Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.SqlXml/System/Xml/Xsl/XsltOld/Event.cs

@@ -0,0 +1,28 @@
+//------------------------------------------------------------------------------
+// <copyright file="Event.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Xsl.XsltOld {
+    using Res = System.Xml.Utils.Res;
+    using System;
+    using System.Diagnostics;
+    using System.Xml;
+    using System.Xml.XPath;
+    using System.Xml.Xsl.XsltOld.Debugger;
+
+    internal abstract class Event {
+        public virtual void ReplaceNamespaceAlias(Compiler compiler) {}        
+        public abstract bool Output(Processor processor, ActionFrame frame);
+
+        internal void OnInstructionExecute(Processor processor) {
+            Debug.Assert(processor.Debugger != null, "We don't generate calls this function if ! debugger");
+            Debug.Assert(DbgData.StyleSheet != null, "We call this function from *EventDbg only");
+            processor.OnInstructionExecute();
+        }
+
+        internal virtual DbgData DbgData { get { return DbgData.Empty; } }
+    }
+}