module DebugLogging

#

NOTE: The manner this is made to work for class methods is totally different

than the way this is made to work for instance methods.

NOTE: The instance method manner works on Ruby 2.0+ NOTE: The class method manner works on Ruby 2.1+

#

#

USAGE (see specs)#

             #
class Car

  # adds the helper methods to the class, all are prefixed with debug_*,
  #   except for the logged class method, which comes from extending DebugLogging::ClassLogger
  extend DebugLogging

  # per class configuration overrides!
  self.debug_class_benchmarks = true
  self.debug_instance_benchmarks = true

  # For instance methods:
  # Option 1: specify the exact method(s) to add logging to
  include DebugLogging::InstanceLogger.new(i_methods: [:drive, :stop])

  # Provides the `logged` method decorator
  extend DebugLogging::ClassLogger

  logged def debug_make; new; end
  def design(*args); new; end
  def safety(*args); new; end
  logged :design, :safety

  def drive(speed); speed; end
  def stop; 0; end

  # For instance methods:
  # Option 2: add logging to all instance methods defined above (but *not* defined below)
  include DebugLogging::InstanceLogger.new(i_methods: self.instance_methods(false))

  def will_not_be_logged; false; end

end
             #

From: stackoverflow.com/a/34559282 License: creativecommons.org/licenses/by-sa/4.0/