Re: [Boost-users] Boost.Lambda, boost::lambda::detail::return_type_deduction_failure?

I have managed to fix this by using ret<>() to specify the type that I want my lambda function to return. Now I have: for_each(vect.begin(), vect.end(), var(str) += ret<string>(_1+constant(", ")) ); And it compiles and works fine.