FM / hana

/usr/include/boost/hana

Name	Size	Mode	Actions
concept/	-	0755	rm
core/	-	0755	rm
detail/	-	0755	rm
experimental/	-	0755	rm
ext/	-	0755	rm
functional/	-	0755	rm
fwd/	-	0755	rm
accessors.hpp	1513	0644	edit dl rm
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back.hpp	1534	0644	edit dl rm
basic_tuple.hpp	9455	0644	edit dl rm
bool.hpp	9747	0644	edit dl rm
cartesian_product.hpp	3860	0644	edit dl rm
chain.hpp	1488	0644	edit dl rm
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concept.hpp	1301	0644	edit dl rm
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drop_back.hpp	2475	0644	edit dl rm
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drop_front_exactly.hpp	3030	0644	edit dl rm
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functional.hpp	1186	0644	edit dl rm
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integral_constant.hpp	389	0644	edit dl rm
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length.hpp	1554	0644	edit dl rm
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lexicographical_compare.hpp	4344	0644	edit dl rm
lift.hpp	1500	0644	edit dl rm
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none.hpp	1340	0644	edit dl rm
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union.hpp	1030	0644	edit dl rm
unique.hpp	2361	0644	edit dl rm
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version.hpp	2032	0644	edit dl rm
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zero.hpp	2454	0644	edit dl rm
zip.hpp	1462	0644	edit dl rm
zip_shortest.hpp	1604	0644	edit dl rm
zip_shortest_with.hpp	2116	0644	edit dl rm
zip_with.hpp	2292	0644	edit dl rm

Edit: /usr/include/boost/hana/drop_back.hpp (2475B)

/*!
@file
Defines `boost::hana::drop_back`.

@copyright Louis Dionne 2013-2017
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_DROP_BACK_HPP
#define BOOST_HANA_DROP_BACK_HPP

#include <boost/hana/fwd/drop_back.hpp>

#include <boost/hana/at.hpp>
#include <boost/hana/concept/integral_constant.hpp>
#include <boost/hana/concept/sequence.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/core/make.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/length.hpp>

#include <cstddef>
#include <utility>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename Xs, typename N>
    constexpr auto drop_back_t::operator()(Xs&& xs, N const& n) const {
        using S = typename hana::tag_of<Xs>::type;
        using DropBack = BOOST_HANA_DISPATCH_IF(drop_back_impl<S>,
            hana::Sequence<S>::value &&
            hana::IntegralConstant<N>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Sequence<S>::value,
        "hana::drop_back(xs, n) requires 'xs' to be a Sequence");

static_assert(hana::IntegralConstant<N>::value,
        "hana::drop_back(xs, n) requires 'n' to be an IntegralConstant");
    #endif

static_assert(N::value >= 0,
        "hana::drop_back(xs, n) requires 'n' to be non-negative");

return DropBack::apply(static_cast<Xs&&>(xs), n);
    }

template <typename Xs>
    constexpr auto drop_back_t::operator()(Xs&& xs) const {
        return (*this)(static_cast<Xs&&>(xs), hana::size_c<1>);
    }
    //! @endcond

template <typename S, bool condition>
    struct drop_back_impl<S, when<condition>> : default_ {
        template <typename Xs, std::size_t ...n>
        static constexpr auto drop_back_helper(Xs&& xs, std::index_sequence<n...>) {
            return hana::make<S>(hana::at_c<n>(static_cast<Xs&&>(xs))...);
        }

template <typename Xs, typename N>
        static constexpr auto apply(Xs&& xs, N const&) {
            constexpr std::size_t n = N::value;
            constexpr std::size_t len = decltype(hana::length(xs))::value;
            return drop_back_helper(static_cast<Xs&&>(xs),
                                    std::make_index_sequence<(n > len ? 0 : len - n)>{});
        }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_DROP_BACK_HPP

/*! @file Defines `boost::hana::drop_back`. @copyright Louis Dionne 2013-2017 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_DROP_BACK_HPP #define BOOST_HANA_DROP_BACK_HPP #include #include #include #include #include #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr auto drop_back_t::operator()(Xs&& xs, N const& n) const { using S = typename hana::tag_of::type; using DropBack = BOOST_HANA_DISPATCH_IF(drop_back_impl, hana::Sequence::value && hana::IntegralConstant::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Sequence::value, "hana::drop_back(xs, n) requires 'xs' to be a Sequence"); static_assert(hana::IntegralConstant::value, "hana::drop_back(xs, n) requires 'n' to be an IntegralConstant"); #endif static_assert(N::value >= 0, "hana::drop_back(xs, n) requires 'n' to be non-negative"); return DropBack::apply(static_cast(xs), n); } template constexpr auto drop_back_t::operator()(Xs&& xs) const { return (*this)(static_cast(xs), hana::size_c<1>); } //! @endcond template struct drop_back_impl> : default_ { template static constexpr auto drop_back_helper(Xs&& xs, std::index_sequence) { return hana::make(hana::at_c(static_cast(xs))...); } template static constexpr auto apply(Xs&& xs, N const&) { constexpr std::size_t n = N::value; constexpr std::size_t len = decltype(hana::length(xs))::value; return drop_back_helper(static_cast(xs), std::make_index_sequence<(n > len ? 0 : len - n)>{}); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_DROP_BACK_HPP