plain parsing of pattern is working

Author: Hana Dusíková

include/ctre/return_type.hpp

@@ -55,9 +55,7 @@ template <size_t Id, typename Name = void> struct captured_content {
 			return std::basic_string_view{_begin, static_cast<size_t>(std::distance(_begin, _end))};
 		}
 
-		using string_view_type = decltype(std::basic_string_view{_begin, static_cast<size_t>(std::distance(_begin, _end))});
-		
-		constexpr operator string_view_type() const noexcept {
+		constexpr operator std::string_view() const noexcept {
 			return to_view();
 		}
 
@@ -137,8 +135,6 @@ template <> struct captures<> {
 };
 
 template <typename Iterator, typename... Captures> struct regex_results {
-	using char_type = std::remove_reference_t<std::remove_const_t<decltype(*std::declval<Iterator>())>>;
-
 	captures<captured_content<0>::template storage<Iterator>, typename Captures::template storage<Iterator>...> _captures;
 
 	constexpr CTRE_FORCE_INLINE regex_results() noexcept { }
@@ -170,8 +166,8 @@ template <typename Iterator, typename... Captures> struct regex_results {
 
 	using string_view_type = decltype(_captures.template select<0>().to_view());
 
-	constexpr operator string_view_type() const noexcept {
-		return _captures.template select<0>().to_view();
+	constexpr operator std::string_view() const noexcept {
+		return to_view();
 	}
 	constexpr auto to_view() const noexcept {
 		return _captures.template select<0>().to_view();

tests/msvc.cpp

@@ -4,5 +4,8 @@
 using namespace std::string_view_literals;
 
 static inline constexpr auto pattern1 = ctll::basic_fixed_string{"^[\\x30-\\x39]+?$"};
+static inline constexpr auto pattern2 = ctll::basic_fixed_string{""};
+
 
 static_assert(ctre::re<pattern1>().match("123456789"sv));
+static_assert(ctre::re<pattern2>().match(""sv));