Provide @immutable attribute for first-class citizens and namespaces?

[Daniel Fitzpatrick]

> « immutable: » can't do the trick ?

Do you mean to extend the immutable keyword instead of adding an 
attribute, or that the immutable keyword, as is, is enough?  I'm 
fine with the former.  The latter is problematic.  Think 
turnabout - would you enjoy having to mark all of your variables 
'mutable' when you wanted them like that?  As it is, that would 
add a ton of declarations to the standard library.


> BTW, this proposal is a bit problematic without a mutable 
> keyword.

I thought about this: I wouldn't be interested in it.  I would be 
interested in a library which provided containers with different 
semantics for atomic mutation.  What Clojure provides is pretty 
spot on:

http://clojure.org/refs
http://clojure.org/agents
http://clojure.org/atoms