contract.cr

macro finished
  {% for definition in Crystal::Clear::CLASS_COMPILE_DATA %}
    class {{definition[0]}}
      Crystal::Clear::CLASS_RUNTIME_DATA << Crystal::Clear::ClassData({{definition[0]}}).new()
      def {{definition[1]}}
        {% for condition in definition[2] %}
          if(({{condition}}) == false)
            raise Crystal::Clear::Exception.new("Failed {{definition[0]}} require contract: {{condition}}")
          end
        {% end %}
        previous_def
        {% for condition in definition[3] %}
          if(({{condition}}) == false)
            raise Crystal::Clear::Exception.new("Failed {{definition[0]}} ensure contract: {{condition}}")
          end
        {% end %}
      end
    end
  {% end %}
end

puts Crystal::Clear::CLASS_RUNTIME_DATA