Package ptolemy.data.expr

Class ASTPtUnaryNode

java.lang.Object

ptolemy.data.expr.ASTPtRootNode

ptolemy.data.expr.ASTPtUnaryNode

All Implemented Interfaces:

java.lang.Cloneable, Node

public class ASTPtUnaryNode
extends ASTPtRootNode

The parse tree created from the expression string consists of a hierarchy of node objects. This class represents unary operator(!, -, ~) nodes in the parse tree.

Since:

Ptolemy II 0.2

Version:

$Id$

Author:

Neil Smyth

See Also:

ASTPtRootNode, PtParser, Token

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Yellow (nsmyth)

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	_isBitwiseNot
protected boolean	_isMinus
protected boolean	_isNot
protected Token	_lexicalToken

Fields inherited from class ptolemy.data.expr.ASTPtRootNode

_children, _id, _isConstant, _parent, _ptToken, _ptType

Constructor Summary

Constructors

Constructor	Description
ASTPtUnaryNode(int id)
ASTPtUnaryNode(PtParser p, int id)

Method Summary

Modifier and Type	Method	Description
Token	getOperator()	Return the token that represents the operation of this node.
boolean	isBitwiseNot()	Return true if this node represents the bitwise negation of its child.
boolean	isCongruent(ASTPtRootNode node, java.util.Map renaming)	Return true if this node is (hierarchically) congruent to the given node, under the given renaming of bound identifiers.
boolean	isMinus()	Return true if this node represents the additive inverse of its child.
boolean	isNot()	Return true if this node represents the boolean negation of its child.
void	visit(ParseTreeVisitor visitor)	Traverse this node with the given visitor.

Methods inherited from class ptolemy.data.expr.ASTPtRootNode

clone, displayParseTree, evaluateParseTree, getToken, getType, isConstant, isEvaluated, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, setConstant, setToken, setType, toString, toString

Methods inherited from class java.lang.Object

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

Field Detail

_isMinus

protected boolean _isMinus

_isNot

protected boolean _isNot

_isBitwiseNot

protected boolean _isBitwiseNot

_lexicalToken

protected Token _lexicalToken

Constructor Detail

ASTPtUnaryNode

public ASTPtUnaryNode(int id)

ASTPtUnaryNode

public ASTPtUnaryNode(PtParser p,
                      int id)

Method Detail

getOperator

public Token getOperator()

Return the token that represents the operation of this node.

Returns:

the token that represents the operation of this node.

isBitwiseNot

public boolean isBitwiseNot()

Return true if this node represents the bitwise negation of its child.

Returns:

true if this node represents the bitwise negation of its child.

isCongruent

public boolean isCongruent(ASTPtRootNode node,
                           java.util.Map renaming)

Return true if this node is (hierarchically) congruent to the given node, under the given renaming of bound identifiers. Derived classes should extend this method to add additional necessary congruency checks.

Overrides:

isCongruent in class ASTPtRootNode

Parameters:

node - The node to compare to.

renaming - A map from String to String that gives a renaming from identifiers in this node to identifiers in the given node.

Returns:

True if this node is congruent.

isMinus

public boolean isMinus()

Return true if this node represents the additive inverse of its child.

Returns:

true if this node represents the additive inverse of its child.

isNot

public boolean isNot()

Return true if this node represents the boolean negation of its child.

Returns:

true if this node represents the boolean negation of its child.

visit

public void visit(ParseTreeVisitor visitor)
           throws IllegalActionException

Traverse this node with the given visitor.

Overrides:

visit in class ASTPtRootNode

Parameters:

visitor - The visitor.

Throws:

IllegalActionException - Always thrown in this base class the visit() method is not implemented here.