Struct Luhn

pub struct Luhn { /* private fields */ }

Luhn represents a thing that can generate or validate the Luhn character for a given input.

Implementations

impl Luhn

pub fn new<S>(alphabet: S) -> Result<Luhn, LuhnError>

where S: AsRef<str>,

Create a new Luhn instance from anything that can be coerced to a &str.

pub fn generate<S>(&self, s: S) -> Result<char, LuhnError>

where S: AsRef<str>,

Given an input string, generate the Luhn character.

Returns an error if the input string is empty, or contains a character that is not in the input alphabet.

pub fn validate<S>(&self, s: S) -> Result<bool, LuhnError>

where S: AsRef<str>,

Validates a Luhn check character. This assumes that the final character of the input string is the Luhn character, and it will validate that the remainder of the string is correct.

pub fn validate_with<S>(&self, s: S, check: char) -> Result<bool, LuhnError>

where S: AsRef<str>,

Validates a Luhn check character. This is the same as the validate method, but allows providing the Luhn check character out-of-band from the input to validate.

Trait Implementations

impl Debug for Luhn

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

Formats the value using the given formatter.