28 lines
703 B
C++
28 lines
703 B
C++
// Copyright (c) 2017 Antony Polukhin
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See
|
|
// accompanying file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
#include "boost/config.hpp"
|
|
#include "boost/variant.hpp"
|
|
#include <string>
|
|
|
|
struct some_user_provided_visitor_for_lvalues: boost::static_visitor<void> {
|
|
void operator()(std::string& ) const {}
|
|
void operator()(int ) const {}
|
|
};
|
|
|
|
int main() {
|
|
boost::apply_visitor(
|
|
some_user_provided_visitor_for_lvalues(),
|
|
boost::variant<int, std::string>("Hello")
|
|
);
|
|
|
|
#ifdef BOOST_MSVC
|
|
# error Temporaries/rvalues could bind to non-const lvalues on MSVC compilers
|
|
#endif
|
|
|
|
return 0;
|
|
}
|