Auto merge of #2731 - RalfJung:rustup, r=RalfJung

Rustup

15 files changed, 10 insertions, 25 deletions

diff --git a/compiler/rustc_data_structures/src/base_n.rs b/compiler/rustc_data_structures/src/base_n.rs
index 3c7bea27124..4567759c004 100644
--- a/compiler/rustc_data_structures/src/base_n.rs
+++ b/compiler/rustc_data_structures/src/base_n.rs
@@ -9,7 +9,7 @@ pub const MAX_BASE: usize = 64;
 pub const ALPHANUMERIC_ONLY: usize = 62;
 pub const CASE_INSENSITIVE: usize = 36;
 
-const BASE_64: &[u8; MAX_BASE as usize] =
+const BASE_64: &[u8; MAX_BASE] =
     b"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@$";
 
 #[inline]
diff --git a/compiler/rustc_data_structures/src/fingerprint.rs b/compiler/rustc_data_structures/src/fingerprint.rs
index d98f4e43fe8..b6e866f15ef 100644
--- a/compiler/rustc_data_structures/src/fingerprint.rs
+++ b/compiler/rustc_data_structures/src/fingerprint.rs
@@ -1,6 +1,5 @@
 use crate::stable_hasher;
 use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
-use std::convert::TryInto;
 use std::hash::{Hash, Hasher};
 
 #[cfg(test)]
diff --git a/compiler/rustc_data_structures/src/graph/scc/mod.rs b/compiler/rustc_data_structures/src/graph/scc/mod.rs
index 7099ca7eb88..b31092eca98 100644
--- a/compiler/rustc_data_structures/src/graph/scc/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/scc/mod.rs
@@ -9,7 +9,6 @@ use crate::fx::FxHashSet;
 use crate::graph::vec_graph::VecGraph;
 use crate::graph::{DirectedGraph, GraphSuccessors, WithNumEdges, WithNumNodes, WithSuccessors};
 use rustc_index::vec::{Idx, IndexVec};
-use std::cmp::Ord;
 use std::ops::Range;
 
 #[cfg(test)]
diff --git a/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs b/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
index e8efbd09a2c..94232bb7626 100644
--- a/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
+++ b/compiler/rustc_data_structures/src/graph/vec_graph/mod.rs
@@ -1,5 +1,3 @@
-use std::cmp::Ord;
-
 use crate::graph::{DirectedGraph, GraphSuccessors, WithNumEdges, WithNumNodes, WithSuccessors};
 use rustc_index::vec::{Idx, IndexVec};
 
diff --git a/compiler/rustc_data_structures/src/owning_ref/mod.rs b/compiler/rustc_data_structures/src/owning_ref/mod.rs
index 980a540ccba..d1d92b905b8 100644
--- a/compiler/rustc_data_structures/src/owning_ref/mod.rs
+++ b/compiler/rustc_data_structures/src/owning_ref/mod.rs
@@ -867,11 +867,9 @@ where
 /////////////////////////////////////////////////////////////////////////////
 
 use std::borrow::Borrow;
-use std::cmp::{Eq, Ord, Ordering, PartialEq, PartialOrd};
-use std::convert::From;
+use std::cmp::Ordering;
 use std::fmt::{self, Debug};
 use std::hash::{Hash, Hasher};
-use std::marker::{Send, Sync};
 
 impl<O, T: ?Sized> Deref for OwningRef<O, T> {
     type Target = T;
@@ -1096,7 +1094,6 @@ where
 // std types integration and convenience type defs
 /////////////////////////////////////////////////////////////////////////////
 
-use std::boxed::Box;
 use std::cell::{Ref, RefCell, RefMut};
 use std::rc::Rc;
 use std::sync::Arc;
diff --git a/compiler/rustc_data_structures/src/owning_ref/tests.rs b/compiler/rustc_data_structures/src/owning_ref/tests.rs
index 320c03d5139..a9b187c4ce0 100644
--- a/compiler/rustc_data_structures/src/owning_ref/tests.rs
+++ b/compiler/rustc_data_structures/src/owning_ref/tests.rs
@@ -3,7 +3,7 @@
 mod owning_ref {
     use super::super::OwningRef;
     use super::super::{BoxRef, Erased, ErasedBoxRef, RcRef};
-    use std::cmp::{Ord, Ordering, PartialEq, PartialOrd};
+    use std::cmp::Ordering;
     use std::collections::hash_map::DefaultHasher;
     use std::collections::HashMap;
     use std::hash::{Hash, Hasher};
@@ -368,7 +368,7 @@ mod owning_handle {
 mod owning_ref_mut {
     use super::super::BoxRef;
     use super::super::{BoxRefMut, Erased, ErasedBoxRefMut, OwningRefMut};
-    use std::cmp::{Ord, Ordering, PartialEq, PartialOrd};
+    use std::cmp::Ordering;
     use std::collections::hash_map::DefaultHasher;
     use std::collections::HashMap;
     use std::hash::{Hash, Hasher};
diff --git a/compiler/rustc_data_structures/src/profiling.rs b/compiler/rustc_data_structures/src/profiling.rs
index aa7a01eed15..1d4014f05ac 100644
--- a/compiler/rustc_data_structures/src/profiling.rs
+++ b/compiler/rustc_data_structures/src/profiling.rs
@@ -86,7 +86,6 @@ use crate::fx::FxHashMap;
 
 use std::borrow::Borrow;
 use std::collections::hash_map::Entry;
-use std::convert::Into;
 use std::error::Error;
 use std::fs;
 use std::path::Path;
diff --git a/compiler/rustc_data_structures/src/sorted_map.rs b/compiler/rustc_data_structures/src/sorted_map.rs
index d13313dfd0e..05f059c89d5 100644
--- a/compiler/rustc_data_structures/src/sorted_map.rs
+++ b/compiler/rustc_data_structures/src/sorted_map.rs
@@ -1,7 +1,6 @@
 use crate::stable_hasher::{HashStable, StableHasher, StableOrd};
 use std::borrow::Borrow;
 use std::cmp::Ordering;
-use std::iter::FromIterator;
 use std::mem;
 use std::ops::{Bound, Index, IndexMut, RangeBounds};
 
@@ -127,13 +126,13 @@ impl<K: Ord, V> SortedMap<K, V> {
     /// Iterate over the keys, sorted
     #[inline]
     pub fn keys(&self) -> impl Iterator<Item = &K> + ExactSizeIterator + DoubleEndedIterator {
-        self.data.iter().map(|&(ref k, _)| k)
+        self.data.iter().map(|(k, _)| k)
     }
 
     /// Iterate over values, sorted by key
     #[inline]
     pub fn values(&self) -> impl Iterator<Item = &V> + ExactSizeIterator + DoubleEndedIterator {
-        self.data.iter().map(|&(_, ref v)| v)
+        self.data.iter().map(|(_, v)| v)
     }
 
     #[inline]
@@ -223,7 +222,7 @@ impl<K: Ord, V> SortedMap<K, V> {
         K: Borrow<Q>,
         Q: Ord + ?Sized,
     {
-        self.data.binary_search_by(|&(ref x, _)| x.borrow().cmp(key))
+        self.data.binary_search_by(|(x, _)| x.borrow().cmp(key))
     }
 
     #[inline]
@@ -301,7 +300,7 @@ impl<K: Ord, V> FromIterator<(K, V)> for SortedMap<K, V> {
     fn from_iter<T: IntoIterator<Item = (K, V)>>(iter: T) -> Self {
         let mut data: Vec<(K, V)> = iter.into_iter().collect();
 
-        data.sort_unstable_by(|&(ref k1, _), &(ref k2, _)| k1.cmp(k2));
+        data.sort_unstable_by(|(k1, _), (k2, _)| k1.cmp(k2));
         data.dedup_by(|&mut (ref k1, _), &mut (ref k2, _)| k1.cmp(k2) == Ordering::Equal);
 
         SortedMap { data }
diff --git a/compiler/rustc_data_structures/src/sorted_map/index_map.rs b/compiler/rustc_data_structures/src/sorted_map/index_map.rs
index c2f0ae32896..7af5c14942a 100644
--- a/compiler/rustc_data_structures/src/sorted_map/index_map.rs
+++ b/compiler/rustc_data_structures/src/sorted_map/index_map.rs
@@ -1,7 +1,6 @@
 //! A variant of `SortedMap` that preserves insertion order.
 
 use std::hash::{Hash, Hasher};
-use std::iter::FromIterator;
 
 use crate::stable_hasher::{HashStable, StableHasher};
 use rustc_index::vec::{Idx, IndexVec};
diff --git a/compiler/rustc_data_structures/src/sso/either_iter.rs b/compiler/rustc_data_structures/src/sso/either_iter.rs
index 131eeef4582..bca6c0955b9 100644
--- a/compiler/rustc_data_structures/src/sso/either_iter.rs
+++ b/compiler/rustc_data_structures/src/sso/either_iter.rs
@@ -1,7 +1,5 @@
 use std::fmt;
-use std::iter::ExactSizeIterator;
 use std::iter::FusedIterator;
-use std::iter::Iterator;
 
 /// Iterator which may contain instance of
 /// one of two specific implementations.
diff --git a/compiler/rustc_data_structures/src/sso/map.rs b/compiler/rustc_data_structures/src/sso/map.rs
index ec6a62016a8..7cdac581977 100644
--- a/compiler/rustc_data_structures/src/sso/map.rs
+++ b/compiler/rustc_data_structures/src/sso/map.rs
@@ -3,7 +3,6 @@ use crate::fx::FxHashMap;
 use arrayvec::ArrayVec;
 use std::fmt;
 use std::hash::Hash;
-use std::iter::FromIterator;
 use std::ops::Index;
 
 // For pointer-sized arguments arrays
diff --git a/compiler/rustc_data_structures/src/sso/set.rs b/compiler/rustc_data_structures/src/sso/set.rs
index 406f0270dcc..a4b40138933 100644
--- a/compiler/rustc_data_structures/src/sso/set.rs
+++ b/compiler/rustc_data_structures/src/sso/set.rs
@@ -1,6 +1,5 @@
 use std::fmt;
 use std::hash::Hash;
-use std::iter::FromIterator;
 
 use super::map::SsoHashMap;
 
diff --git a/compiler/rustc_data_structures/src/sync.rs b/compiler/rustc_data_structures/src/sync.rs
index e4f47b22ac3..ed5341c40ef 100644
--- a/compiler/rustc_data_structures/src/sync.rs
+++ b/compiler/rustc_data_structures/src/sync.rs
@@ -138,7 +138,7 @@ cfg_if! {
             }
         }
 
-        pub use std::iter::Iterator as ParallelIterator;
+        pub use Iterator as ParallelIterator;
 
         pub fn par_iter<T: IntoIterator>(t: T) -> T::IntoIter {
             t.into_iter()
diff --git a/compiler/rustc_data_structures/src/tagged_ptr/drop.rs b/compiler/rustc_data_structures/src/tagged_ptr/drop.rs
index d44ccd368b3..b0315c93d93 100644
--- a/compiler/rustc_data_structures/src/tagged_ptr/drop.rs
+++ b/compiler/rustc_data_structures/src/tagged_ptr/drop.rs
@@ -76,7 +76,7 @@ where
     fn drop(&mut self) {
         // No need to drop the tag, as it's Copy
         unsafe {
-            std::mem::drop(P::from_usize(self.raw.pointer_raw()));
+            drop(P::from_usize(self.raw.pointer_raw()));
         }
     }
 }
diff --git a/compiler/rustc_data_structures/src/vec_map.rs b/compiler/rustc_data_structures/src/vec_map.rs
index 86be0bd8775..2417df66bb9 100644
--- a/compiler/rustc_data_structures/src/vec_map.rs
+++ b/compiler/rustc_data_structures/src/vec_map.rs
@@ -1,6 +1,5 @@
 use std::borrow::Borrow;
 use std::fmt::Debug;
-use std::iter::FromIterator;
 use std::slice::Iter;
 use std::vec::IntoIter;