Breaking News: Grepper is joining You.com. Read the official announcement!

struct recursion in rust

Rustacean answered on March 31, 2023 Popularity 6/10 Helpfulness 2/10

answer struct recursion in rust

struct recursion in rust

Comment

#[derive(Debug)]
pub struct WorkEnvironment {
    pub grade: Link,
}

pub type Link = Option<Box<Worker>>;

#[derive(Debug, PartialEq, Eq, Clone)]
pub struct Worker {
    pub role: String,
    pub name: String,
    pub next: Link,
}

impl WorkEnvironment {
    pub fn new() -> WorkEnvironment {
        WorkEnvironment { grade: None }
    }

    pub fn add_worker(&mut self, role: String, name: String) {
        match self.grade.clone() {
            Some(worker_box) => {
                let new_worker_box = Box::new(Worker {
                    role,
                    name,
                    next: Some(Box::new(*worker_box)),
                });
                self.grade = Some(new_worker_box);
            }
            None => {
                let new_worker_box = Box::new(Worker {
                    role,
                    name,
                    next: None,
                });
                self.grade = Some(new_worker_box);
            }
        }
    }

    pub fn remove_worker(&mut self) -> Option<String> {
        match self.grade.take() { // can't always take ownership. Might lose reference.
            Some(last_worker) => {
                let last_last_worker: Link = match last_worker.next {
                    Some(worker) => Some(worker),
                    None => None,
                    
                };
                self.grade = last_last_worker;
                return Some(last_worker.name);
            }
            None => {
                // self.grade = None;
                return None;
            }
        }
    }

    pub fn last_worker(&mut self) -> Option<(String, String)> {
        match self.grade.clone() {
            Some(last_worker) => return Some((last_worker.name, last_worker.role)),
            None => return None,
        }
    }
}

Popularity 6/10 Helpfulness 2/10 Language rust

Source: Grepper

Tags: recursion rust struct

Link to this answer
Share Copy Link

Contributed on Mar 31 2023

Rustacean

0 Answers Avg Quality 2/10

struct recursion in rust

Contents

More Related Answers

struct recursion in rust

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.