X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Fedu%2Fberkeley%2Fsbp%2FElement.java;h=3622aea9e0c1cccb30c7d6af16066a6072de3973;hb=6ff6d681e214e91ca3fa5afdff60a0fb88227404;hp=4ccde61eb49ecb9cf23c164c9f013cb5c7c8a0ce;hpb=0e17670bcfa7b0fe8eb3a2cac81f4b080a09fc98;p=sbp.git diff --git a/src/edu/berkeley/sbp/Element.java b/src/edu/berkeley/sbp/Element.java index 4ccde61..3622aea 100644 --- a/src/edu/berkeley/sbp/Element.java +++ b/src/edu/berkeley/sbp/Element.java @@ -1,3 +1,5 @@ +// Copyright 2006 all rights reserved; see LICENSE file for BSD-style license + package edu.berkeley.sbp; import edu.berkeley.sbp.util.*; import edu.berkeley.sbp.*; @@ -8,7 +10,7 @@ import java.lang.reflect.*; import java.lang.ref.*; /** the root superclass for all components of the grammar (terminals, nonterminals, literals, etc) */ -public abstract class Element { +public abstract class Element implements SequenceOrElement { /** sorry, you can't make up new, custom elements */ Element() { } @@ -16,6 +18,6 @@ public abstract class Element { abstract StringBuffer toString(StringBuffer sb); /** returns the Forest resulting from matching this element against the empty string */ - Forest epsilonForm() { throw new Error("element " + this + " has no epsilon form"); } + Forest epsilonForm(Input.Region loc) { throw new Error("element " + this + " has no epsilon form"); } }