Re: [CEDET-devel] oref does not eval 2nd arg

[Hans H. <hhalvors@Princeton.EDU>]

Eric,

Thank you very much for answering -- this is just what I needed.

Best wishes,
Hans

At Sat, 07 Apr 2007 07:39:41 -0400,
Eric M. Ludlam wrote:
> 
> Hi,
> 
>   The second argument to oref is not evaluated just as the variable
> name of setq is not evaluated.  That way symbols that are not
> self-referential, such as just `author' will work w/out quoting.
> 
>   To do what you want, you can use `slot-value' which is the CLOS way
> to do it.  There are also the functions the macros for oref/oset use
> which are `eieio-oset' and `eieio-oref'.  I never documented those
> assuming they were not needed but, in fact, it does keep coming up on
> occasion.
> 
> Good Luck
> Eric
> 
> >>> Hans Halvorson <hhalvors@Princeton.EDU> seems to think that:
> >Suppose we have defined a class called "Item" that has a slot called
> >"author".  Then to return the author of a specific item, say my-item, we
> >can do:
> >
> >(oref my-item :author)
> >
> >But if I do:
> >
> >(let ((foo :author))
> >     (oref my-item foo))
> >
> >then I get 'invalid-slot-name "#<Item >" foo'.  So, it seems that the
> >2nd argument is not being evaluated.  Should this be considered a bug?
> >And if not, how can I work around this feature so that I can use
> >variables in the second argument of oref?
> >
> >Thank you,
> >Hans
> >
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> -- 
>           Eric Ludlam:                 za...@gn..., er...@si...
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