Visitor.php
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Visitor.php
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	<?php
	/**
	* @private
	*/
	class Less_Visitor {

	protected $methods = [];
	protected $_visitFnCache = [];

	public function __construct() {
	$this->_visitFnCache = get_class_methods( get_class( $this ) );
	$this->_visitFnCache = array_flip( $this->_visitFnCache );
	}

	public function visitObj( $node ) {
	if ( !$node \|\| !is_object( $node ) ) {
	return $node;
	}
	$funcName = 'visit' . str_replace( [ 'Less_Tree_', '_' ], '', get_class( $node ) );
	if ( isset( $this->_visitFnCache[$funcName] ) ) {
	$visitDeeper = true;
	$newNode = $this->$funcName( $node, $visitDeeper );
	if ( $this instanceof Less_VisitorReplacing ) {
	$node = $newNode;
	}

	if ( $visitDeeper && is_object( $node ) ) {
	$node->accept( $this );
	}

	$funcName .= 'Out';
	if ( isset( $this->_visitFnCache[$funcName] ) ) {
	$this->$funcName( $node );
	}

	} else {
	$node->accept( $this );
	}

	return $node;
	}

	public function visitArray( &$nodes ) {
	// NOTE: The use of by-ref in a normal (non-replacing) Visitor may be surprising,
	// but upstream relies on this for Less_ImportVisitor, which modifies values of
	// `$importParent->rules` yet is not a replacing visitor.
	foreach ( $nodes as &$node ) {
	$this->visitObj( $node );
	}
	return $nodes;
	}
	}