Auto merge of #59151 - Centril:rollup, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #58829 (librustc_interface: Update scoped-tls to 1.0)
 - #58876 (Parse lifetimes that start with a number and give specific error)
 - #58908 (Update rand version)
 - #58998 (Fix documentation of from_ne_bytes and from_le_bytes)
 - #59056 (Use lifetime contravariance to elide more lifetimes in core+alloc+std)
 - #59057 (Standardize `Range*` documentation)
 - #59080 (Fix incorrect links in librustc_codegen_llvm documentation)
 - #59083 (Fix #54822 and associated faulty tests)
 - #59093 (Remove precompute_in_scope_traits_hashes)
 - #59101 (Reduces Code Repetitions like `!n >> amt`)
 - #59121 (impl FromIterator for Result: Use assert_eq! instead of assert!)
 - #59124 (Replace assert with assert_eq)
 - #59129 (Visit impl Trait for dead_code lint)
 - #59130 (Note that NonNull does not launder shared references for mutation)
 - #59132 (ignore higher-ranked object bound conditions created by WF)
 - #59138 (Simplify Iterator::{min, max})

Failed merges:

r? @ghost

Author: bors

Cargo.lock

@@ -2747,7 +2747,7 @@ version = "0.0.0"
 dependencies = [
  "graphviz 0.0.0",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
  "rustc_data_structures 0.0.0",
  "rustc_fs_util 0.0.0",
@@ -2778,7 +2778,7 @@ dependencies = [
  "rustc_resolve 0.0.0",
  "rustc_traits 0.0.0",
  "rustc_typeck 0.0.0",
- "scoped-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scoped-tls 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serialize 0.0.0",
  "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntax 0.0.0",

src/liballoc/boxed.rs

@@ -489,7 +489,7 @@ impl<T: ?Sized> From<Box<T>> for Pin<Box<T>> {
 }
 
 #[stable(feature = "box_from_slice", since = "1.17.0")]
-impl<'a, T: Copy> From<&'a [T]> for Box<[T]> {
+impl<T: Copy> From<&[T]> for Box<[T]> {
     /// Converts a `&[T]` into a `Box<[T]>`
     ///
     /// This conversion allocates on the heap
@@ -503,15 +503,15 @@ impl<'a, T: Copy> From<&'a [T]> for Box<[T]> {
     ///
     /// println!("{:?}", boxed_slice);
     /// ```
-    fn from(slice: &'a [T]) -> Box<[T]> {
+    fn from(slice: &[T]) -> Box<[T]> {
         let mut boxed = unsafe { RawVec::with_capacity(slice.len()).into_box() };
         boxed.copy_from_slice(slice);
         boxed
     }
 }
 
 #[stable(feature = "box_from_slice", since = "1.17.0")]
-impl<'a> From<&'a str> for Box<str> {
+impl From<&str> for Box<str> {
     /// Converts a `&str` into a `Box<str>`
     ///
     /// This conversion allocates on the heap
@@ -523,7 +523,7 @@ impl<'a> From<&'a str> for Box<str> {
     /// println!("{}", boxed);
     /// ```
     #[inline]
-    fn from(s: &'a str) -> Box<str> {
+    fn from(s: &str) -> Box<str> {
         unsafe { from_boxed_utf8_unchecked(Box::from(s.as_bytes())) }
     }
 }

src/liballoc/rc.rs

@@ -1145,15 +1145,15 @@ impl<T> From<T> for Rc<T> {
 }
 
 #[stable(feature = "shared_from_slice", since = "1.21.0")]
-impl<'a, T: Clone> From<&'a [T]> for Rc<[T]> {
+impl<T: Clone> From<&[T]> for Rc<[T]> {
     #[inline]
     fn from(v: &[T]) -> Rc<[T]> {
         <Self as RcFromSlice<T>>::from_slice(v)
     }
 }
 
 #[stable(feature = "shared_from_slice", since = "1.21.0")]
-impl<'a> From<&'a str> for Rc<str> {
+impl From<&str> for Rc<str> {
     #[inline]
     fn from(v: &str) -> Rc<str> {
         let rc = Rc::<[u8]>::from(v.as_bytes());

src/liballoc/string.rs

@@ -2172,9 +2172,9 @@ impl AsRef<[u8]> for String {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> From<&'a str> for String {
+impl From<&str> for String {
     #[inline]
-    fn from(s: &'a str) -> String {
+    fn from(s: &str) -> String {
         s.to_owned()
     }
 }

src/liballoc/vec.rs

@@ -2182,25 +2182,25 @@ impl<T> AsMut<[T]> for Vec<T> {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a, T: Clone> From<&'a [T]> for Vec<T> {
+impl<T: Clone> From<&[T]> for Vec<T> {
     #[cfg(not(test))]
-    fn from(s: &'a [T]) -> Vec<T> {
+    fn from(s: &[T]) -> Vec<T> {
         s.to_vec()
     }
     #[cfg(test)]
-    fn from(s: &'a [T]) -> Vec<T> {
+    fn from(s: &[T]) -> Vec<T> {
         crate::slice::to_vec(s)
     }
 }
 
 #[stable(feature = "vec_from_mut", since = "1.19.0")]
-impl<'a, T: Clone> From<&'a mut [T]> for Vec<T> {
+impl<T: Clone> From<&mut [T]> for Vec<T> {
     #[cfg(not(test))]
-    fn from(s: &'a mut [T]) -> Vec<T> {
+    fn from(s: &mut [T]) -> Vec<T> {
         s.to_vec()
     }
     #[cfg(test)]
-    fn from(s: &'a mut [T]) -> Vec<T> {
+    fn from(s: &mut [T]) -> Vec<T> {
         crate::slice::to_vec(s)
     }
 }
@@ -2231,8 +2231,8 @@ impl<T> From<Vec<T>> for Box<[T]> {
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> From<&'a str> for Vec<u8> {
-    fn from(s: &'a str) -> Vec<u8> {
+impl From<&str> for Vec<u8> {
+    fn from(s: &str) -> Vec<u8> {
         From::from(s.as_bytes())
     }
 }

src/libcore/array.rs

@@ -139,7 +139,7 @@ macro_rules! array_impls {
             }
 
             #[stable(feature = "try_from", since = "1.34.0")]
-            impl<'a, T> TryFrom<&'a [T]> for [T; $N] where T: Copy {
+            impl<T> TryFrom<&[T]> for [T; $N] where T: Copy {
                 type Error = TryFromSliceError;
 
                 fn try_from(slice: &[T]) -> Result<[T; $N], TryFromSliceError> {

src/libcore/benches/iter.rs

@@ -35,7 +35,7 @@ fn scatter(x: i32) -> i32 { (x * 31) % 127 }
 fn bench_max_by_key(b: &mut Bencher) {
     b.iter(|| {
         let it = 0..100;
-        it.max_by_key(|&x| scatter(x))
+        it.map(black_box).max_by_key(|&x| scatter(x))
     })
 }
 
@@ -56,7 +56,7 @@ fn bench_max_by_key2(b: &mut Bencher) {
 fn bench_max(b: &mut Bencher) {
     b.iter(|| {
         let it = 0..100;
-        it.map(scatter).max()
+        it.map(black_box).map(scatter).max()
     })
 }
 

src/libcore/cmp.rs

@@ -1004,26 +1004,26 @@ mod impls {
     // & pointers
 
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialEq<&'b B> for &'a A where A: PartialEq<B> {
+    impl<A: ?Sized, B: ?Sized> PartialEq<&B> for &A where A: PartialEq<B> {
         #[inline]
-        fn eq(&self, other: & &'b B) -> bool { PartialEq::eq(*self, *other) }
+        fn eq(&self, other: & &B) -> bool { PartialEq::eq(*self, *other) }
         #[inline]
-        fn ne(&self, other: & &'b B) -> bool { PartialEq::ne(*self, *other) }
+        fn ne(&self, other: & &B) -> bool { PartialEq::ne(*self, *other) }
     }
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialOrd<&'b B> for &'a A where A: PartialOrd<B> {
+    impl<A: ?Sized, B: ?Sized> PartialOrd<&B> for &A where A: PartialOrd<B> {
         #[inline]
-        fn partial_cmp(&self, other: &&'b B) -> Option<Ordering> {
+        fn partial_cmp(&self, other: &&B) -> Option<Ordering> {
             PartialOrd::partial_cmp(*self, *other)
         }
         #[inline]
-        fn lt(&self, other: & &'b B) -> bool { PartialOrd::lt(*self, *other) }
+        fn lt(&self, other: & &B) -> bool { PartialOrd::lt(*self, *other) }
         #[inline]
-        fn le(&self, other: & &'b B) -> bool { PartialOrd::le(*self, *other) }
+        fn le(&self, other: & &B) -> bool { PartialOrd::le(*self, *other) }
         #[inline]
-        fn ge(&self, other: & &'b B) -> bool { PartialOrd::ge(*self, *other) }
+        fn ge(&self, other: & &B) -> bool { PartialOrd::ge(*self, *other) }
         #[inline]
-        fn gt(&self, other: & &'b B) -> bool { PartialOrd::gt(*self, *other) }
+        fn gt(&self, other: & &B) -> bool { PartialOrd::gt(*self, *other) }
     }
     #[stable(feature = "rust1", since = "1.0.0")]
     impl<A: ?Sized> Ord for &A where A: Ord {
@@ -1036,26 +1036,26 @@ mod impls {
     // &mut pointers
 
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialEq<&'b mut B> for &'a mut A where A: PartialEq<B> {
+    impl<A: ?Sized, B: ?Sized> PartialEq<&mut B> for &mut A where A: PartialEq<B> {
         #[inline]
-        fn eq(&self, other: &&'b mut B) -> bool { PartialEq::eq(*self, *other) }
+        fn eq(&self, other: &&mut B) -> bool { PartialEq::eq(*self, *other) }
         #[inline]
-        fn ne(&self, other: &&'b mut B) -> bool { PartialEq::ne(*self, *other) }
+        fn ne(&self, other: &&mut B) -> bool { PartialEq::ne(*self, *other) }
     }
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialOrd<&'b mut B> for &'a mut A where A: PartialOrd<B> {
+    impl<A: ?Sized, B: ?Sized> PartialOrd<&mut B> for &mut A where A: PartialOrd<B> {
         #[inline]
-        fn partial_cmp(&self, other: &&'b mut B) -> Option<Ordering> {
+        fn partial_cmp(&self, other: &&mut B) -> Option<Ordering> {
             PartialOrd::partial_cmp(*self, *other)
         }
         #[inline]
-        fn lt(&self, other: &&'b mut B) -> bool { PartialOrd::lt(*self, *other) }
+        fn lt(&self, other: &&mut B) -> bool { PartialOrd::lt(*self, *other) }
         #[inline]
-        fn le(&self, other: &&'b mut B) -> bool { PartialOrd::le(*self, *other) }
+        fn le(&self, other: &&mut B) -> bool { PartialOrd::le(*self, *other) }
         #[inline]
-        fn ge(&self, other: &&'b mut B) -> bool { PartialOrd::ge(*self, *other) }
+        fn ge(&self, other: &&mut B) -> bool { PartialOrd::ge(*self, *other) }
         #[inline]
-        fn gt(&self, other: &&'b mut B) -> bool { PartialOrd::gt(*self, *other) }
+        fn gt(&self, other: &&mut B) -> bool { PartialOrd::gt(*self, *other) }
     }
     #[stable(feature = "rust1", since = "1.0.0")]
     impl<A: ?Sized> Ord for &mut A where A: Ord {
@@ -1066,18 +1066,18 @@ mod impls {
     impl<A: ?Sized> Eq for &mut A where A: Eq {}
 
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialEq<&'b mut B> for &'a A where A: PartialEq<B> {
+    impl<A: ?Sized, B: ?Sized> PartialEq<&mut B> for &A where A: PartialEq<B> {
         #[inline]
-        fn eq(&self, other: &&'b mut B) -> bool { PartialEq::eq(*self, *other) }
+        fn eq(&self, other: &&mut B) -> bool { PartialEq::eq(*self, *other) }
         #[inline]
-        fn ne(&self, other: &&'b mut B) -> bool { PartialEq::ne(*self, *other) }
+        fn ne(&self, other: &&mut B) -> bool { PartialEq::ne(*self, *other) }
     }
 
     #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, 'b, A: ?Sized, B: ?Sized> PartialEq<&'b B> for &'a mut A where A: PartialEq<B> {
+    impl<A: ?Sized, B: ?Sized> PartialEq<&B> for &mut A where A: PartialEq<B> {
         #[inline]
-        fn eq(&self, other: &&'b B) -> bool { PartialEq::eq(*self, *other) }
+        fn eq(&self, other: &&B) -> bool { PartialEq::eq(*self, *other) }
         #[inline]
-        fn ne(&self, other: &&'b B) -> bool { PartialEq::ne(*self, *other) }
+        fn ne(&self, other: &&B) -> bool { PartialEq::ne(*self, *other) }
     }
 }

src/libcore/internal_macros.rs

@@ -37,21 +37,21 @@ macro_rules! forward_ref_binop {
         }
 
         #[$attr]
-        impl<'a> $imp<&'a $u> for $t {
+        impl $imp<&$u> for $t {
             type Output = <$t as $imp<$u>>::Output;
 
             #[inline]
-            fn $method(self, other: &'a $u) -> <$t as $imp<$u>>::Output {
+            fn $method(self, other: &$u) -> <$t as $imp<$u>>::Output {
                 $imp::$method(self, *other)
             }
         }
 
         #[$attr]
-        impl<'a, 'b> $imp<&'a $u> for &'b $t {
+        impl $imp<&$u> for &$t {
             type Output = <$t as $imp<$u>>::Output;
 
             #[inline]
-            fn $method(self, other: &'a $u) -> <$t as $imp<$u>>::Output {
+            fn $method(self, other: &$u) -> <$t as $imp<$u>>::Output {
                 $imp::$method(*self, *other)
             }
         }
@@ -67,9 +67,9 @@ macro_rules! forward_ref_op_assign {
     };
     (impl $imp:ident, $method:ident for $t:ty, $u:ty, #[$attr:meta]) => {
         #[$attr]
-        impl<'a> $imp<&'a $u> for $t {
+        impl $imp<&$u> for $t {
             #[inline]
-            fn $method(&mut self, other: &'a $u) {
+            fn $method(&mut self, other: &$u) {
                 $imp::$method(self, *other);
             }
         }