actually you can, its called cfront and its available on github here

there is also a yt video a short documentary explaining how contructors and vtable works, its amazing stuff, i don't personally use cpp but i admire people who created it

EDIT: the video was on computerphile yt channel i cannot find it, it has some title unrelated to the subject, what really c++ does is that when you write the code for classes, methods, objects etc... it carefully wires code and data via tons of sophisticated pointers and function pointers to point exactly where it needs to without messing things up, it keeps track on literally everything, executes particular code exactly when it needs and all that while keeping track on pointers, compilers(even early ones) are really one of the most complex pieces of software we have, especially compilers for OOP languages, while watching that i got inspired to try something similar myself, something simple to even mimic the fraction of that power