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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;
using System.Threading;
using Microsoft.CodeAnalysis.CSharp.Extensions;
using Microsoft.CodeAnalysis.CSharp.LanguageService;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.LanguageService;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.CodeAnalysis.Simplification;
namespace Microsoft.CodeAnalysis.CSharp.Simplification;
internal partial class CSharpParenthesizedPatternReducer : AbstractCSharpReducer
{
private static readonly ObjectPool<IReductionRewriter> s_pool = new(
() => new Rewriter(s_pool));
private static readonly Func<ParenthesizedPatternSyntax, SemanticModel, SimplifierOptions, CancellationToken, SyntaxNode> s_simplifyParentheses = SimplifyParentheses;
public CSharpParenthesizedPatternReducer() : base(s_pool)
{
}
protected override bool IsApplicable(CSharpSimplifierOptions options)
=> true;
private static SyntaxNode SimplifyParentheses(
ParenthesizedPatternSyntax node,
SemanticModel semanticModel,
SimplifierOptions options,
CancellationToken cancellationToken)
{
if (node.CanRemoveParentheses())
{
var resultNode = CSharpSyntaxFacts.Instance.Unparenthesize(node);
return SimplificationHelpers.CopyAnnotations(from: node, to: resultNode);
}
// We don't know how to simplify this.
return node;
}
}
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