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CallableType.php
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CallableType.php
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<?php
declare(strict_types=1);
namespace Phan\Language\Type;
use Phan\CodeBase;
use Phan\Language\Context;
use Phan\Language\Type;
/**
* Phan's representation for `callable`
*
* @see CallableDeclarationType for Phan's representation of `callable(MyClass):MyOtherClass`
* @phan-pure
*/
final class CallableType extends NativeType implements CallableInterface
{
use NativeTypeTrait;
/** @phan-override */
public const NAME = 'callable';
/**
* @return bool
* True if this type is a callable or a Closure.
* @unused-param $code_base
*/
public function isCallable(CodeBase $code_base): bool
{
return true;
}
protected function canCastToNonNullableType(Type $type, CodeBase $code_base): bool
{
// CallableDeclarationType is not a native type, we check separately here
return parent::canCastToNonNullableType($type, $code_base) || $type instanceof CallableDeclarationType;
}
protected function canCastToNonNullableTypeWithoutConfig(Type $type, CodeBase $code_base): bool
{
// CallableDeclarationType is not a native type, we check separately here
return parent::canCastToNonNullableTypeWithoutConfig($type, $code_base) || $type instanceof CallableDeclarationType;
}
/**
* Returns true if this contains a type that is definitely non-callable
* e.g. returns true for false, array, int
* returns false for callable, string, array, object, iterable, T, etc.
* @unused-param $code_base
*/
public function isDefiniteNonCallableType(CodeBase $code_base): bool
{
return false;
}
public function isPossiblyObject(): bool
{
return true; // callable-object, Closure, etc. are objects
}
public function asObjectType(): ?Type
{
return CallableObjectType::instance(false);
}
/**
* Convert this to a subtype that satisfies is_array(), or returns null
* @see UnionType::arrayTypesStrictCast
*/
public function asArrayType(): ?Type
{
return CallableArrayType::instance(false);
}
public function asScalarType(): ?Type
{
return CallableStringType::instance(false);
}
public function canCastToDeclaredType(CodeBase $code_base, Context $context, Type $other): bool
{
if ($other instanceof IterableType) {
return !$other->isDefiniteNonCallableType($code_base);
}
// TODO: More specific.
return $other instanceof StringType
|| $other instanceof ObjectType
|| $other instanceof IterableType
|| parent::canCastToDeclaredType($code_base, $context, $other);
}
/** @unused-param $code_base */
public function isSubtypeOfNonNullableType(Type $type, CodeBase $code_base): bool
{
return $type instanceof CallableType || $type instanceof MixedType;
}
}

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CallableType.php (2 KB)

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