Example code:
    typedef struct base_struct {
    };
    typedef struct base_struct * pointer_struct ;
    static int valid_function(pointer_struct restrict db_conn) {
        return 0;
    }

When an struct is defined as a pointer, using the restrict keyword causes Error messages (cannot find the identifier)
the following for example does not throw the error messages:

    typedef struct base_struct {	
    };
    static int valid_function(base_struct * restrict db_conn) {
        return 0;
    }