boost :: logでユーザ定義構造を出力する

Question

私はの内容を出力するようにしています。boost :: asio :: streambufオブジェクトはboost :: logです。私は、次のようにオペレータ< <過負荷を定義した：

In file included from /home/bobeff/work/asio_netcomm_poc/third_party/lib/boost/boost/log/sources/record_ostream.hpp:31:0, from /home/bobeff/work/asio_netcomm_poc/third_party/lib/boost/boost/log/trivial.hpp:23, from /home/bobeff/work/asio_netcomm_poc/server/src/server.cpp:14: /home/bobeff/work/asio_netcomm_poc/third_party/lib/boost/boost/log/utility/formatting_ostream.hpp: In instantiation of 'typename boost::log::v2_mt_posix::aux::enable_if_formatting_ostream::type boost::log::v2_mt_posix::operator<<(StreamT&, T&) [with StreamT = boost::log::v2_mt_posix::basic_formatting_ostream; T = boost::asio::basic_streambuf<>; typename boost::log::v2_mt_posix::aux::enable_if_formatting_ostream::type = boost::log::v2_mt_posix::basic_formatting_ostream&]': /home/bobeff/work/asio_netcomm_poc/third_party/lib/boost/boost/log/sources/record_ostream.hpp:212:51: required from 'typename boost::log::v2_mt_posix::aux::enable_if_record_ostream::type boost::log::v2_mt_posix::operator<<(StreamT&, T&) [with StreamT = boost::log::v2_mt_posix::basic_record_ostream; T = boost::asio::basic_streambuf<>; typename boost::log::v2_mt_posix::aux::enable_if_record_ostream::type = boost::log::v2_mt_posix::basic_record_ostream&]' /home/bobeff/work/asio_netcomm_poc/server/src/server.cpp:88:47:
required from here /home/bobeff/work/asio_netcomm_poc/third_party/lib/boost/boost/log/utility/formatting_ostream.hpp:840:19: error: cannot bind 'boost::log::v2_mt_posix::basic_formatting_ostream::ostream_type {aka std::basic_ostream}' lvalue to 'std::basic_ostream&&' strm.stream() << value; ^In file included from /usr/include/c++/4.8/iostream:39:0, from /home/bobeff/work/asio_netcomm_poc/server/src/server.cpp:1: /usr/include/c++/4.8/ostream:602:5: error: initializing argument 1 of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits; _Tp = boost::asio::basic_streambuf<>]' operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x) ^

：私は次のエラーを持っている

BOOST_LOG_TRIVIAL(trace) << buffer; 

：

ostream& operator<<(ostream& ostr, const boost::asio::streambuf& buffer) 
{ 
    for (size_t i = 0; i < buffer.size(); ++i) 
    { 
     ostr << hex << (int) buffer_cast<const char*>(buffer.data())[i] << " "; 
    } 
    return ostr; 
} 

しかし、出力にバッファの内容を試した後

バッファの内容を出力する正しい方法は何ですか？

Answer 1

operator<<はADLでは見つかりません。答えはthisの最初の部分を参照してください。