// Logfile
    log::add("file", std::fstream("log.txt"))
        .serivity(log::level::LOG_INFO);

    // Debug log
    log::add("debug", std::fstream("debug.txt"))
        .serivity(log::level::LOG_DEBUG);

    // Output
    log::add("stdout", std::cout)
        .serivity(log::level::LOG_WARN);

    // ...

    // Log to all targets
    log::info() << "this is a test" << std::endl;
    log::warn() << "Forking process, child pid = " << pid << " (parent = " << ppid << ")" << std::endl;

    // Close stdout
    log::close("stdout");

    // ...

    // Log to remaining targets
    log::info() << "this is a test" << std::endl;