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use bytes::BytesMut; use std::rc::Rc; /// Trait of helper objects to write out messages as bytes. pub trait Encoder { /// The type of items consumed by the `Encoder` type Item; /// The type of encoding errors. type Error: std::fmt::Debug; /// Encodes a frame into the buffer provided. fn encode(&self, item: Self::Item, dst: &mut BytesMut) -> Result<(), Self::Error>; } impl<T> Encoder for Rc<T> where T: Encoder, { type Item = T::Item; type Error = T::Error; fn encode(&self, item: Self::Item, dst: &mut BytesMut) -> Result<(), Self::Error> { (**self).encode(item, dst) } }