Class OptionalChainNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.js.nodes.JavaScriptBaseNode

com.oracle.truffle.js.nodes.JavaScriptNode

com.oracle.truffle.js.nodes.access.OptionalChainNode

All Implemented Interfaces:

com.oracle.truffle.api.instrumentation.InstrumentableNode, com.oracle.truffle.api.nodes.NodeInterface, Cloneable

public final class OptionalChainNode
extends JavaScriptNode

Wrapper node for an optional chain that returns the result (usually undefined) on short circuit.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	OptionalChainNode.OptionalTargetableNode
static final class	OptionalChainNode.ShortCircuitException
static final class	OptionalChainNode.ShortCircuitNode	Evaluates an optional expression and if its value is null or undefined, jumps out of the short-circuiting expression to the parent OptionalChainNode.
static final class	OptionalChainNode.ShortCircuitTargetableNode	Evaluates an optional expression and if its value is null or undefined, jumps out of the short-circuiting expression to the parent OptionalChainNode.

Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.nodes.Node.Child, com.oracle.truffle.api.nodes.Node.Children

Nested classes/interfaces inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

com.oracle.truffle.api.instrumentation.InstrumentableNode.WrapperNode

Field Summary

Fields inherited from class com.oracle.truffle.js.nodes.JavaScriptNode

INTERMEDIATE_VALUE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	OptionalChainNode(JavaScriptNode chainNode, Object result)

Method Summary

Modifier and Type	Method	Description
protected JavaScriptNode	copyUninitialized(Set<Class<? extends com.oracle.truffle.api.instrumentation.Tag>> materializedTags)
static JavaScriptNode	createShortCircuit(JavaScriptNode expressionNode)
static JavaScriptNode	createTarget(JavaScriptNode chainNode)
Object	execute(com.oracle.truffle.api.frame.VirtualFrame frame)	Executes this node using the specified context and frame and returns the result value.
double	executeDouble(com.oracle.truffle.api.frame.VirtualFrame frame)	Like JavaScriptNode.execute(VirtualFrame) except that it tries to convert the result value to a double.
int	executeInt(com.oracle.truffle.api.frame.VirtualFrame frame)	Like JavaScriptNode.execute(VirtualFrame) except that it tries to convert the result value to an int.
void	executeVoid(com.oracle.truffle.api.frame.VirtualFrame frame)	Like JavaScriptNode.execute(VirtualFrame) except that it throws away the result.
JavaScriptNode	getAccessNode()

Methods inherited from class com.oracle.truffle.js.nodes.JavaScriptNode

addCallTag, addExpressionTag, addRootBodyTag, addStatementTag, cloneUninitialized, cloneUninitialized, copy, createWrapper, executeBoolean, expressionToString, findBlockScopeNode, getSourceSection, hasSourceSection, hasTag, isInstrumentable, isResultAlwaysOfType, onReplace, setSourceSection, setSourceSection, toString, transferSourceSection, transferSourceSectionAddExpressionTag, transferSourceSectionAndTags

Methods inherited from class com.oracle.truffle.js.nodes.JavaScriptBaseNode

getJSContext, getLanguage, getLanguageOptions, getRealm, hasOverloadedOperators, reportLoopCount, reportLoopCount

Methods inherited from class com.oracle.truffle.api.nodes.Node

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

createProbe, findNearestNodeAt, findNearestNodeAt, findProbe, getNodeObject, materializeInstrumentableNodes

Constructor Details

OptionalChainNode

protected OptionalChainNode(JavaScriptNode chainNode,
 Object result)

Method Details

createTarget

public static JavaScriptNode createTarget(JavaScriptNode chainNode)

createShortCircuit

public static JavaScriptNode createShortCircuit(JavaScriptNode expressionNode)

execute

public Object execute(com.oracle.truffle.api.frame.VirtualFrame frame)

Description copied from class: JavaScriptNode

Executes this node using the specified context and frame and returns the result value.

Specified by:

execute in class JavaScriptNode

Parameters:

frame - the frame of the currently executing guest language method

Returns:

the value of the execution

executeVoid

public void executeVoid(com.oracle.truffle.api.frame.VirtualFrame frame)

Description copied from class: JavaScriptNode

Like JavaScriptNode.execute(VirtualFrame) except that it throws away the result. A node can override this method if it has a better way to execute without producing a value.

Overrides:

executeVoid in class JavaScriptNode

Parameters:

frame - the frame of the currently executing guest language method

executeInt

public int executeInt(com.oracle.truffle.api.frame.VirtualFrame frame)
               throws com.oracle.truffle.api.nodes.UnexpectedResultException

Description copied from class: JavaScriptNode

Like JavaScriptNode.execute(VirtualFrame) except that it tries to convert the result value to an int. A node can override this method if it has a better way to producing a value of type int.

Overrides:

executeInt in class JavaScriptNode

Parameters:

frame - the frame of the currently executing guest language method

Returns:

the value of the execution as an int

Throws:

com.oracle.truffle.api.nodes.UnexpectedResultException - if a loss-free conversion of the result to int is not possible

executeDouble

public double executeDouble(com.oracle.truffle.api.frame.VirtualFrame frame)
                     throws com.oracle.truffle.api.nodes.UnexpectedResultException

Description copied from class: JavaScriptNode

Like JavaScriptNode.execute(VirtualFrame) except that it tries to convert the result value to a double. A node can override this method if it has a better way to producing a value of type double.

Overrides:

executeDouble in class JavaScriptNode

Parameters:

frame - the frame of the currently executing guest language method

Returns:

the value of the execution as a double

Throws:

com.oracle.truffle.api.nodes.UnexpectedResultException - if a loss-free conversion of the result to double is not possible

copyUninitialized

protected JavaScriptNode copyUninitialized(Set<Class<? extends com.oracle.truffle.api.instrumentation.Tag>> materializedTags)

Overrides:

copyUninitialized in class JavaScriptNode

getAccessNode

public JavaScriptNode getAccessNode()