private async static Task <Document> ConvertAsync(Document document, Diagnostic diagnostic, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var diagnosticSpan = diagnostic.Location.SourceSpan;
var lambda = root.FindToken(diagnosticSpan.Start).Parent
.AncestorsAndSelf().First(x => x.Kind() == SyntaxKind.SimpleLambdaExpression ||
x.Kind() == SyntaxKind.ParenthesizedLambdaExpression);
var methodInvoke = ConvertLambdaExpressionToMethodGroupAnalyzer.GetInvocationIfAny(lambda);
var newRoot = root.ReplaceNode(lambda as ExpressionSyntax, methodInvoke.Expression as ExpressionSyntax);
var newDocument = document.WithSyntaxRoot(newRoot);
return(newDocument);
}
public sealed override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
var root = await context.Document.GetSyntaxRootAsync(context.CancellationToken).ConfigureAwait(false);
var diagnostic = context.Diagnostics.First();
var diagnosticSpan = diagnostic.Location.SourceSpan;
var lambda = root.FindToken(diagnosticSpan.Start).Parent
.AncestorsAndSelf().First(x => x.Kind() == SyntaxKind.SimpleLambdaExpression ||
x.Kind() == SyntaxKind.ParenthesizedLambdaExpression);
var methodInvoke = ConvertLambdaExpressionToMethodGroupAnalyzer.GetInvocationIfAny(lambda);
var newRoot = root.ReplaceNode(lambda as ExpressionSyntax, methodInvoke.Expression as ExpressionSyntax);
var newDocument = context.Document.WithSyntaxRoot(newRoot);
context.RegisterCodeFix(CodeAction.Create(
"Use method name instead of lambda expression when signatures match", ct => Task.FromResult(newDocument)), diagnostic);
}
