io.parsingdata.metal.expression.value

Class FoldRight

java.lang.Object

io.parsingdata.metal.expression.value.Fold

io.parsingdata.metal.expression.value.FoldRight

All Implemented Interfaces:

ValueExpression

public class FoldRight
extends Fold

A ValueExpression implementation of the FoldRight operation.

FoldRight differs from FoldLeft in that the reduce operation is applied from right to left (i.e., starting at the bottom).

See Also:

FoldLeft

Field Summary

Fields inherited from class io.parsingdata.metal.expression.value.Fold

initial, reducer, values

Constructor Summary

Constructors

Constructor and Description
FoldRight(ValueExpression values, Reducer reducer, ValueExpression initial)

Method Summary

Modifier and Type	Method and Description
protected ImmutableList<OptionalValue>	prepareValues(ImmutableList<OptionalValue> values)
protected ValueExpression	reduce(Reducer reducer, Value head, Value tail)

Methods inherited from class io.parsingdata.metal.expression.value.Fold

eval

Methods inherited from class java.lang.Object

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

Constructor Detail

FoldRight

public FoldRight(ValueExpression values,
                 Reducer reducer,
                 ValueExpression initial)

Method Detail

prepareValues

protected ImmutableList<OptionalValue> prepareValues(ImmutableList<OptionalValue> values)

Specified by:

prepareValues in class Fold

reduce

protected ValueExpression reduce(Reducer reducer,
                                 Value head,
                                 Value tail)

Specified by:

reduce in class Fold