import scala.tools.nsc._

object Test {

  /**
   *  Type inference overlooks constraints posed by type parameters in annotations on types.
   */

  val testCode = <code>

    class posingAs[A] extends TypeConstraint

    def resolve[A,B](x: A @posingAs[B]): B = x.asInstanceOf[B]

    val x = resolve(7: @posingAs[Any])

  </code>.text

  def main(args: Array[String]) = {

    val tool = new Interpreter(new Settings())
    val global = tool.compiler

    import global._
    import definitions._

    object checker extends AnnotationChecker {

      /** Check annotations to decide whether tpe1 <:< tpe2 */
      def annotationsConform(tpe1: Type, tpe2: Type): Boolean = {

        tpe1.annotations.forall(a1 => tpe2.annotations.forall(a2 => a1.atp <:< a2.atp))

      }
    }

    global.addAnnotationChecker(checker)

    tool.interpret(testCode)

  }

}