Store generic with trait bound

generics_over_generics.rs

use std::path::Path;
use std::io::Read;

pub struct AnimalFile<P> {
	reader: P,
}

impl<P> AnimalFile<P>
where
	P: NewBufRead<std::fs::File>,
{
	pub fn new<F: AsRef<Path>>(fp: F) -> AnimalFile<P> {
		let file = std::fs::OpenOptions::new().read(true).open(fp.as_ref()).unwrap();
		Self {
			reader: P::new_buf_read(file),
		}
	}
}

pub trait NewBufRead<R: Read>: std::io::BufRead {
    fn new_buf_read(r: R) -> Self;
}

impl<R: Read> NewBufRead<R> for std::io::BufReader<R> {
    fn new_buf_read(r: R) -> Self {
        Self::new(r)
    }
}

fn main() {
	
}