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StaticClosureRector.php
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StaticClosureRector.php
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<?php
declare (strict_types=1);
namespace Rector\CodingStyle\Rector\Closure;
use PhpParser\Node;
use PhpParser\Node\Expr\Closure;
use Rector\CodingStyle\Guard\StaticGuard;
use Rector\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @see \Rector\Tests\CodingStyle\Rector\Closure\StaticClosureRector\StaticClosureRectorTest
*/
final class StaticClosureRector extends AbstractRector
{
/**
* @readonly
* @var \Rector\CodingStyle\Guard\StaticGuard
*/
private $staticGuard;
public function __construct(StaticGuard $staticGuard)
{
$this->staticGuard = $staticGuard;
}
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Changes Closure to be static when possible', [new CodeSample(<<<'CODE_SAMPLE'
function () {
if (rand(0, 1)) {
return 1;
}
return 2;
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
static function () {
if (rand(0, 1)) {
return 1;
}
return 2;
}
CODE_SAMPLE
)]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [Closure::class];
}
/**
* @param Closure $node
*/
public function refactor(Node $node) : ?Node
{
if (!$this->staticGuard->isLegal($node)) {
return null;
}
$node->static = \true;
return $node;
}
}