# File lib/treetop/compiler/metagrammar.rb, line 133
      def _nt_require_statement
        start_index = index
        if node_cache[:require_statement].has_key?(index)
          cached = node_cache[:require_statement][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        r2 = _nt_space
        if r2
          r1 = r2
        else
          r1 = instantiate_node(SyntaxNode,input, index...index)
        end
        s0 << r1
        if r1
          if input.index("require", index) == index
            r3 = instantiate_node(SyntaxNode,input, index...(index + 7))
            @index += 7
          else
            terminal_parse_failure("require")
            r3 = nil
          end
          s0 << r3
          if r3
            s4, i4 = [], index
            loop do
              if input.index(Regexp.new('[ \\t]'), index) == index
                r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
                @index += 1
              else
                r5 = nil
              end
              if r5
                s4 << r5
              else
                break
              end
            end
            if s4.empty?
              self.index = i4
              r4 = nil
            else
              r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
            end
            s0 << r4
            if r4
              s6, i6 = [], index
              loop do
                if input.index(Regexp.new('[^\\n\\r]'), index) == index
                  r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
                  @index += 1
                else
                  r7 = nil
                end
                if r7
                  s6 << r7
                else
                  break
                end
              end
              if s6.empty?
                self.index = i6
                r6 = nil
              else
                r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
              end
              s0 << r6
              if r6
                if input.index(Regexp.new('[\\n\\r]'), index) == index
                  r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
                  @index += 1
                else
                  r8 = nil
                end
                s0 << r8
              end
            end
          end
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(RequireStatement0)
        else
          self.index = i0
          r0 = nil
        end

        node_cache[:require_statement][start_index] = r0

        return r0
      end