scale.clef.expr
Class SubscriptAddressOp

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.expr.Expression
              scale.clef.expr.SubscriptOp
                  scale.clef.expr.SubscriptAddressOp

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class SubscriptAddressOp
extends SubscriptOp

A class representing an array subscript operation that returns a address.

$Id: SubscriptAddressOp.java,v 1.22 2007-10-04 19:58:06 burrill Exp $

Copyright 2008 by the Scale Compiler Group,
Department of Computer Science
University of Massachusetts,
Amherst MA. 01003, USA
All Rights Reserved.

The result is the address of the array element.

Constructor Summary

SubscriptAddressOp(Type type, Expression array, Vector<Expression> subscripts)

Method Summary

Literal	getConstantValue() Return the constant value of the expression which is an AddressLiteral instance.
Expression	makeRValue() Create a SubscriptValueOp instance from this.
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.expr.SubscriptOp

addIndex, addToIndex, containsDeclaration, equivalent, getArray, getChild, getConstantIndex, getDeclList, getSubscript, getSubscripts, isFortranArray, numChildren, numSubscripts, setArray, setFortranArray

Methods inherited from class scale.clef.expr.Expression

canonical, getCoreType, getDisplayColorHint, getDisplayLabel, getDisplayShapeHint, getPointedToCore, getType, hasTrueFalseResult, isSimpleOp, 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

SubscriptAddressOp

public SubscriptAddressOp(Type type,
                          Expression array,
                          Vector<Expression> subscripts)

Method Detail

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 SubscriptOp

See Also:

Predicate

makeRValue

public Expression makeRValue()

Create a SubscriptValueOp instance from this.

getConstantValue

public Literal getConstantValue()

Return the constant value of the expression which is an AddressLiteral instance.

Overrides:

getConstantValue in class Expression

See Also:

Lattice