44 lines
1.6 KiB
Scheme
44 lines
1.6 KiB
Scheme
#!r6rs
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;; Copyright (c) 2009 Derick Eddington. All rights reserved.
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;; Licensed under an MIT-style license. My license is in the file
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;; named LICENSE from the original collection this file is distributed
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;; with. If this file is redistributed with some other collection, my
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;; license must also be included.
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(library (srfi s23 error tricks)
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(export
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SRFI-23-error->R6RS)
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(import
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(rnrs))
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(define-syntax error-wrap
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(lambda (stx)
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(syntax-case stx ()
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((_ ctxt signal expr ...)
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(with-syntax ((e (datum->syntax #'ctxt 'error)))
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#'(let-syntax ((e (identifier-syntax signal)))
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expr ...))))))
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(define (AV who)
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(lambda args (apply assertion-violation who args)))
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(define-syntax SRFI-23-error->R6RS
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(lambda (stx)
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(syntax-case stx ()
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((ctxt ewho expr ...)
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(with-syntax ((e (datum->syntax #'ctxt 'error))
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(d (datum->syntax #'ctxt 'define)))
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#'(let-syntax ((e (identifier-syntax (AV 'ewho)))
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(d (lambda (stx)
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(syntax-case stx ()
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((kw (id . formals) . body)
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(identifier? #'id)
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#'(error-wrap kw (AV 'id)
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(d (id . formals) . body)))
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((kw id . r)
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(identifier? #'id)
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#'(error-wrap kw (AV 'id)
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(d id . r)))))))
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expr ...))))))
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)
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