/// <summary>
/// Inserts a collection of elements into this deque.
/// </summary>
/// <param name="index">The index at which the collection is inserted.</param>
/// <param name="collection">The collection of elements to insert.</param>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="index"/> is not a valid index to an insertion point for the source.</exception>
public void InsertRange(Int32 index, IEnumerable <T> collection)
{
CheckNewIndexArgument(Count, index);
IReadOnlyCollection <T> source = DequeHelpers.ReifyCollection(collection);
Int32 collectionCount = source.Count;
// Overflow-safe check for "Count + collectionCount > Capacity"
if (collectionCount > Capacity - Count)
{
Capacity = checked (Count + collectionCount);
}
if (collectionCount == 0)
{
return;
}
DoInsertRange(index, source);
}
/// <summary>
/// Initializes a new instance of the <see cref="Deque<T>"/> class with the elements from the specified collection.
/// </summary>
/// <param name="collection">The collection. May not be <c>null</c>.</param>
public Deque(IEnumerable <T> collection)
{
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
IReadOnlyCollection <T> source = DequeHelpers.ReifyCollection(collection);
Int32 count = source.Count;
if (count > 0)
{
_buffer = new T[count];
DoInsertRange(0, source);
}
else
{
_buffer = new T[DefaultCapacity];
}
}