小编ejk*_*koy的帖子

我有一个代码:

class Client2ServerProtocol {

};

class ProtocolHelper {
public:
    template<class ProtocolClass>
    int GetProtocolId() {
        return -1;
    }
};

template<> inline int
ProtocolHelper::GetProtocolId<Client2ServerProtocol>() {
    return 1;
}

template<typename PROTOCOL_HELPER>
class Dispatcher {
public:
    template<typename PROTOCOL_CLASS>
    void Subscribe(int msgId) {
        int protoId = helper.GetProtocolId<PROTOCOL_CLASS>();
        printf("Subscribe protoId %d, msgId %d", protoId, msgId);
    }
    PROTOCOL_HELPER helper;
};

int main() {
    Dispatcher<ProtocolHelper> dispatcher;
    dispatcher.Subscribe<Client2ServerProtocol>(1);
    return 0;
}

它在MSVC下成功编译(和工作),但是gcc抱怨语法无效:

test.cc:23:56:错误:在'>'之前预期的primary-expression标志int protoId = helper.GetProtocolId();

test.cc:23:58:错误:')'令牌之前的预期primary-expression

我做错了什么？int protoId = helper.GetProtocolId();