79 lines
3.3 KiB
C#
79 lines
3.3 KiB
C#
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#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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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#endregion
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using System;
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namespace LC.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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}
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