Function memoir::parsers::natural

source · [−]

pub fn natural<O: FromStr<Err = ParseIntError>>() -> Parser<O>

Expand description

Natural number.

use memoir::*;

let p = natural::<u64>();

assert!(p.parse("0").is_ok());
assert!(p.parse("123").is_ok());
assert!(p.parse("043").is_ok());
assert!(p.parse("-55").is_err());