J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1994-2003 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.tools.tree; |
| 27 | |
| 28 | import sun.tools.java.*; |
| 29 | import java.util.Hashtable; |
| 30 | |
| 31 | /** |
| 32 | * Parenthesised expressions. |
| 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 | |
| 39 | public |
| 40 | class ExprExpression extends UnaryExpression { |
| 41 | /** |
| 42 | * Constructor |
| 43 | */ |
| 44 | public ExprExpression(long where, Expression right) { |
| 45 | super(EXPR, where, right.type, right); |
| 46 | } |
| 47 | |
| 48 | /** |
| 49 | * Check a condition. We must pass it on to our unparenthesised form. |
| 50 | */ |
| 51 | public void checkCondition(Environment env, Context ctx, Vset vset, |
| 52 | Hashtable exp, ConditionVars cvars) { |
| 53 | right.checkCondition(env, ctx, vset, exp, cvars); |
| 54 | type = right.type; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Check the expression if it appears as an lvalue. |
| 59 | * We just pass it on to our unparenthesized subexpression. |
| 60 | * (Part of fix for 4090372) |
| 61 | */ |
| 62 | public Vset checkAssignOp(Environment env, Context ctx, |
| 63 | Vset vset, Hashtable exp, Expression outside) { |
| 64 | vset = right.checkAssignOp(env, ctx, vset, exp, outside); |
| 65 | type = right.type; |
| 66 | return vset; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Delegate to our subexpression. |
| 71 | * (Part of fix for 4090372) |
| 72 | */ |
| 73 | public FieldUpdater getUpdater(Environment env, Context ctx) { |
| 74 | return right.getUpdater(env, ctx); |
| 75 | } |
| 76 | |
| 77 | // Allow (x) = 9; |
| 78 | // |
| 79 | // I will hold off on this until I'm sure about it. Nobody's |
| 80 | // going to clammer for this one. |
| 81 | // |
| 82 | // public Vset checkLHS(Environment env, Context ctx, |
| 83 | // Vset vset, Hashtable exp) { |
| 84 | // vset = right.check(env, ctx, vset, exp); |
| 85 | // type = right.type; |
| 86 | // return vset; |
| 87 | // } |
| 88 | |
| 89 | public boolean isNull() { |
| 90 | return right.isNull(); |
| 91 | } |
| 92 | |
| 93 | public boolean isNonNull() { |
| 94 | return right.isNonNull(); |
| 95 | } |
| 96 | |
| 97 | // Probably not necessary |
| 98 | public Object getValue() { |
| 99 | return right.getValue(); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Delegate to our subexpression. |
| 104 | * See the comment in AddExpression#inlineValueSB() for |
| 105 | * information about this method. |
| 106 | */ |
| 107 | protected StringBuffer inlineValueSB(Environment env, |
| 108 | Context ctx, |
| 109 | StringBuffer buffer) { |
| 110 | return right.inlineValueSB(env, ctx, buffer); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Select the type of the expression |
| 115 | */ |
| 116 | void selectType(Environment env, Context ctx, int tm) { |
| 117 | type = right.type; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Simplify |
| 122 | */ |
| 123 | Expression simplify() { |
| 124 | return right; |
| 125 | } |
| 126 | } |