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* module/ice-9/exceptions.scm (&guile): (default-guile-exception-converter): (guile-common-exceptions): (convert-guile-exception): (&raise-object-wrapper): (make-raise-object-wrapper): (raise-object-wrapper?): (raise-object-wrapper-obj): (raise-object-wrapper-continuation): (raise-exception): (raise-continuable): (with-exception-handler): (exception-printer): (format-exception): (format-simple-exception): (%exception): (guile-syntax-error-converter): (guile-lexical-error-converter): (guile-assertion-failure-converter): (guile-undefined-variable-error-converter): (guile-implementation-restriction-converter): (guile-external-error-converter): (guile-system-error-converter): (guile-exception-converters): (set-guile-exception-converter!): Move here, from (rnrs exceptions). * module/rnrs/exceptions.scm: Re-export bindings from (ice-9 exceptions).
42 lines
1.7 KiB
Scheme
42 lines
1.7 KiB
Scheme
;;; exceptions.scm --- The R6RS exceptions library
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;; Copyright (C) 2010, 2011, 2013 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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(library (rnrs exceptions (6))
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(export guard with-exception-handler raise raise-continuable)
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(import (rnrs base (6))
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(rnrs control (6))
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(rnrs conditions (6))
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(rename (ice-9 exceptions)
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(raise-exception raise)))
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(define-syntax guard0
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(syntax-rules ()
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((_ (variable cond-clause ...) . body)
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(call/cc (lambda (continuation)
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(with-exception-handler
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(lambda (variable)
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(continuation (cond cond-clause ...)))
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(lambda () . body)))))))
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(define-syntax guard
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(syntax-rules (else)
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((_ (variable cond-clause ... . ((else else-clause ...))) . body)
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(guard0 (variable cond-clause ... (else else-clause ...)) . body))
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((_ (variable cond-clause ...) . body)
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(guard0 (variable cond-clause ... (else (raise variable))) . body)))))
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