83 lines
2.4 KiB
C#
83 lines
2.4 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="Operator.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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namespace MS.Internal.Xml.XPath {
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using System;
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using System.Xml;
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using System.Xml.XPath;
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using System.Diagnostics;
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using System.Globalization;
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internal class Operator : AstNode {
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public enum Op { // order is alligned with XPathOperator
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INVALID,
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/*Logical */
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OR,
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AND,
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/*Equality */
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EQ,
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NE,
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/*Relational*/
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LT,
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LE,
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GT,
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GE,
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/*Arithmetic*/
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PLUS,
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MINUS,
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MUL,
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DIV,
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MOD,
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/*Union */
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UNION,
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};
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static Op[] invertOp = {
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/*INVALID*/ Op.INVALID,
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/*OR */ Op.INVALID,
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/*END */ Op.INVALID,
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/*EQ */ Op.EQ,
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/*NE */ Op.NE,
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/*LT */ Op.GT,
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/*LE */ Op.GE,
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/*GT */ Op.LT,
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/*GE */ Op.LE,
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};
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static public Operator.Op InvertOperator(Operator.Op op) {
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Debug.Assert(Op.EQ <= op && op <= Op.GE);
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return invertOp[(int)op];
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}
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private Op opType;
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private AstNode opnd1;
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private AstNode opnd2;
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public Operator(Op op, AstNode opnd1, AstNode opnd2) {
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this.opType = op;
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this.opnd1 = opnd1;
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this.opnd2 = opnd2;
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}
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public override AstType Type { get {return AstType.Operator;} }
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public override XPathResultType ReturnType {
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get {
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if (opType <= Op.GE) {
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return XPathResultType.Boolean;
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}
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if (opType <= Op.MOD) {
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return XPathResultType.Number;
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}
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return XPathResultType.NodeSet;
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}
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}
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public Op OperatorType { get { return opType; } }
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public AstNode Operand1 { get { return opnd1; } }
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public AstNode Operand2 { get { return opnd2; } }
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}
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}
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