Crate luhncalc 

Reusable helpers for validating digit sequences with the Luhn algorithm.

Examples

use luhncalc::{analyze, calculate_check_digit, validate};

assert!(!validate("1234567890")?);
assert_eq!(calculate_check_digit("1234567890")?, '3');

let analysis = analyze("12345678903")?;
assert!(analysis.valid);
assert_eq!(analysis.next_check_digit, '1');

Structs

Analysis

The combined result of validating a digit sequence and computing the next check digit for that sequence.

Enums

DigitSequenceError

Error returned when the provided digit sequence cannot be processed.

Functions

analyze

Validate a sequence and calculate its next check digit in one call.

calculate_check_digit

Calculate the check digit that should be appended to a sequence.

validate

Validate whether a digit sequence passes the Luhn algorithm.