27 lines
651 B
C++
27 lines
651 B
C++
// Copyright Daniel Wallin, David Abrahams 2010. Use, modification and
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// distribution is subject to the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PARAMETER_IS_MAYBE_050329_HPP
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#define BOOST_PARAMETER_IS_MAYBE_050329_HPP
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#include <boost/type_traits/is_base_and_derived.hpp>
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namespace boost {
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namespace parameter {
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namespace aux {
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struct maybe_base {};
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template <class T>
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struct is_maybe
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: is_base_and_derived<maybe_base, T>
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{};
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} // namespace aux
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} // namespace parameter
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} // namespace boost
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#endif // BOOST_PARAMETER_IS_MAYBE_050329_HPP
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