1/*
2 * [The "BSD license"]
3 * Copyright (c) 2011 Terence Parr
4 * All rights reserved.
5 *
6 * Conversion to C#:
7 * Copyright (c) 2011 Sam Harwell, Pixel Mine, Inc.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33namespace Antlr.Runtime
34{
35    using System;
36    using System.Runtime.InteropServices;
37
38    [StructLayout( LayoutKind.Sequential, Pack = 2 )]
39    public struct SlimToken
40        : IToken
41    {
42        private short _type;
43        private short _channel;
44        private short _startIndex;
45        private short _stopIndex;
46
47        public SlimToken(int type)
48            : this()
49        {
50            _type = (short)type;
51        }
52
53        #region IToken Members
54
55        string IToken.Text
56        {
57            get
58            {
59                return string.Empty;
60            }
61            set
62            {
63            }
64        }
65
66        public int Type
67        {
68            get
69            {
70                return _type;
71            }
72            set
73            {
74                _type = (short)value;
75            }
76        }
77
78        int IToken.Line
79        {
80            get
81            {
82                return 0;
83            }
84            set
85            {
86            }
87        }
88
89        int IToken.CharPositionInLine
90        {
91            get
92            {
93                return 0;
94            }
95            set
96            {
97            }
98        }
99
100        public int Channel
101        {
102            get
103            {
104                return _channel;
105            }
106            set
107            {
108                _channel = (short)value;
109            }
110        }
111
112        public int StartIndex
113        {
114            get
115            {
116                return _startIndex;
117            }
118            set
119            {
120                _startIndex = (short)value;
121            }
122        }
123
124        public int StopIndex
125        {
126            get
127            {
128                return _stopIndex;
129            }
130            set
131            {
132                _stopIndex = (short)value;
133            }
134        }
135
136        int IToken.TokenIndex
137        {
138            get
139            {
140                return 0;
141            }
142            set
143            {
144            }
145        }
146
147        ICharStream IToken.InputStream
148        {
149            get
150            {
151                return null;
152            }
153            set
154            {
155            }
156        }
157
158        #endregion
159    }
160}
161