Implement the Display and Error traits for the check Reason (#1102

)

src/framework/standard/structures/check.rs

@@ -1,9 +1,9 @@
-use std::fmt::Debug;
-use std::fmt;
-use crate::model::channel::Message;
 use crate::client::Context;
 use crate::framework::standard::{Args, CommandOptions};
+use crate::model::channel::Message;
 use futures::future::BoxFuture;
+use std::error::Error;
+use std::fmt::{self, Debug, Display};
 
 /// This type describes why a check has failed.
 ///
@@ -27,6 +27,8 @@ pub enum Reason {
     UserAndLog { user: String, log: String },
 }
 
+impl Error for Reason {}
+
 pub type CheckFunction = for<'fut> fn(
     &'fut Context,
     &'fut Message,
@@ -63,6 +65,19 @@ impl Debug for Check {
     }
 }
 
+impl Display for Reason {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Unknown => write!(f, "Unknown"),
+            Self::User(reason) => write!(f, "User {}", reason),
+            Self::Log(reason) => write!(f, "Log {}", reason),
+            Self::UserAndLog { user, log } => {
+                write!(f, "UserAndLog {{user: {}, log: {}}}", user, log)
+            }
+        }
+    }
+}
+
 impl PartialEq for Check {
     fn eq(&self, other: &Self) -> bool {
         self.name == other.name