Derive Macro Decode 

#[derive(Decode)]
{
    // Attributes available to this derive:
    #[codec]
    #[index]
}

Derive the Decode trait for a message.

A #[codec(..)] attribute must be present to select the deserialization backend. The same attribute is shared with Encode — encoding and decoding of the same type must use the same backend, so there is no need to distinguish them:

• #[codec(prost)] — delegates to prost::Message::decode. The target type must also implement prost::Message.
• #[codec(zerocopy)] — delegates to zerocopy::FromBytes::read_from_bytes. The target type must also implement zerocopy::FromBytes.
• #[codec(rkyv)] — delegates to rkyv::from_bytes. The target type must also implement rkyv::Archive + rkyv::Deserialize.

A #[index(N)] attribute must also be present and sets the Decode::ID constant to the given u64 literal. The value in Encode and Decode must match for the same message type.

Example

use acktor_derive::Decode;

#[derive(zerocopy::FromBytes, Decode)]
#[codec(zerocopy)]
#[index(1)]
struct Ping(u64);