mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 05:13:04 +03:00
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
|
/*!
|
||
|
|
@file
|
||
|
|
Defines `boost::hana::zip_shortest`.
|
||
|
|
|
||
|
|
@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_ZIP_SHORTEST_HPP
|
||
|
|
#define BOOST_HANA_ZIP_SHORTEST_HPP
|
||
|
|
|
||
|
|
#include <boost/hana/fwd/zip_shortest.hpp>
|
||
|
|
|
||
|
|
#include <boost/hana/concept/sequence.hpp>
|
||
|
|
#include <boost/hana/config.hpp>
|
||
|
|
#include <boost/hana/core/dispatch.hpp>
|
||
|
|
#include <boost/hana/detail/fast_and.hpp>
|
||
|
|
#include <boost/hana/tuple.hpp>
|
||
|
|
#include <boost/hana/zip_shortest_with.hpp>
|
||
|
|
|
||
|
|
|
||
|
|
BOOST_HANA_NAMESPACE_BEGIN
|
||
|
|
//! @cond
|
||
|
|
template <typename Xs, typename ...Ys>
|
||
|
|
constexpr auto zip_shortest_t::operator()(Xs&& xs, Ys&& ...ys) const {
|
||
|
|
#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
|
||
|
|
static_assert(detail::fast_and<
|
||
|
|
hana::Sequence<Xs>::value, hana::Sequence<Ys>::value...
|
||
|
|
>::value,
|
||
|
|
"hana::zip_shortest(xs, ys...) requires 'xs' and 'ys...' to be Sequences");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return zip_shortest_impl<typename hana::tag_of<Xs>::type>::apply(
|
||
|
|
static_cast<Xs&&>(xs),
|
||
|
|
static_cast<Ys&&>(ys)...
|
||
|
|
);
|
||
|
|
}
|
||
|
|
//! @endcond
|
||
|
|
|
||
|
|
template <typename S, bool condition>
|
||
|
|
struct zip_shortest_impl<S, when<condition>> : default_ {
|
||
|
|
template <typename ...Xs>
|
||
|
|
static constexpr decltype(auto) apply(Xs&& ...xs) {
|
||
|
|
return hana::zip_shortest_with(hana::make_tuple,
|
||
|
|
static_cast<Xs&&>(xs)...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
BOOST_HANA_NAMESPACE_END
|
||
|
|
|
||
|
|
#endif // !BOOST_HANA_ZIP_SHORTEST_HPP
|