mirror of https://github.com/rectorphp/rector.git
58 lines
1.7 KiB
PHP
58 lines
1.7 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\Php74\Rector\Assign;
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use PhpParser\Node;
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use PhpParser\Node\Expr\Assign;
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use PhpParser\Node\Expr\AssignOp\Coalesce as AssignCoalesce;
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use PhpParser\Node\Expr\BinaryOp\Coalesce;
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use Rector\Rector\AbstractRector;
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use Rector\ValueObject\PhpVersionFeature;
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use Rector\VersionBonding\Contract\MinPhpVersionInterface;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
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use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
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/**
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* @changelog https://wiki.php.net/rfc/null_coalesce_equal_operator
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* @see \Rector\Tests\Php74\Rector\Assign\NullCoalescingOperatorRector\NullCoalescingOperatorRectorTest
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*/
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final class NullCoalescingOperatorRector extends AbstractRector implements MinPhpVersionInterface
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{
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Use null coalescing operator ??=', [new CodeSample(<<<'CODE_SAMPLE'
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$array = [];
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$array['user_id'] = $array['user_id'] ?? 'value';
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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$array = [];
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$array['user_id'] ??= 'value';
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CODE_SAMPLE
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)]);
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}
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/**
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* @return array<class-string<Node>>
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*/
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public function getNodeTypes() : array
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{
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return [Assign::class];
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}
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/**
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* @param Assign $node
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*/
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public function refactor(Node $node) : ?AssignCoalesce
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{
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if (!$node->expr instanceof Coalesce) {
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return null;
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}
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if (!$this->nodeComparator->areNodesEqual($node->var, $node->expr->left)) {
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return null;
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}
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return new AssignCoalesce($node->var, $node->expr->right);
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}
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public function provideMinPhpVersion() : int
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{
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return PhpVersionFeature::NULL_COALESCE_ASSIGN;
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}
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}
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