io.parsingdata.metal.expression.value.reference

Class Offset

java.lang.Object

io.parsingdata.metal.expression.value.UnaryValueExpression

io.parsingdata.metal.expression.value.reference.Offset

All Implemented Interfaces:

ValueExpression

public class Offset
extends UnaryValueExpression

A ValueExpression that represents the offset of the OptionalValues returned by evaluating its operand.

Only ParseValues have an offset, since they originate in the input. If a result does not have an offset (such as the Values returned by Const), empty is returned.

Field Summary

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

operand

Constructor Summary

Constructors

Constructor and Description
Offset(ValueExpression operand)

Method Summary

Modifier and Type	Method and Description
OptionalValue	eval(Value value, Environment environment, Encoding encoding)

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

eval, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Offset

public Offset(ValueExpression operand)

Method Detail

eval

public OptionalValue eval(Value value,
                          Environment environment,
                          Encoding encoding)

Specified by:

eval in class UnaryValueExpression