Jon Skeet | 68380f0 | 2015-07-30 13:03:45 +0100 | [diff] [blame] | 1 | #region Copyright notice and license |
| 2 | // Protocol Buffers - Google's data interchange format |
| 3 | // Copyright 2008 Google Inc. All rights reserved. |
| 4 | // https://developers.google.com/protocol-buffers/ |
| 5 | // |
| 6 | // Redistribution and use in source and binary forms, with or without |
| 7 | // modification, are permitted provided that the following conditions are |
| 8 | // met: |
| 9 | // |
| 10 | // * Redistributions of source code must retain the above copyright |
| 11 | // notice, this list of conditions and the following disclaimer. |
| 12 | // * Redistributions in binary form must reproduce the above |
| 13 | // copyright notice, this list of conditions and the following disclaimer |
| 14 | // in the documentation and/or other materials provided with the |
| 15 | // distribution. |
| 16 | // * Neither the name of Google Inc. nor the names of its |
| 17 | // contributors may be used to endorse or promote products derived from |
| 18 | // this software without specific prior written permission. |
| 19 | // |
| 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | #endregion |
| 32 | |
| 33 | using System; |
| 34 | |
| 35 | namespace Google.Protobuf |
| 36 | { |
| 37 | /// <summary> |
| 38 | /// Helper methods for throwing exceptions |
| 39 | /// </summary> |
| 40 | public static class Preconditions |
| 41 | { |
| 42 | /// <summary> |
| 43 | /// Throws an ArgumentNullException if the given value is null, otherwise |
| 44 | /// return the value to the caller. |
| 45 | /// </summary> |
| 46 | public static T CheckNotNull<T>(T value, string name) where T : class |
| 47 | { |
| 48 | if (value == null) |
| 49 | { |
| 50 | throw new ArgumentNullException(name); |
| 51 | } |
| 52 | return value; |
| 53 | } |
| 54 | |
| 55 | /// <summary> |
| 56 | /// Throws an ArgumentNullException if the given value is null, otherwise |
| 57 | /// return the value to the caller. |
| 58 | /// </summary> |
| 59 | /// <remarks> |
Jon Skeet | 30e8157 | 2015-08-05 06:39:43 +0100 | [diff] [blame^] | 60 | /// This is equivalent to <see cref="CheckNotNull{T}(T, string)"/> but without the type parameter |
Jon Skeet | 68380f0 | 2015-07-30 13:03:45 +0100 | [diff] [blame] | 61 | /// constraint. In most cases, the constraint is useful to prevent you from calling CheckNotNull |
| 62 | /// with a value type - but it gets in the way if either you want to use it with a nullable |
| 63 | /// value type, or you want to use it with an unconstrained type parameter. |
| 64 | /// </remarks> |
| 65 | internal static T CheckNotNullUnconstrained<T>(T value, string name) |
| 66 | { |
| 67 | if (value == null) |
| 68 | { |
| 69 | throw new ArgumentNullException(name); |
| 70 | } |
| 71 | return value; |
| 72 | } |
| 73 | } |
csharptest | 71f662c | 2011-05-20 15:15:34 -0500 | [diff] [blame] | 74 | } |