From 0c3ce7943dbaae422211ea12bd8c4a7d8e7d6fa9 Mon Sep 17 00:00:00 2001
From: Jon Gjengset <jon@thesquareplanet.com>
Date: Mon, 18 May 2020 14:12:10 -0400
Subject: [PATCH 1/3] Expose unilateral mailbox flag changes

This is a backwards incompatible change, since it adds a variant to a
public enum.
---
 src/parse.rs     | 11 +++++++++--
 src/types/mod.rs |  9 +++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/parse.rs b/src/parse.rs
index b2dc002..b7418a9 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -322,8 +322,15 @@ fn handle_unilateral<'a>(
         Response::MailboxData(MailboxDatum::Recent(n)) => {
             unsolicited.send(UnsolicitedResponse::Recent(n)).unwrap();
         }
-        Response::MailboxData(MailboxDatum::Flags(_)) => {
-            // TODO: next breaking change:
+        Response::MailboxData(MailboxDatum::Flags(flags)) => {
+            unsolicited
+                .send(UnsolicitedResponse::Flags(
+                    flags
+                        .into_iter()
+                        .map(|s| Flag::from(s.to_string()))
+                        .collect(),
+                ))
+                .unwrap();
         }
         Response::MailboxData(MailboxDatum::Exists(n)) => {
             unsolicited.send(UnsolicitedResponse::Exists(n)).unwrap();
diff --git a/src/types/mod.rs b/src/types/mod.rs
index 4a789e5..9757680 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -262,6 +262,15 @@ pub enum UnsolicitedResponse {
     /// sequence numbers 9, 8, 7, 6, and 5.
     // TODO: the spec doesn't seem to say anything about when these may be received as unsolicited?
     Expunge(Seq),
+
+    /// An unsolicited [`FLAGS` response](https://tools.ietf.org/html/rfc3501#section-7.2.6) that
+    /// identifies the flags (at a minimum, the system-defined flags) that are applicable in the
+    /// mailbox. Flags other than the system flags can also exist, depending on server
+    /// implementation.
+    ///
+    /// See [`Flag`] for details.
+    // TODO: the spec doesn't seem to say anything about when these may be received as unsolicited?
+    Flags(Vec<Flag<'static>>),
 }
 
 /// This type wraps an input stream and a type that was constructed by parsing that input stream,

From cf4aed569b62dfcc9dea0b54778bba4886de06d3 Mon Sep 17 00:00:00 2001
From: Jon Gjengset <jon@thesquareplanet.com>
Date: Mon, 18 May 2020 14:12:34 -0400
Subject: [PATCH 2/3] Make UnsolicitedResponse non_exhaustive

That way, as we discover additional unilateral responses in the future,
we won't have to make a breaking change to add them.
---
 src/types/mod.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/types/mod.rs b/src/types/mod.rs
index 9757680..8a13903 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -211,6 +211,7 @@ pub use imap_proto::StatusAttribute;
 /// Note that `Recent`, `Exists` and `Expunge` responses refer to the currently `SELECT`ed folder,
 /// so the user must take care when interpreting these.
 #[derive(Debug, PartialEq, Eq)]
+#[non_exhaustive]
 pub enum UnsolicitedResponse {
     /// An unsolicited [`STATUS response`](https://tools.ietf.org/html/rfc3501#section-7.2.4).
     Status {

From 02ce8cb5118e77e0ff6287418074a954ba9acfc6 Mon Sep 17 00:00:00 2001
From: Jon Gjengset <jon@thesquareplanet.com>
Date: Mon, 18 May 2020 14:28:08 -0400
Subject: [PATCH 3/3] Bump MSRV for non_exhaustive

---
 azure-pipelines.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 5cc11d8..f9e126c 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -47,12 +47,12 @@ jobs:
  - job: msrv
    pool:
      vmImage: ubuntu-latest
-   displayName: "Minimum supported Rust version: 1.36.0"
+   displayName: "Minimum supported Rust version: 1.40.0"
    dependsOn: []
    steps:
      - template: install-rust.yml@templates
        parameters:
-         rust: 1.36.0
+         rust: 1.40.0
      - script: cargo check
        displayName: cargo check
  - job: integration