Fix clippy issues and CI

.github/workflows/toolchain.yml

@@ -154,7 +154,7 @@ jobs:
         uses: codecov/codecov-action@v1
         with:
           fail_ci_if_error: true
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         with:
           name: Upload coverage artifact
           path: lcov.info

src/de.rs

@@ -135,7 +135,7 @@ impl<'de> Visitor<'de> for ValueVisitor {
 
 struct NumberVisitor;
 
-impl<'de> Visitor<'de> for NumberVisitor {
+impl Visitor<'_> for NumberVisitor {
     type Value = INumber;
 
     fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
@@ -160,7 +160,7 @@ impl<'de> Visitor<'de> for NumberVisitor {
 
 struct StringVisitor;
 
-impl<'de> Visitor<'de> for StringVisitor {
+impl Visitor<'_> for StringVisitor {
     type Value = IString;
 
     fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {

src/object.rs

@@ -55,7 +55,7 @@ struct SplitHeader<'a> {
     table: &'a [usize],
 }
 
-impl<'a> SplitHeader<'a> {
+impl SplitHeader<'_> {
     fn find_bucket(&self, key: &IString) -> Result<usize, usize> {
         let hash_cap = hash_capacity(self.cap);
         let initial_bucket = hash_bucket(key, hash_cap);
@@ -108,7 +108,7 @@ struct SplitHeaderMut<'a> {
     table: &'a mut [usize],
 }
 
-impl<'a> SplitHeaderMut<'a> {
+impl SplitHeaderMut<'_> {
     fn as_ref(&self) -> SplitHeader {
         SplitHeader {
             cap: self.cap,
@@ -301,7 +301,7 @@ pub struct OccupiedEntry<'a> {
     bucket: usize,
 }
 
-impl<'a> Debug for OccupiedEntry<'a> {
+impl Debug for OccupiedEntry<'_> {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         f.debug_struct("OccupiedEntry")
             .field("key", self.key())
@@ -389,7 +389,7 @@ pub struct VacantEntry<'a> {
     key: IString,
 }
 
-impl<'a> Debug for VacantEntry<'a> {
+impl Debug for VacantEntry<'_> {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         f.debug_struct("OccupiedEntry")
             .field("key", self.key())
@@ -1015,7 +1015,7 @@ impl<'a> Iterator for Iter<'a> {
     }
 }
 
-impl<'a> ExactSizeIterator for Iter<'a> {
+impl ExactSizeIterator for Iter<'_> {
     fn len(&self) -> usize {
         self.0.len()
     }
@@ -1034,7 +1034,7 @@ impl<'a> Iterator for IterMut<'a> {
     }
 }
 
-impl<'a> ExactSizeIterator for IterMut<'a> {
+impl ExactSizeIterator for IterMut<'_> {
     fn len(&self) -> usize {
         self.0.len()
     }

src/thin.rs

@@ -8,7 +8,7 @@ pub struct ThinRef<'a, T> {
     phantom: PhantomData<&'a T>,
 }
 
-impl<'a, T> ThinRef<'a, T> {
+impl<T> ThinRef<'_, T> {
     pub unsafe fn new(ptr: *const T) -> Self {
         Self {
             ptr: NonNull::new_unchecked(ptr as *mut T),
@@ -17,16 +17,16 @@ impl<'a, T> ThinRef<'a, T> {
     }
 }
 
-impl<'a, T> Deref for ThinRef<'a, T> {
+impl<T> Deref for ThinRef<'_, T> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
         unsafe { &*self.ptr() }
     }
 }
 
-impl<'a, T> Copy for ThinRef<'a, T> {}
-impl<'a, T> Clone for ThinRef<'a, T> {
+impl<T> Copy for ThinRef<'_, T> {}
+impl<T> Clone for ThinRef<'_, T> {
     fn clone(&self) -> Self {
         *self
     }
@@ -38,7 +38,7 @@ pub struct ThinMut<'a, T> {
     phantom: PhantomData<&'a mut T>,
 }
 
-impl<'a, T> ThinMut<'a, T> {
+impl<T> ThinMut<'_, T> {
     pub unsafe fn new(ptr: *mut T) -> Self {
         Self {
             ptr: NonNull::new_unchecked(ptr),
@@ -47,7 +47,7 @@ impl<'a, T> ThinMut<'a, T> {
     }
 }
 
-impl<'a, T> Deref for ThinMut<'a, T> {
+impl<T> Deref for ThinMut<'_, T> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
@@ -56,7 +56,7 @@ impl<'a, T> Deref for ThinMut<'a, T> {
     }
 }
 
-impl<'a, T> DerefMut for ThinMut<'a, T> {
+impl<T> DerefMut for ThinMut<'_, T> {
     fn deref_mut(&mut self) -> &mut Self::Target {
         // Safety: `ptr` must be valid
         unsafe { &mut *self.ptr_mut() }

src/value.rs

@@ -141,7 +141,7 @@ pub enum DestructuredMut<'a> {
 #[derive(Debug)]
 pub struct BoolMut<'a>(&'a mut IValue);
 
-impl<'a> BoolMut<'a> {
+impl BoolMut<'_> {
     /// Set the [`IValue`] referenced by this proxy type to either
     /// `true` or `false`.
     pub fn set(&mut self, value: bool) {
@@ -155,7 +155,7 @@ impl<'a> BoolMut<'a> {
     }
 }
 
-impl<'a> Deref for BoolMut<'a> {
+impl Deref for BoolMut<'_> {
     type Target = bool;
     fn deref(&self) -> &bool {
         if self.get() {