bparse

Function range

Source 
pub fn range<T>(lo: T, hi: T) -> ElementRange<T>
where
    T: PartialOrd + Copy,
Expand description

Returns a new pattern that will match an element in the closed interval [lo, hi]

use bparse::{Pattern, range};

let pattern = range(b'a', b'z');
assert_eq!(pattern.eval(b"b"), Some(1));