c++命名对象和匿名对象的解析

#ifndef __CLOGER_H__
#define __CLOGER_H__
 
#include <string>
#include <stdlib.h>
#include <stdio.h>
 
class CLoger
{
public:
    explicit CLoger(std::string &str): mStr(str)
    {
 
    }
 
    ~CLoger()
    {
        printf("destructor mStr = %s\n", mStr.c_str());
    }
 
    std::string &string()
    {
        return mStr;
    }
private:
    std::string mStr;
};
 
#endif
 
#include "anonymous_object.h"
int main()
{
    std::string name("name");
    CLoger loger(name); //具名对象，main函数退出后才会销毁
 
    std::string anonymous("anonymous");
    CLoger(anonymous).string(); //匿名对象，使用完即销毁，即此语句结束后立即调用其析构函数
    printf("main finish!\n");
    return 0;
}

CLogger::~CLogger()
{
    mImpl.finish();  //打印结尾添加文件名和行号
    const CLogStream::Buffer& buf(stream().buffer());
    g_output(buf.data(), buf.length()); //函数指针调用，默认是输出到标准输出stdout，这里是日志最终输出的语句
 
    if (mImpl.mLevel == FATAL)
    {
        g_flush();
        abort();
    }
}

int main(int argc, char* argv[])
{  
    char name[256];
    strncpy(name, argv[0], 256);
    CAsyncLogging log(::basename(name), kRollSize);
    log.start();
    g_asyncLog = &log;
 
    bool longLog = argc > 1;
    // bench(longLog);
    LOG_INFO << "loggingTest!";
 
    return 0;
}