From: george.marrows@... (George Marrows)
Date: 2004-04-14T20:04:13+09:00
Subject: Re: Two different results for Module.nesting

Thanks for the very clear demonstration Christoph!

This issue of lexical code nesting vs 'intuitive' class/module nesting
isn't widely documented, but goes further than affecting just
Module.nesting. Its tentacles tickle the corner cases for class
variable and constant lookup, particularly when 'class X::Y' style
declarations are used.


Example for class variables:
http://www.rubygarden.org/ruby?ClassVariables


Example for constants:

E:\>type nesting.rb
class A
	X = 1
	class B
		$b = self
		puts "class A; class B"
		puts X
	end
end

class A::B
	puts "Same class as previously? #{self == $b}"
	puts "class A::B"
	puts X
end

E:\>ruby -v nesting.rb
ruby 1.8.1 (2004-01-27) [i386-mswin32]
class A; class B
1
Same class as previously? true
class A::B
nesting.rb:13: uninitialized constant A::B::X (NameError)


-- George