Macro define with struct attribute

help
1

Is there anyone can tell me how to define a macro with Struct attribute?

main.rs

struct Pupil {
name: String,
info: String
}

...

#[defined_model(Pupil)]
fn modify(name: String, info: String) {
}

lib.rs

#[proc_macro_attribute]
pub fn defined_mode(attr: TokenStream, input: TokenStream) -> TokenStream {
???
}
2

Macros run before the compiler knows which types exist, so you can't look up the definition of structs unless the macro is annotated on the struct definition itself.

3

Then in order to use the struct inside of the macro, do i have to derive it? using #derive macro

4

What is your macro supposed to do? The answer depends on what you need.

5

I need to use struct inside of macro.
let's assume that I create a module and all the constructor and member functions of it should be user-defined outside of the macro.

6

That's impossible. Macros have access only to the information they are provided.

7

You can parse the Pupil from the input and then expand to code like Pupil::new(), Pupil::do_something() or whatever if that's what you need.