1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21

//! An uninhabitable type meaning it can never happen.
//!
//! To be replaced with `!` once it is stable.

use std::error::Error;
use std::fmt;

#[derive(Debug)]
pub enum Never {}

impl fmt::Display for Never {
    fn fmt(&self, _: &mut fmt::Formatter<'_>) -> fmt::Result {
        match *self {}
    }
}

impl Error for Never {
    fn description(&self) -> &str {
        match *self {}
    }
}