Struct CheckDigitAlgorithm 

pub struct CheckDigitAlgorithm {}

This algorithm is known by many names: the “Luhn Formula”, “The IBM Check”, “Mod 10”, and is officially specified in “Annex B to ISO/IEC 7812, Part 1” and in “ANSI X4.13”. It is used as the check scheme on credit cards such as Visa, Master Card, and American Express.

Issues

It catches all single digit errors, but does not catch transposition errors with “0” and “9” (meaning “09” → “90” and “90” → “09” are not caught).

Trait Implementations

impl Calculator<u8> for CheckDigitAlgorithm

fn name(&self) -> &'static str

Return the name of this algorithm.

fn calculate(&self, s: &str) -> Result<u8, CheckDigitError>

Calculate a check digit for the provided string.

fn number_of_check_digit_chars(&self) -> usize

Return the number of characters used as the check digit. Currently it is assumed that these are the n right-most characters in the input string.

fn create(&self, s: &str) -> Result<String, CheckDigitError>

Create a new string with the original data plus check digit.

fn validate<S>(&self, s: S) -> Result<(), CheckDigitError>

where Self: Sized, S: AsRef<str>,

Validate that the string is valid and that it contains a valid check digit.

fn is_valid<S>(&self, s: S) -> bool

where Self: Sized, S: AsRef<str>,

Returns true if the provided string includes a valid check digit, else false. The default implementation relies on the validate method.

impl Clone for CheckDigitAlgorithm

fn clone(&self) -> CheckDigitAlgorithm

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CheckDigitAlgorithm

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CheckDigitAlgorithm

fn default() -> CheckDigitAlgorithm

Returns the “default value” for a type.

impl Copy for CheckDigitAlgorithm