Re: cheap-list

[Aaron Hill]

On 2020-05-06 7:34 pm, Freeman Gilmore wrote:
> What is a  cheap-list  and where is it explained?
> Thank you, ƒg

There is no such thing as a "cheap list" per se.  cheap-list? is simply 
a faster predicate compared to the standard list?:

;;;; from c++.scm
(define-public (cheap-list? x)
  (or (pair? x) (null? x)))
;;;;

All lists will pass cheap-list?, but not all things that pass 
cheap-list? are lists.  Additional care must be taken within the 
function body when using cheap-list? as a type predicate.


-- Aaron Hill