com.google.gwt.dev.js.ast

Class JsNullLiteral

java.lang.Object

com.google.gwt.dev.js.ast.JsNode

com.google.gwt.dev.js.ast.JsExpression

com.google.gwt.dev.js.ast.JsLiteral

com.google.gwt.dev.js.ast.JsValueLiteral

com.google.gwt.dev.js.ast.JsNullLiteral

All Implemented Interfaces:

HasSourceInfo, CanBooleanEval, JsVisitable, Serializable

public final class JsNullLiteral
extends JsValueLiteral

A JavaScript null literal.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static JsNullLiteral	INSTANCE

Method Summary

Modifier and Type	Method and Description
NodeKind	getKind()
boolean	isBooleanFalse()
boolean	isBooleanTrue()
boolean	isDefinitelyNotNull() True if the target expression is definitely not null.
boolean	isDefinitelyNull() True if the target expression is definitely null.
void	traverse(JsVisitor v, JsContext ctx) Causes this object to have the visitor visit itself and its children.

Methods inherited from class com.google.gwt.dev.js.ast.JsValueLiteral

hasSideEffects, isLeaf

Methods inherited from class com.google.gwt.dev.js.ast.JsExpression

makeStmt

Methods inherited from class com.google.gwt.dev.js.ast.JsNode

getSourceInfo, setSourceInfo, toSource, toSource, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode

Field Detail

INSTANCE

public static final JsNullLiteral INSTANCE

Method Detail

getKind

public NodeKind getKind()

Specified by:

getKind in class JsNode

isBooleanFalse

public boolean isBooleanFalse()

isBooleanTrue

public boolean isBooleanTrue()

isDefinitelyNotNull

public boolean isDefinitelyNotNull()

Description copied from class: JsExpression

True if the target expression is definitely not null.

Specified by:

isDefinitelyNotNull in class JsExpression

isDefinitelyNull

public boolean isDefinitelyNull()

Description copied from class: JsExpression

True if the target expression is definitely null.

Specified by:

isDefinitelyNull in class JsExpression

traverse

public void traverse(JsVisitor v,
                     JsContext ctx)

Description copied from interface: JsVisitable

Causes this object to have the visitor visit itself and its children.

Parameters:

v - the visitor that should traverse this node

ctx - the context of an existing traversal