Method compare

src/main/java/groovy/lang/Tuple.java:168–181

(T t1, T t2)

    }

    @SuppressWarnings("unchecked")
    private static <T> int compare(T t1, T t2) {
        return t1 == null && t2 == null
                ? 0
                : t1 == null
                ? 1
                : t2 == null
                ? -1
                : t1 instanceof Comparable
                ? ((Comparable<T>) t1).compareTo(t2)
                : DefaultTypeTransformation.compareEqual(t1, t2)
                ? 0
                : 1;
    }

    /**
     * Construct a tuple of degree 0.