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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at.hpp	1659	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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integral_constant.hpp	389	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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zip_with.hpp	2292	0644	edit dl rm

Edit: /usr/include/boost/hana/at.hpp (1659B)

/*!
@file
Defines `boost::hana::at` and `boost::hana::at_c`.

@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_AT_HPP
#define BOOST_HANA_AT_HPP

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

#include <boost/hana/concept/integral_constant.hpp>
#include <boost/hana/concept/iterable.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/integral_constant.hpp>

#include <cstddef>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename Xs, typename N>
    constexpr decltype(auto) at_t::operator()(Xs&& xs, N const& n) const {
        using It = typename hana::tag_of<Xs>::type;
        using At = BOOST_HANA_DISPATCH_IF(at_impl<It>,
            hana::Iterable<It>::value
        );

#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
        static_assert(hana::Iterable<It>::value,
        "hana::at(xs, n) requires 'xs' to be an Iterable");

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

return At::apply(static_cast<Xs&&>(xs), n);
    }
    //! @endcond

template <typename It, bool condition>
    struct at_impl<It, when<condition>> : default_ {
        template <typename ...Args>
        static constexpr auto apply(Args&& ...) = delete;
    };

template <std::size_t n, typename Xs>
    constexpr decltype(auto) at_c(Xs&& xs) {
        return hana::at(static_cast<Xs&&>(xs), hana::size_t<n>{});
    }
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_AT_HPP

/*! @file Defines `boost::hana::at` and `boost::hana::at_c`. @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_AT_HPP #define BOOST_HANA_AT_HPP #include #include #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr decltype(auto) at_t::operator()(Xs&& xs, N const& n) const { using It = typename hana::tag_of::type; using At = BOOST_HANA_DISPATCH_IF(at_impl, hana::Iterable::value ); #ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS static_assert(hana::Iterable::value, "hana::at(xs, n) requires 'xs' to be an Iterable"); static_assert(hana::IntegralConstant::value, "hana::at(xs, n) requires 'n' to be an IntegralConstant"); #endif return At::apply(static_cast(xs), n); } //! @endcond template struct at_impl> : default_ { template static constexpr auto apply(Args&& ...) = delete; }; template constexpr decltype(auto) at_c(Xs&& xs) { return hana::at(static_cast(xs), hana::size_t{}); } BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_AT_HPP