Struct cargo_lambda_interactive::validator::MinLengthValidator

pub struct MinLengthValidator { /* private fields */ }

Built-in validator that checks whether the answer length is larger than or equal to the specified threshold.

The validator uses a custom-built length function that has a special implementation for strings which counts the number of graphemes. See this StackOverflow question.

Examples

use inquire::validator::{MinLengthValidator, StringValidator, Validation};

let validator = MinLengthValidator::new(3);
assert_eq!(Validation::Valid, validator.validate("Yes")?);
assert_eq!(
    Validation::Invalid("The length of the response should be at least 3".into()),
    validator.validate("No")?,
);

let validator = MinLengthValidator::new(3).with_message("You have to give me more than that!");
assert_eq!(Validation::Valid, validator.validate("Yes")?);
assert_eq!(
    Validation::Invalid("You have to give me more than that!".into()),
    validator.validate("No")?,
);

Implementations

impl MinLengthValidator

pub fn new(limit: usize) -> MinLengthValidator

Create a new instance of this validator, requiring at least the given length, otherwise returning an error with default message.

pub fn with_message(self, message: impl Into<String>) -> MinLengthValidator

Define a custom error message returned by the validator. Defaults to The length of the response should be at least $length.

Trait Implementations

impl Clone for MinLengthValidator

fn clone(&self) -> MinLengthValidator

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> MultiOptionValidator<T> for MinLengthValidatorwhere
    T: ?Sized,

fn validate(
    &self,
    input: &[ListOption<&T>]
) -> Result<Validation, Box<dyn Error + Sync + Send + 'static, Global>>

Confirm the given input list is a valid value.

impl StringValidator for MinLengthValidator

fn validate(
    &self,
    input: &str
) -> Result<Validation, Box<dyn Error + Sync + Send + 'static, Global>>

Confirm the given input string is a valid value.