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 and 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