mirror of
https://github.com/rust-lang/rust
synced 2024-09-06 01:11:17 +00:00
5e5f3341e3
Make `core::mem::zeroed` const stable. Newly stable API:
// core::mem
pub const unsafe fn zeroed<T>() -> T;
This is stabilized with `const_maybe_uninit_zeroed` since it is a simple
wrapper.
In order to make this possible, intrinsics `assert_zero_valid` was made
const stable under `const_assert_type2`.
`assert_mem_uninitialized_valid` was also made const stable since it is
under the same gate.
23 lines
588 B
Rust
23 lines
588 B
Rust
#![feature(never_type)]
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#![feature(core_intrinsics)]
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use std::intrinsics;
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#[allow(invalid_value)]
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fn main() {
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use std::mem::MaybeUninit;
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const _BAD1: () = unsafe {
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MaybeUninit::<!>::uninit().assume_init();
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//~^ERROR: evaluation of constant value failed
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};
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const _BAD2: () = {
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intrinsics::assert_mem_uninitialized_valid::<&'static i32>();
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//~^ERROR: evaluation of constant value failed
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};
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const _BAD3: () = {
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intrinsics::assert_zero_valid::<&'static i32>();
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//~^ERROR: evaluation of constant value failed
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};
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}
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