Function char

pub fn char<I, Error>(c: char) -> impl Parser<I, Output = char, Error = Error>
where
    Error: ParseError<I>,
    I: Input,
    <I as Input>::Item: AsChar,

Recognizes one character.

Example

fn parser(i: &str) -> IResult<&str, char> {
    char('a')(i)
}
assert_eq!(parser("abc"), Ok(("bc", 'a')));
assert_eq!(parser("bc"), Err(Err::Error(Error::new("bc", ErrorKind::Char))));
assert_eq!(parser(""), Err(Err::Incomplete(Needed::new(1))));