;;; -*-lisp-*-
;;;
-;;; $Id$
-;;;
;;; Useful bits of MOP hacking
;;;
;;; (c) 2006 Straylight/Edgeware
(:use #:common-lisp #:mdw.base
#+(or cmu clisp) #:mop
#+sbcl #:sb-mop
- #+ecl #:clos)
- (:export #:copy-instance #:copy-instance-using-class
- #:with-slot-variables
- #:compatible-class
- #:initargs-for-effective-slot #:make-effective-slot
- #:filtered-slot-class-mixin
- #:filtered-direct-slot-definition
- #:filtered-effective-slot-definition
- #:predicate-class-mixin
- #:abstract-class-mixin #:instantiate-abstract-class
- #:singleton-class-mixin
- #:mdw-class #:abstract-class #:singleton-class
- #:print-object-with-slots))
+ #+ecl #:clos))
(in-package #:mdw.mop)
;;;--------------------------------------------------------------------------
;;; Copying instances.
+(export 'copy-instance-using-class)
(defgeneric copy-instance-using-class (class object &rest initargs)
(:documentation
"Does the donkey-work behind copy-instance."))
(apply #'shared-initialize new nil initargs)
new))
+(export 'copy-instance)
(defun copy-instance (object &rest initargs)
"Make a copy of OBJECT, modifying it by setting slots as requested by
INITARGS."
;;;--------------------------------------------------------------------------
;;; Handy macros.
+(export 'with-slot-variables)
(defmacro with-slot-variables (slots instance &body body)
"A copy-out-and-write-back variant of with-slots.
;;;--------------------------------------------------------------------------
;;; Basic stuff.
+(export 'compatible-class)
(defclass compatible-class (standard-class)
()
(:documentation
;;;--------------------------------------------------------------------------
;;; Utilities for messing with slot options.
+(export 'initargs-for-effective-slot)
(defgeneric initargs-for-effective-slot (class direct-slots)
(:documentation
"Missing functionality from the MOP: given a class and its direct slots
direct-slots)))
:allocation (slot-definition-allocation (car direct-slots)))))
+(export 'make-effective-slot)
(defun make-effective-slot (class initargs)
- "Construct an effectie slot definition for a slot on the class, given the
+ "Construct an effective slot definition for a slot on the class, given the
required arguments."
(apply #'make-instance
(apply #'effective-slot-definition-class class initargs)
;;;--------------------------------------------------------------------------
;;; Filterered slots.
+(export 'filtered-slot-class-mixin)
(defclass filtered-slot-class-mixin (compatible-class)
()
(:documentation
(defgeneric slot-definition-filter (slot)
(:method ((slot slot-definition)) nil))
+(export 'filtered-direct-slot-definition)
(defclass filtered-direct-slot-definition
(standard-direct-slot-definition)
((filter :initarg :filter :reader slot-definition-filter)))
+(export 'filtered-effective-slot-definition)
(defclass filtered-effective-slot-definition
(standard-effective-slot-definition)
((filter :initarg :filter :accessor slot-definition-filter)))
;;;--------------------------------------------------------------------------
;;; Predicates.
+(export 'predicate-class-mixin)
(defclass predicate-class-mixin (compatible-class)
((predicates :type list :initarg :predicate :initform nil
:documentation "Predicate generic function to create."))
;;;--------------------------------------------------------------------------
;;; Abstract classes.
+(export 'abstract-class-mixin)
(defclass abstract-class-mixin (compatible-class)
()
(:documentation
"Confusingly enough, a concrete metaclass for abstract classes. This
class has a `make-instance' implementation which signals an error."))
+(export '(instantiate-abstract-class instantiate-abstract-class-class))
(define-condition instantiate-abstract-class (error)
((class :reader instantiate-abstract-class-class :initarg :class
:documentation "The class someone attempted to instantiate."))
;;;--------------------------------------------------------------------------
;;; Singleton classes.
+(export 'singleton-class-mixin)
(defclass singleton-class-mixin (compatible-class)
((instance :initform nil :type (or null standard-object)))
(:documentation
;;;--------------------------------------------------------------------------
;;; Useful classes.
+(export 'mdw-class)
(defclass mdw-class (filtered-slot-class-mixin
predicate-class-mixin
compatible-class)
metaclass for all your classes if you don't use any of its fancy
features."))
+(export 'abstract-class)
(defclass abstract-class (mdw-class abstract-class-mixin) ())
+
+(export 'singleton-class)
(defclass singleton-class (mdw-class singleton-class-mixin) ())
;;;--------------------------------------------------------------------------
;;; Printing things.
+(export 'print-object-with-slots)
(defun print-object-with-slots (obj stream)
"Prints objects in a pleasant way. Not too clever about circularity."
(let ((class (class-of obj))
~mdw / lisp / blobdiff