[Boost-users] Lambda and Fusion: result_of problems

Hi! After recently discovering the the Fusion library I've been playing around with it for a bit. It's pretty awesome. There is however one thing I haven't been able to figure out. How do you use it with lambda expressions? E.g. t1 & t1 are tuples of doubles fusion::transform(t1, t2, std::minus<double>()) // Works fine fusion::transform(t1, t2, lambda::_1 - lambda::_2) // Doesn't work I'm not sure I understand the problem correctly, but it seems to be related to boost::result_of. For some reason the lambda functor doesn't seem to define it's return type (F::template result<FArgs>)? Am I doing something wrong or is this a known awkwardness? If so, are there any convenient workarounds? Best Regards, Anders Sundman