Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Data.SqlXml/System/Xml/Xsl/XPath/XPathOperator.cs

@@ -0,0 +1,53 @@
+//------------------------------------------------------------------------------
+// <copyright file="XPathOperator.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Xsl.XPath {
+    // order is importent. We are using them as an index in OperatorGroup & QilOperator & XPathOperatorToQilNodeType arrays
+    // (ValEq - Eq) == (ValGe - Ge)
+    internal enum XPathOperator {
+        /*Unknown   */ 
+        Unknown = 0,
+        // XPath 1.0 operators:
+        /*Logical   */ 
+        Or, 
+        And,
+        /*Equality  */ 
+        Eq, 
+        Ne,
+        /*Relational*/ 
+        Lt, 
+        Le, 
+        Gt, 
+        Ge,
+        /*Arithmetic*/ 
+        Plus, 
+        Minus, 
+        Multiply, 
+        Divide, 
+        Modulo,
+        /*Negate    */
+        UnaryMinus,
+        /*Union     */ 
+        Union,
+        LastXPath1Operator = Union,
+        /* XQuery & XPath 2.0 Operators: */
+        UnaryPlus,
+        Idiv,
+        Is,
+        After,
+        Before,
+        Range,
+        Except,
+        Intersect,
+        ValEq,
+        ValNe,
+        ValLt,
+        ValLe,
+        ValGt,
+        ValGe
+    }
+}