Class DynamicObject.SetDynamicTypeNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.object.DynamicObject.SetDynamicTypeNode

All Implemented Interfaces:

NodeInterface, Cloneable

Enclosing class:

DynamicObject

public abstract static class DynamicObject.SetDynamicTypeNode
extends Node

Sets the language-specific dynamic type identifier.

Since:

25.1

See Also:

• execute(DynamicObject, Object)

Nested Class Summary

Nested classes/interfaces inherited from class Node

Node.Child, Node.Children

Method Summary

Modifier and Type	Method	Description
static DynamicObject.SetDynamicTypeNode	create()
abstract boolean	execute(DynamicObject receiver, Object type)	Sets the object's dynamic type identifier.
static DynamicObject.SetDynamicTypeNode	getUncached()

Methods inherited from class Node

accept, adoptChildren, atomic, atomic, copy, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, getSourceSection, insert, insert, isAdoptable, isSafelyReplaceableBy, notifyInserted, onReplace, replace, replace, reportPolymorphicSpecialize, reportReplace, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Details

execute

public abstract boolean execute(DynamicObject receiver,
 Object type)

Sets the object's dynamic type identifier. What this type represents is completely up to the language. For example, it could be a guest-language class. The type object is strongly referenced from the shape. It should ideally be a singleton or light-weight object without any references to guest language objects in order to keep the memory footprint low and prevent potential memory leaks from holding onto the Shape in inline caches. The Shape transition itself is weak, so the previous shapes will not hold strongly on the type object. Type objects are always compared by object identity, never equals.

Parameters:

type - a non-null type identifier defined by the guest language.

Returns:

true if the type (and the object's shape) changed

See Also:

• DynamicObject.GetDynamicTypeNode

create

public static DynamicObject.SetDynamicTypeNode create()

Since:

25.1

getUncached

public static DynamicObject.SetDynamicTypeNode getUncached()

Since:

25.1