com.go.tea.parsetree
Class Literal

java.lang.Object
  |
  +--com.go.tea.parsetree.Node
        |
        +--com.go.tea.parsetree.Expression
              |
              +--com.go.tea.parsetree.Literal

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

Direct Known Subclasses:

BooleanLiteral, NullLiteral, NumberLiteral, StringLiteral

public abstract class Literal

extends Expression

A literal is an expression that has a constant value.

Version:

19 , 9/07/00

Author:

Brian S O'Neill

See Also:

Serialized Form

Inner classes inherited from class com.go.tea.parsetree.Expression

Expression.Conversion

Constructor Summary

protected

Literal(SourceInfo info)

Method Summary

java.lang.Object	accept(NodeVisitor visitor) Every subclass of Node must override this method with the following: return visitor.visit(this).
boolean	isValueKnown() Usually returns true, but some literals may have an unknown value if they are converted to another type.

Methods inherited from class com.go.tea.parsetree.Expression

clone, convertTo, convertTo, getConversionChain, getInitialType, getType, getValue, isExceptionPossible, setInitialType, setType

Methods inherited from class com.go.tea.parsetree.Node

getSourceInfo, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Literal

protected Literal(SourceInfo info)

Method Detail

accept

public java.lang.Object accept(NodeVisitor visitor)

Description copied from class: Node

Every subclass of Node must override this method with the following: return visitor.visit(this).

Overrides:

accept in class Expression

Following copied from class: com.go.tea.parsetree.Node

Parameters:

visitor - A visitor of this Node

Returns:

Node The Node returned by the visitor

See Also:

NodeVisitor

isValueKnown

public boolean isValueKnown()

Usually returns true, but some literals may have an unknown value if they are converted to another type.

Overrides:

isValueKnown in class Expression

Following copied from class: com.go.tea.parsetree.Expression

See Also:

Literal