Rollup merge of #46287 - SimonSapin:stable-constness, r=aturon

Stabilize const-calling existing const-fns in std

Fixes #46038

src/test/compile-fail-fulldeps/dropck_tarena_cycle_checked.rs

@@ -17,7 +17,6 @@
 //  for the error message we see here.)
 
 #![feature(rustc_private)]
-#![feature(const_atomic_usize_new)]
 
 extern crate arena;
 

src/test/compile-fail/const-fn-feature-flags.rs

@@ -1,24 +0,0 @@
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// Test use of const fns in std using individual feature gates.
-
-use std::cell::Cell;
-
-const CELL: Cell<i32> = Cell::new(42); //~ERROR not yet stable as a const fn
-    //~^HELP #![feature(const_cell_new)]
-
-fn main() {
-    let v = CELL.get();
-    CELL.set(v+1);
-
-    assert_eq!(CELL.get(), v);
-}
-

src/test/compile-fail/dropck_trait_cycle_checked.rs

@@ -13,8 +13,6 @@
 //
 // (Compare against compile-fail/dropck_vec_cycle_checked.rs)
 
-#![feature(const_atomic_usize_new)]
-
 use std::cell::Cell;
 use id::Id;
 

src/test/compile-fail/issue-17718-const-borrow.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(const_unsafe_cell_new)]
-
 use std::cell::UnsafeCell;
 
 const A: UnsafeCell<usize> = UnsafeCell::new(1);

src/test/compile-fail/issue-43733-2.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(const_fn, const_cell_new, const_unsafe_cell_new)]
+#![feature(const_fn)]
 #![feature(cfg_target_thread_local, thread_local_internals)]
 
 // On platforms *without* `#[thread_local]`, use

src/test/compile-fail/issue-7364.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(box_syntax, const_refcell_new)]
+#![feature(box_syntax)]
 
 use std::cell::RefCell;
 

src/test/debuginfo/constant-debug-locs.rs

@@ -15,7 +15,6 @@
 #![allow(dead_code, unused_variables)]
 #![feature(omit_gdb_pretty_printer_section)]
 #![omit_gdb_pretty_printer_section]
-#![feature(const_unsafe_cell_new)]
 #![feature(static_mutex)]
 
 // This test makes sure that the compiler doesn't crash when trying to assign

src/test/run-pass-fulldeps/vector-sort-panic-safe.rs

@@ -12,7 +12,6 @@
 
 #![feature(rustc_private)]
 #![feature(sort_unstable)]
-#![feature(const_atomic_usize_new)]
 
 extern crate rand;
 

src/test/run-pass-valgrind/cast-enum-with-dtor.rs

@@ -11,7 +11,6 @@
 // no-prefer-dynamic
 
 #![allow(dead_code)]
-#![feature(const_atomic_usize_new)]
 
 // check dtor calling order when casting enums.
 

src/test/run-pass/associated-types-project-from-type-param-via-bound-in-where.rs

@@ -12,8 +12,6 @@
 // `Item` originates in a where-clause, not the declaration of
 // `T`. Issue #20300.
 
-#![feature(const_atomic_usize_new)]
-
 use std::marker::{PhantomData};
 use std::sync::atomic::{AtomicUsize};
 use std::sync::atomic::Ordering::SeqCst;

src/test/run-pass/auxiliary/issue-17718-aux.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic;
 
 pub const C1: usize = 1;

src/test/run-pass/auxiliary/thread-local-extern-static.rs

@@ -9,7 +9,6 @@
 // except according to those terms.
 
 #![feature(cfg_target_thread_local, const_fn, thread_local)]
-#![feature(const_cell_new)]
 #![crate_type = "lib"]
 
 #[cfg(target_thread_local)]

src/test/run-pass/box-of-array-of-drop-1.rs

@@ -13,8 +13,6 @@
 
 // ignore-emscripten no threads support
 
-#![feature(const_atomic_usize_new)]
-
 use std::thread;
 use std::sync::atomic::{AtomicUsize, Ordering};
 

src/test/run-pass/box-of-array-of-drop-2.rs

@@ -13,8 +13,6 @@
 
 // ignore-emscripten no threads support
 
-#![feature(const_atomic_usize_new)]
-
 use std::thread;
 use std::sync::atomic::{AtomicUsize, Ordering};
 

src/test/run-pass/const-fn-feature-flags.rs

@@ -8,9 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// Test use of const fns in std using individual feature gates.
-
-#![feature(const_cell_new)]
+// Test use of stabilized const fns in std formerly using individual feature gates.
 
 use std::cell::Cell;
 

src/test/run-pass/const-size_of-align_of.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(const_fn, const_size_of, const_align_of)]
+#![feature(const_fn)]
 
 use std::mem;
 

src/test/run-pass/issue-17718-static-unsafe-interior.rs

@@ -10,9 +10,6 @@
 
 // pretty-expanded FIXME #23616
 
-#![feature(core)]
-#![feature(const_unsafe_cell_new)]
-
 use std::marker;
 use std::cell::UnsafeCell;
 

src/test/run-pass/issue-17718.rs

@@ -10,10 +10,6 @@
 
 // aux-build:issue-17718-aux.rs
 
-
-#![feature(core)]
-#![feature(const_atomic_usize_new)]
-
 extern crate issue_17718_aux as other;
 
 use std::sync::atomic::{AtomicUsize, Ordering};

src/test/run-pass/issue-21486.rs

@@ -12,8 +12,6 @@
 // created via FRU and control-flow breaks in the middle of
 // construction.
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic::{Ordering, AtomicUsize};
 
 #[derive(Debug)]

src/test/run-pass/issue-26655.rs

@@ -12,8 +12,6 @@
 
 // Check that the destructors of simple enums are run on unwinding
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic::{Ordering, AtomicUsize};
 use std::thread;
 

src/test/run-pass/issue-27997.rs

@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic::{Ordering, AtomicUsize};
 
 use std::mem;

src/test/run-pass/nested-vec-3.rs

@@ -14,8 +14,6 @@
 // the contents implement Drop and we hit a panic in the middle of
 // construction.
 
-#![feature(const_atomic_usize_new)]
-
 use std::thread;
 use std::sync::atomic::{AtomicUsize, Ordering};
 

src/test/run-pass/panic-handler-chain.rs

@@ -11,7 +11,6 @@
 // ignore-emscripten no threads support
 
 #![feature(panic_handler, std_panic)]
-#![feature(const_atomic_usize_new)]
 
 use std::sync::atomic::{AtomicUsize, Ordering};
 use std::panic;

src/test/run-pass/panic-handler-set-twice.rs

@@ -8,7 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![feature(panic_handler, std_panic)]
-#![feature(const_atomic_usize_new)]
 
 // ignore-emscripten no threads support
 

src/test/run-pass/struct-order-of-eval-3.rs

@@ -11,8 +11,6 @@
 // Checks that functional-record-update order-of-eval is as expected
 // even when no Drop-implementations are involved.
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic::{Ordering, AtomicUsize};
 
 struct W { wrapped: u32 }

src/test/run-pass/struct-order-of-eval-4.rs

@@ -11,8 +11,6 @@
 // Checks that struct-literal expression order-of-eval is as expected
 // even when no Drop-implementations are involved.
 
-#![feature(const_atomic_usize_new)]
-
 use std::sync::atomic::{Ordering, AtomicUsize};
 
 struct W { wrapped: u32 }

src/test/ui/span/dropck_arr_cycle_checked.rs

@@ -13,7 +13,7 @@
 //
 // (Compare against compile-fail/dropck_vec_cycle_checked.rs)
 
-#![feature(const_atomic_usize_new)]
+
 
 use std::cell::Cell;
 use id::Id;

src/test/ui/span/dropck_vec_cycle_checked.rs

@@ -12,7 +12,7 @@
 //
 // (Compare against compile-fail/dropck_arr_cycle_checked.rs)
 
-#![feature(const_atomic_usize_new)]
+
 
 use std::cell::Cell;
 use id::Id;

src/test/ui/span/vec-must-not-hide-type-from-dropck.rs

@@ -23,7 +23,7 @@
 // conditions above to be satisfied, meaning that if the dropck is
 // sound, it should reject this code.
 
-#![feature(const_atomic_usize_new)]
+
 
 use std::cell::Cell;
 use id::Id;