Improve TR assertion error message

2013-09-05 20:10:58 -04:00 · 2013-09-05 20:10:58 -04:00 · 3becf8492b
commit 3becf8492b
parent dbe4594903
1 changed files with 4 additions and 2 deletions
--- a/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/extra-procs.rkt
+++ b/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/extra-procs.rkt
@ -4,10 +4,12 @@
 (define-syntax assert
  (syntax-rules ()
    ((assert v)
-     (or v (error "Assertion failed")))
+     (or v (error (format "Assertion failed on ~v" v))))
    ((assert v pred)
     (let ((val v))
-       (if (pred val) val (error "Assertion failed"))))))
+       (if (pred val)
+           val
+           (error (format "Assertion ~a failed on ~v" pred val)))))))

 (define (defined? v)
  (not (equal? v (letrec ([x x]) x))))