niko
101 lines
4.1 KiB
C#
101 lines
4.1 KiB
C#
using System;
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namespace System.Collections.Generic
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{
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/// <summary>Provides a base class for implementations of the <see cref="T:System.Collections.Generic.IEqualityComparer`1" /> generic interface.</summary>
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/// <typeparam name="T">The type of objects to compare.</typeparam>
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// Token: 0x02000106 RID: 262
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[Serializable]
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public abstract class EqualityComparer<T> : IEqualityComparer<T>, IEqualityComparer
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{
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// Token: 0x06000CE8 RID: 3304 RVA: 0x00039D18 File Offset: 0x00037F18
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static EqualityComparer()
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{
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if (typeof(IEquatable<T>).IsAssignableFrom(typeof(T)))
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{
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EqualityComparer<T>._default = (EqualityComparer<T>)Activator.CreateInstance(typeof(GenericEqualityComparer<>).MakeGenericType(new Type[] { typeof(T) }));
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}
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else
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{
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EqualityComparer<T>._default = new EqualityComparer<T>.DefaultComparer();
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}
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}
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/// <summary>Returns a hash code for the specified object.</summary>
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/// <returns>A hash code for the specified object.</returns>
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/// <param name="obj">The <see cref="T:System.Object" /> for which a hash code is to be returned.</param>
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/// <exception cref="T:System.ArgumentNullException">The type of <paramref name="obj" /> is a reference type and <paramref name="obj" /> is null.-or-<paramref name="obj" /> is of a type that cannot be cast to type <paramref name="T" />.</exception>
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// Token: 0x06000CE9 RID: 3305 RVA: 0x00039D84 File Offset: 0x00037F84
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int IEqualityComparer.GetHashCode(object obj)
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{
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return this.GetHashCode((T)((object)obj));
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}
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/// <summary>Determines whether the specified objects are equal.</summary>
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/// <returns>true if the specified objects are equal; otherwise, false.</returns>
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/// <param name="x">The first object to compare.</param>
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/// <param name="y">The second object to compare.</param>
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/// <exception cref="T:System.ArgumentException">
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/// <paramref name="x" /> or <paramref name="y" /> is of a type that cannot be cast to type <paramref name="T" />.</exception>
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// Token: 0x06000CEA RID: 3306 RVA: 0x00039D94 File Offset: 0x00037F94
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bool IEqualityComparer.Equals(object x, object y)
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{
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return this.Equals((T)((object)x), (T)((object)y));
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}
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/// <summary>When overridden in a derived class, serves as a hash function for the specified object for hashing algorithms and data structures, such as a hash table.</summary>
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/// <returns>A hash code for the specified object.</returns>
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/// <param name="obj">The object for which to get a hash code.</param>
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/// <exception cref="T:System.ArgumentNullException">The type of <paramref name="obj" /> is a reference type and <paramref name="obj" /> is null.</exception>
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// Token: 0x06000CEB RID: 3307
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public abstract int GetHashCode(T obj);
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/// <summary>When overridden in a derived class, determines whether two objects of type <paramref name="T" /> are equal.</summary>
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/// <returns>true if the specified objects are equal; otherwise, false.</returns>
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/// <param name="x">The first object to compare.</param>
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/// <param name="y">The second object to compare.</param>
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// Token: 0x06000CEC RID: 3308
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public abstract bool Equals(T x, T y);
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/// <summary>Returns a default equality comparer for the type specified by the generic argument.</summary>
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/// <returns>The default instance of the <see cref="T:System.Collections.Generic.EqualityComparer`1" /> class for type <paramref name="T" />.</returns>
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// Token: 0x170001EE RID: 494
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// (get) Token: 0x06000CED RID: 3309 RVA: 0x00039DA8 File Offset: 0x00037FA8
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public static EqualityComparer<T> Default
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{
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get
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{
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return EqualityComparer<T>._default;
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}
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}
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// Token: 0x0400037B RID: 891
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private static readonly EqualityComparer<T> _default;
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// Token: 0x02000107 RID: 263
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[Serializable]
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private sealed class DefaultComparer : EqualityComparer<T>
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{
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// Token: 0x06000CEF RID: 3311 RVA: 0x00039DB8 File Offset: 0x00037FB8
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public override int GetHashCode(T obj)
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{
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if (obj == null)
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{
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return 0;
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}
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return obj.GetHashCode();
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}
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// Token: 0x06000CF0 RID: 3312 RVA: 0x00039DD4 File Offset: 0x00037FD4
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public override bool Equals(T x, T y)
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{
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if (x == null)
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{
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return y == null;
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}
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return x.Equals(y);
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}
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}
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}
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}
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