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// 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 System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;
namespace Microsoft.CodeAnalysis.CSharp
{
internal partial class BoundSwitchExpression
{
public BoundDecisionDag GetDecisionDagForLowering(CSharpCompilation compilation, out LabelSymbol? defaultLabel)
{
defaultLabel = this.DefaultLabel;
BoundDecisionDag decisionDag = this.ReachabilityDecisionDag;
if (decisionDag.ContainsAnySynthesizedNodes())
{
decisionDag = DecisionDagBuilder.CreateDecisionDagForSwitchExpression(
compilation,
this.Syntax,
this.Expression,
this.SwitchArms,
// there's no default label if the original switch is exhaustive.
// we generate a new label here because the new dag might not be.
defaultLabel ??= new GeneratedLabelSymbol("default"),
BindingDiagnosticBag.Discarded,
forLowering: true);
Debug.Assert(!decisionDag.ContainsAnySynthesizedNodes());
}
return decisionDag;
}
}
}
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