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// Copyright Daniel Wallin, David Abrahams 2010. Use, modification and
// distribution is subject to the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at


#include <boost/type_traits/is_base_and_derived.hpp>

namespace boost {
namespace parameter {
namespace aux {

struct maybe_base {};

template <class T>
struct is_maybe
  : is_base_and_derived<maybe_base, T>

} // namespace aux
} // namespace parameter
} // namespace boost