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ariadna |
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<?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\ArrayType;
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use PHPStan\Type\Constant\ConstantArrayType;
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use PHPStan\Type\Constant\ConstantIntegerType;
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use PHPStan\Type\IntersectionType;
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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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use PHPStan\Type\TypeTraverser;
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use PHPStan\Type\UnionType;
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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);
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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);
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}
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return TypeCombinator::union(...$internalFlagsTypes);
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}
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static public function removeNullFromMatches(Type $matchesType): Type
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{
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return TypeTraverser::map($matchesType, static function (Type $type, callable $traverse): Type {
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if ($type instanceof UnionType || $type instanceof IntersectionType) {
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return $traverse($type);
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}
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if ($type instanceof ConstantArrayType) {
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return new ConstantArrayType(
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$type->getKeyTypes(),
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array_map(static function (Type $valueType) use ($traverse): Type {
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return $traverse($valueType);
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}, $type->getValueTypes()),
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$type->getNextAutoIndexes(),
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[],
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$type->isList()
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);
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}
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if ($type instanceof ArrayType) {
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return new ArrayType($type->getKeyType(), $traverse($type->getItemType()));
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}
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return TypeCombinator::removeNull($type);
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});
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}
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}
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