56 lines
2.0 KiB
C#
56 lines
2.0 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;
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namespace Google.Protobuf
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{
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/// <summary>
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/// Helper methods for throwing exceptions when preconditions are not met.
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/// </summary>
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/// <remarks>
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/// This class is used internally and by generated code; it is not particularly
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/// expected to be used from application code, although nothing prevents it
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/// from being used that way.
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/// </remarks>
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public static class ProtoPreconditions
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{
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/// <summary>
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/// Throws an ArgumentNullException if the given value is null, otherwise
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/// return the value to the caller.
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/// </summary>
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public static T CheckNotNull<T>(T value, string name) where T : class
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{
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if (value == null)
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{
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throw new ArgumentNullException(name);
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}
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return value;
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}
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/// <summary>
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/// Throws an ArgumentNullException if the given value is null, otherwise
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/// return the value to the caller.
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/// </summary>
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/// <remarks>
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/// This is equivalent to <see cref="CheckNotNull{T}(T, string)"/> but without the type parameter
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/// constraint. In most cases, the constraint is useful to prevent you from calling CheckNotNull
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/// with a value type - but it gets in the way if either you want to use it with a nullable
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/// value type, or you want to use it with an unconstrained type parameter.
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/// </remarks>
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internal static T CheckNotNullUnconstrained<T>(T value, string name)
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{
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if (value == null)
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{
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throw new ArgumentNullException(name);
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}
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return value;
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}
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}
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} |