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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.Threading;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.Extensions.ContextQuery;
using Microsoft.CodeAnalysis.CSharp.Utilities;
using Microsoft.CodeAnalysis.Shared.Extensions;
namespace Microsoft.CodeAnalysis.CSharp.Completion.KeywordRecommenders;
internal sealed class StringKeywordRecommender : AbstractSpecialTypePreselectingKeywordRecommender
{
public StringKeywordRecommender()
: base(SyntaxKind.StringKeyword)
{
}
protected override SpecialType SpecialType => SpecialType.System_String;
protected override bool IsValidContextWorker(int position, CSharpSyntaxContext context, CancellationToken cancellationToken)
{
var syntaxTree = context.SyntaxTree;
return
context.IsAnyExpressionContext ||
context.IsDefiniteCastTypeContext ||
context.IsStatementContext ||
context.IsGlobalStatementContext ||
context.IsObjectCreationTypeContext ||
(context.IsGenericTypeArgumentContext && !context.TargetToken.GetRequiredParent().HasAncestor<XmlCrefAttributeSyntax>()) ||
context.IsFunctionPointerTypeArgumentContext ||
context.IsIsOrAsTypeContext ||
context.IsLocalVariableDeclarationContext ||
context.IsParameterTypeContext ||
context.IsPossibleLambdaOrAnonymousMethodParameterTypeContext ||
context.IsLocalFunctionDeclarationContext ||
context.IsImplicitOrExplicitOperatorTypeContext ||
context.IsTypeOfExpressionContext ||
context.IsCrefContext ||
context.IsUsingAliasTypeContext ||
syntaxTree.IsDefaultExpressionContext(position, context.LeftToken) ||
syntaxTree.IsAfterKeyword(position, SyntaxKind.ConstKeyword, cancellationToken) ||
context.IsDelegateReturnTypeContext ||
syntaxTree.IsGlobalMemberDeclarationContext(position, SyntaxKindSet.AllGlobalMemberModifiers, cancellationToken) ||
context.IsPossibleTupleContext ||
context.IsMemberDeclarationContext(
validModifiers: SyntaxKindSet.AllMemberModifiers,
validTypeDeclarations: SyntaxKindSet.ClassInterfaceStructRecordTypeDeclarations,
canBePartial: false,
cancellationToken);
}
}
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