docs: std::slice::from_raw_parts() does not mention that p must be non-null even for zero length slices

[codyps]

Link to the docs in question: https://doc.rust-lang.org/nightly/std/slice/fn.from_raw_parts.html

[Gankra]

Is there any API that accepts a null raw pointer?

[bluss]

What about ptr::copy if the count is zero?

[nagisa]

@gankro transmute does :)

println!("{:?}", unsafe { 
    ::std::mem::transmute::<*const u8, Option<&u8>>(::std::ptr::null()) 
});

[Gankra]

@nagisa I suppose I implicitly meant "explicitly accepts a pointer, and not some opaque T"