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