do not use C++17

nlohmann · Nov 18, 2016 · 0e8e9b6 · 0e8e9b6
1 parent d9a7493
commit 0e8e9b6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/json.hpp b/src/json.hpp
@@ -126,7 +126,7 @@ namespace nlohmann
   struct conjunction<B1, Bn...>
       : conditional_t<bool(B1::value), conjunction<Bn...>, B1> {};
 
-  template <class B> struct negation : std::bool_constant<!B::value> {};
+  template <class B> struct negation : std::integral_constant<bool, !B::value> {};
 
   template <class...> struct disjunction : std::false_type {};
   template <class B1> struct disjunction<B1> : B1 {};