ceph/src/boost/libs/optional/test/optional_test_assign.cpp

   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 //  akrzemi1@gmail.com
  11
  12 #include "boost/core/lightweight_test.hpp"
  13 #include "boost/optional/optional.hpp"
  14
  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
  26 int main()
  27 {
  28   test_assignment_to_empty();
  29   return boost::report_errors();
  30 }