Function rocket::mtls::oid::asn1_rs::nom::bytes::complete::take

source ยท
pub fn take<C, Input, Error>(count: C) -> impl Fn(Input)
where Error: ParseError<Input>, Input: InputIter + InputTake, C: ToUsize,
Available on crate feature mtls only.
Expand description

Returns an input slice containing the first N input elements (Input[..N]).

It will return Err(Err::Error((_, ErrorKind::Eof))) if the input is shorter than the argument.


use nom::bytes::complete::take;

fn take6(s: &str) -> IResult<&str, &str> {

assert_eq!(take6("1234567"), Ok(("7", "123456")));
assert_eq!(take6("things"), Ok(("", "things")));
assert_eq!(take6("short"), Err(Err::Error(Error::new("short", ErrorKind::Eof))));
assert_eq!(take6(""), Err(Err::Error(Error::new("", ErrorKind::Eof))));

The units that are taken will depend on the input type. For example, for a &str it will take a number of charโ€™s, whereas for a &[u8] it will take that many u8โ€™s:

use nom::error::Error;
use nom::bytes::complete::take;

assert_eq!(take::<_, _, Error<_>>(1usize)("๐Ÿ’™"), Ok(("", "๐Ÿ’™")));
assert_eq!(take::<_, _, Error<_>>(1usize)("๐Ÿ’™".as_bytes()), Ok((b"\x9F\x92\x99".as_ref(), b"\xF0".as_ref())));