mirror of https://github.com/rectorphp/rector.git
56 lines
1.6 KiB
PHP
56 lines
1.6 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\Php70\Rector\List_;
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use PhpParser\Node;
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use PhpParser\Node\Expr\ArrayItem;
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use PhpParser\Node\Expr\List_;
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use PhpParser\Node\Expr\Variable;
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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 http://php.net/manual/en/migration70.incompatible.php#migration70.incompatible.variable-handling.list
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* @see \Rector\Tests\Php70\Rector\List_\EmptyListRector\EmptyListRectorTest
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*/
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final class EmptyListRector 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('list() cannot be empty', [new CodeSample(<<<'CODE_SAMPLE'
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'list() = $values;'
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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'list($unusedGenerated) = $values;'
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CODE_SAMPLE
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)]);
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}
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public function provideMinPhpVersion() : int
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{
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return PhpVersionFeature::NO_EMPTY_LIST;
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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 [List_::class];
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}
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/**
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* @param List_ $node
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*/
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public function refactor(Node $node) : ?Node
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{
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foreach ($node->items as $item) {
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if ($item instanceof ArrayItem) {
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return null;
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}
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}
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$node->items[0] = new ArrayItem(new Variable('unusedGenerated'));
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return $node;
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}
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}
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