stmtsManipulator = $stmtsManipulator;
$this->betterNodeFinder = $betterNodeFinder;
$this->exprUsedInNodeAnalyzer = $exprUsedInNodeAnalyzer;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Remove unused variable in catch()', [new CodeSample(<<<'CODE_SAMPLE'
final class SomeClass
{
public function run()
{
try {
} catch (Throwable $notUsedThrowable) {
}
}
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
final class SomeClass
{
public function run()
{
try {
} catch (Throwable) {
}
}
}
CODE_SAMPLE
)]);
}
/**
* @return array>
*/
public function getNodeTypes() : array
{
return [StmtsAwareInterface::class];
}
/**
* @param StmtsAwareInterface $node
*/
public function refactor(Node $node) : ?Node
{
if ($node->stmts === null) {
return null;
}
$hasChanged = \false;
foreach ($node->stmts as $key => $stmt) {
if (!$stmt instanceof TryCatch) {
continue;
}
foreach ($stmt->catches as $catch) {
$caughtVar = $catch->var;
if (!$caughtVar instanceof Variable) {
continue;
}
/** @var string $variableName */
$variableName = $this->getName($caughtVar);
$isFoundInCatchStmts = (bool) $this->betterNodeFinder->findFirst($catch->stmts, function (Node $subNode) use($caughtVar) : bool {
return $this->exprUsedInNodeAnalyzer->isUsed($subNode, $caughtVar);
});
if ($isFoundInCatchStmts) {
continue;
}
if ($this->stmtsManipulator->isVariableUsedInNextStmt($node, $key + 1, $variableName)) {
continue;
}
$catch->var = null;
$hasChanged = \true;
}
}
if ($hasChanged) {
return $node;
}
return null;
}
public function provideMinPhpVersion() : int
{
return PhpVersionFeature::NON_CAPTURING_CATCH;
}
}