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submitted 5 months ago by sjmarf@sh.itjust.works to c/programmer_humor@programming.dev

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[-] sonymegadrive@feddit.uk 16 points 5 months ago

C++: Nuh, uh ...

template <typename T>
concept Crackable = requires(T obj) {
    { obj.crack() };
};

auto crack(Crackable auto& nut) {
    nut.crack();
}

[-] Aatube@kbin.melroy.org 2 points 5 months ago* (last edited 5 months ago)

This is dangerous. The object might not have the crack() method, and this bloats the compiled size by a lot if you use it with different types. There's also no reason I can see to use concepts here. The saner way would probably be to use inheritance and objects to mimic Java interfaces.