3 // Copyright (C) 2005, 2006, 2008, 2009 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.
37 * Contains typelist_chain definitions.
38 * Typelists are an idea by Andrei Alexandrescu.
44 #include <ext/type_traits.h>
46 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
48 /** @namespace __gnu_cxx::typelist
49 * @brief GNU typelist extensions for public compile-time use.
55 template<typename Root>
61 // Forward declarations of functors.
62 template<typename Hd, typename Typelist>
66 typedef Typelist tail;
69 // Apply all typelist types to unary functor.
70 template<typename Fn, typename Typelist>
74 /// Apply all typelist types to generator functor.
75 template<typename Gn, typename Typelist>
77 apply_generator(Gn&, Typelist);
79 // Apply all typelist types and values to generator functor.
80 template<typename Gn, typename TypelistT, typename TypelistV>
82 apply_generator(Gn&, TypelistT, TypelistV);
84 template<typename Typelist0, typename Typelist1>
87 template<typename Typelist_Typelist>
88 struct append_typelist;
90 template<typename Typelist, typename T>
93 template<typename Typelist, template<typename T> class Pred>
96 template<typename Typelist, int i>
99 template<typename Typelist, template<typename T> class Transform>
102 template<typename Typelist_Typelist>
105 template<typename Typelist>
108 template<typename T1>
111 template<typename T1, typename T2>
114 template<typename T1, typename T2, typename T3>
117 template<typename T1, typename T2, typename T3, typename T4>
120 template<typename T1, typename T2, typename T3, typename T4, typename T5>
123 template<typename T1, typename T2, typename T3,
124 typename T4, typename T5, typename T6>
126 } // namespace typelist
128 _GLIBCXX_END_NAMESPACE
131 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
137 template<typename Fn, typename Typelist_Chain>
140 template<typename Fn, typename Hd, typename Tl>
141 struct apply_<Fn, chain<Hd, Tl> >
152 template<typename Fn>
153 struct apply_<Fn, null_type>
159 template<typename Gn, typename Typelist_Chain>
160 struct apply_generator1_;
162 template<typename Gn, typename Hd, typename Tl>
163 struct apply_generator1_<Gn, chain<Hd, Tl> >
168 g.template operator()<Hd>();
169 apply_generator1_<Gn, Tl> next;
174 template<typename Gn>
175 struct apply_generator1_<Gn, null_type>
181 template<typename Gn, typename TypelistT_Chain, typename TypelistV_Chain>
182 struct apply_generator2_;
184 template<typename Gn, typename Hd1, typename TlT, typename Hd2, typename TlV>
185 struct apply_generator2_<Gn, chain<Hd1, TlT>, chain<Hd2, TlV> >
190 g.template operator()<Hd1, Hd2>();
191 apply_generator2_<Gn, TlT, TlV> next;
196 template<typename Gn>
197 struct apply_generator2_<Gn, null_type, null_type>
203 template<typename Typelist_Chain0, typename Typelist_Chain1>
206 template<typename Hd, typename Tl, typename Typelist_Chain>
207 struct append_<chain<Hd, Tl>, Typelist_Chain>
210 typedef append_<Tl, Typelist_Chain> append_type;
213 typedef chain<Hd, typename append_type::type> type;
216 template<typename Typelist_Chain>
217 struct append_<null_type, Typelist_Chain>
219 typedef Typelist_Chain type;
222 template<typename Typelist_Chain>
223 struct append_<Typelist_Chain, null_type>
225 typedef Typelist_Chain type;
229 struct append_<null_type, null_type>
231 typedef null_type type;
234 template<typename Typelist_Typelist_Chain>
235 struct append_typelist_;
237 template<typename Hd>
238 struct append_typelist_<chain<Hd, null_type> >
240 typedef chain<Hd, null_type> type;
243 template<typename Hd, typename Tl>
244 struct append_typelist_<chain< Hd, Tl> >
247 typedef typename append_typelist_<Tl>::type rest_type;
250 typedef typename append<Hd, node<rest_type> >::type::root type;
253 template<typename Typelist_Chain, typename T>
257 struct contains_<null_type, T>
265 template<typename Hd, typename Tl, typename T>
266 struct contains_<chain<Hd, Tl>, T>
270 value = contains_<Tl, T>::value
274 template<typename Tl, typename T>
275 struct contains_<chain<T, Tl>, T>
283 template<typename Typelist_Chain, template<typename T> class Pred>
284 struct chain_filter_;
286 template<template<typename T> class Pred>
287 struct chain_filter_<null_type, Pred>
289 typedef null_type type;
292 template<typename Hd, typename Tl, template<typename T> class Pred>
293 struct chain_filter_<chain<Hd, Tl>, Pred>
298 include_hd = Pred<Hd>::value
301 typedef typename chain_filter_<Tl, Pred>::type rest_type;
302 typedef chain<Hd, rest_type> chain_type;
305 typedef typename __conditional_type<include_hd, chain_type, rest_type>::__type type;
308 template<typename Typelist_Chain, int i>
309 struct chain_at_index_;
311 template<typename Hd, typename Tl>
312 struct chain_at_index_<chain<Hd, Tl>, 0>
317 template<typename Hd, typename Tl, int i>
318 struct chain_at_index_<chain<Hd, Tl>, i>
320 typedef typename chain_at_index_<Tl, i - 1>::type type;
323 template<class Typelist_Chain, template<typename T> class Transform>
324 struct chain_transform_;
326 template<template<typename T> class Transform>
327 struct chain_transform_<null_type, Transform>
329 typedef null_type type;
332 template<class Hd, class Tl, template<typename T> class Transform>
333 struct chain_transform_<chain<Hd, Tl>, Transform>
336 typedef typename chain_transform_<Tl, Transform>::type rest_type;
337 typedef typename Transform<Hd>::type transform_type;
340 typedef chain<transform_type, rest_type> type;
343 template<typename Typelist_Typelist_Chain>
344 struct chain_flatten_;
346 template<typename Hd_Tl>
347 struct chain_flatten_<chain<Hd_Tl, null_type> >
349 typedef typename Hd_Tl::root type;
352 template<typename Hd_Typelist, class Tl_Typelist>
353 struct chain_flatten_<chain<Hd_Typelist, Tl_Typelist> >
356 typedef typename chain_flatten_<Tl_Typelist>::type rest_type;
357 typedef append<Hd_Typelist, node<rest_type> > append_type;
359 typedef typename append_type::type::root type;
361 } // namespace detail
362 } // namespace typelist
364 _GLIBCXX_END_NAMESPACE
366 #define _GLIBCXX_TYPELIST_CHAIN1(X0) __gnu_cxx::typelist::chain<X0, __gnu_cxx::typelist::null_type>
367 #define _GLIBCXX_TYPELIST_CHAIN2(X0, X1) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN1(X1) >
368 #define _GLIBCXX_TYPELIST_CHAIN3(X0, X1, X2) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN2(X1, X2) >
369 #define _GLIBCXX_TYPELIST_CHAIN4(X0, X1, X2, X3) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN3(X1, X2, X3) >
370 #define _GLIBCXX_TYPELIST_CHAIN5(X0, X1, X2, X3, X4) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN4(X1, X2, X3, X4) >
371 #define _GLIBCXX_TYPELIST_CHAIN6(X0, X1, X2, X3, X4, X5) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN5(X1, X2, X3, X4, X5) >
372 #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) >
373 #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) >
374 #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) >
375 #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) >
376 #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) >
377 #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) >
378 #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) >
379 #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) >
380 #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) >
382 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
386 template<typename Fn, typename Typelist>
388 apply(Fn& fn, Typelist)
390 detail::apply_<Fn, typename Typelist::root> a;
394 template<typename Fn, typename Typelist>
396 apply_generator(Fn& fn, Typelist)
398 detail::apply_generator1_<Fn, typename Typelist::root> a;
402 template<typename Fn, typename TypelistT, typename TypelistV>
404 apply_generator(Fn& fn, TypelistT, TypelistV)
406 typedef typename TypelistT::root rootT;
407 typedef typename TypelistV::root rootV;
408 detail::apply_generator2_<Fn, rootT, rootV> a;
412 template<typename Typelist0, typename Typelist1>
416 typedef typename Typelist0::root root0_type;
417 typedef typename Typelist1::root root1_type;
418 typedef detail::append_<root0_type, root1_type> append_type;
421 typedef node<typename append_type::type> type;
424 template<typename Typelist_Typelist>
425 struct append_typelist
428 typedef typename Typelist_Typelist::root root_type;
429 typedef detail::append_typelist_<root_type> append_type;
432 typedef node<typename append_type::type> type;
435 template<typename Typelist, typename T>
439 typedef typename Typelist::root root_type;
444 value = detail::contains_<root_type, T>::value
448 template<typename Typelist, template<typename T> class Pred>
452 typedef typename Typelist::root root_type;
453 typedef detail::chain_filter_<root_type, Pred> filter_type;
456 typedef node<typename filter_type::type> type;
459 template<typename Typelist, int i>
463 typedef typename Typelist::root root_type;
464 typedef detail::chain_at_index_<root_type, i> index_type;
467 typedef typename index_type::type type;
470 template<typename Typelist, template<typename T> class Transform>
474 typedef typename Typelist::root root_type;
475 typedef detail::chain_transform_<root_type, Transform> transform_type;
478 typedef node<typename transform_type::type> type;
481 template<typename Typelist_Typelist>
485 typedef typename Typelist_Typelist::root root_type;
486 typedef typename detail::chain_flatten_<root_type>::type flatten_type;
489 typedef node<flatten_type> type;
492 template<typename Typelist>
496 typedef typename at_index<Typelist, 0>::type first_type;
499 typedef node<chain<first_type, null_type> > type;
502 template<typename T1>
505 typedef node<_GLIBCXX_TYPELIST_CHAIN1(T1)> type;
508 template<typename T1, typename T2>
511 typedef node<_GLIBCXX_TYPELIST_CHAIN2(T1,T2)> type;
514 template<typename T1, typename T2, typename T3>
517 typedef node<_GLIBCXX_TYPELIST_CHAIN3(T1,T2,T3)> type;
520 template<typename T1, typename T2, typename T3, typename T4>
523 typedef node<_GLIBCXX_TYPELIST_CHAIN4(T1,T2,T3,T4)> type;
526 template<typename T1, typename T2, typename T3,
527 typename T4, typename T5>
530 typedef node<_GLIBCXX_TYPELIST_CHAIN5(T1,T2,T3,T4,T5)> type;
533 template<typename T1, typename T2, typename T3,
534 typename T4, typename T5, typename T6>
537 typedef node<_GLIBCXX_TYPELIST_CHAIN6(T1,T2,T3,T4,T5,T6)> type;
539 } // namespace typelist
540 _GLIBCXX_END_NAMESPACE