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<?php
declare (strict_types=1);
namespace Rector\DeadCode\NodeAnalyzer;
use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Expr\Include_;
use PhpParser\Node\Expr\Variable;
use Rector\Core\Contract\PhpParser\NodePrinterInterface;
use Rector\Core\NodeAnalyzer\CompactFuncCallAnalyzer;
use Rector\Core\PhpParser\Comparing\NodeComparator;
final class ExprUsedInNodeAnalyzer
{
/**
* @readonly
* @var \Rector\Core\PhpParser\Comparing\NodeComparator
*/
private $nodeComparator;
/**
* @readonly
* @var \Rector\DeadCode\NodeAnalyzer\UsedVariableNameAnalyzer
*/
private $usedVariableNameAnalyzer;
/**
* @readonly
* @var \Rector\Core\NodeAnalyzer\CompactFuncCallAnalyzer
*/
private $compactFuncCallAnalyzer;
/**
* @readonly
* @var \Rector\Core\Contract\PhpParser\NodePrinterInterface
*/
private $nodePrinter;
public function __construct(NodeComparator $nodeComparator, \Rector\DeadCode\NodeAnalyzer\UsedVariableNameAnalyzer $usedVariableNameAnalyzer, CompactFuncCallAnalyzer $compactFuncCallAnalyzer, NodePrinterInterface $nodePrinter)
{
$this->nodeComparator = $nodeComparator;
$this->usedVariableNameAnalyzer = $usedVariableNameAnalyzer;
$this->compactFuncCallAnalyzer = $compactFuncCallAnalyzer;
$this->nodePrinter = $nodePrinter;
}
public function isUsed(Node $node, Expr $expr) : bool
{
if ($node instanceof Include_) {
return \true;
}
// variable as variable variable need mark as used
if ($node instanceof Variable && $expr instanceof Variable) {
$print = $this->nodePrinter->print($node);
if (\strncmp($print, '${$', \strlen('${$')) === 0) {
return \true;
}
}
if ($node instanceof FuncCall && $expr instanceof Variable) {
return $this->compactFuncCallAnalyzer->isInCompact($node, $expr);
}
if ($expr instanceof Variable) {
return $this->usedVariableNameAnalyzer->isVariableNamed($node, $expr);
}
return $this->nodeComparator->areNodesEqual($node, $expr);
}
}