darthjee/danica

# frozen_string_literal: true

module Danica
  class Equation::Builder
    attr_reader :variables

    def initialize(*variables, &block)
      @variables = variables
      instance_eval(&block)
    end

    def build
      vars = variables
      l = left
      r = right

      Class.new(Equation) do
        variables(*vars)

        define_method :left, l
        define_method :right, r
      end
    end

    def left(&block)
      @left = block if block_given?
      @left
    end

    def right(&block)
      @right = block if block_given?
      @right
    end
  end
end