From 12a3a38bb716734f31913ccc295a8b884a490136 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 5 Apr 2018 20:19:29 +0200
Subject: options/value-traits: add missing pragma once

---
 options/value-traits.hpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'options')

diff --git a/options/value-traits.hpp b/options/value-traits.hpp
index ac5f6e5c..680f138c 100644
--- a/options/value-traits.hpp
+++ b/options/value-traits.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "export.hpp"
 
 #include "slider.hpp"
@@ -12,6 +14,8 @@ namespace detail {
 template<typename t, typename u = t, typename Enable = void>
 struct default_value_traits
 {
+    virtual ~default_value_traits() = default;
+
     using element_type = std::decay_t<t>;
     using value_type = std::decay_t<u>;
 
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