Corrected compilation with Clang16 and GCC 12

Author: gracicot

include/kangaru/detail/recursive_source.hpp

@@ -345,6 +345,10 @@ namespace kangaru {
 		}
 	};
 
+	// This deduction guide is required for clang 16 to work
+	template<rebindable_source Source>
+	with_recursion(Source const& source) -> with_recursion<Source>;
+	
 	template<forwarded_source Source>
 	inline constexpr auto make_source_with_recursion(Source&& source) {
 		return with_recursion<std::decay_t<Source>>{KANGARU5_FWD(source)};

include/kangaru/detail/source_helper.hpp

@@ -3,6 +3,7 @@
 
 #include "source.hpp"
 #include "source_reference_wrapper.hpp"
+#include "utility.hpp"
 
 #include <type_traits>
 #include <concepts>
@@ -51,9 +52,10 @@ namespace kangaru {
 	concept transparent_rebindable_wrapping_source =
 		    wrapping_source<Source>
 		and requires(Source source) {
-			typename detail::source_helper::rebind_wrapper<std::remove_cv_t<Source>>::template ttype<
+			// Here we need to used ttype_t instead of directly using ::ttype<...>::type because GCC 12 has issues with it.
+			typename detail::utility::ttype_t<detail::source_helper::rebind_wrapper<std::remove_cv_t<Source>>,
 				std::decay_t<decltype(source.source)>
-			>::type;
+			>;
 		};
 
 	template<typename Source>

include/kangaru/detail/utility.hpp

@@ -81,6 +81,9 @@ namespace kangaru::detail::utility {
 
 	template<typename T>
 	using type_identity = T;
+	
+	template<typename TType, typename... Ts>
+	using ttype_t = typename TType::template ttype<Ts...>::type;
 }
 
 #include "undef.hpp"