Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Configuration/CapabilitiesRule.cs

@@ -0,0 +1,46 @@
+//------------------------------------------------------------------------------
+// <copyright file="CapabilitiesRule.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.Configuration {
+    
+    using System.Collections;
+    using System.Collections.Specialized;
+    using System.Diagnostics;
+    using System.Globalization;
+    using System.Reflection;
+    using System.Security;
+    using System.Text;
+    using System.Text.RegularExpressions;
+    using System.Threading;
+    using System.Web.Caching;
+    using System.Web.Compilation;
+    using System.Web.Hosting;
+    using System.Security.Permissions;
+
+    //
+    // CapabilitiesRule is a step in the computation of a capabilities object. It can be either
+    // (1) import a string from the request object
+    // (2) assign a pattern into a variable
+    // (3) execute a subsequence if a regex matches
+    // (4) execute a subsequence and exit the block if a regex matches
+    //
+    internal abstract class CapabilitiesRule {
+        internal const int Use = 0;
+        internal const int Assign = 1;
+        internal const int Filter = 2;
+        internal const int Case = 3;
+
+        internal int _type;
+
+        internal virtual int Type {
+            get {
+                return _type;
+            }
+        }
+
+        internal abstract void Evaluate(CapabilitiesState state);
+    }
+}