> */ public function getNodeTypes() : array { return [Expression::class]; } /** * @param Expression $node * @return Expression[]|null */ public function refactor(Node $node) : ?array { if (!$node->expr instanceof Assign) { return null; } $firstAssign = $node->expr; if (!$firstAssign->expr instanceof Assign) { return null; } $expr = $this->resolveLastAssignExpr($firstAssign); $collectExpressions = $this->collectExpressions($firstAssign, $expr); if ($collectExpressions === []) { return null; } return $collectExpressions; } /** * @return Expression[] */ private function collectExpressions(Assign $assign, Expr $expr) : array { /** @var Expression[] $expressions */ $expressions = []; while ($assign instanceof Assign) { if ($assign->var instanceof ArrayDimFetch) { return []; } $expressions[] = new Expression(new Assign($assign->var, $expr)); // CallLike check need to be after first fill Expression // so use existing variable defined to avoid repetitive call if ($expr instanceof CallLike) { $expr = $assign->var; } if (!$assign->expr instanceof Assign) { break; } /** @var Expr $assign */ $assign = $assign->expr; } return $expressions; } private function resolveLastAssignExpr(Assign $assign) : Expr { if (!$assign->expr instanceof Assign) { return $assign->expr; } return $this->resolveLastAssignExpr($assign->expr); } }