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3e2e49650c
* module/srfi/srfi-111.scm: New file. * module/Makefile.am (SRFI_SOURCES): Add srfi/srfi-111.scm. * test-suite/tests/srfi-111.test: New file. * test-suite/Makefile.am (SCM_TESTS): Add tests/srfi-111.test. * doc/ref/srfi-modules.texi (SRFI-111): New node.
37 lines
1.3 KiB
Scheme
37 lines
1.3 KiB
Scheme
;;; srfi-111.scm -- SRFI 111 Boxes
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;; Copyright (C) 2014 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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(define-module (srfi srfi-111)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-9 gnu)
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#:export (box box? unbox set-box!))
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(cond-expand-provide (current-module) '(srfi-111))
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(define-record-type <box>
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(box value)
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box?
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(value unbox set-box!))
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(set-record-type-printer! <box>
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(lambda (box port)
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(display "#<box " port)
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(display (number->string (object-address box) 16) port)
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(display " value: ")
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(write (unbox box) port)
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(display ">" port)))
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