Function deserialize

crates/environ/src/component/types.rs:967–977

(deser: D)

    }

    pub fn deserialize<'de, D>(deser: D) -> Result<DiscriminantSize, D::Error>
    where
        D: Deserializer<'de>,
    {
        match u32::deserialize(deser)? {
            1 => Ok(DiscriminantSize::Size1),
            2 => Ok(DiscriminantSize::Size2),
            4 => Ok(DiscriminantSize::Size4),
            _ => Err(D::Error::custom("invalid discriminant size")),
        }
    }
}

/// Shape of a "record" type in interface types.