# i19.md

i19 for Rust

Compile-time internationalization with runtime language switch and plural/genders support

License

MIT-0

main.rs

pub enum Plural {
    One,
    Two,
    Few,
    Many,
    Other,
}

pub enum Gender {
    Male,
    Female,
    Other,
}

pub mod en {
    use super::*;

    pub struct Plural(pub i32);

    /// https://www.gnu.org/software/gettext/manual/html_node/Plural-forms.html
    impl Into<super::Plural> for Plural {
        fn into(self) -> super::Plural {
            match self.0 {
                1 => super::Plural::One,
                _ => super::Plural::Other,
            }
        }
    }
}

pub mod ru {
    pub struct Plural(pub i32);

    /// https://www.gnu.org/software/gettext/manual/html_node/Plural-forms.html
    /// Plural-Forms: nplurals=3; \
    ///     plural=n%10==1 && n%100!=11 ? 0 : \
    ///            n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
    impl Into<super::Plural> for Plural {
        fn into(self) -> super::Plural {
            match self.0 {
                1 => super::Plural::One,
                _ => super::Plural::Other,
            }
        }
    }
}


/// Project Fluent, FTL syntax:
/// ```FTL
/// # Simple things are simple.
/// hello-user = Hello, {$userName}!
///
/// # Complex things are possible.
/// shared-photos =
///     {$userName} {$photoCount ->
///         [one] added a new photo
///        *[other] added {$photoCount} new photos
///     } to {$userGender ->
///         [male] his stream
///         [female] her stream
///        *[other] their stream
///     }.
/// ```
///
/// Project Rust, Rust syntax:
pub fn main() {
    let userName = "John";
    let photoCount = 1;
    let userGender = Gender::Male;

    let lang = "en";

    let shared_photos = match lang {
        "en" => format!(
            "{userName} {} to {}",
            match en::Plural(photoCount).into() {
                Plural::One => format!("added a new photo"),
                _ => format!("added {} new photos", photoCount),
            },
            match userGender {
                Gender::Male => "his stream",
                Gender::Female => "her stream",
                _ => "their stream",
            }),
        "ru" => format!(
            "{userName} {} в {}",
            match ru::Plural(photoCount).into() {
                Plural::One => format!("добавил новое фото"),
                _ => format!("добавил {} новых фото", photoCount),
            },
            match userGender {
                Gender::Male => "евонный поток",
                Gender::Female => "еёшный поток",
                _ => "ихний поток",
            }),
        _ => todo!(),
    };

    println!("{}", shared_photos);
}