callback (not lambda) function example

[timbo100]

@eglimi Thank you very much for this utility. I'm hoping to use it on a C++ application I've been developing.

I often prefer to use callback functions instead of lambda's, if possible.

I would appreciate a C++ (gcc) example that exemplifies the following:

• A C++ class member function that is defined and used for timer callback
• t.add() call that passes the member function, along with one-shot or repeat timeout params
• at least to pending timers.
• for example encapsulate this case in a class that when constructed from main() will create timer as member and add however timing events and each timed event added invokes a different callback that is a member function.

This example will be a good one that I can better understand how to deply. Thanks you

[timbo100]

My environment:
Ubuntu 24.04
gcc 9...11
C++