1 /*
2 * ASPrefixExpression.java
3 *
4 * Copyright (c) 2008 David Holroyd
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 package uk.co.badgersinfoil.metaas.dom;
20
21 /**
22 * A prefix-expression, such as <code>!a</code> or <code>++a</code>.
23 *
24 * @see uk.co.badgersinfoil.metaas.ActionScriptFactory#newPositiveExpression(Expression)
25 * @see uk.co.badgersinfoil.metaas.ActionScriptFactory#newPreDecExpression(Expression)
26 * @see uk.co.badgersinfoil.metaas.ActionScriptFactory#newPostIncExpression(Expression)
27 * @see uk.co.badgersinfoil.metaas.ActionScriptFactory#newNotExpression(Expression)
28 * @see uk.co.badgersinfoil.metaas.ActionScriptFactory#newNegativeExpression(Expression)
29 */
30 public interface ASPrefixExpression extends Expression {
31 public Op getOperator();
32 public void setOperator(Op operator);
33 public Expression getSubexpression();
34 public void setSubexpression(Expression expression);
35
36 /**
37 * The operators allowed for a prefix-expression
38 */
39 public static class Op {
40 private String name;
41 private Op(String name) {
42 this.name = name;
43 }
44
45 /** Negation <code>-expr</code> */
46 public static final Op NEG = new Op("NEG");
47 /** Inverse <code>!expr</code> */
48 public static final Op NOT = new Op("NOT");
49 /** Positive expression <code>+expr</code> */
50 public static final Op POS = new Op("POS");
51 /** Pre-decrement <code>--expr</code> */
52 public static final Op PREDEC = new Op("PREDEC");
53 /** Pre-increment <code>++expr</code> */
54 public static final Op PREINC = new Op("PREINC");
55
56 public String toString() {
57 return name;
58 }
59 }
60 }