[nightski]

AAA game engines could greatly benefit from the type systems. The problem is most (if not all to my knowledge) functional languages with advanced type systems require a garbage collector which is not ideal at all in that type of environment. They prefer the more deterministic latency provided by manual memory management.

[seanmcdirmid]

Unity uses C# as its scripting language, Lua is popular as well. These all have GC.

[cgh]

My friends in game dev do not consider Unity to be a AAA game engine, not by a long stretch.

[seanmcdirmid]

Obviously, there are no true Scotsmen. But whatever you think of it, unity is widely used by indies, especially in mobile and VR.

[pjmlp]

So given that, would they consider Unreal to be a AAA game engine?

[nightski]

Generally it's judged by the types of games which have been produced. Since Unreal has had AAA games released using it, then yes I'd say so.

[pjmlp]

So then having a GC isn't an impediment to be a AAA games engine it seems.

[nightski]

I didn't mean to imply that it was. But it's not ideal. I believe it's optional in Unreal too, so I'm not sure if AAA games use that feature.

GC is also a very blanket term. There are many different types. From what I understand the Unreal GC gives you a lot more explicit control over how and when it runs.

Having written OpenGL applications in Haskell (not games) I can say that it has no such feature. It's GC is also vastly different as immutable functional languages generate a LOT more garbage than normal applications (measured in GB/s).

GC is not the impediment. GC as it is currently implemented in the majority (if not all) advanced type system functional languages is.