我正在为分析器创建一个 CodeFixProvider,用于检测MessagePackObject类声明中是否缺少属性。此外,我的属性需要有一个keyAsPropertyName带值的参数true
[MessagePackObject(keyAsPropertyName:true)]
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我已经完成了像这样添加没有参数的属性(我的解决方法)
private async Task<Solution> AddAttributeAsync(Document document, ClassDeclarationSyntax classDecl, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken);
var attributes = classDecl.AttributeLists.Add(
SyntaxFactory.AttributeList(SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Attribute(SyntaxFactory.IdentifierName("MessagePackObject"))
// .WithArgumentList(SyntaxFactory.AttributeArgumentList(SyntaxFactory.SingletonSeparatedList(SyntaxFactory.AttributeArgument(SyntaxFactory.("keyAsPropertyName")))))))
// .WithArgumentList(...)
)).NormalizeWhitespace());
return document.WithSyntaxRoot(
root.ReplaceNode(
classDecl,
classDecl.WithAttributeLists(attributes)
)).Project.Solution;
}
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但我不知道如何添加具有值的参数的属性。有人可以帮我吗?
[MessagePackObject(keyAsPropertyName:true)]是AttributeArgumentSyntax具有 NameColons 而没有 NameEquals 的,因此您只需要创建它作为 NameEquals 不传递任何内容并传递正确的初始表达式,如下所示:
...
var attributeArgument = SyntaxFactory.AttributeArgument(
null, SyntaxFactory.NameColon("keyAsPropertyName"), SyntaxFactory.LiteralExpression(SyntaxKind.TrueLiteralExpression));
var attributes = classDecl.AttributeLists.Add(
SyntaxFactory.AttributeList(SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Attribute(SyntaxFactory.IdentifierName("MessagePackObject"))
.WithArgumentList(SyntaxFactory.AttributeArgumentList(SyntaxFactory.SingletonSeparatedList(attributeArgument)))
)).NormalizeWhitespace());
...
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