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 sun.tools.asm.Assembler; |
| 30 | import java.util.Hashtable; |
| 31 | |
| 32 | /** |
| 33 | * WARNING: The contents of this source file are not part of any |
| 34 | * supported API. Code that depends on them does so at its own risk: |
| 35 | * they are subject to change or removal without notice. |
| 36 | */ |
| 37 | public |
| 38 | class CommaExpression extends BinaryExpression { |
| 39 | /** |
| 40 | * constructor |
| 41 | */ |
| 42 | public CommaExpression(long where, Expression left, Expression right) { |
| 43 | super(COMMA, where, (right != null) ? right.type : Type.tVoid, left, right); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Check void expression |
| 48 | */ |
| 49 | public Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { |
| 50 | vset = left.check(env, ctx, vset, exp); |
| 51 | vset = right.check(env, ctx, vset, exp); |
| 52 | return vset; |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Select the type |
| 57 | */ |
| 58 | void selectType(Environment env, Context ctx, int tm) { |
| 59 | type = right.type; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Simplify |
| 64 | */ |
| 65 | Expression simplify() { |
| 66 | if (left == null) { |
| 67 | return right; |
| 68 | } |
| 69 | if (right == null) { |
| 70 | return left; |
| 71 | } |
| 72 | return this; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Inline |
| 77 | */ |
| 78 | public Expression inline(Environment env, Context ctx) { |
| 79 | if (left != null) { |
| 80 | left = left.inline(env, ctx); |
| 81 | } |
| 82 | if (right != null) { |
| 83 | right = right.inline(env, ctx); |
| 84 | } |
| 85 | return simplify(); |
| 86 | } |
| 87 | public Expression inlineValue(Environment env, Context ctx) { |
| 88 | if (left != null) { |
| 89 | left = left.inline(env, ctx); |
| 90 | } |
| 91 | if (right != null) { |
| 92 | right = right.inlineValue(env, ctx); |
| 93 | } |
| 94 | return simplify(); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Code |
| 99 | */ |
| 100 | int codeLValue(Environment env, Context ctx, Assembler asm) { |
| 101 | if (right == null) { |
| 102 | // throw an appropriate error |
| 103 | return super.codeLValue(env, ctx, asm); |
| 104 | } else { |
| 105 | // Fully code the left-hand side. Do the LValue part of the |
| 106 | // right-hand side now. The remainder will be done by codeLoad or |
| 107 | // codeStore |
| 108 | if (left != null) { |
| 109 | left.code(env, ctx, asm); |
| 110 | } |
| 111 | return right.codeLValue(env, ctx, asm); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | void codeLoad(Environment env, Context ctx, Assembler asm) { |
| 116 | // The left-hand part has already been handled by codeLValue. |
| 117 | |
| 118 | if (right == null) { |
| 119 | // throw an appropriate error |
| 120 | super.codeLoad(env, ctx, asm); |
| 121 | } else { |
| 122 | right.codeLoad(env, ctx, asm); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | void codeStore(Environment env, Context ctx, Assembler asm) { |
| 127 | // The left-hand part has already been handled by codeLValue. |
| 128 | if (right == null) { |
| 129 | // throw an appropriate error |
| 130 | super.codeStore(env, ctx, asm); |
| 131 | } else { |
| 132 | right.codeStore(env, ctx, asm); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | public void codeValue(Environment env, Context ctx, Assembler asm) { |
| 137 | if (left != null) { |
| 138 | left.code(env, ctx, asm); |
| 139 | } |
| 140 | right.codeValue(env, ctx, asm); |
| 141 | } |
| 142 | public void code(Environment env, Context ctx, Assembler asm) { |
| 143 | if (left != null) { |
| 144 | left.code(env, ctx, asm); |
| 145 | } |
| 146 | if (right != null) { |
| 147 | right.code(env, ctx, asm); |
| 148 | } |
| 149 | } |
| 150 | } |