41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
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/*!
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@file
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Defines `boost::hana::detail::nested_by`.
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@copyright Louis Dionne 2013-2016
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#ifndef BOOST_HANA_DETAIL_NESTED_BY_HPP
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#define BOOST_HANA_DETAIL_NESTED_BY_HPP
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#include <boost/hana/config.hpp>
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#include <boost/hana/detail/nested_by_fwd.hpp>
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#include <boost/hana/functional/flip.hpp>
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#include <boost/hana/functional/partial.hpp>
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BOOST_HANA_NAMESPACE_BEGIN namespace detail {
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//! @cond
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template <typename Algorithm>
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template <typename Predicate, typename Object>
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constexpr decltype(auto) nested_by_t<Algorithm>::
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operator()(Predicate&& predicate, Object&& object) const {
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return Algorithm{}(static_cast<Object&&>(object),
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static_cast<Predicate&&>(predicate));
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}
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template <typename Algorithm>
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template <typename Predicate>
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constexpr decltype(auto)
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nested_by_t<Algorithm>::operator()(Predicate&& predicate) const {
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return hana::partial(hana::flip(Algorithm{}),
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static_cast<Predicate&&>(predicate));
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}
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//! @endcond
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} BOOST_HANA_NAMESPACE_END
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#endif // !BOOST_HANA_DETAIL_NESTED_BY_HPP
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