001    // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
002    // for details. All rights reserved. Use of this source code is governed by a
003    // BSD-style license that can be found in the LICENSE file.
004    
005    package com.google.dart.compiler.backend.js.ast;
006    
007    import com.google.dart.compiler.util.AstUtil;
008    import org.jetbrains.annotations.NotNull;
009    
010    public final class JsPrefixOperation extends JsUnaryOperation {
011        public JsPrefixOperation(JsUnaryOperator op, JsExpression arg) {
012            super(op, arg);
013        }
014    
015        @Override
016        public void accept(JsVisitor v) {
017            v.visitPrefixOperation(this);
018        }
019    
020        @Override
021        public void traverse(JsVisitorWithContext v, JsContext ctx) {
022            if (v.visit(this, ctx)) {
023                super.traverse(v, ctx);
024            }
025            v.endVisit(this, ctx);
026        }
027    
028        @NotNull
029        @Override
030        public JsPrefixOperation deepCopy() {
031            return new JsPrefixOperation(getOperator(), AstUtil.deepCopy(getArg())).withMetadataFrom(this);
032        }
033    }