Commits on Feb 9, 2023

1. Implement BufMut for &mut [MaybeUninit<u8>] …

   This will allow using BufMut without having to initialise memory
   first.  In particular, this will allow simple integration with tokio:
   
       #![feature(maybe_uninit_slice)]
   
       use tokio::io::AsyncReadExt;
   
       let mut tokio_file = /* ... */;
       let mut buf = [MaybeUninit::uninit(); 4096];
       let len = tokio_file.read_buf(&mut &mut buf[..]);
       // SAFETY: read initialised first len bytes of the buffer.
       let buf = unsafe {
           MaybeUninit::slice_assume_init_mut(&buf[..len])
       };

   

   mina86 committed Feb 9, 2023
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