1 // Copyright 2017 Peter Dimov.
2 // Distributed under the Boost Software License, Version 1.0.
3
4 #include <boost/tuple/tuple.hpp>
5 #include <boost/core/lightweight_test.hpp>
6 #include <boost/config.hpp>
7 #include <boost/config/pragma_message.hpp>
8
9 #if defined(BOOST_NO_CXX11_HDR_TUPLE)
10
11 BOOST_PRAGMA_MESSAGE("Skipping std::tuple_size tests for lack of <tuple>")
main()12 int main() {}
13
14 #else
15
16 #include <tuple>
17
test(std::size_t x)18 template<class Tp> void test( std::size_t x )
19 {
20 BOOST_TEST_EQ( std::tuple_size< Tp >::value, x );
21 BOOST_TEST_EQ( std::tuple_size< typename Tp::inherited >::value, x );
22 }
23
24 struct V
25 {
26 };
27
main()28 int main()
29 {
30 test< boost::tuple<> >( 0 );
31 test< boost::tuple<V> >( 1 );
32 test< boost::tuple<V, V> >( 2 );
33 test< boost::tuple<V, V, V> >( 3 );
34 test< boost::tuple<V, V, V, V> >( 4 );
35 test< boost::tuple<V, V, V, V, V> >( 5 );
36 test< boost::tuple<V, V, V, V, V, V> >( 6 );
37 test< boost::tuple<V, V, V, V, V, V, V> >( 7 );
38 test< boost::tuple<V, V, V, V, V, V, V, V> >( 8 );
39 test< boost::tuple<V, V, V, V, V, V, V, V, V> >( 9 );
40 test< boost::tuple<V, V, V, V, V, V, V, V, V, V> >( 10 );
41
42 #if !defined(BOOST_NO_CXX11_DECLTYPE)
43
44 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple())>::value, 0 );
45 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1))>::value, 1 );
46 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2))>::value, 2 );
47 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3))>::value, 3 );
48 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4))>::value, 4 );
49 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5))>::value, 5 );
50 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5, 6))>::value, 6 );
51 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5, 6, 7))>::value, 7 );
52 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5, 6, 7, 8))>::value, 8 );
53 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5, 6, 7, 8, 9))>::value, 9 );
54 BOOST_TEST_EQ( std::tuple_size<decltype(boost::make_tuple(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))>::value, 10 );
55
56 #endif
57
58 return boost::report_errors();
59 }
60
61 #endif
62