private static CompilationUnitSyntax ReplaceStaticCallWithExtionMethodCall(CompilationUnitSyntax root, InvocationExpressionSyntax staticInvocationExpression, ExpressionSyntax sourceExpression, SimpleNameSyntax methodName, ArgumentListSyntax argumentList)
{
var extensionInvocationExpression = CallExtensionMethodAsExtensionAnalyzer.CreateInvocationExpression(sourceExpression, methodName, argumentList)
.WithLeadingTrivia(staticInvocationExpression.GetLeadingTrivia());
return(root.ReplaceNode(staticInvocationExpression, extensionInvocationExpression));
}
private static async Task <Document> CallAsExtensionAsync(Document document, Diagnostic diagnostic, CancellationToken cancellationToken)
{
var root = (CompilationUnitSyntax)await document.GetSyntaxRootAsync(cancellationToken).ConfigureAwait(false);
var diagnosticSpan = diagnostic.Location.SourceSpan;
var staticInvocationExpression = root
.FindToken(diagnosticSpan.Start)
.Parent.AncestorsAndSelf()
.OfType <InvocationExpressionSyntax>()
.First();
var childNodes = staticInvocationExpression.ChildNodes();
var parameterExpressions = CallExtensionMethodAsExtensionAnalyzer.GetParameterExpressions(childNodes);
var firstArgument = parameterExpressions.FirstOrDefault();
var callerMethod = childNodes.OfType <MemberAccessExpressionSyntax>().FirstOrDefault();
root = ReplaceStaticCallWithExtionMethodCall(
root,
staticInvocationExpression,
firstArgument,
callerMethod.Name,
CallExtensionMethodAsExtensionAnalyzer.CreateArgumentListSyntaxFrom(parameterExpressions.Skip(1))
).WithAdditionalAnnotations(Formatter.Annotation);
var semanticModel = await document.GetSemanticModelAsync();
root = ImportNeededNamespace(root, semanticModel, callerMethod).WithAdditionalAnnotations(Formatter.Annotation);
var newDocument = document.WithSyntaxRoot(root);
return(newDocument);
}