library/std/src/io/util.rs

#![allow(missing_copy_implementations)]

#[cfg(test)]
mod tests;

use crate::io::{self, BufRead, Empty};

#[stable(feature = "rust1", since = "1.0.0")]
impl BufRead for Empty {
    #[inline]
    fn fill_buf(&mut self) -> io::Result<&[u8]> {
        Ok(&[])
    }

    #[inline]
    fn consume(&mut self, _n: usize) {}

    #[inline]
    fn has_data_left(&mut self) -> io::Result<bool> {
        Ok(false)
    }

    #[inline]
    fn read_until(&mut self, _byte: u8, _buf: &mut Vec<u8>) -> io::Result<usize> {
        Ok(0)
    }

    #[inline]
    fn skip_until(&mut self, _byte: u8) -> io::Result<usize> {
        Ok(0)
    }

    #[inline]
    fn read_line(&mut self, _buf: &mut String) -> io::Result<usize> {
        Ok(0)
    }
}