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core: Update the safety docs for core::ptr::write

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Updated to reflect that not dropping a value is safe (but discouraged).
This commit is contained in:
Ulrik Sverdrup 2015-10-11 13:40:47 +02:00
parent 9d3e79ad37
commit 4dee42fe58
1 changed files with 5 additions and 3 deletions
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8
src/libcore/ptr.rs
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@ -145,9 +145,11 @@ pub unsafe fn read_and_drop<T>(dest: *mut T) -> T {
///
/// # Safety
///
/// Beyond accepting a raw pointer, this operation is unsafe because it does
/// not drop the contents of `dst`. This could leak allocations or resources,
/// so care must be taken not to overwrite an object that should be dropped.
/// This operation is marked unsafe because it accepts a raw pointer.
///
/// It does not drop the contents of `dst`. This is safe, but it could leak
/// allocations or resources, so care must be taken not to overwrite an object
/// that should be dropped.
///
/// This is appropriate for initializing uninitialized memory, or overwriting
/// memory that has previously been `read` from.