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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 SealedKeywordRecommender : AbstractSyntacticSingleKeywordRecommender
{
private static readonly ISet<SyntaxKind> s_validNonInterfaceMemberModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.ExternKeyword,
SyntaxKind.InternalKeyword,
SyntaxKind.NewKeyword,
SyntaxKind.OverrideKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.UnsafeKeyword,
};
private static readonly ISet<SyntaxKind> s_validInterfaceMemberModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.ExternKeyword,
SyntaxKind.InternalKeyword,
SyntaxKind.NewKeyword,
SyntaxKind.OverrideKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.StaticKeyword,
SyntaxKind.UnsafeKeyword,
};
private static readonly ISet<SyntaxKind> s_validTypeModifiers = new HashSet<SyntaxKind>(SyntaxFacts.EqualityComparer)
{
SyntaxKind.InternalKeyword,
SyntaxKind.NewKeyword,
SyntaxKind.PublicKeyword,
SyntaxKind.PrivateKeyword,
SyntaxKind.ProtectedKeyword,
SyntaxKind.UnsafeKeyword,
SyntaxKind.FileKeyword,
};
public SealedKeywordRecommender()
: base(SyntaxKind.SealedKeyword)
{
}
protected override bool IsValidContext(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
return
context.IsGlobalStatementContext ||
context.IsMemberDeclarationContext(
validModifiers: s_validNonInterfaceMemberModifiers,
validTypeDeclarations: SyntaxKindSet.ClassRecordTypeDeclarations,
canBePartial: false,
cancellationToken: cancellationToken) ||
context.IsMemberDeclarationContext(
validModifiers: s_validInterfaceMemberModifiers,
validTypeDeclarations: SyntaxKindSet.InterfaceOnlyTypeDeclarations,
canBePartial: false,
cancellationToken: cancellationToken) ||
context.IsTypeDeclarationContext(
validModifiers: s_validTypeModifiers,
validTypeDeclarations: SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations,
canBePartial: false,
cancellationToken: cancellationToken);
}
}
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