From 3203871d6b608b9dbb75ca39143424582e5e578c Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 26 Mar 2022 00:32:52 +0000
Subject: [PATCH] Introduce InvalidAbbrevPresentationLayout error type

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/ui.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/ui.rs b/src/ui.rs
index 38be33c1..855099cd 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -74,14 +74,18 @@ impl Default for PresentationLayout {
 #[derive(Debug)]
 pub struct AbbrevPresentationLayout(pub PresentationLayout);
 
+#[derive(Error,Debug,Clone,Copy)]
+#[error("Invalid presentation layout character")]
+pub struct InvalidAbbrevPresentationLayout;
+
 impl FromStr for AbbrevPresentationLayout {
-  type Err = ();
+  type Err = InvalidAbbrevPresentationLayout;
   #[throws(Self::Err)]
   fn from_str(s: &str) -> Self {
     AbbrevPresentationLayout(match s {
       "p" => PL::Portrait,
       "l" => PL::Landscape,
-      _ => throw!(())
+      _ => throw!(InvalidAbbrevPresentationLayout)
     })
   }
 }
-- 
2.30.2