FM / std

/usr/include/boost/hana/ext/std

Name	Size	Mode	Actions
array.hpp	6306	0644	edit dl rm
integer_sequence.hpp	5292	0644	edit dl rm
integral_constant.hpp	2975	0644	edit dl rm
pair.hpp	2687	0644	edit dl rm
ratio.hpp	5736	0644	edit dl rm
tuple.hpp	6118	0644	edit dl rm
vector.hpp	3907	0644	edit dl rm

Edit: /usr/include/boost/hana/ext/std/ratio.hpp (5736B)

/*!
@file
Adapts `std::ratio` for use with Hana.

@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_EXT_STD_RATIO_HPP
#define BOOST_HANA_EXT_STD_RATIO_HPP

#include <boost/hana/bool.hpp>
#include <boost/hana/concept/integral_constant.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/when.hpp>
#include <boost/hana/fwd/core/to.hpp>
#include <boost/hana/fwd/core/tag_of.hpp>
#include <boost/hana/fwd/div.hpp>
#include <boost/hana/fwd/equal.hpp>
#include <boost/hana/fwd/less.hpp>
#include <boost/hana/fwd/minus.hpp>
#include <boost/hana/fwd/mod.hpp>
#include <boost/hana/fwd/mult.hpp>
#include <boost/hana/fwd/one.hpp>
#include <boost/hana/fwd/plus.hpp>
#include <boost/hana/fwd/zero.hpp>

#include <cstdint>
#include <ratio>
#include <type_traits>

#ifdef BOOST_HANA_DOXYGEN_INVOKED
namespace std {
    //! @ingroup group-ext-std
    //! Adaptation of `std::ratio` for Hana.
    //!
    //!
    //! Modeled concepts
    //! ----------------
    //! 1. `Comparable`\n
    //! `std::ratio`s are compared for equality using `std::ratio_equal`.
    //! @include example/ext/std/ratio/comparable.cpp
    //!
    //! 2. `Orderable`\n
    //! `std::ratio`s are ordered using `std::ratio_less`.
    //! @include example/ext/std/ratio/orderable.cpp
    //!
    //! 3. `Monoid`, `Group`, `Ring`, and `EuclideanRing`\n
    //! `std::ratio`s are added, subtracted, multiplied and divided using
    //! `std::ratio_add`, `std::ratio_subtract`, `std::ratio_multiply` and
    //! `std::ratio_divide`, respectively. Furthermore, the neutral element
    //! for the additive operation is `std::ratio<0, 1>{}`, and the neutral
    //! element for the multiplicative operation is `std::ratio<1, 1>{}`.
    //! @include example/ext/std/ratio/arithmetic.cpp
    template <std::intmax_t Num, std::intmax_t Denom>
    class ratio { };
}
#endif

BOOST_HANA_NAMESPACE_BEGIN
    namespace ext { namespace std { struct ratio_tag; }}

template <std::intmax_t num, std::intmax_t den>
    struct tag_of<std::ratio<num, den>> {
        using type = ext::std::ratio_tag;
    };

//////////////////////////////////////////////////////////////////////////
    // Conversion from IntegralConstants
    //////////////////////////////////////////////////////////////////////////
    template <typename C>
    struct to_impl<ext::std::ratio_tag, C, when<
        hana::IntegralConstant<C>::value
    >> {
        template <typename N>
        static constexpr auto apply(N const&) {
            return std::ratio<N::value>{};
        }
    };

//////////////////////////////////////////////////////////////////////////
    // Comparable
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct equal_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr auto apply(R1 const&, R2 const&)
        { return hana::bool_c<std::ratio_equal<R1, R2>::value>; }
    };

//////////////////////////////////////////////////////////////////////////
    // Orderable
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct less_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr auto apply(R1 const&, R2 const&)
        { return hana::bool_c<std::ratio_less<R1, R2>::value>; }
    };

//////////////////////////////////////////////////////////////////////////
    // Monoid
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct plus_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr std::ratio_add<R1, R2> apply(R1 const&, R2 const&)
        { return {}; }
    };

template <>
    struct zero_impl<ext::std::ratio_tag> {
        static constexpr std::ratio<0> apply()
        { return {}; }
    };

//////////////////////////////////////////////////////////////////////////
    // Group
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct minus_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr std::ratio_subtract<R1, R2> apply(R1 const&, R2 const&)
        { return {}; }
    };

//////////////////////////////////////////////////////////////////////////
    // Ring
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct mult_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr std::ratio_multiply<R1, R2> apply(R1 const&, R2 const&)
        { return {}; }
    };

template <>
    struct one_impl<ext::std::ratio_tag> {
        static constexpr std::ratio<1> apply()
        { return {}; }
    };

//////////////////////////////////////////////////////////////////////////
    // EuclideanRing
    //////////////////////////////////////////////////////////////////////////
    template <>
    struct div_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr std::ratio_divide<R1, R2> apply(R1 const&, R2 const&)
        { return {}; }
    };

template <>
    struct mod_impl<ext::std::ratio_tag, ext::std::ratio_tag> {
        template <typename R1, typename R2>
        static constexpr std::ratio<0> apply(R1 const&, R2 const&)
        { return {}; }
    };
BOOST_HANA_NAMESPACE_END

#endif // !BOOST_HANA_EXT_STD_RATIO_HPP

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