gistfile1.txt

with(define_macros) {
  if Merb.logger.level == Merb::Logger::DEBUG
    def debug(string)
      Merb.logger.debug "Foo"
    end
  else
    def debug(string) end
  end
}

with(macros) {
  def some_method
    debug("This is whack")
  end
}