public Argument <T> DefineOption <T>(string name, T defaultValue, Func <string, T> valueConverter, bool isRequired)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentException(Strings.NameMissing, "name");
}
if (DefinedParameters.Any())
{
throw new InvalidOperationException(Strings.OptionsMustBeDefinedBeforeParameters);
}
var names = ParseOptionNameList(name);
var option = new Argument <T>(_definedCommand, names, defaultValue, isRequired);
_options.Add(option);
if (_activeCommand != _definedCommand)
{
return(option);
}
try
{
if (Parser.TryParseOption(option.GetDisplayName(), option.Names, valueConverter, isRequired, out T value, out bool specified))
{
option.SetValue(value);
}
else if (specified)
{
// No value was provided, but the option was specified and a value wasn't required
option.MarkSpecified();
}
}
