/*
* Copyright (C) 2011 Laurent Caillette
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.novelang.common;
/**
* Defines how an AST nodes behaves regarding tags and identifiers.
*
* @author Laurent Caillette
*/
public enum TagBehavior {
/**
* Don't traverse nor look for a tag inside (default).
*/
NON_TRAVERSABLE,
/**
* Traverse but don't look for a tag inside. Useful for top-level nodes like
* {@link org.novelang.parser.NodeKind#NOVELLA} or {@link org.novelang.parser.NodeKind#OPUS}.
*/
TRAVERSABLE,
/**
* May have a tag and subnodes may have a tag, too.
*/
SCOPE,
/**
* May have a tag but subnodes may not.
*/
TERMINAL
}