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charmby/scala implicit.txt

Created August 21, 2019 08:12
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scala implicit.txt
import shapeless._
case class MyClass(field1: String, field2: Int)
def fieldName[A](fieldKey: Witness.Lt[_ <: Symbol])(implicit mkl: MkFieldLens[A, fieldKey.T]) = {
lens[A] >> fieldKey
fieldKey.value.name
}
println(fieldName[MyClass]('field1))
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