1 /*
2  * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package sun.tools.tree;
27 
28 import sun.tools.java.*;
29 import sun.tools.asm.Assembler;
30 import java.io.PrintStream;
31 import java.util.Hashtable;
32 
33 /**
34  * WARNING: The contents of this source file are not part of any
35  * supported API.  Code that depends on them does so at its own risk:
36  * they are subject to change or removal without notice.
37  */
38 public
39 class SuperExpression extends ThisExpression {
40 
41     /**
42      * Constructor
43      */
SuperExpression(long where)44     public SuperExpression(long where) {
45         super(SUPER, where);
46     }
47 
48     /**
49      * Constructor for "outer.super()"
50      */
SuperExpression(long where, Expression outerArg)51     public SuperExpression(long where, Expression outerArg) {
52         super(where, outerArg);
53         op = SUPER;
54     }
55 
SuperExpression(long where, Context ctx)56     public SuperExpression(long where, Context ctx) {
57         super(where, ctx);
58         op = SUPER;
59     }
60 
61     /**
62      * Check expression
63      */
checkValue(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp)64     public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) {
65         vset = checkCommon(env, ctx, vset, exp);
66         if (type != Type.tError) {
67             // "super" is not allowed in this context:
68             env.error(where, "undef.var.super", idSuper);
69         }
70         return vset;
71     }
72 
73     /**
74      * Check if the present name is part of a scoping prefix.
75      */
checkAmbigName(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp, UnaryExpression loc)76     public Vset checkAmbigName(Environment env, Context ctx,
77                                Vset vset, Hashtable<Object, Object> exp,
78                                UnaryExpression loc) {
79         return checkCommon(env, ctx, vset, exp);
80     }
81 
82     /** Common code for checkValue and checkAmbigName */
checkCommon(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp)83     private Vset checkCommon(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp) {
84         ClassDeclaration superClass = ctx.field.getClassDefinition().getSuperClass();
85         if (superClass == null) {
86             env.error(where, "undef.var", idSuper);
87             type = Type.tError;
88             return vset;
89         }
90         vset = super.checkValue(env, ctx, vset, exp);
91         type = superClass.getType();
92         return vset;
93     }
94 
95 }
96