ILSpy/ICSharpCode.Decompiler/Tests/TestCases/Correctness/OverloadResolution.cs

// Copyright (c) 2016 Daniel Grunwald
// 
// 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;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ICSharpCode.Decompiler.Tests.TestCases.Correctness
{
	static class OverloadResolution
	{
		static void Main()
		{
			CallOverloadedMethod();
			TestBoxing();
			TestIssue180();
			TestExtensionMethod();
		}

		#region Simple Overloaded Method
		static void CallOverloadedMethod()
		{
			OverloadedMethod("(string)");
			OverloadedMethod((object)"(object)");
			OverloadedMethod(5);
			OverloadedMethod((object)5);
			OverloadedMethod(5L);
			OverloadedMethod((object)null);
			OverloadedMethod((string)null);
			OverloadedMethod((int?)null);
		}

		static void OverloadedMethod(object a)
		{
			Console.WriteLine("OverloadedMethod(object={0}, object.GetType()={1})", a, a != null ? a.GetType().Name : "null");
		}

		static void OverloadedMethod(int? a)
		{
			Console.WriteLine("OverloadedMethod(int?={0})", a);
		}

		static void OverloadedMethod(string a)
		{
			Console.WriteLine("OverloadedMethod(string={0})", a);
		}
		#endregion

		#region Boxing
		static void TestBoxing()
		{
			Print(1);
			Print((ushort)1);
			Print(null);
		}

		static void Print(object obj)
		{
			if (obj == null)
				Console.WriteLine("null");
			else
				Console.WriteLine("{0}: {1}", obj.GetType().Name, obj);
		}
		#endregion

		#region #180
		static void TestIssue180()
		{
			Issue180(null);
			Issue180(new object[1]);
			Issue180((object)new object[1]);
		}

		static void Issue180(object obj)
		{
			Console.WriteLine("#180: object");
		}

		static void Issue180(params object[] objs)
		{
			Console.WriteLine("#180: params object[]");
		}
		#endregion

		#region Extension Method
		static void TestExtensionMethod()
		{
			new object().ExtensionMethod();
			ExtensionMethod(null); // issue #167
		}

		public static void ExtensionMethod(this object obj)
		{
			Console.WriteLine("ExtensionMethod(obj)");
		}
		#endregion
	}
}