Trait dialoguer::Validator

pub trait Validator<T> {
    type Err: Debug + Display;
    fn validate(&self, input: &T) -> Result<(), Self::Err>;
}

Trait for input validators.

A generic implementation for Fn(&str) -> Result<(), E> is provided to facilitate development.

Associated Types

type Err: Debug + Display

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Required methods

fn validate(&self, input: &T) -> Result<(), Self::Err>

Invoked with the value to validate.

If this produces Ok(()) then the value is used and parsed, if an error is returned validation fails with that error.

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Implementors

impl<T, F: Fn(&T) -> Result<(), E>, E: Debug + Display> Validator<T> for F

type Err = E

fn validate(&self, input: &T) -> Result<(), Self::Err>

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