digits<E> static method

Rule<String, E> digits<E>({
  1. required E error,
})

Validates that the string contains only digits.

StringRules.digits(error: 'Must contain only digits')

Implementation

static Rule<String, E> digits<E>({required E error}) => PredicateRule(
      predicate: (value) => _digitsRegex.hasMatch(value),
      error: error,
    );