Better version string

cmake/VersionString.cmake

@@ -343,10 +343,11 @@ class version_info : public version_info_base
   public:
 	using implementation_type = T;
 
-  protected:
-	version_info()
+	struct register_object
+	{
+		register_object()
 		{
-		auto &s_head = head();
+			auto &s_head = version_info_base::head();
 			static instance s_next{
 				implementation_type::name(),
 				implementation_type::version(),
@@ -356,8 +357,16 @@ class version_info : public version_info_base
 				s_head };
 			s_head = &s_next;
 		}
+	};
+
+	template<register_object&> struct referrence_object;
+
+	static register_object s_registered_object;
+	static referrence_object<s_registered_object> s_referrenced_object;
 };
 
+template<typename T> typename version_info<T>::register_object version_info<T>::s_registered_object;
+
 inline void write_version_string(std::ostream &os, bool verbose)
 {
 	version_info_base::write(os, verbose);
@@ -373,7 +382,7 @@ class version_info_@IDENT_PREFIX@impl : public version_info<version_info_@IDENT_
 	static constexpr int build_number() { return k@VAR_PREFIX@BuildNumber; }
 	static constexpr const char *git_tag() { return k@VAR_PREFIX@RevisionGitTag; }
 	static constexpr const char *revision_date() { return k@VAR_PREFIX@RevisionDate; }
-} s_@IDENT_PREFIX@instance;
+};
 ]])
 	configure_file("${VERSION_STRING_DATA}/${file_name}.in" "${dir}/${file_name}" @ONLY)
 endfunction()

include/cif++/utilities.hpp

@@ -56,7 +56,6 @@ extern CIFPP_EXPORT int VERBOSE;
 
 // the git 'build' number
 std::string get_version_nr();
-// std::string get_version_date();
 
 // --------------------------------------------------------------------
 //	Code helping with terminal i/o