swh:1:snp:ff2a11cd2e44dd19ec3814028ef2ce6605664e63
Tip revision: dc42c7ccc20a4425948ecf070dfa35af27d72a10 authored by Eric Fischer on 30 October 2017, 22:16:07 UTC
Merge pull request #481 from mapbox/crashers
Merge pull request #481 from mapbox/crashers
Tip revision: dc42c7c
variant_io.hpp
#ifndef MAPBOX_UTIL_VARIANT_IO_HPP
#define MAPBOX_UTIL_VARIANT_IO_HPP
#include <iosfwd>
#include <mapbox/variant.hpp>
namespace mapbox {
namespace util {
namespace detail {
// operator<< helper
template <typename Out>
class printer
{
public:
explicit printer(Out& out)
: out_(out) {}
printer& operator=(printer const&) = delete;
// visitor
template <typename T>
void operator()(T const& operand) const
{
out_ << operand;
}
private:
Out& out_;
};
}
// operator<<
template <typename CharT, typename Traits, typename... Types>
VARIANT_INLINE std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& out, variant<Types...> const& rhs)
{
detail::printer<std::basic_ostream<CharT, Traits>> visitor(out);
apply_visitor(visitor, rhs);
return out;
}
} // namespace util
} // namespace mapbox
#endif // MAPBOX_UTIL_VARIANT_IO_HPP