remove c++17 dependency

2018-08-11 14:12:41 +02:00
parent 6fa32607d3
commit 7aa34ef9bc
1 changed files with 2 additions and 1 deletions
@@ -88,7 +88,8 @@ public:
        return AccessGuard<T>(this->element_, this->mutex_);
    }

-    template <typename X = T, typename = std::enable_if_t<!std::is_const_v<X>>>
+    template <typename X = T,
+              typename = std::enable_if_t<!std::is_const<X>::value>>
    AccessGuard<const X> accessConst() const
    {
        return AccessGuard<const T>(this->element_, this->mutex_);