+ static bool _choices_are_equal(const choices& a, const choices& b)
+ {
+ if (a.size() != b.size()) {
+ return false;
+ }
+
+ return true;
+
+ return std::equal(a.cbegin(), a.cend(), b.cbegin(),
+ [](const choice& choice_a, const choice& choice_b) {
+ return choice_a.first == choice_b.first &&
+ *choice_a.second == *choice_b.second;
+ });
+ }
+
+ virtual bool _is_equal(const type& base_other) const noexcept override final
+ {
+ const auto& other = static_cast<decltype(*this)&>(base_other);
+
+ return selector_field_location == other.selector_field_location &&
+ _choices_are_equal(_choices, other._choices);
+ }