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/interpreter/tags/at2dist110511/src/edu/vub/at/exceptions/XIllegalSplice.java

http://ambienttalk.googlecode.com/
Java | 69 lines | 17 code | 8 blank | 44 comment | 0 complexity | 5d17571101cc974b56194beb70f15681 MD5 | raw file
 1/**
 2 * AmbientTalk/2 Project
 3 * XIllegalSplice.java created on 1-aug-2006 at 21:20:36
 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 * XIllegalSplice is thrown when an <code>@</code> token was not encountered in one of its legal
36 * positions namely when unquoting a table or in the argument-list of an application. 
37 * The incorrect position is detected due to the fact that the splice is evaluated directly,
38 * rather than being expanded.
39 * 
40 * @author tvc
41 */
42public final class XIllegalSplice extends InterpreterException {
43
44	private static final long serialVersionUID = -1363939697987417869L;
45
46	private static final String _MESSAGE_ = "Spliced expression in illegal expression";
47	
48	private final ATExpression spliceExpression_;
49	
50	/**
51	 * Constructor reporting that a splice expression was encountered in an invalid position
52	 * @param spliceExp the splice expression
53	 * 
54	 * @see edu.vub.at.objects.natives.grammar.AGSplice#meta_eval(ATContext)
55	 */
56	public XIllegalSplice(ATExpression spliceExp) {
57		super(_MESSAGE_);
58		spliceExpression_ = spliceExp;
59	}
60	
61	/**
62	 * @return the invalid splice expression.
63	 */
64	public ATExpression getSpliceExpression() { return spliceExpression_; }
65
66	public ATTypeTag getType() {
67		return NativeTypeTags._ILLSPLICE_;
68	}
69}