cnpj-rs

Brazilian CNPJ parsing, validating and formatting library.

```rust use cnpj::Cnpj;

// Use the valid function if all you need is validating a CNPJ number assert!(cnpj::valid("96.769.900/0001-77")); assert!(cnpj::valid("96769900000177")); assert!(!cnpj::valid("00.000.000/0000-00"));

// Parse into a Cnpj struct if you need formatting or other metadata let cnpj: Cnpj = "96769900000177".parse()?; asserteq!(format!("{}", cnpj), "96.769.900/0001-77"); asserteq!(cnpj.digits(), [9, 6, 7, 6, 9, 9, 0, 0, 0, 0, 0, 1, 7, 7]);

// Note that the Cnpj struct is guaranteed to always be valid assert!("00.000.000/0000-00".parse::().is_err()); assert!(cnpj::valid("96.769.900/0001-77".parse::()?)); ```

no_std support

The library makes no dinamic allocation and can be used on no_std environments by disabling the std flag:

toml [dependencies] cnpj = { version = "0.2", default-features = false }

Random CNPJ generation support

The rand feature flag enables random CNPJ generation:

toml [dependencies] cnpj = { version = "0.2", features = ["rand"] } rand = "0.8"

```rust use cnpj::Cnpj; use rand; use rand::Rng;

let cnpj: Cnpj = rand::thread_rng().gen(); ```