edu.mit.ai.psg.jeva
Class JNEParenthesizedExpression

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.JNEParenthesizedExpression

public class JNEParenthesizedExpression

extends ExpressionNode

Jeva parse Node for (parenthesized expressions): This node exists to mark the beginning and end of the parenthesized expression so it can be reproduced in text (the "(" and ")" are not part of the expression they contain).

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

children, id, parent

Method Summary

boolean	computeIsConstant(IEnv env) Compute whether this expression is a constant (nodes should not call this method directly).
IClass	computeType(IEnv env) Compute the static type of the expression (nodes should not call this method directly).
Object	eval(IEnv env) Evaluate this expression (nodes should not call this method directly).
IExpressionNode	getExpression()
Object	jjtAccept(IJevaVisitor visitor, Object data) Accept a visitor.

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, notVerified, print, print, printSpecialTokens, printToken, printToString, printToString, removeChild, removeChildTokens, replaceChild, replaceChild, setBeginToken, setEndToken, shouldNotHappen, shouldNotHappen, shouldNotHappen, 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)

Description copied from interface: IJevaNode

Accept a visitor. For visitor design pattern: jjtAccept must simply

  return visitor.visit(this, data);  

which dispatches on the type of this to appropriate method of visitor

Overrides:

jjtAccept in class JevaNode

getExpression

public IExpressionNode getExpression()

computeType

public IClass computeType(IEnv env)
                   throws VerifyingException

Description copied from class: ExpressionNode

Compute the static type of the expression (nodes should not call this method directly). Called by getType.

Overrides:

computeType in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Returns:

the IClass of the static type.

Throws:

VerifyingException - if expression is illegal

See Also:

EvalMethods.getType(IExpressionNode, IEnv)

computeIsConstant

public boolean computeIsConstant(IEnv env)
                          throws VerifyingException

Description copied from class: ExpressionNode

Compute whether this expression is a constant (nodes should not call this method directly). Called by the isConstant method.

Overrides:

computeIsConstant in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Throws:

VerifyingException - if expression is illegal.

See Also:

ExpressionNode.isConstant(edu.mit.ai.psg.jeva.IEnv), EvalMethods.isConstant(IExpressionNode, IEnv)

eval

public Object eval(IEnv env)
            throws ThrowException

Description copied from class: ExpressionNode

Evaluate this expression (nodes should not call this method directly). Called by the getValue method.

Overrides:

eval in class ExpressionNode

Tags copied from class: ExpressionNode

Parameters:

env - environment of name bindings, etc.

Throws:

ThrowException - if abruptly completed with an exception

See Also:

ExpressionNode.getValue(edu.mit.ai.psg.jeva.IEnv), EvalMethods.eval(IExpressionNode, IEnv)