34 lines
1.3 KiB
Scheme
34 lines
1.3 KiB
Scheme
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Mes.
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;;;
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;;; Mes is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Mes is distributed in the hope that it will be useful, but
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;;; 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 Mes. If not, see <http://www.gnu.org/licenses/>.
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(define (foo x pair?)
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(core:display "foo x=") (core:display x) (core:display "\n")
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(core:display " pair?=") (core:display pair?) (core:display "\n")
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(if pair? ((lambda (a d)
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(cons a d))
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(begin
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(core:display "BEFORE x=") (core:display x) (core:display "\n")
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(foo (car x) #f))
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(begin
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(core:display "EFTER x=") (core:display x) (core:display "\n")
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(foo (cdr x) #f)))
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x))
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(if (null? (cdr (foo '(42) #t))) (exit 0))
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(exit 1)
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