Re: [cpp] boost serialize 和 ostream 问题

[xxmplus]

因为序列化和输入输出不是一回事啊

在 06-5-15，Richard Zeng<zengyongjoy at gmail.com> 写道：
>
> 下面是Boost serialization 中的demo例子
> 为何写了serialize 函数还写个ostream<<
> 阿，
> 我对ostream 不是很了解，
> 我的印象是iostream 是在控制台里输入输出的
> /////////////////////////////////////////////////////////////////////////////
> class gps_position
> {
>     friend std::ostream & operator<<(std::ostream &os, const gps_position
> &gp);
>     friend class boost::serialization::access;
>     int degrees;
>     int minutes;
>      float seconds;
>     template<class Archive>
>     void serialize(Archive & ar, const unsigned int /* file_version */){
>         ar & degrees & minutes & seconds;
>     }
> public:
>     // every serializable class needs a constructor
>     gps_position(){};
>     gps_position(int _d, int _m, float _s) :
>         degrees(_d), minutes(_m), seconds(_s)
>     {}
> };
> std::ostream & operator<<(std::ostream &os, const gps_position &gp)
> {
>     return os << ' ' << gp.degrees << (unsigned char)186 << gp.minutes <<
> '\'' << gp.seconds << '"';
> }
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