scale.clef.expr
Class TernaryOp

java.lang.Object
  scale.common.Root
      scale.clef.Node
          scale.clef.expr.Expression
              scale.clef.expr.TernaryOp

All Implemented Interfaces:

AnnotationInterface, DisplayNode

Direct Known Subclasses:

ExpressionIfOp, SubstringOp

public class TernaryOp
extends Expression

A class which represents ternary operators.

$Id: TernaryOp.java,v 1.11 2007-08-28 17:58:21 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

TernaryOp(Type type, Expression e1, Expression e2, Expression e3)

Method Summary

boolean	containsDeclaration(Declaration decl) Return true if this expression contains a reference to the variable.
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.
void	getDeclList(java.util.AbstractCollection<Declaration> varList) Add all declarations referenced in this expression to the collection.
Expression	getExpr1() Return the left argument.
Expression	getExpr2() Return the middle argument.
Expression	getExpr3() Return the right argument.
boolean	isSimpleOp() Return true if compilation of this expression will not result in the generation of a CFG node.
int	numChildren() Return the number of AST children of this node.
protected void	setExpr1(Expression expr1) Specify the left argument.
protected void	setExpr2(Expression expr2) Specify the middle argument.
protected void	setExpr3(Expression expr3) Specify the right argument.
void	visit(Predicate p) Process a node by calling its associated routine.

Methods inherited from class scale.clef.expr.Expression

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

TernaryOp

public TernaryOp(Type type,
                 Expression e1,
                 Expression e2,
                 Expression e3)

Method Detail

equivalent

public boolean equivalent(java.lang.Object exp)

Return true if the two expressions are equivalent.

Overrides:

equivalent in class Expression

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 Expression

See Also:

Predicate

getExpr1

public final Expression getExpr1()

Return the left argument.

getExpr2

public final Expression getExpr2()

Return the middle argument.

getExpr3

public final Expression getExpr3()

Return the right argument.

setExpr1

protected final void setExpr1(Expression expr1)

Specify the left argument.

setExpr2

protected final void setExpr2(Expression expr2)

Specify the middle argument.

setExpr3

protected final void setExpr3(Expression expr3)

Specify the right argument.

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

isSimpleOp

public boolean isSimpleOp()

Description copied from class: Expression

Return true if compilation of this expression will not result in the generation of a CFG node. For example, (a && b) may require a branch to represent and i++ requires a store.

Overrides:

isSimpleOp in class Expression

containsDeclaration

public boolean containsDeclaration(Declaration decl)

Return true if this expression contains a reference to the variable.

Overrides:

containsDeclaration in class Expression

See Also:

LoadExpr.setUseOriginal(boolean)

getDeclList

public void getDeclList(java.util.AbstractCollection<Declaration> varList)

Description copied from class: Expression

Add all declarations referenced in this expression to the collection.

Specified by:

getDeclList in class Expression