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Comment by HarHarVeryFunny | Hacker News Reader

> Rust code, on the other hand, often doesn't look much more elaborate than code I write in much higher level languages

I'm curious to see an example. Could you show something written in Rust, or another "much higher level language" that you think would be messier or more difficult to write in C++ ?

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The enum example in the article

OK, that's an interesting language feature, but I can't say it's something that I've often wanted to do in C++. Of course C++ does have std::variant and std::any, although I'm not really a fan. I'd tend to (and have) just use a class that contains the variants and an enum to track which one, then setters and getters.

event.SetKeyPress(ch);

event.SetMouseButtonPress(pos, but); etc

...

switch (event.type) {

case EvKeyPress: ch = event.GetKeyPress();

Of course the Rust features being used by that Event type are runtime polymorphism and type introspection, so another obvious C++ approach would be just to use a pointer to a virtual based class including the type, then:

switch (event->type) {

case EvKeyPressEvent:

  {

    auto kpe - dynamic_cast<KeyPressEvent*>(event)

    ...

  }

  break;

}

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