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Presentation-types and parameters
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To: clim@BBN.COM
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Subject: Presentation-types and parameters
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From: "Gilles DEFLANDRE - FT.CNET/LAA/EIA/AIA" <deflandr@lannion.cnet.fr>
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Date: 29 Mar 94 16:25:02+0200
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X400-Received: by /PRMD=inria/ADMD=atlas/C=FR/; Relayed; 29 Mar 94 16:25:31+0200
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X400-Received: by /PRMD=CNET/ADMD=ATLAS/C=FR/; Relayed; 29 Mar 94 16:25:02+0200
hi everybody,
I'd like to define my own presentation-types for sets and ordered lists,
with sets inheriting from clim predefined presentation type 'sequence
and lists inheriting from sets.
Let's take the example of sets, I define it like :
(define-presentation-type sets (type) :inherit-from `(sequence ,type))
I also provide the folowing methods :
- presentation-typep and presentation-subtypep with (call-next-method)
- my own present and accept methods
All these methods seem to work properly, but whenever my mouse happen
to pass over such a displayed object, the program crashes with this error:
Error: missing value for argument TYPE
When traced, the program seem to stop when calling :
clim::map-over-presentation-type-supertypes-method
Has amybody had such a problem, and how have you solved it ?
+====================================================================+
| Gilles DEFLANDRE CNET - Lannion A - |
| tel : 96 05 18 20 2, route de Tregastel |
| e-mail : deflandr@lannion.cnet.fr BP 40 |
| gilles.deflandre@lannion.cnet.fr 22301 LANNION Cedex |
+====================================================================+
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