/// <summary>
/// Returns syntax for the options argument to <see cref="GrainReference.InvokeMethodAsync{T}"/> and <see cref="GrainReference.InvokeOneWayMethod"/>.
/// </summary>
/// <param name="method">The method which an invoke call is being generated for.</param>
/// <returns>
/// Argument syntax for the options argument to <see cref="GrainReference.InvokeMethodAsync{T}"/> and
/// <see cref="GrainReference.InvokeOneWayMethod"/>, or <see langword="null"/> if no options are to be specified.
/// </returns>
private static ArgumentSyntax GetInvokeOptions(MethodInfo method)
{
var options = new List <ExpressionSyntax>();
if (GrainInterfaceUtils.IsReadOnly(method))
{
options.Add(typeof(InvokeMethodOptions).GetNameSyntax().Member(InvokeMethodOptions.ReadOnly.ToString()));
}
if (GrainInterfaceUtils.IsUnordered(method))
{
options.Add(typeof(InvokeMethodOptions).GetNameSyntax().Member(InvokeMethodOptions.Unordered.ToString()));
}
if (GrainInterfaceUtils.IsAlwaysInterleave(method))
{
options.Add(typeof(InvokeMethodOptions).GetNameSyntax().Member(InvokeMethodOptions.AlwaysInterleave.ToString()));
}
if (GrainInterfaceUtils.IsNewTransactionRequired(method))
{
options.Add(typeof(InvokeMethodOptions).GetNameSyntax().Member(InvokeMethodOptions.TransactionRequiresNew.ToString()));
}
if (GrainInterfaceUtils.IsTransactionRequired(method))
{
options.Add(typeof(InvokeMethodOptions).GetNameSyntax().Member(InvokeMethodOptions.TransactionRequired.ToString()));
}
ExpressionSyntax allOptions;
if (options.Count <= 1)
{
allOptions = options.FirstOrDefault();
}
else
{
allOptions =
options.Aggregate((a, b) => SF.BinaryExpression(SyntaxKind.BitwiseOrExpression, a, b));
}
if (allOptions == null)
{
return(null);
}
return(SF.Argument(SF.NameColon("options"), SF.Token(SyntaxKind.None), allOptions));
}