[ruby-core:79283] [Ruby trunk Feature#6810] `module A::B; end` is not equivalent to `module A; module B; end; end` with respect to constant lookup (scope)

Issue #6810 has been updated by Michael Hauser-Raspe.


There is another duplicate of this (#11705). I understand this is expected behaviour and it makes sense that this is the way it is with the current architecture.

I don't however think that this is the way it _should_ be. Does anyone else have any opinions on this topic? I think it inhibits the simple code organisation of large projects.

----------------------------------------
Feature #6810: `module A::B; end` is not equivalent to `module A; module B; end; end` with respect to constant lookup (scope)
https://bugs.ruby-lang.org/issues/6810#change-62698

* Author: Alexey Muranov
* Status: Assigned
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Target version: Next Major
----------------------------------------
=begin
Is this the expected behavior?  To me it is rather surprising:

 N = 0

 module A
   module B
     def self.f; N; end
   end
   N = 1
 end

 A::B.f # => 1

but

 N = 0

 module A; end

 module A::B
   def self.f; N; end
 end

 module A
   N = 1
 end

 A::B.f # => 0

Even more striking:

 module A
   module B
     def self.f; N; end
   end
 end

 N = 0

 A::B.f # => 0

 A::N = 1

 puts A::B.f # => 1

 A::B::N = 2

 A::B.f # => 2

but

 module A; end

 module A::B
   def self.f; N; end
 end

 N = 0

 A::B.f # => 0

 A::N = 1

 A::B.f # => 0

 A::B::N = 2

 A::B.f # => 2


=end



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