scale.clef.stmt
Class IfThenElseStmt

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.stmt.Statement
              scale.clef.stmt.IfStmt
                  scale.clef.stmt.IfThenElseStmt

All Implemented Interfaces:

AnnotationInterface, DisplayNode

public class IfThenElseStmt
extends IfStmt

This class represents the C-style if statement.

$Id: IfThenElseStmt.java,v 1.27 2006-09-22 19:48:33 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

IfThenElseStmt(Expression e, Statement thenStmt, Statement elseStmt)

Method Summary

boolean	containsLoopStmt() Return true if this statement is a loop statement or contains a loop statement.
void	dump(java.lang.String indents, java.io.PrintStream out)
Node	getChild(int i) Return the specified AST child of this node.
Statement	getElseStmt() Return the "else" clause.
Statement	getThenStmt() Return the "then" clause.
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	setElseStmt(Statement elseStmt) Specify the "else" clause.
protected void	setThenStmt(Statement thenStmt) Specify the "then" clause.
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.stmt.IfStmt

getExpr, setExpr

Methods inherited from class scale.clef.stmt.Statement

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

IfThenElseStmt

public IfThenElseStmt(Expression e,
                      Statement thenStmt,
                      Statement elseStmt)

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 IfStmt

See Also:

Predicate

getThenStmt

public final Statement getThenStmt()

Return the "then" clause.

getElseStmt

public final Statement getElseStmt()

Return the "else" clause.

setThenStmt

protected final void setThenStmt(Statement thenStmt)

Specify the "then" clause.

setElseStmt

protected final void setElseStmt(Statement elseStmt)

Specify the "else" clause.

getChild

public Node getChild(int i)

Return the specified AST child of this node.

Overrides:

getChild in class IfStmt

numChildren

public int numChildren()

Return the number of AST children of this node.

Overrides:

numChildren in class IfStmt

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

dump

public void dump(java.lang.String indents,
                 java.io.PrintStream out)

Overrides:

dump in class Statement