3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
32 // Permission to use, copy, modify, sell, and distribute this software
33 // is hereby granted without fee, provided that the above copyright
34 // notice appears in all copies, and that both that copyright notice and
35 // this permission notice appear in supporting documentation. None of
36 // the above authors, nor IBM Haifa Research Laboratories, make any
37 // representation about the suitability of this software for any
38 // purpose. It is provided "as is" without express or implied warranty.
42 * Contains typelist_chain definitions.
43 * Typelists are an idea by Andrei Alexandrescu.
49 #include <ext/type_traits.h>
51 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
53 /** @namespace __gnu_cxx::typelist
54 * @brief GNU typelist extensions for public compile-time use.
60 template<typename Root>
66 // Forward declarations of functors.
67 template<typename Hd, typename Typelist>
71 typedef Typelist tail;
74 template<typename Fn, class Typelist>
78 template<typename Typelist0, typename Typelist1>
81 template<typename Typelist_Typelist>
82 struct append_typelist;
84 template<typename Typelist, typename T>
87 template<typename Typelist, template<typename T> class Pred>
90 template<typename Typelist, int i>
93 template<typename Typelist, template<typename T> class Transform>
96 template<typename Typelist_Typelist>
99 template<typename Typelist>
102 template<typename T1>
105 template<typename T1, typename T2>
108 template<typename T1, typename T2, typename T3>
111 template<typename T1, typename T2, typename T3, typename T4>
114 template<typename T1, typename T2, typename T3, typename T4, typename T5>
117 template<typename T1, typename T2, typename T3,
118 typename T4, typename T5, typename T6>
120 } // namespace typelist
122 _GLIBCXX_END_NAMESPACE
125 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
131 template<typename Fn, typename Typelist_Chain>
134 template<typename Fn, typename Hd, typename Tl>
135 struct apply_<Fn, chain<Hd, Tl> >
146 template<typename Fn>
147 struct apply_<Fn, null_type>
153 template<typename Typelist_Chain0, typename Typelist_Chain1>
156 template<typename Hd, typename Tl, typename Typelist_Chain>
157 struct append_<chain<Hd, Tl>, Typelist_Chain>
160 typedef append_<Tl, Typelist_Chain> append_type;
163 typedef chain<Hd, typename append_type::type> type;
166 template<typename Typelist_Chain>
167 struct append_<null_type, Typelist_Chain>
169 typedef Typelist_Chain type;
172 template<typename Typelist_Chain>
173 struct append_<Typelist_Chain, null_type>
175 typedef Typelist_Chain type;
179 struct append_<null_type, null_type>
181 typedef null_type type;
184 template<typename Typelist_Typelist_Chain>
185 struct append_typelist_;
187 template<typename Hd>
188 struct append_typelist_<chain<Hd, null_type> >
190 typedef chain<Hd, null_type> type;
193 template<typename Hd, typename Tl>
194 struct append_typelist_<chain< Hd, Tl> >
197 typedef typename append_typelist_<Tl>::type rest_type;
200 typedef typename append<Hd, node<rest_type> >::type::root type;
203 template<typename Typelist_Chain, typename T>
207 struct contains_<null_type, T>
215 template<typename Hd, typename Tl, typename T>
216 struct contains_<chain<Hd, Tl>, T>
220 value = contains_<Tl, T>::value
224 template<typename Tl, typename T>
225 struct contains_<chain<T, Tl>, T>
233 template<typename Typelist_Chain, template<typename T> class Pred>
234 struct chain_filter_;
236 template<template<typename T> class Pred>
237 struct chain_filter_<null_type, Pred>
239 typedef null_type type;
242 template<typename Hd, typename Tl, template<typename T> class Pred>
243 struct chain_filter_<chain<Hd, Tl>, Pred>
248 include_hd = Pred<Hd>::value
251 typedef typename chain_filter_<Tl, Pred>::type rest_type;
252 typedef chain<Hd, rest_type> chain_type;
255 typedef typename __conditional_type<include_hd, chain_type, rest_type>::__type type;
258 template<typename Typelist_Chain, int i>
259 struct chain_at_index_;
261 template<typename Hd, typename Tl>
262 struct chain_at_index_<chain<Hd, Tl>, 0>
267 template<typename Hd, typename Tl, int i>
268 struct chain_at_index_<chain<Hd, Tl>, i>
270 typedef typename chain_at_index_<Tl, i - 1>::type type;
273 template<class Typelist_Chain, template<typename T> class Transform>
274 struct chain_transform_;
276 template<template<typename T> class Transform>
277 struct chain_transform_<null_type, Transform>
279 typedef null_type type;
282 template<class Hd, class Tl, template<typename T> class Transform>
283 struct chain_transform_<chain<Hd, Tl>, Transform>
286 typedef typename chain_transform_<Tl, Transform>::type rest_type;
287 typedef typename Transform<Hd>::type transform_type;
290 typedef chain<transform_type, rest_type> type;
293 template<typename Typelist_Typelist_Chain>
294 struct chain_flatten_;
296 template<typename Hd_Tl>
297 struct chain_flatten_<chain<Hd_Tl, null_type> >
299 typedef typename Hd_Tl::root type;
302 template<typename Hd_Typelist, class Tl_Typelist>
303 struct chain_flatten_<chain<Hd_Typelist, Tl_Typelist> >
306 typedef typename chain_flatten_<Tl_Typelist>::type rest_type;
307 typedef append<Hd_Typelist, node<rest_type> > append_type;
309 typedef typename append_type::type::root type;
311 } // namespace detail
312 } // namespace typelist
314 _GLIBCXX_END_NAMESPACE
316 #define _GLIBCXX_TYPELIST_CHAIN1(X0) __gnu_cxx::typelist::chain<X0, __gnu_cxx::typelist::null_type>
317 #define _GLIBCXX_TYPELIST_CHAIN2(X0, X1) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN1(X1) >
318 #define _GLIBCXX_TYPELIST_CHAIN3(X0, X1, X2) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN2(X1, X2) >
319 #define _GLIBCXX_TYPELIST_CHAIN4(X0, X1, X2, X3) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN3(X1, X2, X3) >
320 #define _GLIBCXX_TYPELIST_CHAIN5(X0, X1, X2, X3, X4) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN4(X1, X2, X3, X4) >
321 #define _GLIBCXX_TYPELIST_CHAIN6(X0, X1, X2, X3, X4, X5) __gnu_cxx::typelist::chain<X0, _GLIBCXX_TYPELIST_CHAIN5(X1, X2, X3, X4, X5) >
322 #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) >
323 #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) >
324 #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) >
325 #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) >
326 #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) >
327 #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) >
328 #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) >
329 #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) >
330 #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) >
332 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
336 template<typename Fn, class Typelist>
338 apply(Fn& fn, Typelist)
340 detail::apply_<Fn, typename Typelist::root> a;
344 template<typename Typelist0, typename Typelist1>
348 typedef typename Typelist0::root root0_type;
349 typedef typename Typelist1::root root1_type;
350 typedef detail::append_<root0_type, root1_type> append_type;
353 typedef node<typename append_type::type> type;
356 template<typename Typelist_Typelist>
357 struct append_typelist
360 typedef typename Typelist_Typelist::root root_type;
361 typedef detail::append_typelist_<root_type> append_type;
364 typedef node<typename append_type::type> type;
367 template<typename Typelist, typename T>
371 typedef typename Typelist::root root_type;
376 value = detail::contains_<root_type, T>::value
380 template<typename Typelist, template<typename T> class Pred>
384 typedef typename Typelist::root root_type;
385 typedef detail::chain_filter_<root_type, Pred> filter_type;
388 typedef node<typename filter_type::type> type;
391 template<typename Typelist, int i>
395 typedef typename Typelist::root root_type;
396 typedef detail::chain_at_index_<root_type, i> index_type;
399 typedef typename index_type::type type;
402 template<typename Typelist, template<typename T> class Transform>
406 typedef typename Typelist::root root_type;
407 typedef detail::chain_transform_<root_type, Transform> transform_type;
410 typedef node<typename transform_type::type> type;
413 template<typename Typelist_Typelist>
417 typedef typename Typelist_Typelist::root root_type;
418 typedef typename detail::chain_flatten_<root_type>::type flatten_type;
421 typedef node<flatten_type> type;
424 template<typename Typelist>
428 typedef typename at_index<Typelist, 0>::type first_type;
431 typedef node<chain<first_type, null_type> > type;
434 template<typename T1>
437 typedef node<_GLIBCXX_TYPELIST_CHAIN1(T1)> type;
440 template<typename T1, typename T2>
443 typedef node<_GLIBCXX_TYPELIST_CHAIN2(T1,T2)> type;
446 template<typename T1, typename T2, typename T3>
449 typedef node<_GLIBCXX_TYPELIST_CHAIN3(T1,T2,T3)> type;
452 template<typename T1, typename T2, typename T3, typename T4>
455 typedef node<_GLIBCXX_TYPELIST_CHAIN4(T1,T2,T3,T4)> type;
458 template<typename T1, typename T2, typename T3,
459 typename T4, typename T5>
462 typedef node<_GLIBCXX_TYPELIST_CHAIN5(T1,T2,T3,T4,T5)> type;
465 template<typename T1, typename T2, typename T3,
466 typename T4, typename T5, typename T6>
469 typedef node<_GLIBCXX_TYPELIST_CHAIN6(T1,T2,T3,T4,T5,T6)> type;
471 } // namespace typelist
472 _GLIBCXX_END_NAMESPACE