# File lib/treetop/compiler/metagrammar.rb, line 681
      def _nt_include_declaration
        start_index = index
        if node_cache[:include_declaration].has_key?(index)
          cached = node_cache[:include_declaration][index]
          @index = cached.interval.end if cached
          return cached
        end

        i0, s0 = index, []
        if input.index('include', index) == index
          r1 = instantiate_node(SyntaxNode,input, index...(index + 7))
          @index += 7
        else
          terminal_parse_failure('include')
          r1 = nil
        end
        s0 << r1
        if r1
          r2 = _nt_space
          s0 << r2
          if r2
            if input.index(Regexp.new('[A-Z]'), index) == index
              r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              r3 = nil
            end
            s0 << r3
            if r3
              s4, i4 = [], index
              loop do
                i5 = index
                r6 = _nt_alphanumeric_char
                if r6
                  r5 = r6
                else
                  if input.index('::', index) == index
                    r7 = instantiate_node(SyntaxNode,input, index...(index + 2))
                    @index += 2
                  else
                    terminal_parse_failure('::')
                    r7 = nil
                  end
                  if r7
                    r5 = r7
                  else
                    self.index = i5
                    r5 = nil
                  end
                end
                if r5
                  s4 << r5
                else
                  break
                end
              end
              r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
              s0 << r4
            end
          end
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(IncludeDeclaration0)
          r0.extend(IncludeDeclaration1)
        else
          self.index = i0
          r0 = nil
        end

        node_cache[:include_declaration][start_index] = r0

        return r0
      end