Scheme pass-by-reference

Question

How can I pass a variable by reference in scheme?

An example of the functionality I want:

(define foo
  (lambda (&x)
    (set! x 5)))

(define y 2)

         


        

Answer 1

See http://community.schemewiki.org/?scheme-faq-language question "Is there a way to emulate call-by-reference?".

In general I think that fights against scheme's functional nature so probably there is a better way to structure the program to make it more scheme-like.