[eberfreitas]

I don't think so (could be wrong), but it does perform optimistic mutation on your functional code.

There is a talk somewhere where Richard "demos" this.

[hardwaregeek]

yeah that seems cool! I'm a little skeptical of pure functional programming with no escape hatch. I rarely need the escapes in Rust but when I do, I really do.

[bhansconnect]

It isn't "no escape hatch". It is platform dependent escape hatches. A platform can give you full access to mutation and libffi if it wants.