NewtypeValidated

A validated Newtype.

This class is for defining newtypes with a builder that validates values.

Example:

 type EmailAddress = EmailAddress.Type

 object EmailAddress extends NewtypeValidated[String] {
   def apply(v: String): Either[BuildFailure[Type], Type] =
     if (v.contains("@"))
       Right(unsafeCoerce(v))
     else
       Left(BuildFailure("missing @"))
 }