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1 office 1 /*
2 * ExprValue.java
3 *
4 * Copyright (c) 1997 Cornell University.
5 * Copyright (c) 1997 Sun Microsystems, Inc.
6 *
7 * See the file "license.terms" for information on usage and
8 * redistribution of this file, and for a DISCLAIMER OF ALL
9 * WARRANTIES.
10 *
11 * Included in SQLite3 port to C# for use in testharness only; 2008 Noah B Hart
12 *
13 * RCS @(#) $Id: ExprValue.java,v 1.2 1999/05/09 00:03:00 dejong Exp $
14 *
15 */
16 using System;
17 namespace tcl.lang
18 {
19  
20 /// <summary> Describes an expression value, which can be either an integer (the
21 /// usual case), a double-precision floating-point value, or a string.
22 /// A given number has only one value at a time.
23 /// </summary>
24  
25 class ExprValue
26 {
27 internal const int ERROR = 0;
28 internal const int INT = 1;
29 internal const int DOUBLE = 2;
30 internal const int STRING = 3;
31  
32 /// <summary> Integer value, if any.</summary>
33 internal long intValue;
34  
35 /// <summary> Floating-point value, if any.</summary>
36 internal double doubleValue;
37  
38 /// <summary> Used to hold a string value, if any.</summary>
39 internal string stringValue;
40  
41 /// <summary> Type of value: INT, DOUBLE, or STRING.</summary>
42 internal int type;
43  
44 /// <summary> Constructors.</summary>
45 internal ExprValue()
46 {
47 type = ERROR;
48 }
49  
50 internal ExprValue( long i )
51 {
52 intValue = i;
53 type = INT;
54 }
55  
56 internal ExprValue( double d )
57 {
58 doubleValue = d;
59 type = DOUBLE;
60 }
61  
62 internal ExprValue( string s )
63 {
64 stringValue = s;
65 type = STRING;
66 }
67 }
68 }