1/* valausingdirective.vala
2 *
3 * Copyright (C) 2006-2008  Jürg Billeter
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Lesser General Public License for more details.
14
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
18 *
19 * Author:
20 * 	Jürg Billeter <j@bitron.ch>
21 */
22
23using GLib;
24
25/**
26 * A reference to a namespace symbol.
27 */
28public class Vala.UsingDirective : CodeNode {
29	/**
30	 * The symbol of the namespace this using directive is referring to.
31	 */
32	public weak Symbol namespace_symbol {
33		get {
34			if (unresolved_symbol != null) {
35				return unresolved_symbol;
36			}
37			return _namespace_symbol;
38		}
39		set {
40			if (value is UnresolvedSymbol) {
41				unresolved_symbol = (UnresolvedSymbol) value;
42				_namespace_symbol = null;
43			} else {
44				_namespace_symbol = value;
45				unresolved_symbol = null;
46			}
47		}
48	}
49
50	weak Symbol _namespace_symbol;
51	UnresolvedSymbol unresolved_symbol;
52
53	/**
54	 * Creates a new using directive.
55	 *
56	 * @param namespace_symbol namespace symbol
57	 * @return                 newly created using directive
58	 */
59	public UsingDirective (Symbol namespace_symbol, SourceReference? source_reference = null) {
60		this.namespace_symbol = namespace_symbol;
61		this.source_reference = source_reference;
62	}
63
64	public override void accept (CodeVisitor visitor) {
65		visitor.visit_using_directive (this);
66	}
67}
68