В настоящее время я пытаюсь создать Serializable базового класса со статическими функциями для сериализации и десериализации производных объектов класса. Я прочитал документацию Cereal о регистрации полиморфных отношений и о том, как регистрировать типы, а также о том, как объявлять функции сериализации. Цель состоит в том, чтобы использовать Serializable следующим образом:
std::stringstream& ss Serializable::serialize(test);
Я использую инструменты платформы Visual Studio 2017 (v141). Целевой Windows SDK — 10.0.17134.0.
Но я не могу создать свое приложение и получить эти 2 ошибки 3 раза:
Error C2338 cereal could not find any output serialization functions for the provided type and archive combination.
Error C2338 cereal could not find any input serialization functions for the provided type and archive combination.
Это мой код:
#pragma once
#include <string>
#include <cereal/archives/portable_binary.hpp>
class Serializable
{
public:
Serializable() = default;
~Serializable() = default;
virtual bool isAccessible() = 0;
static std::stringstream serialize(std::shared_ptr<Serializable> serializable);
static std::shared_ptr<Serializable> deserialize(std::stringstream& serialized);
};
Serializable.cpp
#include "Serializable.hpp"
std::stringstream Serializable::serialize(std::shared_ptr<Serializable> serializable)
{
std::stringstream ss;
{
cereal::PortableBinaryOutputArchive ar(ss);
ar << serializable;
}
return ss;
}
std::shared_ptr<Serializable> Serializable::deserialize(std::stringstream& serialized)
{
cereal::PortableBinaryInputArchive ar(serialized);
std::shared_ptr<Serializable> result = nullptr;
ar >> result;
return result;
}
TestObject.hpp
#pragma once
#include "Serializable.hpp"
#include <string>
#include <cereal/types/string.hpp>
#include <cereal/types/polymorphic.hpp>
#include <cereal/types/base_class.hpp>
class TestObject : public Serializable
{
public:
TestObject() = default;
TestObject(const std::string& name);
~TestObject() = default;
std::string getName() const { return this->name; };
template<class Archive>
void serialize(Archive& ar)
{
ar(cereal::base_class<Serializable>(this), name);
};
virtual bool isAccessible() {
return true;
};
private:
std::string name;
};
CEREAL_REGISTER_TYPE(TestObject)
CEREAL_REGISTER_POLYMORPHIC_RELATION(Serializable,TestObject)
TestObject.cpp
#include "TestObject.hpp"
TestObject::TestObject(const std::string& name)
:TestObject(name){}
main.cpp
#include "TestObject.hpp"
#include "Serializable.hpp"
#include <memory>
#include <iostream>
#include <string>
int main(int argc, char **argv)
{
std::shared_ptr<Serializable> test(new TestObject("Test"));
auto ss = Serializable::serialize(test);
std::shared_ptr<Serializable> deserialized = Serializable::deserialize(ss);
auto test2 = dynamic_cast<TestObject*>(deserialized.get());
std::cout << test2->getName();
system("timeout 3");
return 0;
}
Это полная ошибка здания:
1>------ Build started: Project: SerializableTest, Configuration: Debug Win32 ------
1>TestObject.cpp
1>Serializable.cpp
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(462): error C2338: cereal could not find any output serialization functions for the provided type and archive combination.
1>
1> Types must either have a serialize function, load/save pair, or load_minimal/save_minimal pair (you may not mix these).
1> Serialize functions generally have the following signature:
1>
1> template<class Archive>
1> void serialize(Archive & ar)
1> {
1> ar( member1, member2, member3 );
1> }
1>
1>
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(347): note: see reference to function template instantiation 'ArchiveType &cereal::OutputArchive<ArchiveType,1>::processImpl<std::shared_ptr<Serializable>,0>(const T &)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryOutputArchive,
1> T=std::shared_ptr<Serializable>
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(347): note: see reference to function template instantiation 'ArchiveType &cereal::OutputArchive<ArchiveType,1>::processImpl<std::shared_ptr<Serializable>,0>(const T &)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryOutputArchive,
1> T=std::shared_ptr<Serializable>
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(290): note: see reference to function template instantiation 'void cereal::OutputArchive<cereal::PortableBinaryOutputArchive,1>::process<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(290): note: see reference to function template instantiation 'void cereal::OutputArchive<cereal::PortableBinaryOutputArchive,1>::process<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\serializable.cpp(8): note: see reference to function template instantiation 'ArchiveType &cereal::OutputArchive<ArchiveType,1>::operator <<<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryOutputArchive,
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\serializable.cpp(8): note: see reference to function template instantiation 'ArchiveType &cereal::OutputArchive<ArchiveType,1>::operator <<<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryOutputArchive,
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(851): error C2338: cereal could not find any input serialization functions for the provided type and archive combination.
1>
1> Types must either have a serialize function, load/save pair, or load_minimal/save_minimal pair (you may not mix these).
1> Serialize functions generally have the following signature:
1>
1> template<class Archive>
1> void serialize(Archive & ar)
1> {
1> ar( member1, member2, member3 );
1> }
1>
1>
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(730): note: see reference to function template instantiation 'ArchiveType &cereal::InputArchive<ArchiveType,1>::processImpl<std::shared_ptr<Serializable>,0>(const T &)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryInputArchive,
1> T=std::shared_ptr<Serializable>
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(730): note: see reference to function template instantiation 'ArchiveType &cereal::InputArchive<ArchiveType,1>::processImpl<std::shared_ptr<Serializable>,0>(const T &)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryInputArchive,
1> T=std::shared_ptr<Serializable>
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(660): note: see reference to function template instantiation 'void cereal::InputArchive<cereal::PortableBinaryInputArchive,1>::process<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\lib\cereal\include\cereal\cereal.hpp(660): note: see reference to function template instantiation 'void cereal::InputArchive<cereal::PortableBinaryInputArchive,1>::process<std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\serializable.cpp(17): note: see reference to function template instantiation 'ArchiveType &cereal::InputArchive<ArchiveType,1>::operator >><std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryInputArchive,
1> T=std::shared_ptr<Serializable> &
1> ]
1>k:\programme\c++\serializabletest\networkdebugs\serializabletest\serializable.cpp(17): note: see reference to function template instantiation 'ArchiveType &cereal::InputArchive<ArchiveType,1>::operator >><std::shared_ptr<Serializable>&>(T)' being compiled
1> with
1> [
1> ArchiveType=cereal::PortableBinaryInputArchive,
1> T=std::shared_ptr<Serializable> &
1> ]
1>main.cpp
1>Generating Code...
1>Done building project "SerializableTest.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
;
. то естьclass Foo {};
- person JHBonarius   schedule 31.07.2018Serializable::serialize
вы создаете локальный объектss
, который вы возвращаете по ссылке. Вам не кажется, что это может создать проблему? (учитывая, что локальные переменные уничтожаются после завершения функции...);) - person JHBonarius   schedule 31.07.2018