c++ - Does boost::variant support 64bit integers? -

i tried use boost::variant combined 64 bit integer. unfortunately didn't work. there way fix this? or boost version old? i'm using v1.45.

this declaration works:

std::vector< boost::variant<int, float64_t> > vec2; 

this declaration doesn't work:

std::vector< boost::variant<long long int, float64_t> > vec2; 

edit

it's compiler error:

error c2668: 'boost::detail::variant::make_initializer_node::apply<baseindexpair,iterator>::initializer_node::initialize' : ambiguous call overloaded function 1>          1>          [ 1>              baseindexpair=boost::mpl::pair<boost::detail::variant::make_initializer_node::apply<boost::mpl::pair<boost::detail::variant::make_initializer_node::apply<boost::mpl::pair<boost::detail::variant::initializer_root,boost::mpl::int_<0>>,boost::mpl::l_iter<boost::mpl::list3<__int64,double,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>>::initializer_node,boost::mpl::int_<1>>,boost::mpl::l_iter<boost::mpl::list2<double,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>>::initializer_node,boost::mpl::int_<2>>, 1>              iterator=boost::mpl::l_iter<boost::mpl::list1<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>> 1>          ] 1>          boost-1_45_0\boost\variant\detail\initializer.hpp(89): 'int boost::detail::variant::make_initializer_node::apply<baseindexpair,iterator>::initializer_node::initialize(void *,const __int64 &)' 1>          1>          [ 1>              baseindexpair=boost::mpl::pair<boost::detail::variant::initializer_root,boost::mpl::int_<0>>, 1>              iterator=boost::mpl::l_iter<boost::mpl::list3<__int64,double,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>> 1>          ] 1>          boost-1_45_0\boost\variant\detail\initializer.hpp(89): or       'int boost::detail::variant::make_initializer_node::apply<baseindexpair,iterator>::initializer_node::initialize(void *,const double &)' 1>          1>          [ 1>              baseindexpair=boost::mpl::pair<boost::detail::variant::make_initializer_node::apply<boost::mpl::pair<boost::detail::variant::initializer_root,boost::mpl::int_<0>>,boost::mpl::l_iter<boost::mpl::list3<__int64,double,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>>>::initializer_node,boost::mpl::int_<1>>, 1>              iterator=boost::mpl::l_iter<boost::mpl::list2<double,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>> 1>          ] 1>          while trying match argument list '(void *, const int)' 1>          boost-1_45_0\boost\variant\variant.hpp(1373) : see reference function template instantiation 'void boost::variant<t0_,t1,t2>::convert_construct<const t>(t &,int,boost::mpl::false_)' being compiled 1>          1>          [ 1>              t0_=__int64, 1>              t1=float64_t, 1>              t2=std::string, 1>              t=int 1>          ] 1>          (1900) : see reference function template instantiation 'boost::variant<t0_,t1,t2>::variant<int>(const t &)' being compiled 1>          1>          [ 1>              t0_=__int64, 1>              t1=float64_t, 1>              t2=std::string, 1>              t=int 1>          ] 

edit

the error in code not posted. @hvd has found fault anyway. must explicitly name type - if it's int64.

no error:

std::vector <boost::variant <int, float64_t> > vec; vec.push_back ( 22 ); 

compiler error:

std::vector <boost::variant <__int64, float64_t> > vec; vec.push_back ( 22 ); 

no error:

std::vector <boost::variant <__int64, float64_t> > vec; vec.push_back ( (__int64) 22 ); 

to give short answer: boost::variant support 64bit integers.

but if value assigned boost::variant ambiguous can lead compiler errors (e.g. boost::variant support float , integers , try assign integer). in case explicit typ conversion solves problem.