-(defun gen-supers (supers)
- (let (subclassp)
- (dolist (x supers)
- (when (member x (list-meta-models))
- (setf subclassp t)))
- (if subclassp
- supers
- (cons 'meta-model-class supers))))
-
-(defmethod %def-meta-model ((base-type t) name supers slots &rest options)
- `(defclass ,name ,(gen-supers supers)
- ()
- (:default-initargs :metadata ',slots :base-type ,base-type)))
-
-
-(defmacro def-meta-model (name supers slots &rest options)
- `(progn
- (when (not (member (quote ,name) *meta-models*))
- (setf *meta-models* (cons (quote ,name) *meta-models*)))
-
- (let ((class ,(%def-meta-model (cadr (or (assoc :base-type options) '(t t))) name supers slots options)))
- class)))
-
-(defgeneric def-base-type-class-expander (base-type model name args))
-
-(defmethod def-base-class-expander ((model t) name args)
- (def-base-type-class-expander (meta-model.base-type model) model name args))
-
-(defmacro def-base-class (name (model) &rest args)
- (let ((i (make-instance model)))
- `(progn
- (eval-when (:compile-toplevel :load-toplevel :execute)
- ,(def-base-class-expander i :clsql name args))
- (defmethod meta-model.metadata ((m ,name))
- ',(meta-model.metadata i)))))
-