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utaal/TypeclassInstanceName.scala

Created November 8, 2016 16:34
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https://twitter.com/travisbrown/status/795992815201304577 -inspired typeclass instance naming
Raw
TypeclassInstanceName.scala
case class Circle(radius: Double)
trait HasArea[A] {
def area(a: A): Double
}
implicit val `HasArea for Circle` = new HasArea[Circle] {
def area(circle: Circle): Double = Math.PI * Math.pow(circle.radius, 2)
}
println(implicitly[HasArea[Circle]].area(Circle(2)))
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