1 #ifndef BOOST_MP11_ALGORITHM_HPP_INCLUDED
2 #define BOOST_MP11_ALGORITHM_HPP_INCLUDED
4 // Copyright 2015-2019 Peter Dimov
6 // Distributed under the Boost Software License, Version 1.0.
8 // See accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt
11 #include <boost/mp11/list.hpp>
12 #include <boost/mp11/set.hpp>
13 #include <boost/mp11/integral.hpp>
14 #include <boost/mp11/utility.hpp>
15 #include <boost/mp11/function.hpp>
16 #include <boost/mp11/detail/mp_count.hpp>
17 #include <boost/mp11/detail/mp_plus.hpp>
18 #include <boost/mp11/detail/mp_map_find.hpp>
19 #include <boost/mp11/detail/mp_with_index.hpp>
20 #include <boost/mp11/detail/mp_fold.hpp>
21 #include <boost/mp11/detail/mp_min_element.hpp>
22 #include <boost/mp11/detail/mp_copy_if.hpp>
23 #include <boost/mp11/detail/mp_remove_if.hpp>
24 #include <boost/mp11/detail/config.hpp>
25 #include <boost/mp11/integer_sequence.hpp>
26 #include <type_traits>
34 // mp_transform<F, L...>
38 template<template<class...> class F, class... L> struct mp_transform_impl
42 template<template<class...> class F, template<class...> class L, class... T> struct mp_transform_impl<F, L<T...>>
44 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
46 template<class... U> struct f { using type = F<U...>; };
48 using type = L<typename f<T>::type...>;
52 using type = L<F<T>...>;
57 template<template<class...> class F, template<class...> class L1, class... T1, template<class...> class L2, class... T2> struct mp_transform_impl<F, L1<T1...>, L2<T2...>>
59 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
61 template<class... U> struct f { using type = F<U...>; };
63 using type = L1<typename f<T1, T2>::type...>;
67 using type = L1<F<T1,T2>...>;
72 template<template<class...> class F, template<class...> class L1, class... T1, template<class...> class L2, class... T2, template<class...> class L3, class... T3> struct mp_transform_impl<F, L1<T1...>, L2<T2...>, L3<T3...>>
74 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
76 template<class... U> struct f { using type = F<U...>; };
78 using type = L1<typename f<T1, T2, T3>::type...>;
82 using type = L1<F<T1,T2,T3>...>;
87 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, == 1900 ) || BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, < 40800 )
89 template<class... L> using mp_same_size_1 = mp_same<mp_size<L>...>;
90 template<class... L> struct mp_same_size_2: mp_defer<mp_same_size_1, L...> {};
94 struct list_size_mismatch
98 #if BOOST_MP11_WORKAROUND( BOOST_MP11_CUDA, >= 9000000 && BOOST_MP11_CUDA < 10000000 )
100 template<template<class...> class F, class... L> struct mp_transform_cuda_workaround
102 using type = mp_if<mp_same<mp_size<L>...>, detail::mp_transform_impl<F, L...>, detail::list_size_mismatch>;
107 } // namespace detail
109 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, == 1900 ) || BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, < 40800 )
111 template<template<class...> class F, class... L> using mp_transform = typename mp_if<typename detail::mp_same_size_2<L...>::type, detail::mp_transform_impl<F, L...>, detail::list_size_mismatch>::type;
115 #if BOOST_MP11_WORKAROUND( BOOST_MP11_CUDA, >= 9000000 && BOOST_MP11_CUDA < 10000000 )
117 template<template<class...> class F, class... L> using mp_transform = typename detail::mp_transform_cuda_workaround< F, L...>::type::type;
121 template<template<class...> class F, class... L> using mp_transform = typename mp_if<mp_same<mp_size<L>...>, detail::mp_transform_impl<F, L...>, detail::list_size_mismatch>::type;
127 template<class Q, class... L> using mp_transform_q = mp_transform<Q::template fn, L...>;
132 template<template<class...> class F, template<class...> class L1, class... T1, template<class...> class L2, class... T2, template<class...> class L3, class... T3, template<class...> class L4, class... T4, class... L> struct mp_transform_impl<F, L1<T1...>, L2<T2...>, L3<T3...>, L4<T4...>, L...>
134 using A1 = L1<mp_list<T1, T2, T3, T4>...>;
136 template<class V, class T> using _f = mp_transform<mp_push_back, V, T>;
138 using A2 = mp_fold<mp_list<L...>, A1, _f>;
140 template<class T> using _g = mp_apply<F, T>;
142 using type = mp_transform<_g, A2>;
145 } // namespace detail
147 // mp_transform_if<P, F, L...>
151 template<template<class...> class P, template<class...> class F, class... L> struct mp_transform_if_impl
153 // the stupid quote-unquote dance avoids "pack expansion used as argument for non-pack parameter of alias template"
155 using Qp = mp_quote<P>;
156 using Qf = mp_quote<F>;
158 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
160 template<class... U> struct _f_ { using type = mp_eval_if_q<mp_not<mp_invoke_q<Qp, U...>>, mp_first<mp_list<U...>>, Qf, U...>; };
161 template<class... U> using _f = typename _f_<U...>::type;
165 template<class... U> using _f = mp_eval_if_q<mp_not<mp_invoke_q<Qp, U...>>, mp_first<mp_list<U...>>, Qf, U...>;
169 using type = mp_transform<_f, L...>;
172 } // namespace detail
174 template<template<class...> class P, template<class...> class F, class... L> using mp_transform_if = typename detail::mp_transform_if_impl<P, F, L...>::type;
175 template<class Qp, class Qf, class... L> using mp_transform_if_q = typename detail::mp_transform_if_impl<Qp::template fn, Qf::template fn, L...>::type;
177 // mp_filter<P, L...>
181 template<template<class...> class P, class L1, class... L> struct mp_filter_impl
183 using Qp = mp_quote<P>;
185 template<class T1, class... T> using _f = mp_if< mp_invoke_q<Qp, T1, T...>, mp_list<T1>, mp_list<> >;
187 using _t1 = mp_transform<_f, L1, L...>;
188 using _t2 = mp_apply<mp_append, _t1>;
190 using type = mp_assign<L1, _t2>;
193 } // namespace detail
195 template<template<class...> class P, class... L> using mp_filter = typename detail::mp_filter_impl<P, L...>::type;
196 template<class Q, class... L> using mp_filter_q = typename detail::mp_filter_impl<Q::template fn, L...>::type;
202 template<class L, class V> struct mp_fill_impl;
204 template<template<class...> class L, class... T, class V> struct mp_fill_impl<L<T...>, V>
206 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1900 )
208 template<class...> struct _f { using type = V; };
209 using type = L<typename _f<T>::type...>;
213 template<class...> using _f = V;
214 using type = L<_f<T>...>;
219 } // namespace detail
221 template<class L, class V> using mp_fill = typename detail::mp_fill_impl<L, V>::type;
224 template<class L, class V> using mp_contains = mp_to_bool<mp_count<L, V>>;
226 // mp_repeat(_c)<L, N>
230 template<class L, std::size_t N> struct mp_repeat_c_impl
232 using _l1 = typename mp_repeat_c_impl<L, N/2>::type;
233 using _l2 = typename mp_repeat_c_impl<L, N%2>::type;
235 using type = mp_append<_l1, _l1, _l2>;
238 template<class L> struct mp_repeat_c_impl<L, 0>
240 using type = mp_clear<L>;
243 template<class L> struct mp_repeat_c_impl<L, 1>
248 } // namespace detail
250 template<class L, std::size_t N> using mp_repeat_c = typename detail::mp_repeat_c_impl<L, N>::type;
251 template<class L, class N> using mp_repeat = typename detail::mp_repeat_c_impl<L, std::size_t{ N::value }>::type;
253 // mp_product<F, L...>
257 template<template<class...> class F, class P, class... L> struct mp_product_impl_2;
259 template<template<class...> class F, class P> struct mp_product_impl_2<F, P>
261 using type = mp_list<mp_rename<P, F>>;
264 template<template<class...> class F, class P, template<class...> class L1, class... T1, class... L> struct mp_product_impl_2<F, P, L1<T1...>, L...>
266 using type = mp_append<typename mp_product_impl_2<F, mp_push_back<P, T1>, L...>::type...>;
269 template<template<class...> class F, class... L> struct mp_product_impl;
271 template<template<class...> class F, class L1, class... L> struct mp_product_impl<F, L1, L...>
273 using type = mp_assign<L1, typename mp_product_impl_2<F, mp_list<>, L1, L...>::type>;
276 } // namespace detail
278 template<template<class...> class F, class... L> using mp_product = typename detail::mp_product_impl<F, L...>::type;
279 template<class Q, class... L> using mp_product_q = typename detail::mp_product_impl<Q::template fn, L...>::type;
285 template<class L, class L2> struct mp_drop_impl;
287 template<template<class...> class L, class... T, template<class...> class L2, class... U> struct mp_drop_impl<L<T...>, L2<U...>>
289 template<class... W> static mp_identity<L<W...>> f( U*..., mp_identity<W>*... );
291 using R = decltype( f( (mp_identity<T>*)0 ... ) );
293 using type = typename R::type;
296 } // namespace detail
298 template<class L, std::size_t N> using mp_drop_c = typename detail::mp_drop_impl<L, mp_repeat_c<mp_list<void>, N>>::type;
300 template<class L, class N> using mp_drop = typename detail::mp_drop_impl<L, mp_repeat<mp_list<void>, N>>::type;
302 // mp_from_sequence<S>
306 template<class S> struct mp_from_sequence_impl;
308 template<template<class T, T... I> class S, class U, U... J> struct mp_from_sequence_impl<S<U, J...>>
310 using type = mp_list<std::integral_constant<U, J>...>;
313 } // namespace detail
315 template<class S> using mp_from_sequence = typename detail::mp_from_sequence_impl<S>::type;
318 template<std::size_t N> using mp_iota_c = mp_from_sequence<make_index_sequence<N>>;
319 template<class N> using mp_iota = mp_from_sequence<make_integer_sequence<typename std::remove_const<decltype(N::value)>::type, N::value>>;
325 template<class L, std::size_t I> struct mp_at_c_impl;
327 #if defined(BOOST_MP11_HAS_TYPE_PACK_ELEMENT)
329 template<template<class...> class L, class... T, std::size_t I> struct mp_at_c_impl<L<T...>, I>
331 using type = __type_pack_element<I, T...>;
336 template<class L, std::size_t I> struct mp_at_c_impl
338 using _map = mp_transform<mp_list, mp_iota<mp_size<L> >, L>;
339 using type = mp_second<mp_map_find<_map, mp_size_t<I> > >;
344 #if BOOST_MP11_WORKAROUND( BOOST_MP11_CUDA, >= 9000000 && BOOST_MP11_CUDA < 10000000 )
346 template<class L, std::size_t I> struct mp_at_c_cuda_workaround
348 using type = mp_if_c<(I < mp_size<L>::value), detail::mp_at_c_impl<L, I>, void>;
353 } // namespace detail
355 #if BOOST_MP11_WORKAROUND( BOOST_MP11_CUDA, >= 9000000 && BOOST_MP11_CUDA < 10000000 )
357 template<class L, std::size_t I> using mp_at_c = typename detail::mp_at_c_cuda_workaround< L, I >::type::type;
361 template<class L, std::size_t I> using mp_at_c = typename mp_if_c<(I < mp_size<L>::value), detail::mp_at_c_impl<L, I>, void>::type;
365 template<class L, class I> using mp_at = mp_at_c<L, std::size_t{ I::value }>;
371 template<std::size_t N, class L, class E = void> struct mp_take_c_impl
375 template<template<class...> class L, class... T>
376 struct mp_take_c_impl<0, L<T...>>
381 template<template<class...> class L, class T1, class... T>
382 struct mp_take_c_impl<1, L<T1, T...>>
387 template<template<class...> class L, class T1, class T2, class... T>
388 struct mp_take_c_impl<2, L<T1, T2, T...>>
390 using type = L<T1, T2>;
393 template<template<class...> class L, class T1, class T2, class T3, class... T>
394 struct mp_take_c_impl<3, L<T1, T2, T3, T...>>
396 using type = L<T1, T2, T3>;
399 template<template<class...> class L, class T1, class T2, class T3, class T4, class... T>
400 struct mp_take_c_impl<4, L<T1, T2, T3, T4, T...>>
402 using type = L<T1, T2, T3, T4>;
405 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class... T>
406 struct mp_take_c_impl<5, L<T1, T2, T3, T4, T5, T...>>
408 using type = L<T1, T2, T3, T4, T5>;
411 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class... T>
412 struct mp_take_c_impl<6, L<T1, T2, T3, T4, T5, T6, T...>>
414 using type = L<T1, T2, T3, T4, T5, T6>;
417 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class... T>
418 struct mp_take_c_impl<7, L<T1, T2, T3, T4, T5, T6, T7, T...>>
420 using type = L<T1, T2, T3, T4, T5, T6, T7>;
423 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class... T>
424 struct mp_take_c_impl<8, L<T1, T2, T3, T4, T5, T6, T7, T8, T...>>
426 using type = L<T1, T2, T3, T4, T5, T6, T7, T8>;
429 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class... T>
430 struct mp_take_c_impl<9, L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T...>>
432 using type = L<T1, T2, T3, T4, T5, T6, T7, T8, T9>;
435 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T, std::size_t N>
436 struct mp_take_c_impl<N, L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>, typename std::enable_if<N >= 10>::type>
438 using type = mp_append<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>, typename mp_take_c_impl<N-10, L<T...>>::type>;
441 } // namespace detail
443 template<class L, std::size_t N> using mp_take_c = typename detail::mp_take_c_impl<N, L>::type;
444 template<class L, class N> using mp_take = typename detail::mp_take_c_impl<std::size_t{ N::value }, L>::type;
447 template<class L> using mp_back = mp_at_c<L, mp_size<L>::value - 1>;
450 template<class L> using mp_pop_back = mp_take_c<L, mp_size<L>::value - 1>;
452 // mp_replace<L, V, W>
456 template<class L, class V, class W> struct mp_replace_impl;
458 template<template<class...> class L, class... T, class V, class W> struct mp_replace_impl<L<T...>, V, W>
460 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
461 template<class A> struct _f { using type = mp_if<std::is_same<A, V>, W, A>; };
462 using type = L<typename _f<T>::type...>;
464 template<class A> using _f = mp_if<std::is_same<A, V>, W, A>;
465 using type = L<_f<T>...>;
469 } // namespace detail
471 template<class L, class V, class W> using mp_replace = typename detail::mp_replace_impl<L, V, W>::type;
473 // mp_replace_if<L, P, W>
477 template<class L, template<class...> class P, class W> struct mp_replace_if_impl;
479 template<template<class...> class L, class... T, template<class...> class P, class W> struct mp_replace_if_impl<L<T...>, P, W>
481 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
482 template<class U> struct _f { using type = mp_if<P<U>, W, U>; };
483 using type = L<typename _f<T>::type...>;
485 template<class U> using _f = mp_if<P<U>, W, U>;
486 using type = L<_f<T>...>;
490 } // namespace detail
492 template<class L, template<class...> class P, class W> using mp_replace_if = typename detail::mp_replace_if_impl<L, P, W>::type;
493 template<class L, class Q, class W> using mp_replace_if_q = mp_replace_if<L, Q::template fn, W>;
496 // in detail/mp_copy_if.hpp
502 template<class L, class V> struct mp_remove_impl;
504 template<template<class...> class L, class... T, class V> struct mp_remove_impl<L<T...>, V>
506 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1920 )
507 template<class U> struct _f { using type = mp_if<std::is_same<U, V>, mp_list<>, mp_list<U>>; };
508 using type = mp_append<L<>, typename _f<T>::type...>;
510 template<class U> using _f = mp_if<std::is_same<U, V>, mp_list<>, mp_list<U>>;
511 using type = mp_append<L<>, _f<T>...>;
515 } // namespace detail
517 template<class L, class V> using mp_remove = typename detail::mp_remove_impl<L, V>::type;
519 // mp_remove_if<L, P>
520 // in detail/mp_remove_if.hpp
522 // mp_partition<L, P>
526 template<class L, template<class...> class P> struct mp_partition_impl;
528 template<template<class...> class L, class... T, template<class...> class P> struct mp_partition_impl<L<T...>, P>
530 using type = L<mp_copy_if<L<T...>, P>, mp_remove_if<L<T...>, P>>;
533 } // namespace detail
535 template<class L, template<class...> class P> using mp_partition = typename detail::mp_partition_impl<L, P>::type;
536 template<class L, class Q> using mp_partition_q = mp_partition<L, Q::template fn>;
542 template<class L, template<class...> class P> struct mp_sort_impl;
544 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
546 template<template<class...> class L, class... T, template<class...> class P> struct mp_sort_impl<L<T...>, P>
548 static_assert( sizeof...(T) == 0, "T... must be empty" );
554 template<template<class...> class L, template<class...> class P> struct mp_sort_impl<L<>, P>
561 template<template<class...> class L, class T1, template<class...> class P> struct mp_sort_impl<L<T1>, P>
566 template<template<class...> class L, class T1, class... T, template<class...> class P> struct mp_sort_impl<L<T1, T...>, P>
568 template<class U> using F = P<U, T1>;
570 using part = mp_partition<L<T...>, F>;
572 using S1 = typename mp_sort_impl<mp_first<part>, P>::type;
573 using S2 = typename mp_sort_impl<mp_second<part>, P>::type;
575 using type = mp_append<mp_push_back<S1, T1>, S2>;
578 } // namespace detail
580 template<class L, template<class...> class P> using mp_sort = typename detail::mp_sort_impl<L, P>::type;
581 template<class L, class Q> using mp_sort_q = mp_sort<L, Q::template fn>;
583 // mp_nth_element(_c)<L, I, P>
587 template<class L, std::size_t I, template<class...> class P> struct mp_nth_element_impl;
589 template<template<class...> class L, class T1, std::size_t I, template<class...> class P> struct mp_nth_element_impl<L<T1>, I, P>
591 static_assert( I == 0, "mp_nth_element index out of range" );
595 template<template<class...> class L, class T1, class... T, std::size_t I, template<class...> class P> struct mp_nth_element_impl<L<T1, T...>, I, P>
597 static_assert( I < 1 + sizeof...(T), "mp_nth_element index out of range" );
599 template<class U> using F = P<U, T1>;
601 using part = mp_partition<L<T...>, F>;
603 using L1 = mp_first<part>;
604 static std::size_t const N1 = mp_size<L1>::value;
606 using L2 = mp_second<part>;
608 #if BOOST_MP11_WORKAROUND( BOOST_MP11_CUDA, >= 9000000 && BOOST_MP11_CUDA < 10000000 )
612 struct mp_nth_element_impl_cuda_workaround
614 using type = mp_cond<
616 mp_bool<(I < N1)>, mp_nth_element_impl<L1, I, P>,
617 mp_bool<(I == N1)>, mp_identity<T1>,
618 mp_true, mp_nth_element_impl<L2, I - N1 - 1, P>
624 using type = typename detail::mp_nth_element_impl_cuda_workaround::type::type;
628 using type = typename mp_cond<
630 mp_bool<(I < N1)>, mp_nth_element_impl<L1, I, P>,
631 mp_bool<(I == N1)>, mp_identity<T1>,
632 mp_true, mp_nth_element_impl<L2, I - N1 - 1, P>
639 } // namespace detail
641 template<class L, std::size_t I, template<class...> class P> using mp_nth_element_c = typename detail::mp_nth_element_impl<L, I, P>::type;
642 template<class L, class I, template<class...> class P> using mp_nth_element = typename detail::mp_nth_element_impl<L, std::size_t{ I::value }, P>::type;
643 template<class L, class I, class Q> using mp_nth_element_q = mp_nth_element<L, I, Q::template fn>;
649 template<class L, class V> struct mp_find_impl;
651 #if BOOST_MP11_CLANG && defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS )
653 struct mp_index_holder
659 constexpr inline mp_index_holder operator+( mp_index_holder const & v, bool f )
667 return { v.i_, true };
671 return { v.i_ + 1, false };
675 template<template<class...> class L, class... T, class V> struct mp_find_impl<L<T...>, V>
677 static constexpr mp_index_holder _v{ 0, false };
678 using type = mp_size_t< (_v + ... + std::is_same<T, V>::value).i_ >;
681 #elif !defined( BOOST_MP11_NO_CONSTEXPR )
683 template<template<class...> class L, class V> struct mp_find_impl<L<>, V>
685 using type = mp_size_t<0>;
688 #if defined( BOOST_MP11_HAS_CXX14_CONSTEXPR )
690 constexpr std::size_t cx_find_index( bool const * first, bool const * last )
694 while( first != last && !*first )
705 constexpr std::size_t cx_find_index( bool const * first, bool const * last )
707 return first == last || *first? 0: 1 + cx_find_index( first + 1, last );
712 template<template<class...> class L, class... T, class V> struct mp_find_impl<L<T...>, V>
714 static constexpr bool _v[] = { std::is_same<T, V>::value... };
715 using type = mp_size_t< cx_find_index( _v, _v + sizeof...(T) ) >;
720 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
722 template<template<class...> class L, class... T, class V> struct mp_find_impl<L<T...>, V>
724 static_assert( sizeof...(T) == 0, "T... must be empty" );
725 using type = mp_size_t<0>;
730 template<template<class...> class L, class V> struct mp_find_impl<L<>, V>
732 using type = mp_size_t<0>;
737 template<template<class...> class L, class... T, class V> struct mp_find_impl<L<V, T...>, V>
739 using type = mp_size_t<0>;
742 template<template<class...> class L, class T1, class... T, class V> struct mp_find_impl<L<T1, T...>, V>
744 using _r = typename mp_find_impl<mp_list<T...>, V>::type;
745 using type = mp_size_t<1 + _r::value>;
750 } // namespace detail
752 template<class L, class V> using mp_find = typename detail::mp_find_impl<L, V>::type;
758 template<class L, template<class...> class P> struct mp_find_if_impl;
760 #if BOOST_MP11_CLANG && defined( BOOST_MP11_HAS_FOLD_EXPRESSIONS )
762 template<template<class...> class L, class... T, template<class...> class P> struct mp_find_if_impl<L<T...>, P>
764 static constexpr mp_index_holder _v{ 0, false };
765 using type = mp_size_t< (_v + ... + P<T>::value).i_ >;
768 #elif !defined( BOOST_MP11_NO_CONSTEXPR )
770 template<template<class...> class L, template<class...> class P> struct mp_find_if_impl<L<>, P>
772 using type = mp_size_t<0>;
775 template<template<class...> class L, class... T, template<class...> class P> struct mp_find_if_impl<L<T...>, P>
777 static constexpr bool _v[] = { P<T>::value... };
778 using type = mp_size_t< cx_find_index( _v, _v + sizeof...(T) ) >;
783 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
785 template<template<class...> class L, class... T, template<class...> class P> struct mp_find_if_impl<L<T...>, P>
787 static_assert( sizeof...(T) == 0, "T... must be empty" );
788 using type = mp_size_t<0>;
793 template<template<class...> class L, template<class...> class P> struct mp_find_if_impl<L<>, P>
795 using type = mp_size_t<0>;
800 template<class L, template<class...> class P> struct mp_find_if_impl_2
802 using _r = typename mp_find_if_impl<L, P>::type;
803 using type = mp_size_t<1 + _r::value>;
806 template<template<class...> class L, class T1, class... T, template<class...> class P> struct mp_find_if_impl<L<T1, T...>, P>
808 using type = typename mp_if<P<T1>, mp_identity<mp_size_t<0>>, mp_find_if_impl_2<mp_list<T...>, P>>::type;
813 } // namespace detail
815 template<class L, template<class...> class P> using mp_find_if = typename detail::mp_find_if_impl<L, P>::type;
816 template<class L, class Q> using mp_find_if_q = mp_find_if<L, Q::template fn>;
822 template<class L> struct mp_reverse_impl;
824 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
826 template<template<class...> class L, class... T> struct mp_reverse_impl<L<T...>>
828 static_assert( sizeof...(T) == 0, "T... must be empty" );
834 template<template<class...> class L> struct mp_reverse_impl<L<>>
841 template<template<class...> class L, class T1> struct mp_reverse_impl<L<T1>>
846 template<template<class...> class L, class T1, class T2> struct mp_reverse_impl<L<T1, T2>>
848 using type = L<T2, T1>;
851 template<template<class...> class L, class T1, class T2, class T3> struct mp_reverse_impl<L<T1, T2, T3>>
853 using type = L<T3, T2, T1>;
856 template<template<class...> class L, class T1, class T2, class T3, class T4> struct mp_reverse_impl<L<T1, T2, T3, T4>>
858 using type = L<T4, T3, T2, T1>;
861 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5> struct mp_reverse_impl<L<T1, T2, T3, T4, T5>>
863 using type = L<T5, T4, T3, T2, T1>;
866 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6>>
868 using type = L<T6, T5, T4, T3, T2, T1>;
871 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7>>
873 using type = L<T7, T6, T5, T4, T3, T2, T1>;
876 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8>>
878 using type = L<T8, T7, T6, T5, T4, T3, T2, T1>;
881 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9>>
883 using type = L<T9, T8, T7, T6, T5, T4, T3, T2, T1>;
886 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>>
888 using type = mp_push_back<typename mp_reverse_impl<L<T...>>::type, T10, T9, T8, T7, T6, T5, T4, T3, T2, T1>;
891 } // namespace detail
893 template<class L> using mp_reverse = typename detail::mp_reverse_impl<L>::type;
896 // in detail/mp_fold.hpp
898 // mp_reverse_fold<L, V, F>
902 template<class L, class V, template<class...> class F> struct mp_reverse_fold_impl;
904 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
906 template<template<class...> class L, class... T, class V, template<class...> class F> struct mp_reverse_fold_impl<L<T...>, V, F>
908 static_assert( sizeof...(T) == 0, "T... must be empty" );
914 template<template<class...> class L, class V, template<class...> class F> struct mp_reverse_fold_impl<L<>, V, F>
921 template<template<class...> class L, class T1, class... T, class V, template<class...> class F> struct mp_reverse_fold_impl<L<T1, T...>, V, F>
923 using rest = typename mp_reverse_fold_impl<L<T...>, V, F>::type;
924 using type = F<T1, rest>;
927 template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T, class V, template<class...> class F> struct mp_reverse_fold_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>, V, F>
929 using rest = typename mp_reverse_fold_impl<L<T...>, V, F>::type;
930 using type = F<T1, F<T2, F<T3, F<T4, F<T5, F<T6, F<T7, F<T8, F<T9, F<T10, rest> > > > > > > > > >;
933 } // namespace detail
935 template<class L, class V, template<class...> class F> using mp_reverse_fold = typename detail::mp_reverse_fold_impl<L, V, F>::type;
936 template<class L, class V, class Q> using mp_reverse_fold_q = mp_reverse_fold<L, V, Q::template fn>;
942 template<class L> struct mp_unique_impl;
944 template<template<class...> class L, class... T> struct mp_unique_impl<L<T...>>
946 using type = mp_set_push_back<L<>, T...>;
949 } // namespace detail
951 template<class L> using mp_unique = typename detail::mp_unique_impl<L>::type;
954 template<class L, template<class...> class P> using mp_all_of = mp_bool< mp_count_if<L, P>::value == mp_size<L>::value >;
955 template<class L, class Q> using mp_all_of_q = mp_all_of<L, Q::template fn>;
958 template<class L, template<class...> class P> using mp_none_of = mp_bool< mp_count_if<L, P>::value == 0 >;
959 template<class L, class Q> using mp_none_of_q = mp_none_of<L, Q::template fn>;
962 template<class L, template<class...> class P> using mp_any_of = mp_bool< mp_count_if<L, P>::value != 0 >;
963 template<class L, class Q> using mp_any_of_q = mp_any_of<L, Q::template fn>;
965 // mp_replace_at_c<L, I, W>
969 template<class L, class I, class W> struct mp_replace_at_impl
971 static_assert( I::value >= 0, "mp_replace_at<L, I, W>: I must not be negative" );
973 template<class T1, class T2> using _p = std::is_same<T2, mp_size_t<I::value>>;
974 template<class T1, class T2> using _f = W;
976 using type = mp_transform_if<_p, _f, L, mp_iota<mp_size<L> > >;
979 } // namespace detail
981 template<class L, class I, class W> using mp_replace_at = typename detail::mp_replace_at_impl<L, I, W>::type;
982 template<class L, std::size_t I, class W> using mp_replace_at_c = typename detail::mp_replace_at_impl<L, mp_size_t<I>, W>::type;
988 template<class... T, class F> BOOST_MP11_CONSTEXPR F mp_for_each_impl( mp_list<T...>, F && f )
990 using A = int[sizeof...(T)];
991 return (void)A{ ((void)f(T()), 0)... }, std::forward<F>(f);
994 template<class F> BOOST_MP11_CONSTEXPR F mp_for_each_impl( mp_list<>, F && f )
996 return std::forward<F>(f);
999 } // namespace detail
1001 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, >= 1900 )
1003 // msvc has a limit of 1024
1005 template<class L, class F> BOOST_MP11_CONSTEXPR mp_if_c<mp_size<L>::value <= 1024, F> mp_for_each( F && f )
1007 return detail::mp_for_each_impl( mp_rename<L, mp_list>(), std::forward<F>(f) );
1010 template<class L, class F> BOOST_MP11_CONSTEXPR mp_if_c<mp_size<L>::value >= 1025, F> mp_for_each( F && f )
1012 using L2 = mp_rename<L, mp_list>;
1014 using L3 = mp_take_c<L2, 1024>;
1015 using L4 = mp_drop_c<L2, 1024>;
1017 return mp_for_each<L4>( mp_for_each<L3>( std::forward<F>(f) ) );
1022 template<class L, class F> BOOST_MP11_CONSTEXPR F mp_for_each( F && f )
1024 return detail::mp_for_each_impl( mp_rename<L, mp_list>(), std::forward<F>(f) );
1029 // mp_insert<L, I, T...>
1030 template<class L, class I, class... T> using mp_insert = mp_append<mp_take<L, I>, mp_push_front<mp_drop<L, I>, T...>>;
1032 // mp_insert_c<L, I, T...>
1033 template<class L, std::size_t I, class... T> using mp_insert_c = mp_append<mp_take_c<L, I>, mp_push_front<mp_drop_c<L, I>, T...>>;
1035 // mp_erase<L, I, J>
1036 template<class L, class I, class J> using mp_erase = mp_append<mp_take<L, I>, mp_drop<L, J>>;
1038 // mp_erase_c<L, I, J>
1039 template<class L, std::size_t I, std::size_t J> using mp_erase_c = mp_append<mp_take_c<L, I>, mp_drop_c<L, J>>;
1041 // mp_starts_with<L1, L2>
1042 // contributed by Glen Joseph Fernandes (glenjofe@gmail.com)
1045 template<class L1, class L2>
1046 struct mp_starts_with_impl { };
1048 template<template<class...> class L1, class... T1, template<class...> class L2,
1050 struct mp_starts_with_impl<L1<T1...>, L2<T2...> > {
1052 static mp_false check(L);
1054 template<class... T>
1055 static mp_true check(mp_list<T2..., T...>);
1057 using type = decltype(check(mp_list<T1...>()));
1060 } // namespace detail
1062 template<class L1, class L2>
1063 using mp_starts_with = typename detail::mp_starts_with_impl<L1, L2>::type;
1065 // mp_min_element<L, P>
1066 // mp_max_element<L, P>
1067 // in detail/mp_min_element.hpp
1070 } // namespace boost
1072 #endif // #ifndef BOOST_MP11_ALGORITHM_HPP_INCLUDED