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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;
using System.Diagnostics;
using System.Threading;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.CSharp
{
/// <summary>
/// This binder keeps track of the local variable (if any) that is currently being evaluated
/// so that it can be passed into the next call to LocalSymbol.GetConstantValue (and
/// its callers).
/// </summary>
internal sealed class LocalInProgressBinder : Binder
{
public readonly EqualsValueClauseSyntax InitializerSyntax;
private LocalSymbol? _localSymbol;
internal LocalInProgressBinder(EqualsValueClauseSyntax initializerSyntax, Binder next)
: base(next)
{
InitializerSyntax = initializerSyntax;
}
internal override LocalSymbol LocalInProgress
{
get
{
// The local symbol should have been initialized by now
Debug.Assert(_localSymbol is not null);
return _localSymbol;
}
}
internal void SetLocalSymbol(LocalSymbol local)
{
Interlocked.CompareExchange(ref _localSymbol, local, null);
}
}
}
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