I think I have a great solution for our limited callback functionality that is compatible with C++98, but how can I test that? It uses some extensive and unreadable macros and requires __VA_ARGS__, which was only "standardised" in C++99, but most older compiler "just had it".
Anyway, the solution is a header-only file that generates more complex callbacks on the fly, so simply not including the header would keep full compatibility.
My question is, is there any way to test if my code would compile on old compilers? Or should I just merge it, and we will wait for feedback?
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