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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.Collections.Generic;
using System.Threading;
using Microsoft.CodeAnalysis.CSharp.Extensions.ContextQuery;
using Microsoft.CodeAnalysis.CSharp.Utilities;
namespace Microsoft.CodeAnalysis.CSharp.Completion.KeywordRecommenders;
internal class OverrideKeywordRecommender : AbstractSyntacticSingleKeywordRecommender
{
private static readonly ISet<SyntaxKind> s_validMemberModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.ExternKeyword,
SyntaxKind.InternalKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.PrivateKeyword,
SyntaxKind.UnsafeKeyword,
SyntaxKind.SealedKeyword,
SyntaxKind.AbstractKeyword,
};
public OverrideKeywordRecommender()
: base(SyntaxKind.OverrideKeyword)
{
}
protected override bool IsValidContext(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
if (!context.IsMemberDeclarationContext(
validModifiers: s_validMemberModifiers,
validTypeDeclarations: SyntaxKindSet.ClassStructRecordTypeDeclarations,
canBePartial: false,
cancellationToken: cancellationToken))
{
return false;
}
var modifiers = context.PrecedingModifiers;
return !modifiers.Contains(SyntaxKind.PrivateKeyword) || modifiers.Contains(SyntaxKind.ProtectedKeyword);
}
}
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