remove optional (to support older xcode)

Author: Hana Dusíková

tests/cnttp.cpp

@@ -1,21 +1,19 @@
 #include <iostream>
 #include <ctre.hpp>
 #include <string_view>
-#include <optional>
 
+struct name { bool has; std::string_view first, family; };
 
-struct name { std::string_view first, family; };
-
-std::optional<name> extract(std::string_view sv) noexcept {
+name extract(std::string_view sv) noexcept {
 	#if __cpp_nontype_template_parameter_class
 	if (auto [re,f,l] = ctre::match<"([A-Za-z]+?),([A-Za-z]+?)">(sv); re) {
 	#else
 	using namespace ctre::literals;
 	if (auto [re,f,l] = "([A-Za-z]+?),([A-Za-z]+?)"_ctre.match(sv); re) {
 	#endif
-		return name{f,l};
+		return name{true, f,l};
 	} else {
-		return std::nullopt;
+		return name{false, std::string_view(), std::string_view()};
 	}
 }