Method serialize

src/serde/ser.rs:598–604

(&self, serializer: S)

        }
        impl Serialize for Enum {
            fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
                let variant_index = match self {
                    Self::A => 255,
                    Self::B => 256,
                };
                serializer.serialize_unit_variant("", variant_index, "")
            }
        }
        assert!(crate::serialize(&Enum::A).is_ok());
        assert!(crate::serialize(&Enum::B).is_err());