Add constexpr loop

util.hpp

@@ -101,4 +101,10 @@ inline constexpr auto make_offset_index_sequence()
 	return make_offset_integer_sequence<size_t, Offset, N>();
 }
 
+template <class Fn, size_t... Ints>
+void for_constexpr(Fn &&func, index_sequence<Ints...>)
+{
+	(func(type::integral_constant<size_t, Ints>{}), ...);
+}
+
 } // namespace util