From 267b741ac43af722292a8c81454b55daf5c83c69 Mon Sep 17 00:00:00 2001
From: Kodi Craft <kodi@kdcf.me>
Date: Tue, 25 Jun 2024 00:03:29 +0200
Subject: [PATCH] implement std::error::Error for the error type

---
 src/lib.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 9cc75e1..d016c9d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -348,6 +348,26 @@ fn derive_protocol(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream
                 }
             }
         }
+        impl ::std::error::Error for #error_enum_name {
+            fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
+                match self {
+                    #error_enum_name::SendError(e) => ::std::option::Option::Some(e),
+                    #error_enum_name::Closed => ::std::option::Option::None,
+                }
+            }
+            fn description(&self) -> &str {
+                match self {
+                    #error_enum_name::SendError(_) => "Failed to send query",
+                    #error_enum_name::Closed => "Connection closed",
+                }
+            }
+            fn cause(&self) -> ::std::option::Option<&dyn ::std::error::Error> {
+                match self {
+                    #error_enum_name::SendError(e) => ::std::option::Option::Some(e),
+                    #error_enum_name::Closed => ::std::option::Option::None,
+                }
+            }
+        }
     };
     // Create enums for the types of messages the server and client will use