79 lines
2.8 KiB
C#
79 lines
2.8 KiB
C#
//
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// Pair.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2011 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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namespace Mono.CodeContracts.Static.DataStructures {
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class Pair<K, V> : IEquatable<Pair<K, V>> {
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private static readonly bool KeyIsReferenceType = default(K) == null;
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private static readonly bool ValueIsReferenceType = default(V) == null;
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public readonly K Key;
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public readonly V Value;
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public Pair (K key, V value)
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{
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this.Key = key;
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this.Value = value;
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}
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#region IEquatable<Pair<K,V>> Members
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public bool Equals (Pair<K, V> other)
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{
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var keyEquatable = ((object) this.Key) as IEquatable<K>;
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bool keysAreEqual = keyEquatable != null ? keyEquatable.Equals (other.Key) : Equals (this.Key, other.Key);
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if (!keysAreEqual)
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return false;
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var valueEquatable = ((object) this.Value) as IEquatable<V>;
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return valueEquatable != null ? valueEquatable.Equals (other.Value) : Equals (this.Value, other.Value);
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}
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#endregion
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public override int GetHashCode ()
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{
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return (!KeyIsReferenceType || ((object) this.Key) != null ? this.Key.GetHashCode () : 0)
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+ 13*(!ValueIsReferenceType || ((object) this.Value) != null ? this.Value.GetHashCode () : 0);
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}
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public override string ToString ()
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{
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return string.Format ("({0}, {1})",
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(!KeyIsReferenceType || ((object) this.Key) != null) ? this.Key.ToString () : "<null>",
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(!ValueIsReferenceType || ((object) this.Value) != null) ? this.Value.ToString () : "<null>");
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}
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}
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static class Pair {
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public static Pair<K,V> From<K,V>(K key, V value)
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{
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return new Pair<K, V> (key, value);
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}
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}
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}
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