#if !NET_4_6
using System;
using System.Collections.Generic;

namespace LinqInternal.Collections.ThreadSafe
{
    internal interface IBucket<T> : IEnumerable<T>
    {
        int Count { get; }

        void CopyTo(T[] array, int arrayIndex);

        bool Exchange(int index, T item, out T previous);

        bool Insert(int index, T item);

        bool Insert(int index, T item, out T previous);

        bool RemoveAt(int index);

        bool RemoveAt(int index, out T previous);

        bool RemoveAt(int index, Predicate<T> check);

        void Set(int index, T item, out bool isNew);

        bool TryGet(int index, out T value);

        bool Update(int index, Func<T, T> itemUpdateFactory, Predicate<T> check, out bool isEmpty);

        IEnumerable<T> Where(Predicate<T> check);
    }
}
#endif