From c22490290f6e0ccc0c65428872fd750b6da68536 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Thu, 8 Jun 2023 22:02:34 +0200
Subject: [PATCH] fix: forgot to commit `_quantity_spec_` member added to
 `kind_of`

---
 src/core/include/mp-units/quantity_spec.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/include/mp-units/quantity_spec.h b/src/core/include/mp-units/quantity_spec.h
index e6e3013e..fb32cc99 100644
--- a/src/core/include/mp-units/quantity_spec.h
+++ b/src/core/include/mp-units/quantity_spec.h
@@ -452,9 +452,11 @@ template<detail::QuantitySpecWithNoSpecifiers auto Q>
   requires(get_kind(Q) == Q)
 #ifdef __cpp_explicit_this_parameter
 struct kind_of_<Q> : Q {
+  static constexpr auto _quantity_spec_ = Q;
 };
 #else
 struct kind_of_<Q> : quantity_spec<kind_of_<Q>, Q> {
+  static constexpr auto _quantity_spec_ = Q;
 };
 #endif