guile/oop/goops/old-define-method.scm

;;; installed-scm-file

;;;; 	Copyright (C) 2001, 2006 Free Software Foundation, Inc.
;;;; 
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 2.1 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
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;;; 


(define-module (oop goops old-define-method)
  :use-module (oop goops)
  :export (define-method)
  :no-backtrace
  )

(define define-method
  (procedure->memoizing-macro
    (lambda (exp env)
      (let ((name (cadr exp)))
	(if (and (pair? name)
		 (eq? (car name) 'setter)
		 (pair? (cdr name))
		 (symbol? (cadr name))
		 (null? (cddr name)))
	    (let ((name (cadr name)))
	      (cond ((not (symbol? name))
		     (goops-error "bad method name: ~S" name))
		    ((defined? name env)
		     `(begin
			;; *fixme* Temporary hack for the current module system
			(if (not ,name)
			    (define-accessor ,name))
			(add-method! (setter ,name) (method ,@(cddr exp)))))
		    (else
		     `(begin
			(define-accessor ,name)
			(add-method! (setter ,name) (method ,@(cddr exp)))))))
	    (cond ((not (symbol? name))
		   (goops-error "bad method name: ~S" name))
		  ((defined? name env)
		   `(begin
		      ;; *fixme* Temporary hack for the current module system
		      (if (not ,name)
			  (define-generic ,name))
		      (add-method! ,name (method ,@(cddr exp)))))
		  (else
		   `(begin
		      (define-generic ,name)
		      (add-method! ,name (method ,@(cddr exp)))))))))))