Package org.apache.sling.scripting.sightly.impl.compiler.optimization.reduce

Class ConstantFolding

java.lang.Object

org.apache.sling.scripting.sightly.impl.compiler.visitor.UniformVisitor

org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor<EvalResult>

org.apache.sling.scripting.sightly.impl.compiler.optimization.reduce.ConstantFolding

All Implemented Interfaces:

CommandVisitor, EmitterVisitor

public final class ConstantFolding
extends TrackingVisitor<EvalResult>
implements EmitterVisitor

Optimization which evaluates constant expressions during compilation-time

Field Summary

Fields inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor

tracker

Method Summary

Modifier and Type	Method	Description
protected EvalResult	assignDefault(Command command)
PushStream	getOutputStream()	Get the output stream
protected void	onCommand(Command command)
static StreamTransformer	transformer()
void	visit(VariableBinding.Start variableBindingStart)	Process a VariableBinding.Start command.

Methods inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.TrackingVisitor

visit, visit, visit

Methods inherited from class org.apache.sling.scripting.sightly.impl.compiler.visitor.UniformVisitor

visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.sling.scripting.sightly.compiler.commands.CommandVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Method Detail

transformer

public static StreamTransformer transformer()

visit

public void visit(VariableBinding.Start variableBindingStart)

Description copied from interface: CommandVisitor

Process a VariableBinding.Start command.

Specified by:

visit in interface CommandVisitor

Overrides:

visit in class TrackingVisitor<EvalResult>

Parameters:

variableBindingStart - the command

assignDefault

protected EvalResult assignDefault(Command command)

Specified by:

assignDefault in class TrackingVisitor<EvalResult>

onCommand

protected void onCommand(Command command)

Specified by:

onCommand in class UniformVisitor

getOutputStream

public PushStream getOutputStream()

Description copied from interface: EmitterVisitor

Get the output stream

Specified by:

getOutputStream in interface EmitterVisitor

Returns:

the output stream of this visitor