implicit_dsls.scala

import scala.language.experimental.macros

object implicit_dsls extends App {

  trait DSLImpl {

    def getImpl(route: String)(action: => Any): Unit
    
  }

  object MacroDSL {

    import scala.reflect.macros.blackbox.Context

    def getImplM(c: Context)(route: c.Expr[String])(action: c.Expr[Any]): c.Expr[Unit] = {
      c.universe.reify {
        println("macro get")
      }
    }

    implicit val macroDSLImpl = new DSLImpl {

      // macros cant implement abstract methods
      //
      // def getImpl(route: String)(action: => Any): Unit = macro getImplM

      def getImpl(route: String)(action: => Any): Unit = {}

    }

  }
  
  

  object DefaultDSL {

    implicit val defaultDSLImpl = new DSLImpl {

      def getImpl(route: String)(action: => Any): Unit = {
        println("default get")
      }

    }

  }

  
  
  trait DSL

  object DSL extends DSL {

    def get(route: String)(action: => Any)(implicit dslImpl: DSLImpl) = dslImpl.getImpl(route)(action)

  }


  // import DefaultDSL._
  import MacroDSL._

  DSL.get("/foo") {
    "ok"
  }


}