[Chicken-users] Handling Errors

[Bahman Movaqar]

Consider the following simple function:

  (define (foo lis) (cdr lis))

Obviously LIS should neither be an empty list nor a list with only one
element.
What is the recommended way to deal with such constraints? Should I
enforce them by writing conditionals at the beginning of the
function[1]? Or is it conventional to just let the function fail and
catch the error somewhere else (probably in a top-level function)?

[1] This quickly leads to dirty and not-easy-to-read code.

What say you seasoned schemers on this?

-- 
Bahman Movaqar

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