ci: enable clippy lints (#1335)

tokio-threadpool/src/task/blocking.rs

@@ -393,7 +393,7 @@ impl State {
         State((capacity << NUM_SHIFT) | NUM_FLAG)
     }
 
-    fn remaining_capacity(&self) -> usize {
+    fn remaining_capacity(self) -> usize {
         if !self.has_remaining_capacity() {
             return 0;
         }
@@ -401,15 +401,15 @@ impl State {
         self.0 >> 1
     }
 
-    fn has_remaining_capacity(&self) -> bool {
+    fn has_remaining_capacity(self) -> bool {
         self.0 & NUM_FLAG == NUM_FLAG
     }
 
-    fn has_task(&self, stub: &Task) -> bool {
+    fn has_task(self, stub: &Task) -> bool {
         !(self.has_remaining_capacity() || self.is_stub(stub))
     }
 
-    fn is_stub(&self, stub: &Task) -> bool {
+    fn is_stub(self, stub: &Task) -> bool {
         self.0 == stub as *const _ as usize
     }
 
@@ -452,11 +452,11 @@ impl State {
         }
     }
 
-    fn is_ptr(&self) -> bool {
+    fn is_ptr(self) -> bool {
         self.0 & NUM_FLAG == 0
     }
 
-    fn ptr(&self) -> Option<*const Task> {
+    fn ptr(self) -> Option<*const Task> {
         if self.is_ptr() {
             Some(self.0 as *const Task)
         } else {

tokio-threadpool/src/task/blocking_state.rs

@@ -18,26 +18,26 @@ const ALLOCATED: usize = 0b10;
 
 impl BlockingState {
     /// Create a new, default, `BlockingState`.
-    pub fn new() -> BlockingState {
+    pub(crate) fn new() -> BlockingState {
         BlockingState(0)
     }
 
     /// Returns `true` if the state represents the associated task being queued
     /// in the pending blocking capacity channel
-    pub fn is_queued(&self) -> bool {
+    pub(crate) fn is_queued(&self) -> bool {
         self.0 & QUEUED == QUEUED
     }
 
     /// Toggle the queued flag
     ///
     /// Returns the state before the flag has been toggled.
-    pub fn toggle_queued(state: &AtomicUsize, ordering: Ordering) -> BlockingState {
+    pub(crate) fn toggle_queued(state: &AtomicUsize, ordering: Ordering) -> BlockingState {
         state.fetch_xor(QUEUED, ordering).into()
     }
 
     /// Returns `true` if the state represents the associated task having been
     /// allocated capacity to block.
-    pub fn is_allocated(&self) -> bool {
+    pub(crate) fn is_allocated(&self) -> bool {
         self.0 & ALLOCATED == ALLOCATED
     }
 
@@ -46,7 +46,7 @@ impl BlockingState {
     ///
     /// If this returns `true`, then the task has the ability to block for the
     /// duration of the `poll`.
-    pub fn consume_allocation(state: &AtomicUsize, ordering: Ordering) -> CanBlock {
+    pub(crate) fn consume_allocation(state: &AtomicUsize, ordering: Ordering) -> CanBlock {
         let state: Self = state.fetch_and(!ALLOCATED, ordering).into();
 
         if state.is_allocated() {
@@ -58,7 +58,7 @@ impl BlockingState {
         }
     }
 
-    pub fn notify_blocking(state: &AtomicUsize, ordering: Ordering) {
+    pub(crate) fn notify_blocking(state: &AtomicUsize, ordering: Ordering) {
         let prev: Self = state.fetch_xor(ALLOCATED | QUEUED, ordering).into();
 
         debug_assert!(prev.is_queued());

tokio-threadpool/src/task/mod.rs

@@ -134,12 +134,12 @@ impl Task {
 
             let mut g = Guard(fut, true);
 
-            let mut waker = arc_waker::waker(Arc::new(Waker {
+            let waker = arc_waker::waker(Arc::new(Waker {
                 task: me.clone(),
                 pool: pool.clone(),
             }));
 
-            let mut cx = Context::from_waker(&mut waker);
+            let mut cx = Context::from_waker(&waker);
 
             let ret = g.0.as_mut().unwrap().as_mut().poll(&mut cx);
 
@@ -239,7 +239,7 @@ impl Task {
     pub fn schedule(me: &Arc<Self>, pool: &Arc<Pool>) {
         if me.schedule2() {
             let task = me.clone();
-            let _ = pool.submit(task, &pool);
+            pool.submit(task, &pool);
         }
     }
 

tokio-threadpool/src/task/state.rs

@@ -27,11 +27,11 @@ impl State {
     ///
     /// Tasks start in the scheduled state as they are immediately scheduled on
     /// creation.
-    pub fn new() -> State {
+    pub(crate) fn new() -> State {
         State::Scheduled
     }
 
-    pub fn stub() -> State {
+    pub(crate) fn stub() -> State {
         State::Idle
     }
 }