Module: Mail::RFC2822Obsolete

Includes:
Treetop::Runtime
Included in:
RFC2822, RFC2822ObsoleteParser
Defined in:
lib/mail/parsers/rfc2822_obsolete.rb

Defined Under Namespace

Modules: ObsAddrList0, ObsAddrList1, ObsAngleAddr0, ObsBcc0, ObsCc0, ObsComments0, ObsDay0, ObsDay1, ObsDayOfWeek0, ObsDomain0, ObsDomain1, ObsDomainList0, ObsDomainList1, ObsFWS0, ObsFWS1, ObsFrom0, ObsHour0, ObsHour1, ObsInReplyTo0, ObsKeywords0, ObsLocalPart0, ObsLocalPart1, ObsMboxList0, ObsMboxList1, ObsMessageId0, ObsMinute0, ObsMinute1, ObsMonth0, ObsOptional0, ObsOrigDate0, ObsPhraseList0, ObsPhraseList1, ObsQp0, ObsReceived0, ObsReferences0, ObsReplyTo0, ObsResentBcc0, ObsResentCc0, ObsResentDate0, ObsResentFrom0, ObsResentMid0, ObsResentRply0, ObsResentSend0, ObsResentTo0, ObsReturn0, ObsRoute0, ObsSecond0, ObsSecond1, ObsSender0, ObsSubject0, ObsText0, ObsText1, ObsTo0, ObsYear0, ObsYear1

Instance Method Summary collapse

Instance Method Details

#_nt_obs_addr_list ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1559

def _nt_obs_addr_list
  start_index = index
  if node_cache[:obs_addr_list].has_key?(index)
    cached = node_cache[:obs_addr_list][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    i2, s2 = index, []
    r4 = _nt_address
    if r4
      r3 = r4
    else
      r3 = instantiate_node(SyntaxNode,input, index...index)
    end
    s2 << r3
    if r3
      r6 = _nt_CFWS
      if r6
        r5 = r6
      else
        r5 = instantiate_node(SyntaxNode,input, index...index)
      end
      s2 << r5
      if r5
        if has_terminal?(",", false, index)
          r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure(",")
          r7 = nil
        end
        s2 << r7
        if r7
          r9 = _nt_CFWS
          if r9
            r8 = r9
          else
            r8 = instantiate_node(SyntaxNode,input, index...index)
          end
          s2 << r8
        end
      end
    end
    if s2.last
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      r2.extend(ObsAddrList0)
    else
      @index = i2
      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
    r11 = _nt_address
    if r11
      r10 = r11
    else
      r10 = instantiate_node(SyntaxNode,input, index...index)
    end
    s0 << r10
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsAddrList1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_addr_list][start_index] = r0

  r0
end

#_nt_obs_angle_addr ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1083

def _nt_obs_angle_addr
  start_index = index
  if node_cache[:obs_angle_addr].has_key?(index)
    cached = node_cache[:obs_angle_addr][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  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
      r5 = _nt_obs_route
      if r5
        r4 = r5
      else
        r4 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r4
      if r4
        r6 = _nt_addr_spec
        s0 << r6
        if r6
          if has_terminal?(">", false, index)
            r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
            @index += 1
          else
            terminal_parse_failure(">")
            r7 = nil
          end
          s0 << r7
          if r7
            r9 = _nt_CFWS
            if r9
              r8 = r9
            else
              r8 = instantiate_node(SyntaxNode,input, index...index)
            end
            s0 << r8
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsAngleAddr0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_angle_addr][start_index] = r0

  r0
end

#_nt_obs_bcc ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2226

def _nt_obs_bcc
  start_index = index
  if node_cache[:obs_bcc].has_key?(index)
    cached = node_cache[:obs_bcc][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Bcc", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 3))
    @index += 3
  else
    terminal_parse_failure("Bcc")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        i5 = index
        r6 = _nt_address_list
        if r6
          r5 = r6
        else
          r8 = _nt_CFWS
          if r8
            r7 = r8
          else
            r7 = instantiate_node(SyntaxNode,input, index...index)
          end
          if r7
            r5 = r7
          else
            @index = i5
            r5 = nil
          end
        end
        s0 << r5
        if r5
          r9 = _nt_CRLF
          s0 << r9
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsBcc0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_bcc][start_index] = r0

  r0
end

#_nt_obs_cc ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2159

def _nt_obs_cc
  start_index = index
  if node_cache[:obs_cc].has_key?(index)
    cached = node_cache[:obs_cc][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Cc", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 2))
    @index += 2
  else
    terminal_parse_failure("Cc")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_address_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsCc0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_cc][start_index] = r0

  r0
end

#_nt_obs_char ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 158

def _nt_obs_char
  start_index = index
  if node_cache[:obs_char].has_key?(index)
    cached = node_cache[:obs_char][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0 = index
  if has_terminal?('\G[\\x00-\\x09]', true, index)
    r1 = true
    @index += 1
  else
    r1 = nil
  end
  if r1
    r0 = r1
  else
    if has_terminal?('\G[\\x0B-\\x0C]', true, index)
      r2 = true
      @index += 1
    else
      r2 = nil
    end
    if r2
      r0 = r2
    else
      if has_terminal?('\G[\\x0E-\\x7F]', true, index)
        r3 = true
        @index += 1
      else
        r3 = nil
      end
      if r3
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:obs_char][start_index] = r0

  r0
end

#_nt_obs_comments ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2662

def _nt_obs_comments
  start_index = index
  if node_cache[:obs_comments].has_key?(index)
    cached = node_cache[:obs_comments][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Comments", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 8))
    @index += 8
  else
    terminal_parse_failure("Comments")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_unstructured
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsComments0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_comments][start_index] = r0

  r0
end

#_nt_obs_day ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 638

def _nt_obs_day
  start_index = index
  if node_cache[:obs_day].has_key?(index)
    cached = node_cache[:obs_day][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    i3 = index
    r4 = _nt_DIGIT
    if r4
      r3 = r4
    else
      i5, s5 = index, []
      r6 = _nt_DIGIT
      s5 << r6
      if r6
        r7 = _nt_DIGIT
        s5 << r7
      end
      if s5.last
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        r5.extend(ObsDay0)
      else
        @index = i5
        r5 = nil
      end
      if r5
        r3 = r5
      else
        @index = i3
        r3 = nil
      end
    end
    s0 << r3
    if r3
      r9 = _nt_CFWS
      if r9
        r8 = r9
      else
        r8 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r8
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsDay1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_day][start_index] = r0

  r0
end

#_nt_obs_day_of_week ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 469

def _nt_obs_day_of_week
  start_index = index
  if node_cache[:obs_day_of_week].has_key?(index)
    cached = node_cache[:obs_day_of_week][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    r3 = _nt_day_name
    s0 << r3
    if r3
      r5 = _nt_CFWS
      if r5
        r4 = r5
      else
        r4 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsDayOfWeek0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_day_of_week][start_index] = r0

  r0
end

#_nt_obs_domain ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1402

def _nt_obs_domain
  start_index = index
  if node_cache[:obs_domain].has_key?(index)
    cached = node_cache[:obs_domain][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_atom
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      i3, s3 = index, []
      if has_terminal?(".", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(".")
        r4 = nil
      end
      s3 << r4
      if r4
        r5 = _nt_atom
        s3 << r5
      end
      if s3.last
        r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
        r3.extend(ObsDomain0)
      else
        @index = i3
        r3 = nil
      end
      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(ObsDomain1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_domain][start_index] = r0

  r0
end

#_nt_obs_domain_list ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1226

def _nt_obs_domain_list
  start_index = index
  if node_cache[:obs_domain_list].has_key?(index)
    cached = node_cache[:obs_domain_list][index]
    @index = cached.interval.end if cached
    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
    r2 = _nt_domain
    s0 << r2
    if r2
      s3, i3 = [], index
      loop do
        i4, s4 = index, []
        s5, i5 = [], index
        loop do
          if has_terminal?(",", false, index)
            r6 = instantiate_node(SyntaxNode,input, index...(index + 1))
            @index += 1
          else
            terminal_parse_failure(",")
            r6 = nil
          end
          if r6
            s5 << r6
          else
            break
          end
        end
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        s4 << r5
        if r5
          r8 = _nt_CFWS
          if r8
            r7 = r8
          else
            r7 = instantiate_node(SyntaxNode,input, index...index)
          end
          s4 << 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
            s4 << r9
            if r9
              r10 = _nt_domain
              s4 << r10
            end
          end
        end
        if s4.last
          r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
          r4.extend(ObsDomainList0)
        else
          @index = i4
          r4 = nil
        end
        if r4
          s3 << r4
        else
          break
        end
      end
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      s0 << r3
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsDomainList1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_domain_list][start_index] = r0

  r0
end

#_nt_obs_fields ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1648

def _nt_obs_fields
  start_index = index
  if node_cache[:obs_fields].has_key?(index)
    cached = node_cache[:obs_fields][index]
    @index = cached.interval.end if cached
    return cached
  end

  s0, i0 = [], index
  loop do
    i1 = index
    r2 = _nt_obs_return
    if r2
      r1 = r2
    else
      r3 = _nt_obs_received
      if r3
        r1 = r3
      else
        r4 = _nt_obs_orig_date
        if r4
          r1 = r4
        else
          r5 = _nt_obs_from
          if r5
            r1 = r5
          else
            r6 = _nt_obs_sender
            if r6
              r1 = r6
            else
              r7 = _nt_obs_reply_to
              if r7
                r1 = r7
              else
                r8 = _nt_obs_to
                if r8
                  r1 = r8
                else
                  r9 = _nt_obs_cc
                  if r9
                    r1 = r9
                  else
                    r10 = _nt_obs_bcc
                    if r10
                      r1 = r10
                    else
                      r11 = _nt_obs_message_id
                      if r11
                        r1 = r11
                      else
                        r12 = _nt_obs_in_reply_to
                        if r12
                          r1 = r12
                        else
                          r13 = _nt_obs_references
                          if r13
                            r1 = r13
                          else
                            r14 = _nt_obs_subject
                            if r14
                              r1 = r14
                            else
                              r15 = _nt_obs_comments
                              if r15
                                r1 = r15
                              else
                                r16 = _nt_obs_keywords
                                if r16
                                  r1 = r16
                                else
                                  r17 = _nt_obs_resent_date
                                  if r17
                                    r1 = r17
                                  else
                                    r18 = _nt_obs_resent_from
                                    if r18
                                      r1 = r18
                                    else
                                      r19 = _nt_obs_resent_send
                                      if r19
                                        r1 = r19
                                      else
                                        r20 = _nt_obs_resent_rply
                                        if r20
                                          r1 = r20
                                        else
                                          r21 = _nt_obs_resent_to
                                          if r21
                                            r1 = r21
                                          else
                                            r22 = _nt_obs_resent_cc
                                            if r22
                                              r1 = r22
                                            else
                                              r23 = _nt_obs_resent_bcc
                                              if r23
                                                r1 = r23
                                              else
                                                r24 = _nt_obs_resent_mid
                                                if r24
                                                  r1 = r24
                                                else
                                                  r25 = _nt_obs_optional
                                                  if r25
                                                    r1 = r25
                                                  else
                                                    @index = i1
                                                    r1 = nil
                                                  end
                                                end
                                              end
                                            end
                                          end
                                        end
                                      end
                                    end
                                  end
                                end
                              end
                            end
                          end
                        end
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  r0 = instantiate_node(SyntaxNode,input, i0...index, s0)

  node_cache[:obs_fields][start_index] = r0

  r0
end

#_nt_obs_from ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1875

def _nt_obs_from
  start_index = index
  if node_cache[:obs_from].has_key?(index)
    cached = node_cache[:obs_from][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("From", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 4))
    @index += 4
  else
    terminal_parse_failure("From")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_mailbox_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsFrom0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_from][start_index] = r0

  r0
end

#_nt_obs_FWS ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 384

def _nt_obs_FWS
  start_index = index
  if node_cache[:obs_FWS].has_key?(index)
    cached = node_cache[:obs_FWS][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    r2 = _nt_WSP
    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
    s3, i3 = [], index
    loop do
      i4, s4 = index, []
      r5 = _nt_CRLF
      s4 << r5
      if r5
        s6, i6 = [], index
        loop do
          r7 = _nt_WSP
          if r7
            s6 << r7
          else
            break
          end
        end
        if s6.empty?
          @index = i6
          r6 = nil
        else
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
        end
        s4 << r6
      end
      if s4.last
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        r4.extend(ObsFWS0)
      else
        @index = i4
        r4 = nil
      end
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s0 << r3
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsFWS1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_FWS][start_index] = r0

  r0
end

#_nt_obs_hour ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 718

def _nt_obs_hour
  start_index = index
  if node_cache[:obs_hour].has_key?(index)
    cached = node_cache[:obs_hour][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    i3, s3 = index, []
    r4 = _nt_DIGIT
    s3 << r4
    if r4
      r5 = _nt_DIGIT
      s3 << r5
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(ObsHour0)
    else
      @index = i3
      r3 = nil
    end
    s0 << r3
    if r3
      r7 = _nt_CFWS
      if r7
        r6 = r7
      else
        r6 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r6
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsHour1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_hour][start_index] = r0

  r0
end

#_nt_obs_id_left ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2551

def _nt_obs_id_left
  start_index = index
  if node_cache[:obs_id_left].has_key?(index)
    cached = node_cache[:obs_id_left][index]
    @index = cached.interval.end if cached
    return cached
  end

  r0 = _nt_local_part

  node_cache[:obs_id_left][start_index] = r0

  r0
end

#_nt_obs_id_right ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2566

def _nt_obs_id_right
  start_index = index
  if node_cache[:obs_id_right].has_key?(index)
    cached = node_cache[:obs_id_right][index]
    @index = cached.interval.end if cached
    return cached
  end

  r0 = _nt_domain

  node_cache[:obs_id_right][start_index] = r0

  r0
end

#_nt_obs_in_reply_to ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2381

def _nt_obs_in_reply_to
  start_index = index
  if node_cache[:obs_in_reply_to].has_key?(index)
    cached = node_cache[:obs_in_reply_to][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("In-Reply-To", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 11))
    @index += 11
  else
    terminal_parse_failure("In-Reply-To")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        s5, i5 = [], index
        loop do
          i6 = index
          r7 = _nt_phrase
          if r7
            r6 = r7
          else
            r8 = _nt_msg_id
            if r8
              r6 = r8
            else
              @index = i6
              r6 = nil
            end
          end
          if r6
            s5 << r6
          else
            break
          end
        end
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        s0 << r5
        if r5
          r9 = _nt_CRLF
          s0 << r9
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsInReplyTo0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_in_reply_to][start_index] = r0

  r0
end

#_nt_obs_keywords ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2733

def _nt_obs_keywords
  start_index = index
  if node_cache[:obs_keywords].has_key?(index)
    cached = node_cache[:obs_keywords][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Keywords", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 8))
    @index += 8
  else
    terminal_parse_failure("Keywords")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_obs_phrase_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsKeywords0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_keywords][start_index] = r0

  r0
end

#_nt_obs_local_part ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1333

def _nt_obs_local_part
  start_index = index
  if node_cache[:obs_local_part].has_key?(index)
    cached = node_cache[:obs_local_part][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_word
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      i3, s3 = index, []
      if has_terminal?(".", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(".")
        r4 = nil
      end
      s3 << r4
      if r4
        r5 = _nt_word
        s3 << r5
      end
      if s3.last
        r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
        r3.extend(ObsLocalPart0)
      else
        @index = i3
        r3 = nil
      end
      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(ObsLocalPart1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_local_part][start_index] = r0

  r0
end

#_nt_obs_mbox_list ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1464

def _nt_obs_mbox_list
  start_index = index
  if node_cache[:obs_mbox_list].has_key?(index)
    cached = node_cache[:obs_mbox_list][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    i2, s2 = index, []
    r4 = _nt_mailbox
    if r4
      r3 = r4
    else
      r3 = instantiate_node(SyntaxNode,input, index...index)
    end
    s2 << r3
    if r3
      r6 = _nt_CFWS
      if r6
        r5 = r6
      else
        r5 = instantiate_node(SyntaxNode,input, index...index)
      end
      s2 << r5
      if r5
        if has_terminal?(",", false, index)
          r7 = instantiate_node(SyntaxNode,input, index...(index + 1))
          @index += 1
        else
          terminal_parse_failure(",")
          r7 = nil
        end
        s2 << r7
        if r7
          r9 = _nt_CFWS
          if r9
            r8 = r9
          else
            r8 = instantiate_node(SyntaxNode,input, index...index)
          end
          s2 << r8
        end
      end
    end
    if s2.last
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      r2.extend(ObsMboxList0)
    else
      @index = i2
      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
    r11 = _nt_mailbox
    if r11
      r10 = r11
    else
      r10 = instantiate_node(SyntaxNode,input, index...index)
    end
    s0 << r10
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsMboxList1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_mbox_list][start_index] = r0

  r0
end

#_nt_obs_message_id ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2314

def _nt_obs_message_id
  start_index = index
  if node_cache[:obs_message_id].has_key?(index)
    cached = node_cache[:obs_message_id][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Message-ID", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 10))
    @index += 10
  else
    terminal_parse_failure("Message-ID")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_msg_id
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsMessageId0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_message_id][start_index] = r0

  r0
end

#_nt_obs_minute ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 786

def _nt_obs_minute
  start_index = index
  if node_cache[:obs_minute].has_key?(index)
    cached = node_cache[:obs_minute][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    i3, s3 = index, []
    r4 = _nt_DIGIT
    s3 << r4
    if r4
      r5 = _nt_DIGIT
      s3 << r5
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(ObsMinute0)
    else
      @index = i3
      r3 = nil
    end
    s0 << r3
    if r3
      r7 = _nt_CFWS
      if r7
        r6 = r7
      else
        r6 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r6
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsMinute1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_minute][start_index] = r0

  r0
end

#_nt_obs_month ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 593

def _nt_obs_month
  start_index = index
  if node_cache[:obs_month].has_key?(index)
    cached = node_cache[:obs_month][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_CFWS
  s0 << r1
  if r1
    r2 = _nt_month_name
    s0 << r2
    if r2
      r3 = _nt_CFWS
      s0 << r3
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsMonth0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_month][start_index] = r0

  r0
end

#_nt_obs_optional ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3546

def _nt_obs_optional
  start_index = index
  if node_cache[:obs_optional].has_key?(index)
    cached = node_cache[:obs_optional][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_field_name
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_unstructured
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsOptional0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_optional][start_index] = r0

  r0
end

#_nt_obs_orig_date ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1804

def _nt_obs_orig_date
  start_index = index
  if node_cache[:obs_orig_date].has_key?(index)
    cached = node_cache[:obs_orig_date][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Date", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 4))
    @index += 4
  else
    terminal_parse_failure("Date")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_date_time
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsOrigDate0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_orig_date][start_index] = r0

  r0
end

#_nt_obs_path ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3517

def _nt_obs_path
  start_index = index
  if node_cache[:obs_path].has_key?(index)
    cached = node_cache[:obs_path][index]
    @index = cached.interval.end if cached
    return cached
  end

  r0 = _nt_obs_angle_addr

  node_cache[:obs_path][start_index] = r0

  r0
end

#_nt_obs_phrase ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 220

def _nt_obs_phrase
  start_index = index
  if node_cache[:obs_phrase].has_key?(index)
    cached = node_cache[:obs_phrase][index]
    @index = cached.interval.end if cached
    return cached
  end

  s0, i0 = [], index
  loop do
    i1 = index
    r2 = _nt_word
    if r2
      r1 = r2
    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
        r1 = r3
      else
        @index = i1
        r1 = nil
      end
    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)
  end

  node_cache[:obs_phrase][start_index] = r0

  r0
end

#_nt_obs_phrase_list ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 273

def _nt_obs_phrase_list
  start_index = index
  if node_cache[:obs_phrase_list].has_key?(index)
    cached = node_cache[:obs_phrase_list][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0 = index
  r1 = _nt_phrase
  if r1
    r0 = r1
  else
    i2, s2 = index, []
    s3, i3 = [], index
    loop do
      i4, s4 = index, []
      r6 = _nt_phrase
      if r6
        r5 = r6
      else
        r5 = instantiate_node(SyntaxNode,input, index...index)
      end
      s4 << r5
      if r5
        r8 = _nt_CFWS
        if r8
          r7 = r8
        else
          r7 = instantiate_node(SyntaxNode,input, index...index)
        end
        s4 << 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
          s4 << r9
          if r9
            r11 = _nt_CFWS
            if r11
              r10 = r11
            else
              r10 = instantiate_node(SyntaxNode,input, index...index)
            end
            s4 << r10
          end
        end
      end
      if s4.last
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        r4.extend(ObsPhraseList0)
      else
        @index = i4
        r4 = nil
      end
      if r4
        s3 << r4
      else
        break
      end
    end
    if s3.empty?
      @index = i3
      r3 = nil
    else
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    end
    s2 << r3
    if r3
      r13 = _nt_phrase
      if r13
        r12 = r13
      else
        r12 = instantiate_node(SyntaxNode,input, index...index)
      end
      s2 << r12
    end
    if s2.last
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      r2.extend(ObsPhraseList1)
    else
      @index = i2
      r2 = nil
    end
    if r2
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:obs_phrase_list][start_index] = r0

  r0
end

#_nt_obs_qp ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 15

def _nt_obs_qp
  start_index = index
  if node_cache[:obs_qp].has_key?(index)
    cached = node_cache[:obs_qp][index]
    @index = cached.interval.end if cached
    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
    if has_terminal?('\G[\\x00-\\x7F]', true, index)
      r2 = true
      @index += 1
    else
      r2 = nil
    end
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsQp0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_qp][start_index] = r0

  r0
end

#_nt_obs_received ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3456

def _nt_obs_received
  start_index = index
  if node_cache[:obs_received].has_key?(index)
    cached = node_cache[:obs_received][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Received", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 8))
    @index += 8
  else
    terminal_parse_failure("Received")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_name_val_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsReceived0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_received][start_index] = r0

  r0
end

#_nt_obs_references ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2469

def _nt_obs_references
  start_index = index
  if node_cache[:obs_references].has_key?(index)
    cached = node_cache[:obs_references][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("References", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 10))
    @index += 10
  else
    terminal_parse_failure("References")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        s5, i5 = [], index
        loop do
          i6 = index
          r7 = _nt_phrase
          if r7
            r6 = r7
          else
            r8 = _nt_msg_id
            if r8
              r6 = r8
            else
              @index = i6
              r6 = nil
            end
          end
          if r6
            s5 << r6
          else
            break
          end
        end
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        s0 << r5
        if r5
          r9 = _nt_CRLF
          s0 << r9
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsReferences0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_references][start_index] = r0

  r0
end

#_nt_obs_reply_to ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2017

def _nt_obs_reply_to
  start_index = index
  if node_cache[:obs_reply_to].has_key?(index)
    cached = node_cache[:obs_reply_to][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Reply-To", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 8))
    @index += 8
  else
    terminal_parse_failure("Reply-To")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_mailbox_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsReplyTo0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_reply_to][start_index] = r0

  r0
end

#_nt_obs_resent_bcc ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3155

def _nt_obs_resent_bcc
  start_index = index
  if node_cache[:obs_resent_bcc].has_key?(index)
    cached = node_cache[:obs_resent_bcc][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Bcc", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 10))
    @index += 10
  else
    terminal_parse_failure("Resent-Bcc")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        i5 = index
        r6 = _nt_address_list
        if r6
          r5 = r6
        else
          r8 = _nt_CFWS
          if r8
            r7 = r8
          else
            r7 = instantiate_node(SyntaxNode,input, index...index)
          end
          if r7
            r5 = r7
          else
            @index = i5
            r5 = nil
          end
        end
        s0 << r5
        if r5
          r9 = _nt_CRLF
          s0 << r9
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentBcc0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_bcc][start_index] = r0

  r0
end

#_nt_obs_resent_cc ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3088

def _nt_obs_resent_cc
  start_index = index
  if node_cache[:obs_resent_cc].has_key?(index)
    cached = node_cache[:obs_resent_cc][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Cc", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 9))
    @index += 9
  else
    terminal_parse_failure("Resent-Cc")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_address_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentCc0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_cc][start_index] = r0

  r0
end

#_nt_obs_resent_date ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2946

def _nt_obs_resent_date
  start_index = index
  if node_cache[:obs_resent_date].has_key?(index)
    cached = node_cache[:obs_resent_date][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Date", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 11))
    @index += 11
  else
    terminal_parse_failure("Resent-Date")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_date_time
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentDate0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_date][start_index] = r0

  r0
end

#_nt_obs_resent_from ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2804

def _nt_obs_resent_from
  start_index = index
  if node_cache[:obs_resent_from].has_key?(index)
    cached = node_cache[:obs_resent_from][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-From", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 11))
    @index += 11
  else
    terminal_parse_failure("Resent-From")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_mailbox_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentFrom0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_from][start_index] = r0

  r0
end

#_nt_obs_resent_mid ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3243

def _nt_obs_resent_mid
  start_index = index
  if node_cache[:obs_resent_mid].has_key?(index)
    cached = node_cache[:obs_resent_mid][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Message-ID", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 17))
    @index += 17
  else
    terminal_parse_failure("Resent-Message-ID")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_msg_id
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentMid0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_mid][start_index] = r0

  r0
end

#_nt_obs_resent_rply ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3314

def _nt_obs_resent_rply
  start_index = index
  if node_cache[:obs_resent_rply].has_key?(index)
    cached = node_cache[:obs_resent_rply][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Reply-To", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 15))
    @index += 15
  else
    terminal_parse_failure("Resent-Reply-To")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_address_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentRply0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_rply][start_index] = r0

  r0
end

#_nt_obs_resent_send ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2875

def _nt_obs_resent_send
  start_index = index
  if node_cache[:obs_resent_send].has_key?(index)
    cached = node_cache[:obs_resent_send][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-Sender", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 13))
    @index += 13
  else
    terminal_parse_failure("Resent-Sender")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_mailbox
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentSend0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_send][start_index] = r0

  r0
end

#_nt_obs_resent_to ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3017

def _nt_obs_resent_to
  start_index = index
  if node_cache[:obs_resent_to].has_key?(index)
    cached = node_cache[:obs_resent_to][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Resent-To", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 9))
    @index += 9
  else
    terminal_parse_failure("Resent-To")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_address_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsResentTo0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_resent_to][start_index] = r0

  r0
end

#_nt_obs_return ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 3385

def _nt_obs_return
  start_index = index
  if node_cache[:obs_return].has_key?(index)
    cached = node_cache[:obs_return][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Return-Path", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 11))
    @index += 11
  else
    terminal_parse_failure("Return-Path")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_path
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsReturn0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_return][start_index] = r0

  r0
end

#_nt_obs_route ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1161

def _nt_obs_route
  start_index = index
  if node_cache[:obs_route].has_key?(index)
    cached = node_cache[:obs_route][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    r3 = _nt_obs_domain_list
    s0 << r3
    if r3
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r6 = _nt_CFWS
        if r6
          r5 = r6
        else
          r5 = instantiate_node(SyntaxNode,input, index...index)
        end
        s0 << r5
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsRoute0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_route][start_index] = r0

  r0
end

#_nt_obs_second ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 854

def _nt_obs_second
  start_index = index
  if node_cache[:obs_second].has_key?(index)
    cached = node_cache[:obs_second][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    i3, s3 = index, []
    r4 = _nt_DIGIT
    s3 << r4
    if r4
      r5 = _nt_DIGIT
      s3 << r5
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(ObsSecond0)
    else
      @index = i3
      r3 = nil
    end
    s0 << r3
    if r3
      r7 = _nt_CFWS
      if r7
        r6 = r7
      else
        r6 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r6
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsSecond1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_second][start_index] = r0

  r0
end

#_nt_obs_sender ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 1946

def _nt_obs_sender
  start_index = index
  if node_cache[:obs_sender].has_key?(index)
    cached = node_cache[:obs_sender][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Sender", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 6))
    @index += 6
  else
    terminal_parse_failure("Sender")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_mailbox
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsSender0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_sender][start_index] = r0

  r0
end

#_nt_obs_subject ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2591

def _nt_obs_subject
  start_index = index
  if node_cache[:obs_subject].has_key?(index)
    cached = node_cache[:obs_subject][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("Subject", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 7))
    @index += 7
  else
    terminal_parse_failure("Subject")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_unstructured
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsSubject0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_subject][start_index] = r0

  r0
end

#_nt_obs_text ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 64

def _nt_obs_text
  start_index = index
  if node_cache[:obs_text].has_key?(index)
    cached = node_cache[:obs_text][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    r2 = _nt_LF
    if r2
      s1 << r2
    else
      break
    end
  end
  r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  s0 << r1
  if r1
    s3, i3 = [], index
    loop do
      r4 = _nt_CR
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s0 << r3
    if r3
      s5, i5 = [], index
      loop do
        i6, s6 = index, []
        r7 = _nt_obs_char
        s6 << r7
        if r7
          s8, i8 = [], index
          loop do
            r9 = _nt_LF
            if r9
              s8 << r9
            else
              break
            end
          end
          r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
          s6 << r8
          if r8
            s10, i10 = [], index
            loop do
              r11 = _nt_CR
              if r11
                s10 << r11
              else
                break
              end
            end
            r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
            s6 << r10
          end
        end
        if s6.last
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          r6.extend(ObsText0)
        else
          @index = i6
          r6 = nil
        end
        if r6
          s5 << r6
        else
          break
        end
      end
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
      s0 << r5
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsText1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_text][start_index] = r0

  r0
end

#_nt_obs_to ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 2088

def _nt_obs_to
  start_index = index
  if node_cache[:obs_to].has_key?(index)
    cached = node_cache[:obs_to][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  if has_terminal?("To", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 2))
    @index += 2
  else
    terminal_parse_failure("To")
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_WSP
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if has_terminal?(":", false, index)
        r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(":")
        r4 = nil
      end
      s0 << r4
      if r4
        r5 = _nt_address_list
        s0 << r5
        if r5
          r6 = _nt_CRLF
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsTo0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_to][start_index] = r0

  r0
end

#_nt_obs_utext ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 205

def _nt_obs_utext
  start_index = index
  if node_cache[:obs_utext].has_key?(index)
    cached = node_cache[:obs_utext][index]
    @index = cached.interval.end if cached
    return cached
  end

  r0 = _nt_obs_text

  node_cache[:obs_utext][start_index] = r0

  r0
end

#_nt_obs_year ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 524

def _nt_obs_year
  start_index = index
  if node_cache[:obs_year].has_key?(index)
    cached = node_cache[:obs_year][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_CFWS
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    i3, s3 = index, []
    r4 = _nt_DIGIT
    s3 << r4
    if r4
      r5 = _nt_DIGIT
      s3 << r5
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(ObsYear0)
    else
      @index = i3
      r3 = nil
    end
    s0 << r3
    if r3
      r7 = _nt_CFWS
      if r7
        r6 = r7
      else
        r6 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r6
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ObsYear1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:obs_year][start_index] = r0

  r0
end

#_nt_obs_zone ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 909

def _nt_obs_zone
  start_index = index
  if node_cache[:obs_zone].has_key?(index)
    cached = node_cache[:obs_zone][index]
    @index = cached.interval.end if cached
    return cached
  end

  i0 = index
  if has_terminal?("UT", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 2))
    @index += 2
  else
    terminal_parse_failure("UT")
    r1 = nil
  end
  if r1
    r0 = r1
  else
    if has_terminal?("GMT", false, index)
      r2 = instantiate_node(SyntaxNode,input, index...(index + 3))
      @index += 3
    else
      terminal_parse_failure("GMT")
      r2 = nil
    end
    if r2
      r0 = r2
    else
      if has_terminal?("EST", false, index)
        r3 = instantiate_node(SyntaxNode,input, index...(index + 3))
        @index += 3
      else
        terminal_parse_failure("EST")
        r3 = nil
      end
      if r3
        r0 = r3
      else
        if has_terminal?("EDT", false, index)
          r4 = instantiate_node(SyntaxNode,input, index...(index + 3))
          @index += 3
        else
          terminal_parse_failure("EDT")
          r4 = nil
        end
        if r4
          r0 = r4
        else
          if has_terminal?("CST", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 3))
            @index += 3
          else
            terminal_parse_failure("CST")
            r5 = nil
          end
          if r5
            r0 = r5
          else
            if has_terminal?("CDT", false, index)
              r6 = instantiate_node(SyntaxNode,input, index...(index + 3))
              @index += 3
            else
              terminal_parse_failure("CDT")
              r6 = nil
            end
            if r6
              r0 = r6
            else
              if has_terminal?("MST", false, index)
                r7 = instantiate_node(SyntaxNode,input, index...(index + 3))
                @index += 3
              else
                terminal_parse_failure("MST")
                r7 = nil
              end
              if r7
                r0 = r7
              else
                if has_terminal?("MDT", false, index)
                  r8 = instantiate_node(SyntaxNode,input, index...(index + 3))
                  @index += 3
                else
                  terminal_parse_failure("MDT")
                  r8 = nil
                end
                if r8
                  r0 = r8
                else
                  if has_terminal?("PST", false, index)
                    r9 = instantiate_node(SyntaxNode,input, index...(index + 3))
                    @index += 3
                  else
                    terminal_parse_failure("PST")
                    r9 = nil
                  end
                  if r9
                    r0 = r9
                  else
                    if has_terminal?("PDT", false, index)
                      r10 = instantiate_node(SyntaxNode,input, index...(index + 3))
                      @index += 3
                    else
                      terminal_parse_failure("PDT")
                      r10 = nil
                    end
                    if r10
                      r0 = r10
                    else
                      if has_terminal?('\G[\\x41-\\x49]', true, index)
                        r11 = true
                        @index += 1
                      else
                        r11 = nil
                      end
                      if r11
                        r0 = r11
                      else
                        if has_terminal?('\G[\\x4B-\\x5A]', true, index)
                          r12 = true
                          @index += 1
                        else
                          r12 = nil
                        end
                        if r12
                          r0 = r12
                        else
                          if has_terminal?('\G[\\x61-\\x69]', true, index)
                            r13 = true
                            @index += 1
                          else
                            r13 = nil
                          end
                          if r13
                            r0 = r13
                          else
                            if has_terminal?('\G[\\x6B-\\x7A]', true, index)
                              r14 = true
                              @index += 1
                            else
                              r14 = nil
                            end
                            if r14
                              r0 = r14
                            else
                              @index = i0
                              r0 = nil
                            end
                          end
                        end
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end

  node_cache[:obs_zone][start_index] = r0

  r0
end

#root ⇒ Object 



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# File 'lib/mail/parsers/rfc2822_obsolete.rb', line 8

def root
  @root ||= :obs_qp
end