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[Gcl-devel] Re: setf symbol-function bug ?

From: Camm Maguire
Subject: [Gcl-devel] Re: setf symbol-function bug ?
Date: 12 Nov 2006 15:09:02 -0500
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

Greetings, and thanks!

Robert Boyer <address@hidden> writes:

> It is probably a bug in GCL 2.7.0, in 'setf', that

Agreed, the form below should throw an error:

>   (setf (symbol-function 'foo) '(lambda (x) x))

what you want here is

(setf (symbol-function 'foo) (lambda (x) x))  -- is this acceptable?
functions are not lists anymore in ansi, hence
function-lambda-expression.  I'll try to plug the above hole in fset. 

I had not planned on backward compatibility in this particular regard
-- is that necessary in the cltl1 image?

Would anyone at your site feel comfortable if cvs write access were
granted for the sole purpose of adding ansi-tests illustrating such
bugs to the suite?  This is the easiest way to make sure that fixed
bugs are not reintroduced later.

Take care,

> leaves us in a state where
>   (fboundp 'foo) is T
> but
>   (functionp (symbol-function 'foo)) is NIL.
> In other words, (setf (symbol-function ...) ...) should store a function
> object, as does, for example, 'defun', at least for functions.
> Bob
> -------------------------------------------------------------------------------
> >From the ANSI, on symbol-function:
> If the symbol is not globally defined as either a macro or a special
> operator, and if the symbol is fbound, a function object is returned.

Camm Maguire                                            address@hidden
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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