blob: c04d988f08792c8e47d2e2397ff245ccb8a05920 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2009, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id: EmptyMap.scala 16893 2009-01-13 13:09:22Z cunei $
package scalax.collection.immutable
/** This class implements empty immutable maps
* @author Martin Oderskty
* @version 1.0, 019/01/2007
*/
@serializable
class EmptyMap[A, B] extends Map[A, B] {
def size: Int = 0
def get(key: A): Option[B] = None
def elements: Iterator[(A, B)] = Iterator.empty
def update (key: A, value: B): Map[A, B] = new Map1(key, value)
def - (key: A): Map[A, B] = this
}
|
