Function winnow::combinator::separated_pair

pub fn separated_pair<I, O1, O2, O3, E: ParserError<I>, F, G, H>(
    first: F,
    sep: G,
    second: H
) -> impl Parser<I, (O1, O3), E>
where
    I: Stream,
    F: Parser<I, O1, E>,
    G: Parser<I, O2, E>,
    H: Parser<I, O3, E>,

Sequence three parsers, only returning the values of the first and third.

Arguments

• first The first parser to apply.
• sep The separator parser to apply.
• second The second parser to apply.

See also seq to generalize this across any number of fields.

Example

use winnow::combinator::separated_pair;
use winnow::token::tag;

let mut parser = separated_pair("abc", "|", "efg");

assert_eq!(parser.parse_peek("abc|efg"), Ok(("", ("abc", "efg"))));
assert_eq!(parser.parse_peek("abc|efghij"), Ok(("hij", ("abc", "efg"))));
assert_eq!(parser.parse_peek(""), Err(ErrMode::Backtrack(InputError::new("", ErrorKind::Tag))));
assert_eq!(parser.parse_peek("123"), Err(ErrMode::Backtrack(InputError::new("123", ErrorKind::Tag))));