: Service<Request>,
-{
-    #[allow(missing_docs)]
-    #[deprecated(since = "0.3.1", note = "prefer `ReadyAnd` which yields the service")]
-    pub fn new(service: &'a mut T) -> Self {
-        Self(ReadyAnd::new(service))
-    }
-}
-
-impl<'a, T, Request> Future for Ready<'a, T, Request>
-where
-    T: Service<Request>,
-{
-    type Output = Result<(), T::Error>;
-
-    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-        let _ = ready!(Pin::new(&mut self.0).poll(cx));
-        Poll::Ready(Ok(()))
-    }
-}
-
-impl<'a, T, Request> fmt::Debug for Ready<'a, T, Request>
-where
-    T: fmt::Debug,
-{
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_tuple("Ready").field(&self.0).finish()
-    }
-}