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annotate DEPENDENCIES/generic/include/boost/spirit/home/support/make_component.hpp @ 133:4acb5d8d80b6 tip

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Don't fail environmental check if README.md exists (but .txt and no-suffix don't)
author Chris Cannam
date Tue, 30 Jul 2019 12:25:44 +0100
parents c530137014c0
children
rev   line source
Chris@16 1 /*=============================================================================
Chris@16 2 Copyright (c) 2001-2011 Joel de Guzman
Chris@16 3 http://spirit.sourceforge.net/
Chris@16 4
Chris@16 5 Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16 6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16 7 =============================================================================*/
Chris@16 8 #ifndef BOOST_SPIRIT_MAKE_COMPONENT_OCTOBER_16_2008_1250PM
Chris@16 9 #define BOOST_SPIRIT_MAKE_COMPONENT_OCTOBER_16_2008_1250PM
Chris@16 10
Chris@16 11 #if defined(_MSC_VER)
Chris@16 12 #pragma once
Chris@16 13 #endif
Chris@16 14
Chris@16 15 #include <boost/spirit/include/phoenix_core.hpp>
Chris@16 16 #include <boost/proto/proto.hpp>
Chris@16 17 #include <boost/spirit/home/support/detail/make_cons.hpp>
Chris@16 18 #include <boost/spirit/home/support/modify.hpp>
Chris@16 19
Chris@16 20 namespace boost { namespace spirit
Chris@16 21 {
Chris@16 22 // There is no real "component" class. Each domain is responsible
Chris@16 23 // for creating its own components. You need to specialize this for
Chris@16 24 // each component in your domain. Use this as a guide.
Chris@16 25
Chris@16 26 template <typename Domain, typename Tag, typename Enable = void>
Chris@16 27 struct make_component
Chris@16 28 {
Chris@16 29 template <typename Sig>
Chris@16 30 struct result;
Chris@16 31
Chris@16 32 template <typename This, typename Elements, typename Modifiers>
Chris@16 33 struct result<This(Elements, Modifiers)>;
Chris@16 34
Chris@16 35 template <typename Elements, typename Modifiers>
Chris@16 36 typename result<make_component(Elements, Modifiers)>::type
Chris@16 37 operator()(Elements const& elements, Modifiers const& modifiers) const;
Chris@16 38 };
Chris@16 39
Chris@16 40 namespace tag
Chris@16 41 {
Chris@16 42 // Normally, we use proto tags as-is to distinguish operators.
Chris@16 43 // The special case is proto::tag::subscript. Spirit uses this
Chris@16 44 // as either sementic actions or directives. To distinguish between
Chris@16 45 // the two, we use these special tags below.
Chris@16 46
Chris@16 47 struct directive;
Chris@16 48 struct action;
Chris@16 49 }
Chris@16 50
Chris@16 51 template <typename Domain, typename T, typename Enable = void>
Chris@16 52 struct flatten_tree;
Chris@16 53 }}
Chris@16 54
Chris@16 55 namespace boost { namespace spirit { namespace detail
Chris@16 56 {
Chris@16 57 template <typename Expr, typename State, typename Data, typename Domain>
Chris@16 58 struct make_terminal_impl
Chris@16 59 : proto::transform_impl<Expr, State, Data>
Chris@16 60 {
Chris@16 61 typedef typename
Chris@16 62 proto::result_of::value<Expr>::type
Chris@16 63 value;
Chris@16 64
Chris@16 65 typedef typename result_of::make_cons<value>::type elements;
Chris@16 66
Chris@16 67 typedef
Chris@16 68 make_component<Domain, proto::tag::terminal>
Chris@16 69 make_component_;
Chris@16 70
Chris@16 71 typedef typename
Chris@16 72 make_component_::template
Chris@16 73 result<make_component_(elements, Data)>::type
Chris@16 74 result_type;
Chris@16 75
Chris@16 76 result_type operator()(
Chris@16 77 typename make_terminal_impl::expr_param expr
Chris@16 78 , typename make_terminal_impl::state_param /*state*/
Chris@16 79 , typename make_terminal_impl::data_param data
Chris@16 80 ) const
Chris@16 81 {
Chris@16 82 return typename make_terminal_impl::make_component_()(
Chris@16 83 detail::make_cons(proto::value(expr))
Chris@16 84 , data
Chris@16 85 );
Chris@16 86 }
Chris@16 87 };
Chris@16 88
Chris@16 89 template <typename Expr, typename State, typename Data, typename Domain>
Chris@16 90 struct make_terminal_impl<phoenix::actor<Expr>, State, Data, Domain>
Chris@16 91 : proto::transform_impl<phoenix::actor<Expr>, State, Data>
Chris@16 92 {
Chris@16 93 typedef phoenix::actor<Expr> value;
Chris@16 94 typedef typename result_of::make_cons<value>::type elements;
Chris@16 95 typedef make_component<Domain, proto::tag::terminal> make_component_;
Chris@16 96
Chris@16 97 typedef typename
Chris@16 98 make_component_::template
Chris@16 99 result<make_component_(elements, Data)>::type
Chris@16 100 result_type;
Chris@16 101
Chris@16 102 result_type operator()(
Chris@16 103 typename make_terminal_impl::expr_param expr
Chris@16 104 , typename make_terminal_impl::state_param /*state*/
Chris@16 105 , typename make_terminal_impl::data_param data
Chris@16 106 ) const
Chris@16 107 {
Chris@16 108 return typename make_terminal_impl::make_component_()(
Chris@16 109 detail::make_cons(expr)
Chris@16 110 , data
Chris@16 111 );
Chris@16 112 }
Chris@16 113 };
Chris@16 114
Chris@16 115 template <typename Expr, typename State, typename Data, typename Domain>
Chris@16 116 struct make_terminal_impl<phoenix::actor<Expr> &, State, Data, Domain>
Chris@16 117 : make_terminal_impl<phoenix::actor<Expr>, State, Data, Domain>
Chris@16 118 {};
Chris@16 119
Chris@16 120 template <typename Expr, typename State, typename Data, typename Domain>
Chris@16 121 struct make_terminal_impl<phoenix::actor<Expr> const &, State, Data, Domain>
Chris@16 122 : make_terminal_impl<phoenix::actor<Expr>, State, Data, Domain>
Chris@16 123 {};
Chris@16 124
Chris@16 125 template <typename Domain>
Chris@16 126 struct make_terminal : proto::transform<make_terminal<Domain> >
Chris@16 127 {
Chris@16 128 template<typename Expr, typename State, typename Data>
Chris@16 129 struct impl : make_terminal_impl<Expr, State, Data, Domain> {};
Chris@16 130 };
Chris@16 131
Chris@16 132 template <typename Domain, typename Tag, typename Grammar>
Chris@16 133 struct make_unary : proto::transform<make_unary<Domain, Tag, Grammar> >
Chris@16 134 {
Chris@16 135 template<typename Expr, typename State, typename Data>
Chris@16 136 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 137 {
Chris@16 138 typedef typename
Chris@16 139 proto::result_of::child_c<Expr, 0>::type
Chris@16 140 child;
Chris@16 141
Chris@16 142 typedef typename Grammar::
Chris@16 143 template result<Grammar(child, State, Data)>::type
Chris@16 144 child_component;
Chris@16 145
Chris@16 146 typedef typename
Chris@16 147 result_of::make_cons<child_component>::type
Chris@16 148 elements;
Chris@16 149
Chris@16 150 typedef make_component<Domain, Tag> make_component_;
Chris@16 151
Chris@16 152 typedef typename
Chris@16 153 make_component_::template
Chris@16 154 result<make_component_(elements, Data)>::type
Chris@16 155 result_type;
Chris@16 156
Chris@16 157 result_type operator()(
Chris@16 158 typename impl::expr_param expr
Chris@16 159 , typename impl::state_param state
Chris@16 160 , typename impl::data_param data
Chris@16 161 ) const
Chris@16 162 {
Chris@16 163 return typename impl::make_component_()(
Chris@16 164 detail::make_cons(
Chris@16 165 Grammar()(proto::child(expr), state, data))
Chris@16 166 , data
Chris@16 167 );
Chris@16 168 }
Chris@16 169 };
Chris@16 170 };
Chris@16 171
Chris@16 172 // un-flattened version
Chris@16 173 template <typename Domain, typename Tag, typename Grammar,
Chris@16 174 bool flatten = flatten_tree<Domain, Tag>::value>
Chris@16 175 struct make_binary
Chris@16 176 {
Chris@16 177 template<typename Expr, typename State, typename Data>
Chris@16 178 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 179 {
Chris@16 180 typedef typename Grammar::
Chris@16 181 template result<Grammar(
Chris@16 182 typename proto::result_of::child_c<Expr, 0>::type
Chris@16 183 , State, Data)>::type
Chris@16 184 lhs_component;
Chris@16 185
Chris@16 186 typedef typename Grammar::
Chris@16 187 template result<Grammar(
Chris@16 188 typename proto::result_of::child_c<Expr, 1>::type
Chris@16 189 , State, Data)>::type
Chris@16 190 rhs_component;
Chris@16 191
Chris@16 192 typedef typename
Chris@16 193 result_of::make_cons<
Chris@16 194 lhs_component
Chris@16 195 , typename result_of::make_cons<rhs_component>::type
Chris@16 196 >::type
Chris@16 197 elements_type;
Chris@16 198
Chris@16 199 typedef make_component<Domain, Tag> make_component_;
Chris@16 200
Chris@16 201 typedef typename
Chris@16 202 make_component_::template
Chris@16 203 result<make_component_(elements_type, Data)>::type
Chris@16 204 result_type;
Chris@16 205
Chris@16 206 result_type operator()(
Chris@16 207 typename impl::expr_param expr
Chris@16 208 , typename impl::state_param state
Chris@16 209 , typename impl::data_param data
Chris@16 210 ) const
Chris@16 211 {
Chris@16 212 elements_type elements =
Chris@16 213 detail::make_cons(
Chris@16 214 Grammar()(
Chris@16 215 proto::child_c<0>(expr), state, data) // LHS
Chris@16 216 , detail::make_cons(
Chris@16 217 Grammar()(
Chris@16 218 proto::child_c<1>(expr), state, data) // RHS
Chris@16 219 )
Chris@16 220 );
Chris@16 221
Chris@16 222 return make_component_()(elements, data);
Chris@16 223 }
Chris@16 224 };
Chris@16 225 };
Chris@16 226
Chris@16 227 template <typename Grammar>
Chris@16 228 struct make_binary_helper : proto::transform<make_binary_helper<Grammar> >
Chris@16 229 {
Chris@16 230 template<typename Expr, typename State, typename Data>
Chris@16 231 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 232 {
Chris@16 233 typedef typename Grammar::
Chris@16 234 template result<Grammar(Expr, State, Data)>::type
Chris@16 235 lhs;
Chris@16 236
Chris@16 237 typedef typename result_of::make_cons<lhs, State>::type result_type;
Chris@16 238
Chris@16 239 result_type operator()(
Chris@16 240 typename impl::expr_param expr
Chris@16 241 , typename impl::state_param state
Chris@16 242 , typename impl::data_param data
Chris@16 243 ) const
Chris@16 244 {
Chris@16 245 return detail::make_cons(Grammar()(expr, state, data), state);
Chris@16 246 }
Chris@16 247 };
Chris@16 248 };
Chris@16 249
Chris@16 250 // Flattened version
Chris@16 251 template <typename Domain, typename Tag, typename Grammar>
Chris@16 252 struct make_binary<Domain, Tag, Grammar, true>
Chris@16 253 : proto::transform<make_binary<Domain, Tag, Grammar> >
Chris@16 254 {
Chris@16 255 template<typename Expr, typename State, typename Data>
Chris@16 256 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 257 {
Chris@16 258 typedef typename
Chris@16 259 proto::reverse_fold_tree<
Chris@16 260 proto::_
Chris@101 261 , proto::make<fusion::nil_>
Chris@16 262 , make_binary_helper<Grammar>
Chris@16 263 >::template impl<Expr, State, Data>
Chris@16 264 reverse_fold_tree;
Chris@16 265
Chris@16 266 typedef typename reverse_fold_tree::result_type elements;
Chris@16 267 typedef make_component<Domain, Tag> make_component_;
Chris@16 268
Chris@16 269 typedef typename
Chris@16 270 make_component_::template
Chris@16 271 result<make_component_(elements, Data)>::type
Chris@16 272 result_type;
Chris@16 273
Chris@16 274 result_type operator()(
Chris@16 275 typename impl::expr_param expr
Chris@16 276 , typename impl::state_param state
Chris@16 277 , typename impl::data_param data
Chris@16 278 ) const
Chris@16 279 {
Chris@16 280 return make_component_()(
Chris@16 281 reverse_fold_tree()(expr, state, data), data);
Chris@16 282 }
Chris@16 283 };
Chris@16 284 };
Chris@16 285
Chris@16 286 template <typename Domain, typename Grammar>
Chris@16 287 struct make_directive : proto::transform<make_directive<Domain, Grammar> >
Chris@16 288 {
Chris@16 289 template<typename Expr, typename State, typename Data>
Chris@16 290 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 291 {
Chris@16 292 typedef typename
Chris@16 293 proto::result_of::child_c<Expr, 0>::type
Chris@16 294 lhs;
Chris@16 295
Chris@16 296 typedef typename
Chris@16 297 proto::result_of::value<lhs>::type
Chris@16 298 tag_type;
Chris@16 299
Chris@16 300 typedef typename modify<Domain>::
Chris@16 301 template result<modify<Domain>(tag_type, Data)>::type
Chris@16 302 modifier_type;
Chris@16 303
Chris@16 304 typedef typename Grammar::
Chris@16 305 template result<Grammar(
Chris@16 306 typename proto::result_of::child_c<Expr, 1>::type
Chris@16 307 , State
Chris@16 308 , modifier_type
Chris@16 309 )>::type
Chris@16 310 rhs_component;
Chris@16 311
Chris@16 312 typedef typename
Chris@16 313 result_of::make_cons<
Chris@16 314 tag_type
Chris@16 315 , typename result_of::make_cons<rhs_component>::type
Chris@16 316 >::type
Chris@16 317 elements_type;
Chris@16 318
Chris@16 319 typedef make_component<Domain, tag::directive> make_component_;
Chris@16 320
Chris@16 321 typedef typename
Chris@16 322 make_component_::template
Chris@16 323 result<make_component_(elements_type, Data)>::type
Chris@16 324 result_type;
Chris@16 325
Chris@16 326 result_type operator()(
Chris@16 327 typename impl::expr_param expr
Chris@16 328 , typename impl::state_param state
Chris@16 329 , typename impl::data_param data
Chris@16 330 ) const
Chris@16 331 {
Chris@16 332 tag_type tag = proto::value(proto::child_c<0>(expr));
Chris@16 333 typename remove_reference<modifier_type>::type
Chris@16 334 modifier = modify<Domain>()(tag, data);
Chris@16 335
Chris@16 336 elements_type elements =
Chris@16 337 detail::make_cons(
Chris@16 338 tag // LHS
Chris@16 339 , detail::make_cons(
Chris@16 340 Grammar()(
Chris@16 341 proto::child_c<1>(expr) // RHS
Chris@16 342 , state, modifier)
Chris@16 343 )
Chris@16 344 );
Chris@16 345
Chris@16 346 return make_component_()(elements, data);
Chris@16 347 }
Chris@16 348 };
Chris@16 349 };
Chris@16 350
Chris@16 351 template <typename Domain, typename Grammar>
Chris@16 352 struct make_action : proto::transform<make_action<Domain, Grammar> >
Chris@16 353 {
Chris@16 354 template<typename Expr, typename State, typename Data>
Chris@16 355 struct impl : proto::transform_impl<Expr, State, Data>
Chris@16 356 {
Chris@16 357 typedef typename Grammar::
Chris@16 358 template result<Grammar(
Chris@16 359 typename proto::result_of::child_c<Expr, 0>::type
Chris@16 360 , State
Chris@16 361 , Data
Chris@16 362 )>::type
Chris@16 363 lhs_component;
Chris@16 364
Chris@16 365 typedef
Chris@16 366 typename mpl::eval_if_c<
Chris@16 367 phoenix::is_actor<
Chris@16 368 typename proto::result_of::child_c<Expr, 1>::type
Chris@16 369 >::type::value
Chris@16 370 , proto::result_of::child_c<Expr, 1>
Chris@16 371 , proto::result_of::value<
Chris@16 372 typename proto::result_of::child_c<Expr, 1>::type
Chris@16 373 >
Chris@16 374 >::type
Chris@16 375 rhs_component;
Chris@16 376
Chris@16 377 typedef typename
Chris@16 378 result_of::make_cons<
Chris@16 379 lhs_component
Chris@16 380 , typename result_of::make_cons<rhs_component>::type
Chris@16 381 >::type
Chris@16 382 elements_type;
Chris@16 383
Chris@16 384 typedef make_component<Domain, tag::action> make_component_;
Chris@16 385
Chris@16 386 typedef typename
Chris@16 387 make_component_::template
Chris@16 388 result<make_component_(elements_type, Data)>::type
Chris@16 389 result_type;
Chris@16 390
Chris@16 391 result_type operator()(
Chris@16 392 typename impl::expr_param expr
Chris@16 393 , typename impl::state_param state
Chris@16 394 , typename impl::data_param data
Chris@16 395 ) const
Chris@16 396 {
Chris@16 397 return
Chris@16 398 (*this)(
Chris@16 399 expr
Chris@16 400 , state
Chris@16 401 , data
Chris@16 402 , typename phoenix::is_actor<
Chris@16 403 typename proto::result_of::child_c<Expr, 1>::type
Chris@16 404 >::type()
Chris@16 405 );
Chris@16 406 }
Chris@16 407
Chris@16 408 result_type operator()(
Chris@16 409 typename impl::expr_param expr
Chris@16 410 , typename impl::state_param state
Chris@16 411 , typename impl::data_param data
Chris@16 412 , mpl::false_
Chris@16 413 ) const
Chris@16 414 {
Chris@16 415 elements_type elements =
Chris@16 416 detail::make_cons(
Chris@16 417 Grammar()(
Chris@16 418 proto::child_c<0>(expr), state, data) // LHS
Chris@16 419 , detail::make_cons(
Chris@16 420 proto::value(proto::child_c<1>(expr))) // RHS
Chris@16 421 );
Chris@16 422
Chris@16 423 return make_component_()(elements, data);
Chris@16 424 }
Chris@16 425
Chris@16 426 result_type operator()(
Chris@16 427 typename impl::expr_param expr
Chris@16 428 , typename impl::state_param state
Chris@16 429 , typename impl::data_param data
Chris@16 430 , mpl::true_
Chris@16 431 ) const
Chris@16 432 {
Chris@16 433 elements_type elements =
Chris@16 434 detail::make_cons(
Chris@16 435 Grammar()(
Chris@16 436 proto::child_c<0>(expr), state, data) // LHS
Chris@16 437 , detail::make_cons(
Chris@16 438 proto::child_c<1>(expr)) // RHS
Chris@16 439 );
Chris@16 440
Chris@16 441 return make_component_()(elements, data);
Chris@16 442 }
Chris@16 443 };
Chris@16 444 };
Chris@16 445 }}}
Chris@16 446
Chris@16 447 #endif