language_tags::langtag!

macro_rules! langtag {
    ( $language:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: None,
            script: None,
            region: None,
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;;;$region:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: None,
            script: None,
            region: Some(stringify!($region).to_owned()),
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;;$script:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: None,
            script: Some(stringify!($script).to_owned()),
            region: None,
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;;$script:expr;$region:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: None,
            script: Some(stringify!($script).to_owned()),
            region: Some(stringify!($region).to_owned()),
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;$extlang:expr) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: Some(stringify!($extlang).to_owned()),
            script: None,
            region: None,
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;$extlang:expr;$script:expr) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: Some(stringify!($extlang).to_owned()),
            script: Some(stringify!($script).to_owned()),
            region: None,
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;$extlang:expr;;$region:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: Some(stringify!($extlang).to_owned()),
            script: None,
            region: Some(stringify!($region).to_owned()),
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
    ( $language:expr;$extlang:expr;$script:expr;$region:expr ) => {
        $crate::LanguageTag {
            language: Some(stringify!($language).to_owned()),
            extlang: Some(stringify!($extlang).to_owned()),
            script: Some(stringify!($script).to_owned()),
            region: Some(stringify!($region).to_owned()),
            variants: Vec::new(),
            extensions: ::std::collections::BTreeMap::new(),
            privateuse: Vec::new(),
        }
    };
}

Utility for creating simple language tags.

The macro supports the language, exlang, script and region parts of language tags, they are separated by semicolons, omitted parts are denoted with mulitple semicolons.

Examples

• it: langtag!(it)
• it-LY: langtag!(it;;;LY)
• it-Arab-LY: langtag!(it;;Arab;LY)
• ar-afb: langtag!(ar;afb)
• i-enochian: langtag!(i-enochian)