Ruby » Ruby master

enumerator.c: lazy enum improvement

• enumerator.c (lazy_init_yielder): directly call stored functions.
  [Feature #6183]
• enumerator.c (lazy_add_method): create lazy enumerator which
  uses lazy_init_yielder().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56185 b2dd03c8-39d4-4d8f-98ff-823fe69b080e