C2338 Cannot format an argument. To make type T formattable provide a formatter＜T＞ specialization:

C2338	Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt	

Calling spdlog when , This is a mistake .

 SPDLOG_LOGGER_CALL(logger, spdlog::level::level_enum::debug, "so {}", eCode);

Because eCode It's an enumeration , and spdlog The template in does not support enumeration .

Solution ： int Coercive transformation .

 SPDLOG_LOGGER_CALL(logger, spdlog::level::level_enum::debug, "so {}", int(eCode));