org.teatrove.tea.parsetree
Class NumberLiteral

java.lang.Object
  org.teatrove.tea.parsetree.Node
      org.teatrove.tea.parsetree.Expression
          org.teatrove.tea.parsetree.Literal
              org.teatrove.tea.parsetree.NumberLiteral

All Implemented Interfaces:

Serializable, Cloneable

public class NumberLiteral
extends Literal

Base class for all Literals that have a numeric type.

Author:

Brian S O'Neill

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.teatrove.tea.parsetree.Expression

Expression.Conversion

Constructor Summary

NumberLiteral(SourceInfo info, double value)

NumberLiteral(SourceInfo info, float value)

NumberLiteral(SourceInfo info, int value)

NumberLiteral(SourceInfo info, long value)

NumberLiteral(SourceInfo info, Number value)

Method Summary

Object	accept(NodeVisitor visitor) Every subclass of Node must override this method with the following: return visitor.visit(this).
void	convertTo(Type type, boolean preferCast) Applies a type conversion to this expression which is chained to all previous conversions.
Object	getValue() Most expressions can't generate a value at compile-time, so this method simply returns null.
boolean	isValueKnown() Value is known only if type is a number or can be assigned a number.
void	setType(Type type) Sets the type of this expression, clearing the conversion chain.

Methods inherited from class org.teatrove.tea.parsetree.Expression

clone, convertTo, forceConversion, getConversionChain, getInitialType, getType, isExceptionPossible, setInitialType

Methods inherited from class org.teatrove.tea.parsetree.Node

getSourceInfo, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberLiteral

public NumberLiteral(SourceInfo info,
                     Number value)

NumberLiteral

public NumberLiteral(SourceInfo info,
                     int value)

NumberLiteral

public NumberLiteral(SourceInfo info,
                     float value)

NumberLiteral

public NumberLiteral(SourceInfo info,
                     long value)

NumberLiteral

public NumberLiteral(SourceInfo info,
                     double value)

Method Detail

accept

public 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 Literal

Parameters:

visitor - A visitor of this Node

Returns:

Node The Node returned by the visitor

See Also:

NodeVisitor

convertTo

public void convertTo(Type type,
                      boolean preferCast)

Description copied from class: Expression

Applies a type conversion to this expression which is chained to all previous conversions.

Overrides:

convertTo in class Expression

Parameters:

type - the type to convert to.

preferCast - a hint that the conversion should be performed by a type cast operation, by default is true.

setType

public void setType(Type type)

Description copied from class: Expression

Sets the type of this expression, clearing the conversion chain.

Overrides:

setType in class Expression

getValue

public Object getValue()

Description copied from class: Expression

Most expressions can't generate a value at compile-time, so this method simply returns null. Call isValueKnown to check if the expression's value is known at compile-time.

Overrides:

getValue in class Expression

isValueKnown

public boolean isValueKnown()

Value is known only if type is a number or can be assigned a number.

Overrides:

isValueKnown in class Literal

See Also:

Literal