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functionDepth = 0; return null; } /** * @return int|Node|null Replacement node (or special return value) */ public function enterNode(Node $node) { if ($node instanceof FunctionLike) { $this->functionDepth++; return null; } // node is inside function context if ($this->functionDepth !== 0) { return null; } // It causes fatal error. if ($node instanceof Yield_) { $msg = 'The "yield" expression can only be used inside a function'; throw new FatalErrorException($msg, 0, \E_ERROR, null, $node->getStartLine()); } return null; } /** * @param \PhpParser\Node $node * * @return int|Node|Node[]|null Replacement node (or special return value) */ public function leaveNode(Node $node) { if ($node instanceof FunctionLike) { $this->functionDepth--; } return null; } }