GroupJoin<TLeft, TRight, TLeftDuration, TRightDuration, TResult>
                    sealed class GroupJoin<TLeft, TRight, TLeftDuration, TRightDuration, TResult> : Producer<TResult, _<TLeft, TRight, TLeftDuration, TRightDuration, TResult>>
                
                using System.Collections.Generic;
using System.Reactive.Disposables;
using System.Reactive.Subjects;
using System.Runtime.CompilerServices;
namespace System.Reactive.Linq.ObservableImpl
{
    [System.Runtime.CompilerServices.NullableContext(1)]
    [System.Runtime.CompilerServices.Nullable(new byte[] {
        0,
        1,
        1,
        1,
        1,
        1,
        1,
        1
    })]
    internal sealed class GroupJoin<[System.Runtime.CompilerServices.Nullable(2)] TLeft, [System.Runtime.CompilerServices.Nullable(2)] TRight, [System.Runtime.CompilerServices.Nullable(2)] TLeftDuration, [System.Runtime.CompilerServices.Nullable(2)] TRightDuration, [System.Runtime.CompilerServices.Nullable(2)] TResult> : Producer<TResult, GroupJoin<TLeft, TRight, TLeftDuration, TRightDuration, TResult>._>
    {
        [System.Runtime.CompilerServices.Nullable(new byte[] {
            0,
            1
        })]
        internal sealed class _ : IdentitySink<TResult>
        {
            [System.Runtime.CompilerServices.Nullable(new byte[] {
                0,
                1
            })]
            private sealed class LeftObserver : SafeObserver<TLeft>
            {
                [System.Runtime.CompilerServices.Nullable(new byte[] {
                    0,
                    1
                })]
                private sealed class DurationObserver : SafeObserver<TLeftDuration>
                {
                    [System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0,
                        0,
                        0,
                        0
                    })]
                    private readonly LeftObserver _parent;
                    private readonly int _id;
                    private readonly IObserver<TRight> _group;
                    public DurationObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0,
                        0,
                        0,
                        0
                    })] LeftObserver parent, int id, IObserver<TRight> group)
                    {
                        _parent = parent;
                        _id = id;
                        _group = group;
                    }
                    public override void OnNext(TLeftDuration value)
                    {
                        _parent.Expire(_id, _group, this);
                    }
                    public override void OnError(Exception error)
                    {
                        _parent.OnError(error);
                    }
                    public override void OnCompleted()
                    {
                        _parent.Expire(_id, _group, this);
                    }
                }
                [System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0,
                    0,
                    0,
                    0
                })]
                private readonly _ _parent;
                public LeftObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0,
                    0,
                    0,
                    0
                })] _ parent)
                {
                    _parent = parent;
                }
                private void Expire(int id, IObserver<TRight> group, IDisposable resource)
                {
                    lock (_parent._gate) {
                        if (_parent._leftMap.Remove(id))
                            group.OnCompleted();
                    }
                    _parent._group.Remove(resource);
                }
                public override void OnNext(TLeft value)
                {
                    Subject<TRight> subject = new Subject<TRight>();
                    int num = default(int);
                    int rightID = default(int);
                    lock (_parent._gate) {
                        num = _parent._leftID++;
                        rightID = _parent._rightID;
                        _parent._leftMap.Add(num, subject);
                    }
                    WindowObservable<TRight> arg = new WindowObservable<TRight>(subject, _parent._refCount);
                    IObservable<TLeftDuration> source;
                    try {
                        source = _parent._leftDurationSelector(value);
                    } catch (Exception error) {
                        OnError(error);
                        return;
                    }
                    DurationObserver durationObserver = new DurationObserver(this, num, subject);
                    _parent._group.Add(durationObserver);
                    durationObserver.SetResource(ObservableExtensions.SubscribeSafe<TLeftDuration>(source, (IObserver<TLeftDuration>)durationObserver));
                    TResult value2;
                    try {
                        value2 = _parent._resultSelector(value, arg);
                    } catch (Exception error2) {
                        OnError(error2);
                        return;
                    }
                    lock (_parent._gate) {
                        _parent.ForwardOnNext(value2);
                        foreach (KeyValuePair<int, TRight> item in _parent._rightMap) {
                            if (item.Key < rightID)
                                subject.OnNext(item.Value);
                        }
                    }
                }
                public override void OnError(Exception error)
                {
                    lock (_parent._gate) {
                        foreach (KeyValuePair<int, IObserver<TRight>> item in _parent._leftMap) {
                            item.Value.OnError(error);
                        }
                        _parent.ForwardOnError(error);
                    }
                }
                public override void OnCompleted()
                {
                    lock (_parent._gate) {
                        _parent.ForwardOnCompleted();
                    }
                    Dispose();
                }
            }
            [System.Runtime.CompilerServices.Nullable(new byte[] {
                0,
                1
            })]
            private sealed class RightObserver : SafeObserver<TRight>
            {
                [System.Runtime.CompilerServices.Nullable(new byte[] {
                    0,
                    1
                })]
                private sealed class DurationObserver : SafeObserver<TRightDuration>
                {
                    [System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0,
                        0,
                        0,
                        0
                    })]
                    private readonly RightObserver _parent;
                    private readonly int _id;
                    public DurationObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0,
                        0,
                        0,
                        0
                    })] RightObserver parent, int id)
                    {
                        _parent = parent;
                        _id = id;
                    }
                    public override void OnNext(TRightDuration value)
                    {
                        _parent.Expire(_id, this);
                    }
                    public override void OnError(Exception error)
                    {
                        _parent.OnError(error);
                    }
                    public override void OnCompleted()
                    {
                        _parent.Expire(_id, this);
                    }
                }
                [System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0,
                    0,
                    0,
                    0
                })]
                private readonly _ _parent;
                public RightObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0,
                    0,
                    0,
                    0
                })] _ parent)
                {
                    _parent = parent;
                }
                private void Expire(int id, IDisposable resource)
                {
                    lock (_parent._gate) {
                        _parent._rightMap.Remove(id);
                    }
                    _parent._group.Remove(resource);
                }
                public override void OnNext(TRight value)
                {
                    int num = default(int);
                    int leftID = default(int);
                    lock (_parent._gate) {
                        num = _parent._rightID++;
                        leftID = _parent._leftID;
                        _parent._rightMap.Add(num, value);
                    }
                    IObservable<TRightDuration> source;
                    try {
                        source = _parent._rightDurationSelector(value);
                    } catch (Exception error) {
                        OnError(error);
                        return;
                    }
                    DurationObserver durationObserver = new DurationObserver(this, num);
                    _parent._group.Add(durationObserver);
                    durationObserver.SetResource(ObservableExtensions.SubscribeSafe<TRightDuration>(source, (IObserver<TRightDuration>)durationObserver));
                    lock (_parent._gate) {
                        foreach (KeyValuePair<int, IObserver<TRight>> item in _parent._leftMap) {
                            if (item.Key < leftID)
                                item.Value.OnNext(value);
                        }
                    }
                }
                public override void OnError(Exception error)
                {
                    lock (_parent._gate) {
                        foreach (KeyValuePair<int, IObserver<TRight>> item in _parent._leftMap) {
                            item.Value.OnError(error);
                        }
                        _parent.ForwardOnError(error);
                    }
                }
                public override void OnCompleted()
                {
                    Dispose();
                }
            }
            private readonly object _gate = new object();
            private readonly CompositeDisposable _group = new CompositeDisposable();
            private readonly RefCountDisposable _refCount;
            private readonly SortedDictionary<int, IObserver<TRight>> _leftMap;
            private readonly SortedDictionary<int, TRight> _rightMap;
            private readonly Func<TLeft, IObservable<TLeftDuration>> _leftDurationSelector;
            private readonly Func<TRight, IObservable<TRightDuration>> _rightDurationSelector;
            private readonly Func<TLeft, IObservable<TRight>, TResult> _resultSelector;
            private int _leftID;
            private int _rightID;
            public _(GroupJoin<TLeft, TRight, TLeftDuration, TRightDuration, TResult> parent, IObserver<TResult> observer)
                : base(observer)
            {
                _refCount = new RefCountDisposable(_group);
                _leftMap = new SortedDictionary<int, IObserver<TRight>>();
                _rightMap = new SortedDictionary<int, TRight>();
                _leftDurationSelector = parent._leftDurationSelector;
                _rightDurationSelector = parent._rightDurationSelector;
                _resultSelector = parent._resultSelector;
            }
            public void Run(GroupJoin<TLeft, TRight, TLeftDuration, TRightDuration, TResult> parent)
            {
                LeftObserver leftObserver = new LeftObserver(this);
                _group.Add(leftObserver);
                RightObserver rightObserver = new RightObserver(this);
                _group.Add(rightObserver);
                leftObserver.SetResource(ObservableExtensions.SubscribeSafe<TLeft>(parent._left, (IObserver<TLeft>)leftObserver));
                rightObserver.SetResource(ObservableExtensions.SubscribeSafe<TRight>(parent._right, (IObserver<TRight>)rightObserver));
                SetUpstream(_refCount);
            }
        }
        private readonly IObservable<TLeft> _left;
        private readonly IObservable<TRight> _right;
        private readonly Func<TLeft, IObservable<TLeftDuration>> _leftDurationSelector;
        private readonly Func<TRight, IObservable<TRightDuration>> _rightDurationSelector;
        private readonly Func<TLeft, IObservable<TRight>, TResult> _resultSelector;
        public GroupJoin(IObservable<TLeft> left, IObservable<TRight> right, Func<TLeft, IObservable<TLeftDuration>> leftDurationSelector, Func<TRight, IObservable<TRightDuration>> rightDurationSelector, Func<TLeft, IObservable<TRight>, TResult> resultSelector)
        {
            _left = left;
            _right = right;
            _leftDurationSelector = leftDurationSelector;
            _rightDurationSelector = rightDurationSelector;
            _resultSelector = resultSelector;
        }
        [return: System.Runtime.CompilerServices.Nullable(new byte[] {
            1,
            0,
            0,
            0,
            0,
            0
        })]
        protected override _ CreateSink(IObserver<TResult> observer)
        {
            return new _(this, observer);
        }
        protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
            1,
            0,
            0,
            0,
            0,
            0
        })] _ sink)
        {
            sink.Run(this);
        }
    }
}