add definition of constexpr static value to avoid linker error

ToruNiina · Jul 8, 2018 · f326334 · f326334
1 parent b1a55b1
commit f326334
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/toml/value.hpp b/toml/value.hpp
@@ -174,6 +174,10 @@ struct value_traits
     constexpr static bool is_toml_type  = detail::is_valid(detail::check_type<T>());
     typedef typename detail::toml_default_type<type_index>::type type;
 };
+template<typename T>
+constexpr value_t value_traits<T>::type_index;
+template<typename T>
+constexpr bool    value_traits<T>::is_toml_type;
 
 class value
 {