[−][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 uppercase roman numeral. This function fails if the given numer is not representable in the roman numerical system (i.e. number <= 0).
An error example
use numerus::int_to_roman_upper; /* there's no representation for 0 in the roman numerical system */ let wrong_number = 0; match int_to_roman_upper(wrong_number) { Some(_) => assert!(false), None => assert!(true) };
A correct convertion
use numerus::int_to_roman_upper; let convertible_number = 101; match int_to_roman_upper(convertible_number) { Some(roman) => assert_eq!(roman, "CI"), None => assert!(false) };