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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection
package mutable
/** The reason for this class is so that we can
* have both a generic immutable `+` with signature
*
* def + [B1 >: B](kv: (A, B1)): Map[A, B1]
*
* and a (deprecated) mutable `+` of signature
*
* def + (kv: (A, B)): this.type = this += kv
*
* The former is required to fulfill the Map contract.
* The latter is required for backwards compatibility.
* We can't have both methods in the same class, as that would give a double definition.
* They are OK in different classes though, and narrowly escape a `same erasure' problem.
* Once the deprecated + goes away we can do without class MapLikeBase.
*
* @author Martin Odersky
* @version 2.8
* @since 2.8
*/
trait MapLikeBase[A, B, +This <: MapLikeBase[A, B, This] with Map[A, B]]
extends scala.collection.MapLike[A, B, This] with Cloneable[This] {
def + [B1 >: B] (kv: (A, B1)): mutable.Map[A, B1] = clone().asInstanceOf[mutable.Map[A, B1]] += kv
}
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