Module: DNS::Zonefile::ZonefileGrammar

Includes:
Treetop::Runtime
Included in:
Parser
Defined in:
lib/dns/zonefile/parser.rb

Overview

:nodoc:

Defined Under Namespace

Modules: ARecord0, ARecord1, AaaaRecord0, AaaaRecord1, CnameRecord0, CnameRecord1, Comment0, Comment1, Data0, Expiry0, Expiry1, Host0, Integer0, Ip6Address0, IpAddress0, IpAddress1, Klass0, Klass1, Linebreak0, MxRecord0, MxRecord1, NaptrRecord0, NaptrRecord1, Ns0, Ns1, NsRecord0, NsRecord1, Nxttl0, Nxttl1, Origin0, Origin1, PtrRecord0, PtrRecord1, Refresh0, Refresh1, Reretry0, Reretry1, ResourceRecord0, ResourceRecord1, Rp0, Rp1, Serial0, Serial1, Soa0, Soa1, SoaRecord0, SoaRecord1, Space0, SpaceOrBreak0, SpfRecord0, SpfRecord1, SrvRecord0, SrvRecord1, TimeInterval0, TimeInterval1, TimeMultiplier0, Ttl0, Ttl1, TxtData0, TxtData1, TxtData2, TxtData3, TxtData4, TxtRecord0, TxtRecord1, Variable0, Variable1, Zone0, Zone1

Instance Method Summary collapse

Instance Method Details

#_nt_a_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 708

def _nt_a_record
  start_index = index
  if node_cache[:a_record].has_key?(index)
    cached = node_cache[:a_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("A", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
            @index += 1
          else
            terminal_parse_failure("A")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_ip_address
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ARecord0)
    r0.extend(ARecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:a_record][start_index] = r0

  r0
end

#_nt_aaaa_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 953

def _nt_aaaa_record
  start_index = index
  if node_cache[:aaaa_record].has_key?(index)
    cached = node_cache[:aaaa_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("AAAA", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 4))
            @index += 4
          else
            terminal_parse_failure("AAAA")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_ip6_address
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(AaaaRecord0)
    r0.extend(AaaaRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:aaaa_record][start_index] = r0

  r0
end

#_nt_cname_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1090

def _nt_cname_record
  start_index = index
  if node_cache[:cname_record].has_key?(index)
    cached = node_cache[:cname_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("CNAME", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 5))
            @index += 5
          else
            terminal_parse_failure("CNAME")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_host
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(CnameRecord0)
    r0.extend(CnameRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:cname_record][start_index] = r0

  r0
end

#_nt_comment ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2228

def _nt_comment
  start_index = index
  if node_cache[:comment].has_key?(index)
    cached = node_cache[:comment][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    r2 = _nt_space
    if r2
      s1 << r2
    else
      break
    end
  end
  r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  s0 << r1
  if r1
    if has_terminal?(";", false, index)
      r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
      @index += 1
    else
      terminal_parse_failure(";")
      r3 = nil
    end
    s0 << r3
    if r3
      s4, i4 = [], index
      loop do
        if has_terminal?('\G[^\\n\\r]', true, index)
          r5 = true
          @index += 1
        else
          r5 = nil
        end
        if r5
          s4 << r5
        else
          break
        end
      end
      r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Comment0)
    r0.extend(Comment1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:comment][start_index] = r0

  r0
end

#_nt_data ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 3167

def _nt_data
  start_index = index
  if node_cache[:data].has_key?(index)
    cached = node_cache[:data][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[^;\\n\\r]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Data0)
  end

  node_cache[:data][start_index] = r0

  r0
end

#_nt_expiry ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2899

def _nt_expiry
  start_index = index
  if node_cache[:expiry].has_key?(index)
    cached = node_cache[:expiry][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_time_interval
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Expiry0)
    r0.extend(Expiry1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:expiry][start_index] = r0

  r0
end

#_nt_host ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 3080

def _nt_host
  start_index = index
  if node_cache[:host].has_key?(index)
    cached = node_cache[:host][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  s1, i1 = [], index
  loop do
    if has_terminal?('\G[*a-zA-Z0-9\\-\\._]', true, index)
      r2 = true
      @index += 1
    else
      r2 = nil
    end
    if r2
      s1 << r2
    else
      break
    end
  end
  if s1.empty?
    @index = i1
    r1 = nil
  else
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  end
  if r1
    r0 = r1
    r0.extend(Host0)
  else
    if has_terminal?("@", false, index)
      r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
      @index += 1
    else
      terminal_parse_failure("@")
      r3 = nil
    end
    if r3
      r0 = r3
      r0.extend(Host0)
    else
      if has_terminal?(' ', false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(' ')
        r4 = nil
      end
      if r4
        r0 = r4
        r0.extend(Host0)
      else
        if has_terminal?("\t", false, index)
          r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure("\t")
          r5 = nil
        end
        if r5
          r0 = r5
          r0.extend(Host0)
        else
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:host][start_index] = r0

  r0
end

#_nt_integer ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2620

def _nt_integer
  start_index = index
  if node_cache[:integer].has_key?(index)
    cached = node_cache[:integer][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[0-9]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Integer0)
  end

  node_cache[:integer][start_index] = r0

  r0
end

#_nt_ip6_address ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1017

def _nt_ip6_address
  start_index = index
  if node_cache[:ip6_address].has_key?(index)
    cached = node_cache[:ip6_address][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[\\da-fA-F:.]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
    if s0.size == 39
      break
    end
  end
  if s0.size < 2
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Ip6Address0)
  end

  node_cache[:ip6_address][start_index] = r0

  r0
end

#_nt_ip_address ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 775

def _nt_ip_address
  start_index = index
  if node_cache[:ip_address].has_key?(index)
    cached = node_cache[:ip_address][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    if has_terminal?('\G[\\d]', true, index)
      r2 = true
      @index += 1
    else
      r2 = nil
    end
    if r2
      s1 << r2
    else
      break
    end
  end
  if s1.empty?
    @index = i1
    r1 = nil
  else
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  end
  s0 << r1
  if r1
    if has_terminal?(".", false, index)
      r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
      @index += 1
    else
      terminal_parse_failure(".")
      r3 = nil
    end
    s0 << r3
    if r3
      s4, i4 = [], index
      loop do
        if has_terminal?('\G[\\d]', true, index)
          r5 = true
          @index += 1
        else
          r5 = nil
        end
        if r5
          s4 << r5
        else
          break
        end
      end
      if s4.empty?
        @index = i4
        r4 = nil
      else
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      end
      s0 << r4
      if r4
        if has_terminal?(".", false, index)
          r6 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure(".")
          r6 = nil
        end
        s0 << r6
        if r6
          s7, i7 = [], index
          loop do
            if has_terminal?('\G[\\d]', true, index)
              r8 = true
              @index += 1
            else
              r8 = nil
            end
            if r8
              s7 << r8
            else
              break
            end
          end
          if s7.empty?
            @index = i7
            r7 = nil
          else
            r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
          end
          s0 << r7
          if r7
            if has_terminal?(".", false, index)
              r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure(".")
              r9 = nil
            end
            s0 << r9
            if r9
              s10, i10 = [], index
              loop do
                if has_terminal?('\G[\\d]', true, index)
                  r11 = true
                  @index += 1
                else
                  r11 = nil
                end
                if r11
                  s10 << r11
                else
                  break
                end
              end
              if s10.empty?
                @index = i10
                r10 = nil
              else
                r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
              end
              s0 << r10
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(IpAddress0)
    r0.extend(IpAddress1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:ip_address][start_index] = r0

  r0
end

#_nt_klass ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2162

def _nt_klass
  start_index = index
  if node_cache[:klass].has_key?(index)
    cached = node_cache[:klass][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  i1, s1 = index, []
  if has_terminal?("IN", false, index)
    r2 = instantiate_node(SyntaxNode,input, index...(index + 2))
    @index += 2
  else
    terminal_parse_failure("IN")
    r2 = nil
  end
  s1 << r2
  if r2
    r3 = _nt_space
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Klass0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r0 = r1
    r0.extend(Klass1)
  else
    if has_terminal?('', false, index)
      r4 = instantiate_node(SyntaxNode,input, index...(index + 0))
      @index += 0
    else
      terminal_parse_failure('')
      r4 = nil
    end
    if r4
      r0 = r4
      r0.extend(Klass1)
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:klass][start_index] = r0

  r0
end

#_nt_linebreak ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2068

def _nt_linebreak
  start_index = index
  if node_cache[:linebreak].has_key?(index)
    cached = node_cache[:linebreak][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[\\n\\r]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Linebreak0)
  end

  node_cache[:linebreak][start_index] = r0

  r0
end

#_nt_mx_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1188

def _nt_mx_record
  start_index = index
  if node_cache[:mx_record].has_key?(index)
    cached = node_cache[:mx_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("MX", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 2))
            @index += 2
          else
            terminal_parse_failure("MX")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_integer
              s0 << r7
              if r7
                r8 = _nt_space
                s0 << r8
                if r8
                  r9 = _nt_host
                  s0 << r9
                end
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(MxRecord0)
    r0.extend(MxRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:mx_record][start_index] = r0

  r0
end

#_nt_naptr_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1286

def _nt_naptr_record
  start_index = index
  if node_cache[:naptr_record].has_key?(index)
    cached = node_cache[:naptr_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("NAPTR", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 5))
            @index += 5
          else
            terminal_parse_failure("NAPTR")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_data
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(NaptrRecord0)
    r0.extend(NaptrRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:naptr_record][start_index] = r0

  r0
end

#_nt_ns ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2306

def _nt_ns
  start_index = index
  if node_cache[:ns].has_key?(index)
    cached = node_cache[:ns][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Ns0)
    r0.extend(Ns1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:ns][start_index] = r0

  r0
end

#_nt_ns_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1376

def _nt_ns_record
  start_index = index
  if node_cache[:ns_record].has_key?(index)
    cached = node_cache[:ns_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("NS", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 2))
            @index += 2
          else
            terminal_parse_failure("NS")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_host
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(NsRecord0)
    r0.extend(NsRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:ns_record][start_index] = r0

  r0
end

#_nt_nxttl ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2956

def _nt_nxttl
  start_index = index
  if node_cache[:nxttl].has_key?(index)
    cached = node_cache[:nxttl][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_time_interval
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Nxttl0)
    r0.extend(Nxttl1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:nxttl][start_index] = r0

  r0
end

#_nt_origin ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1977

def _nt_origin
  start_index = index
  if node_cache[:origin].has_key?(index)
    cached = node_cache[:origin][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Origin0)
    r0.extend(Origin1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:origin][start_index] = r0

  r0
end

#_nt_ptr_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1466

def _nt_ptr_record
  start_index = index
  if node_cache[:ptr_record].has_key?(index)
    cached = node_cache[:ptr_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("PTR", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("PTR")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_host
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(PtrRecord0)
    r0.extend(PtrRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:ptr_record][start_index] = r0

  r0
end

#_nt_refresh ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2570

def _nt_refresh
  start_index = index
  if node_cache[:refresh].has_key?(index)
    cached = node_cache[:refresh][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_time_interval
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Refresh0)
    r0.extend(Refresh1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:refresh][start_index] = r0

  r0
end

#_nt_reretry ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2842

def _nt_reretry
  start_index = index
  if node_cache[:reretry].has_key?(index)
    cached = node_cache[:reretry][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_time_interval
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Reretry0)
    r0.extend(Reretry1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:reretry][start_index] = r0

  r0
end

#_nt_resource_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 565

def _nt_resource_record
  start_index = index
  if node_cache[:resource_record].has_key?(index)
    cached = node_cache[:resource_record][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 = index
  r2 = _nt_a_record
  if r2
    r1 = r2
  else
    r3 = _nt_aaaa_record
    if r3
      r1 = r3
    else
      r4 = _nt_cname_record
      if r4
        r1 = r4
      else
        r5 = _nt_mx_record
        if r5
          r1 = r5
        else
          r6 = _nt_naptr_record
          if r6
            r1 = r6
          else
            r7 = _nt_ns_record
            if r7
              r1 = r7
            else
              r8 = _nt_ptr_record
              if r8
                r1 = r8
              else
                r9 = _nt_srv_record
                if r9
                  r1 = r9
                else
                  r10 = _nt_spf_record
                  if r10
                    r1 = r10
                  else
                    r11 = _nt_txt_record
                    if r11
                      r1 = r11
                    else
                      r12 = _nt_soa_record
                      if r12
                        r1 = r12
                      else
                        @index = i1
                        r1 = nil
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end
  s0 << r1
  if r1
    s13, i13 = [], index
    loop do
      r14 = _nt_space
      if r14
        s13 << r14
      else
        break
      end
    end
    r13 = instantiate_node(SyntaxNode,input, i13...index, s13)
    s0 << r13
    if r13
      r16 = _nt_comment
      if r16
        r15 = r16
      else
        r15 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r15
      if r15
        r17 = _nt_linebreak
        s0 << r17
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ResourceRecord0)
    r0.extend(ResourceRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:resource_record][start_index] = r0

  r0
end

#_nt_rp ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2356

def _nt_rp
  start_index = index
  if node_cache[:rp].has_key?(index)
    cached = node_cache[:rp][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    i1, s1 = index, []
    s2, i2 = [], index
    loop do
      i3 = index
      if has_terminal?("\\.", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 2))
        @index += 2
      else
        terminal_parse_failure("\\.")
        r4 = nil
      end
      if r4
        r3 = r4
      else
        if has_terminal?('\G[a-zA-Z0-9\\-)]', true, index)
          r5 = true
          @index += 1
        else
          r5 = nil
        end
        if r5
          r3 = r5
        else
          @index = i3
          r3 = nil
        end
      end
      if r3
        s2 << r3
      else
        break
      end
    end
    if s2.empty?
      @index = i2
      r2 = nil
    else
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    end
    s1 << r2
    if r2
      if has_terminal?(".", false, index)
        r6 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(".")
        r6 = nil
      end
      s1 << r6
    end
    if s1.last
      r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
      r1.extend(Rp0)
    else
      @index = i1
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Rp1)
  end

  node_cache[:rp][start_index] = r0

  r0
end

#_nt_serial ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2461

def _nt_serial
  start_index = index
  if node_cache[:serial].has_key?(index)
    cached = node_cache[:serial][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_integer
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_comment
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Serial0)
    r0.extend(Serial1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:serial][start_index] = r0

  r0
end

#_nt_soa ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 359

def _nt_soa
  start_index = index
  if node_cache[:soa].has_key?(index)
    cached = node_cache[:soa][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_origin
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("SOA", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("SOA")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_ns
              s0 << r7
              if r7
                r8 = _nt_space
                s0 << r8
                if r8
                  r9 = _nt_rp
                  s0 << r9
                  if r9
                    r10 = _nt_space
                    s0 << r10
                    if r10
                      if has_terminal?("(", false, index)
                        r12 = instantiate_node(SyntaxNode,input, index...(index + 1))
                        @index += 1
                      else
                        terminal_parse_failure("(")
                        r12 = nil
                      end
                      if r12
                        r11 = r12
                      else
                        r11 = instantiate_node(SyntaxNode,input, index...index)
                      end
                      s0 << r11
                      if r11
                        s13, i13 = [], index
                        loop do
                          r14 = _nt_space_or_break
                          if r14
                            s13 << r14
                          else
                            break
                          end
                        end
                        r13 = instantiate_node(SyntaxNode,input, i13...index, s13)
                        s0 << r13
                        if r13
                          r15 = _nt_serial
                          s0 << r15
                          if r15
                            r16 = _nt_space_or_break
                            s0 << r16
                            if r16
                              r17 = _nt_refresh
                              s0 << r17
                              if r17
                                r18 = _nt_space_or_break
                                s0 << r18
                                if r18
                                  r19 = _nt_reretry
                                  s0 << r19
                                  if r19
                                    r20 = _nt_space_or_break
                                    s0 << r20
                                    if r20
                                      r21 = _nt_expiry
                                      s0 << r21
                                      if r21
                                        r22 = _nt_space_or_break
                                        s0 << r22
                                        if r22
                                          r23 = _nt_nxttl
                                          s0 << r23
                                          if r23
                                            s24, i24 = [], index
                                            loop do
                                              r25 = _nt_space_or_break
                                              if r25
                                                s24 << r25
                                              else
                                                break
                                              end
                                            end
                                            r24 = instantiate_node(SyntaxNode,input, i24...index, s24)
                                            s0 << r24
                                            if r24
                                              if has_terminal?(")", false, index)
                                                r27 = instantiate_node(SyntaxNode,input, index...(index + 1))
                                                @index += 1
                                              else
                                                terminal_parse_failure(")")
                                                r27 = nil
                                              end
                                              if r27
                                                r26 = r27
                                              else
                                                r26 = instantiate_node(SyntaxNode,input, index...index)
                                              end
                                              s0 << r26
                                            end
                                          end
                                        end
                                      end
                                    end
                                  end
                                end
                              end
                            end
                          end
                        end
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Soa0)
    r0.extend(Soa1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:soa][start_index] = r0

  r0
end

#_nt_soa_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1572

def _nt_soa_record
  start_index = index
  if node_cache[:soa_record].has_key?(index)
    cached = node_cache[:soa_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_origin
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("SOA", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("SOA")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_ns
              s0 << r7
              if r7
                r8 = _nt_space
                s0 << r8
                if r8
                  r9 = _nt_rp
                  s0 << r9
                  if r9
                    r10 = _nt_space
                    s0 << r10
                    if r10
                      r11 = _nt_data
                      s0 << r11
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(SoaRecord0)
    r0.extend(SoaRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:soa_record][start_index] = r0

  r0
end

#_nt_space ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2024

def _nt_space
  start_index = index
  if node_cache[:space].has_key?(index)
    cached = node_cache[:space][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[ \\t]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Space0)
  end

  node_cache[:space][start_index] = r0

  r0
end

#_nt_space_or_break ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2112

def _nt_space_or_break
  start_index = index
  if node_cache[:space_or_break].has_key?(index)
    cached = node_cache[:space_or_break][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  s0, i0 = [], index
  loop do
    if has_terminal?('\G[\\s]', true, index)
      r1 = true
      @index += 1
    else
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.empty?
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(SpaceOrBreak0)
  end

  node_cache[:space_or_break][start_index] = r0

  r0
end

#_nt_spf_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1816

def _nt_spf_record
  start_index = index
  if node_cache[:spf_record].has_key?(index)
    cached = node_cache[:spf_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("SPF", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("SPF")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_txt_data
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(SpfRecord0)
    r0.extend(SpfRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:spf_record][start_index] = r0

  r0
end

#_nt_srv_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1702

def _nt_srv_record
  start_index = index
  if node_cache[:srv_record].has_key?(index)
    cached = node_cache[:srv_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("SRV", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("SRV")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_integer
              s0 << r7
              if r7
                r8 = _nt_space
                s0 << r8
                if r8
                  r9 = _nt_integer
                  s0 << r9
                  if r9
                    r10 = _nt_space
                    s0 << r10
                    if r10
                      r11 = _nt_integer
                      s0 << r11
                      if r11
                        r12 = _nt_space
                        s0 << r12
                        if r12
                          r13 = _nt_host
                          s0 << r13
                        end
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(SrvRecord0)
    r0.extend(SrvRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:srv_record][start_index] = r0

  r0
end

#_nt_time_interval ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2522

def _nt_time_interval
  start_index = index
  if node_cache[:time_interval].has_key?(index)
    cached = node_cache[:time_interval][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_integer
  s0 << r1
  if r1
    r2 = _nt_time_multiplier
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(TimeInterval0)
    r0.extend(TimeInterval1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:time_interval][start_index] = r0

  r0
end

#_nt_time_multiplier ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 2674

def _nt_time_multiplier
  start_index = index
  if node_cache[:time_multiplier].has_key?(index)
    cached = node_cache[:time_multiplier][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if has_terminal?('s', false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('s')
    r1 = nil
  end
  if r1
    r0 = r1
    r0.extend(TimeMultiplier0)
  else
    if has_terminal?('S', false, index)
      r2 = instantiate_node(SyntaxNode,input, index...(index + 1))
      @index += 1
    else
      terminal_parse_failure('S')
      r2 = nil
    end
    if r2
      r0 = r2
      r0.extend(TimeMultiplier0)
    else
      if has_terminal?('m', false, index)
        r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure('m')
        r3 = nil
      end
      if r3
        r0 = r3
        r0.extend(TimeMultiplier0)
      else
        if has_terminal?('M', false, index)
          r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure('M')
          r4 = nil
        end
        if r4
          r0 = r4
          r0.extend(TimeMultiplier0)
        else
          if has_terminal?('h', false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 1))
            @index += 1
          else
            terminal_parse_failure('h')
            r5 = nil
          end
          if r5
            r0 = r5
            r0.extend(TimeMultiplier0)
          else
            if has_terminal?('H', false, index)
              r6 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure('H')
              r6 = nil
            end
            if r6
              r0 = r6
              r0.extend(TimeMultiplier0)
            else
              if has_terminal?('d', false, index)
                r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
                @index += 1
              else
                terminal_parse_failure('d')
                r7 = nil
              end
              if r7
                r0 = r7
                r0.extend(TimeMultiplier0)
              else
                if has_terminal?('D', false, index)
                  r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
                  @index += 1
                else
                  terminal_parse_failure('D')
                  r8 = nil
                end
                if r8
                  r0 = r8
                  r0.extend(TimeMultiplier0)
                else
                  if has_terminal?('w', false, index)
                    r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
                    @index += 1
                  else
                    terminal_parse_failure('w')
                    r9 = nil
                  end
                  if r9
                    r0 = r9
                    r0.extend(TimeMultiplier0)
                  else
                    if has_terminal?('W', false, index)
                      r10 = instantiate_node(SyntaxNode,input, index...(index + 1))
                      @index += 1
                    else
                      terminal_parse_failure('W')
                      r10 = nil
                    end
                    if r10
                      r0 = r10
                      r0.extend(TimeMultiplier0)
                    else
                      if has_terminal?('', false, index)
                        r11 = instantiate_node(SyntaxNode,input, index...(index + 0))
                        @index += 0
                      else
                        terminal_parse_failure('')
                        r11 = nil
                      end
                      if r11
                        r0 = r11
                        r0.extend(TimeMultiplier0)
                      else
                        @index = i0
                        r0 = nil
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end

  node_cache[:time_multiplier][start_index] = r0

  r0
end

#_nt_ttl ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 3016

def _nt_ttl
  start_index = index
  if node_cache[:ttl].has_key?(index)
    cached = node_cache[:ttl][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  i1, s1 = index, []
  r2 = _nt_time_interval
  s1 << r2
  if r2
    r3 = _nt_space
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Ttl0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r0 = r1
    r0.extend(Ttl1)
  else
    if has_terminal?('', false, index)
      r4 = instantiate_node(SyntaxNode,input, index...(index + 0))
      @index += 0
    else
      terminal_parse_failure('')
      r4 = nil
    end
    if r4
      r0 = r4
      r0.extend(Ttl1)
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:ttl][start_index] = r0

  r0
end

#_nt_txt_data ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 3227

def _nt_txt_data
  start_index = index
  if node_cache[:txt_data].has_key?(index)
    cached = node_cache[:txt_data][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if has_terminal?('"', false, index)
    r2 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('"')
    r2 = nil
  end
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    s3, i3 = [], index
    loop do
      i4 = index
      if has_terminal?('\\"', false, index)
        r5 = instantiate_node(SyntaxNode,input, index...(index + 2))
        @index += 2
      else
        terminal_parse_failure('\\"')
        r5 = nil
      end
      if r5
        r4 = r5
      else
        i6, s6 = index, []
        i7 = index
        if has_terminal?('"', false, index)
          r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure('"')
          r8 = nil
        end
        if r8
          r7 = nil
        else
          @index = i7
          r7 = instantiate_node(SyntaxNode,input, index...index)
        end
        s6 << r7
        if r7
          if has_terminal?('\G[^\\n\\r]', true, index)
            r9 = true
            @index += 1
          else
            r9 = nil
          end
          s6 << r9
        end
        if s6.last
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          r6.extend(TxtData0)
        else
          @index = i6
          r6 = nil
        end
        if r6
          r4 = r6
        else
          @index = i4
          r4 = nil
        end
      end
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s0 << r3
    if r3
      if has_terminal?('"', false, index)
        r11 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure('"')
        r11 = nil
      end
      if r11
        r10 = r11
      else
        r10 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r10
      if r10
        s12, i12 = [], index
        loop do
          i13, s13 = index, []
          r14 = _nt_space
          s13 << r14
          if r14
            if has_terminal?('"', false, index)
              r15 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure('"')
              r15 = nil
            end
            s13 << r15
            if r15
              s16, i16 = [], index
              loop do
                i17 = index
                if has_terminal?('\\"', false, index)
                  r18 = instantiate_node(SyntaxNode,input, index...(index + 2))
                  @index += 2
                else
                  terminal_parse_failure('\\"')
                  r18 = nil
                end
                if r18
                  r17 = r18
                else
                  i19, s19 = index, []
                  i20 = index
                  if has_terminal?('"', false, index)
                    r21 = instantiate_node(SyntaxNode,input, index...(index + 1))
                    @index += 1
                  else
                    terminal_parse_failure('"')
                    r21 = nil
                  end
                  if r21
                    r20 = nil
                  else
                    @index = i20
                    r20 = instantiate_node(SyntaxNode,input, index...index)
                  end
                  s19 << r20
                  if r20
                    if has_terminal?('\G[^\\n\\r]', true, index)
                      r22 = true
                      @index += 1
                    else
                      r22 = nil
                    end
                    s19 << r22
                  end
                  if s19.last
                    r19 = instantiate_node(SyntaxNode,input, i19...index, s19)
                    r19.extend(TxtData1)
                  else
                    @index = i19
                    r19 = nil
                  end
                  if r19
                    r17 = r19
                  else
                    @index = i17
                    r17 = nil
                  end
                end
                if r17
                  s16 << r17
                else
                  break
                end
              end
              r16 = instantiate_node(SyntaxNode,input, i16...index, s16)
              s13 << r16
              if r16
                if has_terminal?('"', false, index)
                  r23 = instantiate_node(SyntaxNode,input, index...(index + 1))
                  @index += 1
                else
                  terminal_parse_failure('"')
                  r23 = nil
                end
                s13 << r23
              end
            end
          end
          if s13.last
            r13 = instantiate_node(SyntaxNode,input, i13...index, s13)
            r13.extend(TxtData2)
          else
            @index = i13
            r13 = nil
          end
          if r13
            s12 << r13
          else
            break
          end
        end
        r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
        s0 << r12
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(TxtData3)
    r0.extend(TxtData4)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:txt_data][start_index] = r0

  r0
end

#_nt_txt_record ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 1906

def _nt_txt_record
  start_index = index
  if node_cache[:txt_record].has_key?(index)
    cached = node_cache[:txt_record][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_host
  s0 << r1
  if r1
    r2 = _nt_space
    s0 << r2
    if r2
      r3 = _nt_ttl
      s0 << r3
      if r3
        r4 = _nt_klass
        s0 << r4
        if r4
          if has_terminal?("TXT", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("TXT")
            r5 = nil
          end
          s0 << r5
          if r5
            r6 = _nt_space
            s0 << r6
            if r6
              r7 = _nt_txt_data
              s0 << r7
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(TxtRecord0)
    r0.extend(TxtRecord1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:txt_record][start_index] = r0

  r0
end

#_nt_variable ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 174

def _nt_variable
  start_index = index
  if node_cache[:variable].has_key?(index)
    cached = node_cache[:variable][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("$", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure("$")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      if has_terminal?('\G[a-zA-Z0-9]', true, index)
        r3 = true
        @index += 1
      else
        r3 = nil
      end
      if r3
        s2 << r3
      else
        break
      end
    end
    if s2.empty?
      @index = i2
      r2 = nil
    else
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    end
    s0 << r2
    if r2
      r4 = _nt_space
      s0 << r4
      if r4
        s5, i5 = [], index
        loop do
          if has_terminal?('\G[a-zA-Z0-9\\.\\-]', true, index)
            r6 = true
            @index += 1
          else
            r6 = nil
          end
          if r6
            s5 << r6
          else
            break
          end
        end
        if s5.empty?
          @index = i5
          r5 = nil
        else
          r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        end
        s0 << r5
        if r5
          r8 = _nt_space
          if r8
            r7 = r8
          else
            r7 = instantiate_node(SyntaxNode,input, index...index)
          end
          s0 << r7
          if r7
            r10 = _nt_comment
            if r10
              r9 = r10
            else
              r9 = instantiate_node(SyntaxNode,input, index...index)
            end
            s0 << r9
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Variable0)
    r0.extend(Variable1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:variable][start_index] = r0

  r0
end

#_nt_zone ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 53

def _nt_zone
  start_index = index
  if node_cache[:zone].has_key?(index)
    cached = node_cache[:zone][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    i2 = index
    r3 = _nt_variable
    if r3
      r2 = r3
    else
      r4 = _nt_space_or_break
      if r4
        r2 = r4
      else
        r5 = _nt_comment
        if r5
          r2 = r5
        else
          @index = i2
          r2 = nil
        end
      end
    end
    if r2
      s1 << r2
    else
      break
    end
  end
  r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  s0 << r1
  if r1
    r6 = _nt_soa
    s0 << r6
    if r6
      s7, i7 = [], index
      loop do
        i8 = index
        r9 = _nt_resource_record
        if r9
          r8 = r9
        else
          r10 = _nt_variable
          if r10
            r8 = r10
          else
            r11 = _nt_comment
            if r11
              r8 = r11
            else
              r12 = _nt_space
              if r12
                r8 = r12
              else
                r13 = _nt_linebreak
                if r13
                  r8 = r13
                else
                  @index = i8
                  r8 = nil
                end
              end
            end
          end
        end
        if r8
          s7 << r8
        else
          break
        end
      end
      r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
      s0 << r7
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Zone0)
    r0.extend(Zone1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:zone][start_index] = r0

  r0
end

#root ⇒ Object 



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# File 'lib/dns/zonefile/parser.rb', line 11

def root
  @root ||= :zone
end