Macro aead::stream::impl_stream_object

macro_rules! impl_stream_object {
    ($name : ident, $next_method : tt, $next_in_place_method : tt, $last_method :
 tt, $last_in_place_method : tt, $op : tt, $in_place_op : tt, $op_desc : expr,
 $obj_desc : expr) => { ... };
}

This is supported on crate feature stream only.

Implement a stateful STREAM object (i.e. encryptor or decryptor)