Function std::ptr::write 1.0.0
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[src]
pub unsafe fn write<T>(dst: *mut T, src: T)
Overwrites a memory location with the given value without reading or dropping the old value.
Safety
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.
Additionally, it does not drop src. Semantically, src is moved into the
location pointed to by dst.
This is appropriate for initializing uninitialized memory, or overwriting
memory that has previously been read from.
The pointer must be aligned; use write_unaligned if that is not the case.
Examples
Basic usage:
let mut x = 0; let y = &mut x as *mut i32; let z = 12; unsafe { std::ptr::write(y, z); assert_eq!(std::ptr::read(y), 12); }Run