From: Lothar Scholz <mailinglists@...>
Date: 2005-05-17T00:38:50+09:00
Subject: Re: Problems with the "outer scope" operator

Hello Martin,

MH> not sure if I entirely understand what you mean, but consider this:

MH> class Outer
MH> end

MH> class Inner
MH>   class Outer
MH>   end

MH>   class Child1 < Outer
MH>   end

MH>   class Child2 < ::Outer
MH>   end
MH> end

MH> Without the leading '::', Child2 would derive from Inner::Outer and not ::Outer.

Okay thats a good example that i understand.
But why does somebody write

module SOAP
module RPC
class SOAPlet
class RequestRouter < ::SOAP::RPC::Router
end
end
end
end

As soon as "::" is found inside the superclass doesn't this
automatically mean we start the lookup inside the toplevel scope ?

Or would a "class RequestRouter < SOAP::RPC::Router" declaration really
look for the following classes and and takes the first it finds in
this order:

SAOP::RPC::SOAPlet::SOAP::RPC::Router
SAOP::RPC::SOAP::RPC::Router
SAOP::SOAP::RPC::Router
SOAP::RPC::Router

And this raises one more question for me. Is there any differences in
the lookup mechanism between nesting inside a module or a class ?

Sorry for the line noise, i posted this by accident to the core
mailing list and not to the ruby-user list. And i hope someday we have a
written (english !) formal language definition where i can find all
the answers.


-- 
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 Lothar Scholz                        http://www.ruby-ide.com
 CTO Scriptolutions                   Ruby, PHP, Python IDE 's