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use crate::{Chinese, ToChinese, Variant};

/// Any pair of types implementing [ToChinese] can be infallibly converted to Chinese.
///
/// In particular:
///
/// * the former element is used for [Variant::Simplified].
///
/// * the latter element is used for [Variant::Traditional].
///
/// The result is [omissible](Chinese::omissible) according to the selected element.
/// ```
/// use chinese_format::*;
///
/// let str_tuple = ("天气", "天氣");
/// assert_eq!(str_tuple.to_chinese(Variant::Simplified), "天气");
/// assert_eq!(str_tuple.to_chinese(Variant::Traditional), "天氣");
///
/// let integer_tuple = (92, 0);
/// assert_eq!(integer_tuple.to_chinese(Variant::Simplified), "九十二");
/// assert_eq!(integer_tuple.to_chinese(Variant::Traditional), Chinese {
///     logograms: "零".to_string(),
///     omissible: true
/// });
/// ```
impl<T1: ToChinese, T2: ToChinese> ToChinese for (T1, T2) {
    fn to_chinese(&self, variant: Variant) -> Chinese {
        match variant {
            Variant::Simplified => self.0.to_chinese(variant),
            Variant::Traditional => self.1.to_chinese(variant),
        }
    }
}