gem 'test-unit', '>= 0', group: %i(development)
gem 'rspec', '>= 0', group: %i(development)
gem 'rake', '>= 0', group: %i(development)
gem 'rdoc', '>= 0', group: %i(development)
gem 'simplecov', '>= 0', group: %i(development)
gem 'expression_parser', '~> 0.9.1'
