module Mail::EnvelopeFrom

def _nt_ctime_date
  start_index = index
  if node_cache[:ctime_date].has_key?(index)
    cached = node_cache[:ctime_date][index]
    @index = cached.interval.end if cached
    return cached
  end
  i0, s0 = index, []
  r1 = _nt_day_name
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      if has_terminal?(" ", false, index)
        r3 = instantiate_node(SyntaxNode,input, index...(index + 1))
        @index += 1
      else
        terminal_parse_failure(" ")
        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_month_name
      s0 << r4
      if r4
        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
        if s5.empty?
          @index = i5
          r5 = nil
        else
          r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        end
        s0 << r5
        if r5
          r7 = _nt_day
          s0 << r7
          if r7
            if has_terminal?(" ", false, index)
              r8 = instantiate_node(SyntaxNode,input, index...(index + 1))
              @index += 1
            else
              terminal_parse_failure(" ")
              r8 = nil
            end
            s0 << r8
            if r8
              r9 = _nt_time_of_day
              s0 << r9
              if r9
                if has_terminal?(" ", false, index)
                  r10 = instantiate_node(SyntaxNode,input, index...(index + 1))
                  @index += 1
                else
                  terminal_parse_failure(" ")
                  r10 = nil
                end
                s0 << r10
                if r10
                  r11 = _nt_year
                  s0 << r11
                end
              end
            end
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(CtimeDate0)
  else
    @index = i0
    r0 = nil
  end
  node_cache[:ctime_date][start_index] = r0
  r0
end

def _nt_primary
  start_index = index
  if node_cache[:primary].has_key?(index)
    cached = node_cache[:primary][index]
    @index = cached.interval.end if cached
    return cached
  end
  i0, s0 = index, []
  r1 = _nt_addr_spec
  s0 << r1
  if r1
    r2 = _nt_ctime_date
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Primary0)
  else
    @index = i0
    r0 = nil
  end
  node_cache[:primary][start_index] = r0
  r0
end

def root
  @root ||= :primary
end