1 files changed, 75 insertions, 0 deletions
diff --git a/src/ProtoGen/EnumFieldGenerator.cs b/src/ProtoGen/EnumFieldGenerator.cs
new file mode 100644
index 00000000..9f6a56f2
--- /dev/null
+++ b/src/ProtoGen/EnumFieldGenerator.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Google.ProtocolBuffers.Descriptors;
+
+namespace Google.ProtocolBuffers.ProtoGen {
+  internal class EnumFieldGenerator : FieldGeneratorBase, IFieldSourceGenerator {
+    internal EnumFieldGenerator(FieldDescriptor descriptor)
+        : base(descriptor) {
+    }
+
+    public void GenerateMembers(TextGenerator writer) {
+      writer.WriteLine("private bool has{0};", CapitalizedName);
+      writer.WriteLine("private {0} {1}_ = {2};", TypeName, Name, DefaultValue);
+      writer.WriteLine("public bool Has{0} {{", CapitalizedName);
+      writer.WriteLine("  get {{ return has{0}; }}", CapitalizedName);
+      writer.WriteLine("}");
+      writer.WriteLine("public {0} {1} {{", TypeName, PropertyName);
+      writer.WriteLine("  get {{ return {0}_; }}", Name);
+      writer.WriteLine("}");
+    }
+
+    public void GenerateBuilderMembers(TextGenerator writer) {
+      writer.WriteLine("public bool Has{0} {{", CapitalizedName);
+      writer.WriteLine(" get {{ return result.Has{0}; }}", CapitalizedName);
+      writer.WriteLine("}");
+      writer.WriteLine("public {0} {1} {{", TypeName, PropertyName);
+      writer.WriteLine("  get {{ return result.{0}; }}", PropertyName);
+      writer.WriteLine("  set {{ Set{0}(value); }}", CapitalizedName);
+      writer.WriteLine("}");
+      writer.WriteLine("public Builder Set{0}({1} value) {{", CapitalizedName, TypeName);
+      writer.WriteLine("  result.has{0} = true;", CapitalizedName);
+      writer.WriteLine("  result.{0}_ = value;", Name);
+      writer.WriteLine("  return this;");
+      writer.WriteLine("}");
+      writer.WriteLine("public Builder Clear{0}() {{", CapitalizedName);
+      writer.WriteLine("  result.has{0} = false;", CapitalizedName);
+      writer.WriteLine("  result.{0}_ = {1};", Name, DefaultValue);
+      writer.WriteLine("  return this;");
+      writer.WriteLine("}");
+    }
+
+    public void GenerateMergingCode(TextGenerator writer) {
+      writer.WriteLine("if (other.Has{0}) {{", CapitalizedName);
+      writer.WriteLine("  {0} = other.{0};", PropertyName);
+      writer.WriteLine("}");
+    }
+
+    public void GenerateBuildingCode(TextGenerator writer) {
+      // Nothing to do here for enum types
+    }
+
+    public void GenerateParsingCode(TextGenerator writer) {
+      // TODO(jonskeet): Make a more efficient way of doing this
+      writer.WriteLine("int rawValue = input.ReadEnum();");
+      writer.WriteLine("if (!global::System.Enum.IsDefined(typeof({0}), rawValue)) {{", TypeName);
+      writer.WriteLine("  unknownFields.MergeVarintField({0}, (ulong) rawValue);", Number);
+      writer.WriteLine("} else {");
+      writer.WriteLine("  {0} = ({1}) rawValue;", PropertyName, TypeName);
+      writer.WriteLine("}");
+    }
+
+    public void GenerateSerializationCode(TextGenerator writer) {
+      writer.WriteLine("if (Has{0}) {{", CapitalizedName);
+      writer.WriteLine("  output.WriteEnum({0}, (int) {1});", Number, PropertyName);
+      writer.WriteLine("}");
+    }
+
+    public void GenerateSerializedSizeCode(TextGenerator writer) {
+      writer.WriteLine("if (Has{0}) {{", CapitalizedName);
+      writer.WriteLine("  size += pb::CodedOutputStream.ComputeEnumSize({0}, (int) {1});", Number, PropertyName);
+      writer.WriteLine("}");    
+    }
+  }
+}