[pjmlp]

We used to have books about it, and stuff like COM, SOM, CORBA also support C, which is exactly what you're referring to.

Regarding books, here is one from 1993, https://www.mclibre.org/descargar/docs/libros/ooc-ats.pdf

[thesuperbigfrog]

Links to Axel-Tobias Schreiner's books:

https://www.cs.rit.edu/~ats/books/

"Object-Oriented Programming with ANSI-C" (English):

https://www.cs.rit.edu/~ats/books/ooc.pdf

"Objekt-orientierte Programmierung mit ANSI-C" (German):

https://www.cs.rit.edu/~ats/books/ooc_de.pdf

[vkazanov]

Classic..!

I wonder how it feels now, 20 years after reading it for the first time. I remember how revelatory it felt.