删除块的内容缩进 [英] Outdenting of content of removed block

问题描述

我正在编写带有代码修复功能的 Roslyn 诊断程序.如果有一个带有一个空 catch 块的 try 块，我想提供删除 catch 块并用其内容替换 try 块的选项.我的问题是 try 块内容的缩进.我尝试使用格式化程序，但行仍然缩进一级太多.这是我的代码:

I'm writing a Roslyn Diagnostic with Code Fix. If there's a try block with one empty catch block, i want to provide the option to remove the catch block and replace the try block with its content. My problem is the outdenting of the content of the try block. I tried using the Formatter, but the lines are still indentend one level too much. Here's my code:

private async Task<Document> RemoveTryCatchBlockAsync(Document document, TryStatementSyntax tryBlock, CancellationToken cancellationToken)
{
    var oldRoot = await document.GetSyntaxRootAsync(cancellationToken);
    var newRoot = oldRoot.ReplaceNode(tryBlock, tryBlock.Block.ChildNodes());
    Formatter.Format(newRoot, MSBuildWorkspace.Create());

    // Return document with transformed tree. 
    return document.WithSyntaxRoot(newRoot);
}

推荐答案

Roslyn 是非常不可变的，您的 Formatter 不会更改原始节点，而是返回一个已格式化的新节点.

Roslyn is very immutable, your Formatter won't be changing the original node but instead return you a new one that is formatted.

相反，试试这个:

var formattedRoot = Formatter.Format(newRoot, MSBuildWorkspace.Create());
return document.WithSyntaxRoot(formattedRoot);

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