Function extern_spec_T_Option_T_as_mut_slice 

pub fn extern_spec_T_Option_T_as_mut_slice<T>(self_: &mut Option<T>) -> &mut [T]

extern spec for Option<T>::as_mut_slice

This is not a real function: its only use is for documentation.

terminates

ghost

ensures

match *self {
    None => result@.len() == 0,
    Some(_) => exists<b:&mut T>
        *self == Some(*b) && ^self == Some(^b) &&
        (*result)@[0] == *b && (^result)@[0] == ^b &&
        (*result)@.len() == 1 && (^result)@.len() == 1,
}