weka.core.expressionlanguage.core

Interface Macro

All Known Implementing Classes:

IfElseMacro, InstancesHelper, JavaMacro

public interface Macro

Interface for compile time macros to enable meta programming

Because macros have direct access to the AST (abstract syntax tree) they can rewrite it as they please.

Version:

$Revision: 1000 $

Author:

Benjamin Weber ( benweber at student dot ethz dot ch )

Method Summary

Modifier and Type	Method and Description
Node	evaluate(Node... nodes) Applies a macro to a set of parameter nodes.

Method Detail

evaluate

Node evaluate(Node... nodes)
       throws SemanticException

Applies a macro to a set of parameter nodes.

Parameters:

nodes - the nodes this macro should be applied to

Returns:

an AST node returned by the macro

Throws:

SemanticException