C++ 使用std:：array时出现输入流问题

当

struct A

中没有

bool b

时，代码工作。当

bool b

存在时，

ar&mat

给出“输入流错误”，但逐个注册

std:：array

的元素是有效的。这里怎么了

#include <fstream>
#include <boost/serialization/array.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>

struct A
{
    std::array<int, 3> mat;
    bool b;

    template<class Archive> void serialize(Archive& ar, const unsigned int version)
    {
        //ar & mat[0];
        //ar & mat[1];
        //ar & mat[2];
        ar & mat;
        ar & b;
    }
};


int main()
{
    {
        std::string fname = "save.sr";
        std::ofstream ofs(fname);
        boost::archive::text_oarchive oa(ofs);
        A a;
        oa << a;
    }

    {
        std::string fname = "save.sr";
        std::ifstream ifs(fname);
        boost::archive::text_iarchive ia(ifs);
        A a;
        ia >> a;
    }

    return 0;
}

#包括
#包括
#包括
#包括
结构A
{
阵列天线；
布尔b；
模板无效序列化（存档&ar，常量未签名整数版本）
{
//ar&mat[0]；
//ar&mat[1]；
//ar&mat[2]；
ar&mat；
ar&b；
}
};
int main（）
{
{
std:：string fname=“save.sr”；
std：：ofs流（fname）；
boost:：archive:：text\u oarchive oa（ofs）；
A A；
oa>a；
}
返回0；
}

我看不出有什么问题。然后我查看了asan/ubsan，发现了域转换问题：

起初，我认为Boost[1]的特定版本中可能会有一个bug。然后我明白了

有一些良性警告：

g++ -std=c++17 -O2 -Wall -pedantic -pthread main.cpp -fsanitize=address,undefined -lboost_serialization && ./a.out
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct oserializer'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct iserializer'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct oserializer'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct iserializer'
/usr/local/include/boost/serialization/singleton.hpp:181:12: runtime error: reference binding to null pointer of type 'const struct extended_type_info_typeid'

然后我们得到了域错误：

/usr/local/include/boost/archive/text\u oarchive.hpp:65:50:运行时错误：加载值255，该值对于类型“bool”无效。

注意是如何运行到它们的

oarchive

，并确认：

debug: "22 serialization::archive 17 0 0 0 0 3 -2049146224 32767 -2049145920 1
"

那些是。。。不确定值。对于一个完整的积分域来说，这不是一个大问题，但对于bool来说却是一个大问题。因此，修复您的初始化：

struct A {
    std::array<int, 3> mat {};
    bool b {};

    template <class Ar> void serialize(Ar& ar, unsigned) {
        ar & mat & b;
    }
};

---

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---

“ar&mat给出错误”请分享此错误。标题不允许我写“输入流错误”，让我写“输入流问题”。然后我忘了在内容中提到错误消息。我尝试初始化

std:：array

，但从未想到bool可能是问题的原因。非常感谢。

std::array<int, 3> mat = {0,0,0};
bool b = false;

std::array<int, 3> mat;
bool b;

A(std::array<int, 3> mat = {}, bool b = {}) : mat(mat), b(b) {}

#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/serialization/array.hpp>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <boost/version.hpp>

struct A {
    std::array<int, 3> mat = {0,0,0};
    bool b = false;

    template <class Ar> void serialize(Ar& ar, unsigned) {
        ar & mat & b;
    }
};

int main() {
    std::stringstream ss;
    {
        boost::archive::text_oarchive oa(ss);
        A a;
        oa << a;
    }

    std::cout << "BOOST_VERSION: " << BOOST_VERSION << "\n";
    std::cout << "debug: " << std::quoted(ss.str()) << "\n";

    {
        boost::archive::text_iarchive ia(ss);
        A a;
        ia >> a;
    }
}

BOOST_VERSION: 107500
debug: "22 serialization::archive 18 0 0 0 0 3 0 0 0 0
"