Operator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XPath / Internal / Operator.cs / 1305376 / Operator.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
namespace MS.Internal.Xml.XPath { 
    using System;
    using System.Xml; 
    using System.Xml.XPath;
    using System.Diagnostics;
    using System.Globalization;
    internal class Operator : AstNode { 
        public enum Op { // order is alligned with XPathOperator
            INVALID, 
            /*Logical   */ 
            OR,
            AND, 
            /*Equality  */
            EQ,
            NE,
            /*Relational*/ 
            LT,
            LE, 
            GT, 
            GE,
            /*Arithmetic*/ 
            PLUS,
            MINUS,
            MUL,
            DIV, 
            MOD,
            /*Union     */ 
            UNION, 
        };
 
        static Op[] invertOp = {
            /*INVALID*/ Op.INVALID,
            /*OR     */ Op.INVALID,
            /*END    */ Op.INVALID, 
            /*EQ     */ Op.EQ,
            /*NE     */ Op.NE, 
            /*LT     */ Op.GT, 
            /*LE     */ Op.GE,
            /*GT     */ Op.LT, 
            /*GE     */ Op.LE,
        };

        static public Operator.Op InvertOperator(Operator.Op op) { 
            Debug.Assert(Op.EQ <= op && op <= Op.GE);
            return invertOp[(int)op]; 
        } 

        private Op opType; 
        private AstNode opnd1;
        private AstNode opnd2;

        public Operator(Op op, AstNode opnd1, AstNode opnd2) { 
            this.opType = op;
            this.opnd1 = opnd1; 
            this.opnd2 = opnd2; 
        }
 
        public override AstType Type { get {return  AstType.Operator;} }
        public override XPathResultType ReturnType {
            get {
                if (opType <= Op.GE) { 
                    return XPathResultType.Boolean;
                } 
                if (opType <= Op.MOD) { 
                    return XPathResultType.Number;
                } 
                return XPathResultType.NodeSet;
            }
        }
 
        public Op      OperatorType { get { return opType; } }
        public AstNode Operand1     { get { return opnd1;  } } 
        public AstNode Operand2     { get { return opnd2;  } } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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