define typemin and typemax?

[sglyon]

When using maximum(::Array, ::Int) with ForwardDiff, I get nasty errors saying Base.typemin is not defined.

As a stop-gap I just define it like this:

function Base.typemin(::Type{ForwardDiff.Dual{T,V,N}}) where {T,V,N}
    ForwardDiff.Dual{T,V,N}(typemin(V))
end

in my code, but that function probably really belongs here.

I would open a PR, but I'm not sure exactly where in dual.jl it belongs (e.g. which section of that file, so things stay organized) as well as whether or not it should be @inlined. Any suggestions?

[matbesancon]

bump on this? I just hit the same error