UnaryExpression.cs

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// -------------------------------------------------------------------------- //
// Project rROTOR                                                             //
// -------------------------------------------------------------------------- //
// File: UnaryExpression.cs                                                   //
// Authors: Cristina Gonzalez Muñoz  -  cristi.gm@gmail.com                   //
//          Francisco Ortin - francisco.ortin@gmail.com                       //
// Description:                                                               //
//    Encapsulates a unary expression of our programming language.            //
//    Inheritance: Expression.                                                //
//    Implements Composite pattern [Composite].                               //
//    Implements Visitor pattern [Concrete Element].                          //
// -------------------------------------------------------------------------- //
// Create date: 05-12-2006                                                    //
// Modification date: 25-04-2007                                              //

using System;
using System.Collections.Generic;
using System.Text;

using Tools;
using ErrorManagement;

namespace AST
{
   #region UnaryOperator

   public enum UnaryOperator
   {
      PrefixIncrement,

      PrefixDecrement,

      PostfixIncrement,

      PostfixDecrement,

      Not,

      BitwiseNot,

      Minus,

      Plus
   }

   #endregion

   public class UnaryExpression : Expression
   {
      #region Fields

      private Expression operand;

      private UnaryOperator op;

      #endregion

      #region Properties

      public Expression Operand
      {
         get { return operand; }
         set { this.operand = value; }
      }

      public UnaryOperator Operator
      {
         get { return op; }
      }

      #endregion

      #region Constructor

      public UnaryExpression(Expression operand, UnaryOperator op, Location location)
         : base(location)
      {
         this.operand = operand;
         this.op = op;
      }

      #endregion

      #region Accept()

      public override Object Accept(Visitor v, Object o)
      {
         return v.Visit(this, o);
      }

      #endregion

      #region ToString()
      public override string ToString() {
          return this.op.ToString();
      }
      #endregion
   }
}