Compute functions on a grid of parameters

General Usage
13

This is how you could put that into a generated function and use it

@generated function many(input, ranges::NTuple{N,T} ) where {N,T}
    quote
        @nextract $N r ranges
        @nextract $N f input
        $(Expr(:(=), Symbol(:fval_,N+1) , 3))
        @nloops $N i n->1:r_n d -> fval_d = f_d(fval_{d+1}, i_d) begin
            @nexprs $N k->(println(fval_k))
        end
    end
end
in = (+,-,atan,/) # Some two-argument functions
many(in, (3,3,3,3))

Note that this does not actually calculate anything interesting at the moment, just a demo.