Check for missing standard library definitions in Yerbacon.hpp

src/headers/Yerbacon.hpp

@@ -10,6 +10,14 @@
 #error "A valid std::threads implementation is required"
 #endif
 
+#include <version>
+#if not defined(__cpp_lib_concepts) || not defined(__cpp_lib_integer_comparison_functions)
+#error "The current standard library is incomplete"
+#endif
+#ifndef __cpp_using_enum
+#error "The "using enum" syntax is not supported by this compiler"
+#endif
+
 #include <exception>
 #include <string_view>
 #include <string>