[r6rs-discuss] Counter-proposal (Re: Proposed features for small Scheme, part 9: modules)
Ray Dillinger
bear at sonic.net
Wed Oct 14 04:37:25 EDT 2009
On Tue, 2009-10-13 at 22:17 -0700, Brian Harvey wrote:
> > Almost every Scheme system worth its salt has some means of encapsulating
> > a set of definitions and expressions and providing controlled visibility
> > to those bindings created in some fashion.
>
> Actually, /every/ Scheme without exception has such a means; it's called
> LAMBDA. See SICP 2.5.1 for example.
I think lambda's not quite right because it provides only nested
scopes.
Firstly there's a nesting depth beyond which I'm uncomfortable.
Secondly there's sometimes a need for a scope visible in places
separated by other places where it's not visible.
Bear
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