From: Szymon Drejewicz <drejewic@...>
Date: 2004-02-20T20:20:57+09:00
Subject: Re: how to raise warning?

>   module Kernel
>     alias :oldwarn :warn
>     def warn(msg="", fulltrace=nil)
>       trace = caller(1)
>       where = trace[0].sub(/:in.*/,'')
>       $stderr.puts "#{where}: Warning: #{msg}"
>       $stderr.puts trace.map {|t| "\tfrom #{t}"} if fulltrace
>     end
>   end

Yes, this is exactly what I need :-) thank you
Now it is possible to use just 

warn "Message body"

and ruby adds line number by itself without using redundant syntax like

warn "#{__FILE__}:#{__LINE__}: Message body."

:-)

-- 
Szymon Drejewicz