Field `.` has incomplete type boost::weak_ptr

@andrejap · Регистрация: 21.04.2013

Author24 — интернет-сервис помощи студентам

Здравствуйте!
Интересует вопрос: если член класса имеет тип weak_ptr, то требуется определение класса, а "forward-ного" объявления недостаточно?

C++

#ifndef SUBJECT_HXX
#define SUBJECT_HXX
 
#include <string>
#include <boost/date_time.hpp>
#include <iostream>
 
namespace TimeTableCore {
    class Group;
    class Lecturer;
 
    class baseSubject {
        std::string name;
        boost::weak_ptr<Group> group;       // <--тут ошибка
        boost::weak_ptr<Lecturer> lecturer; // <--тут ошибка
        boost::gregorian::date deadline;
    public:
 
        baseSubject(const std::string& nname)
        : name(nname) { }
 
        virtual ~baseSubject() = 0;
 
        virtual void Info() const;
        const std::string& Name() const { return name; } //INLINE
    };
 
    //classes-parameters
 
    struct Ex {
        static const int freeDays = 2;
    };
 
    struct Cr {
    };
 
    struct NoAdd {
        static const int freeDays = 0;
    };
 
    struct StateEx {
        static const int freeDays = 5;
    };
 
    struct StateFinalEx {
        static const int freeDays = 2;
    };
 
    struct NoLabs {
    };
 
    struct Labs {
        boost::weak_ptr<Lecturer> secondLecturer; // <--тут ошибка
    };
 
}
#endif

Вывод gcc:

Кликните здесь для просмотра всего текста

In file included from TSubject.hxx:4:0,
from LoadData.hpp:12,
from LoadData.cpp:2:
Subject.hxx:14:26: error: field ‘group’ has incomplete type ‘boost::weak_ptr<TimeTableCore::Group>’
boost::weak_ptr<Group> group;
^
Subject.hxx:15:29: error: field ‘lecturer’ has incomplete type ‘boost::weak_ptr<TimeTableCore::Lecturer>’
boost::weak_ptr<Lecturer> lecturer;
^
Subject.hxx:53:29: error: field ‘secondLecturer’ has incomplete type ‘boost::weak_ptr<TimeTableCore::Lecturer>’
boost::weak_ptr<Lecturer> secondLecturer;
^

Вывод clang:

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In file included from LoadData.cpp:2:
In file included from ./LoadData.hpp:12:
In file included from ./TSubject.hxx:4:
./Subject.hxx:14:26: error: implicit instantiation of undefined template 'boost::weak_ptr<TimeTableCore::Group>'
boost::weak_ptr<Group> group;
^
/usr/include/boost/smart_ptr/shared_ptr.hpp:723:36: note: template is declared here
template<class Y> friend class weak_ptr;
^
In file included from LoadData.cpp:2:
In file included from ./LoadData.hpp:12:
In file included from ./TSubject.hxx:4:
./Subject.hxx:15:29: error: implicit instantiation of undefined template 'boost::weak_ptr<TimeTableCore::Lecturer>'
boost::weak_ptr<Lecturer> lecturer;
^
/usr/include/boost/smart_ptr/shared_ptr.hpp:723:36: note: template is declared here
template<class Y> friend class weak_ptr;
^
In file included from LoadData.cpp:2:
In file included from ./LoadData.hpp:12:
In file included from ./TSubject.hxx:4:
./Subject.hxx:53:29: error: implicit instantiation of undefined template 'boost::weak_ptr<TimeTableCore::Lecturer>'
boost::weak_ptr<Lecturer> secondLecturer;
^
/usr/include/boost/smart_ptr/shared_ptr.hpp:723:36: note: template is declared here
template<class Y> friend class weak_ptr;
^

DiffEreD · 15.12.2014, 10:51

boost/weak_ptr.hpp подключен?

@andrejap · 15.12.2014, 12:33 **[ТС]**

DiffEreD, ))

DiffEreD 1458 / 795 / 257 Регистрация: 21.06.2011 Сообщений: 1,740 Записей в блоге: 2
	15.12.2014, 10:51	2
	boost/weak_ptr.hpp подключен? 1

@andrejap 13 / 13 / 7 Регистрация: 21.04.2013 Сообщений: 245
	15.12.2014, 12:33 [ТС]	3
	DiffEreD, )) 0