Function nom::character::complete::space1

pub fn space1<T, E: ParseError<T>>(input: T) -> IResult<T, T, E> where
    T: InputTakeAtPosition,
    <T as InputTakeAtPosition>::Item: AsChar + Clone, 

Recognizes one or more spaces and tabs.

complete version: Will return an error if there’s not enough input data, or the whole input if no terminating token is found (a non space character).

Example

fn parser(input: &str) -> IResult<&str, &str> {
    space1(input)
}

assert_eq!(parser(" \t21c"), Ok(("21c", " \t")));
assert_eq!(parser("H2"), Err(Err::Error(("H2", ErrorKind::Space))));
assert_eq!(parser(""), Err(Err::Error(("", ErrorKind::Space))));