From 8793aeec23f69bbc7594f13d848ec873c5c24455 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Wed, 19 Oct 2022 13:16:10 +0200
Subject: [PATCH] feat: convertibility check added for the target unit in the
 `system_reference`

---
 src/core/include/units/reference.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/core/include/units/reference.h b/src/core/include/units/reference.h
index 992a4df7..eaa8c65b 100644
--- a/src/core/include/units/reference.h
+++ b/src/core/include/units/reference.h
@@ -155,8 +155,7 @@ struct system_reference {
   static constexpr auto coherent_unit = CoU;
 
   template<Unit U>
-  // TODO enable that
-  // requires(convertible(coherent_unit, U{}))
+    requires(convertible(coherent_unit, U{}))
   [[nodiscard]] constexpr reference<std::remove_const_t<decltype(dimension)>, U> operator[](U) const
   {
     return {};