This export is a common source of confusion for users of ForwardDiff, e.g. https://github.com/JuliaDiff/ForwardDiff.jl/issues/70. I don't think Calculus has a claim to extend Base's method any more so than ForwardDiff, so the least confusing solution is for neither to extend the method.
This export is a common source of confusion for users of ForwardDiff, e.g. https://github.com/JuliaDiff/ForwardDiff.jl/issues/70. I don't think Calculus has a claim to extend Base's method any more so than ForwardDiff, so the least confusing solution is for neither to extend the method.
CC @jrevels