Function rocket::mtls::x509::der_parser::asn1_rs::nom::bytes::streaming::tag

source · 
pub fn tag<T, Input, Error>(tag: T) -> impl Fn(Input)
where
    Error: ParseError<Input>,
    Input: InputTake + InputLength + Compare<T>,
    T: InputLength + Clone,
Available on crate feature mtls only.
Expand description

Recognizes a pattern.

The input data will be compared to the tag combinator’s argument and will return the part of the input that matches the argument.

§Example

use nom::bytes::streaming::tag;

fn parser(s: &str) -> IResult<&str, &str> {
  tag("Hello")(s)
}

assert_eq!(parser("Hello, World!"), Ok((", World!", "Hello")));
assert_eq!(parser("Something"), Err(Err::Error(Error::new("Something", ErrorKind::Tag))));
assert_eq!(parser("S"), Err(Err::Error(Error::new("S", ErrorKind::Tag))));
assert_eq!(parser("H"), Err(Err::Incomplete(Needed::new(4))));