Lines Matching refs:null

49      * @var int|null
62         if ($empty === null) {
73      * Return {@see PredictionContext::empty()} if `outerContext` is empty or null.
77         if ($outerContext === null) {
83         if ($outerContext->getParent() === null || $outerContext === RuleContext::emptyContext()) {
115         if ($this->cachedHashCode === null) {
199         if ($mergeCache !== null) {
202             if ($previous !== null) {
208             if ($previous !== null) {
215         if ($rootMerge !== null) {
216             if ($mergeCache !== null) {
224             if ($a->parent === null || $b->parent === null) {
225                 throw new \RuntimeException('Unexpected null parents.');
246             if ($mergeCache !== null) {
253             $singleParent = null;
255             if ($a === $b || ($a->parent !== null && $a->parent === $b->parent)) {
262             if ($singleParent !== null) {
275                 if ($mergeCache !== null) {
297             if ($mergeCache !== null) {
335      * a special value (and null parent).
362                 $parents = [$b->parent, null];
370                 $parents = [$a->parent, null];
376         return null;
409         if ($mergeCache !== null) {
412             if ($previous !== null) {
418             if ($previous !== null) {
441                 $bothDollars = $payload === self::EMPTY_RETURN_STATE && $a_parent === null && $b_parent === null;
442                 $ax_ax = ($a_parent !== null && $b_parent !== null && $a_parent->equals($b_parent));// ax+ax
450                     if ($a_parent === null || $b_parent === null) {
451                         throw new \RuntimeException('Unexpected null parents.');
499                 if ($mergeCache !== null) {
517             if ($mergeCache !== null) {
525             if ($mergeCache !== null) {
532         if ($mergeCache !== null) {
558      * @param array<PredictionContext|null> $visited
569         $existing = $visited[\spl_object_id($context)] ?? null;
571         if ($existing !== null) {
577         if ($existing !== null) {
588             if ($parentContext === null) {
594             if ($changed || ($parentContext !== null && !$parent->equals($parentContext))) {
617         $updated = null;
640         $this->cachedHashCode = null;