Why don't people like lisp?

Thu Oct 23 21:47:36 EDT 2003

On Fri, 24 Oct 2003 01:09:43 +0000, prunesquallor wrote:

> You don't need to CPS convert everything because the backtracking
> continuations are upwards only.

I don't know what are upward continuations but it doesn't seem to be
possible. Assume that during mapcar one lambda returns a choice, and
some further lambda fails. How can macros cause mapcar to go back a few
elements, without reimplementing mapcar? Does Common Lisp support some
restricted kind of continuations?

-- 
   __("<         Marcin Kowalczyk
   \__/       qrczak at knm.org.pl
    ^^     http://qrnik.knm.org.pl/~qrczak/