// ==++==
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// ==--==
// =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
//
// ImergeHelper.cs
//
// <OWNER>igoro</OWNER>
//
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 
using System.Collections.Generic;
 
namespace System.Linq.Parallel
{
    /// <summary>
    /// Used as a stand-in for replaceable merge algorithms. Alternative implementations
    /// are chosen based on the style of merge required. 
    /// </summary>
    /// <typeparam name="TInputOutput"></typeparam>
    internal interface IMergeHelper<TInputOutput>
    {
 
        // Begins execution of the merge.
        void Execute();
 
        // Return an enumerator that yields the merged output.
        IEnumerator<TInputOutput> GetEnumerator();
 
        // Returns the merged output as an array.
        TInputOutput[] GetResultsAsArray();
    }
}