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Unbreak signatures for BSL.

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This commit is contained in:
Mike Sperber 2010-09-17 17:52:43 +02:00
parent 232a580e53
commit 8bc95ace01
1 changed files with 6 additions and 4 deletions
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10
collects/lang/private/teach-module-begin.rkt
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@ -13,6 +13,8 @@
(for-syntax syntax/boundmap)
(for-syntax syntax/kerncase))
(require (for-syntax "firstorder.ss"))
(define-syntax (print-results stx)
(syntax-case stx ()
((_ expr)
@ -46,13 +48,13 @@
(filter (lambda (maybe)
(syntax-case maybe (:)
((: ?id ?cnt)
(identifier? #'id)
(begin
(when (bound-identifier-mapping-get table #'?id (lambda () #f))
(identifier? #'?id)
(let ((real-id (first-order->higher-order #'?id)))
(when (bound-identifier-mapping-get table real-id (lambda () #f))
(raise-syntax-error #f
"Second signature declaraton for the same name."
maybe))
(bound-identifier-mapping-put! table #'?id #'?cnt)
(bound-identifier-mapping-put! table real-id #'?cnt)
#f))
((: ?id)
(raise-syntax-error 'signatures "Signature declaration is missing a signature." maybe))