Macro stringsext::as_mut_str_unchecked_no_borrow_check

macro_rules! as_mut_str_unchecked_no_borrow_check {
    ($slice_u8 : expr) => { ... };
}

This macro is useful for zero cost conversion from &u8 to &str. Use this with care. Make sure, that the byte slice boundaries always fit character boundaries and that the slice only contains valid UTF-8. Also, check for potential race conditions yourself, because this disables borrow checking for $slice_u8. This is the mutable version.