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