scale.clef.expr
Class DeleteOp

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.expr.Expression
              scale.clef.expr.MonadicOp
                  scale.clef.expr.DeleteOp

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class DeleteOp
extends MonadicOp

A class which represents the C++ delete operator for heap allocated structures.

$Id: DeleteOp.java,v 1.29 2005-03-24 13:57:03 burrill Exp $

Copyright 2005 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

The result type is void.

Constructor Summary

DeleteOp(Type type, Expression destructor, Expression e)

Method Summary

boolean	equivalent(java.lang.Object exp) Return true if the two expressions are equivalent.
Node	getChild(int i) Return the specified AST child of this node.
Expression	getDestructor() Return the destructor expression that is used.
int	numChildren() Return the number of AST children of this node.
protected void	setDestructor(Expression destructor)
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.expr.MonadicOp

containsDeclaration, getDeclList, getExpr, isSimpleOp, setExpr

Methods inherited from class scale.clef.expr.Expression

canonical, getConstantValue, getCoreType, getDisplayColorHint, getDisplayLabel, getDisplayShapeHint, getPointedToCore, getType, hasTrueFalseResult, setType, toStringSpecial

Methods inherited from class scale.clef.Node

getDecl, getSourceLineNumber, setAnnotationLevel, setReportLevel, setSourceLineNumber, toString, toString, toStringChildren

Methods inherited from class scale.common.Root

addAnnotation, allAnnotations, allMatchingAnnotations, getAnnotation, getDisplayName, getDisplayString, getNodeCount, getNodeID, hasAnnotation, hasEqualAnnotation, hashCode, removeAnnotation, removeAnnotations, toStringAnnotations, toStringClass, trace, trace, trace

Methods inherited from class java.lang.Object

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

Constructor Detail

DeleteOp

public DeleteOp(Type type,
                Expression destructor,
                Expression e)

Method Detail

equivalent

public boolean equivalent(java.lang.Object exp)

Return true if the two expressions are equivalent.

Overrides:

equivalent in class MonadicOp

visit

public void visit(Predicate p)

Description copied from class: Node

Process a node by calling its associated routine. See the "visitor" design pattern in Design Patterns: Elements of Reusable Object-Oriented Software by E. Gamma, et al, Addison Wesley, ISBN 0-201-63361-2.

Each class has a visit(Predicate p) method. For example, in class ABC:

   public void visit(Predicate p)
   {
     p.visitABC(this);
   }
 

and the class that implements Predicate has a method

   public void visitABC(Node n)
   {
     ABC a = (ABC) n;
     ...
   }
 

Thus, the class that implements Predicate can call

   n.visit(this);
 

where n is a Node sub-class without determining which specific sub-class n is. The visit pattern basically avoids implementing a large switch statement or defining different methods in each class for some purpose.

Overrides:

visit in class MonadicOp

See Also:

Predicate

getDestructor

public final Expression getDestructor()

Return the destructor expression that is used.

setDestructor

protected final void setDestructor(Expression destructor)

getChild

public Node getChild(int i)

Return the specified AST child of this node.

Overrides:

getChild in class MonadicOp

numChildren

public int numChildren()

Return the number of AST children of this node.

Overrides:

numChildren in class MonadicOp