Function numerus::numerus_lib::roman_to_int::roman_to_int

pub fn roman_to_int(number: &str) -> Option<i32>

Convert given roman numeral into an integer. This function accepts, at the same time, both uppercase and lowercase character.

The function fails if any invalid character is meet.

    use numerus::roman_to_int;
 
    let wrong_roman = "XCK";
    match roman_to_int(wrong_roman) {
        Some(_) => assert!(false),
        None => assert!(true)
    }