1 // Copyright (C) 2018 Andrzej Krzemienski.
2 //
3 // Use, modification, and distribution is subject to the Boost Software
4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // See http://www.boost.org/lib/optional for documentation.
8 //
9 // You are welcome to contact the author at:
10 //  [email protected]
11 
12 #include "boost/core/lightweight_test.hpp"
13 #include "boost/optional/optional.hpp"
14 
test_assignment_to_empty()15 void test_assignment_to_empty()
16 {
17   // this test used to fail on GCC 8.1.0/8.2.0/9.0.0 with -std=c++98
18   boost::optional<int> oa, ob(1);
19   BOOST_TEST(!oa);
20   BOOST_TEST(ob);
21 
22   oa = ob;
23   BOOST_TEST(oa);
24 }
25 
main()26 int main()
27 {
28   test_assignment_to_empty();
29   return boost::report_errors();
30 }
31