diff options
Diffstat (limited to 'tests/monads.scm')
| -rw-r--r-- | tests/monads.scm | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/tests/monads.scm b/tests/monads.scm index 82f4b9989c..ac19d33f93 100644 --- a/tests/monads.scm +++ b/tests/monads.scm @@ -166,14 +166,16 @@ (let* ((input (iota 100)) (order '())) (define (frob i) - ;; The side effect here is used to keep track of the order in - ;; which monadic values are bound. - (set! order (cons i order)) - i) + (mlet monad ((foo (return 'foo))) + ;; The side effect here is used to keep track of the order in + ;; which monadic values are bound. Perform the side effect + ;; within a '>>=' so that it is performed when the return + ;; value is actually bound. + (set! order (cons i order)) + (return i))) (and (equal? input - (run (sequence monad - (map (lift1 frob monad) input)))) + (run (sequence monad (map frob input)))) ;; Make sure this is from left to right. (equal? order (reverse input))))) |