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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bool.hpp	9747	0644	edit dl rm
cartesian_product.hpp	3860	0644	edit dl rm
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eval.hpp	1798	0644	edit dl rm
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integral_constant.hpp	389	0644	edit dl rm
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lift.hpp	1500	0644	edit dl rm
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zip_shortest.hpp	1604	0644	edit dl rm
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zip_with.hpp	2292	0644	edit dl rm

Edit: /usr/include/boost/hana/eval.hpp (1798B)

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

@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_EVAL_HPP
#define BOOST_HANA_EVAL_HPP

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

#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/detail/wrong.hpp>
#include <boost/hana/functional/id.hpp>

BOOST_HANA_NAMESPACE_BEGIN
    //! @cond
    template <typename Expr>
    constexpr decltype(auto) eval_t::operator()(Expr&& expr) const {
        return eval_impl<typename hana::tag_of<Expr>::type>::apply(
            static_cast<Expr&&>(expr)
        );
    }
    //! @endcond

template <typename T, bool condition>
    struct eval_impl<T, when<condition>> : default_ {
        template <typename Expr>
        static constexpr auto eval_helper(Expr&& expr, int)
            -> decltype(static_cast<Expr&&>(expr)())
        { return static_cast<Expr&&>(expr)(); }

template <typename Expr>
        static constexpr auto eval_helper(Expr&& expr, long)
            -> decltype(static_cast<Expr&&>(expr)(hana::id))
        { return static_cast<Expr&&>(expr)(hana::id); }

template <typename Expr>
        static constexpr auto eval_helper(Expr&&, ...) {
            static_assert(detail::wrong<Expr>{},
            "hana::eval(expr) requires the expression to be a hana::lazy, "
            "a nullary Callable or a unary Callable that may be "
            "called with hana::id");
        }

template <typename Expr>
        static constexpr decltype(auto) apply(Expr&& expr)
        { return eval_helper(static_cast<Expr&&>(expr), int{}); }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_EVAL_HPP

/*! @file Defines `boost::hana::eval`. @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_EVAL_HPP #define BOOST_HANA_EVAL_HPP #include #include #include #include #include BOOST_HANA_NAMESPACE_BEGIN //! @cond template constexpr decltype(auto) eval_t::operator()(Expr&& expr) const { return eval_impl::type>::apply( static_cast(expr) ); } //! @endcond template struct eval_impl> : default_ { template static constexpr auto eval_helper(Expr&& expr, int) -> decltype(static_cast(expr)()) { return static_cast(expr)(); } template static constexpr auto eval_helper(Expr&& expr, long) -> decltype(static_cast(expr)(hana::id)) { return static_cast(expr)(hana::id); } template static constexpr auto eval_helper(Expr&&, ...) { static_assert(detail::wrong{}, "hana::eval(expr) requires the expression to be a hana::lazy, " "a nullary Callable or a unary Callable that may be " "called with hana::id"); } template static constexpr decltype(auto) apply(Expr&& expr) { return eval_helper(static_cast(expr), int{}); } }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_EVAL_HPP