From: Brian Candler <b.candler@...>
Date: 2010-01-27T16:48:06+09:00
Subject: Re: require files namespace!

Roger Pack wrote:
> What's the full backtrace? (chances are you have a stray "tool" in there 
> somewhere)

Yes, it's saying that you're using "tool" (lower-case t) by itself.

If I take just the code you posted, then it works fine for me under 
ruby-1.8.7 and Ubuntu Karmic:

$ ls -lR
.:
total 4
drwxr-xr-x 3 brian brian 4096 2010-01-27 07:45 lib

./lib:
total 8
drwxr-xr-x 2 brian brian 4096 2010-01-27 07:45 tool
-rw-r--r-- 1 brian brian   68 2010-01-27 07:44 tool.rb

./lib/tool:
total 8
-rw-r--r-- 1 brian brian 25 2010-01-27 07:44 sentence.rb
-rw-r--r-- 1 brian brian 21 2010-01-27 07:44 word.rb

$ head $(find . -type f)
==> ./lib/tool/word.rb <==
class Tool::Word
end

==> ./lib/tool/sentence.rb <==
class Tool::Sentence
end

==> ./lib/tool.rb <==
module Tool

require 'tool/word.rb'
require 'tool/sentence.rb'

end

$ irb -Ilib --simple-prompt
>> require 'tool.rb'
=> true
>> 

(However, note that it is preferred if you require 'tool' rather than 
require 'tool.rb')
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