internal FlagDefinition(CallFlagAttribute attribute, ParameterInfo param)
{
if (!param.HasDefaultValue)
{
throw new ArgumentException($"The parameter {param} does not have a default value.");
}
DefaultValue = param.DefaultValue;
ShortKey = attribute.ShortKey;
LongKey = attribute.LongKey;
Description = attribute.Description;
Type = param.ParameterType;
RequiresInput = Type != typeof(bool);
Parameter = param;
ParamName = NameAttribute.GetFor(param);
}
private ArgumentInfo(ParameterInfo parameter, CallInfo call, bool useDefault)
{
Parameter = parameter;
UseDefault = useDefault;
IsDense = DenseAttribute.ExistsOn(parameter);
Type = Parameter.ParameterType;
DefaultValue = Parameter.DefaultValue;
IsRawArgument = RawArgumentsAttribute.ExistsOn(parameter);
HasDefaultValue = Parameter.HasDefaultValue;
Name = NameAttribute.GetFor(Parameter);
Parent = call;
Flag = CallFlagAttribute.GetFor(Parameter);
if (IsDense && Flag != null)
{
throw new InvalidOperationException("Cannot have a dense flag parameter");
}
}
internal static IEnumerable <ArgumentInfo[]> BuildPermetations(CallInfo call)
{
var parameters = call.Method.GetParameters().TakeWhile(p => !CallFlagAttribute.ExistsOn(p));
var required = parameters.Where(p => !p.HasDefaultValue);
var optional = parameters.Where(p => p.HasDefaultValue);
var requiredMask = Enumerable.Range(0, required.Count())
.Select(v => true)
.ToArray();
foreach (var optionalMask in IEnumerableUtil.BooleanMask(optional.Count()))
{
var fullMask = requiredMask.Concat(optionalMask).ToArray();
var args = parameters.Select((p, i) => new ArgumentInfo(p, call, !fullMask[i])).ToArray();
if (args.Count(a => a.IsDense) <= 1)
{
yield return(args);
}
}
}