Re: [Chicken-users] environments egg

[felix winkelmann]

On 1/26/07, Daishi Kato <address@hidden> wrote:
> Hi
>
> Out of curiosity,
> What's the use of (make-environment #f) ?

Well, to create an empty, non-extendable environment! ;-)

Seriously, not overly useful - but who knows. R5RS has a
"null-environment", too. Note that evaluating these environments
still can make use of syntax, so you can create some sort of
controled evaluation context:

(eval '(lambda (+ - * / ...) ...) <empty-environment>)
 => a function with a fixed set of bindings

I haven't seen many real-world uses of this, though.


cheers,
felix