yalog

Yet Another Log library in C++, based on Boost.log.

Compilation

$ git clone https://github.com/cbuchart/yalog.git
$ cd yalog && mkdir build && cd build
$ cmake .. && make -j

Basic usage

Initialization

• Setup log to file under logs directory, with logs no larger than 1MB and no more than 100 logs: yalog::log_to_file("logs", "log", 1024 * 1024, 100);
• Setup log to console (standard output): yalog::log_to_stream(std::cout);
• Set minimum severity level to Debug (Warning by default): yalog::set_minimum_severity(yalog::Severity::Debug);

Available macros

Log macros for severity level:

• YALOG_TRACE()
• YALOG_DEBUG()
• YALOG_INFO()
• YALOG_WARNING()
• YALOG_ERROR()
• YALOG_FATAL()

Example: YALOG_DEBUG() << "This is a sample message";

Other useful macros

• YALOG_INOUT(): adds a log record (trace) indicating function name and when reaching the end of the current scope (useful for tracing functions).
• YALOG_LINE(): adds a log record (trace) indicating current filename and line number.
• YALOG_EXPRESSION(expr): adds a log record (debug) for the given expression and its value.

Please check the given example for more information.

Example

#include <iostream>
#include <string>

#include "yalog.h"

void foo()
{
    YALOG_INOUT();

    YALOG_LINE();
    YALOG_EXPRESSION(40 + 2);
}

int main()
{
    yalog::log_to_file("logs", "log", 128 * 1024, 32u);
    yalog::log_to_stream(std::cout);

    YALOG_INFO() << "This should not appear";
    yalog::set_min_severity(yalog::Severity::Trace);

    YALOG_TRACE() << "Test for trace, string " << "Hello world!";
    YALOG_DEBUG() << "Test for debug, double " << 3.141592;
    YALOG_INFO() << "Test for info, uint32_t " << 42u;
    YALOG_WARNING() << "Test for warning";
    YALOG_ERROR() << "Test for error";
    YALOG_FATAL() << "Test for fatal";

    foo();

    return 0;
}