comp.lang.ruby

Brian Schröder

10/17/2004 11:03:00 PM

Bob Sidebotham wrote:
> This seems very odd to me:
>
> module A
> module B
> end
> end
>
> module X
> include A
> module Y
> B # => uninitialized constant X::Y::B (NameError
> end
> end
>
> If I move the "include A" either up one line (before "module X"), or
> down one line (after "module Y"), then it works as expected. Since
> include is supposed to import all the constants from one module to the
> other, then surely this should make the constants of A available to
> anything defined within X?
>
> My intent, in doing this, is to include A's semantics only where they
> are relevant...
>
> This may or may not be the way it's supposed to work--but for me, it
> does violate POLS.
>
> Puzzled,
> Bob Sidebotham
>

You can tell ruby to start from the "root"-namespace by prefixing with a
::. See below:

module A
module B
end
end

module X
include A
module Y
::A::B # => uninitialized constant X::Y::B (NameError
end
end

Regards,

Brian
--
Brian Schröder
http://ruby.brian-sch...