3 // Copyright (C) 2005-2018 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
29 // notice appears in all copies, and that both that copyright notice and
30 // this permission notice appear in supporting documentation. None of
31 // the above authors, nor IBM Haifa Research Laboratories, make any
32 // representation about the suitability of this software for any
33 // purpose. It is provided "as is" without express or implied warranty.
36 * @file ext/typelist.h
37 * This file is a GNU extension to the Standard C++ Library.
39 * Contains typelist_chain definitions.
40 * Typelists are an idea by Andrei Alexandrescu.
46 #include <ext/type_traits.h>
48 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
50 _GLIBCXX_BEGIN_NAMESPACE_VERSION
52 /** @namespace __gnu_cxx::typelist
53 * @brief GNU typelist extensions for public compile-time use.
59 template<typename Root>
65 // Forward declarations of functors.
66 template<typename Hd, typename Typelist>
70 typedef Typelist tail;
73 // Apply all typelist types to unary functor.
74 template<typename Fn, typename Typelist>
78 /// Apply all typelist types to generator functor.
79 template<typename Gn, typename Typelist>
81 apply_generator(Gn&, Typelist);
83 // Apply all typelist types and values to generator functor.
84 template<typename Gn, typename TypelistT, typename TypelistV>
86 apply_generator(Gn&, TypelistT, TypelistV);
88 template<typename Typelist0, typename Typelist1>
91 template<typename Typelist_Typelist>
92 struct append_typelist;
94 template<typename Typelist, typename T>
97 template<typename Typelist, template<typename T> class Pred>
100 template<typename Typelist, int i>
103 template<typename Typelist, template<typename T> class Transform>
106 template<typename Typelist_Typelist>
109 template<typename Typelist>
112 template<typename T1>
115 template<typename T1, typename T2>
118 template<typename T1, typename T2, typename T3>
121 template<typename T1, typename T2, typename T3, typename T4>
124 template<typename T1, typename T2, typename T3, typename T4, typename T5>
127 template<typename T1, typename T2, typename T3,
128 typename T4, typename T5, typename T6>
133 template<typename Fn, typename Typelist_Chain>
136 template<typename Fn, typename Hd, typename Tl>
137 struct apply_<Fn, chain<Hd, Tl> >
148 template<typename Fn>
149 struct apply_<Fn, null_type>
155 template<typename Gn, typename Typelist_Chain>
156 struct apply_generator1_;
158 template<typename Gn, typename Hd, typename Tl>
159 struct apply_generator1_<Gn, chain<Hd, Tl> >
164 g.template operator()<Hd>();
165 apply_generator1_<Gn, Tl> next;
170 template<typename Gn>
171 struct apply_generator1_<Gn, null_type>
177 template<typename Gn, typename TypelistT_Chain, typename TypelistV_Chain>
178 struct apply_generator2_;
180 template<typename Gn, typename Hd1, typename TlT, typename Hd2, typename TlV>
181 struct apply_generator2_<Gn, chain<Hd1, TlT>, chain<Hd2, TlV> >
186 g.template operator()<Hd1, Hd2>();
187 apply_generator2_<Gn, TlT, TlV> next;
192 template<typename Gn>
193 struct apply_generator2_<Gn, null_type, null_type>
199 template<typename Typelist_Chain0, typename Typelist_Chain1>
202 template<typename Hd, typename Tl, typename Typelist_Chain>
203 struct append_<chain<Hd, Tl>, Typelist_Chain>
206 typedef append_<Tl, Typelist_Chain> append_type;
209 typedef chain<Hd, typename append_type::type> type;
212 template<typename Typelist_Chain>
213 struct append_<null_type, Typelist_Chain>
215 typedef Typelist_Chain type;
218 template<typename Typelist_Chain>
219 struct append_<Typelist_Chain, null_type>
221 typedef Typelist_Chain type;
225 struct append_<null_type, null_type>
227 typedef null_type type;
230 template<typename Typelist_Typelist_Chain>
231 struct append_typelist_;
233 template<typename Hd>
234 struct append_typelist_<chain<Hd, null_type> >
236 typedef chain<Hd, null_type> type;
239 template<typename Hd, typename Tl>
240 struct append_typelist_<chain< Hd, Tl> >
243 typedef typename append_typelist_<Tl>::type rest_type;
246 typedef typename append<Hd, node<rest_type> >::type::root type;
249 template<typename Typelist_Chain, typename T>
253 struct contains_<null_type, T>
261 template<typename Hd, typename Tl, typename T>
262 struct contains_<chain<Hd, Tl>, T>
266 value = contains_<Tl, T>::value
270 template<typename Tl, typename T>
271 struct contains_<chain<T, Tl>, T>
279 template<typename Typelist_Chain, template<typename T> class Pred>
280 struct chain_filter_;
282 template<template<typename T> class Pred>
283 struct chain_filter_<null_type, Pred>
285 typedef null_type type;
288 template<typename Hd, typename Tl, template<typename T> class Pred>
289 struct chain_filter_<chain<Hd, Tl>, Pred>
294 include_hd = Pred<Hd>::value
297 typedef typename chain_filter_<Tl, Pred>::type rest_type;
298 typedef chain<Hd, rest_type> chain_type;
301 typedef typename __conditional_type<include_hd, chain_type, rest_type>::__type type;
304 template<typename Typelist_Chain, int i>
305 struct chain_at_index_;
307 template<typename Hd, typename Tl>
308 struct chain_at_index_<chain<Hd, Tl>, 0>
313 template<typename Hd, typename Tl, int i>
314 struct chain_at_index_<chain<Hd, Tl>, i>
316 typedef typename chain_at_index_<Tl, i - 1>::type type;
319 template<class Typelist_Chain, template<typename T> class Transform>
320 struct chain_transform_;
322 template<template<typename T> class Transform>
323 struct chain_transform_<null_type, Transform>
325 typedef null_type type;
328 template<class Hd, class Tl, template<typename T> class Transform>
329 struct chain_transform_<chain<Hd, Tl>, Transform>
332 typedef typename chain_transform_<Tl, Transform>::type rest_type;
333 typedef typename Transform<Hd>::type transform_type;
336 typedef chain<transform_type, rest_type> type;
339 template<typename Typelist_Typelist_Chain>
340 struct chain_flatten_;
342 template<typename Hd_Tl>
343 struct chain_flatten_<chain<Hd_Tl, null_type> >
345 typedef typename Hd_Tl::root type;
348 template<typename Hd_Typelist, class Tl_Typelist>
349 struct chain_flatten_<chain<Hd_Typelist, Tl_Typelist> >
352 typedef typename chain_flatten_<Tl_Typelist>::type rest_type;
353 typedef append<Hd_Typelist, node<rest_type> > append_type;
355 typedef typename append_type::type::root type;
357 } // namespace detail
359 #define _GLIBCXX_TYPELIST_CHAIN1(X0) __gnu_cxx::typelist::chain<X0, __gnu_cxx::typelist::null_type>
360 #define _GLIBCXX_TYPELIST_CHAIN2(X0, X1) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN1(X1) >
361 #define _GLIBCXX_TYPELIST_CHAIN3(X0, X1, X2) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN2(X1, X2) >
362 #define _GLIBCXX_TYPELIST_CHAIN4(X0, X1, X2, X3) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN3(X1, X2, X3) >
363 #define _GLIBCXX_TYPELIST_CHAIN5(X0, X1, X2, X3, X4) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN4(X1, X2, X3, X4) >
364 #define _GLIBCXX_TYPELIST_CHAIN6(X0, X1, X2, X3, X4, X5) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN5(X1, X2, X3, X4, X5) >
365 #define _GLIBCXX_TYPELIST_CHAIN7(X0, X1, X2, X3, X4, X5, X6) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN6(X1, X2, X3, X4, X5, X6) >
366 #define _GLIBCXX_TYPELIST_CHAIN8(X0, X1, X2, X3, X4, X5, X6, X7) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN7(X1, X2, X3, X4, X5, X6, X7) >
367 #define _GLIBCXX_TYPELIST_CHAIN9(X0, X1, X2, X3, X4, X5, X6, X7, X8) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN8(X1, X2, X3, X4, X5, X6, X7, X8) >
368 #define _GLIBCXX_TYPELIST_CHAIN10(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN9(X1, X2, X3, X4, X5, X6, X7, X8, X9) >
369 #define _GLIBCXX_TYPELIST_CHAIN11(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN10(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10) >
370 #define _GLIBCXX_TYPELIST_CHAIN12(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN11(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11) >
371 #define _GLIBCXX_TYPELIST_CHAIN13(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN12(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12) >
372 #define _GLIBCXX_TYPELIST_CHAIN14(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN13(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13) >
373 #define _GLIBCXX_TYPELIST_CHAIN15(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN14(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14) >
374 #define _GLIBCXX_TYPELIST_CHAIN16(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN15(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15) >
375 #define _GLIBCXX_TYPELIST_CHAIN17(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN16(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16) >
376 #define _GLIBCXX_TYPELIST_CHAIN18(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN17(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17) >
377 #define _GLIBCXX_TYPELIST_CHAIN19(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN18(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18) >
378 #define _GLIBCXX_TYPELIST_CHAIN20(X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN19(X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19) >
380 template<typename Fn, typename Typelist>
382 apply(Fn& fn, Typelist)
384 detail::apply_<Fn, typename Typelist::root> a;
388 template<typename Fn, typename Typelist>
390 apply_generator(Fn& fn, Typelist)
392 detail::apply_generator1_<Fn, typename Typelist::root> a;
396 template<typename Fn, typename TypelistT, typename TypelistV>
398 apply_generator(Fn& fn, TypelistT, TypelistV)
400 typedef typename TypelistT::root rootT;
401 typedef typename TypelistV::root rootV;
402 detail::apply_generator2_<Fn, rootT, rootV> a;
406 template<typename Typelist0, typename Typelist1>
410 typedef typename Typelist0::root root0_type;
411 typedef typename Typelist1::root root1_type;
412 typedef detail::append_<root0_type, root1_type> append_type;
415 typedef node<typename append_type::type> type;
418 template<typename Typelist_Typelist>
419 struct append_typelist
422 typedef typename Typelist_Typelist::root root_type;
423 typedef detail::append_typelist_<root_type> append_type;
426 typedef node<typename append_type::type> type;
429 template<typename Typelist, typename T>
433 typedef typename Typelist::root root_type;
438 value = detail::contains_<root_type, T>::value
442 template<typename Typelist, template<typename T> class Pred>
446 typedef typename Typelist::root root_type;
447 typedef detail::chain_filter_<root_type, Pred> filter_type;
450 typedef node<typename filter_type::type> type;
453 template<typename Typelist, int i>
457 typedef typename Typelist::root root_type;
458 typedef detail::chain_at_index_<root_type, i> index_type;
461 typedef typename index_type::type type;
464 template<typename Typelist, template<typename T> class Transform>
468 typedef typename Typelist::root root_type;
469 typedef detail::chain_transform_<root_type, Transform> transform_type;
472 typedef node<typename transform_type::type> type;
475 template<typename Typelist_Typelist>
479 typedef typename Typelist_Typelist::root root_type;
480 typedef typename detail::chain_flatten_<root_type>::type flatten_type;
483 typedef node<flatten_type> type;
486 template<typename Typelist>
490 typedef typename at_index<Typelist, 0>::type first_type;
493 typedef node<chain<first_type, null_type> > type;
496 template<typename T1>
499 typedef node<_GLIBCXX_TYPELIST_CHAIN1(T1)> type;
502 template<typename T1, typename T2>
505 typedef node<_GLIBCXX_TYPELIST_CHAIN2(T1,T2)> type;
508 template<typename T1, typename T2, typename T3>
511 typedef node<_GLIBCXX_TYPELIST_CHAIN3(T1,T2,T3)> type;
514 template<typename T1, typename T2, typename T3, typename T4>
517 typedef node<_GLIBCXX_TYPELIST_CHAIN4(T1,T2,T3,T4)> type;
520 template<typename T1, typename T2, typename T3,
521 typename T4, typename T5>
524 typedef node<_GLIBCXX_TYPELIST_CHAIN5(T1,T2,T3,T4,T5)> type;
527 template<typename T1, typename T2, typename T3,
528 typename T4, typename T5, typename T6>
531 typedef node<_GLIBCXX_TYPELIST_CHAIN6(T1,T2,T3,T4,T5,T6)> type;
533 } // namespace typelist
534 _GLIBCXX_END_NAMESPACE_VERSION