Read nom Input From Inside A Struct

//! ```cargo
//! [dependencies]
//! nom = "7.1.3"
//! ```

use nom::character::complete::alphanumeric1;
use nom::character::complete::space1;
use nom::multi::separated_list1;
use nom::IResult;

struct Parser {
  source: Option<String>
}

impl Parser {
  pub fn parse(&self) -> IResult<&str, Vec<&str>> {
    let (source, result) = separated_list1(
      space1, alphanumeric1
    )(self.source.as_ref().unwrap().as_str())?;
    Ok((source, result))
  }
}


fn main() {
  let source = "the quick brown fox".to_string();
  let p = Parser {
    source: Some(source)
  };
  dbg!(p.parse().unwrap().1);

}