Should we have lets?

[andymcn]

We currently have var and let variables and fields, the only difference being that once setup a let cannot be reassigned to. This gives a small amount of extra type checking, if the programmer chooses to use it.

Is this worth having or should we remove it?

Personally I'm currently thinking no.

[sblessing]

I am sure that there could be some optimizations being made if there would be let-fields. From a programmers perspective, I would say its unnecessary and therefore I am personally currently your opinion!!

[sylvanc]

These turn out to be very useful to the programmer, allow certain optimisations, and are particularly useful for certain forms of publicly accessible fields. We'll keep let.