While this instance lookup might seem trivial and obvious, it highlights a hidden superpower of the trait system, which is that it gives us dependency injection for free. Our Display implementation for Person is able to require an implementation of Display for Name inside the where clause, without explicitly declaring that dependency anywhere else. This means that when we define the Person struct, we don't have to declare up front that Name needs to implement Display. And similarly, the Display trait doesn't need to worry about how Person gets a Display instance for Name.
Welcome to your guide to Pips, the latest game in the New York Times catalogue.
，推荐阅读新收录的资料获取更多信息
2026-03-06 00:00:00:0 习近平王沪宁蔡奇丁薛祥李希韩正等在主席台就座。新收录的资料对此有专业解读
李燕锋：是的，以前大家更多盯着游戏，但现在网络沉迷问题从过去的“游戏成瘾”转向“短视频+游戏+社交”的复合依赖。开始觉得只是刷三五分钟短视频，后面不知不觉就半小时、两小时。