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Re: [Paul Graham <paulgraham@yahoo.com>] Re: What is a lightweight language

Matthias Felleisen <matthias@ccs.neu.edu> writes:

> Paul writes: 
>   As in many uses of continuations, you don't actually need
>   call/cc-- you can fake continuations using carefully constructed
>   closures-- but having call/cc makes it cleaner and easier.
> It's not just cleaner and easier, it maintains invariants automatically. If
> your programmer abuses your patterns just a bit, all kind of things can
> happen and you don't even know. 

I'm not sure I understand what you mean here.  I thought that Paul was
suggesting using CPS in lieu of call-with-current-continuation.  I
don't see CPS as being any `dirtier' that call-with-current-continuation.

> As your "scripts" grow into programs, you want this kind of assurance, and
> all kinds of other things. That's what DrScheme's growth path is about.