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我正在使用boost::icl::interval_map來維護City的區間搜索樹，並且它的高溫和低溫。我想將interval_map序列化爲一個文件。在編譯期間boost xml序列化失敗
該代碼適用於文本和二進制序列化，但是xml序列化無法編譯。以下是錯誤我得到
[email protected]:~/workspace/CPPCodes/interval-tree/city# make
g++ -o main -std=c++14 -g -ggdb -O0 main.cpp -lboost_serialization
In file included from /usr/include/boost/mpl/aux_/na_assert.hpp:23:0,
from /usr/include/boost/mpl/arg.hpp:25,
from /usr/include/boost/mpl/placeholders.hpp:24,
from /usr/include/boost/archive/basic_binary_iprimitive.hpp:52,
from /usr/include/boost/archive/binary_iarchive_impl.hpp:21,
from /usr/include/boost/archive/binary_iarchive.hpp:20,
from main.cpp:4:
/usr/include/boost/archive/basic_xml_oarchive.hpp: In instantiation of ‘void boost::archive::basic_xml_oarchive<Archive>::save_override(T&, int) [with T = const boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> >; Archive = boost::archive::xml_oarchive]’:
/usr/include/boost/archive/detail/interface_oarchive.hpp:63:9: required from ‘Archive& boost::archive::detail::interface_oarchive<Archive>::operator<<(T&) [with T = const boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> >; Archive = boost::archive::xml_oarchive]’
main.cpp:186:8: required from here
/usr/include/boost/archive/basic_xml_oarchive.hpp:99:9: error: no matching function for call to ‘assertion_failed(mpl_::failed************ boost::serialization::is_wrapper<const boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > >::************)’
BOOST_MPL_ASSERT((serialization::is_wrapper<T>));
^
/usr/include/boost/mpl/assert.hpp:83:5: note: candidate: template<bool C> int mpl_::assertion_failed(typename mpl_::assert<C>::type)
int assertion_failed(typename assert<C>::type);
^
/usr/include/boost/mpl/assert.hpp:83:5: note: template argument deduction/substitution failed:
/usr/include/boost/archive/basic_xml_oarchive.hpp:99:9: note: cannot convert ‘mpl_::assert_arg<boost::serialization::is_wrapper<const boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > > >(0u, 1)’ (type ‘mpl_::failed************ boost::serialization::is_wrapper<const boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > >::************’) to type ‘mpl_::assert<false>::type {aka mpl_::assert<false>}’
BOOST_MPL_ASSERT((serialization::is_wrapper<T>));
^
/usr/include/boost/archive/basic_xml_iarchive.hpp: In instantiation of ‘void boost::archive::basic_xml_iarchive<Archive>::load_override(T&, int) [with T = boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> >; Archive = boost::archive::xml_iarchive]’:
/usr/include/boost/archive/xml_iarchive.hpp:103:51: required from ‘void boost::archive::xml_iarchive_impl<Archive>::load_override(T&, int) [with T = boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> >; Archive = boost::archive::xml_iarchive]’
/usr/include/boost/archive/detail/interface_iarchive.hpp:60:9: required from ‘Archive& boost::archive::detail::interface_iarchive<Archive>::operator>>(T&) [with T = boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> >; Archive = boost::archive::xml_iarchive]’
main.cpp:194:8: required from here
/usr/include/boost/archive/basic_xml_iarchive.hpp:76:9: error: no matching function for call to ‘assertion_failed(mpl_::failed************ boost::serialization::is_wrapper<boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > >::************)’
BOOST_MPL_ASSERT((serialization::is_wrapper<T>));
^
/usr/include/boost/mpl/assert.hpp:83:5: note: candidate: template<bool C> int mpl_::assertion_failed(typename mpl_::assert<C>::type)
int assertion_failed(typename assert<C>::type);
^
/usr/include/boost/mpl/assert.hpp:83:5: note: template argument deduction/substitution failed:
/usr/include/boost/archive/basic_xml_iarchive.hpp:76:9: note: cannot convert ‘mpl_::assert_arg<boost::serialization::is_wrapper<boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > > >(0u, 1)’ (type ‘mpl_::failed************ boost::serialization::is_wrapper<boost::icl::interval_map<long unsigned int, boost::container::flat_set<City> > >::************’) to type ‘mpl_::assert<false>::type {aka mpl_::assert<false>}’
BOOST_MPL_ASSERT((serialization::is_wrapper<T>));
^
Makefile:7: recipe for target 'main' failed
make: *** [main] Error 1
繼BOOST_MPL_ASSERT編譯
// Anything not an attribute and not a name-value pair is an
// error and should be trapped here.
template<class T>
void save_override(T & t, BOOST_PFTO int)
{
// If your program fails to compile here, its most likely due to
// not specifying an nvp wrapper around the variable to
// be serialized.
BOOST_MPL_ASSERT((serialization::is_wrapper<T>));
this->detail_common_oarchive::save_override(t, 0);
}
過程中失敗的意見建議，我不使用NVP來包裹被序列化的成員。但是，我認爲，我已經使用了所有成員變量的BOOST_SERIALIZATION_NVP或boost::serialization::make_nvp。不知道發生了什麼事。
的代碼在這裏被推：https://github.com/prasad-joshi/CPPCodes/tree/xml_failure/interval-tree/city
這是相當多的代碼來查看，你可以嘗試做一個更簡單的例子嗎？ – jwimberley
非常感謝您查看代碼。這裏是最小的示例代碼https://github.com/prasad-joshi/CPPCodes/blob/xml_failure/interval-tree/city/main.cpp。儘管如此，它仍然是116行代碼。我已經放棄了反序列化代碼，並使用std :: set代替boost flat_set。 爲了給你一些想法，Code維護一個城市低溫和高溫的區間樹。我想序列化區間樹。 –