Added the ability to use an IEnumerable<T> when adding to a list, so you can do:

new Foo.Builder {
   RepeatedValue = { x.Select(y) }
};

... a bit like LINQ to XML.

2 files changed, 56 insertions, 1 deletions

diff --git a/src/ProtocolBuffers/Collections/IPopsicleList.cs b/src/ProtocolBuffers/Collections/IPopsicleList.cs
new file mode 100644
index 00000000..de59de94
--- /dev/null
+++ b/src/ProtocolBuffers/Collections/IPopsicleList.cs
@@ -0,0 +1,48 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+using System.Collections.Generic;
+
+namespace Google.ProtocolBuffers.Collections {
+  /// <summary>
+  /// A list which has an Add method which accepts an IEnumerable[T].
+  /// This allows whole collections to be added easily using collection initializers.
+  /// It causes a potential overload confusion if T : IEnumerable[T], but in
+  /// practice that won't happen in protocol buffers.
+  /// </summary>
+  /// <remarks>This is only currently implemented by PopsicleList, and it's likely
+  /// to stay that way - hence the name. More genuinely descriptive names are
+  /// horribly ugly. (At least, the ones the author could think of...)</remarks>
+  /// <typeparam name="T">The element type of the list</typeparam>
+  public interface IPopsicleList<T> : IList<T> {
+    void Add(IEnumerable<T> collection);
+  }
+}
diff --git a/src/ProtocolBuffers/Collections/PopsicleList.cs b/src/ProtocolBuffers/Collections/PopsicleList.cs
index a7d01553..26996d9b 100644
--- a/src/ProtocolBuffers/Collections/PopsicleList.cs
+++ b/src/ProtocolBuffers/Collections/PopsicleList.cs
@@ -39,7 +39,7 @@ namespace Google.ProtocolBuffers.Collections {
   /// to be made read-only (with the <see cref="MakeReadOnly" /> method), 
   /// after which any modifying methods throw <see cref="NotSupportedException" />.
   /// </summary>
-  public sealed class PopsicleList<T> : IList<T> {
+  public sealed class PopsicleList<T> : IPopsicleList<T> {
 
     private readonly List<T> items = new List<T>();
     private bool readOnly = false;
@@ -108,6 +108,13 @@ namespace Google.ProtocolBuffers.Collections {
       return items.Remove(item);
     }
 
+    public void Add(IEnumerable<T> collection) {
+      if (readOnly) {
+        throw new NotSupportedException("List is read-only");
+      }
+      items.AddRange(collection);
+    }
+
     public IEnumerator<T> GetEnumerator() {
       return items.GetEnumerator();
     }