serde_with.rs

// examples of `deserialize_with` and `serialize_with` in serde

#[derive(Serialize, Deserialize, Eq, PartialEq)]
#[serde(untagged)]
pub enum Version {
    #[serde(serialize_with = "serialize_public")]
    #[serde(deserialize_with = "deserialize_public")]
    Public(String)
}

fn serialize_public<S: serde::Serializer>(v: &String, s: S) -> Result<S::Ok, S::Error> {
    s.serialize_str(&v[..])
}

fn deserialize_public<'de, D: serde::Deserializer<'de>>(d: D) -> Result<String, D::Error> {
    String::deserialize(d)
}