Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,42 @@
+//------------------------------------------------------------------------------
+// <copyright file="CapabilitiesAssignment.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;
+
+    //
+    // Implementation of the foo = ${bar}-something-%{que}
+    // expand the pattern on the right and store it in the %{foo} variable
+    //
+    internal class CapabilitiesAssignment : CapabilitiesRule {
+        internal String _var;
+        internal CapabilitiesPattern _pat;
+
+        internal CapabilitiesAssignment(String var, CapabilitiesPattern pat) {
+            _type = Assign;
+            _var = var;
+            _pat = pat;
+        }
+
+        internal override void Evaluate(CapabilitiesState state) {
+            state.SetVariable(_var, _pat.Expand(state));
+            state.Exit = false;
+        }
+    }
+}