* fix the behavior when a module is included into a refinement.

  This change is a little tricky, so it might be better to prohibit
  module inclusion to refinements.

* include/ruby/ruby.h (RMODULE_INCLUDED_INTO_REFINEMENT): new flag
  to represent that a module (iclass) is included into a refinement.

* class.c (include_modules_at): set RMODULE_INCLUDED_INTO_REFINEMENT
  if klass is a refinement.

* eval.c (rb_mod_refine): set the superclass of a refinement to the
  refined class for super.

* eval.c (rb_using_refinement): skip the above superclass (the
  refined class) when creating iclasses for refinements.  Otherwise,
  `using Refinement1; using Refinement2' creates iclasses:
  <Refinement2> -> <RefinedClass> -> <Refinement1> -> RefinedClass,
  where <Module> is an iclass for Module, so RefinedClass is
  searched before Refinement1.  The correct iclasses should be
  <Refinement2> -> <Refinement1> -> RefinedClass.

* vm_insnhelper.c (vm_search_normal_superclass): if klass is an
  iclass for a refinement, use the refinement's superclass instead
  of the iclass's superclass.  Otherwise, multiple refinements are
  searched by super.  For example, if a refinement Refinement2
  includes a module M (i.e., Refinement2 -> <M> -> RefinedClass,
  and if refinements iclasses are <Refinement2> -> <M>' ->
  <Refinement1> -> RefinedClass, then super in <Refinement2> should
  use Refinement2's superclass <M> instead of <Refinement2>'s
  superclass <M>'.

* vm_insnhelper.c (vm_search_super_method): do not raise a
  NotImplementError if current_defind_class is a module included
  into a refinement.  Because of the change of
  vm_search_normal_superclass(), the receiver might not be an
  instance of the module('s iclass).

* test/ruby/test_refinement.rb: related test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38298 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index f25c67aaef..aa0861e92c 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -737,6 +737,7 @@ struct RClass {
 #define RMODULE_SUPER(m) RCLASS_SUPER(m)
 #define RMODULE_IS_OVERLAID FL_USER2
 #define RMODULE_IS_REFINEMENT FL_USER3
+#define RMODULE_INCLUDED_INTO_REFINEMENT FL_USER4
 
 struct RFloat {
     struct RBasic basic;