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1a179b03b0
`export-syntax', `re-export' and `re-export-syntax' into the `define-module' form. This is the recommended way of exporting bindings. * srfi-2.scm, srfi-4.scm, srfi-8.scm, srfi-9.scm, srfi-10.scm, srfi-11.scm, srfi-14.scm, srfi-16.scm: Move module the system directives `export', `export-syntax', `re-export' and `re-export-syntax' into the `define-module' form. This is the recommended way of exporting bindings. * goops.scm, goops/active-slot.scm, goops/compile.scm, goops/composite-slot.scm, goops/describe.scm, goops/dispatch.scm, goops/old-define-method.scm, goops/save.scm, goops/util.scm: Move module the system directives `export', `export-syntax', `re-export' and `re-export-syntax' into the `define-module' form. This is the recommended way of exporting bindings. * slib.scm (array-indexes): New procedure. (*features*): Extend. (Probably some of these options should be set elsewhere.) (Thanks to Aubrey Jaffer.) * and-let-star-compat.scm, and-let-star.scm, calling.scm, channel.scm, common-list.scm, debug.scm, debugger.scm, expect.scm, hcons.scm, lineio.scm, ls.scm, mapping.scm, null.scm, optargs.scm, poe.scm, popen.scm, pretty-print.scm, q.scm, r5rs.scm, rdelim.scm, regex.scm, runq.scm, safe-r5rs.scm, safe.scm, session.scm, slib.scm, streams.scm, string-fun.scm, syncase.scm, threads.scm: Move module the system directives `export', `export-syntax', `re-export' and `re-export-syntax' into the `define-module' form. This is the recommended way of exporting bindings.
107 lines
4 KiB
Scheme
107 lines
4 KiB
Scheme
;;; installed-scm-file
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;;;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
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;;;;
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;;;; This program is free software; you can redistribute it and/or modify
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;;;; it under the terms of the GNU General Public License as published by
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;;;; the Free Software Foundation; either version 2, or (at your option)
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;;;; any later version.
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;;;;
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;;;; This program 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
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;;;; GNU General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU General Public License
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;;;; along with this software; see the file COPYING. If not, write to
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;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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;;;; Boston, MA 02111-1307 USA
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;;;;
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;;;; As a special exception, the Free Software Foundation gives permission
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;;;; for additional uses of the text contained in its release of GUILE.
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;;;;
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;;;; The exception is that, if you link the GUILE library with other files
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;;;; to produce an executable, this does not by itself cause the
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;;;; resulting executable to be covered by the GNU General Public License.
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;;;; Your use of that executable is in no way restricted on account of
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;;;; linking the GUILE library code into it.
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;;;;
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;;;; This exception does not however invalidate any other reasons why
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;;;; the executable file might be covered by the GNU General Public License.
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;;;;
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;;;; This exception applies only to the code released by the
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;;;; Free Software Foundation under the name GUILE. If you copy
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;;;; code from other Free Software Foundation releases into a copy of
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;;;; GUILE, as the General Public License permits, the exception does
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;;;; not apply to the code that you add in this way. To avoid misleading
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;;;; anyone as to the status of such modified files, you must delete
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;;;; this exception notice from them.
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;;;;
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;;;; If you write modifications of your own for GUILE, it is your choice
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;;;; whether to permit this exception to apply to your modifications.
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;;;; If you do not wish that, delete this exception notice.
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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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