functional

[grauzone]

Andrei Alexandrescu wrote:
> There's one final nail in the coffin. In wake of concurrency, de jure 
> immutability becomes a necessity, not a useful and desirable de facto 
> convention. Adopting the window dressing but not the essence of FP by a 
> concurrent language evokes to me a scene in the Marx Brothers: an 
> otherwise impeccably-dressed gentleman who forgot to put his pants on.

Language support is not strictly necessary to get the same effects as 
immutable types, as far as multithreading is concerned: small data can 
be copied, and large data can be made read-only by OS syscalls. This 
just had to be in the message passing library. (As a bonus, it isn't 
possible to subvert these mechanisms just by casting.)