fn deserialize()

in src/format.rs [438:470]
29 lines of code
3 McCabe index (conditional complexity)

    fn deserialize<D>(deserializer: D) -> Result<Delta, D::Error>
    where
        D: Deserializer<'de>,
    {
        struct DeltaVisitor;

        impl Visitor<'_> for DeltaVisitor {
            type Value = Delta;

            fn expecting(&self, f: &mut fmt::Formatter) -> fmt::Result {
                f.write_str("version -> version delta")
            }

            fn visit_str<E>(self, string: &str) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                if let Some((from, to)) = string.split_once("->") {
                    Ok(Delta {
                        from: Some(VetVersion::parse(from.trim()).map_err(de::Error::custom)?),
                        to: VetVersion::parse(to.trim()).map_err(de::Error::custom)?,
                    })
                } else {
                    Ok(Delta {
                        from: None,
                        to: VetVersion::parse(string.trim()).map_err(de::Error::custom)?,
                    })
                }
            }
        }

        deserializer.deserialize_str(DeltaVisitor)
    }