ISEbd-22.Semelenova_Y_G_AirFighter_Base/AirFighter/AirFighter/SetGeneric.cs

using System.Numerics;

namespace AirFighter.Generics
{
    internal class SetGeneric<T>
    where T : class
    {
        private readonly List<T?> _places;
        public int Count => _places.Count;
        private readonly int _maxCount;
        public SetGeneric(int count)
        {
            _maxCount = count;
            _places = new List<T?>(count);
        }
        public int Insert(T fighter)
        {
            return Insert(fighter, 0);

        }
        public int Insert(T fighter, int position)
        {
            if (position < 0 || position >= _maxCount) return -1;
            _places.Insert(position, fighter);
            return position;
        }
        public bool Remove(int position)
        {
            if ((position < 0) || (position > _maxCount)) return false;
            _places.RemoveAt(position);
            return true;
        }
        public T? this[int position]
        {
            get
            {
                if (position < 0 || position > _maxCount)
                    return null;
                return _places[position];
            }
            set
            {
                if (position < 0 || position > _maxCount)
                    return;
                _places[position] = value;
            }
        }
        public IEnumerable<T?> GetAirFighter(int? maxAirFighter = null)
        {
            for (int i = 0; i < _places.Count; ++i)
            {
                yield return _places[i];
                if (maxAirFighter.HasValue && i == maxAirFighter.Value)
                {
                    yield break;
                }
            }
        }
    }
}