use std::fmt::Display;
#[derive(Debug, PartialEq, Clone)]
pub enum Pop {
All,
First,
Last,
Mixed,
}
impl Display for Pop {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> std::fmt::Result {
match *self {
Pop::All => write!(f, "all"),
Pop::First => write!(f, "first"),
Pop::Last => write!(f, "last"),
Pop::Mixed => write!(f, "mixed"),
}
}
}