loguru.cpp

#include <thread>
#include "loguru.hpp"
#include "loguru.cpp"

void sleep(int ms)
{
    //We can also inject parameters into the logging strings
    VLOG_F(0, "Sleeping for %d ms", ms);
    std::this_thread::sleep_for(std::chrono::milliseconds(ms));
}

void complex()
{
    //LOG_SCOPE_F is indenting the following logs
    LOG_SCOPE_F(INFO, "Preparing complex calculation");

    //VLOG_F can take a dynamic defined verbosity level
    VLOG_F(0, "Heating up CPU");
    sleep(500);
    std::thread([](){
        loguru::set_thread_name("complex lambda");
       
        const bool value = true;
        LOG_IF_F(INFO, value, "This log is printed inside another thread");
    }).join();
}

void crashingFunction(int index)
{
    //ERROR_CONTEXT is logging certain arguments in case of a crash
    ERROR_CONTEXT("Computing with index", index);

    //Asserts are also possible
    std::vector<std::string> list;
    CHECK_F(index > 1, "Oh no, wrong index, index is %d!!", index);
}

int main(int argc, char* argv[])
{
    //Time stamping begin of logging and we can forward cli parameters such as -v (verbosity level) to loguru
    loguru::init(argc, argv);

    //Additional, if we need we can also put the logs into a defined file
    loguru::add_file("important.log", loguru::Truncate, loguru::Verbosity_INFO);

    LOG_F(INFO, "We are starting our complex threaded computation!");
    complex();
    LOG_F(INFO, "Complex computation done!");

    crashingFunction(-1);

    return 0;
}