rust-i18n 4.0.0

Rust I18n is use Rust codegen for load YAML file storage translations on compile time, and give you a t! macro for simply get translation texts.
Documentation 
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// Init translations for current crate.
rust_i18n::i18n!("examples/app/locales");

fn main() {}

#[cfg(test)]
mod tests {
    use rust_i18n::t;

    #[test]
    fn test_example_app() {
        rust_i18n::set_locale("en");
        assert_eq!(t!("hello", name = "Longbridge"), "Hello, Longbridge!");
        assert_eq!(t!("view.buttons.ok"), "Ok");
        assert_eq!(t!("view.buttons.cancel"), "Cancel");
        assert_eq!(
            t!("view.datetime.about_x_hours", count = "10"),
            "about 10 hours"
        );

        assert_eq!(
            t!("hello", locale = "fr", name = "Longbridge"),
            "Bonjour, Longbridge!"
        );
        rust_i18n::set_locale("fr");
        assert_eq!(t!("hello", name = "Longbridge"), "Bonjour, Longbridge!");
        assert_eq!(
            t!("view.datetime.about_x_hours", count = "10"),
            "environ 10 heures"
        );
    }
}