From 5914ae226058b43d2e6969fbbe14c071bd85f4a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johel=20Ernesto=20Guerrero=20Pe=C3=B1a?=
 <johelegp@gmail.com>
Date: Thu, 18 Mar 2021 17:22:46 -0400
Subject: [PATCH] docs(src): expand on non-allowed syntaxes

---
 src/core/include/units/reference.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/include/units/reference.h b/src/core/include/units/reference.h
index 89afef24..53c2476c 100644
--- a/src/core/include/units/reference.h
+++ b/src/core/include/units/reference.h
@@ -86,6 +86,7 @@ using reference_divide = detail::reference_divide_impl<
  * @endcode
  * 
  * `km * 3` or `s / 4` syntax is not allowed for quantity creation.
+ * Neither is `70 * km / h`, but `70 * (km / h)` is.
  */
 template<Dimension D, UnitOf<D> U>
 struct reference {