Icing

Icing is a framework to reify and work with composable decorations.

Add this line to your application's Gemfile:

gem 'icing'

And then execute:

$ bundle

Or install it yourself as:

$ gem install icing

Here is a simple example:

class WithPrefix < Icing::Decorations::Base

  def decorated(object, method_name, *args, &block)
    "Ruby says: #{super}"
  end

end

class WithExclam < Icing::Decorations::Base

  def decorated(object, method_name, *args, &block)
    super + '!'
  end

end

class Greeter

  def say_hello(name)
    "Hello, #{name}"
  end

  def say_welcome(name)
    "Welcome, #{name}"
  end

end

decorated_greeter = Icing.decorator(Greeter.new, {
  say_hello: [WithExclam.new, WithPrefix.new],
  say_welcome: WithExclam.new
})

decorated_greeter.say_hello("Foo")   # "Ruby says: Hello, Foo!"
decorated_greeter.say_welcome("Bar") # "Welcome, Bar!"

More examples can be found in the test files.

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install.

Bug reports and pull requests are welcome on GitHub at https://github.com/eugeniobruno/icing. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.