1>boost\boost/fusion/support/detail/and.hpp(22): error C2872: 'true_type': ambiguous symbol1>boost\boost/type_traits/integral_constant.hpp(101): note: could be 'boost::integral_constant<bool,true> boost::true_type'1>boost\boost/spirit/home/support/common_terminals.hpp(87): note: or       'boost::spirit::true_type'1>boost\boost/fusion/support/detail/and.hpp(26): note: see reference to class template instantiation 'boost::fusion::detail::and_impl<>' being compiled1>boost\boost/fusion/support/detail/and.hpp(36): note: see reference to class template instantiation 'boost::fusion::detail::and_impl1<>' being compiled1>boost\boost/spirit/home/support/terminal.hpp(44): note: see reference to class template instantiation 'boost::fusion::detail::and_<>' being compiled1>boost\boost/proto/detail/preprocessed/expr_variadic.hpp(50): note: see reference to class template instantiation 'boost::spirit::terminal_ex<Terminal,boost::fusion::vector<const T (&)[6]>>' being compiled1>        with1>        [1>            Terminal=boost::spirit::tag::lit,1>            T=char1>        ]1>cpp-netlib\boost/network/protocol/http/server/impl/parsers.ipp(54): note: see reference to class template instantiation 'boost::proto::exprns_::expr<boost::proto::tagns_::tag::terminal,boost::proto::argsns_::term<T>,0>' being compiled1>        with1>        [1>            T=boost::spirit::terminal_ex<boost::spirit::tag::lit,boost::fusion::vector<const char (&)[6]>>1>        ]