[−][src]Function numerus::numerus_lib::int_to_roman::int_to_roman_upper
pub fn int_to_roman_upper(number: i32) -> Option<String>
Convert the given numer into an upper roman numeral. This function fails if the given numer is not representable in the roman numerical system (i.e. number <= 0)
use numerus::int_to_roman_lower; let wrong_number = 0; match int_to_roman_lower(wrong_number) { Some(_) => assert!(false), None => assert!(true) };