38 lines
1.2 KiB
PHP
38 lines
1.2 KiB
PHP
<?php declare(strict_types=1);
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namespace Composer\Pcre\PHPStan;
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use PHPStan\Analyser\Scope;
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use PHPStan\Type\Constant\ConstantIntegerType;
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use PHPStan\Type\TypeCombinator;
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use PHPStan\Type\Type;
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use PhpParser\Node\Arg;
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use PHPStan\Type\Php\RegexArrayShapeMatcher;
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final class PregMatchFlags
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{
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static public function getType(?Arg $flagsArg, Scope $scope): ?Type
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{
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if ($flagsArg === null) {
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return new ConstantIntegerType(PREG_UNMATCHED_AS_NULL | RegexArrayShapeMatcher::PREG_UNMATCHED_AS_NULL_ON_72_73);
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}
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$flagsType = $scope->getType($flagsArg->value);
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$constantScalars = $flagsType->getConstantScalarValues();
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if ($constantScalars === []) {
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return null;
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}
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$internalFlagsTypes = [];
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foreach ($flagsType->getConstantScalarValues() as $constantScalarValue) {
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if (!is_int($constantScalarValue)) {
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return null;
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}
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$internalFlagsTypes[] = new ConstantIntegerType($constantScalarValue | PREG_UNMATCHED_AS_NULL | RegexArrayShapeMatcher::PREG_UNMATCHED_AS_NULL_ON_72_73);
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}
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return TypeCombinator::union(...$internalFlagsTypes);
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}
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}
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