DEFCLASS
supports the :METACLASS
option. Possible values are
STANDARD-CLASS
(the default), STRUCTURE-CLASS
(which creates
structure classes, like DEFSTRUCT
does), and user-defined
meta-classes (see Section 29.3.6.7, “Generic Function CLOS:VALIDATE-SUPERCLASS
”).
It is not required that the superclasses of a class are
defined before the DEFCLASS
form for the class is evaluated.
Use Meta-Object Protocol generic functions CLOS:CLASS-FINALIZED-P
to check whether the
class has been finalized and thus its instances can be created,
and CLOS:FINALIZE-INHERITANCE
to force class finalization.
See also Section 29.3.1, “Macro DEFCLASS
”.
These notes document CLISP version 2.49 | Last modified: 2010-07-07 |