character_class

in lib/twitter_cldr/parsers/unicode_regex_parser.rb [195:227]

• 26 lines of code
• 6 McCabe index (conditional complexity)

      def character_class
        operator_stack = []
        operand_stack = []
        open_count = 0

        loop do
          case current_token.type
            when *CharacterClass.closing_types
              open_count -= 1
              build_until_open(operator_stack, operand_stack)
              add_implicit_union(operator_stack, open_count)

            when *CharacterClass.opening_types
              open_count += 1
              operator_stack.push(current_token)

            when *(BINARY_OPERATORS + UNARY_OPERATORS)
              operator_stack.push(current_token)

            else
              add_implicit_union(operator_stack, open_count)
              operand_stack.push(
                send(current_token.type, current_token)
              )
          end

          next_token(current_token.type)
          break if operator_stack.empty? && open_count == 0
        end

        CharacterClass.new(operand_stack.pop)
      end