/interpreter/tags/at2dist090708/src/edu/vub/at/exceptions/XIllegalUnquote.java

 1/**
 2 * AmbientTalk/2 Project
 3 * XIllegalUnquote.java created on 28-jul-2006 at 16:48:23
 4 * (c) Programming Technology Lab, 2006 - 2007
 5 * Authors: Tom Van Cutsem & Stijn Mostinckx
 6 * 
 7 * Permission is hereby granted, free of charge, to any person
 8 * obtaining a copy of this software and associated documentation
 9 * files (the "Software"), to deal in the Software without
10 * restriction, including without limitation the rights to use,
11 * copy, modify, merge, publish, distribute, sublicense, and/or
12 * sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following
14 * conditions:
15 *
16 * The above copyright notice and this permission notice shall be
17 * included in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
27 */
28package edu.vub.at.exceptions;
29
30import edu.vub.at.objects.ATTypeTag;
31import edu.vub.at.objects.coercion.NativeTypeTags;
32import edu.vub.at.objects.grammar.ATExpression;
33
34/**
35 * An XIllegalUnquote exception is raised when an unquotation is discovered in a non-quoted 
36 * piece of source code. In other words, this exception is raised when trying to evaluate an
37 * {@link edu.vub.at.objects.natives.grammar.AGUnquote} element rather than quoting it.
38 * 
39 * @author tvc
40 */
41public final class XIllegalUnquote extends InterpreterException {
42
43	private static final long serialVersionUID = -396801039714856213L;
44
45	private static final String _MESSAGE_ = "Unquoted expression in non-quoted expression";
46	
47	private final ATExpression unquotation_;
48	
49	/**
50	 * Constructor reporting that an attempt was made to evaluate an unquoted piece of source code
51	 * @param unquotation the unquoted source code being evaluated
52	 * 
53	 * @see edu.vub.at.objects.natives.grammar.AGUnquote#meta_eval(ATContext)
54	 * @see edu.vub.at.objects.natives.grammar.AGUnquoteSplice#meta_eval(ATContext)
55 	 */
56	public XIllegalUnquote(ATExpression unquotation) {
57		super(_MESSAGE_);
58		unquotation_ = unquotation;
59	}
60	
61	/**
62	 * @return the unquoted grammar element that was being evaluated.
63	 */
64	public ATExpression getUnquotation() { return unquotation_; }
65
66	public ATTypeTag getType() {
67		return NativeTypeTags._ILLUQUOTE_;
68	}
69}