%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
declare (strict_types=1);
namespace Rector\DeadCode\Rector\For_;
use PhpParser\Node;
use PhpParser\Node\Scalar\LNumber;
use PhpParser\Node\Stmt;
use PhpParser\Node\Stmt\Continue_;
use PhpParser\Node\Stmt\Do_;
use PhpParser\Node\Stmt\For_;
use PhpParser\Node\Stmt\Foreach_;
use PhpParser\Node\Stmt\While_;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
* @see \Rector\Tests\DeadCode\Rector\For_\RemoveDeadContinueRector\RemoveDeadContinueRectorTest
*/
final class RemoveDeadContinueRector extends AbstractRector
{
public function getRuleDefinition() : RuleDefinition
{
return new RuleDefinition('Remove useless continue at the end of loops', [new CodeSample(<<<'CODE_SAMPLE'
while ($i < 10) {
++$i;
continue;
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
while ($i < 10) {
++$i;
}
CODE_SAMPLE
)]);
}
/**
* @return array<class-string<Node>>
*/
public function getNodeTypes() : array
{
return [Do_::class, For_::class, Foreach_::class, While_::class];
}
/**
* @param Do_|For_|Foreach_|While_ $node
*/
public function refactor(Node $node) : ?Node
{
$modified = \false;
while ($this->canRemoveLastStatement($node->stmts)) {
\array_pop($node->stmts);
$modified = \true;
}
return $modified ? $node : null;
}
/**
* @param Stmt[] $stmts
*/
private function canRemoveLastStatement(array $stmts) : bool
{
if ($stmts === []) {
return \false;
}
\end($stmts);
$lastKey = \key($stmts);
$lastStmt = $stmts[$lastKey];
return $this->isRemovable($lastStmt);
}
private function isRemovable(Stmt $stmt) : bool
{
if (!$stmt instanceof Continue_) {
return \false;
}
if ($stmt->num instanceof LNumber) {
return $stmt->num->value < 2;
}
return \true;
}
}
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