1 /*============================================================================= 2 Copyright (c) 2016 Kohei Takahashi 3 4 Distributed under the Boost Software License, Version 1.0. (See accompanying 5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 ==============================================================================*/ 7 8 #include <boost/detail/lightweight_test.hpp> 9 #include <boost/fusion/container.hpp> 10 #include <boost/fusion/sequence.hpp> 11 #include <boost/fusion/sequence/io/out.hpp> 12 #include <boost/fusion/iterator/equal_to.hpp> 13 #include <boost/fusion/adapted/struct/define_struct.hpp> 14 #include <boost/mpl/assert.hpp> 15 #include <boost/mpl/is_sequence.hpp> 16 #include <boost/static_assert.hpp> 17 #include <iostream> 18 BOOST_PP_EMPTY()19BOOST_FUSION_DEFINE_STRUCT(BOOST_PP_EMPTY(), empty_struct, ) 20 21 int 22 main() 23 { 24 using namespace boost; 25 using namespace boost::fusion; 26 27 std::cout << tuple_open('['); 28 std::cout << tuple_close(']'); 29 std::cout << tuple_delimiter(", "); 30 31 { 32 BOOST_MPL_ASSERT_NOT((traits::is_view<empty_struct>)); 33 BOOST_STATIC_ASSERT(!traits::is_view<empty_struct>::value); 34 empty_struct e; 35 36 std::cout << e << std::endl; 37 BOOST_TEST(e == make_vector()); 38 39 BOOST_STATIC_ASSERT(fusion::result_of::size<empty_struct>::value == 0); 40 BOOST_STATIC_ASSERT(fusion::result_of::empty<empty_struct>::value); 41 } 42 43 { 44 vector<> v; 45 empty_struct e; 46 BOOST_TEST(v == e); 47 BOOST_TEST_NOT(v != e); 48 BOOST_TEST_NOT(v < e); 49 BOOST_TEST(v <= e); 50 BOOST_TEST_NOT(v > e); 51 BOOST_TEST(v >= e); 52 } 53 54 { 55 empty_struct e; 56 57 // conversion from empty_struct to vector 58 vector<> v(e); 59 v = e; 60 61 // conversion from empty_struct to list 62 //list<> l(e); 63 //l = e; 64 } 65 66 { // begin/end 67 typedef fusion::result_of::begin<empty_struct>::type b; 68 typedef fusion::result_of::end<empty_struct>::type e; 69 70 BOOST_MPL_ASSERT((fusion::result_of::equal_to<b, e>)); 71 } 72 73 BOOST_MPL_ASSERT((mpl::is_sequence<empty_struct>)); 74 75 return boost::report_errors(); 76 } 77