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InitializerExprTypeResolver.php
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InitializerExprTypeResolver.php
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<?php declare(strict_types = 1);
namespace PHPStan\Reflection;
use PhpParser\Node\Arg;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\BinaryOp;
use PhpParser\Node\Identifier;
use PhpParser\Node\Name;
use PhpParser\Node\Scalar\DNumber;
use PhpParser\Node\Scalar\LNumber;
use PhpParser\Node\Scalar\MagicConst;
use PhpParser\Node\Scalar\MagicConst\Dir;
use PhpParser\Node\Scalar\MagicConst\File;
use PhpParser\Node\Scalar\MagicConst\Line;
use PhpParser\Node\Scalar\String_;
use PHPStan\Analyser\ConstantResolver;
use PHPStan\DependencyInjection\Type\OperatorTypeSpecifyingExtensionRegistryProvider;
use PHPStan\Node\Expr\TypeExpr;
use PHPStan\Php\PhpVersion;
use PHPStan\Reflection\ReflectionProvider\ReflectionProviderProvider;
use PHPStan\ShouldNotHappenException;
use PHPStan\Type\Accessory\AccessoryArrayListType;
use PHPStan\Type\Accessory\AccessoryLiteralStringType;
use PHPStan\Type\Accessory\AccessoryNonEmptyStringType;
use PHPStan\Type\Accessory\AccessoryNonFalsyStringType;
use PHPStan\Type\Accessory\NonEmptyArrayType;
use PHPStan\Type\ArrayType;
use PHPStan\Type\BenevolentUnionType;
use PHPStan\Type\BooleanType;
use PHPStan\Type\ClassStringType;
use PHPStan\Type\Constant\ConstantArrayType;
use PHPStan\Type\Constant\ConstantArrayTypeBuilder;
use PHPStan\Type\Constant\ConstantBooleanType;
use PHPStan\Type\Constant\ConstantFloatType;
use PHPStan\Type\Constant\ConstantIntegerType;
use PHPStan\Type\Constant\ConstantStringType;
use PHPStan\Type\ConstantScalarType;
use PHPStan\Type\ConstantTypeHelper;
use PHPStan\Type\Enum\EnumCaseObjectType;
use PHPStan\Type\ErrorType;
use PHPStan\Type\FloatType;
use PHPStan\Type\GeneralizePrecision;
use PHPStan\Type\Generic\GenericClassStringType;
use PHPStan\Type\Generic\TemplateType;
use PHPStan\Type\IntegerRangeType;
use PHPStan\Type\IntegerType;
use PHPStan\Type\IntersectionType;
use PHPStan\Type\MixedType;
use PHPStan\Type\NeverType;
use PHPStan\Type\NullType;
use PHPStan\Type\ObjectType;
use PHPStan\Type\ObjectWithoutClassType;
use PHPStan\Type\StaticType;
use PHPStan\Type\StringType;
use PHPStan\Type\ThisType;
use PHPStan\Type\Type;
use PHPStan\Type\TypeCombinator;
use PHPStan\Type\TypeTraverser;
use PHPStan\Type\TypeUtils;
use PHPStan\Type\TypeWithClassName;
use PHPStan\Type\UnionType;
use function array_keys;
use function array_merge;
use function count;
use function dirname;
use function in_array;
use function is_float;
use function is_int;
use function max;
use function sprintf;
use function strtolower;
class InitializerExprTypeResolver
{
public const CALCULATE_SCALARS_LIMIT = 128;
public function __construct(
private ConstantResolver $constantResolver,
private ReflectionProviderProvider $reflectionProviderProvider,
private PhpVersion $phpVersion,
private OperatorTypeSpecifyingExtensionRegistryProvider $operatorTypeSpecifyingExtensionRegistryProvider,
private bool $usePathConstantsAsConstantString = false,
)
{
}
/** @api */
public function getType(Expr $expr, InitializerExprContext $context): Type
{
if ($expr instanceof TypeExpr) {
return $expr->getExprType();
}
if ($expr instanceof LNumber) {
return new ConstantIntegerType($expr->value);
}
if ($expr instanceof DNumber) {
return new ConstantFloatType($expr->value);
}
if ($expr instanceof String_) {
return new ConstantStringType($expr->value);
}
if ($expr instanceof Expr\ConstFetch) {
$constName = (string) $expr->name;
$loweredConstName = strtolower($constName);
if ($loweredConstName === 'true') {
return new ConstantBooleanType(true);
} elseif ($loweredConstName === 'false') {
return new ConstantBooleanType(false);
} elseif ($loweredConstName === 'null') {
return new NullType();
}
$constant = $this->constantResolver->resolveConstant($expr->name, $context);
if ($constant !== null) {
return $constant;
}
return new ErrorType();
}
if ($expr instanceof File) {
$file = $context->getFile();
if ($file === null) {
return new StringType();
}
$stringType = new ConstantStringType($file);
return $this->usePathConstantsAsConstantString ? $stringType : $stringType->generalize(GeneralizePrecision::moreSpecific());
}
if ($expr instanceof Dir) {
$file = $context->getFile();
if ($file === null) {
return new StringType();
}
$stringType = new ConstantStringType(dirname($file));
return $this->usePathConstantsAsConstantString ? $stringType : $stringType->generalize(GeneralizePrecision::moreSpecific());
}
if ($expr instanceof Line) {
return new ConstantIntegerType($expr->getLine());
}
if ($expr instanceof Expr\New_) {
if ($expr->class instanceof Name) {
return new ObjectType((string) $expr->class);
}
return new ObjectWithoutClassType();
}
if ($expr instanceof Expr\Array_) {
return $this->getArrayType($expr, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\ArrayDimFetch && $expr->dim !== null) {
$var = $this->getType($expr->var, $context);
$dim = $this->getType($expr->dim, $context);
return $var->getOffsetValueType($dim);
}
if ($expr instanceof Expr\ClassConstFetch && $expr->name instanceof Identifier) {
return $this->getClassConstFetchType($expr->class, $expr->name->toString(), $context->getClassName(), fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\UnaryPlus) {
return $this->getType($expr->expr, $context)->toNumber();
}
if ($expr instanceof Expr\UnaryMinus) {
return $this->getUnaryMinusType($expr->expr, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Coalesce) {
$leftType = $this->getType($expr->left, $context);
$rightType = $this->getType($expr->right, $context);
return TypeCombinator::union(TypeCombinator::removeNull($leftType), $rightType);
}
if ($expr instanceof Expr\Ternary) {
$condType = $this->getType($expr->cond, $context);
$elseType = $this->getType($expr->else, $context);
if ($expr->if === null) {
return TypeCombinator::union(
TypeCombinator::removeFalsey($condType),
$elseType,
);
}
$ifType = $this->getType($expr->if, $context);
return TypeCombinator::union(
TypeCombinator::removeFalsey($ifType),
$elseType,
);
}
if ($expr instanceof Expr\FuncCall && $expr->name instanceof Name && $expr->name->toLowerString() === 'constant') {
$firstArg = $expr->args[0] ?? null;
if ($firstArg instanceof Arg && $firstArg->value instanceof String_) {
$constant = $this->constantResolver->resolvePredefinedConstant($firstArg->value->value);
if ($constant !== null) {
return $constant;
}
}
}
if ($expr instanceof Expr\BooleanNot) {
$exprBooleanType = $this->getType($expr->expr, $context)->toBoolean();
if ($exprBooleanType instanceof ConstantBooleanType) {
return new ConstantBooleanType(!$exprBooleanType->getValue());
}
return new BooleanType();
}
if ($expr instanceof Expr\BitwiseNot) {
return $this->getBitwiseNotType($expr->expr, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Concat) {
return $this->getConcatType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\BitwiseAnd) {
return $this->getBitwiseAndType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\BitwiseOr) {
return $this->getBitwiseOrType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\BitwiseXor) {
return $this->getBitwiseXorType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Spaceship) {
return $this->getSpaceshipType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if (
$expr instanceof Expr\BinaryOp\BooleanAnd
|| $expr instanceof Expr\BinaryOp\LogicalAnd
|| $expr instanceof Expr\BinaryOp\BooleanOr
|| $expr instanceof Expr\BinaryOp\LogicalOr
) {
return new BooleanType();
}
if ($expr instanceof Expr\BinaryOp\Div) {
return $this->getDivType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Mod) {
return $this->getModType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Plus) {
return $this->getPlusType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Minus) {
return $this->getMinusType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Mul) {
return $this->getMulType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\Pow) {
return $this->getPowType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\ShiftLeft) {
return $this->getShiftLeftType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof Expr\BinaryOp\ShiftRight) {
return $this->getShiftRightType($expr->left, $expr->right, fn (Expr $expr): Type => $this->getType($expr, $context));
}
if ($expr instanceof BinaryOp\Identical) {
return $this->resolveIdenticalType(
$this->getType($expr->left, $context),
$this->getType($expr->right, $context),
);
}
if ($expr instanceof BinaryOp\NotIdentical) {
return $this->getType(new Expr\BooleanNot(new BinaryOp\Identical($expr->left, $expr->right)), $context);
}
if ($expr instanceof BinaryOp\Equal) {
return $this->resolveEqualType(
$this->getType($expr->left, $context),
$this->getType($expr->right, $context),
);
}
if ($expr instanceof BinaryOp\NotEqual) {
return $this->getType(new Expr\BooleanNot(new BinaryOp\Equal($expr->left, $expr->right)), $context);
}
if ($expr instanceof Expr\BinaryOp\Smaller) {
return $this->getType($expr->left, $context)->isSmallerThan($this->getType($expr->right, $context))->toBooleanType();
}
if ($expr instanceof Expr\BinaryOp\SmallerOrEqual) {
return $this->getType($expr->left, $context)->isSmallerThanOrEqual($this->getType($expr->right, $context))->toBooleanType();
}
if ($expr instanceof Expr\BinaryOp\Greater) {
return $this->getType($expr->right, $context)->isSmallerThan($this->getType($expr->left, $context))->toBooleanType();
}
if ($expr instanceof Expr\BinaryOp\GreaterOrEqual) {
return $this->getType($expr->right, $context)->isSmallerThanOrEqual($this->getType($expr->left, $context))->toBooleanType();
}
if ($expr instanceof Expr\BinaryOp\LogicalXor) {
$leftBooleanType = $this->getType($expr->left, $context)->toBoolean();
$rightBooleanType = $this->getType($expr->right, $context)->toBoolean();
if (
$leftBooleanType instanceof ConstantBooleanType
&& $rightBooleanType instanceof ConstantBooleanType
) {
return new ConstantBooleanType(
$leftBooleanType->getValue() xor $rightBooleanType->getValue(),
);
}
return new BooleanType();
}
if ($expr instanceof MagicConst\Class_) {
if ($context->getClassName() === null) {
return new ConstantStringType('');
}
return new ConstantStringType($context->getClassName(), true);
}
if ($expr instanceof MagicConst\Namespace_) {
return new ConstantStringType($context->getNamespace() ?? '');
}
if ($expr instanceof MagicConst\Method) {
return new ConstantStringType($context->getMethod() ?? '');
}
if ($expr instanceof MagicConst\Function_) {
return new ConstantStringType($context->getFunction() ?? '');
}
if ($expr instanceof MagicConst\Trait_) {
if ($context->getTraitName() === null) {
return new ConstantStringType('');
}
return new ConstantStringType($context->getTraitName(), true);
}
return new MixedType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getConcatType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
return $this->resolveConcatType($leftType, $rightType);
}
public function resolveConcatType(Type $left, Type $right): Type
{
$leftStringType = $left->toString();
$rightStringType = $right->toString();
if (TypeCombinator::union(
$leftStringType,
$rightStringType,
) instanceof ErrorType) {
return new ErrorType();
}
if ($leftStringType instanceof ConstantStringType && $leftStringType->getValue() === '') {
return $rightStringType;
}
if ($rightStringType instanceof ConstantStringType && $rightStringType->getValue() === '') {
return $leftStringType;
}
if ($leftStringType instanceof ConstantStringType && $rightStringType instanceof ConstantStringType) {
return $leftStringType->append($rightStringType);
}
$leftConstantStrings = $leftStringType->getConstantStrings();
$rightConstantStrings = $rightStringType->getConstantStrings();
$combinedConstantStringsCount = count($leftConstantStrings) * count($rightConstantStrings);
// we limit the number of union-types for performance reasons
if ($combinedConstantStringsCount > 0 && $combinedConstantStringsCount <= 16) {
$strings = [];
foreach ($leftConstantStrings as $leftConstantString) {
if ($leftConstantString->getValue() === '') {
$strings = array_merge($strings, $rightConstantStrings);
continue;
}
foreach ($rightConstantStrings as $rightConstantString) {
if ($rightConstantString->getValue() === '') {
$strings[] = $leftConstantString;
continue;
}
$strings[] = $leftConstantString->append($rightConstantString);
}
}
if (count($strings) > 0) {
return TypeCombinator::union(...$strings);
}
}
$accessoryTypes = [];
if ($leftStringType->isNonEmptyString()->and($rightStringType->isNonEmptyString())->yes()) {
$accessoryTypes[] = new AccessoryNonFalsyStringType();
} elseif ($leftStringType->isNonFalsyString()->or($rightStringType->isNonFalsyString())->yes()) {
$accessoryTypes[] = new AccessoryNonFalsyStringType();
} elseif ($leftStringType->isNonEmptyString()->or($rightStringType->isNonEmptyString())->yes()) {
$accessoryTypes[] = new AccessoryNonEmptyStringType();
}
if ($leftStringType->isLiteralString()->and($rightStringType->isLiteralString())->yes()) {
$accessoryTypes[] = new AccessoryLiteralStringType();
}
if (count($accessoryTypes) > 0) {
$accessoryTypes[] = new StringType();
return new IntersectionType($accessoryTypes);
}
return new StringType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getArrayType(Expr\Array_ $expr, callable $getTypeCallback): Type
{
$arrayBuilder = ConstantArrayTypeBuilder::createEmpty();
if (count($expr->items) > ConstantArrayTypeBuilder::ARRAY_COUNT_LIMIT) {
$arrayBuilder->degradeToGeneralArray();
}
$isList = null;
foreach ($expr->items as $arrayItem) {
if ($arrayItem === null) {
continue;
}
$valueType = $getTypeCallback($arrayItem->value);
if ($arrayItem->unpack) {
if ($valueType instanceof ConstantArrayType) {
$hasStringKey = false;
foreach ($valueType->getKeyTypes() as $keyType) {
if ($keyType instanceof ConstantStringType) {
$hasStringKey = true;
break;
}
}
foreach ($valueType->getValueTypes() as $i => $innerValueType) {
if ($hasStringKey && $this->phpVersion->supportsArrayUnpackingWithStringKeys()) {
$arrayBuilder->setOffsetValueType($valueType->getKeyTypes()[$i], $innerValueType, $valueType->isOptionalKey($i));
} else {
$arrayBuilder->setOffsetValueType(null, $innerValueType, $valueType->isOptionalKey($i));
}
}
} else {
$arrayBuilder->degradeToGeneralArray();
if ($this->phpVersion->supportsArrayUnpackingWithStringKeys() && !$valueType->getIterableKeyType()->isString()->no()) {
$isList = false;
$offsetType = $valueType->getIterableKeyType();
} else {
$isList ??= $arrayBuilder->isList();
$offsetType = new IntegerType();
}
$arrayBuilder->setOffsetValueType($offsetType, $valueType->getIterableValueType(), !$valueType->isIterableAtLeastOnce()->yes());
}
} else {
$arrayBuilder->setOffsetValueType(
$arrayItem->key !== null ? $getTypeCallback($arrayItem->key) : null,
$valueType,
);
}
}
$arrayType = $arrayBuilder->getArray();
if ($isList === true) {
return AccessoryArrayListType::intersectWith($arrayType);
}
return $arrayType;
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getBitwiseAndType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
if ($leftType instanceof NeverType || $rightType instanceof NeverType) {
return $this->getNeverType($leftType, $rightType);
}
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
if ($leftTypeInner instanceof ConstantStringType && $rightTypeInner instanceof ConstantStringType) {
$resultType = $this->getTypeFromValue($leftTypeInner->getValue() & $rightTypeInner->getValue());
} else {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
$resultType = $this->getTypeFromValue($leftNumberType->getValue() & $rightNumberType->getValue());
}
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
return new StringType();
}
$leftNumberType = $leftType->toNumber();
$rightNumberType = $rightType->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if ($rightNumberType instanceof ConstantIntegerType && $rightNumberType->getValue() >= 0) {
return IntegerRangeType::fromInterval(0, $rightNumberType->getValue());
}
if ($leftNumberType instanceof ConstantIntegerType && $leftNumberType->getValue() >= 0) {
return IntegerRangeType::fromInterval(0, $leftNumberType->getValue());
}
return new IntegerType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getBitwiseOrType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
if ($leftType instanceof NeverType || $rightType instanceof NeverType) {
return $this->getNeverType($leftType, $rightType);
}
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
if ($leftTypeInner instanceof ConstantStringType && $rightTypeInner instanceof ConstantStringType) {
$resultType = $this->getTypeFromValue($leftTypeInner->getValue() | $rightTypeInner->getValue());
} else {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
$resultType = $this->getTypeFromValue($leftNumberType->getValue() | $rightNumberType->getValue());
}
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
return new StringType();
}
if (TypeCombinator::union($leftType->toNumber(), $rightType->toNumber()) instanceof ErrorType) {
return new ErrorType();
}
return new IntegerType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getBitwiseXorType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
if ($leftType instanceof NeverType || $rightType instanceof NeverType) {
return $this->getNeverType($leftType, $rightType);
}
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
if ($leftTypeInner instanceof ConstantStringType && $rightTypeInner instanceof ConstantStringType) {
$resultType = $this->getTypeFromValue($leftTypeInner->getValue() ^ $rightTypeInner->getValue());
} else {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
$resultType = $this->getTypeFromValue($leftNumberType->getValue() ^ $rightNumberType->getValue());
}
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
if ($leftType->isString()->yes() && $rightType->isString()->yes()) {
return new StringType();
}
if (TypeCombinator::union($leftType->toNumber(), $rightType->toNumber()) instanceof ErrorType) {
return new ErrorType();
}
return new IntegerType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getSpaceshipType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$callbackLeftType = $getTypeCallback($left);
$callbackRightType = $getTypeCallback($right);
if ($callbackLeftType instanceof NeverType || $callbackRightType instanceof NeverType) {
return $this->getNeverType($callbackLeftType, $callbackRightType);
}
$leftTypes = TypeUtils::getConstantScalars($callbackLeftType);
$rightTypes = TypeUtils::getConstantScalars($callbackRightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftType) {
foreach ($rightTypes as $rightType) {
$leftValue = $leftType->getValue();
$rightValue = $rightType->getValue();
$resultType = $this->getTypeFromValue($leftValue <=> $rightValue);
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
return IntegerRangeType::fromInterval(-1, 1);
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getDivType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
if ($rightNumberType->getValue() === 0 || $rightNumberType->getValue() === 0.0) {
return new ErrorType();
}
$resultType = $this->getTypeFromValue($leftNumberType->getValue() / $rightNumberType->getValue()); // @phpstan-ignore-line
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
$rightScalarTypes = TypeUtils::getConstantScalars($rightType->toNumber());
foreach ($rightScalarTypes as $scalarType) {
if (
$scalarType->getValue() === 0
|| $scalarType->getValue() === 0.0
) {
return new ErrorType();
}
}
return $this->resolveCommonMath(new BinaryOp\Div($left, $right), $leftType, $rightType);
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getModType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
if ($leftType instanceof NeverType || $rightType instanceof NeverType) {
return $this->getNeverType($leftType, $rightType);
}
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
$rightIntegerValue = (int) $rightNumberType->getValue();
if ($rightIntegerValue === 0) {
return new ErrorType();
}
$resultType = $this->getTypeFromValue((int) $leftNumberType->getValue() % $rightIntegerValue);
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
$integerType = $rightType->toInteger();
if ($integerType instanceof ConstantIntegerType && $integerType->getValue() === 1) {
return new ConstantIntegerType(0);
}
$rightScalarTypes = TypeUtils::getConstantScalars($rightType->toNumber());
foreach ($rightScalarTypes as $scalarType) {
if (
$scalarType->getValue() === 0
|| $scalarType->getValue() === 0.0
) {
return new ErrorType();
}
}
$integer = new IntegerType();
$positiveInt = IntegerRangeType::fromInterval(0, null);
if ($integer->isSuperTypeOf($rightType)->yes()) {
$rangeMin = null;
$rangeMax = null;
if ($rightType instanceof IntegerRangeType) {
$rangeMax = $rightType->getMax() !== null ? $rightType->getMax() - 1 : null;
} elseif ($rightType instanceof ConstantIntegerType) {
$rangeMax = $rightType->getValue() - 1;
} elseif ($rightType instanceof UnionType) {
foreach ($rightType->getTypes() as $type) {
if ($type instanceof IntegerRangeType) {
if ($type->getMax() === null) {
$rangeMax = null;
} else {
$rangeMax = max($rangeMax, $type->getMax());
}
} elseif ($type instanceof ConstantIntegerType) {
$rangeMax = max($rangeMax, $type->getValue() - 1);
}
}
}
if ($positiveInt->isSuperTypeOf($leftType)->yes()) {
$rangeMin = 0;
} elseif ($rangeMax !== null) {
$rangeMin = $rangeMax * -1;
}
return IntegerRangeType::fromInterval($rangeMin, $rangeMax);
} elseif ($positiveInt->isSuperTypeOf($leftType)->yes()) {
return IntegerRangeType::fromInterval(0, null);
}
return new IntegerType();
}
/**
* @param callable(Expr): Type $getTypeCallback
*/
public function getPlusType(Expr $left, Expr $right, callable $getTypeCallback): Type
{
$leftType = $getTypeCallback($left);
$rightType = $getTypeCallback($right);
if ($leftType instanceof NeverType || $rightType instanceof NeverType) {
return $this->getNeverType($leftType, $rightType);
}
$leftTypes = TypeUtils::getConstantScalars($leftType);
$rightTypes = TypeUtils::getConstantScalars($rightType);
$leftTypesCount = count($leftTypes);
$rightTypesCount = count($rightTypes);
if ($leftTypesCount > 0 && $rightTypesCount > 0) {
$resultTypes = [];
$generalize = $leftTypesCount * $rightTypesCount > self::CALCULATE_SCALARS_LIMIT;
foreach ($leftTypes as $leftTypeInner) {
foreach ($rightTypes as $rightTypeInner) {
$leftNumberType = $leftTypeInner->toNumber();
$rightNumberType = $rightTypeInner->toNumber();
if ($leftNumberType instanceof ErrorType || $rightNumberType instanceof ErrorType) {
return new ErrorType();
}
if (!$leftNumberType instanceof ConstantScalarType || !$rightNumberType instanceof ConstantScalarType) {
throw new ShouldNotHappenException();
}
$resultType = $this->getTypeFromValue($leftNumberType->getValue() + $rightNumberType->getValue());
if ($generalize) {
$resultType = $resultType->generalize(GeneralizePrecision::lessSpecific());
}
$resultTypes[] = $resultType;
}
}
return TypeCombinator::union(...$resultTypes);
}
$leftConstantArrays = $leftType->getConstantArrays();
$rightConstantArrays = $rightType->getConstantArrays();
$leftCount = count($leftConstantArrays);
$rightCount = count($rightConstantArrays);
if ($leftCount > 0 && $rightCount > 0
&& ($leftCount + $rightCount < ConstantArrayTypeBuilder::ARRAY_COUNT_LIMIT)) {
$resultTypes = [];
foreach ($rightConstantArrays as $rightConstantArray) {
foreach ($leftConstantArrays as $leftConstantArray) {
$newArrayBuilder = ConstantArrayTypeBuilder::createFromConstantArray($rightConstantArray);
foreach ($leftConstantArray->getKeyTypes() as $i => $leftKeyType) {
$optional = $leftConstantArray->isOptionalKey($i);
$valueType = $leftConstantArray->getOffsetValueType($leftKeyType);
if (!$optional) {
if ($rightConstantArray->hasOffsetValueType($leftKeyType)->maybe()) {
$valueType = TypeCombinator::union($valueType, $rightConstantArray->getOffsetValueType($leftKeyType));
}
}
$newArrayBuilder->setOffsetValueType(
$leftKeyType,
$valueType,
$optional,
);
}
$resultTypes[] = $newArrayBuilder->getArray();
}
}
return TypeCombinator::union(...$resultTypes);
}
$leftIsArray = $leftType->isArray();
$rightIsArray = $rightType->isArray();
if ($leftIsArray->yes() && $rightIsArray->yes()) {
if ($leftType->getIterableKeyType()->equals($rightType->getIterableKeyType())) {
// to preserve BenevolentUnionType
$keyType = $leftType->getIterableKeyType();
} else {
$keyTypes = [];
foreach ([
$leftType->getIterableKeyType(),
$rightType->getIterableKeyType(),
] as $keyType) {
$keyTypes[] = $keyType;
}
$keyType = TypeCombinator::union(...$keyTypes);
}
$arrayType = new ArrayType(
$keyType,
TypeCombinator::union($leftType->getIterableValueType(), $rightType->getIterableValueType()),
);
if ($leftType->isIterableAtLeastOnce()->yes() || $rightType->isIterableAtLeastOnce()->yes()) {
$arrayType = TypeCombinator::intersect($arrayType, new NonEmptyArrayType());
}
if ($leftType->isList()->yes() && $rightType->isList()->yes()) {
$arrayType = AccessoryArrayListType::intersectWith($arrayType);
}
return $arrayType;
}
if ($leftType instanceof MixedType && $rightType instanceof MixedType) {
if (
($leftIsArray->no() && $rightIsArray->no())
) {
return new BenevolentUnionType([
new FloatType(),
new IntegerType(),
]);
}
return new BenevolentUnionType([
new FloatType(),
new IntegerType(),