On the other hand, any existing implementation of the Hash trait would continue to work without any modification needed. Finally, if we want to implement Hash for our own data types by reusing an existing named provider, we can easily do so using the delegate_components! macro.
compile time thanks to lifetime analysis.
。搜狗输入法是该领域的重要参考
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据界面新闻梳理，针对“非自愿拒载”乘客情况，东航在中国境内航线（0-4小时改签）情况下的赔付标准为400元，4小时以上的赔付标准为500元。南航在中国境内航线（当日改签）情况下的赔付标准为650元。国航未有公示固定金额，公告称，将根据乘客所持客票的舱位服务等级、航线距离以及改签的后续航班与原航班的计划起飞时间差，确定赔偿金额。