# File lib/treetop/compiler/node_classes/choice.rb, line 12
      def compile_alternatives(alternatives, parent_expression)
        obtain_new_subexpression_address
        alternatives.first.compile(subexpression_address, builder)
        builder.if__ subexpression_success? do
          # Undo lazy instantiation:
          builder << "#{subexpression_result_var} = SyntaxNode.new(input, (index-1)...index) if #{subexpression_result_var} == true"
          assign_result subexpression_result_var
          extend_result_with_declared_module
          extend_result_with_inline_module parent_expression
        end
        builder.else_ do
          if alternatives.size == 1
            reset_index
            assign_failure start_index_var
          else
            compile_alternatives(alternatives[1..-1], parent_expression)
          end
        end
      end