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 30 /** 31 * WARNING: The contents of this source file are not part of any 32 * supported API. Code that depends on them does so at its own risk: 33 * they are subject to change or removal without notice. 34 */ 35 public 36 class BinaryShiftExpression extends BinaryExpression { 37 /** 38 * constructor 39 */ BinaryShiftExpression(int op, long where, Expression left, Expression right)40 public BinaryShiftExpression(int op, long where, Expression left, Expression right) { 41 super(op, where, left.type, left, right); 42 } 43 44 /** 45 * Evaluate the expression 46 */ eval()47 Expression eval() { 48 // The eval code in BinaryExpression.java only works correctly 49 // for arithmetic expressions. For shift expressions, we get cases 50 // where the left and right operand may legitimately be of mixed 51 // types (long and int). This is a fix for 4082814. 52 if (left.op == LONGVAL && right.op == INTVAL) { 53 return eval(((LongExpression)left).value, 54 ((IntExpression)right).value); 55 } 56 57 // Delegate the rest of the cases to our parent, so as to minimize 58 // impact on existing behavior. 59 return super.eval(); 60 } 61 62 /** 63 * Select the type 64 */ selectType(Environment env, Context ctx, int tm)65 void selectType(Environment env, Context ctx, int tm) { 66 if (left.type == Type.tLong) { 67 type = Type.tLong; 68 } else if (left.type.inMask(TM_INTEGER)) { 69 type = Type.tInt; 70 left = convert(env, ctx, type, left); 71 } else { 72 type = Type.tError; 73 } 74 if (right.type.inMask(TM_INTEGER)) { 75 right = new ConvertExpression(where, Type.tInt, right); 76 } else { 77 right = convert(env, ctx, Type.tInt, right); 78 } 79 } 80 } 81