use nom::branch::alt;
use nom::bytes::complete::tag;
use nom::combinator::map;
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Paren {
Left,
Right,
}
impl Paren {
pub fn parse(input: &str) -> nom::IResult<&str, Self> {
alt((
map(tag("("), |_| Self::Left),
map(tag(")"), |_| Self::Right),
))(input)
}
}
impl std::fmt::Display for Paren {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Paren::Left => write!(f, "("),
Paren::Right => write!(f, ")"),
}
}
}