forked from sin365/AxibugEmuOnline
41 lines
1.4 KiB
C#
41 lines
1.4 KiB
C#
#region Copyright notice and license
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#endregion
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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namespace Google.Protobuf.Reflection
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{
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/// <summary>
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/// Internal class containing utility methods when working with descriptors.
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/// </summary>
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internal static class DescriptorUtil
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{
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/// <summary>
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/// Equivalent to Func[TInput, int, TOutput] but usable in .NET 2.0. Only used to convert
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/// arrays.
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/// </summary>
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internal delegate TOutput IndexedConverter<TInput, TOutput>(TInput element, int index);
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/// <summary>
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/// Converts the given array into a read-only list, applying the specified conversion to
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/// each input element.
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/// </summary>
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internal static IList<TOutput> ConvertAndMakeReadOnly<TInput, TOutput>
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(IList<TInput> input, IndexedConverter<TInput, TOutput> converter)
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{
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TOutput[] array = new TOutput[input.Count];
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for (int i = 0; i < array.Length; i++)
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{
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array[i] = converter(input[i], i);
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}
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return new ReadOnlyCollection<TOutput>(array);
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}
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}
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} |