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.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 */ CommaExpression(long where, Expression left, Expression right)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 */ check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> exp)49 public Vset check(Environment env, Context ctx, Vset vset, Hashtable<Object, Object> 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 */ selectType(Environment env, Context ctx, int tm)58 void selectType(Environment env, Context ctx, int tm) { 59 type = right.type; 60 } 61 62 /** 63 * Simplify 64 */ simplify()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 */ inline(Environment env, Context ctx)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 } inlineValue(Environment env, Context ctx)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 */ codeLValue(Environment env, Context ctx, Assembler asm)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 codeLoad(Environment env, Context ctx, Assembler asm)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 codeStore(Environment env, Context ctx, Assembler asm)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 codeValue(Environment env, Context ctx, Assembler asm)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 } code(Environment env, Context ctx, Assembler asm)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 } 151