public bool TryGetValueForOption(IValueDescriptor valueDescriptor, out object value)
{
var children = Children
.Where(o => valueDescriptor.Name.IsMatch(o.Symbol))
.ToArray();
SymbolResult symbolResult = null;
if (children.Length > 1)
{
throw new ArgumentException($"Ambiguous match while trying to bind parameter {valueDescriptor.Name} among: {string.Join(",", children.Select(o => o.Name))}");
}
if (children.Length == 1)
{
symbolResult = children[0];
}
if (symbolResult is OptionResult &&
symbolResult.GetValueAs(valueDescriptor.Type) is SuccessfulArgumentResult successful)
{
value = successful.Value;
return(true);
}
else
{
value = null;
return(false);
}
}
public static T GetValueOrDefault <T>(this SymbolResult symbolResult)
{
ArgumentResult result = symbolResult.GetValueAs(typeof(T));
switch (result)
{
case SuccessfulArgumentResult successful:
return((T)successful.Value);
case FailedArgumentResult failed:
throw new InvalidOperationException(failed.ErrorMessage);
case NoArgumentResult _:
default:
return(default);
}
}
