As I can make the vector is mutable inside struct

Question

As I can make the vector is mutable

pub struct Test<\'a>{
    vec: &\'a mut Vec,
}
impl<\'a> Test<\'a> {
    pub fn created         


        

Answer 1

Maybe you are looking for interior mutability. Please, do not use interior mutability loosely, read this first.

use std::cell::RefCell;

pub struct Test{
    vec: RefCell>,
}

impl Test {
    pub fn created()->Test {
        Test {vec: RefCell::new(Vec::new()) }
    }
    pub fn add(&self, value: i32){  
        self.vec.borrow_mut().push(value);
    }
}

fn main() {
    let test = Test::created();
    test.add(1i32);

    let test1 = Test::created();
    // test1 = test; // does not work anymore
}