Created
April 18, 2017 12:50
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trait Show[A] { | |
def show(a: A): String | |
} | |
object Show { | |
def apply[A](implicit sh: Show[A]): Show[A] = sh | |
//needed only if we want to support notation: show(...) | |
def show[A: Show](a: A) = Show[A].show(a) | |
implicit class ShowOps[A: Show](a: A) { | |
def show = Show[A].show(a) | |
} | |
//type class instances | |
implicit val intCanShow: Show[Int] = | |
int => s"int $int" | |
implicit val stringCanShow: Show[String] = | |
str => s"string $str" | |
} |
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