Estoy tratando de averiguar si esto es un requisito de cereal O no.
Sigo recibiendo errores que los constructores de clase (predeterminados) son privados, lo que he puesto allí por una razón.
Sin embargo, la línea de origen para el error parece ser, std :: make_shared, en lugar de cereal, que requiere un constructor predeterminado, pero ya es una clase de amigos y, por lo tanto, debería tener acceso a él.
/usr/include/c++/4.7/type_traits: In instantiation of ‘struct std::__is_default_constructible_impl<Concept>’:
/usr/include/c++/4.7/type_traits:116:12: required from ‘struct std::__and_<std::__not_<std::is_void<Concept> >, std::__is_default_constructible_impl<Concept> >’
/usr/include/c++/4.7/type_traits:682:12: required from ‘struct std::__is_default_constructible_atom<Concept>’
/usr/include/c++/4.7/type_traits:703:12: required from ‘struct std::__is_default_constructible_safe<Concept, false>’
/usr/include/c++/4.7/type_traits:709:12: required from ‘struct std::is_default_constructible<Concept>’
/usr/local/include/cereal/types/polymorphic.hpp:157:5: required by substitution of ‘template<class Archive, class T> typename std::enable_if<((! std::is_default_constructible<T>::value) && (! has_load_and_allocate<T, Archive>())), bool>::type cereal::polymorphic_detail::serialize_wrapper(Archive&, std::shared_ptr<_Tp2>&, uint32_t) [with Archive = cereal::XMLInputArchive; T = Concept]’
/usr/local/include/cereal/types/polymorphic.hpp:253:5: [ skipping 16 instantiation contexts ]
/usr/include/c++/4.7/bits/shared_ptr_base.h:525:8: required from ‘std::__shared_count<_Lp>::__shared_count(std::_Sp_make_shared_tag, _Tp*, const _Alloc&, _Args&& ...) [with _Tp = SemanticGraph<Concept>; _Alloc = std::allocator<SemanticGraph<Concept> >; _Args = {const char (&)[16]}; __gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2u]’
/usr/include/c++/4.7/bits/shared_ptr_base.h:997:35: required from ‘std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_make_shared_tag, const _Alloc&, _Args&& ...) [with _Alloc = std::allocator<SemanticGraph<Concept> >; _Args = {const char (&)[16]}; _Tp = SemanticGraph<Concept>; __gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2u]’
/usr/include/c++/4.7/bits/shared_ptr.h:317:64: required from ‘std::shared_ptr<_Tp>::shared_ptr(std::_Sp_make_shared_tag, const _Alloc&, _Args&& ...) [with _Alloc = std::allocator<SemanticGraph<Concept> >; _Args = {const char (&)[16]}; _Tp = SemanticGraph<Concept>]’
/usr/include/c++/4.7/bits/shared_ptr.h:599:39: required from ‘std::shared_ptr<_Tp1> std::allocate_shared(const _Alloc&, _Args&& ...) [with _Tp = SemanticGraph<Concept>; _Alloc = std::allocator<SemanticGraph<Concept> >; _Args = {const char (&)[16]}]’
/usr/include/c++/4.7/bits/shared_ptr.h:615:42: required from ‘std::shared_ptr<_Tp1> std::make_shared(_Args&& ...) [with _Tp = SemanticGraph<Concept>; _Args = {const char (&)[16]}]’
/home/alex/projects/Icarus/trunk/Api/ConnectionHandler/../../Processes/Controller/../../Datatypes/Domain/../../Handlers/SemanticNodeFactory/SemanticNodeFactory.hpp:34:82: required from here
/home/alex/projects/Icarus/trunk/Api/ConnectionHandler/../../Processes/Controller/../../Datatypes/Domain/../Episode/../State/../ConceptGraph/../Concept/Concept.hpp:27:5: error: ‘Concept::Concept()’ is private
¿Alguien puede explicarme por qué está sucediendo esto y, lo que es más importante, cómo podría resolverse, además de hacer públicos esos constructores?
EDITAR:
La línea de error de origen es de:
concept_map = std::make_shared<SemanticGraph<Concept>>( "concept_map.xml" );
Donde es SemanticGraph CTOR:
SemanticGraph
(
const std::string filename
)
:
_fname ( filename )
{
std::ifstream input( _fname );
if ( input.is_open() )
{
cereal::XMLInputArchive archive( input );
archive( _nodes );
}
}