HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 14f1d9fe MD |
1 | ;;; installed-scm-file |
| 2 | ||
| 6e7d5622 | 3 | ;;;; Copyright (C) 1999, 2001, 2006 Free Software Foundation, Inc. |
| 14f1d9fe | 4 | ;;;; |
| 73be1d9e MV |
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. | |
| 14f1d9fe | 9 | ;;;; |
| 73be1d9e | 10 | ;;;; This library is distributed in the hope that it will be useful, |
| 14f1d9fe | 11 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 73be1d9e MV |
12 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | ;;;; Lesser General Public License for more details. | |
| 14f1d9fe | 14 | ;;;; |
| 73be1d9e MV |
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 |
| 14f1d9fe MD |
18 | ;;;; |
| 19 | \f | |
| 20 | ||
| 21 | ;;;; This software is a derivative work of other copyrighted softwares; the | |
| 22 | ;;;; copyright notices of these softwares are placed in the file COPYRIGHTS | |
| 23 | ;;;; | |
| 24 | ;;;; This file is based upon active-slot.stklos from the STk | |
| 25 | ;;;; distribution by Erick Gallesio <eg@unice.fr>. | |
| 26 | ;;;; | |
| 27 | ||
| 28 | (define-module (oop goops active-slot) | |
| 1a179b03 MD |
29 | :use-module (oop goops internal) |
| 30 | :export (<active-class>)) | |
| 14f1d9fe MD |
31 | |
| 32 | (define-class <active-class> (<class>)) | |
| 33 | ||
| 71d540f7 | 34 | (define-method (compute-get-n-set (class <active-class>) slot) |
| 14f1d9fe MD |
35 | (if (eq? (slot-definition-allocation slot) #:active) |
| 36 | (let* ((index (slot-ref class 'nfields)) | |
| 37 | (name (car slot)) | |
| 38 | (s (cdr slot)) | |
| 39 | (env (class-environment class)) | |
| 40 | (before-ref (get-keyword #:before-slot-ref s #f)) | |
| 41 | (after-ref (get-keyword #:after-slot-ref s #f)) | |
| 42 | (before-set! (get-keyword #:before-slot-set! s #f)) | |
| 43 | (after-set! (get-keyword #:after-slot-set! s #f)) | |
| 44 | (unbound (make-unbound))) | |
| 45 | (slot-set! class 'nfields (+ index 1)) | |
| 46 | (list (lambda (o) | |
| 47 | (if before-ref | |
| 48 | (if (before-ref o) | |
| 49 | (let ((res (%fast-slot-ref o index))) | |
| 50 | (and after-ref (not (eqv? res unbound)) (after-ref o)) | |
| 51 | res) | |
| 52 | (make-unbound)) | |
| 53 | (let ((res (%fast-slot-ref o index))) | |
| 54 | (and after-ref (not (eqv? res unbound)) (after-ref o)) | |
| 55 | res))) | |
| 56 | ||
| 57 | (lambda (o v) | |
| 58 | (if before-set! | |
| 59 | (if (before-set! o v) | |
| 60 | (begin | |
| 61 | (%fast-slot-set! o index v) | |
| 62 | (and after-set! (after-set! o v)))) | |
| 63 | (begin | |
| 64 | (%fast-slot-set! o index v) | |
| 65 | (and after-set! (after-set! o v))))))) | |
| 66 | (next-method))) |