/interpreter/tags/at2dist130208/src/edu/vub/at/objects/natives/grammar/NATAbstractGrammar.java
http://ambienttalk.googlecode.com/ · Java · 56 lines · 12 code · 6 blank · 38 comment · 0 complexity · 3ff4a084d2a2f47adee8b534c37d8069 MD5 · raw file
- /**
- * AmbientTalk/2 Project
- * NATAbstractGrammar.java created on 26-jul-2006 at 11:57:00
- * (c) Programming Technology Lab, 2006 - 2007
- * Authors: Tom Van Cutsem & Stijn Mostinckx
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
- package edu.vub.at.objects.natives.grammar;
- import edu.vub.at.exceptions.InterpreterException;
- import edu.vub.at.objects.ATAbstractGrammar;
- import edu.vub.at.objects.ATTable;
- import edu.vub.at.objects.coercion.NativeTypeTags;
- import edu.vub.at.objects.natives.NATByCopy;
- import edu.vub.at.objects.natives.NATTable;
- /**
- * @author tvc
- *
- * NATAbstractGrammar is the common superclass of all native ambienttalk objects
- * that represent abstract grammar parse tree elements. That is, any object that
- * can be returned as part of the AST produced by the native parser.
- */
- public abstract class NATAbstractGrammar extends NATByCopy implements ATAbstractGrammar {
- // This is an empty superclass used only for proper documentation and
- // to identify which native objects can be output by the parser.
-
- // subclasses of NATAbstractGrammar will override meta_eval and meta_quote as appropriate,
- // except for the literal grammar elements which can inherit the self-evaluating behaviour of NATNil.
-
- public ATTable meta_typeTags() throws InterpreterException {
- return NATTable.of(NativeTypeTags._ABSTRACTGRAMMAR_, NativeTypeTags._ISOLATE_);
- }
-
- }