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RemoveEmptyInitializerRefactoring.cs
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RemoveEmptyInitializerRefactoring.cs
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// Copyright (c) Josef Pihrt and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.Text;
namespace Roslynator.CSharp.Refactorings;
internal static class RemoveEmptyInitializerRefactoring
{
public static Task<Document> RefactorAsync(
Document document,
ObjectCreationExpressionSyntax objectCreationExpression,
CancellationToken cancellationToken)
{
ArgumentListSyntax argumentList = objectCreationExpression.ArgumentList;
InitializerExpressionSyntax initializer = objectCreationExpression.Initializer;
ObjectCreationExpressionSyntax newNode = objectCreationExpression.WithInitializer(null);
if (argumentList is null)
{
TypeSyntax type = objectCreationExpression.Type;
ArgumentListSyntax newArgumentList = SyntaxFactory.ArgumentList();
IEnumerable<SyntaxTrivia> trivia = objectCreationExpression.DescendantTrivia(TextSpan.FromBounds(type.Span.End, initializer.Span.End));
if (trivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
newArgumentList = newArgumentList.WithTrailingTrivia(trivia);
newNode = newNode
.WithType(type.WithoutTrailingTrivia())
.WithArgumentList(newArgumentList);
}
else
{
IEnumerable<SyntaxTrivia> trivia = objectCreationExpression.DescendantTrivia(TextSpan.FromBounds(argumentList.Span.End, initializer.Span.End));
if (trivia.Any(f => !f.IsWhitespaceOrEndOfLineTrivia()))
{
newNode = newNode.WithTrailingTrivia(trivia);
}
else
{
newNode = newNode.WithoutTrailingTrivia();
}
}
newNode = newNode
.AppendToTrailingTrivia(initializer.GetTrailingTrivia())
.WithFormatterAnnotation();
return document.ReplaceNodeAsync(objectCreationExpression, newNode, cancellationToken);
}
}