How to debug procedures in Scheme

Asked Oct 03 '17 at 14:06

Active Oct 03 '17 at 14:25

Viewed 443 times

For example lets say I have the following procedure

(define (delete-adjacent-duplicates lst)
  (fold-right (lambda (elem ret)
                (if (equal? elem (first ret))
                    ret
                    (cons elem ret)))
              (list (last lst))
              lst))

So when I run the above procedure like (delete-adjacent-duplicates '(1 2 3 3 4 4 4 5)) I want to see how it executes at each step. Also I want to setup breakpoints at certain locations so that the breakpoint fires at those particular points How can I achieve that using GNU Scheme(which is what I am using)? I know Dr.Racket provides debug functionalities but I want to use it from Guile

In documentation, it suggests to use trace function in the (ice-9 debug) module. However, that function is deprecated and I don't how to use the newly suggested module (system vm trace) module. Can anyone give a detailed example how I can debug procedures in Scheme?

edited Oct 03 '17 at 14:25

asked Oct 03 '17 at 14:06

xabush

Wouldn't it be better to replace Scheme with Guile and remove the scheme tag? Debugging is implementation dependent so there will be no one solution for one language. – Sylwester Oct 03 '17 at 14:21
You right. I removed the scheme tag – xabush Oct 03 '17 at 14:26
@avidProgrammer AFAIK breakpoints only works at the REPL. – amirouche Nov 03 '17 at 10:18
@amirouche Can you add an answer showing how to use breakpoints in REPL? – xabush Nov 10 '17 at 11:07
I don't know how to use them. – amirouche Nov 10 '17 at 16:34

How to debug procedures in Scheme

0 Answers0