// Copyright Cromwell D. Enage 2019.
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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_AUX_ALWAYS_TRUE_PREDICATE_HPP
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#define BOOST_PARAMETER_AUX_ALWAYS_TRUE_PREDICATE_HPP
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#include <boost/parameter/config.hpp>
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#include <boost/mpl/bool.hpp>
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#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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#include <boost/mp11/integral.hpp>
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#endif
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#else
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#include <boost/mpl/always.hpp>
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#endif
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namespace boost { namespace parameter { namespace aux {
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#if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING)
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struct always_true_predicate
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{
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template <typename ...>
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struct apply
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{
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typedef ::boost::mpl::true_ type;
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};
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#if defined(BOOST_PARAMETER_CAN_USE_MP11)
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template <typename ...>
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using fn = ::boost::mp11::mp_true;
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#endif
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};
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#else
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typedef ::boost::mpl::always< ::boost::mpl::true_> always_true_predicate;
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#endif // BOOST_NO_CXX11_VARIADIC_TEMPLATES
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}}} // namespace boost::parameter::aux
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#endif // include guard
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