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< ? php
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declare ( strict_types = 1 );
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namespace Rector\CodingStyle\Rector\Assign ;
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use PhpParser\Node ;
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use PhpParser\Node\Expr ;
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use PhpParser\Node\Expr\ArrayDimFetch ;
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use PhpParser\Node\Expr\Assign ;
use PhpParser\Node\Expr\CallLike ;
use PhpParser\Node\Stmt\Expression ;
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use Rector\Rector\AbstractRector ;
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use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample ;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition ;
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/**
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* @ see \Rector\Tests\CodingStyle\Rector\Assign\SplitDoubleAssignRector\SplitDoubleAssignRectorTest
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*/
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final class SplitDoubleAssignRector 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 ( 'Split multiple inline assigns to each own lines default value, to prevent undefined array issues' , [ new CodeSample ( <<< 'CODE_SAMPLE'
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class SomeClass
{
public function run ()
{
$one = $two = 1 ;
}
}
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CODE_SAMPLE
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, <<< 'CODE_SAMPLE'
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class SomeClass
{
public function run ()
{
$one = 1 ;
$two = 1 ;
}
}
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CODE_SAMPLE
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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 [ Expression :: class ];
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}
/**
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* @ param Expression $node
* @ return Expression [] | null
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*/
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public function refactor ( Node $node ) : ? array
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{
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if ( ! $node -> expr instanceof Assign ) {
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return null ;
}
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$firstAssign = $node -> expr ;
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if ( ! $firstAssign -> expr instanceof Assign ) {
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return null ;
}
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$lastAssignValue = $this -> resolveLastAssignExpr ( $firstAssign );
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$collectExpressions = $this -> collectExpressions ( $firstAssign , $lastAssignValue );
if ( $collectExpressions === []) {
return null ;
}
return $collectExpressions ;
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}
/**
* @ return Expression []
*/
private function collectExpressions ( Assign $assign , Expr $expr ) : array
{
/** @var Expression[] $expressions */
$expressions = [];
while ( $assign instanceof Assign ) {
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if ( $assign -> var instanceof ArrayDimFetch ) {
return [];
}
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$expressions [] = new Expression ( new Assign ( $assign -> var , $expr ));
// CallLike check need to be after first fill Expression
// so use existing variable defined to avoid repetitive call
if ( $expr instanceof CallLike ) {
$expr = $assign -> var ;
}
if ( ! $assign -> expr instanceof Assign ) {
break ;
}
/** @var Expr $assign */
$assign = $assign -> expr ;
}
return $expressions ;
}
private function resolveLastAssignExpr ( Assign $assign ) : Expr
{
if ( ! $assign -> expr instanceof Assign ) {
return $assign -> expr ;
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}
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return $this -> resolveLastAssignExpr ( $assign -> expr );
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}
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}