C++ closures are a bit weird in that you have to specify how the captured data needs to be captured (either by reference or by copy). How the data is handled al

C++ closures are a bit weird in that you have to specify how the captured data needs to be captured (either by reference or by copy). How the data is handled also depends on the implementation of std::function (if you decide to wrap your lambdas in that). It's possible that the implementation for std::function actually makes a reference-counted heap allocation every time a new closure is created. Anyway, the result is a lot of complexity that would be impossible to shoe-horn into C.