betterStandardPrinter = $betterStandardPrinter;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('list() assigns variables in reverse order - relevant in array assign', [new CodeSample('list($a[], $a[]) = [1, 2];', 'list($a[], $a[]) = array_reverse([1, 2]);')]);
}
/**
* @return array>
*/
public function getNodeTypes() : array
{
return [Assign::class];
}
/**
* @param Assign $node
*/
public function refactor(Node $node) : ?Node
{
if ($this->shouldSkipAssign($node)) {
return null;
}
/** @var List_ $list */
$list = $node->var;
$printedVariables = [];
foreach ($list->items as $arrayItem) {
if (!$arrayItem instanceof ArrayItem) {
continue;
}
if ($arrayItem->value instanceof ArrayDimFetch && !$arrayItem->value->dim instanceof Expr) {
$printedVariables[] = $this->betterStandardPrinter->print($arrayItem->value->var);
} else {
return null;
}
}
// relevant only in 1 variable type
$uniqueVariables = \array_unique($printedVariables);
if (\count($uniqueVariables) !== 1) {
return null;
}
// wrap with array_reverse, to reflect reverse assign order in left
$node->expr = $this->nodeFactory->createFuncCall('array_reverse', [$node->expr]);
return $node;
}
public function provideMinPhpVersion() : int
{
return PhpVersionFeature::LIST_SWAP_ORDER;
}
private function shouldSkipAssign(Assign $assign) : bool
{
if (!$assign->var instanceof List_) {
return \true;
}
// already converted
return $assign->expr instanceof FuncCall && $this->isName($assign->expr, 'array_reverse');
}
}