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Comment by pcwalton | Hacker News Reader

Console games frequently use alternate languages, for example UnrealScript, Lua, and JavaScript. Of course, these are interpreted instead of compiled, but I'm told that AOT compilation is not a deal-breaker.

I suspect that any integration would be gradual, with some parts written in C++ and some written in Rust. This is the path we're following with Servo, after all.

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which parts are mostly written in C++?

And what's the use of python in the code base?

https://github.com/mozilla/servo

It is using a lot of external libraries[1], the major one being the spidermonkey javascript engine.

The Python is used for a pile of code generation, although, AIUI, the Servo team are using more and more Rust macros.

[1]: most of these directories contain submodules pointing to Rust wrappers around other libraries: https://github.com/mozilla/servo/tree/master/src/support

[2]: https://github.com/mozilla/servo/tree/master/src/components/...

Which parts of what? Modern game engines? Nearly all of it, minus often gameplay scripting.

In the hypothetical C++/Rust fusion engine? Whatever hasn't been rewritten yet in Rust, and specifically things that interop with other C++ libraries will remain in C++ for longer times.

Edit: Ohh Servo? Similarly, things that haven't been rewritten yet, specifically javascript interpertation/compiliation. AFAIK Servo is focusing on rewriting layout.

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