[Boost-users] base_from_member problem

Subject: [Boost-users] base_from_member problem
From: Olaf Peter (ope-devel_at_[hidden])
Date: 2010-05-29 14:57:05

Hello,

in the example attached I've got the compiler error

base_from.cpp: In constructor ‘header_fixture::header_fixture()’:
base_from.cpp:48: error: type
‘client::detail::header_grammar<boost::spirit::karma::detail::output_iterator<const
char*, mpl_::int_<15>, boost::fusion::unused_type> >’ is not a direct
base of ‘header_fixture’
/home/olaf/Projects/programming/cpp/boost/trunk/boost/utility/base_from_member.hpp:69:
error:
‘client::detail::string_grammar<boost::spirit::karma::detail::output_iterator<const
char*, mpl_::int_<15>, boost::fusion::unused_type> >
boost::base_from_member<client::detail::string_grammar<boost::spirit::karma::detail::output_iterator<const
char*, mpl_::int_<15>, boost::fusion::unused_type> >, 0>::member’ is
protected

where the 2nd error is due to the 1st one. Why does it not work? without
karma::grammar it compiles. How to fix it?

Thanks,
Olaf