/// <summary>
/// 获取指定的 <see cref="KeyValuePair{TKey, TValue}"/> 中的键值的哈希代码。
/// </summary>
/// <param name="obj">要获取哈希代码的 <see cref="KeyValuePair{TKey, TValue}"/> 对象。</param>
/// <param name="computed">已经计算过哈希代码的对象。</param>
/// <returns>根据 <paramref name="obj"/> 中的键值得到的哈希代码。</returns>
protected override int GetHashCodeCore(
KeyValuePair <TKey, TValue> obj, ISet <object> computed)
{
var keyComparer = StructuralEqualityComparer.OfType(obj.Key?.GetType());
var valueComparer = StructuralEqualityComparer.OfType(obj.Value?.GetType());
return(this.CombineHashCode(
keyComparer.GetHashCode(obj, computed),
valueComparer.GetHashCode(obj, computed)));
}
/// <summary>
/// 确定两个指定的 <see cref="KeyValuePair{TKey, TValue}"/> 中的键值是否相等。
/// </summary>
/// <param name="x">要比较的第一个 <see cref="KeyValuePair{TKey, TValue}"/> 对象。</param>
/// <param name="y">要比较的第二个 <see cref="KeyValuePair{TKey, TValue}"/> 对象。</param>
/// <param name="compared">已经比较过的对象。</param>
/// <returns>如果 <paramref name="x"/> 和 <paramref name="y"/> 中的键值相等，
/// 则为 <see langword="true"/>；否则为 <see langword="false"/>。</returns>
protected override bool EqualsCore(
KeyValuePair <TKey, TValue> x, KeyValuePair <TKey, TValue> y, ISet <ObjectPair> compared)
{
if (x.Key?.GetType() != y.Key?.GetType())
{
return(false);
}
if (x.Value?.GetType() != y.Value?.GetType())
{
return(false);
}
var keyComparer = StructuralEqualityComparer.OfType(x.Key?.GetType());
var valueComparer = StructuralEqualityComparer.OfType(x.Value?.GetType());
return(keyComparer.Equals(x.Key, y.Key, compared) &&
valueComparer.Equals(x.Value, y.Value, compared));
}