nameOf macro

NameOf.scala

import scala.language.experimental.macros
import scala.reflect.macros.whitebox.Context

object NameOf {
  
  def nameOf[A](expr: A => Any): String = macro nameOf_macro[A]
  
  def nameOf_macro[A: c.WeakTypeTag](c: Context)(expr: c.Expr[A => Any]): c.Expr[String] = {
    import c.universe._
    expr.tree match {
      case Function(_, tree) =>
        c.Expr[String](Literal(Constant(
          tree.symbol.name.encodedName.toString()
        )))
      case _ => throw new Exception
    }
  }
  
}

NameOfSample.scala

case class Person(name: String, age: Int)

object NameOfSample {

  import NameOf._

  def main(args: Array[String]): Unit = {
    
    println(nameOf[Person](_.name))
    // "name"
    
    println(nameOf[Person](_.age))
    // "age"
  }

}