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

  E? lastError;

  for (final validator in validators) {
    final result = validator.validate(value);
    if (result.isValid) {
      return result;
    }
    lastError = result.errorOrNull;
  }

  return Invalid(fallbackError ?? lastError as E);
}