mirror of https://github.com/rectorphp/rector.git
98 lines
2.4 KiB
PHP
98 lines
2.4 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\DeadCode\Rector\TryCatch;
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use PhpParser\Node;
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use PhpParser\Node\Stmt;
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use PhpParser\Node\Stmt\Finally_;
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use PhpParser\Node\Stmt\Nop;
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use PhpParser\Node\Stmt\Throw_;
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use PhpParser\Node\Stmt\TryCatch;
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use PhpParser\NodeTraverser;
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use Rector\Rector\AbstractRector;
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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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* @see \Rector\Tests\DeadCode\Rector\TryCatch\RemoveDeadTryCatchRector\RemoveDeadTryCatchRectorTest
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*/
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final class RemoveDeadTryCatchRector extends AbstractRector
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{
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public function getRuleDefinition() : RuleDefinition
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{
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return new RuleDefinition('Remove dead try/catch', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run()
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{
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try {
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// some code
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}
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catch (Throwable $throwable) {
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throw $throwable;
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}
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run()
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{
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}
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}
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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 [TryCatch::class];
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}
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/**
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* @param TryCatch $node
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* @return Stmt[]|null|TryCatch|int
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*/
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public function refactor(Node $node)
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{
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$isEmptyFinallyStmts = !$node->finally instanceof Finally_ || $this->isEmpty($node->finally->stmts);
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// not empty stmts on finally always executed
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if (!$isEmptyFinallyStmts) {
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return null;
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}
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if ($this->isEmpty($node->stmts)) {
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return NodeTraverser::REMOVE_NODE;
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}
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if (\count($node->catches) !== 1) {
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return null;
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}
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$onlyCatch = $node->catches[0];
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if ($this->isEmpty($onlyCatch->stmts)) {
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return null;
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}
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$onlyCatchStmt = $onlyCatch->stmts[0];
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if (!$onlyCatchStmt instanceof Throw_) {
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return null;
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}
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if (!$this->nodeComparator->areNodesEqual($onlyCatch->var, $onlyCatchStmt->expr)) {
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return null;
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}
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return $node->stmts;
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}
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/**
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* @param Stmt[] $stmts
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*/
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private function isEmpty(array $stmts) : bool
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{
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if ($stmts === []) {
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return \true;
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}
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if (\count($stmts) > 1) {
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return \false;
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}
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return $stmts[0] instanceof Nop;
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}
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}
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