try #define BOOST_VARIANT_NO_FULL_RECURSIVE_VARIANT_SUPPORT MSVC++ 2010 and gcc maybe need this. ------------------------------ Message: 4 Date: Thu, 17 Nov 2011 11:10:27 +0100 From: "Bodmer Marc" To: Subject: [Boost-users] recursive_variant map recursion / incomplete type error Message-ID: <0456E5B751F6DB4A83688EED49C9CAF70E101094@CHNIS191.bystronic.metal.firm> Content-Type: text/plain; charset="utf-8" Hi I try to use boost::recursive_variant with a recursive std::map. There are several projects and examples on the internet using boost::recursive_variant exactly like I do and it seems to work there. But somehow I can not make it compile in my environment. I am using gcc 4.6.1 and boost 1.46.1. I've stripped my code down to this: ------------------------------------------------------------- #include #include <map> typedef boost::make_recursive_variant< int, std::map

::type element;

int main () { element i = 42; }