/// <summary>
/// Determines whether this tag is subset of <paramref name="other"/>
/// (meaning each subtag of this tag is also subtag of <paramref name="other"/>)
/// </summary>
public bool IsSubsetOf(LanguageTag other)
{
if (Language.HasValue && other.Language != Language)
{
return(false);
}
if (Script.HasValue && other.Script != Script)
{
return(false);
}
if (Region.HasValue && other.Region != Region)
{
return(false);
}
if (Variants.Except(other.Variants).Any())
{
return(false);
}
if (Extensions.Except(other.Extensions).Any())
{
return(false);
}
return(PrivateUse.IsEmpty || other.PrivateUse == PrivateUse);
}