refactor: fix warning: lifetime flowing from input to output with different syntax can be confusing

libs/mpmc-channel/src/lib.rs

@@ -43,7 +43,7 @@ impl<T> MPMC<T> {
     }
 
     #[inline]
-    pub fn produce(&self) -> Producer<T> {
+    pub fn produce(&self) -> Producer<'_, T> {
         let guard = self.inner.lock().unwrap();
         Producer {
             cvar: &self.cvar,
@@ -52,15 +52,15 @@ impl<T> MPMC<T> {
     }
 
     #[inline]
-    pub fn consume(&self) -> Consume<T> {
+    pub fn consume(&self) -> Consume<'_, T> {
         let guard = self.inner.lock().unwrap();
         Consume {
             cvar: &self.cvar,
             guard,
         }
     }
 
-    pub fn try_produce(&self) -> Result<Producer<T>, WouldBlock> {
+    pub fn try_produce(&self) -> Result<Producer<'_, T>, WouldBlock> {
         let guard = match self.inner.try_lock() {
             Ok(val) => val,
             Err(TryLockError::WouldBlock) => return Err(WouldBlock),
@@ -72,7 +72,7 @@ impl<T> MPMC<T> {
         })
     }
 
-    pub fn try_consume(&self) -> Result<Consume<T>, WouldBlock> {
+    pub fn try_consume(&self) -> Result<Consume<'_, T>, WouldBlock> {
         let guard = match self.inner.try_lock() {
             Ok(val) => val,
             Err(TryLockError::WouldBlock) => return Err(WouldBlock),

src/net/tcp/split.rs

@@ -21,7 +21,7 @@ pub struct WriteHalf<'a> {
     me: &'a TcpStream,
 }
 
-pub fn split(stream: &mut TcpStream) -> (ReadHalf, WriteHalf) {
+pub fn split(stream: &mut TcpStream) -> (ReadHalf<'_>, WriteHalf<'_>) {
     (ReadHalf { me: stream }, WriteHalf { me: stream })
 }
 

src/net/tcp/stream.rs

@@ -135,7 +135,7 @@ impl TcpStream {
         self.io.set_ttl(ttl)
     }
 
-    pub fn split(&mut self) -> (ReadHalf, WriteHalf) {
+    pub fn split(&mut self) -> (ReadHalf<'_>, WriteHalf<'_>) {
         split(self)
     }
 

src/runtime/handle.rs

@@ -55,7 +55,7 @@ impl Handle {
         crate::future::block_on(fut)
     }
 
-    pub fn enter(&self) -> EnterGuard {
+    pub fn enter(&self) -> EnterGuard<'_> {
         self.ctx.clone().init();
         EnterGuard::new()
     }

src/runtime/multithread/mod.rs

@@ -70,7 +70,7 @@ impl Runtime {
         &self.handle
     }
 
-    pub fn enter(&self) -> EnterGuard {
+    pub fn enter(&self) -> EnterGuard<'_> {
         self.handle.ctx.clone().init();
         EnterGuard::new()
     }