nuf

nuf is a compile time library that has a few cute features.

---

nuf::index

nuf::index is an easy way to pass things at compile time, for instance using the operator[] at compile time. An example implementation of nuf::index is:

template<auto I>
struct index{};

---

nuf::inline_if

nuf::inline_if is just if inline. It allows you to not have to make specializations of classes and much more. An example implementation of nuf::inline_if is as follows:

	template<auto value, auto lam_one, auto lam_two, auto val_one, auto val_two>
	struct inline_if
	{
		constexpr auto operator()()
		{
			if constexpr (lam_one(value))
			{
				return val_one;
			}
			else if constexpr (lam_two(value))
			{
				return val_two;
			}
		}
	};

So as you can see, you pass all the things as non type template parameters, and then call operator() in order to get the value. So an example use case of this would be as follows:

template<auto T>
struct x_or_y
{
  static constexpr auto value = inline_if<T, [](auto x){return T == 42;}, [](auto x){return T != 42;}, 'c', true>{}();
};

int main()
{
  static_assert(x_or_y<56>::value == true); // passes
}