1
2 // Copyright 2017 Peter Dimov.
3 //
4 // Distributed under the Boost Software License, Version 1.0.
5 //
6 // See accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt
8
9 #include <boost/mp11/detail/config.hpp>
10
11 #if BOOST_MP11_MSVC
12 # pragma warning( disable: 4503 ) // decorated name length exceeded
13 # pragma warning( disable: 4307 ) // '*': integral constant overflow
14 # pragma warning( disable: 4244 ) // conversion from size_t to uint32_t
15 # pragma warning( disable: 4267 ) // conversion from size_t to uint32_t
16 #endif
17
18 #include <boost/mp11/algorithm.hpp>
19 #include <boost/mp11/list.hpp>
20 #include <boost/core/lightweight_test.hpp>
21 #include <tuple>
22 #include <cstdint>
23
24 #if defined( BOOST_MP11_HAS_CXX14_CONSTEXPR )
25 # define CONSTEXPR14 constexpr
26 #else
27 # define CONSTEXPR14
28 #endif
29
30 struct F
31 {
32 int s;
33
operator ()F34 CONSTEXPR14 void operator()( int ) { s = s * 10 + 1; }
operator ()F35 CONSTEXPR14 void operator()( short ) { s = s * 10 + 2; }
operator ()F36 CONSTEXPR14 void operator()( char ) { s = s * 10 + 3; }
37 };
38
39 struct G
40 {
41 std::uint32_t s;
operator ()G42 CONSTEXPR14 void operator()( std::uint32_t i ) { s = s * 3 + i; }
43 };
44
45 using boost::mp11::mp_list;
46 using boost::mp11::mp_for_each;
47 using boost::mp11::mp_iota_c;
48
main()49 int main()
50 {
51 BOOST_TEST_EQ( (mp_for_each<mp_list<>>( 11 )), 11 );
52 BOOST_TEST_EQ( (mp_for_each<mp_list<int>>( F{0} ).s), 1 );
53 BOOST_TEST_EQ( (mp_for_each<mp_list<int, short>>( F{0} ).s), 12 );
54 BOOST_TEST_EQ( (mp_for_each<mp_list<int, short, char>>( F{0} ).s), 123 );
55
56 BOOST_TEST_EQ( (mp_for_each<std::tuple<>>( 11 )), 11 );
57 BOOST_TEST_EQ( (mp_for_each<std::tuple<int>>( F{0} ).s), 1 );
58 BOOST_TEST_EQ( (mp_for_each<std::tuple<int, short>>( F{0} ).s), 12 );
59 BOOST_TEST_EQ( (mp_for_each<std::tuple<int, short, char>>( F{0} ).s), 123 );
60
61 BOOST_TEST_EQ( (mp_for_each<std::pair<int, short>>( F{0} ).s), 12 );
62
63 #if BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, <= 1800 )
64 #else
65
66 using L = mp_iota_c<1089>;
67 std::uint32_t const R = 598075296;
68
69 BOOST_TEST_EQ( (mp_for_each<L>( G{0} ).s), R );
70
71 {
72 G g{0};
73 mp_for_each<L>( g );
74 BOOST_TEST_EQ( g.s, R );
75 }
76
77 #endif
78
79 #if defined( BOOST_MP11_NO_CONSTEXPR ) || ( !defined(_MSC_VER) && !defined( __GLIBCXX__ ) && __cplusplus < 201400L )
80 #else
81
82 static_assert( mp_for_each<mp_list<>>( 11 ) == 11, "mp_for_each<mp_list<>>( 11 ) == 11" );
83 static_assert( mp_for_each<std::tuple<>>( 12 ) == 12, "mp_for_each<std::tuple<>>( 12 ) == 12" );
84
85 #endif
86
87 #if defined( BOOST_MP11_HAS_CXX14_CONSTEXPR )
88
89 constexpr auto r1 = mp_for_each<mp_list<int, short, char>>( F{0} );
90 static_assert( r1.s == 123, "r1.s == 123" );
91
92 constexpr auto r2 = mp_for_each<std::tuple<int, short, char>>( F{0} );
93 static_assert( r2.s == 123, "r2.s == 123" );
94
95 constexpr auto r3 = mp_for_each<std::pair<int, short>>( F{0} );
96 static_assert( r3.s == 12, "r3.s == 12" );
97
98 constexpr auto r4 = mp_for_each<L>( G{0} );
99 static_assert( r4.s == R, "r4.s == R" );
100
101 #endif
102
103 return boost::report_errors();
104 }
105