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+#ifndef BOOST_MP11_INTEGRAL_HPP_INCLUDED
+#define BOOST_MP11_INTEGRAL_HPP_INCLUDED
+
+// Copyright 2015 Peter Dimov.
+//
+// Distributed under the Boost Software License, Version 1.0.
+//
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+#include <type_traits>
+#include <cstddef>
+
+namespace boost
+{
+namespace mp11
+{
+
+// mp_bool
+template<bool B> using mp_bool = std::integral_constant<bool, B>;
+
+using mp_true = mp_bool<true>;
+using mp_false = mp_bool<false>;
+
+// mp_to_bool
+template<class T> using mp_to_bool = mp_bool<static_cast<bool>( T::value )>;
+
+// mp_not<T>
+template<class T> using mp_not = mp_bool< !T::value >;
+
+// mp_int
+template<int I> using mp_int = std::integral_constant<int, I>;
+
+// mp_size_t
+template<std::size_t N> using mp_size_t = std::integral_constant<std::size_t, N>;
+
+} // namespace mp11
+} // namespace boost
+
+#endif // #ifndef BOOST_MP11_INTEGRAL_HPP_INCLUDED