From: Joel VanderWerf <vjoel@...>
Date: 2008-02-26T07:02:27+09:00
Subject: Re: deprecated

Robert Klemme wrote:
> 
> This just occurred to me (for Java fans):
> 
> class Module
>   def deprecated *meths
>     meths.each do |me|
>       aliased = "_deprecate_#{me}"
>       alias_method aliased, me
>       class_eval "def #{me}(*a,&b) $stderr.puts 'WARNING: deprecated 
> method called: #{me}'; #{aliased}(*a,&b) end"
>     end
>   end
> end

Nice (and I'm not a Java fan). I'd make the output indirect, though, in 
case of GUI etc. Also, you could use this to only warn on the first call 
of each method for a given class.

class Module
   def deprecated *meths
     meths.each do |me|
       aliased = "_deprecate_#{me}"
       alias_method aliased, me
       class_eval %{
         def #{me}(*a,&b)
           warn_deprecated('#{me}')
           #{aliased}(*a,&b)
         end
       }
     end
   end
end

class Object
   def warn_deprecated me
     warn "WARNING: deprecated method called: #{me}"
   end
end

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407