scale.clef.stmt
Class LabelStmt

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

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class LabelStmt
extends Statement

This class represents labeled statements.

$Id: LabelStmt.java,v 1.26 2006-06-28 16:39:03 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

LabelStmt(LabelDecl label, Statement stmt)

Method Summary

boolean	containsLoopStmt() Return true if this statement is a loop statement or contains a loop statement.
Node	getChild(int i) Return the specified AST child of this node.
LabelDecl	getLabel() Return the statement's label.
Statement	getStmt() Return the labeled statement.
boolean	hasReturnStmt() Return true if this statement is, or contains, a return statement or a call to exit().
int	numChildren() Return the number of AST children of this node.
int	numTotalStmts() Return the number of statements represented by this statement.
protected void	setLabel(LabelDecl label) Specify the statement's label.
void	setStmt(Statement stmt) Specify the labeled statement.
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

LabelStmt

public LabelStmt(LabelDecl label,
                 Statement stmt)

Parameters:

label - is the statement's label

stmt - is the labeled statement

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

getStmt

public final Statement getStmt()

Return the labeled statement.

getLabel

public final LabelDecl getLabel()

Return the statement's label.

setStmt

public final void setStmt(Statement stmt)

Specify the labeled statement.

setLabel

protected final void setLabel(LabelDecl label)

Specify the statement's label.

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