pub const unsafe fn write_bytes<T>(dst: *mut T, val: u8, count: usize)Expand description
Sets count * size_of::<T>() bytes of memory starting at dst to
val.
write_bytes is similar to C’s memset, but sets count * size_of::<T>() bytes to val.
§Safety
Behavior is undefined if any of the following conditions are violated:
- 
dstmust be valid for writes ofcount * size_of::<T>()bytes.
- 
dstmust be properly aligned.
Note that even if the effectively copied size (count * size_of::<T>()) is
0, the pointer must be non-null and properly aligned.
Additionally, note that changing *dst in this way can easily lead to undefined behavior (UB)
later if the written bytes are not a valid representation of some T. For instance, the
following is an incorrect use of this function:
unsafe {
    let mut value: u8 = 0;
    let ptr: *mut bool = &mut value as *mut u8 as *mut bool;
    let _bool = ptr.read(); // This is fine, `ptr` points to a valid `bool`.
    ptr.write_bytes(42u8, 1); // This function itself does not cause UB...
    let _bool = ptr.read(); // ...but it makes this operation UB! ⚠️
}§Examples
Basic usage: