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Re: Chained Object Type Predicates
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From: |
Lennart Borgman |
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Subject: |
Re: Chained Object Type Predicates |
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Date: |
Mon, 8 Jun 2009 15:36:34 +0200 |
On Mon, Jun 8, 2009 at 2:39 PM, Nordlöw<per.nordlow@gmail.com> wrote:
> How should i implement chained type predicate functions, for example
>
> (defun list-of-numbers-p (object) (and (listp object) ...))
>
> should return t if object is of type list (listp) and its elements in
> turn all are of type string (stringp) otherwise nil.
Maybe there is something special implemented for it, but otherwise
just loop over the list and jump out with catch/throw.