From 54489a57b2ed9e9742c137c8260bf3a1b98f1bd3 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Wed, 11 May 2022 22:56:58 +0200
Subject: [PATCH] refactor: missing constraints on a return type added

Implementation verification and interface documentation purposes
---
 src/core/include/units/magnitude.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/core/include/units/magnitude.h b/src/core/include/units/magnitude.h
index 4b95c6e4..bf729945 100644
--- a/src/core/include/units/magnitude.h
+++ b/src/core/include/units/magnitude.h
@@ -443,13 +443,13 @@ constexpr auto cbrt(magnitude<BPs...> m)
 // Magnitude product implementation.
 
 // Base cases, for when either (or both) inputs are the identity.
-constexpr auto operator*(magnitude<>, magnitude<>) { return magnitude<>{}; }
-constexpr auto operator*(magnitude<>, Magnitude auto m) { return m; }
-constexpr auto operator*(Magnitude auto m, magnitude<>) { return m; }
+constexpr Magnitude auto operator*(magnitude<>, magnitude<>) { return magnitude<>{}; }
+constexpr Magnitude auto operator*(magnitude<>, Magnitude auto m) { return m; }
+constexpr Magnitude auto operator*(Magnitude auto m, magnitude<>) { return m; }
 
 // Recursive case for the product of any two non-identity Magnitudes.
 template<auto H1, auto... T1, auto H2, auto... T2>
-constexpr auto operator*(magnitude<H1, T1...>, magnitude<H2, T2...>)
+constexpr Magnitude auto operator*(magnitude<H1, T1...>, magnitude<H2, T2...>)
 {
   // Case for when H1 has the smaller base.
   if constexpr (H1.get_base() < H2.get_base()) {