Trait InputValidator 

pub trait InputValidator<T> {
    type Err;

    // Required method
    fn validate(&mut self, input: &T) -> Result<(), Self::Err>;
}

Trait for input validators.

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

Required Associated Types

type Err

Required Methods

fn validate(&mut 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.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T, F, E> InputValidator<T> for F

where F: FnMut(&T) -> Result<(), E>,

type Err = E