Trait VersionedCodec 

pub trait VersionedCodec: Sized {
    // Required methods
    fn decode_version(version: u8, body: &[u8]) -> Result<Self, CodecError>;
    fn encode_version(&self, version: u8) -> Result<Vec<u8>, CodecError>;
}

A type whose persisted and on-wire representation is versioned.

decode_version up-converts an older layout into the current in-memory type; encode_version down-converts the current type into the layout of a given (possibly older) version. Implementors typically match on the version, routing to a per-version struct via decode_postcard_exact / encode_postcard and a From conversion. Both methods operate on the bare body (the bytes after the version prefix); framing is handled by encode_framed / decode_framed.

Required Methods

fn decode_version(version: u8, body: &[u8]) -> Result<Self, CodecError>

Decode a body known to be version into the current type.

fn encode_version(&self, version: u8) -> Result<Vec<u8>, CodecError>

Encode self as the body layout of version.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors