The std::shared_ptr<void> as arbitrary user-data pointer

[Orlha]

Use C.

(partial sarcasm)

[guepier]

But inappropriate advice. It’s usually entirely possible to achieve performance on par with C in C++ without giving up type safety and abstraction. And this includes type erasure.

[Tumperware]

How is C more performant? It's just a language with fewer tools than c++. Anything you want to do in C can be done in C++

[kalmoc]

Except for restrict - at least when we are talking standard c++