NickStrupat

using System;
using System.Runtime.CompilerServices;

internal class InstanceReEntrancyGuard : IDisposable {
	private class Ref<T> where T : struct { public T Value { get; set; } }
	private static readonly ConditionalWeakTable<Object, Ref<Boolean>> reEntranceEphemerons = new ConditionalWeakTable<Object, Ref<Boolean>>();
	private readonly Ref<Boolean> hasEnteredOnce;
	public InstanceReEntrancyGuard(Object instance, String reEntrantMessage = null) {
		hasEnteredOnce = reEntranceEphemerons.GetValue(instance, x => new Ref<Boolean>());
		if (hasEnteredOnce.Value)

NickStrupat

[assembly:Ref.Ref.Ref, @ref.@ref.Ref]
namespace Ref {
	[Ref, @ref.@ref.Ref] public struct Ref {
		[Ref, @ref.@ref.Ref] public class RefAttribute : Attribute {}
		[Ref, @ref.@ref.Ref] public Ref @ref([Ref, @ref.@ref.Ref] ref Ref @ref) { return @ref.@ref(ref @ref); }
	}
}

namespace @ref {
	[Ref, Ref.Ref.Ref] public class @ref {

NickStrupat

[assembly:Out.Out.Out, @out.@out.Out]
namespace Out {
	[Out, @out.@out.Out] public struct Out {
		[Out, @out.@out.Out] public class OutAttribute : Attribute {}
		[Out, @out.@out.Out] public Out @out([Out, @out.@out.Out] out Out @out) { return @out.@out(out @out); }
	}
}

namespace @out {
	[Out, Out.Out.Out] public class @out {

NickStrupat

using System;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;

public static class Struct {
	public static Boolean ReferenceEquals<T>(ref T a, ref T b) where T : struct => Cache<T>.Func(ref a, ref b);

	private static class Cache<T> where T : struct {
		public delegate Boolean ReferenceEqualsDelegate(ref T a, ref T b);

NickStrupat

public class TypeSwitch : ReadOnlyTypeSwitch {
	public TypeSwitch Case<T>(Action<T> action) {
		matches.Add(typeof(T), x => action((T) x));
		return this;
	}

	public ReadOnlyTypeSwitch Default(Action @default) {
		this.@default = @default ?? delegate { };
		return this;
	}

NickStrupat

using System;
using System.Threading;

struct LightMutex {
	private volatile Int32 inUse;
	
	public void Lock() {
		var spinWait = new SpinWait();
		while (Interlocked.Exchange(ref inUse, 1) == 1)
			spinWait.SpinOnce();

NickStrupat

using System;
using System.Threading.Tasks;
using System.Windows.Input;

class AsyncCommand : ICommand {
	public Boolean CanExecute(Object parameter = null) => !IsRunning;

	public event EventHandler CanExecuteChanged = delegate { };

	public async void Execute(Object parameter = null) {

NickStrupat

	interface ISoftDeletable {
		DateTime? Deleted { get; set; }
	}

	class MyEntity : ISoftDeletable {
		public Int64 Id { get; set; }
		public String Name { get; set; }
		public DateTime? Deleted { get; set; }
	}

NickStrupat

private ImmutableArray<THandler> handlers = ImmutableArray<THandler>.Empty;

internal static void Add<THandler>(ref ImmutableArray<Action<THandler>> handlers, Action<THandler> handler) {
	if (handler == null)
		return;

	ImmutableArray<Action<THandler>> initial, computed;
	do {
		initial = InterlockedGet(ref handlers);
		computed = initial.Add(handler);

NickStrupat

public interface IInnumerable {
	// *crickets*
}