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boost::convert — Boost.Convert deployment interface with the default converter.
// In header: <boost/convert.hpp> template<typename TypeOut, typename TypeIn> boost::optional< TypeOut > convert(TypeIn const & value_in);
For example,
struct boost::cnv::by_default : boost::cnv::cstream {}; // boost::cnv::cstream (through boost::cnv::by_default) is deployed // as the default converter when no converter is provided explicitly. boost::optional<int> i = boost::convert<int>("12"); boost::optional<string> s = boost::convert<string>(123.456);