3 ;;; Class construction protocol implementation
5 ;;; (c) 2009 Straylight/Edgeware
8 ;;;----- Licensing notice ---------------------------------------------------
10 ;;; This file is part of the Sensible Object Design, an object system for C.
12 ;;; SOD is free software; you can redistribute it and/or modify
13 ;;; it under the terms of the GNU General Public License as published by
14 ;;; the Free Software Foundation; either version 2 of the License, or
15 ;;; (at your option) any later version.
17 ;;; SOD is distributed in the hope that it will be useful,
18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;;; GNU General Public License for more details.
22 ;;; You should have received a copy of the GNU General Public License
23 ;;; along with SOD; if not, write to the Free Software Foundation,
24 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 ;;;--------------------------------------------------------------------------
31 (defmethod shared-initialize :after ((class sod-class) slot-names &key pset)
32 "Specific behaviour for SOD class initialization.
34 Properties inspected are as follows:
36 * `:metaclass' names the metaclass to use. If unspecified, nil is
37 stored, and (unless you intervene later) `guess-metaclass' will be
38 called by `finalize-sod-class' to find a suitable default.
40 * `:nick' provides a nickname for the class. If unspecified, a default
41 (the class's name, forced to lowercase) will be chosen in
44 * `:link' names the chained superclass. If unspecified, this class will
45 be left at the head of its chain."
47 ;; If no nickname, copy the class name. It won't be pretty, though.
48 (default-slot-from-property (class 'nickname slot-names)
50 (string-downcase (slot-value class 'name)))
52 ;; Set the metaclass if the appropriate property has been provided;
53 ;; otherwise leave it unbound for now, and we'll sort out the mess during
55 (default-slot-from-property (class 'metaclass slot-names)
56 (pset :metaclass :id meta (find-sod-class meta)))
58 ;; If no chain-link, then start a new chain here.
59 (default-slot-from-property (class 'chain-link slot-names)
60 (pset :link :id link (find-sod-class link))
63 ;;;--------------------------------------------------------------------------
66 (defmethod make-sod-slot
67 ((class sod-class) name type pset &optional location)
68 (with-default-error-location (location)
69 (let ((slot (make-instance (get-property pset :slot-class :symbol
74 :location (file-location location)
76 (with-slots (slots) class
77 (setf slots (append slots (list slot))))
80 (defmethod shared-initialize :after ((slot sod-slot) slot-names &key pset)
81 "This method does nothing.
83 It only exists so that it isn't an error to provide a `:pset' initarg
84 to (make-instance 'sod-slot ...)."
86 (declare (ignore slot-names pset)))
88 ;;;--------------------------------------------------------------------------
89 ;;; Slot initializers.
91 (defmethod make-sod-instance-initializer
92 ((class sod-class) nick name value-kind value-form pset
94 (with-default-error-location (location)
95 (let* ((slot (find-instance-slot-by-name class nick name))
96 (initializer (make-sod-initializer-using-slot
97 class slot 'sod-instance-initializer
98 value-kind value-form pset
99 (file-location location))))
100 (with-slots (instance-initializers) class
101 (setf instance-initializers
102 (append instance-initializers (list initializer))))
105 (defmethod make-sod-class-initializer
106 ((class sod-class) nick name value-kind value-form pset
108 (with-default-error-location (location)
109 (let* ((slot (find-class-slot-by-name class nick name))
110 (initializer (make-sod-initializer-using-slot
111 class slot 'sod-class-initializer
112 value-kind value-form pset
113 (file-location location))))
114 (with-slots (class-initializers) class
115 (setf class-initializers
116 (append class-initializers (list initializer))))
119 (defmethod make-sod-initializer-using-slot
120 ((class sod-class) (slot sod-slot)
121 init-class value-kind value-form pset location)
122 (make-instance (get-property pset :initializer-class :symbol init-class)
125 :value-kind value-kind
126 :value-form value-form
127 :location (file-location location)
130 (defmethod shared-initialize :after
131 ((init sod-initializer) slot-names &key pset)
132 "This method does nothing.
134 It only exists so that it isn't an error to provide a `:pset' initarg
135 to (make-instance 'sod-initializer ...)."
136 (declare (ignore slot-names pset))
139 ;;;--------------------------------------------------------------------------
142 (defmethod make-sod-message
143 ((class sod-class) name type pset &optional location)
144 (with-default-error-location (location)
145 (let* ((msg-class (or (get-property pset :message-class :symbol)
146 (and (get-property pset :combination :keyword)
147 'aggregating-message)
149 (message (make-instance msg-class
153 :location (file-location location)
155 (with-slots (messages) class
156 (setf messages (append messages (list message))))
159 (defmethod shared-initialize :after
160 ((message sod-message) slot-names &key pset)
161 (declare (ignore slot-names pset))
162 (with-slots ((type %type)) message
163 (check-message-type message type)))
165 (defmethod check-message-type ((message sod-message) (type c-function-type))
168 (defmethod check-message-type ((message sod-message) (type c-type))
169 (error "Messages must have function type, not ~A" type))
171 ;;;--------------------------------------------------------------------------
174 (defmethod make-sod-method
175 ((class sod-class) nick name type body pset &optional location)
176 (with-default-error-location (location)
177 (let* ((message (find-message-by-name class nick name))
178 (method (make-sod-method-using-message message class
180 (file-location location))))
181 (with-slots (methods) class
182 (setf methods (append methods (list method))))
185 (defmethod make-sod-method-using-message
186 ((message sod-message) (class sod-class) type body pset location)
187 (make-instance (or (get-property pset :method-class :symbol)
188 (sod-message-method-class message class pset))
193 :location (file-location location)
196 (defmethod sod-message-method-class
197 ((message sod-message) (class sod-class) pset)
198 (declare (ignore pset))
201 (defmethod shared-initialize :after
202 ((method sod-method) slot-names &key pset)
203 (declare (ignore slot-names pset))
205 ;; Check that the arguments are named if we have a method body.
206 (with-slots (body (type %type)) method
207 (unless (or (not body)
209 (or (eq arg :ellipsis)
211 (c-type-equal-p (argument-type arg)
213 (c-function-arguments type)))
214 (error "Abstract declarators not permitted in method definitions")))
216 ;; Check the method type.
217 (with-slots (message (type %type)) method
218 (check-method-type method message type)))
220 (defmethod check-method-type
221 ((method sod-method) (message sod-message) (type c-type))
222 (error "Methods must have function type, not ~A" type))
224 (defmethod check-method-type
225 ((method sod-method) (message sod-message) (type c-function-type))
226 (with-slots ((msgtype %type)) message
227 (unless (c-type-equal-p (c-type-subtype msgtype)
228 (c-type-subtype type))
229 (error "Method return type ~A doesn't match message ~A"
230 (c-type-subtype msgtype) (c-type-subtype type)))
231 (unless (argument-lists-compatible-p (c-function-arguments msgtype)
232 (c-function-arguments type))
233 (error "Method arguments ~A don't match message ~A" type msgtype))))
235 ;;;----- That's all, folks --------------------------------------------------