generateIntervals example

    public static function haveIntersections(ConstraintInterface $a, ConstraintInterface $b)
    {
        if ($a instanceof MatchAllConstraint || $b instanceof MatchAllConstraint) {
            return true;
        }

        if ($a instanceof MatchNoneConstraint || $b instanceof MatchNoneConstraint) {
            return false;
        }

        $intersectionIntervals = self::generateIntervals(new MultiConstraint(array($a, $b), true), true);

        return \count($intersectionIntervals['numeric']) > 0 || $intersectionIntervals['branches']['exclude'] || \count($intersectionIntervals['branches']['names']) > 0;
    }

    /** * Attempts to optimize a MultiConstraint * * When merging MultiConstraints together they can get very large, this will * compact it by looking at the real intervals covered by all the constraints * and then creates a new constraint containing only the smallest amount of rules * to match the same intervals. * * @return ConstraintInterface */