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53befeb700
(Not quite finished, the following will be done tomorrow. module/srfi/*.scm module/rnrs/*.scm module/scripts/*.scm testsuite/*.scm guile-readline/* )
82 lines
2.7 KiB
Scheme
82 lines
2.7 KiB
Scheme
;;; installed-scm-file
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;;;; Copyright (C) 1999, 2000, 2001, 2006 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;;;
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;;;; This software is a derivative work of other copyrighted softwares; the
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;;;; copyright notices of these softwares are placed in the file COPYRIGHTS
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;;;;
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;;;; This file is based upon composite-slot.stklos from the STk
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;;;; distribution by Erick Gallesio <eg@unice.fr>.
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;;;;
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(define-module (oop goops composite-slot)
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:use-module (oop goops)
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:export (<composite-class>))
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;;;
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;;; (define-class CLASS SUPERS
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;;; ...
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;;; (OBJECT ...)
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;;; ...
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;;; (SLOT #:allocation #:propagated
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;;; #:propagate-to '(PROPAGATION ...))
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;;; ...
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;;; #:metaclass <composite-class>)
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;;;
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;;; PROPAGATION ::= OBJECT | (OBJECT TARGETSLOT)
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;;;
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;;; The slot SLOT will be propagated to the slot TARGETSLOT in the object
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;;; stored in slot OBJECT. If TARGETSLOT is omitted, assume that the target
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;;; slot is named SLOT.
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;;;
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(define-class <composite-class> (<class>))
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(define-method (compute-get-n-set (class <composite-class>) slot)
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(if (eq? (slot-definition-allocation slot) #:propagated)
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(compute-propagated-get-n-set slot)
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(next-method)))
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(define (compute-propagated-get-n-set s)
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(let ((prop (get-keyword #:propagate-to (cdr s) #f))
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(s-name (slot-definition-name s)))
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(if (not prop)
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(goops-error "Propagation not specified for slot ~S" s-name))
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(if (not (pair? prop))
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(goops-error "Bad propagation list for slot ~S" s-name))
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(let ((objects (map (lambda (p) (if (pair? p) (car p) p)) prop))
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(slots (map (lambda (p) (if (pair? p) (cadr p) s-name)) prop)))
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(let ((first-object (car objects))
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(first-slot (car slots)))
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(list
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;; The getter
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(lambda (o)
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(slot-ref (slot-ref o first-object) first-slot))
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;; The setter
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(if (null? (cdr objects))
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(lambda (o v)
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(slot-set! (slot-ref o first-object) first-slot v))
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(lambda (o v)
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(for-each (lambda (object slot)
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(slot-set! (slot-ref o object) slot v))
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objects
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slots))))))))
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