#![feature(associated_type_defaults)]

pub trait Decoder<'b> {
    type Storage: Default = ();
    type Output;


    fn storage(buffer: &[u8]) -> Self::Storage {
       <Self as Decoder>::Storage::default()
    }


    fn decode(buffer: &'b [u8]) -> Self::Output;
    fn size(storage: &Self::Storage) -> usize;
}