validate method

@override ValidationResult<T, E> validate(T value)

Validates value and returns a ValidationResult.

Returns Valid if the value passes validation, or Invalid/InvalidAll if it fails.

Implementation

@override
ValidationResult<T, E> validate(T value) {
  final errors = <E>[];

  for (final validator in validators) {
    final result = validator.validate(value);
    errors.addAll(result.errors);
  }

  if (errors.isEmpty) {
    return Valid(value);
  }

  return errors.length == 1 ? Invalid(errors.first) : InvalidAll(errors);
}