From looking at the docs, is it because you're wrapping the member type in parens?
BOOST_FUSION_DEFINE_STRUCT( (namespace0)(namespace1)..., struct_name, (member_type0, member_name0) (member_type1, member_name1) ... ) that is, have you tried: BOOST_FUSION_DEFINE_STRUCT( (demo), curves, (std::map<std::string, std::string>, futures) (std::map<std::string, std::string>, credit_curves) ) On 30 July 2017 at 17:25, Robert Jones via Boost-users < boost-users@lists.boost.org> wrote:
Hi Peeps
Can anyone tell me what's wrong with this? I think macro expansion is going awry, but I'm not sure why. Do I really have to typedef the map<...> type to keep Fusion happy?
Thx.
#include<string> #include<map>
#include <boost/fusion/adapted/struct/define_struct.hpp> #include <boost/fusion/include/define_struct.hpp>
BOOST_FUSION_DEFINE_STRUCT( (demo), curves, ((std::map<std::string, std::string>), futures) ((std::map<std::string, std::string>), credit_curves) )
int main( ) { return 0; }
make fusion.cpp|9 col 39| error: invalid declarator before ‘)’ token
|| ((std::map<std::string, std::string>), futures)
Kind Regards
Rob.
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