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<?php
interface PHPParser_NodeVisitor
{
/**
* Called once before traversal.
*
* Return value semantics:
* * null: $nodes stays as-is
* * otherwise: $nodes is set to the return value
*
* @param PHPParser_Node[] $nodes Array of nodes
*
* @return null|PHPParser_Node[] Array of nodes
*/
public function beforeTraverse(array $nodes);
/**
* Called when entering a node.
*
* Return value semantics:
* * null: $node stays as-is
* * otherwise: $node is set to the return value
*
* @param PHPParser_Node $node Node
*
* @return null|PHPParser_Node Node
*/
public function enterNode(PHPParser_Node $node);
/**
* Called when leaving a node.
*
* Return value semantics:
* * null: $node stays as-is
* * false: $node is removed from the parent array
* * array: The return value is merged into the parent array (at the position of the $node)
* * otherwise: $node is set to the return value
*
* @param PHPParser_Node $node Node
*
* @return null|PHPParser_Node|false|PHPParser_Node[] Node
*/
public function leaveNode(PHPParser_Node $node);
/**
* Called once after traversal.
*
* Return value semantics:
* * null: $nodes stays as-is
* * otherwise: $nodes is set to the return value
*
* @param PHPParser_Node[] $nodes Array of nodes
*
* @return null|PHPParser_Node[] Array of nodes
*/
public function afterTraverse(array $nodes);
}