[ruby-core:89663] [Ruby trunk Bug#15274] Reflection does not report methods defined only in refinements

Issue #15274 has been reported by pitr.ch (Petr Chalupa).

----------------------------------------
Bug #15274: Reflection does not report methods defined only in refinements
https://bugs.ruby-lang.org/issues/15274

* Author: pitr.ch (Petr Chalupa)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
~~~ ruby
class C
end

module M
  refine C do
    def foo
      puts "C#foo in M"
    end
  end
end

using M

c = C.new
c.foo # prints "C#foo in M"
c.send :foo
p c.respond_to? :foo
p c.methods.include?(:foo)
p C.instance_methods.include?(:foo)
p((c.method(:foo) rescue false))

__END__
Prints:

C#foo in M
C#foo in M
false
false
false
false
~~~

When the refinement M is used I think it would be less surprising if reflection methods (respond_to?, methods, method, instance_methods) report available methods including the ones coming from refinement.



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