1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2004 Open World Ltd
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.vm;
22
23 /**
24 * Refs are the run-time representation of variables. They are simply a slot
25 * pointing to the value of the variable. Maybe they will be augmented with
26 * debugging info later on e.g. variable name.
27 */
28 public final class Ref {
29
30 /**
31 * The value of the variable.
32 */
33 public Object value = null;
34
35 /**
36 * Constructs a new <code>Ref</code> with a default <code>null</code>
37 * value.
38 */
39 public Ref() {
40 }
41
42 /**
43 * Constructs a new <code>Ref</code> with the specified value.
44 *
45 * @param v the value for this reference
46 */
47 public Ref( final Object v ) {
48 this.value = v;
49 }
50
51 /**
52 * Returns the value associated with this reference.
53 *
54 * @return this references value
55 */
56 public Object getValue() {
57 return value;
58 }
59
60 /**
61 * @see java.lang.Object#toString()
62 */
63 @Override
64 public String toString() {
65 return "R( " + value + " )";
66 }
67
68 }