Scala example source code file (implicits.scala)

This example Scala source code file (implicits.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

a, a, b, b, c1435, c1492, column, e, invoker, query, query, wrapped, x, x

The Scala implicits.scala source code

// #1435
object t1435 {
  implicit def a(s:String):String = error("")
  implicit def a(i:Int):String = error("")
  implicit def b(i:Int):String = error("")
}

class C1435 {
  val v:String = {
    import t1435.a
    2
  }
}

// #1492
class C1492 {

  class X

  def foo(x: X => X) {}

  foo ( implicit x => implicitly[X] )
  foo { implicit x => implicitly[X] }
}

// #1579
object Test1579 {
  class Column
  class Query[E](val value: E)
  class Invoker(q: Any) { val foo = null }

  implicit def unwrap[C](q: Query[C]) = q.value
  implicit def invoker(q: Query[Column]) = new Invoker(q)

  val q = new Query(new Column)
  q.foo
}
// #1625
object Test1625 {

  class Wrapped(x:Any) {
    def unwrap() = x
  }

  implicit def byName[A](x: =>A) = new Wrapped(x)

  implicit def byVal[A](x: A) = x
  
  def main(args: Array[String]) = {

//    val res:Wrapped = 7 // works

    val res = 7.unwrap() // doesn't work

    println("=> result: " + res)
  }
}

object Test2188 {
  implicit def toJavaList[A: ClassManifest](t:collection.Seq[A]):java.util.List[A] = java.util.Arrays.asList(t.toArray:_*)   

  val x: java.util.List[String] = List("foo")
}

object TestNumericWidening {
  val y = 1
  val x: java.lang.Long = y
}

// #2709 
package foo2709 { 
  class A 
  class B 
 
  package object bar { 
    implicit def a2b(a: A): B = new B 
  } 
 
  package bar { 
    object test { 
      new A: B 
    } 
  } 
} 

// Problem with specs
object specsProblem {
  println(implicitly[Manifest[Class[_]]])
}