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-rw-r--r--src/js/fromjs.nim3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/js/fromjs.nim b/src/js/fromjs.nim
index ccf8abcb..055ae19e 100644
--- a/src/js/fromjs.nim
+++ b/src/js/fromjs.nim
@@ -98,6 +98,9 @@ func fromJSInt[T: SomeInteger](ctx: JSContext; val: JSValue):
     if JS_ToUint32(ctx, addr ret, val) < 0:
       return err()
     return ok(ret)
+  else:
+    static:
+      error($T & " cannot be converted to JS automatically")
 
 proc fromJSFloat64(ctx: JSContext; val: JSValue): JSResult[float64] =
   var f64: float64