Use allocator-api2 only on stable

Keep feature semantics

Author: zakarumych

Cargo.toml

@@ -31,7 +31,7 @@ path = "tests/try_alloc.rs"
 harness = false
 
 [dependencies]
-allocator-api2 = { version = "0.2.7-rc.1", default-features = false, optional = true, features = ["alloc"] }
+allocator-api2 = { version = "0.2.8", default-features = false, optional = true, features = ["alloc"] }
 
 [dev-dependencies]
 quickcheck = "1.0.3"
@@ -42,8 +42,7 @@ rand = "0.8.5"
 default = []
 collections = []
 boxed = []
-allocator_api = ["allocator-api2"]
-nightly = ["allocator_api"]
+allocator_api = []
 
 # [profile.bench]
 # debug = true

src/lib.rs

@@ -2,7 +2,7 @@
 #![deny(missing_debug_implementations)]
 #![deny(missing_docs)]
 #![no_std]
-#![cfg_attr(feature = "nightly", feature(allocator_api))]
+#![cfg_attr(feature = "allocator_api", feature(allocator_api))]
 
 #[doc(hidden)]
 pub extern crate alloc as core_alloc;
@@ -24,10 +24,10 @@ use core::slice;
 use core::str;
 use core_alloc::alloc::{alloc, dealloc, Layout};
 
-#[cfg(feature = "nightly")]
+#[cfg(feature = "allocator_api")]
 use core_alloc::alloc::{AllocError, Allocator};
 
-#[cfg(all(feature = "allocator_api", not(feature = "nightly")))]
+#[cfg(all(feature = "allocator-api2", not(feature = "allocator_api")))]
 use allocator_api2::alloc::{AllocError, Allocator};
 
 pub use alloc::AllocErr;
@@ -1887,7 +1887,7 @@ unsafe impl<'a> alloc::Alloc for &'a Bump {
     }
 }
 
-#[cfg(feature = "allocator_api")]
+#[cfg(any(feature = "allocator_api", feature = "allocator-api2"))]
 unsafe impl<'a> Allocator for &'a Bump {
     fn allocate(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError> {
         self.try_alloc_layout(layout)