public ValidationErrors Build()
{
if (this.r == null)
{
return(null);
}
return(ValidationErrors.Join(this.r));
}
// TODO: cut down allocations
public static ValidationErrors ValidateList<T>(this IEnumerable<T> array, Func<T, ValidationErrors> validator) =>
ValidationErrors.Join(array.Select((v, i) => validator(v).Nest(i.ToString())).ToArray());