Add insta-stable std::hash::{DefaultHasher, RandomState} exports

Author: clarfonthey

Diff for: compiler/rustc_middle/src/ty/error.rs

@@ -7,8 +7,7 @@ use rustc_hir::def_id::DefId;
 use rustc_span::symbol::Symbol;
 use rustc_target::spec::abi;
 use std::borrow::Cow;
-use std::collections::hash_map::DefaultHasher;
-use std::hash::{Hash, Hasher};
+use std::hash::{DefaultHasher, Hash, Hasher};
 use std::path::PathBuf;
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, TypeFoldable, TypeVisitable)]

Diff for: compiler/rustc_session/src/config.rs

@@ -3191,9 +3191,8 @@ pub(crate) mod dep_tracking {
     use rustc_target::spec::{
         RelroLevel, SanitizerSet, SplitDebuginfo, StackProtector, TargetTriple, TlsModel,
     };
-    use std::collections::hash_map::DefaultHasher;
     use std::collections::BTreeMap;
-    use std::hash::Hash;
+    use std::hash::{DefaultHasher, Hash};
     use std::num::NonZeroUsize;
     use std::path::PathBuf;
 

Diff for: compiler/rustc_session/src/options.rs

@@ -18,8 +18,7 @@ use rustc_span::SourceFileHashAlgorithm;
 
 use std::collections::BTreeMap;
 
-use std::collections::hash_map::DefaultHasher;
-use std::hash::Hasher;
+use std::hash::{DefaultHasher, Hasher};
 use std::num::{IntErrorKind, NonZeroUsize};
 use std::path::PathBuf;
 use std::str;

Diff for: compiler/rustc_target/src/spec/mod.rs

@@ -3347,7 +3347,7 @@ impl TargetTriple {
     /// If this target is a path, a hash of the path is appended to the triple returned
     /// by `triple()`.
     pub fn debug_triple(&self) -> String {
-        use std::collections::hash_map::DefaultHasher;
+        use std::hash::DefaultHasher;
 
         match self {
             TargetTriple::TargetTriple(triple) => triple.to_owned(),

Diff for: library/alloc/src/lib.rs

@@ -272,7 +272,7 @@ pub(crate) mod test_helpers {
     /// seed not being the same for every RNG invocation too.
     pub(crate) fn test_rng() -> rand_xorshift::XorShiftRng {
         use std::hash::{BuildHasher, Hash, Hasher};
-        let mut hasher = std::collections::hash_map::RandomState::new().build_hasher();
+        let mut hasher = std::hash::RandomState::new().build_hasher();
         std::panic::Location::caller().hash(&mut hasher);
         let hc64 = hasher.finish();
         let seed_vec =

Diff for: library/alloc/src/vec/mod.rs

@@ -2702,7 +2702,7 @@ impl<T: Clone, A: Allocator + Clone> Clone for Vec<T, A> {
 /// ```
 /// use std::hash::BuildHasher;
 ///
-/// let b = std::collections::hash_map::RandomState::new();
+/// let b = std::hash::RandomState::new();
 /// let v: Vec<u8> = vec![0xa8, 0x3c, 0x09];
 /// let s: &[u8] = &[0xa8, 0x3c, 0x09];
 /// assert_eq!(b.hash_one(v), b.hash_one(s));

Diff for: library/alloc/tests/lib.rs

@@ -43,8 +43,7 @@
 #![deny(fuzzy_provenance_casts)]
 #![deny(unsafe_op_in_unsafe_fn)]
 
-use std::collections::hash_map::DefaultHasher;
-use std::hash::{Hash, Hasher};
+use std::hash::{DefaultHasher, Hash, Hasher};
 
 mod arc;
 mod autotraits;

Diff for: library/core/src/array/mod.rs

@@ -297,7 +297,7 @@ impl<'a, T, const N: usize> TryFrom<&'a mut [T]> for &'a mut [T; N] {
 /// ```
 /// use std::hash::BuildHasher;
 ///
-/// let b = std::collections::hash_map::RandomState::new();
+/// let b = std::hash::RandomState::new();
 /// let a: [u8; 3] = [0xa8, 0x3c, 0x09];
 /// let s: &[u8] = &[0xa8, 0x3c, 0x09];
 /// assert_eq!(b.hash_one(a), b.hash_one(s));

Diff for: library/core/src/hash/mod.rs

@@ -12,8 +12,7 @@
 //! # Examples
 //!
 //! ```rust
-//! use std::collections::hash_map::DefaultHasher;
-//! use std::hash::{Hash, Hasher};
+//! use std::hash::{DefaultHasher, Hash, Hasher};
 //!
 //! #[derive(Hash)]
 //! struct Person {
@@ -46,8 +45,7 @@
 //! the [`Hash`] trait:
 //!
 //! ```rust
-//! use std::collections::hash_map::DefaultHasher;
-//! use std::hash::{Hash, Hasher};
+//! use std::hash::{DefaultHasher, Hash, Hasher};
 //!
 //! struct Person {
 //!     id: u32,
@@ -194,8 +192,7 @@ pub trait Hash {
     /// # Examples
     ///
     /// ```
-    /// use std::collections::hash_map::DefaultHasher;
-    /// use std::hash::{Hash, Hasher};
+    /// use std::hash::{DefaultHasher, Hash, Hasher};
     ///
     /// let mut hasher = DefaultHasher::new();
     /// 7920.hash(&mut hasher);
@@ -224,8 +221,7 @@ pub trait Hash {
     /// # Examples
     ///
     /// ```
-    /// use std::collections::hash_map::DefaultHasher;
-    /// use std::hash::{Hash, Hasher};
+    /// use std::hash::{DefaultHasher, Hash, Hasher};
     ///
     /// let mut hasher = DefaultHasher::new();
     /// let numbers = [6, 28, 496, 8128];
@@ -300,8 +296,7 @@ pub use macros::Hash;
 /// # Examples
 ///
 /// ```
-/// use std::collections::hash_map::DefaultHasher;
-/// use std::hash::Hasher;
+/// use std::hash::{DefaultHasher, Hasher};
 ///
 /// let mut hasher = DefaultHasher::new();
 ///
@@ -329,8 +324,7 @@ pub trait Hasher {
     /// # Examples
     ///
     /// ```
-    /// use std::collections::hash_map::DefaultHasher;
-    /// use std::hash::Hasher;
+    /// use std::hash::{DefaultHasher, Hasher};
     ///
     /// let mut hasher = DefaultHasher::new();
     /// hasher.write(b"Cool!");
@@ -347,8 +341,7 @@ pub trait Hasher {
     /// # Examples
     ///
     /// ```
-    /// use std::collections::hash_map::DefaultHasher;
-    /// use std::hash::Hasher;
+    /// use std::hash::{DefaultHasher, Hasher};
     ///
     /// let mut hasher = DefaultHasher::new();
     /// let data = [0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef];
@@ -627,8 +620,7 @@ impl<H: Hasher + ?Sized> Hasher for &mut H {
 /// # Examples
 ///
 /// ```
-/// use std::collections::hash_map::RandomState;
-/// use std::hash::{BuildHasher, Hasher};
+/// use std::hash::{BuildHasher, Hasher, RandomState};
 ///
 /// let s = RandomState::new();
 /// let mut hasher_1 = s.build_hasher();
@@ -656,8 +648,7 @@ pub trait BuildHasher {
     /// # Examples
     ///
     /// ```
-    /// use std::collections::hash_map::RandomState;
-    /// use std::hash::BuildHasher;
+    /// use std::hash::{BuildHasher, RandomState};
     ///
     /// let s = RandomState::new();
     /// let new_s = s.build_hasher();
@@ -690,7 +681,7 @@ pub trait BuildHasher {
     /// }
     ///
     /// // Then later, in a `#[test]` for the type...
-    /// let bh = std::collections::hash_map::RandomState::new();
+    /// let bh = std::hash::RandomState::new();
     /// assert_eq!(
     ///     bh.hash_one(OrderAmbivalentPair(1, 2)),
     ///     bh.hash_one(OrderAmbivalentPair(2, 1))

Diff for: library/core/src/hash/sip.rs

@@ -14,7 +14,7 @@ use crate::ptr;
 ///
 /// See: <https://131002.net/siphash>
 #[unstable(feature = "hashmap_internals", issue = "none")]
-#[deprecated(since = "1.13.0", note = "use `std::collections::hash_map::DefaultHasher` instead")]
+#[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
 #[derive(Debug, Clone, Default)]
 #[doc(hidden)]
 pub struct SipHasher13 {
@@ -25,7 +25,7 @@ pub struct SipHasher13 {
 ///
 /// See: <https://131002.net/siphash/>
 #[unstable(feature = "hashmap_internals", issue = "none")]
-#[deprecated(since = "1.13.0", note = "use `std::collections::hash_map::DefaultHasher` instead")]
+#[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
 #[derive(Debug, Clone, Default)]
 struct SipHasher24 {
     hasher: Hasher<Sip24Rounds>,
@@ -44,7 +44,7 @@ struct SipHasher24 {
 /// it is not intended for cryptographic purposes. As such, all
 /// cryptographic uses of this implementation are _strongly discouraged_.
 #[stable(feature = "rust1", since = "1.0.0")]
-#[deprecated(since = "1.13.0", note = "use `std::collections::hash_map::DefaultHasher` instead")]
+#[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
 #[derive(Debug, Clone, Default)]
 pub struct SipHasher(SipHasher24);
 
@@ -147,10 +147,7 @@ impl SipHasher {
     /// Creates a new `SipHasher` with the two initial keys set to 0.
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[deprecated(
-        since = "1.13.0",
-        note = "use `std::collections::hash_map::DefaultHasher` instead"
-    )]
+    #[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
     #[rustc_const_unstable(feature = "const_hash", issue = "104061")]
     #[must_use]
     pub const fn new() -> SipHasher {
@@ -160,10 +157,7 @@ impl SipHasher {
     /// Creates a `SipHasher` that is keyed off the provided keys.
     #[inline]
     #[stable(feature = "rust1", since = "1.0.0")]
-    #[deprecated(
-        since = "1.13.0",
-        note = "use `std::collections::hash_map::DefaultHasher` instead"
-    )]
+    #[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
     #[rustc_const_unstable(feature = "const_hash", issue = "104061")]
     #[must_use]
     pub const fn new_with_keys(key0: u64, key1: u64) -> SipHasher {
@@ -175,10 +169,7 @@ impl SipHasher13 {
     /// Creates a new `SipHasher13` with the two initial keys set to 0.
     #[inline]
     #[unstable(feature = "hashmap_internals", issue = "none")]
-    #[deprecated(
-        since = "1.13.0",
-        note = "use `std::collections::hash_map::DefaultHasher` instead"
-    )]
+    #[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
     #[rustc_const_unstable(feature = "const_hash", issue = "104061")]
     pub const fn new() -> SipHasher13 {
         SipHasher13::new_with_keys(0, 0)
@@ -187,10 +178,7 @@ impl SipHasher13 {
     /// Creates a `SipHasher13` that is keyed off the provided keys.
     #[inline]
     #[unstable(feature = "hashmap_internals", issue = "none")]
-    #[deprecated(
-        since = "1.13.0",
-        note = "use `std::collections::hash_map::DefaultHasher` instead"
-    )]
+    #[deprecated(since = "1.13.0", note = "use `std::hash::DefaultHasher` instead")]
     #[rustc_const_unstable(feature = "const_hash", issue = "104061")]
     pub const fn new_with_keys(key0: u64, key1: u64) -> SipHasher13 {
         SipHasher13 { hasher: Hasher::new_with_keys(key0, key1) }

Diff for: library/core/src/ptr/mod.rs

@@ -1911,8 +1911,7 @@ pub fn addr_eq<T: ?Sized, U: ?Sized>(p: *const T, q: *const U) -> bool {
 /// # Examples
 ///
 /// ```
-/// use std::collections::hash_map::DefaultHasher;
-/// use std::hash::{Hash, Hasher};
+/// use std::hash::{DefaultHasher, Hash, Hasher};
 /// use std::ptr;
 ///
 /// let five = 5;

Diff for: library/core/tests/hash/mod.rs

@@ -167,7 +167,7 @@ fn test_indirect_hasher() {
 
 #[test]
 fn test_build_hasher_object_safe() {
-    use std::collections::hash_map::{DefaultHasher, RandomState};
+    use std::hash::{DefaultHasher, RandomState};
 
     let _: &dyn BuildHasher<Hasher = DefaultHasher> = &RandomState::new();
 }

Diff for: library/core/tests/lib.rs

@@ -172,7 +172,7 @@ mod waker;
 #[allow(dead_code)] // Not used in all configurations.
 pub(crate) fn test_rng() -> rand_xorshift::XorShiftRng {
     use core::hash::{BuildHasher, Hash, Hasher};
-    let mut hasher = std::collections::hash_map::RandomState::new().build_hasher();
+    let mut hasher = std::hash::RandomState::new().build_hasher();
     core::panic::Location::caller().hash(&mut hasher);
     let hc64 = hasher.finish();
     let seed_vec = hc64.to_le_bytes().into_iter().chain(0u8..8).collect::<Vec<u8>>();

Diff for: library/std/src/collections/hash/map.rs

@@ -271,7 +271,7 @@ impl<K, V, S> HashMap<K, V, S> {
     ///
     /// ```
     /// use std::collections::HashMap;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let s = RandomState::new();
     /// let mut map = HashMap::with_hasher(s);
@@ -303,7 +303,7 @@ impl<K, V, S> HashMap<K, V, S> {
     ///
     /// ```
     /// use std::collections::HashMap;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let s = RandomState::new();
     /// let mut map = HashMap::with_capacity_and_hasher(10, s);
@@ -714,7 +714,7 @@ impl<K, V, S> HashMap<K, V, S> {
     ///
     /// ```
     /// use std::collections::HashMap;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let hasher = RandomState::new();
     /// let map: HashMap<i32, i32> = HashMap::with_hasher(hasher);

Diff for: library/std/src/collections/hash/set.rs

@@ -361,7 +361,7 @@ impl<T, S> HashSet<T, S> {
     ///
     /// ```
     /// use std::collections::HashSet;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let s = RandomState::new();
     /// let mut set = HashSet::with_hasher(s);
@@ -393,7 +393,7 @@ impl<T, S> HashSet<T, S> {
     ///
     /// ```
     /// use std::collections::HashSet;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let s = RandomState::new();
     /// let mut set = HashSet::with_capacity_and_hasher(10, s);
@@ -411,7 +411,7 @@ impl<T, S> HashSet<T, S> {
     ///
     /// ```
     /// use std::collections::HashSet;
-    /// use std::collections::hash_map::RandomState;
+    /// use std::hash::RandomState;
     ///
     /// let hasher = RandomState::new();
     /// let set: HashSet<i32> = HashSet::with_hasher(hasher);

Diff for: library/test/src/lib.rs

@@ -265,7 +265,7 @@ where
     F: FnMut(TestEvent) -> io::Result<()>,
 {
     use std::collections::HashMap;
-    use std::hash::{DefaultHasher, BuildHasherDefault};
+    use std::hash::{BuildHasherDefault, DefaultHasher};
     use std::sync::mpsc::RecvTimeoutError;
 
     struct RunningTest {
@@ -286,8 +286,7 @@ where
     }
 
     // Use a deterministic hasher
-    type TestMap =
-        HashMap<TestId, RunningTest, BuildHasherDefault<DefaultHasher>>;
+    type TestMap = HashMap<TestId, RunningTest, BuildHasherDefault<DefaultHasher>>;
 
     struct TimeoutEntry {
         id: TestId,

Diff for: src/tools/compiletest/src/runtest.rs

@@ -19,12 +19,11 @@ use regex::{Captures, Regex};
 use rustfix::{apply_suggestions, get_suggestions_from_json, Filter};
 
 use std::borrow::Cow;
-use std::collections::hash_map::DefaultHasher;
 use std::collections::{HashMap, HashSet};
 use std::env;
 use std::ffi::{OsStr, OsString};
 use std::fs::{self, create_dir_all, File, OpenOptions};
-use std::hash::{Hash, Hasher};
+use std::hash::{DefaultHasher, Hash, Hasher};
 use std::io::prelude::*;
 use std::io::{self, BufReader};
 use std::iter;

Diff for: tests/ui/suggestions/import-trait-for-method-call.rs

@@ -1,7 +1,7 @@
 use std::hash::BuildHasher;
 
 fn next_u64() -> u64 {
-    let bh = std::collections::hash_map::RandomState::new();
+    let bh = std::hash::RandomState::new();
     let h = bh.build_hasher();
     h.finish() //~ ERROR no method named `finish` found for struct `DefaultHasher`
 }