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54 lines
1.6 KiB
Scheme
54 lines
1.6 KiB
Scheme
;;;; -*- scheme -*-
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;;;; continuations.test --- test suite for continutations
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;;;;
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;;;; Copyright (C) 2003 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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(define-module (test-suite test-continuations)
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:use-module (test-suite lib))
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(define (block-reentry body)
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(let ((active #f))
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(dynamic-wind
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(lambda ()
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(if active
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(throw 'no-reentry)))
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(lambda ()
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(set! active #t)
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(body))
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(lambda () #f))))
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(define (catch-tag body)
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(catch #t
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body
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(lambda (tag . args) tag)))
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(define (check-cont)
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(catch-tag
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(lambda ()
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(block-reentry (lambda () (call/cc identity))))))
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(define (dont-crash-please)
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(let ((k (check-cont)))
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(if (procedure? k)
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(k 12)
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k)))
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(with-test-prefix "continuations"
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(pass-if "throwing to a rewound catch context"
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(eq? (dont-crash-please) 'no-reentry)))
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