alloc: stabilise Allocator

compiler/rustc_data_structures/src/lib.rs

@@ -10,9 +10,10 @@
 #![allow(internal_features)]
 #![allow(rustc::default_hash_types)]
 #![allow(rustc::potential_query_instability)]
+#![cfg_attr(bootstrap, feature(allocator_api))]
+#![cfg_attr(not(bootstrap), feature(allocator_ext))]
 #![cfg_attr(test, feature(test))]
 #![deny(unsafe_op_in_unsafe_fn)]
-#![feature(allocator_api)]
 #![feature(ascii_char)]
 #![feature(ascii_char_variants)]
 #![feature(auto_traits)]

compiler/rustc_middle/src/lib.rs

@@ -27,8 +27,9 @@
 // tidy-alphabetical-start
 #![allow(internal_features)]
 #![allow(rustc::direct_use_of_rustc_type_ir)]
+#![cfg_attr(bootstrap, feature(allocator_api))]
 #![cfg_attr(doc, feature(intra_doc_pointers))]
-#![feature(allocator_api)]
+#![cfg_attr(not(bootstrap), feature(allocator_ext))]
 #![feature(associated_type_defaults)]
 #![feature(box_as_ptr)]
 #![feature(closure_track_caller)]

library/alloc/src/alloc.rs

@@ -51,12 +51,18 @@ unsafe extern "Rust" {
 ///
 /// Note: while this type is unstable, the functionality it provides can be
 /// accessed through the [free functions in `alloc`](self#functions).
-#[unstable(feature = "allocator_api", issue = "32838")]
+#[stable(feature = "allocator_api", since = "CURRENT_RUSTC_VERSION")]
 #[derive(Copy, Clone, Default, Debug)]
 // the compiler needs to know when a Box uses the global allocator vs a custom one
 #[lang = "global_alloc_ty"]
 pub struct Global;
 
+#[unstable(feature = "allocator_ext", issue = "32838", implied_by = "allocator_api")]
+unsafe impl core::alloc::AllocatorClone for Global {}
+
+#[unstable(feature = "allocator_ext", issue = "32838", implied_by = "allocator_api")]
+unsafe impl core::alloc::PinSafeAllocator for Global {}
+
 /// Allocates memory with the global allocator.
 ///
 /// This function forwards calls to the [`GlobalAlloc::alloc`] method
@@ -440,7 +446,7 @@ impl Global {
     }
 }
 
-#[unstable(feature = "allocator_api", issue = "32838")]
+#[stable(feature = "allocator_api", since = "CURRENT_RUSTC_VERSION")]
 #[rustc_const_unstable(feature = "const_heap", issue = "79597")]
 unsafe impl const Allocator for Global {
     #[inline]