54 lines
1.9 KiB
C#
54 lines
1.9 KiB
C#
//
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// ReverseEnumerable.cs
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//
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// Author:
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// Leszek Ciesielski (skolima@gmail.com)
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//
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// (C) 2011 Leszek Ciesielski
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections.Generic;
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namespace Microsoft.Build.Internal
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{
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internal class ReverseEnumerable<T> : IEnumerable<T>
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{
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LinkedList<T> backingList;
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public ReverseEnumerable (LinkedList<T> list)
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{
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backingList = list;
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}
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public IEnumerator<T> GetEnumerator ()
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{
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for (var node = backingList.Last; node != null; node = node.Previous)
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yield return node.Value;
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}
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System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator ()
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{
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return GetEnumerator ();
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}
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}
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}
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