+++ /dev/null
-;;; -*-lisp-*-
-;;;
-;;; Class construction protocol implementation
-;;;
-;;; (c) 2009 Straylight/Edgeware
-;;;
-
-;;;----- Licensing notice ---------------------------------------------------
-;;;
-;;; This file is part of the Sensble Object Design, an object system for C.
-;;;
-;;; SOD is free software; you can redistribute it and/or modify
-;;; it under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 2 of the License, or
-;;; (at your option) any later version.
-;;;
-;;; SOD is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with SOD; if not, write to the Free Software Foundation,
-;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-(cl:in-package #:sod)
-
-;;;--------------------------------------------------------------------------
-;;; Classes.
-
-(defmethod guess-metaclass ((class sod-class))
- "Default metaclass-guessing function for classes.
-
- Return the most specific metaclass of any of the CLASS's direct
- superclasses."
- (do ((supers (sod-class-direct-superclasses class) (cdr supers))
- (meta nil (let ((candidate (sod-class-metaclass (car supers))))
- (cond ((null meta) candidate)
- ((sod-subclass-p meta candidate) meta)
- ((sod-subclass-p candidate meta) candidate)
- (t (error "Unable to choose metaclass for `~A'"
- class))))))
- ((endp supers) meta)))
-
-(defmethod shared-initialize :after ((class sod-class) slot-names &key pset)
- "Specific behaviour for SOD class initialization.
-
- Properties inspected are as follows:
-
- * `:metaclass' names the metaclass to use. If unspecified, nil is
- stored, and (unless you intervene later) `guess-metaclass' will be
- called by `finalize-sod-class' to find a suitable default.
-
- * `:nick' provides a nickname for the class. If unspecified, a default
- (the class's name, forced to lowercase) will be chosen in
- `finalize-sod-class'.
-
- * `:link' names the chained superclass. If unspecified, this class will
- be left at the head of its chain."
-
- ;; If no nickname, copy the class name. It won't be pretty, though.
- (default-slot-from-property (class 'nickname slot-names)
- (pset :nick :id)
- (string-downcase (slot-value class 'name)))
-
- ;; If no metaclass, guess one in a (Lisp) class-specific way.
- (default-slot-from-property (class 'metaclass slot-names)
- (pset :metaclass :id meta (find-sod-class meta))
- (guess-metaclass class))
-
- ;; If no chain-link, then start a new chain here.
- (default-slot-from-property (class 'chain-link slot-names)
- (pset :link :id link (find-sod-class link))
- nil))
-
-;;;--------------------------------------------------------------------------
-;;; Slots.
-
-(defmethod make-sod-slot
- ((class sod-class) name type pset &optional location)
- (with-default-error-location (location)
- (let ((slot (make-instance (get-property pset :lisp-class :symbol
- 'sod-slot)
- :class class
- :name name
- :type type
- :location (file-location location)
- :pset pset)))
- (with-slots (slots) class
- (setf slots (append slots (list slot))))
- (check-unused-properties pset))))
-
-(defmethod shared-initialize :after ((slot sod-slot) slot-names &key pset)
- "This method does nothing.
-
- It only exists so that it isn't an error to provide a `:pset' initarg
- to (make-instance 'sod-slot ...)."
-
- (declare (ignore slot-names pset)))
-
-;;;--------------------------------------------------------------------------
-;;; Slot initializers.
-
-(defmethod make-sod-instance-initializer
- ((class sod-class) nick name value-kind value-form pset
- &optional location)
- (with-default-error-location (location)
- (let* ((slot (find-instance-slot-by-name class nick name))
- (initializer (make-sod-initializer-using-slot
- class slot 'sod-instance-initializer
- value-kind value-form pset
- (file-location location))))
- (with-slots (instance-initializers) class
- (setf instance-initializers
- (append instance-initializers (list initializer))))
- (check-unused-properties pset))))
-
-(defmethod make-sod-class-initializer
- ((class sod-class) nick name value-kind value-form pset
- &optional location)
- (with-default-error-location (location)
- (let* ((slot (find-class-slot-by-name class nick name))
- (initializer (make-sod-initializer-using-slot
- class slot 'sod-class-initializer
- value-kind value-form pset
- (file-location location))))
- (with-slots (class-initializers) class
- (setf class-initializers
- (append class-initializers (list initializer))))
- (check-unused-properties pset))))
-
-(defmethod make-sod-initializer-using-slot
- ((class sod-class) (slot sod-slot)
- init-class value-kind value-form pset location)
- (make-instance (get-property pset :lisp-class :symbol init-class)
- :class class
- :slot slot
- :value-kind value-kind
- :value-form value-form
- :location location
- :pset pset))
-
-(defmethod shared-initialize :after
- ((init sod-initializer) slot-names &key pset)
- "This method does nothing.
-
- It only exists so that it isn't an error to provide a `:pset' initarg
- to (make-instance 'sod-initializer ...)."
- (declare (ignore slot-names pset))
- nil)
-
-;;;--------------------------------------------------------------------------
-;;; Messages.
-
-(defmethod make-sod-message
- ((class sod-class) name type pset &optional location)
- (with-default-error-location (location)
- (let ((message (make-instance (get-property pset :lisp-class :symbol
- 'standard-message)
- :class class
- :name name
- :type type
- :location (file-location location)
- :pset pset)))
- (with-slots (messages) class
- (setf messages (append messages (list message))))
- (check-unused-properties pset))))
-
-(defmethod shared-initialize :after
- ((message sod-message) slot-names &key pset)
- (declare (ignore slot-names pset))
- (with-slots (type) message
- (check-message-type message type)))
-
-(defmethod check-message-type ((message sod-message) (type c-function-type))
- nil)
-
-(defmethod check-message-type ((message sod-message) (type c-type))
- (error "Messages must have function type, not ~A" type))
-
-;;;--------------------------------------------------------------------------
-;;; Methods.
-
-(defmethod make-sod-method
- ((class sod-class) nick name type body pset &optional location)
- (with-default-error-location (location)
- (let* ((message (find-message-by-name class nick name))
- (method (make-sod-method-using-message message class
- type body pset
- (file-location location))))
- (with-slots (methods) class
- (setf methods (append methods (list method)))))
- (check-unused-properties pset)))
-
-(defmethod make-sod-method-using-message
- ((message sod-message) (class sod-class) type body pset location)
- (make-instance (or (get-property pset :lisp-class :symbol)
- (sod-message-method-class message class pset))
- :message message
- :class class
- :type type
- :body body
- :location location
- :pset pset))
-
-(defmethod sod-message-method-class
- ((message sod-message) (class sod-class) pset)
- (declare (ignore pset))
- 'sod-method)
-
-(defmethod shared-initialize :after
- ((method sod-method) slot-names &key pset)
- (declare (ignore slot-names pset))
-
- ;; Check that the arguments are named if we have a method body.
- (with-slots (body type) method
- (unless (or (not body)
- (every #'argument-name (c-function-arguments type)))
- (error "Abstract declarators not permitted in method definitions")))
-
- ;; Check the method type.
- (with-slots (message type) method
- (check-method-type method message type)))
-
-(defmethod check-method-type
- ((method sod-method) (message sod-message) (type c-type))
- (error "Methods must have function type, not ~A" type))
-
-(defmethod check-method-type
- ((method sod-method) (message sod-message) (type c-function-type))
- (with-slots ((msgtype type)) message
- (unless (c-type-equal-p (c-type-subtype msgtype)
- (c-type-subtype type))
- (error "Method return type ~A doesn't match message ~A"
- (c-type-subtype msgtype) (c-type-subtype type)))
- (unless (argument-lists-compatible-p (c-function-arguments msgtype)
- (c-function-arguments type))
- (error "Method arguments ~A don't match message ~A" type msgtype))))
-
-;;;----- That's all, folks --------------------------------------------------
~mdw / sod / blobdiff