43 lines
1.4 KiB
C#
43 lines
1.4 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.Contracts;
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namespace DataStructures.SkipListSpace
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{
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public partial class SkipList<TKey, TValue> : IEnumerable<TValue>, ICollection<TValue>
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where TKey : IComparable<TKey>
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{
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[Serializable]
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private class SkipNode<TKey, TValue>
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where TKey : IComparable<TKey>
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{
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public TKey Key { get; set; }
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public TValue Value { get; set; }
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//Each link contains next level successor in skip list
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public IList<SkipNode<TKey, TValue>> Links { get; private set; }
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[ContractInvariantMethod]
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private void ObjectInvariant()
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{
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Contract.Invariant(Links != null);
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Contract.Invariant(Links.Count > 0);
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}
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public SkipNode(int level)
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{
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Contract.Requires<ArgumentOutOfRangeException>(level > 0);
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Links = new List<SkipNode<TKey, TValue>>(level);
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}
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public SkipNode(int level, TKey key, TValue value)
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{
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Contract.Requires<ArgumentNullException>(key != null);
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Contract.Requires<ArgumentOutOfRangeException>(level > 0);
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Key = key;
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Value = value;
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Links = new List<SkipNode<TKey, TValue>>(level);
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}
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}
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}
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}
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