c++ 日志模块 标准库封装

log.h

    #ifndef LOG_H
    #define LOG_H
    #include <vector>
    #include <iostream>
    #include <string>
    
    struct LogFormat {
        std::vector<std::string> perfixs;
        LogFormat(const std::vector<std::string> &perfixs = {}) : perfixs(perfixs) {}
        std::string perfixsString(){
            std::string perfixsString;
            for (auto &&one : perfixs) {
                perfixsString += "[" + one + "]";
            }
            return perfixsString;
        }
    };

    struct Stderr : LogFormat {
        Stderr(const std::vector<std::string> &perfixs = {}) : LogFormat(perfixs)
        { std::cerr << perfixsString(); }
        ~Stderr() {std::cerr << std::endl;}
        template<class T> Stderr& operator << (const T &t) {
             std::cerr << t << " ";
            return *this;
        }
    };

    struct Stdout : LogFormat {
        Stdout(const std::vector<std::string> &perfixs = {}) : LogFormat(perfixs)
        { std::cout << perfixsString(); }
        ~Stdout() {std::cout << std::endl;}
        template<class T> Stdout& operator << (const T &t) {
            std::cout << t << " ";
            return *this;
        }
    };
    
#define LogErr Stderr({__FILE__, std::to_string(__LINE__), "Error"})
#define LogOut Stdout({__FILE__, std::to_string(__LINE__), "Output"})

#endif // LOG_H

std输出格式的默认兼容, 列表中可添加其他前缀，如下：

 #define LogOut Stdout({__DATA__, __FILE__, std::to_string(__LINE__), "Output"})

使用方法:

   LogErr << 10 << "string";
   LogOut << 10 << "string";

输出格式：

[__DATA__][__FILE__][__LINE__][Output] 10 string