* EIEIO: how to validate a new instance?
@ 2012-08-02 16:29 Raffaele Ricciardi
2012-08-02 15:46 ` David Engster
2012-08-02 16:40 ` Raffaele Ricciardi
0 siblings, 2 replies; 3+ messages in thread
From: Raffaele Ricciardi @ 2012-08-02 16:29 UTC (permalink / raw)
To: help-gnu-emacs
Hello everyone,
I need to create a new EIEIO object, but not all values are acceptable as
initargs. My understanding is that I should use initialize-instance for
checks,
but I can't find the proper incantation to make it work (I even managed
to make
Emacs crash).
Here is a sample code:
(require 'eieio)
(defclass my-class ()
((x :initarg :x
:type string )))
So far, so good. I can instantiate my class:
(setq ^c (my-class "my-class" :x "x"))
Here is one of my attempts at initialize-instance:
(defun initialize-instance ((^c my-class) ^args) nil)
It doesn't work: now I can't instantiate my class anymore:
(setq ^c (my-class "my-class" :x "x"))
Fails with:
> Debugger entered--Lisp error: (invalid-function (lambda ((^y
my-class) ^args)
nil))
> initialize-instance([object my-class "my-class" unbound] (:x "x")) Any
help? Thank you.
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2012-08-02 16:29 EIEIO: how to validate a new instance? Raffaele Ricciardi
2012-08-02 15:46 ` David Engster
2012-08-02 16:40 ` Raffaele Ricciardi
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