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feat: Use DecodeOwned for improved ergonomic (#74)

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Santiago Carmuega 2022-03-14 18:27:00 -03:00 • committed by GitHub
parent 7b4c67ccef
commit 3336d4d446
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7 changed files with 20 additions and 53 deletions
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29
pallas-codec/src/lib.rs
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@ -11,20 +11,19 @@ pub trait Fragment: Sized {
fn write_cbor<W: Write>(&self, write: W) -> Result<(), minicbor::encode::Error<W::Error>>;
}
#[macro_export]
macro_rules! impl_fragment {
($Struct:ty) => {
impl $crate::Fragment for $Struct {
fn read_cbor(buffer: &[u8]) -> Result<Self, decode::Error> {
$crate::minicbor::decode(buffer)
}
pub trait DecodeOwned: for<'b> minicbor::Decode<'b> {}
fn write_cbor<W: encode::Write>(
&self,
write: W,
) -> Result<(), encode::Error<W::Error>> {
$crate::minicbor::encode(self, write)
}
}
};
impl<T> DecodeOwned for T where T: for<'b> minicbor::Decode<'b> {}
impl<T> Fragment for T
where
T: DecodeOwned + minicbor::Encode,
{
fn read_cbor(buffer: &[u8]) -> Result<Self, minicbor::decode::Error> {
minicbor::decode(buffer)
}
fn write_cbor<W: Write>(&self, write: W) -> Result<(), minicbor::encode::Error<W::Error>> {
minicbor::encode(self, write)
}
}