Scala example source code file (NamedParam.scala)

This example Scala source code file (NamedParam.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

any, any, manifest, manifest, namedparam, namedparam, namedparamclass, namedparamcreator, string, string, t, typed, untyped

The Scala NamedParam.scala source code

/* NSC -- new Scala compiler
 * Copyright 2005-2011 LAMP/EPFL
 * @author Paul Phillips
 */

package scala.tools.nsc
package interpreter

import NamedParam._

trait NamedParamCreator {
  protected def freshName: () => String

  def apply(name: String, tpe: String, value: Any): NamedParam = NamedParamClass(name, tpe, value)
  def apply[T: Manifest](name: String, x: T): NamedParam = new Typed[T](name, x)
  def apply[T: Manifest](x: T): NamedParam = apply(freshName(), x)
  
  def clazz(name: String, x: Any): NamedParam = new Untyped(name, x)
  def clazz(x: Any): NamedParam = clazz(freshName(), x)

  implicit def namedValue[T: Manifest](name: String, x: T): NamedParam = apply(name, x)
  implicit def tuple[T: Manifest](pair: (String, T)): NamedParam       = apply(pair._1, pair._2)
}

object NamedParam extends NamedParamCreator {
  class Typed[T: Manifest](val name: String, val value: T) extends NamedParam {
    val tpe = TypeStrings.fromManifest[T]
  }
  class Untyped(val name: String, val value: Any) extends NamedParam {
    val tpe = TypeStrings.fromValue(value)
  }
  
  protected val freshName = { 
    var counter = 0
    () => { counter += 1; "p" + counter }
  }
}

case class NamedParamClass(name: String, tpe: String, value: Any) extends NamedParam { }

trait NamedParam {
  def name: String
  def tpe: String
  def value: Any
  override def toString = name + ": " + tpe
}