[ruby] check whether object is of RTypedData using RTYPEDDATA_P.

Examples/test-suite/ruby/Makefile.in

@@ -26,6 +26,7 @@ CPP_TEST_CASES = \
 	ruby_keywords \
 	ruby_minherit_shared_ptr \
 	ruby_naming \
+	ruby_rdata \
 	ruby_track_objects \
 	ruby_track_objects_directors \
 	std_containers \

Examples/test-suite/ruby/ruby_rdata_runme.rb

@@ -0,0 +1,7 @@
+require 'swig_assert'
+require 'ruby_rdata'
+
+include Ruby_rdata
+
+swig_assert_equal_simple(1, take_proc_or_cpp_obj_and_ret_1(Proc.new{}))
+swig_assert_equal_simple(1, take_proc_or_cpp_obj_and_ret_1(C.new))

Examples/test-suite/ruby_rdata.i

@@ -0,0 +1,20 @@
+%module ruby_rdata
+
+%{
+
+  class C {};
+
+  int take_proc_or_cpp_obj_and_ret_1(VALUE obj) {
+    return 1;
+  }
+
+  int take_proc_or_cpp_obj_and_ret_1(class C) {
+    return 1;
+  }
+
+%}
+
+class C {};
+
+int take_proc_or_cpp_obj_and_ret_1(VALUE);
+int take_proc_or_cpp_obj_and_ret_1(C);