1.txt

error[E0308]: mismatched types                                                                                                                                                                                                                     
   --> src/protocols/irc/types.rs:156:16                                                                                                                                                                                                           
    |                                                                                                                                                                                                                                              
156 |         return &self.users;                                                                                                                                                                                                                  
    |                ^^^^^^^^^^^ expected trait types::user::User, found struct `protocols::irc::types::IRCUser`                                                                                                                                   
    |                                                                                                                                                                                                                                              
    = note: expected type `&std::vec::Vec<&dyn types::user::User>`                                                                                                                                                                                 
               found type `&std::vec::Vec<&'a protocols::irc::types::IRCUser<'a>>`  

2.rs

use crate::types::User;

pub trait Room {
    fn name(&self) -> String;
    fn display_name(&self) -> String;
    fn topic(&self) -> Option<String>;
    fn identifier(&self) -> String;
    fn users(&self) -> &Vec<&User>;
}

// ...

pub struct IRCChannel<'a> {
    network: &'a IRCNetwork<'a>,
    name: String,
    topic: Option<String>,
    users: Vec<&'a IRCUser<'a>>
}

// ...

impl<'a> Room for IRCChannel<'a> {
    fn name(&self) -> String {
        return self.name;
    }

    fn display_name(&self) -> String {
        return self.name;
    }

    fn topic(&self) -> Option<String> {
        return self.topic;
    }

    fn identifier(&self) -> String {
        return format!("channel:{}@{}", self.name(), self.network.identifier());
    }

    fn users(&self) -> &Vec<&User> {
        return &self.users;
    }
}

// ...

impl<'a> User for IRCUser<'a> {
    // ...
}