return mlir::failure();

  if (options.has_key &&
      (parser.parseKeyword("key") || parser.parseLParen() ||
       parser.parseAttribute(op_key, "op_key", result.attributes) ||
       parser.parseRParen()))
    return mlir::failure();

  if (options.has_cost &&
      (parser.parseKeyword("cost") || parser.parseLParen() ||
       parser.parseAttribute(cost, "_tfrt_cost", result.attributes) ||

      >();
}

/// Parse a type registered to this dialect.
Type FallbackDialect::parseType(DialectAsmParser &parser) const {
  StringRef keyword;
  if (parser.parseKeyword(&keyword)) return Type();

  if (keyword == "tf_tensor") return TFTensorType::get(getContext());
  if (keyword == "tf_allocator") return TFAllocatorType::get(getContext());

      >();
}

// Parse a type registered to this dialect.
mlir::Type MlrtDialect::parseType(mlir::DialectAsmParser &parser) const {
  llvm::StringRef keyword;
  if (parser.parseKeyword(&keyword)) return mlir::Type();

  if (keyword == "future") return FutureType::get(getContext());
  if (keyword == "promise") return PromiseType::get(getContext());

      >();
}

// Parse a type registered to this dialect.
mlir::Type TensorflowMlrtDialect::parseType(
    mlir::DialectAsmParser &parser) const {
  llvm::StringRef keyword;
  if (parser.parseKeyword(&keyword)) return mlir::Type();

  if (keyword == "tensor") return TFTensorType::get(getContext());

  parser.emitError(parser.getNameLoc(), "unknown type: ") << keyword;
  return mlir::Type();
}

  addTypes<ControlType, TokenType>();
}

Type TensorFlowExecutorDialect::parseType(DialectAsmParser &parser) const {
  StringRef data_type;
  if (parser.parseKeyword(&data_type)) return Type();

  if (data_type == "control") return ControlType::get(getContext());
  if (data_type == "token") return TokenType::get(getContext());
  parser.emitError(parser.getNameLoc())

          parser, builder, result, builder.getType<fallback::TFTensorType>(),
          parse_options)))
    return mlir::failure();

  mlir::IntegerAttr num_args;
  if (parser.parseKeyword("num_args") || parser.parseLParen() ||
      parser.parseAttribute(num_args, "num_args", result.attributes) ||
      parser.parseRParen())
    return mlir::failure();

  return mlir::success();
}

  do {
    OpAsmParser::UnresolvedOperand operand_type;
    if (parser->parseOptionalOperand(operand_type).has_value()) {
      packed_inputs->emplace_back(operand_type);
      if (parser->parseKeyword("as",
                               " between packed input and block argument") ||
          parser->parseOperand(packed_region_args.emplace_back(),
                               /*allowResultNumber=*/false) ||

  StringRef typeNameSpelling;
  if (failed(parser.parseKeyword(&typeNameSpelling))) return {};
  llvm::SmallVector<StringAttr, 4> attrs;
  if (succeeded(parser.parseOptionalLess())) {
    bool l_square_parsed = false;
    if (succeeded(parser.parseOptionalLSquare())) {
      l_square_parsed = true;
    }

    do {
      StringRef attr;
      if (failed(parser.parseKeyword(&attr))) return {};

    os << "control";
    return;
  }
  os << "<unknown TFL type>";
}

Type TFLDialect::parseType(DialectAsmParser& parser) const {
  StringRef data_type;
  if (parser.parseKeyword(&data_type)) return Type();
  if (data_type == "control") return ControlType::get(getContext());
  parser.emitError(parser.getNameLoc()) << "unknown TFL type: " << data_type;
  return nullptr;
}