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Re: type checking for arbitrary lisp objects

From: Daniel Colascione
Subject: Re: type checking for arbitrary lisp objects
Date: Fri, 11 Apr 2014 12:12:14 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

On 04/11/2014 12:10 PM, Roland Winkler wrote:
> The function bbdb-check-type performs a type checking for atomic or
> compound lisp objects by comparing these objects against patterns
> that use a syntax kind of similar to the :type keyword used by
> defcustom (but without the extra keywords such as :tag used by
> defcustom).  So a typical pattern is something like the following
>    (vector (or string (const nil))
>            (repeat string)
>            (repeat (vector string (repeat string)
>                            string string))
>            (repeat (cons symbol string))
>            sexp)
> I am just wondering: Am I here reinventing the wheel because
> something similar has been developed already in some other package?
> If not, could this possibly also be useful for other packages (for
> example, for defining predicates used by the safe-local-variable
> property)?

Why not use cl-deftype?

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