没有bool bin时struct A，代码起作用。在bool b那里时，ar & mat给出“输入流错误”，但std::array一个接一个地注册元素。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;
}
我没有发现可能出什么问题。然后，我与asan / ubsan一起查看，发现了域转换问题：http ://coliru.stacked-crooked.com/a/edee75a22450d9ee
起初我以为特定版本的Boost [¹]中可能会有错误。然后它突然降临在我身上。
有良性警告：
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_oarchive.hpp:65:50: runtime error: load of value 255, which is not a valid value for type 'bool'
注意它们是如何oarchive运行的，并确认：
debug: "22 serialization::archive 17 0 0 0 0 3 -2049146224 32767 -2049145920 1
"
这些是...不确定的值。对于完整的积分域而言，这不是一个大问题，但对于布尔而言。因此，请修复您的初始化：
struct A {
std::array<int, 3> mat {};
bool b {};
template <class Ar> void serialize(Ar& ar, unsigned) {
ar & mat & b;
}
};
当然，您可以使用其他样式：
std::array<int, 3> mat = {0,0,0};
bool b = false;
或老式的构造函数：
std::array<int, 3> mat;
bool b;
A(std::array<int, 3> mat = {}, bool b = {}) : mat(mat), b(b) {}
等等，只要您确保初始化成员数据即可。
#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;
}
}
版画
BOOST_VERSION: 107500
debug: "22 serialization::archive 18 0 0 0 0 3 0 0 0 0
"
[¹]这就是野鹅追逐的样子
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我来说两句