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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | ;;; -*- Mode: Lisp; Package: CLIM-INTERNALS -*-
;;; (c) copyright 2001 by
;;; Tim Moore (moore@bricoworks.com)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library 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
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-internals)
(defun setf-name-p (name)
(and (listp name) (eq (car name) 'setf)))
;;; Many implementations complain if a defsetf definition and a setf function
;;; exist for the same place. Time to stop fighting that...
(defun make-setf*-gfn-name (function-name)
(let* ((name-sym (cadr function-name)))
`(setf ,(intern (format nil ".~A-~A."
(symbol-name name-sym)
(symbol-name '#:star))
(symbol-package name-sym)))))
(defmacro defgeneric* (fun-name lambda-list &body options)
"Defines a SETF* generic function. FUN-NAME is a SETF function
name. The last argument is the single argument to the function in a
SETF place form; the other arguments are values collected from the
SETF new value form."
(unless (setf-name-p fun-name)
(error "~S is not a valid name for a SETF* generic function." fun-name))
(let ((setf-name (cadr fun-name))
(args (butlast lambda-list))
(place (car (last lambda-list)))
(gf (make-setf*-gfn-name fun-name)))
`(progn
(defsetf ,setf-name (,place) ,args
`(funcall #',',gf ,,@args ,,place))
(defgeneric ,gf ,lambda-list ,@options))))
(defmacro defmethod* (name &body body)
"Defines a SETF* method. NAME is a SETF function name. Otherwise,
like DEFMETHOD except there must exist a corresponding DEFGENERIC* form."
(unless (setf-name-p name)
(error "~S is not a valid name for a SETF* generic function." name))
`(defmethod ,(make-setf*-gfn-name name) ,@body))
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