Rollup of 15 pull requests

src/libcore/alloc.rs

@@ -338,7 +338,7 @@ pub struct LayoutErr {
 // (we need this for downstream impl of trait Error)
 #[stable(feature = "alloc_layout", since = "1.28.0")]
 impl fmt::Display for LayoutErr {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str("invalid parameters to Layout::from_size_align")
     }
 }
@@ -354,7 +354,7 @@ pub struct AllocErr;
 // (we need this for downstream impl of trait Error)
 #[unstable(feature = "allocator_api", issue = "32838")]
 impl fmt::Display for AllocErr {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str("memory allocation failed")
     }
 }
@@ -376,7 +376,7 @@ impl CannotReallocInPlace {
 // (we need this for downstream impl of trait Error)
 #[unstable(feature = "allocator_api", issue = "32838")]
 impl fmt::Display for CannotReallocInPlace {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "{}", self.description())
     }
 }

src/libcore/any.rs

@@ -107,7 +107,7 @@ impl<T: 'static + ?Sized > Any for T {
 
 #[stable(feature = "rust1", since = "1.0.0")]
 impl fmt::Debug for dyn Any {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.pad("Any")
     }
 }
@@ -117,14 +117,14 @@ impl fmt::Debug for dyn Any {
 // dispatch works with upcasting.
 #[stable(feature = "rust1", since = "1.0.0")]
 impl fmt::Debug for dyn Any + Send {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.pad("Any")
     }
 }
 
 #[stable(feature = "any_send_sync_methods", since = "1.28.0")]
 impl fmt::Debug for dyn Any + Send + Sync {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.pad("Any")
     }
 }

src/libcore/array.rs

@@ -55,7 +55,7 @@ pub struct TryFromSliceError(());
 
 impl fmt::Display for TryFromSliceError {
     #[inline]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(self.__description(), f)
     }
 }
@@ -184,7 +184,7 @@ macro_rules! array_impls {
 
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<T: fmt::Debug> fmt::Debug for [T; $N] {
-                fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                     fmt::Debug::fmt(&&self[..], f)
                 }
             }

src/libcore/ascii.rs

@@ -131,7 +131,7 @@ impl FusedIterator for EscapeDefault {}
 
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for EscapeDefault {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.pad("EscapeDefault { .. }")
     }
 }

src/libcore/cell.rs

@@ -577,14 +577,14 @@ pub struct BorrowError {
 
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Debug for BorrowError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("BorrowError").finish()
     }
 }
 
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Display for BorrowError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         Display::fmt("already mutably borrowed", f)
     }
 }
@@ -597,14 +597,14 @@ pub struct BorrowMutError {
 
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Debug for BorrowMutError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("BorrowMutError").finish()
     }
 }
 
 #[stable(feature = "try_borrow", since = "1.13.0")]
 impl Display for BorrowMutError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         Display::fmt("already borrowed", f)
     }
 }
@@ -788,7 +788,7 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
-    pub fn borrow(&self) -> Ref<T> {
+    pub fn borrow(&self) -> Ref<'_, T> {
         self.try_borrow().expect("already mutably borrowed")
     }
 
@@ -819,7 +819,7 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[stable(feature = "try_borrow", since = "1.13.0")]
     #[inline]
-    pub fn try_borrow(&self) -> Result<Ref<T>, BorrowError> {
+    pub fn try_borrow(&self) -> Result<Ref<'_, T>, BorrowError> {
         match BorrowRef::new(&self.borrow) {
             Some(b) => Ok(Ref {
                 value: unsafe { &*self.value.get() },
@@ -869,7 +869,7 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[inline]
-    pub fn borrow_mut(&self) -> RefMut<T> {
+    pub fn borrow_mut(&self) -> RefMut<'_, T> {
         self.try_borrow_mut().expect("already borrowed")
     }
 
@@ -897,7 +897,7 @@ impl<T: ?Sized> RefCell<T> {
     /// ```
     #[stable(feature = "try_borrow", since = "1.13.0")]
     #[inline]
-    pub fn try_borrow_mut(&self) -> Result<RefMut<T>, BorrowMutError> {
+    pub fn try_borrow_mut(&self) -> Result<RefMut<'_, T>, BorrowMutError> {
         match BorrowRefMut::new(&self.borrow) {
             Some(b) => Ok(RefMut {
                 value: unsafe { &mut *self.value.get() },
@@ -1245,7 +1245,7 @@ impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Ref<'b, U>> for Ref<'b,
 
 #[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<T: ?Sized + fmt::Display> fmt::Display for Ref<'_, T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.value.fmt(f)
     }
 }
@@ -1402,7 +1402,7 @@ impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<RefMut<'b, U>> for RefM
 
 #[stable(feature = "std_guard_impls", since = "1.20.0")]
 impl<T: ?Sized + fmt::Display> fmt::Display for RefMut<'_, T> {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.value.fmt(f)
     }
 }

src/libcore/char/convert.rs

@@ -193,7 +193,7 @@ enum CharErrorKind {
 
 #[stable(feature = "char_from_str", since = "1.20.0")]
 impl fmt::Display for ParseCharError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.__description().fmt(f)
     }
 }
@@ -240,7 +240,7 @@ pub struct CharTryFromError(());
 
 #[stable(feature = "try_from", since = "1.34.0")]
 impl fmt::Display for CharTryFromError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         "converted integer out of range for `char`".fmt(f)
     }
 }
@@ -316,4 +316,3 @@ pub fn from_digit(num: u32, radix: u32) -> Option<char> {
         None
     }
 }
-

src/libcore/char/decode.rs

@@ -128,7 +128,7 @@ impl DecodeUtf16Error {
 
 #[stable(feature = "decode_utf16", since = "1.9.0")]
 impl fmt::Display for DecodeUtf16Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "unpaired surrogate found: {:x}", self.code)
     }
 }

src/libcore/char/mod.rs

@@ -220,7 +220,7 @@ impl FusedIterator for EscapeUnicode {}
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
 impl fmt::Display for EscapeUnicode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         for c in self.clone() {
             f.write_char(c)?;
         }
@@ -333,7 +333,7 @@ impl FusedIterator for EscapeDefault {}
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
 impl fmt::Display for EscapeDefault {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         for c in self.clone() {
             f.write_char(c)?;
         }
@@ -367,7 +367,7 @@ impl FusedIterator for EscapeDebug {}
 
 #[stable(feature = "char_escape_debug", since = "1.20.0")]
 impl fmt::Display for EscapeDebug {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0, f)
     }
 }
@@ -482,7 +482,7 @@ impl Iterator for CaseMappingIter {
 }
 
 impl fmt::Display for CaseMappingIter {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match *self {
             CaseMappingIter::Three(a, b, c) => {
                 f.write_char(a)?;
@@ -503,14 +503,14 @@ impl fmt::Display for CaseMappingIter {
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
 impl fmt::Display for ToLowercase {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0, f)
     }
 }
 
 #[stable(feature = "char_struct_display", since = "1.16.0")]
 impl fmt::Display for ToUppercase {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0, f)
     }
 }

src/libcore/ffi.rs

@@ -39,7 +39,7 @@ pub enum c_void {
 
 #[stable(feature = "std_debug", since = "1.16.0")]
 impl fmt::Debug for c_void {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.pad("c_void")
     }
 }
@@ -62,7 +62,7 @@ extern {
           all(target_arch = "aarch64", target_os = "ios"),
           windows))]
 impl fmt::Debug for VaListImpl {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "va_list* {:p}", self)
     }
 }
@@ -212,7 +212,7 @@ impl<'a> VaList<'a> {
 extern "rust-intrinsic" {
     /// Destroy the arglist `ap` after initialization with `va_start` or
     /// `va_copy`.
-    fn va_end(ap: &mut VaList);
+    fn va_end(ap: &mut VaList<'_>);
 
     /// Copies the current location of arglist `src` to the arglist `dst`.
     #[cfg(any(all(not(target_arch = "aarch64"), not(target_arch = "powerpc"),
@@ -222,9 +222,9 @@ extern "rust-intrinsic" {
     fn va_copy<'a>(src: &VaList<'a>) -> VaList<'a>;
     #[cfg(all(any(target_arch = "aarch64", target_arch = "powerpc", target_arch = "x86_64"),
               not(windows), not(all(target_arch = "aarch64", target_os = "ios"))))]
-    fn va_copy(src: &VaList) -> VaListImpl;
+    fn va_copy(src: &VaList<'_>) -> VaListImpl;
 
     /// Loads an argument of type `T` from the `va_list` `ap` and increment the
     /// argument `ap` points to.
-    fn va_arg<T: sealed_trait::VaArgSafe>(ap: &mut VaList) -> T;
+    fn va_arg<T: sealed_trait::VaArgSafe>(ap: &mut VaList<'_>) -> T;
 }

src/libcore/fmt/builders.rs

@@ -6,7 +6,7 @@ struct PadAdapter<'a> {
 }
 
 impl<'a> PadAdapter<'a> {
-    fn wrap<'b, 'c: 'a+'b>(fmt: &'c mut fmt::Formatter, slot: &'b mut Option<Self>)
+    fn wrap<'b, 'c: 'a+'b>(fmt: &'c mut fmt::Formatter<'_>, slot: &'b mut Option<Self>)
                         -> fmt::Formatter<'b> {
         fmt.wrap_buf(move |buf| {
             *slot = Some(PadAdapter {