似乎boost序列化无法从基于文本的归档中恢复值Nan和inf.
程序将终止,除非你在这种情况下处理archive_exception,任何解决方案？
解决方法
图书馆
has this to say的作者：
The simple truth is I never consider this.
When it came up the last time I didn’t really think about it very much as I
was involved in other things and I hoped intereste[d] parties might come to a
consensus without my having to bend my over-stretched brain.(goes on to discuss workarounds)
这似乎是正确的,在我的测试中只有二进制档案支持inf / nan.
除了nan / inf之外,Xml和文本存档都支持所有精度：
using BIA = boost::archive::binary_iarchive;
using BOA = boost::archive::binary_oarchive;
using TIA = boost::archive::text_iarchive;
using TOA = boost::archive::text_oarchive;
using XIA = boost::archive::xml_iarchive;
using XOA = boost::archive::xml_oarchive;
int main() {
// supported:
assert((perform_test<BIA,BOA,use_nan,use_inf,use_range>()));
assert((perform_test<XIA,XOA,no_nan,no_inf,use_range>()));
assert((perform_test<TIA,TOA,use_range>()));
// not supported:
assert(!(perform_test<XIA,use_inf>()));
assert(!(perform_test<TIA,use_inf>()));
assert(!(perform_test<XIA,no_inf>()));
assert(!(perform_test<TIA,no_inf>()));
}
完整清单
后人：
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/serialization/vector.hpp>
#include <sstream>
using namespace boost::archive;
static bool equal_or_nan(double a,double b) {
return (std::isnan(a) && std::isnan(b)) || a==b;
}
template <typename IA,typename OA,bool withNan = true,bool withInf = true,bool withRange = true>
bool perform_test()
{
std::vector<double> const v {
withRange? std::numeric_limits<double>::min() : 0,withRange? std::numeric_limits<double>::max() : 0,withRange? std::numeric_limits<double>::epsilon() : 0,withNan? std::numeric_limits<double>::quiet_NaN() : 0,withInf? std::numeric_limits<double>::infinity() : 0,withInf? - std::numeric_limits<double>::infinity() : 0,};
std::stringstream ss;
{
OA oa(ss);
oa << boost::serialization::make_nvp("element",v);
}
try
{
IA ia(ss);
std::vector<double> w;
ia >> boost::serialization::make_nvp("element",w);
return std::equal(v.begin(),v.end(),w.begin(),equal_or_nan);
} catch(...) {
return false;
}
}
static constexpr bool use_inf = true,use_nan = true,use_range = true;
static constexpr bool no_inf = false,no_nan = false,no_range = false;
using BIA = boost::archive::binary_iarchive;
using BOA = boost::archive::binary_oarchive;
using TIA = boost::archive::text_iarchive;
using TOA = boost::archive::text_oarchive;
using XIA = boost::archive::xml_iarchive;
using XOA = boost::archive::xml_oarchive;
int main() {
// supported:
assert((perform_test<BIA,no_inf>()));
}
