在其他模块中包含 main.rs

Question

I'm new to rust. I know, for calling a module in same folder I need to write mod <module name> for other folder mod <module name>{ include!("path to module") } . I want to include main.rs in extra.rs , present in same folder, so that I can use Summary trait for structure feed in extra.rs . I get error recursion limit reached while expanding the macro 'include' . How I can include main.rs in extra.rs ? Is there a better way to write the same code?

error

error: recursion limit reached while expanding the macro `include`
 --> src/extra.rs:3:5
  |
3 |     include!("main.rs");
  |     ^^^^^^^^^^^^^^^^^^^^
  |
  = help: consider adding a `#![recursion_limit="256"]` attribute to your crate

error: aborting due to previous error

error: could not compile `office_manager`.

main.rs

mod extra;

pub trait Summary {
    fn print_summry(&self) -> String;
}

pub struct Tweet {
    name: String,
    message: String
}

impl Summary for Tweet {
    fn print_summry(&self) -> String {
        format!("{}: {}",self.name,self.message)
    }
}

fn main() {

    let t = extra::Feed {
        name: String::from("Hanuman"),
        message: String::from("Jai sri Ram")
    };

    println!("{}",t.print_summry());

}

extra.rs

mod main {
    include!("main.rs");
}


pub struct Feed {
    pub name: String,
    pub message: String
}

impl Summary for Feed {
    fn print_summry(&self) -> String {
        format!("{}: {}",self.name,self.message)
    }
}

Answer 1

Elements of parent module can be accessed with help of super . Therefore adding use super::*; on top or using super::Summary both works. But it is better to use super::Summary as it don't include everything of main.rs .