1 files changed, 39 insertions, 0 deletions
diff --git a/src/ProtocolBuffers/GeneratedSingleExtension.cs b/src/ProtocolBuffers/GeneratedSingleExtension.cs
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+++ b/src/ProtocolBuffers/GeneratedSingleExtension.cs
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+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.
+// http://code.google.com/p/protobuf/
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+using System;
+using Google.ProtocolBuffers.Descriptors;
+
+namespace Google.ProtocolBuffers {
+
+  /// <summary>
+  /// Generated extension for a singular field.
+  /// </remarks>
+  public sealed class GeneratedSingleExtension<TExtension> : GeneratedExtensionBase<TExtension>  {
+    internal GeneratedSingleExtension(FieldDescriptor descriptor) : base(descriptor, typeof(TExtension)) {
+    }
+
+    public static GeneratedSingleExtension<TExtension> CreateInstance(FieldDescriptor descriptor) {
+      if (descriptor.IsRepeated) {
+        throw new ArgumentException("Must call GeneratedRepeateExtension.CreateInstance() for repeated types.");
+      }
+      return new GeneratedSingleExtension<TExtension>(descriptor);
+    }
+
+    public override object FromReflectionType(object value) {
+      return base.SingularFromReflectionType(value);
+    }
+  }
+}