From 166a0cb6b3a9d630557e04e41344ed477d5c084c Mon Sep 17 00:00:00 2001
From: Todd Mortimer <todd@opennet.ca>
Date: Sun, 6 Dec 2020 15:49:11 -0500
Subject: [PATCH] Link to QRESYNC RFC section describing VANISHED vs EXPUNGE
 responses.

---
 src/parse.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/parse.rs b/src/parse.rs
index 0b57f52..9bf61b9 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -158,6 +158,10 @@ pub fn parse_expunge(
         }
     }
 
+    // If the server sends a VANISHED response then they must only send VANISHED
+    // in lieu of EXPUNGE responses for the rest of this connection, so it is
+    // always one or the other.
+    // https://tools.ietf.org/html/rfc7162#section-3.2.10
     if !vanished.is_empty() {
         Ok(Deleted::from_vanished(vanished))
     } else {