/interpreter/tags/at2-build270707/src/edu/vub/at/objects/grammar/ATSelection.java

 1/**
 2 * AmbientTalk/2 Project
 3 * ATSelection.java created on 26-jul-2006 at 15:02:17
 4 * (c) Programming Technology Lab, 2006 - 2007
 5 * Authors: Tom Van Cutsem & Stijn Mostinckx
 6 * 
 7 * Permission is hereby granted, free of charge, to any person
 8 * obtaining a copy of this software and associated documentation
 9 * files (the "Software"), to deal in the Software without
10 * restriction, including without limitation the rights to use,
11 * copy, modify, merge, publish, distribute, sublicense, and/or
12 * sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following
14 * conditions:
15 *
16 * The above copyright notice and this permission notice shall be
17 * included in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
27 */
28package edu.vub.at.objects.grammar;
29
30/**
31 * The public interface to a selection AG element.
32 * 
33 * Example: <code>o.&x</code>
34 * 
35 * @author tvcutsem
36 */
37public interface ATSelection extends ATExpression {
38
39	/**
40	 * The receiver may be any valid AmbientTalk expression
41	 * Example: <code>`(o.&x).reveiverExpression == `o</code>
42	 * @return the reveiver expression
43	 */
44	public ATExpression base_receiverExpression();
45	
46	/**
47	 * The selector must be a literal symbol
48	 * Example: <code>`(o.&x).selector == `x</code>
49	 * @return the selector
50	 */
51	public ATSymbol base_selector();
52	
53}