LocalRewriter_GotoStatement.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;

namespace Microsoft.CodeAnalysis.CSharp
{
    internal sealed partial class LocalRewriter
    {
        public override BoundNode VisitGotoStatement(BoundGotoStatement node)
        {
            // we are removing the label expressions from the bound tree because this expression is no longer needed
            // for the emit phase. It is even doing harm to e.g. the stack depth calculation because this expression
            // would not need to be pushed to the stack.
            BoundExpression? caseExpressionOpt = null;

            // we are removing the label expressions from the bound tree because this expression is no longer needed
            // for the emit phase. It is even doing harm to e.g. the stack depth calculation because this expression
            // would not need to be pushed to the stack.
            BoundLabel? labelExpressionOpt = null;
            BoundStatement result = node.Update(node.Label, caseExpressionOpt, labelExpressionOpt);
            if (this.Instrument && !node.WasCompilerGenerated)
            {
                result = Instrumenter.InstrumentGotoStatement(node, result);
            }

            return result;
        }

        public override BoundNode? VisitLabel(BoundLabel node)
        {
            // we are removing the label expressions from the bound tree because this expression is no longer needed
            // for the emit phase. It is even doing harm to e.g. the stack depth calculation because this expression
            // would not need to be pushed to the stack.
            return null;
        }
    }
}