Handle JSON parsing for Any.

This required a rework of the tokenizer to allow for a "replaying" tokenizer, basically in case the @type value comes after the data itself. This rework is nice in some ways (all the pushback and object depth logic in one place) but is a little fragile in terms of token push-back when using the replay tokenizer. It'll be fine for the scenario we need it for, but we should be careful...

1 files changed, 8 insertions, 3 deletions

diff --git a/csharp/src/Google.Protobuf/JsonFormatter.cs b/csharp/src/Google.Protobuf/JsonFormatter.cs
index c7d392cd..45941b39 100644
--- a/csharp/src/Google.Protobuf/JsonFormatter.cs
+++ b/csharp/src/Google.Protobuf/JsonFormatter.cs
@@ -808,12 +808,17 @@ namespace Google.Protobuf
         /// </summary>
         public sealed class Settings
         {
-            private static readonly Settings defaultInstance = new Settings(false);
-
             /// <summary>
             /// Default settings, as used by <see cref="JsonFormatter.Default"/>
             /// </summary>
-            public static Settings Default { get; } = new Settings(false);
+            public static Settings Default { get; }
+
+            // Workaround for the Mono compiler complaining about XML comments not being on
+            // valid language elements.
+            static Settings()
+            {
+                Default = new Settings(false);
+            }
 
             /// <summary>
             /// Whether fields whose values are the default for the field type (e.g. 0 for integers)