Generated dependent fields if they are of a union type.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -790,8 +790,11 @@ namespace CppSharp.Generators.CSharp
         }
 
         private void GenerateClassInternalsField(Field field)
-        {
-            if (field.Type.IsDependent && !field.Type.IsPointer())
+        {
+            // we do not support dependent fields yet, see https://github.com/mono/CppSharp/issues/197
+            Class @class;
+            if (field.Type.IsDependent && !field.Type.IsPointer() &&
+                !(field.Type.IsTagDecl(out @class) && @class.IsUnion))
                 return;
 
             var safeIdentifier = Helpers.SafeIdentifier(field.OriginalName);

tests/Basic/Basic.h

@@ -269,3 +269,12 @@ class HasIgnoredField
     Base<Derived> fieldOfIgnoredType;
 };
 
+template <typename T>
+class DependentTypeWithNestedIndependent
+{
+    union
+    {
+        int i;
+        long l;
+    };
+};