die Lösung von Chris Arbeiten gezeigt, aber wenn Sie das Format anpassen oder festlegen, welche Informationen in jedem Waschbecken angezeigt wird, Sie änderbare konstante Attribute verwenden müssen:
logging::core::get()->add_global_attribute("File", attrs::mutable_constant<std::string>(""));
logging::core::get()->add_global_attribute("Line", attrs::mutable_constant<int>(0));
Dann machen Sie eine benutzerdefinierte Makros, die diese neuen Attribute enthält:
// New macro that includes severity, filename and line number
#define CUSTOM_LOG(logger, sev) \
BOOST_LOG_STREAM_WITH_PARAMS(\
(logger), \
(set_get_attrib("File", path_to_filename(__FILE__))) \
(set_get_attrib("Line", __LINE__)) \
(::boost::log::keywords::severity = (boost::log::trivial::sev)) \
)
// Set attribute and return the new value
template<typename ValueType>
ValueType set_get_attrib(const char* name, ValueType value) {
auto attr = logging::attribute_cast<attrs::mutable_constant<ValueType>>(logging::core::get()->get_global_attributes()[name]);
attr.set(value);
return attr.get();
}
// Convert file path to only the filename
std::string path_to_filename(std::string path) {
return path.substr(path.find_last_of("/\\")+1);
}
Die nächste vollständige Quellcode zwei Waschbecken erstellen. Der erste verwendet Datei- und Linienattribute, der zweite nicht.
#include <boost/log/trivial.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/utility/setup/file.hpp>
#include <boost/log/utility/setup/console.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/attributes/mutable_constant.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/log/attributes/mutable_constant.hpp>
namespace logging = boost::log;
namespace attrs = boost::log::attributes;
namespace expr = boost::log::expressions;
namespace src = boost::log::sources;
namespace keywords = boost::log::keywords;
// New macro that includes severity, filename and line number
#define CUSTOM_LOG(logger, sev) \
BOOST_LOG_STREAM_WITH_PARAMS(\
(logger), \
(set_get_attrib("File", path_to_filename(__FILE__))) \
(set_get_attrib("Line", __LINE__)) \
(::boost::log::keywords::severity = (boost::log::trivial::sev)) \
)
// Set attribute and return the new value
template<typename ValueType>
ValueType set_get_attrib(const char* name, ValueType value) {
auto attr = logging::attribute_cast<attrs::mutable_constant<ValueType>>(logging::core::get()->get_global_attributes()[name]);
attr.set(value);
return attr.get();
}
// Convert file path to only the filename
std::string path_to_filename(std::string path) {
return path.substr(path.find_last_of("/\\")+1);
}
void init() {
// New attributes that hold filename and line number
logging::core::get()->add_global_attribute("File", attrs::mutable_constant<std::string>(""));
logging::core::get()->add_global_attribute("Line", attrs::mutable_constant<int>(0));
// A file log with time, severity, filename, line and message
logging::add_file_log (
keywords::file_name = "sample.log",
keywords::format = (
expr::stream
<< expr::format_date_time<boost::posix_time::ptime>("TimeStamp", "%Y-%m-%d_%H:%M:%S.%f")
<< ": <" << boost::log::trivial::severity << "> "
<< '[' << expr::attr<std::string>("File")
<< ':' << expr::attr<int>("Line") << "] "
<< expr::smessage
)
);
// A console log with only time and message
logging::add_console_log (
std::clog,
keywords::format = (
expr::stream
<< expr::format_date_time<boost::posix_time::ptime>("TimeStamp", "%Y-%m-%d %H:%M:%S")
<< " | " << expr::smessage
)
);
logging::add_common_attributes();
}
int main(int argc, char* argv[]) {
init();
src::severity_logger<logging::trivial::severity_level> lg;
CUSTOM_LOG(lg, debug) << "A regular message";
return 0;
}
Die Aussage CUSTOM_LOG(lg, debug) << "A regular message";
zwei Ausgänge erzeugt, mit diesem Format eine Protokolldatei zu schreiben ...
2015-10-15_15:25:12.743153: <debug> [main.cpp:61] A regular message
... und gibt an die Konsole dies:
2015-10-15 16:58:35 | A regular message
Das sollte so offensichtlich sein, aber es ist nicht so. Ich habe mir schon eine ganze Weile den Kopf darüber geschlagen. Hast du Glück gehabt, seit du deine Frage gestellt hast? Wenn du es herausgefunden hast, beantworte deine eigene Frage und hilf einem Kerl! – ixe013