private static IMethodSymbol TryGetLambdaDelegateConversion(LambdaExpressionSyntax lambda, SemanticModel model)
{
// Check if we are a lambda that is a method argument
if (lambda == null || !(lambda.Parent is ArgumentSyntax))
{
return(null);
}
var index = ((ArgumentListSyntax)lambda.Parent.Parent).Arguments.IndexOf((ArgumentSyntax)lambda.Parent);
if (index == -1)
{
// Shouldn't happen
return(null);
}
var targetMethod = lambda.FindParent <InvocationExpressionSyntax>();
if (targetMethod == null)
{
return(null);
}
var methodSymbol = model.GetSymbolInfo(targetMethod).Symbol as IMethodSymbol;
if (methodSymbol == null)
{
return(null);
}
var parameter = methodSymbol.Parameters[index];
if (parameter.Type?.TypeKind != TypeKind.Delegate)
{
return(null);
}
return((parameter.Type as INamedTypeSymbol)?.DelegateInvokeMethod);
}
