use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
#[serde(tag = "@tag")]
pub enum TaggedEnum {
    VariantTag(WrappedVariant),
}

#[derive(Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct WrappedVariant {
    pub variant: Variant,
}

#[derive(Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct Variant {
    #[serde(rename = "@float")]
    pub float: f64,
}


fn main() {
    let document = r#"
    <?xml version="1.0" encoding="ISO-8859-1"?>
    <variant float="0.0">
    </variant>
    "#;
    let _: Variant = quick_xml::de::from_str(document).unwrap();

    let document = r#"
    <?xml version="1.0" encoding="ISO-8859-1"?>
    <tagged_enum tag="VariantTag">
        <variant float="0.0">
        </variant>
    </tagged_enum>
    "#;
    let _: TaggedEnum = quick_xml::de::from_str(document).unwrap();
}