随笔

#include <string>
class CompanyA{
public:
    void sendCleartext(const std::string& msg){};
    void sendEncrypted(const std::string& msg){};
};

class CompanyB{
    void sendCleartext(const std::string& msg){};
    void sendEncrypted(const std::string& msg){};
};

class CompanyZ{
public:
    void sendEncrypted(const std::string& msg){};
};

class MsgInfo{};

template<typename Company>
class MsgSender{
public:
    void sendClear(const MsgInfo& info)
    {
        std::string msg;
        Company c;
        c.sendCleartext(msg);
    }
    void sendSecret(const MsgInfo& info)
    {
        std::string msg;
        Company c;
        c.sendEncrypted(info);
    }
};

//针对CompanyZ全特化
template<>
class MsgSender<CompanyZ>
{
public:
    void sendClear(const MsgInfo& info)
    {

    }
};

template<typename Company>
class LoggingMsgSender : public MsgSender<Company>
{
public:
    void sendClearMsg(const MsgInfo& info)
    {
        sendClear(info);
    }
};

int main()
{
    LoggingMsgSender<CompanyZ> a;
    MsgInfo info;
    a.sendClearMsg(info);
    return 0;
}