public WeakKeyReference(T key, WeakKeyComparer <T> comparer)
: base(key)
{
// retain the object's hash code immediately so that even if the target is GC'ed we will be
// able to find and remove the dead weak reference.
HashCode = comparer.GetHashCode(key);
}
/// <summary>
///A test for GetHashCode
///</summary>
void GetHashCodeTestHelper <E>(E e)
where E : class
{
WeakKeyComparer <E> target = new WeakKeyComparer <E>()
{
_equalityComparer = EqualityComparer <E> .Default
};
var key = new WeakKey <E>()
{
_elementReference = new WeakReference(e)
};
int hash1 = target.GetHashCode(ref key, true);
key.SetValue(e, false);
int hash2 = target.GetHashCode(ref key, false);
Assert.AreEqual(hash1, hash2);
}
public WeakKeyReference(T target, WeakKeyComparer <T> comparer)
: base(target, false)
{
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
// retain the object's hash code immediately so that even
// if the target is GC'ed we will be able to find and
// remove the dead weak reference.
this.HashCode = comparer.GetHashCode(target);
}
