C++ C++；Boost-序列化错误-传递‘；常数B’；as‘；这’；参数丢弃限定符

我正在尝试使用

Boost

序列化一个简单的类。我的类只包含一个

std:：vector

，如下面的代码所示。我的问题是，当我按照进行时，我得到了下面描述的错误。我不知道为什么，因为我没有在任何地方定义

const

。你知道吗，我做错了什么

---

我的代码：

---

解决方案：

您的

save（）

方法需要像这样声明

const

：

void save(Archive & ar, const unsigned int version) const {
...

这将使它编译时不会出错。此外，如果您想要完整的无警告编译，那么还可以将

save（）

中的

for

循环修改为如下所示（将

i

的类型从

int

更改为

size\t

）：

---

因此，它希望得到一个

常量T&

。但是，它将满足于常规的

T&

，因为当需要

const

参数时，接受非

const

。但是，它尝试将其用作常量，但没有任何效果，因为它调用的方法根本没有定义

const

，因此您值得信赖的编译器非常明智，立即阻止了您：）

谢谢！但我想，只有

save

方法应该是

const

，因为

load

是

const

使得无法初始化正在加载的对象的属性。@Eenoku当然100%同意并更正了。我心不在焉，匆忙地写信。我道歉。无论如何，现在答案是完整的。希望有帮助。

In file included from /usr/include/boost/serialization/extended_type_info_typeid.hpp:37,
                 from /usr/include/boost/archive/detail/oserializer.hpp:39,
                 from /usr/include/boost/archive/detail/interface_oarchive.hpp:23,
                 from /usr/include/boost/archive/detail/common_oarchive.hpp:22,
                 from /usr/include/boost/archive/basic_text_oarchive.hpp:29,
                 from /usr/include/boost/archive/text_oarchive.hpp:31,
                 from /home/martin/CLionProjects/boost_serialization_example/main.cpp:4:
/usr/include/boost/serialization/access.hpp: In instantiation of ‘static void boost::serialization::access::member_save(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive; T = const B]’:
/usr/include/boost/serialization/split_member.hpp:43:32:   required from ‘static void boost::serialization::detail::member_saver<Archive, T>::invoke(Archive&, const T&, unsigned int) [with Archive = boost::archive::text_oarchive; T = B]’
/usr/include/boost/serialization/split_member.hpp:69:18:   required from ‘void boost::serialization::split_member(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive; T = B]’
/home/martin/CLionProjects/boost_serialization_example/main.cpp:35:5:   required from ‘void B::serialize(Archive&, unsigned int) [with Archive = boost::archive::text_oarchive]’
/usr/include/boost/serialization/access.hpp:116:9:   required from ‘static void boost::serialization::access::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive; T = B]’
/usr/include/boost/serialization/serialization.hpp:68:22:   required from ‘void boost::serialization::serialize(Archive&, T&, unsigned int) [with Archive = boost::archive::text_oarchive; T = B]’
/usr/include/boost/serialization/serialization.hpp:126:14:   [ skipping 4 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]
/usr/include/boost/archive/detail/oserializer.hpp:310:22:   required from ‘static void boost::archive::detail::save_non_pointer_type<Archive>::invoke(Archive&, const T&) [with T = B; Archive = boost::archive::text_oarchive]’
/usr/include/boost/archive/detail/oserializer.hpp:534:18:   required from ‘void boost::archive::save(Archive&, T&) [with Archive = boost::archive::text_oarchive; T = const B]’
/usr/include/boost/archive/detail/common_oarchive.hpp:70:22:   required from ‘void boost::archive::detail::common_oarchive<Archive>::save_override(T&) [with T = const B; Archive = boost::archive::text_oarchive]’
/usr/include/boost/archive/basic_text_oarchive.hpp:83:9:   required from ‘void boost::archive::basic_text_oarchive<Archive>::save_override(T&) [with T = const B; Archive = boost::archive::text_oarchive]’
/usr/include/boost/archive/detail/interface_oarchive.hpp:70:9:   required from ‘Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(const T&) [with T = B; Archive = boost::archive::text_oarchive]’
/home/martin/CLionProjects/boost_serialization_example/main.cpp:107:15:   required from here
/usr/include/boost/serialization/access.hpp:91:9: error: passing ‘const B’ as ‘this’ argument discards qualifiers [-fpermissive]
         t.save(ar, file_version);

template<class Archive>
void save(Archive & ar, const unsigned int version){
    ar & this->v->size();
    for(int i = 0; i < this->v->size(); i++) {
        ar & (*this->v)[i];
    }
};

template<class Archive>
void load(Archive & ar, const unsigned int version) {
    size_t size;
    int tmp;
    ar & size;

    this->v = new std::vector<int>(size);
    for(int i = 0; i < size; i++) {
        ar & tmp;
        (*this->v)[i] = tmp;
    }
}

void save(Archive & ar, const unsigned int version) const {
...

for (size_t i = 0; i < this->v->size(); i++)

oa << b;

'Archive &boost::archive::detail::interface_oarchive<Archive>::operator <<<B>(const T &)'