scale.clef.stmt
Class CaseStmt

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.stmt.Statement
              scale.clef.stmt.CaseStmt

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class CaseStmt
extends Statement

This class represents a M3 case statement.

$Id: CaseStmt.java,v 1.29 2006-06-28 16:39:01 burrill Exp $

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

Constructor Summary

CaseStmt(Expression exp)

CaseStmt(Expression exp, Vector<AltCase> a)

Method Summary

boolean	containsLoopStmt() Return true if this statement is a loop statement or contains a loop statement.
AltCase	getAlt(int i) Return the AltCase.
Node	getChild(int i) Return the specified AST child of this node.
Expression	getExpr()
boolean	hasReturnStmt() Return true if this statement is, or contains, a return statement or a call to exit().
int	numAlts() Return the number of AltCase objects.
int	numChildren() Return the number of AST children of this node.
int	numTotalStmts() Return the number of statements represented by this statement.
protected void	setAlts(Vector<AltCase> alts)
protected void	setExpr(Expression expr)
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.stmt.Statement

dump, getDisplayColorHint, getDisplayLabel, getDisplayShapeHint, getPragma, getSourceLineNumber, setPragma, setSourceLineNumber

Methods inherited from class scale.clef.Node

getCoreType, getDecl, getType, setAnnotationLevel, setReportLevel, toString, toString, toStringChildren, toStringSpecial

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

CaseStmt

public CaseStmt(Expression exp)

CaseStmt

public CaseStmt(Expression exp,
                Vector<AltCase> a)

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 Statement

See Also:

Predicate

getExpr

public final Expression getExpr()

numAlts

public final int numAlts()

Return the number of AltCase objects.

getAlt

public AltCase getAlt(int i)

Return the AltCase.

setExpr

protected final void setExpr(Expression expr)

setAlts

protected final void setAlts(Vector<AltCase> alts)

getChild

public Node getChild(int i)

Return the specified AST child of this node.

Overrides:

getChild in class Node

numChildren

public int numChildren()

Return the number of AST children of this node.

Overrides:

numChildren in class Node

hasReturnStmt

public boolean hasReturnStmt()

Return true if this statement is, or contains, a return statement or a call to exit().

Overrides:

hasReturnStmt in class Statement

numTotalStmts

public int numTotalStmts()

Return the number of statements represented by this statement. Most statements return 1. A block statement returns sum of the number of statements in each statement in the block.

Overrides:

numTotalStmts in class Statement

containsLoopStmt

public boolean containsLoopStmt()

Return true if this statement is a loop statement or contains a loop statement.

Overrides:

containsLoopStmt in class Statement