28 lines
764 B
Scheme
28 lines
764 B
Scheme
#lang scheme/base
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(provide define-provide-syntax)
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(require (for-syntax scheme/base
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scheme/provide-transform))
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(define-for-syntax (make-provide-macro cert proc)
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(make-provide-transformer
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(lambda (stx modes)
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(let* ([i (make-syntax-introducer)]
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[new-stx (cert (i (proc (i stx))) i)])
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(expand-export new-stx modes)))))
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(define-syntax (define-provide-syntax stx)
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(syntax-case stx ()
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[(_ id proc)
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(identifier? #'id)
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(syntax/loc stx
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(define-syntax id
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(let ([cert (syntax-local-provide-certifier)])
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(make-provide-macro cert proc))))]
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[(_ (id . args) . body)
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(identifier? #'id)
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(syntax/loc stx
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(define-provide-syntax id
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(lambda args . body)))]))
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