use core::fmt::Display;
#[derive(Debug)]
pub struct ParseError {}
impl Display for ParseError {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
write!(f, "ParseError")
}
}
impl std::error::Error for ParseError {}
#[test]
fn test_err_display() {
let e = ParseError {};
let x = format!("{e}");
assert_eq!(x, "ParseError")
}