Joeish W <joeish80...@yahoo.com> writes:
[SKIPPED CODE]
>
> When I run (defparameter a (%scalar 1d0 2d0 3d0 4d0)) and (mem-aref a
> :double) I still get:
>
> The value #<CV-SCALAR {10046BC833}>
> is not of type
> SB-SYS:SYSTEM-AREA-POINTER.
>
> but when I run (mem-aref (c-pointer a) :double) it works.
>
> What do I have to change in my types so I can mem-aref "A" normally, like
> this
>
> (mem-aref a :double)...Any help is much appreciated:)
Did you read the tutorial and the CFFI manual?
To be short, you should only use the mem-aref in lowlevel code and in
that case you are better of using the (mem-aref (c-pointer ...))
construct.
However if you want to expose the members of the C++ class instance you
should lookup the defcstruct documentation in the CFFI manual.
Wim Oudshoorn
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