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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2022 Vinnie Falco (vinnie dot falco at gmail dot com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/boostorg/url | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_URL_GRAMMAR_IMPL_TUPLE_RULE_HPP | ||
| 11 | #define BOOST_URL_GRAMMAR_IMPL_TUPLE_RULE_HPP | ||
| 12 | |||
| 13 | #include <boost/url/grammar/parse.hpp> | ||
| 14 | #include <boost/mp11/integral.hpp> | ||
| 15 | #include <boost/mp11/list.hpp> | ||
| 16 | #include <boost/mp11/tuple.hpp> | ||
| 17 | #include <type_traits> | ||
| 18 | |||
| 19 | namespace boost { | ||
| 20 | namespace urls { | ||
| 21 | namespace grammar { | ||
| 22 | |||
| 23 | namespace detail { | ||
| 24 | |||
| 25 | // returns a tuple | ||
| 26 | template< | ||
| 27 | bool IsList, | ||
| 28 | class R0, class... Rn> | ||
| 29 | struct parse_sequence | ||
| 30 | { | ||
| 31 | using R = detail::tuple<R0, Rn...>; | ||
| 32 | |||
| 33 | using L = mp11::mp_list< | ||
| 34 | typename R0::value_type, | ||
| 35 | typename Rn::value_type...>; | ||
| 36 | |||
| 37 | using V = mp11::mp_remove< | ||
| 38 | std::tuple< | ||
| 39 | system::result<typename R0::value_type>, | ||
| 40 | system::result<typename Rn::value_type>...>, | ||
| 41 | system::result<void>>; | ||
| 42 | |||
| 43 | template<std::size_t I> | ||
| 44 | using is_void = std::is_same< | ||
| 45 | mp11::mp_at_c<L, I>, void>; | ||
| 46 | |||
| 47 | system::error_code ec; | ||
| 48 | R const& rn; | ||
| 49 | V vn; | ||
| 50 | |||
| 51 | explicit | ||
| 52 | 5001 | parse_sequence( | |
| 53 | R const& rn_) noexcept | ||
| 54 | : rn(rn_) | ||
| 55 | , vn(mp11::mp_fill< | ||
| 56 | 5001 | V, system::error_code>{}) | |
| 57 | { | ||
| 58 | 5001 | } | |
| 59 | |||
| 60 | void | ||
| 61 | 1901 | apply( | |
| 62 | char const*&, | ||
| 63 | char const*, | ||
| 64 | ...) const noexcept | ||
| 65 | { | ||
| 66 | 1901 | } | |
| 67 | |||
| 68 | // for system::result<void> | ||
| 69 | template< | ||
| 70 | std::size_t Ir, | ||
| 71 | std::size_t Iv> | ||
| 72 | void | ||
| 73 | 2970 | apply( | |
| 74 | char const*& it, | ||
| 75 | char const* end, | ||
| 76 | mp11::mp_size_t<Ir> const&, | ||
| 77 | mp11::mp_size_t<Iv> const&, | ||
| 78 | mp11::mp_true const&) | ||
| 79 | { | ||
| 80 | system::result<void> rv = | ||
| 81 |
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2970 | grammar::parse( |
| 82 | 2970 | it, end, get<Ir>(rn)); | |
| 83 |
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2970 | if( !rv ) |
| 84 | { | ||
| 85 | 704 | ec = rv.error(); | |
| 86 | 704 | return; | |
| 87 | } | ||
| 88 | 2266 | apply(it, end, | |
| 89 | mp11::mp_size_t<Ir+1>{}, | ||
| 90 | mp11::mp_size_t<Iv>{}); | ||
| 91 | } | ||
| 92 | |||
| 93 | template< | ||
| 94 | std::size_t Ir, | ||
| 95 | std::size_t Iv> | ||
| 96 | void | ||
| 97 | 9638 | apply( | |
| 98 | char const*& it, | ||
| 99 | char const* end, | ||
| 100 | mp11::mp_size_t<Ir> const&, | ||
| 101 | mp11::mp_size_t<Iv> const&, | ||
| 102 | mp11::mp_false const&) | ||
| 103 | { | ||
| 104 | 9638 | auto& rv = get<Iv>(vn); | |
| 105 | 9638 | rv = grammar::parse( | |
| 106 | 9638 | it, end, get<Ir>(rn)); | |
| 107 |
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9638 | if( !rv ) |
| 108 | { | ||
| 109 | 4138 | ec = rv.error(); | |
| 110 | 4138 | return; | |
| 111 | } | ||
| 112 | 5500 | apply(it, end, | |
| 113 | mp11::mp_size_t<Ir+1>{}, | ||
| 114 | mp11::mp_size_t<Iv+1>{}); | ||
| 115 | } | ||
| 116 | |||
| 117 | template< | ||
| 118 | std::size_t Ir = 0, | ||
| 119 | std::size_t Iv = 0> | ||
| 120 | typename std::enable_if< | ||
| 121 | Ir < 1 + sizeof...(Rn)>::type | ||
| 122 | 12608 | apply( | |
| 123 | char const*& it, | ||
| 124 | char const* end, | ||
| 125 | mp11::mp_size_t<Ir> const& ir = {}, | ||
| 126 | mp11::mp_size_t<Iv> const& iv = {} | ||
| 127 | ) noexcept | ||
| 128 | { | ||
| 129 | 12608 | apply(it, end, ir, iv, is_void<Ir>{}); | |
| 130 | 12608 | } | |
| 131 | |||
| 132 | struct deref | ||
| 133 | { | ||
| 134 | template<class R> | ||
| 135 | auto | ||
| 136 | 4726 | operator()(R const& r) const -> | |
| 137 | decltype(*r) | ||
| 138 | { | ||
| 139 | 4726 | return *r; | |
| 140 | } | ||
| 141 | }; | ||
| 142 | |||
| 143 | auto | ||
| 144 | 5001 | make_result() noexcept -> | |
| 145 | system::result<typename tuple_rule_t< | ||
| 146 | R0, Rn...>::value_type> | ||
| 147 | { | ||
| 148 |
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5001 | if(ec.failed()) |
| 149 | 3100 | return ec; | |
| 150 | return mp11::tuple_transform( | ||
| 151 | 1901 | deref{}, vn); | |
| 152 | } | ||
| 153 | }; | ||
| 154 | |||
| 155 | // returns a value_type | ||
| 156 | template<class R0, class... Rn> | ||
| 157 | struct parse_sequence<false, R0, Rn...> | ||
| 158 | { | ||
| 159 | using R = detail::tuple<R0, Rn...>; | ||
| 160 | |||
| 161 | using L = mp11::mp_list< | ||
| 162 | typename R0::value_type, | ||
| 163 | typename Rn::value_type...>; | ||
| 164 | |||
| 165 | using V = mp11::mp_first< | ||
| 166 | mp11::mp_remove< | ||
| 167 | mp11::mp_list< | ||
| 168 | system::result<typename R0::value_type>, | ||
| 169 | system::result<typename Rn::value_type>...>, | ||
| 170 | system::result<void>>>; | ||
| 171 | |||
| 172 | template<std::size_t I> | ||
| 173 | using is_void = std::is_same< | ||
| 174 | mp11::mp_at_c<L, I>, void>; | ||
| 175 | |||
| 176 | R const& rn; | ||
| 177 | V v; | ||
| 178 | |||
| 179 | explicit | ||
| 180 | 9708 | parse_sequence( | |
| 181 | R const& rn_) noexcept | ||
| 182 | : rn(rn_) | ||
| 183 | 9708 | , v(system::error_code{}) | |
| 184 | { | ||
| 185 | 9708 | } | |
| 186 | |||
| 187 | void | ||
| 188 | 4332 | apply( | |
| 189 | char const*&, | ||
| 190 | char const*, | ||
| 191 | ...) const noexcept | ||
| 192 | { | ||
| 193 | 4332 | } | |
| 194 | |||
| 195 | // for system::result<void> | ||
| 196 | template< | ||
| 197 | std::size_t Ir, | ||
| 198 | std::size_t Iv> | ||
| 199 | BOOST_URL_NO_INLINE | ||
| 200 | void | ||
| 201 | 8733 | apply( | |
| 202 | char const*& it, | ||
| 203 | char const* end, | ||
| 204 | mp11::mp_size_t<Ir> const&, | ||
| 205 | mp11::mp_size_t<Iv> const&, | ||
| 206 | mp11::mp_true const&) | ||
| 207 | { | ||
| 208 | system::result<void> rv = | ||
| 209 |
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8733 | grammar::parse( |
| 210 | 8733 | it, end, get<Ir>(rn)); | |
| 211 |
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8733 | if( !rv ) |
| 212 | { | ||
| 213 | 4286 | v = rv.error(); | |
| 214 | 4286 | return; | |
| 215 | } | ||
| 216 | 4447 | apply(it, end, | |
| 217 | mp11::mp_size_t<Ir+1>{}, | ||
| 218 | mp11::mp_size_t<Iv>{}); | ||
| 219 | } | ||
| 220 | |||
| 221 | template< | ||
| 222 | std::size_t Ir, | ||
| 223 | std::size_t Iv> | ||
| 224 | void | ||
| 225 | 7259 | apply( | |
| 226 | char const*& it, | ||
| 227 | char const* end, | ||
| 228 | mp11::mp_size_t<Ir> const&, | ||
| 229 | mp11::mp_size_t<Iv> const&, | ||
| 230 | mp11::mp_false const&) | ||
| 231 | { | ||
| 232 | 7259 | v = grammar::parse( | |
| 233 | 7259 | it, end, get<Ir>(rn)); | |
| 234 |
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7259 | if( !v ) |
| 235 | 1090 | return; | |
| 236 | 6169 | apply(it, end, | |
| 237 | mp11::mp_size_t<Ir+1>{}, | ||
| 238 | mp11::mp_size_t<Iv+1>{}); | ||
| 239 | } | ||
| 240 | |||
| 241 | template< | ||
| 242 | std::size_t Ir = 0, | ||
| 243 | std::size_t Iv = 0> | ||
| 244 | typename std::enable_if< | ||
| 245 | Ir < 1 + sizeof...(Rn)>::type | ||
| 246 | 25502 | apply( | |
| 247 | char const*& it, | ||
| 248 | char const* end, | ||
| 249 | mp11::mp_size_t<Ir> const& ir = {}, | ||
| 250 | mp11::mp_size_t<Iv> const& iv = {} | ||
| 251 | ) noexcept | ||
| 252 | { | ||
| 253 | 25502 | apply(it, end, ir, iv, is_void<Ir>{}); | |
| 254 | 25502 | } | |
| 255 | |||
| 256 | V | ||
| 257 | 9708 | make_result() noexcept | |
| 258 | { | ||
| 259 | 9708 | return v; | |
| 260 | } | ||
| 261 | }; | ||
| 262 | |||
| 263 | } // detail | ||
| 264 | |||
| 265 | template< | ||
| 266 | class R0, | ||
| 267 | class... Rn> | ||
| 268 | auto | ||
| 269 | 11079 | tuple_rule_t<R0, Rn...>:: | |
| 270 | parse( | ||
| 271 | char const*& it, | ||
| 272 | char const* end) const -> | ||
| 273 | system::result<value_type> | ||
| 274 | { | ||
| 275 | detail::parse_sequence< | ||
| 276 | 14146 | IsList, R0, Rn...> t(this->get()); | |
| 277 | 11079 | t.apply(it, end); | |
| 278 | 11079 | return t.make_result(); | |
| 279 | } | ||
| 280 | |||
| 281 | } // grammar | ||
| 282 | } // urls | ||
| 283 | } // boost | ||
| 284 | |||
| 285 | #endif | ||
| 286 |