ところで、ひょっとすると今のLLMは`PhantomData<fn() -> T>`の意味とかも説明できたりするのかなと思って"What's the difference between `PhantomData<T>` and `PhantomData<fn() -> T>` in Rust?"と入れてみたら、やはり流暢にでまかせを垂れてきたので安心した(?)(`PhantomData<fn() -> T>`は実際には`T`について共変)

- **Ownership**: Using `PhantomData<fn() -> T>` indicates that the containing type does not own `T` and does not imply any variance relationship with `T`. It is a way to express that the type is related to `T` in a way that is more about type-level programming rather than ownership.
0

If you have a fediverse account, you can quote this note from your own instance. Search https://fedibird.com/users/tesaguri/statuses/114248646324959340 on your instance and quote it. (Note that quoting is not supported in Mastodon.)