Struct Alphanumeric 

pub struct Alphanumeric;

Accepts strings whose characters are all alphanumeric.

Uses the Unicode definition of alphanumeric (char::is_alphanumeric). An empty string passes vacuously; combine with NonEmpty to also require content.

Examples

use type_lib::rules::Alphanumeric;
use type_lib::Validator;

assert!(Alphanumeric::validate("abc123").is_ok());
assert!(Alphanumeric::validate("abc 123").is_err()); // space
assert!(Alphanumeric::validate("user_name").is_err()); // underscore

Trait Implementations

impl<S: AsRef<str> + ?Sized> Validator<S> for Alphanumeric

type Error = ValidationError

The failure produced when a value violates the rule.

fn validate(value: &S) -> Result<(), Self::Error>

Checks value against the rule.