Usage examples:

Constructor that never fails:

case class Foo(value: String)

object Foo extends (String => Foo) {

  private val mapping = Mappings.map[String, Foo](Foo, _.value)

  implicit val jsonFormat = mapping.jsonReads

  implicit val pathBindable = mapping.pathBindable

  implicit val queryStringBindable = mapping.queryStringBindable

}

Constructor that may fail:

case class Bar(value: String) {
  require(value.nonEmpty)
}

object Bar {

  private val mapping = Mappings.mapTry[String, Foo](s => Try(Foo(s)), _.value)

  implicit val jsonFormat = mapping.jsonReads

  implicit val pathBindable = mapping.pathBindable

  implicit val queryStringBindable = mapping.queryStringBindable

}

Enumeration:

sealed trait Base
case object Thing1 extends Base
case object Thing2 extends Base

object Base {

  private val mapping = Mappings.mapEnum(Thing1, Thing2)

  def fromString(name: String): Option[Base] = mapping.fromString(name)

  implicit val jsonFormat = mapping.jsonReads

  implicit val pathBindable = mapping.pathBindable

  implicit val queryStringBindable = mapping.queryStringBindable

}