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Scala example source code file (MatchError.scala)

This example Scala source code file (MatchError.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, matcherror, matcherror, runtimeexception, runtimeexception

The Scala MatchError.scala source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2002-2011, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */



package scala

/** This class implements errors which are thrown whenever an
 *  object doesn't match any pattern of a pattern matching
 *  expression.
 *  
 *  @author  Matthias Zenger
 *  @author  Martin Odersky
 *  @version 1.1, 05/03/2004
 *  @since   2.0
 */
final class MatchError(obj: Any) extends RuntimeException {
  /** There's no reason we need to call toString eagerly,
   *  so defer it until getMessage is called.
   */
  private lazy val objString =
    if (obj == null) "null"
    else obj.toString() + " (of class " + obj.asInstanceOf[AnyRef].getClass.getName + ")"

  override def getMessage() = objString
}

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