pub type VBS_BASIC_ENCLAVE_BASIC_CALL_RETURN_FROM_ENCLAVE = Option<unsafe extern "system" fn(returnvalue: usize)>;
enum VBS_BASIC_ENCLAVE_BASIC_CALL_RETURN_FROM_ENCLAVE { None, Some(unsafe extern "system" fn(_: usize)), }
No value.
Some value of type T.
T