Merge pull request #59 from silverpill/key-ex-error

Implement std::error::Error for SimpleKeyExtractionError

Author: AaronErhardt

src/key_extractor.rs

@@ -4,6 +4,7 @@ use actix_web::{HttpResponse, HttpResponseBuilder, ResponseError};
 use governor::clock::{Clock, DefaultClock, QuantaInstant};
 use governor::NotUntil;
 
+use std::error::Error;
 use std::fmt::{Debug, Display};
 use std::{hash::Hash, net::IpAddr};
 
@@ -195,6 +196,8 @@ impl<T: Display + Debug> Display for SimpleKeyExtractionError<T> {
     }
 }
 
+impl<T: Display + Debug> Error for SimpleKeyExtractionError<T> {}
+
 impl<T: Display + Debug> ResponseError for SimpleKeyExtractionError<T> {
     fn status_code(&self) -> StatusCode {
         self.status_code