ILSpy/ICSharpCode.Decompiler.Tests/TestCases/Pretty/DelegateConstruction.cs

// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
// 
// 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.Threading;

namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
{
	public static class DelegateConstruction
	{
		private class InstanceTests
		{
			public Action CaptureOfThis()
			{
				return delegate {
					this.CaptureOfThis();
				};
			}

			public Action CaptureOfThisAndParameter(int a)
			{
				return delegate {
					this.CaptureOfThisAndParameter(a);
				};
			}

			public Action CaptureOfThisAndParameterInForEach(int a)
			{
				foreach (int item in Enumerable.Empty<int>()) {
					if (item > 0) {
						return delegate {
							this.CaptureOfThisAndParameter(item + a);
						};
					}
				}
				return null;
			}

			public Action CaptureOfThisAndParameterInForEachWithItemCopy(int a)
			{
				foreach (int item in Enumerable.Empty<int>()) {
					int copyOfItem = item;
					if (item > 0) {
						return delegate {
							this.CaptureOfThisAndParameter(item + a + copyOfItem);
						};
					}
				}
				return null;
			}

			public void LambdaInForLoop()
			{
				for (int i = 0; i < 100000; i++) {
					this.Bar(() => this.Foo());
				}
			}

			public int Foo()
			{
				return 0;
			}

			public void Bar(Func<int> f)
			{
			}

			private void Bug955()
			{
				new Thread((ThreadStart)delegate {
				});
			}
		}

		public static void Test(this string a)
		{
		}

		public static Action<string> ExtensionMethodUnbound()
		{
			return DelegateConstruction.Test;
		}

		public static Action ExtensionMethodBound()
		{
			return "abc".Test;
		}

		public static Action ExtensionMethodBoundOnNull()
		{
			return ((string)null).Test;
		}

		public static object StaticMethod()
		{
			return new Func<Action>(DelegateConstruction.ExtensionMethodBound);
		}

		public static object InstanceMethod()
		{
			return new Func<string>("hello".ToUpper);
		}

		public static object InstanceMethodOnNull()
		{
			return new Func<string>(((string)null).ToUpper);
		}

		public static List<Action<int>> AnonymousMethodStoreWithinLoop()
		{
			List<Action<int>> list = new List<Action<int>>();
			for (int i = 0; i < 10; i++) {
				int counter;
				list.Add(delegate(int x) {
					counter = x;
				});
			}
			return list;
		}

		public static List<Action<int>> AnonymousMethodStoreOutsideLoop()
		{
			List<Action<int>> list = new List<Action<int>>();
			int counter;
			for (int i = 0; i < 10; i++) {
				list.Add(delegate(int x) {
					counter = x;
				});
			}
			return list;
		}

		public static Action StaticAnonymousMethodNoClosure()
		{
			return delegate {
				Console.WriteLine();
			};
		}

		public static void NameConflict()
		{
			// i is captured variable,
			// j is parameter in anonymous method
			// l is local in anonymous method,
			// k is local in main method
			// Ensure that the decompiler doesn't introduce name conflicts
			List<Action<int>> list = new List<Action<int>>();
			for (int k = 0; k < 10; k++) {
				int i;
				for (i = 0; i < 10; i++) {
					list.Add(delegate(int j) {
						for (int l = 0; l < i; l += j) {
							Console.WriteLine();
						}
					});
				}
			}
		}

		public static void NameConflict2(int j)
		{
			List<Action<int>> list = new List<Action<int>>();
			for (int k = 0; k < 10; k++) {
				list.Add(delegate(int i) {
					Console.WriteLine(i);
				});
			}
		}

		public static Action<int> NameConflict3(int i)
		{
			return delegate(int j) {
				for (int k = 0; k < j; k++) {
					Console.WriteLine(k);
				}
			};
		}

		public static Func<int, Func<int, int>> CurriedAddition(int a)
		{
			return (int b) => (int c) => a + b + c;
		}

		public static Func<int, Func<int, Func<int, int>>> CurriedAddition2(int a)
		{
			return (int b) => (int c) => (int d) => a + b + c + d;
		}
	}
}