syntax exn check

dev-elider-3
Matthew Butterick 9 years ago
parent 56777d4ca3
commit 44305eb770

@ -107,21 +107,18 @@
(check-equal? (elseop "+") 'got-arg) (check-equal? (elseop "+") 'got-arg)
(check-equal? (elseop "+" 42) 'got-else) (check-equal? (elseop "+" 42) 'got-else)
;; todo: how to check for syntax error? (check-exn exn:fail:syntax? (λ _ (expand-once #'(br:define-cases #'badelseop
;; `define-cases: else case must be last in: badelseop`
#;(check-exn exn:fail? (λ _ (br:define-cases #'badelseop
[else #''got-else] [else #''got-else]
[#'(_ _arg) #''got-arg]))) [#'(_ _arg) #''got-arg]))))
(br:define-cases f (br:define-cases f
[(_ arg) (add1 arg)] [(_ arg) (add1 arg)]
[(_ arg1 arg2) (+ arg1 arg2)]) [(_ arg1 arg2) (+ arg1 arg2)])
(check-equal? (f 42) 43) (check-equal? (f 42) 43)
(check-equal? (f 42 5) 47)) (check-equal? (f 42 5) 47)
;; todo: error from define-cases not trapped by check-exn (check-exn exn:fail:syntax? (λ _ (expand-once #'(br:define-cases (#'times stx stx2) #'*)))))
;;(check-exn exn:fail:syntax? (λ _ (define-cases (#'times stx stx2) #'*)))
@ -181,8 +178,7 @@
(br:define #'(foo _X) (br:define #'(foo _X)
(with-syntax ([zam +]) (with-syntax ([zam +])
#'(zam _X _X))) (foo 42)) 84) #'(zam _X _X))) (foo 42)) 84)
;; todo: error from define not trapped by check-exn (check-exn exn:fail:syntax? (λ _ (expand-once #'(br:define (#'times stx stx2) #'*))))
#;(check-exn exn:fail:syntax? (λ _ (br:define (#'times stx stx2) #'*)))
(begin (begin
(br:define #'(redefine _id) #'(define _id 42)) (br:define #'(redefine _id) #'(define _id 42))
(redefine zoombar) (redefine zoombar)

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