diff options
Diffstat (limited to 'csharp/src/Google.Protobuf/Preconditions.cs')
-rw-r--r-- | csharp/src/Google.Protobuf/Preconditions.cs | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/csharp/src/Google.Protobuf/Preconditions.cs b/csharp/src/Google.Protobuf/Preconditions.cs new file mode 100644 index 00000000..ff3bd0f1 --- /dev/null +++ b/csharp/src/Google.Protobuf/Preconditions.cs @@ -0,0 +1,74 @@ +#region Copyright notice and license +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +#endregion + +using System; + +namespace Google.Protobuf +{ + /// <summary> + /// Helper methods for throwing exceptions + /// </summary> + public static class Preconditions + { + /// <summary> + /// Throws an ArgumentNullException if the given value is null, otherwise + /// return the value to the caller. + /// </summary> + public static T CheckNotNull<T>(T value, string name) where T : class + { + if (value == null) + { + throw new ArgumentNullException(name); + } + return value; + } + + /// <summary> + /// Throws an ArgumentNullException if the given value is null, otherwise + /// return the value to the caller. + /// </summary> + /// <remarks> + /// This is equivalent to <see cref="CheckNotNull"/> but without the type parameter + /// constraint. In most cases, the constraint is useful to prevent you from calling CheckNotNull + /// with a value type - but it gets in the way if either you want to use it with a nullable + /// value type, or you want to use it with an unconstrained type parameter. + /// </remarks> + internal static T CheckNotNullUnconstrained<T>(T value, string name) + { + if (value == null) + { + throw new ArgumentNullException(name); + } + return value; + } + } +}
\ No newline at end of file |