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[Chicken-users] Handling Errors

From: Bahman Movaqar
Subject: [Chicken-users] Handling Errors
Date: Sun, 14 Dec 2014 15:14:59 +0330
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0

Consider the following simple function:

  (define (foo lis) (cdr lis))

Obviously LIS should neither be an empty list nor a list with only one
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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