1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
// Copyright 2015-2025 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/algorithm.hpp>
#include <boost/mp11/list.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
#include <utility>
struct X1 {};
struct X2 {};
struct X3 {};
struct X4 {};
template<class T1, class T2> struct F {};
using boost::mp11::mp_size_t;
struct W
{
template<std::size_t N> void operator()( mp_size_t<N> ) const
{
using boost::mp11::mp_iota_c;
using boost::mp11::mp_fold;
using boost::mp11::mp_list;
using boost::mp11::mp_push_back;
using boost::mp11::mp_push_front;
using boost::mp11::mp_reverse;
using boost::mp11::mp_plus;
using L = mp_iota_c<N>;
using R1 = mp_fold<L, mp_list<>, mp_push_back>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R1, L>));
using R2 = mp_fold<L, mp_list<>, mp_push_front>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R2, mp_reverse<L>>));
using R3 = mp_fold<L, mp_size_t<0>, mp_plus>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R3, mp_size_t<N*(N-1)/2>>));
}
};
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_fold;
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<mp_list<>, void, F>, void>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<mp_list<X1>, void, F>, F<void, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<mp_list<X1, X2>, void, F>, F<F<void, X1>, X2>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<mp_list<X1, X2, X3>, void, F>, F<F<F<void, X1>, X2>, X3>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<mp_list<X1, X2, X3, X4>, void, F>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
}
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<>, void, F>, void>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1>, void, F>, F<void, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2>, void, F>, F<F<void, X1>, X2>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2, X3>, void, F>, F<F<F<void, X1>, X2>, X3>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2, X3, X4>, void, F>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
}
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::pair<X1, X2>, void, F>, F<F<void, X1>, X2>>));
}
using boost::mp11::mp_push_back;
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_push_back>, mp_list<X1, X2, X3, X4>>));
}
using boost::mp11::mp_push_front;
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_push_front>, mp_list<X4, X3, X2, X1>>));
}
using boost::mp11::mp_for_each;
using boost::mp11::mp_iota_c;
#if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
W()( mp_size_t<37>() );
#else
mp_for_each< mp_iota_c<38> >( W{} );
#endif
return boost::report_errors();
}
|
