/// <summary>Converts an enumerable to an array.</summary>
/// <param name="source">The enumerable to convert.</param>
/// <returns>The resulting array.</returns>
internal static T[] ToArray <T>(IEnumerable <T> source)
{
Debug.Assert(source != null);
if (source is ICollection <T> collection)
{
int count = collection.Count;
if (count == 0)
{
return(Array.Empty <T>());
}
var result = new T[count];
collection.CopyTo(result, arrayIndex: 0);
return(result);
}
var builder = new LargeArrayBuilder <T>(initialize: true);
builder.AddRange(source);
return(builder.ToArray());
}
/// <summary> /// Adds a range of items to this builder. /// </summary> /// <param name="items">The sequence to add.</param> public void AddRange(IEnumerable <T> items) => _builder.AddRange(items);