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instanceof.php
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instanceof.php
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<?php
namespace InstanceOfNamespace;
use PhpParser\Node\Expr;
use PhpParser\Node\Expr\ArrayDimFetch;
use function PHPStan\Testing\assertType;
interface BarInterface
{
}
abstract class BarParent
{
}
class Foo extends BarParent
{
public function someMethod(Expr $foo)
{
$bar = $foo;
$baz = doFoo();
$intersected = new Foo();
$parent = doFoo();
if ($baz instanceof Foo) {
// ...
} else {
while ($foo instanceof ArrayDimFetch) {
assert($lorem instanceof Lorem);
if ($dolor instanceof Dolor && $sit instanceof Sit) {
if ($static instanceof static) {
if ($self instanceof self) {
if ($intersected instanceof BarInterface) {
if ($this instanceof BarInterface) {
if ($parent instanceof parent) {
assertType('PhpParser\Node\Expr\ArrayDimFetch', $foo);
assertType('PhpParser\Node\Expr', $bar);
assertType('*ERROR*', $baz);
assertType('InstanceOfNamespace\Lorem', $lorem);
assertType('InstanceOfNamespace\Dolor', $dolor);
assertType('InstanceOfNamespace\Sit', $sit);
assertType('InstanceOfNamespace\Foo', $self);
assertType('static(InstanceOfNamespace\Foo)', $static);
assertType('static(InstanceOfNamespace\Foo)', clone $static);
assertType('InstanceOfNamespace\BarInterface&InstanceOfNamespace\Foo', $intersected);
assertType('$this(InstanceOfNamespace\Foo)&InstanceOfNamespace\BarInterface', $this);
assertType('InstanceOfNamespace\BarParent', $parent);
}
}
}
}
}
}
}
}
}
/**
* @template ObjectT of BarInterface
* @template MixedT
*
* @param class-string<Foo> $classString
* @param class-string<Foo>|class-string<BarInterface> $union
* @param class-string<Foo>&class-string<BarInterface> $intersection
* @param BarInterface $instance
* @param ObjectT $objectT
* @param class-string<ObjectT> $objectTString
* @param class-string<MixedT> $mixedTString
* @param object $object
*/
public function testExprInstanceof($subject, string $classString, $union, $intersection, string $other, $instance, $objectT, $objectTString, $mixedTString, string $string, $object)
{
assertType('bool', $subject instanceof $classString);
if ($subject instanceof $classString) {
assertType('InstanceOfNamespace\Foo', $subject);
assertType('true', $subject instanceof Foo);
assertType('bool', $subject instanceof $classString);
} else {
assertType('mixed~InstanceOfNamespace\Foo', $subject);
assertType('false', $subject instanceof Foo);
assertType('false', $subject instanceof $classString);
}
$constantString = 'InstanceOfNamespace\BarParent';
assertType('bool', $subject instanceof $constantString);
if ($subject instanceof $constantString) {
assertType('InstanceOfNamespace\BarParent', $subject);
assertType('true', $subject instanceof BarParent);
assertType('true', $subject instanceof $constantString);
} else {
assertType('mixed~InstanceOfNamespace\BarParent', $subject);
assertType('false', $subject instanceof BarParent);
assertType('false', $subject instanceof $constantString);
}
assertType('bool', $subject instanceof $union);
if ($subject instanceof $union) {
assertType('InstanceOfNamespace\BarInterface|InstanceOfNamespace\Foo', $subject);
assertType('bool', $subject instanceof $union);
assertType('bool', $subject instanceof BarInterface);
assertType('bool', $subject instanceof Foo);
assertType('true', $subject instanceof Foo || $subject instanceof BarInterface);
}
if ($subject instanceof $intersection) {
assertType('InstanceOfNamespace\BarInterface&InstanceOfNamespace\Foo', $subject);
assertType('bool', $subject instanceof $intersection);
assertType('true', $subject instanceof BarInterface);
assertType('true', $subject instanceof Foo);
}
if ($subject instanceof $instance) {
assertType('InstanceOfNamespace\BarInterface', $subject);
assertType('bool', $subject instanceof $instance);
assertType('true', $subject instanceof BarInterface);
}
if ($subject instanceof $other) {
assertType('object', $subject);
assertType('bool', $subject instanceof $other);
} else {
assertType('mixed', $subject);
assertType('bool', $subject instanceof $other);
}
if ($subject instanceof $objectT) {
assertType('ObjectT of InstanceOfNamespace\BarInterface (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $objectT);
} else {
assertType('mixed~ObjectT of InstanceOfNamespace\BarInterface (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $objectT); // can be false
}
if ($subject instanceof $objectTString) {
assertType('ObjectT of InstanceOfNamespace\BarInterface (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $objectTString);
} else {
assertType('mixed~ObjectT of InstanceOfNamespace\BarInterface (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $objectTString); // can be false
}
if ($subject instanceof $mixedTString) {
assertType('MixedT (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)&object', $subject);
assertType('bool', $subject instanceof $mixedTString);
} else {
assertType('mixed~MixedT (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $mixedTString); // can be false
}
if ($subject instanceof $string) {
assertType('object', $subject);
assertType('bool', $subject instanceof $string);
} else {
assertType('mixed~MixedT (method InstanceOfNamespace\Foo::testExprInstanceof(), argument)', $subject);
assertType('bool', $subject instanceof $string);
}
if ($object instanceof $string) {
assertType('object', $object);
assertType('bool', $object instanceof $string);
} else {
assertType('object', $object);
assertType('bool', $object instanceof $string);
}
if ($object instanceof $object) {
assertType('object', $object);
assertType('bool', $object instanceof $object);
} else {
assertType('object', $object);
assertType('bool', $object instanceof $object);
}
if ($object instanceof $classString) {
assertType('InstanceOfNamespace\Foo', $object);
assertType('bool', $object instanceof $classString);
} else {
assertType('object~InstanceOfNamespace\Foo', $object);
assertType('false', $object instanceof $classString);
}
if ($instance instanceof $string) {
assertType('InstanceOfNamespace\BarInterface', $instance);
assertType('bool', $instance instanceof $string);
} else {
assertType('InstanceOfNamespace\BarInterface', $instance);
assertType('bool', $instance instanceof $string);
}
if ($instance instanceof $object) {
assertType('InstanceOfNamespace\BarInterface', $instance);
assertType('bool', $instance instanceof $object);
} else {
assertType('InstanceOfNamespace\BarInterface', $instance);
assertType('bool', $object instanceof $object);
}
if ($instance instanceof $classString) {
assertType('InstanceOfNamespace\BarInterface&InstanceOfNamespace\Foo', $instance);
assertType('bool', $instance instanceof $classString);
} else {
assertType('InstanceOfNamespace\BarInterface', $instance);
assertType('bool', $instance instanceof $classString);
}
}
}