/IronPython_2_0/Src/IronPython/Compiler/Ast/BreakStatement.cs

/* ****************************************************************************

 *

 * Copyright (c) Microsoft Corporation. 

 *

 * This source code is subject to terms and conditions of the Microsoft Public License. A 

 * copy of the license can be found in the License.html file at the root of this distribution. If 

 * you cannot locate the  Microsoft Public License, please send an email to 

 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound 

 * by the terms of the Microsoft Public License.

 *

 * You must not remove this notice, or any other, from this software.

 *

 *

 * ***************************************************************************/

using System; using Microsoft;





using AstUtils = Microsoft.Scripting.Ast.Utils;

using MSAst = Microsoft.Linq.Expressions;



namespace IronPython.Compiler.Ast {



    public class BreakStatement : Statement {

        public BreakStatement() {

        }



        internal override MSAst.Expression Transform(AstGenerator ag) {

            if (ag.InLoop) {

                return AstUtils.Break(ag.BreakLabel, Span);

            } else {

                ag.AddError("'break' outside loop", Span);

                return null;

            }

        }



        public override void Walk(PythonWalker walker) {

            if (walker.Walk(this)) {

            }

            walker.PostWalk(this);

        }



        internal override bool CanThrow {

            get {

                return false;

            }

        }

    }

}