mirror of https://github.com/rectorphp/rector.git
94 lines
2.6 KiB
PHP
94 lines
2.6 KiB
PHP
<?php
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declare (strict_types=1);
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namespace Rector\CodingStyle\Rector\PostInc;
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use PhpParser\Node;
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use PhpParser\Node\Expr\PostDec;
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use PhpParser\Node\Expr\PostInc;
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use PhpParser\Node\Expr\PreDec;
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use PhpParser\Node\Expr\PreInc;
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use PhpParser\Node\Stmt\Expression;
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use PhpParser\Node\Stmt\For_;
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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\CodingStyle\Rector\PostInc\PostIncDecToPreIncDecRector\PostIncDecToPreIncDecRectorTest
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*/
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final class PostIncDecToPreIncDecRector 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('Use ++$value or --$value instead of `$value++` or `$value--`', [new CodeSample(<<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run($value = 1)
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{
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$value++; echo $value;
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$value--; echo $value;
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}
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}
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CODE_SAMPLE
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, <<<'CODE_SAMPLE'
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class SomeClass
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{
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public function run($value = 1)
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{
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++$value; echo $value;
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--$value; echo $value;
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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 [For_::class, Expression::class];
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}
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/**
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* @param For_|Expression $node
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*/
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public function refactor(Node $node) : ?Node
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{
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if ($node instanceof Expression) {
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return $this->refactorExpression($node);
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}
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return $this->refactorFor($node);
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}
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private function refactorFor(For_ $for) : ?\PhpParser\Node\Stmt\For_
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{
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if (\count($for->loop) !== 1) {
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return null;
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}
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$singleLoopExpr = $for->loop[0];
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if (!$singleLoopExpr instanceof PostInc && !$singleLoopExpr instanceof PostDec) {
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return null;
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}
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$for->loop = [$this->processPrePost($singleLoopExpr)];
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return $for;
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}
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/**
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* @param \PhpParser\Node\Expr\PostInc|\PhpParser\Node\Expr\PostDec $node
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* @return \PhpParser\Node\Expr\PreInc|\PhpParser\Node\Expr\PreDec
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*/
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private function processPrePost($node)
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{
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if ($node instanceof PostInc) {
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return new PreInc($node->var);
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}
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return new PreDec($node->var);
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}
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private function refactorExpression(Expression $expression) : ?Expression
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{
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if ($expression->expr instanceof PostInc || $expression->expr instanceof PostDec) {
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$expression->expr = $this->processPrePost($expression->expr);
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return $expression;
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}
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return null;
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}
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}
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