Import YamlDotNet.

Assets/YamlDotNet/Core/Version.cs

@@ -0,0 +1,82 @@
+// This file is part of YamlDotNet - A .NET library for YAML.
+// Copyright (c) Antoine Aubry and contributors
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy of
+// this software and associated documentation files (the "Software"), to deal in
+// the Software without restriction, including without limitation the rights to
+// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+// of the Software, and to permit persons to whom the Software is furnished to do
+// so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+using System;
+
+namespace YamlDotNet.Core
+{
+    /// <summary>
+    /// Specifies the version of the YAML language.
+    /// </summary>
+    public sealed class Version
+    {
+        /// <summary>
+        /// Gets the major version number.
+        /// </summary>
+        public int Major { get; }
+
+        /// <summary>
+        /// Gets the minor version number.
+        /// </summary>
+        public int Minor { get; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Version"/> class.
+        /// </summary>
+        /// <param name="major">The major version number.</param>
+        /// <param name="minor">The minor version number.</param>
+        public Version(int major, int minor)
+        {
+            Major = major >= 0
+                ? major
+                : throw new ArgumentOutOfRangeException(nameof(major), $"{major} should be >= 0");
+
+            Minor = minor >= 0
+                ? minor
+                : throw new ArgumentOutOfRangeException(nameof(minor), $"{minor} should be >= 0");
+        }
+
+        /// <summary>
+        /// Determines whether the specified System.Object is equal to the current System.Object.
+        /// </summary>
+        /// <param name="obj">The System.Object to compare with the current System.Object.</param>
+        /// <returns>
+        /// true if the specified System.Object is equal to the current System.Object; otherwise, false.
+        /// </returns>
+        public override bool Equals(object? obj)
+        {
+            return obj is Version other
+                && Major == other.Major
+                && Minor == other.Minor;
+        }
+
+        /// <summary>
+        /// Serves as a hash function for a particular type.
+        /// </summary>
+        /// <returns>
+        /// A hash code for the current <see cref="T:System.Object"/>.
+        /// </returns>
+        public override int GetHashCode()
+        {
+            return HashCode.CombineHashCodes(Major.GetHashCode(), Minor.GetHashCode());
+        }
+    }
+}