Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/Mono.Cecil.Metadata/MetadataToken.cs

@@ -0,0 +1,94 @@
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2015 Jb Evain
+// Copyright (c) 2008 - 2011 Novell, Inc.
+//
+// Licensed under the MIT/X11 license.
+//
+
+using System;
+
+namespace Mono.Cecil {
+
+	public struct MetadataToken : IEquatable<MetadataToken> {
+
+		readonly uint token;
+
+		public uint RID	{
+			get { return token & 0x00ffffff; }
+		}
+
+		public TokenType TokenType {
+			get { return (TokenType) (token & 0xff000000); }
+		}
+
+		public static readonly MetadataToken Zero = new MetadataToken ((uint) 0);
+
+		public MetadataToken (uint token)
+		{
+			this.token = token;
+		}
+
+		public MetadataToken (TokenType type)
+			: this (type, 0)
+		{
+		}
+
+		public MetadataToken (TokenType type, uint rid)
+		{
+			token = (uint) type | rid;
+		}
+
+		public MetadataToken (TokenType type, int rid)
+		{
+			token = (uint) type | (uint) rid;
+		}
+
+		public int ToInt32 ()
+		{
+			return (int) token;
+		}
+
+		public uint ToUInt32 ()
+		{
+			return token;
+		}
+
+		public override int GetHashCode ()
+		{
+			return (int) token;
+		}
+
+		public bool Equals (MetadataToken other)
+		{
+			return other.token == token;
+		}
+
+		public override bool Equals (object obj)
+		{
+			if (obj is MetadataToken) {
+				var other = (MetadataToken) obj;
+				return other.token == token;
+			}
+
+			return false;
+		}
+
+		public static bool operator == (MetadataToken one, MetadataToken other)
+		{
+			return one.token == other.token;
+		}
+
+		public static bool operator != (MetadataToken one, MetadataToken other)
+		{
+			return one.token != other.token;
+		}
+
+		public override string ToString ()
+		{
+			return string.Format ("[{0}:0x{1}]", TokenType, RID.ToString ("x4"));
+		}
+	}
+}