scale.clef.expr
Class VaStartOp

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.expr.Expression
              scale.clef.expr.VarArgOp
                  scale.clef.expr.VaStartOp

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class VaStartOp
extends VarArgOp

A class which represents the va_start(va_list, parmN) C construct in the Clef AST.

$Id: VaStartOp.java,v 1.25 2005-03-24 13:57:05 burrill Exp $

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

Constructor Summary

VaStartOp(Type type, Expression va_list, FormalDecl pn)

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.
FormalDecl	getParmN() Return the reference parameter of the calling function.
int	numChildren() Return the number of AST children of this node.
protected void	setParmN(FormalDecl pn) Specify the reference parameter of the calling function.
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.expr.VarArgOp

containsDeclaration, getDeclList, getVaList, setVaList

Methods inherited from class scale.clef.expr.Expression

canonical, getConstantValue, 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

VaStartOp

public VaStartOp(Type type,
                 Expression va_list,
                 FormalDecl pn)

Method Detail

equivalent

public boolean equivalent(java.lang.Object exp)

Return true if the two expressions are equivalent.

Overrides:

equivalent in class VarArgOp

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 VarArgOp

See Also:

Predicate

getParmN

public final FormalDecl getParmN()

Return the reference parameter of the calling function.

setParmN

protected final void setParmN(FormalDecl pn)

Specify the reference parameter of the calling function.

getChild

public Node getChild(int i)

Return the specified AST child of this node.

Overrides:

getChild in class VarArgOp

numChildren

public int numChildren()

Return the number of AST children of this node.

Overrides:

numChildren in class VarArgOp