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use std::borrow::Cow;
use nom::{
branch::alt,
bytes::complete::tag,
character::complete::digit0,
combinator::recognize,
sequence::{delimited, pair, separated_pair},
IResult,
};
#[cfg_attr(test, derive(PartialEq))]
#[cfg_attr(feature = "ser", derive(serde::Serialize))]
#[derive(Debug, Clone)]
pub struct Cookie<'a> {
pub value: Cow<'a, str>,
}
impl Cookie<'_> {
pub(crate) fn parse(input: &str) -> Option<(&str, Cookie)> {
parse_internal(input).ok()
}
pub fn into_owned(self) -> Cookie<'static> {
Cookie {
value: self.value.into_owned().into(),
}
}
}
#[inline]
fn parse_internal(input: &str) -> IResult<&str, Cookie, ()> {
let (input, value) = recognize(delimited(
tag("["),
alt((
separated_pair(digit0, tag("/"), digit0),
pair(digit0, tag("%")),
)),
tag("]"),
))(input)?;
Ok((
input,
Cookie {
value: value.into(),
},
))
}
#[test]
fn parse() {
assert_eq!(
Cookie::parse("[1/10]"),
Some((
"",
Cookie {
value: "[1/10]".into()
}
))
);
assert_eq!(
Cookie::parse("[1/1000]"),
Some((
"",
Cookie {
value: "[1/1000]".into()
}
))
);
assert_eq!(
Cookie::parse("[10%]"),
Some((
"",
Cookie {
value: "[10%]".into()
}
))
);
assert_eq!(
Cookie::parse("[%]"),
Some((
"",
Cookie {
value: "[%]".into()
}
))
);
assert_eq!(
Cookie::parse("[/]"),
Some((
"",
Cookie {
value: "[/]".into()
}
))
);
assert_eq!(
Cookie::parse("[100/]"),
Some((
"",
Cookie {
value: "[100/]".into()
}
))
);
assert_eq!(
Cookie::parse("[/100]"),
Some((
"",
Cookie {
value: "[/100]".into()
}
))
);
assert!(Cookie::parse("[10% ]").is_none());
assert!(Cookie::parse("[1//100]").is_none());
assert!(Cookie::parse("[1\\100]").is_none());
assert!(Cookie::parse("[10%%]").is_none());
}