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Java > Open Source Codes > org > aspectj > compiler > base > ast > MinusOpExpr


1 /* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  *
3  * This file is part of the compiler and core tools for the AspectJ(tm)
4  * programming language; see http://aspectj.org
5  *
6  * The contents of this file are subject to the Mozilla Public License
7  * Version 1.1 (the "License"); you may not use this file except in
8  * compliance with the License. You may obtain a copy of the License at
9  * either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is AspectJ.
17  *
18  * The Initial Developer of the Original Code is Xerox Corporation. Portions
19  * created by Xerox Corporation are Copyright (C) 1999-2002 Xerox Corporation.
20  * All Rights Reserved.
21  *
22  * Contributor(s):
23  */
24
25 package org.aspectj.compiler.base.ast;
26
27 import org.aspectj.compiler.base.JavaCompiler;
28 import org.aspectj.compiler.base.CodeWriter;
29 import java.io.IOException JavaDoc;
30
31 import java.util.*;
32
33 import org.aspectj.compiler.base.bcg.CodeBuilder;
34 import org.aspectj.compiler.base.bcg.Label;
35
36 /**
37  * @grammar - rand1
38  *
39  */
40 public class MinusOpExpr extends UnopExpr {
41
42
43     protected LiteralExpr halfFold(Type type, LiteralExpr lit) {
44         return type.foldMinusOp(lit);
45     }
46
47     protected Type discoverType() {
48         Expr rand1 = getRand1();
49         Type ty1 = rand1.getType();
50
51         if (ty1.isNumeric()) {
52             return getTypeManager().unaryNumericPromotion(ty1);
53         } else {
54             showOperatorTypeError(ty1);
55             return getTypeManager().anyType;
56         }
57     }
58
59     protected Type getLiftType() {
60         return getType();
61     }
62
63     // ------------------------------
64 // bcg
65 public void cgValue(CodeBuilder cb) {
66         Type liftType = getLiftType();
67         getRand1().cgValue(cb, liftType);
68         liftType.emitNeg(cb);
69     }
70
71     //BEGIN: Generated from @child and @property
72
73     public MinusOpExpr(SourceLocation location, String JavaDoc _op, Expr _rand1) {
74         super(location, _op, _rand1);
75
76     }
77     protected MinusOpExpr(SourceLocation source) {
78         super(source);
79     }
80
81     public ASTObject copyWalk(CopyWalker walker) {
82         MinusOpExpr ret = new MinusOpExpr(getSourceLocation());
83         ret.preCopy(walker, this);
84         ret.op = op;
85         if (rand1 != null) ret.setRand1( (Expr)walker.process(rand1) );
86         return ret;
87     }
88
89
90     public String JavaDoc getDefaultDisplayName() {
91         return "MinusOpExpr(op: "+op+")";
92     }
93
94     //END: Generated from @child and @property
95 }
96
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