io.parsingdata.metal.expression

Interface Expression

All Known Subinterfaces:

LogicalExpression

All Known Implementing Classes:

And, BinaryLogicalExpression, ComparisonExpression, Eq, EqNum, EqStr, GtNum, LtNum, Not, Or, True, UnaryLogicalExpression

public interface Expression

Interface for all Expression implementations.

An Expression is evaluated by calling the eval(Environment, Encoding) method. Given an Environment and an Encoding, the evaluation either succeeds or fails. Main use of expressions is to define predicates that are evaluated during parsing.

See Also:

Def, Pre, While

Method Summary

Modifier and Type	Method and Description
boolean	eval(Environment environment, Encoding encoding)

Method Detail

eval

boolean eval(Environment environment,
             Encoding encoding)