Add `SCM_SET_SUBR_GENERIC ()' to replace `SCM_SUBR_GENERIC ()' as an lvalue.
[bpt/guile.git] / oop / goops / old-define-method.scm
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1;;; installed-scm-file
2
6e7d5622 3;;;; Copyright (C) 2001, 2006 Free Software Foundation, Inc.
71d540f7 4;;;;
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5;;;; This library is free software; you can redistribute it and/or
6;;;; modify it under the terms of the GNU Lesser General Public
7;;;; License as published by the Free Software Foundation; either
8;;;; version 2.1 of the License, or (at your option) any later version.
71d540f7 9;;;;
73be1d9e 10;;;; This library is distributed in the hope that it will be useful,
71d540f7 11;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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12;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13;;;; Lesser General Public License for more details.
71d540f7 14;;;;
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15;;;; You should have received a copy of the GNU Lesser General Public
16;;;; License along with this library; if not, write to the Free Software
92205699 17;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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18;;;;
19\f
20
21(define-module (oop goops old-define-method)
22 :use-module (oop goops)
1a179b03 23 :export (define-method)
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24 :no-backtrace
25 )
26
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27(define define-method
28 (procedure->memoizing-macro
29 (lambda (exp env)
30 (let ((name (cadr exp)))
31 (if (and (pair? name)
32 (eq? (car name) 'setter)
33 (pair? (cdr name))
34 (symbol? (cadr name))
35 (null? (cddr name)))
36 (let ((name (cadr name)))
37 (cond ((not (symbol? name))
38 (goops-error "bad method name: ~S" name))
39 ((defined? name env)
40 `(begin
41 ;; *fixme* Temporary hack for the current module system
42 (if (not ,name)
43 (define-accessor ,name))
44 (add-method! (setter ,name) (method ,@(cddr exp)))))
45 (else
46 `(begin
47 (define-accessor ,name)
48 (add-method! (setter ,name) (method ,@(cddr exp)))))))
49 (cond ((not (symbol? name))
50 (goops-error "bad method name: ~S" name))
51 ((defined? name env)
52 `(begin
53 ;; *fixme* Temporary hack for the current module system
54 (if (not ,name)
55 (define-generic ,name))
56 (add-method! ,name (method ,@(cddr exp)))))
57 (else
58 `(begin
59 (define-generic ,name)
60 (add-method! ,name (method ,@(cddr exp)))))))))))