public override void PopulateValue(object target, IArgumentList args, IDiagnostics diags)
{
var arg = args.GetLastArg(OptionId);
var valueString = arg?.Value ?? attribute.DefaultValue;
if (valueString is null)
{
return;
}
var converter = TypeDescriptor.GetConverter(Property.PropertyType);
if (!converter.CanConvertFrom(typeof(string)))
{
diags.ReportError(
"Type converter for option '{0}' cannot convert from '{1}'.",
arg.Option.PrefixedName, typeof(string).Name);
return;
}
object value;
try {
value = converter.ConvertFromInvariantString(valueString);
} catch (NotSupportedException) {
diags.ReportError("Invalid value '{1}' in '{0}{1}'", arg.Spelling, valueString);
return;
}
Property.SetValue(target, value);
}
