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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections;
namespace System.Collections.Generic
{
internal static class EqualOnlyComparerHelper
{
public static bool Equals(sbyte x, sbyte y)
{
return x == y;
}
public static bool Equals(byte x, byte y)
{
return x == y;
}
public static bool Equals(short x, short y)
{
return x == y;
}
public static bool Equals(ushort x, ushort y)
{
return x == y;
}
public static bool Equals(int x, int y)
{
return x == y;
}
public static bool Equals(uint x, uint y)
{
return x == y;
}
public static bool Equals(long x, long y)
{
return x == y;
}
public static bool Equals(ulong x, ulong y)
{
return x == y;
}
public static bool Equals(IntPtr x, IntPtr y)
{
return x == y;
}
public static bool Equals(UIntPtr x, UIntPtr y)
{
return x == y;
}
public static bool Equals(float x, float y)
{
return x == y;
}
public static bool Equals(double x, double y)
{
return x == y;
}
public static bool Equals(decimal x, decimal y)
{
return x == y;
}
public static bool Equals(string x, string y)
{
return x == y;
}
}
/// <summary>
/// Minimum comparer for Array.IndexOf/Contains which each Array needs. So it's important to be small.
/// </summary>
/// <typeparam name="T"></typeparam>
internal class EqualOnlyComparer<T>
{
// Force the compiler to inline this method. Normally the compiler will shy away from inlining such
// a large function, however in this case the method compiles down to almost nothing so help the
// compiler out a bit with this hint. Once the compiler supports bottom-up codegen analysis it should
// inline this without a hint.
[System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]
public static bool Equals(T x, T y)
{
// Specialized Comparers
if (typeof(T) == typeof(System.SByte))
return EqualOnlyComparerHelper.Equals(((System.SByte)(object)(x)), ((System.SByte)(object)(y)));
else if (typeof(T) == typeof(System.Byte))
return EqualOnlyComparerHelper.Equals(((System.Byte)(object)(x)), ((System.Byte)(object)(y)));
else if (typeof(T) == typeof(System.Int16))
return EqualOnlyComparerHelper.Equals(((System.Int16)(object)(x)), ((System.Int16)(object)(y)));
else if (typeof(T) == typeof(System.UInt16))
return EqualOnlyComparerHelper.Equals(((System.UInt16)(object)(x)), ((System.UInt16)(object)(y)));
else if (typeof(T) == typeof(System.Int32))
return EqualOnlyComparerHelper.Equals(((System.Int32)(object)(x)), ((System.Int32)(object)(y)));
else if (typeof(T) == typeof(System.UInt32))
return EqualOnlyComparerHelper.Equals(((System.UInt32)(object)(x)), ((System.UInt32)(object)(y)));
else if (typeof(T) == typeof(System.Int64))
return EqualOnlyComparerHelper.Equals(((System.Int64)(object)(x)), ((System.Int64)(object)(y)));
else if (typeof(T) == typeof(System.UInt64))
return EqualOnlyComparerHelper.Equals(((System.UInt64)(object)(x)), ((System.UInt64)(object)(y)));
else if (typeof(T) == typeof(System.IntPtr))
return EqualOnlyComparerHelper.Equals(((System.IntPtr)(object)(x)), ((System.IntPtr)(object)(y)));
else if (typeof(T) == typeof(System.UIntPtr))
return EqualOnlyComparerHelper.Equals(((System.UIntPtr)(object)(x)), ((System.UIntPtr)(object)(y)));
else if (typeof(T) == typeof(System.Single))
return EqualOnlyComparerHelper.Equals(((System.Single)(object)(x)), ((System.Single)(object)(y)));
else if (typeof(T) == typeof(System.Double))
return EqualOnlyComparerHelper.Equals(((System.Double)(object)(x)), ((System.Double)(object)(y)));
else if (typeof(T) == typeof(System.Decimal))
return EqualOnlyComparerHelper.Equals(((System.Decimal)(object)(x)), ((System.Decimal)(object)(y)));
else if (typeof(T) == typeof(System.String))
return EqualOnlyComparerHelper.Equals(((System.String)(object)(x)), ((System.String)(object)(y)));
// Default Comparer
if (x == null)
{
return y == null;
}
if (y == null)
{
return false;
}
return x.Equals(y);
}
}
}
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