clean up TypeDefinitionConverter code

AssetStudioUtility/Unity.CecilTools/Extensions/MethodDefinitionExtensions.cs

@@ -0,0 +1,50 @@
+// Unity C# reference source
+// Copyright (c) Unity Technologies. For terms of use, see
+// https://unity3d.com/legal/licenses/Unity_Reference_Only_License
+
+using Mono.Cecil;
+
+namespace Unity.CecilTools.Extensions
+{
+    static class MethodDefinitionExtensions
+    {
+        public static bool SameAs(this MethodDefinition self, MethodDefinition other)
+        {
+            // FIXME: should be able to compare MethodDefinition references directly
+            return self.FullName == other.FullName;
+        }
+
+        public static string PropertyName(this MethodDefinition self)
+        {
+            return self.Name.Substring(4);
+        }
+
+        public static bool IsConversionOperator(this MethodDefinition method)
+        {
+            if (!method.IsSpecialName)
+                return false;
+
+            return method.Name == "op_Implicit" || method.Name == "op_Explicit";
+        }
+
+        public static bool IsSimpleSetter(this MethodDefinition original)
+        {
+            return original.IsSetter && original.Parameters.Count == 1;
+        }
+
+        public static bool IsSimpleGetter(this MethodDefinition original)
+        {
+            return original.IsGetter && original.Parameters.Count == 0;
+        }
+
+        public static bool IsSimplePropertyAccessor(this MethodDefinition method)
+        {
+            return method.IsSimpleGetter() || method.IsSimpleSetter();
+        }
+
+        public static bool IsDefaultConstructor(MethodDefinition m)
+        {
+            return m.IsConstructor && !m.IsStatic && m.Parameters.Count == 0;
+        }
+    }
+}