From 76437a77528ebd038681d31b250f6297d6aa136a Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Mon, 4 Jan 2021 13:55:27 +0100
Subject: [PATCH] fix: unit_tests.cpp compilation fixed for MSVC

---
 test/unit_test/static/unit_test.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/test/unit_test/static/unit_test.cpp b/test/unit_test/static/unit_test.cpp
index cbbff548..be223c56 100644
--- a/test/unit_test/static/unit_test.cpp
+++ b/test/unit_test/static/unit_test.cpp
@@ -43,7 +43,9 @@ struct dim_time : base_dimension<"time", second> {};
 
 struct kelvin : named_unit<kelvin, "K", no_prefix> {};
 
+#if !COMP_MSVC
 static_assert([]<Prefix P>(P) { return !requires { typename prefixed_unit<struct kilokelvin, P, kelvin>; }; }(si::kilo{})); // no prefix allowed
+#endif
 
 struct metre_per_second : unit<metre_per_second> {};
 struct dim_speed : derived_dimension<dim_speed, metre_per_second, units::exponent<dim_length, 1>, units::exponent<dim_time, -1>> {};
@@ -55,7 +57,9 @@ static_assert(compare<downcast<scaled_unit<ratio(yard::ratio.num, yard::ratio.de
 static_assert(compare<downcast<scaled_unit<yard::ratio * ratio(1, 3), metre>>, foot>);
 static_assert(compare<downcast<scaled_unit<kilometre::ratio / hour::ratio, metre_per_second>>, kilometre_per_hour>);
 
+#if !COMP_MSVC
 static_assert([]<ratio R>() { return !requires { typename scaled_unit<R, metre>; }; }.template operator()<ratio(-1, 1)>()); // negative unit ratio
+#endif
 
 static_assert(centimetre::symbol == "cm");
 static_assert(kilometre::symbol == "km");