From 78785279c6b26b062efed2504bdf3be6503484c3 Mon Sep 17 00:00:00 2001
From: Zeeshan Ali <zeeshan@instant.ca>
Date: Fri, 7 Oct 2022 15:58:38 +0200
Subject: [PATCH] Declare open-ended enum types as non-exhaustive

So that future variant additions don't require API break.
---
 src/types.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/types.rs b/src/types.rs
index a9c897b..ba6ebe2 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -289,6 +289,7 @@ impl AtomOrQuoted {
 
 #[cfg_attr(feature = "serdex", derive(Serialize, Deserialize))]
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
 pub enum Response {
     Greeting {
         domain: String,
@@ -409,6 +410,7 @@ impl Response {
 
 #[cfg_attr(feature = "serdex", derive(Serialize, Deserialize))]
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
 pub enum Capability {
     // Send as mail [RFC821]
     // The description of SEND was updated by [RFC1123] and then its actual use was deprecated in [RFC2821]
@@ -591,6 +593,7 @@ impl Capability {
 
 #[cfg_attr(feature = "serdex", derive(Serialize, Deserialize))]
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
 pub enum AuthMechanism {
     Plain,
     Login,