From 325ac9a5b2a1547129b213a72cf311c8e0085e9a Mon Sep 17 00:00:00 2001
From: Christos Choutouridis <hoo2@hoo2.net>
Date: Sun, 27 Sep 2020 20:26:48 +0300
Subject: [PATCH] FIX: C++17 is_swappable import from stl

---
 include/utl/concepts/stl.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/utl/concepts/stl.h b/include/utl/concepts/stl.h
index 8cc7cf5..edde000 100644
--- a/include/utl/concepts/stl.h
+++ b/include/utl/concepts/stl.h
@@ -404,8 +404,10 @@ namespace utl {
       using type = decltype(check<_Tp, _Up>(0));
    };
    #else
-   using is_swappable = std::is_swappable;
-   using is_swappable_with = std::is_swappable_with;
+   template<typename Tp>
+   using is_swappable = std::is_swappable<Tp>;
+   template<typename T, typename U>
+   using is_swappable_with = std::is_swappable_with<T, U>;
    #endif
 
    // != std:: on CommonReference