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Fix internal errors in error reporting.

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svn: r11836
This commit is contained in:
Sam Tobin-Hochstadt 2008-09-22 18:09:49 +00:00
parent 52b9740042
commit e7a7036a48
1 changed files with 4 additions and 3 deletions
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7
collects/typed-scheme/typecheck/tc-expr-unit.ss
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@ -46,6 +46,7 @@
[else Univ]))
;; do-inst : syntax type -> type
(define (do-inst stx ty)
(define inst (syntax-property stx 'type-inst))
(define (split-last l)
@ -53,16 +54,16 @@
(values all-but (car last-list))))
(cond [(not inst) ty]
[(not (or (Poly? ty) (PolyDots? ty)))
(tc-error/expr #:return (ret (Un)) "Cannot instantiate non-polymorphic type ~a" ty)]
(tc-error/expr #:return (Un) "Cannot instantiate non-polymorphic type ~a" ty)]
[(and (Poly? ty)
(not (= (length (syntax->list inst)) (Poly-n ty))))
(tc-error/expr #:return (ret (Un))
(tc-error/expr #:return (Un)
"Wrong number of type arguments to polymorphic type ~a:~nexpected: ~a~ngot: ~a"
ty (Poly-n ty) (length (syntax->list inst)))]
[(and (PolyDots? ty) (not (>= (length (syntax->list inst)) (sub1 (PolyDots-n ty)))))
;; we can provide 0 arguments for the ... var
(tc-error/expr #:return (ret (Un))
(tc-error/expr #:return (Un)
"Wrong number of type arguments to polymorphic type ~a:~nexpected at least: ~a~ngot: ~a"
ty (sub1 (PolyDots-n ty)) (length (syntax->list inst)))]
[(PolyDots? ty)