I have a non-type parameter template class in some header file:
template <int N1, int N2>
class A;
I want to explicitly instantiate some classes in ranges N1 = [0...K1], N2 = [0...K2], but this can result in many permutations:
template A<0,0>;
template A<0,1>;
template A<1,0>;
//...
Given a proper arrangement with a source file and header, will this compile to a static library, and is it possible to generalize the permutations?
The following should instantiate all templates:
#include <utility>
template<int N1, int N2>
class A;
static constexpr int K1 = 5;
static constexpr int K2 = 7;
template<int... Ns>
void helper(A<Ns % K1, Ns / K1>...);
template<int... Ns>
auto helper2(std::integer_sequence<int, Ns...>) -> decltype(&helper<Ns...>);
template<int N>
auto helper3() -> decltype(helper2(std::make_integer_sequence<int, N>()));
using foo = decltype(helper3<K1>());
Note that this will only go to K1-1 and K2-1, so if you want the closed intervals you should add one.
I do not see a reason why this should not work as a statically linked library but I did not test it.
