From 670361b7c3e469e020379e040974aebfca3b1c3a Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 19 Mar 2021 00:22:47 +0000
Subject: [PATCH] clock: impl TryFrom<char> for User

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/clock.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/clock.rs b/src/clock.rs
index 5be01c6f..978650c8 100644
--- a/src/clock.rs
+++ b/src/clock.rs
@@ -59,6 +59,16 @@ impl TryFrom<u8> for User {
   }) }
 }
 
+impl TryFrom<char> for User {
+  type Error = BadClockUserError;
+  #[throws(BadClockUserError)]
+  fn try_from(c: char) -> User { User(match c {
+    'x' | 'X' => false,
+    'y' | 'Y' => true,
+    _ => throw!(BadClockUserError),
+  }) }
+}
+
 impl From<User> for u8 {
   fn from(user: User) -> u8 { user.0 as u8 }
 }
-- 
2.30.2