From 0fb821a39291652c59c98fd94aafcd147a58adcb Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Sun, 27 Dec 2020 12:26:40 +0100
Subject: [PATCH] fix: Commutativity no longer required for `operator*`

Resolves #185
---
 src/include/units/quantity.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/include/units/quantity.h b/src/include/units/quantity.h
index 57236ab0..df6fcc25 100644
--- a/src/include/units/quantity.h
+++ b/src/include/units/quantity.h
@@ -258,10 +258,11 @@ public:
 
   template<typename Value>
     requires (!Quantity<Value>) &&
-          invoke_result_convertible_to_<rep, std::multiplies<>, rep, Value>
+          invoke_result_convertible_to_<rep, std::multiplies<>, Value, rep>
   [[nodiscard]] friend constexpr Quantity auto operator*(const Value& v, const quantity& q)
   {
-    return q * v;
+    using ret = quantity<D, U, std::invoke_result_t<std::multiplies<>, Value, rep>>;
+    return ret(v * q.count());
   }
 
   template<typename Value>