JevaES/Jexa Tools 1999.02.28: Class JNELiteralExpression

Overview

Package

Class

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: INNER | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

edu.mit.ai.psg.jeva
Class JNELiteralExpression

java.lang.Object
  |
  +--edu.mit.ai.psg.jeva.SimpleNode
        |
        +--edu.mit.ai.psg.jeva.JevaNode
              |
              +--edu.mit.ai.psg.jeva.ExpressionNode
                    |
                    +--edu.mit.ai.psg.jeva.JNELiteralExpression

public class JNELiteralExpression
extends ExpressionNode

Jeva parse node for literal expressions (1, 3.14, "Hi", etc.)

Author:: CarlManning, caroma@ai.mit.edu
Copyright (c) 1997, 1998 Massachusetts Institute of Technology

Fields inherited from class edu.mit.ai.psg.jeva.SimpleNode

children,  
id,  
parent

Method Summary
`boolean`	`computeIsConstant(IEnv env)`
`IClass`	`computeType(IEnv env)`
`Object`	`eval(IEnv env)` This should never be called.
`Object`	`jjtAccept(IJevaVisitor visitor, Object data)`
`void`	`setValue(Object val, IClass literalType)`

Methods inherited from class edu.mit.ai.psg.jeva.ExpressionNode

getType, 
getType, 
getValue, 
isConstant

Methods inherited from class edu.mit.ai.psg.jeva.JevaNode

checkInsertionPoint, 
find2ndTokenBeforeEndBody, 
findChildIndex, 
findPrecedingToken, 
findTokenBeforeChild, 
findTokenBeforeChild, 
findTokenBeforeEnd, 
getBeginToken, 
getEndToken, 
insertChildTokens, 
insertNewChildAfter, 
insertNewChildAt, 
insertNewChildBefore, 
jnGetChild, 
jnGetParent, 
print, 
print, 
printToken, 
printToString, 
printToString, 
removeChild, 
removeChildTokens, 
replaceChild, 
replaceChild, 
setBeginToken, 
setEndToken, 
updateEndTokens, 
updateEndTokensPriorChild, 
updateEndTokensPriorNode, 
updateEndTokensPriorNode

Methods inherited from class edu.mit.ai.psg.jeva.SimpleNode

dump, 
jjtAddChild, 
jjtClose, 
jjtGetChild, 
jjtGetNumChildren, 
jjtGetParent, 
jjtOpen, 
jjtSetParent, 
toString, 
toString

Methods inherited from class java.lang.Object

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

Method Detail

jjtAccept

public Object jjtAccept(IJevaVisitor visitor,
                        Object data)

Overrides:: jjtAccept in class JevaNode

setValue

public void setValue(Object val,
                     IClass literalType)

computeType

public IClass computeType(IEnv env)

Overrides:: computeType in class ExpressionNode

computeIsConstant

public boolean computeIsConstant(IEnv env)

Overrides:: computeIsConstant in class ExpressionNode

eval

public Object eval(IEnv env)

This should never be called. EvalMethods.eval calls getValue, which calls eval only if it isn't a constant already computed. Literals are computed at parse time, so they are always computed.