Why should I care about EXTENSION comments in additional documentation

Question

By studying additional documentation, some of the classes and functions are commented as "EXTENSION"

for example, for example this , what does it mean "EXTENSION" and why do I need it?

the comment should give some notice, but what does it mean for random students like me?

Answer 1

By looking at what is marked as EXTENSION , I can say that they are objects in boost that are not in the corresponding part of std . boost::thread and its related can mainly be used as a replacement for std::thread ; EXTENSION comments seem to be marked with extra bits that do not have the equivalent of std .