Add deriving to derive type-class from the base type

[kevin-lee]

Summary

Add deriving to derive type-class from the base type

Version

unreleased

Description

import cats.*

type MyType = MyType.Type
object MyType extends Refined[String] {

  override inline def invalidReason(a: String): String =
    "It has to be a non-empty String but got [" + a + "]"

  override inline def predicate(a: String): Boolean = a != ""

  given eqMyType: Eq[MyType] = deriving[Eq]

  given showMyType: Show[MyType] = deriving[Show]
}

import cats.syntax.all.*

MyType("blah") === MyType("blah")
// Boolean = true

MyType("blah").show
// String = blah