169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/* 269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Javassist, a Java-bytecode translator toolkit. 369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Copyright (C) 1999-2007 Shigeru Chiba. All Rights Reserved. 469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * The contents of this file are subject to the Mozilla Public License Version 669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1.1 (the "License"); you may not use this file except in compliance with 769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the License. Alternatively, the contents of this file may be used under 869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * the terms of the GNU Lesser General Public License Version 2.1 or later. 969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * 1069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Software distributed under the License is distributed on an "AS IS" basis, 1169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 1269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * for the specific language governing rights and limitations under the 1369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * License. 1469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 1569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpackage javassist.compiler.ast; 1769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 1869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.compiler.TokenId; 1969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalimport javassist.compiler.CompileError; 2069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 2169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal/** 2269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Expression. 2369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 2469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigalpublic class Expr extends ASTList implements TokenId { 2569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal /* operator must be either of: 2669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * (unary) +, (unary) -, ++, --, !, ~, 2769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * ARRAY, . (dot), MEMBER (static member access). 2869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal * Otherwise, the object should be an instance of a subclass. 2969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal */ 3069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 3169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal protected int operatorId; 3269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 3369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal Expr(int op, ASTree _head, ASTList _tail) { 3469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal super(_head, _tail); 3569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal operatorId = op; 3669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 3769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 3869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal Expr(int op, ASTree _head) { 3969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal super(_head); 4069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal operatorId = op; 4169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 4269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public static Expr make(int op, ASTree oprand1, ASTree oprand2) { 4469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return new Expr(op, oprand1, new ASTList(oprand2)); 4569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 4669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 4769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public static Expr make(int op, ASTree oprand1) { 4869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return new Expr(op, oprand1); 4969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 5069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public int getOperator() { return operatorId; } 5269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void setOperator(int op) { operatorId = op; } 5469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public ASTree oprand1() { return getLeft(); } 5669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 5769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void setOprand1(ASTree expr) { 5869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal setLeft(expr); 5969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 6069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public ASTree oprand2() { return getRight().getLeft(); } 6269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void setOprand2(ASTree expr) { 6469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal getRight().setLeft(expr); 6569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 6669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public void accept(Visitor v) throws CompileError { v.atExpr(this); } 6869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 6969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal public String getName() { 7069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal int id = operatorId; 7169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal if (id < 128) 7269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return String.valueOf((char)id); 7369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal else if (NEQ <= id && id <= ARSHIFT_E) 7469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return opNames[id - NEQ]; 7569e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal else if (id == INSTANCEOF) 7669e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return "instanceof"; 7769e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal else 7869e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return String.valueOf(id); 7969e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 8069e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal 8169e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal protected String getTag() { 8269e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal return "op:" + getName(); 8369e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal } 8469e17611504376e4d4603925f8528dfc890fd2c6Luis Sigal} 85