not op, but i've done this a couple times both through the python API:

    https://github.com/jcelerier/dynalizer

to automatically generate safe dlopen stubs for runtime dynamic library loading from header files

and through the C++ one (this one is an extremely quick and dirty prototype):

    https://github.com/ossia/score/blob/master/src/plugins/score-plugin-avnd/SourceParser/SourceParser.cpp

to pre-instantiate get<N>(aggregate), for_each(aggregate, f) and other similar functions in https://github.com/celtera/avendish because of how slow it is when done through TMP (doing it that way removed literally dozens of megabytes from my .o and had a positive performance impact even with -O3) ; so I weep a lot when I read that people in the committee object to pack...[indexing]