module Mail::ContentType

def _nt_attribute
  start_index = index
  if node_cache[:attribute].has_key?(index)
    cached = node_cache[:attribute][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
    r1 = _nt_token
    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[:attribute][start_index] = r0
  r0
end

def _nt_composite_type
  start_index = index
  if node_cache[:composite_type].has_key?(index)
    cached = node_cache[:composite_type][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?("message", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 7))
    @index += 7
  else
    terminal_parse_failure("message")
    r1 = nil
  end
  if r1
    r0 = r1
  else
    if has_terminal?("multipart", false, index)
      r2 = instantiate_node(SyntaxNode,input, index...(index + 9))
      @index += 9
    else
      terminal_parse_failure("multipart")
      r2 = nil
    end
    if r2
      r0 = r2
    else
      r3 = _nt_extension_token
      if r3
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end
  node_cache[:composite_type][start_index] = r0
  r0
end

def _nt_content_type
  start_index = index
  if node_cache[:content_type].has_key?(index)
    cached = node_cache[:content_type][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_main_type
  s0 << r1
  if r1
    if has_terminal?("/", false, index)
      r2 = instantiate_node(SyntaxNode,input, index...(index + 1))
      @index += 1
    else
      terminal_parse_failure("/")
      r2 = nil
    end
    s0 << r2
    if r2
      r3 = _nt_sub_type
      s0 << r3
      if r3
        s4, i4 = [], index
        loop do
          i5, s5 = index, []
          r6 = _nt_CFWS
          s5 << r6
          if r6
            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 = r8
            else
              r7 = instantiate_node(SyntaxNode,input, index...index)
            end
            s5 << r7
            if r7
              r9 = _nt_parameter
              s5 << r9
              if r9
                r10 = _nt_CFWS
                s5 << r10
              end
            end
          end
          if s5.last
            r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
            r5.extend(ContentType0)
          else
            @index = i5
            r5 = nil
          end
          if r5
            s4 << r5
          else
            break
          end
        end
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        s0 << r4
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(ContentType1)
    r0.extend(ContentType2)
  else
    @index = i0
    r0 = nil
  end
  node_cache[:content_type][start_index] = r0
  r0
end

def _nt_discrete_type
  start_index = index
  if node_cache[:discrete_type].has_key?(index)
    cached = node_cache[:discrete_type][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?("text", false, index)
    r1 = instantiate_node(SyntaxNode,input, index...(index + 4))
    @index += 4
  else
    terminal_parse_failure("text")
    r1 = nil
  end
  if r1
    r0 = r1
  else
    if has_terminal?("image", false, index)
      r2 = instantiate_node(SyntaxNode,input, index...(index + 5))
      @index += 5
    else
      terminal_parse_failure("image")
      r2 = nil
    end
    if r2
      r0 = r2
    else
      if has_terminal?("audio", false, index)
        r3 = instantiate_node(SyntaxNode,input, index...(index + 5))
        @index += 5
      else
        terminal_parse_failure("audio")
        r3 = nil
      end
      if r3
        r0 = r3
      else
        if has_terminal?("video", false, index)
          r4 = instantiate_node(SyntaxNode,input, index...(index + 5))
          @index += 5
        else
          terminal_parse_failure("video")
          r4 = nil
        end
        if r4
          r0 = r4
        else
          if has_terminal?("application", false, index)
            r5 = instantiate_node(SyntaxNode,input, index...(index + 11))
            @index += 11
          else
            terminal_parse_failure("application")
            r5 = nil
          end
          if r5
            r0 = r5
          else
            r6 = _nt_extension_token
            if r6
              r0 = r6
            else
              @index = i0
              r0 = nil
            end
          end
        end
      end
    end
  end
  node_cache[:discrete_type][start_index] = r0
  r0
end

def _nt_extension_token
  start_index = index
  if node_cache[:extension_token].has_key?(index)
    cached = node_cache[:extension_token][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end
  i0 = index
  r1 = _nt_ietf_token
  if r1
    r0 = r1
  else
    r2 = _nt_custom_x_token
    if r2
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end
  node_cache[:extension_token][start_index] = r0
  r0
end

def _nt_main_type
  start_index = index
  if node_cache[:main_type].has_key?(index)
    cached = node_cache[:main_type][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end
  i0 = index
  r1 = _nt_discrete_type
  if r1
    r0 = r1
  else
    r2 = _nt_composite_type
    if r2
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end
  node_cache[:main_type][start_index] = r0
  r0
end

def _nt_parameter
  start_index = index
  if node_cache[:parameter].has_key?(index)
    cached = node_cache[:parameter][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    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_attribute
    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
        r5 = _nt_value
        s0 << r5
        if r5
          r7 = _nt_CFWS
          if r7
            r6 = r7
          else
            r6 = instantiate_node(SyntaxNode,input, index...index)
          end
          s0 << r6
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Parameter0)
    r0.extend(Parameter1)
  else
    @index = i0
    r0 = nil
  end
  node_cache[:parameter][start_index] = r0
  r0
end

def _nt_sub_type
  start_index = index
  if node_cache[:sub_type].has_key?(index)
    cached = node_cache[:sub_type][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end
  i0 = index
  r1 = _nt_extension_token
  if r1
    r0 = r1
  else
    r2 = _nt_iana_token
    if r2
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end
  node_cache[:sub_type][start_index] = r0
  r0
end

def _nt_value
  start_index = index
  if node_cache[:value].has_key?(index)
    cached = node_cache[:value][index]
    if cached
      cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end
  i0 = index
  r1 = _nt_quoted_string
  r1.extend(Value0)
  if r1
    r0 = r1
  else
    s2, i2 = [], index
    loop do
      i3 = index
      r4 = _nt_token
      if r4
        r3 = r4
      else
        if has_terminal?('\G[\\x3d]', 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
    if r2
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end
  node_cache[:value][start_index] = r0
  r0
end

def root
  @root ||= :content_type
end