Re: [RFC PATCH 1/9] rust: vmstate: add new type safe implementation

[Zhao Liu]

> > Very flexible and powerful. (I even think this code could be released as
> > a new public crate.)
> 
> It's probably not _that_ useful in general, unless you're implementing
> this kind of reflection... otherwise I would have found an existing
> solution. :) But yes, it's very powerful.

Personally, I feel that projects that glue C and Rust together require
similar tricks more, making them more challenging.

> Out of curiosity, I asked claude.ai to explain it and it said "This is
> a rather advanced use of Rust's type system and macro capabilities to
> do compile-time reflection - basically inspecting the types of struct
> fields without runtime overhead. While creative, this pattern isn't
> commonly needed in everyday Rust code."
> 
> When fed the initial comment from the Rust forum it said "your comment
> about wanting to access <T as SomeTrait>::SOMETHING for a field's type
> is a classic serialization pattern - often used to get things like
> type IDs, serialization formats, or field metadata at compile time".
> That's actually pretty impressive; the LLM was also impressed and it
> started asking me more about it ("Are you building a custom
> serialization framework from scratch, or extending an existing one?").

Incredible, commercial LLMs are so proficient in Rust and provide such
professional comments (even a bit off-topic, it feels like LLMs could
even review patches).

Thank you for providing this interesting example. LLMs are indeed the
good tool to help get started with and practice Rust.

Thanks,
Zhao