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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.
#nullable disable
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Diagnostics;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Roslyn.Utilities;
namespace Microsoft.CodeAnalysis.CSharp
{
/// <summary>
/// Binder used to place the parameters of a method, property, indexer, or delegate
/// in scope when binding <param> tags inside of XML documentation comments
/// and `nameof` in certain attribute positions.
/// </summary>
internal sealed class WithParametersBinder : Binder
{
private readonly ImmutableArray<ParameterSymbol> _parameters;
internal WithParametersBinder(ImmutableArray<ParameterSymbol> parameters, Binder next)
: base(next)
{
Debug.Assert(!parameters.IsDefaultOrEmpty);
_parameters = parameters;
}
internal override void AddLookupSymbolsInfoInSingleBinder(LookupSymbolsInfo result, LookupOptions options, Binder originalBinder)
{
if (options.CanConsiderLocals())
{
foreach (var parameter in _parameters)
{
if (originalBinder.CanAddLookupSymbolInfo(parameter, options, result, null))
{
result.AddSymbol(parameter, parameter.Name, 0);
}
}
}
}
internal override void LookupSymbolsInSingleBinder(
LookupResult result, string name, int arity, ConsList<TypeSymbol> basesBeingResolved, LookupOptions options, Binder originalBinder, bool diagnose, ref CompoundUseSiteInfo<AssemblySymbol> useSiteInfo)
{
if ((options & (LookupOptions.NamespaceAliasesOnly | LookupOptions.MustBeInvocableIfMember)) != 0)
{
return;
}
Debug.Assert(result.IsClear);
foreach (ParameterSymbol parameter in _parameters)
{
if (parameter.Name == name)
{
result.MergeEqual(originalBinder.CheckViability(parameter, arity, options, null, diagnose, ref useSiteInfo));
}
}
}
}
}
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