ceph/src/boost/libs/variant/test/variant_rvalue_get_with_ampersand_test.cpp

   1 //-----------------------------------------------------------------------------
   2 // boost-libs variant/test/variant_get_test.cpp source file
   3 // See http://www.boost.org for updates, documentation, and revision history.
   4 //-----------------------------------------------------------------------------
   5 //
   6 // Copyright (c) 2017-2017 Albert Sverdlov
   7 //
   8 // Distributed under the Boost Software License, Version 1.0. (See
   9 // accompanying file LICENSE_1_0.txt or copy at
  10 // http://www.boost.org/LICENSE_1_0.txt)
  11
  12 #include "boost/variant/get.hpp"
  13 #include "boost/variant/variant.hpp"
  14 #include "boost/core/lightweight_test.hpp"
  15
  16 #include <boost/move/move.hpp>
  17 #include <boost/static_assert.hpp>
  18
  19 #include <string>
  20
  21 #define UNUSED(v) (void)(v)
  22
  23 inline void run()
  24 {
  25 #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
  26     typedef boost::variant<int, std::string> var_t;
  27
  28     std::string s = "abacaba";
  29     var_t v = s;
  30
  31     // must spit an error at compile-time because of 'std::string&'
  32     std::string new_s = boost::strict_get<std::string&>(boost::move(v));
  33     UNUSED(new_s);
  34 #else
  35     BOOST_STATIC_ASSERT_MSG(false, "Dummy compile-time error to pass the test on C++03");
  36 #endif
  37 }
  38
  39 int main()
  40 {
  41     run();
  42     return boost::report_errors();
  43 }