logger.md

Logger

In the following example,

#include "logger.hpp"

INIT_GLOBAL_LOGGER();

...

int main() {
    LOG("hello world, this is main()");
    foo();
    bar();
    logger._info("% % %\n", "hello", 123, 3.14);
}

it will output:

[2022-08-20 16:30:00] test/test_logger.cpp main() - #16 | hello world, this is main()
[2022-08-20 16:30:00] test/test_logger.cpp foo() - #8 | hello, this is foo()
[2022-08-20 16:30:00] test/test_logger.cpp bar() - #12 | hello, this is bar()
[2022-08-20 16:30:00] hello 123 3.14

You can use LOG(msg) to easily output LOG information, or you can use the low-level api _info and % to easily format as you want.

There are several useful macros in the logger.hpp as following:

#define INIT_GLOBAL_LOGGER() decltype(auto) logger = Logger::get_instance()
#define LOG(msg) logger.log(msg, __FILE__, __func__, __LINE__)

The LOG(msg) macro use the virtual method Logger::log(), so you can override it by using your own implementation.