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-rw-r--r--module/language/cps/types.scm8
1 files changed, 5 insertions, 3 deletions
diff --git a/module/language/cps/types.scm b/module/language/cps/types.scm
index 512be4bb2..db4a8c7c8 100644
--- a/module/language/cps/types.scm
+++ b/module/language/cps/types.scm
@@ -1008,10 +1008,12 @@ minimum, and maximum."
(define! result &u64 param param))
(define-type-checker (scm->u64/truncate scm)
- (check-type scm &exact-integer &range-min &range-max))
+ (check-type scm &exact-integer -inf.0 +inf.0))
(define-type-inferrer (scm->u64/truncate scm result)
- (restrict! scm &exact-integer &range-min &range-max)
- (define! result &u64 0 &u64-max))
+ (restrict! scm &exact-integer -inf.0 +inf.0)
+ (if (<= 0 (&min scm) (&max scm) &u64-max)
+ (define! result &u64 (&min scm) (&max scm))
+ (define! result &u64 0 &u64-max)))
(define-type-checker (u64->scm u64)
#t)