protected static bool EqualOperator(ValueObject left, ValueObject right)
{
if (ReferenceEquals(left, null) ^ ReferenceEquals(right, null))
{
return(false);
}
return(ReferenceEquals(left, null) || left.Equals(right));
}
/// <summary>
/// 相等
/// </summary>
/// <param name="left">值对象,派生自ValueObject</param>
/// <param name="right">值对象,派生自ValueObject</param>
/// <returns>是否相等</returns>
protected static bool EqualOperator(ValueObject left, ValueObject right)
{
if (left is null ^ right is null)
{
return(false);
}
//到这里要么两个都为Null，要么都不为Null
return(left is null || left.Equals(right));
}
/// <summary>
/// 两个值对象是否相等
/// </summary>
/// <param name="left">左边值对象</param>
/// <param name="right">右边值对象</param>
/// <returns>是否相等</returns>
protected static bool EqualOperator(ValueObject left, ValueObject right)
{
//针对整型类型和 bool 预定义了二元 ^ 运算符。
//对于整型类型，^ 会计算其操作数的按位异或。
//对于 bool 操作数，^ 计算其操作数的逻辑异或；即，当且仅当其一个操作数为 true 时，结果才为 true
if (ReferenceEquals(left, null) ^ ReferenceEquals(right, null))
{
return(false);
}
return(ReferenceEquals(left, null) || left.Equals(right));
}