com.wewebu.expression.language

Class OwExprNullLiteral

java.lang.Object

com.wewebu.expression.language.OwExprExpression

com.wewebu.expression.language.OwExprLiteral

com.wewebu.expression.language.OwExprNullLiteral

All Implemented Interfaces:

OwExprPrimaryPrefix

public class OwExprNullLiteral
extends OwExprLiteral

A fixed reserved word null expression :
a!=null

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Field Summary

Fields inherited from class com.wewebu.expression.language.OwExprLiteral

m_symbol

Fields inherited from class com.wewebu.expression.language.OwExprExpression

m_errorTable, m_symbolTable, m_typeError

Method Summary

Methods

Modifier and Type	Method and Description
static OwExprNullLiteral	instance(OwExprSymbolTable symbolTable_p, OwExprErrorTable errorTable_p) Single symbol literal creator.

Methods inherited from class com.wewebu.expression.language.OwExprLiteral

evaluate, expression, getValue, regressToFunction, regressToPorperty, regressToScope, symbolInstance, toString, type

Methods inherited from class com.wewebu.expression.language.OwExprExpression

errCount, evaluate, evaluate, getErrorTable, getSymbol, getSymbolTable, hasErrors, initType, symbolsVisibleInScopes

Methods inherited from class java.lang.Object

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

Method Detail

instance

public static final OwExprNullLiteral instance(OwExprSymbolTable symbolTable_p,
                         OwExprErrorTable errorTable_p)
                                        throws ParseException

Single symbol literal creator. This method will return instances of OwExprNullLiteral based on the a single symbol instance associated with the null reserved word String image

Parameters:

symbolTable_p - global symbol table

errorTable_p - global error table

Returns:

a single symbol based literal instance creator.

Throws:

ParseException