diff --git a/lib/ffi_generator/generators/from_c_generator/array_type.rb b/lib/ffi_generator/generators/from_c_generator/array_type.rb
index f4b4955..6e259f8 100644
--- a/lib/ffi_generator/generators/from_c_generator/array_type.rb
+++ b/lib/ffi_generator/generators/from_c_generator/array_type.rb
@@ -2,6 +2,9 @@ module FFIGenerate
   class Generator
     class ArrayType < Type
 
+      attr_reader :element_type
+      attr_reader :constant_size
+
       def initialize(element_type, constant_size)
         @element_type = element_type
         @constant_size = constant_size
diff --git a/lib/ffi_generator/generators/from_c_generator/by_value_type.rb b/lib/ffi_generator/generators/from_c_generator/by_value_type.rb
index 394ee80..4e86918 100644
--- a/lib/ffi_generator/generators/from_c_generator/by_value_type.rb
+++ b/lib/ffi_generator/generators/from_c_generator/by_value_type.rb
@@ -2,6 +2,8 @@ module FFIGenerate
   class Generator
     class ByValueType < Type
 
+      attr_reader :inner_type
+
       def initialize(inner_type)
         @inner_type = inner_type
       end
diff --git a/lib/ffi_generator/generators/from_c_generator/primitive_type.rb b/lib/ffi_generator/generators/from_c_generator/primitive_type.rb
index 708769a..0303f3e 100644
--- a/lib/ffi_generator/generators/from_c_generator/primitive_type.rb
+++ b/lib/ffi_generator/generators/from_c_generator/primitive_type.rb
@@ -2,6 +2,8 @@ module FFIGenerate
   class Generator
     class PrimitiveType < Type
 
+      attr_reader :clang_type
+
       def initialize(clang_type)
         @clang_type = clang_type
       end
diff --git a/lib/ffi_generator/generators/from_c_generator/struct_or_union.rb b/lib/ffi_generator/generators/from_c_generator/struct_or_union.rb
index 74cc46f..544f526 100644
--- a/lib/ffi_generator/generators/from_c_generator/struct_or_union.rb
+++ b/lib/ffi_generator/generators/from_c_generator/struct_or_union.rb
@@ -66,6 +66,14 @@ def write_ruby
         @written = true
       end
 
+      def struct?
+        !@is_union
+      end
+
+      def union?
+        @is_union
+      end
+
       def ruby_name
         @ruby_name ||= @name.to_ruby_classname
       end