static EqualityComparer()
{
var t = typeof(T);
if (t == typeof(string))
{
_default = (EqualityComparer <T>)(object) new InternalStringComparer();
return;
}
if (t == typeof(int))
{
_default = (EqualityComparer <T>)(object) new IntEqualityComparer();
return;
}
if (t.IsEnum && Enum.GetUnderlyingType(t) == typeof(int))
{
_default = new EnumIntEqualityComparer <T> ();
return;
}
if (typeof(IEquatable <T>).IsAssignableFrom(t))
{
_default = (EqualityComparer <T>)Activator.CreateInstance(typeof(GenericEqualityComparer <>).MakeGenericType(t));
}
else
{
_default = new DefaultComparer <T> ();
}
}
static EqualityComparer()
{
if (typeof(IEquatable <T>).IsAssignableFrom(typeof(T)))
{
_default = (EqualityComparer <T>)Activator.CreateInstance(typeof(GenericEqualityComparer <>).MakeGenericType(typeof(T)));
}
else
{
_default = new DefaultComparer();
}
}
static Comparer()
{
if (typeof(T).IsValueType)
{
Default = new DefaultComparerValueType();
}
else
{
Default = new DefaultComparer();
}
}
static Comparer()
{
#if NOT_PFX
if (typeof(IComparable <T>).IsAssignableFrom(typeof(T)))
{
_default = (Comparer <T>)Activator.CreateInstance(typeof(GenericComparer <>).MakeGenericType(typeof(T)));
}
else
#endif
_default = new DefaultComparer();
}
static EqualityComparer()
{
if (typeof(T) == typeof(string))
{
_default = (EqualityComparer <T>)(object) new InternalStringComparer();
return;
}
if (typeof(IEquatable <T>).IsAssignableFrom(typeof(T)))
{
_default = (EqualityComparer <T>)Activator.CreateInstance(typeof(GenericEqualityComparer <>).MakeGenericType(typeof(T)));
}
else
{
_default = new DefaultComparer();
}
}
static EqualityComparer()
{
// Need to use the GenericEqualityComparer, but can't because
// cannot instantiate the type yet, because T needs to implement IEquatable<T>
Default = new DefaultComparer();
}
