Question

I’m working on a BTS C++ code, i faced a command that i don’t know its functionality, i wish anyone here could help me

LOG(INFO) << *cmsrq;

Here what is the function of LOG. it’s not a logarithmic function.

Answer 1

That’s very probably a MACRO that gives you back an object which logs (to console or file) what you pass it through the << operator.

Much like qDebug().

The value “INFO” you see in there indicates that you want to output the *cmsrq value to the information log level.

I can imagine some macro definition like that:

#define LOG( X )  Logging::logger( X )

Where logger() is a static function returning a reference of the logging engine class, initialized with the correct log level.