actix-extras/src/extractors/config.rs

use super::AuthenticationError;
use crate::headers::www_authenticate::Challenge;

pub trait ExtractorConfig {
    type Inner: Challenge;

    fn into_inner(self) -> Self::Inner;
}

impl<T> From<T> for AuthenticationError<<T as ExtractorConfig>::Inner>
where
    T: ExtractorConfig,
{
    fn from(config: T) -> Self {
        AuthenticationError::new(config.into_inner())
    }
}