A similar issue was raised in . We discussed that issue at the last dev meeting, and several endless class definition syntax was proposed.

module = Foo

in module Foo

for module Foo

However, @matz (Yukihiro Matsumoto) didn't like any of them. Also, he said that this issue was inevitable in object-oriented programming, and that he would close (which doesn't seem to be closed yet).

So perhaps this proposal is also hopeless. (Personally, I would like to solve this problem, though.)