|| g++ -c main.cpp -W -Wall -pedantic -std=c++0x
|| /usr/include/boost/variant/variant.hpp: In instantiation of ‘boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::variant(T&) [with T = c_fwd; T0_ = boost::recursive_wrapper<c_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’:
main.cpp|28 col 24| required from ‘b_fwd::b_fwd(Ts ...) [with Ts = {c_fwd}]’
/usr/include/boost/variant/variant.hpp|1261 col 61| required from ‘int boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_copy_into::internal_visit(T&, int) const [with T = const c_fwd; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’
/usr/include/boost/variant/variant.hpp|1305 col 54| required from ‘int boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_copy_into::internal_visit(const boost::recursive_wrapper<T>&, long int) const [with T = c_fwd; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’
/usr/include/boost/variant/detail/visitation_impl.hpp|145 col 13| required from ‘typename Visitor::result_type boost::detail::variant::visitation_impl_invoke_impl(int, Visitor&, VoidPtrCV, T*, mpl_::false_) [with Visitor = boost::variant<boost::recursive_wrapper<b_fwd> >::convert_copy_into; VoidPtrCV = const void*; T = boost::recursive_wrapper<c_fwd>; typename Visitor::result_type = int; mpl_::false_ = mpl_::bool_<false>]’
/usr/include/boost/variant/detail/visitation_impl.hpp|173 col 9| required from ‘typename Visitor::result_type boost::detail::variant::visitation_impl_invoke(int, Visitor&, VoidPtrCV, T*, NoBackupFlag, int) [with Visitor = boost::variant<boost::recursive_wrapper<b_fwd> >::convert_copy_into; VoidPtrCV = const void*; T = boost::recursive_wrapper<c_fwd>; NoBackupFlag = boost::variant<boost::recursive_wrapper<c_fwd> >::has_fallback_type_; typename Visitor::result_type = int]’
/usr/include/boost/variant/detail/visitation_impl.hpp|260 col 1| [ skipping 2 instantiation contexts ]
/usr/include/boost/variant/variant.hpp|1824 col 13| required from ‘typename Visitor::result_type boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::internal_apply_visitor(Visitor&) const [with Visitor = boost::variant<boost::recursive_wrapper<b_fwd> >::convert_copy_into; T0_ = boost::recursive_wrapper<c_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_
|| ; T19 = boost::detail::variant::void_; typename Visitor::result_type = int]’
/usr/include/boost/variant/variant.hpp|1342 col 9| required from ‘void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct(Variant&, long int, mpl_::true_) [with Variant = const boost::variant<boost::recursive_wrapper<c_fwd> >; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::vari
|| ant::void_; mpl_::true_ = mpl_::bool_<true>]’
/usr/include/boost/variant/variant.hpp|1368 col 9| required from ‘void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct_variant(Variant&) [with Variant = const boost::variant<boost::recursive_wrapper<c_fwd> >; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’
/usr/include/boost/variant/variant.hpp|1389 col 9| required from ‘void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct(const boost::variant<U0, U1, U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12, U13, U14, U15, U16, U17, U18, U19>&, long int) [with U0 = boost::recursive_wrapper<c_fwd>; U1 = boost::detail::variant::void_; U2 = boost::detail::variant::void_; U3 = boost::detail::variant::void_; U4 = boost::detail::variant::void_; U5 = boost::detail::variant::void_; U6 = boost::detail::variant::void_; U7 = boost::detail::variant::void_; U8 = boost::detail::variant::void_; U9 = boost::detail::variant::void_; U10 = boost::detail::variant::void_; U11 = boost::detail::variant::void_; U12 = boost::detail::variant::void_; U13 = boost::detail::variant::void_; U14 = boost::detail::variant::void_; U15 = boost::detail::variant::void_; U16 = boost::detail::variant::void_; U17 = boost::detail::variant::void_; U18 = boost::detail::variant::void_; U1
|| 9 = boost::detail::variant::void_; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’
/usr/include/boost/variant/variant.hpp|1399 col 9| required from ‘boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::variant(const T&) [with T = boost::variant<boost::recursive_wrapper<c_fwd> >; T0_ = boost::recursive_wrapper<b_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]’
main.cpp|54 col 17| required from here
/usr/include/boost/variant/variant.hpp|1405 col 9| error: call of overloaded ‘convert_construct(c_fwd&, long int)’ is ambiguous
/usr/include/boost/variant/variant.hpp|1405 col 9| note: candidates are:
/usr/include/boost/variant/variant.hpp|1315 col 10| note: void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct(T&, int, mpl_::false_) [with T = c_fwd; T0_ = boost::recursive_wrapper<c_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_; mpl_::false_ = mpl_::bool_<false>]
/usr/include/boost/variant/variant.hpp|1375 col 10| note: void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct(boost::variant<U0, U1, U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12, U13, U14, U15, U16, U17, U18, U19>&, long int) [with U0 = double; U1 = char*; U2 = boost::detail::variant::void_; U3 = boost::detail::variant::void_; U4 = boost::detail::variant::void_; U5 = boost::detail::variant::void_; U6 = boost::detail::variant::void_; U7 = boost::detail::variant::void_; U8 = boost::detail::variant::void_; U9 = boost::detail::variant::void_; U10 = boost::detail::variant::void_; U11 = boost::detail::variant::void_; U12 = boost::detail::variant::void_; U13 = boost::detail::variant::void_; U14 = boost::detail::variant::void_; U15 = boost::detail::variant::void_; U16 = boost::detail::variant::void_; U17 = boost::detail::variant::void_; U18 = boost::detail::variant::void_; U19 = boost::detail::variant::void_; T0_ = boost::recursive_wrapper<
|| _fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]
/usr/include/boost/variant/variant.hpp|1384 col 10| note: void boost::variant<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19>::convert_construct(const boost::variant<U0, U1, U2, U3, U4, U5, U6, U7, U8, U9, U10, U11, U12, U13, U14, U15, U16, U17, U18, U19>&, long int) [with U0 = double; U1 = char*; U2 = boost::detail::variant::void_; U3 = boost::detail::variant::void_; U4 = boost::detail::variant::void_; U5 = boost::detail::variant::void_; U6 = boost::detail::variant::void_; U7 = boost::detail::variant::void_; U8 = boost::detail::variant::void_; U9 = boost::detail::variant::void_; U10 = boost::detail::variant::void_; U11 = boost::detail::variant::void_; U12 = boost::detail::variant::void_; U13 = boost::detail::variant::void_; U14 = boost::detail::variant::void_; U15 = boost::detail::variant::void_; U16 = boost::detail::variant::void_; U17 = boost::detail::variant::void_; U18 = boost::detail::variant::void_; U19 = boost::detail::variant::void_; T0_ = boost::recursive_wr
|| pper<c_fwd>; T1 = boost::detail::variant::void_; T2 = boost::detail::variant::void_; T3 = boost::detail::variant::void_; T4 = boost::detail::variant::void_; T5 = boost::detail::variant::void_; T6 = boost::detail::variant::void_; T7 = boost::detail::variant::void_; T8 = boost::detail::variant::void_; T9 = boost::detail::variant::void_; T10 = boost::detail::variant::void_; T11 = boost::detail::variant::void_; T12 = boost::detail::variant::void_; T13 = boost::detail::variant::void_; T14 = boost::detail::variant::void_; T15 = boost::detail::variant::void_; T16 = boost::detail::variant::void_; T17 = boost::detail::variant::void_; T18 = boost::detail::variant::void_; T19 = boost::detail::variant::void_]
|| make: *** [main.o] Error 1