private void AnalyzeAwaitExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (AwaitExpressionSyntax)context.Node;
var configureAwaitConfig = ConfigureAwaitConfiguration.TryGetConfigureAwait(context.Compilation);
if (configureAwaitConfig == ConfigureAwait.UseConfigureAwaitFalse)
{
var operation = context.SemanticModel.GetOperation(invocation, context.CancellationToken);
if (operation is IAwaitOperation awaitOperation)
{
if (awaitOperation.Operation is IInvocationOperation configureAwaitOperation)
{
if (configureAwaitOperation.TargetMethod.IsConfigureAwait(context.Compilation))
{
return;
}
if (configureAwaitOperation.Type.IsClrType(context.Compilation, typeof(YieldAwaitable)))
{
return;
}
}
var location = awaitOperation.Syntax.GetLocation();
var diagnostic = Diagnostic.Create(Rule, location);
context.ReportDiagnostic(diagnostic);
}
}
}
private void AnalyzeAwaitExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (AwaitExpressionSyntax)context.Node;
var configureAwaitConfig = ConfigureAwaitConfiguration.TryGetConfigureAwait(context.Compilation);
if (configureAwaitConfig == ConfigureAwait.DoNotUseConfigureAwait)
{
var operation = context.SemanticModel.GetOperation(invocation, context.CancellationToken);
if (operation is IAwaitOperation awaitOperation &&
awaitOperation.Operation is IInvocationOperation configureAwaitOperation &&
configureAwaitOperation.TargetMethod.IsConfigureAwait(context.Compilation))
{
if (configureAwaitOperation.Arguments.Length != 0 &&
configureAwaitOperation.Arguments[0].Value is ILiteralOperation literal &&
literal.ConstantValue.HasValue &&
literal.ConstantValue.Value.Equals(false))
{
var location = configureAwaitOperation.Syntax.GetLocation();
// Need to find 'ConfigureAwait' node.
if (configureAwaitOperation.Syntax is InvocationExpressionSyntax i &&
i.Expression is
MemberAccessExpressionSyntax mae)
{
// This is a really weird way for getting a location for 'ConfigureAwait(false)' span!
var argsLocation = i.ArgumentList.GetLocation();
var nameLocation = mae.Name.GetLocation().SourceSpan;
location = Location.Create(argsLocation.SourceTree,
TextSpan.FromBounds(nameLocation.Start, argsLocation.SourceSpan.End));
}
var diagnostic = Diagnostic.Create(UnnecessaryWithSuggestionDescriptor, location);
context.ReportDiagnostic(diagnostic);
}
}
}
}