| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2016-2019 Damian Jarek (damian dot jarek93 at gmail dot com) | ||
| 3 | // Copyright (c) 2022 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 4 | // | ||
| 5 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 6 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 7 | // | ||
| 8 | // Official repository: https://github.com/boostorg/beast | ||
| 9 | // | ||
| 10 | |||
| 11 | #ifndef BOOST_URL_GRAMMAR_DETAIL_TUPLE_HPP | ||
| 12 | #define BOOST_URL_GRAMMAR_DETAIL_TUPLE_HPP | ||
| 13 | |||
| 14 | #include <boost/url/detail/config.hpp> | ||
| 15 | #include <boost/url/error_types.hpp> | ||
| 16 | #include <boost/core/empty_value.hpp> | ||
| 17 | #include <boost/mp11/algorithm.hpp> | ||
| 18 | #include <boost/mp11/function.hpp> | ||
| 19 | #include <boost/mp11/integer_sequence.hpp> | ||
| 20 | #include <boost/type_traits/remove_cv.hpp> | ||
| 21 | #include <boost/type_traits/copy_cv.hpp> | ||
| 22 | #include <cstdlib> | ||
| 23 | #include <utility> | ||
| 24 | |||
| 25 | #ifndef BOOST_URL_TUPLE_EBO | ||
| 26 | // VFALCO No idea what causes it or how to fix it | ||
| 27 | // https://devblogs.microsoft.com/cppblog/optimizing-the-layout-of-empty-base-classes-in-vs2015-update-2-3/ | ||
| 28 | #ifdef BOOST_MSVC | ||
| 29 | #define BOOST_URL_TUPLE_EBO 0 | ||
| 30 | #else | ||
| 31 | #define BOOST_URL_TUPLE_EBO 1 | ||
| 32 | #endif | ||
| 33 | #endif | ||
| 34 | |||
| 35 | namespace boost { | ||
| 36 | namespace urls { | ||
| 37 | namespace grammar { | ||
| 38 | namespace detail { | ||
| 39 | |||
| 40 | #if BOOST_URL_TUPLE_EBO | ||
| 41 | template<std::size_t I, class T> | ||
| 42 | struct tuple_element_impl | ||
| 43 | : empty_value<T> | ||
| 44 | { | ||
| 45 | constexpr | ||
| 46 | 59762 | tuple_element_impl(T const& t) | |
| 47 | : empty_value<T>( | ||
| 48 | 59762 | empty_init, t) | |
| 49 | { | ||
| 50 | 59762 | } | |
| 51 | |||
| 52 | constexpr | ||
| 53 | tuple_element_impl(T&& t) | ||
| 54 | : empty_value<T>( | ||
| 55 | empty_init, | ||
| 56 | std::move(t)) | ||
| 57 | { | ||
| 58 | } | ||
| 59 | }; | ||
| 60 | #else | ||
| 61 | template<std::size_t I, class T> | ||
| 62 | struct tuple_element_impl | ||
| 63 | { | ||
| 64 | T t_; | ||
| 65 | |||
| 66 | constexpr | ||
| 67 | tuple_element_impl(T const& t) | ||
| 68 | : t_(t) | ||
| 69 | { | ||
| 70 | } | ||
| 71 | |||
| 72 | constexpr | ||
| 73 | tuple_element_impl(T&& t) | ||
| 74 | : t_(std::move(t)) | ||
| 75 | { | ||
| 76 | } | ||
| 77 | |||
| 78 | constexpr | ||
| 79 | T& | ||
| 80 | get() noexcept | ||
| 81 | { | ||
| 82 | return t_; | ||
| 83 | } | ||
| 84 | |||
| 85 | constexpr | ||
| 86 | T const& | ||
| 87 | get() const noexcept | ||
| 88 | { | ||
| 89 | return t_; | ||
| 90 | } | ||
| 91 | }; | ||
| 92 | #endif | ||
| 93 | |||
| 94 | template<std::size_t I, class T> | ||
| 95 | struct tuple_element_impl<I, T&> | ||
| 96 | { | ||
| 97 | T& t; | ||
| 98 | |||
| 99 | constexpr | ||
| 100 | tuple_element_impl(T& t_) | ||
| 101 | : t(t_) | ||
| 102 | { | ||
| 103 | } | ||
| 104 | |||
| 105 | T& | ||
| 106 | get() const noexcept | ||
| 107 | { | ||
| 108 | return t; | ||
| 109 | } | ||
| 110 | }; | ||
| 111 | |||
| 112 | template<class... Ts> | ||
| 113 | struct tuple_impl; | ||
| 114 | |||
| 115 | template<class... Ts, std::size_t... Is> | ||
| 116 | struct tuple_impl< | ||
| 117 | mp11::index_sequence<Is...>, Ts...> | ||
| 118 | : tuple_element_impl<Is, Ts>... | ||
| 119 | { | ||
| 120 | template<class... Us> | ||
| 121 | constexpr | ||
| 122 | explicit | ||
| 123 | 10847 | tuple_impl(Us&&... us) | |
| 124 | : tuple_element_impl<Is, Ts>( | ||
| 125 | 10847 | std::forward<Us>(us))... | |
| 126 | { | ||
| 127 | 10847 | } | |
| 128 | }; | ||
| 129 | |||
| 130 | template<class... Ts> | ||
| 131 | struct tuple | ||
| 132 | : tuple_impl< | ||
| 133 | mp11::index_sequence_for<Ts...>, Ts...> | ||
| 134 | { | ||
| 135 | template<class... Us, | ||
| 136 | typename std::enable_if< | ||
| 137 | mp11::mp_bool< | ||
| 138 | mp11::mp_all<std::is_constructible< | ||
| 139 | Ts, Us>...>::value && | ||
| 140 | ! mp11::mp_all<std::is_convertible< | ||
| 141 | Us, Ts>...>::value>::value, | ||
| 142 | int>::type = 0 | ||
| 143 | > | ||
| 144 | constexpr | ||
| 145 | explicit | ||
| 146 | tuple(Us&&... us) noexcept | ||
| 147 | : tuple_impl<mp11::index_sequence_for< | ||
| 148 | Ts...>, Ts...>{std::forward<Us>(us)...} | ||
| 149 | { | ||
| 150 | } | ||
| 151 | |||
| 152 | template<class... Us, | ||
| 153 | typename std::enable_if< | ||
| 154 | mp11::mp_all<std::is_convertible< | ||
| 155 | Us, Ts>...>::value, | ||
| 156 | int>::type = 0 | ||
| 157 | > | ||
| 158 | constexpr | ||
| 159 | 10847 | tuple(Us&&... us) noexcept | |
| 160 | : tuple_impl<mp11::index_sequence_for< | ||
| 161 | 10847 | Ts...>, Ts...>{std::forward<Us>(us)...} | |
| 162 | { | ||
| 163 | 10847 | } | |
| 164 | }; | ||
| 165 | |||
| 166 | //------------------------------------------------ | ||
| 167 | |||
| 168 | template<std::size_t I, class T> | ||
| 169 | constexpr | ||
| 170 | T& | ||
| 171 | get(tuple_element_impl<I, T>& te) | ||
| 172 | { | ||
| 173 | return te.get(); | ||
| 174 | } | ||
| 175 | |||
| 176 | template<std::size_t I, class T> | ||
| 177 | constexpr | ||
| 178 | T const& | ||
| 179 | 24887 | get(tuple_element_impl<I, T> const& te) | |
| 180 | { | ||
| 181 | 24887 | return te.get(); | |
| 182 | } | ||
| 183 | |||
| 184 | template<std::size_t I, class T> | ||
| 185 | constexpr | ||
| 186 | T&& | ||
| 187 | get(tuple_element_impl<I, T>&& te) | ||
| 188 | { | ||
| 189 | return std::move(te.get()); | ||
| 190 | } | ||
| 191 | |||
| 192 | template<std::size_t I, class T> | ||
| 193 | constexpr | ||
| 194 | T& | ||
| 195 | get(tuple_element_impl<I, T&>&& te) | ||
| 196 | { | ||
| 197 | return te.get(); | ||
| 198 | } | ||
| 199 | |||
| 200 | template<std::size_t I, class T> | ||
| 201 | using tuple_element = | ||
| 202 | typename boost::copy_cv< | ||
| 203 | mp11::mp_at_c<typename | ||
| 204 | remove_cv<T>::type, | ||
| 205 | I>, T>::type; | ||
| 206 | |||
| 207 | } // detail | ||
| 208 | } // grammar | ||
| 209 | } // urls | ||
| 210 | } // boost | ||
| 211 | |||
| 212 | #endif | ||
| 213 |