Basic C++ logger

cpplog.hpp

/* cpplog.hpp
 *
 * Author: Luigi Pertoldi
 * Created: Tue 02 Jul 2019
 *
 * Usage:
 *
 * logging::min_level = logging::info;
 * logging::out(info)  << "the program is doing well" << std::endl;
 * logging::out(error) << "an error occurred!" << std::endl;
 *
 */
#include <iostream>
#include <fstream>

namespace logging {
    enum level {debug, info, warning, error};
    level min_level = info;
    std::ofstream devnull("/dev/null");

    std::ostream& out(const level& lvl) {
        if (lvl == debug and min_level <= debug) {
            std::cout << "\033[36m[ Debug:\033[0m ";
            return std::cout;
        }
        if (lvl == info and min_level <= info) {
            std::cout << "\033[97;1m[ Info:\033[0m ";
            return std::cout;
        }
        if (lvl == warning and min_level <= warning) {
            std::cerr << "\033[33m[ Warning:\033[0m ";
            return std::cerr;
        }
        if (lvl == error and min_level <= error) {
            std::cerr << "\033[91m[ Error:\033[0m ";
            return std::cerr;
        }
        else return devnull;
    }
}