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ConstantTrait.php
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ConstantTrait.php
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<?php
declare(strict_types=1);
namespace Phan\Language\Element;
use ast\Node;
use Closure;
/**
* Represents functionality common to GlobalConstant and ClassConstant
* for APIs Phan has for representations of constants.
*
* @see ConstantInterface - Classes using this trait use this interface
*/
trait ConstantTrait
{
use ElementFutureUnionType;
/** @var Node|string|float|int|resource the node (or built-in value) which defined the value of this constant. */
protected $defining_node;
/**
* @return string
* The (not fully-qualified) name of this element.
*/
abstract public function getName(): string;
public function __toString(): string
{
return 'const ' . $this->getName();
}
/**
* Sets the node with the AST representing the value of this constant.
*
* @param Node|string|float|int|resource $node Either a node or a constant to be used as the value of the constant.
* Can be resource for STDERR, etc.
*/
public function setNodeForValue($node): void
{
$this->defining_node = $node;
}
/**
* Gets the node with the AST representing the value of this constant.
*
* @return Node|string|float|int|resource
*/
public function getNodeForValue()
{
return $this->defining_node;
}
/**
* Used by daemon mode to restore an element to the state it had before parsing.
* @internal
*/
public function createRestoreCallback(): ?Closure
{
$future_union_type = $this->future_union_type;
if ($future_union_type === null) {
// We already inferred the type for this class constant/global constant.
// Nothing to do.
return null;
}
// If this refers to a class constant in another file,
// the resolved union type might change if that file changes.
return function () use ($future_union_type): void {
$this->future_union_type = $future_union_type;
// Probably don't need to call setUnionType(mixed) again...
};
}
}

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