public static VariantCollection Create(Language?lang, Script?script, IEnumerable <Variant> variants)
{
VariantCollection.Builder builder = null;
foreach (var variant in variants)
{
if (builder == null)
{
builder = new VariantCollection.Builder(lang, script);
}
builder.Append(variant);
}
return((builder == null) ? new VariantCollection() : builder.ToCollection());
}
internal static VariantCollection TryParse(Language?lang, Script?script, LanguageTag.TokenEnumerator tokens)
{
var variant = tokens.TryParseVariant();
if (!variant.HasValue)
{
return(new VariantCollection());
}
var builder = new VariantCollection.Builder(lang, script);
do
{
builder.Append(variant.Value);
variant = tokens.TryParseVariant();
}while (variant.HasValue);
return(builder.ToCollection());
}
