private static StatementSyntax CreateStatement(MethodDeclarationSyntax methodNode, IMethodSymbol methodSymbol)
{
var methodParameters = methodSymbol.Parameters;
var arguments = new string[methodParameters.Length];
for (var i = 0; i < methodParameters.Length; i++)
{
var parameter = methodParameters[i];
var argument = parameter.Name;
if (parameter.RefKind.HasFlag(RefKind.Ref))
{
argument = $"ref {argument}";
}
else if (parameter.RefKind.HasFlag(RefKind.Out))
{
argument = $"out {argument}";
}
arguments[i] = argument;
}
var methodCall = $"base.{methodSymbol.Name}({string.Join(", ", arguments)});{Environment.NewLine}";
if (!methodSymbol.ReturnsVoid)
{
var variableName = MustInvokeBaseMethodCallMethodCodeFix.CreateSafeLocalVariableName(
methodNode, methodSymbol);
methodCall = $"var {variableName} = {methodCall}";
}
return(SyntaxFactory.ParseStatement(methodCall).WithAdditionalAnnotations(Formatter.Annotation));
}
public override async Task RegisterCodeFixesAsync(CodeFixContext context)
{
var root = await context.Document.GetSyntaxRootAsync(
context.CancellationToken).ConfigureAwait(false);
context.CancellationToken.ThrowIfCancellationRequested();
var diagnostic = context.Diagnostics[0];
var methodNode = root.FindNode(diagnostic.Location.SourceSpan) as MethodDeclarationSyntax;
var model = await context.Document.GetSemanticModelAsync(context.CancellationToken);
var methodSymbol = model.GetDeclaredSymbol(methodNode) as IMethodSymbol;
// Syntax tree way.
//var invocation = MustInvokeBaseMethodCallMethodCodeFix.CreateInvocation(
// methodSymbol);
//invocation = MustInvokeBaseMethodCallMethodCodeFix.AddArguments(
// context, methodSymbol, invocation);
//var statement = MustInvokeBaseMethodCallMethodCodeFix.CreateStatement(
// context, methodNode, methodSymbol, invocation);
// Code parsing way
var statement = MustInvokeBaseMethodCallMethodCodeFix.CreateStatement(
methodNode, methodSymbol);
var newRoot = MustInvokeBaseMethodCallMethodCodeFix.CreateNewRoot(
root, methodNode, statement);
const string codeFixDescription = "Add base invocation";
context.RegisterCodeFix(
CodeAction.Create(codeFixDescription,
_ => Task.FromResult(context.Document.WithSyntaxRoot(newRoot)),
codeFixDescription), diagnostic);
}