/*
* ExprValue.java
*
* Copyright (c) 1997 Cornell University.
* Copyright (c) 1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and
* redistribution of this file, and for a DISCLAIMER OF ALL
* WARRANTIES.
* 
* Included in SQLite3 port to C# for use in testharness only;  2008 Noah B Hart
*
* RCS @(#) $Id: ExprValue.java,v 1.2 1999/05/09 00:03:00 dejong Exp $
*
*/
using System;
namespace tcl.lang
{

  /// <summary> Describes an expression value, which can be either an integer (the
  /// usual case), a double-precision floating-point value, or a string.
  /// A given number has only one value at a time.
  /// </summary>

  class ExprValue
  {
    internal const int ERROR = 0;
    internal const int INT = 1;
    internal const int DOUBLE = 2;
    internal const int STRING = 3;

    /// <summary> Integer value, if any.</summary>
    internal long intValue;

    /// <summary> Floating-point value, if any.</summary>
    internal double doubleValue;

    /// <summary> Used to hold a string value, if any.</summary>
    internal string stringValue;

    /// <summary> Type of value: INT, DOUBLE, or STRING.</summary>
    internal int type;

    /// <summary> Constructors.</summary>
    internal ExprValue()
    {
      type = ERROR;
    }

    internal ExprValue( long i )
    {
      intValue = i;
      type = INT;
    }

    internal ExprValue( double d )
    {
      doubleValue = d;
      type = DOUBLE;
    }

    internal ExprValue( string s )
    {
      stringValue = s;
      type = STRING;
    }
  }
}