Question

我正在编写玩具日历。它包含此模板会议类型：

#include <string>
#include <iostream>
#pragma once
using namespace std;

template <class T>
class Meeting_t
{
    private:
        T startTime;
        T endTime;
        string subject;
    public:
        Meeting_t(){
            //do not delete, a default CTOR will be always created
            //this way we at least know something is wrong
            return NULL;
        }
        ~Meeting_t(){
            //members are all managed outside of the object
        }
        Meeting_t(T sTime, T eTime, string subj){
            startTime = sTime;
            endTime = eTime;
            subject = subj;
        }

        //getters
        inline T GetStartTime() { return startTime; };
        inline T GetEndTime() { return endTime; };
        inline string GetSubject() { return subject; };

        // == implementation
        inline bool operator == (Meeting_t otherMeeting) {
            return GetStartTime() == otherMeeting.GetStartTime();
        };

        inline bool operator < (Meeting_t otherMeeting) {
            return GetStartTime() < otherMeeting.GetStartTime();
        };

        inline bool operator > (Meeting_t otherMeeting) {
            return GetStartTime() > otherMeeting.GetStartTime();
        };

        inline void Print(){
            cout << "\n*** *** ***\n";

            cout << "\nSubject is:\n";
            cout << GetSubject();
            cout << "\nStart time is:\n";
            cout << GetStartTime();
            cout << "\nEnd time is:\n";
            cout << GetEndTime();
            cout << "\n";
        };

};

我的日历骨架如下：

#pragma once
#include <map>
#include "Meeting_t.h"

template <typename T>
class DayCalendar_t
{
public:
    //CTORs
    DayCalendar_t(){};

    //DTOR
    //Free all allocated memory allocated for the object
    ~DayCalendar_t(){};

private:
    //fields
    std::map<T, Meeting_t::template Meeting_t* <T>> MeetingMap;
};

如您所见，我选择使用c ++地图模板，但它抱怨最后一行的语法：

std::map<T, Meeting_t::template Meeting_t* <T>> MeetingMap;

我做错了什么？

Answer 1

应该是

std::map<T, Meeting_t<T>*> MeetingMap;

顺便说一句，你的默认构造函数是错误的，因为你无法从中返回一个值。

您似乎已编写此代码以防止某人使用默认构造函数，但您自动生成默认构造函数的语句错误，因为您提供了自定义构造函数。

使用其他模板的模板

1 个答案: