Stratosphere: Add WrapIpcCommandImpl templating.

stratosphere/loader/include/boost/callable_traits/detail/polyfills/disjunction.hpp

@@ -0,0 +1,31 @@
+/*
+Copyright Barrett Adair 2015-2017
+
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+*/
+
+#ifndef BOOST_CLBL_TRTS_DETAIL_POLYFILLS_DISJUNCTION_HPP
+#define BOOST_CLBL_TRTS_DETAIL_POLYFILLS_DISJUNCTION_HPP
+
+#undef BOOST_CLBL_TRTS_DISJUNCTION
+#define BOOST_CLBL_TRTS_DISJUNCTION(...) \
+    ::boost::callable_traits::detail::disjunction<__VA_ARGS__>
+
+namespace boost { namespace callable_traits { namespace detail {
+
+//polyfill for C++17 std::disjunction
+template<typename...>
+struct disjunction : std::false_type {};
+
+template<typename T>
+struct disjunction<T> : T {};
+
+template<typename T, typename... Ts>
+struct disjunction<T, Ts...>
+    : std::conditional<T::value != false, T, disjunction<Ts...>>::type {};
+
+}}} // namespace boost::callable_traits::detail
+
+#endif // #ifndef BOOST_CLBL_TRTS_DETAIL_POLYFILLS_DISJUNCTION_HPP