RubyInterface

Allows you to create abstract classes and interfaces in Ruby.

Installation

Add this line to your application's Gemfile:

gem 'ruby_interface'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby_interface

Usage

Named Classes

class SpaceShip
  include RubyInterface

  defines :engine, :computer
end

class Enterprise < SpaceShip
end
# => NotImplementedError, 'Expected Enterprise to define #engine, #computer'

Anonymous classes

class SpaceShip
  include RubyInterface

  defines :engine, :computer
end

# If the block is passed in to Class::new
space_ship = Class.new(SpaceShip) { }
# => NotImplementedError, 'Expected Enterprise to define #engine, #computer'

# If the block is not passed in to Class::new
space_ship = Class.new(SpaceShip)
space_ship.class_eval { }

# => NotImplementedError, 'Expected Enterprise to define #engine, #computer'
# NOTE: After the first `class_eval`, the rest of the calls to it will not check whether methods are defined.
# NOTE: `class_exec` may also be used instead of `class_eval`

Development

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

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/kklimuk/ruby_interface.

License

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