How to get the current spdlog level?

Question

I need to turn off the spdlog level before some code then return it to the previous value after.

How do I get the current level before turning it off?

Answer 1

To get current level of logger use logger::level().

To set new level use logger::set_level().

Answer 2

Scenario 1: User-constructed logger

If you have a spdlog::logger object you're using (say, my_logger), then:

• You can obtain the level with: my_logger.level().
• If you just want to know whether a certain-level message would be logged, then use my_logger.should_log(some_level) where some_level could be, for example spdlog::level::debug.

Scenario 2: The global logger

Now suppose you're using the global logger (e.g. you emit log messages using spdlog::info(), spdlog::error() and such).

spdlog version 1.8.0 and later

You can obtain the global log level with a call to spdlog::get_level() (which is a freestanding function, not a method).

spdlog versions before 1.8.0

You need to get your hand on the implicit logger object - by callingspdlog::default_logger_raw() (it gets you a pointer.) Now just proceed as in Scenario 1 above.