Generics on Rust - StudentRecord Generic No-Extra

student_record.rs

use std::collections::HashMap;

pub struct StudentRecord<T> {
    student_id: u32,
    marks: Vec<T>,
}

impl<T> StudentRecord<T> {
    pub fn new(student_id: u32) -> Self {
        Self {
            student_id,
            marks: Vec::new(),
        }
    }

    pub fn add_mark(&mut self, mark: T) {
        self.marks.push(mark);
    }
}