io.parsingdata.metal.expression.value

Interface ValueExpression

All Known Implementing Classes:

Add, And, BinaryValueExpression, Cat, Const, Count, CurrentOffset, Div, Elvis, First, Fold, FoldLeft, FoldRight, Last, Len, Mod, Mul, NameRef, Neg, Not, Nth, Offset, Or, Reverse, Self, ShiftLeft, ShiftRight, Sub, TokenRef, UnaryValueExpression

public interface ValueExpression

Interface for all ValueExpression implementations.

A ValueExpression is an expression that is evaluated by executing its eval(Environment, Encoding) method. It yields a list of Value objects encapsulated in OptionalValue objects (to guard against nulls).

As context, it receives the current environment object that describes the parse state as well as the current encoding object that describes the encoding to use when reading data from the input.

Method Summary

Modifier and Type	Method and Description
ImmutableList<OptionalValue>	eval(Environment environment, Encoding encoding)

Method Detail

eval

ImmutableList<OptionalValue> eval(Environment environment,
                                  Encoding encoding)