net.sourceforge.czt.animation.eval.flatpred

Class FlatEquals

java.lang.Object

net.sourceforge.czt.animation.eval.flatpred.FlatPred

net.sourceforge.czt.animation.eval.flatpred.FlatEquals

public class FlatEquals
extends FlatPred

FlatEquals implements the a = b predicate.

Field Summary

Fields inherited from class net.sourceforge.czt.animation.eval.flatpred.FlatPred

args_, evalMode_, freeVars_, INDENT, LOG, printer_, solutionsReturned_

Constructor Summary

Constructors

Constructor and Description
FlatEquals(net.sourceforge.czt.z.ast.ZName a, net.sourceforge.czt.z.ast.ZName b)

Method Summary

Modifier and Type	Method and Description
<R> R	accept(net.sourceforge.czt.util.Visitor<R> visitor) Calls visitor.visitPred (preferably) or visitor.visitTerm.
Mode	chooseMode(Envir env) Chooses the mode in which the predicate can be evaluated.
protected net.sourceforge.czt.z.ast.Expr	findSetInfo(net.sourceforge.czt.z.ast.ZName name, Envir env) Tries to find approximate information about the given name.
boolean	inferBounds(Bounds bnds) Copies integer bounds from each arg to the other.
boolean	nextEvaluation() Does the actual evaluation
String	toString() A default implementation of toString.

Methods inherited from class net.sourceforge.czt.animation.eval.flatpred.FlatPred

freeVars, getArgs, getEnvir, getLastArg, getMode, indent, modeAllDefined, modeCollection, modeFunction, modeOneOutput, printArg, printBinOp, printLastArg, printName, printQuant, setMode, startEvaluation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FlatEquals

public FlatEquals(net.sourceforge.czt.z.ast.ZName a,
                  net.sourceforge.czt.z.ast.ZName b)

Method Detail

inferBounds

public boolean inferBounds(Bounds bnds)

Copies integer bounds from each arg to the other.

Overrides:

inferBounds in class FlatPred

Parameters:

bnds - The database of lower and upper bounds for integer variables.

Returns:

true iff the bnds database has been changed.

The default implementation infers nothing and returns false.

chooseMode

public Mode chooseMode(Envir env)

Chooses the mode in which the predicate can be evaluated.

Specified by:

chooseMode in class FlatPred

Returns:

The Mode object, with statistics and an updated environment.

findSetInfo

protected net.sourceforge.czt.z.ast.Expr findSetInfo(net.sourceforge.czt.z.ast.ZName name,
                                                     Envir env)

Tries to find approximate information about the given name.

nextEvaluation

public boolean nextEvaluation()

Does the actual evaluation

Specified by:

nextEvaluation in class FlatPred

Returns:

true iff another solution has been found.

toString

public String toString()

Description copied from class: FlatPred

A default implementation of toString. This returns "FlatXXX(args[0], args[1], ...)".

Overrides:

toString in class FlatPred

accept

public <R> R accept(net.sourceforge.czt.util.Visitor<R> visitor)

Description copied from class: FlatPred

Calls visitor.visitPred (preferably) or visitor.visitTerm. Subclasses that correspond to particular kinds of Pred should override this to call more specific visitXXX methods (and should call super to handle the remaining cases).

Overrides:

accept in class FlatPred