From: Brian Candler <B.Candler@...>
Date: 2003-03-26T20:25:11+09:00
Subject: Re: how to raise warning?

On Wed, Mar 26, 2003 at 06:47:00PM +0900, Szymon Drejewicz wrote:
> how to raise warning? I would like to show up warning as below
> 
> warning: ClassName.methodName(): warning message

Not a direct answer, but you can test $VERBOSE (or $-v or $-w) to see if
Ruby was started with the -w flag:

def warning(*args)
  $stderr.puts(args.join(': ')) if $VERBOSE
end