bjoernager/rust
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Add core::clone::CloneToUninit.

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This trait allows cloning DSTs, but is unsafe to implement and use
because it writes to possibly-uninitialized memory which must be of the
correct size, and must initialize that memory.

It is only implemented for `T: Clone` and `[T] where T: Clone`, but
additional implementations could be provided for specific `dyn Trait`
or custom-DST types.
This commit is contained in:
Kevin Reid 2023-09-24 08:55:19 -07:00
parent 433355166d
commit ec201b8650
3 changed files with 254 additions and 0 deletions
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2
library/core/tests/lib.rs
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@ -8,6 +8,7 @@
#![feature(async_iterator)]
#![feature(bigint_helper_methods)]
#![feature(cell_update)]
#![feature(clone_to_uninit)]
#![feature(const_align_offset)]
#![feature(const_align_of_val_raw)]
#![feature(const_black_box)]
@ -54,6 +55,7 @@
#![feature(slice_split_once)]
#![feature(split_as_slice)]
#![feature(maybe_uninit_fill)]
#![feature(maybe_uninit_slice)]
#![feature(maybe_uninit_uninit_array)]
#![feature(maybe_uninit_write_slice)]
#![feature(maybe_uninit_uninit_array_transpose)]