slowlogger.rb

class SlowLogger
  future :log, message: String, delay: default(10, Fixnum) do
    sleep delay
    puts "It took me #{delay}s to say: #{message}"
   end
end

terminal.log

[17:36:11] tyler:typedeaf git:(master*) $ pry -I lib -r 'typedeaf'
[1] pry(main)> Typedeaf.global_install
=> nil
[2] pry(main)> class SlowLogger
[2] pry(main)*   future :log, message: String, delay: default(10, Fixnum) do
[2] pry(main)*     sleep delay
[2] pry(main)*     puts "It took me #{delay}s to say: #{message}"
[2] pry(main)*   end  
[2] pry(main)* end  
=> SlowLogger
[3] pry(main)> slow = SlowLogger.new
=> #<SlowLogger:0x000008043fa078>
[4] pry(main)> slow.log("hello world") ; nil # avoid pry printing Concurrent::Future
=> nil
[5] pry(main)> It took me 10s to say: hello world
[5] pry(main)> 
[6] pry(main)>