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use bytes::BytesMut;
use std::rc::Rc;
pub trait Decoder {
type Item;
type Error: std::fmt::Debug;
fn decode(&self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error>;
fn decode_eof(&self, buf: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
match self.decode(buf)? {
Some(frame) => Ok(Some(frame)),
None => Ok(None),
}
}
}
impl<T> Decoder for Rc<T>
where
T: Decoder,
{
type Item = T::Item;
type Error = T::Error;
fn decode(&self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
(**self).decode(src)
}
fn decode_eof(&self, src: &mut BytesMut) -> Result<Option<Self::Item>, Self::Error> {
(**self).decode_eof(src)
}
}