模仿glog风格的log实现

需求

实现一个类似glog风格支持<<链式调用的log库。

代码

利用的析构函数的特性，每次LOG结束后会自动调用，完成消息拼接。

#include <string>
#include <iostream>class LOG
{
public:LOG(int lv){level = lv;body = "";}template<typename type>LOG& operator<<(type msg){body += std::to_string(msg);return *this;}LOG& operator<<(const char* msg){body += msg;return *this;}~LOG(){std::cout << "[" << level << "] " \<< body << std::endl;}
private:int level = 0;std::string body;
};int main()
{// for simplicity, 1 2 3 for INFO WARN ERRORLOG(1) << "test" << 111;LOG(2) <<"string: " << float(41*8 + 59%8)/640*1900;return 0;
}

效果

[1] test111
[2] string: 982.656189