ceph/src/boost/libs/variant2/test/variant_ostream_insert.cpp

   1 // Copyright 2021 Peter Dimov
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // https://www.boost.org/LICENSE_1_0.txt
   4
   5 #include <boost/variant2/variant.hpp>
   6 #include <boost/core/lightweight_test.hpp>
   7 #include <sstream>
   8 #include <string>
   9
  10 using namespace boost::variant2;
  11
  12 template<class T> std::string to_string( T const& t )
  13 {
  14     std::ostringstream os;
  15
  16     os << t;
  17
  18     return os.str();
  19 }
  20
  21 int main()
  22 {
  23     {
  24         BOOST_TEST_EQ( to_string( monostate() ), "monostate" );
  25     }
  26
  27     {
  28         variant<monostate, int, float, std::string> v;
  29
  30         BOOST_TEST_EQ( to_string( v ), to_string( monostate() ) );
  31
  32         v = 1;
  33         BOOST_TEST_EQ( to_string( v ), to_string( 1 ) );
  34
  35         v = 3.14f;
  36         BOOST_TEST_EQ( to_string( v ), to_string( 3.14f ) );
  37
  38         v = "test";
  39         BOOST_TEST_EQ( to_string( v ), to_string( "test" ) );
  40     }
  41
  42     return boost::report_errors();
  43 }