Type parametrised test case: support for non-type template parameters

[tzakharko]

Right now, TEMPLATE_TEST_CASE and friends only seem to support type template parameters. Would be nice if we can also do something like this:

template<std::size_t,typename> struct Type;

TEMPLATE_TEST_CASE("", "", 1, 2, 3, 4) {
   Type<TestType, float> test;
}

or even

TEMPLATE_TEST_CASE("", "", (1, int), (2, float), (3, int), (4, float)) {
   Type<TestType> test;
}

P.S. Right now I am circumventing it like this:

TEMPLATE_TEST_CASE("", "", (Type<1, float), (Type<2, float), (Type<3, float), (Type<4, float)) {
   TestType test;
}

which does work

[JoeyGrajciar]

@tzakharko actually we thought about NTTP support for TEMPLATE_PRODUCT_TEST_CASE.
We decided that it would not be so trivial since the whole generation of the final TestType depends on the template signature for that type.
Either way I think that I will take a deeper look on this feature.