| /* |
| * Copyright 2007 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| |
| /** |
| * Java cast expression. |
| */ |
| public class JCastOperation extends JExpression { |
| |
| private JType castType; |
| private JExpression expr; |
| |
| public JCastOperation(SourceInfo info, JType castType, JExpression expr) { |
| super(info); |
| this.castType = castType; |
| this.expr = expr; |
| } |
| |
| public JType getCastType() { |
| return castType; |
| } |
| |
| public JExpression getExpr() { |
| return expr; |
| } |
| |
| public JType getType() { |
| return castType; |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| // Any live cast operations might throw a ClassCastException |
| // |
| // TODO: revisit this when we support the concept of whether something |
| // can/must complete normally! |
| return true; |
| } |
| |
| /** |
| * Resolve an external reference during AST stitching. |
| */ |
| public void resolve(JType newType) { |
| assert newType.replaces(castType); |
| castType = newType; |
| } |
| |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (visitor.visit(this, ctx)) { |
| expr = visitor.accept(expr); |
| } |
| visitor.endVisit(this, ctx); |
| } |
| |
| } |