# File lib/treetop/compiler/metagrammar.rb, line 305
      def _nt_module_declaration
        start_index = index
        if node_cache[:module_declaration].has_key?(index)
          cached = node_cache[:module_declaration][index]
          if cached
            cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
            @index = cached.interval.end
          end
          return cached
        end

        i0, s0 = index, []
        i1, s1 = index, []
        if has_terminal?('module', false, index)
          r2 = instantiate_node(SyntaxNode,input, index...(index + 6))
          @index += 6
        else
          terminal_parse_failure('module')
          r2 = nil
        end
        s1 << r2
        if r2
          r3 = _nt_space
          s1 << r3
          if r3
            i4, s4 = index, []
            if has_terminal?('\G[A-Z]', true, index)
              r5 = true
              @index += 1
            else
              r5 = nil
            end
            s4 << r5
            if r5
              s6, i6 = [], index
              loop do
                r7 = _nt_alphanumeric_char
                if r7
                  s6 << r7
                else
                  break
                end
              end
              r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
              s4 << r6
              if r6
                s8, i8 = [], index
                loop do
                  i9, s9 = index, []
                  if has_terminal?('::', false, index)
                    r10 = instantiate_node(SyntaxNode,input, index...(index + 2))
                    @index += 2
                  else
                    terminal_parse_failure('::')
                    r10 = nil
                  end
                  s9 << r10
                  if r10
                    if has_terminal?('\G[A-Z]', true, index)
                      r11 = true
                      @index += 1
                    else
                      r11 = nil
                    end
                    s9 << r11
                    if r11
                      s12, i12 = [], index
                      loop do
                        r13 = _nt_alphanumeric_char
                        if r13
                          s12 << r13
                        else
                          break
                        end
                      end
                      r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
                      s9 << r12
                    end
                  end
                  if s9.last
                    r9 = instantiate_node(SyntaxNode,input, i9...index, s9)
                    r9.extend(ModuleDeclaration0)
                  else
                    @index = i9
                    r9 = nil
                  end
                  if r9
                    s8 << r9
                  else
                    break
                  end
                end
                r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
                s4 << r8
              end
            end
            if s4.last
              r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
              r4.extend(ModuleDeclaration1)
            else
              @index = i4
              r4 = nil
            end
            s1 << r4
            if r4
              r14 = _nt_space
              s1 << r14
            end
          end
        end
        if s1.last
          r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
          r1.extend(ModuleDeclaration2)
        else
          @index = i1
          r1 = nil
        end
        s0 << r1
        if r1
          i15 = index
          r16 = _nt_module_declaration
          if r16
            r15 = r16
          else
            r17 = _nt_grammar
            if r17
              r15 = r17
            else
              @index = i15
              r15 = nil
            end
          end
          s0 << r15
          if r15
            i18, s18 = index, []
            r19 = _nt_space
            s18 << r19
            if r19
              if has_terminal?('end', false, index)
                r20 = instantiate_node(SyntaxNode,input, index...(index + 3))
                @index += 3
              else
                terminal_parse_failure('end')
                r20 = nil
              end
              s18 << r20
            end
            if s18.last
              r18 = instantiate_node(SyntaxNode,input, i18...index, s18)
              r18.extend(ModuleDeclaration3)
            else
              @index = i18
              r18 = nil
            end
            s0 << r18
          end
        end
        if s0.last
          r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
          r0.extend(ModuleDeclaration4)
          r0.extend(ModuleDeclaration5)
        else
          @index = i0
          r0 = nil
        end

        node_cache[:module_declaration][start_index] = r0

        r0
      end