From 54176b26a9be6c9903b375596b778f51f5947921 Mon Sep 17 00:00:00 2001
From: Sydney Acksman <ObsidianMinor@users.noreply.github.com>
Date: Mon, 24 Sep 2018 15:42:24 -0500
Subject: C# Proto2 feature : Field presence and default values (#4642)

* Compiler changes

* Generated code changes

* Library changes

* Compiler style changes

* Generated style changes

* Fix Windows build errors

* Implement changes from review

* Reintroduce proto2 check

* Compiler changes (required handling review)

* Generated code changes (required handling review)

* Library changes (required handling review

* Field presence rewrite (compiler changes)

* Field presence rewrite (generated code changes)

* Compiler comment

* IFieldAccessor.HasValue library implementation

* Remove Clear methods and default values from proto3 code (Compiler)

* Remove Clear methods and default values from proto3 code (Generated)

* Remove Clear methods and default values from proto3 code (Library)

* Fix distcheck error

* Rewrite default string values to use base64 and convert

* Library changes (IMessage2)

* Compiler changes (IMessage2)

* Generated changes (IMessage2)

* Rebased and regenerated

* Compiler changes (initialized extension)

* Generated changes (initialized extension)

* Library changes (initialized extension)

* Refactor MessageExtensions.IsRequired

* Move string default value creator and bytes default value creator back to seperate methods

* Dead code cleanup

* Fixed segmentation fault
Removed unused header method declarations
---
 csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs')

diff --git a/csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs b/csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs
index cfe56fde..8f7ef3c6 100644
--- a/csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs
+++ b/csharp/src/Google.Protobuf/Reflection/IFieldAccessor.cs
@@ -51,6 +51,11 @@ namespace Google.Protobuf.Reflection
         /// </summary>
         void Clear(IMessage message);
 
+        /// <summary>
+        /// Indicates whether the field in the specified message is set. For proto3 fields, this throws an <see cref="InvalidOperationException"/>
+        /// </summary>
+        bool HasValue(IMessage message);
+
         /// <summary>
         /// Fetches the field value. For repeated values, this will be an
         /// <see cref="IList"/> implementation. For map values, this will be an
-- 
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