s_mach.i18n.I18N.scala Maven / Gradle / Ivy

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package s_mach.i18n

/**
 * A type-class for formatting an instance of a type to an internationalized string
 * based on the I18N config in scope.
 */
trait I18N[A] {
  def apply(a: A)(implicit cfg: I18NConfig) : I18NString
}

object I18N {
  def apply[A](f: I18NConfig => A => I18NString) : I18N[A] =
    new I18N[A] {
      def apply(a: A)(implicit cfg:I18NConfig) = I18NString(f(cfg)(a))
    }

  object Implicits extends Implicits
  trait Implicits {
    implicit val i18n_Boolean =
      I18N[Boolean] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Byte =
      I18N[Byte] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Short =
      I18N[Short] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Int =
      I18N[Int] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Long =
      I18N[Long] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Float =
      I18N[Float] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_Double =
      I18N[Double] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_BigInt =
      I18N[BigInt] { implicit cfg => cfg.stdI18N.i18n }

    implicit val i18n_BigDecimal =
      I18N[BigDecimal] { implicit cfg => cfg.stdI18N.i18n }

    // Note: I18N[String] and I18N[Char] are intentionally not declared
    // to prevent accidentally converting a String/Char to I18NString without
    // custom internationalization. To convert to I18NString use explicit
    // converters, String.asI18N or Char.toI18N

    implicit val i18n_I18NString =
      I18N[I18NString] { cfg => a => a }

  }
}