On 6/20/2012 1:37 PM, Daniel Larimer wrote:
I recently attempted to update to gcc 4.7 and code that compiled with 4.5.3 broke.
It appears that boost::fusion expects boost::fusion::random_access_traversal_tag to implicitly cast to mpl::bool_<false>.
Switching the 3rd argument from mpl::bool_<false> to an extra template arg (that was ignored), seems to fix the compilation errors.
Compiled with std=c++11
Do you have a minimal test case?
#include <boost/fusion/container/vector.hpp> #include <boost/fusion/algorithm.hpp> #include <boost/fusion/include/make_vector.hpp>
struct visitor { template<typename T> void operator()( T t )const{} };
int main() { visitor v; boost::fusion::for_each( boost::fusion::make_vector(5,6.6), v ); return 0; }
This compiles fine for me with --std=c++11 with GCC 4.7.0 (released version) on MinGW. Regards, Nate