Class Nullish

java.lang.Object

com.oracle.truffle.api.object.DynamicObject

com.oracle.truffle.js.runtime.objects.JSDynamicObject

com.oracle.truffle.js.runtime.objects.Nullish

All Implemented Interfaces:

com.oracle.truffle.api.interop.TruffleObject

public final class Nullish
extends JSDynamicObject

Nested Class Summary

Nested classes/interfaces inherited from class JSDynamicObject

JSDynamicObject.IsIdenticalOrUndefined, JSDynamicObject.ToBoolean, JSDynamicObject.ToNumber, JSDynamicObject.ToString

Nested classes/interfaces inherited from class com.oracle.truffle.api.object.DynamicObject

com.oracle.truffle.api.object.DynamicObject.DynamicField

Constructor Summary

Constructors

Constructor	Description
Nullish()

Method Summary

Modifier and Type	Method	Description
com.oracle.truffle.api.strings.TruffleString	defaultToString()	Returns the equivalent of Object.prototype.toString(), i.e., for ES2015+: "[object " + toStringTag + "]", where toStringTag is either the value of the object's Symbol.toStringTag property, if present and a string value, or else, the builtinTag (default: "Object") according to Object.prototype.toString().
boolean	defineOwnProperty(Object key, PropertyDescriptor desc, boolean doThrow)	[[DefineOwnProperty]] (P, Desc).
boolean	delete(long index, boolean isStrict)
boolean	delete(Object index, boolean isStrict)	[[Delete]] (P).
com.oracle.truffle.api.strings.TruffleString	getBuiltinToStringTag()	Returns builtinTag as per Object.prototype.toString().
com.oracle.truffle.api.strings.TruffleString	getClassName()	The [[Class]] internal property.
Object	getHelper(Object thisObj, long index, com.oracle.truffle.api.nodes.Node encapsulatingNode)
Object	getHelper(Object thisObj, Object name, com.oracle.truffle.api.nodes.Node encapsulatingNode)
Object	getMethodHelper(Object thisObj, Object name, com.oracle.truffle.api.nodes.Node encapsulatingNode)
Object	getOwnHelper(Object thisObj, long index, com.oracle.truffle.api.nodes.Node encapsulatingNode)
Object	getOwnHelper(Object thisObj, Object name, com.oracle.truffle.api.nodes.Node encapsulatingNode)
PropertyDescriptor	getOwnProperty(Object propertyKey)	[[GetOwnProperty]] (P).
List<Object>	getOwnPropertyKeys(boolean string, boolean symbols)	GetOwnPropertyKeys (O, type).
JSDynamicObject	getPrototypeOf()	[[GetPrototypeOf]] ().
boolean	hasOnlyShapeProperties()	If true, JSDynamicObject.ownPropertyKeys() and JSShape.getPropertyKeyList(Shape, boolean, boolean) enumerate the same keys.
boolean	hasOwnProperty(long propIdx)
boolean	hasOwnProperty(Object propName)
boolean	hasProperty(long propIdx)
boolean	hasProperty(Object propName)	[[HasProperty]] (P).
boolean	isExtensible()	[IsExtensible]] ().
boolean	preventExtensions(boolean doThrow)	[[PreventExtensions]] ().
boolean	set(long index, Object value, Object receiver, boolean isStrict, com.oracle.truffle.api.nodes.Node encapsulatingNode)
boolean	set(Object key, Object value, Object receiver, boolean isStrict, com.oracle.truffle.api.nodes.Node encapsulatingNode)	[[Set]] (P, V, Receiver).
boolean	setIntegrityLevel(boolean freeze, boolean doThrow)	SetIntegrityLevel(O, level).
boolean	setPrototypeOf(JSDynamicObject newPrototype)	[[SetPrototypeOf]] (V).
boolean	testIntegrityLevel(boolean frozen)	TestIntegrityLevel(O, level).
com.oracle.truffle.api.strings.TruffleString	toDisplayStringImpl(boolean allowSideEffects, ToDisplayStringFormat format, int depth)	A more informative toString variant, mainly used for error messages.
String	toString()

Methods inherited from class JSDynamicObject

getDynamicType, getJSClass, getJSContext, getJSSharedData, getObjectFlags, getOrDefault, getOrNull, getPropertyArray, getPropertyFlags, getValue, getValue, hasProperty, identityHashCode, isJSDynamicObject, ownPropertyKeys, setJSClass, setObjectFlags, setPropertyFlags, testProperties, updatePropertyFlags

Methods inherited from class com.oracle.truffle.api.object.DynamicObject

clone, getShape

Methods inherited from class Object

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

Constructor Details

Nullish

public Nullish()

Method Details

getClassName

public com.oracle.truffle.api.strings.TruffleString getClassName()

Description copied from class: JSDynamicObject

The [[Class]] internal property. For ES5, this is the second part of what Object.prototype.toString.call(myObj) returns, e.g. "[object Array]".

Specified by:

getClassName in class JSDynamicObject

getBuiltinToStringTag

public com.oracle.truffle.api.strings.TruffleString getBuiltinToStringTag()

Description copied from class: JSDynamicObject

Returns builtinTag as per Object.prototype.toString(). By default returns "Object".

Specified by:

getBuiltinToStringTag in class JSDynamicObject

Returns:

built-in toStringTag

toDisplayStringImpl

public com.oracle.truffle.api.strings.TruffleString toDisplayStringImpl(boolean allowSideEffects,
 ToDisplayStringFormat format,
 int depth)

Description copied from class: JSDynamicObject

A more informative toString variant, mainly used for error messages.

Specified by:

toDisplayStringImpl in class JSDynamicObject

Parameters:

format - formatting parameters

depth - current nesting depth

defaultToString

public com.oracle.truffle.api.strings.TruffleString defaultToString()

Description copied from class: JSDynamicObject

Returns the equivalent of Object.prototype.toString(), i.e., for ES2015+: "[object " + toStringTag + "]", where toStringTag is either the value of the object's Symbol.toStringTag property, if present and a string value, or else, the builtinTag (default: "Object") according to Object.prototype.toString(). For ES5, the [[Class]] internal property is used instead, i.e.: "[object " + [[Class]] + "]", although in some cases we still use Symbol.toStringTag to override [[Class]] for Nashorn compatibility.

Overrides:

defaultToString in class JSDynamicObject

See Also:

• JSDynamicObject.getBuiltinToStringTag()

getOwnHelper

public Object getOwnHelper(Object thisObj,
 Object name,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

getOwnHelper in class JSDynamicObject

getOwnHelper

public Object getOwnHelper(Object thisObj,
 long index,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

getOwnHelper in class JSDynamicObject

getMethodHelper

public Object getMethodHelper(Object thisObj,
 Object name,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

getMethodHelper in class JSDynamicObject

getHelper

public Object getHelper(Object thisObj,
 Object name,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

getHelper in class JSDynamicObject

getHelper

public Object getHelper(Object thisObj,
 long index,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

getHelper in class JSDynamicObject

hasOwnProperty

public boolean hasOwnProperty(Object propName)

Specified by:

hasOwnProperty in class JSDynamicObject

hasOwnProperty

public boolean hasOwnProperty(long propIdx)

Specified by:

hasOwnProperty in class JSDynamicObject

hasProperty

public boolean hasProperty(Object propName)

Description copied from class: JSDynamicObject

[[HasProperty]] (P).

Specified by:

hasProperty in class JSDynamicObject

hasProperty

public boolean hasProperty(long propIdx)

Specified by:

hasProperty in class JSDynamicObject

set

public boolean set(Object key,
 Object value,
 Object receiver,
 boolean isStrict,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Description copied from class: JSDynamicObject

[[Set]] (P, V, Receiver).

Specified by:

set in class JSDynamicObject

set

public boolean set(long index,
 Object value,
 Object receiver,
 boolean isStrict,
 com.oracle.truffle.api.nodes.Node encapsulatingNode)

Specified by:

set in class JSDynamicObject

delete

public boolean delete(Object index,
 boolean isStrict)

Description copied from class: JSDynamicObject

[[Delete]] (P).

Specified by:

delete in class JSDynamicObject

delete

public boolean delete(long index,
 boolean isStrict)

Specified by:

delete in class JSDynamicObject

getOwnPropertyKeys

public List<Object> getOwnPropertyKeys(boolean string,
 boolean symbols)

Description copied from class: JSDynamicObject

GetOwnPropertyKeys (O, type).

Specified by:

getOwnPropertyKeys in class JSDynamicObject

Returns:

a List of the keys of all own properties of that object with the specified types

defineOwnProperty

public boolean defineOwnProperty(Object key,
 PropertyDescriptor desc,
 boolean doThrow)

Description copied from class: JSDynamicObject

[[DefineOwnProperty]] (P, Desc).

Specified by:

defineOwnProperty in class JSDynamicObject

preventExtensions

public boolean preventExtensions(boolean doThrow)

Description copied from class: JSDynamicObject

[[PreventExtensions]] ().

Specified by:

preventExtensions in class JSDynamicObject

isExtensible

public boolean isExtensible()

Description copied from class: JSDynamicObject

[IsExtensible]] ().

Specified by:

isExtensible in class JSDynamicObject

testIntegrityLevel

public boolean testIntegrityLevel(boolean frozen)

Description copied from class: JSDynamicObject

TestIntegrityLevel(O, level).

Overrides:

testIntegrityLevel in class JSDynamicObject

setIntegrityLevel

public boolean setIntegrityLevel(boolean freeze,
 boolean doThrow)

Description copied from class: JSDynamicObject

SetIntegrityLevel(O, level).

Overrides:

setIntegrityLevel in class JSDynamicObject

hasOnlyShapeProperties

public boolean hasOnlyShapeProperties()

Description copied from class: JSDynamicObject

If true, JSDynamicObject.ownPropertyKeys() and JSShape.getPropertyKeyList(Shape, boolean, boolean) enumerate the same keys.

Specified by:

hasOnlyShapeProperties in class JSDynamicObject

getPrototypeOf

public JSDynamicObject getPrototypeOf()

Description copied from class: JSDynamicObject

[[GetPrototypeOf]] ().

Specified by:

getPrototypeOf in class JSDynamicObject

setPrototypeOf

public boolean setPrototypeOf(JSDynamicObject newPrototype)

Description copied from class: JSDynamicObject

[[SetPrototypeOf]] (V).

Specified by:

setPrototypeOf in class JSDynamicObject

getOwnProperty

public PropertyDescriptor getOwnProperty(Object propertyKey)

Description copied from class: JSDynamicObject

[[GetOwnProperty]] (P).

Specified by:

getOwnProperty in class JSDynamicObject

toString

public String toString()

Overrides:

toString in class Object