use crate::prelude::*; #[derive(Serialize, Deserialize, Document)] enum Ty { #[serde(with = "fun")] Foo, } mod fun { pub fn serialize(_: S) -> Result where S: serde::Serializer, { unimplemented!() } pub fn deserialize<'de, D>(_: D) -> Result<(), D::Error> where D: serde::Deserializer<'de>, { unimplemented!() } } printer_test! { "output.json" => to_json(Ty), "output.toml" => to_toml(Ty), }